Particle boards GOST. Chipboard: production, gost, characteristics, dimensions

STATE STANDARD

UNION SSR

WOOD CHIP PLATES

TECHNICAL CONDITIONS GOST 10632-89

Official edition

IPK PUBLISHING STANDARDS Moscow

UDC 674.815-41: 006.354 Group K23

STATE STANDARD OF THE UNION OF SSR

WOOD CHIP PLATES

Technical conditions

Wood particle boards. Specifications

Introduction date 01.01.90

This standard applies to general-purpose particle boards made by hot flat pressing of wood particles mixed with a binder, used for the production of furniture, in construction (except for residential construction, construction of buildings for children, schools and hospitals), in mechanical engineering, radio equipment and production of containers.

The use of plates for specific types of products is established by agreement with the authorities of sanitary and epidemiological supervision in the appropriate standards and technical conditions.

The standard does not apply to slabs with veneered or painted surfaces.

Mandatory requirements for chipboards aimed at ensuring safety for life and health of the population and protecting the environment are set out in paragraphs. 1.5, 1.6 (in terms of ultimate strength in bending and tensile perpendicular to the plate face), 1.8, 1.10.

1. TECHNICAL REQUIREMENTS

1.1. Plates are subdivided:

by physical and mechanical indicators - for grades P-A and P-B; by surface quality - for I and II grades;

by the type of surface - with a normal and fine-structured (M) surface; according to the degree of surface treatment - into polished (W) and unpolished; by hydrophobic properties - with normal and increased (B) water resistance; by formaldehyde content - into emission classes El, E2.

(Modified edition, Amendment No. 1).

1.2. The dimensions of the slabs must correspond to those indicated in table. 1. * *

Notes:

1. The thickness of unpolished slabs is set as the sum of the nominal thickness of the sanded slab and the allowance for grinding, which should not be more than 1.5 mm.

2. It is allowed to produce slabs with dimensions less than the main ones by 200 mm with a gradation of 25 mm, in an amount not exceeding 5% of the batch.

3. By agreement with the consumer, it is allowed to produce plates of formats not specified in table. 1.

Official edition Reprinting prohibited

* © Standards Publishing House, 1989

© IPK Publishing house of standards, 1998 Reissued with changes

1.3. The deviation from the straightness of the edges should not be more than 2 mm.

1.4. The deviation from the perpendicularity of the edges of the slabs should not be more than 2 mm per 1000 mm of the length of the edge.

The perpendicularity of the edges can be determined by the difference in the lengths of the seam diagonals, which should not be more than 0.2% of the slab length.

1.5. Plates should be made using synthetic resins approved by the sanitary and epidemiological supervision authorities.

Under operating conditions, the amount of chemicals emitted by the stoves should not exceed the maximum permissible concentrations in the environment approved by the Sanitary and Epidemiological Supervision Authorities for atmospheric air.

1.6. Physical and mechanical indicators of plates with a density from 550 kg / m 3 to 820 kg / m 3 must comply with the standards specified in table. 2.

Reference values ​​of physical and mechanical indicators of particle boards are given in Appendix 1.

table 2

Indicator name	The norm for slab brands
Moisture,% T * n
Swelling in thickness:
in 24 h (sample size 100 x 100 mm),%, (D c)
for 2 h (sample size 25 x 25 mm),%, (T c) **
Flexural strength, MPa, for thicknesses, mm (Tn):
Tensile strength perpendicular to the formation
slabs, MPa, for thicknesses, mm (TC):
Specific resistance to pulling out screws, N / mm (T and) ***:
from the reservoir
Warpness, mm (T in)
Roughness of the seam surface Rm, μm, no more, for samples
a) with a dry surface:
for ground titanium with fine textured surface
for unpolished slabs
b) after 2 hours of soaking ***:
for sanded slabs with a regular surface
for sanded slabs with fine textured surfaces
for unpolished slabs

* T n and T in - respectively the lower and upper limits of indicators. ** For slabs with increased water resistance.

*** Determined by agreement between the manufacturer and the consumer.

1.7. The surface quality of the slabs must comply with the standards specified in table. 3.

Table 3

Defect according to GOST 279 35

Standard for slabs

polished, grades

unpolished, grades

Depressions (protrusions) or scratches in the formation

Paraffin, oil and binder stains

Dust stains

Chipped edges

Chipping corners

Grinding imperfections (under-grinding, grinding, linear grinding marks, surface waviness)

Separate inclusions of bark particles per g of the slab mouth size, mm, no more

Individual inclusions of coarse shavings:

for slabs with fine textured surfaces

for slabs with a regular surface

Extraneous inclusions

Not allowed

Not allowed (single units with a depth of 3 mm and less along the edge of 15 mm or less are not taken into account)

Not allowed (edge ​​length 3 mm or less is not considered)

Not allowed

Allowed on 1 m 2 surface no more than two grooves with a diameter of up to 20 mm and a depth of 0.3 mm or two scratches up to 200 mm long

Allowed for 1 g of the surface of the slab spots with an area of ​​not more than 1 cm 2 in the amount of 2 pgg.

Allowed on an area of ​​no more than 5% of the surface of the slab, depth (height), mm, no more:

0,8

Allowed on an area of ​​no more than 2% of the surface

Allowed on Allowed

area not more than 2% of the surface

Allowed within deviations along the length (width) of the slab

Allowed within deviations along the length (width) of the slab

Allowed with an area of ​​not more than 10% of the area of ​​each layer

Do not define

Allowed in the amount of 5 pieces. per 1 m 2 of a slab layer, size, mm:

Not defined Not allowed

Note. Allowed for plates with a normal surface no more than 5 pcs. individual inclusions of bark particles per 1 m 2 of the slab bed size, mm: for grade I more than 3 to 10; for grade II - more than 10 to 15.

Formaldehyde emission class

Up to 10 incl. St. 10 "30"

1.5-1.8. (Modified edition, Amendment No. 1).

1.9. In the legend of the plates indicate:

type of surface (for slabs with a fine-textured surface); the degree of surface treatment (for ground slabs); hydrophobic properties (for boards with increased water resistance); formaldehyde emission class; length, width and thickness in millimeters; designation of this standard.

Examples of symbols:

boards of grade П-А of the first grade with a fine-structured surface of polished emission class E1 with dimensions of 3500 x 1750 x 15 mm:

The same for slabs of grade П-Б of the second grade with a normal surface of unpolished emission class E2 with dimensions of 3500 x 1750 x 16 mm:

1.10 Marking is applied to the edge of the board in the form of a clear stamp with dark dye, containing:

name and (or) trademark of the manufacturer;

brand, grade, surface type and emission class;

production date and shift number.

Plates for export are labeled according to regulatory and technical documentation.

The certified products bear the national conformity mark in accordance with GOST R 50460 *.

(Modified edition, Amendment No. 1).

1.11. Plates intended for use in the Far North and equivalent areas are packed in accordance with GOST 15846.

For export, plates are packed in accordance with the requirements of foreign economic organizations.

2 1 Plates are accepted in lots. A batch should consist of boards of the same brand, size, grade, degree of processing and type of surface, the same shdrophobic properties and emission class, manufactured according to the same technological mode, for a limited period of time (as a rule, within one shift) and issued with one quality document containing: the name of the organization, which includes the manufacturer; name and (or) trademark of the manufacturer and its address; conventional designation of slabs;

average density of slabs in a batch in kilograms per cubic meter; number of plates in a batch in pieces and square meters; technical control stamp.

2.2. The quality and dimensions of the slabs in the batch are checked by random control.

2.3. During random inspection, the slabs are taken “blindly” in accordance with GOST 18321.

P-A, I, M, W, E1, 3500 x 1750 x 15, GOST 10632-89.

P-B, II, E2, 3500 x 1750 x 16, GOST 10632-89.

2. RULES OF ACCEPTANCE

Operates on the territory of the Russian Federation.

2.4. To control the dimensions, straightness, perpendicularity, surface quality and roughness (when controlled by roughness samples) from each batch, depending on its volume, plates are selected in the amount indicated in table. 5.

Table 5

2.5. To control the physical and mechanical indicators (including the roughness when controlling it with a profilograph), plates are taken from each batch, depending on its volume, in the amount indicated in the table. 6.

It is allowed to include in the sample slabs selected for control according to clause 2.4, as well as to distribute the test results of the physical and mechanical parameters of slabs made according to one technological mode during one shift to the entire shiftable volume of workings, regardless of the grade of slabs.

Table 6

2.6. The "formaldehyde content" indicator is monitored at least once every 7 days on samples taken from one plate.

2.7. The lot is considered to meet the requirements of this standard and is accepted if in the samples:

the number of plates that do not meet the requirements of the standard in terms of size, straightness, perpendicularity, surface quality and roughness (when controlled by roughness samples) is less than or equal to the acceptance number established in table. 5;

the values ​​of Q K and £> in, calculated by formulas (1) and (2) for each physical and mechanical indicator are equal or more than the acceptance constant (Table 6).

QvT -y ~ n (1); Q "= ^ s- (2),

where X is the sample mean calculated from the test results of all slabs in the sample;

T and - the lower limit of indicators according to the table. 2;

T in - the upper limit of indicators according to the table. 2;

S is the standard deviation, calculated from the average values ​​of all tested slabs.

Results are rounded to the second decimal place.

An example of calculating the value of Q H is given in Appendix 2;

the density of each slab is within the limits specified in clause 1.6, and should not be lower than that indicated in the quality document by more than 12%.

The roughness of the surface of each sample, when controlled by a profilograph, must comply with the standards established in table. 2.

(Modified edition, Amendment No. 1).

3. TEST METHODS

3.1. General rules for conducting tests to determine physical and mechanical parameters and sample preparation - in accordance with GOST 10633.

3.2. Control of length, width, thickness - according to GOST 27680.

Perpendicularity control - in accordance with GOST 27680 or by the difference in the length of the diagonals along the face, measured with a metal tape measure with a scale of 1 mm in accordance with GOST 7502.

Control of straightness of edges - in accordance with GOST 27680 using a device or a straightedge in accordance with GOST 8026 1000 mm long not less than the second class of accuracy and a set of probes No. 4.

(Modified edition, Amendment No. 1).

3.3. Density, moisture content and thickness swelling are determined in accordance with GOST 10634.

3.4. The bending accuracy limit is determined in accordance with GOST 10635.

3.5. The ultimate tensile strength perpendicular to the plate face is determined in accordance with GOST 10636.

3.6. Specific resistance to pulling out screws - according to GOST 10637.

3.7. Warpness is determined according to GOST 24053.

3.8. The surface roughness is determined according to GOST 15612 on a profilograph with a stylus radius of 1.5 mm or using roughness samples.

(Modified edition, Amendment No. 1).

3.9. The type of surface is determined by samples.

3.11. The surface quality of the slabs is assessed visually.

3.12. Determination of the types of spots and waviness on the surface of the slab is made by comparison with samples approved in the prescribed manner.

The spotted surface area of ​​a slab is defined as the sum of the individual spot areas on both sides of the slab.

To determine the area of ​​the spot with an accuracy of I cm 2, a grid with square cells with a side of 10 mm, applied on a transparent sheet material, is used. Accuracy of drawing grid lines ± 0.5 mm. When calculating the number of cells overlapped by a spot, cells with an overlap of more than half of their area are considered whole, and with an overlap of less than half, they are not taken into account.

3.13. The depth of the recess and the height of the protrusions are determined using a dial indicator ICh-10 in accordance with GOST 577, fixed in a metal U-shaped bracket with cylindrical supporting surfaces with a radius of (5 ± 1) mm and a span between the supports of 60-80 mm.

The indicator scale is set to zero position when the bracket is installed on a straight edge in accordance with GOST 8026 or a surface plate in accordance with GOST 10905.

The stroke of the indicator rod on both sides of the reference plane must be at least 2 mm.

3.14. The linear dimensions of bark inclusions, large chips, spots, corner chipping, edge chipping and the length of scratches are determined using a metal ruler in accordance with GOST 427.

4. TRANSPORTATION AND STORAGE

4.1. Plates are transported by all types of transport in accordance with the Rules for the carriage of goods in force for this type of transport, and the technical conditions for loading and securing goods of the Ministry of Railways with mandatory protection from atmospheric precipitation and mechanical damage.

4.2. Transport marking - in accordance with GOST 14192.

4.3. Plates are stored in closed rooms in a horizontal position in stacks up to 4.5 m high, consisting of stacks or packages separated by spacer bars with a thickness and width of at least 80 mm and a length of at least the width of the plate or pallets.

The difference in thickness of the spacers used for one stack or package is allowed - 5 mm.

Bars-gaskets are laid across the slabs at intervals of not more than 600 mm in the same vertical planes.

The distance from the extreme spacer bars to the ends of the slab should not exceed 250 mm.

APPENDIX 1 Reference

PHYSICAL AND MECHANICAL INDICATORS OF WOOD CHIP PLATES

APPENDIX 2 Reference

EXAMPLE OF CALCULATION OF VALUE It FOR INDICATOR STRENGTH STRENGTH IN BENDING

954 pcs were produced during one shift. chipboards 15 mm thick.

The sample volume of plates from a batch for testing according to table. 6 - 5 pcs.

From each selected slab, 8 samples are cut out to determine the ultimate strength in bending (according to GOST 10633).

Sample test results in accordance with GOST 10635 (MPa):

1st plate 15.9; 15.1; 15.8; 17.3; 16.0; 16.4; 16.8; 18.1;

2nd "16.8; 17.2; 17.0; 18.3; 18.0; 18.0; 17.4; 17.3;

3rd "19.2; 19.0; 17.1; 19.5; 21.0; 18.9; 18.0; 18.5;

4th "15.9; 17.9; 20.0; 19.1; 17.0; 17.3; 16.2; 16.0;

5th "19.0; 19.0; 19.1; 19.8; 18.7; 18.8; 17.7; 18.8.

In accordance with GOST 10635, for each plate, the sample arithmetic mean of the test results of all samples taken from this plate is calculated using the formula

where a U ij- test results of the y-th sample, the i-th slab of a sample of n slabs; t is the number of samples taken from each plate;

a u i = d (15.9 + 15.1 + 15.8 + 17.3 + 16.0 + 16.4 + 16.8 + 18.1) = 16.425 (MPa).

In accordance with GOST 10635, the calculation results are rounded to the nearest decimal place:

o and 1 = 16.4 MPa.

Determine the arithmetic mean of the 2nd, 3rd, 4th and 5th plates:

B and 2 = 17.5 MPa; st "e = 18.9 MPa; and u 4 = 17.4 MPa; B and b = 18.9 MPa.

The sample average of st and slabs is calculated by the formula

a u = ~ (16.4 + 17.5 + 18.9 + 17.4 + 18.9) = 17.8 MPa.

The standard deviation is calculated from the average values ​​of all tested slabs according to the formula

To check the compliance of the batch with the requirements for PA slabs, the value of the Q H value is calculated by the formula

17,8 - 16,0 1,08

The resulting value £? n = 1.67 is greater than the acceptance constant k = 1.24, which means that the batch of plates complies with this standard in terms of bending strength.

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the USSR Ministry of Forestry DEVELOPERS

O.E. Potashev, Cand. tech. sciences; A.F. Abelson, Candidate, Tech. sciences; I.V. Pintus

2. APPROVED AND INTRODUCED INTO EFFECT by the Decree of the USSR State Committee for Standards dated 02.02.89 No. 13

3. REPLACE GOST 10632-77

4. The term of the first inspection is 1994.

Inspection period - 5 years

5. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

GOST 427-75 GOST 577-68 GOST 7502-89 GOST 8026-92 GOST 10633-78 GOST 10634-88 GOST 10635-88 GOST 10636-90 GOST 10637-78 GOST 10905-86 GOST 11842-76 GOST 11843-76 GOST 14192 -96 GOST 15846-79 GOST 15612-85 GOST 18321-73 GOST 23234-78 GOST 24053-80 GOST 27678-88 GOST 27680-88 GOST 27935-88 GOST R 50460-92

Item number, application

3.1, appendix 2

3.4, appendix 1, appendix 2

Appendix 1 Appendix 1

Annex 1

6. The limitation of the validity period has been removed according to the protocol No. 4-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 4-94)

7. REPUBLICATION (December 1997) with Amendment No. 1, approved in April 1994 (IUS 7-94)

Editor M.I. Maksimova Technical editor V.N. Prusakova Proofreader M.S. Kabashova Computer layout V.I. Grishchenko

Ed. persons. No. 021007 dated 08/10/95. Donated to the set 12/30/97. Signed to print on 21.01.98. Uel. print l. 1.40.

Uch.-ed. l. 0.95. Circulation 214 copies. C56. Zach. 49.

IPK Standards Publishing House, 107076, Moscow, Kolodezny per., 14.

Typeset in the Publishing House on a PC

Branch of IPK Publishing house of standards - type. "Moscow printer", Moscow, Lyalin per., 6.

Annex 1

Annex 1

polished, grades

unpolished, grades

Depressions (protrusions) or scratches on the face

Not allowed

Allowed for 1 m of surface no more than two depressions with a diameter of up to 20

Allowed on an area of ​​no more than 5% of the surface of the slab, depth (height), mm, no more:

mm and up to 0.3 mm deep or two scratches up to 200 mm long

Paraffin, oil and binder stains

On 1 m of the surface of the slab, spots with an area of ​​not more than 1 cm are allowed in the amount of 2 pcs.

Dust stains

Allowed on an area of ​​not more than 2% of the surface of the slab

Allowed

Chipped edges

Not allowed (single units with a depth of 3 mm and less along the edge of 15 mm or less are not taken into account)

Allowed within deviations along the length (width) of the slab

Chipping corners

Not allowed (edge ​​length 3 mm or less is not considered)

Allowed within deviations along the length (width) of the slab

Grinding defects (undergrinding, grinding, linear grinding marks, surface waviness)

Not allowed

Allowed with an area of ​​no more than 10% of the area of ​​each face

Do not define

Separate inclusions of bark particles on the plate layer size, mm, not more

Individual inclusions of coarse shavings:

for slabs with fine textured surfaces

Allowed in the amount of 5 pieces. per 1 m of the plate size, mm:

for slabs with a regular surface

Do not define

Extraneous inclusions

Not allowed

Note. Allowed for plates with a normal surface no more than 5 pcs. individual inclusions of bark particles per 1 m of the slab bed size, mm: for grade I more than 3 to 10; for grade II - more than 10 to 15.

1.8. Depending on the formaldehyde content, the boards are manufactured in two emission classes indicated in Table 4.

Table 4

Formaldehyde emission class
	Up to 10 incl.
	St. 10 "30"

1.5-1.8.

1.9. In the legend of the plates indicate:

brand;

grade;

type of surface (for slabs with a fine-textured surface);

the degree of surface treatment (for ground slabs);

hydrophobic properties (for boards with increased water resistance);

formaldehyde emission class;

length, width and thickness in millimeters;

designation of this standard.

Examples of symbols:

boards of grade PA of the first grade with a fine-structured surface of polished emission class E1 with dimensions of 3500x1750x15 mm:

P-A, I, M, Sh, E1, 3500x1750x15, GOST 10632-89.

The same for slabs of grade П-Б of the second grade with a regular surface of unpolished emission class E2 with dimensions of 3500x1750x16 mm:

P-B, II, E2, 3500x1750x16, GOST 10632-89.

1.10. On the edge of the plate, a marking is applied in the form of a clear stamp with a dark dye, containing:

name and (or) trademark of the manufacturer;

brand, grade, surface type and emission class;

production date and shift number.

Plates for export are labeled according to regulatory and technical documentation.

The certified products bear the national conformity mark in accordance with GOST R 50460 *.
_________________
* Valid on the territory of the Russian Federation.

(Modified edition, Amendment N 1).

1.11. Plates intended for use in the Far North and equivalent areas are packed in accordance with GOST 15846.

For export, plates are packed in accordance with the requirements of foreign economic organizations.

2. RULES OF ACCEPTANCE

2.1. Plates are accepted in batches. A batch must consist of slabs of the same brand, size, grade, degree of processing and type of surface, the same hydrophobic properties and emission class, manufactured according to the same technological mode for a limited period of time (as a rule, within one shift) and issued with one quality document, containing:

the name of the organization that includes the manufacturer;

name and (or) trademark of the manufacturer and its address;

conventional designation of slabs;

average density of slabs in a batch in kilograms per cubic meter;

number of plates in a batch in pieces and square meters;

technical control stamp.

2.2. The quality and dimensions of the slabs in the batch are checked by random control.

2.3. During random inspection, the slabs are taken "blindly" in accordance with GOST 18321.

2.4. To control the dimensions, straightness, perpendicularity, surface quality and roughness (when controlled by roughness samples), plates are taken from each batch, depending on its volume, in the amount indicated in Table 5.

Table 5

Lot size	Controlled indicators by points:
	1.2, 1.3, 1.4		1.6 (roughness), 1.7
	sample size	acceptance number	sample size	acceptance number
From 501 "1200
" 1201 " 3200
" 3201 " 10000

2.5. To control the physical and mechanical parameters (including the roughness when controlling it with a profilograph), plates are taken from each batch, depending on its volume, in the amount indicated in Table 6.

It is allowed to include in the sample the slabs selected for control according to clause 2.4, as well as to distribute the test results of the physical and mechanical parameters of the slabs made according to one technological mode during one shift to the entire shiftable volume of workings, regardless of the grade of the slabs.

Table 6

Lot size, pcs.	Sample size, pcs.	Acceptance constant
From 281-500
" 501 " 1200
" 1201 " 3200
" 3201 " 10000

2.6. The indicator "formaldehyde content" is monitored at least once every 7 days on samples taken from one plate.

2.7. The lot is considered to meet the requirements of this standard and is accepted if in the samples:

the number of plates that do not meet the requirements of the standard in terms of size, straightness, perpendicularity, surface quality and roughness (when controlled by roughness samples) is less than or equal to the acceptance number specified in table 5;

the values ​​of and, calculated by formulas (1) and (2), for each physical and mechanical indicator are equal or more than the acceptance constant (Table 6).

where is the sample mean, calculated from the test results of all slabs in the sample;

- the lower limit of indicators according to table 2;

- the upper limit of indicators according to table 2;

is the standard deviation, calculated from the average values ​​of all tested slabs.

Results are rounded to the second decimal place.

An example of calculating the value is given in Appendix 2;

the formaldehyde content according to the results of the last control corresponds to the standards established in table 4;

the density of each slab is within the limits specified in clause 1.6, and should not be lower than that indicated in the quality document by more than 12%.

The roughness of the surface of each sample, when controlled by a profilograph, must comply with the standards established in Table 2.

(Modified edition, Amendment N 1).

The price is 3 kopecks.

WOOD CHIP PLATES

TECHNICAL CONDITIONS

GOST 10632-77

Official edition

USSR STATE COMMITTEE ON STANDARDS Moscow

UDC 674.815-41: 006.354 Group K23

STATE STANDARD OF THE UNION OF SSR

WOOD CHIP BOARDS Specifications

Wood particle boards. Technical specifications Supersedes

GOST 10632-GO

By the decree of the State Committee of Standards of the Council of Ministers of the USSR dated February 18, 1977 t, Ng 420, the validity period was established

from 01.01.1978 to 01.01.1983

Failure to comply with the standard is punishable by law

This standard applies to particle boards made by hot flat pressing of wood particles mixed with a binder.

The standard does not apply to veneered and finished particle boards.

1. BRANDS, BASIC PARAMETERS AND DIMENSIONS

1.1. Plates are subdivided into grades indicated in table. 1. Fields of application of the plates are given in the recommended Appendix 1. Plates of the P-2 brand are made of groups A and. B.

Table 1

Official edition Reprinting prohibited

Reissue. March 1979

© Standards Publishing House! 1979

P. 2 GOST 10632-77

1.2. The dimensions of the slabs must correspond to those indicated in table. 2.

table 2

Note. By agreement with the consumer, it is allowed to manufacture unpolished plates of grade P-2 with maximum deviations in thickness of no more than ± 0.9 mm.

The thickness at each measured point should not differ from the nominal thickness of the slab by more than the value of the maximum deviations indicated in table. 2.

1.3. It is allowed to make slabs of formats smaller than those indicated in table. 2 by 200 mm with a graduation every 25 mm, but in an amount not exceeding 5% of the delivered batch.

1.4. At the request of foreign trade associations, it is allowed to manufacture slabs of other thicknesses.

1.5. By agreement with the consumer, it is allowed to produce slabs of formats not listed in table. 2.

2. TECHNICAL REQUIREMENTS

2.1. Physical and mechanical properties and surface roughness of the slab must comply with the standards specified in table. 3. Non-standardized indicators of slabs are given in reference annex 2.

2.2. Plates must be made using synthetic resins approved by the USSR Ministry of Health.

Plates should not release harmful chemicals into the environment in quantities exceeding the permissible levels approved by the USSR Ministry of Health.

fdCT 16632-77 p. 3

2.3. The boards should be cut at right angles on four sides.

The difference in the length of the diagonals across the face should not exceed ± 0.2% of the slab length.

Table 3

Indicator name		The norm for slab brands
		Plate group
Humidity, %
Water absorption,%, no more		Not standardized
Swelling,%, no more: with normal water resistance with increased water resistance
Ultimate tensile strength perpendicular to the plate layer, MPa (kgf / cm 2), not less
Ultimate strength in static bending, MPa (kgf / cm 2), not less, for thicknesses, mm	from 10 to 14 incl.
	from 15 to 19 incl.
	20 and more
Hardness, MPa, (kgf / mm 2), not less		Not standardized
Density, kg / m 3
Parameter of surface roughness Rz m aх of the layer according to GOST 7016-75, μm, not more, for plates: unpolished polished polished with the state quality mark

* The surface roughness class according to GOST 7016-75 is indicated in parentheses.

** The density of the boards of one batch is considered the average density of the boards selected for testing.

2.4. In terms of surface quality, the slabs must comply with the standards specified in table. 4.

Table 4

Names defects	Standard for slabs
	sanded | unpolished
	with the state quality mark
	Slab brands
	P-1, P-2 of group A	P-1, P-2 and P-3
Grooves, protrusions and scratches	Not allowed		Tolerance; no more than a plate, deep	are at the i e 5% (bin (you are not more than:	fHNOST 100th), mm,
Binder, paraffin, oil stains	Not allowed		Allowed on an area of ​​no more than 2 #% of the surface of the slab	Not allowed	Allowed on an area of ​​not more than 2% of the surface of the slab
Individual inclusions of bark particles on the surface of slabs, mm, no more

Chips at the crotch - Allowed within the deviations in the length (width) of the mocks and chipping - slabs

angles

Notes;

1. The number of inclusions of bark particles larger than 6 mm for grade II slabs of grades P-2 and P-3 should not exceed 8 tit. on 0.01 m 2 of the surface.

2. Defects not listed in the table are not allowed.

2.5. Sanded chipboards of grades P-1 and P-2 of group A can be awarded the State Quality Mark in accordance with the established procedure.

2.6. Chipboards are supplied in sizes, grades, groups and grades according to the customer's specification.

3. RULES OF ACCEPTANCE

GOST 10632-77 Page, 5

3.1. Plates are presented for acceptance in batches. A batch is the number of plates of the same brand, group, grade and size, drawn up with one quality document.

3.2. To check the appearance and size, 10% of the slabs are taken from the batch, but not less than 20 pieces. For physical and mechanical tests select 1% of the plates from the batch, but not less than 3 pieces, in accordance with the requirements of GOST 10633-78.

H. "H. The results of inspection and testing are considered final and apply to the entire batch.

3.4. Acceptance of slabs by quantity should be carried out in square meters. The area of ​​one slab is determined with an error of no more than 0.01 m 2.

4. TEST METHODS

4.1. The thickness of the slabs is measured at a distance of 25 mm from the edge of the slab with an error of not more than 0.1 mm at six points indicated in the drawing.

4.2. The moisture and density of the slabs is determined according to GOST 10634-78.

4.3. The water absorption of the slabs is determined according to GOST 10634-78.

4.4. Swelling in thickness is determined according to GOST 10634-78.

4.5. The ultimate tensile strength perpendicular to the slab layer is determined according to GOST 10636-78.

4.6. The ultimate strength in static bending is determined in accordance with GOST 10635-78.

P. 6 tea imi-n

4.7. The hardness of the plates is determined according to GOST 11843-76.

4.8. The parameter of the surface roughness of the slabs is determined according to GOST 156112-78, profilographs-profilometers or according to standards approved in the prescribed manner.

4.9. Each tested sample must meet the requirements of table. 3.

4.10. The amount of chemicals released from the finished chipboard, as well as the frequency of control, are determined by the sanitary supervision authorities in accordance with the current guidelines approved by the USSR Ministry of Health.

4.11. The length and width of the slabs are measured parallel to the edge at a distance of 25 mm from it with a metal measuring tape in accordance with GOST 7502-69.

4.12. The appearance of the slabs is controlled visually.

To control the number of inclusions of bark particles, a section of the slab bed with the largest number of inclusions is selected.

5. MARKING, TRANSPORTATION AND STORAGE

5.1. A clear marking is applied to the longitudinal edge of the slab, containing the designation, group, grade, thickness of the slab, the name or trademark of the manufacturer, the designation of this standard, and the date of issue of the slabs. When plates are supplied for export, marking is applied by agreement with foreign trade associations.

On the plates, which in the established manner have been awarded the State Quality Mark, instead of the grade, the image of the Quality Mark is applied in accordance with GOST, 1.9-67.

5.2. Each batch of boards must be accompanied by a document certifying its quality and containing:

the name of the organization that includes the manufacturer;

the name of the manufacturer, its trademark and address;

designation and group of plates;

type of slabs and sizes;

number of plates in a batch;

the date of manufacture of the plates and the batch number;

test results;

designation of this standard.

5.3. Plates should be transported in clean, dry vehicles with mandatory protection from atmospheric precipitation and mechanical damage.

GOST 10632-77 pp. 7

5.4. Plates should be stored in dry, closed rooms in stacks laid horizontally on level platforms.

5.5. When delivered for export, the plates must be packed in accordance with the purchase orders of foreign trade associations.

Fields of application of particle boards

		Areas of use
	in the furniture industry	in construction	in other sectors of the national economy	Types of cladding, finishing
	The elements		Cases, panels and other parts in radio and instrument engineering	Films based on thermosetting polymers, films based on thermoplastic polymers and paints and varnishes
	The elements	Panels, building structures Temporary structures	Housings of devices, machines Containers (except food), containers, racks	Veneer, varnishes, decorative papery clean plastic Without cladding
		Structural elements of floors, roofs, wall panels, mezzanines, * window sills and other load-bearing structural elements	Details of bodies of vans, partitions of wagons and others	Veneer, decorative laminated plastic, linoleum, etc. Without cladding

APPENDIX 2 Reference

Physical and mechanical indicators of particle boards (approximate, not standardized)

P. a GOST 10632-77

Editor R. G. Goverdovskaya Technical editor F. I. Lisovskiy Proofreader M. G, Bayrashevskaya

Rented at nab. 07.06.79 Sign. in print. 07.19.79 0.75 p. L. 0.52 sch.-ed. l. Shooting gallery. 8000 Price 3 kopecks.

Order "Sign of Honor" Standards Publishing House, Moscow, D-557, Novopresnensky per., 3. Vilnius Printing House Standards Publishing House, st. Mindaugo, 12/14. Zach. 2679

	Grades and groups of plates
Indicator name
Modulus of elasticity in static bending, MPa (kgf / cm 2)		1770-3920 (18000-40000)
Specific resistance to pulling out nails MPa (kgf / cm 2):

GOST R 52078-2003

UDC 691.11-431: 006.354 Group K23

STATE STANDARD OF THE RUSSIAN FEDERATION

WOOD CHIPS BOARDS COATED WITH FILMS BASED ON THERMOREACTIVE POLYMERS

Technicalconditions

Wood particle boards, laminated with paper impregnated with thermosetting resins

OKS 79.060.20

Date of introduction 2004—01—01

Foreword

1 DEVELOPED by the State Unitary Enterprise "Research and Design Institute of the Wood Board Industry"

INTRODUCED by the Technical Committee for Standardization TC 121 "Wood Boards"

3 INTRODUCED FOR THE FIRST TIME

1 area of ​​use

This standard applies to particle boards lined with films based on thermosetting polymers (hereinafter - boards) and intended for the production of furniture and other consumer goods, use as structural finishing materials in construction under conditions protected from moisture, in mechanical engineering and radio equipment. ...

The provisions of this standard apply to plates produced and used by enterprises (organizations) of any form of ownership, as well as individual manufacturers.

GOST 12.1.004—91 Occupational safety standards system. Fire safety. General requirements

GOST 12.3.042—88 Occupational safety standards system. Woodworking production. General safety requirements

GOST 12.4.009—83 Occupational safety standards system. Fire fighting equipment for the protection of objects. The main types. Accommodation and maintenance

GOST 12.4.011—89 Occupational safety standards system. Protective equipment for workers. General requirements and classification

GOST 61—75 Acetic acid. Technical conditions

GOST 577—68 Dial indicators with a graduation of 0.01 mm. Technical conditions

GOST 2603-79 Acetone. Technical conditions

GOST 2718—74 Getinaks electrical sheet. Technical conditions

GOST 2910—74 Electrotechnical sheet textolite. Technical conditions

GOST 3560—73 Steel packing tape. Technical conditions

GOST 3749-77 Squares testing 90 °. Technical conditions. Angle tolerances

GOST 6709-72 Distilled water. Technical conditions

GOST 7502—98 Metal measuring tapes. Technical conditions

GOST 8026—92 Calibration rulers. Technical conditions

GOST 9784—75 Organic glass for lighting engineering sheet

GOST 10632-89 Chipboards. Technical conditions

GOST 10634-88 Chipboards. Methods for determining physical properties

GOST 10635-88 Chipboards. Methods for determining the ultimate strength and modulus of elasticity in bending

GOST 10636-90 Chipboards. Method for determining the tensile strength perpendicular to the plate face

GOST 10905—86 Testing and marking plates. Technical conditions

GOST 11358—89 Indicator thickness gauges and wall gauges with divisions of 0.01 and 0.1 mm. Technical conditions

GOST 14192—96 Marking of goods

GOST 14705—83 Submersible household electric boilers. Technical conditions

GOST 14919—83 Electric stoves, electric stoves and electric ovens for household use. General specifications

GOST 18321-73 Statistical quality control. Methods for random sampling of piece products

GOST 19720—74 Parts and products made of wood and wood materials. Method for determining the resistance of paint coatings to variable temperatures

GOST 20400—80 Furniture production products. Terms and Definitions

GOST 23234-78 Chipboards. Method for determining the resistivity at normal tear off of the outer layer

GOST 23683—89 Solid petroleum paraffins. Technical conditions

GOST 24053—80 Chipboards. Furniture details. Warping method

GOST 25336—82 Laboratory glassware and equipment. Technical conditions

GOST 25706—83 Magnifiers. Types, basic parameters. General technical requirements

GOST 27326-87 Parts and products made of wood and wood materials. Methods for determining the hardness of the protection of o-decorative coatings by scratching

GOST 27627—88 Parts and products made of wood and wood materials. Method for determining the resistance of protective and decorative coatings to staining

GOST 27680—88 Particle boards and wood fiber boards. Dimension and shape control methods

GOST 27820—88 Parts and products made of wood and wood materials. Method for determining the abrasion resistance of protective and decorative coatings

GOST 28498-90 Liquid glass thermometers. General technical requirements. Test methods.

GOST 30255-95 Furniture, wood and polymer materials. Method for determining the release of formaldehyde and other harmful volatile chemicals in climatic chambers

GOST R 50779.71—99 Statistical methods. Sampling procedures on an alternative basis. Part I. Plans for the sampling of consecutive lots based on an acceptable level of quality

3 Dimensions and classification

3.1 The nominal dimensions of the slabs must correspond to those indicated in table 1.

Table 1

In millimeters

Nominal size	Limit deviation	Nominal size	Limit deviation	Nominal size	Limit deviation
				From 8 to 38 incl. with gradation in 1 mm
* Both within one slab and between slabs. Note - By agreement with the consumer, the slabs can be of other sizes.

3.2 Classification

3.2.1 Plates according to their physical and mechanical properties are divided into three quality groups - A, B, U (table 2). The group Y includes plates with improved performance properties.

3.2.2 Depending on the indicators of the appearance of the coating, the slabs are divided into two classes (Table 3).

3.2.3 Plates can have surfaces of different coating classes on the front and back faces.

At the request of the consumer, the boards can have one lined face for further coating of the unlined face at the customer's place with other materials.

3.2.4 According to the degree of gloss, coatings are divided into glossy (G) and matte (M).

3.2.5 By the type of printing, coatings are divided into one-color (Ots) and with a printed pattern (Pr).

3.2.6 Depending on the texture, the surface of the coating is subdivided into smooth (Gl) and embossed (P).

3.2.7 The characteristics of the slab coatings specified in 3.2.4-3.2.6 are established in the consumer's specification in accordance with the supply contract.

3.2.8 The appearance of the coating, the type of pattern, if any, color, imitation of the texture and type of wood, the degree of gloss, surface texture must correspond to standard samples approved in the prescribed manner.

3.2.9 The conventional designation of the plates should consist of the designation of the coating (coating class, gloss degree, type of printing, surface texture, color and pattern index), quality group and the number of this standard.

Classes of coverage are denoted fractionally, where the numerator indicates the class of coverage of the front surface, and in the denominator - the class of coverage of the back surface. For slabs with one lined face, the coating class is denoted fractionally with a dash in the denominator.

An example of the designation of boards made of chipboards, lined with paper impregnated with thermosetting polymers, with a 1st class coating on the front face and 2nd class on the back face (1/2), with a matte (M), one-color (Ots) coating , with a smooth surface texture (Gl), quality group A:

Slab 1/2 M-Ots-Gl-A - GOST R 52078-2003

The same for boards lined with paper impregnated with thermosetting polymers, with a class 20 coating on both faces, for glossy (G), with a printed pattern (Pr) coatings of quality group A:

Plate 2/2-G-Pr-R-A - GOST R 52078-2003

4 Technical requirements

4.1 Features

4.1.1 The deviation from the straightness of the edges shall not be more than 2.0 mm per one running meter.

4.1.2 The deviation from the perpendicularity of the edges of the slabs should not be more than 2 mm per one running meter.

The perpendicularity of the edges can be determined by the difference in the lengths of the diagonals of the face, which should not be more than 0.2% of the length of the slab.

4.1.3 For the production of slabs, the following are used:

For groups A and B - particle board grades P-A and P-B in accordance with GOST 10632 of the first grade with a fine-structured surface, polished;

For group U - particle boards of the PA grade in accordance with GOST 10632 of the first grade with a fine-structured surface, polished:

with a density not exceeding: 720 kg / m 3 - for a thickness of 13 mm and more,

800 kg / m 3 - for thickness up to 13 mm;

swelling in thickness in 2 hours - no more than 16%.

It is allowed to use chipboards according to the normative and technical documentation, corresponding in quality to the plates of the indicated brands:

Decorative films based on thermosetting polymers according to regulatory and technical documentation.

4.2 The quality indicators of the slabs must comply with the standards specified in table 2.

table 2

Indicator name	Standard for quality groups
Acceptance indicators
Flexural strength, MPa, not less, for slabs with thickness:
from 8 to 12 mm
"13" 19 mm
"20" 30 mm
"31" 38 mm
Warpness, mm, no more:
For slabs with double-sided cladding
For slabs with one-sided cladding
Hydrothermal resistance of the coating	Slight are allowed: loss of gloss, color, manifestation of the structure of the base plate		Changes in the appearance of the coating are not allowed.
Ultimate tensile strength perpendicular to the face, MPa, not less, for slabs with thickness:
from 8 to 12 mm
"13" 19 mm
"20" 30 mm
"31" 38 mm
Resistivity at normal tear-off of the coating, MPa, not less
Periodic tests
Hardness of protective and decorative coating:
According to GOST 27326 with a load weight of 1.5 N (method 1), μm, no more
According to Appendix D, N, not less
Type tests
Resistance of the coating to high air temperatures
Thermal resistance of the coating	Changes in the appearance of the coating are not allowed, with the exception of a slight loss of gloss, color
Coating resistance to abrasion, revolutions, not less		Not standardized
Surface resistance to staining	Changing the appearance of the coating is not allowed	Slight change in appearance is allowed	Changing the appearance of the coating is not allowed
Coating resistance to variable temperatures,%, not less
Note - The indicator "hydrothermal resistance" is controlled (at the request of consumers) only for furniture items exposed to water vapor.

4.3 Requirements for the appearance of the coating by class are presented in Table 3.

A list of typical defects in the coatings of faced slabs is given in Appendix A.

Table 3

Defect name
Dents *):
Depth, mm, no more
Inclusions *):
Quantity, pcs / m 2, no more	Not allowed
The largest size on the surface, mm, no more
Silverness of pores, no more (diffuse)	Not allowed	5% surface
Quantity, pcs / m 2, no more	Not allowed
The largest size on the surface, mm, no more
Individual hair risks *) quantity, pcs / m 2, no more	Not allowed
Scratch*) :
Quantity, pcs / m 2, no more	Not allowed
Size, mm, no more
Skewed pattern	Not allowed
Non-printing of the picture	Not allowed	Minor, not spoiling the appearance is allowed
Manifestation:
Inclusions of coarse shavings, pcs / m 2, no more
The largest size on the surface, mm, no more
Waviness of chipboard	Not allowed	Allowed insignificant in the absence of silver
Brilliance	Not allowed	No more than 1% of the surface allowed
*) The total number of simultaneously present defects per square meter for class 2 coatings should not be more than 5 pcs. Notes (edit) 1 For slabs of a specific format, the number of permissible defects per actual area is calculated with integer precision. 2 Slabs with two lined faces, having defects on one of the sides that exceed those indicated in Table 3, are converted into slabs with one lined face. The grade of the slabs in this case is set according to the quality indicators of the best side. Defects on the reverse side in this case are not regulated.

4.4 Marking

Each batch (package) of boards must be accompanied by a quality document containing:

Name, trademark (if any) and location of the manufacturer;

Symbols of slabs;

Dimensions (in square meters) and number of slabs (in pieces);

The date of manufacture of the plates;

Stamp of the technical control department;

Designation of this standard.

4.5 Packaging

4.5.1 Packages are formed from slabs of the same size, coverage category, grade, pattern and color of the cladding texture.

4.5.2 Packages are formed on a pallet, as a rule, from substandard chipboard, the top of the package is also closed with a similar chipboard. The dimensions of the upper and lower cladding slabs must be no less than the dimensions of the cladding slabs.

4.5.3 The maximum height of the formed package is set based on the availability of lifting mechanisms, the carrying capacity of vehicles, but, as a rule, not more than one meter.

4.5.4 Each package must be fastened with transverse straps made of steel packaging tape at least 16 mm wide and at least 0.5 mm thick in accordance with GOST 3560. The number of straps must be at least two (with a package height of up to 500 mm) and up to six ( with a bag height of more than 500 mm).

By agreement with the consumer, another type of packaging is allowed.

5 Safety requirements and environmental protection

The operation of board products is possible only if there is a sanitary and epidemiological conclusion on the products, issued by the bodies of the State Sanitary and Epidemiological Supervision of the Ministry of Health of Russia.

5.2 Synthetic materials for the manufacture of plates can be used only if there is a sanitary and epidemiological conclusion issued by the bodies of the State Sanitary and Epidemiological Supervision of the Ministry of Health of Russia.

5.4 The production of slabs must meet the safety requirements established by GOST 12.1.014 and GOST 12.3.042.

5.5 Persons associated with the manufacture of plates must be provided with personal protective equipment in accordance with GOST 12.4.011 (special clothing, goggles, for the protection of hands - combined gloves).

5.6 Ensuring fire safety must comply with the requirements of GOST 12.1.004. Types of fire fighting equipment - according to GOST 12.4.009.

6 Acceptance rules

6.1 Plates are presented for acceptance in lots. A batch is considered to be the number of plates of the same size, one quality group and coating class, manufactured according to one technological mode in a limited period of time, and issued with one quality document.

6.2 At the manufacturing stage in the sorting area of ​​the manufacturer, each board is inspected to determine the coating grade.

Overhangs of the coating are allowed along the perimeter of the slab, as well as a strip with a width of no more than 20 mm within the slab format with coating defects, for example, pattern defects, edge chips, tears and delamination of the coating, underpressing, chipping of corners.

Plates can be made without overhangs using a facing film with a width less than the width of the facing board by no more than 12 mm.

6.3 Selection of slabs for control and testing is carried out by random selection "blind" in accordance with GOST 18321.

6.4 To control the length, width, thickness, perpendicularity of the edges, as well as the appearance of the slabs, statistical acceptance control is used on an alternative basis in accordance with GOST R 50779.71.

The sample size is determined in accordance with the requirements of Table 4.

Table 4

Lot size, pcs.	Sample size when checking, pcs.		The number of suitable plates from the sample volume at which the batch is accepted during inspection, pcs., Not less
		the appearance of the coating	length, width, perpendicularity of edges	the appearance of the coating
From 501 "1200

6.5. For quality control, at least three slabs are selected.

6.6 To assess the quality of a batch of slabs in terms of: ultimate strength in bending, ultimate tensile strength perpendicular to the plate layer, resistivity at normal tear-off of the coating, hardness of protective and decorative coating, coating resistance to abrasion - calculate the sample arithmetic mean value Xi for all tested samples according to the formula

where Xij- value of the sample indicator j-th sample, i th slab sample from n- stoves;

m- the number of samples taken from each plate.

6.7 The lot is considered to comply with the requirements of this standard and is accepted if:

In terms of: warping, ultimate strength in bending, ultimate tensile strength perpendicular to the plate layer and resistivity at normal tear-off of the coating, hardness of protective and decorative coating and coating resistance to abrasion, the arithmetic mean value for all samples is not more (less) than the norm specified in table 2;

In terms of: hydrothermal resistance of the coating, resistance of the coating to elevated air temperatures, surface resistance to staining, thermal resistance of the coating and resistance of the coating to variable temperatures - each sample meets the requirements of Table 1;

The results of control of dimensions, straightness and appearance of the coating meet the requirements of Table 4.

6.8 Periodically monitored indicator

The hardness of the protective and decorative coating is determined at least once a week, as well as when changes in the technological processes of production or when changing the materials used.

The results apply to the entire volume of products manufactured in the period until the next periodic tests.

6.9 Indicators for type tests: resistance of the coating to elevated air temperature, thermal resistance of the coating, resistance of the coating to abrasion, resistance of the coating to exposure to variable temperatures, resistance of the coating to staining are determined when changing in production processes or when changing the materials used.

7 Control methods

7.1 The appearance of the slabs is checked visually without the use of magnifying devices at an illumination of not less than 1000 to 5000 lux at a distance of approximately (300-500) mm from the surface at an angle of 30 ° to 60 °. The light source can be either diffused daylight or diffused artificial light.

7.2 The class of coverage is determined in accordance with the requirements of Table 3.

7.3 Haze and gloss of coatings are determined visually by comparison with an approved reference sample.

7.4 The dimensions of the plates are checked with limiting gauges and universal measuring instruments that ensure the required accuracy.

7.5 The thickness of the slabs is checked with a thickness gauge in accordance with GOST 11358 or another measuring instrument providing a measurement error of no more than ± 0.1 mm.

The measurement is carried out at a distance of at least 25 mm from the edge of the slab at six points: at two points from each long side of the slab with a distance between the measurement points of about 1/3 of the slab's length and one point in the middle of the short sides of the slab.

7.6 The deviation from the straightness of the edges is determined in accordance with GOST 27680 using a device or a straightedge in accordance with GOST 8026 1000 mm long not less than the second accuracy class and a set of probes.

7.7 The deviation of the perpendicularity of adjacent edges is determined in accordance with GOST 27680 using a square in accordance with GOST 3749 and a set of probes or by the difference in the length of the diagonals along the face, measured with a metal tape with a scale of 1 mm in accordance with GOST 7502.

In arbitration testing of products, the deviation of the perpendicularity of adjacent edges is determined in accordance with GOST 27680.

7.8 Sampling for determination of quality parameters and general test requirements

7.8.1 From each sample plate, in accordance with 6.3, at a distance of at least 150 mm from the transverse edge, cut a strip with a width of at least 700 mm, from which, according to the nomenclature of controlled indicators in Table 2, samples are cut out in an amount not less than indicated in Table 5.

Table 5

Test type	Number of samples, pcs.
Determination of ultimate strength in bending
Determination of warping
Determination of the hydrothermal resistance of the coating
Determination of the tensile strength perpendicular to the plate face
Determination of resistivity at normal separation
Hardness of protective and decorative coating
Determination of resistance to high air temperature
Determination of the thermal resistance of the coating
Determination of coating resistance to abrasion
Determination of surface resistance to staining
Determination of the resistance of the coating to the effects of variable temperatures

7.8.2 When cutting out samples, it is necessary to take into account the following from each slab included in the sample:

Samples for each type of test must be cut from the extreme and middle parts of the strip;

The distance between the samples for determining the same indicator should be at least 50 mm;

The faces and edges of the samples should be mutually perpendicular, and the edges should be parallel in pairs;

The sides of the samples should be parallel to the sides of the slab.

7.8.3 Deviations in the dimensions of the samples that are not included in the formula for calculating the test results should not exceed ± 3 mm.

7.8.4 Testing of samples is carried out not earlier than 24 hours after the slabs are lined on the line, after keeping them under normal conditions.

7.9 The dimensions of the indentations (recesses) on the surface of the slab are determined using a dial indicator of the ICh-10 brand in accordance with GOST 577, fixed in a metal U-shaped bracket with cylindrical supporting surfaces with a radius of (5 ± 1) mm and a span between the supports of 60-100 mm ...

The indicator scale is set to zero position when the bracket is installed on a straightedge in accordance with GOST 8026 or on a surface plate in accordance with GOST 10905. The stroke of the rod in both directions from the reference plane must be at least 2 mm.

7.10 The density and thickness swelling of the base plate is determined in accordance with GOST 10634.

7.11 Specific resistance to normal separation of the outer layer of the base plate is determined in accordance with GOST 23234.

7.12 Ultimate bending strength is determined in accordance with GOST 10635.

7.13 Warpness is determined in accordance with GOST 24053.

7.14 The hydrothermal resistance of the coating is determined according to Appendix B.

7.15 Ultimate tensile strength perpendicular to the plate face is determined in accordance with GOST 10636.

7.16 Resistivity at normal tear-off of the coating is determined in accordance with GOST 23234.

7.17 The resistance of the coating to elevated air temperatures is determined in accordance with Appendix B.

7.18 The thermal resistance of the coating is determined according to Appendix D.

7.19 The hardness of the protective and decorative coating is determined with a load mass of 1.5 N according to GOST 27326 (method T) or according to Appendix D.

During control tests of products, the indicator "hardness of protective and decorative coating" is determined in accordance with GOST 27326.

7.20 The resistance of the coating to abrasion is determined in accordance with GOST 27820 (method for determining the number of grinding) with a frequency of assessing the degree of abrasion of the test specimen equal to 10 revolutions.

The number of revolutions of the turntable is taken as the result of determining the degree of abrasion of the sample n determined by the formula

where IP- the number of revolutions corresponding to the initial point of coating abrasion;

FP- the number of revolutions corresponding to the end point of abrasion of the coating (the moment of removal of more than 95% of the pattern).

7.21 The resistance of the surface to staining is determined according to GOST 27627 using reagents and the time of their exposure to the test coatings specified in Table 6.

Table 6

Name of exposure reagents	Time of action of reagents
Distilled water according to GOST 6709
Chemical solvent liquids:
Acetone according to GOST 2603
Ethyl alcohol with a mass fraction of 96%
Food products:
Acetic acid in accordance with GOST 61 (solution with a mass fraction of 10%)
Coffee (12 g per 100 cm 3)
Vegetable oil
Disinfectant:
chloramine B

7.22 The resistance of the coating to variable temperatures is determined in accordance with GOST 19720.

7.23 The levels of volatile chemicals released during the operation of the plates into the air of residential premises are determined in accordance with GOST 30255 and regulatory documents approved by the Ministry of Health of Russia.

8 Transport and storage

8.1 Plates are transported by all types of transport in accordance with the Rules for the carriage of goods in force for this type of transport with mandatory protection from atmospheric precipitation and mechanical damage.

8.2 Transport marking - in accordance with GOST 14192.

8.3 Plates should be stored in dry, clean, closed rooms at a temperature not lower than 5 ° С and a relative air humidity not higher than 65%.

8.4 Plates should be stored in a horizontal position in stacks, laid on level substitute places.

The height of the stack should be no more than 3300 mm for bundles of plates packed with steel packing tape, separated by spacer bars with a cross-sectional area of ​​at least (80x80) mm and a length of at least the width of the plate, spaced no more than 700 - 800 mm from each other ... The height of the stack for unpacked bundles of boards should not exceed 1700 mm. The distance from the extreme spacer bars to the ends of the slab should not exceed 250 mm.

Other storage conditions for the plates are allowed, provided that the necessary labor safety conditions approved by the head of the enterprise are ensured.

9 Manufacturer's warranty

9.1 The manufacturer guarantees that the boards comply with the requirements of this standard, provided that the storage and transportation conditions are observed within 12 months from the date of manufacture.

APPENDIX A

(required)

Typical surface defects of faced slabs

Table A.1

	Definition
Dent on the surface	According to GOST 20400, (6.1)
Inclusions	According to GOST 20400, (6.13)
	According to GOST 20400, (6.21)
	According to GOST 20400, (6.24)
Scratch	According to GOST 20400, (6.25)
Skewed pattern	According to GOST 20400, (6.30)
Pore ​​silvery	Whitening of the surface of the part due to insufficient spreading of the resin in the surface layer of the film
Non-printing of the picture	A separate area of ​​the printed pattern on the part, which differs in color and texture from the identical pattern of the coating
The manifestation of the structure of the chipboard (substrate)	The appearance of shavings of the outer layer of the chipboard on the surface of the board
Surface waviness of chipboard	It is allowed to use other equipment providing the required measurement error. B.2 Sampling Sampling is carried out in accordance with 7.8 of this standard. Samples should be in the form of a square with a side of 75 mm. It is allowed to use samples with dimensions 100x100 mm. B.3 Testing The sample is placed on a flask with boiling water and exposed for 1 hour to the vapor of boiling water, after which the sample is dried with filter paper. The samples are examined at room temperature immediately after testing, the following changes on the surface are noted: the presence of cracks (using a magnifying glass), swelling, delamination, loss of gloss, color (with the naked eye). B.4 Processing of test results If changes in the appearance of the coating and delamination did not occur or the indicated changes in appearance (in the absence of delamination) disappeared within 24 hours, then the test results are considered positive. APPENDIX B (required) Determination of the resistance of surfaces to high air temperatures B.1 Apparatus B.1.1 The following apparatus is used for the test: oven, providing temperature maintenance (70 ± 5) ° С. B.2 Sampling Sampling is carried out in accordance with 7.8 of this standard. Samples should be in the form of a square with a side of 250 mm. B.3 Testing The sharp edges of the samples are cleaned with an abrasive paper so that there are no chips of the coating. The samples are placed in an oven at a temperature of (70 ± 5) ° С for 24 h. After the test, the samples are kept for 24 h at (20 ± 5) ° C and the decorative surface is examined with the naked eye in order to detect cracks on the surface. Inspection of the samples is carried out at an angle of 20 ° - 30 ° to the surface plane from a distance of 250 mm. B.4 Expression of test results In the absence of cracks on the coatings, the samples are considered to have passed the test and the result is extended to the entire batch of plates. APPENDIX D (required) Determination of the thermal resistance of the surface D.1 Apparatus, materials The following equipment and materials are used for testing: A cylindrical aluminum glass with a flat bottom inner diameter (100 ± 5) mm, height (115 ± 1.5) mm and bottom thickness (2.5 ± 0.5) mm; Laboratory mercury glass thermometer up to 250 ° С in accordance with GOST 28498; A plate of getinax in accordance with GOST 2718, textolite in accordance with GOST 2910 or other heat-resistant material with dimensions (150 x 150 x 18) mm with holes for an electric boiler and a thermometer; Oil wax or paraffin in accordance with GOST 23683; Electric boilers up to 300 W in accordance with GOST 14705. D.2 Sampling Sampling is carried out in accordance with 7.8 of this standard. Samples should be in the form of a square with a side of 250 mm. D.3 Testing About 400 g of wax (paraffin) is placed in an aluminum glass, covered with a plate, heated with an electric boiler to 180 ° C. The temperature is controlled with a mercury thermometer at a distance of at least 6 mm from the bottom of the beaker. When the temperature is higher than the required one, the electric boiler is turned off, the glass is placed on asbestos and the temperature of the wax (paraffin) is brought to the required one with an accuracy of ± 1 ° C. A glass with heated wax (paraffin) is placed on the test specimen. After 20 minutes, during which the wax (paraffin) is not heated, the glass is removed. 30 minutes after the test, inspect the surface of the sample for cracks (with a magnifying glass), blistering and loss of gloss (with the naked eye). D.4 Processing of test results If there is no change in the appearance of the coating, with the exception of a slight loss of gloss, color, then the test results are considered positive and apply to the entire batch of plates. Determination of the hardness of protective and decorative coatings (harmonized with ISO 4586-2-91 and EN 438-2-97 in terms of the method for the determination of scratch resistance) E.1 Apparatus The following apparatus is used for the test: installation for the population of scratches (see figure E.1) type 413 / E of the firm "Erichsen", consisting of the following parts: Devices for determining the horizontal plane; Backing disc A to accommodate the test specimen, freely rotating without play along the vertical axis, preferably by means of a motor. The number of revolutions (5 ± 1) rpm. Uniform rotation of the platter manually is allowed; Lever B moving the diamond head holder mounted on a ball bearing with a horizontal axis. The height of the axle is adjusted so that the lever is perfectly horizontal when the diamond head is resting on the test piece; Devices for changing the load on the diamond head with an accuracy of ± 0.1 N with weight V; Diamond hemispherical scratching head D radius (0.090 ± 0.003) mm, located in a cone with an angle of 90 ° ± 1 ° (see Figure E.2). The head mounts in front of the holder with the flat side on the base of the retention cavity. A diamond is used that is certified by the manufacturer in the metrology authorities and calibrated in accordance with D.3 of this Appendix; Clamping disc G holding the test specimen in a flat position; An observation chamber with a matte black surface and a light source mounted on top. During the tests, the sample is 600 mm vertically from the light source. A hole in the front wall of the chamber allows viewing the test specimen from different angles at a distance of (400 ± 10) mm. The inspection chamber is shown in Figure E.3. The light source is a 100 W matt lamp installed in a white reflector 140 mm in diameter, which creates an illumination of 800-1000 lx on the sample surface; Surveillance masks (see Figure E.4) made of a flat, opaque material such as a sheet of metal or plastic. E.2 Sampling Sampling is carried out in accordance with 7.8 of this standard. Samples should be in the form of a square with a side of 100 mm; there should be a 6.5 mm diameter hole in the center of each specimen. Conditioning of samples is in accordance with GOST 27820. E.3 Calibration of the diamond head For calibration, use a disk cut from organic lighting sheet glass in accordance with GOST 9784 (polymethyl methacrylate) with a minimum thickness of 3 mm (preferably 4 mm). Secure the disc to the platter. Increase the load from 1.5 to 4 N in 0.5 N increments, rotating the disk at a speed of (5 ± 1) rpm. High molecular weight cast polymethyl methacrylate dried in a vacuum for 24 h at a temperature of 80 ° C should have a heat resistance according to VIKA of at least 112 ° C. One complete revolution is performed at each load. The depth of penetration is measured at four points 90 ° apart on the same scratch and the arithmetic mean of the depth is calculated for each load. Diamond heads penetrating at a load of 4.0 N to a depth of 4 microns or more are considered unsuitable. For testing, use diamond heads with a penetration depth corresponding to the limiting curves (Figure E.5). Diamond heads with uneven curvature are discarded. Diamond heads are checked after every 1000 tests. E.4 Testing Make sure the test rig is horizontal. Adjust the height of the arm B so that it is positioned horizontally when the diamond head comes into contact with the test specimen. Start the test with a load of 5.0 N. Move the lever B into an upright position. Fix the sample with a clamping disk G so that the sample does not slip during testing. Lower the lever B and place the diamond head on the specimen avoiding impact. Turn the platter one turn counterclockwise at a rotation speed of (5 ± 1) rpm. Stop the platter and check the sample. If at a load of 5.0 N a continuous trace remains visible to the eye, continue the test, drawing concentric circles at least 2.0 mm apart from the previous one. The load is reduced to 2.0 N in 0.5 N steps. If a continuous trace remains at a load of 2.0 N, the test is continued, reducing the load in steps of 0.20 N; at a load less than 1.0 N, the step of decreasing the load is 0.1 N. If the number of scratches is too great to determine when the test ends, continue testing on a second sample taken from the same sheet. Before the final check, place the scratched sample for 24 h under the conditioning conditions specified in D.2. Clean the surface of the test specimen. Place the mask on the sample surface and place them at the inspection site in the observation chamber. One of the holes in the mask is set to the 12 o'clock position. Tilt at various angles without rotating the specimen or mask and view all holes with the naked eye. NOTE The minimum load that forms a continuous track is that at which the scratch is visible in all eight slots of the mask. The imaginary connection of the head marks should be avoided. E.5 Expression of results Record the value of the force producing a continuous scratch visible to the naked eye after 24 h exposure under the conditions specified in E.2. An example of test results with a load of 2.5 N is shown in Figure E.4. In cases of controversy, the sample is examined by three observers and reported independently. The arithmetic mean of three observations is taken as the final result. E.6 Report on the results of determining the hardness of the protective and decorative coating The report on the results of determining the hardness of the protective and decorative coating includes the following information: Date of testing; Figure E.5 - Scattering area when calibrating diamond heads APPENDIX E (reference) Bibliography GN 2.1.6.695—98 Atmospheric air of closed premises, sanitary protection of air. Maximum permissible concentration (MPE) of pollutants in the ambient air of populated areas GN 2.1.6.696—98 Approximate safe exposure levels (TSEL) of pollutants in the air of populated areas

UDC 674.817

Group F-15

WOOD CHIP BOARDS COATED WITH FILMS
BASED ON THERMOREACTIVE POLYMERS

TECHNICAL CONDITIONS

TU 13-0260215-02-87 (introduced for the first time)

These specifications apply to chipboards lined with films based on thermosetting polymers, intended for the manufacture of certain types of special furniture and other consumer goods, use as construction and finishing materials in construction, for amateur creativity of the population, etc.

1. TECHNICAL REQUIREMENTS

1.1. Basic types and sizes.

1.1.1. For the manufacture of lined slabs, the following are used:

• particle boards of grades П-А and П-Б according to GOST 10632-89 or particle boards according to the current normative and technical documentation, corresponding to the main quality indicators of the plates of the indicated brands;
• paper-resin films based on melamine-formaldehyde, urea-formaldehyde resins or mixtures thereof; films are used both with a pattern on the surface and smooth without a pattern.

1.1.2. The materials used for the manufacture of plates must be approved for use by the USSR Ministry of Health.
The content of harmful chemicals emitted by stoves in industrial premises should not exceed the maximum permissible concentrations approved by the USSR Ministry of Health for the air in the working area of ​​industrial premises.
Under operating conditions, the amount of chemicals released by the stoves should not exceed the maximum permissible concentrations in the environment approved by the USSR Ministry of Health for atmospheric air.

1.1.3. The dimensions of the slabs must correspond to those indicated in table 1.

Table 1.

Note: it is allowed, in agreement with the consumer, to produce plates of other sizes not indicated in table. 1.

1.1.4. Coatings, according to OST 13-27-82, are subdivided in appearance into one-color (OC) and with a printed pattern (PR); according to the degree of gloss - to glossy (G) and matte (M).
Depending on the presence of defects in the coating, there are 1 and 2 grades.

1.1.5. Depending on the purpose of the slab in the following versions:
with one-sided facing (O) and double-sided (D). For double-sided veneering, the quality of the coating is determined separately.

1.1.6. The conventional designation of the plates must consist of the designation of the design of the plates, designations of the characteristics of the coating (appearance, degree of gloss), the formaldehyde emission class of the plate-base and the designation of these technical conditions.
For slabs with different coating quality on the front side and back surfaces, the quality characteristics of the coating are denoted by a fraction, where the type of coating of the front surface is put in the numerator, and the type of coating on the back surface is put in the denominator.
An example of the designation of boards lined with films based on thermosetting polymers with a printed pattern, with double-sided lining, matte finish, with the quality of the front surface grade 1 and reverse grade 2, made of particle boards of formaldehyde emission class E 2:
Plates PR DM 1/2 E 2 TU 13-0260215-02-87

1.2. Characteristics of the slabs.

1.2.1. The color and pattern of the lined coating or its absence must correspond to the samples agreed with the consumer.

1.2.2. Limit deviations of the dimensions of the plates should not exceed those indicated in table. 1.

1.2.3. The values ​​of the indicators of the physical and mechanical properties of the plates must correspond to those indicated in table. 2.

table 2

Indicator name	Norm
Flexural strength, MPa, not less for thicknesses 10.5 12.5 for thicknesses 13.5 19.5 *) ultimate tensile strength perpendicular to the plate face, MPa, not less *) specific resistance to normal separation of the coating, MPa, not less *) hardness of protective and decorative coating, microns, no more *) resistance to high air temperature *) thermal resistance **) resistance to pollution by substances of economic and domestic use **) resistance to variable temperatures	14,0 13,0 0,50 No change allowed the appearance of the coating Minor loss allowed gloss or appearance of the coating No change allowed appearance Frost resistant
Notes: 1. Indicators marked with *) are determined periodically - once a week. 2. Indicators marked with **) are for reference only. 3. The revetted slabs presented for acceptance are subject to the significance of the results of physical and mechanical tests, determined for furniture parts from veneered slabs made during the same period.

1.2.4. The surface quality of the slabs must comply with the standards specified in table 3.

Table 3

Defect name	Permissible values ​​of defects
	1st grade	2nd grade
Scratches or risks	Scratches or scratches are not allowed with a width of more than 0.2 mm and a length of more than 50 mm in an amount of more than 5 pcs. on an area of ​​1 m 2	Scratches or scratches are not allowed with a width of more than 0.4 mm and a length of more than 500 mm in an amount of more than 5 pcs. on an area of ​​1 m 2
	Not allowed with a depth of more than 0.2 mm and a width of more than 15 mm in an amount of more than 5 pieces. on an area of ​​1 m 2	Not allowed with a depth of more than 0.4 mm and a width of more than 50 mm in an amount of more than 5 pieces. on an area of ​​1 m 2
Stains (including whitish)	Not allowed with a total area of ​​more than 5% of the slab surface	Not allowed with a total area of ​​more than 15% of the slab surface
Film shift, coating cracks, pattern and film defects, coating chips and delamination, film overhangs	Not allowed except for a zone 20 mm wide around the perimeter of the slab
Incorporating secondary laminate	Not allowed with a length of more than 30 mm and a width of more than 2 mm in an amount of more than 1 piece. on the slab area.	Not allowed with a length of more than 50 mm and a width of more than 5 mm in an amount of more than 3 pieces. on the slab area.
Note: Plates with double-sided facing, having defects on one of the sides that exceed the indication in table 3, are transferred to the section of plates with one-sided facing, the grade of the plates in this case is set according to the quality indicators of the best side; defects on the reverse side in this case are not regulated.

1.2.5. The version of the slabs, the characteristics of the coating and its grade are established by the consumer's specification, agreed with the manufacturer.

2. RULES OF ACCEPTANCE

2.1. Plates are presented for acceptance in batches. A batch is considered to be the number of plates of one design, one pattern, color, quality, grade, one class of formaldehyde emission of the base plate, as well as the same sizes, manufactured according to the same technological mode and issued with one document of quality, containing:

• The name of the organization that includes the manufacturer;
• The name of the manufacturer., Its trademark (if any) and address;
• The number of plates in the batch and their total area in square meters, determined with an accuracy of 0.01 m 2;
• Date of manufacture;
• Batch number;
• Designation of these technical conditions.

2.2. Acceptance of plates is carried out by the technical control department of the manufacturer.

2.3. To check the appearance and dimensions, 1% of the slabs are selected, but not less than 20 pieces.
For physical and mechanical tests, select 0.5% of the plates from the batch, but not less than 3 pieces.

2.4. A batch of plates is considered to meet the requirements of these technical specifications and is accepted if:

• the arithmetic mean of the test results of physical and mechanical indicators for each plate or the test value of each sample (in the case when one sample is taken from the plate), meets the requirements of table. 2;
• the results of the control of the geometric parameters and the appearance of each slab comply with the requirements of paragraphs. 1.1.3; 1.2.4.

The results of the control and testing of the sample are considered final and apply to the entire lot.

2.5. The consumer has the right to carry out a control check of the quality of the plates, observing the rules of acceptance and test methods established by these specifications.

2.6. Acceptance of slabs by quantity is carried out in square meters with an accuracy of 1.12 m 2.

3. METHODS OF CONTROL AND TESTS.

3.1. The appearance of the plates is checked visually, without the use of magnifying optical means, by comparing them with samples agreed between the manufacturer and the consumer.
Sample sizes (200 x 300) mm.

3.2. The length, width and thickness of the slabs are controlled in accordance with GOST 10632-77.

3.3. General rules for selection, preparation and testing in accordance with GOST 10633-89.

3.4. The number and sizes of samples taken from each slab included in the sample for physical and mechanical tests are shown in Table 5.

Table 5.

Test name	Number of samples	Sample sizes, mm
Determination of ultimate strength in bending		According to GOST 10635-78
Determination of the tensile strength perpendicular to the plate face		According to GOST 10635-78
Determination of resistivity to normal tear-off of the coating
Determination of the hardness of protective and decorative coatings
Determination of resistance to high air temperature
Determination of hydrothermal resistance		According to GOST 9590-76
Determination of thermal resistance		According to GOST 9590-76
Determination of resistance to pollution by substances of economic and domestic use		According to GOST 9590-76
Determination of resistance to variable temperatures		According to GOST 19720-74

3.5. An example of a scheme for cutting a slab into samples for determining physical and mechanical indicators is given in the recommended Appendix No. 1.

3.6. Flexural strength is determined according to GOST 10638-88.

3.7. The ultimate tensile strength perpendicular to the slab layer is determined according to GOST 10636-78.

3.8. Resistivity to normal tear-off of the coating is determined in accordance with Appendix 3.

3.9. The hardness of the protective and decorative coating is determined according to GOST 27326-87 (method 1) with a load weight for loading the rocker arm of 150 g.

3.10. Resistance to elevated air temperature is determined in accordance with Appendix 4.

3.11. Hydrothermal resistance is determined in accordance with GOST 9590-76. It is allowed to place the sample in the flask without the device specified in clause 4.5.2. GOST 9590-76.

3.12. Thermal resistance is determined according to GOST 9590-76 at an air temperature of 180 ° C.

3.13. Resistance to pollution by household and household substances is determined according to GOST 9590-76.

3.14. Resistance to variable temperatures is determined according to GOST 19720-74.

3.15. The degree of gloss or dullness of the coating is determined according to GOST 16143-01 and by comparison with the sample according to clause 3.1.

3.16. The depth of the indentations on the coating of the slabs is determined using a dial indicator of the ICh-10 brand in accordance with GOST 577-68, fixed in a metal bracket with two flat supporting surfaces.

3.17. The area of ​​the spots on the coating is defined as the sum of the areas of the individual spots on each surface. The area of ​​the spot is determined with an accuracy of 1 cm 2 using a grid with square cells with a side of 10 mm, applied on a transparent material.

3.18. The width of the scratches and marks is determined using a screw ocular micrometer MOV-1-15 according to TU 3-3.2048-88.
It is allowed to use other devices providing an error in measuring the scratch width of no more than 0.015 mm.

3.19. To resolve controversial cases in determining the formaldehyde content of the base plate, the rules for sampling, equipment and reagents are applied, and tests are carried out and the results are processed in accordance with GOST 27678-88.
Before testing, the workpiece provided for by GOST 27678-88 (clause 1.2.) Is milled in such a way as to completely remove the coating layer and the outer layer of the slab to a depth of 1.0? 1.5 mm from each side. After that, the samples cut from the blanks are kept for at least 3 days under the conditions established by GOST 27678-88 (clause 1.3.).

4. PACKAGING

4.1. The boards are packed in accordance with the "Instruction for packing and transporting boards" of chipboard coated with films based on thermosetting polymers at the Moscow EZDP and D.

5. MARKING

5.1. During storage, a label is attached to each pack of plates containing:

• manufacturer's name or trademark;
• the name of the plates and their sizes;
• number of slabs in a pack;
• designation of these technical conditions;
• production date and shift number;
• stamp of the technical control department.

6. TRANSPORTATION AND STORAGE.

6.1. Plates are stored in bundles no more than 800 mm high. The bundles are laid horizontally on flat pallets or wooden beams-0-gaskets with a cross-section of at least 80 x 80 mm, and a length equal to or not less than the width of the plate (but not more than 200 mm).
The permissible difference in the thickness of the spacers used for one pack is 5 mm.
The spacer bars should be laid across the pack; their number is not less than 5 pieces.
The distance from the outer spacers to the ends of the pack should not be more than 400 mm.

6.2. Packs of slabs can be stacked in stacks, the height of which is determined by the height of the warehouse and the capabilities of the lifting mechanisms, while the bars - the gaskets should be placed in the same vertical planes.

6.3. The slabs are stored in closed rooms, sorted by design, surface quality and dimensions.

6.4. Plates are transported by all types of transport in accordance with the Rules for the carriage of goods in force for this type of transport, with mandatory protection from atmospheric precipitation and mechanical damage.
When transporting by rail, the placement and fastening of packs of plates is carried out only in covered vehicles in accordance with the Specifications for loading and fastening goods, approved by the Ministry of Railways.
During transportation, bundles of slabs must be secured with a rigid tie, which excludes displacement of the slabs relative to each other.
It is allowed to transport slabs in containers and transport packages in accordance with the technical documentation agreed with the relevant transport ministries.
Transport marking of packaging in accordance with GOST 14192-77.

7. SUPPLIER'S WARRANTIES.

7.1. Particle boards lined with films based on thermosetting polymers must be approved by the technical control of the manufacturer.
The manufacturer guarantees that the slabs comply with the requirements of these technical specifications, provided that the consumer observes the operating, transportation and storage conditions established by the technical specifications.

SAMPLING SCHEME FOR DETERMINATION

ACCEPTANCE AND REFERENCE INDICATORS

1 - samples for determining the ultimate tensile strength perpendicular to the face of the plate;
2 - samples for determining the resistivity to normal tear-off of the coating;
3 - samples for determining the ultimate strength in static bending;
4 - a sample for determining warping;
5 - a sample for determining the hardness of a protective and decorative coating;
6 - samples for determination of resistance to pollution;
7 - sample for determining resistance to elevated temperature;
8 - sample for determining thermal resistance;
9 - samples for determination of hydrothermal resistance;
10 - samples for determining resistance to variable temperatures.

APPENDIX 2

Mandatory

DETERMINATION OF THE SPECIFIC RESISTANCE AT

NORMAL RELEASE

1. Apparatus and materials

1.1. Testing machine in accordance with GOST 7855-84 with a load measurement error of no more than 1%
1.2. Cylindrical hollow drill according to TU 2-05-862-82 with an inner diameter of 25-30 mm.
1.3. It is allowed to use another tool to obtain a circular one with an inner diameter of 25-30 mm and a width of at least 2 mm.
1.4 Synthetic adhesive for gluing the test head to the sample surface.
1.5.Antiadhesive (a substance that is neutral to the glue used, such as paraffin, wax, universal putty, etc.).
1.6 Adaptation to the testing machine (drawing 1).

2. Sample preparation.

2.1. In the center of the surface of the sample, an annular groove is made with a drill to a depth equal to the thickness of the coating (Figure 1).
2.2. The resulting annular groove is filled with a release agent to prevent the glue from falling outside the calculated tear-off area.
2.3. A cylindrical test head is glued to the covered area of ​​the coating with a uniformly applied glue with a mass of 0.4 to 0.5 g, gluing is carried out at a pressure of not more than 0.2 MPa. Before gluing the test head, degrease the coating with acetone.

3. Testing

3.1. The sample with the test head is installed in the measuring machine so that the head is located symmetrically to the gripping groove and its axis coincides with the axis of the load application of the testing machine.

Drawing 1: 1 - test head, 2 - adhesive layer, 3 - sample, 4 - clip, 5 - adapter

Drawing 2: D 1 = 25 ... 30 mm, D 2 = D 1 + 4 mm

3.2. The loading is carried out until the test head is completely detached from the sample with a constant speed of movement of the movable grip of the testing machine (10 ± 1) mm / min.
3.3. Do not take into account the test results of samples in which the coating peeled off over the entire area of ​​the test head or outside the groove. In this case, the test is repeated on newly manufactured samples if the number of unaccounted samples is more than 2 pcs.

4. Processing of results

4.1. Resistivity to normal pull-off of the sample coating s ud pc (in MPa, calculated with an accuracy of 0.01 MPa according to the formula:

F- working area of ​​the test head, mm 2, determined with an accuracy of 1 mm 2.

APPENDIX 4

Mandatory

DETERMINATION OF PAPER RESIN STABILITY

COATINGS TO INCREASED AIR TEMPERATURE

1. Apparatus

1.1. An oven is used for the test, which maintains a temperature of 70 ± 2 ° C.

2.Preparation for the test

2.1 Sharp edges of the samples are cut at 45 ° to a depth of about 3 mm. The removed chamfers are treated with abrasive paper No. 8-10 so that there are no chipping of the coating.

2.2. Samples with processed bevels before testing are kept for 24 hours at a temperature of (20 ± 2) о С and a relative humidity of (65 ± 2)%.

3. Testing

3.1. Samples are placed in an oven at a temperature of (70 ± 2) ° С for 24 hours, then kept at a temperature of (20 ± 2) ° С for 24 hours.

3.2. Inspection of the samples is carried out in order to detect cracks on the surface. Inspection is carried out at an angle (20-30) about the plate face from a distance of 250 mm with the naked eye.

APPENDIX 5

List of documents,

	Number of item, sub-item, application, transfer
GOST 10632-89 GOST 13-27-82 GOST 10635-88 GOST 10636-89 GOST 9590-76 GOST 19720-74 TU Ts53.060.002 GOST 16143-81 TU 3-3.2048-88 Instruction for packaging and transportation of plates, approved by the chief engineer on 05.06.87. GOST 14192-77 GOST 7855-84 TU 2.05-862-82 TU 2-037-329-8 GOST 8284-78 GOST 27736-88 TU 3-3.2038-87 GOST 27678-88 GOST 27326-87	p.3.4. (tab. 5) p. 3.11. p.3.4. (tab. 5) p.3.4. (tab. 5) Appendix 2, clause 1.1. Appendix 2, clause 1.2. Appendix 3, clause 1.2. Appendix 3, clause 1.3. Appendix 3, clause 1.4. Appendix 3, clause 1.5.

APPENDIX 3

(excluded from TU)

DETERMINATION OF THE HARDNESS OF PROTECTIVE-DECORATIVE

PAPER RESIN COATINGS

Equipment and materials.

1. A device of the Clemen Keil type for applying scratches (Fig. 1).
2. Combined diamond needle according to TU 2-037-329-8, with a diameter of 1.5 mm and an apex angle of 50 °
3. Microscope according to GOST TU 3.3.404-83, TU3-3.154-80
4. Screw eyepiece micrometer MOV-1-15 in accordance with GOST 786-77E. It is allowed to use other devices providing an error in measuring scratches of no more than 0.015 mm.
5. Micrometer object in accordance with GOST 7513-75E (TU 3-3.2038-87) with a division price of 0.01 mm.

Selection and preparation of samples.

Determination of the scale division of an eyepiece micrometer:

1. The micrometer object is placed in the field of view of the microscope.
2. By adjusting the microscope, a sharp image of the object-micrometer scale is achieved.
3. By moving the object-micrometer or eyepiece micrometer, the strokes of the object-micrometer and one of the lines of the crosshair of the eyepiece micrometer are parallel.
4. On the scale of the object-micrometer, select a section with a length of 50 mm. The vertical thread of the eyepiece micrometer by rotating the micrometer screw is sequentially aligned with the strokes at the edges of the selected section of the object-micrometer scale and the corresponding readings are made on the microscrew drum.
5. The division value (K) of the ocular micrometer is determined as the ratio of the length of the selected section on the micrometer object to the difference in readings in the divisions of the microscrew drum of the ocular micrometer according to the formula:

Where a 1 and a 2- respectively, the first and second counts of the number of divisions on the drum of the micro-screw.

The samples are wiped with a clean, soft cloth before testing.

Testing.

1. On the movable table 1 of the device for scratching, place the sample until it stops against the side.
2. A holder 3 with a diamond needle is attached to the rocker arm 2.
3. By rotating the counterweight 4, the rocker arm 2 is balanced so that the gap between the tip of the needle and the surface of the sample is about 1 mm.
4. Holding the rocker arm with your hand, set a weight 5 weighing 0.15 kg on the holder 3.
5. The loaded rocker arm with the needle is gently released onto the sample.
6. Move the movable stage 1 smoothly at a constant speed (approximately 10 mm / s) to obtain a scratch on the sample surface with a length of at least 50 mm, after which the sample is removed from the device, the scratched surface is wiped with a soft clean cloth and placed on the microscope stage.
7. Measure the width of the scratch at three points: in the middle of the length of the scratch and at a distance of 1 cm from its ends. To measure the width of the scratch, the line of the crosshair of the eyepiece micrometer is consistently aligned with the edges of the scratch and the corresponding number of divisions of the microscrew drum is recorded.

Scratch width (v) in micrometers is determined by the formula:

where a 4 and a 3- respectively, the initial and final results of counting on the drum of the micrometer;
TO - the price of division of the eyepiece micrometer

1 - movable table, 2 - rocker arm, 3 - holder with a needle, 4 - balancing weight,
5 - a weight of 0.15 kg, 6 - a sample

1 - object-micrometer scale, 2 - eyepiece micrometer cross-hair,
3 - eyepiece micrometer scale, 4 - scratch