By parameters, photo, cost.

One of the main properties of polyethylene is its density. In strong polyethylene, it is approximately 940-960 g / m3. This high is achieved by polymerization with a catalyst system. This material is called polyethylene. high pressure... It is a tough thermoplastic material that is used in injection and blow molding applications.

The main properties of this class of polyethylene include good chemical resistance, minimal water absorption, good extensibility, elasticity and resistance to temperature changes in the range from -70 to +100 degrees. The material is easy to process and weldable very well.

High density polyethylene film is used to make bags for non food products, pipes for agricultural works, packing material. In particular, packaging bags, bags with a die cut handle, garbage bags, and air bubble wrap are made from such a film.

In everyday life, the product is used in the construction of greenhouses, summer cafes and a shower (for such objects, a colored opaque film is used). It is characteristic that when exposed to a film of high pressure, elevated temperature, it is easily applied to various surfaces - cardboard, paper, foil, etc. The surfaces on which the LDPE is applied are moisture-resistant and waterproof, strong enough.

HDPE polyethylene films have good electrical insulating qualities (in some types of films, the electrical density reaches 150 kV / mm). With an increase in the density of the film, such quality parameters as strength, stiffness, and chemical resistance increase. Thus, we can conclude that high polyethylene film density provides a number useful qualities... If you need such a film, please contact LENTAPAK.

Low density polyethylene film

Today one of the most popular materials among buyers is low density polyethylene. As you know, low is determined by the number of branches per 100 carbon atoms. The crystallinity of the molecules is 50-70%.

The softening point of a low density film is significantly lower than the temperature of boiling water. Therefore, this type of film cannot be used in conjunction with hot water or ferry. Low density polyethylene is characterized by plasticity, mattness. Its density ranges from 0.915 to 0.936 g / cm3. Films of this type are easy to heat-seal and form strong seams. You can glue the film with scotch tape and polyisobutylene adhesives. On material after preliminary preparation it is possible to print.

Low pressure film coatings withstand shocks well enough, are resistant to tensile and tensile loads. They are also resistant to temperature extremes (from -50 to +10 degrees). Films are waterproof, but have poor oxidation resistance, therefore, they are not suitable for packaging some types of products. Good chemical resistance with low oil and fat resistance somewhat limits the contact of this type of film with certain liquids.

Low density polyethylene is often used in the manufacture of bags, wrapping, sacks. In the manufacture of shopping bags, mainly films from 20 to 60 microns are used. Low density does not mean that the film is fragile. The use of additives can significantly increase the strength of products. For small-capacity bags, a film with a thickness of up to 10 microns is used. Thus, we see that density of polyethylene in the form of a film is one of the main parameters.

High density polyethylene film kg m3 (LDPE production)

The high demand for high pressure film requires modern ways its production. Polyethylene film is made in extruders. Needed density of polyethylene film (kg / m3) is achieved by adding granular and in the form of a powder of high pressure polyethylene. Further, the viscous mass is blown out of the extruder onto a special receiver. The film has a round and flat cross section.

Production highlights

Polyethylene granules fall into the receiving hopper. To improve the properties of the material, special additives are used. Then the polymer falls on the surface of the screw. As the screw rotates, the material begins to heat up and melt. Once the alloy is homogeneous, it is extruded. After passing through the head, the product is obtained in the desired shape.

To obtain a sleeve, the workpiece must pass through a special slot and swell up to required sizes... The diameter and thickness of the sleeve can be adjusted by setting the amount of air supplied. The fabric is obtained from a sleeve - by cutting it directly from two sides, a half-sleeve - from one. The resulting sleeve must cool and then pass through the receiving device, after which the film is wound into rolls.

All stages are closely monitored. In particular, you need to monitor the temperature and pressure, as well as the color (if a colored film is being made). A high-quality film provides for a uniform thickness over the entire area of \u200b\u200bthe web, a "correct" color, no folds and creases, an even and dense winding. Checked density of polyethylene film (kg / m3) density meter on different sites... If you need polyethylene film, contact the LENTAPAK company.

The formally abolished metric unit is equal to 10 -6 (one millionth) meter. Notation µ. The name and designation were adopted in 1879 by the International Committee for Weights and Measures (CIPM) and re-approved by Resolution 7 at the 9th General Conference on Weights and Measures (CGPM) in 1948. In 1967, the 13th CGPM conference abolished the unit "micron" (Resolution 7) and recommended the use of the term "micrometer" instead. For this unit of length in the SI system, the term "micrometer" is adopted (designation µm, µm). However, the term “micron” continues to be widely used in several fields, including semiconductor manufacturing. This term is often used to describe the particle size trapped in air and water filters, the wavelength ranges that optical instrumentsas well as in mechanical processing. One of the uses where the use of this unit is currently legalized state standards, this is a description of the quality of wool and other textile goods (see www.ymccoll.com/micron_reports.html).

Micron is often found in the word millimicron \u003d 10 -9 meters or 1/1000 of a micron. The notation is mµ. Like the micron, the millimicron is an obsolete unit. Modern unit SI system, having the same magnitude, is a nanometer (notation nm, nm).

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1 meter [m] \u003d 1,000,000 micrometer [μm]

Initial value

Converted value

meter exameter petameter terameter gigameter megameter kilometer hectometer decameter decimeter centimeter millimeter micrometer micron nanometer picometer femtometer attometer megaparsec kiloparsec parsec light-year astronomical unit league nautical league (MU) nautical league (international) mile (m.) nautical league (international) mile. (international) mile (statutory) mile (US geodetic) mile (roman) 1000 yards furlong furlong (US geodesic) chain chain (US geodesic) rope genus genus (US geodesic) pepper pol pole) fathom, fathom veil (US geodesic) elbow yard foot foot (US geodetic) link link (US geodesic) elbow (UK) hand span finger nail inch (US geodesic) barley grain (eng. barleycorn) thousandth microinch angstrom atomic length unit x-unit fermi arpan soldering typographic point twip elbow (swedish) fathom (swedish) caliber centiinch ken arshin actus (dr. Rome) vara de tarea vara conu quera vara castellana elbow (Greek) long reed reed long elbow palm "finger" Planck length classical electron radius Bohr radius equatorial radius of the Earth polar radius of the Earth distance from Earth to the Sun radius of the Sun light nanosecond light microsecond light millisecond light second light hour light day light week Billion light years Distance from Earth to Moon cable (international) cable (UK) cable (USA) nautical mile (USA) light minute rack unit horizontal step cicero pixel line inch (Russian) inch span foot fathom oblique fathom verst boundary verst

Feet and inches to meters and back converter

foot inch

m

Power in diopters and lens magnification

More about length and distance

General information

Length is largest dimension body. IN three-dimensional space the length is usually measured horizontally.

Distance is a value that determines how far two bodies are from each other.

Distance and length measurement

Distance and length units

In SI, length is measured in meters. Derived quantities such as kilometer (1000 meters) and centimeter (1/100 meter) are also commonly used in the metric system. In countries that do not use the metric system, such as the United States and Great Britain, units such as inches, feet and miles are used.

Distance in physics and biology

In biology and physics, lengths are often measured much less than one millimeter. For this, a special value is adopted, a micrometer. One micrometer is equal to 1 × 10⁻⁶ meters. In biology, micrometers measure the size of microorganisms and cells, and in physics, the length of infrared electromagnetic radiation. The micrometer is also called the micron and sometimes, especially in the English-language literature, denote greek letter µ. Other derivatives of the meter are also widely used: nanometers (1 × 10⁻⁹ meters), picometers (1 × 10⁻¹² meters), femtometers (1 × 10⁻¹⁵ meters and attometers (1 × 10⁻¹⁸ meters).

Navigation distance

In shipping, nautical miles are used. One nautical mile is equal to 1852 meters. It was originally measured as an arc of one minute along the meridian, that is, 1 / (60 × 180) meridian. This made it easier to calculate latitude, since 60 nautical miles equals one degree of latitude. When distance is measured in nautical miles, speed is often measured in nautical knots. One knot equal to the speed of movement of one nautical mile per hour.

Distance in astronomy

In astronomy, long distances are measured, so special quantities are adopted to facilitate calculations.

Astronomical unit (a. e., au) is equal to 149 597 870 700 meters. The magnitude of one astronomical unit is a constant, that is, a constant value. It is generally accepted that the Earth is at a distance of one astronomical unit from the Sun.

Light year is equal to 10,000,000,000,000 or 10¹³ kilometers. This is the distance that light travels in a vacuum in one Julian year. This value is used in popular science literature more often than in physics and astronomy.

Parsec is approximately equal to 30,856,775,814,671,900 meters or approximately 3.09 × 10¹³ kilometers. One parsec is the distance from the Sun to another astronomical object, such as a planet, star, moon, or asteroid, at an angle of one arc second. One arc second is 1/3600 of a degree, or approximately 4.8481368 mrad in radians. Parsec can be calculated using parallax - the effect of a visible change in body position, depending on the point of view. During measurements, a segment E1A2 (in the illustration) is laid from the Earth (point E1) to a star or other astronomical object (point A2). Six months later, when the Sun is on the other side of the Earth, a new segment E2A1 is laid from the new position of the Earth (point E2) to a new position in space of the same astronomical object (point A1). In this case, the Sun will be at the intersection of these two segments, at point S. The length of each of the segments E1S and E2S is equal to one astronomical unit. If we postpone a segment through point S, perpendicular to E1E2, it will pass through the point of intersection of segments E1A2 and E2A1, I. The distance from the Sun to point I is segment SI, it is equal to one parsec when the angle between segments A1I and A2I is two arc seconds.

On the picture:

• A1, A2: apparent position of the star
• E1, E2: Earth position
• S: position of the sun
• I: intersection point
• IS \u003d 1 parsec
• ∠P or ∠XIA2: parallax angle
• ∠P \u003d 1 arc second

Other units

League is an obsolete unit of length previously used in many countries. It is still used in some places, such as in the Yucatan Peninsula and in rural Mexico. This is the distance that a person travels in an hour. Nautical League - three nautical miles, approximately 5.6 kilometers. Lie is a unit roughly equal to a league. IN english language both leagues and leagues are called the same, league. In literature, le is sometimes found in the titles of books, such as "20,000 Leagues Under the Sea" - the famous novel by Jules Verne.

Elbow - old value, equal to distance from the tip of the middle finger to the elbow. This value was widespread in the ancient world, in the Middle Ages, and until modern times.

Yard used in British imperial units and equal to three feet or 0.9144 meters. In some countries, such as Canada, where metric system, yards are used to measure the fabric and length of swimming pools and sports fields and fields such as golf and soccer fields.

Definition of meter

The definition of the meter has changed several times. The meter was originally defined as 1 / 10,000,000 of the distance from the North Pole to the equator. Later, the meter was equal to the length of the platinum-iridium standard. Later, the meter was equated to the wavelength of the orange line of the electromagnetic spectrum of the krypton atom ⁸⁶Kr in vacuum, multiplied by 1,650,763.73. Today, the meter is defined as the distance traveled by light in a vacuum in 1/299 792 458 seconds.

Calculations

In geometry, the distance between two points, A and B, with coordinates A (x₁, y₁) and B (x₂, y₂) is calculated by the formula:

and you will receive an answer within a few minutes.

Calculations for converting units in the converter " Length and Distance Converter»Are performed using the unitconversion.org functions.

Length and Distance Converter Mass Converter Bulk and Food Volume Converter Area Converter Culinary Recipe Volume and Units Converter Temperature Converter Pressure, Stress, Young's Modulus Converter Energy and Work Converter Power Converter Force Converter Time Converter Linear Velocity Converter Flat Angle Converter Thermal Efficiency and Fuel Efficiency Numeric Conversion Systems Converter of Information Measurement Systems Currency Rates Women's Clothing and Shoes Sizes Men's Clothing and Shoes Sizes Angular Velocity and Rotation Rate Converter Acceleration Converter Angular Acceleration Converter Density Converter Specific Volume Converter Moment of Inertia Converter Moment of Force Converter Torque converter Specific calorific value (mass) converter Energy density and specific calorific value (volume) converter Temperature difference converter Coefficient converter Thermal Expansion Curve Thermal Resistance Converter Thermal Conductivity Converter Specific Heat Capacity Converter Thermal Exposure and Radiation Power Converter Heat Flux Density Converter Heat Transfer Coefficient Converter Volumetric Flow Rate Converter Mass Flow Rate Converter Molar Flow Rate Converter Mass Flux Density Converter Molar Concentration Converter Mass Concentration in Solution Converter absolute) viscosity Kinematic viscosity converter Surface tension converter Vapor permeability converter Vapor permeability and vapor transfer rate converter Sound level converter Microphone sensitivity converter Sound pressure level (SPL) converter Sound pressure level converter with selectable reference pressure Luminance converter Luminous intensity converter Light intensity converter Resolution to computer converter chart Frequency and wavelength converter Optical power to diopter x and focal length Optical power in diopters and lens magnification (×) Electric charge converter Linear charge density converter Surface charge density converter Volume charge density converter Electric current linear current density converter Surface current density converter Electric field strength converter Electrostatic potential and voltage converter Converter Electrical Resistivity Electrical Resistivity Converter Electrical Conductivity Converter Electrical Conductivity Converter Electrical Capacitance Inductance Converter American Wire Gauge Converter Levels in dBm (dBm or dBmW), dBV (dBV), watts, etc. units Magnetomotive force converter Magnetic field strength converter Magnetic flux converter Magnetic induction converter Radiation. Ionizing Radiation Absorbed Dose Rate Converter Radioactivity. Radioactive Decay Radiation Converter. Exposure Dose Converter Radiation. Absorbed Dose Converter Decimal Prefix Converter Data Transfer Typography and Image Processing Unit Converter Timber Volume Unit Converter Calculating Molar Mass Periodic Table of Chemical Elements D. I. Mendeleev

1 meter [m] \u003d 1,000,000 micrometer [μm]

Initial value

Converted value

meter exameter petameter terameter gigameter megameter kilometer hectometer decameter decimeter centimeter millimeter micrometer micron nanometer picometer femtometer attometer megaparsec kiloparsec parsec light-year astronomical unit league nautical league (MU) nautical league (international) mile (m.) nautical league (international) mile. (international) mile (statutory) mile (US geodetic) mile (roman) 1000 yards furlong furlong (US geodesic) chain chain (US geodesic) rope genus genus (US geodesic) pepper pol pole) fathom, fathom veil (US geodesic) elbow yard foot foot (US geodetic) link link (US geodesic) elbow (UK) hand span finger nail inch (US geodesic) barley grain (eng. barleycorn) thousandth microinch angstrom atomic length unit x-unit fermi arpan soldering typographic point twip elbow (swedish) fathom (swedish) caliber centiinch ken arshin actus (dr. Rome) vara de tarea vara conu quera vara castellana elbow (Greek) long reed reed long elbow palm "finger" Planck length classical electron radius Bohr radius equatorial radius of the Earth polar radius of the Earth distance from Earth to the Sun radius of the Sun light nanosecond light microsecond light millisecond light second light hour light day light week Billion light years Distance from Earth to Moon cable (international) cable (UK) cable (USA) nautical mile (USA) light minute rack unit horizontal step cicero pixel line inch (Russian) inch span foot fathom oblique fathom verst boundary verst

Feet and inches to meters and back converter

foot inch

m

Thermal resistance

More about length and distance

General information

Length is the longest measurement of the body. In 3D space, length is usually measured horizontally.

Distance is a value that determines how far two bodies are from each other.

Distance and length measurement

Distance and length units

In SI, length is measured in meters. Derived quantities such as kilometer (1000 meters) and centimeter (1/100 meter) are also commonly used in the metric system. In countries that do not use the metric system, such as the United States and Great Britain, units such as inches, feet and miles are used.

Distance in physics and biology

In biology and physics, lengths are often measured much less than one millimeter. For this, a special value is adopted, a micrometer. One micrometer is equal to 1 × 10⁻⁶ meters. In biology, micrometers measure the size of microorganisms and cells, and in physics, the length of infrared electromagnetic radiation. The micrometer is also called the micron and is sometimes, especially in the English-language literature, denoted by the Greek letter µ. Other derivatives of the meter are also widely used: nanometers (1 × 10⁻⁹ meters), picometers (1 × 10⁻¹² meters), femtometers (1 × 10⁻¹⁵ meters and attometers (1 × 10⁻¹⁸ meters).

Navigation distance

In shipping, nautical miles are used. One nautical mile is equal to 1852 meters. It was originally measured as an arc of one minute along the meridian, that is, 1 / (60 × 180) meridian. This made it easier to calculate latitude, since 60 nautical miles equals one degree of latitude. When distance is measured in nautical miles, speed is often measured in nautical knots. One nautical knot is equal to the speed of one nautical mile per hour.

Distance in astronomy

In astronomy, long distances are measured, so special quantities are adopted to facilitate calculations.

Astronomical unit (a. e., au) is equal to 149 597 870 700 meters. The magnitude of one astronomical unit is a constant, that is, a constant value. It is generally accepted that the Earth is at a distance of one astronomical unit from the Sun.

Light year is equal to 10,000,000,000,000 or 10¹³ kilometers. This is the distance that light travels in a vacuum in one Julian year. This value is used in popular science literature more often than in physics and astronomy.

Parsec is approximately equal to 30,856,775,814,671,900 meters or approximately 3.09 × 10¹³ kilometers. One parsec is the distance from the Sun to another astronomical object, such as a planet, star, moon, or asteroid, at an angle of one arc second. One arc second is 1/3600 of a degree, or approximately 4.8481368 mrad in radians. Parsec can be calculated using parallax - the effect of a visible change in body position, depending on the point of view. During measurements, a segment E1A2 (in the illustration) is laid from the Earth (point E1) to a star or other astronomical object (point A2). Six months later, when the Sun is on the other side of the Earth, a new segment E2A1 is laid from the new position of the Earth (point E2) to a new position in space of the same astronomical object (point A1). In this case, the Sun will be at the intersection of these two segments, at point S. The length of each of the segments E1S and E2S is equal to one astronomical unit. If we postpone a segment through point S, perpendicular to E1E2, it will pass through the point of intersection of segments E1A2 and E2A1, I. The distance from the Sun to point I is segment SI, it is equal to one parsec when the angle between segments A1I and A2I is two arc seconds.

On the picture:

• A1, A2: apparent position of the star
• E1, E2: Earth position
• S: position of the sun
• I: intersection point
• IS \u003d 1 parsec
• ∠P or ∠XIA2: parallax angle
• ∠P \u003d 1 arc second

Other units

League is an obsolete unit of length previously used in many countries. It is still used in some places, such as in the Yucatan Peninsula and in rural Mexico. This is the distance that a person travels in an hour. Nautical League - three nautical miles, approximately 5.6 kilometers. Lie is a unit roughly equal to a league. In English, both leagues and leagues are called the same, league. In literature, le is sometimes found in the titles of books, such as "20,000 Leagues Under the Sea" - the famous novel by Jules Verne.

Elbow - the old value, equal to the distance from the tip of the middle finger to the elbow. This value was widespread in the ancient world, in the Middle Ages, and until modern times.

Yard used in British imperial units and equal to three feet or 0.9144 meters. In some countries, such as Canada, where the metric system is adopted, yards are used to measure the fabric and length of swimming pools and sports fields and fields such as golf and soccer.

Definition of meter

The definition of the meter has changed several times. The meter was originally defined as 1 / 10,000,000 of the distance from the North Pole to the equator. Later, the meter was equal to the length of the platinum-iridium standard. Later, the meter was equated to the wavelength of the orange line of the electromagnetic spectrum of the krypton atom ⁸⁶Kr in vacuum, multiplied by 1,650,763.73. Today, the meter is defined as the distance traveled by light in a vacuum in 1/299 792 458 seconds.

Calculations

In geometry, the distance between two points, A and B, with coordinates A (x₁, y₁) and B (x₂, y₂) is calculated by the formula:

and you will receive an answer within a few minutes.

Calculations for converting units in the converter " Length and Distance Converter»Are performed using the unitconversion.org functions.

Filter

Nowadays, unscrupulous manufacturers can artificially increase the density of garbage bags, but they are quite easy to bring to clean water... This will require simple tools and our table for calculating the correct weight of the bag at its stated density by the seller.

Let's see what micronity is and why it is so important.

What is micronity for packages

Have you ever wondered why garbage bags from one manufacturer leak and break, while another can withstand heavy loads and tension, but remain as strong and intact? All this is due to the different density of the bag: how much the manufacturer will spend the material, how much the polyethylene will stretch - this is the strength of the bag. But how is this density measured? In millimeters? In grams per millimeter? In what degree?

So, to determine the thickness there is a parameter - micron (microns).

What is a micron?

Micron (µ, µ, µm, µm) is a unit of measurement taken as 10 −6 meters (1 µm \u003d 0.001 mm \u003d 0.0001 cm \u003d 0.000001 m).

Why do you need to know the microness of the package?

The microness (thickness) index of HDPE and LDPE packages will allow you to accurately determine what kind of load the package can withstand, its carrying capacity.

What's wrong with the garbage bags

Today, garbage bags are produced with microns from 4 microns and above. Some manufacturers indicate the density index on their product labels, but it rarely reflects the actual thickness of the bag. In order to accurately determine the thickness of the product, on our website we offer an exact standard definition of the microness of HDPE and LDPE garbage bags, which is calculated based on four parameters:

• Weights.
• Density.
• Squares (length, width).
• The quality for the type of raw material.

The micron value is important when we want to know exactly what load the packages are designed for. The lower the indicator, the less load the package can endure, and, conversely, the higher the micron, the higher its carrying capacity.

How to independently determine the density of the bag

You will need the following things:

• Rubbish bag.
• Kitchen scales.
• Ruler.

Measure the width and height of the bag, write it down in our formula. Check the density of the bag with the seller - the density is measured in micrometers (μm). Substitute the resulting values \u200b\u200binto our calculation table and check the resulting weight.

Now fold the bag compactly and weigh it on a household scale. If the seller is respectable, then the resulting value in the formula will not differ from the value on the scales.

You can use our weight formula:

HDPE bag density calculator	LDPE bag density calculator