PE plastic is an acronym for Polyethylene - is a very popular plastic resin used in the world, has a main variable crystalline structure and is one of the safest materials. Let's learn about the concept, characteristics, classification and application of PE plastic granules with us!
1. What is PE resin?
PE plastic beads have a clear white color, but depending on the needs and applications, the plastic beads may be added in different colors. Most PE resins are used to produce plastic packaging.
PE granules
Properties of PE granules
Polyethylene is an organic compound consisting of many CH2-CH2 ethylene groups linked together by saturated hydrogen bonds.
Polyethylene is prepared by polymerization of ethylene monomers (C2H4).
Density of amorphous PP: 0.85 g/cm³
Melting Point : ~ 120 °C
Vitrification point : ~ -100 °C
Insoluble in water, fatty alcohols, acetone… at any temperature.
Only soluble at a temperature of about 70 degrees Celsius in solvents containing toluene, xylene, essential oils,....
Inactive with acidic, alkaline, bromine solutions...
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2. Characteristics of PE granules
Very good heat sealing properties.
Retains flexibility even at low temperatures, can be used at -58°C.
Non-toxic.
Extremely effective non-conductive, non-thermal, water and gas resistant.
Low cost compared to other types of plastic beads.
When in contact with detergents or essential oils, it is easy to react with swelling and damage.
Oxygen permeability is quite high.
Limited odor blocking properties.
The grease resistance is quite low.
When melted at too high a temperature causing an unpleasant odor, PE plastic is able to withstand temperatures up to 230 degrees Celsius, but its endurance period is quite short.
PE film usually has opaque color, to improve, PE must be cooled quickly after extrusion, but it is very difficult.
3. PE . resins
Based on factors such as molecular weight, density, crystallinity and degree of cross-linking, PE plastic can be divided into 8 different types:
3.1 LDPE
LDPE resin is a low density plastic. Therefore, this type of plastic is still quite safe, so it is widely used to produce different types of containers, tubes, plastic bags, ... And most commonly used as plastic bags.
LDPE granules
Density: 0.910 – 0.925 g/cm³
Vitrification temperature: Tg -110 °C
3.2 MDPE
MDPE resin is a medium density plastic. Commonly used in air ducts and fittings, sacks, packaging, transport bags, screws, etc.
Density: 0.926 – 0.940 g/cm³
3.3 UHMWPE
UHMWPE plastic, the full name is Ultra High Molecular Weight Polyethylene, is a plastic containing the highest molecular weight of all types (3.1 - 5.67 million). This type is very hard, so it is used for yarn and cartridge lining.
Density: 0.935 – 0.930 g/cm³.
Has a melting point Tm 130 °C
3.4 HDXLPE
HDXLPE resin is a resin with high density and crosslinking. is the main raw material for the production of plastic films, pipes, wires and cables.
3.5 VLDPE
VLDPE plastic is a type of plastic that won the "champion" award in terms of toughness, flexibility, very low density PE. This is a polymer with mainly a straight chain, very short branch chains. This type is made by a radical polymerization process under high pressure. VLDPE plastic is often used to produce protective gloves, shrink films, stretch films, packaging bags or is used as a component to participate in the transformation of other plastics.
Density is only 0.880 – 0.915 g/cm³
3.6 LLDPE
LLDPE resin is a straight chain low density PE plastic. There are applications to make plastic bags, plastic wrap, stretch wrap, bags, toys, lids, pipes, barrels, ...
Density: 0.915 – 0.925 g/cm³
Has a glass transition temperature Tg 110 °C
3.7 HDPE
HDPE is the abbreviation for Hight Density Poli Etilen, is a high-density PE plastic, is a material for the production of packaging, plastic bags or many other plastic utensils (plastic bottles, water pipes, etc.) )
Density: 0.941 – 0.965 g/cm³
HDPE granules
3.8 PEX or XLPE stitched
Produced by adding organic peroxides, PEX is mainly used in the making of plastic films, pipes, wires and cables.
>> See more pp belt products made from virgin pp plastic beads
4. Application of PE . resin
This type of plastic has many outstanding advantages. Therefore, PE is applied in many different fields and industries in life such as:
PE plastic is commonly used in the printing industry because of its outstanding properties (lightness, low water absorption).
Used a lot to produce bottled and packaged products because they are durable and impact resistant, so they are used to produce bottles, bottle caps, trays or films, plastic bags, some types of plastic trays. food packaging.
Used to produce other types of pipes and fittings because HDPE is a plastic with high resistance to chemical and hydrolytic effects, so it is used to produce all kinds of gas pipes, water pipes, fittings, ... And LDPE has a lower ductility, so it is often used to
make water pipes and hoses.
It has good electrical insulation and insulation, so it is used in the electrical industry to wrap wires, insulate coaxial cables and cable sheaths.
With its toughness, wear resistance, chemical resistance, it is widely used to make artificial joints for knee and hip replacement.
In addition, it is also used to produce toys and household items (ice boxes, buckets, rice containers, kitchen racks, trash cans, ...) because of its durability and lightness.
Above is the information about PE plastic beads that giaphapdonggoi.net provides to everyone. Hope this information helps you better understand what PE resins are, their characteristics and applications.
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