Polyethylene Plastic(PE)

* PE is polyethylene plastic, which can be made into plastic film, plastic bags and various parts. In order to reduce white pollution, degradation agents can be added to the plastic to achieve the purpose of rapid degradation, this type of polyethylene is called environmentally friendly plastics.It is lightweight, durable, and one of the most commonly produced plastic.

* Customized PE plastic products or parts

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What is PE Plastic?

Polyethylene referred to as PE, is a thermoplastic resin produced by the polymerization of ethylene, is the structure of the simplest polymer organic compounds, the world's most widely used PE polyethylene polymer materials, polymerization of ethylene, according to the different densities are divided into high-density polyethylene, medium-density polyethylene and low-density polyethylene.

Polyethylene is odorless, non-toxic, feels like wax, has excellent low temperature resistance (the lowest use temperature up to -100 ~ -70 ° C), good chemical stability, can withstand most acids and alkalis (not resistant to oxidizing properties of the acid). Insoluble in general solvents at room temperature, small water absorption, excellent electrical insulation.

How is PE made?

Polyethylene is made from the polymerization of ethylene (or ethene) monomer. The PE chains are produced by addition or radical polymerization. The possible synthesis methods are:

Ziegler-Natta Polymerization and

Metallocene catalysis

Are PE resins toxic?

In solid form, Polyethylene is considered as safe and non-toxic in nature. They could be toxic if inhaled and/or absorbed as a vapor or liquid (i.e., during manufacturing processes).

What are the common types of PE?

Depending on its density and branching, different PE grades can have very different performance from one another.

PE grades are therefore classified as follows.

Branched Versions

Low-density polyethylene (LDPE)

Linear low-density polyethylene (LLDPE)

Linear Versions

High-density polyethylene (HDPE)

Ultra-high-molecular-weight polyethylene (UHMWPE)

Cross-linked polyethylene (PEX or XLPE)

Additionally, other types of PE are also available such as:

Medium-density polyethylene (MDPE)

Ultra low-density polyethylene (ULDPE)

High-molecular-weight polyethylene (HMWPE)

Metallocene polyethylene (mPE)

Chlorinated polyethylene (CPE)

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PRODUCT FINDER ENGINEERING GUIDES

How to compare between the main PE types?

	LDPE	LLDPE	HDPE
Polymer Full Name	Low Density Polyethylene	Linear Low Density Polyethylene	High Density Polyethylene
Structure	High degree of short chain branching + long chain branching	High degree of short chain branching	Linear (or Low degree of short chain branching)
Catalyst and process	Using radical polymerization using tubular method or autoclave method	Using Ziegler-Natta catalyst or metallocene catalyst	Ziegler-Natta catalyst in: - Single-stage polymerization - Multi-stage polymerization or a Cr or Phillips-type catalyst
Density	0.910-0.925 g/cm3	0.91-0.94 g/cm3	0.941-0.965 g/cm3
Crystallinity	Low crystalline and high amorphous (less than 50-60% crystalline)	Semi-crytalline, level between 35 to 60%	High crystalline and low amorphous (>90% crystalline)
Recycling Code
Characteristics	Flexible and good transparency Good moisture barrier properties High impact strength at low temperature Excellent resistance to acids, bases and vegetable oils	As compared to LDPE, it has: higher tensile strength higher impact and puncture resistance	Excellent chemical resistance High tensile strength Excellent moisture barrier properties Hard to semi-flexible
General Applications	Shrink wrap, films, squeezable bottles garbage bags, extrusion moldings, and laminates	High performance bags, cushioning films, tire separator films, industrial liners, elastic films, ice bags, bags for supplemental packaging and garbage bags	Molecular weight distribution is relatively narrow, has applications in injection moldings or flat yarns, and the latter type Molecular weight distribution is wide, is used to make film products, hollow plastic products and pipes

What are the properties of HDPE?

1. Polyethylene is a typical thermoplastic, odorless, tasteless, non-toxic combustible white powder.

2. The melting point of polyethylene is 100-130C - its low temperature resistance is excellent.

3. Polyethylene has good chemical stability and is resistant to dilute nitric acid, dilute sulfuric acid, hydrochloric acid, hydrofluoric acid, phosphoric acid, formic acid, acetic acid, ammonia, amines, hydrogen peroxide, sodium hydroxide, potassium hydroxide and other solutions at room temperature.

4. Polyethylene is easy to photo-oxidation, thermal oxidation, ozone decomposition, and easily degraded under the action of ultraviolet rays.

5. Continuous temperature: -50 ° C to +60 ° C, relatively hard material with useful temperature capabilities

6. Low cost polymer with good processability

7. Very low water absorption

Which type of PE is recyclable?

Resin Identification Code for two main forms of PE are:

LDPE and HDPE are non-biodegradable in nature. They contribute significantly to the world’s plastic waste products. Both forms of PE are recyclable. They are used to produce bottles for non-food items, plastics for outdoor applications, compost bins, etc.

Services Available For PE Plastic

Finished products

Complete single product made of PE material, such as some decorative props, trash cans, etc.

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Consumer product housings and parts

Toys, Bottle Containers

Mechanical accessories, household appliances and other shell combination parts.

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