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The difference between high and low pressure PE pipe


Release time:

Aug 18,2019

High pressure is obtained by reaction under high pressure, and the corresponding low density PE, that is, LDPE low pressure is polymerized under lower pressure, and the corresponding high density PE, that is, HDPE, is obtained. Generally its density is 0.92~0.97. The high density seems to be in the range of 0.95~0.97. Garbage bags, plastic film, shed film, cling film are LDPE, all kinds of bottles. Can. A basin. Containers such as barrels, fishing nets and strapping belts are all HDPE. I have the following processing characteristics of LDPE and HDPE. Comparative LDPEHDP on Processing Characteristics of PE Pipe LDPE and HDPE

High pressure is obtained by reaction under high pressure, and the corresponding low density PE, that is, LDPE low pressure is polymerized under lower pressure, and the corresponding high density PE, that is, HDPE, is obtained. Generally its density is 0.92~0.97. The high density seems to be in the range of 0.95~0.97. Garbage bags, plastic film, shed film, cling film are LDPE, all kinds of bottles. Can. A basin. Containers such as barrels, fishing nets and strapping belts are all HDPE. I have the following processing characteristics of LDPE and HDPE.
PE pipe

Comparison of Processing Characteristics of LDPE and HDPE

LDPE HDPE film blowing is the easiest and most difficult

Injection molding soft and rigid

Pipe extrusion soft good rigidity

Cable extrusion, fast extrusion speed, good heat resistance, crosslinkable

Hollow molding parison has good strength and good rigidity

Rotational molding has good fluidity and is difficult to flow.

Powder coating low temperature softening suitable conditions narrow

Extrusion coating necking phenomenon small suitable conditions narrow

Crosslinking Foaming Performance Easy to Control Performance Easy to Control

Sensory identification: LDPE is white waxy, transparent. HDPE is white translucent.

Combustion identification: the burning flame is yellow and blue; when burning, there is no smoke, the smell of paraffin wax, melting and dripping.

Density identification: alcohol solution (45.2,) solution density 0.925:LDPE is heavier and HDPE is lighter

Specific physical also has a variety of materials. For example, the film has high pressure, low pressure PE, PET and PVC. Woven bags are mostly PP. LDPE in sunrise is mostly container utensils: shampoo bottles, HDPE: soy sauce bottles, etc.

The main use of PE is film products. LDPE resin can account for more than 50% of film products. It can be used for light packaging films such as food, daily use, vegetables, shrinkage, self-adhesive, garbage bags, and agricultural plastic films, greenhouse films, fresh-keeping films, etc. HDPE resin for film products can account for more than 10%, because of its high film strength, mainly used for heavy packaging film, tear film and vest bags.
 

In silk products, round wire is made of HDPE, which is mainly used for weaving fishing nets, cables, industrial filters and civil screens. Flat wire with HDPE and LLDPE as raw materials, mainly used for woven bags, woven cloth and tear film.

The main difference between high-pressure PE material and low-pressure PE material is that the hardness is different, which can be matched with each other to make various plastic films. The woven bag is mainly PP material

The simplest way to distinguish between high and low pressure is to tear it by hand and produce white marks to prove that it is low pressure. Because low pressure is high density, white marks will be produced. Generally, high-pressure fishing nets are made of pp material. Wahaha bottles and shampoo bottles are usually made of low-pressure hollow materials. It is impossible to use high-pressure materials. Bottles made of high-pressure materials are soft packages, such as orange water popsicles, of course, some high-pressure materials are also used to make bottles to soften the bottles.





































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