1. Introduction to PE material
Polyethylene (PE) is a thermoplastic made by polymerizing ethylene monomers, and is currently one of the largest and most widely used plastics in the world. According to the different densities and molecular chain structures, PE is mainly divided into:
LDPE (Low Density Polyethylene)
HDPE (High Density Polyethylene)
LLDPE (Linear Low Density Polyethylene)
UHMWPE (Ultra High Molecular Weight Polyethylene)
2. Main properties of PE material
Good mechanical toughness and strong impact resistance (especially HDPE and UHMWPE), but low rigidity.
Chemical resistance to acid, alkali, salt, and most organic solvents, but not to strong oxidants such as concentrated nitric acid and concentrated sulfuric acid.
Excellent electrical insulation performance, commonly used in wire and cable sheaths.
Low temperature resistance maintains flexibility below -60 ºC, suitable for freezing environments.
The processing performance is easy to process (injection molding, blow molding, extrusion, etc.), and the melting point is relatively low (LDPE is about 105 ºC, HDPE at approximately 130 ºC.
Moisture permeability/low permeability, but poor breathability, not suitable for packaging that requires high breathability.
Environmentally friendly and recyclable, but difficult to degrade naturally, attention should be paid to the issue of white pollution.
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