What is the difference between pp and pe?

1. Different compositions 1. PE: It is a thermoplastic resin made by polymerizing ethylene.

2. PP: It is a polymer formed by the addition polymerization reaction of propylene.

2. Different characteristics 1. PE: odorless, non-toxic, feels like wax, has excellent low temperature resistance (the lowest operating temperature can reach -100~-70°C), has good chemical stability, and can withstand most acids and alkalis.

erosion.

2. PP: Density is 0.89~0.91g/cm3, flammable, melting point is 165°C, softens at around 155°C, use temperature range is -30~140°C.

It can withstand the corrosion of acid, alkali, salt solution and various organic solvents below 80℃, and can decompose under high temperature and oxidation.

3. The application of different polypropylene has good mechanical properties and can be directly manufactured or modified to manufacture parts of various mechanical equipment, such as manufacturing industrial pipes, agricultural water pipes, motor fans, basic templates, etc.

Modified polypropylene can be molded into bumpers, anti-scuff strips, car steering wheels, dashboards and interior decoration parts, etc., which can greatly reduce the weight of the car body and save energy.

Polyethylene can be processed using general thermoplastic molding methods.

It has a wide range of uses, mainly used to make films, packaging materials, containers, pipes, monofilaments, wires and cables, daily necessities, etc., and can be used as high-frequency insulation materials for televisions, radars, etc.

With the development of petrochemical industry, polyethylene production has developed rapidly, and its output accounts for about 1/4 of the total plastic output.