What are the properties of PE strip plastic profiles?
PE is the highest-yielding variety in the plastics industry. Polyethylene is a thermoplastic resin prepared by ethylene polymerization. The industry also includes copolymers of ethylene and a small amount of α-olefins. Polyethylene is odorless and non-toxic, feels like wax, has excellent low-temperature resistance (the lowest operating temperature can reach -100 ~-70℃), good chemical stability, and can resist the corrosion of most acids and alkalis (not resistant to oxidizing acids). It is insoluble in general solvents at room temperature, has low water absorption, and excellent electrical insulation. PE strip plastic profiles are generally used for cling film, vest-type plastic bags, plastic food bags, milk bottles, buckets, kettles, etc.
1. Material properties of PE strip plastic profiles:
It is a crystalline thermoplastic resin of polyethylene. Their chemical structure, molecular weight, degree of polymerization and other properties depend largely on the polymerization method used. The polymerization method determines the type and degree of branching. The degree of crystallinity depends on the regularity of the molecular chain and its thermal history.
Polyethylene is very sensitive to environmental stress (chemical and mechanical action), and its heat aging resistance is worse than the chemical structure and processing band of the polymer. Polyethylene can be processed by the molding method of general thermoplastics (see plastic processing). PE strip plastic profiles are widely used, mainly used to make films, packaging materials, containers, pipes, monofilaments, wires and cables, daily necessities, etc. , can be used as high-frequency insulation materials for televisions, radars, etc. With the development of the petrochemical industry, polyethylene production has developed rapidly, and its output accounts for about 1/4 of the total plastic output.
Polyethylene (PE) is a kind of plastic, and the convenient bag we often say is polyethylene (PE). Polyethylene is the simplest polymer and the most widely used polymer material. It is connected by repeated –CH2– units. Polyethylene is produced by addition polymerization of ethylene (CH2=CH2).
The properties of polyethylene depend on its polymerization method. High-density polyethylene is prepared by Ziegler-NATTA polymerization under medium pressure (15-30 atmospheres) under the catalysis of organic compounds. Under these conditions, the polymerized polyethylene molecules are linear, the molecular chains are very long, and the molecular weight is hundreds of thousands. If free radical polymerization is carried out under high pressure (100-300MPA), high temperature (190-210°C) and peroxide catalysis, low-density polyethylene (LDPE) will be produced, which has a branched composite structure.