Pure polyethylene resin only produces carbon dioxide and H2O when it is completely burned in air, but it will not produce atmospheric pollutants. However, polyethylene plastics contain various fillers, often containing a considerable amount of substances that will produce pollutants after combustion (such as HCl, heavy metal dust, hydrocarbons and their derivatives produced during incomplete combustion, etc.). ).

Polyethylene is a thermoplastic resin prepared by ethylene polymerization. In industry, it also includes * * * polymers of ethylene and a small amount of α-olefins.

Polyethylene is odorless and non-toxic, feels like wax, and has excellent low temperature resistance (the lowest service temperature can reach-100 ~-70℃), good chemical stability and resistance to most acids and bases (not oxidative acids). Insoluble in general solvents at room temperature, low water absorption and excellent electrical insulation.

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The modified varieties of polyethylene mainly include chlorinated polyethylene, chlorosulfonated polyethylene, crosslinked polyethylene and * * * mixed modified varieties.

Chlorinated polyethylene is a random chloride obtained by partially replacing hydrogen atoms in polyethylene with chlorine. Chlorination is initiated by light or peroxide, and is mainly produced by water suspension method in industry.

Due to the differences in molecular weight and its distribution, branching degree, chlorination degree after chlorination, chlorine atom distribution and residual crystallinity of raw polyethylene, chlorinated polyethylene from rubber to hard plastic can be obtained, which is mainly used as a modifier for PVC.