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temperature, soluble in common solvents, water absorption, excellent electrical insulation properties; but poly for vinyl is sensitive to environmental stress, heat aging resistance is poor. Polyethylene nature because of different varieties, depending on the molecular structure and density. Available molded polyethylene thermoplastic processing methods in general, use is widespread, mainly used to manufacture film, containers, pipes, and other daily necessities, with the development of petrochemical industry, the

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