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| - While plastic materials such as high density polyethylene has been used effectively, other thermoplastic materials can be used such as cellulose acetate, cellulose acetate butyrate, polyvinyl, polypropylene, polybutylene, styrene, acrylic, ABS polymers, ethyl cellulose propionate, chlorinated polyether, polyvinyl chloride, polyvinylidene chloride, copolymers of methyl methacrylate and styrene, cop
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