| http://www.w3.org/ns/prov#value | - Preferred plastic materials include poly(ether ether ketones), polyimides, polyamides, polyolefins such as polypropylenes and high molecular weight polyethylenes, polyetherimides, polybutylene terephthalates, nylons, fluoropolymers such as polytetrafluoroethylenes, polysulfones, polyesters, polyethylene terephthalates, acetal homo and copolymers, and polyvinyl chlorides.
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