prov:value
| - Preferred molding materials include thermoplastic resin, thermoplastic elastomer, thermosetting resin, and vulcanized rubber. [0040] The thermoplastic resin includes polyethylene, polypropylene, ethylene-a-olefin copolymer such as ethylene-propylene copolymer, polymethylpentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, ethylene vinyl acetate copolymer, polyvinyl alcohol, pol
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