| http://www.w3.org/ns/prov#value | - Exemplary thermoplastic materials include cellulose, e.g., cellulose acetate, cellulose propionate, cellulose butyrate; mixed esters of cellulose; cellulose ethers, e.g., ethyl cellulose; nylon or polymeric materials, e.g. polyvinyl alcohol acetals, polyvinyl chloride, polyvinyl chloride acetate, polystyrene, methyl methacrylate, polyethylene, polypropylene, and other polyolefins which may be form
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