prov:value
| - In the case where the processability, moldability and flexibility are important, there are preferably used organic polymeric materials, for example, polyesters such as polyethylene terephthalate, polyethylene naphthalate, polyethylene dicarboxylate and polyethylene-??,??-bis(2-chlorophenoxy)ethane-4,4'-dicarboxylate, polyolefins such as polyethylene, polypropylene and polybutene, polymethyl methac
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