| http://www.w3.org/ns/prov#value | - The outer layer may contain thermoplastic resin other than the polyester-based resin in an amount up to 20 wt %, such as a thermoplastic elastomer as typified by thermoplastic polyurethane, or polyolefin-based resin which is modified with an acid such as maleic acid or an anhydride thereof.
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