| http://www.w3.org/ns/prov#value | - Films made of a polyester polymer, i.e. polymers having a --CORCO-- group in the polymer chain (in which R is any divalent hydrocarbyl or substituted hydrocarbyl radical), are preferred in applications in which the label is expected to experience temperatures less than about 150 C. Representative films made of a polyester polymer include those sold under the Mylar brand by E. I. Du Pont de Nemours
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