| http://www.w3.org/ns/prov#value | - The invention will be illustrated using polyester as the film base, specifically polyethylene terephthalate, but the invention is equally applicable to polyester film based on a crystallizable polymer resulting from the polycondensation of a glycol such as ethylene glycol or butane diol and mixtures thereof with terephthalic acid and other dicarboxylic acids such as isophthalic acid, diphenic acid
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