prov:value
| - Examples of suitable film substrates include polyesters, especially polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polysulfones, polystyrenes, polycarbonates, polyimides, polyamides, cellulose esters such as cellulose acetate and cellulose butyrate, polyvinyl chlorides and derivatives thereof, and copolymers comprising one or more of the above materials.
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