Polymeric film
AssigneeDupont Teijin Films US Limited Partner
InventorsPhilip Mark Rutter, Allan Lovatt
Life of this patent
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Abstract
A polymeric film comprising a polyester film substrate comprising 0.1% to 10% by weight, relative to the weight of the polyester, of at least one UV absorber, and a heat sealable layer, wherein the substrate is a multilayer film having an outer substrate layer and an inner substrate layer, the inner substrate layer comprising 1% to 40% by weight of UV absorber, relative to the amount of UV absorber present in the outer substrate layer. The film is particularly suitable for use as a protective layer on a metal sheet.
Claims1
A polymeric film comprising a polyester film substrate comprising in the range from 0.1 to 10% by weight, relative to the weight of the polyester, of at least one UV absorber, and a heat-sealable layer on a surface of the substrate wherein the substrate is a multilayer film having an outer substrate layer and an inner substrate layer, the inner substrate layer comprising in the range from 1% to 40% by weight of UV absorber, relative to the amount of UV absorber present in the outer substrate layer.
Dependencies are inferred from the claim text.