Biaxially oriented film with voided baselayer
AssigneeCourtaulds Films (Holdings) Limited
InventorsEdward D. Surman, David Williamson
Life of this patent
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Abstract
Biaxially oriented film including a voided base layer consisting of a propylene homopolymer and a particulate voiding agent, and a non-voided outer layer of propylene homopolymer coextensive with the voided base layer, the particular voiding agent having a mean particle size of not more than 2 .mu.m. Such films have good opacity combined with good gloss for the surface of the non-voided outer layer of propylene homopolymer on the base layer.
Claims5
A biaxially oriented film consisting essentially of a voided base layer consisting essentially of a polypropylene homopolymer and a particulate voiding agent, and a non-voided outer layer consisting essentially of propylene homopolymer directly adhered to the voided base layer, the particulate voiding agent having a mean particle size of not more than 2 .mu.m.
Dependencies are inferred from the claim text.