Back to results
US 8,075,986 B2Granted
Opaque films for use in packaging
AssigneeFina Technology, Inc.
InventorsJuan Aguirre, Mark Miller
Life of this patent
Estimating the term…
Abstract
An opaque polymer film is prepared by admixing high crystalline polypropylene with a microvoid causing filler and extruding to form a sheet that is then biaxially stretched to form an opaque film. End uses for these films include soda bottles, candy wrappers and synthetic paper.
Claims7
An opaque biaxially oriented polymer film comprising a high crystalline polypropylene having a heat of fusion of at least 70 joules/g and prepared using a metallocene catalyst, wherein the film has a thickness of less than 1.25 mil and wherein the film has a density of from about 0.44 to about 0.55 g/cm3.
Dependencies are inferred from the claim text.