Patent ID: 8334020
Filing Date: 2012-12-18
Classification: B29C,C08L,Y10T

Abstract:
1. A process to make a two-phase polymer layer having a thickness of from 0.5 to 20 mils, said layer comprising: I) from 60 to 90 weight % of a polymer composition A having a peak melting point of greater than 85° C., wherein said polymer composition A is provided as particles having an average particle size of from 1 to 400 microns and wherein said polymer composition A consists of: II) from 40 to 10 weight % of a polyolefin B having a peak melting point of less than 70° C., wherein said two-phase layer is characterized by having a morphology wherein said polymer composition A forms a discontinuous phase of discrete particles in a continuous phase of said polyolefin B; said process comprising: I) forming a two-phase solvent-slurry by mixing said polymer composition A and said polyolefin B in a liquid which is a solvent for said polyolefin B and which is a non-solvent for said polymer composition A; II) depositing said solvent-slurry as thin coating on a non-stick surface; and III) removing said liquid so as to form a two-phase polymer layer having a thickness of from 0.5 to 20 mils, and wherein said polyolefin B is further characterized by having a density of less than 0.885 grams per cubic centimeter.