Patent ID: 7329453
Filing Date: 2008-02-12
Classification: B32B,Y10S,Y10T

Abstract:
1. A coextruded, biaxially oriented polyester film which has a white base layer (B) and has a heatsealable outer layer (A) that can be peeled from APET/CPET and from CPET, where the outer layer (A) comprises a) from 80 to 99% by weight of polyester and b) from 1 to 10% by weight of inorganic and/or organic particles with a median diameter d and where c) the polyester is composed of from 12 to 89 mol % of units derived from at least one aromatic dicarboxylic acid and of from 11 to 88 mol % of units derived from at least one aliphatic dicarboxylic acid, d) the ratio calculated from the particle size d e) said outer layer (A) exhibits a surface roughness, Ra, ranging from greater than 60 to 400 ηm, as determined via DIN 4768.