Coextruded, hot-sealable and peelable polyester film, process for its production and its use

摘要

This invention relates to a coextruded, transparent, biaxially oriented polyester film comprising a base layer (B) and a heatsealable top layer (A) which is peelable from at least CPET, the heatsealable and peelable top layer (A) consisting of a) 80-98 % by weight of polyester and b) 2-10 % by weight of inorganic and/or organic particles having an average diameter d50 of from 2.5 to 12.0 mum (based on the mass of the top layer (A)), wherein c) the polyester is composed of 12-89 mol % of units derived from at least one aromatic dicarboxylic acid and 11-88 mol % of units derived from at least one aliphatic dicarboxylic acid, the sum of the dicarboxylic acid-derived molar percentages being 100, d) the ratio of particle diameter d50 and layer thickness dA of the top layer (A) being greater than/equal to 1.0 and e) the layer thickness of the top layer (A) dA being from 2.3 to 10.0 mum. The invention further relates to a process for producing the film and to its use.