Coextruded, hot-sealable and peelable polyester film having low peeling resistance, process for its production and its use

摘要

The invention more particularly 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 APET, 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 2.0 to 8.0 mum (based on the mass of the top layer (A)), wherein c) the polyester being composed of 30-95 mol % of units which derive from at least one aromatic dicarboxylic acid and 5-70 mol % of units which derive from at least one aliphatic dicarboxylic acid, d) the ratio of particle size d₅₀ and layer thickness d_A of the top layer (A) being greater than 1.3 and e) the layer thickness of the top layer (A) d_A being from 0.5 to 2.5 mum.