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

A scalable and peelable 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) about 80 to 98% by weight of polyester and
• b) about 2 to 10% by weight of inorganic and/or organic particles having an average diameter d50 of from 2.5 to 8.0 μm based on the mass of the top layer (A),
• wherein
• c) the polyester being composed of about 12 to 89 mol % of units which derive from at least one aromatic dicarboxylic acid and about 11 to 88 mol % of units which derive from at least one aliphatic dicarboxylic acid, the sum of the dicarboxylic acid derived molar percentages being 100,
• d) the ratio of particle size d50 and layer thickness dA of the top layer (A) being greater than about 1.2,
• e) the layer thickness of the top layer (A) dA being from about 1.0 to 5 μm and
• f) the sealing temperature, θ in ° C., and the peeling force, in N/15 mm, are correlated via the following equation:
• 0.02·θ/° C.−0.8≦peeling forceF/N per 15 mm≦0.04·θ/° C.+2.0.