Amorphous, thermoformable, UV-stabilized, flame retardant polyester film, useful in interior or exterior applications, comprising base layer with sealable and matt covering layers

摘要

An amorphous, UV-stabilized, flame retardant, sealable, coextruded thermoformable film, having one matt side and thickness 30-2000 mu m, comprises a base layer (B), at least one sealable covering layer (A) (having sealing onset temperature 110 deg C and sealing weld strength at least 1.3 N/15 mm) and at least one matt covering layer (C) (containing UV stabilizer(s) and a flame retardant). Layer (A) has surface roughness Ra value of less than 30 nm and measured gas flow value 500-4000 s and non-sealable layer (C) has Ra value 200-1000 nm and measured gas flow value 500-4000 s.