Multilayer protective film based on pvdf and pmma

摘要

Use of a multilayer film (A) to protect a substrate (S) that releases volatile compounds. (A) comprises (i) a surface layer (A1) comprising 70-100, preferably 90-100, % fluorinated polymer (FP) and (ii) an adhesive layer (A2) comprising 50-100% acrylic polymer (AP), 0-50% FP, 1-10% anti-Uv additive (I) and 0-50% shock modifier (II). The new feature is that A1 is 2-15, best 3-8, microns thick and A2 is 30-75, best 30-50, micron thick. An independent claim is included for a multilayered structure (I) comprising, in sequence, a (ligno)cellulosic material impregnated with glue (either on the surface or in the bulk); A2 and A1.