MULTILAYER FILM FOR RECLOSABLE PACKAGING WITH POLYPROPYLENE LAYER OBTAINED BY FLAT SHEET CO-EXTRUSION

摘要

Disclosed is (1) a multilayer film comprising: -an adhesive layer A consisting of a HMPSA composition (a); -a complexable thin layer B consisting of a composition (b) of a polypropylene (PP); and -a heat-sealable and breakable layer C consisting of a composition (c) of a polypropylene (PP); the layers B and C being bonded together by the layer A and said film being characterised in that the melt flow indices of the compositions (a), (b) and (c), denoted respectively MFI(a), MFI(b) and MFI(c), are such that the ratios MFI(a)/MFI(b) and MFI(a)/MFI(c) are each between 0.3 and 3.5. Also disclosed is (2) a method for producing the film according to (1), comprising the flat sheet co-extrusion of the composition (a) and compositions (b) and (c) at a temperature between 150°c and 250°c, and (3) the use of the multilayer film according to (1) for the manufacture of reclosable packages.