RELEASABLE PROTECTIVE FILM AND ITS COMPOSITION.

摘要

A releasable protective film consists of (A) 85-20 wt.% of a random propylene-butene copolymer iwth a MFI of 0.1-100 g/10 minutes (ASTM D 1238-65T, 230 deg.C), a propylene content of 60-85 mol.% and a heat of crystal fusion of 20-80 Joule/g determined using a differential scanning calorimeter (B) 15-8 w.% of an ethylene-alpha olefin copolymer with a MFI of 0.1-100 g/10 minutes, an ethylene content of 75-95 mol.%, a crystallinity of 0-30%, and the alpha-olefin contains 3-10C atoms, and (C) 0-10 wt.% of a tackifier.