Patent ID: 6924041
Filing Date: 2005-08-02
Classification: B32B,C08L,Y10T

Abstract:
1. A polyolefin multilayer film comprising a polyolefinic core layer, and a first polyolefin skin layer, adjacent to the core layer, comprising a butene propylene copolymer that contains from 5 wt % to 22 wt % of butene wherein the first polyolefin skin layer does not contain a thermoplastic or natural rubber and provides a cold seal receptive surface for a cold seal adhesive, further comprising a second polyolefin skin opposite the core layer from said first polyolefin skin layer, wherein said second polyolefin skin layer is made of a polypropylene resin with the endothermic main peak of crystal fusion in a range of 155 to 163° C. and with a heat of crystal fusion in the range of 20 to 90 J/g.