Patent ID: 9511567
Filing Date: 2016-12-06
CPC Classification: B32B,Y10T

Claim Text:
1. A multilayer structure comprising a polypropylene layer which is Layer A, a tie layer which is Layer B, and a barrier layer which is Layer C, each layer having opposing facial surfaces in adhering contact with the other layer, wherein: Layer A has a top facial surface and a bottom facial surface and comprises polypropylene; Layer B has a top facial surface and a bottom facial surface and comprises: Layer C comprises a polyamide (PA) or ethylene vinyl alcohol (EVOH) and has a top facial surface and a bottom facial surface, wherein the top facial surface of Layer C is in adhering contact with the bottom facial surface of Layer B, and the top facial surface of Layer B is in adhering contact with the bottom facial surface of Layer A, wherein the crystalline block copolymer composite of Layer B is present in an amount of at least 40 weight percent based on total polymer weight in Layer B, and wherein Layer B provides an interlayer adhesion value between Layer A and Layer C of greater than 7 N/15 mm before and after the multilayer structure is subjected to a retort process.