Patent ID: 7087312
Filing Date: 2006-08-08
Classification: B32B,Y10T

Abstract:
1. A polyester film comprising a base layer (B) and at least one overlayer (A), wherein the base layer (B) and the overlayer (A) comprise a mixture of thermoplastic polyester and poly(m-xyleneadipamide), said base layer (B) comprising from 5 to 20% poly(m-xyleneadipamide) based on the weight of the base layer (B), said overlayer (A) comprising from 10 to 90% poly(m-xyleneadipamide) based on the weight of the base layer (A), said film further comprising a layer (C) disnosed on lever (B) on the surface opposite layer (A), wherein said layer (C) alone comprises at least one anti-blocking agent and the film exhibiting an oxygen transmission of less than 30 cm 3 /(m 2 ·bar·d) based on 12 μm thick film and an interlaminar adhesion of greater than 1.5 N/25 mm.