Patent ID: 6780522
Filing Date: 2004-08-24
Classification: B32B,B82Y,C08J,C08K,Y10T

Abstract:
Multi-layer film having at least one layer (I) of polyamide with nano-scale nucleating particles dispersed therein, wherein said nano-scale nucleating particles have an aspect ratio of at least 10 in two randomly selectable directions, and, as a number-weighted average, a dimension no greater than 100 nm in at least one direction that is randomly selectable for each consent, having crystalline structures that emanate from the surface of the particles, the amount by weight of the particles, based on the total weight of the polyamide forming the layer (I), is from 10 ppm to 2000 ppm, the polyamide forming the layer (I) contains at least 90% polyamide 6, based on the total mass of the polyamide in that layer and comprising further polyamide-containing layers (II) containing no or less than 10 ppm nano-scale nucleating agent.