Patent ID: 6479576
Filing Date: 2002-11-12
Classification: B32B,Y10T

Abstract:
A multi-layer film comprising(a) at least one first layer of polyamide; (b) at least one second layer of polyethylene or an ethylene-copolymerisate containing fine-particulate titanium dioxide, a majority of the titanium dioxide particles having a diameter of between 5 and 30 nm and lengths which are at least three times their diameter; (c) optionally at least one ethylene/vinyl alcohol-copolymerisate-containing third layer; and (d) at least one bonding layer, wherein said multi-layer film has a value of from 5 to 200, as determined from the summation of the product of the following equation (I) for all second layers of said multi-layer film, (AÃ—B)â€ƒâ€ƒ(I) equation (I) being calculated for each second layer, in equation (I) A is the thickness of said second layer in micrometers, and B is the weight percent of titanium dioxide particles in said second layer, based on the total weight of said second layer.