Patent ID: 6352762
Filing Date: 2002-03-05
Classification: C08J,C09D,Y10T

Abstract:
A polyamide film that adheres easily, comprising:a water-based coating mixture with a solid weight ratio of main components A/B/C=98Ëœ30/2Ëœ70/0.1Ëœ10; wherein component A of the coating mixture is an aqueous dispersion of polyurethane containing a non-ionic surface agent that is: acetylene glycol in which each carbon atom immediately adjacent to a triple-bonded carbon atom is substituted with a hydroxyl group and a methyl group, and/or an ethylene oxide addition product of said acetylene glycol; and wherein the polyurethane has a glass transition-temperature between 40Â° C. and 150Â° C.; wherein component B of the coating mixture is a water-soluble polyepoxy compound; wherein component C of the coating mixture comprises particles with an average particle diameter between 0.001 and 1.0 &mgr;m; wherein the coating mixture is present in an amount between 0.005 and 0.030 g/m2, based on dry weight; wherein the polyamide film is either unstretched or is uniaxially stretched and non-heated before being coated with the coating mixture; and wherein after being coated with the coating mixture, the polyamide film is stretched in at least one direction and heated.