Patent ID: 9200173
Filing Date: 2015-12-01
Classification: B41M,C08J,C09D,Y10T

Abstract:
1. A modified polyvinyl alcohol coated film for printing, comprising sequentially a coating layer, a primer layer and a substrate, wherein said coating layer comprises sequentially an acrylic coating layer and a modified polyvinyl alcohol coating layer, and said modified polyvinyl alcohol coating layer contacts with said primer layer; said modified polyvinyl alcohol coating layer is formed by applying a modified polyvinyl alcohol coating composition comprising 50% to 100% by weight of a modified polyvinyl alcohol solution, 0 to 40% by weight of demineralized water, 0 to 10% by weight of a first slip agent and 0 to 4% by weight of a first anti-adhesion agent onto a surface of said primer layer and drying; said modified polyvinyl alcohol solution is formed by crosslinking reaction between 80% to 95% by weight of polyvinyl alcohol and 5% to 20% by weight of urea; said acrylic coating layer is formed by applying an acrylic coating composition comprising 25% to 95% by weight of an acrylic emulsion, 0 to 70% by weight of demineralized water, 2% to 15% by weight of a second slip agent and 0.1% to 5% by weight of a second anti-adhesion agent onto the surface of said modified polyvinyl alcohol coating layer and drying; said acrylic emulsion is formed of a copolymer consisting of 10% to 80% by weight of acrylic acid and 20% to 90% by weight of methyl acrylate or ethyl acrylate; said acrylic coating layer allows to improve printability; said substrate is a biaxially oriented polypropylene film or a biaxially oriented polyurethane film, and said substrate is corona treated; and said primer layer is a coating layer formed of a waterborne polyurethane or waterborne acrylics.