Patent ID: 6548428
Filing Date: 2003-04-15
Classification: B32B,C08G,G03G,Y10T

Abstract:
A multilayer material of a heat-activated supporting film having defined shrinkability on a polyester substrate comprising:a polyester substrate having a first surface and a second surface, wherein the first surface has been surface-treated in a corona discharge unit; a polyurethane polymer adhered to the first surface and consisting essentially of the reaction product of a plurality of hydroxyl groups having a hydroxyl number below 5 and a linear polyisocyanate in a ratio of 20:1 with reference to solid polyurethane polymer, wherein the first surface is sufficiently roughened to facilitate bonding between the substrate and the polyurethane polymer; and an additive, wherein said additive is selected to be a catalyst to facilitate polymerization of the coating mixture in less than about 48 hours, a pigment, a colorant, or a mixture thereof.