Patent ID: 6537407
Filing Date: 2003-03-25
Classification: B32B,Y10T

Abstract:
A process for the manufacture of a laminate which comprises a cellulose diacetate film having on its front surface a regular embossed pattern of protrusions having a height in the range of 0.5 to 10 microns and a separation in the range 20 to 400 microns, laminated on its rear surface to a substrate, which process includes the steps of applying a layer of a melt adhesive having a melting point between 140 and 180Â° C. as a coating to the rear surface of the film having said regular embossed pattern on its front surface, subsequently running the film bearing the layer of adhesive on its rear surface over a heated roller with the front surface of the film in contact with the roller to soften the adhesive, and then running a composite of the film, the layer and the substrate with the layer of adhesive between the film and the substrate between nip rollers to apply pressure to the composite whilst the adhesive is in a heated condition, so as to effect thermal lamination of the film to the substrate.