Patent ID: 6190485
Filing Date: 2001-02-20
Classification: B31C,B65D,Y10S,Y10T

Abstract:
A method of manufacturing multi-ply tubular containers for products comprising the steps of:advancing a continuous body ply formed of paperboard towards a shaping mandrel, said body ply defining an inner surface;advancing a continuous polymeric liner ply adjacent to the inner surface of the paperboard body ply, the liner ply having a moisture barrier layer and an adhesive layer defining one surface of the liner ply, wherein the adhesive layer includes a polymeric adhesive which is activated at a predetermined activation temperature;passing the liner ply and the body ply in face-to-face contact through a pair of nip rollers with the adhesive layer of the liner ply adjacent to the body ply;heating at least a portion of the adhesive layer to a temperature above the activation temperature of the adhesive so that the liner ply becomes adhered directly to the inner surface body ply; and thenwrapping the body ply and adhered liner ply around the mandrel to create a tubular shape.