Patent ID: 8906185

Claim:
A method for producing a primary laminate including a tabstock comprising the steps of: (a) feeding a seal laminate including a heat seal layer, a foil layer and a top foam layer between opposing rollers of a laminating station; (b) continuously feeding a tabstock, which is narrower than the seal laminate, towards the laminating station such that the bottom of the tabstock and the top foam layer of the seal laminate come into non-adhesive contact to form a primary substrate, the top face of which is partly comprised of the top face of the tabstock and partly comprised of the top foam layer of the seal laminate prior to reaching the laminating station; (c) continuously feeding a plastic film stock which has top and bottom surfaces to the laminating station, so the bottom surface of the plastic film stock is in contact with the top face of the primary substrate; and (d) continuously extruding a flowable polymeric adhesive which is a random copolymer of ethylene and alkylacrylate having a melt flow index in the range from 1 to 10 dg/min (190° C., 2.16 kg) as a liquid curtain directly to a nip formed between opposing surfaces of the opposing rollers and between the top face of the primary substrate and bottom surface of the plastic film stock and cooling so that the foam and the plastic film are adhered together wherein a temperature of flowable polymeric adhesive at the nip is greater than a melting point of the top foam layer.