Patent ID: 6599387
Filing Date: 2003-07-29
Classification: B32B

Abstract:
A method for the production of a flat composite from at least two plastic parts, a first plastic part and a second plastic part, each having a first and a second surface, wherein said first surfaces are adhesion surfaces and wherein said first plastic part is polymer A and said second plastic part is polymer B, comprising the steps of:(a) preheating said adhesion surfaces of said first and second plastic parts to a temperature of 10 to 100Â° K. above the Vicat softening point of said polymer A and polymer B, with the proviso that said plastic parts retain their original shape during said preheating step; (b) pressing said first and second plastic parts between a first and a second rolls without the positioning of an auxiliary adhesion or film material between the first and second plastic parts, said rolls having been provided with means for exerting a pressing force so that said preheating adhesion surface of said first plastic part contacts with said preheated adhesion surface of said second plastic part; and (c) advancing said first and second plastic parts between said rolls at an advance rate of 5 to 200 mm/sec while exerting a pressing force of 10 to 500 N.