PLASTIC HOLLOW LAMINATE AND PRODUCTION THEREOF

摘要

PURPOSE: To prevent an increase in the wt. per a unit area of a plastic hollow laminate and to enhance the bending rigidity thereof by superposing thermoplastic resin films one upon another to thermally weld them in such a state that one emboss apexes are brought into contact with other emboss bottom surfaces to form a two-layered core. CONSTITUTION: Thermoplastic resin sheets preheated by a heater are supplied to the nip between embossed rolls (a), (b) rotated in opposed relationship and embossed and thermally fused during the passage through the nip between two rolls to be integrated. By this method, the thermoplastic resin sheets are thermally fused simultaneously with emboss molding to form a tow-layered core 1. Heated thermoplastic resin sheets are thermally bonded to the upper and rear surfaces of the two-layered core 1 under pressure to obtain a plastic hollow laminate having a four-layered structure.