MANUFACTURING METHOD OF NON-STRETCHED FILM, MANUFACTURING METHOD OF RESIN-COATED METAL SHEET AND MANUFACTURING APPARATUS OF NON-STRETCHED FILM

摘要

PPROBLEM TO BE SOLVED: To provide a manufacturing method of a non-stretched film comprising a thermoplastic resin using a multi-kind and small-quantity production system, a manufacturing method of a resin-coated metal sheet constituted by coating a metal sheet with the thermoplastic resin by the multi-kind and small-quantity production system and a manufacturing apparatus of the non-stretched film comprising the thermoplastic resin by the multi-kind and small-quantity production system. PSOLUTION: A thermoplastic resin A used for forming the non-stretched film and a thermoplastic resin B other than the thermoplastic resin A are separately heated and melted to be guided to both end parts of an extrusion T-die and discharged so that the thermoplastic resin B is present on both sides of the heated and melted thermoplastic resin A in parallel to be extruded on a casting roll to form the non-stretched film wherein the thermoplastic resin B is present on both sides of the thermoplastic resin A in parallel. In this manufacturing method, the cross-sectional shape B3a (B3b) of the hole of the confluent part of the pipe for supplying the molten thermoplastic resin A and the pipe for supplying the molten thermoplastic resin B, both of which are drilled in both sides of the lower part of the pipe for supplying the thermoplastic resin A is set to an almost U-shape. PCOPYRIGHT: (C)2006,JPO&NCIPI