| 摘要 |
This invention provides a process for producing a nonstretched film formed of a thermoplastic resin, a process for producing a resin coated metal plate coated with a thermoplastic resin, and an apparatus for producing a nonstretched film formed of a thermoplastic resin. In this production process, a thermoplastic resin A to be formed into a nonstretched film, and another thermoplastic resin B other than the thermoplastic resin A are heat melted separately from each other and are led respectively to both ends of an extrusion T die, followed by delivery of the melts in such a manner that the thermoplastic resin B coexists on both sides of the heat melted thermoplastic resin A, whereby the assembly is extruded onto a casting roll to form a nonstretched film comprising the thermoplastic resin B provided on both sides of the thermoplastic resin A. A hole at a part where a tube for supplying a melt of the thermoplastic resin A and a tube for supplying a melt of the thermoplastic resin B meet each other, formed by boring on both sides of the lower part of a tube for supplying the thermoplastic resin A has an approximately U-shaped section (B3a, B3b).
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