VERFAHREN ZUR HERSTELLUNG EINER THERMOPLASTISCHEN HARZFOLIE UND DERGLEICHEN UND EXTRUDERSCHNECKE HIERFUER.

摘要

This invention relates to a process of producing sheet and the like from thermoplastic resin and a screw used therefor. The resin extruder (1) includes a cylinder (3) and the screw (4). The resin is passed through a feeding section (11), a compressing section (12), a metering section (13), a mixing section (14), a shearing section (15) and a stress relaxing section (16), which are successively positioned from a resin feeding side to a resin extruding side, and a molten film-shaped resin is extruded, and this film-shaped resin is passed in the flowing direction of cooling water to be cooled.