| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat treatment method of a deformed lengthy molding which relaxes stress remaining in the molding when the deformed lengthy molding is subjected to thermoforming such as extrusion molding. SOLUTION: In the heat treatment method of the deformed lengthy molding, the thermoformed deformed lengthy molding 7 of a thermoplastic resin is supplied to a heating vessel 6 whose temperature is set to be in a range of the glass transition temperature of the thermoplastic resin of±20°C, conveyed and annealed while being held by a guide roll which is installed in the heating vessel and fits the side and the bottom surface of the lengthy molding. COPYRIGHT: (C)2008,JPO&INPIT |
