| 摘要 |
PROBLEM TO BE SOLVED: To provide a stretched thermoplastic polyester resin having a small absolute value of a coefficient of linear expansion, reduced in expansion/contraction caused by a change in temperature, and lightweight and excellent in impact resistance, durability, workability, productivity, etc., particularly, a stretched thermoplastic polyester resin sheet which can be suitably used as an external-facing building material such as a rain gutter, and a manufacturing method for the stretched thermoplastic polyester resin sheet. SOLUTION: In the manufacturing method for the stretched thermoplastic polyester resin sheet, the thermoplastic polyester resin sheet with a coefficient of linear expansion of±1.0×10<SP>-5</SP>(1/°C) , and the thermoplastic polyester resin sheet in an amorphous state are drawn and stretched at a temperature of (glass-transition temperature of a thermoplastic polyester resin)±20°C; and after that, the thermoplastic polyester resin sheets are uniaxially stretched at a temperature higher than a drawing and stretching temperature at a total stretch ratio of≥3 and <5. COPYRIGHT: (C)2008,JPO&INPIT |
