| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermoplastic resin foam which is suitable for a backlight and an illumination box such as an illumination fascia, a lighting equipment, a display or the like, and which has a high reflectance ratio. SOLUTION: The thermoplastic resin foam is manufactured by a manufacturing method comprising: a process which makes a thermoplastic resin sheet contain inert gas by keeping it in a pressurized inert gas atmosphere; a process which heats the thermoplastic resin sheet containing inert gas and makes it to foam under an ordinary pressure; and a process which draws the foamed thermoplastic resin in at least uniaxial direction. COPYRIGHT: (C)2006,JPO&NCIPI |
