| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light reflector plate maintaining superior mechanical strength and light ray total reflectance over a long period of time even when used under high-temperature conditions. <P>SOLUTION: The light reflector plate is formed by molding a thermoplastic resin composition including 100 pts.wt. thermoplastic resin, 10-100 pts.wt. titanium oxide, and 1-15 pts.wt. silicone oil. Even when it is irradiated with light under a high temperature atmosphere of about 50-100°C, the oxidation degradation of the thermoplastic resin due to the titanium oxide is prevented by the presence of the silicone oil, and the degrading in the mechanical strength of the thermoplastic resin or yellowing is prevented. Thus, the light reflector plate maintains the superior mechanical strength and the light ray total reflectance over a long period of time. <P>COPYRIGHT: (C)2009,JPO&INPIT |
