| 摘要 |
PROBLEM TO BE SOLVED: To provide a lightweight resin molded product excellent in high thermal conductivity, electric insulation, injection moldability, etc., and having high light resistance; and especially a substrate for LED mounting and a reflector disposed on the substrate for mounting, improving heat dissipation performance while exhibiting optical performance and not damaging merchantability. SOLUTION: The resin molded product with a degree of whiteness of 80 or more is obtained from a resin composition containing at least a thermoplastic polyester-based resin (A) and scale-shaped hexagonal boron nitride powders (B), the (B) having a number-average particle diameter of 15 μm or more, a degree of whiteness of 90 or more, and a graphitization index of 2.0 or less, and a volume ratio (A)/(B) being 85/15 to 25/75. In the molded product, a color difference ΔE between before and after irradiation is 10 or less when continuously irradiated with a 400W mercury-vapor lamp for 7 days from 10 cm distance in 120°C atmosphere, heat conductivity as the molded product is 2W/m×K or more, and a thermal deformation temperature is 150°C or higher, and further a surface electric resistance value is 10<SP>11</SP>Ω or more. COPYRIGHT: (C)2010,JPO&INPIT
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