| 摘要 |
PURPOSE: A polyamide composition is provided to have excellent surface reflectivity, surface gloss, mechanical strength, and processability, thereby useful for manufacturing a molded product like a reflective plate, of which reflectivity is degraded a little according to time after operating an LED. CONSTITUTION: A polyamide composition comprises a crystalline polyamide resin of which glass transition temperature is 50-100 °C, a crystalline polyamide resin of which glass transition temperature is 110-160 °C, an inorganic filler, white pigment, and a photostabilizer. The polyamide resin composition has surface gloss of 85% or more at the angle of 60°, and has surface gloss of 70-100% to light with the wavelength of 440 nm, after exposed to 120 hours to an LED light source with the wavelength of 460 nm, in an 85°C/85% constant temperature tank.
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