RESIN COMPOSITION FOR LIGHT GUIDE BODY PREFORM LIGHT GUIDE BODY PREFORM LAMINATE LIGHT GUIDE BODY PREFORM LIGHT GUIDE BODY FOR AREA LIGHT SOURCE DEVICE AND AREA LIGHT SOURCE DEVICE

摘要

The present invention relates to a resin composition for light guide preforms capable of inexpensively forming a foamed layer having a large light scattering effect on the surface of a molded article by laser irradiation. More specifically, the mass average molecular weight is 60,000 to 150,000. 30% heat mass reduction temperature when carrying out thermal mass measurement at the temperature increase rate of 5 degree-C / min from resin at 100 degreeC in air is 310 degrees C or less, 40% heat mass reduction temperature, and 20% heat When thermal mass measurement is performed at a temperature increase rate of 5 ° C / min from a resin composition for a light guide preform having a difference in mass reduction temperature of 7 ° C or less, or a resin having a mass average molecular weight of 60,000 to 150,000 and nitrogen at 100 ° C. It relates to a resin composition for light guide preforms containing a silicone compound having a 90% thermal mass reduction temperature of 250 ° C or more and 650 ° C or less.