Patent ID: 8043672
Filing Date: 2011-10-25
Classification: B29C,B29K,B29L,F21S,Y10T

Abstract:
1. A lens for a vehicular lamp, the lens which is integrally formed of plastic molded portions having plurality of colors by injection molding, comprising: a first plastic molded portion having a first number average molecular weight; and a second plastic molded portion having a second number average molecular weight which is smaller than the first molecular weight, wherein the second plastic molded portion is injected after the first plastic molded portion is injected, wherein the first and second plastic molded portions are made of acrylic resins including polymethyl methacrylate, and a number average molecular weight of the acrylic resin constituting the first plastic molded portion is larger than a molecular weight of the acrylic resin constituting the second plastic molded portion by 20,000 or more.