Patent ID: 7763347
Filing Date: 2010-07-27
Classification: B29C,C08J,C08L,Y10T

Abstract:
1. A thermoplastic resin foamed article, wherein the foamed article has two opposite surfaces, wherein the foamed article has at least a skin layer which defines one of the opposite surfaces and has a porosity of 0% or more but less than 1%, a lower-expansion layer which has a porosity of not less than 1% but less than 40% and is arranged so as to be adjacent to the skin layer, and a higher-expansion layer which has a porosity of not less than 40% but less than 100% and is arranged so as to be adjacent to the lower-expansion layer, wherein the skin layer, the lower-expansion layer and the higher-expansion layer are made of the same thermoplastic resin, wherein the higher-expansion layer has therein cells which have a ratio of D 1 to D 2 of from 2 to 4 wherein D 1 denotes the length of the cells in the thickness direction of the higher-expansion layer and D 2 denotes the length of the cells in a direction perpendicular to the thickness direction.