Patent ID: 8221876
Filing Date: 2012-07-17
Classification: B29C,B29K,C08J,Y10T

Abstract:
1. A skin-covered propylene resin foamed molded article consisting of a propylene resin skin layer of a propylene resin hollow molded body obtained by blow molding, and a molded article of expanded propylene resin beads placed within the skin layer, wherein a base resin of which the skin layer is formed comprises: a mixed resin composed of propylene resin obtained by polymerization using a metallocene polymerization catalyst and another propylene resin having a melt tension in the range of 2 to 30 cN at 230° C., the base resin having a partial heat of fusion in a temperature range between 80° C. and 140° C. of 15 to 70 J/g, a ratio of the partial heat of fusion to a total heat of fusion of 0.25 to 0.7, and an endothermic peak whose peak temperature being present in a temperature range of 115° C. to 140° C. as measured by heat flux differential scanning calorimetry, and a melt tension in the range of 2 to 30 cN 230° C., the skin layer has a thickness in the range of 0.3 to 2.0 mm, the molded article of expanded propylene resin beads has an apparent density in the range of 0.015 to 0.15 g/cm the skin layer is fuse-bonded to the molded article of expanded propylene resin beads, and wherein the expanded beads from which the molded article is formed are fuse-bonded to each other.