Patent ID: 7195815
Filing Date: 2007-03-27
Classification: B29C,Y10T

Abstract:
1. A foamed body of a thermoplastic resin comprising an expanded inner layer portion and two surface layer portions having the inner layer portion sandwiched therebetween and formed integrally therewith, wherein: each of the surface layer portions has a thickness of 0.1 mm to 3.0 mm and comprises a nonexpanded structure or an expanded structure greater than 0 and up to 10 μm in cell diameter, the expanded inner layer portion having cells greater than 0 and up to 6.0 mm in average cell diameter in a direction parallel to the plane and including at least 70% of open cells in a direction perpendicular to the plane, and including at least 65% of cells which are 2 to 6 in the ratio of the cell diameter thereof in a direction perpendicular to the plane to the cell diameter thereof in a direction parallel to the plane, the foamed body comprises an expanded structure greater than 0 and up to 0.20 g/cm