Patent ID: 6815047
Filing Date: 2004-11-09
Classification: B29C,Y10T

Abstract:
A foamed thermoplastic resin sheet, having a foaming ratio of not less than 2.4, wherein cells, existing in an interior part which extends inward from a depth of 20 percent of the whole thickness of said sheet from the front and rear surfaces thereof, respectively, in a thickness direction thereof and from 15 percent of the width of said sheet from both side edges, respectively, satisfy the following expressions (1) and (2):0.5&lE;D/C&lE;0.9â€ƒâ€ƒ(1) 0.5&lE;E/C&lE;0.9â€ƒâ€ƒ(2) where C represents a mean cell diameter in the thickness direction of said foamed thermoplastic resin sheet, D represents a mean cell diameter in an extrusion direction of the same, and E represents a mean cell diameter in the width direction of the same.