Thermoplastic resin foamed sheet
AssigneesSumitomo Chemical Company, Limited, Sumika Plastech Co., Ltd.
InventorsSatoshi Hanada, Yoshinori Ohmura
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Abstract
Disclosed is a thermoplastic resin foamed sheet wherein pillar-shaped resin portions observed in a cross section in the thickness direction of the sheet satisfy requirement (1): the number density of pillar-shaped resin portions intersecting the thickness centerline of the foamed sheet is from 1 to 20 pillars/mm-centerline and requirement(2): the average thickness of pillar-shaped resin portions intersecting the thickness centerline of the foamed sheet is from 10 to 500 μm.
Claims5
A thermoplastic resin foamed sheet wherein pillar-shaped resin portions observed in a cross section in the thickness direction of the sheet satisfy requirements (1) and (2) defined below:
- (1) the number density of pillar-shaped resin portions intersecting the thickness centerline of the foamed sheet is from 1 to 20 pillars/mm-centerline;
- (2) the average thickness of pillar-shaped resin portions intersecting the thickness centerline of the foamed sheet is from 10 to 500 μm.
Dependencies are inferred from the claim text.