Title:
INJECTION FOAM MOLDED BODY
Document Type and Number:
WIPO Patent Application WO/2022/220258
Kind Code:
A1
Abstract:
The purpose of the present invention is to obtain an injection foam molded body that has rigidity, which is the characteristic of injection foaming, by using a molding method called injection foam molding, and has cushioning which is a characteristic that could not be obtained with a conventional injection foam molded body and in which softness is felt when pushing a foam molded body with a finger. The present invention pertains to an injection foam molded body composed of a propylene-based resin composition, the injection foam molded body being characterized in that: when a three-point bending test, in which a sample obtained by cutting the injection foam molded body into a size of 50 mm×150 mm is used and a force is applied to the center position of a support interval of 100 mm with an indenter at a bending speed of 50 mm/min, is conducted, the bending elastic gradient, which is evaluated in accordance with JIS K 7221-2, in a "load-deflection curve" obtained when the deflection is 0-10 mm is in the range of 27-1,000 (N/cm); and when a test, in which a force (load) is applied to a flat surface part of the injection foam molded body with a circular indenter having a diameter of 4 mm and a flat tip at a speed of 1 mm/min and the circular indenter is thus pushed into the molded body, is conducted, the pushing elastic gradient, which is an elastic gradient at the time of being pushed and is evaluated in accordance with JIS K 7220, in a "force-deformation amount curve" obtained when the reduction amount of the thickness of the injection foam molded body is 0-10% is in the range of 5-120 (N/mm).
Inventors:
KAWAMURA TATSUJI (JP)
Application Number:
PCT/JP2022/017678
Publication Date:
October 20, 2022
Filing Date:
April 13, 2022
Export Citation:
Assignee:
PRIME POLYMER CO LTD (JP)
International Classes:
B29C44/00; B29C44/42; B29C44/58; B29C44/60; B29C45/00; B29C45/26; B29C45/80; B29K23/00; B29K105/04
Foreign References:
| JP2017177671A | 2017-10-05 | |||
| JPH08318542A | 1996-12-03 | |||
| JP2012233055A | 2012-11-29 | |||
| JP2012000909A | 2012-01-05 | |||
| JPH08318542A | 1996-12-03 | |||
| JP2009196284A | 2009-09-03 | |||
| JP2009208299A | 2009-09-17 |
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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