Title:
INJECTION FOAM MOLDED BODY
Document Type and Number:
WIPO Patent Application WO/2022/220148
Kind Code:
A1
Abstract:
The objective of the present invention is to obtain, by using a molding method called injection foam molding, an injection foam molded body which, while having the stiffness as a characteristic of injection foaming, also has cushioning properties giving soft sensation when the injection foam molded body is pressed with a finger, the properties not being obtainable with conventional injection foam molded bodies. The present invention relates to an injection foam molded body which is composed of a propylene-based resin composition and is characterized in that: when a three-point bending test is carried out in which a sample cut out from the injection foam molded body in a size of 50 mm × 150 mm is used and a force is applied to a central position of a supporting interval of 100 mm with an indenter at a bending speed of 50 mm/min, in a "load-deflection curve" obtained with a deflection amount being between 0 and 10 mm, a bending elasticity gradient evaluated pursuant to JIS K7221-2 is in a range of 27-1,000 (N/cm); and when a test of pressing a round indenter of 4 mm in diameter with a flat fore end into a flat portion of the injection foam molded body by applying a force (load) at a speed of 1 mm/min is carried out, in a "force-deformation amount curve" obtained with the amount of reduction in the thickness of the injection foam molded body being between 0 and 10%, the pressing elasticity gradient, which is an elasticity gradient upon pressing evaluated pursuant to JIS K7220, is in a range of 5-120 (N/mm).
Inventors:
KAWAMURA TATSUJI (JP)
Application Number:
PCT/JP2022/016438
Publication Date:
October 20, 2022
Filing Date:
March 31, 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 |
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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