Injection foam molded body
AssigneePrime Polymer Co., Ltd.
InventorTatsuji KAWAMURA
Life of this patent
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Abstract
An injection foam molded body composed of a propylene resin composition, when a sample having a size of 50 mm×150 mm cut from the injection foam molded body is used to carry out a three-point bending test in which force is applied to the center position of the body with a distance between supports of 100 mm by an indenter at a bending rate of 50 mm/min, a bending elastic gradient within the range of 27 to 1,000 (N/cm), and when the injection foam molded body is subjected to a test in which a force (load) is applied to a flat surface thereof by a circular indenter with a flat tip having a diameter of 4 mm at a rate of 1 mm/min to push the indenter into the molded body, a press elastic gradient is in the range of 5 to 120 (N/mm).
Claims10
An injection foam molded body composed of a propylene resin composition, wherein when a sample having a size of 50 mm×150 mm cut from the injection foam molded body is used to carry out a three-point bending test in which force is applied to the center position of the body with a distance between supports of 100 mm by an indenter at a bending rate of 50 mm/min, a bending elastic gradient evaluated in accordance with JIS K7221-2 is within the range of 27 to 1,000 (N/cm) in a “load-deflection curve” obtained for the amount of deflection in a range of 0 to 10 mm, and when the injection foam molded body is subjected to a test in which a force (load) is applied to a flat surface thereof by a circular indenter with a flat tip having a diameter of 4 mm at a rate of 1 mm/min to push the indenter into the molded body, a press elastic gradient is in the range of 5 to 120 (N/mm), which is an elastic gradient upon pushing, as evaluated in accordance with JIS K7220, in a “force-amount of deformation curve” obtained for a decrease in thickness of the injection foam molded body in a range of 0 to 10%.
Dependencies are inferred from the claim text.