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US 2024/0400781 A1Published application
Polyamide-based resin foam particles, polyamide-based resin composition, and production method
AssigneeAsahi Kasei Kabushiki Kaisha
InventorTakashi ONOE
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Abstract
Polyamide-based resin foam particles have an average cell diameter of 5 to 150 μm. Polyamide-based resin foam particles satisfy at least one of the following (A) and (B):(A) the ratio of X/Y of the internal communication ratio (X) to the closed cell ratio (Y) is 0.25 or less; and (B) the ratio Z/Y of the continuous cell ratio (Z) to the closed cell ratio (Y) is 0.25 or less.
Claims10
Polyamide-based resin foam particles having an average cell diameter of 5 to 150 μm and satisfying at least one of the following (A) and (B):
- (A) a ratio of X/Y of an internal communication ratio (X) to a closed cell ratio (Y) is 0.25 or less;
- and
- (B) a ratio Z/Y of a continuous cell ratio (Z) to a closed cell ratio (Y) is 0.25 or less.
A production method of polyamide-based resin foam particles, comprising:
- a water absorption step of causing a polyamide-based resin composition to absorb water to a water absorption ratio of 6 mass % or more;
- and
- an impregnation and foaming step of causing the polyamide-based resin composition in which water has been absorbed in the water absorption step to be impregnated with a foaming gas, and foaming to take place.
Dependencies are inferred from the claim text.