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US 12,209,169 B2Granted
Foam molded article
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsYoshie Takahashi, Masashi Hamabe, Masayoshi Imanishi, Toshifumi Nagino
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Abstract
A foam molded article includes a main agent resin, a filler of greater than or equal to 15% by mass and less than or equal to 80% by mass, and a foaming agent of greater than or equal to 0.01% by mass and less than or equal to 10% by mass, and a foaming ratio caused by the foaming agent is greater than or equal to 1.1 times.
Claims7
A foam molded article produced from a mixture composition comprising:
- a main agent resin;
- a mixture of fibrous fillers of celluloses with different fibrous filler aspect ratios;
- and
- a plurality of foam cells formed by a foaming agent,
- wherein a foaming ratio caused by the foaming agent is 1.1 times or more,
- the fibrous fillers include a first fiber having a first aspect ratio (length (L)/diameter (d)) and a second fiber having a second aspect ratio (L/d),
- the first aspect ratio of the first fiber is less than or equal to 2 and the second aspect ratio of the second fiber is greater than or equal to 10, and
- the proportion of the first fiber is greater than or equal to 50% and less than or equal to 70% of the fibrous fillers, and the proportion of the second fiber is greater than or equal to 1% and less than or equal to 10% of the fibrous fillers, and
- wherein the foam molded article includes a core inner layer that includes the main agent resin, the fibrous fillers, and the plurality of foam cells,
- the core inner layer including a first surface and a second surface that are opposite to each other,
- the foam molded article further comprises:
- a first core surface layer that is positioned on the first surface of the core inner layer,
- a second core surface layer that is positioned on the second surface of the core inner layer,
- a first skin layer that is positioned on the first core surface layer, and
- a second skin layer that is positioned on the second core surface layer,
- a total amount of the fibrous filler in the first skin layer and the second skin layer relative to an amount of fibrous filler in the core inner layer is 1.05 or more and 1.6 or less, and
- a total amount of the fibrous filler in the first core surface layer and the second core surface layer relative to the amount of fibrous filler in the core inner layer is 1.02 or more and 1.5 or less.
14 more elements
Dependencies are inferred from the claim text.