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US 9,802,867 B2Granted
Gypsum hardened body, gypsum panel, method for manufacturing gypsum hardened body, and method for manufacturing gypsum board
AssigneeYoshino Gypsum Co., Ltd.
InventorsUshio Sudo, Hiroaki Itano, Yosuke Sato, Tomoaki Sawada
Life of this patent
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Abstract
A gypsum hardened body including a gypsum slurry that has been hardened is provided. The gypsum slurry is obtained by mixing calcined gypsum, calcium hydrogen phosphate dihydrate, water, and foam. The specific gravity of the gypsum hardened body is greater than or equal to 0.3 and less than or equal to 0.8.
Claims13
A gypsum hardened body comprising:
- a gypsum slurry that has been hardened;
- wherein the gypsum slurry is obtained by mixing calcined gypsum, calcium hydrogen phosphate dihydrate, water, and foam;
- and
- wherein a specific gravity of the gypsum hardened body is greater than or equal to 0.3 and less than or equal to 0.8.
1 more element
A method for manufacturing a gypsum hardened body, comprising:
- a gypsum slurry manufacturing step for manufacturing a gypsum slurry by mixing calcined gypsum, calcium hydrogen phosphate dihydrate, water, and foam;
- a shaping step for shaping the gypsum slurry into a shaped body;
- and
- a hardening step for hardening the shaped body obtained in the shaping step to obtain the gypsum hardened body;
- wherein a specific gravity of the obtained gypsum hardened body is greater than or equal to 0.3 and less than or equal to 0.8.
2 more elements
A method for manufacturing a gypsum board, comprising:
- a gypsum slurry manufacturing step for manufacturing a gypsum slurry by mixing calcined gypsum, calcium hydrogen phosphate dihydrate, water, and foam;
- a shaping step for arranging the gypsum slurry between base paper and shaping the gypsum slurry into a shaped body;
- and
- a hardening step for hardening the shaped body obtained in the shaping step to obtain the gypsum hardened body;
- wherein a specific gravity of the obtained gypsum hardened body is greater than or equal to 0.3 and less than or equal to 0.8.
2 more elements
Dependencies are inferred from the claim text.