Gasket sheet
AssigneesNichias Corporation, Japan Exlan Company Limited
InventorsYasushi Tsuchimoto, Shiro Takahata, Kiyotaka Shimada, Koji Tanaka, Susumu Aoki, Tsutomu Yamamoto, Masaaki Ashizawa, Kazuo Nishimoto
Life of this patent
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Abstract
A gasket sheet obtained by the milling and vulcanization of 50-85% by weight of a fibrous material, 10-50% by weight of a rubber material and at least 1-23% by weight of a water-insoluble and -swelling substance. The gasket sheet may be a one layer or a three layer sheet.
Claims13
A molded and vulcanized three-layer gasket sheet comprising an intermediate layer and an outer layer laminated on each side of said intermediate layer,
- said intermediate layer comprising 50-85% by weight of a fibrous material selected from the group consisting of asbestos, glass, carbon, phenol and cellulose fibers, 10-50% by weight of a rubber material selected from the group consisting of styrene butadiene rubber, nitrile-butadiene rubber and natural rubber and 1-23% by weight of a water-insoluble and -swelling substance, and
- said outer layers comprising 50-85% by weight of a fibrous material selected from the group consisting of asbestos, glass, carbon, phenol and cellulose fibers, 10-50% by weight of a rubber material selected from the group consisting of styrene butadiene rubber, nitrile-butadiene rubber and natural rubber and 1-38% by weight of a water-insoluble and -swelling material.
A molded and vulcanized three-layer gasket sheet comprising an intermediate layer and an outer layer laminated on each side of said intermediate layer,
- said intermediate layer comprising 50-85% by weight of a fibrous material selected from the group consisting of asbestos, glass, carbon, phenol and cellulose fibers, 10-50% by weight of a rubber material selected from the group consisting of styrene butadiene rubber, nitrile-butadiene rubber and natural rubber and 1-23% by weight of a fibrous water-insoluble and -swelling substance, and
- said outer layers comprising 50-85% by weight of a fibrous material selected from the group consisting of asbestos, glass, carbon, phenol and cellulose fibers, 10-50% by weight of a rubber material selected from the group consisting of styrene butadiene rubber, nitrile-butadiene rubber and natural rubber and 1-38% by weight of a granular, water-insoluble and -swelling material.
A molded and vulcanized three-layer gasket sheet comprising an intermediate layer and an outer layer laminated on each side of said intermediate layer,
- said intermediate layer comprising 60-66% by weight of a fibrous material selected from the group consisting of asbestos, glass, carbon, phenol and cellulose fibers, 10-15% by weight of a rubber material selected from the group consisting of styrene butadiene rubber, nitrile-butadiene rubber and natural rubber, 4-28% by weight of filler or vulcanizers and 2-15% by weight of a water-insoluble and -swelling substance, and
- said outer layers comprising 60-66% by weight of a fibrous material selected from the group consisting of asbestos, glass, carbon, phenol and cellulose fibers, 10-15% by weight of a rubber material selected from the group consisting of styrene butadiene rubber, nitrile-butadiene rubber and natural rubber, 4-28% by weight of filler or vulcanizers and 2-15% by weight of a granular, water-insoluble and -swelling material.
Dependencies are inferred from the claim text.