Hot-press cushion material and manufacturing method of the same
AssigneeYamauchi Corporation
InventorAkira Yoshida
Life of this patent
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Abstract
A hot-press cushion material is a complex comprising paper formed of a fiber material and a rubber impregnated in the paper, and the volume ratio between the fiber material and the rubber is within a range of 1/1.5 to 1/7.5, and the void ratio in the complex is within a range of 60 to 90%.
Claims13
A hot-press cushion material consisting of a paper sheet formed of a fiber material and a vulcanized rubber impregnated in said paper sheet, wherein
- said vulcanized rubber covers the fiber material,
- voids are present among said fiber material covered by said vulcanized rubber,
- the volume ratio between said fiber material and said vulcanized rubber is within a range of 1/2.5 to 1/6,
- the void ratio in said hot-press cushion material is within a range of 65 to 80%,
- the thickness of said paper sheet is within a range of 0.1 to 1.0 mm, and
- said fiber material is glass.
A manufacturing method of a hot-press cushion material formed by a wet papermaking process and consisting of a paper sheet formed of a fiber material and a vulcanized rubber impregnated in said paper sheet, the method comprising:
- a step of permeating said paper sheet with an unvulcanized rubber solution,
- a step of drying said unvulcanized rubber solution permeated in said paper sheet, and
- a step of vulcanizing the dried unvulcanized rubber,
- wherein said vulcanized rubber covers the fiber material, and voids are present among said fiber materials covered by said vulcanized rubber,
- wherein the volume ratio between said fiber material and said vulcanized rubber is within a range of 1/2.5 to 1/6,
- wherein the void ratio in said hot-press cushion material is within a range of 65 to 80%,
- wherein the thickness of said paper sheet is within a range of 0.1 to 1.0 mm, and
- wherein said fiber material is glass.
Dependencies are inferred from the claim text.