Membrane material for gas holder and gas holder using the same
View Patent ↗There is provided a membrane material for a gas holder having abrasion resistance and flex resistance usable as a gas holder, in addition to strength of a base fabric, and having high gas barrier properties. A membrane material for a gas holder, which is used in a gas holder for storing or recovering gas, includes at least 4 layers of a protective layer, a base fabric layer, a gas barrier layer and a protective layer laminated in this order.
1. A membrane material for a gas holder, which is used in a gas holder for storing or recovering gas, comprising at least 4 layers of a protective layer, a base fabric layer, a gas barrier layer and a protective layer laminated in this order,
wherein at least one protective layer constituting the membrane material comprises a polyolefin resin,
wherein a film-like polyurethane resin layer is laminated on one surface or both surfaces of the base fabric layer.
2. The membrane material for a gas holder according to claim 1 , wherein the base fabric is a woven fabric, and the product of the fineness (dtex) of yarns and the density (ends/inch) thereof is from 2,500 to 5,000.
3. The membrane material for a gas holder according to claim 1 , wherein the polyurethane resin layer has a thickness of 5 to 50 μm.
4. A gas holder comprising the membrane material for a gas holder according to claim 1 .
5. The membrane material for a gas holder according to claim 2 , wherein the polyurethane resin layer has a thickness of 5 to 50 μm.
6. A gas holder comprising the membrane material for a gas holder according to claim 2 .
7. A gas holder comprising the membrane material for a gas holder according to claim 3 .
8. A gas holder comprising the membrane material for a gas holder according to claim 5 .
9. The membrane material for a gas holder according to claim 1 , wherein the gas barrier layer is at least laminated on the film-like polyurethane resin layer-laminated side of the base fabric layer.
10. The membrane material for a gas holder according to claim 1 , wherein a resin used for the protective layer is at least one selected from the group consisting of a polyethylene resin, a polyurethane resin (excepting the film-like polyurethane resin previously laminated on the base fabric layer), a vinyl chloride resin, an acrylic resin and a polyester resin.
11. The membrane material for a gas holder according to claim 2 , wherein a material used for the woven fabric is at least one selected from the group consisting of a polyester, a nylon, a carbon fiber, an aramid fiber and a glass fiber.
12. The membrane material for a gas holder according to claim 1 , wherein a film used for the gas barrier layer is at least one selected from the group consisting of a polyethylene naphthalate film, a polyamide film, a polyvinylidene chloride film and an ethylene-vinyl alcohol copolymer film.
13. The membrane material for a gas holder according to claim 1 , wherein a basis weight of the base fabric layer is from 20 to 100 g/m 2 .
14. The membrane material for a gas holder according to claim 1 , wherein a thickness of the gas barrier layer is from 3 to 30 μm.
15. The membrane material for a gas holder according to claim 1 , wherein a thickness of the protective layer used on the base fabric layer side or the gas barrier layer side is from 5 to 180 μm.
16. The membrane material for a gas holder according to claim 1 , wherein a total thickness of the membrane material is from 150 to 300 μm.