Gas adsorption sheet and air-purifying filter
AssigneeToyobo Co., Ltd.
InventorsShinichi Minemura, Masayuki Imagawa
Life of this patent
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Abstract
The gas adsorption sheet of the present invention has a granular activated carbon-containing sheet comprising a granular activated carbon having an average particle diameter of 60 to 600 μm, a supporting fiber for fixing the granular activated carbon in contact with it, and an adhesive fiber which mainly contributes to shape retention. An air-purifying filter of the present invention is obtained by forming the gas adsorption sheet into a shape of pleats or wave. A method for producing a gas adsorption sheet of the present invention comprises a step of forming a granular activated carbon-containing sheet by using an aqueous slurry containing a granular activated carbon, a supporting fiber and a water-swelling adhesive fiber.
Claims13
A gas adsorption sheet comprising:
- a granular activated carbon-containing sheet comprising a granular activated carbon having an average particle diameter of 100 to 600 μm, a supporting fiber with a fiber diameter of 15 μm or more for fixing the granular activated carbon in contact with it, and an adhesive fiber which contributes to shape retention and is a water-swelling fiber, wherein the granular activated carbon-containing sheet is integrally formed by wet bonding and has a first surface zone containing supporting fibers and no granular activated carbon on a first surface, and a granular activated carbon-sedimenting zone on a second surface;
- and an air-permeable sheet laminated on the second surface.
An air-purifying filter obtained by forming a gas adsorption sheet having a granular activated carbon-containing sheet and an air-permeable sheet into a shape of pleats or wave, said granular activated carbon-containing sheet comprising:
- a granular activated carbon having an average particle diameter of 100 to 600 μm, a supporting fiber with a fiber diameter of 15 μm or more for fixing the granular activated carbon in contact with it, and an adhesive fiber which contributes to shape retention and is a water-swelling fiber wherein said granular activated carbon-containing sheet is integrally formed by wet bonding and has small pores that allow air to substantially permeate the carbon-containing sheet in a thickness direction, said granular activated carbon-containing sheet has a surface zone containing supporting fibers and no granular activated carbon on one surface, and a granular activated carbon-sedimenting zone on a second surface, and wherein said air-permeable sheet is laminated on the second surface of the granular activated carbon-containing sheet.
An air-purifying filter obtained by forming a gas adsorption sheet having a granular activated carbon-containing sheet and an air-permeable sheet into a shape of pleats of wave, said granular activated carbon-containing sheet comprising:
- a granular activated carbon having an average particle diameter of 100 to 600 μm, a supporting fiber with a fiber diameter of 15 μm or more for fixing the granular activated carbon in contact with it, and an adhesive fiber which contributes to shape retention and is a water-swelling fiber, wherein said granular activated carbon-containing sheet is integrally formed by wet bonding and has small pores that allow air to substantially permeate the carbon-containing sheet in a thickness direction, said granular activated carbon-containing sheet has a surface zone containing supporting fibers and no granular activated carbon on one surface, and a granular activated carbon-sedimenting zone on a second surface, and wherein said air-permeable sheet is laminated on the second surface of the granular activated carbon-containing sheet and is provided with a cover sheet in the form of a non-woven fabric, woven fabric, or net.
Dependencies are inferred from the claim text.