Gas adsorption sheet and air-purifying filter
AssigneeToyobo Co., Ltd.
InventorsShinichi Minemura, Masayuki Imagawa
Life of this patent
Estimating the term…
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.
Claims20
A gas adsorption sheet having a granular activated carbon-containing sheet, said 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 obtained by forming a gas adsorption sheet having a granular activated carbon-containing 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 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 obtained by forming a gas adsorption sheet having a granular activated carbon-containing sheet into a shape of pleats or wave, said granular activated carbon-containing sheet having small pores capable of substantially permeating an air in a thickness direction and 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 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 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 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 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,
- and said air-permeable sheet being further provided with a cover sheet in the form of a non-woven fabric, woven fabric or net.
A method for producing a gas adsorption sheet, which comprises a step of forming a granular activated carbon-containing sheet, said step of forming a granular activated carbon-containing sheet comprising the steps of:
- preparing an aqueous slurry containing a granular activated carbon having an average particle diameter of 60 to 600 μm, a supporting fiber and a water-swelling adhesive fiber,
- spreading the aqueous slurry in a sheet-like form, and
- mechanically dewatering and drying the aqueous slurry spread.
Dependencies are inferred from the claim text.