Air-cleaning filter having dust collecting and deodorizing functions and preparation method therefor
AssigneeCoway Co., Ltd.
InventorsHyun Jun YUN, Byong Hyoek LEE, Jong Cheol KIM
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Abstract
An air-cleaning filter includes a non-woven fabric for dust collection and a non-woven fabric for deodorization having activated carbon particles combined therewith. By adjusting the particle diameter and content of the activated carbon particles and laminating with a non-woven fabric coated with an absorber for other gases, a dust collecting function and a deodorizing function can be imparted at the same time while also creating a structure with a low differential pressure.
Claims20
An air purifying filter, which comprises a pleated filter medium, wherein the filter medium comprises:
- a dust collecting filter layer comprising a first nonwoven fabric;
- a deodorizing filter layer comprising a second nonwoven fabric and activated carbon particles having a particle size smaller than 150 mesh bound to the second nonwoven fabric in an amount of 10 g/m2 to 60 g/m2;
- and
- a functional filter layer comprising a third nonwoven fabric and at least one gas adsorbent,
- wherein the dust collecting filter layer, the deodorizing filter layer, and the functional filter layer are physically or chemically laminated.
An air purifying filter, which comprises a nonwoven fabric and activated carbon particles bound to the nonwoven fabric by a binder,
- wherein the nonwoven fabric is a spun-bonded or thermal-bonded nonwoven fabric having a basis weight of 30 g/m2 to 80 g/m2,
- the activated carbon particles have a particle diameter smaller than 150 mesh and are employed in an amount of 10 g/m2 to 60 g/m2, and
- the binder is employed in an amount of 20 to 50 parts by weight relative to 100 parts by weight of the activated carbon particles.
A process for manufacturing an air purifying filter, which comprises:
- preparing a dust collecting filter layer comprising a first nonwoven fabric;
- binding activated carbon particles having a particle size smaller than 150 mesh in an amount of 10 g/m2 to 60 g/m2 to a second nonwoven fabric to prepare a deodorizing filter layer;
- preparing a functional filter layer comprising a third nonwoven fabric and at least one gas adsorbent;
- physically or chemically laminating the dust collecting filter layer, the deodorizing filter layer, and the functional filter layer to prepare a filter medium;
- and
- pleating the filter medium.
Dependencies are inferred from the claim text.