# US 11,440,024 B2 · Conductive fabric filter, method for manufacturing the same and electric dust collector having the same

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- Number: US 11,440,024 B2
- Document ID: US11440024B2
- Status: Granted
- Kind: B2
- Application number: 16/802,636
- Filed: 2020-02-27
- Published: 2021-08-12
- Granted: 2022-09-13
- Earliest claimed: 2020-02-11
- Assignees: CS E&L Co., Ltd.
- Applicants: CS E&L Co., Ltd.
- Inventors: Won Jae Han
- Web page: https://patentgrep.com/patent/US11440024B2

## CPC

- B03C 3/60: Use of special materials other than liquids
- B01D 39/1623: {of synthetic origin}
- B03C 3/47: flat, e.g. plates, discs, gratings
- C23C 18/1644: {porous substrates}
- C23C 18/2086: {with use of organic or inorganic compounds other than metals, first}
- C23C 18/30: Activating {or accelerating or sensitising with palladium or other noble metal}
- C23C 18/40: using reducing agents
- C23C 18/48: Coating with alloys
- D06M 11/83: with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
- D06M 23/16: Processes for the non-uniform application of treating agents, e.g. one-sided treatment; Differential treatment
- B01D 46/0032: {using electrostatic forces to remove particles, e.g. electret filters}
- B01D 46/12: in multiple arrangements
- B01D 46/64: arranged concentrically or coaxially
- B01D 2239/0241: comprising electrically conductive fibres or particles
- B01D 2239/0478: on a layer of the filter
- B01D 2239/10: Filtering material manufacturing
- C23C 18/1641: {Organic substrates, e.g. resin, plastic}
- C23C 18/22: Roughening, e.g. by etching
- C23C 18/38: Coating with copper
- D10B 2401/16: antistatic; conductive
- B03C: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS (separating isotopes B01D59/00; combinations of magnetic or electrostatic separation with separation of solids by other means B03B, B07B)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

A conductive fabric filter includes a non-woven fabric coated with copper by electroless plating, and the non-woven fabric has pores and is conductive.

## Claims

### Claim 1

An electric dust collector comprising:
conductive fabric filters each comprising:
a non-woven fabric coated with copper by electroless plating, wherein the non-woven fabric has pores and is conductive; and
a housing part comprising:
an inlet through which air including a foreign material flows;
an outlet through which the air without the foreign material is discharged; and
a seating portion in which the conductive fabric filters are seated and spaced apart from each other at a predetermined interval between the inlet and the outlet, wherein
the conductive fabric filters are configured such that, when opposite polarity DC voltages, between 1 V and 12 V, are applied to the conductive fabric filters, the conductive fabric filters include:
a positive conductive fabric filter, to which a positive (+) electric charge is applied; and
a negative conductive fabric filter, to which a negative (−) electric charge is applied, and
fine dust particles in the air, that have a positive (+) electric charge while passing through the pores of the negative conductive fabric filter, are adsorbed to the negative conductive fabric filter, and fine dust particles in the air, that have a negative (−) electric charge while passing through the pores of the positive conductive fabric filter, are adsorbed to the positive conductive fabric filter.