WO2022065517A1 - エアフィルタ濾材、フィルタプリーツパック及びエアフィルタユニット - Google Patents

エアフィルタ濾材、フィルタプリーツパック及びエアフィルタユニット Download PDF

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Publication number
WO2022065517A1
WO2022065517A1 PCT/JP2021/035724 JP2021035724W WO2022065517A1 WO 2022065517 A1 WO2022065517 A1 WO 2022065517A1 JP 2021035724 W JP2021035724 W JP 2021035724W WO 2022065517 A1 WO2022065517 A1 WO 2022065517A1
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Prior art keywords
filter
air filter
filter medium
air
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/035724
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English (en)
French (fr)
Japanese (ja)
Inventor
優介 池村
将明 森
俊輔 正木
剛 佐藤
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Nitto Denko Corp
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Nitto Denko Corp
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Filing date
Publication date
Application filed by Nitto Denko Corp filed Critical Nitto Denko Corp
Priority to EP21872642.0A priority Critical patent/EP4218983A4/en
Priority to US18/027,699 priority patent/US20230372858A1/en
Priority to CN202180066227.4A priority patent/CN116261484A/zh
Priority to JP2022552119A priority patent/JPWO2022065517A1/ja
Priority to KR1020237013453A priority patent/KR20230079108A/ko
Publication of WO2022065517A1 publication Critical patent/WO2022065517A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1692—Other shaped material, e.g. perforated or porous sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003—Glass or glassy material
    • B01D39/2017—Glass or glassy material the material being filamentary or fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027—Metallic material
    • B01D39/2041—Metallic material the material being filamentary or fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
    • B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/14—Pleat-type membrane modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/12—Composite membranes; Ultra-thin membranes
    • B01D69/1216—Three or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/30—Polyalkenyl halides
    • B01D71/32—Polyalkenyl halides containing fluorine atoms
    • B01D71/36—Polytetrafluoroethylene
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
    • B01D2239/0216—Bicomponent or multicomponent fibres
    • B01D2239/0233—Island-in-sea
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0622—Melt-blown
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0631—Electro-spun
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0654—Support layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0681—The layers being joined by gluing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/08—Special characteristics of binders
    • B01D2239/086—Binders between particles or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1208—Porosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1233—Fibre diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1258—Permeability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1291—Other parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/10—Multiple layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20—Shape of filtering material
    • B01D2275/205—Rectangular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/30—Porosity of filtering material
    • B01D2275/305—Porosity decreasing in flow direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/40—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for cleaning of environmental air, e.g. by filters installed on vehicles or on streets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2325/00—Details relating to properties of membranes
    • B01D2325/20—Specific permeability or cut-off range

Definitions

  • the fluororesin porous membrane has innumerable fine pores and is excellent in the ability to collect particles such as dust, so that it is used in various air filter filter media.
  • the fluororesin porous membrane usually functions as a surface collection filter that collects the object to be collected on the surface layer portion. Therefore, when an air filter filter medium provided with a fluororesin porous membrane is used for collecting particles in the atmosphere such as an outside air treatment filter and a turbine intake filter, the pressure loss tends to increase due to clogging.
  • a pre-filter is arranged on the upstream side of the air flow passing through the fluororesin porous membrane.
  • FIG. 1 shows an example of the air filter filter medium of the present embodiment.
  • the air filter filter medium 1 in FIG. 1 is a filter medium provided with a fluororesin porous membrane 2.
  • the air filter filter medium 1 further includes a collection layer 3 and a breathable adhesive layer 4.
  • the collection layer 3, the breathable adhesive layer 4, and the fluororesin porous membrane 2 are arranged in this order from the upstream to the downstream of the air flow 11 that passes through the air filter filter medium 1.
  • the collection layer 3 and the breathable adhesive layer 4 are arranged on the upstream side of the air flow 11 with respect to the fluororesin porous membrane 2 in this order from the upstream side.
  • the air filter filter medium 1 of FIG. 1 includes one collection layer 3, a breathable adhesive layer 4, and a fluororesin porous film 2, respectively.
  • polyalphaolefin (PAO) particles which are polydisperse particles having a number peak in the range of particle size 0.1 to 0.2 ⁇ m, are 0.2 to 0. It is permeated through the air filter filter medium 1 at a concentration of .5 g / m 3 and a linear velocity of 5.3 cm / sec, and the change in the retention amount of the particles in the air filter filter medium 1 and the pressure loss of the air filter filter medium 1 is evaluated.
  • the average fiber diameter may be substantially uniform in the thickness direction of the collection layer 3. In the present specification, even if there is a difference of 20% or less, preferably 10% or less, it is considered that the average fiber diameter is substantially uniform. The above difference is caused by the formula: (D max ⁇ D min ) / D min , where the smallest average fiber diameter is D min and the largest average fiber diameter is D max among the plurality of average fiber diameters D to be compared. ).
  • the fluororesin porous membrane 2 is mainly composed of fluororesin. "Mainly composed of fluororesin” means that the content of fluororesin is the largest among all the components contained in the fluororesin porous membrane 2.
  • the content of the fluororesin in the fluororesin porous membrane 2 is, for example, 50% by weight or more, 60% by weight or more, 70% by weight or more, 80% by weight or more, 90% by weight or more, and further 95% by weight or more. You may.
  • the fluororesin porous membrane 2 may contain, for example, a filler in addition to the fluororesin.
  • fluororesins examples include PTFE, ethylene-tetrafluoroethylene-hexafluoropropylene copolymer (EFEP), tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer (THV), and tetrafluoroethylene-hexafluoropropylene.
  • FEP ethylene-tetrafluoroethylene-hexafluoropropylene copolymer
  • TSV tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer
  • ETFE ethylene-tetrafluoroethylene copolymer
  • stretching examples include stretching of an unfired film at a stretching ratio of 2 to 60 times with respect to MD (longitudinal direction) and a stretching temperature of 150 to 390 ° C., and stretching ratio of the film with respect to TD (width direction) of 10 to 60 times and stretching temperature. It is a biaxial stretching in combination with stretching at 40 to 150 ° C.
  • the method for producing the fluororesin porous membrane 2 is not limited as long as the collection performance according to the intended use of the air filter filter medium 1 can be obtained.
  • the air filter unit 31 shown in FIG. 6 includes a filter pleated pack 21 and a frame body 32 that supports the filter pleated pack 21.
  • the peripheral edge of the filter pleated pack 21 is supported by the frame body (support frame) 32.
  • the frame 32 is composed of, for example, a metal, a resin, or a composite material thereof.
  • the filter pleated pack 21 can be fixed to the frame body 32 at the same time as the molding of the frame body 32.
  • the configuration of the frame 32 may be the same as the configuration of the frame provided in the conventional air filter unit. Since the air filter filter medium 1 is provided, the air filter unit 31 is suitable for suppressing an increase in pressure loss even in an environment containing liquid particles such as oil mist.
  • Example 2 The air filter filter medium of Example 2 was obtained in the same manner as in Example 1 except that the basis weight of the breathable adhesive amount was 8 g / m 2 . The obtained air filter filter medium was subjected to evaluation of each characteristic with the collection layer B side as the upstream side.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
PCT/JP2021/035724 2020-09-28 2021-09-28 エアフィルタ濾材、フィルタプリーツパック及びエアフィルタユニット Ceased WO2022065517A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP21872642.0A EP4218983A4 (en) 2020-09-28 2021-09-28 AIR FILTER FILTER MEDIA, FILTER PLEATS PACK, AND AIR FILTER UNIT
US18/027,699 US20230372858A1 (en) 2020-09-28 2021-09-28 Air filter medium, filter pleat pack, and air filter unit
CN202180066227.4A CN116261484A (zh) 2020-09-28 2021-09-28 空气过滤器滤材、过滤器褶裥组件及空气过滤器单元
JP2022552119A JPWO2022065517A1 (https=) 2020-09-28 2021-09-28
KR1020237013453A KR20230079108A (ko) 2020-09-28 2021-09-28 에어 필터 여과재, 필터 플리츠 팩 및 에어 필터 유닛

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020162643 2020-09-28
JP2020-162643 2020-09-28

Publications (1)

Publication Number Publication Date
WO2022065517A1 true WO2022065517A1 (ja) 2022-03-31

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PCT/JP2021/035724 Ceased WO2022065517A1 (ja) 2020-09-28 2021-09-28 エアフィルタ濾材、フィルタプリーツパック及びエアフィルタユニット

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Country Link
US (1) US20230372858A1 (https=)
EP (1) EP4218983A4 (https=)
JP (1) JPWO2022065517A1 (https=)
KR (1) KR20230079108A (https=)
CN (1) CN116261484A (https=)
WO (1) WO2022065517A1 (https=)

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KR20230078711A (ko) * 2020-09-28 2023-06-02 닛토덴코 가부시키가이샤 에어 필터 여과재, 필터 플리츠 팩 및 에어 필터 유닛

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