KR20130075514A - Asymmetric porous sheet, manufacturing method thereof and air purificaion filter using the same - Google Patents
Asymmetric porous sheet, manufacturing method thereof and air purificaion filter using the same Download PDFInfo
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- KR20130075514A KR20130075514A KR1020110143904A KR20110143904A KR20130075514A KR 20130075514 A KR20130075514 A KR 20130075514A KR 1020110143904 A KR1020110143904 A KR 1020110143904A KR 20110143904 A KR20110143904 A KR 20110143904A KR 20130075514 A KR20130075514 A KR 20130075514A
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- Prior art keywords
- nonwoven fabric
- asymmetric
- porous sheet
- asymmetric porous
- air
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- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 77
- 239000011248 coating agent Substances 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 29
- -1 poly ethylene Polymers 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 20
- 239000004743 Polypropylene Substances 0.000 claims abstract description 15
- 229920001155 polypropylene Polymers 0.000 claims abstract description 15
- 229920000728 polyester Polymers 0.000 claims abstract description 11
- 239000004698 Polyethylene Substances 0.000 claims abstract description 6
- 229920000573 polyethylene Polymers 0.000 claims abstract description 6
- 238000004378 air conditioning Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- 229920007925 Ethylene chlorotrifluoroethylene (ECTFE) Polymers 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 238000005098 hot rolling Methods 0.000 claims description 7
- 229920001780 ECTFE Polymers 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005470 impregnation Methods 0.000 claims description 4
- CHJAYYWUZLWNSQ-UHFFFAOYSA-N 1-chloro-1,2,2-trifluoroethene;ethene Chemical group C=C.FC(F)=C(F)Cl CHJAYYWUZLWNSQ-UHFFFAOYSA-N 0.000 claims description 3
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 3
- 238000005191 phase separation Methods 0.000 claims description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052731 fluorine Inorganic materials 0.000 abstract description 12
- 239000011737 fluorine Substances 0.000 abstract description 12
- 230000000704 physical effect Effects 0.000 abstract description 5
- 239000004744 fabric Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 15
- 230000035699 permeability Effects 0.000 description 11
- 230000002209 hydrophobic effect Effects 0.000 description 10
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 description 9
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- 238000010924 continuous production Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000004750 melt-blown nonwoven Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/487—Aziridinylphosphines; Aziridinylphosphine-oxides or sulfides; Carbonylaziridinyl or carbonylbisaziridinyl compounds; Sulfonylaziridinyl or sulfonylbisaziridinyl compounds
- D06M13/493—Aziridinylphosphines; Aziridinylphosphine-oxides or sulfides; Carbonylaziridinyl or carbonylbisaziridinyl compounds; Sulfonylaziridinyl or sulfonylbisaziridinyl compounds perfluorinated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M17/00—Producing multi-layer textile fabrics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/02—Cellular or porous
- B32B2305/026—Porous
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/02—Moisture-responsive characteristics
- D10B2401/021—Moisture-responsive characteristics hydrophobic
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/10—Physical properties porous
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/04—Filters
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Filtering Materials (AREA)
Abstract
Description
본 발명은 비대칭 다공성 시트, 그 제조방법 및 그를 이용한 공조용 에어필터에 관한 것으로서, 더욱 상세하게는 밀도가 다른 2종이상의 부직포로 이루어진 합지부직포상에, 불소수지 함유 코팅액이 코팅 또는 함침된 비대칭 다공성 시트, 필터수명, 통풍성 및 포집효율이 우수하며 연속생산이 가능한 그의 제조방법 및 상기 비대칭 다공성 시트로 이루어져 공기중의 미세먼지, 입자 등의 제거가 가능한 공조용 에어필터에 관한 것이다. The present invention relates to an asymmetric porous sheet, a method of manufacturing the same and an air filter for air conditioning using the same, and more particularly, to an asymmetric porous coating or impregnated with a fluorocarbon resin-containing coating liquid on a laminated nonwoven fabric having two or more kinds of nonwoven fabrics having different densities. The present invention relates to a manufacturing method of the sheet, filter life, air permeability and collection efficiency, which is capable of continuous production, and to an air filter for an air conditioner, which is made of the asymmetric porous sheet to remove fine dust and particles in the air.
일반적으로 산업용 및 가정용으로 사용되는 공조용 에어필터는 종래에는 유리섬유와 바인더를 혼합한 슬러리를 초지법으로 형성하거나 멜트블로운 부직포를 정전가공하는 것에 의해 제조된다. In general, air conditioning air filters used for industrial and domestic use are conventionally manufactured by forming a slurry in which glass fibers and a binder are mixed by papermaking or electrostatically processing a meltblown nonwoven fabric.
그러나 유리섬유를 함유한 공조용 에어필터는 공기중의 VOC와 같은 휘발성 용매 등에 대해 내부식성이 약하고 수분에 취약하여 가동시간 경에 따라 압력손실이 증가하고 이에 사용주기가 짧으며, 절곡 가공시 다량의 분진이 발생되어 환경오염을 유발하는 단점이 지적되고 있다. However, air-conditioning air filter containing glass fiber has low corrosion resistance against volatile solvents such as VOC in the air and is vulnerable to moisture, so the pressure loss increases over time and its use cycle is short. It is pointed out that dust is generated and causes environmental pollution.
한편 멜트블로운 기반의 정전필터 역시 대기 중 수분에 취약하여 장기간 사용시 압력손실의 증가로 필터수명 감소의 문제가 수반된다. On the other hand, melt blown based electrostatic filters are also vulnerable to moisture in the air, which leads to a decrease in filter life due to an increase in pressure loss during long-term use.
최근 이러한 문제를 해결하기 위하여, 부직포 형태의 통풍성을 갖춘 지지체 상에, 폴리테트라플루오르에틸렌(PTFE) 재질의 다공성 필름을 접착한 필터 형태가 제안되고 있다. Recently, in order to solve this problem, a filter form in which a porous film made of polytetrafluoroethylene (PTFE) is adhered to a nonwoven fabric having a ventilated support has been proposed.
그 일례로 일본특허공개공보 제2008-279359호에서는 통과기체 선속도가 5.3 cm/sec일 때, 압력손실이 150Pa 이하인 다공성 PTFE 연신필름과 압력손실이 100 Pa 이하인 폴리프로필렌, 폴리에틸렌, 폴리에스테르 재질의 통풍성 지지체를 열이나 접착제를 이용하여 접착한 필터여과제의 제조방법을 개시하고 있다. For example, Japanese Patent Application Laid-Open No. 2008-279359 discloses a porous PTFE stretched film having a pressure loss of 150 Pa or less and a polypropylene, polyethylene, or polyester material having a pressure loss of 100 Pa or less when the passing gas linear velocity is 5.3 cm / sec. Disclosed is a method for producing a filter filter, wherein a ventilated support is bonded using heat or an adhesive.
그러나 상기 기술은 PTFE와 지지체간의 접착력이 약해 절곡 시, 불완전한 필터가 형성되고 열에 의해 지지체의 변형과 이로 인한 여과성능이 감소될 수 있다.However, the technique is weak in the adhesion between the PTFE and the support, when bending, an incomplete filter is formed, the deformation of the support and the resulting filtration performance can be reduced by heat.
일본특허공개공보 제2009-101254호에서는 세섬도 섬유와 태섬도 섬유를 교락시킨 후 세섬도 섬유층위에 PTFE 연신막을 접착한 형태가 제시되고 있으며, 일본특허공개공보 제2005-288368호는 PTFE 다공성 막 상에, 열가소성 플라스틱 소재로 구성된 망상체를 접착하여 탈진성능을 개선시킨 다공성 시트가 개시되어 있다. Japanese Patent Laid-Open Publication No. 2009-101254 discloses a form in which a PTFE stretched membrane is adhered onto a fine-grained fiber layer after intersecting the fine-grained fibers and the fine-grained fibers, and Japanese Patent Laid-Open Publication No. 2005-288368 describes a PTFE porous membrane. The porous sheet which improved the dust-closing performance by adhering the network body which consists of thermoplastics materials to is disclosed.
상기 발명에 개시된 PTFE 연신막은 PTFE 분말을 적절한 윤활유와 혼합하여 슬러리를 제조하고 이를 압출, 연신 및 소결하는 공정을 통해 제조함으로써, 연속 생산이 불가능하다. 더욱이, PTFE와 지지체간의 낮은 접착력을 해결하기 위해 다양한 수단이 동원되고 있어 경제적, 생산적 측면에서 불리하다.The PTFE stretched film disclosed in the present invention is prepared through a process of mixing a PTFE powder with a suitable lubricating oil to prepare a slurry and extruding, stretching and sintering it, thereby making continuous production impossible. Moreover, various means have been mobilized to solve the low adhesion between PTFE and the support, which is disadvantageous in terms of economic and productive aspects.
이에 본 발명자들은 저렴하면서도 연속생산이 가능하고 압력손실이 낮으며 통풍성 및 포집효율이 우수한 공조용 에어필터를 개발하기 위해 노력한 결과, 밀도가 다른 부직포 2종 이상으로 구성된 합지부직포 상에 소수성이 우수하고 용해성이 우수한 불소수지를 코팅 또는 함침시킨 비대칭 다공성 시트가 통풍성, 포집효율, 탈진효율, 압력손실 등의 우수한 물성을 가짐을 확인함으로써, 본 발명을 완성하였다. Accordingly, the present inventors have made efforts to develop an air conditioner for air conditioning that is inexpensive, capable of continuous production, low pressure loss, and excellent ventilation and collection efficiency. As a result, the present invention has excellent hydrophobicity on a laminated nonwoven fabric composed of two or more kinds of nonwoven fabrics having different densities. The present invention was completed by confirming that the asymmetric porous sheet coated or impregnated with fluorine resin having excellent solubility has excellent physical properties such as air permeability, collection efficiency, dust removal efficiency, and pressure loss.
본 발명의 목적은 비대칭 밀도 구배를 가지도록 다층구조로 배치된 합지부직포 상에 불소수지 함유 코팅액이 코팅 또는 함침된 비대칭 다공성 시트를 제공하는 것이다. An object of the present invention is to provide an asymmetric porous sheet coated or impregnated with a fluororesin-containing coating liquid on a laminated nonwoven fabric having a multi-layered structure having an asymmetric density gradient.
본 발명의 다른 목적은 상기 비대칭 다공성 시트의 제조방법을 제공하는 것이다. Another object of the present invention is to provide a method for producing the asymmetric porous sheet.
본 발명의 또 다른 목적은 압력손실이 적고, 기계적 강도 및 포집효율이 우수하고 연속생산이 가능하고, 필터수명이 연장된 상기 비대칭 다공성 시트로 이루어진 공조용 에어필터를 제공하는 것이다. Another object of the present invention is to provide an air filter for air conditioning comprising the asymmetric porous sheet having low pressure loss, excellent mechanical strength and collection efficiency, continuous production, and extended filter life.
상기의 목적을 달성하기 위하여 본 발명은 비대칭 밀도 구배를 가지도록 다층구조로 배치된 합지부직포 상에, 불소수지 함유 코팅액이 코팅 또는 함침된 비대칭 다공성 시트를 제공한다.In order to achieve the above object, the present invention provides an asymmetric porous sheet coated or impregnated with a fluororesin-containing coating liquid on a laminated nonwoven fabric arranged in a multi-layer structure to have an asymmetric density gradient.
본 발명의 비대칭 다공성 시트에서, 합지부직포는 밀도가 다른 부직포 2종이상으로 이루어지며, 0.2 내지 0.6 g/㎤ 밀도 및 100 내지 500㎛ 두께를 충족한다. In the asymmetric porous sheet of the present invention, the laminated nonwoven fabric consists of two or more kinds of nonwoven fabrics having different densities, and satisfies a density of 0.2 to 0.6 g / cm 3 and a thickness of 100 to 500 µm.
상기 부직포 소재는 폴리에틸렌, 폴리프로필렌 및 폴리에스테르로 이루어진 군에서 선택되는 단독 또는 혼성부직포를 사용할 수 있다. 또한, 합지시, 층간 동일 소재 또는 다른 소재의 부직포가 배치되어 합지될 수 있다.The nonwoven material may be used alone or hybrid nonwoven fabric selected from the group consisting of polyethylene, polypropylene and polyester. In addition, when laminating, a nonwoven fabric of the same material or different materials between layers may be disposed and laminated.
본 발명의 비대칭 다공성 시트에서, 불소수지 함유 코팅액은 에틸렌클로로트리플루오로에틸렌(ECTFE) 2 내지 20중량% 및 휘발성 용매 80 내지 98중량%로 이루어진 용액이며, 더욱 바람직한 휘발성 용매로는 테트라하이드로퓨란을 사용하는 것이다.In the asymmetric porous sheet of the present invention, the fluororesin-containing coating solution is a solution consisting of 2 to 20% by weight of ethylene chlorotrifluoroethylene (ECTFE) and 80 to 98% by weight of a volatile solvent, and more preferably tetrahydrofuran is used. To use.
본 발명은 밀도가 다른 부직포 2종이상을 배치하고 열압연 처리하여, 밀도 0.2 내지 0.6g/㎤ 및 두께 100 내지 500㎛를 충족하는 폴리에스테르계 소재의 합지부직포를 형성하는 제1공정, The present invention is a first step of forming a laminated nonwoven fabric of a polyester-based material having a density of 0.2 to 0.6 g / cm 3 and a thickness of 100 to 500 ㎛ by arranging two or more kinds of nonwoven fabrics having different densities and hot rolling;
상기 합지부직포 상에 에틸렌클로로트리플루오로에틸렌 2 내지 20중량% 및 휘발성 용매 80 내지 98중량%로 이루어진 불소수지 함유 코팅액을 코팅 또는 침지하는 제2공정 및A second step of coating or immersing a fluororesin-containing coating liquid comprising 2 to 20% by weight of ethylene chlorotrifluoroethylene and 80 to 98% by weight of a volatile solvent on the laminated nonwoven fabric;
상온 또는 상온 내지 60℃온도의 열풍 또는 적외선에 의해 건조하는 제3공정으로 수행되는 비대칭 다공성 시트의 제조방법을 제공한다.It provides a method for producing an asymmetric porous sheet which is carried out in a third step of drying by hot air or infrared light at room temperature or room temperature to 60 ℃ temperature.
본 발명의 비대칭 다공성 시트의 제조방법에 있어서, 열압연 처리는 80 내지 200℃의 압연온도 및 3 내지 15 kgf/㎠ 압력조건하에서 수행되는 것이 바람직하다.In the method for producing an asymmetric porous sheet of the present invention, the hot rolling treatment is preferably performed under a rolling temperature of 80 to 200 ° C. and a pressure of 3 to 15 kgf / cm 2.
또한, 제2공정 이후, 물에 함침하여 용매-비용매 상분리에 의한 추가 기공형성공정을 더 수행할 수 있다. In addition, after the second step, an additional pore forming process by solvent-nonsolvent phase separation may be further performed by impregnation with water.
나아가 본 발명은 비대칭 밀도구배를 갖도록 다층구조로 배치된 합지부직포상에 불소수지가 코팅 또는 함침된 비대칭 다공성 시트로 이루어진 공조용 에어필터를 제공한다. Furthermore, the present invention provides an air conditioner for air conditioning comprising an asymmetric porous sheet coated or impregnated with a fluorocarbon resin on a laminated nonwoven fabric arranged in a multilayer structure to have an asymmetric density gradient.
본 발명은 비대칭 밀도 구배를 갖도록 다층구조로 배치된 합지부직포상에 소수성이 우수하고 용해성이 높은 불소수지가 코팅 또는 함침된 비대칭 다공성 시트를 제공함으로써, 공조용 에어필터로서 적합한 물성을 충족한다. The present invention satisfies physical properties suitable as an air filter for air conditioning by providing an asymmetric porous sheet coated or impregnated with a highly hydrophobic and highly soluble fluororesin on a laminated nonwoven fabric arranged in a multilayer structure to have an asymmetric density gradient.
즉, 본 발명의 비대칭 다공성 시트는 비대칭 기공분포 및 비대칭 밀도 구배로 형성됨으로써, 우수한 필터수명, 통풍성, 포집효율 및 탈진효율을 가지며, 시트 표면이 소수성으로 구성되어 반복사용이 가능하다. That is, the asymmetric porous sheet of the present invention is formed by an asymmetric pore distribution and an asymmetric density gradient, and has excellent filter life, air permeability, collection efficiency, and dust removal efficiency, and the sheet surface is hydrophobic, and thus can be repeatedly used.
또한, 본 발명의 비대칭 다공성 시트의 제조방법은 밀도가 다른 2종이상의 부직포를 열압연을 통해 합지한 후 불소수지 함유 코팅액으로 코팅, 건조하는 간단한 공정으로 비대칭 기공분포 및 비대칭 밀도구배를 갖도록 다층구조로 배치된 다공성 시트를 연속적으로 생산할 수 있는 장점을 제공한다. In addition, the manufacturing method of the asymmetric porous sheet of the present invention is a multi-layer structure to have an asymmetric pore distribution and an asymmetric density gradient by a simple process of laminating two or more kinds of non-woven fabrics having different densities through hot rolling, and then coating and drying the coating with a fluorine resin-containing coating solution. It offers the advantage of being able to continuously produce porous sheets arranged with.
이러한 물성을 충족하는 본 발명의 비대칭 다공성 시트는 공기중의 미세먼지, 입자 등을 제거하기 위한 공조용 에어필터 적용에 유용하다.The asymmetric porous sheet of the present invention that meets these properties is useful for air conditioning air filter applications for removing fine dust, particles, and the like in the air.
이에, 본 발명의 공조용 에어필터는 높은 내화학성을 가진 불소수지로 코팅되어 있어 반도체 배기가스 사용에 적합하고 일반산업 공조에도 적용 가능할 뿐만 아니라 불소수지의 높은 소수성으로 인한 우수한 탈진효율로 인해 가정용 공기청정기 또는 진공청소기에 적합하다. Therefore, the air filter for air conditioning of the present invention is coated with fluorine resin having high chemical resistance, which is suitable for the use of semiconductor exhaust gas, and is applicable to general industrial air conditioning as well as excellent dust removal efficiency due to the high hydrophobicity of the fluorine resin. Suitable for purifiers or vacuum cleaners.
본 발명을 상세히 설명하고자 한다. The present invention will be described in detail.
본 발명은 비대칭 밀도 구배를 가지도록 다층구조로 배치된 합지부직포 상에, 불소수지 함유 코팅액이 코팅 또는 함침된 비대칭 다공성 시트를 제공한다.The present invention provides an asymmetric porous sheet coated or impregnated with a fluororesin-containing coating liquid on a laminated nonwoven fabric arranged in a multilayer structure to have an asymmetric density gradient.
본 발명의 비대칭 다공성 시트에서 합지부직포는 밀도가 다른 부직포 2종이상으로 이루어지며, 0.2 내지 0.6 g/㎤ 밀도 및 100 내지 500㎛ 두께를 충족한다. 이러한 비대칭 밀도 구배로 이루어짐에 따라, 형성된 비대칭 기공분포로 인하여, 통풍성이 우수하고, 다층구조로 인한 기계적 강도향상에 따라 필터수명이 연장된다. In the asymmetric porous sheet of the present invention, the laminated nonwoven fabric is composed of two or more kinds of nonwoven fabrics having different densities, and satisfies a density of 0.2 to 0.6 g / cm 3 and a thickness of 100 to 500 µm. As a result of such an asymmetric density gradient, due to the formed asymmetric pore distribution, the air permeability is excellent, and the filter life is extended according to the improvement in mechanical strength due to the multilayer structure.
이때, 사용되는 부직포의 밀도가 0.2g/㎤ 미만이거나 두께가 100㎛ 미만이면, 지나치게 얇아 기계적 강도에 문제가 있고 밀도가 0.6g/㎤를 초과하거나 두께가 500㎛을 초과하면, 통풍성이 저하된다. At this time, if the density of the nonwoven fabric to be used is less than 0.2 g / cm 3 or less than 100 μm, if the thickness is too thin, there is a problem in mechanical strength, and if the density exceeds 0.6 g / cm 3 or the thickness exceeds 500 μm, air permeability decreases. .
또한, 부직포는 폴리에틸렌, 폴리프로필렌 및 폴리에스테르로 이루어진 군에서 선택되는 단독 또는 혼성부직포가 사용될 수 있으며, 합지시 층간 부직포가 동일 소재 또는 다른 소재의 부직포로 배치되어 합지될 수 있다. In addition, the nonwoven fabric may be used alone or a hybrid nonwoven fabric selected from the group consisting of polyethylene, polypropylene and polyester, and when laminated, the interlayer nonwoven fabric may be disposed and laminated with a nonwoven fabric of the same material or different materials.
본 발명의 비대칭 다공성 시트에서 불소수지 함유 코팅액의 조성은 대표적인 소수성 및 용해성 수지로서, 에틸렌클로로트리플루오로에틸렌(ECTFE) 고분자를 사용한다. The composition of the fluororesin-containing coating liquid in the asymmetric porous sheet of the present invention is an ethylene chlorotrifluoroethylene (ECTFE) polymer as a representative hydrophobic and soluble resin.
더욱 바람직하게는 에틸렌클로로트리플루오로에틸렌(ECTFE) 2 내지 20 중량% 및 휘발성 용매 80 내지 98중량%로 이루어진 용액이며, 더욱 바람직한 휘발성 용매로는 테트라하이드로퓨란을 사용하는 것이다.More preferably, it is a solution consisting of 2 to 20% by weight of ethylene chlorotrifluoroethylene (ECTFE) and 80 to 98% by weight of a volatile solvent, and tetrahydrofuran is used as a more preferable volatile solvent.
상기에서, 에틸렌클로로트리플루오로에틸렌(ECTFE) 수지함량이 2 중량% 미만이면, 탈진효과 및 반복사용이 미비하거나 어렵고, 20 중량%를 초과하면, 막의 두께가 증가하거나 합지부직포의 기공을 감소시켜 통풍성이 저하된다. In the above, when the ethylene chlorotrifluoroethylene (ECTFE) resin content is less than 2% by weight, the dust removal effect and repeated use is insufficient or difficult, and when it exceeds 20% by weight, the film thickness increases or the pores of the laminated nonwoven fabric are reduced. Ventilation is reduced.
이에, 본 발명의 비대칭 다공성 시트는 시트 표면이 소수성으로 구성되어 반복사용이 가능하다.Thus, the asymmetric porous sheet of the present invention can be used repeatedly because the sheet surface is composed of hydrophobic.
본 발명은 비대칭 다공성 시트의 제조방법을 제공한다. The present invention provides a method for producing an asymmetric porous sheet.
더욱 바람직하게는 밀도가 다른 부직포 2종이상을 배치하고 열압연 처리하여, 밀도 0.2 내지 0.6g/㎤ 및 두께 100 내지 500㎛를 충족하는 폴리에스테르계 소재의 합지부직포를 형성하는 제1공정, More preferably, a first step of forming a laminated nonwoven fabric of a polyester-based material having a density of 0.2 to 0.6 g / cm 3 and a thickness of 100 to 500 µm by disposing two or more kinds of nonwoven fabrics having different densities and hot rolling;
상기 합지부직포 상에 에틸렌클로로트리플루오로에틸렌 2 내지 20중량% 및 휘발성 용매 80 내지 98중량%로 이루어진 불소수지 함유 코팅액을 코팅 또는 침지하는 제2공정 및A second step of coating or immersing a fluororesin-containing coating liquid comprising 2 to 20% by weight of ethylene chlorotrifluoroethylene and 80 to 98% by weight of a volatile solvent on the laminated nonwoven fabric;
상온 또는 상온 내지 60℃온도의 열풍 또는 적외선에 의해 건조하는 제3공정으로 수행된다. It is carried out in a third step of drying by hot air or infrared light at room temperature or room temperature to 60 ℃ temperature.
이하, 각 공정별로 상세히 설명한다. Hereinafter, each process will be described in detail.
본 발명의 비대칭 다공성 시트의 제조방법에서 제1공정은 합지부직포를 형성하는 것으로서, 부직포 선정은 0.2 내지 0.6 g/㎤ 밀도 및 100 내지 500㎛ 두께를 충족하는 부직포 중에서 밀도가 다른 부직포 2종이상으로 이루어지며, 이때 부직포는 폴리에틸렌, 폴리프로필렌 및 폴리에스테르로 이루어진 군에서 선택되는 단독 또는 혼성부직포가 사용되며, 합지시 층간 부직포가 동일 소재 또는 다른 소재의 부직포로 배치되어 합지될 수 있다. In the method of manufacturing the asymmetric porous sheet of the present invention, the first step is to form a laminated nonwoven fabric, and the selection of the nonwoven fabric includes two or more kinds of nonwoven fabrics having different densities among nonwoven fabrics satisfying a density of 0.2 to 0.6 g / cm 3 and a thickness of 100 to 500 µm. In this case, the non-woven fabric is used alone or a hybrid non-woven fabric selected from the group consisting of polyethylene, polypropylene and polyester, interlayer non-woven fabric may be laminated to the non-woven fabric of the same material or different materials when laminated.
이때, 열압연 처리는 80 내지 200℃의 압연온도에서 압연시 3 내지 15 kgf/㎠ 압력 조건하에서 수행되는 것이다. At this time, the hot rolling treatment is carried out under a pressure condition of 3 to 15 kgf / cm 2 when rolling at a rolling temperature of 80 to 200 ℃.
상기 압연온도가 80℃ 미만이면, 층 사이의 분리가 일어나 포집효율에 문제가 발생하고, 200℃를 초과하면, 기공이 감소하여 통풍성이 저하된다. 압연시 압력조건이 상기 범위에서 벗어나면, 온도에서와 동일한 문제가 발생한다. If the rolling temperature is less than 80 ° C., separation between the layers occurs and a problem arises in the collection efficiency. If the rolling temperature is higher than 200 ° C., the pores decrease to decrease the air permeability. If the pressure condition during rolling is out of the above range, the same problem as in temperature occurs.
본 발명의 제1공정에서, 비대칭 기공분포와 비대칭 밀도 구배로 합지부직포를 형성함에 따라, 통풍성이 우수하고, 다층구조로 인한 기계적 강도향상에 따라 필터수명이 연장된다.In the first step of the present invention, by forming a laminated nonwoven fabric with an asymmetric pore distribution and an asymmetric density gradient, the air permeability is excellent, and the filter life is extended according to the improvement in mechanical strength due to the multilayer structure.
본 발명의 제조방법에서 제2공정은 제1공정의 합지부직포상에, 소수성이 우수하고 용해성이 높은 불소수지가 표면에 코팅 또는 기공내 함침되도록 수행하는 공정이다. In the manufacturing method of the present invention, the second step is a step of performing a coating or impregnation in the pores on the surface of the laminated nonwoven fabric of the first step, having excellent hydrophobicity and high solubility.
이때, 합지부직포상에 불소수지 함유 코팅액 적용 후, 밀도 증가에도 불구하고, 압력손실이 최소화되며, 포집효율이 상승된다. 또한, 시트 표면이 소수성으로 구성되어 반복사용이 가능하다.At this time, after applying the fluorine resin-containing coating liquid on the laminated nonwoven fabric, despite the increase in density, the pressure loss is minimized, the collection efficiency is increased. In addition, the surface of the sheet is hydrophobic and can be used repeatedly.
제2공정에 사용되는 불소수지는 대표적인 소수성 및 용해성 수지로서 ECTFE 고분자를 사용하며, 바람직한 사용함량은 2 내지 20중량%가 함유된다. 이때, ECTFE 고분자 함량이 2중량% 미만이면, 탈진효과 및 반복사용이 미비하거나 어렵고 20 중량%를 초과하면 막의 두께가 증가하거나 합지부직포의 기공을 감소시켜 통풍성이 저하된다. The fluororesin used in the second step uses an ECTFE polymer as a representative hydrophobic and soluble resin, and a preferred content is 2 to 20 wt%. At this time, if the ECTFE polymer content is less than 2% by weight, the dust removal effect and repeated use is insufficient or difficult, and if it exceeds 20% by weight, the thickness of the membrane increases or the pores of the laminated nonwoven fabric decreases the air permeability.
또한, 불소수지 함유 코팅액은 상기 ECTFE 고분자가 휘발성 용매, 더욱 바람직하게는 테트라하이드로퓨란 80 내지 98중량%에 함유되도록 제조된다.In addition, the fluorine resin-containing coating solution is prepared such that the ECTFE polymer is contained in 80 to 98% by weight of a volatile solvent, more preferably tetrahydrofuran.
본 발명의 제조방법에서 제3공정은 상기 제2공정의 코팅 이후, 건조하는 공정으로서, 상온에서 건조하거나 생산성을 위해 상온 내지 80℃ 범위 내에서 열풍 또는 적외선 수단을 이용하여 건조할 수 있다.In the manufacturing method of the present invention, the third step is a step of drying after the coating of the second step, may be dried at room temperature or by using hot air or infrared means within a range from room temperature to 80 ℃ for productivity.
이 경우 건조온도가 80℃를 초과하게 되면, 코팅층이 불균일하게 되므로, 제시된 범위 이내에서 수행되도록 한다. In this case, if the drying temperature exceeds 80 ℃, the coating layer becomes non-uniform, so as to be carried out within the suggested range.
본 발명의 제조방법은 상기 제2공정의 코팅공정 이후, 물에 함침하여 용매-비용매 상분리에 의한 추가 기공형성공정을 수행할 수 있다. In the manufacturing method of the present invention, after the coating step of the second step, it may be impregnated with water to perform an additional pore forming step by solvent-non-solvent phase separation.
이때, 물에 함침시간은 2 내지 6시간이 바람직하며, 침지시간이 2시간 미만이면, 건조 후 잔존용매에 의해 기공이 폐색되는 문제가 있고 침지시간이 6시간을 초과하면 생산성에 문제가 있다. At this time, the impregnation time in water is preferably 2 to 6 hours, if the immersion time is less than 2 hours, there is a problem that pores are blocked by the residual solvent after drying, and if the immersion time exceeds 6 hours there is a problem in productivity.
본 발명의 다공성 시트의 제조방법은 합지부직포상에 불소수지함유 코팅이후 건조하는 공정으로 이루어짐에 따라, 통상의 압출, 연신 및 소결하는 공정없이 수행되므로, 압력손실이 적고, 기계적 강도가 우수한 시트를 제공하면서도 연속 생산이 가능한 제조방법이다.According to the method of manufacturing the porous sheet of the present invention, since the fluorine resin-containing coating is carried out on a laminated nonwoven fabric and then dried, the method is performed without the usual extrusion, stretching and sintering process. It is a manufacturing method that can provide continuous production while providing.
나아가 본 발명은 공기중의 미세먼지, 입자를 제거하기 위한 용도로서, 상기 비대칭 다공성 시트로 이루어진 공조용 에어필터를 제공한다.Furthermore, the present invention provides an air filter for air conditioning comprising the asymmetric porous sheet as a use for removing fine dust and particles in the air.
본 발명의 비대칭 다공성 시트는 비대칭 기공분포 및 비대칭 밀도 구배를 갖도록 다층구조로 배치된 합지부직포로 인하여, 우수한 필터수명, 통풍성, 포집효율 및 탈진효율이 구현되며, 소수성 불소수지함유 코팅액 처리로 인하여, 시트 표면이 소수성으로 구성되어 반복사용이 가능하다. 특히, 불소수지의 높은 내화학성으로 인하여, 반도체 배기가스 사용에 적합하고, 일반산업 공조에도 적용 가능하며, 가정용 공기청정기 또는 진공청소기에 유용하다.
Asymmetric porous sheet of the present invention due to the laminated nonwoven fabric arranged in a multi-layer structure having an asymmetric pore distribution and asymmetric density gradient, excellent filter life, air permeability, collection efficiency and dust removal efficiency, due to the hydrophobic fluorine resin-containing coating solution treatment, The sheet surface is hydrophobic and can be used repeatedly. In particular, due to the high chemical resistance of the fluorine resin, it is suitable for the use of semiconductor exhaust gas, can be applied to general industrial air conditioning, and is useful for household air cleaners or vacuum cleaners.
이하, 실시예를 통하여 본 발명을 보다 상세히 설명하고자 한다.Hereinafter, the present invention will be described in more detail with reference to Examples.
본 실시예는 본 발명을 보다 구체적으로 설명하기 위한 것이며, 본 발명의 범위가 이들 실시예로 한정되는 것은 아니다.This embodiment is intended to illustrate the present invention in more detail, and the scope of the present invention is not limited to these examples.
<실시예 1>≪ Example 1 >
두께 95㎛ 및 밀도 0.36g/㎤의 폴리에스테르/폴리프로필렌 부직포와 두께 140㎛ 및 밀도 0.399g/㎤의 폴리프로필렌 부직포를 130℃에서 5kg/㎠의 압력으로 10분 동안 열 압연하여 비대칭 합지부직포를 제작하였다. 이후, 상기 비대칭 혼합부직포를 에틸렌클로로트리플루오로에틸렌(ECTFE) 수지(Mw; 450,000) 5중량%를 테트라하이드로퓨란에 용해시켜 준비한 용액에 충분히 적셔지도록 침지한 후, 상온에서 건조하여 다공성 여과시트로 이루어진 공조용 에어필터를 제조하였다. Asymmetric laminated nonwoven fabric was heat-rolled for 10 minutes at a pressure of 5 kg / cm 2 at 130 ° C. with a polyester / polypropylene nonwoven fabric having a thickness of 95 μm and a density of 0.36 g / cm 3 and a polypropylene nonwoven fabric having a thickness of 140 μm and a density of 0.399 g / cm 3. Produced. Thereafter, the asymmetric mixed nonwoven fabric was immersed in a solution prepared by dissolving 5% by weight of ethylene chlorotrifluoroethylene (ECTFE) resin (Mw; 450,000) in tetrahydrofuran, and then dipped at room temperature to a porous filter sheet. An air conditioner for air conditioning was produced.
<실시예 2><Example 2>
두께 86㎛ 및 밀도 0.30g/㎤의 폴리프로필렌 부직포와 두께 120㎛ 및 밀도 0.417 g/㎤의 폴리프로필렌 부직포를 합지하는 것을 제외하고는, 상기 실시예 1과 동일하게 수행하여 다공성 여과시트로 이루어진 공조용 에어필터를 제조하였다. An air conditioner composed of a porous filter sheet was formed in the same manner as in Example 1, except that a polypropylene nonwoven fabric having a thickness of 86 µm and a density of 0.30 g / cm 3 and a polypropylene nonwoven fabric having a thickness of 120 µm and a density of 0.417 g / cm 3 were laminated. An air filter was prepared.
<실시예 3><Example 3>
두께 63㎛ 및 밀도 0.22g/㎤의 폴리에스테르/폴리프로필렌 부직포와 두께 120㎛ 및 밀도 0.417g/㎤의 폴리프로필렌 부직포를 합지하는 것을 제외하고는, 상기 실시예 1과 동일하게 수행하여 다공성 여과시트로 이루어진 공조용 에어필터를 제조하였다.The porous filter sheet was carried out in the same manner as in Example 1, except that a polyester / polypropylene nonwoven fabric having a thickness of 63 μm and a density of 0.22 g / cm 3 and a polypropylene nonwoven fabric having a thickness of 120 μm and a density of 0.417 g / cm 3 were laminated. An air filter for air conditioning was prepared.
<비교예 1∼3> <Comparative Examples 1 to 3>
상기 실시예 1 내지 3에서 제조된 각각의 비대칭 합지부직포에 에틸렌클로로트리플루오로에틸렌(ECTFE) 수지 함유용액으로 코팅 처리하지 않은 것을 제외하고는, 상기 실시예 1과 동일하게 수행하여 다공성 여과시트로 이루어진 공조용 에어필터를 제조하였다. Except that each of the asymmetric laminated nonwoven fabric prepared in Examples 1 to 3 was not coated with a solution containing ethylene chlorotrifluoroethylene (ECTFE) resin, the same procedure as in Example 1 was carried out as a porous filter sheet An air conditioner for air conditioning was produced.
<비교예 4> ≪ Comparative Example 4 &
두께 140㎛ 및 밀도 0.399g/㎤의 폴리프로필렌 부직포 단독으로 이루어진 것을 제외하고는, 상기 실시예 1과 동일하게 수행하여 다공성 여과시트로 이루어진 공조용 에어필터를 제조하였다. Except for using a polypropylene nonwoven fabric having a thickness of 140㎛ and a density of 0.399g / ㎠ alone, it was carried out in the same manner as in Example 1 to prepare an air-conditioning air filter consisting of a porous filter sheet.
<비교예 5> ≪ Comparative Example 5 &
두께 100㎛ 및 밀도 0.350g/㎤의 폴리프로필렌 부직포 및 두께 86㎛ 및 밀도 0.301g/㎤의 폴리프로필렌 합지부직포로 구성되되, 합지부직포의 밀도가 0.65 g/㎤인 것을 제외하고는, 상기 실시예 1과 동일하게 수행하여 다공성 여과시트로 이루어진 공조용 에어필터를 제조하였다.The above embodiment is composed of a polypropylene nonwoven fabric having a thickness of 100 µm and a density of 0.350 g / cm 3 and a polypropylene laminated nonwoven fabric having a thickness of 86 µm and a density of 0.301 g / cm 3, except that the density of the laminated nonwoven fabric is 0.65 g / cm 3. 1 was prepared in the same manner to prepare an air filter for air conditioning consisting of a porous filter sheet.
<실험예 1> 압력손실 및 포집효율의 측정Experimental Example 1 Measurement of Pressure Loss and Collection Efficiency
상기 실시예 1 내지 3 및 비교예 1 내지 3에서 제조된 다공성 여과시트로 이루어진 공조용 에어필터의 성능평가를 위하여, 각각의 다공성 여과시트(여과면적; 78.5 ㎠)를 에어필터 성능 평가기(TSI 8127)에 장착하고 NaCl 에어로졸(농도; 20mg/㎥)을 85L/min의 유량으로 공급한 후 하기와 같은 수학식 1 및 2에 따라 압력손실과 포집효율을 측정하여 하기 표 1에 기재하였다.In order to evaluate the performance of the air filter for air conditioning consisting of the porous filter sheets prepared in Examples 1 to 3 and Comparative Examples 1 to 3, each porous filter sheet (filtration area; 78.5 cm 2) to the air filter performance evaluator (TSI 8127) and supplied with NaCl aerosol (concentration; 20 mg / m 3) at a flow rate of 85 L / min, and the pressure loss and collection efficiency were measured according to Equations 1 and 2 as described in Table 1 below.
수학식 1Equation 1
압력손실 = 유입측 압력 ― 유출측 압력Pressure Loss = Inlet Pressure-Outlet Pressure
수학식 2Equation 2
<실험예 2> 탈진율의 측정Experimental Example 2 Measurement of Dust Removal Rate
상기 실시예 1 내지 3 및 비교예 1 내지 3에서 제조된 공조용 에어필터의 성능평가를 위하여, 탈진율을 측정하였다. For evaluating the performance of the air filter for air conditioning manufactured in Examples 1 to 3 and Comparative Examples 1 to 3, the dust removal rate was measured.
상기 실시예 1 내지 3 및 비교예 1 내지 3에서 제조된 각각의 다공성 여과시트(여과면적; 78.5㎠)를 물로 세척하고, 세척전의 포집효율과 세척후의 포집효율을 비교 실험하였다. Each of the porous filter sheets (filtration area; 78.5 cm 2) prepared in Examples 1 to 3 and Comparative Examples 1 to 3 was washed with water, and the collection efficiency before washing and the collecting efficiency after washing were compared.
그 결과, 세척전 후의 포집효율의 차이가 5% 이하이면, "좋음"으로 표기하고, 세척전 후의 포집효율의 차이가 5%를 초과하면, "나쁨"으로 표기하였다.As a result, when the difference in collection efficiency before and after washing is 5% or less, it is described as "good", and when the difference in collection efficiency before and after washing exceeds 5%, it is described as "bad".
상기 표 1에서 확인되는 바와 같이, 불소수지로 코팅처리하지 않은 부직포 공조용 에어필터의 경우, 물로 세척 전에 비해 세척 후 압력손실은 크게 증가하지 않았으나, 포집효율이 뚜렷이 감소한 결과를 보였다. As confirmed in Table 1, in the case of the air filter for non-woven air conditioning not coated with fluorine resin, the pressure loss after washing did not increase significantly compared to before washing with water, but the collection efficiency was clearly reduced.
반면에, 불소수지로 코팅처리된 실시예 1 내지 실시예 3의 공조용 에어필터는 세척전 후를 비교할 때 압력손실과 포집효율간에 뚜렷한 차이가 발견되지 않았다. 또한 코팅된 합지부직포와 미코팅된 합지부직포를 비교해 볼 때, 코팅 후 밀도증가에도 불구하고 압력손실은 크게 증가하지 않았으나, 포집효율은 상승하는 효과를 확인하였다. On the other hand, the air filter for air conditioning of Examples 1 to 3 coated with the fluorine resin did not find a significant difference between the pressure loss and the collection efficiency when comparing before and after washing. In addition, when comparing the coated nonwoven fabric and the uncoated laminated nonwoven fabric, the pressure loss did not increase significantly despite the increase in density after coating, but the collection efficiency was confirmed to increase.
반면에, 합지부직포의 밀도를 증가시키면(비교예 5), 포집효율은 개선되나 압력손실이 증가하여 사용에 부적합함을 알 수 있었다. 이에, 본 발명의 에어필터의 물성향상은 에틸렌클로로트리플루오로에틸렌(ECTFE) 함유 코팅액의 소수성과 밀도 구배로 인한 비대칭 합지부직포 구조에 기인함을 확인할 수 있었다. On the other hand, when the density of the laminated nonwoven fabric was increased (Comparative Example 5), the collection efficiency was improved, but the pressure loss was increased, which makes it unsuitable for use. Thus, the improvement of the physical properties of the air filter of the present invention was confirmed that due to the asymmetric laminated nonwoven structure due to the hydrophobicity and density gradient of the coating liquid containing ethylenechlorotrifluoroethylene (ECTFE).
상기에서 살펴본 결과, 본 발명은 밀도가 서로 다른 2종 이상의 부직포가 열압연을 통해 합지된 합지부직포상에 불소수지함유 코팅액이 코팅 또는 함침된 비대칭 다공성 시트를 제공하였다. As a result, the present invention provides an asymmetric porous sheet coated or impregnated with a fluororesin-containing coating solution on a laminated nonwoven fabric having two or more kinds of nonwoven fabrics having different densities of which are different from each other by thermal rolling.
본 발명의 비대칭 다공성 시트는 비대칭 기공분포와 밀도 구배를 가지도록 다층구조로 배치된 합지부직포에 의해 우수한 필터수명, 통풍성, 포집효율 및 탈진효율을 가지며, 시트 표면이 소수성으로 구성되어 반복사용이 가능하다. 또한 본 발명의 비대칭 다공성 시트 제조방법은 우수한 물성을 구현할 뿐 아니라, 연속생산이 가능하고 제조공정이 간단하여 생산성을 향상시킬 수 있다. The asymmetric porous sheet of the present invention has excellent filter life, air permeability, collection efficiency and dust removal efficiency by a laminated nonwoven fabric arranged in a multilayer structure to have an asymmetric pore distribution and a density gradient, and the surface of the sheet is hydrophobic and can be used repeatedly. Do. In addition, the asymmetric porous sheet manufacturing method of the present invention not only implements excellent physical properties, but also enables continuous production and a simple manufacturing process, thereby improving productivity.
나아가, 본 발명의 비대칭 다공성 시트는 우수한 필터수명, 통풍성, 포집효율 및 탈진효율을 가지며, 시트 표면이 소수성으로 구성되어 반복사용이 가능하므로 공기중의 미세먼지, 입자 등을 제거하기 위한 공조용 에어필터로 유용하다.
Furthermore, the asymmetric porous sheet of the present invention has excellent filter life, air permeability, collection efficiency and dust removal efficiency, and the surface of the sheet is composed of hydrophobic and can be repeatedly used, so that the air for air conditioning to remove fine dust, particles, etc. in the air Useful as a filter.
이상에서 본 발명은 기재된 구체적인 예에 대해서만 상세히 설명되었지만 본 발명의 기술사상 범위내에서 다양한 변형 및 수정이 가능함은 당 업자에게 있어서 명백한 것이며, 이러한 변형 및 수정이 첨부된 특허청구범위에 속함은 당연한 것이다. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. .
Claims (9)
불소수지 함유 코팅액이 코팅 또는 함침된 비대칭 다공성 시트. On a laminated nonwoven fabric arranged in a multilayer structure to have an asymmetric density gradient,
Asymmetric porous sheet coated or impregnated with a fluororesin-containing coating solution.
상기 합지부직포 상에 에틸렌클로로트리플루오로에틸렌 2 내지 20중량% 및 휘발성 용매 80 내지 98중량%로 이루어진 불소수지 함유 코팅액을 코팅 또는 침지하는 제2공정 및
상온 또는 상온 내지 60℃온도의 열풍 또는 적외선에 의해 건조하는 제3공정으로 수행되는 것을 특징으로 하는 비대칭 다공성 시트의 제조방법.A first process of disposing two or more kinds of nonwoven fabrics having different densities and hot rolling to form a laminated nonwoven fabric of a polyester-based material having a density of 0.2 to 0.6 g / cm 3 and a thickness of 100 to 500 µm;
A second step of coating or immersing a fluororesin-containing coating liquid comprising 2 to 20% by weight of ethylene chlorotrifluoroethylene and 80 to 98% by weight of a volatile solvent on the laminated nonwoven fabric;
Method for producing an asymmetric porous sheet, characterized in that carried out in a third step of drying by hot air or infrared light at room temperature or room temperature to 60 ℃ temperature.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9677553B2 (en) | 2013-06-28 | 2017-06-13 | Lg Electronics Inc. | Linear compressor |
| US9695810B2 (en) | 2013-06-28 | 2017-07-04 | Lg Electronics Inc. | Linear compressor |
| US9695811B2 (en) | 2013-06-28 | 2017-07-04 | Lg Electronics Inc. | Linear compressor |
| US9714648B2 (en) | 2013-06-28 | 2017-07-25 | Lg Electronics Inc. | Linear compressor |
| US9726164B2 (en) | 2013-06-28 | 2017-08-08 | Lg Electronics Inc. | Linear compressor |
| US10634127B2 (en) | 2013-06-28 | 2020-04-28 | Lg Electronics Inc. | Linear compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7516822B2 (en) * | 2020-03-31 | 2024-07-17 | 三菱ケミカル株式会社 | Laminated Polyester Film |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11347322A (en) * | 1998-06-05 | 1999-12-21 | Toyobo Co Ltd | Multilayer felt |
| JP2003236319A (en) | 2002-02-15 | 2003-08-26 | Asahi Kasei Corp | Indoor air ventilation filter and method for manufacturing the same |
| KR20070067884A (en) * | 2005-12-26 | 2007-06-29 | (주)크린앤사이언스 | Filter element for cleaning air and process for preparing the same |
| KR100952421B1 (en) | 2006-12-27 | 2010-04-14 | (주)크린앤사이언스 | Filter element for cleaning inlet air of internal combustion engine and process for preparing the same |
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2011
- 2011-12-27 KR KR1020110143904A patent/KR101308358B1/en not_active IP Right Cessation
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9677553B2 (en) | 2013-06-28 | 2017-06-13 | Lg Electronics Inc. | Linear compressor |
| US9695810B2 (en) | 2013-06-28 | 2017-07-04 | Lg Electronics Inc. | Linear compressor |
| US9695811B2 (en) | 2013-06-28 | 2017-07-04 | Lg Electronics Inc. | Linear compressor |
| US9714648B2 (en) | 2013-06-28 | 2017-07-25 | Lg Electronics Inc. | Linear compressor |
| US9726164B2 (en) | 2013-06-28 | 2017-08-08 | Lg Electronics Inc. | Linear compressor |
| US10634127B2 (en) | 2013-06-28 | 2020-04-28 | Lg Electronics Inc. | Linear compressor |
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| Publication number | Publication date |
|---|---|
| KR101308358B1 (en) | 2013-09-16 |
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