WO2014126443A1 - 필터 여재 및 그 제조방법과, 이를 이용한 필터 장치 - Google Patents
필터 여재 및 그 제조방법과, 이를 이용한 필터 장치 Download PDFInfo
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- WO2014126443A1 WO2014126443A1 PCT/KR2014/001295 KR2014001295W WO2014126443A1 WO 2014126443 A1 WO2014126443 A1 WO 2014126443A1 KR 2014001295 W KR2014001295 W KR 2014001295W WO 2014126443 A1 WO2014126443 A1 WO 2014126443A1
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- Prior art keywords
- nanofiber web
- polymer material
- nonwoven fabric
- electrospinning
- filter medium
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000002121 nanofiber Substances 0.000 claims abstract description 156
- 238000001523 electrospinning Methods 0.000 claims abstract description 43
- 239000011148 porous material Substances 0.000 claims abstract description 41
- 238000002844 melting Methods 0.000 claims abstract description 32
- 230000008018 melting Effects 0.000 claims abstract description 32
- 239000000853 adhesive Substances 0.000 claims abstract description 15
- 230000001070 adhesive effect Effects 0.000 claims abstract description 15
- 239000004745 nonwoven fabric Substances 0.000 claims description 126
- 239000002861 polymer material Substances 0.000 claims description 70
- 239000000758 substrate Substances 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 23
- 239000000243 solution Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
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- 239000000463 material Substances 0.000 abstract description 18
- 239000000126 substance Substances 0.000 abstract description 7
- 229920000642 polymer Polymers 0.000 abstract description 5
- 239000012528 membrane Substances 0.000 description 26
- 239000002033 PVDF binder Substances 0.000 description 19
- 238000001914 filtration Methods 0.000 description 18
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- -1 meshes Substances 0.000 description 12
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000012779 reinforcing material Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 239000002202 Polyethylene glycol Substances 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000001471 micro-filtration Methods 0.000 description 3
- 229920002492 poly(sulfone) Polymers 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000000020 Nitrocellulose Substances 0.000 description 2
- 239000004695 Polyether sulfone Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
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- 238000001728 nano-filtration Methods 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
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- 230000035699 permeability Effects 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
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- 230000007704 transition Effects 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- MUZDXNQOSGWMJJ-UHFFFAOYSA-N 2-methylprop-2-enoic acid;prop-2-enoic acid Chemical compound OC(=O)C=C.CC(=C)C(O)=O MUZDXNQOSGWMJJ-UHFFFAOYSA-N 0.000 description 1
- 229920008347 Cellulose acetate propionate Polymers 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229920012266 Poly(ether sulfone) PES Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004697 Polyetherimide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- HLKZFSVWBQSKKH-UHFFFAOYSA-N but-3-enoic acid;1-ethenylpyrrolidin-2-one Chemical compound OC(=O)CC=C.C=CN1CCCC1=O HLKZFSVWBQSKKH-UHFFFAOYSA-N 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 229920006217 cellulose acetate butyrate Polymers 0.000 description 1
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- 238000010612 desalination reaction Methods 0.000 description 1
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- 150000002334 glycols Chemical class 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229920001477 hydrophilic polymer Polymers 0.000 description 1
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- 239000004750 melt-blown nonwoven Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- GKTNLYAAZKKMTQ-UHFFFAOYSA-N n-[bis(dimethylamino)phosphinimyl]-n-methylmethanamine Chemical compound CN(C)P(=N)(N(C)C)N(C)C GKTNLYAAZKKMTQ-UHFFFAOYSA-N 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920001643 poly(ether ketone) Polymers 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920002627 poly(phosphazenes) Polymers 0.000 description 1
- 229920005569 poly(vinylidene fluoride-co-hexafluoropropylene) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920005597 polymer membrane Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920002215 polytrimethylene terephthalate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
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- 239000004800 polyvinyl chloride Substances 0.000 description 1
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Images
Classifications
-
- 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
- B01D69/10—Supported membranes; Membrane supports
- B01D69/107—Organic support material
- B01D69/1071—Woven, non-woven or net mesh
-
- 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
- B01D69/10—Supported membranes; Membrane supports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
- B01D67/0004—Organic membrane manufacture by agglomeration of particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/39—Electrospinning
Definitions
- the present invention relates to a water treatment filter, and more particularly, to a filter medium employing a nanofiber web produced by electrospinning, a method of manufacturing the same, and a filter device using the same.
- the gas separation can be separated in detail according to the type of gas to be separated.
- the membrane for separating oxygen gas it is classified into oxygen enrichment, and in case of the membrane for separating nitrogen, nitrogen enrichment, hydrogen separation, and dehumidification membrane.
- Classification by material includes inorganic membrane and organic membrane using polymer. Recently, the inorganic membrane is expanding its use based on the advantages of heat resistance, durability, etc., but most of the commercialized membrane is occupied by polymer membrane.
- filtration means separating two or more kinds of components from a fluid, that is, separating undissolved particles (solids).
- the filtration mechanism in the separation of solids can be explained by the sieving, adsorption, dissolution, and diffusion mechanisms, and most of them are completely dependent on the sieving mechanism except for some separation membranes such as gas separation membranes and reverse osmosis membranes.
- Typical filter media include nonwovens, fabrics, meshes, and porous membranes.
- Nonwoven fabrics, fabrics, meshes, etc. are difficult to make pores of less than 1um, so they are limited to the particle filtration area and are used as pretreatment filter concepts.
- Porous membranes on the other hand, can produce precise and small pores, providing a wide range of filtration zones, including micro filtration, ultra filtration, nano filtration and reverse osmosis filtration. It is used for the required process.
- Nonwovens, meshes, and fabrics are made from fibers of several micros to hundreds of microns, making it difficult to produce micropores of less than one micron.
- the web is formed by a random arrangement of fibers, so that it is virtually impossible to make uniform pores.
- Melt-blown is a non-woven fabric made of very fine fibers with wire diameters in the range of 1 to 5 um.
- the pore size before thermal calendering is more than 6 microns and the pore size after calendering is about 3 It is only micro, and the average pore size deviation is more than ⁇ 20% around the reference point, and the structure has a large coexistence.
- the filter media are used as a pretreatment concept in an inexact filtration process or a microfiltration process.
- the porous membrane is prepared by a method such as solvent phase transition (NIPS), thermal induction phase transition (TIPS), stretching process, track etching method, sol-gel method, etc.
- NIPS solvent phase transition
- TIPS thermal induction phase transition
- organic polymers such as polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), nylon (Nylon 6, Nylon 66), polysulfone (PS), polyether sulfone (PES), polypropylene (PP), polyethylene ( PE), nitrocellulose (NC) and the like are typically used.
- PTFE polytetrafluoroethylene
- PVDF polyvinylidene fluoride
- PS polysulfone
- PS polyether sulfone
- PP polypropylene
- PE polyethylene
- NC nitrocellulose
- Such conventional porous membranes can produce precise and small sized pores, while closed pores or blind pores inevitably occur in the manufacturing process, so that the filtration flow rate is low and the operating pressure
- Korean Unexamined Patent Publication No. 2013-0011192 discloses a method for producing an alumina composite nonwoven fabric comprising a first step of modifying a surface by plasma treating a thermoplastic polymer fiber nonwoven fabric and a second step of depositing alumina on the surface treated nonwoven fabric.
- the filter media using the alumina composite nonwoven fabric is excellent in virus removal performance without damage due to fiber cutting, but has a disadvantage of low filtering efficiency due to the large pore size of the nonwoven fabric.
- An object of the present invention is to produce a filter medium using a nanofiber web formed by electrospinning, to improve the durability and to freely control the pore size to filter a filter medium that can make a variety of products according to the purpose of use It is to provide a manufacturing method and a filter device using the same.
- Another object of the present invention is to manufacture a filter medium using a nanofiber web formed by electrospinning, so that the thickness of the filter medium can be made thin, and thus the thickness of the filter plate can be made thin so that many filter plates can be made in a small space.
- the present invention provides a filter medium and a method of manufacturing the same, and a filter device using the same, which can be stacked to reduce the size of the filtration system.
- Still another object of the present invention is to stack a nanofiber web having a three-dimensional micropores and a nonwoven fabric, to improve handling and strength, and to improve filter efficiency, a filter medium and a method of manufacturing the same, and a filter device using the same. To provide.
- Filter media for achieving the above object, a porous substrate; A nanofiber web stacked on both sides of the porous substrate and having a plurality of fine pores formed by electrospinning a polymer material; And an adhesive means for integrally bonding the porous substrate and the nanofiber web, wherein the adhesive means is a thermal fusion structure formed by applying heat lower than the melting point of the porous substrate and higher than the melting point of the nanofiber web.
- the bonding means may be a thermal fusion structure formed by applying heat higher than the melting point of the porous substrate and lower than the melting point of the nanofiber web.
- the adhesive means may be a hot melt powder or hot melt web.
- the hot melt powder it is possible to secure air permeability after adhesion by arranging in the form of a dot array, and in the case of the hot melt web, it is possible to secure air permeability after adhesion because it has a large number of fine pores.
- the porous substrate is a nonwoven fabric of any one of polyester series, nylon series, polyolefin series and cellulose series, and the polymer material forming the nanofiber web may include PVdF.
- the polymer material may be a polymer material in which PVdF and PAN are mixed at 5: 5 or 6: 4.
- the heat-sealed structure is a structure in which 1/5 to 1/2 thick portion of the nanofiber web penetrates and adheres to the nonwoven fabric, or 1/5 to 1/2 thick portion of the nonwoven fabric is the nonwoven fabric. It may be a structure that penetrates and adheres to.
- the present invention may have a structure in which the nanofiber web is laminated on the entire surface except the upper surface of the nonwoven fabric.
- the filter medium is a porous substrate; And a nanofiber web having a plurality of micropores formed by directly electrospinning a polymer material on both sides of the porous substrate, wherein the nanofiber web comprises: electrospinning, coating or spraying a low concentration polymer material mixture solution. And a second nanofiber web layer formed by electrospinning the first nanofiber web layer formed by the electroconcentration and a high concentration of the polymer material mixed solution.
- the low concentration polymer material solution may contain 8 to 10 wt% of the polymer material
- the high concentration polymer material solution may contain 15 to 17 wt% of the polymer material.
- the method for producing a filter medium for achieving the object of the present invention preparing a nonwoven fabric; Electrospinning the polymer material onto the release paper to form a nanofiber web; And laminating the nanofiber web on both sides of the nonwoven fabric to heat-bond the nonwoven fabric and the nanofiber web by heating to a temperature lower than the melting point of the nonwoven fabric and higher than the melting point of the nanofiber web.
- the heat fusion bonding step may be a method of heat fusion bonding the nonwoven fabric and the nanofiber web by heating to a temperature higher than the melting point of the nonwoven fabric and lower than the melting point of the nanofiber web.
- a method of manufacturing a filter medium may include preparing a nonwoven fabric; Forming a nanofiber web by sequentially electrospinning a low concentration polymer mixture solution containing 8 to 10 wt% of a polymer material and a high concentration polymer mixture solution containing 15 to 17 wt% of a polymer material on one surface of the nonwoven fabric; And sequentially forming a nanofiber web by electrospinning a low concentration polymer material mixed solution containing 8 to 10 wt% of a polymer material and a high concentration polymer material mixed solution containing 15 to 17 wt% of a polymer material on the other side of the nonwoven fabric.
- a method of manufacturing a filter medium includes preparing a nonwoven fabric; Electrospinning the polymer material onto the release paper to form a nanofiber web; And laminating and thermally compressing the nanofiber web through both hot melt powder or hot melt webs on both sides of the nonwoven fabric.
- a filter device for achieving the object of the present invention, the housing having a waste water inlet and outlet; A plurality of filter media arranged in the housing at a predetermined interval, the filter media having a structure as described above for filtering the waste water stored in the housing; And a pump connected to the outlet to pump water in the housing or to supply washing water into the housing.
- the nanofiber web formed by electrospinning is bonded to both sides of the nonwoven fabric using a heat-sealed structure or a hot melt adhesive to prepare a filter medium, thereby improving durability and freely pore size.
- the present invention by manufacturing a filter medium using a nanofiber web formed by electrospinning, it is possible to make the thickness of the filter medium thinner, thereby making the thickness of the filter plate thin, thereby stacking many filter plates in a small space. This can reduce the size of the filtration system.
- a filter medium by laminating a nanofiber web having three-dimensional micropores and a nonwoven fabric, it is possible to provide a filter device that is excellent in handleability and strength and can improve filter efficiency.
- FIG. 1 is a cross-sectional view of a filter device according to an embodiment of the present invention.
- FIG. 2 is a plan view of a filter medium according to an embodiment of the present invention.
- FIG. 3 is a cross-sectional view of the filter medium according to an embodiment of the present invention.
- FIG. 4 is an enlarged photograph of a nanofiber web according to an embodiment of the present invention.
- FIG. 5 is a block diagram of an electrospinning apparatus for forming a nanofiber web of the filter medium according to an embodiment of the present invention
- FIG. 6 is a partial cross-sectional view for explaining a filter medium according to an embodiment of the present invention.
- FIG. 7 is an enlarged cross-sectional view of a nanofiber web applied to a filter medium according to an embodiment of the present invention.
- FIG. 1 is a cross-sectional view of a filter device according to an embodiment of the present invention.
- the area of the nanofiber web in contact with the nonwoven fabric is melted and fused with the nonwoven fabric.
- the pore size of the nonwoven fabric is much larger than the pore size of the nanofiber web, a part of the molten nanofiber web will penetrate into the pores of the nonwoven fabric. That is, as shown in Figure 6, based on the interface 29 of the nonwoven fabric and the nanofiber web before thermal compression, after the thermal compression is melted in the nanofiber web direction (A) and nonwoven fabric direction (B) at the interface 29 The nanofiber web is diffused and distributed.
Abstract
Description
Claims (17)
- 다공성 기재;상기 다공성 기재의 양측에 적층되며, 고분자 물질을 전기 방사하여 형성된 다수의 미세 기공을 갖는 나노 섬유 웹; 및상기 다공성 기재와 상기 나노 섬유 웹을 일체로 접착시키는 접착수단;을 포함하며, 상기 접착수단은,상기 다공성 기재의 융점보다는 낮고 상기 나노섬유 웹의 융점보다는 높은 열을 가하여 이루어지는 열 융착 구조인 필터 여재.
- 제1항에 있어서,상기 다공성 기재는 폴리에스터 계열, 나일론 계열, 폴리올레핀 계열 및 셀룰로오스 계열 중 어느 한 계열의 부직포이고,상기 나노 섬유 웹을 형성하는 고분자 물질은 PVdF를 포함하는 필터 여재.
- 제2항에 있어서,상기 고분자 물질은 PVdF와 PAN을 5:5 또는 6:4로 혼합한 고분자 물질인 필터 여재.
- 제2항에 있어서,상기 열 융착 구조는,상기 나노 섬유 웹의 1/5내지 1/2 두께 부분이 녹아 상기 부직포에 침투하여 접착되어 있는 구조인 필터 여재.
- 제2항에 있어서,상기 나노 섬유 웹이 상기 부직포의 상면을 제외한 전체 면에 적층되어 있는 구조인 필터 여재.
- 다공성 기재; 및상기 다공성 기재의 양측에 고분자 물질을 직접 전기 방사하여 형성된 다수의 미세 기공을 갖는 나노 섬유 웹;을 포함하며,상기 나노 섬유 웹은, 저농도의 고분자 물질 혼합 용액을 전기 방사하여 형성된 제1나노 섬유 웹층과, 고농도의 고분자 물질 혼합 용액을 전기 방사하여 형성된 제2나노 섬유 웹층으로 이루어진 필터 여재.
- 제6항에 있어서,상기 저농도의 고분자 물질 혼합 용액은 고분자 물질이 8~10wt% 함유된 것이고, 상기 고농도 고분자 물질 혼합 용액은 고분자 물질이 15~17wt% 함유된 것인 필터 여재.
- 제6항에 있어서,상기 다공성 기재는 폴리에스터 계열, 나일론 계열 및 셀룰로오스 계열 중 어느 한 계열의 부직포이고,상기 나노 섬유 웹을 형성하는 고분자 물질은 PVdF를 포함하는 필터 여재.
- 제8항에 있어서,상기 고분자 물질은 PVdF와 PAN을 5:5 내지 6:4로 혼합한 고분자 물질인 필터 여재.
- 다공성 기재;상기 다공성 기재의 양측에 적층되며, 고분자 물질을 전기 방사하여 형성된 다수의 미세 기공을 갖는 나노 섬유 웹; 및상기 다공성 기재와 상기 나노 섬유 웹을 일체로 접착시키는 접착수단;을 포함하며, 상기 접착수단은,상기 다공성 기재의 융점보다 높고 상기 나노섬유 웹의 융점보다는 낮은 열을 가하여 이루어지는 열 융착 구조인 필터 여재.
- 다공성 기재;상기 다공성 기재의 양측에 적층되며, 고분자 물질을 전기 방사하여 형성된 다수의 미세 기공을 갖는 나노 섬유 웹; 및상기 다공성 기재와 상기 나노 섬유 웹을 일체로 접착시키는 접착수단;을 포함하며, 상기 접착수단은,핫 멜트 파우더 또는 핫 멜트 웹인 필터 여재.
- 부직포를 준비하는 단계;이형지에 고분자 물질을 전기방사하여 나노 섬유 웹을 형성하는 단계; 및상기 부직포의 양면에 상기 나노 섬유 웹을 합지하여 상기 부직포의 융점보다는 낮고 상기 나노 섬유 웹의 융점보다는 높은 온도로 가열하여 부직포와 나노 섬유 웹을 열융착 접합하는 단계;를 포함하는 필터 여재의 제조방법.
- 부직포를 준비하는 단계;이형지에 고분자 물질을 전기방사하여 나노 섬유 웹을 형성하는 단계; 및상기 부직포의 양면에 상기 나노 섬유 웹을 합지하여 상기 부직포의 융점보다 높고 상기 나노 섬유 웹의 융점보다는 낮은 온도로 가열하여 부직포와 나노 섬유 웹을 열융착 접합하는 단계;를 포함하는 필터 여재의 제조방법.
- 부직포를 준비하는 단계;이형지에 고분자 물질을 전기방사하여 나노 섬유 웹을 형성하는 단계; 및상기 부직포의 양면에 핫 멜트 파우더 또는 핫 멜트 웹을 개재하여 상기 나노 섬유 웹을 합지하고 열압착하는 단계;를 포함하는 필터 여재의 제조방법.
- 부직포를 준비하는 단계;상기 부직포의 일면에 고분자 물질이 8~10wt% 함유된 저농도 고분자 물질 혼합 용액과 고분자 물질이 15~17wt% 함유된 고농도 고분자 물질 혼합 용액을 순차적으로 전기 방사하여 나노 섬유 웹을 형성하는 단계; 및상기 부직포의 타면에 고분자 물질이 8~10wt% 함유된 저농도 고분자 물질 혼합 용액과 고분자 물질이 15~17wt% 함유된 고농도 고분자 물질 혼합 용액을 순차적으로 전기 방사하여 나노 섬유 웹을 형성하는 단계;를 포함하는 필터 여재의 제조방법.
- 오폐수 유입구 및 배출구를 구비하는 하우징;상기 하우징 내에 일정 간격을 두고 배열되어, 하우징 내에 저장된 오폐수를 여과하는 청구항 제1항 내지 제11항 중 어느 한 항에 기재된 다수의 필터 여재; 및상기 배출구에 연결되어 상기 하우징 내부의 물을 펌핑하거나 세척수를 하우징 내부로 공급하는 펌프;를 포함하는 필터 장치.
- 제16항에 있어서,상기 하우징의 일측에 설치되어 필터 여재를 세척하는 기능을 하는 기포 발생용 노즐을 포함하는 필터 장치.
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US14/768,271 US20150360157A1 (en) | 2013-02-18 | 2014-02-18 | Filter medium, manufacturing method therefor, and filter equipment using same |
BR112015019842-2A BR112015019842B1 (pt) | 2013-02-18 | 2014-02-18 | Aparelho de filtro que usa o meio de filtro |
CN201480009257.1A CN104994928B (zh) | 2013-02-18 | 2014-02-18 | 过滤介质及其制备方法和利用其的过滤装置 |
US16/033,534 US10525686B2 (en) | 2013-02-18 | 2018-07-12 | Filter apparatus having a housing and filter media inside the housing |
US16/682,483 US11084266B2 (en) | 2013-02-18 | 2019-11-13 | Filter medium, manufacturing method therefor, and filter equipment using same |
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