JP2022080150A - Pleat filter and manufacturing method thereof - Google Patents
Pleat filter and manufacturing method thereof Download PDFInfo
- Publication number
- JP2022080150A JP2022080150A JP2020191159A JP2020191159A JP2022080150A JP 2022080150 A JP2022080150 A JP 2022080150A JP 2020191159 A JP2020191159 A JP 2020191159A JP 2020191159 A JP2020191159 A JP 2020191159A JP 2022080150 A JP2022080150 A JP 2022080150A
- Authority
- JP
- Japan
- Prior art keywords
- pyrrole
- base material
- core
- woven fabric
- nonwoven fabric
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims abstract description 76
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 69
- 239000000835 fiber Substances 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 43
- 239000000470 constituent Substances 0.000 claims abstract description 23
- 239000002131 composite material Substances 0.000 claims abstract description 20
- 239000000306 component Substances 0.000 claims abstract description 16
- 238000002844 melting Methods 0.000 claims abstract description 15
- 230000008018 melting Effects 0.000 claims abstract description 15
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 15
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 15
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 15
- 239000008358 core component Substances 0.000 claims abstract description 12
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 3
- 239000000178 monomer Substances 0.000 claims description 18
- 229920000642 polymer Polymers 0.000 claims description 17
- 229920000728 polyester Polymers 0.000 claims description 11
- 230000004927 fusion Effects 0.000 claims description 7
- 239000002685 polymerization catalyst Substances 0.000 claims description 7
- 238000003851 corona treatment Methods 0.000 claims description 3
- 238000009832 plasma treatment Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims 2
- 229920000128 polypyrrole Polymers 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 abstract description 2
- 229920001634 Copolyester Polymers 0.000 abstract 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 230000035699 permeability Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 5
- 239000002019 doping agent Substances 0.000 description 4
- 238000002074 melt spinning Methods 0.000 description 4
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 125000000168 pyrrolyl group Chemical group 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- OXHNLMTVIGZXSG-UHFFFAOYSA-N 1-Methylpyrrole Chemical compound CN1C=CC=C1 OXHNLMTVIGZXSG-UHFFFAOYSA-N 0.000 description 1
- MFFMQGGZCLEMCI-UHFFFAOYSA-N 2,4-dimethyl-1h-pyrrole Chemical compound CC1=CNC(C)=C1 MFFMQGGZCLEMCI-UHFFFAOYSA-N 0.000 description 1
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 description 1
- RLLBWIDEGAIFPI-UHFFFAOYSA-N 3-ethyl-1h-pyrrole Chemical compound CCC=1C=CNC=1 RLLBWIDEGAIFPI-UHFFFAOYSA-N 0.000 description 1
- FEKWWZCCJDUWLY-UHFFFAOYSA-N 3-methyl-1h-pyrrole Chemical compound CC=1C=CNC=1 FEKWWZCCJDUWLY-UHFFFAOYSA-N 0.000 description 1
- WFHVTZRAIPYMMO-UHFFFAOYSA-N 3-octyl-1h-pyrrole Chemical compound CCCCCCCCC=1C=CNC=1 WFHVTZRAIPYMMO-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- FDOCOSUCHDHMCW-UHFFFAOYSA-K benzenesulfonate iron(3+) Chemical compound [Fe+3].[O-]S(=O)(=O)c1ccccc1.[O-]S(=O)(=O)c1ccccc1.[O-]S(=O)(=O)c1ccccc1 FDOCOSUCHDHMCW-UHFFFAOYSA-K 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- FYMCOOOLDFPFPN-UHFFFAOYSA-K iron(3+);4-methylbenzenesulfonate Chemical compound [Fe+3].CC1=CC=C(S([O-])(=O)=O)C=C1.CC1=CC=C(S([O-])(=O)=O)C=C1.CC1=CC=C(S([O-])(=O)=O)C=C1 FYMCOOOLDFPFPN-UHFFFAOYSA-K 0.000 description 1
- LHOWRPZTCLUDOI-UHFFFAOYSA-K iron(3+);triperchlorate Chemical compound [Fe+3].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O LHOWRPZTCLUDOI-UHFFFAOYSA-K 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Chemical Or Physical Treatment Of Fibers (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Multicomponent Fibers (AREA)
Abstract
Description
本発明は、帯電防止性に優れたプリーツフィルター及びその製造方法に関し、特にプリーツの山部及び谷部における帯電防止性に優れたプリーツフィルター及びその製造方法に関するものである。 The present invention relates to a pleated filter having excellent antistatic properties and a method for manufacturing the same, and more particularly to a pleated filter having excellent antistatic properties in peaks and valleys of pleats and a method for manufacturing the same.
従来より、空気中の塵埃を除去するためのフィルター基材として、不織布や紙等が用いられている。そして、フィルター基材には、帯電防止のために導電性を付与することが行われている（特許文献１）。これは、空気中の塵埃がフィルター基材と衝突及び摩擦して、フィルター基材が帯電し爆発の原因となるからである。特許文献１には、帯電防止のために、フィルター基材にグラファイトやカーボン等の導電性物質を含む溶液を、グラビア印刷法等により塗布し、導電性膜を形成することが記載されている。 Conventionally, a non-woven fabric, paper, or the like has been used as a filter base material for removing dust in the air. Then, the filter base material is imparted with conductivity in order to prevent static electricity (Patent Document 1). This is because the dust in the air collides with and rubs against the filter base material, and the filter base material is charged and causes an explosion. Patent Document 1 describes that a solution containing a conductive substance such as graphite or carbon is applied to a filter base material by a gravure printing method or the like to form a conductive film in order to prevent static electricity.
かかるフィルター基材は、種々の形態に加工してフィルターとして用いられているが、たとえば、折り畳み加工を施してプリーツフィルターとして用いる場合がある。しかるに、特許文献１記載のフィルター基材を、プリーツフィルターとして用いると、導電性が低下して、爆発の危険性が高まるということがあった。導電性が低下する理由は、折り畳み加工を施して生じた山部及び谷部において、導電性膜に亀裂、脱落又は破損が生じて、電荷が伝導しにくくなるからである。 Such a filter base material is processed into various forms and used as a filter, but for example, it may be folded and used as a pleated filter. However, when the filter base material described in Patent Document 1 is used as a pleated filter, the conductivity may decrease and the risk of explosion may increase. The reason why the conductivity is lowered is that the conductive film is cracked, dropped or broken in the peaks and valleys generated by the folding process, and it becomes difficult for the electric charge to be conducted.
本発明の課題は、フィルター基材に折り畳み加工を施して、プリーツフィルターの形態としたときでも、山部及び谷部において導電性が低下しにくくすることにある。 An object of the present invention is to make it difficult for the conductivity to decrease in the peaks and valleys even when the filter base material is folded to form a pleated filter.
本発明は、フィルター基材に特定の導電性ポリマーを密着させることにより、上記課題を解決したものである。すなわち、本発明は、不織布よりなるフィルター基材が折り畳まれてなるプリーツフィルターであって、該フィルター基材の少なくとも表面にピロール系重合体が形成されてなるプリーツフィルター及びその製造方法に関するものである。 The present invention solves the above-mentioned problems by adhering a specific conductive polymer to a filter base material. That is, the present invention relates to a pleated filter in which a filter base material made of a non-woven fabric is folded, and a pleated filter in which a pyrrole-based polymer is formed on at least the surface of the filter base material, and a method for producing the same. ..
本発明で用いるフィルター基材は、不織布よりなる。不織布としては、プリーツフィルターとして用いられている従来公知のものを使用しうる。たとえば、セルロース系繊維等を構成繊維とする乾式不織布、ビニロン繊維等を構成繊維とする湿式不織布又はポリアミド系長繊維やポリオレフィン系長繊維を構成繊維とするスパンボンド不織布を使用しうる。本発明においては、耐久性及び高強伸度等の観点から、ポリエステル系長繊維を構成繊維とするスパンボンド不織布を用いるのが好ましい。そして、このスパンボンド不織布の構成繊維としては、芯成分がポリエチレンテレフタレートで、鞘成分が該ポリエチレンテレフタレートの融点よりも低い融点を持つ共重合ポリエステルで形成されてなる芯鞘型複合長繊維が用いるのが好ましい。ここで、鞘成分とは、芯成分の周面が共重合ポリエステルで完全に囲繞されているものだけでなく、芯成分の周面に間隔を置いて軸方向に平行に配置された複数本の共重合ポリエステルからなるものも含んでいる。かかる芯鞘型複合長繊維は、鞘成分のみを軟化又は溶融させ長繊維相互間を圧着して融着することによって、比較的剛直なフィルター基材とすることができ、好ましいものである。 The filter base material used in the present invention is made of a non-woven fabric. As the non-woven fabric, a conventionally known non-woven fabric used as a pleated filter can be used. For example, a dry non-woven fabric having a cellulose-based fiber or the like as a constituent fiber, a wet nonwoven fabric having a vinylon fiber or the like as a constituent fiber, or a spunbonded nonwoven fabric having a polyamide-based long fiber or a polyolefin-based long fiber as a constituent fiber can be used. In the present invention, from the viewpoint of durability, high strength and elongation, etc., it is preferable to use a spunbonded nonwoven fabric containing polyester-based long fibers as constituent fibers. As the constituent fibers of this spunbonded nonwoven fabric, a core-sheath type composite long fiber having a core component made of polyethylene terephthalate and a sheath component made of a copolymerized polyester having a melting point lower than the melting point of the polyethylene terephthalate is used. Is preferable. Here, the sheath component is not only one in which the peripheral surface of the core component is completely surrounded by the copolymerized polyester, but also a plurality of pieces arranged in parallel in the axial direction at intervals on the peripheral surface of the core component. It also includes those made of copolymerized polyester. Such core-sheath type composite long fibers can be made into a relatively rigid filter base material by softening or melting only the sheath component and pressure-bonding the long fibers to each other, which is preferable.
芯鞘型複合長繊維相互間の融着は、不織布の全区域に亙っていてもよいし、部分的な区域であってもよい。不織布の全区域に亙って融着されているよりも、部分的な融着区域を持つ不織布の方が、通気性が低下しにくいので、フィルター基材として適している。部分的な融着区域の形状は任意であるが、一般的に、ストライプ状、円形状、楕円形状、長方形状又は菱形状であり、これらの融着区域が間隔を置いて全体に亙っている。融着区域の面積も任意であるが、一般的に、０．１～５．０ｍｍ2程度である。また、不織布全体における融着区域の面積率や密度も任意であるが、一般的に、面積率は５～３０％程度であって、融着区域の密度は１０～４０個／ｃｍ2程度である。 The fusion between the core-sheath type composite long fibers may extend over the entire area of the nonwoven fabric or may be a partial area. A non-woven fabric having a partially fused area is more suitable as a filter base material because the air permeability is less likely to decrease than the non-woven fabric being fused over the entire area of the non-woven fabric. The shape of the partial fusion zone is arbitrary, but is generally striped, circular, elliptical, rectangular or rhombic, and these fusion zones are spaced across the entire surface. There is. The area of the fusion zone is also arbitrary, but is generally about 0.1 to 5.0 mm 2 . The area ratio and density of the fused area in the entire nonwoven fabric are also arbitrary, but in general, the area ratio is about 5 to 30%, and the density of the fused area is about 10 to 40 pieces / cm 2 . be.
不織布の構成繊維の繊度は任意であるが、一般的に１～１０デシテックス程度である。また、不織布の目付及び厚さも任意であるが、一般的に、目付が１００～５００ｇ／ｍ2程度であり、厚さが０．１～２．０ｍｍ程度である。不織布は単層であるのが一般的であるが、高見掛け密度の不織布と低見掛け密度の不織布が積層された二層又は三層不織布であってもよい。さらには、不織布の片面に、ネット状の支持体や微孔膜等が貼付されていてもよい。 The fineness of the constituent fibers of the non-woven fabric is arbitrary, but is generally about 1 to 10 decitex. The basis weight and thickness of the nonwoven fabric are also arbitrary, but generally, the basis weight is about 100 to 500 g / m 2 and the thickness is about 0.1 to 2.0 mm. The non-woven fabric is generally a single layer, but it may be a two-layer or three-layer non-woven fabric in which a high apparent density non-woven fabric and a low apparent density non-woven fabric are laminated. Further, a net-like support, a micropore membrane, or the like may be attached to one side of the nonwoven fabric.
不織布よりなるフィルター基材の少なくとも表面には、ピロール系重合体が形成されてなる。すなわち、ピロール系重合体が、フィルター基材の少なくとも表面に存在する構成繊維表面で形成されている。もちろん、フィルター基材の内部に存在する構成繊維表面において、ピロール系重合体が形成されていてもよいことは、いうまでもない。ピロール系重合体は、多数のピロール環を持つ有機高分子化合物であり、電荷がピロール環を伝導して導電性を示すものである。具体的には、ピロール、３－メチルピロール、Ｎ－メチルピロール、３，５－ジメチルピロール、４－メチルピロール－３－カルボン酸メチル、３－エチルピロール又は３－オクチルピロールのピロール系モノマーを単独で又は混合し重合して得られたピロール系重合体が挙げられる。本発明においては、ピロール系重合体がフィルター基材である不織布の構成繊維表面で生成され、構成繊維と強固に密着又は結合しているので、その分子量は定かではないが、数千～数万程度であると推測している。 A pyrrole-based polymer is formed on at least the surface of a filter base material made of a non-woven fabric. That is, the pyrrole-based polymer is formed on the surface of the constituent fibers existing on at least the surface of the filter base material. Of course, it goes without saying that the pyrrole-based polymer may be formed on the surface of the constituent fibers existing inside the filter base material. The pyrrole-based polymer is an organic polymer compound having a large number of pyrrole rings, and an electric charge conducts the pyrrole ring to exhibit conductivity. Specifically, a pyrrole-based monomer such as pyrrole, 3-methylpyrrole, N-methylpyrrole, 3,5-dimethylpyrrole, 4-methylpyrrole-3-carboxylate methyl, 3-ethylpyrrole or 3-octylpyrrole is used alone. Examples thereof include pyrrole-based polymers obtained by mixing and polymerizing. In the present invention, since the pyrrole-based polymer is produced on the surface of the constituent fibers of the non-woven fabric which is the filter base material and is firmly adhered or bonded to the constituent fibers, its molecular weight is not certain, but it is several thousand to tens of thousands. I'm guessing it's about.
ピロール系重合体が構成繊維表面に形成されているフィルター基材は、折り畳むことにより、プリーツフィルターとなる。折り畳みピッチ（山部と谷部の長さ）は用途に応じて種々であり、任意の折り畳みピッチが採用される。なお、折り畳みは、フィルター基材の機械方向（不織布製造の際の搬送方向）と直交する方向に山部及び谷部が形成されるように行うのが、一般的である。 The filter base material on which the pyrrole-based polymer is formed on the surface of the constituent fibers becomes a pleated filter by folding. The folding pitch (length of the peak and the valley) varies depending on the application, and an arbitrary folding pitch is adopted. It should be noted that the folding is generally performed so that the peaks and valleys are formed in the direction orthogonal to the mechanical direction of the filter base material (the transport direction at the time of producing the nonwoven fabric).
本発明に係るプリーツフィルターの製造方法の一例としては、不織布をピロール系モノマーを含む溶液に浸漬し、該ピロール系モノマーを重合させて、該不織布の少なくとも表面にピロール系重合体を生成させて、フィルター基材を得た後、該フィルター基材を折り畳むという方法が挙げられる。ピロール系モノマーを含む溶液中には、重合触媒を含有させておくのが好ましい。重合触媒を含有させておけば、１０～３０℃程度の常温で重合反応が進行するからである。重合触媒としては、塩化第二鉄、硫酸第二鉄、硝酸第二鉄、過塩素酸第二鉄、ｐ－トルエンスルホン酸第二鉄又はベンゼンスルホン酸第二鉄等が用いられる。また、ピロール系モノマーを含む溶液中に、導電性を調整するため、重合触媒と共にドーパントを含有させておいてもよい。ドーパントとしては、ｐ－トルエンスルホン酸、トリフルオロメタンスルホン酸或いはドデシルベンゼンスルホン酸、又はそれらのナトリウム塩が用いられる。 As an example of the method for producing a pleated filter according to the present invention, a nonwoven fabric is immersed in a solution containing a pyrrole-based monomer, the pyrrole-based monomer is polymerized, and a pyrrole-based polymer is generated on at least the surface of the nonwoven fabric. After obtaining the filter base material, a method of folding the filter base material can be mentioned. It is preferable to contain a polymerization catalyst in the solution containing the pyrrole-based monomer. This is because if the polymerization catalyst is contained, the polymerization reaction proceeds at room temperature of about 10 to 30 ° C. As the polymerization catalyst, ferric chloride, ferric sulfate, ferric nitrate, ferric perchlorate, ferric p-toluenesulfonate, ferric benzenesulfonate and the like are used. Further, in order to adjust the conductivity, a dopant may be contained in the solution containing the pyrrole-based monomer together with the polymerization catalyst. As the dopant, p-toluenesulfonic acid, trifluoromethanesulfonic acid or dodecylbenzenesulfonic acid, or a sodium salt thereof is used.
不織布をピロール系モノマーを含む溶液に浸漬する際、不織布１００質量部に対して、ピロール系モノマーが０．０５～５質量部程度供給できる量であればばよい。重合触媒を用いる場合、重合触媒はピロール系モノマー１モルに対して、１～３モル程度使用するのが好ましい。さらに、ドーパントを併用する場合、ドーパントの含有量は液のｐＨが１～３程度となる量であるのが好ましい。 When the nonwoven fabric is immersed in a solution containing a pyrrole-based monomer, the amount may be such that the pyrrole-based monomer can be supplied in an amount of about 0.05 to 5 parts by mass with respect to 100 parts by mass of the nonwoven fabric. When a polymerization catalyst is used, it is preferable to use about 1 to 3 mol of the polymerization catalyst with respect to 1 mol of the pyrrole-based monomer. Further, when a dopant is used in combination, the content of the dopant is preferably an amount such that the pH of the liquid is about 1 to 3.
不織布の構成繊維として、芯成分がポリエチレンテレフタレートで、鞘成分がポリエチレンテレフタレートの融点よりも低い融点を持つ共重合ポリエステルで形成されてなる芯鞘型複合長繊維を用いる場合、従来公知のスパンボンド法で不織布を製造するのが合理的である。すなわち、ポリエチレンテレフタレートと共重合ポリエステルを複合溶融紡糸装置に供給し、芯成分がポリエチレンテレフタレートで鞘成分が共重合ポリエステルで形成されてなる芯鞘型複合長繊維を複合溶融紡糸すると共に、コンベアに集積して繊維ウェブを得る。得られた繊維ウェブを、加熱された凹凸ロールと平滑ロールの間、加熱された凹凸ロール間又は加熱された平滑ロール間に通して、加熱及び加圧を施し、鞘成分を軟化又は溶融させて、芯鞘型複合長繊維相互間を融着して不織布を得るのが好ましい。加熱された凹凸ロールと平滑ロール又は加熱された凹凸ロール間に繊維ウェブを通すと、得られる不織布は、部分的な融着区域を持つものとなる。凹凸ロールの凸部の形状により、種々の融着区域を持つ不織布が得られる。 When a core-sheath type composite long fiber made of a copolymerized polyester having a core component of polyethylene terephthalate and a sheath component of a melting point lower than the melting point of polyethylene terephthalate is used as the constituent fiber of the non-woven fabric, a conventionally known spunbond method is used. It is rational to manufacture non-woven fabrics with. That is, polyethylene terephthalate and copolymerized polyester are supplied to the composite melt-spinning apparatus, and core-sheath type composite long fibers having a core component of polyethylene terephthalate and a sheath component of copolymerized polyester are composite melt-spun and accumulated on a conveyor. And get a fiber web. The obtained fiber web is passed between heated uneven rolls and smooth rolls, between heated uneven rolls or between heated smooth rolls, and heated and pressurized to soften or melt the sheath component. , It is preferable to obtain a non-woven fabric by fusing between core-sheath type composite long fibers. When the fiber web is passed between the heated concavo-convex roll and the smooth roll or the heated concavo-convex roll, the resulting nonwoven fabric will have a partial fusion zone. Depending on the shape of the convex portion of the concave-convex roll, a non-woven fabric having various fusion zones can be obtained.
不織布に、従来公知のコロナ処理又はプラズマ処理を施しておくのが好ましい。コロナ処理又はプラズマ処理は、空気等のガス中で放電し、ガスを構成する分子を励起させ或いはイオン化させて、不織布の構成繊維表面に官能基を導入するなどにより、構成繊維表面を改質処理するものである。これにより、不織布の構成繊維表面に、ピロール系重合体が結合しやすくなり、又は密着しやすくなるのである。 It is preferable that the nonwoven fabric is subjected to a conventionally known corona treatment or plasma treatment. In the corona treatment or plasma treatment, the surface of the constituent fibers is modified by discharging in a gas such as air to excite or ionize the molecules constituting the gas and introducing a functional group onto the surface of the constituent fibers of the non-woven fabric. It is something to do. This makes it easier for the pyrrole-based polymer to bond or adhere to the surface of the constituent fibers of the nonwoven fabric.
不織布の構成繊維表面にピロール系重合体を形成させたフィルター基材は、任意の折り畳みピッチで折り畳まれてプリーツフィルターが製造される。なお、この折り畳みは従来公知のプリーツ加工機を用いて行えばよい。 A pleated filter is manufactured by folding a filter base material having a pyrrole-based polymer formed on the surface of constituent fibers of a non-woven fabric at an arbitrary folding pitch. It should be noted that this folding may be performed using a conventionally known pleating machine.
本発明に係るプリーツフィルターは、円筒状にして集塵機等のカートリッジフィルター、放電加工機等の液体フィルター又は自動車のエンジン用フィルター等に用いられる。また、方形の枠に収納して、空調機の吸気用フィルター等に用いられる。 The pleated filter according to the present invention has a cylindrical shape and is used as a cartridge filter such as a dust collector, a liquid filter such as an electric discharge machine, or a filter for an automobile engine. In addition, it is housed in a square frame and used as an intake filter for an air conditioner.
本発明に係るプリーツフィルターは、不織布の構成繊維表面にピロール系重合体が生成し形成されたフィルター基材を折り畳んでなるものである。ピロール系重合体は、導電性有機高分子化合物であって、不織布の構成繊維と結合し或いは密着して形成されているので、折り畳んだ山部及び谷部においても、亀裂、脱落及び破損が生じにくい。したがって、山部及び谷部において導電性能の低下が少ない、プリーツフィルターを提供しうるという効果を奏する。 The pleated filter according to the present invention is formed by folding a filter base material formed by forming a pyrrole-based polymer on the surface of constituent fibers of a non-woven fabric. Since the pyrrole-based polymer is a conductive organic polymer compound and is formed in close contact with or in close contact with the constituent fibers of the non-woven fabric, cracks, shedding and breakage occur even in the folded peaks and valleys. Hateful. Therefore, it is possible to provide a pleated filter with little deterioration in conductivity in the peaks and valleys.
実施例
芯成分として、融点２５６℃のポリエチレンテレフタレートを準備した。一方、鞘成分として、融点２３０℃の共重合ポリエステル（イソフタル酸を８モル％共重合したもの）を準備した。この芯成分と鞘成分を、芯成分：鞘成分＝６：４（質量比）となるように複合溶融紡糸装置に供給し、紡糸温度２９０℃で複合溶融紡糸を行った。複合溶融紡糸により紡出した長繊維群を、エアーサッカーにより４３００ｍ／分の速度で牽引した後開繊させ、移動する捕集コンベア上に長繊維群を集積させて繊維ウェブを得た。
Example Polyethylene terephthalate having a melting point of 256 ° C. was prepared as a core component. On the other hand, as a sheath component, a copolymerized polyester having a melting point of 230 ° C. (copolymerized with 8 mol% of isophthalic acid) was prepared. The core component and the sheath component were supplied to the composite melt spinning apparatus so that the core component: sheath component = 6: 4 (mass ratio), and the composite melt spinning was performed at a spinning temperature of 290 ° C. The long fiber group spun by composite melt spinning was towed at a speed of 4300 m / min by air soccer and then opened, and the long fiber group was accumulated on a moving collection conveyor to obtain a fiber web.
得られた繊維ウェブを、表面温度２１０℃に加熱された凹凸ロールと表面温度２１０℃に加熱された平滑ロールの間に通して、線圧５９０Ｎ／ｃｍで加圧して不織布を得た。凹凸ロールの凸部は、２５個／ｃｍ2の密度で配されており、凸部先端の面積は０．５ｍｍ2であって、凸部先端の面積率は１３％であった。得られた不織布は、目付が２６０ｇ／ｍ2で、約０．５ｍｍ2の面積の融着区域が間隔を置いて均一に配置され、剛直なものであった。また、得られた不織布から採取した芯鞘型複合長繊維の繊度は、２．７デシテックスであった。 The obtained fiber web was passed between an uneven roll heated to a surface temperature of 210 ° C. and a smooth roll heated to a surface temperature of 210 ° C., and pressed at a linear pressure of 590 N / cm to obtain a nonwoven fabric. The convex portions of the concave-convex roll were arranged at a density of 25 pieces / cm 2 , the area of the convex portion tip was 0.5 mm 2 , and the area ratio of the convex portion tip was 13%. The obtained non-woven fabric had a basis weight of 260 g / m 2 , and fused areas having an area of about 0.5 mm 2 were uniformly arranged at intervals and were rigid. The fineness of the core-sheath type composite long fiber collected from the obtained non-woven fabric was 2.7 decitex.
常温の水中に、不織布１００質量部に対して４質量部のピロールモノマーを投入すると共に、ピロールモノマー１モルに対して２．３モルの塩化第二鉄及び１５モルのｐ－トルエンスルホン酸を投入し、不織布をピロールモノマー等を含む水溶液に浸漬した。その後、３時間攪拌しながらピロールモノマーの重合を進行させ、芯鞘型複合長繊維表面にポリピロールを生成させ、フィルター基材を得た。なお、ポリピロールを生成させたことにより、フィルター基材表面は濃灰色に着色された。 In water at room temperature, 4 parts by mass of pyrrol monomer is added to 100 parts by mass of the non-woven fabric, and 2.3 mol of ferric chloride and 15 mol of p-toluenesulfonic acid are added to 1 mol of pyrrol monomer. Then, the non-woven fabric was immersed in an aqueous solution containing pyrrol monomer and the like. Then, the polymerization of the pyrrole monomer was allowed to proceed with stirring for 3 hours to generate polypyrrole on the surface of the core-sheath type composite long fiber to obtain a filter base material. By producing polypyrrole, the surface of the filter base material was colored dark gray.
得られたフィルター基材を、プリーツ加工機を用いて、折り畳みピッチ１５ｍｍで折り畳んでプリーツフィルターを得た。 The obtained filter base material was folded at a folding pitch of 15 mm using a pleating machine to obtain a pleated filter.
比較例
カーボンブラック及び水溶性エポキシを含有する導電性塗料（固形分：２０質量％）を準備した。この導電性塗料を、実施例で得られた不織布の片面にグラビアロールを用いて塗布した後、１５０℃のオーブン中で、水分を蒸発させると共に水溶性エポキシを硬化させて不織布表面にカーボンブラックが付着したフィルター基材を得た。なお、フィルター基材の目付は約２８０ｇ／ｍ2であった。このフィルター基材を用いて、実施例と同様にして折り畳みプリーツフィルターを得た。
Comparative Example A conductive paint (solid content: 20% by mass) containing carbon black and a water-soluble epoxy was prepared. After applying this conductive paint to one side of the non-woven fabric obtained in the example using a gravure roll, water is evaporated and the water-soluble epoxy is cured in an oven at 150 ° C. to form carbon black on the surface of the non-woven fabric. An attached filter substrate was obtained. The basis weight of the filter base material was about 280 g / m 2 . Using this filter substrate, a foldable pleated filter was obtained in the same manner as in Examples.
［性能評価］
（１）通気度（ｃｍ3／ｃｍ2／秒）
不織布の通気度とフィルター基材の通気度を、以下の方法で測定した。まず、不織布及びフィルター基材の各々から、タテ１５ｃｍ×ヨコ１５ｃｍの試験片を任意に１０枚採取した。そして、ＪＩＳ－Ｌ－１０９６に準じ、フラジール形試験機を用い、円筒の一端に試験片を取り付けた後、加減抵抗器によって吸い込みファンを調整し、傾斜形気圧計が水柱１．２７ｃｍを示すように空気を吸い込ませ、そのときの垂直気圧計の示す圧力と、使用した空気孔の種類とから、試験機に付属する表によって、試験片を通過する空気量を求め、その数値の平均値を通気度とした。
この結果、不織布の通気度は１０．１ｃｍ3／ｃｍ2／秒であり、実施例に係るフィルター基材の通気度は９．６０ｃｍ3／ｃｍ2／秒であり、比較例に係るフィルター基材の通気度は５．８４ｃｍ3／ｃｍ2／秒であった。このことから、不織布の構成繊維表面にポリピロールを生成形成させた実施例に係るフィルター基材は、通気度の低下が少なく、フィルター性能の低下が少ないことが分かる。一方、不織布に接着剤を用いてカーボンブラックを付着させた比較例に係るフィルター基材は、通気度が低下し、フィルター性能の低下が著しいことが分かる。
[Performance evaluation]
(1) Air permeability (cm 3 / cm 2 / sec)
The air permeability of the non-woven fabric and the air permeability of the filter base material were measured by the following methods. First, 10 test pieces of 15 cm in length × 15 cm in width were arbitrarily collected from each of the non-woven fabric and the filter base material. Then, according to JIS-L-1096, use a Frazier type tester, attach a test piece to one end of the cylinder, adjust the suction fan with an adjustment resistor, and make the inclined barometer show 1.27 cm of water column. From the pressure indicated by the vertical barometer at that time and the type of air holes used, determine the amount of air passing through the test piece from the table attached to the tester, and calculate the average value of the values. The degree of ventilation was set.
As a result, the air permeability of the nonwoven fabric was 10.1 cm 3 / cm 2 / sec, and the air permeability of the filter base material according to the example was 9.60 cm 3 / cm 2 / sec, and the filter base material according to the comparative example. The air permeability was 5.84 cm 3 / cm 2 / sec. From this, it can be seen that the filter base material according to the embodiment in which polypyrrole is formed and formed on the surface of the constituent fibers of the non-woven fabric has a small decrease in air permeability and a small decrease in filter performance. On the other hand, it can be seen that the filter base material according to the comparative example in which carbon black is adhered to the non-woven fabric using an adhesive has a reduced air permeability and a significant decrease in filter performance.
（２）表面抵抗率（Ω／□）
実施例及び比較例に係るプリーツフィルターの山部の表面抵抗率を、ＳＩＭＣＯ ＪＡＰＡＮ製の表面抵抗計ＳＴ－４を用いて測定した。測定は２０℃×２５％ＲＨの雰囲気下で行い、測定電圧は１０Ｖとした。なお、プリーツフィルターの山部の表面抵抗率は、山部のみに表面抵抗計ＳＴ－４の両電極を接触させて測定し、これを３回行い、この平均値を表面抵抗率（Ω／□）とした。
この結果、実施例に係るプリーツフィルターの山部の表面抵抗率は３．８×１０5Ω／□以上であり、比較例に係るプリーツフィルターの山部の表面抵抗率は３．９×１０6Ω／□以上であり、実施例に係るプリーツフィルターの山部の表面抵抗率は、比較例に係るものに比べて、一桁優れていた。
(2) Surface resistivity (Ω / □)
The surface resistivity of the mountain portion of the pleated filter according to the examples and the comparative examples was measured using a surface resistance tester ST-4 manufactured by SIMCO JAPAN. The measurement was performed in an atmosphere of 20 ° C. × 25% RH, and the measured voltage was 10 V. The surface resistivity of the mountain part of the pleated filter is measured by contacting both electrodes of the surface resistivity meter ST-4 only on the mountain part, and this is performed three times, and the average value is the surface resistivity (Ω / □). ).
As a result, the surface resistivity of the mountain portion of the pleated filter according to the example is 3.8 × 10 5 Ω / □ or more, and the surface resistivity of the mountain portion of the pleated filter according to the comparative example is 3.9 × 10 6 It was Ω / □ or more, and the surface resistivity of the mountain portion of the pleated filter according to the example was an order of magnitude superior to that according to the comparative example.
（３）導電性物質の密着性
実施例及び比較例に係るプリーツフィルターの山部を、紙ワイパー（日本製紙クレシア株式会社製の「キムワイプ（登録商標）」）で３回擦り、紙ワイパーの表面に色付きが見られるか否かを確認した。この結果、実施例に係るプリーツフィルターは色付きが見られず、比較例に係るプリーツフィルターは色付きが見られた。
紙ワイパーで３回擦った後に、上記（２）の方法で表面抵抗率を測定した。実施例に係るプリーツフィルターの山部の表面抵抗率は、５．２×１０6Ω／□であり、比較例に係るプリーツフィルターの山部の表面抵抗率は測定上限（１０13Ω／□）を超えていた。なお、紙ワイパーで３回擦った後の山部の表面抵抗率は異常値が検出されたため、その異常値は除いた。
以上の結果から、実施例に係るプリーツフィルターは、比較例に係るものに比べて、山部において導電性物質が脱落しにくくなっていることが分かる。
(3) Adhesion of conductive substance The mountain portion of the pleated filter according to the examples and comparative examples was rubbed three times with a paper wiper (“Kim Wipe (registered trademark)” manufactured by Nippon Paper Crecia Co., Ltd.), and the surface of the paper wiper. It was confirmed whether or not coloring was seen in. As a result, the pleated filter according to the example was not colored, and the pleated filter according to the comparative example was colored.
After rubbing with a paper wiper three times, the surface resistivity was measured by the method (2) above. The surface resistivity of the mountain portion of the pleated filter according to the embodiment is 5.2 × 10 6 Ω / □, and the surface resistivity of the mountain portion of the pleated filter according to the comparative example is the upper limit of measurement (10 13 Ω / □). Was over. Since an abnormal value was detected in the surface resistivity of the mountain portion after rubbing with a paper wiper three times, the abnormal value was excluded.
From the above results, it can be seen that in the pleated filter according to the example, the conductive substance is less likely to fall off in the mountain portion than in the pleated filter according to the comparative example.
Claims (10)
前記繊維ウェブに加熱及び加圧を施し、鞘成分を軟化又は溶融させて、前記芯鞘型複合長繊維相互間を融着し、不織布を得る工程及び
前記不織布をピロール系モノマーを含む溶液に浸漬し、該ピロール系モノマーを重合させて、前記不織布の少なくとも表面にピロール系重合体を生成させる工程を具える請求項５記載のフィルター基材の製造方法。 A step of accumulating core-sheath type composite long fibers formed of a copolymerized polyester having a core component of polyethylene terephthalate and a sheath component having a melting point lower than the melting point of the polyethylene terephthalate to obtain a fiber web.
A step of heating and pressurizing the fiber web to soften or melt the sheath component to fuse the core-sheath type composite long fibers with each other to obtain a non-woven fabric, and immersing the non-woven fabric in a solution containing a pyrrol-based monomer. The method for producing a filter base material according to claim 5, further comprising a step of polymerizing the pyrrole-based monomer to form a pyrrol-based polymer on at least the surface of the nonwoven fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020191159A JP2022080150A (en) | 2020-11-17 | 2020-11-17 | Pleat filter and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020191159A JP2022080150A (en) | 2020-11-17 | 2020-11-17 | Pleat filter and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2022080150A true JP2022080150A (en) | 2022-05-27 |
Family
ID=81731693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2020191159A Pending JP2022080150A (en) | 2020-11-17 | 2020-11-17 | Pleat filter and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2022080150A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023002888A1 (en) | 2021-07-21 | 2023-01-26 | セイコーグループ株式会社 | Electric wave transmission device and wireless communication system |
-
2020
- 2020-11-17 JP JP2020191159A patent/JP2022080150A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023002888A1 (en) | 2021-07-21 | 2023-01-26 | セイコーグループ株式会社 | Electric wave transmission device and wireless communication system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101687426B1 (en) | Filtration material for filters, and filter cartridge | |
| CN103458987B (en) | Filtering medium for filter, and water filtering apparatus provided with filtering medium | |
| KR101441593B1 (en) | Nonwoven fabric for filters and process for production of the same | |
| CN102596534B (en) | Multilayered composite | |
| JP4979407B2 (en) | Multilayer sheet and manufacturing method thereof | |
| JP2022080150A (en) | Pleat filter and manufacturing method thereof | |
| WO2018079635A1 (en) | Spunbond nonwoven fabric and method for manufacturing same | |
| KR20110047340A (en) | Preparation Method of Composite Yarn including Nanofibers | |
| WO2019058292A1 (en) | Nano-fiber based filter media and methods of preparation thereof | |
| CN112261982B (en) | Spunbonded nonwoven fabric for filter and manufacturing method thereof | |
| JP2006069141A (en) | Composite fiber structure and its manufacturing method | |
| US20210362101A1 (en) | Filter material | |
| JP2017127832A (en) | Nonwoven fabric for filters | |
| KR19990088099A (en) | Filtering medium | |
| KR0126822B1 (en) | Heat-resistant nonwoven fabic and method of manufacturing said fabric | |
| JP4890049B2 (en) | Extra fine fiber assembly | |
| CN106552458A (en) | A kind of conducting filtration material and its production method and purposes | |
| JP2004181341A (en) | Wet nonwoven fabric for filter and polyester binder fiber for use therein | |
| US8465564B2 (en) | Filter medium | |
| JP2006069142A (en) | Composite fiber structure and its manufacturing method | |
| JP2513467B2 (en) | Polyolefin-based wet non-woven fabric | |
| JP2022062030A (en) | Fine fibers made from room temperature crosslinking | |
| JP2013544975A (en) | High uniformity spunbond nonwoven | |
| JP4326298B2 (en) | Nonwoven fabric for filter and method for producing the same | |
| JP3716969B2 (en) | Charged non-woven fabric |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20231026 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20240627 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20240701 |