JPH0557116A - Heat-resistant filter material - Google Patents
Heat-resistant filter materialInfo
- Publication number
- JPH0557116A JPH0557116A JP22070291A JP22070291A JPH0557116A JP H0557116 A JPH0557116 A JP H0557116A JP 22070291 A JP22070291 A JP 22070291A JP 22070291 A JP22070291 A JP 22070291A JP H0557116 A JPH0557116 A JP H0557116A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- dust
- resistant
- surface layer
- fiber
- 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
- 239000000463 material Substances 0.000 title abstract description 8
- 239000000835 fiber Substances 0.000 claims abstract description 31
- 239000002344 surface layer Substances 0.000 claims abstract description 28
- 239000004642 Polyimide Substances 0.000 claims abstract description 21
- 125000003118 aryl group Chemical group 0.000 claims abstract description 21
- 229920001721 polyimide Polymers 0.000 claims abstract description 21
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 16
- 239000012210 heat-resistant fiber Substances 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 37
- 238000005299 abrasion Methods 0.000 abstract description 5
- 230000035699 permeability Effects 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 description 7
- 229920006015 heat resistant resin Polymers 0.000 description 7
- 239000004760 aramid Substances 0.000 description 6
- 229920003235 aromatic polyamide Polymers 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- JXCHMDATRWUOAP-UHFFFAOYSA-N diisocyanatomethylbenzene Chemical compound O=C=NC(N=C=O)C1=CC=CC=C1 JXCHMDATRWUOAP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- -1 polyphenylene sulphite Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- UITKHKNFVCYWNG-UHFFFAOYSA-N 4-(3,4-dicarboxybenzoyl)phthalic acid Chemical compound C1=C(C(O)=O)C(C(=O)O)=CC=C1C(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 UITKHKNFVCYWNG-UHFFFAOYSA-N 0.000 description 1
- VQVIHDPBMFABCQ-UHFFFAOYSA-N 5-(1,3-dioxo-2-benzofuran-5-carbonyl)-2-benzofuran-1,3-dione Chemical compound C1=C2C(=O)OC(=O)C2=CC(C(C=2C=C3C(=O)OC(=O)C3=CC=2)=O)=C1 VQVIHDPBMFABCQ-UHFFFAOYSA-N 0.000 description 1
- 239000004936 P-84 Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920006303 teflon fiber Polymers 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Landscapes
- Filtering Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、耐熱性濾材に係り、特
に、高温ガス中の微細粉塵を捕集する耐熱性濾材に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-resistant filter medium, and more particularly to a heat-resistant filter medium for collecting fine dust in high temperature gas.
【０００２】[0002]
【従来の技術】従来、高温ガス中の微細粉塵（以下、
『ダスト』という）を捕集する耐熱性濾材は、メタ芳香
族ポリアミド繊維、ポリフェニレンサルファイト（ＰＰ
Ｓ）繊維、テフロンの多孔質膜、ガラス繊維、テフロン
繊維などの単独素材からなる織物やフェルト、または、
前記素材の組合せからなる織物やフェルトが使用されて
いた。そして、近年、前記耐熱性濾材の濾過能率向上の
要求から、織物タイプの耐熱性濾材より空隙率が大き
く、圧力損失の低いフェルトタイプの耐熱性濾材が、そ
の需要を伸ばしている。2. Description of the Related Art Conventionally, fine dust in high temperature gas (hereinafter,
The heat-resistant filter medium that collects "dust" is meta-aromatic polyamide fiber, polyphenylene sulphite (PP
S) Fabrics or felts made of a single material such as fibers, Teflon porous membrane, glass fibers, Teflon fibers, or
Woven fabrics and felts made from combinations of the above materials have been used. In recent years, due to the demand for improvement in the filtration efficiency of the heat-resistant filter medium, the demand for the felt-type heat-resistant filter medium having a higher porosity and a lower pressure loss than the woven type heat-resistant filter medium has been increasing.
【０００３】しかしながら、前記フェルトタイプの耐熱
性濾材は、その表面濾過面を構成する繊維の繊維間空隙
が大きく、また、毛羽立ち易いため、濾過時にダストが
濾材内部に入り混み易く、ダストの払い落とし効果（ダ
スト剥離性）に難点があった。従って、濾材が目詰まり
し易く、経時的に圧力損失が高くなるという問題があっ
た。However, since the felt-type heat-resistant filter medium has large inter-fiber voids of the fibers constituting the surface filtration surface and is easily fluffed, dust easily enters the filter medium during filtration, and dust is wiped off. There was a difficulty in the effect (dust releasability). Therefore, there is a problem that the filter medium is easily clogged and the pressure loss increases with time.
【０００４】そこで、このような問題を解決するため、
濾材を構成するフェルト体表面の毛羽を毛焼処理した
り、表面に耐熱性樹脂を含浸させたり、耐熱性樹脂をコ
ーティングするなどして、ダストが前記濾材の内部に侵
入することを防止する従来例が知られている。また、合
成繊維からなるフェルト体の表面に四フッ化エチレン樹
脂（ＰＴＦＥ）フィルムを延伸して得られる微小な細孔
を有する薄膜（メンブレン）をラミネートした濾材が提
供されている。Therefore, in order to solve such a problem,
Conventionally, dust is prevented from entering the inside of the filter medium by fluffing the fluff on the surface of the felt constituting the filter medium, impregnating the surface with a heat-resistant resin, or coating a heat-resistant resin. Examples are known. Further, there is provided a filter medium in which a thin film (membrane) having fine pores obtained by stretching a tetrafluoroethylene resin (PTFE) film is laminated on the surface of a felt body made of synthetic fiber.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前記従
来例のように、前記フェルト体表面の毛羽を毛焼処理す
るだけでは、ダストが濾材内部に侵入することを阻止す
ることは困難であった。また、前記フェルト体の表面に
耐熱性樹脂を含浸またはコーティングする従来例は、当
該樹脂の含浸，脱液、あるいはコーティング，乾燥など
の工程を必要とし、生産性が著しく低下するという問題
があった。そして、当該耐熱性樹脂を溶解させる溶剤に
は、毒性のあるものが多く、作業環境が悪化するなどの
問題もあった。さらに、前記フェルト体を構成する耐熱
性樹脂のグレードに見合う耐熱性樹脂は、高価であるた
め、コストがかかるという問題もあった。そして特に、
耐熱性樹脂をコーティングする従来例は、前記フェルト
体の表面に十分な空隙率を付与することができないた
め、フェルト体の圧力損失が高くなるという問題があっ
た。However, it is difficult to prevent the dust from entering the inside of the filter medium only by fluffing the fluff on the surface of the felt body as in the conventional example. Further, the conventional example in which the surface of the felt body is impregnated or coated with a heat-resistant resin requires steps such as impregnation of the resin, deliquoring, coating, and drying, which causes a problem that productivity is significantly reduced. .. Many of the solvents that dissolve the heat-resistant resin are toxic, and there is a problem that the working environment deteriorates. Further, there is a problem in that the heat-resistant resin commensurate with the grade of the heat-resistant resin constituting the felt body is expensive and therefore costly. And especially
The conventional example of coating with a heat-resistant resin has a problem that the pressure loss of the felt body increases because it is not possible to give a sufficient porosity to the surface of the felt body.
【０００６】また、前記フェルト体の表面にＰＴＦＥフ
ィルムを延伸してラミネートする従来例は、ダストの払
い落とし効果が良好となる反面、生産性が低下し、コス
トがかかる上に、ＰＴＦＥの薄膜の耐久性が十分といえ
ない等の問題があった。本発明は、このような問題を解
決することを課題とするものであり、極めて良好なダス
ト捕集性，耐熱性，難燃性，強度，耐摩耗性及び透過性
を有し、且つ、ダスト払い落とし性能に優れた長寿命な
耐熱性濾材を提供することを目的とする。Further, in the conventional example in which a PTFE film is stretched and laminated on the surface of the felt body, the dust removing effect is good, but the productivity is lowered, the cost is high, and a thin PTFE film is used. There was a problem such as insufficient durability. The present invention has an object to solve such a problem, and has extremely good dust collecting property, heat resistance, flame retardancy, strength, abrasion resistance and permeability, and dust. It is an object of the present invention to provide a long-life heat-resistant filter material that has excellent cleaning performance.
【０００７】[0007]
【課題を解決するための手段】この目的を達成するた
め、本発明は、耐熱性繊維からなる不織布体の片側表面
に、芳香族ポリイミド繊維からなるウエッブを積層して
表面層とし、ニードリングにより絡合してフェルト体を
形成し、当該フェルト体の表面層に熱と圧を加えて当該
芳香族ポリイミド繊維を収縮させ、高密度化したことを
特徴とする耐熱性濾材を提供するものである。In order to achieve this object, the present invention provides a surface layer by laminating a web made of aromatic polyimide fiber on one surface of a nonwoven fabric made of heat resistant fiber, and by needling. The present invention provides a heat-resistant filter medium characterized by entanglement to form a felt body, and applying heat and pressure to the surface layer of the felt body to shrink the aromatic polyimide fiber and densify it. ..
【０００８】[0008]
【作用】芳香族ポリイミド繊維は、その断面形状が異形
であり、融点を持たず、耐熱性及び耐摩耗性に極めて優
れている。また、４５０℃で炭化分解が始まり、難燃性
能もＬＩＯ値（限界酸素指数）が３７と極めて良好であ
る。さらに、ガラス転移点（３１５℃）以上の温度で高
収縮し硬化する。また、ガラス転移点以下の２６０℃を
越える温度条件で、芳香族ポリイミド繊維に圧力を加え
ると、面積収縮なしに高密度化する。さらに、芳香族ポ
リイミド繊維は、不規則な不斉断面形状を有しており、
ガラス転移点以下の温度条件下で熱圧処理すると、熱融
着を伴わずに断面が偏平化して高密度化すると共に、表
面を平滑にする。そして、前記熱圧処理を停止しても、
前記高密度化した形状を保持し、同一太さの円形断面繊
維に比べて表面積を大きくとることができる。従って、
このような特性を有する芳香族ポリイミド繊維からなる
ウエッブを前記フェルト体の表面層とし、これに熱と圧
を加えることで、耐熱性，難燃性，耐摩耗性及び強度を
付与すると共に、前記表面層の表面積を増大させ、表面
層の細孔の微小化及び平滑化を達成し、ダストの捕集力
を向上し、さらに、ダストが濾材内部に侵入することを
防ぎ、ダストの剥離性を向上することができる。The aromatic polyimide fiber has an irregular cross-sectional shape, has no melting point, and is extremely excellent in heat resistance and abrasion resistance. Further, carbonization decomposition starts at 450 ° C., and the flame retardancy is also very good with an LIO value (limit oxygen index) of 37. Further, it highly shrinks and hardens at a temperature of the glass transition point (315 ° C.) or higher. Further, when pressure is applied to the aromatic polyimide fiber under a temperature condition of 260 ° C. or lower, which is lower than the glass transition point, the density is increased without area shrinkage. Furthermore, the aromatic polyimide fiber has an irregular asymmetric cross-sectional shape,
When heat and pressure treatment is carried out under a temperature condition below the glass transition point, the cross section is flattened and densified without heat fusion, and the surface is smoothed. And, even if the heat and pressure treatment is stopped,
The densified shape can be maintained and the surface area can be made larger than that of the circular cross-section fiber having the same thickness. Therefore,
A web made of an aromatic polyimide fiber having such characteristics is used as a surface layer of the felt body, and heat and pressure are applied to the web to impart heat resistance, flame retardancy, abrasion resistance and strength, and The surface area of the surface layer is increased, the pores of the surface layer are miniaturized and smoothed, the dust collecting power is improved, and the dust is prevented from invading the inside of the filter medium to improve the dust releasability. Can be improved.
【０００９】一方、前記耐熱性繊維からなる不織布体
は、前記熱圧処理を施しても高密度化することがない。
従って、ダストが目詰まりしにくく、寿命を向上するこ
とができる。さらに、この不織布体の存在により、濾材
の強度をさらに向上することができる。前記表面層は、
その表面積及び密度をできるだけ大きくし、微細空隙と
する必要があるため、芳香族ポリイミド繊維の太さ
（径）をなるべく細くすることが望まれる。これより、
芳香族ポリイミド繊維の太さは、１〜３ｄ程度とするこ
とが好ましい。また、前記表面層が厚すぎると、圧力損
失が大きくなり、処理能力が低下すると共に、硬くなっ
て柔軟性が失われる。従って、前記表面層を構成するウ
エッブは、５０〜２００ｇ／ｍ2 、さらに好ましくは、
８０〜１２０ｇ／ｍ2 とすることが好適である。On the other hand, the non-woven fabric made of the heat-resistant fiber does not have a high density even if it is subjected to the hot pressing treatment.
Therefore, dust is unlikely to be clogged and the life can be improved. Further, the presence of this non-woven fabric can further improve the strength of the filter medium. The surface layer is
Since it is necessary to make the surface area and density as large as possible to form fine voids, it is desirable to make the thickness (diameter) of the aromatic polyimide fiber as thin as possible. Than this,
The thickness of the aromatic polyimide fiber is preferably about 1 to 3d. On the other hand, if the surface layer is too thick, the pressure loss becomes large, the processing capacity is lowered, and the surface layer becomes hard and loses flexibility. Therefore, the web constituting the surface layer has a thickness of 50 to 200 g / m 2 , more preferably,
It is preferably 80 to 120 g / m 2 .
【００１０】また、前記耐熱性繊維からなる不織布体
は、目詰まり防止のため、その表面積及び密度を前記表
面層より小さくすることが望まれる。このため、当該不
織布体を構成する耐熱性繊維の太さは、３〜１０ｄ程度
とすることが好ましい。前記フェルト体の表面層に加え
る熱と圧は、当該表面層の芳香族ポリイミド繊維の高密
度化と、前記不織布体の耐熱性繊維の収縮を防止する目
的から、温度を２５０℃以上、３００℃以下、圧力を１
０ｋｇ／ｃｍ2 以上とすることが好適である。そして、
前記表面層の芳香族ポリイミド繊維の高密度化と、前記
不織布体の耐熱性繊維の収縮を防止可能であれば、前記
温度と圧力及び処理時間は、濾材の使用条件などにより
決定することができる。Further, it is desired that the non-woven fabric made of the heat resistant fiber has a surface area and a density smaller than that of the surface layer in order to prevent clogging. For this reason, it is preferable that the thickness of the heat resistant fiber constituting the non-woven fabric is about 3 to 10 d. The heat and pressure applied to the surface layer of the felt body are set to a temperature of 250 ° C. or higher and 300 ° C. for the purpose of increasing the density of the aromatic polyimide fibers in the surface layer and preventing the heat-resistant fibers of the nonwoven fabric body from shrinking. Below, pressure 1
It is preferably 0 kg / cm 2 or more. And
If the density of the aromatic polyimide fibers of the surface layer and the shrinkage of the heat resistant fibers of the non-woven fabric can be prevented, the temperature, the pressure and the treatment time can be determined by the use conditions of the filter medium and the like. ..
【００１１】[0011]
【実施例】次に、本発明の実施例について、図面を参照
して説明する。図１は、本実施例に係る濾材の製造工程
を示す断面図である。図１（１）に示す工程では、耐熱
性繊維として、芳香族ポリアミドを用い、これを平織に
した基布２（７６ｇ／ｍ2 ）の両面に、各々、太さ＝５
ｄ、長さ＝７６ｍｍの芳香族ポリアミド繊維からなるウ
エッブ層１を積層し、これをニードリングして耐熱性繊
維からなる不織布体３を形成する。Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a manufacturing process of a filter medium according to this example. In the step shown in FIG. 1 (1), an aromatic polyamide was used as the heat resistant fiber, and the thickness of the base cloth 2 (76 g / m 2 ) obtained by plain weaving the polyamide was 5 on each side.
A web layer 1 made of aromatic polyamide fiber having a length of 76 mm and a length of d is laminated, and this is needling to form a nonwoven fabric body 3 made of heat resistant fiber.
【００１２】次に、図１（２）に示す工程では、図１
（１）に示す工程で得た不織布体３の片側表面に、太さ
＝１．５ｄ、長さ＝３８ｍｍの芳香族ポリイミド繊維か
らなるウエッブ（１００ｇ／ｍ2 ）を積層して、これを
表面層４とし、次いで、これらをニードリングにより絡
合してフェルト体５を形成する。次いで、図１（３）に
示す工程では、図１（２）に示す工程で得たフェルト体
５の表面層４に、ロール温度２８０℃の一対の熱ロール
で、１００ｋｇ／ｃｍの線圧をかけて０．５ｍ／ｍｉｎ
のスピードで熱プレス加工を行い、表面層４の芳香族ポ
リイミド繊維を収縮させて高密度化した表面層６を形成
する。即ち、前記加熱・加圧により、芳香族ポリイミド
繊維の密度を大きくすると共に、当該芳香族ポリイミド
繊維の断面形状を異形断面形状から偏平化し、表面を平
滑化した。このようにして、目付＝５１０ｇ／ｃｍ2 、
厚さ＝１．４ｍｍ、通気＝１０ｃｃ／ｃｍ2 ／ｓｅｃ、
の耐熱性濾材７（発明品）を得た。Next, in the step shown in FIG.
A web (100 g / m 2 ) made of an aromatic polyimide fiber having a thickness of 1.5 d and a length of 38 mm was laminated on one side surface of the nonwoven fabric body 3 obtained in the step (1), and this was used as a surface. The layer 4 is formed, and then these are entangled by needling to form the felt body 5. Then, in the step shown in FIG. 1 (3), a linear pressure of 100 kg / cm is applied to the surface layer 4 of the felt body 5 obtained in the step shown in FIG. 1 (2) with a pair of hot rolls having a roll temperature of 280 ° C. 0.5m / min
Hot pressing is performed at a speed of 1 to shrink the aromatic polyimide fibers of the surface layer 4 to form the densified surface layer 6. That is, the heating and pressurization increased the density of the aromatic polyimide fiber and flattened the cross-sectional shape of the aromatic polyimide fiber from the irregular cross-sectional shape to smooth the surface. In this way, the basis weight = 510 g / cm 2 ,
Thickness = 1.4 mm, ventilation = 10 cc / cm 2 / sec,
A heat resistant filter material 7 (invention product) was obtained.
【００１３】尚、本発明に使用される芳香族ポリイミド
繊維として、例えば、「レンチングＰ−８４」（商品名
＝オーストリア・レンチング社製）として市販されてい
る、ベンゾフェノンテトラカルボン酸二無水物（ＢＴＤ
Ａ）、トルイレンジイソシアネート（ＴＤＩ）及びメチ
レンジフェニルジイソシアネート（ＭＤＩ）の３者混合
物との縮重合物を主成分として紡糸されたものが挙げら
れる。As the aromatic polyimide fiber used in the present invention, for example, benzophenone tetracarboxylic acid dianhydride (BTD) commercially available as "RENTING P-84" (trade name: manufactured by Austria Lenzing) is used.
Examples include those obtained by spinning a polycondensation product of A), toluylene diisocyanate (TDI) and methylene diphenyl diisocyanate (MDI) as a main component.
【００１４】次に、比較として、耐熱性繊維として、芳
香族ポリアミドを用い、これを平織にした基布２（７６
ｇ／ｍ2 ）の両面に、各々、太さ＝２ｄ、長さ＝５１ｍ
ｍの芳香族ポリアミド繊維からなるウエッブ層（２１８
ｇ／ｍ2 ）を積層し、これをニードリングして絡合し、
フェルト体を形成する。次に、このフェルト体の表面を
毛焼した後、この表面に、ロール温度１６０℃の一対の
熱ロールで、５０ｋｇ／ｃｍの線圧をかけて０．５ｍ／
ｍｉｎのスピードで熱プレス加工を行い、目付＝５１２
ｇ／ｃｍ2 、厚さ＝１．７ｍｍ、通気＝２０ｃｃ／ｃｍ
2 ／ｓｅｃ、の耐熱性濾材（比較品）を得た。Next, for comparison, an aromatic polyamide was used as the heat resistant fiber, and the base fabric 2 (76) was woven into a plain woven fabric.
g / m 2 ) on both sides, thickness = 2d, length = 51m, respectively
m of aromatic polyamide fiber (218)
g / m 2 ) is laminated, and this is needling and entangled,
Form a felt body. Next, after burning the surface of the felt body, a linear pressure of 50 kg / cm was applied to the surface of the felt body with a pair of hot rolls having a roll temperature of 160 ° C. to give 0.5 m / m.
Heat press processing is performed at a speed of min, and basis weight = 512
g / cm 2 , thickness = 1.7 mm, ventilation = 20 cc / cm
A heat-resistant filter medium (comparative product) of 2 / sec was obtained.
【００１５】次に、発明品及び比較品のダスト払い落と
し後の圧力損失変化試験及びダストの残留率の変化の測
定を以下の条件で行った。 濾過流量＝９５リットル／ｍｉｎ 払い落とし流量＝１００リットル／ｍｉｎ （パルス ０．５ｓｅｃ．×１回、高圧パルスエアーに
よる逆圧） 濾過面積＝６４ｃｍ2 ダスト＝ＪＩＳ−９種タルク ダスト残留率＝（ＷSF−ＷSC）／（ＷSF−Ｗ0 ）×１０
０ 〔％〕 但し、ＷSF＝濾過後の濾材の重量〔ｇ〕 ＷSC＝ダスト払い落とし後の濾材の重量〔ｇ〕 Ｗ0 ＝試験前の濾材の重量〔ｇ〕 尚、圧損が２００ｍｍＨ2 Ｏに達した時点で、濾過を停
止し、ダストの払い落とし（繰り返し）を実施した。Next, the pressure loss change test after dust removal of the invention product and the comparative product and the measurement of the change of the dust residual rate were performed under the following conditions. Filtration flow rate = 95 liters / min Shaking off flow rate = 100 liters / min (pulse 0.5 sec. X 1 time, back pressure by high-pressure pulse air) Filtration area = 64 cm 2 dust = JIS-9 type talc dust residual rate = (W SF -W SC) / (W SF -W 0) × 10
0 [%] where W SF = weight of filter medium after filtration [g] W SC = weight of filter medium after dust removal [g] W 0 = weight of filter medium before test [g] Note that the pressure loss is 200 mmH 2 When O was reached, filtration was stopped and dust was removed (repeated).
【００１６】ダスト払い落とし後の圧力損失変化の結果
を図２に、ダストの残留率の変化の結果を図３に示す。
図２より、発明品は比較品に比べ、ダスト払い落とし後
の圧力損失が小さいことが確認された。これより、発明
品は、ダスト払い落とし性能に優れ、耐熱性濾材に付着
堆積したダストを周期的に払い落として使用する場合、
長期に亘り安定した捕集性能が得られることが立証され
た。FIG. 2 shows the result of the change in pressure loss after the dust was removed, and FIG. 3 shows the result of the change in the dust residual rate.
From FIG. 2, it was confirmed that the invention product has a smaller pressure loss after the dust is removed than the comparative product. From this, the invention product is excellent in dust removal performance, and when the dust deposited and deposited on the heat resistant filter medium is used by periodically removing it,
It has been proved that stable collection performance can be obtained over a long period of time.
【００１７】また、図３より、発明品は比較品に比べ、
ダスト残留率が極めて小さいことが確認された。これよ
り、発明品は、目詰まりしにくく、寿命が向上すること
が立証された。以上から、発明品は、耐熱性濾材として
極めて良好な性能を示すことが立証された。Also, from FIG. 3, the invention product is
It was confirmed that the dust residual rate was extremely small. From this, it was proved that the invention product is less likely to be clogged and has a longer life. From the above, it was proved that the invention product exhibits extremely good performance as a heat resistant filter medium.
【００１８】尚、本実施例では、不織布体３を構成する
耐熱性繊維として、芳香族ポリアミド繊維を用いたが、
これに限らず、濾材の使用温度条件や機械的条件などに
応じ、例えば、ＰＰＳ繊維，ガラス繊維など、他の耐熱
性繊維を用いてもよく、これらを単独、または、組み合
わせて用いてもよい。また、本実施例では、フェルト体
５の表面層４に、ロール温度２８０℃の一対の熱ロール
で、１００ｋｇ／ｃｍの線圧をかけて０．５ｍ／ｍｉｎ
のスピードで熱プレス加工を行なったが、これに限ら
ず、表面層４の高密度化と、不織布体３を構成する耐熱
性繊維の収縮を防止可能であれば、熱・加圧処理の温
度，圧力及び処理時間は、濾材の使用条件などにより決
定してよい。In this embodiment, aromatic polyamide fiber is used as the heat resistant fiber constituting the nonwoven fabric body 3.
Not limited to this, other heat-resistant fibers such as PPS fibers and glass fibers may be used depending on the use temperature conditions and mechanical conditions of the filter medium, and these may be used alone or in combination. .. In addition, in this embodiment, a linear pressure of 100 kg / cm is applied to the surface layer 4 of the felt body 5 by a pair of heat rolls having a roll temperature of 280 ° C. to apply a pressure of 0.5 m / min.
Although the heat pressing was performed at the speed of, the density of the surface layer 4 and the temperature of the heat / pressure treatment are not limited as long as the heat resistant fibers constituting the nonwoven fabric body 3 can be prevented from shrinking. The pressure and the treatment time may be determined according to the usage conditions of the filter medium.
【００１９】[0019]
【発明の効果】以上説明したように、本発明によれば、
芳香族ポリイミド繊維からなるウエッブを前記フェルト
体の表面層とし、これに熱と圧を加えることで、前記表
面層を高密度化して表面積を増大させ、表面層の細孔の
微小化及び平滑化を達成し、ダストの捕集力を向上する
と共に、ダストが濾材内部に侵入することを防ぐ結果、
ダストの剥離性を向上することができる。従って、芳香
族ポリイミド繊維の特性である優れた強度，耐熱性，難
燃性，形状保持性を付与すると共に、ダストの捕集効率
及び剥離性を向上することができる。As described above, according to the present invention,
A web made of aromatic polyimide fiber is used as the surface layer of the felt body, and by applying heat and pressure to the surface layer, the surface layer is densified to increase the surface area, and the pores of the surface layer are made fine and smooth. As a result, the dust collecting ability is improved and the dust is prevented from entering the inside of the filter medium.
The peelability of dust can be improved. Therefore, it is possible to impart excellent strength, heat resistance, flame retardancy, and shape retention, which are the characteristics of the aromatic polyimide fiber, and improve the dust collection efficiency and the peeling property.
【００２０】また、前記フェルト体の不織布体（表面層
以外）の繊維密度は、比較的小さく保たれるため、目詰
まりを防止し、寿命を向上することができ、また、この
不織布体により、濾材の強度をより向上することができ
る。この結果、極めて良好なダスト捕集性，耐熱性，難
燃性，強度，耐摩耗性及び透過性を有し、且つ、ダスト
払い落とし性能に優れた長寿命な耐熱性濾材を提供する
ことができる。Further, since the fiber density of the non-woven fabric of the felt body (other than the surface layer) is kept relatively low, clogging can be prevented and the life can be improved. The strength of the filter medium can be further improved. As a result, it is possible to provide a long-life heat-resistant filter medium which has extremely good dust collecting properties, heat resistance, flame retardancy, strength, abrasion resistance, and permeability, and which also has excellent dust removal performance. it can.
【図１】本発明の実施例に係る濾材の製造工程を示す断
面図である。FIG. 1 is a cross-sectional view showing a manufacturing process of a filter medium according to an embodiment of the present invention.
【図２】本発明の実施例に係るダスト払い落とし後の圧
力損失変化を示す図である。FIG. 2 is a diagram showing changes in pressure loss after dust is removed according to an embodiment of the present invention.
【図３】本発明の実施例に係るダストの残留率の変化を
示す図である。FIG. 3 is a diagram showing a change in a dust residual rate according to an example of the present invention.
１ ウエッブ層 ２ 基布 ３ 不織布体 ４ 表面層 ５ フェルト体 ６ 高密度化した表面層 ７ 耐熱性濾材 1 Web Layer 2 Base Fabric 3 Nonwoven Fabric 4 Surface Layer 5 Felt Body 6 Densified Surface Layer 7 Heat Resistant Filter Material
Claims (1)
に、芳香族ポリイミド繊維からなるウエッブを積層して
表面層とし、ニードリングにより絡合してフェルト体を
形成し、当該フェルト体の表面層に熱と圧を加えて当該
芳香族ポリイミド繊維を収縮させ、高密度化したことを
特徴とする耐熱性濾材。1. A surface layer obtained by laminating a web made of aromatic polyimide fiber on one surface of a non-woven fabric made of heat-resistant fiber and entangled by needling to form a felt body, and the surface of the felt body. A heat-resistant filter medium, characterized in that heat and pressure are applied to a layer to shrink the aromatic polyimide fiber to increase the density.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22070291A JPH0557116A (en) | 1991-08-30 | 1991-08-30 | Heat-resistant filter material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22070291A JPH0557116A (en) | 1991-08-30 | 1991-08-30 | Heat-resistant filter material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0557116A true JPH0557116A (en) | 1993-03-09 |
Family
ID=16755159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22070291A Pending JPH0557116A (en) | 1991-08-30 | 1991-08-30 | Heat-resistant filter material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0557116A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0641588A1 (en) * | 1993-08-04 | 1995-03-08 | Thomas Josef Heimbach GmbH & Co. | Filtering material |
| WO1995009685A1 (en) * | 1993-10-06 | 1995-04-13 | E.I. Du Pont De Nemours And Company | High efficiency filter fabric for hot gas filtration |
| EP0718429A1 (en) * | 1994-12-16 | 1996-06-26 | Ichikawa Co.,Ltd. | Heat-resisting cushion material and method for producing the same |
| KR20020074868A (en) * | 2001-03-22 | 2002-10-04 | 크린에어테크놀로지 주식회사 | Non-flammable filter |
| KR100364868B1 (en) * | 2000-10-25 | 2002-12-16 | 주식회사 나노테크닉스 | A carbin air filter for car, and a process of preparing the same |
-
1991
- 1991-08-30 JP JP22070291A patent/JPH0557116A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0641588A1 (en) * | 1993-08-04 | 1995-03-08 | Thomas Josef Heimbach GmbH & Co. | Filtering material |
| WO1995009685A1 (en) * | 1993-10-06 | 1995-04-13 | E.I. Du Pont De Nemours And Company | High efficiency filter fabric for hot gas filtration |
| EP0718429A1 (en) * | 1994-12-16 | 1996-06-26 | Ichikawa Co.,Ltd. | Heat-resisting cushion material and method for producing the same |
| CN1070769C (en) * | 1994-12-16 | 2001-09-12 | 市川毛织株式会社 | Heat-resisting cushion material and producing the same |
| KR100364868B1 (en) * | 2000-10-25 | 2002-12-16 | 주식회사 나노테크닉스 | A carbin air filter for car, and a process of preparing the same |
| KR20020074868A (en) * | 2001-03-22 | 2002-10-04 | 크린에어테크놀로지 주식회사 | Non-flammable filter |
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