JP2001334115A - Production process of filter paper for high temperature air filter and filter paper for high temperature air filter - Google Patents
Production process of filter paper for high temperature air filter and filter paper for high temperature air filterInfo
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- JP2001334115A JP2001334115A JP2000155141A JP2000155141A JP2001334115A JP 2001334115 A JP2001334115 A JP 2001334115A JP 2000155141 A JP2000155141 A JP 2000155141A JP 2000155141 A JP2000155141 A JP 2000155141A JP 2001334115 A JP2001334115 A JP 2001334115A
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- Prior art keywords
- filter paper
- air filter
- high temperature
- filter
- papermaking
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は高温用エアフィルタ
用濾紙の製造方法及び高温用エアフィルタ用濾紙に係
り、特に、４００℃を超える高温清浄空気を長期に亘り
安定に創り出すことができる高温用エアフィルタ用濾紙
の製造方法と、この方法により製造された高温用エアフ
ィルタ用濾紙に関する。なお、本発明の高温用エアフィ
ルタ用濾紙の浄化対象は空気以外のその他の気体も含ま
れる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a filter paper for a high-temperature air filter and a filter paper for a high-temperature air filter, and more particularly to a high-temperature filter capable of stably producing high-temperature clean air exceeding 400 ° C. for a long period of time. The present invention relates to a method of manufacturing a filter paper for an air filter and a filter paper for a high temperature air filter manufactured by the method. The object of purification of the filter paper for an air filter for high temperature of the present invention includes other gases other than air.
【０００２】[0002]
【従来の技術】従来、電子精密工業等のクリーンルー
ム、バイオロジカルクリーンルーム、クリーンベンチ等
の清浄空間を創り出すために、エアフィルタ用濾紙が用
いられている。エアフィルタ用濾紙は、一般に、微細ガ
ラス繊維を水中に分散させて湿式抄造することにより製
造される。得られた抄紙は、その後強度付与のために結
合剤が塗布される。この結合剤としては、一般にアルカ
リ系、ウレタン系等の有機物が使用されている。2. Description of the Related Art Conventionally, filter paper for an air filter has been used in order to create a clean space such as a clean room, a biological clean room, a clean bench or the like in the electronic precision industry. The filter paper for an air filter is generally manufactured by dispersing fine glass fibers in water and wet-making the same. The obtained paper is then coated with a binder for imparting strength. As the binder, generally, an organic substance such as an alkali or urethane is used.
【０００３】しかし、４００℃を超える高温清浄空気を
必要とする場合、このような高温では有機物は分散して
しまうため、結合剤を含まない濾紙とする必要があり、
例えば、特開平１１−１０４４２６号公報では、結合剤
を含まないガラス繊維フェルトを金網等の耐熱性の網体
で挟持して高温用エアフィルタに用いることが提案され
ている。However, when high-temperature clean air exceeding 400 ° C. is required, organic substances are dispersed at such high temperatures, so that it is necessary to use filter paper containing no binder.
For example, Japanese Patent Application Laid-Open No. H11-104426 proposes that a glass fiber felt containing no binder is sandwiched between heat-resistant meshes such as a wire mesh and used for a high-temperature air filter.
【０００４】[0004]
【発明が解決しようとする課題】結合剤を含まないガラ
ス繊維フェルトであれば、高温での使用が可能となる
が、その耐熱性の程度は高々２５０℃程度であり、十分
に高いとは言えず、しかも ガラス繊維フェルトでは、繊維を均一に分散させる
ことが難しく、その結果、得られるフェルトには粗密構
造ができる。密の部分における捕集効率は良好である
が、粗の部分は捕集効率が悪くなるため、全体としての
捕集効率のバラツキが大きく、安定した浄化を行えな
い。A glass fiber felt containing no binder can be used at a high temperature, but its heat resistance is at most about 250 ° C., which is sufficiently high. In addition, it is difficult to uniformly disperse fibers in glass fiber felt, and as a result, the resulting felt has a dense structure. Although the collection efficiency in the dense portion is good, the collection efficiency in the rough portion is poor, so that the variation in the overall collection efficiency is large and stable purification cannot be performed.
【０００５】 上記の問題点を解決するべく、粗の部
分をなくすためには、使用するガラス繊維の量を多くす
る必要があり、コストが高いものとなる。[0005] In order to solve the above-mentioned problems, in order to eliminate a coarse portion, it is necessary to increase the amount of glass fiber to be used, resulting in high cost.
【０００６】 繊維の圧縮成形によるフェルトの製造
は、湿式抄造による抄紙の製造に比べて生産性が低く、
製造工程の面からもコストアップを招く。といった問題
点があった。[0006] The production of felt by compression molding of fibers has lower productivity than the production of paper by wet papermaking,
This leads to an increase in cost in terms of the manufacturing process. There was a problem.
【０００７】なお、結合剤を用いずに、ガラス繊維のみ
から湿式抄造により製造された抄紙では、高温での長期
使用にも十分に耐え得る強度を得ることができず、使用
中に抄紙から繊維が飛散する自己発塵の問題が発生し、
実用的でない。Incidentally, papermaking manufactured by wet papermaking only from glass fibers without using a binder cannot provide sufficient strength to withstand long-term use at high temperatures, and the papermaking fibers must be removed during use. Causes the problem of self-dusting,
Not practical.
【０００８】本発明は上記従来の問題点を解決し、湿式
抄造により製造されるエアフィルタ用濾紙であって、高
強度で捕集効率のバラツキがなく、４００℃を超える高
温においても長期に亘り安定に使用することができる高
温用エアフィルタ用濾紙を提供することを目的とする。The present invention solves the above-mentioned conventional problems, and is a filter paper for an air filter manufactured by wet papermaking, which has a high strength, has no variation in collection efficiency, and has a long life even at a high temperature exceeding 400 ° C. It is an object of the present invention to provide a high-temperature air filter paper that can be used stably.
【０００９】[0009]
【課題を解決するための手段】本発明の高温用エアフィ
ルタ用濾紙の製造方法は、極細シリカ繊維を含む繊維材
料を無機接着剤及びカチオン定着剤を含む抄紙用水を用
いて湿式抄造することにより高温用エアフィルタ用濾紙
を製造する方法であって、該抄紙用水中の無機接着剤の
含有量が繊維材料１００重量部に対して０．５〜５．０
重量部であり、カチオン定着剤の含有量が繊維材料１０
０重量部に対して０．１〜１．０重量部であることを特
徴とする。According to the present invention, there is provided a method for producing a filter paper for an air filter for high temperature, comprising the steps of: wet-making a fiber material containing ultrafine silica fibers using paper-making water containing an inorganic adhesive and a cationic fixing agent. A method for producing a filter paper for an air filter for high temperature, wherein the content of the inorganic adhesive in the papermaking water is 0.5 to 5.0 with respect to 100 parts by weight of the fiber material.
Parts by weight, and the content of the cationic fixing agent is
0.1 to 1.0 parts by weight with respect to 0 parts by weight.
【００１０】この方法で製造されたエアフィルタ用濾紙
は、４００℃以上の耐熱性を有する極細シリカ繊維を主
体繊維とするため、耐熱性に優れ、また湿式抄造に製造
されるため、繊維の均一分散性に優れ、捕集効率のバラ
ツキが少ない。The filter paper for an air filter manufactured by this method is excellent in heat resistance because the main fiber is ultrafine silica fiber having a heat resistance of 400 ° C. or more. Excellent dispersibility and little variation in collection efficiency.
【００１１】繊維材料のみを抄造し、繊維材料の絡み合
いだけによる抄紙では、エアフィルタ用濾紙としての十
分な強度を得ることはできないが、本発明では、繊維同
士を接着して強度を高めるために、抄紙用水に無機接着
剤を添加して、繊維材料の分散と同時に無機接着剤を付
与する。[0011] Papermaking only by fiber material and only entanglement of the fiber material cannot provide sufficient strength as a filter paper for an air filter. However, in the present invention, in order to increase the strength by bonding fibers together. The inorganic adhesive is added to the papermaking water to disperse the fiber material and simultaneously provide the inorganic adhesive.
【００１２】この無機接着剤により、得られる高温用エ
アフィルタ用濾紙が強化されるが、この強化のための接
着剤は耐熱性に優れる無機接着剤であるため、高熱によ
る強度低下の問題はない。[0012] This inorganic adhesive strengthens the resulting filter paper for a high-temperature air filter. However, since the adhesive for this reinforcement is an inorganic adhesive having excellent heat resistance, there is no problem of strength reduction due to high heat. .
【００１３】しかし、単に抄紙用水に無機接着剤を添加
したのみでは、湿造時の脱水工程で水と共に無機接着剤
が流出し、繊維材料同士の結合に寄与しない。本発明で
は、カチオン定着剤を併用することで、繊維材料に無機
接着剤を固定し、脱水時の流出を防止して、無機接着剤
による接着効率を高めるため、無機接着剤による十分な
強度付与効果で、高強度で自己発塵の問題のない良好な
高温用エアフィルタ用濾紙を作ることができる。However, if the inorganic adhesive is simply added to the papermaking water, the inorganic adhesive flows out together with the water in the dewatering step during wet-making, and does not contribute to the bonding between the fiber materials. In the present invention, by using a cationic fixing agent in combination, the inorganic adhesive is fixed to the fiber material, the outflow during dehydration is prevented, and the adhesion efficiency by the inorganic adhesive is increased, so that sufficient strength is imparted by the inorganic adhesive. With this effect, it is possible to produce a high-temperature filter paper for a high-temperature air filter that is high in strength and free from problems of self-dusting.
【００１４】本発明において、抄紙用水のｐＨは２．５
〜５．０、特に３．０〜４．０であることが好ましい。In the present invention, the pH of the papermaking water is 2.5
-5.0, particularly preferably 3.0-4.0.
【００１５】また、極細シリカ繊維の平均繊維径は０．
５〜０．７μｍであることが好ましい。The average fiber diameter of the ultrafine silica fiber is 0.1.
It is preferably from 5 to 0.7 μm.
【００１６】本発明の高温用エアフィルタ用濾紙は、こ
のような本発明の高温用エアフィルタ用濾紙の製造方法
により製造されたものであり、その目付は９０〜１１０
ｇ／ｍ２であることが好ましい。The filter paper for a high temperature air filter of the present invention is manufactured by the method for manufacturing a filter paper for a high temperature air filter of the present invention, and has a basis weight of 90 to 110.
g / m 2 .
【００１７】[0017]
【発明の実施の形態】以下に本発明の実施の形態を詳細
に説明する。Embodiments of the present invention will be described below in detail.
【００１８】本発明において用いる繊維材料は、高耐熱
性の極細シリカ繊維である。The fiber material used in the present invention is a highly heat-resistant ultrafine silica fiber.
【００１９】極細シリカ繊維としては、平均繊維径０．
８μｍ以下、特に０．５〜０．７μｍの極細繊維である
ことが、極細シリカ繊維自体の絡み合いによる強度向上
及び捕集効率の面で好ましい。The ultrafine silica fiber has an average fiber diameter of 0.1.
Ultrafine fibers having a diameter of 8 μm or less, particularly 0.5 to 0.7 μm, are preferable in view of improvement in strength and collection efficiency due to entanglement of the ultrafine silica fibers themselves.
【００２０】本発明において用いる繊維材料は、このよ
うな極細シリカ繊維のみで構成されることが、得られる
高温用エアフィルタ用濾紙の耐熱性の観点から好ましい
が、コスト削減のために、極細シリカ繊維の一部をＥガ
ラス組成の極細ガラス繊維或いは、Ｅガラスと同等の耐
熱性を有するガラス、例えばＳガラス組成の極細ガラス
繊維で代替しても良い。また、同様の目的で、極細シリ
カ繊維の一部をガラス長繊維（チョップドストランド）
で代替してもい。The fiber material used in the present invention is preferably composed only of such ultrafine silica fibers from the viewpoint of the heat resistance of the filter paper for a high-temperature air filter to be obtained. Some of the fibers may be replaced with ultrafine glass fibers having an E glass composition or glass having heat resistance equivalent to that of E glass, for example, ultrafine glass fibers having an S glass composition. For the same purpose, a part of ultrafine silica fiber is converted into glass long fiber (chopped strand).
May be substituted.
【００２１】このように極細シリカ繊維の一部をガラス
繊維で代替する場合、耐熱性の確保のために、繊維材料
中の極細シリカ繊維の含有量が５０重量％以上、特に６
０重量％以上となるようにするのが好ましい。When a part of the ultrafine silica fiber is replaced with glass fiber, the content of the ultrafine silica fiber in the fiber material is 50% by weight or more, especially 6%, in order to secure heat resistance.
It is preferable that the content be 0% by weight or more.
【００２２】本発明において用いる抄紙用水は無機接着
剤とカチオン定着剤とを含むものである。The papermaking water used in the present invention contains an inorganic adhesive and a cationic fixing agent.
【００２３】ここで無機接着剤としては、例えば、日産
化学（株）製「アルミナゾル１００」、伯東（株）製
「ハクゾールＳ１５０」や、日産化学（株）製「ストテ
ック０」等を用いることができる。Here, as the inorganic adhesive, for example, "Aluminasol 100" manufactured by Nissan Chemical Co., Ltd., "Hakusol S150" manufactured by Hakuto Co., Ltd., "Stotech 0" manufactured by Nissan Chemical Co., Ltd. may be used. it can.
【００２４】抄紙用水中の無機接着剤の含有量が少な過
ぎると十分な強度付与効果が得られず、逆に多過ぎると
自己発塵の恐れがあることから、無機接着剤は繊維材料
１００重量部に対して０．５〜５．０重量部、特に１．
０〜３．０重量部とする。If the content of the inorganic adhesive in the papermaking water is too small, a sufficient strength-imparting effect cannot be obtained, while if it is too large, self-dusting may occur. 0.5-5.0 parts by weight, especially 1.
0 to 3.0 parts by weight.
【００２５】また、カチオン定着剤としては、カチオン
性アクリルアミドポリマー、具体的には荒川化学（株）
製「ポリストロン３１１」、荒川化学（株）製「ポリス
トロン７０５」、英国アライド・コロイド社製「パーコ
ール２９２」、英国アライド・コロイド社製「パーコー
ル１４０」、英国アライド・コロイド社製「パーコール
４５５」、伯東（株）製「ポリマスターＲ６０５」、伯
東（株）製「ポリマスターＲ６３０」を用いることがで
きる。As the cationic fixing agent, a cationic acrylamide polymer, specifically, Arakawa Chemical Co., Ltd.
"Polystron 311" manufactured by Arakawa Chemical Co., Ltd. "Polystron 705" manufactured by Allied Colloids UK, "Percoll 140" manufactured by Allied Colloids UK, "Percoll 455" manufactured by Allied Colloids UK "Polymaster R605" manufactured by Hakuto Co., Ltd., and "Polymaster R630" manufactured by Hakuto Co., Ltd. can be used.
【００２６】抄紙用水中のカチオン定着剤の含有量が少
なすぎると十分な定着効果が得られないために、無機接
着剤の歩留りが不足して十分な強度付与結果が得られ
ず、逆に多過ぎると繊維材料自体の凝集が起こり、繊維
材料の分散不良で捕集効率のバラツキの多いものとなる
ことから、カチオン定着剤は繊維材料１００重量部に対
して０．１〜１．０重量部とするのが好ましい。If the content of the cationic fixing agent in the papermaking water is too small, a sufficient fixing effect cannot be obtained, so that the yield of the inorganic adhesive is insufficient and a sufficient strength imparting result cannot be obtained. If it is too long, the fiber material itself agglomerates, and the dispersion efficiency of the fiber material becomes large due to poor dispersion. Therefore, the cationic fixing agent is used in an amount of 0.1 to 1.0 part by weight based on 100 parts by weight of the fiber material. It is preferred that
【００２７】このカチオン定着剤は抄造後、４００℃以
上、好ましくは５００℃程度で加熱することにより除去
されるため、何ら製品としての高温用エアフィルタ用濾
紙に有機物として残留することはない。Since the cationic fixing agent is removed by heating at a temperature of 400 ° C. or higher, preferably about 500 ° C. after papermaking, it does not remain as an organic substance on a high temperature air filter paper as a product.
【００２８】また、本発明で用いる抄紙用水はｐH２．
５〜５．０、特に３．０〜４．０の酸性の抄紙用水であ
ることが好ましい。抄紙用水のｐＨが５．０を超えて
も、２．５未満であっても、無機接着剤粒子が不安定と
なり、部分的にゲル化現象が起こり、得られる抄紙の均
一性が劣るものとなる。特に、抄紙用水がｐH２．５未
満の強酸であると、抄紙設備の腐食の問題が生じ、好ま
しくない。The papermaking water used in the present invention has a pH of 2.
It is preferably 5 to 5.0, particularly 3.0 to 4.0 acidic papermaking water. If the pH of the papermaking water is more than 5.0 or less than 2.5, the inorganic adhesive particles become unstable and gelation occurs partially, resulting in poor uniformity of the obtained paper. Become. In particular, if the papermaking water is a strong acid having a pH of less than 2.5, a problem of corrosion of papermaking equipment occurs, which is not preferable.
【００２９】本発明において、抄造方法自体に特に制限
はなく、所定の割合で無機接着剤及びカチオン定着剤を
含む所定のｐＨの抄紙用水に繊維材料を分散させて、常
法に従って湿式抄造を行えば良い。In the present invention, the papermaking method itself is not particularly limited, and the fibrous material is dispersed in papermaking water of a predetermined pH containing an inorganic adhesive and a cationic fixing agent at a predetermined ratio, and wet papermaking is performed according to a conventional method. Good.
【００３０】このようにして得られる高温用エアフィル
タ用濾紙の目付は９０〜１１０ｇ／ｍ２程度であること
が、捕集効率及び強度の面から好ましい。The thus obtained filter paper for a high-temperature air filter preferably has a basis weight of about 90 to 110 g / m 2 in terms of collection efficiency and strength.
【００３１】このような本発明のエアフィルタ用濾紙は
一般的には、２枚の耐熱性の網体間に挟持され、エアフ
ィルタの濾材として用いられる。The filter paper for an air filter of the present invention is generally sandwiched between two heat-resistant nets and used as a filter medium for an air filter.
【００３２】[0032]
【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明する。The present invention will be described more specifically below with reference to examples and comparative examples.
【００３３】なお、以下の実施例及び比較例で使用した
繊維材料及び無機接着剤、カチオン定着剤は次の通りで
ある。 〔極細シリカ繊維〕 米国マンビル社製「１０６Ｑ」 平均繊維径 ０．６μｍ 〔無機接着剤〕 日産化学（株）製「スノーテック０」 〔カチオン定着剤〕 英国アライド・コロイド社製「パーコール２９２」 また、製造されたエアフィルタ用濾紙の試験方法と判定
基準は次の通りである。 〔強度（Ｎ）〕ＪＩＳ Ｐ ８１１３により測定した。 判定基準：９．８Ｎ以上を○、９．８Ｎ未満を×とし
た。 〔圧力損失（Ｐａ）〕濾紙に通過風速５．３ｃｍ／秒で
空気を通過させた時の通過抵抗をマノメーターにより測
定した。 判定基準：３３０Ｐａ以下を○、３３０Ｐａを超えるも
のを×とした。 〔捕集効率（％）〕平均粒子径０．３μのジオクチルフ
タレート（ＤＯＰ）粒子を発生させて濾紙を通過させ、
濾紙の上流側と下流側のＤＯＰ粒子の個数比をレーザ・
パーティクルカウンターで測定し、捕集効率を算出し
た。 判定基準：９９．９７％以上を○、９９．９７％未満を
×とした。 〔自己発塵〕捕集効率を測定する装置の上流側にＵＬＰ
Ａ濾紙（超高性能濾紙）を設置して、流れる空気を完全
に清浄なものとし、評価する濾紙にこの空気を通過させ
る。濾紙を通過した空気をレーザ・パーティクルカウン
ターで粒径別に測定した。判定基準：１立方フィート当
たり、粒径１μ以上のパーティクルが１０００個未満を
○、１０００個以上を×とした。The fiber materials, inorganic adhesives and cationic fixing agents used in the following Examples and Comparative Examples are as follows. [Ultrafine silica fiber] "106Q" manufactured by Manville, USA Average fiber diameter 0.6 μm [Inorganic adhesive] "Snowtec 0" manufactured by Nissan Chemical Co., Ltd. [Cation fixing agent] "Percoll 292" manufactured by Allied Colloids, UK The test method and criteria for the manufactured filter paper for an air filter are as follows. [Strength (N)] Measured according to JIS P 8113. Judgment criteria: 9.8 N or more was evaluated as O, and less than 9.8 N as X. [Pressure loss (Pa)] The passage resistance when air was passed through the filter paper at a passing air velocity of 5.3 cm / sec was measured by a manometer. Judgment criteria: 330 Pa or less was rated as O, and those exceeding 330 Pa was rated as X. [Collection efficiency (%)] Dioctyl phthalate (DOP) particles having an average particle diameter of 0.3 μm are generated and passed through a filter paper.
The ratio of the number of DOP particles upstream and downstream of the filter paper
The measurement was performed with a particle counter, and the collection efficiency was calculated. Judgment criteria: 99.97% or more was evaluated as O, and less than 99.97% as X. [Self-dusting] ULP upstream of the device for measuring collection efficiency
A filter paper (ultra high performance filter paper) is installed to make the flowing air completely clean and pass this air through the filter paper to be evaluated. The air passing through the filter paper was measured for each particle size using a laser particle counter. Judgment criteria: Less than 1000 particles having a particle size of 1 μm or more per cubic foot were rated as ○, and 1,000 or more particles were rated as x.
【００３４】実施例１〜３、比較例１〜３ 表１に示す極細シリカ繊維を、表１に示す無機接着剤及
びカチオン定着剤の配合、及びｐＨの抄紙用水を用いて
湿式抄造し、その後４００℃以上で加熱して有機成分を
除去することにより、目付１００ｇ／ｍ２の濾紙を製造
した。Examples 1 to 3 and Comparative Examples 1 to 3 The ultrafine silica fibers shown in Table 1 were wet-processed using an inorganic adhesive and a cationic fixing agent shown in Table 1, and a papermaking water having a pH. By heating at 400 ° C. or higher to remove organic components, filter paper having a basis weight of 100 g / m 2 was produced.
【００３５】この濾紙の評価結果を表１に示す。Table 1 shows the evaluation results of the filter paper.
【００３６】[0036]
【表１】 [Table 1]
【００３７】表１より、本発明の方法により製造された
高温用エアフィルタ用濾紙は、高強度でフィルタ性能に
優れることがわかる。Table 1 shows that the filter paper for a high temperature air filter manufactured by the method of the present invention has high strength and excellent filter performance.
【００３８】[0038]
【発明の効果】以上詳述した通り、本発明によれば、高
強度で捕集効率のバラツキがなく、また、自己発塵の問
題もなく、４００℃を超える高温においても長期に亘り
安定に使用することができる高温用エアフィルタ用濾紙
が、高い生産性にて安価に提供される。As described in detail above, according to the present invention, there is no variation in the collection efficiency with high strength, there is no problem of self-dusting, and even at a high temperature exceeding 400 ° C., it is stable for a long time. The filter paper for a high-temperature air filter that can be used is provided at high productivity and at low cost.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｄ２１Ｈ 27/08 Ｄ２１Ｈ 27/08 Ｆターム(参考） 4D019 AA01 BA04 BA06 BA13 BA16 BB05 BC12 BD01 CB06 4L055 AF01 AF46 AG18 AG73 AH09 AH37 EA31 EA32 FA19 GA31──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) D21H 27/08 D21H 27/08 F term (Reference) 4D019 AA01 BA04 BA06 BA13 BA16 BB05 BC12 BD01 CB06 4L055 AF01 AF46 AG18 AG73 AH09 AH37 EA31 EA32 FA19 GA31
Claims (7)
着剤及びカチオン定着剤を含む抄紙用水を用いて湿式抄
造することにより高温用エアフィルタ用濾紙を製造する
方法であって、 該抄紙用水中の無機接着剤の含有量が繊維材料１００重
量部に対して０．５〜５．０重量部であり、カチオン定
着剤の含有量が繊維材料１００重量部に対して０．１〜
１．０重量部であることを特徴とする高温用エアフィル
タ用濾紙の製造方法。1. A method for producing a filter paper for an air filter for high temperature by wet-fabricating a fiber material containing ultrafine silica fibers using papermaking water containing an inorganic adhesive and a cationic fixing agent, comprising: Is 0.5 to 5.0 parts by weight based on 100 parts by weight of the fiber material, and the content of the cationic fixing agent is 0.1 to 5.0 parts by weight based on 100 parts by weight of the fiber material.
A method for producing a filter paper for an air filter for high temperature, characterized by being 1.0 part by weight.
２．５〜５．０であることを特徴とする高温用エアフィ
ルタ用濾紙の製造方法。2. The method for producing a filter paper for an air filter for high temperature according to claim 1, wherein the pH of the papermaking water is 2.5 to 5.0.
３．０〜４．０であることを特徴とする高温用エアフィ
ルタ用濾紙の製造方法。3. The method according to claim 2, wherein the pH of the papermaking water is 3.0 to 4.0.
て、極細シリカ繊維の平均繊維径が０．５〜０．７μｍ
であることを特徴とする高温用エアフィルタ用濾紙の製
造方法。4. The ultrafine silica fiber according to claim 1, wherein the average fiber diameter is 0.5 to 0.7 μm.
A method for producing a filter paper for an air filter for high temperature, characterized by the following.
て、繊維材料が極細シリカ繊維のみで構成されているこ
とを特徴とする高温用エアフィルタ用濾紙の製造方法。5. The method for producing a high-temperature air filter paper according to claim 1, wherein the fiber material is composed of only ultrafine silica fibers.
の方法で製造された高温用エアフィルタ用濾紙。6. A high-temperature filter paper for an air filter manufactured by the method according to claim 1. Description:
ｇ／ｍ２であることを特徴とする高温用エアフィルタ用
濾紙。7. The method according to claim 6, wherein the basis weight is 90 to 110.
g / m 2 , a filter paper for a high temperature air filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000155141A JP2001334115A (en) | 2000-05-25 | 2000-05-25 | Production process of filter paper for high temperature air filter and filter paper for high temperature air filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000155141A JP2001334115A (en) | 2000-05-25 | 2000-05-25 | Production process of filter paper for high temperature air filter and filter paper for high temperature air filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001334115A true JP2001334115A (en) | 2001-12-04 |
Family
ID=18660129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000155141A Pending JP2001334115A (en) | 2000-05-25 | 2000-05-25 | Production process of filter paper for high temperature air filter and filter paper for high temperature air filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001334115A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008260016A (en) * | 2008-05-30 | 2008-10-30 | Nippon Muki Co Ltd | Method for manufacturing air filter for elevated temperature use |
-
2000
- 2000-05-25 JP JP2000155141A patent/JP2001334115A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008260016A (en) * | 2008-05-30 | 2008-10-30 | Nippon Muki Co Ltd | Method for manufacturing air filter for elevated temperature use |
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