JPH10277332A - Filter - Google Patents
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- JPH10277332A JPH10277332A JP9108256A JP10825697A JPH10277332A JP H10277332 A JPH10277332 A JP H10277332A JP 9108256 A JP9108256 A JP 9108256A JP 10825697 A JP10825697 A JP 10825697A JP H10277332 A JPH10277332 A JP H10277332A
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- adsorbent
- porous substrate
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- solvent
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Abstract
Description
【０００１】[0001]
【発明の技術分野】本発明は、吸着剤が高度に露出して
吸着能に優れ、かつ吸着剤の保持力にも優れて消臭等の
種々の用途に好適なフィルタに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter which is highly exposed to an adsorbent and has an excellent adsorbing ability, and also has an excellent adsorbent holding power and is suitable for various uses such as deodorization.
【０００２】[0002]
【発明の背景】従来、多孔基材に吸着剤を電気植毛して
なるフィルタが知られていたが、保持力に乏しくて吸着
剤が脱落しやすい問題点があった。吸着剤の脱落は、健
康維持上等の点より医療分野で特に問題となる。前記に
鑑みて吸着剤を接着剤等のバインダ溶液と混合してそれ
を多孔基材に含浸させて、乾燥固定したものも提案され
ている（特開昭６１−１３８５１１公報、特開平２−８
３０１６号公報等）。BACKGROUND OF THE INVENTION Conventionally, there has been known a filter in which an adsorbent is electro-flocked on a porous substrate. However, there has been a problem that the adsorbent tends to fall off due to poor holding power. Dropping of the adsorbent is particularly problematic in the medical field from the viewpoint of maintaining health. In view of the above, there has been proposed a method in which an adsorbent is mixed with a binder solution such as an adhesive, impregnated into a porous substrate, and dried and fixed (Japanese Patent Application Laid-Open Nos. 61-138511 and 2-8).
No. 3016).
【０００３】しかしながら、バインダ成分が吸着剤の表
面を被覆して吸着剤の露出度に乏しく、被吸着物と吸着
剤との接触の機会が少ないために吸着能に乏しい問題点
があった。However, there has been a problem that the binder component covers the surface of the adsorbent and the degree of exposure of the adsorbent is poor, and there is little chance of contact between the adsorbent and the adsorbent, resulting in poor adsorbability.
【０００４】[0004]
【発明の技術的課題】本発明は、吸着剤の保持力に優れ
て吸着剤が脱落しにくく、しかも吸着剤の露出度に優れ
被吸着物との有効接触面積が多くて吸着能に優れるフィ
ルタの開発を課題とする。The present invention relates to a filter which has excellent adsorbent holding power, is hard to fall off the adsorbent, has excellent exposure of the adsorbent, has a large effective contact area with an object to be adsorbed, and has excellent adsorbability. The task is to develop
【０００５】[0005]
【課題の解決手段】本発明は、多孔基材の孔部に吸着剤
を有し、その吸着剤が繊維状のポリマーの多数本を介し
て前記多孔基材に連結保持されてなることを特徴とする
フィルタを提供するものである。The present invention is characterized in that an adsorbent is provided in pores of a porous base material, and the adsorbent is connected and held to the porous base material through a large number of fibrous polymers. Is provided.
【０００６】[0006]
【発明の効果】本発明によれば、多数本の繊維状ポリマ
ーを介し吸着剤が多孔基材に連結保持されてなるので、
吸着剤の保持力ないし固定力に優れて吸着剤が脱落しに
くく、しかも吸着剤を被覆するポリマー成分が少なくて
吸着剤の露出度に優れ、被吸着物との有効接触面積が多
くて吸着能に優れるフィルタを得ることができる。According to the present invention, the adsorbent is connected and held to the porous substrate via a large number of fibrous polymers.
Excellent adsorbent holding or fixing power makes it difficult for the adsorbent to fall off.Furthermore, the amount of polymer component coating the adsorbent is small and the adsorbent has excellent exposure. A filter excellent in the above can be obtained.
【０００７】[0007]
【発明の実施形態】本発明のフィルタは、多孔基材の孔
部に吸着剤を有し、その吸着剤が繊維状のポリマーの多
数本を介して前記多孔基材に連結保持されたものであ
る。その例を図１に示した。１が多孔基材、２が吸着
剤、３が繊維状のポリマーである。BEST MODE FOR CARRYING OUT THE INVENTION The filter of the present invention has an adsorbent in the pores of a porous substrate, and the adsorbent is connected and held to the porous substrate through a large number of fibrous polymers. is there. An example is shown in FIG. 1 is a porous substrate, 2 is an adsorbent, and 3 is a fibrous polymer.
【０００８】本発明においては、吸着剤を繊維状のポリ
マーの多数本を介し多孔基材に連結保持する点を除いて
特に限定はない。従って、多孔基材や吸着剤やポリマー
としては適宜なものを用いることができ、公知物のいず
れも用いうる。[0008] In the present invention, there is no particular limitation except that the adsorbent is connected and held to the porous substrate through a large number of fibrous polymers. Accordingly, any suitable material can be used as the porous substrate, the adsorbent, or the polymer, and any of known materials can be used.
【０００９】ちなみに多孔基材としては、フィルタの使
用目的などに応じて紙やプラスチック、アルミ系、鉄
系、銅系等の金属やガラスの如き無機酸化物系、窒素系
等のセラミックなどの適宜な材質からなるものを用いう
る。また多孔形態も、例えば紙や不織布、布やネット、
穿孔処理の樹脂シートや金属板、発泡体や焼成体などの
如く、繊維の成形や穿孔処理、発泡や多孔焼成などの適
宜な多孔処理に基づく通気性ものであってよく、連通構
造であることが好ましい。The porous substrate may be made of paper, plastic, metal such as aluminum, iron, copper, etc., inorganic oxides such as glass, ceramics such as nitrogen, etc., depending on the purpose of use of the filter. Those made of various materials can be used. Also, the porous form is, for example, paper or nonwoven fabric, cloth or net,
It may be an air-permeable material such as a resin sheet or a metal plate of a perforation process, a foaming process, a perforation process such as a foaming process or a perforation process, such as foaming or perforation firing, such as a foamed body or a fired body. Is preferred.
【００１０】前記した紙の具体例としては、上質紙やア
ート紙、コート紙やグラシン紙の如き天然紙、ポリプロ
ピレン合成紙などがあげられる。また繊維やシートや発
泡体等を形成するプラスチックの具体例としては、ポリ
スチレンやポリ塩化ビニル、塩化ビニル・酢酸ビニル共
重合体やポリ酢酸ビニル、ポリビニルブチラールやポリ
ビニルホルマール、ポリビニルアセタールやポリ水酸化
ビニルの如きビニル系ポリマー、ポリエチレンテレフタ
レーやポリエチレンナフタレートの如きエステル系ポリ
マー、ポリメチルメタクリレートやポリアクリレートの
如きアクリル系ポリマー、エチルセルロースや酢酸セル
ロースの如きセルロース系ポリマー、ポリエチレンやポ
リプロピレンやその塩素化物、エチレン・酢酸ビニル共
重合体やエチレン・プロピレン共重合体の如きオレフィ
ン系ポリマー、スチレン・イソプレンゴムやスチレン・
イソプレン・スチレンゴム、スチレン・ブタジエンゴム
やスチレン・ブタジエン・スチレンゴム、スチレン・エ
チレン・ブタジエンゴムやスチレン・エチレン・ブチレ
ン・スチレンゴム、ニトリルゴムやブタジエンゴム、天
然ゴムやポリイソブチレン、ポリイソプレンやクロロプ
レンゴム、イソプレン・イソブチレンゴムやニトリルブ
チルゴム、スチレン・イソプレン・プロピレン・スチレ
ンゴムやエチレン・プロピレンターポリマーゴム、シリ
コーン系ゴムの如きゴム系ポリマーがあげられる。Specific examples of the above-mentioned paper include high-quality paper, art paper, natural paper such as coated paper and glassine paper, and polypropylene synthetic paper. Specific examples of plastics forming fibers, sheets, foams, etc. include polystyrene, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, polyvinyl acetate, polyvinyl butyral, polyvinyl formal, polyvinyl acetal, and polyvinyl hydroxide. Such as vinyl polymers, ester polymers such as polyethylene terephthalate and polyethylene naphthalate, acrylic polymers such as polymethyl methacrylate and polyacrylate, cellulosic polymers such as ethyl cellulose and cellulose acetate, polyethylene, polypropylene and chlorinated products thereof, and ethylene.・ Olefin polymers such as vinyl acetate copolymer and ethylene / propylene copolymer, styrene / isoprene rubber and styrene
Isoprene / styrene rubber, styrene / butadiene rubber / styrene / butadiene / styrene rubber, styrene / ethylene / butadiene rubber / styrene / ethylene / butylene / styrene rubber, nitrile rubber / butadiene rubber, natural rubber / polyisobutylene, polyisoprene / chloroprene rubber And rubber polymers such as isoprene / isobutylene rubber, nitrile butyl rubber, styrene / isoprene / propylene / styrene rubber, ethylene / propylene terpolymer rubber, and silicone rubber.
【００１１】またウレタン系ポリマーやポリアセター
ル、脂肪族系や芳香族系等の各種のアミド系ポリマー、
ポリスルホンやポリイミド、エポキシ系樹脂やポリエー
テルエーテルケトン、ポリエーテルスルホンやポリエー
テルイミド、ポリフェニレンスルファイドやポリアミド
イミド、ポリエステルイミドやポリパラバン酸、シリコ
ーン系ポリマーやフッ素系ポリマー、キシレン系ポリマ
ーやポリ塩化ビニリデン、ポリカーボネートやポリアリ
レート、あるいはエポキシアクリル系樹脂やウレタンア
クリル系樹脂、ポリエステルアクリル系樹脂やアクリル
酸エステル系樹脂、アルキッドアクリル系樹脂やシリコ
ーンアクリル系樹脂、ポリエン／ポリチオール型スピラ
ン系樹脂やアミノアルキッド系樹脂の如き紫外線硬化系
樹脂などもあげられる。Also, various amide polymers such as urethane polymers, polyacetals, aliphatic and aromatic polymers,
Polysulfone and polyimide, epoxy resin and polyetheretherketone, polyethersulfone and polyetherimide, polyphenylene sulfide and polyamideimide, polyesterimide and polyparabanic acid, silicone polymer and fluorine polymer, xylene polymer and polyvinylidene chloride, Polycarbonate, polyarylate, or epoxy acrylic resin, urethane acrylic resin, polyester acrylic resin, acrylate ester resin, alkyd acrylic resin, silicone acrylic resin, polyene / polythiol spirane resin, aminoalkyd resin UV-curable resins such as those described above.
【００１２】前記の繊維等を形成するプラスチックは、
２種以上であってもよい。また多孔基材は、紙やプラス
チックの如く材質の異なるものを適宜に組合せて、単層
物や複層物などの適宜な形態物として得ることができ、
その孔構造が任意に制御されたものであってよい。なお
多孔基材には、吸着剤を保持する繊維状ポリマーの密着
力の向上等を目的に必要に応じてアンカーコート処理や
コロナ処理、プラズマ処理やケミカルエッチング処理な
どの適宜な処理を施すこともできる。The plastic forming the fibers and the like is as follows:
Two or more types may be used. In addition, the porous base material can be obtained as an appropriate form such as a single-layered product or a multi-layered product by appropriately combining different materials such as paper and plastic,
The pore structure may be arbitrarily controlled. The porous substrate may be subjected to an appropriate treatment such as an anchor coat treatment, a corona treatment, a plasma treatment or a chemical etching treatment as necessary for the purpose of improving the adhesion of the fibrous polymer holding the adsorbent. it can.
【００１３】一方、吸着剤についても、例えば各種の活
性炭やアルミナゲル、シリカゲルや白土、トリポリ燐酸
二水素アルミニウムなどの適宜なものを用いることがで
き、脱臭や汚物除去などの吸着処理対象に応じた公知物
のいずれも用いうる。また吸着剤は、２種以上を併用す
ることもできる。吸着剤は、多孔基材の孔部への装填を
可能とするため多孔基材の孔径よりも小さい粒径のもの
が用いられる。吸着剤の好ましい粒径は、多孔基材の孔
部への充填性や孔内部で占める吸着剤の表面積の点など
より、多孔基材の平均孔径の１／２以下、就中１／５以
下、特に１／１０以下である。On the other hand, as the adsorbent, for example, various types of activated carbon, alumina gel, silica gel, clay, aluminum trihydrogen dihydrogen phosphate and the like can be used as appropriate, depending on the object of adsorption treatment such as deodorization and removal of dirt. Any of the known materials can be used. Further, two or more kinds of adsorbents can be used in combination. As the adsorbent, one having a particle size smaller than the pore size of the porous substrate is used in order to allow the porous substrate to be loaded into the pores. The preferred particle size of the adsorbent is 以下 or less, more preferably １ ／ or less, of the average pore diameter of the porous substrate from the viewpoint of the filling property of the pores in the porous substrate and the surface area of the adsorbent occupying inside the pores. , Especially 1/10 or less.
【００１４】他方、吸着剤を多孔基材の孔部に固定保持
するためのポリマーについても特に限定はなく、フィル
タの使用目的による物性などに応じて適宜なものを用い
ることができる。かかるポリマーの具体例としては、上
記の多孔基材の形成材料として例示したプラスチックな
どがあげられる。就中、フィルタの汎用性等の点より
は、ウレタン系ポリマーやポリビニルブチラール、ポリ
ビニルアセタールや酢酸セルロース、芳香族ポリアミド
やエポキシ系樹脂、ポリイミドなどが好ましく用いう
る。なお当該ポリマーは、２種以上をブレンドして用い
ることもできる。On the other hand, the polymer for fixing and holding the adsorbent in the pores of the porous substrate is also not particularly limited, and an appropriate polymer can be used according to the physical properties depending on the purpose of use of the filter. Specific examples of such a polymer include the plastics exemplified as the material for forming the porous substrate. Above all, urethane polymers, polyvinyl butyral, polyvinyl acetal, cellulose acetate, aromatic polyamides, epoxy resins, polyimides and the like can be preferably used from the viewpoint of versatility of the filter. The polymer may be used by blending two or more kinds.
【００１５】フィルタの形成は、例えば吸着剤混合のポ
リマー溶液を多孔基材に含浸させ、その含浸液に当該ポ
リマーの凝固用溶剤を噴霧方式等で供給して当該含浸液
を固化させる方法などにより行うことができる。すなわ
ち、ポリマーを溶剤に溶解させると共に吸着剤を添加し
て吸着剤混合のポリマー溶液とし、その溶液を多孔基材
に含浸させるか、溶液中に多孔基材を浸漬して多孔基材
の孔部に当該溶液を含浸させた後、その含浸液が溶剤を
含有して未乾燥の状態にある内に、含浸液にその溶剤と
は相溶性でポリマーは溶解しない凝固用溶剤を噴霧して
含浸液を固化させる方法などにより形成することができ
る。その場合、ポリマー用溶剤と凝固用溶剤の両方に可
溶な固体可塑剤等の添加剤を配合することもできる。The filter is formed, for example, by impregnating a porous substrate with a polymer solution mixed with an adsorbent, supplying a coagulating solvent for the polymer to the impregnating liquid by spraying or the like, and solidifying the impregnating liquid. It can be carried out. That is, a polymer solution is dissolved in a solvent and an adsorbent is added to form a polymer solution mixed with an adsorbent, and the solution is impregnated into a porous base material, or the porous base material is immersed in the solution to form pores in the porous base material. After the solution is impregnated, the impregnating solution contains a solvent and is in an undried state, and the impregnating solution is sprayed with a coagulating solvent that is compatible with the solvent and does not dissolve the polymer. Can be formed by a method of solidifying or the like. In this case, an additive such as a solid plasticizer that is soluble in both the solvent for the polymer and the solvent for coagulation may be blended.
【００１６】前記において凝固用溶剤を噴霧する段階
は、ポリマーの繊維状構造の制御性等の点より含浸液中
に溶剤が充分に残存する内が好ましい。含浸液中の溶剤
分が少ないと、ポリマーが塊状となって吸着剤の露出度
に乏しい場合がある。吸着剤を多孔基材に連結保持する
ポリマーの好ましい繊維状構造は、多数の微細繊維が多
数の微小な結節部を形成した状態で立体的に展開してな
る多孔構造である。In the above, the step of spraying the coagulating solvent is preferably performed while the solvent sufficiently remains in the impregnating liquid from the viewpoint of controllability of the fibrous structure of the polymer. If the amount of the solvent in the impregnating liquid is small, the polymer may be aggregated and the degree of exposure of the adsorbent may be poor. A preferable fibrous structure of the polymer that connects and holds the adsorbent to the porous substrate is a porous structure in which a large number of fine fibers are three-dimensionally developed in a state where a large number of fine nodules are formed.
【００１７】かかる多孔構造の形成に好ましい含浸液中
の溶剤の存在量は、吸着剤等の未溶解成分を除いた状態
に基づいて、例えば酢酸セルロースでは８０重量％以上
で、ポリメタフェニレンイソフタルアミドでは８５重量
％以上であり、さらにポリビニルブチラールやポリビニ
ルアセタールでは９２重量％以上であるなど、ポリマー
の種類や組成、構造や分子量等により異なるが、一般に
は前記した吸着剤等の未溶解成分を除いた状態に基づい
て、含浸液中に５０重量％以上、就中７０〜９９重量
％、特に８０〜９７重量％の溶剤が存在する段階で凝固
用溶剤を噴霧することが好ましい。従ってポリマー溶液
における未溶解成分を除いたポリマー濃度は、５０重量
％以下、就中１〜３０重量％、特に３〜２０重量％が好
ましい。The preferable amount of the solvent in the impregnating liquid for forming such a porous structure is, for example, 80% by weight or more for cellulose acetate, based on the state excluding undissolved components such as the adsorbent, and polymethphenylene isophthalamide. Is 85% by weight or more, and in polyvinyl butyral or polyvinyl acetal it is 92% by weight or more, but it depends on the type, composition, structure and molecular weight of the polymer. It is preferred to spray the coagulating solvent at a stage where 50% by weight or more, especially 70-99% by weight, particularly 80-97% by weight of the solvent is present in the impregnating liquid based on the state of the impregnating liquid. Therefore, the polymer concentration in the polymer solution excluding undissolved components is preferably 50% by weight or less, more preferably 1 to 30% by weight, particularly preferably 3 to 20% by weight.
【００１８】ポリマー溶液の含浸や凝固用溶剤の噴霧等
の処理温度は、適宜に決定でき一般には０〜８０℃、就
中０〜４０℃とされる。ポリマー溶液の粘土が低い場合
には低温化、就中０〜１０℃に低温化して溶液粘土を増
大させて含浸液の形成に供することが前記した多孔構造
の制御性等の点より好ましい。その場合には、含浸雰囲
気や凝固用溶剤の噴霧温度等も０〜１０℃等に低温化す
ることが好ましい。ポリマー溶液における吸着剤の含有
量は、フィルタへの目的とする吸着剤の導入量等に基づ
いて適宜に決定しうるが、一般にはポリマー１００重量
部あたり、１０〜２０００重量部、就中５０〜１０００
重量部、特に１００〜７００重量部の含有割合とされ
る。The treatment temperature for impregnation of the polymer solution, spraying of the coagulating solvent, etc. can be determined as appropriate and is generally 0 to 80 ° C, preferably 0 to 40 ° C. When the clay of the polymer solution is low, it is preferable to lower the temperature, particularly to 0 to 10 ° C. to increase the solution clay and to provide the impregnating liquid for the control of the porous structure as described above. In this case, it is preferable to lower the temperature of the impregnation atmosphere and the spraying temperature of the coagulating solvent to 0 to 10 ° C or the like. The content of the adsorbent in the polymer solution can be appropriately determined based on the amount of the target adsorbent introduced into the filter and the like. Generally, 10 to 2000 parts by weight, preferably 50 to 50 parts by weight, per 100 parts by weight of the polymer 1000
% By weight, especially 100 to 700 parts by weight.
【００１９】含浸液への凝固用溶剤の噴霧は、凝固用溶
剤の蒸気槽中に含浸処理した多孔基材を導入する方式
や、含浸処理した多孔基材上に凝固用溶剤をスプレーす
る方式などの、含浸液と凝固用溶剤の噴霧液とが接触す
る適宜な方式で行うことができる。凝固用溶剤の噴霧
は、含浸処理した多孔基材の形状等に応じて、片面や表
裏両面、基材周囲等の適宜な方位より行うことができ
る。凝固用溶剤の噴霧粒子の粒径は、多孔構造の微細化
などの点より５００μm以下、就中１００μm以下、特に
１０μm以下が好ましい。The method of spraying the coagulating solvent onto the impregnating liquid includes a method of introducing the impregnated porous base material into a coagulating solvent vapor tank and a method of spraying the coagulating solvent onto the impregnated porous base material. The method can be carried out by an appropriate method in which the impregnating liquid and the spray liquid of the coagulating solvent come into contact with each other. Spraying of the coagulating solvent can be performed in an appropriate orientation such as on one side, on both sides, or around the substrate, depending on the shape of the impregnated porous substrate. The particle size of the sprayed particles of the coagulating solvent is preferably 500 μm or less, more preferably 100 μm or less, particularly preferably 10 μm or less from the viewpoint of making the porous structure finer.
【００２０】多孔基材の含浸液に噴霧された凝固用溶剤
は、含浸液に接触して吸収され含浸液内の溶剤中に拡散
混和し、溶剤のポリマー溶解力を喪失させてポリマーを
凝固させ、かかる凝固現象が含浸液内部への凝固用溶剤
の拡散浸透と共に、含浸液の表面から内部へと進行す
る。一方、ポリマーの凝固で浸透が遮蔽された凝固用溶
剤混入の溶剤は、凝固ポリマーの隙間に溜り分子間凝集
力の作用で球状化し、この球状化も含浸液の表面から内
部へと進行する。The coagulating solvent sprayed on the impregnating liquid of the porous substrate is absorbed by contact with the impregnating liquid and diffused and mixed into the solvent in the impregnating liquid, causing the polymer to coagulate by losing the solvent dissolving power of the solvent. This coagulation phenomenon progresses from the surface of the impregnating liquid to the inside together with the diffusion and penetration of the coagulating solvent into the impregnating liquid. On the other hand, the solvent mixed with the coagulating solvent, the penetration of which is shielded by the coagulation of the polymer, accumulates in the gaps between the coagulated polymers and becomes spherical by the action of intermolecular cohesion.
【００２１】前記の球状化した凝固用溶剤混入の溶剤
は、その大きさがある程度に達したときに膨張圧が表面
張力を超えてはじけ含浸液内部の隣接球と連結し、かか
る連結現象が含浸液の内部へと進行する。その結果、多
数の微細繊維が多数の微小な結節部を形成しつつ立体的
に展開してなる状態の多孔層、すなわち多数の微細繊維
を種々の方向に派生する点（微小な結節部）が微小距離
で三次元空間に群在し、その点間を前記派生の多数の微
細繊維が連結する状態の連通構造の多孔層が形成され、
かつその場合に、多数の微細繊維が多孔基材に連結する
と共に、その微細繊維が多孔基材に連結する間に吸着剤
が当該微細繊維の多数と連結した状態で介在する構造が
形成される。When the size of the solvent mixed with the spheroidizing coagulating solvent reaches a certain level, the expansion pressure exceeds the surface tension, and the solvent is repelled and connected to adjacent spheres in the impregnating liquid. Proceeds into the liquid. As a result, a porous layer in a state in which many fine fibers are three-dimensionally expanded while forming many fine nodules, that is, a point (fine nodules) that derives many fine fibers in various directions. It is clustered in a three-dimensional space at a minute distance, and a porous layer of a communication structure in a state where a large number of the derived fine fibers are connected between the points is formed,
And in that case, a structure is formed in which a large number of fine fibers are connected to the porous substrate, and the adsorbent is interposed in a state of being connected to many of the fine fibers while the fine fibers are connected to the porous substrate. .
【００２２】前記の如くポリマーの凝固は、含浸液の表
面から内部へと進行することから、噴霧された凝固用溶
剤との接触時間を介して多孔層の形成厚さや構造等を制
御することができる。従って凝固用溶剤の噴霧時間は、
含浸液の状態や目的とするフィルタ厚などに応じて適宜
に決定しうるが、一般には５秒間〜２０分間程度とされ
る。Since the coagulation of the polymer proceeds from the surface of the impregnating liquid to the inside as described above, it is necessary to control the thickness and structure of the porous layer through the contact time with the sprayed coagulating solvent. it can. Therefore, the spraying time of the coagulating solvent is
Although it can be appropriately determined according to the state of the impregnating liquid, the desired filter thickness, and the like, it is generally about 5 seconds to 20 minutes.
【００２３】ポリマー用の溶剤としては、凝固用溶剤と
相溶性を示して凝固用溶剤との混合でポリマーを不溶化
する適宜なものを用いうる。一般には例えば、Ｎ−メチ
ル−２-ピロリドンやＮ，Ｎ−ジメチルアセトアミド、
Ｎ，Ｎ−ジメチルホルムアミドの如きアミド系溶剤、ヘ
キサンやヘプタン、シクロヘキサンやシクロヘプタン、
ベンゼンやトルエン、キシレンやアセトンの如き炭化水
素系溶剤などが用いられる。就中、多孔構造の制御性な
どの点よりＮ−メチル−２-ピロリドンやＮ，Ｎ−ジメ
チルアセトアミド、Ｎ，Ｎ−ジメチルホルムアミドやア
セトンなどが好ましく用いうる。As the solvent for the polymer, any suitable solvent which is compatible with the coagulating solvent and insolubilizes the polymer by mixing with the coagulating solvent may be used. Generally, for example, N-methyl-2-pyrrolidone, N, N-dimethylacetamide,
Amide solvents such as N, N-dimethylformamide, hexane and heptane, cyclohexane and cycloheptane,
Hydrocarbon solvents such as benzene, toluene, xylene and acetone are used. Among them, N-methyl-2-pyrrolidone, N, N-dimethylacetamide, N, N-dimethylformamide, acetone and the like can be preferably used from the viewpoint of controllability of the porous structure.
【００２４】ポリマー用の溶剤は、１種又は２種以上を
用いることができる。ポリマー溶液には、含浸状態の維
持性の向上等を目的とした増粘剤や、親水性の付与を目
的とした親水性付与剤、形成される吸着剤保持の繊維状
ポリマー（多孔層）の強度の向上、多孔構造の調節、耐
熱性の向上等を目的に、充填剤や酸化防止剤などの適宜
な添加剤や薬剤などを必要に応じて配合することができ
る。One or more solvents for the polymer can be used. The polymer solution contains a thickener for improving the maintenance of the impregnation state, a hydrophilicity-imparting agent for imparting hydrophilicity, and a fibrous polymer (porous layer) holding the adsorbent to be formed. For the purpose of improving the strength, adjusting the porous structure, improving the heat resistance, and the like, appropriate additives and chemicals such as fillers and antioxidants can be added as necessary.
【００２５】凝固用溶剤としては、ポリマー用溶剤とは
相溶性を示してポリマーは溶解しないものが用いられ
る。その種類については特に限定はない。一般にはポリ
マー用溶剤の種類に応じた極性溶剤の１種又は２種以上
が用いられる。その例としては、水、メタノールやエタ
ノール、プロパノールの如きアルコール類、エチレング
リコールやプロピレングリコールの如きグリコール類な
どがあげられる。As the coagulating solvent, a solvent which is compatible with the polymer solvent and does not dissolve the polymer is used. There is no particular limitation on the type. Generally, one or more polar solvents are used according to the type of the polymer solvent. Examples thereof include water, alcohols such as methanol, ethanol and propanol, and glycols such as ethylene glycol and propylene glycol.
【００２６】本発明においては、ポリビニルブチラール
やポリビニルアセタール、酢酸セルロースや芳香族ポリ
アミド、エポキシ系樹脂やポリイミドからなるポリマー
を、Ｎ−メチル−２-ピロリドンやＮ，Ｎ−ジメチルア
セトアミド、Ｎ，Ｎ−ジメチルホルムアミドからなる溶
剤で溶解した溶液の含浸液に、水を噴霧して形成した多
孔層がフィルタとしての特性などの点より特に好まし
い。In the present invention, a polymer comprising polyvinyl butyral, polyvinyl acetal, cellulose acetate, aromatic polyamide, epoxy resin or polyimide is converted to N-methyl-2-pyrrolidone, N, N-dimethylacetamide, N, N- A porous layer formed by spraying water onto an impregnating solution of a solution dissolved in a solvent composed of dimethylformamide is particularly preferable from the viewpoint of characteristics as a filter.
【００２７】凝固用溶剤の噴霧で形成された吸着剤固定
のポリマーの凝固層は、必要に応じ水等で洗浄して加熱
方式や真空方式等の適宜な方式で乾燥処理して目的とす
るフィルタ、すなわち吸着剤が繊維状のポリマーの多数
本を介して多孔基材に連結保持されたフィルタとされ
る。なおフィルタは、上記した含浸及びその多孔層化操
作を繰返して形成することもできる。また得られたフィ
ルタは、延伸処理や圧縮処理等によりその多孔構造を調
節することもできる。The solidified layer of the adsorbent-fixed polymer formed by spraying the coagulating solvent is washed with water or the like, if necessary, and dried by an appropriate method such as a heating method or a vacuum method to obtain a desired filter. That is, the filter is a filter in which the adsorbent is connected and held to the porous substrate through a large number of fibrous polymers. The filter can also be formed by repeating the above-described impregnation and porous layering operations. Moreover, the porous structure of the obtained filter can be adjusted by a stretching treatment, a compression treatment, or the like.
【００２８】汚水処理等を目的としたフィルタでは、強
度や汚水の浸透性等の点より繊維状ポリマーが形成する
多孔層に占める孔の容積率（気孔率）が４０〜９５％、
就中４５〜９０％であることが好ましい。特に、その気
孔率で立体スケルトン状の多孔構造を有するものが好ま
しく、その場合に全孔が連通構造にあるものがより好ま
しい。In a filter intended for sewage treatment or the like, the volume ratio (porosity) of pores in the porous layer formed by the fibrous polymer is 40 to 95% in terms of strength, sewage permeability and the like.
In particular, it is preferably 45 to 90%. In particular, those having a three-dimensional skeleton-like porous structure at the porosity are preferable, and in this case, those having all holes in a communicating structure are more preferable.
【００２９】吸着剤を保持した状態でのフィルタの孔径
は、使用目的等に応じて適宜に決定でき、一般には通気
性や液透過性などの点より０．０１〜１００μm、就中
０．０５〜５０μm、特に０．１〜１０μmが好ましい。
なおフィルタの厚さは、その使用目的などに応じて適宜
に決定してよく、１μm厚以下の薄物や５０mm厚以上の
厚物の形成も可能である。The pore size of the filter holding the adsorbent can be appropriately determined according to the purpose of use and the like, and is generally 0.01 to 100 μm, preferably 0.05 to 100 μm, in view of air permeability and liquid permeability. To 50 μm, particularly preferably 0.1 to 10 μm.
The thickness of the filter may be appropriately determined according to the purpose of use, and a thin material having a thickness of 1 μm or less or a thickness of 50 mm or more can be formed.
【００３０】なおフィルタの実用に際しては、必要に応
じて粘着層を設けることもできる。その粘着層の形成に
は、例えばゴム系やアクリル系、シリコーン系やビニル
アルキルエーテル系、ポリビニルアルコール系やポリビ
ニルピロリドン系、ポリアクリルアミド系やセルロース
系などの適宜な粘着剤を用いうる。粘着層は、被着体へ
の取付けなどを目的とし、点状や繊維状等で付設した多
孔構造層とすることもできる。When the filter is put into practical use, an adhesive layer may be provided if necessary. For forming the adhesive layer, for example, an appropriate adhesive such as rubber, acrylic, silicone, vinylalkyl ether, polyvinyl alcohol, polyvinylpyrrolidone, polyacrylamide, or cellulose can be used. The adhesive layer may be a porous layer provided in the form of dots or fibers for the purpose of attachment to an adherend or the like.
【００３１】本発明のフィルタは、上記した如く吸着剤
が繊維状のポリマーの多数本を介して多孔基材に連結保
持されているので、吸着剤の露出度が大きく吸着能に優
れている。従って、使用目的に応じた種々の吸着剤を固
定できることと共に、脱臭等のガス処理や汚水等の液体
処理などの種々の用途に用いることができる。その場
合、フィルタの形態は、例えば長尺や単品や打抜き等の
シート形態、チップ状等の詰物形態、所定形状への成形
形態などの任意な形態とすることができる。As described above, the adsorbent of the present invention is connected to and held by the porous base material through a large number of fibrous polymers, so that the degree of exposure of the adsorbent is large and the adsorbability is excellent. Accordingly, various adsorbents can be fixed according to the purpose of use, and can be used for various purposes such as gas treatment such as deodorization and liquid treatment such as sewage. In this case, the form of the filter may be any form such as a long form, a single form, a sheet form such as punching, a filling form such as a chip form, and a form form into a predetermined shape.
【００３２】[0032]
実施例１ ポリビニルアセタール１００部（重量部、以下同じ）を
Ｎ，Ｎ−ジメチルホルムアミド１６００部に溶解させ、
そのポリマー溶液に８０〜１５０メッシュの活性炭３０
０部を混合してそれを、セル数１３個／インチ（連続気
泡）、厚さ５mmのポリウレタンフォームに含浸させたの
ち垂直に保持して１５分間、市販の加湿器を介し噴霧水
を両面より供給し、８０℃で１時間乾燥させてフィルタ
を得た。このフィルタを切断して断面を観察したとこ
ろ、吸着剤が繊維状のポリマーの多数本を介してポリウ
レタンフォームの孔内に連結保持されたものであった。Example 1 100 parts (parts by weight, hereinafter the same) of polyvinyl acetal were dissolved in 1600 parts of N, N-dimethylformamide,
80-150 mesh activated carbon 30 in the polymer solution
0 parts were mixed and impregnated with a 13-cell / inch (open cell), 5 mm-thick polyurethane foam, held vertically, and sprayed with water from both sides through a commercially available humidifier for 15 minutes. The filter was supplied and dried at 80 ° C. for 1 hour to obtain a filter. When this filter was cut and its cross section was observed, it was found that the adsorbent was connected and held in the pores of the polyurethane foam via many fibrous polymers.
【００３３】比較例 噴霧水による処理なしに含浸物をそのまま８０℃で１時
間乾燥させるほかは実施例１に準じてフィルタを得た。
このフィルタを切断して断面を観察したところ、吸着剤
がポリマー膜を介してポリウレタンフォームの孔の内壁
に接着されたものであった。Comparative Example A filter was obtained in the same manner as in Example 1 except that the impregnated material was dried at 80 ° C. for 1 hour without treatment with spray water.
When this filter was cut and its cross section was observed, it was found that the adsorbent had adhered to the inner wall of the pores of the polyurethane foam via the polymer film.
【００３４】上記の実施例１、比較例で得たフィルタの
有効表面積を比表面積測定装置にて調べた。その結果、
実施例１では６０％、比較例では２０％であった。The effective surface areas of the filters obtained in Example 1 and Comparative Example were examined using a specific surface area measuring device. as a result,
It was 60% in Example 1 and 20% in Comparative Example.
【図１】実施例の断面説明図FIG. 1 is an explanatory sectional view of an embodiment.
１：多孔基材 ２：吸着剤 ３：繊維状のポリマー 1: porous substrate 2: adsorbent 3: fibrous polymer
Claims (1)
着剤が繊維状のポリマーの多数本を介して前記多孔基材
に連結保持されてなることを特徴とするフィルタ。1. A filter comprising a porous substrate having an adsorbent in pores thereof, wherein the adsorbent is connected and held to the porous substrate through a large number of fibrous polymers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9108256A JPH10277332A (en) | 1997-04-09 | 1997-04-09 | Filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9108256A JPH10277332A (en) | 1997-04-09 | 1997-04-09 | Filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10277332A true JPH10277332A (en) | 1998-10-20 |
Family
ID=14480051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9108256A Pending JPH10277332A (en) | 1997-04-09 | 1997-04-09 | Filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10277332A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005056175A1 (en) * | 2003-12-15 | 2005-06-23 | Asahi Kasei Chemicals Corporation | Porous formed article and method for production thereof |
| WO2018216861A1 (en) * | 2017-05-25 | 2018-11-29 | (주) 영산에어로웰피터 | Method for manufacturing air purifying filter impregnated with cellulose and/or powder activated carbon |
-
1997
- 1997-04-09 JP JP9108256A patent/JPH10277332A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005056175A1 (en) * | 2003-12-15 | 2005-06-23 | Asahi Kasei Chemicals Corporation | Porous formed article and method for production thereof |
| JPWO2005056175A1 (en) * | 2003-12-15 | 2007-07-05 | 旭化成ケミカルズ株式会社 | Porous molded body and method for producing the same |
| KR100804360B1 (en) * | 2003-12-15 | 2008-02-15 | 아사히 가세이 케미칼즈 가부시키가이샤 | Porous formed article and method for production thereof |
| JP4671419B2 (en) * | 2003-12-15 | 2011-04-20 | 旭化成ケミカルズ株式会社 | Porous molded body and method for producing the same |
| US8597778B2 (en) | 2003-12-15 | 2013-12-03 | Asahi Kasei Chemicals Corporation | Porous formed article and method for production thereof |
| WO2018216861A1 (en) * | 2017-05-25 | 2018-11-29 | (주) 영산에어로웰피터 | Method for manufacturing air purifying filter impregnated with cellulose and/or powder activated carbon |
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