JP3229115B2 - Filter media for liquid - Google Patents
Filter media for liquidInfo
- Publication number
- JP3229115B2 JP3229115B2 JP06659994A JP6659994A JP3229115B2 JP 3229115 B2 JP3229115 B2 JP 3229115B2 JP 06659994 A JP06659994 A JP 06659994A JP 6659994 A JP6659994 A JP 6659994A JP 3229115 B2 JP3229115 B2 JP 3229115B2
- Authority
- JP
- Japan
- Prior art keywords
- filter medium
- filter
- liquid
- dehydration
- water
- 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.)
- Expired - Fee Related
Links
Landscapes
- Filtering Materials (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は液体用濾材に関し、とく
に微粒子を吸着する化合物を結合した液体用濾材に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter medium for liquid, and more particularly to a filter medium for liquid to which a compound which adsorbs fine particles is bound .
【０００２】[0002]
【従来の技術】液体用濾材には、編織布、不織布、紙、
糸などの濾材が用いられている。これらの濾材は、例え
ば、多孔性コアに巻回積層することによりディプス型カ
ートリッジフィルタとしたり、プリーツ加工したものを
多孔性コアに巻回することによりプリーツ型カートリッ
ジフィルタとして用いられている。上記液体用濾材で
は、開孔径を小さくすることにより塵埃などの粒子の通
過を阻止して濾過効率を高めることができるが、捕捉で
きる粒子の大きさには限度があり、また、開孔径を小さ
くすると目詰りが起きやすくなるという問題があった。2. Description of the Related Art Filter media for liquids include woven fabrics, nonwoven fabrics, paper,
A filter medium such as a thread is used. These filter media are used, for example, as a depth type cartridge filter by winding and laminating on a porous core, or as a pleated type cartridge filter by winding a pleated product around a porous core. In the above-mentioned liquid filter medium, the filtration efficiency can be improved by preventing the passage of particles such as dust by reducing the opening diameter, but the size of the particles that can be captured is limited, and the opening diameter is reduced. Then, there is a problem that clogging is likely to occur.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上記従来技術
の欠点を解消すべくなされたものであり、濾材の開孔径
よりも小さな微粒子の捕集を可能とすると共に、目詰り
の起きにくい濾材を得ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and enables the collection of fine particles smaller than the opening diameter of the filter medium and the filter medium which does not easily cause clogging. The purpose is to obtain.
【０００４】[0004]
【課題を解決するための手段】上記の課題を解決するた
めに、請求項１に記載の発明は、「開孔径９〜７０μｍ
を有する濾材に次式Means for Solving the Problems To solve the above-mentioned problems, the invention according to claim 1 is directed to an "opening diameter of 9 to 70 μm".
The following formula
【化２】（式中、Ｒ1は炭素数１〜２２のアルキル基、
Ｒ2は炭素数１〜４のアルキル基、Ｘはハロゲン原子、
ａは０または１を表す）で表されるオルガノシラン化合
物を脱水縮合せしめて形成した脱水縮合化合物が、濾材
重量に対して０．１〜０．２重量％結合していることを
特徴とする、開孔径よりも小さな微粒子の捕集を目的と
した液体用濾材」をその要旨とする。Wherein R 1 is an alkyl group having 1 to 22 carbon atoms,
R 2 is an alkyl group having 1 to 4 carbon atoms, X is a halogen atom,
a represents 0 or 1), wherein a dehydration-condensation compound formed by dehydration-condensation of an organosilane compound represented by the formula (1) is bound by 0.1 to 0.2% by weight based on the weight of the filter medium. And a liquid filter medium for collecting fine particles smaller than the opening diameter. "
【０００５】すなわち、本発明の液体用濾材には、前記
のオルガノシラン化合物を脱水縮合反応せしめて形成し
た脱水縮合化合物が結合しているため、粒子を強く吸着
できる四級化された窒素が表面積の大きな濾材の表面に
存在しており、濾材の開孔による物理的な粒子の捕集に
加えて、イオン的な粒子の吸着が利用できる。このた
め、本発明の濾材では開孔径を小さくしなくても微粒子
が捕集でき、目詰りしにくく、長寿命で捕集効率に優れ
ている。また、上記の脱水縮合化合物は水に不溶である
ため、使用中に溶出したり、剥がれたりする心配がな
い。That is, since the dehydration-condensation compound formed by subjecting the organosilane compound to dehydration-condensation reaction is bonded to the liquid filter medium of the present invention, quaternized nitrogen capable of strongly adsorbing particles has surface area. Exists on the surface of a filter medium having a large particle size, and in addition to the physical collection of particles by the opening of the filter medium, adsorption of ionic particles can be used. For this reason, in the filter medium of the present invention, the fine particles can be collected without reducing the opening diameter, the clogging is hard to occur, the life is long, and the collection efficiency is excellent. Further, since the above dehydration-condensation compound is insoluble in water, there is no fear of elution or peeling during use.
【０００６】本発明には、前記化２に示すオルガノシラ
ン化合物が使用される。このオルガノシラン化合物は水
の存在下で、アルコキシ基の加水分解および脱メタノー
ル反応によりシラノール基を形成し、オルガノシラン化
合物どうしの脱水縮合反応によりシロキサン結合を行い
脱水縮合化合物を形成する。また、この脱水縮合化合物
はオルガノシラン化合物と濾材表面との間での脱水縮合
反応や、オルガノシラン化合物の四級化された窒素のカ
チオンによるイオン結合などにより濾材表面に強固に結
合する。このようなオルガノシラン化合物としては、例
えば３−（トリメトキシシリル）プロピルオクタデシル
ジメチルアンモニウムクロライドや３−（トリメトキシ
シリル）プロピルヘキサデシルジメチルアンモニウムク
ロライドなどが好適に用いられる。なお、前記のオルガ
ノシラン化合物は炭素数１０〜１８のモノエチレン脂肪
酸との錯体として用いてもよい。In the present invention, an organosilane compound represented by Chemical Formula 2 is used. In the presence of water, the organosilane compound forms a silanol group by hydrolysis of an alkoxy group and a methanol removal reaction, and forms a siloxane bond by a dehydration condensation reaction between the organosilane compounds to form a dehydration condensation compound. The dehydration-condensation compound is firmly bonded to the surface of the filter medium by a dehydration-condensation reaction between the organosilane compound and the surface of the filter medium, or by ionic bonding of quaternized nitrogen of the organosilane compound with cations. As such an organosilane compound, for example, 3- (trimethoxysilyl) propyloctadecyldimethylammonium chloride and 3- (trimethoxysilyl) propylhexadecyldimethylammonium chloride are preferably used. The above-mentioned organosilane compound may be used as a complex with monoethylene fatty acid having 10 to 18 carbon atoms.
【０００７】前記のオルガノシラン化合物は、例えばメ
タノール、エタノール、イソプロパノールなどのアルコ
ール溶液、アルコールと相溶性のある有機溶剤との混合
溶液、または水とアルコールとの混合溶液にして濾材に
付与される。オルガノシラン化合物の溶液濃度は０．０
５〜５重量％とするのがよく、０．０５重量％未満では
十分な微粒子の吸着能力が得られない場合があり、５重
量％を超えると濾材に均一に付着させることが難しくな
る。この溶液の濾材への付与は、例えば、含浸、スプレ
ー、プリント、コーティング、塗布などによって行われ
るが、とくに溶液中に濾材を漬けることによって溶液を
濾材に含浸するのがよい。The organosilane compound is applied to the filter medium in the form of an alcohol solution such as methanol, ethanol or isopropanol, a mixed solution of an organic solvent compatible with alcohol, or a mixed solution of water and alcohol. The solution concentration of the organosilane compound is 0.0
The content is preferably 5 to 5% by weight. If the content is less than 0.05% by weight, a sufficient ability to adsorb fine particles may not be obtained. If the content is more than 5% by weight, it is difficult to uniformly adhere to the filter medium. The application of the solution to the filter medium is performed by, for example, impregnation, spraying, printing, coating, coating, or the like. It is particularly preferable that the filter medium is impregnated with the solution by immersing the filter medium in the solution.
【０００８】前記のオルガノシラン化合物は水の存在下
で、アルコキシ基の加水分解および脱メタノール反応に
よりシラノール基を形成する。このため、より均一に濾
材に前記オルガノシラン化合物の脱水縮合化合物を付着
させるためには、前記のオルガノシラン化合物を水とア
ルコールとの混合溶媒に溶解した混合溶液を用いること
が望ましい。The above-mentioned organosilane compound forms a silanol group by hydrolysis of an alkoxy group and a methanol removal reaction in the presence of water. Therefore, in order to more uniformly adhere the dehydration-condensation compound of the organosilane compound to the filter medium, it is desirable to use a mixed solution in which the organosilane compound is dissolved in a mixed solvent of water and alcohol.
【０００９】次いで、乾燥などにより溶媒を蒸発させる
ことによって、オルガノシラン化合物のシラノール基ど
うしを脱水縮合反応させてシロキサン結合を行って脱水
縮合化合物を形成すると共に、この脱水縮合化合物を濾
材表面に強固に結合する。脱水縮合化合物の濾材表面へ
の結合は、シラノール基と濾材表面との脱水縮合反応
か、四級化された窒素のカチオン性によるイオン結合
か、あるいはその両者によるものと考えられる。Next, by evaporating the solvent by drying or the like, the silanol groups of the organosilane compound are dehydrated and condensed to form a siloxane bond, thereby forming a dehydrated condensate compound. To join. The binding of the dehydration-condensation compound to the surface of the filter medium is considered to be due to a dehydration-condensation reaction between a silanol group and the surface of the filter medium, an ionic bond of quaternized nitrogen due to cationic property, or both.
【００１０】本発明の濾材には、前記のオルガノシラン
化合物を脱水縮合反応せしめて形成した脱水縮合化合物
が結合している。このため、表面積の大きな濾材の表面
に微粒子をイオン的に吸着する能力を持つ四級化された
窒素が広く分布しており、捕集すべき粒子との接触機会
が高まるため微粒子を効率よく吸着できる。また、前述
したようにオルガノシラン化合物からなる脱水縮合化合
物が水に不溶で濾材表面に強固に結合していて、処理液
中に溶け出したり、濾材から脱落することがないため、
環境を汚染する心配がなく、安全性も高い。[0010] medium of the present invention, dehydration condensation compounds of the organosilane compound formed allowed dehydration condensation reaction is bound. For this reason, quaternized nitrogen, which has the ability to adsorb fine particles ionically, is widely distributed on the surface of the filter medium having a large surface area, and the chance of contact with the particles to be collected is increased, so that the fine particles are efficiently adsorbed. it can. Also, as described above, the dehydration-condensation compound consisting of the organosilane compound is insoluble in water and is firmly bonded to the surface of the filter medium, so that it does not dissolve in the treatment liquid or drop off from the filter medium.
There is no concern about polluting the environment and the safety is high.
【００１１】なお、前記のオルガノシラン化合物を脱水
縮合反応せしめて形成した脱水縮合化合物の付着量は、
濾材重量に対して０．０５〜５重量％であることが望ま
しく、これより付着量が少ないと十分な微粒子の吸着力
が得られず、捕集能力が低下し、これより付着量が多い
と濾材の目詰りが生じやすくなる。とくに好ましい付着
量の範囲は、濾材重量に対して０．１〜１重量％であ
る。The amount of the dehydration-condensation compound formed by subjecting the organosilane compound to a dehydration-condensation reaction is as follows:
It is desirable that the amount is 0.05 to 5% by weight based on the weight of the filter medium. If the amount is smaller than this, sufficient adsorption force of fine particles cannot be obtained, and the collecting ability is reduced. Clogging of the filter medium is likely to occur. A particularly preferable range of the adhesion amount is 0.1 to 1% by weight based on the weight of the filter medium.
【００１２】本発明に使用する濾材はとくに限定され
ず、従来公知のものが使用でき、例えば織布、編布、不
織布、紙、糸、網などを単独又は組合せたものが使用で
きる。とくに、好ましい濾材は、メルトブロー不織布な
どの比較的緻密なもので、これにオルガノシラン化合物
を脱水縮合反応せしめて形成した脱水縮合化合物を結合
させることにより、従来通水抵抗や濾過寿命を犠牲にし
なければ捕集が困難であった微粒子の捕集が可能とな
る。ただし、用途に応じて目の粗い濾材も使用できる。The filter medium used in the present invention is not particularly limited, and conventionally known ones can be used. For example, woven cloth, knitted cloth, non-woven cloth, paper, thread, net, etc. can be used alone or in combination. Particularly, preferred filter medium, a relatively dense, such as melt-blown nonwoven fabric, to which by making organosilane compounds coupled <br/> dehydration condensation compound formed by allowed dehydration condensation reaction, a conventional water-pass resistance and filter life It becomes possible to collect the fine particles, which were difficult to collect without sacrificing the fine particles. However, a coarse filter medium can be used depending on the application.
【００１３】本発明の液体用濾材はどのような液体フィ
ルタにも使用できるが、とくにディプス型カートリッジ
フィルタやプリーツ型カートリッジフィルタに適してい
る。例えば、異なる孔径の濾材を巻回積層して使用する
カートリッジフィルタの場合に、メインフィルタとなる
孔径の小さな濾材にオルガノシラン化合物を脱水縮合反
応せしめて形成した脱水縮合化合物を結合させた濾材を
用いれば、効率よく、処理液中の塵埃などの粒子を取り
除くことができる。 Although the liquid filter medium of the present invention can be used for any liquid filter, it is particularly suitable for a depth type cartridge filter and a pleated type cartridge filter. For example, in the case of a cartridge filter for use filter media different pore sizes are laminated winding, the use of a filter medium bound with dehydration condensation compound an organosilane compound formed allowed dehydration condensation reaction in a small filter medium pore size comprising a main filter Thus, particles such as dust in the processing liquid can be efficiently removed .
【００１４】[0014]
【実施例】実施例１ メルトブロー法により、下記、表１に示す濾材番号１〜
８の平均孔径の異なる目付８０ｇ／ｍ2 の８種類のポリ
プロピレン製メルトブロー不織布を作製した。一方、３
−（トリメトキシシリル）プロピルオクタデシルジメチ
ルアンモニウムクロライドの５０％メタノール溶液を水
に加えた後、更にエタノールで希釈して０．２重量％水
／アルコール混合溶液を得た。この溶液を表１の濾材番
号１〜８のメルトブロー不織布に、各々固形分の付着量
が不織布重量に対して０．２重量％になるように付着さ
せた後、乾燥して、３−（トリメトキシシリル）プロピ
ルオクタデシルジメチルアンモニウムクロライドが脱水
縮合反応して形成された脱水縮合化合物が結合した液体
用濾材を得た。これらの液体用濾材を濾材番号の小さい
方から順に多孔性コアに巻回積層して、内径３ｃｍ、外
径６．４ｃｍ、長さ２５ｃｍのカートリッジフィルタを
作製した。EXAMPLES Example 1 Filter media Nos. 1 to 1 shown in Table 1 below were prepared by the melt blow method.
Eight types of polypropylene melt-blown nonwoven fabrics having a basis weight of 80 g / m @ 2 and different average pore sizes were prepared. Meanwhile, 3
A 50% methanol solution of-(trimethoxysilyl) propyloctadecyldimethylammonium chloride was added to water, and further diluted with ethanol to obtain a 0.2% by weight water / alcohol mixed solution. This solution was applied to each of the melt-blown nonwoven fabrics of filter media Nos. 1 to 8 in Table 1 so that the solid content was 0.2% by weight based on the weight of the nonwoven fabric, and then dried to obtain 3- (tri trimethoxysilyl) propyl octadecyl dimethyl ammonium chloride was obtained filter medium for liquid bound dehydration condensation compound formed by dehydration condensation reaction. These filter media for liquid were wound and laminated on a porous core in ascending order of the filter media number to prepare a cartridge filter having an inner diameter of 3 cm, an outer diameter of 6.4 cm, and a length of 25 cm.
【００１５】[0015]
【表１】 [Table 1]
【００１６】実施例２ ３−（トリメトキシシリル）プロピルヘキサデシルジメ
チルアンモニウムクロライドの５０％メタノール溶液を
水に加えた後、更にエタノールで希釈して０．２重量％
水／アルコール混合溶液を得た。この溶液を表１の濾材
番号１〜８のメルトブロー不織布に、各々固形分の付着
量が不織布重量に対して０．２重量％になるように付着
させた後、乾燥して、３−（トリメトキシシリル）プロ
ピルヘキサデシルジメチルアンモニウムクロライドが脱
水縮合反応して形成された脱水縮合化合物が結合した液
体用濾材を得た。これらの液体用濾材を濾材番号の小さ
い方から順に多孔性コアに巻回積層して、内径３ｃｍ、
外径６．４ｃｍ、長さ２５ｃｍのカートリッジフィルタ
を作製した。Example 2 A 50% methanol solution of 3- (trimethoxysilyl) propylhexadecyldimethylammonium chloride was added to water, and further diluted with ethanol to obtain 0.2% by weight.
A water / alcohol mixed solution was obtained. This solution was applied to each of the melt-blown nonwoven fabrics of filter media Nos. 1 to 8 in Table 1 so that the solid content was 0.2% by weight based on the weight of the nonwoven fabric, and then dried to obtain 3- (tri trimethoxysilyl) propyl hexadecyl dimethyl ammonium chloride to obtain a filter medium for liquid bound dehydration condensation compound formed by dehydration condensation reaction. These liquid filter media are wound and laminated on a porous core in ascending order of the filter media number, and have an inner diameter of 3 cm,
A cartridge filter having an outer diameter of 6.4 cm and a length of 25 cm was prepared.
【００１７】比較例１ 表１に示す濾材１〜８を、濾材番号の小さい方から順に
多孔性コアに巻回積層して、内径３ｃｍ、外径６．４ｃ
ｍ、長さ２５ｃｍのカートリッジフィルタを作製した。Comparative Example 1 Filter media 1 to 8 shown in Table 1 were wound and laminated on a porous core in ascending order of the filter media number, and the inner diameter was 3 cm and the outer diameter was 6.4c.
m, a cartridge filter having a length of 25 cm was prepared.
【００１８】比較例２ ステアリルトリメチルアンモニウムクロライドの１％水
溶液を表１の濾材番号１〜８のメルトブロー不織布に、
各々固形分の付着量が不織布重量に対して１重量％にな
るように付着させた後、乾燥して、液体用濾材を得た。
これらの液体用濾材を濾材番号の小さい方から順に多孔
性コアに巻回積層して、内径３ｃｍ、外径６．４ｃｍ、
長さ２５ｃｍのカートリッジフィルタを作製した。Comparative Example 2 A 1% aqueous solution of stearyltrimethylammonium chloride was applied to the melt-blown nonwoven fabrics of filter media Nos. 1 to 8 in Table 1.
Each of the solid contents was attached so that the attached amount was 1% by weight based on the weight of the nonwoven fabric, and then dried to obtain a filter medium for liquid.
These liquid filter media are wound and laminated on a porous core in ascending order of the filter media number, and the inner diameter is 3 cm, the outer diameter is 6.4 cm,
A cartridge filter having a length of 25 cm was prepared.
【００１９】実験１ 得られたカートリッジフィルタの通水抵抗、濾過寿命、
捕集効率を下記の方法で調べ、通水抵抗と濾過寿命とを
表２に、捕集効率を表３に示した。Experiment 1 Water resistance, filtration life,
The collection efficiency was examined by the following method, and the water flow resistance and the filtration life were shown in Table 2, and the collection efficiency was shown in Table 3.
【００２０】（通水抵抗）水をカートリッジフィルタに
液量２５リットル／分で通水した時の初期圧力損失を測
定し、通水抵抗とした。(Water flow resistance) The initial pressure loss when water was passed through the cartridge filter at a liquid volume of 25 liters / minute was measured and defined as water flow resistance.
【００２１】（濾過寿命）ＪＩＳ１１種の塵埃を水に分
散した濃度１０ｐｐｍの試験液を均一に攪拌しながら、
カートリッジフィルタに流量２５リットル／分で通水し
て、圧力損失を測定し、初期圧力との差圧が２．０ｋｇ
／ｃｍ2 になるまでに処理された総通水量を測定し、こ
れを濾過寿命とした。(Filtration Life) While uniformly stirring a test solution having a concentration of 10 ppm in which JIS type 11 dust is dispersed in water,
Water is passed through the cartridge filter at a flow rate of 25 liters / minute, the pressure loss is measured, and the differential pressure from the initial pressure is 2.0 kg.
/ Cm 2 was measured, and this was defined as the filtration life.
【００２２】（捕集効率）ＪＩＳ１１種の塵埃を水に分
散した濃度１０ｐｐｍの試験液を均一に攪拌しながら、
カートリッジフィルタに流量２５リットル／分で通水し
て、通水開始１分後の濾液を採取し、この濾液及び濾過
前の試験液に含まれる粒子数を粒度分布測定機を用いて
各粒径別に計測し、それぞれの粒径における捕集効率を
下記式により求めた。 捕集効率（％）＝（Ａ−Ｂ）×１００／Ａ ただし、Ａは濾過前の試験液に含まれる粒子数、Ｂは濾
液に含まれる粒子数。(Collection efficiency) While uniformly stirring a test solution having a concentration of 10 ppm in which JIS type 11 dust is dispersed in water,
Water was passed through the cartridge filter at a flow rate of 25 liters / minute, and the filtrate one minute after the start of water flow was collected. The number of particles contained in this filtrate and the test solution before filtration was determined using a particle size distribution analyzer. The measurement was performed separately, and the collection efficiency at each particle size was determined by the following equation. Collection efficiency (%) = (AB) × 100 / A where A is the number of particles contained in the test solution before filtration, and B is the number of particles contained in the filtrate.
【００２３】[0023]
【表２】 [Table 2]
【００２４】[0024]
【表３】 [Table 3]
【００２５】実験２ 実施例１、２及び比較例２で製作したカートリッジフィ
ルタに、水を流速２５リットル／分で１０分間通して水
洗した後に、捕集効率を測定し、粒径０．４〜０．５μ
ｍの粒子の捕集効率を水洗前の実験１で行った捕集効率
と比較して表４に示した。表４から明らかなように、実
施例１、２では捕集効率の低下はほとんど見られず、耐
久性に優れていたが、比較例２ではステアリルトリメチ
ルアンモニウムクロライドが洗い流されて大幅に捕集効
率が低下したことがわかる。Experiment 2 Water was passed through the cartridge filters manufactured in Examples 1 and 2 and Comparative Example 2 at a flow rate of 25 L / min for 10 minutes to wash the water, and the collection efficiency was measured. 0.5μ
Table 4 shows the collection efficiency of particles of m in comparison with the collection efficiency performed in Experiment 1 before washing. As is clear from Table 4, in Examples 1 and 2, there was almost no decrease in the collection efficiency, and the durability was excellent. In Comparative Example 2, however, the stearyl trimethylammonium chloride was washed away and the collection efficiency was greatly reduced. It can be seen that has decreased.
【００２６】[0026]
【表４】 [Table 4]
【００２７】[0027]
【発明の効果】本発明の液体用濾材では、前述したオル
ガノシラン化合物を脱水縮合反応せしめて形成した脱水
縮合化合物が結合しているため、帯電した粒子を強く吸
着できる四級化された窒素が表面積の大きな濾材の表面
に存在しており、濾材の開孔による物理的な粒子の捕集
に加えて、イオン的な粒子の吸着が利用できる。このた
め、本発明の液体用濾材では開孔径を小さくしなくても
微粒子が捕集でき、目詰りしにくく、長寿命で捕集効率
に優れている。また、本発明の液体用濾材では、脱水縮
合化合物が水に不溶で濾材表面に強固に結合しているた
め、処理液中に溶け出したり、濾材から脱落することが
ないため、環境を汚染する心配がなく、安全性が高い。 According to the filter medium for liquid of the present invention, since the dehydration condensation compound formed by subjecting the above-mentioned organosilane compound to the dehydration condensation reaction is bonded, quaternized nitrogen capable of strongly adsorbing charged particles is removed. It is present on the surface of a filter medium having a large surface area, and can utilize ionic particle adsorption in addition to physical collection of particles by opening of the filter medium. For this reason, in the liquid filter medium of the present invention, fine particles can be collected without reducing the opening diameter, clogging is hardly performed, and a long life and excellent collection efficiency are obtained. Further, in the liquid filter medium of the present invention, since the dehydration condensation compound is insoluble in water and strongly bonded to the surface of the filter medium, it does not dissolve in the treatment liquid or drop off from the filter medium, thus polluting the environment. No worries, high safety.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 39/00 - 39/20 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 7 , DB name) B01D 39/00-39/20
Claims (1)
Ｒ2は炭素数１〜４のアルキル基、Ｘはハロゲン原子、
ａは０または１を表す）で表されるオルガノシラン化合
物を脱水縮合反応せしめて形成した脱水縮合化合物が、
濾材重量に対して０．１〜０．２重量％結合しているこ
とを特徴とする、開孔径よりも小さな微粒子の捕集を目
的とした液体用濾材。A filter medium having an opening diameter of 9 to 70 μm is represented by the following formula: wherein R 1 is an alkyl group having 1 to 22 carbon atoms,
R 2 is an alkyl group having 1 to 4 carbon atoms, X is a halogen atom,
a represents 0 or 1) is a dehydration-condensation compound formed by subjecting an organosilane compound represented by
A liquid filter medium for collecting fine particles smaller than the opening diameter, wherein the filter medium is bound by 0.1 to 0.2% by weight based on the weight of the filter medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06659994A JP3229115B2 (en) | 1994-03-09 | 1994-03-09 | Filter media for liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06659994A JP3229115B2 (en) | 1994-03-09 | 1994-03-09 | Filter media for liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07246305A JPH07246305A (en) | 1995-09-26 |
| JP3229115B2 true JP3229115B2 (en) | 2001-11-12 |
Family
ID=13320557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06659994A Expired - Fee Related JP3229115B2 (en) | 1994-03-09 | 1994-03-09 | Filter media for liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3229115B2 (en) |
-
1994
- 1994-03-09 JP JP06659994A patent/JP3229115B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07246305A (en) | 1995-09-26 |
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