JPS63205108A - Coating of hollow filament - Google Patents
Coating of hollow filamentInfo
- Publication number
- JPS63205108A JPS63205108A JP62036662A JP3666287A JPS63205108A JP S63205108 A JPS63205108 A JP S63205108A JP 62036662 A JP62036662 A JP 62036662A JP 3666287 A JP3666287 A JP 3666287A JP S63205108 A JPS63205108 A JP S63205108A
- Authority
- JP
- Japan
- Prior art keywords
- support
- coating
- hollow fiber
- coating solution
- hollow filament
- 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.)
- Granted
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 52
- 239000011248 coating agent Substances 0.000 title claims abstract description 44
- 239000012510 hollow fiber Substances 0.000 claims description 53
- 239000000126 substance Substances 0.000 claims description 5
- 239000011247 coating layer Substances 0.000 abstract description 12
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 229920001747 Cellulose diacetate Polymers 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 4
- 239000004695 Polyether sulfone Substances 0.000 abstract description 3
- 229920006393 polyether sulfone Polymers 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 abstract 6
- 238000007654 immersion Methods 0.000 abstract 3
- 229920001971 elastomer Polymers 0.000 abstract 1
- 239000000806 elastomer Substances 0.000 abstract 1
- 239000011259 mixed solution Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 16
- 239000012528 membrane Substances 0.000 description 15
- 239000002131 composite material Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000635 electron micrograph Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000002166 wet spinning Methods 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000000578 dry spinning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001891 gel spinning Methods 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
ガス分離、海水淡水化等のように、特定の成分を有効に
分離、濃縮を行う際に選択透過性をもつ中空糸複合膜を
用いる方法は対象とする物質の相変化を伴なわず効率よ
く行われるためエネルギー的に有利な方法であり、近年
盛んに実施されつつある０本発明は、中空糸支持体の表
面上に、コーティング手法により分離活性層を形成させ
て、中空糸複合膜を製造する方法に関するものである。[Detailed Description of the Invention] [Technical Field] This invention does not apply to methods that use hollow fiber composite membranes with selective permselectivity when effectively separating and concentrating specific components, such as in gas separation and seawater desalination. This method is energetically advantageous because it is carried out efficiently without any phase change of the substance, and has been widely practiced in recent years. The present invention relates to a method for manufacturing a hollow fiber composite membrane by forming a hollow fiber composite membrane.
従来、中空糸複合膜の製造方法には、（ａ）中空糸の表
面上にポリマー溶液を塗布する方法、（ｂ）中空糸表面
上でモノマーを重合させる方法、（Ｃ）多重管ノズルを
用いて、紡糸時に複合膜とする方法があるが、（ａ）法
の場合ではｒ４膜化が困難であり、（ｂ）法の場合では
、極薄かつ均質のピンホールフリーの薄膜を形成するこ
とは困難であった。Conventionally, methods for manufacturing hollow fiber composite membranes include (a) a method of applying a polymer solution onto the surface of the hollow fibers, (b) a method of polymerizing monomers on the surface of the hollow fibers, and (C) a method using a multi-tube nozzle. Therefore, there is a method of forming a composite film during spinning, but in the case of method (a) it is difficult to form an R4 film, and in the case of method (b) it is difficult to form an extremely thin and homogeneous pinhole-free film. was difficult.
また、（Ｃ）法では、製造法が非常に複雑で実際上実施
が困難であった。Furthermore, in method (C), the manufacturing method is extremely complicated and is difficult to implement in practice.
本発明は上記欠点をかんがみて、特に中空糸複合膜をコ
ーティング溶液塗布法によって製造する場合に、分離能
を有する薄膜を中空糸表面上に生産高率よく均一に形成
させようとするものである。In view of the above-mentioned drawbacks, the present invention aims to uniformly form a thin film having separation ability on the surface of hollow fibers with high production efficiency, especially when hollow fiber composite membranes are manufactured by a coating solution application method. .
中空糸外表面上にコーティングする最も簡単な方法とし
ては、中空糸支持体を薄膜の素材である高分子物質を溶
解したコーテイング液に浸漬した後、引き上げて乾燥す
ることである。この場合、薄膜を形成させるためには、
コーティング速度や、溶液濃度および粘度等の制御が必
要である。濃度をあまり低くすると粘度が低くなりコー
ティング溶液が中空糸支持体内に必要以上に入りこみ、
また逆に濃度が高いと過剰のコーティング溶液が中空糸
表面に付着するといった１問題がある。また、特願昭６
１−４３５６に記載しであるコーティング方法は、中空
糸をコーティング溶液内に浸漬する前に、弾性体を通過
させるために、中空糸支持膜に付着した過剰のコーティ
ング溶液を拭うことができないという欠点を有している
。The simplest method for coating the outer surface of the hollow fibers is to immerse the hollow fiber support in a coating liquid in which a polymeric substance, which is the material of the thin film, is dissolved, and then pull it out and dry it. In this case, in order to form a thin film,
Control of coating speed, solution concentration, viscosity, etc. is required. If the concentration is too low, the viscosity will be low and the coating solution will enter the hollow fiber support more than necessary.
On the other hand, if the concentration is high, there is a problem in that excessive coating solution adheres to the surface of the hollow fiber. Also, the special request
The coating method described in No. 1-4356 has the disadvantage that excess coating solution adhering to the hollow fiber support membrane cannot be wiped off because the hollow fibers are passed through the elastic body before being immersed in the coating solution. have.
本発明者等は、上述の問題点を解決すべく鋭意研究を重
ねた結果、中空糸外表面上に均一に薄膜を形成させる本
発明を見出した。即ち、中空糸外表面に、コーティング
溶液を塗布するに際し、中空糸をコーティング溶液内に
浸漬する前後または後に、弾性体のピンホールを通過さ
せることにより、中空糸外表面上にコーティング溶液を
均一に塗布することを特徴とする中空糸のコーティング
方法に関するものである。The inventors of the present invention have conducted extensive research to solve the above-mentioned problems, and as a result, they have discovered the present invention, which allows a thin film to be uniformly formed on the outer surface of the hollow fiber. That is, when applying a coating solution to the outer surface of the hollow fiber, the coating solution is uniformly applied to the outer surface of the hollow fiber by passing it through a pinhole in the elastic body before or after immersing the hollow fiber in the coating solution. The present invention relates to a hollow fiber coating method characterized by coating.
本発明において使用する中空糸支持体は、ポリエチレン
、ポリエステル、ポリアミド、ポリイミド、ポリプロピ
レン、ポリ塩化ビニル、ポリアクリレートエステル、ポ
リメタクリレートエステル、ポリアクリロニトリル、ポ
リ塩化ビニリデン、ポリ弗化ビニリデン、セルロース、
ポリエーテルスルホン、ポリスルホン等及びこれらの誘
導体やブレンド物を用いて製造される。中空糸支持体の
製造方法には溶融紡糸、湿式紡糸、乾式紡糸、乾湿式紡
糸等があり、中空糸の材質及び、目的とする特性に応じ
て適用する。また、本発明に用いる中空糸支持体として
は、その外表面上の微孔の平均径が、０．５μｍ以下が
よく、望ましくは０．１μｍ以下がよい、平均孔径が１
μｍより大きい場合、中空糸表面上に塗布したコーティ
ング溶液が中空糸支持体内に浸入することが多くなり、
均一かつ極薄のコーティング層を形成させることが難し
くなる。また、コーティングに用いる高分子重合体も前
記の物質を、溶剤に溶かして使用することができる。コ
ーティング溶液の濃度は、その粘度、コーティング層厚
み等によって任意に選ぶことができるが、通常は２０重
量％以下がよく、好ましくは１０重量％以下である。ま
た、本発明に用いる弾性体は中空糸支持体の表面を傷つ
けないものであればなんでもよいが、弾性に富むスポン
ジ状の物質が特に好ましい０弾性体のピンホール径は、
均一に塗布するためには中空糸支持体の外径の１．５倍
以下がよく、好ましくは中空糸支持体の外径以下である
。また、弾性体の厚みは、必要とするコーティング層の
厚さに応じて任意に選ぶことができ、必要数だけ重ねる
こともできる。The hollow fiber supports used in the present invention include polyethylene, polyester, polyamide, polyimide, polypropylene, polyvinyl chloride, polyacrylate ester, polymethacrylate ester, polyacrylonitrile, polyvinylidene chloride, polyvinylidene fluoride, cellulose,
Manufactured using polyether sulfone, polysulfone, etc., and their derivatives and blends. Methods for producing the hollow fiber support include melt spinning, wet spinning, dry spinning, dry-wet spinning, etc., which are applied depending on the material of the hollow fiber and the desired characteristics. In addition, the hollow fiber support used in the present invention preferably has an average diameter of micropores on its outer surface of 0.5 μm or less, preferably 0.1 μm or less, and an average pore diameter of 1 μm or less.
If it is larger than μm, the coating solution applied on the hollow fiber surface will often penetrate into the hollow fiber support.
It becomes difficult to form a uniform and extremely thin coating layer. Moreover, the high molecular weight polymer used for coating can be used by dissolving the above-mentioned substances in a solvent. The concentration of the coating solution can be arbitrarily selected depending on its viscosity, coating layer thickness, etc., but is usually 20% by weight or less, preferably 10% by weight or less. Further, the elastic body used in the present invention may be any material as long as it does not damage the surface of the hollow fiber support, but the pinhole diameter of the elastic body is particularly preferably a spongy material with high elasticity.
In order to apply it uniformly, it is preferably at most 1.5 times the outer diameter of the hollow fiber support, preferably at most 1.5 times the outer diameter of the hollow fiber support. Further, the thickness of the elastic body can be arbitrarily selected depending on the required thickness of the coating layer, and the required number of elastic bodies can be stacked.
本発明によるコーティング方法によれば、中空糸支持体
がコーティング溶液内を通過した直後にスポンジ等の弾
性体のピンホールによって過剰のコーティング溶液を拭
い取ることができるので、粘度の高い濃い溶液でも薄く
塗ることができる。According to the coating method of the present invention, excess coating solution can be wiped off with the pinhole of an elastic body such as a sponge immediately after the hollow fiber support passes through the coating solution, so even a thick solution with high viscosity can be thinned. Can be painted.
この場合コーティング層の厚さは、主に溶液濃度と弾性
体の厚み及びピンホール径で規制することができる。ま
た製造上、中空糸支持体表面に水滴その他の液が付着し
ていて、後のコーティング工程に悪影響を与える場合で
も、コーティング溶液に浸漬する前に、必要とする回数
もしくは距離に渡って別の弾性体の穴を通過させること
によって表面上の液滴を除去することができる。また、
紡糸工程の一部として、本発明のコーティング装置を設
置すれば、紡糸〜コーティングの連続化も容易に達成で
きる。さらに、このコーティング装置を中空糸の長さ方
向に多段に配置することによってコーティング層を多層
にすることも可能である。In this case, the thickness of the coating layer can be controlled mainly by the solution concentration, the thickness of the elastic body, and the pinhole diameter. In addition, even if water droplets or other liquids adhere to the surface of the hollow fiber support during manufacturing and may adversely affect the subsequent coating process, it is necessary to immerse it in the coating solution for the required number of times or distance. Droplets on the surface can be removed by passing through holes in the elastic body. Also,
If the coating device of the present invention is installed as part of the spinning process, continuous spinning to coating can be easily achieved. Furthermore, by arranging this coating device in multiple stages in the length direction of the hollow fiber, it is also possible to form a multilayer coating layer.
以下に、実施例により本発明をさらに詳しく説明する。 The present invention will be explained in more detail below with reference to Examples.
実施例１
材質にポリエーテルスルホンを選定し、湿式紡糸法によ
り内径４４０μｍ、外径８１０μｌの中空糸支持体を得
た。この支持体を用いて、第１図に示す装置にて、コー
ティングを行った。使用した弾性体は、ピンホール径が
８００μｌ、厚みが約３ｆｆｉＩ１１であった。コーテ
ィング溶液中の溶質としては、セルロースジアセテート
を６．５ｗｔ％とじ、また溶剤としては、酢酸エチル／
エタノール＝９５／ ５ （ｂｙ ｗｅｉｇｈｔ ）
ノ混合溶剤を使用Ｌ７’：、ＷＷ温度は２５℃、粘度は
ｔｓｃｐであ−）な、またコーティング溶液の凝固液と
しては水を用いた。この、中空糸複合膜のコーティング
Ｍ表面は、第５図に示す電子顕微鏡写真より、径０．１
μｍ以下の孔が均一に分布している緻密層であることが
わかった。Example 1 Polyether sulfone was selected as the material, and a hollow fiber support having an inner diameter of 440 μm and an outer diameter of 810 μl was obtained by a wet spinning method. Using this support, coating was performed using the apparatus shown in FIG. The elastic body used had a pinhole diameter of 800 μl and a thickness of about 3ffiI11. The solute in the coating solution was 6.5 wt% cellulose diacetate, and the solvent was ethyl acetate/
Ethanol = 95/5 (by weight)
A mixed solvent was used (L7': WW temperature was 25 DEG C., viscosity was tscp), and water was used as the coagulating liquid of the coating solution. From the electron micrograph shown in Fig. 5, the diameter of the coating M surface of this hollow fiber composite membrane is 0.1
It was found to be a dense layer in which pores smaller than μm were uniformly distributed.
実施例２
前記実施例１に記載の中空糸支持体と第２図に示す装置
を用い赤外線ランプ（約４０℃）にて乾燥することによ
り、中空糸複合膜を製遺した。使用した弾性体のピンホ
ール径は８００μｍ、厚みは約３Ｂであった。コーティ
ング溶液中の溶質としてはセルロースジアセテート３ｗ
ｔ％、溶剤としてはアセトン９７ｗｔＸを使用した。第
６図に示す電子類Ｗ、鏡写真から、コーティング層表面
は径０゜１μｍ以下の孔が均一に分布している緻密層で
あることがわかった。Example 2 A hollow fiber composite membrane was prepared by drying with an infrared lamp (approximately 40° C.) using the hollow fiber support described in Example 1 and the apparatus shown in FIG. The pinhole diameter of the elastic body used was 800 μm, and the thickness was about 3B. Cellulose diacetate 3w is used as a solute in the coating solution.
t%, and acetone 97wtX was used as the solvent. From the mirror photograph of the electronics W shown in FIG. 6, it was found that the surface of the coating layer was a dense layer in which pores with diameters of 0° and 1 μm or less were uniformly distributed.
比較例１
前記実施例１に記載の中空糸支持体と第３図に示す装置
を用い熱風（６６℃、風速５〜６１／Ｉｎ１ｎ ）にて
乾燥することにより、中空糸複合膜を製遺しな、コーテ
ィング溶液中の溶質としてはセルロースジアセテート３
ｗｔ％、溶剤としては酢酸エチル／エタノール＝９５１
５ （ｂｙ ｗｅｉｃ＋ｈｔ ）の混合溶剤を使用した
。コーテイング後に膜のＮ２透過係数を測定したところ
０．２９１１１／ｃｄ −ｓｅｃ −ａｔｒａとなり、
未コーティングの状態での数値にほぼ等しくなった。こ
の中空糸複合膜は、コーティング層の大部分が欠落して
いるものと思われる。Comparative Example 1 A hollow fiber composite membrane was produced without leaving any residue by drying with hot air (66°C, wind speed 5 to 61/In1n) using the hollow fiber support described in Example 1 and the apparatus shown in FIG. , cellulose diacetate 3 as a solute in the coating solution.
wt%, solvent is ethyl acetate/ethanol = 951
A mixed solvent of 5 (by weight+ht) was used. When the N2 permeability coefficient of the membrane was measured after coating, it was 0.29111/cd -sec -atra,
The values were almost equal to those in the uncoated state. It seems that most of the coating layer is missing in this hollow fiber composite membrane.
比較例２
前記実施例１に記載の中空糸支持体と第４図に示す装置
を用い赤外線ランプ（約４０℃）にて乾燥することによ
り中空糸複合膜を製造した。コーティング溶液としては
セルロースジアセテート３ｗｔ％、アセトン９７ＶＩｔ
％を使用した。第７図に示した電子顕微鏡写真から、コ
ーティング層表面は、径０８１μを以下の孔が分布して
いる部分と径１μｍ前後の孔が分布している部分が共存
していることがわかった。Comparative Example 2 A hollow fiber composite membrane was produced by drying with an infrared lamp (approximately 40° C.) using the hollow fiber support described in Example 1 and the apparatus shown in FIG. Coating solution: cellulose diacetate 3wt%, acetone 97VIt
%It was used. From the electron micrograph shown in FIG. 7, it was found that on the surface of the coating layer, there were parts where pores with a diameter of 081 μm or less were distributed and parts where pores with a diameter of about 1 μm were distributed.
第１図は、本発明中、実施例１において使用したコーテ
ィング装置の概略図である。第２図は、本発明中、実施
例２において使用したコーティング装置の概略図である
。第３図は、本発明中、比較例１において使用したコー
ティング装置の概略図である。第４図は、本発明中、比
較例２において使用したコーティング装置の概略図であ
る。第５図は、本発明中、実施例１で製造した中空糸複
合膜のコーティング層表面の電子顕微鏡写真（倍率１万
倍）である。第６図は、本発明中、実施例２で製造した
中空糸複合膜のコーティング層表面の電子類ｇ＆鏡写真
（倍率１万倍）である、第７図は、本発明中、比較例２
で製造した中空糸複合膜のコーティング層表面の電子顕
微鏡写真（倍率１万倍）である。
１・・・中空糸送り出し用ボビン、２・・・水、３・・
・中空糸、４・・・コーティング溶液、５・・・スポン
ジ（ピンホール１箇所）、６・・・スポンジ（ピンホー
ル２箇所）、７・・・中空糸巻き取り用ボビン、８・・
・赤外線ランプ、９・・・撹はん子、１０・・・ドライ
ヤー、特許出願人 ダイセル化学工業株式会社代理人
弁理士 越 場 隆
第３図
第４図
区＝の汀乞
第５図
図面の浄書
第６図
図面の浄ゼ；
第７図
手続補正書（方式）
昭和β年ｊ月ユＬ日FIG. 1 is a schematic diagram of a coating apparatus used in Example 1 of the present invention. FIG. 2 is a schematic diagram of a coating apparatus used in Example 2 of the present invention. FIG. 3 is a schematic diagram of a coating apparatus used in Comparative Example 1 of the present invention. FIG. 4 is a schematic diagram of a coating apparatus used in Comparative Example 2 of the present invention. FIG. 5 is an electron micrograph (10,000 times magnification) of the surface of the coating layer of the hollow fiber composite membrane manufactured in Example 1 of the present invention. Figure 6 is an electronic and mirror photograph (10,000x magnification) of the surface of the coating layer of the hollow fiber composite membrane produced in Example 2 of the present invention. Figure 7 is a photograph of Comparative Example 2 of the present invention.
This is an electron micrograph (10,000x magnification) of the surface of the coating layer of the hollow fiber composite membrane manufactured in . 1...Bobbin for sending out hollow fibers, 2...Water, 3...
・Hollow fiber, 4... Coating solution, 5... Sponge (1 pinhole), 6... Sponge (2 pinholes), 7... Hollow fiber winding bobbin, 8...
・Infrared lamp, 9... stirrer, 10... hair dryer, patent applicant Daicel Chemical Industries, Ltd. agent
Patent attorney Takashi Koshiba; engraving of Figure 3, Figure 4 area; engraving of Figure 5; purification of Figure 6; procedural amendment to Figure 7 (method) July 1999
Claims (3)
際し、中空糸をコーティング溶液内に浸漬する前後又は
後に、弾性体のピンホールを通過させることにより、中
空糸表面上にコーティング溶液を均一に塗布することを
特徴する中空糸のコーティング方法。(1) When applying a coating solution to the outer surface of the hollow fiber, the coating solution is uniformly applied to the surface of the hollow fiber by passing it through a pinhole in the elastic body before or after immersing the hollow fiber in the coating solution. A hollow fiber coating method characterized by coating.
る特許請求の範囲第１項記載の中空糸のコーティング方
法。(2) The hollow fiber coating method according to claim 1, wherein the elastic body is a sponge-like substance.
す中空糸径の１．５倍以下であることを特徴とする特許
請求の範囲第１項又は第２項記載の中空糸のコーティン
グ方法。(3) The hollow fiber coating method according to claim 1 or 2, wherein the pinhole diameter of the elastic body is 1.5 times or less the diameter of the hollow fiber to be coated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62036662A JPH0712417B2 (en) | 1987-02-19 | 1987-02-19 | Hollow fiber coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62036662A JPH0712417B2 (en) | 1987-02-19 | 1987-02-19 | Hollow fiber coating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63205108A true JPS63205108A (en) | 1988-08-24 |
| JPH0712417B2 JPH0712417B2 (en) | 1995-02-15 |
Family
ID=12476068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62036662A Expired - Lifetime JPH0712417B2 (en) | 1987-02-19 | 1987-02-19 | Hollow fiber coating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0712417B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006150271A (en) * | 2004-11-30 | 2006-06-15 | Daicel Chem Ind Ltd | Production method of hollow fiber semipermeable membrane |
| EP3586947A1 (en) | 2014-08-21 | 2020-01-01 | Asahi Kasei Kabushiki Kaisha | Composite hollow fiber membrane module and manufacturing method therefor |
| JP2022525882A (en) * | 2019-03-15 | 2022-05-20 | インテグリス・インコーポレーテッド | Composite hollow fibers and related methods and products |
-
1987
- 1987-02-19 JP JP62036662A patent/JPH0712417B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006150271A (en) * | 2004-11-30 | 2006-06-15 | Daicel Chem Ind Ltd | Production method of hollow fiber semipermeable membrane |
| EP3586947A1 (en) | 2014-08-21 | 2020-01-01 | Asahi Kasei Kabushiki Kaisha | Composite hollow fiber membrane module and manufacturing method therefor |
| US10583404B2 (en) | 2014-08-21 | 2020-03-10 | Asahi Kasei Kabushiki Kaisha | Composite hollow fiber membrane module and manufacturing method therefor |
| JP2022525882A (en) * | 2019-03-15 | 2022-05-20 | インテグリス・インコーポレーテッド | Composite hollow fibers and related methods and products |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0712417B2 (en) | 1995-02-15 |
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