JPS6362243B2 - - Google Patents
Info
- Publication number
- JPS6362243B2 JPS6362243B2 JP55024779A JP2477980A JPS6362243B2 JP S6362243 B2 JPS6362243 B2 JP S6362243B2 JP 55024779 A JP55024779 A JP 55024779A JP 2477980 A JP2477980 A JP 2477980A JP S6362243 B2 JPS6362243 B2 JP S6362243B2
- Authority
- JP
- Japan
- Prior art keywords
- separation membrane
- main body
- adhesive
- tubes
- hollow
- 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
Links
- 239000012528 membrane Substances 0.000 claims description 81
- 238000000926 separation method Methods 0.000 claims description 78
- 239000000853 adhesive Substances 0.000 claims description 29
- 230000001070 adhesive effect Effects 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
Description
【発明の詳細な説明】
本発明は、原子炉等から発生する放射性希ガス
の分離濃縮などに使用される中空分離膜モジユー
ルの流体透過量調整方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for adjusting the amount of fluid permeation through a hollow separation membrane module used for separating and concentrating radioactive rare gases generated from nuclear reactors and the like.
一般にこの種の中空分離膜モジユールは、第１
図の如く構成されている。図中Ａは本体であつて
円筒状をなし、この本体Ａ内には複数の分離膜管
Ｂ…が挿通されている。これらの分離膜管Ｂ…は
シリコンゴム等のガス透過性材料で形成され、中
空筒状をなしている。そして、これらの分離膜管
Ｂ−の端部外周面と本体Ａの端部内面との間は樹
脂等で固着密封して端末密封部Ｃ，Ｃが構成さ
れ、分離膜管Ｂ…の両端はこの本体Ａの端面に開
口している。そして、これらの分離膜管Ｂ…の外
周面と本体Ａの内面との間は空間部Ｄに形成さ
れ、また本体Ａの周壁部には透過ノズルＥが形成
され、この透過ノズルＥは空間部Ｄ内に連通して
いる。そして、分離すべきガスは分離膜管Ｂ…内
にその一端から所定圧力で供給され、これらの分
離膜管Ｂ…を透過して分離され、分離されたガス
は空間部Ｄを介して透過ノズルＥより流出し、ま
た残りのガスは分離膜管Ｂ…の他端から流出する
ように構成されている。ところで、このような中
空分離膜モジユールは、分離膜管の内径や長さに
よつて流体の透過率がばらつき、設計値に対して
誤差が生じる。このため、従来では許容誤差以上
のものは新しく作り直していたが、材料の無駄が
多く、製造コストが高くなるという不具合があつ
た。そこで、このような不具合を解消するために
中空分離膜モジユールを設計本数より多い分離膜
管で製作し、不要な分離膜管の両端を閉塞して流
体の透過量を調整する方法が考えられる。しかし
ながら、中空分離膜モジユールは通常数千から数
万本の分離膜管で構成されるため、これら多数分
離膜管の中から不要な分離膜管の両端のみを閉塞
することは極めて困難であつた。 Generally, this type of hollow separation membrane module has a first
It is configured as shown in the figure. In the figure, A is the main body, which has a cylindrical shape, and a plurality of separation membrane tubes B are inserted into the main body A. These separation membrane tubes B are made of a gas-permeable material such as silicone rubber and have a hollow cylindrical shape. The outer circumferential surface of the end of these separation membrane tubes B- and the inner surface of the end of the main body A are firmly sealed with resin or the like to form terminal sealed portions C, C, and both ends of the separation membrane tube B... The end face of this main body A is opened. A space D is formed between the outer peripheral surface of these separation membrane tubes B and the inner surface of the main body A, and a permeation nozzle E is formed in the peripheral wall of the main body A. It communicates with D. Then, the gas to be separated is supplied into the separation membrane tubes B from one end at a predetermined pressure, passes through these separation membrane tubes B, and is separated, and the separated gas passes through the space D to the permeation nozzle. The remaining gas flows out from the other end of the separation membrane tube B. Incidentally, in such a hollow separation membrane module, the fluid permeability varies depending on the inner diameter and length of the separation membrane tube, and an error occurs with respect to the designed value. For this reason, in the past, parts that exceeded tolerances were remade, but this resulted in problems such as a lot of wasted material and increased manufacturing costs. Therefore, in order to solve this problem, a method can be considered in which the hollow separation membrane module is manufactured with more separation membrane tubes than the designed number, and both ends of the unnecessary separation membrane tubes are closed to adjust the amount of fluid permeation. However, since a hollow separation membrane module is usually composed of several thousand to tens of thousands of separation membrane tubes, it is extremely difficult to block only both ends of unnecessary separation membrane tubes from among these many separation membrane tubes. .
本発明は以上のような事情にもとづいてなされ
たもので、その目的とするところは中空分離膜モ
ジユールの流体透過量を分離膜管の両端を閉塞し
て調整する際に多数本の分離膜管の中から閉塞す
べき分離膜管のみを確実に閉塞できる中空分離膜
モジユールの流体透過量調整方法を得ることにあ
る。 The present invention has been made based on the above circumstances, and its purpose is to control the amount of fluid permeated through a hollow separation membrane module by closing both ends of the separation membrane tubes. It is an object of the present invention to provide a method for adjusting the amount of fluid permeation through a hollow separation membrane module that can reliably close only the separation membrane tube to be blocked from inside.
以下本発明を第２図ないし第６図に示す一実施
例にしたがつて説明する。第２図において符号１
は中空分離膜モジユールの本体であつて、この本
体１は両端が開口した円筒状をなし、両端部は拡
径されている。また、この本体１の両端縁には接
続用のフランジ部２，２がそれぞれ形成されてい
る。そして、この本体１内には複数本の分離膜管
３…が挿通されている。これら分離膜管３…はシ
リコンゴム、ポリエチレン、多孔質酢酸セルロー
ス、多孔質エチルセルロース、４メチルペンタ
ン、ポリブタジエン、アクロン、ポリエステル等
ガス透過性の材料で形成され、細径の中空管状を
なしている。そして上記本体１の両端部内面と分
離膜管３…の両端部外周面との間にはそれぞれ樹
脂が充填されてこの本体１の両端部を閉塞すると
ともに分離膜管３…の端部を埋設密封し、端末密
封部４，４を形成している。そして、上記の分離
膜管３…の両端はこれらの端末密封部４，４の端
面にそれぞれ開口している。また、これら分離膜
管３…の外周面と本体１内面との間は空間部５に
形成され、また本体１の周壁部には透過ノズル６
が形成され、この透過ノズル６は空間部５に連通
している。次に、このような中空分離膜モジユー
ルの流体透過量を調整する方法について説明す
る。なお、この場合の中空分離膜モジユールは流
体透過量があらかじめ設計値より大きくなるよう
に設計本数より多い多数本（数千〜数万）の分離
膜管で構成されている。従つて、このような中空
分離膜モジユールの流体透過量を調整する場合に
は、まず第２図に示す如く本体１の一端に供給ノ
ズル７を有するフランジ部材８を取付けるととも
に、本体１の他端に排出ノズル９を有するフラン
ジ部材１０を取付ける。また、透過ノズル６には
流量計１１を接続し、また排出ノズル９には止め
弁１２を接続する。そして、この止め弁１２を閉
弁し、供給ノズル７より分離膜管３…内に所定の
圧力でガスを供給する。そして、これら分離膜管
３…を透過して透過ノズル６より流出するガスの
流量を流量計１１によつて測定し、この中空膜分
離モジユールの透過量を求める。そして、この透
過量と設計透過量との差を求め、この透過量の差
を分離膜管３…１本当りの透過量で除し、この差
に対応した分離膜管３…の本数を求める。次に第
３図に示す如く供給側のフランジ部材８を取外す
とともに透過ノズル６に真空ポンプ１３を接続
し、空間部５内を負圧にする。そして、上記で求
めた本数の分離膜管３…の開口に未硬化の接着剤
１４を塗布する。そして、これら分離膜管３…内
のガスは透過して空間部５内に吸引されるので、
この負圧によつて上記接着剤１４は分離膜管３…
の端部内に吸引充填される。そして、この状態で
一定時間放置し、この接着剤１４を硬化させ分離
膜管３…の一端部を閉塞する。次に第４図に示す
如く排出側のフランジ部材１０および真空ポンプ
１３を取外し、排出側の端末密封部４の端面全面
に未硬化の接着剤１５を押圧しながら塗布し、す
べての分離膜管３…の排出側端部内にこの接着剤
を充填する。次に第５図に示す如く本体１の供給
側端面フランジ部材８を取付け、その供給ノズル
７より所定圧力で流体を供給する。したがつてこ
の供給側端部内がすでに接着剤１４によつて閉塞
されている所定本数の分離膜管３…以外の分離膜
管３…内にはこの流体圧が供給され、この流体圧
によつて排出側端部内の未硬化の接着剤１５は押
し出され除去される。そして、この状態で一定時
間放置し、分離膜管３…の排出側端部内に残つた
接着剤１５ａを硬化させる。したがつて最初に求
めた透過量と設計透過量との差に対応した本数の
分離膜管３…の両端部は接着剤１４，１５ａによ
つて閉塞され、これらの分離膜管３…は透過に寄
与しなくなるので、設計透過量に対応した透過量
が得られる。次に本体１の両端部にフランジ部材
８，１０を取付け、前述と同様にして透過量を測
定し、これが設計透過量の許容誤差内であること
を確認して工程を終了する。 The present invention will be explained below with reference to an embodiment shown in FIGS. 2 to 6. In Figure 2, number 1
1 is a main body of a hollow separation membrane module, and this main body 1 has a cylindrical shape with both ends open, and both ends are enlarged in diameter. Furthermore, connection flanges 2, 2 are formed at both end edges of the main body 1, respectively. A plurality of separation membrane tubes 3 are inserted into the main body 1. These separation membrane tubes 3 are made of a gas permeable material such as silicone rubber, polyethylene, porous cellulose acetate, porous ethyl cellulose, 4-methylpentane, polybutadiene, acron, polyester, etc., and have a hollow tube shape with a small diameter. Resin is filled between the inner surfaces of both ends of the main body 1 and the outer peripheral surfaces of both ends of the separation membrane tubes 3 to close both ends of the main body 1 and bury the ends of the separation membrane tubes 3. The terminals are sealed to form terminal sealed portions 4, 4. Both ends of the separation membrane tubes 3 are opened at the end faces of these terminal sealing parts 4, 4, respectively. A space 5 is formed between the outer peripheral surface of these separation membrane tubes 3 and the inner surface of the main body 1, and a permeation nozzle 6 is formed on the peripheral wall of the main body 1.
is formed, and this transmission nozzle 6 communicates with the space 5. Next, a method for adjusting the amount of fluid permeation through such a hollow separation membrane module will be described. Note that the hollow separation membrane module in this case is composed of a large number of separation membrane tubes (several thousand to tens of thousands) larger than the designed number so that the amount of fluid permeation is greater than the designed value. Therefore, when adjusting the fluid permeation rate of such a hollow separation membrane module, first attach the flange member 8 having the supply nozzle 7 to one end of the main body 1 as shown in FIG. A flange member 10 having a discharge nozzle 9 is attached to. Further, a flow meter 11 is connected to the permeation nozzle 6, and a stop valve 12 is connected to the discharge nozzle 9. Then, the stop valve 12 is closed, and gas is supplied from the supply nozzle 7 into the separation membrane tubes 3 at a predetermined pressure. Then, the flow rate of the gas passing through these separation membrane tubes 3 and flowing out from the permeation nozzle 6 is measured by the flow meter 11, and the amount of permeation through the hollow membrane separation module is determined. Then, find the difference between this permeation amount and the design permeation amount, divide this difference in permeation amount by the permeation amount per separation membrane tube 3, and find the number of separation membrane tubes 3 corresponding to this difference. . Next, as shown in FIG. 3, the flange member 8 on the supply side is removed, and a vacuum pump 13 is connected to the permeation nozzle 6 to create a negative pressure in the space 5. Then, uncured adhesive 14 is applied to the openings of the number of separation membrane tubes 3 determined above. Then, the gas inside these separation membrane tubes 3 is permeated and sucked into the space 5, so that
Due to this negative pressure, the adhesive 14 is applied to the separation membrane tube 3...
is suction filled into the end of the Then, the adhesive 14 is left in this state for a certain period of time to harden and one end of the separation membrane tube 3 is closed. Next, as shown in FIG. 4, the flange member 10 and vacuum pump 13 on the discharge side are removed, and uncured adhesive 15 is applied to the entire end surface of the terminal sealing part 4 on the discharge side while being pressed. Fill the discharge side end of 3 with this adhesive. Next, as shown in FIG. 5, the supply end flange member 8 of the main body 1 is attached, and fluid is supplied from the supply nozzle 7 at a predetermined pressure. Therefore, this fluid pressure is supplied to the inside of the separation membrane tubes 3 other than the predetermined number of separation membrane tubes 3 whose supply side ends have already been closed with the adhesive 14, and this fluid pressure The uncured adhesive 15 in the discharge end is then pushed out and removed. Then, the adhesive 15a remaining in the discharge side end of the separation membrane tube 3 is cured by leaving it in this state for a certain period of time. Therefore, both ends of the separation membrane tubes 3, the number of which corresponds to the difference between the initially determined permeation amount and the designed permeation amount, are closed with adhesives 14 and 15a, and these separation membrane tubes 3... Therefore, the amount of transmission corresponding to the designed amount of transmission can be obtained. Next, the flange members 8 and 10 are attached to both ends of the main body 1, and the amount of permeation is measured in the same manner as described above. After confirming that this is within the tolerance of the designed amount of permeation, the process is completed.
このように、本体１内の空間部５を負圧にした
状態で閉塞すべき分離膜管３の一端に未硬化の接
着剤１４を充填し、充填された接着剤１４を硬化
させる。その後、本体１内に収容された全ての分
離膜管３…の他端に未硬化の接着剤１４を充填
し、全ての分離膜管３…の他端に充填された接着
剤１４が未硬化のうちに前記接着剤１４を硬化さ
せた本体１の一端側に流体を加圧供給することに
より、分離膜管３の他端に充填された未硬化の接
着剤１４が閉塞すべき分離膜管を除いて加圧流体
によつて押し出されるため、閉塞すべき分離膜管
の両端のみを接着剤によつて閉塞することができ
る。従つて、中空分離膜モジユールの流体透過量
を設計値通りに正確に調整することができる。 In this manner, one end of the separation membrane tube 3 to be closed is filled with the uncured adhesive 14 while the space 5 in the main body 1 is under negative pressure, and the filled adhesive 14 is cured. After that, the other ends of all the separation membrane tubes 3 housed in the main body 1 are filled with uncured adhesive 14, and the adhesive 14 filled in the other ends of all the separation membrane tubes 3 is uncured. By supplying fluid under pressure to one end of the main body 1 where the adhesive 14 has been cured, the uncured adhesive 14 filled in the other end of the separation membrane tube 3 closes the separation membrane tube to be closed. Since all parts except the membrane are pushed out by the pressurized fluid, only both ends of the separation membrane tube to be closed can be closed with the adhesive. Therefore, the fluid permeation amount of the hollow separation membrane module can be accurately adjusted to the designed value.
上述の如く本発明は、筒状の本体内に多数本の
中空管状をなす分離膜管を収容し、これら分離膜
管の両端開口を除く本体内の両端部を樹脂等にて
密封し、かつ上記本体の中間部に透過ノズルを設
けてなる中空分離膜モジユールにおいて、前記本
体内の空間部を負圧にした状態で閉塞すべき分離
膜管の一端に未硬化の接着剤を充填する工程と、
前記閉塞すべき分離膜管の一端に充填された接着
剤を硬化させる工程と、前記閉塞すべき分離膜管
の一端に充填された接着剤が硬化した後に前記本
体内に収容された全ての分離膜管の他端に未硬化
の接着剤を充填する工程と、前記全ての分離膜管
の他端に充填された接着剤が未硬化のうちに前記
接着剤を硬化させた本体の一端側に流体を加圧供
給する工程を具備したことを特徴とするものであ
る。従つて、本発明によれば多数の分離膜管の中
から閉塞すべき分離膜管のみを確実に閉塞でき、
中空分離膜モジユールの流体透過量を設計値通り
に正確に調整することができる。 As described above, the present invention accommodates a large number of hollow separation membrane tubes in a cylindrical main body, and seals both ends of the separation membrane tubes in the main body except for openings at both ends with resin or the like. In the hollow separation membrane module having a permeation nozzle in the middle part of the main body, filling one end of the separation membrane tube to be closed with an uncured adhesive while the space inside the main body is under negative pressure. ,
curing the adhesive filled in one end of the separation membrane tube to be closed; and curing all the separation membranes housed in the main body after the adhesive filled in the one end of the separation membrane tube to be closed is cured. Filling the other ends of the membrane tubes with an uncured adhesive, and while the adhesives filled at the other ends of all the separation membrane tubes are uncured, filling one end of the main body with the adhesive cured. This method is characterized by comprising a step of supplying fluid under pressure. Therefore, according to the present invention, it is possible to reliably close only the separation membrane tube to be blocked from among a large number of separation membrane tubes.
The amount of fluid permeable through the hollow separation membrane module can be adjusted accurately to the designed value.
第１図は中空分離膜モジユールの構造を示す縦
断面図、第２図ないし第６図は本発明による中空
分離膜モジユールの流体透過量調整方法の一実施
例を示す工程図である。
１……本体、３……分離膜管、４……端末密封
部、５……空間部、１１……流量計、１３……真
空ポンプ、１４，１５，１５ａ……接着剤。
FIG. 1 is a longitudinal sectional view showing the structure of a hollow separation membrane module, and FIGS. 2 to 6 are process diagrams showing an embodiment of a method for adjusting the fluid permeation amount of a hollow separation membrane module according to the present invention. DESCRIPTION OF SYMBOLS 1... Main body, 3... Separation membrane tube, 4... Terminal sealing part, 5... Space part, 11... Flow meter, 13... Vacuum pump, 14, 15, 15a... Adhesive.
Claims (1)
膜管を収容し、これら分離膜管の両端開口を除く
本体内の両端部を樹脂等にて密封し、かつ上記本
体の中間部に透過ノズルを設けてなる中空分離膜
モジユールにおいて、前記本体内の空間部を負圧
にした状態で閉塞すべき分離膜管の一端に未硬化
の接着剤を充填する工程と、前記閉塞すべき分離
膜管の一端に充填された接着剤を硬化させる工程
と、前記閉塞すべき分離膜管の一端に充填された
接着剤が硬化した後に前記本体内に収容された全
ての分離膜管の他端に未硬化の接着剤を充填する
工程と、前記全ての分離膜管の他端に充填された
接着剤が未硬化のうちに前記接着剤を硬化させた
本体の一端側に流体を加圧供給する工程を具備し
たことを特徴とする中空分離膜モジユールの流体
透過量調整方法。1. A large number of hollow separation membrane tubes are housed in a cylindrical body, and both ends of the separation membrane tubes, excluding openings at both ends, are sealed with resin, etc., and a middle part of the body is sealed. In a hollow separation membrane module provided with a permeation nozzle, a step of filling an uncured adhesive into one end of the separation membrane tube to be closed while the space inside the main body is under negative pressure, and a step of filling the separation membrane module to be closed with an uncured adhesive. curing the adhesive filled in one end of the membrane tube, and curing the other end of all the separation membrane tubes housed in the main body after the adhesive filled in the one end of the separation membrane tube to be closed is cured. and supplying fluid under pressure to one end of the main body where the adhesive is cured while the adhesive filled at the other end of all the separation membrane tubes is not yet cured. 1. A method for adjusting fluid permeation amount of a hollow separation membrane module, comprising the step of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2477980A JPS56120994A (en) | 1980-02-29 | 1980-02-29 | Method of making hollow film separation module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2477980A JPS56120994A (en) | 1980-02-29 | 1980-02-29 | Method of making hollow film separation module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56120994A JPS56120994A (en) | 1981-09-22 |
| JPS6362243B2 true JPS6362243B2 (en) | 1988-12-01 |
Family
ID=12147659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2477980A Granted JPS56120994A (en) | 1980-02-29 | 1980-02-29 | Method of making hollow film separation module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56120994A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371122A (en) * | 2010-08-06 | 2012-03-14 | 旭化成医疗株式会社 | Hollow fiber assembly |
| US10959933B1 (en) | 2020-06-01 | 2021-03-30 | The Procter & Gamble Company | Low pH skin care composition and methods of using the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013091213A1 (en) * | 2011-12-22 | 2013-06-27 | Huang Hou-Chi | Dismountable reaction module and connecting devices therefor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5132487A (en) * | 1974-09-14 | 1976-03-19 | Asahi Chemical Ind | CHUKUSHIRYUTAI BUNRISOCHI NO HOSHUHOHO |
| JPS54135675A (en) * | 1978-04-12 | 1979-10-22 | Kuraray Co Ltd | Repairing method for leakage of hollow yarn membrane module |
| JPS54138874A (en) * | 1978-04-20 | 1979-10-27 | Kuraray Co Ltd | Repairing method for leakage of hollow yarn membrane module |
-
1980
- 1980-02-29 JP JP2477980A patent/JPS56120994A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5132487A (en) * | 1974-09-14 | 1976-03-19 | Asahi Chemical Ind | CHUKUSHIRYUTAI BUNRISOCHI NO HOSHUHOHO |
| JPS54135675A (en) * | 1978-04-12 | 1979-10-22 | Kuraray Co Ltd | Repairing method for leakage of hollow yarn membrane module |
| JPS54138874A (en) * | 1978-04-20 | 1979-10-27 | Kuraray Co Ltd | Repairing method for leakage of hollow yarn membrane module |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371122A (en) * | 2010-08-06 | 2012-03-14 | 旭化成医疗株式会社 | Hollow fiber assembly |
| US10959933B1 (en) | 2020-06-01 | 2021-03-30 | The Procter & Gamble Company | Low pH skin care composition and methods of using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56120994A (en) | 1981-09-22 |
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