JPH0418923A - Production of corrugated membrane - Google Patents
Production of corrugated membraneInfo
- Publication number
- JPH0418923A JPH0418923A JP12166090A JP12166090A JPH0418923A JP H0418923 A JPH0418923 A JP H0418923A JP 12166090 A JP12166090 A JP 12166090A JP 12166090 A JP12166090 A JP 12166090A JP H0418923 A JPH0418923 A JP H0418923A
- Authority
- JP
- Japan
- Prior art keywords
- corrugated
- coating layer
- cloth
- dope
- membrane
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 239000012528 membrane Substances 0.000 title abstract description 66
- 239000011247 coating layer Substances 0.000 claims abstract description 62
- 239000004744 fabric Substances 0.000 claims abstract description 56
- 239000007788 liquid Substances 0.000 claims description 25
- 238000000576 coating method Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000005345 coagulation Methods 0.000 claims description 15
- 230000015271 coagulation Effects 0.000 claims description 15
- 230000001112 coagulating effect Effects 0.000 claims description 13
- 238000007711 solidification Methods 0.000 abstract description 8
- 230000008023 solidification Effects 0.000 abstract description 8
- 239000000701 coagulant Substances 0.000 abstract 3
- 239000010410 layer Substances 0.000 description 22
- 239000011550 stock solution Substances 0.000 description 16
- 239000000243 solution Substances 0.000 description 15
- 238000000926 separation method Methods 0.000 description 13
- 241001669573 Galeorhinus galeus Species 0.000 description 10
- 238000004049 embossing Methods 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- -1 polypropylene Polymers 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 229920002301 cellulose acetate Polymers 0.000 description 2
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 241000272814 Anser sp. Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 1
- MPCRDALPQLDDFX-UHFFFAOYSA-L Magnesium perchlorate Chemical compound [Mg+2].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O MPCRDALPQLDDFX-UHFFFAOYSA-L 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- YBCVMFKXIKNREZ-UHFFFAOYSA-N acoh acetic acid Chemical compound CC(O)=O.CC(O)=O YBCVMFKXIKNREZ-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229920003174 cellulose-based polymer Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229960001701 chloroform Drugs 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 229910001867 inorganic solvent Inorganic materials 0.000 description 1
- 239000003049 inorganic solvent Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- XIPFMBOWZXULIA-UHFFFAOYSA-N pivalamide Chemical compound CC(C)(C)C(N)=O XIPFMBOWZXULIA-UHFFFAOYSA-N 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
［産業上の利用分野］
本発明は膜分離装置に使用する上で有用な波形膜の製造
方法に関する。
［従来の技術と発明が解決しようとする課題］従来、平
膜を用いた膜分離装置には、スパイラルワラント型、積
層型、プリーツ型等の種々のモジュールか使用されてい
る。またこれらのモンユールでは、原液の流路を確保す
るため、通路、股間にスペーサを介在させている。しか
しながら、スペーサを介在させると、モジュール化つ・
煩雑であり、コスト高となる。そこで、２枚の波形膜、
または波形膜と平膜とを対にして用い、両膜間に形成さ
れる多数の並列流路を確保することにより、スペーサを
省略すると共に、膜面積を大きくし、原液の流れを均等
に配分する膜要素が提案されている。
一方、上記波形膜は、平坦な支持（Ｉｉに膜形成用ドー
プ液を塗布した後、凝固液に浸漬し、乾燥することによ
り、平膜を作製し、該平膜を波形ロル等で挾み、連続的
にエンホス加工することにより製造できる。しかしなが
ら、この方法では、エンボス加工に伴い、膜の水道過流
速か低下すると共に、均一な膜を形成するのが困難でも
ある。さらには、平膜製造工程とエンボス加工工程とを
必要とするので工程数か多くなり、生産性が低下する。
またこのようにして？！？られた波形膜と平膜とをｗ＋
ｇ Ｈると、波形膜の谷部と・［ろ膜の甲面部とて並
列流路か形成される。この並列流路は、隣り合う流路か
区画された状態で一方の方向に互いに独立に直線状に延
びている。このように並列流路では、原液は、区画され
た同一の流路を流れるので、原液の流れが並列流路の形
状やその精度により大きく左右される。また、−旦、流
路間に配分された流量は、各流路が独立であるため、流
路間で再分配の機会かなく、膜全体の全流路の分離性能
は、流量分配が均等に行なわれる場合よりも低下する。
」、記の点に鑑み、本発明者は、並列流路を横方向に連
通せしめる連通路を設けた成形膜要素について先に提案
した（特公昭６３−１１９２２号公報参照）。
この成形膜要素によると、連通路が形成されているため
、並列流路を流れる原液を連通路で横方向に案内しつつ
再分配でき、原液の流れを均等化できる。しかしながら
、上記成形膜要素は、波形膜を作製した後、ヒートブレ
スにより上記連通路を形成しているため、膜表面の緻密
なスキン層か損傷し晶いたけてなく、均一な分離膜をｆ
′Ｆ製するのが困難であり、膜の分離効率か低下する。
また並列流路を横方向に連通ずる連通路をヒートブレス
により形成しているため、上程の増加によりコストか増
加し、また連通路の大きさやその部荀を精度よく形成す
るのか困難である。
従って、本発明の目的は、膜のＪＭ ｍかなく、均で分
離能に優れた波形膜を連続的に製造できる波形膜の製造
方法を提供するこ占にある。
また本発明の他の目的は、平膜と組合せて、並列流路を
流れる原液を再分配して流れを均等化できると共に、均
一で分離能に優れた波形膜を、流延成膜の一工程て連続
的に製造できる波形膜のシ１造方法を提供することにあ
る。
［課題を解決するための手段および作用〕一般に、波形
支持布のように平坦でない表面に追随１７てトープを均
一な厚みに塗布しても、ドブ自身の表面張力によりドー
プ表面を平坦にしようとする力と、重力によって流下し
ようとする力とによって、塗布されたトープ層の厚みは
、時間の紅過とＪ（に、塗布時の厚みの均一性を失う。
そこで、支Ｆ１ｊ ４ｒの波形に追随して均一な厚みに
ドアｆを塗ｒ（ｒ Ｌ、、た後、この１・−膜表面に凝
固液を接触させ、１・−膜表面を固化させることにより
、ドブの流動を１ｕ口ｌし、波形支持布に略均−な厚み
の膜を連続的に製造できることを見いたし、本発明を完
成した。すなわち、本発明は、断面波形に成形した支持
布に膜形成用トープを塗布する塗布り程と、支持布の波
形に沿って塗布層の厚みを均一化する塗布層厚調整上程
と、凝固液で塗布層を凝固させる凝固上程とを含む波形
膜の製造方法により、」−記課題を解決するものである
。
また本発明は、塗布層厚調整工程で、支持布の波形に沿
って形成した塗布層のうち少なくとも頂部に、波形列を
横断する方向に凹部を形成する波形膜の製造方法により
、上記課題を解決するものである。
上記構成の波形膜の製造方法によれば、塗布工程で波形
に成形された支持布にドープを塗布した後、塗布層厚調
整工ｆＹで、ｊ、ｆｉ ｎｉ層の厚みを支１９１６の波
形に沿って均一に調整し、凝固１程で、凝固ｉ１Ｍによ
り塗４１層を凝固させるので、ｔｒｙ宋のよ−）；・１
′膜を製造した後、波形ロール等でエンポス力１するこ
となく、均一な股を連続的に製造できる。
また上記塗布層厚調整り程で、支持１１ｉの波形（沿っ
て形成した塗布層のうち：Ｊ＞ｆＡ（とも頂部に、波形
列を横断する方向に凹部を１１三成する方法は、波形膜
を作製した後、ヒートブレスにより連通部を形成する方
法と異なり、凹部を形成した後、−７布層を凝固させて
、波形膜を作製するので、膜の損傷かなく、均一な膜か
形成される。このようにして得られた波形膜と平膜とを
１１１合せて分離膜を構成すると、直線状に延びる並列
流路を流れるＩＩ：１、液は、波形頂部に形成された凹
部を通して、相隣り合う並列流路を流れる原液と合流し
、原液か山分間され、かつ原液の流れが均等化される。
［実施例コ
以下に、添付図面に基づいて本発明をより詳細に説明す
る。なお、理解を容易にするため、同一の要素には同一
のｎ号を付して説明する。
第１図は本発明の一実施例を示す概略縦断面図であり、
この例では、支持布の１桟給方向と直交する方向に波形
列か延びた状態で、支持布を供給している。
塗（１１Ｌ程ては、ｒ・め波形に成旧し、た支持布（１
）を、該支持ｎｉ （１１の波形列に適合した波形表面
をａするトラノ・（２）で搬送し２つつ、波形列と直交
する方向に供給すると共に、ドープ液（３）をドープ液
供給スリット（４）から供給し１、支持布（１）にドー
プ液（３）を流延塗布している。
−１−記支持布（１）としては、天然又は合成繊維製布
、例えば、ポリエチレン、ポリプロピレンなとのポリオ
レフィン繊維、ポリエチレンテレフタレート等のポリニ
スデル、ナイロン謀維等の織布や不織４１等が例示され
る。
上記ドープ液（３）は、分離膜をＩ［し成（、うる種々
のポリマーの溶液であり、通常、ポリマーを１０〜３０
重量％程度含有し２ている。ポリマーとしては、膜形成
材料であれば特に制限されず、例えば、ポリアクリル酸
エステル、ポＩｌメタクリル酸エステル等のアクリル系
ポリマー、ポリヒニルアル＝フル、ポリヒニルホルマー
ル、エチレン−ヒニルアルコール」（重合体な、とのビ
ニル系ポリマー スチレン−アクリロニトリル共重合体
、スチレ７−ブタシエン共重合体等のスチレン系ポリマ
ー ポリアクリロニトリル古その共重合体、ポリエーテ
ル、ポリエーテル−１−、ポリエステル、ボリアＥｌ・
、ポリイミド、ポリサルホン、ポリエーテルサルホンポ
リマー酢酸セルロース、酢酸醋酸セルロース等のセルロ
ース系高分子等が例示される。これちのポリマーは単独
で又は二種以上混合して使用できる。
溶媒としては、ポリマーの良溶媒か使用できるが、これ
に膨潤剤なとを添加してもよい。溶媒としては、例えば
、水、メタノール、エタノール、プロパツール、ブタノ
ール、シクロヘキサノール等のアルコール類、エチレン
クリコール、エチレングリコールモノアルキルエーテル
等のクリコル類とその誘導体、アセ）二、メチルエチル
）ｒ’ ｌ。
；、：タロヘキサノ：．．．Ｗのケトン類、酢酸メチル
、酢酸エチル、耐酸プロピル方のエステル類、２オキづ
二、テトラヒドロ−７ラン
クロロメタ〕、トリクロロメタン、ン・クロロエタシ、
四Ｆ．＝ 化炭素、ｌ・リクロ口プロバ二等のハロ／７
’ン化炭化水素、７メチルホル１．アミ１−、ツメチル
アセトアミド、Ｎ−メチルピロリドン、ジメヂルスルホ
キシト等やこれらの混合溶媒が使用できる。
トープ液（３）は、溶媒たけてなく、塩化リチウム、塩
化力ルシウ１、、過塩素酸マクネシウｚ．Ｗの混合１可
能な塩類等またはその水溶液を含有していてもよい。な
お、トープ液（３）は適宜の粘度を有していればよいか
、通常、数千〜数万センチボイズのものか好適に使用さ
れる。
トープ液（３）の流延塗布量は、膜の形成が司能である
限り特に制限されないが、通常、膜ＷＯ．Ｏ５〜０．５
ｍｍ程度である。
上記塗布工程で支持布（１）にドープ液（３）を流延塗
布した後、塗布層厚調整」−、程では、ドープ液供給ス
リノｔｉ４１の直下に配設され、かつ支Ｃ７ 缶（１）
の１１１給ｈ−向と直交する方向に支持１ｉ （１！の
波形列に追従して７１．復動する塗作層厚１に１整１に
． （、’）ｌて１・−ブｌ伎の塗ｎｉｌｉ＆卸′を規
制している。より詳細には、第″．２図１示されるよう
に、塗ｒｌｒ層厚調整ｔ’，： （ｂｌの端部両側には
前記支？ｌｊ ｎ−ｉ （１）の両側部表面と当接する
追（・′ｆ凹凸部５ａ）かＩｌユ成されている。ｉｌＸ
−、て、塗（１１層１￥’ 、１１．−１整ト，コ（５
１の追従凸部（５ａ）を支持（ｌｉ （１）の両側部に
当接させた状態で、支持布（１）をトうｊ、（２）で搬
送りつー）供ｉ，′ｌすると、塗布層厚調整板（ｂ）は
、支持布（１）の波形１゛追従して、支持布（１）のり
［行方向と直交するＪＪ向１往復動する。その際、支持
布（１）に流延塗布されたトープ液（３）の塗布層の厚
みを上記塗で１１層厚１周整板（５）で規制し，ている
ので、トープ（３）液を、支持＋ｂ （１）の波形に沿
って、追従凸部（５ａ）の高さＨｌに応（た厚みて均一
に塗４１てきる。
そして、凝固工程では、上記塗／Ｉｉ層厚調整板（５］
の下流側に形成された凝固液供給スリット（７）から凝
固液（６）を供給して塗布層を凝固させるとＪ４に、塗
布トープ層の完全凝固を、槽り１１）に貯溜された凝固
ｌｆ＆（１２）に浸漬して行なう。その際、支持布（１
）の波形に沿−〕で均一な厚みて形成された塗布層に凝
固液（（つ）を供給すると、塗布層表面か直ちに凝固し
２、￥布層のだれを抑制しつつＶ固層を形成できる。ま
た、該凝固鳴と、凝固液供給スリン）−（７１のド流に
位置するカーテン状のカイト壁（８）との間に凝固ｌ（
ν（６）か介在１．た法帖て、支持布（１）が走行し、
−・定距離離れた凝固槽（１１）内に到達し、凝固液（
１２）により膜全体の凝固か完工する。なお、図中、符
号（１３）は搬送ローラである。
なお、凝固液を、所定厚みに塗布されたドープ表面との
接触を保ちなから等速で流トさせるため、カイト壁（８
）は、網目状、又は鉛直方向に多数の細条体か並設し、
かつ重工したクリル状に形成されているのか好ましい。
なお、ガイド壁（８）は、面一なシー トや平板なとて
構成してもよい。このガイド壁（８）は、トープ表面か
ら１ ｍｍ以上隔てて鉛直に垂ドして凝固ｌ０（１１）
に至らせるのが好ましい。
凝固液供給スリット（７）からの凝固液（６）と凝固槽
（１１）の凝固液（１２）とは、同一であってもよく異
なっていてもよく、トープ液（３）の組成に応した１１
で來慣用の凝固液、例えは水、水と[Industrial Field of Application] The present invention relates to a method for manufacturing a corrugated membrane useful for use in membrane separation devices. [Prior Art and Problems to be Solved by the Invention] Conventionally, various types of modules, such as spiral warrant type, laminated type, and pleated type, have been used in membrane separation devices using flat membranes. In addition, in these Moneurs, spacers are interposed between the passage and the crotch to ensure a flow path for the stock solution. However, if a spacer is used, modularization and
This is complicated and costly. Therefore, two corrugated membranes,
Alternatively, by using a corrugated membrane and a flat membrane as a pair and ensuring a large number of parallel flow paths formed between both membranes, the spacer can be omitted, the membrane area can be increased, and the flow of the stock solution can be evenly distributed. Membrane elements have been proposed. On the other hand, the above-mentioned corrugated membrane is prepared by applying a film-forming dope to a flat support (Ii), immersing it in a coagulating liquid and drying it to produce a flat membrane, and then sandwiching the flat membrane with corrugated rolls etc. , can be manufactured by continuous embossing. However, with this method, the water flow rate of the membrane decreases due to embossing, and it is difficult to form a uniform membrane. Furthermore, it is difficult to form a uniform membrane. Since a manufacturing process and an embossing process are required, the number of processes increases and productivity decreases.In addition, the corrugated film and flat film made in this way are
When H is pressed, a parallel flow path is formed between the troughs of the corrugated membrane and the back surface of the filter membrane. The parallel channels extend linearly in one direction independently from each other, with adjacent channels separated. In this way, in the parallel channels, the stock solution flows through the same partitioned channel, so the flow of the stock solution is greatly influenced by the shape and accuracy of the parallel channels. In addition, since each flow path is independent, there is no opportunity for redistribution between the flow paths, and the separation performance of all the flow paths of the entire membrane is maintained evenly. lower than if done in In view of the above points, the present inventor previously proposed a molded membrane element provided with a communication path that allows parallel flow paths to communicate in the lateral direction (see Japanese Patent Publication No. 11922/1983). According to this molded membrane element, since the communicating passage is formed, the stock solution flowing through the parallel channels can be redistributed while being guided in the lateral direction by the communicating passage, and the flow of the stock solution can be equalized. However, in the above-mentioned formed membrane element, since the communication passages are formed by a heat breath after producing a corrugated membrane, the dense skin layer on the membrane surface is damaged and does not crystallize, resulting in a uniform separation membrane.
'F is difficult to manufacture, and the separation efficiency of the membrane decreases. Furthermore, since the communicating passages that communicate the parallel channels in the horizontal direction are formed by using a heat press, the cost increases due to the increase in the height, and it is difficult to form the communicating passages with precision in the size and section thereof. Therefore, it is an object of the present invention to provide a method for manufacturing a corrugated membrane that can continuously manufacture a uniform corrugated membrane with excellent separation ability without reducing the JM of the membrane. Another object of the present invention is to use a corrugated membrane that can be used in combination with a flat membrane to redistribute the stock solution flowing through the parallel channels to equalize the flow, and that is uniform and has excellent separation ability. The object of the present invention is to provide a method for manufacturing a corrugated membrane that can be manufactured continuously. [Means and effects for solving the problem] In general, even if dope is applied to an uneven surface such as a corrugated support cloth to a uniform thickness, the surface tension of the dope itself tends to flatten the dope surface. The thickness of the applied tope layer loses its uniformity during application due to the force of gravitational force and the force of flowing down due to gravity. After applying the door f to a uniform thickness, the coagulation liquid is brought into contact with the surface of the 1-film to solidify the surface of the 1-film, thereby controlling the flow of the gutter. They discovered that it was possible to continuously produce a film of approximately uniform thickness on a corrugated support fabric, and completed the present invention.That is, the present invention involves applying a film-forming tope to a support fabric formed into a corrugated cross-section. A method for producing a corrugated film, which includes a coating step of applying the coating layer, a coating layer thickness adjustment step of making the thickness of the coating layer uniform along the corrugation of the support cloth, and a coagulation step of coagulating the coating layer with a coagulating liquid. The present invention also provides a corrugated layer that forms a concave portion in a direction transverse to the corrugated row at least at the top of the applied layer formed along the corrugated pattern of the support fabric in the applied layer thickness adjustment step. The above problem is solved by the method for manufacturing a film. According to the method for manufacturing a corrugated film having the above structure, after applying the dope to the support cloth formed into a corrugated shape in the coating process, a coating layer thickness adjustment process fY is performed. Then, adjust the thickness of the j, fi ni layer uniformly along the waveform of the support 1916, and solidify the coating 41 layer by solidification i1M at about solidification 1, so try Song Dynasty-);・1
'After the film is manufactured, uniform crotches can be continuously manufactured without applying embossing force using a corrugated roll or the like. In addition, in the coating layer thickness adjustment step, the waveform of the support 11i (out of the coating layer formed along: J>fA Unlike the method of forming communication parts using a heat breath after fabrication, the -7 fabric layer is solidified after forming the recesses to produce a corrugated membrane, so a uniform membrane can be formed without damaging the membrane. When the thus obtained corrugated membrane and flat membrane are combined to form a separation membrane, the liquid flows through parallel channels extending linearly through the recesses formed at the top of the corrugations. The undiluted solutions flowing in adjacent parallel flow paths are combined, the undiluted solutions are separated into peaks, and the flow of the undiluted solutions is equalized. [Example] The present invention will be described in more detail below based on the accompanying drawings. In order to facilitate understanding, the same elements will be described with the same number n. Fig. 1 is a schematic vertical cross-sectional view showing an embodiment of the present invention.
In this example, the support cloth is supplied with the waveform array extending in a direction perpendicular to one crosspiece feeding direction of the support cloth. The coating (approximately 11L has developed into an r/m waveform, and the supporting cloth (1
) is conveyed by a torpedo (2) that has a corrugated surface adapted to the corrugated row of the support (11) and is supplied in a direction perpendicular to the corrugated row, and the dope solution (3) is supplied as a dope. The dope solution (3) is supplied from the slit (4) 1, and the dope solution (3) is cast onto the support fabric (1). , polyolefin fibers such as polypropylene, polynisdels such as polyethylene terephthalate, woven fabrics and non-woven fabrics such as nylon fibers, and the like. It is usually a solution of 10 to 30 polymers.
It contains about 2% by weight. The polymer is not particularly limited as long as it is a film-forming material, and examples thereof include acrylic polymers such as polyacrylic acid ester, polymethacrylic ester, polyhinyl al-fur, polyhinyl formal, and ethylene-hinyl alcohol (polymer Vinyl polymers, such as styrene-acrylonitrile copolymers and styrene-7-butadiene copolymers, polyacrylonitrile old copolymers, polyethers, polyether-1-, polyesters, boria El,
Examples include cellulose-based polymers such as polyimide, polysulfone, polyethersulfone polymer, cellulose acetate, and cellulose acetate acetate. These polymers can be used alone or in combination of two or more. As the solvent, a good solvent for the polymer can be used, but a swelling agent or the like may be added to this. Examples of the solvent include water, methanol, ethanol, alcohols such as propatool, butanol, and cyclohexanol, ethylene glycol, ethylene glycol monoalkyl ether, and derivatives thereof, ace)di, methylethyl)r'l.;, :Talohexano:. ．． ．． Ketones of W, methyl acetate, ethyl acetate, acid-resistant propyl esters, 2-oxychloride, tetrahydro-7-chloromethane], trichloromethane, chloromethane,
Four F. = halo of carbon, l, chloride, etc./7
7-methylform 1. Ami-1-, trimethylacetamide, N-methylpyrrolidone, dimedyl sulfoxide, etc., and mixed solvents thereof can be used. The tope solution (3) contained no solvent, lithium chloride, 1% chloride, 3% magnesium perchlorate. It may contain salts etc. that can be mixed with W or an aqueous solution thereof. Note that the tope liquid (3) may have a suitable viscosity; normally, one having a viscosity of several thousand to several tens of thousands of centimeters is preferably used. The amount of the tope solution (3) to be cast is not particularly limited as long as it can form a film, but it is usually applied in a film WO. O5~0.5
It is about mm. After casting the dope solution (3) on the support cloth (1) in the above coating process, in the coating layer thickness adjustment step, a support C7 can (1 )
Support 1i in the direction perpendicular to the 111 feeding h-direction of (1!) Following the waveform train of 71. 2. As shown in Fig. 1, the coating layer thickness adjustment t': -i (1) The additions (・'f uneven portions 5a) that come into contact with the surfaces of both sides are formed.ilX
-, te, coating (11 layers 1 ¥', 11.-1 set, ko (5
When the supporting fabric (1) is conveyed by tow j, (2) with the follower convex portions (5a) of No. 1 in contact with both sides of the support (li (1)), The coating layer thickness adjusting plate (b) follows the waveform 1 of the support cloth (1) and reciprocates once in the JJ direction perpendicular to the row direction. At that time, the thickness of the coating layer of the tope liquid (3) cast-coated on the support fabric (1) is regulated by the 11-layer thick one-round adjustment plate (5), so that the tope (3) The liquid is uniformly applied 41 along the waveform of support +b (1) with a thickness corresponding to the height Hl of the follower convex portion (5a). Then, in the solidification step, the above coating/Ii layer thickness adjustment is performed. Board (5)
When the coagulating liquid (6) is supplied from the coagulating liquid supply slit (7) formed on the downstream side of the coating layer to coagulate the coating layer, the coating layer is completely solidified in J4. This is done by immersing it in lf&(12). At that time, support cloth (1
When the coagulating liquid (() is supplied to the coating layer formed with a uniform thickness along the waveform of ), the surface of the coating layer immediately coagulates (2), and the V solid layer is formed while suppressing the sagging of the fabric layer. In addition, a coagulation l(
ν(6) or intervention 1. The support cloth (1) runs,
- Reaches the coagulation tank (11) a certain distance away, and the coagulation liquid (
12) to solidify or complete the entire membrane. In addition, in the figure, the code|symbol (13) is a conveyance roller. In addition, in order to flow the coagulation liquid at a constant speed while maintaining contact with the dope surface coated to a predetermined thickness, the kite wall (8
) has a mesh shape or a large number of strips arranged in parallel in the vertical direction,
It is also preferable that it is formed into a heavily engineered cryl shape. Note that the guide wall (8) may be configured as a flat sheet or flat plate. This guide wall (8) hangs vertically at a distance of 1 mm or more from the surface of the tope to solidify l0 (11).
It is preferable to let it reach. The coagulating liquid (6) from the coagulating liquid supply slit (7) and the coagulating liquid (12) in the coagulating tank (11) may be the same or different, depending on the composition of the tope liquid (3). 11
Commonly used coagulating liquids, such as water, water and
【イ機溶剤との混合
溶媒や、膨潤剤を含（了する水溶液、無機塩水溶液等か
、所望する膜の性質に応して適宜使用できる。
なお、凝固槽（１１）の凝固液（１２）は、主に粁済的
理由から、水を使用する場合か多し）。凝固上程の後、
通常乾燥工程に供され、波形膜か得られる。従って、従
来のように、平膜を製造した後、波形ロール等でエンボ
ス加圧することなく、塗（Ｉｉ Ｔ−程と、塗布層厚調
整工程と、凝固工程とに支持布（１）を連続的に供給す
ることにより、均一な膜を連続的に製造できる。得られ
た波形膜（１１）は、第３図（こ示されるように、波形
の支持布（１）と、該支持布（１）に均一に形成され、
かつ損傷のない膜（９）とて構成されており、分離能に
優れている。
第４図は本発明の他の実施例を示す概略斜視図であり、
この例では、前記実施例とは異なり、波形に成形された
支持布（１）の波形列か、支持布（１）の供給方向と同
し方向に延びた状態で支持布（１）を供給している。ま
た塗布工程でドープ液（３）をドープ液供給スリ、ノド
（４）を通し７て支ｔ′Ｔｎｉ （１１に流延ｙｉ布し
た後、塗布層厚４周整［ｆ〜“では、波形の端部を白゛
する塗（］１１層厚調整板１５）で、支持ｎｉ （１１
の波形に沿って、均一な塗缶厚に調整している。すなわ
ち、塗布層厚調整板り１５）の端部は、支持１’ｌｉ
（１１の波形列に々ｌ応して波１１：ｌこ形成されてい
ると１（に、両側部に、前記と同様に支持布１（１）と
当接する凸部（１５ａ）か形成されている。従って、塗
布層厚調整板（１５）を支持布（１）の１杖給方向と直
交する方向に固定して配設すると、塗４１層厚、凋整板
（１５）かドクターブレードと同様に機能するので、支
持布（１）の波形に沿って、【−かり、 塗？ｆｉ層厚
調整板（１５）の凸部（１５ａ）の高さに応【５た均一
な塗布層を形成できる。
また凝固■、程では、前記と同様に、凝固液（６）で塗
４１層を凝固させている。
このような製造り法でも、塗布層厚１週整板（１５）の
前記支持布（１）側の端部の形状を、支持布（１）の波
形に対応する■ニ状とするたけて、前記第３図に示す構
造の波１１三咬を容易かつ連続的に製造できる。
４１５図は、本発明のさらに他の実施例において使用さ
れる塗布層厚１周整板を小ず斜視図である。
この例では、前記第２図に示される塗（’ｌ、層厚１周
整仮に代えて、第５図に；ｊ：、ず塗ｒｌ’ｉ層厚１７
．１整仮（２５）！ｅＩＩ＋い、支持布（１）の波Ｉｉ
ニに沿って形成したｐＨｎｉ層に、波形タリを横断する
方向に凹溝を形成し、でいる。Ａなわち、前記第１図に
示す実施例と同様に、？ｒ （＋層厚１γｊ整板（２５
）の端部両側には前記支持？’ｌｉ （１１の両側部表
面と当接する追従凸部（２５ａ）か形成されていると共
に、端部の所定部には、追ｉｉｔ凸部（２５ａ）より（
、高さか小さな凹部Ｉ’ｌニ成ＩＩ凸部（２５ｂ ）か
形ｈ’；；されている。従っ−Ｃ，ｆ８１図に示す実雁
例と同（，１にして、塗布層厚調整板（２５）の追従２
１１部（２５ａ）を支持４ｉ （１１の両側部に当接さ
ぜた状態て、支持ｎｉ （１）をトう１．、 （２）で
搬送しつつ（）１、給すると、塗布層厚調整板（２５）
は、支持布（１）の波形に灯心［、で、支持的（１）の
供給方向光直交する方向に往復動する。その際、支持布
（１）に流延塗布された塗布層の厚みを２ｆｉ布層厚調
整板（２５）で規制すると、追従凸部（２５ａ）の高さ
Ｈｌと凹部形成用凸部（２５ｂ）の高さＨ２とが、Ｈｌ
＞Ｈ２の関係にあるので、４−記追従凸部（２５ａ）
の高さＨｌに応した塗布厚てドープ液（３）を塗布でき
ると共に、Ｈｌ−Ｈ２に応した深さの凹溝か、支持布（
１）の供給方向、すなわち支持布（１）の波形列と直交
する方向に形成される。
また凝固工程で、前記と同様に、凝固液（６）を供給し
て塗布層を凝固させ、乾燥させると、第６図に示される
ように、波形の支持布（１）に形成された膜（１９）の
うち波形列（２０ａ） （２０ｂ）と直交する方向に、
凹溝（２１）が形成された波形膜（２２）が得られる。
この凹溝（２１）は、塗布層厚調整工程で凹溝を形成し
、その後、凝固液（６）で凝固させることにより形成す
るので、膜の損傷がなく均一で、しかも凹溝（２１）部
も分離膜として機能させることができる。従って、この
ようにして製造された波形膜（２２）と平膜（２３）と
を組合せると、波形膜（２２）は、その波形頂部で平膜
（２３）と接触するので、互いに区画された並列流路（
２４ａ） （２４ｂ）が形成される。そして、１つの並
列流路（２４ａ）に流入した原液は、該並列流路（２４
ａ）と直交する方向に形成された凹溝（２１）を通じて
隣り合う並列流路（２４ｂ）に流入する。すなわち、凹
溝（２１）は並列流路を連通させる交流路部を構成する
。従って、上記凹溝（２１）により原液を再分配できる
と共に、原液の流れを均等化でき、濃度分極が生しるの
を防止できる。
第５図に示す例では、塗布層厚調整板により波形列と直
交する方向に凹溝を形成しているが、凹溝は、所定形状
のロールを用いて形成してもよい。
第７図は本発明の他の実施例を示す概略縦断面図、第８
図はロールの概略斜視図である。この例では、第１図に
示す方法と同様にして、塗布工程で波形に成形された支
持布（１）にドープ液（３）を塗布し、塗布層厚調整工
程で、第２図に示されるのと同様の塗布層厚調整板（５
）を用いて、ドープ液（３）の塗布厚を、支持布（１）
の波形に沿って均一にする。そして、塗布層、すなわち
塗布ドープ表面が、未だ十分に凝固していない段階で、
回転可能な円筒状ロール（３１）により、塗布層に凹溝
を形成している。すなわち、上記ロール（３］）は、支
持布（１）の波形に対応して軸方向に延びる湾曲す部（
３１ａ）及び湾曲凸部（３１ｂ）で構成される波形表面
を有していると共に、外周面の円周方向には、所定間隔
毎に突条（３１ｃ）が形成されている。従って、第２図
に示す塗布層厚調整板（５）により、塗布層を支持布（
１）の波形に沿って均一にした後、回転可能なロール（
３１）を塗布層に接触させると、ロール（３１）の突条
（３１ｃ）により、塗布層のうち波形列と直交する方向
に前記と同様の凹？１ｌ（２１）を形成できる。そして
、凝固工程に供することにより、前記第６図に示される
のと同様の波形膜（２２）が得られる。
なお、上記ロール（３１）の突条（３１ｃ）は、外周面
の円周方向にリング状に形成する必要はなく、適宜の配
列形態に形成できる。例えば、突条を波形表面を有する
ロールの外周面に格子状に形成すると、波形膜の膜に上
記格子状の突条に対応した格子状凹溝を形成できる。こ
のような波形膜ては、平膜（２３）と組合せることによ
り形成された並列流路（２４ａ） （２４ｂ）に流入し
た原液が、互いに連通ずる格子状凹溝を通して合流する
ので、前記と同様に、原液を再分配させることができる
と共に、原液の流れを均等化することができる。
第９図は本発明に適用できる他のロールを示す概略斜視
図であり、並列流路（２４ａ＞ （２４ｂ）を流れる原
液か波形頂部の連通部を通して合流することに着１」シ
たものである。すなわち、円筒状のロール（３２）の波
形表面のうち湾曲凹部（３２ａ）にのみ凸部（３２ｃ）
か所定間隔毎に形成されている。このようなロール（３
２）を、第２図に示す塗布層厚調整工程により、支持布
（１）の波形に沿って形成した均一ブよ厚みの塗布層に
接触させ、前記と同様に凝固工程に供すると、第１０図
に示されるように、波形の支持布（１）に形成された膜
（３９）のうち、ロール（３２）の湾曲凹部（３２ａ）
に対応する箇所、すなわち波形膜（４２）の湾曲頂部と
その近傍には、ロール（３２）の凸部（３２ｃ）により
、波形列（４０ａ） （４０ｂ）と直交する方向に凹部
（４１）か形成される。このようにして波形膜（４２）
のうち波形頂部とその近傍に凹部（４１）を形成すると
、並列流路を流れる原液を波形頂部の凹部（４１）を通
じて合流させることができると共に、波形膜（４２）の
うち湾曲凹部に凹溝を形成する必要がないので、波形膜
（４２）の湾曲凹部を精度よく形成でき、分離能を高め
ることかできる。
なお、塗布層Ｉｖ調整り程では、塗布層のうち少なく、
！：ち「ｊ部に、波形列を横断する方向に、交流流路と
して機能する凹部を形成すればよく、並列流路を横断す
る波形膜の凹溝や凹部の方向は特に制限されない。また
前記各ロールに代えて、回転＋ｉＪ能な軸と、該軸の軸
方向に所定間隔毎に取付けられ、かつ塗布層のうち少な
くとも波形頂部と接触して凹部を形成する円盤とで構成
された凹部形成用回転部材を用いてもよい。また上記各
実施例のロール（３１）（３２）を用いる場合、第２図
に示す塗布層厚調整板（５）は必すしも必要ではない。
波形膜の波形列のピッチや高さ、前記凹溝や凹部の幅等
は適宜設定できるが、通常、波形列のピッチ１．−１５
ｍｍ、高さ０．０５−３ｍｍ、凹溝や凹部の幅１〜３
ｍｍ、凹溝や凹部の深さ０．０２〜０２ ｍｍ程度で
ある。また前記波形列を横断する凹溝や凹部の数は、並
列流路の連通性を確保できればよく特に制限されない。
また支持布は予め波形に成形されていてもよく、塗￥１
１１−程の直前に波形に成形加−Ｌしてもよい。耐圧性
を付与するためには、予め波形に成形【２、樹脂加工す
ることにより、支持布を補強しておくのか好ましい。
また前記第４図に示す実施例において、凝固液供給スリ
ットの下流側に位置するカイト壁を、支持布の波形形状
に応じて波形に形成してもよい。
上記のようにして製造された波形膜は平膜と組合せてモ
ジュール化され、スパイラル状に巻回し又は積層して使
用できる。
［発明の効果］
以上のように、本発明の波形膜の製造方法によれば、塗
布工程で断面波形に成形した支持布に膜形成用ドープを
塗布した後、塗布層厚調整上程で支持布の波形に沿って
塗布層の厚みを均一化し、凝固工程で塗布層を凝固させ
るので、従来のようにエンボス加工する必要かなく、膜
の損傷かなく、均一で分離能に優れた波形膜を連続的に
製造できる。
また塗布層厚調整工程で、支持布の波形に沿って形成し
た塗４】層のうち少なくとも頂部に、波１１ニ列を横断
するノＪ向に凹部を形成するすると、・Ｉシ膜上Ｉｌｌ
、’７せて、並列流路を流れる原液を上記凹部でｔＴ
ｊ分配して流れを均等化できると共に、ヒートブレスす
る必要かないので、均一で分離能に優れた波形膜を連続
的に製造できる。[A mixed solvent with an inorganic solvent, an aqueous solution containing a swelling agent, an inorganic salt aqueous solution, etc. can be used as appropriate depending on the desired properties of the membrane. ), water is often used mainly for commercial reasons). After the solidification process,
It is usually subjected to a drying process to obtain a corrugated membrane. Therefore, after producing a flat film as in the past, the support fabric (1) is continuously applied to the coating (Ii T- stage, coating layer thickness adjustment process, and solidification process) without applying embossing pressure using a corrugated roll or the like. A uniform membrane can be manufactured continuously by supplying the corrugated membrane (11) as shown in FIG. 1) uniformly formed,
Moreover, it is constructed with an undamaged membrane (9) and has excellent separation ability. FIG. 4 is a schematic perspective view showing another embodiment of the present invention,
In this example, unlike the previous embodiment, the support cloth (1) is supplied in a waveform array of the support cloth (1) formed into a corrugated shape or in a state extending in the same direction as the supply direction of the support cloth (1). are doing. In addition, in the coating process, the dope solution (3) is passed through the dope solution supply slot, throat (4) 7 and cast onto the support t'Tni (11), and then the coating layer thickness is adjusted 4 times [f~'', the waveform is With coating (11 layer thickness adjustment plate 15) that whitens the edges of the support ni (11
The coating thickness is adjusted to be uniform along the waveform. That is, the end of the coating layer thickness adjusting plate 15) is connected to the support 1'li.
(If the waves 11:1 are formed in accordance with the waveform rows 11 and 11, convex portions (15a) that come into contact with the support cloth 1 (1) are formed on both sides in the same manner as described above. Therefore, if the coating layer thickness adjusting plate (15) is fixedly disposed in the direction perpendicular to the direction of feeding of the supporting fabric (1), the thickness of the coating layer will be 41, and the thickness of the coating layer will be 41, depending on whether the thickness adjusting plate (15) or the doctor blade Since it functions in the same way as the support cloth (1), a uniform coating layer is created according to the height of the convex part (15a) of the coating layer thickness adjusting plate (15). In addition, in the coagulation step (1), the coating 41 layer is coagulated with the coagulation liquid (6) in the same way as described above. Even with this manufacturing method, the coating layer thickness is 1 week after the plate preparation (15). By making the shape of the end of the supporting cloth (1) side into a ∙D shape corresponding to the waveform of the supporting cloth (1), the three waves 11 of the structure shown in FIG. 3 can be easily and continuously created. Figure 415 is a small perspective view of a coating layer thickness adjustment plate used in yet another embodiment of the present invention. In this example, the coating ('l, Instead of adjusting the layer thickness by 1 round, as shown in Figure 5, the layer thickness is 17.
．． 1 Seitai (25)! eII + wave Ii of support cloth (1)
A concave groove is formed in the pHni layer formed along the diagonal in a direction that crosses the corrugated groove. A. In other words, similar to the embodiment shown in FIG. 1 above, ? r (+layer thickness 1γj plate (25
) has said support on both sides of the end? A follow-up convex part (25a) that comes into contact with the surfaces of both sides of the 'li (11) is formed, and a follow-up convex part (25a) (
, a concave portion I'l having a small height, and a convex portion II having a shape h'; Therefore, the same as the real wild goose example shown in Figure C, f81 (, 1, and the tracking 2 of the coating layer thickness adjustment plate (25)
When part 11 (25a) is placed in contact with both sides of support 4i (11) and fed (25a) while conveying support 4i (1) with tow 1., (2), the coating layer thickness Adjustment plate (25)
The wick reciprocates in the direction perpendicular to the supply direction of the support cloth (1), with the wick following the waveform of the support cloth (1). At that time, when the thickness of the coating layer cast-coated on the support cloth (1) is regulated by the 2fi cloth layer thickness adjusting plate (25), the height Hl of the follower convex part (25a) and the concave part forming convex part (25b ) is the height H2 of Hl
>H2, so the following convex portion (25a)
The dope solution (3) can be applied with a coating thickness corresponding to the height Hl of
1), that is, in a direction perpendicular to the waveform array of the support fabric (1). In addition, in the coagulation process, when the coagulation liquid (6) is supplied to coagulate and dry the coated layer in the same manner as described above, a film formed on the corrugated support cloth (1) is formed as shown in FIG. In (19), in the direction perpendicular to the waveform sequences (20a) and (20b),
A corrugated film (22) in which grooves (21) are formed is obtained. The grooves (21) are formed by forming the grooves in the coating layer thickness adjustment step and then solidifying them with the coagulating liquid (6), so that the film is not damaged and is uniform. can also function as a separation membrane. Therefore, when the corrugated membrane (22) and flat membrane (23) manufactured in this way are combined, the corrugated membrane (22) contacts the flat membrane (23) at its corrugated top, so that they are separated from each other. Parallel flow path (
24a) (24b) are formed. Then, the stock solution flowing into one parallel flow path (24a) is transferred to the parallel flow path (24a).
It flows into the adjacent parallel flow path (24b) through the groove (21) formed in the direction perpendicular to a). That is, the groove (21) constitutes an alternating current passage section that communicates the parallel flow passages. Therefore, the concave grooves (21) can redistribute the stock solution, equalize the flow of the stock solution, and prevent concentration polarization. In the example shown in FIG. 5, the grooves are formed in a direction perpendicular to the waveform array using the coating layer thickness adjustment plate, but the grooves may also be formed using a roll having a predetermined shape. FIG. 7 is a schematic vertical sectional view showing another embodiment of the present invention;
The figure is a schematic perspective view of the roll. In this example, the dope solution (3) is applied to the corrugated support cloth (1) in the coating process in the same manner as shown in Figure 1, and in the coating layer thickness adjustment process, the dope liquid (3) is applied as shown in Figure 2. Coating layer thickness adjusting plate (5
) to adjust the coating thickness of the dope solution (3) on the support cloth (1).
uniformly along the waveform. Then, at a stage where the coating layer, that is, the coating dope surface is not yet fully solidified,
Concave grooves are formed in the coating layer by a rotatable cylindrical roll (31). That is, the roll (3) has a curved portion (3) extending in the axial direction corresponding to the waveform of the support cloth (1).
31a) and a curved convex portion (31b), and protrusions (31c) are formed at predetermined intervals in the circumferential direction of the outer peripheral surface. Therefore, by using the coating layer thickness adjusting plate (5) shown in FIG.
After uniformly following the waveform in 1), roll the rotatable roll (
31) is brought into contact with the coating layer, the protrusions (31c) of the roll (31) create depressions in the coating layer in the direction perpendicular to the waveform array. 1l (21) can be formed. Then, by subjecting it to a solidification step, a corrugated film (22) similar to that shown in FIG. 6 is obtained. Note that the protrusions (31c) of the roll (31) do not need to be formed in a ring shape in the circumferential direction of the outer peripheral surface, and can be formed in an appropriate arrangement. For example, if the protrusions are formed in a lattice pattern on the outer peripheral surface of a roll having a corrugated surface, lattice-like grooves corresponding to the lattice-shaped protrusions can be formed in the corrugated film. In such a corrugated membrane, the stock solution flowing into the parallel channels (24a) and (24b) formed by combining it with the flat membrane (23) merge through the lattice-shaped grooves that communicate with each other, so that the above-mentioned effect is achieved. Similarly, the stock solution can be redistributed and the flow of the stock solution can be equalized. FIG. 9 is a schematic perspective view showing another roll applicable to the present invention, in which the stock solutions flowing through the parallel flow paths (24a> (24b) join together through the communication part of the corrugated top part). In other words, there are convex portions (32c) only in the curved concave portions (32a) of the corrugated surface of the cylindrical roll (32).
They are formed at regular intervals. Roles like this (3
2) is brought into contact with a coating layer of uniform thickness formed along the corrugation of the support cloth (1) in the coating layer thickness adjustment step shown in FIG. As shown in Fig. 10, the curved recess (32a) of the roll (32) of the membrane (39) formed on the corrugated support cloth (1)
In other words, at the curved peak of the corrugated film (42) and its vicinity, the convex portion (32c) of the roll (32) creates a concave portion (41) in a direction perpendicular to the corrugated rows (40a) and (40b). It is formed. In this way the corrugated membrane (42)
If a recess (41) is formed at the top of the corrugation and in the vicinity thereof, the stock solution flowing in the parallel flow path can be merged through the recess (41) at the top of the corrugation. Since it is not necessary to form a curved concave portion of the corrugated membrane (42), it is possible to form the curved concave portion of the corrugated membrane (42) with high accuracy, and the separation ability can be improved. In addition, in the coating layer Iv adjustment step, the coating layer has a small amount,
! : It is sufficient to form a recessed portion functioning as an AC flow path in the direction that crosses the waveform rows in the j section, and the direction of the grooves or recessed portions of the corrugated film that cross the parallel flow paths is not particularly limited. In place of each roll, a recess formation system is constructed of a shaft capable of rotation + iJ and disks attached at predetermined intervals in the axial direction of the shaft and contacting at least the corrugated top of the coating layer to form a recess. Further, when using the rolls (31) and (32) of each of the above embodiments, the coating layer thickness adjusting plate (5) shown in FIG. 2 is not necessarily required. The pitch and height of the waveform array, the width of the grooves and recesses, etc. can be set as appropriate, but usually the pitch of the waveform array is 1.-15.
mm, height 0.05-3mm, width of groove or recess 1-3
mm, and the depth of the groove or recess is approximately 0.02 to 02 mm. Further, the number of grooves or recesses that cross the waveform array is not particularly limited as long as it can ensure continuity of the parallel channels. Further, the support cloth may be formed into a corrugated shape in advance, and the coating costs ¥1.
Immediately before step 11, it may be formed into a corrugated shape. In order to impart pressure resistance, it is preferable to reinforce the support cloth by molding it into a corrugated shape [2] and processing it with resin in advance. Further, in the embodiment shown in FIG. 4, the kite wall located downstream of the coagulation liquid supply slit may be formed into a waveform in accordance with the waveform shape of the support cloth. The corrugated membrane produced as described above can be combined with a flat membrane to form a module, and can be used by spirally winding or stacking. [Effects of the Invention] As described above, according to the method for manufacturing a corrugated film of the present invention, after applying a film-forming dope to a supporting cloth formed into a corrugated cross section in the coating process, the supporting cloth is coated in the upper stage of adjusting the coating layer thickness. The thickness of the coating layer is made uniform along the waveform, and the coating layer is solidified in the coagulation process, so there is no need for embossing like in the past, and there is no damage to the membrane, creating a uniform, corrugated membrane with excellent separation performance. Can be manufactured continuously. In addition, in the coating layer thickness adjustment step, if a concave portion is formed in the J direction across the wave 11 rows at least at the top of the coating layer 4 formed along the waveform of the support cloth,
, '7, and the stock solution flowing through the parallel flow path is heated to tT in the recess.
Since the flow can be equalized by distributing the membrane, and there is no need to heat press, it is possible to continuously produce a corrugated membrane that is uniform and has excellent separation ability.
第１図は本発明の一実施例を示す概略縦断面図、第２図
は塗６１層厚調整板を示す概略斜視図、第３図は波形膜
の一例を示す概略斜視図、第４図は本発明の他の実施例
を示す概略斜視図、第５図は、本発明のさらに他の実施
例において使用される塗布層厚調整板を示す斜視図、第
６図は波形膜と平膜とを組合せた分離膜を示す概略斜視
図、
第７図は本発明の他の実施例を示す概略縦断面図、
第８図はロールの概略斜視図、
第９図は本発明に適用できる他のロールを示す概略斜視
図、
第１０図は波形膜の他の例を示す概略斜視図である。
（１）・支持布、（３）・ トープ液、１ｓ）（＋５＞
（２５） 塗布層厚調整板、（ら） 凝固液、（９）
（＋９）（３９） 膜、
（２０ａ） （２０ｂ）（４０ａ）（４０ｂ）−波形列
、（ｉ ＋）（２２） （４２） 波形膜、（２１）
凹溝、（３１）（３２） ロール、（４１）凹部特許
出願人 ダイセル化を王業株式会′ｆ−１代 理
人 弁理上 鍬 ［Ｔｌ 充 １１
第
図
第４図
第
図
第
図
第
図
第
図
第
図FIG. 1 is a schematic longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a schematic perspective view showing a 61-layer coating thickness adjusting plate, FIG. 3 is a schematic perspective view showing an example of a corrugated film, and FIG. 4 5 is a schematic perspective view showing another embodiment of the present invention, FIG. 5 is a perspective view showing a coating layer thickness adjustment plate used in still another embodiment of the present invention, and FIG. 6 shows a corrugated film and a flat film. FIG. 7 is a schematic vertical sectional view showing another embodiment of the present invention, FIG. 8 is a schematic perspective view of a roll, and FIG. 9 is a schematic perspective view showing other embodiments of the present invention. FIG. 10 is a schematic perspective view showing another example of a corrugated film. (1)・Support cloth, (3)・Tope liquid, 1s) (+5>
(25) Coating layer thickness adjustment plate, (ra) Coagulation liquid, (9)
(+9) (39) Membrane, (20a) (20b) (40a) (40b) - Waveform sequence, (i +) (22) (42) Waveform membrane, (21)
Concave groove, (31) (32) roll, (41) concave patent applicant Daicel conversion to Ohgyo Co., Ltd.'f-1 agent
Person Patent Law Hoe [Tl Mitsuru 11
Figure Figure 4 Figure Figure Figure Figure Figure
Claims (1)
する塗布工程と、支持布の波形に沿って塗布層の厚みを
均一化する塗布層厚調整工程と、凝固液で塗布層を凝固
させる凝固工程とを含むことを特徴とする波形膜の製造
方法。 ２、塗布層厚調整工程で、支持布の波形に沿って形成し
た塗布層のうち少なくとも頂部に、波形列を横断する方
向に凹部を形成する請求項１記載の波形膜の製造方法。[Claims] 1. A coating step of applying a film-forming dope to a support cloth formed into a corrugated cross-sectional shape, a coating layer thickness adjustment step of making the thickness of the coating layer uniform along the waveform of the support cloth, and a coagulation step. A method for producing a corrugated film, comprising a coagulation step of coagulating a coating layer with a liquid. 2. The method for manufacturing a corrugated film according to claim 1, wherein in the coating layer thickness adjustment step, a concave portion is formed in at least the top portion of the coating layer formed along the corrugation of the support cloth in a direction transverse to the corrugation row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12166090A JPH0418923A (en) | 1990-05-11 | 1990-05-11 | Production of corrugated membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12166090A JPH0418923A (en) | 1990-05-11 | 1990-05-11 | Production of corrugated membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0418923A true JPH0418923A (en) | 1992-01-23 |
Family
ID=14816746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12166090A Pending JPH0418923A (en) | 1990-05-11 | 1990-05-11 | Production of corrugated membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0418923A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5703359A (en) * | 1996-07-29 | 1997-12-30 | Leybold Inficon, Inc. | Composite membrane and support assembly |
| NL1016705C2 (en) * | 2000-11-24 | 2002-05-27 | Paques Water Systems B V | Device and method for cleaning a fluid, such as water. |
| WO2011130853A1 (en) * | 2010-04-20 | 2011-10-27 | Fibracast Ltd. | Formed sheet membrane element and filtration system |
| CN106512748A (en) * | 2016-11-02 | 2017-03-22 | 北京碧水源膜科技有限公司 | Plate-shaped corrugated membrane diaphragm having uniform aperture and preparation method thereof |
| US9878292B2 (en) | 2010-11-05 | 2018-01-30 | Nitto Denko Corporation | Method for manufacturing sheet-shaped separation membrane |
| US10105651B2 (en) | 2011-10-20 | 2018-10-23 | Fibracast Ltd. | Formed sheet membrane element and filtration system |
| FR3099383A1 (en) * | 2019-08-01 | 2021-02-05 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Method of manufacturing an exchange element of a bypass gas exchanger |
-
1990
- 1990-05-11 JP JP12166090A patent/JPH0418923A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5703359A (en) * | 1996-07-29 | 1997-12-30 | Leybold Inficon, Inc. | Composite membrane and support assembly |
| NL1016705C2 (en) * | 2000-11-24 | 2002-05-27 | Paques Water Systems B V | Device and method for cleaning a fluid, such as water. |
| WO2002041980A1 (en) * | 2000-11-24 | 2002-05-30 | Paques Water Systems B.V. | Device and method for cleaning a fluid, such as water |
| US7083729B2 (en) | 2000-11-24 | 2006-08-01 | Paques B.V. | Device and method for cleaning a fluid, such as water |
| US10478777B2 (en) | 2010-04-20 | 2019-11-19 | Fibracast Ltd. | Formed sheet membrane element and filtration system |
| WO2011130853A1 (en) * | 2010-04-20 | 2011-10-27 | Fibracast Ltd. | Formed sheet membrane element and filtration system |
| US11642628B2 (en) | 2010-04-20 | 2023-05-09 | Fibracast Ltd. | Formed sheet membrane element and filtration system |
| US9878292B2 (en) | 2010-11-05 | 2018-01-30 | Nitto Denko Corporation | Method for manufacturing sheet-shaped separation membrane |
| US10105651B2 (en) | 2011-10-20 | 2018-10-23 | Fibracast Ltd. | Formed sheet membrane element and filtration system |
| US11154817B2 (en) | 2011-10-20 | 2021-10-26 | Fibracast Ltd. | Formed sheet membrane element and filtration system |
| CN106512748A (en) * | 2016-11-02 | 2017-03-22 | 北京碧水源膜科技有限公司 | Plate-shaped corrugated membrane diaphragm having uniform aperture and preparation method thereof |
| FR3099383A1 (en) * | 2019-08-01 | 2021-02-05 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Method of manufacturing an exchange element of a bypass gas exchanger |
| EP3782719A3 (en) * | 2019-08-01 | 2021-05-19 | Commissariat À L'Énergie Atomique Et Aux Énergies Alternatives | Method for manufacturing an exchange element of an exchanger with double gas flow |
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