JP3126483B2 - Method and apparatus for producing double-sided flat membrane - Google Patents
Method and apparatus for producing double-sided flat membraneInfo
- Publication number
- JP3126483B2 JP3126483B2 JP04106371A JP10637192A JP3126483B2 JP 3126483 B2 JP3126483 B2 JP 3126483B2 JP 04106371 A JP04106371 A JP 04106371A JP 10637192 A JP10637192 A JP 10637192A JP 3126483 B2 JP3126483 B2 JP 3126483B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- support
- orifice
- sheet
- rolls
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Coating Apparatus (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は支持体の両面に平膜を有
する両面平膜の製造方法及びこの両面平膜を製造するた
めの流延装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a double-sided flat membrane having a flat membrane on both sides of a support and a casting apparatus for producing the double-sided flat membrane.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】従来よ
り使用されている支持体付きの平膜は片面にのみ膜を担
持したもので、支持体の両面に膜を一体として形成した
平膜は概念としてはあっても実用にはなかった。支持体
の片面に膜形成用のドープを均一に塗布することはさし
て困難なことではない。例えば、連続的に供給される支
持体に張力を加えながら、ロール等の進行方向と直角の
方向に、支持体を直線性の部材に押し付けることによっ
て、支持体に必要な精度の平面性を局部的に賦与して、
この部分にドクター・ブレード等を用いてドープを塗布
すれば均一な厚さにドープを塗布することは容易であ
る。2. Description of the Related Art A flat membrane with a support conventionally used has a membrane supported on only one side, and a flat membrane formed integrally with a membrane on both sides of the support is Even though it was a concept, it was not practical. It is not difficult to uniformly apply a dope for film formation on one surface of the support. For example, while applying tension to a continuously supplied support, the support is pressed against a linear member in a direction perpendicular to the traveling direction of a roll or the like, so that the flatness required for the support is locally adjusted. To grant
If a dope is applied to this portion using a doctor blade or the like, it is easy to apply the dope to a uniform thickness.
【０００３】しかし、両面に同時にドープを塗布する場
合は均一な塗布に必要な平面性を賦与するために支持体
を何かに押し付けることができない。向かい合ったドク
ター・ブレードでオリフィスを形成して、そのオリフィ
スを通すことによって塗布厚みを制御しようとしても、
シート状支持体の曲がりや反りを矯正しないままでオリ
フィスを通すため、シート状支持体がある幅に渡ってブ
レードと接触してドープの塗布が不十分となり膜に欠陥
を生じ、その裏面は不必要に厚く塗布されて本来の膜性
能を発揮しない部分ができる。However, when a dope is simultaneously applied to both surfaces, the support cannot be pressed against something in order to provide the flatness required for uniform application. If you try to control the coating thickness by forming an orifice with facing doctor blades and passing through the orifice,
Since the orifice passes through the orifice without correcting the bending or warpage of the sheet-like support, the dope is insufficiently applied due to the sheet-like support coming into contact with the blade over a certain width, causing a defect in the film, and the back surface of the film is unfavorable. There is a portion that is applied as thick as necessary and does not exhibit the original film performance.
【０００４】本発明者らは上記の欠点のない両面平膜の
製造方法について鋭意検討の結果、シート状支持体をド
ープに浸漬した二本の溝付きロールで挟圧することによ
って曲がりや反りを矯正すると同時に溝内のドープを塗
布すれば反り等のある支持体の両面に均等厚みにドープ
を塗布することが可能であること、また、溝付きロール
でドープを塗布しながら支持体を送り出すので、ドープ
塗布後の支持体を引っ張る必要はなく、膜を傷つけるこ
とを防ぐこともできることを見出した。この場合、ドー
プは塗布直後は進行方向に対して直角方向に規則的な厚
薄を繰り返すが、ドープの表面張力によって自発的に膜
厚は均等化される。このように溝付きロールで塗布する
方法において、薄いフィルムに低粘度（10-1Pas 以下）
の溶液を薄く（10μm 以下）塗るのにバー・コーターが
使用されているのは良く知られているが、膜形成用の高
粘度ドープ（数Pas 以上）を厚く（100 μm 以上）塗布
するのに使用されている例はない。しかし、実際に溝付
きロールとしてワイヤー・バーを、支持体としてポリエ
チレンテレフタレート不織布とポリプロピレン不織布
を、膜形成用ドープとしてポリエーテルスルホン、ポリ
エチレングリコール200 、ジメチルスルホキシドのそれ
ぞれ18、42、40重量％からなるドープを用いて両面塗布
を試みたところ、塗布厚は100 μm 以下の薄い膜しか得
られなかった。ワイヤー・バーの間隙を拡げていって支
持体を挟圧せず、支持体との間に空隙が生じてワイヤー
・バーによって送り出されなくなった支持体を他の手段
で引っ張って塗布しても、膜厚はワイヤー・バーの間隙
とは無関係に、100 μm 以下の略一定値に止まった。即
ち、ドープは支持体がワイヤー・バーを離れる際に支持
体に付いて行く分とワイヤー・バーに付いて行く分とに
分配されるが、両者間の間隔を変えて保持されるドープ
量を増しても支持体に付いて行くドープ分配量は殆ど変
わらず、増えた分は殆ど全部ワイヤー・バーの方に付い
て行くことが分かった。そこで、ドープとワイヤー・バ
ーの親和力を弱くする目的でワイヤー・バーにシリコー
ン樹脂のコーティングを施して、同様にワイヤー・バー
の間隔を拡げていっても膜厚は略一定で100 μm 以下で
あった。The inventors of the present invention have conducted intensive studies on a method for producing a double-sided flat film free from the above-mentioned drawbacks. As a result, the sheet-shaped support was straightened by two grooved rolls immersed in a dope to correct bending and warping. At the same time, if the dope in the groove is applied, it is possible to apply the dope to both sides of the support with warpage and the like evenly, and the support is sent out while applying the dope with the grooved roll, It has been found that it is not necessary to pull the support after the application of the dope, and it is possible to prevent the film from being damaged. In this case, the dope repeats regular thickness thinning in the direction perpendicular to the traveling direction immediately after coating, but the film thickness is spontaneously equalized by the surface tension of the dope. In the method of applying with a grooved roll as described above, low viscosity (10 -1 Pas or less) is applied to thin films
It is well known that a bar coater is used to apply a thin (less than 10 μm) solution of a high viscosity dope (more than a few Pas) for film formation (more than 100 μm). There is no example used for However, a wire bar is actually used as a grooved roll, a polyethylene terephthalate nonwoven fabric and a polypropylene nonwoven fabric are used as a support, and polyethersulfone, polyethylene glycol 200, and dimethyl sulfoxide are 18, 42, and 40% by weight of a dope for film formation, respectively. When a double-sided coating was attempted using a dope, only a thin film with a coating thickness of 100 μm or less was obtained. Even if the gap between the wire bar is expanded and the support is not pressed and the support that is no longer sent out by the wire bar due to the gap between the support and the support is pulled by other means, The film thickness remained almost constant at 100 μm or less, irrespective of the wire bar gap. That is, the dope is divided into a portion that is attached to the support and a portion that is attached to the wire bar when the support leaves the wire bar. It was found that even with the increase, the dope distribution attached to the support hardly changed, and almost all of the increase was attached to the wire bar. Therefore, even if the wire bar is coated with a silicone resin in order to weaken the affinity between the dope and the wire bar, and the distance between the wire bars is similarly increased, the film thickness is almost constant and is 100 μm or less. Was.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、更に上記
の欠点を解決すべく鋭意検討の結果、ドープの溝付きロ
ールへの分配を減らして支持体への塗布厚を増す為に
は、溝付きロールの回転を止めるか、溝付きロールへ分
配されたドープを掻き取ることが必要と考え、実際に試
して見るとどちらも有効であることが分かった。しか
し、これによって生ずる問題として、前者ではドープ塗
布後の支持体を他の方法で引き取ることが必要になる
が、塗布膜面に接触しないで引き取る簡単な方法を見出
すことは困難である。後者では溝付きロールで挟圧され
て一時的に矯正された支持体の平面性が許容範囲を越え
て低下しない間に掻き取ることと、溝付きロールの間隔
と掻き取るためのブレード等の間隔を独立に簡単に調整
できることが必要になるが、溝付きロールと同軸で回転
可能に密着外接する円筒の、円周方向に一定角度で円筒
の軸方向に平行な欠落部分を設け、該欠落部分の円筒の
軸方向に平行な一辺にドープを掻き取るブレードを設
け、該ブレード同志が対面するように該円筒を溝付きロ
ールに密着外接させることによって、溝付きロールの挟
圧部から最短距離にオリフィスを形成させることがで
き、かつ、該円筒を該溝付きロールの回りに回転させる
ことによって該オリフィスの間隙を溝付きロールの間隔
と独立に調節することができ、そのため支持体の厚さに
対応して溝付きロール間隔を種々変えても一旦設定した
オリフィスの間隙は変わらず、また、溝付きロール間隔
を固定したままで該円筒を該溝付きロールの回りに回転
させることによって該オリフィスの間隙を調節すること
も可能となり、厚みムラや凹凸、反りのない両面平膜が
得られることを見出し、本発明を完成するに至った。Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned drawbacks. As a result, in order to reduce the distribution of the dope to the grooved roll and increase the coating thickness on the support, It was considered necessary to stop the rotation of the grooved roll or to scrape off the dope distributed to the grooved roll, and it was found that both were effective when actually tested. However, as a problem caused by this, in the former, it is necessary to take out the support after dope coating by another method, but it is difficult to find a simple method of taking out the support without contacting the coated film surface. In the latter, scraping is performed while the flatness of the support, which has been temporarily corrected by being squeezed by the grooved rolls, does not decrease beyond the allowable range, and the gap between the grooved rolls and the gap between the blades for scraping off, etc. It is necessary to be able to easily and independently adjust the diameter of the cylinder. However, the cylinder which is coaxially and rotatably in close contact with the grooved roll is provided with a missing portion parallel to the cylinder axis at a constant angle in the circumferential direction and the missing portion. By providing a blade for scraping the dope on one side parallel to the axial direction of the cylinder, and by closely contacting the cylinder with the grooved roll so that the blades face each other, the shortest distance from the clamping portion of the grooved roll is obtained. An orifice can be formed, and the gap between the orifices can be adjusted independently of the grooved roll spacing by rotating the cylinder about the grooved roll, thus supporting The gap of the orifice once set does not change even if the grooved roll interval is changed in accordance with the thickness of the groove, and the cylinder is rotated around the grooved roll with the grooved roll interval fixed. It was also found that the gap between the orifices could be adjusted by this, and a double-sided flat film free from unevenness in thickness, unevenness and warpage was obtained, and the present invention was completed.
【０００６】即ち、本発明は、両面に膜を形成させるシ
ート状支持体を、膜形成溶液に浸漬した円周に平行な多
数の溝を持つ二本のロールで挟み、該溝付きロールを回
転させて該膜形成溶液を該シート状支持体の両面に連続
的に塗布させながら該シート状支持体を送り出し、該ロ
ールの直後に設けたオリフィスで塗布厚を調整すること
を特徴とする両面平膜の製造方法を提供するものであ
る。That is, according to the present invention, a sheet-like support for forming a film on both sides is sandwiched between two rolls having a number of grooves parallel to the circumference immersed in a film forming solution, and the grooved roll is rotated. The film-forming solution is continuously applied to both sides of the sheet-like support, and the sheet-like support is sent out, and the coating thickness is adjusted by an orifice provided immediately after the roll. A method for producing a film is provided.
【０００７】また、本発明は、シート状支持体の両面に
平膜を形成させる装置において、円周に平行な多数の溝
を持つ二本のロールと、ロールに同軸で回転可能に密着
外接した円筒状部材の円周方向に一定角度で円周の軸方
向に平行な欠落部分を設け、該欠落部分の円筒の軸に平
行な一辺に設けたブレードを対面させることによってオ
リフィスを形成する円筒状部材と、二本の溝付きロール
に膜形成溶液を供給する手段とを具え、該円筒状部材を
溝付きロールの回りに回転させることによって、該オリ
フィス間隙を溝付きロールの間隔と独立に調節できるよ
うにしたことを特徴とする両面平膜流延装置を提供する
ものである。Further, according to the present invention, there is provided an apparatus for forming a flat film on both surfaces of a sheet-like support, wherein two rolls having a number of grooves parallel to the circumference are coaxially and rotatably coaxially circumscribed with the rolls. A cylindrical shape in which a cutout portion is provided at a constant angle in the circumferential direction of the cylindrical member and parallel to the axial direction of the circumference, and a blade provided on one side parallel to the axis of the cylinder of the cutout portion faces the orifice. A member and means for supplying a film-forming solution to the two grooved rolls, wherein the orifice gap is adjusted independently of the grooved roll spacing by rotating the cylindrical member about the grooved roll. An object of the present invention is to provide a double-sided flat film casting apparatus characterized by being made possible.
【０００８】以下、本発明の一実施態様を図面に基づき
説明する。図１は本発明の両面平膜流延装置の一例を示
す縦断面図である、図１において、両面に膜を形成させ
るシート状支持体１は二本の回転する溝付きロール２，
２' の上に保持された膜形成溶液３の中を通り、ロール
２，２' に挟圧されて下方に送られると同時に、該ロー
ルの溝部分４に保持された膜形成溶液３が塗布され、続
いて、該ロールと同軸で回転可能に密着外接し、かつ円
周方向に欠落部分を設けた円筒からなる円筒状部材５，
５' の該欠落部分の一端に設けたブレード部６，６' を
対面させることによって形成されたオリフィス７を通過
して下方に送り出され、シート状支持体１の両面に一定
の膜厚を有する平膜８，８’が形成される。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an example of a two-sided flat film casting apparatus of the present invention. In FIG. 1, a sheet-like support 1 for forming a film on both sides is provided with two rotating grooved rolls 2.
The film-forming solution 3 held on the roll 2 'is passed through the film-forming solution 3 held by the rolls 2 and 2' while being pressed downward. Subsequently, a cylindrical member 5, which is coaxially rotatable with the roll so as to be in close contact with the roll so as to be rotatable, and which is provided with a missing portion in the circumferential direction,
5 'is sent downward through an orifice 7 formed by facing blade portions 6, 6' provided at one end of the missing portion, and has a constant film thickness on both surfaces of the sheet-like support 1. Flat films 8, 8 'are formed.
【０００９】本発明に用いられるシート状支持体として
は、特に限定されないが、ポリエチレンテレフタレート
等のポリエステル、ポリエチレン、ポリプロピレン等の
ポリオレフィン、ナイロン等のポリアミド等の１種又は
２種以上からなる不織布、または、ポリエチレン、ポリ
プロピレン、ポリエチレンテレフタレート等からなるメ
ッシュ・スクリーン、ネット状成形物のような大きな空
隙部を有する疎な構造物からなる内層と、細い繊維を使
用し目開きが小さく緻密な構造の不織布からなる表面層
とを一体に形成してなるもの等が挙げられる。The sheet-like support used in the present invention is not particularly limited, but is a nonwoven fabric made of one or more of polyester such as polyethylene terephthalate, polyolefin such as polyethylene and polypropylene, polyamide such as nylon and the like, or , A mesh screen made of polyethylene, polypropylene, polyethylene terephthalate, etc., an inner layer consisting of a sparse structure having large voids such as a net-like molded product, and a nonwoven fabric having a fine structure with small openings using fine fibers. And those formed integrally with a surface layer.
【００１０】本発明に用いられる膜形成溶液、即ちドー
プとしては、特に限定されないが、ポリエーテルスルホ
ン、ポリスルホン、ポリアクリロニトリル、ポリアミ
ド、ポリイミド、セルロースエステル等を各種溶剤に溶
解したものが挙げられる。ここで用いられる溶剤として
は、ジメチルスルホキシド、Ｎ−メチル−２−ピロリド
ン、Ｎ，Ｎ−ジメチルホルムアミド、１，４−ジオキサ
ン等が挙げられる。更にポリエチレングリコール等を添
加することもできる。The film-forming solution used in the present invention, that is, the dope is not particularly limited, and examples thereof include solutions obtained by dissolving polyethersulfone, polysulfone, polyacrylonitrile, polyamide, polyimide, cellulose ester and the like in various solvents. Examples of the solvent used here include dimethyl sulfoxide, N-methyl-2-pyrrolidone, N, N-dimethylformamide, 1,4-dioxane and the like. Further, polyethylene glycol or the like can be added.
【００１１】本発明において、オリフィスを形成するブ
レードの形状は、シート状支持体の平面性が良好で、か
つ、容易に変形しうる形状追従性に富んでいて、シート
状支持体がロールから送り出されてオリフィスを通過す
る間、ブレードと等間隔を保ち得る場合は、直線（平滑
平面）で良い。しかし、シート状支持体の腰が強く、ロ
ールで挟まれた時は強制的に平面形状になってもロール
から送り出された直後に元の形状に戻るような場合は、
シート状支持体がある幅に渡ってブレードと接触してド
ープの塗布が不十分となり膜に欠陥を生じ、その裏面は
不必要に厚く塗布されて本来の膜性能を発揮しない部分
ができる。この様な場合は、オリフィスを形成するブレ
ードの表面に流延方向と平行、即ち、円筒軸に直角に、
かつ等間隔に複数の溝を設けることが好ましい。このよ
うな溝を設けることによって、支持体がある幅に渡って
ブレードと接触しても、最低必要量のドープを塗布する
ことができ、膜の欠陥の発生を防ぐことができる。In the present invention, the shape of the blade forming the orifice is such that the flatness of the sheet-shaped support is good and the sheet-shaped support is rich in shape followability that can be easily deformed. A straight line (smooth plane) may be used if the blade can be kept at the same distance from the blade while passing through the orifice. However, in the case where the sheet-shaped support has a strong stiffness and when it is sandwiched between rolls, even if it forcibly becomes a planar shape, it returns to the original shape immediately after being sent out from the roll,
When the sheet-like support comes into contact with the blade over a certain width, coating of the dope becomes insufficient and a defect occurs in the film, and the back surface thereof is unnecessarily thickly coated to form a portion which does not exhibit the original film performance. In such a case, the surface of the blade forming the orifice is parallel to the casting direction, that is, perpendicular to the cylindrical axis.
Preferably, a plurality of grooves are provided at equal intervals. By providing such a groove, even if the support comes into contact with the blade over a certain width, the minimum necessary amount of dope can be applied, and the occurrence of film defects can be prevented.
【００１２】本発明の装置を用い、円筒状部材５，５'
の回転によりオリフィス７の間隙を調節するには、以下
の式に従って行う。即ち、 ｄ：オリフィス間隙（片側） ｒ：ロール半径 θ：ロールの中心を結ぶ直線と、ロールの中心とオリフ
ィス下端を結ぶ直線とのなす角度 ξ：オリフィス間隙の調節量（片側） χ：円筒状部材の回転距離（片側） とするとき、 ξ＝δｄ＝δ（ｒ cosθ）＝−ｒ sinθδθ δθ＝−ξ／ｒ sinθ χ＝ｒδθ＝−ξ／sinθ となり、θを小さくするとχを大きくでき、調節が楽に
なる。Using the apparatus of the present invention, the cylindrical members 5, 5 '
The following formula is used to adjust the gap of the orifice 7 by rotating. D: Orifice gap (one side) r: Roll radius θ: Angle between a straight line connecting the center of the roll and a straight line connecting the center of the roll and the lower end of the orifice ξ: Adjustment amount of the orifice gap (one side) χ: Cylindrical Assuming that the rotation distance of the member (one side), ξ = δd = δ (r cosθ) = − rsinθδθ δθ = −ξ / rsinθ ｒ = rδθ = −ξ / sinθ, and θ can be increased by decreasing θ, Adjustment becomes easy.
【００１３】[0013]
【実施例】以下、本発明を実施例により更に詳しく説明
するが、本発明はこれらの実施例に限定されるものでは
ない。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.
【００１４】実施例１〜３ 図１に示す装置で、シート状支持体１として、厚さ0.6
mm、目開き 1.5×2.0mmの高密度ポリエチレン製ネット
を芯層としてその両面に厚さ0.1 mm、坪量90ｇ／m2のポ
リエステル不織布を重ねた複合シートを、膜形成溶液３
として、ポリエーテルスルホン、ポリエチレングリコー
ル200 、ジメチルスルホキシドのそれぞれ18、42、40重
量％からなるドープを、溝付きロール２、２' として直
径50mmのロールに直径1.8 mmのステンレス・スチール製
針金を巻き付けたワイヤー・バーを、円筒状部材５、
５' として、ランド長３mmのブレードを形成したポリオ
キシメチレン製の縦割り円筒をそれぞれ用いて、ロール
間隔0.8 mm、オリフィス間隙を1.2 、1.4 、1.6 mmの各
条件に設定して流延し、20cm下の室温の水中に進入させ
ることによって、塗布されたドープを凝固させて平板状
複合支持体の両面に半透膜を形成した。残留溶剤を十分
に洗い出した後、二枚の不織布補強膜と芯層の三枚に剥
がして、膜厚、純水透過流束、及び牛血清アルブミンを
pH6.7 のリン酸緩衝液に濃度100ppmで溶解した溶液の透
過流束と溶質透過率を測定した。結果を表１に示す。Embodiments 1 to 3 In the apparatus shown in FIG.
mm, mesh 1.5 × 2.0 mm thickness 0.1 mm high-density polyethylene net on both sides as a core layer, a composite sheet of repeated polyester nonwoven fabric of basis weight 90 g / m 2, film forming solution 3
A dope consisting of 18, 42 and 40% by weight of polyether sulfone, polyethylene glycol 200 and dimethyl sulfoxide, respectively, and a 1.8 mm diameter stainless steel wire wound around a 50 mm diameter roll as grooved rolls 2 and 2 '. The wire bar is connected to the cylindrical member 5,
As 5 ', using a vertical cylinder made of polyoxymethylene formed with a blade having a land length of 3 mm, casting was performed with the roll spacing set to 0.8 mm and the orifice gap set to 1.2, 1.4, and 1.6 mm, respectively. The applied dope was coagulated by entering water at room temperature below 20 cm to form a semipermeable membrane on both surfaces of the flat composite support. After the residual solvent has been sufficiently washed out, peel off the two nonwoven fabric reinforcing membranes and three core layers to remove the film thickness, pure water permeation flux, and bovine serum albumin.
The permeation flux and solute permeability of a solution dissolved in a pH 6.7 phosphate buffer at a concentration of 100 ppm were measured. Table 1 shows the results.
【００１５】参考例 実施例１〜３に使用したのと同じ不織布と同じドープを
用いて、通常の平膜を流延する定法で、不織布の片面に
膜を有する平膜を作成した。この膜を用い、実施例１〜
３と同様に膜厚、純水透過流束、及び牛血清アルブミン
の透過流束と透過率を測定した。結果を表１に示す。Reference Example Using the same non-woven fabric and the same dope used in Examples 1 to 3, a flat film having a film on one side of a non-woven fabric was prepared by a usual method of casting a normal flat film. Using this film, Examples 1 to
In the same manner as in Example 3, the film thickness, the permeation flux of pure water, and the permeation flux and transmittance of bovine serum albumin were measured. Table 1 shows the results.
【００１６】[0016]
【表１】 [Table 1]
【００１７】表１から明らかなように、本実施例で得ら
れた両面平膜は、参考例で得られた片面平膜とほぼ同等
の性能を有する。As is clear from Table 1, the double-sided flat film obtained in this example has almost the same performance as the single-sided flat film obtained in the reference example.
【図１】本発明の両面平膜流延装置の一例を示す縦断面
図である。FIG. 1 is a longitudinal sectional view showing an example of a two-sided flat film casting apparatus of the present invention.
１ シート状支持体 ２, ２' ロール ３ 膜形成溶液 ４ ロールの溝部分 ５, ５' 円筒状部材 ６, ６' ブレード部 ７ オリフィス ８，８’膜 DESCRIPTION OF SYMBOLS 1 Sheet-shaped support 2, 2 'roll 3 Film forming solution 4 Roll groove part 5, 5' Cylindrical member 6, 6 'Blade part 7 Orifice 8, 8' film
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 69/06 B01D 63/08 B05C 3/12 Continuation of front page (58) Field surveyed (Int.Cl. 7 , DB name) B01D 69/06 B01D 63/08 B05C 3/12
Claims (3)
を、膜形成溶液に浸漬した円周に平行な多数の溝を持つ
二本のロールで挟み、該溝付きロールを回転させて該膜
形成溶液を該シート状支持体の両面に連続的に塗布させ
ながら該シート状支持体を送り出し、該ロールの直後に
設けたオリフィスで塗布厚を調整することを特徴とする
両面平膜の製造方法。1. A sheet-like support on which a film is formed on both sides is sandwiched between two rolls having a number of grooves parallel to the circumference immersed in a film forming solution, and the film-formed film is rotated by rotating the grooved roll. A method for producing a double-sided flat film, comprising feeding a sheet-like support while continuously applying a forming solution to both sides of the sheet-like support, and adjusting a coating thickness by an orifice provided immediately after the roll. .
両面に平膜を形成させる装置において、円周に平行な多
数の溝を持つ二本のロールと、ロールに同軸で回転可能
に密着外接した円筒状部材の円周方向に一定角度で円周
の軸方向に平行な欠落部分を設け、該欠落部分の円筒の
軸に平行な一辺に設けたブレードを対面させることによ
ってオリフィスを形成する円筒状部材と、二本の溝付き
ロールに膜形成溶液を供給する手段とを具え、該円筒状
部材を溝付きロールの回りに回転させることによって、
該オリフィス間隙を溝付きロールの間隔と独立に調節で
きるようにしたことを特徴とする両面平膜流延装置。2. An apparatus for forming a flat film on both surfaces of a sheet-like support according to the method of claim 1, wherein the two rolls have a number of grooves parallel to the circumference, and are rotatable coaxially with the rolls. An orifice is formed by providing a missing portion parallel to the circumference of the cylindrical member at a fixed angle in the circumferential direction of the cylindrical member in close contact and circumscribing, and facing a blade provided on one side parallel to the axis of the cylinder of the missing portion. A cylindrical member, and means for supplying a film-forming solution to two grooved rolls, by rotating the cylindrical member around the grooved roll,
A double-sided flat film casting apparatus wherein the orifice gap can be adjusted independently of the interval between the grooved rolls.
直角に、かつ等間隔に設けられた複数の溝を有すること
を特徴とする請求項２記載の装置。3. The apparatus according to claim 2, wherein the surface of the orifice has a plurality of grooves provided at right angles to the axis of the cylindrical member and at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04106371A JP3126483B2 (en) | 1992-04-24 | 1992-04-24 | Method and apparatus for producing double-sided flat membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04106371A JP3126483B2 (en) | 1992-04-24 | 1992-04-24 | Method and apparatus for producing double-sided flat membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05301031A JPH05301031A (en) | 1993-11-16 |
| JP3126483B2 true JP3126483B2 (en) | 2001-01-22 |
Family
ID=14431869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04106371A Expired - Fee Related JP3126483B2 (en) | 1992-04-24 | 1992-04-24 | Method and apparatus for producing double-sided flat membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3126483B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100624173B1 (en) | 2005-06-01 | 2006-09-19 | 서광석 | Method for in-line coating without surface crack |
| CN1322191C (en) * | 2002-03-28 | 2007-06-20 | 兄弟工业株式会社 | Threading device of sewing machine |
| CN1325719C (en) * | 2002-03-28 | 2007-07-11 | 兄弟工业株式会社 | Threading device of sewing machine |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2859114B1 (en) * | 2003-08-28 | 2005-10-14 | Gambro Lundia Ab | FILTRATION DEVICE COMPRISING A SEMI-PERMEABLE MEMBRANE FOR THE EXTRACORPOREAL TREATMENT OF BLOOD OR PLASMA, PARTICULARLY PREVENTING THE DELAYED ACTIVATION OF THE CONTACT PHASE |
| US20050045554A1 (en) | 2003-08-28 | 2005-03-03 | Gambro Lundia Ab | Membrane unit element, semipermeable membrane, filtration device, and processes for manufacturing the same |
| EP1626109A1 (en) * | 2004-08-11 | 2006-02-15 | "VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK", afgekort "V.I.T.O." | Web-reinforced separator and continuous method for producing same |
| EP1625885A1 (en) * | 2004-08-11 | 2006-02-15 | Vlaamse Instelling Voor Technologisch Onderzoek (Vito) | Integrated permeate channel membrane |
| BRPI0912078A2 (en) * | 2008-06-02 | 2016-08-16 | Agfa Gevaert Nv | apparatus and process for producing an ion permeable web reinforced separator and separator obtained therefrom |
| US9643129B2 (en) | 2011-12-22 | 2017-05-09 | Bl Technologies, Inc. | Non-braided, textile-reinforced hollow fiber membrane |
-
1992
- 1992-04-24 JP JP04106371A patent/JP3126483B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322191C (en) * | 2002-03-28 | 2007-06-20 | 兄弟工业株式会社 | Threading device of sewing machine |
| CN1325719C (en) * | 2002-03-28 | 2007-07-11 | 兄弟工业株式会社 | Threading device of sewing machine |
| KR100624173B1 (en) | 2005-06-01 | 2006-09-19 | 서광석 | Method for in-line coating without surface crack |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05301031A (en) | 1993-11-16 |
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