JPS6115705A - Support for reinforcing semipermeable membrane - Google Patents
Support for reinforcing semipermeable membraneInfo
- Publication number
- JPS6115705A JPS6115705A JP13532384A JP13532384A JPS6115705A JP S6115705 A JPS6115705 A JP S6115705A JP 13532384 A JP13532384 A JP 13532384A JP 13532384 A JP13532384 A JP 13532384A JP S6115705 A JPS6115705 A JP S6115705A
- Authority
- JP
- Japan
- Prior art keywords
- semipermeable membrane
- support
- reinforcing
- concavities
- nonwoven fabric
- 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
- 239000012528 membrane Substances 0.000 title claims abstract description 39
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims 1
- 239000004745 nonwoven fabric Substances 0.000 abstract description 12
- 239000000835 fiber Substances 0.000 abstract description 7
- 239000011148 porous material Substances 0.000 abstract description 5
- 238000004873 anchoring Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 abstract 1
- 239000002759 woven fabric Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【発明の詳細な説明】
（技術の背景）
本発明は液体処理技術の一つとして用いられている限外
濾過法、逆浸透法などで使用される半透膜の補強用支持
体に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Background) The present invention relates to a support for reinforcing semipermeable membranes used in ultrafiltration, reverse osmosis, and the like, which are used as liquid treatment techniques.
さらに詳しくは、半透膜と支持体との間の付着性を増大
させることにより耐剥離性を改善した半透膜補強用支持
体に関する。More specifically, the present invention relates to a support for reinforcing a semipermeable membrane that has improved peeling resistance by increasing the adhesion between the semipermeable membrane and the support.
半透膜を利用した液体処理技術である限外濾過法、逆浸
透状装置の処理能力を左右する最大の要素は用いられる
半透膜、さらに詳しくは半透膜を成形加工したモジュー
ルであるのは言うまでもない。Ultrafiltration is a liquid processing technology that uses semipermeable membranes, and the biggest factor that affects the processing capacity of reverse osmosis-like devices is the semipermeable membrane used, and more specifically, the module in which the semipermeable membrane is molded. Needless to say.
コノ半透膜モジュールには各種の形式のものがあるが、
用途によって適・不適があり、使い分けされている。こ
の各種の形式のモジュールの中で、中空系型のモジュー
ル以外のもの、例えば平膜を適当な形、サイズに裁断し
たものを積層して用いるプレートアンドフレーム型、平
膜をプリーツ状に折りたたんで接着剤で接着加工したプ
リーツ型、平膜をのり巻き状に巻き込んで成形したスパ
イラルワウンド型、円筒状に成形したチューブ型のモジ
ュールに使用する半透膜はいずれも製膜の際、高分子物
質を溶剤および膨潤剤に溶解した半透膜形成液を織布、
不織布などの支持体」二に流延し、一定時間空気中で溶
剤を蒸発させた後凝固浴中に浸漬して支持体つき半透膜
として形成させるのが一般的である。There are various types of Kono semipermeable membrane modules.
There are suitable and unsuitable materials depending on the purpose, and they are used differently. Among these various types of modules, there are modules other than hollow type modules, such as the plate-and-frame type, in which flat membranes cut into appropriate shapes and sizes are laminated, and flat membranes are folded into pleats. Semipermeable membranes used in pleated type modules bonded with adhesive, spiral-wound type modules formed by rolling flat membranes, and tube-type modules formed into cylindrical shapes are all made using polymeric materials during membrane formation. A semi-permeable membrane forming solution prepared by dissolving in a solvent and a swelling agent is applied to a woven fabric,
Generally, the membrane is cast onto a support such as a nonwoven fabric, the solvent is evaporated in air for a certain period of time, and then immersed in a coagulation bath to form a semipermeable membrane with a support.
（従来技術およびその欠点）
支持体上に流延する理由はどんな材料の半透膜でも強度
が低く、取り扱いに注意を要するだけでなく、運転条件
にも制限が伴なうためである。(Prior Art and Its Disadvantages) The reason for casting on a support is that semipermeable membranes made of any material have low strength, require careful handling, and are also subject to restrictions on operating conditions.
一般的に用いられている半透膜用の補強材は前記のよう
に織布、不織布などであり、繊維材料としてはポリエス
テル、ポリアミド、ポリプロピレンなどがよく知られて
いる。As mentioned above, commonly used reinforcing materials for semipermeable membranes include woven fabrics and nonwoven fabrics, and well-known fiber materials include polyester, polyamide, and polypropylene.
このように、織布、不織布などの補強用支持体上に半透
膜形成液を流延すると膜形成液は織布や不織布の繊維の
隙間に入り込み、投錨効果により密着した支持体付き半
透膜が得られる。In this way, when a semipermeable membrane-forming liquid is cast onto a reinforcing support such as a woven fabric or non-woven fabric, the membrane-forming liquid enters the gaps between the fibers of the woven fabric or non-woven fabric, and the semi-permeable membrane forming liquid with the support adheres tightly due to the anchoring effect. A membrane is obtained.
でなく、織布の場合はヤーンの打込数、撚糸数などにも
依存する。また不織布の場合は繊維のからみ合いの密度
、即ち通気度（透気度）にも依存する。しかしながら、
半透膜の補強用支持体として用いる不織布は比較的通気
度が低く、２−見したところ繊維のからみ合いの密度が
高い。したがって半透膜形成液が繊維間隙へ浸透しにく
く、結果として半透膜と不織布との密着性があまり強く
ならない。In the case of woven fabrics, it also depends on the number of yarns and the number of twists. In the case of nonwoven fabrics, it also depends on the density of intertwining of fibers, that is, the air permeability. however,
The nonwoven fabric used as a reinforcing support for the semipermeable membrane has a relatively low air permeability and 2-an apparently high density of fiber entanglement. Therefore, it is difficult for the semipermeable membrane forming liquid to penetrate into the fiber gaps, and as a result, the adhesion between the semipermeable membrane and the nonwoven fabric is not very strong.
これを改善するために繊維の密度を低（して繊維間隙を
大きくすれば良いように考えられるが、半透膜の補強用
支持体として用いる不織布はある程度の剛性が必要であ
り、また運転時の圧力を支える必要があるためある程度
の厚さと密度を有するものでなければならない。It may be possible to improve this by lowering the density of the fibers and increasing the fiber gaps, but the nonwoven fabric used as the reinforcing support for the semipermeable membrane needs to have a certain degree of rigidity, and during operation It must have a certain degree of thickness and density because it needs to support the pressure of
（本発明の構成）
以上のような欠点を改良するために本発明者らは鋭意検
討した結果本発明に到達した。即ち本発明は半透膜補強
用の支持体であって、半透膜形成液が流延される側の面
に凹状くぼみ、またはもう一方の面まで貫通した小孔を
設けたことを特徴とする半透膜補強用支持体であり、半
透膜との密着性があまり強くない不織布の密着性が改善
された半透膜補強用支持体である。以下に本発明の詳細
な説明する。(Structure of the present invention) In order to improve the above-mentioned drawbacks, the present inventors have made extensive studies and have arrived at the present invention. That is, the present invention is a support for reinforcing a semipermeable membrane, which is characterized by having a concave depression on the side on which the semipermeable membrane forming liquid is cast, or a small hole penetrating to the other side. This is a support for reinforcing a semipermeable membrane that has improved adhesion to a nonwoven fabric that does not have very strong adhesion to a semipermeable membrane. The present invention will be explained in detail below.
第１図は本発明によって作られた半透膜補強用支持体で
、支持体の片面に凹状のくぼみ１−１′を付与したもの
の断面を示したものである。FIG. 1 shows a cross section of a support for reinforcing a semipermeable membrane made according to the present invention, in which a concave depression 1-1' is provided on one side of the support.
この凹状くぼみの形状・大きさなどは半透膜形成液と支
持体の材料との組み合わせによって選択されるが、通常
１００〜１５０μの厚さを有する支持体の１／３以上、
場合によっては裏面まで貫通していてもよい、表面孔径
は１００〜５００μ、形状は円錐状でも角錐状でもよい
。穿孔密度は多ければ多い程投錨効果が強く発揮される
が、１０〜２０斡佃程度あれば充分である。凹状くぼみ
または貫通孔を付与する方法は巻き取り時のガイドロー
ルの片側に表面突起を有するものを用いればよい。The shape and size of this concave depression are selected depending on the combination of the semipermeable membrane forming liquid and the material of the support.
In some cases, the pores may penetrate to the back surface, and the surface pore diameter may be 100 to 500 μm, and the shape may be conical or pyramidal. The higher the perforation density, the stronger the anchoring effect, but a density of about 10 to 20 squares is sufficient. A method for providing concave depressions or through holes may be to use a guide roll having surface protrusions on one side of the guide roll during winding.
第１図は本発明の半透膜支持体の断面を示す図で、１−
１′は凹状くぼみを示す。
特許出願人 ダイセル化学工業株式会社第 １ 図FIG. 1 is a cross-sectional view of the semipermeable membrane support of the present invention.
1' indicates a concave depression. Patent applicant: Daicel Chemical Industries, Ltd. Figure 1
Claims (1)
れる側の面に凹状くぼみ、またはもう一方の面まで貫通
した小孔を設けたことを特徴とする半透膜補強用支持体
。A support for reinforcing a semipermeable membrane, the semipermeable membrane having a concave depression on the side on which the semipermeable membrane forming liquid is cast, or a small hole penetrating to the other side. Reinforcement support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13532384A JPS6115705A (en) | 1984-07-02 | 1984-07-02 | Support for reinforcing semipermeable membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13532384A JPS6115705A (en) | 1984-07-02 | 1984-07-02 | Support for reinforcing semipermeable membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6115705A true JPS6115705A (en) | 1986-01-23 |
Family
ID=15149068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13532384A Pending JPS6115705A (en) | 1984-07-02 | 1984-07-02 | Support for reinforcing semipermeable membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6115705A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1462154A4 (en) * | 2001-12-10 | 2006-03-15 | Toray Industries | Separation membrane |
| WO2010047360A1 (en) * | 2008-10-23 | 2010-04-29 | 日東電工株式会社 | Sheet-like compound semipermeable membrane amd method for manufacturing same |
-
1984
- 1984-07-02 JP JP13532384A patent/JPS6115705A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1462154A4 (en) * | 2001-12-10 | 2006-03-15 | Toray Industries | Separation membrane |
| US7615105B2 (en) | 2001-12-10 | 2009-11-10 | Toray Industries, Inc. | Separation membrane |
| WO2010047360A1 (en) * | 2008-10-23 | 2010-04-29 | 日東電工株式会社 | Sheet-like compound semipermeable membrane amd method for manufacturing same |
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