JPH11315994A - Fluid passage for covering liquid repelling thin film - Google Patents
Fluid passage for covering liquid repelling thin filmInfo
- Publication number
- JPH11315994A JPH11315994A JP13591798A JP13591798A JPH11315994A JP H11315994 A JPH11315994 A JP H11315994A JP 13591798 A JP13591798 A JP 13591798A JP 13591798 A JP13591798 A JP 13591798A JP H11315994 A JPH11315994 A JP H11315994A
- Authority
- JP
- Japan
- Prior art keywords
- passage
- liquid
- coating
- fluid
- thin film
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水、液体燃料、油
などの液体を流動（搬送）させる機器の通路の内面に撥
液性薄膜を被覆した流体通路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid passage in which a liquid repellent thin film is coated on an inner surface of a passage of a device for flowing (conveying) a liquid such as water, liquid fuel, or oil.
【０００２】[0002]
【従来の技術】図３は、合成樹脂製のパイプの内表面に
膜厚１５μｍ以上のテフロン樹脂ライニング（テフロン
はフッ素樹脂の一つで商標名）を施した流体通路が、磁
気結合ポンプ１の吸込通路２及び吐出通路３に適用され
た従来例を示す。ポンプ１の円筒状のハウジング７には
吸込通路２と吐出通路３が一体に成形され、ハウジング
７は隔壁体８によってポンプ室９とモータ室10とに区画
されている。モータ室10の中央には軸受14によって回転
軸15が回転可能に支持され、回転軸15のまわりの複数個
のステータコア11にはステータコイル12が巻回されてい
る。回転軸15の先端は隔壁体８を通過してポンプ室９内
に延び、回転軸15の先端にロータ17が固定され、ロータ
17の一側には回転羽根18が形成され、ロータ17の他側に
はロータマグネット19が配設されている。2. Description of the Related Art FIG. 3 shows that a fluid passage in which a Teflon resin lining (Teflon is a trade name of one of fluororesins) having a film thickness of 15 μm or more is provided on the inner surface of a pipe made of synthetic resin, The conventional example applied to the suction passage 2 and the discharge passage 3 is shown. The suction passage 2 and the discharge passage 3 are integrally formed in a cylindrical housing 7 of the pump 1, and the housing 7 is divided into a pump chamber 9 and a motor chamber 10 by a partition wall 8. A rotating shaft 15 is rotatably supported by a bearing 14 at the center of the motor chamber 10, and a stator coil 12 is wound around a plurality of stator cores 11 around the rotating shaft 15. The tip of the rotating shaft 15 extends through the partition 8 into the pump chamber 9, and the rotor 17 is fixed to the tip of the rotating shaft 15.
A rotating blade 18 is formed on one side of the rotor 17, and a rotor magnet 19 is provided on the other side of the rotor 17.
【０００３】図３のテフロン樹脂ライニングは、ライニ
ング（内張り）加工のため寸法精度が低く用途が限定さ
れ（精密機器用の流体通路には適さない）、また膜厚１
５μｍ以上であるので、通路の内径寸法が小さくなり、
流量が減少する。また、通路の寸法が比較的小さい場合
には、内面にテフロン樹脂ライニングを施すことに困難
が伴い、しかもライニング層の膜厚が一様にならず、通
路断面積の大きさの変化による圧力損失が発生する。テ
フロン樹脂ライニングは膜厚が大きいので、通路全体に
施すためには大量のテフロン樹脂を必要とする。The Teflon resin lining shown in FIG. 3 has a low dimensional accuracy due to the lining (lining) process, and its use is limited (not suitable for a fluid passage for precision equipment).
Since it is 5 μm or more, the inner diameter of the passage becomes smaller,
The flow rate decreases. In addition, when the dimensions of the passage are relatively small, it is difficult to apply a Teflon resin lining to the inner surface, and the thickness of the lining layer is not uniform, and the pressure loss due to the change in the cross-sectional area of the passage. Occurs. Since the Teflon resin lining has a large film thickness, a large amount of Teflon resin is required to cover the entire passage.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、流体を扱う
機器の流体通路において、通路内表面の撥液性（撥水性
又は撥油性）を向上させることにより、通路壁での摩擦
を低減させ、流体の圧力損失を少なくすることを課題と
する。SUMMARY OF THE INVENTION The present invention reduces the friction on the passage wall by improving the liquid repellency (water repellency or oil repellency) of the inner surface of the passage in the fluid passage of a device for handling a fluid. Another object of the present invention is to reduce the pressure loss of a fluid.
【０００５】[0005]
【課題を解決するための手段】本発明は、流体を扱う機
器の通路の内面に被膜を施した流体通路において、フル
オロアルキルシランを主成分とする低表面エネルギ物質
をコーティングして、液体通路内面の撥液性を高くした
撥液性薄膜を被覆した流体通路となしたことを第１の構
成とする。本発明は、第１の構成において、フルオロア
ルキルシラン、メチルテトラエトキシシラン、ｎ−ブタ
ノール、蒸留水、りん酸、エタノールからなる組成物を
コーティング液としてコーティングしたことを第２の構
成とする。SUMMARY OF THE INVENTION According to the present invention, there is provided a fluid passage having an inner surface coated with a low surface energy material containing fluoroalkylsilane as a main component. A first configuration is that a fluid passage covered with a liquid-repellent thin film having high liquid-repellency is formed. According to a second aspect of the present invention, in the first aspect, a composition comprising a fluoroalkylsilane, methyltetraethoxysilane, n-butanol, distilled water, phosphoric acid, and ethanol is coated as a coating liquid.
【０００６】[0006]
【発明の実施の形態】図１，図２は、本発明の撥液性薄
膜を被覆した流体通路の実施の形態を示す。図１(a) の
磁気結合ポンプ１において、図３(a) の従来例と同一の
部材には従来例と同一の符号を付し、その説明は省略す
る。固体の表面は、そこで原子の結合が切れているため
に電子状態の変化や原子配列の緩和が起きて、内部より
高いエネルギ状態となる。表面がもつこの過剰エネルギ
を表面エネルギといい、低エネルギ表面には撥液性が、
高エネルギ表面には親液性がそれぞれあり、接着力を知
る尺度として利用されている。1 and 2 show an embodiment of a fluid passage covered with a liquid-repellent thin film according to the present invention. In the magnetic coupling pump 1 of FIG. 1A, the same members as those of the conventional example of FIG. 3A are denoted by the same reference numerals as those of the conventional example, and the description thereof will be omitted. The surface of the solid has a higher energy state than the inside due to a change in the electronic state and relaxation of the atomic arrangement due to the breaking of atomic bonds there. This excess energy of the surface is called surface energy, and the low energy surface has liquid repellency,
Each of the high energy surfaces has lyophilic properties and is used as a measure for measuring the adhesive strength.
【０００７】本発明の実施の形態では、パイプ、吸込通
路２、吐出通路３等の流体通路の内表面に膜厚１μｍ以
下の低表面エネルギ物質の薄膜コーティング（塗装）が
施してある。そのため、流体通路の内表面が著しく低エ
ネルギ化され、撥液性が大幅に向上し、流体通路内を流
れる流体の圧力損失が少なくなる。低表面エネルギ物質
としてフッ素系樹脂、シリコーン系樹脂が知られている
が、本発明の実施の形態では、図２(a) の表に示す、フ
ルオロアルキルシランを主成分とする組成のコーティン
グ液を用いる。また、低表面エネルギ物質としてフルオ
ロアルキルシラン、フッ素含有物質としてのテフロン系
コーティング液、又は信越化学工業（株）製のＫＰ８０
１Ｍというコーティング液を使用することができる。In the embodiment of the present invention, a thin film coating (painting) of a low surface energy material having a thickness of 1 μm or less is applied to the inner surfaces of the fluid passages such as the pipe, the suction passage 2 and the discharge passage 3. Therefore, the inner surface of the fluid passage is significantly reduced in energy, the liquid repellency is greatly improved, and the pressure loss of the fluid flowing in the fluid passage is reduced. Fluorine-based resins and silicone-based resins are known as low surface energy substances. In the embodiment of the present invention, a coating liquid having a composition containing fluoroalkylsilane as a main component shown in the table of FIG. Used. Further, a fluoroalkylsilane as a low surface energy substance, a Teflon-based coating liquid as a fluorine-containing substance, or KP80 manufactured by Shin-Etsu Chemical Co., Ltd.
A coating solution of 1M can be used.
【０００８】流体を扱う機器（通路機器）の通路内面へ
の低表面エネルギ物質のコーティング工程は、図２(b)
に示すとおり、脱脂・洗浄、浸漬（注入）、引き上げ、
エアブロー（遠心分離）、乾燥、焼成である。低表面エ
ネルギ物質を図３(a) の吸込通路２及び吐出通路３の内
面にのみコーティングするに際しては、予めコーティン
グの必要のない部分にマスキングを施し、マスキングを
施した部分にはコーティング液が付着しないようにして
おく。図３(a) のように大型の通路機器については、マ
スキングは機器の内面にのみ施し、コーティング液を機
器の内部に注入し、浸漬は省略し、機器の表面に付着し
ないようにコーティング作業を行う。コーティングによ
り、ポンプの吸込通路２及び吐出通路３の内面に撥液性
を高くした撥液性薄膜が被覆されるので、流体通路を流
れる流体の圧力損失が減少し、ポンプの効率が向上す
る。FIG. 2 (b) shows a process of coating a low surface energy substance on an inner surface of a passage of a device (passage device) which handles a fluid.
As shown in, degreasing / washing, dipping (injection), lifting,
Air blow (centrifugal separation), drying and baking. When coating the low surface energy substance only on the inner surfaces of the suction passage 2 and the discharge passage 3 shown in FIG. 3A, masking is performed in advance on a portion that does not require coating, and a coating liquid adheres to the masked portion. Keep it away. As for the large passage equipment as shown in Fig. 3 (a), the masking is applied only to the inner surface of the equipment, the coating liquid is injected into the equipment, the immersion is omitted, and the coating work is performed so as not to adhere to the equipment surface. Do. The coating covers the inner surfaces of the suction passage 2 and the discharge passage 3 of the pump with the liquid-repellent thin film having high liquid repellency, so that the pressure loss of the fluid flowing through the fluid passage is reduced and the efficiency of the pump is improved.
【０００９】機器の通路が極めて小径の場合には、浸漬
（注入）工程に真空容器を使用し、通路機器を真空容器
に入れ、真空容器内を真空状態にしてからコーティング
液を充填し、真空容器を振動させたり回転させたりし
て、小径の通路にコーティング液を完全に付着させる。
このようにして、低表面エネルギ物質のコーティングを
複雑で極めて小径の通路にも施すことができ、しかもエ
アブロー（遠心分離）の工程により余分なコーティング
液は除去されるので、コーティング薄膜の厚みが一様と
なり、流体通路を流れる流体の圧力損失が減少する。When the passage of the equipment is extremely small in diameter, a vacuum vessel is used for the immersion (injection) step, the passage equipment is placed in a vacuum vessel, the inside of the vacuum vessel is evacuated, and then the coating liquid is filled. By vibrating or rotating the container, the coating liquid is completely attached to the small-diameter passage.
In this way, the coating of the low surface energy substance can be applied to a complicated and extremely small passage, and the excess coating liquid is removed by the air blow (centrifugal separation) process, so that the thickness of the coating thin film is reduced. The pressure loss of the fluid flowing through the fluid passage is reduced.
【００１０】[0010]
【実施例】コーティング工程の実施例について説明す
る。第１工程において、通路機器をイソプロピルアルコ
ール、エタノールなどの溶剤で脱脂し、次いで洗浄す
る。第２工程において、フルオロアルキルシラン（ＦＡ
Ｓ）を主成分とする図２(a) の表のコーティング液を浸
漬容器に入れ、通路機器をコーティング液に浸漬し、必
要に応じて通路内にコーティング液を注入して、通路機
器の通路内の全面にコーティング液を付着させる。EXAMPLE An example of the coating step will be described. In the first step, the passage device is degreased with a solvent such as isopropyl alcohol and ethanol, and then washed. In the second step, a fluoroalkylsilane (FA
2) The coating liquid having the composition shown in FIG. 2 (a) as a main component is placed in a dipping container, and the passage device is immersed in the coating liquid. The coating liquid is applied to the entire surface inside.
【００１１】第３工程において、通路機器を浸漬容器か
ら引き上げる。第４工程において、エアブロー装置又は
遠心分離機を用いて、通路内その他の部分に残留し余分
に付着したコーティング液を除去する。エアブローのと
きは３kg/cm2の圧縮空気を約１０秒間だけ吹きつけ、遠
心分離のときは２０００rpm の回転速度で約２０分間だ
け回転させる。In the third step, the passage device is lifted from the immersion container. In the fourth step, an excess amount of the coating liquid remaining in and adhering to other portions in the passage is removed using an air blow device or a centrifuge. At the time of air blow, compressed air of 3 kg / cm 2 is blown for only about 10 seconds, and at the time of centrifugal separation, it is rotated at a rotation speed of 2000 rpm for about 20 minutes.
【００１２】第５工程において、コーティング液中の溶
媒を揮発させるために、１００°Ｃの乾燥室に約１０分
間だけ入れ、乾燥させる。第６工程において、通路機器
を電気炉などに入れて、耐熱温度以下で焼成する。通路
機器の大きさ，材質により異なるが、一般的には温度を
２５０°Ｃにして２０分間だけ焼成する。以上の工程に
より通路機器の通路内面にフルオロアルキルシランコー
ト薄膜が得られる。In the fifth step, in order to volatilize the solvent in the coating liquid, it is placed in a drying chamber at 100 ° C. for only about 10 minutes and dried. In the sixth step, the passage device is placed in an electric furnace or the like and fired at a temperature not higher than the heat-resistant temperature. Although it depends on the size and material of the passage device, it is generally baked for 20 minutes at a temperature of 250 ° C. Through the above steps, a fluoroalkylsilane-coated thin film is obtained on the inner surface of the passage of the passage device.
【００１３】[0013]
【発明の効果】本発明の撥液性薄膜を被覆した流体通路
は、流体を扱う機器の通路の内面に被膜を施した流体通
路において、フルオロアルキルシランを主成分とする低
表面エネルギ物質をコーティングして、液体通路内面の
撥液性（撥水性又は撥油性）を高くした撥液性薄膜を被
覆してある。従って、通路壁での摩擦が低減し、流体通
路を流れる流体の圧力損失が少なくなり、流体を扱う機
器の効率が向上する。また、本発明は複雑で小径の流体
通路にも適用でき、精密機器の流体通路に低表面エネル
ギ物質をコーティングして効率を高めることができる。The fluid passage coated with the liquid-repellent thin film of the present invention is a fluid passage in which a coating is applied to the inner surface of the passage of a device for handling a fluid, wherein the fluid passage is coated with a low surface energy substance mainly composed of fluoroalkylsilane. Then, the inner surface of the liquid passage is coated with a liquid-repellent thin film having a higher liquid-repellent property (water repellency or oil repellency). Therefore, the friction at the passage wall is reduced, the pressure loss of the fluid flowing through the fluid passage is reduced, and the efficiency of the device handling the fluid is improved. Further, the present invention can be applied to a complicated and small-diameter fluid passage, and the fluid passage of a precision instrument can be coated with a low surface energy substance to increase the efficiency.
【図１】図１(a) は本発明を磁気結合ポンプの吸込通路
及び吐出通路に適用した実施の形態の断面図であり、図
１(b) はパイプに適用した状態を示す断面図である。FIG. 1 (a) is a sectional view of an embodiment in which the present invention is applied to a suction passage and a discharge passage of a magnetic coupling pump, and FIG. 1 (b) is a sectional view showing a state in which the present invention is applied to a pipe. is there.
【図２】図２(a) は本発明の実施の形態に用いるコーテ
ィング液の組成を示す表であり、図２(b) は本発明の実
施の形態のコーティングの工程を示す説明図である。FIG. 2 (a) is a table showing the composition of a coating liquid used in an embodiment of the present invention, and FIG. 2 (b) is an explanatory diagram showing a coating process in the embodiment of the present invention. .
【図３】図３(a) は磁気結合ポンプの吸込通路及び吐出
通路に従来のライニングを施した断面図であり、図３
(b) はパイプに従来のライニングを適用した状態を示す
断面図である。FIG. 3 (a) is a cross-sectional view in which a conventional lining is applied to a suction passage and a discharge passage of a magnetic coupling pump.
(b) is a sectional view showing a state where a conventional lining is applied to a pipe.
１ 磁気結合ポンプ ２ 吸込通路 ３ 吐出通路 21 低表面エネルギ物質薄膜 DESCRIPTION OF SYMBOLS 1 Magnetic coupling pump 2 Suction passage 3 Discharge passage 21 Low surface energy material thin film
Claims (2)
した流体通路において、フルオロアルキルシランを主成
分とする低表面エネルギ物質をコーティングして、液体
通路内面の撥液性を高くした撥液性薄膜を被覆した流体
通路。In a fluid passage having a coating formed on the inner surface of a passage of a device for handling a fluid, a low surface energy substance containing fluoroalkylsilane as a main component is coated to increase the liquid repellency of the inner surface of the liquid passage. A fluid passage covered with a liquid thin film.
エトキシシラン、ｎ−ブタノール、蒸留水、りん酸、エ
タノールからなる組成物をコーティング液としてコーテ
ィングした請求項１記載の撥液性薄膜を被覆した流体通
路。2. The fluid passage coated with a liquid-repellent thin film according to claim 1, wherein a composition comprising a fluoroalkylsilane, methyltetraethoxysilane, n-butanol, distilled water, phosphoric acid, and ethanol is coated as a coating solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13591798A JPH11315994A (en) | 1998-05-01 | 1998-05-01 | Fluid passage for covering liquid repelling thin film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13591798A JPH11315994A (en) | 1998-05-01 | 1998-05-01 | Fluid passage for covering liquid repelling thin film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11315994A true JPH11315994A (en) | 1999-11-16 |
Family
ID=15162874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13591798A Pending JPH11315994A (en) | 1998-05-01 | 1998-05-01 | Fluid passage for covering liquid repelling thin film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11315994A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7455045B2 (en) | 2006-08-01 | 2008-11-25 | Aisan Kogyo Kabushiki Kaisha | Fluid flow control device for internal combustion engine |
| JP2008286029A (en) * | 2007-05-15 | 2008-11-27 | Toyota Motor Corp | Cooling device of internal combustion engine |
| US11630402B2 (en) | 2020-09-18 | 2023-04-18 | Fujifilm Business Innovation Corp. | Particle conveying device and image forming apparatus |
-
1998
- 1998-05-01 JP JP13591798A patent/JPH11315994A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7455045B2 (en) | 2006-08-01 | 2008-11-25 | Aisan Kogyo Kabushiki Kaisha | Fluid flow control device for internal combustion engine |
| JP2008286029A (en) * | 2007-05-15 | 2008-11-27 | Toyota Motor Corp | Cooling device of internal combustion engine |
| US11630402B2 (en) | 2020-09-18 | 2023-04-18 | Fujifilm Business Innovation Corp. | Particle conveying device and image forming apparatus |
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