JPH0666756A - Paste for moisture sensitive resistor of dew sensor and its manufacture - Google Patents
Paste for moisture sensitive resistor of dew sensor and its manufactureInfo
- Publication number
- JPH0666756A JPH0666756A JP22310092A JP22310092A JPH0666756A JP H0666756 A JPH0666756 A JP H0666756A JP 22310092 A JP22310092 A JP 22310092A JP 22310092 A JP22310092 A JP 22310092A JP H0666756 A JPH0666756 A JP H0666756A
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- weight
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- paste
- alcohol
- sensitive resistor
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、水分の付着により結露
状態を電気抵抗の変化として検出する結露センサの感湿
抵抗体に用いるペーストおよびその製造方法に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paste used for a humidity sensitive resistor of a dew condensation sensor that detects a dew condensation state as a change in electric resistance due to the adhesion of moisture, and a method for producing the paste.
【０００２】[0002]
【従来の技術】この出願の発明者らは、先に特願昭６０
−１５９３２３号「結露センサ」において、厚さ１０〜
１００μｍのフレキシブルプリント基板の表面に形成さ
れ、メッキが施された一対のくし形電極と、くし形電極
にまたがって皮膜形成された感湿抵抗体とを有する結露
センサを提案し、そのなかで感湿抵抗体用ペーストは、
炭素導電粒子７重量部、ポリビニルアルコール１９重量
部、消泡剤０．８重量部を水に溶解混合して１００重量
部としたものを開示した。2. Description of the Related Art
No. 159323 "condensation sensor", thickness 10
We have proposed a dew condensation sensor having a pair of plated comb-shaped electrodes formed on the surface of a 100 μm flexible printed circuit board and a moisture-sensitive resistor formed as a film across the comb-shaped electrodes. Wet resistor paste is
It was disclosed that 7 parts by weight of carbon conductive particles, 19 parts by weight of polyvinyl alcohol, and 0.8 parts by weight of an antifoaming agent were dissolved and mixed in water to obtain 100 parts by weight.
【０００３】[0003]
【発明が解決しようとする課題】一般にフレキシブルプ
リント基板は、１０μｍ〜２００μｍ厚のポリイミド樹
脂かポリエステル樹脂、あるいは、ガラス繊維にエポキ
シ樹脂を含浸したベース材のいずれかの表面上に、１
７．５μｍ〜７０μｍ厚の銅箔を、エポキシ樹脂かポリ
エステル樹脂、あるいは、四−六フッ化樹脂などで接着
するか、直接熱圧着する。銅箔は、エッチングにより不
要部分を取り除き、任意の回路に形成される。Generally, a flexible printed circuit board has a thickness of 10 .mu.m to 200 .mu.m, a polyimide resin or a polyester resin, or a glass fiber impregnated with an epoxy resin.
A copper foil having a thickness of 7.5 μm to 70 μm is bonded with an epoxy resin, a polyester resin, a tetra-hexafluororesin, or the like, or is directly thermocompression bonded. The copper foil is formed into an arbitrary circuit by removing unnecessary portions by etching.
【０００４】本発明者らが先に提案した結露センサは、
ニッケルメッキを施したくし形電極上とフレキシブルプ
リント基板上にまたがって感湿抵抗体用ペーストをスク
リーン印刷し、フレキシブルプリント基板上に感湿抵抗
体を形成するが、その際に、ペーストの乗りが悪く安定
した品質を得ることが難しかった。その理由は、上述し
た従来のペーストは、水のみが溶媒になっているので、
水分の蒸発によりペーストの粘度が大きくなり、印刷時
にスクリーンを通りにくくなるからである。The dew condensation sensor previously proposed by the present inventors is as follows.
A moisture-sensitive resistor paste is screen-printed over the nickel-plated comb-shaped electrode and the flexible printed circuit board to form a moisture sensitive resistor on the flexible printed circuit board, but at that time, the paste does not ride well. It was difficult to obtain stable quality. The reason is that the above-mentioned conventional paste has only water as the solvent,
This is because evaporation of water increases the viscosity of the paste and makes it difficult to pass through the screen during printing.
【０００５】[0005]
【発明の概要】本発明の目的は、上述のような問題点を
解決し安定した印刷特性を有する結露センサ感湿抵抗体
用ペーストおよびその製造方法を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a condensation sensor moisture sensitive resistor paste having a stable printing characteristic by solving the above-mentioned problems and a method for producing the same.
【０００６】本発明の感湿抵抗体用ペーストは、水２０
〜３０重量部と、ポリビニルアルコール９〜１１重量部
と、アセチレンブラック２〜３．５重量部と、粉末黒鉛
１．０〜２．８重量部と、チッ化ホウ素２．０〜３．０
重量部と、テトラヒドロフルフリルアルコール１５〜２
５重量部と、ｎ−オクチルアルコール１．０〜２．０重
量部とを含んでいる。The moisture-sensitive resistor paste of the present invention contains 20% water.
To 30 parts by weight, polyvinyl alcohol 9 to 11 parts by weight, acetylene black 2 to 3.5 parts by weight, powder graphite 1.0 to 2.8 parts by weight, and boron nitride 2.0 to 3.0.
Parts by weight and tetrahydrofurfuryl alcohol 15-2
It contains 5 parts by weight and 1.0 to 2.0 parts by weight of n-octyl alcohol.
【０００７】また、本発明の感湿抵抗体用ペーストの製
造方法は、加熱装置を有する容器に、水５０〜１５０重
量部を入れ攪拌しながらポリビニルアルコール９〜１１
重量部を徐々に加え、投入を完了した後、加熱，攪拌し
て溶解させた後、室温まで冷却させた溶解液を得る加熱
・溶解工程と、この加熱・溶解工程で得られた溶解液
に、アセチレンブラック２〜３．５重量部と、粉末黒鉛
１．０〜２．８重量部と、チッ化ホウ素２．０〜３．０
重量部とを投入し、混合し粉砕した混合液を得る混合・
粉砕工程と、この混合・粉砕工程で得られた混合液を、
加熱装置を有する混練機に移し、攪拌，加熱しながら、
水が２０〜３０重量部となるまで水を蒸発させた後、室
温まで冷却させた濃縮混合液を得る濃縮工程と、この濃
縮工程で得られた濃縮混合液に、テトラヒドロフルフリ
ルアルコール１５〜２５重量部を添加攪拌し、ついでｎ
−オクチルアルコール１．０〜２．０重量部を添加攪拌
し、粘度を低下させた相溶混合液体を得るアルコール添
加工程とを少なくとも含んでいる。Further, in the method for producing a moisture sensitive resistor paste of the present invention, 50 to 150 parts by weight of water is placed in a container having a heating device, and polyvinyl alcohol 9 to 11 is stirred.
Gradually add parts by weight, and after the addition is complete, heat and stir to dissolve and then dissolve to obtain a solution that has been cooled to room temperature. Acetylene black 2 to 3.5 parts by weight, powdered graphite 1.0 to 2.8 parts by weight, and boron nitride 2.0 to 3.0.
Add parts by weight and mix to obtain a mixed and pulverized mixture.
The crushing process and the mixed liquid obtained in this mixing / crushing process,
Transfer to a kneader with a heating device, while stirring and heating,
After evaporating water until the amount of water becomes 20 to 30 parts by weight, a concentration step of obtaining a concentrated mixed solution cooled to room temperature, and a concentrated mixed solution obtained in this concentrating step include tetrahydrofurfuryl alcohol 15 to 25 Add parts by weight and stir, then n
At least 1.0 to 2.0 parts by weight of octyl alcohol are added and stirred, and an alcohol addition step of obtaining a compatible mixed liquid with reduced viscosity is included.
【０００８】[0008]
【実施例】本発明の実施例を説明する。図１は、ペース
トの一例を製造する工程の流れを示す図である。以下
に、各工程に従って製造方法を説明する。EXAMPLES Examples of the present invention will be described. FIG. 1 is a diagram showing a flow of steps of manufacturing an example of a paste. The manufacturing method will be described below according to each step.
【０００９】（イ）加熱・溶解工程 加熱装置を有する容器に、イオン交換水８２重量部を入
れ、常温で攪拌しながらポリビニルアルコール（Ｐｏｌ
ｙ ｖｉｎｙｌ ａｌｃｏｈｏｌ：ＰＶＡ）（日本合成
化学株式会社製、商品名：ＧＬ−０５）１０重量部を徐
々に加え、投入を完了し８０℃まで昇温し１時間攪拌
し、溶解が確認され室温まで冷却された溶解液を作る。(B) Heating / dissolving step In a container having a heating device, 82 parts by weight of ion-exchanged water is put, and polyvinyl alcohol (Pol) is added while stirring at room temperature.
10 parts by weight of y vinyl alcohol (PVA) (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name: GL-05) was gradually added, and the addition was completed, the temperature was raised to 80 ° C., the mixture was stirred for 1 hour, and dissolution was confirmed until room temperature. Make a cooled lysate.
【００１０】この溶解液は、ポリビニルアルコールの希
釈液であり、このような希釈液を準備するのは、後述す
る粉体を溶かす際に、高濃度のポリビニルアルコールに
は溶けないからである。This solution is a diluent of polyvinyl alcohol, and such a diluent is prepared because it does not dissolve in high-concentration polyvinyl alcohol when the powder to be described later is dissolved.
【００１１】イオン交換水およびポリビニルアルコール
の割合は、上記値に限るものではなく、イオン交換水は
５０〜１５０重量部、ポリビニルアルコールは９〜１１
重量部の範囲であればよい。The proportions of ion-exchanged water and polyvinyl alcohol are not limited to the above values. Ion-exchanged water is 50 to 150 parts by weight and polyvinyl alcohol is 9 to 11 parts by weight.
It may be in the range of parts by weight.
【００１２】（ロ）混合・粉砕工程 ボールミルに、加熱・溶解工程で得られた溶解液と、ア
セチレンブラック（電気化学工業株式会社製、商品名：
デンカブラック、粒径５０〜９５０オングストローム、
平均粒径４２０オングストローム）３重量部と、粉末黒
鉛（日本黒鉛工業株式会社製、商品名：ＡＳＰ、粒径１
〜１０μｍ、平均粒径２μｍ）０．８重量部と、粉末黒
鉛（日本黒鉛工業株式会社製、商品名：ＣＳＰ−Ｅ、粒
径１〜１５μｍ、平均粒径４．５μｍ）０．８重量部
と、チッ化ホウ素２．３重量部とを入れ、７２ｒｐｍで
７２時間回転攪拌し、これら材料を混合し粉砕した混合
液を作る。(B) Mixing / Crushing Process In a ball mill, the solution obtained in the heating / dissolving process and acetylene black (manufactured by Denki Kagaku Kogyo Co., Ltd., trade name:
Denka Black, particle size 50-950 Å,
3 parts by weight of average particle diameter of 420 angstrom) and powder graphite (manufactured by Nippon Graphite Industry Co., Ltd., trade name: ASP, particle diameter 1
0.8 parts by weight of powder graphite (manufactured by Nippon Graphite Industry Co., Ltd., trade name: CSP-E, particle size 1 to 15 μm, average particle size 4.5 μm) and 0.8 parts by weight. And 2.3 parts by weight of boron nitride, and the mixture is rotatably stirred at 72 rpm for 72 hours to mix and pulverize these materials to prepare a mixed solution.
【００１３】なお、上記材料の割合は上記値に限るもの
ではなく、アセチレンブラックは２〜３．５重量部、粉
末黒鉛（ＡＳＰ）は０．５〜１．４重量部、粉末黒鉛
（ＣＳＰ−Ｅ）は０．５〜１．４重量部の範囲であれば
よい。The proportions of the above materials are not limited to the above values, but 2 to 3.5 parts by weight of acetylene black, 0.5 to 1.4 parts by weight of powder graphite (ASP), and powder graphite (CSP- E) may be in the range of 0.5 to 1.4 parts by weight.
【００１４】（ハ）濃縮工程 加熱装置を有するニーダ混練機に、混合・粉砕工程で得
られた混合液を移し、１０５〜１１０℃に加熱しながら
混練する。混練機に乾燥空気を導入し、混練機内の気相
を冷却管を通じて吸引し、この冷却管によって蒸発水分
を液化し分留して別容器に回収し、加熱を止めて攪拌し
ながら冷却された濃縮混合を作る。分留により、加熱・
溶解工程で投入したイオン交換水は５８重量部が蒸発
し、２４重量部になっている。なお、投入されたイオン
交換水が５０〜１５０重量部の場合、分留後のイオン交
換水が２０〜３０重量部となるように分留する。(C) Concentration step The mixed solution obtained in the mixing and crushing step is transferred to a kneader kneader having a heating device, and kneaded while heating at 105 to 110 ° C. Dry air was introduced into the kneader, the gas phase inside the kneader was sucked through a cooling pipe, and the evaporated water was liquefied and fractionated by this cooling pipe and collected in a separate container. Make a concentrated mix. Heating by fractional distillation
58 parts by weight of the ion-exchanged water charged in the dissolving step was evaporated to be 24 parts by weight. When the charged ion-exchanged water is 50 to 150 parts by weight, the ion-exchanged water after the fractional distillation is fractionated to be 20 to 30 parts by weight.
【００１５】（ニ）アルコール添加工程 ニーダ混練機における濃縮工程で得られた濃縮混合液
に、テトラヒドロフルフリルアルコール（Ｔｅｔｒａ
ｈｙｄｒｏ ｆｕｒｆｕｒｙｌ ａｌｃｏｈｏｌ：ＴＨ
ＦＦＡ）２．０重量部を添加攪拌し、ついでｎ−オクチ
ルアルコール（ｎ−Ｏｃｔｙｌ ａｌｃｏｈｏｌ）１．
６重量部を添加攪拌し、粘度を低下させた相溶混合液を
作る。(D) Alcohol addition step Tetrahydrofurfuryl alcohol (Tetra) is added to the concentrated mixed liquid obtained in the concentration step in the kneader kneader.
hydro furfuryl alcohol: TH
FFA) (2.0 parts by weight) is added and stirred, and then n-octyl alcohol (n-octyl alcohol) 1.
6 parts by weight are added and stirred to prepare a compatible mixed solution with reduced viscosity.
【００１６】テトラヒドロフルフリルアルコールは、１
５〜２５重量部、ｎ−オクチルアルコールは、１．０〜
２．０重量部の割合であってもよい。Tetrahydrofurfuryl alcohol is 1
5 to 25 parts by weight, n-octyl alcohol is 1.0 to
The ratio may be 2.0 parts by weight.
【００１７】これら沸点の高いアルコールを添加する理
由は、濃縮工程で減ったイオン交換水にこれらアルコー
ルを置換し、ペーストの乾燥を防ぐためである。The reason for adding these alcohols having a high boiling point is to prevent the paste from drying by substituting these alcohols with the ion-exchanged water reduced in the concentration step.
【００１８】（ホ）粘度調整工程 相溶混合溶液にイオン交換水を添加し、粘度を７．５〜
９［Ｐａ・ｓ］に調整し、最終的なペーストを得る。な
お、アルコール添加工程の段階で、所要の粘度が得られ
るならば、この工程は不要である。(E) Viscosity adjusting step Ion-exchanged water is added to the compatible mixed solution to adjust the viscosity to 7.5.
Adjust to 9 [Pa · s] to obtain the final paste. If the required viscosity can be obtained at the alcohol adding step, this step is unnecessary.
【００１９】以上の工程で作られた感湿抵抗体用ペース
トは、結露センサのくし形電極上にスクリーン印刷によ
り塗布され、ベークされて感湿抵抗体となる。The moisture-sensitive resistor paste produced in the above steps is applied onto the comb-shaped electrodes of the dew sensor by screen printing and baked to form a moisture-sensitive resistor.
【００２０】[0020]
【発明の効果】本発明の感湿抵抗体用ペーストを、スク
リーン印刷により結露センサのくし形電極上に塗布する
場合、従来のペーストと異なり、揮発量が少ないのでペ
ーストが乾燥せず、したがって粘度が高くならないので
安定した印刷特性が得られる。When the moisture-sensitive resistor paste of the present invention is applied to the comb-shaped electrode of the condensation sensor by screen printing, unlike the conventional paste, the paste does not dry because the amount of volatilization is small, and therefore the viscosity is low. Does not increase, so stable printing characteristics can be obtained.
【００２１】また、ペーストの粘度が安定しているの
で、多数箇所のスクリーン印刷が可能になり、作業効率
が上昇する。Further, since the viscosity of the paste is stable, it is possible to screen-print a large number of places, and work efficiency is increased.
【００２２】さらには、ペーストの粘度が安定している
ので、大面積のスクリーン印刷が可能になる。Furthermore, since the viscosity of the paste is stable, it is possible to screen-print a large area.
【図１】本発明の感湿抵抗体用ペーストの製造方法を示
す工程図である。FIG. 1 is a process chart showing a method for producing a moisture-sensitive resistor paste of the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 阿部 巌 大分県下毛郡三光村西秣323 中津コスモ ス電機株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Iwa Abe 323 Nishihata, Sanko-mura, Shimoge-gun, Oita Prefecture Nakatsu Cosmos Electric Co., Ltd.
Claims (2)
刷される感湿抵抗体用ペーストであって、 水２０〜３０重量部と、ポリビニルアルコール９〜１１
重量部と、アセチレンブラック２〜３．５重量部と、粉
末黒鉛１．０〜２．８重量部と、チッ化ホウ素２．０〜
３．０重量部と、テトラヒドロフルフリルアルコール１
５〜２５重量部と、ｎ−オクチルアルコール１．０〜
２．０重量部とを含む感湿抵抗体用ペースト。1. A moisture-sensitive resistor paste screen-printed on a comb-shaped electrode of a dew condensation sensor, comprising 20 to 30 parts by weight of water and 9 to 11 of polyvinyl alcohol.
Parts by weight, acetylene black 2 to 3.5 parts by weight, powder graphite 1.0 to 2.8 parts by weight, and boron nitride 2.0 to.
3.0 parts by weight and tetrahydrofurfuryl alcohol 1
5 to 25 parts by weight and n-octyl alcohol 1.0 to
A paste for moisture-sensitive resistors, which comprises 2.0 parts by weight.
刷される感湿抵抗体用ペーストの製造方法であって、 加熱装置を有する容器に、水５０〜１５０重量部を入れ
攪拌しながらポリビニルアルコール９〜１１重量部を徐
々に加え、投入を完了した後、加熱，攪拌して溶解させ
た後、室温まで冷却させた溶解液を得る加熱・溶解工程
と、 前記加熱・溶解工程で得られた溶解液に、アセチレンブ
ラック２〜３．５と、粉末黒鉛１．０〜２．８重量部
と、チッ化ホウ素２．０〜３．０重量部とを投入し、混
合し粉砕した混合液を得る混合・粉砕工程と、 前記混合・粉砕工程で得られた混合液を、加熱装置を有
する混練機に移し、攪拌，加熱しながら、水が２０〜３
０重量部となるまで水を蒸発させた後、室温まで冷却さ
せた濃縮混合液を得る濃縮工程と、 濃縮工程で得られた濃縮混合液に、テトラヒドロフルフ
リルアルコール１５〜２５重量部を添加攪拌し、ついで
ｎ−オクチルアルコール１．０〜２．０重量部を添加攪
拌し、粘度を低下させた相溶混合液体を得るアルコール
添加工程とを少なくとも含む感湿抵抗体用ペーストの製
造方法。2. A method for producing a paste for a moisture-sensitive resistor, which is screen-printed on a comb-shaped electrode of a dew condensation sensor, wherein 50 to 150 parts by weight of water is put in a container having a heating device and is stirred with polyvinyl alcohol. 9 to 11 parts by weight were gradually added, and after the addition was completed, the mixture was heated and stirred to be dissolved, and then a heating / dissolving step of obtaining a solution cooled to room temperature, and the heating / dissolving step were obtained. To the solution, acetylene black 2 to 3.5, powder graphite 1.0 to 2.8 parts by weight, and boron nitride 2.0 to 3.0 parts by weight were added, mixed and pulverized to obtain a mixed solution. The mixing / pulverizing step to be obtained and the mixed liquid obtained in the mixing / pulverizing step are transferred to a kneading machine having a heating device, and while stirring and heating, the water content is 20 to 3
After evaporating water to 0 parts by weight, a concentration step of obtaining a concentrated mixed solution cooled to room temperature and 15 to 25 parts by weight of tetrahydrofurfuryl alcohol are added to the concentrated mixed solution obtained in the concentration step and stirred. Then, 1.0-2.0 parts by weight of n-octyl alcohol is added and stirred, and an alcohol addition step of obtaining an incompatible mixed liquid with reduced viscosity is further included.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22310092A JPH0666756A (en) | 1992-08-24 | 1992-08-24 | Paste for moisture sensitive resistor of dew sensor and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22310092A JPH0666756A (en) | 1992-08-24 | 1992-08-24 | Paste for moisture sensitive resistor of dew sensor and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0666756A true JPH0666756A (en) | 1994-03-11 |
Family
ID=16792831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22310092A Pending JPH0666756A (en) | 1992-08-24 | 1992-08-24 | Paste for moisture sensitive resistor of dew sensor and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0666756A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001272366A (en) * | 2000-03-24 | 2001-10-05 | Tdk Corp | Electronic component having humidity detecting function and its manufacturing method |
| US7628970B2 (en) * | 2003-12-24 | 2009-12-08 | Nuclear Fuel Industries, Ltd. | Method of preparing feedstock liquid, method of preparing uranyl nitrate solution, and method of preparing polyvinyl alcohol solution |
| US7811526B2 (en) | 2003-10-16 | 2010-10-12 | Nuclear Fuel Industries, Ltd. | Device for recovering feedstock liquid, device for supplying a feedstock liquid, device for solidifying the surfaces of drops, and apparatus for producing ammonium diuranate particles |
-
1992
- 1992-08-24 JP JP22310092A patent/JPH0666756A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001272366A (en) * | 2000-03-24 | 2001-10-05 | Tdk Corp | Electronic component having humidity detecting function and its manufacturing method |
| US7811526B2 (en) | 2003-10-16 | 2010-10-12 | Nuclear Fuel Industries, Ltd. | Device for recovering feedstock liquid, device for supplying a feedstock liquid, device for solidifying the surfaces of drops, and apparatus for producing ammonium diuranate particles |
| US7628970B2 (en) * | 2003-12-24 | 2009-12-08 | Nuclear Fuel Industries, Ltd. | Method of preparing feedstock liquid, method of preparing uranyl nitrate solution, and method of preparing polyvinyl alcohol solution |
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