JPH08269371A - Resistance coating material - Google Patents
Resistance coating materialInfo
- Publication number
- JPH08269371A JPH08269371A JP7077496A JP7749695A JPH08269371A JP H08269371 A JPH08269371 A JP H08269371A JP 7077496 A JP7077496 A JP 7077496A JP 7749695 A JP7749695 A JP 7749695A JP H08269371 A JPH08269371 A JP H08269371A
- Authority
- JP
- Japan
- Prior art keywords
- linearity
- resistance
- organic polymer
- fine powder
- coating material
- 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
Landscapes
- Paints Or Removers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はポテンショメータ式の位
置（角度）検出センサなどに用いられる抵抗塗料に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resistance paint used for a potentiometer type position (angle) detecting sensor or the like.
【０００２】[0002]
【従来の技術】従来、可変抵抗器用抵抗体を応用したポ
テンショメータ式の位置（角度）検出センサに使用され
る抵抗塗料は、カーボンブラック、グラファイトまたは
その混合物のパウダー（以下カーボンパウダーと称す）
を、適当な溶剤に溶解した合成樹脂に分散させたもので
ある。この塗料は、スクリーン印刷法により主としてフ
ェノール積層板、セラミック基板、樹脂成形体のような
基体上に塗布、乾燥され抵抗皮膜を形成する。この方法
については一般的に広く知られている。2. Description of the Related Art Conventionally, resistance paints used in potentiometer-type position (angle) detection sensors to which resistors for variable resistors are applied are powders of carbon black, graphite or a mixture thereof (hereinafter referred to as carbon powder).
Is dispersed in a synthetic resin dissolved in a suitable solvent. This paint is applied to a substrate such as a phenol laminated plate, a ceramic substrate or a resin molded body by a screen printing method and dried to form a resistance film. This method is generally widely known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来のポテンショメータ式の位置（角度）検出センサで
は、抵抗皮膜上を金属製刷子が摺動するため摺動回数と
ともに皮膜が削れる。この削れ量が不均一になるため直
線性が劣化するという課題を有していた。However, in the above-mentioned conventional potentiometer type position (angle) detection sensor, since the metal brush slides on the resistance film, the film is scraped with the number of times of sliding. There is a problem in that the linearity is deteriorated because the amount of scraping becomes uneven.
【０００４】一般に抵抗皮膜摩耗対策としてシリカ、ア
ルミナ、ダイヤモンドパウダーなどの無機粉体を構造材
として添加する方法が知られているが、金属製刷子の硬
度よりもこれらの無機粉体の硬度が大きいために抵抗表
面層の無機粉体が刷子を逆に磨耗し、刷子の削れ粉が酸
化されて絶縁物となり、抵抗皮膜上に堆積して出力ノイ
ズを発生させるという課題があった。また、粒子径の大
きいまたは分散性の悪い構造材を添加した場合には、抵
抗皮膜の表面粗度が悪くなり初期の直線性が悪くなると
いう課題を有していた。Generally, a method of adding an inorganic powder such as silica, alumina, or diamond powder as a structural material is known as a countermeasure against wear of the resistance film, but the hardness of these inorganic powders is larger than that of a metal brush. Therefore, there is a problem that the inorganic powder of the resistance surface layer wears the brush reversely, the scraped powder of the brush is oxidized and becomes an insulator, and is deposited on the resistance film to generate output noise. Further, when a structural material having a large particle size or poor dispersibility is added, there is a problem that the surface roughness of the resistance film is deteriorated and the initial linearity is deteriorated.
【０００５】本発明は上記従来の課題を解決するもの
で、初期の直線性を悪化させることなく摺動後において
直線性劣化および出力ノイズ発生が起こらない優れたポ
テンショメータ式の位置（角度）検出センサなどに用い
られる抵抗塗料を提供することを目的とするものであ
る。The present invention solves the above conventional problems, and is an excellent potentiometer-type position (angle) detection sensor in which linearity deterioration and output noise do not occur after sliding without deteriorating the initial linearity. The purpose of the present invention is to provide a resistance paint used for such purposes.
【０００６】[0006]
【課題を解決するための手段】上記従来の課題を解決す
るために本発明の抵抗塗料は、カーボンパウダーと合成
樹脂に有機ポリマー微粉体を１ないし５０ｗｔ％添加す
る構成を有している。In order to solve the above conventional problems, the resistance paint of the present invention has a structure in which 1 to 50 wt% of organic polymer fine powder is added to carbon powder and synthetic resin.
【０００７】さらに、抵抗塗料に含まれる有機ポリマー
微粉体は、形状が球状で平均粒子径が２ないし７μｍ、
かつ成分がベンゾグアナミンもしくは、メラミン樹脂を
骨格とするものが最も好ましい。Further, the organic polymer fine powder contained in the resistance coating has a spherical shape and an average particle diameter of 2 to 7 μm.
In addition, it is most preferable that the component has benzoguanamine or a melamine resin as a skeleton.
【０００８】[0008]
【作用】この構成によって、合成樹脂に導電粉としてカ
ーボンブラックと摺動性を付与するためのグラファイト
を用い、さらに有機ポリマー微粉体を良好な構造材とし
て１ないし５０ｗｔ％添加することで金属製刷子とマッ
チングした適度な抵抗皮膜硬度が得られ、抵抗皮膜と金
属製刷子の削れが少なくなるため摺動後の直線性劣化が
極めて少なく、かつあ出力ノイズを低いレベルに保つこ
とが可能となる。１ｗｔ％未満の添加および平均粒子径
２μｍ未満の添加では構造材効果が少なく、また５０ｗ
ｔ％より多く添加した場合は合成樹脂のバインダーとし
ての機能が不足して抵抗皮膜が脆くなり、構造材効果が
ないため摺動後において直線性劣化が生じる。形状が球
状でない場合および平均粒子径が７μｍより大きいもの
を添加した場合は抵抗表面層に突出し、表面粗度を大き
くするため初期の直線性が悪くなる。他の有機ポリマー
微粉体でも同様の効果が得られるが、成分がベンゾグア
ナミンもしくはメラミン樹脂を骨格とするものが熱硬化
性ポリマーで耐熱性があり、比較的高硬度なため最も良
好な構造材として機能する。With this construction, a metal brush is prepared by using carbon black as conductive powder and graphite for imparting slidability to synthetic resin, and further adding 1 to 50 wt% of organic polymer fine powder as a good structural material. A moderate resistance film hardness matching with is obtained, and the resistance film and the metal brush are less scraped, so that the linearity deterioration after sliding is extremely small, and the output noise can be maintained at a low level. Addition of less than 1 wt% and addition of less than 2 μm average particle size have little effect on the structural material,
If it is added in excess of t%, the function of the synthetic resin as a binder becomes insufficient, the resistance film becomes brittle, and there is no effect of the structural material, resulting in linear deterioration after sliding. When the shape is not spherical or when the average particle size is larger than 7 μm, it protrudes into the resistance surface layer and increases the surface roughness, so that the initial linearity is deteriorated. Similar effects can be obtained with other fine powders of organic polymers, but those that have benzoguanamine or melamine resin as the skeleton are thermosetting polymers that have heat resistance and have relatively high hardness, and thus function as the best structural materials To do.
【０００９】また、有機ポリマー微粉体は抵抗塗料中の
分散性も良いため抵抗皮膜の表面粗度に影響が少なく初
期の直線性も良好である。Further, since the organic polymer fine powder has a good dispersibility in the resistance coating, it has little influence on the surface roughness of the resistance coating and has a good initial linearity.
【００１０】[0010]
【実施例】以下本発明の実施例および比較例を（表１）
を参照しながら説明する。EXAMPLES Examples and comparative examples of the present invention are shown below (Table 1).
Will be described with reference to.
【００１１】[0011]
【表１】 [Table 1]
【００１２】〈実施例（試料Ｎｏ．１〜８）〉変性フェ
ノール樹脂６０ｗｔ％に対しカーボンブラック（アセチ
レンブラック）２０ｗｔ％、グラファイト５ｗｔ％、お
よび添加剤としてベンゾグアナミン・メラミン樹脂球状
粉体（日本触媒製エポスター）０．５〜６０ｗｔ％を溶
剤（イソホロン）と混合し、３本ロールミルにて分散し
て抵抗塗料とした。<Examples (Sample Nos. 1 to 8)> 20 wt% of carbon black (acetylene black), 5 wt% of graphite and 60 wt% of modified phenol resin, and benzoguanamine / melamine resin spherical powder as an additive (manufactured by Nippon Shokubai) (Eposter) 0.5-60 wt% was mixed with a solvent (isophorone) and dispersed by a three-roll mill to give a resistance coating.
【００１３】この抵抗塗料を先に電極を銀塗料にて印刷
・焼付した紙フェノール積層板上にスクリーン印刷し、
これを２００℃にて１０分加熱硬化させて抵抗体を形成
した。このものに金属製刷子、ケースなどを取り付け、
ポテンショメータ式の位置（角度）検出センサとした。This resistance paint was screen-printed on a paper-phenolic laminated plate on which electrodes were printed / baked with silver paint first,
This was heat-cured at 200 ° C. for 10 minutes to form a resistor. Attach a metal brush, case, etc. to this thing,
A potentiometer-type position (angle) detection sensor was used.
【００１４】摺動特性については、５００００回後の直
線性劣化と出力ノイズにて評価した。The sliding characteristics were evaluated by the linearity deterioration after 50,000 times and the output noise.
【００１５】その結果、５００００回摺動後の直線性変
化は０〜０．２％と極めて小さく、出力ノイズについて
も比較例４（構造材無添加）と同等の結果が得られた。
なお、ベンゾグアナミン・メラミン樹脂球状粉体の粒子
径としては、１μｍ未満では構造材効果が小さく、７μ
ｍより大きいものでは抵抗皮膜の表面粗度が悪くなり、
初期の直線性が悪くなることが確認された。As a result, the change in linearity after sliding 50,000 times was as small as 0 to 0.2%, and the output noise was similar to that of Comparative Example 4 (no addition of the structural material).
When the particle diameter of the benzoguanamine / melamine resin spherical powder is less than 1 μm, the structure material effect is small, and
If it is larger than m, the surface roughness of the resistance film becomes poor,
It was confirmed that the initial linearity deteriorates.
【００１６】〈比較例１（試料Ｎｏ．９）〉実施例と同
様の方法で抵抗塗料に添加剤としてベンゾグアナミン・
メラミン樹脂リン片状粉体を５ｗｔ％添加した。その結
果５００００回摺動後の直線性劣化は抑制できるが出力
ノイズが大きくなる。<Comparative Example 1 (Sample No. 9)> Benzoguanamine.
5 wt% of melamine resin scaly powder was added. As a result, linearity deterioration after sliding 50,000 times can be suppressed, but output noise increases.
【００１７】〈比較例２（試料Ｎｏ．１０）〉実施例と
同様の方法で抵抗塗料に添加剤としてアクリル樹脂球状
粉体を５ｗｔ％添加した。その結果出力ノイズは発生し
ないが、構造材効果が小さく摺動後の直線性劣化は抑え
られない。<Comparative Example 2 (Sample No. 10)> 5 wt% of acrylic resin spherical powder was added as an additive to the resistance paint in the same manner as in Example. As a result, output noise does not occur, but the effect of the structural material is small and the linearity deterioration after sliding cannot be suppressed.
【００１８】〈比較例３（試料Ｎｏ．１１）〉実施例と
同様の方法で抵抗塗料に添加剤としてアルミナ球状粉体
を５ｗｔ％添加した。その結果５００００回摺動後の直
線性劣化は抑制できるが出力ノイズが非常に大きくな
る。<Comparative Example 3 (Sample No. 11)> 5% by weight of spherical alumina powder was added as an additive to the resistance coating material in the same manner as in the example. As a result, the linearity deterioration after sliding 50,000 times can be suppressed, but the output noise becomes very large.
【００１９】〈比較例２（試料Ｎｏ．１２〜１３）〉比
較例１と同様の方法で抵抗塗料に添加剤として、シリカ
球状粉体を５ｗｔ％添加した。その結果粒子径１μｍで
は５００００回摺動後の直線性劣化は抑制できるが出力
ノイズが非常に大きくなる。また、粒子径０．０２μｍ
では出力ノイズは発生しないが、構造材効果が小さく摺
動後の直線性劣化は抑えられない。<Comparative Example 2 (Sample Nos. 12 to 13)> In the same manner as in Comparative Example 1, 5 wt% of silica spherical powder was added to the resistance coating as an additive. As a result, when the particle diameter is 1 μm, linearity deterioration after sliding 50,000 times can be suppressed, but output noise becomes extremely large. Also, the particle size is 0.02 μm
Does not generate output noise, but the structural material effect is small and linear deterioration after sliding cannot be suppressed.
【００２０】〈比較例３（試料Ｎｏ．１４）〉比較例１
と同様の方法で抵抗塗料に添加剤として、ＢＮリン片状
粉体を５ｗｔ％添加した。その結果抵抗皮膜の表面粗度
が悪くなり、直線性も悪くなることが確認された。<Comparative Example 3 (Sample No. 14)> Comparative Example 1
In the same manner as in (5), 5 wt% of BN flaky powder was added to the resistance coating as an additive. As a result, it was confirmed that the surface roughness of the resistance film deteriorates and the linearity also deteriorates.
【００２１】〈比較例４（試料Ｎｏ．１５）〉比較例１
と同様の方法で抵抗塗料を構造材無添加にて評価した。
その結果５００００回摺動後の直線性劣化は０．２ない
し０．５％と大きくなった。<Comparative Example 4 (Sample No. 15)> Comparative Example 1
The resistance paint was evaluated in the same manner as in 1.
As a result, the linearity deterioration after sliding 50,000 times was as large as 0.2 to 0.5%.
【００２２】[0022]
【発明の効果】以上の説明により明らかなように本発明
の抵抗塗料によれば、本構成の抵抗塗料を用いることに
よって、有機ポリマー微粉体が構造材として機能し、金
属製刷子とマッチングした適度な抵抗皮膜硬度が得ら
れ、摺動後において直線性劣化およびノイズ発生が起こ
らないという利点を有する。As is apparent from the above description, according to the resistance coating material of the present invention, by using the resistance coating material of this constitution, the fine organic polymer powder functions as a structural material, and is suitable to match with the metal brush. It has the advantages that a high resistance film hardness can be obtained, and linearity deterioration and noise generation do not occur after sliding.
【００２３】そして、さらに有機ポリマー微粉体は、抵
抗塗料中の分散性も良いため比較的多量充填しても表面
粗度に影響がなく初期の直線性も良好であるという効果
を有する。Further, since the organic polymer fine powder has good dispersibility in the resistance coating, it has an effect that the surface roughness is not affected even when a relatively large amount is filled and the initial linearity is good.
Claims (3)
イトと合成樹脂と有機ポリマー微粉体からなり、この有
機ポリマー微粉体の含有量を１ないし５０重量％（以下
ｗｔ％と称す）とした抵抗塗料。1. A resistance paint comprising at least carbon black, graphite, a synthetic resin, and an organic polymer fine powder, and the content of the organic polymer fine powder is 1 to 50% by weight (hereinafter referred to as wt%).
粒子径が２ないし７μｍとする請求項１記載の抵抗塗
料。2. The resistance paint according to claim 1, wherein the organic polymer fine powder has a spherical shape and an average particle diameter of 2 to 7 μm.
ナミンもしくはメラミン樹脂を骨格とする請求項１記載
の抵抗塗料。3. The resistance paint according to claim 1, wherein the component of the organic polymer fine powder has a benzoguanamine or melamine resin as a skeleton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7077496A JPH08269371A (en) | 1995-04-03 | 1995-04-03 | Resistance coating material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7077496A JPH08269371A (en) | 1995-04-03 | 1995-04-03 | Resistance coating material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08269371A true JPH08269371A (en) | 1996-10-15 |
Family
ID=13635590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7077496A Pending JPH08269371A (en) | 1995-04-03 | 1995-04-03 | Resistance coating material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08269371A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013049832A (en) * | 2011-07-29 | 2013-03-14 | Fujifilm Corp | Carbon black composition, carbon black-containing coating film, and magnetic recording medium having the same |
| WO2020144980A1 (en) * | 2019-01-11 | 2020-07-16 | Ｎｏｋクリューバー株式会社 | Slide member composition and slide member |
-
1995
- 1995-04-03 JP JP7077496A patent/JPH08269371A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013049832A (en) * | 2011-07-29 | 2013-03-14 | Fujifilm Corp | Carbon black composition, carbon black-containing coating film, and magnetic recording medium having the same |
| WO2020144980A1 (en) * | 2019-01-11 | 2020-07-16 | Ｎｏｋクリューバー株式会社 | Slide member composition and slide member |
| JPWO2020144980A1 (en) * | 2019-01-11 | 2021-11-11 | Ｎｏｋクリューバー株式会社 | Composition for sliding member and sliding member |
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