JPH055265B2 - - Google Patents
Info
- Publication number
- JPH055265B2 JPH055265B2 JP60249773A JP24977385A JPH055265B2 JP H055265 B2 JPH055265 B2 JP H055265B2 JP 60249773 A JP60249773 A JP 60249773A JP 24977385 A JP24977385 A JP 24977385A JP H055265 B2 JPH055265 B2 JP H055265B2
- Authority
- JP
- Japan
- Prior art keywords
- friction
- melamine resin
- fibers
- dust
- friction 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.)
- Expired - Lifetime
Links
Landscapes
- Braking Arrangements (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
〔産業上の利用分野〕
本発明は摩擦特性の安定性に優れた摩擦材、具
体的には摩擦材の添加物として使用される摩擦調
整剤の改良に関するものである。
〔従来の技術および発明が解決すべき問題点〕
従来より自動車用摩擦材として一般に有機結合
剤、石綿等の補強繊維、摩擦調整剤等の混合物か
らなる有機系摩擦材が用いられている。
又、最近では、環境的理由から、石綿に代わる
補強繊維として、スチールウール等の合属繊維、
ガラス繊維等のセラミツク繊維、鉱物繊維を使用
した摩擦材が商品化されつつある。
その摩擦調整剤の１つとして従来カシユーを主
成分としたダストが使用されているが、これは低
温時における摩耗の防止および炭化膜生成による
相手材功撃性の防止等に効果があるとされてい
る。
しかしその一方で繰返しの摩擦に対しては、摩
擦係数が低下するという現象が往々にしてみられ
る。
本発明はこのような現象を解消するためになさ
れたものである。
〔問題点を解決するための手段および作用〕
本発明は摩擦材添加物としてメラミン樹脂を主
成分とした熱硬化性ダストを使用することにより
摩擦係数の安定性の維持に対し十分な効果が認め
られ、又更にメラミン樹脂に各種ゴムまたは熱可
塑性樹脂等のエラストマーによる改質を加えるこ
とにより物性調整剤としての機能もみられること
に基いてなされたものである。即ち本発明の要旨
はメラミン樹脂またはメラミン樹脂を５〜30％の
範囲で熱可塑性樹脂あるいはゴム、ないしはエラ
ストマーで変性してなる変性メラミン樹脂を主成
分とした熱硬化性ダストを摩擦調整剤として含有
することを特徴とする有機系摩擦材に存するもの
である。
又特開昭57−63376号公報によりポリイミド硬
化物ダストを配合して耐摩耗性を良好ならしめた
摩擦材料が知られているが、本発明はこのポリイ
ミド硬化物とは異つたメラミン樹脂あるいは変性
メラミン樹脂を主体とした熱硬化性ダストであ
り、その効果も耐摩耗性の向上を目的としたもの
とは異り摩擦係数の安定性維持にある。
〔作用〕
本発明に従つてメラミン樹脂を主成分とした熱
硬化性ダストを摩擦調整剤とした有機系摩擦材は
繰返し摩擦に対しても摩擦係数が低下せず、摩擦
安定性の維持に効果をもたらすが、その反面成形
物の物性例えば硬度が従来の摩擦材と比較して硬
くなるという問題がある。
そこでこのメラミン樹脂に対し各種熱可塑性樹
脂例えばポリビニルブチラールあるいは各種ゴ
ム、エラストマー例えばNBR（ニトリル・ブタジ
エンゴム）等をブレンドしたりして変性処理を施
すことによりメラミン樹脂の硬度等の物性を調整
しようとするものである。
上記のメラミン樹脂の変性に用いられる熱可塑
性樹脂、ゴム、エラストマーの量は一義的には決
められないが、５〜30％の範囲が好ましい。
上記熱硬化性ダストは、メラミン樹脂を加熱し
て十分硬化させたものを粒状に粉砕することによ
り得ることができる。
本発明における有機系摩擦材とはアスベストを
補強材としたもののみならず、ガラスフアイバ
ー、スチールウールおよびその他のセラミツク繊
維、鉱物繊維および金属繊維を補強材に使用した
もの等を包括的に意味する。
〔実施例および発明の効果〕
下記表１の基本配合で有機系摩擦材を成形し
た。
[Industrial Field of Application] The present invention relates to a friction material with excellent stability in frictional properties, and specifically to the improvement of a friction modifier used as an additive for a friction material. [Prior Art and Problems to be Solved by the Invention] Conventionally, organic friction materials consisting of a mixture of an organic binder, reinforcing fibers such as asbestos, a friction modifier, etc. have been used as friction materials for automobiles. Recently, for environmental reasons, composite fibers such as steel wool, etc. have been used as reinforcing fibers to replace asbestos.
Friction materials using ceramic fibers such as glass fibers and mineral fibers are being commercialized. As one of the friction modifiers, dust containing cashew as its main ingredient has traditionally been used, and this is said to be effective in preventing wear at low temperatures and preventing the formation of a carbonized film that reduces the effectiveness of impact on the mating material. ing. However, on the other hand, the phenomenon that the coefficient of friction often decreases due to repeated friction is often observed. The present invention has been made in order to eliminate such a phenomenon. [Means and effects for solving the problems] The present invention has been found to be sufficiently effective in maintaining the stability of the friction coefficient by using thermosetting dust mainly composed of melamine resin as a friction material additive. This invention was developed based on the fact that melamine resin can function as a physical property modifier by modifying it with various rubbers or elastomers such as thermoplastic resins. That is, the gist of the present invention is to contain a thermosetting dust containing as a friction modifier a melamine resin or a thermosetting dust whose main component is a modified melamine resin obtained by modifying a melamine resin with a thermoplastic resin, rubber, or elastomer in a range of 5 to 30%. This is an organic friction material characterized by the following. In addition, a friction material is known from JP-A No. 57-63376 in which a polyimide cured product dust is blended to improve wear resistance. It is a thermosetting dust mainly made of melamine resin, and its effect is to maintain the stability of the coefficient of friction, unlike those whose purpose is to improve wear resistance. [Function] According to the present invention, the organic friction material that uses thermosetting dust mainly composed of melamine resin as a friction modifier does not decrease its friction coefficient even after repeated friction, and is effective in maintaining friction stability. However, on the other hand, there is a problem in that the physical properties of the molded product, such as hardness, are harder than conventional friction materials. Therefore, attempts were made to adjust the physical properties of the melamine resin, such as its hardness, by blending various thermoplastic resins such as polyvinyl butyral, various rubbers, and elastomers such as NBR (nitrile-butadiene rubber) to modify the melamine resin. It is something to do. Although the amount of the thermoplastic resin, rubber, and elastomer used to modify the melamine resin cannot be determined uniquely, it is preferably in the range of 5 to 30%. The above-mentioned thermosetting dust can be obtained by heating and sufficiently curing melamine resin and pulverizing it into particles. In the present invention, organic friction materials include not only those using asbestos as a reinforcing material, but also those using glass fiber, steel wool, other ceramic fibers, mineral fibers, and metal fibers as reinforcing materials. . [Examples and Effects of the Invention] Organic friction materials were molded using the basic formulations shown in Table 1 below.
【表】
＊はカシユーダスト
＊＊はメラミンダスト
上記の比較例および実施例につき物性（硬度、
曲げ強度）を比較試験した結果を表２に示した。[Table] * indicates cashew dust ** indicates melamine dust Physical properties (hardness,
Table 2 shows the results of a comparative test of bending strength.
【表】
又比較例、実施例１および実施例４について摩
擦試験作業の１例を示せば第１図の通りである。
その際の制動条件はＰ：５Kg／cm2、Ｖ：7.5
ｍ／Ｓ、Ti：100℃でJIS定速型試験機を使用し
た。
これより本発明品は比較品に比し摩擦係数の安
定性維持に優れた効果のあることが認められる。[Table] An example of the friction test work for Comparative Example, Example 1 and Example 4 is shown in FIG. 1. The braking conditions at that time are P: 5Kg/cm 2 , V: 7.5
m/S, Ti: A JIS constant speed tester was used at 100°C. From this, it is recognized that the product of the present invention is more effective in maintaining the stability of the friction coefficient than the comparative product.
第１図は本発明品と比較品の摩擦試験を比較し
て示した図表である。
FIG. 1 is a chart showing a comparison of friction tests between products of the present invention and comparative products.
Claims (1)
の範囲で熱可塑性樹脂あるいはゴム、ないしはエ
ラストマーで変性してなる変性メラミン樹脂を主
成分とした熱硬化性ダストを摩擦調整剤として含
有することを特徴とする有機系摩擦材。 ２ アスベストを補強材とした特許請求の範囲第
１項記載の有機系摩擦材。 ３ ガラスフアイバーその他のセラミツク繊維、
スチールフアイバー等の鉱物または金属の繊維を
補強材とした特許請求の範囲第１項記載の有機系
摩擦材。[Claims] 1. Melamine resin or 5 to 30% melamine resin
An organic friction material characterized by containing thermosetting dust as a friction modifier, the main component of which is a modified melamine resin modified with a thermoplastic resin, rubber, or elastomer within the range of . 2. The organic friction material according to claim 1, which uses asbestos as a reinforcing material. 3 Glass fiber and other ceramic fibers,
The organic friction material according to claim 1, wherein the reinforcing material is mineral or metal fibers such as steel fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24977385A JPS62109860A (en) | 1985-11-07 | 1985-11-07 | Organic friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24977385A JPS62109860A (en) | 1985-11-07 | 1985-11-07 | Organic friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62109860A JPS62109860A (en) | 1987-05-21 |
| JPH055265B2 true JPH055265B2 (en) | 1993-01-21 |
Family
ID=17198010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24977385A Granted JPS62109860A (en) | 1985-11-07 | 1985-11-07 | Organic friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62109860A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06258972A (en) * | 1993-03-08 | 1994-09-16 | Hitachi Ltd | Image recorder |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5924745A (en) * | 1982-08-02 | 1984-02-08 | Matsushita Electric Works Ltd | Phenolic molding material and production thereof |
| JPS5924744A (en) * | 1982-08-02 | 1984-02-08 | Matsushita Electric Works Ltd | Phenolic molding material and production thereof |
-
1985
- 1985-11-07 JP JP24977385A patent/JPS62109860A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62109860A (en) | 1987-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |