JP2879364B2 - Non-asbestos friction material - Google Patents
Non-asbestos friction materialInfo
- Publication number
- JP2879364B2 JP2879364B2 JP22245090A JP22245090A JP2879364B2 JP 2879364 B2 JP2879364 B2 JP 2879364B2 JP 22245090 A JP22245090 A JP 22245090A JP 22245090 A JP22245090 A JP 22245090A JP 2879364 B2 JP2879364 B2 JP 2879364B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- friction material
- asbestos
- component
- potassium titanate
- 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 - Fee Related
Links
Landscapes
- Braking Arrangements (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、自動車のブレーキパッド,ブレーキライニ
ング,クラッチフェーシング等として使用される摩擦材
であって、繊維成分として石綿を含まず、鳴き性能及び
高温における耐摩耗性が優れている上に、摩擦性能も良
好な非石綿系摩擦材に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a friction material used as a brake pad, a brake lining, a clutch facing and the like of an automobile, which does not contain asbestos as a fiber component, and has a squealing performance. The present invention relates to a non-asbestos-based friction material having excellent abrasion resistance at high temperatures and good friction performance.
従来、自動車のブレーキパッド,ブレーキライニン
グ,クラッチフェーシング等に使用される摩擦材は、そ
の基材として石綿が多く使用されているが、石綿はその
粉塵が人体への有害性を指摘された結果、その使用を規
制されつつあり、石綿を使用しない摩擦材に対する要求
が強くなってきている。Conventionally, asbestos has been widely used as a base material for friction materials used for automobile brake pads, brake linings, clutch facings, etc. As a result of the finding that asbestos dust is harmful to the human body, Its use is being regulated, and there is an increasing demand for friction materials that do not use asbestos.
そこで、石綿を使用しない非石綿系摩擦材について多
くの提案がなされているが、それらの多くは繊維成分と
して耐熱性有機繊維,ガラス繊維,金属繊維を用い、結
合材としてフェノール樹脂等の熱硬化性樹脂を、充填材
粉末成分として黒鉛,硫酸バリウム,アルミナ等を用い
たものである。Therefore, many proposals have been made for non-asbestos-based friction materials that do not use asbestos, but most of them use heat-resistant organic fibers, glass fibers, and metal fibers as fiber components and use thermosetting materials such as phenolic resins as binders. The resin is made of graphite, barium sulfate, alumina or the like as a filler powder component.
然し乍ら、結合材として上記のフェノール樹脂等の熱
硬化性樹脂を使用した摩擦材は、高温下では前記樹脂が
融解または分解してガスが発生し、フェード現象を起こ
して摩擦係数が不安定になるという問題点がある。However, in a friction material using a thermosetting resin such as the above-mentioned phenol resin as a binder, the resin melts or decomposes at a high temperature to generate gas, which causes a fade phenomenon and an unstable friction coefficient. There is a problem.
この問題点を解決するために、前記樹脂成分を摩擦材
全量の15〜25体積%と少量に抑えているのが現状である
が、有機結合材を減少させると、摩擦材の強度及び耐摩
耗性の低下を避けることは出来なかった。即ち、非石綿
系の摩擦材にあっては、石綿系の摩擦材に比して結合材
の量を多くしないと、摩擦材としての充分な強度及び耐
摩耗性を得られないのである。At present, in order to solve this problem, the resin component is suppressed to a small amount of 15 to 25% by volume of the total amount of the friction material. However, when the amount of the organic binder is reduced, the strength and wear resistance of the friction material are reduced. Sexual decline could not be avoided. That is, in the non-asbestos-based friction material, unless the amount of the binder is larger than that of the asbestos-based friction material, sufficient strength and wear resistance as the friction material cannot be obtained.
そこで、繊維成分中に鉄系繊維を含ませたものも考え
られたが、鉄系繊維を用いた摩擦材は一般に熱伝導率が
高く、高温時の耐摩耗性や耐フェード性等には優れてい
るものの、重量が重かったり、高温時に発火するという
問題点があるばかりではなく、ディスクローター等の相
手材に対する攻撃性が大きいという欠点がある。Therefore, it was conceived that iron-based fibers were included in the fiber component, but friction materials using iron-based fibers generally have high thermal conductivity and are excellent in wear resistance and fade resistance at high temperatures. However, not only is there a problem of heavy weight or ignition at high temperatures, but also there is a drawback that the aggressiveness to a counterpart material such as a disk rotor is large.
従って、本発明が解決しようとする課題は、上記の非
石綿系摩擦材において、対面攻撃性が小さく、低温から
高温まで安定した摩擦性能を示し、鳴き性能が優れた摩
擦材を提供することである。Therefore, the problem to be solved by the present invention is to provide a friction material which has low face-to-face aggression, exhibits stable friction performance from low to high temperatures, and has excellent squealing performance. is there.
本発明は上記の課題を解決することを目的としてなさ
れたもので、その構成は、石綿以外の繊維成分と、フェ
ノール樹脂等の熱硬化性樹脂成分と、黒鉛,硫酸バリウ
ム等の充填材粉末成分とを含有する摩擦材において、繊
維長が0.1〜3mm、繊維径が10〜60μmのチタン酸カリウ
ム繊維(以下、チタン酸カリウム繊維Aという)及び繊
維長が10〜30μm、繊維径が0.2〜0.5μmのチタン酸カ
リウム繊維(以下、チタン酸カリウム繊維Bという)を
含むことを特徴とするものである。The present invention has been made for the purpose of solving the above-mentioned problems, and its composition is a fiber component other than asbestos, a thermosetting resin component such as a phenol resin, and a filler powder component such as graphite and barium sulfate. And a potassium titanate fiber having a fiber length of 0.1 to 3 mm and a fiber diameter of 10 to 60 μm (hereinafter referred to as potassium titanate fiber A) and a fiber length of 10 to 30 μm and a fiber diameter of 0.2 to 0.5. It is characterized by containing a potassium titanate fiber of μm (hereinafter referred to as potassium titanate fiber B).
即ち、本発明の発明者は、低温から高温まで安定した
摩擦性能を示し、鳴き性能及び高温時における耐摩耗性
が優れた非石綿系摩擦材を得ることを目的として研究を
重ねた結果、繊維成分の少なくとも一部に形状の異なる
2種類のチタン酸カリウム繊維を特定量含ませることに
より、上記の目的を達成できることを知得し、本発明を
なし遂げたのである。That is, the inventor of the present invention showed stable friction performance from low to high temperatures, and as a result of repeatedly conducting research for the purpose of obtaining a non-asbestos-based friction material having excellent squealing performance and abrasion resistance at high temperatures, a fiber was obtained. The inventors have found that the above object can be achieved by including at least a part of two kinds of potassium titanate fibers having different shapes in at least a part of the components, thereby accomplishing the present invention.
尚、上記におけるチタン酸カリウム繊維の含有合計量
は、摩擦材全量に対して、5〜30体積%が望ましく、5
%以下では摩擦係数の安定性が悪く、30%以上では繊維
の比表面積が大きくなるため、フェノール樹脂等のバイ
ンダーを多くしないと強度を確保出来なくなり、性能の
悪化を招くおそれがある。The total content of the potassium titanate fiber in the above is preferably 5 to 30% by volume based on the total amount of the friction material.
% Or less, the stability of the friction coefficient is poor, and if it is 30% or more, the specific surface area of the fiber becomes large. Therefore, unless the amount of the binder such as phenolic resin is increased, the strength cannot be secured and the performance may be deteriorated.
而して、本発明において、チタン酸カリウム繊維以外
で繊維成分として使用されるものには、アラミド繊維等
の有機繊維、ガラス繊維,ロックウール,セラミック繊
維等の無機繊維、銅,青銅,アルミニウム,黄銅等の金
属繊維が挙げられ、また、結合材としては、フェノール
樹脂,尿素樹脂,メラミン樹脂またはそれらの変性樹脂
のような熱硬化性樹脂や、ポリアセタール,芳香族ポリ
イミド樹脂,フッ素樹脂等の耐熱性樹脂が挙げられ、充
填材としては、黒鉛,金属粉,二硫化モリブデン,カシ
ューダストのような潤滑作用のあるものや、硫酸バリウ
ム,炭酸カルシウム等が挙げられる。In the present invention, those used as fiber components other than potassium titanate fiber include organic fibers such as aramid fiber, inorganic fibers such as glass fiber, rock wool and ceramic fiber, copper, bronze, aluminum, and the like. Examples of the binder include metal fibers such as brass, and examples of the binder include a thermosetting resin such as a phenol resin, a urea resin, a melamine resin, or a denatured resin thereof; And a filler having lubricating action such as graphite, metal powder, molybdenum disulfide and cashew dust, and barium sulfate and calcium carbonate.
本発明摩擦材は非石綿摩擦材であって、繊維成分の少
なくとも一部に形状の異なる2種類のチタン酸カリウム
繊維を用いることにより、対面攻撃性が小さく、低温か
ら高温まで安定した摩擦性能を示すと共に、鳴き性能が
向上する。The friction material of the present invention is a non-asbestos friction material. By using two types of potassium titanate fibers having different shapes for at least a part of the fiber component, the face-to-face aggressiveness is small and stable friction performance from low to high temperatures is obtained. In addition, the squeal performance is improved.
次に、本発明の実施例について説明する。 Next, examples of the present invention will be described.
結合材としてフェノール樹脂を、充填材として黒鉛,
硫酸バリウムをそれぞれ用い、繊維基材として、アラミ
ド繊維,ロックウール,金属繊維,チタン酸カリウムA
及びBを用いて、これらを均一に混合し、室温、圧力40
0kg/cm2で予備成型した後、温度150℃、圧力400kg/cm2
で10分間、過熱加圧成型し、次いで温度180℃で5時間
熱処理して、表1に示す実施例I,IIの摩擦材を得た。な
お、表中の数値は体積%を表す。Phenol resin as binder, graphite as filler,
Aramid fiber, rock wool, metallic fiber, potassium titanate A
And B were mixed uniformly at room temperature under a pressure of 40
After preforming at 0 kg / cm 2 , temperature 150 ° C, pressure 400 kg / cm 2
For 10 minutes, followed by heat treatment at 180 ° C. for 5 hours to obtain the friction materials of Examples I and II shown in Table 1. The numerical values in the table represent% by volume.
上記実施例の組成において、チタン酸カリウム繊維を
1種類にし、同様にして比較例I,IIを得た。In the composition of the above example, one kind of potassium titanate fiber was used, and Comparative Examples I and II were similarly obtained.
これらの摩擦材をJASO「乗用車ブレーキ装置ダイナモ
メーター試験方法」に規定されている摩擦性能試験法に
よりテストを行なった結果及び実車により鳴き試験を行
った結果を表2に示す。Table 2 shows the results of a test of these friction materials according to the friction performance test method specified in JASO "Test Method for Dynamometer of Passenger Car Brake System" and the results of a squeal test performed on an actual vehicle.
〔発明の効果〕 以上のように、繊維基材として石綿を含まない本発明
非石綿系摩擦材は、実施例に示したように、アラミド繊
維等の有機繊維やロックウール等の無機繊維、銅繊維等
の金属系繊維、フェノール樹脂等の結合材及び黒鉛,硫
酸バリウム等の充填材成分から成るもので、前記繊維成
分の少なくとも一部に形状の異なる2種類のチタン酸カ
リウム繊維を特定量含ませた結果、低温から高温まで安
定した摩擦性能を示し鳴き性能かつ高温時における摩耗
特性が上記の通り向上するので、自動車のブレーキパッ
ド,ブレーキライニング,クラッチフェーシング等に使
用する摩擦材として好適である。 [Effect of the Invention] As described above, the non-asbestos-based friction material of the present invention which does not contain asbestos as a fiber base material includes, as shown in Examples, organic fibers such as aramid fibers, inorganic fibers such as rock wool, and copper. It comprises a metal fiber such as fiber, a binder such as phenolic resin, and a filler component such as graphite and barium sulfate. At least a part of the fiber component contains two kinds of potassium titanate fibers having different shapes in a specific amount. As a result, stable friction performance from low to high temperatures is exhibited, and squealing performance and wear characteristics at high temperatures are improved as described above. Therefore, it is suitable as a friction material used for automobile brake pads, brake linings, clutch facings, and the like. .
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−62926(JP,A) 特開 昭59−80543(JP,A) (58)調査した分野(Int.Cl.6,DB名) C09K 3/14 F16D 69/02 WPI/L(QUESTEL)────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-62926 (JP, A) JP-A-59-80543 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) C09K 3/14 F16D 69/02 WPI / L (QUESTEL)
Claims (3)
の熱硬化性樹脂成分と、黒鉛,硫酸バリウム等の充填材
粉末成分とを含有する摩擦材において、前記繊維成分の
少なくとも一部に形状の異なる2種類のチタン酸カリウ
ム繊維を含み、そのうち1種類は繊維長が0.1〜3mm、繊
維径が10〜60μmであり、他の1種類は繊維長が10〜30
μm、繊維径が0.2〜0.5μmであることを特徴とする非
石綿系摩擦材。1. A friction material containing a fiber component other than asbestos, a thermosetting resin component such as a phenol resin, and a filler powder component such as graphite and barium sulfate, wherein at least a part of the fiber component has a shape. Of two types of potassium titanate fibers, one of which has a fiber length of 0.1 to 3 mm and a fiber diameter of 10 to 60 μm, and the other has a fiber length of 10 to 30
A non-asbestos-based friction material characterized by having a fiber diameter of 0.2 to 0.5 μm.
維の量が0.5〜20体積%であり、その合計が5〜30体積
%であることを特徴とする請求項1に記載の非石綿系摩
擦材。2. The non-asbestos-based friction material according to claim 1, wherein the amount of each potassium titanate fiber is 0.5 to 20% by volume relative to the total amount of the friction material, and the total amount is 5 to 30% by volume. Wood.
機繊維、ガラス繊維,ロックウール,セラミック繊維等
の無機繊維、銅,青銅,アルミニウム,黄銅等の金属繊
維であることを特徴とする請求項1に記載の非石綿系摩
擦材。3. The fiber component other than asbestos is an organic fiber such as aramid fiber, an inorganic fiber such as glass fiber, rock wool and ceramic fiber, and a metal fiber such as copper, bronze, aluminum and brass. Item 2. The non-asbestos-based friction material according to Item 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22245090A JP2879364B2 (en) | 1990-08-27 | 1990-08-27 | Non-asbestos friction material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22245090A JP2879364B2 (en) | 1990-08-27 | 1990-08-27 | Non-asbestos friction material |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04106183A JPH04106183A (en) | 1992-04-08 |
JP2879364B2 true JP2879364B2 (en) | 1999-04-05 |
Family
ID=16782600
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22245090A Expired - Fee Related JP2879364B2 (en) | 1990-08-27 | 1990-08-27 | Non-asbestos friction material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2879364B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6670408B2 (en) | 1999-12-20 | 2003-12-30 | Akebono Brake Industry Co., Ltd. | Friction material |
WO2007080975A1 (en) * | 2006-01-13 | 2007-07-19 | Hitachi Chemical Co., Ltd. | Composition for friction material and friction material using same |
WO2008156161A1 (en) * | 2007-06-20 | 2008-12-24 | Hitachi Chemical Co., Ltd. | Friction material composition, and friction material using the same |
US7833340B2 (en) * | 2004-04-26 | 2010-11-16 | Showa Denko K.K. | Coating material and use thereof |
CN103059807A (en) * | 2012-10-31 | 2013-04-24 | 瑞阳汽车零部件(仙桃)有限公司 | Friction material composition for high-performance brake pad |
CN103906942A (en) * | 2011-08-18 | 2014-07-02 | 费德罗-莫格尔公司 | Friction material for brakes |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106051001B (en) * | 2015-11-24 | 2018-05-01 | 王永红 | The organic brake block of the three-dimensional composite strengthening of one kind environmental protection and its technology of preparing |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5980543A (en) * | 1982-10-29 | 1984-05-10 | Aisin Chem Co Ltd | Friction material for car |
JPS6362926A (en) * | 1986-09-01 | 1988-03-19 | Aisin Chem Co Ltd | Friction material |
-
1990
- 1990-08-27 JP JP22245090A patent/JP2879364B2/en not_active Expired - Fee Related
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6670408B2 (en) | 1999-12-20 | 2003-12-30 | Akebono Brake Industry Co., Ltd. | Friction material |
US7833340B2 (en) * | 2004-04-26 | 2010-11-16 | Showa Denko K.K. | Coating material and use thereof |
WO2007080975A1 (en) * | 2006-01-13 | 2007-07-19 | Hitachi Chemical Co., Ltd. | Composition for friction material and friction material using same |
JP5358949B2 (en) * | 2006-01-13 | 2013-12-04 | 日立化成株式会社 | Friction material composition and friction material using the same |
WO2008156161A1 (en) * | 2007-06-20 | 2008-12-24 | Hitachi Chemical Co., Ltd. | Friction material composition, and friction material using the same |
JP2009024153A (en) * | 2007-06-20 | 2009-02-05 | Hitachi Chem Co Ltd | Friction material composition, and friction material using the same |
CN101679838B (en) * | 2007-06-20 | 2013-05-29 | 日立化成株式会社 | Friction material composition, and friction material using the same |
CN103906942A (en) * | 2011-08-18 | 2014-07-02 | 费德罗-莫格尔公司 | Friction material for brakes |
CN103059807A (en) * | 2012-10-31 | 2013-04-24 | 瑞阳汽车零部件(仙桃)有限公司 | Friction material composition for high-performance brake pad |
CN103059807B (en) * | 2012-10-31 | 2015-05-20 | 瑞阳汽车零部件(仙桃)有限公司 | Friction material composition for high-performance brake pad |
Also Published As
Publication number | Publication date |
---|---|
JPH04106183A (en) | 1992-04-08 |
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