JPH0774657B2 - Friction material for brake - Google Patents
Friction material for brakeInfo
- Publication number
- JPH0774657B2 JPH0774657B2 JP62275934A JP27593487A JPH0774657B2 JP H0774657 B2 JPH0774657 B2 JP H0774657B2 JP 62275934 A JP62275934 A JP 62275934A JP 27593487 A JP27593487 A JP 27593487A JP H0774657 B2 JPH0774657 B2 JP H0774657B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- friction material
- friction
- brake
- fibers
- 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、鉄道等の車両、産業機械等のブレーキ
パッド、ブレーキシューに使用される新規なブレーキ用
摩擦材に関するものである。TECHNICAL FIELD The present invention relates to a novel brake friction material used for vehicles such as automobiles and railways, brake pads for industrial machines and brake shoes.
[従来の技術] 従来、この種のブレーキ用摩擦材の主要繊維基材として
アスベストが多用されていたが、アスベストの発ガン性
が重大な問題として取りあげられ、アスベスト規制が各
国で設けられつつあり、アスベストを含まないブレーキ
用摩擦材に関する研究が数多くなされている。[Prior Art] Conventionally, asbestos has been widely used as a main fiber base material of this type of friction material for brakes, but carcinogenicity of asbestos has been taken up as a serious problem, and asbestos regulations are being established in various countries. There have been many studies on brake friction materials that do not contain asbestos.
例えばガラス繊維と芳香族ポリアミド繊維等の耐熱性有
機繊維を熱硬化性樹脂で結合した摩擦材(特開昭57−85
877号公報)や500℃前後で炭化する非溶融性の耐熱有機
繊維およびカルシウムメタシリケート繊維を摩擦性能改
質材と共に熱硬化性結合剤で結合してなる摩擦材(特開
昭58−13684号)が示されている。For example, a friction material in which heat-resistant organic fibers such as glass fibers and aromatic polyamide fibers are bonded with a thermosetting resin (Japanese Patent Laid-Open No. 57-85).
No. 877) or a non-melting heat resistant organic fiber and calcium metasilicate fiber carbonized at around 500 ° C. together with a friction performance modifier with a thermosetting binder (JP-A-58-13684). )It is shown.
しかしこれらの摩擦材に用いられているガラス繊維やカ
ルシウムメタシリケート繊維はアスベストに比べ繊維ど
うしのカラミが小さいため、高温時の摩耗量が増加する
などの問題点があり、本発明者らは、これらの問題点を
解決するため、金属繊維と耐熱性有機繊維およびアスペ
クト比が30〜40のカルシウムメタシリケート繊維と熱硬
化性樹脂および摩擦調整剤からなるブレーキ用摩擦材を
発明した(特願昭62−099565号)。However, since the glass fibers and calcium metasilicate fibers used in these friction materials have a smaller kalami of fibers than asbestos, there is a problem such as an increase in the amount of wear at high temperatures, the present inventors, In order to solve these problems, a brake friction material comprising metal fibers, heat-resistant organic fibers, calcium metasilicate fibers having an aspect ratio of 30 to 40, a thermosetting resin, and a friction modifier was invented (Japanese Patent Application No. 62-099565).
[発明が解決しようとする問題点] しかしながら、特願昭62−099565号に示されたブレーキ
用摩擦材に用いられているスチール繊維などの金属繊維
は、相手材であるディスクロータやドラムとの当接面に
おいて、相手材に攻撃をあたえてディスクロータを摩耗
させる。この摩耗によりディスクロータの寿命が短くな
るという問題点がある。[Problems to be Solved by the Invention] However, metal fibers such as steel fibers used in a friction material for a brake disclosed in Japanese Patent Application No. 62-099565 are not compatible with a disc rotor or a drum which is a mating material. At the contact surface, the mating material is attacked to wear the disc rotor. This wear causes a problem that the life of the disk rotor is shortened.
[問題点を解決するための手段] 本発明は上記問題点を解消し、常温時はもちろん、高温
時の耐摩耗性、耐フェード性に優れ、かつ相手材攻撃性
のないブレーキ用摩擦材を提供するものである。[Means for Solving Problems] The present invention solves the above problems, and provides a friction material for a brake which is excellent in wear resistance and fade resistance not only at room temperature but also at high temperature and which is not aggressive to the mating material. It is provided.
すなわち本発明は、マイクロビッカース硬さ70HV〜150H
Vの非鉄金属繊維、耐熱性有機繊維およびアスペクト比
が30〜40のカルシウムメタシリケート繊維からなる繊維
基材と熱硬化性樹脂および摩擦調整剤からなることを特
徴とするブレーキ用摩擦材である。That is, the present invention is a micro Vickers hardness 70HV ~ 150H
A friction material for a brake, which comprises a fiber base material composed of a non-ferrous metal fiber V, a heat-resistant organic fiber, and a calcium metasilicate fiber having an aspect ratio of 30 to 40, a thermosetting resin, and a friction modifier.
本発明で用いるマイクロビッカース硬さ70HV〜150HVの
非鉄金属繊維は、銅繊維および黄銅繊維の1種または混
合物が好ましい。これらの非鉄金属繊維は切削により製
造された繊維が好ましく、平均直径は10〜300μm、好
ましくは20〜60μmである。繊維長さは0.1〜10mm、好
ましくは1〜3mmである。非鉄金属繊維の配合量は、全
摩擦材量に対して5〜60重量%である。The non-ferrous metal fiber having a micro Vickers hardness of 70 HV to 150 HV used in the present invention is preferably one or a mixture of copper fiber and brass fiber. These non-ferrous metal fibers are preferably fibers produced by cutting and have an average diameter of 10 to 300 μm, preferably 20 to 60 μm. The fiber length is 0.1 to 10 mm, preferably 1 to 3 mm. The content of the non-ferrous metal fiber is 5 to 60% by weight based on the total amount of friction material.
本発明の耐熱性有機繊維とは、芳香族ポリアミド繊維、
ノボロイド繊維、全芳香族ポリエステル繊維であり、特
にフィブリル化した芳香族ポリアミド繊維が好ましい。The heat-resistant organic fiber of the present invention is an aromatic polyamide fiber,
Novoloid fibers and wholly aromatic polyester fibers are preferable, and fibrillated aromatic polyamide fibers are particularly preferable.
本発明のアスペクト比が30〜40のカルシウムメタシリケ
ート繊維とは、高い耐熱性(融点1540℃)があり、一般
にウォラストナイトとも呼ばれているもののうち、β型
の結晶構造をもったもので、その形状は針状または長柱
状をしており、アスペクト比は30〜40である 本発明は上記の繊維基材に、さらに必要に応じてスチー
ル繊維、チタン酸カリウム繊維、カーボン繊維などの繊
維を配合することを限定するものではない。The calcium metasilicate fibers having an aspect ratio of 30 to 40 of the present invention have high heat resistance (melting point 1540 ° C.), and among those generally called wollastonite, those having a β-type crystal structure. , The shape of which is needle-like or oblong, and the aspect ratio is 30 to 40. The present invention is a fiber such as steel fiber, potassium titanate fiber, carbon fiber, etc. It is not limited to mix.
本発明で用いる熱硬化性樹脂は、フェノール樹脂、メラ
ミン樹脂およびオイル、メラミン、エポキシ、ポリビニ
ルブチラールなどで変性されたフェノール樹脂、エポキ
シ樹脂、ポリエステル樹脂の1種または混合物である。The thermosetting resin used in the present invention is one or a mixture of a phenol resin, a melamine resin and a phenol resin modified with oil, melamine, epoxy, polyvinyl butyral, an epoxy resin, a polyester resin.
本発明の摩擦調整剤とは、グラファイト、シリカ粉、ア
ルミナ粉、硫酸バリウム、カシューダスト、珪藻土、炭
酸カルシウムなどである。The friction modifier of the present invention includes graphite, silica powder, alumina powder, barium sulfate, cashew dust, diatomaceous earth, calcium carbonate and the like.
本発明のブレーキ用摩擦材の製造方法は、従来より行わ
れている方法であり、次の通りである。The method for manufacturing the friction material for a brake of the present invention is a method that has been conventionally performed and is as follows.
繊維基材、熱硬化性樹脂および摩擦調整剤の所定の配合
量を、ヘンシェルミキサー、バンバリーミキサー、ニー
ダあるいはV型ブレンダー等で均一に混合する。つぎに
混合した材料を型内に充填し、押圧して予備成形を行
う。The predetermined amounts of the fiber base material, the thermosetting resin and the friction modifier are uniformly mixed with a Henschel mixer, a Banbury mixer, a kneader or a V-type blender. Next, the mixed material is filled in a mold and pressed to perform preforming.
この予備成形品を加熱加圧して、熱硬化性樹脂を硬化結
合させたのち、さらに熱処理をしてブレーキ用摩擦材を
得る。This preform is heated and pressed to harden and bond the thermosetting resin, and then further heat-treated to obtain a friction material for a brake.
[作用] 本発明のブレーキ用摩擦材は、マイクロビッカース硬さ
70〜150HVの非鉄金属繊維、耐熱性有機繊維および針状
または長柱状のアスペクト比30〜40のカルシウムメタシ
リケート繊維を繊維基材として使用するため、繊維間の
カラミ、繊維と結合剤のカラミが良く摩擦材が高温にさ
らされ、熱硬化性樹脂が炭化分解し結合力が低下しても
繊維基材の脱落が少なく、耐摩耗性がよい。[Operation] The friction material for a brake of the present invention has a micro Vickers hardness.
70-150 HV non-ferrous metal fibers, heat-resistant organic fibers and acicular or long columnar calcium metasilicate fibers with an aspect ratio of 30-40 are used as the fiber base material. Even if the friction material is exposed to high temperature and the thermosetting resin is carbonized and decomposed to lower the binding force, the fibrous base material is less likely to fall off and wear resistance is good.
さらに相手材への攻撃性が少なく、相手材が摩耗を起こ
すことがないので一層耐摩耗性が良好になる。Further, since the mating material is less aggressive and the mating material does not wear, the wear resistance is further improved.
また、針状または長柱状をしたアスペクト比30〜40のカ
ルシウムメタシリケート繊維を使用するため摩擦表面に
微少の気孔を多数形成でき、高温摩擦により熱硬化性樹
脂や耐熱性有機繊維が熱分解して発生するガスをすみや
かに吸収、拡散するため、摩擦係数が低下することがな
く耐フェード性が向上する。Also, since acicular or long pillar-shaped calcium metasilicate fibers with an aspect ratio of 30 to 40 are used, many minute pores can be formed on the friction surface, and thermosetting resin and heat resistant organic fibers are thermally decomposed by high temperature friction. Since the generated gas is immediately absorbed and diffused, the coefficient of friction is not lowered and the fade resistance is improved.
[実施例] 以下、本発明の実施例を示すが、本発明はこれに限定さ
れるものではない。[Examples] Examples of the present invention will be shown below, but the present invention is not limited thereto.
実施例1〜5および比較例1〜3 V型ブレンダーにて表−1に示す組成を均一に混合して
混合材料を得た。この混合材料を常温で面圧力300kg/cm
2に調整した成形機にて20秒間予備成形し、予備成形品
を得た。その後面圧力300kg/cm2金型温度150℃に温調し
た成形機を用いて7分間加熱加圧成形した。Examples 1 to 5 and Comparative Examples 1 to 3 A V type blender was used to uniformly mix the compositions shown in Table 1 to obtain mixed materials. The surface pressure of this mixed material is 300kg / cm at room temperature.
Pre-molding was performed for 20 seconds with a molding machine adjusted to 2 to obtain a pre-molded product. Then, the surface pressure was 300 kg / cm 2 and the mixture was heated and pressed for 7 minutes using a molding machine whose mold temperature was adjusted to 150 ° C.
その後250℃で3時間加熱炉内で熱処理をし、放冷後所
定寸法に研磨してブレーキパッド用摩擦材を得た。Then, it was heat-treated in a heating furnace at 250 ° C. for 3 hours, allowed to cool, and then ground to a predetermined size to obtain a friction material for a brake pad.
表−1の各例の配合によって得た摩擦材についてブレー
キダイナモメータ試験機で耐摩耗性試験、耐フェード性
試験を行った。A friction material and a fade resistance test were conducted on a friction material obtained by the formulation of each example in Table 1 with a brake dynamometer tester.
耐摩耗性試験はJASO−C427−83、耐フェード性試験はJA
SO−C406−82に従って行った。JASO-C427-83 for abrasion resistance test, JA for fade resistance test
Performed according to SO-C406-82.
[発明の効果] 表−2から明らかなように、本発明の摩擦材は、従来の
摩擦材に比べ、摩擦材の摩耗率が少なく、耐久性が良好
であり、相手材攻撃性は、ロータの摩耗量が少なく攻撃
性が少ないことが判る。耐フェード性については、制動
回数10回繰返した次の一制動中の最小摩擦係数は高く、
耐フェード性は良好である。 [Effects of the Invention] As is clear from Table 2, the friction material of the present invention has a smaller wear rate of the friction material and better durability than the conventional friction material. It can be seen that the amount of wear is small and the aggression is small. Regarding the fade resistance, the minimum friction coefficient during the next one braking after repeating the number of braking 10 times is high,
Good fade resistance.
以上のように、本発明により得られた摩擦材は、摩耗
性、耐フェード性はもちろんのこと相手材攻撃性の少な
いブレーキ用摩擦材である。As described above, the friction material obtained by the present invention is a friction material for brakes which is not only wear-resistant and fade-resistant but also has little attacking property of the mating material.
Claims (2)
削された非鉄金属繊維、耐熱性有機繊維およびアスペク
ト比が30〜40のカルシウムメタシリケート繊維からなる
繊維基材と熱硬化性樹脂および摩擦調整剤からなること
を特徴とするブレーキ用摩擦材。1. A fiber base material comprising a cut non-ferrous metal fiber having a micro Vickers hardness of 70 HV to 150 HV, a heat resistant organic fiber, and a calcium metasilicate fiber having an aspect ratio of 30 to 40, a thermosetting resin, and a friction modifier. A friction material for brakes, which is made of
とも1種である特許請求の範囲第1項記載のブレーキ用
摩擦材。2. The friction material for a brake according to claim 1, wherein the non-ferrous metal fiber is at least one kind of copper fiber and brass fiber.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62275934A JPH0774657B2 (en) | 1987-10-30 | 1987-10-30 | Friction material for brake |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62275934A JPH0774657B2 (en) | 1987-10-30 | 1987-10-30 | Friction material for brake |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01120446A JPH01120446A (en) | 1989-05-12 |
JPH0774657B2 true JPH0774657B2 (en) | 1995-08-09 |
Family
ID=17562463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62275934A Expired - Fee Related JPH0774657B2 (en) | 1987-10-30 | 1987-10-30 | Friction material for brake |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0774657B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04168146A (en) * | 1990-10-31 | 1992-06-16 | Sumitomo Bakelite Co Ltd | Electrically conductive phenolic resin molding material |
JP5578391B2 (en) * | 2007-04-13 | 2014-08-27 | 日産自動車株式会社 | Non-asbestos friction material |
WO2008133056A1 (en) * | 2007-04-13 | 2008-11-06 | Nissan Motor Co., Ltd. | Non-asbestos friction material |
US20150204403A1 (en) * | 2012-08-13 | 2015-07-23 | Rockwool International A/S | Graphite Coated Fibres |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5872737A (en) * | 1981-10-27 | 1983-04-30 | Aisin Chem Co Ltd | Car friction material manufacturing method |
JPS5943238A (en) * | 1982-09-03 | 1984-03-10 | Akebono Brake Ind Co Ltd | Friction material |
JPS62215678A (en) * | 1986-03-17 | 1987-09-22 | Aisin Chem Co Ltd | Friction material for brake |
-
1987
- 1987-10-30 JP JP62275934A patent/JPH0774657B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH01120446A (en) | 1989-05-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |