JPH0723740B2 - Brake friction material - Google Patents
Brake friction materialInfo
- Publication number
- JPH0723740B2 JPH0723740B2 JP9956587A JP9956587A JPH0723740B2 JP H0723740 B2 JPH0723740 B2 JP H0723740B2 JP 9956587 A JP9956587 A JP 9956587A JP 9956587 A JP9956587 A JP 9956587A JP H0723740 B2 JPH0723740 B2 JP H0723740B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- friction
- friction material
- fibers
- brake
- 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
- 239000002783 friction material Substances 0.000 title claims description 24
- 239000000835 fiber Substances 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 229920001187 thermosetting polymer Polymers 0.000 claims description 11
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 9
- 235000012241 calcium silicate Nutrition 0.000 claims description 9
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000003607 modifier Substances 0.000 claims description 6
- 239000010425 asbestos Substances 0.000 description 6
- 229910052895 riebeckite Inorganic materials 0.000 description 6
- 239000003365 glass fiber Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000004760 aramid Substances 0.000 description 3
- 229920003235 aromatic polyamide Polymers 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012210 heat-resistant fiber Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 244000226021 Anacardium occidentale Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920006282 Phenolic fiber Polymers 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 235000020226 cashew nut Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229940056319 ferrosoferric oxide Drugs 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
Landscapes
- Braking Arrangements (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は新規なブレーキ用摩擦材に関し、さらに詳しく
は、特に高温における耐摩耗性および耐フェード性に優
れた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, and more particularly to a brake friction material having excellent wear resistance and fade resistance, especially at high temperatures. .
［従来の技術］ 従来、ブレーキ用摩擦材の主要繊維基材としてアスベス
トが多く使用されている。しかし近年アスベストが人体
に有害であると言う報告がなされ、アスベスト公害とし
てクローズアップされており、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 is often used as a main fiber base material of a friction material for a brake. However, in recent years, it has been reported that asbestos is harmful to the human body, and it has been highlighted as asbestos pollution, and there have been many studies on friction materials for brakes that do not contain asbestos.
例えば特開昭57-85877号公報には、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
合した摩擦材が開示されている。また特開昭58-13684号
公報には、熱伝導率が0.07〜0.15Kcal/m.hr.℃で、500
℃前後で炭化する非溶融性の耐熱有機質繊維およびカル
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が開示されている。For example, JP-A-57-85877 discloses a friction material in which glass fibers and heat-resistant organic fibers such as aromatic polyamide fibers are bonded with a thermosetting resin. Further, JP-A-58-13684 discloses that the thermal conductivity is 0.07 to 0.15 Kcal / m.hr.
A friction material is disclosed in which a non-melting heat-resistant organic fiber and a calcium metasilicate fiber which are carbonized at around 0 ° C. are bonded together with a friction performance modifier with a thermosetting binder.
［発明が解決しようとする問題点］ しかしながら、特開昭57-85877号公報に開示された摩擦
材は、構成繊維基材であるガラス繊維はアスベストよう
なカラミがないため、摩擦材表面が高温になり熱硬化性
樹脂が炭化、分解を始め結合力が低下するとガラス繊維
は脱落しやすくなり、摩耗量が増大する。また、耐熱性
有機繊維が高温で分解してガスを発生すると、摩擦係数
が低下し、いわゆるフェード現象を起すという問題点が
ある。また特開昭58-13684号公報に開示された摩擦材
は、構成繊維基材であるカルシウムメタシリケート繊維
は繊維径が３〜９ミクロン、繊維長さが平均して繊維径
の13〜15倍のもので比較的短い繊維であり、かつガラス
繊維と同様にカラミが少ないため、高温での摩耗量が増
大するという問題点がある。[Problems to be Solved by the Invention] However, in the friction material disclosed in Japanese Patent Laid-Open No. 57-85877, the glass fiber, which is a constituent fiber base material, does not have as much asami such as asbestos. When the thermosetting resin becomes carbonized and decomposes and the binding force is lowered, the glass fiber is likely to drop off, and the amount of abrasion increases. Further, when the heat-resistant organic fiber is decomposed at a high temperature to generate a gas, the coefficient of friction is lowered and a so-called fade phenomenon occurs. Further, in the friction material disclosed in Japanese Patent Laid-Open No. 58-13684, the calcium metasilicate fiber, which is a constituent fiber base material, has a fiber diameter of 3 to 9 microns, and the fiber length is 13 to 15 times the fiber diameter on average. Since it is a relatively short fiber and has a small amount of blemishes like glass fiber, there is a problem in that the amount of wear at high temperatures increases.
［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、人体に無害の材料
を使った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 has excellent friction resistance and fade resistance not only at room temperature but also at high temperature, and a friction material for a brake using a material harmless to the human body. Is provided.
すなわち本発明は、金属繊維と耐熱性有機繊維とアスペ
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 friction material for a brake, which is characterized by comprising a metal fiber, a heat-resistant organic fiber, and a fiber base material made of calcium metasilicate fiber having an aspect ratio of 30 to 40, a thermosetting resin, and a friction modifier. is there.
本発明で用いる金属繊維は、平均直径は10〜300μｍで
あり好ましくは50〜100μｍである。繊維長は0.1〜10mm
であり好ましくは１〜3mmである。金属繊維としては、
スチール繊維、しんちゅう繊維、ステンレススチール繊
維、チタン繊維などの単独または混合物が用いられる。
好ましくはスチール繊維、しんちゅう繊維である。スチ
ール繊維の表面は四三酸化鉄皮膜、樹脂被覆またはメッ
キ処理などの処理がほどこされれていても良く、また未
処理のものでも良い。The metal fibers used in the present invention have an average diameter of 10 to 300 μm, preferably 50 to 100 μm. Fiber length is 0.1-10 mm
And preferably 1 to 3 mm. As a metal fiber,
Steel fibers, brass fibers, stainless steel fibers, titanium fibers and the like may be used alone or in a mixture.
Steel fibers and brass fibers are preferred. The surface of the steel fiber may be treated with a ferrosoferric oxide film, a resin coating or a plating treatment, or may be an untreated one.
本発明の耐熱性有機繊維とは、芳香族ポリアミド繊維、
ノボロイド繊維などであり、フィブリル化された芳香族
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,
Fibrillated aromatic polyamide fibers such as novoloid fibers are preferred.
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、そのアスペクト比（L/D比）は30〜40で
ある（例えばインドで産出するWolkem社製ケモリッ
ト）。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 commonly called wollastonite, those having a β-type crystal structure. , Its shape is needle-like or oblong, and its aspect ratio (L / D ratio) is 30 to 40 (for example, Wolkem Chemolit produced in India).
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、またはオイル、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等の単
独または混合物が用いられる。As the thermosetting resin used in the present invention, a phenol resin, a melamine resin, or a phenol resin modified with oil, melamine, epoxy, polyvinyl butyral, or the like is used alone or in a mixture.
本発明の摩擦調製剤とは、黒鉛、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.
金属繊維、耐熱性有機繊維、カルシウムメタシリケー
ト、熱硬化性樹脂および摩擦調整剤の所定配合量を、バ
ンバリーミキサー、ヘンシルミキサー、ニーダあるいは
Ｖ型ブレンダー等で十分均一に混合する。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 metal fibers, heat-resistant organic fibers, calcium metasilicate, thermosetting resin, and friction modifier are mixed in predetermined amounts in a Banbury mixer, a Hensyl mixer, a kneader, a V-type blender, or the like. 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、熱硬化性樹脂で硬化結
合したのち、さらに熱処理をして、ブレーキ用摩擦材を
製造する。The preformed product is heated and pressed to be hardened and bonded with a thermosetting resin, and then heat-treated to produce a friction material for a brake.
［作用］ 本発明のブレーキ摩擦材は、金属繊維および針状または
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を始め結合力が低下しても
繊維基材の脱落がなく、耐摩耗性が良い。[Operation] Since the brake friction material of the present invention uses the metal fiber and the acicular or oblong calcium metasilicate having an aspect ratio of 30 to 40 as the fiber base material, the kalami between the fibers and the kalami of the fiber and the binder are used. Even if the friction material is exposed to a high temperature and the thermosetting resin begins to be decomposed by carbonization and the binding force is reduced, the fiber base material does not fall off and the wear resistance is good.
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使用するため、摩擦材表面に微
少の気孔を多数形成でき、高温で摩擦したときに熱硬化
性樹脂や、耐熱性繊維などの有機物成分が分解して発生
するガスをすみやかに吸収するので、摩擦係数が低下で
ず、耐フェード性は向上する。In addition, since acicular or long pillar-shaped calcium metasilicate with an aspect ratio of 30-40 is used, a large number of minute pores can be formed on the friction material surface, and when it is rubbed at high temperature, thermosetting resin, heat-resistant fiber, etc. Since the organic substance component is decomposed and the generated gas is absorbed promptly, the friction coefficient 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１〜２ 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に調製した成形機にて20秒間予備成形し組成材を得
た。その後面圧力300kg/cm2金型温度150℃に調製した成
形機を用いて７分間加熱加圧成形した。その後250℃で
２時間30分間加熱炉内で熱処理をし、放冷後所定寸法に
研磨して摩擦材を得た。Examples 1 to 5 and Comparative Examples 1 to 2 The compositions shown in Table 1 were uniformly mixed with a V-type blender to obtain mixed materials. The surface pressure of this mixed material is 300kg / cm at room temperature.
A composition material was obtained by preforming for 20 seconds with the molding machine prepared in 2 . After that, heat pressure molding was performed for 7 minutes using a molding machine adjusted to a surface pressure of 300 kg / cm 2 mold temperature of 150 ° C. After that, heat treatment was performed in a heating furnace at 250 ° C. for 2 hours and 30 minutes, and after cooling, the friction material was obtained by polishing to a predetermined size.
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、耐摩耗性能試験と耐フェード
試験をした。The friction materials obtained by blending each example in Table 1 were subjected to an abrasion resistance test and a fade resistance test with a brake dynamometer tester.
耐摩耗性試験の方法はJASO-C427-83［ブレーキ型:PD51
s、ロータ:18mmベンチレーテッドタイプ、イナーシャ
（負荷）:4.0kg・ｍ・s2、制動初速度:50km/h、減速度:
0.3G］である。The abrasion resistance test method is JASO-C427-83 [brake type: PD51
s, rotor: 18 mm ventilated type, inertia (load): 4.0 kg ・ m ・ s 2 , braking initial speed: 50 km / h, deceleration:
0.3G].
耐フェード性試験の方法はJASO-C406-82［ブレーキ型
式:PD51s、ロータ:18mmベンチレーテッドタイプ、イナ
ーシャ（負荷）:5.0kg・ｍ・s2，制動初速度:100km/h、
制動間隔:35秒、制動回数:10回、減速度:0.45G］であ
る。JASO-C406-82 [Brake type: PD51s, rotor: 18mm ventilated type, inertia (load): 5.0kg ・ m ・ s 2 , braking initial speed: 100km / h,
Braking interval: 35 seconds, braking frequency: 10 times, deceleration: 0.45G].
表−２に示されるように、実施例１〜実施例５の摩擦材
は、比較例１〜比較例２の摩擦材と比べ摩耗率が小さく
（特に高温域で）、同じく表−２に示されるように実施
例１〜実施例５の摩擦材は、比較例１〜比較例２の摩擦
材に比べ、制動回転を繰返した後の一制動中の最小摩擦
係数は高く、耐フェード性が優れている。As shown in Table-2, the friction materials of Examples 1 to 5 have smaller wear rates than those of Comparative Examples 1 to 2 (especially in a high temperature range), and also shown in Table-2. As described above, the friction materials of Examples 1 to 5 have a higher minimum friction coefficient during one braking after repeated braking rotations and excellent fade resistance as compared with the friction materials of Comparative Examples 1 and 2. ing.
［発明の効果］ 本発明のブレーキ用摩擦材は、金属繊維、耐熱性繊維お
よびアスペクト比が30〜40のカルシウムメタシリケート
繊維の繊維基材と熱硬化性樹脂および摩擦調整剤を含有
しているため、表１の結果に見られるように、高温（50
0℃）での摩耗率が小さく、かつ最小摩擦係数が高く耐
フェード性に優れている。 EFFECT OF THE INVENTION The friction material for a brake of the present invention contains a fiber base material of metal fiber, heat resistant fiber and calcium metasilicate fiber having an aspect ratio of 30 to 40, a thermosetting resin and a friction modifier. Therefore, as seen in the results in Table 1, high temperature (50
The wear rate at 0 ° C) is small, the minimum friction coefficient is high, and the fade resistance is excellent.
以上のように本発明により作業環境や大気を石綿で汚染
することなく、高温での使用において耐摩耗性、耐フェ
ード性に優れた性能を有するブレーキ用摩擦材を提供す
ることができる。As described above, according to the present invention, it is possible to provide a friction material for a brake which has excellent wear resistance and fade resistance in use at high temperature without contaminating the work environment or the atmosphere with asbestos.
Claims (1)
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 friction material for a brake, comprising a fiber base material composed of metal fibers, heat resistant organic fibers, calcium metasilicate fibers having an aspect ratio of 30 to 40, a thermosetting resin and a friction modifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9956587A JPH0723740B2 (en) | 1987-04-22 | 1987-04-22 | Brake friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9956587A JPH0723740B2 (en) | 1987-04-22 | 1987-04-22 | Brake friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63266231A JPS63266231A (en) | 1988-11-02 |
| JPH0723740B2 true JPH0723740B2 (en) | 1995-03-15 |
Family
ID=14250657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9956587A Expired - Fee Related JPH0723740B2 (en) | 1987-04-22 | 1987-04-22 | Brake friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723740B2 (en) |
-
1987
- 1987-04-22 JP JP9956587A patent/JPH0723740B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63266231A (en) | 1988-11-02 |
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