JP2001107027A - Friction material composition and friction material using this - Google Patents
Friction material composition and friction material using thisInfo
- Publication number
- JP2001107027A JP2001107027A JP28938599A JP28938599A JP2001107027A JP 2001107027 A JP2001107027 A JP 2001107027A JP 28938599 A JP28938599 A JP 28938599A JP 28938599 A JP28938599 A JP 28938599A JP 2001107027 A JP2001107027 A JP 2001107027A
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- Prior art keywords
- friction material
- material composition
- weight
- composition
- friction
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- Compositions Of Macromolecular Compounds (AREA)
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- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車、鉄道車
両、各種産業用機械等の制動に用いられるディスクブレ
ーキパッド、ブレーキライニング等の摩擦材に適した摩
擦材組成物及び摩擦材組成物を用いた摩擦材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction material composition suitable for a friction material such as a disc brake pad and a brake lining used for braking automobiles, railway vehicles, various industrial machines, and the like. Friction material.
【０００２】[0002]
【従来の技術】自動車、鉄道車両、各種産業用機械等に
は、その制動のためディスクブレーキパッド、ブレーキ
ライニング等の摩擦材が使用されている。現在使用され
ている摩擦材、例えばディスクブレーキパッドは、特開
平６−１８４５２５号公報などに示されるようにアラミ
ド繊維、鉱物繊維等の繊維状物質、カシューダスト、黒
鉛等の摩擦調整剤を用いて制動時の鳴きや異音の発生の
少ないNon・Asbestos・Organic（ノン・アスベストス・オ
ーガニック）（以下ＮＡＯ材と称する）系のディスクブ
レーキパッドが主流である。2. Description of the Related Art Friction materials such as disc brake pads and brake linings are used for braking automobiles, railway cars, various industrial machines and the like. A friction material currently used, for example, a disc brake pad, is prepared by using a fibrous substance such as aramid fiber and mineral fiber, a cashew dust, and a friction modifier such as graphite as shown in JP-A-6-184525. Disc brake pads based on Non-Asbestos-Organic (hereinafter referred to as NAO materials), which generate less noise and noise during braking, are mainly used.
【０００３】しかしながら、近年のブレーキへの性能要
求は益々多様化する傾向にあり、従来のＮＡＯ材に対し
て、ブレーキ鳴き、異音といった音振特性をさらに向上
しながら、効き特性、耐摩耗特性、ディスクロータ表面
とディスクブレーキパッド摩擦面間の発錆防止や相手材
（ディスクロータ）への錆固着（貼り付き）防止（以下
防錆とする）等の性能向上が要求されているが、上記に
示すような従来のディスクブレーキパッドでは、全ての
特性を十分に満足することが難しい状況である。However, the performance requirements for brakes in recent years have been diversifying, and the effectiveness and wear resistance of the conventional NAO materials have been improved while further improving the noise and vibration characteristics such as brake noise and abnormal noise. It is required to improve performance such as prevention of rust between the disk rotor surface and the friction surface of the disk brake pad and prevention of rust sticking (sticking) to a mating material (disk rotor) (hereinafter referred to as rust prevention). It is difficult to satisfy all the characteristics with the conventional disc brake pad as shown in FIG.
【０００４】[0004]
【発明が解決しようとする課題】請求項１又は２記載の
発明は、音振特性や効き特性、耐摩耗特性への悪影響が
少なく、防錆に優れる摩擦材に適した摩擦材組成物を提
供するものである。請求項３の発明は、音振特性や効き
特性、耐摩耗特性への悪影響が少なく、防錆に優れる摩
擦材を提供するものである。SUMMARY OF THE INVENTION The invention according to claim 1 or 2 provides a friction material composition suitable for a friction material excellent in rust prevention with little adverse effect on sound and vibration characteristics, effectiveness characteristics and wear resistance characteristics. Is what you do. The third aspect of the present invention is to provide a friction material which has little adverse effect on sound and vibration characteristics, effectiveness characteristics, and wear resistance characteristics and is excellent in rust prevention.
【０００５】[0005]
【課題を解決するための手段】本発明は、全組成物中に
アルカリ金属塩を０．２〜５重量％含有してなる摩擦材
組成物に関する。また、本発明は、アルカリ金属塩が、
炭酸ナトリウム塩又は炭酸カリウム塩である摩擦材組成
物に関する。さらに、本発明は、上記の摩擦材組成物を
加熱加圧成形してなる摩擦材に関する。SUMMARY OF THE INVENTION The present invention relates to a friction material composition comprising 0.2 to 5% by weight of an alkali metal salt in the whole composition. Further, the present invention provides an alkali metal salt,
The present invention relates to a friction material composition which is a sodium carbonate salt or a potassium carbonate salt. Further, the present invention relates to a friction material obtained by heating and pressing the above friction material composition.
【０００６】[0006]
【発明の実施の形態】本発明において、アルカリ金属塩
はpH調整剤として用いられるものであり、その含有量
は、全組成物中に０．２〜５重量％、好ましくは０．５
〜３重量％、さらに好ましくは１〜２重量％の範囲とさ
れ、０．２重量％未満であると防錆効果（発錆や錆固着
等の防止効果）が低下し、５重量％を超えると効き特性
（特に高温時と水濡れ時）が低下する。なおアルカリ金
属塩としては、炭酸ナトリウム塩又は炭酸カリウム塩を
用いることが好ましい。アルカリ金属塩を含有した摩擦
材組成物のpHは、発錆防止の点で９．５〜１２．５の範
囲であることが好ましく、１０〜１２の範囲であること
が好ましく、１０．５〜１１．５の範囲であることがさ
らに好ましい。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, an alkali metal salt is used as a pH adjuster, and its content is 0.2 to 5% by weight, preferably 0.5 to 5% by weight in the whole composition.
If it is less than 0.2% by weight, the rust-preventing effect (the effect of preventing rusting and rust fixation) decreases, and exceeds 5% by weight. The effect properties (especially at high temperatures and when wet with water) decrease. In addition, it is preferable to use a sodium carbonate salt or a potassium carbonate salt as the alkali metal salt. The pH of the friction material composition containing an alkali metal salt is preferably in the range of 9.5 to 12.5, more preferably in the range of 10 to 12, and preferably in the range of 10.5 to 1 in terms of preventing rusting. More preferably, it is in the range of 11.5.
【０００７】本発明における摩擦材組成物は、アルカリ
金属塩の他に繊維状物質、結合剤、摩擦調整剤、充填剤
等が用いられ、さらに必要に応じて銅、黄銅、亜鉛、青
銅等の金属粉が用いられる。なお繊維状物質としては、
スチール繊維、黄銅繊維、銅繊維、アラミド繊維、アク
リル繊維、カーボン繊維、セラミック繊維、ロックウー
ル、チタン酸カリウム繊維、炭酸カルシウムウィスカ、
炭酸マグネシウムウィスカ等が挙げられる。The friction material composition of the present invention uses a fibrous substance, a binder, a friction modifier, a filler, etc. in addition to the alkali metal salt, and further comprises copper, brass, zinc, bronze, etc., if necessary. Metal powder is used. In addition, as a fibrous substance,
Steel fiber, brass fiber, copper fiber, aramid fiber, acrylic fiber, carbon fiber, ceramic fiber, rock wool, potassium titanate fiber, calcium carbonate whisker,
And magnesium carbonate whiskers.
【０００８】結合剤としては、フェノール樹脂、メラミ
ン樹脂、エポキシ樹脂やこれらの各種変性樹脂、例えば
カシュー変性、ゴム変性等の熱硬化性樹脂、ＮＢＲ、Ｓ
ＢＲ、ＩＲ等のゴムなどが挙げられる。摩擦調整剤とし
ては、カシューダスト、三硫化アンチモン、二硫化モリ
ブデン、黒鉛、コークス等が挙げられる。充填剤として
は、硫酸バリウム、炭酸カルシウム、炭酸マグネシウ
ム、バーミキュライト、ゴム粉等が挙げられる。Examples of the binder include phenolic resins, melamine resins, epoxy resins and various modified resins thereof, for example, thermosetting resins such as cashew-modified and rubber-modified, NBR, S
Rubbers such as BR and IR are exemplified. Examples of the friction modifier include cashew dust, antimony trisulfide, molybdenum disulfide, graphite, coke, and the like. Examples of the filler include barium sulfate, calcium carbonate, magnesium carbonate, vermiculite, and rubber powder.
【０００９】上記における繊維状物質の含有量は、機械
強度などの点から、全組成物中に５〜４０重量％とする
ことが好ましく、１０〜３５重量％とすることがより好
ましく、１５〜３０重量％とすることがさらに好まし
い。結合剤の含有量は、成形性などの点から全組成物中
に３〜１５重量％とすることが好ましく、４〜１３重量
％とすることがより好ましく、５〜１１重量％とするこ
とがさらに好ましい。摩擦調整剤の含有量は、摩擦係数
とその安定性などの点から全組成物中に４〜３０重量％
とすることが好ましく、７〜２２重量％とすることがよ
り好ましく、１０〜２０重量％とすることがさらに好ま
しい。The content of the fibrous substance in the above composition is preferably 5 to 40% by weight, more preferably 10 to 35% by weight, and more preferably 15 to 35% by weight, based on the mechanical strength and the like. More preferably, it is 30% by weight. The content of the binder is preferably 3 to 15% by weight, more preferably 4 to 13% by weight, and more preferably 5 to 11% by weight in the whole composition from the viewpoint of moldability and the like. More preferred. The content of the friction modifier is 4 to 30% by weight in the total composition in view of the coefficient of friction and its stability.
Is preferably set to 7 to 22% by weight, more preferably 10 to 20% by weight.
【００１０】充填剤の含有量は、充填密度などの点から
全組成物中に２０〜６０重量％とすることが好ましく、
２５〜５０重量％とすることがより好ましく、３０〜４
６重量％とすることがさらに好ましい。さらに必要に応
じて添加する金属粉の含有量は、全組成物中に１〜８重
量％とすることが好ましく、２〜７重量％とすることが
より好ましく、３〜６重量％とすることがさらに好まし
い。これらの成分は全組成物が１００重量％になるよう
に配合される。The content of the filler is preferably 20 to 60% by weight in the whole composition from the viewpoint of the packing density and the like.
It is more preferably 25 to 50% by weight, and 30 to 4% by weight.
More preferably, it is 6% by weight. Further, the content of the metal powder added as necessary is preferably 1 to 8% by weight, more preferably 2 to 7% by weight, and more preferably 3 to 6% by weight in the whole composition. Is more preferred. These components are blended so that the total composition is 100% by weight.
【００１１】本発明になる摩擦材は、上記に示す摩擦材
組成物を均一に混合し、この混合物を予備成形し、次い
で金型内に裏金及び予備成形体を挿設した後、加熱加圧
成形法で成形し、その後加熱処理を行って得られる。な
お必要に応じて加熱処理後、さらに４００〜７００℃の
高温で成形体の表面を焼き付けても良い。成形する際の
加熱温度は１３０〜１７０℃が好ましく、１４０〜１６
０℃がさらに好ましい。圧力は３０〜７０MPaが好まし
く、４０〜６０MPaがさらに好ましい。加熱処理温度は
１５０〜３００℃が好ましく、１８０〜２５０℃がさら
に好ましい。The friction material according to the present invention is prepared by uniformly mixing the above-described friction material composition, preforming the mixture, inserting a backing metal and a preform into a mold, and then heating and pressing. It is obtained by molding by a molding method and then performing a heat treatment. If necessary, after the heat treatment, the surface of the molded body may be further baked at a high temperature of 400 to 700 ° C. The heating temperature at the time of molding is preferably 130 to 170 ° C, and 140 to 16 ° C.
0 ° C. is more preferred. The pressure is preferably from 30 to 70 MPa, more preferably from 40 to 60 MPa. The heat treatment temperature is preferably from 150 to 300 ° C, more preferably from 180 to 250 ° C.
【００１２】[0012]
【実施例】以下、本発明を実施例により説明する。The present invention will be described below with reference to examples.
【００１３】実施例１〜４、比較例１〜４ 表１及び表２に示す成分を配合し、混合機で均一に混合
して摩擦材組成物を得た。次いで摩擦材組成物を所定の
形状に予備成形した後、金型内に裏金と予備成形体を挿
設し、１４０±５℃及び５０MPaの条件で１０分間加熱
加圧成形し、さらに２５０℃で５時間加熱処理を行い、
冷却後研磨してディスクブレーキパッドを得た。Examples 1 to 4 and Comparative Examples 1 to 4 The components shown in Tables 1 and 2 were blended and uniformly mixed by a mixer to obtain a friction material composition. Next, after preforming the friction material composition into a predetermined shape, the back metal and the preformed body are inserted into a mold, and heated and pressed at 140 ± 5 ° C. and 50 MPa for 10 minutes, and further heated at 250 ° C. Perform heat treatment for 5 hours,
After cooling, polishing was performed to obtain a disc brake pad.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】次に本発明の実施例になる摩擦材組成物を
用いたディスクブレーキパッドと比較例の摩擦材組成物
を用いたディスクブレーキパッドについて、防錆、効き
（摩擦係数）及びブレーキ鳴きの比較試験を行った。そ
の結果を表３に示す。なお試験条件は次の通りである。 防錆 ＪＩＳ Ｄ ４４１４に従って錆固着試験を行い、発錆
面積と錆固着力を比較した。 効き ＪＡＳＯ Ｃ４０２に従ってダイナモ試験を行い、摩擦
係数を比較した。 鳴き ＪＡＳＯ Ｃ４０２に従って実車試験を行い、試験中の
鳴きを測定し、７５ｄＢ以上の鳴きの発生率を求めた。
なお、上記の試験は全て本田技研工業(株)製、車種名：
シビック（１３インチサイズ）のブレーキユニットを用
いて行った。Next, with respect to the disc brake pad using the friction material composition according to the embodiment of the present invention and the disc brake pad using the friction material composition of the comparative example, rust prevention, effectiveness (friction coefficient) and brake squeal were measured. A comparative test was performed. Table 3 shows the results. The test conditions are as follows. Rust prevention A rust fixing test was performed according to JIS D 4414, and the rust generation area and the rust fixing force were compared. Efficacy A dynamo test was performed according to JASO C402 and the friction coefficients were compared. Squeal An actual vehicle test was conducted in accordance with JASO C402, and the squeal during the test was measured, and the occurrence rate of squeal of 75 dB or more was determined.
All the above tests were made by Honda Motor Co., Ltd.
The test was performed using a Civic (13-inch size) brake unit.
【００１７】[0017]
【表３】 [Table 3]
【００１８】表３に示されるように、本発明の実施例に
なる摩擦材組成物を用いたディスクブレーキパッドは、
防錆性能に特に優れ、効きと鳴きへの影響が小さいこと
が明らかである。これに対し比較例１、３及び４の摩擦
材組成物を用いたディスクブレーキパッドは、防錆効果
が不十分であり、また比較例３及び４の摩擦材組成物を
用いたディスクブレーキパッドは、ブレーキ鳴きが発生
し、さらに比較例２の摩擦材組成物を用いたディスクブ
レーキパッドは、第２回効力試験における摩擦係数とウ
ォーターフェード試験における摩擦係数の両方が低いこ
とが明らかである。As shown in Table 3, the disc brake pad using the friction material composition according to the embodiment of the present invention is:
It is clear that the rust prevention performance is particularly excellent and the effect on the effectiveness and squeal is small. On the other hand, the disc brake pads using the friction material compositions of Comparative Examples 1, 3 and 4 have an insufficient rust-preventing effect, and the disc brake pads using the friction material compositions of Comparative Examples 3 and 4 are It is clear that brake squealing occurs and that the disc brake pad using the friction material composition of Comparative Example 2 has a low coefficient of friction both in the second efficacy test and in the water fade test.
【００１９】[0019]
【発明の効果】請求項１又は２における摩擦材組成物
は、音振特性や効き特性、耐摩耗特性への悪影響が少な
く、防錆に優れる摩擦材を提供することができる。請求
項３における摩擦材は、音振特性や効き特性、耐摩耗特
性への悪影響が少なく、防錆に優れ、工業的に極めて好
適である。The friction material composition according to claim 1 or 2 can provide a friction material excellent in rust prevention with little adverse effect on sound and vibration characteristics, effectiveness characteristics and wear resistance characteristics. The friction material according to claim 3 has little adverse effect on sound vibration characteristics, effectiveness characteristics, and wear resistance characteristics, is excellent in rust prevention, and is industrially extremely suitable.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ１６Ｄ 69/02 Ｆ１６Ｄ 69/02 Ｆ Ｆターム(参考） 3J058 BA28 FA01 FA11 FA21 GA07 GA20 GA28 GA33 GA34 GA37 GA45 GA55 GA65 GA92 GA95 4F071 AA41 AA56 AB07 AB18 AB21 AB24 AB26 AD01 AE12 AE17 AE22 AH07 DA01 DA04 DA13 DA21 4J002 AC143 BG002 CC031 CC181 CD001 CL062 DA017 DA028 DA077 DC007 DE187 DE226 DE239 DG028 DG049 DJ027 DM007 FA042 FA047 FD013 FD019 FD206 FD208 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) F16D 69/02 F16D 69/02 FFterm (Reference) 3J058 BA28 FA01 FA11 FA21 GA07 GA20 GA28 GA33 GA34 GA37 GA45 GA55 GA65 GA92 GA95 4F071 AA41 AA56 AB07 AB18 AB21 AB24 AB26 AD01 AE12 AE17 AE22 AH07 DA01 DA04 DA13 DA21 4J002 AC143 BG002 CC031 CC181 CD001 CL062 DA017 DA028 DA077 DC007 DE187 DE226 DE239 DG028 DG049 DJ027 DM007 FA04
Claims (3)
５重量％含有してなる摩擦材組成物。1. An alkali metal salt in the total composition of 0.2 to
A friction material composition containing 5% by weight.
は炭酸カリウム塩である請求項１記載の摩擦材組成物。2. The friction material composition according to claim 1, wherein the alkali metal salt is a sodium carbonate salt or a potassium carbonate salt.
熱加圧成形してなる摩擦材。3. A friction material formed by heating and pressing the friction material composition according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28938599A JP2001107027A (en) | 1999-10-12 | 1999-10-12 | Friction material composition and friction material using this |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28938599A JP2001107027A (en) | 1999-10-12 | 1999-10-12 | Friction material composition and friction material using this |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001107027A true JP2001107027A (en) | 2001-04-17 |
Family
ID=17742544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28938599A Pending JP2001107027A (en) | 1999-10-12 | 1999-10-12 | Friction material composition and friction material using this |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001107027A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014007130A1 (en) | 2012-07-04 | 2014-01-09 | 日清紡ブレーキ株式会社 | Friction material |
| JP2014025014A (en) * | 2012-07-28 | 2014-02-06 | Nisshinbo Brake Inc | Friction material |
| JP2016135830A (en) * | 2015-01-23 | 2016-07-28 | 曙ブレーキ工業株式会社 | Friction material |
| US20180031067A1 (en) * | 2015-02-06 | 2018-02-01 | Japan Brake Industrial Co., Ltd. | Friction material and friction member |
| US20180045262A1 (en) * | 2015-01-29 | 2018-02-15 | Japan Brake Industrial Co., Ltd. | Friction material composition, and friction material and friction member using friction material composition |
| US10233988B2 (en) | 2015-09-23 | 2019-03-19 | Akebono Brake Industry Co., Ltd | Friction material |
| US11448277B2 (en) | 2015-07-22 | 2022-09-20 | Nisshinbo Brake, Inc. | Friction material |
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| JPS58121325A (en) * | 1982-01-14 | 1983-07-19 | Hitachi Chem Co Ltd | Clutch facing having improved rust preventive property |
| JPS6036582A (en) * | 1983-08-10 | 1985-02-25 | Nisshinbo Ind Inc | Friction material |
| JPH0288678A (en) * | 1988-09-27 | 1990-03-28 | Nippon Valqua Ind Ltd | Friction material |
| JPH0354298A (en) * | 1989-05-23 | 1991-03-08 | Dow Corning Gmbh | Alkali phosphate as anticorrosive for friction lining or for solid lubricant composition in friction lining |
| JPH07109362A (en) * | 1993-10-14 | 1995-04-25 | Aisin Chem Co Ltd | Friction member |
| JP2000205318A (en) * | 1999-01-12 | 2000-07-25 | Akebono Brake Ind Co Ltd | Friction material for brake |
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| WO2014007130A1 (en) | 2012-07-04 | 2014-01-09 | 日清紡ブレーキ株式会社 | Friction material |
| JP2014025014A (en) * | 2012-07-28 | 2014-02-06 | Nisshinbo Brake Inc | Friction material |
| JP2016135830A (en) * | 2015-01-23 | 2016-07-28 | 曙ブレーキ工業株式会社 | Friction material |
| WO2016117677A1 (en) * | 2015-01-23 | 2016-07-28 | 曙ブレーキ工業株式会社 | Friction material |
| US20180045262A1 (en) * | 2015-01-29 | 2018-02-15 | Japan Brake Industrial Co., Ltd. | Friction material composition, and friction material and friction member using friction material composition |
| US10677305B2 (en) | 2015-01-29 | 2020-06-09 | Japan Brake Industrial Co., Ltd. | Friction material composition, and friction material and friction member using friction material composition |
| US20180031067A1 (en) * | 2015-02-06 | 2018-02-01 | Japan Brake Industrial Co., Ltd. | Friction material and friction member |
| US11448277B2 (en) | 2015-07-22 | 2022-09-20 | Nisshinbo Brake, Inc. | Friction material |
| US10233988B2 (en) | 2015-09-23 | 2019-03-19 | Akebono Brake Industry Co., Ltd | Friction material |
| US10690207B2 (en) | 2015-09-23 | 2020-06-23 | Akebono Brake Industry Co., Ltd | Friction material |
| US11092205B2 (en) | 2015-09-23 | 2021-08-17 | Akebono Brake Industry Co., Ltd. | Friction material |
| US11879513B2 (en) | 2015-09-23 | 2024-01-23 | Akebono Brake Industry Co., Ltd. | Friction material |
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