JPH0711237A - Preliminary composition for frictional material and frictional material composition - Google Patents
Preliminary composition for frictional material and frictional material compositionInfo
- Publication number
- JPH0711237A JPH0711237A JP5152079A JP15207993A JPH0711237A JP H0711237 A JPH0711237 A JP H0711237A JP 5152079 A JP5152079 A JP 5152079A JP 15207993 A JP15207993 A JP 15207993A JP H0711237 A JPH0711237 A JP H0711237A
- Authority
- JP
- Japan
- Prior art keywords
- composition
- friction material
- friction
- fibers
- resin
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、摩擦材組成物に関する
ものであり、特に自動車、鉄道車両及び各種産業機械用
のブレーキ（ディスクブレーキパッド、ブレーキライニ
ング等）やクラッチフェーシング材として有用な摩擦材
組成物に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction material composition, particularly a friction material useful as a brake (disc brake pad, brake lining, etc.) and a clutch facing material for automobiles, railway vehicles and various industrial machines. It relates to a composition.
【０００２】[0002]
【従来の技術】自動車、鉄道車両及び各種産業機械に
は、その制動のために摩擦材が使用されている。この摩
擦材としては、従来、アスベストの代替繊維としてスチ
ール繊維を主構成繊維としたセミメタリック系摩擦材が
主流であった。しかし、近年の自動車産業界における軽
量化、高級化の動きと共にスチール繊維の代替繊維とし
てアラミド繊維、セラミック繊維などを使用したノンス
チール摩擦材への移行が急速に進んでいる。2. Description of the Related Art Friction materials are used for braking automobiles, railway vehicles and various industrial machines. Conventionally, as the friction material, a semi-metallic friction material having steel fibers as a main constituent fiber as a substitute fiber for asbestos has been mainly used. However, in recent years, along with the trend of weight reduction and upsizing in the automobile industry, the shift to non-steel friction materials using aramid fiber, ceramic fiber or the like as a substitute fiber of steel fiber is rapidly progressing.
【０００３】しかしながら、従来の摩擦材を用いた場合
には、摩擦材の制動に伴ってノイズ（７０ｄＢ以上の音
圧）の発生があった。これを防止するために、結合剤と
してゴム変性樹脂を配合したり、あるいは粉末ゴムを配
合することにより、摩擦材に柔軟性を付与する手段が採
られている。しかし、従来の技術では、結合剤そのもの
に柔軟性を付与することができたが、摩擦材の制動に伴
うノイズの発生を充分に防止することはできなかった。However, when the conventional friction material is used, noise (sound pressure of 70 dB or more) is generated due to braking of the friction material. In order to prevent this, means for imparting flexibility to the friction material is adopted by blending a rubber-modified resin as a binder or blending a powder rubber. However, in the conventional technique, the binder itself can be provided with flexibility, but it has not been possible to sufficiently prevent generation of noise due to braking of the friction material.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、前記従来技
術の問題点を解消し、各配合成分の混合、分散性が向上
しており、かつ制動に伴うノイズの発生を防止しうる摩
擦材用予備組成物及び摩擦材組成物を提供することを目
的とする。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, improves the mixing and dispersibility of each compounding component, and can prevent generation of noise due to braking. The purpose of the present invention is to provide a preliminary composition for use and a friction material composition.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、金属繊
維、摩擦調整剤及び充填剤からなる摩擦材基材を粘着性
を有する液状樹脂又は液状ゴムと混合し、基材表面を被
覆してから結合剤と混合することによって上記の課題を
解決しうることを見出した。本発明は、このような知見
に基づいて完成したものである。The present inventors mixed a friction material base material composed of metal fibers, a friction modifier and a filler with a liquid resin or liquid rubber having adhesiveness to coat the surface of the base material. It has been found that the above problems can be solved by mixing with a binder afterwards. The present invention has been completed based on such findings.
【０００６】すなわち、本発明は、金属繊維及び摩擦調
整剤を含有する摩擦材基材に、１〜１５容量％の液状樹
脂又は液状ゴムを混合してなる摩擦材用予備組成物に関
するものである。また、本発明は、無機繊維、有機繊維
及び結合剤と共に、上記の摩擦材用予備組成物を含有す
ることを特徴とする摩擦材組成物に関するものである。That is, the present invention relates to a preliminary composition for a friction material, which is obtained by mixing a friction material base material containing metal fibers and a friction modifier with 1 to 15% by volume of a liquid resin or liquid rubber. . The present invention also relates to a friction material composition characterized by containing the above-mentioned preliminary composition for friction materials together with inorganic fibers, organic fibers and a binder.
【０００７】摩擦材組成物は、通常、各種繊維、摩擦調
整剤、結合剤及び必要に応じて添加される各種添加剤を
含有するものであるが、本発明においては、まず、金属
繊維及び摩擦調整剤を含有する摩擦材基材に、１〜１５
容量％の液状樹脂又は液状ゴムを混合してなる摩擦材用
予備組成物を作製しておく。ここで、金属繊維として
は、例えば、銅、黄銅等の非鉄系金属繊維が挙げられ
る。The friction material composition usually contains various fibers, a friction modifier, a binder and various additives which are optionally added. In the present invention, first, the metal fibers and the friction are added. Friction material base material containing a modifier, 1 to 15
A preliminary composition for a friction material prepared by mixing a liquid resin or liquid rubber in a volume% is prepared. Here, examples of the metal fibers include non-ferrous metal fibers such as copper and brass.
【０００８】また、摩擦調整剤としては、特に制限はな
く、各種のものを使用することができ、例えば、炭酸カ
ルシウム、炭酸マグネシウム、硫酸バリウム、クレー、
タルク、黒鉛、アルミナ、マイカ、螢石、ジルコニア、
ヘマタイト、シリカ、硫化アンチモン、硫化鉄、硫化モ
リブデン等の無機物の粉末、鉄、鉛、銅等の金属の粉
末、カシューダスト、ゴムダスト、各種樹脂硬化物の粉
末等の有機物の粉末が挙げられる。これらのうち１種又
は２種以上を用いることができる。The friction modifier is not particularly limited and various ones can be used, for example, calcium carbonate, magnesium carbonate, barium sulfate, clay,
Talc, graphite, alumina, mica, fluorite, zirconia,
Inorganic powders such as hematite, silica, antimony sulfide, iron sulfide, molybdenum sulfide and the like, metal powders such as iron, lead and copper, cashew dust, rubber dust, powders of various resin cured products and the like can be mentioned. One or more of these can be used.
【０００９】また、本発明において、上記の摩擦材基材
に混合する液状樹脂又は液状ゴムとしては、常温での溶
融粘度が５００〜１０００ポイズであるものが好適であ
るが、これより粘度が高くて混合しにくい場合には、適
当な溶剤で希釈して使用することもできる。使用しうる
液状樹脂としては、具体的にはカシュー樹脂などが挙げ
られ、液状ゴムとしては、例えばＳＢＲなどが挙げられ
る。これらの液状樹脂又は液状ゴムは、摩擦材用予備組
成物中に１〜１５容量％含有されることが必要である。
液状樹脂又は液状ゴムの配合量が１容量％未満である
と、目的とする効果が得られず、１５容量％を超える
と、混合時に塊が生じ易くなり、均質な組成物が得られ
ない。In the present invention, the liquid resin or liquid rubber mixed with the friction material base material preferably has a melt viscosity of 500 to 1000 poises at room temperature, but the viscosity is higher than this. When it is difficult to mix them by mixing, they can be used after diluting with an appropriate solvent. As the liquid resin that can be used, specifically, cashew resin and the like can be mentioned, and as the liquid rubber, for example, SBR and the like can be mentioned. These liquid resins or liquid rubbers must be contained in the preliminary composition for friction material in an amount of 1 to 15% by volume.
If the content of the liquid resin or liquid rubber is less than 1% by volume, the intended effect cannot be obtained, and if it exceeds 15% by volume, lumps are likely to be formed during mixing, and a homogeneous composition cannot be obtained.
【００１０】こうして作製した摩擦材用予備組成物に無
機繊維、有機繊維及び結合剤を混合することによって本
発明の摩擦材組成物を得ることができる。ここで、摩擦
材用予備組成物は、摩擦材組成物中に３０〜６０容量％
含有されることが好ましい。この予備組成物の量が３０
容量％未満であると、目標とする摩擦係数を安定して得
ることができず、６０容量％を超えると、全容量に対す
る結合剤及び繊維の割合が少なくなり、強度が低下す
る。The friction material composition of the present invention can be obtained by mixing the thus-prepared preliminary composition for friction material with inorganic fibers, organic fibers and a binder. Here, the preliminary composition for the friction material is 30 to 60% by volume in the friction material composition.
It is preferably contained. The amount of this preliminary composition is 30
If it is less than volume%, the target coefficient of friction cannot be stably obtained, and if it exceeds 60 volume%, the ratio of the binder and the fiber to the total volume is small and the strength is lowered.
【００１１】また、無機繊維としては、例えば、セラミ
ック繊維、ガラス繊維、炭素繊維、ウォラスナイト、人
工鉱物質繊維、チタン酸カリ繊維などが挙げられ、有機
繊維としては、例えば、ポリイミド繊維、ポリアミド繊
維、アラミド繊維などが挙げられる。The inorganic fibers include, for example, ceramic fibers, glass fibers, carbon fibers, wollastonite, artificial mineral fibers, potassium titanate fibers and the like, and the organic fibers include, for example, polyimide fibers and polyamide fibers. , Aramid fiber and the like.
【００１２】本発明の摩擦材組成物において、結合剤と
しては、特に制限はなく、各種の熱硬化性樹脂組成物及
び／又はゴムラテックスを使用することができる。熱硬
化性樹脂組成物としては、フェノール樹脂、メラミン樹
脂、尿素樹脂、ポリアミドイミド樹脂、ポリイミド樹
脂、エポキシ樹脂等の樹脂組成物が挙げられ、これらの
うちフェノール樹脂組成物、メチル化メラミン樹脂組成
物が好ましい。樹脂組成物の量は、繊維基材と摩擦調整
材に対する結合力並びに摩擦材の摩擦係数及び摩擦率の
調整の点で一般に、摩擦材にしたときに固形分として摩
擦材に対して１０〜５０重量％含有させるような量が好
ましい。また、ゴムラテックスとしては、架橋性ゴムラ
テックスが用いられ、例えば、ニトリルブタジエンゴ
ム、アクリルゴム、天然ゴム、クロロプレンゴムなどが
挙げられる。In the friction material composition of the present invention, the binder is not particularly limited, and various thermosetting resin compositions and / or rubber latex can be used. Examples of the thermosetting resin composition include phenol resin, melamine resin, urea resin, polyamideimide resin, polyimide resin, epoxy resin and other resin compositions, among which phenol resin composition, methylated melamine resin composition. Is preferred. The amount of the resin composition is generally 10 to 50 relative to the friction material as a solid content when the friction material is used, in terms of the binding force to the fiber base material and the friction adjusting material and the adjustment of the friction coefficient and the friction coefficient of the friction material. The amount is preferably such that it is contained by weight. As the rubber latex, a crosslinkable rubber latex is used, and examples thereof include nitrile butadiene rubber, acrylic rubber, natural rubber, and chloroprene rubber.
【００１３】なお、本発明において、無機繊維及び有機
繊維は、摩擦材用予備組成物を得た後、該摩擦材用予備
組成物を乾燥させたものに配合することが必要とされ、
金属繊維、摩擦調整剤及び液状樹脂又は液状ゴムと同時
に混合すると、無機繊維及び有機繊維は、液状樹脂又は
液状ゴムに含まれる溶剤などで分散性が著しく低下し、
均質な組成の摩擦材が得られない。In the present invention, it is necessary that the inorganic fiber and the organic fiber are blended with the dried preliminary material for the friction material after the preliminary composition for the friction material is obtained.
When mixed at the same time with the metal fibers, the friction modifier and the liquid resin or liquid rubber, the inorganic fibers and the organic fibers have a significantly reduced dispersibility due to the solvent contained in the liquid resin or liquid rubber,
A friction material having a homogeneous composition cannot be obtained.
【００１４】本発明の摩擦材組成物は、上記成分の他
に、必要に応じて各種の添加剤、例えば、増量剤、分散
剤、増粘剤、可撓化剤、界面活性剤などを含有していて
もよい。The friction material composition of the present invention contains, in addition to the above components, various additives such as a filler, a dispersant, a thickener, a flexibilizer, and a surfactant, if necessary. You may have.
【００１５】[0015]
【作用】金属繊維及び摩擦調整剤を含有する摩擦材基材
に、１〜１５容量％の液状樹脂又は液状ゴムを混合して
基材の表面を液状樹脂又は液状ゴムで被覆することによ
り、その後に結合剤と混合したときに、結合剤と基材と
の表面に有機物の被膜が形成され、摩擦材に柔軟性が付
与される。この被膜の柔軟性により、摩擦によって生じ
た振動を吸収、緩和し、ノイズの発生を抑制する。ま
た、液状樹脂又は液状ゴムにより、摩擦材基材の表面に
粘着性が生じ、脱落による材料の分離が防止される。そ
の結果、組成に偏りのない摩擦材組成物が得られる。The friction material base material containing the metal fibers and the friction modifier is mixed with 1 to 15% by volume of the liquid resin or liquid rubber to coat the surface of the base material with the liquid resin or liquid rubber. When mixed with the binder, an organic film is formed on the surfaces of the binder and the base material, and flexibility is imparted to the friction material. The flexibility of this coating absorbs and alleviates vibrations caused by friction and suppresses the generation of noise. Further, the liquid resin or the liquid rubber makes the surface of the friction material base material sticky and prevents the material from being separated due to falling off. As a result, a friction material composition having a uniform composition can be obtained.
【００１６】[0016]
【実施例】次に、本発明を実施例によりさらに具体的に
説明するが、本発明はこれによって制限されるものでは
ない。EXAMPLES Next, the present invention will be described in more detail by way of examples, but the present invention is not limited thereto.
【００１７】実施例１ 表１に示す成分を配合し、混合機で均一に混合して摩擦
材用予備組成物を調製し、これを８０℃で６０分乾燥後
さらに表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。Example 1 The components shown in Table 1 were blended and uniformly mixed with a mixer to prepare a preliminary composition for friction material, which was dried at 80 ° C. for 60 minutes, and then the components shown in Table 2 were blended. Then, the mixture was uniformly mixed with a mixer to obtain a friction material composition.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【表２】 [Table 2]
【００２０】得られた摩擦材組成物は、材料の脱落によ
る分離はなく、均質な組成物であった。また、この摩擦
材組成物を用いて１４０℃、圧力４０ＭＰａの条件で１
０分間熱圧成形し、さらに２００℃で５時間熱処理して
ディスクブレーキパッドを製造し、実車試験（ＪＡＳＯ
Ｃ４０２−７９）を行った結果、７０ｄＢ以上の音圧
（ノイズ）発生率は０％で最大が６８ｄＢであり、良好
な結果が得られた。The obtained friction material composition was a homogeneous composition with no separation due to the material falling off. Further, using this friction material composition, 1
Thermo-press molding for 0 minutes and heat treatment at 200 ° C for 5 hours to manufacture disc brake pads.
As a result of performing C402-79), the sound pressure (noise) generation rate of 70 dB or more was 0% and the maximum was 68 dB, which was a good result.
【００２１】比較例１ 表３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。なお各原料は実施例１と同じものを用
いた。Comparative Example 1 The components shown in Table 3 were blended and uniformly mixed with a mixer to obtain a friction material composition. The same raw materials as in Example 1 were used.
【００２２】[0022]
【表３】 [Table 3]
【００２３】得られた摩擦材組成物は、材料の脱落、分
離が激しく、均質な組成物にはならなかった。この摩擦
材組成物を用いて実施例１と同様の工程を経てディスク
ブレーキパッドを製造し、実施例１と同様の実車試験を
行った結果、７０ｄＢ以上の音圧（ノイズ）の発生率は
１０％で最大が８５ｄＢと不満足な結果であった。The resulting friction material composition did not become a homogenous composition because the materials dropped off and separated significantly. A disc brake pad was manufactured using this friction material composition through the same steps as in Example 1, and the same actual vehicle test as in Example 1 was performed. As a result, the occurrence rate of sound pressure (noise) of 70 dB or more was 10%. %, The maximum was 85 dB, which was an unsatisfactory result.
【００２４】[0024]
【発明の効果】本発明による摩擦材用予備組成物は、摩
擦材基材の表面に粘着性を有する液状樹脂又は液状ゴム
の被膜を有し、摩擦材組成物を調製する際に結合剤との
界面に有機物の被膜を形成し、柔軟性を付与する。本発
明による摩擦材組成物は、摩擦材基材と結合剤との界面
に形成された被膜の柔軟性により、摩擦によって生じた
振動を吸収、緩和し、ノイズの発生を抑制する。また、
本発明による摩擦材組成物は、混合された粘着性の液状
樹脂又は液状ゴムにより、脱落による材料の分離が防止
され、成分の分散性が良好で、組成に偏りのない均質な
組成物である。本発明の摩擦材組成物を用いて製造され
た摩擦材は、制動に伴うノイズの発生（７０ｄＢ以上の
音圧の発生）が極めて低い。The preliminary composition for a friction material according to the present invention has a coating of a liquid resin or liquid rubber having an adhesive property on the surface of the friction material base material, and is used as a binder when preparing the friction material composition. An organic film is formed on the interface of to give flexibility. The friction material composition according to the present invention absorbs and alleviates vibration caused by friction due to the flexibility of the coating film formed at the interface between the friction material base material and the binder, and suppresses the generation of noise. Also,
The friction material composition according to the present invention is a homogeneous composition in which the mixed viscous liquid resin or liquid rubber prevents separation of the material due to falling off, good dispersibility of the components, and a uniform composition. . The friction material produced by using the friction material composition of the present invention has extremely low noise (occurrence of sound pressure of 70 dB or more) due to braking.
Claims (4)
材基材に、１〜１５容量％の液状樹脂又は液状ゴムを混
合してなる摩擦材用予備組成物。1. A preliminary composition for a friction material, which is obtained by mixing a friction material base material containing a metal fiber and a friction modifier with 1 to 15% by volume of a liquid resin or liquid rubber.
で５００〜１０００ポイズである請求項１記載の摩擦材
用予備組成物。2. The preliminary composition for a friction material according to claim 1, wherein the liquid resin or liquid rubber has a melt viscosity of 500 to 1000 poise at room temperature.
請求項１記載の摩擦材用予備組成物を含有することを特
徴とする摩擦材組成物。3. With inorganic fibers, organic fibers and a binder,
A friction material composition comprising the preliminary composition for a friction material according to claim 1.
含有する請求項３記載の摩擦材組成物。4. A preliminary composition for a friction material comprising 30 to 60% by volume.
The friction material composition according to claim 3, which contains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5152079A JPH0711237A (en) | 1993-06-23 | 1993-06-23 | Preliminary composition for frictional material and frictional material composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5152079A JPH0711237A (en) | 1993-06-23 | 1993-06-23 | Preliminary composition for frictional material and frictional material composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0711237A true JPH0711237A (en) | 1995-01-13 |
Family
ID=15532597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5152079A Pending JPH0711237A (en) | 1993-06-23 | 1993-06-23 | Preliminary composition for frictional material and frictional material composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0711237A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009132783A (en) * | 2007-11-29 | 2009-06-18 | Akebono Brake Ind Co Ltd | Composite friction adjusting material for friction material |
| US20100096238A1 (en) * | 2007-06-28 | 2010-04-22 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Impregnating method for the production of wound coupling coatings |
| CN109372919A (en) * | 2018-12-03 | 2019-02-22 | 宁波凯硕汽车部件有限公司 | A kind of high performance brake piece and its production technology |
-
1993
- 1993-06-23 JP JP5152079A patent/JPH0711237A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100096238A1 (en) * | 2007-06-28 | 2010-04-22 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Impregnating method for the production of wound coupling coatings |
| US8790772B2 (en) * | 2007-06-28 | 2014-07-29 | Schaeffler Technologies AG & Co. KG | Impregnating method for the production of wound coupling coatings |
| JP2009132783A (en) * | 2007-11-29 | 2009-06-18 | Akebono Brake Ind Co Ltd | Composite friction adjusting material for friction material |
| CN109372919A (en) * | 2018-12-03 | 2019-02-22 | 宁波凯硕汽车部件有限公司 | A kind of high performance brake piece and its production technology |
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