JPH0776574B2 - Wet friction material - Google Patents
Wet friction materialInfo
- Publication number
- JPH0776574B2 JPH0776574B2 JP13961388A JP13961388A JPH0776574B2 JP H0776574 B2 JPH0776574 B2 JP H0776574B2 JP 13961388 A JP13961388 A JP 13961388A JP 13961388 A JP13961388 A JP 13961388A JP H0776574 B2 JPH0776574 B2 JP H0776574B2
- Authority
- JP
- Japan
- Prior art keywords
- friction
- weight
- friction material
- resin
- wet friction
- 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 - Lifetime
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Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は油中で使用される摩擦材、特に低摩擦特性化さ
れたオートマチック・トランスミッション・フルード
（以下ATFという）に適した摩擦材に関するものであ
る。Description: TECHNICAL FIELD The present invention relates to a friction material used in oil, and more particularly to a friction material suitable for low friction characteristic automatic transmission fluid (hereinafter referred to as ATF). Is.
［従来の技術］ 内燃機関を原動機とする自動車などでは、原動機と変速
機との間にクラッチを設ける。このクラッチは発進時や
変速時などに必要なすべりを与えると共に、歯車変速機
の変速後の切換えに動力の断続を行う必要がある。これ
らの機能をはたすため、摩擦クラッチが広く採用されて
いる。[Prior Art] In a vehicle using an internal combustion engine as a prime mover, a clutch is provided between the prime mover and the transmission. It is necessary for this clutch to provide the necessary slip when starting or shifting, and also for connecting or disconnecting the power for shifting the gear transmission after shifting. Friction clutches are widely used to fulfill these functions.
摩擦クラッチには、乾燥状態で使用される乾式摩擦板
と、油中に浸して使用される湿式摩擦板とにわけられ
る。The friction clutch is divided into a dry friction plate used in a dry state and a wet friction plate immersed in oil for use.
湿式摩擦板に用いられる摩擦材は古くは焼結合金であっ
たが、最近は熱硬化性樹脂を含浸、硬化させた紙質基材
の摩擦材が主流である。この種の摩擦材は有機繊維、無
機繊維の繊維基材、および無機充填材と摩擦調整剤とを
湿式抄造し、フェノール樹脂などの熱硬化性樹脂を含浸
させ、乾燥、圧縮成形したものである。（例えば特開昭
57−85876号、特開昭59−175639号） ［発明が解決しようとする問題点］ 自動車等に装着されている自動変速機の構成要素を円滑
に作動させるためにATFは、動力伝達、変速制御、潤滑
作用および摩擦材の潤滑と適正な摩擦特性を維持させる
役割をはたしている。最近の車輌は、エンジンの高出力
化、４輪駆動車（以下4WDという）等の駆動方式の多様
化や省燃費対策のためのロックアップクラッチの装着な
どの設計条件が拡大し、ATFに対する要求特性も同様に
拡大されている。The friction material used for the wet friction plate has been a sintered alloy for a long time, but recently, a friction material having a paper base material impregnated with a thermosetting resin and cured is the mainstream. This type of friction material is obtained by wet-fabricating an organic fiber, a fiber base material of an inorganic fiber, an inorganic filler and a friction modifier, impregnating a thermosetting resin such as a phenol resin, drying and compression molding. . (For example,
57-85876, Japanese Patent Laid-Open No. 59-175639) [Problems to be solved by the invention] In order to smoothly operate the components of an automatic transmission mounted on an automobile or the like, the ATF is used for power transmission and gear shifting. It plays a role in control, lubrication and lubrication of friction materials and maintaining proper friction characteristics. In recent vehicles, design conditions such as higher output of engines, diversification of drive systems such as 4-wheel drive vehicles (hereinafter referred to as 4WD) and mounting of lock-up clutch for fuel saving measures are expanding, and ATF requirements The characteristics are expanded as well.
自動変速機の変速ショックフィーリング向上のため、AT
Fによる最終動摩擦係数／動摩擦係数の比（以下μo/μ
ｄ比という）の低減が進められている。このμo/μｄ比
と、静摩擦係数（以下μｓという）は比例関係にあり低
μo/μｄ比のATFを使用した場合、μｓも低下し、従来
の自動変速機では、静トルク容量不足となり、摩擦材に
すべりが生じ焼損の原因となるという問題点がある。AT to improve shift shock feeling of automatic transmission
Ratio of final dynamic friction coefficient / dynamic friction coefficient by F (hereinafter μo / μ
The d ratio) is being reduced. This μo / μd ratio is proportional to the coefficient of static friction (hereinafter referred to as μs), and when ATF with a low μo / μd ratio is used, μs also decreases, and the conventional automatic transmission suffers from insufficient static torque capacity and friction. There is a problem in that the material slips and causes burnout.
これらの対策として、摩擦板の枚数を増加させたり、摩
擦材の有効径を増加させたり、またはクラッチ制御油圧
を高める方法が考えられるが、自動変速機自体が大きく
なり、現状の自動変速機への適用は困難であり、他の解
決方法が望まれている。As a countermeasure for this, it is possible to increase the number of friction plates, increase the effective diameter of the friction material, or increase the clutch control hydraulic pressure, but the automatic transmission itself becomes larger and Is difficult to apply and other solutions are desired.
［問題点を解決するための手段］ 本発明の目的は、上記の問題点を解決し、変速フィーリ
ングに優れ、かつ始動時の静トルク伝達容量の大きな湿
式摩擦材を提供するものである。すなわち本発明の湿式
摩擦材は、繊維成分、熱硬化性樹脂および摩擦調整材か
らなる湿式摩擦材において、前記摩擦調整材がカシュー
樹脂とゴムとからなり、しかも該摩擦調整材は15〜75重
量％のゴム成分を含有し、未加硫の複合化充填材である
ことを特徴とする。[Means for Solving Problems] An object of the present invention is to solve the above problems, and to provide a wet friction material which is excellent in shift feeling and has a large static torque transmission capacity at the time of starting. That is, the wet friction material of the present invention is a wet friction material comprising a fiber component, a thermosetting resin and a friction adjusting material, wherein the friction adjusting material is made of cashew resin and rubber, and the friction adjusting material is 15 to 75 weight. % Rubber component and is an unvulcanized composite filler.
本発明の湿式摩擦材の骨格部分を構成する繊維成分は、
木材パルプ、リンターパルプ、芳香族ポリアミド繊維、
ノボロイド繊維などの有機繊維やガラス繊維、チタン酸
カリウム繊維、シリカ繊維、ロックウール繊維などの無
機繊維であり、これらの単独または２種以上を混合して
使用される。繊維成分の適正な配合量は、全摩擦材中の
40〜75重量％である。The fiber component constituting the skeleton portion of the wet friction material of the present invention,
Wood pulp, linter pulp, aromatic polyamide fiber,
Organic fibers such as novoloid fibers, inorganic fibers such as glass fibers, potassium titanate fibers, silica fibers, and rockwool fibers, which may be used alone or in admixture of two or more. The proper blending amount of fiber components is
40 to 75% by weight.
本発明の熱硬化性樹脂としては、フェノール樹脂、メラ
ミン樹脂、メラミン変性フェノール樹脂、フェノール変
性メラミン樹脂、オイル変性フェノール樹脂、エポキシ
樹脂、ポリエステル樹脂等の、硬化型の樹脂が用いられ
る。熱硬化性樹脂の適正な配合量は、全摩擦材中の20〜
40重量％である。As the thermosetting resin of the present invention, curable resins such as phenol resin, melamine resin, melamine-modified phenol resin, phenol-modified melamine resin, oil-modified phenol resin, epoxy resin and polyester resin are used. The proper blending amount of thermosetting resin is 20 ~ in all friction materials.
40% by weight.
本発明の摩擦調整材として用いる複合化充填材は、カシ
ュー樹脂と天然ゴムまたはNBR、SBR、CR等の合成ゴムと
を複合化したもので、例えば粉末状のゴムにキシレン、
トルエン、トリクロルエチレン等の溶剤を加えて液状と
し、これにカシュー樹脂の粉末を加えてよく混合した
後、溶剤を蒸発乾燥させ粉砕して複合化充填材を得る。
または、溶液状態にあるカシュー樹脂にゴム粉末を混合
させた後、固化粉砕して複合化充填材を得ることができ
る。複合化充填材の適正な配合量は、全摩擦材中の５〜
20重量％である。The composite filler used as the friction modifier of the present invention is a composite of cashew resin and natural rubber or synthetic rubber such as NBR, SBR, CR, for example, xylene in powdered rubber,
A solvent such as toluene and trichlorethylene is added to make a liquid, and the powder of cashew resin is added thereto and mixed well, and then the solvent is evaporated to dryness and pulverized to obtain a composite filler.
Alternatively, the compounded filler can be obtained by mixing rubber powder with the cashew resin in solution and then solidifying and pulverizing. The proper compounding amount of the composite filler is 5 to 5 in all the friction materials.
20% by weight.
本発明の湿式摩擦材には、上記の他にグラファイト粉
末、アルミニウム粉末、硫酸バリウム、炭酸カルシウ
ム、酸化鉄、珪藻土などの無機充填材を使用することが
できる。In addition to the above, an inorganic filler such as graphite powder, aluminum powder, barium sulfate, calcium carbonate, iron oxide and diatomaceous earth can be used in the wet friction material of the present invention.
本発明の湿式摩擦材を製造するには、繊維成分、複合化
充填材、必要に応じて無機充填材や定着剤を水中に分散
させたのち、抄造機で抄紙し、乾燥後所定の型に打抜
く。つぎに打抜かれた基材にフェノール樹脂を含浸さ
せ、乾燥後加熱加圧成形して湿式摩擦材が得られる。In order to produce the wet friction material of the present invention, a fiber component, a composite filler, and optionally an inorganic filler and a fixing agent are dispersed in water, paper-making is performed by a paper making machine, and a predetermined mold is formed after drying. Punch out. Next, the punched base material is impregnated with a phenol resin, dried and heated and pressed to obtain a wet friction material.
［発明の作用および効果］ 本発明の湿式摩擦材は、繊維成分、熱硬化性樹脂および
カシュー樹脂とゴムとの複合化充填材からなる摩擦調整
材を組成とすることにより、μo/μｄ比を低く抑えたま
ま、μｓを高めることができ、静トルク容量不足を改善
することができる。複合化充填材中のゴムの配合割合
は、15〜75重量％が好ましい。ゴムの配合割合が15重量
％未満の場合はμｓの増大効果が小さく、75重量％を超
えると湿式摩擦材の耐熱性が問題となる。[Operation and Effect of the Invention] The wet friction material of the present invention has a composition of a friction modifier composed of a fiber component, a thermosetting resin, and a composite filler of cashew resin and rubber. While keeping it low, μs can be increased and the static torque capacity shortage can be improved. The compounding ratio of rubber in the composite filler is preferably 15 to 75% by weight. If the rubber content is less than 15% by weight, the effect of increasing μs is small, and if it exceeds 75% by weight, the heat resistance of the wet friction material becomes a problem.
本発明の摩擦調整材として用いる複合化充填材は、カシ
ュー樹脂にゴムを複合化することにより、カシュー樹脂
のもつもろさが改善され、柔軟性とねばりのある複合化
充填材に改質され、湿式摩擦材のμo/μｄ比を低く抑え
たままμｓを高めることができる。The composite filler used as the friction modifier of the present invention is a composite filler of cashew resin, which improves the brittleness of cashew resin and is modified into a composite filler having flexibility and stickiness. It is possible to increase μs while keeping the μo / μd ratio of the friction material low.
本発明の湿式摩擦材は、低μo/μｄ比のATF中で用いる
ことにより、ATFの作用で変速ショックに大きな影響を
与えるμo/μｄ比を低く抑えたまま、μｓを増大させる
ことにより、変速フィーリングを向上させると同時に、
静トルク伝達容量が確保できるため、摩擦材のすべりを
防止し、耐久性に優れている。The wet friction material of the present invention is used in an ATF having a low μo / μd ratio, and by increasing μs while keeping the μo / μd ratio, which has a great effect on gear shift shock by the action of ATF, low, While improving the feeling,
Since the static torque transmission capacity can be secured, the friction material is prevented from slipping and has excellent durability.
［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］ リンターバルブ45重量％、ガラス繊維５重量％、アラミ
ンド繊維10重量％を水中に口水度480〜520mlになる様に
叩解したのち、NBRが20重量％とカシュー樹脂が80重量
％の配合割合の複合化充填剤を15重量％および珪藻土を
25重量％を順次仕込み、分散させ、硫酸バンドにより定
着させたのち、円網式抄造機により所定の秤量、厚さに
抄紙する。この抄紙した基材を所定のリングに打抜き、
フェノール樹脂を抄紙した基材100重量部に対して28重
量部をディッピング方法により含浸し、170℃×２分間
加熱加圧成形と同時に金属板からなるディスクプレート
に接着して湿式摩擦材を得た。[Example 1] 45% by weight of a linter bulb, 5% by weight of glass fiber, and 10% by weight of alaminated fiber were beaten in water so that the degree of mouthwater was 480 to 520 ml, then 20% by weight of NBR and 80% by weight of cashew resin. 15% by weight of composite filler and diatomaceous earth
25% by weight is sequentially charged, dispersed and fixed with a sulfuric acid band, and then paper is made to a predetermined weight and thickness by a cylinder type paper making machine. The paper-made base material is punched into a predetermined ring,
A wet friction material was obtained by impregnating 100 parts by weight of a phenolic resin-made base material with 28 parts by weight by a dipping method, and simultaneously adhering to a disk plate made of a metal plate at 170 ° C. for 2 minutes under heat and pressure molding. .
［実施例２］ NBRが20重量％とカシュー樹脂が80重量％の配合割合の
複合化充填材に代えて、NBRが40重量％とカシュー樹脂
が60重量％の配合割合の複合化充填材を用いた以外は実
施例１と同様にして湿式摩擦材を得た。[Example 2] Instead of a compounding filler having a compounding ratio of 20% by weight NBR and 80% by weight of cashew resin, a compounding filler having a compounding ratio of 40% by weight of NBR and 60% by weight of cashew resin was used. A wet friction material was obtained in the same manner as in Example 1 except that it was used.
［実施例３］ NBRが20重量％とカシュー樹脂が80重量％の配合割合の
複合化充填材に代えて、NBRが60重量％とカシュー樹脂
が40重量％の配合割合の複合化充填材を用いた以外は実
施例１と同様にして湿式摩擦材を得た。[Example 3] Instead of a compounding filler having a compounding ratio of 20% by weight of NBR and 80% by weight of cashew resin, a compounding filler having a compounding ratio of 60% by weight of NBR and 40% by weight of cashew resin was used. A wet friction material was obtained in the same manner as in Example 1 except that it was used.
［比較例］ NBRが20重量％とカシュー樹脂が80重量％の配合割合の
複合化充填材に代えて、カシュー樹脂単独を充填材とし
て用いた以外は実施例１と同様にして湿式摩擦材を得
た。[Comparative Example] A wet friction material was prepared in the same manner as in Example 1 except that the cashew resin alone was used as the filler instead of the compounded filler having the compounding ratio of 20 wt% NBR and 80 wt% cashew resin. Obtained.
つぎに、実施例１〜３、比較例で得られた湿式摩擦材を
SAE No.2テスターにより2000サイクルまでの摩擦試験を
実施した。Next, the wet friction materials obtained in Examples 1 to 3 and Comparative Example were used.
A friction test up to 2000 cycles was carried out using a SAE No. 2 tester.
試験条件は、イナーシャ;2.5kgcm sec2、 面圧;7.7kg/cm2、回転数Ｎ＝3600rpm ATF;トヨタオートフルードタイプＴ、 試験油温;120℃ である。The test conditions are inertia: 2.5 kgcm sec 2 , surface pressure: 7.7 kg / cm 2 , rotation speed N = 3600 rpm ATF; Toyota Autofluid type T, test oil temperature: 120 ° C.
試験結果を表１に示した。The test results are shown in Table 1.
表１の試験結果に示したように、本発明による実施例１
〜３の湿式摩擦材は、比較例の湿式摩擦材と同等の摩擦
係数比（1.07〜1.12）を保持しつつ、静摩擦係数は比較
例に比べ約10％増加していることがわかる。 As shown in the test results of Table 1, Example 1 according to the present invention
It can be seen that the wet friction materials of Nos. 3 to 3 maintain the same friction coefficient ratio (1.07 to 1.12) as the wet friction materials of the comparative example, while increasing the static friction coefficient by about 10% as compared with the comparative example.
Claims (1)
からなる湿式摩擦材において、該摩擦調整材がカシュー
樹脂とゴムとからなり、しかも該摩擦調整材は15〜75重
量％のゴム成分を含有し、未加硫の複合化充填材である
ことを特徴とする湿式摩擦材。1. A wet friction material comprising a fiber component, a thermosetting resin and a friction modifier, wherein the friction modifier comprises cashew resin and rubber, and the friction modifier comprises 15 to 75% by weight of a rubber component. A wet friction material containing an unvulcanized composite filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13961388A JPH0776574B2 (en) | 1988-06-07 | 1988-06-07 | Wet friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13961388A JPH0776574B2 (en) | 1988-06-07 | 1988-06-07 | Wet friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01307529A JPH01307529A (en) | 1989-12-12 |
| JPH0776574B2 true JPH0776574B2 (en) | 1995-08-16 |
Family
ID=15249370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13961388A Expired - Lifetime JPH0776574B2 (en) | 1988-06-07 | 1988-06-07 | Wet friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0776574B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614114A (en) * | 2013-08-14 | 2014-03-05 | 十堰市九霄摩擦材料有限公司 | Friction material for automobile brake and recycling method therefor |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8021744B2 (en) | 2004-06-18 | 2011-09-20 | Borgwarner Inc. | Fully fibrous structure friction material |
| US7429418B2 (en) | 2004-07-26 | 2008-09-30 | Borgwarner, Inc. | Porous friction material comprising nanoparticles of friction modifying material |
| JP5468252B2 (en) | 2005-04-26 | 2014-04-09 | ボーグワーナー インコーポレーテッド | Friction material |
| EP2071209A1 (en) * | 2007-12-12 | 2009-06-17 | HOERBIGER Antriebstechnik GmbH | Non-metallic friction lining |
| DE102008013907B4 (en) | 2008-03-12 | 2016-03-10 | Borgwarner Inc. | Frictionally-locking device with at least one friction plate |
-
1988
- 1988-06-07 JP JP13961388A patent/JPH0776574B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614114A (en) * | 2013-08-14 | 2014-03-05 | 十堰市九霄摩擦材料有限公司 | Friction material for automobile brake and recycling method therefor |
| CN103614114B (en) * | 2013-08-14 | 2015-07-22 | 十堰市九霄摩擦材料有限公司 | Friction material for automobile brake and recycling method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01307529A (en) | 1989-12-12 |
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