JP2002179811A - Carbonaceous wet friction material - Google Patents
Carbonaceous wet friction materialInfo
- Publication number
- JP2002179811A JP2002179811A JP2000374054A JP2000374054A JP2002179811A JP 2002179811 A JP2002179811 A JP 2002179811A JP 2000374054 A JP2000374054 A JP 2000374054A JP 2000374054 A JP2000374054 A JP 2000374054A JP 2002179811 A JP2002179811 A JP 2002179811A
- Authority
- JP
- Japan
- Prior art keywords
- friction material
- carbon fiber
- rubber
- carbonaceous
- thermosetting 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]
【発明が属する技術分野】本発明は、相対する摩擦面間
に潤滑油などの油液が介在する状態で使用される例え
ば、ブレーキライニング、クラッチフェーシングや差動
制限装置（ＬＳＤ）用フェーシングなどに好適に使用さ
れる炭素質湿式摩擦材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a brake lining, a clutch facing, and a facing for a differential limiting device (LSD) used in a state in which an oil liquid such as lubricating oil is interposed between opposing friction surfaces. The present invention relates to a preferably used carbonaceous wet friction material.
【０００２】[0002]
【従来の技術】炭素質湿式摩擦材としては、炭素繊維基
材を樹脂結合材または炭素結合材で結合した複合組織の
材料が開発されており、例えば、下記の技術などが提案
されている。2. Description of the Related Art As a carbonaceous wet friction material, a material having a composite structure in which a carbon fiber base material is bonded with a resin binder or a carbon binder has been developed. For example, the following techniques have been proposed.
【０００３】１つの支持材料、および、有機樹脂バイン
ダーを含浸した炭素繊維ウエブを含む１つの摩擦層、か
ら成る、可動部分間の力の伝達用油中運転用摩擦要素
（特開昭50−72050 号公報）、炭素繊維のような繊維状
物質および結合剤を含む組成物を加圧加熱成形後、３５
０〜１０００℃で非酸化性雰囲気中で加熱する摩擦材の
製造法（特開昭62−21528 号公報）、炭素繊維織物をフ
ラン樹脂等で固めた成形物を焼成して得られる炭素材
に、コールタールまたはコールタールおよび／またはピ
ッチとフラン樹脂とを含浸させたのち焼成し、含浸、焼
成を繰り返し、且つ少なくとも１回は２３００℃以上で
焼成して得られた動的摩擦係数が０．１〜０．４０、摩
耗量が１００×１０-4mm／面／停止以下である炭素繊維
強化炭素摩擦材（特公昭60−54270 号公報）。A friction element for in-oil operation for transmitting force between moving parts, comprising a support material and a friction layer comprising a carbon fiber web impregnated with an organic resin binder (JP-A-50-72050) JP-A-2003-163, and a composition containing a fibrous substance such as carbon fiber and a binder is subjected to pressure and heat molding.
A method for producing a friction material heated in a non-oxidizing atmosphere at 0 to 1000 ° C. (Japanese Patent Application Laid-Open No. Sho 62-21528). , Coal tar or coal tar and / or pitch and a furan resin are impregnated and fired, and the impregnation and firing are repeated, and fired at least once at 2300 ° C. or more to obtain a dynamic friction coefficient of 0. A carbon fiber reinforced carbon friction material having a wear amount of 100 × 10 −4 mm / surface / stop or less (1 to 0.40) (Japanese Patent Publication No. 60-54270).
【０００４】このほか、連続多孔度を有する炭素繊維の
支持体に熱分解炭素の被膜を形成して前記連続多孔度が
１５〜８５％の範囲にあるエネルギー吸収用摩擦アセン
ブリー（特公平２−37492 号公報）、炭素繊維で織って
形成される網目状織布と、化学的蒸着(CVD) 処理によっ
て前記炭素繊維の表面にのみ炭素被膜を施し、炭素被膜
形成後も網目状織布が多孔性を保持している湿式摩擦材
料（特公平２−40890号公報）なども提案されている。[0004] In addition, an energy absorbing friction assembly having a continuous porosity in the range of 15 to 85% by forming a coating of pyrolytic carbon on a carbon fiber support having continuous porosity (Japanese Patent Publication No. 2-37492). Publication), a mesh-like woven fabric formed by weaving with carbon fibers, and a carbon coating is applied only to the surface of the carbon fiber by a chemical vapor deposition (CVD) process. And the like (for example, Japanese Patent Publication No. 2-40890).
【０００５】また、特開平５−２２２３５３号公報に
は、カーボン繊維、グラファイト繊維などを含む繊維素
材、熱硬化性樹脂、ゴム配合物およびカーボンブラック
からなり、カーボンブラックが、摩擦材に対して体積比
率で２〜１５％の割合で配合されてなることを特徴とす
る摩擦材が提案されている。Japanese Patent Application Laid-Open No. 5-222353 discloses a fiber material containing carbon fiber and graphite fiber, a thermosetting resin, a rubber compound, and carbon black. A friction material characterized by being blended at a ratio of 2 to 15% has been proposed.
【０００６】湿式摩擦材は、摩擦面間に介在する潤滑油
などの油状成分により耐焼付性や耐摩耗性が維持される
ため、潤滑油などの油状成分が常に摩擦面間に介在する
ことが要求され、摩擦材自体の油液保持能力が耐焼付性
や耐摩耗性などに大きな影響を与えることになる。その
ため、摩擦材の組織内部に油液を吸蔵保持するための適
度の気孔や空隙を保有させることが必要となる。[0006] Since the wet friction material maintains seizure resistance and wear resistance due to oil components such as lubricating oil interposed between friction surfaces, oil components such as lubricating oil are always interposed between friction surfaces. It is required, and the oil-liquid holding capacity of the friction material itself greatly affects seizure resistance, abrasion resistance, and the like. Therefore, it is necessary to have appropriate pores and voids for storing and holding the oil liquid inside the tissue of the friction material.
【０００７】そこで、本出願人は炭素繊維を基材として
油状成分の吸蔵保持性に優れる湿式炭素質摩擦材の開発
について鋭意研究を行い、クロスピッチ幅が０．７〜
３．０mmの炭素繊維平織クロスに炭化性の熱硬化性樹脂
液とカーボンブラックを配合した混練物を被着して熱硬
化し、得られたＣＦＲＰの硬化シートを所定形状に裁断
加工したのち金属支持板に接合することを特徴とする炭
素系湿式摩擦材の製造方法（特開平９−71665 号公
報）、クロスピッチ幅が０．７〜３．０mmの炭素繊維平
織クロスに炭化性の熱硬化性樹脂液を含浸して３５〜５
０％の樹脂分を被着させ、加熱硬化して得られた細孔直
径０．１〜３００μm における気孔率が０．５〜３５％
の硬化シートを所定形状に裁断加工した後、金属支持板
に接合することを特徴とする湿式摩擦材の製造方法（特
開平９−324055号公報）などを開発提案した。これらの
技術によれば、高度の摩擦係数と耐摩耗性とをバランス
よく備えた湿式炭素摩擦材を得ることができる。Accordingly, the present applicant has conducted intensive studies on the development of a wet carbonaceous friction material having excellent storage and retention properties for oily components using carbon fiber as a base material.
A kneaded mixture of a carbonizable thermosetting resin liquid and carbon black is applied to a 3.0 mm carbon fiber plain woven cloth, heat-cured, and the obtained CFRP cured sheet is cut into a predetermined shape and then cut into metal. A method for producing a carbon-based wet friction material characterized by being joined to a support plate (Japanese Patent Application Laid-Open No. 9-71665). 35 to 5
The porosity at a pore diameter of 0.1 to 300 μm obtained by applying a 0% resin component and curing by heating is 0.5 to 35%.
A method of manufacturing a wet friction material characterized by cutting the cured sheet into a predetermined shape and then joining the sheet to a metal support plate (Japanese Patent Application Laid-Open No. 9-324055) was developed and proposed. According to these techniques, it is possible to obtain a wet carbon friction material having a high level of friction coefficient and wear resistance in a well-balanced manner.
【０００８】[0008]
【発明が解決しようとする課題】本発明者らは、摩擦性
能に優れた炭素質系の湿式摩擦材について、引き続き開
発研究を進め、炭素繊維クロスに熱硬化性樹脂およびゴ
ムの混合分散液を含浸、硬化することで得られた摩擦材
は柔軟性をもち、相手板へのなじみ性が向上するために
接触点が増加して摩擦係数の向上を図ることができる。
また、熱硬化性樹脂分およびゴム分に適切な量のカーボ
ンブラックを含むことで炭素繊維間の結合強度が高ま
り、耐摩耗性が向上して優れた摩擦性能が得られること
を見出した。DISCLOSURE OF THE INVENTION The present inventors have continued research and development on a carbonaceous wet friction material having excellent frictional performance, and have prepared a mixed dispersion of a thermosetting resin and rubber on a carbon fiber cloth. The friction material obtained by impregnation and hardening has flexibility, and since the conformability to a mating plate is improved, the number of contact points is increased and the friction coefficient can be improved.
In addition, it has been found that by including an appropriate amount of carbon black in the thermosetting resin component and the rubber component, the bonding strength between carbon fibers is increased, the wear resistance is improved, and excellent friction performance is obtained.
【０００９】すなわち、本発明は、この知見を基に開発
されたもので、その目的は摩擦係数が高く、その安定性
に優れ、また耐摩耗性も高位にあって、摩擦性能の優れ
た炭素質湿式摩擦材を提供することにある。That is, the present invention has been developed on the basis of this finding, and its object is to provide a carbon material having a high friction coefficient, excellent stability, high wear resistance, and excellent friction performance. An object of the present invention is to provide a wet friction material.
【００１０】[0010]
【課題を解決するための手段】上記の目的を達成するた
めの本発明による炭素質湿式摩擦材は、炭素繊維クロス
に、熱硬化性樹脂およびゴムの混合分散液を含浸、加熱
硬化した炭素繊維複合摩擦材シートを、所定形状に裁断
加工して金属支持板に接合した炭素質湿式摩擦材であっ
て、炭素繊維複合摩擦材シートの気孔率が２０％以下、
炭素繊維複合摩擦材シート中の熱硬化性樹脂分とゴム分
との重量比が５０／５０〜９５／５からなることを構成
上の特徴とする。According to the present invention, there is provided a carbonaceous wet friction material according to the present invention, wherein a carbon fiber cloth is impregnated with a mixed dispersion of a thermosetting resin and a rubber, and is heated and cured. A carbonaceous wet friction material in which a composite friction material sheet is cut into a predetermined shape and joined to a metal support plate, wherein the carbon fiber composite friction material sheet has a porosity of 20% or less;
The structural characteristic is that the weight ratio between the thermosetting resin component and the rubber component in the carbon fiber composite friction material sheet is 50/50 to 95/5.
【００１１】また、好ましくは、炭素繊維複合摩擦材シ
ート中の熱硬化性樹脂分とゴム分との和１００重量部に
対して、カーボンブラックが０〜１００重量部の割合で
配合されたものであり、カーボンブラックはハード系フ
ァーネスカーボンブラックであることが好ましい。Preferably, carbon black is blended in a ratio of 0 to 100 parts by weight with respect to 100 parts by weight of the sum of the thermosetting resin component and the rubber component in the carbon fiber composite friction material sheet. Yes, the carbon black is preferably a hard type furnace carbon black.
【００１２】[0012]
【発明の実施の形態】本発明の摩擦材を構成する基材と
なる炭素繊維クロスとしては、ポリアクリロニトリル
系、レーヨン系、ピッチ系などの原料から製造された炭
素繊維フィラメントを束ねたトウを編組して作製した平
織、綾織、朱子織などの織物が適用される。なお、トウ
に撚りを与えて編組した織物や炭素繊維の濡れ性を改善
するために表面処理を施したものも好ましく用いられ
る。BEST MODE FOR CARRYING OUT THE INVENTION The carbon fiber cloth as a base material constituting the friction material of the present invention is a braided tow obtained by bundling carbon fiber filaments produced from raw materials such as polyacrylonitrile, rayon and pitch. Fabrics such as plain weave, twill weave, and satin weave are applied. In addition, a woven fabric obtained by twisting the tow and a braided fabric or a fabric subjected to a surface treatment in order to improve the wettability of the carbon fiber is also preferably used.
【００１３】この炭素繊維クロスに含浸する混合分散液
中の熱硬化性樹脂には、例えばフェノール系樹脂、フラ
ン系樹脂、エポキシ系樹脂あるいはこれらの混合樹脂な
どが用いられ、また、混合分散液中のゴムには耐油性や
耐熱性が高い、例えばニトリルゴム、アクリルゴム、エ
ピクロルヒドリンゴムあるいはこれらの混合ゴムなどが
好適に用いられる。As the thermosetting resin in the mixed dispersion liquid impregnated into the carbon fiber cloth, for example, a phenol resin, a furan resin, an epoxy resin or a mixed resin thereof is used. Rubber having high oil resistance and heat resistance, for example, nitrile rubber, acrylic rubber, epichlorohydrin rubber, or a mixed rubber thereof is suitably used as the rubber.
【００１４】混合分散液は、上記の熱硬化性樹脂および
ゴムを有機溶媒、例えばメチルエチルケトンなどのケト
ン類に溶解分散させて調製される。この場合、混合分散
液中の熱硬化性樹脂分とゴム分との重量比が５０／５０
〜９５／５となるように調整して、ロールミキサやボー
ルミルなどにより混合し、溶解分散させる。The mixed dispersion is prepared by dissolving and dispersing the above-mentioned thermosetting resin and rubber in an organic solvent, for example, a ketone such as methyl ethyl ketone. In this case, the weight ratio between the thermosetting resin component and the rubber component in the mixed dispersion is 50/50.
The mixture is adjusted so as to be 95/5, mixed by a roll mixer or a ball mill, and dissolved and dispersed.
【００１５】このようにして調製した混合分散液を、塗
布、浸漬などの常用の手段により炭素繊維クロスに含浸
し、次いで、風乾、加熱などにより有機溶媒を揮散除去
して得られたプリプレグシートを、耐熱性の金属板、セ
ラミック板などの平板に挟持して、加熱炉内に入れ、適
度の加圧下に保持しながら、例えば１０℃／hr以下の昇
温速度で１５０〜３００℃程度の温度に加熱し、適宜時
間保持して加熱硬化することにより、熱硬化性樹脂分と
ゴム分との重量比が５０／５０〜９５／５の炭素繊維複
合摩擦材シートが得られる。The prepreg sheet obtained by impregnating a carbon fiber cloth with the mixed dispersion prepared as described above by usual means such as coating and dipping, and then volatilizing and removing the organic solvent by air drying, heating and the like is obtained. A temperature of about 150 to 300 ° C. at a temperature rising rate of, for example, 10 ° C./hr or less, while being held in a heating furnace while being held between flat plates such as a heat-resistant metal plate and a ceramic plate, and kept under appropriate pressure. Then, the mixture is heated and cured for an appropriate time to obtain a carbon fiber composite friction material sheet having a weight ratio of a thermosetting resin component to a rubber component of 50/50 to 95/5.
【００１６】本発明の炭素質湿式摩擦材は、このように
して得られた炭素繊維複合摩擦材シートを、打ち抜き加
工や切断加工により所定形状に裁断加工して作製した摩
擦ライニングを、例えば鉄板のような金属支持板に一体
に接合して形成してなるものである。なお、接合は樹脂
質の接着材を介して熱圧する方法で行うことが好まし
く、例えば、予め金属支持板の表面をショットブラスト
して粗面化したのち、含浸した熱硬化性樹脂と同種の熱
硬化性樹脂液を塗布し、摩擦ライニングを熱圧接合する
方法を採ることが好ましい。The carbonaceous wet friction material of the present invention is obtained by cutting a carbon fiber composite friction material sheet obtained as described above into a predetermined shape by punching or cutting into a friction lining. It is formed by integrally joining to such a metal support plate. The joining is preferably performed by a method of hot-pressing through a resinous adhesive. For example, after the surface of the metal support plate is shot-blasted and roughened, the same type of thermosetting resin as the impregnated thermosetting resin is used. It is preferable to adopt a method in which a curable resin liquid is applied and the friction lining is joined by hot and pressure bonding.
【００１７】このように本発明の炭素質湿式摩擦材は、
高強度、高弾性の炭素繊維クロスを基材として、熱硬化
性樹脂およびゴムが特定の量比で複合した炭素繊維複合
摩擦材シートを摩擦ライニングとするものであるから、
炭素繊維クロスに熱硬化性樹脂のみを複合した摩擦ライ
ニングに比べて、全体の弾性が低下して相手板とのなじ
み性が向上するので相手板との接触点が増加し、摩擦係
数が向上して優れた摩擦性能が発揮される。As described above, the carbonaceous wet friction material of the present invention comprises:
Since a high-strength, high-elastic carbon fiber cloth is used as a base material, a carbon fiber composite friction material sheet in which a thermosetting resin and rubber are compounded at a specific ratio is used as a friction lining,
Compared to a friction lining in which only a thermosetting resin is combined with a carbon fiber cloth, the overall elasticity is reduced and the compatibility with the mating plate is improved, so the number of points of contact with the mating plate is increased and the friction coefficient is improved. Excellent friction performance is exhibited.
【００１８】この場合、耐摩耗性を維持するため炭素繊
維複合摩擦材シートの気孔率が２０％以下であることが
前提となり、また炭素繊維複合摩擦材シート中のゴム分
の量比が大きくなり、熱硬化性樹脂分が５０を下回り、
ゴム分が５０を上回ると、炭素繊維複合摩擦材シートの
強度が低下して摩耗が増大することになる。一方、熱硬
化性樹脂分が９５を越え、ゴム分が５未満となると、全
体の弾性低下が僅少となるために相手板とのなじみ性も
改善されず、優れた摩擦性能を発揮することができなく
なる。In this case, it is assumed that the porosity of the carbon fiber composite friction material sheet is 20% or less in order to maintain the wear resistance, and the ratio of the rubber content in the carbon fiber composite friction material sheet is increased. The thermosetting resin content is below 50,
When the rubber content exceeds 50, the strength of the carbon fiber composite friction material sheet decreases, and the wear increases. On the other hand, when the thermosetting resin content exceeds 95 and the rubber content is less than 5, the elasticity of the whole becomes small, so that the conformability with the mating plate is not improved, and excellent friction performance can be exhibited. become unable.
【００１９】そこで、請求項２および請求項３の発明
は、ゴム成分を添加、配合したことによる炭素繊維複合
摩擦材シートの強度低下による耐摩耗性の悪化を、ゴム
補強用のカーボンブラックを配合することにより抑制す
るものである。すなわち、炭素繊維複合摩擦材シート中
に存在するゴム分１００重量部に対し、カーボンブラッ
クを０〜１００重量部の割合で配合することにより、炭
素繊維複合摩擦材シートの強度低下による耐摩耗性の悪
化を抑制することが可能となる。なお、配合するカーボ
ンブラックとしては、高補強性、高耐摩耗性のハード系
ファーネスカーボンブラック、例えば、Ｎ３００以上の
ＨＡＦ級ファーネスカーボンブラックが好適に使用され
る。添加したカーボンブラックは熱硬化性樹脂分および
ゴム分中に分散し、炭素繊維間の結合強度を適度に補強
する効果を奏する。しかし、カーボンブラックの配合量
がゴム分１００重量部に対して１００重量部を越える場
合には、結合強度が強まりすぎて摩擦係数の低下を引き
起こすため好ましくない。Therefore, the invention of claims 2 and 3 is intended to reduce the abrasion resistance caused by the decrease in the strength of the carbon fiber composite friction material sheet due to the addition and compounding of the rubber component, and to compound the carbon black for rubber reinforcement. By doing so. That is, by blending carbon black at a ratio of 0 to 100 parts by weight with respect to 100 parts by weight of the rubber component present in the carbon fiber composite friction material sheet, the wear resistance due to a decrease in the strength of the carbon fiber composite friction material sheet is reduced. Deterioration can be suppressed. In addition, as the carbon black to be blended, a hard type furnace carbon black having high reinforcement and high wear resistance, for example, an HAF grade carbon black of N300 or more is preferably used. The added carbon black is dispersed in the thermosetting resin component and the rubber component, and has an effect of appropriately reinforcing the bonding strength between carbon fibers. However, if the compounding amount of carbon black exceeds 100 parts by weight with respect to 100 parts by weight of the rubber component, the bonding strength becomes too strong and the friction coefficient is lowered, which is not preferable.
【００２０】このように、本発明による炭素質湿式摩擦
材は、炭素繊維クロスを熱硬化性樹脂およびゴムを混合
分散した結合材で複合化した炭素繊維複合シートから形
成される。この炭素繊維複合摩擦材シート中の熱硬化性
樹脂分とゴム分との重量比が５０／５０〜９５／５から
なることに設定することにより耐摩耗性を損なうことな
く、相手板とのなじみ性を向上させて接触点を増加し、
高摩擦係数を発揮する炭素質湿式摩擦材を提供すること
が可能となる。さらに、熱硬化性樹脂分およびゴム分に
カーボンブラック、とくにゴム補強用で高補強性と高耐
摩耗性の作用があるハード系ファーネスカーボンブラッ
クを添加、配合することにより高摩擦係数を維持しなが
ら耐摩耗性を向上した優れた摩擦性能の炭素質湿式摩擦
材を提供することが可能となる。As described above, the carbonaceous wet friction material according to the present invention is formed from a carbon fiber composite sheet in which a carbon fiber cloth is composited with a binder in which a thermosetting resin and rubber are mixed and dispersed. By setting the weight ratio between the thermosetting resin component and the rubber component in the carbon fiber composite friction material sheet to be 50/50 to 95/5, the compatibility with the mating plate can be achieved without impairing the wear resistance. To increase the number of points of contact
It is possible to provide a carbonaceous wet friction material exhibiting a high friction coefficient. Further, by adding and blending carbon black to the thermosetting resin and rubber components, in particular, a hard type furnace carbon black that has a high reinforcing property and a high abrasion resistance for rubber reinforcement, while maintaining a high friction coefficient It is possible to provide a carbonaceous wet friction material having excellent friction performance with improved wear resistance.
【００２１】[0021]
【実施例】以下、本発明の実施例を比較例と対比して具
体的に説明する。EXAMPLES Examples of the present invention will be specifically described below in comparison with comparative examples.
【００２２】実施例１〜６、比較例１〜５ 炭素繊維クロスにはポリアクリロニトリル系炭素繊維の
6k(6000本) のトウを編組した平織クロスを用いた。熱
硬化性樹脂にフェノール樹脂、ゴムにアクリロニトリル
ブタジエンゴム（ＮＢＲ）、有機溶媒にメチルエチルケ
トンを用い、フェノール樹脂とＮＢＲとの重量比を変え
てボールミルにより混合し、フェノール樹脂とＮＢＲの
重量比の異なる混合分散液を調製した。また、カーボン
ブラック〔東海カーボン（株）製、シースト３〕をＮＢ
Ｒに対し異なる量比で添加した混合分散液も調製した。Examples 1 to 6 and Comparative Examples 1 to 5 Polyacrylonitrile-based carbon fibers were used for the carbon fiber cloth.
A plain weave cloth braided with 6k (6000) tows was used. Using a phenol resin as the thermosetting resin, acrylonitrile butadiene rubber (NBR) as the rubber, and methyl ethyl ketone as the organic solvent, mixing with a ball mill while changing the weight ratio between the phenol resin and the NBR, and mixing the phenol resin and the NBR at different weight ratios A dispersion was prepared. In addition, carbon black [Tokai Carbon Co., Ltd., Seast 3] was purchased from NB.
Mixed dispersions added at different ratios to R were also prepared.
【００２３】これらの混合分散液を平織クロスに塗布し
て含浸したのち、２４時間風乾してメチルエチルケトン
を揮散除去するとともに予備硬化した。このプリプレグ
を黒鉛平板に挟持して１０gf/cm2で加圧しながら電気炉
に入れ、１０℃/hr の昇温速度で２００℃に加熱し、１
時間保持して加熱硬化した。このようにして得られた炭
素繊維複合摩擦材シートを外径７７mm、内径５３mmのド
ーナツ状に打ち抜き、裁断加工して摩擦ライニングを作
製した。The mixed dispersion was applied to a plain weave cloth and impregnated, and then air-dried for 24 hours to volatilize and remove methyl ethyl ketone and pre-cured. This prepreg was sandwiched between graphite plates, placed in an electric furnace while being pressurized at 10 gf / cm 2 , and heated to 200 ° C. at a rate of 10 ° C./hr.
The resin was cured by heating while holding for a time. The carbon fiber composite friction material sheet thus obtained was punched into a donut shape having an outer diameter of 77 mm and an inner diameter of 53 mm, and cut to form a friction lining.
【００２４】これらの摩擦ライニングを、予めショット
ブラストしてフェノール樹脂系接着剤を塗布、予備硬化
した鉄製の金属支持板にセットして、温度２２０℃、圧
力６０kgf/cm2 の条件で熱圧接着を行い、試験用摩擦板
を得た。These friction linings are shot-blasted in advance, coated with a phenolic resin adhesive, set on a pre-cured iron metal support plate, and hot-press bonded at a temperature of 220 ° C. and a pressure of 60 kgf / cm 2. Was performed to obtain a test friction plate.
【００２５】これらの摩擦材について、下記の条件で定
速型試験機により湿式摩擦試験を行った。 摩擦材の相手板；鋼材ＳＫ５ 回転数；２０ rpm 押付け圧力；２０kgf/cm2 オイル；ギヤオイル GL-5 、75w-90These friction materials were subjected to a wet friction test using a constant speed tester under the following conditions. Steel material SK5 Number of revolutions; 20 rpm Pressing pressure; 20 kgf / cm 2 oil; gear oil GL-5, 75w-90
【００２６】摩擦試験は１００時間連続して行い、摩擦
係数および摩耗量を測定した。得られた結果を、炭素繊
維複合摩擦材シート中のフェノール樹脂、ＮＢＲおよび
カーボンブラックの重量比とともに表１に示した。The friction test was performed continuously for 100 hours, and the friction coefficient and the wear amount were measured. The obtained results are shown in Table 1 together with the weight ratios of the phenolic resin, NBR and carbon black in the carbon fiber composite friction material sheet.
【００２７】[0027]
【表１】 *1 ゴム１００重量部に対するカーボンブラックの重量部 *2 水銀圧入法による[Table 1] * 1 Parts by weight of carbon black based on 100 parts by weight of rubber * 2 By mercury intrusion method
【００２８】表１より、本発明の要件を備えた実施例の
炭素質湿式摩擦材、すなわち炭素繊維複合摩擦材シート
中の熱硬化性樹脂分とゴム分との重量比が５０／５０〜
９５／５の範囲にある実施例１〜３の摩擦材は、高摩擦
係数で低摩耗量を実現している。これに対してゴム分が
少ない比較例１では弾性が高く相手板とのなじみ性が悪
いために摩擦係数は低い。一方、ゴム分が多い比較例２
では、なじみ性の向上により摩擦係数は高くなるが、摩
擦材が強度低下するために摩耗量が増大して不味であ
る。このようにゴム分が増すと摩耗量が増加する傾向に
あるが、実施例４〜６のように熱硬化性樹脂分およびゴ
ム分中にカーボンブラックを添加、配合することにより
高摩擦係数を維持しつつ摩耗量の増加を抑制できる。し
かし、添加、配合するカーボンブラック量が比較例３の
ように過剰であると、補強作用が強まり過ぎて摩擦係数
の低下を引き起こす。また、ゴム分が過剰であると比較
例４のように摩耗量低減効果は小さくなる。さらに、比
較例５のように熱硬化性樹脂分とゴム分との構成比率が
好適でも、摩擦材の気孔率が高いと摩耗量が増加して不
味である。From Table 1, it can be seen that the weight ratio of the thermosetting resin component to the rubber component in the carbonaceous wet friction material of the embodiment satisfying the requirements of the present invention, that is, the carbon fiber composite friction material sheet is 50/50 to 50%.
The friction materials of Examples 1 to 3 in the range of 95/5 realize a low coefficient of friction and a low wear amount. On the other hand, in Comparative Example 1 in which the rubber content is small, the coefficient of friction is low because the elasticity is high and the compatibility with the mating plate is poor. On the other hand, Comparative Example 2 containing a large amount of rubber
In this case, the friction coefficient increases due to the improvement of the conformability, but the friction material decreases in strength, so that the amount of wear increases and the taste is unpleasant. As the rubber content increases, the amount of wear tends to increase. However, a high friction coefficient is maintained by adding and blending carbon black into the thermosetting resin component and the rubber component as in Examples 4 to 6. While suppressing an increase in the amount of wear. However, when the amount of carbon black added and blended is excessive as in Comparative Example 3, the reinforcing effect becomes too strong, and the friction coefficient is reduced. When the rubber content is excessive, the effect of reducing the amount of wear is reduced as in Comparative Example 4. Furthermore, even if the composition ratio of the thermosetting resin component and the rubber component is suitable as in Comparative Example 5, if the friction material has a high porosity, the amount of wear increases and the taste is unpleasant.
【００２９】[0029]
【発明の効果】以上のとおり、本発明の炭素質湿式摩擦
材は、炭素繊維クロスを熱硬化性樹脂にゴムを分散した
結合材で複合化した炭素繊維複合摩擦材シートから形成
されており、炭素繊維複合摩擦材シートの気孔率が２０
％以下、この炭素繊維複合摩擦材シート中の熱硬化性樹
脂分とゴム分との重量比が５０／５０〜９５／５からな
るに設定することにより、摺動時において相手板とのな
じみ性向上による摩擦係数の増加と、強度保持による低
摩耗量の炭素質湿式摩擦材を提供することが可能とな
る。また、熱硬化性樹脂分とゴム分との量比でゴム分が
増加すると耐摩耗性の低下を発現するが、カーボンブラ
ック、特にゴム補強用のカーボンブラック、中でも高補
強性、高耐摩耗性のハード系ファーネスカーボンブラッ
クを添加、配合することにより、これらの性能低下が抑
制され、高摩擦係数、低摩耗量の炭素質湿式摩擦材を提
供することが可能となる。As described above, the carbonaceous wet friction material of the present invention is formed from a carbon fiber composite friction material sheet in which a carbon fiber cloth is composited with a binder obtained by dispersing rubber in a thermosetting resin. The porosity of the carbon fiber composite friction material sheet is 20
% Or less, by setting the weight ratio between the thermosetting resin component and the rubber component in the carbon fiber composite friction material sheet to be 50/50 to 95/5, the conformability with the mating plate during sliding is improved. It is possible to provide a carbonaceous wet friction material having an increased friction coefficient due to the improvement and a low wear amount due to the strength retention. In addition, when the rubber content is increased by the ratio of the thermosetting resin component to the rubber component, a decrease in wear resistance is exhibited. However, carbon black, particularly carbon black for rubber reinforcement, especially high reinforcement and high wear resistance. By adding and blending the hard type furnace carbon black, it is possible to provide a carbonaceous wet friction material having a high friction coefficient and a low abrasion amount while suppressing these performance deteriorations.
───────────────────────────────────────────────────── 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） Ｃ０９Ｋ 3/14 ５２０ Ｃ０９Ｋ 3/14 ５２０Ｆ ５２０Ｍ ５３０ ５３０Ｄ ５３０Ｆ Ｄ０６Ｍ 11/74 Ｄ０６Ｍ 15/41 15/41 15/693 15/693 Ｆ１６Ｄ 69/02 Ａ Ｆ１６Ｄ 69/02 Ｄ０６Ｍ 101:40 // Ｄ０６Ｍ 101:40 11/00 Ｂ Ｆターム(参考） 3J058 BA41 BA76 EA36 GA12 GA27 GA28 GA55 GA65 GA68 GA88 GA92 GA93 GA94 4F071 AA12 AA33 AA41 AA42 AA51 AB03 AD00 AE12 AH19 DA03 DA11 DA15 4J002 AC07X BG04X CC03W CD00W CH04X CH09W DA016 DA037 FA046 FD016 FD017 FD206 FD207 GT00 4L031 AA27 AB31 AB32 BA02 BA33 4L033 AA09 AB04 AB05 AC15 CA33 CA34 CA49 CA68 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C09K 3/14 520 C09K 3/14 520F 520M 530 530D 530F D06M 11/74 D06M 15/41 15/41 15 / 693 15/693 F16D 69/02 A F16D 69/02 D06M 101: 40 // D06M 101: 40 11/00 B F term (reference) 3J058 BA41 BA76 EA36 GA12 GA27 GA28 GA55 GA65 GA68 GA88 GA92 GA93 GA94 4F071 AA12 AA33 AA41 AA42 AA51 AB03 AD00 AE12 AH19 DA03 DA11 DA15 4J002 AC07X BG04X CC03W CD00W CH04X CH09W DA016 DA037 FA046 FD016 FD017 FD206 FD207 GT00 4L031 AA27 AB31 AB32 BA32 BA33 4L033 AA09 AB04 AB05 AC33 CA33 CA34
Claims (3)
ゴムの混合分散液を含浸、加熱硬化した炭素繊維複合摩
擦材シートを、所定形状に裁断加工して金属支持板に接
合した炭素質湿式摩擦材であって、炭素繊維複合摩擦材
シートの気孔率が２０％以下、炭素繊維複合摩擦材シー
ト中の熱硬化性樹脂分とゴム分との重量比が５０／５０
〜９５／５からなることを特徴とする炭素質湿式摩擦
材。1. A carbonaceous wet method in which a carbon fiber cloth is impregnated with a mixed dispersion of a thermosetting resin and rubber, and a heat-cured carbon fiber composite friction material sheet is cut into a predetermined shape and joined to a metal support plate. A friction material, wherein the porosity of the carbon fiber composite friction material sheet is 20% or less, and the weight ratio of the thermosetting resin component to the rubber component in the carbon fiber composite friction material sheet is 50/50.
-95/5 carbonaceous wet friction material.
ックが０〜１００重量部の割合で配合された、請求項１
記載の炭素質湿式摩擦材。2. The composition according to claim 1, wherein carbon black is compounded in a proportion of 0 to 100 parts by weight with respect to 100 parts by weight of the rubber.
The carbonaceous wet friction material as described in the above.
カーボンブラックである、請求項２記載の炭素質湿式摩
擦材。3. The carbonaceous wet friction material according to claim 2, wherein the carbon black is a hard furnace carbon black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000374054A JP2002179811A (en) | 2000-12-08 | 2000-12-08 | Carbonaceous wet friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000374054A JP2002179811A (en) | 2000-12-08 | 2000-12-08 | Carbonaceous wet friction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002179811A true JP2002179811A (en) | 2002-06-26 |
Family
ID=18843326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000374054A Pending JP2002179811A (en) | 2000-12-08 | 2000-12-08 | Carbonaceous wet friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002179811A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005047271A (en) * | 2003-07-29 | 2005-02-24 | Sgl Carbon Ag | Manufacturing method of planar carbon fiber web-based friction material, and friction material manufactured by said method |
| JP2008144773A (en) * | 2006-12-06 | 2008-06-26 | Akebono Brake Ind Co Ltd | Friction material and its manufacturing method |
| CN103320092A (en) * | 2013-06-14 | 2013-09-25 | 陕西科技大学 | Method for preparing wet friction material of nano silicon carbide modified carbon cloth |
| CN110655908A (en) * | 2019-10-11 | 2020-01-07 | 山东万邦新材料科技有限公司 | Preparation method of carbon fiber friction material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05222353A (en) * | 1992-02-12 | 1993-08-31 | Nippon Valqua Ind Ltd | Friction material |
| JPH0762330A (en) * | 1993-08-24 | 1995-03-07 | Hitachi Chem Co Ltd | Composition for friction material and production of friction material therefrom |
| JPH09324055A (en) * | 1996-06-05 | 1997-12-16 | Tokai Carbon Co Ltd | Preparation of wet friction material |
-
2000
- 2000-12-08 JP JP2000374054A patent/JP2002179811A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05222353A (en) * | 1992-02-12 | 1993-08-31 | Nippon Valqua Ind Ltd | Friction material |
| JPH0762330A (en) * | 1993-08-24 | 1995-03-07 | Hitachi Chem Co Ltd | Composition for friction material and production of friction material therefrom |
| JPH09324055A (en) * | 1996-06-05 | 1997-12-16 | Tokai Carbon Co Ltd | Preparation of wet friction material |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005047271A (en) * | 2003-07-29 | 2005-02-24 | Sgl Carbon Ag | Manufacturing method of planar carbon fiber web-based friction material, and friction material manufactured by said method |
| JP2008144773A (en) * | 2006-12-06 | 2008-06-26 | Akebono Brake Ind Co Ltd | Friction material and its manufacturing method |
| CN103320092A (en) * | 2013-06-14 | 2013-09-25 | 陕西科技大学 | Method for preparing wet friction material of nano silicon carbide modified carbon cloth |
| CN110655908A (en) * | 2019-10-11 | 2020-01-07 | 山东万邦新材料科技有限公司 | Preparation method of carbon fiber friction material |
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