JP2003286476A - Method for producing friction material composition and method for producing friction material - Google Patents
Method for producing friction material composition and method for producing friction materialInfo
- Publication number
- JP2003286476A JP2003286476A JP2003011870A JP2003011870A JP2003286476A JP 2003286476 A JP2003286476 A JP 2003286476A JP 2003011870 A JP2003011870 A JP 2003011870A JP 2003011870 A JP2003011870 A JP 2003011870A JP 2003286476 A JP2003286476 A JP 2003286476A
- Authority
- JP
- Japan
- Prior art keywords
- composition
- friction material
- producing
- friction
- furfural
- 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]
【発明の属する技術分野】本発明は、自動車のディスク
ブレーキパッド、ブレーキライニング等に使用されてい
る摩擦材用組成物及び摩擦材の製造方法に関するもので
あり、更に詳しくは摩擦材の製造において摩擦材料の偏
析、粉塵の発生が少ない摩擦材用組成物の製造方法、及
びブレーキ制動時における摩擦性能、機械的強度が良好
な摩擦材の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for a friction material used for a disc brake pad, a brake lining, etc. of an automobile and a method for producing the friction material. More specifically, it relates to friction in the production of the friction material. The present invention relates to a method for producing a friction material composition in which material segregation and dust generation are small, and a method for producing a friction material having good friction performance and mechanical strength during braking.
【０００２】[0002]
【従来の技術】従来、自動車のディスクブレーキパッ
ド、ブレーキライニング等として使用されている摩擦材
には、その基材として石綿が多く使用されていたが、石
綿はその粉塵の人体への有害性が指摘された結果、その
使用が規制されつつあり、石綿を使用しない摩擦材に対
する要求が強くなってきている。2. Description of the Related Art Conventionally, asbestos has been often used as a base material for friction materials used as automobile disc brake pads, brake linings, etc. However, asbestos is not harmful to humans due to its dust. As a result of being pointed out, the use thereof is being regulated, and there is an increasing demand for a friction material that does not use asbestos.
【０００３】そこで、石綿を使用しない非石綿系摩擦材
について多くの提案がなされてきたが、それらの多くは
繊維成分として耐熱性有機繊維、ガラス繊維、金属繊維
を用い、結合材成分としてフェノール樹脂等の熱硬化性
樹脂を、充填材成分として黒鉛、二硫化モリブデンのよ
うな潤滑材やアルミナ、ケイ酸ジルコニウム等のアブレ
ッシブを用いたものである。従来の摩擦材用組成物の多
くは、上記の摩擦材基材をそのままレリゲミキサー等に
より混合して得られる乾式混合方式により製造されてい
る。その後、摩擦材用組成物は必要に応じ予備成形さ
れ、次に加熱加圧成形、熱処理が施され、摩擦材として
完成する。Therefore, many proposals have been made for non-asbestos-based friction materials that do not use asbestos, but most of them use heat-resistant organic fibers, glass fibers, and metal fibers as fiber components, and phenol resin as binder components. A thermosetting resin such as, for example, graphite, a lubricant such as molybdenum disulfide, or an abrasive such as alumina or zirconium silicate is used as a filler component. Most of conventional friction material compositions are produced by a dry mixing method obtained by mixing the above friction material base material as it is with a Religer mixer or the like. After that, the composition for friction material is preformed, if necessary, and then subjected to heat and pressure molding and heat treatment to complete the friction material.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、補強繊
維として上記の耐熱性有機繊維、ガラス繊維、金属繊維
等を使用した摩擦材は、石綿を使用した摩擦材に比べて
優れた耐熱性、耐摩耗性を示すものが多いが、反面、強
靱性や粘着性に乏しく、その結果、形状や大きさ、比重
が大きく異なる摩擦材基材を混合する際、偏析しやすく
均質なものができないという欠点がある。また、微粉末
状の摩擦材基材が多い場合は、混合工程、成型工程にお
いて粉塵が発生して作業環境が悪化する。However, the friction material using the above-mentioned heat-resistant organic fiber, glass fiber, metal fiber or the like as the reinforcing fiber is superior in heat resistance and abrasion resistance to the friction material using asbestos. However, it has poor toughness and adhesiveness, and as a result, when mixing friction material base materials that differ greatly in shape, size, and specific gravity, segregation is likely to occur, and a homogeneous material cannot be formed. is there. In addition, when there are many fine powdery friction material base materials, dust is generated in the mixing step and the molding step, which deteriorates the working environment.
【０００５】これらの欠点を補うために、有機溶媒に溶
かした樹脂、或いは水溶性樹脂，エマルジョン等の液体
を摩擦材基材に投入し混合する湿式混合方式が開発され
ているが、有機溶媒を使用した場合は人体への悪影響、
火災の危険があり、また、水溶性樹脂，エマルジョンを
使用した場合は摩擦性能が低下する傾向がある。そこ
で、本発明が解決しようとする課題は、偏析せず、作業
環境を悪化させず、また摩擦性能等が低下しない摩擦材
用組成物及び摩擦材の製造方法を提供することである。In order to make up for these drawbacks, a wet mixing system has been developed in which a resin dissolved in an organic solvent, or a liquid such as a water-soluble resin or an emulsion is put into a friction material base material and mixed therein. When used, it has a negative effect on the human body,
There is a risk of fire, and the friction performance tends to deteriorate when water-soluble resin or emulsion is used. Therefore, the problem to be solved by the present invention is to provide a composition for a friction material and a method for producing the friction material, which do not cause segregation, do not deteriorate the working environment, and do not reduce the friction performance and the like.
【０００６】[0006]
【課題を解決するための手段及び発明の実施の形態】本
発明は上記の課題を解決することを目的として成された
もので、その構成は繊維成分と結合材成分と充填材成分
との混合物に対し、カシューポリマーとフルフラール
（化学式Ｃ4Ｈ3Ｏ・ＣＨＯ）の混合液を組成物全体の１
〜１２体積％の含有量になるように混合することを特徴
とする摩擦材用組成物の製造方法であり、またこの製造
方法により磨耗材用組成物を得た後、この摩擦材用組成
物を成型、熱処理する摩擦材の製造方法である。Means for Solving the Problems and Embodiments of the Invention The present invention has been made for the purpose of solving the above-mentioned problems, and its constitution is a mixture of a fiber component, a binder component and a filler component. On the other hand, a mixed solution of cashew polymer and furfural (chemical formula C 4 H 3 O.CHO) was added to 1 composition of
A method for producing a friction material composition, characterized in that the composition is mixed so as to have a content of ˜12% by volume. Further, after the abrasion material composition is obtained by this production method, the friction material composition is obtained. It is a method for manufacturing a friction material, which comprises molding and heat treating.
【０００７】カシューポリマーはカシューオイルを酸、
加熱等により重合して得られるものであり、フルフラー
ルは別名２−フルアルデヒドと呼ばれ、化学式Ｃ4Ｈ3Ｏ
・ＣＨＯで表されるものである。即ち、本発明者は、カ
シューポリマーとそれを硬化させるためのフルフラール
の混合液を摩擦材料の混合工程中或いはその前後に投入
することにより、粉塵の発生を抑え、摩擦材料の偏析を
防止し、摩擦特性、機械的強度が良好な摩擦材が得られ
ることを知得し、本発明を成し遂げたのである。Cashew polymers are made from cashew oil with acid,
Furfural, which is obtained by polymerization by heating or the like, is also known as 2-furaldehyde and has a chemical formula of C 4 H 3 O.
-It is represented by CHO. That is, the present inventor, by introducing a mixed solution of cashew polymer and furfural for curing it during or before and after the mixing step of the friction material, suppress the generation of dust, prevent the segregation of the friction material, The inventors have realized that a friction material having excellent friction characteristics and mechanical strength can be obtained, and achieved the present invention.
【０００８】次に本発明について詳細に説明する。本発
明において繊維成分として使用されるものには、アラミ
ド繊維等の有機繊維、ガラス繊維，ロックウール，セラ
ミックス繊維等の無機繊維、銅，青銅，アルミニウム，
黄銅等の金属繊維が挙げられ、結合材としてはフェノー
ル樹脂，尿素樹脂，メラミン樹脂，またはそれらの変性
樹脂のような熱硬化性樹脂が挙げられ、充填材としては
黒鉛，金属粉，カシューダストのような潤滑性のあるも
のや硫酸バリウム，炭酸カルシウム等が挙げられる。Next, the present invention will be described in detail. The fiber component used in the present invention includes organic fibers such as aramid fibers, inorganic fibers such as glass fibers, rock wool and ceramic fibers, copper, bronze, aluminum,
Examples of the binder include thermosetting resins such as phenol resin, urea resin, melamine resin, and modified resins thereof. Examples of the filler include graphite, metal powder, and cashew dust. Lubricants such as these, barium sulfate, calcium carbonate and the like can be mentioned.
【０００９】本発明では、最初に摩擦材の基材である上
記繊維成分、結合材成分、充填材成分を撹拌機で均一に
混合するが、カシューポリマーとフルフラールは撹拌前
或いは撹拌中に他の基材と混合でき、また撹拌後別工程
を設けて混合することもできる。In the present invention, first, the above-mentioned fiber component, binder component, and filler component, which are the base material of the friction material, are uniformly mixed by a stirrer. However, cashew polymer and furfural are mixed with each other before or during stirring. It can be mixed with the base material, or can be mixed in another step after stirring.
【００１０】カシューポリマーとフルフラールの混合液
は、全摩擦材料の表面を覆い粉塵の発生を防止すると同
時に、硬化時には各摩擦材料の結合を強め機械的強度及
び耐摩耗性の向上に役立つことになる。また、フルフラ
ールはカシューポリマーの硬化を効率よく行わせるため
のものであり、これを省くと摩擦材の強度及び耐摩耗性
の向上が充分に発揮できない恐れがある。カシューポリ
マーを硬化させるために使用できる有力な硬化剤として
は、フルフラールの他にパラホルムアルデヒド、ヘキサ
メチレンテトラミンを挙げることができるが、両者とも
耐熱性が低く摩擦材の強度及び耐摩耗性の効果が発揮さ
れにくい。The mixed liquid of cashew polymer and furfural covers the surface of all friction materials to prevent generation of dust, and at the same time, strengthens the bonding of each friction material at the time of curing to help improve mechanical strength and abrasion resistance. . Furfural is for efficiently curing the cashew polymer, and if it is omitted, the strength and wear resistance of the friction material may not be sufficiently improved. In addition to furfural, paraformaldehyde and hexamethylenetetramine can be cited as effective curing agents that can be used to cure the cashew polymer, but both have low heat resistance and the effect of the friction material strength and wear resistance is low. Hard to be demonstrated.
【００１１】カシューポリマーとフルフラールの含有量
は、摩擦材用組成物全体の１〜１２体積％が好ましく、
１％未満の場合は効果が少なく、１２％を超えた場合は
摩擦性能が悪化する恐れがある。カシューポリマーとフ
ルフラールの体積比率は、カシューポリマー／フルフラ
ール＝８５／１５〜７０／３０が好ましく、この範囲以
外では摩擦材の強度及び耐摩耗性の向上が充分に発揮で
きない場合がある。The content of cashew polymer and furfural is preferably 1 to 12% by volume of the entire friction material composition,
If it is less than 1%, the effect is small, and if it exceeds 12%, the friction performance may be deteriorated. The volume ratio of cashew polymer to furfural is preferably cashew polymer / furfural = 85/15 to 70/30, and the strength and abrasion resistance of the friction material may not be sufficiently improved outside this range.
【００１２】また、カシューポリマーは溶媒を使用しな
い方が好ましく、有機溶媒を用いた場合は人体への悪影
響、火災等の危険があり、また水溶性の溶媒を用いた場
合は摩擦性能が低下する恐れがある。Further, it is preferable not to use a solvent for the cashew polymer. When an organic solvent is used, there is a risk of adverse effects on the human body and fire, and when a water-soluble solvent is used, friction performance is deteriorated. There is a fear.
【００１３】混合工程以後の予備成型、加熱加圧成型、
熱処理等については特に制限はなく、従来と同じような
方法で行うことができる。Preforming after the mixing step, heat and pressure molding,
There is no particular limitation on the heat treatment and the like, and the heat treatment can be performed in the same manner as the conventional method.
【００１４】[0014]
【発明の効果】本発明の摩擦材用組成物の製造方法によ
れば、カシューポリマーとフルフラールを含み、これが
各摩擦材料の表面を被覆するので粉塵の発生を防止する
ことができ、摩擦材料の撹拌効果が向上するので摩擦材
料の偏析を防止できる。また、本発明の摩擦材の製造方
法によれば、上述の摩擦材用組成物を用いて作製するの
で、各摩擦材料間の結合が強く均質な摩擦材を得ること
ができ、機械的強度、摩擦性能を向上させることができ
る。According to the method for producing a composition for a friction material of the present invention, since it contains cashew polymer and furfural and covers the surface of each friction material, it is possible to prevent generation of dust, and Since the stirring effect is improved, segregation of the friction material can be prevented. Further, according to the method for producing a friction material of the present invention, since it is produced by using the above-mentioned composition for friction material, it is possible to obtain a friction material having a strong bond between the friction materials and a uniform mechanical strength, Friction performance can be improved.
【００１５】[0015]
【実施例】次に本発明の実施例について説明する。EXAMPLES Next, examples of the present invention will be described.
【００１６】〔実施例Ａ〜Ｆ〕繊維成分としてケブラー
繊維、ロックウール、銅繊維を、結合材成分としてフェ
ノール樹脂を、充填材成分として硫酸バリウム、ケイ酸
ジルコニウム、カシューダスト、グラファイトを用いて
撹拌機によりこれらを均一に混合し、摩擦材料混合品を
得た。次にカシューポリマーとフルフラールの混合液を
加圧ニーダを用いて予め用意した摩擦材料混合品と混練
して、表１に示す組成の実施例Ａ〜Ｆの摩擦材用組成物
を得た。尚、表中の数値は体積％を示す。続いて摩擦材
料混合品を室温、圧力４００ｋｇ／ｃｍ2で予備成型し
た後、温度１５０℃、圧力４００ｋｇ／ｃｍ2で１０分
間加熱加圧成型し、次いで温度２００℃で４時間熱処理
して実施例Ａ〜Ｆの摩擦材を作製した。[Examples A to F] Kevlar fiber, rock wool, and copper fiber were used as fiber components, a phenol resin was used as a binder component, and barium sulfate, zirconium silicate, cashew dust, and graphite were used as filler components. These were uniformly mixed by a machine to obtain a friction material mixed product. Next, the mixed liquid of cashew polymer and furfural was kneaded with a friction material mixture prepared in advance using a pressure kneader to obtain compositions for friction materials of Examples AF having compositions shown in Table 1. In addition, the numerical value in a table shows volume%. Then at room temperature a friction material mixture product, after pre-molded under a pressure 400 kg / cm 2, temperature of 0.99 ° C., heated compression molding for 10 minutes at a pressure 400 kg / cm 2, then carried out a heat treatment at a temperature 200 ° C. 4 hours Example Friction materials A to F were produced.
【００１７】〔比較例ａ，ｂ〕実施例において、カシュ
ーポリマーとフルフラールの混合液を用いない以外は同
様にして表１に示す組成の比較例ａ，ｂの摩擦材用組成
物を得た。これを実施例と同様に成型、熱処理して比較
例ａ，ｂの摩擦材を作製した。[Comparative Examples a and b] The compositions for friction materials of Comparative Examples a and b having the compositions shown in Table 1 were obtained in the same manner as in Example except that the mixed liquid of cashew polymer and furfural was not used. This was molded and heat-treated in the same manner as in the example to produce the friction materials of comparative examples a and b.
【００１８】上記の方法により作製した実施例Ａ〜Ｆ及
び比較例ａ，ｂの摩擦材用組成物について粉塵の発生状
態、偏析状態を調査した結果を表２に示す。Table 2 shows the results of investigating the dust generation state and the segregation state of the friction material compositions of Examples A to F and Comparative Examples a and b produced by the above method.
【００１９】また、上記の方法により作製した実施例Ａ
〜Ｆ及び比較例ａ，ｂの摩擦材についてフルサイズダイ
ナモ試験機による摩擦摩耗試験（ＪＡＳＯ Ｃ４２７−
８３，Ｃ４０６−８２，イナーシャ５ｋｇｍｓ2）によ
りテストを行なった結果及びテスト後の摩擦材の亀裂発
生状況を調査した結果を表２に示す。尚、表中◎はたい
へん良好な状態、○は良好な状態、×は良くない状態で
あることを示す。Example A produced by the above method
-F and the friction materials of Comparative Examples a and b by a full size dynamo tester (JASO C427-
83, C406-82, inertia 5 kgms < 2 >), and Table 2 shows the results of an examination of the crack generation state of the friction material after the test. In the table, ⊚ indicates a very good state, ∘ indicates a good state, and x indicates a bad state.
【００２０】表２より、本発明実施例の摩擦材用組成物
は摩擦材料の粉塵、偏析の発生が少なく、また、本発明
実施例の摩擦材はフルサイズテストにおいても良好な摩
擦性能と強度を保持していることがわかる。一方、通常
の方法で作製された比較例ａの摩擦材用組成物は、粉
塵、偏析の発生が多く、これを用いて作製した摩擦材ａ
は良好な摩擦性能を示すものの、亀裂発生があり、強度
が良好ではない。また、カシューポリマーのみを使用し
フルフラールを使用しない方法で作製された比較例ｂの
摩擦材用組成物は、粉塵、偏析の状態は良好であった
が、これを用いて作製した摩擦材ｂは高温時の摩擦性能
が良好ではなく、亀裂が発生し強度も良好ではない。From Table 2, it can be seen that the composition for friction material of the present invention has less dust and segregation of the friction material, and the friction material of the present invention has good friction performance and strength even in the full size test. You can see that it holds. On the other hand, the friction material composition of Comparative Example a produced by the usual method has a large amount of dust and segregation, and the friction material a produced using this composition
Shows good friction performance, but cracks occur and the strength is not good. Further, the composition for friction material of Comparative Example b prepared by the method using only cashew polymer and not using furfural had good dust and segregation state, but the friction material b prepared using this composition was The friction performance at high temperature is not good, and cracks occur and the strength is not good.
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【表２】 [Table 2]
【００２３】[0023]
【発明の効果】以上のように本発明の摩擦材用組成物の
製造方法は、アラミド繊維等の有機繊維やロックウール
等の無機繊維、銅繊維等の金属繊維、フェノール樹脂等
の結合材及び黒鉛、硫酸バリウム等の充填材から成るも
ので、組成物の少なくとも一部にカシューポリマーとフ
ルフラールの混合液を含ませた結果、粉塵の発生及び偏
析を防止することができ、また本発明の摩擦材の製造方
法は、上記組成物を用いた結果、機械的強度、摩擦性能
を向上させることができるもので、本発明によれば、デ
ィスクブレーキパッド、ブレーキライニング等に好適に
使用できる摩擦材用組成物又は摩擦材を得ることができ
る。Industrial Applicability As described above, the method for producing the friction material composition of the present invention comprises the organic fiber such as aramid fiber, the inorganic fiber such as rock wool, the metal fiber such as copper fiber, the binder such as phenol resin and the like. It is composed of a filler such as graphite and barium sulfate, and as a result of including a mixed solution of cashew polymer and furfural in at least a part of the composition, it is possible to prevent generation of dust and segregation, and also the friction of the present invention. As a result of using the above composition, the method for producing a material can improve mechanical strength and friction performance. According to the present invention, a friction material suitable for a disc brake pad, a brake lining, etc. A composition or friction material can be obtained.
───────────────────────────────────────────────────── 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 Ａ Ｆターム(参考） 3J058 BA61 BA78 CA42 FA01 GA02 GA07 GA20 4F071 AA41 AA74 AB30 AC04 AD01 AF13 AF28 BB12 BC07 4J002 AF02X CC021 CC181 CK011 CL06Y DA027 DA076 DB006 DE147 DG017 DJ007 DL006 DM006 EE018 FA04Y FA046 FD01Y FD016 FD017 FD148 GT00 4J033 CA04 CB23 HB04 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) F16D 69/02 F16D 69/02 AF term (reference) 3J058 BA61 BA78 CA42 FA01 GA02 GA07 GA20 4F071 AA41 AA74 AB30 AC04 AD01 AF13 AF28 BB12 BC07 4J002 AF02X CC021 CC181 CK011 CL06Y DA027 DA076 DB006 DE147 DG017 DJ007 DL006 DM006 EE018 FA04Y FA046 FD01Y FD016 FD017 FD148 GT00 4J033 CA04 CB23 HB04
Claims (3)
物に対し、カシューポリマーとフルフラール（化学式Ｃ
4Ｈ3Ｏ・ＣＨＯ）の混合液を組成物全体の１〜１２体積
％の含有量になるように混合することを特徴とする摩擦
材用組成物の製造方法。1. A cashew polymer and furfural (formula C) for a mixture of a fiber component, a binder component and a filler component.
A method for producing a friction material composition, characterized in that a mixed liquid of ( 4 H 3 O.CHO) is mixed so as to have a content of 1 to 12% by volume of the entire composition.
比率（カシューポリマー／フルフラール）が、７０／３
０〜８５／１５である請求項１に記載の摩擦材用組成物
の製造方法。2. The volume ratio of cashew polymer to furfural (cashew polymer / furfural) is 70/3.
It is 0-85 / 15, The manufacturing method of the composition for friction materials of Claim 1.
摩擦材用組成物を得た後、該摩擦材用組成物を成型、熱
処理することを特徴とする摩擦材の製造方法。3. A method for producing a friction material, which comprises obtaining the composition for friction material by the production method according to claim 1 or 2, and then molding and heat treating the composition for friction material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003011870A JP2003286476A (en) | 2003-01-21 | 2003-01-21 | Method for producing friction material composition and method for producing friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003011870A JP2003286476A (en) | 2003-01-21 | 2003-01-21 | Method for producing friction material composition and method for producing friction material |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11411395A Division JPH08284991A (en) | 1995-04-17 | 1995-04-17 | Composition for friction material and friction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003286476A true JP2003286476A (en) | 2003-10-10 |
Family
ID=29244378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003011870A Pending JP2003286476A (en) | 2003-01-21 | 2003-01-21 | Method for producing friction material composition and method for producing friction material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006273968A (en) * | 2005-03-29 | 2006-10-12 | Nisshinbo Ind Inc | Method of producing friction material |
| JP2010202732A (en) * | 2009-03-02 | 2010-09-16 | Akebono Brake Ind Co Ltd | Friction adjusting material and method of manufacturing the same |
| WO2022249879A1 (en) * | 2021-05-28 | 2022-12-01 | 株式会社Adeka | Composition, method for producing cured product, and cured product |
-
2003
- 2003-01-21 JP JP2003011870A patent/JP2003286476A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006273968A (en) * | 2005-03-29 | 2006-10-12 | Nisshinbo Ind Inc | Method of producing friction material |
| JP2010202732A (en) * | 2009-03-02 | 2010-09-16 | Akebono Brake Ind Co Ltd | Friction adjusting material and method of manufacturing the same |
| WO2022249879A1 (en) * | 2021-05-28 | 2022-12-01 | 株式会社Adeka | Composition, method for producing cured product, and cured product |
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