JPH11246845A - Dry friction material - Google Patents
Dry friction materialInfo
- Publication number
- JPH11246845A JPH11246845A JP4955898A JP4955898A JPH11246845A JP H11246845 A JPH11246845 A JP H11246845A JP 4955898 A JP4955898 A JP 4955898A JP 4955898 A JP4955898 A JP 4955898A JP H11246845 A JPH11246845 A JP H11246845A
- Authority
- JP
- Japan
- Prior art keywords
- water
- friction material
- water repellent
- dry friction
- repellent
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ブレーキなどに用
いる乾式摩擦材に関し、特に発進時や制動時にブレーキ
を使用した際に、吸湿に原因する異常音や異常効きが発
生しないようにした乾式摩擦材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry friction material used for a brake or the like, and more particularly to a dry friction material which prevents abnormal sound or abnormal effect due to moisture absorption when the brake is used at the time of starting or braking. About materials.
【０００２】[0002]
【従来の技術】主としてブレーキなどに用いる乾式摩擦
材（以下、簡単のために単に「摩擦材」ということあ
る）は、最近耐フェード性の向上、高速効力の向上のた
めに、摩擦材の気孔率が１０〜３０％と高いものを使用
するようになっている。ところで、そのために、洗車、
水溜まりを通過などにより、摩擦材のが水に濡れたり、
夜間屋外に車両を止めておくことにより、摩擦材がその
気孔中に水分を吸収する。そして、その水分を吸った摩
擦材は、その水が乾く過程でブレーキ時の停止直前、概
ね５ｋｍ／ｈ以下の時、又はオートマッチク車における
発進時、すなわちブレーキペタルを踏み、Ｄレンジに入
れてブレーキペタルを緩めてブレーキが完全に開放され
る途中において、クリープ力でブレーキが引きずられて
微速で発進中に、低周波異音が出る。この低周波異音は
「クリープグー音」ともいわれ、不快感がするので嫌わ
れているものである。この低周波異音は、摩擦材の気孔
率が大きい程多くの水を吸収するので大きくなる。ま
た、摩擦材が吸湿すると、ブレーキ時にスキール音が発
生したり、あるいは摩擦係数が高くなり過ぎて、異常効
きが発生するなどの問題がある。2. Description of the Related Art Dry friction materials (hereinafter, simply referred to as "friction materials" for the sake of simplicity) mainly used for brakes and the like have recently been used for improving the fade resistance and the high-speed effect. Those having a high rate of 10 to 30% are used. By the way, for that,
The friction material gets wet with water by passing through a puddle, etc.
By keeping the vehicle outdoors at night, the friction material absorbs moisture in its pores. Then, the friction material that has absorbed the moisture is put into the D range immediately before stopping at the time of braking, approximately 5 km / h or less, or at the time of starting in an automatch vehicle, that is, stepping on the brake petal, that is, in the process of drying the water. When the brake pedal is loosened and the brake is completely released, the creep force causes the brake to be dragged and a low-frequency noise is generated while starting at a very low speed. This low frequency noise is also called "creep goo" and is disliked because it causes discomfort. The low-frequency noise is increased because the larger the porosity of the friction material, the more water is absorbed. Further, when the friction material absorbs moisture, there is a problem that a squealing noise is generated at the time of braking, or a friction coefficient becomes too high and an abnormal effect is generated.
【０００３】また、有機繊維、無機繊維、金属線、充填
材及び結合材とからなる摩擦材本体を撥水材で含浸した
乾式摩擦材とすることが提案された（特開平４−２３４
４７９号公報）。そこで用いる撥水材としては、撥水性
を有し、且つ摩擦特性を阻害しないものが好ましいとさ
れ、シリコン油、フッ素樹脂などが用いることができる
とされている。Further, it has been proposed to use a dry friction material in which a friction material body composed of organic fibers, inorganic fibers, metal wires, fillers and binders is impregnated with a water-repellent material (Japanese Patent Laid-Open No. 4-234).
No. 479). As the water repellent material used therefor, it is preferable that the material has water repellency and does not impair the friction characteristics, and it is said that silicone oil, fluororesin, or the like can be used.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、摩擦熱
でフッ素樹脂が熱分解するため、その効果は十分ではな
かった。本発明は、乾式摩擦材において、十分な撥水性
を有し、且つ摩擦特性を阻害しない特性をもつ乾式摩擦
材を提供することを目的とするものである。However, since the fluororesin is thermally decomposed by frictional heat, the effect is not sufficient. SUMMARY OF THE INVENTION An object of the present invention is to provide a dry friction material having sufficient water repellency and characteristics that do not impair the friction characteristics.
【０００５】本発明は、下記の手段により前記の課題を
解決した。 （１）繊維状体、結合材及び摩擦調整剤とを含む乾式摩
擦材において、微粉末状黒鉛を混合した撥水剤により撥
水処理されてなることを特徴とする乾式摩擦材。 （２）撥水剤がフッ素ポリマーであることを特徴とする
前記（１）記載の乾式摩擦材。 （３）撥水剤、微粉末状黒鉛及び水もしくは有機溶剤と
の混合物により撥水処理されてなることを特徴とする前
記（１）又は（２）に記載の乾式摩擦材。 （４）撥水剤、微粉末状黒鉛及び水もしくは有機溶剤と
の混合物が、７重量％以下の撥水剤と３０重量％以下の
微粉末状黒鉛を含むものであることを特徴とする前記
（３）に記載の乾式摩擦材。[0005] The present invention has solved the above-mentioned problems by the following means. (1) A dry friction material comprising a fibrous body, a binder and a friction modifier, wherein the dry friction material is subjected to a water repellent treatment with a water repellent mixed with fine powdered graphite. (2) The dry friction material according to the above (1), wherein the water repellent is a fluoropolymer. (3) The dry friction material according to the above (1) or (2), wherein the dry friction material is subjected to a water-repellent treatment with a mixture of a water-repellent agent, fine powdered graphite, and water or an organic solvent. (4) The mixture according to (3), wherein the mixture of the water repellent, the fine powdered graphite, and water or an organic solvent contains 7% by weight or less of the water repellent and 30% by weight or less of the fine powdered graphite. The dry friction material according to (1).
【０００６】[0006]
【発明の実施の形態】本発明は、繊維状体、結合材樹
脂、摩擦調整剤からなる摩擦材を形成した後、その摩擦
材に微粉末状黒鉛を混合した撥水剤により撥水処理する
ことにより製造することができ、具体的には微粉末状黒
鉛と撥水剤とを含浸させることにより製造することがで
きる。これらの含浸は、微粉末状黒鉛と撥水剤とを水に
分散させて混合させたものを用いて行うのが好ましい。
そして、摩擦材の平均気孔径が約０．４μｍであるた
め、微粉末状黒鉛としては、その平均粒径が０．３μｍ
以下であることが好ましい。微粉末状黒鉛の具体例とし
ては、黒鉛の微粉末を水に分散させた日本黒鉛工業社製
スーパーコロハイト＃１６等を用いることができる。そ
の混合物中の微粉末状黒鉛の濃度としては、３０重量％
以下とするが、１０〜２０％（重量）とすることが好ま
しい。分散液の調製には必要により界面活性剤を添加す
ることができる。DETAILED DESCRIPTION OF THE INVENTION In the present invention, a friction material comprising a fibrous body, a binder resin and a friction modifier is formed, and then subjected to a water repellent treatment with a water repellent obtained by mixing fine powder graphite with the friction material. Specifically, it can be produced by impregnating fine powdered graphite and a water repellent. These impregnations are preferably performed using a mixture of fine powdered graphite and a water repellent dispersed in water and mixed.
Since the average pore diameter of the friction material is about 0.4 μm, the average particle diameter of the fine powder graphite is 0.3 μm.
The following is preferred. As a specific example of the fine powdered graphite, Super Coro Height # 16 manufactured by Nippon Graphite Industry Co., Ltd. in which fine graphite powder is dispersed in water can be used. The concentration of the fine powdered graphite in the mixture was 30% by weight.
Although it is the following, it is preferable to be 10 to 20% (weight). A surfactant can be added as needed to prepare the dispersion.
【０００７】また、撥水剤としては、周知のフッ素樹脂
撥水剤やシリコーン撥水剤、脂肪酸アマイド、アルキル
エチレン尿素などがあるが、実際の適用では、微粉末状
黒鉛と共に水に分散させて使用する関係で、分散が容易
なフッ素樹脂撥水剤の方が良い。フッ素樹脂撥水剤とし
ては、例えば旭硝子社製フッ素系ポリマーＬＳ３１７、
アサヒガードなどを用いることができる。アサヒガード
は、化学式Ａで表わされる。また、シリコーン撥水剤と
しては、周知の種々のものを使用することができるが、
例えばＰｏｌｏｎ ＭＲなどが挙げられる。Ｐｏｌｏｎ
ＭＲは、化学式Ｂで表わされる物質である。その混合
物中の撥水剤の濃度としては、７重量％以下とするがよ
いが、１〜５％（重量）とすることが好ましい。Examples of the water repellent include well-known fluorine resin water repellents, silicone water repellents, fatty acid amides, alkylethylene ureas, and the like. Due to the use, a fluororesin water repellent which is easy to disperse is better. As a fluorine resin water repellent, for example, a fluoropolymer LS317 manufactured by Asahi Glass Co., Ltd.,
Asahi guard or the like can be used. Asahigard is represented by Chemical Formula A. As the silicone water repellent, various well-known silicone water repellents can be used.
For example, Polon MR is mentioned. Polon
MR is a substance represented by Chemical Formula B. The concentration of the water repellent in the mixture is preferably 7% by weight or less, but is preferably 1 to 5% (by weight).
【０００８】[0008]
【化１】 Embedded image
【０００９】[0009]
【化２】 Embedded image
【００１０】摩擦材への微粉末状黒鉛等の含浸は、摩擦
材の製造工程における仕上げ工程の後に、フッ素樹脂撥
水剤と微粉末状黒鉛と水との分散混合物を含浸させる。
ただし、含浸を仕上げ工程の前に行ってもよい。その含
浸法としては、真空含浸法、塗布、どぶづけなどの手段
を用いることができるが、摩擦材内部への含浸効率が良
い点から、真空含浸法が好ましい。その含浸後に、１０
０℃で１時間乾燥処理する。The impregnation of the friction material with fine powdered graphite or the like is performed by impregnating a dispersion mixture of a fluororesin water repellent, fine powdered graphite, and water after the finishing step in the friction material manufacturing process.
However, the impregnation may be performed before the finishing step. As the impregnation method, means such as a vacuum impregnation method, coating, and doweling can be used, but the vacuum impregnation method is preferable because the impregnation efficiency inside the friction material is good. After its impregnation, 10
Dry for 1 hour at 0 ° C.
【００１１】含浸工程の後に、撥水剤の作用を十分に行
わせるために、常法により撥水剤の拡散処理及びフィル
ム形成処理をする。撥水剤の拡散処理は、１０５〜１２
０℃、３０〜６０分間の範囲で行わせることができ、例
えば１１０℃、４５分間とすることができる。フィルム
形成処理は、１２０〜１５０℃、０．５〜２時間の範囲
で行わせることができ、例えば１３０℃、１時間とする
ことができる。これらの加熱に際しては、均一な加熱が
できるように加熱炉を用いることが好ましい。摩擦材の
気孔内部で、撥水剤は拡散処理において、例えばその分
子が気孔表面に移動し、続くフィルム形成処理におい
て、撥水剤の分子が相互に結合して撥水性のフィルムを
形成することにより、気孔内部全体に撥水性が付与され
る。After the impregnating step, in order to sufficiently perform the function of the water repellent, the water repellent is subjected to a diffusion treatment and a film forming treatment by a conventional method. The diffusion treatment of the water repellent is 105 to 12
The reaction can be performed at 0 ° C. for 30 to 60 minutes, for example, at 110 ° C. for 45 minutes. The film forming treatment can be performed at 120 to 150 ° C. for 0.5 to 2 hours, for example, at 130 ° C. for 1 hour. At the time of these heatings, it is preferable to use a heating furnace so that uniform heating can be performed. Inside the pores of the friction material, the water-repellent agent undergoes a diffusion process, for example, its molecules move to the pore surface, and in a subsequent film forming process, the molecules of the water-repellent agent bond with each other to form a water-repellent film. Thereby, water repellency is imparted to the entire inside of the pore.
【００１２】図１は、ディスクブレーキ用ディスクパッ
トの製造工程を示し、板金プレスにより所定の形状に成
形され、脱脂処理及びプライマー処理が施され、そして
接着剤が塗布された裏金と、耐熱性有機繊維や無機繊
維、金属繊維等の繊維材料と、無機・有機充填材、摩擦
調整材及び熱硬化性樹脂バインダ等の粉末原料とを配合
し、攪拌により十分に均質化した原材料を常温にて所定
の圧力で成形（予備成形）して作製した予備成形体と
を、熱成形工程において所定の温度及び圧力で熱成形し
て両部材を一体に固着し、アフタキュアを行い、最終的
に仕上げ処理を施すそれまでの工程は従来法と同一であ
る。FIG. 1 shows a manufacturing process of a disk pad for a disk brake, which is formed into a predetermined shape by a sheet metal press, subjected to a degreasing process and a primer process, and is coated with an adhesive. Fiber materials such as fibers, inorganic fibers, and metal fibers are mixed with powdered raw materials such as inorganic and organic fillers, friction modifiers, and thermosetting resin binders. In the thermoforming step, the preformed body formed by preforming (preforming) is thermoformed at a predetermined temperature and pressure, and the two members are fixed together, after-cured, and finally finished. The process up to that point is the same as in the conventional method.
【００１３】前記した耐熱性有機繊維としては、例えば
芳香族ポリアミド繊維、耐炎性アクリル繊維が挙げら
れ、無機繊維としては例えばチタン酸カリウム繊維やア
ルミナ繊維等のセラッミク繊維、ガラス繊維、カーボン
繊維、ロックウール等が挙げられ、また金属繊維として
は例えば銅繊維やスチール繊維が挙げられる。無機充填
材としては、例えば銅やアルミニウム、亜鉛等の金属粒
子、バームキュライトやマイカ等の鱗片状無機物、硫酸
バリウムや炭酸カルシウム等の粒子が挙げられ、有機充
填材としては、例えば合成ゴムやカシュー樹脂等が挙げ
られる。熱硬化性樹脂バインダとしては、例えばフェノ
ール樹脂（ストレートフェノール樹脂、ゴム等による各
種変性フェノール樹脂を含む）、メラミン樹脂、エポキ
シ樹脂、シアン酸エステル樹脂等を挙げることができ
る。また、摩擦調整剤としては、例えばアルミナやシリ
カ、マグネシア、ジルコニア、酸化クロム、石英等の金
属酸化物等を、固体潤滑剤としては、例えばグラファイ
トや二硫化モリブデン等を挙げることができる。Examples of the above-mentioned heat-resistant organic fibers include aromatic polyamide fibers and flame-resistant acrylic fibers. Examples of the inorganic fibers include ceramic fibers such as potassium titanate fibers and alumina fibers, glass fibers, carbon fibers, and rock fibers. Wool and the like can be mentioned, and examples of the metal fiber include a copper fiber and a steel fiber. Examples of the inorganic filler include metal particles such as copper, aluminum, and zinc, scaly inorganic substances such as balm curite and mica, and particles such as barium sulfate and calcium carbonate.Examples of the organic filler include synthetic rubber and Cashew resin and the like. Examples of the thermosetting resin binder include phenol resins (including various modified phenol resins such as straight phenol resins and rubbers), melamine resins, epoxy resins, and cyanate ester resins. Examples of the friction modifier include metal oxides such as alumina and silica, magnesia, zirconia, chromium oxide, and quartz. Examples of the solid lubricant include graphite and molybdenum disulfide.
【００１４】[0014]
【実施例】以下、実施例により本発明を具体的に説明す
るが、本発明はこれらのみに限定されるものではない。EXAMPLES The present invention will be described below in more detail with reference to examples, but the present invention is not limited to these examples.
【００１５】実施例１ セラミック繊維、銅繊維、アラミドパルプ、摩擦調整
剤、潤滑材及びフェノール樹脂の原材料を第１表に示す
割合で配合し、攪拌して混合し、予備成形する。一方、
板金プレスにより裏金を形成し、脱脂し、プライマー処
理し、それに接着材を塗布し、その塗布面に前記の予備
成形体を乗せ、加圧加熱して熱成形する。この熱成形し
たものを仕上げ工程に送る。なお、フェノール樹脂の量
を変えて気孔率の異なる３種の試料Ａ，Ｂ，Ｃ（ディス
クパット）を作製した。EXAMPLE 1 Raw materials of ceramic fiber, copper fiber, aramid pulp, friction modifier, lubricant and phenol resin are blended in the proportions shown in Table 1, stirred, mixed and preformed. on the other hand,
A back metal is formed by a sheet metal press, degreased, treated with a primer, an adhesive is applied thereto, the preform is placed on the applied surface, and the preform is thermoformed by heating under pressure. This thermoformed product is sent to a finishing process. In addition, three types of samples A, B, and C (disk pads) having different porosity were prepared by changing the amount of the phenol resin.
【００１６】[0016]
【表１】 [Table 1]
【００１７】次に撥水処理工程において、フッ素系撥水
剤（旭硝子社製、フッ素系ポリマーＬＳ３１７）と、微
粉末状黒鉛（日本黒鉛工業社製、スーパーコロハイト＃
１６）を下記の割合で水に（もしくは有機溶剤）混合し
て分散させた液に１０〜１８０秒間浸し、真空含浸法に
よりその内部に含浸させる。それを１００℃で１時間乾
燥し、１１０℃で４５分間加熱して拡散処理する。さら
に１３０℃で１時間加熱することにより、撥水剤のフィ
ルムが形成されるようにする。この撥水処理において、
分散液におけるフッ素系ポリマーの濃度を０．０５〜５
％の範囲で、また微粉末状黒鉛の濃度を０〜３０％の範
囲で種々変えてそれぞれ試料を作製した。各試料の製造
に使用したフッ素系ポリマー及び微粉末状黒鉛の濃度な
どを第２表に示す。Next, in the water-repellent treatment step, a fluorine-based water-repellent agent (manufactured by Asahi Glass Co., Ltd., fluorinated polymer LS317) and fine powder graphite (manufactured by Nippon Graphite Industry Co., Ltd., Super Corohite #)
16) is immersed in a liquid in which water (or an organic solvent) is mixed and dispersed at the following ratio for 10 to 180 seconds, and impregnated therein by a vacuum impregnation method. It is dried at 100 ° C. for 1 hour, and heated at 110 ° C. for 45 minutes for diffusion treatment. Further, by heating at 130 ° C. for 1 hour, a film of the water repellent is formed. In this water repellent treatment,
The concentration of the fluoropolymer in the dispersion is 0.05 to 5
%, And the concentration of the fine powdered graphite was variously changed in the range of 0 to 30% to prepare samples. Table 2 shows the concentration of the fluorine-based polymer and the fine powdered graphite used in the production of each sample.
【００１８】（モーニングシックネス試験）新品ロータ
ーを用い、前記試料を取り付け、１０００ｋｍ走行して
ブレーキパットとローターの十分な摺り合わせが得られ
た後に、その車両を１５℃の室温、湿度９５％（ＲＨ）
の環境室に１２時間放置し、その後微速で発進、停止を
繰り返して、発進時のクリープグー音の発生について、
官能試験により試験した。一般的にはクリープグー音の
方が、ブレーキ時の異音より大であるため、クリープグ
ー音発生について試験した。試験結果については、次の
４段階で表わす。 中 ： 小 ： 微小： 無 ： 試験結果を第２表に示す。表中、クリープグー音が
「無」又は「微小」のものは許容できるレベルであり、
「小」又は「中」のものは許容でき難いレベルである。(Morning Thickness Test) Using a new rotor, the sample was mounted, and after running 1000 km and sufficient sliding of the brake pad and the rotor was obtained, the vehicle was brought to room temperature of 15 ° C. and humidity of 95% (RH). )
Left in the environment room for 12 hours, then start and stop at a very slow speed, about the generation of creep goo noise at the start,
Tested by sensory test. In general, the creep goo sound was louder than the abnormal noise during braking, so the creep goo sound was tested. The test results are expressed in the following four stages. Medium: Small: Micro: None: Test results are shown in Table 2. In the table, those with "no" or "small" creep goo are acceptable levels,
"Small" or "medium" are unacceptable levels.
【００１９】[0019]
【表２】 [Table 2]
【００２０】第２表により次のことが分かる。 （１）比較例１〜４のいずれも、クリープグー音が
「小」もしくは「中」の許容できないレベルで発生し
た。 （２）実施例１〜１２のいずれも、クリープグー音が
「無」もしくは許容できる「微小」のレベルであった。The following can be seen from Table 2. (1) In all of Comparative Examples 1 to 4, the creep goo sound was generated at an unacceptable level of “small” or “medium”. (2) In all of Examples 1 to 12, the creep goo sound was at a level of “absent” or an acceptable “micro” level.
【００２１】[0021]
【発明の効果】本発明の乾式摩擦材は、その使用におい
て、低周波異音とスキール音を効果的に低減することが
できるとともに、異常効きの発生を防止することができ
る。特に、耐フェード性等の向上のために気孔率の高い
ものとした乾式摩擦材の場合においても、洗車や雨など
で摩擦材に水がかかったようなときや、朝のように乾式
摩擦材が水分を吸収し易い条件に置かれても、水による
影響を少なくし、低周波異音とスキール音の発生を少な
くする効果を発揮することができる。更に、撥水剤が熱
履歴により熱分解しても、微粉末状黒鉛は耐熱性が高
く、しかも水との接触で摩擦係数を下げる効果があるた
め、水の影響下で摩擦係数が上がることはなく、ブレー
キ時の異音や異常効きを効果的に防止できる。以上は、
ディスクブレーキ用ブレーキパットについて説明した
が、本発明はドラム用ブレーキライニング及びクラッチ
フェーシングにも適用できる。そして、ドラムブレーキ
においてはカックン効き、クラッチフェーシングにおい
てはジャダーに対してその効果が一層期待できる。The dry friction material of the present invention, when used, can effectively reduce low frequency abnormal noise and squeal noise, and can prevent abnormal effects from occurring. In particular, even in the case of dry friction materials with a high porosity to improve fade resistance, etc., when the friction materials are exposed to water due to car washing or rain, or as in the morning, dry friction materials are used. However, even if the condition is set so as to easily absorb water, the effect of reducing the influence of water and the generation of low frequency abnormal noise and squeal noise can be exhibited. In addition, even if the water repellent is thermally decomposed due to heat history, the fine powdered graphite has high heat resistance and has the effect of lowering the friction coefficient in contact with water, so the friction coefficient increases under the influence of water. However, abnormal noise and abnormal effects during braking can be effectively prevented. The above is
Although the brake pad for a disc brake has been described, the present invention can also be applied to a brake lining for a drum and a clutch facing. In the case of drum brakes, the effect is more effective against cockling, and in clutch facing, the effect is more expected for judder.
【図１】本発明の乾式摩擦材の製造工程の１例を示すフ
ローシートである。FIG. 1 is a flow sheet showing an example of a manufacturing process of a dry friction material of the present invention.
Claims (4)
む乾式摩擦材において、微粉末状黒鉛を混合した撥水剤
により撥水処理されてなることを特徴とする乾式摩擦
材。1. A dry friction material comprising a fibrous body, a binder and a friction modifier, wherein the dry friction material is subjected to a water-repellent treatment with a water-repellent agent mixed with fine powdered graphite.
徴とする請求項１記載の乾式摩擦材。2. The dry friction material according to claim 1, wherein the water repellent is a fluoropolymer.
機溶剤との混合物により撥水処理されてなることを特徴
とする請求項１又は請求項２に記載の乾式摩擦材。3. The dry friction material according to claim 1, wherein the dry friction material is subjected to a water repellent treatment with a mixture of a water repellent, fine powdered graphite, and water or an organic solvent.
機溶剤との混合物が、７重量％以下の撥水剤と３０重量
％以下の微粉末状黒鉛を含むものであることを特徴とす
る請求項３に記載の乾式摩擦材。4. A mixture of a water repellent, finely divided graphite and water or an organic solvent, wherein the mixture contains 7% by weight or less of a water repellent and 30% by weight or less of finely divided graphite. Item 4. A dry friction material according to item 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04955898A JP4021543B2 (en) | 1998-03-02 | 1998-03-02 | Dry friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04955898A JP4021543B2 (en) | 1998-03-02 | 1998-03-02 | Dry friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11246845A true JPH11246845A (en) | 1999-09-14 |
| JP4021543B2 JP4021543B2 (en) | 2007-12-12 |
Family
ID=12834541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04955898A Expired - Fee Related JP4021543B2 (en) | 1998-03-02 | 1998-03-02 | Dry friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4021543B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112940447A (en) * | 2021-01-29 | 2021-06-11 | 山东金麒麟股份有限公司 | Friction material for electric automobile, brake pad and preparation method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865599B (en) * | 2009-04-14 | 2012-05-30 | 相信Brake株式会社 | Raw material drying and mixing plant for molding automobile brake friction material |
-
1998
- 1998-03-02 JP JP04955898A patent/JP4021543B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112940447A (en) * | 2021-01-29 | 2021-06-11 | 山东金麒麟股份有限公司 | Friction material for electric automobile, brake pad and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4021543B2 (en) | 2007-12-12 |
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