JP2015052385A - Friction material for clutch - Google Patents
Friction material for clutch Download PDFInfo
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- JP2015052385A JP2015052385A JP2013186788A JP2013186788A JP2015052385A JP 2015052385 A JP2015052385 A JP 2015052385A JP 2013186788 A JP2013186788 A JP 2013186788A JP 2013186788 A JP2013186788 A JP 2013186788A JP 2015052385 A JP2015052385 A JP 2015052385A
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- friction material
- clutch
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- 239000002783 friction material Substances 0.000 title claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 41
- 239000011347 resin Substances 0.000 claims abstract description 33
- 229920005989 resin Polymers 0.000 claims abstract description 33
- 229920001971 elastomer Polymers 0.000 claims abstract description 32
- 239000005060 rubber Substances 0.000 claims abstract description 32
- 239000010410 layer Substances 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 9
- 239000002344 surface layer Substances 0.000 claims abstract description 8
- 238000005979 thermal decomposition reaction Methods 0.000 claims abstract description 5
- 229910021397 glassy carbon Inorganic materials 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 9
- 229920000459 Nitrile rubber Polymers 0.000 claims description 8
- 239000012783 reinforcing fiber Substances 0.000 claims description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- 238000013007 heat curing Methods 0.000 abstract 1
- 239000003365 glass fiber Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000835 fiber Substances 0.000 description 7
- 239000011521 glass Substances 0.000 description 6
- 230000013011 mating Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000005011 phenolic resin Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 244000226021 Anacardium occidentale Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 235000020226 cashew nut Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- -1 for example Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007932 molded tablet Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 239000003826 tablet Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
Images
Abstract
Description
本発明は、摩擦材、特に動力伝達を断接する自動車、産業機械のクラッチに使用されるクラッチ用摩擦材に関する。 The present invention relates to a friction material, and more particularly to a friction material for a clutch used for a clutch of an automobile or an industrial machine that connects and disconnects power transmission.
従来の動力伝達システム、特に自動車の駆動系に使用される乾式クラッチは、自動車の高性能化に伴い、安定した摩擦特性と、快適性の両立が求められる。 Conventional power transmission systems, particularly dry clutches used in automobile drive systems, are required to have both stable friction characteristics and comfort as the automobile performance increases.
乾式クラッチに用いられる摩擦材は、摩擦材と相手面との係合により発生する摩擦熱によって摩擦材成分の樹脂が溶融し、摩擦材と相手側の間に樹脂皮膜として滞在して係合時の伝達トルクを不安定にするフェード現象を生じる。 The friction material used in the dry clutch melts the friction material resin due to the frictional heat generated by the engagement between the friction material and the mating surface, and stays as a resin film between the friction material and the mating side during engagement. This causes a fade phenomenon that destabilizes the transmission torque.
また、摩擦材と相手面とのなじみが悪い場合には、搭乗者に不快感を与えるジャダーと呼ばれる振動や、鳴きと呼ばれる異音が生じることがある。 Further, when the familiarity between the friction material and the mating surface is poor, vibration called judder that gives the passenger discomfort or abnormal noise called squeal may occur.
このようなフェード現象、振動および／または鳴きは、乾式クラッチで生じ易いことが分かっている。 It has been found that such fade phenomena, vibrations and / or squeals are likely to occur with dry clutches.
特許文献１には、樹脂をバインダーとして使用し、繊維を紡織した基材を予備成形した後に、略クラッチフェーシング状成形体を形成し、この成形体にゴムを含浸するクラッチフェーシング方法が開示されている。 Patent Document 1 discloses a clutch facing method in which a resin is used as a binder, a base material on which fibers are spun is preformed, a substantially clutch facing-shaped molded body is formed, and the molded body is impregnated with rubber. Yes.
特許文献２には、弾性率が６０００ｋｇｆ／ｍｍ２以下の炭素繊維と引張強度が２００ｋｇｆ／ｍｍ２以上の炭素繊維の炭素束を合撚した紐を基材繊維とし、この紐にフェノール樹脂、ゴムバインダを含浸し、巻装したものをスパイラル状に巻き取り、加熱成形してクラッチフェーシングを製造する方法が開示されている。 In Patent Document 2, a string obtained by twisting a carbon bundle of carbon fiber having an elastic modulus of 6000 kgf / mm 2 or less and a carbon fiber having a tensile strength of 200 kgf / mm 2 or more is used as a base fiber, and a phenol resin or a rubber binder is used as the string. A method of manufacturing a clutch facing by winding up a wound material in a spiral shape and heat-molding it is disclosed.
特許文献３には、クラッチフェーシングの製造の製造に使用されるガラス繊維ヤーンをリング状に巻き取るための巻取り機が開示されている。 Patent Document 3 discloses a winder for winding a glass fiber yarn used for manufacturing a clutch facing into a ring shape.
上記特許文献１〜３に記載されているように、乾式クラッチ用摩擦材に関する発明は、これまで多数提案されているが、いずれの発明も摩擦材の回転強度および耐摩擦性を改善せんとするものであった。 As described in Patent Documents 1 to 3 above, many inventions related to friction materials for dry clutches have been proposed so far, but all inventions are intended to improve the rotational strength and friction resistance of friction materials. It was a thing.
以上に鑑み、本発明者は、フェード現象、振動および／または鳴きのような問題を解決せんと、クラッチ用摩擦材について鋭意研究を進めたところ、上記のような従来のクラッチ用摩擦材の問題も解決できる摩擦材を発明するに至ったものである。 In view of the above, the present inventor has conducted extensive research on the friction material for clutches and has not solved the problems such as fade phenomenon, vibration and / or squeal. The inventors have invented a friction material that can also solve the above problem.
よって、本発明の目的は、上記の様な伝達トルクが安定し、さらに車体振動および／または鳴きの原因となる摩擦振動が発生しにくいクラッチ用摩擦材を提供することにある。 Accordingly, it is an object of the present invention to provide a friction material for a clutch in which the transmission torque as described above is stable and frictional vibration that causes vehicle body vibration and / or squealing is less likely to occur.
本発明の１つの様相によれば、配合ゴム・母材と（母材はゴムと樹脂とを含む）、 前記配合ゴム・母材の上に形成され、前記母材内の前記熱硬化性樹脂が熱硬化することによって、生じたガラス状炭素構造またはグラファイト構造の樹脂を含む中間層と、前記中間層の上に形成され、前記母材内のゴム・樹脂成分が熱分解することによって生じた熱分解生成物を含む最外表面層とを備える、クラッチ用摩擦材が提供される。 According to one aspect of the present invention, a blended rubber / base material (the base material includes rubber and resin), the thermosetting resin formed on the blended rubber / base material and in the base material Is generated by thermally decomposing the rubber / resin component in the base material formed on the intermediate layer and an intermediate layer containing a resin having a glassy carbon structure or a graphite structure. There is provided a friction material for a clutch comprising an outermost surface layer containing a thermal decomposition product.
前記配合ゴム・母材は、アクリロニトリルーブタジエンゴム（ＮＢＲ）、スチレンーブタジエンゴム（ＳＢＲ）およびそれらの組み合わせを含有する配合ゴム成分と、補強繊維と、熱硬化性樹脂と、摩擦特性調整材とを含むことができる。 The blended rubber / base material includes a blended rubber component containing acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR) and a combination thereof, a reinforcing fiber, a thermosetting resin, and a friction characteristic adjusting material. Can be included.
本発明に係わる摩擦材によれば、配合ゴム・樹脂層が熱変性された層を外側に有し、この層は、使用初期でも使用時間の長い摩擦材と同様な安定した摩擦特性を有するため、摩擦振動を発生しにくく、摩擦振動の結果生じるクラッチの鳴きやジャダーの発生を低減できる。 According to the friction material of the present invention, the compounded rubber / resin layer has a heat-modified layer on the outside, and this layer has stable friction characteristics similar to the friction material having a long use time even in the initial use. Therefore, it is difficult to generate frictional vibration, and it is possible to reduce the occurrence of clutch noise and judder as a result of frictional vibration.
以下、添付図面を参照し、本発明の実施形態について説明するが、この実施形態は、単に発明を説明するためのものにすぎず、発明は、図面に示し、以下詳細な説明に示す実施形態だけに限定されるものではない。 DETAILED DESCRIPTION Embodiments of the present invention will be described below with reference to the accompanying drawings. However, the embodiments are merely for explaining the invention, and the embodiments are shown in the drawings and are described in the detailed description below. It is not limited to only.
図１を参照すると、この図には、本発明に係わる摩擦材の厚さ方向に断面が示されており、この摩擦材１０は、摩擦材のベースとなる、配合ゴム・樹脂母材２０と、配合ゴム・樹脂母材２０の上に形成された中間層３０と、この中間層３０の上に形成された最外表面層４０とを備える。
Referring to FIG. 1, this figure shows a cross section in the thickness direction of the friction material according to the present invention. This
配合ゴム・樹脂母材２０は、アクリロニトリルーブタジエンゴム（ＮＢＲ）、スチレンーブタジエンゴム（ＳＢＲ）単独およびそれらの組み合わせを含む、配合ゴム材料（配合ゴム）を主成分として含み、更に補強繊維、熱硬化性樹脂、摩擦係数調整剤、加硫剤等の配合剤を更に含む。
The compound rubber /
補強繊維として、天然パルプ、合成繊維、例えば、アラミド繊維、カーボンファイバーのような炭素繊維、ガラス繊維または金属繊維等を単独またはこれらの２種以上を組み合わせを使用できる。これら繊維は、チョップ状、ヤーン状、リボン状、不織布状またはこれらの組み合わせのいずれでもよく、これら繊維が、チョップ状となっている場合には、繊維は、配合ゴム材および配合材に対し均一に分布することが好ましい。 As the reinforcing fiber, natural pulp, synthetic fiber, for example, carbon fiber such as aramid fiber or carbon fiber, glass fiber, metal fiber, or the like can be used alone or in combination of two or more thereof. These fibers may be chopped, yarn-shaped, ribbon-shaped, non-woven fabric, or a combination thereof. When these fibers are chopped, the fibers are uniform with respect to the compounded rubber material and compounded material. It is preferable to be distributed.
熱硬化性樹脂として、フェノール系樹脂、エポキシ樹脂、メラミン樹脂、フタレート樹脂を単独またはこれらの２種以上を組み合わせて使用できる。 As the thermosetting resin, a phenol resin, an epoxy resin, a melamine resin, or a phthalate resin can be used alone or in combination of two or more thereof.
摩擦係数調整材として、炭素粒子、例えばコークス、グラファイト、無機粉末物質、例えば活性炭、珪藻土、タルク、グラファイト、有機粉末物質、例えばカシューナッツ粉を単独またはその組み合わせて使用できる。 As the friction coefficient adjusting material, carbon particles such as coke, graphite, inorganic powder materials such as activated carbon, diatomaceous earth, talc, graphite, organic powder materials such as cashew nut powder can be used alone or in combination.
配合ゴム・樹脂母材には、ゴム成分を硬化するための加硫成分が更に含まれる。 The compounded rubber / resin base material further includes a vulcanized component for curing the rubber component.
図２のフローチャートに示されるように、本発明の一様相に係わる摩擦材は、次のように製造される。アクリロニトリルーブタジエンゴム（ＮＢＲ）と、フェノール樹脂と、繊維と、摩擦調整材とを混合し、加圧成形することによって、硬化（キュア）させ、リング状の配合ゴム・樹脂母材２０を製造し、この配合ゴム・樹脂母材２０の少なくとも一方の面を研磨し、リング状の摩擦材１０を製造した。このように製造された摩擦材を２枚の金属板の間に挟持した状態で加熱炉に装入し、加熱し、摩擦材１０を取り出した。その後、母材を切断し、断面の成分を分析したところ、母材には、成分の異なる２層が形成されていることが判明した。すなわち最も外側に位置する最外表面層４０と、その最外表面層４０と母材２０との間に位置する中間層３０とが形成されていることが判明した。
As shown in the flowchart of FIG. 2, the friction material according to the uniform phase of the present invention is manufactured as follows. Acrylonitrile-butadiene rubber (NBR), phenol resin, fiber, and friction modifier are mixed and cured by pressure molding to produce a ring-shaped compound rubber /
一方最外表面層４０と母材２０との間に位置する中間層３０に関し、成分分析をしたところ、母材に含まれていた熱硬化性樹脂成分が熱硬化し、ガラス状炭素構造を形成していたり、グラファイト構造になっていることが判った。
On the other hand, when the component analysis was performed on the
また、上記のように加熱処理をした、本発明の摩擦材と相手面とから構成された乾式クラッチを製造し、車両に実装し、走行テストを実行した結果、加熱処理品は、未処理品と比較して、クラッチから伝達されるトルクが非常に安定しており、ジャッダーや鳴きなどの異音が生じることがないことが判った。 In addition, as a result of manufacturing a dry clutch composed of the friction material of the present invention and the mating surface that has been heat-treated as described above, mounted on a vehicle, and running a test, the heat-treated product is an untreated product. The torque transmitted from the clutch is much more stable than that of the engine, and it has been found that no abnormal noise such as judder or squeal is generated.
本発明の摩擦材は、乾式クラッチに使用するものとして記載したが、用途は乾式クラッチだけに限定されず、湿式クラッチにも有効である。 Although the friction material of the present invention has been described as being used for a dry clutch, the application is not limited to a dry clutch, but is also effective for a wet clutch.
従来の摩擦材の製造では、樹脂とゴムを溶解し、その液状体にガラスヤーンを漬け込んでガラスヤーンの全体に付着させる方法であったが、本発明の別の様相によれば、図４に示されるような方法で摩擦材を製造することも可能である。まずゴム、樹脂、摩擦調整剤を含む母材を混練し、粘土状モールド材料を形成する。一方ガラス繊維ヤーンを単独または銅線と共に撚りあわせ、撚糸状のガラスヤーンを製造する。粘土状モールド材料で撚糸状ガラスヤーンを被覆する。この被覆では、モールド材料は、ガラスヤーンのガラス繊維の間に侵入しない。すなわちガラス繊維が、モールド材料で含浸されることはない。 In the conventional manufacturing of the friction material, the resin and the rubber are dissolved, and the glass yarn is dipped in the liquid and adhered to the entire glass yarn. According to another aspect of the present invention, FIG. It is also possible to manufacture the friction material by the method as shown. First, a base material containing rubber, resin, and friction modifier is kneaded to form a clay mold material. On the other hand, a glass fiber yarn is twisted alone or together with a copper wire to produce a twisted glass yarn. A twisted glass yarn is coated with a clay mold material. With this coating, the mold material does not penetrate between the glass fibers of the glass yarn. That is, the glass fiber is not impregnated with the molding material.
さらに、上記のように被覆されたガラスヤーンを、例えば、特許第３５５６０７１に記載されているような巻き取り機により、一定のパターンで、例えばサイン波状に蛇行させながら巻き取り、リング状をした巻き取り品（タブレットとも称される）を製造する。 Further, the glass yarn coated as described above is wound up in a certain pattern, for example, in a meandering manner by a winder as described in Japanese Patent No. 3556071, and wound in a ring shape. Manufactures take-up products (also called tablets).
次に、上記巻き取り品を２枚重ね（２層構造フェーシングを製造する場合）、一定の圧力、例えば、５〜２５ＭＰａで加圧し、約１５０℃〜２７０℃の温度で加熱しながらプレスする。１層構造のフェーシングを製造する場合には、２枚を重ねる必要はない。加圧成形により、ゴムと樹脂を含むモールド材料は、一度溶融状態となるが、その後熱硬化する。この工程でもガラス繊維の間の空間が、溶融状態のモールド材料に含浸されることはない。 Next, two of the above wound products are stacked (in the case of producing a two-layer structure facing), pressed at a constant pressure, for example, 5 to 25 MPa, and pressed while being heated at a temperature of about 150 ° C. to 270 ° C. When manufacturing a single layer facing, it is not necessary to stack two sheets. The molding material containing the rubber and the resin is once melted by the pressure molding, but is then thermally cured. Even in this step, the space between the glass fibers is not impregnated with the molten mold material.
次に、加圧成形されたタブレットをオーブンに入れ、更に高い温度で３〜３０時間加熱（キュア）し、その後両面を研磨することにより、平面度および板厚が均一された、フェーシング（摩擦材）を完成できる。 Next, the pressure-molded tablet is placed in an oven, heated (cured) at a higher temperature for 3 to 30 hours, and then polished on both sides, whereby the flatness and thickness are uniformed. ) Can be completed.
上記方法により形成された摩擦材は、表面にゴム・樹脂母材と樹脂を含まないガラス繊維ヤーンが部分的に露出している。 In the friction material formed by the above method, the glass fiber yarn not containing the rubber / resin base material and the resin is partially exposed on the surface.
このような構造により、本発明の摩擦材は、表面部のガラス繊維ヤーンによつて、摩擦材と相手面の間の樹脂皮膜をクリーニングする効果があり、フェード性をできるという効果のほか、気孔性を高くできるという効果もある。 With such a structure, the friction material of the present invention has an effect of cleaning the resin film between the friction material and the mating surface by the glass fiber yarn of the surface portion, and in addition to the effect of fading, There is also an effect that can increase the nature.
上記方法で形成された摩擦材を２枚の金属板の間に挟持した状態で加熱炉に装入し、再加熱（リキュア）することにより、フェード性とジャダー性が良好なクラッチ用摩擦材が得られる。 A friction material for a clutch having good fading and judder properties can be obtained by inserting the friction material formed by the above method into a heating furnace while sandwiched between two metal plates and reheating (recuring) it. .
１０ 摩擦材
２０ 配合ゴム・樹脂母材
３０ 中間層
４０ 最外表面層
５０ 摩耗粉
６０ ドリブンプレート
６２ 安定皮膜
10
60 Driven
Claims (2)
前記配合ゴム・母材の上に形成され、前記母材内の前記熱硬化性樹脂が熱硬化することによって、生じたガラス状炭素構造またはグラファイト構造を含む中間層と、
前記中間層の上に形成され、前記母材内のゴム・樹脂成分が熱分解することによって生じた熱分解生成物を含む最外表面層とを備えるクラッチ用摩擦材。 Compound rubber and base material,
An intermediate layer that is formed on the compounded rubber / base material and includes a glassy carbon structure or a graphite structure generated by thermosetting the thermosetting resin in the base material;
A clutch friction material comprising: an outermost surface layer formed on the intermediate layer and containing a thermal decomposition product generated by thermal decomposition of a rubber / resin component in the base material.
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| JP2013186788A JP6130276B2 (en) | 2013-09-09 | 2013-09-09 | Friction material for clutch |
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| JP6130276B2 JP6130276B2 (en) | 2017-05-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620773A (en) * | 2016-07-15 | 2018-01-23 | 博格华纳公司 | Friction material |
| CN108167352A (en) * | 2017-12-27 | 2018-06-15 | 重庆红宇摩擦制品有限公司 | It is used to prepare the composition of disk type brake disc bed course |
| US10288138B2 (en) | 2013-09-09 | 2019-05-14 | Exedy Corporation | Friction material for clutch |
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| JPH03255235A (en) * | 1990-03-05 | 1991-11-14 | Hitachi Chem Co Ltd | Clutch driven plate |
| JPH03255234A (en) * | 1990-03-05 | 1991-11-14 | Hitachi Chem Co Ltd | Clutch driven plate and manufacture thereof |
| JPH07224872A (en) * | 1994-02-14 | 1995-08-22 | Toyota Motor Corp | Manufacture of clutch facing |
| JP2002129143A (en) * | 2000-10-19 | 2002-05-09 | Nippon Valqua Ind Ltd | Composition for friction surface, sheety molding, and brake lining material |
| JP2013044357A (en) * | 2011-08-23 | 2013-03-04 | Aisin Chemical Co Ltd | Dry friction material and method of manufacturing the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH03255235A (en) * | 1990-03-05 | 1991-11-14 | Hitachi Chem Co Ltd | Clutch driven plate |
| JPH03255234A (en) * | 1990-03-05 | 1991-11-14 | Hitachi Chem Co Ltd | Clutch driven plate and manufacture thereof |
| JPH07224872A (en) * | 1994-02-14 | 1995-08-22 | Toyota Motor Corp | Manufacture of clutch facing |
| JP2002129143A (en) * | 2000-10-19 | 2002-05-09 | Nippon Valqua Ind Ltd | Composition for friction surface, sheety molding, and brake lining material |
| JP2013044357A (en) * | 2011-08-23 | 2013-03-04 | Aisin Chemical Co Ltd | Dry friction material and method of manufacturing the same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10288138B2 (en) | 2013-09-09 | 2019-05-14 | Exedy Corporation | Friction material for clutch |
| CN107620773A (en) * | 2016-07-15 | 2018-01-23 | 博格华纳公司 | Friction material |
| CN107620773B (en) * | 2016-07-15 | 2021-03-19 | 博格华纳公司 | Friction material |
| CN108167352A (en) * | 2017-12-27 | 2018-06-15 | 重庆红宇摩擦制品有限公司 | It is used to prepare the composition of disk type brake disc bed course |
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| JP6130276B2 (en) | 2017-05-17 |
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