JPH0469421A - Friction material for brake - Google Patents
Friction material for brakeInfo
- Publication number
- JPH0469421A JPH0469421A JP18132490A JP18132490A JPH0469421A JP H0469421 A JPH0469421 A JP H0469421A JP 18132490 A JP18132490 A JP 18132490A JP 18132490 A JP18132490 A JP 18132490A JP H0469421 A JPH0469421 A JP H0469421A
- Authority
- JP
- Japan
- Prior art keywords
- base material
- dimensional network
- friction material
- molded body
- kcl
- 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
- 239000002783 friction material Substances 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 56
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 31
- 239000000835 fiber Substances 0.000 abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 6
- 239000002002 slurry Substances 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 239000011396 hydraulic cement Substances 0.000 description 4
- 229910017053 inorganic salt Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 235000003823 Petasites japonicus Nutrition 0.000 description 1
- 240000003296 Petasites japonicus Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
Landscapes
- Braking Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、ブレーキ用摩擦材料に関するものである。[Detailed description of the invention] (Industrial application field) The present invention relates to a friction material for brakes.
（従来の技術）
ディスクブレーキパッドなどに用いられるブレーキ用摩
擦材料は、耐クラツク性や耐摩耗性等の性能が優れてい
ることが必要である。このため、前記性能を改良すべ（
特開昭６２−２０９２３７号公報、特開昭６４−７４３
３２号公報、「トヨタ技術公開集Ｊ 、 ＮＣＬ２９４
８．第１０３〜１０４頁、昭和６３年１２月２６日発行
、トヨタ自動車■、等に見られるように多くの提案がな
されている。(Prior Art) Brake friction materials used in disc brake pads and the like must have excellent properties such as crack resistance and wear resistance. Therefore, it is necessary to improve the above performance (
JP-A-62-209237, JP-A-64-743
Publication No. 32, “Toyota Technical Publications J, NCL294
8. Many proposals have been made, as seen in pages 103-104, published December 26, 1988, Toyota Motor Corporation.
中でも府記ｒトヨタ技術公開集Ｊに記載されたディスク
ブレーキパッドは、レジンモールドタイプのディスクブ
レーキパッドにおいて短繊維と長繊維とからなる鋼繊維
基材を使用し、短繊維をパッド全体に均一に分散すると
ともに長繊維をパッドの一端から他端まで貫通して摺動
方向に配設したものであり、特にパッドの摺動方向の強
度が向上している。Among them, the disc brake pad described in Fuki r Toyota Technical Publications J is a resin mold type disc brake pad that uses a steel fiber base material consisting of short fibers and long fibers, and the short fibers are distributed uniformly throughout the pad. In addition to being dispersed, the long fibers are disposed through the pad from one end to the other end in the sliding direction, and the strength of the pad in the sliding direction is particularly improved.
（発明が解決しようとする課題）
「トヨタ技術公開集」に記載されたディスクブレーキパ
ッドは、長繊維によりパッドの摺動方向の強度は向上し
ているものの短繊維による摺動方向と直交する方向の補
強が充分ではない。(Problem to be solved by the invention) Although the disc brake pad described in the "Toyota Technical Publications" has improved strength in the sliding direction of the pad due to the long fibers, the strength in the sliding direction of the pad is improved due to the short fibers. reinforcement is not sufficient.
このため、ディスクブレーキパッドに摺動方向の応力が
働いた場合には鋼繊維基材の繊維間隙を充填している母
材にクラックが発生する恐れがあった。そこで、本発明
は上記問題点を解決する摩擦材料を提供することを目的
とする。For this reason, when stress in the sliding direction is applied to the disc brake pad, there is a risk that cracks will occur in the base material filling the fiber gaps of the steel fiber base material. Therefore, an object of the present invention is to provide a friction material that solves the above problems.
（課題を解決するための手段）
本発明のブレーキ用摩擦材料は、裏金と、該裏金と一体
に形成された三次元網目構造を有する基材と、該基材の
三次元網目状間隙に充填された母材とからなるという特
徴を有している。(Means for Solving the Problems) The friction material for brakes of the present invention comprises a backing metal, a base material having a three-dimensional network structure integrally formed with the backing metal, and filling the three-dimensional network gap of the base material. It has the characteristic that it consists of a solid base material.
裏金及び基材としては例えばアルミニウム及びその合金
を使用する。裏金の大きさや形状は目的とするブレーキ
用摩擦材料の大きさや形状に応じて選択する。又、裏金
の補強のために耐熱性材料例えばセラミックからなる部
材若しくは所望の予備成形体、いわゆるセラミックバル
クを補強材として用いてもよい。For example, aluminum and its alloys are used as the back metal and the base material. The size and shape of the back metal are selected depending on the size and shape of the intended brake friction material. Further, for reinforcing the back metal, a member made of a heat-resistant material such as ceramic or a desired preform, so-called ceramic bulk, may be used as a reinforcing material.
基材は裏金と同一の材料を用いて裏金と一体に形成する
。基材及び裏金の形成方法としては通常鋳造法を用いる
。又、三次元網目構造を有する基材を形成するためには
例えば鋳造の際に水溶性で且つ融点が基材の溶湯の温度
よりも高い無機塩を裏金に接触させて所望形状に配置し
ておき、基材と裏金を一体に鋳造機前記無機塩を水で溶
出する方法を用いることができる。この場合、無機塩の
種類、大きさ、形状等の性状は形成すべき三次元網目構
造の性状例えば平均気孔径や気孔率に応じて適宜選択す
る。The base material is formed integrally with the back metal using the same material as the back metal. A casting method is usually used to form the base material and back metal. In addition, in order to form a base material having a three-dimensional network structure, for example, during casting, an inorganic salt that is water-soluble and has a melting point higher than the temperature of the molten metal of the base material is brought into contact with the backing metal and arranged in the desired shape. A method may be used in which the inorganic salt is dissolved out using water. In this case, the type, size, shape, and other properties of the inorganic salt are appropriately selected depending on the properties of the three-dimensional network structure to be formed, such as the average pore diameter and porosity.
母材としては、三次元網目状間隙への充填時は液体であ
って後に硬化する各種材料例えば、有機材料例えば液状
フェノール樹脂などの合成樹脂や無機材料例えば水硬性
セメントなどのセメントからなる結合剤に所望により他
の添加剤例えばグラファイト粉末などを混合したものを
用いることができる。Base materials include various materials that are liquid when filling into the three-dimensional mesh gap and harden later, such as organic materials such as synthetic resins such as liquid phenol resin, and binders made of inorganic materials such as cement such as hydraulic cement. If desired, a mixture of other additives such as graphite powder may be used.
形成したブレーキ用摩擦材料は所望により後加工を行っ
て、ディスクブレーキパッドなとの用途に供する。The formed brake friction material is subjected to post-processing if desired, and is used for applications such as disc brake pads.
（作用）
基材が三次元網目構造をしておりブレーキ用摩擦材料の
骨格をなしているので、摩擦材料への押圧力及び摩擦力
は主に基材が担い又母材が前記基材の補助的な働きをす
ると同時に摩擦特性の調整の働きを担う。それ故、摩擦
材料への押圧力及び摩擦力を基材と母材とで共同して担
うので各々の材料への負荷特に母材への負荷が軽減され
る。(Function) Since the base material has a three-dimensional network structure and forms the framework of the friction material for brakes, the pressing force and frictional force on the friction material are mainly carried by the base material, and the base material It plays a supporting role and at the same time plays a role in adjusting friction characteristics. Therefore, since the base material and the base material jointly bear the pressing force and frictional force on the friction material, the load on each material, especially the load on the base material, is reduced.
（実施例） 以下に本発明の実施例及び比較例を説明する。(Example) Examples and comparative examples of the present invention will be described below.
実施例１
本発明のブレーキ用摩擦材料の、裏金１とそれと一体と
なった基材２とからなる成形体４はダイカスト法で鋳造
した。すなわち第４図に示すように、金型５と金型６と
によって形成されたブレーキ用摩擦材料のキャビティ７
の母材に相当する部分に予めＫＣｆ粒を三次元の網目状
に連結したＫＣＩ成形体８を配置しておき、次いでアル
ミニウムの溶湯を注湯口９から矢印の如く注湯しピスト
ン１０で矢印方向に加圧してキャビティ７内にアルミニ
ウムの溶湯を充填した後冷却固化し、次いで水洗しＫ（
、Ｊ’粒を溶出して三次元網目状間隙１１を有する成形
体４を得た。なお、三次元網目状間隙１１の平均気孔径
は０．５鴎、気孔率は６５％であった。この成形体４を
第５図（ａ）に示すように金型１２と金型１３との間に
配置し、次いで第５図（ｂ）に示すように重量比で水２
０部、水硬性セメンｈ１００部及びグラファイト２０部
からなるスラリー１４を金型１５と金型１６とにより矢
印方向に加圧して三次元網目状間隙１１に圧入し、室温
でＩＯ時時間−て１００℃で３時間保持しスラリー１４
を硬化させて母材３を形成した。第１図にこうして得た
実施例１のブレーキ用摩擦材料の説明図を示す。第２図
は第１図のＡ部分の拡大図であり、母材３と基材２とが
ともに三次元網目状となって結合しているのが分かる。Example 1 A molded body 4 made of a back metal 1 and a base material 2 integrated therewith, of the friction material for brakes of the present invention, was cast by a die casting method. That is, as shown in FIG. 4, a cavity 7 of brake friction material formed by the mold 5 and the mold 6
A KCI molded body 8 in which KCf grains are connected in a three-dimensional network is placed in advance in a portion corresponding to the base material of After filling the cavity 7 with molten aluminum under pressure, it is cooled and solidified.
, J' grains were eluted to obtain a molded body 4 having three-dimensional network-like gaps 11. Note that the average pore diameter of the three-dimensional mesh gap 11 was 0.5 mm, and the porosity was 65%. This molded body 4 is placed between the molds 12 and 13 as shown in FIG. 5(a), and then water is added in a weight ratio of 2
A slurry 14 consisting of 0 parts of hydraulic cement h, 100 parts of hydraulic cement h, and 20 parts of graphite was pressurized in the direction of the arrow by a mold 15 and a mold 16 to be press-fitted into the three-dimensional mesh gap 11, and then heated at room temperature for 100 IO hours. Hold the slurry at 14°C for 3 hours.
was cured to form a base material 3. FIG. 1 shows an explanatory diagram of the brake friction material of Example 1 thus obtained. FIG. 2 is an enlarged view of part A in FIG. 1, and it can be seen that the base material 3 and the base material 2 are bonded together in a three-dimensional mesh shape.
又、第３図は第１図のＢ部分の拡大図であり、裏金１と
基材２とが一体となっているのが分かる。Moreover, FIG. 3 is an enlarged view of part B in FIG. 1, and it can be seen that the back metal 1 and the base material 2 are integrated.
実施例２
予めキャビティ７の裏金部分にセラミックバルクを配置
しておいて注湯すること以外は、実施例１と同様にして
実施例２のブレーキ用摩擦材料を得た。本実施例ではブ
レーキ用摩擦材料の裏金部分はセラミックバルクにより
補強されている。。Example 2 A brake friction material of Example 2 was obtained in the same manner as in Example 1, except that a ceramic bulk was placed in advance on the back metal part of the cavity 7 and then poured. In this embodiment, the back metal portion of the brake friction material is reinforced with ceramic bulk. .
実施例３
水硬性セメントの代わりに液状フェノール樹脂を用いる
こと以外は、実施例１と同様にして実施例３のブレーキ
用摩擦材料を得た。Example 3 A brake friction material of Example 3 was obtained in the same manner as in Example 1 except that liquid phenol resin was used instead of hydraulic cement.
比較例
三次元網目構造を有する基材を裏金と一体に形成する代
わりに、この基材と同一重量のアルミニウム短繊維（平
均径的６０μｍ、平均長さ約３ｍｍ）を用いること以外
は、実施例１と同様にして比較例のブレーキ用摩擦材料
を得た。Comparative Example Except for using short aluminum fibers (average diameter 60 μm, average length approximately 3 mm) having the same weight as the base material instead of integrally forming the base material having a three-dimensional network structure with the backing metal. A brake friction material of a comparative example was obtained in the same manner as in Example 1.
性能比較試験
実施例１と比較例の各ブレーキ用摩擦材料について引張
強度を測定したところ、第４図に示す如（実施例１のブ
レーキ用摩擦材料は比較例のブレーキ用摩擦材料に比べ
て約２．５倍引張強度が大きかった。又、各ブレーキ用
摩擦材料についてブレーキダイナモメータで車速１００
→Ｏｋｏ］／ｈ、減速度０．６Ｇ、制動前ロータ温度１
００℃で鋳鉄ロータを相手材として摩耗試験を繰り返し
行ったところ、比較例のブレーキ用摩擦材料は８回目に
パッドに欠けが発生したのに対し、実施例１のブレーキ
用摩擦材料は５０回終了後もパッドに全くクラックが生
じなかった。Performance Comparison Test When the tensile strength of each brake friction material of Example 1 and Comparative Example was measured, the tensile strength was determined as shown in Figure 4 (the brake friction material of Example 1 was approximately The tensile strength was 2.5 times higher.Also, each brake friction material was measured at a vehicle speed of 100 on a brake dynamometer.
→Oko]/h, deceleration 0.6G, rotor temperature before braking 1
When a wear test was repeated at 00°C using a cast iron rotor as a mating material, the brake friction material of Comparative Example developed chipping in the pad after the 8th test, while the brake friction material of Example 1 completed the 50th test. There were no cracks in the pad after that.
（発明の効果）
本発明のブレーキ用摩擦材料は、裏金と一体に形成され
た三次元網目構造を有する基材の三次元網目状間隙に母
材か充填されてなるため、裏金と母材との間の結合強度
が従来のブレーキ用摩擦材料に比べて向上した。又、裏
金と母材との接着層が不必要となったため従来のブレー
キ用摩擦材料に比べて有効摩耗代か増加しその結果摩耗
寿命が向上した。更に、基材と母材とが三次元網目状に
絡み合って結合しているため、材料の均一性が向上し、
その結果従来のブレーキ用摩擦材料に比べて安定した制
動性能が得られた。(Effects of the Invention) The friction material for brakes of the present invention is formed by filling the three-dimensional mesh gap of the base material having a three-dimensional network structure integrally formed with the backing metal, so that the backing metal and the base material are The bonding strength between the materials has been improved compared to conventional brake friction materials. In addition, since an adhesive layer between the backing metal and the base material is no longer necessary, the effective wear amount is increased compared to conventional brake friction materials, and as a result, the wear life is improved. Furthermore, since the base material and base material are intertwined and bonded in a three-dimensional network, the uniformity of the material is improved,
As a result, more stable braking performance was achieved than with conventional brake friction materials.
本発明のブレーキ用摩擦材料は特に従来の母材を裏金に
接着したブレーキ用摩擦材料に比べると更に以下のよう
な利点がある。The friction material for brakes of the present invention has the following advantages, particularly compared to conventional friction materials for brakes in which a base material is bonded to a back metal.
ｉ）従来は裏金と母材との間の熱膨張・収縮の差か大き
く、接着面にストレスか働くため長期間使用した場合に
は接着剤の劣化や破壊か生じたのに対して、本発明のブ
レーキ用摩擦材料においては接着剤を使用しないためこ
のような不具合はなく、それ故耐久性か向上した。i) In the past, there was a large difference in thermal expansion and contraction between the backing metal and the base metal, which caused stress on the adhesive surface, which caused the adhesive to deteriorate or break when used for a long time. The friction material for brakes of the invention does not use adhesive, so there is no such problem, and therefore the durability is improved.
ｉｉ）本発明のブレーキ用摩擦材料においては接着剤を
保護する必要がないため、ヒートバリア層が不要となっ
た。なお、ペーパーロック対策としては裏金の母材と反
対の側に低熱伝導材を溶射すればよく、簡単に実施でき
る。ii) Since there is no need to protect the adhesive in the brake friction material of the present invention, a heat barrier layer is no longer necessary. Note that as a countermeasure against paper lock, it is sufficient to thermally spray a low thermal conductive material on the side of the back metal opposite to the base metal, which can be easily implemented.
ｉｉ）従来は接着剤の接着力を補強するために裏金にモ
ールド穴が必要てあり、裏金のモールド穴の部分と平坦
部とで母材の充填度や流れに差があるため性能バラツキ
の一因となっていたが、本発明のブレーキ用摩擦材料に
おいてはモールド穴が必要ないため安定した性能が容易
に得られる。ii) Conventionally, a mold hole was required in the back metal to reinforce the adhesive strength of the adhesive, and there was a difference in the degree of filling and flow of the base material between the mold hole part and the flat part of the back metal, which caused performance variations. However, in the brake friction material of the present invention, stable performance can be easily obtained since mold holes are not required.
第１図は本発明のブレーキ用摩擦材料の実施例１の説明
図、
第２図は第１図のＡ部分の拡大図、
第３図は第１図のＢ部分の拡大図、
第４図は本発明のブレーキ用摩擦材料の実施例１の裏金
及び基材の製造工程の説明図、第５図は第４図の工程で
製造した裏金及び基材に母材を充填する工程の説明図、
第６図は実施例１の本発明のブレーキ用摩擦材料と比較
例のブレーキ用摩擦材料との引張強度の比較図を表わす
。
図中、
１−・−裏金 ２−ｍ−基材 ３−・−母材４
．８−一成形体 ５，６，１２，１３，１５゜１６−
・・金型 ７−・キャビティ ９−注湯口１０−−
ゼストン １１・−三次元網目状間隙１４−・−スラ
リー
特許出願人 トヨタ自動車株式会社代理人
弁理士 萼 優 美（ほか２名）Figure 1 is an explanatory diagram of Example 1 of the friction material for brakes of the present invention, Figure 2 is an enlarged view of part A in Figure 1, Figure 3 is an enlarged view of part B in Figure 1, and Figure 4. 5 is an explanatory diagram of the manufacturing process of the back metal and base material of Example 1 of the friction material for brakes of the present invention, and FIG. 5 is an explanatory diagram of the process of filling the base material into the back metal and base material manufactured in the process of FIG. 4. , FIG. 6 shows a comparison diagram of the tensile strength of the brake friction material of the present invention of Example 1 and the brake friction material of the comparative example. In the figure, 1--back metal 2-m-base material 3--base material 4
．． 8-One molded body 5, 6, 12, 13, 15° 16-
・・Mold 7−・Cavity 9−Pouring port 10−−
ZESTON 11 - Three-dimensional mesh gap 14 - Slurry patent applicant Toyota Motor Corporation Agent
Patent attorney Yumi Sae (and 2 others)
Claims (1)
する基材と、該基材の三次元網目状間隙に充填された母
材とからなることを特徴とするブレーキ用摩擦材料。A brake friction material comprising a backing metal, a base material having a three-dimensional network structure integrally formed with the backing metal, and a base material filling the three-dimensional mesh-like gaps of the base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18132490A JPH0469421A (en) | 1990-07-09 | 1990-07-09 | Friction material for brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18132490A JPH0469421A (en) | 1990-07-09 | 1990-07-09 | Friction material for brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0469421A true JPH0469421A (en) | 1992-03-04 |
Family
ID=16098699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18132490A Pending JPH0469421A (en) | 1990-07-09 | 1990-07-09 | Friction material for brake |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0469421A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016532831A (en) * | 2013-06-17 | 2016-10-20 | イタルチェメンティ ソシエタ ペル アチオニＩｔａｌｃｅｍｅｎｔｉ Ｓ．Ｐ．Ａ． | Brake pad friction material and related brake pads |
| CN110715003A (en) * | 2018-07-12 | 2020-01-21 | Mat商用车辆产品有限公司 | Brake pad, disc brake assembly and vehicle |
-
1990
- 1990-07-09 JP JP18132490A patent/JPH0469421A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016532831A (en) * | 2013-06-17 | 2016-10-20 | イタルチェメンティ ソシエタ ペル アチオニＩｔａｌｃｅｍｅｎｔｉ Ｓ．Ｐ．Ａ． | Brake pad friction material and related brake pads |
| CN110715003A (en) * | 2018-07-12 | 2020-01-21 | Mat商用车辆产品有限公司 | Brake pad, disc brake assembly and vehicle |
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