WO2023008387A1 - アンダーレイヤ材及び摩擦部材 - Google Patents
アンダーレイヤ材及び摩擦部材 Download PDFInfo
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- WO2023008387A1 WO2023008387A1 PCT/JP2022/028664 JP2022028664W WO2023008387A1 WO 2023008387 A1 WO2023008387 A1 WO 2023008387A1 JP 2022028664 W JP2022028664 W JP 2022028664W WO 2023008387 A1 WO2023008387 A1 WO 2023008387A1
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- friction
- underlayer
- mass
- friction member
- underlayer material
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/025—Compositions based on an organic binder
- F16D69/026—Compositions based on an organic binder containing fibres
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D2069/005—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure
Definitions
- the present invention relates to an underlayer material for friction members used in automobiles, railway vehicles, industrial machinery, etc., and a friction member using the underlayer material.
- friction members have been required to have various performances, for example, one of them is the reduction of noise (brake squeal) generated by braking operation.
- Patent Document 1 discloses a friction material comprising a fiber base material, a binder, an abrasive, and a friction modifier, in which a silane coupling agent is contained inside silicone rubber particles as the friction modifier.
- a friction material is disclosed which is characterized by containing dispersed silane coupling agent-dispersed silicone rubber particles.
- Patent Document 1 may reduce strength and heat resistance.
- the present invention has been made in view of the above-mentioned conventional circumstances, and an object to be solved is to provide an underlayer material that provides a friction member that has high strength and heat resistance and is less prone to brake squeal. .
- the present invention relates to the following ⁇ 1> to ⁇ 5>.
- An underlayer material used for a friction member The friction member has a friction material and a pressure plate, The friction material includes a friction modifier, a binder and a fiber base material, The underlayer material is an underlayer material containing a plant-derived resin.
- ⁇ 3> The underlayer material according to ⁇ 1> or ⁇ 2>, wherein the content of the plant-derived resin is 5 to 15% by mass.
- a friction member comprising a friction material, an underlayer material according to any one of ⁇ 1> to ⁇ 3>, and a pressure plate in this order.
- a friction member using the underlayer material of the present invention has high strength and heat resistance, and brake noise is less likely to occur.
- FIG. 1 is a schematic cross-sectional view showing a structural example of the friction member of this embodiment.
- the underlayer material of this embodiment is used for friction members.
- the friction member 10 has a friction material 1, an underlayer material 2 and a pressure plate 3 in this order.
- Friction materials include friction modifiers, binders and fibrous base materials.
- Friction modifiers used in friction materials are used to impart desired friction properties such as wear resistance, heat resistance, and fade resistance to friction materials.
- friction modifiers examples include inorganic fillers, organic fillers, abrasives, lubricants, and metal powders.
- inorganic fillers examples include titanates such as potassium titanate, lithium titanate, lithium potassium titanate, sodium titanate, calcium titanate, magnesium titanate, magnesium potassium titanate, barium sulfate, calcium carbonate, and water.
- titanates such as potassium titanate, lithium titanate, lithium potassium titanate, sodium titanate, calcium titanate, magnesium titanate, magnesium potassium titanate, barium sulfate, calcium carbonate, and water.
- Inorganic materials such as calcium oxide, vermiculite, and mica are included. These may be used alone or in combination of two or more.
- the inorganic filler is preferably used in an amount of 30 to 80% by mass, more preferably 40 to 70% by mass, of the total friction material.
- organic fillers examples include various rubber powders (raw rubber powder, tire powder, etc.), rubber dust, resin dust, cashew dust, tire tread, melamine dust, and the like. These are used singly or in combination of two or more.
- the organic filler is preferably used in an amount of 1 to 15% by mass, more preferably 1 to 10% by mass, based on the total friction material.
- abrasives examples include zirconium oxide, alumina, silica, magnesium oxide, zirconia, zirconium silicate, chromium oxide, triiron tetraoxide (Fe 3 O 4 ), and chromite. These may be used alone or in combination of two or more.
- the abrasive is preferably used in an amount of 1 to 20 mass%, more preferably 3 to 15 mass% of the total friction material.
- lubricants examples include graphite, coke, antimony trisulfide, molybdenum disulfide, tin sulfide, and polytetrafluoroethylene (PTFE). These may be used alone or in combination of two or more.
- the lubricant is preferably used in an amount of 1 to 20% by mass, more preferably 3 to 15% by mass, based on the total friction material.
- metal powders examples include powders of aluminum, tin, zinc, and copper. These are used singly or in combination of two or more.
- the metal powder is preferably used in an amount of 1 to 10% by mass, more preferably 1 to 5% by mass, based on the total friction material.
- the friction modifier preferably accounts for 60 to 90 mass %, more preferably 70 to 90 mass % of the total friction material.
- binders As the binder used for the friction material, various commonly used binders can be used. Specific examples include thermosetting resins such as phenolic resins, various modified phenolic resins such as elastomers, melamine resins, epoxy resins and polyimide resins.
- elastomer-modified phenolic resins examples include acrylic rubber-modified phenolic resins, silicone rubber-modified phenolic resins, nitrile rubber (NBR)-modified phenolic resins, and the like. These may be used alone or in combination of two or more.
- the binder is preferably used in an amount of 1 to 20% by mass, more preferably 3 to 15% by mass, based on the total friction material.
- ⁇ Fibrous base material examples include organic fibers and inorganic fibers.
- a fiber base material is used individually or in combination of 2 or more types.
- organic fibers examples include aromatic polyamide (aramid) fibers and flame-resistant acrylic fibers.
- inorganic fibers examples include biosoluble inorganic fibers, ceramic fibers, glass fibers, carbon fibers, and rock wool.
- biosoluble inorganic fibers include biosoluble ceramic fibers such as SiO 2 —CaO—MgO fiber, SiO 2 —CaO—MgO—Al 2 O 3 fiber, SiO 2 —MgO—SrO fiber, and biosoluble ceramic fibers. Dissolving rock wool etc. are mentioned.
- the fiber base material is preferably used in an amount of 3 to 30% by mass, more preferably 5 to 20% by mass, based on the total friction material.
- the friction material does not contain a copper component.
- the underlayer material of this embodiment preferably comprises a friction modifier, a binder and a fibrous base material.
- friction modifiers used in the underlayer material include inorganic fillers, organic fillers, abrasives, lubricants, and metal powders.
- inorganic fillers examples include titanates such as potassium titanate, lithium titanate, lithium potassium titanate, sodium titanate, calcium titanate, magnesium titanate, magnesium potassium titanate, barium sulfate, calcium carbonate, and water.
- titanates such as potassium titanate, lithium titanate, lithium potassium titanate, sodium titanate, calcium titanate, magnesium titanate, magnesium potassium titanate, barium sulfate, calcium carbonate, and water.
- Inorganic materials such as calcium oxide, vermiculite, and mica are included. These may be used alone or in combination of two or more.
- the inorganic filler is preferably used in an amount of 20 to 50% by mass, more preferably 25 to 45% by mass, of the entire underlayer material.
- organic fillers examples include various rubber powders (raw rubber powder, tire powder, etc.), rubber dust, resin dust, cashew dust, tire tread, melamine dust, and the like. These are used singly or in combination of two or more.
- the organic filler is preferably used in an amount of 1 to 15% by mass, more preferably 1 to 10% by mass, of the entire underlayer material.
- abrasives examples include zirconium oxide, alumina, silica, magnesium oxide, zirconia, zirconium silicate, chromium oxide, triiron tetraoxide (Fe 3 O 4 ), and chromite. These may be used alone or in combination of two or more, as required.
- the abrasive When the abrasive is added to the underlayer material, the abrasive is preferably used in an amount of 1 to 20% by mass, more preferably 3 to 15% by mass, based on the entire underlayer material.
- lubricants examples include graphite, coke, antimony trisulfide, molybdenum disulfide, tin sulfide, and polytetrafluoroethylene (PTFE). These may be used alone or in combination of two or more, as required.
- PTFE polytetrafluoroethylene
- the lubricant When the lubricant is added to the underlayer material, the lubricant is preferably used in an amount of 1 to 20% by mass, more preferably 3 to 15% by mass, based on the entire underlayer material.
- metal powders examples include powders of aluminum, tin, and zinc. These are used singly or in combination of two or more.
- the metal powder is preferably used in an amount of 1 to 10% by mass, more preferably 1 to 5% by mass, of the entire underlayer material.
- the friction modifier preferably accounts for 20 to 70% by mass, more preferably 30 to 60% by mass, of the entire underlayer material.
- the underlayer material of this embodiment contains a plant-derived resin as a binder. Plant-derived resins have irregular and highly complex chemical structures. As a result, the friction member obtained from the underlayer material of the present embodiment containing the plant-derived resin has high strength and high heat resistance, and it is believed that brake squeal is less likely to occur.
- plant-derived resins examples include lignin-modified phenolic resin, polylactic acid, esterified starch, polyhydroxybutyric acid, and polytrimethylene terephthalate.
- lignin-modified phenolic resins having functions derived from lignin, which is an irregular and extremely complex polyphenol chemical structure, are preferred.
- the plant-derived resin is preferably used in an amount of 5 to 15% by mass, more preferably 10 to 15% by mass, of the entire underlayer material.
- the content of the plant-derived resin is 5% by mass or more, the strength and heat resistance of the resulting friction member can be increased, and brake squeal can be further suppressed. Further, when the content of the plant-derived resin is 15% by mass or less, a sufficient amount of other components of the underlayer material can be contained.
- thermosetting resins such as phenol resins, modified phenol resins, melamine resins, epoxy resins and polyimide resins.
- modified phenol resins include acrylic-modified phenol resins, aralkyl-modified phenol resins, silicone rubber-modified phenol resins, nitrile rubber (NBR)-modified phenol resins, and the like. These may be used alone or in combination of two or more.
- NBR nitrile rubber
- the binder is preferably used in an amount of 1 to 25% by mass, more preferably 5 to 20% by mass, of the entire underlayer material.
- ⁇ Fibrous base material examples include organic fibers and inorganic fibers.
- a fiber base material is used individually or in combination of 2 or more types.
- organic fibers examples include aromatic polyamide (aramid) fibers and flame-resistant acrylic fibers.
- inorganic fibers include steel fibers, biosoluble inorganic fibers, ceramic fibers, glass fibers, carbon fibers, and rock wool.
- biosoluble inorganic fibers include biosoluble ceramic fibers such as SiO 2 —CaO—MgO fiber, SiO 2 —CaO—MgO—Al 2 O 3 fiber, SiO 2 —MgO—SrO fiber, and biosoluble ceramic fibers. Dissolving rock wool etc. are mentioned.
- the fiber base material preferably accounts for 10 to 50% by mass, more preferably 15 to 45% by mass, of the entire underlayer material.
- the underlayer material does not contain a copper component.
- the pressure plate is formed by sheet metal press working or the like.
- the material of the pressure plate is not particularly limited, and known iron metal materials can be used.
- known iron metal materials for example, hot-rolled steel sheets for automobile structures such as SAPH400 and SAPH440, and workable hot-rolled high-strength steel sheets for automobiles such as SPFH590 can be used.
- the friction material, underlayer material, and friction member can be manufactured by known manufacturing processes. For example, the above components are blended, and the blend is subjected to preforming, thermoforming, heating, polishing, etc. according to the usual manufacturing method. can be manufactured.
- a method of manufacturing a friction member comprising a friction material, an underlayer material and a pressure plate generally includes the following steps. (a) Forming the pressure plate into a predetermined shape by sheet metal pressing (b) Degreasing, chemically converting, and priming the pressure plate and applying an adhesive (c) Friction material raw material, underlayer Step (d) of preparing a preform by blending the raw materials of the material, sufficiently homogenizing them by mixing, sequentially putting the mixed raw materials into a mold, and molding them at room temperature under a predetermined pressure.
- the thickness of the friction material is preferably 4-15 mm, more preferably 6-13 mm.
- the thickness of the underlayer material is preferably 1-4 mm, more preferably 1-3 mm.
- Examples 1-3, Comparative Examples 1-3 The friction material compounding material and the underlayer material compounding material shown in Tables 2 and 3 are put into a mixing stirrer and mixed for 4 minutes at room temperature to obtain a friction material compounding material mixture and an underlayer material compounding material mixture. Obtained.
- the resulting mixture was subjected to the following steps of (i) preforming, (ii) thermoforming, (iii) heat treatment and scorch to produce a friction material.
- the shear strength of the friction member was measured at 25°C and 300°C according to JIS D 4422 (adhesion area: 55 cm 2 ). The measured value was the shear force per unit area (N/cm 2 ) obtained by dividing the stress at shear failure by the adhesion area between the pressure plate and the underlayer material.
- the calculated shear force was evaluated based on the following criteria.
- the generated cracks were evaluated based on the following criteria. ⁇ : no cracks ⁇ : cracks less than 0.1 mm wide ⁇ : cracks 0.1 mm or more and less than 0.2 mm wide ⁇ : cracks 0.2 mm or more wide
- the calculated brake squeal occurrence rate was evaluated based on the following criteria. ⁇ : no squeal ⁇ : more than 0% and less than 5% ⁇ : 5% or more and less than 10% ⁇ : 10% or more
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Abstract
Description
<1>摩擦部材に用いるアンダーレイヤ材であって、
前記摩擦部材は、摩擦材及びプレッシャプレートを有し、
前記摩擦材は、摩擦調整材、結合材及び繊維基材を含み、
前記アンダーレイヤ材は、植物由来樹脂を含む、アンダーレイヤ材。
<2>前記植物由来樹脂がリグニン変性フェノール樹脂である、<1>に記載のアンダーレイヤ材。
<3>前記植物由来樹脂の含有量が5~15質量%である、<1>又は<2>に記載のアンダーレイヤ材。
<4>摩擦材、<1>~<3>のいずれか1つに記載のアンダーレイヤ材及びプレッシャプレートをこの順に有する、摩擦部材。
<5>前記摩擦材が銅成分を含有しない、<4>に記載の摩擦部材。
図1に示すように、摩擦部材10は、摩擦材1、アンダーレイヤ材2及びプレッシャプレート3をこの順に有する。
摩擦材は、摩擦調整材、結合材及び繊維基材を含む。
摩擦材に用いる摩擦調整材は、耐摩耗性、耐熱性、耐フェード性等の所望の摩擦特性を摩擦材に付与するために用いられる。
摩擦材に用いる結合材としては、通常用いられる種々の結合材を用いることができる。具体的には、フェノール樹脂、エラストマー等による各種変性フェノール樹脂、メラミン樹脂、エポキシ樹脂、ポリイミド樹脂等の熱硬化性樹脂が挙げられる。
摩擦材に用いる繊維基材としては、例えば、有機繊維、無機繊維等が挙げられる。繊維基材は各々単独で、または2種以上組み合わせて用いられる。
本実施形態のアンダーレイヤ材は、摩擦調整材、結合材及び繊維基材を含むことが好ましい。
アンダーレイヤ材に用いる摩擦調整材としては、例えば、無機充填材、有機充填材、研削材、潤滑材、金属粉末等を挙げることができる。
が挙げられる。必要に応じて、これらは各々単独で、または2種以上組み合わせて用いられる。
本実施形態のアンダーレイヤ材は、結合材として、植物由来樹脂を含む。
植物由来樹脂は、不規則かつ極めて複雑な化学構造を有する。その結果、植物由来樹脂を含む本実施形態のアンダーレイヤ材から得られる摩擦部材は、強度及び耐熱性が高く、ブレーキ鳴きが発生しにくくなると考えられる。
アンダーレイヤ材に用いる繊維基材としては、例えば、有機繊維、無機繊維等が挙げられる。繊維基材は各々単独で、または2種以上組み合わせて用いられる。
プレッシャプレートは、板金プレス加工等により成形されるものである。プレッシャプレートの素材は、特に限定されることはなく、公知の鉄製金属材料を使用することができる。公知の鉄製金属材料としては、例えば、SAPH400やSAPH440等の自動車構造用熱間圧延鋼板や、SPFH590等の自動車用加工性熱間圧延高張力鋼板を使用することができる。
摩擦材、アンダーレイヤ材及び摩擦部材は、公知の製造工程により製造でき、例えば、上記各成分を配合し、その配合物を通常の製法に従って予備成形、熱成形、加熱、研摩等の工程を経て製造することができる。
(a)板金プレスによりプレッシャプレートを所定の形状に成形する工程
(b)上記プレッシャプレートに脱脂処理、化成処理及びプライマー処理を施し、接着剤を塗布する工程
(c)摩擦材の原料、アンダーレイヤ材の原料を配合し、それぞれ混合により十分に均質化して、混合した原料を順次型に投入し、常温にて所定の圧力で成形して予備成形体を作製する工程
(d)上記予備成形体と接着剤が塗布されたプレッシャプレートとを、所定の温度及び圧力を加えて両部材を一体に固着する熱成形工程(成形温度130~180℃、成形圧力30~80MPa、成形時間2~10分間)
(e)アフターキュア(150~300℃、1~5時間)を行って、最終的に研摩、スコーチ、及び塗装等の仕上げ処理を施す工程
アンダーレイヤ材の厚みは、好ましくは1~4mm、より好ましくは1~3mmである。
表2~3に示す摩擦材の配合材料及びアンダーレイヤ材の配合材料を、それぞれ混合撹拌機に投入し、常温で4分間混合し、摩擦材の配合材料混合物及びアンダーレイヤ材の配合材料混合物を得た。
摩擦材の配合材料混合物及びアンダーレイヤ材の配合材料混合物を予備成形プレスの金型に順次投入し、常温にて20MPaで10秒間成形を行い、予備成形体を作製した。
(ii)熱成形
この予備成形体を熱成形型に投入し、予め接着剤を塗布した金属板(プレッシャプレート)を重ね、150℃、40MPaで5分間加熱加圧成形を行った。
(iii)熱処理、スコーチ
この加熱加圧成形体に、250℃、3時間の熱処理を実施した後、表面を研摩した。
次いで、この加熱加圧成形体の表面にスコーチ処理を施し、仕上げに塗装を行い、摩擦部材を得た。
JIS D 4422に準拠して、25℃及び300℃での摩擦部材のせん断強度を測定した(接着面積:55cm2)。測定値は、せん断破壊された時の応力をプレッシャプレートとアンダーレイヤ材との接着面積で割り、単位面積当たりのせん断力(N/cm2)とした。
◎:550N/cm2以上
○:500N/cm2以上550N/cm2未満
△:450N/cm2以上500N/cm2未満
×:450N/cm2未満
◎:350N/cm2以上
○:300N/cm2以上350N/cm2未満
△:250N/cm2以上300N/cm2未満
×:250N/cm2未満
表1に記載の試験条件に基づき、フルサイズのダイナモメータを用いて、上記で得られた摩擦部材の評価を実施した。すなわち、フェード(速度:100→0km/h、減速度:4.4m/s2で10~15回)と、リカバリ(速度:50→0km/h、減速度:3.0m/s2で15回)の繰り返しによって急激な熱変化を発生させ、その熱変化に起因する摩擦材及びアンダーレイヤ材の熱伝導差による、摩擦部材側面のクラック発生の有無を確認した。
パッド面積:37cm2、ディスク径:300mm、イナーシャ:100kg・m2
◎:クラック発生なし
○:幅0.1mm未満のクラック発生あり
△:幅0.1mm以上0.2mm未満のクラック発生あり
×:幅0.2mm以上のクラック発生あり
上記で得られた摩擦部材を使用し、実車(車種:SUV AT車、車両重量:2000kg)にて、JASO C402(乗用車用ブレーキパッド実車試験方法)に準拠して実車鳴き試験を実施し、ブレーキ鳴き発生率を求めた。
◎:鳴き発生なし
○:0%超5%未満
△:5%以上10%未満
×:10%以上
2 アンダーレイヤ材
3 プレッシャプレート
10 摩擦部材
Claims (7)
- 摩擦部材に用いるアンダーレイヤ材であって、
前記摩擦部材は、摩擦材及びプレッシャプレートを有し、
前記摩擦材は、摩擦調整材、結合材及び繊維基材を含み、
前記アンダーレイヤ材は、植物由来樹脂を含む、アンダーレイヤ材。 - 前記植物由来樹脂がリグニン変性フェノール樹脂である、請求項1に記載のアンダーレイヤ材。
- 前記植物由来樹脂の含有量が5~15質量%である、請求項1又は2に記載のアンダーレイヤ材。
- 摩擦材、請求項1または2に記載のアンダーレイヤ材及びプレッシャプレートをこの順に有する、摩擦部材。
- 摩擦材、請求項3に記載のアンダーレイヤ材及びプレッシャプレートをこの順に有する、摩擦部材。
- 前記摩擦材が銅成分を含有しない、請求項4に記載の摩擦部材。
- 前記摩擦材が銅成分を含有しない、請求項5に記載の摩擦部材。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202280052221.6A CN117836535A (zh) | 2021-07-30 | 2022-07-25 | 底层材料和摩擦部件 |
| US18/293,037 US20240247698A1 (en) | 2021-07-30 | 2022-07-25 | Underlayer material and friction member |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021125660A JP7667010B2 (ja) | 2021-07-30 | 2021-07-30 | アンダーレイヤ材及び摩擦部材 |
| JP2021-125660 | 2021-07-30 |
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| Publication Number | Publication Date |
|---|---|
| WO2023008387A1 true WO2023008387A1 (ja) | 2023-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2022/028664 Ceased WO2023008387A1 (ja) | 2021-07-30 | 2022-07-25 | アンダーレイヤ材及び摩擦部材 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240247698A1 (ja) |
| JP (1) | JP7667010B2 (ja) |
| CN (1) | CN117836535A (ja) |
| WO (1) | WO2023008387A1 (ja) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6449725A (en) * | 1987-08-20 | 1989-02-27 | Akebono Res & Dev Centre | Pad for disc brake |
| JP2013173882A (ja) * | 2012-02-27 | 2013-09-05 | Akebono Brake Ind Co Ltd | 摩擦材 |
-
2021
- 2021-07-30 JP JP2021125660A patent/JP7667010B2/ja active Active
-
2022
- 2022-07-25 US US18/293,037 patent/US20240247698A1/en active Pending
- 2022-07-25 WO PCT/JP2022/028664 patent/WO2023008387A1/ja not_active Ceased
- 2022-07-25 CN CN202280052221.6A patent/CN117836535A/zh active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6449725A (en) * | 1987-08-20 | 1989-02-27 | Akebono Res & Dev Centre | Pad for disc brake |
| JP2013173882A (ja) * | 2012-02-27 | 2013-09-05 | Akebono Brake Ind Co Ltd | 摩擦材 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20240247698A1 (en) | 2024-07-25 |
| CN117836535A (zh) | 2024-04-05 |
| JP7667010B2 (ja) | 2025-04-22 |
| JP2023020346A (ja) | 2023-02-09 |
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