WO2016017488A1 - 摩擦材 - Google Patents
摩擦材 Download PDFInfo
- Publication number
- WO2016017488A1 WO2016017488A1 PCT/JP2015/070778 JP2015070778W WO2016017488A1 WO 2016017488 A1 WO2016017488 A1 WO 2016017488A1 JP 2015070778 W JP2015070778 W JP 2015070778W WO 2016017488 A1 WO2016017488 A1 WO 2016017488A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- friction material
- friction
- material composition
- titanate
- total amount
- Prior art date
Links
Classifications
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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
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Compositions 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—Compositions 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
- F16D69/02—Compositions of linings; Methods of manufacturing
- F16D69/027—Compositions based on metals or inorganic oxides
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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
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0034—Materials; Production methods therefor non-metallic
- F16D2200/0052—Carbon
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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
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
-
- 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
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
- F16D2200/0069—Materials; Production methods therefor containing fibres or particles being characterised by their size
Definitions
- the present invention relates to a friction material obtained by molding a friction material composition of NAO (Non-Asbestos-Organic) material used for a disc brake pad.
- NAO Non-Asbestos-Organic
- a disc brake is used as a braking device for a passenger car, and a disc brake pad in which a friction material is attached to a metal base member is used as the friction member.
- the friction material includes a semi-metallic friction material containing 30% by weight or more and less than 60% by weight of steel fiber as a fiber base material, and steel fiber in a part of the fiber base material.
- the steel is classified into a low steel friction material containing less than 30% by weight of fibers with respect to the total amount of the friction material composition, and a NAO material that does not contain steel fibers such as steel fibers and stainless steel as a fiber base material.
- the friction material of NAO material used for the disc brake pad is a copper or copper alloy such as copper or copper alloy fibers or particles as an essential component to ensure braking effectiveness and wear resistance during high speed and high load braking. About 5 to 20% by weight is added to the total amount of the material composition.
- the NAO friction material does not easily generate high-frequency vibration brake noise called “squeal”, but has a problem that low-frequency vibration noise called “low-frequency noise” is likely to occur.
- Patent Document 1 discloses a friction material obtained by molding and curing a friction material composition including a fiber base material, a binder, and a filler, and includes zinc oxide, magnesium oxide, iron tetroxide, and manganese trioxide. 3% or more of metal oxides selected from tin oxide and titanium oxide are contained in a total volume of 12% by volume or more, which can suppress the generation of low-frequency noise and reduce the amount of wear on the rotor and disk pad. A balanced friction material having a high friction coefficient ⁇ at high speed and stable is described.
- Patent Document 2 includes composite particles obtained by combining iron oxide primary particles and a resin as a part of the friction adjusting material in a friction material including at least a fiber base material, a binder, and a friction adjusting material.
- a friction material with reduced abnormal noise generation is described.
- the present invention relates to a friction material obtained by molding a friction material composition of NAO material used for a disc brake pad, and a friction material that suppresses the generation of abnormal noise at the time of stopping while satisfying the laws and regulations concerning the content of the copper component.
- the issue is to provide.
- the present inventors have conducted intensive studies and found that a specific titanate and a specific material are not added to the friction composition in order to suppress wear of the counterpart material without adding a raw material that causes rust.
- a specific amount of inorganic friction modifier is added, and a specific amount of specific inorganic friction modifier is added to suppress the formation of wear powder aggregates. It was discovered that abnormal noise can be suppressed at the time of stopping by adding a specific amount of a specific carbonaceous lubricant in order to facilitate the discharge of wear powder, and the invention has been completed.
- the present invention is a friction material obtained by molding a friction material composition of NAO material that does not contain a copper component and is used for a disc brake pad, and is based on the following technology.
- the friction material composition does not substantially contain an iron component and is used as a titanate.
- Non-whisker-like titanate is 15 to 25% by weight based on the total amount of the friction material composition, and zirconium oxide having an average particle size of 1.0 to 4.0 ⁇ m is used as the total amount of the friction material composition as an inorganic friction modifier.
- a friction material obtained by molding a friction material composition of NAO material used for a disc brake pad while satisfying the laws and regulations concerning the content of the copper component, braking with a light load is repeated, and the friction material and The friction material which can suppress generation
- the friction material composition contains 15-25% by weight of non-whisker-like titanate as a titanate with respect to the total amount of the friction material composition.
- Zirconium oxide having an average particle size of 1.0 to 4.0 ⁇ m is added in an amount of 15 to 25% by weight based on the total amount of the friction material composition.
- the non-whisker-like titanate means a titanate that is not a needle-like shape (whisker-like) having an aspect ratio of 3 or more.
- the shape is a polygon, circle, ellipse, or the like. It means a plate-like titanate to be exhibited, or an irregular shape titanate having an amoeba shape or a jigsaw puzzle piece shape as described in International Publication No. 2008/123046.
- This coating prevents the grinding-type inorganic friction modifier contained in the friction material from directly grinding the sliding surface of the counterpart material, thereby suppressing the generation of wear powder on the counterpart material.
- non-whisker-like titanate and zirconium oxide are too small, there will be a problem that sufficient wear-inhibiting effect of the counterpart material cannot be obtained, and the contents of non-whisker-like titanate and zirconium oxide are high. If the amount is too high, there will be a problem that the effect becomes unstable.
- the average particle size is a value of 50% particle size measured by the laser diffraction particle size distribution method.
- cleaving mineral particles are added in an amount of 4 to 6% by weight based on the total amount of the friction material composition in order to suppress the formation of wear powder aggregates.
- the wear powder of the cleaving mineral particles discharged from the friction material is a plate-like particle, and when this plate-like particle is taken into the aggregate of the wear powder, slip occurs between the wear powder in the vicinity of the plate particle. This is presumed to be because the wear powder aggregates easily collapse.
- the content of the cleaving mineral particles is small, there will be a problem that the effect of suppressing the formation of wear powder aggregates will not be obtained sufficiently. If the content of the cleaving mineral particles is large, the friction surface of the counterpart material will be mirrored. As a result, there is a problem that the coefficient of friction increases rapidly when moisture is absorbed and squeal is likely to occur.
- the cleaving mineral particles include mica and vermiculite, and these can be used alone or in combination of two.
- the average particle diameter of the cleaving mineral particles is preferably in the range of 50 to 700 ⁇ m, more preferably in the range of 300 to 600 ⁇ m.
- the friction material composition of this invention does not contain an iron component substantially, generation
- the phrase “substantially not containing an iron component” means that a raw material mainly composed of iron such as iron, an iron alloy, or an iron compound is not added to the friction material composition.
- Non-whisker-like titanates include potassium titanate, lithium potassium titanate, magnesium potassium titanate, etc., and these can be used alone or in combination of two or more. It is preferred to use potassium alone.
- the flake graphite particles are used as the carbonaceous lubricant in the friction material composition so that the wear powder is easily discharged from the sliding surface of the friction material and the counterpart material in light load braking. Add 2-4% by weight with respect to the total amount.
- the flaky graphite particles are graphite particles obtained by finely pulverizing expanded graphite particles obtained by exothermic expansion of natural flaky graphite, quiche graphite, pyrolytic graphite and the like several tens to several hundred times.
- the wear powder If the wear powder itself does not have lubricity, the wear powder will not be discharged from the sliding surface of the friction material and the mating material, but will accumulate on the friction material and the fine irregularities of the sliding surface, causing wear noise that causes abnormal noise. Aggregates are easily formed, but by adding an appropriate amount of flaky graphite particles to the friction material composition, the flaky graphite particles are also taken into the generated wear powder, and lubricity is imparted to the wear powder itself. Therefore, the wear powder is easily discharged without accumulating on the unevenness.
- the friction material of the present invention is usually used as a friction material in addition to the above non-whisker-like titanate, zirconium oxide having an average particle size of 1.0 to 4.0 ⁇ m, cleavage mineral particles, and flaky graphite particles.
- the friction material composition includes a binder, a fiber base material, a lubricant, an inorganic friction modifier, an organic friction modifier, a pH adjuster, a filler, and the like.
- Binders include straight phenol resins, resins obtained by modifying phenol resins with various elastomers such as cashew oil, silicone oil, acrylic rubber, and aralkyl-modified phenol resins obtained by reacting phenols, aralkyl ethers and aldehydes. , And binders commonly used for friction materials such as thermosetting resins in which various elastomers, fluoropolymers, etc. are dispersed in phenolic resins. These may be used alone or in combination of two or more. it can.
- the content of the binder is preferably 5 to 8% by weight, more preferably 6 to 7% by weight, based on the total amount of the friction material composition.
- the fiber base material examples include organic fibers usually used for friction materials such as aramid fibers, cellulose fibers, poly-paraphenylenebenzobisoxazole fibers, acrylic fibers, and the like. These may be used alone or in combination of two or more. Can be used in combination.
- the content of the fiber base material is preferably 1 to 4% by weight, more preferably 2 to 3% by weight, based on the total amount of the friction material composition.
- carbonaceous lubricants such as petroleum coke, artificial graphite particles, natural graphite particles, molybdenum disulfide, zinc sulfide, tin sulfide, composite metal sulfide, etc. Examples thereof include metal sulfide-based lubricants, and these may be used alone or in combination of two or more.
- the lubricant is preferably 4 to 8% by weight, more preferably 5 to 7% by weight based on the total amount of the friction material composition together with the flaky graphite particles.
- inorganic friction modifier examples include zirconium oxide having an average particle diameter of 1.0 to 4.0 ⁇ m and cleaving mineral particles having an average particle diameter of 300 to 600 ⁇ m, calcium silicate, magnesium oxide, ⁇ -alumina, Particulate inorganic friction modifiers such as zirconium silicate, and fibrous inorganic friction modifiers such as wollastonite, sepiolite, basalt fiber, glass fiber, biosoluble artificial mineral fiber, rock wool, etc. Can be used alone or in combination of two or more.
- the content of the inorganic friction modifier is combined with the above-mentioned zirconium oxide having an average particle size of 1.0 to 4.0 ⁇ m and the cleaving mineral particles having an average particle size of 300 to 600 ⁇ m with respect to the total amount of the friction material composition. It is preferably 25 to 40% by weight, and more preferably 30 to 35% by weight.
- Organic friction modifiers include organic materials commonly used for friction materials such as cashew dust, pulverized tire tread rubber, vulcanized rubber powder such as nitrile rubber, acrylic rubber, silicone rubber, butyl rubber, or unvulcanized rubber powder.
- a friction modifier is mentioned, These can be used individually by 1 type or in combination of 2 or more types.
- the content of the organic friction modifier is preferably 4 to 8% by weight, more preferably 5 to 7% by weight, based on the total amount of the friction material composition.
- the friction material used for the disc brake of the present invention is a mixing step in which a predetermined amount of the friction material composition is uniformly mixed using a mixer, and the obtained friction material raw material mixture is separately cleaned in advance. Processed and stacked with a back plate coated with adhesive, put into a thermoforming mold, heat-pressed to form by heating and pressurization, heating the resulting molded product to complete the curing reaction of the binder It is manufactured through a heat treatment process, a coating process for coating paint, a paint baking process for baking paint, and a polishing process for forming a friction surface.
- granulation step for granulating the friction material raw material mixture kneading step for kneading the friction material raw material mixture, granulation obtained in the friction material raw material mixture or granulation step
- the preform and the kneaded product obtained in the kneading process are put into a preforming mold, and a preforming process for molding the preform is performed, and the scorch process is performed after the heat and pressure molding process.
Abstract
Description
(a)銅成分が摩擦材に添加されていると、相手材表面に形成される銅の移着被膜と摩擦材表面との銅成分の凝着摩耗が支配的となるため相手材の摩耗粉は発生しにくいが、銅成分を排除すると、摩擦材に含まれる研削系の無機摩擦調整材によるアブレシブ摩耗が支配的となり、相手材の摩耗粉が発生しやすくなる。そして、相手材の摩耗粉により摩擦材の表面も研削されるため、摩擦材の摩耗粉の発生が促進される。
pH調整材は、摩擦材組成物全量に対して1~5重量%とするのが好ましく、2~4重量%とするのがより好ましい。
表1、表2に示す組成の摩擦材組成物をレディゲミキサーにて5分間混合し、成型金型内で30MPaにて10秒間加圧して予備成型をした。この予備成型物を、予め洗浄、表面処理、接着材を塗布した鋼鉄製のバックプレート上に重ね、熱成型型内で成型温度150℃、成型圧力40MPaの条件下で10分間成型した後、200℃で5時間熱処理(後硬化)を行い、研磨して摩擦面を形成し、乗用車用ディスクブレーキパッドを作製した(実施例1~20、比較例1~8)。
Claims (3)
- ディスクブレーキパッドに使用される、銅成分を含まないNAO材の摩擦材組成物を成型した摩擦材において、前記摩擦材組成物は、鉄成分を実質的に含まず、チタン酸塩として、非ウィスカー状のチタン酸塩を摩擦材組成物全量に対し15~25重量%と、無機摩擦調整材として、平均粒子径が1.0~4.0μmの酸化ジルコニウムを摩擦材組成物全量に対し15~25重量%と、無機摩擦調整材として劈開性鉱物粒子を摩擦材組成物全量に対し4~6重量%含むことを特徴とする摩擦材。
- 前記非ウィスカー状のチタン酸塩が不定形状のチタン酸カリウムであることを特徴とする請求項1に記載の摩擦材。
- 前記摩擦材組成物は、炭素質系潤滑材として、薄片状黒鉛粒子を摩擦材組成物全量に対し2~4重量%含むことを特徴する請求項1または請求項2に記載の摩擦材。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201580040926.6A CN106574169B (zh) | 2014-08-01 | 2015-07-22 | 摩擦材料 |
EP15826553.8A EP3187562B1 (en) | 2014-08-01 | 2015-07-22 | Friction material |
US15/500,516 US9920806B2 (en) | 2014-08-01 | 2015-07-22 | Friction material |
KR1020177005303A KR102497665B1 (ko) | 2014-08-01 | 2015-07-22 | 마찰재 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2014-157769 | 2014-08-01 | ||
JP2014157769A JP5963814B2 (ja) | 2014-08-01 | 2014-08-01 | 摩擦材 |
Publications (1)
Publication Number | Publication Date |
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WO2016017488A1 true WO2016017488A1 (ja) | 2016-02-04 |
Family
ID=55217389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2015/070778 WO2016017488A1 (ja) | 2014-08-01 | 2015-07-22 | 摩擦材 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9920806B2 (ja) |
EP (1) | EP3187562B1 (ja) |
JP (1) | JP5963814B2 (ja) |
KR (1) | KR102497665B1 (ja) |
CN (1) | CN106574169B (ja) |
WO (1) | WO2016017488A1 (ja) |
Cited By (6)
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WO2017170560A1 (ja) * | 2016-03-29 | 2017-10-05 | 日立化成株式会社 | 摩擦材組成物 |
WO2017183618A1 (ja) * | 2016-04-20 | 2017-10-26 | 株式会社アドヴィックス | 非石綿系摩擦材 |
JP2018162385A (ja) * | 2017-03-27 | 2018-10-18 | 日立化成株式会社 | 摩擦材組成物、摩擦材組成物を用いた摩擦材および摩擦部材 |
US10233988B2 (en) | 2015-09-23 | 2019-03-19 | Akebono Brake Industry Co., Ltd | Friction material |
EP3321338B1 (en) | 2016-04-21 | 2021-04-14 | Hitachi Chemical Co., Ltd. | Friction material composition, and friction material and friction member each obtained therefrom |
US11626453B2 (en) | 2018-08-27 | 2023-04-11 | Dongwoo Fine-Chem Co., Ltd. | Color filter, and method of manufacturing same |
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JP2018172496A (ja) * | 2017-03-31 | 2018-11-08 | 日立化成株式会社 | 摩擦材組成物 |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
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US10233988B2 (en) | 2015-09-23 | 2019-03-19 | Akebono Brake Industry Co., Ltd | Friction material |
US10690207B2 (en) | 2015-09-23 | 2020-06-23 | Akebono Brake Industry Co., Ltd | Friction material |
US11092205B2 (en) | 2015-09-23 | 2021-08-17 | Akebono Brake Industry Co., Ltd. | Friction material |
US11879513B2 (en) | 2015-09-23 | 2024-01-23 | Akebono Brake Industry Co., Ltd. | Friction material |
WO2017170560A1 (ja) * | 2016-03-29 | 2017-10-05 | 日立化成株式会社 | 摩擦材組成物 |
JPWO2017170560A1 (ja) * | 2016-03-29 | 2019-04-11 | 日立化成株式会社 | 摩擦材組成物 |
US10612614B2 (en) | 2016-03-29 | 2020-04-07 | Hitachi Chemical Company, Ltd. | Friction material composition |
WO2017183618A1 (ja) * | 2016-04-20 | 2017-10-26 | 株式会社アドヴィックス | 非石綿系摩擦材 |
CN109072046A (zh) * | 2016-04-20 | 2018-12-21 | 株式会社爱德克斯 | 非石棉系摩擦材料 |
EP3321338B1 (en) | 2016-04-21 | 2021-04-14 | Hitachi Chemical Co., Ltd. | Friction material composition, and friction material and friction member each obtained therefrom |
JP2018162385A (ja) * | 2017-03-27 | 2018-10-18 | 日立化成株式会社 | 摩擦材組成物、摩擦材組成物を用いた摩擦材および摩擦部材 |
US11626453B2 (en) | 2018-08-27 | 2023-04-11 | Dongwoo Fine-Chem Co., Ltd. | Color filter, and method of manufacturing same |
Also Published As
Publication number | Publication date |
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KR20170039228A (ko) | 2017-04-10 |
EP3187562A4 (en) | 2018-03-07 |
KR102497665B1 (ko) | 2023-02-09 |
JP2016035005A (ja) | 2016-03-17 |
US20170219037A1 (en) | 2017-08-03 |
EP3187562A1 (en) | 2017-07-05 |
US9920806B2 (en) | 2018-03-20 |
EP3187562B1 (en) | 2021-09-08 |
CN106574169B (zh) | 2019-05-03 |
JP5963814B2 (ja) | 2016-08-03 |
CN106574169A (zh) | 2017-04-19 |
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