CN1962804A - Non-asbestos friction materials - Google Patents

Non-asbestos friction materials Download PDF

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Publication number
CN1962804A
CN1962804A CNA2006101385261A CN200610138526A CN1962804A CN 1962804 A CN1962804 A CN 1962804A CN A2006101385261 A CNA2006101385261 A CN A2006101385261A CN 200610138526 A CN200610138526 A CN 200610138526A CN 1962804 A CN1962804 A CN 1962804A
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CN
China
Prior art keywords
fiber
friction
friction materials
carbon
asbestos
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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
Application number
CNA2006101385261A
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Chinese (zh)
Inventor
郑根仲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hankook Tire and Technology Co Ltd
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Hankook Tire Co Ltd
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Publication date
Application filed by Hankook Tire Co Ltd filed Critical Hankook Tire Co Ltd
Publication of CN1962804A publication Critical patent/CN1962804A/en
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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
    • C09K3/1454—Abrasive powders, suspensions and pastes for polishing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/08—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels using fluid or powdered medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82B—NANOSTRUCTURES FORMED BY MANIPULATION OF INDIVIDUAL ATOMS, MOLECULES, OR LIMITED COLLECTIONS OF ATOMS OR MOLECULES AS DISCRETE UNITS; MANUFACTURE OR TREATMENT THEREOF
    • B82B3/00—Manufacture or treatment of nanostructures by manipulation of individual atoms or molecules, or limited collections of atoms or molecules as discrete units
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • C01G23/04—Oxides; Hydroxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G39/00—Compounds of molybdenum
    • C01G39/02—Oxides; Hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Nanotechnology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Transportation (AREA)
  • Braking Arrangements (AREA)

Abstract

This invention provideed a nonasbestos friction material, which included nm carbon fiber, molybdena, titanium oxide. The nonasbestos friction material in this invention not use compound of antimony and sulfid, braking performance is well, and noise is little.

Description

Non-asbestos friction material
Technical field
The present invention relates to non-asbestos friction material, particularly do not use the non-asbestos friction material favourable of antimony or sulfide environment.
Background technology
The automotive friction material (or claims Brake pad: BRAKE PAD) have following function: rub with the wheel disc of its relative material, kinetic energy is converted to heat energy, make the car deceleration in travelling or stop.Raw material as the friction materials with this function has kind more than 200, and adopts 10 to 30 plurality of raw materials to make the automotive friction material.
The raw material of friction materials is divided into fiber, resin and weighting agent substantially, and wherein weighting agent is divided into inorganic filler and organic filler again.Whether the past is not considered favourable to environment when using the raw material of friction materials.But nearest exploitation trend shows that using becomes main flow to the favourable raw material of environment.
As representative, developed alternative asbestos and adopted the non-asbestos friction material of fiber.Adopt the friction materials of fiber to be called non-asbestos friction material (NAO, Non AsbestosOrganics) with substituting asbestos, it can be divided into semi-metal class, low iron class and non-metal kind.
The fiber that substitutes asbestos has:
-steel fiber: iron fiber, copper fiber, aluminum fiber etc.
-inorganic fibre: rock wool, sepiolite etc.
-organic fibre: Kevlar, acrylic fibre, cellulosic fibre, carbon fiber etc.
Carbon fiber is a kind of of organic fibre, has excellent high-temperature stability, use widely flyer with friction plate on or used as disk rotor, use widely at a high speed and on the disk rotor or brake facing of the sport car often of bringing to a halt.Carbon fiber has needle-like staple fibre shape, and the carbon fiber-reinforced carbon composite (C/C) that is used for heat-curing resin is done matrix (Matrix) uses.And in carbon nano fiber, not only its composition plays lubricant with the composition as the carbon series lubricant agent, and because its needle-like has fiber (Fibrous) structure, so also have advantage aspect the raising braking ability.
The exploitation of environment-friendly type friction materials not only concentrates on the exploitation of the non-asbestos friction material that uses the fiber that substitutes asbestos, and concentrates on the exploitation to the favourable raw material of environment that is used for friction materials.As representational raw material, a kind of is as lubricant or the widely used Sb of abrasive 2O 3Or Sb 2S 3The antimony compounds, another kind is a sulfide.
Jangs etc. said, MoS 2React with airborne oxygen and water, produce sulfuric acid, cause acid corrosion, increase the wearing and tearing (SAE Paper 982235) of wheel disc.
The representational method of the development technique of relevant environment-friendly type friction materials is listed below.
The first, as day of daybreak (Akebono) as described in disclosure patent of invention 2003-322183 number, developed and do not comprised copper metalloid or heavy metal, at high temperature braking ability and physical strength excellent friction material.Wherein, the ratio of MgO/ graphite is adjusted, used carbon fiber and aluminium oxide-silicon oxide class ceramic fiber etc.
The second, as day of Ri Xinmo (Nisshinbo) as described in disclosure patent of invention 2003-313312 number, developed the friction materials that does not comprise antimony (Sb) and plumbous (Pb) compound.Part is used zinc sulphide, cupric sulfide, tin sulfide, manganese sulfide, iron sulphide sulfides.
In addition, use the technology of carbon nano fiber open in day disclosure patent of invention 2004-308776 communique.Under the situation that carbon fiber is used as strengthening material, except above-mentioned carbon fiber, also use carbon nano fiber or spherical shell soccerballene (Fullerene), under the situation of carbon material, use carbon nano fiber or soccerballene as strengthening material (C/C) use.
Summary of the invention
Therefore, the object of the present invention is to provide and a kind ofly do not use antimony compounds or sulfide, and braking is good, the low noise automobile friction materials of noise takes place hardly.
Non-asbestos friction material of the present invention comprises: organic fibre, steel fiber, inorganic fibre, couplant, abrasive, lubricant, friction regulator, weighting agent, comprise the carbon nano fiber (Nano Carbon Fiber) of 0.2～10 volume % as lubricant, comprise the molybdenum oxide (MoO of 0.5～10 volume % as friction regulator 3), comprise the titanium oxide (TiO of 0.5～10 volume % as abrasive 2).
Description of drawings
Fig. 1 is the electron micrograph that is used for representing the needle-like metal fibrous texture;
Fig. 2 is the electron micrograph that is used for representing the needle inorganic fibrous texture;
Fig. 3 is the electron micrograph that is used for representing fibrous carbon nano fiber structure;
Fig. 4 is the chart of the high speed braking characteristic (before weakening) of expression embodiments of the invention and comparative example;
Fig. 5 is the chart of the high speed braking characteristic (weakening the back) of expression embodiments of the invention and comparative example;
Fig. 6 is the chart of the noise properties of expression embodiments of the invention and comparative example.
Embodiment
Antimony compounds (Sb 2O 3, Sb 2S 3) or sulfide (Sb 2S 3, MoS 2, FeS) be extensive use of mainly as lubricant, in the raw material of friction materials, under the situation of not using above-claimed cpd, the possibility that produces noise is big.
The carbon nano fiber of Shi Yonging has lubrication, and can substitute the lubricant of harmful sulfide by constituting with the carbon of past as the identical composition of the graphite of lubricant use in the present invention.In addition, carbon nano fiber has filamentary structure, has the excellent lubrication characteristic, has the effect that can improve antiwear characteristic simultaneously.
If the structure to the fiber that uses in carbon nano fiber structure and the prior art compares, then as Fig. 1～shown in Figure 3.Fig. 1 is the needle-like metal fiber, and Fig. 2 is the needle inorganic fiber.In addition, Fig. 3 is the fibrous nano carbon fiber.
Titanium oxide (the TiO of Shi Yonging in the present invention 2) be chemical property and the highly stable material of physical properties, be widely used as the white pigment of excellent corrosion resistance, these two kinds of rutile (Rutile) and anatase octahedrites (Anatase) are arranged.Its hardness also has the function of abrasive in 5.5～7.0 scope.
In the present invention, use Kevlar, acrylic fibre, carbon fiber, use iron fiber, copper fiber, aluminum fiber as steel fiber as the organic fibre of the composition of general friction materials.In addition, use asbestos, sepiolite, rock wool (Rock Wool) etc. as inorganic fibre.
As other couplant, use phenolic resin, also can use unmodified resin or modified resin, but the preferred modified resin that uses.Use rubber powder, cashew nut ash (Cashwew Dust), coke as friction regulator, can use barium sulfate (BaSO as weighting agent 4), calcium hydroxide (Ca (OH) 2).
The manufacture method of friction materials is according to the difference of raw material and difference.Under the situation of using liquid raw material, can adopt cold forming method.Under the situation of using solid material, can adopt dry formed method.In the present invention, adopt the dry formed method material that creates friction.At first raw material is mixed, carry out one-step forming just, on its basis, carry out thermoforming, thermal treatment and grinding in order, and check.Then, pack.
In said process, the main strange reverse-flow mixer of Airy (Eirich Mixer), labor enlightening mixer (Rodige Mixer), the prosperous breath that mixer (HenschelMixer) of using in the mixing of friction materials.Wherein, preferred your mixer (Henschel Mixer) of prosperous breath that uses separates mixing.For the dispersing nanometer carbon fiber, when mixing for the first time, carbon nano fiber and organic fibre are mixed together, afterwards, put into remaining raw material and mix the second time.Carrying out under this blended situation, equably the dispersing nanometer carbon fiber.
Below, according to embodiments of the invention, further describe the present invention.
Embodiment
Raw material mixture table according to following table 1 is mixed, with the material that creates friction.
The blended mode is according to adopting prosperous your mixer of breath to mix with organic fibre carbon nano fiber when mixing for the first time, putting into remaining raw material for the second time and mix.
Pilot scale test machine (scale tester) is adopted in the evaluation of the frictional coefficient of the friction materials of Zhi Zaoing and noise in the present embodiment.The pilot scale test machine not only can be estimated frictional coefficient when braking, but and owing to FFT (FFT, Fast Fourier Transform), so can when braking each time, estimate noise.Evaluation method is that the basis is estimated with JASO C406 Mode.
Comparative example
Raw material mixture table according to following table 1 is mixed, with the material that creates friction.Hybrid mode is to adopt prosperous your mixer of breath to mix with organic fibre carbon nano fiber when mixing for the first time, puts into remaining raw material for the second time and mixes.
The pilot scale test machine is adopted in the frictional coefficient of the friction materials of making in this comparative example and the evaluation of noise.The pilot scale test machine not only can be estimated frictional coefficient when braking, but and owing to FFT (FFT, Fast Fourier Transform), so can when braking each time, estimate noise.Evaluation method is that the basis is estimated with JASO C406 Mode.
Table 1 (unit: volume %)
Composition Embodiment Comparative example
Organic fibre (Kevlar, acrylic fibre) 8 8
Steel fiber (steel fiber, aluminum fiber) 5 5
Inorganic fibre (rock wool) 20 20
Carbon nano fiber 2 0
Couplant (rubber modified resin) 15 15
Sb 2O 3 0 2
TiO 2 2 0
MoO 3 2 0
Sb 2S 3 0 2
MoS 2 0 2
Friction regulator (abrasive, lubricant etc.) 31 31
BaSO 4 15 15
Add up to 100 100
According to frictional coefficient and noise evaluation structure to the friction materials made by the foregoing description and comparative example is as follows.
Table 2
Distinguish Embodiment Comparative example
Frictional coefficient (on average) 0.414 0.416
Frictional coefficient (100kph, 0.3g) 0.424 0.447
Weaken (Fade) *Minimum frictional coefficient 0.325 0.347
Noise frequency (more than the 50dB) 0 time 7 times
*Weaken situation: during rubbing, the situation that frictional coefficient sharply reduces
According to embodiments of the invention, in non-asbestos friction material, use Nano carbon fibers peacekeeping titanium oxide the environment-friendly type friction materials average friction coefficient with contain Sb 2S 3Friction materials etc. objectionable impurities demonstrates peer-level.In addition, (100km/h) braking ability is because little with the reduction of the frictional coefficient of retarded velocity, so demonstrate than the friction materials stable properties that contains objectionable impurities (with reference to Fig. 4, Fig. 5) at a high speed.The noise that takes place when braking is compared minimizing (with reference to Fig. 6) with comparative example.Fig. 4 is the chart that the high speed braking characteristic (before weakening) to embodiments of the invention and comparative example compares in the accompanying drawings.The chart that Fig. 5 compares for the high speed braking characteristic (weakening the back) to embodiments of the invention and comparative example.In addition, the chart of Fig. 6 for the noise properties of embodiments of the invention and comparative example is compared.
Thus, non-asbestos friction material of the present invention uses Nano carbon fibers peacekeeping titanium oxide by not using antimony compounds and sulfide, thus, has the effect that braking ability is good, noise is little.

Claims (1)

1. non-asbestos friction material, comprise: organic fibre, steel fiber, inorganic fibre, couplant, abrasive, lubricant, friction regulator, weighting agent, it is characterized in that, the carbon nano fiber that comprises 0.2～10 volume % as lubricant, comprise the molybdenum oxide of 0.5～10 volume % as friction regulator, comprise the titanium oxide of 0.5～10 volume % as abrasive.
CNA2006101385261A 2005-11-07 2006-11-07 Non-asbestos friction materials Pending CN1962804A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020050105896A KR100644262B1 (en) 2005-11-07 2005-11-07 Non-asbestos friction materials
KR1020050105896 2005-11-07

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CN1962804A true CN1962804A (en) 2007-05-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102382626A (en) * 2011-08-25 2012-03-21 东营博瑞制动系统有限公司 Formula of carbon fiber based friction material and manufacturing method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101355781B1 (en) * 2009-06-01 2014-01-24 히타치가세이가부시끼가이샤 Friction material composition, friction material obtained from same, and friction member
CN102808878B (en) * 2012-09-05 2014-10-29 杭州吉成汽车零部件有限公司 Carbon-based friction material for drum brake of light passenger vehicle and preparation method of carbon-based friction material

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR910004980B1 (en) * 1988-12-31 1991-07-20 한일시멘트공업 주식회사 Brake lining
KR960015720B1 (en) * 1992-08-28 1996-11-20 현대자동차 주식회사 Brake lining
JPH0726031A (en) * 1993-07-07 1995-01-27 Kubota Corp Friction material
JP2004217828A (en) 2003-01-16 2004-08-05 Nissin Kogyo Co Ltd Friction material
KR100558706B1 (en) * 2004-01-31 2006-03-10 학교법인고려중앙학원 Non-asbestos brake lining
KR100639883B1 (en) * 2004-11-16 2006-10-30 한국타이어 주식회사 Friction material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102382626A (en) * 2011-08-25 2012-03-21 东营博瑞制动系统有限公司 Formula of carbon fiber based friction material and manufacturing method thereof

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Open date: 20070516