CN108626281A - A kind of no asbestos anti-jitter clutch surface and its production technology - Google Patents
A kind of no asbestos anti-jitter clutch surface and its production technology Download PDFInfo
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- CN108626281A CN108626281A CN201810442437.9A CN201810442437A CN108626281A CN 108626281 A CN108626281 A CN 108626281A CN 201810442437 A CN201810442437 A CN 201810442437A CN 108626281 A CN108626281 A CN 108626281A
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- asbestos
- face sheet
- clutch
- grinding
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- 239000010425 asbestos Substances 0.000 title claims abstract description 35
- 229910052895 riebeckite Inorganic materials 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000005516 engineering process Methods 0.000 title claims abstract description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000011347 resin Substances 0.000 claims abstract description 44
- 229920005989 resin Polymers 0.000 claims abstract description 44
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 34
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 34
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 26
- 239000007767 bonding agent Substances 0.000 claims abstract description 23
- 239000002562 thickening agent Substances 0.000 claims abstract description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000011521 glass Substances 0.000 claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000010439 graphite Substances 0.000 claims abstract description 18
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 238000011282 treatment Methods 0.000 claims abstract description 18
- 230000002787 reinforcement Effects 0.000 claims abstract description 16
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims abstract description 16
- 229960001763 zinc sulfate Drugs 0.000 claims abstract description 16
- 229910000368 zinc sulfate Inorganic materials 0.000 claims abstract description 16
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 13
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 8
- 230000008859 change Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 39
- 238000000227 grinding Methods 0.000 claims description 35
- 239000000203 mixture Substances 0.000 claims description 23
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 210000001161 mammalian embryo Anatomy 0.000 claims description 15
- 238000002360 preparation method Methods 0.000 claims description 15
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 14
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 14
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 14
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 12
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 10
- 238000004806 packaging method and process Methods 0.000 claims description 10
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 229920003090 carboxymethyl hydroxyethyl cellulose Polymers 0.000 claims description 9
- 229920000609 methyl cellulose Polymers 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000003712 anti-aging effect Effects 0.000 claims description 7
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 7
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 6
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 6
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 5
- 229920000459 Nitrile rubber Polymers 0.000 claims description 5
- ZGBSOTLWHZQNLH-UHFFFAOYSA-N [Mg].S(O)(O)(=O)=O Chemical compound [Mg].S(O)(O)(=O)=O ZGBSOTLWHZQNLH-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000010348 incorporation Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 235000019359 magnesium stearate Nutrition 0.000 claims description 5
- 238000003801 milling Methods 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 5
- 239000005011 phenolic resin Substances 0.000 claims description 5
- 229920000058 polyacrylate Polymers 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 2
- 229920002678 cellulose Polymers 0.000 claims 2
- 239000001913 cellulose Substances 0.000 claims 2
- 235000010980 cellulose Nutrition 0.000 claims 2
- 239000001301 oxygen Substances 0.000 claims 2
- 229910052760 oxygen Inorganic materials 0.000 claims 2
- LNAZSHAWQACDHT-XIYTZBAFSA-N (2r,3r,4s,5r,6s)-4,5-dimethoxy-2-(methoxymethyl)-3-[(2s,3r,4s,5r,6r)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6r)-4,5,6-trimethoxy-2-(methoxymethyl)oxan-3-yl]oxyoxane Chemical compound CO[C@@H]1[C@@H](OC)[C@H](OC)[C@@H](COC)O[C@H]1O[C@H]1[C@H](OC)[C@@H](OC)[C@H](O[C@H]2[C@@H]([C@@H](OC)[C@H](OC)O[C@@H]2COC)OC)O[C@@H]1COC LNAZSHAWQACDHT-XIYTZBAFSA-N 0.000 claims 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 claims 1
- 230000005484 gravity Effects 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 238000003825 pressing Methods 0.000 claims 1
- 238000002679 ablation Methods 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 239000004033 plastic Substances 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 abstract description 3
- 230000036039 immunity Effects 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 239000001923 methylcellulose Substances 0.000 description 8
- 235000010981 methylcellulose Nutrition 0.000 description 8
- 239000003963 antioxidant agent Substances 0.000 description 4
- 230000003078 antioxidant effect Effects 0.000 description 4
- 229910052810 boron oxide Inorganic materials 0.000 description 4
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 4
- -1 hydroxypropyl methyl Chemical group 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000002783 friction material Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 210000004072 lung Anatomy 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 208000033116 Asbestos intoxication Diseases 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 206010003441 asbestosis Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 230000007541 cellular toxicity Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 201000005202 lung cancer Diseases 0.000 description 1
- 230000005980 lung dysfunction Effects 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 208000006178 malignant mesothelioma Diseases 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 229920005596 polymer binder Polymers 0.000 description 1
- 239000002491 polymer binding agent Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- 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
- F16D69/027—Compositions based on metals or inorganic oxides
-
- 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
-
- 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
- F16D2200/0004—Materials; Production methods therefor metallic
- F16D2200/0026—Non-ferro
-
- 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
-
- 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
-
- 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
- F16D2200/0082—Production methods therefor
- F16D2200/0086—Moulding materials together by application of heat and pressure
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a kind of no asbestos anti-jitter clutch surface and its production technologies, using albronze thread reinforcement, thickener, tackifying resin, bonding agent, copper powder, glass putty, iron oxide, calcium sulfate, magnesium sulfate, zinc sulfate, aluminium oxide, graphite as raw material, change traditional car clutch face sheet formula, the proportion of stringent control each component, is added the larger metal powder of density：Copper powder, glass putty, and hard particles are added, after being heat-treated, intensive treatment, performance indicator again are carried out to the surface of clutch surface and are significantly better than the corresponding index of former car clutch face sheet, under the conditions of working long hours or limiting condition, reduce as caused by abnormal friction clutch surface surface fracture, skidding, ablation and plastic deformation generation, clutch surface Wear Resistance energy is greatly improved, clutch surface does not easily cause contraction, and jitter immunity can be good.
Description
Technical field
The present invention relates to Clutch Technology field more particularly to a kind of no asbestos anti-jitter clutch surface and its production works
Skill.
Background technology
Clutch surface is a kind of macromolecule trielement composite material, mainly by high polymer binder（Resin and rubber）, increase
Strong material, friction filler three categories component and other compounding agents composition, through a series of product made of production and processings.Due to automobile
Industry flourishes, and requirement to braking system is also more stringent, so friction material will compliance requirements, on the one hand must
The property indices that should reach when must meet vehicle transmission, on the other hand must satisfy it is safe to use, comfortable steady, to human body
It is harmless, environmentally safe, also there is the effect of energy-saving consumption-reducing.International Labour Organization statistics indicate that, the annual whole world is at least
There are 100,000 people to die of disease caused by asbestos, this number is all increasing every year.Expert claims that breakage occurs when the material for containing asbestos
When, tiny fiber enters air and generates pollution.After asbestos fibre enters air, physical damnification and thin can be generated to human body
Cellular toxicity, and then asbestosis can be caused, the systemic disease based on full lung diffuse fibrousization is mainly shown as cough, exhales
Inhale difficult and serious pulmonary dysfunction.Asbestos fibre deposits in lung can cause lung cancer and malignant mesothelioma, nearly all quotient
Asbestos in product all have carcinogenicity.In addition the heat resistance of asbestos is bad, when heating temperature reaches 400 DEG C or more, machine
Tool intensity drastically declines.Therefore exploitation becomes Automotive Friction Material industry key project without asbestos product.Anti-jitter is garage
The another challenge of industry, shakes when driving, can cause uncertainty that is frightened at heart and increasing safe driving, can also influence
The service life of automobile other component, and comfort level is also had a greatly reduced quality, so the friction material that jitter immunity can be good is more by blueness
It looks at.
For this purpose, application No. is disclosed in CN201410257573.2 without asbestos anti-jitter clutch face sheet for cars and its life
Production. art has good heat resistance and higher mechanical strength, and wearability is good, and thermal expansion is small, and jitter immunity can be good.
But said program still has certain defect, under the conditions of working long hours or limiting condition, is easy hair
How the raw failures such as clutch surface surface fracture, skidding, ablation and plastic deformation as caused by abnormal friction, invent a kind of nothing
Asbestos anti-jitter clutch surface and its production technology solve these problems, and it is urgently to be resolved hurrily to become those skilled in the art
Problem.
Invention content
The purpose of the present invention is to solve disadvantage existing in the prior art, and a kind of no asbestos anti-jitter proposed from
Clutch dough sheet and its production technology.
To achieve the goals above, present invention employs following technical solutions：
A kind of no asbestos car clutch face sheet, raw material are as follows by weight：15~25 parts of albronze thread reinforcement, thickening
2~4 parts of agent, 3~4 parts of tackifying resin, bonding agent 15~35,7~13 parts of copper powder, 5~15 parts of glass putty, 2~4 parts of iron oxide, sulphur
3~5 parts of sour calcium, 7~11 parts of magnesium sulfate, 5~13 parts of zinc sulfate, 5~9 parts of aluminium oxide, 7~13 parts of graphite.
Preferably, the thickener is that methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl are fine
Tie up the mixture of element, and the mixing ratio of methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose
Weight is 1:3:2:2.
Preferably, the tackifying resin has excellent polymer compatibility, each component institute accounting wherein in tackifying resin
Example be：Dimethyl methyl acid resin 60%, phenolphthalein resin 25%, 201 resins 15%, each component proportion is in the old agent：It is anti-old
Agent CPPD50%, anti-aging agent RD 25%, antioxidant D 25%.
Preferably, it is 10~20% water soluble phenol resin and 6~15% powder by weight that the bonding agent, which is used,
What last nitrile rubber mixed.
A kind of production technology of no asbestos car clutch face sheet, includes the following steps：
S1：Albronze thread reinforcement, thickener, tackifying resin, bonding agent, copper powder, glass putty, iron oxide, calcium sulfate, sulfuric acid
Magnesium, zinc sulfate, aluminium oxide, graphite weigh spare in proportion；
S2：Copper powder, glass putty, iron oxide, calcium sulfate, magnesium sulfate, zinc sulfate, aluminium oxide, graphite in step S1 is added to and is ground
It in grinding barrel, is ground using grinding drum, material is mixed fully, milling time is between 0.5h-0.6h, grinding temperature control
Between 45-85 degrees Celsius, the rotating speed of grinder is 1000-1200 revs/min, and grinding collects mixed material after terminating standby
With raw material is sealed, and obtains mix preparation A；
S3：Thickener, tackifying resin, bonding agent in step S1 is added in grinding drum successively, is ground using grinding drum
Mill mixes material fully, and control mixing temperature controls incorporation time between 0.2h-0.3h between 42-52 degrees Celsius,
The rotating speed of stirring motor is controlled at 1100-1200 revs/min, obtains mix preparation B, mix preparation B is sticky slurry；
S4：Slurry is immersed in by treating tank in albronze thread reinforcement, is then dried and is weighed, and is reused wrapping machine and is twined
It is coiled into blank, is then placed in mold, in control environment temperature between 5-45 degrees Celsius, under 100-600MPa pressure, pressurize
15~25 minutes；
50~70MPa of repressurization, and cold moudling after pressurize 15~25 minutes；
Molding embryo material is demoulded, the embryo material of demoulding is placed in sintering furnace and is fired into according to selected basis material sintering process
Part takes out product and suppresses required blank, blank is taken out, and collection is spare, is further processed；
S5：After being heat-treated, it is that 8.8%~9.2% copper acetate is water-soluble that molding embryo material in step S4, which is immersed in mass fraction,
28~32min of liquid heat-insulation soaking is simultaneously passed through ultrasonic wave and is ultrasonically treated, and drip liquid takes out, the condition that merging temperature is 77~81 DEG C
440~460s of lower steam treatment is warming up to 104~108 DEG C of continuation steam treatments 500 with the heating rate of 3.3~3.7 DEG C/min
~520s takes out, obtains pretreatment clutch friction plate；
10~12min of microwave drying treatment of clutch friction plate will be pre-processed, 8~10min in coating solution is immersed in, takes
Go out, secondary microwave be dried 18~20min, take out, vacuum degree be 140~160MPa under conditions of be vacuum-treated 55~
60min。
S6：It is handled using grinding, you can obtain no asbestos anti-jitter clutch surface；
S7：Packaging and storage carry out quantitative sealed packaging using packing machine, and the humidity of storage environment is no more than 65%, environment temperature
No more than 70 degrees Celsius.
Preferably, the coating solution in the step S5, is made of the raw material of following parts by weight：Carboxymethyl cellulose 11~12
Part, 8~9 parts of magnesium stearate, 5.6~6.2 parts of boron oxide, 14~15 parts of polyacrylate, 17~18 parts of aluminum nitrate, calcium boride
9.3~9.7 parts, 120~140 parts of water.
A kind of no asbestos anti-jitter clutch surface provided by the invention and its production technology are enhanced with albronze line
Body, thickener, tackifying resin, bonding agent, copper powder, glass putty, iron oxide, calcium sulfate, magnesium sulfate, zinc sulfate, aluminium oxide, graphite are
Raw material changes traditional car clutch face sheet formula, and the larger metal powder of density is added in the stringent proportion for controlling each component：
Copper powder, glass putty, and hard particles are added, after being heat-treated, intensive treatment again, performance are carried out to the surface of clutch surface
Index is significantly better than the corresponding index of former car clutch face sheet, under the conditions of working long hours or limiting condition, reduce by
Clutch surface surface fracture caused by abnormal friction, skidding, ablation and plastic deformation generation, it is environmentally safe, make
It is simple for process, so that clutch surface piece performance is more stablized, skeleton frame core material and slurry combination effect are good, increase material distribution
Uniformity greatly improves clutch surface Wear Resistance energy, and clutch surface does not easily cause contraction, and the present invention has heat-resisting
Property may be up to 380 DEG C or more well, i.e., the characteristics of high temperature friction coefficient is stable, low wear rate, and the relevant production process pair of product
Human body has no stimulation.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
Embodiment 1
A kind of no asbestos car clutch face sheet, raw material are as follows by weight：15 parts of albronze thread reinforcement, thickener 2
Part, 3 parts of tackifying resin, bonding agent 15,7 parts of copper powder, 5 parts of glass putty, 2 parts of iron oxide, 3 parts of calcium sulfate, 7 parts of magnesium sulfate, zinc sulfate 5
Part, 5 parts of aluminium oxide, 7 parts of graphite.
Specifically, the thickener is that methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl are fine
Tie up the mixture of element, and the mixing ratio of methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose
Weight is 1:3:2:2.
Specifically, the tackifying resin has excellent polymer compatibility, each component institute accounting wherein in tackifying resin
Example be：Dimethyl methyl acid resin 60%, phenolphthalein resin 25%, 201 resins 15%, each component proportion is in the old agent：It is anti-old
Agent CPPD50%, anti-aging agent RD 25%, antioxidant D 25%.
Specifically, it is 10~20% water soluble phenol resin and 6~15% powder by weight that the bonding agent, which is used,
What last nitrile rubber mixed.
A kind of production technology of no asbestos car clutch face sheet, includes the following steps：
S1：Albronze thread reinforcement, thickener, tackifying resin, bonding agent, copper powder, glass putty, iron oxide, calcium sulfate, sulfuric acid
Magnesium, zinc sulfate, aluminium oxide, graphite weigh spare in proportion；
S2：Copper powder, glass putty, iron oxide, calcium sulfate, magnesium sulfate, zinc sulfate, aluminium oxide, graphite in step S1 is added to and is ground
It in grinding barrel, is ground using grinding drum, material is mixed fully, milling time is between 0.5h-0.6h, grinding temperature control
Between 45-85 degrees Celsius, the rotating speed of grinder is 1000-1200 revs/min, and grinding collects mixed material after terminating standby
With raw material is sealed, and obtains mix preparation A；
S3：Thickener, tackifying resin, bonding agent in step S1 is added in grinding drum successively, is ground using grinding drum
Mill mixes material fully, and control mixing temperature controls incorporation time between 0.2h-0.3h between 42-52 degrees Celsius,
The rotating speed of stirring motor is controlled at 1100-1200 revs/min, obtains mix preparation B, mix preparation B is sticky slurry；
S4：Slurry is immersed in by treating tank in albronze thread reinforcement, is then dried and is weighed, and is reused wrapping machine and is twined
It is coiled into blank, is then placed in mold, in control environment temperature between 5-45 degrees Celsius, under 100-600MPa pressure, pressurize
15~25 minutes；
50~70MPa of repressurization, and cold moudling after pressurize 15~25 minutes；
Molding embryo material is demoulded, the embryo material of demoulding is placed in sintering furnace and is fired into according to selected basis material sintering process
Part takes out product and suppresses required blank, blank is taken out, and collection is spare, is further processed；
S5：After being heat-treated, it is that 8.8%~9.2% copper acetate is water-soluble that molding embryo material in step S4, which is immersed in mass fraction,
28~32min of liquid heat-insulation soaking is simultaneously passed through ultrasonic wave and is ultrasonically treated, and drip liquid takes out, the condition that merging temperature is 77~81 DEG C
440~460s of lower steam treatment is warming up to 104~108 DEG C of continuation steam treatments 500 with the heating rate of 3.3~3.7 DEG C/min
~520s takes out, obtains pretreatment clutch friction plate；
10~12min of microwave drying treatment of clutch friction plate will be pre-processed, 8~10min in coating solution is immersed in, takes
Go out, secondary microwave be dried 18~20min, take out, vacuum degree be 140~160MPa under conditions of be vacuum-treated 55~
60min。
S6：It is handled using grinding, you can obtain no asbestos anti-jitter clutch surface；
S7：Packaging and storage carry out quantitative sealed packaging using packing machine, and the humidity of storage environment is no more than 65%, environment temperature
No more than 70 degrees Celsius.
Specifically, the coating solution in the step S5, is made of the raw material of following parts by weight：Carboxymethyl cellulose 11~12
Part, 8~9 parts of magnesium stearate, 5.6~6.2 parts of boron oxide, 14~15 parts of polyacrylate, 17~18 parts of aluminum nitrate, calcium boride
9.3~9.7 parts, 120~140 parts of water.
Embodiment 2
A kind of no asbestos car clutch face sheet, raw material are as follows by weight：20 parts of albronze thread reinforcement, thickener 3
Part, 3.5 parts of tackifying resin, bonding agent 25,10 parts of copper powder, 10 parts of glass putty, 3 parts of iron oxide, 4 parts of calcium sulfate, 9 parts of magnesium sulfate, sulphur
9 parts of sour zinc, 7 parts of aluminium oxide, 10 parts of graphite.
Specifically, the thickener is that methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl are fine
Tie up the mixture of element, and the mixing ratio of methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose
Weight is 1:3:2:2.
Specifically, the tackifying resin has excellent polymer compatibility, each component institute accounting wherein in tackifying resin
Example be：Dimethyl methyl acid resin 60%, phenolphthalein resin 25%, 201 resins 15%, each component proportion is in the old agent：It is anti-old
Agent CPPD50%, anti-aging agent RD 25%, antioxidant D 25%.
Specifically, it is 10~20% water soluble phenol resin and 6~15% powder by weight that the bonding agent, which is used,
What last nitrile rubber mixed.
A kind of production technology of no asbestos car clutch face sheet, includes the following steps：
S1：Albronze thread reinforcement, thickener, tackifying resin, bonding agent, copper powder, glass putty, iron oxide, calcium sulfate, sulfuric acid
Magnesium, zinc sulfate, aluminium oxide, graphite weigh spare in proportion；
S2：Copper powder, glass putty, iron oxide, calcium sulfate, magnesium sulfate, zinc sulfate, aluminium oxide, graphite in step S1 is added to and is ground
It in grinding barrel, is ground using grinding drum, material is mixed fully, milling time is between 0.5h-0.6h, grinding temperature control
Between 45-85 degrees Celsius, the rotating speed of grinder is 1000-1200 revs/min, and grinding collects mixed material after terminating standby
With raw material is sealed, and obtains mix preparation A；
S3：Thickener, tackifying resin, bonding agent in step S1 is added in grinding drum successively, is ground using grinding drum
Mill mixes material fully, and control mixing temperature controls incorporation time between 0.2h-0.3h between 42-52 degrees Celsius,
The rotating speed of stirring motor is controlled at 1100-1200 revs/min, obtains mix preparation B, mix preparation B is sticky slurry；
S4：Slurry is immersed in by treating tank in albronze thread reinforcement, is then dried and is weighed, and is reused wrapping machine and is twined
It is coiled into blank, is then placed in mold, in control environment temperature between 5-45 degrees Celsius, under 100-600MPa pressure, pressurize
15~25 minutes；
50~70MPa of repressurization, and cold moudling after pressurize 15~25 minutes；
Molding embryo material is demoulded, the embryo material of demoulding is placed in sintering furnace and is fired into according to selected basis material sintering process
Part takes out product and suppresses required blank, blank is taken out, and collection is spare, is further processed；
S5：After being heat-treated, it is that 8.8%~9.2% copper acetate is water-soluble that molding embryo material in step S4, which is immersed in mass fraction,
28~32min of liquid heat-insulation soaking is simultaneously passed through ultrasonic wave and is ultrasonically treated, and drip liquid takes out, the condition that merging temperature is 77~81 DEG C
440~460s of lower steam treatment is warming up to 104~108 DEG C of continuation steam treatments 500 with the heating rate of 3.3~3.7 DEG C/min
~520s takes out, obtains pretreatment clutch friction plate；
10~12min of microwave drying treatment of clutch friction plate will be pre-processed, 8~10min in coating solution is immersed in, takes
Go out, secondary microwave be dried 18~20min, take out, vacuum degree be 140~160MPa under conditions of be vacuum-treated 55~
60min。
S6：It is handled using grinding, you can obtain no asbestos anti-jitter clutch surface；
S7：Packaging and storage carry out quantitative sealed packaging using packing machine, and the humidity of storage environment is no more than 65%, environment temperature
No more than 70 degrees Celsius.
Specifically, the coating solution in the step S5, is made of the raw material of following parts by weight：Carboxymethyl cellulose 11~12
Part, 8~9 parts of magnesium stearate, 5.6~6.2 parts of boron oxide, 14~15 parts of polyacrylate, 17~18 parts of aluminum nitrate, calcium boride
9.3~9.7 parts, 120~140 parts of water.
Embodiment 3
A kind of no asbestos car clutch face sheet, raw material are as follows by weight：25 parts of albronze thread reinforcement, thickener 4
Part, 4 parts of tackifying resin, bonding agent 35,13 parts of copper powder, 15 parts of glass putty, 4 parts of iron oxide, 5 parts of calcium sulfate, 11 parts of magnesium sulfate, sulfuric acid
13 parts of zinc, 9 parts of aluminium oxide, 13 parts of graphite.
Specifically, the thickener is that methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl are fine
Tie up the mixture of element, and the mixing ratio of methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose
Weight is 1:3:2:2.
Specifically, the tackifying resin has excellent polymer compatibility, each component institute accounting wherein in tackifying resin
Example be：Dimethyl methyl acid resin 60%, phenolphthalein resin 25%, 201 resins 15%, each component proportion is in the old agent：It is anti-old
Agent CPPD50%, anti-aging agent RD 25%, antioxidant D 25%.
Specifically, it is 10~20% water soluble phenol resin and 6~15% powder by weight that the bonding agent, which is used,
What last nitrile rubber mixed.
A kind of production technology of no asbestos car clutch face sheet, includes the following steps：
S1：Albronze thread reinforcement, thickener, tackifying resin, bonding agent, copper powder, glass putty, iron oxide, calcium sulfate, sulfuric acid
Magnesium, zinc sulfate, aluminium oxide, graphite weigh spare in proportion；
S2：Copper powder, glass putty, iron oxide, calcium sulfate, magnesium sulfate, zinc sulfate, aluminium oxide, graphite in step S1 is added to and is ground
It in grinding barrel, is ground using grinding drum, material is mixed fully, milling time is between 0.5h-0.6h, grinding temperature control
Between 45-85 degrees Celsius, the rotating speed of grinder is 1000-1200 revs/min, and grinding collects mixed material after terminating standby
With raw material is sealed, and obtains mix preparation A；
S3：Thickener, tackifying resin, bonding agent in step S1 is added in grinding drum successively, is ground using grinding drum
Mill mixes material fully, and control mixing temperature controls incorporation time between 0.2h-0.3h between 42-52 degrees Celsius,
The rotating speed of stirring motor is controlled at 1100-1200 revs/min, obtains mix preparation B, mix preparation B is sticky slurry；
S4：Slurry is immersed in by treating tank in albronze thread reinforcement, is then dried and is weighed, and is reused wrapping machine and is twined
It is coiled into blank, is then placed in mold, in control environment temperature between 5-45 degrees Celsius, under 100-600MPa pressure, pressurize
15~25 minutes；
50~70MPa of repressurization, and cold moudling after pressurize 15~25 minutes；
Molding embryo material is demoulded, the embryo material of demoulding is placed in sintering furnace and is fired into according to selected basis material sintering process
Part takes out product and suppresses required blank, blank is taken out, and collection is spare, is further processed；
S5：After being heat-treated, it is that 8.8%~9.2% copper acetate is water-soluble that molding embryo material in step S4, which is immersed in mass fraction,
28~32min of liquid heat-insulation soaking is simultaneously passed through ultrasonic wave and is ultrasonically treated, and drip liquid takes out, the condition that merging temperature is 77~81 DEG C
440~460s of lower steam treatment is warming up to 104~108 DEG C of continuation steam treatments 500 with the heating rate of 3.3~3.7 DEG C/min
~520s takes out, obtains pretreatment clutch friction plate；
10~12min of microwave drying treatment of clutch friction plate will be pre-processed, 8~10min in coating solution is immersed in, takes
Go out, secondary microwave be dried 18~20min, take out, vacuum degree be 140~160MPa under conditions of be vacuum-treated 55~
60min。
S6：It is handled using grinding, you can obtain no asbestos anti-jitter clutch surface；
S7：Packaging and storage carry out quantitative sealed packaging using packing machine, and the humidity of storage environment is no more than 65%, environment temperature
No more than 70 degrees Celsius.
Specifically, the coating solution in the step S5, is made of the raw material of following parts by weight：Carboxymethyl cellulose 11~12
Part, 8~9 parts of magnesium stearate, 5.6~6.2 parts of boron oxide, 14~15 parts of polyacrylate, 17~18 parts of aluminum nitrate, calcium boride
9.3~9.7 parts, 120~140 parts of water.
A kind of no asbestos anti-jitter clutch surface provided by the invention and its production technology are enhanced with albronze line
Body, thickener, tackifying resin, bonding agent, copper powder, glass putty, iron oxide, calcium sulfate, magnesium sulfate, zinc sulfate, aluminium oxide, graphite are
Raw material changes traditional car clutch face sheet formula, and the larger metal powder of density is added in the stringent proportion for controlling each component：
Copper powder, glass putty, and hard particles are added, after being heat-treated, intensive treatment again, performance are carried out to the surface of clutch surface
Index is significantly better than the corresponding index of former car clutch face sheet, under the conditions of working long hours or limiting condition, reduce by
Clutch surface surface fracture caused by abnormal friction, skidding, ablation and plastic deformation generation, it is environmentally safe, make
It is simple for process, so that clutch surface piece performance is more stablized, skeleton frame core material and slurry combination effect are good, increase material distribution
Uniformity greatly improves clutch surface Wear Resistance energy, and clutch surface does not easily cause contraction, and the present invention has heat-resisting
Property may be up to 380 DEG C or more well, i.e., the characteristics of high temperature friction coefficient is stable, low wear rate, and the relevant production process pair of product
Human body has no stimulation.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of no asbestos car clutch face sheet, it is characterised in that：Its raw material is as follows by weight：Albronze thread reinforcement
15~25 parts, 2~4 parts of thickener, 3~4 parts of tackifying resin, bonding agent 15~35,7~13 parts of copper powder, 5~15 parts of glass putty, oxygen
Change 2~4 parts of iron, 3~5 parts of calcium sulfate, 7~11 parts of magnesium sulfate, 5~13 parts of zinc sulfate, 5~9 parts of aluminium oxide, 7~13 parts of graphite.
2. a kind of no asbestos car clutch face sheet according to claim 1, it is characterised in that：The thickener is methyl
The mixture of cellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose, and methylcellulose, carboxylic first
The blend gravity of base cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose is 1:3:2:2.
3. a kind of no asbestos car clutch face sheet according to claim 1, it is characterised in that：The tackifying resin has
Excellent polymer compatibility, wherein each component proportion is in tackifying resin：Dimethyl methyl acid resin 60%, phenolphthalein resin
25%, 201 resins 15%, each component proportion is in the old agent：Anti-aging agent CPPD50%, anti-aging agent RD 25%, anti-aging agent
D25%。
4. a kind of no asbestos car clutch face sheet according to claim 1, it is characterised in that：The bonding agent is with pressing
Parts by weight are that 10~20% water soluble phenol resin and 6~15% powder nitrile rubber mix.
5. the production technology without asbestos car clutch face sheet described in a kind of claim 1-4 any one, it is characterised in that：
Include the following steps：
S1：Albronze thread reinforcement, thickener, tackifying resin, bonding agent, copper powder, glass putty, iron oxide, calcium sulfate, sulfuric acid
Magnesium, zinc sulfate, aluminium oxide, graphite weigh spare in proportion；
S2：Copper powder, glass putty, iron oxide, calcium sulfate, magnesium sulfate, zinc sulfate, aluminium oxide, graphite in step S1 is added to and is ground
It in grinding barrel, is ground using grinding drum, material is mixed fully, milling time is between 0.5h-0.6h, grinding temperature control
Between 45-85 degrees Celsius, the rotating speed of grinder is 1000-1200 revs/min, and grinding collects mixed material after terminating standby
With raw material is sealed, and obtains mix preparation A；
S3：Thickener, tackifying resin, bonding agent in step S1 is added in grinding drum successively, is ground using grinding drum
Mill mixes material fully, and control mixing temperature controls incorporation time between 0.2h-0.3h between 42-52 degrees Celsius,
The rotating speed of stirring motor is controlled at 1100-1200 revs/min, obtains mix preparation B, mix preparation B is sticky slurry；
S4：Slurry is immersed in by treating tank in albronze thread reinforcement, is then dried and is weighed, and is reused wrapping machine and is twined
It is coiled into blank, is then placed in mold, in control environment temperature between 5-45 degrees Celsius, under 100-600MPa pressure, pressurize
15~25 minutes；
50~70MPa of repressurization, and cold moudling after pressurize 15~25 minutes；
Molding embryo material is demoulded, the embryo material of demoulding is placed in sintering furnace and is fired into according to selected basis material sintering process
Part takes out product and suppresses required blank, blank is taken out, and collection is spare, is further processed；
S5：After being heat-treated, it is that 8.8%~9.2% copper acetate is water-soluble that molding embryo material in step S4, which is immersed in mass fraction,
28~32min of liquid heat-insulation soaking is simultaneously passed through ultrasonic wave and is ultrasonically treated, and drip liquid takes out, the condition that merging temperature is 77~81 DEG C
440~460s of lower steam treatment is warming up to 104~108 DEG C of continuation steam treatments 500 with the heating rate of 3.3~3.7 DEG C/min
~520s takes out, obtains pretreatment clutch friction plate；
10~12min of microwave drying treatment of clutch friction plate will be pre-processed, 8~10min in coating solution is immersed in, takes
Go out, secondary microwave be dried 18~20min, take out, vacuum degree be 140~160MPa under conditions of be vacuum-treated 55~
60min,
S6：It is handled using grinding, you can obtain no asbestos anti-jitter clutch surface；
S7：Packaging and storage carry out quantitative sealed packaging using packing machine, and the humidity of storage environment is no more than 65%, environment temperature
No more than 70 degrees Celsius.
6. a kind of production technology of no asbestos car clutch face sheet according to claim 5, it is characterised in that：The step
Coating solution in rapid S5, is made of the raw material of following parts by weight：11~12 parts of carboxymethyl cellulose, 8~9 parts of magnesium stearate, oxygen
Change 5.6~6.2 parts of boron, 14~15 parts of polyacrylate, 17~18 parts of aluminum nitrate, 9.3~9.7 parts of calcium boride, water 120~140
Part.
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| CN201810442437.9A CN108626281A (en) | 2018-05-10 | 2018-05-10 | A kind of no asbestos anti-jitter clutch surface and its production technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810442437.9A CN108626281A (en) | 2018-05-10 | 2018-05-10 | A kind of no asbestos anti-jitter clutch surface and its production technology |
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| Publication Number | Publication Date |
|---|---|
| CN108626281A true CN108626281A (en) | 2018-10-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103119120A (en) * | 2010-11-19 | 2013-05-22 | 日立化成株式会社 | Non-asbestos friction material composition, and friction material and friction member using same |
| CN105114498A (en) * | 2015-08-06 | 2015-12-02 | 杭州科瑞特摩擦材料有限公司 | Poly-p-phenylene terephthamide composite fiber dry clutch facing and preparation method thereof |
| KR20180026030A (en) * | 2016-09-01 | 2018-03-12 | 현대자동차주식회사 | Metallic friction material for brake pad |
| US20180106321A1 (en) * | 2016-04-21 | 2018-04-19 | Hitachi Chemical Company, Ltd. | Friction material composition, and friction material and friction member using the same |
-
2018
- 2018-05-10 CN CN201810442437.9A patent/CN108626281A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103119120A (en) * | 2010-11-19 | 2013-05-22 | 日立化成株式会社 | Non-asbestos friction material composition, and friction material and friction member using same |
| CN105114498A (en) * | 2015-08-06 | 2015-12-02 | 杭州科瑞特摩擦材料有限公司 | Poly-p-phenylene terephthamide composite fiber dry clutch facing and preparation method thereof |
| US20180106321A1 (en) * | 2016-04-21 | 2018-04-19 | Hitachi Chemical Company, Ltd. | Friction material composition, and friction material and friction member using the same |
| KR20180026030A (en) * | 2016-09-01 | 2018-03-12 | 현대자동차주식회사 | Metallic friction material for brake pad |
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Application publication date: 20181009 |