CN104531070A - Softwood particle blending and modified rubber based friction material as well as preparation method and using method thereof - Google Patents
Softwood particle blending and modified rubber based friction material as well as preparation method and using method thereof Download PDFInfo
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- CN104531070A CN104531070A CN201410837982.XA CN201410837982A CN104531070A CN 104531070 A CN104531070 A CN 104531070A CN 201410837982 A CN201410837982 A CN 201410837982A CN 104531070 A CN104531070 A CN 104531070A
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Abstract
The invention relates to a softwood particle blending and modified rubber based friction material with high friction coefficient and low wear rate and a preparation process of the softwood particle blending and modified rubber based friction material. The softwood particle blending and modified rubber based friction material is prepared from the following components in percentage by weight: 20-35 wt% of silane coupling agent modified softwood particle, 10-35 wt% of rubber, 4-8 wt% of an organic resin adhesive, 6-10 wt% of inorganic and organic reinforced fibers, 9-25 wt% of a friction property regulator and a filler and 2-7 wt% of a rubber promoter. According to the softwood particle blending and modified rubber based friction material disclosed by the invention, with adoption of comprehensive proportion of the silane coupling agent modified softwood particles and other components, the dynamic friction coefficient of the softwood particle blending and modified rubber based friction material achieves 0.18-0.26, the static friction coefficient achieves 0.27-0.35, and the wear rate also keeps below 4*10<-8>cm<3>/J.
Description
Technical field
The invention belongs to Rubber base friction material and preparation method and using method, be specifically related to a kind of granulated cork blending and modifying Rubber base friction material and preparation method, can be used for clutch of motorcycle.
Background technology
Friction materials is that one is applied on power machine, and rely on frictional behaviour to be used for performing the component materials of braking and transmission agency, it mainly comprises brake facing and clutch surface.Friction materials is widely used in friction catch, the transmission mechanism such as stopper and clutch coupling of the vehicles such as motorcycle and machinery equipment.
According to National Standard of the People's Republic of China GB/T13826-2008, the kinetic friction coefficient of clutch of motorcycle Rubber base friction material should be greater than 0.15, and static friction coefficient should be not less than 0.24.Traditional Rubber base friction material is made up of fortifying fibre, rubber and resin glue and the large component of frictional property regulator three, kinetic friction coefficient 0.1 ~ 0.2, static friction coefficient is greater than 0.2, the transmission needs of humid clutch can be met, but there is Railway Project, as sent out punching in high, the easy skidding of friction materials wearing and tearing, clutch gear-shift process; Simultaneously because the platen of clutch of motorcycle and center parts are al alloy component, in transmission braking procedure, due to aluminium alloy, comparatively steel hardness is low, therefore this mating plate weares and teares comparatively serious in the course of the work, thus affects the work-ing life of clutch of motorcycle.
Publication number is that the Chinese patent of CN103205239A discloses a kind of Rubber base friction material and preparation method thereof, and its formula is the acrylic elastomer of 15% ~ 35% containing mass percent; The aramid pulp of 3% ~ 15%, or carbon fiber or mineral fibre or wherein more than one mixtures; The Multifunctional friction particle of 5% ~ 25%; The aluminum oxide of 5% ~ 20%, or ground barium sulfate, or iron black, or chromite powder, or crystalline flake graphite, or calcined petroleum coke or wherein more than one mixtures; 2% ~ 15% cashew nut shell oil Frication powder; 2% ~ 15% granulated cork; 2% ~ 15% cashew nut oil modified alkyd resin; The sulphur of 1% ~ 7%, or altax, or Vulcanization accelerator TMTD, or zinc oxide, or stearic acid or wherein more than one mixtures.Raw material is mixed by high speed mixer by this patent, then mixture is dropped into Banbury mixer at 95 DEG C ~ 105 DEG C, carry out banburying and carry out the mixing of refining glue in mill, then precast body is put into vulcanizing press hot-press solidifying, finally carry out heat treatment and obtain Rubber base friction material.The method is when dropping into Banbury mixer by compound, cause rubber components shift to an earlier date sulfuration and be cross-linked because temperature is too high, cause the consistency and elasticity modulus of goods higher, under brake pressure, do not have the stickiness of plateau cure goods good with the stickiness on antithesis surface, the real contact area of friction surface is less, the frictional coefficient of material is lower, in embodiment, kinetic friction coefficient is 0.17 ~ 0.18, static friction coefficient is 0.23 ~ 0.24, in friction process, be easy to torn material surface with the contact of mating material surface micro-bulge simultaneously, cause higher wear rate, in embodiment, the wear rate of material reaches 8 × 10
-8m
3/ J.
Publication number is that the Chinese patent of CN100572488C discloses a kind of friction materials and preparation method thereof, in its formula, the main ingredient weight percent of paper friction material is: carbon fiber or aramid fiber 20% ~ 50%, linter pulp 15% ~ 20%, graphite 5% ~ 10%, diatomite and silicon-dioxide 5% ~ 10%, friction regulator 4% ~ 20%, cashew nut oil modified alkyd resin 15% ~ 35%, tinting material 0% ~ 3%; The main ingredient weight percent of rubbery cork friction materials is: paracril, resin and cork 60% ~ 80%, friction regulator 2% ~ 10%, graphite 5 ~ 10%, silica 1 % ~ 5%, diatomite 2% ~ 5%, aluminum oxide 1% ~ 5%, Frication powder 2% ~ 5%, sepiolite 1% ~ 5%.Its technical scheme of this patent is that a kind of friction materials comprises liner, paper friction material, rubbery cork friction materials.This patent is by preparing paper friction material and rubbery cork type friction materials respectively, then the two is mixed, temperature be 200 ~ 300 DEG C, pressure 3 ~ 10MPa, time is no more than 1 minute and is compressed on liner under condition, the volume ratio of described paper friction material and rubbery cork friction materials is 1:1 ~ 5, and finally at 140 ~ 180 DEG C, solidification obtains this friction materials in 2 ~ 6 hours.The method needs to prepare paper friction material and rubbery cork type friction materials respectively, process cycle is long, process is complicated, simultaneously accurate to the volume ratio control overflow of bi-material, can not realize the beneficial effect of the invention when the volume ratio of paper friction material and rubbery cork friction materials is greater than 1:5.According to the standard-required of GB/T13826-2008, the kinetic friction coefficient of this kind of material need be greater than 0.15, static friction coefficient need be not less than 0.24, but the kinematics and static friction coefficient obtained measured by the section Example of this patent is lower, above-mentioned standard-required can not be met, the wear rate of friction materials is comparatively large simultaneously, is up to 6 × 10
-8cm
3/ J.
Summary of the invention
The technical problem solved
In order to avoid the deficiencies in the prior art part, the present invention proposes a kind of granulated cork blending and modifying Rubber base friction material and preparation method and using method, by increasing the mass percentage of rubber, optimize mutually with other components simultaneously, overcome the problem that existing Rubber base friction material frictional coefficient is lower and fret wear rate is larger.
Technical scheme
A kind of granulated cork blending and modifying Rubber base friction material, it is characterized in that component is: silane coupler modified granulated cork 20 ~ 35wt%, rubber 10 ~ 35wt%, organic binder resin 4 ~ 8wt%, inorganic and organic reinforced fiber 6 ~ 10wt%, frictional property regulator and filler 9 ~ 25wt%, rubber ingredients 2 ~ 7wt%; In composition, the weight percent sum of each component is 100%.
Described silane coupler modified granulated cork adopts the cork layer of Quercus variabilis bark part to obtain, and particle diameter is 60 orders, adopts silane coupling agent to carry out dipping modification.
Described rubber is particulate solid, adopts one or more mixtures in paracril, viton or styrene-butadiene rubber(SBR).
Described organic binder resin is one or more mixtures in cashew nut oil modified alkyd resin, boron modified phenolic resin or nitrile rubber modified phenolic resin.
Described rubber ingredients are that sublimed sulphur and vulcanizing agent DCP mix, the three kinds or more mixture added again in altax, accelerant CZ, zinc oxide, stearic acid or antioxidant MB.
Described inorganic and organic reinforced fiber is mixture a kind of in carbon fiber and aramid fiber, glass fibre, calcium sulfate crystal whiskers or phenolic fibre.
Described frictional property regulator is one or more mixtures in aluminum oxide, silicon-dioxide, zinc oxide, iron powder and crystalline flake graphite.
The black rubber powder of described filler, kaolin or barium sulfate.
Prepare a method for described any one granulated cork blending and modifying Rubber base friction material, it is characterized in that step is as follows:
Step 1: silane coupler modified granulated cork 20% ~ 35%, rubber 10% ~ 35%, organic binder resin 4% ~ 8%, inorganic and organic reinforced fiber 6% ~ 10%, frictional property regulator and filler 9% ~ 25%, rubber ingredients 2% ~ 7% are mixed, carrying out beginning to pratise between the roll shaft adding opening rubber mixing machine obtains tabular precast body; Described sweetening process parameter of opening is: temperature is normal temperature, 5 ~ 7 minutes time;
Step 2: tabular precast body is carried out hot-press solidifying on vulcanizing press, hot pressing parameters is: temperature 160 DEG C; Pressure 5 ~ 10MPa.
A kind of method adopting described friction materials to prepare clutch of motorcycle liner plate, it is characterized in that: carry out cutting according to the specification size of clutch of motorcycle liner plate bonding, putting into vulcanizing press carries out hot-forming, and hot pressing parameters is: temperature 160 DEG C; Pressure 5 ~ 7MPa; Carry out subsequent heat treatment, subsequent heat treatment: room temperature to 140 DEG C insulation 1 hour, then be warming up to 155 DEG C of insulations 1 hour, be naturally down to room temperature.
Beneficial effect
A kind of granulated cork blending and modifying Rubber base friction material that the present invention proposes and preparation method and using method, by adopting the aramid fiber of resistant to elevated temperatures paracril, viton, high strength and carbon fiber, silane coupler modified granulated cork, be used in combination with the frictional property regulator of multiple composite parts and filler simultaneously, obtain the friction materials with great friction coefficient and low wear rate.The granulated cork added is obtained by the cork layer of Quercus variabilis bark part, have that unique cell structure makes it have that quality is light, good springiness, softness, the good characteristic such as wear-resisting; Silane coupling agent can be combined with the organic materials such as resin, rubber and inorganic materials, it is a kind of low molecule organosilane, with it, modification is carried out to granulated cork, and add in friction materials, can make to form molecular bridge between organic and inorganic component by physics or chemical reaction, the two is combined, thus play and strengthen resin in friction materials, interfacial adhesion between fortifying fibre and filler, improve intensity and the toughness of matrix, reach and increase kinematics and static friction coefficient, reduce the effect of fret wear rate; Act in friction materials by " bridging " of silane coupling agent the structure defining " high polymer alloy ", improve bond energy, distributed equalization stress when material is subject to external force in friction process, stop material crack expansion, thus reach toughening effect.Calcium sulfate crystal whiskers is a kind of novel enhanced material, there is the dual special role of fortifying fibre and powder stuffing, it has the good characteristics such as heat-resisting, wear-resistant, corrosion-resistant, and its cost is lower than other kind whiskers, adds the polishing machine that whisker can improve friction materials.The thermotolerance of paracril is better than other rubber, and itself and resol have similar solubility parameter, and this technical scheme adopts Powdered rubber to simplify mixing procedure, reaches the effect shortening preparation technology's cycle; The production technique simultaneously adopting mill to be combined with vulcanizing press, simplifies production technique, improves the controllability to production process.When the mass percentage of paracril component is 10% ~ 35%, Rubber base friction material kinetic friction coefficient brings up to 0.23 ~ 0.26 by 0.17 ~ 0.19 of prior art, static friction coefficient brings up to 0.30 ~ 0.35 by 0.23 ~ 0.26 of prior art, the ratio D/S of kinetic friction coefficient and static friction coefficient can reach 0.66 ~ 0.86, and wear rate is by 7 × 10 of prior art
-8cm
3/ J is reduced to 3 × 10
-8cm
3/ J.
Accompanying drawing explanation
Fig. 1: be the surface scan electron microscopic picture of the granulated cork blending and modifying Rubber base friction material that embodiment 2 is prepared.
Fig. 2: be the surface scan electron microscopic picture of the granulated cork blending and modifying Rubber base friction material that embodiment 4 is prepared.
Embodiment
Now in conjunction with the embodiments, the invention will be further described for accompanying drawing:
Embodiment 1:
1) cashew nut oil modified alkyd resin 4g, paracril 20g, viton 2g, black rubber powder 16g, aramid fiber 5g, carbon fiber 1g, granulated cork 30g, vulcanizing agent DCP2g, sublimed sulphur 1g, altax 1g, accelerant CZ 1g, zinc oxide 3g, aluminum oxide 3g, barite 5g, silicon-dioxide 4g, iron powder 3g is taken respectively.Above raw material is put into points of 3 times mixing of small-sized mixer, each mixing time is no more than 10 seconds, and each mixed interval 3 minutes is to mixing;
2) carry out mixing between roll shaft compound being added from less to more opening rubber mixing machine, repeatedly mixing 5 minutes at normal temperatures, thin-pass obtained even tabular precast body for more than 20 times, opens refining and terminates;
3) by step 2) the precast body vernier caliper measurement thickness that obtains, on vulcanizing press 160 DEG C, carry out hot-press solidifying under 10MPa condition;
4) by step 3) to carry out cutting according to the specification size of clutch of motorcycle liner plate bonding for the rubber that obtains, and put into vulcanizing press and carry out hot-forming;
5) by step 4) thermal treatment one hour under 140 DEG C of conditions of the product that obtains, be warming up to 155 DEG C of thermal treatments one hour through half an hour, obtain granulated cork blending and modifying Rubber base friction material.
Adopt QM1000-II Type B wet friction performance aircraft, test according to GB/T13826-2008 standard, obtain kinetic friction coefficient 0.20 ~ 0.24, static friction coefficient 0.34 ~ 0.35, wear rate is less than 3 × 10
-8cm
3/ J.
Embodiment 2:
1) nitrile rubber modified phenolic resin 4g, paracril 25g, viton 3g, black rubber powder 12g, aramid fiber 5g, phenolic fibre 1g, granulated cork 28g, vulcanizing agent DCP2.5g, sublimed sulphur 1.5g, accelerant CZ 1g, stearic acid 1g, antioxidant MB 1g, aluminum oxide 2g, kaolin 5g, barium sulfate 4g, silicon-dioxide 4g is taken respectively.Above raw material is put into small-sized mixer mixing 3 times, each mixing time is no more than 10 seconds, and mixed interval 3 minutes is to mixing;
2) carry out mixing between roll shaft compound being added from less to more gradually opening rubber mixing machine, repeatedly mixing 6 minutes at normal temperatures, thin-pass obtained even tabular precast body for more than 20 times, opens refining and terminates;
3) by step 2) the precast body vernier caliper measurement thickness that obtains, on vulcanizing press 160 DEG C, carry out hot-press solidifying under 10MPa condition;
4) by step 3) to carry out cutting according to the specification size of clutch of motorcycle liner plate bonding for the rubber that obtains, put into vulcanizing press carries out hot-forming;
5) by step 4) thermal treatment one hour under 140 DEG C of conditions of the product that obtains, be warming up to 155 DEG C of thermal treatments one hour through half an hour, obtain granulated cork blending and modifying Rubber base friction material.
Adopt QM1000-II Type B wet friction performance aircraft, test according to GB/T13826-2008 standard, obtain kinetic friction coefficient 0.19 ~ 0.23, static friction coefficient 0.29 ~ 0.31, wear rate is less than 2 × 10
-8cm
3/ J.
Embodiment 3:
1) cashew nut oil modified alkyd resin 4g, paracril 30g, styrene-butadiene rubber(SBR) 3g, black rubber powder 9g, aramid fiber 5g, carbon fiber 1g, calcium sulfate crystal whiskers 2g, granulated cork 27g, vulcanizing agent DCP3g, sublimed sulphur 1g, stearic acid 1g, antioxidant MB 1g, accelerant CZ 1g, zinc oxide 2g, silicon-dioxide 3g, crystalline flake graphite 3g, barium sulfate 3g, aluminum oxide 1g is taken respectively.Above raw material is put into small-sized mixer mixing 3 times, each mixing time is no more than 10 seconds, and mixed interval 3 minutes is to mixing;
2) carry out mixing between roll shaft compound being added from less to more gradually opening rubber mixing machine, repeatedly mixing 5 minutes at normal temperatures, thin-pass obtained even tabular precast body for more than 20 times, opens refining and terminates;
3) by step 2) the precast body vernier caliper measurement thickness that obtains on vulcanizing press 160 DEG C, carry out hot-press solidifying under 10MPa condition;
4) by step 3) to carry out cutting according to the specification size of clutch of motorcycle liner plate bonding for the rubber that obtains, put into vulcanizing press carries out hot-forming;
5) by step 4) thermal treatment one hour under 140 DEG C of conditions of the product that obtains, be warming up to 155 DEG C of thermal treatments one hour through half an hour, obtain granulated cork blending and modifying Rubber base friction material.
Adopt QM1000-II Type B wet friction performance aircraft, test according to GB/T13826-2008 standard, obtain kinetic friction coefficient 0.20 ~ 0.25, static friction coefficient 0.35 ~ 0.36, wear rate is less than 3 × 10
-8cm
3/ J.
Embodiment 4:
1) boron modified phenolic resin 4g, paracril 35g, black rubber powder 9g, aramid fiber 5g, carbon fiber 1g, granulated cork 28.5g, vulcanizing agent DCP3.5g, accelerant CZ 1g, altax 1g, sublimed sulphur 1.5g, antioxidant MB 1g, stearic acid 0.5g, aluminum oxide 1g, kaolin 2g, barite 3g, silicon-dioxide 3g is taken respectively.Above raw material is put into small-sized mixer mixing 3 times, each mixing time is no more than 10 seconds, and mixed interval 3 minutes is to mixing;
2) carry out mixing between roll shaft compound being added from less to more gradually opening rubber mixing machine, repeatedly mixing 7 minutes at normal temperatures, thin-pass obtained even tabular precast body for more than 20 times, opens refining and terminates;
3) by step 2) the precast body vernier caliper measurement thickness that obtains, on vulcanizing press 160 DEG C, carry out hot-press solidifying under 10MPa condition;
4) by step 3) to carry out cutting according to the specification size of clutch of motorcycle liner plate bonding for the rubber that obtains, put into vulcanizing press carries out hot-forming;
5) by step 4) thermal treatment one hour under 140 DEG C of conditions of the product that obtains, be warming up to 155 DEG C of thermal treatments one hour through half an hour, obtain granulated cork blending and modifying Rubber base friction material.
Adopt QM1000-II Type B wet friction performance aircraft, test according to GB/T13826-2008 standard, obtain kinetic friction coefficient 0.18 ~ 0.26, static friction coefficient 0.29 ~ 0.33, wear rate is less than 3 × 10
-8cm
3/ J.
Claims (10)
1. a granulated cork blending and modifying Rubber base friction material, it is characterized in that component is: silane coupler modified granulated cork 20 ~ 35wt%, rubber 10 ~ 35wt%, organic binder resin 4 ~ 8wt%, inorganic and organic reinforced fiber 6 ~ 10wt%, frictional property regulator and filler 9 ~ 25wt%, rubber ingredients 2 ~ 7wt%; In composition, the weight percent sum of each component is 100%.
2. granulated cork blending and modifying Rubber base friction material according to claim 1, is characterized in that: described silane coupler modified granulated cork adopts the cork layer of Quercus variabilis bark part to obtain, and particle diameter is 60 orders, adopts silane coupling agent to carry out dipping modification.
3. granulated cork blending and modifying Rubber base friction material according to claim 1 or 3, is characterized in that: described rubber is particulate solid, adopts one or more mixtures in paracril, viton or styrene-butadiene rubber(SBR).
4. granulated cork blending and modifying Rubber base friction material according to claim 1, is characterized in that: described organic binder resin is one or more mixtures in cashew nut oil modified alkyd resin, boron modified phenolic resin or nitrile rubber modified phenolic resin.
5. granulated cork blending and modifying Rubber base friction material according to claim 1, is characterized in that: described rubber ingredients are that sublimed sulphur and vulcanizing agent DCP mix, the three kinds or more mixture added again in altax, accelerant CZ, zinc oxide, stearic acid or antioxidant MB.
6. granulated cork blending and modifying Rubber base friction material according to claim 1, is characterized in that: described inorganic and organic reinforced fiber is mixture a kind of in carbon fiber and aramid fiber, glass fibre, calcium sulfate crystal whiskers or phenolic fibre.
7. granulated cork blending and modifying Rubber base friction material according to claim 1, is characterized in that: described frictional property regulator is one or more mixtures in aluminum oxide, silicon-dioxide, zinc oxide, iron powder and crystalline flake graphite.
8. granulated cork blending and modifying Rubber base friction material according to claim 1, is characterized in that: the black rubber powder of described filler, kaolin or barium sulfate.
9. prepare a method for any one granulated cork blending and modifying Rubber base friction material described in claim 1 ~ 7, it is characterized in that step is as follows:
Step 1: silane coupler modified granulated cork 20% ~ 35%, rubber 10% ~ 35%, organic binder resin 4% ~ 8%, inorganic and organic reinforced fiber 6% ~ 10%, frictional property regulator and filler 9% ~ 25%, rubber ingredients 2% ~ 7% are mixed, carrying out beginning to pratise between the roll shaft adding opening rubber mixing machine obtains tabular precast body; Described sweetening process parameter of opening is: temperature is normal temperature, 5 ~ 7 minutes time;
Step 2: tabular precast body is carried out hot-press solidifying on vulcanizing press, hot pressing parameters is: temperature 160 DEG C; Pressure 5 ~ 10MPa.
10. the method adopting friction materials described in claim 9 to prepare clutch of motorcycle liner plate, it is characterized in that: carry out cutting according to the specification size of clutch of motorcycle liner plate bonding, putting into vulcanizing press carries out hot-forming, and hot pressing parameters is: temperature 160 DEG C; Pressure 5 ~ 7MPa; Carry out subsequent heat treatment, subsequent heat treatment: room temperature to 140 DEG C insulation 1 hour, then be warming up to 155 DEG C of insulations 1 hour, be naturally down to room temperature.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385146A (en) * | 2015-12-22 | 2016-03-09 | 合肥仲农生物科技有限公司 | Cork rubber compound |
| CN107675313A (en) * | 2017-10-20 | 2018-02-09 | 来安县隆华摩擦材料有限公司 | A kind of preparation method of clutch surface without the expanded complex yarn of asbestos fibre |
| CN107906148A (en) * | 2017-11-23 | 2018-04-13 | 铜陵市东方矿冶机械有限责任公司 | HIgh strength drying friction plate and preparation method thereof |
| CN108559252A (en) * | 2017-12-19 | 2018-09-21 | 翟琳 | A kind of preparation method of railroad track resilient sleeper-bearing |
| CN109235119A (en) * | 2018-09-27 | 2019-01-18 | 佛山九陌科技信息咨询有限公司 | A kind of preparation method of enhanced paper friction material |
| CN112458789A (en) * | 2020-11-27 | 2021-03-09 | 西北工业大学 | Rubber resin double-matrix wet-type friction material and preparation method thereof |
| CN115093720A (en) * | 2022-06-08 | 2022-09-23 | 杭州汉乐科新材料科技有限公司 | Motorcycle clutch friction plate containing walnut shell powder and preparation method thereof |
| CN115572455A (en) * | 2022-11-04 | 2023-01-06 | 贵州省材料产业技术研究院 | Phosphogypsum whisker/fiber reinforced composite material and preparation method thereof |
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| CN101429297A (en) * | 2008-12-17 | 2009-05-13 | 黄山奔马集团有限公司 | Friction plate material and its use method |
| CN103205239A (en) * | 2013-04-15 | 2013-07-17 | 杭州安凯机械有限公司 | Rubber base friction material and production method thereof |
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| CN101429297A (en) * | 2008-12-17 | 2009-05-13 | 黄山奔马集团有限公司 | Friction plate material and its use method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385146A (en) * | 2015-12-22 | 2016-03-09 | 合肥仲农生物科技有限公司 | Cork rubber compound |
| CN107675313A (en) * | 2017-10-20 | 2018-02-09 | 来安县隆华摩擦材料有限公司 | A kind of preparation method of clutch surface without the expanded complex yarn of asbestos fibre |
| CN107675313B (en) * | 2017-10-20 | 2019-05-10 | 来安县隆华摩擦材料有限公司 | A kind of preparation method of the no asbestos fibre extruding complex yarn of clutch surface |
| CN107906148A (en) * | 2017-11-23 | 2018-04-13 | 铜陵市东方矿冶机械有限责任公司 | HIgh strength drying friction plate and preparation method thereof |
| CN108559252A (en) * | 2017-12-19 | 2018-09-21 | 翟琳 | A kind of preparation method of railroad track resilient sleeper-bearing |
| CN109235119A (en) * | 2018-09-27 | 2019-01-18 | 佛山九陌科技信息咨询有限公司 | A kind of preparation method of enhanced paper friction material |
| CN112458789A (en) * | 2020-11-27 | 2021-03-09 | 西北工业大学 | Rubber resin double-matrix wet-type friction material and preparation method thereof |
| CN115093720A (en) * | 2022-06-08 | 2022-09-23 | 杭州汉乐科新材料科技有限公司 | Motorcycle clutch friction plate containing walnut shell powder and preparation method thereof |
| CN115093720B (en) * | 2022-06-08 | 2023-09-08 | 杭州汉乐科新材料科技有限公司 | Motorcycle clutch friction plate containing walnut shell powder and preparation method thereof |
| CN115572455A (en) * | 2022-11-04 | 2023-01-06 | 贵州省材料产业技术研究院 | Phosphogypsum whisker/fiber reinforced composite material and preparation method thereof |
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Application publication date: 20150422 |