CN105154008A - Copper-free friction material for driving/braking and product of copper-free friction material - Google Patents
Copper-free friction material for driving/braking and product of copper-free friction material Download PDFInfo
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- CN105154008A CN105154008A CN201510678613.5A CN201510678613A CN105154008A CN 105154008 A CN105154008 A CN 105154008A CN 201510678613 A CN201510678613 A CN 201510678613A CN 105154008 A CN105154008 A CN 105154008A
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Abstract
The invention provides a copper-free friction material for driving/braking. The copper-free friction material comprises a bonded material, an organic fiber, a non-copper inorganic fiber, a damping material, an antifriction material, a friction material, a filling material, an alkalinity/acidity regulating material and a non-copper metal material. The friction material does not contain a copper component and also has favorable wear resistance and friction coefficient stability; and meanwhile, the invention provides a brake pad made of the friction material.
Description
Technical field
The present invention relates to a kind of friction materials without copper component transmission braking and goods thereof, particularly relate to a kind of friction materials without asbestos organism (NAO) transmission braking without copper component and goods thereof.
Background technology
Friction materials is that one is applied on power machine, relies on rubbing effect to perform the component materials of braking and transmission agency.It mainly comprises brake facing (brake facing) and clutch surface (clutch disc).Brake facing is used for braking, and clutch disc is used for transmission.
Because current user vehicle is to noise, the requirement that shake etc. relates to car comfort aspect improves increasingly, Japan takes the lead in developing without asbestos organic friction material, i.e. NAO, this material remains the copper content in low metal, thoroughly abandon the interpolation of iron material, by adding the material such as salt of wormwood and aramid fiber, stablize frictional coefficient, also abandon adding abrasive simultaneously, brake noise is reduced to very excellent level, also just so, frictional coefficient and heat fading performance also correspondingly reduce a rank, therefore, sacrifice under performance to the product that comfortableness is compromised without asbestos organic materials NAO.
In addition, copper in brake facing as friction materials, the effective brake of vehicle can be realized, but, after each brake, a small amount of copper-bearing materials all can be had to be deposited on road, finally to flow into water channel, constitute a threat to river and marine organisms, the country such as the U.S. has taken the lead in starting to consider to forbid the use of copper in friction materials.Therefore exploitation becomes a kind of new demand of friction materials industry without the friction materials of copper component.
Summary of the invention
In order to solve the problems of the technologies described above, the friction materials that object of the present invention provides a kind of and has stable friction factor, the wear resisting property transmission without copper component that is good, lower noise is braked.
Without a friction materials for copper component transmission braking, comprise following material:
Rub material, packing material, acid-basicity of the inorganic fibre of bond material, organic fibre, non-copper, damping material, antifriction material, increasing regulates the metallic substance of material and non-copper.
Preferably, this friction materials is made up of following material mixture ratio:
Bond material accounts for the 6-20% of this friction materials total mass;
Organic fibre accounts for the 2-8% of this friction materials total mass;
The inorganic fibre of non-copper accounts for the 2-8% of this friction materials total mass;
Damping material accounts for the 3-6% of this friction materials total mass;
Antifriction material accounts for the 3-11% of this friction materials total mass;
Increase the 0-11% that the material that rubs accounts for this friction materials total mass;
Packing material accounts for the 43-60% of this friction materials total mass;
Acid-basicity regulates material to account for the 5-10% of this friction materials total mass;
The metallic substance of non-copper accounts for the 0.5-5.5% of this friction materials total mass.
Preferably, this friction materials also comprises quieter material.
Preferably, described quieter material quality is not more than 2% of friction materials total mass.
Preferably, described bond material comprises one or more combinations in resol, melamine resin, epoxy resin, melmac, modified phenolic resins, lacquer tree resin, natural rubber and styrene-butadiene rubber(SBR) etc.
Preferably, described organic fibre comprises one or more combinations in aromatic polyamide (aramid fiber) fiber, cellulose fiber peacekeeping polyacrylic fibre; The inorganic fibre of described non-copper comprises one or more combinations in potassium titanate fiber, glass fibre, carbon fiber, ceramic fiber and aluminium series fiber.
Preferably, described antifriction material comprise in graphite, metallic sulfide, molybdenumdisulphide etc. one or several combination, described increasing rub material comprise in zirconium white, aluminum oxide, ferric oxide, zirconium silicate etc. one or several combination.
Preferably, described packing material comprises organic filler material and inorganic filling material by packing material, described organic filler material comprises one or more combinations in paracril (NBR), styrene-butadiene rubber(SBR) (SBR) and divinyl rubber (BR), rubber dust, particulate organic matter and tetrafluoroethylene (PTFE), and described inorganic filling material comprises one or more combinations in vermiculite, mica, calcium hydroxide, barium sulfate, calcium carbonate.
Preferably, described damping material comprises organic Frication powder, and described acid-basicity regulates material to comprise calcium hydroxide.
Accordingly, provide a kind of brake facing, comprise base material, tack coat and friction layer, described friction layer is made up of aforementioned arbitrary described friction materials without copper component transmission braking.
Friction materials without copper component transmission braking of the present invention, has following beneficial effect:
1, friction materials provided by the invention is containing the composition of copper, decreases the impact of copper on environment, also maintains good wear resisting property, stable frictional coefficient and good brake noise simultaneously.
2, brake facing provided by the invention, has without having good wear resisting property, stable frictional coefficient and good brake noise while copper component.
Embodiment
Below with reference to embodiment, the present invention is explained in detail.But the present invention should not be construed as limited to the following examples.
Bond material comprises one or more combinations in resol, melamine resin, epoxy resin, melmac, modified phenolic resins, lacquer tree resin natural rubber and styrene-butadiene rubber(SBR) etc.
Organic fibre comprises one or more combinations in aromatic polyamide (aramid fiber) fiber, cellulose fiber peacekeeping polyacrylic fibre.
The inorganic fibre of non-copper comprises one or more combinations in potassium titanate fiber, glass fibre, carbon fiber, ceramic fiber and aluminium series fiber.
Fiber base material can staple fibre or powder type use.
Packing material comprises organic filler material and inorganic filling material, and organic filler material comprises one or more combinations in the various rubber of paracril (NBR), styrene-butadiene rubber(SBR) (SBR) and divinyl rubber (BR), rubber dust, particulate organic matter such as cashew nut dust and tetrafluoroethylene (PTFE) etc.; Inorganic filling material comprises one or more combinations in vermiculite, mica, calcium hydroxide, barium sulfate, calcium carbonate etc.
Antifriction material comprises one or several combinations in graphite, metallic sulfide, molybdenumdisulphide etc.
Increase rub material comprise in zirconium white, aluminum oxide, ferric oxide, zirconium silicate etc. one or several combination.
Damping material comprises organic Frication powder.
The metallic substance of non-copper comprises one or several combinations in the metal-powder of aluminium, tin, iron and zinc etc.
Acid-basicity regulates material to comprise calcium hydroxide.
By each formula (mass percent) shown in table 1, table 2, utilize stirrer to be used for each component mixing 15min of friction materials, obtain the friction material mixture mixed.Subsequently friction material mixture is pressurizeed 6 seconds at the temperature of 150 DEG C and under the pressure of 14Mpa; then 3 seconds are vented; circulate 5 times; obtain the product of compression moulding; then by the thermal treatment 3 hours at the temperature of 180 DEG C of the product of compression moulding; finally by the product sprayed protection paint after thermal treatment, at the temperature of 150 DEG C, solidify 30min.
[table 1]
| Material name | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 | Example 10 |
| Bond material | 5 | 6 | 7 | 8 | 9 | 10 | 13 | 15 | 17 | 20 |
| Organic fibre | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 5 | 2 | 4 |
| Inorganic fibre | 8 | 7 | 6 | 5 | 8 | 3 | 2 | 4 | 5 | 3 |
| Damping material | 3 | 4 | 3 | 3 | 3 | 3 | 6 | 2 | 4 | 3 |
| Antifriction material | 11 | 8 | 4 | 11 | 6 | 5 | 7 | 9 | 5 | 3 |
| Increase the material that rubs | 0 | 3 | 5 | 4 | 7 | 5 | 9 | 0 | 0 | 11 |
| Packing material | 56.5 | 60 | 59 | 56.5 | 45.5 | 54 | 45 | 52 | 53.5 | 43 |
| Acid-basicity regulates material | 10 | 8 | 10 | 7 | 10 | 10 | 5 | 10 | 10 | 10 |
| The metallic substance of non-copper | 4.5 | 1 | 2 | 0.5 | 5.5 | 3 | 5 | 3 | 3.5 | 3 |
| Add up to | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Pressurized, heated is shaping | Not all right | Passable | Passable | Passable | Passable | Passable | Passable | Passable | Passable | Passable |
| Brake facing wear resistance | - | Good | Good | Good | Good | Good | Good | Good | Good | Good |
| Frictional coefficient | - | 0.41 | 0.44 | 0.38 | 0.36 | 0.4 | 0.43 | 0.25 | 0.26 | 0.46 |
| Stable friction factor | - | Good | Good | Good | Good | Good | Good | Good | Good | Good |
[table 2]
| Material name | Example 11 | Example 12 | Example 13 | Example 14 | Example 15 | Example 16 | Example 17 | Example 18 | Example 19 | Example 20 |
| Bond material | 5 | 6 | 7 | 8 | 9 | 10 | 13 | 15 | 17 | 20 |
| Organic fibre | 2.4 | 2.3 | 2.4 | 2.3 | 2.6 | 2.4 | 2.8 | 2.4 | 3 | 2.4 |
| Inorganic fibre | 2.4 | 2.3 | 2.4 | 2.3 | 2.6 | 2.4 | 2.8 | 2.4 | 3 | 2.4 |
| Damping material | 3 | 3 | 3 | 3 | 3 | 3 | 3.2 | 3.2 | 4.5 | 3 |
| Antifriction material | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| Increase the material that rubs | 11.2 | 11 | 9.2 | 9 | 6.8 | 6.2 | 1.2 | 0 | 0.8 | 0 |
| Packing material | 53 | 53 | 53 | 53 | 53 | 53 | 54 | 54 | 48.7 | 49.2 |
| Acid-basicity regulates material | 10 | 9.4 | 10 | 9.4 | 10 | 10 | 10 | 10 | 10 | 10 |
| The metallic substance of non-copper | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Add up to | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Pressurized, heated is shaping | Not all right | Passable | Passable | Passable | Passable | Passable | Passable | Passable | Passable | Passable |
| Brake facing wear resistance | - | Good | Good | Good | Good | Good | Good | Good | Good | Good |
| Frictional coefficient | - | 0.45 | 0.43 | 0.42 | 0.38 | 0.35 | 0.28 | 0.26 | 0.27 | 0.26 |
| Stable friction factor | - | Good | Good | Good | Good | Good | Good | Good | Good | Good |
As can be seen from table 1, table 2, this friction materials is not containing copper component, the wear resisting property had and the friction materials of stable friction factor simultaneously.
By each formula (mass percent) shown in table 3, table 4; stirrer is utilized to be used for each component mixing 15min of friction materials; obtain the friction material mixture mixed; subsequently friction material mixture is pressurizeed 6 seconds at the temperature of 150 DEG C and under the pressure of 14Mpa; then 3 seconds are vented; circulate 5 times; obtain the product of compression moulding; then by the thermal treatment 3 hours at the temperature of 180 DEG C of the product of compression moulding; finally by the product sprayed protection paint after thermal treatment, at the temperature of 150 DEG C, solidify 30min.
[table 3]
| Material name | Example 21 | Example 22 | Example 23 | Example 24 | Example 25 | Example 26 | Example 27 | Example 28 | Example 29 | Example 30 |
| Bond material | 6 | 7 | 8 | 9 | 10 | 13 | 15 | 17 | 19 | 20 |
| Organic fibre | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 5 | 2 | 4 |
| Inorganic fibre | 6 | 7 | 6 | 5 | 8 | 3 | 2 | 4 | 5 | 3 |
| Damping material | 3 | 4 | 3 | 3 | 3 | 3 | 6 | 2 | 4 | 3 |
| Antifriction material | 11 | 8 | 4 | 11 | 6 | 5 | 7 | 9 | 5 | 3 |
| Increase the material that rubs | 0 | 3 | 5 | 4 | 7 | 5 | 9 | 0 | 0 | 11 |
| Quieter material | 2 | 1.8 | 1.4 | 1.1 | 0.9 | 0.6 | 0.3 | 0 | 0.8 | 0.6 |
| Packing material | 55.5 | 57.2 | 56.6 | 54.4 | 43.6 | 50.4 | 43 | 50 | 50.7 | 42.4 |
| Acid-basicity regulates material | 10 | 8 | 10 | 7 | 10 | 10 | 5 | 10 | 10 | 10 |
| The metallic substance of non-copper | 4.5 | 1 | 2 | 0.5 | 5.5 | 3 | 4.7 | 3 | 3.5 | 3 |
| Add up to | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Brake facing wear resistance | Well | Well | Well | Well | Well | Good | Good | Good | Well | Well |
| Frictional coefficient | 0.26 | 0.31 | 0.33 | 0.32 | 0.41 | 0.41 | 0.45 | 0.30 | 0.25 | 0.43 |
| Stable friction factor | Well | Well | Well | Well | Well | Good | Good | Good | Well | Well |
| Brake noise | Well | Well | Well | Well | Good | Good | Good | Good | Well | Well |
[table 4]
| Material name | Example 31 | Example 32 | Example 33 | Example 34 | Example 35 | Example 36 | Example 37 | Example 38 | Example 39 | Example 40 |
| Bond material | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 |
| Organic fibre | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 |
| Inorganic fibre | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 |
| Damping material | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 |
| Antifriction material | 10.3 | 9.3 | 8.3 | 7.3 | 6.3 | 5.3 | 4.3 | 3.3 | 10.6 | 9.6 |
| Increase the material that rubs | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Quieter material | 2 | 1.8 | 1.6 | 1.4 | 1.2 | 1 | 0.8 | 0.6 | 0.4 | 0.2 |
| Packing material | 51 | 51.2 | 51.4 | 51.6 | 51.8 | 52 | 52.2 | 52.4 | 44.3 | 44.5 |
| Acid-basicity regulates material | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| The metallic substance of non-copper | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 |
| Add up to | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Brake facing wear resistance | Well | Well | Well | Well | Well | Good | Good | Good | Well | Well |
| Frictional coefficient | 0.26 | 0.31 | 0.33 | 0.36 | 0.41 | 0.48 | 0.53 | 0.58 | 0.25 | 0.29 |
| Stable friction factor | Well | Well | Well | Well | Well | Good | Good | Good | Well | Well |
| Brake noise | Well | Well | Well | Well | Good | Good | Good | Good | Well | Well |
As can be seen from table 3, table 4, this friction materials does not contain copper component, the friction materials of the wear resisting property simultaneously had, good stable friction factor and little brake noise.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (10)
1., without a friction materials for copper component transmission braking, it is characterized in that, comprise following material:
Rub material, packing material, acid-basicity of the inorganic fibre of bond material, organic fibre, non-copper, damping material, antifriction material, increasing regulates the metallic substance of material and non-copper.
2. a kind of friction materials without copper component transmission braking according to claim 1, it is characterized in that, this friction materials is made up of following material mixture ratio:
Bond material accounts for the 6-20% of this friction materials total mass;
Organic fibre accounts for the 2-8% of this friction materials total mass;
The inorganic fibre of non-copper accounts for the 2-8% of this friction materials total mass;
Damping material accounts for the 3-6% of this friction materials total mass;
Antifriction material accounts for the 3-11% of this friction materials total mass;
Increase the 0-11% that the material that rubs accounts for this friction materials total mass;
Packing material accounts for the 43-60% of this friction materials total mass;
Acid-basicity regulates material to account for the 5-10% of this friction materials total mass;
The metallic substance of non-copper accounts for the 0.5-5.5% of this friction materials total mass.
3. a kind of friction materials without copper component transmission braking according to claim 1, it is characterized in that, this friction materials also comprises quieter material.
4. a kind of friction materials without copper component transmission braking according to claim 3, it is characterized in that, the quality of described quieter material is not more than 2% of friction materials total mass.
5. a kind of friction materials without copper component transmission braking according to claim 1, it is characterized in that, described bond material comprises one or more combinations in resol, melamine resin, epoxy resin, melmac, modified phenolic resins, lacquer tree resin, natural rubber and styrene-butadiene rubber(SBR) etc.
6. a kind of friction materials without copper component transmission braking according to claim 1, is characterized in that, described organic fibre comprises one or more combinations in aramid fiber, cellulose fiber peacekeeping polyacrylic fibre; The inorganic fibre of described non-copper comprises one or more combinations in potassium titanate fiber, glass fibre, carbon fiber, ceramic fiber and aluminium series fiber.
7. a kind of friction materials without copper component transmission braking according to claim 1, it is characterized in that, described antifriction material comprise in graphite, metallic sulfide, molybdenumdisulphide etc. one or several combination, described increasing rub material comprise in zirconium white, aluminum oxide, ferric oxide, zirconium silicate one or several combination.
8. a kind of friction materials without copper component transmission braking according to claim 1, it is characterized in that, described packing material comprises organic filler material and inorganic filling material by packing material, described organic filler material comprises one or more combinations in paracril (NBR), styrene-butadiene rubber(SBR) (SBR) and divinyl rubber (BR), rubber dust, particulate organic matter and tetrafluoroethylene (PTFE), and described inorganic filling material comprises one or more combinations in vermiculite, mica, calcium hydroxide, barium sulfate, calcium carbonate.
9. a kind of friction materials without copper component transmission braking according to claim 1, it is characterized in that, described damping material comprises organic Frication powder, and described acid-basicity regulates material to comprise calcium hydroxide.
10. a brake facing, comprises base material, tack coat and friction layer, it is characterized in that, described friction layer is made up of the arbitrary described friction materials without copper component transmission braking of claim 1-9.
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| CN105524593A (en) * | 2015-12-29 | 2016-04-27 | 重庆迪斯步特摩擦材料有限公司江津分公司 | A manufacturing method of a friction plate |
| CN106051003A (en) * | 2016-06-20 | 2016-10-26 | 太原理工大学 | Mine carbon fiber enhanced boron modified phenolic resin base friction plate material |
| CN106118597A (en) * | 2016-06-29 | 2016-11-16 | 晋江凯燕新材料科技有限公司 | The friction material of transmission braking and goods |
| CN106438789A (en) * | 2016-10-21 | 2017-02-22 | 马乐群 | Ceramic brake pad |
| CN106763355A (en) * | 2016-11-10 | 2017-05-31 | 厦门市双晋材料科技有限公司 | A kind of friction material and the brake block with the friction material |
| CN107502010A (en) * | 2017-09-30 | 2017-12-22 | 浙江瀚镪自动化设备股份有限公司 | A kind of manipulator face coat |
| CN109058336A (en) * | 2018-09-27 | 2018-12-21 | 烟台孚瑞克森汽车部件有限公司 | A kind of no copper stibium-free environment-friendly ceramic frication material and preparation method thereof |
| CN109628065A (en) * | 2019-01-04 | 2019-04-16 | 上海华信摩擦材料有限公司 | A kind of brake block friction material and preparation method thereof |
| CN110273953A (en) * | 2019-07-03 | 2019-09-24 | 晋江凯燕新材料科技有限公司 | Without copper without asbestos organic friction material and product |
| CN110273952A (en) * | 2019-07-03 | 2019-09-24 | 晋江凯燕新材料科技有限公司 | Few copper is without asbestos organic friction material and product |
| CN110792708A (en) * | 2019-11-06 | 2020-02-14 | 晋江凯燕新材料科技有限公司 | Environment-friendly friction material and product thereof |
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| CN114278691A (en) * | 2019-07-03 | 2022-04-05 | 福建省晋江凯燕新材料研究院有限公司 | Method for preparing organic friction material by using spiral micro carbon fiber |
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| CN105524593A (en) * | 2015-12-29 | 2016-04-27 | 重庆迪斯步特摩擦材料有限公司江津分公司 | A manufacturing method of a friction plate |
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| CN106051003A (en) * | 2016-06-20 | 2016-10-26 | 太原理工大学 | Mine carbon fiber enhanced boron modified phenolic resin base friction plate material |
| CN106051003B (en) * | 2016-06-20 | 2019-04-12 | 太原理工大学 | Mining carbon fiber-reinforced boron modified phenolic resin based friction plate material |
| CN106118597A (en) * | 2016-06-29 | 2016-11-16 | 晋江凯燕新材料科技有限公司 | The friction material of transmission braking and goods |
| CN106438789A (en) * | 2016-10-21 | 2017-02-22 | 马乐群 | Ceramic brake pad |
| CN106763355A (en) * | 2016-11-10 | 2017-05-31 | 厦门市双晋材料科技有限公司 | A kind of friction material and the brake block with the friction material |
| CN107502010A (en) * | 2017-09-30 | 2017-12-22 | 浙江瀚镪自动化设备股份有限公司 | A kind of manipulator face coat |
| CN109058336A (en) * | 2018-09-27 | 2018-12-21 | 烟台孚瑞克森汽车部件有限公司 | A kind of no copper stibium-free environment-friendly ceramic frication material and preparation method thereof |
| CN109628065A (en) * | 2019-01-04 | 2019-04-16 | 上海华信摩擦材料有限公司 | A kind of brake block friction material and preparation method thereof |
| CN110273953A (en) * | 2019-07-03 | 2019-09-24 | 晋江凯燕新材料科技有限公司 | Without copper without asbestos organic friction material and product |
| CN110273952A (en) * | 2019-07-03 | 2019-09-24 | 晋江凯燕新材料科技有限公司 | Few copper is without asbestos organic friction material and product |
| CN112343947A (en) * | 2019-07-03 | 2021-02-09 | 晋江凯燕新材料科技有限公司 | Copper-free asbestos-free organic friction material with reinforcing material and product |
| CN114278691A (en) * | 2019-07-03 | 2022-04-05 | 福建省晋江凯燕新材料研究院有限公司 | Method for preparing organic friction material by using spiral micro carbon fiber |
| CN112343947B (en) * | 2019-07-03 | 2022-07-19 | 晋江市凯燕新材料研究院股份有限公司 | Copper-free asbestos-free organic friction material with reinforcing material and product |
| CN114278691B (en) * | 2019-07-03 | 2023-11-24 | 福建省晋江凯燕新材料研究院有限公司 | Method for preparing organic friction material by using spiral micro carbon fiber |
| WO2021010003A1 (en) * | 2019-07-18 | 2021-01-21 | 日清紡ブレーキ株式会社 | Friction material composition, friction material, and disk brake pad |
| CN114144494A (en) * | 2019-07-18 | 2022-03-04 | 日清纺制动器株式会社 | Friction material composition, friction material, and disc brake pad |
| JP7467465B2 (en) | 2019-07-18 | 2024-04-15 | 日清紡ブレーキ株式会社 | Friction material composition, friction material and disc brake pad |
| CN110792708A (en) * | 2019-11-06 | 2020-02-14 | 晋江凯燕新材料科技有限公司 | Environment-friendly friction material and product thereof |
| CN110792708B (en) * | 2019-11-06 | 2020-11-03 | 晋江凯燕新材料科技有限公司 | Environment-friendly friction material and product thereof |
| CN112228483A (en) * | 2019-11-06 | 2021-01-15 | 晋江凯燕新材料科技有限公司 | Modified organic filling material for friction material and preparation process thereof |
| CN112228483B (en) * | 2019-11-06 | 2022-05-17 | 晋江市凯燕新材料研究院股份有限公司 | Modified organic filling material for friction material and preparation process thereof |
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