CN104109342B - A kind of low noise, heat resistanceheat resistant decline resin-matrix friction material - Google Patents
A kind of low noise, heat resistanceheat resistant decline resin-matrix friction material Download PDFInfo
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- 239000002783 friction material Substances 0.000 title claims abstract description 28
- 230000007423 decrease Effects 0.000 title abstract 3
- 239000011159 matrix material Substances 0.000 title abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 27
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 15
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000571 coke Substances 0.000 claims abstract description 11
- 239000010439 graphite Substances 0.000 claims abstract description 10
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 10
- 239000010455 vermiculite Substances 0.000 claims abstract description 10
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 10
- 244000226021 Anacardium occidentale Species 0.000 claims abstract description 3
- 235000020226 cashew nut Nutrition 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 239000010466 nut oil Substances 0.000 claims abstract description 3
- 229920005989 resin Polymers 0.000 claims description 21
- 239000011347 resin Substances 0.000 claims description 21
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 18
- 238000005562 fading Methods 0.000 claims description 18
- 238000003825 pressing Methods 0.000 claims description 12
- 239000004760 aramid Substances 0.000 claims description 10
- 229920003235 aromatic polyamide Polymers 0.000 claims description 10
- 229940007424 antimony trisulfide Drugs 0.000 claims description 9
- NVWBARWTDVQPJD-UHFFFAOYSA-N antimony(3+);trisulfide Chemical compound [S-2].[S-2].[S-2].[Sb+3].[Sb+3] NVWBARWTDVQPJD-UHFFFAOYSA-N 0.000 claims description 9
- 235000019492 Cashew oil Nutrition 0.000 claims description 7
- 239000010467 cashew oil Substances 0.000 claims description 7
- 229940059459 cashew oil Drugs 0.000 claims description 7
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims description 7
- 239000005909 Kieselgur Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000002557 mineral fiber Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000004113 Sepiolite Substances 0.000 claims description 2
- 229910052599 brucite Inorganic materials 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000002006 petroleum coke Substances 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229910052624 sepiolite Inorganic materials 0.000 claims description 2
- 235000019355 sepiolite Nutrition 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- 241000545744 Hirudinea Species 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- 239000004033 plastic Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 1
- 239000003921 oil Substances 0.000 abstract 1
- 235000019198 oils Nutrition 0.000 abstract 1
- 230000035939 shock Effects 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- IHBMMJGTJFPEQY-UHFFFAOYSA-N sulfanylidene(sulfanylidenestibanylsulfanyl)stibane Chemical compound S=[Sb]S[Sb]=S IHBMMJGTJFPEQY-UHFFFAOYSA-N 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 8
- 239000003365 glass fiber Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 238000007872 degassing Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
Description
技术领域 technical field
本发明涉及到一种摩擦材料，特别涉及到一种低噪音、抗热衰退树脂基摩擦材料。背景技术汽车工业的飞速发展，一方面加强了汽车与人们生活的联系，给人们的日常生活带来了极大的方便，但是在享受汽车所带来的现代文明的同时，也无条件的承受着它带来的危害，特别是噪声的污染。随着噪声污染的日益严重和人们环保意识的不断增强，控制噪声污染就显得尤为紧要。另一方面，目前国内外大部分汽车用摩擦材料都是以酚醛树脂作为粘结剂，在连续刹车、高速紧急刹车时，摩擦材料的表面温度急剧升高，摩擦系数急剧下降，引起热衰退现象。严重时，会造成刹车失灵，酿成事故。因此如何让摩擦材料具有良好的抗热衰退和低噪音性能，已经成为目前树脂基摩擦材料研究的主要方向。 The invention relates to a friction material, in particular to a resin-based friction material with low noise and heat decay resistance. Background technology The rapid development of the automobile industry, on the one hand, strengthens the connection between automobiles and people's lives, and brings great convenience to people's daily life, but while enjoying the modern civilization brought by automobiles, it also unconditionally bears It brings harm, especially noise pollution. With the increasingly serious noise pollution and the continuous enhancement of people's awareness of environmental protection, it is particularly important to control noise pollution. On the other hand, at present, most of the friction materials for automobiles at home and abroad use phenolic resin as a binder. During continuous braking and high-speed emergency braking, the surface temperature of the friction material rises sharply, and the friction coefficient drops sharply, causing thermal recession. . In serious cases, it will cause brake failure and cause an accident. Therefore, how to make friction materials have good thermal decay resistance and low noise performance has become the main direction of research on resin-based friction materials.
发明内容 Contents of the invention
本发明的目的是提供一种制动噪音低，抗热衰退性能好，机械强度较高的树脂基摩擦材料。 The purpose of the present invention is to provide a resin-based friction material with low braking noise, good thermal fading resistance and high mechanical strength.
为了实现上述目的，本发明提供了一种低噪音、抗热衰退树脂基摩擦材料，由质量百分含量为纳米氧化铝改性酚醛树脂10～15%、芳纶浆粕3～6%、矿物纤维12～18%、石墨5～7%、三硫化二锑3～5%、焦炭5～7%、氧化铝0.5～1.5%、氧化铁3～5%、腰果油摩擦粉5～7%、膨胀蛭石3～9%、硅藻土2%～6%、丁腈橡胶3～9%、余量为硫酸钡。 In order to achieve the above purpose, the present invention provides a low-noise, heat-fading-resistant resin-based friction material, which consists of 10-15% by mass of nano-alumina modified phenolic resin, 3-6% of aramid pulp, mineral 12-18% fiber, 5-7% graphite, 3-5% antimony trisulfide, 5-7% coke, 0.5-1.5% alumina, 3-5% iron oxide, 5-7% cashew oil friction powder, Expanded vermiculite 3-9%, diatomaceous earth 2%-6%, nitrile rubber 3-9%, and the balance is barium sulfate.
进一步，所述纳米氧化铝的质量在纳米氧化铝改性酚醛树脂中占6%。 Further, the mass of the nano-alumina accounts for 6% of the nano-alumina modified phenolic resin.
进一步，所述焦炭粉为石油焦炭。 Further, the coke powder is petroleum coke.
进一步，所述氧化铝的粒度在325目以上。 Further, the particle size of the alumina is above 325 mesh.
进一步，所述矿物纤维为玻璃纤维、海泡石、硅灰石、水镁石、钛酸钾晶须或它们中任意两种混合物。 Further, the mineral fiber is glass fiber, sepiolite, wollastonite, brucite, potassium titanate whisker or a mixture of any two of them.
本发明还提供了一种低噪音、抗热衰退树脂基摩擦材料的制备方法，包括以下步骤： The present invention also provides a method for preparing a low-noise, heat-fading-resistant resin-based friction material, which includes the following steps:
将纳米氧化铝改性酚醛树脂10～15%、芳纶浆粕3～6%、矿物纤维12～18%、石墨5～7%、三硫化二锑3～5%、焦炭5～7%、氧化铝0.5～1.5%、氧化铁3～5%、腰果油摩擦粉5～7%、膨胀蛭石3～9%、硅藻土2%～6%、丁腈橡胶3～9%、硫酸钡按质量百分比称重，投入混料机中，进行充分搅拌，达到均匀混合后放入模具内； Nano-alumina modified phenolic resin 10-15%, aramid pulp 3-6%, mineral fiber 12-18%, graphite 5-7%, antimony trisulfide 3-5%, coke 5-7%, Aluminum oxide 0.5-1.5%, iron oxide 3-5%, cashew nut oil friction powder 5-7%, expanded vermiculite 3-9%, diatomite 2%-6%, nitrile rubber 3-9%, barium sulfate Weigh according to the mass percentage, put it into the mixer, fully stir, and put it into the mold after uniform mixing;
将压模预热到150～160℃，准备压制； Preheat the die to 150-160°C and prepare for pressing;
其中压制工艺条件为：压制温度160℃，压制压力30 Mpa，30 s后放气一次或两次，保温保压时间60 s/mm； The pressing process conditions are: pressing temperature 160°C, pressing pressure 30 Mpa, degassing once or twice after 30 s, heat preservation and pressure holding time 60 s/mm;
将压制好的制品试样放到烘箱中，温度升至130℃，保温1 h；升温到165℃，保温1 h；升温到180℃，保温5 h；冷却至室温。 Put the pressed product sample in an oven, raise the temperature to 130°C, and keep it for 1 hour; raise the temperature to 165°C, keep it for 1 hour; raise the temperature to 180°C, keep it for 5 hours; cool to room temperature.
本发明的优点在于结合纳米氧化铝改性酚醛树脂可以稳定摩擦系数，焦炭、膨胀蛭石、硅藻土、丁腈橡胶可以降低噪音，芳纶浆粕和矿物纤维是增强材料，其它材料可起到降低磨损率、调节抗热衰退性能等的独特性质，制备了一种合适且平稳、抗热衰退性能好、耐磨率低、制动噪声小、对塑性变形的抵抗能力和抗冲击性能较强等的材料，符合使用要求。 The advantage of the present invention is that the combination of nano-alumina modified phenolic resin can stabilize the friction coefficient, coke, expanded vermiculite, diatomaceous earth, and nitrile rubber can reduce noise, aramid pulp and mineral fiber are reinforcing materials, and other materials can play a role. To reduce the wear rate, adjust the unique properties of heat decay resistance, etc., a suitable and smooth, good heat decay resistance, low wear resistance, low braking noise, resistance to plastic deformation and impact resistance are prepared. Strong and other materials, in line with the requirements of use.
附图说明 Description of drawings
图1为不同试样摩擦系数随温度变化曲线； Figure 1 is the curve of friction coefficient of different samples with temperature;
图2为不同试样磨损率随温度变化曲线； Figure 2 is the curve of the wear rate of different samples as a function of temperature;
图3为不同试样噪声随温度变化图。 Figure 3 is a graph showing the variation of noise with temperature for different samples.
具体实施方式 detailed description
下面通过具体实施例详细描述一下本发明的具体内容。 The specific content of the present invention will be described in detail below through specific embodiments.
实施例1 Example 1
一种低噪音、抗热衰退树脂基摩擦材料，按质量百分比包括如下组分：纳米氧化铝改性酚醛树脂10%，芳纶浆粕3%，玻璃纤维8%，钛酸钾晶须10%，石墨6%，三硫化二锑4%，焦炭6%，氧化铝1%，氧化铁4%，腰果油摩擦粉6%，膨胀蛭石3%,硅藻土2%，丁腈橡胶3%，余量为硫酸钡；所述材料的制备方法为：将上述混合组分投入混料机中，进行充分搅拌，达到均匀混合后放入模具内；将压模预热到150～160℃，准备压制；压制工艺条件为：压制温度160℃，压制压力30 Mpa，30 s后放气一次或两次，保温保压时间60 s/mm；将压制好的制品试样放到烘箱中，温度升至130℃，保温1 h；升温到165℃，保温1 h；升温到180℃，保温5 h；冷却至室温。（配方1） A low-noise, heat-fading resistant resin-based friction material, including the following components by mass percentage: 10% nano-alumina modified phenolic resin, 3% aramid pulp, 8% glass fiber, and 10% potassium titanate whisker , graphite 6%, antimony trisulfide 4%, coke 6%, alumina 1%, iron oxide 4%, cashew oil friction powder 6%, expanded vermiculite 3%, diatomite 2%, nitrile rubber 3% , and the balance is barium sulfate; the preparation method of the material is as follows: put the above-mentioned mixed components into the mixer, fully stir, and put them into the mold after uniform mixing; preheat the die to 150-160°C, Prepare for pressing; the pressing process conditions are: pressing temperature 160°C, pressing pressure 30 Mpa, degassing once or twice after 30 s, heat preservation and pressure holding time 60 s/mm; put the pressed product sample in an oven, the temperature Raise the temperature to 130°C and keep it for 1 hour; raise the temperature to 165°C and keep it for 1 hour; raise the temperature to 180°C and keep it for 5 hours; cool to room temperature. (Recipe 1)
实施例2 Example 2
一种低噪音、抗热衰退树脂基摩擦材料，按质量百分比包括如下组分：纳米氧化铝改性酚醛树脂10%，芳纶浆粕3%，玻璃纤维8%，钛酸钾晶须10%，石墨6%，三硫化二锑4%，焦炭6%，氧化铝1%，氧化铁4%，腰果油摩擦粉6%，膨胀蛭石6%，硅藻土6%，丁腈橡胶3%，余量为硫酸钡；所述材料的制备方法如实施例1所述。（配方2） A low-noise, heat-fading resistant resin-based friction material, including the following components by mass percentage: 10% nano-alumina modified phenolic resin, 3% aramid pulp, 8% glass fiber, and 10% potassium titanate whisker , graphite 6%, antimony trisulfide 4%, coke 6%, alumina 1%, iron oxide 4%, cashew oil friction powder 6%, expanded vermiculite 6%, diatomaceous earth 6%, nitrile rubber 3% , the balance being barium sulfate; the preparation method of the material is as described in Example 1. (Recipe 2)
实施例3 Example 3
一种低噪音、抗热衰退树脂基摩擦材料，按质量百分比包括如下组分：纳米氧化铝改性酚醛树脂10%，芳纶浆粕3%，玻璃纤维8%，钛酸钾晶须10%，石墨6%，三硫化二锑4%，焦炭6%，氧化铝1%，氧化铁4%，腰果油摩擦粉6%，膨胀蛭石9%，硅藻土2%，丁腈橡胶9%，余量为硫酸钡；所述材料的制备方法如实施例1所述。（配方3） A low-noise, heat-fading resistant resin-based friction material, including the following components by mass percentage: 10% nano-alumina modified phenolic resin, 3% aramid pulp, 8% glass fiber, and 10% potassium titanate whisker , graphite 6%, antimony trisulfide 4%, coke 6%, alumina 1%, iron oxide 4%, cashew oil friction powder 6%, expanded vermiculite 9%, diatomaceous earth 2%, nitrile rubber 9% , the balance being barium sulfate; the preparation method of the material is as described in Example 1. (recipe 3)
实施例4 Example 4
一种低噪音、抗热衰退树脂基摩擦材料，按质量百分比包括如下组分：纳米氧化铝改性酚醛树脂15%，芳纶浆粕3%，玻璃纤维8%，钛酸钾晶须10%，石墨6%，三硫化二锑4%，焦炭6%，氧化铝1%，氧化铁4%，腰果油摩擦粉6%，膨胀蛭石9%，硅藻土6%，丁腈橡胶6%，余量为硫酸钡；所述材料的制备方法如实施例1所述。（配方4） A low-noise, heat-fading resistant resin-based friction material, including the following components by mass percentage: 15% nano-alumina modified phenolic resin, 3% aramid pulp, 8% glass fiber, and 10% potassium titanate whisker , graphite 6%, antimony trisulfide 4%, coke 6%, alumina 1%, iron oxide 4%, cashew oil friction powder 6%, expanded vermiculite 9%, diatomite 6%, nitrile rubber 6% , the balance being barium sulfate; the preparation method of the material is as described in Example 1. (Recipe 4)
实施例5 Example 5
一种低噪音、抗热衰退树脂基摩擦材料，按质量百分比包括如下组分：纳米氧化铝改性酚醛树脂15%，芳纶浆粕3%，玻璃纤维8%，钛酸钾晶须10%，石墨6%，三硫化二锑4%，焦炭6%，氧化铝1%，氧化铁4%，腰果油摩擦粉6%，膨胀蛭石6%，硅藻土2%，丁腈橡胶3%，余量为硫酸钡；所述材料的制备方法如实施例1所述。（配方5） A low-noise, heat-fading resistant resin-based friction material, including the following components by mass percentage: 15% nano-alumina modified phenolic resin, 3% aramid pulp, 8% glass fiber, and 10% potassium titanate whisker , graphite 6%, antimony trisulfide 4%, coke 6%, alumina 1%, iron oxide 4%, cashew oil friction powder 6%, expanded vermiculite 6%, diatomaceous earth 2%, nitrile rubber 3% , the balance being barium sulfate; the preparation method of the material is as described in Example 1. (Recipe 5)
为了验证本发明的效果，按照中国GB5763-1988国家标准，将实施例制备的摩擦材料与国内一些厂家生产的树脂基摩擦材料作为0号试样分别在定速摩擦试验机上进行试验，并用声级计采集噪声数据，进行对比。 In order to verify the effect of the present invention, according to China's national standard GB5763-1988, the friction material prepared in the embodiment and the resin-based friction material produced by some domestic manufacturers were used as No. 0 samples to test on a constant-speed friction testing machine, and the sound level Collect noise data for comparison.
本发明的低噪音、抗热衰退树脂基摩擦材料的的摩擦性能对比实验结果见下表1： The comparative experimental results of the friction performance of the low-noise, heat-fading-resistant resin-based friction material of the present invention are shown in Table 1 below:
表1 摩擦性能对比实验结果 Table 1 Friction performance comparison experiment results
摩擦性能对比实验结果表明，当温度在300℃以内材料可以使用，当温度升高至350℃，所述材料的摩擦系数较0号试样更接近0.3，因此，所述材料具有更优越的摩擦性能。 The friction performance comparison test results show that the material can be used when the temperature is within 300°C, and when the temperature rises to 350°C, the friction coefficient of the material is closer to 0.3 than that of No. 0 sample, therefore, the material has more superior friction performance.
本发明的低噪音、抗热衰退树脂基摩擦材料的磨损性能对比实验结果见下表2： The comparative experimental results of the wear performance of the low-noise, heat-fading-resistant resin-based friction material of the present invention are shown in Table 2 below:
表2 磨损性能对比试验结果 Table 2 Comparison test results of wear performance
本发明的低噪音、抗热衰退树脂基摩擦材料的噪声测试对比实验结果见下表3： The noise test comparison experiment results of the low-noise, heat-fading-resistant resin-based friction material of the present invention are shown in Table 3 below:
表3噪声测试对比试验结果 Table 3 Noise test comparison test results
从磨损性能与噪声测试实验结果可以看出，所述材料的磨损性能与噪声基本较对比材料低，所以本发明的低噪音、抗热衰退树脂基摩擦材料具有更好耐磨损性能和抗高温热衰退性能，制动噪音明显降低。 It can be seen from the experimental results of the wear performance and noise test that the wear performance and noise of the material are basically lower than those of the comparative material, so the low-noise, heat-fading resistant resin-based friction material of the present invention has better wear resistance and high temperature resistance Thermal fading performance, braking noise is significantly reduced.
所述实施例为本发明的优选的实施方式，但本发明并不限于上述实施方式，在不背离本发明的实质内容的情况下，本领域技术人员能够做出的任何显而易见的改进、替换或变型均属于本发明的保护范围。 The described embodiment is a preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation, without departing from the essence of the present invention, any obvious improvement, replacement or modification that those skilled in the art can make Modifications all belong to the protection scope of the present invention.
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| CN105647471A (en) * | 2014-11-30 | 2016-06-08 | 衡阳市安骋汽车配件有限公司 | Granule with noise reducing function and excellent heat conductive performance and preparation method thereof |
| CN105061982A (en) * | 2015-09-14 | 2015-11-18 | 国网山东省电力公司临沂供电公司 | Transformer sound insulation shell material and preparation method thereof |
| CN106336610A (en) * | 2016-07-31 | 2017-01-18 | 贾明昌 | High-temperature wear-resisting friction plate and production process thereof |
| CN106433013B (en) * | 2016-08-29 | 2019-01-11 | 贵州新安航空机械有限责任公司 | A kind of high-power locomotive Composition brake shoes friction material and preparation method |
| CN106811177B (en) * | 2017-02-17 | 2018-11-09 | 盐城工学院 | Low noise friction material and its preparation method and application |
| CN107353638B (en) * | 2017-07-03 | 2020-07-07 | 中国地质大学（武汉） | Resin-based friction material filled with granulated zirconia and preparation method thereof |
| CN108561467A (en) * | 2018-04-16 | 2018-09-21 | 中国科学院兰州化学物理研究所 | A kind of wind-driven generator Yaw brake block material and preparation method thereof |
| CN108794974A (en) * | 2018-05-14 | 2018-11-13 | 江苏大学 | A kind of low-loss clutch friction sheet material and its preparation method and application |
| CN109458423B (en) * | 2018-12-25 | 2021-02-19 | 淄博中矿汽车安全装置技术开发有限公司 | Ceramic brake pad |
| CN111075869A (en) * | 2019-12-04 | 2020-04-28 | 贵州新安航空机械有限责任公司 | Composite brake shoe material formula for railway freight car and preparation process of composite brake shoe |
| CN112980392A (en) * | 2021-03-03 | 2021-06-18 | 张豪 | Wear-resistant low-noise soft brake pad and preparation method thereof |
| CN113502030A (en) * | 2021-03-24 | 2021-10-15 | 浙江杭摩欧亿汽车零部件有限公司 | Friction material for automobile disc-drum parking brake shoe and preparation method thereof |
| CN115975336B (en) * | 2022-12-09 | 2024-11-08 | 湖北飞龙摩擦密封材料股份有限公司 | Low-noise friction material and preparation method and application thereof |
| CN115651287A (en) * | 2022-12-29 | 2023-01-31 | 沈阳远程摩擦密封材料有限公司 | Synthetic brake pad matched with urban rail aluminum alloy brake disc |
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