A carbon fiber powder modified paper-based friction material and its preparation method
A paper-based friction material and carbon fiber powder technology, which is applied in fiber raw material processing, synthetic cellulose/non-cellulose material pulp/paper, chemical instruments and methods, etc., can solve poor uniformity, high wear rate, friction coefficient change, etc. problem, to achieve the effect of uniform distribution, good uniformity and easy bonding
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Embodiment 1
[0022] Example 1: Weigh 45g of pretreated PAN-based carbon fiber powder, 4g of aramid fiber, 14g of kaolin, 24g of cashew nut shell oil-modified phenolic resin, and 100ml of absolute ethanol to prepare cashew nut shell oil-modified powder with a concentration of 0.24g / ml. ethanol solution of phenolic resin. After the carbon fiber powder, aramid fiber and kaolin are mixed in water at high speed by a high-speed beater, the slurry is further homogenized and dispersed in the refiner. After the preform is formed by the paper pattern taking system, the preform is dried at 80-100°C. The ethanol solution of cashew nut shell oil modified phenolic resin was used to uniformly impregnate the preform to make the resin content reach 27%, and the solvent ethanol was evaporated at room temperature. Then use a flat vulcanizing machine to heat press for 30 minutes under the conditions of a temperature of 160° C. and a pressure of 5.0 MPa to obtain a paper-based friction material. A QM1000-II ...
Embodiment 2
[0023] Example 2: Weigh 50 g of pretreated PAN-based carbon fiber powder, 3 g of aramid fiber, 13 g of kaolin, 23 g of cashew nut shell oil-modified phenolic resin, and 100 ml of absolute ethanol to prepare cashew nut shell oil-modified powder with a concentration of 0.23 g / ml. ethanol solution of phenolic resin. After mixing carbon fiber powder, aramid fiber and kaolin in water at high speed with a high-speed beater, the slurry is further dispersed and homogenized in a refiner. After the preform is formed by the paper pattern taking system, the preform is dried at 80-100°C. The ethanol solution of cashew nut shell oil modified phenolic resin is used to uniformly impregnate the preform, so that the resin content reaches 25%, and the solvent ethanol is evaporated at room temperature. Then use a flat vulcanizer to heat press for 25 minutes at a temperature of 165° C. and a pressure of 8.0 MPa to obtain a paper-based friction material. A QM1000-II wet friction material performa...
Embodiment 3
[0024] Example 3: Weigh 56g of pretreated pitch-based carbon fiber powder, 3g of aramid fiber, 11g of diatomaceous earth, 22g of nitrile rubber modified phenolic resin, and 100ml of absolute ethanol, and prepare nitrile with a concentration of 0.22g / ml Ethanol solution of rubber modified phenolic resin. After mixing pitch-based carbon fiber powder, aramid fiber and diatomaceous earth in water at high speed with a high-speed beater, the slurry is further dispersed and homogenized in a refiner. After the preform is formed by the paper pattern taking system, the preform is dried at 80-100°C. The prefabricated body is evenly impregnated with ethanol solution of NBR-modified phenolic resin, so that the resin content reaches 23%, and the solvent ethanol is evaporated at room temperature. Then use a flat vulcanizer to heat press for 20 minutes at a temperature of 170° C. and a pressure of 10.0 MPa to obtain a paper-based friction material. A QM1000-II wet friction material performa...
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