Non-woven fabric reinforced wet friction material with double-layer structure and anhydrous preparation method
A technology of wet friction material and double-layer structure, which is applied in the direction of abrasives, manufacturing tools, metal processing equipment, etc., can solve the problems of large amount of water, poor comprehensive performance of materials, and incomplete structure of friction layer, etc., to achieve anhydrous, performance Considerable effect of improving overall performance
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Embodiment 1
[0029] Example 1: The material composition is 28.6% of aramid fiber and nylon fiber, 3.4% of aluminum oxide, 1.7% of graphite, 2.4% of barite, 1.7% of potassium feldspar powder, 2.7% of kaolin, 0.7% of molybdenum disulfide, and 1.7% of fluorite powder %, phenolic resin 57.1%.
[0030] Step 1: Put the chopped aramid fiber and nylon fiber into the cotton feeder. After being loosened by the opener, they are carded into a thin single fiber web by a carding machine, and then air-laid to obtain a three-dimensional non-oriented fiber web. After the fiber web is superimposed layer by layer, the needle punching machine is used at a needle punching density of 26 needles / cm 2 Acupuncture according to the parameters to obtain a loose and porous non-woven fiber preform A;
[0031] Step 2: Weigh 14.3% by weight of the phenolic resin of the friction material and dissolve it in absolute ethanol solution to obtain an alcohol solution B of 20% by weight of the phenolic resin, and spray the sol...
Embodiment 2
[0035] Example 2: The material composition is 28.6% of aramid fiber and carbon fiber pre-oxidized wire, 3.0% of alumina, 1.7% of graphite, 2.4% of barite, 1.7% of potassium feldspar powder, 2.7% of kaolin, 0.7% of molybdenum disulfide, fluoride Stone powder 1.7%, carbon black 0.4%, phenolic resin 48.5%, liquid silicone rubber 8.6%.
[0036] Step 1: Put the chopped aramid fiber and carbon fiber pre-oxidized yarn into the cotton feeder. After being loosened by the opener, it is carded into a thin single-fiber web by a carding machine, and then air-laid to obtain a three-dimensional non-oriented web. After the fiber web is superimposed layer by layer by the machine, the needle punching machine uses a needle punching density of 26 needles / cm 2 Acupuncture according to the parameters to obtain a loose and porous non-woven fiber preform A;
[0037] Step 2: Weigh 14.3% by weight of the phenolic resin of the friction material and dissolve it in absolute ethanol solution to obtain an al...
Embodiment 3
[0041] Example 3: The material composition is 22.2% of aramid fiber and carbon fiber pre-oxidized wire, 5.3% of alumina, 2.6% of graphite, 3.7% of barite, 2.6% of potassium feldspar powder, 4.2% of kaolin, 1.0% of molybdenum disulfide, fluoride Stone powder 2.0%, sublimated sulfur 0.8%, phenolic resin 42.3%, nitrile rubber 13.3%.
[0042] Step 1: Put the chopped aramid fiber and carbon fiber pre-oxidized yarn into the cotton feeder. After being loosened by the opener, it is carded into a thin single-fiber web by a carding machine, and then air-laid to obtain a three-dimensional non-oriented web. After the fiber web is superimposed layer by layer by the machine, the needle punching machine uses a needle punching density of 26 needles / cm 2 Acupuncture according to the parameters to obtain a loose and porous non-woven fiber preform A;
[0043] Step 2: Weigh 11.1% by weight of the friction material phenolic resin and dissolve it in absolute ethanol solution to obtain an alcohol s...
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