Whisker reinforced resin-base composite friction material and its prepn process
A technology of composite friction material and reinforced resin matrix, which is applied in the field of whisker reinforced resin matrix composite friction material and its preparation, can solve the problem that the related properties such as mechanical and thermal properties are difficult to be optimally matched, hinder the application of resin matrix composite materials, and the improvement of wear resistance is not enough. Significant other problems, to achieve the effect of rich raw materials, reduce lubrication maintenance costs, improve work reliability and service life
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[0019] The above-mentioned preparation method of whisker-reinforced resin-based composite friction material is characterized in that it comprises the following preparation steps:
[0020] (a) drying calcium carbonate whiskers and polyether ether ketone raw materials at a temperature of 130-150° C. for 3-5 hours;
[0021] (b) Mix the dried calcium carbonate whiskers and polyetheretherketone raw materials in step (a), put them into a mixer, and stir and mix at a high speed for 8 to 10 minutes at a rotation speed of not less than 1000 rpm;
[0022] (c) Put the material stirred in step (b) into the mold cavity of a hot-pressing mold at 380-390°C and melt it, pressurize 20Mpa to shape the material, keep the pressure for 8-10 minutes, and when the temperature of the mold cools to 100°C, take off Mold cooled to room temperature;
[0023] (d) keeping the material after demoulding and cooling in step (c) at a temperature of 250° C. for 1 hour to obtain a product.
Embodiment 1
[0025] Embodiment 1 (preferred embodiment)
[0026] Take 5 parts of calcium carbonate whiskers and 95 parts of polyether ether ketone as raw materials, wherein the calcium carbonate whiskers have a length of 30 μm, an aspect ratio of 20, and a density of 2.86 g / cm 3 , the density of polyether ether ketone is 1.32g / cm 3 , the particle size is less than 100 μm, prepared according to the following steps:
[0027] (a) drying calcium carbonate whiskers and polyetheretherketone raw materials at a temperature of 130° C. for 5 hours;
[0028] (b) Take the calcium carbonate whiskers dried in step (a) and mix them with polyether ether ketone raw materials, put them into a blender, and stir and mix at a high speed of not less than 1000 rpm for 8 minutes;
[0029] (c) Put the material stirred in step (b) into the mold cavity of a 380°C hot-pressing mold to melt, pressurize at 20Mpa to shape the material, hold the pressure for 8 minutes, and when the mold cools down to 100°C, demould and...
Embodiment 2
[0031] Embodiment 2 (preferred embodiment)
[0032] Take 15 parts of calcium carbonate whiskers and 85 parts of polyether ether ketone as raw materials, wherein the calcium carbonate whiskers have a length of 25 μm, an aspect ratio of 25, and a density of 2.86 g / cm 3 , the density of polyether ether ketone is 1.32g / cm 3 , the particle size is less than 100 μm, prepared according to the following steps:
[0033] (a) drying calcium carbonate whiskers and polyetheretherketone raw materials at a temperature of 140° C. for 4 hours;
[0034] (b) Take the calcium carbonate whiskers dried in step (a) and mix them with polyether ether ketone raw materials, put them into a blender, and stir and mix at a high speed for 9 minutes at a rotation speed of not less than 1000 rpm;
[0035] (c) Put the material stirred in step (b) into the cavity of a 385°C hot-pressing mold to melt, pressurize at 20Mpa to form the material, hold the pressure for 9 minutes, and when the temperature of the mol...
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