Preparation method of friction particles, composition of friction particles and friction material and friction material

A technology of friction particles and friction materials, which is applied in the direction of friction linings, mechanical equipment, etc., can solve the problems of friction materials such as poor thermal decay resistance, undisclosed granulation, and high hardness, so as to improve thermal degradation resistance, reduce hardness, The effect of stabilizing the coefficient of friction

Active Publication Date: 2011-06-22
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Although the above two patent documents respectively disclose the granulation of all raw materials or the combination of grinding powder and rubber, neither of them discloses how to granulate. The resulting friction material has poor thermal fading resistance and high hardness

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  • Preparation method of friction particles, composition of friction particles and friction material and friction material

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preparation example Construction

[0021] The invention provides a method for preparing friction particles, wherein the method comprises: uniformly mixing friction particle raw materials with water to form a slurry, wherein the friction particle raw materials contain fibers, resins, water-soluble binders and fillers, and The weight ratio of the amount of water used to the amount of water-soluble binder is 1-3:1; the slurry is granulated to obtain granules; and the granules are dried at 100-120° C. for 30-60 minutes.

[0022] The preparation method is to uniformly granulate the friction particle raw materials with water and then dry at 100-120°C. During the drying process, the water in the particles will evaporate, and the evaporation of water will make the prepared friction particles become open-pored. The porous shape is 1-10%, so that the liquid substance generated by the thermal decomposition of the resin can be further locked in the gap in the thermocompression molding, thereby improving the thermal fading r...

Embodiment 1

[0043] (1) Preparation of friction particles

[0044] Take each powder for subsequent use, specifically: 5 parts of fibers with an average length of 1 mm (wherein, 1 part of steel fiber, 1 part of composite mineral wool, and 3 parts of aramid pulp), 6 parts of fibers with an average particle diameter of 30 microns Resin (cashew nut oil modified resin), 7 parts of water-soluble binders (sodium polyacrylate) with an average particle diameter of 40 microns, 82 parts of fillers with an average particle diameter of 30 microns (wherein, 30 parts of flake graphite powder, ferrochrome 10 parts of ore, 22 parts of kaolin, 20 parts of barite).

[0045] Add 7 parts of sodium polyacrylate to 14 parts of water and stir evenly, then add the above-mentioned other powders and mix thoroughly in the mixer, granulate into cylindrical particles with an average diameter of 1mm and an average length of 3mm through a granulator, and send them into the oven Bake at 100°C for 30 minutes. Friction pa...

Embodiment 2

[0052] (1) Preparation of friction particles

[0053] Take each powder for subsequent use, specifically: 10 parts of fibers with an average length of 2 mm (wherein, 3 parts of steel fibers, 5 parts of composite mineral wool, 2 parts of aramid pulp), 10 parts of fibers with an average particle diameter of 40 microns Resin (cashew nut oil modified resin), 10 parts of water-soluble binder (sodium polyacrylate) with an average particle diameter of 60 microns, 70 parts of fillers with an average particle diameter of 45 microns (wherein 25 parts of flake graphite, ferrochrome Ore 10, High Territory 25, Barite 10).

[0054] Add 10 parts of sodium polyacrylate to 10 parts of water and stir evenly, then add the above-mentioned other powders and mix thoroughly in a mixer, granulate into spherical particles with an average diameter of 2mm, and send them to an oven for 60 minutes at 120°C . Friction particles A2 were produced.

[0055] (2) Preparation of friction material composition ...

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Abstract

The invention provides a preparation method of friction particles. The method comprises the following steps of: uniformly mixing the friction particles as raw materials with water to obtain slurry, wherein the friction particles as the raw material contain fibers, resin, a water-soluble adhesive and a filler, and the weight ratio of water to the water-soluble adhesive is (1-3):1; pelletizing the slurry to obtain particles; and drying the particles at the temperature of between 100 DEG C and 120 DEG C for 30-60 minutes. The invention also provides friction particles obtained by the method provided by the invention. The invention provides a friction material composition, wherein the friction material composition contains the friction particles, tubular fibers, powder resin and a powder filler; and the friction particles are the friction particles provided by the invention. The invention also provides a friction material for preparing a brake pad. The friction material is obtained by performing hot press molding and thermal treatment on the friction material composition, wherein the friction material composition is the friction material composition provided by the invention.

Description

technical field [0001] The invention relates to a preparation method of friction particles, the friction particles prepared by the method, a friction material composition containing the friction particles and a friction material. Background technique [0002] Disclosed in CN 101070395A is a manufacturing method of a carbon / carbon-silicon carbide composite material brake shoe brake pad, which is characterized in that, using end-cut carbon fiber, carbon powder, resin, pitch, Si powder and SiC powder as raw materials, through Ingredients mixing, granulation, low-temperature hot-press forming, high-temperature sintering, resin impregnation curing, carbonization, and friction surface grinding processes to manufacture C / C-SiC composite brake shoes; the specific process parameters are: [0003] (1) Raw materials: chopped carbon fiber with a length of 2-15mm, carbon powder with a particle size of 0.075-0.30mm, Si powder with a particle size of 0.075-0.30mm, resin powder or asphalt p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/14C08J9/28C08L33/02F16D69/02
Inventor 旷文敏王伟侯振宇
Owner BYD CO LTD
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