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Method for preparing friction material by wet type mixing material

A friction material and wet mixing technology, which is applied in the field of friction material preparation, can solve the problems of uneven dispersion of components, weak combination of resin and fiber, and large dosage, so as to achieve simple preparation process, improve friction performance and use Longevity and the effect of reducing production cost

Inactive Publication Date: 2009-07-22
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a friction material that is conducive to improving the performance of the friction material and has a simple process in view of the disadvantages of weak combination of resin and fiber, excessive dosage, and uneven dispersion of components that exist when dry blending is used in the current friction material preparation process. Method for preparing friction material by wet mixing with low cost

Method used

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  • Method for preparing friction material by wet type mixing material

Examples

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Effect test

example 1

[0020] Weigh 5 parts of phenolic resin and 0.05 parts of hexamethylenetetramine, dissolve in the mixed solution of industrial alcohol and xylene, add 1 part of silane coupling agent at the same time, stir well, add 8 parts of aramid fiber and 12 parts of steel Fiber, after stirring, add 1.5 parts of molybdenum disulfide, 4 parts of graphite, 16 parts of barite, 5 parts of wollastonite, and 4 parts of tire powder. After mixing and stirring evenly, dry in an oven at 90° C. for 24 hours to obtain a friction material.

example 2

[0022] Weigh 10 parts of boron-modified phenolic resin and 0.15 parts of urotropine, dissolve them in the mixed solution of industrial alcohol and acetone, add 2.5 parts of sodium dodecylbenzenesulfonate at the same time, stir evenly, add 8 parts of steel fiber and 10 parts of silicon carbide fiber and 10 parts of pitch carbon fiber, after stirring, add 3.5 parts of molybdenum disulfide, 7 parts of graphite, 30 parts of barite, 10 parts of wollastonite, and 10 parts of tire powder. After mixing and stirring evenly, dry in an oven at 120° C. for 8 hours to obtain a friction material.

example 3

[0024] Weigh 15 parts of melamine-modified phenolic resin, 0.5 part of hexamethylenetetramine and 3 parts of urotropine, dissolve them in a mixed solution of industrial alcohol and ethyl acetate, add 1.5 parts of sodium polyacrylate and 3 parts of ten Dialkyl sodium sulfate, after stirring evenly, add 15 parts of steel fiber and 18 parts of pitch carbon fiber, mix and stir evenly, and dry in an oven at 100°C for 12 hours. After drying the resin-coated fiber, add 5 parts of molybdenum disulfide, 15 parts of graphite, 30 parts of barite, 10 parts of alumina, and 10 parts of tire powder, and mix and stir for 5 hours to obtain a friction material.

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Abstract

The method for preparing a friction material by wet mixing disclosed by the present invention comprises the following steps: dissolving the resin in a solvent to form a resin solution, immersing the reinforcing fiber in the resin solution, and adding a surfactant at the same time, so that the resin and the reinforcing fiber are closely combined And disperse evenly; then mix the reinforcing fiber coated with resin on the surface with the friction performance regulator and filler, stir evenly and dry. The method is simple in process, uses the wet method to mix the friction material components, uses the fluidity of the resin solution to coat the fibers, realizes the uniform mixing of the fibers and the resin, and enhances the bonding strength of the resin and the fibers under the action of the surfactant, which can The amount of resin and fiber is reduced, and the production cost is reduced. At the same time, the fiber can be prevented from being pulled out by friction during the braking process, which is beneficial to improving the friction performance and service life of the brake pad. The friction material prepared by the invention can be widely used in the preparation of motor vehicle brake pads, machine tool and electrode brakes, clutch linings and the like.

Description

technical field [0001] The invention relates to a preparation method of friction materials, in particular to a preparation method of friction materials used for motor vehicle brake pads, machine tool and electrode brakes, clutch linings and the like. Background technique [0002] The friction material for automobile braking is also called brake pad. Its main function is to reduce the relative motion between the friction material and the parts it is attached to through friction, and at the same time convert kinetic energy into heat, and then absorb or dissipate the heat. Brake pads are one of the most important safety components in the car braking system, which is related to the life and property safety of car drivers. [0003] The raw materials of friction materials and brake pads for automobile braking are generally composed of resin, reinforcing fiber, friction performance modifier, etc. Traditional brake pads are mainly reinforced with asbestos fibers. Since asbestos was...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/14C08J5/04C08L61/06C08L61/14C08K5/42C08K3/00
Inventor 王焕平徐时清
Owner CHINA JILIANG UNIV