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Brake gasket and its preparation method

A technology for brakes and linings, applied in the field of brake linings and its preparation, can solve the problems of not being able to better adapt to high-speed and heavy-load working conditions, material thermal decline and wear, and low thermal conductivity of asbestos fibers, etc., to achieve The effect of less wear on the pair, less heat decay, and tough texture

Inactive Publication Date: 2006-08-30
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal conductivity of asbestos fiber is low, and the frictional heat is not easy to dissipate, which leads to the thermal decay and aggravated wear of the material, making it unable to better adapt to high-speed and heavy-duty working conditions; at the same time, in the process of production and use, asbestos Dust has the effect of polluting the environment and causing cancer, and has a great impact on human health and the environment. It has attracted great attention from the domestic and foreign automobile industries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: first smooth the sisal fiber into bundles, and cut the length into short sisal fibers of 10 mm; soak the cut sisal fibers in a volume ratio of 1:1 dehydrated alcohol+benzene solution for 30 hours; take out The sisal fiber after soaking is cleaned successively with absolute ethanol and deionized water until the pH value of the sisal fiber is 7.5; the sisal fiber that has been cleaned is immersed in a 10% NaOH solution by weight percentage Boil in a water boiler at 75°C for 3 hours, take it out, cool to room temperature; wash the sisal fiber after alkali boiling with deionized water until the pH value of the sisal fiber is 7.0 and neutralize it with sulfuric acid solution; then use ion Wash with water to a pH value of 7.0; finally put the sisal fiber into an oven and process it at 150°C for 5.3 hours to make a spare sisal fiber raw material; soak the spare sisal fiber raw material with a concentration of 5% alcohol solution for 2 hours, Then dry the alcohol ...

Embodiment 2

[0009] Embodiment 2: Firstly, the sisal fibers are smoothed into bundles, and cut into short sisal fibers with a length of 20 mm; the cut sisal fibers are soaked in a volume ratio of 1:1 dehydrated alcohol+benzene solution for 24 hours; The sisal fiber after soaking is cleaned successively with absolute ethanol and deionized water until the pH value of the sisal fiber is 7.0; the cleaned sisal fiber is immersed in a 10% NaOH solution by weight percentage Boil in a water boiler at 78°C for 2 hours, take it out, cool to room temperature; wash the sisal fiber after alkali boiling with deionized water until the pH value of the sisal fiber is 7.2 and neutralize it with sulfuric acid solution; then use ion Wash with water until the pH value is 7.0; finally put the sisal fiber into the oven and process it at 158°C for 5.3, 6, 5.8, 4, 4.9, 5, 5.7, 4.5, 5.5 hours to make spare sisal fiber raw materials; The sisal fiber raw material is soaked in alcohol solution with a concentration of ...

Embodiment 3

[0010] Embodiment 3: first smooth the sisal fiber into bundles, and cut into short sisal fibers with a length of 15 mm; soak the cut sisal fibers in a volume ratio of 1:1 absolute ethanol+benzene solution for 25 hours; take out The sisal fiber after soaking is cleaned successively with absolute ethanol and deionized water until the pH value of the sisal fiber is 7.2; the cleaned sisal fiber is immersed in a 10% NaOH solution by weight percentage Boil in a water boiler at 76°C for 2.6 hours, take it out, and cool to room temperature; wash the sisal fiber after alkali boiling with deionized water until the pH value of the sisal fiber is 7.4 and neutralize it with sulfuric acid solution; then use ion Wash with water to a pH value of 7.0; finally put the sisal fiber into an oven and process it at 162°C for 5.8 hours to make a spare sisal fiber raw material; soak the spare sisal fiber raw material in 5% alcohol solution for 3 hours, Then dry the alcohol at a temperature not higher ...

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Abstract

The preparation process of brake gasket includes the following steps: preparing sisal fiber via cutting sisal into 10-20 mm long segment, soaking in anhydrous alcohol plus benzene solution, washing with anhydrous alcohol and deionized water, boiling in NaOH solution, cooling to room temperature, washing with deionized water to neutrality and stoving in stove; mixing sisal fiber, phonetic resin, copper powder, graphite powder, MoS2, pre-polymer, metal oxide, butadiene-acrylonitrile rubber, non-metal compound and barium sulfate in a high speed mixer to form mixture material; making blank with the mixture material; hot pressing the blank to form; and heat treatment at 190-200 deg.c. The present invention makes asbestos-free brake gasket with sisal fiber as reinforcing material, and the brake gasket has stable friction coefficient, less heat degradation, low wear, no couple wear, smooth braking, low noise and no environmental pollution.

Description

technical field [0001] The invention belongs to plant fiber composite friction material, in particular to a brake lining and a preparation method thereof. Background technique [0002] Brake lining is a friction material widely used in automobiles, trains, construction and engineering machinery, etc. Traditional brake linings mostly use asbestos as the reinforcing fiber. However, the thermal conductivity of asbestos fiber is low, and the frictional heat is not easy to dissipate, which leads to the thermal decay and aggravated wear of the material, making it unable to better adapt to high-speed and heavy-duty working conditions; at the same time, in the process of production and use, asbestos Dust has the effect of polluting the environment and causing cancer, and has a great impact on human health and the environment. It has attracted great attention from the domestic and foreign automobile industries. Therefore, in many industrially developed countries, legislation has be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/20B29C43/02B29K61/04B29L31/16
Inventor 徐欣程光旭郑万春宋月贤刘飞清
Owner XI AN JIAOTONG UNIV
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