Modified friction particle for friction material and preparation method thereof

A technology of friction particles and friction materials, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of lack of elasticity, inability to take into account porosity, poor high temperature performance, etc., to reduce the impact of friction materials and noise generation, The effect of avoiding high temperature brake failure and reducing braking torque

Active Publication Date: 2016-10-05
HANGZHOU UNITED FRICTION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing added particles are divided into 3 categories: Category 1 is mostly coke, graphite, tire powder, waste flakes and crushed particles of about 1-3mm in size. These substances have a single basic performance and have limited impact on the overall performance of friction materials; Category 2 It is a particle made by high-speed stirring of a mixture of liquid resin and ordinary friction material. This kind of material is hardened and lacks elasticity after being pressed at high temperature during the subsequent processing of friction material; Type 3 is ordinary rubber compound, and the rubber compound has enough Good elasticity, but low porosity and poor high temperature performance
The above particles are often limited by materials or processes, resulting in single performance, unable to take into account porosity, elasticity and high temperature friction performance stability

Method used

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  • Modified friction particle for friction material and preparation method thereof
  • Modified friction particle for friction material and preparation method thereof
  • Modified friction particle for friction material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: Modified particle-1

[0041] The proportion is: alumina 10% + zirconia 10%, American Pama black powder 10% + Dutch D powder 15%, manganese sulfide 6% + zinc sulfide 9% + copper sulfide 4%, unexpanded silver white leech Stone powder 3% + graphite 4%, nitrile rubber 6% + styrene butadiene rubber 12%, liquid resin 3% + nitrile latex 2%, performance regulator 5%, rubber additive 1%. Total 100%.

[0042] The preparation method of modified granules (the same below): After pre-mixing all raw materials, add rubber kneader for rubber kneading, after initial curing, open and coarsely crush granules with a size of 3-5 cm. Preliminary vulcanization is maintained for 3 hours in the hot air furnace without pressure, and then crushed into 1-3mm particles, which is the product.

[0043] The modified particles obtained above were added to friction material formula 2 as a substitute for conventional fillers, so that the modified particles accounted for 25% of the total mass...

Embodiment 2

[0051] Embodiment 2: Modified particle-2

[0052] Formula: alumina 18% + zirconia 12%, American Perma black powder 10% + Dutch D powder 10%, manganese sulfide 4% + zinc sulfide 4% + copper sulfide 2%, unexpanded silver white vermiculite powder 7 % + graphite 8%, nitrile rubber 5% + styrene butadiene rubber 7%, liquid resin 2% + nitrile latex 1%, performance regulator 9.5%. Rubber additives 0.5%. Total 100%.

[0053] Add the modified particles obtained above as a substitute for conventional fillers into the friction material formula 2, so that the modified particles account for 25% of the total mass of raw materials, and make brake linings according to the conventional pressing method, at a constant speed according to the GB5763-2008 standard Test according to 4 categories on the testing machine, and the results are shown in Table 4. Other physical performance tests are shown in the remarks.

[0054] Table 4: Constant speed test Standard: GB5763-2008

[0055]

[0056] N...

Embodiment 3

[0058] Embodiment 3: Modified particle-3

[0059] Formula: alumina 12% + zirconia 8%, American Perma black powder 15% + Dutch D powder 15%, manganese sulfide 4% + zinc sulfide 4% + copper sulfide 3%, unexpanded silver white vermiculite powder 3 % + graphite 5%, nitrile rubber 7% + styrene butadiene rubber 9%, liquid resin 2.5% + nitrile latex 1.5%, performance modifier 10%, rubber additive 1%. Total 100%.

[0060] Add the modified particles obtained above as a substitute for conventional fillers into the friction material formula 2, so that the modified particles account for 25% of the total mass of raw materials, and make brake linings according to the conventional pressing method, at a constant speed according to the GB5763-2008 standard According to 4 types of tests on the testing machine, the results are shown in Table 5. Other physical performance tests are shown in the remarks.

[0061] Table 5: Constant speed test Standard: GB5763-2008

[0062]

[0063] Note: har...

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Abstract

The invention relates to modified friction particles for a friction material and a preparation method of the modified friction particles. The modified friction particles are mainly prepared from the following components in percentage by mass: 20-30 percent of aluminum oxide and zirconium dioxide, 20-30 percent of American Parma black powder and Netherland D powder, 10-20 percent of manganese sulfide, zinc sulfide and copper sulfide, 7-15 percent of unexpanded silvery white vermiculite power and graphite, 12-18 percent of butadiene-acrylonitrile rubber and butadiene styrene rubber, 3-5 percent of liquid resin and acrylonitrile-butadiene rubber latex, 5-10 percent of a performance modifying agent and 0.5-1 percent of rubber ingredients. A brake lining manufactured from the friction material containing the modified friction particles disclosed by the invention has high porosity and low hardness; in the test process and the actual application process, the brake lining does not generate noise, has comfortable brake foot sense, can take response quickly, and can reach the service life requirement when used in various severe conditions; after the modified friction particles are used in urban bus brake discs in a large quantity, the service life of the friction material can be over 35000km.

Description

technical field [0001] The invention relates to a raw material used for making friction materials, in particular to a modified friction particle used for friction materials and a preparation method thereof. Background technique [0002] Due to the vigorous popularization of domestic automobiles, people have higher and higher requirements for the performance of automobiles, especially for the braking system involving safety. In addition, the noise, foot feel and other comfort aspects Additional requirements are also increasing. There are more and more researches on brake linings related to safety and comfort in the braking system. Generally, the manufacture of friction materials is obtained by mixing various raw materials in a dry state and then pressing the mixture. The various raw materials are basically uniform powder or fiber material, and the mixed material is basically evenly distributed. The properties of the products prepared by this method are uniform, but many prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/14C08J5/14C08L9/02C08L9/06C08L9/04C08L91/00C08K13/02C08K3/22C08K3/30C08K3/34C08K3/04C08K3/06C08K5/47
Inventor 陈忠
Owner HANGZHOU UNITED FRICTION MATERIAL
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