Non-copper friction material

A technology of friction materials and reinforcement materials, applied in other chemical processes, chemical instruments and methods, etc., to avoid copper pollution, improve noise and vibration performance, and improve the overall performance of products

Active Publication Date: 2014-03-05
SHANDONG DOUBLE LINK BRAKE MATERIAL
View PDF2 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the present situation that the existing friction materials at home and abroad all contain copper, the present invention develops a kind of friction material composed of ceramic fiber, aramid fiber, mineral fiber, potassium titanate whisker, calcium sulfate whisker, etc. Copper resin-based friction material avoids the problem of copper pollution and improves the comprehensive performance of friction materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Non-copper friction material
  • Non-copper friction material
  • Non-copper friction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Comparison of friction and wear experiments of different contents of potassium hexatitanate whiskers in ceramic formulations (according to GB5763-2008)

[0018] Test formula weight percent: nitrile modified phenolic resin 12%; ceramic fiber 10%, aramid fiber 3%, mineral fiber 5%, calcium sulfate whisker 4%, potassium hexatitanate whisker 5%, 10% respectively , 15%, 20%; fillers are 12% flexible graphite, 8% friction powder, 6% aluminum oxide, 5% heavy magnesium oxide, 4% nitrile rubber powder, 6% vermiculite, and 20% barium sulfate, respectively. 15%, 10%, 5%. See Table 1:

[0019] Table 1 Different K 2 O·6TiO 2 Experimental comparison of whisker content: according to GB5763-2008

[0020]

[0021] The test comparison shows that: the ceramic formula containing potassium hexatitanate whiskers, because of its good thermal stability, as the dosage increases, μ tends to be stable, and the wear rate gradually decreases and then increases as the content incre...

Embodiment 2

[0022] Example 2: Comparison test between potassium titanate whiskers and ordinary potassium titanate whiskers treated by coupling agent surface (according to GB5763-2008)

[0023] The percentage by weight of the test formula: potassium hexatitanate whiskers 10%, barium sulfate 15%, and others are the same as Example 1.

[0024] Use KH-570 methacryloxysilane coupling agent to modify the surface of potassium hexatitanate whiskers. The process is: add methacryloxysilane to ethanol solvent in a mass ratio of 1:5, and stir thoroughly until transparent; add 5% sodium silicate solution during the stirring process, and slowly add 0.1% dilute hydrochloric acid to pH=4.5; add potassium hexatitanate whiskers, ultrasonically disperse for 5-10 minutes, and stir at a constant temperature of 80°C for 0.5 hours, filtered and dried to remove the solvent. See Table 2:

[0025] Table 2 Comparison of potassium titanate whisker surface modification and unmodification experiments: according to G...

example 3

[0028] Example 3: Brake bench performance

[0029] Test formula weight percent: 12% nitrile modified phenolic resin; ceramic fiber 10%, aramid fiber 4%, mineral fiber 5%, potassium titanate whisker 7%, calcium sulfate whisker 4%; flexible graphite 12% , friction powder 8%, aluminum oxide 6%, heavy magnesium oxide 5%, nitrile rubber powder 4%, barium sulfate 20%.

[0030] According to the requirements of ISO26867-2009, the results are as follows:

[0031] ① Friction coefficient μ: the total average value is 0.43, the minimum is 0.36, and the maximum is 0.47, of which:

[0032] In the cold state, the average value of μ is 0.37, the high-speed terminal brake μ is 0.41, the minimum value of μ is 0.34 in the first decay, the minimum value of μ is 0.37 at 500°C, and the minimum value of μ in the second decay is 0.37.

[0033] ②Abrasion: Lining thickness wears 0.41mm, lining quality wears 6g; dual thickness wears 0.03mm, dual mass wears 2.2g

[0034] See Table 3:

[0035] Table 3...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
shear strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to the vehicle brake technology field, and concretely provides a non-copper friction material. The material is characterized in that the material is a non-copper ceramic fiber reinforcing resin-based friction material. In the formation of the formula system, non-copper design is added based on a formula of a ceramic fiber friction material. The reinforcing material is formed through mixing of a plurality of fibers of ceramic fibers, aramid fibers, mineral fibers and the like. Copper fibers in the original ceramic formula are replaced by potassium titanate whiskers, calcium sulphate whiskers and flexible graphite materials with high thermal conductivity. Modified resins are employed as binders, and other functional filling materials are added. Through continuous optimization design of the formula, the copper pollution problem is avoided, and the comprehensive properties of the friction material are raised. the dispersity of the whiskers in the composites is improved through modified treatment of the potassium titanate whisker surfaces, the interface binding properties among the plurality of materials in the formula system are raised, the mechanical strength of the products are raised, and the abrasion is lowered. Flexible graphite with high thermal conductivity is employed, the suitable heat-conducting property of the non-copper friction material is remained, and noise and vibration performances of a brake system are improved.

Description

Technical field: [0001] The invention relates to the technical field of braking of vehicles, in particular to a copper-free friction material. Background technique: [0002] With the increase of car ownership, the pollution caused by cars has been paid more and more attention by people, and the pollution of brake pads has also attracted people's attention. At present, copper materials are often used in high-performance friction brake materials represented by ceramic fiber formulations at home and abroad, but the pollution of copper in wear debris to the environment has not yet received due attention in China. Research in the United States in the early 1990s showed that vehicle brake pads were the main cause of copper pollution in the Santa Clair Valley and Gulf of California, USA. When the vehicle brakes, a part of the brake pads is ground into dust and enters the environment. Copper-containing dust can be deposited into the water body through rainwater and suspended partic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14
Inventor 耿家举
Owner SHANDONG DOUBLE LINK BRAKE MATERIAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap