Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Friction material for preparing NAO brake pad

A friction material and brake pad technology, applied in the field of automobile brake pads, can solve the problems of dirty appearance of the wheel hub, color pollution of the wheel hub, braking noise of the brake pad, etc., and achieve the effect of good visual effect, low wear rate and stable braking effect.

Active Publication Date: 2012-10-31
HANGZHOU UNITED FRICTION MATERIAL
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powdered calcium carbonate particles are very small, and it is used as an inorganic filler in the friction material to fill the gap between the components in the friction material, so that the porosity of the finished friction material is reduced, and it is easy to cause brake noise during the use of the brake pad.
[0007] In addition, the friction material particles commonly used in the market are black: because the color of the automobile wheel is silver, the application of black particles and raw materials will produce black powder after braking, which will cause color pollution to the wheel, resulting in a dirty appearance of the wheel. poor visual effect

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
  • Friction material for preparing NAO brake pad
  • Friction material for preparing NAO brake pad
  • Friction material for preparing NAO brake pad

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Ceramic fiber 5%, mineral fiber 15%, resin 10%, chalcocite powder 6%, graphite 10%, barium sulfate 18%, biological calcification particles 5%, coke 5%, friction reducing agent 10%, performance adjustment Agent 5%, filler 11%, total 100%.

[0023] The above-mentioned materials were made into brake pads according to the conventional pressing method, and tested according to 4 types on a fixed-speed testing machine according to the GB5763-2008 standard. The results are shown in Table 1.

[0024] Table 1:

[0025]

[0026] It can be seen from the data in Table 1 that the friction coefficient of the friction material obtained in Example 1 of the present invention changes little. In the heating stage, the friction coefficient is between 0.35-0.40, and in the cooling stage, the friction coefficient is between 0.33-0.44, and the wear rate is small, stable at 0.11-0.25*10 -7 / N.m, when the maximum value appears at 200℃, only 0.45*10 -7 / N.m, fully up to national standards. After exten...

Embodiment 2

[0028] Ceramic fiber 12%, mineral fiber 6%, resin 8%, chalcocite powder 10%, graphite 15%, barium sulfate 10%, biological calcification particles 10%, coke 4%, friction reducing agent 10%, performance adjustment Agent 5%, filler 10%, total 100%.

[0029] The above-mentioned materials were made into brake pads according to the conventional pressing method, and they were tested according to 4 types on a constant speed testing machine according to the GB5763-2008 standard. The results are shown in Table 2.

[0030] Table 2:

[0031]

[0032] It can be seen from the data in Table 2 that the friction material obtained in Example 2 of the present invention has a friction coefficient of 0.36-0.40 in the heating stage, and a friction coefficient of 0.32-0.42 in the cooling stage, and has a low wear rate, which fully meets the national standard. After extensive use in the taxis of Santana, Sonata and Jetta, the braking is stable, the braking noise is small, and the friction material life rea...

Embodiment 3

[0034] Ceramic fiber 8%, mineral fiber 7%, resin 6%, chalcocite powder 8%, graphite 12%, barium sulfate 10%, biological calcification particles 15%, coke 3%, friction reducing agent 13%, performance adjustment Agent 8%, filler 10%, total 100%.

[0035] The above-mentioned materials were made into brake pads according to the conventional pressing method, and they were tested in 4 categories on a constant-speed testing machine according to the GB5763-2008 standard. The results are shown in Table 3.

[0036] table 3:

[0037]

[0038] It can be seen from the data in Table 3 that the friction material obtained in Example 3 of the present invention has a friction coefficient of 0.35-0.41 during the heating stage, and a friction coefficient of 0.33-0.45 during the cooling stage, and has a low wear rate, which fully meets the national standard. After extensive use in the taxis of Santana, Sonata and Jetta, the braking is stable, the braking noise is small, and the friction material life re...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
friction coefficientaaaaaaaaaa
Login to View More

Abstract

The invention discloses a friction material for preparing NAO brake pads, which is prepared with the following materials by weight through a conventional brake pad compacting method: 5-15% of ceramic fibers, 5-15% of mineral fibers, 5-10% of resin, 5-10% of chalcocite powder, 10-20% of graphite, 10-20% of barium sulfate, 3-15% of biologically calcified particles, 3-10% of coke, 10-20% of antifriction agents, 5-10% of performance modifying agents, and 10-20% of fillers. The friction material of the invention contains natural biologically calcified particles as fillers, and is used to prepare brake pads together with other raw materials through a conventional brake pad compacting method. According to GB5763-2008, the brake pad is tested as the fourth class on a fixed speed test machine; thefriction coefficient is stable; during a temperature increasing period, the friction coefficient is 0.35-0.40, and during a temperature decreasing period, the friction coefficient is 0.33-0.44; the wear rate is low, is stabilized within 0.11-0.25*10-7 / N.m with a maximum of only 0.45*10-7 / N.m which occurs at 200 DEG C; and the national standard is completely reached. By widely used in Santana, Sonata and Jetta taxis, the brake pad has smooth braking and low braking noise, and the life of the friction material is up to above 35000 kilometers.

Description

Technical field [0001] The invention relates to automobile brake pads, in particular to a friction material for preparing NAO brake pads. Background technique [0002] The most important safety system in a car is the braking system, and all braking components are safety parts. Brake pads are one of the important links in the entire braking system, and it will directly affect the reliability of the entire braking system. [0003] The friction between the brake pads and the brake discs forms a frictional couple, which generates braking torque and converts the kinetic energy of the car into heat energy. During braking, the temperature of the brake pads and brake discs will rise by 300-400°C. Brakes Brake pads and brake discs are the most stressed components in vehicles, and they are susceptible to extreme high temperature, mechanical and chemical loads. In addition, the brake pads are exposed to the external environment for a long time, such as humidity, salt spray, dust and stains,...

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 Patents(China)
IPC IPC(8): C04B26/02
Inventor 陈忠
Owner HANGZHOU UNITED FRICTION MATERIAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com