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Vehicle composite friction material containing potassium titanate whisker and preparation method thereof

A composite friction material and potassium titanate whisker technology, which is applied in the field of composite friction materials, can solve the problems of reduced friction plate strength, poor friction coefficient stability, and increased wear, and achieve reduced noise pollution, stable chemical properties, and reduced friction. The effect of slow energy transfer

Inactive Publication Date: 2008-06-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In use, it is found that the semi-metallic friction material has the following disadvantages: steel fibers are easy to rust, and after rusting, there may be adhesion or damage, which reduces the strength of the friction plate, aggravates wear, and deteriorates the stability of the friction coefficient; although the semi-metallic friction material eliminates The high-frequency noise easily produced by asbestos friction materials is eliminated, but the low-frequency noise at low speed is easy to produce
However, due to the high price, it has affected its popularization and use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: Taking Jetta front wheel brake pads as an example

[0046] In terms of mass percentage, the basic formula of the composite friction material containing potassium titanate is: 20% cashew nut oil modified phenolic resin; 5% nitrile rubber; 15% crystalline potassium titanate, with a diameter of 0.5-1.0um; Potassium 5%; Vermiculite 5%; Aramid fiber (Kevlar fiber) 1%; Sepiolite fiber 4%, Aluminum oxide 6%; Talc powder 6%; Molybdenum disulfide 5%; Barium sulfate 20%; Calcium hydroxide 8%. Mix the above materials evenly, weigh them and pour them into the mold for compression molding, the temperature is 145C°; the pressure is 12Mpa; the holding time is 7 minutes (0.5-1 min / mm) and deflated twice; the height after pressing 12mm, the pressed material is put into a constant temperature box, and after 20 hours of heat preservation treatment at a temperature of 150C°, it is then machined, painted, and packaged to obtain a composite for vehicles containing potassium ti...

Embodiment 2

[0051] Embodiment 2: Taking Jetta front wheel brake pads as an example

[0052] Basic formula (by mass fraction): cashew oil modified phenolic resin 15%; nitrile rubber 3%; crystalline potassium titanate 20%; scaly potassium titanate 3%; vermiculite 3%; Kevlar fiber 1%; Sepiolite fiber 5%, alumina 12%; talc powder 10%; molybdenum disulfide 3%; barium sulfate 15%; calcium hydroxide 10%. The above materials are evenly mixed, weighed and poured into a mold for compression molding, the temperature is 150C °; the pressure is 10Mpa; the holding time is 8 minutes (0.5-1 min / mm) and deflated 3 times; the height after pressing is 12mm, the pressed material was put into a constant temperature box at a temperature of 155°C for 24 hours of heat preservation treatment, and then mechanically processed, painted, and packaged to obtain a composite friction material for vehicles containing potassium titanate whiskers.

[0053] Table 2 shows the friction and wear test results of the friction m...

Embodiment 3

[0056] Embodiment 3: Take the Jetta front wheel brake pad as an example

[0057] Basic formula (by mass fraction): cashew nut oil modified phenolic resin 25%; nitrile rubber 6%; crystalline potassium titanate 10%; scaly potassium titanate 6%; vermiculite 8%; Kevlar fiber 2%; Sepiolite fiber 3%, alumina 9%; talc powder 12%; molybdenum disulfide 4%; barium sulfate 10%; calcium hydroxide 5%. The above materials are evenly mixed, weighed and poured into a mold for compression molding. The temperature is 155C°; 12mm, the pressed material is put into a constant temperature box, and the temperature is 160C °, after 12 hours of heat preservation treatment, then mechanical processing, painting, packaging, and a composite friction material for vehicles containing potassium titanate whiskers.

[0058] Table 3 shows the friction and wear test results of the friction material according to the national standard (GB5763-1998). In Table 3, the values ​​of the friction coefficients at 100°C ...

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Abstract

The present invention discloses vehicle composite friction material with potassium titanate crystal whisker and the preparation method. In terms of weight percentage, the composite friction material includes the following components: 10 to 50 percent of cashew oil modified phenol formaldehyde resin, 3 to 8 percent of NBR, 10 to 20 percent of crystal potassium titanate, 3 to 8 percent of squamose potassium titanate, 3 to 8 percent of vermiculite, 1 to 3 percent of aramid fiber, 3 to 8 percent of meerschaum fiber, etc. In preparation, the composite friction material is made into prepare material according to the proportion, the prepare material is evenly mixed and poured into a die for pressing and molding, and then the pressed finished product is taken out; the pressed finished product is put into a constant-temperature box and processed for 8 to 24 hours under the temperature of 145 to 165 DEG C, thus finally obtaining the vehicle composite friction material with potassium titanate crystal whisker. The prepared material has stable chemical performance and no toxin and harm; the potassium titanate powder produced by the friction of crystal whisker in braking process will rapidly settle down on the ground, thus preventing the body hurt and air pollution.

Description

technical field [0001] The invention relates to a composite friction material, in particular to a metal fiber-free composite friction material for vehicles containing potassium titanate whiskers and a preparation method thereof. Background technique [0002] In the development process of composite friction materials, a large number of patented technologies and applied research are used to perfect and improve the tribological characteristics of composite friction materials, making it more suitable for the needs of the development of the automobile industry. The composition of the composite friction material is the main factor that determines its tribological properties. Among the many components that make up the composite friction material, each component plays a certain role in the braking effect. [0003] Whiskers, also known as crystal fibers, are very thin single crystals, usually only a few microns in diameter. The thick whiskers are needle-shaped, and the thin whiskers...

Claims

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Application Information

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IPC IPC(8): C08J5/14C08L61/14C08K7/04C08L9/02C08K3/34
Inventor 陈东
Owner SOUTH CHINA UNIV OF TECH
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