Friction material without asbestos and producing process

A friction material and a manufacturing method technology, applied in the field of brake friction lining material manufacturing, can solve the problems of unsatisfactory thermal recession and thermal recovery performance, increase production cost, complex production process, etc., and achieve eradication of pollution and harm to human health. , the effect of reducing raw material and production costs, and eliminating the need for complex processes

A friction material and a manufacturing method technology, applied in the field of brake friction lining material manufacturing, can solve the problems of unsatisfactory thermal recession and thermal recovery performance, increase production cost, complex production process, etc., and achieve eradication of pollution and harm to human health. , the effect of reducing raw material and production costs, and eliminating the need for complex processes

CN1458179AInactive Publication Date: 2003-11-26宋强 +1
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Material composition ratio (percentage by weight): 18% resin, 24% iron ore powder, 1% dead-burned magnesium, 2% alumina, 3% phosphorite powder, 3% silicon dioxide, 5% barite, silicon 8% limestone, 5% carbon black, 2% calcium carbonate, 2% graphite, 2% tire powder, 18% plant fiber, 1% sepiolite, 5% steel fiber, 1% zinc stearate. The production process is to weigh the above-mentioned raw materials according to the proportion, add them into the mixer and stir evenly, put the mixed materials in the oven, preheat for 30 minutes at a temperature of 110-130°C, and put the preheated materials, Weigh according to the product specifications, place in the mold at a temperature of 165-170°C and a pressure of 250kg / cm 2 Under hot pressing, the holding time depends on the thickness of the product, generally 5 to 20 minutes. After the pressure is released, the product is vulcanized. First, vulcanize at a vulcanization temperature of 140±3°C for 2 hours, and then at a temperature of 16...

Embodiment 2

[0012] Material composition ratio (percentage by weight): 10% resin, 5% iron ore powder, 9% dead-burned magnesium, 8% alumina, 4% phosphorite powder, 1% silicon dioxide, 1% barite, silicon 14% gray stone, 1% carbon black, 14% calcium carbonate, 1% graphite, 9% tire powder, 1% plant fiber, 18% sepiolite, 2% steel fiber, 2% zinc stearate. The production process is as described in Example 1.

Embodiment 3

[0014] Material composition ratio (percentage by weight): 14% resin, 10% iron ore powder, 3% dead-burned magnesium, 4% alumina, 1% phosphorite powder, 6% silicon dioxide, 19% barite, silicon 1% limestone, 8% carbon black, 1% calcium carbonate, 9% graphite, 3% tire powder, 8% plant fiber, 8% sepiolite, 1% steel fiber, 4% zinc stearate. The production process is as described in Example 1.

[0015] test

[0016] From the test quality inspection results in the above table, it is shown that the novel non-asbestos friction material of the present invention has excellent friction performance, wear resistance, and thermal fading stability, and it is used to make friction plates for medium and heavy vehicles, especially drum brakes. disc, good braking performance, high safety and reliability, low noise and no damage to the dual components. Because the cost of raw materials and production process is low, the cost price of the product is much lower than that of the existing no...

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Abstract

The friction material without asbestos consists of modified phenolic resin, iron ore powder, re-burnt magnesite, alumina, clinostrengite powder, silica, barytine, wollastonite, carbon black, calcium carbonate, graphite, tire powder, zinc stearate, plant fiber, sepiolite and steel fiber. Using plant fiber and sepiolite to replace asbestos and glass fiber separately can eliminate the harm of asbestos and glass fiber to human health. The friction material has the features of high tensile strength, high toughness, heat resistance, and stable heat decay performance, and may be used in friction wafer for common vehicle and heavy truck.

Description

technical field [0001] The invention relates to the material manufacturing technology of brake friction linings for motor vehicles and mechanical braking control, especially the material manufacturing technology of medium and heavy-duty automobile drum brake friction linings. Background technique [0002] In the traditional friction material manufacturing technology, asbestos is one of the main raw materials used to manufacture automobile brake friction linings, and its content is as high as about 50%. However, asbestos has been recognized as a carcinogen, which is very harmful to human health, and asbestos dust also causes serious pollution to the environment. In addition, asbestos friction materials also have problems such as high hardness, thermal expansion, and thermal decay in terms of performance. Therefore, people began to develop non-asbestos friction materials more than 20 years ago as a substitute for asbestos friction materials. Judging from the current situatio...

Claims

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Application Information

Patent Timeline
26 Nov 2003
Publication
CN1458179A
IPC
C08J5/14
Inventors
宋强; 宋艳