Apocynum venetum fiber doped high environmentally-friendly type ceramic saloon car brake pad and preparation method thereof

Abstract

The invention relates to a ceramic saloon car brake pad which comprises the following ingredient components: modified phenolic resin, ceramic fiber, gelatin-spraying aluminum silicate fiber, aramid fiber, apocynum venetum fiber, red copper fiber, graphite, potassium hexatitanate whisker and BaSO4, wherein before being used, apocynum venetum needs to be subjected to modification as follows: the apocynum venetum fiber soaked by water is put in a NaOH solution for alkali treatment, then the apocynum venetum fiber subjected to alkali treatment is put in a high-pressure container for pressure maintaining treatment, and finally, fire retardant treatment is carried out on the surface of the apocynum venetum fiber. The invention also provides a preparation method of the ceramic saloon car brake pad. The apocynum venetum fiber doped saloon car brake pad has the advantages of stable frictional factor, high temperature resistance, small antithesis abrasion, good abrasive resistance and corrosionresistance, small heat-fading property, small noise, good comfortableness, environmental friendliness, thereby being an ideal substitute material of an asbestos-free organic based brake pad.

Description

technical field [0001] The invention relates to a ceramic car brake pad, in particular to a highly environment-friendly ceramic car brake pad mixed with apocynum fiber and a preparation method thereof. Background technique [0002] With the development of the economy, the penetration rate of cars is getting higher and higher. As a main means of transportation, cars have always brought people a lot of convenience. While bringing convenience to people, we have to be vigilant against traffic accidents. The harm we bring, at least 20% of traffic accidents every year are caused by the failure of brake pads, which has to make us pay more attention to the quality of brake pads. When the car is braking continuously or in an emergency, a lot of heat will be generated due to friction, making the temperature of the brake pads as high as 600°C or even higher, which puts forward higher requirements for the brake pads. [0003] Asbestos brake pads are the first generation of automobile b...

AI Technical Summary

Problems solved by technology

[0003] Asbestos brake pads are the first generation of automobile brake pads. Asbestos fibers are mainly used as friction materials, but this material is not an environmentally friendly friction material. The medical community has found that asbestos materials are a carcinogen. Every time you brake, there will be hundreds of Tens of thousands of asbestos fibers are released into the air, asbestos fibers float in the air, enter the lungs with breathing, and deposit in the lungs, which may eventually lead to lung cancer, which poses a great threat to people's lives. On the other hand, asbestos fibers have poor thermal conductivity, and the brake pads heat up quickly, which will lead to changes in the performance of the brake pads. At the same time, the phenomenon of "brake shrinkage" will appear. When a certain temperature is reached, the brakes will fail.

[0004] Semi-metallic brake pads are the second generation of automobile brake pads after asbestos brake pads. Rough steel fibers are mainly used as friction materials. Compared with asbestos brake pads, semi-metallic brake pads have improved a lot, but there are still many problems. In the low temperature environment, the friction increases, the wear of the brake pads to the pair is intensified, and noise will be generated at the same time

Due to the good thermal conductivity of metal materials, the heat generated by the brake pads during the braking process will be quickly transferred to the brake calipers, piston seals and other parts, which will accelerate the aging of the parts and make the brake fluid in the brake pipeline The temperature rises, even boiling, which seriously affects the safety of braking. The brake pads are always exposed to the air and will be exposed to different driving environments. Metal materials are easily corroded and rusted

[0005] Asbestos-free organic-based brake pads are the third generation of automotive brake pads, mainly using hybrid fibers (glass fiber, carbon fiber, steel fiber, silicate fiber, ceramic fiber, etc.) It has surpassed the asbestos fiber brake pads, and the wear on the pair is small during use, but since the asbestos-free organic-based brake pads use resin as a binder, the high temperature generated during long-term continuous braking or emergency braking will make the The thermal decomposition of the resin reduces the bonding effect and aggravates the wear and tear, resulting in a reduction in the service life of the brake pads. When braking at high speed, the wheels are easy to vibrate, and even brake failure occurs.

Since the 1990s in our country, cellulose fibers have been used in friction materials, but at that time all equipment and raw materials were imported from abroad, which were expensive