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Precipitated Silica Applied in Tire Industry
Jul 12, 2018

                             Precipitated Silica(Silicon Dioxide/SiO2) Applied in Tire Industry




Since the industrial production of 1940s, the white carbon black products have been widely used in all walks of life since the industrial production of more than 60 years. Besides being widely useas reinforcing agents in rubber products, it can also be used in the pharmaceutical industry, pesticide, ink, paint, paint, toothpaste, paper, food, feed, cosmetics, and cosmetics. Battery and other industries. This paper briefly introduces the main application industries of white black and black.What's the appliction of silica used in tire industry?

White carbon black was originally used as decorative adhesive strip for white tire side car tyres, and its use was gradually expanded. It has been used in various components of tires. Generally speaking, if the lag loss of tread rubber is reduced, the wet grip will also decrease. However, the use of white carbon black in tire tread, especially high dispersion precipitation method white carbon black and coupling agent, can simultaneously improve the tire life (improve wear resistance) and safety (improve anti slippery), reduce fuel consumption (reducing rolling resistance), so many foreign tire manufacturers are now more in the tread and used high. Dispersive silica can effectively improve the tire performance. In addition, the precipitated silica can be used in the tire carcass and the belt layer to improve the adhesive force between the rubber and the wire cord (such as the inter white system). The replacement of carbon black with the carbon black part in the tire side rubber can greatly improve the durability of the rubber, improve the flexural resistance and impact resistance, and use the tyres for cars and heavy tires. It can maintain the dimensional stability of the compound and improve its ability to resist mechanical damage.

(1) tread

The tread is the part of the contact between the tire and the pavement. Therefore, three basic requirements are put forward: one is to have a high grip of the wet pavement or better traction to ensure the safety of the vehicle and the personnel; two, the rolling resistance is small, so as to save fuel. Generally speaking, the rolling resistance of the tire decreases by 3-4% and the fuel consumption can be reduced by 1%. Based on the rolling resistance of tread is about 50% of the tire, rolling resistance during the reduction period is an important way to save fuel. The three is wear resistance and long service life.

A, tires tread

It has been found that the highly dispersed white carbon black and special solution polymer and silane coupling agent are used, and the best mixing process can overcome the defects of the lag loss of the tread rubber and the decrease of the wet grip. The tread with completely white carbon black as a filler can reduce the tire rolling resistance by 20%, which means that the loss of the tread lag is reduced by about 50% and the fuel consumption is reduced by at least 30%.

At present, the amount of precipitated silica in the tread of passenger tires is generally 65.

B, tread surface

White carbon black for heavy-duty tyres is designed to improve the puncture resistance and tear resistance of tread. Precipitated silica is especially suitable for tread because it can not only reduce rolling resistance, but also drive low temperature. For truck tyres, low or low temperature is extremely important.

C, cross-country tire tread

The purpose of using precipitated silica for cross-country tire treads is to reduce the heat generation, improve the heat resistance and the ability to resist the disintegration of the block. Compared with the pure carbon black filled tread with the precipitated carbon black, the growth and tearing strength of the former is much higher than that of the latter, and the high dispersion precipitation is all used. Natural rubber construction machinery tire tread of white carbon black can obtain low heat generation, better tear resistance and fatigue resistance and tear effect of pattern blocks.

(2) fetal side

The tire side is a layer of outer rubber to protect the body from the climate erosion. It should have good durability, anti oxygen aging, wear resistance, tear resistance, circumferential and radial crack, long fatigue life and so on. For this reason, natural rubber / polybutadiene rubber and some rubber compound containing antioxidant, ozone inhibitor and paraffin wax are commonly used on the tire side. However, when the antiozone is exhausted, the side of the tire will be hardened and cracked, and the anti ozone and paraffin resistance will make it fade and the ozone resistance is polluted. At this time, if the precipitated silica is used, the above phenomena can be obviously weakened.

(3) bonding of wire cord

Precipitated silica is widely used in wire thread bonding. It can be used not only with resorcinol formaldehyde tread and used to form RFS adhesive system, but also to increase the adhesion of plated steel wire with rubber. It also can be used with organic drilling salt and used to form white carbon black / cobalt and white carbon black / resin / cobalt adhesive system. These two bonding systems are hot. The adhesion of moisture and brine before and after aging increased with the increase of silica content.

Overall, silica powder has become more and more widely used in tires, and the various tires represented by "green tires" are becoming more and more popular with white carbon black. Therefore, the development of improved white carbon black will be an important part of the development of the tires.