Automobile tyres are generally composed of outer tube, inner tube and cushion belt (except tubeless tyres), and the outer tube is the main body of tyres; The outer tire also includes the tire body, tread and bead; Different parts of the automobile tire have different requirements for the performance of the rubber compound, and the variety and proportion of the rubber raw materials used are different. The recycled tire rubber is processed from waste tires and can be reused in the manufacturing of automobile tires to improve the technological performance of the rubber and reduce the production cost.
1. Application skills of recycled tire rubber in automobile tire casing
The outer tire of automobile tire includes tire body, tread, sidewall and bead. The carcass of an automobile tire is composed of a cord layer and a buffer layer, mainly for the purpose of mitigating vibration and impact; The tire tread compound shall have good elasticity, wear resistance, cutting resistance and cushioning performance; The sidewall rubber of the tire shall have good flexion resistance and aging resistance to ensure that the tire body is not subject to mechanical damage; The tire bead needs to bear various interactions among the outer tire and the tire.
Most parts of the tire outer tube are processed with natural rubber, styrene-butadiene rubber, cis-1,4-polybutadiene rubber or their blends as raw materials. Add proper amount of recycled tire rubber to reduce the cost of raw materials. In actual production, 5-20 parts of high strength tire tread reclaimed rubber and fine particle tire reclaimed rubber can be mixed in the tread rubber of automobile tires; The amount of reclaimed rubber 2SLYY37 in the sidewall compound of bias light truck tire is about 30 phr, and the amount of reclaimed rubber in the sidewall compound of car radial tire is generally controlled among 5-10 phr; About 10-50 parts of recycled tire compound can be mixed in the carcass ply compound of automobile tire; A large amount of recycled tire rubber can be mixed in the bead rubber, and the amount is among 100-200 parts.
2. Application skills of recycled rubber in inner tube of automobile tire
The inner tube of automobile tire is a circular elastic tube with a tire valve to maintain the inner pressure of the tire. It is required to have excellent air tightness, good elasticity, tear resistance and fatigue resistance. The traditional automobile inner tube is processed with natural rubber as the main raw material, and then replaced by more butyl rubber inner tubes. In actual production, a small amount of ultra-fine tire recycled rubber can be added into the inner tube of the automobile, which can improve the technological performance of the rubber and reduce the cost of raw rubber while ensuring the air tightness of the inner tube.
3. Application skills of recycled tire rubber in automobile tire pad
The tire pad belt in the automobile is a solid annular tape installed among the inner tube and the rim, which is mainly used to protect the inner tube from the wear of the rim or being pinched by the rim and the outer tire bead; The edge of the cushion belt is thin and the surface is smooth; The rubber compound is required to have good heat aging resistance, but the physical and mechanical properties of the rubber compound are not required to be high. It is generally processed with natural rubber, natural rubber/styrene butadiene rubber, natural rubber/cis-1,4-polybutadiene rubber as the main raw materials; Regenerated tire rubber can replace part of the original rubber to produce automobile tire cushion belt and reduce the cost.
The reclaimed tread rubber has high strength and good elasticity, and can be used in the production of tire cushion belt; 150-230 parts of tread reclaimed rubber can be added to 100 parts of raw rubber (total amount of natural rubber, styrene-butadiene rubber and cis-1,4-polybutadiene rubber). Proper increase of the amount of reclaimed rubber will not cause the mechanical strength of the backing rubber to decline.
The usage and dosage of recycled tire rubber are different in different parts of different types of automobile tires. Later, the editor will continue to share with you the formula of tread rubber, sidewall rubber, bead rubber, inner tube rubber and cushion belt rubber of automobile tires mixed with recycled tire rubber.
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