Rubber powder is a powder material made of waste rubber products (mainly waste tires) as raw materials, through room temperature crushing method, freezing method or mechanical crushing process, according to the fineness can be divided into coarse rubber powder, fine rubber powder, fine rubber powder, fine rubber powder, fine rubber powder, etc., of which the fineness of fine rubber powder is among 60-80 mesh, which can be directly mixed into the tire tread rubber to improve the static performance and fatigue resistance of the tire and other dynamic properties, the higher the fineness of the rubber powder, the greater the performance improvement.
1. The role of fine rubber powder in automobile tire tread rubber
Tire tread rubber is the part of the outer tire that is in direct contact with the ground, which needs to withstand friction and puncture, weaken the impact and vibration from the road surface, conduct the traction and braking force of the wheel, and require the rubber to have excellent wear resistance, impact resistance, cutting resistance and heat resistance. About 10 parts of fine rubber powder are mixed into the tire tread rubber formulation, and the dynamic performance, process performance and aging resistance are improved.
2. Application of fine rubber powder in different vehicle tire tread rubber
(1) Light truck tire tread rubber: 10-15 parts of 60-80 mesh fine rubber powder can not only improve the dynamic performance and process performance of tire tread rubber, but also reduce the lag loss of tire driving and improve the service life of tires.
(2) Bias tire tread rubber: about 15 parts of fine tire mixed rubber powder are mixed with bias tire tread rubber, and the comprehensive performance of vulcanized rubber is close to that of the rubber without rubber powder, and the vulcanization speed has increased, reducing the cost of rubber compound.
3. The effect of rubber powder fineness on the performance of tire tread rubber
The fineness of rubber powder directly affects the tire tread rubber, the finer the rubber powder, the better the tensile performance, compression heat generation, wear resistance, tear resistance and flexural resistance, and the closer the tensile strength, elongation and abrasion properties of the E5LYY227, elongation and abrasion are to those without glue powder; The high-fineness rubber powder is easier to disperse in the tire tread rubber; The fineness of the rubber powder also affects the performance of the tread rubber vulcanized rubber, and also affects the vulcanization process, including the scorch time and positive vulcanization time.
The fineness of the rubber powder plays an important role in improving the performance of the tread compound. By selecting the appropriate fineness of rubber powder, the mechanical properties, processing performance and service life of tires can be effectively improved.
4. Vulcanization formula of tire tread rubber mixed with fine rubber powder
70 parts of natural rubber, 20 parts of styrene-butadiene rubber, 10 parts of tire reclaimed rubber, 10 parts of fine rubber powder, 5 parts of zinc oxide, 3 parts of stearic acid, 1 part of antioxidant 4010, 1 part of antioxidant RD, 0.4 parts of antioxidant H, 1.2 parts of paraffin, 20 parts of carbon black N220, 20 parts of carbon black N330, 4 parts of pine tar, 0.5 parts of accelerator CZ, 0.6 parts of accelerator DM, 2.3 parts of sulfur; A total of 169 copies.
The use of fine rubber powder in tire tread compound can not only reduce costs, but also optimize the production process and improve the performance of the finished tire. In actual production, fine rubber powder can also be used in the production of hoses, tapes, rubber soles, sealing products, building waterproof materials and other products, and can also be used for rubber and plastic modification, and related issues will be discussed with you later.
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