The so-called retreading tire is to repair the tire carcass after professionally testing the tire carcass that can be reused, or re-applying the pre-vulcanized tread rubber on the available tire carcass, and recovering after vulcanization. Use value. Recycled rubber is a renewable resource processed from waste rubber products. A large part of it is processed from waste tires. The proper amount can be used in the repair of tire tread rubber to further reduce production costs.
Refit tire tread rubber for formula
70 parts of natural rubber, 30 parts of styrene-butadiene rubber, 20 parts of reclaimed rubber, 2.5 parts of stearic acid, 3 parts of zinc oxide, 1 part of paraffin, 2 parts of anti-aging agent, 7 parts of pine tar, 50 parts of carbon black, 1.5 parts of accelerator 2 parts of sulfur, total: 189 parts.
Renovation tires are the reuse of waste tires. There are some differences between them and the new tires. Therefore, it is necessary to adjust the tread rubber formula of the refurbished tires as much as possible to eliminate the weakness of the refurbished tires.
In the above formula of refurbished tire tread rubber containing reclaimed rubber, rubber manufacturers need to properly control the amount of reclaimed rubber to avoid the excessive amount of reclaimed rubber, which affects the physical and mechanical properties and wear resistance of tread rubber, thereby improving the use of refurbished tires. safety.
From the perspective of the matching system of the tire tread rubber, the reinforcing agent can choose carbon black to further improve the mechanical strength of the tread rubber. The high wear-resistant furnace black can significantly improve the tensile strength and tear strength of the tire tread rubber. Abrasion resistance and aging resistance, especially wear resistance and puncture resistance of tread rubber.
The rubber anti-aging agent delays the aging of the rubber and prolongs the service life of the rubber in the production process of the rubber product. The selection of a suitable type of anti-aging agent in the formula of the tread rubber of the refurbished tire can prolong the use time of the refurbished tire. Among them, anti-aging agent D has obvious protective effect on aging caused by heat, oxygen and flexion, and has certain inhibitory effect on harmful metal ions. It has good dispersibility in rubber compound and does not affect the vulcanization of tread rubber. It can be used as regeneration. The main anti-aging agent in the anti-aging system of the rubber tread rubber anti-aging system; the anti-aging agent A can improve the weathering aging and fatigue aging after improving the tread rubber against the aging caused by heat, oxygen and flexing. Function, can be used as an auxiliary antioxidant.
After adding a certain proportion of reclaimed rubber in the production of retread tire tread rubber, selecting suitable carbon black and anti-aging agent can significantly improve the physical and mechanical properties and aging resistance of tread rubber, prolong the service life of tread rubber; The vulcanizing agent, accelerator and softener in the topping formula also affect the performance of the tread rubber but have little effect, and will not be further described here.