The rubber powder processed from waste rubber can be directly used in various rubber and non-rubber fields to realize the regeneration and recycling of waste resources. In actual production, adding an appropriate amount of rubber powder to the tire retreading industry can not only reduce the cost of retreaded tires, but also process part of the waste rubber. When using rubber powder in retreaded tires, rubber product manufacturers need to reasonably control the amount of rubber powder and appropriately adjust the formula of retreaded tires containing rubber powder.
1. The basic reference formula for retreaded tires mixed with a small amount of rubber powder
Natural rubber 40 parts, butadiene rubber 40 parts, styrene butadiene rubber 30 parts, carbon black 70 parts, activator 5.5 parts, anti-aging agent 3.5 parts, sulfur 1.8 parts, accelerator 1.8 parts, rubber powder 10 parts.
2. Factors affecting the mixing effect of rubber powder in retreaded tires
When mixing rubber powder in the retread tire formula, the amount of rubber powder, the type of rubber powder, the fineness of the rubber powder, the method of crushing the rubber powder and whether the rubber powder contains impurities (impurities in the rubber powder mainly include fiber, metal, dust and moisture Etc.) will affect the mixing effect of rubber powder in retreaded tires, and ultimately affect the physical and mechanical properties of the retreaded tire 2YLYY310. For example, the high-fineness, small-particle size tire rubber powder processed from waste tires of more than 900 has a relatively better blending effect in retreaded tires.
3. Different amounts of rubber powder affect the mechanical properties of retreaded tires
In actual production, retreaded tires that use a small amount of rubber powder have good puncture resistance, aging resistance, tear resistance, abrasion resistance, etc., and retread tires have a longer mileage. Excessive amount of rubber powder can easily cause cracks and cracks in the rubber compound to increase rapidly, deterioration of aging resistance and abrasion resistance, and damage the performance of retreaded tires; generally, the amount of rubber powder in retreaded tires can be controlled between 10-20 parts . Under the premise of the same amount of rubber powder, the smaller the particle size of the rubber powder, the better the comprehensive indicators of retreaded tires.
4. Methods to improve the mixing effect of rubber powder in retreaded tires
To improve the mixing effect of rubber powder in retreaded tires, a small amount of activator such as silane coupling agent, rubber powder peptizer can be added to the retreaded tire formula, or sulfur and accelerator NOBS can be used together at a ratio of 1:1 to increase The surface activity of the rubber powder can improve the mixing effect of the rubber powder in the retreaded tire, and finally achieve the purpose of adding more rubber powder under the premise of ensuring the performance of the retreaded tire.
When using rubber powder in retreaded tires to further reduce processing costs, you must choose the right rubber powder, reasonably control the amount of rubber powder, and use activated rubber powder if necessary. I have the opportunity to continue discussing with you.
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