Rubber soles are in direct contact with the ground and require good wear resistance, slip resistance, elasticity, and a certain level of strength to provide us with a comfortable foot feel and good cushioning performance, reducing the impact on the feet during walking; The main materials include natural rubber and synthetic rubber. Processing waste tires into rubber powder is an important way to dispose of waste tires. Many rubber sole manufacturers add tire rubber powder back to rubber sole production. What are the benefits of doing so? What should be noted when adding tire rubber powder to rubber soles?
1. Advantages of using tire rubber powder on rubber soles
(1) From the perspective of production cost, tire rubber powder processed from waste tires as the main raw material has a low price, which can be used in the production of rubber shoe soles to reduce the amount of raw rubber and effectively reduce raw material costs. On the premise of ensuring performance, the dosage of tire rubber powder can even reach over 100 parts.
(2) From the performance point of view, the rubber sole mixed with tire powder can improve the wear resistance, wet skid resistance, aging resistance, etc. of the finished product, and can also improve the processing technology of the rubber sole, which is specifically reflected in the following points:
① Improving wear resistance: The addition of tire rubber powder can enhance the wear resistance of rubber soles, which directly affects the service life and performance of shoes.
② Enhance anti slip performance: Adding tire rubber powder to the rubber sole can improve the grip of the sole in wet environments, thereby effectively improving walking safety.
③ Improve anti-aging performance: tire rubber powder can enhance the anti-aging performance of the sole, giving the rubber sole a better ability to resist the aging caused by environmental factors such as ultraviolet rays, oxidation, etc.
④ Enhancing tensile strength and elongation at break: Reasonable use of tire rubber powder can improve the tensile strength and elongation at break of rubber soles, further enhancing their durability and comfort.
⑤ Improving hardness and rigidity: When producing rubber soles with specific hardness requirements, the reasonable use of tire rubber powder can improve the hardness and rigidity of rubber soles.
⑥ The addition of tire rubber powder can improve the processing technology of rubber shoe soles, increase production efficiency, and reduce production costs.
2. Tips for mixing tire rubber powder with rubber soles
(1) How to determine how much tire rubber powder to use in rubber shoe soles
When adding tire rubber powder to rubber soles, it is necessary to comprehensively consider product performance and cost-effectiveness, based on the required wear resistance, elasticity, flexural flexibility, and other performance requirements of the sole; The addition of tire rubber powder may affect the processing performance of the mixed rubber. The proportion of tire rubber powder added that can ensure the smooth progress of the production process is determined through experiments; Taking into account the manufacturer's cost budget, determine the optimal proportion of tire rubber powder added to rubber shoe soles.
(2) How to improve the comprehensive performance of rubber soles mixed with tire rubber powder
When reducing costs by adding tire rubber powder to rubber soles, adjusting the vulcanization formula appropriately can further improve the comprehensive performance indicators of rubber soles. For example, rubber soles mixed with tire rubber powder can choose a low sulfur and high acceleration formula, which can use accelerators TMTD, accelerator D, accelerator M, and DM in combination; Choose pine tar or Gumaron resin as softeners for the softening system; Add a small amount of paraffin wax as a physical deodorizer and lubricant to help the rubber sole smoothly demold and improve its appearance.
Reasonable use of tire rubber powder in rubber shoe soles can not only reduce production costs and improve the comprehensive performance of rubber shoe soles, but also achieve the recycling of waste rubber resources. If there is an opportunity, the editor will continue to share with you the vulcanization formula and production process points of rubber soles mixed with tire rubber powder.
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