Waste natural rubber, waste latex and its products processed natural latex recycled rubber, with good elasticity, high tensile strength, high tear elongation, small specific gravity, no odor, etc., can replace natural rubber in whole or part to produce various rubber products, reduce the cost of raw materials, sports soles are one of them. What are the benefits of rubber sneaker soles mixed with latex recycled rubber? What issues should be paid attention to in the production of sports soles with latex recycled rubber?
1. The advantage of using latex recycled rubber for rubber sports soles
(1) Latex recycled rubber reduces the production cost of rubber sports soles
The price of latex recycled rubber is much lower than that of natural rubber and synthetic rubber, and the production of rubber sports soles by replacing natural rubber with a certain proportion can effectively reduce the cost of raw materials.
(2) Latex recycled rubber improves the performance of rubber sports soles
Natural latex recycled rubber retains the high elasticity of natural rubber and can quickly rebound when pressed, making the sneaker sole have good shock absorption, good flexibility, and comfortable wearing. Compared with natural rubber, latex recycled rubber has better aging resistance and is used in the production of rubber sports soles to improve the durability of the sole.
(3) Latex recycled rubber improves the processing technology of rubber sports soles
Compared with natural rubber, latex recycled rubber has high plasticity, good fluidity, low power consumption, small vulcanization and low expansion and shrinkage rate. The production of rubber sports soles with natural rubber, styrene-butadiene rubber or butadiene rubber can improve the compounding and vulcanization process of rubber materials, help reduce production energy consumption, improve the stability of rubber sole size and shape, and reduce the tendency of natural rubber to vulcanize and revert.
2. Tips for producing rubber sports soles from latex recycled rubber
(1) Option skills for latex recycled rubber for rubber sports soles
When using latex recycled rubber to reduce the production cost of rubber sports soles, it is recommended to choose environmentally friendly latex recycled rubber and odorless natural recycled rubber with high glue content, high fineness, and no impurities; white and light-colored sports soles are made of white latex recycled rubber, which is easy to color match; Black sneaker soles are made of black latex recycled rubber, which is cheaper.
(2) Latex recycled rubber production rubber sports sole formula design
It is generally not recommended to use latex recycled rubber completely, and can be used with natural rubber, butadiene rubber or styrene-butadiene rubber. The use of high-wear-resistant carbon black reinforcement E5LYY930, and the use of silica for light-colored soles can also improve the tear resistance and anti-slip properties of the sole; appropriately increase the dosage of vulcanizing agents and accelerators (10%-20%); Appropriately reduce the amount of softeners (such as naphthenic oil) to improve the fluidity of rubber processing and avoid reducing the wear resistance of sports soles.
(3) Latex recycled rubber production rubber sports sole processing technology
(1) Latex recycled rubber can be thinned before use to make the texture more uniform; (2) The two-stage mixing method is adopted: after the first stage of raw rubber plasticization is sufficient, the latex regenerated rubber and most of the fillers are added, and the second stage is added with vulcanizing agents, accelerators and other small materials to prevent scorching; (3) Adjust the vulcanization time and vulcanization pressure to ensure that the rubber sports sole is well shaped.
In actual production, latex recycled rubber is an ideal raw material for the production of rubber sports soles instead of natural rubber. Reasonably determine the mixing ratio of latex recycled glue, appropriately adjust the rubber formula and production process parameters, under the premise of ensuring the performance of sports soles,further reduce raw material costs.
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