In the production of rubber products, the use of natural rubber and reclaimed rubber can reduce the cost of raw materials, improve the processing technology and improve the comprehensive performance of rubber products. The high price of natural rubber and the low price of reclaimed rubber can reduce the cost. , Elongation at break, regenerated rubber anti-aging, good flex resistance performance, both can significantly improve the use of rubber products performance, extend the service life. In other words, the combination of reclaimed rubber and natural rubber is of great importance both in cost and in performance. But all of the reclaimed rubber can be used with natural rubber?
First of all, let's look at the types of reclaimed rubber: the reclaimed rubber commonly used in the market is latex reclaimed rubber, tire reclaimed rubber, butyl reclaimed rubber, butyronitrile reclaimed rubber and EPDM reclaimed rubber, of which the reclaimed rubber is the lowest in price and the largest in quantity , Latex reclaimed rubber is the closest product to natural rubber. Butyl reclaimed rubber, nitrile reclaimed rubber and EPDM reclaimed rubber are usually used to produce rubber products with special performance requirements. The above five common reclaimed rubber materials and performance are quite different, use "each has its advantages"; precisely because of their different raw materials, so the internal structure of the molecules vary greatly, not all products can be used in combination with natural rubber.
Latex reclaimed rubber raw materials mostly waste natural rubber, waste natural rubber products, waste latex products, in the production process to retain most of the original natural rubber molecules internal structure, with the same natural rubber and high elasticity, strong stretch and other advantages In addition, the compatibility of natural rubber is also the best; from another perspective, latex reclaimed rubber "source" is natural rubber, and "source" and natural use of natural water.
Tire reclaimed rubber raw materials is scrap tires, and tires on the market more use of natural rubber + synthetic rubber (such as styrene butadiene rubber) + carbon black, so the reclaimed rubber not only natural rubber has good compatibility, but also with the small Benzene rubber, isoprene rubber and use. Good natural rubber elasticity, high content of plastic, but the wear resistance, aging resistance is poor, tire reclaimed rubber small proportion of wear-resistant but prone to flexor crack, and they complement each other to improve the overall performance of rubber products, such as tires Tread and natural rubber regeneration with the production of wear-resistant plastic sheet.
In addition, the natural rubber can also be used with high-density butyl rubber regeneration, significantly improve the rubber compound aging resistance, heat resistance and air tightness; a small amount of natural rubber can also be used with nitrile rubber regeneration can increase Thickening, to improve the performance of nitrile rubber reclaimed products, but the amount can not exceed 15%, otherwise it will reduce the oil resistance of nitrile reclaimed rubber; but here need to pay attention to is that natural rubber can not be used together with EPDM reclaimed rubber.
There are a variety of specifications on the market of natural rubber, such as Vietnam 3L, Yunnan, a standard and Thailand on the 3rd smoke sheet plastic, etc. These natural rubber high purity, good elasticity, but the price is high and volatile, so Many manufacturers of molded natural rubber products use floor natural rubber, high product index, low price, can significantly reduce the cost of raw materials.
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