Shanxi butyl inner tube wholesale on the way to improve the vulcanization performance of butyl rubber vulcanizate
Huajun Tire Factory
Shanxi butyl inner tube wholesaleThe use of butyl rubber in natural rubber can improve the air tightness of natural rubber, improve heat resistance and chemical stability, and improve the chemical stability of natural rubber inner tube, and has certain applicability; the use of natural rubber in butyl rubber products can improve the mechanical strength and low temperature elasticity of products, such as tubeless tire inner liner. When butyl rubber is combined with natural rubber with high unsaturation, how should it be solved because the vulcanization speed and vulcanization effect are difficult to meet the requirements?
The vulcanization speed is about 3 times slower than that of natural rubber. To speed up the vulcanization speed, higher temperature is required. However, the heat resistance of the natural rubber itself is poor, and the vulcanization temperature is too high to cause the vulcanization of the rubber, and the molecular chain is broken. Shanxi butyl inner tube wholesale said, on the other hand, due to the fracture of the cross-linking bond, the physical and mechanical properties of the rubber compound are reduced; when the vulcanization temperature rises, the oxygen activity in the natural rubber zsj will increase, causing strong oxidation, causing the natural rubber to rupture and destroy, and the mechanical properties of the rubber are significantly reduced.
For example, natural rubber and butyl rubber are mixed at a ratio of 1:1 and vulcanized at 160 ℃ for 15min to prepare a natural rubber/butyl rubber vulcanizate. The mechanical properties are low and the hardness is high. Generally, it is difficult to meet the requirements of rujiao rubber products. Various indexes of vulcanized rubber are usually difficult to meet the requirements. Long vulcanization time will affect the vulcanization effect. The rubber compound is likely to have the problems of partial scorching or partial sulfur deficiency, for this rubber products manufacturers may wish to choose the method of master batch rubber vulcanization.
A rubber compound prepared by mixing a compounding agent with rubber in a rubber formulation, which is then used as a base for the compound.
Shanxi butyl inner tube wholesale said that in rubber products used in combination with natural rubber and butyl rubber, the rubber factory can first prepare the master batch with natural rubber and natural rubber 2LLY0320-SJ respectively. when the temperature is 135-140 ℃, the reaction time is about 20-25min. the physical and mechanical properties of vulcanized rubber can be significantly improved by reacting butyl rubber and crosslinking agent into semi-coke state in advance and then mixing with natural rubber master batch.
Keywords: recycled rubber automobile cushion belt