The reclaimed butyl rubber made from waste butyl inner tube retains the basic properties of butyl rubber, with good air tightness, heat resistance and chemical resistance. It can be used alone or in combination with butyl rubber to produce rubber products, effectively reducing the cost of raw materials. When producing rubber products with butyl rubber/butyl reclaimed rubber blend, the amount of butyl reclaimed rubber directly affects the mechanical properties, Mooney viscosity and vulcanization properties of IIR blend.
1. effect of reclaimed butyl rubber content on mechanical properties of IIR blend
In the butyl rubber/butyl reclaimed rubber blend, with the increase of the amount of butyl reclaimed rubber (0-20 phr of butyl reclaimed rubber), the tensile strength of the blend decreased first and then increased slightly, while the elongation at break decreased first and then increased. The 100% constant tensile stress and 300% constant tensile stress decreased gradually with the increase of the amount of butyl reclaimed rubber, and the tear strength showed an overall upward trend.
The mechanical properties of the finished product will not change much when butyl reclaimed rubber is added in butyl rubber products. The addition of butyl reclaimed rubber can also improve the tear properties of the compound to a certain extent.
2. effect of butyl reclaimed rubber dosage on Mooney viscosity of IIR blend
Mooney viscosity is an important index to measure the processing performance of rubber, reflecting the fluidity and plasticity of rubber. When butyl rubber and butyl reclaimed rubber were used together, the Mooney viscosity of IIR blend gradually decreased with the increase of the amount of butyl reclaimed rubber (0-20 phr of butyl reclaimed rubber). In the butyl rubber/butyl reclaimed rubber blend, butyl reclaimed rubber can play the role of lubricant and improve the rubber fluidity. IIR blend is easier to mix and extrude in the processing process.
3. effect of butyl reclaimed rubber content on vulcanization properties of IIR blend
The results showed that the scorch time of butyl rubber/butyl reclaimed rubber blends increased at first and then decreased slightly with the increase of butyl rubber content (0-20 phr of butyl reclaimed rubber), and the positive vulcanization time increased at first and then fluctuated slightly after e5lyy425; Proper use of butyl reclaimed rubber in butyl rubber can extend the scorch time and positive vulcanization time to a certain extent, providing more sufficient operation time for rubber processing. Generally, when the amount of butyl reclaimed rubber is about 10 phr, the vulcanization performance of IIR blend is better.
Adding butyl reclaimed rubber in the formula of rubber products with butyl rubber as the main raw material can not only reduce the cost of raw materials, but also improve the processing performance of rubber and the comprehensive indicators of finished products. I will continue to share with you the specific mixing skills and practical formula of butyl reclaimed rubber in butyl rubber products later.
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