Butyl rubber inner tubes have excellent air tightness, heat resistance, and aging resistance, which can maintain tire pressure for a long time and reduce the number of inflation cycles; At the same time, it can be used in high temperature environments without being easily damaged, and can resist long-term ultraviolet radiation without aging. Therefore, butyl rubber is currently the most common raw material for the production of inner tubes on the market. Butyl reclaimed rubber is processed from waste butyl inner tubes, which retains the basic performance characteristics of butyl rubber. Can it replace some of the original butyl rubber to produce rubber inner tubes?
From the aspects of airtightness, heat resistance, and aging resistance, butyl rubber is indeed an ideal raw material for producing rubber inner tubes. However, in actual production, butyl rubber also has certain defects: slow vulcanization speed, poor self adhesiveness and mutual adhesiveness, poor compatibility with other rubbers, poor processing performance, high dynamic heat generation, and high cost. Adding an appropriate amount of butyl reclaimed rubber to the formula of butyl rubber inner tubes can not only reduce costs and ensure good airtightness of butyl inner tubes, but also improve the processing performance of butyl rubber to a certain extent.
From a price perspective, the price of butyl reclaimed rubber is much lower than that of butyl rubber. Using a certain proportion of butyl reclaimed rubber instead of butyl rubber can reduce some production costs; Reasonably determine the blending ratio of butyl reclaimed rubber in butyl rubber inner tubes to ensure a balance and the performance and cost-effectiveness of the inner tubes.
From the perspective of physical and mechanical properties, butyl reclaimed rubber has excellent airtightness. Replacing some butyl rubber in the production of inner tubes can not only reduce raw material costs, but also meet the low breathability requirements of rubber inner tubes for rubber materials; Butyl reclaimed rubber also has good heat resistance, aging resistance, etc.
From the perspective of processing performance, butyl reclaimed rubber has good plasticity, low power consumption during mixing, good compatibility with butyl rubber and compounding agents, low heat generation during heating, and can act as a lubricant and improve rubber flowability. The above advantages of butyl reclaimed rubber can precisely compensate for the defects of poor processing performance, good compatibility with other rubbers, and high dynamic heat generation of butyl rubber, effectively improving the production process of butyl rubber inner tubes. Therefore, blending butyl reclaimed rubber into butyl rubber inner tubes is a good choice.
Reference formula for producing rubber inner tubes using a combination of butyl rubber and butyl reclaimed rubber: 100 parts of butyl rubber, 40 parts of butyl reclaimed rubber, 5 parts of zinc oxide, 1 part of stearic acid, 30 parts of carbon black N550, 25 parts of carbon black N774, 3 parts of engine oil, 0.5 parts of accelerator DM, 1 part of accelerator TMTD, and 1.75 parts of sulfur; A total of 207.25 copies. The recommended vulcanization condition is 143 ℃ for 40 minutes.
In actual production, butyl reclaimed rubber can be used alone or in combination with butyl rubber, natural rubber, etc. to produce rubber inner tubes, effectively reducing raw material costs, such as bicycle inner tubes, motorcycle inner tubes, car inner tubes, etc. When using butyl rubber/butyl reclaimed rubber to produce rubber inner tubes, it is necessary to choose butyl reclaimed rubber with stable quality that meets the requirements of inner tube production. The proportion of butyl reclaimed rubber should be reasonably determined, and the vulcanization formula should be adjusted appropriately, especially the vulcanization system and reinforcement filling system. The editor will continue to discuss relevant issues with you in the future.
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