Improving the shrinkage of butyl inner tube and avoiding the problem of butyl inner tube distension can be considered from the following two aspects
relative to the natural glial inner,butyl inner tubeBetter air tightness, longer service life; but in the actual production and use of the process, the shrinkage of butyl tube is lower than the natural rubber tire, when the temperature drops, the belly does not naturally shrink to the normal state, so the butyl tube in the vulcanization is completed, the increasing expansion will cause a burst; improve the shrinkage of butyl tube, especially to reduce the probability of bloating! So what specific method can be used to achieve it?
Generally speaking, to improve the shrinkage of butyl inner tube and avoid the problem of butyl inner tube distension can be considered from the following two aspects:
1. Raw materials
It has good air tightness, heat resistance, ozone resistance, aging resistance, chemical corrosion resistance, and can maintain good service performance in sunlight or ozone environment for a long time, so it is widely used in inner tube production. However, butyl rubber also has some shortcomings, one of which has poor shrinkage performance. Butyl reclaimed rubber is an ideal raw material to replace butyl rubber at present. This product is made of waste butyl inner tube through various processes and has good fluidity, the shrinkage force is small. Due to the dimensional stability of the product, adding an appropriate amount of butyl reclaimed rubber to the butyl rubber inner tube formula can improve the shrinkage of the butyl rubber material and prevent bloating.
2. The production process.
In terms of production technology, there are two main reasons for butyl inner tube swelling. One is that the internal pressure steam socket is blocked, resulting in internal pressure steam not being discharged. The other is that when butyl inner tire rubber is vulcanized, the accumulated water in the internal pressure tube cannot be discharged into the carcass. With the increase of accumulated water in the internal pressure tube, the inner tube swelling is becoming more and more serious. At this time, the internal pressure steam socket can be dredged and checked and cleaned regularly, or a diversion pipe and a drain device can be added under the steam main pipe to ensure that the external pressure return steam pipe can ensure that the internal pressure pipe accumulates water, so as to avoid the accumulation of water into the inner tube and the inner tube flatulence problem.
Replacing part of butyl reclaimed rubber with butyl rubber can improve the shrinkage of butyl inner tube compound, thereby improving the shrinkage of butyl inner tube compound. It can also reduce the production cost of a certain proportion, which can be said to do more with one stone. When using butyl rubber and butyl reclaimed rubber at the same time, it is not only necessary to choose butyl reclaimed rubber with high fineness and no impurities, but also pay attention to the production process to prevent water vapor or water vapor in the butyl inner tube, to prevent the inner tube of the product from swelling and even causing explosion.
Keywords: recycled rubber automobile cushion belt