The Relationship Between tTme and Temperature of The Vulcanization and Accelerator
Industrial products production often seek is the lowest temperature, the shortest time sulfide. When think vulcanization time is too long, often is to increase the accelerator, or improve the curing temperature, but the actual such procedure is wrong.
1. Because the temperature in the rubber vulcanization decision varieties, such as the best natural rubber vulcanization temperature for 145-148 degrees, butyl benzene, butyl rubber, butadiene rubber so the best curing temperature for 148-153 degrees, silicone rubber vulcanization temperature for 170-175 degrees. In the practical operation do temperature adjustment in the temperature of filter based general add 3-5 degrees or so. Curing temperature setting is should not change. If change will affect the physical rubber. At the same time in the process of production will appear such problems.
2. The time is set to sulfide ju products of the thickness and operation requirements to set. Because the thermal conductivity of the rubber is bad. The thicker products the longer sulfide. The setting of the time acquired sulfide filter different products and set different curing time. Thin products fluidization time is too long to productivity and a waste of energy. Time is too short thick products sulfide, outside the coke not familiar the serious influence quality.
3. In order to improve the speed of sulfide generally there are two ways first is heating, again a is to increase promote agent or convert super ultra accelerators, such as heating to property of the product is not high demand can take an examination of the filter. But it is difficult to control. According to the theoretical calculation because every improve 10 degrees vulcanization time about shorten time less than half. Such as improving temperature should also calculate how much should be improved by such temperature. Increase or decrease in promoting agents to adjust the fluidization velocity is a common method, it must be in the set temperature and time, and then increase or decrease to adjust the accelerator.