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Relationship between the curing time, temperature, between accelerator
2015-05-12 Reads : 23
1. Because the curing temperature depends on the variety of rubber, such as natural rubber optimum cure temperature of 145-148 degrees, styrene-butadiene, acrylonitrile-butadiene rubber, butadiene rubber optimum cure temperature of 148-153 degrees, the silicone rubber good curing temperature of 170-175 degrees. In actual operation should consider adjusting the temperature difference between the temperature at the base generally add about 3-5 degrees. When the curing temperature settings should not change. Such changes will certainly affect the physical properties of the rubber. At the same time there will be this kind of problems in the production process. 2. The curing time is set according to the thickness of products and operational requirements set. Because the thermal conductivity of rubber is poor. Products thicker and longer curing time. Curing time should be set to take into account different products and different set cure time. Vulcanization time too thin is a waste of productivity and energy. Thick vulcanization time is too long, outer Giori unfamiliar seriously affect the quality. 3. In order to improve the cure rate generally two ways first is heated, and then one is to increase the dosage or switching to promote speeding promoting agent, such as heating of the material less demanding products can be considered. But it is difficult to control. Because according to theoretical calculations by 10 degrees to shorten the curing time is about less than half the time. Such as how much temperature increase the temperature should be in such projections should be improved. Vulcanization accelerators to increase or decrease the speed of adjustment is a common method, it must be set up after the temperature and time, and then to adjust the increase or decrease in accelerant. Adjust the accelerator is a luxurious, because the solubility enhancers and sulfur in the rubber is very small. When it exceeds its solubility it will come out, there blooming. And physical properties have changed a lot. Practice has proved that. Ordinary product dosage should promote better. Modified accelerator should not proportionally, it should increase or decrease the second. Third accelerator, to improve the activity properties. So that it can effectively control the accelerator blooming problem, which does not affect the physical properties and stability. Usually manufacturers are increasing the number of operations from mold operator to consider. Blindly increasing accelerator, raising the temperature to increase production have the following hazards.
keywords: Vulcanization accelerators, vulcanization temperature,
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Copyright © GuangDong ICP No. 10089450, New Material Technology Co., Ltd. Guangdong Durbar All rights reserved.
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You are the 30988 visitor
Copyright © GuangDong ICP No. 10089450, New Material Technology Co., Ltd. Guangdong Durbar All rights reserved.
Technical support: ShenZhen AllWays Technology Development Co., Ltd.
AllSources Network's Disclaimer: The legitimacy of the enterprise information does not undertake any guarantee responsibility