Tire reclaimed rubber production is the largest proportion of total reclaimed rubber varieties, while Mooney viscosity is an important indicator of rubber production of reclaimed rubber. Mooney viscosity levels will affect the ease of rubber compounding, product extrusion heat level, semi-finished product dimensional stability, rubber vulcanization fluidity. Tire reclaimed rubber Mooney viscosity fluctuations too large to the rubber products business process operations have brought great difficulties, and even affect the normal production.
In our country, the method of desulfurization of reclaimed rubber is still mainly based on dynamic desulfurization method. Although the dynamic desulfurization method produces reclaimed rubber in our country for more than 20 years, the technology tends to mature and the quality of products is relatively stable. However, Mooney viscosity instability is often a problem. The use of dynamic desulfurization of tire reclaimed rubber production when Mooney viscosity instability occurs mainly due to the following points:
1, activator quality fluctuations
At present, China's production of tire reclaimed rubber, mostly polyalkyl phenol disulfide as an activator, its main raw material is the antioxidant side materials, the quality of their instability, the activation of the production process will appear fluctuations in the conditions , So the activator product quality is not stable, such as varying the level of activity with different levels of sulfur. If the activator product is quite different, the Mooney viscosity of the reclaimed rubber will be seriously affected, and the Mooney viscosity will naturally fluctuate.
2, dynamic desulfurization tank exhaust valve leak
When the tire reclaimed rubber products in the production process of raw materials, processes, formulas, etc. did not change words, the Mooney viscosity changes may be dynamic desulfurization tank exhaust valve leakage. Usually regenerated rubber factory desulfurization gas discharge pipe and heat exchanger necklace, or with exhaust gas treatment purification device connected together, so the desulfurization tank vent valve minor leaks should not be found, which will result in a sudden increase in Mooney viscosity; therefore Dynamic desulfurization tank production of recycled rubber must always check the equipment is normal, both to ensure that the quality of tire rubber regeneration, but also to improve production safety.
3, pressure gauge error effects
As dynamic desulfurization tank pressure gauge using the environment is poor, there will be slight vibration of the desulfurization tank, the pressure gauge in the use of pressure display after some time there will be a greater error, and the pressure gauge error will often result in reclaimed rubber tire Mooney viscosity Appear larger fluctuations.
4, softener water changes
Softener is an important assistant in the desulfurization process of reclaimed rubber. However, common softener products like coal tar, tall oil and so on contain a certain amount of water. During storage, water increases and the amount of oil decreases. Which will cause the Mooney viscosity increase in the process of tire reclaimed rubber production. For example, low-moisture solid coal tar at about 5%, high when it will reach 15-20%, will result in greater volatility Mooney viscosity.
With the continuous development of reclaimed rubber technology and the continuous improvement of the quality of reclaimed rubber in the country, the current process of producing reclaimed rubber with high-pressure dynamic desulfurization tank has gradually been eliminated and the country has banned the addition of coal tar in the reclaimed rubber production process. Therefore, the reclaimed rubber Mooney viscosity more and more stable, reclaimed rubber odor is getting smaller and smaller.
Rubber products factory in the selection of tire reclaimed rubber, we must from reclaimed rubber manufacturers tire reclaimed rubber raw materials, production formula, production process, storage conditions for a comprehensive test, choose the best reclaimed rubber factory as a partner. Hebei Hongyun recycling plant not only has a stable supply of raw materials, sophisticated production equipment, top desulfurization process, also has a professional technical staff, clean and tidy parking environment, the ideal partner for rubber products business.
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