In the extrusion process, the general requirements of the case, not granulation. PVC compound if the particles in use, the effect will be better, because in the granulation process, fully mixed, whether uniformity or plasticizing performance is the best, in the injection process, is generally the use of particles.
In the requirements of non-flammable, high-intensity, climate change and excellent geometrical stability, and the oxidant, reducing agent and strong resistance, and other special requirements, PVC compound must be prepared into granules, with granular state of PVC compound to meet the above performance
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