Introduction and role of the principle of processing aid

PVC is a very special thermoplastic resin processing its pure decomposition, poor mobility, low impact strength, poor weather, and therefore need to add all kinds of supplementary material in the process to improve its performance. Such as: lubricants, heat stabilizers, impact modifiers, processing aids and the like. Processing aids in the development and application process, according to the product ingredients be plastic processing aid  into the following broad categories: methyl methacrylate acrylate copolymer, styrene copolymer, acrylonitrile styrene, at present use the largest, the best is acrylate copolymer. The main role of processing aids are: to accelerate the process of PVC plastics. Improve the rheological properties of thermoplastic melt. Improve the mechanical properties of melt under the heat elastic state. Integrated functions such as improving the appearance of Processing aid  products. Although the addition amount of the processing aid, but the processing performance is improved PVC is very important. Role of the principle of processing aids: PVC melt due to poor ductility, easily lead to melt broken; PVC melt relaxation slow, easily lead to the product surface rough, dull and shark skin and so on. Therefore, it often requires the addition of PVC processing when processing aids to improve its melt these defects. Processing aids to improve the performance of resin processing aids, and its main role in three ways: to promote the molten resin to improve the rheological properties of melt and give the lubrication function.