2013年10月21日星期一

plastics processing aids Main Profile

The main reason is that this growth to continue in the alternative plastic materials traditional materials such as metal , wood, and minerals. In fact , various additives in the resin for the  fluorescent brightener successful application of plastic materials are of great help. In the use of various types of additives to the polymer impact modifiers and processing aids for the  polymer to provide the most unique and most valuable superior performance , but also improve the processing performance of the product . Toughening treatment, rheology control , beautiful appearance , processing performance , and economic factors that are important to the nature of the property . Many of these additives have been used for many years , after a long development derived from a wide range of varieties. A major reason for barium stearate  this situation is the emulsion polymerization process varied, which makes scientists continue to design suitable polymer components , polymer structure , polymer morphology and molecular weight / weight distribution . Low cost of production , and the resulting product is easy to separate the emulsion , therefore , in the commercial production of emulsion polymerization is very attractive . Subsequent to a variety of acrylic processing aid and an acrylic impact modifier . Initially , these additives are primarily used to improve the polyvinyl chloride (PVC) processability and toughness. And processing aids for PVC mainly to promote fusion of PVC , to enhance the melt strength , to improve the dispersion properties and surface quality. High molecular weight PVC foam processing aid is an important component. Means of processing aids , PVC foams can be obtained in a more homogeneous foam structure , and to reduce the breakdown of closed cell foam density will be lower . Act as a lubricant processing aids can effectively prevent the molten plastic bonded to the tin stabilizer  metal surface to improve the surface quality of products , improve production efficiency.
There are many applications of plastic materials is very limited , because they either do not have the required physical properties , or its processing performance is very poor , processing aids, is used to enhance the plastics melt processing, increase production, reduce parking maintenance time and provide better quality products . According to the type of functionality , processing aids can be divided into flux , melt rheology modifiers , lubricants and dispersing accelerator. In fact , each type of processing aids and have more than one effect. Any one processing aid functionality and application results to be dependent on its chemical composition , the polymer structure, molecular weight and type of the polymer matrix .

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