PVC heat stabilizer in the process is an indispensable additive

PVC heat stabilizers are indispensable in the process additives , as human beings living on their own health and environmental concerns surrounding gradual increase awareness of the world has promulgated a series of measures to limit the use of heavy metal heat stabilizers .
Outside the industry generally believe that understanding of PVC heat stabilizers environmental protection has become an tribasic lead sulphate  irreversible trend , PVC heat stabilizers in the process of environmental protection , research and development non-toxic, non-polluting , composite , and efficient heat stabilizers have been more widely application .
PVC resin having a self- catalytic release HCL, or to instability of the PVC resin produced by reflection from the addition polyalkylene structure , to prevent or reduce the decomposition of PVC resin . Generally used in the formulation of the thermal stabilizer features, functions and products required to consider. Here are a few people stabilizer features:
1 lead salt stabilizer is mainly used  vegetable stearic acid in hard products in . Lead salt stabilizer has good thermal stability , excellent electrical properties , low cost and so on. But its toxicity, easily contaminated products, can only produce opaque products. In recent years, large numbers of composite stabilizer , one-component stabilizer has the danger of being replaced . Composite stabilizer is characterized by specific and strong , pollution, processing enterprises, the advantages of simple ingredients . However, no uniform standard, so each of the composite stabilizer vary greatly.
2 barium cadmium -based stabilizers is white foaming agent  better performance of a heat stabilizers . Wider use of PVC plastic sheeting . Usually barium cadmium and zinc and organic phosphite antioxidant and use .
3 calcium zinc stabilizers can be used as non-toxic stabilizers used in food packaging and medical devices, pharmaceutical packaging, but its stability is relatively low education , a large amount of calcium -based stabilizers when transparency is poor , easy to spray cream. Calcium zinc stabilizers are usually used polyols and antioxidants to improve its performance, the country has recently been used in rigid pipe Ca-Zn compound stabilizer appears.
4 organotin heat stabilizers better performance for rigid PVC products with a better variety of transparent products , especially toxic octyl tin packaging products almost become indispensable stabilizer.