PVC is mainly used blowing agent ADC foaming agent and azobisisobutyronitrile and inorganic foaming agent. In addition, lead salts and cadmium salts also help foaming effect, make AC blowing agent decomposition temperature dropped to about 150 ~ 180 ℃. The amount of blowing agent may be based on the expansion ratio.
Used in building materials, electrical, automotive, aircraft, plastics, require a flame retardant. Generally contain halogen, antimony, boron, phosphorus, nitrogen and other compounds are flame retardant, a flame retardant can be used.
Rigid PVC plastic as high levels of chlorine are inherently flame retardant, the PVC cable, decorative plastic curtain walls and incorporation of flame retardant fabrics, increase its resistance to flame resistance. Common chlorinated paraffins, antimony trioxide (2-5 copies), phosphate flame retardants. Phosphate plasticizer and chlorinated flame retardancy.