What's the difference between type 5 resin powder and type 8 resin powder?
SG-8 and SG-5 resin production process is basically the same, the production device is exactly the same. The main difference lies in additives, formula, polymerization temperature, reaction pressure and so on.
SG-8 type resin, reaction temperature and pressure has basically reached the polymerizer working pressure limit, the reaction requires relatively harsh conditions, more strict operation, safety, technology, personnel quality and other aspects of the requirements, and it is more difficult to control the quality of resin.Use:SG5 (K-65, S1000): pipes, profiles, plates and so on;SG3 (K-70, S1300): mostly soft products, hoses, wires, cables, films, shoes, toys, auto parts;SG7, SG8 (K-60, S800, S700): pipe fittings, sheets, containers, etc..
You mean PVC? The smaller the number, the greater the degree of polymerization, the greater the molecular weight, the higher the strength, but the more difficult it is to melt the flow, the more difficult it is to process. A large amount of plasticizers are needed. Type 5 is generic, type 3 is generally used for soft goods, and type 7-8 is for hard goods.
