PVC resin (polyvinyl chloride resin) is a multifunctional thermoplastic plastic with excellent chemical stability, corrosion resistance, electrical insulation and low cost.
Classification by VA content**
- **Low VA (5%~10%)**: used for modified PE, packaging film, cable sheath.
- **Medium VA (10%~30%)**: shoe materials, hot melt adhesive, toys.
- **High VA (30%~50%)**: medical materials, soft seals.
Classification by degree of polymerization**
- **Low degree of polymerization PVA**: used in cosmetics and pharmaceutical sustained-release agents.
- **Medium degree of polymerization PVA**: commonly used in adhesives and coatings.
- **High degree of polymerization PVA**: used to make high-strength fibers (such as vinylon) and engineering plastics
Antimony trioxide (Sb₂Oₑ) is an important inorganic compound that is widely used in flame retardants, catalysts, the glass industry, pigments and other fields