Compound Color Stability & Processing Improvements
Compound Color Stability & Processing Improvements
Color stability in PVC compounds depends on stabilizers, pigments, plasticizers and processing conditions. Yellowing, burning and surface defects are common issues that must be controlled.
1. Factors Affecting Color Stability
Ca-Zn stabilizers → lower yellowing
Organic stabilizers → higher clarity
Heat-resistant pigments
Compatible plasticizers (DOTP > DINP > DOP)
2. Processing Improvements
Reduce processing temperature
Improve extrusion homogeneity
Optimize lubricants
Reduce VOC
Adjust stabilizer dosage
3. Additives That Improve Performance
UV stabilizers
Anti-plateout boosters
Heat resistance enhancers
Conclusion
Optimizing stabilizers, pigments and processing conditions results in improved color stability and overall compound performance.