Updated: · Plastay Kimya
PVC stabilizer troubleshooting: yellowing and plate-out
Automatically increasing stabilizer dosage is not the best starting point for yellowing, black specks or die deposits.
Automatically increasing stabilizer dosage is not the best starting point for yellowing, black specks or die deposits. Record when the issue appears, which batches are involved and whether cleaning changes the result. Evaluate the interaction between formulation and processing.
A controlled troubleshooting sequence
Check actual melt temperature, residence time and mixing cycle. Review lubrication balance and filler or pigment changes. A short run using the reference formulation can help separate material and machine effects. Test stabilizer changes within the dosage range agreed with the technical team; a one-pack designed for one application may not transfer directly to another line.
Related products and technical evaluation
ASSAFE — Calcium-zinc (Ca-Zn) PVC stabilizer
Select a Ca-Zn system together with PVC resin, filler, plasticizer, lubrication balance and processing temperature. Initial colour and long-term thermal stability are distinct targets. Validate the grade and dosage through a production trial; the Ca-Zn designation is not automatic certification of the finished product.
Discuss your application with the technical team →ASMIX — Lead-based PVC stabilizer
Review destination-market and application-category restrictions before selecting a lead-based system. Technical performance does not establish regulatory suitability. When evaluating a Ca-Zn alternative, compare thermal stability, lubrication balance and finished-product tests together.
Discuss your application with the technical team →
