Crystallinity in neck/body (white spots)
Cause
Slow cooling or overheating crystallizes PET, creating brittle white zones.
Corrective action
Improve mold cooling, reduce cycle time appropriately, check hot-runner hot spots.
← All defects
Slow cooling or overheating crystallizes PET, creating brittle white zones.
Improve mold cooling, reduce cycle time appropriately, check hot-runner hot spots.