Decrease pack pressure 3. Increase pack pressure 4. Increase pack time 5.

Increase pack and hold pressure 5. Increase packing pressure 4. Decrease pack pressure 2.

UV attack by sunlight can be prevented by adding UV stabilizers to polymeric materials. LSR is inherently UV resistant and will not degrade when exposed to UV. With the right additives, TPEs can also hold up to UV.

Sink Marks Melt too hot Insufficient material volume • Increase shot size • Increase packing pressure Part geometry too thick • Reduce wall thickness • Reduce rib thickness Flash Injection pressure too high • Decrease injection pressure • Increase clamp pressure • Increase transfer position Excess material volume • Decrease pack pressure • Decrease shot size Melt and/or mold temperature too hot Loose clamp • Reset mold height • Increase clamp tonnage Shrink Too much shrink • Increase cooling time Too little shrink • Decrease cooling time Burning • Reduce decompression • Clean, widen and increase number of vents • Increase gate size to reduce shear Wet material • Verify material is dried at proper condition Nozzle Drool Nozzle temperature too hot • Decrease nozzle temperature • Decrease back pressure • Increase screw decompression • Verify material has been dried at proper conditions Incorrect nozzle • Use reverse taper tip Weld Lines Melt front temperatures are too low • Increase pack and hold pressure • Increase gate size • Identify end of fill pattern and verify proper vent location • Add vents or increase vent width • Move gate location Warp • Reduce injection speed • Increase pack pressure • Increase pack time • Increase cool time Mold design • Non-uniform mold cooling Part design • Non-uniform wall thickness Thermolator incorrect temperature • Check settings • Inspect thermocouple Sticking in Mold Overfilled cavity • Decrease injection rate and pressure • Decrease hold pressure • Decrease cooling time Part too hot • Decrease barrel temperature • Increase cooling time • Increase draft angle • Polish cores in direction of ejection Black Specks Contamination • Purge machine Degradation • Reduce melt temperature • Reduce screw speed • Reduce back pressure Machine related • Check for wear on screw, barrel or check ring Delamination • Purge barrel to eliminate material contamination • Reduce sharp corners in material flow path • Increase venting Discoloration Oversheared material • Decrease melt temperature • Reduce residence time Mold design • Increase gate sizing Dry material • Check moisture of material to ensure it is within the recommended moisture percentage for molding 1.844.4AVIENT www.avient.com Copyright © 2021, Avient Corporation.

Increase pack and hold pressures. Reduce the pack pressure. Reduce pack and hold pressure.

Homepage // News Center // Colorants and Additives from Avient for Sustainable Luxury Plastic Packaging to be Featured at LUXE PACK New York Avient will exhibit at the 20th annual LUXE PACK New York in booth E08, showcasing its range of solutions and services for sustainable luxury plastic packaging. LUXE PACK New York is the premier trade show for creative, luxury packaging taking place at the Javits Center May 10-11, 2023.

Homepage // News Center // PolyOne Provides New Twist for Aluminum Cap Liners with Low-Migration TPE Technology at Pack Expo 2015 LAS VEGAS – September 28, 2015 – Today at Pack Expo 2015, PolyOne (booth #6464) unveiled a low-migration aluminum cap liner technology based on its new GLS™ Versaflex™ PKG 4190 thermoplastic elastomer (TPE).

It then freezes after pack and hold and acts as a plug. However, a gate needs to be large enough to provide good packing. In relation, if the hold/pack time is too long, the runner will be packed out, which could cause processing problems

Discover the benefits UV light blockers offer for PET beverage packaging Effective UV light blocking additive technology optimizes PET container performance to provide greater protection for UV-sensitive beverages. With UV protection, formulators have more flexibility to use UV sensitive ingredients and not rely on the formulation alone to be UV-stable.

Discover the benefits UV light blockers offer for PET beverage packaging Effective UV light blocking additive technology optimizes PET container performance to provide greater protection for UV-sensitive beverages. With UV protection, formulators have more flexibility to use UV sensitive ingredients and not rely on the formulation alone to be UV-stable.