Background of old nylon overmolding compared to new polyamide technology

FOR CONVERTERS Compete in premium markets – Gravi-Tech material’s luxury aesthetics allow plastics converters to reach new markets by competing against aluminum, zinc, iron, or steel and other alloys. DEFECTS Design Guide 41 SOURCES Mold Machine Material Process Hot spots Improper cooling Impaired venting Heater band overriding Leaking check ring Contamination New lot No cushion Hold pressure too low Melt temperature too high Reduce transfer position Back pressure too low RECOMMENDED ADJUSTMENTS Check gate for blockages Check runner shutoffs Increase gate size Add a flow leader Ensure cushion is maintained Make sure screw is transfer- ring at correct position Dry material Increase/decrease melt temperature Increase mold temperature Reduce injection speed Increase hold pressure Increase hold time Voids • Usually occurs in a thick section where the melt remains hotter than the rest of the part. DEFECTS Design Guide 43 SOURCES Mold Machine Material Process Impaired venting Heater band burned out Leaking check ring Contamination New lot Injection speed too low Hold pressure too low Transfer too high Melt temperature too low RECOMMENDED ADJUSTMENTS Check vents Change gating location Increase wall thickness Increase mold temperature Increase melt temperature Increase injection speed Increase hold pressure Increase hold time Weld Lines Root cause: Plastic flowed around a feature and has ‘welded’ back together. 44 Gravi-Tech APPENDIX INJECTION UNIT The injection unit is comprised of three main pieces, the screw, barrel, and hopper.

We undertake no obligation to publicly update forward-looking statements, whether as a result of new information, future events or otherwise. Interconnected disruptive markets with massive innovation needs Avient Corporation 106 Potential Opportunities  Functionalized Bio- compatible resins / additives  Chemical / UV resistance  Ambient Control  Thermal Conductivity  EMI Shielding  Low Dissipation Materials  Ambient Control  Sustainability  Functionalized Bio- compatible resins / additives  Bio-pharma Packaging Miniaturization with High Performance Computing needs  Metamaterials  Pristine Thermal, EMI management  Adapting existing capabilities to new markets  Developing new capabilities as needed to create & capture value ROBOTICS HEALTHCARE SEMICONDUCTORS ARTIFICIAL INTELLIGENCE Adv. Whether an additional line at an existing manufacturing plant, or a new facility in a growing region, we ramp-up quickly and cost-efficiently.

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in the marketplace and enable us to better serve our customers in new and existing markets and applications. news library online, please visit www.polyone.com/news. SEARCH INVESTOR NEWS

• Use the optimum velocity from the previous step and once again, fill the part to 95% full • Add just enough hold pressure to fill out the part, until it is just full - There should be sinks in the part; it should not look like a final part • Increase the hold pressure until the part slightly flashes, around the parting line of the part • Once these two values have been found, take the average of them, and this is the hold pressure to be used when processing - If sinks are found in the part at the new hold pressure, increase it until the sinks disappear or flashing occurs. DEFECTS Design Guide 41 SOURCES Mold Machine Material Process Hot spots Improper cooling Impaired venting Heater band overriding Leaking check ring Contamination New lot No cushion Hold pressure too low Melt temperature too high Reduce transfer position Back pressure too low RECOMMENDED ADJUSTMENTS Check gate for blockages Check runner shutoffs Increase gate size Add a flow leader Ensure cushion is maintained Make sure screw is trans- ferring at correct position Dry material Increase/decrease melt temperature Increase mold temperature Reduce injection speed Increase hold pressure Increase hold time Voids • Usually occurs in a thick section where the melt remains hotter than the rest of the part. DEFECTS Design Guide 43 SOURCES Mold Machine Material Process Impaired venting Heater band burned out Leaking check ring Contamination New lot Injection speed too low Hold pressure too low Transfer too high Melt temperature too low RECOMMENDED ADJUSTMENTS Check vents Change gating location Increase wall thickness Increase mold temperature Increase melt temperature Increase injection speed Increase hold pressure Increase hold time Weld Lines Root cause: Plastic flowed around a feature and has ‘welded’ back together. 44 Gravi-Tech APPENDIX INJECTION UNIT The injection unit is comprised of three main pieces, the screw, barrel, and hopper.

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