Gate type should be selected based on location and part geometry PROBLEM CAUSE SOLUTION Excessive Shrink Too much orientation • Increase packing time and pressure • Increase hold pressure • Decrease melt temperature • Decrease mold temperature • Decrease injection speed • Decrease screw rpm • Increase venting • Increase cooling time Not Enough Shrink Too little orientation • Decrease packing pressure and time • Decrease hold pressure • Increase melt temperature • Increase mold temperature • Increase injection speed • Increase screw rpm • Decrease cooling time Burning Melt and/or mold temperature too hot Mold design Moisture • Decrease nozzle and barrel temperatures • Decrease mold temperature • Clean, widen and increase number of vents • Increase gate size or number of gates • Verify material is dried at proper conditions Nozzle Drool Nozzle temperature too hot • Decrease nozzle temperature • Decrease back pressure • Increase screw decompression • Verify material has been dried at proper conditions Weld Lines Melt front temperatures too low • Increase pack and hold pressure • Increase melt temperature • Increase vent width and locations • Increase injection speed • Decrease injection speed • Increase gate size • Perform short shots to determine fill pattern and verify proper vent location • Add vents and/or false ejector pin • Move gate location Warp Excessive orientation • Increase cooling time • Increase melt temperature • Decrease injection pressure and injection speed • Increase number of gates Sticking in Mold Cavities are overpacked Part is too hot • Decrease injection speed and pressure • Decrease pack and hold pressure • Decrease nozzle and barrel temperatures • Decrease mold temperature • Increase cooling time • Increase draft angle • Decrease nozzle and barrel temperatures • Decrease mold temperature TROUBLESHOOTING RECOMMENDATIONS PROBLEM CAUSE SOLUTION Incomplete Fill Melt and/or mold temperature too cold Shot Size • Increase nozzle and barrel temperatures • Increase mold temperature • Increase injection speed • Increase pack and hold pressure • Increase nozzle tip diameter • Check thermocouples and heater bands • Enlarge or widen vents and increase number of vents • Check that vents are unplugged • Check that gates are unplugged • Enlarge gates and/or runners • Perform short shots to determine fill pattern and verify proper vent location • Increase wall thickness to move gas trap to parting line • Increase cushion Brittleness Melt temperature too low Degraded/Overheated material Gate location and/or size • Increase melt temperature • Increase injection speed • Measure melt temperature with pyrometer • Decrease melt temperature • Decrease back pressure • Use smaller barrel/excessive residence time • Relocate gate to nonstress area • Increase gate size to allow higher flow speed and lower molded-in stress Fibers on Surface (Splay) Melt temperature too low Insufficient packing • Increase melt temperature • Increase mold temperature • Increase injection speed • Increase pack and hold pressure, and time Sink Marks Part geometry too thick Melt temperature too hot Insufficient material volume • Reduce wall thickness • Reduce rib thickness • Decrease nozzle and barrel temperatures • Increase shot size • Increase injection rate • Increase packing pressure Flash Injection pressure too high Excess material volume Melt and/or mold temperature too hot • Decrease injection pressure • Increase clamp pressure • Decrease injection speed • Increase transfer position • Decrease pack pressure • Decrease shot size • Decrease injection speed • Decrease nozzle and barrel temperatures • Decrease mold temperature • Decrease screw speed TROUBLESHOOTING RECOMMENDATIONS www.avient.com Copyright © 2020, Avient Corporation.

The gate location is equally important. They are located along the tool parting line. Locating the gate at the top of the part minimizes this problem.

Fixed row] (2.3) Have you identified priority locations across your value chain? 2.3.1) Identification of priority locations Select from: ☑ Yes, we have identified priority locations (2.3.2) Value chain stages where priority locations have been identified Select all that apply ☑ Direct operations (2.3.3) Types of priority locations identified Sensitive locations ☑ Areas important for biodiversity ☑ Areas of limited water availability, flooding, and/or poor quality of water (2.3.4) Description of process to identify priority locations Avient uses the WRI Aqueduct tool and WWF Biodiversity tool to identify sites with high water and biodiversity risks (2.3.5) Will you be disclosing a list/spatial map of priority locations? Select all that apply ☑ No [Fixed row] (7.3) Describe your organization’s approach to reporting Scope 2 emissions. 148 Scope 2, location-based Scope 2, market-based Comment Select from: ☑ We are reporting a Scope 2, location-based figure Select from: ☑ We are reporting a Scope 2, market-based figure We are reporting location and market based emissions; both numbers have been assured.

What are the PolyOne Plant locations? Internal complaints are tracked and analyzed by location. All critical systems located central data center.

Validity Locations Scope Norm / Revision Reg. no. Appendix of main certificate H61173 Locations Scope Norm / Revision Reg. no.

Sustainability Report | 2019 13 P E O P L E Avient associates in our Knowsley, UK facility organized a beautification clean up event at Ainsdale Beach near Liverpool in September 2019. In higher-risk locations, we maintain detailed security preparedness plans. In this first wave of ENGAGE experiences, we reached over 2,300 associates at 50 locations.

Sustainability Report | 2019 13 P E O P L E Avient associates in our Knowsley, UK facility organized a beautification clean up event at Ainsdale Beach near Liverpool in September 2019. In higher-risk locations, we maintain detailed security preparedness plans. In this first wave of ENGAGE experiences, we reached over 2,300 associates at 50 locations.

Gate type should be selected based on location and part geometry. 2. Additional draft may be required for grained/textured surfaces. 4 Nymax Polymer Formulations Incomplete Fill Melt and/or mold too cold • Increase nozzle and barrel temperatures • Check thermocouples and heater bands Mold design • Enlarge or widen vents and increase number of vents • Check that vents are unplugged • Check that gates are unplugged • Enlarge gates and/or runners • Perform short shots to determine fill pattern and verify proper vent location • Increase wall thickness to move gas trap to parting line Shot size • Adjust transfer position to 98% full • Increase cushion Brittleness Wet material • Check moisture. 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 Mold design • Increase gate size • Perform short shots to determine fill pattern and verify proper vent location • Add vents and/or false ejector pin • Move gate location Warp Process related • Increase pack pressure • Increase pack time Mold design • Non-uniform mold cooling Part design • Non-uniform wall thickness Thermolator incorrect temperature • Check settings • Inspect thermocouple Processing Guide 7 Sticking in Mold Overfilled cavity • Decrease injection rate and pressure • Decrease pack and hold pressure • Adjust transfer position • Decrease cooling time Mold design • Increase draft angle • Polish cores in direction of ejection Part is too hot 1.844.4AVIENT www.avient.com Copyright © 2024, Avient Corporation.

No. 1, Qihang Industry Park, Haoxiang Road, Shajing Town, Baoan, Shenzhen, Guangdong, China 518104 (USI: C5M65R) and, if applicable, the remote supporting locations as mentioned in the Appendix accompanying this Certificate has been found to conform to the Quality Management System standard: IATF 16949:2016 This certificate is valid for the following scope: DESIGN AND MANUFACTURE OF PLASTIC COMPOUNDING MATERIAL EXCLUSION: NONE http://www.dnv.com Certificate no.: 273138-2018-AQ-RGC-IATF IATF Certificate No: 0558323 Place and date: Katy, TX, 10 December 2024 Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. Remote Support Locations included in the certification are as follows: Site Name Site Address RSL Activities Certification Body PolyOne Management (Shanghai) Co., Ltd. 2nd Floor, Building C, No.200, Jinsu Road, Pudong, Shanghai, P.R.

Incomplete Fill Melt and/or mold temperature too cold • Increase nozzle and barrel temperatures • Check thermocouples and heater bands Shot size • Increase shot size • Adjust transfer position to 98% full • Increase cushion • Enlarge or widen vents and increase number of vents • Check that vents are unplugged • Check that gates are unplugged • Enlarge gates and/or runners • Perform short shots to determine fill pattern and verify proper vent location • Increase wall thickness to move gas trap to parting line Brittleness Degraded/overheated material • Decrease melt temperature • Decrease back pressure • Use smaller barrel Gate location and/or size • Relocate gate to non-stress area • Increase gate size to allow higher flow rate and lower molded-in stress Wet material • Check moisture. 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.