ColorMatrix™ Eze™ Slip Agent - Process aid that reduces surface friction to offer efficiencies during injection and blow molding processes. Eliminate the need for secondary processing and sleeves with molded-in special effects.

Exhibit 31.1 CERTIFICATION I, Robert M. Patterson Exhibit 31.2 CERTIFICATION I, Bradley C. Exhibit 32.2 CERTIFICATION PURSUANT TO 18 U.S.C.

PP OVERMOLDING HARDNESS REGULATORY STERILIZATION CHARACTERISTICS Dynaflex™ G2706 28A USP Class VI, ISO 10993, Food contact EtO Soft translucent grade, grippy feel Dynaflex™ G2711 43A USP Class VI, ISO 10993, Food contact EtO Highly colorable solution, grippy feel, low compression set Versaflex™ CL2242 & CL2250 42A/ 50A USP Class VI, ISO 10993, US Food contact EtO Clear boilable grades; ABS, PC bondable Versaflex™ G2705 N 60A USP Class VI, ISO 10993, Food contact EtO/Steam High resilience, low compression set Versaflex™ HC3810 20A-90A USP Class VI, ISO 10993 EtO General purpose, unfilled ABS, PC OVERMOLDING HARDNESS REGULATORY STERILIZATION CHARACTERISTICS Versaflex™ OM1040 40A USP Class VI, ISO 10993 EtO Translucent Versaflex™ OM3060 60A USP Class VI, ISO 10993 EtO Clear VERSAFLEX™ CL AND DYNAFLEX™ TPEs OVERMOLDING FOR ERGONOMICS • Adds good tactile surface with soft-touch feel • Available in a variety of color effects and textures • Improves grip, cushion, and comfort • Enhances functional performance like sealing properties, vibration damping, oxygen barrier, and scratch and abrasion resistance • Reduces assembly costs, good processability • Offers excellent adhesion to a wide range of substrates • Glucometers • Medical tools overmolds • Injector pens • Analysis devices VERSALLOY™ HC & VERSAFLEX™ HC TPEs SEALING & RESEALING • Rubbery feel and soft touch • No coring, good puncture, and resealability in static stoppers • Meets low coefficient of friction requirements in dynamic seals • Low extractables • Suitable to overmold onto polyolefins • Sealing and resealing septum • Seals and sanitary gaskets • Syringe plungers and tips MATERIAL DESCRIPTION HARDNESS REGULATORY STERILIZATION CHARACTERISTICS Versalloy™ HC 9210-45N 45A USP Class VI EtO Good processability, HC 9210-55N 55A USP Class VI EtO Good processability, HC 9210-70N 70A USP Class VI EtO Good processability, HC 9220-43N 43A USP Class VI, ISO 10993-4/5 EtO Extrusion grade, high temperature resistance Versaflex™ HC 2110-35N 34A FDA, USP Class VI, ISO 10993 Autoclave EtO radiation Resealing, elevated comp set Versaflex™ HC 2110-57B 57A FDA, USP Class VI, ISO 10993 Autoclave EtO radiation Low stiction VERSAFLEX™ CL AND DYNAFLEX™ TPEs HIGH CLARITY GRADES WITHOUT PLASTICIZERS • Water clear grades formulated without phthalate plasticizers • Meets medical regulatory USP Class VI and ISO 10993-4,5 • Food contact and FDA compliant • Autoclave and radiation stable • Low extractable • High clarity (Haze 50 4.1, 100 4.5, 100 4, 70 6, 70 Tensile Modulus (MPa) 2200 2700 2600 2350 1820 1820 Flexural Strength (MPa) 80 90 104 86 68 68 Flexural Modulus (MPa) 2500 2700 2500 2300 1980 1590 HDT: 0.45, 1.8 (MPa) 110, 80 90, 80 100, 89 123, 100 123, 64 100, 70 UL-94 Rating @ 3.0 mm 5VA V-0 5VA V-0 HB V-0 UL-94 Rating @ 1.5 mm V-0 V-0 5VB V-0 HB V-0 UL-94 Rating @ 0.75 mm V-1 V-2 V-0 None None V-2 COMPETITIVE MATERIAL COMPARISON ENGINEERED POLYMER FORMULATIONS FOR HEALTHCARE TRILLIANT™ HC THERMOPLASTICS The family of Trilliant™ HC high-performance thermoplastics is formulated to meet the growing challenges of medical devices and equipment.

Wulfsohn      POLYONE CORPORATION68 Exhibit 31.1 CERTIFICATION I, Robert M. Richardson   POLYONE CORPORATION Exhibit 32.1 CERTIFICATION PURSUANT TO 18 U.S.C. POLYONE CORPORATION Exhibit 32.2 CERTIFICATION PURSUANT TO 18 U.S.C.

KEY CHARACTERISTICS • Derived from end-of-life tires • Available for multiple resins and custom solutions • Retains performance characteristics of traditional carbon black in plastics • Enhances sustainable product offerings • Provides long-term price stability • Passes REACH and RoHS requirements • Prop 65 letters available MARKET AND APPLICATIONS OnColor RC Environmental Black is a sustainable solution across a wide variety of industries and applications, including: • Automotive • Wire and cable • Building and construction • Appliances • Electrical and electronics • Industrial molding applications • Office furniture Avient OnColor RC Environmental Black is offered for multiple resins and also for custom solutions: CC10289240WE OnColor RC Environmental Black PE CC10284887WE OnColor RC Environmental Black TPU CC10287020WE OnColor RC Environmental Black PC CC10287026WE OnColor RC Environmental Black PS CC10287028WE OnColor RC Environmental Black PP CC10287033WE OnColor RC Environmental Black ABS www.avient.com Copyright © 2020, Avient Corporation.

KEY CHARACTERISTICS • Derived from recycled content including end-of-life tires • Available for multiple resins and custom solutions • Retains performance characteristics of traditional carbon black in plastics • Passes REACH and RoHS requirements • Prop 65 letters available • Certified by TÜV Rheinland • PCF calculation available on request MARKET AND APPLICATIONS OnColor REC Polymer Colorants are sustainable solutions across a wide variety of industries and applications, including: • Automotive • Wire and cable • Building and construction • Appliances • Electrical and electronics • Industrial molding applications • Office furniture 1.844.4AVIENT www.avient.com Copyright © 2024, Avient Corporation.

OnColor™ Recovered Black is designed for use in both injection molding and extrusion processing, and can be a good choice for a range of applications: • Industrial parts • Transportation, including structural or underhood components • Pipes and fittings • Building & construction applications • Thick sheet extrusions KEY CHARACTERISTICS • Reduction of plastic materials in disposals or landfills; promotes responsible care • Cost-effective option for non-critical color applications • Custom color critical applications available 1.844.4AVIENT www.avient.com Copyright © 2022, Avient Corporation.

It is available in liquid color form for injection molding applications using polyolefin resins.