The substrates materials employed for overmolding were PP, ABS, PC/ABS, polyester, Nylon and POM. Compared to other substrates, Nylon and polyacetal, i.e., POM, appear to be difficult to bond. Adhesion value of TPE-2 on different substrates TPE-2A TPE-2B Substrate Peel Strength (N/mm) Failure Type Peel Strength (N/mm) Failure Type PP 4.9 Adhesive 3.6 Adhesive PET 1.2 Adhesive 3.9 Adhesive PC/ABS 3.3 Adhesive 4.0 Adhesive ABS - Adhesive 4.3 Adhesive Nylon 1.2 Adhesive 2.7 Adhesive POM 1.1 Adhesive 1.9 Adhesive 6 Figure 3.

TPE suppliers have responded developing a variety of compounds with the attributes to bond to several engineering plastics such as nylon (PA), polycarbonate (PC), Acrylonitrile-butadiene-styrene (ABS), and PC/ABS alloys This paper elaborates different TPE technologies developed to bond to various rigid substrates i.e. Nylon (PA), Polycarbonate (PC), Acrylonitrile-butadiene- styrene (ABS), and PC/ABS alloys Introduction A wide variety of thermoplastic materials are used to make molded products. The focus for this study was to develop thermoplastic elastomer compounds that would overmold onto substrates made from Nylon (PA), Polycarbonate (PC), Acrylonitrile-butadiene-styrene (ABS), and PC/ABS alloys.

Base Resin ABS PA PBT PC PE PEEK PP PPS Barrel Temperatures °F (°C) Rear Zone 400–475 (200–250) 480–540 (248–282) 480–520 (250–270) 480–570 (250–300) 400–445 (200–230) 660–700 (350–475) 400–440 (200–225) 520–600 (270–300) Center Zone 410–480 (205–253) 490–550 (254–287) 485–525 (251–273) 500–580 (260–305) 410–455 (207–237) 670–710 (357–385) 410–450 (205–230) 550–610 (285–310) Front Zone 420–490 (210–257) 500–560 (260–293) 490–530 (254–276) 515–590 (267–310) 420–465 (213–243) 680–720 (363–400) 420–455 (215–235) 570–620 (300–320) Nozzle 425–500 (215–260) 510–570 (265–298) 490–540 (254–282) 530–600 (275–315) 430–475 (220–250) 700–730 (370–395) 430–460 (220–240) 610–620 (320–325) Melt Temperature 425–515 (215–270) 510–570 (265–298) 490–540 (254–282) 530–615 (275–325) 430–495 (220–260) 700–725 (370–385) 430–475 (220–250) 610–635 (320–335) Mold Temperature 140–200 (60–90) 150–300 (65–148) 140–280 (60–137) 160–240 (70–115) 80–140 (25–60) 300–400 (150–200) 80–140 (25–60) 190–300 (90–150) Drying Parameters 190 (90) 2–4 Hours 0.01%–0.15% 180 (82) 4–5 Hours 0.10%–0.20% 275 (135) 3–4 Hours 0.02%–0.04% 250 (125) 3–4 Hours 0.02% 160 (70) 2 Hours 300 (150) 3–4 Hours 0.10% 160 (70) 2 Hours 280 (135) 2–3 Hours 0.01%–0.20% Nozzle Type General Purpose Nylon or Reverse Taper General Purpose General Purpose General Purpose General Purpose General Purpose General Purpose Injection Velocity1 2–5 in/sec; 50–127 mm/sec Injection Pressure Medium to high (may range from 1,000–4,000 psi; 7-28 Mpa) Back Pressure 50–100 psi; 0.3–0.7 Mpa Screw Speed 25–75 RPM Cushion 0.125–0.250 in; 3–6 mm Screw Compression Ratio2 2.0:1–2.5:1 Processing Guide 3 Base Resin ABS PA PBT PC PE PEEK PP PPS Barrel Temperatures °F (°C) Rear Zone 400–475 (200–250) 480–540 (248–282) 480–520 (250–270) 480–570 (250–300) 400–445 (200–230) 660–700 (350–475) 400–440 (200–225) 520–600 (270–300) Center Zone 410–480 (205–253) 490–550 (254–287) 485–525 (251–273) 500–580 (260–305) 410–455 (207–237) 670–710 (357–385) 410–450 (205–230) 550–610 (285–310) Front Zone 420–490 (210–257) 500–560 (260–293) 490–530 (254–276) 515–590 (267–310) 420–465 (213–243) 680–720 (363–400) 420–455 (215–235) 570–620 (300–320) Nozzle 425–500 (215–260) 510–570 (265–298) 490–540 (254–282) 530–600 (275–315) 430–475 (220–250) 700–730 (370–395) 430–460 (220–240) 610–620 (320–325) Melt Temperature 425–515 (215–270) 510–570 (265–298) 490–540 (254–282) 530–615 (275–325) 430–495 (220–260) 700–725 (370–385) 430–475 (220–250) 610–635 (320–335) Mold Temperature 140–200 (60–90) 150–300 (65–148) 140–280 (60–137) 160–240 (70–115) 80–140 (25–60) 300–400 (150–200) 80–140 (25–60) 190–300 (90–150) Drying Parameters 190 (90) 2–4 Hours 0.01%–0.15% 180 (82) 4–5 Hours 0.10%–0.20% 275 (135) 3–4 Hours 0.02%–0.04% 250 (125) 3–4 Hours 0.02% 160 (70) 2 Hours 300 (150) 3–4 Hours 0.10% 160 (70) 2 Hours 280 (135) 2–3 Hours 0.01%–0.20% Nozzle Type General Purpose Nylon or Reverse Taper General Purpose General Purpose General Purpose General Purpose General Purpose General Purpose Injection Velocity1 2–5 in/sec; 50–127 mm/sec Injection Pressure Medium to high (may range from 1,000–4,000 psi; 7-28 Mpa) Back Pressure 50–100 psi; 0.3–0.7 Mpa Screw Speed 25–75 RPM Cushion 0.125–0.250 in; 3–6 mm Screw Compression Ratio2 2.0:1–2.5:1 Comments 1. PC Compounds: 0.001"–0.002" depth and 0.250" width PC/PSU Compounds: 0.002"–0.003" depth and 0.250" width PES Compounds: 0.003"–0.004” depth and 0.250" width PEI Compounds: 0.001"–0.003” depth and 0.250" width PP Compounds: 0.001"–0.002” depth and 0.250" width ABS Compounds: 0.0015"–0.0025” depth and 0.250" width PEEK Compounds: 0.002"–0.004” depth and 0.250" width Nylon Compounds: 0.002" min. depth and 0.250" width Increase vent depth to 1.0mm (0.040") at 4.0mm (0.250") away from the cavity and vent to atmosphere.

Ultimately, a Polystrand™ 8-ply fiberglass reinforced PETG laminate overmolded in nylon hit the sweet spot—providing just the right ratio of flexibility and strength that makes the binding worthy of a premium designation.

KEY BENEFITS • Consistent performance with all levels of rPET; 25%, 50% and 100% • Improved haze and color • Can be used with many different resin/grades • Non-nylon based • Simple to use with existing mono-layer equipment • Suitable for use on multi-layer machines Sustainability Spotlight Recycle Solutions TARGET MARKET & APPLICATIONS PET and rPET rigid packaging for food & beverage REGULATORY ColorMatrix Amosorb 4020R meets direct food contact regulatory requirements in major markets.

KEY BENEFITS • Exceptional recyclability • Compatible with rPET (recommended for >25% rPET content) • Non-nylon based • No scavenging delay or deactivation • Flexibility to employ a wider span of LDR levels to reach long-term shelf life • Excellent bottle aesthetics even at higher LDR • Simple to use with existing mono-layer equipment • Suitable for use on multi-layer machines Copyright © 2025, Avient Corporation.

All Rights Reserved 2025 11 Specialty Engineered Materials - Q4 2024 performance Sales 260 280 Q4 2023 Q4 2024 EXCL. All Rights Reserved 2025 Color, Additives & Inks END MARKETS REGIONS 34% 21% 15% 11% 9% 8% Packaging Telecom 1%Energy 1% Transportation Industrial Consumer 34% 37% 20% 9% US & Canada Latin America Asia Europe, Middle East and Africa Healthcare Building & Construction 21Copyright © . All Rights Reserved 2025 23 NON-HYDROCARBON MATERIALS HYDROCARBON-BASED ~35% of the raw material basket including part of “Other raw materials” are hydrocarbon-based Raw material basket 16% 14% 9% 2% 37% 9% 5% 4% 4% Performance additives Pigments TiO2 Dyestuffs Styrenic block copolymers Polypropylene Nylon Polyethylene Other raw materials Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except for per share data) Senior management uses comparisons of adjusted net income from continuing operations attributable to Avient shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results.

Table 2: GLS 271-051 overmolded to polyacetal (Delrin511P) and its copolymer (Hostaform 9021) LC 271-051 to Delrin 511P Average, N/mm Maximum,N/mm Mode of failure Melt temperature 1.65 1.95 Adhesive 220°C 1.84 1.98 Adhesive 220°C LC 271-051 to Hostaform 9021 Average, N/mm Maximum,N/mm Mode of failure Melt temperature 2.12 2.22 Adhesive 220°C 2.14 2.33 Adhesive 220°C Universal Polyamide Overmold Update: In earlier studies, robust universal polyamide overmolding materials and their benefits were introduced,2,3 where overmoldability of a 60 shore A and a 75 shore A material to Nylon was demonstrated. Furthermore, the material has outstanding adhesion to Ultramid B3G6 (glass reinforced polyamide 6) as demonstrated in Figure 10 and 11. OM6240 adhesion to Ultramid B3ZG6 1.7 1.91.9 0.0 0.5 1.0 1.5 2.0 250°C 260°C 270°C Melt temperature A vg . p ee l, N /m m Injection speed: 64 mm/sec Figure 10: Versfalex OM 6240 adhesion values to polyamide Ultrmid B3ZG6 OM6240 adhesion to Ultramid B3ZG6 1.7 1.91.9 0.0 0.5 1.0 1.5 2.0 250°C 260°C 270°C Melt temperature A vg . p ee l, N /m m Injection speed: 64 mm/sec Figure 11: Versaflex OM 6258 adhesion values to polyamide Ultrmid B3ZG6 GLS Corporation, 833 Ridgeview Drive, McHenry, IL 60050

FX +4.6% FX -1.5% Total Avient +3.1% Note: Regional Sales Percentages exclude impact of foreign exchange Q2 2024 SEGMENT PERFORMANCE (COLOR, ADDITIVES & INKS) $525 $542 Q2 23 Q2 24 $94 $108 Q2 23 Q2 24 19.9% Sales Adjusted EBITDA (in millions) (in millions) Sales Adjusted EBITDA 7 17.9% +200 bps * * * Adjusted EBITDA Margin % • Organic sales growth in all regions led by Americas • Raw material deflation combined with cost reduction actions drove EBITDA margin expansion + 3% (+5% excluding FX) + 15% (+17% excluding FX) Q2 2024 SEGMENT PERFORMANCE (SPECIALTY ENGINEERED MATERIALS) $301 $308 Q2 23 Q2 24 $60 $64 Q2 23 Q2 24 20.6% Sales Adjusted EBITDA (in millions) (in millions) Sales Adjusted EBITDA 8 19.8% +80 bps * * * Adjusted EBITDA Margin % • Sales growth in consumer, healthcare and building & construction end markets offset by weaker demand in telecommunications • EBITDA margin expansion driven by positive end market mix as well as raw material deflation + 2% (+4% excluding FX) + 7% (+8% excluding FX) 2024 G U IDA N CE FY 2024 GUIDANCE Previous (May 7) Current Adjusted EBITDA $510 to $535 million $515 to $540 million Adjusted EPS $2.50 to $2.65 $2.55 to $2.70 Interest Expense $105 million $105 million Adjusted Effective Tax Rate 23% to 25% 23% to 25% Capital Expenditures ~$140 million ~$140 million 10 Q3 2024: Adjusted EPS of $0.62 11 Highlights • Provides performance updates on 2030 Sustainability Goals • Reduced company’s Scope 1 & 2 GHG emissions by 48% since 2019 • Highlights ESG performance ratings, certifications, and awards, including recent upgrades by Ecovadis to Gold and CDP to A- • Reflects Great Place to Work® culture focused on health, safety and employee engagement 2023 SUSTAINABILITY REPORT 11 Sustainability for a Better Tomorrow 2023 SUSTAINABILITY REPORT 12 • Investor Day to be held December 4, 2024 in New York, NY • The focus will be to do a deep dive on the Company’s strategy • Further details to be communicated 2024 AVIENT INVESTOR DAY AP P EN D IX 15 Performance Additives 15% Pigments 13% TiO2 9% Dyestuffs 2% Polyethylene 10%Nylon 5% Polypropylene 4% Styrenic Block Copolymer 4% Other Raw Materials 38% ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials RAW MATERIAL BASKET SEGMENT DATA U.S. & Canada 41% EMEA 36% Asia 18% Latin America 5% 2023 SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Consumer 19% Packaging 23%Industrial 16% Building and Construction 9% Telecommunications 4% Energy 5% Defense 7% END MARKET REVENUE $2,007M $358M $1,138M $224M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $502M$3,143M (1) Transportation 10% Healthcare 7% 17 (1) Total company sales and adjusted EBITDA of $3,143M and $502M, respectively, include intercompany sales eliminations and corporate costs 2023 REVENUE | $2 .0 B ILL ION US & Canada 34% EMEA 37% Asia 21% Latin America 8% END MARKET REGION 18 Packaging 34% Consumer 21% Healthcare 8% Industrial 15% Transportation 9% Building & Construction 10% Telecommunications 1% Energy 2% COLOR, ADDITIVES & INKS 2023 REVENUE | $1 .1 B ILL ION US & Canada 52% EMEA 35% Asia 13% 19 Packaging 5% Consumer 16% Healthcare 6%Industrial 16% Transportation 12% Telecommunications 9% Energy 10% Defense 18% Building & Construction 8% END MARKET REGION SPECIALTY ENGINEERED MATERIALS Packaging 32% Consumer 26% Healthcare 9% Industrial 13% Building & Construction 6% Telecommunications 2% Energy 2% Defense 1% Asia (18% of sales) Transportation 9% 2023 AVIENT REGIONAL SALES Packaging 25% Consumer 13% Healthcare 5% Industrial 18% Building & Construction 9% Energy 5% Defense 8% EMEA (36% of sales)Transportation 13% Packaging 13% Consumer 22% Healthcare 10% Industrial 16% Building & Construction 12% Energy 6% Defense 8% US & Canada (41% of sales) Transportation 9% Packaging 59% Consumer 22% Healthcare 2% Industrial 8% Building & Construction 4% LATAM (5% of sales) Transportation 5% Telecommunications 4% Telecommunications 4% 20 BY END MARKET Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except for per share data) Senior management uses comparisons of adjusted net income from continuing operations attributable to Avient shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results.

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