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TPE Overmolding Solutions for Engineering Thermoplastics Rajesh Varma, Applications Development Manager Dan Liu, Materials Scientist Walter Ripple, Director of Marketing Krishna Venkataswamy, Director of Research and Development Abstract Demands continue to increase in various consumer applications for ergonomically designed products. To enhance the performance in the end use application and marketability of such consumer products the use of a thermoplastic elastomers as an overmold, onto the engineering plastic has continued to grow.

Improved cut-through resistance, increased continuous use temperature, abrasion resistance, and mechanical toughness are all features of this product range. We continually monitor global regulations to stay current with the needs of our customers.

As the condiment market continues to diversify, the need to have distinctive packaging to stand out on the shelf will keep rising. Continuous Glucose Monitors (CGM)

Our global team is here to accelerate development and part approvals, supporting you with: • Materials that meet over 500 automotive polymer OEM specifications • More than 14,000 color and additive approvals for OEM specifications, including more than 2,000 UL94-registered concentrates and pre-colors • Advanced design and color expertise PORTFOLIO HIGHLIGHTS Specialized polymers and composites • Thermoplastic Elastomers • Recycled and Bio-based Thermoplastic Elastomers • Long Fiber Reinforced Formulations • Thermally Conductive Formulations • Static Dissipative, Electrically Conductive, and EMI/RFI Shielding Formulations • Pre-Colored Thermoplastics for Premium Finishes • Engineered Polymer Formulations • Continuous Fiber Tapes & Laminates Colorants, additives, and plastisols • Solid & Liquid Colorants (special effects & bio-based) • Colorant and Additive Concentrates • Functional and Performance Additives (UV, FR, antimicrobial, and more) • Liquid Additives • Chemical Foaming and Nucleating Agents • High-Temperature Concentrates • Silicone Dispersions • Vinyl Powders and Plastisols Design & Color Services • Avient Design • ColorWorks™ Design & Technology Centers UNDERHOOD Air Management Fuel Systems Filters/Cleaners Engines/Power train Fans & Shrouds Engine & Cam Covers Fluid Reservoirs Wire & Cable and Connectors Battery Systems & Supports EV Battery Systems Sensors/Controls/Actuators Turbo/Super Chargers Control Modules/Valves Gears & Hoses HVAC Systems Electrical Control Units EXTERIOR Move over metal... our material and colorant solutions enable you to replace metal and paint while improving miles per gallon or per charge.

We believe that our ongoing commitment to protect the environment, to remain at the forefront of fiber and coating technology, and to ‘treat others as we want to be treated’ will continue to drive the success of our customers, shareholders, and employees.

Continuous Glucose Monitors (CGM) 3D printing is having an impact on our world - learn how it can impact your business today

Unfortunately, this method only has limited durability and has a minimum amount of assembly repeatability.2 FIGURE 19 - Mechanical Fasteners Design Guidlines Potential high stress due to wedging action of screw head Potential high stress due to wedging action of screw head Poor DesignsPoor Designs Preferred DesignsPreferred Designs Planned gap between added bosses prevents excessive bending of hosing as bosses touch and go into compression Planned gap between added bosses prevents excessive bending of hosing as bosses touch and go into compression Alternative recessed head design avoids potentially dangerous wedging action Alternative recessed head design avoids potentially dangerous wedging action Truss or Round Head ScrewTruss or Round Head Screw Potential high bending stress as bolt is tightened Potential high bending stress as bolt is tightened Flat-head Screw Standard Screw Plastic Part Metal Sub-frame Shoulder Screw Plastic Metal Casting FIGURE 20 - Mechanical fasteners design guidelines σH = DShaft W = DShaft DShaft 1 + FIGURE 16 - Interference fit variable σH = DShaft W = DShaft DShaft 1 + FIGURE 17 - Geometry factor variable σH = DShaft W = DShaft DShaft 1 + FIGURE 18 - Hoop stress equation σH = DShaft W = DShaft DShaft 1 + FIGURE 19 - Press fit pull-out force .400 .500 .375 .373 .650 FIGURE 15 - Press fit example Design Guide 13 ADHESIVE TYPES A chart containing the various specific adhesive types, with advantages and disadvantages of both can be seen in the appendix. Design Guide 37 Hot spots Improper cooling Venting plugged Barrel too hot Too hot Melt temperature Reduced transfer position Check venting Add a flow leader Insure cushion position Insure proper screw recovery Add a foaming agent Increase hold pressure Reduce mold Increase mold Sink Root cause: Material is shrinking away from mold surface. 38 Gravi-Tech Condensation Wrong screw configuration Residence time too long Excessive decompression Check mold surface for condensation Check for condensation in feed throat Check dry material dew point Increase mold Reduce screw speed Reduce decompression Splay • Silver streaks on part Root cause: Material degradation Design Guide 39 Venting impaired Leaking check ring Heating band burned out Transfer position too high Clean mold surface Check vents Increase melt Increase mold Increase back pressure Decrease transfer Surface Finish Root cause: Material is not reproducing the mold surface finish. 40 Gravi-Tech Tooling damage Heater band overriding Leaking check ring Melt temperature Pack pressure too high Hold time too low Reduce gate size Increase cooling in gate area Check gate for blockage Check thermocouples for continuity Ensure cushion is maintained Dry material Reduce melt temperature Reduce tip temperature Gate Vestige Root cause: Material doesn’t have a clean break at gate.

Upon notification from the NEU supplier, NEU will notify the Customer of the effect on the manufacture of the compound(s) (such as raw material availability, vendor name changes, vendor manufacturing location, and vendor nomenclature). 9.0 CUSTOMER FEEDBACK 9.1 NEU will use commercially reasonable efforts to (i) acknowledge receipt of Customer complaints within one business day; (ii) conduct an investigation and communicate a resolution to Customer within 30 days after receipt of the complaint.

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