https://www.avient.com/knowledge-base/article/designing-molds-styrenic-block-copolymers-sbc?rtype[]=1164
In parts that fill from a thin wall to a thick section, the polymer may break away from the wall as it enters the thick section.
This will create a back filling flow and result in a surface knit line.
To prevent this, gate size and fill rate must be right.
https://www.avient.com/knowledge-base/article/designing-molds-styrenic-block-copolymers-sbc
In parts that fill from a thin wall to a thick section, the polymer may break away from the wall as it enters the thick section.
This will create a back filling flow and result in a surface knit line.
To prevent this, gate size and fill rate must be right.
https://www.avient.com/industries/packaging/beverage-packaging
Keep your energy and sports drinks high performing with packaging having UV protection and our TPE cap liners for hot fill applications.
Deliver the great taste and nutrients that your consumers demand by using packaging with UV protection and TPE cap liners for hot fill applications.
Keep your energy and sports drinks high performing with packaging having UV protection and our TPE cap liners for hot fill applications.
https://www.avient.com/sites/default/files/2020-12/artisan-thermoplastics-nylon-processing-guide.pdf
Processing Guide 3 Start Up & Shut Down Recommendations Purge Compound 2–3 melt flow PP or purging compound.
Place vents at the end of fill and anywhere potential knit/weld lines will occur 2.
Cut vent depths to 0.0007″–0.0015″ Draft Angle Maintain a minimum draft angle of 1° per side 4 Artisan Pre-Colored Thermoplastics Troubleshooting Recommendations Problem Cause Solution Incomplete Fill Melt and/or mold too cold • Increase nozzle and barrel temperatures • Increase mold temperature • Increase injection rate • Check thermocouples and heater bands Shot size • Increase shot size • Adjust transfer position to 98% full • Increase cushion 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 Brittleness Degraded/overheated material • Decrease melt temperature • Decrease back pressure • Use smaller barrel • Decrease injection speed 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.
https://www.avient.com/sites/default/files/2021-11/artisan-ar7300-pre-colored-formulation-processing-guide.pdf
BASE RESIN ABS Drying Temperature 80–90°C Drying Time 2–3 Hours Barrel Temperatures °C Rear Zone 180–210 Center Zone 190–220 Front Zone 200–230 Nozzle 210–240 Mold Temperature 50–80 Screw Speed Moderate Back Pressure 3–10 bar Cushion 5–15 mm Injection Speed Low to medium Injection Pressure Moderate to high Holding Pressure 10–30% of injection pressure Screw Type General purpose Screw L/D 20:1 Screw Compression Ratio 2.0:1–2.5:1 Non-return Check Valve Free flow check ring Nozzle Type Reverse taper Barrel Capacity 30–80% of barrel should be used STARTUP & SHUTDOWN RECOMMENDATIONS Purge Compound 2–3 melt flow PP or purging compound.
Venting • Place vents at the end of fill and anywhere potential knit/weld lines will occur. • All vents need to be vented to atmosphere. • For circular parts, full perimeter venting is recommended. • Cut vent depths to 0.0007″–0.0015″.
PROBLEM CAUSE SOLUTION Incomplete Fill Melt and/or mold temperature too cold • Increase nozzle and barrel temperatures • Increase mold temperature • Increase injection rate • Check thermocouples and heater bands Shot size • Increase shot size • Adjust transfer position to 98% full • Increase cushion 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 Brittleness Degraded/overheated material • Decrease melt temperature • Decrease back pressure • Use smaller barrel • Decrease injection speed 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.
https://www.avient.com/sites/default/files/2020-12/therma-tech-processing-guide.pdf
Injection Molding Parameters Base Resin PPA PPS PA 6/6 PA 12 Barrel Temperatures °F (°C)* Rear Zone 550–580 (288–305) 550–580 (288–305) 440–490 (227–254) 440–480 (227–250) Center Zone 560–600 (293–316) 560–615 (293–324) 470–510 (243–266) 460–510 (238–266) Front Zone 580–620 (304–327) 590–630 (310–333) 490–540 (254–282) 480–520 (250–271) Nozzle 575–615 (302 –324) 600–625 (316–330) 520–570 (271–300) 500–530 (260–277) Melt Temperature °F (°C) 575–615 (302–324) 600–625 (316–330) 520–570 (271–300) 500–530 (260–277) Mold Temperature °F (°C) 250–300 (121–150) 250–300 (121–150) 150–200 (66–93) 150–200 (66–93) Pack and Hold Pressure 50–80% of Injection Pressure Injection Velocity 1.0–3.0 in/sec Back Pressure 25–100 psi Screw Speed 25–75 rpm Drying Parameters °F (°C) 6 hours @ 175 (80) 6 hours @ 300 (150) 3 hours @ 180 (82) 3 hours @ 180 (82) Cushion 0.125–0.250 in Screw Compression Ratio 2.5:1–3.5:1 2.0:1–2.5:1 2.5:1–3.5:1 2.5:1–3.5:1 Nozzle Type General Purpose General Purpose Reverse Taper Reverse Taper Clamp Pressure 4–5 tons/in2 of projected area of cavities and runner system * Barrel temperatures should be elevated for compounds designed for electrical insulative properties.
Place vents at the end of fill and anywhere potential knit/weld lines will occur. 2.
Maintain a minimum draft angle of 1° per side. 4 Therma-Tech Troubleshooting Recommendations Problem Cause Solution Incomplete Fill Melt and/or mold too cold • Increase nozzle and barrel temperatures • Increase mold temperature • Increase injection rate • Increase pack and hold pressure • Increase nozzle tip diameter • 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 • Increase shot size • Increase cushion • Decrease transfer position Brittleness Low melt temperature • Increase melt temperature • Increase injection rate • Measure melt temperature with pyrometer Degraded/ overheated material • Decrease melt temperature • Decrease back pressure • Use smaller barrel/excessive residence time • Decrease screw rpm Gate location and/or size • Relocate gate to nonstress area • Increase gate size to allow higher flow rate and lower molded in stress Fibers on Surface (Splay) Melt temperature too low • Increase melt temperature • Increase mold temperature • Increase injection speed • Increase screw rpm Insufficient packing • Increase pack and hold pressure, and time • Increase shot size • Increase gate size Processing Guide 5 Problem Cause Solution Sink Marks Part geometry too thick • Reduce wall thickness • Reduce rib thickness • Maintain nominal wall thickness Melt too hot • Decrease nozzle and barrel temperatures • Decrease mold temperature Insufficient material volume • Increase shot size • Increase injection rate • Increase pack pressure/time • Increase gate size Flash Injection pressure too high • Decrease injection pressure • Increase clamp pressure • Decrease injection rate • Increase transfer position Excess material volume • Decrease pack pressure • Decrease shot size • Decrease injection rate Melt and/or mold too hot • Decrease nozzle and barrel temperatures • Decrease mold temperature • Decrease screw speed 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 Troubleshooting Recommendations 6 Therma-Tech Troubleshooting Recommendations Problem Cause Solution Burning Melt and/or mold too cold • Decrease nozzle and barrel temperatures • Decrease mold temperature • Decrease injection rate Mold design • Clean, widen and increase number of vents • Increase gate size or number of gates Moisture • 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 are too low • Increase pack and hold pressure • Increase melt temperature • Increase vent width and locations • Increase injection rate • Increase mold temperature Mold design • Decrease injection rate • 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 rate Mold design • Increase number of gates Sticking in Mold Cavities are overpacked • Decrease injection rate and pressure • Decrease pack and hold pressure • Decrease nozzle and barrel temperatures • Decrease mold temperature • Increase cooling time Mold design • Increase draft angle Part is too hot • Decrease nozzle and barrel temperatures • Decrease mold temperature • Increase cooling time 1.844.4AVIENT www.avient.com Copyright © 2020, Avient Corporation.
https://www.avient.com/industries/consumer/consumer-discretionary/outdoor-recreation/outdoor-adventure-gear
OnForce™ Long Glass Fiber Reinforced Polypropylene Composites
Edgetek™ BIO Natural Filled Formulations
Provided durable and impact-resistant glass fiber reinforced formulation with excellent surface finish and good dimensional stability for smooth operation
https://www.avient.com/sites/default/files/2025-04/OnForce - electronic card reader case study snapshot.pdf
AUTOMOTIVE MOLDER TIER 1 E L E C T R O N I C C A R D R E A D E R P A R T F O R M U L T I M E D I A H U B • Aluminum replacement • Good mechanical properties • PP with 40% Long Glass Fiber • Meet the strict automotive OEM specification • Designed a material solution to obtain all critical mechanical criteria and supply the OEM in a short timeframe • Delivered tailored strategy while offering global reach OnForce Long Fiber Reinforced Thermoplastic Formulations KEY REQUIREMENTS WHY AVIENT?
All Rights Reserved. https://www.avient.com/products/long-fiber-technology/long-fiber-technologies/onforce-long-glass-fiber-reinforced-polypropylene-composites Default Section Slide 1: Automotive Molder tier 1
https://www.avient.com/resources/safety-data-sheets?page=6835
X 41278-0002A GF filled TOPAS
3095-BUA80 PP BLUE MASTERBATCH
PP FR 8-6 LMS-1000
https://www.avient.com/sites/default/files/2022-04/Sustainable Material Answers_ Recycled PET 2022_0.pdf
PET and rPET are also popular options for manufacturers because they are cost-effective materials compared to alternatives like glass and aluminum.
Energy Efficient PET takes less energy to manufacture than alternative materials like glass.
STAGE SOLUTION CAPABILITIES Polymer Recycling ColorMatrix™ rePrize™ - Increases intrinsic viscosity to enhance use of recycled PET - Reduces yellowing and decontamination Materials Selection ColorMatrix™ Joule™ RHB - Reduces the energy required and costs - Ensures minimal yellowing and light-weighting Preform Molding ColorMatrix™ AAzure™ - Reduces yellowing and acetaldehyde levels for improved bottled strength Preform Molding ColorWorks™ - Provides a range of possible colors for end products based on the color of the rPET available for use Preform Molding Rejoin™ PCR Masterbatch - Combines pigments and functional additives with a 100% PCR carrier for polyolefins - Enables packaging that is 100% PCR Bottle Blowing & Filling ColorMatrix™ Optica™ - Excellent acid & thermal stability to reduce yellowing and create a haze-free container Bottle Blowing & Filling ColorMatrix™ Smartheat RHC™ Process Aid - Optimizes weight distribution to increase bottle strength and quality - Reduces energy required and costs Sales, Distribution, Consumption ColorMatrix™ Amosorb™ - Scavenges oxygen to extend the shelf life and preserve the freshness of food or beverages within container Sales, Distribution, Consumption ColorMatrix™ Ultimate™ UV - Blocks ultraviolet light transmission to protect the container and its contents - Enables light-weighting Sales, Distribution, Consumption ColorMatrix™ Lactra™ - High-performance light blocking that extends the shelf life of light-sensitive dairy products Taking the Next Steps Move Your Sustainability to the Next Level Because sustainable material solutions and technology are evolving at the speed of life, it takes fresh thinking, agile R & D, and imaginative use of next-generation materials to bring life-changing products to market safely and quickly.