Perfect for Food & Beverage PET and rPET are non-toxic, do not react with foods, and provide thermal insulation. This type of PET is in high demand because changes in the contents of the container that may indicate impurities can be easily detected. These commitments and mandates will continue to drive the high and increasing demand for recycled plastic bottles.

A higher injection velocity is needed when processing Gravi-Tech due to the thermal conductivity of the material. 2. DETERMINING COOLING TIME Step 1 – Part Cooling Time The first step is to calculate the cooling time of the part itself. 2 • TMelt = Temperature of the molten plastics • TCoolant = Thermolator temperature • TEject = Temperature the parts can eject without deforming • H = Thickness (Use thickest portion of part) • α = Thermal diffusivity Thermal diffusivity can be calculated using the equation below k = Thermal Conductivity Constant • ρ = Density • Cρ = Specific Heat Step 2 – Heat Transfer The next step is to calculate the heat transfer rate.

A higher injection velocity is needed when processing Gravi-Tech due to the thermal conductivity of the material. 2. DETERMINING COOLING TIME Step 1 – Part Cooling Time The first step is to calculate the cooling time of the part itself. 2 • TMelt = Temperature of the molten plastics • TCoolant = Thermolator temperature • TEject = Temperature the parts can eject without deforming • H = Thickness (Use thickest portion of part) • α = Thermal diffusivity Thermal diffusivity can be calculated using the equation below k = Thermal Conductivity Constant • ρ = Density • Cρ = Specific Heat Step 2 – Heat Transfer The next step is to calculate the heat transfer rate.

Standard grades in the portfolio conform to UL 94 V-2, V-0 and 5VA performance ratings, and many offer elevated Relative Thermal Index (RTI) ratings. Vents should be placed at the intersection of each 90° bend in the runner system off of the cold slug well and vented to atmosphere Black Specks Contamination • Purge barrel with general purpose PP • Verify correct nozzle is being used • Pull screw for cleaning Degraded/overheated material • Decrease melt temperature • Decrease injection speed • Use appropriately sized barrel Brittleness Degraded/overheated material • Decrease melt temperature • Decrease injection speed • Use appropriately sized barrel Gate location and/or size • Relocate gate to nonstress area • Increase gate size to allow higher flow rate and lower molded-in stress Burning Process related Mold design • Clean, widen and increase number of vents • Increase gate size to reduce shear Fibers/Minerals on Surface or Uneven Surface Appearance Melt temperature too low • Increase injection speed Insufficient packing • Increase hold pressure and time 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 too hot • Decrease screw speed Loose clamp • Reset mold height • Increase clamp tonnage Troubleshooting Recommendations Incomplete Fill Melt and/or mold too cold • Increase nozzle and barrel temperatures 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 Nozzle Drool Nozzle temperature too hot • Decrease nozzle temperature • Increase screw decompression Shrink Too much shrink • Increase cooling time Too little shrink • Decrease cooling time Sink Marks Part geometry too thick • Reduce wall thickness • Reduce rib thickness Melt too hot • Decrease nozzle and barrel temperatures Insufficient material volume • Increase packing pressure Troubleshooting Recommendations (continued) Sticking in Mold Overfilled cavity • Decrease injection rate and pressure • Decrease hold pressure • Decrease cooling time Mold design • Increase draft angle • Polish cores in direction of ejection Part is too hot • Increase cooling time Warp Process related • Increase cooling time • Increase pack pressure • Increase pack time Mold design • Inspect for non-uniform mold cooling Part design • Inspect for non-uniform wall thickness Temperature control unit incorrect temperature • Check settings • Inspect thermocouple 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 1.844.4AVIENT www.avient.com Copyright © 2022, Avient Corporation. You have the responsibility to conduct full-scale end-product performance testing to determine suitability in your application, and you assume all risk and liability arising from your use of the information and/or use or handling of any product.

The build out of the 5G network has just begun and requires a different physical hardware to support the super-high frequency of the technology.  for broadband, including equipment that enables and expands access to high-speed communications throughout the country. Barrier technologies that preserve the shelf-life and quality of food, beverages, medicine and other perishable goods through high-performance materials

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In both cases, our experts helped innovative customers replace metal with specialty polymer formulations that can conduct heat, provide electrical insulation, or conduct electricity,” commented Holger Kronimus, vice president Europe and general manager, Specialty Engineered Materials, Europe for PolyOne.

Add conductive carbon black or graphite to a basic polymer and it will conduct electricity.