https://www.avient.com/sites/default/files/2021-04/versaflex-hc-bt218-biopharmaceutical-tubing-case-study.pdf
MEDICAL TUBING
EXTRUDER
B I O P H A R M A C E U T I C A L
T U B I N G
• Low leachables & extractables
• Great tensile performance and kink resistance
• Good thermal weldability
• Excellent clarity and medical blue tint
• ISO 10993-4 & 5, USP Class VI & Animal Derivative Free
(ADF)
• Supplied drop-in material replacement to
overcome supply constraints of incumbent TPE
• Offered a lower extractable profile than
comparable materials in the market
• Enabled easy material transition without changes
in tooling or thermal welding machine settings
• Formulated solution with proprietary additives to
provide clarity and prevent yellowing after
sterilization
Versaflex™ HC BT218 Thermoplastic
Elastomer
KEY REQUIREMENTS
WHY AVIENT?
https://www.avient.com/sites/default/files/2025-02/Maxxam_ Polyolefin Formulations- Coaxial Signal Cable Jacket - case study snapshot.pdf
AUTO DATA CABLE
MANUFACTURER
C O A X I A L S I G N A L C A B L E
J A C K E T
• Provide good chemical resistance like that of machine oil
• Pass 3,000 hours aging test of finish goods
• Have low dielectric property - characteristic impedance of
transmission line: 100Ω, capacitance in water: around
102.8pf/m
• Provided excellent performance with low
dielectric constant to make the jacket layer
of signal cables have low capacitance loss
• Offered a solution by combining physical
and chemical foaming products in the
foaming layer to reduce the dielectric
constant further
• Maintained exceptional mechanical
properties under high temperatures
Maxxam Polyolefin Formulations
KEY REQUIREMENTS
WHY AVIENT?
https://www.avient.com/sites/default/files/2023-11/Cesa Clean Product Bulletin.pdf
Cesa™ Clean Additives
WHEN TO USE CESA CLEAN
As a best practice, Cesa Clean adds value when
used for:
• Color changeovers
• Material and formulation changes
• Shutdown or startup
• Machine maintenance
WHY USE CESA CLEAN
Some of the ways you can benefit from
consistently using Cesa Clean:
• Improve production uptime with faster color
changeovers
• Reduce wasted melt puddle material
• Reduce resin use during purging
• Non-abrasive and safe to use on precision
equipment
PRODUCT BULLETIN
Cesa Clean solutions are available for use in a variety of processing conditions and operating temperatures.
https://www.avient.com/sites/default/files/2024-07/TPE Whitepaper_0.pdf
TPE IMPLEMENTATION
CONSIDERATIONS
Through globally established
relationships with toolmakers
and machine producers,
Avient has a comprehensive
understanding of manufacturing
challenges and solutions in this
arena.
If you’re considering a
switch to TPEs, our expert team
can consult on:
• Part design
• Application environment
• Tooling and machine
selection
For additional information on the
opportunities associated with
TPEs, call us at +1.844.4AVIENT
(1.844.428.4368) or visit
avient.com.
https://www.avient.com/sites/default/files/2020-12/artisan-thermoplastics-nylon-processing-guide.pdf
Sink Marks
Melt too hot • Decrease nozzle and barrel temperatures• Decrease mold temperature
Insufficient
material volume
• Adjust transfer position
• Increase shot size
• Increase injection rate
• Increase packing pressure
Part geometry
too thick
• Reduce wall thickness
• Reduce rib thickness
Processing Guide 5
Troubleshooting Recommendations
Problem Cause Solution
Flash
Injection pressure
too high
• Decrease injection pressure
• Increase clamp pressure
• Decrease injection rate
• Increase transfer position
Excess
material volume
• Adjust transfer position
• Decrease pack pressure
• Decrease shot size
• Decrease injection rate
Melt or mold
too hot
• Decrease nozzle and barrel temperatures
• Decrease mold temperature
Loose clamp • Reset mold height• Increase clamp tonnage
Shrink
Too much shrink • Increase cooling time• Decrease mold temperature
Too little shrink • Decrease cooling time • Increase mold temperature
Burning
Process related
• Decrease nozzle and barrel temperatures
• Decrease mold temperature
• Decrease injection rate
• Reduce decompression
Mold design • Clean, widen and increase number of vents• Increase gate size to reduce shear
Wet material • Verify material is dried at proper condition
Nozzle Drool
Nozzle temperature
too hot
• Decrease nozzle temperature
• Decrease back pressure
• Increase screw decompression
• Verify material has been dried at proper conditions
Incorrect nozzle • Use reverse taper tip
Weld Lines
Melt front
temperatures are
too low
• Increase injection rate
• Increase pack and hold pressure
• Increase melt temperature
• Increase mold temperature
Mold design
• Increase gate size
• Identify end of fill pattern and verify proper
vent location
• Add vents or increase vent width
• Move gate location
6 Artisan Pre-Colored Thermoplastics
Problem Cause Solution
Warp
Process related
• Increase melt temp
• Reduce injection speed
• Increase pack pressure
• Increase pack time
• Decrease mold temperature
• Increase cool time
Mold design • Non-uniform mold cooling
Part design • Non-uniform wall thickness
Thermolator incorrect
temperature
• Check settings
• Inspect thermocouple
Sticking in Mold
Overfilled cavity
• Decrease injection rate and pressure
• Decrease hold pressure
• Adjust transfer position
• Decrease nozzle and barrel temperatures
• Decrease mold temperature
• Decrease cooling time
Part too hot
• Decrease barrel temperature
• Decrease mold temperature
• Increase cooling time
Mold design • Increase draft angle • Polish cores in direction of ejection
Black Specks
Contamination • Purge machine
Degradation
• Reduce melt temperature
• Reduce screw speed
• Reduce back pressure
Machine related • Check for wear on screw, barrel or check ring
Delamination
Process related
• Increase melt temperature
• Decrease injection speed
• Purge barrel to eliminate material contamination
Mold design • Reduce sharp corners in material flow path • Increase venting
Troubleshooting Recommendations
Processing Guide 7
Troubleshooting Recommendations
Problem Cause Solution
Discoloration
Oversheared
material
• Decrease melt temperature
• Decrease injection speed
• Reduce residence time
Mold design • Increase gate sizing
Dry material • Check moisture of material to ensure it is within the recommended moisture percentage for molding
1.844.4AVIENT
www.avient.com
Copyright © 2020, Avient Corporation.
https://www.avient.com/sites/default/files/2021-11/artisan-ar7300-pre-colored-formulation-processing-guide.pdf
Sink Marks
Melt too hot
• Decrease nozzle and barrel temperatures
• Decrease mold temperature
Insufficient
material volume
• Adjust transfer position
• Increase shot size
• Increase injection rate
• Increase packing pressure
Part geometry
too thick
• Reduce wall thickness
• Reduce rib thickness
TROUBLESHOOTING RECOMMENDATIONS
PROBLEM CAUSE SOLUTION
Flash
Injection pressure
too high
• Decrease injection pressure
• Increase clamp pressure
• Decrease injection rate
• Increase transfer position
Excess
material volume
• Adjust transfer position
• Decrease pack pressure
• Decrease shot size
• Decrease injection rate
Melt and/or mold
temperature too hot
• Decrease nozzle and barrel temperatures
• Decrease mold temperature
Loose clamp
• Reset mold height
• Increase clamp tonnage
Shrink
Too much shrink
• Increase cooling time
• Decrease mold temperature
Too little shrink
• Decrease cooling time
• Increase mold temperature
Burning
Process related
• Decrease nozzle and barrel temperatures
• Decrease mold temperature
• Decrease injection rate
• Reduce decompression
Mold design
• Clean, widen and increase number of vents
• Increase gate size to reduce shear
Wet material • Verify material is dried at proper condition
Nozzle Drool
Nozzle temperature
too hot
• Decrease nozzle temperature
• Decrease back pressure
• Increase screw decompression
• Verify material has been dried at proper conditions
Incorrect nozzle • Use reverse taper tip
Weld Lines
Melt front
temperatures are
too low
• Increase injection rate
• Increase pack and hold pressure
• Increase melt temperature
• Increase mold temperature
Mold design
• Increase gate size
• Identify end of fill pattern and verify proper
vent location
• Add vents or increase vent width
• Move gate location
TROUBLESHOOTING RECOMMENDATIONS
PROBLEM CAUSE SOLUTION
Warp
Process related
• Increase melt temperature
• Reduce injection speed
• Increase pack pressure
• Increase pack time
• Decrease mold temperature
• Increase cool time
Mold design • Non-uniform mold cooling
Part design • Non-uniform wall thickness
Thermolator incorrect
temperature
• Check settings
• Inspect thermocouple
Sticking in Mold
Overfilled cavity
• Decrease injection rate and pressure
• Decrease hold pressure
• Adjust transfer position
• Decrease nozzle and barrel temperatures
• Decrease mold temperature
• Decrease cooling time
Part too hot
• Decrease barrel temperature
• Decrease mold temperature
• Increase cooling time
Mold design
• Increase draft angle
• Polish cores in direction of ejection
Black Specks
Contamination • Purge machine
Degradation
• Reduce melt temperature
• Reduce screw speed
• Reduce back pressure
Machine related • Check for wear on screw, barrel or check ring
Delamination
Process related
• Increase melt temperature
• Decrease injection speed
• Purge barrel to eliminate material contamination
Mold design
• Reduce sharp corners in material flow path
• Increase venting
TROUBLESHOOTING RECOMMENDATIONS
PROBLEM CAUSE SOLUTION
Discoloration
Oversheared material
• Decrease melt temperature
• Decrease injection speed
• Reduce residence time
Mold design • Increase gate sizing
Dry material
• Check moisture of material to ensure it is within the
recommended moisture percentage for molding
TROUBLESHOOTING RECOMMENDATIONS
1.844.4AVIENT
www.avient.com
Copyright © 2021, Avient Corporation.
https://www.avient.com/sites/default/files/resources/NOVEL_THERMOPLASTIC_ELASTOMERS_FOR_UNIVERSAL_OVERMOLDING_ON_DISSIMILAR_THERMOPLASTICS.pdf
Injection Molding of Plaques
A Milacron injection molding machine was used to prepare plaques for the measurements of
physical properties and adhesion.
The barrel temperature of the
injection molding machine was set from 180°C to 220°C (360°F to 430°F) and the injection velocity
from 0.7 inch/sec to 2.0 inch/sec.
https://www.avient.com/industries/packaging/food-packaging/condiments
Coffee Machine Seal
Guide to part design, mold design, hot runner systems, overmolding, machine selection, material handling and preparation, processing conditions and troubleshooting for GLS™ solutions
Reduce movement of top load washing machines with TPEs for anti-vibration feet
https://www.avient.com/industries/packaging/food-packaging/shelf-stable-food
Coffee Machine Seal
Guide to part design, mold design, hot runner systems, overmolding, machine selection, material handling and preparation, processing conditions and troubleshooting for GLS™ solutions
Reduce movement of top load washing machines with TPEs for anti-vibration feet
https://www.avient.com/industries/consumer/consumer-discretionary/outdoor-recreation/exercise-fitness
Cash Machine Tray
Coffee Machine Seal
Reduce movement of top load washing machines with TPEs for anti-vibration feet