https://www.avient.com/sites/default/files/2022-06/Maxxam FR Injection Molding Processing Guide.pdf
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.
https://www.avient.com/sites/default/files/2022-06/Nymax BIO Bio-based Polyamide Solutions Processing Guide.pdf
Reduce back pressure
Machine related 1.
Check for wear on screw, barrel or check ring
Delamination
Process related
1.
https://www.avient.com/sites/default/files/resources/HIGH_PERFORMANCE_CLEAR_THERMOPLASTICS_ELASTOMER.pdf
Test sample is clamped and strain-temperature
relation under constant load is measured.
ANTEC 2003 / 3035
Stress and stain relation of the above four TPE is
shown in Figure 4.
https://www.avient.com/sites/default/files/2024-10/Avient_CodeConduct_2024_NETH2.pdf
Zou u er trots op zijn om het aan uw familie of iemand naar
wie u opkijkt te vertellen?
een bedrijf heeft, of een lid van uw familie heeft een bedrijf, dat u of zij
bezitten of exploiteren en dat zaken wil doen met Avient
• een familielid heeft dat werkt voor een klant of leverancier waarmee u
of een medewerker die aan u rapporteert zakelijke transacties heeft
Proces voor vrijgave
Een belangenverstrengeling is niet altijd duidelijk en gemakkelijk te
herkennen, en het kan onschuldig ontstaan.
Wij willen dat u en uw familie
veilig en gezond zijn.
https://www.avient.com/sites/default/files/2021-06/edgetek-et8900-cr-technical-bulletin.pdf
Whether
you’re designing for high-use, public devices or
everyday home products that need to last longer,
choosing the right material is more important than
ever to minimize disinfectant-related failures, like
cracking and crazing.
https://www.avient.com/sites/default/files/2023-03/Mevopur Healthcare Functional Additives Antistatic Application Bulletin_0.pdf
These antistatic concentrates can be used to increase
the visual appeal of a medical device by avoiding
charge-related dust accumulation.
https://www.avient.com/sites/default/files/2022-02/Sustainability ESG Disclosures_Silicon Dioxide.pdf
CATEGORY DETAIL
EC Number 231-545-4
CAS Number 7631-86-9
Chemical Name Silicon Dioxide (SiO2)
Structural Formula
CHEMICAL IDENTITY
Si
O O
HEALTH EFFECTS
HUMAN HEALTH SAFETY ASSESSMENT
Consumer No human health hazard has been identified relating to this substance.
https://www.avient.com/sites/default/files/2024-03/Cesa Stat Antistatic Additives Product Bulletin.pdf
PRODUCT BULLETIN
KEY CHARACTERISTICS
• Eliminates electric charges to maintain good
product appearance
• Creates safer, static-dissipated parts for
electronics, packaging, automotive, and
military applications
• Improves product appeal by reducing static
charge-related dust accumulation
• Reduces the risk of a potential fire hazard in
product environments
• Reduces cycle times, maximizes throughput,
and lowers operating costs
• Can be combined with other additives or
colorants into a single masterbatch
• Compatible with a variety of processes
including blow molding, injection molding,
extrusion, and film processing
• FDA-approved and bio-based formulations
available
MARKETS AND APPLICATIONS
Cesa Stat Antistatic Additives are suitable for any
thermoplastic application that could benefit from
reduced static buildup, including:
• Automotive under-the-hood components
• Automotive dashboards
• Electrical connectors & components
• Electronic components
• Military components
• Consumer packaging
ARE YOU IN A BATTLE WITH STATIC?
https://www.avient.com/sites/default/files/2023-03/Silcosperse Flame Retardant Additives Product Bulletin %281%29.pdf
STAYING COMPLIANT
With an increasing demand for fire safety, fire-
related legislation and restrictions have become
an expectation.
https://www.avient.com/sites/default/files/2024-05/Cesa Flame Retardant Additives Product Bulletin %281%29.pdf
STAYING COMPLIANT
With an increasing demand for fire safety, new fire-
related legislation and restrictions have become an
expectation.