https://www.avient.com/sites/default/files/2024-03/Nymax _ Nymax REC Processing Guide.pdf
NYMAX™ POLYMER
FORMULATIONS
PRIME & RECYCLED
NYLON THERMOPLASTICS
PROCESSING GUIDE
2 Nymax Polymer Formulations
Nymax™ and Nymax™ REC Formulations
Nymax™ thermoplastics include prime and recycled nylon formulations in both unfilled grades and
with various levels of glass fiber and mineral reinforcements.
Place vents at the end of fill and anywhere potential knit/weld lines
will occur.
2.
Additional draft may be required
for grained/textured surfaces.
4 Nymax Polymer Formulations
Incomplete Fill
Melt and/or mold
too cold
• Increase nozzle and barrel temperatures
• 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
• Adjust transfer position to 98% full
• Increase cushion
Brittleness
Wet material
• Check moisture.
https://www.avient.com/sites/default/files/2023-05/LFT Application Development Center Bulletin.pdf
glass, carbon, etc
These tools include mold-filling
simulations to study fill patterns (including predicted
pack and cooling) of the geometry and predict knit
line locations at resin flow fronts to help ensure you
are directing the best fiber alignment (strength) in
the highest stress areas that your product endures
when in use.
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
Incomplete Fill
Melt and/or mold
too cold
• Increase nozzle and barrel temperatures
• 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 cushion
• Decrease transfer position
Brittleness
Low melt
temperature
• 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 injection speed
• Increase screw rpm
Insufficient packing
• Increase pack and hold pressure, and time
Processing Guide 5
Sink Marks
Part geometry
too thick
• Reduce wall thickness
• Reduce rib thickness
• Maintain nominal wall thickness
Melt too hot • Decrease nozzle and barrel temperatures
Insufficient
material volume
• Increase pack pressure/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
Excessive Shrink Too much
orientation
• Increase packing time and pressure
• Increase hold pressure
• Decrease melt temperature
• Decrease injection speed
• Decrease screw rpm
• Increase venting
Not Enough Shrink Too little
orientation
• Decrease packing pressure and time
• Decrease hold pressure
• Increase injection speed
• Increase screw rpm
• Decrease cooling time
6 Therma-Tech
Burning
Melt and/or mold
too cold
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 vent width and locations
Mold design
• 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
• 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
Mold design • Increase draft angle
Part is too hot
1.844.4AVIENT
www.avient.com
Copyright © 2020, Avient Corporation.
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?
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/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
Incomplete Fill
Melt and/or mold
too cold
• Increase nozzle and barrel temperatures
• 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
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/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,
ColorMatrix™ Amosorb™ - Scavenges oxygen to extend the shelf life and preserve the
freshness of food or beverages within container
Sales, Distribution,
ColorMatrix™ Ultimate™ UV - Blocks ultraviolet light transmission to protect the container
and its contents
- Enables light-weighting
Sales, Distribution,
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.
https://www.avient.com/sites/default/files/2024-10/Hydrocerol Chemical Foaming Agents Brochure.pdf
Grades are
available for polyolefins, PP, PC/ABS, ABS, PA6—
filled and reinforced polymers included—and
others on request.
Extrusion-specific concentrates are available for
most common packaging resins, including PP, PE,
PS, PET, and PLA.
https://www.avient.com/sites/default/files/2024-08/Automotive General Design Technology Guide.pdf
COLOR EFFECTS SUGGESTED
(please click on link below
IP Components
Door Trim
Console
Seat Back Panel
Talc-Filled PP/
TPO
Metallic
Metallic
(larger flakes - mimics paint)
Granite
Granite
(specks)
Marble
Lower Pillars
Quarter Trim Panel
Seat Side Shield
PP (unfilled)
Granite
Granite
(specks)
OnColor REC Colorants
(seat shields)
Marble
Upper Pillar Trim
Grab Handles
Headliner
TPO
Bright Colors
(grab handles)
Granite
(fibers - minimal pillars)
Shifter Knobs TPU
Metallic
Laser Marking
Granite
Marble
COLOR EFFECTS SUGGESTED
(please click on link below
Door Trim Pull Cup
Console Cupholder Bezels
Console Decorative Bezels/
Trim Rings
ABS
Metallic
(bright chromatic colors)
Metallic
Marble
Laser Marking
(pattern on metallic)
Shade Mirrors
Rearview Mirror
Overhead Console
Bin Tray
PC+ABS
Marble
Granite
Headrest Guides HDPE Metallic
Bin & Pullcup Mats
Cupholders
Overmolding
TPE
Laser Marking
Marble
Granite
Sun Visor Vanity Frame
Door Handle Bezels
Switch Bezels
Armrest Pullcup
GF PA Metallic
A/C Vent Vanes
Door Handle
Seat Handle
Carpet Clips
GF PA
Metallic
Granite
COLOR EFFECTS SUGGESTED
(please click on link below
Lower Pillars
Quarter Trim Panel
Seat Side Shield
POM
Metallic
Metallic
Granite
Bezels
Lenses
PMMA Translucent/Tint/Fluorescent
Bezels
Lenses
ASA Light Diffusion
Exterior Badging
Exterior Mirrors
ASA
Metallic
Laser Marking
Metallic
1.844.4AVIENT
www.avient.com
Copyright © 2024, Avient Corporation.
https://www.avient.com/idea/auto-parts-maker-gets-peak-production-new-approach
Its customer, a luxury European automaker, was buying radiator shrouds that the molder made from a black talc-filled polypropylene on a single-cavity injection system.
Spikes in production were great for the molder’s bottom line, but sometimes the increased demand outstripped its ability to fill orders.
The additive concentrate not only reduced cycle times as expected, it allowed the supplier to achieve better flow and mold filling.
https://www.avient.com/sites/default/files/2020-08/color-fabric-fx-product-bulletin-8.5x11.pdf
KEY CHARACTERISTICS
• Fabric FX can be formulated to include properties
such as UV color protection and anti-scratch
performance
• Fabric FX can be processed on standard molding
machinery
• Different matrix materials can be enhanced with
Fabric FX, including ABS, PC/ABS, PB, and unfilled
or talc-filled PP
• There is no limitation on the graining that can be
used; the fabric effect will differ depending on the
grain effect engraved in the tool
• If parts are extruded or a mold is not engraved,
final parts will have an attractive speckled
appearance, but will not be textured
TYPICAL USES
Fabric FX concentrates are suitable for any application
that could benefit from an enhanced textile-like
appearance.