https://www.avient.com/sites/default/files/2020-09/surround-processing-guide-2020.pdf
TEMPERATURE
Material
Rear
°F (°C)
Center
°F (°C)
Front
°F (°C)
Nozzle
°F (°C)
Melt
°F (°C)
Mold
°F (°C)
Nylon 6,6
14% NiCF
540–570
(280–300)
530–560
(275–290)
530–560
(275–290)
540–570
(280–300)
540–570
(280–300)
200–300
(90–150)
Nylon 6,6
30% SS
540–570
(280–300)
530–560
(275–290)
530–560
(275–290)
540–570
(280–300)
540–570
(280–300)
200–300
(90–150)
PBT
14% NiCF
510–410
(265–280)
490–540
(255–280)
480–530
(250–275)
480–530
(250–275)
480–530
(250–275)
150–250
(65–120)
PC
14% NiCF
540–570
(280–300)
540–570
(280–300)
530–560
(275–290)
530–560
(275–290)
530–560
(275–290)
150–250
(65–120)
ABS
14% NiCF
470–520
(240–270)
460–520
(240–270)
460–520
(240–270)
460–530
(240–275)
460–530
(240–275)
100–200
(40–90)
PP
14% NiCF
440–480
(225–250)
440–480
(225–250)
430–470
(220–245)
420–460
(215–240)
420–460
(215–240)
125–175
(50–80)
DRYING
Material
Temperature
°F (°C)
Time
Minimum
Moisture
Maximum
Moisture
Nylon 6,6
14% NiCF
180 (80) 4–5 hours 0.05% 0.20%
Nylon 6,6
30% SS
180 (80) 4–5 hours 0.05% 0.20%
PBT
14% NiCF
250 (120) 6-8 hours 0.02% 0.03%
PC
14% NiCF
250 (120) 3–4 hours 0.02% 0.02%
ABS
14% NiCF
200 (90) 2–4 hours 0.05% 0.10%
PP
14% NiCF
180 (80) 2–4 hours 0.20% 0.30%
Equipment
• Feed throats smaller than 2.5" may cause bridging due to pellet size
- Larger feed throats will be more advantageous with long fiber EMI shielding resins
• General purpose metering screw is recommended
- Mixing/barrier screws are not recommended
• L/D ratio
- 18:1–20:1 (40% feed, 40% transition, 20% metering)
• Low compression ratio
- 2:1–3:1
• Deep flights recommended
- Metering zone 3.5 mm
- Feed zone 7.5 mm
• Check ring
- Three-piece, free-flowing check ring
• General purpose nozzle (large nozzle tips are recommended)
- Minimum orifice diameter of 7/32"
- Tapered nozzles are not recommended for long fiber EMI shielding resins
• Clamp tonnage:
- 2.5–5 tons/in2
Gates
• Large, free-flow gating recommended
- 0.25" x 0.125" land length
- 0.5" gate depth
Runners
• Full round gate design
• No sharp corners
• Minimum of 0.25" diameter
• Hot runners can be used
PROCESSING
Screw Speed Slower screw speeds are recommended to protect fiber length
Back Pressure Lower back pressure is recommended to protect fiber length
Pack Pressure 60–80% of max injection pressure
Hold Pressure 40–60% of max injection pressure
Cool Time 10–30 seconds (depends on part geometry and dimensional stability)
PROCESS CONSIDERATIONS
Recommended – retain fiber length (maximize conductivity)
• Low shear process
• Low screw speed and screw RPM
• Slow Injection speed
• Fill to 99–100% on first stage of injection
- Reduces potential nesting of fibers at gate location
- Improves mechanical performance near gate location
- Promotes ideal fiber orientation
Resin Rich Surface
• Achieved when using a hot mold temperature and longer cure times
≥ Max mold temperature recommendation
• Improved surface aesthetic
• Reduced surface conductivity
• Could reduce attenuation performance in an assembly
Fiber Rich Surface
• Achieved when using a cold mold temperature and shorter cure times
≤ Minimum mold temperature recommendation
• Improved surface aesthetic
• Reduced surface conductivity
• Could improve attenuation performance in an assembly
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Copyright © 2020, Avient Corporation.
https://www.avient.com/sites/default/files/2020-10/tpes-for-automotive-fasteners-clips-product-bulletin-1.pdf
ONFLEX™ HT ONFLEX™ AF 7210 ONFLEX™ S KA ONFLEX™ S KG
Applications
Fasteners/
Clips
Fasteners/
Clips
Fasteners/
Clips
Fasteners/
Clips
Defining Characteristic
High temperature
sealing
performance
Ambient
temperature sealing
performance
High temperature
sealing
performance
Ambient
temperature sealing
performance
Density 1.00 g/ml 0.99 g/ml 1.10 g/ml 1.13 g/ml
Physical Properties
Tensile Strength 6.0–10.0 MPa 5.0–11.5 MPa 3.0–7.5 MPa 2.6–4.9 MPa
Tear Resistance 25.0–37.0 kN/m 21.0–43.0 kN/m 17.0–46.0 kN/m 16.0–29.0 kN/m
Compression Set
73°F (23°C) 72hrs 12–27% 16–32% 13–23% 31–35%
158°F (70°C) 22hrs 28–44% 32–43% 29–38% 62–66%
212°F (100°C) 22hrs 45–53% 56–60% 54–57% 80–85%
Hardness 40–80 Shore A 40–80 Shore A 40–80 Shore A 40–80 Shore A
Overmolding Substrate
Polypropylene/
Polyethylene
Polypropylene Polyamide Polyamide
Processing
Injection Molding/
Extrusion
Injection Molding/
Extrusion
Injection Molding/
Extrusion
Injection Molding/
Extrusion
HOW GLS TPEs MAKE THE DIFFERENCE IN AUTOMOTIVE FASTENERS AND CLIPS
• Low compression set – coupled with good
stress relaxation, our automotive TPEs are
designed to maintain a good seal over time and
reduce noise generated by vibration
• High temperature performance – Avient
automotive TPEs provide good sealing
performance in temperatures up to
100°C/212°F
• Bonding performance - strong chemical bond
to polypropylene, polyethylene,
and polyamide
• Process flexibility - grades can be both
injection molded and extruded
• Easy to color - can be colored at the machine
• Reduced production steps - some grades do
not require pre-drying
• Low VOC/FOG - OnFlex HT™ has been externally
tested to VDA 278 and is proven to help satisfy
vehicle interior air quality (VIAQ) regulatory
requirements
• Single source supply – we can streamline your
supply chain with the ability to provide polymer
colorants, engineered thermoplastics, and
thermoplastic elastomers from a single source
• Global support - we provide production,
technical, and commercial support in locations
convenient to your operations, including North
America, Europe, and Asia
To learn more about GLS TPEs for automotive
applications, visit www.avient.com or call
+1.844.4AVIENT (1.844.428.4368).
https://www.avient.com/products/engineered-polymer-formulations/general-engineered-formulations/nymax-bergamid-polymer
Injection molding parameters and troubleshooting recommendations for the the Nymax™ prime and Nymax™ REC recycled nylon materials
Comprehensive guide for designing molded parts with Nymax nylon formulations
https://www.avient.com/products/engineered-polymer-formulations/conductive-signal-radiation-shielding-formulations/therma-tech-thermally-conductive-formulations
Injection molding parameters, startup and shutdown, mold design and troubleshooting recommendations for Therma-Tech™ Thermally Conductive Formulations
https://www.avient.com/idea/could-polyketone-be-next-generation-nylon-alternative
The difference in moisture uptake is also evident in property change between samples tested dry as molded compared to equilibrium conditioned, as shown in the chart above.
If the material is allowed to stay in an injection molding machine or extruder (profile, sheet, etc.) too long, the material will start to discolor and brown ‘freckles’ may appear.
https://www.avient.com/products/polymer-additives
Colorant Chromatics™ Evoluscend™ Non-PFAS High-Temperature Mold Release Additive
Colorant Chromatics™ Evoluscend™ Non-PFAS High-Temperature Mold Release Additive
https://www.avient.com/news/avient-launches-new-recycled-content-thermoplastic-elastomers-and-metallic-effect-sulfone-solutions-fakuma-2024
RECENTLY LAUNCHED Colorant Chromatics™ Evoluscend™ Non-PFAS High-Temperature Mold Release Additive: formulated without intentionally added per- and polyfluoroalkyl substances (PFAS), this new non-PFAS additive can be used to enhance the manufacturing processes of high-pressure injection molding (link to full press release here).
https://www.avient.com/news/avient-present-broad-array-innovative-and-sustainable-materials-solutions-chinaplas-2025
Solutions to help reduce carbon footprint by lightweighting using recycled materials in injection molded and extruded applications for automotive and consumer goods industries, such as Hydrocerol™ Chemical Foaming Agents developed to reduce material consumption, part weight, and cycle times while maintaining excellent surface finish and eliminating sink marks, and can also serve as nucleating additives in direct gassing foam extrusion processes
Colorant Chromatics™ Conductive Formulations: for controlled dispersion and high-quality carbon black to enable high-temperature extrusion and molding processes with higher line speed and no drool for critical applications in the petroleum and the chemical processing industry.
https://www.avient.com/industries/packaging/beverage-packaging/beverage-packaging-dairy
GLS™ TPEs - Injection Molding Guide
Guide to overmolding material selection, part and mold design, material handling and preparation, TPE injection molding, processing, maximizing adhesion and troubleshooting for GLS™ TPEs
Provided easy injection molding process and pass durability test with good wear resistance
https://www.avient.com/products/polymer-additives/surface-modifier-additives/oncap-anti-fogging-additives
Reusable concentrates significantly reduce time spent cleaning extrusion and injection molding equipment.