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FREE LENGTH
DEFLECTION
KEEPER PLATE
BASE CHAIR
NEUTRAL AXIS
1.5 X DIAMETER1.5 X DIAMETER DIAMETER
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https://www.avient.com/sites/default/files/2021-12/PREPERM _ Edgetek Low-loss Dielectric Thermoplastics Technical Bulletin.pdf
KEY PROPERTIES AND PERFORMANCE
FR GRADES H GRADES PEEK GRADES LCP GRADES FLEX GRADES
PROPERTIES CONDITION ISO UNIT PPE400FR PPE700FR PPE950FR PPE1200FR H1500HF H2300HF PEEK700 PEEK900 PEEK1000 PEEK1200 LCP650 LCP800 LCP950 FLX400 FLX700 FLX1100
Dielectric Constant (Dk) 2.4 GHz 4.0 7.0 9.5 12.0 15.0 23.0 7.0 9.0 10.0 12.0 6.5 8.0 9.5 4.0 7.0 11.0
Loss Tangent (Df) 2.4 GHz 0.0030 0.0039 0.0042 0.0045 0.0010 0.0037 0.0024 0.0025 0.0024 0.0027 0.0043 0.0045 0.0047 0.0010 0.0009 0.0012
Density 1183 g/cm3 1.44 1.97 2.20 2.50 2.60 3.40 1.94 2.20 2.30 2.40 2.00 2.15 2.30 1.52 1.93 2.50
Melt Flow Index (MFI) 5 kg, 300 °C
(unless noted) 1113 g/10 min 17 12 13 5 5 8 15 @ 380 °C 13 @ 380 °C 10 @ 380 °C 6 - - - 11 @ 230 °C 2 @ 230 °C 0.3 @ 230 °C
Tensile Strength at Break 23 °C/73 °F 527 MPa 47 52 44 45 23 40 64 62 65 67 75 80 75 11 17 25
Flexural Modulus 23 °C/73 °F 178 MPa 3100 4500 - 9300 2100 5000 6200 7600 9200 11000 8000 8500 8500 1400 1600 2900
Unnotched Izod 23 °C/73 °F 180 kJ/m2 NB 42 20 9 17 10 28 25 18 15 31 20 12 NB NB NB
-20 °C/-4 °F 180 kJ/m2 - - - - 17 10 - - - - - - - - -
Notched Izod 23 °C/73 °F 180 kJ/m2 14 6 4 3 5 4 6 4 4 4 10 6 4 59 23 13
-20 °C/-4 °F 180 kJ/m2 - - - - 5 4 - - - - - - - - - -
STANDARD GRADES RADOME GRADES
PROPERTIES CONDITION ISO UNIT PPE260 PPE300 PPE320 PPE350 PPE400 PPE440 PPE500 PPE650 PPE800 PPE950 PPE1200 RS260 RB260 RS265FR
Dielectric Constant (Dk) 2.4 GHz 2.6 3.0 3.2 3.5 4.0 4.4 5.0 6.5 8.0 9.5 12.0 2.6 2.6 2.7
Loss Tangent (Df) 2.4 GHz 0.0009 0.0009 0.0010 0.0009 0.0009 0.0009 0.0009 0.0009 0.0009 0.0009 0.0010 0.0009 0.0012 0.0032
Density 1183 g/cm3 1.07 1.18 1.21 1.27 1.43 1.50 1.62 1.86 2.10 2.20 2.40 1.06 1.08 1.09
Melt Flow Index (MFI) 5 kg, 300 °C 1113 g/10 min 15 15 16 14 14 14 15 11 10 4 2 21 16 25
Tensile Strength at Break 23 °C/73 °F 527 MPa 40 45 47 50 50 48 45 43 37 37 36 50 42 52
Flexural Modulus 23 °C/73 °F 178 MPa 2700 2400 2000 2600 2800 2700 2600 2600 2300 2600 2600 2200 2200 2600
Unnotched Izod 23 °C/73 °F 180 kJ/m2 NB NB NB NB NB NB NB NB 50 28 24 NB NB NB
-20 °C/-4 °F 180 kJ/m2 NB NB NB NB NB NB NB 50 47 27 25 NB NB NB
Notched Izod 23 °C/73 °F 180 kJ/m2 8 55 69 35 22 20 15 9 8 5 4 19 14 11
-20 °C/-4 °F 180 kJ/m2 8 15 20 14 12 10 9 8 8 5 4 10 12 10
PREPERM™ SERIES
PROPERTIES CONDITION ISO UNIT 8027 8025 8037 8019 8028 8026 8044 8029 8041 8045 8048 8036 8056 8031
Dielectric Constant (Dk) 1 GHz, 23 °C 3.0 3.1 3.4 3.6 3.8 4.4 4.8 5.3 5.4 5.9 6.0 7.0 7.3 9.0
Loss Tangent (Df) 1 GHz, 23 °C 0.0012 0.0012 0.0008 0.0010 0.0010 0.0010 0.0004 0.0008 0.0006 0.0002 0.0006 0.0007 0.0002 0.0007
Density 1183 g/cm3 1.25 1.26 1.35 1.39 1.45 1.59 1.72 1.75 1.79 1.89 1.88 2.06 2.086 2.25
Melt Flow Index (MFI) 5 kg, 300 °C 1113 g/10 min 16 19 10 11 15 13 10 10 15 15 19 10 18 4.7
Tensile Strength at Break 23 °C/73 °F 527 MPa 59 54 54 62 59 54 52 58 52 45 49 45 37 38
Flexural Modulus 23 °C/73 °F 178 MPa 2780 2560 2850 3060 3350 3700 3157 4300 4320 3137 4150 3370 2560 4200
Notched Izod 23 °C/73 °F 180 kJ/m2 15.3 14 14.8 14 12.6 10.4 9.9 8.6 7.4 7.9 6.6 7.1 6.2 6.8
EDGETEK™ 7600 SERIES
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WHEN YOU WORK WITH Avient
From concept to component, you can leverage Avient’s expertise throughout the development cycle in three key
areas: Materials, Processing & Design
DE
SI
GN
MATERIALS
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or visit www.avient.com/composites
Copyright © 2020, Avient Corporation.
https://www.avient.com/sites/default/files/2020-09/surround-processing-guide-2020.pdf
TEMPERATURE
Material Rear
Center
Front
Nozzle
Melt
Mold
Nylon 6,6
540–570
530–560
530–560
540–570
540–570
200–300
(90–150)
Nylon 6,6
30% SS
540–570
530–560
530–560
540–570
540–570
200–300
(90–150)
PBT
510–410
(265–280)
490–540
(255–280)
480–530
480–530
480–530
150–250
(65–120)
PC
14% NiCF
540–570
540–570
530–560
530–560
530–560
150–250
(65–120)
ABS
470–520
460–520
460–520
460–530
(240–275)
460–530
(240–275)
100–200
(40–90)
PP
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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Sink Marks
Melt too hot
Insufficient
material volume
• Increase shot size
• Increase packing pressure
Part geometry
too thick
• Reduce wall thickness
• Reduce rib thickness
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
temperature too hot
Loose clamp
• Reset mold height
• Increase clamp tonnage
Shrink
Too much shrink
• Increase cooling time
Too little shrink
• Decrease cooling time
Burning
• Reduce decompression
• 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 pack and hold pressure
• Increase gate size
• Identify end of fill pattern and verify proper
vent location
• Add vents or increase vent width
• Move gate location
Warp
• Reduce injection speed
• Increase pack pressure
• Increase pack time
• 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
• Decrease cooling time
Part too hot
• Decrease barrel temperature
• Increase cooling time
• 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
• Purge barrel to eliminate material contamination
• Reduce sharp corners in material flow path
• Increase venting
Discoloration
Oversheared material
• Decrease melt temperature
• 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
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