3D Printing Info

Filament comparison

PA blend vs PA6-CF

Compare printing settings, strength, heat resistance, dated prices and sources.

PA6/66 copolymer blends guideCarbon-fibre PA6 (PA6-CF) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PA blend comparisonsMore PA6-CF comparisons
PA blend vs PA6-CF — documented properties and sources
PropertyPA6/66 copolymer blendsPACarbon-fibre PA6 (PA6-CF)PA
Market snapshot
Listing priceUSD/kg; dated snapshots$65.62/kg median; $62.00–$113.33/kg across 4 dated product listings$62.48/kg median; $39.00–$133.32/kg across 6 dated product listings
Identity & Market
Base polymer / chemistryPA6/66 copolymer — a nylon alloy that lowers the melting point and improves printability against straight PA6[1][2]PA6 reinforced with chopped carbon fibre — Polymaker's grade is 20 wt%[3][4]
Densityg/cm³1.12 (ISO 1183, Polymaker CoPA)[1]1.09 (Bambu Lab), 1.17 (Polymaker Fiberon and 3DXTech), ISO 1183[4][3][5]
Typical priceUSD/kg1 kg-equivalent spools cluster near 65[6][7][8]1 kg-equivalent spools span 39–133; the middle of the market is about 80[4][6][9][10]
Price range across brandsUSD/kg62–113 across brands; add:north Adura 62, PrimaCreator NylonPower PA6/66 65 at 500 g, Polymaker CoPA 67, 3DXTech AmideX Nylon 6-66 113[6][11][7][8]39–133 across brands; IEMAI 3D 39, Bambu Lab 43, YXPOLYER 45, Polymaker Fiberon 80, 3DXTech CarbonX 83, Obsidian 133[4][6][12][11][9][10]
Market availability1–5Available from several mainstream brands[6][11]Stocked by most mainstream brands[4][6][11][12][9][10]
Spool sizes & diameters1.75 and 2.85 mm; 0.5, 0.75 and 1 kg spools[6][11][7][8]1.75 and 2.85 mm; 0.5, 0.75, 1 and 2 kg spools[6][11][4]
Typical applicationsGeneral-purpose nylon parts and, unusually, CoPA can support itself if the support is removed before it absorbs moisture[1]Load-bearing brackets, tooling and drone frames that must hold strength above 150 °C[4][3]
Printing Parameters
Nozzle temperature°C250–270 (Polymaker CoPA)[1]260–290 (Bambu Lab); 280–300 (Polymaker Fiberon)[4][3]
Bed temperature°C25–50 (Polymaker CoPA)[1]40–50 (Polymaker Fiberon)[3]
Enclosure / chamber requirement1–5Enclosure required (passive) — Polymaker specifies a chamber at ambient temperature[1]Enclosure required (passive) — Bambu Lab specifies a 45–60 °C chamber, Polymaker room temperature[4][3]
Recommended chamber temperature°CNot documented45–60 (Bambu Lab); room temperature (Polymaker Fiberon)[4][3]
Bed surface & adhesion aidNot documentedEngineering or high-temperature plate with glue (Bambu Lab)[4]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s16 at Polymaker's 200 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer[1][13]8 at Bambu Lab's 100 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer; Polymaker rates its grade to 300 mm/s[4][3][13]
Bed-adhesion difficulty1–5Not documentedNeeds a specific surface plus adhesive[4]
Stringing / oozing tendency1–5Not documentedModerate — retraction tuning needed[14]
Overall printing difficulty1–5Advanced — enclosure, hardware upgrades, tuning; must be kept below 20 % RH throughout[1][15]Expert / industrial hardware only — enclosure, hardened nozzle, an 80 °C dry and a printer that can hold the filament dry throughout[4][3][15]
Extruder requirementNot documented0.6 mm nozzle recommended by Bambu Lab; 0.4 and 0.8 also supported[4]
Hardware Wear & Reliability
Nozzle hardness required1–4Brass fine indefinitely for unfilled grades[14]Hardened steel required — Polymaker measures brass nozzle life at about 9 h on PA6-CF20 and recommends hardened steel or ruby[3]
Abrasiveness1–5Non-abrasive when unfilled[14]Highly abrasive — standard CF composite; Polymaker puts brass nozzle life at roughly 9 h[3]
Nozzle clog risk1–5Very high — frequent jams without careful setup[16][15]Very high — frequent jams without careful setup; the combination of moisture and fibre is the worst case in the dataset[15][3]
Heat-creep / jam sensitivity1–5Not documentedModerate — good heatbreak cooling needed[17]
Hotend requirementNot documentedHardened steel or ruby nozzle plus an all-metal hot end rated to 300 °C[3][4]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Very high (>2 %) — Polymaker's own wet-state specimens reached 6.16 % moisture content after 48 h immersion at 60 °C[1][15]Very high (>2 %) — 2.35 % saturated at 25 °C / 55 % RH (Bambu Lab)[4]
Equilibrium moisture content at ~50 % RH%Not documented2.35 saturated at 25 °C / 55 % RH (Bambu Lab)[4]
Drying temperature & time100 °C for 8 h (Polymaker CoPA)[1]80 °C for 8–12 h (Bambu Lab); 100 °C for 10 h (Polymaker Fiberon)[4][3]
Symptoms when wetPopping and cracking during extrusion, then hard-to-diagnose defects[16]Popping and cracking during extrusion, then hard-to-diagnose defects[16]
Effect of moisture on strengthMeasured dry against wet on printed specimens at 6.16 % moisture (Polymaker CoPA): tensile 78.0 → 34.3 MPa, Young's modulus 2703 → 724 MPa, flexural strength 109.8 → 22.6 MPa, while notched Charpy rises 6.9 → 27.7 kJ/m² and elongation 12.7 → 13.2 %[1][16]Polymaker publishes dry and wet printed blocks for PA6-CF20 itself: at 5.30 % moisture tensile falls 109.3 → 54.7 MPa and modulus 8636 → 2508 MPa, while notched Charpy rises 11.0 → 35.6 kJ/m². Fibre reinforcement reduces but does not remove the effect[3][16]
Storage requirementPolymaker states CoPA must always be stored and used below 20 % relative humidity[1]Sealed below 20 % RH with desiccant; often needs to stay in a dryer while printing[15]
Hydrolysis at melt temperaturePolymaker requires a 100 °C dry for 8 h and storage below 20 % RH; no molecular-weight loss figure is published, and the published wet data is conditioning rather than melt hydrolysis[1][18]Polymaker specifies an 80–100 °C dry and storage below 20 % RH; no molecular-weight loss figure is published, and the wet data it does publish is conditioning rather than melt hydrolysis[3][1]
Mechanical Properties
Tensile strength (XY)MPa78.0 ± 0.7 printed XY dry and 34.3 ± 2.5 wet, ISO 527 (Polymaker CoPA)[1]102 ± 7 (Bambu Lab) and 109.3 ± 2.4 (Polymaker Fiberon, dry/annealed) printed XY, ISO 527; the Fiberon grade falls to 54.7 ± 1.1 conditioned to 5.30 % moisture; 3DXTech quotes 63 at break[4][3][5]
Young's modulusMPa2703 ± 259 printed XY dry and 724 ± 61 wet, ISO 527 (Polymaker CoPA)[1]4430 ± 310 (Bambu Lab) and 8636 ± 211 (Polymaker Fiberon, dry/annealed) printed XY, ISO 527; Fiberon falls to 2508 ± 83 conditioned; 3DXTech quotes 3800[4][3][5]
Elongation at break%12.7 ± 2.1 printed XY dry and 13.2 ± 2.3 wet, ISO 527 (Polymaker CoPA)[1]5.8 ± 1.6 printed XY, ISO 527 (Bambu Lab); 3DXTech quotes 3 at break[4][5]
Flexural strengthMPa109.8 ± 1.3 printed XY dry and 22.6 ± 0.5 wet, ISO 178 (Polymaker CoPA)[1]161.0 ± 3.9 printed XY dry, 64.9 ± 4.9 conditioned, ISO 178 (Polymaker Fiberon); 3DXTech quotes 84[3][5]
Flexural modulusMPa2510 ± 25 printed XY dry and 636 ± 11 wet, ISO 178 (Polymaker CoPA)[1]7038 ± 205 printed XY dry and 2286 ± 185 conditioned, ISO 178 (Polymaker Fiberon); 3DXTech quotes 3750[3][5]
Charpy impact, notchedkJ/m²6.9 ± 1.4 printed XY dry and 27.7 ± 1.2 wet, ISO 179 notched (Polymaker CoPA) — impact quadruples when conditioned[1]11.0 ± 0.3 printed XY dry and 35.6 ± 1.2 conditioned, ISO 179 notched (Polymaker Fiberon)[3]
Other impact dataNot documentedCharpy unnotched 24.0 ± 1.0 printed XY dry and 73.0 ± 2.0 conditioned, 7.5 ± 2.7 printed Z dry (Polymaker Fiberon); Bambu Lab 40.3 ± 2.5 unnotched, 13.4 ± 1.7 notched[3][4]
Layer adhesion / Z tensileMPa45.8 ± 1.5 printed Z dry, falling to 13.7 ± 1.2 wet, ISO 527 (Polymaker CoPA)[1]48 ± 6 (Bambu Lab) and 54.0 ± 5.2 (Polymaker Fiberon, dry) printed Z, ISO 527; Fiberon falls to 25.5 ± 1.2 conditioned[4][3]
Brittleness1–5Tough — absorbs impact, yields before breaking[1]Moderate[4][3]
Hardness (scale-specific)Shore A / Shore D / RockwellShore D 86 and Rockwell 85 (108) — the source does not name the scales on extruded unfilled PA66 stock (ASTM D2240, D785)[19]Rockwell M88 / R117 on extruded PA66-GF30 stock (ASTM D785); no figure is published for a carbon-fibre nylon filament[20]
Creep resistance / sustained load1–5Not documentedGood. Ensinger rates its PA66-CF30 injection-moulding compound for exceptional performance under both static and dynamic loading with 110 °C continuous service; in a printed part the fibre restrains the matrix, but conditioning to equilibrium moisture still softens it[21][16]
Fatigue / repeated-flex resistance1–5Excellent — living hinges viable[14]Good. Ensinger states its PA66-CF30 compound has improved fatigue strength in tension, flexure and compression against unfilled and glass-filled PA66[21]
Elasticity / flexibility1–5Semi-flexible[16]Rigid[4]
Z strength as % of XY%59 dry (45.8 Z against 78.0 XY) and 40 wet, printed[1]47 (Bambu Lab) to 49 (Polymaker Fiberon), printed[4][3]
Thermal Properties
HDT at 0.45 MPa°C111 (ISO 75, 0.45 MPa, Polymaker CoPA)[1]186 (Bambu Lab) and 215 (Polymaker Fiberon), ISO 75 at 0.45 MPa[4][3]
HDT at 1.8 MPa°C70 (ISO 75, 1.8 MPa, Polymaker CoPA)[1]164 (Bambu Lab) and 173 (Polymaker Fiberon), ISO 75 at 1.8 MPa[4][3]
Glass transition (Tg)°C66 (DSC, Polymaker CoPA)[1]68 (Bambu Lab) to 74.2 (Polymaker Fiberon), DSC; 3DXTech quotes 70[4][3][5]
Melting point / Vicat°C189 melting (DSC); Vicat 180, crystallisation 148, decomposition 370 (Polymaker CoPA)[1]223 melting (Bambu Lab, DSC); Vicat 212 (ISO 306)[4]
Continuous service temperature°CNot documentedBounded by heat deflection of 164–173 °C at 1.8 MPa; no loaded-bar service figure is published[4][3]
Annealing response80 °C for 6 h (Polymaker CoPA)[1]100 °C for 16 h (Polymaker Fiberon)[3]
Thermal expansion (CTE)µm/m·K81.0 on extruded unfilled PA66 stock (ASTM D696; source states 4.5e-5 in/in/°F) — the same chemistry as a PA6/66 copolymer[19]94 in the XY direction and 180 in Z, measured on XY-built specimens (79 and 148 on XZ/ZX-built specimens), room temperature to 60 °C, ASTM E831. From Stratasys FDM Nylon-CF10, a blended-nylon matrix with 10 wt% carbon fibre — the closest published printed CTE for a carbon-fibre nylon[22]
Flammability / UL 94Not documentedFlammable; no UL 94 rating published[3]
Environment & Chemical
UV resistance1–5Not documentedMonths outdoors before embrittlement — unstabilised polyamide yellows and chalks under UV[14]
Chemical resistanceNot documentedWithstands oils, fuels and alkalis[14]
Water / humidity resistance in service1–5Absorbs water, properties shift — 6.16 % uptake cost 56 % of tensile strength and 73 % of modulus[1]Absorbs water, properties shift[16]
Food contactNot documentedNot food-contact certified[14]
Biodegradability / compostabilityNot documentedNot biodegradable[14]
RecyclabilityNot documentedFibre-filled polyamide is not accepted in household plastic collection[14]
Electrical & ESD propertiesNot documentedSurface resistance above 10⁹ ohm/sq — not static-dissipative (3DXTech, ASTM D257)[5]
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[23]Moderate — measurable VOCs and UFPs, ventilation advised[23]
VOC emission rateµg/minUp to 180 caprolactam, the dominant VOC from nylon; total VOC reached nearly 200 µg/min, the highest of the nine filaments tested[23]Up to 180 caprolactam, the dominant VOC from nylon and the largest single-VOC rate in the study[23]
Ultrafine-particle emission rateparticles/min≈2 × 10⁸ median — low for ultrafine particles despite the highest VOC mass of any filament tested[23]≈2 × 10⁸ median for nylon — low for particles despite the highest VOC mass measured[23]
Hazardous species emittedCaprolactam, at up to 180 µg/min from nylon filament — the largest single-VOC emission rate measured in the study[23]Caprolactam, at up to 180 µg/min from nylon filament[23]
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[23]Ventilated room or enclosure recommended[23]
Dust & fibre handling hazardNot documentedFibre is bound in the matrix; sanding dust should not be inhaled[3]
Post-Processing
Sanding & machiningNot documentedSands to a matte finish; the fibre makes it cut more cleanly than unfilled nylon[17]
Gluing & solvent weldingNot documentedCyanoacrylate; no common solvent welds polyamide[17]
Vapour / chemical smoothingNot documentedNo practical vapour smoothing[17]
Support material pairingCoPA can support itself, but Polymaker warns the support bonds permanently if it absorbs moisture before removal[1]PolyDissolve S1 (Polymaker Fiberon)[3]
Dimensional accuracy & detailNot documentedConditioned parts grow; Polymaker declines to publish a standard dimensional allowance because it depends on geometry and infill[16]
Solvents & Solubility
Soluble inDissolved at 23 °C by formic acid above ~50 %, phenol, m-cresol, 96 % sulphuric acid or hexafluoroisopropanol — laboratory reagents.[24]Formic acid, phenol, m-cresol and hexafluoroisopropanol dissolve the matrix at 23 °C, leaving the fibre; laboratory reagents.[24]
Softened or crazed byZinc chloride solutions stress-crack it — 10 % marginal, 37 % not resistant; alcoholic calcium chloride dissolves it.[24]Zinc chloride solutions stress-crack the nylon matrix, alcoholic calcium chloride dissolves it, mineral acids attack it.[24]
Solvent welding & smoothing agentNone — nylon's only solvents are formic acid, phenol and HFIP, all of which degrade the part they wet.[24]None — nylon's only solvents (formic acid, phenol, HFIP) degrade the part, and the fibre blocks surface flow anyway.[24]

Material entries describe families or representative grades, not an interchangeable specification for every spool. Test methods, orientations and conditions may differ. Unknown values are marked “Not documented”. Prices and source dates remain historical snapshots; check the linked guide for product details. Differences highlight text, not a universal winner.

Sources for this comparison

  1. PolyMide CoPA Technical Data Sheet V5.4 (dry and wet status blocks) Polymaker · 2024-11 · tds
  2. AmideX Nylon 6-66 — product page 3DXTech · 2026-08 · vendor
  3. Fiberon PA6-CF20 Technical Data Sheet V1.1 Polymaker · 2024-12 · tds
  4. Bambu Filament Technical Data Sheet — PA6-CF Bambu Lab · 2026-08 · tds
  5. CarbonX Carbon Fiber Nylon (Gen3) Technical Data Sheet v3.0 3DXTech · 2026-08 · tds
  6. Polymaker product catalogue Polymaker · 2026-08 · vendor
  7. add:north Adura product page add:north · 2026-08 · vendor
  8. PrimaCreator SELECT NylonPower PA6/66 product page PrimaCreator · 2026-08 · vendor
  9. YXPOLYER PA6 CF-Black 1 kg — product page YXPOLYER · 2026-08 · vendor
  10. IEMAI 3D CF-PA6 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  11. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  12. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  13. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  14. PA (Nylon) — material basics Polymaker Wiki · 2026-08 · doc
  15. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  16. Moisture Conditioning — effect on printed nylon properties Polymaker Wiki · 2026-08 · doc
  17. Nylon — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  18. PolyMide CoPA — Technical Data Sheet page Polymaker Wiki · 2026-08 · tds
  19. TECAMID 66 natural (PA66) — stock shape properties Ensinger · 2026-08 · tds
  20. TECAMID 66 GF30 black (PA66-GF30) — stock shape properties Ensinger · 2026-08 · tds
  21. TECACOMP PA66 CF30 black — injection-moulding compound Ensinger · 2026-08 · tds
  22. FDM Nylon-CF10 — Material Data Sheet (blended nylon, 10 wt% carbon fibre) Stratasys · 2026-08 · tds
  23. Emissions of Ultrafine Particles and Volatile Organic Compounds from Commercially Available Desktop Three-Dimensional Printers with Multiple Filaments (Azimi et al.) Environmental Science & Technology 50(3) 1260-1268 · 2016-01 · paper
  24. Ultramid Nylon Chemical Resistance guide (unmodified PA6 B27E and PA66 A27E) BASF · 2026-08 · tds