3D Printing Info

Filament comparison

PA6-CF vs PLA-GF

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

Carbon-fibre PA6 (PA6-CF) guideGlass-fibre PLA (PLA-GF) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PA6-CF comparisonsMore PLA-GF comparisons
PA6-CF vs PLA-GF — documented properties and sources
PropertyCarbon-fibre PA6 (PA6-CF)PAGlass-fibre PLA (PLA-GF)PLA
Market snapshot
Listing priceUSD/kg; dated snapshots$62.48/kg median; $39.00–$133.32/kg across 6 dated product listings$44.99/kg median; $29.99–$59.99/kg across 2 dated product listings
Identity & Market
Base polymer / chemistryPA6 reinforced with chopped carbon fibre — Polymaker's grade is 20 wt%[1][2]PLA filled with chopped glass fibre — 12 wt% (Polymaker HT-PLA-GF), 15–20 wt% (eSUN PLA-GF). Bambu Lab PLA Galaxy uses glass microspheres, not fibre, and is not equivalent[3][4][5]
Densityg/cm³1.09 (Bambu Lab), 1.17 (Polymaker Fiberon and 3DXTech), ISO 1183[2][1][6]1.31 (eSUN) to 1.337 (Polymaker), ISO 1183 / GB/T 1033[3][4]
Typical priceUSD/kg1 kg-equivalent spools span 39–133; the middle of the market is about 80[2][7][8][9]1 kg spools cluster near 30[10][11]
Price range across brandsUSD/kg39–133 across brands; IEMAI 3D 39, Bambu Lab 43, YXPOLYER 45, Polymaker Fiberon 80, 3DXTech CarbonX 83, Obsidian 133[2][7][12][13][8][9]30–60 across brands; Polymaker 30, Proto-pasta 60[10][11]
Market availability1–5Stocked by most mainstream brands[2][7][13][12][8][9]Niche, a handful of specialist brands[10][11][4]
Spool sizes & diameters1.75 and 2.85 mm; 0.5, 0.75, 1 and 2 kg spools[7][13][2]1.75 mm; 0.5 and 1 kg spools[11][7]
Typical applicationsLoad-bearing brackets, tooling and drone frames that must hold strength above 150 °C[2][1]Stiff brackets and fixtures; the Polymaker grade is aimed at parts annealed for heat resistance[3]
Printing Parameters
Nozzle temperature°C260–290 (Bambu Lab); 280–300 (Polymaker Fiberon)[2][1]210–230 (Polymaker HT-PLA-GF)[3]
Bed temperature°C40–50 (Polymaker Fiberon)[1]25–60 (Polymaker HT-PLA-GF)[3]
Enclosure / chamber requirement1–5Enclosure required (passive) — Bambu Lab specifies a 45–60 °C chamber, Polymaker room temperature[2][1]Open frame is fine[3]
Recommended chamber temperature°C45–60 (Bambu Lab); room temperature (Polymaker Fiberon)[2][1]Not documented
Part cooling fanNot documentedFan on — eSUN specifies 100 %[4]
Bed surface & adhesion aidEngineering or high-temperature plate with glue (Bambu Lab)[2]Not documented
Maximum volumetric flow (mm³/s; see test conditions)mm³/s8 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[2][1][14]28 at Polymaker's stated 350 mm/s on a 0.4 mm nozzle at 0.2 mm layer; eSUN prints its specimens at 60 mm/s[3][4][14]
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[2]Not documented
Stringing / oozing tendency1–5Moderate — retraction tuning needed[15]Not documented
Shrinkage%Not documented0.05 in X-Y and Z, 0.10 diagonal (Polymaker HT-PLA-GF)[3]
Overall printing difficulty1–5Expert / industrial hardware only — enclosure, hardened nozzle, an 80 °C dry and a printer that can hold the filament dry throughout[2][1][16]Intermediate — dry filament and a tuned profile; hardened nozzle mandatory[3]
Extruder requirement0.6 mm nozzle recommended by Bambu Lab; 0.4 and 0.8 also supported[2]Not documented
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — Polymaker measures brass nozzle life at about 9 h on PA6-CF20 and recommends hardened steel or ruby[1]Hardened steel required[3]
Abrasiveness1–5Highly abrasive — standard CF composite; Polymaker puts brass nozzle life at roughly 9 h[1]Highly abrasive — standard GF composite[3]
Nozzle clog risk1–5Very high — frequent jams without careful setup; the combination of moisture and fibre is the worst case in the dataset[16][1]Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[17]
Heat-creep / jam sensitivity1–5Moderate — good heatbreak cooling needed[18]Not documented
Hotend requirementHardened steel or ruby nozzle plus an all-metal hot end rated to 300 °C[1][2]Hardened steel or ruby nozzle; Polymaker's own slicer preset sets a minimum nozzle hardness of 40 HRC[3]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Very high (>2 %) — 2.35 % saturated at 25 °C / 55 % RH (Bambu Lab)[2]Moderate — the PLA matrix takes up 0.40–0.51 % saturated; no glass-filled grade publishes its own figure[19][20]
Equilibrium moisture content at ~50 % RH%2.35 saturated at 25 °C / 55 % RH (Bambu Lab)[2]Not documented
Drying temperature & time80 °C for 8–12 h (Bambu Lab); 100 °C for 10 h (Polymaker Fiberon)[2][1]60 °C for 6 h (Polymaker HT-PLA-GF)[3]
Symptoms when wetPopping and cracking during extrusion, then hard-to-diagnose defects[21]Not documented
Effect of moisture on strengthPolymaker 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[1][21]Polymaker rates PLA low-sensitivity and publishes no dry-versus-conditioned figures for this grade; absorbed water flashes to steam and shows as bubbling and poor layer adhesion[16]
Storage requirementSealed below 20 % RH with desiccant; often needs to stay in a dryer while printing[16]Not documented
Hydrolysis at melt temperaturePolymaker 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[1][22]Not documented
Mechanical Properties
Tensile strength (XY)MPa102 ± 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[2][1][6]50.1 as printed and 50.2 annealed, printed XY, ISO 527 (Polymaker); eSUN quotes 59.3 by GB/T 1040[3][4]
Young's modulusMPa4430 ± 310 (Bambu Lab) and 8636 ± 211 (Polymaker Fiberon, dry/annealed) printed XY, ISO 527; Fiberon falls to 2508 ± 83 conditioned; 3DXTech quotes 3800[2][1][6]3794 as printed, 4207 annealed, printed XY, ISO 527 (Polymaker)[3]
Elongation at break%5.8 ± 1.6 printed XY, ISO 527 (Bambu Lab); 3DXTech quotes 3 at break[2][6]2.77 as printed, 2.3 annealed, printed XY, ISO 527 (Polymaker); eSUN quotes 7.99[3][4]
Flexural strengthMPa161.0 ± 3.9 printed XY dry, 64.9 ± 4.9 conditioned, ISO 178 (Polymaker Fiberon); 3DXTech quotes 84[1][6]86.4 printed XY, ISO 178 (Polymaker)[3]
Flexural modulusMPa7038 ± 205 printed XY dry and 2286 ± 185 conditioned, ISO 178 (Polymaker Fiberon); 3DXTech quotes 3750[1][6]3685 printed XY, ISO 178 (Polymaker); eSUN quotes 4415 flexural modulus by GB/T 9341[3][4]
Charpy impact, notchedkJ/m²11.0 ± 0.3 printed XY dry and 35.6 ± 1.2 conditioned, ISO 179 notched (Polymaker Fiberon)[1]5.31 ± 0.46 as printed and 4.92 ± 0.50 annealed (printed XY, ISO 179, notched); Z 4.28 ± 0.18[3]
Other impact dataCharpy 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[1][2]Izod 10.16 kJ/m² (eSUN, GB/T 1843)[4]
Layer adhesion / Z tensileMPa48 ± 6 (Bambu Lab) and 54.0 ± 5.2 (Polymaker Fiberon, dry) printed Z, ISO 527; Fiberon falls to 25.5 ± 1.2 conditioned[2][1]23.7 as printed, 22.5 annealed, printed Z, ISO 527 (Polymaker)[3]
Brittleness1–5Moderate[2][1]Very brittle — elongation at break 2.77 % in XY and 0.85 % in Z[3]
Hardness (scale-specific)Shore A / Shore D / RockwellRockwell M88 / R117 on extruded PA66-GF30 stock (ASTM D785); no figure is published for a carbon-fibre nylon filament[23]Not documented
Creep resistance / sustained load1–5Good. 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[24][21]Poor — no GF-grade creep test; plain printed PLA sagged from 12 to 16.2–21.8 mm over 5 days at 1.25 kg[25][26][27]
Fatigue / repeated-flex resistance1–5Good. Ensinger states its PA66-CF30 compound has improved fatigue strength in tension, flexure and compression against unfilled and glass-filled PA66[24]Poor — no grade-specific S-N curve; plain printed PLA ran 38 000–49 000 cycles at 30 % of tensile strength and elongation at break falls to 2.77 % in XY and 0.85 % in Z[28][3]
Elasticity / flexibility1–5Rigid[2]Rigid[3]
Z strength as % of XY%47 (Bambu Lab) to 49 (Polymaker Fiberon), printed[2][1]47 as printed (23.7 Z against 50.1 XY), printed[3]
Wear resistance & frictionNot documentedeSUN describes high wear resistance and positions the grade for wear parts[4]
Thermal Properties
HDT at 0.45 MPa°C186 (Bambu Lab) and 215 (Polymaker Fiberon), ISO 75 at 0.45 MPa[2][1]75.5 as printed, 114.7 after annealing (ISO 75, 0.45 MPa) — the point of the material[3]
HDT at 1.8 MPa°C164 (Bambu Lab) and 173 (Polymaker Fiberon), ISO 75 at 1.8 MPa[2][1]59.7 as printed, 84 after annealing (ISO 75, 1.8 MPa)[3]
Glass transition (Tg)°C68 (Bambu Lab) to 74.2 (Polymaker Fiberon), DSC; 3DXTech quotes 70[2][1][6]59.8 (DSC)[3]
Melting point / Vicat°C223 melting (Bambu Lab, DSC); Vicat 212 (ISO 306)[2]174.9 peak melt (DSC); Vicat 148.9 as printed, 148.3 annealed[3]
Continuous service temperature°CBounded by heat deflection of 164–173 °C at 1.8 MPa; no loaded-bar service figure is published[2][1]Not documented
Annealing response100 °C for 16 h (Polymaker Fiberon)[1]Annealing lifts HDT at 0.45 MPa from 75.5 to 114.7 °C and modulus from 3794 to 4207 MPa[3]
Thermal expansion (CTE)µm/m·K94 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[29]Not documented
Flammability / UL 94Flammable; no UL 94 rating published[1]Not documented
Environment & Chemical
UV resistance1–5Months outdoors before embrittlement — unstabilised polyamide yellows and chalks under UV[15]Degrades within weeks outdoors[30]
Chemical resistanceWithstands oils, fuels and alkalis[15]Not documented
Water / humidity resistance in service1–5Absorbs water, properties shift[21]Not documented
Food contactNot food-contact certified[15]Not documented
Biodegradability / compostabilityNot biodegradable[15]Not documented
RecyclabilityFibre-filled polyamide is not accepted in household plastic collection[15]Not documented
Electrical & ESD propertiesSurface resistance above 10⁹ ohm/sq — not static-dissipative (3DXTech, ASTM D257)[6]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[31]Low hazard — minimal VOC and particle emission[31]
VOC emission rateµg/minUp to 180 caprolactam, the dominant VOC from nylon and the largest single-VOC rate in the study[31]Not documented
Ultrafine-particle emission rateparticles/min≈2 × 10⁸ median for nylon — low for particles despite the highest VOC mass measured[31]Not documented
Hazardous species emittedCaprolactam, at up to 180 µg/min from nylon filament[31]Not documented
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[31]None needed in a normal room[31]
Dust & fibre handling hazardFibre is bound in the matrix; sanding dust should not be inhaled[1]Glass fibre is bound in the matrix; avoid inhaling sanding dust[32]
Post-Processing
Sanding & machiningSands to a matte finish; the fibre makes it cut more cleanly than unfilled nylon[18]Not documented
Gluing & solvent weldingCyanoacrylate; no common solvent welds polyamide[18]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[18]Not documented
Support material pairingPolyDissolve S1 (Polymaker Fiberon)[1]Not documented
Dimensional accuracy & detailConditioned parts grow; Polymaker declines to publish a standard dimensional allowance because it depends on geometry and infill[21]Near-zero shrinkage — 0.05 % in X-Y and Z (Polymaker)[3]
Solvents & Solubility
Soluble inFormic acid, phenol, m-cresol and hexafluoroisopropanol dissolve the matrix at 23 °C, leaving the fibre; laboratory reagents.[33]Chloroform dissolves the PLA matrix (10 % w/v, 2–4 h at 23 °C) and leaves the filler as loose sludge; laboratory reagent.[34]
Softened or crazed byZinc chloride solutions stress-crack the nylon matrix, alcoholic calcium chloride dissolves it, mineral acids attack it.[33]Acetone, ethyl acetate and toluene plasticise the matrix but dissolve <1 % even at 65 °C; acetone submersion crazes parts.[34][35]
Solvent welding & smoothing agentNone — nylon's only solvents (formic acid, phenol, HFIP) degrade the part, and the fibre blocks surface flow anyway.[33]Chloroform vapour attacks only the resin fraction, so the filler is left standing proud; no workshop-safe agent exists.[36][35]

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. Fiberon PA6-CF20 Technical Data Sheet V1.1 Polymaker · 2024-12 · tds
  2. Bambu Filament Technical Data Sheet — PA6-CF Bambu Lab · 2026-08 · tds
  3. Polymaker HT-PLA-GF Technical Data Sheet V1.1 Polymaker · 2026-08 · tds
  4. eSUN ePLA-GF Technical Data Sheet V1.0 (Nov 2023) eSUN (copy hosted on 3d.nice-cdn.com) · 2023-11 · tds
  5. Bambu Filament Technical Data Sheet V1.0 — PLA Galaxy Bambu Lab · 2026-08 · tds
  6. CarbonX Carbon Fiber Nylon (Gen3) Technical Data Sheet v3.0 3DXTech · 2026-08 · tds
  7. Polymaker product catalogue Polymaker · 2026-08 · vendor
  8. YXPOLYER PA6 CF-Black 1 kg — product page YXPOLYER · 2026-08 · vendor
  9. IEMAI 3D CF-PA6 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  10. Polymaker HT-PLA-GF — product page Polymaker Shop · 2026-08 · vendor
  11. Proto-pasta product catalogue Proto-pasta · 2026-08 · vendor
  12. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  13. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  14. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  15. PA (Nylon) — material basics Polymaker Wiki · 2026-08 · doc
  16. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  17. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  18. Nylon — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  19. Bambu Filament Technical Data Sheet V3.0 — PLA Basic Bambu Lab · 2026-08 · tds
  20. PolyLite PLA Technical Data Sheet V5.4 Polymaker · 2024-11 · tds
  21. Moisture Conditioning — effect on printed nylon properties Polymaker Wiki · 2026-08 · doc
  22. PolyMide CoPA Technical Data Sheet V5.4 (dry and wet status blocks) Polymaker · 2024-11 · tds
  23. TECAMID 66 GF30 black (PA66-GF30) — stock shape properties Ensinger · 2026-08 · tds
  24. TECACOMP PA66 CF30 black — injection-moulding compound Ensinger · 2026-08 · tds
  25. BambuLab PLA Basic vs PLA Tough vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  26. Polymaker PLA Pro vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  27. Carbon Fiber PLA vs META-PLA vs PLA+ vs PLA by Sunlu — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  28. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  29. FDM Nylon-CF10 — Material Data Sheet (blended nylon, 10 wt% carbon fibre) Stratasys · 2026-08 · tds
  30. PLA — material guide Prusa Knowledge Base · 2026-08 · doc
  31. 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
  32. StoneFil safety data sheet Formfutura · 2026-08 · msds
  33. Ultramid Nylon Chemical Resistance guide (unmodified PA6 B27E and PA66 A27E) BASF · 2026-08 · tds
  34. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  35. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  36. Effect of vapour smoothing in trichloromethane on 3D printed PLA — surface, mechanical and chemical structure Pitale, Keche & Chopra, Engineering Research Express 6(4) 045579 · 2024-12 · paper