3D Printing Info

Filament comparison

PETG-CF vs PPA-CF

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

Carbon-fibre PETG (PETG-CF) guidePPA-CF (carbon-fibre polyphthalamide) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PETG-CF comparisonsMore PPA-CF comparisons
PETG-CF vs PPA-CF — documented properties and sources
PropertyCarbon-fibre PETG (PETG-CF)PETGPPA-CF (carbon-fibre polyphthalamide)PA
Market snapshot
Listing priceUSD/kg; dated snapshots$29.99/kg median; $16.00–$74.22/kg across 11 dated product listings$84.99/kg median; $21.99–$266.67/kg across 7 dated product listings
Identity & Market
Base polymer / chemistryPETG reinforced with chopped carbon fibre[1][2]Polyphthalamide — semi-aromatic nylon — with 10–15 wt% chopped carbon fibre; Bambu Lab lists the composition as semi-aromatic nylon plus carbon fibre, Raise3D and Siraya Tech state 15 wt%, Flashforge 10 %[3][4][5][6]
Densityg/cm³1.25 (Bambu Lab) to 1.34 (3DXTech), ISO 1183; Prusament 1.27[1][7][2]1.15 (Raise3D) to 1.25 (Bambu Lab and IEMAI 3D), ISO 1183; Flashforge 1.21–1.23[3][4][5][8]
Typical priceUSD/kg1 kg-equivalent spools span 16–74; the middle of the market is about 29[1][9][10][11][12][13][14][15]1 kg-equivalent spools span 22–267; the middle of the market is about 85[16][17][18][19][20][21]
Price range across brandsUSD/kg16–74 across brands; ELEGOO 16 in a 5 kg pack, Reli3D 17, SUNLU 20, IEMAI 22, Siraya Tech 25, Bambu Lab 32, Sakata 3D 53, 3DXTech 67, Prusament 70, Filament PM 74 on 0.5 kg spools[22][1][23][9][10][11][12][13][14][15]22–267 across brands; CHCKX 22 on Amazon, IEMAI 3D 51, Siraya Tech 57 and 85, Bambu Lab 200 at 750 g, Raise3D 209, 3DXTech CarbonX HTN+CF 267 at 750 g[16][17][18][24][19][20][21]
Market availability1–5Stocked by most mainstream brands[1][23][9][22]Available from several mainstream brands[16][17][18][19][20]
Spool sizes & diameters1.75 and 2.85 mm; 0.75 and 1 kg spools[23][1]1.75 mm; 750 g, 1 kg, 2 kg and 2.5 kg spools[3][18][20]
Typical applicationsStiff functional parts and fixtures where PETG's toughness is traded for rigidity and a matte finish[1][2]Under-bonnet automotive brackets, jigs and end-use parts that must stay stiff above the 100 °C working ceiling of PA6-CF[4][5]
Diameter tolerance± mm±0.02 (Prusament)[2]0.05 (Bambu Lab and Siraya Tech, 1.75 mm)[3][6]
Printing Parameters
Nozzle temperature°C240–270 (Bambu Lab); 265 ± 10 (Prusament)[1][2]280–310 (Bambu Lab and CHCKX); 280–320 (Siraya Tech)[3][6][21]
Bed temperature°C65–75 (Bambu Lab); 90 ± 10 (Prusament)[1][2]100–120 (Bambu Lab and CHCKX); Siraya Tech runs cooler at 70–90[3][6][21]
Enclosure / chamber requirement1–5Open frame fine; draught shield helps — Bambu Lab specifies a 35–50 °C chamber[1]Enclosure required (passive) — Bambu Lab specifies a 50–80 °C chamber and Siraya Tech requires an enclosure, while Flashforge states its LUVOCOM-based grade prints on machines with no heated chamber[3][5][18]
Recommended chamber temperature°C35–50 (Bambu Lab)[1]50–80 (Bambu Lab); specimens were printed at a 52 °C chamber and Bambu Lab notes 70–80 °C raises Z properties[3]
Part cooling fan0–60 % (Bambu Lab); 50 % (Prusament)[1][2]Bambu Lab turns the part fan on; Siraya Tech runs it off[3][6]
Bed surface & adhesion aidTextured PEI or engineering plate with glue (Bambu Lab)[1]Smooth or textured PEI plate with a glue stick, or a PVP glue coating[3][6]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s11.5 on My Tech Fun's Bambu Lab PETG-CF profile[25]8–12 mm³/s at 300–320 °C (Siraya Tech)[6]
Bed-adhesion difficulty1–5Needs the right surface or a thin adhesive[1]Not documented
Stringing / oozing tendency1–5Slight — the fibre reduces stringing against unfilled PETG[1][26]Not documented
Overall printing difficulty1–5Intermediate — dry filament and a tuned profile; hardened nozzle mandatory[1]Advanced — enclosure, hardware upgrades, tuning; a 320 °C hot end and a hardened nozzle are the entry requirements[3][6]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required[1]Hardened steel required — Siraya Tech and CHCKX specify hardened steel or better, Raise3D warns brass wears quickly[4][6][21]
Abrasiveness1–5Highly abrasive — standard CF composite[1]Highly abrasive — standard CF/GF composites and glow fills[4][6]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; 3DXTech specifies a hardened 0.4 mm minimum nozzle and 0.25 mm layers or higher, and Prusa lists composites as a higher clogging risk[27][28]Moderate — needs dry filament and a clean nozzle; Siraya Tech states nozzles below 0.4 mm will clog[6][18]
Heat-creep / jam sensitivity1–5Slightly sensitive[26]Not documented
Hotend requirementHardened steel nozzle; no high-temperature hot-end needed[1][26]Not documented
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Low — 0.30 % saturated at 25 °C / 55 % RH (Bambu Lab)[1]High (0.8–2 %) — 1.30 % saturated at 25 °C / 55 % RH for Bambu Lab and IEMAI 3D against 2.35 % for the same makers' PA6-CF, which is the whole reason to pay for PPA[3][8][29]
Equilibrium moisture content at ~50 % RH%0.30 saturated at 25 °C / 55 % RH (Bambu Lab); Prusa measures 0.10 after 7 days at 22 % RH[1][2]1.30 saturated at 25 °C / 55 % RH (Bambu Lab and IEMAI 3D) against 2.35 for their PA6-CF; Siraya Tech 1.37 and 1.09 by ISO 62, Raise3D 0.6 by ISO 62 Method 1, Flashforge below 0.1 at 23 °C / 24 h[3][4][5][6][30][8][29]
Drying temperature & time65 °C for 8 h (Bambu Lab)[1]100–140 °C for 8–12 h (Bambu Lab, hotter is better within that range); Siraya Tech 100 °C for 4–6 h; Raise3D 80–100 °C for 6–12 h[3][4][6]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[31]Not documented
Effect of moisture on strengthNo dry-versus-conditioned figures published; Bambu Lab states PETG-CF must be properly dried before printing and stored dry after use[1][31]Not documented
Storage requirementSealed with desiccant; Bambu Lab says store dry after use[1][31]Sealed below 20 % RH with desiccant (Bambu Lab); Raise3D keeps the spool in a dry box throughout the print[3][4]
Mechanical Properties
Tensile strength (XY)MPa35 ± 5 (Bambu Lab) and 47 ± 2 at yield (Prusament) printed XY, ISO 527; 56 at break for 3DXTech[1][2][7]95–168 (printed XY, ISO 527): Siraya Tech 95, Flashforge 108–112, Siraya Tech Core 112, Raise3D 122 conditioned and annealed, Bambu Lab and IEMAI 3D 168[3][4][5][6][30][8]
Young's modulusMPa2460 ± 230 (Bambu Lab) and 1700 (Prusament) printed XY, ISO 527[1][2]7100–11800 (printed XY): Flashforge 7100–8000, Raise3D and Siraya Tech 7800, Siraya Tech Core 9300, Bambu Lab and IEMAI 3D 11800[3][4][5][6][30][8]
Elongation at break%4.3 at yield (Prusament, printed XY, ISO 527); 3 at break for 3DXTech[2][7]1.9–5 at break (printed XY): Raise3D 1.9, Siraya Tech 2, Siraya Tech Core 2.25, Bambu Lab and IEMAI 3D 3.2, Flashforge 3.5–5[3][4][5][6][30][8]
Flexural strengthMPa68 ± 3 printed horizontal, ISO 178 (Prusament)[2]145–221 (printed XY, ISO 178): Siraya Tech 145, Siraya Tech Core 178, Raise3D 190, Bambu Lab and IEMAI 3D 208, Flashforge 210–221[3][4][5][6][30][8]
Flexural modulusMPa2300 printed horizontal, 3100 printed vertical, ISO 178 (Prusament)[2]6500–9860 (printed XY, ISO 178): Flashforge 6500–7000, Siraya Tech 6800, Raise3D 8510, Siraya Tech Core 8700, Bambu Lab and IEMAI 3D 9860[3][4][5][6][30][8]
Charpy impact, notchedkJ/m²Not documented6.5 notched Charpy XY (Bambu Lab and IEMAI 3D, ISO 179); Raise3D 7.8 and Siraya Tech 11 by ISO 179 without stating notched[3][4][6][8]
Other impact dataCharpy unnotched 29 ± 6 printed horizontal and 43 ± 8 printed vertical (Prusament, ISO 179-1); Izod 4.91 kJ/m² on My Tech Fun bars[2][25]Bambu Lab and IEMAI 3D unnotched Charpy 41.7 kJ/m² XY against 4.3 in Z; Flashforge Izod 9–11 kJ/m² XY against 2.5–3 in Z[3][5][8]
Layer adhesion / Z tensileMPa29 ± 4 printed Z (Bambu Lab, ISO 527); 18 ± 3 by Prusa's interlayer adhesion test; 10.7 on My Tech Fun bars[1][2][25]57 printed Z (Bambu Lab and IEMAI 3D, ISO 527); Raise3D measures 30.2 by a custom mono-layer method[3][4][8]
Brittleness1–5Brittle — snaps with little warning[7]Brittle — snaps with little warning; 2–3 % elongation at break is typical[3][4][6]
Hardness (scale-specific)Shore A / Shore D / Rockwell77 Shore D (Prusa Polymers method)[2]Not documented
Creep resistance / sustained load1–5Below average — a 12 mm bar sagged to 16.4 mm over 5 days at 1.25 kg, less than plain PETG's 19.4[25]Good — Flashforge cites outstanding creep resistance at high temperature and Raise3D high creep resistance, both against other nylons[4][5]
Fatigue / repeated-flex resistance1–5Moderate — no CF-grade S-N curve; unfilled printed PETG ran 79 000–193 000 cycles at 30 % of tensile strength[32]Not documented
Elasticity / flexibility1–5Rigid[1]Rigid[3]
Z strength as % of XY%83 (Bambu Lab, printed Z against XY tensile)[1]34 (Bambu Lab and IEMAI 3D, Z against XY tensile, ISO 527)[3][8]
Thermal Properties
HDT at 0.45 MPa°C74 (Bambu Lab) and 96 (Prusament), ISO 75 at 0.45 MPa[1][2]188–227 (ISO 75 at 0.45 MPa): Raise3D 188, Flashforge 220, Bambu Lab and IEMAI 3D 227; Siraya Tech reaches 192–199 only after annealing, 84.5–97 unannealed[3][4][5][6][30][8]
HDT at 1.8 MPa°C68 (Bambu Lab) and 80 (Prusament), ISO 75 at 1.8 MPa[1][2]113–196 (ISO 75 at 1.8 MPa): Raise3D 113, Bambu Lab and IEMAI 3D 196; Siraya Tech reaches 119–126 only after annealing, 82.5–84 unannealed[3][4][6][30][8]
Glass transition (Tg)°C68 (Bambu Lab) and 80 (3DXTech), DSC[1][7]80 (Siraya Tech, ASTM D3418) to 85 (Bambu Lab and IEMAI 3D, DSC)[3][6][8]
Melting point / Vicat°C225 melting (Bambu Lab, DSC) — the carbon fibre lets the PET fraction crystallise[1]Melting point 231 (Raise3D) to 258 (Bambu Lab and IEMAI 3D); Vicat softening 230–238 (ISO 306)[3][4][6][30][8]
Continuous service temperature°C77 — loaded bars begin to move at this temperature, against 61 for Bambu Lab PETG Basic[25]120 (Flashforge, IEC 60216, LUVOCOM PPA-CF)[5]
Annealing responseNot documentedBambu Lab anneals at 120–140 °C for 6–12 h; Raise3D at 80–100 °C for 8 h and warns of up to 0.5 % Z shrinkage. On Siraya Tech's grades annealing lifts HDT at 0.45 MPa from 84.5 to 192 °C while notched Charpy falls from 11 to 6.3 kJ/m²[3][4][6]
Flammability / UL 94Flammable; no UL 94 rating published[1]Flammable; Bambu Lab lists water, carbon oxides and nitrogen oxides as combustion products. No UL 94 rating is published for the filament grades surveyed[3]
Environment & Chemical
UV resistance1–5Moderate — a season or two; the carbon fibre does not add UV stabilisation[33]Not documented
Chemical resistanceWithstands acids, alkalis, oils and UV exposure, as for unfilled PETG[33]Better than general nylon against weak acids, weak alkalis, most organic solvents and most oils and greases (Bambu Lab); not resistant to strong acids or strong alkalis[3]
Water / humidity resistance in service1–5Not documentedGood — minor absorption; 1.3 % saturated moisture is roughly half what PA6-CF takes up[3][29]
Food contactNot certified for food contact[33]Not documented
Biodegradability / compostabilityNot biodegradable[33]Not documented
RecyclabilityFibre-filled PETG is not accepted in household plastic collection[33]Not documented
Electrical & ESD propertiesSurface resistance above 10⁹ ohm/sq — carbon fibre at this loading is not static-dissipative (3DXTech)[7]Flashforge's data sheet gives a surface resistance of 10³ Ω or below (IEC 60093) for its LUVOCOM-based PPA-CF — the carbon loading makes it conductive rather than merely dissipative[5]
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[34]Not documented
Ventilation / filtration requirement1–5Open a window / occasional ventilation[34]Not documented
Dust & fibre handling hazardCarbon fibre is bound in the matrix; sanding dust should not be inhaled[7]Chopped carbon fibre; dry sanding and cutting release respirable fibre-laden dust[35]
Post-Processing
Sanding & machiningSands to a matte finish more readily than unfilled PETG[26]Not documented
Gluing & solvent weldingCyanoacrylate; no common solvent welds it[26]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[26]Not documented
Support material pairingSupport for PLA or its own material (Bambu Lab)[1]Bambu Lab pairs it with Support for PA/PET; Raise3D warns that PPA-CF used as its own support bonds permanently to the model once it takes up moisture, so supports must come off before annealing[3][4]
Dimensional accuracy & detailMatte finish hides layer lines; stringing is reduced against unfilled PETG[1]Not documented
Solvents & Solubility
Soluble inNo common workshop solvent; dichloromethane — a carcinogen — dissolves the matrix surface, 1,2-dichloroethane destroys it in a week.[36][37]Formic acid, phenol, m-cresol and hexafluoroisopropanol dissolve the matrix at 23 °C, leaving the fibre; laboratory reagents.[38]
Softened or crazed byAcetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[36]Zinc chloride solutions stress-crack the nylon matrix, alcoholic calcium chloride dissolves it, mineral acids attack it.[38]
Solvent welding & smoothing agentDichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[37]None — nylon's only solvents (formic acid, phenol, HFIP) degrade the part, and the fibre blocks surface flow anyway.[38]

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. Bambu Filament Technical Data Sheet — PETG-CF Bambu Lab · 2026-08 · tds
  2. Prusament PETG Carbon Fiber Technical Datasheet Prusa Polymers · 2026-08 · tds
  3. Bambu Filament Technical Data Sheet V1.0 — PPA-CF Bambu Lab · 2026-08 · tds
  4. Raise3D Industrial PPA CF Technical Data Sheet V2.0 Raise3D · 2022-04 · tds
  5. Flashforge PPA-CF Filament Technical Data Sheet (LUVOCOM PPA-CF, 10 % carbon fibre) Flashforge · 2026-08 · tds
  6. Siraya Tech Fibreheart PPA-CF Technical Data Sheet Siraya Tech · 2026-08 · tds
  7. CarbonX Carbon Fiber PETG Technical Data Sheet 3DXTech · 2026-08 · tds
  8. IEMAI 3D CF-PPA Technical Data Sheet IEMAI 3D · 2025-04 · tds
  9. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  10. SUNLU PETG-CF (PETG Carbon Fiber) 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  11. Fibreheart PETG-CF Pro Filament product page Siraya Tech · 2026-08 · vendor
  12. IEMAI CF-PETG 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  13. Reli3D Carbon Fiber PETG Filament 1.75 mm, 1 kg Reli3D (Amazon US) · 2026-08 · vendor
  14. PET-G CF15 Sakata 3D Filaments · 2026-08 · vendor
  15. Filament PM CFJet technical data sheet (TDS CFJet ENG.pdf) Filament PM (Plasty Mladec) · 2026-08 · tds
  16. PPA-CF — Bambu Lab US Store Bambu Lab · 2026-08 · vendor
  17. Raise3D Industrial PPA CF Filament 1.75 mm (1 kg) — product listing MatterHackers · 2026-08 · vendor
  18. Fibreheart PPA-CF Filament — product page Siraya Tech · 2026-08 · vendor
  19. IEMAI 3D CF-PPA 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  20. CARBONX HTN+CF — product page 3DXTech · 2026-08 · vendor
  21. CHCKX PPA-CF 3D Printing Filament Matte Black 1 kg 1.75 mm 10 % Carbon Fiber — Amazon listing Amazon.com · 2026-08 · vendor
  22. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  23. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  24. Siraya Tech Fibreheart PPA-CF Core Filament — product page Siraya Tech · 2026-08 · vendor
  25. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  26. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  27. CARBONX PETG+CF — product page (print recommendations) 3DXTech · 2026-08 · doc
  28. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  29. Bambu Filament Technical Data Sheet V3.0 — PA6-CF Bambu Lab · 2026-08 · tds
  30. Siraya Tech Fibreheart PPA-CF Core Technical Data Sheet Siraya Tech · 2026-08 · tds
  31. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  32. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  33. PETG — material basics Polymaker Wiki · 2026-08 · doc
  34. 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
  35. PET-CF / PPA-CF / PPS-CF / PA6-CF carbon fibre filament usage guide Bambu Lab Wiki · 2026-08 · doc
  36. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  37. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  38. Ultramid Nylon Chemical Resistance guide (unmodified PA6 B27E and PA66 A27E) BASF · 2026-08 · tds