3D Printing Info

Filament comparison

PETG-CF vs PPSU

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

Carbon-fibre PETG (PETG-CF) guidePPSU guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PETG-CF comparisonsMore PPSU comparisons
PETG-CF vs PPSU — documented properties and sources
PropertyCarbon-fibre PETG (PETG-CF)PETGPPSUHIGHTEMP
Market snapshot
Listing priceUSD/kg; dated snapshots$29.99/kg median; $16.00–$74.22/kg across 11 dated product listings$337.40/kg median; $223.00–$732.56/kg across 4 dated product listings
Identity & Market
Base polymer / chemistryPETG reinforced with chopped carbon fibre[1][2]Polyphenylsulfone — an amorphous high-temperature sulfone polymer[3]
Densityg/cm³1.25 (Bambu Lab) to 1.34 (3DXTech), ISO 1183; Prusament 1.27[1][4][2]1.28 (ISO 1183, 3DXTech; ASTM D792, Stratasys PPSF)[3][5]
Typical priceUSD/kg1 kg-equivalent spools span 16–74; the middle of the market is about 29[1][6][7][8][9][10][11][12]1 kg-equivalent spools span 223–733; the middle of the market is about 425[13][14][15][16]
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[17][1][13][6][7][8][9][10][11][12]223-733 across brands; IEMAI 3D 223 at 1 kg, 3DXTech ThermaX PPSU 250 at 500 g, 3D4Makers 425 at 750 g, Kimya PPSU-S 733 at 500 g[13][14][15][16]
Market availability1–5Stocked by most mainstream brands[1][13][6][17]Niche, a handful of specialist brands[13][14][15]
Spool sizes & diameters1.75 and 2.85 mm; 0.75 and 1 kg spools[13][1]1.75 and 2.85 mm; 200 g to 750 g spools[13][14][15]
Typical applicationsStiff functional parts and fixtures where PETG's toughness is traded for rigidity and a matte finish[1][2]Steam-sterilisable medical and dental tooling, and aircraft interior parts[3]
Diameter tolerance± mm±0.02 (Prusament)[2]Not documented
Printing Parameters
Nozzle temperature°C240–270 (Bambu Lab); 265 ± 10 (Prusament)[1][2]Not documented
Bed temperature°C65–75 (Bambu Lab); 90 ± 10 (Prusament)[1][2]130–150 (3DXTech)[3]
Enclosure / chamber requirement1–5Open frame fine; draught shield helps — Bambu Lab specifies a 35–50 °C chamber[1]Actively heated chamber required[18][19]
Recommended chamber temperature°C35–50 (Bambu Lab)[1]Not documented
Part cooling fan0–60 % (Bambu Lab); 50 % (Prusament)[1][2]Not documented
Bed surface & adhesion aidTextured PEI or engineering plate with glue (Bambu Lab)[1]Not documented
Maximum volumetric flow (mm³/s; see test conditions)mm³/s11.5 on My Tech Fun's Bambu Lab PETG-CF profile[20]Not documented
Warping tendency1–5Not documentedSevere — heated chamber needed[18]
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][21]Not documented
Overall printing difficulty1–5Intermediate — dry filament and a tuned profile; hardened nozzle mandatory[1]Expert / industrial hardware only[18][19]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required[1]Brass fine indefinitely for unfilled grades, but brass softens near these nozzle temperatures — hardened or plated hot ends are the norm[18]
Abrasiveness1–5Highly abrasive — standard CF composite[1]Non-abrasive when unfilled[3]
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[22][23]Moderate — needs dry filament and a clean nozzle; 3DXTech lists no special nozzle concerns but a mandatory 120 °C pre-dry before every print[24]
Heat-creep / jam sensitivity1–5Slightly sensitive[21]Not documented
Hotend requirementHardened steel nozzle; no high-temperature hot-end needed[1][21]Not documented
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Low — 0.30 % saturated at 25 °C / 55 % RH (Bambu Lab)[1]Not documented
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]0.37 in 24 h and 1.1 at saturation on extruded stock (ASTM D570)[25]
Drying temperature & time65 °C for 8 h (Bambu Lab)[1]Not documented
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[26]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][26]No dry-versus-conditioned figures are published; 3DXTech mandates a 120 °C, 4 h pre-dry before every print because trapped water flashes to steam at these nozzle temperatures[24]
Storage requirementSealed with desiccant; Bambu Lab says store dry after use[1][26]Not documented
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][4]55 (printed XY, ISO 527, 3DXTech) and 55 (printed on side long edge, ASTM D638, Stratasys PPSF); 79 at yield on extruded stock[3][5][25]
Young's modulusMPa2460 ± 230 (Bambu Lab) and 1700 (Prusament) printed XY, ISO 527[1][2]2100 (printed, ASTM D638, Stratasys PPSF) and 2310 (printed XY, ISO 527, 3DXTech); 2344 on extruded stock[3][5][25]
Elongation at break%4.3 at yield (Prusament, printed XY, ISO 527); 3 at break for 3DXTech[2][4]3 (printed, ISO 527 and ASTM D638) against 60 on extruded stock — printing costs PPSU almost all of its ductility[3][5][25]
Flexural strengthMPa68 ± 3 printed horizontal, ISO 178 (Prusament)[2]110 (printed, ISO 178 and ASTM D790, 3DXTech and Stratasys PPSF agree); 91 on extruded stock[3][5][25]
Flexural modulusMPa2300 printed horizontal, 3100 printed vertical, ISO 178 (Prusament)[2]2200 (printed, ASTM D790, Stratasys PPSF) and 2215 (printed XY, ISO 178, 3DXTech)[3][5]
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][20]Izod notched 58.7 J/m and unnotched 165.5 J/m (printed, ASTM D256 Method A, Stratasys PPSF); 160 J/m notched on extruded stock[5][25]
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][20]Not documented
Brittleness1–5Brittle — snaps with little warning[4]Brittle — snaps with little warning[3]
Hardness (scale-specific)Shore A / Shore D / Rockwell77 Shore D (Prusa Polymers method)[2]Rockwell M86 on printed PPSF (ASTM D785, Stratasys); M96 on extruded PPSU stock (and an unlabelled 123)[5][25]
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[20]Good. Printed PPSF holds 189 °C heat deflection at 1.8 MPa (ASTM D648) and extruded stock is rated 149 °C long-term service, but Ensinger does not claim the creep resistance it claims for PSU and PPS[5][25]
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[27]Not documented
Elasticity / flexibility1–5Rigid[1]Rigid[3]
Z strength as % of XY%83 (Bambu Lab, printed Z against XY tensile)[1]Not documented
Thermal Properties
HDT at 0.45 MPa°C74 (Bambu Lab) and 96 (Prusament), ISO 75 at 0.45 MPa[1][2]190 (printed XY, ISO 75 at 0.45 MPa, 3DXTech)[3]
HDT at 1.8 MPa°C68 (Bambu Lab) and 80 (Prusament), ISO 75 at 1.8 MPa[1][2]189 (printed, ASTM D648 at 264 psi, Stratasys PPSF); 207 on extruded stock, converted from 405 °F[5][25]
Glass transition (Tg)°C68 (Bambu Lab) and 80 (3DXTech), DSC[1][4]230 (DSC) — the highest glass transition in the dataset[3]
Melting point / Vicat°C225 melting (Bambu Lab, DSC) — the carbon fibre lets the PET fraction crystallise[1]Not documented
Continuous service temperature°C77 — loaded bars begin to move at this temperature, against 61 for Bambu Lab PETG Basic[20]149 long-term service on extruded PPSU stock, converted from 300 °F[25]
Thermal expansion (CTE)µm/m·KNot documented55.0 (printed PPSF, ASTM D696; source states 5.5e-5 mm/mm/°C) and 55.8 on extruded stock (ASTM D696, from 3.1e-5 in/in/°F)[5][25]
Flammability / UL 94Flammable; no UL 94 rating published[1]UL 94 V-0 at 1.5 mm, rated on the base resin[3]
Environment & Chemical
UV resistance1–5Moderate — a season or two; the carbon fibre does not add UV stabilisation[28]Not documented
Chemical resistanceWithstands acids, alkalis, oils and UV exposure, as for unfilled PETG[28]Withstands repeated steam autoclaving, the usual reason to choose PPSU over PSU; Stratasys also lists PPSF as passing 24 h stress-crack exposure to antifreeze, petrol, motor oil, power-steering, transmission and washer fluid at 23 °C and 100 °C[3][5]
Food contactNot certified for food contact[28]Not documented
Biodegradability / compostabilityNot biodegradable[28]Not documented
RecyclabilityFibre-filled PETG is not accepted in household plastic collection[28]Not documented
Electrical & ESD propertiesSurface resistance above 10⁹ ohm/sq — carbon fibre at this loading is not static-dissipative (3DXTech)[4]Volume resistivity 5e13 to 1.5e14 ohm-cm and dielectric strength 80-290 V/mil on printed PPSF (ASTM D257, D149)[5]
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[29]Moderate — measurable VOCs and UFPs, ventilation advised. None of these polymers was in the chamber study, and all are processed far above the temperatures it covered[29]
Ventilation / filtration requirement1–5Open a window / occasional ventilation[29]Ventilated room or enclosure recommended[29]
Dust & fibre handling hazardCarbon fibre is bound in the matrix; sanding dust should not be inhaled[4]Not documented
Post-Processing
Sanding & machiningSands to a matte finish more readily than unfilled PETG[21]Not documented
Gluing & solvent weldingCyanoacrylate; no common solvent welds it[21]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[21]Not documented
Support material pairingSupport for PLA or its own material (Bambu Lab)[1]Not documented
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.[30][31]Dichloromethane dissolves it at 23 °C at every stress level; acetone solvates and softens unstressed PPSU (Solvay ESCR).[32]
Softened or crazed byAcetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[30]MEK ruptures stressed parts and toluene crazes them above 13.8 MPa; glass-filled grades survive where unfilled craze.[32]
Solvent welding & smoothing agentDichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[31]Dichloromethane cements PPSU and NMP softens residual resin; both are laboratory reagents, not workshop stock.[32]

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. ThermaX PPSU Technical Data Sheet v3 3DXTech · 2026-08 · tds
  4. CarbonX Carbon Fiber PETG Technical Data Sheet 3DXTech · 2026-08 · tds
  5. PPSF (polyphenylsulfone) — FDM Data Sheet Stratasys · 2018-06 · tds
  6. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  7. SUNLU PETG-CF (PETG Carbon Fiber) 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  8. Fibreheart PETG-CF Pro Filament product page Siraya Tech · 2026-08 · vendor
  9. IEMAI CF-PETG 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  10. Reli3D Carbon Fiber PETG Filament 1.75 mm, 1 kg Reli3D (Amazon US) · 2026-08 · vendor
  11. PET-G CF15 Sakata 3D Filaments · 2026-08 · vendor
  12. Filament PM CFJet technical data sheet (TDS CFJet ENG.pdf) Filament PM (Plasty Mladec) · 2026-08 · tds
  13. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  14. Kimya PPSU-S Natural 1.75 mm 500 g igo3d · 2026-08 · vendor
  15. 3D4Makers product catalogue 3D4Makers · 2026-08 · vendor
  16. IEMAI 3D PPSU 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  17. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  18. Prusament PEI 1010 Technical Datasheet v1.0 Prusa Polymers · 2024-09 · tds
  19. Prusament PEI 1010 — material page Prusa Polymers · 2026-08 · doc
  20. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  21. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  22. CARBONX PETG+CF — product page (print recommendations) 3DXTech · 2026-08 · doc
  23. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  24. THERMAX PPSU — product page (print recommendations) 3DXTech · 2026-08 · doc
  25. TECASON P black (PPSU) — stock shape properties Ensinger · 2026-08 · tds
  26. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  27. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  28. PETG — material basics Polymaker Wiki · 2026-08 · doc
  29. 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
  30. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  31. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  32. Radel PPSU, Veradel PESU, Acudel modified PPSU Design Guide — environmental stress cracking tables Solvay Specialty Polymers · 2026-08 · tds