3D Printing Info

Filament comparison

PEI 1010 vs PETG-CF

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

PEI (ULTEM 1010) guideCarbon-fibre PETG (PETG-CF) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PEI 1010 comparisonsMore PETG-CF comparisons
PEI 1010 vs PETG-CF — documented properties and sources
PropertyPEI (ULTEM 1010)HIGHTEMPCarbon-fibre PETG (PETG-CF)PETG
Market snapshot
Listing priceUSD/kg; dated snapshots$281.22/kg median; $195.00–$698.00/kg across 6 dated product listings$29.99/kg median; $16.00–$74.22/kg across 11 dated product listings
Identity & Market
Base polymer / chemistryPolyetherimide, ULTEM 1010 grade — the higher-temperature, food- and medical-contact PEI[1][2]PETG reinforced with chopped carbon fibre[3][4]
Densityg/cm³1.27 (ISO 1183, 3DXTech and Prusament); 1.29 specific gravity on moulded plaques (ASTM D792, Stratasys)[1][2][5]1.25 (Bambu Lab) to 1.34 (3DXTech), ISO 1183; Prusament 1.27[3][6][4]
Typical priceUSD/kg1 kg-equivalent spools span 195–698; the middle of the market is about 270[7][8][9][10][11]1 kg-equivalent spools span 16–74; the middle of the market is about 29[3][12][13][14][15][16][17][18]
Price range across brandsUSD/kg195-698 across brands and grades; 3DXTech ThermaX PEI 1010 195 at 2 kg, IEMAI 3D 223 at 1 kg, 3D4Makers 270 at 2 kg, Prusament 292 at 500 g, Kimya 347 at 500 g, 3DXTech ESD-PEI 1010 698 at 500 g[7][8][9][10][11]16–74 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[19][3][7][12][13][14][15][16][17][18]
Market availability1–5Niche, a handful of specialist brands[7][8][9][10]Stocked by most mainstream brands[3][7][12][19]
Spool sizes & diameters1.75 and 2.85 mm; 200 g to 2 kg spools, plus Stratasys canisters[7][10][5]1.75 and 2.85 mm; 0.75 and 1 kg spools[7][3]
Typical applicationsAutoclavable tooling, food-contact fixtures and parts that must hold load near 200 °C[2]Stiff functional parts and fixtures where PETG's toughness is traded for rigidity and a matte finish[3][4]
Diameter tolerance± mmNot documented±0.02 (Prusament)[4]
Printing Parameters
Nozzle temperature°C410 ± 10 (Prusament) — the hottest nozzle in the dataset[2]240–270 (Bambu Lab); 265 ± 10 (Prusament)[3][4]
Bed temperature°C140–160 (Prusament); 130–140 (3DXTech)[2][1]65–75 (Bambu Lab); 90 ± 10 (Prusament)[3][4]
Enclosure / chamber requirement1–5Actively heated chamber required — Prusa specifies 90 °C[2]Open frame fine; draught shield helps — Bambu Lab specifies a 35–50 °C chamber[3]
Recommended chamber temperature°C90 (Prusament)[2]35–50 (Bambu Lab)[3]
Part cooling fanNot documented0–60 % (Bambu Lab); 50 % (Prusament)[3][4]
Bed surface & adhesion aidPA nylon sheet or powder-coated sheet with high-temperature glue (Prusament)[2]Textured PEI or engineering plate with glue (Bambu Lab)[3]
Maximum volumetric flow (mm³/s; see test conditions)mm³/sNot documented11.5 on My Tech Fun's Bambu Lab PETG-CF profile[20]
Warping tendency1–5Severe — heated chamber needed[2]Not documented
Bed-adhesion difficulty1–5Not documentedNeeds the right surface or a thin adhesive[3]
Stringing / oozing tendency1–5Not documentedSlight — the fibre reduces stringing against unfilled PETG[3][21]
Overall printing difficulty1–5Expert / industrial hardware only[2][22]Intermediate — dry filament and a tuned profile; hardened nozzle mandatory[3]
Extruder requirementA hot end rated to 420 °C, a heated chamber and a high-temperature bed; Prusa dries the filament at 150 °C for 6–8 h before printing[2]Not documented
Hardware Wear & Reliability
Nozzle hardness required1–4Brass fine indefinitely for unfilled grades, but brass softens near these nozzle temperatures — hardened or plated hot ends are the norm[2]Hardened steel required[3]
Abrasiveness1–5Non-abrasive when unfilled[1]Highly abrasive — standard CF composite[3]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; 3DXTech lists no special nozzle concerns but a mandatory 150 °C pre-dry before every print[23]Moderate — 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[24][25]
Heat-creep / jam sensitivity1–5Not documentedSlightly sensitive[21]
Hotend requirementNot documentedHardened steel nozzle; no high-temperature hot-end needed[3][21]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Not documentedLow — 0.30 % saturated at 25 °C / 55 % RH (Bambu Lab)[3]
Equilibrium moisture content at ~50 % RH%0.4 in 24 h and 0.7 in 7 days at 24 °C and 22 % RH (Prusament)[2]0.30 saturated at 25 °C / 55 % RH (Bambu Lab); Prusa measures 0.10 after 7 days at 22 % RH[3][4]
Drying temperature & time150 °C for 6–8 h (Prusament) — the hottest drying schedule in the dataset[2]65 °C for 8 h (Bambu Lab)[3]
Symptoms when wetNot documentedBubbling and popping at the nozzle, stringing and a rough surface[26]
Effect of moisture on strengthNo dry-versus-conditioned figures are published; 3DXTech mandates a 150 °C, 4 h pre-dry before every print because trapped water flashes to steam at these nozzle temperatures[23]No dry-versus-conditioned figures published; Bambu Lab states PETG-CF must be properly dried before printing and stored dry after use[3][26]
Storage requirementNot documentedSealed with desiccant; Bambu Lab says store dry after use[3][26]
Mechanical Properties
Tensile strength (XY)MPa79-95 printed in plane: Stratasys 79.2 (F900 T14) to 91.6 (F3300 N500) at break in XZ, ASTM D638; Prusament 95 +/- 3.5 at yield printed horizontal, ISO 527-1; 3DXTech quotes 56 (ISO 527)[5][2][1]35 ± 5 (Bambu Lab) and 47 ± 2 at yield (Prusament) printed XY, ISO 527; 56 at break for 3DXTech[3][4][6]
Young's modulusMPa2300-3040 printed in plane: Prusament 2300 +/- 100 horizontal (ISO 527-1), Stratasys 2920-3040 in XZ (ASTM D638); 3DXTech quotes 2500[5][2][1]2460 ± 230 (Bambu Lab) and 1700 (Prusament) printed XY, ISO 527[3][4]
Elongation at break%4.0-4.1 at break in XZ (ASTM D638, Stratasys); Prusament gives 6.6 +/- 0.7 at yield printed horizontal (ISO 527-1); 3DXTech quotes 3[5][2][1]4.3 at yield (Prusament, printed XY, ISO 527); 3 at break for 3DXTech[4][6]
Flexural strengthMPa128 at 5 % strain (F900 T14) and 144 at break (F3300) printed XZ, ASTM D790; Prusament 98 +/- 6.5 horizontal and 138 +/- 5.3 vertical (ISO 178); 3DXTech quotes 110[5][2][1]68 ± 3 printed horizontal, ISO 178 (Prusament)[4]
Flexural modulusMPa2910-3260 printed XZ (ASTM D790, Stratasys); Prusament 2300 horizontal and 2700 vertical (ISO 178); 3DXTech quotes 2510[5][2][1]2300 printed horizontal, 3100 printed vertical, ISO 178 (Prusament)[4]
Charpy impact, notchedkJ/m²3.4 ± 0.9 printed horizontal and 3.6 ± 0.4 printed vertical, ISO 179-1 notched (Prusament)[2]Not documented
Other impact dataIzod notched 26.6-36.3 J/m XZ against 21.7-27.2 J/m ZX; unnotched 260-406 J/m XZ against 68-116 J/m ZX (printed, ASTM D256/D4812, Stratasys). Charpy unnotched 19.7 +/- 4.3 horizontal and 39 +/- 10 vertical (Prusament, ISO 179-1)[5][2]Charpy unnotched 29 ± 6 printed horizontal and 43 ± 8 printed vertical (Prusament, ISO 179-1); Izod 4.91 kJ/m² on My Tech Fun bars[4][20]
Layer adhesion / Z tensileMPa28-37 at break (printed ZX, ASTM D638, Stratasys F900 and F3300) against 72 +/- 5 at yield printed vertical (ISO 527-1, Prusament on the Pro HT90 with a 0.6 mm nozzle and 90 °C chamber) — a fourfold spread driven by chamber temperature and bead size[5][2]29 ± 4 printed Z (Bambu Lab, ISO 527); 18 ± 3 by Prusa's interlayer adhesion test; 10.7 on My Tech Fun bars[3][4][20]
Brittleness1–5Brittle — snaps with little warning; notched Charpy only 3.4 kJ/m²[2]Brittle — snaps with little warning[6]
Hardness (scale-specific)Shore A / Shore D / RockwellShore D 83.5 (Prusa Polymers method); Rockwell M110 / R126 on extruded PEI stock (ASTM D785)[2][27]77 Shore D (Prusa Polymers method)[4]
Creep resistance / sustained load1–5Excellent — holds load for years. Printed coupons hold 215 °C heat deflection at 1.8 MPa (ASTM D648) and extruded PEI stock is rated 170 °C long-term service[5][27]Below 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]
Fatigue / repeated-flex resistance1–5Not documentedModerate — no CF-grade S-N curve; unfilled printed PETG ran 79 000–193 000 cycles at 30 % of tensile strength[28]
Elasticity / flexibility1–5Rigid[2]Rigid[3]
Z strength as % of XY%36-40 (Stratasys ZX against XZ tensile at break, ASTM D638) against 76 (Prusament vertical against horizontal tensile yield, ISO 527-1)[5][2]83 (Bambu Lab, printed Z against XY tensile)[3]
Thermal Properties
HDT at 0.45 MPa°C207 (Prusament, ISO 75 at 0.45 MPa) to 217 (printed XY 216.9 and XZ 217.1, ASTM D648 Method B at 66 psi, Stratasys); 3DXTech quotes 208[2][5][1]74 (Bambu Lab) and 96 (Prusament), ISO 75 at 0.45 MPa[3][4]
HDT at 1.8 MPa°C194 (Prusament, ISO 75 at 1.8 MPa) to 215 (printed XY 215.1 and XZ 214.5, ASTM D648 Method B at 264 psi, Stratasys) — the highest heat deflection in the dataset[2][5]68 (Bambu Lab) and 80 (Prusament), ISO 75 at 1.8 MPa[3][4]
Glass transition (Tg)°C209 (moulded plaque, ASTM D7426 inflection point, Stratasys); 217 (DSC, 3DXTech)[5][1]68 (Bambu Lab) and 80 (3DXTech), DSC[3][6]
Melting point / Vicat°CNot documented225 melting (Bambu Lab, DSC) — the carbon fibre lets the PET fraction crystallise[3]
Continuous service temperature°C170 long-term service on extruded PEI stock, converted from 338 °F; 200 short term[27]77 — loaded bars begin to move at this temperature, against 61 for Bambu Lab PETG Basic[20]
Thermal expansion (CTE)µm/m·K36.1 (printed XY, -50 to 60 °C, ASTM E831), falling to 29.8 over 60-205 °C; ZX gives 32.5 over -50 to 110 °C and 16.2 over 110-165 °C[5]Not documented
Flammability / UL 94UL 94 V-0 at 1.5 mm, rated on the base resin[1]Flammable; no UL 94 rating published[3]
Environment & Chemical
UV resistance1–5Not documentedModerate — a season or two; the carbon fibre does not add UV stabilisation[29]
Chemical resistanceNot documentedWithstands acids, alkalis, oils and UV exposure, as for unfilled PETG[29]
Food contactNot documentedNot certified for food contact[29]
Biodegradability / compostabilityNot documentedNot biodegradable[29]
RecyclabilityNot documentedFibre-filled PETG is not accepted in household plastic collection[29]
Electrical & ESD propertiesNot documentedSurface resistance above 10⁹ ohm/sq — carbon fibre at this loading is not static-dissipative (3DXTech)[6]
Health & Safety
Fume toxicity1–5Moderate — 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[30]Moderate — measurable VOCs and UFPs, ventilation advised[30]
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[30]Open a window / occasional ventilation[30]
Dust & fibre handling hazardNot documentedCarbon fibre is bound in the matrix; sanding dust should not be inhaled[6]
Post-Processing
Sanding & machiningNot documentedSands to a matte finish more readily than unfilled PETG[21]
Gluing & solvent weldingNot documentedCyanoacrylate; no common solvent welds it[21]
Vapour / chemical smoothingNot documentedNo practical vapour smoothing[21]
Support material pairingNot documentedSupport for PLA or its own material (Bambu Lab)[3]
Dimensional accuracy & detailNot documentedMatte finish hides layer lines; stringing is reduced against unfilled PETG[3]
Solvents & Solubility
Soluble inChlorinated hydrocarbons — dichloromethane and chloroform — are solvents for polyetherimide. Laboratory reagents.[31][32]No common workshop solvent; dichloromethane — a carcinogen — dissolves the matrix surface, 1,2-dichloroethane destroys it in a week.[33][34]
Softened or crazed byAcetone, MEK, benzene, toluene and butyl acetate craze or stress-crack it; alcohols, fuels and dilute acids do not.[32][31]Acetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[33]
Solvent welding & smoothing agentDichloromethane is the only welding route, and it is a controlled carcinogen rather than a workshop material.[31][32]Dichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[34]

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. ThermaX PEI 1010 Technical Data Sheet v4 3DXTech · 2026-08 · tds
  2. Prusament PEI 1010 Technical Datasheet v1.0 Prusa Polymers · 2024-09 · tds
  3. Bambu Filament Technical Data Sheet — PETG-CF Bambu Lab · 2026-08 · tds
  4. Prusament PETG Carbon Fiber Technical Datasheet Prusa Polymers · 2026-08 · tds
  5. ULTEM 1010 Resin — FDM Material Data Sheet Stratasys · 2026-06 · tds
  6. CarbonX Carbon Fiber PETG Technical Data Sheet 3DXTech · 2026-08 · tds
  7. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  8. Kimya PEI-1010 Amber Yellow 1.75 mm 500 g igo3d · 2026-08 · vendor
  9. Prusa Prusament PEI 1010 Natural (NFC), 1.75 mm / 500 g 3DJAKE · 2026-08 · vendor
  10. 3D4Makers product catalogue 3D4Makers · 2026-08 · vendor
  11. IEMAI 3D PEI 1010 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  12. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  13. SUNLU PETG-CF (PETG Carbon Fiber) 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  14. Fibreheart PETG-CF Pro Filament product page Siraya Tech · 2026-08 · vendor
  15. IEMAI CF-PETG 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  16. Reli3D Carbon Fiber PETG Filament 1.75 mm, 1 kg Reli3D (Amazon US) · 2026-08 · vendor
  17. PET-G CF15 Sakata 3D Filaments · 2026-08 · vendor
  18. Filament PM CFJet technical data sheet (TDS CFJet ENG.pdf) Filament PM (Plasty Mladec) · 2026-08 · tds
  19. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  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. Prusament PEI 1010 — material page Prusa Polymers · 2026-08 · doc
  23. THERMAX PEI 1010 — product page (print recommendations) 3DXTech · 2026-08 · doc
  24. CARBONX PETG+CF — product page (print recommendations) 3DXTech · 2026-08 · doc
  25. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  26. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  27. TECAPEI natural (PEI) — stock shape properties Ensinger · 2026-08 · tds
  28. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  29. PETG — material basics Polymaker Wiki · 2026-08 · doc
  30. 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
  31. Radel PPSU, Veradel PESU, Acudel modified PPSU Design Guide — environmental stress cracking tables Solvay Specialty Polymers · 2026-08 · tds
  32. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  33. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  34. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc