3D Printing Info

Filament comparison

PETG vs PETG-CF

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

PETG guideCarbon-fibre PETG (PETG-CF) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PETG comparisonsMore PETG-CF comparisons
PETG vs PETG-CF — documented properties and sources
PropertyPETGPETGCarbon-fibre PETG (PETG-CF)PETG
Market snapshot
Listing priceUSD/kg; dated snapshots$19.99/kg median; $8.99–$69.99/kg across 21 dated product listings$29.99/kg median; $16.00–$74.22/kg across 11 dated product listings
Identity & Market
Base polymer / chemistryPolyethylene terephthalate glycol copolymer — PET with a glycol comonomer that suppresses crystallisation[1][2]PETG reinforced with chopped carbon fibre[3][4]
Densityg/cm³1.24–1.30 (ISO 1183)[1][2][5][6]1.25 (Bambu Lab) to 1.34 (3DXTech), ISO 1183; Prusament 1.27[3][7][4]
Typical priceUSD/kg1 kg spools cluster near 20[8][9][10]1 kg-equivalent spools span 16–74; the middle of the market is about 29[3][10][11][12][13][14][15][16]
Price range across brandsUSD/kg12–70 across brands; IEMAI 12, ELEGOO 14, CHCKX 14, Bambu Lab 18–20, Hatchbox 26, Prusament 38, Prusament PETG V0 70[8][9][17][10][18][19]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[20][3][21][10][11][12][13][14][15][16]
Market availability1–5Ubiquitous, every brand and retailer[8][9][20][10]Stocked by most mainstream brands[3][21][10][20]
Spool sizes & diameters1.75 and 2.85 mm; 0.75, 0.8 and 1 kg spools plus spool-less refills[9][10]1.75 and 2.85 mm; 0.75 and 1 kg spools[21][3]
Typical applicationsFunctional parts, enclosures and outdoor fittings that need more toughness and heat tolerance than PLA[1][2]Stiff functional parts and fixtures where PETG's toughness is traded for rigidity and a matte finish[3][4]
Diameter tolerance± mm±0.02 (Prusament)[1]±0.02 (Prusament)[4]
Printing Parameters
Nozzle temperature°C230–260 across brands; Prusament 250 ± 10, Polymaker 240–260[1][2][6]240–270 (Bambu Lab); 265 ± 10 (Prusament)[3][4]
Bed temperature°C60–90; Prusament 80 ± 10, Polymaker 60–70[1][6]65–75 (Bambu Lab); 90 ± 10 (Prusament)[3][4]
Enclosure / chamber requirement1–5Open frame is fine[6]Open frame fine; draught shield helps — Bambu Lab specifies a 35–50 °C chamber[3]
Recommended chamber temperature°CNot documented35–50 (Bambu Lab)[3]
Part cooling fanAround 50 %; Polymaker specifies 20–60 %, less than PLA to protect layer bonding[1][6]0–60 % (Bambu Lab); 50 % (Prusament)[3][4]
Bed surface & adhesion aidTextured PEI, satin or powder-coated sheets. On smooth PEI a glue stick is used as a release agent, not an adhesive — PETG bonds to bare PEI hard enough to tear the sheet[1][6]Textured PEI or engineering plate with glue (Bambu Lab)[3]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s8–15 (PrusaSlicer guidance); My Tech Fun ran Bambu Lab PETG Basic at 13 mm³/s[22][23]11.5 on My Tech Fun's Bambu Lab PETG-CF profile[23]
Warping tendency1–5Slight — corner lift on large flat parts[1][6]Not documented
Bed-adhesion difficulty1–5Needs the right surface or a thin adhesive — the problem is releasing the part, not sticking it[1]Needs the right surface or a thin adhesive[3]
Stringing / oozing tendency1–5Moderate — retraction tuning needed[1][6]Slight — the fibre reduces stringing against unfilled PETG[3][24]
Overall printing difficulty1–5Easy — minor profile tuning[6]Intermediate — dry filament and a tuned profile; hardened nozzle mandatory[3]
Hardware Wear & Reliability
Nozzle hardness required1–4Brass fine indefinitely[22]Hardened steel required[3]
Abrasiveness1–5Non-abrasive[6]Highly abrasive — standard CF composite[3]
Nozzle clog risk1–5Low — no special hot-end required and clogging is not among the listed drawbacks; Prusa lists no drybox and no hardened nozzle[24][25]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[26][27]
Heat-creep / jam sensitivity1–5Slightly sensitive[24]Slightly sensitive[24]
Hotend requirementNo special hot-end required[24]Hardened steel nozzle; no high-temperature hot-end needed[3][24]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate (0.3–0.8 %) — Bambu Lab reports 0.40 % saturated at 25 °C / 55 % RH; Prusa measures only 0.07 % in 24 h and 0.10 % in 7 days at the drier 22 % RH[1][28]Low — 0.30 % saturated at 25 °C / 55 % RH (Bambu Lab)[3]
Equilibrium moisture content at ~50 % RH%0.10 after 7 days at 24 °C / 22 % RH (Prusa Polymers); 0.40 saturated at 25 °C / 55 % RH (Bambu Lab)[1][28]0.30 saturated at 25 °C / 55 % RH (Bambu Lab); Prusa measures 0.10 after 7 days at 22 % RH[3][4]
Drying temperature & time60–65 °C for 6–8 h[6][28]65 °C for 8 h (Bambu Lab)[3]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[1]Bubbling and popping at the nozzle, stringing and a rough surface[29]
Effect of moisture on strengthPolymaker groups PETG with nylon, PVA and TPU as highly hygroscopic and shows a before-and-after-drying comparison; the loss appears as poor layer adhesion and weak, brittle layers rather than a published dry-versus-conditioned figure[29]No dry-versus-conditioned figures published; Bambu Lab states PETG-CF must be properly dried before printing and stored dry after use[3][29]
Storage requirementSealed with desiccant; Polymaker groups PETG with the highly hygroscopic materials[29][30]Sealed with desiccant; Bambu Lab says store dry after use[3][29]
Mechanical Properties
Tensile strength (XY)MPa38–51 (printed XY, ISO 527); Prusament 47 ± 2 at yield; 62 on My Tech Fun 4×4 mm bars[1][2][5][31]35 ± 5 (Bambu Lab) and 47 ± 2 at yield (Prusament) printed XY, ISO 527; 56 at break for 3DXTech[3][4][7]
Young's modulusMPa1500–2311 (printed XY, ISO 527)[1][2][5][6]2460 ± 230 (Bambu Lab) and 1700 (Prusament) printed XY, ISO 527[3][4]
Elongation at break%5.2–9.3 at break (printed XY, ISO 527); Prusament 5.1 at yield[2][5][6][1]4.3 at yield (Prusament, printed XY, ISO 527); 3 at break for 3DXTech[4][7]
Flexural strengthMPa58–80 (printed XY, ISO 178); Prusament 66 ± 2[1][2][5][6]68 ± 3 printed horizontal, ISO 178 (Prusament)[4]
Flexural modulusMPa1068–2277 (printed XY, ISO 178)[1][2][5][6]2300 printed horizontal, 3100 printed vertical, ISO 178 (Prusament)[4]
Charpy impact, notchedkJ/m²2.6 (PolyLite) to 11.6 (PolyMax) printed XY, ISO 179, notched; Prusament 6 ± 1[2][5][1]Not documented
Other impact dataCharpy unnotched does not break on Prusa's 4 J pendulum (ISO 179-1); Izod 3.37 kJ/m² on My Tech Fun printed bars[1][31]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][23]
Layer adhesion / Z tensileMPa18 ± 4 (Prusa interlayer adhesion test); 42.8 printed Z for PolyLite PETG; 33 on My Tech Fun bars[1][2][31]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][23]
Brittleness1–5Moderate[1][2]Brittle — snaps with little warning[7]
Hardness (scale-specific)Shore A / Shore D / Rockwell74 Shore D (Prusa Polymers method); measured on printed bars at 68.2 for Extrudr PETG, 72 for Fiberlogy PETG and 72.8 for Prusament PETG[1][31][32][33]77 Shore D (Prusa Polymers method)[4]
Creep resistance / sustained load1–5Below average — a 12 mm bar sagged to 18.2 mm (Fiberlogy) and 19.4 mm (Bambu Lab Basic) over 5 days at 1.25 kg[31][23]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[23]
Fatigue / repeated-flex resistance1–5Moderate — 79 000–193 000 cycles at 30 % of tensile strength, about three times printed PLA (R = 0.2, 7 Hz)[34]Moderate — no CF-grade S-N curve; unfilled printed PETG ran 79 000–193 000 cycles at 30 % of tensile strength[34]
Elasticity / flexibility1–5Slightly flexible in thin sections[1]Rigid[3]
Z strength as % of XY%84 (PolyLite, printed Z against XY tensile)[2]83 (Bambu Lab, printed Z against XY tensile)[3]
Thermal Properties
HDT at 0.45 MPa°C68 (Prusament) to 78 (PolyLite), ISO 75 at 0.45 MPa[1][2][6]74 (Bambu Lab) and 96 (Prusament), ISO 75 at 0.45 MPa[3][4]
HDT at 1.8 MPa°C65 (Polymaker) to 75 (PolyLite), ISO 75 at 1.8 MPa; Prusament 68[1][2][6]68 (Bambu Lab) and 80 (Prusament), ISO 75 at 1.8 MPa[3][4]
Glass transition (Tg)°C71–81 (DSC)[2][5][6]68 (Bambu Lab) and 80 (3DXTech), DSC[3][7]
Melting point / Vicat°CAmorphous — no melting point; Vicat 75–84 (ISO 306)[2][5][6]225 melting (Bambu Lab, DSC) — the carbon fibre lets the PET fraction crystallise[3]
Continuous service temperature°C61–66 — loaded bars begin to move at this temperature across six grades from four brands; Prusa publishes 68 for Prusament PETG[31][32][33][23][35]77 — loaded bars begin to move at this temperature, against 61 for Bambu Lab PETG Basic[23]
Thermal expansion (CTE)µm/m·K65 at 30 °C (neat PETG, large-format printed bead, TMA)[36]Not documented
Flammability / UL 94Flammable; no UL 94 rating published for standard PETG, though flame-retardant V0 grades exist[37][30]Flammable; no UL 94 rating published[3]
Environment & Chemical
UV resistance1–5Moderate — a season or two[1]Moderate — a season or two; the carbon fibre does not add UV stabilisation[30]
Chemical resistanceWithstands acids, alkalis, oils and UV exposure — Polymaker names outdoor use as a result[30]Withstands acids, alkalis, oils and UV exposure, as for unfilled PETG[30]
Water / humidity resistance in service1–5Good — minor absorption[1]Not documented
Food contactPET is the polymer of drinks bottles, but printed layer grooves harbour bacteria and no filament here carries a food-contact certification[30]Not certified for food contact[30]
Biodegradability / compostabilityNot biodegradable[30]Not biodegradable[30]
RecyclabilityPET is widely recycled as bottle stock, but printed PETG waste is not accepted in household collection[30]Fibre-filled PETG is not accepted in household plastic collection[30]
Electrical & ESD propertiesNot documentedSurface resistance above 10⁹ ohm/sq — carbon fibre at this loading is not static-dissipative (3DXTech)[7]
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[38]Moderate — measurable VOCs and UFPs, ventilation advised[38]
Ultrafine-particle emission rateparticles/min≈5 × 10⁹ median for the PET-based T-Glase filament in the same chamber study, against ≈1 × 10⁸ for PLA[38]Not documented
Ventilation / filtration requirement1–5Open a window / occasional ventilation[38]Open a window / occasional ventilation[38]
Dust & fibre handling hazardNot documentedCarbon fibre is bound in the matrix; sanding dust should not be inhaled[7]
Post-Processing
Sanding & machiningSands poorly — the material is tough and gums rather than powders[24]Sands to a matte finish more readily than unfilled PETG[24]
Painting & finishingPaint adheres poorly without abrasion and a primer[1]Not documented
Gluing & solvent weldingCyanoacrylate; no common solvent welds PETG cleanly[24]Cyanoacrylate; no common solvent welds it[24]
Vapour / chemical smoothingNo practical vapour smoothing[1]No practical vapour smoothing[24]
Support material pairingPrints its own supports; Polymaker rates PolyDissolve S1 for PETG[24]Support for PLA or its own material (Bambu Lab)[3]
Dimensional accuracy & detailStringing and blobbing are the usual accuracy limits, not shrinkage[1][6]Matte finish hides layer lines; stringing is reduced against unfilled PETG[3]
Solvents & Solubility
Soluble inNo common workshop solvent; 1,2-dichloroethane destroys it inside a week and dichloromethane — a carcinogen — dissolves the surface.[39][40]No common workshop solvent; dichloromethane — a carcinogen — dissolves the matrix surface, 1,2-dichloroethane destroys it in a week.[39][40]
Softened or crazed byAcetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[39]Acetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[39]
Solvent welding & smoothing agentDichloromethane brushed on is the only agent that smooths PETG — a controlled carcinogen, not workshop stock.[40]Dichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[40]

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. Prusament PETG Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  2. PolyLite PETG Technical Data Sheet Polymaker Wiki · 2026-08 · 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. PolyMax PETG Technical Data Sheet Polymaker Wiki · 2026-08 · tds
  6. Polymaker PETG Technical Data Sheet Polymaker Wiki · 2026-08 · tds
  7. CarbonX Carbon Fiber PETG Technical Data Sheet 3DXTech · 2026-08 · tds
  8. PETG Basic — product page Bambu Lab US Store · 2026-08 · vendor
  9. Polymaker product catalogue Polymaker · 2026-08 · vendor
  10. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  11. SUNLU PETG-CF (PETG Carbon Fiber) 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  12. Fibreheart PETG-CF Pro Filament product page Siraya Tech · 2026-08 · vendor
  13. IEMAI CF-PETG 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  14. Reli3D Carbon Fiber PETG Filament 1.75 mm, 1 kg Reli3D (Amazon US) · 2026-08 · vendor
  15. PET-G CF15 Sakata 3D Filaments · 2026-08 · vendor
  16. Filament PM CFJet technical data sheet (TDS CFJet ENG.pdf) Filament PM (Plasty Mladec) · 2026-08 · tds
  17. Black PETG Filament 1.75 mm 1 kg — product data Hatchbox · 2026-08 · vendor
  18. IEMAI PETG 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  19. CHCKX PETG 3D Printer Filament 1.75 mm 1 kg, Black CHCKX (Amazon US) · 2026-08 · vendor
  20. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  21. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  22. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  23. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  24. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  25. Filament Material Guide Prusa Knowledge Base · 2026-08 · doc
  26. CARBONX PETG+CF — product page (print recommendations) 3DXTech · 2026-08 · doc
  27. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  28. Bambu Filament Technical Data Sheet — PETG HF Bambu Lab · 2026-08 · tds
  29. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  30. PETG — material basics Polymaker Wiki · 2026-08 · doc
  31. PCTG vs PETG comparison — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  32. Extrudr PETG vs PCTG vs XPETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  33. Prusament PETG-CF vs PETG V0 vs PETG — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  34. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  35. Prusament PETG — material page Prusa Polymers · 2026-08 · doc
  36. Effects of Fiber Orientation on the Coefficient of Thermal Expansion of Fiber-Filled Polymer Systems in Large Format Polymer Extrusion-Based Additive Manufacturing Materials 15(8):2764 · 2022-04 · paper
  37. Prusament PETG V0 Technical Datasheet Prusa Polymers · 2026-08 · tds
  38. 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
  39. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  40. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc