3D Printing Info

Filament comparison

PEI 1010 vs PETG

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

PEI (ULTEM 1010) guidePETG guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PEI 1010 comparisonsMore PETG comparisons
PEI 1010 vs PETG — documented properties and sources
PropertyPEI (ULTEM 1010)HIGHTEMPPETGPETG
Market snapshot
Listing priceUSD/kg; dated snapshots$281.22/kg median; $195.00–$698.00/kg across 6 dated product listings$19.99/kg median; $8.99–$69.99/kg across 21 dated product listings
Identity & Market
Base polymer / chemistryPolyetherimide, ULTEM 1010 grade — the higher-temperature, food- and medical-contact PEI[1][2]Polyethylene terephthalate glycol copolymer — PET with a glycol comonomer that suppresses crystallisation[3][4]
Densityg/cm³1.27 (ISO 1183, 3DXTech and Prusament); 1.29 specific gravity on moulded plaques (ASTM D792, Stratasys)[1][2][5]1.24–1.30 (ISO 1183)[3][4][6][7]
Typical priceUSD/kg1 kg-equivalent spools span 195–698; the middle of the market is about 270[8][9][10][11][12]1 kg spools cluster near 20[13][14][15]
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[8][9][10][11][12]12–70 across brands; IEMAI 12, ELEGOO 14, CHCKX 14, Bambu Lab 18–20, Hatchbox 26, Prusament 38, Prusament PETG V0 70[13][14][16][15][17][18]
Market availability1–5Niche, a handful of specialist brands[8][9][10][11]Ubiquitous, every brand and retailer[13][14][19][15]
Spool sizes & diameters1.75 and 2.85 mm; 200 g to 2 kg spools, plus Stratasys canisters[8][11][5]1.75 and 2.85 mm; 0.75, 0.8 and 1 kg spools plus spool-less refills[14][15]
Typical applicationsAutoclavable tooling, food-contact fixtures and parts that must hold load near 200 °C[2]Functional parts, enclosures and outdoor fittings that need more toughness and heat tolerance than PLA[3][4]
Diameter tolerance± mmNot documented±0.02 (Prusament)[3]
Printing Parameters
Nozzle temperature°C410 ± 10 (Prusament) — the hottest nozzle in the dataset[2]230–260 across brands; Prusament 250 ± 10, Polymaker 240–260[3][4][7]
Bed temperature°C140–160 (Prusament); 130–140 (3DXTech)[2][1]60–90; Prusament 80 ± 10, Polymaker 60–70[3][7]
Enclosure / chamber requirement1–5Actively heated chamber required — Prusa specifies 90 °C[2]Open frame is fine[7]
Recommended chamber temperature°C90 (Prusament)[2]Not documented
Part cooling fanNot documentedAround 50 %; Polymaker specifies 20–60 %, less than PLA to protect layer bonding[3][7]
Bed surface & adhesion aidPA nylon sheet or powder-coated sheet with high-temperature glue (Prusament)[2]Textured 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[3][7]
Maximum volumetric flow (mm³/s; see test conditions)mm³/sNot documented8–15 (PrusaSlicer guidance); My Tech Fun ran Bambu Lab PETG Basic at 13 mm³/s[20][21]
Warping tendency1–5Severe — heated chamber needed[2]Slight — corner lift on large flat parts[3][7]
Bed-adhesion difficulty1–5Not documentedNeeds the right surface or a thin adhesive — the problem is releasing the part, not sticking it[3]
Stringing / oozing tendency1–5Not documentedModerate — retraction tuning needed[3][7]
Overall printing difficulty1–5Expert / industrial hardware only[2][22]Easy — minor profile tuning[7]
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]Brass fine indefinitely[20]
Abrasiveness1–5Non-abrasive when unfilled[1]Non-abrasive[7]
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]Low — no special hot-end required and clogging is not among the listed drawbacks; Prusa lists no drybox and no hardened nozzle[24][25]
Heat-creep / jam sensitivity1–5Not documentedSlightly sensitive[24]
Hotend requirementNot documentedNo special hot-end required[24]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Not documentedModerate (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[3][26]
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]0.10 after 7 days at 24 °C / 22 % RH (Prusa Polymers); 0.40 saturated at 25 °C / 55 % RH (Bambu Lab)[3][26]
Drying temperature & time150 °C for 6–8 h (Prusament) — the hottest drying schedule in the dataset[2]60–65 °C for 6–8 h[7][26]
Symptoms when wetNot documentedBubbling and popping at the nozzle, stringing and a rough surface[3]
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]Polymaker 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[27]
Storage requirementNot documentedSealed with desiccant; Polymaker groups PETG with the highly hygroscopic materials[27][28]
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]38–51 (printed XY, ISO 527); Prusament 47 ± 2 at yield; 62 on My Tech Fun 4×4 mm bars[3][4][6][29]
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]1500–2311 (printed XY, ISO 527)[3][4][6][7]
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]5.2–9.3 at break (printed XY, ISO 527); Prusament 5.1 at yield[4][6][7][3]
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]58–80 (printed XY, ISO 178); Prusament 66 ± 2[3][4][6][7]
Flexural modulusMPa2910-3260 printed XZ (ASTM D790, Stratasys); Prusament 2300 horizontal and 2700 vertical (ISO 178); 3DXTech quotes 2510[5][2][1]1068–2277 (printed XY, ISO 178)[3][4][6][7]
Charpy impact, notchedkJ/m²3.4 ± 0.9 printed horizontal and 3.6 ± 0.4 printed vertical, ISO 179-1 notched (Prusament)[2]2.6 (PolyLite) to 11.6 (PolyMax) printed XY, ISO 179, notched; Prusament 6 ± 1[4][6][3]
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 does not break on Prusa's 4 J pendulum (ISO 179-1); Izod 3.37 kJ/m² on My Tech Fun printed bars[3][29]
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]18 ± 4 (Prusa interlayer adhesion test); 42.8 printed Z for PolyLite PETG; 33 on My Tech Fun bars[3][4][29]
Brittleness1–5Brittle — snaps with little warning; notched Charpy only 3.4 kJ/m²[2]Moderate[3][4]
Hardness (scale-specific)Shore A / Shore D / RockwellShore D 83.5 (Prusa Polymers method); Rockwell M110 / R126 on extruded PEI stock (ASTM D785)[2][30]74 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[3][29][31][32]
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][30]Below 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[29][21]
Fatigue / repeated-flex resistance1–5Not documentedModerate — 79 000–193 000 cycles at 30 % of tensile strength, about three times printed PLA (R = 0.2, 7 Hz)[33]
Elasticity / flexibility1–5Rigid[2]Slightly flexible in thin sections[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]84 (PolyLite, printed Z against XY tensile)[4]
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]68 (Prusament) to 78 (PolyLite), ISO 75 at 0.45 MPa[3][4][7]
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]65 (Polymaker) to 75 (PolyLite), ISO 75 at 1.8 MPa; Prusament 68[3][4][7]
Glass transition (Tg)°C209 (moulded plaque, ASTM D7426 inflection point, Stratasys); 217 (DSC, 3DXTech)[5][1]71–81 (DSC)[4][6][7]
Melting point / Vicat°CNot documentedAmorphous — no melting point; Vicat 75–84 (ISO 306)[4][6][7]
Continuous service temperature°C170 long-term service on extruded PEI stock, converted from 338 °F; 200 short term[30]61–66 — loaded bars begin to move at this temperature across six grades from four brands; Prusa publishes 68 for Prusament PETG[29][31][32][21][34]
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]65 at 30 °C (neat PETG, large-format printed bead, TMA)[35]
Flammability / UL 94UL 94 V-0 at 1.5 mm, rated on the base resin[1]Flammable; no UL 94 rating published for standard PETG, though flame-retardant V0 grades exist[36][28]
Environment & Chemical
UV resistance1–5Not documentedModerate — a season or two[3]
Chemical resistanceNot documentedWithstands acids, alkalis, oils and UV exposure — Polymaker names outdoor use as a result[28]
Water / humidity resistance in service1–5Not documentedGood — minor absorption[3]
Food contactNot documentedPET is the polymer of drinks bottles, but printed layer grooves harbour bacteria and no filament here carries a food-contact certification[28]
Biodegradability / compostabilityNot documentedNot biodegradable[28]
RecyclabilityNot documentedPET is widely recycled as bottle stock, but printed PETG waste is not accepted in household collection[28]
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[37]Moderate — measurable VOCs and UFPs, ventilation advised[37]
Ultrafine-particle emission rateparticles/minNot documented≈5 × 10⁹ median for the PET-based T-Glase filament in the same chamber study, against ≈1 × 10⁸ for PLA[37]
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[37]Open a window / occasional ventilation[37]
Post-Processing
Sanding & machiningNot documentedSands poorly — the material is tough and gums rather than powders[24]
Painting & finishingNot documentedPaint adheres poorly without abrasion and a primer[3]
Gluing & solvent weldingNot documentedCyanoacrylate; no common solvent welds PETG cleanly[24]
Vapour / chemical smoothingNot documentedNo practical vapour smoothing[3]
Support material pairingNot documentedPrints its own supports; Polymaker rates PolyDissolve S1 for PETG[24]
Dimensional accuracy & detailNot documentedStringing and blobbing are the usual accuracy limits, not shrinkage[3][7]
Solvents & Solubility
Soluble inChlorinated hydrocarbons — dichloromethane and chloroform — are solvents for polyetherimide. Laboratory reagents.[38][39]No common workshop solvent; 1,2-dichloroethane destroys it inside a week and dichloromethane — a carcinogen — dissolves the surface.[40][41]
Softened or crazed byAcetone, MEK, benzene, toluene and butyl acetate craze or stress-crack it; alcohols, fuels and dilute acids do not.[39][38]Acetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[40]
Solvent welding & smoothing agentDichloromethane is the only welding route, and it is a controlled carcinogen rather than a workshop material.[38][39]Dichloromethane brushed on is the only agent that smooths PETG — a controlled carcinogen, not workshop stock.[41]

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. Prusament PETG Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  4. PolyLite PETG Technical Data Sheet Polymaker Wiki · 2026-08 · tds
  5. ULTEM 1010 Resin — FDM Material Data Sheet Stratasys · 2026-06 · tds
  6. PolyMax PETG Technical Data Sheet Polymaker Wiki · 2026-08 · tds
  7. Polymaker PETG Technical Data Sheet Polymaker Wiki · 2026-08 · tds
  8. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  9. Kimya PEI-1010 Amber Yellow 1.75 mm 500 g igo3d · 2026-08 · vendor
  10. Prusa Prusament PEI 1010 Natural (NFC), 1.75 mm / 500 g 3DJAKE · 2026-08 · vendor
  11. 3D4Makers product catalogue 3D4Makers · 2026-08 · vendor
  12. IEMAI 3D PEI 1010 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  13. PETG Basic — product page Bambu Lab US Store · 2026-08 · vendor
  14. Polymaker product catalogue Polymaker · 2026-08 · vendor
  15. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  16. Black PETG Filament 1.75 mm 1 kg — product data Hatchbox · 2026-08 · vendor
  17. IEMAI PETG 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  18. CHCKX PETG 3D Printer Filament 1.75 mm 1 kg, Black CHCKX (Amazon US) · 2026-08 · vendor
  19. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  20. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  21. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  22. Prusament PEI 1010 — material page Prusa Polymers · 2026-08 · doc
  23. THERMAX PEI 1010 — product page (print recommendations) 3DXTech · 2026-08 · doc
  24. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  25. Filament Material Guide Prusa Knowledge Base · 2026-08 · doc
  26. Bambu Filament Technical Data Sheet — PETG HF Bambu Lab · 2026-08 · tds
  27. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  28. PETG — material basics Polymaker Wiki · 2026-08 · doc
  29. PCTG vs PETG comparison — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  30. TECAPEI natural (PEI) — stock shape properties Ensinger · 2026-08 · tds
  31. Extrudr PETG vs PCTG vs XPETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  32. Prusament PETG-CF vs PETG V0 vs PETG — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  33. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  34. Prusament PETG — material page Prusa Polymers · 2026-08 · doc
  35. 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
  36. Prusament PETG V0 Technical Datasheet Prusa Polymers · 2026-08 · tds
  37. 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
  38. Radel PPSU, Veradel PESU, Acudel modified PPSU Design Guide — environmental stress cracking tables Solvay Specialty Polymers · 2026-08 · tds
  39. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  40. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  41. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc