3D Printing Info

Filament comparison

PC-GF vs PEI 9085

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

Glass-fibre PC (PC-GF) guidePEI (ULTEM 9085) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PC-GF comparisonsMore PEI 9085 comparisons
PC-GF vs PEI 9085 — documented properties and sources
PropertyGlass-fibre PC (PC-GF)PCPEI (ULTEM 9085)HIGHTEMP
Market snapshot
Listing priceUSD/kg; dated snapshots$71.27/kg median; $71.27–$71.27/kg across 1 dated product listings$309.80/kg median; $220.00–$392.00/kg across 6 dated product listings
Identity & Market
Base polymer / chemistryPolycarbonate reinforced with 30 wt% short glass fibre[1]Polyetherimide, ULTEM 9085 grade — the flame-retardant PEI used for aircraft interiors[2]
Densityg/cm³1.17 (measured on a 100 % infill printed part, ISO 1183-A)[1]1.34 (ISO 1183, 3DXTech) against 1.27 specific gravity on moulded plaques (ASTM D792, Stratasys) — the two suppliers disagree[2][3]
Typical priceUSD/kg1 kg spools cluster near 71[4]1 kg-equivalent spools cluster near 298[5][6][7][8]
Price range across brandsUSD/kg71 — BASF Ultrafuse PC GF30 at igo3d is the only priced listing found; Owens Corning sells XSTRAND GF30-PC in 500 g and 1 kg[4][1]220-392 across brands and formats; 3DXTech ThermaX PEI 9085 220 at 2 kg, 3D4Makers 270 at 2 kg, Fiberlogy 298 at 500 g, Kimya 321 at 500 g, IEMAI 3D 385 at 1 kg, 3DXTech CarbonX PEI 9085+CF 392[5][6][7][8][9]
Market availability1–5Niche, a handful of specialist brands — neither Polymaker's nor 3DXTech's polycarbonate range contains a glass-fibre grade, but BASF Forward AM and Owens Corning both sell one through European retail[4][1][10][5]Niche, a handful of specialist brands[5][6][7][8]
Spool sizes & diameters1.75 and 2.85 mm at +/- 0.05 mm; 500 g and 1 kg net spools[1]1.75 and 2.85 mm; 250 g to 2 kg spools, plus Stratasys canisters[5][8][3]
Typical applicationsFunctional prototyping for mechanical engineering, electronics and automotive[1]Aircraft interior parts and rail rolling stock, where the flame, smoke and toxicity rating is the requirement[2]
Diameter tolerance± mm+/- 0.05 (Owens Corning XSTRAND)[1]Not documented
Printing Parameters
Nozzle temperature°C280-330 (Owens Corning XSTRAND GF30-PC)[1]Not documented
Bed temperature°C80-110 (Owens Corning XSTRAND GF30-PC)[1]130–140 (3DXTech)[2]
Enclosure / chamber requirement1–5Enclosure required (passive) — as for unfilled PC[11][12]Actively heated chamber required[13][14]
Bed surface & adhesion aidPerforated plate, DimaFix or Magigoo PC glue (Owens Corning)[1]Not documented
Warping tendency1–5Not documentedSevere — heated chamber needed[13]
Overall printing difficulty1–5Not documentedExpert / industrial hardware only[13][14]
Extruder requirementOwens Corning specifies a nozzle above 0.4 mm and hardened steel nozzles and drive wheels[1]Not documented
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — Owens Corning states glass reinforcement shortens brass nozzle and drive-wheel life[1]Brass fine indefinitely for unfilled grades, but brass softens near these nozzle temperatures — hardened or plated hot ends are the norm[13]
Abrasiveness1–5Highly abrasive — 30 wt% glass fibre[1]Non-abrasive when unfilled[2]
Nozzle clog risk1–5High — jams from moisture, heat creep or particles; PC already absorbs water from the air and Prusa lists glass-filled composites as a higher clogging risk[15][16]Moderate — needs dry filament and a clean nozzle; 3DXTech lists no special nozzle concerns but a mandatory 120 °C pre-dry before every print[17]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Negligible (<0.1 % EMC) — Owens Corning measures below 0.1 % at 23 °C and 50 % RH (ISO 62)[1]Not documented
Equilibrium moisture content at ~50 % RH%Below 0.1 at 23 °C and 50 % RH, and below 0.1 at saturation (ISO 62)[1]Not documented
Effect of moisture on strengthNo dry-versus-conditioned figures are published. Polymaker calls PC highly hygroscopic; absorbed water flashes to steam and shows as bubbling and poor layer adhesion[18][19]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[17]
Mechanical Properties
Tensile strength (XY)MPa65 at break (printed, ISO 527 at 1 mm/min)[1]63-77 at break (printed XZ, ASTM D638, Stratasys F900/F3300/Fortus 450mc, three tips and two colours); 54 (printed XY, ISO 527, 3DXTech)[3][2]
Young's modulusMPa5400 (printed, ISO 527 at 1 mm/min)[1]2040-2540 (printed XZ, ASTM D638, Stratasys); 2050 (printed XY, ISO 527, 3DXTech)[3][2]
Elongation at break%2.5 at break (printed, ISO 527 at 1 mm/min)[1]5.4-9.1 at break (printed XZ, ASTM D638, Stratasys); 1.9-4.3 in ZX; 3DXTech quotes 3 (ISO 527)[3][2]
Flexural strengthMPa113 at yield (printed, ISO 178 at 2 mm/min)[1]104-116 at break (printed XZ, ASTM D790 Procedure A, Stratasys); 72-98 in ZX; 3DXTech quotes 90 (ISO 178)[3][2]
Flexural modulusMPa5500 (printed, ISO 178 at 2 mm/min)[1]2400-2550 (printed XZ, ASTM D790, Stratasys F900 T16 and T16A) against 2120-2130 in ZX; 3DXTech quotes 2170 (ISO 178)[3][2]
Other impact dataNot documentedIzod notched 88.5-140 J/m XZ against 37-80 J/m ZX; unnotched 647-2260 J/m XZ against 169-633 J/m ZX (printed, ASTM D256/D4812, Stratasys, across three printers and three tips)[3]
Layer adhesion / Z tensileMPaNot documented39-63 at break (printed ZX, ASTM D638, Stratasys); the low end is the F900 T16 baseline, the high end the F3300 N500 hot end[3]
Brittleness1–5Brittle — snaps with little warning; 2.5 % elongation at break[1]Brittle — snaps with little warning[2]
Hardness (scale-specific)Shore A / Shore D / RockwellRockwell 70 (118) — the source does not name the scales and Shore D 79 on extruded unfilled PC stock (ASTM D785, D2240); no figure is published for a glass-fibre grade[20]Rockwell M110 / R126 on extruded PEI stock (ASTM D785)[21]
Creep resistance / sustained load1–5Excellent — holds load for years. Room-temperature tensile creep of moulded unfilled PC ran unbroken at 41 MPa until the test was stopped, and 30 wt% glass raises the tensile modulus from about 2.3 to 5.4 GPa[22][1]Excellent — holds load for years. Printed ZX coupons keep 87 % of room-temperature tensile strength at 104 °C and 70 % at 132 °C (ASTM D638); extruded PEI stock is rated 170 °C long-term service[3][21]
Elasticity / flexibility1–5Rigid[1]Rigid[2]
Z strength as % of XY%Not documented56-86 (Stratasys ZX against XZ tensile at break, ASTM D638, across F900/F3300/Fortus 450mc and T16/T20/T40A tips); 58 on the F900 T16 baseline[3]
Thermal Properties
HDT at 0.45 MPa°CNot documented158 (printed XY, ISO 75 at 0.45 MPa, 3DXTech) to 178 (printed XY 178.2 and ZX 178.4, ASTM D648 Method B at 66 psi, Stratasys); moulded 176.9[2][3]
HDT at 1.8 MPa°C137 (printed, ISO 75 Method A at 1.8 MPa)[1]170-173 (printed XY 170.2 and ZX 172.6, ASTM D648 Method B at 264 psi); moulded 172.9[3]
Glass transition (Tg)°C145 (DSC, ISO 11357)[1]177 (moulded plaque, ASTM D7426 inflection point, Stratasys); 186 (DSC, 3DXTech)[3][2][23]
Melting point / Vicat°C270 stated as melting point (ISO 11357) — unusual for an amorphous polymer, but this is the published figure[1]Not documented
Continuous service temperature°CNot documented170 long-term service on extruded PEI stock, converted from 338 °F; 200 short term[21]
Thermal expansion (CTE)µm/m·K26.2 in XY and 77.4 in Z (printed, ISO 11359-2) — a threefold anisotropy, and the lowest in-plane expansion of any polycarbonate here[1]44.9 (printed XY, -50 to 80 °C, ASTM E831), falling to 31.4 over 80-160 °C; ZX gives 44.5 over -50 to 60 °C. Black pigment raises it to 51.9[3]
Flammability / UL 94UL 94 V-0 verified (Owens Corning)[1]UL 94 V-0 at 1.5 mm on the base resin. Printed parts are tested to 14 CFR 25.853, BSS 7238 and 7239 and AITM 2.0007B and 3.0005 covering 60 s and 12 s vertical burn, 15 s horizontal burn, smoke density, toxic gas emission and OSU heat release[2][3]
Environment & Chemical
UV resistance1–5Good — years with some colour shift. Owens Corning lists UV resistance as a product benefit but publishes no exposure data[1]Good — years with some colour shift. 1000 h of QUV cycling to ASTM G154 left printed ZX coupons at 55.5 MPa yield against 56.0 unexposed, with elongation and modulus unchanged[3]
Water / humidity resistance in service1–5Excellent — essentially unaffected; below 0.1 % water at saturation (ISO 62)[1]Not documented
Electrical & ESD propertiesElectrically insulating (Owens Corning)[1]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[24]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[24]
Ultrafine-particle emission rateparticles/min≈4 × 10¹⁰ median — the highest ultrafine-particle rate of the nine filaments in the chamber study, above every ABS tested[24]Not documented
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[24][12]Ventilated room or enclosure recommended[24]
Dust & fibre handling hazardOwens Corning warns that the glass reinforcement is abrasive when melted and advises sufficient ventilation and avoiding extrusion fumes[1]Not documented
Post-Processing
Dimensional accuracy & detailHigh dimensional stability is the headline benefit; the 26.2 um/m*K in-plane CTE is a third of unfilled PC's[1]Not documented
Solvents & Solubility
Soluble inDichloromethane and chloroform dissolve the matrix and leave the fibre; DMF and dioxane do the same (Covestro).[25]Chlorinated hydrocarbons — dichloromethane and chloroform — are solvents for polyetherimide. Laboratory reagents.[26][27]
Softened or crazed byMethanol, butyl acetate, ether, 1 % NaOH and phthalate plasticisers stress-crack it; acetone, MEK and xylene swell it.[25]Acetone, MEK, benzene, toluene and butyl acetate craze or stress-crack it; alcohols, fuels and dilute acids do not.[27][26]
Solvent welding & smoothing agentDichloromethane cement welds the resin, but the fibre keeps the joint from flowing closed. Controlled carcinogen.[28]Dichloromethane is the only welding route, and it is a controlled carcinogen rather than a workshop material.[26][27]

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. XSTRAND GF30-PC Data Sheet Owens Corning · 2019-04 · tds
  2. ThermaX PEI 9085 Technical Data Sheet v4 3DXTech · 2026-08 · tds
  3. ULTEM 9085 Resin — FDM Material Data Sheet Stratasys · 2026-04 · tds
  4. BASF Ultrafuse PC GF30 Black 2.85 mm 1.000 g igo3d · 2026-08 · vendor
  5. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  6. Kimya PEI-9085 Natural 2.85 mm 500 g igo3d · 2026-08 · vendor
  7. Fiberlogy PEI 9085 Natural, 1.75 mm / 500 g 3DJAKE · 2026-08 · vendor
  8. 3D4Makers product catalogue 3D4Makers · 2026-08 · vendor
  9. IEMAI 3D PEI 9085 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  10. Polymaker product catalogue Polymaker · 2026-08 · vendor
  11. PolyLite PC Technical Data Sheet V5.4 Polymaker · 2024-11 · tds
  12. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  13. Prusament PEI 1010 Technical Datasheet v1.0 Prusa Polymers · 2024-09 · tds
  14. Prusament PEI 1010 — material page Prusa Polymers · 2026-08 · doc
  15. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  16. Polycarbonate — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  17. THERMAX PEI 9085 — product page (print recommendations) 3DXTech · 2026-08 · doc
  18. PC — material basics Polymaker Wiki · 2026-08 · doc
  19. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  20. TECANAT natural (PC) — stock shape properties Ensinger · 2026-08 · tds
  21. TECAPEI natural (PEI) — stock shape properties Ensinger · 2026-08 · tds
  22. Experimental data for creep and dynamic mechanical properties of polycarbonate and polycarbonate/ABS Data in Brief 42:108264 · 2022-06 · paper
  23. ThermaX PEI 1010 Technical Data Sheet v4 3DXTech · 2026-08 · tds
  24. 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
  25. Makrolon — The chemical resistance (Makrolon 2800, 6 days at 23 °C and 50 °C) Covestro · 2016-12 · tds
  26. Radel PPSU, Veradel PESU, Acudel modified PPSU Design Guide — environmental stress cracking tables Solvay Specialty Polymers · 2026-08 · tds
  27. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  28. Weld-On 3 Acrylic Plastic Cement — technical data sheet (shipped as dichloromethane) IPS Corporation · 2002-07 · tds