3D Printing Info

Filament comparison

PA6-GF vs PEI 1010

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

Glass-fibre PA6 (PA6-GF) guidePEI (ULTEM 1010) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PA6-GF comparisonsMore PEI 1010 comparisons
PA6-GF vs PEI 1010 — documented properties and sources
PropertyGlass-fibre PA6 (PA6-GF)PAPEI (ULTEM 1010)HIGHTEMP
Market snapshot
Listing priceUSD/kg; dated snapshots$59.98/kg median; $39.99–$130.00/kg across 6 dated product listings$281.22/kg median; $195.00–$698.00/kg across 6 dated product listings
Identity & Market
Base polymer / chemistryPA6 reinforced with chopped glass fibre — Polymaker's grade is 25 wt%[1][2]Polyetherimide, ULTEM 1010 grade — the higher-temperature, food- and medical-contact PEI[3][4]
Densityg/cm³1.14 (Bambu Lab) and 1.20 (Polymaker Fiberon), ISO 1183[2][1]1.27 (ISO 1183, 3DXTech and Prusament); 1.29 specific gravity on moulded plaques (ASTM D792, Stratasys)[3][4][5]
Typical priceUSD/kg1 kg-equivalent spools span 40–130; the middle of the market is about 60[2][6][7]1 kg-equivalent spools span 195–698; the middle of the market is about 270[8][9][10][11][12]
Price range across brandsUSD/kg40–130 across brands; SUNLU 40, YXPOLYER 45, Polymaker Fiberon and Bambu Lab 60, 3DXTech FibreX 87, Obsidian Nylon 6+GF 130[6][2][8][7][13]195-698 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]
Market availability1–5Stocked by most mainstream brands[2][6][8][7][13]Niche, a handful of specialist brands[8][9][10][11]
Spool sizes & diameters1.75 and 2.85 mm; 0.5, 0.75 and 1 kg spools[6][8][2]1.75 and 2.85 mm; 200 g to 2 kg spools, plus Stratasys canisters[8][11][5]
Typical applicationsStiff, heat-resistant structural parts where a matte finish and lower cost beat carbon fibre[2][1]Autoclavable tooling, food-contact fixtures and parts that must hold load near 200 °C[4]
Printing Parameters
Nozzle temperature°C260–290 (Bambu Lab)[2]410 ± 10 (Prusament) — the hottest nozzle in the dataset[4]
Bed temperature°CNot documented140–160 (Prusament); 130–140 (3DXTech)[4][3]
Enclosure / chamber requirement1–5Enclosure required (passive) — Bambu Lab specifies a 45–60 °C chamber[2]Actively heated chamber required — Prusa specifies 90 °C[4]
Recommended chamber temperature°C45–60 (Bambu Lab)[2]90 (Prusament)[4]
Bed surface & adhesion aidPEI sheet with a glue stick, or a dedicated adhesive such as Magigoo[14][15]PA nylon sheet or powder-coated sheet with high-temperature glue (Prusament)[4]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s10 at Bambu Lab's 130 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer[2][16]Not documented
Warping tendency1–5Not documentedSevere — heated chamber needed[4]
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[14]Not documented
Stringing / oozing tendency1–5Moderate — retraction tuning needed[15]Not documented
Overall printing difficulty1–5Expert / industrial hardware only[2][17]Expert / industrial hardware only[4][18]
Extruder requirement0.6 mm nozzle recommended by Bambu Lab; 0.4 and 0.8 also supported[2]A 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[4]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — Polymaker measures brass nozzle life at about 9 h on PA6-GF25 and recommends hardened steel or ruby[1]Brass fine indefinitely for unfilled grades, but brass softens near these nozzle temperatures — hardened or plated hot ends are the norm[4]
Abrasiveness1–5Highly abrasive — standard GF composite; Polymaker puts brass nozzle life at roughly 9 h on PA6-GF25[1]Non-abrasive when unfilled[3]
Nozzle clog risk1–5Very high — frequent jams without careful setup[17]Moderate — needs dry filament and a clean nozzle; 3DXTech lists no special nozzle concerns but a mandatory 150 °C pre-dry before every print[19]
Heat-creep / jam sensitivity1–5Moderate — good heatbreak cooling needed[14]Not documented
Hotend requirementMay require an all-metal hot end (Simplify3D)[14]Not documented
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Very high (>2 %) — 2.56 % saturated at 25 °C / 55 % RH (Bambu Lab) and 3.33 % equilibrium (Polymaker Fiberon), the highest in the dataset[2][1]Not documented
Equilibrium moisture content at ~50 % RH%2.56 saturated at 25 °C / 55 % RH (Bambu Lab); 3.33 equilibrium (Polymaker Fiberon PA6-GF25)[2][1]0.4 in 24 h and 0.7 in 7 days at 24 °C and 22 % RH (Prusament)[4]
Drying temperature & time80 °C for 8–12 h (Bambu Lab)[2]150 °C for 6–8 h (Prusament) — the hottest drying schedule in the dataset[4]
Symptoms when wetPopping and cracking during extrusion, then hard-to-diagnose defects[20]Not documented
Effect of moisture on strengthPolymaker publishes dry and wet printed blocks for PA6-GF25 itself: at 4.57 % moisture tensile falls 80.1 → 40.2 MPa and modulus 5357 → 1794 MPa, while notched Charpy rises 10.0 → 28.0 kJ/m²[1][20]No 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[19]
Storage requirementSealed below 20 % RH with desiccant[17]Not documented
Hydrolysis at melt temperaturePolymaker specifies an 80–100 °C dry and storage below 20 % RH; no molecular-weight loss figure is published, and the wet data it does publish is conditioning rather than melt hydrolysis[21][22]Not documented
Mechanical Properties
Tensile strength (XY)MPa75 ± 6 (Bambu Lab) and 80.1 ± 1.8 (Polymaker Fiberon, dry/annealed) printed XY, ISO 527; Fiberon falls to 40.2 ± 2.1 conditioned to 4.57 % moisture. Stratasys FDM PA6/66-GF30-FR gives 60.2-61.1 at break and 61.7-62.3 at yield printed XZ (ASTM D638)[2][1][23]79-95 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][4][3]
Young's modulusMPa2850 ± 260 (Bambu Lab) and 5357 ± 211 (Polymaker Fiberon, dry) printed XY, ISO 527; Fiberon falls to 1794 ± 84 conditioned. Stratasys FDM PA6/66-GF30-FR gives 5600-5830 printed XZ against 3050-3140 in ZX (ASTM D638)[2][1][23]2300-3040 printed in plane: Prusament 2300 +/- 100 horizontal (ISO 527-1), Stratasys 2920-3040 in XZ (ASTM D638); 3DXTech quotes 2500[5][4][3]
Elongation at break%2.4 ± 0.2 dry (Polymaker Fiberon) to 3.9 ± 0.8 (Bambu Lab) printed XY, ISO 527; the Fiberon grade rises to 4.2 ± 0.7 conditioned[2][1]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][4][3]
Flexural strengthMPaNot documented128 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][4][3]
Flexural modulusMPa3670 ± 140 printed XY, ISO 178 (Bambu Lab)[2]2910-3260 printed XZ (ASTM D790, Stratasys); Prusament 2300 horizontal and 2700 vertical (ISO 178); 3DXTech quotes 2510[5][4][3]
Charpy impact, notchedkJ/m²10.0 ± 0.7 printed XY dry and 28.0 ± 1.0 conditioned, ISO 179 notched (Polymaker Fiberon); Bambu Lab 7.2 ± 2.3[1][2]3.4 ± 0.9 printed horizontal and 3.6 ± 0.4 printed vertical, ISO 179-1 notched (Prusament)[4]
Other impact dataCharpy unnotched 27.2 ± 2.2 printed XY (Bambu Lab, ISO 179). Stratasys FDM PA6/66-GF30-FR gives Izod notched 74.6-77.1 J/m printed XZ against 17.2-22.1 in ZX (ASTM D256)[2][23]Izod 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][4]
Layer adhesion / Z tensileMPa27 ± 5 (Bambu Lab) and 60.7 ± 1.1 (Polymaker Fiberon, dry) printed Z, ISO 527 — the two makers differ by more than a factor of two; Fiberon falls to 26.3 ± 1.5 conditioned. Stratasys FDM PA6/66-GF30-FR gives 23.7-24.4 at break printed ZX (ASTM D638)[2][1][23]28-37 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][4]
Brittleness1–5Brittle — snaps with little warning; elongation at break 2.4 % in XY[1]Brittle — snaps with little warning; notched Charpy only 3.4 kJ/m²[4]
Hardness (scale-specific)Shore A / Shore D / RockwellRockwell M88 / R117 on extruded PA66-GF30 stock (ASTM D785)[24]Shore D 83.5 (Prusa Polymers method); Rockwell M110 / R126 on extruded PEI stock (ASTM D785)[4][25]
Creep resistance / sustained load1–5Good. Ensinger lists high creep resistance as a headline property of extruded PA66-GF30 stock; the rating is held below Excellent because equilibrium moisture uptake of 3.33 % softens the matrix in service[24][1]Excellent — 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][25]
Fatigue / repeated-flex resistance1–5Good. Ensinger lists high fatigue strength as a headline property of extruded PA66-GF30 stock[24]Not documented
Elasticity / flexibility1–5Rigid[2]Rigid[4]
Z strength as % of XY%36 (Bambu Lab) to 76 (Polymaker Fiberon), printed; Stratasys FDM PA6/66-GF30-FR gives 39-41 (ZX against XZ tensile at break, ASTM D638)[2][1][23]36-40 (Stratasys ZX against XZ tensile at break, ASTM D638) against 76 (Prusament vertical against horizontal tensile yield, ISO 527-1)[5][4]
Thermal Properties
HDT at 0.45 MPa°C182 (Bambu Lab) and 191 (Polymaker Fiberon), ISO 75 at 0.45 MPa. Stratasys FDM PA6/66-GF30-FR gives 161 printed XY and 185 XZ (ASTM D648 at 66 psi)[2][1][23]207 (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[4][5][3]
HDT at 1.8 MPa°C157 (Polymaker Fiberon) and 158 (Bambu Lab), ISO 75 at 1.8 MPa[2][1]194 (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[4][5]
Glass transition (Tg)°C67 (Bambu Lab) and 70.4 (Polymaker Fiberon), DSC; Stratasys measures 51.5 on FDM PA6/66-GF30-FR (ASTM D7426)[2][1][23]209 (moulded plaque, ASTM D7426 inflection point, Stratasys); 217 (DSC, 3DXTech)[5][3]
Melting point / Vicat°C214.5 (Polymaker Fiberon) and 219 (Bambu Lab) melting, DSC; Vicat 210–212 (ISO 306)[2][1]Not documented
Continuous service temperature°CNot documented170 long-term service on extruded PEI stock, converted from 338 °F; 200 short term[25]
Thermal expansion (CTE)µm/m·K48.6 on extruded PA66-GF30 stock (ASTM D696; source states 2.7e-5 in/in/°F). Stratasys measures much higher on printed FDM PA6/66-GF30-FR — 95.4 over -20 to 5 °C and 214 over 25 to 80 °C in XY (ASTM E831)[24][23]36.1 (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]
Flammability / UL 94Flammable; no UL 94 rating published for the grades surveyed[21]UL 94 V-0 at 1.5 mm, rated on the base resin[3]
Environment & Chemical
UV resistance1–5Months outdoors before embrittlement — unstabilised polyamide yellows under UV[15]Not documented
Chemical resistanceWithstands oils, fuels and alkalis[15]Not documented
Water / humidity resistance in service1–5Absorbs water, properties shift[20]Not documented
Food contactNot food-contact certified as filament[15]Not documented
Biodegradability / compostabilityNot biodegradable[15]Not documented
RecyclabilityNot accepted in household plastic collection[15]Not documented
Electrical & ESD propertiesSurface resistivity above 10¹² ohm — insulating (Polymaker Fiberon, ANSI/ESD S11.11)[1]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[26]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[26]
VOC emission rateµg/minUp to 180 caprolactam, the dominant VOC from nylon and the largest single-VOC rate in the study[26]Not documented
Ultrafine-particle emission rateparticles/min≈2 × 10⁸ median for nylon — low for particles despite the highest VOC mass measured[26]Not documented
Hazardous species emittedCaprolactam, at up to 180 µg/min from nylon filament[26]Not documented
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[26]Ventilated room or enclosure recommended[26]
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[1]Not documented
Post-Processing
Sanding & machiningSands poorly — gums rather than powders[14]Not documented
Gluing & solvent weldingCyanoacrylate; no common solvent welds polyamide[14]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[14]Not documented
Solvents & Solubility
Soluble inFormic acid, phenol, m-cresol and hexafluoroisopropanol dissolve the matrix at 23 °C, leaving the fibre; laboratory reagents.[27]Chlorinated hydrocarbons — dichloromethane and chloroform — are solvents for polyetherimide. Laboratory reagents.[28][29]
Softened or crazed byZinc chloride solutions stress-crack the nylon matrix, alcoholic calcium chloride dissolves it, mineral acids attack it.[27]Acetone, MEK, benzene, toluene and butyl acetate craze or stress-crack it; alcohols, fuels and dilute acids do not.[29][28]
Solvent welding & smoothing agentNone — nylon's only solvents (formic acid, phenol, HFIP) degrade the part, and the fibre blocks surface flow anyway.[27]Dichloromethane is the only welding route, and it is a controlled carcinogen rather than a workshop material.[28][29]

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. Fiberon PA6-GF25 Technical Data Sheet V1.1 Polymaker · 2024-12 · tds
  2. Bambu Filament Technical Data Sheet — PA6-GF Bambu Lab · 2026-08 · tds
  3. ThermaX PEI 1010 Technical Data Sheet v4 3DXTech · 2026-08 · tds
  4. Prusament PEI 1010 Technical Datasheet v1.0 Prusa Polymers · 2024-09 · tds
  5. ULTEM 1010 Resin — FDM Material Data Sheet Stratasys · 2026-06 · tds
  6. Polymaker product catalogue Polymaker · 2026-08 · vendor
  7. SUNLU Nylon-6 Glass Fiber (PA6-GF) 3D Printer Filament 1 kg — product page SUNLU · 2026-08 · vendor
  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. YXPOLYER PA6-GF Black 1 kg — product page YXPOLYER · 2026-08 · vendor
  14. Nylon — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  15. PA (Nylon) — material basics Polymaker Wiki · 2026-08 · doc
  16. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  17. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  18. Prusament PEI 1010 — material page Prusa Polymers · 2026-08 · doc
  19. THERMAX PEI 1010 — product page (print recommendations) 3DXTech · 2026-08 · doc
  20. Moisture Conditioning — effect on printed nylon properties Polymaker Wiki · 2026-08 · doc
  21. Fiberon PA6-CF20 Technical Data Sheet V1.1 Polymaker · 2024-12 · tds
  22. PolyMide CoPA Technical Data Sheet V5.4 (dry and wet status blocks) Polymaker · 2024-11 · tds
  23. FDM PA6/66-GF30-FR — Material Data Sheet Stratasys · 2026-07 · tds
  24. TECAMID 66 GF30 black (PA66-GF30) — stock shape properties Ensinger · 2026-08 · tds
  25. TECAPEI natural (PEI) — stock shape properties Ensinger · 2026-08 · tds
  26. 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
  27. Ultramid Nylon Chemical Resistance guide (unmodified PA6 B27E and PA66 A27E) BASF · 2026-08 · tds
  28. Radel PPSU, Veradel PESU, Acudel modified PPSU Design Guide — environmental stress cracking tables Solvay Specialty Polymers · 2026-08 · tds
  29. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds