3D Printing Info

Filament comparison

PETG-GF vs PLA HS

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

Glass-fibre polyester (PETG-GF / PET-GF) guideHigh-Speed PLA guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PETG-GF comparisonsMore PLA HS comparisons
PETG-GF vs PLA HS — documented properties and sources
PropertyGlass-fibre polyester (PETG-GF / PET-GF)PETGHigh-Speed PLAPLA
Market snapshot
Listing priceUSD/kg; dated snapshots$27.38/kg median; $18.99–$29.99/kg across 3 dated product listings$19.99/kg median; $11.49–$32.99/kg across 10 dated product listings
Identity & Market
Base polymer / chemistryGlass-fibre reinforced polyester. Polymaker's Fiberon PET-GF15 uses a PET rather than a PETG matrix and carries 15 wt% glass fibre[1]PLA with rheology and crystallisation tuned for high volumetric flow; melt index 15.4 g/10 min vs 7–11 for standard PLA[2][3]
Densityg/cm³1.43 (Fiberon PET-GF15, ISO 1183)[1]1.23 (ISO 1183, at 21.5 °C)[2]
Typical priceUSD/kg1 kg spools cluster near 25[4][5]Mainstream 1 kg spools cluster near 20[6][7][8]
Price range across brandsUSD/kg19–30 across brands; ELEGOO 19, Polymaker Fiberon 30[4][5]11–33 across brands; budget house brands 11–18, Prusament 33[9][10][11]
Market availability1–5Niche, a handful of specialist brands[4][5]Stocked by most mainstream brands[12][8][13]
Spool sizes & diameters1.75 mm; 0.5 and 1 kg spools[5]1.75 mm; 1 kg spools[6][8]
Typical applicationsStiff, dimensionally stable fixtures; the Fiberon grade is designed to be annealed for heat resistance[1]Large or repetitive prints on printers that can sustain high flow[14][12]
Diameter tolerance± mmNot documented±0.03 (Bambu Lab PLA Basic, rated to 258 mm/s)[15]
Printing Parameters
Nozzle temperature°CNot documented210–230 for high-speed work; 190–210 at classic speeds[2][12]
Bed temperature°CNot documented30–60 (Polymaker); 35–45 (Bambu Lab)[2][16]
Enclosure / chamber requirement1–5Not documentedOpen frame is fine[2]
Part cooling fanNot documentedFan on[2]
Bed surface & adhesion aidTextured PEI, satin or powder-coated sheets; on smooth PEI a glue stick acts as a release agent[17][18]Not documented
Maximum volumetric flow (mm³/s; see test conditions)mm³/sNot documented≈24 at 300 mm/s with a 0.4 mm nozzle and 0.2 mm layer; 30 % more flow than regular PLA at the same temperature[2][12][14][19]
Warping tendency1–5Not documentedNone[2]
Bed-adhesion difficulty1–5Needs the right surface or a thin adhesive — the problem is releasing the part, not sticking it[17][18]Sticks to anything[20]
Stringing / oozing tendency1–5Moderate — retraction tuning needed; Polymaker names stringing as PETG's common quirk[18]Not documented
Overall printing difficulty1–5Not documentedEasy — minor profile tuning; needs a printer that can actually reach the flow rate[12][2]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required[1]Brass fine indefinitely[21]
Abrasiveness1–5Highly abrasive — standard GF composite[1]Non-abrasive[22][21]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[23]Very low[21]
Heat-creep / jam sensitivity1–5Slightly sensitive[24]Moderate — good heatbreak cooling needed; PLA softens below 60 °C[25]
Hotend requirementNo special hot-end required[24]No special hot-end required[20]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate (0.3–0.8 %) — the PETG matrix reaches 0.40 % saturated at 25 °C / 55 % RH; no glass-filled grade publishes its own figure[17]Moderate — 0.40 % equilibrium at 23 °C / 70 % RH[2]
Equilibrium moisture content at ~50 % RH%Not documented0.40 equilibrium at 23 °C / 70 % RH (Polymaker PolySonic)[2]
Drying temperature & timeNot documented55 °C for 6 h; 50 °C for 8 h (Bambu Lab)[2][16]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[26]Bubbling and popping at the nozzle, stringing, rough surface and weak layers[26]
Effect of moisture on strengthPolymaker groups PETG with nylon, PVA and TPU as highly hygroscopic; no dry-versus-conditioned strength figures are published for this grade and the loss shows as bubbling and poor layer adhesion[26]Polymaker rates PLA low-sensitivity — the loss shows as poor layer adhesion and brittle layers rather than a published strength figure[26]
Storage requirementSealed with desiccant; Polymaker groups PETG with the highly hygroscopic materials[26][18]Sealed with desiccant below 20 % RH; shelf life at ambient is long[16][20]
Mechanical Properties
Tensile strength (XY)MPa59.9 ± 0.8 printed XY, ISO 527 (Fiberon PET-GF15)[1]43.9 at 300 mm/s and 46.0 at 46.7 mm/s (printed XY, ISO 527); 58.6 on My Tech Fun bars for Creality Hyper PLA[2][27]
Young's modulusMPa4144 ± 133 printed XY, ISO 527 (Fiberon PET-GF15)[1]2650 at 300 mm/s, 2878 at classic speed (printed XY, ISO 527)[2]
Elongation at break%4.0 ± 0.5 printed XY, ISO 527 (Fiberon PET-GF15)[1]15.1 at 300 mm/s, 21.5 at classic speed (printed XY, ISO 527)[2]
Flexural strengthMPa104.2 ± 2.4 printed XY, ISO 178 (Fiberon PET-GF15)[1]71.4 at 300 mm/s, 76.5 at classic speed (printed XY, ISO 178)[2]
Flexural modulusMPa3705 ± 85 printed XY, ISO 178 (Fiberon PET-GF15)[1]2798 at 300 mm/s, 2868 at classic speed (printed XY, ISO 178)[2]
Charpy impact, notchedkJ/m²8.7 ± 0.6 printed XY, ISO 179, notched (Fiberon PET-GF15)[1]5.0 at 300 mm/s, 6.1 at classic speed (printed XY, ISO 179, notched)[2]
Other impact dataCharpy unnotched 27.2 ± 2.0 printed XY (Fiberon PET-GF15, ISO 179)[1]Printing at 300 mm/s instead of 46.7 mm/s costs 4.6 % tensile strength and 18 % notched Charpy[2]
Layer adhesion / Z tensileMPa48.2 ± 0.3 printed Z, ISO 527 (Fiberon PET-GF15)[1]32.4 at 300 mm/s, 37.3 at classic speed (printed Z, ISO 527); 35.3 for Creality Hyper PLA vs 23.0 for average PLA on identical bars[2][27]
Brittleness1–5Brittle — snaps with little warning; elongation 4.0 % in XY and 2.6 % in Z[1]Moderate[2]
Hardness (scale-specific)Shore A / Shore D / RockwellNot documented78.7 Shore D measured on printed bars for Sunlu PLA Meta (My Tech Fun), against 75.3 for the same maker's plain PLA[28]
Creep resistance / sustained load1–5Below average — no GF-grade creep test; the CF grades sagged to 14.8–16.7 mm over 5 days at 1.25 kg against 17.1–20.4 mm unfilled[29][30][31]Poor — 12 mm bar sagged to 17.7 mm over 6 days at 1.25 kg[27]
Fatigue / repeated-flex resistance1–5Below average — no GF-grade S-N curve; elongation at break falls to 4.0 % in XY against 5.2–9.3 % unfilled[1][32]Poor — no grade-specific S-N curve; plain printed PLA ran 38 000–49 000 cycles at 30 % of tensile strength (R = 0.2)[32][25]
Elasticity / flexibility1–5Rigid[1]Rigid[2]
Z strength as % of XY%80 (Fiberon PET-GF15, printed Z against XY tensile)[1]74 at 300 mm/s, 81 at classic speed (printed)[2]
Thermal Properties
HDT at 0.45 MPa°C81.6 as printed, 133.7 after annealing (ISO 75, 0.45 MPa)[1]53 (ISO 75, 0.45 MPa)[2]
HDT at 1.8 MPa°C71.8 as printed, 87.3 after annealing (ISO 75, 1.8 MPa)[1]52 (ISO 75, 1.8 MPa)[2]
Glass transition (Tg)°C59.5 (DSC)[1]59 (DSC)[2]
Melting point / Vicat°C231.6 melting (DSC); Vicat 232.6 (ISO 306)[1]164 peak melt (DSC); crystallisation 96 °C, Vicat 61 °C[2]
Continuous service temperature°CNot documented53 — loaded bars begin to move at this temperature[27]
Annealing responseAnnealing lifts HDT at 0.45 MPa from 81.6 to 133.7 °C[1]Not documented
Thermal expansion (CTE)µm/m·K20 along the print bead and 63–74 in the build direction at 30 °C (30 wt% GF, large-format printed, TMA)[33]96–99 for plain printed PLA (fibre Bragg grating, 25–50 °C); no grade-specific measurement published[34]
Flammability / UL 94UL 94 HB at 1.5 mm (Fiberon PET-GF15)[1]Flammable; no UL 94 rating published by the major brands[16][3]
Environment & Chemical
UV resistance1–5Not documentedDegrades within weeks outdoors[25][35]
Chemical resistanceWithstands acids, alkalis, oils and UV exposure[18]Good against weak acids, oils and grease; poor against strong acids and alkalis[2]
Water / humidity resistance in service1–5Not documentedGood — insoluble in water[16]
Food contactNot certified for food contact as filament[18]Base resin is food-contact grade, but printed layer grooves harbour bacteria; Prusa advises against food use[25]
Biodegradability / compostabilityNot biodegradable[18]Industrially compostable only — needs sustained 55 °C; not home compostable[36][25]
RecyclabilityNot accepted in household plastic collection[18]Mechanically recyclable; not accepted in household plastic collection[36]
Electrical & ESD propertiesSurface resistivity above 10¹² ohm — insulating (Fiberon PET-GF15, ANSI/ESD S11.11)[1]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[37]Low hazard — minimal VOC and particle emission[37]
Ventilation / filtration requirement1–5Open a window / occasional ventilation[37]None needed in a normal room[37]
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[1]Not documented
Post-Processing
Sanding & machiningSands poorly — the material is tough and gums rather than powders[24]Wet sanding — dry sanding heats the surface by friction and smears it[35][25]
Gluing & solvent weldingCyanoacrylate; no common solvent welds PETG cleanly[24]Cyanoacrylate for most joints; some grades partially dissolve and bond with acetone[25][38]
Vapour / chemical smoothingNo practical vapour smoothing[24]No practical vapour smoothing — only chloroform, hot benzene or THF, which are laboratory-only[25]
Support material pairingPrints its own supports; Polymaker rates PolyDissolve S1 for PETG[24]PolySupport and PolyDissolve S1 (Polymaker)[2]
Solvents & Solubility
Soluble inNo common workshop solvent; dichloromethane — a carcinogen — dissolves the matrix surface, 1,2-dichloroethane destroys it in a week.[39][40]Chloroform: 10 % w/v in 2–4 h at 23 °C, every grade and morphology; THF and DMF only at 65 °C. Laboratory reagents.[41]
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, ethyl acetate and toluene plasticise it but dissolve <1 % even at 65 °C; submersion in acetone crazes and destroys parts.[41][40]
Solvent welding & smoothing agentDichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[40]Chloroform vapour smooths and welds PLA at the cost of tensile strength; acetone does not smooth it at all.[42][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. Fiberon PET-GF15 Technical Data Sheet V1.0 Polymaker · 2026-08 · tds
  2. PolySonic PLA Technical Data Sheet V5.4 Polymaker · 2024-11 · tds
  3. PolyLite PLA Technical Data Sheet V5.4 Polymaker · 2024-11 · tds
  4. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  5. Polymaker product catalogue Polymaker · 2026-08 · vendor
  6. PolySonic PLA 1.75mm/1kg — product page Polymaker Shop · 2026-08 · vendor
  7. Overture High Speed PLA 1.75mm Overture3D · 2026-08 · vendor
  8. High Speed PLA filament collection Anycubic Official Store · 2026-08 · vendor
  9. PLA Meta filament collection Sunlu Official Store · 2026-08 · vendor
  10. QIDI PLA Rapido 1.75mm 1kg 3D Printers Depot · 2026-08 · vendor
  11. Prusament PLA Prusa Pro Green 1kg (NFC) Prusa Research · 2026-08 · vendor
  12. PolySonic PLA — product page Polymaker · 2026-08 · vendor
  13. Creality PLA filament collection Creality Official Store · 2026-08 · vendor
  14. Polymaker Launches New High-Speed 3D Printing Filament — PolySonic PLA & PLA Pro Polymaker · 2023-11 · doc
  15. PLA Basic — product page Bambu Lab US Store · 2026-08 · vendor
  16. Bambu Filament Technical Data Sheet V3.0 — PLA Basic Bambu Lab · 2026-08 · tds
  17. Prusament PETG Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  18. PETG — material basics Polymaker Wiki · 2026-08 · doc
  19. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  20. PLA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  21. Filament Material Guide Prusa Knowledge Base · 2026-08 · doc
  22. Prusament PLA — material page Prusa Polymers · 2026-08 · doc
  23. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  24. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  25. PLA — material guide Prusa Knowledge Base · 2026-08 · doc
  26. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  27. Creality Hyper PLA filament review — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  28. Carbon Fiber PLA vs META-PLA vs PLA+ vs PLA by Sunlu — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  29. Extrudr PETG vs PCTG vs XPETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  30. Prusament PETG-CF vs PETG V0 vs PETG — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  31. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  32. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  33. 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
  34. Characterization of Thermal Expansion Coefficient of 3D Printing Polymeric Materials Using Fiber Bragg Grating Sensors Materials 17(18):4668 · 2024-09 · paper
  35. Prusament PLA Technical Data Sheet v1.0 Prusa Polymers · 2018-09 · tds
  36. Filamentive PLA (recycled) — product page Filamentive · 2026-08 · vendor
  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. Prusament rPLA Corn Pigment 1kg — product page Prusa Research · 2026-08 · vendor
  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
  41. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  42. Effect of vapour smoothing in trichloromethane on 3D printed PLA — surface, mechanical and chemical structure Pitale, Keche & Chopra, Engineering Research Express 6(4) 045579 · 2024-12 · paper