3D Printing Info

Filament comparison

PETG-GF vs PPS

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

Glass-fibre polyester (PETG-GF / PET-GF) guidePPS guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PETG-GF comparisonsMore PPS comparisons
PETG-GF vs PPS — documented properties and sources
PropertyGlass-fibre polyester (PETG-GF / PET-GF)PETGPPSHIGHTEMP
Market snapshot
Listing priceUSD/kg; dated snapshots$27.38/kg median; $18.99–$29.99/kg across 3 dated product listings$116.97/kg median; $84.00–$200.00/kg across 3 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]Polyphenylene sulfide — a semi-crystalline high-temperature polymer[2][3]
Densityg/cm³1.43 (Fiberon PET-GF15, ISO 1183)[1]1.28 (ISO 1183, 3DXTech) and 1.33 (ISO 1183, Spectrum PPS AM230)[2][4]
Typical priceUSD/kg1 kg spools cluster near 25[5][6]1 kg-equivalent spools span 84–200; the middle of the market is about 117[7][8][9]
Price range across brandsUSD/kg19–30 across brands; ELEGOO 19, Polymaker Fiberon 30[5][6]84-200 across brands and diameters; IEMAI 3D 84 at 1 kg, Spectrum PPS AM230 117 at 750 g, 3DXTech ThermaX PPS 140 at 2.85 mm and 200 at 1.75 mm[7][8][9]
Market availability1–5Niche, a handful of specialist brands[5][6]Niche, a handful of specialist brands[7][8]
Spool sizes & diameters1.75 mm; 0.5 and 1 kg spools[6]1.75 and 2.85 mm; 500 g and 750 g spools[7][8]
Typical applicationsStiff, dimensionally stable fixtures; the Fiberon grade is designed to be annealed for heat resistance[1]Chemical-plant and under-bonnet parts needing solvent resistance above 200 °C[3]
Printing Parameters
Nozzle temperature°CNot documented335-345 (3DXTech printed-specimen conditions); 300-330 (Spectrum)[2][4]
Bed temperature°CNot documented110-130 (3DXTech); 100-120 (Spectrum)[2][4]
Enclosure / chamber requirement1–5Not documentedActively heated chamber required[10][11]
Recommended chamber temperature°CNot documented60-80 actively heated (Spectrum PPS AM230)[4]
Bed surface & adhesion aidTextured PEI, satin or powder-coated sheets; on smooth PEI a glue stick acts as a release agent[12][13]Adhesive required — Spectrum specifies Magigoo Pro HT[4]
Bed-adhesion difficulty1–5Needs the right surface or a thin adhesive — the problem is releasing the part, not sticking it[12][13]Not documented
Stringing / oozing tendency1–5Moderate — retraction tuning needed; Polymaker names stringing as PETG's common quirk[13]Not documented
Overall printing difficulty1–5Not documentedExpert / industrial hardware only[10][11]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required[1]Brass fine indefinitely for unfilled grades, but brass softens near these nozzle temperatures — hardened or plated hot ends are the norm[10]
Abrasiveness1–5Highly abrasive — standard GF composite[1]Non-abrasive when unfilled[2]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[14]Moderate — needs dry filament and a clean nozzle; 3DXTech lists no special nozzle concerns but a mandatory 110 °C pre-dry before every print[15]
Heat-creep / jam sensitivity1–5Slightly sensitive[16]Not documented
Hotend requirementNo special hot-end required[16]Not documented
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[12]Negligible (<0.1 % EMC) — Polymaker states minimal water absorption at 0.05 %[3]
Equilibrium moisture content at ~50 % RH%Not documented0.01 in 24 h on extruded stock (ASTM D570) — effectively non-absorbing[17]
Drying temperature & timeNot documentedAt least 3 h at 90 °C in hot dry air if the filament has taken up moisture (Spectrum)[4]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[18]Not documented
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[18]Little to measure — equilibrium uptake is 0.05 %; 3DXTech still specifies a 110 °C, 4 h pre-dry before printing[3][15]
Storage requirementSealed with desiccant; Polymaker groups PETG with the highly hygroscopic materials[18][13]Not documented
Mechanical Properties
Tensile strength (XY)MPa59.9 ± 0.8 printed XY, ISO 527 (Fiberon PET-GF15)[1]50 at break (printed XY, ISO 527, 3DXTech); 65 at break injection-moulded (ISO 527, Spectrum); 94 at yield on extruded stock (ASTM D638)[2][4][17]
Young's modulusMPa4144 ± 133 printed XY, ISO 527 (Fiberon PET-GF15)[1]2650 (printed XY, ISO 527, 3DXTech); 3650 injection-moulded (ISO 527, Spectrum); 5769 on extruded stock (ASTM D638)[2][4][17]
Elongation at break%4.0 ± 0.5 printed XY, ISO 527 (Fiberon PET-GF15)[1]18 at break (printed XY, ISO 527, 3DXTech) against 2.0 injection-moulded (Spectrum) and 2.5 on extruded stock — the suppliers disagree by nearly an order of magnitude[2][4][17]
Flexural strengthMPa104.2 ± 2.4 printed XY, ISO 178 (Fiberon PET-GF15)[1]52 (printed XY, ISO 178, 3DXTech); 141 on extruded stock (ASTM D790)[2][17]
Flexural modulusMPa3705 ± 85 printed XY, ISO 178 (Fiberon PET-GF15)[1]2540 (printed XY, ISO 178)[2]
Charpy impact, notchedkJ/m²8.7 ± 0.6 printed XY, ISO 179, notched (Fiberon PET-GF15)[1]1.3 notched injection-moulded (ISO 179-1eA, Spectrum); unnotched 18[4]
Other impact dataCharpy unnotched 27.2 ± 2.0 printed XY (Fiberon PET-GF15, ISO 179)[1]Izod notched 33 J/m on extruded PPS stock, converted from 0.62 ft-lb/in (ASTM D256)[17]
Layer adhesion / Z tensileMPa48.2 ± 0.3 printed Z, ISO 527 (Fiberon PET-GF15)[1]Not documented
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 documentedRockwell 105 (and R124) on extruded PPS stock (ASTM D785)[17]
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[19][20][21]Excellent — holds load for years. Ensinger lists high creep resistance as a headline property of extruded PPS stock, and Spectrum states that rigidity, strength and creep resistance are unchanged under continuous load at high temperature[17][4]
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][22]Not documented
Elasticity / flexibility1–5Rigid[1]Rigid[2]
Z strength as % of XY%80 (Fiberon PET-GF15, printed Z against XY tensile)[1]Not documented
Thermal Properties
HDT at 0.45 MPa°C81.6 as printed, 133.7 after annealing (ISO 75, 0.45 MPa)[1]90 (printed XY, ISO 75 at 0.45 MPa, 3DXTech); 129 injection-moulded (ISO 75, Spectrum); 204 on extruded stock (ASTM D648 at 66 psi)[2][4][17]
HDT at 1.8 MPa°C71.8 as printed, 87.3 after annealing (ISO 75, 1.8 MPa)[1]107 injection-moulded (ISO 75 at 1.81 MPa, Spectrum); 104 on extruded stock (ASTM D648 at 264 psi)[4][17]
Glass transition (Tg)°C59.5 (DSC)[1]Not documented
Melting point / Vicat°C231.6 melting (DSC); Vicat 232.6 (ISO 306)[1]283 melting (ISO 11357, 3DXTech) and 280 on extruded stock; Vicat softening 236 at 50 N injection-moulded (ISO 306, Spectrum)[2][4][17]
Continuous service temperature°CNot documented170 long-term service on extruded PPS stock, converted from 338 °F[17]
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)[23]59.4 (extruded PPS stock, 22-60 °C, ASTM D696; source states 3.3e-5 in/in/°F)[17]
Flammability / UL 94UL 94 HB at 1.5 mm (Fiberon PET-GF15)[1]UL 94 V-0 at 1.5 mm, rated on the base resin[2]
Environment & Chemical
Chemical resistanceWithstands acids, alkalis, oils and UV exposure[13]Outstanding — PPS resists essentially all solvents below 200 °C[3]
Water / humidity resistance in service1–5Not documentedExcellent — essentially unaffected; extruded stock takes up 0.01 % water in 24 h[17]
Food contactNot certified for food contact as filament[13]Not documented
Biodegradability / compostabilityNot biodegradable[13]Not documented
RecyclabilityNot accepted in household plastic collection[13]Not documented
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[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]
Ventilation / filtration requirement1–5Open a window / occasional ventilation[24]Ventilated room or enclosure recommended[24]
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[16]Not documented
Gluing & solvent weldingCyanoacrylate; no common solvent welds PETG cleanly[16]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[16]Not documented
Support material pairingPrints its own supports; Polymaker rates PolyDissolve S1 for PETG[16]Not documented
Solvents & Solubility
Soluble inNo common workshop solvent; dichloromethane — a carcinogen — dissolves the matrix surface, 1,2-dichloroethane destroys it in a week.[25][26]None — PPS does not dissolve in any known solvent below 200 °C.[27][28]
Softened or crazed byAcetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[25]Nothing at 23 °C; Ensinger rates it only conditionally resistant to benzene, dichloromethane, toluene and pyridine.[28]
Solvent welding & smoothing agentDichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[26]None — no solvent welds or smooths PPS.[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. Fiberon PET-GF15 Technical Data Sheet V1.0 Polymaker · 2026-08 · tds
  2. ThermaX PPS Technical Data Sheet v3 3DXTech · 2026-08 · tds
  3. PPS — material basics Polymaker Wiki · 2026-08 · doc
  4. Spectrum PPS AM230 Technical Data Sheet Spectrum Filaments · 2022-04 · tds
  5. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  6. Polymaker product catalogue Polymaker · 2026-08 · vendor
  7. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  8. Spectrum PPS AM230 Natural, 1.75 mm / 750 g 3DJAKE · 2026-08 · vendor
  9. IEMAI 3D PPS 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  10. Prusament PEI 1010 Technical Datasheet v1.0 Prusa Polymers · 2024-09 · tds
  11. Prusament PEI 1010 — material page Prusa Polymers · 2026-08 · doc
  12. Prusament PETG Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  13. PETG — material basics Polymaker Wiki · 2026-08 · doc
  14. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  15. THERMAX PPS — product page (print recommendations) 3DXTech · 2026-08 · doc
  16. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  17. TECATRON natural (PPS) — stock shape properties Ensinger · 2026-08 · tds
  18. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  19. Extrudr PETG vs PCTG vs XPETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  20. Prusament PETG-CF vs PETG V0 vs PETG — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  21. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  22. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  23. 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
  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. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  26. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  27. PPS (Polyphenylene sulfide) — Knowledge Base Prusa Research · 2026-08 · doc
  28. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds