3D Printing InfoFilament comparison
PEBA vs PETG-GF
Compare printing settings, strength, heat resistance, dated prices and sources.
2 selected · all documented properties
| Property | PEBA (polyether block amide)FLEX | Glass-fibre polyester (PETG-GF / PET-GF)PETG |
|---|---|---|
| Market snapshot | ||
| Listing priceUSD/kg; dated snapshots | $60.99/kg median; $60.99–$60.99/kg across 1 dated product listings | $27.38/kg median; $18.99–$29.99/kg across 3 dated product listings |
| Identity & Market | ||
| Base polymer / chemistry | Polyether block amide: rigid polyamide and flexible polyether blocks.[1] | Glass-fibre reinforced polyester. Polymaker's Fiberon PET-GF15 uses a PET rather than a PETG matrix and carries 15 wt% glass fibre[2] |
| Densityg/cm³ | 1.01 g/cm³ (GB/T 1033; eSUN manufacturer data)[1] | 1.43 (Fiberon PET-GF15, ISO 1183)[2] |
| Typical priceUSD/kg | Not documented | 1 kg spools cluster near 25[3][4] |
| Price range across brandsUSD/kg | Not documented | 19–30 across brands; ELEGOO 19, Polymaker Fiberon 30[3][4] |
| Market availability1–5 | Not documented | Niche, a handful of specialist brands[3][4] |
| Spool sizes & diameters | 1.75 mm diameter, 1 kg spool.[5] | 1.75 mm; 0.5 and 1 kg spools[4] |
| Typical applications | Manufacturer applications include footwear, sports equipment and cushioning.[1] | Stiff, dimensionally stable fixtures; the Fiberon grade is designed to be annealed for heat resistance[2] |
| Printing Parameters | ||
| Nozzle temperature°C | 230–260 °C; 240 °C recommended.[1] | Not documented |
| Bed temperature°C | 60–90 °C[1] | Not documented |
| Part cooling fan | 10–50% fan recommended; mechanical-test specimens used 50–100%.[1] | Not documented |
| Bed surface & adhesion aid | PEI build plate[1] | Textured PEI, satin or powder-coated sheets; on smooth PEI a glue stick acts as a release agent[6][7] |
| Maximum volumetric flow (mm³/s; see test conditions)mm³/s | 9 mm³/s maximum in eSUN spiral-vase test; mechanical specimens used 2 mm³/s. Linear recommendation 25–110 mm/s is a separate quantity.[1] | Not documented |
| Bed-adhesion difficulty1–5 | Not documented | Needs the right surface or a thin adhesive — the problem is releasing the part, not sticking it[6][7] |
| Stringing / oozing tendency1–5 | Not documented | Moderate — retraction tuning needed; Polymaker names stringing as PETG's common quirk[7] |
| Hardware Wear & Reliability | ||
| Nozzle hardness required1–4 | Not documented | Hardened steel required[2] |
| Abrasiveness1–5 | Not documented | Highly abrasive — standard GF composite[2] |
| Nozzle clog risk1–5 | Not documented | Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[8] |
| Heat-creep / jam sensitivity1–5 | Not documented | Slightly sensitive[9] |
| Hotend requirement | Not documented | No special hot-end required[9] |
| Moisture Behaviour | ||
| Moisture absorption (hygroscopicity)1–5 | Not documented | Moderate (0.3–0.8 %) — the PETG matrix reaches 0.40 % saturated at 25 °C / 55 % RH; no glass-filled grade publishes its own figure[6] |
| Drying temperature & time | 70–75 °C for 6–8 h; re-dry after receiving or extended exposure.[1] | Not documented |
| Symptoms when wet | Not documented | Bubbling and popping at the nozzle, stringing and a rough surface[10] |
| Effect of moisture on strength | Not documented | Polymaker 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[10] |
| Storage requirement | Not documented | Sealed with desiccant; Polymaker groups PETG with the highly hygroscopic materials[10][7] |
| Mechanical Properties | ||
| Tensile strength (XY)MPa | >16.5 MPa printed XY, GB/T 1040; manufacturer lower bound, not an exact measurement.[1] | 59.9 ± 0.8 printed XY, ISO 527 (Fiberon PET-GF15)[2] |
| Young's modulusMPa | Not documented | 4144 ± 133 printed XY, ISO 527 (Fiberon PET-GF15)[2] |
| Elongation at break% | >520% printed XY, GB/T 1040; manufacturer lower bound.[1] | 4.0 ± 0.5 printed XY, ISO 527 (Fiberon PET-GF15)[2] |
| Flexural strengthMPa | Not documented | 104.2 ± 2.4 printed XY, ISO 178 (Fiberon PET-GF15)[2] |
| Flexural modulusMPa | Not documented | 3705 ± 85 printed XY, ISO 178 (Fiberon PET-GF15)[2] |
| Charpy impact, notchedkJ/m² | Not documented | 8.7 ± 0.6 printed XY, ISO 179, notched (Fiberon PET-GF15)[2] |
| Other impact data | Not documented | Charpy unnotched 27.2 ± 2.0 printed XY (Fiberon PET-GF15, ISO 179)[2] |
| Layer adhesion / Z tensileMPa | 7.5 MPa printed Z, GB/T 1040 (manufacturer test)[1] | 48.2 ± 0.3 printed Z, ISO 527 (Fiberon PET-GF15)[2] |
| Brittleness1–5 | Not documented | Brittle — snaps with little warning; elongation 4.0 % in XY and 2.6 % in Z[2] |
| Hardness (scale-specific)Shore A / Shore D / Rockwell | 90 Shore A nominal grade designation; do not compare numerically with Shore D or Rockwell.[5] | Not documented |
| Creep resistance / sustained load1–5 | Not documented | Below 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[11][12][13] |
| Fatigue / repeated-flex resistance1–5 | Not documented | Below average — no GF-grade S-N curve; elongation at break falls to 4.0 % in XY against 5.2–9.3 % unfilled[2][14] |
| Elasticity / flexibility1–5 | Not documented | Rigid[2] |
| Z strength as % of XY% | Not documented | 80 (Fiberon PET-GF15, printed Z against XY tensile)[2] |
| Thermal Properties | ||
| HDT at 0.45 MPa°C | Not documented | 81.6 as printed, 133.7 after annealing (ISO 75, 0.45 MPa)[2] |
| HDT at 1.8 MPa°C | Not documented | 71.8 as printed, 87.3 after annealing (ISO 75, 1.8 MPa)[2] |
| Glass transition (Tg)°C | Not documented | 59.5 (DSC)[2] |
| Melting point / Vicat°C | 110 °C Vicat softening (GB/T 1633, 120 °C/h, 10 N); not HDT or a continuous-use rating.[1] | 231.6 melting (DSC); Vicat 232.6 (ISO 306)[2] |
| Annealing response | Not documented | Annealing lifts HDT at 0.45 MPa from 81.6 to 133.7 °C[2] |
| Thermal expansion (CTE)µm/m·K | Not documented | 20 along the print bead and 63–74 in the build direction at 30 °C (30 wt% GF, large-format printed, TMA)[15] |
| Flammability / UL 94 | Not documented | UL 94 HB at 1.5 mm (Fiberon PET-GF15)[2] |
| Environment & Chemical | ||
| Chemical resistance | Not documented | Withstands acids, alkalis, oils and UV exposure[7] |
| Food contact | Not documented | Not certified for food contact as filament[7] |
| Biodegradability / compostability | Not documented | Not biodegradable[7] |
| Recyclability | Not documented | Not accepted in household plastic collection[7] |
| Electrical & ESD properties | Not documented | Surface resistivity above 10¹² ohm — insulating (Fiberon PET-GF15, ANSI/ESD S11.11)[2] |
| Health & Safety | ||
| Fume toxicity1–5 | Not documented | Moderate — measurable VOCs and UFPs, ventilation advised[16] |
| Ventilation / filtration requirement1–5 | Not documented | Open a window / occasional ventilation[16] |
| Dust & fibre handling hazard | Not documented | Glass fibre is bound in the matrix; avoid inhaling sanding dust[2] |
| Post-Processing | ||
| Sanding & machining | Not documented | Sands poorly — the material is tough and gums rather than powders[9] |
| Gluing & solvent welding | Not documented | Cyanoacrylate; no common solvent welds PETG cleanly[9] |
| Vapour / chemical smoothing | Not documented | No practical vapour smoothing[9] |
| Support material pairing | Not documented | Prints its own supports; Polymaker rates PolyDissolve S1 for PETG[9] |
| Solvents & Solubility | ||
| Soluble in | Not documented | No common workshop solvent; dichloromethane — a carcinogen — dissolves the matrix surface, 1,2-dichloroethane destroys it in a week.[17][18] |
| Softened or crazed by | Not documented | Acetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[17] |
| Solvent welding & smoothing agent | Not documented | Dichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[18] |
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
- eSUN PEBA-90A Technical Data Sheet v1.0 (Aug 2025), checked 2026-10-17 eSUN · 2025-08 · tds
- Fiberon PET-GF15 Technical Data Sheet V1.0 Polymaker · 2026-08 · tds
- ELEGOO product catalogue ELEGOO · 2026-08 · vendor
- Polymaker product catalogue Polymaker · 2026-08 · vendor
- eSUN PEBA-90A official product page: 1 kg price and product identity eSUN · 2026-10-17 · vendor
- Prusament PETG Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
- PETG — material basics Polymaker Wiki · 2026-08 · doc
- Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
- PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
- Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
- Extrudr PETG vs PCTG vs XPETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
- Prusament PETG-CF vs PETG V0 vs PETG — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
- BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
- Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
- 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
- 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
- Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
- Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc