3D Printing Info

Filament comparison

PETG-GF vs POM

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

Glass-fibre polyester (PETG-GF / PET-GF) guidePOM (acetal) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PETG-GF comparisonsMore POM comparisons
PETG-GF vs POM — documented properties and sources
PropertyGlass-fibre polyester (PETG-GF / PET-GF)PETGPOM (acetal)ENGINEERING
Market snapshot
Listing priceUSD/kg; dated snapshots$27.38/kg median; $18.99–$29.99/kg across 3 dated product listingsNot documented
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]Polyoxymethylene, normally the copolymer POM-C. Apium's filament grade is POM-C with antistatic additives; no unfilled POM filament was found on sale[2][3]
Densityg/cm³1.43 (Fiberon PET-GF15, ISO 1183)[1]1.41 (extruded POM-C stock)[2]
Typical priceUSD/kg1 kg spools cluster near 25[4][5]Not documented
Price range across brandsUSD/kg19–30 across brands; ELEGOO 19, Polymaker Fiberon 30[4][5]Not documented
Market availability1–5Niche, a handful of specialist brands[4][5]Special order, 1-2 makers worldwide — Apium sells a POM-C ESD filament through its own shop and states its printers are the only ones able to process POM-C; no POM filament appears in the 3DJAKE or igo3d product sitemaps, at MatterHackers or at Printed Solid[3][6][7][8]
Spool sizes & diameters1.75 mm; 0.5 and 1 kg spools[5]Not documented
Typical applicationsStiff, dimensionally stable fixtures; the Fiberon grade is designed to be annealed for heat resistance[1]Gears, bushings, bearings, conveyor and food-machinery parts; Apium markets its POM-C ESD grade for semiconductor insulators, aerospace fasteners and sliding parts[2][3]
Printing Parameters
Bed surface & adhesion aidTextured PEI, satin or powder-coated sheets; on smooth PEI a glue stick acts as a release agent[9][10]Not documented
Bed-adhesion difficulty1–5Needs the right surface or a thin adhesive — the problem is releasing the part, not sticking it[9][10]Not documented
Stringing / oozing tendency1–5Moderate — retraction tuning needed; Polymaker names stringing as PETG's common quirk[10]Not documented
Extruder requirementNot documentedApium states that the adaptive heating system on its industrial machines is what makes POM-C printable, and that no other 3D printer can process it[3]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required[1]Not documented
Abrasiveness1–5Highly abrasive — standard GF composite[1]Not documented
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[11]Not documented
Heat-creep / jam sensitivity1–5Slightly sensitive[12]Not documented
Hotend requirementNo special hot-end required[12]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[9]Low (0.1-0.3 %) — extruded POM-C stock takes up 0.18 % in 24 h and 0.80 % at saturation (ASTM D570)[2]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[13]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[13]Not documented
Storage requirementSealed with desiccant; Polymaker groups PETG with the highly hygroscopic materials[13][10]Not documented
Mechanical Properties
Tensile strength (XY)MPa59.9 ± 0.8 printed XY, ISO 527 (Fiberon PET-GF15)[1]66.9 at break and 64.1 at yield (extruded POM-C stock, ASTM D638; converted from 9700 and 9300 psi)[2]
Young's modulusMPa4144 ± 133 printed XY, ISO 527 (Fiberon PET-GF15)[1]2275 (extruded POM-C stock, ASTM D638; converted from 330,000 psi)[2]
Elongation at break%4.0 ± 0.5 printed XY, ISO 527 (Fiberon PET-GF15)[1]40 at break and 9 at yield (extruded POM-C stock, ASTM D638)[2]
Flexural strengthMPa104.2 ± 2.4 printed XY, ISO 178 (Fiberon PET-GF15)[1]89.6 (extruded POM-C stock, ASTM D790; converted from 13,000 psi)[2]
Flexural modulusMPa3705 ± 85 printed XY, ISO 178 (Fiberon PET-GF15)[1]2758 (extruded POM-C stock, ASTM D790; converted from 400,000 psi)[2]
Charpy impact, notchedkJ/m²8.7 ± 0.6 printed XY, ISO 179, notched (Fiberon PET-GF15)[1]Not documented
Other impact dataCharpy unnotched 27.2 ± 2.0 printed XY (Fiberon PET-GF15, ISO 179)[1]Izod 53 J/m on extruded POM-C stock, converted from 1.0 ft-lb/in[2]
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]Tough — absorbs impact, yields before breaking; extruded stock elongates 40 % before failing. No printed figure is published[2]
Hardness (scale-specific)Shore A / Shore D / RockwellNot documentedRockwell 86 (and R120) — the source names only the R scale on extruded POM-C stock (ASTM D785)[2]
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[14][15][16]Not documented
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][17]Not documented
Elasticity / flexibility1–5Rigid[1]Not documented
Z strength as % of XY%80 (Fiberon PET-GF15, printed Z against XY tensile)[1]Not documented
Wear resistance & frictionNot documentedWear factor 65e-10 in3*min/(ft*lb*h) and a dynamic coefficient of friction of 0.21 at 40 psi and 50 fpm (ASTM D3702, extruded stock) — the properties that make acetal the default gear and bushing plastic; Apium lists good sliding properties as the reason for its grade[2][3]
Thermal Properties
HDT at 0.45 MPa°C81.6 as printed, 133.7 after annealing (ISO 75, 0.45 MPa)[1]158 (extruded POM-C stock, ASTM D648 at 66 psi; converted from 316 °F)[2]
HDT at 1.8 MPa°C71.8 as printed, 87.3 after annealing (ISO 75, 1.8 MPa)[1]110 (extruded POM-C stock, ASTM D648 at 264 psi; converted from 230 °F)[2]
Glass transition (Tg)°C59.5 (DSC)[1]Not documented
Melting point / Vicat°C231.6 melting (DSC); Vicat 232.6 (ISO 306)[1]165 melting (extruded POM-C stock; converted from 329 °F)[2]
Continuous service temperature°CNot documented91 long term and 141 intermittent (extruded POM-C stock; converted from 195 °F and 285 °F)[2]
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)[18]84.6 (extruded POM-C stock, ASTM D696; source states 4.7e-5 in/in/°F)[2]
Flammability / UL 94UL 94 HB at 1.5 mm (Fiberon PET-GF15)[1]UL 94 HB on extruded POM-C stock[2]
Environment & Chemical
Chemical resistanceWithstands acids, alkalis, oils and UV exposure[10]Good chemical resistance, particularly to bases; Apium lists resistance to bases as a headline property[2][3]
Water / humidity resistance in service1–5Not documentedGood — minor absorption; 0.80 % water at saturation (ASTM D570, extruded stock)[2]
Food contactNot certified for food contact as filament[10]Not documented
Biodegradability / compostabilityNot biodegradable[10]Not documented
RecyclabilityNot accepted in household plastic collection[10]Not documented
Electrical & ESD propertiesSurface resistivity above 10¹² ohm — insulating (Fiberon PET-GF15, ANSI/ESD S11.11)[1]Volume resistance 1e14 ohm-cm, dielectric strength 500 V/mil and dielectric constant 3.7 at 60 Hz on extruded stock (ASTM D257, D149, D150); Apium's filament grade adds antistatic agents[2][3]
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[19]Not documented
Ventilation / filtration requirement1–5Open a window / occasional ventilation[19]Not documented
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[12]Easy to machine — Ensinger lists machinability as a headline property of POM-C stock[2]
Gluing & solvent weldingCyanoacrylate; no common solvent welds PETG cleanly[12]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[12]Not documented
Support material pairingPrints its own supports; Polymaker rates PolyDissolve S1 for PETG[12]Not documented
Solvents & Solubility
Soluble inNo common workshop solvent; dichloromethane — a carcinogen — dissolves the matrix surface, 1,2-dichloroethane destroys it in a week.[20][21]Hexafluoroisopropanol dissolves it at room temperature; NMP and DMF only when hot. Laboratory reagents.[22]
Softened or crazed byAcetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[20]Acids, oxidants, halogens and hot concentrated zinc chloride attack it; alcohols, ketones and esters do not.[22][23]
Solvent welding & smoothing agentDichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[21]None — no solvent softens POM below its melting point, which is why it is bolted or heat-welded rather than glued.[22]

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. TECAFORM AH natural (POM-C) — stock shape properties Ensinger · 2026-08 · tds
  3. POM-C ESD 3D printing — material page Apium 3D Technologies · 2026-08 · doc
  4. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  5. Polymaker product catalogue Polymaker · 2026-08 · vendor
  6. 3DJAKE product catalogue 3DJAKE · 2026-08 · vendor
  7. igo3d product sitemap (17452 product URLs) igo3d · 2026-08 · vendor
  8. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  9. Prusament PETG Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  10. PETG — material basics Polymaker Wiki · 2026-08 · doc
  11. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  12. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  13. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  14. Extrudr PETG vs PCTG vs XPETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  15. Prusament PETG-CF vs PETG V0 vs PETG — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  16. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  17. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  18. 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
  19. 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
  20. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  21. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  22. Resistance of Ultramid, Ultraform and Ultradur to chemicals (TI-KTU/AS-28 e) BASF · 2000-10 · tds
  23. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds