3D Printing Info

Filament comparison

PA12-GF vs PP-GF

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

Glass-fibre PA12 (PA12-GF) guideGlass-fibre PP (PP-GF) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PA12-GF comparisonsMore PP-GF comparisons
PA12-GF vs PP-GF — documented properties and sources
PropertyGlass-fibre PA12 (PA12-GF)PAGlass-fibre PP (PP-GF)POLYOLEFIN
Market snapshot
Listing priceUSD/kg; dated snapshots$130.67/kg median; $46.00–$140.18/kg across 3 dated product listings$49.09/kg median; $46.27–$86.01/kg across 3 dated product listings
Identity & Market
Base polymer / chemistryPA12 reinforced with chopped glass fibre — 3DXTech's grade is nominally 30 wt%[1]Polypropylene reinforced with chopped glass fibre[2][3]
Densityg/cm³1.23 (ISO 1183)[1]1.12 (Prusament PP Glass Fiber, ISO 1183) — the glass lifts it above water[2]
Typical priceUSD/kg1 kg-equivalent spools span 46–140; the middle of the market is about 88[4][5][6]1 kg-equivalent spools cluster near 49[7][8][9]
Price range across brandsUSD/kg46–140 across brands; IEMAI 3D 46, 3DXTech 131 at 750 g and 130 at 2 kg, PrimaCreator NylonPower Glass Fiber 140 at 500 g[4][5][6]46-86 across brands; BCN3D PP GF30 46 at 700 g, BASF Ultrafuse PP GF30 49 at 2.2 kg, Prusament PP Glass Fiber 86 at 850 g[7][8][9]
Market availability1–5Available from several mainstream brands[4][5]Available from several mainstream brands[7][8][9]
Spool sizes & diameters1.75 and 2.85 mm; 0.5, 0.75 and 2 kg spools[4][6]1.75 and 2.85 mm; 700 g, 850 g and 2.2 kg spools[7][8][9]
Typical applicationsStiff, humidity-stable structural parts — the glass gives the modulus, the PA12 matrix limits the moisture drift[1][10]Stiff, chemically resistant parts where PP-CF's cost or conductivity is unwanted[3]
Diameter tolerance± mmNot documented±0.04 (Prusament)[2]
Printing Parameters
Nozzle temperature°CNot documented245 ± 10 (Prusament) — 25 °C below the carbon-fibre grade[2][11]
Bed temperature°CNot documented95 ± 10 (Prusament)[2]
Enclosure / chamber requirement1–5Enclosure required (passive)[12]Enclosure recommended — Simplify3D lists an enclosure as a hardware requirement and Polymaker advises one below 70 °C ambient to stop warping and cracking[13][14]
Part cooling fanNot documentedOff — Prusa runs 0 % except 100 % on bridges[2]
Bed surface & adhesion aidPEI sheet with a glue stick, or a dedicated adhesive such as Magigoo[15][12]Not documented
Maximum volumetric flow (mm³/s; see test conditions)mm³/sNot documented4 at Prusa's 50 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer[2][16]
Warping tendency1–5Not documentedHigh — enclosure needed for reliable large parts; Prusa recommends a brim[2]
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[15]Very difficult — special plates or slurry required[2]
Stringing / oozing tendency1–5Moderate — retraction tuning needed[12]Not documented
Overall printing difficulty1–5Advanced — enclosure, hardware upgrades, tuning[12]Advanced — enclosure, hardware upgrades, tuning; hardened nozzle mandatory[2]
Extruder requirementNot documentedPrusa states a hardened nozzle is necessary and recommends a brim[2]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — no nozzle-life figure is published for a PA12-GF30 grade; Polymaker measures about 9 h of brass nozzle life on its comparable fibre-filled nylons[17]Hardened steel required[2]
Abrasiveness1–5Highly abrasive — standard GF composite[17]Highly abrasive — standard GF composite[2]
Nozzle clog risk1–5High — jams from moisture, heat creep or particles[18]Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[19]
Heat-creep / jam sensitivity1–5Moderate — good heatbreak cooling needed[15]Not documented
Hotend requirementMay require an all-metal hot end (Simplify3D)[15]Not documented
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5High (0.8–2 %) — the PA12 matrix takes up far less than PA6, on the evidence of Polymaker's 1.5 % for PA12-CF10 against 3.33 % for PA6-GF25[20][21]Low (0.1–0.3 %) — 0.11 % at both 24 h and 7 days, higher than the carbon-fibre grade's 0.04 % but still very low[2][11]
Equilibrium moisture content at ~50 % RH%Not documented0.11 after 24 h and 0.11 after 7 days at 24 °C / 22 % RH (Prusa Polymers)[2]
Effect of moisture on strengthPolymaker's PA12 grades change little between wet and dry, unlike PA6; the CoPA dry-to-wet blocks show the PA6-type response[10][22]Not applicable in practice at 0.11 % equilibrium uptake[2]
Storage requirementSealed below 20 % RH with desiccant[18]No special storage needed[2]
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[17][22]Not documented
Mechanical Properties
Tensile strength (XY)MPa82 at break (printed XY, ISO 527)[1]46.6 ± 1.3 filament tensile yield (Prusament, ISO 527) — more than double the carbon-fibre grade's 21[2][11]
Young's modulusMPa7800 (printed XY, ISO 527)[1]Not documented
Elongation at break%4.5 at break (printed XY, ISO 527) — nearly double the 2.4 % of Polymaker's PA6-GF25[1][21]Not documented
Flexural strengthMPa94 (printed XY, ISO 178)[1]Not documented
Flexural modulusMPa7550 (printed XY, ISO 178)[1]Not documented
Charpy impact, notchedkJ/m²Not documented7.9 ± 0.4 printed horizontal and 9.9 ± 0.8 printed vertical XZ (ISO 179-1, notched)[2]
Brittleness1–5Moderate[1]Moderate[2]
Hardness (scale-specific)Shore A / Shore D / RockwellRockwell M88 / R117 on extruded PA66-GF30 stock (ASTM D785); no figure is published for a glass-fibre PA12 filament[23]Rockwell R102 (and M95) on extruded unfilled PP stock (ASTM D785); no figure is published for a glass-fibre PP filament[24]
Creep resistance / sustained load1–5Good. Ensinger lists high creep resistance for extruded PA66-GF30 stock, and the PA12 matrix absorbs far less water than PA6, so a PA12-GF part holds load better in a humid environment[23][12]Not documented
Fatigue / repeated-flex resistance1–5Good. Ensinger lists high fatigue strength as a headline property of extruded PA66-GF30 stock[23]Not documented
Elasticity / flexibility1–5Rigid[1]Rigid[2]
Thermal Properties
HDT at 0.45 MPa°CNot documented138.3 (ISO 75, 0.45 MPa)[2]
HDT at 1.8 MPa°CNot documented112.6 (ISO 75, 1.8 MPa)[2]
Thermal expansion (CTE)µm/m·K48.6 on extruded PA66-GF30 stock (ASTM D696; source states 2.7e-5 in/in/°F) — no figure is published for a glass-fibre PA12 filament[23]Not documented
Flammability / UL 94Flammable; no UL 94 rating published for the grades surveyed[17]Not documented
Environment & Chemical
UV resistance1–5Months outdoors before embrittlement — unstabilised polyamide yellows under UV[12]Not documented
Chemical resistanceWithstands oils, fuels and alkalis[12]Excellent against acids, alkalis and most solvents[14]
Water / humidity resistance in service1–5Good — minor absorption relative to PA6-based composites[10]Excellent — essentially unaffected[2]
Food contactNot food-contact certified as filament[12]Not documented
Biodegradability / compostabilityNot biodegradable[12]Not documented
RecyclabilityNot accepted in household plastic collection[12]Not documented
Electrical & ESD propertiesSurface resistance above 10¹³ ohm/sq — insulating (ASTM D257)[1]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[25]Low hazard — minimal VOC and particle emission. Inferred: no polyolefin was among the nine filaments in the Azimi chamber study, so this is a family-level judgement rather than a measurement[25]
VOC emission rateµg/minUp to 180 caprolactam, the dominant VOC from nylon and the largest single-VOC rate in the study[25]Not documented
Ultrafine-particle emission rateparticles/min≈2 × 10⁸ median for nylon — low for particles despite the highest VOC mass measured[25]Not documented
Hazardous species emittedCaprolactam, at up to 180 µg/min from nylon filament[25]Not documented
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[25]Open a window / occasional ventilation. Inferred — no polyolefin was measured in the chamber study[25]
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[1]Glass fibre is bound in the matrix; avoid inhaling sanding dust[2]
Post-Processing
Sanding & machiningSands poorly — gums rather than powders[15]Not documented
Gluing & solvent weldingCyanoacrylate; no common solvent welds polyamide[15]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[15]Not documented
Solvents & Solubility
Soluble inFormic acid, phenol, m-cresol and hexafluoroisopropanol dissolve the matrix at 23 °C, leaving the fibre; laboratory reagents.[26]None at room temperature; chloroform dissolves the matrix at 60 °C and xylene at about 118 °C, leaving the fibre.[27][28]
Softened or crazed byZinc chloride solutions stress-crack the nylon matrix, alcoholic calcium chloride dissolves it, mineral acids attack it.[26]Xylene, decalin, CCl4 and chlorobenzene are heavily absorbed at 20 °C; oleum, chlorosulphonic acid and bromine destroy it.[27]
Solvent welding & smoothing agentNone — nylon's only solvents (formic acid, phenol, HFIP) degrade the part, and the fibre blocks surface flow anyway.[26]None — nothing softens PP at room temperature, so joints have to be welded thermally rather than chemically.[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. FibreX PA12-GF30 Technical Data Sheet v1.0 3DXTech · 2026-08 · tds
  2. Prusament PP Glass Fiber Technical Datasheet v1.0 Prusa Polymers · 2024-11 · tds
  3. Prusament PP Glass Fiber — material page Prusa Polymers · 2026-08 · doc
  4. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  5. IEMAI 3D GF-PA12 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  6. PrimaCreator SELECT NylonPower Glass Fiber product page PrimaCreator · 2026-08 · vendor
  7. BASF Ultrafuse PP GF30 Black 2.85 mm 2.200 g igo3d · 2026-08 · vendor
  8. BCN3D PP GF30 Black 2.85 mm 700 g igo3d · 2026-08 · vendor
  9. Prusa Prusament PP Glass Fiber Natural (NFC), 1.75 mm / 850 g 3DJAKE · 2026-08 · vendor
  10. Moisture Conditioning — effect on printed nylon properties Polymaker Wiki · 2026-08 · doc
  11. Prusament PP Carbon Fiber Technical Datasheet v1.0 Prusa Polymers · 2024-11 · tds
  12. PA (Nylon) — material basics Polymaker Wiki · 2026-08 · doc
  13. Polypropylene — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  14. PP — material basics Polymaker Wiki · 2026-08 · doc
  15. Nylon — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  16. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  17. Fiberon PA6-CF20 Technical Data Sheet V1.1 Polymaker · 2024-12 · tds
  18. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  19. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  20. Fiberon PA12-CF10 Technical Data Sheet V1.1 Polymaker · 2025-02 · tds
  21. Fiberon PA6-GF25 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. TECAMID 66 GF30 black (PA66-GF30) — stock shape properties Ensinger · 2026-08 · tds
  24. TECAFINE PP natural — stock shape properties Ensinger · 2026-08 · tds
  25. 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
  26. Ultramid Nylon Chemical Resistance guide (unmodified PA6 B27E and PA66 A27E) BASF · 2026-08 · tds
  27. Pro-fax and Moplen polypropylene — Chemical Resistance Guide (20, 60 and 100 °C) LyondellBasell · 2026-08 · tds
  28. US 5,278,282 Polymer recycling by selective dissolution — xylene dissolution temperatures Nauman & Lynch, Rensselaer Polytechnic Institute · 1994-01 · paper