3D Printing Info

Filament comparison

PA6-GF vs TPU 95A

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

Glass-fibre PA6 (PA6-GF) guideTPU 95A guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PA6-GF comparisonsMore TPU 95A comparisons
PA6-GF vs TPU 95A — documented properties and sources
PropertyGlass-fibre PA6 (PA6-GF)PATPU 95AFLEX
Market snapshot
Listing priceUSD/kg; dated snapshots$59.98/kg median; $39.99–$130.00/kg across 6 dated product listings$39.99/kg median; $23.00–$106.05/kg across 15 dated product listings
Identity & Market
Base polymer / chemistryPA6 reinforced with chopped glass fibre — Polymaker's grade is 25 wt%[1][2]Thermoplastic polyurethane, polyester or polyether based, at about 92–95 Shore A[3][4]
Densityg/cm³1.14 (Bambu Lab) and 1.20 (Polymaker Fiberon), ISO 1183[2][1]1.20–1.25 (ISO 1183); Prusament 1.25, Polymaker 1.20–1.24, Bambu Lab 1.22[3][4][5]
Typical priceUSD/kg1 kg-equivalent spools span 40–130; the middle of the market is about 60[2][6][7]1 kg spools cluster near 35; the specialist and industrial brands run to 106[6][8][5][9][10][11]
Price range across brandsUSD/kg40–130 across brands; SUNLU 40, YXPOLYER 45, Polymaker Fiberon and Bambu Lab 60, 3DXTech FibreX 87, Obsidian Nylon 6+GF 130[6][2][12][7][13]23–106 across brands; IEMAI 3D 23, LANDU 24, Siraya Tech 25, PS Imports 25, PrimaCreator 32, Bambu Lab 35–42, Polymaker 40–50, add:north 72, Recreus 90, 3DXTech 96, NinjaTek Cheetah 106[8][14][6][12][9][10][15][16][17][11]
Market availability1–5Stocked by most mainstream brands[2][6][12][7][13]Ubiquitous, every brand and retailer[6][12][8][14][9][10]
Spool sizes & diameters1.75 and 2.85 mm; 0.5, 0.75 and 1 kg spools[6][12][2]1.75 and 2.85 mm; 0.5, 0.75 and 1 kg spools[6][12]
Typical applicationsStiff, heat-resistant structural parts where a matte finish and lower cost beat carbon fibre[2][1]Gaskets, phone cases, tyres, vibration mounts and protective covers[18]
Diameter tolerance± mmNot documented±0.06 (Prusament) — the loosest tolerance Prusa publishes, because soft filament deforms in the gauge[4]
Printing Parameters
Nozzle temperature°C260–290 (Bambu Lab)[2]210–240; Polymaker 210–230, Prusament 230 ± 10, Bambu Lab HF 220–240[3][4][5]
Bed temperature°CNot documented25–65; Prusament 65 ± 10, Bambu Lab 30–35, Polymaker 25–60[4][5][3]
Enclosure / chamber requirement1–5Enclosure required (passive) — Bambu Lab specifies a 45–60 °C chamber[2]Open frame is fine[3]
Recommended chamber temperature°C45–60 (Bambu Lab)[2]Not documented
Part cooling fanNot documentedFan on[3][5]
Bed surface & adhesion aidPEI sheet with a glue stick, or a dedicated adhesive such as Magigoo[19][20]PEI sheet or painter's tape; Polymaker warns TPU can over-stick and advises a glue stick as a release agent[21][18]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s10 at Bambu Lab's 130 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer[2][22]2.4 at Polymaker's 30–50 mm/s and 2.4 at Prusa's 30 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer; Bambu Lab's high-flow grade lifts the cap to 200 mm/s (16 mm³/s)[3][4][5]
Warping tendency1–5Not documentedNone[3]
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[19]Sticks to most surfaces[3]
Stringing / oozing tendency1–5Moderate — retraction tuning needed[20]Moderate — retraction tuning needed; Polymaker specifies 3–6 mm retraction, well above the 1–3 mm used for rigid filaments[3]
Overall printing difficulty1–5Expert / industrial hardware only[2][23]Intermediate — dry filament and a tuned profile; the speed ceiling is the main constraint[3][4]
Extruder requirement0.6 mm nozzle recommended by Bambu Lab; 0.4 and 0.8 also supported[2]Direct drive strongly preferred. BASF rates its 95A grade as running on both direct-drive and Bowden machines, but every maker caps speed at 15–50 mm/s unless the grade is specifically high-flow[24][3][4]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — Polymaker measures brass nozzle life at about 9 h on PA6-GF25 and recommends hardened steel or ruby[1]Brass fine indefinitely[25]
Abrasiveness1–5Highly abrasive — standard GF composite; Polymaker puts brass nozzle life at roughly 9 h on PA6-GF25[1]Non-abrasive[25]
Nozzle clog risk1–5Very high — frequent jams without careful setup[23]Moderate — needs dry filament and a clean nozzle[23]
Heat-creep / jam sensitivity1–5Moderate — good heatbreak cooling needed[19]High — all-metal hotend and strong cooling needed; soft filament buckles in the cold zone if it slows[18]
Hotend requirementMay require an all-metal hot end (Simplify3D)[19]No special hot-end required, but a direct-drive extruder is (Simplify3D)[21]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Very high (>2 %) — 2.56 % saturated at 25 °C / 55 % RH (Bambu Lab) and 3.33 % equilibrium (Polymaker Fiberon), the highest in the dataset[2][1]Low (0.1–0.3 %) by Prusa's measurement at 0.04 % in 7 days, but Polymaker measures 0.82 % equilibrium and groups TPU with the highly hygroscopic materials[4][3][23]
Equilibrium moisture content at ~50 % RH%2.56 saturated at 25 °C / 55 % RH (Bambu Lab); 3.33 equilibrium (Polymaker Fiberon PA6-GF25)[2][1]0.82 equilibrium (Polymaker); 0.02 after 24 h and 0.04 after 7 days at 22 % RH (Prusa)[3][4]
Drying temperature & time80 °C for 8–12 h (Bambu Lab)[2]70 °C for 8 h (Polymaker); 70 °C for 8 h or an 80–90 °C heatbed for 12 h (Bambu Lab)[3][5]
Symptoms when wetPopping and cracking during extrusion, then hard-to-diagnose defects[26]Bubbling and popping at the nozzle, stringing, rough surface and weak layers[23]
Effect of moisture on strengthPolymaker publishes dry and wet printed blocks for PA6-GF25 itself: at 4.57 % moisture tensile falls 80.1 → 40.2 MPa and modulus 5357 → 1794 MPa, while notched Charpy rises 10.0 → 28.0 kJ/m²[1][26]Polymaker groups TPU with nylon, PVA and PETG as highly hygroscopic and says these often need to stay in a dryer while printing; no dry-versus-conditioned figures are published[23]
Storage requirementSealed below 20 % RH with desiccant[23]Sealed with desiccant; often kept in a dryer during the print[23]
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[27][28]Not documented
Mechanical Properties
Tensile strength (XY)MPa75 ± 6 (Bambu Lab) and 80.1 ± 1.8 (Polymaker Fiberon, dry/annealed) printed XY, ISO 527; Fiberon falls to 40.2 ± 2.1 conditioned to 4.57 % moisture. Stratasys FDM PA6/66-GF30-FR gives 60.2-61.1 at break and 61.7-62.3 at yield printed XZ (ASTM D638)[2][1][29]41.4 ± 1.3 printed (Prusament, ISO 37); NinjaTek Cheetah 39 ultimate (ASTM D638)[4][30]
Young's modulusMPa2850 ± 260 (Bambu Lab) and 5357 ± 211 (Polymaker Fiberon, dry) printed XY, ISO 527; Fiberon falls to 1794 ± 84 conditioned. Stratasys FDM PA6/66-GF30-FR gives 5600-5830 printed XZ against 3050-3140 in ZX (ASTM D638)[2][1][29]Not documented
Elongation at break%2.4 ± 0.2 dry (Polymaker Fiberon) to 3.9 ± 0.8 (Bambu Lab) printed XY, ISO 527; the Fiberon grade rises to 4.2 ± 0.7 conditioned[2][1]551 ± 24 printed (Polymaker, ISO 37); the filament itself stretches 7264 % before break (Prusa, ISO 527)[3][4]
Flexural modulusMPa3670 ± 140 printed XY, ISO 178 (Bambu Lab)[2]Not documented
Charpy impact, notchedkJ/m²10.0 ± 0.7 printed XY dry and 28.0 ± 1.0 conditioned, ISO 179 notched (Polymaker Fiberon); Bambu Lab 7.2 ± 2.3[1][2]Not documented
Other impact dataCharpy unnotched 27.2 ± 2.2 printed XY (Bambu Lab, ISO 179). Stratasys FDM PA6/66-GF30-FR gives Izod notched 74.6-77.1 J/m printed XZ against 17.2-22.1 in ZX (ASTM D256)[2][29]Not documented
Layer adhesion / Z tensileMPa27 ± 5 (Bambu Lab) and 60.7 ± 1.1 (Polymaker Fiberon, dry) printed Z, ISO 527 — the two makers differ by more than a factor of two; Fiberon falls to 26.3 ± 1.5 conditioned. Stratasys FDM PA6/66-GF30-FR gives 23.7-24.4 at break printed ZX (ASTM D638)[2][1][29]9.5 ± 0.2 (Prusament interlayer adhesion, ISO 527)[4]
Brittleness1–5Brittle — snaps with little warning; elongation at break 2.4 % in XY[1]Very ductile — bends far before failing[3][4]
Hardness (scale-specific)Shore A / Shore D / RockwellRockwell M88 / R117 on extruded PA66-GF30 stock (ASTM D785)[31]92 ± 0.4 Shore A and 39 ± 0.7 Shore D (Prusament); 95A (Polymaker, ISO 7619-1); 91 Shore A / 40 Shore D (Fiberlogy FiberFlex 40D, ISO 7619); 95A (NinjaTek Cheetah, ASTM D2240); 94.5 A measured on a printed Bambu Lab 95A part and 96.2 A on a Qidi one (My Tech Fun)[4][3][32][30][33]
Creep resistance / sustained load1–5Good. Ensinger lists high creep resistance as a headline property of extruded PA66-GF30 stock; the rating is held below Excellent because equilibrium moisture uptake of 3.33 % softens the matrix in service[31][1]Poor — deforms under load at room temperature; a loaded bar crept from 74.5 to 82.7 mm over 5 days[33]
Fatigue / repeated-flex resistance1–5Good. Ensinger lists high fatigue strength as a headline property of extruded PA66-GF30 stock[31]Excellent — living hinges viable[18]
Elasticity / flexibility1–5Rigid[2]Rubbery / highly elastic[3][4]
Z strength as % of XY%36 (Bambu Lab) to 76 (Polymaker Fiberon), printed; Stratasys FDM PA6/66-GF30-FR gives 39-41 (ZX against XZ tensile at break, ASTM D638)[2][1][29]Not documented
Wear resistance & frictionNot documentedAbrasion resistance is a headline property; BASF measures 64 mm³ loss by ISO 4649 on its 92A grade[24]
Thermal Properties
HDT at 0.45 MPa°C182 (Bambu Lab) and 191 (Polymaker Fiberon), ISO 75 at 0.45 MPa. Stratasys FDM PA6/66-GF30-FR gives 161 printed XY and 185 XZ (ASTM D648 at 66 psi)[2][1][29]Not documented
HDT at 1.8 MPa°C157 (Polymaker Fiberon) and 158 (Bambu Lab), ISO 75 at 1.8 MPa[2][1]Not documented
Glass transition (Tg)°C67 (Bambu Lab) and 70.4 (Polymaker Fiberon), DSC; Stratasys measures 51.5 on FDM PA6/66-GF30-FR (ASTM D7426)[2][1][29]Not documented
Melting point / Vicat°C214.5 (Polymaker Fiberon) and 219 (Bambu Lab) melting, DSC; Vicat 210–212 (ISO 306)[2][1]144 melting (BASF 95A, ISO 11357-3); Bambu Lab 183, Polymaker's modulus at 100 % elongation 8.9 MPa[24][5]
Continuous service temperature°CNot documentedBounded by a melting point of 144–183 °C; no loaded-bar service figure is published for TPU[24][5]
Thermal expansion (CTE)µm/m·K48.6 on extruded PA66-GF30 stock (ASTM D696; source states 2.7e-5 in/in/°F). Stratasys measures much higher on printed FDM PA6/66-GF30-FR — 95.4 over -20 to 5 °C and 214 over 25 to 80 °C in XY (ASTM E831)[31][29]Not documented
Flammability / UL 94Flammable; no UL 94 rating published for the grades surveyed[27]Flammable; no UL 94 rating published for the grades surveyed[3]
Environment & Chemical
UV resistance1–5Months outdoors before embrittlement — unstabilised polyamide yellows under UV[20]Good — years with some colour shift; Polymaker lists UV exposure among the conditions TPU withstands[18]
Chemical resistanceWithstands oils, fuels and alkalis[20]Good resistance to oils and common solvents (BASF)[24]
Water / humidity resistance in service1–5Absorbs water, properties shift[26]Not documented
Food contactNot food-contact certified as filament[20]Not food safe without specific certification (Polymaker)[18]
Biodegradability / compostabilityNot biodegradable[20]Not biodegradable[18]
RecyclabilityNot accepted in household plastic collection[20]Not accepted in household plastic collection[18]
Electrical & ESD propertiesSurface resistivity above 10¹² ohm — insulating (Polymaker Fiberon, ANSI/ESD S11.11)[1]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[34]Low hazard — minimal VOC and particle emission; TPU was not among the nine filaments in the chamber study[34]
VOC emission rateµg/minUp to 180 caprolactam, the dominant VOC from nylon and the largest single-VOC rate in the study[34]Not documented
Ultrafine-particle emission rateparticles/min≈2 × 10⁸ median for nylon — low for particles despite the highest VOC mass measured[34]Not documented
Hazardous species emittedCaprolactam, at up to 180 µg/min from nylon filament[34]Not documented
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[34]Open a window / occasional ventilation[34]
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[1]Not documented
Post-Processing
Sanding & machiningSands poorly — gums rather than powders[19]Sanding is impractical — the surface tears rather than abrades[18]
Gluing & solvent weldingCyanoacrylate; no common solvent welds polyamide[19]Cyanoacrylate bonds TPU; no common solvent welds it[18]
Vapour / chemical smoothingNo practical vapour smoothing[19]No practical vapour smoothing[18]
Support material pairingNot documentedPolymaker warns TPU supports are often very difficult to remove; PolyDissolve S1 is rated for TPU[18]
Dimensional accuracy & detailNot documentedStringing and elephant-foot are the accuracy limits; retraction has to be long and slow[3]
Solvents & Solubility
Soluble inFormic acid, phenol, m-cresol and hexafluoroisopropanol dissolve the matrix at 23 °C, leaving the fibre; laboratory reagents.[35]DMF, DMSO, NMP and THF dissolve TPU; acetone, MEK and cyclohexanone are partial solvents. All laboratory reagents.[36]
Softened or crazed byZinc chloride solutions stress-crack the nylon matrix, alcoholic calcium chloride dissolves it, mineral acids attack it.[35]Toluene and benzene swell it up to +50 % by weight at 23 °C; esters swell it severely; ethanol and IPA soften it.[36]
Solvent welding & smoothing agentNone — nylon's only solvents (formic acid, phenol, HFIP) degrade the part, and the fibre blocks surface flow anyway.[35]None practical — the true solvents (DMF, THF, NMP) are laboratory reagents and leave the joint swollen and weak.[36]

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 PA6-GF25 Technical Data Sheet V1.1 Polymaker · 2024-12 · tds
  2. Bambu Filament Technical Data Sheet — PA6-GF Bambu Lab · 2026-08 · tds
  3. PolyFlex TPU95 Technical Data Sheet V5.4 Polymaker · 2024-11 · tds
  4. Prusament TPU 95A Technical Datasheet v1.0 Prusa Polymers · 2025-05 · tds
  5. Bambu Filament Technical Data Sheet — TPU 95A HF Bambu Lab · 2026-08 · tds
  6. Polymaker product catalogue Polymaker · 2026-08 · vendor
  7. SUNLU Nylon-6 Glass Fiber (PA6-GF) 3D Printer Filament 1 kg — product page SUNLU · 2026-08 · vendor
  8. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  9. LANDU TPU 3D Printer Filament 1.75 mm 95A Black 1 kg — Amazon listing Amazon.com · 2026-08 · vendor
  10. IEMAI 3D TPU 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  11. Cheetah product page — print guidelines, spool sizes and price NinjaTek · 2026-08 · vendor
  12. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  13. YXPOLYER PA6-GF Black 1 kg — product page YXPOLYER · 2026-08 · vendor
  14. TPU for AMS — product page Bambu Lab US Store · 2026-08 · vendor
  15. Siraya Tech Flex TPU 95A Filament — product page Siraya Tech · 2026-08 · vendor
  16. PrimaCreator EasyPrint FLEX TPU 95A product page PrimaCreator · 2026-08 · vendor
  17. add:north TPU Pro Matte 95A product page add:north · 2026-08 · vendor
  18. TPU — material basics Polymaker Wiki · 2026-08 · doc
  19. Nylon — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  20. PA (Nylon) — material basics Polymaker Wiki · 2026-08 · doc
  21. Flexible (TPE/TPU) — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  22. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  23. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  24. Ultrafuse TPU 95A Technical Data Sheet (Version 2.0) BASF Forward AM · 2022-08 · tds
  25. Extrudr Product Catalogue (DURAPRO PA12 data block) Extrudr · 2025-03 · tds
  26. Moisture Conditioning — effect on printed nylon properties Polymaker Wiki · 2026-08 · doc
  27. Fiberon PA6-CF20 Technical Data Sheet V1.1 Polymaker · 2024-12 · tds
  28. PolyMide CoPA Technical Data Sheet V5.4 (dry and wet status blocks) Polymaker · 2024-11 · tds
  29. FDM PA6/66-GF30-FR — Material Data Sheet Stratasys · 2026-07 · tds
  30. NinjaTek technical specs comparison chart (Cheetah, NinjaFlex, Armadillo, Alloy 910, Nylon 645) NinjaTek · 2026-08 · tds
  31. TECAMID 66 GF30 black (PA66-GF30) — stock shape properties Ensinger · 2026-08 · tds
  32. FiberFlex 40D Technical Data Sheet Fiberlogy · 2026-08 · tds
  33. BambuLab TPU 95A HF vs Qidi TPU 95A HF — results spreadsheet My Tech Fun (Igor Gaspar) · 2024-02 · test
  34. 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
  35. Ultramid Nylon Chemical Resistance guide (unmodified PA6 B27E and PA66 A27E) BASF · 2026-08 · tds
  36. Elastollan — Chemical properties: swelling and chemical resistance BASF · 2026-08 · tds