3D Printing Info

Filament comparison

PLA HS vs TPU 98A

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

High-Speed PLA guideTPU 98A / hard TPU guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PLA HS comparisonsMore TPU 98A comparisons
PLA HS vs TPU 98A — documented properties and sources
PropertyHigh-Speed PLAPLATPU 98A / hard TPUFLEX
Market snapshot
Listing priceUSD/kg; dated snapshots$19.99/kg median; $11.49–$32.99/kg across 10 dated product listings$94.99/kg median; $34.99–$149.99/kg across 3 dated product listings
Identity & Market
Base polymer / chemistryPLA with rheology and crystallisation tuned for high volumetric flow; melt index 15.4 g/10 min vs 7–11 for standard PLA[1][2]Hard thermoplastic polyurethane at 98 Shore A to about 60 Shore D — the rigid end of the TPU range[3][4]
Densityg/cm³1.23 (ISO 1183, at 21.5 °C)[1]1.23 (Fillamentum Flexfill 98A); 1.2 (Extrudr FLEX HARD, ISO 2781)[3][4]
Typical priceUSD/kgMainstream 1 kg spools cluster near 20[5][6][7]1 kg spools cluster near 150[8]
Price range across brandsUSD/kg11–33 across brands; budget house brands 11–18, Prusament 33[9][10][11]95–150 across brands; Proto-pasta Clear Rigid TPU 95, Push Plastic TPU 100A 150[12][8]
Market availability1–5Stocked by most mainstream brands[13][7][14]Available from several mainstream brands[8][12][4]
Spool sizes & diameters1.75 mm; 1 kg spools[5][7]1.75 and 2.85 mm; 0.5, 0.75 and 1 kg spools[12][8]
Typical applicationsLarge or repetitive prints on printers that can sustain high flow[15][13]Drive belts, wheels, snap-fits and bumpers that need to flex but hold shape under load[3]
Diameter tolerance± mm±0.03 (Bambu Lab PLA Basic, rated to 258 mm/s)[16]Not documented
Printing Parameters
Nozzle temperature°C210–230 for high-speed work; 190–210 at classic speeds[1][13]230–260 (Extrudr FLEX HARD)[4]
Bed temperature°C30–60 (Polymaker); 35–45 (Bambu Lab)[1][17]50–90 (Extrudr FLEX HARD)[4]
Enclosure / chamber requirement1–5Open frame is fine[1]Open frame is fine[4]
Part cooling fanFan on[1]0–30 % (Extrudr FLEX HARD)[4]
Bed surface & adhesion aidNot documentedPEI sheet or painter's tape; Polymaker warns TPU can over-stick and advises a glue stick as a release agent[18][19]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s≈24 at 300 mm/s with a 0.4 mm nozzle and 0.2 mm layer; 30 % more flow than regular PLA at the same temperature[1][13][15][20]4.6 (Extrudr FLEX HARD, stated max volumetric speed on a 0.4 mm nozzle)[4]
Warping tendency1–5None[1]None[4]
Bed-adhesion difficulty1–5Sticks to anything[21]Not documented
Overall printing difficulty1–5Easy — minor profile tuning; needs a printer that can actually reach the flow rate[13][1]Easy — minor profile tuning; at this hardness the filament pushes like a rigid material[4]
Extruder requirementNot documentedBowden viable at this hardness — Extrudr rates FLEX HARD to 100 mm/s where its soft grades cap lower[4]
Hardware Wear & Reliability
Nozzle hardness required1–4Brass fine indefinitely[22]Brass fine indefinitely[4]
Abrasiveness1–5Non-abrasive[23][22]Non-abrasive[4]
Nozzle clog risk1–5Very low[22]Low[24]
Heat-creep / jam sensitivity1–5Moderate — good heatbreak cooling needed; PLA softens below 60 °C[25]Moderate — good heatbreak cooling needed[19]
Hotend requirementNo special hot-end required[21]No special hot-end required, but a direct-drive extruder is (Simplify3D)[18]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate — 0.40 % equilibrium at 23 °C / 70 % RH[1]Moderate — the TPU family absorbs readily; Extrudr specifies a 12 h dry at 60 °C for FLEX HARD[4][24]
Equilibrium moisture content at ~50 % RH%0.40 equilibrium at 23 °C / 70 % RH (Polymaker PolySonic)[1]Not documented
Drying temperature & time55 °C for 6 h; 50 °C for 8 h (Bambu Lab)[1][17]60 °C for 12 h (Extrudr FLEX HARD)[4]
Symptoms when wetBubbling and popping at the nozzle, stringing, rough surface and weak layers[24]Bubbling and popping at the nozzle, stringing and a rough surface[24]
Effect of moisture on strengthPolymaker rates PLA low-sensitivity — the loss shows as poor layer adhesion and brittle layers rather than a published strength figure[24]Polymaker groups TPU with the highly hygroscopic materials; no dry-versus-conditioned figures are published[24]
Storage requirementSealed with desiccant below 20 % RH; shelf life at ambient is long[17][21]Sealed with desiccant; often kept in a dryer during the print[24]
Mechanical Properties
Tensile strength (XY)MPa43.9 at 300 mm/s and 46.0 at 46.7 mm/s (printed XY, ISO 527); 58.6 on My Tech Fun bars for Creality Hyper PLA[1][26]53.7 at break (Fillamentum Flexfill 98A, DIN 53504)[3]
Young's modulusMPa2650 at 300 mm/s, 2878 at classic speed (printed XY, ISO 527)[1]Not documented
Elongation at break%15.1 at 300 mm/s, 21.5 at classic speed (printed XY, ISO 527)[1]318 at break (Fillamentum Flexfill 98A, DIN 53504); Extrudr FLEX HARD 490 (ISO 527-2)[3][4]
Flexural strengthMPa71.4 at 300 mm/s, 76.5 at classic speed (printed XY, ISO 178)[1]Not documented
Flexural modulusMPa2798 at 300 mm/s, 2868 at classic speed (printed XY, ISO 178)[1]Not documented
Charpy impact, notchedkJ/m²5.0 at 300 mm/s, 6.1 at classic speed (printed XY, ISO 179, notched)[1]Not documented
Other impact dataPrinting at 300 mm/s instead of 46.7 mm/s costs 4.6 % tensile strength and 18 % notched Charpy[1]Not documented
Layer adhesion / Z tensileMPa32.4 at 300 mm/s, 37.3 at classic speed (printed Z, ISO 527); 35.3 for Creality Hyper PLA vs 23.0 for average PLA on identical bars[1][26]Not documented
Brittleness1–5Moderate[1]Very ductile — bends far before failing[3]
Hardness (scale-specific)Shore A / Shore D / Rockwell78.7 Shore D measured on printed bars for Sunlu PLA Meta (My Tech Fun), against 75.3 for the same maker's plain PLA[27]98 Shore A and 60 Shore D (Fillamentum, ISO 7619-1); Extrudr FLEX HARD 58 Shore D (ISO 868)[3][4]
Creep resistance / sustained load1–5Poor — 12 mm bar sagged to 17.7 mm over 6 days at 1.25 kg[26]Poor — no 98A creep test; a printed 95A TPU bar crept from 74.5 to 82.7 mm over 5 days at 1.25 kg[28]
Fatigue / repeated-flex resistance1–5Poor — no grade-specific S-N curve; plain printed PLA ran 38 000–49 000 cycles at 30 % of tensile strength (R = 0.2)[29][25]Excellent — living hinges viable[19]
Elasticity / flexibility1–5Rigid[1]Semi-flexible[3][4]
Z strength as % of XY%74 at 300 mm/s, 81 at classic speed (printed)[1]Not documented
Wear resistance & frictionNot documentedAbrasion 23 mm³ (Fillamentum, ISO 4649 method A) and 26 mm³ (Extrudr FLEX HARD, ISO 4649-A) — the best abrasion figures in the group[3][4]
Thermal Properties
HDT at 0.45 MPa°C53 (ISO 75, 0.45 MPa)[1]Not documented
HDT at 1.8 MPa°C52 (ISO 75, 1.8 MPa)[1]Not documented
Glass transition (Tg)°C59 (DSC)[1]Not documented
Melting point / Vicat°C164 peak melt (DSC); crystallisation 96 °C, Vicat 61 °C[1]190–210 melting (Extrudr FLEX HARD, ISO 3146-C); Vicat A 140 (ISO 306)[4]
Continuous service temperature°C53 — loaded bars begin to move at this temperature[26]Not documented
Thermal expansion (CTE)µm/m·K96–99 for plain printed PLA (fibre Bragg grating, 25–50 °C); no grade-specific measurement published[30]Not documented
Flammability / UL 94Flammable; no UL 94 rating published by the major brands[17][2]Not documented
Environment & Chemical
UV resistance1–5Degrades within weeks outdoors[25][31]Good — years with some colour shift; Polymaker lists UV exposure among the conditions TPU withstands[19]
Chemical resistanceGood against weak acids, oils and grease; poor against strong acids and alkalis[1]Withstands industrial solvents and UV exposure (Polymaker)[19]
Water / humidity resistance in service1–5Good — insoluble in water[17]Not documented
Food contactBase resin is food-contact grade, but printed layer grooves harbour bacteria; Prusa advises against food use[25]Not food safe without specific certification (Polymaker)[19]
Biodegradability / compostabilityIndustrially compostable only — needs sustained 55 °C; not home compostable[32][25]Not biodegradable[19]
RecyclabilityMechanically recyclable; not accepted in household plastic collection[32]Not accepted in household plastic collection[19]
Health & Safety
Fume toxicity1–5Low hazard — minimal VOC and particle emission[33]Low hazard — minimal VOC and particle emission; TPU was not among the nine filaments in the chamber study[33]
Ventilation / filtration requirement1–5None needed in a normal room[33]Open a window / occasional ventilation[33]
Post-Processing
Sanding & machiningWet sanding — dry sanding heats the surface by friction and smears it[31][25]Difficult to sand or smooth; Polymaker limits post-processing to trimming or tumbling[19]
Gluing & solvent weldingCyanoacrylate for most joints; some grades partially dissolve and bond with acetone[25][34]Cyanoacrylate bonds TPU; no common solvent welds it[19]
Vapour / chemical smoothingNo practical vapour smoothing — only chloroform, hot benzene or THF, which are laboratory-only[25]No practical vapour smoothing[19]
Support material pairingPolySupport and PolyDissolve S1 (Polymaker)[1]Polymaker warns TPU supports are often very difficult to remove[19]
Dimensional accuracy & detailNot documentedTear strength 170 kN/m (Fillamentum, ISO 34-1) and 175 kN/m (Extrudr FLEX HARD, ISO 34-1B)[3][4]
Solvents & Solubility
Soluble inChloroform: 10 % w/v in 2–4 h at 23 °C, every grade and morphology; THF and DMF only at 65 °C. Laboratory reagents.[35]DMF, DMSO, NMP and THF dissolve TPU; acetone, MEK and cyclohexanone are partial solvents. All laboratory reagents.[36]
Softened or crazed byAcetone, ethyl acetate and toluene plasticise it but dissolve <1 % even at 65 °C; submersion in acetone crazes and destroys parts.[35][37]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 agentChloroform vapour smooths and welds PLA at the cost of tensile strength; acetone does not smooth it at all.[38][37]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. PolySonic PLA Technical Data Sheet V5.4 Polymaker · 2024-11 · tds
  2. PolyLite PLA Technical Data Sheet V5.4 Polymaker · 2024-11 · tds
  3. Flexfill TPU 98A Technical Data Sheet Fillamentum · 2019-08 · tds
  4. Extrudr Product Catalogue (DURAPRO PA12 data block) Extrudr · 2025-03 · tds
  5. PolySonic PLA 1.75mm/1kg — product page Polymaker Shop · 2026-08 · vendor
  6. Overture High Speed PLA 1.75mm Overture3D · 2026-08 · vendor
  7. High Speed PLA filament collection Anycubic Official Store · 2026-08 · vendor
  8. Push Plastic product catalogue Push Plastic · 2026-08 · vendor
  9. PLA Meta filament collection Sunlu Official Store · 2026-08 · vendor
  10. QIDI PLA Rapido 1.75mm 1kg 3D Printers Depot · 2026-08 · vendor
  11. Prusament PLA Prusa Pro Green 1kg (NFC) Prusa Research · 2026-08 · vendor
  12. Proto-pasta product catalogue Proto-pasta · 2026-08 · vendor
  13. PolySonic PLA — product page Polymaker · 2026-08 · vendor
  14. Creality PLA filament collection Creality Official Store · 2026-08 · vendor
  15. Polymaker Launches New High-Speed 3D Printing Filament — PolySonic PLA & PLA Pro Polymaker · 2023-11 · doc
  16. PLA Basic — product page Bambu Lab US Store · 2026-08 · vendor
  17. Bambu Filament Technical Data Sheet V3.0 — PLA Basic Bambu Lab · 2026-08 · tds
  18. Flexible (TPE/TPU) — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  19. TPU — material basics Polymaker Wiki · 2026-08 · doc
  20. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  21. PLA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  22. Filament Material Guide Prusa Knowledge Base · 2026-08 · doc
  23. Prusament PLA — material page Prusa Polymers · 2026-08 · doc
  24. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  25. PLA — material guide Prusa Knowledge Base · 2026-08 · doc
  26. Creality Hyper PLA filament review — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  27. Carbon Fiber PLA vs META-PLA vs PLA+ vs PLA by Sunlu — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  28. BambuLab TPU 95A HF vs Qidi TPU 95A HF — results spreadsheet My Tech Fun (Igor Gaspar) · 2024-02 · test
  29. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  30. Characterization of Thermal Expansion Coefficient of 3D Printing Polymeric Materials Using Fiber Bragg Grating Sensors Materials 17(18):4668 · 2024-09 · paper
  31. Prusament PLA Technical Data Sheet v1.0 Prusa Polymers · 2018-09 · tds
  32. Filamentive PLA (recycled) — product page Filamentive · 2026-08 · vendor
  33. 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
  34. Prusament rPLA Corn Pigment 1kg — product page Prusa Research · 2026-08 · vendor
  35. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  36. Elastollan — Chemical properties: swelling and chemical resistance BASF · 2026-08 · tds
  37. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  38. Effect of vapour smoothing in trichloromethane on 3D printed PLA — surface, mechanical and chemical structure Pitale, Keche & Chopra, Engineering Research Express 6(4) 045579 · 2024-12 · paper