3D Printing Info

Filament comparison

ASA-GF vs PPA

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

Glass-fibre ASA (ASA-GF) guidePPA (polyphthalamide) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore ASA-GF comparisonsMore PPA comparisons
ASA-GF vs PPA — documented properties and sources
PropertyGlass-fibre ASA (ASA-GF)ASAPPA (polyphthalamide)PA
Market snapshot
Listing priceUSD/kg; dated snapshots$29.95/kg median; $26.99–$33.99/kg across 3 dated product listings$45.49/kg median; $45.49–$45.49/kg across 1 dated product listings
Identity & Market
Base polymer / chemistryASA reinforced with chopped glass fibre — 10 wt% (Spectrum ASA-X GF10), 15 wt% (ZYLtech ASA-GF)[1][2]Polyphthalamide — a semi-aromatic polyamide in which aromatic diacid units replace part of the aliphatic backbone; Raise3D and Bambu Lab both label it high-temperature nylon[3][4]
Densityg/cm³1.07 (ZYLtech) and 1.11 (Spectrum), ISO 1183[1][2]1.21 (ISO 1183, Siraya Tech Fibreheart PPA)[5]
Typical priceUSD/kg1 kg spools cluster near 28[6][7]One 1 kg listing on the market, at 45[8]
Price range across brandsUSD/kg27–34 across brands; Ambrosia 27, ZYLtech 30, Siraya Tech 34[6][7][9]45 for the only unfilled PPA filament found — Siraya Tech Fibreheart PPA at 1 kg; every other PPA in retail is carbon- or glass-filled[8]
Market availability1–5Niche, a handful of specialist brands[6][1][2]Special order, 1–2 makers worldwide — Siraya Tech is the only brand found selling unfilled PPA filament[8]
Spool sizes & diameters1.75 and 2.85 mm; 1 kg spools[2][6]1.75 mm, 1 kg[8]
Typical applicationsOutdoor brackets and mounts that need stiffness and dimensional stability under sun and moisture[1][2]Gears, bearings and tooling that must hold load above the reach of PA6 or PA12, and parts exposed to fuels and industrial chemicals[5]
Diameter tolerance± mm±0.01 at 95 % probability and ±0.02 at 100 % (ZYLtech)[2]Not documented
Printing Parameters
Nozzle temperature°C240–270 (Spectrum); 240–280 (ZYLtech)[1][2]280–300 (Siraya Tech)[5]
Bed temperature°C80–100 (Spectrum); 90–110 on PEI (ZYLtech)[1][2]70–80 (Siraya Tech)[5]
Enclosure / chamber requirement1–5Enclosure recommended[10]Enclosure recommended — Siraya Tech advises an enclosure to hold temperature and limit warping on larger prints[5]
Part cooling fan0–20 % (Spectrum)[1]20–60 % (Siraya Tech)[5]
Bed surface & adhesion aidPEI sheet, BuildTak or an adhesion aid such as Magigoo (Polymaker); Simplify3D also lists Kapton tape and ASA slurry[11][12]PEI sheet with a glue stick, or a PVP glue coating[5]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s2.4–5.6 at Spectrum's 30–70 mm/s on a 0.4 mm nozzle at 0.2 mm layer; ZYLtech allows up to 200 mm/s[1][2][13]Not documented
Warping tendency1–5Moderate — needs adhesion aid or draught shield[10]Not documented
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[11]Not documented
Stringing / oozing tendency1–5Slight — Polymaker advises 1–2 mm retraction at 20–30 mm/s[11]Not documented
Overall printing difficulty1–5Intermediate — dry filament and a tuned profile; ZYLtech requires a hardened nozzle of 0.6 mm or larger[2][1]Advanced — enclosure, hardware upgrades, tuning; needs a 300 °C-class hot end and a dry spool[5]
Extruder requirementZYLtech specifies a hardened nozzle 0.6 mm or larger; Spectrum bases its settings on a 0.5 mm nozzle[2][1]Not documented
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — Spectrum recommends ruby or hardened, ZYLtech requires hardened[1][2]Brass fine indefinitely — Siraya Tech states a hardened steel nozzle is not needed for the unfilled grade[5]
Abrasiveness1–5Highly abrasive — standard GF composite[1][2]Non-abrasive when unfilled[5]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[14]Moderate — needs dry filament and a clean nozzle; Siraya Tech tells users to dry only when moisture symptoms appear, rather than before every print[5]
Heat-creep / jam sensitivity1–5Slightly sensitive[12]Not documented
Hotend requirementNo special hotend required[12]High-quality metal nozzle, 0.4–1.0 mm; hardened steel not required (Siraya Tech)[5]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate — the ASA matrix takes up 0.40–0.45 % saturated at 25 °C / 55 % RH; no glass-filled grade publishes its own figure[15][16][17]High (0.8–2 %) — Siraya Tech publishes 2.59 % by ISO 62 immersion for the unfilled grade; on the equilibrium basis Bambu Lab uses, its 15 % carbon-filled PPA reaches 1.30 % against 2.35 % for the same maker's PA6-CF[5][4][18]
Equilibrium moisture content at ~50 % RH%Not documented2.59 by ISO 62 water immersion (Siraya Tech, unfilled) — an immersion figure, not the 25 °C / 55 % RH equilibrium basis the filled grades are quoted on, so the two are not directly comparable[5]
Drying temperature & timeNot documented80–100 °C for 4–6 h (Siraya Tech)[5]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[19]Oozing, bubbles and a rough surface finish (Siraya Tech)[5]
Effect of moisture on strengthNo dry-versus-conditioned figures are published; Polymaker groups the styrenics as moderate-sensitivity and absorbed water shows as bubbling and poor layer adhesion[19]Siraya Tech publishes dry against saturated for the same grade: tensile 70 → 60 MPa, flexural 114 → 87 MPa, HDT at 1.8 MPa 73.5 → 48.5 °C, while Charpy rises 10 → 14.5 kJ/m²[5][8]
Storage requirementSealed with desiccant; Polymaker rates the styrenics moderate-sensitivity[19]Dry box below 15 % RH (Siraya Tech)[5]
Mechanical Properties
Tensile strength (XY)MPa33–36 at break, ISO 527 (ZYLtech; specimen type not stated); Spectrum quotes 55 at break on injection-moulded specimens[2][1]72 at break (printed, ASTM D638, Siraya Tech); the product page quotes 70 dry and 60 saturated[5][8]
Young's modulusMPa2540–2890 (ZYLtech; specimen type not stated) and 2550 (Spectrum, injection-moulded), ISO 527[2][1]3600 (printed, ASTM D638, Siraya Tech)[5]
Elongation at break%3.4 at break (ZYLtech; specimen type not stated); Spectrum quotes 2.80 at yield on injection-moulded specimens[2][1]10.5 at break (printed, ASTM D638, Siraya Tech)[5]
Flexural strengthMPaNot documented115 (printed, ISO 178, Siraya Tech); 114 dry against 87 saturated on the product page[5][8]
Flexural modulusMPa2130–2480 flexural modulus, ISO 178 (ZYLtech; specimen type not stated)[2]3350 (printed, ISO 178, Siraya Tech)[5]
Charpy impact, notchedkJ/m²8.3 notched Charpy at 23 °C on injection-moulded specimens (Spectrum, ISO 179-1eA); ZYLtech publishes notched Izod 6.9 by ISO 180 instead[1][2]10.1 Charpy (printed, ISO 179, Siraya Tech); the data sheet does not state whether the specimen was notched[5]
Other impact dataCharpy unnotched 25 kJ/m² at 23 °C on injection-moulded specimens (Spectrum, ISO 179-1eU); ZYLtech notched Izod 6.9 kJ/m² (ISO 180)[1][2]Not documented
Brittleness1–5Brittle — snaps with little warning; elongation at break 3.4 %[2]Moderate — 10.5 % elongation at break puts it between PA6 and the fibre-filled grades[5]
Creep resistance / sustained load1–5Good — no creep test found; chopped glass fibre lifts modulus to 2540–2890 against 2379–2450 for unfilled ASA[2][16][15]Good — Raise3D cites high creep resistance as a reason to choose the PPA matrix over other nylons[3]
Fatigue / repeated-flex resistance1–5Below average — no GF-grade S-N curve; elongation at break falls to 3.4 % against 6.7–9.2 % for unfilled ASA[2][16][15]Not documented
Elasticity / flexibility1–5Rigid[2]Rigid — 3.6 GPa tensile modulus[5]
Wear resistance & frictionNot documentedSiraya Tech describes the unfilled grade as low-friction and self-lubricating, aimed at gears and bearings[5][8]
Thermal Properties
HDT at 0.45 MPa°C100 (Spectrum, injection-moulded, ISO 75 at 0.45 MPa)[1]81 dry and 61 saturated (printed, ISO 75 Method B at 0.45 MPa, Siraya Tech)[5]
HDT at 1.8 MPa°C97–99 unannealed (ZYLtech, ISO 75 at 1.8 MPa; specimen type not stated); Spectrum 90 on injection-moulded specimens[2][1]73.5 dry and 48.5 saturated (printed, ISO 75 Method A at 1.8 MPa, Siraya Tech) — unfilled PPA deflects near its Tg; the 190–227 °C figures quoted for PPA are carbon-filled grades[5][4]
Glass transition (Tg)°CNot documented80 (ASTM D3418, Siraya Tech)[5]
Melting point / Vicat°CAmorphous ASA matrix; Vicat 98 (Spectrum, ISO 306). ZYLtech quotes a 210–220 °C melting range by ISO 11357 for its grade[1][2]231 melting point (ASTM D3418) and 230 Vicat (ISO 306), Siraya Tech[5]
Continuous service temperature°C93 — Prusa publishes this as the temperature resistance of Prusament ASA[20]Not documented
Annealing responseNot documentedSiraya Tech's product page offers annealing for strength while its own data sheet says annealing is not recommended because the print can warp; on its 15 % carbon-filled PPA, annealing lifts HDT at 1.8 MPa from 82.5 to 119 °C[5][8][21]
Flammability / UL 94Flammable; no UL 94 rating published[15]Not documented
Environment & Chemical
UV resistance1–5Excellent — designed for permanent outdoor use; Spectrum states the parts resist prolonged UV and moisture exposure[1][22]Not documented
Chemical resistanceGood against weak acids, weak alkalis, oils and grease; dissolved by acetone[16]Withstands fuels, oils and industrial chemicals; Bambu Lab rates semi-aromatic nylon better than general nylon against weak acids, weak alkalis and most organic solvents[5][4]
Water / humidity resistance in service1–5Not documentedAbsorbs water, properties shift — a saturated specimen loses about 15 % of its tensile strength and 25 °C of heat-deflection temperature[5][8]
Food contactNot food safe[11]Not documented
Biodegradability / compostabilityNot biodegradable[11]Not documented
RecyclabilityNot accepted in household plastic collection[11]Not documented
Health & Safety
Fume toxicity1–5High — hazardous VOC such as styrene; enclosure and filtration needed[23][10]Not documented
Hazardous species emittedStyrene. Bambu Lab states ABS and ASA release harmful gases such as styrene at printing temperature, which can be toxic and cause dizziness or nausea. Azimi et al. measured styrene from every styrenic filament tested but did not test ASA itself[10][23]Not documented
Ventilation / filtration requirement1–5Enclosure with carbon and HEPA filtration[23][10]Not documented
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[1]Not documented
Post-Processing
Sanding & machiningSands well and takes filler before painting[11]Not documented
Painting & finishingPaints readily; ASA holds colour outdoors so many parts are left unpainted[11]Not documented
Gluing & solvent weldingSolvent-welds with acetone[16]Not documented
Vapour / chemical smoothingAcetone vapour smoothing works[16]Not documented
Support material pairingHIPS breaks away or dissolves in d-limonene; Bambu Lab sells a Support for ABS that also serves ASA[10]Compatible with quick-release support materials (Siraya Tech)[5]
Solvents & Solubility
Soluble inAcetone dissolves the resin and leaves the fibre; MEK, THF, ethyl acetate and chlorinated solvents attack the styrenic backbone.[24][16]Dissolved at 23 °C by formic acid, phenol, m-cresol, 96 % sulphuric acid or hexafluoroisopropanol — all laboratory reagents.[25]
Softened or crazed byLimonene attacks some grades — Prusa reports Prusament ASA Orange flaking apart as layer adhesion fails.[26]Mineral acids, oxidants, halogens and zinc chloride solutions attack the amide bond; ordinary solvents do not.[25]
Solvent welding & smoothing agentAcetone vapour reaches only the resin fraction, so the fibre is left standing proud of the smoothed surface.[27][16]None — nylon's only solvents are formic acid, phenol and HFIP, all of which degrade the part they wet.[25]

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. Spectrum ASA-X GF10 Technical Data Sheet (mechanical and thermal data marked injection-moulded) Spectrum Filaments · 2026-08 · tds
  2. ZYLtech ASA-GF Filament Technical Data Sheet v1 ZYLtech · 2026-08 · tds
  3. Raise3D Industrial PPA CF Technical Data Sheet V2.0 Raise3D · 2022-04 · tds
  4. Bambu Filament Technical Data Sheet V1.0 — PPA-CF Bambu Lab · 2026-08 · tds
  5. Siraya Tech Fibreheart PPA Technical Data Sheet Siraya Tech · 2026-08 · tds
  6. Filastruder product catalogue Filastruder · 2026-08 · vendor
  7. ZYLtech ASA-GF Glass Fiber filament — product page ZYLtech · 2026-08 · vendor
  8. Siraya Tech Fibreheart PPA Filament — product page Siraya Tech · 2026-08 · vendor
  9. Siraya Tech Fibreheart ASA-GF Filament product page Siraya Tech · 2026-08 · vendor
  10. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  11. ASA — material basics Polymaker Wiki · 2026-08 · doc
  12. ASA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  13. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  14. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  15. Bambu Filament Technical Data Sheet V3.0 — ASA Bambu Lab · 2026-08 · tds
  16. PolyLite ASA Technical Data Sheet Polymaker · 2024-11 · tds
  17. Prusament ASA Technical Datasheet v1.1 Prusa Polymers · 2024-05 · tds
  18. Bambu Filament Technical Data Sheet V3.0 — PA6-CF Bambu Lab · 2026-08 · tds
  19. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  20. Prusament ASA — material page Prusa Polymers · 2026-08 · doc
  21. Siraya Tech Fibreheart PPA-CF Technical Data Sheet Siraya Tech · 2026-08 · tds
  22. ASA — FDM Material Data Sheet (includes 1000 h QUV exposure results) Stratasys · 2026-08 · tds
  23. 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
  24. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  25. Ultramid Nylon Chemical Resistance guide (unmodified PA6 B27E and PA66 A27E) BASF · 2026-08 · tds
  26. HIPS — Knowledge Base Prusa Research · 2026-08 · doc
  27. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc