3D Printing Info

Filament comparison

PP-GF vs PVA

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

Glass-fibre PP (PP-GF) guidePVA (soluble support) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PP-GF comparisonsMore PVA comparisons
PP-GF vs PVA — documented properties and sources
PropertyGlass-fibre PP (PP-GF)POLYOLEFINPVA (soluble support)SUPPORT
Market snapshot
Listing priceUSD/kg; dated snapshots$49.09/kg median; $46.27–$86.01/kg across 3 dated product listings$65.98/kg median; $42.00–$96.00/kg across 5 dated product listings
Identity & Market
Base polymer / chemistryPolypropylene reinforced with chopped glass fibre[1][2]Polyvinyl alcohol — a water-soluble support polymer[3][4]
Densityg/cm³1.12 (Prusament PP Glass Fiber, ISO 1183) — the glass lifts it above water[1]0.6–0.9 (3DXTech AquaTek, ISO 1183) and 1.13 (Polymaker PolyDissolve S1)[3][4]
Typical priceUSD/kg1 kg-equivalent spools cluster near 49[5][6][7]1 kg-equivalent spools span 42–96; the middle of the market is about 66[8][9][10][11]
Price range across brandsUSD/kg46-86 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[5][6][7]42–96 across brands; IEMAI 3D E-WATER 42, YXPOLYER 55, Reli3D 66 at 500 g, Polymaker PolyDissolve S1 67 at 750 g, 3DXTech AquaTek 96 at 750 g in 1.75 mm[8][9][10][12][11]
Market availability1–5Available from several mainstream brands[5][6][7]Stocked by most mainstream brands[8][9][10][12][11]
Spool sizes & diameters1.75 and 2.85 mm; 700 g, 850 g and 2.2 kg spools[5][6][7]1.75 and 2.85 mm; 0.5 and 0.75 kg spools[8][9]
Typical applicationsStiff, chemically resistant parts where PP-CF's cost or conductivity is unwanted[2]Dissolvable support for PLA, TPU, PVB and PETG — Polymaker names those four for PolyDissolve S1[4]
Diameter tolerance± mm±0.04 (Prusament)[1]Not documented
Printing Parameters
Nozzle temperature°C245 ± 10 (Prusament) — 25 °C below the carbon-fibre grade[1][13]215–225 (Polymaker PolyDissolve S1)[4]
Bed temperature°C95 ± 10 (Prusament)[1]25–60 (Polymaker PolyDissolve S1)[4]
Enclosure / chamber requirement1–5Enclosure recommended — Simplify3D lists an enclosure as a hardware requirement and Polymaker advises one below 70 °C ambient to stop warping and cracking[14][15]Open frame is fine[4]
Part cooling fanOff — Prusa runs 0 % except 100 % on bridges[1]Part cooling fan required (Simplify3D)[16]
Bed surface & adhesion aidNot documentedPEI sheet or painter's tape[16]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s4 at Prusa's 50 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer[1][17]4–12 at Polymaker's 50–150 mm/s on a 0.4 mm nozzle at 0.2 mm layer[4]
Warping tendency1–5High — enclosure needed for reliable large parts; Prusa recommends a brim[1]Not documented
Bed-adhesion difficulty1–5Very difficult — special plates or slurry required[1]Sticks to most surfaces[16]
Stringing / oozing tendency1–5Not documentedModerate — retraction tuning needed[16]
Overall printing difficulty1–5Advanced — enclosure, hardware upgrades, tuning; hardened nozzle mandatory[1]Intermediate — dry filament and a tuned profile; PVA is unusable once it has taken up moisture[18][4]
Extruder requirementPrusa states a hardened nozzle is necessary and recommends a brim[1]A second extruder or a tool changer; PVA is a support material, not a model material[4]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required[1]Brass fine indefinitely[4]
Abrasiveness1–5Highly abrasive — standard GF composite[1]Non-abrasive[4]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[19]Very high — frequent jams without careful setup; wet PVA foams and carbonises in the nozzle[18]
Heat-creep / jam sensitivity1–5Not documentedHigh — all-metal hotend and strong cooling needed; Simplify3D warns PVA clogs if the nozzle is left hot while not extruding[16]
Hotend requirementNot documentedNo special hot-end required, but the nozzle must not be parked hot[16]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Low (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[1][13]Very high (>2 %) — Polymaker measures 10.21 % equilibrium water absorption, by far the highest in the dataset[4]
Equilibrium moisture content at ~50 % RH%0.11 after 24 h and 0.11 after 7 days at 24 °C / 22 % RH (Prusa Polymers)[1]10.21 equilibrium water absorption (Polymaker PolyDissolve S1)[4]
Symptoms when wetNot documentedBubbling and popping at the nozzle, stringing and a rough surface; with PVA this progresses to clogging[18]
Effect of moisture on strengthNot applicable in practice at 0.11 % equilibrium uptake[1]Polymaker groups PVA with nylon as the most moisture-prone class and says it often has to stay in a dryer while printing; there is no published dry-versus-conditioned strength comparison because PVA is not a structural material[18]
Storage requirementNo special storage needed[1]Sealed with desiccant at all times; PVA takes up water faster than any other filament here[18][4]
Mechanical Properties
Tensile strength (XY)MPa46.6 ± 1.3 filament tensile yield (Prusament, ISO 527) — more than double the carbon-fibre grade's 21[1][13]Not documented
Charpy impact, notchedkJ/m²7.9 ± 0.4 printed horizontal and 9.9 ± 0.8 printed vertical XZ (ISO 179-1, notched)[1]Not documented
Brittleness1–5Moderate[1]Not documented
Hardness (scale-specific)Shore A / Shore D / RockwellRockwell R102 (and M95) on extruded unfilled PP stock (ASTM D785); no figure is published for a glass-fibre PP filament[20]Not documented
Creep resistance / sustained load1–5Not documentedPoor — deforms under load at room temperature; PVA is not used structurally[3]
Fatigue / repeated-flex resistance1–5Not documentedPoor — fails after a few cycles[3]
Elasticity / flexibility1–5Rigid[1]Not documented
Wear resistance & frictionNot documented3DXTech marks tensile strength, modulus and elongation as not applicable for its PVA support grade — it is not characterised as a structural material[3]
Thermal Properties
HDT at 0.45 MPa°C138.3 (ISO 75, 0.45 MPa)[1]Not documented
HDT at 1.8 MPa°C112.6 (ISO 75, 1.8 MPa)[1]Not documented
Glass transition (Tg)°CNot documented60 (3DXTech AquaTek, DSC)[3]
Continuous service temperature°CNot documentedBounded by a glass transition of 60 °C[3]
Flammability / UL 94Not documentedFlammable; no UL 94 rating published[3]
Environment & Chemical
UV resistance1–5Not documentedDegrades within weeks outdoors, and dissolves in rain long before UV matters[4]
Chemical resistanceExcellent against acids, alkalis and most solvents[15]Dissolves in water; unusable in any wet or humid service environment[4][16]
Water / humidity resistance in service1–5Excellent — essentially unaffected[1]Dissolves or disintegrates — by design[4][3]
Food contactNot documentedNot offered as a food-contact material[3]
Biodegradability / compostabilityNot documentedPVA is water-soluble and biodegrades in wastewater treatment, but Simplify3D notes disposal should follow local guidance[16]
RecyclabilityNot documentedDissolved PVA goes to drain rather than to recycling[16]
Electrical & ESD propertiesNot documentedSurface resistance above 10^13 ohm/sq (ASTM D257, 3DXTech AquaTek PVA)[3]
Health & Safety
Fume toxicity1–5Low 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[21]Low hazard — minimal VOC and particle emission; none of these materials was in the chamber study[21]
Ventilation / filtration requirement1–5Open a window / occasional ventilation. Inferred — no polyolefin was measured in the chamber study[21]Open a window / occasional ventilation[21]
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[1]Not documented
Post-Processing
Sanding & machiningNot documentedNot sanded — it is dissolved away rather than finished[16]
Gluing & solvent weldingNot documentedNot applicable — PVA is a sacrificial support[16]
Vapour / chemical smoothingNot documentedWater is the solvent; no vapour smoothing is used[4]
Support material pairingNot documentedThis is the support material; Polymaker pairs PolyDissolve S1 with PLA, TPU, PVB and PETG[4]
Solvents & Solubility
Soluble inNone at room temperature; chloroform dissolves the matrix at 60 °C and xylene at about 118 °C, leaving the fibre.[22][23]Water — tap water works cold, warm moving water is faster; 6–12 h typical, changing the water every few hours.[24][25]
Softened or crazed byXylene, decalin, CCl4 and chlorobenzene are heavily absorbed at 20 °C; oleum, chlorosulphonic acid and bromine destroy it.[22]Nothing else: polyvinyl alcohol resists organic solvents, so an IPA or acetone rinse leaves the support intact.[26]
Solvent welding & smoothing agentNone — nothing softens PP at room temperature, so joints have to be welded thermally rather than chemically.[22]None — water dissolves PVA rather than welding it, and no solvent gives it a smoothed surface.[24]

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. Prusament PP Glass Fiber Technical Datasheet v1.0 Prusa Polymers · 2024-11 · tds
  2. Prusament PP Glass Fiber — material page Prusa Polymers · 2026-08 · doc
  3. AquaTek PVA Water Soluble Support Technical Data Sheet v1.0 3DXTech · 2026-08 · tds
  4. PolyDissolve S1 Technical Data Sheet V5.4 Polymaker · 2024-11 · tds
  5. BASF Ultrafuse PP GF30 Black 2.85 mm 2.200 g igo3d · 2026-08 · vendor
  6. BCN3D PP GF30 Black 2.85 mm 700 g igo3d · 2026-08 · vendor
  7. Prusa Prusament PP Glass Fiber Natural (NFC), 1.75 mm / 850 g 3DJAKE · 2026-08 · vendor
  8. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  9. Polymaker product catalogue Polymaker · 2026-08 · vendor
  10. YXPOLYER PVA 1 kg — product page YXPOLYER · 2026-08 · vendor
  11. IEMAI 3D E-WATER water-soluble support filament — store page IEMAI 3D · 2026-08 · vendor
  12. Reli3D PVA Filament 1.75 mm 500 g Natural — Amazon listing Amazon.com · 2026-08 · vendor
  13. Prusament PP Carbon Fiber Technical Datasheet v1.0 Prusa Polymers · 2024-11 · tds
  14. Polypropylene — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  15. PP — material basics Polymaker Wiki · 2026-08 · doc
  16. PVA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  17. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  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. TECAFINE PP natural — stock shape properties Ensinger · 2026-08 · tds
  21. 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
  22. Pro-fax and Moplen polypropylene — Chemical Resistance Guide (20, 60 and 100 °C) LyondellBasell · 2026-08 · tds
  23. US 5,278,282 Polymer recycling by selective dissolution — xylene dissolution temperatures Nauman & Lynch, Rensselaer Polytechnic Institute · 1994-01 · paper
  24. PolyDissolve S1 — Polymaker Wiki Polymaker · 2026-08 · doc
  25. 3DXTech AquaTek PVA product page 3DXTech · 2026-08 · vendor
  26. Polyvinyl alcohol — KURARAY POVAL application guide Kuraray · 2026-08 · tds