3D Printing Info

Filament comparison

PC-CF vs PP-GF

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

Carbon-fibre PC (PC-CF) guideGlass-fibre PP (PP-GF) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PC-CF comparisonsMore PP-GF comparisons
PC-CF vs PP-GF — documented properties and sources
PropertyCarbon-fibre PC (PC-CF)PCGlass-fibre PP (PP-GF)POLYOLEFIN
Market snapshot
Listing priceUSD/kg; dated snapshots$62.58/kg median; $34.99–$117.33/kg across 6 dated product listings$49.09/kg median; $46.27–$86.01/kg across 3 dated product listings
Identity & Market
Base polymer / chemistryPolycarbonate reinforced with chopped carbon fibre[1][2]Polypropylene reinforced with chopped glass fibre[3][4]
Densityg/cm³1.22 (Prusament) and 1.36 (3DXTech), ISO 1183[1][2]1.12 (Prusament PP Glass Fiber, ISO 1183) — the glass lifts it above water[3]
Typical priceUSD/kg1 kg-equivalent spools span 35–117; the middle of the market is about 63[5][6][7][8][9]1 kg-equivalent spools cluster near 49[10][11][12]
Price range across brandsUSD/kg35–117 across brands; Ambrosia 35, IEMAI 39, YXPOLYER 55, Spectrum PC CF 70, Prusament 94, 3DXTech 117[5][6][7][8][9]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[10][11][12]
Market availability1–5Available from several mainstream brands[5][7][13]Available from several mainstream brands[10][11][12]
Spool sizes & diameters1.75 and 2.85 mm; 0.75, 0.8 and 1 kg spools[5][7]1.75 and 2.85 mm; 700 g, 850 g and 2.2 kg spools[10][11][12]
Typical applicationsStiff high-temperature structural parts — jigs, drone frames and under-bonnet brackets[1][2]Stiff, chemically resistant parts where PP-CF's cost or conductivity is unwanted[4]
Diameter tolerance± mm±0.04 (Prusament PC Blend Carbon Fiber)[1]±0.04 (Prusament)[3]
Printing Parameters
Nozzle temperature°C285 ± 10 (Prusament)[1]245 ± 10 (Prusament) — 25 °C below the carbon-fibre grade[3][14]
Bed temperature°C110 ± 10 (Prusament)[1]95 ± 10 (Prusament)[3]
Enclosure / chamber requirement1–5Enclosure required (passive)[1][15]Enclosure recommended — Simplify3D lists an enclosure as a hardware requirement and Polymaker advises one below 70 °C ambient to stop warping and cracking[16][17]
Part cooling fanOff — Prusa allows 0–20 % and warns cooling significantly reduces interlayer adhesion[1]Off — Prusa runs 0 % except 100 % on bridges[3]
Bed surface & adhesion aidPEI with a glue stick or a commercial adhesive[18]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[3][19]
Warping tendency1–5High — enclosure needed for reliable large parts; the fibre reduces warping against unfilled PC[1][15]High — enclosure needed for reliable large parts; Prusa recommends a brim[3]
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[18][20]Very difficult — special plates or slurry required[3]
Stringing / oozing tendency1–5Moderate — retraction tuning needed; Polymaker flags stringing as a common PC problem[20]Not documented
Overall printing difficulty1–5Advanced — enclosure, hardware upgrades, tuning; hardened nozzle mandatory[15][1]Advanced — enclosure, hardware upgrades, tuning; hardened nozzle mandatory[3]
Extruder requirementNot documentedPrusa states a hardened nozzle is necessary and recommends a brim[3]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required[15]Hardened steel required[3]
Abrasiveness1–5Highly abrasive — standard CF composite[15]Highly abrasive — standard GF composite[3]
Nozzle clog risk1–5High — jams from moisture, heat creep or particles; PC already absorbs water from the air and 3DXTech adds a hardened 0.4 mm minimum nozzle, 0.25 mm layers and a 120 °C pre-dry[21][18][22]Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[22]
Heat-creep / jam sensitivity1–5Slightly sensitive[18]Not documented
Hotend requirementAll-metal hot end required (Simplify3D)[18]Not documented
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Low (0.1–0.3 %) — the PC matrix takes up 0.15–0.25 % and 3DXTech specifies a 120 °C, 4 h pre-dry[23][24][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[3][14]
Equilibrium moisture content at ~50 % RH%0.11 after 7 days at 24 °C / 22 % RH (Prusa Polymers)[1]0.11 after 24 h and 0.11 after 7 days at 24 °C / 22 % RH (Prusa Polymers)[3]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[25]Not documented
Effect of moisture on strengthNo dry-versus-conditioned figures are published. Polymaker calls PC highly hygroscopic and requires a 70–80 °C dry for 6–8 h; run wet, the loss shows as surface defects and poor layer adhesion[20][25]Not applicable in practice at 0.11 % equilibrium uptake[3]
Storage requirementAirtight containers with desiccant to prevent reabsorption[20]No special storage needed[3]
Mechanical Properties
Tensile strength (XY)MPa64 ± 3 printed horizontal and 70 ± 3 printed vertical at yield, ISO 527-1 (Prusament); 3DXTech quotes 73 at break[1][2]46.6 ± 1.3 filament tensile yield (Prusament, ISO 527) — more than double the carbon-fibre grade's 21[3][14]
Young's modulusMPa2600 printed horizontal and 3200 printed vertical, ISO 527-1 (Prusament); 3DXTech quotes 6980[1][2]Not documented
Elongation at break%4.6 at yield printed horizontal (Prusament); 3DXTech quotes 2.1 at break[1][2]Not documented
Flexural strengthMPa94 ± 3 printed horizontal and 130 ± 2 printed vertical, ISO 178 (Prusament); 3DXTech quotes 85[1][2]Not documented
Flexural modulusMPa3500 printed horizontal and 4200 printed vertical, ISO 178 (Prusament); 3DXTech quotes 6540[1][2]Not documented
Charpy impact, notchedkJ/m²12 ± 1 printed horizontal and 17 ± 2 printed vertical, ISO 179-1 notched (Prusament)[1]7.9 ± 0.4 printed horizontal and 9.9 ± 0.8 printed vertical XZ (ISO 179-1, notched)[3]
Other impact dataCharpy unnotched 32 ± 5 printed horizontal and 35 ± 4 printed vertical (Prusament, ISO 179-1)[1]Not documented
Layer adhesion / Z tensileMPa23 ± 2 (Prusa Polymers interlayer adhesion test) — above the 21 ± 2 of unfilled Prusament PC Blend[1][24]Not documented
Brittleness1–5Moderate[1][2]Moderate[3]
Hardness (scale-specific)Shore A / Shore D / Rockwell83 Shore D (Prusa Polymers method), against 79 for unfilled Prusament PC Blend[1][24]Rockwell R102 (and M95) on extruded unfilled PP stock (ASTM D785); no figure is published for a glass-fibre PP filament[26]
Creep resistance / sustained load1–5Excellent — holds load for years. Room-temperature tensile creep of moulded unfilled PC ran unbroken at 41 MPa until the test was stopped; short carbon fibre raises the flexural modulus from about 2.1 to 3.5-6.5 GPa, which reduces creep strain further[27][1]Not documented
Fatigue / repeated-flex resistance1–5Good. No fatigue test data was found for a carbon-fibre PC filament; the unfilled polymer is rated Good on the same scale[27]Not documented
Elasticity / flexibility1–5Rigid[1]Rigid[3]
Thermal Properties
HDT at 0.45 MPa°C114 (ISO 75, 0.45 MPa, Prusament)[1]138.3 (ISO 75, 0.45 MPa)[3]
HDT at 1.8 MPa°C106 (ISO 75, 1.8 MPa, Prusament), against 93 for unfilled Prusament PC Blend[1][24]112.6 (ISO 75, 1.8 MPa)[3]
Glass transition (Tg)°C127 (3DXTech, DSC)[2]Not documented
Continuous service temperature°C113 — Prusa publishes this as the temperature resistance of Prusament PC Blend[24]Not documented
Environment & Chemical
UV resistance1–5Degrades within weeks outdoors unless stabilised[20]Not documented
Chemical resistanceWithstands oils, solvents and fuels; Polymaker rates it good against weak acids[20]Excellent against acids, alkalis and most solvents[17]
Water / humidity resistance in service1–5Not documentedExcellent — essentially unaffected[3]
Food contactBisphenol-A polycarbonate is not offered as food-contact filament[20]Not documented
Biodegradability / compostabilityNot biodegradable[20]Not documented
RecyclabilityMechanically recyclable but not accepted in household plastic collection[20]Not documented
Electrical & ESD propertiesSurface resistance above 10⁹ ohm/sq — not static-dissipative (3DXTech, ASTM D257)[2]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[28]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[28]
Ultrafine-particle emission rateparticles/min≈4 × 10¹⁰ median — the highest ultrafine-particle rate of the nine filaments in the chamber study, above every ABS tested[28]Not documented
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[28][15]Open a window / occasional ventilation. Inferred — no polyolefin was measured in the chamber study[28]
Dust & fibre handling hazardCarbon fibre is bound in the matrix; sanding dust should not be inhaled[2]Glass fibre is bound in the matrix; avoid inhaling sanding dust[3]
Post-Processing
Sanding & machiningSands and machines well; the toughness means it cuts rather than chips[18]Not documented
Gluing & solvent weldingCyanoacrylate; dichloromethane solvent-welds PC but is a laboratory reagent[18]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[18]Not documented
Support material pairingPrints its own supports; 3DXTech sells a dedicated PC break-away support[18]Not documented
Solvents & Solubility
Soluble inDichloromethane and chloroform dissolve the matrix and leave the fibre; DMF and dioxane do the same (Covestro).[29]None at room temperature; chloroform dissolves the matrix at 60 °C and xylene at about 118 °C, leaving the fibre.[30][31]
Softened or crazed byMethanol, butyl acetate, ether, 1 % NaOH and phthalate plasticisers stress-crack it; acetone, MEK and xylene swell it.[29]Xylene, decalin, CCl4 and chlorobenzene are heavily absorbed at 20 °C; oleum, chlorosulphonic acid and bromine destroy it.[30]
Solvent welding & smoothing agentDichloromethane cement welds the resin, but the fibre keeps the joint from flowing closed. Controlled carcinogen.[32]None — nothing softens PP at room temperature, so joints have to be welded thermally rather than chemically.[30]

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 PC Blend Carbon Fiber Technical Datasheet v2.0 Prusa Polymers · 2023-04 · tds
  2. CarbonX Carbon Fiber ezPC Polycarbonate Technical Data Sheet 3DXTech · 2026-08 · tds
  3. Prusament PP Glass Fiber Technical Datasheet v1.0 Prusa Polymers · 2024-11 · tds
  4. Prusament PP Glass Fiber — material page Prusa Polymers · 2026-08 · doc
  5. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  6. Spectrum PC CF Carbon Black, 1.75 mm / 250 g 3DJAKE · 2026-08 · vendor
  7. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  8. IEMAI CF-PC 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  9. YXPOLYER PC CF product page YXPOLYER · 2026-08 · vendor
  10. BASF Ultrafuse PP GF30 Black 2.85 mm 2.200 g igo3d · 2026-08 · vendor
  11. BCN3D PP GF30 Black 2.85 mm 700 g igo3d · 2026-08 · vendor
  12. Prusa Prusament PP Glass Fiber Natural (NFC), 1.75 mm / 850 g 3DJAKE · 2026-08 · vendor
  13. Filastruder product catalogue Filastruder · 2026-08 · vendor
  14. Prusament PP Carbon Fiber Technical Datasheet v1.0 Prusa Polymers · 2024-11 · tds
  15. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  16. Polypropylene — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  17. PP — material basics Polymaker Wiki · 2026-08 · doc
  18. Polycarbonate — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  19. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  20. PC — material basics Polymaker Wiki · 2026-08 · doc
  21. CARBONX ezPC+CF — product page (print recommendations) 3DXTech · 2026-08 · doc
  22. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  23. Bambu Filament Technical Data Sheet V2.0 — PC Bambu Lab · 2026-08 · tds
  24. Prusament PC Blend Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  25. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  26. TECAFINE PP natural — stock shape properties Ensinger · 2026-08 · tds
  27. Experimental data for creep and dynamic mechanical properties of polycarbonate and polycarbonate/ABS Data in Brief 42:108264 · 2022-06 · paper
  28. 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
  29. Makrolon — The chemical resistance (Makrolon 2800, 6 days at 23 °C and 50 °C) Covestro · 2016-12 · tds
  30. Pro-fax and Moplen polypropylene — Chemical Resistance Guide (20, 60 and 100 °C) LyondellBasell · 2026-08 · tds
  31. US 5,278,282 Polymer recycling by selective dissolution — xylene dissolution temperatures Nauman & Lynch, Rensselaer Polytechnic Institute · 1994-01 · paper
  32. Weld-On 3 Acrylic Plastic Cement — technical data sheet (shipped as dichloromethane) IPS Corporation · 2002-07 · tds