3DXTech CarbonX ezPC+CF — Carbon Fiber Reinforced Polycarbonate Filament, 1.75mm, 750g, No Enclosure Required, Hardened Nozzle Required, High Stiffness + High Heat, Made in USA

3DXTech CarbonX ezPC+CF is what you get when the printability of ezPC polycarbonate meets the structural performance of high-modulus carbon fiber. Built on the same easy-to-print ezPC PC base that prints without a heated chamber on open-frame desktop machines, and reinforced with premium high-modulus carbon fiber, CarbonX ezPC+CF delivers a combination that very few materials in FDM printing can match: high thermal resistance, exceptional stiffness, superior dimensional stability, near-isotropic shrinkage, and a surface finish that looks as engineered as the part performs. For structural components that need to hold tight tolerances under thermal and mechanical load — on a printer you already own — this is the material. Manufactured in 3DXTech's 68,000 ft² ISO 9001:2015 certified facility in Grand Rapids, Michigan.

⚠️ Hardened nozzle required — 0.4mm minimum diameter. Carbon fiber is highly abrasive and will destroy a standard brass nozzle rapidly. Use hardened steel, ruby-tipped, or tungsten carbide. Minimum 0.4mm orifice — smaller diameters cause back pressure buildup, jams, and drive gear damage with CF filaments.
⚠️ Minimum layer height: 0.25mm. Do not print below 0.25mm with carbon fiber grades. Layers below this threshold create excessive back pressure in the hotend. Ideal layer height is 60% of nozzle diameter.
⚠️ Dry before printing: 80°C for 4 hours. Polycarbonate is hygroscopic — moisture causes bubbling, stringing, and weak layer adhesion. Dry every spool before its first print session.
✅ No heated chamber required — ezPC+CF's amorphous PC base prints successfully on open-frame printers where standard PC+CF formulations would warp.
✅ 750g spool fits Bambu AMS, Creality CFS, and Anycubic ACE Pro for multi-material setups.

ezPC+CF vs ezPC — What Carbon Fiber Adds

The base ezPC polycarbonate already delivers Tg of 118°C, low warp, and no enclosure requirement. Adding high-modulus carbon fiber reinforcement to that base changes the material's mechanical profile in three meaningful ways. First, stiffness increases significantly — carbon fiber-reinforced parts resist deflection under load far better than unfilled PC, which matters for brackets, mounts, and structural panels that see sustained force. Second, dimensional stability improves — the fiber reinforcement gives the part a very low, near-isotropic coefficient of thermal expansion, meaning the part maintains its dimensions across temperature swings rather than expanding and contracting unevenly. Third, surface finish improves — the fiber fill produces a tight, consistent surface texture that reads as premium and industrial rather than plastic. The tradeoff: carbon fiber is abrasive, requires a hardened nozzle, and limits minimum layer height to 0.25mm.

Property	ezPC (unfilled)	ezPC+CF (this product)
Tg (glass transition)	118°C	Higher — CF reinforcement raises thermal ceiling further
Stiffness / Flexural Modulus	Moderate	Significantly higher — CF dramatically increases rigidity
Dimensional stability (CTE)	Low, near isotropic	Very low, near isotropic — CF reduces thermal expansion further
Surface finish	Smooth PC finish	Tight, consistent CF matte texture
Nozzle requirement	All-metal hotend	All-metal hotend + hardened nozzle ≥ 0.4mm
Enclosure	Not required	Not required
Min layer height	No CF restriction	0.25mm minimum

Amorphous Structure — Why CTE Matters for Engineering Parts

Most engineering filaments are semi-crystalline — they have a melting point and shrink significantly when cooling, which causes warping, dimensional inaccuracy, and anisotropic behavior where the part behaves differently along different axes. ezPC+CF's polycarbonate base is amorphous — it doesn't have a crystalline structure to reorganize during cooling, which gives it near-isotropic shrinkage. Combined with carbon fiber's very low coefficient of thermal expansion, parts printed in ezPC+CF maintain their dimensions across temperature cycling in a way that semi-crystalline materials like nylon, POM, or PBT cannot. For applications where a part must fit precisely into an assembly after printing — or maintain that fit through repeated thermal cycling in service — the amorphous + CF combination is the correct materials choice.

Print Settings

Filament diameter	1.75mm
Hotend temperature	260–280°C (all-metal hotend required)
Bed temperature	80–100°C
Heated chamber	Not required — open-frame compatible
Nozzle	⚠️ Hardened steel, ruby-tip, or tungsten carbide — minimum 0.4mm diameter
Minimum layer height	0.25mm — do not print below this with CF grades
Ideal layer height	60% of nozzle diameter
Drying	80°C for 4 hours — required before printing
AMS / CFS / ACE Pro compatible	Yes — 750g spool fits all three systems
Spool weight	750g
Country of manufacture	USA — Grand Rapids, Michigan
Quality certification	ISO 9001:2015

Who Is This For?

CarbonX ezPC+CF is the correct material for engineers and makers who need the structural performance of carbon fiber reinforced polycarbonate — maximum stiffness, thermal resistance, and dimensional stability — on a desktop printer that doesn't have a heated chamber. The open-frame compatibility of the ezPC base makes this accessible on a much wider range of machines than standard PC+CF formulations. Specific applications: aerospace and UAV structural frames and brackets, automotive interior and underhood components that need dimensional stability through temperature cycling, electronic enclosures where EMI shielding and heat tolerance are both required, industrial tooling and jigs that need to hold tolerance under thermal load, and any engineering prototype where the final production material is an injection-molded PC/CF compound and the prototype needs to replicate that behavior. If you've been using ezPC for its printability and finding it insufficiently rigid for your application — ezPC+CF is the direct upgrade with no change to your printer setup.