eSUN PA12+CF Filament

eSUN PA12+CF is an engineering PA12 nylon-based filament reinforced with carbon fiber for FDM/FFF 3D printing of strong, stable, wear-resistant and functional parts. The material is also known as ePA12-CF and PA12-CF, so all three names refer to the same eSUN product line.

PA12+CF is designed for users who need a more stable and moisture-resistant nylon composite compared with standard PA/nylon materials. Thanks to the PA12 base, the material offers low moisture absorption, high dimensional stability and good resistance to humidity and temperature influence. Carbon fiber reinforcement improves rigidity, strength, wear resistance and gives printed parts a matte carbon-fiber surface.

The material is suitable for engineering parts, robots, drones, automotive components, precision mechanical elements, housings, brackets, gears, industrial fixtures, equipment parts, textile mechanisms, aerospace prototypes and functional products where stability, low moisture absorption, chemical resistance and reliable performance are important.

What is eSUN PA12+CF

PA12+CF is PA12 nylon reinforced with carbon fiber. Unlike standard PA-CF based on PA6/PA66, PA12+CF is more focused on dimensional stability and low moisture absorption. This is especially important for parts that need to maintain shape in changing humidity, during long-term operation and in technical assemblies.

According to eSUN’s positioning, the material features low moisture absorption, high strength, high toughness, high rigidity, high impact resistance, chemical resistance, heat resistance, abrasion resistance, high dimensional stability, matte surface, antistatic behavior, excellent printability and fast printing capability.

✅ Key advantages of eSUN PA12+CF

• PA12 base: a more stable and moisture-resistant nylon base compared with standard polyamide materials.
• Carbon fiber reinforcement: improves part rigidity, strength and dimensional stability.
• Low moisture absorption: printed parts are less affected by ambient humidity and temperature.
• High toughness: suitable for functional parts that need load resistance.
• Impact resistance: useful for robot parts, drones, equipment and technical mechanisms.
• Chemical resistance: suitable for engineering applications where resistance to the operating environment matters.
• Wear resistance: can be used for gears, guides, sliding and working components.
• Heat resistance: HDT reaches 131.9 ℃ at 0.45 MPa.
• Matte carbon-fiber surface: printed parts look clean, technical and professional.
• Antistatic behavior: useful for technical housings, electronics and industrial parts.

Color and appearance

eSUN PA12+CF is available in black. This is a classic engineering shade for carbon-fiber-reinforced nylon composites. Printed parts have a matte, technical and slightly textured surface. Layer lines are less visible than on glossy plastics, and parts look professional even without additional finishing.

📐 Technical specifications

📊 Physical and mechanical properties

For FDM printing, it is important to remember that part properties depend on model orientation, layer direction, temperature, drying, infill and layer adhesion quality. The values below are practical for product cards and category descriptions.

TDS reference values

The PA12+CF technical data sheet also provides typical values measured on test samples. For product cards, the XY/Z table above is more useful, but TDS reference data is helpful for technical comparison.

Heat resistance and stability

PA12+CF has a heat deflection temperature of 131.9 ℃ at 0.45 MPa. This makes the material suitable for parts that need to maintain shape at elevated temperatures. The product positioning also mentions long-term use up to 120 ℃ and short-term use up to 160 ℃, but for technical tables it is better to use HDT 131.9 ℃ as the main measured value.

The real heat resistance of a printed part depends on geometry, layer orientation, wall thickness, infill percentage, layer adhesion and load conditions. For critical parts, testing the model in real operating conditions is recommended.

Low moisture absorption

The key practical difference between PA12+CF and many other nylon materials is low moisture absorption. PA12+CF parts are less likely to change dimensions under humidity and temperature influence, which is important for precision engineering components, housings, fitting surfaces, mechanical assemblies, robots and drones.

However, PA12+CF is still a nylon material, so humidity control is required before printing and during long-term storage. After opening the spool, it is recommended to store the material in a sealed container with desiccant and print from a dry box or eBOX.

⚙️ Recommended Printing Parameters

eSUN PA12+CF printing recommendations

• Dry the filament at 70 ℃ for more than 12 hours before printing, especially after opening the spool or if print quality decreases.
• During printing, use a dry box, eBOX or sealed filament container.
• After fresh vacuum unpacking, the material may print more consistently, but drying is still recommended for reliable results.
• Use a hardened steel, ruby, tungsten carbide or another wear-resistant nozzle.
• The material is abrasive, so a standard brass nozzle wears quickly.
• For long print jobs, a 0.6 mm or larger nozzle is preferable to reduce clogging risk.
• If possible, use hardened steel extruder gears.
• Keep the filament path as straight as possible: PA12+CF is rigid and does not tolerate sharp bends well.
• For strong parts, start at 40–80 mm/s and increase speed after profile tuning.
• For large parts, use an enclosure or stable temperature around the model.
• Use a brim or skirt to improve bed adhesion.
• If Z-hop leaves marks on the surface, disable Z-axis lift / Z-hop and optimize travel moves.
• Enable Z seam alignment and choose the seam position for a cleaner appearance.

Best applications for eSUN PA12+CF

• 🤖 Robots, robotic housings and mounts.
• 🚁 Drones, UAV components and lightweight rigid parts.
• 🚗 Automotive elements, mounts and functional prototypes.
• ✈️ Aerospace prototypes and technical components.
• ⚙️ Gears, toothed wheels and mechanical elements.
• 🏭 Industrial jigs, fixtures and tool fixtures.
• 🔌 Electrical and electronic housings, panels, holders and protective elements.
• 🧪 Precision engineering prototypes requiring dimensional stability.
• 🧵 Textile mechanism parts and pump elements.
• ⚫ Black matte technical parts with carbon-fiber texture.

PA12+CF vs PA-CF vs PET-CF vs PETG-CF

3D printer compatibility

eSUN PA12+CF is compatible with FDM/FFF 3D printers using 1.75 mm filament, supporting a 250–290 ℃ nozzle temperature range and a 60–100 ℃ heated bed. Stable printing requires a high-temperature hotend, dry filament, a wear-resistant nozzle and a properly tuned profile.

The material can be printed on Bambu Lab, Creality, Prusa, Anycubic, QIDI, Flashforge, Raise3D, Voron and other FDM/FFF printers if the printer supports high-temperature printing, stable feeding of rigid composite filament and work with abrasive materials.

For hotends with PTFE tubing, check the maximum allowed temperature. For long PA12+CF printing, an all-metal hotend is recommended. It is also important to avoid sharp bends in the feeding path because the material is rigid and not as flexible as standard nylon or TPU.

Why a wear-resistant nozzle is needed

PA12+CF contains carbon fiber, and according to MSDS it also contains glass fiber. Therefore, the material is abrasive and quickly wears standard brass nozzles. When the nozzle wears, dimensional accuracy becomes worse, line width changes, extrusion becomes unstable and surface quality decreases.

For PA12+CF, hardened steel, ruby, tungsten carbide or another wear-resistant nozzle is recommended. A 0.4 mm nozzle can be used for small parts, but for long print jobs, stable feeding and reduced clogging risk, 0.6 mm is often better.

Drying and storage

Despite lower moisture absorption compared with many other nylons, PA12+CF should be stored dry and preferably printed from a dry box. Wet material can cause bubbles, popping, unstable extrusion, rough surface and reduced part strength.

• Dry PA12+CF at 70 ℃ for more than 12 hours before printing.
• Use a dry box or eBOX during printing.
• After printing, return the spool to a sealed bag or container immediately.
• Store the material with silica gel or another desiccant.
• Do not leave the spool open in a humid room.
• If surface quality decreases, dry the material again.

Design notes for PA12+CF parts

To obtain strong and stable PA12+CF parts, the model should be designed for FDM printing. Final properties depend not only on the material, but also on model shape, layer direction and load distribution.

• Increase the number of walls for loaded parts.
• Avoid thin walls in high-load areas.
• Orient the model so the main load does not split layers along Z.
• Use fillets instead of sharp internal corners.
• For fitting holes, consider possible post-processing.
• For gears and sliding parts, test clearances on the actual printer and profile.
• For robot and drone parts, test vibration and impact resistance.

Post-processing and safety

PA12+CF can be drilled, sanded, fitted and mechanically processed, but protection is required. Dust from carbon-fiber and glass-fiber-filled materials should not be inhaled. During post-processing, safety glasses, a mask or respirator and ventilation are recommended.

During printing and storage, avoid open flames, sparks, overheating and contact with incompatible materials. Print in a ventilated area and do not inhale smoke, dust or overheating products.

📄 File Download: technical files and certificates

• PA12+CF Parameters for Bambu Lab & Creality — starting profiles and printing parameters.
• TDS — technical data sheet.
• MSDS/SDS — material safety data sheet.
• REACH — SVHC report.
• RoHS — restricted substances report.

FAQ

Why buy eSUN PA12+CF

eSUN PA12+CF is a strong choice for users who need engineering PA12 nylon with carbon fiber, low moisture absorption, stable geometry and a matte carbon-fiber surface. The material is suitable for robots, drones, automotive parts, industrial fixtures, electronics, precision housings, gears and functional components.

If standard PA-CF is too moisture-sensitive, PETG-CF is not engineering enough, and PET-CF does not match the required mechanical behavior, PA12+CF becomes a practical option for stable, strong and precise technical parts.