eSUN PA Black Nylon Filament 1 kg

eSUN PA Black is a black engineering nylon filament based on PA / ePA for FDM/FFF 3D printing of strong, impact-resistant, wear-resistant and functional parts. The material is based on nylon 6/66 copolymer and is suitable for mechanical components, gears, mounts, housings, automotive parts, electronics, aerospace prototypes and durable parts.

The black color makes eSUN PA Black a practical choice for technical housings, mechanics, automotive components, industrial parts, mounts, clips and functional products where a clean engineering appearance is required. The material combines high toughness, impact resistance, wear resistance and self-lubricating nylon behavior.

Important: eSUN PA Black is standard PA nylon without carbon fiber. It is not PA-CF, not PA12+CF and not PAHT-CF. The material is not a carbon fiber filament and does not have a carbon-fiber surface, but it requires mandatory drying before printing and preferably dry box or eBOX printing.

✅ Key advantages

• Engineering PA nylon: material for strong, working and functional parts.
• Black technical color: practical shade for housings, mechanics, automotive and industrial parts.
• High toughness: PA withstands deformation and impact loads better than brittle plastics.
• High impact resistance: suitable for parts exposed to mechanical impact.
• Elongation at break up to 175.32% according to TDS: suitable for tough functional parts.
• Self-lubricating wear resistance: useful for gears, guides, sliding elements and mechanical assemblies.
• Good chemical resistance: suitable for many technical and industrial applications.
• Resistance to oils and greases: useful for automotive and mechanical components.
• Low shrinkage: with proper drying and tuning, the material is less prone to deformation.
• Not carbon fiber: the material is not a CF composite and does not require a mandatory wear-resistant nozzle like PA-CF.

📐 Technical specifications

Property	Value
Brand	eSUN
Material	PA / ePA
Material type	Nylon 6/66 copolymer / polyamide
MSDS composition	Polyamide — 100%
Color	Black
Diameter	1.75 mm
Net weight	1 kg
Print technology	FDM / FFF
Surface type	Technical, clean, moderately matte
Abrasiveness	Not a carbon fiber material
Recommended nozzle	0.4 mm standard; hardened steel nozzle recommended by eSUN for reliability
Recommended hotend	High-temperature hotend, preferably all-metal
Main applications	Gears, mechanics, housings, brackets, mounts, automotive parts, electronics, functional prototypes, consumer products

📊 Physical and mechanical properties

The official eSUN product page provides values separated by XY and Z directions. For FDM printing, this is important because final part properties depend on model orientation, layer direction, drying, infill and layer adhesion quality.

Property	Value
Density	1.12 g/cm³
Melt Flow Index	12.3 at 230 ℃ / 2.16 kg
Heat deflection temperature	99.6 ℃ at 0.45 MPa according to the official product page
Tensile strength XY	43.64 MPa
Tensile strength Z	41.46 MPa
Elongation at break XY	164.88%
Elongation at break Z	10.77%
Flexural strength XY	53.9 MPa
Flexural strength Z	54.2 MPa
Flexural modulus XY	1482.73 MPa
Flexural modulus Z	1641.81 MPa
IZOD impact strength XY	75.87 kJ/m²
IZOD impact strength Z	4.44 kJ/m²

TDS reference values

TDS property	Value
Density	1.12 g/cm³
MFI	12.3 at 230 ℃ / 2.16 kg
Tensile strength	52.45 MPa
Elongation at break	175.32%
Flexural strength	58 MPa
Flexural modulus	1370 MPa
IZOD impact strength	18.4 kJ/m²
Heat deflection temperature	50 ℃ at 0.45 MPa according to TDS

HDT differs by source and test method: the official product page lists 99.6 ℃, while the TDS lists 50 ℃. Real heat resistance of an FDM printed part depends on geometry, layer direction, infill, load and print settings.

⚙️ Recommended Printing Parameters

Parameter	Recommended value
Drying before printing	70 ℃ for more than 12 hours
Nozzle temperature	250–290 ℃
Bed temperature	70–90 ℃
Fan speed	0%
Print speed	40–100 mm/s
Maximum speed after tuning	Up to 150 mm/s
Nozzle	0.4 mm standard
Hardened steel nozzle	Recommended by eSUN; especially useful for long technical printing
Dry box printing	Recommended
Heated bed	Required
Enclosure	Not mandatory, but stable temperature is useful for large parts

🔧 Printing recommendations

• Dry the spool at 70 ℃ for more than 12 hours before printing.
• During printing, use a dry box, eBOX or sealed filament container.
• Do not leave PA open in a humid room: nylon absorbs moisture quickly.
• Use a hotend that works stably in the 250–290 ℃ range.
• For long technical printing, a hardened steel nozzle is preferable, although PA Black is not a CF composite.
• Cooling is usually disabled to improve layer adhesion.
• For functional parts, start at 40–60 mm/s and increase speed after profile tuning.
• For large models, maintain stable temperature around the part and avoid drafts.
• For better bed adhesion, use a brim or a suitable adhesive layer.
• After printing, let the part cool gradually to reduce internal stress.
• For gears, clips and mechanical assemblies, test clearances on the actual printer and profile.

🧩 Best applications

• ⚙️ Gears, toothed wheels and mechanical elements.
• 🔩 Brackets, mounts, holders, fixtures and clips.
• 🏭 Industrial jigs, fixtures and functional prototypes.
• 🚗 Automotive parts, technical inserts and mounting elements.
• ✈️ Aerospace prototypes and lightweight functional components.
• 🔌 Electrical and electronic housings, panels and protective elements.
• 🧩 Parts for equipment, machines, mechanisms and 3D printers.
• 🧪 Durable parts — strong working parts for testing and real use.
• 📦 Consumer products, housings, handles, clips and functional elements.
• ⚫ Black technical parts for mechanics, automotive, electronics and industrial use.

✅ 3D printer compatibility

eSUN PA Black is compatible with FDM/FFF 3D printers using 1.75 mm filament, supporting a 250–290 ℃ nozzle temperature range and a 70–90 ℃ heated bed. Stable printing requires dry material, a high-temperature hotend, good bed adhesion 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 the required hotend temperature and stable feeding of nylon filament.

For hotends with PTFE tubing, check the maximum allowed temperature. For long PA printing, an all-metal hotend is recommended, especially when printing near the upper end of the temperature range.

PA Black vs PA12 vs PA-CF vs PA12+CF

Material	Base	Feature	When to choose
PA Black	Nylon 6/66 copolymer	High toughness, impact resistance, self-lubricating wear resistance, black technical color	For gears, housings, clips, mounts, mechanical parts and black functional prototypes
PA12	PA12 nylon	Low moisture absorption, dimensional stability, good tough-flexible behavior	For parts where shape stability under humidity and temperature influence is important
PA-CF	PA / nylon + carbon fiber	Higher rigidity, strength and matte carbon-fiber surface	For loaded mechanics and parts requiring rigidity
PA12+CF	PA12 nylon + reinforcing fibers	Stable PA12 composite with increased rigidity and low moisture absorption	For drones, robots, precision rigid housings and engineering components

📦 Storage and drying

• Dry PA Black 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 bubbles, popping, roughness or weak layer adhesion appear, dry the material again.

🛡️ Safety during printing and post-processing

eSUN PA Black is not classified as a hazardous chemical under GHS, but standard safety measures should be followed during printing and post-processing. Print in a ventilated area and avoid overheating, open flames, sparks and hot surfaces.

When drilling, sanding, cutting or mechanically processing PA parts, safety glasses and a mask are recommended, especially if fine dust is produced.

📄 File Download: technical files and certificates

• PA 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

 

 

Are PA and ePA the same material?

Yes. PA is the main commercial name, while ePA appears in eSUN technical documents and materials.

Does PA Black contain carbon fiber?

No. eSUN PA Black is a standard nylon filament without carbon fiber. If a reinforced material is needed, choose PA-CF or PA12+CF.

Does PA Black need drying before printing?

Yes. PA should be dried at 70 ℃ for more than 12 hours. During printing, a dry box or eBOX is recommended.

Does PA Black require a wear-resistant nozzle?

PA Black is not a carbon fiber material, so a wear-resistant nozzle is not as critical as for PA-CF. However, eSUN recommends a hardened steel nozzle for reliability, especially for long technical printing.

Is PA Black suitable for gears?

Yes. PA is suitable for gears and mechanical parts thanks to wear resistance, self-lubricating nylon behavior, toughness and impact resistance. For accurate gear operation, clearances and print profiles should be tested.

Is PA Black beginner-friendly?

PA is more demanding than PLA and PETG. Successful printing requires profile tuning experience, material drying, dry box printing, a high-temperature hotend and good bed adhesion.

 

 

🚀 Why buy

eSUN PA Black is a practical engineering nylon filament for users who need a strong, impact-resistant and wear-resistant material in a black technical color. It is suitable for gears, mounts, housings, clips, automotive parts, electronics, functional prototypes and durable parts.