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Best nylon filament: unfilled, carbon-filled and glass-filled options

Choose the formulation your part needs, then check whether the printer and dryer can support it.

Conceptual illustration for Best nylon filament: unfilled, carbon-filled and glass-filled options
Find your fit

Your shortlist

Select a product to explore its fit and specifications.

Product

SUNLU Easy PA

Unfilled nylon route
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Product

Fiberon PA12-CF10

PA12 composite route
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Product

Fiberon PA6-CF20

PA6 carbon composite
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Product

Fiberon PA6-GF25

Glass-filled option
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Four materials, four different starting points

Material Role in this shortlist Main qualification task
SUNLU Easy PA Unfilled nylon route Shrinkage, profile and complete drying cycle
Fiberon PA12-CF10 PA12 carbon composite Feeding, surface and exact required properties
Fiberon PA6-CF20 PA6 carbon composite Drying, abrasive hardware and distortion
Fiberon PA6-GF25 Glass-filled PA6 Surface, geometry and moisture-conditioned behavior

Reinforcement is not a universal upgrade. A rougher composite surface can be unsuitable for a contact part, while a thin geometry can behave differently from a thick bracket. Choose the required material properties first; then use the individual reviews to assess the practical printing compromises.

Check the equipment chain before the spool

  • The hotend must support the documented printing range.
  • The nozzle must meet the exact abrasive material and minimum-orifice requirements.
  • The dryer and spool must support the complete drying cycle.
  • The plate preparation must be approved for the material and surface.
  • The final dimensions and behavior need a representative part trial.

Use the nylon dryer shortlist alongside the carbon-fiber nozzle guide. A higher-temperature printer alone is not a complete nylon setup.

Should my first nylon be carbon-filled?

Only if the project calls for that formulation and you have compatible abrasive hardware. Easy PA offers an unfilled route, but its name does not remove calibration and shrinkage. A composite may suit a different requirement rather than simply being better.

ProductUnfilled nylon route
Product image: SUNLU Easy PA
Product image

SUNLU Easy PA

Easy PA is the unfilled option in this group, with useful reports of successful first nylon parts and practical holders. More complex shapes can shrink, and an unsuccessful extended calibration experience tempers the easy-printing label. Its drying documentation also needs a complete cycle, not just an upper temperature.

Key features

  • Reviewed formulation: SUNLU Easy PA nylon 6/66 copolymer according to listing
  • Nominal filament diameter: 1.75 mm
  • Package format: 1 kg spool

Best if

  • You want an unfilled nylon and can calibrate fit on a representative part.

Skip if

  • You expect the name to remove shrinkage or drying preparation.
  • You need a fiber-filled material’s specified properties.
SpecificationsProduct details
Product typeNylon filament
Reviewed formulationSUNLU Easy PA nylon 6/66 copolymer according to listing
Nominal filament diameter1.75 mm
Manufacturer diameter toleranceNot verified for this exact formulation
Package format1 kg spool
Nozzle guidanceSUNLU TDS: 250–270°C at 50–100 mm/s; 270–280°C at 100–150 mm/s. Bed: 30–50°C on textured PEI with glue, subject to plate permission.
Material careSUNLU TDS gives 80–110°C drying, without a duration. Confirm the full cycle and supplied spool limit; the upper temperature alone is not a complete procedure.
Variant / handling limitUnfilled Easy PA, not PA6-GF or PA6-CF
ProductPA12 composite route
Product image: Fiberon PA12-CF10
Product image

Fiberon PA12-CF10

PA12-CF10 belongs on a project shortlist when PA12 with carbon filling is an intentional material choice. Successful prints are present, but so are feed breakage, poor surfaces and spool wobble. It is not the automatic beginner pick merely because PA12 appears in the name.

Key features

  • Reviewed formulation: PA12 with 10% carbon fiber
  • Nominal filament diameter: 1.75 mm
  • Package format: 0.5 kg spool

Best if

  • Your design calls for this PA12 composite and you can meet its printing and drying requirements.

Skip if

  • You need a forgiving first nylon roll.
  • Your holder cannot cope with the selected spool or you cannot check feeding before a long print.
SpecificationsProduct details
Product typeFiber-reinforced nylon filament
Reviewed formulationPA12 with 10% carbon fiber
Nominal filament diameter1.75 mm
Manufacturer diameter toleranceNot verified for this exact formulation
Package format0.5 kg spool
Nozzle guidanceManufacturer starting range: 280–300°C nozzle; 40–50°C bed. Match the printer and build surface. Hardened nozzle required; confirm the filament’s minimum orifice.
Material careManufacturer drying guidance: 100°C for 10 hours; verify the supplied spool tolerates the cycle, then store dry.
Variant / handling limitNot interchangeable with other PA6/PA12/PA612 Fiberon grades
ProductPA6 carbon composite
Product image: Fiberon PA6-CF20
Product image

Fiberon PA6-CF20

PA6-CF20 has encouraging results when drying and the printer setup are suitable. Surface roughness and warping in dense parts remain relevant, so it is better treated as a material to qualify than a drop-in strength upgrade. Part orientation, wall design and moisture condition still determine whether the finished object works.

Key features

  • Reviewed formulation: PA6 with 20% carbon fiber
  • Nominal filament diameter: 1.75 mm
  • Package format: 0.5 kg spool

Best if

  • You have abrasive-compatible hardware and a qualified PA6-CF drying routine.

Skip if

  • You want a smooth cosmetic surface without checking a sample.
  • You assume maximum infill automatically prevents distortion.
SpecificationsProduct details
Product typeFiber-reinforced nylon filament
Reviewed formulationPA6 with 20% carbon fiber
Nominal filament diameter1.75 mm
Manufacturer diameter toleranceNot verified for this exact formulation
Package format0.5 kg spool
Nozzle guidanceManufacturer starting range: 280–300°C nozzle; 40–50°C bed. Match the printer and build surface. Hardened nozzle required; confirm the filament’s minimum orifice.
Material careManufacturer drying guidance: 100°C for 10 hours; verify the supplied spool tolerates the cycle, then store dry.
Variant / handling limitNot interchangeable with other PA6/PA12/PA612 Fiberon grades
ProductGlass-filled option
Product image: Fiberon PA6-GF25
Product image

Fiberon PA6-GF25

PA6-GF25 offers a glass-filled route for projects that actually call for it. Good gear and functional-print experiences sit alongside rough fibers, stringing and thin-part problems. It should not be substituted for a carbon-filled grade just because both contain reinforcement.

Key features

  • Reviewed formulation: PA6 with 25% glass fiber by weight
  • Nominal filament diameter: 1.75 mm
  • Package format: 0.5 kg spool

Best if

  • Your design tolerates a rougher surface and specifically suits the glass-filled formulation.

Skip if

  • A smooth skin-contact surface or a thin flexible wet-service part is central to the job.
SpecificationsProduct details
Product typeFiber-reinforced nylon filament
Reviewed formulationPA6 with 25% glass fiber by weight
Nominal filament diameter1.75 mm
Manufacturer diameter toleranceNot verified for this exact formulation
Package format0.5 kg spool
Nozzle guidanceManufacturer starting range: 280–300°C nozzle; 40–50°C bed. Match the printer and build surface. Hardened nozzle required; confirm the filament’s minimum orifice.
Material careManufacturer drying guidance: 100°C for 10 hours; verify the supplied spool tolerates the cycle, then store dry.
Variant / handling limitNot interchangeable with other PA6/PA12/PA612 Fiberon grades

Product Comparison

Feature SUNLU Easy PA Fiberon PA12-CF10 Fiberon PA6-CF20 Fiberon PA6-GF25
Product Image
SUNLU Easy PA
Fiberon PA12-CF10
Fiberon PA6-CF20
Fiberon PA6-GF25
Category Nylon Filaments Nylon Filaments Nylon Filaments Nylon Filaments
Product type Nylon filament Fiber-reinforced nylon filament Fiber-reinforced nylon filament Fiber-reinforced nylon filament
Manufacturer diameter tolerance Not verified for this exact formulation Not verified for this exact formulation Not verified for this exact formulation Not verified for this exact formulation
Material care SUNLU TDS gives 80–110°C drying, without a duration. Confirm the full cycle and supplied spool limit; the upper temperature alone is not a complete procedure. Manufacturer drying guidance: 100°C for 10 hours; verify the supplied spool tolerates the cycle, then store dry. Manufacturer drying guidance: 100°C for 10 hours; verify the supplied spool tolerates the cycle, then store dry. Manufacturer drying guidance: 100°C for 10 hours; verify the supplied spool tolerates the cycle, then store dry.
Nominal filament diameter 1.75 mm 1.75 mm 1.75 mm 1.75 mm
Nozzle guidance SUNLU TDS: 250–270°C at 50–100 mm/s; 270–280°C at 100–150 mm/s. Bed: 30–50°C on textured PEI with glue, subject to plate permission. Manufacturer starting range: 280–300°C nozzle; 40–50°C bed. Match the printer and build surface. Hardened nozzle required; confirm the filament’s minimum orifice. Manufacturer starting range: 280–300°C nozzle; 40–50°C bed. Match the printer and build surface. Hardened nozzle required; confirm the filament’s minimum orifice. Manufacturer starting range: 280–300°C nozzle; 40–50°C bed. Match the printer and build surface. Hardened nozzle required; confirm the filament’s minimum orifice.
Package format 1 kg spool 0.5 kg spool 0.5 kg spool 0.5 kg spool
Reviewed formulation SUNLU Easy PA nylon 6/66 copolymer according to listing PA12 with 10% carbon fiber PA6 with 20% carbon fiber PA6 with 25% glass fiber by weight
Variant / handling limit Unfilled Easy PA, not PA6-GF or PA6-CF Not interchangeable with other PA6/PA12/PA612 Fiberon grades Not interchangeable with other PA6/PA12/PA612 Fiberon grades Not interchangeable with other PA6/PA12/PA612 Fiberon grades
Details / retailer Check current price · Amazon Check current price · Amazon Check current price · Amazon Check current price · Amazon

Match the grade to a defined part

Resolve unfilled versus composite first; then qualify the exact grade.

Unfilled requirement

Start with Easy PA and a small fit trial. Resolve the full drying instructions before extrapolating from a successful print.

Composite requirement

Choose PA12-CF10, PA6-CF20 or PA6-GF25 according to the required grade, not the biggest reinforcement number. Qualify surface, dimensions and use conditions.

Is more reinforcement automatically better?

No. Select the grade required by the part and confirm nozzle, drying and printing compatibility before comparing reinforcement percentages.

Frequently Asked Questions

Does PA12-CF10 versus PA6-CF20 give me a simple strength ranking?

No. Both the base polymer and formulation differ. Compare the property your part needs under comparable test and moisture conditions rather than ranking products by the number in their names.

Which moisture condition should I use when comparing nylon technical data?

Use the condition relevant to the finished application and check how each supplier labels its results. Dry and conditioned data should not be combined into one ranking without accounting for that difference.

What should I request if a nylon listing lacks drying or nozzle instructions?

Ask for the exact formulation’s current technical and printing guidance. Keep the purchase provisional until the missing preparation and hardware requirements are resolved.

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