FDM / FFF 3D Printing:
PA6/PA66 (extruded Nylon)


FDM 3D printed Nylon PA& PA66 snap fit
FDM 3D printed Nylon PA& PA66 gear wheel
FDM 3D printed Nylon PA& PA66 snowboard binding
FDM 3D printed Nylon PA& PA66 actuator

PA6 / PA66 (commonly called Nylon) is one of the most used engineering polymers in the industry. It is a flexible material with a high modulus and almost impossible to break. Furthermore, it displays very high abrasion resistance. While the FDM / FFF printing technology has limitations in surface quality and accuracy, it creates parts which are almost as strong as injection molded ones.



Overview

Icon Technology

Technology

FDM/FFF 3D Printing

Icon Colors

Colors

Black

Icon Max. Size

Max. Size

200 x 200 x 200 mm

Icon pricing

Cost

$$$
(Low)

Icon Lead Time

Lead Time

3 – 5 business days

Icon Accuracy

Accuracy

± 0.5% with a lower limit of 0.5 mm


Material Details


Click on the topics of your interest.

Early stage prototypes

PA6 / PA66 is significantly more flexible than ABS and therefore almost impossible to break (for thin structures). The material is very abrasion resistant and is a great choice for moving parts or any part that faces mechanic stress (e.g. cases).
Due to the 3D printing technology (FDM / FFF), the parts have limited surface quality (rough, layers visible) and an accuracy of only ~0.5%, with a lower limit of 0.5 mm.

Indicative price

  • Individual orders
    • Approx. EUR 0.75 / cm³ material volume (excl. 19% VAT; or EUR 0.89 incl. 19% VAT).
    • Set-up fee of EUR 5.00 (excl. 19% VAT; or 5.95 incl. 19% VAT) per shell.
  • Small batch series are individually calculated based on material consumption and printing time.

Characteristics

  • Machine running time: FDM / FFF 3D printing is a very slow process. Even with moderate sizes, printing time can be of one day and more. Since the method is more error-prone compared to other technologies, the probability of errors occurring during very long print times increases and the process has to be repeated.
  • Post processing: FFF / FDM 3D printing requires support structures. Depending on the geometry, removal of support material can be very simple or hard (especially for undercuts).

Look & Feel

  • The printed layers are visible. Compared to ABS, the surface is more rough.
  • The models are not printed solid, but with a stabilizing structure inside (20% infill). Therefore the parts are very light
  • Support structures are necessary for most parts. In the ares where these structures were applied, the surface is dull and rougher. PA6 / PA66 is printed with water-soluble support, so that the contact areas are in general better compared to ABS.

Essential properties

  • PA6 / PA66 is very flexible with thin structures and can be used for moving parts (snap closures, etc.).
  • Unless desired, cavities are not printed solidly but with approximately 20% stabilization structure (infill).
  • FDM / FFF prints are anisotropic, that is, the mechanical load-ability is direction-dependent (along the layers the components break faster than perpendicular to the pressure layers). We can adapt the printing orientation to your requirements.

Tensile
Strength

34 MPa

Elongation
of break

~210%

Modulus of Elasticity

N/A

Flexural
Strength

N/A


Vicat A

N/A

Shore
hardness

N/A

symbol wall thickness

Minimum Wall Thickness
The minimum wall thickness is 1 mm. The longer a structure becomes, the stronger it should be designed.

symbol cavitiess

Cavities
Cavities can be printed if no support structure is required inside, otherwise a stabilizing structure (‘infill’) will be printed inside the cavity.

symbol clearance gap

Clearance Gap
If your file contains two separate shells, leave at least 1 mm clearance gap between them. Depending upon the design, support material is printed between the objects, which can not be removed if the distances are too small.

Symbol resolution

Resolution
The minimal detail size should not be smaller than 1 mm.

symbol interlocking parts

Interlocking parts
You can print interlaced objects with the FDM / FFF 3D print. It also applies 1 mm distance to avoid a fusion of the objects.

symbol Bounding Box

Bounding box
The maximum size of an object cannot exceed 200 x 200 x 200 mm.

Standard-Finishing

  • Removal of support structure

Optional Finishing

  • Epoxy resin coating (for surface smoothing)

The FDM / FFF process works by melting a string of plastic and applying it layer-by-layer onto a build platform. Since the plastic is fully melted, with sufficient thickness the 3D printed pieces have similar mechanical characteristics as those from injection molding. Due to the relatively slow printing process the inside of solid models are usually filled with a stabilizing space-fame instead of being printed solid. That space-frame is defined by the Infill Rate – the percentage of the volume which is actually filled with solid material. This is typically set at 20% of the inside.

For details on the printing process, please visit our page FDM/FFF: Technology Overview.

Visualization of the FDM / FFF process; Source: youtube.com / The 3D Printing Professor