Multi Jet Fusion

MJF 3D printing builds quality nylon parts suitable for rapid prototyping and production.

Multi Jet Fusion is an industrial 3D printing process that produces functional nylon prototypes and end-use production parts in as fast as 1 day. Final parts exhibit quality surface finishes, fine feature resolution, and ‬more consistent mechanical properties when compared to processes like selective laser sintering.

Common applications for Multi Jet Fusion are:

  • parts requiring consistent isotropic mechanical properties
  • functional prototypes and end-use parts
  • complex and organic geometries with fine features

Multi Jet Fusion Design Guidelines & Capabilities

mjf part

MJF Material Options

PA 12 Black

PA 12 Black is a high tensile strength nylon. Final parts are dyed black, and they exhibit quality surface finishes and slightly more isotropic mechanical properties when compared to SLS. When more detail is required, PA 12 can achieve smaller minimum feature resolution 0.5mm as compared to SLS materials 0.75mm PA 12 Black is the best material option for designs that incorporate living hinges.

Primary Benefits

  • Near isotropic mechanical properties
  • Economical material choice


PA 11 Black

PA 11 Black provides excellent ductility and temperature resistance without sacrificing tensile strength. It offers one of the highest elongation break thresholds in the nylon family.

Primary Benefits

  • Isotropic Mechanical Properties
  • Enhanced Elongation at Break
  • Water and airtight without any further treatment


UltrasintTM TPU-01

This thermoplastic polyurethane (TPU) combines rubber-like elasticity and elongation with good abrasion and impact resistance. Ideal for automotive components due to its high chemical resistance to oil and grease. Also possessing high UV resistance. Showing high accuracy and detail resolution, supporting optimisation of lattice structure designs.

Primary Benefits

  • Flexibility
  • Tear and Abrasion Resistance
  • High Durability




Compare MJF Material Properties

Material Colour Tensile Strength Tensile Modulus Elongation
PA 12 Black Black 49 MPa ± 4 MPa 1900 MPa ± 200 MPa 12% ± 4%
PA 11 Black Black 52 MPa 1800 MPa 35%
UltrasintTM TPU01 Black 9MPa ± 2MPa 75 MPa >220%


These figures are approximate and dependent on a number of factors, including but not limited to, machine and process parameters. The information provided is therefore not binding and not deemed to be certified. When performance is critical, also consider independent lab testing of additive materials or final parts.

Multi Jet Fusion Surface Finish

Standard  A bead blast removes all powder and leaves a consistent overall texture. Parts are then dyed a standard black color.
Custom Secondary options include a primer that can be applied as well as taps and inserts.  




mjf part with threaded holes


STANDARD A bead blast removes all powder and leaves a consistent overall texture. Parts are then dyed a standard black colour.

Available Secondary options:

Natural surface (grayish, not dyed black)
Untreated material is certified according to following standards: UL 94 (Standard for Safety of Flammability of Plastic Materials for Parts Devices and Appliances testing) and UL 746A (Standard for Polymeric Materials to measure Short Term Property Evaluations) (inkl. link to HP pdf)

Taps and Inserts

Assembly (bonding, screwing etc.)

Vapour Smoothing

Vapour Smoothing Parts are treated through an automated, high-quality, post-processing technique, which leaves them with great aesthetics and sealed surfaces that are water and air tight, and easy to clean. Currently available for following materials: SLS PA 12 White and MJF Ultrasint™ TPU-01

For proper smoothing, a minimum wall thickness of 1.5 mm is required.

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About Multi Jet Fusion


Multi Jet Fusion: What is it used for?

For fast, quality results, Multi Jet Fusion (MJF) is unparalleled as a 3D printing process. It’s able to produce functional nylon prototypes and end-use production parts in a single day, featuring quality surface finishes and fine feature resolution. It also offers more consistent mechanical properties than similar processes like selective laser sintering.

Using an inkjet array to repeatedly apply fusing agents across a bed of nylon powder, followed by fusion into a solid layer via heating elements, MJF is able to offer complex and detailed features. Protolabs offers a commercial-grade unfilled Nylon 12 material to create durable parts. Multi Jet Fusion offers a fast and advanced way to create parts on demand. Discover more with this short video.

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