Why MJF?
Suitable for series
Many parts per run, consistent quality.
Dense & uniform
Very homogeneous properties in all directions.
Fine surface
Finer than classic SLS, easy to dye.
No supports
Complex shapes and assemblies in one print.
MJF at ProtyLabs
Guide values. What is realistic for your part, we clarify in the quote.
| Feature | Value |
|---|---|
| Processes | Multi Jet Fusion (HP) |
| Materials | PA12, PA12 GB, PA11, PP, TPU |
| Surface | grey, usually dyed black |
| Quantity | from single parts, strongest for small and larger series |
Materials for MJF
PA12 (MJF)
Dense, dimensionally accurate, suitable for series – the all-rounder.
PA12 GB (MJF)
Filled with 40 % glass beads: stiff, dimensionally accurate, temperature-resistant.
PA11 (MJF)
High elongation at break, bio-based.
PP and TPU (MJF)
Chemical-resistant or elastic.
What we use it for
How to make your part better
When another process is a better fit
FDM
For simple one-offs, often faster and cheaper.
SLA
When the surface must be mirror-smooth.
SLM (metal)
When plastic reaches its limits.
MJF or SLS – what is the difference?
Both processes work with plastic powder and without support structures. In Multi Jet Fusion, a print head applies fusing and detailing agents and a heat source fuses the whole layer at once. This produces particularly dense, uniform parts with a fine surface – ideal for series, because many parts are made in the same quality.
SLS is more flexible with materials and single parts. Rule of thumb: from a few dozen to hundreds of identical PA12 parts, MJF plays to its strengths. MJF parts are grey and are usually dyed black; blasting, smoothing and threaded inserts are possible just as with SLS.
Key values
| Materials | PA12, PA12 GB, PA11, PP, TPU |
|---|---|
| Wall thickness | from approx. 1 mm, safe from 1.5 mm |
| Clearance | at least approx. 0.5 mm |
| Surface | grey, usually dyed black |
| Strength | small and larger series |
FAQ about MJF
What is the difference between MJF and SLS?
Both work with powder and without supports. MJF fuses a whole layer at once and delivers particularly uniform, dense parts – ideal for series. SLS is more flexible with materials and single parts.
From what quantity is MJF worthwhile?
From just a few parts; MJF really shines with small and larger series.
Can I get MJF parts post-processed?
Yes. We also offer dyeing, blasting, chemical smoothing and threaded inserts for MJF parts.
Want to turn your idea into a finished part?
Send us CAD data, a photo, a sketch or the original part. We check feasibility, process and material and get back to you with an assessment and a quote.