The Speed of Innovation: Multi Jet Fusion
Multi Jet Fusion (MJF) represents the pinnacle of high-volume additive manufacturing.
Developed by HP and refined through Prototal’s industrial expertise, MJF utilizes a unique thermal control process to produce parts with exceptional mechanical properties and surface uniformity. For projects requiring runs of up to 100,000 units with rapid turnaround times, MJF is the definitive technology for digital mass production.
Industrial MJF Material Portfolio
PA 11
Offering superior impact resistance and ductility compared to Nylon 12, PA 11 is derived from renewable sources, making it a more sustainable, high-performance option.
PA 12
Known for its exceptional strength and fine resolution, this Nylon 12 powder provides a smooth finish and excellent chemical resistance, perfect for complex, detailed parts.
PA 12 White
For applications requiring high aesthetic clarity and color versatility, PA 12 White provides excellent detail resolution and a clean finish, ideal for medical housings and consumer goods.
PA 12 GB
Reinforced with 40% glass spheres, this material offers superior dimensional stability and high stiffness, making it the definitive choice for structural components that face thermal stress.
PA 12 S
Optimized for high-volume serial production, PA 12 S delivers a balanced profile of strength and surface quality, ensuring consistent mechanical performance for large build batches.
How it Works: The MJF Process
Unlike traditional laser-based systems, MJF uses an inkjet array to apply fusing and detailing agents across a bed of nylon powder, which are then fused by an overhead infrared heat source.
The Step-by-step Process in MJF
- Material Deposition: A thin layer of polymer powder (typically PA12 or PA11) is spread across the build area.
- Agent Application: An inkjet print head sweeps across the bed, depositing a fusing agent where the part is to be solid and a detailing agent around the contours to ensure sharp edges and smooth surfaces.
- Thermal Fusion: Infrared lamps pass over the bed, fusing the areas treated with the fusing agent. Because the entire layer is fused in one pass, MJF offers significantly faster build speeds than point-to-point laser sintering.
- Voxel-Level Precision: By controlling the properties of each “voxel” (a 3D pixel), MJF achieves near-perfect isotropy, meaning the parts have nearly identical strength in the X, Y, and Z axes.
- Cooling and Extraction: After the build, the “natural cooling” process ensures dimensional stability before the parts are excavated from the powder bed and moved to post-processing.
Engineering Your Perfect Surface for your MJF Part
We empower you to tailor every surface to your exact requirements — whether your application demands the high-gloss, fluid-tight seal, a refined tactile haptic, or the vibrant, scratch-resistant branding with dyecoloring.
By utilizing industry-leading technology from partners like AMT, AM Solutions and DyeMansion, we ensure that your parts don’t just meet mechanical tolerances but also achieve the specific resilience your project requires.
Datasheets at a Glance
| MJF | Density (g/cm³) | Tensile strength (MPa) | Tensile modulus (MPa) | Elongation at break | Charpy IS (kJ/m² at 23°C) | HDT (°C) |
|---|---|---|---|---|---|---|
| PA 11 | 1.05 | XY 52 | XY 1800 | XY 35-50% | XY N (unnotched) | XY 46 (1.80 Mpa) |
| PA 12 | 1.01 | XY 48 | XY 1700 | XY 15-20% | XY N (unnotched) | XY 95 (1.80 Mpa) |
| PA 12 S | 1.01 | XY 49 | XY 1800 | XY 20% | XY N (unnotched) | XY 92 (1.80 Mpa) |
| PA 12 GB | 1.47 | XY 30 | XY 2800 | XY 5-10% | XY 13.5 / Z 9 (unnotched) | XY 114 (1.80 Mpa) |
| PA 12 W | 1.01 | XY 48 | XY 1700 | XY 15-20% | XY N (unnotched) | XY 94 (1.80 Mpa) |
The data shown is indicative and intended for reference only. Material properties may vary depending on printing conditions and technology. Although care has been taken to ensure accuracy, typographical or data entry errors may occur. For authoritative specifications, please refer to the original manufacturer datasheets provided under each material.
3D Print Guidelines
Our helpful guides are specifically designed to assist you before submitting your design to us. We always strive to achieve the best possible outcome, and by following our guidelines, you can be confident that your design will be of the highest quality.
Get in touch with us if you need guidance, we are happy to help you!
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Quote Your Next Project
Looking for high-quality industrial 3D printing solutions tailored to your needs? Our team is ready to provide a detailed quote for your project. Simply share your specifications, and we’ll deliver a clear, competitive estimate — no surprises, just precision and reliability.
Why choose us?
- 3D printing solutions for any scale and complexity
- Fast and accurate quoting process
- Local presence close to your business and business needs
Explore our HP certified facilities near you
FAQs
Do you have questions regarding MJF Industrial 3D Printing? Find the most common questions and answers about the subject here.
Our biggest industrial MJF platforms from HP can accommodate build volumes up to 380 x 284 x 380 mm depending on part geometry. However, for larger components, we can utilize advanced bonding techniques allowing for the creation of massive assemblies.
While MJF parts are naturally porous due to the sintering process, we offer specialized sealing with vapor smoothing. These post-processing steps close the surface pores, making the components airtight and resistant to fluid ingress, which is essential for tanks, manifolds, and ducting.
Yes, MJF PA 12 is approved for skin contact provided the correct post-processing and finishing.
We offer a range of post-processing services to ensure your 3D printed parts meet the highest standards of quality, precision, and aesthetics.
MJF 3D Printing Post-Processing
- Vapor Smoothing
- Vibratory Finishing
- Bead Blasting
- Coloring
- Primer, Painting, coating & lacquering
- Threaded/non-threaded inserts
- Assembly
Manufacturing should not be transactional. At Prototal we value a partnership, which is why you will get a dedicated contact person close to your operations that knows your business and business needs. To start our future partnership, please reach out to the local team within your area that can be found under Contact us or send us an e-mail:
- Norway: post@prototal.no or +47 74 09 06 00
- Sweden: 3dp@prototal.se or +46 (0) 36-38 72 00
- Denmark: 3dp@prototal.dk or +45 43 99 37 36
- United Kingdom: info@prototaluk.com or +44 01635 635855
- Italy: info@prosilas.com or +39 0733 892665
- Austria: 3dp@prototal.at
As a flexible partner we can offer lead times down to 1 working day depending on the selection of material, post-processing, quality control and your business location. Usually, you can expect a lead time within the range of 2-3 working days, depending on same variables as stated above.
*While Prototal offers industry-leading turnaround times, all delivery schedules are estimates based on standard operating conditions. Final lead times are subject to part geometry, build volume, and specific material selection. Complex geometries requiring extensive support structures or high-performance materials may require additional processing time to ensure structural integrity and dimensional accuracy.
