Multi Jet Fusion (MJF) is an industrial powder-bed 3D printing technology developed by HP. It produces parts by applying fusing and detailing agents across a layer of polymer powder, followed by controlled heat that fuses the selected areas.

MJF is designed for producing strong, accurate and functional parts with consistent mechanical properties. Since the surrounding powder supports the components during printing, separate support structures are not required. This allows complex parts to be manufactured without support marks.

Why Choose MJF?

• Strong parts suitable for functional applications
• Good dimensional accuracy and repeatability
• Consistent mechanical properties
• No support structures or support-removal marks
• Suitable for complex shapes and internal features
• Efficient for batch and low-volume production
• Allows multiple parts to be packed into one production build
• Produces lightweight components without moulds or tooling

Common MJF Materials

Material availability depends on the part requirements and production system. Common options include:

• PA12 Nylon: A strong and versatile material for functional parts
• PA11 Nylon: Offers greater flexibility and impact resistance
• Glass-filled PA12: Provides increased stiffness and dimensional stability

Applications of MJF Printing

MJF is commonly used for:

• Functional engineering prototypes
• End-use production components
• Housings, covers and enclosures
• Brackets, clips and mounting components
• Snap-fit and press-fit assemblies
• Ducts and complex internal channels
• Jigs, fixtures and manufacturing aids
• Replacement and customised components
• Lightweight industrial parts
• Low-volume and bridge production

When Should You Choose MJF?

MJF is a good choice when you require:

• Strong parts for functional testing or end use
• Consistent quality across multiple components
• Complex geometry without support structures
• Small or medium production batches
• Snap-fit features or moving assemblies
• Lightweight components with optimised internal structures
• Production without investing in moulds or tooling

MJF vs SLS

Both MJF and SLS are industrial powder-bed technologies capable of producing strong, complex parts without support structures. The right option depends on the material, part design, quantity and finish required.

MJF - SLS Uses fusing and detailing agents combined with heatUses a laser to fuse polymer powderWell suited to repeatable batch productionSuitable for prototypes and production partsGenerally provides consistent mechanical propertiesProvides strong and durable functional partsOften offers sharper edges and more uniform surface definitionTypically has a slightly grainier surface textureCommonly used with PA12, PA11 and TPU. Usually offers a broader selection of compatible materialsRaw parts are generally grey. Raw parts are commonly white or off-whiteIdeal for production quantities and repeated componentsIdeal for complex prototypes and varied production requirements

The actual accuracy, strength and surface finish will depend on the selected material, part geometry, build orientation and post-processing.

At Tote3D, we provide MJF printing solutions for industrial prototypes, functional components and low-volume production requirements. Parts can also be dyed, polished or finished depending on the required appearance and application.

Share your 3D model, quantity and application requirements with us, and we will help you select the appropriate material and manufacturing process.