Multi Jet Fusion (MJF)

Polypropylene PP (MJF) 3D printing

Polypropylene (PP) in Multi Jet Fusion combines chemical resistance with low moisture absorption, for ducts, tanks and fluid-contact parts. We offer MJF printing in PP, quoted job by job.

1 variantData checked on 13 November 2026

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What it is for

Polypropylene in MJF is used for parts in contact with fluids: ducts, manifolds, tanks, fittings, caps, laboratory containers and plant components. It resists acids, bases, detergents and many solvents, absorbs very little water and is light: the data sheet reports a density of 0.87 g/cm³. It is the same polymer as many series parts, so the prototype comes close to the final part.

It is less stiff and less strong than nylon and softens sooner in heat: do not choose it for structural parts or for heavily loaded clips, where nylon in MJF is the better fit. For aggressive chemicals at high temperature move to PPS.

Variants compared

Polypropylene PP (MJF): properties of the variants from the makers' data sheets, one column per variant
Property	PPQuote
Mechanical
Tensile strengthASTM D638, XY	29 MPa28 MPa Z
Tensile modulusASTM D638, XY and Z	1,550 MPa
Elongation at breakASTM D638, XY	16%13% Z
Thermal
Heat deflection temperature (HDT) at 0.45 MPaASTM D648, XY and Z	100 °C
Heat deflection temperature (HDT) at 1.8 MPaASTM D648, XY and Z	60 °C
Melting point (Tm)ASTM D3418, on the powder	138 °C
Physical
DensityASTM D792	0.87 g/cm³
Source	Powder maker's data sheet, Aug 2026, documentread on 13 November 2026

Typical values from the makers' data sheets, measured on specimens under the conditions stated. They are not guaranteed design values: for a critical application ask us for a test on your part.

Design limits

Build volume: 380 × 284 × 380 mm
Minimum wall: 1 mm
Dimensional tolerance: ±0.3 mm up to 100 mm, ±0.3% above

These are the limits of the process, the same for every variant unless stated. For critical dimensions, talk to us before printing.

Which variant to choose

In MJF we offer a single polypropylene. Choose PA12 or PA11 in MJF when mechanical strength and stiffness matter more than chemical resistance; filament PPS when the fluid is aggressive and hot.

Data sheets

Powder maker's data sheet, Aug 2026, documentread on 13 November 2026
Columns: PP

FAQ

Frequently asked questions

Polypropylene resists most acids and bases, salt water, alcohols and detergents, and absorbs very little water. Strong oxidizers, aromatic hydrocarbons and chlorinated solvents attack it, especially when hot. Compatibility depends on concentration and temperature: state the fluid in your request.

The powder maker's data sheet reports a tensile strength of 29 MPa in XY and 28 MPa in Z and an elongation at break of 16% and 13% (ASTM D638); the heat deflection temperature is 100 °C at 0.45 MPa and 60 °C at 1.82 MPa (ASTM D648). It is a ductile, light material, not a structural one.

MJF gives dense parts and polypropylene absorbs very little water: that is why it is used for tanks and ducts. Tightness, however, depends on wall thickness and pressure. State the fluid, pressure and temperature in your request; for a critical application ask us for a test on your part.

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