Polypropylene (PP)

The lightest and cheapest, if the load allows it.

Materials › Polypropylene (PP)

Density below 1 and low cost: PP is the choice when the part does not need to be stiff but needs to be plentiful and light. It offers good resistance to many acids, bases and aqueous solutions, but compatibility has to be checked against substance, concentration, temperature and contact time, with particular attention to oxidisers and solvents. Here, though, the axis is not «how much filler» but «which filler»: talc and glass fibre do two different things, and one of the two makes the part worse if chosen for the wrong reason.

Unfilled PP

Light and cheap

Containers, bodies, parts in contact with acids and bases.

Stiffness 1,375 MPa tensile modulus, ISO 527 12 grades
Density 0.90 g/cm³ density, ISO 1183 11 grades

Mineral-filled PP

Talc: stiffer, not stronger

Panels and shells that must not flex, at contained cost.

Stiffness 3,450 MPa tensile modulus, ISO 527 6 grades
Density 1.14 g/cm³ density, ISO 1183 7 grades

Glass-fibre reinforced PP

Stiff and strong

Brackets and mounts under load, where PA would cost too much.

Stiffness 6,050 MPa tensile modulus, ISO 527 8 grades
Density 1.12 g/cm³ density, ISO 1183 7 grades

Brands and manufacturers

Data from producers’ datasheets, medians per family: they are for comparing levels with one another, not guaranteed values. We supply the datasheet of the chosen grade on request.

Real components, not renderings

Parts made in our own plants, with finishing done in-house.

Grey tapered duct printed in MJF, on a white background: a circular mouth narrowing into a flat spout.
PA12 duct, thin wall and varying section
Curved grey plate printed in MJF, pierced by dozens of round and shaped holes.
Lightened plate: holes and ribs in a single part
Two black fittings with a square base and a threaded cylindrical body, on a white background.
Same technology, black finish
Hands in blue gloves finishing a drilled grey bracket by hand, with a rotary tool.
We do the finishing ourselves, part by part

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