SLS / MJF · Powder polymers · Engineering
PP (MJF / SAF)
Chemical resistant, weldable and watertight lightweight parts.
What is PP (MJF / SAF)?
Powder bed PP makes it possible to produce polypropylene parts without the warping issues of FDM. It gives weldable, lightweight and watertight parts for chemical tanks, fluid systems and automotive parts.
- Chemical resistant
- Lightweight
- Food-contact grades available
Technical data
Typical values compiled from common manufacturer datasheets; they vary by brand and grade.
| Tensile strength | ≈ 30 MPa |
|---|---|
| Elongation at break | ≈ 20% |
| Tensile modulus | ≈ 1.6 GPa |
| Heat deflection temperature (0.45 MPa) | ≈ 100 °C |
Design guidelines for PP (MJF / SAF)
General guidelines for SLS technology. All design guidelines
- Minimum wall thickness0.7 – 1 mm
- Smallest detail0.5 mm
- Clearance for moving parts0.5 mm (moving parts)
- Text and logosEmbossed ≥ 1 mm
- Minimum hole diameterØ 1.5 mm
- Unsupported overhang angleUnlimited (no supports needed)
- Escape holeAt least two Ø 5 mm powder escape holes in hollow parts
Applications
- Fluid and chemical containers
- Automotive parts
- Weldable parts
Advantages
- Excellent chemical resistance
- Low moisture absorption
- Lightweight
Limitations
- Low stiffness
- Difficult to glue
Comparison
PP (MJF / SAF) and alternatives
| Property | PP (MJF / SAF) | PP | PA12 (Nylon 12) | PETG |
|---|---|---|---|---|
| Density | 0.89 g/cm³ | 0.9 g/cm³ | 1 g/cm³ | 1.27 g/cm³ |
| Tensile strength | 30 MPa | 25 MPa | 48 MPa | 52 MPa |
| Elongation at break | 20 % | 200 % | 18 % | 83 % |
| Modulus (stiffness) | 1.6 GPa | 0.9 GPa | 1.7 GPa | 1.07 GPa |
| Heat deflection (0.45 MPa) | 100 °C | 90 °C | 165 °C | 64 °C |
Values are averages of typical ranges; see each material page for details.
Good to know
Frequently asked questions about PP (MJF / SAF)
What is PP (MJF / SAF)?
Powder bed PP makes it possible to produce polypropylene parts without the warping issues of FDM. It gives weldable, lightweight and watertight parts for chemical tanks, fluid systems and automotive parts.
Is PP (MJF / SAF) heat resistant?
The heat deflection temperature (0.45 MPa) of PP (MJF / SAF) is about 100 °C. This is high; it can be used near engine bays, in hot air and steam.
Can PP (MJF / SAF) be used outdoors?
It usually performs well in short and medium-term outdoor use; for parts exposed to direct sunlight for long periods, UV-resistant materials such as ASA are a better fit.
Which parts are made with PP (MJF / SAF)?
PP (MJF / SAF) is typically used in applications such as fluid and chemical containers, automotive parts, weldable parts.
Which material can be used instead of PP (MJF / SAF)?
Depending on the application, PP, PA12 (Nylon 12), PETG can be alternatives. You can see the differences in the comparison tables on the material pages.
Does TAİ Robotik produce with PP (MJF / SAF)?
For PP (MJF / SAF), send us your part's dimensions, quantity and operating conditions; we will determine the best production route and, if needed, an equivalent alternative together.
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