Polypropylene (PP)
A versatile, lightweight polymer with outstanding chemical resistance and near-zero moisture absorption. PP is used for fluid-handling parts, automotive components, and packaging applications where PA12's moisture sensitivity is a limitation.
About Polypropylene (PP)
Polypropylene is one of the most widely used plastics globally, but has only recently become reliably printable via SLS and MJF. Its key advantage over PA12 is near-zero moisture absorption (0.03% vs 1.5%), which ensures dimensional stability in humid environments and eliminates the need for dry storage.
PP also offers superior chemical resistance to acids, bases, and organic solvents, making it the preferred material for fluid-handling components, chemical processing equipment, and packaging applications.
Typical Applications
- Fluid-handling manifolds and connectors
- Chemical-resistant housings
- Packaging prototypes and production parts
- Automotive interior components
- Living hinges with high cycle life
Engineering Considerations
- Lower stiffness and strength than PA12 — not for high-load structural parts
- Difficult to bond/glue — limited adhesive options
- Warping tendency during SLS — requires careful thermal management
- Fewer provider options compared to PA12 SLS/MJF