HP Polypropylene (PP)
HP Multi Jet Fusion
HP Polypropylene is ideal for producing chemically resistant functional parts with low moisture absorbtion. This versatile material is ideal for piping or fluid systems and containers, and is used in a wide variety of automotive, industrial, consumer goods and medical applications.
Minimum lead time
10 business days
+/- 0.3% with a lower limit of +/- 0.3 mm
Maximum build size
380 x 285 x 380 mm (14.9" x 11.2" x 14.9")
About HP Polypropylene (PP)
Polypropylene (PP) is one of the most widely used injection molded materials in the world, but it has only recently become available as a viable 3D printing option. Polypropylene is commonly used in applications that require excellent chemical resistance combined with low moisture absorbtion, great flexibility and impact resistance. Amongst commercial plastics, PP has a very low density, allowing for the production of lightweight parts. Automotive, consumer goods, industrial and medical are key sectors that heavily use PP already. Living hinges and watertight applications are good fits for the material, as well as applications requiring electrical resistance.
Strong, high-density parts with near-isometric properties on x-y and z axes
Functional parts with fine detail and dimensional accuracy
Excellent chemical resistance to oils, greases, alphalitic hydrocarbons, and alkalies
Water- and air-tight without further treatment
Low moisture absorbtion
Low cost per part
Functional prototyping and small- to medium-run manufacturing
Car interior parts
Fluid and HVAC systems
Tubes, pipes, reservoirs
Multi-purpose industrial goods
Max build volume
380 x 284 x 380 mm (15 x 11.2 x 15")
Min wall thickness
Min slit between walls
Min hole diameter at 1 mm thickness
Min printable details
Min emboss / deboss
Min depth/height for emboss/deboss
9 pt (3.2 mm)
Consider hollowing or adding internal lattice structure to large solid pieces to improve accuracy and minimize cost.
See full design guidelines for additional considerations, including clearance, functional assemblies, interlocking parts, hollowing and lattice structures, ducts, threads, how to minimize the risk of warpage, bonding parts, and more.
Hinges, sockets, and linked parts can be integrated into the design.
+/- 0.7% (minimum of +/- 0.3 mm)
Density of parts
1600 MPa (XY), 1600 MPa (Z)
30 MPa (XY), 30 MPa (Z)
Elongation at break
20% (XY), 18% (Z)
Certifications & Data Sheets
Certifications: 9 REACH, RoHS, PAHs, ISO 10993 and US FDA Intact Skin Surface Devices Statements
After the part has been printed and cleaned it has a powdery gray look and feel. This finish is best suited for functional prototypes and non-visible parts.
Parts are submerged in a hot dye bath containing dye pigment. This gives a smooth, consistent finish with no loss of dimensional accuracy.
Chemical Vapor Smoothing
This process uses a chemical vapor that smooths the surface of the part, giving a look and feel comparable to injection molding. Best for consumer-facing parts.