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

3D printing technology
Dimensional accuracy

+/- 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")

Ordering information

Instant quoting is not available for this material at this time. To request pricing and make an order, please submit a manual quote or contact us for more information.

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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. 

Key Benefits

  • 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

  • UV resistant

  • Low moisture absorbtion

  • Low cost per part

Applications

  • Functional prototyping and small- to medium-run manufacturing

  • Complex assemblies

  • Car interior parts

  • Fluid and HVAC systems

  • Tubes, pipes, reservoirs

  • Medical devices

  • Orthotics

  • Multi-purpose industrial goods

Design guidelines​

Max build volume

380 x 284 x 380 mm (15 x 11.2 x 15")

Min wall thickness

2 mm

Min clearance

0.6 mm

Min slit between walls

0.6 mm 

Min hole diameter at 1 mm thickness

0.6 mm

Min printable details

0.3 mm

Min emboss / deboss

0.6 mm

Min depth/height for emboss/deboss

1 mm

Min font

9 pt (3.2 mm)

 

Design considerations​

  • 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.

View full design guidelines

Technical Specifications

Accuracy

+/- 0.7% (minimum of +/- 0.3 mm)

Layer thickness

0.08 mm

Density of parts

0.89 g/cm3

Tensile modulus

1600 MPa (XY), 1600 MPa (Z)

Tensile strength

 30 MPa (XY), 30 MPa (Z)

Elongation at break

20% (XY), 18% (Z)

Melting point

187 C

Certifications & Data Sheets

Available finishes

HP Multi Jet Fusion raw finish
Raw (gray)

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.

HP Multi Jtet Fusion - black, bead blasted
Black Dye

Parts are submerged in a hot dye bath containing dye pigment. This gives a smooth, consistent finish with no loss of dimensional accuracy.

HP Multi Jet Fusion chemical smoothing
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.

Get your parts into production today