What is PolyJet?

Tip: PolyJet printing is comparable to SLA (stereolithography).
FastProtos.com uses Objet's PolyJet™ 3D printing technology, which creates highly detailed parts suitable for form, fit and function.

PolyJet printing is a rapid prototyping process that uses additive manufacturing. The printers have two or more jetting heads (one set for the model and one set for the support material) that spray outlines of the part, layer by layer.

The liquids used are photopolymers, which get cured nearly instantly by a UV lamp within the printer, creating a solid, plastic-like model that is precise and accurate.
The support material is a gel-like substance, which is easily washed away.
The model has a smooth finish and is ready for sanding, painting, drilling, or tapping.

Material Properties are below the video.

Below is a YouTube video of an Objet PolyJet printer in action:

Printing Capabilities   Material Properties   PolyJet vs Others
Our Printing Capabilities:
  • Max Model Size: 294 x 192 x 148 mm (11.5 x 7.5 x 5.8 inches)
  • Colors: White (possibly other colors in the future)
  • Min Wall Thickness: 0.6 mm (0.024 inches)
  • Resolution: 600 x 600 x 900 dpi
  • Layers: 28 microns (0.0011 inches)
  • Accuracy: 0.1-0.2 mm for the overall model
PolyJet Material Properties - VeroWhitePlus:
  • Color: White
  • Tensile Strength 7,250-9,450 psi
  • Modulus of Elasticity: 290,000-435,000 psi
  • Elongation at Break: 10-25%
  • Flexural Strength: 11,000-16,000 psi
  • Flexural Modulus: 320,000-465,000 psi
  • Izod Notched Impact: 0.375-0.562 ft lb/in
  • HDT at 0.45 MPa: 113-122° F
  • Tg: 126-129° F
  • Density: 1.17-1.18 g/cm3
  • Data Sheet: PDF for VeroWhite FullCure830
PolyJet versus other 3D processes:
  • FDM - Fused Deposition Modeling:
    Strengths: True ABS plastic; strong; handles high temps well; low cost
    Drawbacks: Not as precise; stair-stepping "ridges"
  • PolyJet:
    Strengths: High precision and accuracy; smooth finish; low to high cost
    Drawbacks: Not true plastic; doesn't handle high heat well
  • SLA - Stereolithography
    Strengths: Very popular; precise; water resistant; low to high cost
    Drawbacks: Not true plastic
  • SLS - Selective Laser Sintering
    Strengths: Durable; handles chemicals and higher temps; medium cost
    Drawbacks: Rougher finish
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