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Polyjet (Objet)

What is Polyjet?

Polyjet, short for Polymer Jetting, is an inkjet process for 3d printing and was created by Objet Geometries around 1998. In 2011, Objet merged with Stratasys. Also known as Objet, Polyjet creates very smooth and accurate parts due to printing in very small layer sizes. The process also offers the widest range of materials from rigid to elastic. There are even materials that specialize in printing rapid molds and tools that are typically good for 10-100 parts depending on size, geometry and molding material.

Most Polyjet parts are used for fit and function prototypes, over-mold samples, full multi-colored marketing models and medical models. Movie effects, Medical development, Consumer Goods, Automotive and Electronic industries typically use Polyjet parts.

How does Polyjet work?

Polyjet creates solid 3D models by simultaneously jetting drops of photopolymer materials that solidify when exposed to UV light. This is repeated in microscopic layers over and over until the part and build are complete. Multiple materials can be jetted at the same time to create multi-material printed parts or multi-colored printed parts.

Polyjet Process

Polyjet Advantages

  • Highly Accurate
  • High Quality Finish with Fine Details
  • Ease of Finish and Paint
  • Print Multi-Colored Models in Same Print
  • Print in Dual Materials or Durometers to mimic Overmolded parts
  • Economy of Scale

Polyjet Best Uses

  • Fit Checks
  • Rapid Tooling
  • High Surface Finishes
  • Part Accuracy
  • Marketing Samples
  • Heat Resistance
  • Clear Finishes
  • Overmold Processing
  • Color Printing

Not sure which additive process is best for your application?
Download our Best Additive Uses Chart (pdf).

Polyjet Equipment

Polyjet Machine

Eden Machines

Eden printers have smaller build platforms of 10” x 10” x 8” (250mm x 250mm x 200mm) and build parts at layers of 0.0006” which allow for great detail, accuracy and finish. These machines can run 15 different materials including Vero Rigid, Polypropylene, Tango Elastic and High Heat.

Connex Machines

Connex printers have build platforms up to 20” x 15” x 8” (500mm x 380mm x 200mm) and build parts at layers of 0.0006” which allow for great detail, accuracy and finish. These machines can run many different materials including Vero Rigid in Color, Tango Elastic, Polypropylene, Clear, High Heat and Digital ABS.

Stratasys J750 Machine

J750 printers have large build platforms of 20” x 15” x 8” (500mm x 380mm x 200mm) and build parts at layers of 0.00055” which allow for great detail, accuracy and finish. These machines can up to 6 different materials at once to create prototypes in multiple colors with different textures, transparencies and durometers.

Polyjet Materials

There are many materials available. Here is a list of common materials:

  • Digital ABS
    • BEST for ACCURATE & TOUGH
    • White or Green ABS-like Material
    • Applications: Form, Fit and Function Prototyping and Rapid Tooling
  • Vero
    • BEST for ACCURATE & DETAIL & MULTI-COLOR PRINTS
    • Clear and Single or Multi-Color Printing
    • Applications: Marketing Models, Medical Models, Multi-Color Prints, Multi-Material Prints (with Tango Elastic), and Design Check Prototypes.
  • Tango
    • BEST for ELASTIC & OVERMOLD PROTOTYPES
    • Black Elastic in Soft Durometer from 20A-80A
    • Applications: Overmolds (with Vero materials), Gasket and Bellow Prototypes, Touch & Feel Prototypes.

Learn more about the materials available for Polyjet here (pdf).

Don’t see the materials you want to use? It may be available with another additive process.
Download our Materials Availability Chart (pdf).

Polyjet Finishes Available (*Standard*):

  • *Level 1 – Quick Finish = Support Removal Only*
  • Level 5 – Painted Finish = Sand/Remove/Fill All Build Lines, Primer and Paint/Mask/Texture as Needed (Show Quality Finish)
  • Supreme Clear = Clear Coat & Buffing

Design Guideline:

  • Minimum Wall Thickness = 0.030”
  • Minimum Features Size = 0.030”
  • Tolerances = +/- 0.005” for first inch then +/- 0.001” per inch thereafter
  • Inserts = Install in Post-Processing with Adhesives or Press-Fit
  • Holes = Build Holes & Threads into model for print and chase or ream in finishing
Polyjet Head Polyjet Lid Polyjet Part