Polyjet:
Durus (Polypropylene like)


Polyjet - Rigur simulated polypropylene - Snap fit case
Polyjet - Rigur simulated polypropylene - Snap fit
Polyjet - Durus Polypropylen aehnlich - Beispiel Brille
Polyjet - Rigur simulated polypropylene - high-resolution model

Simulated Polypropylene was created to enable the production of prototypes that simulate the mechanical properties of Polypropylene. Unlike direct printing of Polypropylene (e.g. by SLS or FDM), this Polyjet material enables high-resolution, high-accuracy 3D printed prototypes. The material is durable and is a perfect choice for demanding applications like living hinges or snap fits.



Overview

Icon Technology

Technology

Polyjet

Icon Colors

Colors

White

Icon Max. size

Max. size

342 x 342 x 200 mm

Icon Pricing

Cost

$$$
(High)

Icon Lead Time

Lead Time

2 – 5 business days

Icon Accuracy

Accuracy

± 0,15% with a lower limit of 0,2 mm


Material-Details


Click on the topics of your interest.

Polypropylene Prototypes

3D printing of Polypropylene remains a challenge, laser sintered or extruded (FDM-printed) Polypropylene have their limitations in terms of density (laser sintering), accuracy (FDM) and surface quality (both technologies). An excellent way to overcome these issues for prototyping is using Simulated Polypropylene, a material specifically created to mimic the mechanical properties of the ‘original’. The material is durable and can be used for typical polypropylene applications like living hinges, snap fits or all other parts, where flexibility is required.

Approximate price

  • Pricing for Polyjet is complex, for Simulated Polypropylene, please request a manual quote.

Pricing factors

  • Material changes: When changing a material on the machine, a significant amount of material is discarded by cleaning the print heads and pipes.
  • Material consumption: Polyjet is the 3D printing technology with the largest material cost among all plastics. Furthermore, for technological reasons, more material is used than the part requires, sometimes the material consumption is up to 8 times higher than the final part requires (e.g. 800 g material for a 100 g part).

Look & Feel

  • The surfaces are smooth, compared to most other 3D printing technologies. However, layer lines can be seen in z-axis, as well as in x-y axis. Only this technology has x-y lines, which are a result from the print head scraping some material from the surface while printing.
  • Surfaces without support material are glossy, surfaces with support material are rougher and somewhat dull.

Characteristics

  • Very flexible.
  • Water can cause warping of the material, contact with water should therefore be avoided.

Tensile
Strength

20-30 MPa

Elongation
at break

40 – 50%

Modulus
of Elasticity

1.000 – 1.200 MPa

Flexural
Strength

30-40 MPa


Vicat A

37 – 42°C

Shore
hardness

74 – 78D

Symbol wall thickness

Wall thickness
The minimum wall thickness should be no less than 0,7 mm.

Symbol cavities

Cavities
Cavities can be realized as long as there is a min. 10 mm diameter escape hole to remove excess material. The support is a waxy material which needs to be scraped of. If the escape hole is too small, we cannot access the cavity and support material will remain inside the cavity. Accordingly,  for larger cavities, leave larger escape holes.

Symbol clearance gap

Clearance Gap
In case your file contains several shells, make sure to keep a clearance gap of min. 0,5 mm between the shells, otherwise they could be fused together.

Symbol resolution

Resolution
The minimal details size should not be smaller than 0,5 mm. The detail resolution of the material is a little less than Vero, but outperforms most other rapid prototyping materials.

Symbol interlocking parts

Interlocking parts
Interlocking parts can be printed as long as there is a clearance gap of at least 0.5 mm and there is sufficient space to remove the support material.

Symbol Bounding Box

Bounding Box
The maximum size of the part cannot exceed 342 x 342 x 200 mm.

Standard Finishing

  • Remove support material

Optional Finishing

  • Sanding
  • Bead blasting
  • Coating

In Polyjet 3D printing a print head is suspended above a build platform. The print head contains several nozzles as well as a UV lamp. During printing, the print head will sweep over the platform, ejecting tiny drops of a light-curing polymer on to the printing platform, and then almost immediately curing it with UV light. The platform then lowers between 16-32 microns (depending on the machine and setting) and the next layer of polymer is applied to the already hardened previous layer. This process continues until the object is completely 3D-printed. Overhanging sections are stabilized during the print by support material, which need to be removed after the print is completed.

Multijet Modeling (aka Polyjet) Printing Process. Quelle: Youtube.com / 3D-Systems