MODIFIED RESINS GET THE DROP
Material jetting creates objects in a similar method to a two dimensional ink jet printer. The technique is particularly versatile: Multi-material and full-color printing is straightforward and widely used. Nanosilica particle filled resins made by Evonik significantly improve edge sharpness and accuracy.
Material jetting is just like an ink jet printer forming layers that are instantly UV-cured. Material jetting is the only additive manufacturing technology that can combine different print materials within the same 3d printed model in the same print job. However, as material must be deposited in drops, the number of materials available to use is limited. Polymers and waxes are most commonly used.
By printing different materials at the same time, mixed material properties can nevertheless be achieved. These range from rigid to rubber-like, from transparent to opaque or materials with ABS-simulating performance. Often a gel-like support material is required for successful printing of complicated geometries. It needs post-processing to be removed.
Material Jetting is ideal for creating realistic visual and haptic prototypes with very smooth surfaces that resemble injection molded parts. Casting patterns are produced with very good accuracy and surface finishes as well.
Boosting the performance of jetting materials
There are still open challenges in optimizing material properties, namely mechanical strength and surface characteristics.
Evonik manufactures nanosilica particles that, used in material jetting formulations, can significantly improve a wide range of properties of 3D printed products. NANOCRYL® optimizes the quality of acrylic resins. The nano-scale silica particles enable the production of 3D printed products with improved edge sharpness as well as fracture toughness.
NANOPOX® is used as a constituent in epoxy resins to enable superior mechanical properties of material jetting formulations. The surface-modified, agglomerate-free silica particles with a diameter of approx. 20 nm significantly reduce shrinkage resulting in improved edge sharpness and high accuracy of the printed products.