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Use and production of coated filaments for extrusion-based 3D printing processes

  • US 9,193,110 B2
  • Filed: 11/06/2013
  • Issued: 11/24/2015
  • Est. Priority Date: 11/09/2012
  • Status: Active Grant
First Claim
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1. A process for extrusion-based 3D printing, the process comprising steps of:

  • applying a coating composition onto a filament, wherein the filament is comprised of a thermoplastic polymer and the coating composition is comprised of at least one material selected from the group consisting of an additive, a pigment, and an ink;

    fixing the applied coating composition on the filament to obtain a coated filament, the coated filament being comprised of a filament portion and a coating portion on a surface of the filament portion;

    conveying the coated filament to a printing head;

    melting the filament portion of the coated filament in the printing head to obtain a coated melted filament, the coated melted filament being comprised of a melted filament and a coating layer on a surface of the melted filament; and

    extruding a plurality of strands of the coated melted filament onto a substrate to form a three dimensional object, whereinthe melted filament and the coating layer do not substantially mix during the extrusion of the coated melted filament; and

    the coating layer remains on the surface of the melted filament during the extrusion of the plurality of strands of the coated melted filament.

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