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Three dimensional printing material system and method using plasticizer-assisted sintering

  • US 8,506,862 B2
  • Filed: 02/02/2011
  • Issued: 08/13/2013
  • Est. Priority Date: 02/22/2007
  • Status: Active Grant
First Claim
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1. A method for forming a final article by three dimensional printing, the method comprising the steps of:

  • providing a particulate material comprising a plurality of adjacent particles, the particulate material comprising an aqueous-insoluble thermoplastic;

    applying to at least some of the plurality of particles an aqueous fluid binder in an amount sufficient to bond those particles together to define an intermediate article; and

    thereafter, performing a post-processing treatment comprising immersing the intermediate article in a liquid infiltrant medium comprising a plasticizer to define the final article, wherein a composition of the liquid infiltrant medium is different from a composition of the aqueous fluid binder and wherein the liquid infiltrant medium comprises 0-99.99% by weight hydroxylated hydrocarbon, 0-99.99% by weight a solid wax, no more than 99.99% by weight a plasticizer, and 0.01-5% by weight a stabilizer.

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