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Selective deposition modeling materials and method

  • US 6,133,355 A
  • Filed: 06/12/1997
  • Issued: 10/17/2000
  • Est. Priority Date: 09/27/1995
  • Status: Expired due to Term
First Claim
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1. A material for use in selective deposition modeling by jetting from an ink jet print head to build a three-dimensional object in layerwise fashion comprising a mixture of:

  • a) between about 20 and 45% by weight of paraffin wax;

    b) between about 20 and 50% by weight of a hydrocarbon resin, wherein the hydrocarbon resin is a copolymer of α

    -methylstyrene and vinyl toluene;

    c) between about 10 and 30% by weight of microcrystalline wax selected from the group consisting of a microcrystalline ester wax, a soft microcrystalline wax, a hard microcrystalline wax and mixtures thereof; and

    d) between about 2 and 5% by weight of an ethylene-vinyl acetate copolymer,wherein each % by weight is based on the total weight of the mixture, and wherein the material has a viscosity between about 7 and about 30 centipoise at at least one temperature between about 125 and about 135°

    C.

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