Patent ID: 6133355
Filing Date: 2000-10-17
Classification: B29C,B33Y

Abstract:
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 .alpha.-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; andd) 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.degree. C.