Process for energy-pulse-induced transfer printing
AssigneesIvoclar Vivadent AG, IO Tech Group Ltd.
InventorsLorenz Josef Bonderer, Jürgen Rudolf Laubersheimer, Wolfgang Josef Wachter, Michael Zenou
Life of this patent
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Abstract
A material for use as support material for energy-pulse-induced transfer printing, which contains (a) at least one energy transformation component, (b) at least one volume expansion component and (c) at least one binder and which has a viscosity at 25° C. of from 0.2 Pas to 1000 Pas and a surface tension at 25° C. of from 20 to 150 mN/m. The invention furthermore relates to a process for producing three-dimensional objects using the support material.
Claims14
A process for the additive manufacture of three-dimensional objects, comprising the following steps:
- (1) laminar application of a support/construction material to a carrier in a defined layer thickness,
- (2) transfer of a portion of the support/construction material from the carrier substrate (donor) onto a receiver substrate (acceptor) by a local, site-selective input of an energy pulse,
- (3) solidification of the support/construction material on the receiver substrate,
- (4) repetition of steps (1)-(3) until the desired object has been constructed,
- (5) optionally removal of the support material and/or cleaning of the object,
- wherein the support material comprises
- 0.05 to 30 wt.-% of at least one energy transformation component (a), which comprises an inorganic or organic dye or a pigment,
- 5 to 60 wt.-% of at least one volume expansion component (b), which comprises a substance with a boiling point of from 95 to 200° C.,
- 35 to 94.95 wt.-% of at least one binder (c), which comprises a polymer, wax and/or a non-ionic surfactant, wherein the polymer, wax and/or non-ionic surfactant is solid at <40° C.,
- in each case relative to the total mass of the material, and
- wherein the material has a viscosity at 25° C. of from 0.2 Pas to 1000 Pas and a surface tension at 25° C. of from 20 to 150 mN/m.
A process of using a material comprising
- 0.05 to 30 wt.-% of at least one energy transformation component (a), which comprises an inorganic or organic dye or a pigment,
- 5 to 60 wt.-% of at least one volume expansion component (b), which comprises a substance with a boiling point of from 95 to 200° C.,
- 35 to 94.95 wt.-% of at least one binder (c), which comprises a polymer, wax and/or a non-ionic surfactant, wherein the polymer, wax and/or non-ionic surfactant is solid at <40° C.,
- in each case relative to the total mass of the material, and wherein the material has a viscosity at 25° C. of from 0.2 Pas to 1000 Pas and a surface tension at 25° C. of from 20 to 150 mN/m,
- as a support material for producing three-dimensional objects by energy-pulse-induced transfer printing (LIFT).
Dependencies are inferred from the claim text.