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US 2017/0247553 A1Published application
3-dimensional printing
AssigneeHewlett-Packard Development Company, L.P.
InventorsSivapackia Ganapathiappan, Howard S. Tom, Lihua Zhao, Krzysztof Nauka, Yan Zhao, Hou T. Ng, Keshava A. Prasad
Life of this patent
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Abstract
The present disclosure is drawn to coalescent inks and material sets for 3D printing. The coalescent ink can include a water-soluble near-infrared dye having a peak absorption wavelength from 800 nm to 1400 nm. The coalescent ink can also contain water.
Claims15
A coalescent ink for 3-dimensionoal printing, comprising:
- a water-soluble near-infrared dye having a peak absorption wavelength from 800 nm to 1400 nm, wherein the near-infrared dye is selected from the group consisting of aminium dyes, tetraaryldiamine dyes, cyanine dyes, dithiolene dyes, and combinations thereof;
- a colorant imparting a visible color to the coalescent ink;
- and
- water.
1 more element
A material set for 3-dimensional powder bed printing, comprising:
- a coalescent ink comprising water and a water-soluble near-infrared dye having a peak absorption wavelength from 800 nm to 1400 nm;
- and
- a particulate polymer formulated to coalesce when contacted by the coalescent ink and irradiated by a near-infrared energy emitting the peak absorption wavelength.
A method for forming a 3-dimensional printed part, comprising:
- preheating a bed of particulate polymer to about 10° C. to about 30° C. below a melting point or softening point of the particulate polymer;
- jetting a coalescent ink onto a portion of the bed of particulate polymer, wherein the coalescent ink comprises:
- a water-soluble near-infrared dye having a peak absorption wavelength between 800 nm and 1400 nm, and
- water;
- irradiating the bed of particulate polymer with a fusing lamp configured to emit a wavelength from 800 nm to 1400 nm to cause the portion of the bed of particulate polymer to fuse;
- adding a layer of particulate polymer to the portion after fusing;
- and
- repeating the jetting, irradiating, and adding steps to form a part.
5 more elements
Dependencies are inferred from the claim text.