Liquid electrostatic inks and methods of printing
AssigneeHewlett-Packard Development Company, L.P.
InventorsHodaya Keisar, Albert Teishev, Liora Damari, Tehila Ben-Ezra, Hanit Marom Tchaicheeyan
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Abstract
Here is described a liquid electrostatic ink composition comprising a pigment; a carrier liquid; a resin; a charge director; a fatty acid amide, and a polyalkylene wax. Methods of forming the liquid electrostatic ink compositions, and plastic substrates with the liquid electrostatic ink composition printed thereon, are also disclosed.
Claims9
A liquid electrostatic ink composition, comprising:
- a pigment;
- a carrier liquid;
- a resin;
- a charge director;
- erucamide is present in the liquid electrostatic ink composition in an amount ranging from about 0.2 wt. % to about 4 wt. %, wherein wt. % values refer to a weight-for-weight (w/w) percentage of the erucamide in solids of the liquid electrostatic ink composition;
- and
- a polyethylene wax is present in the electrostatic ink composition in an amount ranging from about 4 wt. % to about 6 wt. %, wherein the wt. % values refer to a w/w percentage of the polyethylene wax in the solids of the liquid electrostatic ink composition.
A method of producing a liquid electrostatic ink composition, the method comprising:
- grinding a mixture comprising a pigment, a resin, and a polyethylene wax in a carrier liquid;
- and
- mixing the carrier liquid with erucamide and a charge director to form the liquid electrostatic ink composition,
- wherein, after the mixing of the carrier liquid with the erucamide and the charge director, the erucamide is present in the liquid electrostatic ink composition in an amount ranging from about 0.2 wt. % to about 4 wt. %
- and the polyethylene wax is present in the liquid electrostatic ink composition in an amount ranging from about 4 wt. % to about 6 wt. %, and wherein wt. % values refer to a weight-for-weight (w/w) percentage of the erucamide and the polyethylene wax in solids of the liquid electrostatic ink composition.
A plastic substrate with an electrostatic ink printed thereon, the electrostatic ink comprising a pigment, a resin, a charge director, erucamide, and a polyethylene wax, wherein the erucamide is present in the electrostatic ink in an amount ranging from about 0.2 wt. % to about 4 wt. % and the polyethylene wax is present in the liquid electrostatic ink composition in an amount ranging from about 4 wt. % to about 6 wt. %, and wherein wt. % values refer to a weight-for-weight (w/w) percentage of the erucamide and the polyethylene wax in solids of the electrostatic ink.
Dependencies are inferred from the claim text.