Colorless digital primer for digital printing
AssigneeHewlett-Packard Indigo B.V.
InventorsHannoch Ron, Inna Tzomik, Daniel Skvirsky
Life of this patent
Estimating the term…
Abstract
A colorless digital primer for digital printing includes a colorless paste. The colorless paste includes a non-polar carrier fluid, and a resin swollen in the non-polar carrier fluid. The resin is present in the paste in an amount ranging from about 20% (w/w) to about 50% (w/w). A solid polar compound is dispersed in the resin. The solid polar compound is selected from the group consisting of a cellulose microcrystalline powder, dextrin, maltose monohydrate, polyacrylic acid, polyvinyl alcohol, a styrene maleic anhydride copolymer, a bismaleimide oligomer, sucrose, sucrose octaacetate, sucrose benzoate, and combinations thereof. The solid polar compound is present in an amount up to 60 wt. % of solids in the colorless paste.
Claims15
A digital method for priming a substrate for subsequently receiving liquid electrophotographic (LEP) ink, the digital method comprising:
- selecting a colorless primer, including:
- a resin swollen with a non-polar carrier fluid;
- a solid polar compound dispersed in the swollen resin, the solid polar compound being selected from the group consisting of a cellulose microcrystalline powder, dextrin, maltose monohydrate, polyacrylic acid, polyvinyl alcohol, a styrene maleic anhydride copolymer, a bismaleimide oligomer, sucrose, sucrose octaacetate, sucrose benzoate, and combinations thereof;
- a charge adjuvant;
- and
- additional non-polar carrier fluid present in an amount such that a total solids content of the colorless primer ranges from about 1% (w/w) to about 5% (w/w);
- and
- applying the colorless primer directly to a surface of the substrate.
A colorless digital primer, comprising:
- a colorless paste, including:
- a non-polar carrier fluid;
- and
- a resin swollen in the non-polar carrier fluid, the resin present in the paste in an amount ranging from about 20% (w/w) to about 50% (w/w);
- and
- a solid polar compound dispersed in the resin, the solid polar compound being selected from the group consisting of a cellulose microcrystalline powder, dextrin, maltose monohydrate, polyacrylic acid, polyvinyl alcohol, a styrene maleic anhydride copolymer, a bismaleimide oligomer, sucrose, sucrose octaacetate, sucrose benzoate, and combinations thereof, and the solid polar compound being present in an amount up to 60 wt. % of solids in the colorless paste.
A method of making a colorless digital primer, comprising:
- selecting a solid polar compound from the group consisting of a cellulose microcrystalline powder, dextrin, maltose monohydrate, polyacrylic acid, polyvinyl alcohol, a styrene maleic anhydride copolymer, a bismaleimide oligomer, sucrose, sucrose octaacetate, sucrose benzoate, and combinations thereof;
- adding the solid polar compound to a colorless paste including a non-polar carrier fluid and a resin;
- and
- grinding the solid polar compound and the colorless paste to disperse the solid polar compound in the resin of the colorless paste.
Dependencies are inferred from the claim text.