INKJET INK SET

• US 20160185992A1
• Filed: 09/23/2013
• Published: 06/30/2016
• Est. Priority Date: 09/23/2013
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Sarkisian, George, Ingle, David Michael
• Granted Patent: US 9,873,812 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B41M 5/0017 Application of ink-fixing material, e.g. mordant, precipitating agent, on the substrate prior to printing, e.g. by ink-jet printing, coating or spraying
• CPC Class Codes: B41M 7/0018 using ink-fixing material, e.g. mordant, precipitating agent, after printing, e.g. by ink-jet printing, coating or spraying
• CPC Class Codes: C09D 11/38 characterised by non-macromolecular additives other than solvents, pigments or dyes
• CPC Class Codes: C09D 11/40 Ink-sets specially adapted for multi-colour inkjet printing
• CPC Class Codes: C09D 11/54 Inks based on two liquids, one liquid being the ink, the other liquid being a reaction solution, a fixer or a treatment solution for the ink

Abstract

Examples provide inkjet ink sets and related methods. An ink set may include a pre-treatment fixing fluid, an ink, and a post-treatment fluid including a binder and a surfactant having a hydrophilic-lipophilic balance (HLB) value of greater than about 12.

Claims

1. An ink set, comprising:

a pre-treatment fixing fluid including a metal salt;

an ink including an ink colorant and an ink vehicle; and

a post-treatment fluid including a binder and a surfactant having a hydrophilic-lipophilic balance (HLB) value of greater than about 12.

2. The ink set of claim 1, wherein the HLB value is about 16.

3. The ink set of claim 1, wherein the surfactant is non-reactive to the metal salt.

4. The ink set of claim 1, wherein surfactant is present in the post-printing treatment fluid in a range of about 0.1 weight percent to about 5.0 weight percent.

5. The ink set of claim 1, wherein the binder is present in the post-treatment fluid in a range of about 6 weight percent to about 30 weight percent.

6. The ink set of claim 1, wherein the binder is present in the post-treatment fluid in a range of about 20 weight percent to about 30 weight percent.

7. The ink set of claim 6, wherein the binder is a latex is selected from a group consisting of acrylic polymers or copolymers, vinyl acetate polymers or copolymers, polyester polymers or copolymers, vinylidene chloride polymers or copolymers, butadiene polymers or copolymers, styrene-butadiene copolymers, acrylonitrile-butadiene copolymers, and mixtures thereof.

8. The ink set of claim 1, wherein the ink colorant is a pigment, and the metal salt includes a polyvalent metal cation selected from a group consisting of Ca²⁺, Mg²⁺, or Zn²⁺, and mixtures thereof.

9. The ink set of claim 1, further comprising a first inkjet ink cartridge containing the pre-treatment fixing fluid, at least one second inkjet ink cartridge containing the ink, and a third inkjet ink cartridge containing the post-treatment fluid.

10. A post-treatment fluid for inkjet printing, comprising:

a binder; and

a surfactant having a hydrophilic-lipophilic balance (HLB) value of greater than about 12.

11. The post-treatment fluid of claim 10, wherein the binder is present in the post-treatment fluid in a range of about 6 weight percent to about 30 weight percent, and the surfactant is present in the post-treatment fluid in a range of about 0.1 weight percent to about 5.0 weight percent.

13. The method of claim 11, wherein said inkjetting the post-treatment fluid comprises inkjetting the post-treatment fluid after the pre-treatment fixing fluid and the ink dry.

14. The method of claim 11, wherein said inkjetting the post-treatment fluid is performed before the ink and the pre-treatment fixing fluid substantially dry.

15. The method of claim 11, wherein said inkjetting the pre-treatment fixing fluid comprises inkjetting the pre-treatment fixing fluid by a first inkjet ink cartridge, wherein said inkjetting the ink comprises inkjetting the ink by a second inkjet ink cartridge, and wherein said inkjetting the post-treatment fluid comprises inkjetting the post-treatment by a third inkjet ink cartridge.

12. A method of producing images on media, comprising:

separately inkjetting onto the media, in order, a pre-treatment fixing fluid, an ink, and a post-treatment fluid including a binder and a surfactant having a hydrophilic-lipophilic balance (HLB) value of greater than about 12.