Inkjet ink set

• US 9,822,276 B2
• Filed: 08/14/2013
• Issued: 11/21/2017
• Est. Priority Date: 08/14/2013
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Visnyak, Elizabeth Ann, Emamjomeh, Ali, Sarkisian, George, Ingle, David Michael, Guzman, Minedys Macias
• Primary Examiner(s): FIDLER, SHELBY LEE
• Application Number:
  US14/900,380
• Publication Number:
  US 20160152858A1
• Time in Patent Office: 1,560 Days
• CPC Class Codes: B41J 2/2107 characterised by the ink properties supplying ink in a solid state B41J2/17593
• CPC Class Codes: B41M 5/0011 Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating after-treatment of prints B41M7/00; printers for treating or overcoating copy materials before, during or after printing B41J11/0015
• CPC Class Codes: B41M 7/00 After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock pre-treatment or treatment during printing B41M5/0011; printers for treating or overcoating copy materials before, during or after printing B41J11/0015
• CPC Class Codes: C09D 11/12 based on waxes or bitumen
• CPC Class Codes: C09D 11/322 Pigment inks
• CPC Class Codes: C09D 11/324 containing carbon black
• 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
• CPC Class Codes: C09D 133/062 Copolymers with monomers not covered by C09D133/06

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 wax and a binder present in the post-treatment fluid in a range of about 10 weight percent to about 30 weight percent.

Claims

1. An ink set, comprising:

a first inkjet ink cartridge containing a pre-treatment fixing fluid including a metal salt;

at least one second inkjet ink cartridge containing an ink including an ink colorant and an ink vehicle, the ink being devoid of any binder; and

a third inkjet ink cartridge containing a post-treatment fluid including a wax and a latex binder selected from the group consisting of an acrylic polymer, a styrene acrylic copolymer, a vinyl acetate polymer, a polyester polymer, a vinylidene chloride polymer, a butadiene polymer, a styrene-butadiene copolymer, an acrylonitrile-butadiene copolymer, and mixtures thereof, the latex binder having a weight average molecular weight ranging from about 100,000 to about 500,000, the latex binder being present in the post-treatment fluid in a range of about 20 weight percent to about 30 weight percent;

wherein the ink set is adapted for separate inkjetting of the pre-treatment fixing fluid, the ink, and the post-treatment fluid onto a medium.

2. The ink set of claim 1, wherein the wax is present in the post-treatment fluid in a range of about 0.5 weight percent to about 2.5 weight percent.

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

4. The ink set of claim 1, wherein the ink colorant is a pigment.

5. The ink set of claim 1, wherein the ink set includes a plurality of other inks, each including an ink colorant and an ink vehicle.

6. The ink set of claim 1, wherein the metal salt is present in the pre-treatment fixing fluid in a range of about 3 weight percent to about 10 weight percent, and the wax is present in the post-treatment fluid in a range of about 0.5 weight percent to about 2.5 weight percent.

7. The ink set of claim 1 wherein the latex binder has an average particle diameter ranging from about 10 nm to about 500 nm.

8. The ink set of claim 1 wherein the pre-treatment fixing fluid is devoid of any binder.

9. A method of producing images on media using an ink set adapted for separate inkjetting of a pre-treatment fixing fluid, an ink, and a post-treatment fluid, the method comprising:

separately inkjetting onto the media, in order, the pre-treatment fixing fluid contained in a first inkjet ink cartridge and including a metal salt, the ink contained in at least one second inkjet ink cartridge, including an ink colorant and an ink vehicle, and being devoid of any binder, and the post-treatment fluid contained in a third inkjet ink cartridge and including a wax and a latex binder selected from the group consisting of an acrylic polymer, a styrene acrylic copolymer, a vinyl acetate polymer, a polyester polymer, a vinylidene chloride polymer, a butadiene polymer, a styrene-butadiene copolymer, an acrylonitrile-butadiene copolymer, and mixtures thereof, the latex binder having a weight average molecular weight ranging from about 100,000 to about 500,000, and the latex binder being present in the post-treatment fluid in a range of about 20 weight percent to about 30 weight percent.

10. The method of claim 9, wherein said inkjetting the post-treatment fluid comprises inkjetting the post-treatment fluid after the pre-treatment fixing fluid and the ink dry.

11. The method of claim 10, further comprising performing a drying operation after said inkjetting the ink, before said inkjetting the post-treatment fluid.

12. The method of claim 9, wherein said inkjetting the post-treatment fluid is performed before the ink and the pre-treatment fixing fluid substantially dry.

13. The method of claim 9, wherein said inkjetting the pre-treatment fixing fluid comprises inkjetting the pre-treatment fixing fluid by the first inkjet ink cartridge, wherein said inkjetting the ink comprises inkjetting the ink by the at least one second inkjet ink cartridge, and wherein said inkjetting the post-treatment fluid comprises inkjetting the post-treatment by the third inkjet ink cartridge.