Ink set and recording method

Patent metadata

Field	Value
Publication number	US-10047238-B2
Application number	US-201615372744-A
Country	US
Kind code	B2
Filing date	Dec 8, 2016
Priority date	Dec 11, 2015
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

An ink set includes two ink compositions containing resin and wax separately, with the resin in one and the wax in the other, or an ink composition containing resin and wax together as well as a coagulant solution containing a coagulant for a component of the ink composition(s). The resin and the wax include a resin and a wax wherein the resin has higher aggregability than the wax.

First claim

What is claimed is:

1. An ink set comprising:
two ink compositions containing resin and wax separately, with the resin in one of the ink compositions and the wax in the other, or an ink composition containing resin and wax together; and
a coagulant solution containing a coagulant for a component of the ink composition or compositions,
wherein the resin has higher aggregability than the wax,
wherein the resin and the wax satisfy relational expression (1):
0.1 mL≤( W−J )≤3.0 mL  (1)

where J represents a minimum aggregation volume, mL, of the resin, and W represents a minimum aggregation volume, mL, of the wax.

2. The ink set according to claim 1 , wherein the ink composition or each of the ink compositions is a colored ink composition, which is an ink composition further containing a coloring material, or a clear ink composition.

3. The ink set according to claim 2 , wherein the ink set includes the two ink compositions containing resin and wax separately, the resin-containing ink composition is the colored ink composition, and the wax-containing ink composition is the clear ink composition.

4. The ink set according to claim 2 , wherein:
the ink set includes at least the colored ink composition; and
the coloring material in the colored ink composition contains at least one of a self-dispersible pigment and a resin-dispersed pigment.

5. The ink set according to claim 1 , wherein the ink composition or compositions contain two or more resins with different degrees of aggregability.

6. The ink set according to claim 1 , wherein the coagulant is an organic acid, a polyvalent metal salt, or a cationic compound.

7. The ink set according to claim 1 , wherein the ink composition or compositions are used by applying the ink composition or compositions to a recording medium through ink jetting.

8. The ink set according to claim 1 , wherein the ink composition or compositions contain the resin and the wax such that the resin and the wax each independently represent, on a solid basis, 0.5% by mass or more and 15% by mass or less of a total amount of the ink composition or compositions.

9. The ink set according to claim 1 , wherein the resins in the ink composition or compositions have a higher weighted average aggregability than the waxes in the ink composition or compositions.

10. A recording method comprising applying the ink composition or compositions in an ink set according to claim 1 to a substrate and applying the coagulant solution in the ink set to the substrate.

11. A recording method comprising applying the ink composition or compositions in an ink set according to claim 2 to a substrate and applying the coagulant solution in the ink set to the substrate.

12. A recording method comprising applying the ink composition or compositions in an ink set according to claim 3 to a substrate and applying the coagulant solution in the ink set to the substrate.

13. A recording method comprising applying the ink composition or compositions in an ink set according to claim 4 to a substrate and applying the coagulant solution in the ink set to the substrate.

14. A recording method comprising applying the ink composition or compositions in an ink set according to claim 5 to a substrate and applying the coagulant solution in the ink set to the substrate.

15. A recording method comprising applying the ink composition or compositions in an ink set according to claim 6 to a substrate and applying the coagulant solution in the ink set to the substrate.

16. A recording method comprising applying the ink composition or compositions in an ink set according to claim 7 to a substrate and applying the coagulant solution in the ink set to the substrate.

17. The recording method according to claim 10 , wherein the ink compositions include an ink composition containing wax and an ink composition containing resin, the resin having higher aggregability than the wax.

18. The recording method according to claim 17 , wherein the application of the ink composition or compositions is a wet-on-wet application process.

Assignees

• Seiko Epson Corp

Inventors

• Matsuzaki Akiko
• Kagata Takayoshi

Classifications

• C09D11/40

  Ink-sets specially adapted for multi-colour inkjet printing · CPC title

• C09D11/03

  characterised by features other than the chemical nature of the binder · CPC title

• C09D11/12

  based on waxes or bitumen · CPC title

• C09D11/322

  Pigment inks · CPC title

• C09D11/54 Primary

  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 title