Ink set and recording method

Patent metadata

Field	Value
Publication number	US-10385228-B2
Application number	US-201815882483-A
Country	US
Kind code	B2
Filing date	Jan 29, 2018
Priority date	Mar 31, 2017
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

An ink set of the present teaching includes a water-based ink for ink-jet recording and a fixing agent. The water-based ink for ink-jet recording contains water and at least one of a direct dye and an acid dye, and the fixing agent contains a cationic compound represented by Formula (1):

wherein in Formula (1):
R 1 to R 4 are hydrocarbon groups each having 1 to 20 carbon atoms, and are identical with each other or different from each other; and X − is an anion.

First claim

What is claimed is:

1. An ink set comprising:
a water-based ink for ink-jet recording containing water and at least one of a direct dye and an acid dye; and
a fixing agent containing a cationic compound represented by Formula (1):

wherein in Formula (1):
R 1 to R 4 are hydrocarbon groups each having 1 to 20 carbon atoms, and are identical with each other or different from each other;
X − is an anion; and
a ratio (C/D) of a blending amount (C) of the cationic compound in the fixing agent to a blending amount (D) of the at least one of the direct dye and the acid dye in the water-based ink is 0.2 to 2.5.

2. The ink set according to claim 1 , wherein in Formula (1):
R 1 to R 3 are alkyl groups each having 1 to 5 carbon atoms, and are identical with each other or different from each other;
R 4 is an alkyl group having 6 to 20 carbon atoms;
each of R 1 to R 4 is a substituted or unsubstituted alkyl group, and has a straight chain or a branched chain; and
X − is the anion.

3. The ink set according to claim 1 , wherein in Formula (1), X − is one selected from the group consisting of methylsulfate ion, ethylsulfate ion, sulfate ion, nitrate ion, acetate ion, dicarboxylic acid ion, tricarboxylic acid ion, and hydroxide ion.

4. The ink set according to claim 1 , wherein in Formula (1), X − is sulfate ion.

5. The ink set according to claim 1 , wherein in Formula (1), X − is halide ion.

6. The ink set according to claim 1 , wherein a blending amount of the cationic compound in the fixing agent is not less than 1% by weight.

7. The ink set according to claim 1 , wherein:
the fixing agent further contains water; and
a blending amount of water in the fixing agent is not less than 80% by weight.

8. The ink set according to claim 1 , wherein the fixing agent further contains polyhydric alcohol.

9. The ink set according to claim 1 , wherein the fixing agent further contains a penetrant of which a blending amount in the fixing agent is 0.4% by weight to 10% by weight.

10. The ink set according to claim 1 , wherein the fixing agent further contains glycol ether.

11. The ink set according to claim 1 , wherein the fixing agent further contains:
propylene glycol; and
triethylene glycol n-butyl ether.

12. The ink set according to claim 1 , wherein the fixing agent further contains a surfactant.

13. The ink set according to claim 12 , wherein a blending amount of the surfactant in the fixing agent is 0.2% by weight to 2% by weight.

14. The ink set according to claim 12 , wherein the surfactant is a nonionic surfactant.

15. The ink set according to claim 1 , wherein the fixing agent further contains:
propylene glycol; and an acetylene glycol-based nonionic surfactant represented by Formula (2):

wherein in Formula (2):
R 11 to R 14 are alkyl groups each having 1 to 5 carbon atoms, and are identical with each other or different from each other;
m and n are identical with each other or different from each other, and are numbers which fulfill m+n=1 to 15; and
each of R 11 to R 14 is a straight chain or a branched chain.

16. A recording method for performing recording on a recording medium by using an ink set comprising a water-based ink for ink-jet recording and a fixing agent, the recording method comprising:
applying the fixing agent to the recording medium in a case that the recording medium is a recording medium other than recording paper; and
discharging the water-based ink onto the recording medium by an ink-jet system, wherein:
the water-based ink contains a dye and water; and
the fixing agent contains a cationic compound represented by Formula (1):

wherein in Formula (1):
R 1 to R 4 are hydrocarbon groups each having 1 to 20 carbon atoms, and are identical with each other or different from each other;
X − is an anion; and
a ratio (C/D) of a blending amount (C) of the cationic compound in the fixing agent to a blending amount (D) of the at least one of the direct dye and the acid dye in the water-based ink is 0.2 to 2.5.

17. The recording method according to claim 16 , wherein the recording medium other than the recording paper is fabric.

18. The recording method according to claim 16 , wherein:
the recording method comprises the application of the fixing agent to the recording medium and the discharge of the water-based ink onto the recording medium by the ink-jet system which are performed in this order in a case that the recording medium is the recording medium other than the recording paper; and
the recording method further comprises heat-treating and drying the recording medium at a temperature of not more than 210° C. before the discharge of the water-based ink after the application of the fixing agent.

19. The recording method according to claim 16 , wherein the dye is at least one of a direct dye and an acid dye.

20. A recording method for performing recording on a recording medium by using an ink set comprising a water-based ink for ink-jet recording and a fixing agent, the recording method comprising:
applying the fixing agent to the recording medium in a case that the recording medium is a recording medium other than recording paper;
discharging the water-based ink onto the recording medium by an ink-jet system; and
determining whether a first recording mode or a second recording mode is to be executed;
in the first recording mode, the recording medium is the recording medium other than the recording paper, and the recording method comprises applying the fixing agent to the recording medium and discharging the water-based ink onto the recording medium by the ink-jet system; and
in the second recording mode, the recording medium is the recording paper, and the recording method comprises discharging the water-based ink onto the recording medium by the ink-jet system without applying the fixing agent to the recording medium; wherein:
the water-based ink contains a dye and water; and
the fixing agent contains a cationic compound represented by Formula (1):

wherein in Formula (1):
R 1 to R 4 are hydrocarbon groups each having 1 to 20 carbon atoms, and are identical with each other or different from each other; and
X − is an anion.

Assignees

• Brother Ind Ltd

Inventors

• Ito Shinpei
• Taga Yasuhiro

Classifications

• D06P5/00

  Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form · CPC title

• B41M5/0064

  on plastics, horn, rubber, or other organic polymers · CPC title

• D06P5/30

  Ink jet printing · CPC title

• C09D11/38

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• C09D11/328

  characterised by dyes · CPC title