Printing method and set of processing fluid and ink

Patent metadata

Field	Value
Publication number	US-10647129-B2
Application number	US-201815913959-A
Country	US
Kind code	B2
Filing date	Mar 7, 2018
Priority date	Mar 16, 2017
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A printing method includes applying a processing fluid to a recording medium and applying an ink to the recording medium, wherein the processing fluid contains a first nonionic resin including the following structure unit a-1, the first nonionic resin having a glass transition temperature of 15 degrees C. or lower, wherein the ink contains a second nonionic resin including the following structure unit a-1 and a coloring material

First claim

What is claimed is:

1. A set comprising:
a processing fluid comprising a first nonionic resin and a cationic resin, the first nonionic resin having a glass transition temperature of 15 degrees C. or lower; and
an ink comprising a second nonionic resin and a coloring material,
wherein both of the first nonionic resin and the second nonionic resin have a structure unit a-1:

the cationic resin has a structure unit of chemical formula 1 or 2:

wherein, X − represents an anionic counter ion and n represents 0 or an integer of from 1 to 13.

2. A printing method with the set according to claim 1 , the method comprising:
applying the processing fluid to the recording medium; and
applying the ink to the recording medium.

3. The printing method according to claim 2 , wherein the second nonionic resin has a glass transition temperature of 20 degrees C. or lower.

4. The printing method according to claim 2 , wherein the processing fluid further comprises a multivalent metal salt.

5. The print method according to claim 4 , wherein the multivalent metal salt is at least one member selected from the group consisting of a calcium salt, magnesium salt, and a nickel salt.

6. The printing method according to claim 2 , wherein the ink is applied to an area to which the processing fluid has been applied.

7. The set according to claim 1 , wherein the first nonionic resin has a glass transition temperature not higher than a glass transition temperature of the second nonionic resin.

8. The set according to claim 1 , wherein the second nonionic resin has a glass transition temperature of 20 degrees C. or lower.

9. The set according to claim 1 , wherein the processing fluid further comprises a multivalent metal salt.

10. The set according to claim 9 , wherein the multivalent metal salt is at least one member selected from the group consisting of a calcium salt, magnesium salt, and a nickel salt.

11. The set according to claim 9 , wherein the multivalent metal salt has a concentration of from 0.05 to 0.5 mol/kg.

12. The set according to claim 1 , wherein the first nonionic resin accounts for 0.5 to 15 percent by mass of a total amount of the processing fluid.

13. The set according to claim 1 , wherein the cationic resin accounts for 1 to 50 percent by mass of a total amount of the processing fluid.

14. The set according to claim 1 , wherein the second nonionic resin accounts for 0.5 to 20 percent by mass of a total amount of the ink.

15. The set according to claim 1 , wherein the ink and the processing fluid further comprise 1,3-butane diol.

16. The set according to claim 15 , wherein the ink and the processing fluid further comprise 1,2-octane diol.

17. The set according to claim 1 , wherein the processing fluid further comprises a third nonionic resin having a structure unit a-2:

18. The set according to claim 1 , wherein the processing fluid further comprises polyoxyalkylene alkyl ether.

19. The set according to claim 1 , wherein the cationic resin has the structure unit of chemical formula 1.

20. The set according to claim 1 , wherein the ink comprises a fluorochemical surfactant.

Assignees

• Hanazawa Atsufumi
• Goto Hiroshi
• Maekawa Tsutomu
• Watarai Yukitaka
• Katsuragi Koji
• Nakagawa Tomohiro
• Ricoh Co Ltd

Inventors

• Hanazawa Atsufumi
• Gotou Hiroshi
• Maekawa Tsutomu
• Watarai Yukitaka
• Katsuragi Koji
• Nakagawa Tomohiro

Classifications

• C09D11/52 Primary

  Electrically conductive inks · CPC title

• C09D11/54

  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 title

• C08G18/3203

  Polyhydroxy compounds · CPC title

• C08G18/758

  containing two or more cycloaliphatic rings · CPC title

• C08G18/8064

  with monohydroxy compounds · CPC title