Non-aqueous inkjet printing method

Patent metadata

Field	Value
Publication number	US-9624402-B2
Application number	US-201414574816-A
Country	US
Kind code	B2
Filing date	Dec 18, 2014
Priority date	Dec 27, 2013
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

The method is a non-aqueous inkjet printing method including the steps of: ejecting droplets of a non-aqueous pigment ink containing at least a pigment and a non-aqueous solvent onto a surface of a printing medium to form dots composed of the non-aqueous pigment ink, and then ejecting droplets of a non-aqueous post-treatment liquid containing at least silica and an organic solvent toward the printing medium so that the droplets overlap with the dots composed of the non-aqueous pigment ink, wherein either of the non-aqueous pigment ink and the post-treatment liquid contains a water-soluble resin having an amino group.

First claim

What is claimed is:

1. A non-aqueous inkjet printing method comprising:
ejecting first droplets of a non-aqueous pigment ink containing at least a pigment and a non-aqueous solvent onto a surface of a printing medium to form dots composed of the non-aqueous pigment ink, and then
ejecting second droplets of a non-aqueous post-treatment liquid containing at least silica and an organic solvent toward the printing medium so that the second droplets overlap with the dots composed of the non-aqueous pigment ink,
wherein either of the non-aqueous pigment ink and the post-treatment liquid contains a water-soluble resin having an amino group;
wherein the non-aqueous solvent consists of a petroleum-based hydrocarbon solvent.

2. The non-aqueous inkjet printing method according to claim 1 , wherein the organic solvent in the post-treatment liquid contains a glycol ether-based solvent.

3. The non-aqueous inkjet printing method according to claim 1 , wherein
the dots composed of the non-aqueous pigment ink are formed on the surface of the printing medium in plural rows, and
the post-treatment liquid is ejected so that the second droplets of the post-treatment liquid land on the respective dots of the non-aqueous pigment ink.

4. The non-aqueous inkjet printing method according to claim 2 , wherein
the dots composed of the non-aqueous pigment ink are formed on the surface of the printing medium in plural rows, and
the post-treatment liquid is ejected so that the second droplets of the post-treatment liquid land on the respective dots of the non-aqueous pigment ink.

5. The non-aqueous inkjet printing method according to claim 1 , wherein
the dots composed of the non-aqueous pigment ink are formed on the surface of the printing medium in plural rows having gaps between adjacent dots, and
the post-treatment liquid is ejected so that the second droplets of the post-treatment liquid land on the gaps between the adjacent dots of the non-aqueous pigment ink.

6. The non-aqueous inkjet printing method according to claim 2 , wherein
the dots composed of the non-aqueous pigment ink are formed on the surface of the printing medium in plural rows having gaps between adjacent dots, and
the post-treatment liquid is ejected so that the second droplets of the post-treatment liquid land on the gaps between the adjacent dots of the non-aqueous pigment ink.

7. The non-aqueous inkjet printing method according to claim 1 , wherein the non-aqueous pigment ink contains the water-soluble resin having an amino group.

8. The non-aqueous inkjet printing method according to claim 2 , wherein the non-aqueous pigment ink contains the water-soluble resin having an amino group.

9. The non-aqueous inkjet printing method according to claim 1 , wherein the post-treatment liquid contains the water-soluble resin having an amino group.

10. The non-aqueous inkjet printing method according to claim 2 , wherein the post-treatment liquid contains the water-soluble resin having an amino group.

11. The non-aqueous inkjet printing method according to claim 1 , wherein a ratio of the non-aqueous pigment ink droplets to the droplets of the post-treatment liquid is from 95:5 to 50:50 by a volume ratio.

12. The non-aqueous inkjet printing method according to claim 1 , wherein the water-soluble resin having an amino group comprises at least one selected from the group consisting of polyethyleneimine, a derivative of polyethyleneimine, polyvinylamine, a derivative of polyvinylamine, polyvinylpyridine, a derivative of polyvinylpyridine, and a dimethylamine ammonia epichlorohydrin resin.

13. The non-aqueous inkjet printing method according to claim 1 , wherein the pigment contained in the non-aqueous pigment ink comprises at least one selected from the group consisting of organic pigment, carbon black, and titanium oxide.

14. The non-aqueous inkjet printing method according to claim 1 , wherein the pigment comprises at least one selected from the group consisting of organic pigment and carbon black.

15. The non-aqueous inkjet printing method according to claim 1 , wherein the non-aqueous pigment ink further comprises a polar organic solvent.

Assignees

• Riso Kagaku Corp

Inventors

• Shimura Shinichiro
• Okawa Teruaki
• Endo Toshihiro
• Hosoya Tetsuo
• Torita Naoyuki
• Sugiura Hikaru
• Hayashi Hiroshi

Classifications

• C09D179/02 Primary

  Polyamines · 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

• C09D11/322

  Pigment inks · CPC title

• C09D11/36

  based on non-aqueous solvents · CPC title

• C08K3/04

  Carbon · CPC title