Inkjet recording method

Patent metadata

Field	Value
Publication number	US-12428781-B2
Application number	US-202318461145-A
Country	US
Kind code	B2
Filing date	Sep 5, 2023
Priority date	Sep 9, 2022
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

An inkjet recording method is provided that includes the following steps: applying a pretreatment liquid to a fabric; applying a first white ink by an inkjet method and a wet on wet method onto an application region of the pretreatment liquid obtained in the applying of the pretreatment liquid, to form an image; applying a second white ink by an inkjet method and a wet on wet method onto the image formed in the applying of the first white ink; and applying a color ink by an inkjet method and a wet on wet method onto an image obtained in the applying of the second white ink.

First claim

The invention claimed is:

1. An inkjet recording method comprising:
applying a pretreatment liquid to a fabric;
applying a first white ink by an inkjet method and a wet on wet method onto an application region of the pretreatment liquid obtained in the applying of the pretreatment liquid, to form an image;
applying a second white ink by an inkjet method and a wet on wet method onto the image formed in the applying of the first white ink; and
applying a color ink by an inkjet method and a wet on wet method onto an image obtained in the applying of the second white ink;
wherein an application amount of the pretreatment liquid is 5 mg/cm 2 or more and 40 mg/cm 2 or less, and
a ratio of the application amount of the pretreatment liquid per unit area to an application amount of the first white ink is 1.0 or more and less than 7.5.

2. The inkjet recording method according to claim 1 , wherein the pretreatment liquid has a pH of less than 6.5.

3. The inkjet recording method according to claim 1 , wherein a ratio of an application amount of the second white ink per unit area to an application amount of the first white ink per unit area is 0.5 or more and 1.0 or less.

4. The inkjet recording method according to claim 1 , wherein the first white ink comprises 1 mass % or more and 6 mass % or less of a polymer having a carbodiimide group or an oxazoline group.

5. The inkjet recording method according to claim 1 , wherein the second white ink comprises a resin having a carboxy group.

6. The inkjet recording method according to claim 1 , wherein the first white ink has a pH of 8.0 or more and 10.0 or less.

7. The inkjet recording method according to claim 1 , wherein the second white ink contains 10 mass % or more and 14 mass % or less of a urethane resin.

8. The inkjet recording method according to claim 1 , wherein a dried ink film of the second white ink has a glass transition temperature of 30° C. or lower.

Assignees

• Kuronuma Makoto
• Kobashi Toshiyuki
• Hirade Tomohiro
• Ricoh Co Ltd

Inventors

• Kuronuma Makoto
• Kobashi Toshiyuki
• Hirade Tomohiro

Classifications

• D06P5/002

  Locally enhancing dye affinity of a textile material by chemical means · CPC title

• D06P1/5278

  Polyamides; Polyimides; Polylactames; Polyalkyleneimines · 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

• C09D11/30

  Inkjet printing inks · CPC title

• C09D11/102

  containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds · CPC title