Image forming method and ink set

Patent metadata

Field	Value
Publication number	US-12398286-B2
Application number	US-202318323676-A
Country	US
Kind code	B2
Filing date	May 25, 2023
Priority date	Jun 7, 2022
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

An image forming method includes: applying an ink containing a pigment and resin particles onto a fabric by an inkjet method; and applying a post-treatment liquid containing a lubricant onto the ink applied to the fabric in a wet-on-wet manner, wherein when a solubility parameter of a resin constituting the resin particles is represented by SP 1 (cal/cm 3 ) 1/2 and a solubility parameter of the lubricant is represented by SP 2 (cal/cm 3 ) 1/2 , 0.3≤SP 1 −SP 2 ≤0.8 is satisfied.

First claim

What is claimed is:

1. An image forming method comprising:
applying an ink containing a pigment and resin particles onto a fabric by an inkjet method; and
applying a post-treatment liquid containing a lubricant onto the ink applied to the fabric in a wet-on-wet manner, wherein
when a solubility parameter of a resin constituting the resin particles is represented by SP 1 (cal/cm 3 ) 1/2 and a solubility parameter of the lubricant is represented by SP 2 (cal/cm 3 ) 1/2 , 0.3≤SP 1 −SP 2 ≤0.8 is satisfied.

2. The image forming method according to claim 1 , wherein
the resin particles contain a (meth)acrylic resin.

3. The image forming method according to claim 2 , wherein
the (meth)acrylic resin further has a crosslinkable group, and
at least one of the ink and the post-treatment liquid contains a crosslinking agent that reacts with the crosslinkable group.

4. The image forming method according to claim 3 , wherein
a content mass of the crosslinking agent in the ink is larger than a content mass of the crosslinking agent in the post-treatment liquid.

5. The image forming method according to claim 1 , wherein
the lubricant contains a silicone-based resin.

6. The image forming method according to claim 5 , wherein
the silicone-based resin is a silicone acrylic copolymer.

7. The image forming method according to claim 1 , wherein
a surface tension of each of the ink and the post-treatment liquid at 25° C. is 36 to 50 mN/m.

8. The image forming method according to claim 1 , wherein
in a state where a surface temperature of the fabric is 40° C. or lower, a time from application of the ink to start of application of the post-treatment liquid is 0.1 to five seconds.

9. The image forming method according to claim 1 , wherein
the fabric contains a hydrophobic fiber and a hydrophilic fiber.

10. An ink set for inkjet textile printing, comprising:
an ink containing a pigment and resin particles; and
a post-treatment liquid containing a lubricant, wherein
when a solubility parameter of a resin constituting the resin particles is represented by SP 1 (cal/cm 3 ) 1/2 and a solubility parameter of the lubricant is represented by SP 2 (cal/cm 3 ) 1/2 , 0.3≤SP 1 −SP 2 ≤0.8 is satisfied, and
a surface tension of each of the ink and the post-treatment liquid at 25° C. is 36 to 50 mN/m.

11. The ink set according to claim 10 , wherein
the resin particles contain a (meth)acrylic resin, and
the lubricant contains a silicone acrylic copolymer.

12. The image forming method according to claim 1 , wherein the step of applying a post-treatment liquid containing a lubricant onto the ink applied to the fabric in a wet-on-wet manner includes applying the post-treatment liquid when the following is satisfied:
(an amount of liquid ink remaining without being dried when the post-treatment liquid is applied)/(the adhesion amount of the ink) is 0.4 to 1.0.

13. The image forming method according to claim 1 , wherein the lubricant of the post treatment liquid contains a silicone-based resin, and the post-treatment liquid further includes an acrylic resin.

Assignees

• Konica Minolta Inc

Inventors

• Nakamura Masaki
• Shiraishi Masaharu

Classifications

• D06P5/30 Primary

  Ink jet printing · CPC title

• D06P3/82

  Textiles which contain different kinds of fibres · CPC title

• B41J2/2107

  characterised by the ink properties (supplying ink in a solid state B41J2/17593) · CPC title

• B41J2/01

  Ink jet · CPC title

• B41J2/2114

  Ejecting specialized liquids, e.g. transparent or processing liquids (B41J2/211 takes precedence) · CPC title