Granted Patent B2

US 12,209,193 · App. 18/075,649 · Granted Jan 28, 2025

Inventors: Hirohiko Yuasa (Kanagawa, JP); Daiji Okamura (Tokyo, JP); Satoru Kobayashi (Kanagawa, JP)

Assignee: Canon Kabushiki Kaisha

C09D11/328B41M7/009

Abstract

Claims (33)

1. An ink jet recording method, comprising: a recording step of ejecting an aqueous ink from a recording head of an ink jet system and applying the aqueous ink to a recording medium; and a heating step of heating the recording medium applied with the aqueous ink at a temperature T H (° C.),

wherein the aqueous ink comprises a first resin particle and a second resin particle,

wherein the first resin particle is dyed with at least one fluorescent dye selected from the group consisting of a basic dye, a disperse dye and an oil-soluble dye, and comprises a cyano group-containing unit,

wherein the second resin particle does not include any coloring material therein,

wherein the temperature T H (° C.) is less than a glass transition temperature Tg 1 (° C.) of the first resin particle and more than a glass transition temperature Tg 2 (° C.) of the second resin particle, and

wherein a specific gravity (g/cm 3 ) of the second resin particle is less than a specific gravity (g/cm 3 ) of the first resin particle.

2. The ink jet recording method according to claim 1 , wherein the temperature T H (° C.) is more than the glass transition temperature Tg 2 (° C.) of the second resin particle by 10° C. or more.

3. The ink jet recording method according to claim 1 , wherein the temperature T H (° C.) is less than the glass transition temperature Tg 1 (° C.) of the first resin particle by 10° C. or more.

4. The ink jet recording method according to claim 1 , wherein a temperature T 1 (° C.) of the aqueous ink applied to the recording medium, is less than the glass transition temperature Tg 2 (° C.) of the second resin particle.

5. The ink jet recording method according to claim 1 , wherein the second resin particle comprises at least one of a cyano group-containing unit and a unit derived from (meth) acrylic acid ester.

6. The ink jet recording method according to claim 1 , wherein a cumulative 50% particle diameter in volume-based particle size distribution of the second resin particle is smaller than a cumulative 50% particle diameter in volume-based particle size distribution of the first resin particle.

7. The ink jet recording method according to claim 1 , wherein a mass ratio of a content (% by mass) of the second resin particle in the aqueous ink to a content (% by mass) of the first resin particle is 0.3 times or more to 3.0 times or less.

8. The ink jet recording method according to claim 1 , wherein a proportion (% by mass) of the cyano group-containing unit constituting the first resin particle is 15.0% by mass or more.

9. The ink jet recording method according to claim 1 , wherein a proportion (% by mass) of the fluorescent dye included in the first resin particle is 1.0% by mass or more to 8.0% by mass or less.

10. An ink jet recording apparatus comprising: an aqueous ink; a recording head of an ink jet system that ejects the aqueous ink and applies the aqueous ink to a recording medium; and a heating unit that heats the recording medium applied with the aqueous ink at a temperature T H (° C.),

wherein the aqueous ink comprises a first resin particle and a second resin particle,

wherein the first resin particle is dyed with at least one fluorescent dye selected from the group consisting of a basic dye, a disperse dye and an oil-soluble dye, and comprises a cyano group-containing unit,

wherein the second resin particle does not include any coloring material therein,

wherein the temperature T H (° C.) is less than a glass transition temperature Tg 1 (° C.) of the first resin particle and more than a glass transition temperature Tg 2 (° C.) of the second resin particle, and

wherein a specific gravity (g/cm 3 ) of the second resin particle is less than a specific gravity (g/cm 3 ) of the first resin particle.

11. An ink jet recording method, comprising: a recording step of ejecting an aqueous ink from a recording head of an ink jet system and applying the aqueous ink to a recording medium; and a heating step of heating the recording medium applied with the aqueous ink at a temperature T H (° C.),

wherein the aqueous ink comprises a first resin particle and a second resin particle,

wherein the first resin particle is dyed with at least one fluorescent dye selected from the group consisting of a basic dye, a disperse dye and an oil-soluble dye, and comprises a cyano group-containing unit,

wherein the second resin particle does not include any coloring material therein,

wherein the temperature T H (° C.) is less than a glass transition temperature Tg 1 (° C.) of the first resin particle and more than a glass transition temperature Tg 2 (° C.) of the second resin particle, and

wherein a specific gravity (g/cm 3 ) of the first resin particle is 1.20 g/cm 3 or less.

12. An ink jet recording apparatus comprising: an aqueous ink; a recording head of an ink jet system that ejects the aqueous ink and applies the aqueous ink to a recording medium;

and a heating unit that heats the recording medium applied with the aqueous ink at a temperature T H (° C.),

wherein the aqueous ink comprises a first resin particle and a second resin particle,

wherein the first resin particle is dyed with at least one fluorescent dye selected from the group consisting of a basic dye, a disperse dye and an oil-soluble dye, and comprises a cyano group-containing unit,

wherein the second resin particle does not include any coloring material therein,

wherein the temperature T H (° C.) is less than a glass transition temperature Tg 1 (° C.) of the first resin particle and more than a glass transition temperature Tg 2 (° C.) of the second resin particle, and

wherein a specific gravity (g/cm 3 ) of the first resin particle is 1.20 g/cm 3 or less.

Assignments (1)

Priority Claims (2)

Continuity (1)

References Cited (40)