Aqueous ink for inkjet, inkjet recording method, inkjet recorded matter, and inkjet recording device

1. An aqueous ink for inkjet comprising:

water;

at least one hydrosoluble organic solvent each having a boiling point of 250° C. or lower;

vinyl polymer particles comprising a pigment; and

polycarbonate-based urethane resin particles,

wherein the aqueous ink for inkjet is used for an inkjet recording system including a heating step to heat recorded matter formed by the aqueous ink, at a heating temperature in a range from 40° C. to 120° C.

2. The aqueous ink for inkjet according to claim 1 , wherein the pigment is a white pigment.

3. The aqueous ink for inkjet according to claim 1 , further comprising an ultraviolet absorbent.

4. The aqueous ink for inkjet according to claim 1 , wherein the hydrosoluble organic solvent comprises at least one compound selected from the group consisting of 1,2-propane diol, 1,3-propane diol, 1,2-butane diol, 1,3-butane diol, and 2,3-butane diol.

5. The aqueous ink for inkjet according to claim 1 , wherein the vinyl polymer particles are synthesized from at least one of an acrylate having an arylalkyl group, an acrylate having an aryl group, a styrene-based macromer, or an alkyl methacrylate-based macromer.

6. Printed matter obtained by using the ink of claim 1 , comprising:

a substrate; and

a printed layer including

the at least one hydrosoluble organic solvent each having a boiling point of 250° C. or lower,

the vinyl polymer particles including a pigment; and

the polycarbonate-based urethane resin particles.

7. An inkjet recording device comprising:

a printing device to print an image on a recording medium by using the aqueous ink for inkjet of claim 1 to obtain recorded matter; and

a heating device to heat the recorded matter at a heating temperature in a range from 40° C. to 120° C.

8. The inkjet recording device according to claim 7 , wherein the ink used by the inkjet recording device to obtain the recorded matter further comprises an ultraviolet absorbent.

9. The inkjet recording device according to claim 7 , wherein the hydrosoluble organic solvent in the ink used by the inkjet recording device to obtain the recorded matter comprises at least one compound selected from the group consisting of 1,2-propane diol, 1,3-propane diol, 1,2-butane diol, 1,3-butane diol, and 2,3-butane diol.

10. The inkjet recording device according to claim 7 , wherein the vinyl polymer particles in the ink used by the inkjet recording device to obtain the recorded matter are synthesized from at least one of an acrylate having an arylalkyl group, an acrylate having an aryl group, a styrene-based macromer, or an alkyl methacrylate-based macromer.

11. The inkjet recording device according to claim 7 , wherein a minimal film-forming temperature of the polycarbonate-based urethane resin particles in the ink used by the inkjet recording device to obtain the recorded matter is 25 degrees C. or higher.

12. The inkjet recording device according to claim 7 , wherein a content rate of the polycarbonate-based urethane resin particles in the ink used by the inkjet recording device to obtain the recorded matter is 0.5-10 percent by mass.

13. The inkjet recording device according to claim 7 , wherein the ink used by the inkjet recording device to obtain the recorded matter comprises no hydrosoluble organic solvents having a boiling point higher than 250 degrees C.

14. The inkjet recording device according to claim 7 , wherein the ink used by the inkjet recording device to obtain the recorded matter further comprises one of acrylic resin particles, polyolefin resin particles, vinyl acetate resin particles, vinyl chloride resin particles, fluorine-containing resin particles, polyether resin particles, and polyester resin particles.

15. The inkjet recording device according to claim 7 , wherein the polycarbonate-based urethane resin particles in the ink used by the inkjet recording device to obtain the recorded matter has an average particle diameter of 10-350 nm.

16. The ink according to claim 1 , wherein a minimal film-forming temperature of the polycarbonate-based urethane resin particles is 25 degrees C. or higher.

17. The ink according to claim 1 , wherein a content rate of the polycarbonate-based urethane resin particles in the ink is 0.5-10 percent by mass.

18. The ink according to claim 1 , comprising no hydrosoluble organic solvents having a boiling point higher than 250 degrees C.

19. The ink according to claim 1 , further comprising one of acrylic resin particles, polyolefin resin particles, vinyl acetate resin particles, vinyl chloride resin particles, fluorine-containing resin particles, polyether resin particles, and polyester resin particles.

20. The ink according to claim 1 , wherein the polycarbonate-based urethane resin particles has an average particle diameter of 10-350 nm.