Ink jet recording method and ink jet recording apparatus

Patent metadata

Field	Value
Publication number	US-11420463-B2
Application number	US-202016944590-A
Country	US
Kind code	B2
Filing date	Jul 31, 2020
Priority date	Aug 1, 2019
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

Provided is an ink jet recording method using an ink jet recording apparatus having an ink jet head, the method including: a colored ink adhesion step of discharging an aqueous colored ink composition containing a coloring material from an ink jet head to adhere to a recording medium; and a clear ink adhesion step of discharging an aqueous clear ink composition from an ink jet head to adhere to the recording medium, in which the aqueous clear ink composition contains wax particles, the ink jet recording apparatus has a circulation path for circulating the aqueous clear ink composition, and in the clear ink adhesion step, the aqueous clear ink composition circulated in the circulation path is discharged.

First claim

What is claimed is:

1. An ink jet recording method that uses an ink jet recording apparatus having an ink jet head, the method comprising:
a colored ink adhesion step of discharging an aqueous colored ink composition containing a coloring material from an ink jet head to adhere to a recording medium; and
a clear ink adhesion step of discharging an aqueous clear ink composition from the ink jet head to adhere to the recording medium,
wherein the aqueous clear ink composition contains wax particles in an amount that ranges between 0.5 to 10% by mass and contains resin particles in an amount that ranges between 1.0 to 15% by mass,
the ink jet head has a pressure chamber, a circulation path for circulating the aqueous clear ink composition, a nozzle, a sub-tank, and a liquid container, the aqueous clear ink composition returning to the sub-tank through the circulation path and being re-supplied to the ink jet head, and the liquid container supplying the aqueous clear ink composition to the sub-tank,
the pressure chamber is configured to be supplied with the aqueous clear ink composition and configured to pressurize the aqueous clear ink composition to discharge the aqueous clear ink composition from the nozzle, and the circulation path is formed at a position downstream from the pressure chamber and upstream from the nozzle,
the ink jet recording apparatus circulates the aqueous clear ink composition during standby, and
in the clear ink adhesion step, the aqueous clear ink composition circulated in the circulation path is discharged.

2. The ink jet recording method according to claim 1 , wherein
the aqueous clear ink composition contains 1 to 10% by mass the wax particles.

3. The ink jet recording method according to claim 1 , wherein
the wax particles have an average particle diameter of 30 nm to 500 nm.

4. The ink jet recording method according to claim 1 , wherein
the aqueous clear ink composition contains resin particles in an amount that ranges between 2.0 to 15% by mass.

5. The ink jet recording method according to claim 1 , further comprising:
adhering a treatment liquid containing a coagulant to the recording medium.

6. The ink jet recording method according to claim 1 , wherein
the aqueous clear ink composition contains a nitrogen-containing solvent.

7. The ink jet recording method according to claim 1 , wherein
the recording medium is a low-absorptive recording medium or a non-absorptive recording medium.

8. The ink jet recording method according to claim 1 , wherein
the circulation path includes at least one of a circulation return path for returning the aqueous clear ink composition from the ink jet head and a circulation return path for returning the aqueous clear ink composition from an ink flow path for supplying the aqueous clear ink composition to the ink jet head.

9. The ink jet recording method according to claim 1 , wherein
a gas-liquid interface is generated in a circulation path for circulating the aqueous clear ink composition.

10. The ink jet recording method according to claim wherein
a circulation amount of the aqueous clear ink composition in the circulation return path during the standby is 0.5 g/min to 12 g/min per one ink jet head.

11. The ink jet recording method according to claim 1 , wherein
the ink jet recording apparatus has the circulation path for circulating the aqueous colored ink composition, and
in the colored ink adhesion step, the colored ink composition circulated in the circulation path during recording is discharged.

12. An ink jet recording apparatus that performs recording by the ink jet recording method according to claim 1 , the apparatus comprising:
a first ink jet head that discharges an aqueous colored ink composition containing a coloring material to adhere to a recording medium;
a second ink jet head that discharges an aqueous clear ink composition to adhere to the recording medium; and
a circulation path for circulating the aqueous clear ink composition.

Assignees

• Seiko Epson Corp

Inventors

• Okuda Ippei
• Watanabe Tadashi

Classifications

• B41J2/2114

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

• B41J2/01 Primary

  Ink jet · CPC title

• B41J2/175 Primary

  Ink supply systems {; Circuit parts therefor} · CPC title

• B41J2002/14411

  Groove in the nozzle plate · CPC title

• B41J2202/12

  with ink circulating through the whole print head · CPC title