IP Library › Granted Patent US 11,472,977
Granted Patent B2
US 11,472,977 · App. 16/519,362 · Granted Oct 18, 2022

Ink, inkjet recording method, inkjet recording apparatus, and recorded matter

Inventors: Masahiro Kido (Kanagawa, JP); Hidefumi Nagashima (Kanagawa, JP); Juichi Furukawa (Kanagawa, JP); Yuta Nakamura (Kanagawa, JP)
Assignee: Ricoh Company, Ltd.
C09D11/38C09D11/102C09D11/322B41M5/0011B41M5/0047B41M5/0064
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Quick Facts
Patent No.
US 11,472,977
App. No.
16/519,362
Granted
Oct 18, 2022
Kind
B2
Abstract

Provided is an ink containing water, a plurality of organic solvents, a color material, and resin particles, wherein the plurality of organic solvents contain at least one compound having a hydrogen bond term δH, which is a Hansen solubility parameter, of 4.1 MPa 1/2 or higher but 9.5 MPa 1/2 or lower and a boiling point of 170° C. or higher and at least one diol compound containing 3 or 4 carbon atoms.

Claims (37)

1. An inkjet recording method, comprising:

applying a white ink after performing recording over a transparent film,

wherein the white ink comprises water, a plurality of organic solvents, a color material, and resin particles, and

wherein the plurality of organic solvents comprises:

at least one first compound having a hydrogen bond term δH, which is a Hansen solubility parameter, of 4.1 MPa 1/2 or higher but 9.5 MPa 1/2 or lower and a boiling point of 170° C. or higher;

at least one diol compound having 3 or 4 carbon atoms; and

a second compound having an alkoxy group which is different from the at least one first compound, and which is not a polyvalent alcohol.

wherein a content of the at least one first compound is greater than or equal to 10% by mass but less than or equal to 60% by mass of a total content of the plurality of organic solvents in the white ink.

2. The inkjet recording method according to claim 1 ,

wherein a content of the at least one diol compound is greater than or equal to 5% by mass but less than or equal to 40% by mass of a total content of the plurality of organic solvents in the white ink.

3. The inkjet recording method according to claim 1 ,

wherein all of the plurality of organic solvents contained in the white ink have a boiling point of 150° C. or higher but 270° C. or lower.

4. The inkjet recording method according to claim 1 ,

wherein a content of the second compound is greater than or equal to 1% by mass but less than or equal to 10% by mass of a total content of the plurality of organic solvents in the white ink.

5. The inkjet recording method according to claim 4 ,

wherein the content of the second compound is greater than or equal to 2% by mass but less than or equal to 6% by mass of the total content of the plurality of organic solvents in the white ink.

6. The inkjet recording method according to claim 1 ,

wherein in the applying, the white ink is applied onto the transparent film such that the white ink coats at least a part of a recorded matter obtained by performing the recording over the transparent film.

7. The inkjet recording method according to claim 1 , further comprising:

recording a transparent film with a second ink,

wherein in the applying, the white ink is applied onto the transparent film such that the second ink coats at least a part of the white ink on the transparent film.

8. The inkjet recording method according to claim 1 , wherein the transparent film comprises a polyethylene terephthalate film.

9. The inkjet recording method according to claim 1 , wherein the second compound has a methoxy group as an alkoxy group.

10. An ink, comprising:

water;

a plurality of organic solvents;

a color material; and

resin particles,

wherein the plurality of organic solvents comprise:

at least one first compound having a hydrogen bond term δH, which is a Hansen solubility parameter, of 4.1 MPa 1/2 or higher but 9.5 MPa 1/2 or lower and a boiling point of 170° C. or higher;

at least one diol compound having 3 or 4 carbon atoms; and

a second compound having an alkoxy group which is different from the at least one first compound, and which is not a polyvalent alcohol,

wherein all of the plurality of organic solvents contained in the ink have a boiling point of 150° C. or higher but 270° C. or lower,

wherein a content of the at least one first compound is greater than or equal to 10% by mass but less than or equal to 60% by mass of a total content of the plurality of organic solvents in the ink,

wherein a content of the at least one diol compound is greater than or equal to 5% by mass but less than or equal to 40% by mass of a total content of the plurality of organic solvents in the ink, and

wherein a content of the second compound is greater than or equal to 2% by mass but less than or equal to 10% by mass of the total content of the plurality of organic solvents in the ink.

11. The ink of claim 7 , wherein the ink is a white ink and wherein the color material is a white pigment.

Priority Claims (2)
JP 2015-117636 · Jun 10, 2015 · national
JP 2016-006579 · Jan 15, 2016 · national
Continuity (2)
Continuation 15574217
Related Publication 20190345356A1 · Nov 14, 2019