Ink, ink container, and inkjet recording device

Patent metadata

Field	Value
Publication number	US-10414932-B2
Application number	US-201615278917-A
Country	US
Kind code	B2
Filing date	Sep 28, 2016
Priority date	Oct 20, 2015
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

Ink includes water, a pigment, an organic solvent including glycol ether, and a surfactant including a silicone-based surfactant and a salt of sulfo succinic acid dialkyl ester. As measured by maximum bubble pressure technique at 23 degrees C., the dynamic surface tension of the ink at 15 msec is not greater than 31 mN/m and the difference between the dynamic surface tension of the ink at 15 msec and the dynamic surface tension of the ink at 1,500 msec is not greater than 4.0 mN/m.

First claim

What is claimed is:

1. An ink, comprising:
water;
a pigment;
a non-silicone-based defoaming agent;
an organic solvent comprising glycol ether; and
a surfactant comprising a silicone-based surfactant and a salt of sulfo succinic acid dialkyl ester, wherein the salt of sulfo succinic acid dialkyl ester is di-2-ethylhexyl sodium sulfo succinate,
wherein as measured by maximum bubble pressure technique at 23 degrees C., a difference between the dynamic surface tension of the ink at 15 msec and a dynamic surface tension of the ink at 1,500 msec is not greater than 4.0 mN/m and the dynamic surface tension of the ink at 15 msec is not greater than 31 mN/m, and
wherein
an amount of glycol ether is from 1.0 to 3.0% by mass of the ink, and
the glycol ether is selected from the group consisting of diethylene glycol monobutylether, triethylene glycol monomethyl ether, and diethylene glycol monohexyl ether.

2. The ink according to claim 1 , further comprising glycerin, wherein the glycerin is present in an amount of 3.0-10.0 percent by mass of the ink.

3. The ink according to claim 1 , wherein the salt of sulfo succinic acid dialkyl ester is present in an amount of 0.1-2.0 percent by mass of the ink.

4. An ink container, comprising:
the ink according to claim 1 .

5. An inkjet recording device comprising:
the ink container of claim 4 ; and
a discharging device configured to discharge ink supplied from the ink container of claim 4 .

6. The ink according to claim 1 , wherein the amount of glycol ether is from 1.0 to 2.0% by mass of the ink.

7. An ink, comprising:
water;
a pigment;
an organic solvent comprising glycol ether; and
a surfactant comprising a silicone-based surfactant and a salt of sulfo succinic acid dialkyl ester, wherein the salt of sulfo succinic acid dialkyl ester is di-2-ethylhexyl sodium sulfo succinate,
wherein as measured by maximum bubble pressure technique at 23 degrees C., a difference between the dynamic surface tension of the ink at 15 msec and a dynamic surface tension of the ink at 1,500 msec is not greater than 4.0 mN/m and the dynamic surface tension of the ink at 15 msec is not greater than 31 mN/m, and
wherein
an amount of glycol ether is from 1.0 to 3.0% by mass of the ink, and
the glycol ether comprises diethylene glycol monohexyl ether.

8. The ink according to claim 7 , further comprising glycerin, wherein the glycerin is present in an amount of 3.0-10.0 percent by mass of the ink.

9. The ink according to claim 7 , wherein the salt of sulfo succinic acid dialkyl ester is present in an amount of 0.1-2.0 percent by mass of the ink.

10. An ink container, comprising the ink according to claim 7 .

11. An inkjet recording device comprising:
the ink container of claim 10 ; and
a discharging device configured to discharge ink supplied from the ink container of claim 10 .

12. An ink, comprising:
water;
a pigment;
an organic solvent comprising glycol ether; and
a surfactant comprising a silicone-based surfactant and a salt of sulfo succinic acid dialkyl ester, wherein the salt of sulfo succinic acid dialkyl ester is di-2-ethylhexyl sodium sulfo succinate,
wherein as measured by maximum bubble pressure technique at 23 degrees C., a difference between the dynamic surface tension of the ink at 15 msec and a dynamic surface tension of the ink at 1,500 msec is not greater than 4.0 mN/m and the dynamic surface tension of the ink at 15 msec is not greater than 31 mN/m, and
wherein
an amount of glycol ether is from 1.0 to 3.0% by mass of the ink, and
the glycol ether is selected from the group consisting of diethylene glycol monobutylether, triethylene glycol monomethyl ether, and diethylene glycol monohexyl ether, and
a proportion in mass ratio of the glycol ether in the ink is 1.0-3.0 when a total proportion in mass ratio of the silicone-based surfactant and the salt of sulfo succinic acid dialkyl ester in the ink is defined as 1.0.

13. The ink according to claim 12 , further comprising glycerin, wherein the glycerin is present in an amount of 3.0-10.0 percent by mass of the ink.

14. The ink according to claim 12 , wherein the salt of sulfo succinic acid dialkyl ester is present in an amount of 0.1-2.0 percent by mass of the ink.

15. An ink container, comprising the ink according to claim 12 .

16. An inkjet recording device comprising:
the ink container of claim 15 ; and
a discharging device configured to discharge ink supplied from the ink container of claim 15 .

Assignees

• Umemura Kazuhiko
• Fushimi Hiroyuki
• Moriya Yoshihiro
• Aruga Tamotsu
• Ricoh Co Ltd

Inventors

• Umemura Kazuhiko
• Fushimi Hiroyuki
• Moriya Yoshihiro
• Aruga Tamotsu

Classifications

• B41J2/17553

  Outer structure · CPC title

• C09D103/08

  Ethers · CPC title

• C09D11/38 Primary

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• B41J2/17523

  Ink connection · CPC title

• C09D11/322

  Pigment inks · CPC title