Ink jet recording method and ink jet recording device

• US 10,640,666 B2
• Filed: 03/07/2018
• Issued: 05/05/2020
• Est. Priority Date: 09/30/2015
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Makuta, Toshiyuki
• Primary Examiner(s): Nguyen, Lam S
• Application Number:
  US15/913,926
• Publication Number:
  US 20180194957A1
• Time in Patent Office: 790 Days
• Field of Search: 347102
• CPC Class Codes: B41J 11/002 Curing or drying the ink on the copy materials, e.g. by heating or irradiating
• CPC Class Codes: B41J 11/0021 using irradiation
• CPC Class Codes: B41M 5/0023 Digital printing methods characterised by the inks used inks per se C09D11/00
• CPC Class Codes: B41M 7/0081 using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
• CPC Class Codes: B41M 7/009 using thermal means, e.g. infrared radiation, heat
• CPC Class Codes: C09D 11/033 characterised by the solvent
• CPC Class Codes: C09D 11/037 characterised by the pigment
• CPC Class Codes: C09D 11/101 Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
• CPC Class Codes: C09D 11/322 Pigment inks
• CPC Class Codes: C09D 11/326 characterised by the pigment dispersant
• CPC Class Codes: C09D 11/36 based on non-aqueous solvents
• CPC Class Codes: C09D 11/38 characterised by non-macromolecular additives other than solvents, pigments or dyes

Abstract

An ink jet recording method includes, in order, a jetting step of jetting an ink including an organic solvent, an oligomer having an ethylenically unsaturated group, and a pigment, and not including a polymerization initiator or including a polymerization initiator at a content of more than 0% by mass and 0.1% by mass or less onto a base material using an ink jet head, a drying step of drying the ink by removing at least a part of the organic solvent in the jetted ink, and a curing step of curing the dried ink with an electron beam.

Claims

1. An ink jet recording method comprising, in order:

a jetting step of jetting an ink including an organic solvent, an oligomer having an ethylenically unsaturated group, and a pigment, and not including a polymerization initiator or including a polymerization initiator at a content of more than 0% by mass and 0.1% by mass or less onto a base material using an ink jet head;

a drying step of drying the ink by removing at least a part of the organic solvent in the jetted ink; and

a curing step of curing the dried ink with an electron beam under an inert gas atmosphere,

wherein the ink in the jetting step does not include an ethylenically unsaturated compound having a molecular weight of less than 1,000 or a content of an ethylenically unsaturated compound having a molecular weight of less than 1,000 is more than 0% by mass and 0.1% by mass or less with respect to a total mass of the ink.

2. The ink jet recording method according to claim 1,

wherein an acceleration voltage of the electron beam is 150 kV or less and an absorbed dose of the electron beam of the dried ink in the curing step is 30 kGy or less.

3. The ink jet recording method according to claim 1,

wherein a content of the oligomer having an ethylenically unsaturated group is 99% by mass or more with respect to a total mass of an ethylenically unsaturated compound in the ink in the jetting step.

4. The ink jet recording method according to claim 1,

wherein the organic solvent includes a carbonate compound.

5. The ink jet recording method according to claim 4,

wherein the organic solvent includes a glycol ether compound and a carbonate compound.

6. The ink jet recording method according to claim 1,

wherein the drying step is a step of performing heat drying.

7. The ink jet recording method according to claim 1,

wherein the ink in the jetting step does not include water or a content of water is more than 0% by mass and 5% by mass with respect to a total mass of the ink.

8. The ink jet recording method according to claim 1,

wherein the base material is transported at a speed of 5 m/min to 300 m/min.

9. The ink jet recording method according to claim 1,

wherein the oligomer having an ethylenically unsaturated group is selected from the group consisting of a urethane acrylate oligomer, a polyester acrylate oligomer, and an epoxy acrylate oligomer.

10. An ink jet recording device comprising:

a base material transporting device in which an ink jet head, drying means, and an electron beam source are sequentially arranged; and

an ink including an organic solvent, an oligomer having an ethylenically unsaturated group, and a pigment, and not including a polymerization initiator or including a polymerization initiator at a content of more than 0% by mass and 0.1% by mass or less,

wherein the ink does not include an ethylenically unsaturated compound having a molecular weight of less than 1,000 or a content of an ethylenically unsaturated compound having a molecular weight of less than 1,000 is more than 0% by mass and 0.1% by mass or less with respect to a total mass of the ink.

11. The ink jet recording device according to claim 10,

wherein an acceleration voltage of the electron beam in the electron beam source is 150 kV or lower, and the dried ink is curable at an absorbed dose of the electron beam of 30 kGy or less.

12. The ink jet recording device according to claim 10,

wherein a content of the oligomer having an ethylenically unsaturated group is 99% by mass or more with respect to a total mass of an ethylenically unsaturated compound in the ink.

13. The ink jet recording device according to claim 10,

wherein the organic solvent includes a carbonate compound.

14. The ink jet recording device according to claim 13,

wherein the organic solvent includes a glycol ether compound and a carbonate compound.

15. The ink jet recording device according to claim 10,

wherein the drying means has a heating dryer.

16. The ink jet recording device according to claim 10,

wherein the oligomer having an ethylenically unsaturated group is selected from the group consisting of a urethane acrylate oligomer, a polyester acrylate oligomer, and an epoxy acrylate oligomer.

17. An ink jet recording method comprising, in order:

a jetting step of jetting an ink including an organic solvent, an oligomer having an ethylenically unsaturated group and having a molecular weight of 1,000 or more, and a pigment, and not including a polymerization initiator or including a polymerization initiator at a content of more than 0% by mass and 0.1% by mass or less onto a base material using an ink jet head;

a drying step of drying the ink by removing at least a part of the organic solvent in the jetted ink; and

a curing step of curing the dried ink with an electron beam under an inert gas atmosphere,

wherein a content of the oligomer having an ethylenically unsaturated group and having a molecular weight of 1,000 or more is 99% by mass or more with respect to a total mass of ethylenically unsaturated compounds in the ink in the jetting step.

18. The ink jet recording method according to claim 17, wherein

the ink in the jetting step does not include water or a content of water is more than 0% by mass and 5% by mass with respect to a total mass of the ink.

19. The ink jet recording method according to claim 17, wherein

the base material is transported at a speed of 5 m/min to 300 m/min.

20. The ink jet recording method according to claim 17, wherein

the oligomer having an ethylenically unsaturated group is selected from the group consisting of a urethane acrylate oligomer, a polyester acrylate oligomer, and an epoxy acrylate oligomer.