Ink jet recording method, ultraviolet-ray curable ink, and ink jet recording apparatus

Patent metadata

Field	Value
Publication number	US-11077677-B2
Application number	US-202016822986-A
Country	US
Kind code	B2
Filing date	Mar 18, 2020
Priority date	Apr 25, 2012
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

An ink jet recording method includes ejecting an ultraviolet-ray curable ink of which a viscosity at 28° C. is 8 mPa·s or more from a head to a recording medium, and curing the ultraviolet-ray curable ink attached to the recording medium, wherein, in the ejecting of the ultraviolet-ray curable ink, the ultraviolet-ray curable ink is heated such that a temperature of the ejected ultraviolet-ray curable ink becomes 28° C. to 40° C., and a viscosity of the ultraviolet-ray curable ink at the temperature is 15 mPa·s or less.

First claim

What is claimed is:

1. An ink jet recording method comprising:
ejecting an ultraviolet-ray curable ink of which a viscosity at 28° C. is 8 mPa·s or more from a head to a recording medium; and
curing the ultraviolet-ray curable ink attached to the recording medium, wherein the ultraviolet-ray curable ink is heated such that a temperature of the ejected ultraviolet-ray curable ink is in a range of 28° C. to 39° C., and a viscosity of the ultraviolet-ray curable ink at the heated temperature of the ejected ultraviolet-ray curable ink is in a range of 15 mPa·s or less,
wherein a light source used for the curing of the ultraviolet-ray curable ink is a light emitting diode, and
wherein the light emitting diode applies ultraviolet rays which have a peak intensity of 800 mW/cm 2 or more.

2. The ink jet recording method according to claim 1 , wherein recording is performed using a line type ink jet recording apparatus which includes a line head with a length equal to or more than a length corresponding to a width of a recording medium as the head.

3. The ink jet recording method according to claim 1 , wherein recording is performed using an ink jet recording apparatus in which at least a part of an ink path for supplying the ultraviolet-ray curable ink from an ink container to the head is an ink circulation path for circulating the ultraviolet-ray curable ink.

4. The ink jet recording method according to claim 3 , wherein an ink inflow amount of the ultraviolet-ray curable ink which is supplied from the ink circulation path to the head is twice or more the maximum ink ejection amount in which the ultraviolet-ray curable ink is ejected from the head.

5. The ink jet recording method according to claim 3 , wherein a heating mechanism which heats the ultraviolet-ray curable ink is provided at a position other than a position which is connected to at least the head in the ink circulation path.

6. The ink jet recording method according to claim 3 , wherein there are a plurality of heads to which the ultraviolet-ray curable ink is supplied from the ink circulation path, and the ultraviolet-ray curable ink is ejected from the plurality of heads.

7. The ink jet recording method according to claim 1 , wherein the ultraviolet-ray curable ink includes (meth)acrylic acid esters containing a vinyl ether group expressed in the following Formula (I):
CH 2 ═CR 1 —COOR 2 —O—CH═CH—R 3   (I)

wherein R 1 indicates a hydrogen atom or a methyl group, R 2 indicates a divalent organic residue having 2 to 20 carbon atoms, and R 3 indicates a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms.

8. The ink jet recording method according to claim 7 , wherein the ultraviolet-ray curable ink further includes a monofunctional (meth)acrylate (here, excluding (meth)acrylic acid esters containing a vinyl ether group expressed in Formula (I)).

9. The ink jet recording method according to claim 1 , wherein the light emitting diode applies ultraviolet rays which have a peak intensity of 1000 mW/cm 2 or more.

10. The ink jet recording method according to claim 1 , wherein an epoxy resin is used for the head.

11. The ink jet recording method according to claim 1 , wherein the light emitting diode applies ultraviolet rays which have a peak intensity of 800 to 3000 mW/cm 2 .

12. The ink jet recording method according to claim 1 , wherein the light emitting diode applies ultraviolet rays which have an irradiation energy of 200 mJ/cm 2 or more.

13. The ink jet recording method according to claim 1 , wherein the temperature of the ejecting ink is in a range of 34° C. to 39° C.

14. The ink jet recording method according to claim 1 , wherein the ultraviolet-ray curable ink includes an acylphosphine oxide compound as a photopolymerization initiator.

15. The ink jet recording method according to claim 14 , wherein a content of the acylphosphine oxide compound is 5 to 15 mass % with respect to a total mass of the ultraviolet-ray curable ink.

16. The ink jet recording method according to claim 1 , wherein the ultraviolet-ray curable ink includes a monofunctional (meth) acrylate and a bifunctional or higher (meth) acrylate.

17. An ink jet recording method comprising:
ejecting an ultraviolet-ray curable ink of which a viscosity at 28° C. is 8 mPa·s or more from a head to a recording medium; and
curing the ultraviolet-ray curable ink attached to the recording medium, wherein the ultraviolet-ray curable ink is heated such that a temperature of the ejected ultraviolet-ray curable ink is in a range of 28° C. to 39° C., and a viscosity of the ultraviolet-ray curable ink at the heated temperature of the ejected ultraviolet-ray curable ink is in a range of 15 mPa·s or less,
wherein the ultraviolet-ray curable ink includes (meth)acrylic acid esters containing a vinyl ether group expressed in a following Formula (I):
CH 2 ═CR 1 —COOR 2 —O—CH═CH—R 3   (I)

wherein R 1 indicates a hydrogen atom or a methyl group, R 2 indicates a divalent organic residue having 2 to 20 carbon atoms, and R 3 indicates a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms.

18. The ink jet recording method according to claim 17 , wherein a content of the (meth)acrylate acid esters containing a vinyl ether group expressed in the Formula (I) is 10 to 70 mass % with respect to the total mass of the ultraviolet-ray curable ink.

19. The ink jet recording method according to claim 17 , wherein the ultraviolet-ray curable ink includes monofunctional (meth)acrylate other than the (meth)acrylate acid esters containing a vinyl ether group expressed in the Formula (I).

20. The ink jet recording method according to claim 17 , wherein the ultraviolet-ray curable ink includes bifunctional (meth)acrylate, or trifunctional or higher (meth)acrylate.

Assignees

• Seiko Epson Corp

Inventors

• Kobayashi Yoshihiro
• Mizutaki Yusuke
• Kumagai Toshio
• Ando Masaaki
• Kida Hiroaki
• Koike Kaoru
• Yoshizawa Mitsuaki

Classifications

• B41J11/00214 Primary

  using UV radiation · CPC title

• B41M7/0081

  using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams · CPC title

• B41J2/2107

  characterised by the ink properties (supplying ink in a solid state B41J2/17593) · CPC title

• B41J2/17509

  Whilst mounted in the printer · CPC title

• B41J11/002 Primary

  Curing or drying the ink on the copy materials, e.g. by heating or irradiating · CPC title