Ink jet recording method, ultraviolet curable ink, and ink jet recording apparatus
Provided is an ink jet recording method including: discharging first ultraviolet curable ink of a radical polymerization reaction type which contains a radical photopolymerization initiator and a radical polymerization compound and in which transmittance at a wavelength of 395 nm is equal to or less than 1%, onto a recording medium; and curing the first ultraviolet curable ink which is landed on the recording medium by irradiating the ink with ultraviolet light, in which a light source which initially emits the ultraviolet light in the curing of the ink is an ultraviolet light emitting diode in which peak intensity of the irradiated ultraviolet light is equal to or more than 800 mW/cm 2 .
1. An ink jet recording method comprising:
discharging ultraviolet curable ink containing vinyl ether group-containing (meth)acrylate ester(s) expressed by the following General Formula (I) onto a recording medium, wherein:
the ultraviolet curable ink contains other monofunctional (meth)acrylate other than the vinyl ether group-containing (meth)acrylate ester(s) expressed by General Formula (I), wherein a content of the vinyl ether group-containing (meth)acrylate esters expressed by the following General Formula (I) is 35% by mass or less with respect to a total content of the ink, and the other monofunctional (meth)acrylate contains one or more of monofunctional (meth)acrylate having an aromatic ring skeleton, or isobornyl(meth)acrylate; and
curing the ultraviolet curable ink which is landed on the recording medium by irradiating the ink with ultraviolet light from an ultraviolet light emitting diode in which peak intensity of the irradiated ultraviolet light is in a range of equal to or more than 800 mW/cm 2 ;
CH 2 ═CR 1 —COOR 2 —O—CHCH—R 3 (I)
(in the formula, R 1 represents a hydrogen atom or a methyl group, R 2 represents a divalent organic residue having 2 to 20 carbon atoms, and R 3 represents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms).
2. The ink jet recording method according to claim 1 , wherein an irradiation energy of ultraviolet light emitted from the ultraviolet light emitting diode is 100 mJ/cm 2 to 600 mJ/cm 2 .
3. The ink jet recording method according to claim 1 , wherein the irradiation from the ultraviolet light emitting diode is at least any of pulse irradiation and spot irradiation by a condensing lens individually.
4. The ink jet recording method according to claim 1 , wherein peak intensity of the irradiated ultraviolet light is in a range of 800 mW/cm 2 to 4000 mW/cm 2 .
5. The ink jet recording method according to claim 1 , wherein the ultraviolet light emitting diode has a light emitting peak wavelength in a range of 360 nm to 420 nm.
6. An ultraviolet curable ink used for the ink jet recording method according to claim 1 .
7. An ink jet recording apparatus which is used with the ink jet recording method according to claim 1 .
8. The ink jet recording method according to claim 1 , wherein peak intensity of the irradiated ultraviolet light is in a range of 800 mW/cm 2 to 2,000 mW/cm 2 .
9. The ink jet recording method according to claim 1 , wherein a content of the vinyl ether group-containing (meth)acrylate esters expressed by the following General Formula (I) is 25% by mass or less with respect to a total content of the ink.
10. The ink jet recording method according to claim 1 , further comprising recording using a line ink jet recording apparatus including a line head having a length equal to or greater than a length corresponding to a width of a recording medium.
11. The ink jet recording method according to claim 1 , wherein the content of the vinyl ether group-containing(meth)acrylate ester(s) expressed by the General Formula (I) is 10 to 35% by mass with respect to a total content of the ultraviolet curable ink.
12. The ink jet recording method according to claim 1 , wherein the content of the monofunctional (meth)acrylate except for the vinyl ether group-containing(meth)acrylate ester(s) expressed by the General Formula (I) is 30 to 35% by mass with respect to a total content of the ultraviolet curable ink.
13. The ink jet recording method according to claim 1 , wherein the content of a bifunctional or more (meth)acrylate is 5 to 34.5% by mass with respect to a total content of the ultraviolet curable ink.
14. The ink jet recording method according to claim 1 , wherein the other monofunctional (meth)acrylate includes monofunctional (meth)acrylate including an aromatic skeleton.
15. The ink jet recording method according to claim 1 , wherein the other monofunctional (meth)acrylate contains one or more of phenoxyethyl (meth)acrylate, phenoxy diethylene glycol (meth)acrylate, 2-hydroxy-3-phenoxypropyl (meth)acrylate, and benzyl (meth)acrylate.