# US 9,434,169 B2 · Ink jet recording method and ink jet recording apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,434,169 B2 - Document ID: US9434169B2 - Status: Granted - Kind: B2 - Application number: 14/564,800 - Filed: 2014-12-09 - Published: 2015-06-11 - Granted: 2016-09-06 - Earliest claimed: 2013-12-09 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Hiroaki Kida; Hiroshi Fukumoto - Web page: https://patentgrep.com/patent/US9434169B2 ## CPC - B41J 2/16538: {with brushes or wiper blades perpendicular to the nozzle plate} - B41J 2/16552: {using cleaning fluids} - B41J 11/00214: {using UV radiation} - B41M 5/0023: {Digital printing methods characterised by the inks used (inks per se C09D11/00)} - B41M 7/0081: {using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams} - 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 - C09D 11/324: containing carbon black - C09D 11/38: characterised by non-macromolecular additives other than solvents, pigments or dyes - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P) - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) ## Abstract Disclosed herein is an ink jet recording method, including: scanning a recording medium with an ink jet head and simultaneously discharging an ultraviolet-curable ink composition for ink jet recording from the ink jet head to adhere the ink composition to the recording medium; irradiating the ultraviolet-curable ink composition for ink jet recording adhered to the recording medium with ultraviolet rays two times or more; and wiping a nozzle of the ink jet head, from which the ultraviolet-curable ink composition for ink jet recording has been discharged, using a nozzle wiping member. ## Claims ### Claim 1 An ink jet recording method, comprising: scanning a recording medium with an ink jet head and simultaneously discharging an ultraviolet-curable ink composition from the ink jet head to adhere the ink composition to the recording medium; irradiating the ultraviolet-curable ink composition adhered to the recording medium with at least a first ultraviolet irradiation and a second or subsequent ultraviolet irradiation; and wiping a nozzle of the ink jet head, from which the ultraviolet-curable ink composition has been discharged, using a nozzle wiping member, wherein the ultraviolet-curable ink composition contains a color material, a polymerizable compound having a di- or higher functional (meth)acryloyl group, a photopolymerization initiator, and a hindered amine compound, wherein the energy of the first ultraviolet irradiation is less than the energy of the second or subsequent ultraviolet irradiation, wherein the first ultraviolet irradiation is performed downstream of the recording medium transporting direction past the ink jet head and the second ultraviolet irradiation is performed on the downstream side of the recording medium transporting direction past the position at which the first ultraviolet irradiation is performed, and wherein an irradiation intensity of a light source in the second Of subsequent ultraviolet irradiation is 5 mW/cm2 to 2000 mW/cm2. ### Claim 2 (depends on 1) The ink jet recording method according to claim 1, wherein the content of the hindered amine compound is 0.005 mass % to 0.5 mass %, based on 100 mass % of the ultraviolet curable ink composition. ### Claim 3 (depends on 1) The ink jet recording method according to claim 1, wherein the energy of the first ultraviolet irradiation is 2.5 mJ/cm2 to 40 mJ/cm2, and a total ultraviolet irradiation energy is 100 mJ/cm2 to 1500 mJ/cm2. ### Claim 4 (depends on 1) The ink jet recording method according to claim 1, wherein, in the irradiating, at least a light source used in the first ultraviolet irradiation is a semiconductor light source having a peak wavelength of 350 nm to 420 nm. ### Claim 5 (depends on 1) The ink jet recording method according to claim 1, wherein, in the irradiating, at least a light source used in the first ultraviolet irradiation is an LED having a peak wavelength of 350 nm to 420 nm. ### Claim 6 (depends on 1) The ink jet recording method according to claim 1, wherein the content of the polymerizable compound having a di- or higher functional (meth)acryloyl group is 5 mass % to 60 mass %, based on 100 mass % of the ultraviolet-curable ink composition. ### Claim 7 (depends on 1) The ink jet recording method according to claim 1, wherein, in the scanning, recording is performed by scanning the recording medium one time with an ink jet head having a length equal to or greater than a recording width of the recording medium. ### Claim 8 (depends on 1) The ink jet recording method according to claim 1, wherein the ultraviolet-curable ink composition contains a polymerizable compound having a tri- or higher functional (meth)acryloyl group. ### Claim 9 (depends on 1) The ink jet recording method according to claim 1, wherein, in the wiping, the nozzle is wiped by the nozzle wiping member using a cleaning liquid containing an alkylene glycol derivative. ### Claim 10 (depends on 1) The ink jet recording method according to claim 1, wherein a total energy of the second or subsequent ultraviolet irradiation is 8 times to 140 times the first ultraviolet irradiation energy. ### Claim 11 (depends on 1) The ink jet recording method according to claim 1, wherein the hindered amine compound includes a compound having a 2,2,6,6 tetramethylpiperidine-N-oxyl skeleton. ### Claim 12 (depends on 1) An ink jet apparatus, which performs recording by the ink jet method according to claim 1. ### Claim 13 (depends on 2) An ink jet apparatus, which performs recording by the ink jet method according to claim 2. ### Claim 14 (depends on 3) An ink jet apparatus, which performs recording by the ink jet method according to claim 3. ### Claim 15 (depends on 4) An ink jet apparatus, which performs recording by the ink jet method according to claim 4. ### Claim 16 (depends on 5) An ink jet apparatus, which performs recording by the ink jet method according to claim 5. ### Claim 17 (depends on 1) The ink jet recording method according to claim 1, wherein the scanning is performed by transporting the recording medium in a scanning direction or moving the ink jet head in a main scanning direction. ### Claim 18 (depends on 1) The ink jet recording method according to claim 1, wherein the scanning is performed by transporting the recording medium in a scanning direction. ### Claim 19 (depends on 1) The ink jet recording method according to claim 1, wherein at least the first ultraviolet irradiation of the irradiation step is ultraviolet radiation for temporary curing. ### Claim 20 (depends on 1) The ink jet recording method according to claim 1, wherein the ultraviolet-curable ink composition is cured by at least the first ultraviolet irradiation and the second or subsequent ultraviolet irradiation, and this is the main curing of the ultraviolet-curable ink composition. ### Claim 21 (depends on 1) The ink jet recording method according to claim 1, wherein the recording medium transporting direction is the scanning direction. ### Claim 22 (depends on 1) The ink jet recording method according to claim 1, wherein an intensity of the first ultraviolet irradiation is 5 mW/cm2 to 100 mW/cm2 and an intensity of the second or subsequent ultraviolet irradiation is 350 mW/cm2 to 2000 mW/cm2.