WO2015170596A1 - インクジェット記録方法およびインクジェット記録装置 - Google Patents
インクジェット記録方法およびインクジェット記録装置 Download PDFInfo
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- WO2015170596A1 WO2015170596A1 PCT/JP2015/062380 JP2015062380W WO2015170596A1 WO 2015170596 A1 WO2015170596 A1 WO 2015170596A1 JP 2015062380 W JP2015062380 W JP 2015062380W WO 2015170596 A1 WO2015170596 A1 WO 2015170596A1
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- ink
- recording medium
- fabric
- inkjet
- ink jet
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/20—Physical treatments affecting dyeing, e.g. ultrasonic or electric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/21—Ink jet for multi-colour printing
- B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
- B41J2/2146—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding for line print heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
- B41J3/4078—Printing on textile
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/30—Ink jet printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0064—Digital printing on surfaces other than ordinary paper on plastics, horn, rubber, or other organic polymers
Definitions
- the present invention relates to an ink jet recording method and an ink jet recording apparatus.
- ink is ejected from an ink jet head onto a recording medium, and an image is formed by a collection of ink droplets.
- the ink jet recording method is also used for textile printing.
- an ink containing an aqueous medium and a colorant is usually used as the ink.
- the recording medium is usually a fabric.
- a fabric that has been pretreated with a pretreatment agent for suppressing ink bleeding is used as the fabric. Since the fabric pretreated with the pretreatment agent is usually used after being dried, it has a property of absorbing the aqueous medium of the ink.
- a one-pass inkjet recording method is known as one of the commercially advantageous inkjet recording methods.
- one or more inks are ejected from the inkjet head on the surface of the recording medium by a single scan on the recording medium of the inkjet head to form an image.
- a border of the color of the ink ejected later is formed in the formed image.
- the image may lack detail.
- An object of the present invention is to form a fine image even when an image is formed on an absorbent recording medium by a one-pass inkjet recording method.
- the present invention relates to the following inkjet recording method.
- Two or more kinds of inks containing an aqueous medium and a colorant are ejected on the surface of the recording medium having the absorptivity of the aqueous medium by a single scan on the recording medium of an inkjet head.
- a one-pass inkjet recording method for forming an image wherein the recording medium is a fabric or a non-woven fabric, and the inkjet recording method is configured such that the surface of the recording medium is ejected before the ink is ejected onto the recording medium.
- An ink jet recording method comprising a step of humidifying the ink.
- the present invention also relates to the following ink jet recording apparatus.
- Inkjet for ejecting ink while moving in one direction relative to the recording medium, and forming the desired image with a single scan on the recording medium, and holding the recording medium
- a one-pass inkjet recording apparatus having a transport mechanism for moving the inkjet in one direction relative to the recording medium, wherein the recording medium is a fabric or a non-woven fabric, and the recording
- An ink jet recording apparatus further comprising a humidifier for humidifying a surface of a front portion of the medium in a scanning direction of the ink jet head.
- the inkjet head has a plurality of nozzle groups for ejecting a plurality of colors of ink, each of the nozzle groups protrudes a different color of ink, and the humidifying device is connected to each of the nozzle groups.
- the ink jet recording apparatus according to [5] wherein a plurality of the ink jet recording apparatuses are arranged correspondingly and arranged in front of the nozzle group in the scanning direction.
- the humidifier includes a nozzle for supplying air having a relative humidity of 50 to 80% to the surface of the recording medium.
- the surface of the recording medium is moistened with the same degree of wetness as that of the ink droplet landing. Droplets and ink droplets that subsequently land on the recording medium spread substantially the same. As a result, there is no bordering of the color of the subsequent ink around the formed image, so a fine image can be formed even when an image is formed on an absorbent recording medium by the one-pass inkjet recording method. .
- FIG. 1 is a diagram schematically illustrating an example of a configuration of an ink jet recording apparatus according to an embodiment of the present invention.
- FIG. 2A is a diagram schematically illustrating the configuration of the inkjet head unit according to the present embodiment when viewed in plan, and FIG. 2B schematically illustrates the configuration of the inkjet head unit as viewed from the side.
- FIG. 2C is a diagram schematically illustrating the configuration of the inkjet head unit as viewed from the front.
- FIG. 3A is a diagram schematically illustrating a state in which the first ink penetrates into the fabric.
- FIG. 3B is a diagram illustrating a state in which the fabric is humidified immediately before the first ink is ejected and the first ink is ejected.
- FIG. 3A is a diagram schematically illustrating a state in which the fabric is humidified immediately before the first ink is ejected and the first ink is ejected.
- FIG. 3C is a diagram schematically illustrating how the second ink penetrates into the fabric when the second ink is further discharged.
- FIG. 3C illustrates the first ink without being humidified before discharging the first ink. It is a figure which shows typically a mode that 2nd ink osmose
- the ink jet recording method according to the present embodiment is a so-called one-pass method in which two or more inks are ejected onto the surface of a recording medium by a single scan on the recording medium of the ink jet head to form an image. Ink jet recording method.
- the ink contains an aqueous medium and a colorant. There are two or more of these inks, which are usually different color inks, but may be the same color inks. As long as two or more kinds of the ink are used, any number of inks may be used as long as the desired appearance can be obtained by overstrike.
- the aqueous medium is a liquid mainly composed of water, and is water or an aqueous solution.
- the solute of the aqueous medium include a salt and a water-soluble organic solvent.
- the content of the water-soluble organic solvent in the ink is preferably 15 to 70% by mass, and preferably 30 to 60% by mass from the viewpoints of dissolving various components in the ink and from the viewpoint of ink drying properties. % Is more preferable. When the content is 15% by mass or more, it is preferable from the viewpoint of adjusting the liquid physical properties such as the viscosity of the ink and dissolving the surfactant. When the content exceeds 70% by mass, the drying property of the ink is deteriorated, the printed fabric is not dried, and the printed matter before heat treatment (coloring) may not be stacked or wound.
- water-soluble organic solvent examples include polyhydric alcohol, amine, monohydric alcohol, polyhydric alcohol alkyl ether, 2,2'-thiodiethanol, amide, heterocyclic compound, and acetonitrile.
- polyhydric alcohol examples include 1,6-hexanediol, 1,2-hexanediol, 1,5-pentanediol, 1,2-pentanediol, 2,2-dimethyl-1,3-propanediol, 2-methyl-2,4-pentanediol, 3-methyl-1,5-pentanediol, 3-methyl-1,3-butanediol, 2-methyl-1,3-propanediol and glycols are included.
- glycols examples include ethylene glycol, glycerin, 2-ethyl-2- (hydroxymethyl) -1,3-propanediol, tetraethylene glycol, triethylene glycol, tripropylene glycol, 1,2,4-butane. Triols, diethylene glycol, propylene glycol, dipropylene glycol and butylene glycol are included.
- the content of the glycols in the ink suppresses excessive swelling of the water-soluble polymer of the fabric in addition to the reasons described above, and makes it easier for the ink discharged later to penetrate into the fabric.
- the content is preferably 15 to 60% by mass, and more preferably 30 to 60% by mass.
- Examples of the amine include ethanolamine and 2- (dimethylamino) ethanol.
- Examples of the monohydric alcohol include methanol, ethanol and butanol.
- alkyl ether of the polyhydric alcohol examples include diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol monobutyl ether, ethylene glycol monomethyl ether, ethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol mono Butyl ether and dipropylene glycol monomethyl ether are included.
- amide examples include N, N-dimethylformamide.
- heterocyclic compound examples include 2-pyrrolidone.
- the colorant may be one kind or more.
- the colorant include water-soluble dyes, disperse dyes, pigments, reactive dyes, acid dyes and direct dyes.
- the colorant for example, various colorants described in “Dyeing Note 21st Edition” (Color Dyeing Company) are used.
- disperse dyes examples include C.I. I. Disperse Yellow 3, 4, 5, 7, 9, 13, 23, 24, 30, 33, 34, 42, 44, 49, 50, 51, 54, 56, 58, 60, 63, 64, 66, 68, 71, 74, 76, 79, 82, 83, 85, 86, 88, 90, 91, 93, 98, 99, 100, 104, 108, 114, 116, 118, 119, 122, 124, 126, 135, 140, 141, 149, 160, 162, 163, 164, 165, 179, 180, 182, 183, 184, 186, 192, 198, 199, 202, 204, 210, 211, 215, 216, 218, 224, 227, 231, 232; I.
- Examples of the pigment include carbon black; C.I. I. Pigment Yellow 1, 3, 12, 13, 14, 16, 17, 43, 55, 74, 81, 83, 109, 110, 128; C.I. I. Pigment Orange 13, 16, 34, 43; C.I. I. Pigment Red 2, 5, 8, 12, 17, 22, 23, 41, 112, 114, 122, 123, 146, 148, 150, 166, 170, 220, 238, 245, 258; I. Pigment Violet 19, 23; C.I. I. Pigment Blue 15, 15: 1, 15: 3, 15: 5, 29; C.I. I. Pigment Green 7, 8; C.I. I. Pigment Brown 22; C.I. I. Pigment Black 1, 7; and C.I. I. Pigment White 6; is included.
- Examples of the reactive dye include C.I. I. Reactive Yellow 2, 3, 7, 15, 17, 18, 22, 23, 24, 25, 27, 37, 39, 42, 57, 69, 76, 81, 84, 85, 86, 87, 92, 95, 102, 105, 111, 125, 135, 136, 137, 142, 143, 145, 151, 160, 161, 165, 167, 168, 175, 176, C.I. I. Reactive Orange 1, 4, 5, 7, 11, 12, 13, 15, 16, 20, 30, 35, 56, 64, 67, 69, 70, 72, 74, 82, 84, 86, 87, 91, 92, 93, 95, 107; C.I. I.
- Reactive Red 2, 3, 3 1, 5, 8, 11, 21, 22, 23, 24, 28, 29, 31, 33, 35, 43, 45, 49, 55, 56, 58, 65, 66, 78, 83, 84, 106, 111, 112, 113, 114, 116, 120, 123, 124, 128, 130, 136, 141, 147, 158, 159, 171, 174, 180, 183, 184, 187, 190, 193, 194, 195, 198, 218, 220, 222, 223, 228, 235; I. Reactive Violet 1, 2, 4, 5, 6, 22, 23, 33, 36, 38; I.
- Examples of the acid dye include C.I. I. Acid Yellow 1, 3, 11, 17, 18, 19, 23, 25, 36, 38, 40, 40: 1, 42, 44, 49, 59, 59: 1, 61, 65, 67, 72, 73, 79, 99, 104, 159, 169, 176, 184, 193, 200, 204, 207, 215, 219, 219: 1, 220, 230, 232, 235, 241, 242, 246; I.
- Examples of direct dyes include C.I. I. Direct Yellow 8, 9, 10, 11, 12, 22, 27, 28, 39, 44, 50, 58, 86, 87, 98, 105, 106, 130, 137, 142, 147, 153; C.I. I. Direct Orange 6, 26, 27, 34, 39, 40, 46, 102, 105, 107, 118; C.I. I. Direct Red; 2, 4, 9, 23, 24, 31, 54, 62, 69, 79, 80, 81, 83, 84, 89, 95, 212, 224, 225, 226, 227, 239, 242, 243 254; C.I. I. Direct Violet 9, 35, 51, 66, 94, 95; C.I. I.
- the content of the colorant in the ink is preferably 0.1 to 20% by mass, and more preferably 0.2 to 13% by mass.
- the Z average particle diameter of the pigment or the disperse dye is preferably 300 nm or less, or the maximum particle diameter of the pigment or the disperse dye is preferably 900 nm or less.
- the Z average particle size or the maximum particle size exceeds the above range, clogging is likely to occur in an ink jet printing method in which the fine nozzles emit light, and stable ink ejection may not be possible for a long time.
- the Z average particle size or the maximum particle size can be measured using a commercially available particle size measuring device using a light scattering method, an electrophoresis method, a laser Doppler method, etc., for example, Zetasizer Nano S manufactured by Malvern. It is.
- the Z average particle size or maximum particle size may be adjusted by dispersing the pigment or disperse dye with a bead mill using a commercially available dispersant, classification of the pigment or disperse dye, and mixing of classified products. Is possible.
- the ink may further contain components other than those described above as long as the effects of the present embodiment can be obtained.
- the ink may further contain a surfactant from the viewpoint of adjusting the surface tension of the ink and further stabilizing the dispersion of the colorant.
- the surfactant may be one kind or more.
- the surfactant may be any of cationic, anionic, amphoteric and nonionic surfactants.
- cationic surfactant examples include aliphatic amine salts, aliphatic quaternary ammonium salts, benzalkonium salts, benzethonium chloride, pyridinium salts and imidazolinium salts.
- anionic surfactant examples include fatty acid soap, N-acyl-N-methylglycine salt, N-acyl-N-methyl- ⁇ -alanine salt, N-acyl glutamate, alkyl ether carboxylate, Acylated peptides, alkyl sulfonates, alkyl benzene sulfonates, alkyl naphthalene sulfonates, dialkyl sulfosuccinates, alkyl sulfoacetates, ⁇ -olefin sulfonates, N-acyl methyl taurines, sulfated oils, higher grades Alcohol sulfate, secondary higher alcohol sulfate, alkyl ether sulfate, secondary higher alcohol ethoxy sulfate, polyoxyethylene alkylphenyl ether sulfate, monoglyculate, fatty acid alkylolamide sulfate, alkyl ether Phosphoric acid
- amphoteric surfactant examples include carboxybetaine type, sulfobetaine type, aminocarboxylate, and imidazolinium betaine.
- nonionic surfactant examples include polyoxyethylene alkyl ether, polyoxyethylene secondary alcohol ether, polyoxyethylene alkylphenyl ether (eg, Emulgen 911), polyoxyethylene sterol ether, polyoxyethylene lanolin derivative Polyoxyethylene polyoxypropylene alkyl ether (for example, New Pole PE-62), polyoxyethylene glycerin fatty acid ester, polyoxyethylene castor oil, hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, Polyethylene glycol fatty acid ester, fatty acid monoglyceride, polyglycerin fatty acid ester, sorbitan fatty acid ester, propylene glycol fatty acid Ester, sucrose fatty acid esters, fatty acid alkanolamides, polyoxyethylene fatty acid amides, polyoxyethylene alkyl amines, alkyl amine oxides, include acetylene glycol and acetylene alcohol. “E
- the surfactant is preferably a nonionic surfactant or an anionic surfactant.
- the content of the surfactant in the ink can be appropriately determined from the viewpoint of improving the dispersibility of the colorant and adjusting the surface tension of the ink, and is, for example, 0.05 to 2% by mass.
- the ink may contain a preservative or an antifungal agent from the viewpoint of the storage stability of the ink.
- preservatives or antifungal agents include aromatic halogen compounds (eg, Preventol (preventol) CMK), methylene dithiocyanate, halogenated nitrogen sulfur compounds, and 1,2-benzisothiazolin-3-one (eg, , PROXEL (Proxel) GXL).
- aromatic halogen compounds eg, Preventol (preventol) CMK
- methylene dithiocyanate e.g, halogenated nitrogen sulfur compounds
- 1,2-benzisothiazolin-3-one eg, PROXEL (Proxel) GXL
- Preventor is a registered trademark of LANXESS
- Proxel is a registered trademark of Arch Corporation.
- the recording medium has a property of absorbing the aqueous medium (absorbability of the aqueous medium).
- the absorptivity refers to the property that the aqueous medium attached to the recording medium penetrates into the recording medium while spreading in both the direction along the surface of the recording medium and the thickness direction of the recording medium.
- the aqueous medium in which the recording medium exhibits absorbency may be the same as or different from the aqueous medium in the ink.
- the recording medium can be selected from recording media having the above-described absorbability that can be used in textile printing.
- the recording medium may be, for example, a sheet or a model formed of fibers, and the material of the fibers is appropriately selected as long as the effects of the present embodiment can be obtained.
- the recording medium is, for example, a fabric or a non-woven fabric.
- the fabric is made of, for example, a fiber that can be dyed with a reactive dye.
- fabrics include cellulose fibers such as cotton, protein fibers such as silk, and blended fabrics of any of these fibers with rayon, polyurethane, polyester, or acrylic resin.
- the form of the fabric may be any of a woven fabric, a knitted fabric and a non-woven fabric.
- the thickness of the fibers constituting the fabric is preferably 10 to 100d.
- the fabric includes a pretreatment agent for preventing bleeding of the ink on the surface of the fabric.
- the pretreatment agent may be included only in the surface portion in the thickness direction of the fabric (recording medium), or may be included in the entire thickness direction of the fabric.
- the pretreatment agent contains, for example, a water-soluble polymer compound, an alkali agent, and a hydrotropic agent.
- the water-soluble polymer compound is a polymer compound that is uniformly dispersed and dissolved in water.
- water-soluble polymer compounds include natural gums such as guar gum and locust bean gum; starch; sodium alginate; seaweeds such as funari; plant skins such as pectic acid; celluloses such as methylcellulose, ethylcellulose, hydroxyethylcellulose, and carboxymethylcellulose Derivatives; Processed starches such as roasted starch, alpha starch, carboxymethyl starch, carboxyethyl starch, hydroxyethyl starch; processed natural gums such as shiratsu gum and roast bean gum; and alginic acid derivatives, polyvinyl alcohol, polyacrylates, etc. Synthetic glue or emulsion.
- the amount of the water-soluble polymer compound applied to the fabric is preferably 0.2 to 50% by mass, and preferably 1 to 30% by mass from the viewpoint of keeping the ink in the fabric without bleeding. More preferred.
- alkali agent examples include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; amines such as mono-, di- and triethanolamine; carbonates such as sodium carbonate, potassium carbonate and sodium bicarbonate (sodium bicarbonate). Or alkali metal bicarbonate salts; organic acid metal salts such as calcium acetate and barium acetate; ammonia and ammonium compounds; and compounds that become alkaline agents under steaming or dry heat, such as sodium trichloroacetate. More preferably, the alkaline agent is sodium carbonate or sodium bicarbonate.
- the amount of the alkali agent applied to the fabric is preferably 0.1 to 10% by mass, and preferably 0.5 to 5% by mass from the viewpoint of dyeing the ink containing reactive dye onto the fabric. More preferred. From the above viewpoint, the alkali agent is preferably contained in the fabric in advance.
- the hydrotropic agent is used from the viewpoint of increasing the image density.
- the hydrotropic agents include urea; and alkyl ureas such as ethylene urea, dimethyl urea, thiourea, monomethylthiourea, dimethylthiourea.
- the pretreatment agent may further contain components other than the components described above.
- examples of such other components include reduction inhibitors, preservatives and chelating agents.
- Examples of the reduction inhibitor include sodium m-nitrobenzenesulfonate.
- Examples of the preservative include preservatives exemplified as ink preservatives.
- Examples of the chelating agent include ethylenediaminetetraacetate, nitrilotriacetate, hexametaphosphate, pyrophosphate and metaphosphate.
- the amount (squeezing rate) of the pretreatment agent and the content of the water-soluble polymer compound in the pretreatment agent are appropriately set according to, for example, the type of fabric.
- Examples of methods for applying the pretreatment agent to the fabric include a pad method, a coating method, a spray method, and an ink jet method.
- the pretreatment agent applied to the fabric can be heated and dried using a known heating device such as hot air, a hot plate, or a heat roller.
- Examples of the fabric provided with the pretreatment agent include fabrics having an ink receiving layer described in JP-A No. 62-53492, and anti-reducing agents and alkalis described in Japanese Patent Publication No. 3-46589.
- a fabric containing an agent are examples of the pretreatment agent applied to the fabric.
- the ink jet recording method in the present embodiment includes a step of humidifying the surface of the recording medium (humidifying step) before discharging the ink onto the recording medium.
- the degree of humidification of the recording medium in the humidification step can be appropriately determined from the range in which the effects of the present invention can be obtained, with the upper limit being the degree of wetting of the recording medium to the extent that the recording medium gets wet by ink ejection.
- the wetting of the recording medium in the humidification process may be slight, or the fibers of the recording medium are only wetted by the landing of ink droplets, or the water-soluble polymer compound in the pretreatment agent May swell due to the landing of ink droplets.
- the degree of humidification of the recording medium may be up to an extent corresponding to the wetness of the surface due to the ejection of the ink, and the humidification step is performed on the surface of the recording medium before the ink droplets land. May be a step of moistening the surface of the recording medium to substantially the same extent as the surface of the recording medium after the ink droplets have landed.
- the humidification range in the thickness direction of the recording medium in the humidification step can be appropriately determined from the range in which the effects of the present invention can be obtained.
- ink droplets that land on the surface of the recording medium It is possible to determine appropriately from a range including a range in which the ink reaches (permeates).
- the above range is appropriately determined according to the type of ink, the type and thickness of the recording medium, and the like.
- the humidification step causes the aqueous medium to wet due to the ink droplet landing on at least the surface of the recording medium before the ink droplet landing.
- the humidification step can be performed by supplying the aqueous medium to the surface of the recording medium.
- the aqueous medium may be the same as or different from the aqueous medium of the ink used.
- the aqueous medium in the humidification step is supplied to the surface of the recording medium as, for example, a gas with adjusted humidity such as humidified air or fine particles of an aqueous medium such as nanomist.
- humidified air is preferable from the viewpoint of uniformly humidifying the surface of the recording medium and from the viewpoint of being easily and inexpensively generated.
- the relative humidity of the humidified air is preferably 50 to 80%, and more preferably 55 to 75%.
- the temperature of the humidified air is preferably 20 to 40 ° C., and more preferably 20 to 30 ° C.
- the air volume of the humidified air is preferably 0.2 to 5 m / sec, and more preferably 0.5 to 3 m / sec.
- the humidification step may be performed collectively before all ink is ejected, but from the viewpoint of equalizing the spread of ink in the ink droplets landed on the surface of the recording medium with all ink ejected. It is preferable to carry out each ink type individually.
- the humidification step for each discharge of various inks can be performed, for example, by disposing a humidifier for performing the humidification step corresponding to an ink jet head of various inks. Examples of the apparatus include a nozzle for spraying humidified air or nano mist onto the recording medium.
- ink is ejected onto the surface of the recording medium humidified in the humidification step.
- the ink is ejected while the wetness of the surface of the recording medium is substantially maintained.
- ink is ejected immediately after the humidification step.
- the ink jet recording method according to the present embodiment may further include a process other than the humidification process as long as the effect of the present embodiment is obtained.
- Examples of the other steps include a pretreatment step of pretreating the recording medium with the pretreatment agent, a preliminary drying step of drying the recording medium after the ink has been ejected, and the ink ejected onto the recording medium as the recording medium.
- a coloring process for dyeing the ink in the ink to express the original hue of the ink a cleaning process for cleaning the recording medium after the coloring process and removing the pretreatment agent and excess ink from the recording medium, and after the cleaning process
- a drying step of drying the recording medium can be performed by a known method in textile printing using an ink jet recording method.
- FIG. 1 is a diagram schematically showing an example of the configuration of the ink jet recording apparatus according to the present embodiment.
- the inkjet recording apparatus 10 transports four inkjet head units 11 corresponding to yellow, magenta, cyan, and black colors and a fabric 100 as a recording medium in succession.
- An arrow X in FIG. 1 indicates the conveyance direction of the fabric 100.
- FIG. 2A is a diagram schematically illustrating the configuration of the inkjet head unit 11 when viewed in plan
- FIG. 2B is a diagram schematically illustrating the configuration of the inkjet head unit 11 as viewed from the side
- FIG. 2C is a diagram schematically illustrating the configuration of the inkjet head unit 11 when viewed from the front.
- each of the inkjet head units 11 includes a plurality of inkjet heads 111 arranged in two rows along the width direction of the fabric indicated by the arrow Y, and humidified air to the fabric 100. And a blowout port 112 for blowing out. All of the inkjet heads 111 are fixed on the conveyance belt.
- the inkjet heads 111 are arranged so as to partially overlap each other in the Y direction, and are arranged without any gaps as a whole.
- the outlet 112 is a duct having an elongated rectangular opening that extends from the center in the Y direction along the Y direction, and corresponds to a humidifier.
- the outlet 112 is disposed upstream of the inkjet head 111 in the X direction and extends to a range at least overlapping with all the inkjet heads 111 in the Y direction.
- the inkjet head 111 has, for example, an ink chamber (not shown), a pressure chamber, and a nozzle, and is connected to an ink tank that stores ink of each color.
- the outlet 112 is connected to a humidifier (not shown), for example.
- the conveyor belt is an endless adhesive belt 21, a support roll 22 and a conveyor roll 23 that support the adhesive belt 21, and a position that sandwiches the conveyor roll 23 and the adhesive belt 21.
- a nip roll 24 arranged.
- the adhesive belt 21 has adhesiveness on the surface on which the fabric 100 is placed.
- the conveyance roll 23 is configured to be driven to rotate freely, and the support roll 22 is arranged to be rotatable. Further, the nip roll 24 is disposed so as to be able to approach and separate from the transport roll 23.
- the fabric 100 When the transport belt is driven, the fabric 100 is transported continuously in the X direction.
- the fabric 100 is pre-treated by applying a pre-treatment liquid and drying it.
- the fabric 100 is supplied with humidified air of, for example, 25 ° C. and 70 RH% at 2 m / second from the outlet 112 of the inkjet head unit 11 on the upstream side.
- humidified air for example, 25 ° C. and 70 RH% at 2 m / second from the outlet 112 of the inkjet head unit 11 on the upstream side.
- the surface of the fabric 100 is moistened to the same extent as when ink droplets land.
- the first ink is ejected from the inkjet head 111 to the wetted portion of the fabric 100. Similar humidification and second and subsequent ink ejections are also performed in the inkjet head 111 on the downstream side.
- the ink of the desired color is ejected to the fabric 100 only once through the inkjet head unit 11, and a desired image is formed on the surface of the fabric 100.
- the fabric 100 on which an image is formed as described above is subjected to the above-described steps of preheating, color development, washing, and drying.
- FIG. 3A is a diagram schematically illustrating a state in which the first ink penetrates into the fabric.
- FIG. 3B is a diagram illustrating a state in which the fabric is humidified immediately before the first ink is ejected and the first ink is ejected.
- FIG. 3C is a diagram schematically illustrating how the second ink penetrates into the fabric when the second ink is further discharged.
- FIG. 3C illustrates the first ink without being humidified before discharging the first ink. It is a figure which shows typically a mode that 2nd ink osmose
- ink for example, cyan ink
- the ink is placed in both the direction along the surface of the fabric and the depth direction, centering on the position where the ink droplets land. While spreading, it penetrates into the fabric.
- the ink permeates while being absorbed by the water-soluble polymer in the pretreatment agent attached to the fibers of the fabric.
- the ink penetrates into the fabric in which the water-soluble polymer is already swollen, so that the ink is more in the thickness direction of the fabric than when the fabric is dry. It is more difficult to penetrate and spread more easily in the direction along the surface.
- the cyan ink When the cyan ink is ejected, if the fabric is pre-moistened to the same extent as the wetness of the ink droplets landing, the cyan ink spreads in the same manner as it spreads on the fabric from which ink has already been ejected. To penetrate.
- the yellow ink when the yellow ink is ejected to the same position on the fabric after the cyan ink, the yellow ink penetrates the fabric while spreading in the same manner as the cyan ink, as shown in FIG. 3B.
- the state of the fabric portion when cyan ink permeates for example, the degree of swelling of the water-soluble polymer
- the yellow ink penetrates into substantially the same portion of the fabric where the cyan ink penetrates, and green dots are formed.
- the yellow ink to be ejected next is the fabric in which the water-soluble polymer is not swollen. Compared to cyan ink that has permeated while swelling the polymer, it becomes less likely to penetrate the fabric. This is probably because the flow path through which the yellow ink permeates becomes narrower as the water-soluble polymer swells than the cyan ink. As a result, as shown in FIG. 3C, the yellow ink penetrates to the outside of the green dot more widely in the direction along the surface of the fabric than the portion where the cyan ink penetrates. For this reason, a yellow border discharged later is formed on the image formed on the surface of the fabric (arrow in FIG. 3C).
- both cyan ink and yellow ink penetrate the fabric from the landing position to a wider range.
- the volume of ink droplets is limited, if the ink penetrates further in the direction along the surface of the fabric or in the thickness direction, the hue of the ink may be thinned and may not be sufficiently expressed on the surface of the fabric. .
- the ink spreads too much in this way the boundary between different hues in the image formed on the surface of the fabric may become unclear. As a result, the fineness of the image may be further reduced.
- the inkjet head moves left and right (for example, in the Y direction in FIG. 2A), and the unit The amount of ink ejected per hour is generally smaller than that of a one-pass inkjet recording apparatus.
- the ink is easily dried and the humidity on the recording medium is easily stabilized as compared with the image formation by the one-pass ink jet recording apparatus. Therefore, the environment around the recording medium at the time of discharging the first drop and that at the time of discharging the second drop does not change greatly, and does not substantially affect the spread of ink landed on the recording medium.
- an image is usually formed by an interleave method. For this reason, for example, the case where the cyan ink lands on the position where the yellow ink lands and the case where the yellow ink lands on the position where the cyan ink lands are randomly and approximately the same for the entire recording medium (fabric). Occurs at a rate of. Therefore, even if the dot diameter of the yellow ink landed at the same position is different from the dot diameter of the cyan ink, the portions with different landing orders are randomly but almost evenly distributed on the portion of the recording medium on which the image is formed. Therefore, an image with a little uncomfortable feeling is formed as a whole.
- the ink jet head does not move, and the amount of ink discharged per unit time is generally larger than that of the scan type ink jet recording apparatus. For this reason, the humidity near the inkjet tends to be high. Therefore, the environment around the recording medium at the time of discharging the first drop and that at the time of discharging the second drop are greatly different, and the spread of the ink landed on the recording medium is also different.
- the ink jet head is fixed, and usually the ink ejection order is fixed (for example, yellow ink first, then cyan ink, etc.). For this reason, even if there is a slight difference between the dot diameter of the yellow ink and the dot diameter of the cyan ink, a sense of discomfort due to the difference is emphasized in the entire formed image. Will be formed.
- the ink jet recording method uses two or more kinds of inks containing an aqueous medium and a colorant on the surface of the recording medium having the absorptivity of the aqueous medium.
- a step of humidifying the surface of the recording medium before discharging to the recording medium is included. Therefore, even when an image is formed on an absorbent recording medium by the one-pass inkjet recording method, a fine image can be formed.
- the humidification step it is more effective to humidify the surface with air having a relative humidity of 50 to 80% from the viewpoint of appropriately adjusting the wetness of the recording medium.
- the humidification step humidifying the surface before each type of ink is discharged from the viewpoint of aligning the degree of penetration of each ink into the recording medium and forming a higher-definition image. Even more effective.
- the inkjet recording method can be applied to textile printing, and the recording medium includes a pretreatment agent for preventing bleeding of the ink on the surface, so that a high-definition image can be produced on a fabric with high productivity. From the viewpoint of forming with, it is even more effective.
- the fact that the ink contains glycols and the content of the glycols in the ink is 15 to 60% by mass means that excessive swelling of the water-soluble polymer in the fabric is suppressed and the ink is discharged later. From the viewpoint of facilitating the penetration of the ink into the fabric and, as a result, from the viewpoint of forming a higher definition image, the content of the glycols in the ink is 30 to 60% by mass. It is even more effective from the above viewpoint.
- the ink jet recording apparatus discharges ink while moving in one direction relative to the recording medium, and forms a desired image with a single scan on the recording medium.
- a one-pass type ink jet recording apparatus comprising: an ink jet for holding the recording medium; and a transport mechanism for moving the ink jet in one direction relative to the recording medium. Is a fabric or a non-woven fabric, and further includes a humidifying device for humidifying the surface of the recording medium in the front direction in the scanning direction of the inkjet head. Therefore, even when an image is formed on an absorbent recording medium by the one-pass inkjet recording method, a fine image can be formed.
- the inkjet head has a plurality of nozzle groups for ejecting a plurality of colors of ink, each of the nozzle groups protrudes a different color of ink, and the humidifying device has a plurality of nozzles corresponding to each of the nozzle groups.
- Arranged and arranged in front of the nozzle group in the scanning direction is to spread the ink of each color while keeping the wetness of the fabric before the ink is ejected constant between the inks of each color. It is even more effective from the viewpoint of aligning the methods.
- the ink jet recording apparatus has a humidifier in each inkjet head, you may have a humidifier in an inkjet head unit unit.
- the ink jet recording apparatus is disposed on the upstream side (the opposite side to the X direction) of the ink jet head unit 41 and the individual ink jet head units 41 in the direction of the cloth sign.
- a blowout port 412 may be included.
- the ink jet head unit 41 is the same as the ink jet head unit 11 except that it does not have the air outlet 112, and the air outlet 412 is the same as the air outlet 112 except that it is arranged outside the ink jet head unit.
- the ink jet recording apparatus shown in FIG. 4 has the same effect as the ink jet recording apparatus shown in FIG. 1, and in addition, it is easier to modify an existing ink jet recording apparatus to be applicable to the present invention. It is preferable because it exists.
- the ink jet recording apparatus may have a humidifier arranged one upstream of the plurality of ink jet heads.
- the humidifying device in the ink jet recording apparatus described above may be, for example, a spraying device that supplies mist to the cloth other than the blowout port.
- the fabric is moved in the X direction with respect to the ink jet head, but the ink jet head may be moved in a direction opposite to the X direction.
- the fabric may be fixed, or may move in the X direction or the opposite direction in synchronization with the movement of the inkjet head.
- the Z average particle diameter of the dispersed particles of the obtained dye dispersion liquid A-1 was measured by a dynamic light scattering particle size distribution analyzer, Zetasizer Nano S (manufactured by Malvern), and found to be 0.15 ⁇ m.
- Cyan ink production 27.6 parts by mass of ion-exchanged water, 40 parts by mass of ethylene glycol, 7 parts by mass of glycerin, 0.2 parts by mass of proxel GXL (an antifungal agent, Lonza), and KF-351A (surfactant Shin-Etsu Chemical) 25 parts by weight of Dye Dispersion A-1 was added to a mixture obtained by adding 0.2 parts by weight of (made by Co., Ltd.) and stirred, and then filtered through a 1 ⁇ m filter to obtain Cyan Ink 1.
- cyan ink 2 was obtained in the same manner as in the production of cyan ink 1 except that the addition amount of ion exchange water was changed to 57.6 parts by mass and the addition amount of ethylene glycol was changed to 10 parts by mass.
- a yellow ink 1 was obtained in the same manner except that the dye dispersion A-1 was changed to the dye dispersion A-2 in the preparation of the cyan ink.
- a yellow ink 2 was obtained in the same manner as in the preparation of the yellow ink 1 except that the addition amount of ion exchange water was changed to 57.6 parts by mass and the addition amount of ethylene glycol was changed to 10 parts by mass.
- Example 1 A blower outlet for supplying humid air is arranged on the upstream side in the fabric supply direction of each color inkjet head of a commercially available one-pass printing inkjet recording apparatus so as to overlap the inkjet head in the width direction of the fabric, A one-pass type testing machine as shown in FIG. 1 was prepared.
- the color blur of the formed fine line was observed visually and with a 100 ⁇ optical microscope, and evaluated according to the following criteria.
- the “color blur” is a difference in blur between cyan and yellow colors. A: No color blur is observed by visual observation or observation by an optical microscope. B: Although blur is hardly visually recognized by visual observation, it is visible by observation by an optical microscope. C: Blur is visually recognized by visual observation.
- Example 2 An image was formed on the fabric and the formed image was evaluated in the same manner as in Example 1 except that cyan ink 2 and yellow ink 2 were used in place of cyan ink 1 and yellow ink 1.
- Comparative Example 1 A fine line and a rectangular image were formed on the cloth in the same manner as in Example 1 except that the cloth was not humidified before ink ejection, and the fine line and the image were evaluated. Note that the rectangular image in Comparative Example 1 is an image serving as a reference in the sensory test of image density.
- the “scan method” means an ink jet recording method in which ink is ejected onto a cloth while reciprocating the ink jet head in a direction crossing the cloth conveying direction while the cloth is being conveyed.
- a thin line and a rectangular image were formed on a fabric in the same manner as in Example 1 except that the comparative testing machine was used, and the thin line and the image were evaluated.
- Comparative Example 4 A thin line and a rectangular image were formed on the cloth in the same manner as in Comparative Example 3 except that the cloth was not humidified before ink ejection, and the thin line and the image were evaluated.
- Example 1 The evaluation results of Example 1 and Comparative Examples 1 to 4 are shown in Table 1.
- Example 1 color bleeding is further suppressed as compared to Example 2. From the above, it can be seen that it is more effective from the viewpoint of suppressing color bleeding that the concentration of glycols in the ink is 15% by mass or more.
- the present invention can form a high-definition image by a one-pass method with high productivity even for a recording medium having an absorptivity of an aqueous medium. Therefore, the present invention is expected to contribute to further development of higher speed and higher definition ink jet printing.
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- Ink Jet Recording Methods And Recording Media Thereof (AREA)
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Abstract
Description
[1]水性媒体と着色剤とを含有する二種以上のインクを、前記水性媒体の吸収性を有する記録媒体の表面に、インクジェットヘッドの前記記録媒体上での一回の走査で吐出して、画像を形成するワンパス方式のインクジェット記録方法であって、前記記録媒体は、布帛または不織布であり、前記インクジェット記録方法は、前記インクを前記記録媒体に吐出する前に、前記記録媒体の前記表面を加湿する工程を含む、インクジェット記録方法。
[2]相対湿度が50~80%の空気で前記表面を加湿する、[1]に記載のインクジェット記録方法。
[3]前記インクの一種毎の吐出の前に前記表面を加湿する、[1]または[2]に記載のインクジェット記録方法。
[4]前記インクは、グリコール類を含有し、前記インクにおける前記グリコール類の含有量は、15~60質量%である、[1]~[3]のいずれか一項に記載のインクジェット記録方法。
[5]記録媒体に対して相対的に一方向に移動しながらインクを吐出して、前記記録媒体に対して一度の走査で所期の画像を形成するためのインクジェットと、前記記録媒体を保持して前記インクジェットを前記記録媒体に対して相対的に一方向に移動させるための搬送機構と、を有するワンパス方式のインクジェット記録装置であって、前記記録媒体は、布帛または不織布であり、前記記録媒体の、前記インクジェットヘッドの走査方向における前方の部分の表面を加湿するための加湿装置をさらに有する、インクジェット記録装置。
[6]前記インクジェットヘッドは、複数色のインクを吐出するための複数のノズル群を有し、前記ノズル群のそれぞれは、異なる色のインクを突出し、前記加湿装置は、前記ノズル群のそれぞれに対応して複数配置され、かつ、前記ノズル群の前記走査方向における前方に配置されている、[5]に記載のインクジェット記録装置。
[7]前記加湿装置は、前記記録媒体の表面に、相対湿度が50~80%の空気を供給するためのノズルを含む、[5]または[6]に記載のインクジェット記録装置。
本実施の形態に係るインクジェット記録方法は、二種以上のインクを、記録媒体の表面に、インクジェットヘッドの前記記録媒体上での一回の走査で吐出して、画像を形成する、いわゆるワンパス方式のインクジェット記録方法である。
上記インクは、水性媒体と着色剤とを含有する。上記インクは二種以上であり、これらは、通常は異なる色のインクだが、同じ色のインクであってもよい。上記インクは、二種以上であれば、重ね打ちによって所期の外観が得られる範囲において、何種類であってもよい。
上記記録媒体は、上記水性媒体を吸収する性質(水性媒体の吸収性)を有する。当該吸収性とは、記録媒体に付着した水性媒体が、当該記録媒体の表面に沿う方向および当該記録媒体の厚さ方向のいずれにも広がりながら上記記録媒体に浸透する性質を言う。当該記録媒体が吸収性を示す水性媒体は、上記インク中の水性媒体と同じであってもよいし、異なっていてもよい。
本実施の形態におけるインクジェット記録方法は、上記インクを上記記録媒体に吐出する前に、当該記録媒体の表面を加湿する工程(加湿工程)を含む。当該加湿工程による記録媒体の加湿の程度は、インクの吐出によって記録媒体が濡れる程度の記録媒体の濡れ具合を上限として、本発明の効果が得られる範囲から適宜に決めることが可能である。たとえば、加湿工程における記録媒体の濡れは、わずかであってもよいし、あるいは、記録媒体の繊維がインクの液滴の着弾によって濡れる程度であったり、上記前処理剤中の水溶性高分子化合物がインクの液滴の着弾によって膨潤する程度であってもよい。このように、当該記録媒体の加湿の程度は、上記インクの吐出による当該表面の濡れに相当する程度までであってよく、上記加湿工程は、インクの液滴が着弾する前の記録媒体の表面を、インクの液滴が着弾した後の記録媒体の表面と実質的に同程度までに、記録媒体の表面を湿らす工程であってよい。
本実施の形態におけるインクジェット記録方法は、上記加湿工程で加湿された記録媒体の表面に、インクを吐出する。インクの吐出は、記録媒体の表面の湿り具合が実質的に維持されている間に行われる。たとえば、インクの吐出は、加湿工程の直後に行われる。
本実施の形態のインクジェット記録方法は、例えば、公知のワンパス方式のインクジェット記録装置に、上記加湿装置を配備した装置によって行うことが可能である。図1は、本実施の形態に係るインクジェット記録装置の構成の一例を模式的に示す図である。当該インクジェット記録装置10は、図1に示されるように、イエロー、マゼンタ、シアン、ブラックの各色に対応する四つのインクジェットヘッドユニット11と、記録媒体としての布帛100を連続して供給するための搬送ベルトと、を有する。図1中の矢印Xは、布帛100の搬送方向を示す。
上記のようなワンパス方式のインクジェット記録方法で布帛に画像を形成すると、後から吐出されたインクの色の縁取りが発生しない、精細な画像が形成される。その理由は、以下の通りと考えられる。
なお、前述のインクジェット記録装置は、インクジェットヘッドのそれぞれに加湿装置を有しているが、インクジェットヘッドユニット単位で加湿装置を有していてもよい。たとえば、上記インクジェット記録装置は、図4に示されるように、インクジェットヘッドユニット41と、個々のインクジェットヘッドユニット41の、布帛の意号方向における上流側(X方向とは反対側)に配置される吹き出し口412とを有していてもよい。インクジェットヘッドユニット41は、吹き出し口112を有さない以外はインクジェットヘッドユニット11と同じであり、吹き出し口412は、インクジェットヘッドユニット外に配置されている以外は、吹き出し口112と同じである。図4に示されるインクジェット記録装置は、図1に示されるインクジェット記録装置と同様の効果を奏し、加えて、既存の捺染用のインクジェット記録装置を本発明に適用可能に改造することがより容易であることから、好ましい。
(染料分散液A-1の作製)
分散剤としてDISPERBYK-190(ビックケミー社製 くし型ブロックポリマー分散剤 固形分40質量%)15質量部をイオン交換水60質量部に加え、ここへジプロピレングリコールプロピルエーテル5質量部を混合した。この溶液に分散染料であるC.I.Disperse Blue-60を20質量部添加し、プレミックスした後、0.5mmジルコニアビーズを体積率で50%充填したサンドグラインダーを用いて分散し、染料固形分20質量%の染料分散液A-1を得た。得られた染料分散液A-1の分散粒子のZ平均粒子径を動的光散乱法粒度分布計ゼータサイザーナノS(マルバーン社製)にて測定したところ、0.15μmであった。
イオン交換水27.6質量部にエチレングリコールを40質量部、グリセリンを7質量部、プロキセルGXL(防黴剤 ロンザ社製)を0.2質量部、およびKF-351A(界面活性剤 信越化学工業株式会社製)を0.2質量部加えた混合液に、染料分散液A-1を25質量部加えて撹拌した後、1μmのフィルターでろ過してシアンインク1を得た。
(染料分散液A-2の作製)
染料分散液A-1の作製において、分散染料をC.I.Disperse Yellow-114に変更した以外は同様にして、染料分散液A-2を得た。得られた染料分散液A-2の分散粒子のZ平均粒子径は0.17μmであった。
シアンインクの作製において、染料分散液A-1を染料分散液A-2に変えた以外は同様にしてイエローインク1を得た。また、イオン交換水の添加量を57.6質量部に、エチレングリコールの添加量を10質量部に、それぞれ変更した以外は、イエローインク1の作製と同様にして、イエローインク2を得た。
糸の太さ50dのポリエステルの布帛に、前処理としてカルボキシメチルセルロース水溶液に浸し、絞り、乾燥したものを用意した。
市販のワンパス方式の捺染用インクジェット記録装置の各色のインクジェットヘッドの、布帛の供給方向における上流側に、加湿空気を供給する吹き出し口を、布帛の幅方向において当該インクジェットヘッドに重なるように配置し、図1に示されるような、ワンパス方式の試験機を用意した。
A:目視でも光学顕微鏡による観察でも色の滲みはみられない
B:目視では滲みはほとんど視認できないが、光学顕微鏡の観察では視認できる
C:目視で滲みが視認される
A:加湿がないものと画像濃度に差がないと認められる
B:加湿がないものと一見は変わらないが、詳細に比較するとわずかに画像濃度が低いと認められる
C:加湿がないものよりも明らかに画像濃度が低いと認められる
シアンインク1およびイエローインク1に代えてシアンインク2およびイエローインク2を用いる以外は実施例1と同様にして、布帛への画像の形成と、形成された画像の評価とを行った。
インクの吐出前における布帛の加湿を行わなかった以外は、実施例1と同様にして細線および矩形画像を布帛に形成し、当該細線および画像について評価した。なお、比較例1における矩形画像が、画像濃度の官能試験における基準となる画像である。
インクの吐出前における布帛の加湿に代えて、特許文献1に記載されているように、布帛に液体組成物(浸透液)を付着させた以外は、実施例1と同様にして細線および矩形画像を布帛に形成し、当該細線および画像について評価した。
市販のスキャン方式の捺染用インクジェット記録装置の各色のインクジェットヘッドの、スキャン方向(布帛の供給方向を横断する方向)の先端側(すなわちインクジェットヘッドの両側)に、加湿空気を供給する吹き出し口を、当該スキャン方向において当該インクジェットヘッドに重なるように配置し、スキャン方式の比較試験機を用意した。なお、「スキャン方式」とは、布帛を搬送しながら、布帛の搬送方向を横切る方向にインクジェットヘッドを往復運動させながらインクを布帛に吐出するインクジェット記録方法を意味する。
インクの吐出前における布帛の加湿を行わなかった以外は、比較例3と同様にして細線および矩形画像を布帛に形成し、当該細線および画像について評価した。
11、41 インクジェットヘッドユニット
21 粘着性ベルト
22 サポートロール
23 搬送ロール
24 ニップロール
100 布帛
111 インクジェットヘッド
112、412 吹き出し口
X 布帛の搬送方向を示す矢印
Y 布帛の幅方向を示す矢印
Claims (7)
- 水性媒体と着色剤とを含有する二種以上のインクを、前記水性媒体の吸収性を有する記録媒体の表面に、インクジェットヘッドの前記記録媒体上での一回の走査で吐出して、画像を形成するワンパス方式のインクジェット記録方法であって、
前記記録媒体は、布帛または不織布であり、
前記インクジェット記録方法は、前記インクを前記記録媒体に吐出する前に、前記記録媒体の前記表面を加湿する工程を含む、
インクジェット記録方法。 - 相対湿度が50~80%の空気で前記表面を加湿する、請求項1に記載のインクジェット記録方法。
- 前記インクの一種毎の吐出の前に前記表面を加湿する、請求項1または2に記載のインクジェット記録方法。
- 前記インクは、グリコール類を含有し、
前記インクにおける前記グリコール類の含有量は、15~60質量%である、
請求項1~3のいずれか一項に記載のインクジェット記録方法。 - 記録媒体に対して相対的に一方向に移動しながらインクを吐出して、前記記録媒体に対して一度の走査で所期の画像を形成するためのインクジェットと、前記記録媒体を保持して前記インクジェットを前記記録媒体に対して相対的に一方向に移動させるための搬送機構と、を有するワンパス方式のインクジェット記録装置であって、
前記記録媒体は、布帛または不織布であり、
前記記録媒体の、前記インクジェットヘッドの走査方向における前方の部分の表面を加湿するための加湿装置をさらに有する、インクジェット記録装置。 - 前記インクジェットヘッドは、複数色のインクを吐出するための複数のノズル群を有し、
前記ノズル群のそれぞれは、異なる色のインクを突出し、
前記加湿装置は、前記ノズル群のそれぞれに対応して複数配置され、かつ、前記ノズル群の前記走査方向における前方に配置されている、
請求項5に記載のインクジェット記録装置。 - 前記加湿装置は、前記記録媒体の表面に、相対湿度が50~80%の空気を供給するためのノズルを含む、請求項5または6に記載のインクジェット記録装置。
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JPH07133595A (ja) * | 1993-11-08 | 1995-05-23 | Sando Iron Works Co Ltd | 高温高圧連続染色方法及び装置 |
US20020124327A1 (en) * | 1999-05-28 | 2002-09-12 | Marc-Aurel Voth | Method of and an arrangement for continuous thermal treatment of a textile product web, in particular for dye fixing |
WO2013047234A1 (ja) * | 2011-09-30 | 2013-04-04 | セーレン株式会社 | インクジェット記録装置 |
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JP5480765B2 (ja) * | 2010-09-24 | 2014-04-23 | 理想科学工業株式会社 | ライン型インクジェットプリンタの色別インク吐出量調整装置 |
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JP2014214218A (ja) * | 2013-04-25 | 2014-11-17 | 理想科学工業株式会社 | パターン形成用の組成物セット |
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JPH07133595A (ja) * | 1993-11-08 | 1995-05-23 | Sando Iron Works Co Ltd | 高温高圧連続染色方法及び装置 |
US20020124327A1 (en) * | 1999-05-28 | 2002-09-12 | Marc-Aurel Voth | Method of and an arrangement for continuous thermal treatment of a textile product web, in particular for dye fixing |
WO2013047234A1 (ja) * | 2011-09-30 | 2013-04-04 | セーレン株式会社 | インクジェット記録装置 |
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