JP2008087457A - Inkjet head, inkjet recording apparatus, recording method using it, and ink for inkjet recording - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet head which has a high reliability by suppressing deteriorations resulting from the decrease of ink repellency by an ink contact liquid of a nozzle ink repellent layer, and the change of a nozzle shape or the like, and to provide an inkjet recording apparatus, an inkjet recording method using the inkjet recording apparatus, and an ink for inkjet recording. <P>SOLUTION: A nozzle forming member houses the ink in a plurality of ink liquid chambers, and has a plurality of nozzles which communicate with the plurality of ink liquid chambers and discharge ink droplets. On the ink discharging surface side of the nozzle forming member, an inorganic oxide layer is formed. Then, an ink repellent layer containing a fluorine based water repellency imparting agent is laminated on the inorganic oxide layer for this inkjet head. In the inkjet head, in the ink composition containing at least water and a color material, an amino paropanediol inductor is contained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an ink jet head, an ink jet recording apparatus, a method using the recording apparatus, and an ink for ink jet recording. The present invention also relates to an inkjet patterning apparatus and a method using the apparatus.

  Since the head of an ink jet recording apparatus performs recording by ejecting ink droplets from a nozzle, it is known that not only the shape of the nozzle but also the surface characteristics of the nozzle forming member have a great influence on the ejection characteristics. For example, if ink adheres to the nozzle periphery and non-uniform ink pools occur, the ejection direction of ink droplets is bent or large variations occur, resulting in unstable ejection characteristics.

  Therefore, an ink repellent layer is formed on the discharge surface side of the nozzle to improve surface uniformity and ensure discharge stability.

As the ink repellent layer, PTFE-Ni eutectoid plating, electrodeposition coating of fluororesin, vapor deposited fluororesin (for example, fluorinated pitch), silicon resin / fluorine resin applied, etc. However, for recent inks with low surface tension and high permeability to paper for higher image quality, a specific ink repellent layer corresponding to the ink has been required. Thus, a method is disclosed in which an ink repellent layer of a fluorine-based water repellent agent is formed on a polyimide substrate via a SiO ₂ layer by a vacuum deposition method (see, for example, Patent Document 1). The inorganic oxide layer such as SiO ₂ is for improving the adhesion between the substrate and the ink repellent layer of the fluorine-based water repellent agent.

Although the ink repellent layer having such a structure has extremely high ink repellency even with respect to low surface tension ink, there is a problem in that the ink repellency is lowered by ink contact. For this reason, attempts have been made to improve the thickness of the ink-repellent layer made of a fluororesin (see, for example, Patent Document 2). However, increasing the thickness of the ink-repellent layer may reduce ink repellency from the beginning. There remains a problem that the manufacturing time is significantly increased.
JP2003-341070 JP-A-2005-59255

  Therefore, the present invention has been made in view of the above, and by resolving the above problems and improving the ink wettability of the nozzle ink repellent layer containing the fluorine-based water repellent agent by ink formulation, An object of the present invention is to provide a highly reliable ink jet head and an ink jet recording apparatus equipped with the ink jet head by suppressing deterioration of ink repellency due to ink contact with an ink layer and deterioration due to a change in nozzle shape. Furthermore, another object of the present invention is to provide an ink jet recording method using such an ink jet recording apparatus.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have completed the present invention.

  In other words, as described in claim 1, the object is to form a nozzle forming member having a plurality of nozzles for storing ink in a plurality of ink liquid chambers and communicating with the plurality of ink liquid chambers to eject ink droplets. In an ink jet head in which an inorganic oxide layer is formed on the ink ejection surface side and an ink repellent layer containing a fluorine-based water repellency-imparting agent is laminated on the inorganic oxide layer, the ink composition containing at least water and a coloring material This is achieved by an ink jet head characterized by containing an aminopropanediol derivative in the product. As a result, it is possible to prevent a decrease in ink repellency due to ink contact with the ink repellent layer and a decrease in ejection stability which is considered to be caused by a change in nozzle shape.

  The invention according to claim 2 is the invention according to claim 1, wherein the aminopropanediol derivative in the ink is 2-amino-2-ethyl-1,3-propanediol. As a result, it is possible to prevent a decrease in ink repellency due to ink contact with the ink repellent layer and a decrease in ejection stability which is considered to be caused by a change in nozzle shape.

  The invention according to claim 3 is the invention according to claim 1, characterized in that the ink composition contains a fluorosurfactant. As a result, the ink repellency after ink contact can be maintained even for low surface tension ink using a fluorine-based surfactant.

  The invention according to claim 4 is the invention according to claim 3, wherein the fluorine-based surfactant in the ink has a structure represented by the following general formula (1). As a result, the ink repellency after ink contact can be maintained even for low surface tension ink using a fluorine-based surfactant.

請求項５にかかる発明は、請求項３に記載の発明において、前記インク中のフッ素系界面活性剤が下記一般式（２）で示した構造であることを特徴とする。これにより、特にフッ素系界面活性剤を用いた低表面張力のインクに対しても、インク接液後の撥インク性を保つことができる。

The invention according to claim 5 is the invention according to claim 3, wherein the fluorosurfactant in the ink has a structure represented by the following general formula (2). As a result, the ink repellency after ink contact can be maintained even for low surface tension ink using a fluorine-based surfactant.

請求項６にかかる発明は、請求項１に記載の発明において、前記インク中の色材が顔料であることを特徴とする。これにより、インク接液後の撥インク性低下に対する効果を特に多大にすることができる。

The invention according to claim 6 is the invention according to claim 1, characterized in that the color material in the ink is a pigment. Thereby, the effect with respect to the ink repellency fall after ink contact can be made especially great.

  The invention according to claim 7 is the invention according to claim 5, wherein the pigment is a self-dispersing pigment. Thereby, the effect with respect to the ink repellency fall after ink contact can be made especially great.

  The invention according to claim 8 is the invention according to claim 1, wherein the nozzle forming member is polyimide. Thereby, the effect with respect to the ink repellency fall after ink contact can be made especially great.

  The invention according to claim 9 is the invention according to claim 1, characterized in that the fluorine-based water repellent imparting agent that forms the ink repellent layer is a modified perfluoropolyoxetane. Thereby, the effect with respect to the ink repellency fall after ink contact can be made especially great.

  The invention according to claim 10 is an ink jet recording apparatus that records an image on a recording medium by ejecting ink droplets from a nozzle by driving energy generated by a driving element driven in accordance with a recording signal. It is achieved by an ink jet recording apparatus comprising the ink jet head according to any one of 1 to 9. This can provide an ink jet recording apparatus that can prevent a decrease in ink repellency due to ink contact with the ink repellent layer and a decrease in ejection stability that may be caused by a change in nozzle shape.

  The invention according to an eleventh aspect is the invention according to the tenth aspect, wherein the ink jet head employs any one of a piezoelectric type, a thermal type, and an electrostatic type. As a result, a piezo-type, thermal-type or electrostatic-type ink jet recording apparatus capable of preventing a drop in ink repellency due to ink contact with the ink-repellent layer and a drop in ejection stability considered to be caused by a change in nozzle shape, etc. Can be provided.

  The invention according to claim 12 is the invention according to claim 10, wherein the inkjet recording apparatus includes a color filter, an organic EL manufacturing apparatus, and an inkjet patterning apparatus. Accordingly, it is possible to provide a color filter, an organic EL manufacturing apparatus, and an ink jet patterning apparatus that can prevent a decrease in ink repellency due to ink contact with the ink repellent layer and a decrease in ejection stability that may be caused by a change in nozzle shape. .

  The invention according to claim 13 is achieved by an ink jet recording method using the ink jet recording apparatus according to any one of claims 1 to 12. As a result, it is possible to prevent a decrease in ink repellency due to ink contact with the ink repellent layer and a decrease in ejection stability that is considered to be caused by a change in nozzle shape, and a highly reliable recording method can be provided.

  The invention according to claim 14 is an ink for ink jet recording used in the ink jet recording method according to claim 13 using at least water and an ink composition containing a pigment as a coloring material, wherein the ink composition contains the ink composition. It is achieved by an ink for ink jet recording characterized by containing an aminopropanediol derivative. Accordingly, it is possible to provide a highly reliable ink jet recording in which deterioration of the ink repellent layer due to ink contact is suppressed.

  The invention according to claim 15 is the invention according to claim 14, wherein the aminopropanediol derivative is 2-amino-2-ethyl-1,3-propanediol. Accordingly, it is possible to provide a highly reliable ink jet recording in which deterioration of the ink repellent layer due to ink contact is suppressed.

  The invention according to claim 16 is the invention according to claim 14, characterized in that the ink composition contains a fluorosurfactant. Accordingly, it is possible to provide a highly reliable ink jet recording in which deterioration of the ink repellent layer due to ink contact is suppressed.

  The invention according to claim 17 is the invention according to claim 16, wherein the fluorosurfactant has a structure represented by the following general formula (1). Accordingly, it is possible to provide a highly reliable ink jet recording in which deterioration of the ink repellent layer due to ink contact is suppressed.

請求項１８にかかる発明は、請求項１６に記載の発明において、前記フッ素系界面活性剤が下記一般式（２）で示した構造であることを特徴とする。これにより、撥インク層のインク接液による劣化を抑えた信頼性の高いインクジェット方式の記録を提供することができる。

The invention according to claim 18 is the invention according to claim 16, characterized in that the fluorine-based surfactant has a structure represented by the following general formula (2). Accordingly, it is possible to provide a highly reliable ink jet recording in which deterioration of the ink repellent layer due to ink contact is suppressed.

請求項１９にかかる発明は、請求項１８に記載の発明において、前記顔料が自己分散顔料であることを特徴とする。これにより、撥インク層のインク接液による劣化を抑えた信頼性の高いインクジェット方式の記録を提供することができる。

The invention according to claim 19 is the invention according to claim 18, characterized in that the pigment is a self-dispersing pigment. Accordingly, it is possible to provide a highly reliable ink jet recording in which deterioration of the ink repellent layer due to ink contact is suppressed.

  According to the present invention, an ink-repellent ink comprising an inorganic oxide layer formed on the ink discharge surface side of a nozzle forming member having a plurality of nozzles for discharging ink droplets, and the fluorine-based water repellent imparting agent on the inorganic oxide layer. In the ink jet recording apparatus including the ink jet head having the layers and the ink jet head, the ink composition containing at least water and a coloring material contains an aminopropanediol derivative, thereby deteriorating the ink repellent layer due to ink contact. It is possible to provide highly reliable ink jet recording.

  In particular, when the aminopropanediol derivative in the ink is 2-amino-2-ethyl-1,3-propanediol, the fluorosurfactant in the ink is represented by the above general formulas (1) and (2). This is effective in the case of a different structure. Further, it is effective when the color material in the ink is a pigment, particularly a self-dispersing pigment. Further, when the nozzle forming member is polyimide, a remarkable effect is obtained when the fluororesin forming the ink repellent layer is a modified perfluoropolyoxetane.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  The ink jet recording apparatus of the present invention uses an piezoelectric head as a pressure generating means for pressurizing ink in an ink flow path as an ink jet head, and deforms a diaphragm that forms the wall surface of the ink flow path to increase the volume in the ink flow path. A so-called piezo type that discharges ink droplets by changing (see Japanese Patent Laid-Open No. 2-51734) or a so-called thermal type that generates bubbles by heating ink in an ink flow path using a heating resistor. (Refer to Japanese Patent Application Laid-Open No. 61-59911), the diaphragm and the electrode forming the wall surface of the ink flow path are arranged opposite to each other, and the diaphragm is deformed by the electrostatic force generated between the diaphragm and the electrode. Thus, it includes any case of an electrostatic type (see Japanese Patent Application Laid-Open No. 6-71882) that discharges ink droplets by changing the volume of the ink flow path.

  First, the ink composition used in the present invention will be described.

  Aminopropanediol derivative used in the present invention, which is a water-soluble organic basic compound such as 1-amino-2,3-propanediol, 1-methylamino-2,3-propanediol, 2-amino -2-methyl-1,3-propanediol, 2-amino-2-ethyl-1,3-propanediol, and the like, and particularly preferred is 2-amino-2-ethyl-1,3-propanediol. Can be mentioned. 2-Amino-2-ethyl-1,3-propanediol not only has a great effect on preventing the elution of the ink repellent layer, which is the object of the present invention, but also has an excellent effect of improving clogging and ejection stability. . However, the aminopropanediol derivatives used in the present invention are not limited to those exemplified above. The content of the aminopropanediol derivative in the ink composition is 0.01 to 10% by weight, preferably 0.1 to 5.0% by weight, and more preferably 0.1 to 2.0% by weight. The content of the aminopropanediol derivative increases or decreases in accordance with the type and content of the color material, and finally determines the optimum value for the recording apparatus system. If the content is too small, the effect of preventing the ink-repellent layer from being eluted is not recognized, and conversely, problems such as adversely affecting the reliability and increasing the viscosity occur.

  Next, with regard to the fluorosurfactant, by incorporating this into the ink, the coloring material is stably dispersed in the ink, and the wettability of the ink to the paper is improved. Although a small number of images can be obtained, the surface tension is reduced, so that the wettability of the nozzle surface also increases, and as described above, if ink adheres to the periphery of the nozzle and non-uniform ink pools occur, ink drops The discharge direction is bent or a large variation occurs, resulting in a decrease in discharge stability.

  The amount of the fluorosurfactant added to the ink is 0.05 to 20% by weight, preferably 0.1 to 10% by weight, but is not particularly limited in the present invention. Examples of fluorosurfactants include perfluoroalkyl sulfonates, perfluoroalkyl carboxylates, perfluoroalkyl phosphates, perfluoroalkyl ethylene oxide adducts, perfluoroalkyl betaines, perfluoroalkylamine oxide compounds. The structure shown by the general formulas (1) and (2) is particularly preferable from the viewpoint of reliability. Further, commercially available fluorine compounds include Surflon S-111, S-112, S-113, S121, S131, S132, S-141, and S-145 (manufactured by Asahi Glass Co., Ltd.), Fullrad FC-93. , FC-95, FC-98, FC-129, FC-135, FC-170C, FC-430, FC-431, FC-4430 (manufactured by Sumitomo 3M), MegaFuck F-470, F-1405, F474 (Manufactured by Dainippon Ink & Chemicals, Inc.), Zonyl FS-300, FSN, FSN-100, FSO (manufactured by DuPont), Ftop EF-351, 352, 801, 802 (manufactured by Gemco) etc. can be easily obtained and used in the present invention. it can. Among these, Zonyl FS-300, FSN, FSN-100, and FSO (manufactured by DuPont), which are particularly excellent in reliability and color development, can be suitably used. These commercially available products are often a mixture of several kinds of molecular weights (in the general formula (1), m and n have distributions), but are recognized without any problem in the effects of the present invention. These can be used alone or in admixture of two or more kinds, and can also be used in admixture with various surfactants such as anionic, cationic and nonionic which will be described later.

  Next, other ink components will be described.

As the color material, any conventionally known color material can be used. As the water-soluble dye, dyes classified in the color index into acid dyes, direct dyes, basic dyes, reactive dyes, and food dyes, preferably those having excellent water resistance and light resistance are used. If these dyes are specifically mentioned, as acid dyes and food dyes,
C. I. Acid Yellow 17, 23, 42, 44, 79, 142
C. I. Acid Red 1,8,13,14,18,26,27,35,37,42,52,82,87,89,92,97,106,111,114,115,134,186,249,254 289
C. I. Acid Blue 9, 29, 45, 92, 249
C. I. Acid Black 1, 2, 7, 24, 26, 94
C. I. Food yellow 3, 4
C. I. Food Red 7, 9, 14
C. I. Food black 1, 2
As direct dye,
C. I. Direct yellow 1,12,24,26,33,44,50,86,120,132,142,144
C. I. Direct Red 1,4,9,13,17,20,28,31,39,80,81,83,89,225,227
C. I. Direct orange 26, 29, 62, 102
C. I. Direct blue 1, 2, 6, 15, 22, 25, 71, 76, 79, 86, 87, 90, 98, 163, 165, 199, 202
C. I. Direct black 19, 22, 32, 38, 51, 56, 71, 74, 75, 77, 154, 168, 171
As a basic dye,
C. I. Basic yellow 1, 2, 11, 13, 14, 15, 19, 21, 23, 24, 25, 28, 29, 32, 36, 40, 41, 45, 49, 51, 53, 63, 64, 65, 67, 70, 73, 77, 87, 91
C. I. Basic Red 2,12,13,14,15,18,22,23,24,27,29,35,36,38,39,46,49,51,52,54,59,68,69,70, 73, 78, 82, 102, 104, 109, 112
C. I. Basic blue 1,3,5,7,9,21,22,26,35,41,45,47,54,62,65,66,67,69,75,77,78,89,92,93, 105, 117, 120, 122, 124, 129, 137, 141, 147, 155
C. I. Basic black 2,8
As a reactive dye,
C. I. Reactive Black 3, 4, 7, 11, 12, 17
C. I. Reactive Yellow 1,5,11,13,14,20,21,22,25,40,47,51,55,65,67
C. I. Reactive Red 1,14,17,25,26,32,37,44,46,55,60,66,74,79,96,97
C. I. Reactive Blue 1, 2, 7, 14, 15, 23, 32, 35, 38, 41, 63, 80, 95
Etc. can be used.

  As pigments, inorganic pigments are manufactured by known methods such as contact method, furnace method, thermal method in addition to titanium oxide and iron oxide, calcium carbonate, barium sulfate, aluminum hydroxide, barium yellow, cadmium red, chrome yellow. Carbon black can be used. Organic pigments include azo pigments (including azo lakes, insoluble azo pigments, condensed azo pigments, chelate azo pigments), polycyclic pigments (eg, phthalocyanine pigments, perylene pigments, perinone pigments, anthraquinone pigments, quinacridone pigments). , Dioxazine pigments, indigo pigments, thioindigo pigments, isoindolinone pigments, quinofullerone pigments, etc.), dye chelates (eg basic dye chelate, acid dye chelate, etc.), nitro pigments, nitroso pigments, aniline black, etc. . Of these pigments, those having good affinity with the solvent are preferably used. The amount of pigment added as a colorant in the ink composition is preferably about 0.5 to 25% by weight, more preferably about 2 to 15% by weight. In general, when the pigment concentration is increased, the image density is increased and the image quality is improved. However, the reliability such as fixing property, ejection stability, and clogging tends to be adversely affected. Specific examples of pigments preferably used in the present invention include black for carbon black (CI pigment black 7) such as furnace black, lamp black, acetylene black, channel black, or copper, iron (CI pigment black 11). And metal pigments such as titanium oxide, and organic pigments such as aniline black (CI Pigment Black 1). Further, for CI color, CI pigment yellow 1, 3, 12, 13, 14, 17, 24, 34, 35, 37, 42 (yellow iron oxide), 53, 55, 81, 83, 95, 97, 98 , 100, 101, 104, 408, 109, 110, 117, 120, 138, 150, 153, CI Pigment Orange 5, 13, 16, 17, 36, 43, 51, CI Pigment Red 1, 2, 3, 5 17, 22, 23, 31, 38, 48: 2, 48: 2 (permanent red 2B (Ca)), 48: 3, 48: 4, 49: 1, 52: 2, 53: 1, 57: 1. (Brilliant Carmine 6B), 60: 1, 63: 1, 63: 2, 64: 1, 81, 83, 88, 101 (Bengara), 104, 105, 106, 108 (Cadmium Red), 112, 114, 122 (Quinacridone magenta), 123, 146, 149, 166, 168, 170, 172, 177, 178, 179, 185, 190, 193, 209, 219, CI pigment violet 1 (rhodamine lake), 3, 5: 1, 16, 19, 23, 38, CI pigment blue 1, 2, 15 (phthalocyanine blue), 15: 1, 15: 2, 15: 3 (phthalocyanine blue), 16, 17: 1, 56, 60, 63, CI Pigment Green 1, 4, 7, 8, 10, 17, 18, 36, etc.

  In addition, a self-dispersing pigment that can be dispersed in water by adding a functional group such as a sulfone group or a carboxyl group to the surface of the pigment (for example, carbon) can be used. Further, a pigment may be included in a microcapsule so that the pigment can be dispersed in water. This can be paraphrased as polymer fine particles containing pigment particles. In this case, it is not necessary for all pigments blended in the ink to be enclosed or adsorbed in the polymer fine particles, and the pigments may be dispersed in the ink as long as the effects of the present invention are not impaired. The present invention is very effective when the colorant is the self-dispersing pigment.

  The particle diameter of the pigment is not particularly limited, but it is preferable in the present invention to use a pigment ink having a particle diameter of 20 to 150 nm in terms of the maximum frequency in terms of the maximum number. When the particle diameter exceeds 150 nm, not only the pigment dispersion stability as the ink composition is deteriorated, but also ejection stability is deteriorated, and image quality such as image density is lowered, which is not preferable. If the particle size is less than 20 nm, the storage stability of the ink composition and the jetting characteristics of the printer are stable. However, dispersing to such a fine particle size is complicated by the dispersion operation and classification operation. In particular, it becomes difficult to produce a recording liquid.

  In the case of dispersing a pigment using a dispersant, any conventionally known one can be used. Examples thereof include a polymer dispersant and a water-soluble surfactant.

  As a polymer dispersing agent, as a hydrophilic polymer, a natural polymer such as gum arabic, tragan gum, guar gum, karaya gum, low-strength bean gum, arabinogalactone, pectin, quince seed starch, alginic acid, carrageenan, agar Seaweed polymers such as gelatin, casein, albumin, collagen, etc., microbial polymers such as xanthene gum, dextran, and semisynthetic systems such as methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose, etc. Fiber polymers, starch polymers such as sodium starch glycolate and sodium starch phosphate, and seaweed polymers such as sodium alginate and propylene glycol alginate In the pure synthetic system, polyacrylic acid, polymethacrylic acid, acrylic acid-acrylonitrile copolymer, vinyl acetate-acrylic acid ester copolymer, acrylic acid-acrylic acid alkyl ester copolymer, styrene-acrylic acid copolymer, styrene -Methacrylic acid copolymer, styrene-acrylic acid-acrylic acid alkyl ester copolymer, styrene-methacrylic acid-acrylic acid alkyl ester copolymer, styrene-α-methylstyrene-acrylic acid copolymer, styrene-α- Methyl styrene-acrylic acid copolymer-acrylic acid alkyl ester copolymer, styrene-maleic acid copolymer, vinyl naphthalene-maleic acid copolymer, vinyl acetate-ethylene copolymer, vinyl acetate-fatty acid vinyl ethylene copolymer Polymer, vinyl acetate-maleic acid ester copolymer Vinyl acetate - crotonic acid copolymer, vinyl acetate - acrylic acid copolymers and salts thereof, and the like.

  These copolymers preferably have a weight average molecular weight of 3,000 to 50,000, more preferably 5,000 to 30,000, and most preferably 7,000 to 15,000. The addition amount of the polymer dispersant may be appropriately added singly or in combination as long as the pigment is stably dispersed and the other effects of the present invention are not lost. The ratio of pigment to dispersant is preferably in the range of 1: 0.06 to 1: 3, more preferably in the range of 1: 0.125 to 1: 3.

  Specific examples of water-soluble surfactants include, for example, an alkyl surfactant such as alkylallyl or alkylnaphthalene sulfonate, alkyl phosphate, alkyl sulfate, alkyl sulfonate, alkyl ether sulfate, alkylsulfosuccinic acid. Salt, alkyl ester sulfate, alkyl benzene sulfonate, alkyl diphenyl ether disulfonate, alkyl aryl ether phosphate, alkyl aryl ether sulfate, alkyl aryl ether ester sulfate, olefin sulfonate, alkane olefin sulfonate, poly Oxyethylene alkyl ether phosphate, polyoxyethylene alkyl ether sulfate, ether carboxylate, sulfosuccinate, α-sulfo fatty acid ester, fatty acid salt, higher fat And condensates of an amino acid, a naphthenic acid salt or the like. Examples of the cationic surfactant include alkylamine salts, dialkylamine salts, aliphatic amine salts, benzalkonium salts, quaternary ammonium salts, alkylpyridinium salts, imidazolinium salts, sulfonium salts, phosphonium salts, and the like. Nonionic surfactants include polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene glycol ester, polyoxyethylene fatty acid amide, polyoxyethylene fatty acid ester, polyoxyethylene polyoxy Propylene glycol, glycerin ester, sorbitan ester, sucrose ester, glycerin ester polyoxyethylene ether, sorbitan ester polyoxyethylene ether, sorbitol ester polyoxyethylene ether, fatty acid alkanolamide, amine oxide, polyoxyethylene alkylamine, Glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fat Esters, polyoxyethylene sorbitol fatty acid esters, alkyl (poly) Gurikokishido like. Examples of amphoteric surfactants include imidazoline derivatives such as imidazolinium betaine, dimethylalkyl lauryl betaine, alkyl glycine, and alkyldi (aminoethyl) glycine. The amount of the surfactant added as the dispersant may be suitably added singly or in combination as long as the pigment is stably dispersed and the other effects of the present invention are not lost.

  Examples of other additives include antiseptic / antifungal agents, rust preventives, water-soluble ultraviolet absorbers, water-soluble infrared absorbers, and pH adjusters.

  Examples of antiseptic / antifungal agents include 1,2-benzisothiazolin-3-one, sodium benzoate, sodium dehydroacetate, sodium sorbate, sodium pentachlorophenol, sodium 2-pyridinethiol-1-oxide, Examples of the rust preventive include acidic sulfite, sodium thiosulfate, ammonium thiodiglycolate, diisopropyl ammonium nitrite, pentaerythritol tetranitrate, dicyclohexyl ammonium nitrite and the like. As the pH adjuster, any substance can be used as long as it can adjust the pH to a desired value without adversely affecting the prepared ink. Examples include hydroxides of alkali metal elements such as lithium hydroxide, sodium hydroxide and potassium hydroxide, carbonates of alkali metals such as lithium carbonate, sodium carbonate and potassium carbonate, quaternary ammonium hydroxides and diethanolamine. And amines such as triethanolamine, ammonium hydroxide, quaternary phosphonium hydroxide and the like.

  The ink composition of the present invention is prepared by dispersing or dissolving a coloring material, an aminopropanediol derivative, and other components in an aqueous medium, and further stirring and mixing as necessary. Dispersion can be performed with a sand mill, homogenizer, ball mill, paint shaker, ultrasonic disperser, etc., and stirring and mixing can be performed with a stirrer using an ordinary stirring blade, a magnetic stirrer, a high-speed disperser, etc. The present invention does not depend on the manufacturing method.

  Next, an example of the ink jet recording apparatus used in the present invention will be described.

  The ink jet recording apparatus shown in FIG. 1 has an apparatus main body (101), a paper feed tray (102) for loading paper mounted on the apparatus main body (101), and an image mounted on the apparatus main body (101). A paper discharge tray (103) for stocking the formed paper and an ink cartridge loading section (104) are provided. On the upper surface of the ink cartridge loading section (104), an operation section (105) such as operation keys and a display is arranged. The ink cartridge loading unit (104) has an openable / closable front cover (115) for attaching and detaching the ink cartridge (201).

  As shown in FIGS. 2 and 3, the apparatus main body (101) includes a guide rod (131), which is a guide member horizontally mounted on left and right side plates (not shown), and a stay (132). 133) is slidably held in the main scanning direction, and is moved and scanned in the direction of the arrow in FIG. 5 by a main scanning motor (not shown).

  The carriage (133) includes a plurality of recording heads (134) including four inkjet recording heads that eject ink droplets of each color of yellow (Y), cyan (C), magenta (M), and black (Bk). Are arranged in a direction crossing the main scanning direction, and the ink droplet ejection direction is directed downward.

  As an inkjet recording head constituting the recording head (134), a piezoelectric actuator such as a piezoelectric element, a thermal actuator that utilizes a phase change caused by liquid film boiling using an electrothermal transducer such as a heating resistor, and a temperature change A shape memory alloy actuator using a metal phase change, an electrostatic actuator using an electrostatic force, or the like provided as energy generating means for discharging ink can be used.

  The carriage (133) is equipped with a sub tank (135) for each color for supplying ink of each color to the recording head (134). The sub tank (135) is supplied with ink in the ink media set of the present invention from the ink cartridge (201) of the present invention loaded in the ink cartridge loading section (104) via an ink supply tube (not shown). Is done.

  On the other hand, as a paper feeding unit for feeding the paper (142) stacked on the paper stacking unit (pressure plate) (141) of the paper feed tray (103), 1 sheet (142) is fed from the paper stacking unit (141). A half-moon roller (sheet feeding roller (143)) that separates and feeds one sheet at a time, and a sheet separation roller (144) made of a material having a large coefficient of friction, facing the sheet feeding roller (143), and this separation pad (144) It is biased toward the paper feed roller (143).

  A conveying belt (151) for electrostatically adsorbing and conveying the paper (142) as a conveying unit for conveying the paper (142) fed from the paper feeding unit below the recording head (134). A counter roller (152) for conveying the paper (142) sent from the paper supply unit via the guide (145) between the conveying belt (151) and a paper (substantially vertically upward) ( 142) and a leading guide roller 153 urged toward the conveying belt (151) by the holding member (154). (155) and a charging roller (156) which is a charging means for charging the surface of the conveyor belt (151).

  The conveyance belt (151) is an endless belt, is stretched between the conveyance roller (157) and the tension roller (158), and can circulate in the belt conveyance direction. The transport belt (151) includes, for example, a surface layer serving as a sheet adsorbing surface formed of a resin material having a thickness of about 40 μm without resistance control, for example, a copolymer of tetrafluoroethylene and ethylene (ETFE), It has the same material as the surface layer and a back layer (medium resistance layer, earth layer) that has been subjected to resistance control by carbon. On the back side of the conveyance belt (151), a guide member (161) is arranged corresponding to the printing area by the recording head (134). As a paper discharge unit for discharging the paper (142) recorded by the recording head (134), a separation claw (171) for separating the paper (142) from the transport belt (151), and paper discharge A roller (172) and a paper discharge roller (173) are provided, and a paper discharge tray (103) is arranged below the paper discharge roller (172).

  A double-sided paper feeding unit (181) is detachably attached to the back surface of the apparatus main body (101). The double-sided paper feeding unit (181) takes in the paper (142) returned by the reverse rotation of the transport belt (151), reverses it, and feeds it again between the counter roller (152) and the transport belt (151). . A manual paper feed unit (182) is provided on the upper surface of the double-sided paper feed unit (181).

  In this ink jet recording apparatus, the sheet (142) is separated and fed one by one from the sheet feeding unit, and the sheet (142) fed substantially vertically upward is guided by the guide (145) and the transport belt (151). ) And the counter roller (152). Further, the leading end is guided by the conveying guide (153) and pressed against the conveying belt (151) by the leading end pressure roller (155), and the conveying direction is changed by about 90 °.

  At this time, the conveyance belt (157) is charged by the charging roller (156), and the paper (142) is electrostatically adsorbed to the conveyance belt (151) and conveyed. Therefore, by driving the recording head (134) according to the image signal while moving the carriage (133), ink droplets are ejected onto the stopped sheet (142) to record one line, and the sheet ( 142), the next line is recorded after a predetermined amount is conveyed. Upon receiving a recording end signal or a signal that the rear end of the paper (142) has reached the recording area, the recording operation is finished and the paper (142) is discharged to the paper discharge tray (103).

When a near-end ink remaining amount in the sub tank (135) is detected, a required amount of ink is supplied from the ink cartridge (201) to the sub tank (135).
In this ink jet recording apparatus, when the ink in the ink cartridge (201) of the present invention is used up, the casing of the ink cartridge (201) can be disassembled and only the ink bag inside can be replaced. Further, the ink cartridge (201) can supply ink stably even when the ink cartridge (201) is vertically placed and has a front loading configuration. Therefore, even when the upper part of the apparatus main body (101) is closed and installed, for example, even when it is stored in a rack or an object is placed on the upper surface of the apparatus main body (101), the ink The cartridge (1) can be easily replaced.

  Here, an example is described in which the present invention is applied to a serial (shuttle type) ink jet recording apparatus that is scanned by a carriage, but the present invention can be similarly applied to a line type ink jet recording apparatus having a line type head.

  Further, the ink jet recording apparatus and the ink jet recording method of the present invention can be applied to various types of recording by the ink jet recording method. For example, the ink jet recording apparatus, the facsimile apparatus, the copying apparatus, the printer / fax / copier multifunction machine, etc. It can be particularly preferably applied.

  Hereinafter, an inkjet head to which the present invention is applied will be described.

  FIG. 4 is an element enlarged view of an ink jet head according to an embodiment of the present invention, and FIG. 5 is an enlarged cross-sectional view of the main part in the channel-to-channel direction of the head.

  This ink-jet head includes a frame (10) formed with an engraving to be an ink supply port (not shown) and a common liquid chamber (1b), an engraving and a nozzle to be a fluid resistance portion (2a) and a pressurized liquid chamber (2b). A flow path plate (20) having a communication port (2c) communicating with (3a), a nozzle plate forming a nozzle (3a), a convex portion (6a), a diaphragm portion (6b), and an ink inflow port (6c) ), A laminated piezoelectric element (50) bonded to the diaphragm (60) via an adhesive layer (70), and a base (50) to which the laminated piezoelectric element (50) is fixed. 40).

  The base (40) is made of a barium titanate ceramic, and the laminated piezoelectric elements (50) are arranged in two rows and joined.

  The laminated piezoelectric element (50) is composed of a lead zirconate titanate (PZT) piezoelectric layer having a thickness of 10 to 50 μm / layer, and an internal electrode layer made of silver / palladium (AgPd) having a thickness of several μm / layer. Are stacked alternately. The internal electrode layer is connected to the external electrode at both ends.

  The laminated piezoelectric element (50) is divided onto comb teeth by half-cut dicing, and each one is used as a drive part (5f) and a support part (5g) (non-drive part). The length of the outside of the external electrode is limited by cutting or the like so as to be divided by half-cut dicing, and these become a plurality of individual electrodes. The other is not divided by dicing but is conductive and becomes a common electrode.

  The FPC 8 is soldered to the individual electrodes of the drive unit. In addition, the common electrode is provided with an electrode layer at the end of the laminated piezoelectric element, and is wound around and joined to the Gnd electrode of the FPC 8. A driver IC (not shown) is mounted on the FPC 8 to control application of a driving voltage to the driving unit (5f).

  The diaphragm (60) is an island-shaped convex portion (island) that joins the thin film diaphragm portion (6b) and the laminated piezoelectric element (50) serving as the drive portion (5f) formed at the center portion of the diaphragm portion (6b). Part) (6a), a thick film part including a beam to be joined to the support part, and an opening serving as an ink inflow port (6c) are formed by stacking two Ni plating films by electroforming. The diaphragm portion has a thickness of 3 μm and a width of 35 μm (one side).

  The island-shaped convex part (6a) of the diaphragm (60) and the movable part (5f) of the laminated piezoelectric element (50), and the connection between the diaphragm (50) and the frame (10) are bonded layers including a gap material ( 70) is bonded by patterning.

  The flow path plate (20) uses a silicon single crystal substrate, is engraved to be a fluid resistance portion (2a), a pressurized liquid chamber (2b), and a through-hole to be a communication port (2c) at a position relative to the nozzle (3a) Was patterned by an etching method.

  The portion left by etching becomes the partition wall (2d) of the pressurized liquid chamber (2b). Further, in this head, a portion for narrowing the etching width was provided, and this was used as the fluid resistance portion (2a).

  The nozzle plate (30) is formed of a metal material, for example, an Ni plating film by an electroforming method, and has a large number of nozzles (3a) which are fine discharge ports for causing ink droplets to fly. The inner shape (inner shape) of the nozzle (3a) is formed in a horn shape (may be a substantially cylindrical shape or a substantially frustum shape). The diameter of the nozzle (3a) is approximately 20 to 35 μm on the ink droplet outlet side. The nozzle pitch of each row was 150 dpi. The ink ejection surface (nozzle surface side) of the nozzle plate (30) is provided with an ink repellent layer that has been subjected to an ink repellent surface treatment (not shown).

  In the present invention, in order to maintain sufficient ink repellency even for low surface tension ink, this ink repellent layer is composed of a layer containing a fluorine-based water repellency imparting agent via an inorganic oxide layer on the nozzle plate. ing.

Examples of the inorganic oxide layer include SiO ₂ and TiO ₂ , which are provided to improve the adhesion between the nozzle plate and the fluororesin, preferably 1 to 300 mm, and more preferably 10 to 100 mm. The effect of improving the adhesion is particularly great when the nozzle plate is made of resin, but with such a configuration, the ink wettability is not good.

  Further, the fluorine-based water repellency-imparting agent is not particularly limited by a low-molecular substance, a resin, etc., but those disclosed in JP-A-2002-145645, JP-A-9-286639, JP-A-2000-94567, etc. Is mentioned.

  As a particularly preferred example, modified perfluoropolyoxetane (Optool DSX manufactured by Daikin Industries) can be exemplified. In this case, the film thickness is preferably 1 to 100 mm, more preferably 1 to 30 mm.

  Examples of the method for forming an ink repellent layer using a fluorine-based water repellent agent include spin coating, roll coating, dipping, printing, vacuum deposition, and the like. In the present invention, an inorganic oxide layer is formed by sputtering. Thereafter, a fluorine-based water repellent agent is vacuum-deposited and used in the same vacuum chamber.

  In the ink jet head configured as described above, a drive waveform (pulse voltage of 10 to 50 V) is applied to the drive unit (5f) according to the recording signal, thereby causing displacement in the stacking direction in the drive unit (5f). The pressurized liquid chamber (2b) is pressurized through the diaphragm (60) to increase the pressure, and ink droplets are ejected from the nozzle (3a).

  Thereafter, the ink pressure in the pressurized liquid chamber (2b) decreases with the end of ink droplet ejection, and negative pressure is generated in the pressurized liquid chamber (2b) due to the inertia of the ink flow and the discharge process of the drive pulse. Then, the process proceeds to the ink filling process. At this time, the ink supplied from the ink tank flows into the common liquid chamber (1b), passes from the common liquid chamber (1b) through the ink inlet (6c), the fluid resistance portion (2a), and the pressurized liquid chamber ( 2b) is filled.

  The fluid resistance portion (2a) has an effect on the attenuation of the residual pressure vibration after the discharge, but becomes resistant to the refilling due to the surface tension. By appropriately selecting the fluid resistance portion, it is possible to balance the attenuation of the residual pressure and the refill time, and to shorten the time (drive cycle) until the transition to the next ink droplet ejection operation.

  The ink jet nozzle plate and the ink jet head of the present invention can be effectively applied to these ink jet recording apparatuses (image forming apparatuses). However, the present invention is not limited to this, and is not limited to such devices as color filter, organic EL manufacturing apparatuses, and other various patterning apparatuses. Is also applicable.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in more detail, this invention is not restrict | limited at all by these Examples.

(Example 1)
Using a Cabot carbon black dispersion (sulfon group addition type self-dispersion type), the mixture was stirred with the following formulation, and then filtered through a 0.8 μm polypropylene filter to prepare an ink.

40 parts by weight of black dispersion
CAB-O-JET 200 (Sulfon group added type Cabot)
1,3-butanediol 18 parts by weight Glycerin 9 parts by weight Fluorosurfactant FS-300 (manufactured by Du Pont) 2 parts by weight General formula (1) m = 6-8 n = 26 or more
2-amino-2-ethyl-1,3-propanediol 1 part by weight Proxel LV (manufactured by Avicia) 0.2 part by weight Ion-exchanged water 29.8 parts by weight As shown in FIGS. The discharge stability was evaluated by the following method using a printer (IPSiO G707 manufactured by Ricoh). The nozzle plate of the printer head is a polyimide film (without the addition of Kapton particles made by DuPont). After forming a SiO2 layer of about 10 mm by sputtering, the modified perfluoropolyoxetane (Daikin) is about 30 mm by vacuum evaporation. An ink repellent layer of an industrial OPTOOL DSX) was formed, and nozzle holes were processed with an excimer laser from the polyimide film side.

<Discharge stability evaluation>
After 10 minutes of continuous printing, with a moisturizing cap with ink on the head surface, leave the printer in a 50 ° C 60% RH environment for 1 month, and then perform cleaning to return to the same level as before. I let you. Thereafter, an intermittent printing test was performed under the following conditions to evaluate discharge stability.

  In other words, after printing the following print pattern chart continuously for 20 sheets, put it into a pause state where no printing is performed for 20 minutes, repeat this 50 times, and after printing a total of 1000 sheets, another one of the same chart is printed. The presence or absence of streaks, white spots and jet turbulence in the 5% chart solid part was visually evaluated according to the following criteria. In the print pattern, each ink was printed at a duty of 100% in a chart in which the print area in the image area is 5% of the print area of each color in the entire area of the paper. The printing conditions were a recording density of 360 dpi and one-pass printing.

A: There are no streaks, white spots, or jet disturbance in the solid part
B: Streaks, white spots, and turbulence in injection are slightly observed in the solid part
C: Streaks, white spots, and jet turbulence are observed over the entire solid portion (Example 2)
In Example 2, the following inks were used.
<Ink>
As a yellow pigment, C.I. I. Pigment Yellow 128 was subjected to low-temperature plasma treatment to prepare a pigment into which a carboxylic acid group was introduced. A dispersion of this in ion-exchanged water was desalted and concentrated with an ultrafiltration membrane to obtain a yellow pigment dispersion having a pigment concentration of 15%. This was mixed and stirred with the following formulation, and then filtered through a 0.8 μm polypropylene filter to prepare an ink.

Yellow dispersion 40 parts by weight Diethylene glycol 20 parts by weight Glycerin 10 parts by weight Fluorosurfactant FS-300 (Du Pont) 1.5 parts by weight
2-amino-2-methyl-1,3-propanediol 0.6 parts by weight Proxel LV (manufactured by Avicia) 0.2 parts by weight Ion-exchanged water 28.7 parts by weight (Example 3)
In Example 3, the following inks were used.
<Ink>
CI pigment magenta 122 as a magenta pigment was subjected to low-temperature plasma treatment to prepare a pigment into which a carboxylic acid group was introduced. A dispersion in ion-exchanged water was desalted and concentrated with an ultrafiltration membrane to obtain a magenta pigment dispersion having a pigment concentration of 15%. This was mixed and stirred with the following formulation, and then filtered through a 0.8 μm polypropylene filter to prepare an ink.

Magenta dispersion 40 parts by weight Diethylene glycol 20 parts by weight Glycerin 10 parts by weight Fluorosurfactant FS-300 (Du Pont) 1 part by weight
1-methylamino-2,3-propanediol 0.4 parts by weight Proxel LV (manufactured by Avicia) 0.5 part by weight Ion-exchanged water 28.1 parts by weight (Example 4)
In Example 4, the following inks were used.
<Ink>
With reference to Preparation Example 3 in JP-A-2001-139849, a copper phthalocyanine pigment-containing polymer fine particle dispersion was prepared as a trial.

  First, as a polymer solution, a 1 L flask equipped with a mechanical stirrer, a thermometer, a nitrogen gas introduction tube, a reflux tube and a dropping funnel was sufficiently substituted with nitrogen gas, and then 11.2 g of styrene, acrylic acid 2.8 g, 12.0 g of lauryl methacrylate, 4.0 g of polyethylene glycol methacrylate, 4.0 g of styrene macromer (manufactured by Toa Gosei Co., Ltd., trade name: AS-6) and 0.4 g of mercaptoethanol were added and the temperature was raised to 65 ° C. Warm up. Next, styrene 100.8 g, acrylic acid 25.2 g, lauryl methacrylate 108.0 g, polyethylene glycol methacrylate 36.0 g, hydroxyethyl methacrylate 60.0 g, styrene macromer (manufactured by Toagosei Co., Ltd., trade name: AS-6) A mixed solution of 36.0 g, mercaptoethanol 3.6 g, azobisdimethylvaleronitrile 2.4 g and methyl ethyl ketone 18 g was dropped into the flask over 2.5 hours. After completion of dropping, a mixed solution of 0.8 g of azobisdimethylvaleronitrile and 18 g of methyl ethyl ketone was dropped into the flask over 0.5 hours. After aging at 65 ° C. for 1 hour, 0.8 g of azobisdimethylvaleronitrile was added, and further aging was performed for 1 hour. After completion of the reaction, 364 g of methyl ethyl ketone was added to the flask to obtain 800 g of a polymer solution having a concentration of 50%.

  28 g of the polymer solution obtained above, 26 g of copper phthalocyanine pigment, 13.6 g of 1 mol / L potassium hydroxide aqueous solution, 20 g of methyl ethyl ketone and 30 g of ion-exchanged water were sufficiently stirred. Thereafter, the mixture was kneaded 20 times using a three-roll mill (manufactured by Noritake Co., Ltd., trade name: NR-84A). The obtained paste was put into 200 g of ion-exchanged water and sufficiently stirred, and then methyl ethyl ketone and water were distilled off using an evaporator to obtain 160 g of a cyan polymer fine particle dispersion having a solid content of 20.0 wt%. .

  This dispersion was mixed and stirred with the following formulation, and then filtered through a 0.8 μm polypropylene filter to prepare an ink.

Cyan polymer fine particle dispersion 45 parts by weight
1,3-butanediol 21 parts by weight Glycerin 8 parts by weight Fluorosurfactant FSN-100 (manufactured by Du Pont) 1 part by weight General formula (1) m = 1 to 9 n = 0 to 25
2-amino-2-ethyl-1,3-propanediol 0.8 parts by weight Proxel LV (manufactured by Avicia) 0.5 parts by weight Ion-exchanged water 21.7 parts by weight Comparative Example 1
In Example 1, no 2-amino-2-ethyl-1,3-propanediol was added.

Comparative Example 2
In Example 1, 0.1 part by weight of benzotriazole was added instead of 2-amino-2-ethyl-1,3-propanediol.

Comparative Example 3
In Example 2, no 2-amino-2-methyl-1,3-propanediol was added.

Comparative Example 4
In Example 3, 1-methylamino-2,3-propanediol was not added.

Comparative Example 5
In Example 4, no 2-amino-2-ethyl-1,3-propanediol was added.

表１の結果から分かるように、ノズル形成部材のインク吐出面側に無機酸化物層が形成され、該無機酸化物層上にフッ素系撥水付与剤を含む撥インク層を積層したインクジェットヘッドを具備したインクジェット記録装置において、少なくとも水、色材を含むインク組成物中にアミノプロパンジオール誘導体を含有することにより、撥インク層のインク接液による劣化を抑えて信頼性の高いインクジェット記録を提供することができる。

As can be seen from the results of Table 1, an inkjet head in which an inorganic oxide layer is formed on the ink ejection surface side of the nozzle forming member and an ink repellent layer containing a fluorine-based water repellent is laminated on the inorganic oxide layer. In the ink jet recording apparatus provided, by including an aminopropanediol derivative in an ink composition containing at least water and a color material, the ink repellent layer is prevented from being deteriorated due to ink contact, and highly reliable ink jet recording is provided. be able to.

  Further, the ink jet recording apparatus of the present invention includes a recording apparatus adopting an ink jet system, and can be applied as, for example, an ink jet patterning apparatus.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims.・ Change is possible.

FIG. 4 is a perspective explanatory view showing a state where an ink cartridge loading unit cover of the ink jet recording apparatus is opened. It is a schematic block diagram explaining the whole structure of an inkjet recording device. It is a schematic enlarged view which shows an example of the inkjet head of this invention. It is an element enlarged view showing an example of an ink jet head of the present invention. It is a principal part expanded sectional view which shows an example of the inkjet head of this invention.

Explanation of symbols

1b Common liquid chamber 2a Fluid resistance part 2b Pressurized liquid chamber 2c Communication port 2d Partition 3a Nozzle 5f Drive part 5g Support part (non-drive part)
6a Convex part 6b Diaphragm part 6c Ink inlet 10 Frame 20 Channel plate 30 Nozzle plate 40 Base 50 Multilayer piezoelectric element 60 Vibration plate 70 Adhesive layer 101 Main body 102 Paper feed tray 103 Paper discharge tray 104 Ink cartridge loading part 105 Operation part 111 Upper cover 112 Front surface 115 Front cover 131 Guide rod 132 Stay 133 Carriage 134 Recording head 135 Sub tank 141 Paper placement unit 142 Paper 143 Paper feed roller 144 Separation pad 145 Guide 151 Conveying belt 152 Counter roller 153 Conveying guide 154 Holding member 155 Pressure roller 156 Charging roller 157 Conveying roller 158 Densation roller 161 Guide member 171 Separation claw 172 Paper discharge roller 173 Paper discharge roller 181 Double-sided paper feed Knit 182 hand feeding portion 200 ink cartridge 201 ink cartridge 241 ink bag 242 ink inlet 243 ink discharge port 244 cartridge exterior 301 polishing unit 302 polishing roll (abrasive brushes)
303 Cleaning roll

Claims (19)

  Ink is stored in a plurality of ink liquid chambers, an inorganic oxide layer is formed on the ink discharge surface side of a nozzle forming member having a plurality of nozzles that communicate with the plurality of ink liquid chambers and discharge ink droplets, An ink jet head in which an ink repellent layer containing a fluorine-based water repellency-imparting agent is laminated on an inorganic oxide layer, wherein the ink composition containing at least water and a coloring material contains an aminopropanediol derivative. Inkjet head.   The inkjet head according to claim 1, wherein the aminopropanediol derivative in the ink is 2-amino-2-ethyl-1,3-propanediol.   The inkjet head according to claim 1, wherein the ink composition contains a fluorine-based surfactant. The inkjet head according to claim 3, wherein the fluorine-based surfactant in the ink has a structure represented by the following general formula (1).

The inkjet head according to claim 3, wherein the fluorine-based surfactant in the ink has a structure represented by the following general formula (2).

  The inkjet head according to claim 1, wherein the color material in the ink is a pigment.   The inkjet head according to claim 5, wherein the pigment is a self-dispersing pigment.   The inkjet head according to claim 1, wherein the nozzle forming member is polyimide.   The inkjet head according to claim 1, wherein the fluorine-based water repellent imparting agent that forms the ink repellent layer is a modified perfluoropolyoxetane.   10. An ink jet recording apparatus that records an image on a recording medium by ejecting ink droplets from a nozzle by driving energy generated by a driving element that is driven in accordance with a recording signal. An inkjet recording apparatus comprising the inkjet head described in 1.   The inkjet recording apparatus according to claim 10, wherein the inkjet head employs any one of a piezo type, a thermal type, and an electrostatic type.   The inkjet recording apparatus according to claim 10, wherein the inkjet recording apparatus includes a color filter, an organic EL manufacturing apparatus, and an inkjet patterning apparatus.   An ink jet recording method using the ink jet recording apparatus according to claim 1.   14. An ink for ink jet recording used in the ink jet recording method according to claim 13, wherein the ink composition contains at least water and a pigment as a coloring material, and contains an aminopropanediol derivative in the ink composition. An ink for ink jet recording characterized by the above.   The ink for inkjet recording according to claim 14, wherein the aminopropanediol derivative is 2-amino-2-ethyl-1,3-propanediol.   The ink for inkjet recording according to claim 14, wherein the ink composition contains a fluorine-based surfactant. The ink for inkjet recording according to claim 16, wherein the fluorosurfactant has a structure represented by the following general formula (1).

The ink for inkjet recording according to claim 16, wherein the fluorosurfactant has a structure represented by the following general formula (2).

  The ink for inkjet recording according to claim 18, wherein the pigment is a self-dispersing pigment.

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