JP2003112412A - Inkjet printer device - Google Patents

Abstract

[PROBLEMS] To provide an ink jet printer apparatus which does not disturb a user of the smell of a solvent and which does not disturb an image due to a difference in moisture content of a recording medium or dust in the air or paper. SOLUTION: In an ink jet printer which forms an image using a recording liquid in which a coloring agent or a component of 1.0 micron or less insoluble in water is dissolved or / and dispersed in a solvent,
Achieved by providing a means for deodorizing or softening the volatile odor of the solvent or a part thereof, or a means for removing or reducing dust in a recording medium or air, or a means for adjusting the water content of a recording medium. Is done.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inkjet printer device.

[0002]

2. Description of the Related Art An ink jet recording method has advantages such as low noise, high speed recording, high density recording, and easy colorization. Conventionally, as a recording liquid for ink jet, a liquid in which a water-soluble dye is dissolved in a glycol solvent and water has been often used. But,
This is because the drying property of the recording liquid after the recording liquid droplets have landed on the recording medium by ejection is slow, and the image is disturbed by touching with a finger immediately after printing, or bleeding due to color mixture occurs.
On the other hand, studies have been made to accelerate the apparent drying by increasing the permeability of the surface-coated recording medium. In addition, a special substrate (paper for exclusive use of ink jet) is used to prevent excessive penetration and bleeding of ink droplets, achieve printing with high density and saturation, and improve water resistance and storage characteristics. Was customary. There have been many reports on this, for example USP
5,854,649, USP 5,853,899,
JP-A-11-192778, JP-A-11-12961
No. 0, JP-A-11-078223, JP-A-11-07
8221, JP-A-11-034485, JP-A-11
No. 028861, JP-A No. 11-020300, JP-A No. 2,845,832, and JP-A No. 11-506991 describe that a specific water-soluble resin is applied to improve ink adsorption. Have been done, for example USP5
516,364, JP-A-11-192775, JP-A-11-157207, and JP-A-11-129606.
No. 11-048604, No. 11-034
481, Patent 2,938,917, Patent 2,88
7,098, Patent 2,883,299, Patent 2,8
No. 77,740 and the like describe that by containing a specific clay or inorganic material such as alumina, ink adsorption is similarly improved and high-quality printing is performed. In recent years, there has been an increasing demand for high-quality printing on general paper (plain paper) as well as dedicated paper specially manufactured for inkjet. This is not only for paper price reduction, but also for fields that have been processed by other printing methods in the past (fields of ink printing such as offset and flexo printing, fields of non-impact printers such as laser printers and thermal recording, fields of impact printers, etc.). This is an issue that is inevitably encountered when applying the inkjet recording method. Particularly in the office field where a large number of office documents such as standard documents, slips, and forms are printed at high speed, the use of plain paper and high-speed printing are essential requirements. Japanese Patent Laid-Open No. 2000-212163 proposes a compact printer provided with a fan and an exhaust pipe in order to prevent ink mist from adhering to the surface of the recording paper. However, odors and dust generated from the recording liquid and the non-recording body are proposed. Is not a means of removing. Japanese Unexamined Patent Application Publication No. 11-123811 is characterized in that it has means for supplying a paper that does not cause paper dust fixing to the ink fixing means to the ink fixing means, and discloses the effect of paper dust on the nozzles of the print head. Not not. JP-A-2000-272195, JP-A-20
00-272197 enjoys the effect of aromatherapy, which is characterized by having a mechanism for releasing a fragrance. Occasionally, it is not preferred to actively generate a scent, and the taste of the printer user may vary and may cause discomfort. In addition, it does not mention the source of odor. Japanese Unexamined Patent Publication No. 7-1724 proposes a method of adhering the recording medium with clean air prior to printing, a method of removing the adhesive by a sticking member, or a method of sucking and removing it, but especially in a printer used in an office or the like. In addition to the increase in size and noise, the component of the adhesive adheres to the recording medium, so that the recording liquid does not properly adhere to the recording medium, making it difficult to apply in high-quality recording.

[0003]

As described above, the ink jet recording system is used for OA equipment, general household printers,
It is expected to be applied not only to office printers such as facsimiles, but also to indoor and outdoor posters, large signs, cars, glass, elevators, wall and building decorations, and even printing on cloth. Even in the case of water-based ink, various volatile solvents are used for the purpose of accelerating the permeability to the recording medium or the drying property for speeding up, so that volatile vapor must be generated. It is possible to suppress volatilization in the closed storage state, but when heating is performed for drying at a higher speed, volatilization is further accelerated and the user feels uncomfortable. It is believed that the vaporized vapor of the solvent will not adversely affect the human body even if it is inhaled, but even a mere harmless odor in the living environment will hesitate to use it. It is not impossible to deodorize by a chemical reaction using ozone etc. or to realize a closed system or a circulating system structurally, but it becomes complicated and expensive.

In the present invention, when an ink jet printer is used, the printer can prevent the user from being scented by the odor of the solvent and the image formed by the difference in the water content of the recording medium, the dust in the air or the paper. The object is to provide a printer device without disturbance. It is to eliminate unpleasant odors rather than to generate scents.

[0005]

In order to solve the above problems, the present invention provides an image by using a recording liquid prepared by dissolving or / and dispersing a colorant or a water-insoluble component of 1.0 micron or less in a solvent. In an inkjet printer to be formed, a means for deodorizing or softening the volatile odor of the solvent or a part thereof, a means for removing or reducing dust in a recording medium or air, and a means for adjusting the water content of the recording medium. Or a printer device having a combination thereof. Furthermore, the inkjet printer has a recording speed of 10 ips or more, the solvent contains water, the recording medium is a paper having a thickness of 80 to 200 μm, or a fabric such as synthetic fiber or natural fiber, and the coloring agents are black and yellow, It is characterized in that an ink set containing at least one of magenta and cyan is used.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The means for deodorizing or softening the volatile odor of the solvent or a part thereof, which is a feature of the present invention, will be described below. Conventionally, in liquid ink jet recording, various measures have been taken to obtain high dryness of prints. For example, the recording dots could be dried by allowing the ink to permeate into a dedicated paper having a coating portion that serves as an ink absorption layer. That is, the surface tension of the ink is 20 to 30 m.
It is well known in the art that the permeation speed into the paper can be increased to achieve desired characteristics by controlling as low as N / m. However, as one of many problems in inkjet printing, ink bleeding on the back surface of the paper is large, and in particular, a decrease in quality during double-sided printing was recognized for a while. This phenomenon has been addressed individually by many means. For example, a method of fixing a recorded image by eliminating the fluidity by causing the solvent on the recording paper to evaporate after the recording dots adhere to increase the viscosity of the ink component to several tens of times the initial viscosity, or an ink composition is used. There are a reaction solution, a treatment solution, a method of insolubilizing the recording medium with light or heat, etc., but all of them are not suitable for speeding up because of time delay in recording. In particular, in the field of inkjet recording on plain paper having no coating layer at high speed, which is the object of the present invention, sufficient studies have not yet been made. That is, it should be noted that the present invention is based on the viewpoint of recording at high speed on an unspecified recording medium, unlike the conventional ink composition for personal use.

Specifically, various volatile solvents are used in water-based inks for the purpose of accelerating the permeability to the recording medium or the drying property in order to increase the speed. In addition, a water-soluble resin or a water-dispersible resin for the purpose of improving water resistance and fixability is added. As a material constituting the recording liquid, an ethylene glycol-based material such as methyl glycol, methyldiglycol, methyltriglycol, methylpolyglycol, butylglycol, butyldiglycol, butyltriglycol, isobutylglycol, etc. Propylene glycol ethers such as ether and methyl propylene glycol, methyl propylene diglycol, methyl propylene triglycol, propyl propylene glycol, propyl propylene diglycol, butyl propylene glycol, butyl propylene diglycol, phenyl propylene glycol (above manufactured by Nippon Emulsifier) Etc., anionic surfactants such as carboxylic acid salts, sulfuric acid ester salts, sulfonic acid salts, phosphoric acid ester salts, etc., alkylamine salts, dialkyl Min salts, tetraalkyl ammonium salts, benzalkonium salts, alkylpyridinium salts, cationic surfactants such as imidazolinium salts,
Amphoteric surfactants such as carboxybetaine, sulfobetaine aminocarboxylic acid, and phosphoric acid ester salts, ether type,
There are ester type, ether ester type, and nitrogen-containing type, and specifically, polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, polyoxyethylene polyoxypropylene glycol, glycerin ester, sorbitan ester, sucrose ester, glycerin ester. Polyoxyethylene ether, sorbitan ester polyoxyethylene ether, sorbitol ester polyoxyethylene ether, fatty acid alkanolamide, polyoxyethylene fatty acid amide, amine oxide and other nonionic surfactants.

In addition to this, for example, ethylene glycol, propylene glycol, diethylene glycol and dipropylene glycol, triethylene glycol, pentamethylene glycol, polyethylene glycol, glycerin (made by Wako Pure Chemical Industries, Ltd.) in order to prevent the nozzle from drying.
Etc. can be used. To improve the characteristics, for example, acetone,
Ketones such as methyl ethyl ketone, methyl isobutyl ketone, methanol, ethanol, isopropanol and lower alcohols, glycols such as ethylene glycol, propylene glycol, diethylene glycol and dipropylene glycol, acetates, thiodiglycol, N-methyl-2-pyrrolidone, There are nitrogen-containing compounds such as 1,3-dimethylimidazolidinone and amino alcohol.

Examples of the physical property adjusting agent include metal hydroxides such as KOH, various surfactants, alcohol amines such as diethanolamine and triethanolamine, phosphoric acid, alcohol amine salts of strong acids, ammonium salts, lower carboxylic acids, glycols. Hydroxycarboxylic acids such as acids and lactic acids, fungicides such as sodium benzoate, potassium sorbate, thiabendazole and benzimidazole, chelating agents, deoxidizers, defoamers, antistatic agents, conductivity imparting agents, etc. Additives can be used depending on the application.

In order to further improve the characteristics, a polymer surfactant can be used. For example, as an anionic surfactant, in a synthetic system, a styrene-maleic anhydride copolymer, an olefin-maleic anhydride copolymer, naphthalene. There are formalin condensates of sulfonic acids, polyacrylic acid soda, polyacrylamide partial hydrolysates, and naturally occurring sodium alginate. Examples of cationic surfactants include polyethyleneimine, polyvinylimidazoline, aminoalkyl (meth) acrylate / acrylamide copolymers, polyacrylamide-Mannich modified products in synthetic systems, and chitosan in natural systems. As the nonionic surfactant, polyvinyl alcohol, polyoxyethylene ether ester copolymer, polyacrylamide, and starch can be used in the synthetic system and in the natural system. A resin emulsion is also effective.

There is a method of making the ink insoluble in the recording medium by light, and the composition material is, for example, a monofunctional group of 2
-Ethylhexyl (meth) acrylate (HEA), 2
-Hydroxyethyl (meth) acrylate (HEA),
2-hydroxypropyl (meth) acrylate (HP
A), caprolactone-modified tetrahydrofurfuryl (meth) acrylate, isobornyl (meth) acrylate,
3-methoxybutyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, lauryl (meth)
Acrylate, 2-phenoxyethyl (meth) acrylate, isodecyl (meth) acrylate, isooctyl (meth) acrylate, tridecyl (meth) acrylate, caprolactone (meth) acrylate, ethoxylated nonylphenol (meth) acrylate, bifunctional tripropylene glycol. Di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, neopentyl glycol hydroxypivalate ester di (meth) acrylate (MANDA) and hydroxypivalic acid Neopentyl glycol ester di (meth) acrylate (HPNDA), 1.3-butanediol di (meth)
Acrylate (BGDA), 1.4-butanediol di (meth) acrylate (BUDA), 1.6-hexanediol di (meth) acrylate (HDDA), 1, 9
-Nonanediol di (meth) acrylate, diethylene glycol di (meth) acrylate (DEGDA), neopentyl glycol di (meth) acrylate (NPG
DA), tripropylene glycol di (meth) acrylate (TPGDA), caprolactone modified hydroxypivalic acid neopentyl glycol ester di (meth) acrylate, propoxylated pentyl glycol di (meth) acrylate, ethoxy modified bisphenol A di (meth) acrylate , Polyethylene glycol 200
Di (meth) acrylate, polyethylene glycol 40
0 di (meth) acrylate, polyfunctional trimethylolpropane tri (meth) acrylate (TMPTA), pentaerythritol tri (meth) acrylate (PET)
A), dipentaerythritol hexa (meth) acrylate (DPHA), triallyl isocyanate, ε-caprolactone-modified dipentaerythritol (meth) acrylate, tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate, ethoxylated tri Methylolpropane tri (meth) acrylate, propoxylated trimethylolpropane tri (meth) acrylate, propoxylated glyceryl tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, dipentaerythritol hydroxypenta (Meth) acrylate, ethoxylated pentaerythritol tetra (meth) acrylate, penta (meth) acrylate ester and the like are preferable.

As the prepolymer, polyester resins, acrylic resins, epoxy resins, urethane resins, alkyd resins, ether resins, acrylates such as polyhydric alcohols, and methacrylates can be used without limitation. It can also be used for water-soluble resins and emulsion-type photocurable resins. UV curable ink for inkjet printers has a viscosity as low as 1/10 to 1/1000 as compared with the UV curable ink used in conventional silk screen printing.
Monomers and oligomers with low molecular weight are used. As a result, the vapor pressure becomes low and the structure becomes volatile, and odor becomes a problem. As non-aqueous ink, hexadecane,
There are aliphatic solvents such as heptadecane, octadecane, and nonadecane, isopers (Exxon Corporation), and aromatic solvents.

Specifically, it is desirable that the odor generated by storage or recording can be directly deodorized near the source. Further, it is desirable that it is easy to see, easy to maintain, and detachable, and it should be installed on the inner surface of the printer device front cover. It can be installed without particular limitation, but the deodorizing effect is low in the ink storage place or a place distant from the recording portion. As one of the above deodorizing means, it is possible to know at a glance how long the deodorizing means has been used, how long it has deteriorated, and when to replace it, so that the deodorizing means can be maintained and replaced at an appropriate time so that the deodorizing efficiency can be maintained at all times. It is effective that at least a part of them changes color depending on absorption or decomposition of odorous gas.
Specifically, deodorants and deodorants are adsorbents, iron ascorbic acid and iron complexes, enzyme-based deodorants such as metal phthalocyanine derivatives such as cobalt and manganese, low-temperature oxidation catalysts such as manganese oxides and perovskite-type catalysts. , Photocatalysts such as titanium oxide, silicon carbide, silicon nitride, calcium silicate, alumina / silica, synthetic ceramics such as zirconia, barley stone, far-infrared ceramics such as felsonite, tea extract components, catechins, tannins, flavonoids, A wide variety of commercially available products such as activated carbon, activated carbon fiber, natural and synthetic zeolite, activated clay, sepiolite, magnesium oxide, zinc oxide can be used. If necessary, a plurality of these deodorants may be used in combination, or a hybrid deodorant obtained by combining these deodorants may be used. Examples of the support of the deodorizing filter carrying the deodorant include non-woven fabric, resin film, metal foil and the like. A sheet having poor air permeability may be provided with or improved air permeability by forming a hole having a certain size. As a means of softening volatile odors,
A fragrance may be used or may be used in combination with a deodorant. Examples of aromatic agents include fragrances (citral, cinnamic aldehyde, heliotopin, camphor, bornyl acetate)
Examples include wood vinegar, paradichlorobenzene, surfactants, higher alcohols, terpene compounds (limonene, pinene, camphor, borneol, eucalyptol, eugenol). These may be directly added to the recording liquid or used indirectly, as long as they do not change the characteristics of the recording liquid. Recording may be performed using a recording medium to which deodorizing and aroma functions have been added in advance. A wide variety of commercially available products can be used. If the microcapsules containing the fragrance are made crushable, the microcapsules are ruptured during the heating and drying process, and the released fragrance causes fragrance to soften the volatile odor of the recording liquid. The fragrance generating means may be provided with an opening capable of flattening, and the mechanism may be such that the fragrance is generated by opening the opening of the fragrance storage container only during the process in which the solvent is likely to volatilize. Is also good. This also has a role of adjusting the humidity of the recording medium and is efficient. As means for adjusting the water content of the recording medium, there are a type of spraying a liquid on the recording medium and a type of drying excess water.

Further, in the present invention, in ink jet printing, since it is necessary to stably and highly accurately eject ink droplets from fine nozzles, dust in the air or fiber powder generated from paper or cloth is borne on the print head surface. If adhered, high quality recording cannot be done. Therefore, it is important to have a dust removing mechanism. There is no particular limitation as long as it can remove dust, and general commercially available means can be widely used. For example, an air purification filter that removes dust and odors at the same time is effective, and a combination of a dust removal layer made of glass fiber or synthetic fiber and a deodorization layer made of an adsorbent such as activated carbon in layers is useful. . Contains copper and copper compounds,
The deodorizing electret fiber is effective in capturing particles having a small particle diameter with high efficiency.

The colorant is preferably a pigment which is well dispersed in the above vehicle and has excellent weather resistance. Although not particularly limited, for example, the following organic or inorganic pigments described in the color index can be used in the present invention.

As the red or magenta pigment, Pig
ment Red 3, 5, 19, 22, 31, 38,
43, 48: 1, 48: 2, 48: 3, 48: 4, 4
8: 5, 49: 1, 53: 1, 57: 1, 57: 2, 5
8: 4, 63: 1, 81, 81: 1, 81: 2, 81:
3, 81: 4, 88, 104, 108, 112, 12
2, 123, 144, 146, 149, 166, 16
8, 169, 170, 177, 178, 179, 18
4, 185, 208, 216, 226, 257, Pig
ment Violet 3, 19, 23, 29, 3
0, 37, 50, 88, Pigment Orange
13, 16, 20, 36, as a blue or cyan pigment, Pigment Blue 1, 15, 15: 1,
15: 2, 15: 3, 15: 4, 15: 6, 16, 17
-1, 22, 27, 28, 29, 36, 60, and as the green pigment, Pigment Green 7, 26, 3
6, 50, as a yellow pigment, Pigment Yell
ow 1, 3, 12, 13, 14, 17, 34, 35,
37, 55, 74, 81, 83, 93, 94, 95, 9
7, 108, 109, 110, 137, 138, 13
9,153,154,155,157,166,16
7, 168, 180, 185, 193, and as the black pigment, Pigment Black 7, 28, 26 or the like can be used according to the purpose.

Specific product names are, for example, Chromo Fine Yellow 2080, 5900, 5930, AF.
-1300, 2700L, Chromo Fine Orange 37
00L, 6730, Chromo Fine Scarlet 675
0, Chromo Fine Magenta 6880, 6886, 68
91N, 6790, 6887, Chromo Fine Violet RE, Chromo Fine Red 6820, 683
0, Chromo Fine Blue HS-3, 5187, 510
8, 5197, 5085N, SR-5020, 502
6, 5050, 4920, 4927, 4937, 482
4, 4933GN-EP, 4940, 4973, 520
5, 5208, 5214, 5221, 5000P, Chromo Fine Green 2GN, 2GO, 2G-550D,
5310, 5370, 6830, Chromo Fine Black A-1103, Seika Fast Yellow 10GH, A-
3, 2035, 2054, 2200, 2270, 230
0, 2400 (B), 2500, 2600, ZAY-2
60, 2700 (B), 2770, Seika Fast Red 8040, C405 (F), CA120, LR-11.
6, 1531B, 8060R, 1547, ZAW-26
2, 1537B, GY, 4R-4016, 3820, 3
891, ZA-215, Seika Fast Carmine 6B1
476T-7, 1483LT, 3840, 3870, Seika Fast Bordeaux 10B-430, Seika Light Rose R40, Seika Light Violet B800, 78
05, Seika Fast Maroon 460N, Seica Fast Orange 900, 2900, Seica Light Blue C7
18, A612, cyanine blue 4933M, 4933
GN-EP, 4940, 4973 (all manufactured by Dainichi Seika Kogyo Co., Ltd.), KET Yellow 401, 402, 40
3, 404, 405, 406, 416, 424, KET
Orange 501, KET Red 301, 3
02, 303, 304, 305, 306, 307, 30
8, 309, 310, 336, 337, 338, 34
6, KET Blue 101, 102, 103, 10
4, 105, 106, 111, 118, 124, KET
Green 201 (above made by Dainippon Ink and Chemicals), C
colortex Yellow 301, 314, 31
5, 316, P-624, 314, U10GN, U3G
N, UNN, UA-414, U263, Finecol
Yellow T-13, T-05, Pigment
Yellow 1705, Colortex Oran
ge 202, Colortex Red 101, 10
3, 115, 116, D3B, P-625, 102, H
-1024, 105C, UFN, UCN, UBN, U3
BN, URN, UGN, UG276, U456, U45
7,105C, USN, Colortex Maroo
n601, Colortex Brown B610N,
ColortexViolet600, Pigment
Red 122, Colortex Blue51
6, 517, 518, 519, A818, P-908,
510, Colortex Green 402, 40
3, Colortex Black 702, U905
(Above Sanyo dye), Lionol Yellow14
05G, Lionol Blue FG7330, FG
7350, FG7400G, FG7405G, ES, E
SP-S (above Toyo Ink), Toner Mage
ntaE02, Permanent RubinF6
B, Toner Yellow HG, Permane
nt Yellow GG-02, Hostapeam
BlueB2G (above Hoechst Industries), carbon black # 2600, # 2400, # 2350,
# 2200, # 1000, # 990, # 980, # 97
0, # 960, # 950, # 850, MCF88, # 7
50, # 650, MA600, MA7, MA8, MA1
1, MA100, MA100R, MA77, # 52, #
50, # 47, # 45, # 45L, # 40, # 33, #
32, # 30, # 25, # 20, # 10, # 5, # 4
4, CF9, (manufactured by Mitsubishi Chemical) and the like. It is also possible to use a dispersion liquid in which the pigment is dispersed in water or a solvent in a high concentration in advance. For example, KIJ200-23-2,
KIJ200-23-1 (Made by Ciba Specialty Chemicals) MICROPIGMO WMBK-5, WM
BE-5, WMRD-5, WMYW-5, AMBK-
2, AMYW-2, AMBE-4 (all manufactured by Orient Chemical Co., Ltd.), JA Black25W, GA Black 2
821, GA Yellow 1, GA Agent
a1, GA Cyan 2 (above Mikuni dye) CAB-
O-JET200, CAB-O-JET300 (above Cabot Specialty Chemicals), etc., and those in which the pigment concentration is dispersed at a high concentration of 10% by weight or more are particularly desirable dyes, direct dye, acid dye, edible Various dyes usually used for ink jet recording such as dyes, basic dyes, reactive dyes, disperse dyes, vat dyes, soluble vat dyes, and reactive disperse dyes can be used.

A suitable pigment concentration is 2 to 10% by weight. If it is less than 2 weight percent, the image quality is deteriorated, and if it is more than 10 weight parts, the ink viscosity characteristics are adversely affected. In addition, two or more kinds of colorants can be appropriately mixed and used for color adjustment or the like. Water-insoluble components other than the colorant include vinyl ester-based, acrylic ester-based, methacrylic acid ester-based, styrene-based, olefin-based and monomers having a hydrophilic functional group such as an amide group, a carboxyl group, an amino group and a hydroxyl group. A homopolymer or copolymer resin emulsion, a microemulsion, a colloidal dispersion, or a natural or synthetic wax emulsion such as paraffin wax, microcrystalline wax, polyethylene wax, or carnauba wax can be used. All of them are added for the purpose of improving the adhesion to paper and the abrasion resistance, but in an ink jet printer, a resin having a large molecular weight cannot be added due to the limitation of viscosity. Therefore, when a low molecular weight resin is emulsified and used, an unpleasant odor may be felt. Moreover,
It is also possible to disperse a metal in which fine particles of an inorganic substance such as gold, silver, copper or silica are dispersed. In order to further exhibit functionality in the ink composition of the present invention, a light stabilizer, a surface treatment agent, a surfactant, a viscosity reducing agent, an antioxidant, an antioxidant, a crosslinking accelerator, an oxygen absorber, a plasticizer. An antiseptic agent, a rust preventive agent, an evaporation accelerator, a pH adjusting agent, a chelating agent, a defoaming agent, a moisturizing agent, a dispersant, a specific resistance adjusting agent, a surface tension adjusting agent and the like can be mixed.

A stirrer, a bead mill and a homogenizer are most suitable for mixing and dispersing the above-mentioned vehicle, pigment and other components, but various known stirring, pulverizing or dispersing devices can be used without particular limitation. The recording medium is not limited to paper, and can be applied to metals, plastics, and all other possible media having similar characteristics. Further, in the color ink jet recording system, it is important that the ink composition itself of each color has a good color reproduction range.

The printing speed of the printer in the field of the present invention is characterized by being significantly higher than that of the conventional ink jet recording. Although there is no clear limitation on the speed, in order to effectively use the ink composition of the present invention, the relative speed between the nozzle and the paper is 10 ips (inch / inch / inch).
A recording speed of s) or higher is particularly preferable. In order to record at high speed, it is necessary to fix (set) the ink droplets immediately after they adhere to the recording medium, and if insufficient, transfer them to the back surface of other paper on which the adhered ink reservoirs are stacked. To do
A fatal problem such as adhesion to a feed roll in a recording device or disturbance of recording dots will occur. Recording speed 10i
In order to realize ps, for example, it is necessary that the recording be fixed within about 1 second after recording. That is, according to the present invention, the record can be practically handled (touched by the hand, etc.) within about 1 second. The recording head or recording method for on-demand ink jet recording using a piezoelectric element is
Line type recording, serial type recording, transfer type (shuttle type)
Although there are various formats such as recording, the present invention can be used without particular limitation. In either case, the relative moving speed between the nozzle and the paper (recording medium) is 10i.
When the head portion is fixed and only the paper is moved as in the line type recording, the paper moving speed (paper feed speed) corresponds to the relative speed, and serial type recording, that is, the head is the paper When moving vertically to the feeding direction, sequentially recording, and intermittently feeding the paper, the head moving speed (carriage speed) corresponds to the relative speed.
The paper is installed on a rotating drum etc. and records on it.
Alternatively, in the case of a transfer type in which recording is performed once on a drum and then transferred onto a sheet, it is understood as the speed at which the relative position between the moving sheet or the drum surface and the nozzle changes. In either case, the printing speed is directly related to the nozzle ejection frequency and the printing resolution. For example, line type recording paper feed speed or serial type head movement speed (that is, recording speed)
V is determined by the ink droplet ejection frequency f and the recording resolution R.
It is shown by V = f × R. Conventional 5 ips or less (usually 1
In the recording of (ips or less), many conventionally reported ink compositions can be applied as they are. The present invention can be effectively used in high speed recording of at least 5 ips or more, particularly preferably 10 ips or more. It is possible to realize sufficiently practical printing characteristics without using a drying and heating step, but it is also possible to add heating and drying steps in order to more effectively carry out the high speed of the present invention. . It may be one that contacts the recording medium to heat the ink or the recording medium, or one that irradiates infrared rays or blows hot air to overheat without contacting the recording medium. The temperature suitable for drying is preferably 180 ° C. or lower so that the recording medium does not emit smoke or discolor. There is a method of performing recording on the other surface, a method of enabling double-sided printing with a single head by providing an ink transfer body, and the latter is more desirable for speeding up and cost reduction.

The purpose of the present invention is not limited to the paper, but it is more effective in the case of 80-200 μm non-coated paper which belongs to a part of non-coated paper, special printing paper and information paper. For classification of paper, the classification method used in the production statistics of the Ministry of International Trade and Industry is often used. According to this, it is roughly classified into printed information paper, wrapping paper, sanitary paper, and miscellaneous paper, and printed information paper is classified into non-coated paper, lightly coated paper, coated paper, special printing paper, and information paper. is there.
The composition of paper is wide-ranging, and there are various kinds of pulp materials, kinds and amounts of paints, and manufacturing methods, and there are many methods for evaluating and classifying paper. For example, density of paper, thickness, difference between front and back, grain length / width grain (passage direction), porosity of pores, air permeability, water absorption /
It has oil absorbency, sizing degree, surface roughness, glossiness, pH, surface strength, peeling strength, rigidity, folding strength, electrostatic property, etc., and each affects print quality. The present inventor has focused on the thickness of the paper as a method for generally defining the paper in the field intended by the present invention. As the paper of the present invention, for example, grade printing paper,
There are special printing paper such as intermediate printing paper, lower printing paper, thin printing paper, slightly coated printing paper, color fine paper, foam paper, PPC paper and other information paper. Specifically, the following paper and these There are various modified / processed papers used, but the present invention is not limited thereto. Fine paper and color Fine paper, recycled paper, copy paper / color paper, OCR paper, carbonless paper / color paper, YUPO 60, 80, 110
Micron, YUPO Coat 70, 90 micron synthetic paper,
Other single-sided art paper 68 kg, coated paper 90 kg, foam matte paper 70, 90, 110 kg, foamed PET 38
Micron, Mitsuori-kun (above, Kobayashi recording paper), OK fine paper, New OK fine paper, Sunflower, Phoenix, OK Royal White, Export fine paper (NPP, NC)
P, NWP, Royal White) OK book paper, OK cream book paper, cream fine paper, OK map paper, OK
Ishikari, cucumber, OK foam, OKH, NIP
-N (above, Shin Oji Paper Co., Ltd.), Kino, Toko, export fine paper,
Special-quality high-quality paper, book paper, book paper L, light cream book paper, small science textbook paper, continuous slip paper, high-quality NIP paper,
Silver ring, gold yang, gold yang (W), bridge, capital, silver ring book, harp, harp cream, SK color, securities paper, opera cream, opera, KYP chart, Silvia HN, excellent foam (above, Nippon Paper Industries) , Pearl, Kinryo, Uscream fine paper, specially made book paper, super book paper, book paper, diamond foam (above, Mitsubishi Paper Mills), gold carpet V, gold carpet SW, white elephant, high-grade publication paper, cream gold carpet, Cream white elephant, securities / cash voucher paper, book paper, map paper, copy paper, HNF (above, Hokuetsu Paper Manufacturing) siora, phone book cover, book paper, cream shirai, cream shirai mid rough, cream shii Big rough, DSK
(Above, Daishowa Paper), Sendai MP fine paper, Nishikie, Raicho fine, hanging paper, colored paper base paper, dictionary paper, cream book, white book, cream fine paper, map paper, continuous slip paper (above, Chuetsu pulp), OP Golden Cherry Blossom, Gold Sand, Reference Paper, Exchange Certificate Paper (White), Form Printing Paper, KR
F, White foam, Color foam, (K) NIP, Fine PPC (made by Kishu Paper Co., Ltd.), Taiou, Bright foam, Kant, Kant white, Dante, CM paper,
Dante comics, Heine, paperback paper, Heine S, New AD paper, Utrilo Excel, Excel Super A,
Kant Excel, Excel Super B, Dante Excel, Heine Excel, Excel Super C, Excel Super D, AD Excel, Excel Super E, New Bright Foam, New Bright NIP (made by Daio Paper Co., Ltd.), Nichirin, Moon Ring, Unmine, Galaxy, Baiyun, Weiss, Moon Ring Ace, Baiyun Ace, Kumoyu Ace (made by Nippon Paper Industries),
Taiou, bright foam, bright nip (above Nagoya pulp), peony A, gold pigeon, special peony, white peony A, white peony C, silver pigeon, super white peony A, light cream white peony, extra medium quality paper, white Pigeon, super medium quality paper, blue pigeon, red pigeon, Kin pigeon M Snow Vision, Snow Vision, Kin Pigeon Snow Vision,
White pigeon M, Super DX, Hamanasu O, Red pigeon M, HK Super printing paper (made by Honshu Paper Co., Ltd.), Star Linden (A.
AW), Star Elm, Star Maple, Star Laurel, Star Poplar, MOP, Star Cherry I, Cherry I Super, Cherry II Super, Star Cherry III, Star Cherry IV, Cherry III Super, Cherry IV Super (above Marusumi Paper ), SHF
(Made by Toyo Pulp), TRP (Made by Tokai Pulp).
As the recording medium, for example, high-quality paper and color high-quality paper, X
Examples include erox 4024, inkjet plain paper and special paper, recycled paper and slip paper. Paper having a film thickness of 80 to 200 μm, which is widely used as normal plain paper, can be inexpensively used.

The recording medium is not limited to paper, and can be applied to metals, plastics, and all other possible mediums having similar characteristics. The pH of the paper is not limited, and it can be widely used from strongly acidic paper having a pH of about 2 to neutral paper having a pH of 6.5 or more. Paper without a coating layer is preferable because it is easy to perform double-sided printing and the printing cost is low.

The fabric is not particularly limited, but recording can be performed on cellulosic fibers such as cotton, hemp, rayon and cupra, synthetic fibers such as polyester, acetate, polypropylene and polyamide, and blends thereof.

The preparation of high quality inkjet inks requires a balance of many important factors. Although these requirements are complex and cannot always be clearly quantified for the inks of the present invention, the inks of the present invention satisfy some well-known requirements for application in inkjet printers. That is, this ink has sufficient stability at room temperature and has reliable storage before printing and image quality after printing. After adhering to the recording medium and curing, it forms a uniform thin film having sufficient transparency and saturation, and gives a printed matter of good image quality. It is necessary that the composition is such that offset does not occur in the state where printed materials are piled up and that the composition is highly safe considering the environment and human body.

Next, the present invention will be specifically described with reference to examples, but the present invention is not limited to the examples.

[0026]

[Table 1]

Examples 1 to 4 42 parts by weight of purified water, 50 parts by weight of glycerin, 5 parts by weight of diethylene glycol monobutyl ether, and 3 parts by weight of N, N-dimethylethanolamine (all manufactured by Wako Pure Chemical Industries, Ltd.) On the other hand, as a pigment, a black pigment dispersion (manufactured by Taisei Kako, TBK-BC
3), magenta pigment water dispersion (GA Mag manufactured by Mikuni dye)
enta1), yellow pigment water dispersion (KIJ200-23-2 manufactured by Ciba Specialty Chemicals) cyan pigment water dispersion (KIJ200 manufactured by Ciba Specialty Chemicals)
-23-2) was mixed so that the pigment concentration was 4% by weight with respect to the total amount, and a total of 300 g of each composition was homogenized at a rotation speed of 2,000 rpm using a homogenizer (HG30 manufactured by Hitachi Koki). And was dispersed until 4 types were obtained to obtain 4 kinds of homogeneous ink compositions. The thickness of the paper was measured with a micrometer. For evaluation, 55 kg paper (Kobayashi recording paper, NIP paper, thickness: 87.8 μm) and polyester fiber were used as recording media, and a direct plate making machine (Hitachi Koki SJ02A) was used to first eject ink onto the paper surface. With a speed of 3 kHz and a paper feed speed of 10 ips,
Printing was performed at a resolution of 300 (× 600) dpi. As the printer device, the means shown in Table 1 was provided. here,
Eleven subjects were evaluated by a two-step majority rule, that is, comfortable (does not worry about the smell of ink) and uncomfortable (worries about the smell of ink) before and after recording and during the recording process. In addition, the printing result was evaluated by visually observing the number of times the nozzle surface was cleaned up to the ejection of all the nozzles and the feathering in which the ink dots were disturbed along the fibers of the paper. In Table 1, ⊚ means excellent (cleaning frequency 0 times), ◯ means good (cleaning frequency 2 times or less), and × means unusable (cleaning frequency 3 times or more). The evaluation results of Examples 1 to 5 were all excellent to good, and it was found that a comfortable printing environment can be provided. [Comparative Examples 1 and 2] The same ink composition as in Example 1 was used and evaluated in the same manner. As the printer device, the means shown in Table 1 was provided. The evaluation results showed that a comfortable printing environment and sufficient printing quality could not be achieved at the same time.

[0028]

EFFECT OF THE INVENTION The ink jet printer according to the present invention has a jetting characteristic that does not disturb the user from the smell of the solvent and does not disturb the image due to the difference in the moisture content of the recording medium, the dust in the air or the paper. As a result, it has become possible to manufacture an inexpensive inkjet printer device which is versatile and can be used in any environment.

Claims (9)

[Claims] 1. An ink jet printer for forming an image using a recording liquid in which a colorant or a water-insoluble component having a size of 1.0 micron or less is dissolved or dispersed in a solvent, and the solvent or a part thereof is volatilized. An inkjet printer device comprising means for deodorizing or softening odors. 2. The ink jet printer device according to claim 1, further comprising means for removing or reducing dust in the recording medium and air. 3. The ink jet printer device according to claim 1, further comprising means for adjusting the water content of the recording medium. 4. An ink jet printer for forming an image using a recording liquid in which a colorant or a water-insoluble component having a particle size of 1.0 micron or less is dissolved and / or dispersed in a recording medium or dust in the air. An ink jet printer device, characterized in that it has both means for removing or reducing water content and means for adjusting the water content of the recording medium. 5. The ink jet printer device according to claim 1, 2 or 3, wherein a recording speed is 10 ips or more. 6. The ink jet printer device according to claim 1, 2, 3 or 4, wherein the solvent contains water. 7. The ink jet printer device according to claim 1, 2 or 3, wherein the recording medium is a paper having a thickness of 80 to 200 μm. 8. The ink jet printer device according to claim 1, 2 or 3, wherein the recording medium is a fabric such as synthetic fiber or natural fiber. 9. The ink jet printer device according to claim 1, wherein the ink set contains at least one colorant selected from black, yellow, magenta and cyan.