WO2002057377A1 - Encre pour impression par jet d'encre et procede de fixation de l'encre - Google Patents

Encre pour impression par jet d'encre et procede de fixation de l'encre Download PDF

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Publication number
WO2002057377A1
WO2002057377A1 PCT/JP2001/000370 JP0100370W WO02057377A1 WO 2002057377 A1 WO2002057377 A1 WO 2002057377A1 JP 0100370 W JP0100370 W JP 0100370W WO 02057377 A1 WO02057377 A1 WO 02057377A1
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WO
WIPO (PCT)
Prior art keywords
ink
jet printing
dye
color
paper
Prior art date
Application number
PCT/JP2001/000370
Other languages
English (en)
Japanese (ja)
Inventor
Taisaburo Sakai
Original Assignee
Taisaburo Sakai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taisaburo Sakai filed Critical Taisaburo Sakai
Priority to PCT/JP2001/000370 priority Critical patent/WO2002057377A1/fr
Publication of WO2002057377A1 publication Critical patent/WO2002057377A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/009—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using thermal means, e.g. infrared radiation, heat

Definitions

  • the present invention relates to an ink used for an ink jet printing method and a method for fixing the ink. More specifically, the present invention relates to an ink for ink jet printing for fixing ink by insolubilizing a soluble vat dye dissolved in an ink solvent by irradiating a laser to ink dots on ink-jet printed paper and a fixing method thereof.
  • the ink jet printing method discharges minute droplets of ink from nozzles and adheres them to the surface of a printing material such as paper to print a character or an image.
  • Various ink jet printing methods have been proposed, for example, a method called the continuous method is disclosed in US Pat. Nos. 3,298,030 and 3,596,275.
  • US Pat. No. 3,946,398 discloses a method in which deformation of a piezo element is applied to a driving force of ink ejection.
  • an ink jet printing method in which ink droplets are ejected by utilizing thermal energy is disclosed in US Pat. No. 4,251,824.
  • the ink is ejected from the fine nozzle orifice as fine droplets at a high frequency of more than kilohertz and at a high speed, and the ink droplet ejection stability is determined by the viscosity of the ink and the surface tension. Greatly affected by Therefore, it is desirable that the viscosity of the ink be as small as possible, and that the surface tension of the ink be as large as possible.
  • water is generally used as an ink jet printing ink.
  • An aqueous ink as a main solvent is used.
  • a water-soluble dye is added to the ink as a coloring material.
  • the colorant has low water resistance.
  • the light resistance was weak, and the preservability of the printed matter was insufficient.
  • Ink-jet printing is a new printing technology that has only been in practice for a few years.
  • the ink jet printing method is used as a printer that outputs the image on the display screen of a personal computer to a hard copy because it is compatible with digital signals.
  • the display screen of a personal computer can express a beautiful color image, and it is clear that ink that cannot reproduce this sharp color on paper has a fatal drawback. Due to this drawback, the aqueous ink in which the pigment is dispersed is not evaluated as an ink for inkjet, even if the color material has excellent fastness.
  • Ink jet inks need to maintain the ink viscosity as low as possible, and do not add high-viscosity vehicles to the ink, unlike plate printing inks.
  • pigments are used as colorants in plate printing inks.
  • an ink conditioner When preparing plate printing inks, pigment particles are kneaded with a vehicle for a long time in a kneader called an ink conditioner, and facial particles are removed. Due to miniaturization, irregular reflection of light is suppressed. The fact that the individual facial particles are covered by the vehicle also helps maintain color clarity due to the refractive index.
  • the pigment particles are further finely crushed and the particle size is made smaller than the wavelength of visible light, clear and transparent colors can be obtained, and this problem seems to be easily solved, but it does not actually happen .
  • the fine particles of the ordinary pigment having a particle diameter of 1 to 10 / im are made finer, the surface area of the particles is remarkably increased, and the attractive force between the particles becomes relatively large, so-called secondary aggregation occurs.
  • Secondary agglomeration is a phenomenon in which fine particles stick together and solidify in a dumpling shape. To prevent this, there are measures such as adding a large amount of a surfactant, but it is not preferable to lower the surface tension of the ink for ink jet.
  • aqueous inks containing pigments are not evaluated as ink jet inks even though they have excellent fastness properties.
  • the soluble vat dye is obtained by reducing the insoluble vat dye to a leuco form and stabilizing the leuco form by esterifying the OH group of the leuco form with concentrated sulfuric acid. Since sulfuric acid is a dibasic acid, the remaining acid group is modified to a water-soluble sodium salt. Since the esterification reaction is a reversible reaction, the ester compound is hydrolyzed to regenerate the original compound. As described in Patent Gazette 1995-No. 294777 and Published Patent Gazette No. 10-550 / 570, this soluble vat dye does not have mature energy or light energy. , The original insoluble dye can be regenerated.
  • the pigment regenerated from the water-soluble dye in the ink is very fine particles, so that the same clear color and transparent color as the dye can be obtained.
  • the UV irradiation time required for insolubilizing the dye was as long as 60 seconds, the disadvantage that the ink dots on the paper spread during that time has not been solved.
  • ink jet printing the ink dots begin to bleed immediately after they land on the paper. is there. Prevention of ink bleeding is a very important issue in ink jet printing, since high-quality images cannot be printed if ink bleeds occur.
  • the volume of the ejected ink droplets is 5 to 10 picoliters, and the amount of energy required to insolubilize the ink's soluble vat dye is It is slight. However, it was found that high energy density was required, and it was not possible to concentrate high-density energy on a minute local area by UV irradiation with a UV lamp. Disclosure of the invention
  • laser irradiation is extremely effective as a means for locally applying high-density energy to ink dots adhering to the paper surface.
  • Laser light is a type of coherent electromagnetic wave of a single wavelength and has good convergence, so it can be focused with a lens to reduce the diameter; With a laser, it is easy to concentrate the energy density by 10,000 times. Therefore, focusing on the ink dots that land on the paper surface, laser irradiation for 1 / 10,000 to 1/10 seconds can almost instantaneously insolubilize soluble vat dyes. Was. This makes it possible to perform ink jet printing on bleeding paper such as rough paper without causing bleeding of ink.
  • c soluble vat dye choosing laser wavelength substance absorbs is leuco (Leuco) body vat dyes, one is the number of conjugated double bonds in a molecule small, its Molecular absorption shifts to shorter wavelengths. For this reason, vat dyes have absorption in the visible part (400-800 nm), whereas soluble vat dyes have absorption in the ultraviolet. This is convenient for laser applications, and high energy UV lasers can be used. Ultraviolet light has a large energy, and in addition to the thermal effect of the laser, it is thought that it also has the effect of photochemically exciting dye molecules to promote the hydrolysis of soluble vat dyes. It is thought that vat dyes are instantly insolubilized.
  • composition of the aqueous ink that can be fixed by the laser irradiation of the present invention is as follows:
  • the high-boiling-point polar organic solvent suppresses the evaporation of the ink solvent at the nozzle opening to prevent nozzle clogging.
  • N-methyl-pyrrolidone or ,, ⁇ '-dimethyl-imidazolidinone can be used as the high boiling point polar organic solvent.
  • the laser oscillator a solid-state laser is preferable, and a semiconductor laser is particularly suitable.
  • FIG. 1 is an explanatory view showing that ink droplets are ejected from nozzles of an ink jet printing head and then laser irradiation is performed on ink dots on the paper surface to fix the ink.
  • FIG. 1 shows a state in which a laser is applied to the ink dots on the paper surface, and the ink droplets and the ink dots are enlarged for ease of illustration.
  • the laser element a semiconductor laser element made of gallium nitride having an output wavelength of 403 nm (output: 50 to 20 OmW) is used.
  • Dyes suitable for Cyan (C), agenta (M), Yellow (Y), Black (K) are selected from the dyes listed above to make inks of each color.
  • CMYK 4-color inks and print color images with different color tones from the display screen.
  • soluble dye dyes for use in CMYRGBK 7 color inks are selected from the above dye list and indicated by I. structure number:
  • Green (G) ink C.1.59825 or C.1.59830
  • Blue (B) ink C.1.73000, C.1.73055, C.1.69800, C.1.73065 or C.1.69825
  • the ink jet printing method is compatible with digital signals, it is used for printers that output information of a short time on a paper.
  • the ink jet printing method combined with a computer can be used to reduce printing costs, and is considered to be the next-generation printing method.
  • the ink jet printing method has a simple structure of the ink discharge head and is easy to integrate nozzles on a large scale. Therefore, it is suitable for multicolor printing, and can be used for high-speed printing.
  • ink jet printing In order for ink jet printing to replace plate printing, ink durability (robustness) must be improved to the same level as plate printing inks.
  • water-soluble dyes base dyes, acid dyes, etc.
  • base dyes, acid dyes, etc. are used in inkjet printing inks, and the lightfastness of printed matter is poor and the water resistance is poor.
  • the inkjet printing method was limited to use as a personal printer.
  • the ink for ink jet printing and the ink fixing method of the present invention a printed matter having the same durability as that of conventional plate printing can be obtained on plain paper, and commercial printing by the ink jet printing method becomes possible.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)

Abstract

L'invention concerne une encre à base d'eau destinée à l'impression par jet d'encre, contenant un colorant de cuve soluble; et un procédé de fixation de l'encre, consistant à imprimer un papier avec l'encre à base d'eau par impression par jet d'encre, puis à appliquer un rayonnement aux points d'encre sur le papier avec une lumière laser, de manière à insolubiliser le colorant et à fixer l'encre. Ce procédé permet d'obtenir une impression par jet d'encre qui est exempte d'allongement des points d'encre, et qui présente une couleur lumineuse, et dont la durabilité (résistance à l'eau et résistance à la lumière) aux imprimés classiques.
PCT/JP2001/000370 2001-01-19 2001-01-19 Encre pour impression par jet d'encre et procede de fixation de l'encre WO2002057377A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/000370 WO2002057377A1 (fr) 2001-01-19 2001-01-19 Encre pour impression par jet d'encre et procede de fixation de l'encre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/000370 WO2002057377A1 (fr) 2001-01-19 2001-01-19 Encre pour impression par jet d'encre et procede de fixation de l'encre

Publications (1)

Publication Number Publication Date
WO2002057377A1 true WO2002057377A1 (fr) 2002-07-25

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PCT/JP2001/000370 WO2002057377A1 (fr) 2001-01-19 2001-01-19 Encre pour impression par jet d'encre et procede de fixation de l'encre

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7153350B2 (en) 2003-12-10 2006-12-26 Pitney Bowes Inc. Water soluble colorants for ink jet printing
US20130306914A1 (en) * 2011-01-28 2013-11-21 Merck Patent Gmbh Flavanthrene derivatives and their use as organic semiconductors
CN107268305A (zh) * 2017-07-26 2017-10-20 青岛英杰泰新材料有限公司 一种基于还原染料的喷墨打印着色剂及其制备方法
JP2019524974A (ja) * 2016-06-22 2019-09-05 ブイエフ ジーンズウェア リミティド パートナーシップ 修飾インジゴ化合物及び修飾インジゴ化合物を使用して基材を染色する方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274216A1 (fr) * 1986-12-02 1988-07-13 Canon Kabushiki Kaisha Encre et procédé d'enregistrement par jet d'encre utilisant cette encre
WO2000015724A1 (fr) * 1998-09-16 2000-03-23 Taisaburo Sakai Procede d'enregistrement par jet d'encre

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274216A1 (fr) * 1986-12-02 1988-07-13 Canon Kabushiki Kaisha Encre et procédé d'enregistrement par jet d'encre utilisant cette encre
WO2000015724A1 (fr) * 1998-09-16 2000-03-23 Taisaburo Sakai Procede d'enregistrement par jet d'encre

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7153350B2 (en) 2003-12-10 2006-12-26 Pitney Bowes Inc. Water soluble colorants for ink jet printing
US20130306914A1 (en) * 2011-01-28 2013-11-21 Merck Patent Gmbh Flavanthrene derivatives and their use as organic semiconductors
US9373801B2 (en) * 2011-01-28 2016-06-21 Merck Patent Gmbh Flavanthrene derivatives and their use as organic semiconductors
JP2019524974A (ja) * 2016-06-22 2019-09-05 ブイエフ ジーンズウェア リミティド パートナーシップ 修飾インジゴ化合物及び修飾インジゴ化合物を使用して基材を染色する方法
US11208559B2 (en) 2016-06-22 2021-12-28 The H.D. Lee Company, Inc. Modified indigo compounds and methods of dyeing a substrate using a modified indigo compound
JP7084387B2 (ja) 2016-06-22 2022-06-14 ブイエフ ジーンズウェア リミティド パートナーシップ 修飾インジゴ化合物及び修飾インジゴ化合物を使用して基材を染色する方法
CN107268305A (zh) * 2017-07-26 2017-10-20 青岛英杰泰新材料有限公司 一种基于还原染料的喷墨打印着色剂及其制备方法
CN107268305B (zh) * 2017-07-26 2020-06-02 青岛英杰泰新材料有限公司 一种基于还原染料的喷墨打印着色剂及其制备方法

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