WO2013088907A1 - Encre d'impression à jet d'encre, cartouche d'encre, procédé de fabrication d'encre d'impression à jet d'encre, procédé de fabrication de cartouche d'encre, et procédé d'impression - Google Patents

Encre d'impression à jet d'encre, cartouche d'encre, procédé de fabrication d'encre d'impression à jet d'encre, procédé de fabrication de cartouche d'encre, et procédé d'impression Download PDF

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WO2013088907A1
WO2013088907A1 PCT/JP2012/079903 JP2012079903W WO2013088907A1 WO 2013088907 A1 WO2013088907 A1 WO 2013088907A1 JP 2012079903 W JP2012079903 W JP 2012079903W WO 2013088907 A1 WO2013088907 A1 WO 2013088907A1
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WIPO (PCT)
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ink
resin
molecular weight
recording
inkjet recording
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PCT/JP2012/079903
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English (en)
Japanese (ja)
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山本　寛峰
敬之 細井
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株式会社セイコーアイ・インフォテック
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Publication of WO2013088907A1 publication Critical patent/WO2013088907A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/50—Sympathetic, colour changing or similar inks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17513—Inner structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17553—Outer structure
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks
    • C09D11/32—Inkjet printing inks characterised by colouring agents
    • C09D11/322—Pigment inks
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks
    • C09D11/36—Inkjet printing inks based on non-aqueous solvents

Definitions

  • the present invention relates to an ink for ink jet recording, a method for manufacturing ink for ink jet recording, an ink cartridge, and a method for manufacturing an ink cartridge.
  • the present invention relates to a fluorescent ink jet recording ink containing an organic fluorescent pigment using an organic solvent as a main solvent, a method for producing the same, and a recording method using the ink.
  • Inkjet recording apparatuses are popular because they can print from a small number of copies, can be printed at low cost, and are easy to perform color printing.
  • the ink used in the ink jet recording apparatus includes a water-based ink using water as a main solvent, an organic solvent-based ink using an organic solvent as a main solvent, a dye ink using a dye as a color material, and a pigment as a color material.
  • Various things, such as the pigment ink used are known.
  • fluorescent fluorescent inks are also known.
  • Fluorescent ink has higher visibility than non-fluorescent ink. This is because the fluorescent dye radiates a part of the absorbed light energy together with the reflected light of the incident light source while changing the wavelength. High visibility makes it easy for humans to recognize and is widely used for advertising purposes and for warning signs.
  • the ink jet recording apparatus is required to increase the printing speed and to quickly dry the printed matter.
  • the ink for inkjet recording needs to be excellent in drying property.
  • the safety of ink for inkjet recording, storage stability, stable ejection performance from the recording head, and the like are also required.
  • an organic solvent ink containing an inorganic pigment as a coloring material and an organic solvent as a main component as a solvent is used.
  • Ink for ink jet recording using an organic solvent can be recorded on various recording media.
  • PVC base material polyvinyl chloride base material
  • synthetic paper, an acrylic board, a polyethylene terephthalate, a polycarbonate, a PVC base material is mentioned.
  • Patent Document 1 an ink using an inorganic fluorescent pigment is disclosed in Patent Document 1.
  • This technique discloses an ink-jet recording ink technique in which an inorganic fluorescent pigment is used as a fluorescent dye and an amine group-containing alcohol is added to prevent nozzle clogging of the recording head.
  • the ink for ink jet recording of Patent Document 1 uses an inorganic pigment that easily settles on a fluorescent pigment.
  • the precipitation of the inorganic fluorescent pigment can be prevented by adding an amine group-containing alcohol, the storage stability at a low temperature at which the precipitation of the pigment is more remarkable has not been evaluated.
  • the Brownian motion of the inorganic fluorescent pigment is weakened, and it is considered that the particles tend to settle due to the bonding and aggregation of the particles. Therefore, there is a possibility that the inorganic fluorescent pigment in the ink settles at a low temperature. Therefore, it can be considered that the storage stability of the ink is poor at low temperatures. Therefore, there is a problem that stable ink ejection performance cannot be obtained.
  • an object of the present invention is to solve the above-described problems, and is excellent in drying property, safety, storage stability, water resistance, adhesion to a recording medium, and stable from a recording head.
  • inks for fluorescent ink jet recording ink cartridges, and methods for producing them.
  • the inkjet recording ink of the present invention is an inkjet recording ink in which the organic solvent including an organic fluorescent pigment, a pigment dispersant, an organic solvent, and a binder resin is a main solvent, and the organic fluorescent pigment includes A synthetic resin dyed with a dye, wherein the binder resin includes a high molecular weight resin and a low molecular weight resin, and a ratio of the high molecular weight resin and the low molecular weight resin in the inkjet recording ink is 1.0 ⁇ ( % By weight of the high molecular weight resin) / (% by weight of the low molecular weight resin)) ⁇ 5.0, and the content of the binder resin in the ink for ink jet recording is 1% by weight.
  • the organic solvent including an organic fluorescent pigment, a pigment dispersant, an organic solvent, and a binder resin is a main solvent
  • the organic fluorescent pigment includes A synthetic resin dyed with a dye
  • the binder resin includes a high molecular weight resin and a low mo
  • the high molecular weight resin is a vinyl chloride vinyl acetate copolymer resin having an average molecular weight of 20000 or more and 30000 or less, and the low molecular weight resin is an average molecular weight.
  • the amount is different from resin 1000 to 10,000 in the molecular weight resin, wherein the organic fluorescent content of the ink-jet recording ink of the pigment is 30 wt% or less 8% by weight or more.
  • An ink cartridge according to the present invention includes the above-described inkjet recording ink, a pouch for storing the inkjet recording ink, and a case for storing the pouch.
  • the method for producing an inkjet recording ink of the present invention is a method for producing an inkjet recording ink in which the organic solvent containing an organic fluorescent pigment, a pigment dispersant, an organic solvent, and a binder resin is a main solvent.
  • the organic fluorescent pigment is a synthetic resin dyed with a dye
  • the binder resin is a vinyl chloride vinyl acetate copolymer resin having an average molecular weight of 20000 or more and 30000 or less and an average molecular weight of 1000 or more and 10,000 or less.
  • a low molecular weight resin that is a resin different from the high molecular weight resin, dissolving the organic fluorescent pigment and the pigment dispersant in the organic solvent to obtain a pigment dispersion, and the high molecular weight resin and the low molecular weight resin.
  • the ratio of the resin in the ink for inkjet recording is 1.0 ⁇ (% by weight of the high molecular weight resin) / (% by weight of the low molecular weight resin) ) ⁇ 5.0 and the content in the inkjet recording ink is 1 wt% or more and 20 wt% or less, and the organic fluorescent pigment is contained in the inkjet recording ink And a step of mixing the pigment dispersion, the binder resin, and the organic solvent so that the amount is 8 wt% or more and 30 wt% or less.
  • the ink cartridge manufacturing method of the present invention includes a step of storing the above-described ink for ink jet recording in a pouch and a step of storing the pouch in a case.
  • the recording method of the present invention is a recording method of an ink jet recording apparatus that ejects ink for ink jet recording while causing a recording head having a plurality of nozzles to scan in the main scanning direction of the recording substrate.
  • a recording ink a step of ejecting the ink jet recording ink onto a recording base material by a first scan, a step of transporting the recording base material in a sub-scanning direction, and a second after the first scanning.
  • a fluorescent inkjet recording ink that is excellent in dryness, safety, storage stability, water resistance, and adhesion to a recording medium and can be stably ejected from a recording head.
  • FIG. 1 is an exploded perspective view of an ink cartridge according to a preferred embodiment of the present invention.
  • the ink for ink jet recording needs to contain an organic fluorescent pigment, a pigment dispersant, a binder resin, and an organic solvent.
  • Organic fluorescent pigments are manufactured by dyeing one or more synthetic resins of polyamide resin, formaldehyde polycondensate, ketone resin, and vinyl copolymer, and an oily dye or basic dye as a colorant. It has been done.
  • organic fluorescent pigments are FM-11, FM-12, FM-13, FM-14, FM-15, FM-16, FM-17, FM-27, FM-34N, FM-35N, manufactured by Sinloihi There are FM-47, FM-103, FM-105, FM-107, and FM-109.
  • organic solvents that can dissolve such organic fluorescent pigments.
  • the organic fluorescent pigment By dissolving the organic fluorescent pigment in the organic solvent, it is not necessary to control the pigment particle diameter, the adjustment can be easily performed, and the synthetic resin constituting the organic fluorescent pigment has a binder function. Becomes a small amount.
  • the organic fluorescent pigment dissolves in the ink for ink jet recording, so there is no risk of sedimentation due to aggregation of the pigment, so the storage stability of the ink for ink jet recording is improved and the stable ejection performance from the recording head is maintained. There is an advantage that it becomes possible to do.
  • the content of the organic fluorescent pigment in the ink is 8% by weight or more and 30% by weight or less, preferably 8% by weight or more and 20% by weight or less. In general, when a pigment is used, the content of the pigment in the ink is about 5 to 10% by weight. When an organic fluorescent pigment is used, the amount is larger than that. For this reason, the fluorescence ink has a higher viscosity than the color ink due to the difference in pigment content, and the amount of binder resin added is limited, making it difficult to obtain sufficient adhesion to the recording substrate. There is a problem of becoming. However, such a problem can be solved by using a vinyl chloride resin and an acrylic resin as a binder resin.
  • pigment dispersant phthalocyanine ammonium salt type, polyester amine type, fatty acid amine type, apolyalkylene imine type, polyester polyamide type, basic dispersant and the like can be used.
  • an apolyalkyleneimine-based or basic dispersant in which the amine value of the pigment dispersant is in the range of 10 mgKOH / g to 50 mgKOH / g is preferable.
  • the organic fluorescent pigment is suitably dissolved. The reason is not clear, but it is considered that the presence of the pigment dispersant in the ink causes the solubility of the pigment dispersant and the organic fluorescent pigment, which have high dispersion solubility in the organic solvent, to be increased.
  • the content of the pigment dispersant in the ink is preferably in the range of 1% by weight to 5% by weight. More preferably, it is 3% by weight or less.
  • the content of the pigment dispersant in the ink for ink jet recording is less than 1% by weight, the storage stability of the ink for ink jet recording cannot be maintained, which is not preferable.
  • it exceeds 5% by weight the blocking property and chemical resistance of the printed matter are insufficient, which is not preferable.
  • the binder resin is a combination of a high molecular weight resin and a low molecular weight resin.
  • the average molecular weight A of the high molecular weight resin is preferably in the range of 20000 ⁇ A ⁇ 30000.
  • the average molecular weight A is more than 10,000 and less than 20,000, it is not preferable because the adhesion to the recording substrate and the stable ejection performance from the recording head are impaired.
  • the average molecular weight A exceeds 30000, the adhesion to the recording substrate, the stable ejection performance from the recording head, and the drying property of the printed matter are impaired, which is not preferable.
  • the average molecular weight B of the low molecular weight resin is preferably in the range of 1000 ⁇ B ⁇ 10000.
  • the average molecular weight B is less than 1000, not only the adhesiveness of the printed matter is impaired, but also the solid content concentration in the ink becomes high and the stable ejection performance from the recording head is impaired, which is not preferable.
  • the average molecular weight B is more than 10,000 and less than 20,000, the viscosity of the ink becomes high even when added in a small amount, and it becomes difficult to obtain stable ejection performance from the recording head.
  • the ratio of the resin weight% of the average molecular weight A and the average molecular weight B of the binder resin is 1.0 ⁇ ((resin weight% of average molecular weight A) / (resin weight% of average molecular weight B)) ⁇ 5.0.
  • the ratio range of 1.0 ⁇ ((resin weight% of average molecular weight A) / (resin weight% of average molecular weight B)) ⁇ 3.0 is particularly preferable.
  • the ratio of the resin molecular weight% of the average molecular weight A and the average molecular weight B is less than 1.0, the adhesion to the recording substrate and the stable ejection performance from the recording head are impaired, which is not preferable.
  • the ratio of the resin molecular weight% of the average molecular weight A and the average molecular weight B exceeds 5.0, it is not preferable because the drying property of the printed matter and the stable ejection performance from the recording head are impaired.
  • the content of the binder resin in the ink is preferably in the range of 1% by weight to 20% by weight, and more preferably 2% by weight to 10% by weight.
  • the content of the binder resin in the ink for ink jet recording is less than 1% by weight, the adhesion with the recording substrate becomes insufficient.
  • it exceeds 20% by weight the viscosity of the ink for ink jet recording becomes high, and it is not preferable because stable ejection performance from the recording head cannot be maintained.
  • more fluorescent ink can be fixed on the recording substrate, the visibility is better.
  • recording is performed by discharging fluorescent ink from a recording head, the more fluorescent fluorescent pigment on the recording substrate, the stronger the fluorescent color.
  • double the amount of ink is fixed by discharging the fluorescent ink in the same position on the recording substrate.
  • twice the amount of the organic fluorescent color pigment can be fixed at the same position. Visibility can be further increased by using such a recording method.
  • the organic solvent which is the solvent for the ink jet recording ink is used as a main solvent having a proportion of 50% by weight or more in the solvent, and at least one selected from glycol monoacetates and glycol ethers is used alone or in combination. When this organic solvent is used, it can be satisfactorily discharged from the recording head.
  • ethylene glycol monobutyl ether acetate (ethylene glycol monobutyl ether acetate is hereinafter referred to as BGAc) is particularly preferable from the viewpoint of solubility of the binder resin and the organic fluorescent pigment.
  • aromatic compounds such as toluene and xylene, ⁇ -butyrolactone ( ⁇ -butyrolactone is hereinafter referred to as GBL), lactone solvents such as ⁇ -valerolactone, N-methyl-2-pyrrolidone, N-ethyl Examples thereof include nitrogen-containing compounds such as -2-pyrrolidone and acetonitrile.
  • GBL ⁇ -butyrolactone
  • lactone solvents such as ⁇ -valerolactone
  • N-methyl-2-pyrrolidone N-ethyl
  • nitrogen-containing compounds such as -2-pyrrolidone and acetonitrile.
  • Additives that can be used include plasticizers, surface conditioners, UV inhibitors, light stabilizers, antioxidants, and the like.
  • Ink jet recording ink is manufactured by adding a binder resin and an organic solvent to a pigment dispersion obtained by dissolving an organic fluorescent pigment and a pigment dispersant in an organic solvent in advance, and stirring the mixture using a stirrer.
  • Ink for ink jet recording is used in an ink jet recording apparatus while being stored in an ink cartridge.
  • the ink cartridge will be described with reference to FIG.
  • FIG. 1 is an exploded perspective view of an ink cartridge according to a preferred embodiment of the present invention.
  • the ink cartridge 1 includes a flexible pouch (ink bag) 2 in which ink for ink jet recording is accommodated, and an upper case 3 and a lower case 4 in which the pouch 2 is accommodated.
  • a flexible pouch ink bag 2 in which ink for ink jet recording is accommodated
  • an upper case 3 and a lower case 4 in which the pouch 2 is accommodated.
  • ink for ink jet recording is stored in the pouch 2.
  • the case 4 which is the upper case 3 is fitted, and the pouch 2 is stored inside.
  • Pouch 2 has two layers of aluminum foil to improve gas barrier properties, for example, two aluminum laminate films sandwiched between nylon film on the outside and polyethylene film on the inside, and the periphery is joined by thermal welding or the like Is made up of.
  • One end of the pouch 2 is provided with an ink outlet 5 for discharging the ink contained therein to the outside.
  • the lower case 4 is provided with a hole through which the ink outlet 5 is exposed.
  • This ink cartridge is manufactured by a process including a step of filling and storing the ink for ink jet recording in the pouch 2 and a step of storing the pouch 2 in the case 4 having the upper case 3 as the pouch 2. Further, the ink filling preferably includes a step of putting ink in an opening of the pouch 2 in a vacuum chamber, degassing, and sealing the opening.
  • the ink cartridge shown in FIG. 1 that accommodates ink for ink jet recording is a preferred embodiment of the ink cartridge of the present invention, but the ink cartridge of the present invention is not limited to this form of ink cartridge.
  • part represents “part by weight”.
  • the composition of ink for inkjet recording is summarized in Table 1.
  • an organic fluorescent pigment, a pigment dispersant, an organic solvent, and a binder resin were prepared so that the total amount was 100 parts.
  • a binder resin and an organic solvent are added to a pigment dispersion in which an organic fluorescent pigment and a pigment dispersant are dissolved in an organic solvent in advance, and the binder resin is stirred for 4 hours at a rotational speed of 1200 rpm while being heated to 60 ° C. Was dissolved to obtain an ink for inkjet recording.
  • Example 1 The organic solvent is 75.4 parts of BGAc, 3.8 parts of GBL, 14.0 parts of organic fluorescent pigment, 2.8 parts of pigment dispersant, and the vinyl chloride resin (average molecular weight 25000) is 2.
  • An ink was prepared using 0 part and 2.0 parts of a modified acrylic copolymer (average molecular weight 4600).
  • Example 2 The organic solvent is 75.4 parts of BGAc, 3.8 parts of GBL, 14.0 parts of organic fluorescent pigment, 2.8 parts of pigment dispersant, and the vinyl chloride resin (average molecular weight 25000) is 2.
  • An ink was prepared using 0 part, 2.0 parts of a polyester resin (average molecular weight 1800) (Example 3) The organic solvent is 75.4 parts of BGAc, 3.8 parts of GBL, 14.0 parts of organic fluorescent pigment, 2.8 parts of pigment dispersant, and the vinyl chloride resin (average molecular weight 25000) is 2.
  • An ink was prepared using 0 part and 2.0 parts of a modified styrene / acrylic polymer (average molecular weight 8100).
  • Example 4 The organic solvent is 75.4 parts of BGAc, 3.8 parts of GBL, 14.0 parts of organic fluorescent pigment, 2.8 parts of pigment dispersant, and the vinyl chloride resin (average molecular weight 25000) is 3. An ink using 0 part and 1.0 part of a modified acrylic copolymer (average molecular weight 4600) was prepared.
  • the organic solvent is 83.3 parts of BGAc, 3.8 parts of GBL, 7.0 parts of organic fluorescent pigment, 0.9 part of the pigment dispersant, and the vinyl chloride resin (average molecular weight 25000) is 3.
  • An ink was prepared using 0 part and 2.0 parts of a modified acrylic copolymer (average molecular weight 4600).
  • the organic solvent is 59.5 parts of BGAc, 3.8 parts of GBL, 30.5 parts of organic fluorescent pigment, 5.2 parts of pigment dispersant, and the binder resin is 0.1% of vinyl chloride resin (average molecular weight 25000).
  • An ink was prepared using 5 parts of 0.5 parts of a modified acrylic copolymer (average molecular weight 4600).
  • the organic solvent is 75.4 parts BGAc, 3.8 parts GBL, 14.0 parts organic fluorescent pigment, 2.8 parts pigment dispersant, and vinyl acetate resin (average molecular weight 25000) is 4. binder resin. Ink was used for 0 parts.
  • the organic solvent is 75.4 parts of BGAc, 3.8 parts of GBL, 14.0 parts of organic fluorescent pigment, 2.8 parts of pigment dispersant, and the vinyl chloride resin (average molecular weight 38000) is 2.
  • An ink was prepared using 0 part and 2.0 parts of a modified acrylic copolymer (average molecular weight 4600).
  • the organic solvent is 75.4 parts of BGAc, 3.8 parts of GBL, 14.0 parts of organic fluorescent pigment, 2.8 parts of pigment dispersant, and the vinyl chloride resin (average molecular weight 12000) is 2.
  • An ink was prepared using 0 part and 2.0 parts of a modified acrylic copolymer (average molecular weight 4600).
  • the organic solvent is 75.4 parts of BGAc, 3.8 parts of GBL, 14.0 parts of organic fluorescent pigment, 2.8 parts of pigment dispersant, and the vinyl chloride resin (average molecular weight 25000) is 2.
  • An ink was prepared using 0 part and 2.0 parts of a modified styrene / acrylic polymer (average molecular weight 16500).
  • the organic solvent is 75.4 parts of BGAc, 3.8 parts of GBL, 14.0 parts of organic fluorescent pigment, 2.8 parts of pigment dispersant, and 2.0 parts of polyester resin (average molecular weight 25000) as the binder resin. Then, an ink using 2.0 parts of a modified acrylic copolymer (average molecular weight 4600) was prepared.
  • the organic solvent is 74.9 parts of BGAc, 3.8 parts of GBL, 14.0 parts of organic fluorescent pigment, 2.8 parts of pigment dispersant, and the vinyl chloride resin (average molecular weight 25000) is 1.
  • An ink was prepared using 5 parts of 3.0 parts of a modified acrylic copolymer (average molecular weight 4600).
  • the organic solvent was 76.3 parts of BGAc, 3.8 parts of GBL, 14.0 parts of organic fluorescent pigment, 2.8 parts of pigment dispersant, and the binder resin was 2.2 parts of vinyl chloride resin (average molecular weight 25000).
  • An ink was prepared using 6 parts and 0.5 part of a modified acrylic copolymer (average molecular weight 4600).
  • the inks for ink jet recording obtained in Examples 1 to 4 and Comparative Examples 1 to 10 described above were subjected to a visibility test, a blocking test, a chemical resistance test, a physical resistance test, a gloss test, and an ink storage stability. A test and a continuous discharge performance test were conducted. The test results were evaluated according to the following criteria. The evaluation results are as shown in Table 2.
  • ⁇ Visibility test> The inkjet recording ink was applied to a PVC substrate using a No. 6 Mayer bar (manufactured by RD Specialties) and dried at 25 ° C. for 2 days. Visibility of the dried coated surface was visually evaluated using a 3M Scotchcal fluorescent film series (manufactured by Sumitomo 3M) as a comparative control. The results were classified as follows and shown in the table. ⁇ : Visibility equivalent to or better than that of the comparative control product could be obtained. X: Visibility equivalent to that of the comparative control product could not be obtained.
  • ⁇ Chemical resistance test> The inkjet recording ink was applied to a PVC substrate using a No. 6 Mayer bar (manufactured by RD Specialties) and dried at 25 ° C. for 2 days. The dried coated surface was rubbed 20 times with a cloth soaked with the following chemicals, and the coated surface was visually evaluated.
  • the chemicals used for resistance evaluation are 50% ethanol aqueous solution, neutral detergent, alkaline detergent, oxygen bleach and chlorine bleach. The results are classified as follows and shown in the table. ⁇ : No abnormality in the coated surface was confirmed for all chemicals. (Triangle
  • the inkjet recording ink was applied to a PVC substrate using a No. 6 Mayer bar (manufactured by RD Specialties) and dried at 25 ° C. for 2 days. Resistance of the dried coated surface was evaluated by the following test method.
  • the test method used was a rubbing test in which the coated surfaces were rubbed 50 times with a test cloth piece (for JIS dyeing fastness test), a cross-cut test on the coated surface, a bending resistance test for bending the coated surfaces, and 50 times between coated surfaces. This is a rubbing resistance test.
  • the results are classified as follows and shown in the table.
  • ⁇ The coated surface did not peel off by any method.
  • ⁇ The coated surface was peeled off by several methods.
  • X The coated surface was peeled off by all methods.
  • ⁇ Glossiness test> The inkjet recording ink was applied to a PVC substrate using a No. 6 Mayer bar (manufactured by RD Specialties) and dried at 25 ° C. for 2 days. The dried coated surface was measured for gloss at a measurement angle of 60 ° using a gloss meter micro-TRI-gloss manufactured by BYK-Gardner. The results are classified as follows and shown in the table. ⁇ : The glossiness was 60 or more. ⁇ : Glossiness was 20 or more and less than 60. X: The glossiness was less than 20.
  • ⁇ Ink storage stability test> The ink for inkjet recording was stored at 60 ° C. for 4 weeks and at ⁇ 15 ° C. for 4 weeks, and the viscosity before and after storage was measured to calculate the rate of change.
  • the viscosity of the inkjet recording ink was measured with a viscometer VISCOMETER TV-33 manufactured by Toki Sangyo Co., Ltd. The results are classified as follows and shown in the table.
  • A Viscosity change rate before and after storage at 60 ° C. and ⁇ 15 ° C. was less than ⁇ 5%.
  • ⁇ One of the rate of change in viscosity before and after storage at 60 ° C. and ⁇ 15 ° C. was less than ⁇ 5%.
  • X Viscosity change rate before and after storage at 60 ° C. and ⁇ 15 ° C. was ⁇ 5% or more.
  • Comparative Example 1 has poor visibility because the organic fluorescent pigment concentration in the ink is less than 8% by weight. Furthermore, since the pigment dispersant concentration in the ink is less than 1% by weight, it can be seen that the storage stability of the ink is poor.
  • Comparative Example 2 since the concentration of the organic fluorescent pigment in the ink exceeds 30% by weight, the amount of the binder resin added is suppressed when trying to adjust the viscosity so that it can be discharged from the recording head. It can be seen that physical resistance, ink storage stability, and continuous printability are poor. Further, since the concentration of the pigment dispersant in the ink exceeds 5% by weight, it can be seen that the printed matter has poor blocking properties and chemical resistance.
  • Comparative Example 3 does not use a low molecular weight resin in combination with the binder resin, so that it can be seen that the blocking property, chemical resistance, and continuous printability are poor.
  • Comparative Example 4 shows that blocking property, chemical resistance, physical resistance, and continuous printability are poor because no high molecular weight resin is used in combination with the binder resin.
  • Comparative Example 5 shows that the continuous printability is poor because a vinyl acetate resin having an average molecular weight exceeding 30000 is used as the binder resin.
  • Comparative Example 6 does not use a vinyl acetate resin having an average molecular weight of 20000 or more and 30000 or less for the binder resin, so that it is understood that the chemical resistance, physical resistance, and continuous printability are poor.
  • Comparative Example 7 does not use an acrylic resin or a polyester resin having an average molecular weight of 1000 or more and 10,000 or less for the binder resin, so that it is understood that the continuous printability is poor.
  • Comparative Example 8 does not use a vinyl acetate resin having an average molecular weight of 20000 or more and 30000 or less for the binder resin, so that it is understood that the chemical resistance, physical resistance, and continuous printability are poor.
  • Comparative Example 9 is found to have poor chemical resistance, physical resistance, and continuous printability because the ratio of the high molecular weight resin as the binder resin to the low molecular weight resin is less than 1.0.
  • Comparative Example 10 shows that the blocking property and continuous printability are poor because the ratio of the high molecular weight resin, which is the binder resin, to the low molecular weight resin exceeds 5.0.
  • Example 1 the content of the organic fluorescent pigment is 14.0% by weight, a vinyl acetate resin having a molecular weight of 25000 and an acrylic resin having a molecular weight of 4600 are used in combination for the binder resin, and the ratio of the high molecular weight resin to the low molecular weight resin is Since it is 1.0, it turns out that a favorable result is obtained in all the tests of visibility, blocking property, chemical resistance, physical resistance, glossiness, ink storage stability, and continuous printability.
  • Example 2 the content of the organic fluorescent pigment is 14.0% by weight, a vinyl chloride resin having a molecular weight of 25000 and a polyester resin having a molecular weight of 1800 are used in combination as the binder resin, and the ratio of the high molecular weight resin to the low molecular weight resin is 1. 0, it can be seen that good results are obtained in all tests of visibility, blocking property, chemical resistance, physical resistance, glossiness, ink storage stability, and continuous printability.
  • Example 3 the content of the organic fluorescent pigment is 14.0% by weight, a vinyl chloride resin having a molecular weight of 25000 and an acrylic resin having a molecular weight of 8100 are used in combination for the binder resin, and the ratio of the high molecular weight resin to the low molecular weight resin is Since it is 1.0, it turns out that a favorable result is obtained in all the tests of visibility, blocking property, chemical resistance, physical resistance, glossiness, ink storage stability, and continuous printability.
  • Example 4 the content of the organic fluorescent pigment is 14.0% by weight, a vinyl acetate resin having a molecular weight of 25000 and an acrylic resin having a molecular weight of 4600 are used in combination as the binder resin, and the ratio of the high molecular weight resin to the low molecular weight resin is Since it is 3.0, it turns out that a favorable result is obtained in all the tests of visibility, blocking property, chemical resistance, physical resistance, glossiness, ink storage stability, and continuous printability.
  • the content of the organic fluorescent pigment is preferably 8 to 30% by weight.
  • the binder resin requires the use of a high molecular weight resin and a low molecular weight resin in combination.
  • the high molecular weight binder resin is a vinyl acetate resin, and the average molecular weight must be 20000 or more and 30000 or less.
  • the binder resin having a lower molecular weight is an acrylic resin or a polyester resin, and the average molecular weight must be 1000 or more and 10,000 or less.
  • the organic fluorescent pigment is dissolved in the ink for ink jet recording, and the binder resin is used in combination with a high molecular weight resin and a low molecular weight resin, so that the safety and storage of the ink for ink jet recording are preserved. It can be seen that an inkjet recording ink and an ink cartridge having stability, stable ejection performance from a recording head, and drying of printed matter can be provided.
  • a shuttle type ink jet recording apparatus is used in which a recording head is mounted on a carriage that reciprocates in the main scanning direction over the recording substrate, and recording is performed by a plurality of scans. For example, when recording is performed by four scans, the recording base is transported in the sub-scanning direction for each quarter width of the recording head, and after each transport, ink is ejected, so that the nozzle is located at the same position on the recording base. Can be discharged four times.
  • ink is ejected onto the recording substrate while scanning the carriage in the main scanning direction.
  • the recording substrate is moved in the sub-scanning direction by a quarter width of the recording head, and ink is ejected onto the recording substrate while scanning the carriage in the main scanning direction.
  • Ink can be ejected to the same position up to four times in one scan. That is, recording can be performed at a high density, the visibility is excellent, and the organic fluorescent pigment is fixed thickly, so that the light resistance is also increased.
  • the present invention can be suitably applied to ink for inkjet recording.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Ink Jet (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)

Abstract

L'invention concerne une encre d'impression à jet d'encre présentant une sécurité, une stabilité en stockage, des performances d'éjection stables par une tête d'impression, et des propriétés de séchage de la matière imprimée sous forme d'une encre d'impression à jet d'encre contenant un pigment fluorescent organique et elle concerne aussi une cartouche d'encre. L'encre d'impression à jet d'encre peut être avantageusement utilisée dans un dispositif d'impression à jet d'encre et une cartouche d'encre qui stocke cette encre peut être obtenue par l'utilisation d'une encre d'impression à jet d'encre comprenant un pigment fluorescent organique, un agent dispersant le pigment, un solvant organique et une résine lieuse, le solvant organique étant un solvant principal, le pigment fluorescent organique étant dissous dans le solvant organique, et une résine de haut poids moléculaire et une résine de faible poids moléculaire étant conjointement utilisées comme résine lieuse.
PCT/JP2012/079903 2011-12-15 2012-11-19 Encre d'impression à jet d'encre, cartouche d'encre, procédé de fabrication d'encre d'impression à jet d'encre, procédé de fabrication de cartouche d'encre, et procédé d'impression WO2013088907A1 (fr)

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JP2011-274638 2011-12-15
JP2011274638 2011-12-15
JP2012206085A JP6058955B2 (ja) 2011-12-15 2012-09-19 インクジェット記録用インク、インクカートリッジ、インクジェット記録用インクの製造方法、インクカートリッジの製造方法、記録方法
JP2012-206085 2012-09-19

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CN111433318A (zh) * 2017-12-05 2020-07-17 法国原子能源和替代能源委员会 用于填充微米级腔的溶液
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JP5987240B2 (ja) * 2012-08-29 2016-09-07 ゼネラル株式会社 非水性インクジェットインクとその製造方法
US10563081B2 (en) 2016-03-31 2020-02-18 Dnp Fine Chemicals Co., Ltd. Ink composition for ink-jet recording, ink-set for ink-jet recording, ink cartridge, and method for producing printing

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