WO2017029866A1 - インクジェット用水性インク組成物 - Google Patents
インクジェット用水性インク組成物 Download PDFInfo
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- WO2017029866A1 WO2017029866A1 PCT/JP2016/067740 JP2016067740W WO2017029866A1 WO 2017029866 A1 WO2017029866 A1 WO 2017029866A1 JP 2016067740 W JP2016067740 W JP 2016067740W WO 2017029866 A1 WO2017029866 A1 WO 2017029866A1
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- mass
- inkjet
- pigment
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/32—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. carbomers, poly(meth)acrylates, or polyvinyl pyrrolidone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
- B41F17/36—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on tablets, pills, or like small articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
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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
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/324—Inkjet printing inks characterised by colouring agents containing carbon black
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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
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/324—Inkjet printing inks characterised by colouring agents containing carbon black
- C09D11/326—Inkjet printing inks characterised by colouring agents containing carbon black characterised by the pigment dispersant
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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
- C09D11/30—Inkjet printing inks
- C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
Definitions
- the present invention relates to an aqueous inkjet ink composition, and more specifically, an edible inkjet aqueous ink composition that is excellent in dispersibility and can be directly printed on tablets such as pharmaceuticals and foods by an inkjet method. Related to things.
- Tablets with a coated surface can be printed by a contact method such as gravure printing, so information with high discrimination is displayed on the one hand, but uncoated or OD (orally disintegrating) tablets with poor surface smoothness are in contact. Printing by the method is difficult. Therefore, for these tablets, a marking method that can display only simple characters has become the mainstream. As a result, in the pharmaceutical industry in particular, there is an increasing need for a new printing method capable of displaying highly discriminating information even for uncoated tablets, OD tablets and the like.
- Examples of such a printing method include direct printing by an inkjet method using an aqueous inkjet ink composition (hereinafter referred to as “aqueous ink composition”).
- aqueous ink composition aqueous inkjet ink composition
- a water-based ink composition in order to directly print on a tablet by an ink jet method, it is necessary to use a water-based ink composition having excellent ejection stability.
- the present invention has been made in view of the above-mentioned problems, and the object thereof is an edible property that is excellent in ejection stability and can be directly printed by an inkjet method on tablets such as pharmaceuticals and foods. It is providing the water-based ink composition for inkjet.
- the inventors of the present application have studied water-based ink compositions for ink jets in order to solve the above problems. As a result, the inventors have found that the above problems can be solved by adopting the following configuration, and have completed the present invention.
- the aqueous ink composition for ink jet according to the present invention is an aqueous ink composition for ink jet recording used for ink jet recording in order to solve the above-described problems, and is a discharge mainly composed of a colorant and polyglyceryl caprylate. And at least a stabilizer, the HLB of the discharge stabilizer is 15 or more, it is contained in the range of 1% by mass to 5% by mass with respect to the total mass, and the surface tension at 25 ° C. is in the range of 25 mN / m to 40 mN / m. It is characterized by being.
- the ink jet printing is performed by containing the discharge stabilizer having polyglyceryl caprylate as the main component and HLB of 15 or more in the range of 1% by mass to 5% by mass with respect to the total mass.
- the ejection stability from the ink jet head can be improved.
- polyglyceryl caprylate complies with the standards of pharmaceutical additives, Japanese pharmacopoeia or official food additives specified by the Pharmaceutical Affairs Law, so it is printed directly on solid preparations such as pharmaceuticals and foods. Making it possible.
- the surface tension is set at 25 ° C. to 25 mN / m or more, it is possible to prevent poor printing due to adhesion to the nozzle plate when ejecting droplets of the aqueous ink composition from the inkjet head. it can. In addition, it is possible to prevent the sphericity and discharge speed of the droplets of the water-based ink composition from decreasing, and to improve the droplet discharge stability. On the other hand, when the surface tension is 40 mN / m or less, it is possible to prevent the discharge stability from being lowered.
- “Inkjet recording” means a system in which an aqueous inkjet ink composition is ejected as droplets from a fine inkjet head, the droplets are fixed on a recording medium, and an image is formed. It is not limited to the above, and includes solid preparations such as pharmaceuticals and foods.
- the colorant is carbon black as a pigment, and further, as a pigment dispersant, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether, polysorbate, decaglyceryl oleate and polyacrylic acid It may contain at least one surfactant selected from the group consisting of sodium.
- HLB of the said polyoxyethylene hydrogenated castor oil is 10 or more.
- the aqueous inkjet ink composition according to the present invention preferably has edible properties.
- Edible means that it consists only of substances that are approved for oral administration as pharmaceuticals or pharmaceutical additives and / or substances that are approved as foods or food additives.
- the solid preparation according to the present invention is a solid preparation having a dry film of an aqueous inkjet ink on the surface, and the inkjet aqueous ink is obtained from the inkjet aqueous ink composition. It is characterized by becoming.
- the water-based ink for ink-jets contains, as a main component, water-based ink for ink-jet, a discharge stabilizer having a main component of polyglyceryl caprylate and an HLB of 15 or more in a range of 1% by mass to 5% by mass with respect to the total mass. Since the composition is used, a dry film capable of forming a good printed image is formed even when printing directly on the surface of the solid preparation by the ink jet recording method with the water-based ink jet ink. Can do. Thereby, it is possible to display product information on the solid preparation main body, and it is possible to provide a solid preparation that can improve identification and prevent dispensing mistakes and accidental ingestion.
- the solid preparation of the present invention is meant to include food preparations and pharmaceutical preparations.
- a discharge stabilizer having a main component of polyglyceryl caprylate and having an HLB of 15 or more is contained in the range of 1% by mass to 5% by mass with respect to the total mass, thereby being excellent in discharge stability.
- An aqueous ink composition for inkjet can be provided.
- polyglyceryl caprylate complies with the standards of pharmaceutical additives, Japanese pharmacopoeia or official food additives specified by the Pharmaceutical Affairs Law, so it can be printed directly on solid preparations such as pharmaceuticals and foods. is there. As a result, it is possible to display product information on the solid preparation main body, thereby improving discrimination and preventing dispensing errors and accidental ingestion.
- an edible ink jet aqueous ink composition that is excellent in ejection stability and can be directly printed by an ink jet method on solid preparations such as pharmaceuticals and foods, and the ink jet aqueous A solid formulation printed with the ink composition can be provided.
- Water-based ink composition for inkjet The water-based ink composition for inkjet according to the present embodiment (hereinafter referred to as “water-based ink composition”) will be described below using a pigment as an example of a colorant.
- the water-based ink composition according to the present embodiment is a water-based ink containing at least a pigment composition and an ejection stabilizer mainly composed of polyglyceryl caprylate, and the main solvent is water.
- the water-based ink composition of the present embodiment can be made edible by using a material that complies with standards such as the Pharmaceutical Affairs Law, and is suitably used for inkjet recording. is there.
- a water-based ink composition uses a pigment as a coloring material, it is superior in terms of color developability, light resistance, water resistance and the like as compared with a water-based ink composition using a dye.
- the pigment composition is a composition containing at least a pigment and a pigment dispersant.
- carbon black or the like that is usually used in an aqueous inkjet ink composition can be used.
- the carbon black include channel black, furnace black, acetylene black, and thermal black.
- a commercial item as carbon black of this Embodiment, As such a commercial item, # 900, # 970, # 100, # 2200, # 2300, # 2350, # 2600, MA-7, MA-8, MA-100, MA-11, MCF88, # 45L, # 50, # 10, # 33, # 40, # 4000, # 52, CF9, etc.
- pigments can be used alone or in admixture of two or more as required.
- carbon black is a pharmaceutical additive specified by the Pharmaceutical Affairs Law, Japanese Pharmacopoeia or the standard for food additives. It is preferable to use one that conforms to.
- the average primary particle size of the carbon black is preferably 10 nm to 40 nm.
- the average primary particle diameter is an arithmetic average particle diameter obtained by observing the carbon black particles before being dispersed in a solvent together with a dispersing agent by SEM (scanning electron microscope) or TEM (transmission electron microscope). Means.
- iron oxide can be used as the pigment.
- the iron oxide include yellow iron oxide, yellow ferric oxide, ferric oxide, red iron oxide, black iron oxide, and the like. These pigments can be used alone or in admixture of two or more as required.
- iron oxide is a pharmaceutical additive specified by the Pharmaceutical Affairs Law, Japanese Pharmacopoeia or Food Additives Standards It is preferable that it is suitable.
- the content of the pigment directly affects the image density, and since it affects the storability, viscosity, pH, and printing density of the aqueous ink composition when printing on a solid preparation, these It is sufficient to set appropriately considering this point.
- the pigment is carbon black
- it is usually preferably in the range of 0.5 to 40% by mass, more preferably in the range of 1 to 25% by mass, based on the total mass of the pigment composition.
- By setting the carbon black content to 0.5% by mass or more a decrease in image density can be suppressed.
- by setting the carbon black content to 40% by mass or less it is possible to prevent a decrease in gloss, nozzle clogging, and a decrease in ejection stability.
- the pigment is iron oxide
- it is usually in the range of 0.5% to 40% by weight and more preferably in the range of 1% to 25% by weight with respect to the total weight of the pigment composition.
- the average dispersed particle diameter D50 of the pigment in the dispersed state is preferably in the range of 50 nm to 200 nm, and more preferably in the range of 85 nm to 140 nm.
- the D50 is preferably in the range of 25 nm to 300 nm, more preferably in the range of 100 nm to 300 nm, still more preferably in the range of 75 nm to 250 nm, and in the range of 75 nm to 210 nm. Particularly preferred.
- the cumulative 99% value (D99) of the particle size distribution of the carbon black is preferably in the range of 100 nm to 500 nm.
- D99 of the iron oxide is preferably in the range of 100 nm to 900 nm, more preferably in the range of 100 nm to 600 nm, and particularly preferably in the range of 100 nm to 500 nm.
- the average dispersed particle diameters D50 and D99 of the pigment are values measured by a dynamic light scattering method using Microtrac UPA-EX150 (trade name, manufactured by Nikkiso Co., Ltd.).
- pigment dispersant those usually used in an aqueous inkjet ink composition can be used.
- specific examples include nonionic surfactants and anionic surfactants.
- the nonionic surfactant include polyoxyethylene hydrogenated castor oil, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene oleyl ether, polyoxyethylene stearyl ether, and polyoxyethylene behenyl ether. Examples thereof include oxyethylene alkyl ether, polysorbate, and decaglyceryl oleate.
- examples of the anionic surfactant include sodium polyacrylate. These may be used alone or in admixture of two or more.
- the pigment composition of the present embodiment when used for printing on the surface of solid preparations such as pharmaceuticals and foods, it conforms to the standards of pharmaceutical additives, Japanese pharmacopoeia or official food additives specified by the Pharmaceutical Affairs Law. Is preferably used.
- the polyoxyethylene hydrogenated castor oil is suitable for improving the dispersibility of the pigment made of carbon black.
- Polyoxyethylene hydrogenated castor oil conforms to the standards for pharmaceutical additives and the like under the Pharmaceutical Affairs Law. Therefore, polyoxyethylene hydrogenated castor oil can be suitably used for printing on solid preparations such as pharmaceuticals and foods.
- the polyoxyethylene hydrogenated castor oil is not particularly limited. For example, polyoxyethylene hydrogenated castor oil (20E.O.) (polyoxyethylene glycerin trioxystearic acid 20), polyoxyethylene hydrogenated castor oil (40E.O.
- Examples of the polyoxyethylene hydrogenated castor oil (20E.O.) include Nikkor HCO-20 (trade name, manufactured by Nikko Chemicals Co., Ltd.), Emarex HC-20 (trade name, manufactured by Nihon Emulsion Co., Ltd.). And UNIOX HC-20 (trade name, manufactured by NOF Corporation).
- polyoxyethylene hydrogenated castor oil examples include Nikkor HCO-40 (trade name, manufactured by Nikko Chemicals Co., Ltd.), UNIOX HC-40 (manufactured by Nikko Co., Ltd.), and Emanon CH40. (Kao Co., Ltd.), Cremophor (trade name, manufactured by BASF Japan Co., Ltd.), Oil Mugin HRE40 (trade name, manufactured by Henkel Japan Co., Ltd.), Emarex HC-40 (trade name, Nippon Emulsion Co., Ltd.) Manufactured) and the like.
- polyoxyethylene hydrogenated castor oil examples include Nikkor HCO-50 (trade name, manufactured by Nikko Chemicals Co., Ltd.), UNIOX HC-50 (trade name, manufactured by Nikko Co., Ltd.). And Emalex HC-50 (trade name, manufactured by Nippon Emulsion Co., Ltd.).
- polyoxyethylene hydrogenated castor oil examples include Nikkor HCO-60 (trade name, manufactured by Nikko Chemicals Co., Ltd.) and UNIOX HC-60 (trade name, manufactured by Nikko Co., Ltd.).
- Emanon CH-60 trade name, manufactured by Kao Co., Ltd.
- Cremophor trade name, manufactured by BASF Japan Ltd.
- Oil Mugin HRE60 trade name, manufactured by Henkel Japan Co., Ltd.
- Emalex HC-60 Trade name, manufactured by Nippon Emulsion Co., Ltd.
- polyoxyethylene hydrogenated castor oil examples include Nikkor HCO-100 (trade name, manufactured by Nikko Chemicals Co., Ltd.) and UNIOX HC-100 (trade name, manufactured by Nikko Co., Ltd.). And Emalex HC-100 (trade name, manufactured by Nippon Emulsion Co., Ltd.).
- the HLB (hydrophilic lipophilic ratio) of the polyoxyethylene hydrogenated castor oil is preferably 10 or more, and more preferably 10-18.
- the HLB is 10 or more, the affinity of the polyoxyethylene hydrogenated castor oil for the dispersion medium is improved, and the dispersion stability is improved.
- the upper limit value of the HLB is not particularly limited, but if it is greater than 18, the affinity with the dispersion medium is too good, and the polyoxyethylene hydrogenated castor oil is easily detached from the pigment surface, resulting in a decrease in dispersion stability. There is a case.
- the HLB value is an HLB value according to the Griffin method and means a value obtained by the following equation.
- HLB value 20 ⁇ (sum of formula weight of hydrophilic group / molecular weight)
- the HLB value is a value in the range of 0 to 20. The larger the HLB value, the stronger the hydrophilicity, and the smaller the HLB value, the stronger the hydrophobicity.
- the content ratio of the pigment and the pigment dispersant is preferably 1: 0.2 to 1: 4, more preferably 1: 0.5 to 1: 1 on a mass basis.
- the content ratio is 1: 0.2 or more, it is possible to prevent a decrease in dispersibility of the pigment.
- the content ratio is 1: 4 or less, for example, when used in an aqueous inkjet ink composition, it is possible to prevent a decrease in ejection stability due to adhesion of a nozzle plate.
- a dispersion medium for dispersing the pigment is included.
- the dispersion medium include water, and more specifically, pure water such as ion-exchanged water, ultrafiltrated water, reverse osmosis water, and distilled water, or those obtained by removing ionic impurities such as ultrapure water.
- water sterilized by ultraviolet irradiation or addition of hydrogen peroxide is preferable because generation of mold and bacteria can be prevented over a long period of time.
- it is not specifically limited as content of a dispersion medium, It can set as needed suitably.
- a mixed solution of water and a water-soluble organic solvent may be used.
- the water-soluble organic solvent is not particularly limited, and specifically, for example, alcohols such as methyl alcohol, ethyl alcohol, n-butyl alcohol, isobutyl alcohol, tert-butyl alcohol, n-propyl alcohol, isopropyl alcohol; Amides such as dimethylformamide and dimethylacetamide; Ketones such as acetone and methyl ethyl ketone; Tetrahydrofuran, dioxane, ethylene glycol methyl ether, ethylene glycol ethyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, triethylene glycol monomethyl ether, triethylene glycol mono Ethers such as ethyl ether; ethylene glycol, propylene glycol, butylene glycol , Diethylene glycol, triethylene glycol, 1,2,6-hexanetriol, thi
- ethyl alcohol, n-butyl alcohol, isobutyl alcohol, n-propyl are those that fall under the standards of pharmaceutical additives, Japanese pharmacopoeia or food additives official regulations stipulated by the Pharmaceutical Affairs Law.
- Alcohol, isopropyl alcohol, acetone, propylene glycol, polyethylene glycol and glycerin are preferred.
- the blending amount when a water-soluble organic solvent is used as the dispersion medium is not particularly limited, and can be appropriately set as necessary.
- the content of the pigment composition is preferably in the range of 0.5% by mass to 20% by mass and more preferably in the range of 1% by mass to 15% by mass with respect to the total mass of the aqueous ink composition.
- the content of the pigment composition 0.5% by mass or more, the coloring power can be improved.
- dispersibility can be improved by making the content of the pigment composition 20% by mass or less.
- the mixing method and the order of addition of the pigment, the pigment dispersant, the dispersion medium, and other additives blended as necessary are not particularly limited.
- a pigment, a pigment dispersant, water as a dispersion medium, and the like may be mixed at a time, and the mixture may be subjected to a dispersion treatment using a normal disperser.
- the dispersion time at this time is not particularly limited, but is preferably set so that the average dispersed particle diameter of the pigment is within the above numerical range.
- the disperser used in the pigment dispersion treatment is not particularly limited as long as it is a commonly used disperser. Specific examples include a ball mill, a roll mill, a sand mill, a bead mill, a paint shaker, and a nanomizer.
- the polyglyceryl caprylate contained as a main component in the discharge stabilizer complies with the standards for pharmaceutical additives and the like stipulated by the Pharmaceutical Affairs Law, so that it can be directly printed on solid preparations such as pharmaceuticals and foods.
- Examples of the polyglyceryl caprylate include decaglyceryl caprylate.
- the HLB (hydrophilic / lipophilic ratio) of the discharge stabilizer is 15 or more, preferably in the range of 15-18.
- the upper limit value of the HLB is not particularly limited, but when it is 18 or less, the wettability of the flow path in the inkjet head can be optimized.
- the HLB value is an HLB value obtained by the Griffin method, as described above.
- the content of the ejection stabilizer is 1% by mass to 5% by mass with respect to the total mass of the aqueous ink composition, and is preferably in the range of 1% by mass to 3% by mass.
- the surface tension of the water-based ink composition of the present embodiment is in the range of 25 mN / m to 40 mN / m at 25 ° C., and preferably in the range of 27 mN / m to 36 mN / m.
- the surface tension is in the range of 25 mN / m or more, it is possible to prevent printing defects due to adhesion to the nozzle plate when discharging droplets of the aqueous ink composition from the inkjet head.
- the surface tension is 40 mN / m or less, it is possible to prevent the discharge stability from being lowered.
- the water-based ink composition according to the present embodiment contains water (water as a main solvent).
- water water as a main solvent.
- water it is preferable to use water from which ionic impurities such as ion-exchanged water, ultrafiltered water, reverse osmosis water, distilled water, or ultrapure water have been removed.
- ionic impurities such as ion-exchanged water, ultrafiltered water, reverse osmosis water, distilled water, or ultrapure water have been removed.
- water sterilized by ultraviolet irradiation or addition of hydrogen peroxide is preferable because generation of mold and bacteria can be prevented over a long period of time.
- it does not specifically limit as content of water, It can set suitably as needed.
- additives may be blended.
- it when used as an ink-jet ink for solid preparations such as pharmaceuticals, it is preferably one that complies with the standards of pharmaceutical additives, Japanese pharmacopoeia or official food additives specified by the Pharmaceutical Affairs Law.
- the additive include water-soluble resins, organic amines, surfactants, pH adjusters, chelating agents, preservatives, viscosity adjusters, and antifoaming agents.
- the content of these additives is not particularly limited, and can be appropriately set as necessary.
- the surface tension adjusting agent is not particularly limited as long as it is compatible with standards such as the Pharmaceutical Affairs Law and can adjust the surface tension of the aqueous ink composition.
- lauric acid decaglycerin ester for example, lauric acid decaglycerin ester, oleic acid decaglycerin ester, lauric acid hexaglycerin ester, oleic acid hexaglycerin ester, condensed linolenic acid tetraglycerin ester, fatty acid ester palm palm, myristic acid decaglycerin ester, stearin Acid decaglycerin ester, myristic acid hexaglycerin ester, glycerin fatty acid ester mixture, stearic acid glycerin ester (self-emulsifying type), pyroglutamic acid POE, monolauric acid polyethylene glycol (10EO), monooleic acid polyethylene glycol (6EO), polyoxy
- lauric acid decaglycerol ester (trade name: SY Glister ML-750, manufactured by Sakamoto Pharmaceutical Co., Ltd.), oleic acid decaglycerol ester ( Product name: NIKKOL DECAGLYN 1-OV, manufactured by Nikko Chemicals Co., Ltd., oleic acid decaglycerin ester (trade name; SY glycerase MO-7S, manufactured by Sakamoto Pharmaceutical Co., Ltd.), lauric acid decaglycerin ester (trade name; NIKKOL DECAGLYN 1-L, manufactured by Nikko Chemicals Co., Ltd., lauric acid hexaglycerin ester (trade name; NIKKOL HEXAGLYN 1-L, manufactured by Nikko Chemicals Co., Ltd.), lauric acid hexaglycerin ester (trade name; SY Glister ML- 500, Sakamoto Pharmaceutical ( ), Oleic acid hex
- the addition amount of the surface tension adjusting agent is preferably in a range in which the surface tension of the aqueous ink composition can be adjusted to 25 to 40 mN / m. When the addition amount is within the above range, it is possible to ensure ejection stability at the time of printing by the ink jet method.
- the wetting agent is not particularly limited as long as it conforms to standards such as the Pharmaceutical Affairs Law, and specific examples include propylene glycol, glycerin, dipropylene glycol and the like.
- the amount of the wetting agent added is preferably 3% by mass to 50% by mass and more preferably 10% by mass to 40% by mass with respect to the total mass of the aqueous ink composition.
- the water-based ink composition of the present embodiment can be produced by mixing the aforementioned components by an appropriate method. That is, for example, the polyglyceryl caprylate and other additives are added to the dispersion of the pigment composition and further diluted with water. Thereafter, the mixture is sufficiently stirred, and if necessary, filtration is performed to remove coarse particles and foreign matters that cause clogging. Thereby, the water-based ink composition which concerns on this Embodiment can be obtained.
- each material is not particularly limited, and for example, the materials can be sequentially added to a container equipped with a stirring device such as a mechanical stirrer or a magnetic stirrer to perform stirring and mixing. Moreover, it does not specifically limit as a filtration method, For example, centrifugal filtration, filter filtration, etc. are employable.
- the water-based ink composition of the present embodiment can be applied to ink and paint. Moreover, since the water-based ink composition of this Embodiment is excellent in discharge stability, it can be used conveniently for an inkjet ink. Furthermore, since the water-based ink composition of the present embodiment uses a material that complies with the standards of pharmaceutical additives, Japanese Pharmacopoeia or the Food Additives specified by the Pharmaceutical Affairs Law, it has edible properties. It is possible to print directly on the surface of a solid preparation composed of tablets or capsules such as pharmaceuticals or supplements. In addition, non-contact printing by an ink jet method is possible even for tablets with poor surface smoothness such as uncoated tablets and OD tablets. Furthermore, since the water-based ink composition using a pigment is excellent in light resistance, the occurrence of bleeding can be prevented even if it is directly printed on the surface of a solid preparation such as a pharmaceutical or a supplement.
- the solid preparation of the present embodiment is composed of a tablet or a capsule, and the surface of the solid preparation is directly printed on the surface by an ink jet recording method using an aqueous ink for ink jet comprising the aqueous ink composition.
- it has a dry film made of an aqueous ink composition.
- the water-based ink composition has excellent ejection stability and does not cause blurring in the printed image, various information for improving the user's distinguishability such as product information can be printed on the solid preparation. As a result, dispensing errors and accidental ingestion can be prevented.
- Tablets are solid at normal temperature, and for example, tablets produced by compressing and / or molding a tablet material containing an active ingredient into a certain shape are preferable.
- the capsule is preferably prepared by filling a powder, granule, liquid or the like in a capsule made of gelatin, cellulose derivative or the like, or encapsulating with a capsule base.
- the shape of a tablet and a capsule is not specifically limited, Arbitrary shapes can be employ
- the ink jet recording method for the surface of the solid preparation is not particularly limited.
- the water-based ink composition can be discharged as droplets from a fine nozzle, and the droplets can be attached to the surface of the solid preparation.
- the discharge method is not particularly limited, and for example, a known method such as continuous injection type (charge control type, spray type, etc.), on-demand type (piezo type, thermal type, electrostatic suction type, etc.) can be adopted. it can.
- the dye is not particularly limited as long as it is edible, and can be appropriately selected from, for example, conventionally known synthetic edible pigments, natural pigment derivatives, natural synthetic pigments, natural edible pigments, and the like.
- synthetic food color for example, Food Red No. 2, Food Red No. 3, Food Red No. 40, Food Red No. 102, Food Red No. 104, Food Red No. 105, Food Red No. 106, Food Red No. 4 No., Edible Yellow No. 5, Edible Blue No. 1, Edible Blue No. 2, Edible Green No. 3, and the like.
- It does not specifically limit as a natural pigment derivative For example, copper chlorophyllin sodium etc. are mentioned.
- the natural synthetic dye is not particularly limited, and examples thereof include ⁇ -carotene.
- the natural food coloring is not particularly limited, and examples thereof include anthocyanin dyes, carotenoid dyes, quinone dyes, and flavonoid dyes. You may use these individually by 1 type or in mixture of 2 or more types.
- the content of the dye is not particularly limited, but is usually in the range of 0.2% by mass to 20% by mass, preferably 1% by mass to 10% by mass with respect to the total mass of the aqueous ink composition.
- Example 1 and 2 The pigment dispersion solutions of Examples 1 and 2 were prepared with the composition shown in Table 1 below. Specifically, each material shown in Table 1 and zirconia beads were placed in a container, mixed, and dispersed at room temperature for 16 hours (dispersion time) with a disperser (Paint Shaker, manufactured by Asada Tekko Co., Ltd.). As a result, for each of Examples 1 and 2, pigment dispersion solutions having a carbon black pigment concentration of 25% by mass were obtained.
- aqueous ink compositions of Examples 1 and 2 were prepared with the blending compositions shown in Tables 2 and 3 below. Specifically, propylene glycol, water, and decaglyceryl caprylate (prepared to a concentration of 10% by mass) were added to a pigment dispersion solution composed of the pigment composition to prepare aqueous ink compositions, respectively.
- Table 1 The numerical values in Table 1 below are mass% values with respect to the total mass of the pigment dispersion solution, and the numerical values in Tables 2 and 3 are mass% values with respect to the total mass of the aqueous ink composition.
- Each material complies with the standards of pharmaceutical additives, Japanese pharmacopoeia or official food additives specified by the Pharmaceutical Affairs Law.
- Comparative Examples 1 to 3 Comparative Examples 1 to 3
- the discharge stabilizers were changed to those shown in Table 3. Otherwise, in the same manner as in Example 1, aqueous ink compositions of Comparative Examples 1 to 3 were prepared.
- Evaluation of nozzle omission and fading was performed by checking whether nozzle omission or fading was observed in the printed image when the ink jet printer was stopped after discharging the aqueous ink composition from the head and then printing was performed again. .
- the results are shown in Table 3 above.
- a circle in the table means a case where neither nozzle missing nor fading was observed.
- X means a case where at least one of nozzle missing or blurring occurs during printing.
- nozzle missing means that ink droplets (droplets) made of a water-based ink composition are not ejected from a nozzle where clogging has occurred. Fading means fading of an image at the initial stage of printing. Further, 15 min in Table 3 represents a time interval (open time) from when the water-based ink composition is first ejected from the head to when it is stopped and then printed again.
- Comparative Examples 1 to 3 it was confirmed that nozzle missing and fading occurred.
- the surface tension was the same value between the water-based ink composition of each comparative example and the water-based ink composition of each example, there was a difference in ejection stability.
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Abstract
Description
本実施の形態に係るインクジェット用水性インク組成物(以下、「水性インク組成物」という。)について、着色剤として顔料を用いた場合を例にして、以下に説明する。
HLB値=20×(親水基の式量の和/分子量)
HLB値は0~20の範囲内の値となり、HLB値が大きいほど親水性が強くなり、HLB値が小さいほど疎水性が強くなる。
本実施の形態の固体製剤は、錠剤又はカプセル剤からなり、当該固体製剤の表面には、前記水性インク組成物からなるインクジェット用水性インクを用いて、インクジェット記録方法により、その表面に直接印刷されたものであり、これにより、水性インク組成物からなる乾燥皮膜を有する。上述の通り、水性インク組成物は吐出安定性に優れ、印刷画像にかすれなども発生しないので、固体製剤には、製品情報など使用者の識別性を向上させるための各種情報を印刷することでき、その結果、調剤ミスや誤飲の防止が可能になる。
本実施の形態に於いては、着色剤として顔料を用いる場合を例にして説明した。しかし、本発明はこれに限定されず、例えば、染料を用いることも可能である。この場合、必要に応じて、他の公知の添加剤を添加してもよい。
下記表1に示す配合組成にて、実施例1及び2の顔料分散溶液を調製した。具体的には、表1に示す各材料及びジルコニアビーズを容器中に入れて混合し、分散機(ペイントシェーカー、浅田鉄工株式会社製)にて常温で16時間(分散時間)分散した。これにより、各実施例1及び2について、カーボンブラック顔料濃度が25質量%の顔料分散溶液をそれぞれ得た。
比較例1~3においては、吐出安定剤として、表3に示すものに変更した。それ以外は、前記実施例1と同様にして、比較例1~3の水性インク組成物をそれぞれ作成した。
各実施例及び比較例の水性インク組成物の吐出安定性として、ノズル抜け及び印刷画像のかすれの評価を行った。すなわち、記録媒体としてマット紙(商品名:スーパーファイン紙、エプソン(株)製)を用意し、各実施例及び比較例で調製した水性インク組成物を用いてそれぞれ印刷を行った。印刷は、インクジェットプリンタ(KC 600dpiヘッド搭載印字治具)を用いて、シングルパス(ワンパス)方式にて行った。
各実施例及び比較例の水性インク組成物の表面張力は、表面張力計(商品名;DY-500、協和界面科学(株)製)を用いて、常温下(25℃)で測定した。結果を前記表3に示す。
表3に示す実施例1、2の実験結果から分かる通り、HLBが15以上のカプリル酸デカグリセリルを、水性インク組成物の全質量に対し2質量%となる様に配合した場合、ノズル抜け及びかすれは何れも発生せず、良好な吐出安定性を示すことが確認された。
Claims (5)
- インクジェット記録に用いるインクジェット用水性インク組成物であって、
着色剤と、カプリル酸ポリグリセリルを主成分とする吐出安定剤とを少なくとも含み、
前記吐出安定剤のHLBが15以上であり、全質量に対し1質量%~5質量%の範囲で含み、
25℃における表面張力が25mN/m~40mN/mの範囲であるインクジェット用水性インク組成物。 - 前記着色剤が顔料としてのカーボンブラックであり、
さらに、顔料分散剤として、ポリオキシエチレン硬化ヒマシ油、ポリオキシエチレンアルキルエーテル、ポリソルベート、オレイン酸デカグリセリル及びポリアクリル酸ナトリウムからなる群より選ばれる少なくとも1種の界面活性剤を含む請求項1に記載のインクジェット用水性インク組成物。 - 前記ポリオキシエチレン硬化ヒマシ油のHLBが10以上である請求項2に記載のインクジェット用水性インク組成物。
- 可食性を有する請求項1~3の何れか1項に記載のインクジェット用水性インク組成物。
- インクジェット用水性インクの乾燥皮膜を表面に有する固体製剤であって、
前記インクジェット用水性インクが、請求項1~4の何れか1項に記載のインクジェット用水性インク組成物からなる固体製剤。
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JP2020070416A (ja) * | 2018-11-02 | 2020-05-07 | 株式会社Screenホールディングス | インクジェット用オーバーコート組成物及び印刷物 |
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