JP2007177132A - Ink composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet ink for egg shell printing not requiring refining, etc., of a raw material, having slight bleeding, free from elution of color and permeation of color to albumen during boiled egg production and having high printing concentration. <P>SOLUTION: The present invention relates to an ink composition composed of (a) a squid ink pigment, (b) a nonaqueous solvent which is a food additive and (c) a dispersing agent selected from food additives, an inkjet ink, prepared so that the ink composition is suitable for inkjet printing, in which all components belong to any of food additive and foods, a method for printing to egg shell comprising carrying out printing by an inkjet system using the inkjet ink and an egg printed by the printing method. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ink for general food-related printing such as a food package, particularly an ink-jet ink composition suitable for marking on the surface of an eggshell, a marking method on the eggshell surface using the same, and an egg marked Is.

  In recent years, environmental problems have been screamed in many industrial fields. In particular, in the food-related field, there is an increasing demand for environmental support not only for food itself, but also for its manufacturing environment, distribution system, packaging, and quality assurance. Among the foods, eggs that are fresh food are required to clearly indicate the quality guarantee deadline, and the date of manufacture and the quality guarantee deadline are printed on the package, or the printed product is attached separately on paper. The method is taken.

  In a method in which the date of manufacture or the quality guarantee date is printed on the package, or a paper that has been printed on a separate sheet is attached, the egg 1 is once taken out of the package, such as a refrigerator in a general household. There is a problem that it becomes impossible to know the date of manufacture and the quality guarantee deadline for each piece, and printing of this information directly on the eggshell has begun.

  As a method for printing on the eggshell, an ink jet method that is fast, non-contact and does not break the eggshell is preferable, and as an ink, all components are water, food, food additives, food additives due to the nature of the application. It is an essential condition to have safety that can be evaluated as equivalent. Furthermore, it is preferable that the color does not elute during the production of the boiled egg or does not penetrate into the egg white.

  As an ink satisfying these conditions, for example, at least selected from iron chlorophyllin sodium purified, copper chlorophyllin sodium purified, or sodium chlorophyllin purified in JP 2000-191969, JP 2000-297239 A Inkjet inks containing one kind and water have been disclosed, but the production of these compositions took time and cost for purification, and the print density was not always satisfactory. Furthermore, since it is a solution-type ink, there is also a problem that bleeding is large on a porous surface such as an eggshell.

Japanese Patent Application Laid-Open No. 2003-321349 discloses food printing with an edible ink containing a squid ink pigment, but mentions a water-insoluble solvent as a specific ink composition and ink solvent. Not.
Japanese Patent Application Laid-Open No. 2005-097600 describes a method for producing a squid pigment having a fine particle diameter, and considering its effective use as a toner for copying machines, water-based inks, oil-based inks, hair dyes, and the like. Yes. However, there is no mention of prescriptions such as specific blending methods for these utilization methods of the squid ink pigment.

As described above, it is desired that ink-jet inks for eggshell printing should be free of purification of raw materials, have low bleeding, have no color loss under boiling conditions, and have high printing density. -ing
JP 2000-191969 A JP 2000-297239 A JP 2003-321349 A Japanese Patent Laid-Open No. 2005-097600

  The object of the present invention is to provide an ink-jet ink for eggshell printing that does not require purification of raw materials, has little bleeding, has no color elution during boiled egg production, does not penetrate into egg white, and has a high printing density. It is to provide.

  As a result of diligent research to solve the above problems, the present inventors have found that (a) a squid pigment that is a food additive, (b) a water-insoluble solvent that is a food additive, and (c) a food additive. It came to provide the ink composition characterized by using the selected dispersing agent as an essential component.

  In the ink of the present invention, all the constituents belong to either foods or food additives, and can be used in a high range in food-related fields such as inkjet printing on eggshells.

  That is, the present invention comprises: (a) an ink composition that is a food additive, and (b) a water-insoluble solvent that is a food additive, and the ink composition for ink jet printing. Inkjet ink characterized in that all the constituents adjusted to belong to either food additives or foodstuffs, and to eggshells characterized by printing by inkjet method using the inkjet ink The present invention relates to a printing method and an egg printed by the printing method.

  Solution-type inks have large bleeding on a porous surface such as an eggshell, and in order to improve this bleeding, the inventors have added an oil-soluble dye as a food additive in a water-soluble solvent as a food additive. We devised to prepare emulsified ink to make fine particles. However, as a result of continuous studies aimed at improving bleeding resistance and printing density more than emulsified inks, it was concluded that pigment-dispersed inks are most suitable for satisfying the above conditions, and the present invention was devised. It came to do.

The squid ink pigment which is a food additive of the component (a) of the present invention, (b)
An ink composition characterized by comprising a water-insoluble solvent that is a food additive as an essential component is an ink composition that is a food additive as a food additive as a component (a) and a food additive as a component (b) Dispersed in a water-insoluble solvent using one or more dispersants selected from the component (c) food additive, and all components are either food additives or foods. Inkjet inks that are prepared for use in printing related to foods such as eggshell printing, and can be used for both continuous and on-demand systems It is possible to prepare an ink.

The present invention is described in further detail below.
The Ikusumi pigment, which is a food additive of the ink composition (a) of the present invention, is a notification from the Director of the Department of Health and Welfare, Ministry of Health and Welfare No. 56 on May 23, 1996 "Regarding the indication of additives based on the Food Sanitation Law" Coloring agents listed in Attachment 3 “List of items generally used for food and drink as food and used as additives”.

  The squid pigment that is a food additive of the ink composition (a) of the present invention will be described in detail. It is a thing. It is the main pigment eumelanin. It is prescribed. In addition, it is preferable to use a crushed pigment that is a food additive of the component (a) that has been pulverized in advance in consideration of energy required for dispersion, and specifically, an average particle diameter of 5 μm or less is preferable. More preferably, the average particle size is 0.5 μm or less.

  It is preferable that the squid colorant which is a food additive of the ink composition (a) of the present invention is contained in a total amount of 0.5 to 25% by weight in the final ink, and 2 to 15% by weight in the final ink. It is particularly preferable that it is included in the range of. When the content is less than 0.5% by weight, the print density is insufficient, and when the content is more than 25% by weight, the ink viscosity becomes high, and printing cannot be performed with a normal inkjet printing apparatus. Problems such as reduced ink dispersion stability are likely to occur.

  The water-insoluble solvent that is a food additive of the ink composition (b) of the present invention is a liquid that can disperse the squid ink pigment that is a food additive of the ink composition (a) of the present invention. “Designated Additives” designated by the Minister of Labor after confirming safety and effectiveness, “Existing Additives”, “Natural Flavors” and “General Foods and Drinks” that have been approved for use as natural additives Of those belonging to any of the “additives”, there is no particular limitation as long as they are singly or in combination of two or more to meet the viscosity standards of the ink.

  The water-insoluble solvent, which is a food additive of the ink composition (b) of the present invention, will be specifically described.Hexane, cyclohexane, heptane, octane, nonane, decane, undecane, dodecane, tridecane, naphtha, liquid paraffin, etc. Can be mentioned. Also, hexane, cyclohexane, heptane, octane, nonane, decane, undecane, dodecane, tridecane, naphtha, liquid paraffin, and a mixture of two or more of tetradecane, pentadecane, hexadecane, heptadecane, and eicosane are compatible with the ink viscosity. A mixture of liquids such as liquid paraffin, undecane, dodecane, tridecane, naphtha, liquid paraffin, and high-boiling solvents such as tetradecane, pentadecane, hexadecane, heptadecane, and eicosane function as a moisturizer for ink. Therefore, it is preferable to add an appropriate amount of the low viscosity ink composition.

  The dispersant which is a food additive of the ink composition (c) of the present invention will be described in detail. Dispersant that is a food additive of the ink composition (c) of the present invention is a squid dye that is a food additive of the component (a) in a water-insoluble solvent component that is a food additive of the component (b). `` Designated additive '' specified by the Minister of Health, Labor and Welfare after confirming safety and effectiveness, and a product that has been used as a natural additive and has been confirmed It belongs to any one of “additive”, “natural flavor” and “general food and drink additive”, and one or two or more dispersants selected from these can be used in combination.

  The total amount of the dispersant, which is the food additive of the ink composition (c) of the present invention, is preferably 10 to 1000% by weight, more preferably 50%, based on the squid pigment that is the food additive of the component (a). -800% by weight. When the additive amount of the dispersant, which is a food additive, is 10% by weight or less, it becomes difficult to obtain a sufficiently dispersed state. When the additive amount exceeds 1000% by weight, the viscosity of the dispersion is remarkably increased, It becomes impossible to use.

  The dispersant which is a food additive of the ink composition (c) component of the present invention will be specifically described. Sorbitan trioleate, sorbitan sesquioleate, sorbitan monooleate, sorbitan monolaurate, sorbita monostearate, sorbitan tristearate Rate, sorbitan monopalmitate, sucrose behenate, sucrose stearate, sucrose stearate, sucrose palmitate, sucrose laurate, sucrose erucate, sucrose oleate, sucrose Sugar myristic acid ester, propylene glycol stearate, propylene glycol laurate, propylene glycol distearate, propylene glycol dioleate, propylene glycol dilaurate Stell, diisostearic acid propylene glycol ester, alginate propylene glycol ester, glycerine citrate fatty acid ester, glycerin diacetyl tartaric acid fatty acid ester, glycerin monoacetic acid ester, glycerin acetic acid fatty acid ester, glycerin diacetate ester, polyglycerin fatty acid ester, polyglycerin condensed ricinoleic acid Esters, stearyl monoglyceridyl citrate, succinic monoglyceride, triacetylated glycerin tartaric acid fatty acid ester (mixture), succinic monoglyceride, glycerol cross-linked starch, stearyl monoglyceridyl citrate, lecithin (egg yolk lecithin, plant lecithin, fractionated lecithin) , Stearoyl calcium lactate lecithin, enzyme-degraded lecithin, enzyme-treated lecithin ), Saponin (Quillaja extract, soybean saponin, tea seed saponin, Enju saponin, enzyme-treated soybean saponin, beet saponin, kiraya extract (type 1), kiraya extract (type 2)), bile powder, barley shell skin extract Products, plant sterols, sphingolipids, animal sterols, tomato glycolipids, yuccaform extracts and the like.

  The ink composition of the present invention is a mixture of a squid pigment that is a food additive of component (a), a water-insoluble solvent that is a food additive of component (b), and a dispersant that is a food additive of component (c). It is obtained by dispersing the squid pigment which is a food additive of the component (a) with a bead mill and / or a roll mill.

  The dispersant which is a food additive of the ink composition (c) of the present invention can also be used after being dissolved in a water-insoluble solvent which is a food additive of the component (b).

  In the ink composition of the present invention, if necessary, foods such as dl-α-tocopherol, d-α-tocopherol, (d-β-tocopherol, d-γ-tocopherol), mixed tocopherol, extracted tocopherol, guaiac fat, etc. Additives and foods such as edible oils can be added as solvent viscosity modifiers that are food additives of component (b).

  When the ink composition of the present invention is used in an inkjet application, it is necessary to prepare it in a property that matches the head performance. The properties vary from head to head, but in general, the viscosity is preferably 20 mPas or less, and more preferably 15 mPas or less. The viscosity can be adjusted with a water-insoluble solvent that is a food additive.

EXAMPLES Hereinafter, although an Example demonstrates this invention still in detail, this invention is not limited to these Examples. “Parts” in the text indicates parts by weight, and “%” is based on weight unless otherwise specified.

  (Example 1) 12.0 parts of squid pigment (Hodogaya Chemical Co., Ltd .: Black CF) as a food additive, 10.8 parts of lecithin (Showa Sangyo Co., Ltd .: Showa Lecithin L) as a dispersant, wet dispersion 1.6 parts of Sorgen 30 (Daiichi Kogyo Seiyaku Co., Ltd .: sorbitan fatty acid ester) as an agent and 76.0 parts of liquid paraffin (Matsumura Oil Research Co., Ltd .: Moresco White P-40) as a food additive. Prepared in a container with zircon beads with a particle size of 0.6 mmφ, dispersed for 15 hours in a paint shaker, and then added a mixed solvent of 1: 1 (weight ratio) of liquid paraffin and octane, which is a food additive, to add pigment content. Adjusted to 6% and mixed with a paint shaker for 30 minutes, then centrifuged at 6000 rpm for 10 minutes to obtain a Cellulose with a pore size of 1.00 μm. Mixed ester type membrane filter and filtered at (manufactured by Toyo Roshi Kaisha, Ltd.) to obtain an ink composition 1.

  (Example 2) The wetting and dispersing agent of Example 1 was changed to sucrose stearate ester (Daiichi Kogyo Seiyaku Co., Ltd .: DK Ester O-10), and filtration was performed on a glass filter with a pore size of 1.00 μm (manufactured by Toyo Roshi). : GA-100) was used, and an ink composition 2 was obtained in the same manner as in Example 1.

  (Example 3) 12.8 parts of squid ink pigment (Hodogaya Chemical Co., Ltd .: Black CF), a food additive, liquid paraffin (Matsumura Oil Research Institute: Moresco White P-40) 10 as a food additive 0.0 parts, 3.1 parts of sucrose stearate surfactant (Daiichi Kogyo Seiyaku: DK Ester O-10, HLB = 1) as a food additive, and lecithin (made by Showa Sangyo) as a food additive : Showa lecithin) A mixture of 23.6 parts was subjected to 10 passes with 3 rolls to prepare a pre-dispersion in which large particles of squid ink pigment were pulverized. To this, 58.0 parts of liquid paraffin (Matsumura Oil Research Institute: Moresco White P-40) as a food additive and 91.5 parts of octane as a food additive were added, and zirconia having a particle size of 0.3 mm. After being placed in a container with beads and dispersed for 8 hours in a paint shaker, the mixture was centrifuged at 6000 rpm for 10 minutes, and filtered through a cellulose mixed ester type membrane filter (Toyo Filter Paper: A100A090C) with a pore size of 1.00 μm. Ink composition 2 was obtained.

  Comparative Example 1 18.0 parts of Cu chlorophyll as a food additive (Nippon Chlorophyll: Chlorone GA), 4.5 parts of paprika pigment as a food additive (Riken Vitamin: Ricket Color Paprika 240R (G)), food 400 parts of octane as an additive and 140.0 parts of liquid paraffin as a food additive (manufactured by Matsumura Oil Research Institute: Moresco White P-40) are heated to 40 ° C. and dissolved, and then cellulose having a pore size of 1.00 μm The mixture was filtered through a mixed ester type membrane filter (manufactured by Toyo Filter Paper: A100A090C) to obtain an ink composition 3.

  For the ink compositions 1 to 3 prepared in Examples 1 to 3 and Comparative Example 1, an ink-jet printer is used to perform a print test on the eggs, and the blotting check is performed, and the eggs after printing are boiled, Ink elution in hot water and ink penetration into egg white were evaluated. The results are shown in Table 1.

As shown in Table 1, in Comparative Example 1, bleeding on the printing surface, elution of ink in hot water, and penetration of ink into egg white were observed. However, in Examples 1 and 2, no ink bleeding, elution or penetration was observed, and ink compositions 1 and 2 showed excellent printability.

Claims (7)

(a) a squid pigment, (b) a water-insoluble solvent as a food additive, and (c) a dispersant selected from food additives as essential ingredients, (a)
An ink composition obtained by dispersing a squid pigment in a water-insoluble solvent which is (b) a food additive with a dispersant selected from (c) the food additive.   (c) The dispersant used in dispersing in the water-insoluble solvent (b) food additive (b) is one or more surfactants selected from food additives. The ink composition according to claim 1, wherein:   The ink composition according to claim 1 or 2, wherein all of the components belong to either food additives or foods.   The ink composition according to any one of claims 1 to 3, wherein the ink composition is prepared by dispersing (a) a squid pigment in ink-jet printing in a water-insoluble solvent (b) as a food additive.   An ink composition for ink-jet printing, wherein the ink composition according to any one of claims 1 to 4 is prepared for ink-jet printing, and all the constituents belong to either food additives or foods. .   A printing method for eggshells, wherein printing is performed by an inkjet method using the ink composition for inkjet printing according to claim 5.   An egg printed by the printing method according to claim 6.