JP2006169301A - Edible inkjet ink composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an edible inkjet ink composition which is optimal for forming letters and images having good light resistance and good color balances in color mixed portions, when forming full color images on the surfaces of foods such as cakes, chocolates or gums, cosmetics, medicines, and quasi-drugs by a recording method using an inkjet printer. <P>SOLUTION: This edible inkjet ink composition comprises at least an edible colorant, a fatty acid ester, a water-soluble solvent, purified water and a silicone resin, wherein the edible colorant comprises a plurality of different colorants and one or more other additives to adjust color tone and ink physical properties. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an edible ink composition, and more particularly to an edible ink-jet ink composition that can be directly printed on foods, cosmetics, and pharmaceuticals.

  The printing technology using an ink jet printer is excellent for a small quantity and a wide variety of variable printing, and can perform printing without bringing the printer into contact with a printing target. For this reason, it is expected to be used in industrial applications and industrial applications, and ink development according to various applications is desired.

Edible ink is composed of only edible raw materials and is used because it can print the date of manufacture, expiration date, message, design, etc. on food, cosmetics and pharmaceuticals. However, when printing directly on a non-uniform or irregular surface using methods such as screen printing and flexographic printing, the food and base material will be damaged, resulting in good quality printing. However, inkjet printing can cope with a wide variety of small lots, and can perform printing without bringing the printer into contact with the printing target. So far, character printing by ink jet using edible ink and simple pattern printing have already been performed, but when forming a full color image, the method of forming an image with improved light resistance and color balance of the mixed color part is It was difficult and color reproduction was difficult. In order to form printed matter with good light resistance, Patent Publication No. 9-302294 states that it is possible to prevent and maintain discoloration and fading after dye printing by using an edible stabilizer, but the light resistance is improved. However, since the color fading rates of the respective colors are different, the color balance may be lost over time.
Patent Publication Number 9-302294

  When forming letters and full-color images on the surface of foods such as cakes, chocolates, gums, etc., cosmetics, pharmaceuticals, and non-pharmaceuticals by a recording method using an ink jet printer, the color balance in the mixed color part is good and light resistance Provided is an edible inkjet ink composition that is optimal for good character and image formation.

  It is an edible inkjet ink composition containing at least edible dyes, fatty acid esters, water-soluble solvents, purified water, and silicone resins, and the color tone and ink physical properties are adjusted by using a combination of a plurality of different dyes and other additives as edible dyes.

  The present invention can provide an edible ink-jet ink composition that is excellent in ejection stability, has a good balance of light resistance in each color ink, and can form an image with a well-balanced color balance.

  As a result of intensive studies, the present inventors have at least edible dyes, fatty acid esters, water-soluble solvents, purified water, and silicone resins, and adjusted the color tone and ink physical properties by using a combination of several different dyes and other additives as edible dyes. As a result, the present invention has been provided which is an edible ink-jet ink composition that can be stably ejected and can form an image with a well-balanced color balance.

  In order to adjust the color tone and ink physical properties of the edible ink-jet ink composition, edible pigment 0.5 to 7% by weight, fatty acid ester 0.1 to 5% by weight, water-soluble solvent 3 to 70% by weight, purified water 20 It is preferably prepared in the range of ˜80 wt% and silicon resin in the range of 0.01˜0.1 wt%.

  The black ink composition can be adjusted in color tone by using a combination of pigments, and is preferably prepared by combining at least two pigments from the red pigment, yellow pigment, and blue pigment of the pigment group according to claim 1. Are red, blue, yellow from red 40, red 102, red 106, yellow 4 or yellow 5 as yellow dye, blue 1 or blue 2 as blue dye It is preferable to adjust from the combination of these dyes.

  The red ink composition may be prepared from at least one selected from Red No. 2, Red No. 3, Red No. 40, Red No. 102, Red No. 104, Red No. 105, and Red No. 106, or two or more. preferable. It may be used in combination with Yellow No. 4 or Yellow No. 5 to adjust the color.

  The yellow ink composition may be adjusted with yellow No. 4 or yellow No. 5, or yellow No. 4 and yellow No. 5 may be mixed to adjust the color.

  The blue ink composition may be adjusted with Blue No. 1 or Blue No. 2, or the color may be adjusted by mixing Blue No. 1 and Blue No. 2.

  Fatty acid esters are effective in stabilizing solutions as surfactants and are generally sucrose oleate, sucrose acetate stearate, sucrose distearate, sucrose dilaurate, sucrose stearate, sucrose tristearate, sucrose tribehenate, palmitic acid Sucrose, sucrose polyoleate, sucrose polystearate, sucrose polypalm fatty acid, sucrose polylaurate, sucrose polylinoleate, sucrose myristate, sucrose coconut fatty acid, sucrose laurate, sucrose citrate, glyceryl citrate, glyceryl succinate , Glyceryl laurate, glyceryl acetate, glyceryl acetate fatty acid, glyceryl succinate, fatty acid glyceryl diacetyl tartrate Glyceryl succinate, glyceryl succinate, polyglyceryl laurate, polyglyceryl laurate, glycerides palmitate, polyglyceryl oleate, glycerides myristate, glycerides oleate, hydrogenated palm fatty acid glycerides, glycerides laurate, glycerides citrate, glycerides citrate, palm oil fatty acid propylene glycol And coconut oil fatty acid propylene glycol.

  Silicone resin is preferably used as an antifoaming agent and added in an amount of 0.01 to 0.05% for stable ejection. If it is not added, it is difficult for the bubbles to disappear, which causes discharge failure.

  In order for the edible inkjet ink composition to stably eject continuously, the viscosity should be 4 cps or less at 25 ° C., and the surface tension should be in the range of 20 to 38 dyne / cm 2. It is preferable that the surface tension is 22 to 35 dyne / cm.

  In order to improve the printability on the non-absorbing surface, the ink component may contain a polysaccharide, shellac, or the like as a binder component.

  Moreover, food additives such as anti-fading agents and preservatives may be included.

  Although the present invention is prepared using raw materials that are approved for use in the Food Sanitation Law, additives other than edible grade may be added depending on the application.

  The edible inkjet ink composition of the present invention can be printed on foods, pharmaceuticals, quasi-drugs, cosmetics, feed, containers and packaging that directly touch these. Examples of food include Japanese confectionery such as rice crackers, buns, and candy, cookies, biscuits, crackers, cakes, castella, chocolate, caramel, candy, chewing gum, bread and other Western confectionery, potato chips, snacks such as puff snacks, and ice cream Dairy products such as ice candy and sherbet, dairy products such as cheese, livestock meat products such as ham, sausage, bacon, and dry sausage, fish meat ham, fish sausage, seafood products such as salmon, chikuwa, bran, and dried fish Food. Examples of pharmaceuticals, quasi drugs, and cosmetics include tablets, capsules, troches, lipsticks, and foundations.

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto. An edible inkjet red ink was made by mixing the following ingredients.
After adding 0.2 part of glycerin fatty acid ester, 30 parts of glycerin and 0.01 part of silicone resin to 64.79 parts of purified water and stirring for 5 minutes to dissolve, add 4 parts of red No. 102 and 1 part of red No. 106 to completely dissolve. The mixture was stirred until it was prepared, and then filtered.

An edible inkjet black ink was made by mixing the following ingredients.
To 64.79 parts of purified water, 0.2 part of glycerin fatty acid ester, 30 parts of glycerin and 0.01 part of silicone resin were added and stirred for 5 minutes to dissolve, then 2.4 parts of red 102 and 0.1 part of red 106 , 1.0 part of yellow No. 4 and 1.5 part of blue No. 1 were added and stirred until completely dissolved, followed by filtration.

An edible inkjet yellow ink was made by mixing the following ingredients.
Add 66 parts of glycerin fatty acid ester, 28 parts of glycerin and 0.01 part of silicone resin to 66.79 parts of purified water, stir for 5 minutes and dissolve, then add 5 parts of yellow No. 4 and stir until completely dissolved And then filtered.

An edible inkjet blue ink was made by mixing the following ingredients.
Add 0.2 part of glycerin fatty acid ester, 28 parts of glycerin and 0.01 part of silicone resin to 67.79 parts of purified water, stir for 5 minutes and dissolve, then add 4 parts of blue No. 1 and stir until completely dissolved. Then, it was prepared by filtering.

An edible inkjet red ink was made by mixing the following ingredients.
Add 0.2 part of glycerin fatty acid ester, 30 parts of glycerin and 0.01 part of silicone resin to 65.79 parts of purified water, stir for 5 minutes and dissolve, then add 3 parts of red No. 104 and 1 part of red No. 106. It stirred until it melt | dissolved in, and it prepared by filtering after that.
(Comparative Example 1)

An edible inkjet red ink was made by mixing the following ingredients.
To 69.78 parts of purified water, 0.2 part of glycerin fatty acid ester, 25 parts of glycerin, 0.02 part of silicone resin was added and stirred for 5 minutes, then 5 parts of red No. 104 was added and stirred until completely dissolved. It prepared by filtering after that.
(Comparative Example 2)

An edible inkjet red ink was made by mixing the following ingredients.
Add 6 parts of propylene glycol, 10 parts of glycerin and 0.01 part of silicone resin to 69.99 parts of purified water, stir and dissolve for 5 minutes, then add 4 parts of red No. 102 and 1 part of red No. 106 until completely dissolved. It was prepared by stirring and then filtering.
(Comparative Example 3)

An edible inkjet red ink was made by mixing the following ingredients.
To 64.97 parts of purified water, add 15 parts of propylene glycol, 15 parts of glycerin and 0.01 part of a silicone resin. Stir for 5 minutes to dissolve, then add 4 parts of red 102, 1 part of red 106, and 0.02 part of xanthan gum. In addition, it was prepared by stirring until completely dissolved, and then filtering.

  Using the edible inkjet inks of Examples 1 to 5 and Comparative Examples 1 to 3 obtained in this way, printing is output by a printer having a piezo head, and the evaluation is based on ejection stability and light resistance at that time. Went.

  Viscosity was measured at 25 ° C. using a B-type viscometer for samples at the initial stage and one month after storage.

  The surface tension was measured using a surface tension meter (CBVP-A3, manufactured by Kyowa Interface Science Co., Ltd.) at 25 ° C. for the initial and one month after storage.

For light resistance, the printed matter was irradiated with a carbon arc light resistance tester for 8 hours, and visually compared with an unirradiated printed matter, and the fading rate of the ink was evaluated.
A: 10% or less, ○: 10% to 15%, Δ: 15-20%, x: 20% or more

  In Examples 1 to 5, which are edible ink-jet ink compositions, the balance of light resistance of each color is good, and the viscosity and surface tension are also stable over time, so that stable continuous ejection is possible and suitable for image formation. Although it was ink, Comparative Example 1 had poor light resistance, and Comparative Example 2 had a surface tension of 40.2 dyne / cm, resulting in ejection failure during continuous printing, a small dot diameter, and no density. In Comparative Example 3, the viscosity was high and ejection failure occurred.

  Therefore, it is an edible inkjet ink composition containing at least edible dyes, fatty acid esters, water-soluble solvents, purified water and silicone resins, and the color tone and ink physical properties are adjusted by using a combination of a plurality of different dyes and other additives as edible dyes. Therefore, it is possible to provide the present invention which is an edible inkjet ink composition having a stable and good color balance.

Claims (5)

  An edible ink-jet ink comprising at least an edible dye, a fatty acid ester, a water-soluble solvent, purified water, and a silicone resin, and the edible dye is red No. 2, red No. 3, red No. 40, red No. 102, and red No. 104. An edible inkjet ink composition comprising at least one selected from Red 105, Red 106, Yellow 4, Yellow 5, Blue 1 and Blue 2.   The edible inkjet ink composition according to claim 1, wherein the fatty acid ester comprises at least one or more selected from sorbitan acid fatty acid ester, sucrose fatty acid ester, glycerin fatty acid ester, and propylene glycol fatty acid ester.   The edible inkjet ink composition according to claim 1, wherein the water-soluble solvent comprises at least one selected from ethanol, propylene glycol, and glycerin.   The edible inkjet ink composition according to claim 1, wherein the viscosity is 4 cps or less at 25 ° C. and the surface tension is in the range of 20 to 38 dyne / cm 2.   The food color is 0.5-7% by weight, the fatty acid ester is 0.1-5% by weight, the water-soluble solvent is 3-70% by weight, the purified water is 20-80% by weight, and the silicone resin is 0%. The edible inkjet ink composition according to claim 1, comprising 0.01 to 0.1% by weight.