Water-based ink or stamp pad and vermilion ink

Abstract

To provide a water-based ink that can inactivate a virus adhering to a skin water-based ink even when the virus adheres to the water-based ink through the skin water-based ink.SOLUTION: Provided are: a water-based ink that comprises at least a dye, water, and a polyhydric alcohol, and is characterized by containing potassium oleate; preferably, the water-based ink is a skin ink; more preferably, a water-based ink stamp pad or vermilion pad that comprises a stamp ink pad body 3 impregnated with the water-based ink and a container whose top is open, and in which, characterized, the stamp ink pad body is accommodated in the container; and a water-based ink stamp pad or vermilion pad that is characterized in that the material forming the surface of the stamp ink pad body is a fiber.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to aqueous ink, and particularly to aqueous ink for skin that is used by applying the aqueous ink to fingers, or a stamp stand or vermilion ink provided with an ink pad impregnated with the aqueous ink and the aqueous ink for skin.

Background Art

[0002] In order to prevent infectious diseases such as novel coronavirus, norovirus, and influenza, and food poisoning, the Ministry of Health, Labour and Welfare recommends thorough handwashing with soap. Also, according to the correct handwashing test results (Infection Prevention Countermeasure Information Research Site), the 723 bacteria attached before handwashing decreased to 98 after 30 seconds of handwashing, and according to major soap manufacturers, in order to promote children's handwashing, they recommend handwashing with soap for about 30 seconds, such as preparing an original "handwashing song". In recent years, for example, in JP-A-2018-159041, there is disclosed an aqueous ink for skin that can be mainly used for children's handwashing practice, in which the aqueous ink is marked as an index on the palm using a seal or the like and washed off with commercially available soap in about 30 seconds.

[0003] However, when the above-mentioned aqueous ink for skin is used by an unspecified number of people, if the virus adheres to at least one finger of a user, the virus may be transmitted to the fingers of other users through the aqueous ink for skin. Therefore, from a hygienic perspective, products containing the aqueous ink for skin could not be targeted at an unspecified number of people.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention has been made to solve the above problems, and is an aqueous ink that can be easily washed off by soap in about 30 seconds when attached to human skin. The stamp pad or vermilion inkpad impregnated with Even if a virus adheres to the above-mentioned The stamp pad or vermilion inkpad due to the use by an unspecified large number of people, the attached virus can be inactivated. The stamp pad and vermilion inkpad It aims to provide such.

Means for Solving the Problems

[0008] This made to solve the above problems The invention is A printing pad body in which the material forming the surface is a fiber, and a container with an open top, wherein the printing pad body is housed in the container a stamp pad or vermilion ink for aqueous ink, At least impregnated with an aqueous ink containing a colorant, water, a polyhydric alcohol, and potassium oleate which is characterized by the above, and is a stamp pad or vermilion ink for aqueous ink.

Effects of the Invention

[0009] As a result of intensive research, the inventor of the present application has found an aqueous dye ink used in stationery such as marking pens, signature pens, ballpoint pens, stamp pads, and penetration marks that solves the above problems. That is, if an aqueous ink composed of at least a dye, water, a polyhydric alcohol, and potassium oleate is used, it can not only be used for conventional purposes such as writing and stamping, but also when marking the palm with a mark or the like as an index, it can be washed off in about 30 seconds using a commercially available soap, so it can be used for handwashing practice, handwashing encouragement, etc. Furthermore, when used for handwashing practice and handwashing encouragement using a stamp pad or a penetration mark, if a virus adheres to the surface of the stamp pad or the printing surface of the penetration mark through the fingers of the user, the potassium oleate can inactivate the virus, so that the activated virus does not adhere to the fingers of other users. In addition, the inventor of the present application has found that when the aqueous dye ink is used, the penetration into the stamp pad or the surface of the stamp pad of the vermilion ink is promoted, and the color tone on the surface side of the stamp pad impregnated with the aqueous dye ink can be made clear. As a result, it is possible to shorten the working time when impregnating the aqueous dye ink of the present application into the stamp pad or vermilion ink, and to improve the appearance of the finished product.

Brief Description of Drawings

[0010]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0011] Hereinafter, the present invention will be described in detail. [Colorant] As the colorant used in the present invention, as a dye, a food coloring and / or a natural pigment is used. Food Red No. 2 (C.I. Number: C.I. 16185, Color Index Name: Acid Red 27), Food Red No. 3 (C.I. Number: C.I. 45430, Color Index Name: Acid Red 51), Food Red No. 40 (C.I. Number: C.I. 16035, Color Index Name: Food Red 17), Food Red No. 102 (C.I. Number: C.I. 16255, Color Index Name: Acid Red 18), Food Red No. 104 (C.I. Number: C.I. 45410, Color Index Name: Acid Red 92), Food Red No. 105 (C.I. Number: C.I. 45440, Color Index Name: Acid Red 94), Food Red No. 106 (C.I. Number: C.I. 45100, Color Index Name: Acid Red 52), Food Yellow No. 4 (C.I. Number: C.I. 19140, Color Index Name: Acid Yellow 23), Food Yellow No. 5 (C.I. Number: C.I. 15985, Color Index Name: Food Yellow 3), Food Green No. 3 (C.I. Number: C.I. 42053, Color Index Name: Food Green 3), Food Blue No. 1 (C.I. Number: C.I. 42090, Color Index Name: Food Blue 2), Food Blue No. 2 (C.I. Number: C.I.Edible dye pigments such as 73015, Color Index Name: Acid Blue 74), and natural pigments such as Monascus Color, beta-Carotene, Laccaic Acid, Cochineal Extract, Paprika Oleoresin, Beet Red, Anthocyanins, Gardenia Extract, Carthamus Extract, Turmeric Oleoresin, Annatto Extracts, Chlorophylls, Japanese Persimmon Color, Tamarind Color, Caramel, etc. can be used. Other dyes that can be used are as follows. Examples of direct dyes include C.I. Direct Black 17, 19, 22, 31, 32, 38, 51, 62, 71, 74, 112, 113, 154, 168, C.I. Direct Yellow 4, 8, 11, 12, 26, 27, 28, 33, 39, 44, 50, 58, 85, 86, 87, 88, 89, 98, 100, 110, C.I. Direct Red 1, 2, 4, 9, 11, 20, 23, 24, 31, 37, 39, 46, 62, 75, 79, 80, 81, 83, 89, 95, 197, 201, 218, 220, 224, 225, 226, 227, 228, 230, C.I. Direct Blue 1, 15, 22, 25, 41, 71, 76, 77, 80, 86, 90, 98, 106, 108, 199, 120, 158, 163, 168, 199, 226, etc. Examples of acid dyes include C.I. Acid Black 1, 2, 24, 26, 31, 48, 51, 52, 107, 109, 110, 115, 119, 154, 156, C.I. Acid Yellow 1, 3, 7, 11, 17, 23, 25, 29, 36, 38, 40, 42, 44, 49, 61, 72, 78, 110, 135, 127, 141, 142, C.I. Acid Red 6, 8, 9, 13, 14, 18, 26, 27, 32, 35, 37, 42, 51, 52, 57, 80, 82, 83, 87, 89, 92, 94, 106, 111, 114, 115, 129, 131, 133, 134, 138, 145, 158, 186, 198, 249, 254, 265, 276, 289, C.I. Acid Violet 15, 17, C.I. Acid Blue 1, 7, 9, 15, 22, 23, 25, 29, 40, 41, 43, 59, 62, 74, 78, 80, 83, 90, 93, 100, 102, 103, 104, 112, 113, 117, 127, 138, 158, 161, C.I. Acid Green 3, 9, 16, 25, 27, etc. Examples of basic dyes include C.I. Basic Red 1, 2, 9, 12, 13, 38, 39, 92, C.I. Basic Blue 1, 3, 7, 5, 9, 19, 24, 25, 26, 28, 45, 54, 65, C.I. Basic Black 2, 8, etc.

[0012] In addition, pigments can also be used as the colorant in the present invention. Examples of pigments include organic pigments such as condensed azo, isoindolinone, quinacridone, diketopyrrolopyrrole, anthraquinone, dioxazine, phthalocyanine, and thioindigo; inorganic pigments such as carbon black, titanium oxide, and iron oxide; pearlescent pigments in which mica or glass is coated with titanium oxide or iron oxide; metal pigments such as aluminum powder and brass powder; and others such as fluorescent pigments, fluorescent brighteners, phosphorescent agents, luminous agents, thermochromic dyes, and metallic flakes. These pigments are usually kneaded into known resin dispersants such as acrylic resins such as polyacrylic acid, polymethacrylic acid, and styrene-acrylic acid copolymers, metal salts, ammonium salts, and amine salts of the acrylic resins, polyvinyl butyral resin, gum rosin, rosin-modified maleic acid resin, rosin-modified phenol resin, phenol resin, ketone resin, alkyd resin, shellac, xylene resin, coumarone resin, nitrocellulose, and ethyl cellulose to form processed pigments, which are convenient because they are easily dispersed when mixed with a solvent. Also, commercially available processed pigments in which the pigment has already been kneaded into the resin may be used. For example, Microlith White 0022 WA, Microlis Black 0066 WA, Microlith Yelow 1550WA, Microlith Yelow 2040 WA, Microlith Brown 3001 WA, Microlith Scarlet 3430 WA, Microlith Red 3630 WA, Microlith Red 4035 WA, Microlith blue 7080 WA, Microlith Yellow 3G-WA, Microlith Yellow BAW-WA, Microlith Yellow 2R-WA, Microlith Yellow 3R-WA, Microlith Brown 5R-WA, Microlith Scarlet R-WA, Microlith DPP Red B-WA, Microlith Red B-WA, Microlith Red B-WA, Microlith red RL-WA, Microlith Blue 4G-WA, Microlith R-WA, Microlith Black C-WA, Microlith White0022 A, Microlis Black 0066 A, Microlith Yelow 1040A, Microlith Yelow 1550 A, Microlith Brown 3001 A, Microlith Scarlet 3430 A, Microlith Red 3785 A, Microlith Blue 7080 A, Microlith White 0022 K, Microlis Black 0066 K, Microlith Yelow 1040K, Microlith Yelow 1061K, Microlith Yellow 2040 K, Microlith Brown 3001K, Microlith Scarlet 3430K, Microlith Red 3630 K, Microlith Scarlet 3430K, Microlith Red 3890K, Microlith Magenta 4535K, Microlith Violet 5700K, Microlith 6480K, Microlith blue 7080K, Microlith Green 8750K, Microlis Black 0066 T, Microlith Yelow 2040T, Microlith Brown 3001 T, Microlith Red 3890 T, Microlith Blue 7080 T, Microlith 8750T (the above are processed pigments manufactured by BASF Japan Ltd.) etc. can also be used. One or more of the above coloring agents can be used, and the blending amount is preferably 0.1 to 20% by weight, more preferably 0.5 to 10% by weight based on the total amount of the ink.

[0013] [Water and polyhydric alcohol] The solvent used in the present invention is a mixed solvent composed of water and polyhydric alcohol. Water such as pure water, distilled water, purified water, tap water, etc. is used. Purified distilled water is preferably used from the viewpoints of preventing decay and mold growth. Water can be used in an amount of 9 to 90% by weight based on the total amount of the ink. Polyhydric alcohols can be used, considering volatility, dye solubility, bleeding prevention properties, etc., such as ethylene glycol, propylene glycol, butylene glycol, pentyl glycol, hexyl glycol, diethylene glycol, triethylene glycol, dipropylene glycol, tripropylene glycol, glycerin, diethanolamine, triethanolamine, etc. Any of these can be used alone or in combination. Polyhydric alcohols can be used in an amount of 9 to 90% by weight based on the total amount of the ink.

[0014] [Potassium oleate] In addition, the addition of potassium oleate is essential in the present invention. Potassium oleate is represented by the following general formula (1), and is a potassium salt (higher fatty acid alkali metal salt) of oleic acid which is a higher fatty acid having 18 carbon atoms in terms of chemical structure, and is an anionic surfactant (anionic surfactant) classified as a soap. Potassium oleate can be used in an amount of 0.1 to 10% by weight based on the total amount of the ink. If the amount of potassium oleate used is less than 0.1% by weight, the effect of inactivating the virus will not occur. Also, if it is more than 10% by weight, the ink will gel and cannot be commercialized. The aqueous ink added with potassium oleate has been confirmed to have the effect of inactivating influenza virus and novel coronavirus. Also, the ink added with potassium oleate has a reduced surface tension, which speeds up the dripping and penetration time of the aqueous ink into porous materials derived from carbon such as cotton cloth, felt, rubber sponge, and urethane sponge, and shortens the time required for assembling product groups (stamp pads, red ink pads, writing utensils, stamping tools) equipped with the porous material as an ink pad. Furthermore, when the ink added with potassium oleate is dripped and penetrated into the porous material, the surface of the porous material after ink impregnation has no color unevenness and the ink color is uniform. This is considered to be due to the promotion of ink diffusion after ink dripping by the reduction of the surface tension of the aqueous ink, and it has a particularly remarkable effect on fiber materials. General formula (1) TIFF0007679069000001.tif61102

[0015] [Container] The aqueous ink in the present invention can be used by kneading it into the printing material for penetration printing, the felt of writing utensils, the ink pad of a stamp pad or red ink pad, or the container material. However, when commercializing it for an unspecified number of users, it is assumed to be used by impregnating the ink pad of a stamp pad or red ink pad. Figure 1 shows an example of using the aqueous ink of the present invention for a red ink pad. As shown in Figure 1, in the present invention, the downward direction in the front view is defined as the lower side, the upward direction as the upper side (the side of the board surface), the right direction as the right side, and the left direction as the left side. The red ink pad container 1 in Figure 1 consists of a substantially circular plate-shaped bottom surface portion 4 and a wall surface portion 2 that extends vertically upward so as to surround the outer edge of the circular plate-shaped bottom. However, the shape of the bottom surface portion 4 of the red ink pad container 1 is not limited to a round plate shape, and various forms such as a square, rectangle, and polygonal shape are conceivable. Also, the bottom surface portion 4 does not necessarily have to be plate-shaped, and ribs may be provided on the bottom surface portion 4, or it may have a corrugated shape. Further, the container may be configured to have a fitting portion and be fitted with a lid (not shown).

[0016] [Ink pad] The ink pad body 3 is accommodated in the inner space portion of the cinnabar container 1 formed by the bottom surface portion 4 and the wall surface portion 2. The ink pad body referred to in the present invention means a pad that stores cinnabar liquid or various inks, such as a pad for cinnabar or a pad for stamps. The ink pad body 3 accommodated in the case 2 has a two-layer structure of an ink-impregnated body having continuous pores and a surface fabric. In the embodiment of the present invention, felt is used for the ink-impregnated body and cotton cloth is used for the surface fabric, but it is not necessarily required to have a two-layer structure, and it can take any structure of a single layer or multiple layers. The material forming the surface of the ink pad body is preferably natural fiber such as cotton cloth or silk cloth, and synthetic fiber made of thermoplastic resin such as polyphenylene sulfide, polyetherimide, polyethersulfone, polysulfone, polyphenylene ether, polyester, polyarylate, polyamide, polyamideimide, polycarbonate, polyolefin, and polyetheretherketone, or thermoplastic resin copolymerized with these. Further, the fiber may be either a woven fabric or a non-woven fabric.

[0017] Furthermore, an antiseptic and antifungal agent, a stabilizer, a viscosity modifier, a surfactant, a pH adjuster, a fragrance, etc. may be appropriately blended in the present invention. Also, each of the above materials may be of general industrial grade, but considering use on human skin, it is preferable to use food additive grade from the viewpoint of safety.

[0018] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited by these examples. The aqueous ink for skin of the present invention is prepared by adding a dye, potassium oleate, and various additives as required into a solvent composed of water and polyhydric alcohol, and stirring.

Examples

[0019] The ink formulations for penetration printing of Examples 1 to 3 and Comparative Example 1 are shown in Table 1. TIFF0007679069000002.tif65127 The above penetration printing ink was used for the name 9 (ink-impregnated body: NBR porous) manufactured by Shachihata Inc.

[0020] The inks for vermilion printing of Examples 4 to 7 and Comparative Examples 2 to 3 are shown in Table 2. TIFF0007679069000003.tif65127 The vermilion printing ink was used on the vermilion (Eco) No. 30 manufactured by Shachihata Inc. (the ink-impregnated surface fabric: double weave of cotton fabric material).

[0021] The inks for stamp pads of Examples 8 to 11 and Comparative Examples 4 to 5 are shown in Table 3. TIFF0007679069000004.tif68127 The stamp pad ink was used on the medium-sized stamp pad manufactured by Shachihata Inc. (the ink-impregnated surface fabric: polyester-based synthetic fiber).

[0022] Also, for the examples and comparative examples, the results when tests were conducted under the following conditions are shown in each table. Virus residual confirmation test (Test method) The novel coronavirus (virus strain: JPN / TY / WK-521) and aqueous potassium oleate ink were reacted for 3 minutes at a ratio of 1:9, and the infectious titer was determined by the TCID50 method. The TCID50 method is one of the measurement methods used to confirm the virus infectious titer. A virus dilution solution is inoculated onto test tubes or well plates where cells have been cultured and adhered in advance, and it refers to the concentration that infects 50% of the cells. 〇: High residual infectious titer (greater than 1.0E+04) ×: Low residual infectious titer (1.0E+04 or less) Handwashing removability test (Test method) Using the penetration marks, vermilion, and stamp pads impregnated with the inks of the examples and comparative examples, after leaving them on the fingers for 1 minute, the state of the adhered ink was confirmed after handwashing with a commercially available soap (Bio Rex U Foam Hand Soap: manufactured by Kao Corporation) for 30 seconds. (Result confirmation method) ○: The adhered ink disappears. ×: The adhered ink remains. Ink penetration test (Test method) For the penetration marks, vermilion, and ink-impregnated bodies provided on the stamp base of the examples and comparative examples, one drop (about 30 mg) of ink is dropped, and the penetration time is confirmed. (Result confirmation method) 〇: Fast penetration time (within 30 seconds) ×: Slow penetration time (more than 30 seconds) Ink-impregnated body disk surface evaluation test (Test method) Check the color unevenness of the vermilion and the ink-impregnated body disk surface provided on the stamp base of the examples and comparative examples. Note that the side of the ink-impregnated body disk surface used for the vermilion is a double weave of cotton cloth material (120×120 count), and the side of the ink-impregnated body disk surface used for the stamp base is made of polyester-based synthetic fiber. (Result confirmation method) 〇: Uniform color shade ×: Large color unevenness

[0023] As is clear from Tables 1 to 3, the ink in this example obtained good results in various tests. Also, the aqueous ink in the comparative example was confirmed to have non-good results in the virus residue confirmation test and the ink penetration test. Furthermore, in the ink-impregnated body disk surface evaluation test, the best results were obtained in the vermilion using a double weave of cotton cloth material, which is a fabric, as the surface fabric of the printing pad, and the stamp base using polyester-based synthetic fiber. Figure 1 shows the results of the ink-impregnated body disk surface evaluation test of the example when tested with vermilion. On the other hand, Figure 2 shows the results of the ink-impregnated body disk surface evaluation test of the example when tested with vermilion. In the example, as shown in Figure 1, there was no color unevenness and a clear color was shown, while in Figure 2, color unevenness occurred and non-good results were obtained.

[0024] The present invention has been described above in connection with the most practical and preferred embodiments at the present time. However, the present invention is not limited to the embodiments disclosed in the present specification, and can be appropriately modified within the scope not contrary to the gist or idea of the invention that can be read from the claims and the entire specification. Skin aqueous inks involving such modifications should also be understood to be included within the technical scope.

[0025] 1 Red ink container 2 Wall surface part 3 Printing pad body 4 Bottom surface part

Claims

[Claim 1] An ink pad or vermilion ink for water-based ink comprising an ink pad whose surface is formed of a fiber material and a container open at the top, said ink pad being contained within said container, characterized in that said ink pad or vermilion ink for water-based ink is impregnated with water-based ink containing at least a colorant, water, a polyhydric alcohol, and potassium oleate.

Images