JP2002241660A - Ink composition containing allyl isothiocyanate and sheet for food packaging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an ink composition capable of making various objects exhibit antimicrobial, deodorizing and freshness retaining effects by printing the objects with the ink composition and a sheetlike body exhibiting antimicrobial, deodorizing and freshness retaining effects on foods. SOLUTION: This ink composition is obtained by adding allyl isothiocyanate extracted from Wasabia japonica, etc., to an ink composition. A transparent sheetlike body 1 for food packaging is partially printed with a printing ink 2 containing the ink composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink composition containing allyl isothiocyanate extracted from wasabi and the like, and a sheet for food packaging.

[0002]

2. Description of the Related Art It has been known that allyl isothiocyanate extracted from wasabi, red pepper or garlic has antibacterial, deodorant, and freshness preserving effects. Therefore, this allyl isothiocyanate has conventionally been included in foods such as candies, ice creams, and bakeries, and is mainly used to prevent spoilage of foods. Also,
Attempts have also been made to pack allyl isothiocyanate containing allyl isothiocyanate into a container to carry out antibacterial and deodorant effects in refrigerators, closets and automobiles, and to maintain the freshness of food in the refrigerator.

[0003] For this purpose, an isothiocyanate comprising a gel-like gel containing an allyl isothiocyanate extracted from wasabi and a volatile agent for volatilizing the allyl isothiocyanate is included. Although allyl acid inclusion agents have been proposed, this allyl isothiocyanate inclusion agent easily emits allyl isothiocyanate,
It can be widely used for antibacterial, deodorant, keeping freshness, etc., although it is effective for short term antibacterial, deodorizing, keeping freshness,
There is a problem that it is difficult to maintain the effect for a long time as a result of excessively promoting divergence. Further, a film or sheet (hereinafter, referred to as a sheet-like body) is mixed with synthetic resin and dried wasabi powder containing allyl isothiocyanate (so-called wasabi powder) to form a sheet. ing. By using these sheets for food packaging, antibacterial, deodorant,
Freshness can be maintained. However, by mixing the wasabi dried powder, the sheet is colored to a color close to white as a whole, has a poor appearance, and cannot be said to be suitable for food packaging.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above circumstances, and by printing on an appropriate object, various objects can be provided with antibacterial, deodorant, and freshness preserving effects. It is an object of the present invention to provide an ink composition that can be used. Another object of the present invention is to provide a sheet-like body which exhibits an antibacterial effect, a deodorant effect, and a freshness-maintaining effect on food, and has a good appearance even when the food is packaged.

[0005]

Means for Solving the Problems The first invention of the present application provides an ink composition characterized by adding allyl isothiocyanate extracted from wasabi or the like to the ink composition. The second invention of the present application provides an ink composition characterized by adding wasabi dried powder containing allyl isothiocyanate to the ink composition. A third invention of the present application is a sheet for food packaging, wherein a transparent sheet for food packaging is partially printed with the ink composition according to the first or second invention. I will provide a.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The allyl isothiocyanate used in the ink composition of the present invention is extracted from horseradish, pepper, or garlic, and can be composed of one or more selected from these. Among them, those extracted from wasabi have the strongest effects such as antibacterial, deodorant and freshness retention, and are preferable in this respect.

The allyl isothiocyanate is extracted from horseradish, but it is not always necessary to isolate only allyl isothiocyanate. The allyl isothiocyanate may be used in the form of dried wasabi powder in the form of wasabi powder. ,
A liquid containing allyl isothiocyanate from wasabi may be used.

The allyl isothiocyanate or horseradish powder can be used by being blended into a printing ink composition. As the printing ink, a composition of a conventional printing ink such as a top plate, a planographic plate, an ou plate, and a gravure plate can be used. The resin component of this ink may be added to a synthetic resin component such as a polyethylene-based or polypropylene-based resin to add various pigments as necessary, and may be colored in various colors. . In particular, when wasabi powder is used, since the wasabi powder has a color close to white, the wasabi powder becomes a pigment of the ink, and this color appears as the color of the ink.

The obtained ink containing allyl isothiocyanate or horseradish powder can be appropriately printed on a sheet by a conventional method. At this time, by using a sheet-like body such as a transparent sheet or film made of a synthetic resin as the sheet-like body, the transparency of the sheet is not lost, and further, effects such as antibacterial, deodorant, and freshness are exhibited. be able to. Also, a bag for packaging may be formed from the printed sheet-like body, or printing may be performed after the sheet is formed in a bag-like body in advance.

The sheet-like body will be described in more detail with reference to the drawings. FIG. 1 is a plan view of the sheet-like body, and FIG. 2 is a perspective view showing a usage form of the sheet-like body. The sheet-like body shown in FIG. 1 is a sheet-like body 1 made of a synthetic resin such as polyethylene or polypropylene, and in this example, the whole is transparent. At least one of the front surface and the back surface of the sheet 1 is partially printed by gravure printing with the printing ink 2 according to the present invention. In this example, printing ink 2
, The characters are printed, but in addition to the characters, figures,
There are no particular restrictions on the contents of printing such as symbols and patterns. The sheet 1 may be formed into a continuous long strip, or may be cut into an appropriate length or shape.

Next, the sheet 1 can be used for packaging foods and the like. FIG. 2 shows an example of the use form, which is used by arranging it on the food 4 packed in the lunch box 3 and using a lid such as a transparent cover (not shown). Is closed. In this example, allyl isothiocyanate is emitted from the printing ink 2 of the sheet 1 to the food 4, and the food 4 exhibits effects such as antibacterial, deodorant, antifungal and freshness preservation, and putrefaction and food poisoning. Etc. can be prevented. In particular, horseradish powder has a humidity of 60% or more and a temperature of 1%.
When the temperature is 5 ° C. or higher, it is said that allyl isothiocyanate is remarkably diffused. Therefore, by using such a lunch box sheet, deterioration of the food 4 in the lunch box 3 that tends to be hot and humid can be prevented. It can be more effectively prevented. In addition, the sheet-shaped body 1 may be arranged by directly contacting the surface on which the printing ink 2 is printed with the food 4, but without contact with the food 4, the inside of the lunch box 3 is closed. Allyl isothiocyanate released into food 4
Works effectively against The application area of the printing ink 2 can be changed as appropriate. However, when printing is performed on the entire surface, the contents of the lunch box 3 cannot be seen from the outside, so it is preferable that the content is within 80%, more preferably within 50%. In particular, when a company name or a trademark is partially printed and displayed with the printing ink 2, it is possible to prevent deterioration of the food 4 without deteriorating the commercial value of the lunch box by displaying the contents, and at the same time, obtain an advertising effect. . When wasabi powder is used, it is preferably from 0.5 to 15.0 g (more preferably from 5.0 to 10 g) per square meter of the sheet.
It is desirable to adjust the blending amount and the application area so that 0 g) of wasabi powder is coordinated. If this value is small, the antibacterial effect is not sufficient, and if it is too large, the wasabi odor becomes too strong. In particular, by setting the amount to 10 g or less, it can be used in a substantially odorless state (a state in which an object to be packaged such as food does not have an odor), which is very advantageous for food packaging.

In addition to the above-mentioned usage patterns, although not shown, it can also be used as a wrap sheet 1 for packaging fresh foods such as vegetables and various foods such as bread. In this case, it is desirable that the surface on which the printing ink 2 is applied be inside. Further, as described above, the sheet-like body 1
It is desirable to be transparent, but an opaque material may be used, and a metal foil or paper may be used in addition to a synthetic resin.

[0013] In addition to the above-mentioned printing ink components, other antibacterial agents and bactericides may be used in combination, and a surfactant, a preservative, a dye, a solvent and the like may be added for use. it can. Further, a volatile solvent such as alcohol such as ethanol, isopyroalcohol, and methanol may be used as a solvent for wasabi powder, or a volatile agent that does not function as a solvent may be used. In this case, the volatile solvent or the volatile agent promotes the emission of allyl isothiocyanate by blending cyclodextrin having a sustained release property and adjusting the blending ratio so as to promote the emission of allyl isothiocyanate. Can be adjusted.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below, but the present invention should not be understood as being limited to these embodiments.

The printing inks of the examples were prepared according to the following formulation in Table 1, and were partially printed on transparent films made of synthetic resin.

[0016]

[Table 1] Chlorinated polypropylene 15.0 parts by weight Chlorinated ethylene vinyl acetate 2.5 parts by weight Polyethylene wax 0.6 parts by weight Wasabi powder (5.0 g / sheet 1)
Square meter) 61.9 parts by weight of toluene

The printing mode is substantially the same as that shown in FIG. 1, and the printing area is about 10% of the entire sheet. With the sheet-shaped body of this example, various objects to be packaged shown in Table 2 were wrapped with the printed surface inward, and left to stand at room temperature, and changes with time were observed. At the same time, as a comparative example, the packaged product is wrapped with a commercially available food packaging wrap,
As a result of the same observation, it was confirmed that in the examples, the freshness of the food could be maintained for a long period of time as compared with the comparative example, and the spoilage and deterioration of the food could be prevented.

[0018]

[Table 2]

Table 3 shows the results of an antibacterial test performed on the sheet-like material of the example. This test is an antibacterial activity test by the Japan Food Research Laboratories (No. 2001121494). The number of growing colonies on a test plate after culturing was determined for 3 days for Staphylococcus aureus and Vibrio parahaemolyticus, and for 7 days for Black mold and Blue mold. It was measured and the antibacterial performance of the example was confirmed.

[0020]

[Table 3]

[0021]

According to the first and second aspects of the present invention, antibacterial, deodorant,
It is an object of the present invention to provide an ink composition capable of exhibiting the effect of maintaining freshness. Also,
The third invention of the present application is to provide a sheet-like body which exhibits effects of antibacterial, deodorant and freshness preservation of food, and has a good appearance even when the food is packaged.

[Brief description of the drawings]

FIG. 1 is a plan view of a sheet-like body according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a use form of the sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet-shaped body 2 Printing ink 3 Lunch box 4 Food

Claims (3)

[Claims] 1. An ink composition comprising an allyl isothiocyanate extracted from wasabi and the like. 2. An ink composition characterized by adding wasabi dried powder containing allyl isothiocyanate to the ink composition. 3. A food packaging sheet, wherein a transparent sheet for food packaging is partially printed with the ink composition according to claim 1 or 2.