JPH06100046A - Partitioning material for food with antibacterial property - Google Patents

Abstract

PURPOSE:To assign antibacterial property and improve the keeping quality by a method wherein for a partitioning material of a packaging container for sushi, etc., an antibacterial agent for which isothiocyanic ester is enclosed by cyclodextrin is contained in a synthetic resin base material. CONSTITUTION:An antibacterial agent 2 is contained in a synthetic resin base material 3, and the synthetic resin base material 3 is punched into a shape of 'baran' or tree leaf by a press, etc., to form a partitioning material 1. For the antibacterial agent 2, a compound of which the antibacterial component is isothiocyanic ester, and which is enveloped by cyclodextrin is used. Also, as the synthetic resin base material 3, an expanded or non-expanded film or sheet of polystyrene, etc., is used. Also, a fragrance substance such as cinnamic acid, etc., can be blended in the antibacterial agent 2. Also, a pattern of 'baran', etc., may be printed on the synthetic resin base material 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is used as a partition material for partitioning food by placing it between foods of different kinds when storing several kinds of foods in a packaging container such as sushi, bento and sashimi. The present invention relates to a food partitioning material having antibacterial properties.

[0002]

BACKGROUND OF THE INVENTION Partitioning materials for foods are such that when foods such as sushi, bento, and sashimi are stored in a packaging container, different foods come into contact with each other and the color, flavor, etc. are altered. It is to partition each food so that it is not done. As this food partitioning material, for example, one having a decorative function such as balun, large leaf, maple and the like formed of synthetic resin is known.

Further, if the food stored in the packaging container is left to stand for several days, molds and bacteria grow. Therefore, isothiocyanate ester, which is known as a substance having an antibacterial effect, is used in order to prevent the generation of mold and the growth of bacteria in foods. This isothiocyanate is an extract component from wasabi root and mustard seeds, and is harmless to the human body, and thus is suitable as an antibacterial agent for food.

As a method of using the isothiocyanate ester to prevent the growth of fungi and suppress the growth of bacteria in foods, for example, JP-A-2-109962 and JP-A-3-224 are available.
Japanese Patent Laid-Open No. 437 proposes a method for preserving foods in which volatile gas of isothiocyanate ester is caused to exist during storage of foods to suppress the growth of mold and bacteria in the foods. Further, Japanese Utility Model Laid-Open No. 3-129083 proposes a freshness-keeping material for a refrigerator.
A gel-like substance or powder containing an isothiocyanate as an active ingredient is filled or held in a breathable package. By providing this refrigerator freshness-keeping material in the refrigerator, bacterial propagation is suppressed in the fresh food in the refrigerator by the isothiocyanate volatile gas.

However, with this freshness-keeping material for refrigerators, since the volatile gas of isothiocyanate does not reach the food stored in the hermetically sealed container, the antibacterial effect cannot be provided. In addition, Japanese Utility Model Laid-Open No. 3-112296 proposes an antibacterial pack material, and this antibacterial pack material is a cyclodextrin clathrate compound of isothiocyanates in a breathable and water-impervious bag. Is enclosed. Then, the antibacterial pack material is hermetically packaged together with the food, thereby suppressing the growth of bacteria adhered to the food.

[0006] However, in this antibacterial pack material, when several kinds of foods are used in a packaging container which is partitioned by a partition material and stored, a volatile gas of isothiocyanate which is gradually released from the pack material is partitioned. Blocked by material. For this reason, if it is partitioned by a partition material, it is sufficient for the food stored in the packaging container unless an antibacterial pack material is put in each partitioned partition to give an antibacterial effect to the food. Can not give an antibacterial effect.

Further, it is very troublesome to put the antibacterial pack material in each of the compartments partitioned by the partition material. Therefore, an object of the present invention is to provide a simple and sufficient antibacterial effect even when several kinds of foods are stored in a packaging container using a partitioning material, and foods having antibacterial properties capable of improving shelf life of foods. The purpose is to provide a partition material.

[0008]

In order to solve the above problems, an antibacterial food partitioning material of the present invention is a synthetic resin base for partitioning several kinds of foods contained in a sealed container. The material is characterized in that the synthetic resin of the base material contains an antibacterial agent in which isothiocyanate is included in cyclodextrin.

[0009]

According to the partitioning material for food having the antibacterial property of the present invention having the above-mentioned constitution, the antibacterial agent including the isothiocyanate ester in cyclodextrin is contained in the base material made of the synthetic resin. Isothiocyanic acid ester, which is a sex ingredient, is gradually released from cyclodextrin as a volatile gas. As a result, the volatile gas is gradually released from the food partitioning material that partitions several types of foods, and the volatile gas can be spread over the entire food product without being blocked by the partitioning material, and an antibacterial effect can be exhibited.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a partially cutaway plan view of a food partitioning material having an antibacterial property according to an embodiment of the present invention, and FIG. 2 shows a sectional view thereof. The partition material for food shown in FIG. 1 is a balun 1 in which one side of a synthetic resin substrate 3 is formed in a serrated shape 11. The balun 1 is formed by punching a green colored synthetic resin substrate 3 with a press or the like.

As shown in FIG. 2, the antibacterial agent 2 is contained in the synthetic resin substrate 3 forming the balun 1. As the antibacterial agent 2, a compound in which isothiocyanic acid ester which is an antibacterial component is included in cyclodextrin is used. As the synthetic resin substrate 3 containing the antibacterial agent 2, for example, a film or sheet made of a foamed or non-foamed resin such as polystyrene, polypropylene, polyethylene, polyvinyl chloride, polyvinyl alcohol or the like can be used. Polystyrene and polypropylene are preferably used.

As the above-mentioned isothiocyanate,
For example, allyl isothiocyanate, methyl isothiocyanate, ethyl isothiocyanate, n-isothiocyanate.
Propyl, isopropyl isothiocyanate, n-butyl isothiocyanate, isobutyl isothiocyanate, isoamyl isothiocyanate, phenyl isothiocyanate,
Benzyl isothiocyanate or the like is used, and among them, allyl isothiocyanate having an excellent antibacterial effect is preferably used. The isothiocyanic acid ester is volatilized to give an antibacterial effect such as antifungal and bacterial growth inhibition to foods. Further, isothiocyanates are usually liquid and oily and can be extracted from horseradish and mustard, but can also be industrially produced, for example,
An intermediate obtained by reacting an amine with carbon disulfide as shown in the following formula (1) can be produced by decomposing it with silver nitrate as shown in the following formula (2).

[0013]

[Chemical 1]

(In the formula, R represents a hydrocarbon group which may have a substituent.) Alternatively, it can be obtained by heat-treating a thiocyanate ester for isomerization. As the cyclodextrin, for example, α-cyclodextrin, β-cyclodextrin, γ-cyclodextrin and the like are used, and β-cyclodextrin is particularly preferably used. Cyclodextrin is usually in the form of powder, and it is possible to achieve sustained release, chemical stabilization, deodorization, oxidation prevention, photodegradation prevention, etc. of the volatile gas of the entrapped isothiocyanate ester. Thereby, by including the isothiocyanate in the cyclodextrin, the life of the isothiocyanate can be extended. Further, cyclodextrin can control the volatilization rate and volatilization concentration of isothiocyanate ester depending on its type, and can keep the gas concentration of isothiocyanate ester constant over a long period of time. Furthermore, cyclodextrin can stably supply the volatile gas of isothiocyanate ester without being affected by the ambient temperature in the container. This cyclodextrin is obtained from a mixture of various degrees of decomposition products (molecules and micelles) obtained during the disintegration process of starch micelles that occur in the middle of the reaction when starch is hydrolyzed with acid or amylase.

The antibacterial agent 2 in which isothiocyanic acid ester is included in the cyclodextrin is obtained by kneading the powdery cyclodextrin and the liquid isothiocyanate ester by a conventional method using a Henschel mixer, a dry blender or the like. Can be obtained at. The content ratio of the antibacterial agent 2 to the synthetic resin substrate 3 can be appropriately set according to the volume of the container to which the antibacterial agent 2 is applied, the weight of the food, and the like.
0.5-15 parts by weight, preferably 1-1
It is contained in a proportion of 0 parts by weight. If this proportion is less than 0.5 parts by weight, the duration of the antibacterial effect is shortened, and conversely if it is more than 15 parts by weight, it may be difficult to form the base material of the film or sheet.

Most of the isothiocyanate ester has an odor, so that it changes or eliminates the odor, so that an aromatic substance can be mixed in the antibacterial agent 2. As the aromatic substance, for example, aromatic substances added to foods such as cinnamic acid, vanillin, geranyl acetate, pepper oil, and ethyl acetate can be used. Next, FIG. 3 shows a usage state of the food partitioning material having the antibacterial property of the above-mentioned embodiment. As a usage state of the balun 1, three kinds of different foods A stored in the packaging container 4,
The foods A, B, and C are arranged so that the foods B and C do not come into contact with each other. Further, a polyvinylidene chloride film 5 (for example, a product name “Saran Wrap” manufactured by Asahi Kasei Co., Ltd.) is covered on the upper portion of the packaging container 4 and the inside thereof is sealed.

As described above, according to the balun 1 as the partitioning material for food of the above-mentioned embodiment, the volatile gas of the isothiocyanate ester as the antibacterial component is gradually released from the balun 1. The balun 1 can exert an antibacterial effect by spreading the volatile gas over the foods A, B, C stored in the packaging container 4. In addition, this packaging container 4
Since the inside is sealed with a film 5 made of polyvinylidene chloride, the atmosphere of the packaging container 4 is filled with the volatile gas of the isothiocyanate ester gradually released from the balun 1.

Therefore, it is possible to easily prevent the generation of mold and bacterial growth in the foods A, B, and C stored in the container 4 for a long period of time, and improve the shelf life of the foods A, B, and C. You can The partitioning material for foods having antibacterial properties according to the present invention is not limited to the above-mentioned embodiment, and may be, for example, a leaf shape such as a large leaf or a maple, or another shape other than the balun 1. Further, as shown in FIG. 4, other patterns such as a balun and a leaf pattern are printed, such as a large leaf pattern printed on the synthetic resin substrate 3 forming the food partitioning material 1a. Anything is fine. Further, the synthetic resin base material 3 forming the partition material for food may have a myriad of fine pores in order to promote the sustained release of the isothiocyanate ester. For example, various designs are possible within the scope of the invention. It is possible to make changes.

[0019]

As described above, according to the food partitioning material having antibacterial properties of the present invention, the synthetic resin base material contains the antibacterial agent in which isothiocyanate ester is included in cyclodextrin. The isothiocyanate as an antibacterial component is gradually released as a volatile gas. As a result, the volatile gas can be spread over the entire food product without being blocked by the partition material, and an antibacterial effect can be exerted.

Therefore, even when several kinds of food are stored in a sealed container, the antibacterial effect can be easily and sufficiently exerted, mold and bacterial growth of the food can be prevented for a long time, and the shelf life of the food can be improved. You get what you can.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view showing an antibacterial food partitioning material according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the food partition material of FIG.

FIG. 3 is a cross-sectional view showing a usage state of the food partitioning member of FIG. 1.

FIG. 4 is a partially cutaway plan view showing a food partitioning material having antibacterial properties according to another example of the present invention.

[Explanation of symbols]

 A, B, C Food 1 Balun (Food partitioning material) 1a Food partitioning material 2 Antibacterial agent 3 Synthetic resin base material

Claims (3)

[Claims] 1. A synthetic resin base material for partitioning several kinds of foods contained in a hermetically sealed container, wherein an isothiocyanate ester is clathrated with cyclodextrin in the synthetic resin base material. A food partitioning material having antibacterial properties, characterized by containing an agent. 2. The partition material for food having antibacterial properties according to claim 1, wherein the synthetic resin base material is formed into a shape such as a balun or a tree leaf. 3. The antibacterial food partitioning material according to claim 1, wherein a pattern such as balun or leaves is printed on the synthetic resin substrate.