JPH08116940A - Preservation of food using leaf or beefsteak plant - Google Patents

Abstract

PURPOSE: To prevent the green color of a leaf of a beefsteak plant (Perilla frutescens Britton varacuta kulo) from discoloring and fading even in exposure to light by displaying for sale, etc., and enable the preservation for a long period without deteriorating the color tone or flavor by keeping the leaf of the beefsteak plant or a food using the leaf of the beefsteak plant in an oxygen free state. CONSTITUTION: A leaf of a beefsteak plant or a food using the lead thereof and a disoxidizer are enclosed in a substantially air-impermeable and transparent packaging material and hermetically sealed therein. An iron powder-based disoxidizer having a high oxygen absorption rate is preferred and usually enclosed as a disoxidizer package packaged in an air-permeable material. Even when the leaf and food are displayed in a state thereof exposed to light of the sunshine, a fluorescent lamp, etc., to visualize the contents, the discoloration and fading of the leaf of the beefsteak plant and deterioration in flavor thereof are not caused for a along period.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preserving foods using perilla leaves. More specifically, it relates to a method for preserving perilla leaves or foods using perilla leaves for the purpose of preventing discoloration / discoloration of perilla leaves and deterioration of flavor due to light.

[0002]

2. Description of the Related Art Although many foods are affected by light rays to be chemically deteriorated and their quality is deteriorated, green vegetables often lose their green color tone when exposed to light. Above all, perilla leaves are extremely susceptible to discoloration and fading due to light, causing a significant deterioration in flavor as the color tone changes. Such color change and flavor deterioration of perilla leaves occur more rapidly when the water content is high. Therefore, when foods using perilla leaves are displayed in an open showcase for sale and exposed to light, the water content of perilla leaves increases, especially in the case of high-moisture foods, and The leaves discolor and discolor rapidly to deteriorate the flavor, and even if the food itself can be tasted, it loses its commercial value within a short time.

In order to prevent the deterioration of food quality due to such light, it is usually effective to shield the light, and for products which are easily deteriorated by light, packaging materials such as metal vapor-deposited film and paper which do not transmit light rays, and colored products. It is wrapped with packaging materials. However, in general, it is often desired to use a transparent packaging material whose contents are visible in packaging foods. In particular, in packaging of foods using perilla leaves whose vivid colors are for sale, it is particularly important to use a transparent packaging material so that the contents can be seen. Therefore, it is not preferable to shield the food using perilla leaves from light with an opaque packaging material, and there is no suitable storage packaging method for display sale.

[0004]

As described above, foods that use perilla leaves are a packaging material that has a light-shielding effect due to the nature of the product, even though the perilla leaves are easily affected by light and deteriorate. There is a problem that use is not preferable. The object of the present invention is to solve the above problems and to use a transparent packaging material whose contents are easily visible in the packaging of foods using perilla leaves.
Even if it is sold for sale and exposed to light, the green color of the perilla leaves does not easily change or fade and the color tone and flavor are not impaired. Provide a storage method.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that if perilla leaves are kept in anoxic state, they easily discolor or fade even when exposed to light. They found that they did not, and completed the present invention. That is, the method for preserving foods using perilla leaves of the present invention is to seal and seal perilla leaves or foods using perilla leaves together with an oxygen scavenger in a substantially air-impermeable and transparent packaging material. It is characterized by The present invention will be described in detail below.

The perilla leaves of the present invention may be raw or may be processed by heating, salting, drying or the like. Foods using perilla leaves are rice, marinated fish products and other processed foods, wrapped with perilla leaves, sandwiched, kneading and mixing small pieces of perilla leaves and powder, By using perilla leaves, it is a food with a green color and flavor. In particular, the food itself is preferably a high-moisture food containing a large amount of water. In addition, the method of the present invention is a green vegetable whose quality is impaired due to easy change and fading of green when affected by light, as long as the method of the present invention can prevent its color tone change. , Can be applied to green vegetables instead of perilla leaves.

The deoxygenating agent enclosed with perilla leaves or foods using perilla leaves can be used without limitation as long as it has oxygen absorbing ability and is suitable for foods. Examples of the oxygen scavenger include sulfite, bisulfite, nithionite, oxalate, pyrogallol, rongalite, glucose, copper amine complex, ascorbic acid, erythorbic acid, iron powder, zinc powder, aluminum powder and the like. Known examples include various reducing substances as main components, and iron powder-based oxygen scavengers having a fast oxygen absorption rate are particularly preferably used.

The shape of the oxygen scavenger is, for example, powdery, granular,
It may be in the form of a lump, a sheet, or the like, and may be a sheet-shaped or film-shaped oxygen absorber in which the oxygen absorbent composition is dispersed in a thermoplastic resin, and the shape is not necessarily limited. The oxygen absorber is usually used as an oxygen absorber package packaged in a breathable material. The form of the oxygen scavenger package can be appropriately selected and is not limited to a pouch shape wrapped in a breathable material, a sheet shape laminated with a breathable material, and the like.

The breathable material forming part or all of the oxygen absorber package has an oxygen permeability of 500 ml / m ² · 24 Hr · atm.
Above, more preferably 5000 ml / m ² · 24 Hr · atm or more of breathable material is used. As the breathable material, for example, paper such as Japanese paper, foreign paper, rayon paper, non-woven fabric using various fibers such as pulp, cellulose, synthetic resin, oxygen permeable plastic film, microporous film or perforated product of plastic film. Breathable material, such as
Furthermore, a laminate of two or more selected from these may be used.

When the packaging material of the oxygen absorber package requires water resistance, a laminated material in which a water resistant material is appropriately combined is used as the breathable material. For example, a packaging material in which a perforated plastic film is laminated on a microporous film or a non-woven fabric is used, or a water-resistant non-woven fabric is used on one side and a non-breathable plastic film is used on the other side.

Perilla leaves or foods using perilla leaves are
There is a need to package and seal in a substantially air-impermeable and transparent packaging material with an oxygen scavenger. As a substantially non-breathable packaging material, the oxygen permeability is 100 ml /
Packaging materials of m ² · 24 Hr · atm or less are used. For example,
As a packaging material, a transparent bag made of a laminated film of vinylidene chloride-coated polypropylene / polyethylene, vinylidene chloride-coated nylon / polypropylene, vinylidene chloride-coated polyester / polyethylene, nylon / polyethylene, vinylidene chloride-coated polyvinyl alcohol / polyethylene, or vinyl chloride. A container such as a transparent tray, a glass container, or a metal container made of aluminum, iron, stainless steel, or the like in which a transparent material is partially used, which can be sealed is used.

[0012]

EXAMPLES The present invention will be described in more detail with reference to examples. Example Five perilla rolls (about 120 g) wrapped with perilla leaves
In a bag of KON / PE film (vinylidene chloride-coated stretched nylon / polyethylene laminate film), and an oxygen scavenger (Ageless FX-50; manufactured by Mitsubishi Gas Chemical Co., Ltd.) One side: breathable plastic nonwoven fabric, other side: non-breathable It was sealed together with an iron powder type oxygen scavenger packaged in a plastic film pouch. The bag in which the perilla rolls were sealed together with this oxygen scavenger was once placed in a dark place at 5 ° C for about 20 hours, and it was confirmed that the oxygen concentration in the bag was 0.1% or less, then at 5 ° C / 5000. It was stored under the fluorescence of looks and the color change and flavor change of perilla leaves wrapped around the kamaboko and the flavor change of the kamaboko were investigated daily. For the comparative example, a comparative example was prepared in which the perilla-rolled fish paste was sealed and stored in a KON / PE film bag in the same manner as in the above-mentioned example except that the oxygen absorber was not used. The results of Examples and Comparative Examples are shown in Table 1.

[0013]

[Table 1]

As is clear from the results shown in Table 1, when the oxygen absorber was not used, the leaves of the perilla leaves faded on the third day, but in the present example using the oxygen absorber, It was possible to completely prevent fading of perilla leaves for 10 days. As a result, perilla rolls have a long shelf life because the perilla leaves easily discolor and lose their commercial value, despite the relatively long shelf life of the perilla rolls. Although it was not possible, by the method of the present invention,
It can be displayed for a long time while being displayed in an open showcase or the like illuminated by a light such as a fluorescent light, while keeping the bright green color and keeping the quality of the kamaboko fresh.

[0015]

EFFECT OF THE INVENTION According to the method of the present invention, perilla leaves or foods using perilla leaves, which are easily discolored and discolored due to the influence of light and whose flavor is deteriorated, are provided with a transparent packaging material whose contents are easily visible. It can be packaged, and by keeping it in an oxygen-free state by enclosing it with an oxygen scavenger, even if it is exposed to light, it completely prevents discoloration / discoloration and flavor deterioration of perilla leaves and impairs the color tone and flavor. The freshness can be maintained without any use, and perilla leaves or foods using perilla leaves can be stored for a long time. In this case, it goes without saying that not only the color tone change and flavor deterioration of perilla leaves can be prevented, but also the freshness of the food itself using perilla leaves can be maintained. As a result, according to the method of the present invention, an open showcase in which bright perilla leaf color is for sale and perilla leaves or foods using perilla leaves are illuminated by light such as sunlight and a fluorescent lamp. It is possible to easily display the contents on the display and sell them for a long time.

Claims (1)

[Claims] 1. A food product using perilla leaves, which is characterized in that perilla leaves or food products using perilla leaves are packaged and sealed in a substantially air-impermeable and transparent packaging material together with an oxygen scavenger. How to save.