JPH03210170A - Mildew-proof storage of foodstuff using sealing bag - Google Patents

Abstract

PURPOSE:To enable ready handling and long term storage without growth of mildew by attaching a flat cylinder-shaped valve unit equipped with a lami-zipper and capable of opening and closing to a sealing bag made of a low air-permeation synthetic resin film. CONSTITUTION:A valve unit 1 is composed of a flat cylinder-shaped body made of a synthetic resin film the inner surface of which has a property capable of mutual blocking and has a structure capable of opening and closing by a lami-zipper 2 and the upper end 6 and the lower end 5 thereof are open. As the body 3 of a sealing bag, a pair of polyethylene film in which one side is coated with polyvinylidene chloride are used and the polyethylene films are placed on top of the other (polyvinylidene chloride coated surface is towards the outside). The flat cylinder-shaped sealing bag is inserted into a desired position of the upper part of the sealing bag and heat sealing is carried out between the inner surfaces of the upper side of the sealing bag and the outer surfaces of the flat cylinder unit in a prescribed width. A small bag containing a substance for deoxidation and ethanol vaporization is subsequently sealed into the above-mentioned bag. Foodstuffs can be stored, thereby, for a long period without growth of mildew, etc., and partial foodstuffs can be taken out readily because of ready opening closing.

Description

[Detailed Description of the Invention] (Industrial Application Field) Foods that are prone to mold, such as rice cakes, are preserved to prevent mold by coexisting with ethanol gas emitting substances and/or oxygen scavengers using airtight bags that can be opened and closed. Find out how.

(Prior art and its problems) Conventionally, airtight bags for mold-proof storage of food, which are made of a film with low air permeability that prevents mold by allowing food to coexist with an ethanol gas emitting material and/or an oxygen absorber, have an opening. A fastener was attached to the part that could be opened and closed to make it airtight. Such ideas were published in Utility Model Application No. 54-136116 and Utility Model Application No. 59-87.
It is disclosed in Japanese Patent No. 475. Although such food preservation bags are effective in preserving foods, etc., they require a fastener in addition to the film bag, which poses problems in terms of usability and price.

The present inventors have made extensive studies to solve this problem, and as a result, have arrived at the present invention. The gist of the present invention is ``a flat cylindrical body made of synthetic resin film with openings at the upper and lower ends, and a valve element attached with a laminated zipper to allow food to be taken in and out through the valve element. This is a method for preventing mold-preservation of foods in which mold-prone food is kept in a sealed bag made of a synthetic resin film with poor moisture content and an ethanol gas emitting substance and/or an oxygen scavenger.

Next, some words of the gist of the present invention will be explained. As is clear from the above description, the valve body is a flat cylindrical body with open upper and lower ends, and when pressure is applied to the inside of the airtight bag of the present invention, it has the effect of a reverse valve that closes due to the pressure. It is something that you have. Also, a lamin tube is an opening/closing device that is often used to open and close the mouth of a synthetic resin bag. This opening/closing tool is made of synthetic resin and has two rail-shaped protrusions arranged in parallel and close to each other so that the rail-shaped protrusions fit into the other surface. Next, "synthetic resin film with poor air permeability" means a synthetic resin film that has barrier properties against oxygen gas and ethanol gas. As specific examples, polyolefin films coated with polyvinylidene chloride (this coating is referred to as ni-treatment), K-treated nylon/polyolefin laminate films, and aluminum foil laminated with polyolefin are particularly preferred. Next to these, a laminate film of biaxially stretched polypropylene and an unstretched polyolefin film is suitable. Biaxially oriented polypropylene films may also be used.

In addition, the above-mentioned valve body has a property that the inner surfaces of its cylindrical body block each other (a phenomenon in which the surfaces are in close contact with each other and it becomes impossible to move them flatly against each other. However, it is possible to peel them off.) preferable. The reason for this is that when pressure is applied to the inside of the sealed bag of the present invention, the inner surface of the valve body blocks, and the proper effect of the valve body becomes particularly good.

In order to make it easier to block the inner surface of the cylindrical body of the valve body, the synthetic resin film used for the valve body may be made of high-pressure polyethylene, which has blocking properties, or the inside of the cylindrical body may be It is a good idea to apply liquid paraffin or vaseline.

Next, the airtight bag used in the present invention will be explained with reference to the drawings, but the present invention is not limited to these examples.

FIG. 1 is a front view of one embodiment of a sealed bag used in the present invention. Reference numeral 1 denotes a valve body, which is a flat cylindrical body made of synthetic resin film, and can be opened and closed by a laminated zipper 2. The upper end 6 and the lower end 5 are open. 3 is the main body of the airtight bag. The main body of this airtight bag is made by stacking two polyethylene films treated on one side (with the K-treated side on the outside) and heat-sealing the periphery.
The portion of the valve body that contacts the flat cylindrical body is heat-sealed to the outside of the flat cylindrical body in the following manner. That is,
A sheet such as a Teflon sheet that does not fuse with the inner surface of the flat cylindrical body even when heat pressure is applied is inserted into the inside of the flat cylindrical body in advance (this sheet will be removed later), and then the flat cylindrical body is placed in an airtight bag. It is inserted into the desired position in the upper part, and the inner surface of the upper side of the airtight bag and the outer surface of the flat cylindrical body are heat-sealed to a predetermined width.

The flat cylindrical body with a laminated zipper can be purchased from Seisaku Nippon Sha Co., Ltd.

FIG. 2 shows the external appearance of several pieces of rice cakes being stored in the airtight bag. Although it is hidden in the figure, a small bag containing an oxygen removing and ethanol vaporizing agent is sealed inside this bag.

(Effects of the present invention) Some of the effects of the present invention have already been described, but important ones are as follows. That is, (1) Even if the bag is repeatedly opened and closed in order to take out a portion of the food in the airtight bag as needed, the food can be preserved for a long period of time without the generation of microorganisms such as mold. for example,
The effect of preserving uneaten food that is susceptible to mold growth by the method of the present invention is extremely large in real life.

- The airtight bag of the present invention is extremely easy to open and close, making it easy to take out a portion of the food.

■ The airtight bag of the present invention can be manufactured easily and at low cost.

Next, a preservation test of cut rice cakes was conducted using the method of the present invention and the conventional method. The results will be shown to further clarify the effects of the present invention.

25 bags made of treated nylon/polyethylene laminate film, 20cm x 30cm heat-sealed on three sides.
Bags were prepared, and 5 bags each were used in the next 5 test sections.

The first section is 20 pieces of Kirimochi (approximately IKg) in the above bags (5 bags)
The samples were placed in each bag and the opening was sealed to serve as a control for other test plots.

In the second section, a flat cylindrical body (without a laminated zipper) made of high-pressure polyethylene film, measuring 12 cm x 16 cm, was placed on both lower ends of the nylon-polyethylene laminate film treated with the above-mentioned method, as shown in Figure 1. A bag was attached to the opening of a plastic bag such that the bag opened to the outside only through the flat cylindrical body. 10g of metal iron powder, 0.5g of common salt, 3g of light anhydrous silicic acid (pharmaceutical product), and 5g of 99.5% ethyl alcohol are thoroughly mixed and then laminated with perforated polyethylene film and Japanese paper.
A sachet containing a deoxidizing and ethanol vaporizing agent (hereinafter referred to as preservative) filled into a pouch measuring 8 cm x 8 cm and 20 cut mochi (approx. Bag making (5
It was filled into a multi-lobed bag and subjected to a storage test.

For the third section, the airtight bag of the present invention (see FIG. 1) was used as described below. A storage bag similar to that used in Section 2 was used, except that a laminated zipper was attached at a position approximately 1 cm from the top of the flat cylindrical body attached to the bag made of nylon polyethylene laminate film used in Section 2. Each of the 5 bags contains 1 sachet containing the same preservative as in the 2nd ward and about 1 piece of 20 pieces of cut mochi.
kg was put in the container, the lami zipper was closed, and the container was subjected to a storage test.

Another sealed bag of the present invention was also used in the fourth section. That is, storage was the same as in Section 2, except for the laminated zippers attached to the upper and lower ends (about 1 cm from the upper and lower sides, respectively) of the flat cylindrical body attached to the bag made of treated nylon polyethylene laminate film. Using bags, one sachet containing a preservative and 20 pieces of rice cakes were placed in each of the five bags in the same manner as in the second section, and both zippers were closed, and the storage test was conducted.

In the fifth section, one bag containing the preservative and 20 slices of rice cakes (approximately 1 kg) were placed in each of the five bags made of treated nylon/polyethylene laminate film, and the opening was opened to a length of 2.
The 5 cm openable and closable fastener was sealed with a device (referred to as an uneven backing) and subjected to a storage test. The tightening tool is a concave-convex backing disclosed in Japanese Utility Model Application No. 59-87475, and the tightening tool is as described below.

That is, one end side of a pair of arched plastic tools is pivotally connected by a pivot, and the gently curved part forms one long male mold with an n-shaped cross section, and the other has an opening-shaped cross section. A device that forms a long female mold that fits firmly into each other and can be easily removed, and that allows the front end of a plastic film bag to be fastened between the male mold and the female mold so that it can be opened and closed. It is.

Store the storage bags (containing cut rice cakes) in the above-mentioned sections 1 to 5 at room temperature (approximately 23℃) from Monday, and remove one cut rice cake from each storage bag every day except Saturday and Sunday. We observed the growth of mold on rice cakes.

In Ward 1, each time a mochi was taken out of a storage bag, the seal had to be broken and the bag re-sealed.

The results were as shown in Table 1.

As shown in Table 1, the 3rd and 4th sections using the airtight bag of the present invention and the 5th section using the uneven backing showed almost no mold growth for about one month during the test, and no mold was observed in the control group. A significant difference was observed compared to the 1st section and the 2nd section of the comparative example. However, in the 5th section where uneven backing was used, mold growth was observed in 1 out of 5 bags after 10 days had passed, which is relatively early.

This is presumed to be due to wrinkles in the film around the opening of the bag.

Note: Shows the number of bags in which mold was expected to grow out of 5 bags in each xkl area of Engineering 15.

[Brief explanation of drawings]

FIG. 1 is a front view of a sealed bag used in an embodiment of the present invention, and FIG. 2 is an external view of the sealed bag with several pieces of Kasuri cut into it.

Claims (1)

[Claims] (1) Upper end (6) and lower end (5) made of synthetic resin film
The inside of a sealed bag made of synthetic resin film with poor air permeability through which food can be taken in and taken out through the valve body, which is made by attaching a valve body (1) that can be opened and closed by attaching a lami zipper (2) to a flat cylindrical body with an open opening. A mold-proofing method for preserving foods that is susceptible to mold growth in coexistence with an ethanol emitting material and/or an oxygen absorber.