JPH01294473A - Freshness keeping container - Google Patents

Abstract

PURPOSE:To easily keep the freshness of food, by constituting a container, which has a double structure part consisting of an outer wall composed of a metal or a resin having a gas barrier property and an inner wall having air permeability and provided with pores communicating from the single surface thereof to the other surface thereof, of a housing body, a lid body, a gas absorbing body and a clamping part. CONSTITUTION:A freshness keeping container has a double structure part, which consists of an outer wall 4 composed of a metal or a resin having a gas barrier property and an inner wall having air permeability and provided with pores having a pore size of 0.01-10mum communicating from the single surface thereof to the other surface thereof at least at a part thereof, formed to at least a part thereof. A housing body 1 and a lid body 2 blocks the invasion of air from the outside of the container by an O-ring and a clamping part 7 such as a screw. A gas absorbent 8 such as an oxygen scavenger, a desiccant or an adsorbent is received in the space surrounded by the outer wall 4 and the inner wall 5 and food is received inside the inner all, that is, in the space surrounded by the inner wall 5 and a part of the outer wall 4. Oxygen in the container is absorbed and removed by the oxygen scavenger to prevent the oxidative deterioration of the components of the food, and fresh nutritive value, taste and hue are protected and inspect injury is prevented and the freshness of the food can be kept.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is characterized in that the inside of a closed container is partitioned with a breathable partition, one side is filled with an oxygen scavenger such as activated iron oxide, a desiccant, an adsorbent, etc. By placing food on one side, the container prevents oxidation and deterioration of all food ingredients such as oils, vitamins, flavoring ingredients, and pigments, protects the nutritional value, flavor, and color of freshly prepared food, prevents insect damage, and maintains the freshness of food. It is related to.

[Prior Art] Vacuum packaging and gas-filled packaging using packaging materials having gas barrier properties have conventionally been used as containers for preserving and preserving the freshness of foods. However, these methods require large-scale equipment in addition to containers, and cannot be carried out easily at home.

There is a packaging form in which individually packaged oxygen absorbers are placed within a packaging material having gas barrier properties to absorb and remove oxygen within the packaging material to maintain the freshness of the food. However, in the case of fluid foods such as miso, if the individual packaging is covered with miso, oxygen absorption is hindered, and to prevent this, the individual packaging must be placed in the upper space of the container. It had the disadvantage that its use was limited by the properties of the food.

[Problems to be solved by the invention] Conventional technology aims to maintain freshness during the distribution process from the manufacturing stage to the consumer, so once the food reaches the consumer and is opened, Subsequent retention of freshness was not guaranteed. Furthermore, at present, only airtight plastic containers are used to store homemade foods, which is not sufficient to maintain freshness. Storing it in a refrigerator or freezer is more effective in maintaining its freshness, but this is not a problem when transporting it by car or the like. Refrigerators for cars have recently become commercially available, but when the engine is stopped, the refrigeration function also stops and the freshness-keeping effect disappears, making it very inconvenient when living outdoors, such as when camping.

Therefore, there is a need for a container that can easily maintain the freshness of food at home without the need for large-scale equipment, and that can easily maintain the freshness of food regardless of the nature of the food, whether on the move or when living outdoors. Ta.

[Means for Solving the Problems] The present invention was achieved as a result of the inventors' diligent efforts to solve these problems, and anyone can easily determine the properties of food at any location. The purpose is to provide a container that can maintain freshness regardless of how it is stored. I will now explain its configuration.

The freshness preserving container of the present invention has an outer wall made of metal or a resin having gas barrier properties, and an inner wall that is air permeable and has minute pores of 0.01 μm to 10 μm in diameter at least in part that communicate from one side to the other. A container having at least a part of a double structure consisting of a casing, a lid, a gas absorber positioned between the outer wall and the inner wall, and a tightening part between the casing and the lid. It is composed of. The casing and/or the lid have the above-mentioned double structure, and the gas absorber is located in a space surrounded by the outer wall and the inner wall.

The inner wall of the freshness-preserving container of the present invention is preferably made of a member that is breathable and has, at least in part, micropores with a pore diameter of 0.01 μm to 10 μm that communicate from one side to the other. If the pore size is smaller than 0.01 μm, there is a risk that the effect of the gas absorber will not be fully demonstrated, and if the pore size exceeds 10 μm, the gas absorber will leak from the fine pores when using a powdered gas absorber, causing food damage. There is a risk of contaminating the

Specifically, preferred are sintered bodies of metals, ceramics, thermoplastic resins, etc., porous films, nonwoven fabrics, paper, etc., or composites thereof. More preferably, at least one resin selected from polyolefins, polyamides, polyvinyl chloride, etc. It is preferable to use a uniform resin molded product made of a resin, preferably a polyolefin resin and an inorganic fibrous filler, and the molded product can be obtained by injection molding or extrusion molding. The resulting molded product blocks aqueous solutions and allows only gases such as oxygen to pass through, making it most suitable for preserving solutions or paste-like foods, as it prevents the gas absorber from becoming wet and becoming ineffective. ing. A composite of the resin molded product and at least one of a sintered body of metal, ceramics, thermoplastic resin, etc., a porous film, a nonwoven fabric, or paper can also be used depending on the purpose.

As the gas absorber to be placed between the outer wall and the inner wall of the present invention, oxygen scavengers such as activated iron oxide, desiccants, adsorbents, etc. can be used, and mixtures thereof can also be used.

The freshness preserving container of the present invention has a sealing part such as an O-ring or a gas cap/nod that blocks air from entering from outside the container, a tightening part made of a screw or clamp, etc., and a tightening part that is used for deaerating and restoring the pressure inside the container. It consists of a cook. A vacuum pump may be used to actively degas.

The gas absorber may be located between the outer wall and the inner wall through an inlet/outlet having a sealing part such as an O-ring or gasket provided on the housing and/or the lid, and a tightening part such as a screw or clamp. The casing and/or lid, which has been assembled in advance and positioned between the outer wall and the inner wall, is covered in a hermetically sealed state with metal or resin having gas barrier properties, and when used, the cover is removed to separate the casing and the lid. You may also connect them.

[Operation: Place food inside the inner wall, insert a waste absorber such as an oxygen absorber, desiccant, or adsorbent between the outer and inner walls, and tighten the casing and lid to prevent air from entering the container from outside. cut off. The oxygen in the air left in the container is absorbed and removed by the oxygen scavenger, not only in the space formed by the inner and outer walls, but also in the inner wall through the breathable inner wall. It prevents oxidative deterioration of all food ingredients such as fats, oils, vitamins, flavoring ingredients, and pigments, protects the nutritional value, flavor, and color of freshly prepared food, prevents insect damage, and maintains the freshness of food.

The above operation can easily maintain the freshness of food even at home without the need for large-scale equipment.6More conveniently, even if the lid is temporarily opened to take out a portion of the stored food, the lid cannot be opened again. If you keep it closed, it will not lose its freshness significantly even during subsequent storage. However, it is possible to eat highly fresh food even when traveling by car or living outdoors.

Food is placed inside the inner wall, gas absorbers such as oxygen scavengers, desiccants, and adsorbents are placed between the outer and inner walls, the housing and lid are tightened, and air is degassed using a vacuum pump via a cock. This can increase the effect of maintaining the freshness of food during storage.

When preserving food in solution or paste form,
By using a material that is breathable and does not allow aqueous solution to pass through as the inner wall, it is possible to prevent the gas absorber from becoming wet and becoming ineffective.

When preserving fruits and vegetables such as vegetables, a gas absorber that absorbs toxic gases such as carbon dioxide and ethylene to maintain freshness is inserted between the outer and inner walls, and the casing and lid are closed. , can maintain freshness.

The effectiveness of the gas absorber can be confirmed by providing a transparent part on the entire surface or a part of the outer wall and placing an oxygen concentration indicator inside the transparent part.

Next, an example of the structure of the freshness preserving container of the present invention is shown in FIG. The freshness preservation container is composed of a casing 1, a lid 2, and an opening 3 for inserting and removing a gas absorber. The casing 1 and/or the lid 2 has a double structure including an outer wall 4 made of metal or resin having gas barrier properties, and an inner wall 5 having air permeability. The casing 1 and the lid 2 block air from entering from outside the container by an O-ring 6 and a tightening part 7 such as a screw. An oxygen absorber is placed in the space surrounded by the outer wall 4 and inner wall 5.
By putting a gas absorber 8 such as a desiccant or an adsorbent, and placing the food inside the inner wall, that is, in the space surrounded by the inner wall 5 and part of the outer wall 4, the oxygen in the air left in the container is absorbed by the inner wall. The oxygen scavenger absorbs and removes not only what is in the space formed by the outside wall, but also what is inside the inner wall through the breathable inner wall, so it removes all kinds of food, including fats, oils, vitamins, flavor components, and pigments. Prevents oxidative deterioration of ingredients,
It protects the nutritional value, flavor, and color of freshly prepared food, prevents insect damage, and maintains the freshness of food.

By deaerating from the cock 9, the effect of maintaining the freshness of the food being stored can be further increased.

Next, other application examples of the present invention are shown in FIGS. 2, 3, and 4. The freshness preservation container is composed of a housing 1 and two lids 2. The housing 1 is composed of an outer wall 4 made of metal or resin having gas barrier properties, a tightening part 7, and a cock 9. In the lid body 2, a gas absorber 8 such as a deoxidizing agent, a desiccant agent, an adsorbent, etc. is placed in advance in the space surrounded by the outer wall 4 and the inner wall 5, and the opening of the outer wall 4 or the fourth As shown in the figure, the entire assembly is covered with a cover 10 made of metal or resin having gas barrier properties. The lid body 2 covered with the cover 10 can maintain the effectiveness of the gas absorber 8 until use. When in use, by peeling off the cover 10 and tightening it onto the housing 1, the container immediately becomes the freshness preserving container shown in FIG. This saves the effort of putting in and taking out the gas absorber 8, and even when the effectiveness of the gas absorber 8 has diminished, the initial effectiveness can be regained by peeling off the cover 10 and tightening the new lid body 2 to the housing 1. This becomes the freshness preservation container shown in Figure 2.

Example 1 A uniform resin molded product made of polypropylene and an inorganic fibrous filler was molded into the shape of the inner wall 5 shown in FIG. 3 by injection molding. Assemble the obtained inner wall as shown in Figure 3, and add an oxygen absorber (Ageless FX) to the space surrounded by the outer wall 4 and inner wall 5.
(manufactured by Mitsubishi Gas Chemical Co., Ltd.), and the opening in the outer wall was covered with a cover 10 made of alumininate film.

Two lid bodies 2 covered by a cover 10, a casing 1 and a second
Assemble the container as shown in the figure, fill the container with soy sauce to half its height, and close the cock 9.

Comparative Example 1 Assemble the two lids made of only the outer walls used in Example 1 and the casing, and attach an oxygen absorber (Ageless FX, manufactured by Mitsubishi Gas Chemical Co., Ltd.) with double-sided tape to the inside of the upper lid. I pasted it on the container, filled it with soy sauce to half the height of the container, and closed the cooker 9.

[Effect of the invention] When the containers of Example 1 and Comparative Example 1 were loaded into a car and the lids of each were opened 20 days later, it was found that the soy sauce in the freshness preservation container of Example 1 had a different color and flavor. No change was observed. The lid was again tightened to the housing and stored, but no change in color or flavor was observed even after 20 days. After 20 days, the soy sauce placed in the container of Comparative Example 1 had turned dark black in color and had lost its flavor. A closer look at the lid of Comparative Example 2 revealed that the surface of the oxygen absorber attached to the lid was wet with soy sauce.

The freshness preserving container of the present invention has the following features and effects.

■ Food freshness can be easily maintained at home without the need for large-scale equipment.

■No matter what the nature of the food to be added, it will not interfere with the effectiveness of gas absorbers such as oxygen scavengers, desiccants, and adsorbents.

(2) Even if the package is opened, it can be resealed easily and reliably, and freshness can be maintained.

■There are no pinholes or damage that are rarely seen in film packaging.

■Heat sterilization and freezing. Can be stored refrigerated.

[Brief explanation of the drawing]

FIG. 1 is a half-sectional view showing an embodiment of the freshness-preserving container of the present invention, and FIG. 2 is a half-sectional view showing an embodiment of the freshness-preserving container of the present invention in a cartridge type. FIGS. 3 and 4 are half-sectional views showing an embodiment of the packaging form of the cartridge-type freshness-preserving container of the present invention. 1... Housing, 2... Lid, 3... Insertion and removal 0.4
···outer wall. 5... Inner wall, 6... ○ ring, 7... Tightening part, 8... Gas absorber, 9... Cock, 10... Cover patent applicant New Materials Research Institute Co., Ltd. Figure 1 Figure 2 Figure 1 Figure 3 2...Lid body 10...Cover

Claims (8)

[Claims] (1) An outer wall made of metal or resin with gas barrier properties, and a hole diameter of 0 that is breathable and communicates from one side to the other.
．． A container having, at least in part, a double structure part consisting of an inner wall having micropores of 01 μm to 10 μm in at least a part, the container having a gas absorbing container located between a casing, a lid, and an outer wall and an inner wall. 1. A freshness-preserving container comprising a body and a tightening part for a housing and a lid. (2) The scope of claims characterized in that the inner wall is breathable and has at least a portion of micropores with a pore diameter of 0.01 μm to 10 μm that communicate from one side to the other, and does not allow an aqueous solution to pass through. The freshness preservation container described in paragraph 1. (3) The freshness preserving container according to claims 1 and 2, wherein the gas absorber is any one of an oxygen scavenger, a desiccant, an adsorbent, etc., or a mixture thereof. (4) The freshness preserving container according to Claims 1 and 2, wherein the tightening part is made of a sealing material such as an O-ring or a gasket, and a screw or a clamp. (5) The freshness-preserving container according to claims 1 and 2, characterized in that the casing and/or the lid have a cock that communicates and shuts off the inside and outside of the container. (6) Inserting and removing gas absorbers such as oxygen scavengers, desiccants, adsorbents, etc., which have sealing parts such as O-rings or gaskets and tightening parts such as screws or clamps on a part of the housing and/or lid body. The freshness preserving container according to claims 1 and 2, characterized by having a mouth. (7) An outer wall made of metal or resin with gas barrier properties, and a hole diameter of 0 that is breathable and communicates from one side to the other.
．． The casing and/or lid body has at least a part of the double structure with an inner wall having micropores of 01 μm to 10 μm, and a gas absorber is positioned between the outer wall and the inner wall. The freshness-preserving container according to claim 1 or 2, characterized in that the container is hermetically covered with a metal, a resin having gas barrier properties, or the like. (8) A vacuum pump is connected to a cock provided on the casing and/or the lid that connects and shuts off the inside and outside of the container, according to claims 1 and 2. freshness preservation container.