JP2014084148A - Packaging container for food preservation and preservation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic-made packaging container for food preservation and a preservation method, which can prevent quality deterioration of stored food and maintain freshness at a low cost, and does not generate waste in a food storing process.SOLUTION: A plastic-made packaging container for food preservation can enclose stored food by covering a storage port 5 with an opening and closing lid 3 and sealing with a pressure sensitive adhesive. A release paper 1, which is stuck on the surface of the pressure sensitive adhesive layer 2 until sealing the storage port 5, and released from the pressure sensitive adhesive layer 2 in sealing the storage port 5, is used, and the release paper 1 contains a quality deterioration preventive chemical, and the release paper is stored with the stored food in the food preservation container after being released from the pressure sensitive adhesive layer 2.

Description

  The present invention relates to a plastic food storage packaging container, and more particularly to a packaging container and a storage method provided with functions for preventing deterioration and deterioration of stored food and maintaining freshness.

  Plastic food storage packaging containers are used for the purpose of protecting stored foods. In that case, in order to prevent deterioration and deterioration and maintain freshness, not only simply storing food in packaging containers, Generally, a medicine pouch containing a chemical for preventing deterioration is enclosed together with food, and the medicine functions in the container. In addition, the packaging container itself is provided with a function for preventing deterioration. Desiccants, antibacterial agents, oxygen scavengers, freshness-preserving agents, etc. are used as anti-deterioration agents that are enclosed in food containers together with foods. Furthermore, these chemicals are kneaded into a plastic film or sheet constituting the packaging container, and the plastic film or sheet is processed into a bag or box-shaped packaging container to obtain a functional packaging container.

  On the other hand, as a method for sealing a storage port after food is stored in a food storage packaging container, heat sealing or sealing with an adhesive is performed. Sealing with adhesive does not require a device such as a heat sealer, and it can be easily sealed, and after using a portion of the stored food, the remaining food is stored again, and the storage mouth is stored with the adhesive. Often used because it can be resealed. However, in this sealing method using an adhesive, it is necessary to cover the surface of the adhesive layer provided near the storage opening with release paper until the food is stored. Is sealed. Therefore, in this method, the release paper becomes waste in the food storage process.

  In addition, using a plastic film or sheet kneaded with a drug as described above to make a functional packaging container increases the cost of packaging materials because such a processed plastic film or sheet becomes expensive. Will occur. For this purpose, the above-mentioned medicine is not kneaded and contained in the plastic film or sheet constituting the packaging container, but instead of the medicine sachet, a composite plastic film or sheet containing a freshness-preserving agent is placed in the packaging container. A label made of a plastic film or sheet containing a freshness-keeping agent is also attached to the container (see Patent Documents 1 and 2). In this method, a composite resin sheet containing a freshness-preserving agent is used, and the cost can be reduced compared to processing the entire constituent material of the packaging container, but a special plastic film or sheet is used as the packaging container body. Need to be created separately, and requires some processing cost.

  In recent years, due to soaring plastic materials, the need for cost reduction is high, the demand for reducing waste related to packaging materials has increased, and the demand for reduction of raw materials to be used has become stronger. It is necessary to meet these demands.

Japanese Patent Laid-Open No. 7-16976 JP-A-7-20784

  The problem to be solved by the present invention is to store plastic foods at low cost, preventing deterioration and deterioration of the stored food, maintaining freshness, and generating no waste in the food storage process. It is to provide a packaging container and a storage method.

  In the present invention, in the plastic food storage packaging container capable of covering the storage opening with an open / close lid and sealing with an adhesive and enclosing the stored food, the adhesive layer until the storage opening is sealed A release paper that is affixed to the surface and peeled off from the pressure-sensitive adhesive layer when the storage opening is sealed is used. The release paper contains an anti-deterioration agent, and after peeling from the pressure-sensitive adhesive layer, the food together with the stored food Provided is a food storage packaging container which is stored in a storage container.

  The release paper is preferably a polyolefin-based plastic film or sheet containing a chemical having a function of preventing deterioration, and the release paper is a container at a position inside the container after the storage port is sealed. A mode in which the main body or the opening / closing lid is adhered is also included.

  The storage method of the present invention is a method of storing food in a plastic food storage packaging container, covering the storage opening with an opening / closing lid, sealing with an adhesive, and sealing the storage opening. Until then, as a release paper that is affixed to the surface of the adhesive layer and peeled off from the adhesive layer when sealing the storage port, using a release paper containing a deterioration-preventing agent, after peeling from the adhesive layer The food is stored in a food storage container together with the stored food.

  In the food storage packaging container and storage method of the present invention, it is a necessary member for sealing the food storage port with an adhesive, but when the storage port is sealed, it is removed from the surface of the adhesive layer. The released release paper is reused, and waste is not generated in the food storage process. Furthermore, the plastic film or sheet provided with the function of preventing deterioration can be used only for the release paper for covering the surface of the pressure-sensitive adhesive layer without using the packaging container body, and the production cost of the packaging container can be reduced. .

  In addition, the deterioration prevention agent should be contained only in the release paper, not the plastic film or sheet of the packaging container body material. Considering the deterioration of the transparency of the material due to the incorporation of the deterioration prevention agent. Therefore, the content can be set so that an appropriate function for preventing deterioration can be exhibited.

It is the front and cross-sectional schematic explanatory drawing of the bag-shaped packaging container of the form which seals a storage opening with the adhesive layer provided in the flap-shaped opening / closing lid. It is the front and cross-sectional schematic explanatory drawing of the bag-shaped packaging container of the form which seals a storage opening with the adhesive layer provided in the main body. It is a front model explanatory drawing which shows the state which accommodated the foodstuff and the release paper in the packaging container, and was sealed with the adhesive layer. It is the front and cross-sectional schematic explanatory drawing of the bag-shaped packaging container of the form which adhere | attached the edge part of the release paper which covers the adhesive layer provided in the flap-shaped opening / closing lid | cover on the main body. It is the front and cross-sectional schematic explanatory drawing which show the state which sealed the packaging container shown in FIG. 4 with the adhesive layer. In a box-shaped packaging container that combines a box-shaped packaging container main body and a flat storage port sealing lid, a cross-sectional schematic diagram of the packaging container in a form in which the end of the release paper covering the adhesive layer is bonded to the storage port sealing lid It is explanatory drawing.

  The plastic food storage packaging container according to the present invention is manufactured by processing a plastic material, and a relatively thin plastic film is used as a soft packaging material or a thicker sheet. Depending on the type of food to be stored, packaging containers that are molded into box shapes, cup shapes, tray shapes, etc., and packaging containers that are molded using methods such as injection molding or blow molding can be used. it can.

  Of the various types of plastic food storage packaging containers described above, a bag-shaped packaging container and a box-shaped packaging container are shown in the drawings as examples, and will be described in detail below.

FIG. 1 shows a bag-shaped plastic food storage packaging container made of a plastic film having a thickness of about 10 to 50 microns. A ₁ is a schematic explanatory view of the front surface, B ₁ is a schematic explanatory view of a cross section along the line CC, and the thickness of the film is exaggerated for explanation. In the packaging container shown in this figure, a pressure-sensitive adhesive layer 2 is provided in a band shape on a flap-shaped opening / closing lid 3, and a release paper 1 is stuck on the surface of the pressure-sensitive adhesive layer 2 to protect the surface. The packaging container body 4 is formed by bending a plastic film at the bottom portion 7, the side portion is sealed by a heat seal portion 6, is formed in a bag shape, and the inside is a storage portion 10. In the example of this figure, the bottom part 7 forms a collar part and is a square bottom type. After opening the storage port 5 and storing the food in the storage unit 10, the release paper 1 is peeled off from the surface of the adhesive layer 2, stored together with the food in the storage unit 10, the flap-shaped opening / closing lid 3 is bent, and the adhesive layer 2 FIG. 3 shows a state where the food 20 is sealed together with the release paper 1. In FIG. 3, the surfaces of the food 20 and the pressure-sensitive adhesive layer 2 are formed on the storage portion 10 formed by sealing the four sides by the flap-like opening / closing lid 3 sealed by the adhesive layer 2, the heat seal portion 6 and the bottom portion 7. The release paper 1 peeled off is stored and enclosed. Since the release paper 1 contains an anti-deterioration agent, the stored food can be prevented from being deteriorated and the freshness can be maintained.

FIG. 2 is another embodiment of the embodiment shown in FIG. 1, A ₂ is a front schematic explanatory view, B ₂ is a cross-sectional schematic explanatory view along the line DD, and the adhesive layer 2 is placed in the vicinity of the storage port 5. In this configuration, the packaging container body 4 is provided in a strip shape. A release paper 1 is attached to the surface of the adhesive layer 2 as in FIG. In this embodiment, before food is stored, if the adhesive layer 2 is provided on the flap-shaped opening / closing lid 3 or only provided on the packaging container body 4, The shape is the same as that of the packaging container shown in FIG. 1, as shown in FIG.

FIG. 4 shows still another embodiment of the bag-like packaging container, in which A ₄ is a schematic front view for explaining and B ₄ is a schematic cross-sectional view for taking along line EE. In this embodiment, the release paper 1 attached to the surface of the adhesive layer 2 provided in a band shape is further bonded to the packaging container body 4 at the release paper bonding portion 8. In this embodiment, in order to cover and seal the storage opening 5 with the flap-shaped opening / closing lid 3, the adhesive layer 2 is peeled off from the release paper 1, and the flap-shaped opening / closing lid 3 is bonded to the packaging container body 4. Done. FIG. 5 shows a state in which the storage port 5 is sealed. A ₅ is a schematic front view for explaining A ₅ , and B ₅ is a schematic cross-sectional explanatory view taken along line FF. In this figure, the adhesive layer 2 provided on the flap-like opening / closing lid 3 is peeled off from the release paper 1 adhered to the packaging container body 4, and the flap-like opening / closing lid 3 is further folded, so that the adhesive layer 2 is removed from the packaging container body. 4, the storage port 5 is sealed, and the storage portion 10 is formed. At this time, the release paper 1 is also stored in the storage unit 10 together with the food to be stored because the release paper 1 is adhered to the packaging container body 4 by the release paper bonding unit 8 at a position enclosed in the storage unit 10. Adhesion of the release paper 1 to the packaging container body 4 in the release paper adhesion portion 8 may be performed by an adhesive, or may be performed by ultrasonic shielding or heat fusion. In this figure, food to be stored in the storage unit 10 is not shown and is omitted.

  The aspect shown in FIG. 6 shows a box-shaped packaging container as the packaging container. The packaging container of this embodiment includes a box-shaped packaging container main body 14 and a flat plate-like opening / closing lid 13 that seals a storage opening that is an opening thereof. As shown in the upper diagram of FIG. 5, the flat opening / closing lid 13 is provided with an adhesive layer 2 in a strip shape at its end, a release paper 1 is attached to the surface of the adhesive layer 2, and a release paper bonding portion. 8 is bonded to the flat opening / closing lid 13. In this embodiment, as shown in the lower diagram of FIG. 5, after the food 20 is stored in the box-shaped packaging container body 14, the adhesive layer 2 is used to cover and seal the storage port with the flat opening / closing lid 13. It is performed by peeling off the release paper 1 and adhering the flat opening / closing lid 13 to the packaging container main body 14. The release paper 1 containing the anti-deterioration agent is adhered to the flat opening / closing lid 13 so as to be accommodated in the storage portion 10 in the packaging container body after the storage opening is sealed, and can be stored together with food. Yes. Similar to the above-described embodiment, the release paper 1 may be bonded to the flat opening / closing lid 13 in the release paper bonding portion 8 with an adhesive, or by ultrasonic shielding or heat fusion. In addition, including the above-described embodiment, the release paper bonding portion 8 may be bonded only partially or entirely as shown in the figure.

  The packaging container body such as a box or tray is made of a plastic material having a thickness of about 50 to 500 microns, which is slightly thicker than the plastic film used for the bag-shaped packaging container. In addition to being manufactured by vacuum molding, pressure molding, press molding, etc., the plastic sheet can be molded by injection molding or blow molding. The plastic material used for the flat opening / closing lid may be a plastic film or sheet having a thickness of about 10 to 500 microns.

  In the mode shown in FIGS. 4 to 6, since the release paper 1 is bonded and fixed, it is not mixed into the stored food. For this reason, when opening the open / close lid sealed with an adhesive, taking out and storing a part of the enclosed food, and re-encapsulating the remaining food, the release paper containing the alteration-preventing agent is removed. The food is not taken out together with the food, can always be kept in the packaging container, and the food can be stored stably and continuously.

  The plastic food storage packaging container of the present invention can use various plastic materials commonly used in packaging containers for both the container body and the opening / closing lid. For example, polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polyvinyl chloride, Examples thereof include plastics such as vinylidene chloride, polyamide, ethylene / vinyl acetate copolymer, ethylene / vinyl alcohol copolymer, composite materials thereof, and composite materials such as aluminum foil.

  The release paper is preferably used by kneading an anti-deterioration agent into a polyolefin resin such as polyethylene or polypropylene and molding it into a film or sheet, and the surface of the paper impregnated with the anti-deterioration agent is used. Paper that has been surface-released with a fluorine resin or a silicone resin can also be used. When a polyolefin-based resin is used, it can be used as a release paper without any surface treatment as in the case of using paper. Furthermore, a polyolefin-based resin kneaded with a deterioration preventing agent can be extruded to form a plastic film or sheet, and a release paper containing the deterioration preventing agent can be obtained. Even when a plastic film or sheet is used, it is useful to perform surface release treatment.

  Known agents can be used as the alteration preventing agent for preventing deterioration of the stored food and maintaining the freshness of the fresh food. Specifically, oxygen scavengers to prevent spoilage by microorganisms and deterioration due to oxidation, such as inorganic oxygen scavengers that use iron as the main agent, and organic oxygen scavengers that use ascorbic acid, gallic acid, glycerin, etc. as absorbents. Oxygen agents and the like, and antibacterial component sustained release agents such as ethanol sustained release agent, hinokitiol sustained release agent, allyl isocyanate sustained release agent, silver zeolite antibacterial agent, and freshness maintaining agents such as activated carbon, zeolite, silica gel, etc. Examples include ethylene adsorbents containing metals, metal oxides, silver ions, etc., brominated activated carbon, potassium permanganate, phosphates, ethylene decomposing agents such as percarboxylic acid polymers, carbon dioxide releasing agents, etc. can do.

  The above-mentioned deterioration preventing agent is kneaded into a polyolefin-based resin and molded into a film or sheet, the transparency of the film or sheet may be lowered depending on the component and content, and may be translucent or opaque. When used as a packaging container body, it becomes difficult to see the packaged contents, but it is not a problem to use as a release paper, and the components and contents can be set according to the purpose.

  As the adhesive for sealing the opening / closing lid, known adhesives such as rubber, acrylic and silicone can be used, and such an adhesive is applied to the opening / closing lid or the container body near the opening / closing lid. By doing so, a belt-like pressure-sensitive adhesive layer can be provided. And when the above-mentioned release paper is stuck on the surface of this pressure-sensitive adhesive layer and food is stored, this release paper can be removed and the opening / closing lid can be adhered to the packaging container body with the pressure-sensitive adhesive. Since the adhesion in this case is performed with an adhesive, it can be sealed again even if it is once opened, a part of the stored food can be taken out, and the remaining food can be packaged again.

  The packaging container and preservation method of the present invention are particularly suitable for preservation of foods such as fresh foods and various processed foods. In addition to foods, preservation packaging that deteriorates and deteriorates over time due to the action of spoilage and oxidation, etc. Can be used as a container.

DESCRIPTION OF SYMBOLS 1 Release paper 2 Adhesive layer 3 Flap-shaped opening / closing lid | cover 4 Packaging container main body (bag shape)
DESCRIPTION OF SYMBOLS 5 Storage port 6 Heat seal part 7 Bottom part 8 Release paper adhesion part 10 Storage part 13 Flat opening / closing lid 14 Packaging container main body (box shape)
20 Food

Claims (4)

  In a plastic food storage packaging container that covers the storage port with an open / close lid and is sealed with an adhesive to enclose the stored food, it is affixed to the surface of the adhesive layer until the storage port is sealed. A release paper that is peeled off from the pressure-sensitive adhesive layer when the storage opening is sealed is used, and the release paper contains an anti-deterioration agent, and after peeling from the pressure-sensitive adhesive layer, the food storage container together with the stored food A food storage packaging container which is stored in a container.   The food storage packaging container according to claim 1, wherein the release paper is a polyolefin-based plastic film or sheet containing a drug having a function of preventing deterioration.   The packaging container for food preservation according to claim 1 or 2, wherein the release paper is adhered to a container body or an opening / closing lid at a position inside the container after the storage port is sealed.   In the storage method in which food is stored in a plastic food storage packaging container, the storage port is covered with an opening / closing lid, and sealed with an adhesive, and the food is packaged, the adhesive layer surface until the storage port is sealed As a release paper that is affixed to and peeled off from the pressure-sensitive adhesive layer when the storage opening is sealed, a release paper containing a deterioration-preventing agent is used. A method for preserving food, characterized in that it is stored inside.

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