JPH0712283Y2 - Food packaging container that also serves as a display - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a resin packaging container for food products, and in particular, fresh vegetables such as sprout vegetables can be displayed in stores as they are packaged. The present invention relates to a food packaging container that also serves as a display.

[Conventional technology]

Conventionally, a pack-type container for packaging fresh vegetables, such as sprout vegetables, has been stored in a pack-type container as it is and then sealed and displayed in a store or the like. Therefore, they are displayed in a single row with the bottom surface facing downward, or displayed with a slight inclination. In any case, in order to display the entire container horizontally, not only the display space becomes wide, but also the storefront work when displaying is always required to be displayed one by one or repositioned, which improves work efficiency. There were many problems in terms of etc. In addition, these packaging containers are usually prepared by extruding a thermoplastic resin into an extruded sheet with an extruder, and
It is made by next molding. Furthermore, these packaging containers
In order to enhance the heat retention / cooling function, a thermoplastic resin, for example,
A foaming agent and a nucleating agent are added to polystyrene to form a mixture. This mixture is put into an extruder, extruded under heating and pressure, and extruded in a constant pressure zone from a die attached to the tip of the extruder to form a secondary foam. It is made by. The packaging containers made of these thermoplastic resin sheets and foams have passed the PL standard, but do not possess antibacterial properties. For this reason, these packaging containers may be contaminated by various bacteria during transportation and storage. Therefore, in the case where these Japanese confectioneries and the like are packed in these packaging containers, the packaging containers are sufficiently sterilized for hygiene management.

Therefore, it has come to be emphasized that these packaging containers themselves are always sterilized, and recently, an antibacterial agent that exerts its effect by being mixed in a resin (film and sheet) or applied on the surface, Many antifungal agents and fungicides have been developed, and some of them are on the market.

[Problems to be solved by the device]

There is a problem to be solved by the present invention in the point of improving the work efficiency and the display space efficiency as described above. That is, the problem to be solved by the present invention is to form the container main body so that it can be displayed in a vertical state or an inclined state, instead of displaying one by one in a horizontal state as in the conventional display method. is there.

Furthermore, a packaging container having an antibacterial and sterilizing effect by mixing an antibacterial agent in the resin or applying it on the surface is
For example, it is an elution type, and since the antibacterial property is exerted by the antibacterial agent or the like eluted from these resins, there is a possibility that the taste such as the flavor of fresh vegetables such as sprout vegetables is changed. Although the temperature of the resin becomes 250 ° C. or higher due to the processing, the conventional antibacterial agents, especially organic ones, decompose to reduce the antibacterial effect. Furthermore, in order to obtain the prescribed antibacterial activity and sterilization activity, a considerable amount, for example, 2.5% or more of the addition amount is required with respect to the weight of the resin. , The physical properties inherent in the resin are impaired. That is, the transparency, slipperiness, heat seal strength, air permeability, etc. are affected, resulting in problems in the processability.

Due to the above-mentioned problems, a packaging container in which an antibacterial agent is mixed in the resin or coated on the surface is rarely used. Therefore, each food-related company is currently forced to make a large investment to maintain the hygienic condition of food products, and it is necessary to take appropriate measures according to the scale, such as adequate hygiene management for workers and installation of a sterile room. I am trying hard. As a part of this, with respect to items brought in from the outside, that is, packaging containers for directly packaging these food items, a large amount of investment is required for equipment for cleaning and sterilization.

Therefore, the present invention has been made in view of the above circumstances,
With the aim of being able to display fresh vegetables such as sprout vegetables in a vertical state or a tilted state in a display place such as a store as it is in a packaged state, the antibacterial agent can exhibit antibacterial properties without elution, The antibacterial component does not decompose even at the temperature required for resin processing, the addition amount is small, and further, the antibacterial property is long-lasting and it is not necessary to wash or disinfect before use. The purpose is to obtain a resin-made packaging container that is well processed.

[Means for Solving the Problems]

The present invention was developed in order to solve the above-mentioned problems, and the container body 1 and the lid body 6 are integrated by a connecting portion 7, and the bottom portion of the container body 1 is formed into an uneven shape. The lower bottom portion 2 is made deep, and the edge surfaces 5 and 5 of the container body 1 and the lid body 6 corresponding to the lower bottom portion are brought close to the lid body surface 6a side to stand on the lower bottom portion 2 and the edge surfaces 5 and 5. The lid 6 is placed at the same time
Is opened laterally at the connecting portion 7, and the container body 1 and the lid body 6 are mainly composed of a thermoplastic resin and an antibacterial zeolite, and the antibacterial property with respect to the total weight of the thermoplastic resin is Zeolite in a range of 0.1 to 5% by weight is composed of an antibacterial material which is a multilayer sheet obtained by fusing or adhering at least one thermoplastic resin sheet, and the antibacterial material is foamed. It mainly comprises a resin, an antibacterial zeolite, a foaming agent and a nucleating agent, and the antibacterial zeolite is 0.1 to 5% by weight, the blowing agent is 5 to 15% by weight and the nucleating agent based on the total weight of the foaming resin. 0.1 to 5% by weight
It is preferable that the antibacterial zeolite is a foam in which the part or all of the ion-exchangeable ions in the zeolite are replaced by the antibacterial metal ion. Even more preferable are those in which some or all of the ion-exchangeable ions are replaced with ammonium ions and antibacterial metal ions.

And, this antibacterial metal ion is preferably an ion of silver, copper or zinc.

[Operation] According to the above configuration, while keeping the lid sideways open, fresh food is stored in the container body, the lids are closed by aligning both edge surfaces, and the display is placed vertically with the lower bottom portion facing down. In addition, in terms of strength of the container body and lid, a thermoplastic resin sheet is used, and in terms of antibacterial aspect, a sheet containing antibacterial zeolite is used to reduce the amount of antibacterial zeolite used. By the ions having the bactericidal action, the microorganisms adhering to the inner surface of the packaging container can be killed, the inner surface of the packaging container can be maintained in a sterile state, and the food product can last a long time.

Further, even when the antibacterial material is a foam containing antibacterial zeolite, the above-mentioned effects are obtained.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 and FIG. 2 show a food packaging container that also serves as a display according to the present invention, and 1 is the container body. The container body 1 is for packaging resin-made foods, as will be described later, and is integrally formed with the lid body 6. 7 is the connecting portion. The bottom of the container body 1 is formed with three irregularities as shown in the drawing, and the bottom bottom 2, the top bottom 3, and the middle bottom 4 are formed.
It is divided into and. The container body 1 is shown in FIG.
As shown in FIG. 3, the lower bottom portion 2 has a deep bottom, and the edge surfaces 5 and 5 of the container body 1 and the lid body 6 corresponding to the lower bottom portion 2 are covered with the lid body surface 6a.
Since the edge surface 5 is inclined to the side, that is, the edge surface 5 is inclined, the capacity of the container body 1 is increased in the direction from the upper bottom portion 3 to the lower bottom portion 2. The edge surface 5 of the lid body 6 is also formed to be symmetrical with the edge surface 5 of the container body 1. That is, when the both edge surfaces 5 and 5 are combined, they can be combined in a slanted shape as shown in FIG.

Since the present invention is configured in this way, it becomes possible to stand vertically with the lower bottom portion 2 of the container body 1 as the bottom surface, as shown in FIG. It is opened sideways at the part 7.

Next, the material characteristics of the food packaging container that also serves as a display according to the present invention will be described.

The container body 1 and the lid 6 are made of an antibacterial material containing antibacterial zeolite, and the antibacterial material is molded into each shape. The wall thicknesses of the container body 1 and the lid 6 have a slight thickness in order to have rigidity.

As shown in FIG. 3, the antibacterial material of the container body 1 and the lid 6 is mainly composed of a thermoplastic resin 8 and an antibacterial zeolite 9, and the antibacterial zeolite 9 is 0.1% with respect to the total weight of the thermoplastic resin 8. ~ 5% by weight and 0.03mm
It may be a multilayer sheet 12 in which at least one thermoplastic resin sheet 11 is fused or adhered to a sheet 10 having a thickness of 0.1 mm. The box-shaped container body 1 and its lid 6 are formed with the sheet 10 containing the antibacterial zeolite 9 of the multilayer sheet 12 inside. The reason for using the multilayer sheet 12 in this way is to impart antibacterial properties to the container body 1 and the inner surface of the lid body 6 thereof, and to reduce the amount of the antibacterial zeolite 9 used and to reduce the cost.

The thermoplastic resin 8 can be mixed with the antibacterial zeolite 9 and has properties required for a container for fresh vegetables such as sprout vegetables, for example, having a certain degree of heat retention and cold retention, and a certain degree of rigidity. And also has water resistance,
Any substance may be used as long as it is not toxic.

This thermoplastic resin 8 is, for example, polystyrene, polyethylene, polypropylene, polyvinyl chloride, ABS resin,
Nylon, polyester, polyvinylidene chloride, polyamide, polyacetal, polyvinyl alcohol, polycarbonate, acrylic resin, fluororesin, polyurethane elastomer, polyester elastomer, rayon, cupra, acetate, triacetate, vinylidene, natural and synthetic rubber, etc. .

Of these thermoplastic resins 8, the container body 1 and the lid 6
Polystyrene (PS), polyethylene, polypropylene, and ABS resin are the most suitable.

The antibacterial zeolite 9 may be such that some or all of the ion-exchangeable ions of natural zeolite or synthetic zeolite are replaced with antibacterial metal ions such as silver, copper or zinc (Japanese Patent Laid-Open No. Sho 60). -181002 gazette).

That is, the zeolite is generally an aluminosilicate having a three-dimensional skeleton structure, and the general formula is XM ² / _n 0 · Al ₂ O ₃ ·.
It is represented by YSiO ₂ · ZH ₂ O. Here, M represents an ion-exchangeable ion, and is usually a monovalent or divalent metal ion, for example, each ion such as sodium, potassium, magnesium, and iron, n is a valence of a metal ion, and X is a metal oxide. Coefficient, Y is the coefficient of silica, and Z is the number of molecules of water of crystallization. The ion exchange capacity of the zeolite represented by the general formula XM ² / _n 0 · Al ₂ O ₃ · YSiO ₂ · ZH ₂ O is 2.6 ^meq / g ~
It is 11.5 ^meq / g. Therefore, the antibacterial zeolite 9
The ion-exchangeable ions are antibacterial metal ions,
For example, it is replaced with silver, copper, zinc or the like.
In the antibacterial zeolite 9, these antibacterial metal ions are contained in the zeolite in an amount of 0.1 to 15% by weight (110
It is desirable that the content is about (% by weight on a dry basis at 0 ° C).

The antibacterial zeolite 9 may be a natural zeolite or a synthetic zeolite in which some or all of the ion-exchangeable ions are replaced with ammonium ions and antibacterial metal ions (Japanese Patent Application No. 61-290144). Of Priority Claim in Article 42-2, Paragraph 1 of the Japanese Patent Law
(See "Antibacterial Zeolite" filed April 4th). The reason why the ammonium ion is added in this way is to effectively prevent the discoloration of the antibacterial zeolite 9, and the ammonium ion in the antibacterial zeolite 9 is preferably in the range of 0.5 to 2.0% by weight. Further, from the viewpoint of substantially preventing discoloration of the thermoplastic resin 8, it is preferable that the content of the antibacterial zeolite 9 containing the ammonium ion in the thermoplastic resin 8 is 0.1 to 3.0%. .

The antibacterial properties, durability of antibacterial activity, heat resistance, and safety of these two kinds of antibacterial zeolite 9 are described in detail in these publications or application examples. That is, the antibacterial activity was reconfirmed by an antibacterial activity test as described later, and the durability of the antibacterial activity was confirmed by uniformly packing the antibacterial zeolite 9 into a glass column having an inner diameter of 22 mm and adjusting the volume of the packed bed. 10 ml, tap water 25-30 ml in this column
The antibacterial activity of the antibacterial zeolite 9 after passing water at a flow rate of / min and the water quantity of 5000 l is still maintained, and the antibacterial activity can be said to be semi-permanent. In addition, it can withstand heat up to 550 ° C, and has also passed safety tests such as antibacterial metal elution tests.

Further, as shown in FIG. 4, the antibacterial material of the container body 1 and the lid body 6 is mainly composed of a foaming resin 8 ', an antibacterial zeolite 9, a foaming agent and a nucleating agent 13, and the total amount of the foaming resin 8'is The antibacterial zeolite 9 may be in the range of 0.1 to 5% by weight, the blowing agent may be in the range of 5 to 15% by weight, and the nucleating agent 13 may be in the range of 0.1 to 5% by weight, and the foam 14 may be formed. This foam
14 has excellent heat and cold insulation properties and is lightweight. The foaming resin 8'is made of polystyrene, polyethylene, ABS resin or the like, the foaming agent is made of CFC 12, butane, propane or bentane, and the nucleating agent 13 is made of talc or calcium carbonate. And clay is used.

Further, since the container body 1 and the lid body 6 have antibacterial properties, the interior of the container body 1 is kept aseptic unless they are contaminated by dust, dust or the like.
It is not necessary to wash or sterilize the soybeans, and fresh vegetables such as sprout vegetables can be put in the container body 1 as it is.

It should be noted that although the present embodiment describes fresh vegetables such as sprout vegetables, it is needless to say that the same effect can be obtained even when used as a packaging container for other foods.

[Effect of device]

INDUSTRIAL APPLICABILITY Since the present invention is configured as described above, it is possible to display fresh vegetables such as sprout vegetables in the packaging container as they are, and also to display them vertically, and in that state, the lid body Since the doors are opened sideways, work efficiency and display space can be improved. Furthermore, since a multilayer sheet containing antibacterial zeolite is used, a thermoplastic resin sheet is used in terms of strength, and an antibacterial zeolite that is expensive in terms of antibacterial ability is used in correspondence with a sheet containing antibacterial zeolite. By reducing the amount of zeolite used, along with the purpose of a packaging container that requires a low price, not only bacteria do not adhere, it also has many effects in hygiene such as the prevention of food poisoning due to bacteria, and , Make the goods last longer.

Also, even if a packaging container is made of a foam containing antibacterial zeolite, the same effect as described above can be obtained, and in addition, it has excellent heat retention and cold retention.

In addition, the antibacterial zeolite may be one in which some or all of the ion-exchangeable ions in the zeolite are replaced with antibacterial metal ions, whereby the taste of the product is not changed and there is no toxicity. The effect lasts semipermanently, is strong against heat, and its addition amount is small. By adding this antibacterial zeolite, the processability is good and the economy can be maintained without impairing the physical properties of the resin.

Further, an antibacterial zeolite obtained by substituting a part or all of the ion-exchangeable ions in the zeolite with ammonium ions and antibacterial metal ions is more preferable because it does not discolor.

Further, when the antibacterial metal ion is silver, copper or zinc, the antibacterial activity is further enhanced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a food packaging container that also serves as a display according to the present invention, and FIG. 2 is a perspective view and a sectional view showing a usage state of the packaging container according to the present invention shown in FIG. 1, and FIG. 4 and FIG. 4 are partial sectional views of the packaging container showing the antibacterial material of the present invention. 1 ... Container main body, 2 ... bottom bottom part, 3 ... top bottom part, 4 ... middle bottom part, 5 ... edge surface, 6 ... cover body 6a ... cover body surface, 7 ... connecting part, 8 ... thermoplastic Resin, 8 '... Foaming resin 9 ... Antibacterial zeolite, 10 ... Sheet 11 ... Thermoplastic resin sheet, 12 ... Multi-layer sheet 13 ... Nucleating agent, 14 ... Foam

Claims (5)

[Scope of utility model registration request] 1. A container main body 1 and a lid 6 are integrated at a connecting portion 7, a bottom portion of the container main body 1 is formed in a concavo-convex shape, and a lower bottom portion 2 has a deep bottom so as to correspond to the lower bottom portion. The edge surfaces 5 and 5 of the container body 1 and the lid body 6 are brought close to the lid body surface 6a side, and the lower bottom portion 2 and the edge surfaces 5 and 5 are set upright and the lid body 6 is connected to the connecting portion 7. And the container body 1 and the lid 6 are mainly composed of a thermoplastic resin and an antibacterial zeolite, and the antibacterial zeolite is 0.1 to 5 weight relative to the total weight of the thermoplastic resin. A food packaging container that also serves as a display, characterized in that it is composed of an antibacterial material that is a multi-layer sheet in which at least one thermoplastic resin sheet is fused or adhered to a sheet in the range of%. 2. The antibacterial material is mainly composed of a foaming resin, an antibacterial zeolite, a foaming agent and a nucleating agent, and the antibacterial zeolite is contained in an amount of 0.1 to 0.1 with respect to the total weight of the foaming resin.
5% by weight, 5 to 15% by weight of the foaming agent and 0.
The food packaging container for display and combination use according to claim 1, which is a foam in the range of 1 to 5% by weight. 3. The food packaging container for display and combination use according to claim 1, wherein the antibacterial zeolite has a part or all of the ion-exchangeable ions in the zeolite replaced with antibacterial metal ions. 4. The food for display and display according to claim 1, wherein the antibacterial zeolite has a part or all of the ion-exchangeable ions in the zeolite replaced with ammonium ions and antibacterial metal ions. Packaging container. 5. The food packaging container that also serves as a display, according to claim 3 or 4, wherein the antibacterial metal ion is an ion of silver, copper or zinc.