JPH06390Y2 - Resin packaging container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a resin packaging container for fresh food such as vegetables, fresh fish, meat, etc. The present invention relates to a resin-made packaging container capable of maintaining the shape of the above as much as possible.

[Conventional technology]

2. Description of the Related Art Conventionally, when packaging small fresh food products such as vegetables, fresh fish, and meat (hereinafter simply referred to as small items), the small items are often stacked in a relatively large packaging container and then packaged.
In addition, some storages were made according to the size of these small items, and these small items were put in the storages for packaging.

In addition, these packaging containers are usually formed by secondary molding a sheet obtained by extruding a thermoplastic resin with an extruder, and for improving 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, the mixture is put into an extruder and extruded under heat and pressure, and a foam obtained by extruding into a constant pressure zone from a die attached to the tip of the extruder is It is made by molding next. 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 with various bacteria during transportation and storage. Therefore, in the case where fresh foods of these small items are packed in these packaging containers, the packaging containers are sufficiently sterilized.

Therefore, it is becoming more important that these packaging containers themselves are always sterilized, and recently, antibacterial agents and antibacterial agents that exert their effects by mixing them in resins (films and sheets) or applying them on the surface have been developed. Many fungicides and fungicides have been developed, and some of them are on the market.

[Problems to be solved by the invention]

However, when the above-mentioned small items of fresh food products are stacked and packaged in a relatively large packaging container, these small items may shift to one side due to vibration during transportation,
Also, if the shape of these small items is deformed by hitting the side wall of the packaging container, or if the small items contained in these packaging containers are displayed as products after transportation, they may not look good and the product quality may be bad. There was an inconvenience, such as giving the impression of

In addition, a packaging container provided with a storage unit adapted to the shape of these small items does not have the above-mentioned inconvenience, but the storage amount is limited, and in the case of a product with a low unit price, the packaging container becomes higher. There is a fear.

Further, 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, an elution type, and the antibacterial agent etc. eluted from these resins exerts the antibacterial property. Therefore, the taste of fresh food such as vegetables, fresh fish, and meat may be 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. For this reason, each food-related company is currently forced to make a large investment to maintain the hygiene of fresh food products. We are making every effort. As a part of this, with regard to items brought in from the outside, that is, packaging containers for directly packaging these fresh food products, a great deal 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 obtaining a plastic packaging container that can efficiently store a large amount of small items of fresh food products without deforming its shape or leaning to one side, and that looks good,
Can exhibit antibacterial properties without elution of antibacterial agents, does not decompose antibacterial components even at the temperature required for resin processing, requires a small addition amount, and continues to be used for a long period of time It is an object of the present invention to obtain a resin-made packaging container which does not need to be washed or disinfected before being processed and is well processed.

[Means for Solving the Problems]

The present invention was developed to solve the above problems, and a resin-made packaging container of the present invention comprises a container body,
A partition member made of a flexible material for partitioning and storing the articles arranged in the container body and the partition member made opaque so as not to be easily visible from the outside when mounted on the container body. The lid body, at least the inner surface of the container body and the lid body, the surface of the partitioning material, in a resin packaging container constituted by an antibacterial material mainly consisting of resin and antibacterial zeolite, the antibacterial material, The antibacterial zeolite is 0.1 to 5 relative to the total weight of the thermoplastic resin.
It is composed of a multilayer sheet in which at least one thermoplastic resin sheet is fused or adhered to a sheet in the range of weight%.

Further, the thermoplastic resin is polystyrene, and the antibacterial zeolite is obtained by substituting a part or all of the ion-exchangeable ions in the zeolite with antibacterial metal ions, and the antibacterial zeolite. It is preferable that a part or all of the ion-exchangeable ions in the zeolite are replaced with ammonium ions and antibacterial metal ions, and the antibacterial metal ions are silver, copper or zinc ions. Furthermore, 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 5% by weight based on the total weight of the foaming resin. 5 to 15% by weight of a foaming agent and 0.1 to 5 of the nucleating agent
The foam should be in the range of wt%.

[Action]

According to the resin-made packaging container having the above-described configuration, the partition member made of a flexible material can prevent the product from being shifted to one side due to vibration, etc., and can prevent the shape of the product from being deformed. Since the partitioning material is not visible from the inside, it looks good when the items in the packaging container are displayed.

Further, since the container body, the inner surface of the lid and the surface of the partitioning material are made of the antibacterial material containing the antibacterial zeolite, the inner surface of the packaging container and the surface of the partitioning material due to the sterilizing ions in the antibacterial zeolite. The microorganisms adhering to the can be killed, the inner surface of the packaging container and the surface of the partitioning material can be maintained in a sterile state, and the product can last long.

〔Example〕

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

FIG. 1 is a perspective view of the resin packaging container of the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG. In both figures,
Reference numeral 1 denotes a resin-made packaging container for accommodating small items. The resin-made packaging container 1 comprises a rectangular box-shaped container body 2 and an item 3 which is arranged in the container body 2 and accommodated therein. It comprises a partition member 4 and a lid 5 which is detachably attached to the upper edge 2a of the opening of the container body 2.

The container body 2 is usually made of an opaque resin,
Alternatively, the surface of the resin is made opaque by printing or the like, and is divided by the partition member 4 into the storage portions 2b, 2b. The dimensions of the storage portions 2b, 2b in the width direction are set according to the external dimensions of the product 3, for example, chrysanthemums. The partition member 4 is made of a flexible material such as a sponge so as not to damage the chrysanthemum flower or the like which is the item 3. In addition, this partition member 4
There is a height from the bottom plate 2c of the container body 2 to the upper edge 2a of the opening, and when the lid body 5 is attached to the container body 2, the bottom plate 2C and the lid body 5 prevent the partition member 4 from shifting laterally. become.

The lid 5 is made of a transparent resin, and when mounted on the container body 2, the portion that contacts the partition member 4 is made into a band-shaped opaque portion 5a so that the partition member 4 cannot be easily seen from the outside. Is configured. The opaque portion 5a of the lid 5 is
Made opaque by normal printing. Alternatively, a printed sticker or the like may be attached to the lid 5 to make it opaque. That is, if there is no problem in health and hygiene, the means for making the lid body 5 opaque
It can be anything.

Next, the material characteristics of the resin packaging container 1 of the present invention will be described.

The container body 2, the lid 5, and the partitioning member 4 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 2 and the lid 5 have a slight thickness in order to have rigidity.

As shown in FIG. 3, the antibacterial material of the container body 2, the lid 5 and the partitioning member 4 is mainly composed of a thermoplastic resin 6 and an antibacterial zeolite 7, and the antibacterial material with respect to the total weight of the thermoplastic resin 6 is antibacterial. Of the hydrophobic zeolite 7 in the range of 0.1 to 5% by weight, and a sheet 8 having a thickness of 0.03 mm to 0.1 mm and at least one thermoplastic resin sheet 9 fused or adhered may be a multilayer sheet 10. . With the sheet 8 containing the antibacterial zeolite 7 of the multilayer sheet 10 inside, the box-shaped container body 2 and its lid 5 are molded. Also, sheet 8
Is used as the surface to form the sponge-like partition member 4. The reason why the multilayer sheet 10 is used in this way is to impart antibacterial properties to the inner surfaces of the container body 2 and its lid 5 and the surface of the partitioning member 4, and reduce the amount of antibacterial zeolite 7 used to reduce costs. This is because it is intended. Further, the antibacterial material of the partition member 4 is mainly composed of the thermoplastic resin 6 and the antibacterial zeolite 7, and the antibacterial zeolite 7 may be in the range of 0.15% by weight based on the total weight of the thermoplastic resin 6. .

That is, the partition member 4 may have the same structure as the sheet 8 and may have a sponge shape in order to impart flexibility to the partition member.

The thermoplastic resin 6 can be mixed with the antibacterial zeolite 7 and has properties required as a container for the chrysanthemum flower, which is the product 3, such as a certain degree of heat retention and cold retention, Any material may be used as long as it has rigidity, does not smell or taste chrysanthemums, and has water resistance and no toxicity.

The thermoplastic resin 6 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. , Urea resin, melamine resin, unsaturated polyester resin, rayon, cupra, acetate, triacetate, vinylidene, natural and synthetic rubber, and the like.

Of these thermoplastic resins 6, the container body 2 and the lid 5
Polystyrene (PS) is the most suitable as
Polyethylene, polypropylene, ABS resin, etc. are used. Further, as the partition member 4, polyurethane elastomer, polyethylene, or polyvinyl chloride is suitable.

In the antibacterial zeolite 7, a part or all of the ion-exchangeable ions of natural zeolite or synthetic zeolite may be replaced with an antibacterial metal ion such as silver, copper or zinc (Japanese Patent Laid-Open No. Sho 60). -See the 181002 publication).

That is, zeolite is generally an aluminosilicate having a three-dimensional skeleton structure, and the general formula is XM ² / _n O · Al ₂ O ₃ · Y
It is represented by SiO 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 such a general formula XM ² / _n O ・ Al ₂ O ₃・ YSiO ₂・ ZH ₂ O is 2.6 ^meq / g ~
It is 11.5 ^meq / g. Therefore, the antibacterial zeolite 7
The ion-exchangeable ions are antibacterial metal ions,
For example, it is replaced with silver, copper, zinc or the like. The antibacterial zeolite 7 contains 0.1 to 15% by weight of these antibacterial metal ions in the zeolite from the viewpoint of antibacterial property.
It is desirable that the content is approximately (indicated by weight% on a dry basis at 110 ° C).

The antibacterial zeolite 7 may be natural zeolite or 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 ions are added in this manner is to effectively prevent discoloration of the antibacterial zeolite 7, and it is preferable that the ammonium ions in the antibacterial zeolite 7 are in the range of 0.5 to 2.0% by weight. Further, from the viewpoint of substantially preventing discoloration of the resin 6, the content of the antibacterial zeolite 7 containing the ammonium ion is 0.
It is preferably set to 1 to 3.0%.

Incidentally, the antibacterial properties, durability of antibacterial activity, heat resistance, and safety of these two kinds of antibacterial zeolite 7 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 7 into a glass column having an inner diameter of 22 mm to reduce the volume of the packed bed. 10 ml, tap water 25-30 ml in this column
The antibacterial activity of the antibacterial zeolite 7 is maintained even after passing water at a flow rate of / min and the water quantity of 5000 is passed, and the durability of the antibacterial activity may 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.

In addition, the antibacterial material of the container body 2, the partitioning member 4 and the lid 5 is
As shown in FIG. 4, the foaming resin 6 ', the antibacterial zeolite 7, the foaming agent and the nucleating agent 11 are mainly contained, and the antibacterial zeolite 7 is contained in an amount of 0.1 to 5% by weight based on the total weight of the foaming resin 6'. The foaming agent may be in the range of 5 to 15% by weight, the nucleating agent 11 in the range of 0.1 to 5% by weight, and the foam 12 may be formed. The foam 12 is particularly excellent in heat retention and cold retention, and is lightweight and flexible. The foaming resin 6'is made of polystyrene, polyethylene, ABS resin or the like, the foaming agent is made of CFC 12, butane, propane or pentane, and the nucleating agent 11 is made of talc, for example.
Calcium carbonate and crane are used.

Next, a method of using the resin packaging container 1 having the above structure will be described with reference to FIG.

First, the container body 2 that is stored in a stacked manner is taken out, the partitioning material 4 that is separately stored is arranged in the container body 2, and the container body 2 is divided into storage portions 2b and 2b. 2
Put chrysanthemum flower which is item 3 into b and 2b. Next, the lid body 5 that is also stored in the same manner is taken out, and the lid body 5 is put on the upper edge 2a of the opening of the container body 2 containing chrysanthemums. By doing so, the chrysanthemum flowers are closer to one of them due to the vibration during transportation, or the vibration is absorbed by the partition material 4 of the flexible material, and the shape is not easily deformed, so that a large number of chrysanthemum flowers can be efficiently stored. The appearance is good because the partition member 4 cannot be easily visually observed from the outside.

Further, since the container body 2 lid 5 and the partition member 4 have antibacterial properties, the interior of the resin packaging container 1 is kept aseptic unless they are contaminated by dust or dust. It is not necessary to wash or sterilize the resin-made packaging container 1, and the resin-made packaging container 1 as it is.
You can put chrysanthemums inside.

[Effect of device]

Since the present invention is configured as described above, an article such as a perishable food item does not come close to one side due to the partition member made of a flexible material, and the vibration is absorbed and the shape is not deformed.
Further, due to the opaque portion of the lid, the partitioning material is not visible from the outside, and when the product contained in the packaging container is displayed, it looks good and has the effect of improving the willingness to purchase.

In addition, since the resin packaging container is made up of a multi-layer sheet that is an aseptic material, it is possible to reduce the amount of antibacterial zeolite used, which is economical and does not adhere to various bacteria, and food poisoning occurs due to various bacteria. It has many hygienic effects, such as prevention, and makes the product last longer.

Further, if the resin-made packaging container is made of polystyrene, it will be excellent in workability, durability and cost.

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.

In addition, if the resin packaging container is made of foam, it will be excellent in heat retention and cold retention.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention. FIG. 1 is a perspective view showing a resin packaging container of the present invention, and FIG. 2 is II of FIG.
-A sectional view taken along the line II, Fig. 3, and Fig. 4 are sectional views of an aseptic material, and Fig. 5 is an explanatory view showing a method of using a resin packaging container. 1 ... Resin packaging container 2 ... Container body 3 ... Article 4 ... Partition material 5 ... Lid 5a ... Opaque part 6 ... Thermoplastic resin 6 '... Foaming resin 7 ... Antibacterial zeolite 8 …… Sheet 9 …… Thermoplastic resin sheet 10 …… Multilayer sheet 11 …… Nucleating agent 12 …… Foam

Claims (6)

[Scope of utility model registration request] 1. A container main body, a partitioning member made of a flexible material for partitioning the articles to be placed and stored in the container main body, and only the partitioning member when mounted on the container main body is easier than the outside. A package made of an antibacterial material composed mainly of a resin and an antibacterial zeolite, at least the inner surface of the container body and the lid, and the surface of the partitioning member, which are made opaque so that they cannot be visually observed. In the container, the antibacterial material is a multilayer obtained by fusing or adhering at least one thermoplastic resin sheet to a sheet containing 0.1 to 5% by weight of the antibacterial zeolite with respect to the total weight of the thermoplastic resin. A resin-made packaging container characterized by being a sheet. 2. The resin packaging container according to claim 1, wherein the thermoplastic resin is polystyrene. 3. The resin packaging container according to claim 1 or 2, wherein the antibacterial zeolite has a part or all of the ion-exchangeable ions in the zeolite replaced with antibacterial metal ions. 4. The antibacterial zeolite, wherein part or all of the ion-exchangeable ions in the zeolite are replaced with ammonium ions and antibacterial metal ions (1) or
(2) The resin packaging container described in (2). 5. The resin packaging container according to claim 3 or 4, wherein the antibacterial metal ion is an ion of silver, copper or zinc. 6. 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 resin packaging container according to claim (1), which is a foam in the range of 5 to 5% by weight.