JPH11170444A - Packaging body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging body for keeping the good degree of freshness of a content and other products interfering a packaging body on the inner side and outer side of the packaging body by the antibacterial action of an antibacterial substance. SOLUTION: An intermediate layer formed of a plastic sheet (b) of a packaging body A formed by laminating an outermost layer 1 and an innermost layer 2 formed of plastic films through a bonding layer forming the intermediate layer 3 is formed of a plastic film in which a 0.1 wt.% antibacterial substance 4 composed of a thiazolyl sulfamide compound is mixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package capable of protecting foods and fresh foods from bacteria for long-term storage.

[0002]

2. Description of the Related Art Conventionally, the freshness of food as a content is maintained by using a film in which an antibacterial zeolite or the like is mixed on the inner surface of a packaging material of a container containing food, that is, the innermost layer in contact with the food. I was measuring.

[0003] This packaging material exhibits antibacterial properties when it comes into contact with the contents, and has almost no antibacterial action when it is not in contact with the film surface or with articles outside the packaging material. There was no effect.

[0004] However, in the current perishable food industry,
As well as preserving the freshness of the packaged contents, antibacterial properties on the surface of the goods touched by workers and buyers, and on other goods that come into contact with the goods, at the display of the goods at stores, etc. It has also been strongly desired to demonstrate it.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned demands, and is a package formed of a plastic sheet in which an outermost layer and an innermost layer made of a plastic film are laminated with an adhesive layer serving as an intermediate layer. The intermediate layer of the body is formed of a plastic film in which an antibacterial substance comprising a thiazolyl sulfamide compound is mixed in an amount of 0.1% by weight to 1.0% by weight. It is an object of the present invention to provide a package capable of maintaining the freshness of contents and other articles that interfere with the contents on the inside and outside.

[0006]

According to the present invention, there is provided a plastic sheet formed by laminating an outermost layer and an innermost layer of a plastic film with an adhesive layer as an intermediate layer. In the package, the intermediate layer has a configuration of a package made of a plastic film mixed with an antibacterial substance.

A package formed of a plastic sheet in which an outermost layer and an innermost layer made of a plastic film are laminated by an adhesive layer serving as an intermediate layer, wherein the intermediate layer contains an antibacterial substance mixed therein. The antimicrobial substance is a thiazolyl sulfamide compound, and is 0.1 wt% to
It is in the configuration of a package in which 1.0% by weight is mixed.

Further, in a package formed by a plastic sheet laminated in multiple layers with a plastic film, at least one of the multiple layers is made of a plastic film mixed with an antibacterial substance, The substance is a thiazolyl sulfamide compound, and is in the configuration of a package in which 0.1 to 1.0% by weight is mixed with the intermediate layer.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a package according to the present invention will be described with reference to the drawings.

In FIG. 1 to FIG. 3, A is a package, at least an outermost layer 1 and an innermost layer 2 made of a plastic film.
2 is formed by a plastic sheet b in which a plurality of layers are laminated by an adhesive layer 3 as an intermediate layer.
It is adopted in an arbitrary container such as a bag shape as shown in FIG. 2A, a box shape as shown in FIG. 2B, and a bottle shape as shown in FIG. 2C.

In this embodiment, an example of a package A formed in a bag shape as shown in FIG. 2A will be described. The outermost layer 1 is a substrate film, and is made of nylon or polyester. It is formed into a thickness of 12 to 25 μ using the method described above.

The innermost layer 2 serves as a sealant layer at the time of bag making, and is made of a material such as linear polyethylene, polyethylene, polyethylene mixed with vinyl acetate, polypropylene, or the like.
Molded to a thickness of ~ 60μ.

The intermediate layer 3 is made of a plastic film in which an antibacterial substance 4 is mixed.
It becomes an adhesive layer when the outermost layer 1 and the innermost layer 2 are laminated, and is formed of polyethylene or the like to a thickness of 15 to 30 μm.

The antibacterial substance 4 is a thiazolyl sulfamide compound, which is present in an amount of 0.1% to 1.0% by weight based on the total weight of the intermediate layer 3. A pellet or liquid is blended with the polyethylene or the like to form a film. The intermediate layer 3 is laminated with the outermost layer 1 and the innermost layer 2 by copolymerization extrusion molding or the like. Molded.

As a result, the antibacterial substance 4 penetrates the film layer and exerts its antibacterial action inside the package A,
The antibacterial action is applied to the outside of the package A, and the antibacterial action acts on the outside of the package A. For example, when a fresh product is accommodated in a tray and wrapped and packed, Package A of seasoning liquid and spices attached to the product
Can be sterilized even if an operator handles the product with bare hands.

The package A is also used for fresh products in the tray.
By storing this, the antibacterial action works from the package A, and the freshness of the fresh product can be maintained for a long period of time.

Further, when the package A is wrapped with a cooling material as its contents, the cooling effect and the antibacterial substance 4
The freshness can be further maintained by a synergistic effect with the antibacterial action of the present invention, and a sterilizing action can be performed at the time of distribution or display of fresh products.

In particular, the cold insulator made of the package A using the plastic sheet b having the antibacterial substance 4 has an antibacterial effect on both the inner and outer surfaces, so that not only the outer surface which may come into contact with food but also the inner surface is provided. On the other hand, it acts on the gel body and water as its contents, and can suppress the growth of bacteria, so that it is not necessary to take preservative measures, such as a preservative, on the contents.

The content of the antibacterial substance 4 is as follows:
If it is less than 0.1% by weight, the antibacterial effect is weak, and
If the content is more than 5% by weight, the antibacterial substance 4 itself is expensive, so that the molding cost of the plastic sheet b rises, and is preferably 0.5% by weight.

As shown in FIG. 3A, the antibacterial substance 4 is the outermost layer 1 and the outermost layer 1 shown in FIG. As shown in (b), the innermost layer 2 (in the case of three or more layers, the outermost layer 1, the innermost layer 2 and the intermediate layer 3
Also applies to layers between. ) Can also be mixed.

By providing a layer in which the antibacterial substance 4 is mixed in the intermediate layer 3, the thickness of the layer can be set arbitrarily. The antimicrobial effect can be appropriately adjusted.

Further, the intermediate layer 3 having the antibacterial substance 4
Is an adhesive layer, so that the layers 1 and 2 can be selected without affecting the types of the outermost layer 1 and the innermost layer 2.
When the antibacterial substance 4 is mixed in the innermost layer 2, the versatility is inferior because the use of these layers 1 and 2 is limited.

Example 1 The outermost layer 1 serving as a base material has a thickness of 15 μm of nylon, the innermost layer 2 serving as a sealant layer has a thickness of 40 μm of polyethylene, and the intermediate layer 3 serving as an adhesive layer has a thiazolyl sulfamide as an antibacterial substance. A plastic sheet b was prepared by co-extrusion of polyethylene 20 having a thickness μ of a blend of the compound 4 and 0.5% by weight.

Using this plastic sheet b, a three-sided bag was made by heat sealing, a piece of bread was stored inside, and the opening was heat sealed.

(Comparative Example 1) The outermost layer serving as a base material has a thickness of 15 μm for nylon, the innermost layer serving as a sealant layer has a thickness of 40 μm for polyethylene, and the intermediate layer serving as an adhesive layer has 20 μm for polyethylene.
A plastic sheet was prepared by a co-extrusion method.

Using this plastic sheet, a three-sided bag was made by heat sealing, and a piece of bread was accommodated therein and the opening was heat sealed.

When these (Example 1) and (Comparative Example 1) were allowed to stand at room temperature for four weeks to observe the occurrence of mold,
The results shown in Table 1 were obtained.

[0028]

As described above, in the case of Example 1, no mold was observed even after the fourth week.

(Example 2) A plastic sheet b was prepared according to Example 1, and a three-sided bag was formed by heat sealing using the plastic sheet b.

(Comparative Example 2) A plastic sheet was prepared according to Comparative Example 1, and a three-sided bag was formed by heat sealing using the plastic sheet.

These (Example 2) and (Comparative Example 2)
Without performing the boiling process prescribed by the law at the time of producing baked pork or immediately before shipping the product, immediately after the bagging and 2
The number of bacteria after 4 hours was measured, and the results are shown in Table 2 below.

[0033]

According to the above, it was confirmed that the number of bacteria in Example 2 was significantly reduced after 24 hours.

That is, during the production of baked pork, it was necessary to pack in a bag after cooking, degas, and sterilize by boiling for 15 to 20 minutes.
The use of the package of Example 2 eliminated the environment in which bacteria proliferated, so that sterilization by boiling was not required, and the taste change caused by the sterilization by boiling was eliminated.

This is effective in packaging and storing various foods that change in taste due to reheating after cooking.

[0037]

As described above, in the package of the present invention, since the antibacterial substance is mixed in the sheet formed into a multilayer, the package is formed by this sheet and the contents are contained therein. Sometimes, the antibacterial action works not only on the contents inside but also on the outside of the package, so that the freshness of the contents can be measured and the antibacterial action also works on other articles that interfere with this package. This provides a special effect that the freshness can be maintained around the package.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing one embodiment of a package according to the present invention.

FIG. 2 is a perspective view showing each example of a use application of the package in FIG.

FIG. 3 is a partial cross-sectional view showing another mixed example of the antibacterial substance of the package according to the present invention.

[Explanation of symbols]

 A package b plastic sheet 1 outermost layer 2 innermost layer 3 middle layer 4 antibacterial substance

Claims (3)

[Claims] 1. A package formed by a plastic sheet in which an outermost layer and an innermost layer made of a plastic film are laminated by an adhesive layer serving as an intermediate layer, wherein the intermediate layer contains an antibacterial substance mixed therein. A package comprising a plastic film. 2. A package formed by a plastic sheet in which an outermost layer and an innermost layer made of a plastic film are laminated by an adhesive layer serving as an intermediate layer, wherein the intermediate layer contains an antibacterial substance. A package comprising a plastic film, wherein the antibacterial substance is a thiazolyl sulfamide compound, and 0.1 to 1.0% by weight of the intermediate layer is mixed. 3. A package formed by a plastic sheet laminated in multiple layers with a plastic film, wherein at least one of the multiple layers is made of a plastic film mixed with an antimicrobial substance, The package is characterized in that the substance is a thiazolyl sulfamide compound, and 0.1 to 1.0% by weight of the intermediate layer is mixed.