JP2000168834A - Bag-in-box internal container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent degradation of a content caused by oxygen by providing an inner container of a multiple or multi-layered structure, and arranging a deoxidizing means between plastic films to form the inner container to effectively and easily remove the outside air and oxygen in a head space. SOLUTION: An inner container of double structure is stored inside an outer container 7, and a small bag packaging a deoxidizing agent 2 as a deoxidizing means is attached using an adhesive tape 3 between an outer-layer film 10 and an inner-layer film 11. The deoxidizing agent 2 can be attached not only by the adhesive tape, but also with an adhesive or by thermal fusion. The deoxidizing agent 2 is arranged on an upper surface of bag-in-box to efficiently remove oxygen in a head space not in contact with a content. In addition, invasion of oxygen from the outside, and degradation of the capacity of the deoxidizing agent 2 are prevented by setting the total oxygen permeability of the outer plastic film 10 outside the deoxidizing agent 2 to be smaller than the total oxygen permeability of the inner plastic film 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag-in-box inner container used for a liquid container, and more particularly to a bag-in-box inner container provided with a deoxygenating means to prevent oxidative deterioration of contents.

[0002]

2. Description of the Related Art Conventionally, a bag in box (hereinafter referred to as BIB) is used as one of liquid containers.
There is. BIB is a packaging container in which an inner container formed of a single-layer or laminated film or sheet (hereinafter, simply referred to as a film) is accommodated in an outer container such as a cardboard box, for example, sake, wine, juice, soy sauce. Such foods are widely used as packaging containers for industrial products such as agricultural chemicals, detergents, adhesives, fragrances, and developing solutions.
If the contents contained in the inner container are easily deteriorated by oxygen in the air, in order to prevent this, nylon or polyvinylidene chloride (P) is used as the inner container film.
VDC) coated nylon, saponified ethylene-vinyl acetate copolymer (EVOH), aluminized polyester (P
ET) Plastic films having high oxygen barrier properties such as films are used.

[0003] In addition, due to the characteristics of BIB, it is necessary to seal the inner container while a certain amount of air is present in the inner container at the time of filling, and the air in the head space touches the inner container to promote the deterioration of the inner container. There was something to do. In order to remove the influence of oxygen in the inner container, a method of introducing a deoxidizer mainly containing iron powder or the like packed in a small bag made of a porous film into the inner container is considered. In the method, there is a problem that the sachet containing the oxygen absorber directly touches the contents of the liquid, which is not preferable in terms of hygiene, and that the liquid gets wet with the oxygen absorber and the oxygen absorbing performance is lost. .

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a BIB inner container with which external air and oxygen in a head space are removed. An object of the present invention is to provide a BIB inner container that is effectively and easily removed.

[0005]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a bag-in-box in which the inner container has a multi-layer or multi-layer structure and deoxygenating means is provided between the plastic films constituting the inner container. It is an inner container. That is, in the ordinary BIB, the inner container may have a double structure or a triple structure from the viewpoint of liquid leakage or oxygen permeability, or may have a multilayer structure in order to reduce oxygen permeability. In the inner container of the present invention, the deoxidizing means is provided between the plastic films of the inner container, and the setting of the deoxidizing means can be easily set when the inner container is prepared. There is no need to add a deoxidizer at the time of filling. In addition, since the deoxygenating means does not directly touch the contents in the BIB, the performance of the deoxygenating means does not decrease and it is very sanitary. Furthermore, when this inner container is stored in an outer container, the oxygen in the head space in the container can be effectively removed by installing the deoxidizing means at least at a position corresponding to the upper surface,
The contents can be stored for a long time. As such a deoxidizing means, in addition to the above-described deoxidizing agent, a known one such as a method in which a component having a deoxidizing function is directly applied to a plastic film constituting an inner container, or a method in which the component is laminated, is used. Applicable.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An inner container of a BIB according to the present invention comprises:
It may be a bag-like or molded one. These inner containers are made of a plastic film, and have a multi-layer structure of two or more layers or a multi-layer structure of two or more layers. As the plastic film constituting the multilayer structure, either a single-layer film or a laminated film may be used. In the case of a single-layer film, a heat-adhesive film such as polyethylene or polypropylene is used.In the case of a laminated film, the above-mentioned polyolefin is used as a heat-adhesive layer, and biaxially oriented polyester, biaxially oriented nylon, biaxially oriented polypropylene, ethylene -A laminated film obtained by laminating a saponified vinyl acetate copolymer (EVOH), an aluminum vapor-deposited polyester film, or the like. Examples of the film constituting the multilayer structure include those obtained by co-extruding the above-mentioned heat-adhesive film with nylon, EVOH, or the like. The outer container for storing the inner container is used to prevent external impact and to maintain a certain shape as a BIB, and any of those used as a known BIB outer container can be used. For example, a cardboard case, a plastic case, a carton, a plywood or the like is used.

The deoxidizing means is provided between the films of the inner container having a multi-layer or multi-layer structure so as to remove oxygen from the inner container after filling. When the deoxygenating means is installed between the films of the inner container, it can be set at the time of preparing the inner container, and it may be performed by adhesion, adhesion or heat welding to the film. When the inner container has a multilayer structure, a resin containing a substance having a deoxidizing function may be co-extruded. As the position to install the deoxygenation means,
BIB in the sense of removing oxygen from the headspace
In this case, it is preferable to arrange at a position corresponding to the upper surface of the inner container of the BIB, and the total oxygen permeability of the outer plastic film is equal to the total oxygen permeability of the inner plastic film from the position where the deoxidizing means is installed. Preferably, it is smaller than the amount. This effectively prevents a decrease in the capacity of the deoxidizing means due to the intrusion of oxygen from the outside air, and uses a film having a high oxygen permeability for the inner (inner side) inner container film. Oxygen in the space can be effectively removed.

The present invention will be described more specifically with reference to the drawings. FIG. 1 is a cross-sectional view of a BIB accommodating an inner container having a multiplex structure according to the present invention, and FIG. 2 is a cross-sectional view of an installation portion of a deoxygenating means. In the drawing, an inner container having a double structure is housed inside an outer container 7, and a small bag in which an oxygen scavenger 2 is packaged as an oxygen scavenger between an outer film 10 and an inner film 11 is adhered. It is installed by a tape 3. As an installation method of the deoxidizing means, in addition to the adhesion using the adhesive tape, it can be performed by an adhesive or an adhesive or by heat welding (heat sealing). The position of the deoxidizing means 2 is provided on the upper surface of the BIB, so that oxygen in the head space can be effectively removed without contacting the contents. Then, the total oxygen permeability of the plastic film 10 outside the oxygen absorber 2 is smaller than the total oxygen permeability of the plastic film 11 inside, so that the performance of the oxygen scavenging means is reduced due to the intrusion of oxygen from the outside air. It can be effectively prevented.

FIG. 3 is a cross-sectional view of a BIB accommodating a multi-layered inner container according to the present invention, and FIG. 4 is a cross-sectional view of a laminated film having a deoxidizing function constituting the inner container. In the drawing, an inner container made of the above-mentioned laminated film is housed inside an outer container 7. The laminated film has a heat-adhesive resin layer 12 such as polyethylene as the innermost layer.
, A resin layer 13 containing a substance having a deoxygenating function on the outside thereof, and an air-proof layer 1 such as nylon or EVOH.
4 and the heat-adhesive resin layer 15 in this order. The resin layer having a deoxidizing function is, for example, a thermoplastic resin film in which a deoxidizing composition is dispersed in a film. In the inner container made of such a laminated film, oxygen in the container can effectively remove oxygen in the head space by the resin layer 13 containing a substance having a deoxidizing function. Further, since an air-proof layer 14 such as a nylon or EVOH layer is laminated on the outside, it is possible to effectively prevent oxygen from entering from the outside.

[0010]

As described above, according to the present invention, an oxygen scavenger can be set in advance in the inner container of the liquid BIB, and the user can simply fill the inner container with the contents. Therefore, it can be used as a container having a high performance of preventing deterioration of contents by oxygen.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a bag-in-box container with an oxygen scavenger according to the present invention.

FIG. 2 is a sectional view of a set portion of the oxygen scavenger of FIG. 1;

FIG. 3 is a cross-sectional view of another bag-in-box container having a deoxidizing function according to the present invention.

FIG. 4 is a sectional view of a laminated film constituting the inner container of FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 BIB 2 Oxygen scavenger 3 Adhesive tape 4 Injection port 5 Seal part 6 Cap 7 Outer container
8 Inner solution 9 Headspace 10 Outer film 1
REFERENCE SIGNS LIST 1 inner film 12 thermoadhesive resin layer 13 resin layer containing a substance having a deoxidizing function 14 airproof layer 15 thermoadhesive resin layer

Claims (3)

[Claims] 1. A bag-in-box inner container wherein the inner container has a multi-layer or multi-layer structure, and deoxygenating means is provided between plastic films constituting the inner container. 2. The bag-in-box inner container according to claim 1, wherein a total oxygen permeability of the outer plastic film is smaller than a total oxygen permeability of the inner plastic film with respect to the deoxidizing means. 3. The bag-in-box container according to claim 1, wherein when stored in an outer container, a deoxygenating means is provided between the plastic films at least at a position corresponding to the upper surface. .