JPH07257643A - Double-bag body for packing - Google Patents

Abstract

PURPOSE:To contain spit-food or packing articles having sharp edges, prevent pinhole defects brought by the spit fronts or the sharp edges in the contained articles as much as possible and further, prevent a lowering of packing function in a distribution process. CONSTITUTION:A double-bag for packing is composed of an external bag body 2 and an internal bag body 3. The external bag body is made of a sheet material 4 forming the external bag, which is provided with a thermoplastic resin layer 6 on one of faces of a basic film 5 and which can be heat-sealed. The internal bag body 3 is made of a sheet material 7 forming the thermoplastic resin internal bag. Both external and internal bags are unified together by a side heat-seal 9 positioned oppositely. These bags are provided with a sealing edge and an opening edge crossing at the heat-seal parts, respectively. The sealing edge in the internal bag is positioned at the distance L4 from the sealing edge in the external bag. After an article is contained in the internal bag, the opening edges of the external and internal bags are heat-sealed together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention accommodates, for example, skewered foods or packaged items having sharp edges, and pinhole defects caused by skewers or sharp edges in those items are possible. The present invention relates to a double bag for packaging having a novel structure for preventing the deterioration of the packaging function in the distribution process.

[0002]

BACKGROUND OF THE INVENTION As is well known, skewered yakitori food, skewered dumpling food and other skewered food are packaged in a state in which a solid food material is stabbed in a skewered body having a sharp end, and then provided for distribution. ing. When packaging such skewered foods, a particular problem is that after the packaging, in the distribution process, the sharp skewers of the skewers often break through the packaging bag, reducing the packaging function. Is to let it. Further, even in the case of packaging processing such as grilled fish or Chinese herb raw material having a sharp end portion in itself, after packaging, in the distribution process, the packaging bag body has a sharp end portion. There was a big problem that it was breached, and like the above, the packaging function was deteriorated.

[0003] Conventionally, in the case of carrying out the packaging processing of the special packaged items as described above, in order to solve the above-mentioned problems, a tray member is separately prepared and the packaged items are stored in the tray member. There is provided a structure in which this is put in a packaging bag and packaged. However, such a packaging structure using a tray member is economically unreasonable because the packaging bag and the tray member must be prepared in advance. Has a lot of problems such as being bulky, and further, it has a problem of dust after use, especially regarding disposal of the tray member.

[0004]

Therefore, the present invention is
Under the circumstances as described above, in a packaging bag for storing skewered food or a packaged item having a sharp end, a pinhole defect due to a skewered point or a sharp edge in the item. The present invention aims to provide a double bag for packaging having a novel structure, which prevents the deterioration of the packaging function in the distribution process as much as possible.

Further, the present invention is intended to solve the economical irrationality, enable compact packaging matching the size of the package contents, and solve the problem of bulky packaging. Further, the present invention provides a double bag for packaging which has a novel structure that is effectively adapted to the disposal treatment after the use of the packaging bag and responds to the dust problem which has been pointed out as a major problem in the past. Especially.

[0006]

In order to achieve the above-mentioned object, the present invention specifically provides a double bag for packaging comprising an outer bag and an inner bag, wherein the outer bag is Is equipped with a thermoplastic resin layer on one surface of the base film,
The outer bag forming sheet material heat-sealable through the thermoplastic resin layer, the inner bag is made of a thermoplastic resin inner bag forming sheet material, the outer bag and the inner bag is , Integrally heat-sealed along opposite side heat seal lines, wherein the outer bag body and the inner bag body each have a sealing edge crossing the side heat seal line, and the sealing bag. With an opening edge facing the toe edge, the sealing edge in the inner bag body,
Located inside the outer bag body at a distance L ₄ from the inner edge of the sealing end of the outer bag body, after storing the stored items in the inner bag body, the openings of the outer bag body and the inner bag body (EN) A packaging double bag whose edges can be integrally heat-sealed.

Further, in the present invention, in a specific example thereof, a double bag for packaging is constructed in which an opening edge of the inner bag protrudes outward from an opening edge of the outer bag, and further, the outer bag. The body and the inner bag form a double bag for packaging in which the inner surface of the outer bag and the outer surface of the inner bag are heat-sealed in a dot shape along the opening edge.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The double bag for packaging according to the present invention will be described below in detail with reference to specific embodiments shown in the drawings. 1 and 2 show a specific embodiment of a double bag for packaging according to the present invention, in which two outer bag forming sheet materials and a tubular inner side having a folding edge are provided. FIG. 1A is an example in which the bag forming sheet material forms a double bag for packaging in which the opening edge of the inner bag protrudes more outward than the opening edge of the outer bag.
[Fig. 1] is a schematic perspective view showing a combination mode of two outer bag forming sheet materials and a tubular inner bag forming sheet material having a fold edge, and Fig. 1B shows them in a superposed state. It is a schematic perspective view which shows an aspect.

Next, FIG. 2A is a schematic plan view showing a mode in which the sheet materials are superposed on each other as shown in FIG. 1B, and the superposed sheet materials are heat-sealed. 2C is a schematic plan view showing a mode in which a double bag for packaging according to the present invention is cut along a cutting line, and a virtual mode in which a skewered food is stored therein, and FIG. 2C is 2C is a schematic enlarged cross-sectional view showing a 2C-2C line portion in FIG. 2B in a cross section, and FIG. 2D is a schematic enlarged cross-sectional view showing a 2D-2D line portion in FIG. 2B in a cross section.

On the other hand, FIG. 3 shows another embodiment of the double bag for packaging according to the present invention, in which two outer bag forming sheet materials and a tubular inner side having folding edges are provided. FIG. 3A shows an example in which a bag-forming sheet material is used to form a double bag for packaging that is suitable for two-way take-up, and FIG. 3A shows two outer bag-forming sheet materials and a tube having folding edges. FIG. 3B is a schematic perspective view showing a mode in which a sheet-shaped inner bag forming sheet material is superposed, heat-sealed, and then cut, and FIG. 3B is cut along a cutting line to form an outer bag and an inner bag. It is a schematic perspective view showing an example of a packaging double bag formed by heat-sealing dot-shaped points between the inner surface of the outer bag and the outer surface of the inner bag along the opening edge of the body. .

The double bag 1 for packaging according to the present invention is basically composed of an outer bag 2 and an inner bag 3. In the present invention, the outer bag body 2 is the base film 5
A thermoplastic resin layer 6 is provided on one surface of the inner bag body 3, and the inner bag body 3 is formed of an outer bag body forming sheet material 4 that can be heat-sealed via the thermoplastic resin layer 6.
The inner bag forming sheet material 7 made of a thermoplastic resin is used.

The double bag 1 for packaging according to the present invention can be applied to two kinds of applications, that is, general food applications (boil, frozen, etc.) and retort food applications, and an outer bag body is formed according to each application. Sheet material 4 and inner bag forming sheet material 7
Are selected from the materials listed below.

First, general food applications (boil, frozen, etc.)
In the case of, the outer bag forming sheet material 4 for the outer bag 2 is, as the base film 5, stretched polypropylene, polyethylene terephthalate, stretched nylon, unstretched nylon, and polyvinylidene chloride coat or aluminum on these films. Vapor-deposited film, co-extruded barrier stretched nylon, polyvinyl alcohol film, ethylene-vinyl alcohol copolymer film, silicon oxide vapor-deposited polyethylene terephthalate film, aluminum foil, etc. Any of the films having a thickness of about 8 to 80 μm, preferably 12 to 60 μm.
It is about μ.

A thermoplastic resin layer 6 formed on one surface of the base film 5 of the outer bag forming sheet material 4,
In addition, as the inner bag forming sheet material 7, low density polyethylene (LDPE), ethylene-vinyl acetate copolymer (EVA: Ethylene Vinyl a
cetate copolymer: 2-15%, Ionom
er), ethylene-acrylic acid copolymer (EAA: Ethyle
ne Acrylic acid copolymer), linear low density polyethylen (L-LDPE)
e: C _{4 to} C ₈ ), unstretched polypropylene (CPP: casted
polypropylene), and the thickness dimension is about 10 to 150 μm, preferably 30
˜100 μ.

Next, in the case of retort food use, the outer bag forming sheet material 4 for the outer bag 2 is made of polyethylene terephthalate, stretched nylon, non-stretched nylon, and poly-polyethylene resin as the base film 5. Vinylidene chloride coated film, co-extruded barrier stretched nylon, ethylene-vinyl alcohol copolymer film, silicon oxide vapor-deposited polyethylene terephthalate film, aluminum foil, etc.
It is one of the composite films laminated with each other and has a thickness of about 8 to 80 μm, preferably about 12 to 60 μm.

A thermoplastic resin layer 6 formed on one surface of the base film 5 in the outer bag forming sheet material 4,
As the inner bag forming sheet material 7, high density polyethylene (HDPE) and linear low density polyethylene (L-LDPE: linear low) are used.
density polyethylene: C _{4 to} C ₈ ), unstretched polypropylene for retort (CPP: casted polypropylene), having a thickness of 10 to 200 μm.
It is of the order of magnitude, and preferably of the order of 50 to 150 μ.

Then, the double bag 1 for packaging according to the present invention.
With reference to FIGS. 1 and 2, an example of the outline of the manufacturing procedure will be described. Two outer bag forming sheet materials 4 and 4 having a thermoplastic resin layer 6 on one surface of the base film 5, and a tubular inner bag forming sheet material 7 having a folding edge made of a thermoplastic resin. As shown in FIG. 1A, two outer bag forming sheet materials 4 and 4 are arranged so that the thermoplastic resin layer 6 is on the inner side, and a tubular inner bag forming sheet material is provided therebetween. 7 are arranged and overlapped in the manner as shown in FIG. 1B.

In this case, one folding edge 7a of the tubular inner bag-forming sheet material 7 is located at a position L ₁ inward from the end edge 4a of the outer bag-forming sheet material 4,
The other folding edge 7b of the tubular inner bag body forming sheet material 7 has a dimension L from the end edge 4b of the outer bag body forming sheet material 4.
It is set to take a position protruding by ₂ . In the case of this embodiment, the folding edge 7b side of the tubular inner bag body forming sheet material 7 is the edge 4 of the outer bag body forming sheet material 4.
The inner bag opening edge 8 is formed by cutting from b along the line of the protruding dimension L ₃ .

In the embodiment described above, the outer bag forming sheet material 4 is composed of a single folding sheet which is folded and forms a folding edge on the side of the edge 4a. It may be.
Further, the tubular inner bag forming sheet material 7 does not have to be tubular, and for example, the folded edge 7a is formed by folding on the edge 7a side described above. It may be constituted by a single folded sheet opened at 7b.

In the stacked state as shown in FIG. 1B, heat sealing treatment for forming a double bag for packaging is performed. As shown in FIG. 2A, the heat-sealing process forms the transverse heat-sealing portion 9 along a plurality of transverse heat-sealing lines extending in the transverse direction at predetermined intervals in the length direction of the continuous laminated sheet material. And, along the edge heat seal line extending along the edge 4a of the outer bag forming sheet material 4, the edge heat seal portion 1
Form 0. In one example, the width dimension of the transverse heat seal portion 9 is, with respect to the width dimension of the edge heat seal portion 10,
It is preferably doubled in size.

By this heat-sealing treatment, the outer bag-forming sheet material 4 and the inner bag-forming sheet material 7 are integrally heat-sealed in the transverse heat-sealing portion 9 as shown in FIG. 2C. After the heat-sealing process, the dimension L ₄ between the inner edge of the edge heat-sealing portion 10 and the folding edge 7a of the inner bag forming sheet material 7 is, for example, as shown in FIG. In that case, it is designed to be larger than the protruding tip size L ₅ of the skewer S in the skewered food SF.

The heat-sealed laminated sheet material is cut off along a cutting line CL extending along the widthwise center line of the transverse heat-sealed portion 9,
A double bag for packaging as shown in B is formed. In the embodiment shown in this figure, the sealing edge 4 of the outer bag body 2 is
a, the sealing end edge 7a of the inner bag body 3, the opening end edge 4b of the outer bag body 2, and the opening end edge 7b of the inner bag body 3 respectively intersect the transverse heat seal portion 9 and are parallel to each other, The sealing edge 7a of the inner bag 3 is located at the position of the dimension L ₄ from the inner edge of the edge heat-sealing portion 10 and prevents the outer bag 2 from being damaged by the penetration of stored items as much as possible. When the opening end edge 7b of the inner bag body 3 is projected outward from the opening end edge 4b of the outer bag body 2, when the stored items are sealed inside the inner bag body 3 by the mechanical sealing process, The opening of the inner bag body 3 can be reliably opened.

Next, the packaging double bag 1 according to the present invention.
The outline of another manufacturing procedure will be described with reference to FIG. Two outer bag forming sheet materials 4 and 4 having a thermoplastic resin layer 6 on one surface of the base film 5, and a tubular inner bag forming sheet material 7 having a folding edge made of a thermoplastic resin. As shown in FIG. 3A, two outer bag body forming sheet materials 4 and 4 are arranged so that the thermoplastic resin layer 6 is on the inner side, and a tubular inner bag body forming sheet material is provided therebetween. 7 are arranged and superposed in the manner as shown in FIG. 3A.

In this case, one folding edge 7a of the tube-shaped inner bag body forming sheet material 7 is located at a position L ₁ into the end edge 4a of the outer bag body forming sheet material 4 and has a tubular shape. The other folding edge 7b of the inner bag body forming sheet material 7 is set so as to take a position which is inserted from the end edge 4b of the outer bag body forming sheet material 4 by a dimension L ₁ . The example of this embodiment is an example of forming a double bag for packaging that is suitable for two-way picking, and as shown in FIG. 3A, is cut along the center line in the width direction. .

In the case of the embodiment shown in FIG. 3, as shown in FIG. 3A, the opening of the double bag for packaging is formed by cutting along the center line in the width direction. The opening edge of the outer bag 2 and the inner bag 3
Since the opening edge is formed on the same line, it is necessary to devise a method for surely opening the inner bag when the packaged items are enclosed. FIG. 3B shows an example of the device, and the inner surface of the outer bag 2 near the opening edge and the inner bag 3 are shown.
Between the outer surface near the opening edge of the
I am doing it. By forming in this way, the opening of the inner bag body 3 can be surely opened when the stored items are sealed in the inner bag body 3 by the mechanical sealing process. In addition, since the heat sealing is performed in a dot shape, the air entering between the outer bag body 2 and the inner bag body 3 can be easily released.

2B and 3B, the open bag ends of the outer bag 2 and the inner bag 3 are heat-sealed after the contents are stored in the inner bag. The edges can be integrally heat sealed.

[0027]

The double bag for packaging of the present invention having the above-mentioned structure has a simple structure, is easy to manufacture, is suitable for mass production, and can be provided at a low cost. It can be said that it works extremely economically.

Further, in the double bag for packaging according to the present invention, the inner bag is integrally connected to the inside of the outer bag by a partial heat sealing treatment, and the bottom edge of the inner bag is connected to the outer bag. When the skewered food or the packaged items having sharp edges are stored inside the bottom edge of the, the pinholes for the outer bag body are formed by the skewers or the sharp edges of those items. It can be said that it acts extremely effectively in that it can prevent defects as much as possible and prevent deterioration of the packaging function in the distribution process.

Furthermore, the double bag for packaging according to the present invention solves the problem of bulkiness, and is also suitable for disposal after use and can respond to the dust problem. Can be said to work extremely effectively.

[Brief description of drawings]

FIG. 1 shows a specific embodiment of a double bag for packaging according to the present invention, which is a tubular bag having two outer bag forming sheet materials and folding edges. By the inner bag body forming sheet material, the opening edge of the inner bag body,
FIG. 1A is an example of forming a double bag for packaging projecting outward from the opening edge of the outer bag, and FIG. 1A shows a tubular inner bag having two outer bag forming sheet materials and folding edges. It is a schematic perspective view which shows the combination mode of a body formation sheet material, and FIG. 1B is a schematic perspective view which shows the mode which made them overlap.

2 relates to the embodiment shown in FIG. 1, and FIG. 2A is a schematic plan view showing an aspect of heat sealing treatment in the superposed state shown in FIG. 1B; 2C is a schematic plan view virtually showing a mode in which a double bag for packaging according to the present invention is cut along a cutting line, and skewered food is stored therein, and FIG. 2B is a schematic enlarged cross-sectional view taken along line 2C-2C in FIG. 2B, and FIG. 2D is a schematic enlarged cross-sectional view taken along line 2D-2D in FIG. 2B.

FIG. 3 shows another embodiment of a double bag for packaging according to the present invention, which is a tubular inner bag having two outer bag forming sheet materials and folding edges. FIG. 3A is an example of forming a double bag for packaging that is suitable for two-way assembly by a body forming sheet material, and FIG. 3A shows two outer bag body forming sheet materials and a tubular inner bag having a folding edge. FIG. 3B is a schematic perspective view showing a mode in which a body forming sheet material is overlaid, heat-sealed, and then cut, and FIG. 3B is cut along a cutting line to open ends of an outer bag and an inner bag. FIG. 6 is a schematic perspective view showing an example of a double bag for packaging in which a space between the inner surface of the outer bag and the outer surface of the inner bag is heat-sealed in a dot shape along the edge.

[Explanation of symbols]

 1 Double bag for packaging 2 Outer bag 3 Inner bag 4 Outer bag forming sheet material 4a Outer bag sealing side edge 4b Outer bag opening side edge 5 Base film 6 Thermoplastic resin layer 7 Inner Bag forming sheet material 7a Inner bag sealing side edge 7b Inner bag opening side edge 8 Cutting opening 9 Crossing heat seal part 10 Edge heat seal part 11 Point heat seal part SF Skewer food S S skewered body

Claims (3)

[Claims] 1. A double bag for packaging comprising an outer bag and an inner bag, wherein the outer bag has a thermoplastic resin layer on one surface of a base film, and the thermoplastic resin is a thermoplastic resin layer. An outer bag forming sheet material capable of being heat-sealed via a layer, the inner bag body is formed of a thermoplastic resin inner bag forming sheet material, and the outer bag body and the inner bag body face each other. Are integrally heat-sealed along the side heat-sealing line, and the outer bag and the inner bag are respectively a sealing edge crossing the side heat-sealing line and a sealing edge. And a sealing edge of the inner bag body, the distance L ₄ from the inner edge of the sealing edge of the outer bag body inside the outer bag body.
The packaging bag is characterized in that after the contents are stored in the inner bag body, the opening edges of the outer bag body and the inner bag body can be integrally heat-sealed. Heavy bag. 2. The double bag for packaging according to claim 1, wherein an opening edge of the inner bag protrudes outward from an opening edge of the outer bag. 3. The outer bag body and the inner bag body are point-wise heat-sealed along the opening edge between the inner surface of the outer bag body and the outer surface of the inner bag body. The double bag for packaging according to claim 1.