JPH11157550A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To store a large amount of contents with a small amount of packaging material. SOLUTION: Two laminated films, each of the films having a heat-adhesive resin layer on at least one of the sides thereof, are disposed so that the heat- adhesive layers thereof are oppositely oriented to one another. A laminated film having a heat-adhesive layer, folded in two, is inserted into between the two laminated films so as to be located between the top parts and the bottom parts thereof, and the peripheries of these films are thermally bonded to one another to form a fold. And the inserted laminated film is opened to form a top part and a bottom part, whereby a packaging bag having a self-supporting property is provided. A pour port 3 is provided in one of the side edges of the bag and a charging port 7 is formed in a side edge in opposition to the port 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-supporting packaging bag, and more particularly to a packaging bag having a self-supporting packaging bag and capable of filling a large amount of contents with a small amount of packaging material.

[0002]

2. Description of the Related Art In recent years, there has been a call for efforts to minimize the amount of resources discarded due to resource conservation due to environmental problems. Attempts to fill have been made. As a large-capacity packaging bag, there is a packaging bag in which two rectangular laminated sheets are opposed to each other and four sides thereof are sealed to form a bag. When such a packaging bag is filled with contents. In addition, the four corners became acute angles, resulting in a shape like a so-called seat cushion, which was inconvenient to carry or had a poor appearance, and that the contents were difficult to be taken out. As an alternative to this, a packaging bag has been proposed in which a folded fold sheet is fused to the bottom and the top (see JP-A-57-46750).

[0003] The packaging bag described in this publication includes a main body sheet comprising two single-layer or multi-layer sheets, and in the case of at least a multi-layer sheet, an innermost layer comprising a heat-welding material; And two fold sheets folded so as to form a substantially W-shaped cross section on two opposing sides of the plate. The edge seal covers substantially the entire length of the other two opposing sides without the folds. The fold sheet
The main body sheet is fold-sealed with two inclined lines or curved lines substantially starting from the edge seal part on the folding back line of the seat, and the fold part is formed. A packaging bag, characterized in that a content take-out port is provided at the edge seal portion between them except for the above. And as filling and discharging of the contents,
A small cylindrical spout is formed integrally, so that pouring and filling are performed at the same place, and the shape of the bag is necessarily limited. However, in consideration of the workability at the time of filling, a wide and linear opening is desirable, but on the other hand, there is a problem that handleability at the time of pouring is poor.

[0004]

The inventors of the present invention have studied various types of packaging bags that can improve the above-mentioned disadvantages and can quickly fill the contents. As a result, the inventors have found that a filling port and a spout are separately provided. The shape of the packaging bag can be determined arbitrarily, and as a result, it has been found that the above-mentioned disadvantages can be improved, and the present invention has been completed, and the object of the present invention is to fill the contents. To provide a resource-saving packaging bag with good handling at the time of pouring.

[0005]

SUMMARY OF THE INVENTION The gist of the present invention resides in that a heat-adhesive layer of two laminated films having a heat-adhesive resin layer on at least one surface is opposed to each other, and a top portion of the two laminated films is formed. And insert the laminated film having a thermal adhesive layer between the bottom and folded in two, heat-sealed these peripheral edges to form a fold, open the inserted laminated film to form the top and bottom Packaging bag provided with a spout on one side edge of the packaging bag, and a side edge facing the spout serving as a filling port. It is.

That is, according to the present invention, a folded portion is formed by inserting a folded sheet into a top portion and a bottom portion, and by opening the folded portion, a large amount of contents can be stored and the self-sustainability can be improved. By giving the filling port and the filling port differently, a free-form packaging bag can be obtained. In particular, by setting the filling port and the filling port at the opposite positions of the packaging bag, The outlet may have a protruding shape. Thereby, the spout can be used as a refill packaging bag for detergents, shampoos, etc., for inserting contents into another container to pour out the contents.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Further, the present invention will be described in detail. The laminated film forming the packaging bag in the present invention may be any film conventionally used for producing this type of packaging bag. That is, a laminated film that usually forms this type of packaging bag is composed of a two-layer film having a sealant layer on the inside and a base film layer on the outside, or a three-layer film having a gas barrier layer interposed therebetween. I have. And, as the base film layer, nylon, polyester (PET), oriented polypropylene (OPP),
Paper or the like is used. As the sealant layer, polyethylene (PE) such as low-density polyethylene (LDPE) and high-density polyethylene (HDPE), ethylene-vinyl acetate copolymer (EVA), and linear low-density polyethylene (LLDP)
E), polypropylene (PP), ionomer and the like are used. Aluminum foil is used as the barrier layer of the intermediate layer,
Eval, SiOx evaporated film or the like is used. Therefore, a combination of these is used as the laminated film used in the present invention. For example, OPP / LDP
E, nylon / low density polyethylene, nylon / EV
A, PET / EVA, PET / PE / aluminum foil / PE,
SiOx deposited PET / L-LDPE and the like can be mentioned.

The shape of the spout and filling port of the packaging bag is not particularly limited, but the spout has a shape protruding from the side edge of the packaging bag so that the contents can be poured out in a certain direction. Preferably, the portion is further reinforced. That is, the film constituting the packaging bag has flexibility, but the contents can be stably poured out by reinforcing the spout. As a reinforcing method, a reinforcing rib can be provided at a spout of a film constituting a packaging bag, or a pipe can be inserted inside the spout. Further, a curable paint may be applied to the spout and cured. The curable paint may be any of a thermosetting paint, an ultraviolet-curable paint (UV paint), an electron beam-curable paint, and the like, but the UV paint and an electron beam-curable paint (electro-beam-curable paint) require a heat curing device. In particular, UV paint is preferred from the viewpoint of equipment, workability, and the like.

The spout may be provided at any position on the side edge, but it is preferable to provide the spout above the center of the side edge because it is easier to pour out than when the spout is provided below the center. The filling port is provided on the side edge opposite to the side edge where the spout is provided.The shape is not limited, but the width of the filling port is as large as possible, and the shape is easy to fuse after filling. Is preferable. In the packaging bag of the present invention, two laminated films, a front film and a back film, are opposed to each other, and a film laminated film having another heat-adhesive layer is heat-bonded to form folds at an upper end and a lower end. The film is folded in two so that the conductive layer is on the outside, and inserted in accordance with the upper end and lower end of the front and back films, and the side edges are fused to be integrated. At this time, if there is also a thermal adhesive layer inside the folded folded laminate film, the laminated film to be inserted and the front film and the laminated film to be inserted and the back film are thermally bonded, and then the packaging bag Thermally bond the side edges of
If there is a thermal adhesive layer only on the outside, cut off a part of the side edge of the laminated film of the fold formation, this part fuses the front film and the back film, and the other part The front film, the fold film and the back film are fused together to make the three parts integral, and a straight or curved line is formed at each edge from the intersection of the folded line of the fold formation and the side edge. It is possible to open the fold-formed laminated film inserted by fusing the front film and the fold-formed laminated film and the back film and the fold-formed laminated film to form a top part and a bottom part so as to have autonomy. it can.

Next, an example of a packaging bag according to the present invention is shown in FIGS. 1 to 3, but is not limited to such a shape.
These figures are all plan views. In the figure, laminated sheets 1 and 1 ′ having thermal adhesiveness are opposed to inner surfaces forming front and back surfaces of a packaging bag, and a spout 3 is provided at one side edge 5. The side edge portion 6 facing the side edge portion 5 having the spout 3 is left unfused to form a filling port 7.
1 and 3 show a case where the filling port 7 protrudes slightly outward, and FIGS. 2 and 3 show that the spout 3 is located substantially at the center of the side edge 5 and is parallel to the sides of the upper edge and the lower edge. Here is an example. The laminated sheet 8 having a fold is inserted into the upper end and the lower end of the packaging bag. In the figure, a dotted line 9 parallel to the upper end side and to the lower end side shows a fold line of the laminated sheet 8 formed with a pleated portion inserted between the laminated sheets 1 and 1 ', and a semicircular portion 10 is a pleated portion. And the back film where the folds were fused. When filling such a packaging bag with the contents liquid, the films on the front and back constituting the bag are suctioned and opened by a filling machine to fill the contents liquid.

[0011]

Examples and Comparative Examples Hereinafter, the present invention will be described more specifically with reference to Examples. Example 1 The present invention will be specifically described with reference to examples. As the film on the front and back of the packaging bag, 15 μm nylon and 8
A laminated film of 0 μm LLDPE is used as a fold forming film, with a folding width of 60 mm, a bottom width of 120 mm, a top width of 120 mm, a thickness of 15 μm of nylon and a 70 μm LL.
Using a laminated film of DPE, fold it in half, insert it in accordance with the upper and lower ends of the film on the front and back sides, and fuse the peripheral edge to form a shape as shown in FIG. 2 having a width of 120 mm and a height of 150 mm. A packaging bag was formed. The filling capacity of this packaging bag is about 500 ml, and the filling port is wide so that the filling operation is easy, and the spout is protruding so that it can be inserted into the mouth of the refill container to easily perform the refilling operation. did it. The usual packaging bag having a width of 120 mm and a height of 230 mm and having a fold at the lower end has a content of about 500 ml.

[0012]

As described above, according to the present invention, a large-capacity packaging bag is formed by inserting the laminated film forming the fold at the upper end and the lower end, and opening the upper end and the lower end. By providing a spout and a filling port separately, the shape of the packaging bag can be arbitrarily changed, and by providing a spout on one side edge and a filling port at a position facing the side edge. , The width of the filling port can be made large enough to substantially match the length of the side edge of the packaging bag, as a result, the workability of filling the contents is improved, and the shape of the spout is optional. Since the spout is formed in a protruding shape, there is an effect that it is suitable as a packaging bag for refilling and refilling.

[Brief description of the drawings]

FIG. 1 is a plan view of a packaging bag according to the present invention.

FIG. 2 is a plan view of another packaging bag according to the present invention.

FIG. 3 is a plan view of another packaging bag according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1, 1 'Laminated film (face material) 2 Packaging bag according to the present invention 3 Spout port 5, 5' Side edge 6 Peripheral heat fusion part 7 Filling port 8 Pleated part forming laminated film 9 Pleated part folded line 10 Front and back Three parts of the film and the fold forming film

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Koji Takada 1-4-16-1 Nihombashi Bakurocho, Chuo-ku, Tokyo Inside Fujimori Industry Co., Ltd.

Claims (3)

[Claims] 1. A thermo-adhesive layer of two laminated films having a thermo-adhesive resin layer on at least one surface thereof is opposed to each other, and a thermo-adhesive layer is provided between a top part and a bottom part of the two laminated films. Laminate the laminated film with the heat-adhesive layer of the laminated film into two, insert and fold these peripheral parts by heat fusion to form the folds, open the laminated film and configure the top and bottom to become self-supporting What is claimed is: 1. A packaging bag having properties, wherein a spout is provided on one side edge of the packaging bag, and a side edge facing the spout is a filling port. 2. The packaging bag according to claim 1, wherein the spout is reinforced as compared with the bag body. 3. The packaging bag according to claim 1, wherein the spout projects from the side edge.