JP2000043900A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a packaging bag convenient to carry by hands even when the bag is of square bottom shape. SOLUTION: One end forming the bottom side of a bag material constituting a bag is folded to a large extent to form a gusset 2 forming a square bottom, and the position separated by the required width from the folding end edge of the folded section is sealed 3, and a tape inserting section 5 having a tape 4 as a hanger is formed inside, and a bag material on the central position of the folding end edge is cut off to form a cut 6 from which a part of the tape is exposed, and when a square bottom is formed after stuffing a content, the tape inserting section 5 is drawn forward, and the tape 4 can be hung down from the cut 6 by the arrangement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic bag made of a plastic film, which is suitable for storing and packing sanitary napkins, paper diapers and the like.

[0002]

2. Description of the Related Art Sanitary napkins and paper diapers are bulky commodities, and therefore are packaged in a square shape, such as being stored in a gusseted packaging bag. It is difficult to hold.

[0003]

However, in the case of a packaging bag having the above-described configuration, it is difficult to hold the bag even if a supporting hole is formed at one end of the bag, and a hanging hole is provided at the center of the square bottom. If you do, it will be double bottomed and you will need a lot of bag material,
In addition, there is a problem that the manufacturing process is complicated and the cost is increased.

An object of the present invention is to provide a packaging bag which is easy to hold by hand while being a square-bottomed bag, and which is easy to manufacture.

[0005]

According to the present invention, there is provided a gusset for forming a square bottom by folding one end on the bottom side of a bag material constituting a bag, and folding the folded portion. Seal a position separated by a required width from the edge to form a tape insertion portion in which a tape serving as a hanger is formed, cut off the bag material at the center position of the folding edge, and a part of the tape is removed. An exposed notch is formed, and the tape insertion portion is drawn to be able to hang the tape from the notch when it becomes a square bottom after packing the contents.

When a corona treatment for printing is performed on the surface of the plastic film as the bag material, the corona treatment is not performed on the surface of the gusset that constitutes the tape insertion portion, and the corona non-treatment is performed. It is preferable to heat-weld the film and the tape in the portion in order to increase the adhesive strength. In addition, opening the gusset portion can be facilitated by perforating the gusset portion.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a partially cutaway perspective view of one embodiment of a packaging bag 1 according to the present invention, and FIG. 2 is a schematic cross-sectional view taken along a line AA in FIG. In FIG. 2, the upper portion constitutes the bottom when the contents are stored, and becomes the upper portion after the contents are stored and packaged.

The bag material is made of a plastic film such as polyethylene or polypropylene. This film is folded in half and the folded side is folded inward over a required width to form a gusset 2 for forming a square bottom. A seal 3 is applied at a position separated by a required width L from the folded edges 1a, 1a, and tape insertion portions 5, 5 in which tapes 4, 4 serving as hooks are formed are formed therein, and both sides of the bag material are formed. The edges 1b, 1b are welded to form a packaging bag 1 whose lower end 1c is open.

The tape 4 is made of, for example, a plastic such as high-density polyethylene or polypropylene, which can be thermally welded to the film, and preferably has a thickness of about 100 to 300 μm and a width of about 10 to 30 mm. It may be appropriately selected according to the size.

The bag material at the center in the width direction of the folded edges 1a, 1a is cut out to form cutouts 6, 6, and a part of the tape 4, 4 is exposed in the cutouts 6, 6. Then, the tapes 4 and 4 can be pulled out from here.

A perforation 7 is formed on the film at a position slightly higher than the inner end 2a of the gusset 2 so that the gusset 2 can be cut in the center by the perforation 7 when taking out the contents. It has been made.

FIGS. 4A to 4E show an example of a manufacturing process of the packaging bag 1. The long film 8 is folded in two along the longitudinal direction thereof while the perforations 7 are formed. Feeding (FIG. 4 (A)), a part to be the gusset 2 is folded inward on the bending side (FIG. 4 (B)).

Thereafter, the notches 6 and 6 are punched at a constant pitch (FIG. 4C), and then the tapes 4 and 4 are inserted into the folded ends of the gusset 2 (FIG. 4D), and the seal 3 is applied. After forming the tape insertion portions 5 and 5 by fusing, the tape is cut off at the width position (a-i) as the packaging bag 1 (FIG. 4).
(E)). In addition, the welding of the side part is not only by fusing,
A seal of a required width may be provided.

As a result, the packaging bags 1 of the form shown in FIG. 1 can be continuously produced one by one.

When printing is performed on the film 8, the surface of the film 8 may be treated by corona discharge in order to enhance the adhesive strength of the printing ink due to partial oxidation of the film. In this case, if the sealing portion is subjected to corona treatment, the sealing strength is reduced, so that the adhesive strength between the gusset 2 and the tape 4 is increased. The surface is not subjected to corona treatment so that the corona-treated surfaces do not face each other.

Next, the operation will be described.

After packing the contents such as sanitary pads and diapers from the open end of the lower end 1c of the packaging bag 1 formed as described above, the open end is sealed and packed.

The packaging bag 1 thus packaged is a gusset 2
Extend to a square bottom shape, and become a self-supporting package as shown in FIG.

When holding this by hand, the notches 6, 6
When the fingers are put on the tapes 4 and 4 exposed to the tape, the tape insertion portions 5 and 5 are contracted, and the tapes 4 and 4 are slightly pulled out. Can be hung. When taking out the contents, if the gusset 2 is strongly pulled left and right and cut off at the perforation 7, the upper part of the contents is opened, so that the contents can be easily taken out.

[0021]

As described above, according to the present invention, even if the packaging bag is a square-bottomed packaging bag with a gusset, it can be formed with a hanging handle which is easy to hold by hand, and the contents are wide open ends. , It is easy to carry out packaging work, and after the open end is sealed, it is in a sealed state to protect the contents in a sanitary manner. In addition, since the production can be performed in a series of steps, mass production becomes possible.

According to the second aspect, even if the corona treatment is performed, the sealing strength of the tape portion is not impaired, and according to the third aspect, it is easy to take out the contents when taking out the contents. Can be.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a packaging bag according to the present invention.

FIG. 2 is a schematic sectional view taken along the line AA of FIG. 1;

FIG. 3 is a perspective view showing a state where contents are stored and packaged.

4 (A) to 4 (E) are explanatory views showing an example of a structure process of the packaging bag of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Gazette 3 Seal 4 Tape 5 Tape insertion part 6 Notch part 7 Perforation 8 Film

Claims (3)

[Claims] 1. A gusset for forming a square bottom by folding one end on the bottom side of a bag material constituting a bag, sealing a position separated by a required width from a folded edge of the folded portion, and sealing the inside thereof. Forming a tape insertion portion in which a tape serving as a hanging handle is formed, cutting out a bag material at a center position of the folding edge to form a cutout portion in which a part of the tape is exposed, and A packaging bag, wherein the tape insertion portion is pulled when the bottom of the package is squared, and the tape can be hung from the cutout portion. 2. A plastic film which is a bag material is subjected to a corona treatment for printing on a surface thereof, and a corona treatment is not carried out on a surface of an area constituting the tape insertion portion of the gusset, The packaging bag according to claim 1, wherein the film and the tape are heat-welded in the non-corona-treated portion. 3. The packaging bag according to claim 1, wherein a perforation for incision is provided at or near the inner end of the gusset of the bag material.