JPS6126198Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a plastic packaging bag used for storing, for example, daily necessities, foodstuffs, and various other products and articles.

Conventionally, this type of plastic film wrapping bag has been widely used, with a hook hole drilled in the upper part of the bag in which the item is placed, that is, in the head part, so that a large number of bags can be hung on a nail or the like for display. It is being However, since the mechanical strength of the head portion with the hooking hole is weak, there are problems such as the area around the hooking hole being easily torn and the bag losing its shape due to the weight of the contents.

In order to improve this problem, the head part where the hooking hole is provided is reinforced by pasting cardboard or another material on it, but this has the disadvantage that the manufacturing cost is quite high. Further, the mechanical strength of the head portion is still insufficient, and the appearance is not very good.

The purpose of this invention is to improve the above-mentioned conventional problems by constructing the head part of the packaging bag so that sufficient strength can be obtained without pasting any other material, and by using durable and inexpensive plastic. The purpose of the present invention is to provide a packaging bag, the gist of which is a packaging in which a bag part for storing an article is provided below a head part with a hook hole, and a part of the bag is thick and the majority of the bag is thin. By constructing the bag part from the thin part of a single piece of molded plastic film, and by overlapping the front and back thick parts with the fold provided in the middle of the thick part as the upper edge and welding them together. This is a plastic packaging bag characterized by a head portion.

The present invention will be explained in detail below based on illustrated embodiments.

FIG. 1 shows the front surface of the plastic packaging bag according to the present invention, FIG. 2 shows the back side thereof, and FIGS. 3 and 4 illustrate the cross-sectional views thereof. The wrapping bag of the embodiment is composed of one continuous plastic film 1, and this plastic film 1 is made up of a thick part 2 whose thickness has been increased in advance by molding, and another thin part 3. A thinner fold 8 is provided in the middle of the thick portion 2, and the thick portion 2 is divided into front and back parts with this fold 8 as the upper edge, which are overlapped with each other.
The head part A where the hooking hole 4 is drilled is this thick part 2.
The bag portion B that continues below is made up of a thin wall portion 3. A cut 5, which is an entrance and exit of the bag part B, is provided on the back side, and articles 6 to be stored in the bag part B are taken in and taken out through this cut 5.

To make such a wrapping bag, for example, as shown in FIG. 5, a tube-shaped plastic film 1 having a thick wall portion 2 and a thin wall portion 3 is formed in advance, and this tube-shaped material is cut to an appropriate width. The left and right edges 7a and 7b may be heat-sealed, and the head portion A may be heated and pressed to weld the overlapping thick portions of the front and back sides together. Of course, during or before or after this process, drilling of the hooking holes 4 and cutting of the cut edges 5, printing of characters 10, patterns, etc. can be carried out as appropriate.

The embodiment shown in FIG. 4 shows an example in which an adhesive seal 9 for sealing the cut 5 is attached.

In addition, without necessarily using a tube-shaped material, for example, a flat film having a shape expanded from the cut 5 shown in FIG. You can also make In addition, heat sealing is not necessarily performed on both the left and right edges 7a and 7b as shown in the figure, and may be performed as appropriate depending on the shape of the material. Bend both left and right edges 7
By sealing a and 7b, the strength of the lower part of the bag portion B is increased, and the resistance against the weight of the articles 6 stored therein is improved.

As explained above, the plastic packaging bag according to the present invention has extremely high mechanical strength because the head portion with the hook hole is integrally welded by overlapping the thick parts of the front and back sides. There is no risk of the area around the hooking hole being torn or the shape of the bag being improperly deformed. Furthermore, since there is no need to reinforce the head portion by bonding other materials together as in the past, manufacturing costs can be significantly reduced and the appearance is also noticeably improved.

[Brief explanation of the drawing]

The drawings show embodiments of the plastic packaging bag according to the present invention, in which Figure 1 is a front view of the packaging bag, Figure 2 is a back view, Figures 3 and 4 are sectional views of each embodiment, and Figure 5 is a cross-sectional view of each embodiment. The figure is a cross-sectional view of a tube-shaped material for manufacturing packaging bags. 1 is a plastic film, 2 is a thick part, 3 is a thin part, 4 is a hooking hole, 5 is a cut, 7
a and 7b are edges, 8 is a fold, A is a head portion, and B is a bag portion.

Claims (1)

[Scope of utility model registration request] It is a packaging bag that has a bag section for storing an article below a head section with a hook hole, and is made of a thin section of a single piece of plastic film that is partially made thick and most of it thin. made of plastic, and has a head portion formed by overlapping the thick parts on the front and back sides and welding them together with the fold provided in the middle of the thick part as the upper edge. Wrapping bag.