JPS6013792Y2 - packaging bag - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a packaging bag, and particularly to one using a plastic bag body.

In recent years, plastic bags have been widely used for product packaging because they have a good appearance when packaged and are inexpensive.

Among packaging bags using such plastic bags,
Due to the convenience of product arrangement, bags are sometimes hung for display, and because it is necessary to provide rigidity to the bag, a thick plate called a header member is attached to the bag.

On the other hand, in order to make it possible to take out and store the products stored in the bag multiple times or to improve the sealing performance of the bag, a part of the bag body is folded back at the opening of the bag and a lid member is attached. Some are set up.

In order to improve productivity in such a bag that has a header member and a lid member at the same time, synthetic paper is used as the header member, and a long length of synthetic paper is layered on a long bag body film. There is a method of manufacturing packaging bags by sequentially thermally cutting the bags according to their width dimensions.

However, since the conventional synthetic paper has a plastic film laminated with the same properties as the bag body on its surface, the synthetic paper and the bag body are completely welded together when thermally welded.

Therefore, if conventional film-laminated synthetic paper is used to give rigidity to the lid, the lid and the bag will be welded together at both edges during thermal melting, and when the lid is opened, the bag will be bonded to the bag at both edges. There is a disadvantage that the body etc. may be damaged.

Further, even when a plastic plate of the same quality as the bag body but thicker than the bag body is used as the header member, the lid member and the bag body are welded together during thermal cutting, resulting in a similar problem.

An object of the present invention is to provide a packaging bag formed by thermal melt cutting in which the lid member and/or the bag body are not damaged when the lid member is opened.

In the present invention, at least one of the parts of the bag body and the lid member that come into contact with each other is made of a header member that is thicker than the bag body, and the open side surface of the header member is attached to the header member. By making the plastic material different from the bag body or lid member that comes into contact with it, welding between the header member and the bag body or lid member is completely prevented or reduced, making it easy to open.On the other hand, the lid member of the header member can be easily opened. Alternatively, the surface on the side that is not opened is made of the same plastic as the lid member or the bag body, thereby sufficiently welding the lid member or the bag body to achieve the above object.

Hereinafter, embodiments of the present invention will be described based on the drawings.

Here, the same or equivalent components in each embodiment are given the same reference numerals to simplify the explanation.

1 to 4 show a first embodiment of the present invention,
Figures 1 and 2 show the state before the goods (commodities) are stored, and Figures 3 and 4 show the state after they are stored.

In FIGS. 1 and 2, the bag body 10 consists of a front film 11 and a rear film 12, and these films 11.
12 are bent and connected together at a bottom portion 13 at the lower end in the figure.

At this time, the front film 11 and the rear film 12 may be connected together at the bottom 13 by folding a single plastic film in half as shown in the figure, or they may be two separate films. They may be connected by thermal welding.

The upper end of the rear film 12 of the bag body 10 is longer than the front film 11 in the state shown in FIGS. 1 and 2 before the product is stored, and an extension part 16 is formed.

When storing a product through the opening 17 for storing and taking out stored items (products), this extension part 16 blows compressed air into the opening 17 while holding down the extension part 16 to open the opening 17 wide and store the product. It is used to make storage easier.

A lid member 20 is disposed opposite to the top of the front film 11 of the bag body 10.

This lid member 20 includes a film 21 that was integrated with the extension portion 16 before being cut by a cutter 30, as shown by the chain line in FIG. The upper edge of the header member 23 is attached to the front film 11.
It is positioned so that it protrudes from the upper edge of the .

The header member 23 is made of a synthetic paper 24 thicker than the plastic film constituting the bag body 10, and this synthetic paper 2.
first and second plastic layers 25 overlaid by laminating, coating, or other means on both sides of 4;
．． It consists of 26.

At this time, the first plastic layer 25 on the side that comes into contact with the front film 11 of the bag body 10, that is, on the open side,
The second plastic layer 26 on the side to be welded to the film 21 with the decorative seal 22 is made of a different plastic material from the plastic film composing the film 21.
1, that is, it is made of the same plastic material as the bag body 10.

The material combination of the first plastic layer 25 and the bag body 10 is polypropylene unstretched (hereinafter referred to as CP).
That's what it means.

) and polypropylene biaxially oriented (hereinafter referred to as OP).

), CP and polyethylene (hereinafter referred to as PE).

), OP and PE, etc., and in short, any combination that can thermally cut but not weld or has a low degree of welding is sufficient.

Further, the material to be selected for either the first plastic layer 25 or the bag body 10 is free and can be determined according to the required conditions of the bag body 10.

Both left and right edges of the lid member 20 in FIG. 1 are melted at the same time when the left and right edges of the bag body 10 are melted, and a double-sided adhesive tape made of pressure-sensitive adhesive is used as an openable and closable sealing member near the lower edge. 40, it is affixed over the entire width in the lateral direction so as to be openable and closable.

Further, a hole 50 is provided through the lid member 20 and the bag body 10, and the bag body 10 can be hung using this hole 50.

Next, an example of the manufacturing method, product storage method, and usage method of this embodiment will be explained.

A long plastic film (original film) is folded in half along the longitudinal direction from a position slightly offset from the center in the width direction.
One end edge is connected to the film 21 of the lid member 20 and the extension part 16.
Extend it from the other edges just enough to form a .

A header member 23 is placed inside the film on this extended side, that is, the film 21 of the lid member 20.
(Hereinafter, when there is no need to make a distinction, it will simply be referred to as a header member 23.

) are arranged so that they overlap and the second plastic layer 26 is on the film 21 side, and the decorative stickers 22 are heat-sealed.

Next, the first plastic layer 25 of the header part 23
After pasting the double-sided adhesive tape 40 on the surface of the cover member 20, bend the extension part 16 as shown by the chain line in FIG.
Then, the long members that constitute the bag body 10 and the lid member 20 are sequentially heat-sealed in predetermined widths using a heat-sealing machine (not shown), and then the elongated members that are to constitute the bag body 10 and the lid member 20 are sequentially heat-sealed at predetermined width intervals, and the product is then stored as shown in FIGS. 1 and 2. packaging bag.

This packaging bag with its upper end opened is sent to a product storage process, where compressed air is blown from the direction of the arrow while the extension part 16 is being held down.
The side is inflated to facilitate insertion of the product, and in this state, the product (not shown) is inserted into the bag 10 from the direction of the arrow.

After inserting this product, the top of the bag 10 is covered with the front film 11.
From a position slightly above the upper edge of the header member 23 and slightly lower than the upper edge of the header member 23, for example, the position indicated by the dashed line A in FIG. , it has the shape shown in FIGS. 3 and 4, and the hole 50 allows it to be hung on an exhibition stand or the like.

During this sealing, since the upper edge of the front film 11 is located below the seal line A-A, there is no welding of the front and rear films 11 and 12, and the film 21 of the lid member 20 and the rear film 12 are not welded together. The upper edges of the bags are welded to each other as shown in FIG. 4, so that the lid member 20 does not separate from the bag body 10 when the bag is opened.

To remove the product from the bag 10 in which the product is stored in this manner, the lid member 20 is peeled off against the adhesive tape 40.

When storing the product again, the product is stored with the lid member 20 open, then folded back, and the adhesive tape 40 is pressed and pasted onto the front film 11.

At this time, when opening the lid member 20 for the first time, the lid member 20
Because the side edges of the front film 11 are not strongly welded to the front film 11 due to the action of the first plastic layer 25, the lid member 20 and/or the bag body 10 can be easily opened without being damaged. By welding the film 21 of 20 and the rear film 12, the lid member 20 is attached to the bag body 10 without being torn.

As described above, according to this embodiment, the contact surface of the header member 23 with the front film 11, that is, the open side surface, is provided with a different first plastic layer that does not have or has little thermal weldability with the front film 11. 25, without causing damage to the bag body 10 and/or the lid member 20.
Easy to open.

Moreover, since the lid member 20 is integrated with the bag body 10 via the film 21 during the manufacturing process, when printing is performed on the surfaces of the lid member 20 and the bag body 10, both 2
A printing pitch deviation of 0.10 does not occur, and the appearance can be made beautiful.

Furthermore, since the lid member 20 is sealed with a double-sided adhesive tape 40 that can be opened and closed, the lid member 20 can be opened and closed multiple times, and the consumer can open the lid member 20 and check the product when purchasing the product. It can be purchased from.

Further, since the configuration and manufacturing method described above are suitable for an integrated manufacturing line, continuous production can be performed at low cost.

Further, on the side opposite to the open side of the header member 23, that is, the side to be welded to the film 21, a second plastic layer 26 made of the same plastic as the film 21 is provided.
is formed, the header member 23 and the lid member 20
can be sufficiently welded to the film 21.

The manufacturing and product storage process of the bag body 10 described above is just an example. For example, the header member 23 is heat-welded to a long film, and then the header member 23 is peeled on the surface of the header member 23. After applying the double-sided adhesive tape 40 to which paper is attached, processes such as folding the film, folding back the lid member 20, cutting the film, and storing the product may be performed. Instead of being formed by bending one film, it may be formed from two films.

Furthermore, double-sided adhesive tape 4 is used as an openable and closable sealing member.
0, other means such as a so-called fastener made of strips having recesses or projections that engage with each other may be used, and the adhesive tape 40 may be attached to the front film 11 side.

Further, the heat welding between the film 21 and the header member 23 is not limited to the so-called decorative sticker 31, and other means such as a simple seal may be used, but if the decorative sticker 31 is used, the appearance can be improved and the welding strength can be increased. can.

Further, the seal line A-A may be placed below the upper edge of the front film 11, but this has the disadvantage that the front and rear films 11 and 12 are welded to some extent, making it somewhat difficult to open the opening 17 when unpacking. .

However, in this case, the positional relationship between the upper edges of the front film 11 and the header member 23 does not matter.

In addition, on the surface of the header member 23 that comes into contact with the bag body 10,
The first plastic layer 25 does not necessarily need to be provided; in this case, the header member 23 itself is a member that has no or little heat weldability with the bag body 10, and the welding with the film 21 at this time is on the film 21 side. This can be dealt with by providing the second plastic layer 26 in the same way as in the previous embodiment.

In addition, when storing a large number of plastic garbage bags, etc., the bottom 13 of the bag body 10 is perforated in a half-moon shape to provide a cut-out piece, and this cut-out piece can be cut out.
It is also possible to sequentially take out the plastic garbage bags one by one through this cut-out hole.

FIG. 5 shows a second embodiment of the present invention, which differs from the first embodiment in the heat welding position of the header member 23.

That is, in this embodiment, the header member 23 is heat-welded to the front film 11 of the plastic film constituting the bag body 10 using two decorative stickers 60.

Therefore, the lid member 20 is composed only of the film 21 which remains continuous with the rear film 12, and a double-sided adhesive tape 40 is attached to the vicinity of the lower end of the film 21.

At this time, the header member 23 is attached to the lid member 20 of the synthetic paper 24.
A first plastic layer 25 having no heat-sealability is placed on the side thereof, and a second plastic layer 26 having the same quality as the bag body 10 is placed on the front film 11 side.

In addition, the front film 11 is cut by the cutter 30 at the lower part of the bag body 10, so that the rear film 1
An extension part 16A is formed at the lower end of the bag 1, and an opening 18 for storing the product is formed.After the product is stored through the opening 18, it is heat-sealed from line A-A to form the bag 1.
The lower end of the bag is closed, and a packaging bag containing the product is obtained.

This embodiment can also achieve the same effects as the first embodiment, and the modification of the first embodiment can be applied with some wording changes.

Further, the adhesive tape 40 in this embodiment is not limited to being attached to the lid member 20 side, but may be attached to the header member 23 side, and furthermore, the cutter 30 may cut it to the rear film 12 side.

FIG. 6 shows a third embodiment of the present invention, in which the header member 23 of the first embodiment is extended and inserted into the bag body 10 from the opening 17, Moreover, it is welded to the rear film 12 by two decorative stickers 70.

In addition, products are stored from the lower end of the bag body 10 as in the second embodiment.

This embodiment also has the same effects as those of the embodiments described above.

Furthermore, in this embodiment, since the header member 23 is disposed astride both the bag body 10 and the lid member 20, the strength near the opening 17 is sufficiently increased, and the lid member 20 is
The opening and closing operations can be performed extremely easily and reliably, and since both side edges of the lid member 20 are not welded to the bag body 10 along its entire length in the vertical direction, damage to the lid member 20 etc. can be completely prevented. Effects can be added.

As described above, according to the present invention, in a packaging bag formed by thermal cutting, there is an effect that the lid member and/or the bag body will not be damaged when the lid member is opened.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing the first embodiment of the present invention in a state before storing the product; FIG. 2 is an enlarged sectional view of FIG. 1;
FIG. 3 is a perspective view showing the state of the first embodiment after the product is stored;
FIG. 4 is an enlarged sectional view of FIG. 3, and FIGS. 5 and 6 are enlarged sectional views showing the second and third embodiments of the present invention, respectively, before storing the product. 10... Bag body, 11... Front film, 12... Rear film, 17... Opening, 20... Lid member, 21...Film, 23...Heng part, 24...
・Synthetic paper, 25...First plastic, 26
...Second plastic layer.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An opening for taking out stored items is formed at one end edge of a plastic bag, and a lid member is attached to cover this opening so that it can be opened and closed, and the lid member is in a closed state. In a packaging bag in which both side edges of the bag body are welded by thermal welding, at least one of the portions of the bag body and the lid member that come into contact with each other is composed of a header member having a thickness smaller than that of the bag body, and , the surface of the header part that comes into contact with the bag body or the lid member and is opened is formed of a plastic different from that of the bag body or the lid member, and further, the bag body or the lid member of the header part A packaging bag characterized in that the side that is welded to the lid member or the bag body and opposite to the side that comes into contact with and opens is made of the same plastic as the lid member or the bag body. 2. In Claim 1 of the Utility Model Registration Claim, the header member includes synthetic paper, a surface on the contact and open side of the synthetic paper with the bag body or the lid member, and a surface on the opposite side, respectively. A packaging bag comprising a laminated thin plastic film. 3. The packaging according to claim 1 or 2 of the utility model registration claim, characterized in that the edge of the plastic bag opposite to the opening is welded and closed by thermal welding after storing the contents. Bag for use. 4. In claim 1 or 2 of the utility model registration claim, the edge of the plastic bag opposite to the opening is integrally formed by bending, and the stored items are stored from the opening on the lid member side. A packaging bag characterized by: