JPH0551040A - Packaging bag - Google Patents

Abstract

PURPOSE:To easily effect the opening and closing of a tape sealed part of a packaging bag having its contents stored in an airtight condition after filling the contents through an opening part at one side of the bag. CONSTITUTION:In a packaging bag P having an opening part 2 at one side of a plastic film made bag 1 and an air suction value 3 at a predetermined place, self-adhesive tapes 4 are attached to the opposite sides of the inner surface of the opening part 2. To use this bag, the bag is filled with its contents through the opening part 2, which is then sealed with the self-adhesive tapes 4 through the cohesive property.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention, after storing the contents,
The present invention relates to a packaging bag that stores air as it is sucked out.

[0002]

2. Description of the Related Art Recently, from the viewpoint of effective use of space in homes and the like, packaging bags for storing bulky items such as blankets and blankets in a compressed state have been used. This packaging bag is made of a plastic film, and one side of the bag body is open, and an intake valve is attached at a predetermined position. Then, after inserting a futon or blanket from the opening and heat-sealing the opening with an iron or sealing it with a rod-shaped clip, insert the hose of the vacuum cleaner into the intake valve and suck out the air in the bag. It is in a compressed state.

A plastic film packaging bag is also used to store deaerated granular materials such as iron powder, copper powder, and zinc powder, which deteriorate when exposed to oxygen, and certain chemical substances. Has been done. And when storing the contents in such a packaging bag, after filling the contents from the opening on one side of the bag and storing it in the chamber of the vacuum packaging machine as it is, air is drawn to create a vacuum state in the chamber. As a result, one side of the bag is heat-sealed and closed.

[0004]

In the packaging bag for the former use among those described in the prior art, when the opening is heat-sealed with an iron for sealing, ironing is difficult and a sealing failure occurs, resulting in sealing. However, there is a problem that it can only be closed once at the same place, while when using a rod-shaped clip to seal, there is an advantage that it can be repeated, but the operation is troublesome and the sealing is not perfect. Not only is it easy to complete, but there is also the problem that the tip of the clip may break through the fusuma etc., making it inconvenient to use.

The packaging bag for the latter purpose requires a dedicated vacuum packaging machine for performing deaeration and sealing operations when storing the contents, and this machine is used every time the contents are taken out little by little. However, there is a problem that the bag cannot be sealed and degassed at any place. Therefore, it is considered to use the packaging bag with the intake valve as described above for this purpose, but it has not been put into practical use because of the difficulty in opening and closing the opening as described above.

The present invention has been made in view of the above problems, and an object of the present invention is a packaging bag having an intake valve as described above, in which the operation of closing the opening is simple. It is to provide a packaging bag that can be performed.

[0007]

In order to achieve the above object, the present invention provides a packaging bag having one side of a plastic film bag body as an opening and an intake valve provided at a predetermined position. It is characterized by attaching self-adhesive tape on both sides of the inner surface along.

[0008]

In the packaging bag having the above structure, the opening can be repeatedly opened and closed by adhering the self-adhesive tapes to each other.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall perspective view of a packaging bag which is an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. Packaging bag P
Is for storing a futon, and as shown in the figure, it has an opening 2 on one side of a bag body 1 made of a plastic film and an intake valve 3 at a predetermined position. The self-adhesive tape 4 is attached to the opening 2 so as to face both sides of its inner surface.

As the film constituting the bag body 1, a film obtained by laminating a barrier layer 11 made of a stretched nylon (ON) film and a heat fusion layer 12 made of a linear low density polyethylene (LLDPE) film is used. .

On the other hand, the self-adhesive tape 4 has a primer layer on the base material layer 41 side of a base material film 43 formed by laminating a base material layer 41 made of a polyester (PET) film and a heat fusion layer 42 made of an LLDPE film. 44 is provided, and the self-adhesive layer 45 is provided on the primer layer 44. Then, the self-adhesive tape 4 is attached to both sides of the inner surface of the opening 2 in the bag body 1 by adhesive portions 5 by heat sealing.

The procedure for making and attaching the self-adhesive tape 4 will be described. First, as shown in FIG. 3, a urethane-based ink is printed on the PET film side of a base film 43 formed by laminating a PET film and an LLDPE film to form a primer layer 44.
A self-adhesive layer 45 made of butadiene rubber latex and a water-soluble adhesive is applied and formed on the above to prepare a raw material of the self-adhesive tape 4. Then, as shown in FIG. 4, the self-adhesive layer 45 is formed on each of the PET films 6 as the anti-adhesive material.
PE with 2 sheets of self-adhesive tape 4 facing each other
The T film 6 is attached using the static electricity. After pasting, the slitter will give a specified width (eg 70m).
Cut into m) to form a band. When the bag body 1 is made into a bag, as shown in FIG. 5, the belt-shaped body 7 is sandwiched between the films of the bag body 1, and the three bonded portions 8 of the bag body 1 are heat-sealed at the same time. The adhesive layer 42 side of the strip and the inner surface side of the bag body 1 are heat-sealed and attached at the adhesive portion 5. By heat-sealing in this manner, the portions of the adhesive portion 8 indicated by the diagonal lines in FIG.
In the portion corresponding to the strip-shaped portion 7 and the adhesive portion 5, the adhesive layers 42 on both sides of the strip-shaped body 7 and the film of the bag body 1 are bonded. Then, in the vicinity of the opening 2 in the packaging bag P, the self-adhesive layer 45 and the PET film 6 are statically attached to each other as shown in FIG. The intake valve 3 is attached at an appropriate stage.

In the above embodiment, when the two original sheets of the self-adhesive tape 4 are attached to the PET film 6 by using static electricity, both sides of the PET film 6 are corona treated in order to surely attach them. Preferably. Further, if the corona treatment is applied to only one surface, the opening side can be restricted.

The packaging bag P manufactured in the state shown in FIG.
When used, the opening 2 is opened. At this time, PET
The self-adhesive layer 45 is peeled off on one surface of the film 6 to open the film. After opening, the PET film 6 is removed to obtain the state shown in FIG. Then, a futon or blanket is put in through the opening 2 and the self-adhesive layers 45 of the self-adhesive tape 4 are pressed together to be sealed. Then, a hose such as a vacuum cleaner is pressed against the intake valve 3 to suck the air therein, and after sucking the air, the suction valve 3 is closed. As described above, in the use state, the opening 2 is opened and closed by adhering or peeling the self-adhesive layers 45 of the self-adhesive tape 4 facing each other, so that the opening and closing in the sealed state can be repeated. Has become.

In the packaging bag P of the above embodiment, when the adhesive portions 5 and 8 are heat-sealed during bag making, as shown in FIG. You may. By heat-sealing in this way, the portions of the adhesive portion 9 indicated by the diagonal lines in FIG.
Both ends of the opening 2 are more firmly fixed.

The embodiment in which the present invention is applied to the packaging bag P for storing the futon has been described above. The packaging bag P is iron powder,
It can also be used as a simple packaging bag for storing, in a degassed state, granular materials such as copper powder and zinc powder, which deteriorate when exposed to oxygen, and certain chemicals. In this case, it is preferable to use, for the bag body 1, a film having an appropriate barrier property, such as a composite film obtained by laminating a vinylidene chloride-coated polyester film and an LLDPE film, depending on the substance to be stored.

[0018]

As described above, according to the present invention, in a packaging bag having one side of a plastic film bag body as an opening and an intake valve at a predetermined position, both sides of an inner surface along the opening are provided. Since the self-adhesive tape is attached to, the opening can be repeatedly opened and closed by adhering the self-adhesive tapes to each other, which has an advantage that the sealing operation can be easily performed.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a packaging bag that is an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a cross-sectional view showing an original fabric of a self-adhesive tape.

FIG. 4 is a cross-sectional view showing a state in which a raw material of a self-adhesive tape is attached via a PET film.

FIG. 5 is an overall perspective view showing a packaging bag at the time of bag making.

FIG. 6 is a partially enlarged plan view of the vicinity of the end of the opening in FIG.

FIG. 7 is a cross-sectional view near the opening in FIG.

FIG. 8 is a partially enlarged plan view of the vicinity of the end of the opening in the packaging bag of another embodiment.

[Explanation of symbols]

 P packaging bag 1 bag body 2 opening 3 intake valve 4 self-adhesive tape

Claims (1)

[Claims] 1. A packaging bag having one side of a plastic film bag body as an opening and an intake valve at a predetermined position, wherein self-adhesive tapes are attached to both sides of an inner surface along the opening. And a packaging bag.