JP2001158440A - Packaging bags - Google Patents

Abstract

(57) [Problem] To provide a packaging bag capable of tightly sealing an opening. Still another object of the present invention is to provide a packaging bag that can be resealed and used for preservation when an article to be packaged is left over. SOLUTION: This is a packaging bag made of a synthetic resin film, wherein a lid piece 2 is formed in an opening of a bag body 1 and
Sleeves 3 were continuously provided on both sides of the cover 2, and an adhesive 4 was applied to the inner surfaces of the cover 2 and the sleeve 3. It is preferable that the outer surface of the synthetic resin film is coated with a release treatment agent so that the lid 2 and the sleeve 3 are softly bonded to the bag body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film bag generally called a non-tray package, which is used in place of a conventionally used styrene tray or a package made of PET resin.

[0002]

2. Description of the Related Art Fruits and vegetables sold in supermarkets and department stores are sold in styrene trays or in packages made of PET resin.

[0003] In recent years, due to the problem of reducing the amount of dust, packaging bags made of thin synthetic resin films having a small weight of packaging material have been gradually used instead of the conventional packages.

In this packaging bag, after a roll-shaped synthetic resin film is folded in half along the flow direction, the fold is folded inward to form a W-shaped section perpendicular to the flow direction. Both sides were blown along the contour by the side welder, and the lid piece formed by the rear sheet,
It had the same width as the opening, and an adhesive was applied to the inner surface. Then, the opening of the packaging bag was configured such that the lid piece was adhered to the front sheet with an adhesive and closed.

However, in the conventional packaging bag,
There was a problem that the opening could not be sealed tightly because both ends of the opening swelled due to the elasticity of the film, and a gap was slightly opened at both ends due to displacement of the position where the lid piece was attached.

Further, since the opening is performed by cutting the film with a cut tape or the like, there is a problem that the opening cannot be resealed and cannot be used for preservation when the packaged material is left over.

[0007]

Therefore, in the present invention,
An object of the present invention is to provide a packaging bag which solves the above-mentioned problems and can tightly seal an opening.

Another object of the present invention is to provide a packaging bag in which the opening can be resealed so that it can be used for preservation when the article to be packaged is left.

[0009]

Therefore, according to the present invention, there is provided a packaging bag made of a synthetic resin film, wherein a lid piece 2 is formed at an opening of a bag body 1 and both sides of the lid piece 2 are provided. The sleeves 3 were continuously provided, and the adhesive 4 was applied to the inner surfaces of the lid 2 and the sleeves 3.

With the above construction, the sleeve pieces 3 are provided on both sides of the lid piece 2.
Are continuously provided, so that both ends of the opening of the bag body 1 in which a gap is easily opened can be tightly sealed.

As described in claim 2, after the opening of the bag body 1 is closed with the lid piece 2, both ends of the bag body 1 are bent in a triangular shape, and then the sleeve pieces 3 are adhered to the bag body 1. Is preferred.

In this manner, both ends of the opening of the bag body 1 where the gap is easily opened can be more tightly sealed.

According to a third aspect of the present invention, after the synthetic resin film is bent so that the rear film is longer than the front film, both sides are blown to a predetermined width and the rear film projects. And forming a sleeve 3 by making cuts 5 at both ends of a portion of the rear film protruding from the front film with a fusing blade, and further forming an adhesive on the inner surfaces of the cover 2 and the sleeve 3. 4 was applied, the end of the bag body 1 was bent in a triangle with the end facing the front side, the lid piece 2 was closed, and the sleeve piece 3 was folded toward the back side of the bag body 1 to adhere to the bag body 1. It can also be a packaging bag.

In this manner, not only can both ends of the opening of the bag body 1 where a gap is easily opened be tightly sealed, but also cutting waste can be reduced.

According to a fourth aspect of the present invention, the synthetic resin film has an outer surface coated with a release treatment agent,
It is preferable that the lid piece 2 and the sleeve piece 3 be softly bonded to the bag body 1.

In this way, the lid piece 2 and the sleeve piece 3 can be stuck and peeled to the bag body 1 any number of times, and can be resealed even when opened.

As described in claim 5, it is preferable that the bag main body 1 is a self-supporting square bottom bag whose bottom is gusset-folded.

[0018] In this way, not only the appearance when arranged at the store front is improved, but also the storage state is improved.

[0019]

FIG. 1 is a front view showing a first embodiment of a packaging bag according to the present invention, and FIG. 2 is a perspective view showing a state in which an opening is opened and the bag is erected.

In this packaging bag, the roll-shaped synthetic resin film is half-folded along the flow direction so that the rear film is longer than the front film, and then the folds are folded inward so as to be perpendicular to the flow direction. Formed so that the cross section becomes W-shaped,
It is a square-bottomed bag that has been blown along both sides by a side welder along the contour.

The synthetic resin film used is CP
P film (unstretched polypropylene film), ONy
(Biaxially stretched nylon film) and the like, which can be appropriately selected from heat-weldable materials, but it is preferable to select a commonly used OPP film (biaxially stretched polypropylene film) having good transparency. Further, the outer surface of the synthetic resin film is coated with a release treatment agent.

The release treatment agent to be used is generally selected from commercially available ones. The amount of coating is such that an appropriate adhesive strength can be obtained by the adhesive described below.

The thus-formed packaging bag of the present invention is a bag body 1 having a square bottom self-standing bag with a gusset-folded bottom, and is extended from the rear side of the opening of the bag body 1. The packaging bag includes a cover piece 2 and sleeve pieces 3 provided continuously from both sides of the cover piece 2. The sleeve pieces 3 protrude from the left and right ends of the bag body 1.

Further, on the inner surfaces of the cover piece 2 and the sleeve piece 3,
The adhesive 4 is applied in a strip shape at a slight interval from the upper end. A portion of the upper end where the adhesive 4 is not applied is provided to make it easier to grasp the end when the cover piece 2 and the sleeve piece 3 are peeled off.

Although not shown, a release sheet may be attached to the adhesive 4 before use.

In the thus constructed packaging bag of the present invention, objects to be packaged such as vegetables and fruits are put through the opening of the bag body 1, and the opening is closed by the lid 2. Further, the sleeve 3 is folded back. Then, as shown in FIG. 3, the opening is completely closed. When the sleeve 3 is not provided, both ends of the opening bulge due to the elasticity of the film or the position where the lid 2 is attached is shifted, so that a gap is slightly opened at the end of the opening, but the sleeve 3 covers the opening. Therefore, the gap is completely closed.

To completely close the opening, FIG.
As shown in Fig. 7, the end of the bag body 1 can be folded in a triangle shape toward the back side, and then the sleeve 3 can be adhered to the body and closed.

Further, when the opening is completely closed, the opening is closed with the lid piece 2, then the opening is folded twice with the width of the lid piece 2, and the end of the bag body 1 is turned to the back side. After being bent into a triangle, the sleeve 3 can be adhered to the main body and closed.

At the time of opening, the outer surface of the film is coated with a release treatment agent, and the lid piece 2 and the sleeve piece 3 and the bag body 1 are in a soft adhesive state. No, it is resealable.

When storing a heavy object such as an apple, cardboard may be put on the bottom surface of the bag body 1 and the weight applied to the bottom surface may be dispersed so that it can withstand the weight.

The above is the description of the first embodiment.
A second embodiment will be described with reference to FIG.

The packaging bag of the second embodiment is an example in which the both ends of the bottom are cut straight, instead of being cut diagonally as in the first embodiment, and are more easily self-standing.

The packaging bag of the present invention thus formed is a bag body 1 which is a self-supporting square bottom bag whose bottom is gusset-folded, and extends from the rear side of the opening of the bag body 1. The packaging bag includes a cover piece 2 and sleeve pieces 3 provided continuously from both sides of the cover piece 2. The sleeve pieces 3 protrude from the left and right sides of the bag body 1.

Further, an adhesive 4 is applied to the inner surfaces of the cover piece 2 and the sleeve piece 3 in a belt shape.

As described above, the structure of the upper portion of the packaging bag is the same as that of the first embodiment, and the manner of closing the opening is the same, so that the following description is omitted.

Next, a third embodiment will be described with reference to FIGS.

As in the case of the second embodiment, the packaging bag of the third embodiment is not cut diagonally at both bottoms, but is cut straight, and is provided at both ends of a portion corresponding to the lid piece 2 of the second embodiment. This is an example in which a sleeve 3 is formed by making a cut with a fusing blade.

The details will be described below.

In the packaging bag of the third embodiment, the roll-shaped synthetic resin film is half-folded along the flow direction so that the rear film is longer than the front film, and the folds are folded inward. A cross section perpendicular to the flow direction is formed into a W shape, and the side films are blown straight on both sides to form a bag with a rear film protruding, and a portion of the rear film protruding from the front film. As shown in FIG. 5, cuts 5 are made at both ends with a fusing blade to form sleeve pieces 3.

The sleeve 3 is formed by making a cut 5 with a fusing blade, so that the sleeve 3 is not further split from the portion where the cut 5 is made.

As shown in FIG. 8, the packaging bag of the present invention formed as described above has a bag body 1 which is a self-standing bag with a bottom formed by gusset folding, and an opening at the opening of the bag body 1. The packaging bag includes a lid piece 2 extended from the rear side and sleeve pieces 3 provided on both sides of the lid piece 2.

Material of synthetic resin film, release treatment agent,
Since the pressure-sensitive adhesive is the same as in the above-described embodiment, the following description is omitted.

The packaging bag of the present invention thus constructed does not generate cutting waste and does not waste synthetic resin film as a material.

When using this packaging bag, the bag body 1
9, the end of the bag body 1 is bent in a triangular shape with the end of the bag body 1 facing the front side, and then the cover piece 2 is closed, and the sleeve piece 3 is turned toward the back side of the bag body 1 as shown in FIG. Folded and adhered to the bag body 1 and closed.

[0045]

According to the packaging bag of the present invention, the sleeve pieces 3 are continuously provided on both sides of the lid piece 2 as described above, so that both ends of the opening of the bag body 1 in which a gap is easily opened can be tightly formed. Because it can be sealed, it is hygienic.

If the sleeve 3 is formed as described in claim 3, cutting waste required for forming the sleeve 3 is eliminated, and waste of the synthetic resin film as a material is eliminated. Further, since the cutting is performed by the fusing blade, the synthetic resin film is easy to use without tearing the synthetic resin film from the cut portion.

Further, as set forth in claim 4, the outer surface of the synthetic resin film is coated with a release treatment agent,
If the cover piece 2 and the sleeve piece 3 are made to adhere to the bag body 1 softly, it becomes possible to reseal even if the bag is opened several times. It will be useful.

Further, if the bag body 1 is a self-supporting square bottom bag whose bottom is gusset-folded,
Not only does the appearance when placed in a store improve, but also the storage state improves, making it easy to use and convenient.

[Brief description of the drawings]

FIG. 1 is a front view of a packaging bag of the present invention.

FIG. 2 is a perspective view showing a state in which an opening of the packaging bag according to the present invention is opened and set up.

FIG. 3 is a perspective view showing a state when the opening of the packaging bag of the present invention is closed.

FIG. 4 is a perspective view showing a state when the opening of the packaging bag of the present invention is closed.

FIG. 5 is a front view showing a second embodiment of the packaging bag according to the present invention.

FIG. 6 is a perspective view showing a state in which an opening of a packaging bag according to a second embodiment of the present invention is opened and upright.

FIG. 7 is a front view showing a third embodiment of the packaging bag according to the present invention.

FIG. 8 is a perspective view showing a state in which an opening of a packaging bag according to a third embodiment of the present invention is opened and set up.

FIG. 9 is a perspective view showing a state when an opening of a packaging bag according to a third embodiment of the present invention is closed.

[Explanation of symbols]

 1 Bag body 2 Lid piece 3 Sleeve piece 4 Adhesive 5 Notch

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Teruyoshi Miyake 4-8-21 Komagome, Toshima-ku, Tokyo Within Pal Sales Co., Ltd. (72) Inventor Koji Hashimoto 5-chome Kitsure Nishi, Hirano-ku, Osaka-shi, Osaka No. 41 No. 41, Osaka Packaging Co., Ltd. (72) Inventor Hiroo Shimizu 1-3-5 Nishihonmachi, Nishi-ku, Osaka-shi, Osaka F-term in Suzupack Co., Ltd. 3E064 AA13 AB03 BA30 BC13 FA01 GA06 HM01 HN55 HP01

Claims (5)

[Claims] 1. A packaging bag comprising a synthetic resin film, wherein a lid piece (2) is formed at an opening of a bag body (1), and sleeve pieces (3) are provided on both sides of the lid piece (2). ), And an adhesive (4) is applied to the inner surfaces of the lid piece (2) and the sleeve piece (3). 2. After closing the opening of the bag body (1) with the lid piece (2), both ends of the bag body (1) are bent in a triangular shape, and the sleeve pieces (3) are bonded to the bag body (1). The packaging bag according to claim 1, wherein the packaging bag is used. 3. After folding the synthetic resin film so that the rear film is longer than the front film, the both sides are blown to a predetermined width to form a bag with the rear film protruding. Cut both sides of the part of the side film that protrudes from the front side film with the fusing blade (5), and make a sleeve piece (3).
Is formed, and an adhesive (4) is applied to the inner surfaces of the lid piece (2) and the sleeve piece (3), and the end of the bag body (1) is bent triangularly toward the front side, and then the lid piece (2) is formed. ) Is closed, and the sleeve (3) is folded toward the back side of the bag body (1) so as to adhere to the bag body (1). 4. A film made of a synthetic resin having an outer surface coated with a releasable treating agent so that a lid piece (2) and a sleeve piece (3) are softly adhered to a bag body (1). The packaging bag according to claim 1, 2 or 3, wherein: 5. The bag body according to claim 1, wherein the bag body is a self-supporting square bottom bag whose bottom is gusset-folded.
The packaging bag according to 3 or 4.