JP2000118544A - Bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-supporting bag which can be easily handled in a distribution stage before charge of contents and also can be easily prevented from clogging in the spout when the contents are poured out. SOLUTION: A pair of side wall films 11 and bottom wall films 12 superimposed with each other are sealed to form the bag 10 provided with a spout 14 formed at the peripheral edge. In this case, a shrinkable film member 15 made of thermoplastic resin is arranged between the pair of side wall films 11 so as to cross orthogonally to the pouring direction of the spout 14, and connected to the side face of the side wall films 11. Folding ruled lines 17 are formed along the pouring direction X-X of the spout 14 in the respective side wall films 11 of the spout 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a bag having an improved spout.

[0002]

2. Description of the Related Art A self-standing bag (standing pouch) sandwiches a bottom wall film folded in an inverted V-shape along the bottom of a pair of side wall films which are overlapped with each other. Both sides and a bottom edge are sealed to form a housing portion, and a spout is formed in a peripheral portion thereof.

[0003] In order to improve the ease of pouring, there is a self-standing bag in which a cylindrical tube member is added to the spout, or the spout is formed into a cylindrical shape by air pressure molding or the like.

[0004] In the conventional self-standing bag, before the contents are accommodated, when a large number of self-standing bags are stacked, the portion of the spout formed into a cylindrical shape bulges, and handling is inconvenient.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a self-standing bag that can be easily handled before containing the contents and that can easily prevent the spout from being closed when the contents are poured out.

[0006]

According to the present invention, there is provided a bag comprising a pair of side wall films and a bottom wall film which are overlapped and sealed with each other, and having a spout formed from a peripheral portion thereof. The above object has been achieved by disposing a shrinkable film member intersecting the pouring direction of the spout between films and providing a bag in which the shrinkable film member is bonded to a side surface of the side wall film. Things.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A self-standing bag 10 according to this embodiment is shown in FIG.
As shown in FIG. 5, a pair of side wall films 11 and a bottom wall film 12 made of a flexible film material such as polyethylene are integrated into a bag shape by sealing the edges thereof, and a housing portion 16 for housing contents. Is formed. This self-standing bag 1
A spout piece 13 is provided at the upper end corner of the spout 13 and projects obliquely upward from the edge thereof. When the contents are poured out, the tip of the spout piece 13 is moved along the line A-A. As a result, the spout 14 having an open front end is formed so as to protrude from the edge.

According to the present embodiment, the shrinkable film member 15 is disposed between the pair of side wall films 11 in FIG. 1 so as to extend so as to intersect with the center line XX of the spout 14 in the projecting direction. Both ends 18 of the shrinkable film 15 correspond to the center line X on the inner surface of the side wall film 11.
It is joined at two places on both sides of -X.

The shrinkable film member 15 is made of polyethylene terephthalate, polyvinyl chloride, stretched polystyrene,
A shrink layer made of a thermoplastic resin such as stretched polypropylene, and a welding layer made of polyethylene, polypropylene, etc. provided at least at both ends of the shrink layer,
Further, if necessary, a seal provided with an adhesive layer by applying an adhesive for temporarily fixing the shrinkable film member 15 or a release paper covering the adhesive layer can be used. The shrink layer shrinks by applying heat, and shrinks the shrinkable film member 15 in the longitudinal direction.

The shrinkable film member 15 is removed, for example, by removing release paper, and at a predetermined position close to the spout 14, the shrinkable film member 15 is moved to the center line XX.
After being positioned so as to intersect perpendicularly with the substrate and temporarily fixed by an adhesive layer, both ends 18 thereof are interposed via a welding layer.
Is welded to the inner surface of the side wall film 11 to form a pair of front and back side wall films 11 constituting the self-standing bag 10.
Can be installed between.

According to the self-standing bag 10 of the present embodiment, a pair of shrinkable film members 1
5 are attached to each other (see FIG. 2A), and these shrinkable film members 15 are provided at the same position between the pair of side wall films 11 so as to overlap each other, but are shifted so as not to overlap. May be arranged. Further, it is not always necessary to provide the shrinkable film member 15 on the inner side surface of each side wall film 11. Is also good. Alternatively, both end portions 18 may be attached to both side wall films 11 by welding. Further, the end 18 of the shrinkable film member 15 may be joined and fixed so as to bridge both side wall films 11. With any of the above joining methods, the operation and effect described below can be obtained.

When sealing the edges of the pair of side wall films 11, holes 20 are provided at both ends 18 of one shrinkable film member 15 (see FIG. 2 (b)). When the seal is joined by sandwiching it with 11,
The shrinkable film member 15 can be fixed by bonding the pair of side wall films 11 to each other through the holes without providing a welding layer on the shrinkable film member 15.

According to the self-standing bag 10 of the present embodiment,
Along the projecting direction XX of the spout 14, the side wall film 1
In FIG. 1, three fold lines 17 are formed in the spout 14. The fold line 17 can be easily formed to be easily bent by heat molding or press molding, and the fold line 17 can be formed by making the side wall film 11 easily bendable by the score line.

According to the self-standing bag 10 of the present embodiment, the spout 14 having the above-described structure is used before the contents are stored.
It has a thickness obtained by adding a pair of side wall films 11 and a shrinkable film member 15 interposed therebetween, and since this thickness is substantially the same as the thickness of the main body composed of the pair of side wall films 11, a large number of The spout 14 is not particularly bulky when a large number of sheets are stacked in the horizontal direction, and therefore, it is easy to handle at the distribution stage before the contents are stored.

According to the present embodiment, when the contents are stored in the self-standing bag 10 and used, before or after the contents are stored, the spout 14 is heated to shrink the film. The member 15 is contracted. Due to the shrinkage of the shrinkable film member 15, as shown in FIG. 2A and FIG.
Since the side wall film 11 located therebetween is curved outward and spreads the spout 14, the blockage of the spout 14 is easily avoided.

Further, according to the present embodiment, the shrinkable film member 15 is provided with the center line XX in the pouring direction of the spout 14.
Is extended so as to intersect perpendicularly with the spout 14, so that the spout 14
Can be efficiently exerted, and the fold line 17 is formed in the side wall film 11, so that it is easy to bend outward and the spout 14 can be easily opened further.

The present invention is not limited to the above embodiment, but can be variously modified. For example, the shrinkable film member does not necessarily have to be made of a thermoplastic resin, and may be a film member having water absorption shrinkage and the like. Further, the spout does not necessarily have to project obliquely upward, and the number of shrinkable film members to be attached is not particularly limited.

[0018]

According to the bag of the present invention, it is easy to handle at the distribution stage before the contents are accommodated, and it is possible to easily prevent the spout from being closed when the contents are poured out.

[Brief description of the drawings]

FIG. 1 is a front view showing a self-standing bag according to an embodiment of the present invention.

FIGS. 2 (a) and (b) are cross-sectional views along the line BB in FIG. 1 for explaining an opening state of a spout.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Self-standing bag 11 Side wall film 12 Bottom wall film 13 Spout piece 14 Spout 15 Shrinkable film 16 Housing 17 Folding line 18 End of shrinkable film XX Center line in spout direction of spout

Claims (4)

[Claims] 1. A bag having a pair of superposed side wall films and a bottom wall film sealed and having a spout formed from a peripheral portion, wherein the spout is provided between the pair of side wall films. A bag in which a shrinkable film member is disposed so as to intersect with the pouring direction, and the shrinkable film member is joined to a side surface of the side wall film. 2. The bag according to claim 1, wherein the shrinkable film member is made of a thermoplastic resin and is bonded to an inner surface of the side wall film. 3. The bag according to claim 1, wherein the shrinkable film member is arranged to extend in a direction perpendicular to a pouring direction of the spout. 4. Each of the side wall films of the spout has at least one fold line along the pouring direction of the spout.
The bag according to any one of claims 1 to 3, wherein the bag is formed.