JP2008143591A - Self-standing bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-standing bag capable of ensuring the filling of a content of a sufficient amount, and consistently spouting the content from a spouting tool during the spouting, and having the spouting tool of excellent appearance. <P>SOLUTION: A front wall film 2 and a rear wall film 3 are opposite to each other. A film 4 for a lower gusset which is two-folded from a lower side is held from a fold side with a fold 4a being horizontal between the front wall film and a rear wall film. A two-folded film 5 for an upper gusset is held from the fold side with the fold being diagonal from an upper side so that one end of the fold 5a is on upper edges of the front wall film and the rear wall film opposite to each other and over a longitudinal center, and its peripheral edge is heat-sealed to form a lower gusset part 7, a body part 8, and an upper gusset part 9. One upper corner part is diagonally cut to form an inclined edge in the front wall film and the rear wall film, and a base portion of the spouting tool 11 is held between the inclined edges so as to be heat-sealed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a self-supporting bag. More specifically, the present invention is suitable for filling various fluid contents such as liquids, pastes, powders, etc., and taking out the contents from the pouring tool, and can store a sufficient amount of the contents. It is related to the self-supporting bag.

The self-standing bag with the pouring tool has, for example, a structure in which the pouring tool is attached to the upper edge as shown in FIG. 11 or a structure in which the pouring tool is attached to the upper corner as shown in FIG. (For example, refer patent document 1), and the thing of the structure which attached the extraction tool to the upper sheet | seat as shown in FIG. 13 (for example, refer patent document 2) etc. are known.
Japanese Utility Model Publication No. 7-26348 (FIGS. 17 and 20) Japanese Utility Model Publication No. 7-28842

  In the self-supporting bag 51 with the pouring tool shown in FIG. 11, a sufficient filling amount of the contents cannot be secured, and it is difficult to pour the contents from the pouring tool 52. In the self-supporting bag 54 with the pouring tool shown in FIG. 12, a sufficient filling amount of the contents cannot be ensured. In these self-supporting bags 51 and 54, in order to increase the filling amount of the contents, it is conceivable to raise the bag, but this will impair the self-supporting property. If the rigidity of the bag is increased to improve the independence, the material of the bag must be made thicker, which increases the material cost, the manufacturing cost, and the like.

  The self-supporting bag 55 with the pouring tool shown in FIG. 13 can increase the filling amount of the contents, but the pouring tool 56 is not stable when the contents are poured out from the pouring tool 56. Therefore, it is necessary to stabilize the dispensing direction of the contents by holding the dispensing tool 56 in the hand at the time of dispensing the contents, but there is a drawback that the dispensing operation is difficult.

  The present applicant examined the self-supporting bag 57 with the pouring tool shown in FIG. The self-supporting bag 57 has a gusset portion formed at the top and bottom, and a pouring tool 59 attached to the center of the upper end edge 58 a on the front side of the upper gusset portion 58. Although the self-supporting bag 57 can increase the filling amount of the contents, when the contents are poured out from the pouring tool 59, it is difficult to pour out, and the pour direction is unstable. For this reason, the self-supporting bag 57 also needs to hold the pouring tool 59 by hand when the contents are poured out, and stabilizes the pouring direction of the contents, but has a drawback that the pouring operation is difficult.

  This invention was created as a result of earnest research in view of the above situation, and can ensure a sufficient amount of filling, and can stably dispense the contents from the dispensing tool. And it aims at providing the self-supporting bag with the pouring tool which looks good.

  In order to solve the above-described problems, the present invention provides (1) a self-standing bag having an upper gusset portion and a lower gusset portion while the pouring tool is attached to the upper corner portion, and includes a heat-fusible resin layer. The front wall film and the rear wall film having the heat-fusible resin layer are opposed to each other, and the heat-fusible resin layer is disposed between the front wall film and the rear wall film. The lower gusset film folded in half is sandwiched from the fold side with the crease horizontal from below, and the upper gusset film folded in half with the heat-fusible resin layer on the outside has one end of the fold The upper wall film and the rear wall film that are opposed to each other are located at the upper edges of the front wall film and the rear wall film, and are sandwiched from the crease side obliquely from above so as to exceed the longitudinal center. The upper gusset part is formed An upper corner is cut obliquely to form an inclined edge on the front wall film and the rear wall film, and a base portion of a heat-fusible resin pouring tool is sandwiched between the inclined edges and heat sealed. It is characterized by that.

(2) In (1), the opening length of the inclined edge is set to a length exceeding the length of the base of the pouring tool.
(3) In the above (1) or (2), the inclination angle of the fold of the upper gusset film is set to 15 to 45 ° with respect to the fold of the lower gusset film. .
(4) In the above (1), (2) or (3), the heat seal between the folded bi-folded lower gusset film sandwiched between the front wall film and the rear wall film is arcuate. The contents are filled, and the film for the lower gusset is expanded in a ship bottom shape by its own weight.
(5) In the above (1), (2), (3) or (4), obliquely upward and outward from the front film portion and the rear film portion of the front wall film, the rear wall film, and the upper gusset film. An extending portion is formed and heat-sealed, and at the tip of the extending portion, the extending portion of the front wall film and the extending portion of the rear wall film are fused to form a handle. It is characterized by.

Since the present invention is configured as described above, the following effects can be obtained.
When the contents are filled into the self-supporting bag from the pouring tool, first, the lower gusset film expands and swells downward due to the weight of the contents, and the main body swells in a three-dimensional shape accordingly. With the increase, the upper part of the main body swells in three dimensions and the upper gusset film also expands and swells, causing the contents to be placed on the upper part of the main body without causing wrinkles or bending that impairs the independence of the bag. It is possible to fill up the amount of contents, the amount of filling of the contents can be increased, it is self-supporting and looks good, and it is excellent in customer suction. The contents can be filled up to the top of the bag without causing wrinkles or bending, and the self-supporting and good appearance is because the lower gusset film and the upper gusset film expand and swell to the front wall of the main body. This is considered to be due to the reinforcing action for maintaining the three-dimensional state of the film and the rear wall film. Accordingly, it is possible to secure the independence without increasing the thickness of the front wall film and the rear wall film, and the material cost and the manufacturing cost can be reduced.

  In addition, since the pouring tool is attached to the inclined edge portion formed in the upper corner of the free standing bag, in a state where the contents are filled and free standing, a large number of free standing bags are displayed side by side, The pouring tool does not get in the way of other free-standing bags and looks good.

  And if you tilt the self-supporting bag to pour out the contents from the pouring tool, it is possible to pour out, and the upper gusset part has expanded, so it is difficult for the contents to stay at the time of pouring. Can move smoothly and dispense smoothly. In addition, when the contents are low, the front film part of the front wall film and the upper gusset film, the rear film part of the upper gusset film, and the rear wall film are brought into close contact with each other so that the upper gusset film is closed by a fold. If this is done, the contents will flow along the crease, and smooth dispensing will be possible to the end. This is because the contents can be easily poured out by holding the self-supporting bag of the present invention by hand as compared with the self-supporting bags shown in FIGS. 13 and 14.

Moreover, in the conventional self-supporting bag shown in FIGS. 11 and 12, the content could be filled only about 3/5 with respect to the maximum volume inside the bag, but the folds of the upper gusset film as in the present invention were used. When the inclination angle is set to 15 to 45 ° with respect to the fold of the lower gusset film, as will be described later, the filling amount is 10 to 20% or more than the conventional self-standing bags shown in FIGS. Can be increased.
The self-supporting bag of the present invention can be used from a small capacity to a considerably large capacity.

  The best mode for carrying out the invention will be described below, and the present invention will be described in more detail. Of course, the present invention is not limited to the following embodiments.

As the film used in the present invention, a film that can be heat-sealed into a bag, that is, a laminated film having a heat-fusible resin layer that can be heat-sealed on the inner layer side can be generally used. A single layer film that can be heat sealed may be used.
The heat sealable heat-fusible resin layer used for the innermost layer of a laminated film or a single layer film includes a low density polyethylene, a linear low density ethylene-α-olefin copolymer, a linear ultra-low density. Polymerized by polyethylene-α-olefin copolymer, ethylene-vinyl acetate copolymer, polypropylene, ionomer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, metathelon catalyst Ethylene polymers and the like can be used, but are not limited thereto. As the intermediate layer and outer layer in the laminated film, various materials having a melting point higher than that of the heat-fusible resin layer used for the innermost layer can be used, and biaxially oriented polypropylene, propylene-based polymer, biaxially oriented polyamide, Biaxially stretched polyester, non-woven fabric, paper, cellophane, aluminum foil and the like can be exemplified, but are not limited thereto. The heat-fusible resin layer used for the outer layer may be unstretched. In order to improve the gas barrier property of the laminated film, for example, a gas barrier film deposited with silicon oxide, aluminum oxide or the like may be employed. An added film, a film coated with an ultraviolet ray inhibitor, or a film to which various additives are added according to the purpose can be used.
Aluminum foil is used to obtain gas barrier properties, light shielding properties, etc., but is generally used as an intermediate layer.

  From the standpoint of self-supporting properties, it is preferable that the front wall film and the rear wall film have the same thickness. From the viewpoint of easy expansion of the gusset portion during filling, the thickness of the front wall film and the rear wall film may be different from the thickness of the upper gusset film and the lower gusset film. The thickness of the film and the lower gusset film may also be different.

FIG. 1 is a front view showing an embodiment of a self-supporting bag of the present invention, and FIG. 2 is an exploded perspective view.
This self-supporting bag 1 is configured so that the heat-fusible resin layers of the front wall film 2 having a substantially rectangular heat-fusible resin layer and the rear wall film 3 having a heat-fusible resin layer are opposed to each other. The lower gusset film 4 is folded between the front wall film 2 and the rear wall film 3 with the heat-fusible resin layer on the outside, and is sandwiched from the crease side with the crease 4a horizontal from below. The upper gusset film 5 folded in a triangle shape with the fusible resin layer on the outside is sandwiched from the crease side with the crease 5a inclined from above, and is used for the front wall film 2, the rear wall film 3, and the lower gusset The edges of the film 4 and the upper gusset film 5 are aligned and overlapped, and in that state, from the peripheral edge, that is, the edges of the front wall film 2 and the rear wall film 3, the fusion boundary line shown in FIG. Heat up to 6 The lower gusset portion 7, the main body portion 8, and the upper gusset portion 9 are formed, and the upper left corner is cut obliquely to form the inclined edges 2a and 3a on the front wall film 2 and the rear wall film 3, The base 11a of the heat-sealable resin pouring tool 11 is sandwiched between the inclined edges 2a and 3a, and is heat-sealed with a predetermined width along the inclined edges 2a and 3a.

  The widths of the lower gusset film 4, the front wall film 2, and the rear wall film 3 are the same. In the lower gusset portion 7, the front wall film 2 and the rear wall film 3 are fused to each other by the semicircular cutouts 13, 13, 13, 13 provided on the left and right side edges of the lower gusset film 4. . Heat sealing from the edge until the front wall film 2 and the front film portion 4b of the lower gusset film 4 and the rear film portion 4c of the lower gusset film 4 and the rear wall film 3 reach the arc-shaped fusion boundary line 6. When the contents are filled, the lower gusset film 4 is expanded in the shape of a ship bottom by its own weight, and the bag can be made independent. Note that the heat seal pattern of the lower gusset portion 7 is not limited to the arc shape described above, and when the contents are filled, the lower gusset film 4 expands to the bottom of the ship by its own weight, Any shape can be used as long as it can be made independent.

The upper gusset film 5 has a k-point (see FIG. 4 (b)) where the left end of the folded fold 5a exceeds the center of the upper edges 2b and 3b of the front wall film 2 and the rear wall film 3, and the right end is The front wall film 2 and the rear wall film 3 are sandwiched between the front wall film 2 and the rear wall film 3 so as to be positioned at the point s of the right edges 2c and 3c (see FIG. 4B). It is heat-sealed with the sealing pattern shown in FIG.
The length of the upper edge of the upper gusset film 5 is at least a length exceeding 1/2 of the width of the front wall film 2 and the rear wall film 3, more specifically, by obliquely cutting the upper left corner, Between the inclined edges 2a and 3a formed on the front wall film 2 and the rear wall film 3, the inclined edges 2a and 3a having a margin enough to sandwich the base portion 11a of the heat-fusible resin pouring tool 11 are secured. It is set to a length that allows it. In the self-supporting bag 1 shown in FIG. 1, the upper gusset film 5 as well as the front wall film 2 and the rear wall film 3 are cut slightly obliquely to form the inclined edges 2a and 3a. Only the rear wall film 3 may be cut to form an inclined edge.

As in the self-supporting bag shown in FIG. 1, it is preferable that the left end of the fold 5a of the upper gusset film 5 is in the vicinity of the upper ends of the inclined edges 2a and 3a, but this is not restrictive.
Further, the inclination angle θ of the fold 5a when the upper gusset film 5 is sandwiched between the front wall film 2 and the rear wall film 3 and heat sealed (the angle formed with the fold 4a of the lower gusset film). Is approximately 25 °, but is not limited to this.
The angle α of the inclined edges 2a and 3a formed by obliquely cutting the upper left corner is approximately 35 °, but is not limited to this and may be appropriately selected within a range of 30 to 60 °.

In the self-supporting bag 1 shown in FIG. 1, the pouring tool 11 is provided with a pouring nozzle 11b on a boat-shaped base 11a, and a cap 11c is screwed onto a male screw (not shown) provided outside the pouring nozzle 11b. However, the present invention is not limited to this.
The length of the upper edge of the upper gusset film 5, the inclination angle of the fold 5 a of the upper gusset film 5, and the heat seal pattern in the upper gusset portion 9 are the shape, size, filling capacity, and base 11 a of the dispensing tool 11. Various selections are possible according to the shape and size of the bag, the use of the free standing bag, and the like.
The self-supporting bag 1 may be filled with the contents by removing the cap 11c and performing from the pouring nozzle 11b, and tightening the cap 11c after filling.

FIG. 3 is a perspective view showing a state in which the self-supporting bag 1 shown in FIG. 1 is filled with the contents, the contents can be filled up to the upper part of the bag without causing wrinkles or bending, the filling amount is large, and it is self-supporting. It turns out that it is good and looks good.
Although not shown in the drawing, in order to pour out the contents from the pouring tool, it is possible to pour out by simply tilting the self-supporting bag 1 and the upper gusset portion 9 is expanded. It is hard to produce a staying part, and it moves smoothly and can be poured out smoothly. Further, when the contents are reduced, the front wall film 2 and the front film portion 5b of the upper gusset film 5, the rear film portion 5c of the upper gusset film and the rear wall film 3 are brought into close contact with each other, and the upper gusset film 5 Is closed at the crease 5a, the contents will flow along the crease, and smooth pouring can be achieved to the end.

FIG. 4 is an outline of the manufacturing process of the self-supporting bag 1 shown in FIG.
As shown in FIG. 4 (a), the lower gusset film 4 folded in two from below is sandwiched between the front wall film 2 and the rear wall film 3 from the crease side with the fold line 4a horizontal, and folded in two from above. The formed upper gusset film 5 is sandwiched from the crease side with the crease 5a inclined. Next, as shown in FIG. 4B, the lower gusset portion 7 and the main body portion are heat sealed from the peripheral edge, that is, from the edge of the front wall film 2 and the rear wall film 3 to the fusion boundary line 6. 8. Form the upper gusset portion 9. In addition, since an upper left corner part is cut | disconnected in order to form the inclined edge which pinches | interposes the base 11a of the extraction tool 11, it cannot be overemphasized that the heat seal of an upper left corner part can also be abbreviate | omitted.

Next, as shown in FIG. 4C, the upper left corner is obliquely cut to form the inclined edges 2 a and 3 a on the front wall film 2 and the rear wall film 3. Then, the base 11a of the heat-sealable resin pouring tool 11 is sandwiched between the inclined edges 2a and 3a, and heat-sealed along the inclined edges 2a and 3a with a predetermined width as shown in FIG. 4 (d). The self-standing bag 1 shown in FIG. 1 can be obtained by attaching the pouring tool 11.
For example, a heat seal bar may be used for the heat seal.

As shown in FIG. 5, a self-standing bag in which the inclination angle of the fold 5a of the upper gusset film 5 was changed was manufactured, and the change in the filling capacity due to the inclination angle was measured. The self-supporting bag 1 had a height H of 300 mm and a width L of 240 mm, a distance L ₁ from the left edge to the k point was 50 mm, and a distance L ₂ from the k point to the right edge was 190 mm. The inclination angle s1 of the fold 5a of the upper gusset film 5 is 15 °, s2 is 20 °, s3 is 25 °, s4 is 30 °, and s5 is 40 °. For reference, a self-supporting bag without an upper gusset part was manufactured. Each self-supporting bag was filled with water, and the capacity until the water overflowed from the pouring tool in the self-supporting state was defined as the filling amount.
The results are as shown in Table 1.

  FIG. 6 is a perspective view showing another embodiment of the self-supporting bag of the present invention. In the case of a large bag having a large filling amount, the self-supporting bag 21 is formed by protruding a handle 22 for assisting the dispensing of the contents obliquely outward from the upper right corner. More specifically, the handle 22 includes extending portions 23a and 24a extending obliquely upward and outward from the front wall film 23 and the rear wall film 24, and the front film portion 25a and the rear film portion of the upper gusset film 25. Extending portions 25c and 25d extending obliquely upward and outward from 25b are formed and heat-sealed. At the tip of the extending portion, the extending portion 23a of the front wall film 23 and the extending portion 24a of the rear wall film 24 are melted. It is formed by being worn (see FIG. 7).

When pouring the contents, for example, if you hold the handle 22 with your right hand and support the left side of the bottom with your left hand and tilt the free standing bag 21, you can easily pour out the contents even for a large free standing bag. Can be made.
Needless to say, the handle 22 may be used to carry the self-supporting bag 21.

FIG. 7 is an outline of the manufacturing process of the self-supporting bag 21 shown in FIG.
Here, the extended portion 23a of the front wall film 23 and the extended portion 24a of the rear wall film 24 are longer than the extended portions 25c and 25d of the upper gusset film 25 by p and q portions indicated by oblique lines. Therefore, by heat sealing from the fusion boundary line 29 to the periphery, the p portion of the extended portion 23a of the front wall film 23 and the q portion of the extended portion 24a of the rear wall film 24 are fused, as shown in FIG. A handle 22 can be formed. The other details are the same as those described with reference to FIG.

FIG. 8 is a front view showing still another embodiment of the self-supporting bag of the present invention. Since the self-supporting bag 31 is used for a large-sized bag with a large filling amount, a handle 33 is provided for forming the extended portion 32 on the left edge and forming two elongated holes 32a and 32a to facilitate carrying. It is what.
By carrying the long holes 32a and 32a in series, both hands can be put on when carrying the self-supporting bag 31.
In addition, it cannot be overemphasized that the handle 33 may be used in order to assist extraction | pouring.
Since others are the same as that of the self-supporting bag shown in FIG. 1, detailed description is abbreviate | omitted.

When the self-supporting bag of the present invention is relatively large, it can take the form of being self-supporting even when placed on its side.
9 shows a state in which the self-supporting bag 1 shown in FIG. 1 is made to stand on its side, and FIG. 10 shows a state in which the self-standing bag 31 shown in FIG.
By doing so, there is an advantage that even if it is large, it has a low center of gravity and stable independence can be obtained.

It is a front view which shows one Embodiment of the self-supporting bag of this invention. It is a disassembled perspective view of the self-supporting bag shown in FIG. It is a perspective view which shows the state which filled the self-supporting bag shown in FIG. 1 with the content. It is the schematic of the manufacturing process of the self-supporting bag shown in FIG. It is explanatory drawing for measuring the change of the filling capacity at the time of changing the inclination angle of the fold of the upper gusset part in the self-supporting bag shown in FIG. It is a perspective view which shows other embodiment of the self-supporting bag of this invention. It is the schematic of the manufacturing process of the self-supporting bag shown in FIG. It is a front view which shows other embodiment of the self-supporting bag of this invention. It is a perspective view which shows another usage pattern of the self-supporting bag shown in FIG. It is a perspective view which shows another usage pattern of the self-supporting bag shown in FIG. It is a perspective view which shows an example of the self-supporting bag with the conventional extraction tool. It is a perspective view which shows the other example of the conventional self-supporting bag with the extraction tool. It is a perspective view which shows the further another example of the conventional self-supporting bag with the extraction tool. It is a perspective view which shows the self-supporting bag with the extraction tool examined in the case of the creation of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Self-supporting bag 2 Front wall film 2a Inclined edge 3 Rear wall film 3a Inclined edge 4 Film for lower gusset 5 Film for upper gusset 7 Lower gusset part 8 Body part 9 Upper gusset part 11 Extraction tool

Claims (5)

The dispensing tool is attached to the upper corner, and is a self-supporting bag having an upper gusset portion and a lower gusset portion,
The front wall film having a heat-fusible resin layer and the rear wall film having a heat-fusible resin layer are opposed to each other, and between the front wall film and the rear wall film,
The lower gusset film folded in two with the heat-fusible resin layer on the outside is sandwiched from the crease side with the crease horizontal from below,
The upper gusset film folded in half with the heat-fusible resin layer on the outside is located at the upper edge of the front wall film and the rear wall film facing one end of the fold and from above so as to exceed the longitudinal center. It is sandwiched from the crease side with the crease slanted,
The periphery is heat sealed to form a lower gusset part, a main body part, and an upper gusset part,
An upper corner is cut obliquely to form an inclined edge on the front wall film and the rear wall film, and a base portion of a heat-fusible resin pouring tool is sandwiched between the inclined edges and heat sealed. A free-standing bag characterized by that.   The self-standing bag according to claim 1, wherein an opening length of the inclined edge is set to a length exceeding a length of a base portion of the pouring tool.   The self-standing bag according to claim 1 or 2, wherein an inclination angle of the fold of the upper gusset film is set to 15 to 45 ° with respect to a fold of the lower gusset film.   The heat seal with the folded bi-folded lower gusset film sandwiched between the front wall film and the rear wall film is arc-shaped, filled with contents, and under its own weight, the lower gusset film is The self-supporting bag according to claim 1, 2 or 3, characterized in that it expands in the shape of a ship bottom.   The front wall film, the rear wall film, and the front film portion and the rear film portion of the upper gusset film are formed to extend obliquely upward and outward, and are heat-sealed. The self-supporting bag according to claim 1, 2, 3, or 4, wherein a handle is formed by fusing the extended portion of the wall film and the extended portion of the rear wall film.

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