JP2006111310A - Pouch container with spout - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pouch container with a spout capable of preventing occurrence of pinholes and breakage even when a large pressure or impact is applied to the pouch container from the outside.
SOLUTION: In a pouch container 11 with a spout provided with a pouch main body 12 having a folding portion 13 folded inward on both sides and a spout 14 attached to the top of the pouch main body 12, the pouch main body with a spout 14 The folding portion 13 is not overlapped with the seal portion 15a, and the seal line 15d inside the container of the seal portion 15b for closing the top of the pouch body is configured to intersect with the fold line 13a of the folding portion in an inclined state.
[Selection] Figure 1

Description

  The present invention relates to a container for storing liquids and viscous materials such as soft drinks, foods, pharmaceuticals, and detergents, and in particular, a pouch with a spout formed of a flexible sheet material such as a resin film or a laminated film and having a spout. Concerning the container.

  Conventionally, a pouch container with a spout having a pouch body formed of a flexible sheet material and a spout attached by heat sealing to the top of the pouch body is widely used as a container for storing soft drinks and the like. In addition, a gusset type pouch container with a spout having a folded portion that is folded inward on both sides of the pouch body is also widely used. In general, as shown in FIGS. 4 (a) and 4 (b), a gusset-type pouch container with a spout (hereinafter abbreviated as a pouch container) 1 includes a pouch body 2 formed of a flexible sheet material on both sides. The pouch main body 2 is poured by a seal portion 5 formed in a belt-like shape at the top of the pouch body 2. While adhering to the boat-shaped part 4a of the exit 4, the top part of the pouch body 2 was closed. In the figure, reference numeral 6 denotes a seal part for bonding the sheet material on both sides of the pouch body 2 to the sheet material forming the folding part 2 and a seal part for closing the bottom part of the pouch body 2. Further, as shown in FIG. 5 (a), a pouch container 1A is also known in which the seal portion 5A formed on the top of the pouch body 2 has a shape with a wide seal area at both ends, and air is less likely to accumulate at the corners. Yes.

  However, in the pouch containers 1 and 1A having these structures, when pressure or impact is applied to the container from the outside after filling the contents, the fold 3a of the folding part 3 and the seal part 5 or 5A are at the boundary inside the container. There is a problem that the external pressure and impact are concentrated at the point P where the seal line 5a intersects, and pinholes and breakage are likely to occur.

Therefore, in order to solve this problem, as shown in FIG. 5B, the shape of the seal portion 5B formed on the top of the pouch body 2 is projected inward at the corner portion of the container, and externally. A pouch container 1B is proposed in which a large force is not applied to the point P where the fold line 3a of the folding part 3 and the seal line 5a of the seal part 5B intersect even when a pressure or impact is applied. Patent Document 1). However, also in this pouch container 1B, when a large impact is applied to the pouch container, such as when a box containing the pouch container is dropped during transportation, the fold 3a and the seal line 5a also cross each other. A pinhole or breakage may occur at the point P.
JP 2000-344252 A

  An object of the present invention is to provide a pouch container with a spout that can prevent the occurrence of pinholes and breakage even when a large impact is applied to the pouch container.

  As a result of intensive studies to prevent the occurrence of pinholes and breakage that occur at the intersections between the fold line of the fold portion and the seal line of the seal portion, the present inventors have found the following matters. That is, in the conventional pouch container, as shown in FIGS. 4 and 5, the crease 3a of the folding part 3 and the seal line 5a of the seal part are orthogonal to each other, and stress is concentrated at the intersecting point P. However, it has been found that pinholes and breakage can be greatly suppressed by inclining the seal line at least on one side of the fold with respect to the fold. Also, if the folding part overlaps the seal part that seals the pouch body to the spout due to positioning errors during the manufacture of the pouch container, the seal line and the crease of the seal part to the spout are perpendicular to each other. In addition, pinholes and breakage may occur at the intersections of the two. Therefore, it is effective to prevent the pinhole and breakage from overlapping the sealing part to the spout. I found it.

  The present invention has been made on the basis of such knowledge, and the invention according to claim 1 is a pouch body formed of a flexible sheet material, the pouch body having a folded portion that is folded inward on both sides. And a pouch container with a spout provided with a spout attached by heat sealing to the top of the pouch main body, and the folding portion does not overlap the seal portion to the spout of the pouch main body The seal line at the boundary inside the container of the seal part for closing the top part of the pouch body intersects at least one side of the fold of the folding part in an inclined state with respect to the fold. It is a pouch container with a spout.

  The invention according to claim 2 is a pouch main body formed of a flexible sheet material, the pouch main body having a folding portion folded inward on both sides, and heat-sealed to the top of the pouch main body In a pouch container with a spout provided with a spout, the fold is not overlapped with a seal portion to the spout of the pouch body, and a seal portion for closing the top of the pouch body is provided. A seal line at the inner boundary of the container is extended from both ends of the seal part to the spout in an inclined direction so as to approach the bottom of the pouch body toward the side of the pouch body, and the fold line of the folding part It is a pouch container with a spout characterized by making it cross in an inclined state.

  The invention according to claim 3 is characterized in that, in the pouch container with spout according to claim 1 or 2, the inclination angle θ of the seal line with respect to the fold is set to 15 to 60 °.

  In the pouch container of the present invention, the folding part does not overlap the sealing part to the spout of the pouch body, and the seal line of the sealing part for closing the top part of the pouch body is at least on one side of the fold of the folding part. Since it is inclined with respect to the crease, the stress concentration at the intersection of the boundary line and the crease is suppressed, and even when a large external pressure or impact is applied to the pouch container, there is almost no pinhole or breakage. It does not occur and has the effect of preventing leakage.

  FIG. 1 is a schematic plan view showing a pouch container 11 according to a preferred embodiment of the present invention, and FIG. 2A is a schematic plan view showing the main part of the pouch container 11 with the sheet material on the surface side removed. 2 (b) is a schematic sectional view showing the pouch container 11 as viewed in the direction of arrow AA in FIG. 2 (a), and FIG. 2 (c) is an outline of a hot plate used for sealing the top of the pouch container 11. It is a front view. The pouch container 11 includes a pouch main body 12 formed of a flexible sheet material such as a resin film or a laminated film, and a spout 14 attached by heat sealing to the center of the top thereof. The both sides are provided with the folding parts 13 folded inside. A seal portion 15 is formed at the top of the pouch body 12, and the spout 14 is bonded to the pouch body 12 and the top of the pouch body 12 is closed. Further, the side portion and the bottom portion of the pouch body 12 are closed by a seal portion 16. The spout 14 is attached such that its central axis substantially coincides with the central axis of the pouch body 12. Further, the fold line 13 a of the folding part 13 of the pouch body 12 is formed in parallel to the central axis of the pouch body 12.

  A seal 15 for attaching the spout 14 to the top of the pouch body 12 and closing the top is a seal 15a for attaching the pouch body 12 to the boat-shaped part 14a of the spout 14 and a seal for closing the top of the pouch body 12 on both sides thereof. It has a portion 15b. The seal portion 15a is formed by the spout seal surface 20a at the center of the hot plate 20 (the width is set equal to the width Z of the boat-shaped portion 14a of the spout 14), and the container of the seal portion 15a. The seal line 15c at the inner boundary is formed at a right angle to the central axis of the spout 14 over the entire seal portion 15a. Seal portions 15b on both sides of the seal portion 15a joining the spout 14 to the pouch body 12 are formed by the top seal surfaces 20b on both sides of the hot plate 20 shown in FIG. The seal line 15d inside the container of the seal portion 15b located on both sides of the seal portion 15a is formed in an eight shape from both ends of the seal portion 15a to the spout (that is, from both ends of the boat-shaped portion 14a of the spout 14). That is, it extends in a direction inclined so as to approach the bottom as it goes to both sides of the pouch body, intersects with the fold 13a of the fold 13 in an inclined state, and with respect to the fold 13a in a region outside the fold 13a. It is almost a right angle. In this way, the seal line 15d is inclined with respect to the fold line 13a so that the stress concentration at the point P where the seal line 15d and the fold line 13a overlap can be suppressed, and an impact is applied to the pouch container 11. In addition, it is possible to prevent a pinhole or breakage from occurring at the point P.

  Here, the smaller the angle θ of the seal line 15d with respect to the fold 13a, the greater the effect of preventing pinholes and breakage. However, if this angle θ is made too small, it will be inclined when the positions of the spout 14 and the fold 13a are shifted. In some cases, the seal line 15d cannot be crossed with the crease 13a. Considering these, the angle θ is preferably in the range of 15 to 60 degrees, more preferably in the range of 30 to 60 degrees, and further, as shown in the drawing, 45 degrees. More preferably, it is about. In the region R where the seal line 15d extending from the central seal portion 15a in the shape of an eight-shape is changed in the direction perpendicular to the crease 13a, it is preferable to make the arc shape to smoothly change the direction of stress concentration. Since it can suppress, it is preferable.

  Further, in this pouch container 11, the folding part 13 does not overlap the seal part 15 a to the spout 14 of the pouch body 12. As shown in FIG. 3B, when a part of the folding part 13 overlaps the seal part 15a, the seal line 15c intersects the fold line 13a at a right angle, and the seal line 15c and the fold line 13a overlap. This is to avoid a pinhole or breakage at the point Q, which is likely to occur. By the way, when manufacturing the pouch container 11, various shakes (errors) are generated due to the dimensional error of the apparatus, the backlash of the machine, and the like. In particular, when the spout 11 is positioned at the center of the top of the pouch body 12. The displacement of the spout 11 and the displacement of the crease position due to meandering when forming the fold 13 are caused to a degree that cannot be ignored. Therefore, when designing the pouch container 11, the dimensions of the respective parts are determined so that the crease 13 a does not overlap with the boat-shaped portion 14 a of the spout 14 and is sealed even when the manufacturing shake occurs. . For example, in FIG. 2A, the deviation amount of the center of the spout 14 with respect to the center of the pouch body 12 is ± φ (mm), and the deviation amount of the crease 13a when the folding portion 13 is the folding amount Y (mm). In the case of ± ε (mm), a design interval d between one end of the boat-shaped portion 14a of the spout 14 and the crease 13a adjacent thereto (the amount by which the width of the pouch body 12 is narrowed by inserting the boat-shaped portion 14a is also considered. ) Is set as d ≧ φ + ε. Thereby, even if both the spout 14 and the crease 13a are displaced to the maximum in the direction in which they approach each other, the crease 13a may contact one end of the boat-shaped portion 14a as shown in FIG. It does not overlap the portion 14a. As shown in FIG. 3A, when the fold line 13a is in contact with one end of the boat-shaped part 14a, the seal line 15c of the seal part 15a is perpendicular to the fold line 13a, but the opposite seal line 15d is inclined to the fold line 13a. As a result, the stress concentration at the point P is suppressed, and pinholes and breakage are prevented from occurring.

  Furthermore, specific values of the design of each part of the pouch container 11 are shown in Table 1. In Table 1, the pouch body width X indicates the width in a state where the spout is not inserted. When the boat-shaped portion 14a of the spout 14 is inserted into the pouch main body 12, the width of the pouch main body 12 is reduced because the pouch main body 12 is pushed wide by the boat-shaped portion 14a, and when the pouch main body width X shown in Table 1 is 80 mm, It narrows about 3mm. By adopting the boat-shaped portion width Z shown in Table 1, even if there is an error in manufacturing, the fold 13a may contact one end of the boat-shaped portion 14a as shown in FIG. It does not overlap with 14a, and pinholes and damage can be prevented from occurring.

  As described above, in the pouch container 11 according to this embodiment, the folding part 13 does not overlap the seal part 15a to the spout of the pouch body 12, and the seal part 15b for closing the top part of the pouch body 12 is used. Since the seal line 15d intersects the fold line 13a of the folding part 13 in an inclined state at least on one side of the fold line 13a, the stress concentration at the point P where the seal line and the fold line intersect is suppressed. Even when a large impact is applied to the container, pinholes and breakage hardly occur and leakage can be prevented.

  In the above-described embodiment, the inclined seal line 15d of the seal portion 15b extends from both ends of the seal portion 15a to the boat-shaped portion 14a of the spout 14. This configuration is preferable because the seal line 15d can be inclined and crossed at least on one side of the crease 13a with respect to the crease 13a even if the spout 14 or the crease 13a is displaced. The starting point at which the seal line 15d extends is not necessarily limited to both ends of the seal portion 15a to the boat-shaped portion 14a, but within a range in which the seal line 15d can ensure a state in which the seal line 15d is inclined and intersects at least on one side of the fold. It can be changed as appropriate.

[Example 1]
A pouch container 11 having the shape shown in FIG. 1 was prepared according to the specification shown in Table (1), and filled with 180 cc of liquid. This pouch container 11 is erected and packed in 6 rows x 4 rows, and the boxes are laid down so that the 6 rows are stacked vertically and dropped from a height of 1.5 m. The pouch container that was located and received the greatest impact was inspected for leaks. As a result, 100 pouch containers were inspected, but no leakage occurred.

[Comparative Example 1]
For comparison, as shown in FIG. 3B, a pouch container in which the crease 13a is intentionally overlapped with the seal portion 15a to the boat-shaped portion 14a of the spout 14 is created, and the same drop test as in Example 1 is performed. It was. As a result, 6 out of 12 pouch containers were leaked.

[Comparative Example 2]
The same drop test as in Example 1 was performed on the conventional pouch container shown in FIG. As a result, leaks occurred in 8 of the 12 pouch containers.

  As is clear from the results of Example 1 and Comparative Examples 1 and 2 above, it was confirmed that the present invention can prevent the occurrence of leakage due to pinholes and breakage when a large impact is applied to the pouch container.

1 is a schematic plan view showing a pouch container according to a preferred embodiment of the present invention. (A) is a schematic plan view showing the main part of the pouch container shown in FIG. 1 by removing the sheet material on the surface side, and (b) shows the pouch container as seen in the direction of arrow AA in (a). Schematic sectional view, (c) is a schematic front view of a hot plate used when sealing the top of the pouch container (A) is a schematic plan view of the main part of the pouch container manufactured with the largest deviation between the spout and the fold when the pouch container shown in FIG. 1 is manufactured, and (b) is a fold of the folding part. Schematic plan view of the main part of a pouch container produced by deliberately overlaying the sealing part on the spout (A) is a schematic top view which shows the conventional pouch container, (b) is a schematic sectional drawing which shows the pouch container in the state before sealing in the arrow BB direction of (a). (A), (b) is a schematic top view of the principal part which shows the other example of the conventional pouch container, respectively

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Pouch container with spout 12 Pouch main body 13 Folding part 13a Fold 14 Spout 14a Boat-shaped part 15, 15a, 15b Seal part 15c, 15d Seal line 20 Hot plate

Claims (3)

  A pouch main body formed of a flexible sheet material, comprising a pouch main body having a folding portion folded inward on both sides, and a spout attached by heat sealing to the top of the pouch main body. In a pouch container with a spout, a seal line at the boundary inside the container of the seal part for preventing the folding part from overlapping the seal part to the spout of the pouch body and closing the top of the pouch body The pouch container with a spout is characterized in that at least one side of the fold of the fold-in part intersects with the fold.   A pouch main body formed of a flexible sheet material, comprising a pouch main body having a folding portion folded inward on both sides, and a spout attached by heat sealing to the top of the pouch main body. In a pouch container with a spout, a seal line at the boundary inside the container of the seal part for preventing the folding part from overlapping the seal part to the spout of the pouch body and closing the top of the pouch body From the both ends of the seal part to the spout and extend in a direction inclined toward the bottom of the pouch body toward the side of the pouch body and intersect in a state inclined with respect to the fold of the folding part. A pouch container with a spout characterized by being allowed to flow.   The pouch container with a spout according to claim 1 or 2, wherein an inclination angle θ of the seal line with respect to the fold is 15 to 60 °.

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