Pouch

Abstract

To provide a pouch that suppresses the occurrence of bag rupture caused by film damage around the spout attachment point during inverted drops. [Solution] The pouch 10 comprises a front film 30, a back film 40, a first lateral gusset film 50, a second lateral gusset film 60, and a side portion 90. On the imaginary line L3 of the side portion 90, a bending guidance region 92 and an unsealed region 93 are provided. The bending guidance region 92 is a region that guides the bending of the film by the boundary between a bending guidance seal portion 92a and a bending guidance unsealed portion 92b, which extends along the imaginary line L3.

Description

Technical Field

[0001] The present invention relates to a pouch having a side portion which is an outer portion of a side seal.

Background Art

[0002] Conventionally, the applicant has proposed, in Patent Document 1, a pouch having a side portion which is a portion where a front film and a first side margin film overlap or a portion where a back film and a first side margin film overlap on the outside of a first side seal as a container for containing a content liquid such as drinking water or liquid detergent.

Prior Art Documents

Patent Documents

[0003]

Patent Document

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in such a pouch, in order to improve the seating property of the pouch when the pouch is placed with the pouch bottom facing down, the film is guided to bend well in the vicinity of the pouch bottom. However, it has been found that if the film is similarly guided to bend in the side portion, bag breakage may occur due to this.

[0005] Therefore, the present invention solves these problems, and an object thereof is to provide a pouch having a simple structure that improves the seating property while suppressing bag breakage.

Means for Solving the Problems

[0006] The pouch of the present invention comprises a front film, a back film facing the front film in the front-to-back direction with the contents storage area in between, a first side gusset film heat-sealed to the front film and the back film by a first side seal, a second side gusset film positioned facing the first side gusset film in the front-to-back direction with the contents storage area in between, and heat-sealed to the front film and the back film by a second side seal, and a side portion which is the portion where the front film and the first side gusset film overlap or where the back film and the first side gusset film overlap outside the first side seal, wherein the first side gusset film and the second side gusset film have a front seal region which is heat-sealed to the front film by the first side seal or the second side seal, a back seal region which is heat-sealed to the back film by the first side seal or the second side seal, and the front seal The side portion has a sealed area and a non-sealed area which is the area inside the back-side sealed area, the non-sealed area has a front-side outer edge which is the boundary with the front-side sealed area and a back-side outer edge which is the boundary with the back-side sealed area, the front-side outer edge and the back-side outer edge each have a base edge portion which is spaced apart from each other in the front-back direction and a downward-sloping edge portion which extends from the lower end of the base edge portion to a lower end connecting portion which connects the lower ends of the front-side outer edge and the back-side outer edge, and the first The problem is solved by providing a folding guidance region and an unsealed region on a virtual line extending in the front-rear direction through the lower end of the base edge of the lateral gusset film and the lower end of the base edge of the second lateral gusset film, which guides the folding of the film along the virtual line, and the folding guidance region being a region that guides the folding of the film by the boundary between the folding guidance seal portion and the folding guidance unsealed portion that extends along the virtual line. [Effects of the Invention]

[0007] According to the present invention, it is possible to improve seating comfort while suppressing the occurrence of bag rupture with a simple configuration. [Brief explanation of the drawing]

[0008] [Figure 1] An explanatory diagram showing a pouch according to one embodiment of the present invention placed on a mounting surface. [Figure 2] An explanatory diagram showing the individual films that make up the pouch. [Figure 3] An explanatory diagram showing the first lateral gusset film. [Figure 4] An explanatory diagram showing the second lateral gusset film. [Figure 5] An explanatory diagram showing the upper part of the folded pouch as viewed from the front. [Figure 6] An explanatory diagram showing the lower part of the folded pouch as seen from the front. [Figure 7] An explanatory diagram showing the area around the spout during an inverted fall. [Figure 8] An explanatory diagram showing a modified example of the buckling induction section. [Figure 9] An explanatory diagram showing a modified example of the buckling induction section. [Figure 10] Front view, rear view, top view, bottom view, left side view, and right side view showing one aspect of the pouch. [Figure 11] Reference diagram showing the pouch. [Figure 12] A perspective view showing one form of the pouch. [Modes for carrying out the invention]

[0009] Below, a pouch 10, which is one embodiment of the present invention, will be described with reference to the drawings.

[0010] The pouch 10 is used to contain various liquid contents such as herbicides, drinking water, and liquid detergents. As shown in Figures 1 and 2, it has a pouch body 20 formed into a bag shape by heat-sealing flexible films 30, 40, 50, and 60 to form a seal portion for bag making, an inner film 70 placed inside the pouch body 20 (contents storage portion 21), and a spout 80 attached to the pouch body 20.

[0011] The pouch body 20 is configured as a so-called horizontal gusset type pouch with gussets formed on both sides, and as shown in Figures 1 and 2, it has a front film 30 and a back film 40 arranged opposite each other in the front-to-back direction X with the contents storage section 21 in between, a first lateral gusset film 50 arranged between the front film 30 and the back film 40 on one side of the pouch and heat-sealed to the front film 30 and the back film 40 by a first side seal 22, and a second lateral gusset film 60 arranged opposite the first lateral gusset film 50 in the front-to-back direction Z with the contents storage section 21 in between, and heat-sealed to the front film 30 and the back film 40 on the other side of the pouch by a second side seal 23.

[0012] Each of the films 30, 40, 50, 60, and 70 is formed as a resin film having a heat-sealable layer on at least one side, and is arranged so that the heat-sealable layers face each other at the locations where they are heat-sealed to each other. In Figure 2, etc., the heat-welding areas of each film (30, 40, 50, 60, and 70) are shown as filled in.

[0013] Furthermore, in the control fixing section 27 shown in Figure 1, the inner surfaces of the films 30 and 40 are fixed together. In this embodiment, the first lateral gusset film 50 is partially removed at the control fixing section 27 and the films 30 and 40 are heat-sealed together. However, the fixing method at the control fixing section 27 can be any method, such as using an adhesive or molten resin.

[0014] As shown in FIGS. 1 and 2, the pouch body 20 includes a first side seal 22 formed by heat-sealing both lateral sides of the first lateral gusset film 50 to the films 30 and 40, a second side seal 23 formed by heat-sealing both lateral sides of the second lateral gusset film 60 to the films 30 and 40, a top seal 24 formed by fixing the films 30 and 40 at a position corresponding to the top of the pouch body 20 between the first side seal 22 and the second side seal 23 in the front-rear direction Z and facing the bottom seal 25 across the content accommodating portion 21, a bottom seal 25 formed by fixing the films 30 and 40 at a position corresponding to the bottom of the pouch body 20, and an intermediate seal 26 formed by heat-sealing the films 30 and 40 and the inner film 70. These seals 22 to 26 constitute the seal portions for bag making.

[0015] As shown in FIGS. 5 and 6, the first side seal 22 has a side base portion 22a formed with first base edge portions 54a and 55a described later on the inner side in the front-back direction X thereof, and this side base portion 22a has a base outer edge portion 22b linearly extending along the vertical direction Y on the outer side in the front-back direction opposite to the first base edge portions 54a and 55a.

[0016] When the inner film 70 is provided as in the present embodiment, the top seal 24 and the bottom seal 25 include a portion where the films 30 and 40 are fixed by directly heat-sealing between the films 30 and 40, and a portion where the inner film 70 is interposed between the films 30 and 40 and the films 30, 40, and 70 (between the films 30 and 70, between the inner films 70, and between the films 40 and 70) are heat-sealed to fix the films 30 and 40. If the pouch 10 is formed without providing the inner film 70, the top seal 24 and the bottom seal 25 are composed only of the portion where the films 30 and 40 are fixed by directly heat-sealing between the films 30 and 40.

[0017] As shown in Figure 3, the first lateral gusset film 50 has a first front seal region 51 which is heat-sealed to the front film 30 at the first side seal 22, a first back seal region 52 which is heat-sealed to the back film 40 at the first side seal 22, and a first non-seal region 53 which is the area inside the first front seal region 51 and the first back seal region 52.

[0018] As shown in Figure 3, the first non-sealed area 53 has a first front outer edge 54 which is the boundary with the first front seal area 51, and a first back outer edge 55 which is the boundary with the first back seal area 52. The first lateral gusset film 50 is formed symmetrically (left-right symmetrically) with respect to an imaginary line extending along the vertical direction Y from the center of the front-back direction X of the first lateral gusset film 50. In other words, the first front outer edge 54 and the first back outer edge 55 are formed symmetrically (left-right symmetrically) with respect to the said imaginary line.

[0019] As shown in Figure 3, the first front outer edge 54 and the first back outer edge 55 each have first base edge portions 54a and 55a spaced apart from each other in the front-to-back direction X, first downward inclined edge portions 54b and 55b extending from the lower ends of the first base edge portions 54a and 55a to a first lower end connecting portion 53a connecting the lower ends of the first front outer edge 54 and the first back outer edge 55, and first upward inclined edge portions 54c and 55c extending from the upper ends of the first base edge portions 54a and 55a to a first upper end connecting portion 53b connecting the upper ends of the first front outer edge 54 and the first back outer edge 55.

[0020] The first base edges 54a and 55a are formed to extend linearly along the vertical direction Y, as shown in Figure 3. As shown in Figure 3, the first downward inclined edges 54b and 55b extend inclined in the vertical direction Y so as they move downward, they move inward in the front-to-back direction X (at an inclination angle of approximately 45° in this embodiment). As shown in Figure 3, the first upper inclined edges 54c and 55c extend inclined in the vertical direction Y so as they move upward, they move inward in the front-back direction X (at an inclination angle of approximately 45° in this embodiment).

[0021] As shown in Figure 2, the first lateral gusset film 50 has a first film bend portion 56 which is folded in half in a valley fold shape toward the inside of the pouch along a virtual line extending from the center of the front-to-back direction X of the first lateral gusset film 50 along the vertical direction Y (a bending process is applied to maintain the folded state).

[0022] As shown in Figures 3, 5, 6, 8, and 9, the side base portion 22a is provided with buckling guide portions 57 and 59, which are formed as convex protrusions of a part of the first base edge 54a, 55a or the base outer edge 22b, or as concave recesses of a part of the first base edge 54a, 55a or the base outer edge 22b. Figures 5 and 6 show the buckling guide portions 57 and 59 of this embodiment (buckling guide portions 57 and 59 in which a part of the first base edge portions 54a and 55a is convexly projected), and Figures 8 and 9 show various modified examples of the buckling guide portions 57 and 59.

[0023] The buckling guide unit 57 of this embodiment will be described below. As shown in Figures 2, 3, and 5, the pouch 10 has a convex buckling guide portion 57 formed by welding the first lateral gusset film 50 to the front film 30 or back film 40 so as to protrude inward in the front-to-back direction X from the first base edges 54a, 55a, continuous with the first side seal 22.

[0024] As shown in Figure 3, the buckling guide portion 57 is formed above the vertical Y-center of the first base edges 54a and 55a (side base portion 22a), that is, the lower end of the buckling guide portion 57 is positioned above the vertical Y-center of the first base edges 54a and 55a (side base portion 22a). More specifically, it is preferable that the buckling guide portion 57 is formed such that its lower end is located above a point that is 30% of the vertical length of the first base edge portions 54a and 55a (side base portion 22a) of the first lateral gusset film 50, below the upper end of the first base edge portions 54a and 55a (side base portion 22a) of the first lateral gusset film 50.

[0025] In this embodiment, the buckling guide portion 57 is formed on the inside of the first side seal 22 on both sides in the front-to-back direction X, as shown in Figure 3. The buckling guide portion 57 may be formed only on the inner side of one of the first side seals 22 on both sides in the front-back direction X.

[0026] Furthermore, as shown in Figure 5, the buckling guide portion 57 has a linear edge portion 57a ​​that extends diagonally in a straight line with respect to the vertical direction Y on its lower end side, and the edges of the buckling guide portion 57 other than the linear edge portion 57a ​​are formed in a curved convex shape (R shape).

[0027] Furthermore, the first upper inclined edges 54c and 55c of the first lateral gusset film 50 have a bending-inducing bulge portion 58 that bulges out in a convex shape toward the inside in the front-back direction X, as shown in Figures 3 and 5.

[0028] The bending-inducing bulge 58 guides the position and extension direction of the folds (folds) of the films 30, 40, and 50 formed near the first upper inclined edges 54c and 55c. As shown in Figure 5, in the upper 30% of the formation range of the first upper inclined edges 54c and 55c of the first lateral gusset film 50 in the vertical direction Y, all of the first imaginary lines L1 extending in contact with the bending-inducing bulge 58 are formed to pass below the buckling-inducing section 57 without intersecting it. Furthermore, taking into account deviations in product precision, it is preferable that the bending-inducing bulge portion 58 be formed such that the first virtual line L1 passes at a position at least 2 mm below the lower end of the buckling-inducing portion 57.

[0029] Furthermore, the bending-inducing bulge 58 is formed such that a sloping virtual line (first virtual line L1) that is in contact with the bending-inducing bulge 58 and extends diagonally at an angle of 35° with respect to the vertical direction Y passes below the buckling-inducing portion 57 without intersecting it.

[0030] Furthermore, since there can be countless virtual lines L1 that are in contact with the bending-inducing bulge 58 in the upper 30% range mentioned above, the virtual line L1 shown in Figure 5 is an example of one of the countless virtual lines L1 that exist. Furthermore, as in this embodiment, if a linear edge (linear edge 58a described later) is formed in the upper 30% range described above, the virtual line (first virtual line L1) tangent to the linear edge means a virtual line that is an extension of the linear edge.

[0031] Furthermore, as shown in Figure 5, the bending-inducing bulge portion 58 has a linear edge portion 58a that extends linearly to its upper end, while the edges other than the linear edge portion 58a are formed in a curved convex shape (R-shape). In this way, by forming the straight edge portion 58a described above, even if there is a deviation in product accuracy, it is possible to suppress the curved convex (R-shaped) edge portion of the edge of the bending-inducing bulge portion 58 from overlapping with the fold of the first lateral gusset film 50 (first film bending portion 56). Furthermore, in this embodiment, the curved convex (R-shaped) edge (edge ​​other than the straight edge 58a) of the bending-inducing bulge portion 58 described above is formed with a radius of curvature of R60 (60 mm). However, from the viewpoint of impact resistance (from contents) when dropped, it is preferable to form the edge with a radius of R30 or greater.

[0032] Next, the buckling guide unit 59 of this embodiment will be described. As shown in Figures 2, 3, and 6, the pouch 10 has a convex buckling guide portion 59 formed by welding the first lateral gusset film 50 and the front film 30 or back film 40 so as to protrude inward in the front-to-back direction X from the first base edges 54a and 55a, continuous with the first side seal 22.

[0033] In this embodiment, the buckling guide portion 59 is formed on the inside of the first side seal 22 on both sides in the front-to-back direction X, as shown in Figure 3. The buckling guide portion 59 may be formed only on the inner side of one of the first side seals 22 on both sides in the front-back direction X.

[0034] Furthermore, as shown in Figure 6, the buckling guide portion 59 has a linear edge portion 59a that extends diagonally in a straight line with respect to the vertical direction Y on its upper end side, and the edges of the buckling guide portion 59 other than the linear edge portion 59a are formed in a curved convex shape (R shape).

[0035] As shown in Figure 3, the buckling guide portion 59 is formed below the vertical Y-center of the first base edges 54a and 55a (side base portion 22a), that is, the upper end of the buckling guide portion 59 is positioned below the vertical Y-center of the first base edges 54a and 55a (side base portion 22a). More specifically, it is preferable that the buckling guide portion 59 is formed such that its upper end is located below a position that is 30% of the vertical length of the first base edges 54a and 55a (side base portion 22a) of the first lateral gusset film 50, above the lower end of the first base edges 54a and 55a (side base portion 22a) of the first lateral gusset film 50.

[0036] As shown in Figures 8 and 9 (showing modified examples), the buckling guide portions 57 and 59 may be formed as recessed portions of a part of the first base edge 54a, 55a or the base outer edge 22b. However, from the viewpoint of ensuring the sealing strength of the first side seal 22, it is preferable to form the buckling guide portions 57 and 59 as convex portions of a part of the first base edge 54a, 55a or the base outer edge 22b. Furthermore, as shown in Figures 8 and 9 (showing modified examples), the buckling guide portions 57 and 59 may be formed on the base outer edge portion 22b side. However, from the viewpoint of ensuring design freedom on the base outer edge portion 22b side and considering the buckling direction, it is preferable to consider the buckling guide portions 57 and 59 on the first base edge portions 54a and 55a side. Although a detailed explanation of the various modifications shown in Figures 8 and 9 will be omitted, the configurations of the buckling guide sections 57 and 59 described above using Figures 5 and 6 can also be applied to the various modifications shown in Figures 8 and 9.

[0037] As shown in Figure 4, the second lateral gusset film 60 has a second front seal region 61 which is heat-sealed to the front film 30 at the second side seal 23, a second back seal region 62 which is heat-sealed to the back film 40 at the second side seal 23, and a second non-seal region 63 which is the area inside the second front seal region 61 and the second back seal region 62.

[0038] As shown in Figure 4, the second non-sealed area 63 has a second front outer edge 64 which is the boundary with the second front seal area 61, and a second back outer edge 65 which is the boundary with the second back seal area 62. The second lateral gusset film 60 is formed symmetrically (left-right symmetrically) with respect to a virtual line extending along the vertical direction Y from the center of the front-back direction X of the second lateral gusset film 60. In other words, the second front outer edge 64 and the second back outer edge 65 are formed symmetrically (left-right symmetrically) with respect to the said virtual line.

[0039] As shown in Figure 4, the second front outer edge 64 and the second back outer edge 65 each have second base edge portions 64a and 65a spaced apart from each other in the front-to-back direction X, second downward inclined edge portions 64b and 65b extending from the lower ends of the second base edge portions 64a and 65a to a second lower end connecting portion 63a that connects the lower ends of the second front outer edge 64 and the second back outer edge 65, and second upward inclined edge portions 64c and 65c extending from the upper ends of the second base edge portions 64a and 65a to a second upper end connecting portion 63b that connects the upper ends of the second front outer edge 64 and the second back outer edge 65.

[0040] The second base edges 64a and 65a are formed to extend linearly along the vertical direction Y, as shown in Figure 4. As shown in Figure 4, the second downward inclined edges 64b and 65b extend inclined in the vertical direction Y so as they move downward, they move inward in the front-to-back direction X (at an inclination angle of approximately 45° in this embodiment). As shown in Figure 4, the second upper inclined edges 64c and 65c extend in a vertical direction Y such that they move inward in the front-back direction X as they extend upward.

[0041] As shown in Figure 2, the second lateral gusset film 60 has a second film bend portion 66, which is folded in half in a valley fold shape toward the inside of the pouch along a virtual line extending from the center of the front-to-back direction X of the second lateral gusset film 60 along the vertical direction Y (a bending process is applied to maintain the folded state).

[0042] Furthermore, the second lateral gusset film 60 (the second non-sealed region 63) has a flange-facing region 67 where the flange 81 of the spout 80 is positioned opposite, as shown in Figure 4. In this embodiment, the flange-facing region 67 is formed in an annular shape with a circular outer edge. Furthermore, the second lateral gusset film 60 has a circular spout through-hole 68 formed to penetrate in the film thickness direction, for inserting the dispensing cylinder portion of the spout 80.

[0043] Furthermore, as shown in Figures 2 and 4, the pouch 10 has a curved convex spout lateral seal portion 69 formed by welding the portion of the second lateral gusset film 60 located on the inside of the second base edge portions 64a and 65a in the front-to-back direction X to the front film 30 or the back film 40. As shown in Figure 4, this spout lateral seal portion 69 is formed to be located on a second imaginary line L2 that extends along the front-to-back direction X perpendicular to the second base edge portions 64a and 65a, in contact with the lower end of the flange 81 (flange-facing region 67) in the region between the second base edge portions 64a and 65a.

[0044] In this embodiment, the spout lateral seal portion 69 is formed on the inside of the second side seal 23 on both sides in the front-back direction X, as shown in Figure 4. The spout lateral seal portion 69 may be formed only on the inner side of one of the second side seals 23 on both sides in the front-back direction X.

[0045] In this embodiment, the spout lateral seal portion 69 is formed continuously with the second side seal 23 so as to protrude inward from the second base edges 64a and 65a in the front-back direction X, as shown in Figure 4. The spout lateral seal portion 69 may be formed independently (at a separate location) from the second side seal 23 (second base edge portions 64a, 65a).

[0046] Furthermore, as shown in Figure 4, the spout lateral seal portion 69 has an innermost part 69a located in the innermost position in the front-to-back direction X, and the entirety of this innermost part 69a is located on or below the second virtual line L2. The area where the innermost layer 69a is formed (i.e., between the innermost layers 69a on both sides in the front-back direction X) is prone to sagging (loosening) of the film. However, by positioning the innermost layer 69a on or below the second virtual line L2, it is possible to avoid the sagging of the film affecting the spout 80. In the example shown in Figure 4, the innermost part 69a is formed as a point (vertex), but the innermost part 69a may also be formed as a portion that extends a predetermined distance along the vertical direction Y.

[0047] The inner film 70 is formed as a rectangular (or nearly rectangular) and flexible resin film having a heat-sealed layer on at least one side thereof, and is placed inside the pouch body 20 (contents storage section 21) in a folded state, with predetermined parts of it heat-sealed to the films 30 and 40. As shown in Figure 2, the inner film 70 has a front fixing portion 71 which is fixed to the inner surface of the front film 30 by heat welding, and a back fixing portion 72 which is fixed to the inner surface of the back film 40 by heat welding. Furthermore, as shown in Figure 2, the inner film 70 has an inner film bend portion 73 between the front fixing portion 71 and the back fixing portion 72, which is folded in half along a virtual line extending from the center of the inner film 70 in the front-to-back direction X along the vertical direction Y (a bending process is applied to maintain the folded state). Furthermore, as shown in Figure 2, the inner film 70 has a plurality of film penetration portions 74 formed in the shape of holes that penetrate in the film thickness direction.

[0048] The spout 80 is made of synthetic resin or the like and is attached to the second lateral gusset film 60 (the second non-sealed area 63) of the pouch body 20 to function as a spout for dispensing the contents. It has a flange 81 positioned opposite the second non-sealed area 63 of the second lateral gusset film 60, a dispensing cylinder portion extending perpendicularly to the disc-shaped flange 81 and having a dispensing hole formed therein, and a cap that is detachably attached to the tip of the dispensing cylinder portion. Note that in Figure 1, only the flange 81 of the spout 80 is shown, and the dispensing cylinder and cap of the spout 80 are not shown.

[0049] In this embodiment, the flange 81 of the spout 80 is formed as a disc-shaped (annular) portion with a through hole in its center and a circular outer edge, and is positioned inside the pouch body 20 and at least a portion of it is fixed to the inner surface of the second lateral gusset film 60 by heat welding.

[0050] As can be seen in Figure 4, at least a portion (a portion in this embodiment) of the flange 81 (flange-facing region 67), including the center of the flange 81 (flange-facing region 67) of the spout 80, is positioned opposite the region between the second upward inclined edge 64c of the second front outer edge 64 and the second upward inclined edge 65c of the second back outer edge 65. More specifically, in this embodiment, the flange 81 is positioned facing both the region between the second upward inclined edges 64c and 65c on both sides in the front-back direction X, and the region between the second base edges 64a and 65a.

[0051] As can be seen in Figure 1, the region between the second upward inclined edge 64c of the second front outer edge 64 and the second upward inclined edge 65c of the second back outer edge 65, to which the flange 81 (or at least a portion thereof) of the spout 80 is attached, is a portion that, when viewed in the front-to-back direction X with the pouch 10 placed on the mounting surface with the bottom of the pouch facing downwards, slopes upwards so as it moves towards the inside of the pouch body 20 in the front-to-back direction Z. Therefore, when the pouch 10 is placed on the mounting surface, the dispensing cylinder portion of the spout 80 attached to the above region extends diagonally upwards with respect to the vertical direction Y (and front-to-back direction Z) when viewed in the front-to-back direction X. In other words, it slopes upwards so as it moves towards the outside of the pouch body 20 in the front-to-back direction Z.

[0052] As shown in Figures 1 and 2, the pouch 10 includes a side portion 90 on the outer side of the first side seal 22 in the front-rear direction Z, which is either a portion where the front film 30 and the first lateral gusset film 50 overlap, or a portion where the back film 40 and the first lateral gusset film 50 overlap.

[0053] As shown in Figures 1 and 2, the side portion 90 has multiple handle portions 91 for the user to hold the pouch. In this embodiment, the handle portions 91 are formed as through holes that penetrate the film 30, 50 or film 40, 50 in the film thickness direction.

[0054] In Figure 2, etc., for the sake of technical understanding, the handle portion 91 is shown as being formed without heat welding between the films 30, 40, and 50. However, in this embodiment, the handle portion 91 is formed by overlapping the films 30, 40, and 50 and heat welding them at predetermined locations, and then punching out the predetermined locations.

[0055] As shown in Figure 6, on the third imaginary line L3 in the side portion 90, there is a bending guidance region 92 that guides the bending of the films 30, 40, and 50 on the third imaginary line L3, and an unsealed formation region 93 on the third imaginary line L3 in which an unsealed portion 93a is formed. Here, the third imaginary line L3 is an imaginary line that extends along the front-to-back direction Z, perpendicular to the base edges 54a, 55a, 64a, 65a, passing through the lower ends of the first base edges 54a, 55a of the first lateral gusset film 50 and the lower ends of the second base edges 64a, 65a of the second lateral gusset film 60, as shown in Figure 6, when the films 50, 60 are folded in half to make the films 30, 40 flat.

[0056] As shown in Figure 6, the bending guidance region 92 is a region that guides the bending of films 30, 40, and 50 by the boundary between the bending guidance sealing portion 92a and the bending guidance unsealed portion 92b, which extend along the third imaginary line L3. In this embodiment, the bending guide seal portion 92a is formed below the third virtual line L3, as shown in Figure 6, and the bending guide unsealed portion 92b is formed above the third virtual line L3. Alternatively, the bending-guiding seal portion 92a may be formed on the upper side of the third virtual line L3, and the bending-guiding unsealed portion 92b may be formed on the lower side of the third virtual line L3.

[0057] As shown in Figure 6, the unsealed region 93 is a region on the third virtual line L3 in which an unsealed portion 93a is formed, and is formed between the first side seal 22 and the bending guide region 92 in the direction of extension of the third virtual line L3.

[0058] In the pouch 10 of this embodiment obtained in this way, the flange 81 of the spout 80 is positioned facing both the region between the second upward inclined edge portions 64c, 65c on both sides in the front-to-back direction X and the region between the second base edge portions 64a, 65a. It has a spout lateral seal portion 69 formed by welding the portion of the second lateral gusset film 60 located on the inside of the second base edge portions 64a, 65a in the front-to-back direction X to the front film 30 or the back film 40. The spout lateral seal portion 69 is formed to be located on a second imaginary line L2 that extends along the front-to-back direction X, in contact with the lower end of the flange 81 in the region between the second base edge portions 64a, 65a. This makes it possible to loosen the tension of the second lateral gusset film 60 near the second imaginary line L2, thereby suppressing bag tearing caused by a strong crease F (shown in Figure 7) forming on the second lateral gusset film 60 near the second imaginary line L2 when the pouch 10 with the spout 80 attached falls with its upper side (top seal 24 side) facing downwards. In other words, when the bag is dropped upside down, as shown in Figure 7, the second lateral gusset film 60 bulges outward due to the pressure of the contents on the side of the spout 80 that is in the vertical Y-direction (location A in Figure 7) relative to the flange 81 of the spout 80. In this state, if the spout 80 tilts due to contact with the floor or the like, such as to increase the angle between the axis of the second lateral gusset film 60 (the area between the second base edges 64a and 65a) and the spout 80, a strong (deep) fold (indentation) F may be formed in the second lateral gusset film 60 near the second imaginary line L2, as shown in Figure 7. As a result, the end of the fold F (the end in the front-to-back direction X) may strike the second base edges 64a and 65a of the second side seal 23, causing the second lateral gusset film 60 to puncture and the bag to tear at location B in Figure 7. Furthermore, in this embodiment, by forming the spout lateral seal portion 69 described above, it is possible to loosen the tension of the second lateral gusset film 60 near the second virtual line L2, thereby suppressing the occurrence of bag rupture as described above.

[0059] Furthermore, since the spout lateral seal portion 69 is formed continuously with the second side seal 23 so as to protrude inward from the second base edges 64a and 65a in the front-back direction X, it is possible to prevent contents from remaining between the second side seal 23 and the spout lateral seal portion 69, which tends to occur when the spout lateral seal portion 69 is formed independently of the second side seal 23.

[0060] Furthermore, since the spout lateral seal portion 69 is formed on the inside of the second side seal 23 on both sides in the front-back direction X, the tension of the second lateral gusset film 60 near the second imaginary line L2 can be reliably relieved.

[0061] Furthermore, the pouch 10 of this embodiment is provided with a side portion 90 on the outside of the first side seal 22, on which a handle portion 91 is formed, and buckling guide portions 57 and 59 are formed on the first side seal 22. As a result, when the pouch 10 falls upright with the upper side (top seal 24 side) facing upwards, or when the pouch 10 with the spout 80 attached falls inverted with the upper side (top seal 24 side) facing downwards, the buckling guide portions 57 and 59 trigger buckling of the first side seal 22 and the side portion 90, thereby dispersing the impact of the fall and suppressing the occurrence of tearing in the pouch 10. In other words, the side portion 90 is a part of the film that is widened in the film width (width in the front-to-back direction) in order to form the handle portion 91. As a result, it is a part of the film that has rigidity, and if the buckling guide portions 57 and 59 are not formed, the shape of the side portion 90 will be maintained even when the pouch 10 collides with the floor or the like when it falls upright. In particular, when it falls upright, the load will concentrate near the lower end of the first base edge portions 54a and 55a of the first side seal 22 (location C shown in Figure 6), which may cause the bag to rupture. Therefore, in the pouch 10 of this embodiment, by forming the buckling guide portions 57 and 59 described above, when the pouch falls upright, the buckling guide portions 57 and 59 act as a trigger to cause the first side seal 22 and the side portion 90 to buckle (deform their shape), thereby dispersing the impact of the fall and suppressing the aforementioned bag tearing.

[0062] Furthermore, because the buckling guide portion 57 has a straight edge portion 57a ​​on its lower end side, it is possible to suppress the concentration of load at a single point when the first side seal 22 is buckled using the buckling guide portion 57 as a trigger.

[0063] Furthermore, because the buckling guide portion 59 has a straight edge portion 59a on its lower end side, it is possible to suppress the concentration of load at a single point when the first side seal 22 is buckled using the buckling guide portion 59 as a trigger.

[0064] Furthermore, since the buckling guide portions 57 and 59 are formed on the inside of the first side seals 22 on both sides in the front-to-back direction X, the first side seals 22 and the side portions 90 on both sides in the front-to-back direction X can be buckled during upright or inverted drops.

[0065] Furthermore, because the lower end of the buckling guide portion 57 is located above a point that is 30% of the vertical length of the first base edges 54a and 55a, the first side seal 22 (and side portion 90) can be properly buckled when the vehicle falls upside down.

[0066] Furthermore, because the upper end of the buckling guide portion 59 is located below a point that is 30% of the vertical length of the first base edges 54a and 55a, the first side seal 22 (and side portion 90) can be properly buckled when the object is dropped upright.

[0067] Furthermore, in the pouch 10 of this embodiment, at least a portion of the flange 81 of the spout 80 is positioned facing the area between the second upward inclined edges 64c and 65c on both sides in the front-back direction X of the second lateral gusset film 60, and a buckling guide portion 57 is formed in the first side seal 22. As a result, when the pouch falls upside down, the buckling guide portion 57 can trigger the buckling (deformation) of the first side seal 22, thereby reducing the load around the spout mounting position of the second lateral gusset film 60 and suppressing rupture of the pouch caused by damage around the spout mounting position of the second lateral gusset film 60. In other words, as in this embodiment, when at least a portion of the flange 81 of the spout 80 is positioned facing the area between the second upward inclined edges 64c and 65c on both sides in the front-back direction X of the second lateral gusset film 60, the area around the spout mounting position of the second lateral gusset film 60 becomes a place that is easily damaged, such as when the spout 80 directly collides with the floor surface during an inverted fall. However, in this embodiment, by forming the buckling guide portion 57 described above, the first side seal 22 on the side opposite to the side to which the spout 80 is attached is buckled, thereby suppressing bag rupture caused by damage around the spout mounting position of the second lateral gusset film 60.

[0068] Furthermore, the first upper inclined edges 54c and 55c of the first lateral gusset film 50 have a bending-inducing bulge 58 that bulges inward in the front-back direction X, and the bending-inducing bulge 58 is formed such that a first imaginary line L1 extending in contact with the bending-inducing bulge 58 passes below the buckling-inducing portion 57 without intersecting it, thereby preventing the bag from tearing due to creases (folds and indentations in the film similar to the crease F shown in Figure 7 above) formed in the front film 30 and back film 40 (and the first lateral gusset film 50) near the first upper inclined edges 54c and 55c when the bag falls upside down. In other words, when the bag falls upside down, if the end of the fold hits the buckling guide portion 57, there is a risk that the bag will rupture starting from the point of contact. However, in this embodiment, by forming the aforementioned bending guide bulge portion 58, the position of the fold is guided to a position where it does not hit the buckling guide portion 57, thereby preventing the occurrence of the bag rupture described above.

[0069] Furthermore, because the buckling guide portion 57 described above is provided, the first side seal 22 (and the side portion 90) can be properly buckled even when the side portion 90 is formed on the outside of the first side seal 22. In other words, the side portion 90 is a part where the film width (width in the front-to-back direction) is wide in order to form the handle portion 91, so the film is rigid and it is a part that easily maintains its shape even when dropped upside down. However, by providing the buckling guide portion 57 described above, the first side seal 22 and the side portion 90 can be buckled properly.

[0070] Furthermore, in the pouch 10 of this embodiment, a bending guidance region 92 that guides the bending of the films 30, 40, and 50 on the third virtual line L3 is provided on the side portion 90, and an unsealed forming region 93 in which an unsealed portion 93a is formed on the third virtual line L3. The bending guidance region 92 is configured to be a region that guides the bending of the films 30, 40, and 50 by the boundary between the bending guidance seal portion 92a and the bending guidance unsealed portion 92b that extends along the third virtual line L3. This allows the films 30, 40, and 50 to be folded well along the third imaginary line L3 by the bending guide region 92, improving the seating stability of the pouch 10 when the pouch 10 is placed with the bottom of the pouch facing downwards. At the same time, it is possible to suppress bag tearing near the lower ends of the first base edges 54a and 55a of the first lateral gusset film 50 when the pouch 10 falls sideways with the side portion 90 facing downwards (i.e., with the right side of the paper surface of the pouch 10 in Figure 6 facing downwards). In other words, if only a bending guide region 92 is formed on the third imaginary line L3 in the side portion 90, the films 30, 40, and 50 will be strongly (firmly) bent on the third imaginary line L3. In this state, when the pouch falls sideways, the portion of the side portion 90 near the third imaginary line L3 becomes a columnar, rigid portion, and when the pouch 10 collides with the floor or the like, the films 30, 40, and 50 may be punctured near the lower ends of the first base edges 54a and 55a of the first lateral gusset film 50 (location C shown in Figure 6), potentially causing the pouch 10 to rupture. Therefore, in this embodiment, by providing an unsealed area 93 on the third virtual line L3 in the side portion 90, it is possible to suppress the part of the side portion 90 near the third virtual line L3 from becoming a columnar, rigid part, thereby preventing the occurrence of the bag rupture described above.

[0071] Furthermore, since the unsealed region 93 is formed between the first side seal 22 and the bending guidance region 92 in the extending direction of the third virtual line L3, it is possible to achieve a good balance between guiding the bending of the film by the bending guidance region 92 and removing rigidity by the unsealed region 93.

[0072] Furthermore, since the bending-guiding seal portion 92a is formed on the lower side of the third virtual line L3 and the bending-guiding unsealed portion 92b is formed on the upper side of the third virtual line L3, the rigidity of the lower side of the third virtual line L3, which functions as the bottom of the pouch when the pouch 10 is placed on it, can also be ensured by the bending-guiding seal portion 92a.

[0073] Although embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design modifications can be made without departing from the present invention as described in the claims. Furthermore, the pouch 10 can be constructed by arbitrarily combining the configurations of the above embodiments and the modified examples described later.

[0074] For example, the pouch 10 may be used, displayed, or transported in an outer case (not shown), or the pouch 10 itself may be used, displayed, or transported without being placed in an outer case (not shown).

[0075] Furthermore, regarding the specific embodiments of each film 30, 40, 50, 60, and 70, as long as they have a heat-weldable layer on at least one side, such as an olefin-based layer like low-density polyethylene or polypropylene, or a polyester-based layer like PET (polyethylene terephthalate), a single heat-weldable layer or any layer laminated on the heat-weldable layer may be used. The materials constituting the laminate may be anything, and can be arbitrarily formed by laminating known materials such as PET, polyesters like PBT (polybutylene terephthalate), polyamides like nylon, polyolefins like polypropylene or polyethylene, aluminum foil, etc. Furthermore, although the above-described embodiment explained that the pouch body 20 is formed from four films 30, 40, 50, and 60, the specific form of the pouch body 20, such as the number of films constituting the pouch body 20, is not limited to the above. For example, a gusset film for the bottom may be separately provided at a position corresponding to the bottom of the pouch. Furthermore, it is not essential to provide both the side gusset films 50 and 60; the pouch 10 may be configured as a gusseted pouch with only one of the side gusset films 50 or 60. Furthermore, the inner film 70 does not need to be provided. Furthermore, in the above-described embodiment, the pouch 10 is configured as a large-capacity pouch with a capacity of 2 to 5 liters, and the spout 80 is configured as a large spout with an outer diameter of 50 to 70 mm for the flange 81. However, the size of the pouch 10 and spout 80 is not limited to these dimensions and can be arbitrarily set according to the embodiment.

[0076] Furthermore, in the embodiments described above, the first front outer edge 54 and the first back outer edge 55 were described as being formed symmetrically (left-right symmetrically) with respect to a virtual line extending along the vertical direction Y from the center of the front-back direction X of the first lateral gusset film 50. However, the first front outer edge 54 and the first back outer edge 55 may be formed asymmetrically. Similarly, in the embodiments described above, the second front outer edge 64 and the second back outer edge 65 were described as being formed symmetrically (left-right symmetrically) with respect to a virtual line extending along the vertical direction Y from the center of the front-back direction X of the second lateral gusset film 60. However, the second front outer edge 64 and the second back outer edge 65 may be formed asymmetrically.

[0077] Furthermore, although the above-described embodiment was explained as having a spout 80, it is also possible to configure the pouch without a spout 80 by cutting at least a portion of the film 30, 40, 50 with scissors or the like to form a dispensing opening for dispensing the contents from the contents storage section 21.

[0078] Furthermore, although the above-described embodiment explained that the flange 81 is formed in the shape of a disc with a circular outer edge, the specific shape of the flange 81 may be anything other than a circular shape, such as a rectangular or polygonal outer edge (flange 81 outer edge). Furthermore, although the flange 81 was described in the above-described embodiment as being fixed to the inner surface of the second lateral gusset film 60, the flange 81 may also be fixed to the outer surface of the second lateral gusset film 60. Furthermore, the method for fixing the flange 81 to the second lateral gusset film 60 may be any method other than heat welding, such as adhesive bonding.

[0079] In this specification, terms such as "top," "bottom," and "side" are used to indicate top and bottom. However, these terms do not limit the orientation of the pouch 10 during display or transport. For example, the pouch 10 may be placed on the surface with its sides or top facing downwards during display or transport.

[0080] Furthermore, in the embodiments described above, the handle portion 91 was described as being formed in the shape of a through-hole for the user to grasp the pouch body 20 by passing their hand or fingers through it. However, the specific form of the handle portion 91 is not limited to the above, and any form suitable for the user to hold the pouch is acceptable. For example, the handle portion 91 may be formed in the shape of a notch cut out from the outer edge of the film inwards from the side portion 90, or the handle portion 91 may be provided on the side portion 90 by fixing a separate film or the like to the side portion 90 instead of forming a through hole or notch in the side portion 90. Furthermore, the number and position of the handle portions 91 are not limited to those of the embodiments described above.

[0081] [Description of the design] This product is a spouted packaging container for liquid storage, with two handles that can be firmly grasped with both hands for easy dispensing. The handles have holes, making them easily recognizable as handles. By folding back the film portion of the handle holes, the hands do not directly touch the edges when gripping, carrying, or dispensing the contents, thus reducing discomfort. The container of the present invention is a pouch having a gusset, comprising a pouch body and inside the pouch body The pouch body comprises an inner film 70 arranged on either side of the contents storage section and a first and second attachment section facing each other across the contents storage section. The inner film 70 has a first attachment section fixed to the first attachment section and a second attachment section fixed to the second attachment section. This prevents the first and second attachment sections of the pouch body, which face each other across the contents storage section, from separating, thereby maintaining the overall shape of the pouch containing the contents and suppressing so-called body bulging, which occurs in the lower part of the pouch body due to the weight of the fluid contents such as drinking water. The inner film 70 has multiple perforated flow sections formed through its front and back directions to allow the contents to flow. Even if the contents storage section is divided into multiple (two) spaces, the contents can still flow. In Figure 11, at least one of the left and right lateral gusset films has a downward inclined edge portion which includes a folding guide portion and lower end connecting portions 54b-1, 55b-1, 64b-1, and 65b-1 that connect the lower end of the folding guide portion to the lower end connecting portions 53a and 63a. The lower end connecting portions 54b-1, 55b-1, 64b-1, and 65b-1 connect the lower end of the folding guide portion to the lower end connecting portions 53a and 63a such that the lower end connecting portions 53a and 63a are located below the first virtual intersection point P where the central virtual line passing through the upper end connecting portion and the lower end connecting portions 53a and 63a intersects with the virtual line defined by the folding guide portion. The bottom seal 25 has a folding control seal portion 25a located above both its left and right ends. This suppresses the occurrence of delamination near the lower end connection portions 53a and 63a of the lateral gusset film. In Figure 11, the pouch is provided with a gripping film penetration portion 91 on the side portion 90 formed on the outside of the first side seal portion 22. The side portion 90 has a shape-retaining seal portion S1 formed along the outer edge of the side portion 90. At least a part of the film penetration portion 91 is provided on the inner unsealed portion formed between the outer edge of the side portion 90 and the first side seal portion 22. The outer region of the penetration portion of the side portion 90 located on the outside of the pouch is provided with an outer unsealed portion S2 formed to be in contact with the outer edge of the side portion 90. This improves the tear resistance of the pouch. Furthermore, by forming the gripping seal portion S3, localized bending of the film is suppressed, and when the user puts their finger through the film penetration portion 91 to lift the pouch, it is possible to prevent the locally bent portion of the film from digging into the user's finger. In Figure 11, the portion indicated by the symbol F is an unsealed portion where the films are not heat-sealed together, and is used for alignment during production. However, this portion indicated by the symbol F may also be a sealed portion where the films are heat-sealed together. [Explanation of symbols]

[0082] 10... Pouch 20... Pouch body 21 ··· Contents storage compartment 22 ··· First side seal 22a ··· Side base section 22b ··· Outer edge of the base 23... Second side seal 24 ··· Top seal 25 ··· Bottom seal 26... Intermediate seal 27 ··· Control fixing part 30 ··· Front film 40 ··· Backside film 50 ··· First lateral gusset film 51 ··· First front side seal area 52 ··· First back side seal area 53 ··· First non-sealed area 53a... 1st lower end connection part 53b... 1st upper end connection part 54 ··· First outer edge 54a ··· First base edge 54b ··· First downward inclined edge 54c ··· First upper inclined edge 55 ··· First rear outer edge 55a ··· First base edge 55b ··· First downward inclined edge 55c ··· First upper inclined edge 56 ··· First film bending section 57 ... Buckling induction part 57a ··· Straight edge 58...bending guide bulge 58a ··· Straight edge 59 ... Buckling induction part 59a ··· Straight edge 60 ··· Second lateral gusset film 61 ··· Second front side seal area 62 ··· Second back side seal area 63 ··· Second non-sealed area 63a... 2nd lower end connection part 63b... 2nd upper end connection part 64 ··· Second outer edge of the front side 64a ··· Second base edge 64b ··· Second downward inclined edge 64c ··· Second upper inclined edge 65 ··· Second rear outer edge 65a ··· Second base edge 65b ··· Second downward inclined edge 65c ··· Second upper inclined edge 66... ​​Second film bending section 67 ··· Flange opposing area 68 ··· Through hole for spout 69 ··· Spout side seal 69a... Innermost 70 ··· Inner film 71 ...Front side fixed part 72 ··· Backside fixing part 73 ··· Inner film bend 74 ··· Film penetration 80 ··· Spout 81 ··· Flange 90 ··· Side section 91 ··· Handle part 92...bending guidance area 92a ··· Folding guide seal section 92b ··· Unsealed section for bending guidance 93 ··· Unsealed area 93a ··· Unsealed section X ··· Front and back directions Y... Vertical direction Z... Front-back direction L1 ··· First virtual line L2 ··· Second virtual line L3 ··· Third virtual line

Claims

1. A pouch comprising: a front film; a back film facing the front film in the front-to-back direction with the contents storage area in between; a first lateral gusset film heat-sealed to the front film and the back film by a first side seal; a second lateral gusset film positioned facing the first lateral gusset film in the front-to-back direction with the contents storage area in between, and heat-sealed to the front film and the back film by a second side seal; and a side portion outside the first side seal where the front film and the first lateral gusset film overlap or where the back film and the first lateral gusset film overlap, The first lateral gusset film and the second lateral gusset film have a front seal region that is heat-sealed to the front film in the first side seal or the second side seal, a back seal region that is heat-sealed to the back film in the first side seal or the second side seal, and a non-seal region which is the area inside the front seal region and the back seal region. The non-sealed region has a front outer edge which is the boundary with the front sealed region and a back outer edge which is the boundary with the back sealed region. The front outer edge and the back outer edge each have a base edge portion that is spaced apart from each other in the front-back direction, and a downward inclined edge portion that extends from the lower end of the base edge portion to a lower end connecting portion that connects the lower ends of the front outer edge and the back outer edge. In the side portion, along a virtual line extending in the front-rear direction through the lower end of the base edge of the first lateral gusset film and the lower end of the base edge of the second lateral gusset film, a bending guidance region for guiding the bending of the film along the virtual line and an unsealed formation region where an unsealed portion is formed along the virtual line are provided. The pouch is characterized in that the aforementioned bending guidance region is a region that guides the bending of the film by the boundary between a bending guidance sealed portion and a bending guidance unsealed portion, which extends along the imaginary line.

2. The pouch according to claim 1, characterized in that the unsealed region is formed between the first side seal and the bending guide region in the direction of extension of the virtual line.

3. The aforementioned bending guide seal portion is formed below the dashed line, The pouch according to claim 1, characterized in that the unsealed portion that guides the bending is formed above the imaginary line.

Images