Gusseted pouch

Abstract

To provide a pouch with a gusset which improves bag breakage resistance.SOLUTION: In the gusset-equipped pouch 10 provided with a film-penetrating part 71 for gripping formed in a side part 90 formed outside a first side seal part 22, the side part 90 has a shape-maintaining seal part 91 formed along an outer edge of the side part 90. In the pouch 10 with the gusset, at least a part of the film penetration part 71 is provided in an inner unsealed part 92 formed between the outer edge of the side part 90 and the first side sealed part 22, and an outer unsealed part 96 formed so as to be in contact with the outer edge of the side part 90 is provided in a penetration part outer region 95 of the side part 90 positioned outside the pouch of the film penetration part 71.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a gusseted pouch having a film-penetrating opening for gripping formed in a side portion formed outside a first side seal portion. [Background technology]

[0002] Conventionally, a gusseted pouch having a film-penetrating portion for gripping formed in the side portion formed outside the first side seal portion has been known as a container for storing liquid contents such as drinking water or liquid detergent (see, for example, Patent Document 1).

[0003] In the gusseted pouch disclosed in Patent Document 1, a shape-retaining seal portion is formed along the outer edge of the side portion so that the front film (or back film) that makes up the side portion and the first gusset film do not separate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2024-044526 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the gusseted pouch disclosed in Patent Document 1 has a problem in that if the gusseted pouch is dropped, the outer edge of the side portion where the shape-retaining seal portion is formed will bend on the outside of the pouch at the film penetration portion, and the bent portion may pierce the film that makes up the pouch, causing the bag to tear.

[0006] Therefore, the present invention is intended to solve these problems, and has as its object to provide a gusseted pouch that has a simple structure and improved resistance to tearing. [Means for solving the problem]

[0007] The gusseted pouch of the present invention comprises a top film, a back film facing the top film in a front-to-back direction with a content storage section in between, a first gusset film heat-sealed to the top film and the back film by a first side seal section, a side section which is a region where the top film and the first gusset film overlap outside the first side seal section or a region where the back film and the first gusset film overlap outside the first side seal section, and a film perforation section for gripping formed by penetrating the side section in the film thickness direction, wherein the first side seal section constitutes a bag-making seal section which defines the content storage section, the side section has a shape-retaining seal section formed along the outer edge of the side section, at least a portion of the film perforation section is provided in an inner unsealed section formed between the outer edge of the side section and the first side seal section, and an outer unsealed section formed to contact the outer edge of the side section is provided in an area outside the perforation section of the side section which is located on the outside of the pouch at the film perforation section. In the above-described gusseted pouch, the outer unsealed portion may be formed so as to divide the shape-retaining seal portion in the extending direction thereof. In any of the above gusseted pouches, the outer unsealed portion may be formed over the entire area outside the penetration portion in the extending direction of the shape-retaining seal portion. In any of the above-mentioned gusseted pouches, the outer region of the penetration portion may be a region located laterally outside the film penetration portion, and the shape-retaining seal portion may be formed so as to extend along the vertical direction at a position spaced laterally outside the first side seal portion. In any of the above gusseted pouches, the region outside the penetration part may be a region whose width in the horizontal direction is narrower than its width in the vertical direction. In any of the above gusseted pouches, the side portion has a handle piece separated from the surrounding area by the film perforation portion, and the handle piece has a part of its outer edge connected to the surrounding area by a connecting portion and extends toward the inside of the pouch, and the side portion has a handle seal portion formed on the connecting portion, and the handle seal portion may be formed without being connected to the shape-retaining seal portion at least in the area outside the perforation portion. [Effects of the Invention]

[0008] According to the present invention, the resistance to bag breakage can be improved with a simple configuration. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an explanatory diagram showing a state in which a gusseted pouch according to an embodiment of the present invention is placed on a placement surface. [Figure 2] FIG. 2 is an explanatory diagram showing each film that constitutes the gusseted pouch. [Figure 3] FIG. [Figure 4] FIG. 10 is an explanatory diagram showing a case where an outer unsealed portion is not formed. DETAILED DESCRIPTION OF THE INVENTION

[0010] A gusseted pouch 10 according to one embodiment of the present invention will be described below with reference to the drawings.

[0011] The gusseted pouch 10 is for containing various liquid contents such as herbicides, drinking water, and liquid detergents, and as shown in Figures 1 and 2, it has a pouch body 20 formed into a bag shape by heat-welding flexible films 30, 40, 50, and 60 to form a bag-making seal portion, an inner film 70 placed inside the pouch body 20 (contents storage portion 21), and a spout 80 attached to the pouch body 20.

[0012] The pouch body 20 is configured as a so-called horizontal gusset-type pouch with gusset portions formed on both sides, and as shown in Figures 1 and 2, has a front film 30 and a back film 40 arranged opposite each other in the front-to-back direction X with the content storage section 21 in between, a first 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 section 22, and a second gusset film 60 arranged opposite the first gusset film 50 with the content storage section 21 in between and heat-sealed to the front film 30 and the back film 40 by a second side seal section 23 on the other side of the pouch.

[0013] Each of the films 30, 40, 50, 60, 70 is formed as a resin film having a heat-sealed layer on at least one surface thereof, and is arranged so that the heat-sealed layers face each other at the locations where they are heat-sealed to each other. In FIG. 2 and other figures, the heat-sealed regions of the films 30, 40, 50, 60, and 70 are indicated by solid areas.

[0014] 1 and 2, the pouch body 20 has a first side seal portion 22 formed by heat-sealing both sides of a first gusset film 50 to the films 30, 40, a second side seal portion 23 formed by heat-sealing both sides of a second gusset film 60 to the films 30, 40, a top seal 24 formed by bonding the films 30, 40 between the first side seal portion 22 and the second side seal portion 23 at a position corresponding to the top of the pouch body 20 facing the bottom seal 25 across the content-accommodating portion 21, a bottom seal 25 formed by bonding the films 30, 40 at a position corresponding to the pouch bottom 20a of the pouch body 20, and an intermediate seal 26 formed by heat-sealing the films 30, 40 to an inner film 70. These seals 22 to 26 constitute a bag-making seal portion.

[0015] When an inner film 70 is provided as in this embodiment, the top seal 24 and the bottom seal 25 include a portion where the films 30, 40 are fixed together by directly heat-sealing the films 30, 40 together, and a portion where the inner film 70 is interposed between the films 30, 40 and the films 30, 40, 70 are heat-sealed together to fix the films 30, 40 together. If the gusseted pouch 10 is formed without the inner film 70, the top seal 24 and the bottom seal 25 are made up of only the portions where the films 30, 40 are fixed together by directly heat welding the films 30, 40 together.

[0016] The inner film 70 is formed as a rectangular (or nearly rectangular) flexible resin film having a heat-sealed layer on at least one side thereof, and as can be seen in Figure 2, is placed inside the pouch body 20 (contents storage section 21) in a folded state, with predetermined locations heat-sealed to the films 30 and 40. As shown in FIG. 2, the inner film 70 is formed with a plurality of film perforations 71 formed in the shape of holes penetrating through the film in the thickness direction.

[0017] The spout 80 is formed from a synthetic resin or the like, and is attached to the second gusset film 60 of the pouch body 20 to function as a pouring outlet for the contents. It has a flange arranged opposite the second gusset film 60, a pouring tube portion that extends perpendicular to the disk-shaped flange and has a pouring hole formed therein, and a cap that is removably attached to the tip of the pouring tube portion. As shown in FIG. 2, the second gusset film 60 is formed with a circular through-hole 61 for a spout, through which the cylindrical pouring portion of the spout 80 is inserted.

[0018] In this embodiment, the flange of the spout 80 is formed as a disk-shaped (annular) part with a through hole formed in the center and a circular outer edge (flange outer edge), and is positioned inside the pouch body 20, with at least a portion of it fixed to the inner surface of the second gusset film 60 by heat welding.

[0019] As shown in Figures 1 to 3, the gusseted pouch 10 has a side portion 90 which is the area where the front film 30 and the first gusset film 50 overlap or the area where the back film 40 and the first gusset film 50 overlap on the lateral side Z outside of the first side seal portion 22.

[0020] As shown in Figures 1 to 3, each side portion 90 has a shape-retaining seal portion 91 formed along the outer edge of the side portion 90, an inner unsealed portion 92 formed between the outer edge of the side portion 90 and the first side seal portion 22, a film-penetrating portion 93 for gripping formed by penetrating each side portion 90 in the film thickness direction, a handle piece 94 separated from the surrounding area by the film-penetrating portion 93, a penetrating portion outer region 95 located outside the pouch of the film-penetrating portion 93 (in this embodiment, outside the lateral direction Z), an outer unsealed portion 96 formed in the penetrating portion outer region 95, and a gripping seal portion 97 formed on the connecting portion 94a of the handle piece 94.

[0021] As shown in FIGS. 1 to 3, the shape-retaining seal portion 91 is a portion formed by heat-sealing the films 30 and 50 or the films 40 and 50 at the outer edge of the side portion 90. The shape-retaining seal portion 91 is formed so as to extend along the vertical direction Y at a position spaced outward in the horizontal direction Z from the first side seal portion 22 .

[0022] As shown in Figure 3, the inner unsealed portion 92 is a portion between the outer side of the first side seal portion 22 in the lateral direction Z and the inner side of the shape-retaining seal portion 91 where the films 30 and 50 or the films 40 and 50 are not heat-sealed.

[0023] As shown in FIG. 3, the film perforation portion 93 is formed as a hole that penetrates the films 30, 50 or the films 40, 50 located in each side portion 90 in the film thickness direction. As shown in FIG. 3, at least a portion of the film perforation portion 93 is provided in the inner unsealed portion 92.

[0024] In Figure 2 and other figures, for the sake of ease of technical understanding, the film penetration portion 93 is illustrated as being formed without the films 30, 40, and 50 being heat-sealed together. However, in this embodiment, the films 30, 40, and 50 are heat-sealed together, and then punching is performed at predetermined locations to form the film penetration portion 93.

[0025] The handle piece 94 is intended to prevent the user's fingers from directly touching the inner edge of the film-penetrating portion 93 and causing pain when the user lifts the gusseted pouch 10 by passing their fingers or hand through the hole formed by the film-penetrating portion 93, and as shown in Figure 3, part of the outer edge of the handle piece 94 is connected to the surrounding area by a connecting portion 94a and extends inward in the lateral direction Z. Here, as shown in Figure 3, the connecting portion 94a extends parallel to (part of) the outer edge of the side portion 90 on which the shape-retaining seal portion 91 is formed, and specifically, the connecting portion 94a and the outer edge of the side portion 90 extend along the vertical direction Y.

[0026] In this embodiment, the penetration portion outer region 95 is a region located outside the film penetration portion 93 in the lateral direction Z, as shown in FIG. As shown in FIG. 3, the width of the penetrating portion outer region 95 in the horizontal direction Z is narrower than the width in the vertical direction Y.

[0027] As shown in Figure 3, the outer unsealed portion 96 is an unsealed portion (i.e., a portion where the films 30, 50 or the films 40, 50 are not heat-sealed) formed in the outer region 95 of the through-hole so as to contact the outer edge of the side portion 90, and in this embodiment, is formed so as to divide the shape-retaining seal portion 91 in its extension direction (in this embodiment, the vertical direction Y). In this embodiment, the outer unsealed portion 96 is formed over the entire area of ​​the outer region 95 of the through-hole in the extension direction of the shape-retaining seal portion 91 (vertical direction Y in this embodiment), as shown in Figure 3, but the specific form of the outer unsealed portion 96 is not limited to this, and the outer unsealed portion 96 may be formed only in a partial area of ​​the outer region 95 of the through-hole in the extension direction of the shape-retaining seal portion 91.

[0028] The grip seal portion 97 is a seal portion formed on the connecting portion 94a (that is, a portion where the films 30 and 50 or the films 40 and 50 are heat-sealed). By forming such a gripping seal portion 97, local bending of the films 30, 50 or 40, 50 at the connecting portion 94a is suppressed, and when a user passes their finger through the film-penetrating portion 93 to lift the pouch, the locally bent portion of the film comes into line contact with the user's finger, preventing the weight of the contents from causing the bent portion to dig into the user's finger. From the viewpoint of reinforcing the vicinity of the grip portion, it is preferable that the grip seal portion 97 is formed so that both ends thereof are positioned outside the penetration portion outer region 95 in the longitudinal direction Y, as shown in FIG. As shown in FIG. 3, the gripping seal portion 97 is formed without being connected to the shape-retaining seal portion 91 at least in the outer region 95 of the penetration portion (and its surrounding region) (i.e., formed so that the unsealed portion is located on the outside of the pouch of the gripping seal portion 97), and in this embodiment, is formed independently from the shape-retaining seal portion 91 in the entire region. As a result, if a tear occurs in the gripping seal portion 97 around the handle piece portion 94, the progression of the tear can be stopped at the boundary between the gripping seal portion 97 and the unsealed portion.

[0029] As shown in FIG. 1, the inner surfaces of the films 30 and 40 are bonded together at the control bonding portions 27 formed at the top and bottom of the pouch, thereby preventing the side portions 90 from separating from each other. In this embodiment, the first gusset film 50 is partially removed at the control fixing portion 27 to heat-seal the films 30 and 40, but the fixing method at the control fixing portion 27 may be any method, such as using an adhesive or molten resin.

[0030] In the gusseted pouch 10 of this embodiment obtained in this manner, an outer unsealed portion 96 is provided in the outer region 95 of the penetration portion located outside the film penetration portion 93, which is formed so as to contact the outer edge of the side portion 90.Therefore, if the gusseted pouch 10 is dropped, the outer edge of the side portion 90 bent in the outer region 95 of the penetration portion will not pierce the films 30, 40, 50 that make up the content storage portion 21, thereby preventing the bag from breaking. That is, since the outer region 95 of the penetration portion is located outside the film penetration portion 93, it is an area where bending A of the films 30, 40, 50 as shown in Figure 4 is likely to occur, and if the outer unsealed portion 96 is not formed as shown in Figure 4, the outer edge portion B of the side portion 90 where the shape-retaining seal portion 91 is formed and the film is stiff, which corresponds to the location where bending A occurs, may move inward in the front-to-back direction X as shown by arrow C in Figure 4 and pierce the films 30, 40, 50 that make up the content storage portion 21, causing the bag to tear. In contrast to this, in the gusseted pouch 10 of this embodiment, as shown in Figure 3, an outer unsealed portion 96 formed to contact the outer edge of the side portion 90 is provided in the outer region 95 of the film penetration portion located outside the film penetration portion 93. This not only reduces the film strength at the outer edge of the side portion 90, but also reduces the stiffness of the film on the outer edge side of the side portion 90, making it less likely for the film to bend (localized bending), thereby suppressing the occurrence of bag breakage as described above.

[0031] Furthermore, in the gusseted pouch 10 of this embodiment, the outer unsealed portion 96 is formed so as to divide the shape-retaining seal portion 91 in its extending direction, thereby making it possible to significantly reduce the stiffness of the film caused by the shape-retaining seal portion 91 formed along the outer edge of the side portion 90 in the outer region 95 of the penetration portion, thereby reliably preventing the above-mentioned bag breakage from occurring.

[0032] Although the 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 scope of the present invention as set forth in the claims. Furthermore, the gusseted pouch 10 may be constructed by arbitrarily combining the configurations of the above-described embodiments and the modified examples described below.

[0033] For example, the gusseted pouch 10 may be housed in an outer case (not shown) when in use, displayed, or transported, or the gusseted pouch 10 itself may be used, displayed, or transported without being housed in an outer case (not shown).

[0034] Furthermore, as for specific embodiments of the films 30, 40, 50, 60, and 70, as long as they have a heat-sealable layer made of an olefin such as low-density polyethylene or polypropylene, or a polyester such as PET (polyethylene terephthalate) on at least one side, the heat-sealable layer may be a single layer, or any layer may be laminated on the heat-sealable layer. Any material may be used to form the laminate, and any desired layer may be formed by laminating known polyesters such as PET or PBT (polybutylene terephthalate), polyamides such as nylon, polypropylene, polyolefins such as polyethylene, aluminum foil, etc. Furthermore, in the above-described embodiment, the pouch body 20 is described as being formed from four films, i.e., films 30, 40, 50, and 60. However, the specific aspects of the pouch body 20, such as the number of films constituting the pouch body 20, are not limited to the above. For example, a gusset film for the bottom may be separately provided at a position corresponding to the pouch bottom 20a. Furthermore, the gusseted pouch 10 may be configured as a gusseted pouch provided with only the first gusset film 50, without providing the second gusset film 60. Also, the inner film 70 may not be provided. Furthermore, in the above-described embodiment, the gusseted pouch 10 is configured as a large-capacity pouch with a capacity of 2 to 5 L, and the spout 80 is also configured as a large spout with a flange outer diameter of 50 to 70 mm, but the sizes of the gusseted pouch 10 and the spout 80 are not limited to these and may be set arbitrarily depending on the embodiment.

[0035] Furthermore, in the above-described embodiment, the gusseted pouch 10 is described as having a spout 80, but it may also be configured so that the spout 80 is not provided, and at least a portion of the films 30, 40, 50 is cut with scissors or the like to form a pouring opening for pouring out the contents in the contents storage section 21.

[0036] Furthermore, in the above-described embodiment, the flange is described as being formed in a disk shape having a circular outer peripheral edge, but the specific shape of the flange may be any, such as one having an outer peripheral edge (flange outer peripheral edge) of a shape other than circular, such as a rectangular or polygonal shape. Furthermore, in the above-described embodiment, the flange is described as being fixed to the inner surface of the second gusset film 60, but the flange may be fixed to the outer surface of the second gusset film 60. The flanges may be fixed to the second gusset film 60 by any method other than heat welding, such as adhesion.

[0037] In this specification, terms indicating top and bottom, such as "top," "bottom," and "side," are used, but these terms do not limit the orientation of the gusseted pouch 10 when it is displayed, transported, etc. For example, when it is displayed, transported, etc., the gusseted pouch 10 may be placed on a placing surface with the side or top of the gusseted pouch 10 facing downwards.

[0038] Furthermore, in the above-described embodiment, as shown in Fig. 2 etc., the film perforation portion 93 has been described as being formed in the shape of a hole (or a slit with a width) that penetrates the films 30, 40, 50 in the film thickness direction, but the specific form of the film perforation portion 93 is not limited to the above, and the film perforation portion 93 may be formed as a slit-like cut that penetrates the films 30, 40, 50 in the film thickness direction (a slit-like shape that does not involve material removal and has no width in the direction perpendicular to the extension direction). Note that when the film perforation portion 93 is formed in the shape of a hole (or a slit with a width), the visibility of the film perforation portion 93 can be improved, making it easier to notice the position and existence of the film perforation portion 93.

[0039] In addition, in the above-described embodiment, the gripping seal portion 97 is described as being formed independently from the shape-retaining seal portion 91, but the gripping seal portion 97 may also be formed so as to be continuous with the shape-retaining seal portion 91.

[0040] Furthermore, in the above-described embodiment, the features of the present invention (shape-retaining seal portion 91, inner unsealed portion 92, film perforation portion 93, handle piece portion 94, perforation outer region 95, outer unsealed portion 96, grip seal portion 97, etc.) are described as being provided in the side portion 90, which is the portion where the front film 30 and the first gusset film 50 overlap or the portion where the back film 40 and the first gusset film 50 overlap. However, it is also conceivable that the above-described features of the present invention can be applied to the side portion, where the front film and the back film overlap, outside the bag-making seal portion (i.e., the bag-making seal portion consisting of the top seal portion, bottom seal portion, and side seal portion) that defines the content storage portion 21 in a gusseted pouch such as a so-called flat pouch consisting of a front film and a back film, or a so-called standing pouch consisting of a front film, a back film, and a gusset film. [Explanation of symbols]

[0041] 10 Gusseted Pouches 20 Pouch body 20a Bottom of pouch 21 Contents storage section 22 First side seal part 23 Second side seal part 24 Top seal 25 Bottom seal 26 Intermediate seal 27 Control fixing part 30 ··· Front film 40 ··· Back film 50 ··· First gusset film 60 ··· Second gusset film 61 Spout through hole 70 ··· Inner film 71 Film penetration part 80 ··· Spout 90 ··· Side part 91 Shape-maintaining seal 92 ··· Inside unsealed part 93 Film penetration part 94 · · Handle piece 94a... Connecting part 95 ... Outer area of ​​penetration part 96 ··· Outer unsealed part 97...Gripping seal part X Front and back direction Y: Vertical direction Z... Lateral direction

Claims

1. a first gusset film heat-sealed to the front film and the back film by a first side seal portion; a side portion that is a portion where the front film and the first gusset film overlap or a portion where the back film and the first gusset film overlap outside the first side seal portion; and a film-penetrating portion for gripping formed by penetrating the side portion in the film thickness direction, the first side seal portion constitutes a bag-making seal portion that defines the content-accommodating portion, The side portion has a shape-retaining seal formed along an outer edge of the side portion, At least a portion of the film-penetrating portion is provided in an inner unsealed portion formed between an outer edge of the side portion and the first side seal portion, A gusseted pouch characterized in that an outer unsealed portion formed in contact with the outer edge of the side portion is provided in an outer region of the film penetration portion of the side portion located outside the pouch at the film penetration portion.

2. 2. The gusseted pouch according to claim 1, wherein the outer unsealed portion is formed so as to divide the shape-retaining seal portion in the extending direction thereof.

3. 2. The gusseted pouch according to claim 1, wherein the outer unsealed portion is formed over the entire area outside the penetration portion in the extending direction of the shape-retaining seal portion.

4. the penetration portion outer region is a region located laterally outside the film penetration portion, 2. The gusseted pouch according to claim 1, wherein the shape-retaining seal portion is formed so as to extend along the vertical direction at a position spaced laterally outward from the first side seal portion.

5. The gusseted pouch according to claim 4, wherein the region outside the penetration part is a region whose width in the horizontal direction is narrower than its width in the vertical direction.

6. The side portion includes a grip piece separated from a surrounding area by the film-penetrating portion, The handle piece has a part of its outer edge connected to a peripheral portion by a connecting portion and extends toward the inside of the pouch, the side portion has a grip seal formed on the connecting portion; 2. The gusseted pouch according to claim 1, wherein the grip seal portion is formed without being connected to the shape-retaining seal portion at least in an area outside the penetration portion.

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