JP2008068913A - Gusset bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gusset bag which has a convenient constitution, is excellent in storage in physical distribution, and displaying, and at home, and has high shape retentivities. <P>SOLUTION: The gusset bag consists of a laminated film, and is equipped with a body part consisting of a front face part, a back face part, and a pair of side face folding parts formed so as to be foldable inside between the front face part and the back face part. A stored article is taken out by opening the upper end outlet under a self-standing condition. On the middle region of the body part, overhanging pieces extending in approximately horizontal direction, are formed at least on a pair of opposing faces of the body part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a gusset bag for storing powder, granules or liquid, such as food, detergent, cosmetics or toiletries, and more particularly to a gusset bag having a simple configuration and high shape retention.

  A gusset bag is a bag comprising a pair of front and rear front portions formed from one or a plurality of sheet materials and a pair of left and right side folds that can be folded inside the front portions. From the state where the portion is folded flat, the folded portion in the vicinity of the opening is opened to form a rectangular upper end opening, and various items can be accommodated inside the upper end opening.

These gusset bags are made into a product containing, for example, powdered or granular foods or detergents as containments, and contain the detergent or the like while opening and closing the top outlet by folding or opening the side folds. Has been used repeatedly. Therefore, the gusset bag is required to efficiently and repeatedly take out the contents, and to easily and surely close the take-out port to store the contents effectively, and various proposals have been made. ing.
In Patent Document 1, it is proposed that a vertical linear member that can be plastically deformed is attached from the outlet portion to the trunk portion along the upright side where the front portion and the side folded portion of the gusset bag are connected.
Further, Patent Document 2 proposes to provide a cross-sectional step shape holding part across the folding center line of the side folding part below the upper end outlet of the gusset bag.
Furthermore, Patent Document 3 discloses that a strip-like vertical rib is provided in the central portion of the side folded portion of the gusset bag.
However, these proposals all improve the opening / closing performance of the take-out opening for efficiently and repeatedly taking out the contents, and there has been a demand for a gusset bag having a simple configuration and high shape retention.

JP 2000-168996 A JP 2005-104560 A JP-A-2005-104561

  It is an object of the present invention to provide a gusset bag having a simple configuration and high shape retention that is excellent in logistics, display, and home storage.

  The present invention is made of a laminated film, and includes a body portion including a front portion, a back portion, and a pair of side fold portions formed between the front portion and the back portion so as to be foldable inward. A gusset bag that opens the upper end outlet and allows the contents to be taken out in a state in which the upper portion is taken out. The present invention provides a gusset bag formed on a surface extending in a substantially horizontal direction.

  According to the present invention, it is possible to provide a gusset bag having a simple configuration and high shape retention that is excellent in logistics, display, and storage at home.

Embodiments of the gusset bag of the present invention will be described with reference to the drawings. Drawing 1 is a mimetic diagram showing one mode of a gusset bag of the present invention.
The gusset bag 1 according to the first embodiment of the present invention shown in FIG. 1 is preferably a folding center line 14 between the front part 11, the back part 12 (not shown), and the front part 11 and the back part 12. Is a gusset bag including a body portion 10 including a pair of side surface folding portions 13 formed so as to be foldable inward with respect to a base point, and opening an upper end take-out port 21 in a self-standing state so as to allow removal of the contents. The overhanging piece 30 extending in the substantially horizontal direction is formed in the middle region of the body portion 10 in the height direction. In FIG. 1, the overhanging piece 30 is provided over the entire circumference of the body part 10 across the front part 11, the back part 12, and the pair of side surface folding parts 13. The overhang pieces 30 may be provided on the portion 11 and the back surface portion 12, or the overhang pieces 30 may be provided on the pair of side surface folding portions 13. It is preferable to provide the projecting piece 30 on the entire circumference of the body portion 10 because the shape retention is further improved.
The gusset bag 1 according to the present invention includes a barrel 10 that stores powder, granules, or liquid and an opening 20 that is positioned above the barrel 10, and an upper end outlet for taking out the stored item at the upper end of the opening 20. There are 21. The overhanging piece 30 may be anywhere as long as it is an intermediate region of the trunk portion 10, but in order to improve the shape retention of the entire gusset bag 1, it is preferable to provide the overhanging piece 30 in the intermediate region of the upper portion of the trunk portion 10. . Providing the overhanging piece 30 at a position higher than the storage height of the stored item is particularly preferable in order to further improve the shape retention after storage.
From the same viewpoint, it is preferable to form the opening 20 with the protruding piece 30 as a base point.
In FIG. 1, the overhanging piece 30 is folded downward at the end of the front part 11 or the back part 12 and is continuous with the side folding part 13. The overhanging piece 30 may be cut off at the end of the front surface portion 11 or the back surface portion 12 and may be discontinuous with the overhanging piece 30 of the side surface folding portion 13, but the rigidity of the gusset bag 1 is more continuous as shown in FIG. 1. And shape retention is further improved.

In the present invention, the overhanging piece 30 is an overhanging piece bonded at least at a base continuous with the film at a predetermined width at an edge where the film is bent, or at least a base having a predetermined width at an edge where two films are overlapped This refers to the overhang piece that is joined.
FIG. 2 is a schematic view of a process for forming a projecting piece 30 by bending one film. One film 100 is bent so that the innermost layer 110 faces to form an edge 120 having a predetermined width. As shown in FIG. 2A, the edge portion 120 is sandwiched from the outside, and the joining surface of the innermost layer 110 is thermally fused. For example, as shown in FIG. 2 (A ′), when sandwiched from the outside by the seal bar 200, the overhanging piece 30 joined to the shape along the shape of the sandwiching surface of the seal bar 200 is formed.
FIG. 3 is a schematic view of a process for forming the projecting piece 30 by superimposing two films. After the innermost layer 110a (not shown) and the innermost layer 110b of the two films 100a and 100b face each other, as shown in FIG. 3A, the edges 120a and 120b are sandwiched from the outside, and the innermost layer 110a and The bonding surface of 110b is heat-sealed. For example, when the seal bar 200 is used as shown in FIG. 3 (A ′), a protruding piece joined in a shape along the shape of the sandwiching surface of the seal bar 200 is formed.
In the present invention, the overhanging piece 30 has a width of preferably about 2 to 20 mm, more preferably about 3 to 10 mm, over the entire circumference, at least on a pair of surfaces facing the body part in the substantially horizontal direction of the body part 10. It is formed outside the gusset bag 1.

  As a manufacturing method of the gusset bag 1 in which the projecting piece 30 is formed in a substantially horizontal direction, for example, the innermost layer is folded along the longitudinal direction of a substantially rectangular laminated film, and the edge of the folded portion Is laminated with the seal bar 200 from the outer layer, the inner layer is heat-sealed, and a laminated film in which a protruding piece 30 protruding outward like a flange is formed, or an edge along the longitudinal direction of two rectangular laminated films It is possible to form a laminated film in which the overhanging pieces 30 are formed by overlapping the innermost layers facing each other and sandwiching the overlapped edge portions from the outer layer with the seal bar 200 and heat-sealing them. The laminated film in which the overhanging piece 30 is formed is joined to the ends in the longitudinal direction to form a body-wound film, in which the portions corresponding to the pair of side folds in the body-wound film are folded inward and flattened. The gusset bag 1 is formed by sandwiching the upper end or the lower end from the outer layer and heat-sealing them. Note that the body-wound film forming the gusset bag 1 can also be formed from a plurality of laminated films. For example, it is folded and bent so that the innermost layer faces in the middle region of one laminated film. The laminated film formed with the overhanging piece 30 in which the edge of the portion is sandwiched from the outer layer by the seal bar 200 and heat-sealed, and the end of the laminated film where the overhanging piece 30 is not formed (generally orthogonal to the overhanging piece 30) When the body-wound film is formed by joining and combining the end portions), the overhanging piece 30 can be formed on a pair of opposing surfaces of the body portion.

  FIG. 4 is a schematic view showing another embodiment of the gusset bag 1 of the present invention. The gusset bag 1 according to the second embodiment of the present invention shown in FIG. 4 is similar to FIG. 1 in that the front portion 11, the back portion 12 (not shown), and the front portion 11 and the back portion 12 are interposed. The body 10 including a pair of side surface folding portions 13 that are preferably foldable with the folding center line 14 as a base point is provided on the inner side, and the upper end take-out port 21 can be opened to take out the contents in a self-standing state. An overhanging piece 30 extending in a substantially horizontal direction is formed in an intermediate region in the height direction of the pair of side surface folding portions 13 of the body portion 10. Thereby, the rigidity of the side folding part 13 increases and the trunk | drum 10 becomes difficult to be crushed. Moreover, since the shape of the side fold portion 13 is flat, the appearance of the gusset bag 1 is also improved.

  FIG. 5 is a schematic view showing another aspect of the gusset bag 1 of the present invention. The gusset bag 1 according to the third embodiment of the present invention shown in FIG. 5 includes a front part 11, a back part 12 (not shown), a front part 11 and a back part 12 as in FIGS. A body portion 10 including a pair of side surface folding portions 13 that are preferably foldable with the folding center line 14 as a base point is provided in between, and the upper end take-out port 21 is opened in a self-standing state to hold the contents. A gusset bag that can be taken out, and an overhanging piece 30 extending in a substantially horizontal direction is formed in an intermediate region in the height direction of the front portion 11 and the back portion 12 of the trunk portion 10. Thereby, the rigidity of the front part 11 and the back part 12 of the trunk | drum 10 increases, and the trunk | drum 10 becomes difficult to be crushed.

  When the overhanging piece 30 extending in a substantially horizontal direction is provided on at least a pair of opposed surfaces of the body portion 10 of the gusset bag 1 of the present invention, the rigidity of the gusset bag 1 is increased and the shape retention is improved as described above. In addition to improving storage at home, the gusset bag 1 can be formed in a rectangular parallelepiped shape, so that the appearance of the gusset bag 1 is also improved, and logistics and display can be performed in a more compact manner.

The gusset bag 1 of the present invention is made of a laminated film. As the laminated film, a multilayer sheet including an aluminum foil layer and / or a paper layer is used. Preferably, the outermost layer is polyester, the intermediate layer is an aluminum foil layer and / or paper layer, and the innermost layer is a polyethylene layer. It is possible to use a multilayer sheet of three or more layers. For example, the first layer which is the outermost layer is polyester, the second layer is polyethylene, the third layer is aluminum foil or paper, the fourth layer is polyethylene, and the innermost layer is A multilayer sheet having a five-layer structure in which a fifth layer is a sealant layer, or a first layer which is an outermost layer is polyethylene terephthalate, a second layer is polyethylene, a third layer is paper, a fourth layer is polyethylene, and a fifth layer is An aluminum foil and a multilayer sheet having a six-layer structure in which the sixth layer is a sealant layer can be used. The thickness of the aluminum foil layer in the multilayer sheet is preferably 5 to 50 μm, and more preferably 5 to 20 μm. The paper layer preferably has a basis weight of 200 g / m ² or less, more preferably 100 g / m ² or less. The basis weight of the paper layer is preferably 15 g / m ² or more. By using a multilayer sheet including an aluminum foil layer and / or a paper layer as the sheet material 22, it is possible to facilitate the folding operation when resealing (reseal), and further, the bag is less likely to be wrinkled. Thus, the appearance of the gusset bag 10 can be maintained well. In particular, since the aluminum foil layer is highly moisture-proof, it is excellent in the storage and quality maintenance of the contents.

  Moreover, it is preferable that the gusset bag 1 of the present invention uses different materials for the laminated film on the opening 20 side of the gusset bag 1 divided by the overhanging piece 30 and on the bottom side of the body portion 10. For example, using the above-mentioned laminated film having an aluminum foil layer or paper layer having plastic deformation property on the opening 20 side as an intermediate layer, the ease of taking out the contained material and the repeated opening / closing of the upper end take-out port 21 are improved, and A single layer or laminated film made of only a synthetic resin such as low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), or unstretched polypropylene film (CPP) on the bottom side of the portion 10 By using it, the strength of the gusset bag 1, particularly the drop strength, is enhanced, the water resistance is improved and the storage stability is improved, and the opening resealability of the gusset bag 1 and the water resistance and strength are improved at low cost. It is preferable because it is compatible.

  As a laminated film made only of a synthetic resin used on the bottom side of the body portion 10, for example, as an outermost layer, polyethylene terephthalate (PET), nylon (Ny), cellophane (PT), moisture-proof cellophane (MST), stretched polypropylene (OPP) Etc., and the innermost layer can be LDPE, LLDPE, medium density polyethylene (MDPE), HDPE, CPP, ethylene vinyl acetate (EVA), ionomer resin, etc. PET, Ny, polypropylene (PP, OPP, CPP), polyethylene (PE, LDPE, LLDPE, MDPE, HDPE), polystyrene (PS), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), ethylene vinyl alcohol Combined (EVOH), polyvinyl Call copolymer (PVA), polycarbonate (PC), EVA, an ionomer resin, PT, 1 or 2 or more resins selected from the MST or the like. For example, a multilayer sheet having a three-layer structure in which the outermost layer is a polyester layer, the intermediate layer is a nylon layer, and the innermost layer is made of LLDPE.

  The gusset bag of the present invention is suitably used as a gusset bag for containing various powders such as food, detergent, hair care products, cosmetics or toiletries, granules or liquids or mixtures thereof, highly viscous fluids or solids. .

It is a mimetic diagram showing one mode of a gusset bag of the present invention. It is process schematic which bends one film and forms an overhang | projection piece. It is the process schematic which overlaps two films and forms an overhang piece. It is a schematic diagram which shows another one aspect | mode of the gusset bag of this invention. It is a schematic diagram which shows another one aspect | mode of the gusset bag of this invention.

Explanation of symbols

1: Gusset bag 10: Body part 11: Front part 12: Rear part 13: Side fold part 14: Folding center line 20: Opening part 21: Upper end outlet 30: Overhang piece 100, 100a, 100b: Film 110, 110a, 110b: innermost layer 120, 120a, 120b: edge 200: seal bar

Claims (3)

  It is made of a laminated film, and includes a body portion including a front surface portion, a back surface portion, and a pair of side surface fold portions formed so as to be foldable inwardly between the front surface portion and the back surface portion. A gusset bag that opens an upper end outlet and enables removal of the contents, and has a protruding piece extending in a substantially horizontal direction on at least a pair of surfaces facing the barrel in the middle region of the barrel. A gusset bag.   The gusset bag according to claim 1, wherein the overhang piece is provided on the entire circumference of the trunk portion.   The gusset bag according to claim 2, wherein a material of the laminated film is different between an opening side and a bottom side of the gusset bag divided by the overhanging piece.

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