JP2008133002A - Gusset bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gusset bag with a simple constitution having a large opening part which is capable of preventing a stored content from being moistened or wetted even when the gusset bag is placed on a moistened table or a wet shelf or the like, excellent in transport, display and storage at home, high in shape keeping property, and free from any joint in a bottom. <P>SOLUTION: The gusset bag has a pair of front and rear frontal parts, and a pair of right and left side fold-in parts to be folded inside the frontal parts, and a content can be taken out by opening an upper end take-out port in a self-standing condition. The gusset bag is composed of an opening side member and a bottom part side member, the opening side member and the bottom part side member are joined with each other in a middle area between the frontal parts and the side fold-in parts, and no joint is formed in the bottom side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a gusset bag for storing powders, granules or liquids, such as foods, detergents, cosmetics or toiletries, and more particularly to a gusset bag having no seam on the bottom surface which is excellent in storability in a wet place.

  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.
For example, Patent Document 1 is flat in a folded state, has an opening at the top of the trunk, has a chuck at the opening, and allows the bag to be self-supporting when it becomes a three-dimensional shape by inserting the contents. A packaging bag is proposed in which a gusset is formed only at the bottom.
Further, in Patent Document 2, a vertically long linear member insertion bag is formed along each vertical side where the front portion and the side folded portion of the gusset bag are connected to each other. A gusset bag is proposed which is inserted and arranged from the take-out port portion to the trunk portion of these linear member insertion bags.
However, these proposals all improve the opening / closing performance of the take-out port portion for efficiently and repeatedly taking out the contents, and since there is a seam on the bottom surface, the sheets forming the seam are not sufficiently fused together. In some cases, or when placed on a damp base or a wet shelf, there is a problem that moisture enters the seam and the contents are wetted or wetted. Furthermore, when the sheet material is a laminated film including a permeable film layer such as paper, there is a problem that water penetrates from the end face of the seam and peels off from the permeable film when the fusion is insufficient.
Packaging bags having no seam on the bottom surface are disclosed in, for example, Patent Document 3 and Patent Document 4, but the packaging bag proposed in Patent Document 3 breaks and deletes the band-shaped opening planned portion provided on the top surface of the bag. The bag proposed in Patent Document 4 is a plastic bag provided with a zippered sachet to open and close the opening with a zipper and has a complicated structure and an opening. The part could not be enlarged.

JP 2003-175945 A JP 2005-104559 A JP 2000-335637 A JP 2002-234552 A

  The present invention has a simple configuration with a large opening, so that the contents do not get wet or wet even when placed on a wet table or a wet shelf, and a laminated film including a permeable film is adopted. It is an object of the present invention to provide a gusseted bag that is excellent in transportation, display, and storage at home, and has no shape separation, and has no seam on the bottom without causing delamination.

  The present invention includes a pair of front and rear front portions and a pair of left and right side folding portions that can be folded inside the front portions, and allows the contents to be taken out by opening the upper end outlet in a self-standing state. It is a gusset bag, and the gusset bag is composed of an opening side member and a bottom side member, and the opening side member and the bottom side member are joined to each other at an intermediate region between the front portion and the side folding portion. A seamless gusset bag is provided.

  According to the present invention, it has a simple structure and a large opening, and even if it is placed on a wet table or wet shelf, the contents are not wetted or wetted, and excellent in transportation, display and storage at home, and A seamless gusset bag can be provided on the bottom surface having high shape retention.

Embodiments of the gusset bag of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing an embodiment of the gusset bag of the present invention.
The gusset bag 1 of the present invention shown in FIG. 1 includes a pair of front and rear front portions 10 and a pair of left and right side folding portions 20 that can be folded inside the front portions 10, and has an opening 32 in a self-standing state. The gusset bag 1 is formed by opening an upper end take-out port 33 of the gusset bag 1, and the gusset bag 1 includes an opening-side member 30 and a bottom-side member 40, and the opening-side member 30, the bottom-side member 40, Is joined in the middle region between the front portion 10 and the side folding portion 20, and there is no seam on the bottom surface.
In FIG. 1, an end portion 31 of the opening side member and an end portion 41 (not shown) of the bottom side member joined in the middle region of the side folding portion 20 are disposed as desired and extend in a substantially horizontal direction. The first overhanging piece 50 is formed.
And the end part 31 of the opening side member joined in the middle part of the front part 10 and the end part 41 (not shown) of the bottom part side member are arranged as desired, and extend in a substantially horizontal direction. The overhanging piece 60 is formed. The first overhanging piece 50 and the second overhanging piece 60 are disposed so as to have different heights. Here, the first overhanging piece 50 is disposed at a position higher than the second overhanging piece 60.
Further, the folding center line 21 a of the opening side member 30 in the side folding portion 20 extends in a substantially vertical direction and reaches the upper end outlet 33. On the other hand, the folding center line 21b in the bottom side member 40 extends in a substantially horizontal direction, and the aspect of folding into the inside of the front portion 10 is different.

FIG. 2 is a schematic perspective view of the gusset bag 1 according to one embodiment of the present invention in which the opening-side member 30 is folded. The end portion 31 of the opening side member and the end portion 41 (not shown) of the bottom side member joined in the middle region of the side folding portion 20 form a first projecting piece 50 extending in a substantially horizontal direction. Therefore, the first overhanging piece 50 supports the three-dimensional shape (a rectangular parallelepiped shape, a cubic shape, etc.) of the gusset bag 1 and is self-supporting even in a state in which the opening-side member 30 is folded. Similarly, the second overhanging piece 60 extending substantially in the horizontal direction is also useful for improving the self-supporting property and the shape retaining property.
1 and 2, the opening side member 30 and the bottom side member 40 of the gusset bag 1 are each provided with a third projecting piece 70 formed by bending one sheet, which is arranged as desired. ing. Therefore, the third overhanging piece 70 should not be a seam. Providing the third overhanging piece 70 is preferable because the self-supporting property and the shape retaining property of the gusset bag 1 are further enhanced.

  FIG. 3 is a schematic side view showing a state in which the opening 32 of the gusset bag 1 which is one embodiment of the present invention is opened. As shown in FIG. 3, the gusset bag 1 of the present invention has a large opening 32, which is convenient for storing and taking out stored items. Furthermore, by folding the opening-side member 30, it can be sealed so that the contents do not escape, and it has good shape retention during transportation and display and is easy to stack, and is easy to store after opening at home. . In particular, as apparent from FIGS. 1 to 3, since the bottom surface of the gusset bag 1 has no seam, the contents do not get wet or wet even when placed on a wet table or a wet shelf. Also excellent storage.

FIG. 4 is a schematic side view of the gusset bag 1 according to one embodiment of the present invention folded in a plane. The gusset bag 1 of the present invention shown in FIG. 4 folds the bottom side member 40 of the side fold portion 20 in the horizontal direction and folds the opening side member 30 of the side fold portion 20 in the vertical direction inside the front portion 10 ( In other words, the folding center line 21b is folded inward), and the opening-side member 30 is folded in the horizontal direction to obtain a flat shape. Thereby, the gusset bag 1 fits compactly, and the storability before storing the contents is also improved. When it is flat, the second projecting pieces 60 on the pair of front and rear front portions 10 may be pulled outward in the horizontal direction, which is the opposite direction, as necessary.
As is clear from FIG. 4, in order to fold the gusset bag 1 into a flat shape, it is preferable that the heights of the first overhanging piece 50 and the second overhanging piece 60 are different.

FIG. 5 is a schematic diagram showing an example of a development view of the gusset bag 1 of the present invention. FIG. 5 is a development view seen from the outside of the opening side member 30 and a development view seen from the bottom outer side (that is, the bottom side of the bottom side member 40).
In FIG. 5, “mountain fold” means folding outside the developed view (that is, outside the gusset bag 1), and “valley folding” means inside the developed view (that is, the back side of the paper) Folding inside the gusset bag 1).
FIG. 6 is a schematic process diagram for joining the opening side member 30 and the bottom side member 40 of the gusset bag 1 of the present invention. As shown in FIG. 5, a and a ′ of the opening side member 30 are joined, and the opening side member 30 is folded according to the directions of the mountain fold and the valley fold, and has a shape as shown in FIG. 6. Further, in FIG. 5, the left and right portions of the bottom side member 40 are folded according to the directions of the mountain fold and the valley fold, and the folded bottom side member 40 has a shape as shown in FIG. Thereafter, in the arrangement shown in FIG. 6, b of the opening side member 30 and b ′ of the folded bottom side member 40 are joined, and c of the opening side member 30 and c ′ of the folded bottom side member 40 are joined. And the gusset bag 1 is completed.
In the developed view shown in FIG. 5, the seal portion is present in addition to a, a ′, b, b ′, c and c ′ to be joined. The third projecting piece is formed by bending one sheet. This is because 70 is provided. The folding line shown in FIGS. 5 and 6 refers to a line that is valley-folded as necessary.

In the present invention, the first overhanging piece 50 and the second overhanging piece 60 are overhanging pieces in which at least a base portion having a predetermined width is joined at an edge portion where two sheets are overlapped, and the third overhanging piece 70 is used. Means an overhanging piece obtained by joining ends of bent sheets with a predetermined width.
In the present invention, the overhanging pieces 50, 60 and 70 are formed outside the gusset bag 1 with a width of preferably about 2 to 20 mm, more preferably about 3 to 10 mm.

The gusset bag 1 of the present invention may be composed of a single layer sheet of paper and / or synthetic resin, but is preferably composed of a laminated sheet. As the laminated sheet, 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 containing an aluminum foil layer and / or a paper layer as the laminated sheet material, the folding operation at the time of resealing (resealing) can be facilitated, and wrinkles and the like are less likely to occur on the bag. Thus, the appearance of the gusset bag 1 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 material of the opening side member 30 and the bottom part side member 40 differs in the gusset bag 1 of this invention. For example, the opening-side member 30 is made of the above-described laminated sheet having a plastically deformable aluminum foil layer or paper layer as an intermediate layer, thereby improving the ease of taking out the contents and the repeated opening and closing of the upper end take-out port 33, and the bottom portion. A single layer or a laminated sheet 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) is used for the side member 40. As a result, the strength of the gusset bag 1, in particular the drop strength, is improved, 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 can be improved at low cost. Therefore, it is preferable. In particular, it is preferable to improve the water resistance of the bottom side member 40 because the contents in the gusset bag 1 placed on a wet table or a wet shelf are stored for a long time without getting wet or wet.

  As a laminated sheet consisting only of a synthetic resin suitably used for the bottom side member 40, for example, as an outermost layer, polyethylene terephthalate (PET), nylon (Ny), cellophane (PT), moisture-proof cellophane (MST), stretched polypropylene (OPP) 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 Polymer (EVOH), Polyvinyl Alcohol 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 a variety of foods (sugar, flour, salt, seasonings, pet food, etc.), detergents, hair care products, cosmetics, toiletries or industrial products (cement, sand, compost, horticultural soil, etc.) It is suitably used as a gusset bag for containing powder, granules or liquid, or a mixture thereof, a highly viscous fluid or solid.

It is a perspective schematic diagram which shows one embodiment of the gusset bag of this invention. It is a perspective schematic diagram of the state which folded the opening side member of the gusset bag of this invention. It is a side surface schematic diagram of the state which opened the opening part of the gusset bag of this invention. It is a side surface schematic diagram of the state which folded the gusset bag of this invention in planar shape. It is a schematic diagram which shows an example of the expanded view of the gusset bag of this invention. It is a process schematic diagram which joins the opening side member and bottom part side member of the gusset bag of this invention.

Explanation of symbols

1: Gusset bag 10: Front part 20: Side folding part 21a: Folding center line 21b: Folding center line 30: Opening side member 31: End part of opening side member 32: Opening part 33: Upper end outlet 40: Bottom side member 41: End of bottom side member 50: First overhanging piece 60: Second overhanging piece 70: Third overhanging piece

Claims (6)

  A gusset bag that includes a pair of front and rear front portions and a pair of left and right side folds that can be folded inside the front portions, and that allows the contents to be taken out by opening the upper end outlet in a self-standing state. The gusset bag is composed of an opening-side member and a bottom-side member, and the opening-side member and the bottom-side member are joined to each other in the middle region of the front portion and the side folding portion. bag.   The end portion of the opening side member and the end portion of the bottom side member joined in an intermediate region of the side folding portion form a first projecting piece extending in a substantially horizontal direction. Gusset bag as described.   The end part of the said opening side member joined in the middle area of the said front part and the end part of the said bottom part side member form the 2nd overhang | projection piece extended in a substantially horizontal direction. Gusset bag as described in.   The gusset bag according to claim 3, wherein the first overhanging piece and the second overhanging piece have different heights.   The bottom side member of the side fold portion is folded inward in the horizontal direction, the opening side member of the side fold portion is folded inward of the front portion, and the opening side member is folded in the horizontal direction to be flat. The gusset bag in any one of Claims 1-4.   The gusset bag according to any one of claims 1 to 5, wherein materials of the opening side member and the bottom side member are different.

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