JP2001199452A - Gusset bag and gusset bag with spout - Google Patents

Abstract

(57) [Problem] To provide a gusset bag and a gusset bag with a spout that have a significantly improved self-standing stability by easily forming a flat portion at the bottom when contents are stored. SOLUTION: Two folding plates having a substantially V-shaped cross section are inserted between an upper surface plate and a rear surface plate, and a peripheral edge is thermally bonded by a top thermal bonding portion, a bottom thermal bonding portion, and a ridge line thermal bonding portion. A gusset bag having a bottom forming thermal bonding portion formed by thermally bonding inner surfaces from the bottom thermal bonding portion obliquely upward to the ridgeline thermal bonding portion, wherein the bottom portion of the top plate and the folding plate is provided. A top plate side triangular area formed by a heat bonding portion, the ridge line heat bonding portion, and the bottom forming heat bonding portion, or the bottom plate heat bonding portion and the ridge line heat bonding portion of the back plate and the folding plate. A gusset bag, wherein a folding means is provided in at least one side of the back plate side triangular region formed by the bottom portion forming thermal bonding portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gusset bag excellent in self-standing stability when a liquid, viscous body, powder, granules, or other contents are stored and self-standing. The present invention relates to a gusset bag with a spout that has excellent self-standing stability and is fitted with a gusset bag.

[0002]

2. Description of the Related Art Conventionally, a self-supporting packaging bag capable of storing contents and being self-supporting is a standing pouch, a square bottom bag, or a gusset type packaging bag which becomes a square bottom when contents are stored. Is generally well known. All of these self-supporting packaging bags are configured so that a flat part is formed at the bottom of the packaging bag, so they can be placed upright. As the number of displays per unit space increases, the appeal to customers also increases, and when used, the contents can be taken out by opening the opening in the upright position. Since it can be used as it is, it is excellent in convenience, so it is applied to various products. However, in the case of a gusset-type packaging bag in which a flat portion is formed at the bottom of the packaging bag when the content is stored, the type and amount (capacity and weight) of the content, or the gusset-type packaging Depending on the material composition of the bag, there was also a type that was difficult to stand on its own.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to make it easy to form a flat portion at the bottom when contents are stored, so that the self-sustainability can be improved. It is an object of the present invention to provide a gusset bag with significantly improved performance, and a gusset bag with a spout tool with excellent self-standing stability, in which a spout tool is attached to the gusset bag.

[0004]

Means for Solving the Problems In order to achieve the above object, the present invention is directed to an invention as set forth in claim 1, in which two folds having a substantially V-shaped cross section are provided between an upper plate and a back plate. The plate is inserted so that the folded portions of the two folding plates face each other,
The inner surfaces of the four ridges formed by the top plate, the back plate, and the folding plate are thermally bonded to each other to form a tubular body having a ridge thermal bonding portion, and the upper end and the lower end of the tubular body are thermally bonded, respectively. Forming a top thermal bonding portion and a bottom thermal bonding portion, and thermally bonding the inner surfaces from the bottom thermal bonding portion to the ridge line thermal bonding portion obliquely upward from the bottom thermal bonding portion. In the gusset bag having a portion, a top plate side triangular region formed by the bottom thermal bonding portion, the ridge line thermal bonding portion, and the bottom forming thermal bonding portion of the top plate and the folding plate, or the back plate A folding means is provided in the triangular region on at least one side of the back plate side triangular region formed by the bottom thermal bonding portion, the ridge line thermal bonding portion, and the bottom forming thermal bonding portion of the folding plate. Characteristic It is intended to.

According to a second aspect of the present invention, in the gusset bag according to the first aspect, the folding means is at least one perforation.

According to the first or second aspect of the present invention, the elasticity (repulsion) of the gusset bag composed of the upper plate, the back plate, and the folding plate can be reduced, and the bottom of the gusset bag can be reduced. Can be easily bent to the side where the bending means is provided by the bending means, so that a flat portion can be easily formed at the bottom, and a gusset bag excellent in self-standing stability can be obtained.

According to a third aspect of the present invention, in the gusset bag according to any one of the first and second aspects, the bending means is a perforated line having two or three lines, and the interval between the lines is 0. It is characterized in that it is 7 to 3.0 mm. With this configuration, the elasticity (repulsion) of the gusset bag composed of the top plate, the back plate, and the folding plate can be further reduced, and the bottom of the gusset bag can be more easily bent by the bending means. Therefore, the flat portion can be more easily formed on the bottom portion.

According to a fourth aspect of the present invention, there is provided the gusset bag according to any one of the first to third aspects, wherein the ridge line thermal bonding portion on the upper surface plate side formed by the upper surface plate and the folding plate. Or, the shape of the ridge line thermal bonding portion on at least one side of the ridge line thermal bonding portion on the back plate side formed by the back plate and the folding plate is kept near the intersection of the bottom forming thermal bonding portion of the ridge line thermal bonding portion. Means are provided.

According to a fifth aspect of the present invention, in the gusset bag according to the fourth aspect, the shape retaining means is a notch.

[0010] By adopting the structure described in any one of the fourth and fifth aspects, the flat portion can be more easily formed on the bottom.

According to a sixth aspect of the present invention, in the gusset bag according to any one of the first to fifth aspects, a pouring device is fixed to the top heat bonding portion by thermal bonding. Is what you do. With this configuration, it is possible to obtain a gusset bag with a spout having excellent self-stability, and particularly a gusset bag with a spout suitable for contents such as a liquid or a viscous body.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings and the like. FIG. 1 is a plan view of an embodiment of a gusset bag with a spout according to the present invention as viewed from a top plate side. FIG. 2 is a plan view of a first embodiment as viewed from a back plate side of FIG. 3 is a perspective view from the bottom of the gusset bag with the spouting tool shown in FIG. 1 in which the contents are filled and self-standing, and FIG. 4 is a plan view showing the second embodiment seen from the back plate side in FIG. In the figure, 1, 1 'is a gusset bag with a spout, 2 and 2' are ridge line heat bonding parts, 3 is a top part heat bonding part, 4 is a bottom heat bonding part, and 5, 5 'are bottom parts. Reference numeral 6 denotes a heat-sealing part, 6 denotes a shape retaining means, 7 and 7 'denote bending means, 8 denotes a pouring tool, 10 denotes a top plate, 20 denotes a rear plate, 30 denotes a folding plate, and 31 denotes a bent portion.

FIG. 1 is a plan view of one embodiment of a gusset bag with a spout according to the present invention, as viewed from the top plate side. FIG. 2 is a plan view of the first embodiment as viewed from the back plate side of FIG. In the figure, a gusset bag 1 with a spouting tool comprises two folding plates 30, 30 each having a substantially V-shaped cross section between an upper surface plate 10 and a rear plate 20, and folding portions 31, of the two folding plates 30, 30, The upper plate 10, the rear plate 20, and the folding plate
The inner surfaces of the four ridges formed by 30 and 30 are thermally bonded to each other to form a tubular body having ridge thermal bonding portions 2, 2, 2 'and 2', and the upper and lower ends of the tubular body are thermally bonded. To form the top thermal bonding portion 3 and the bottom thermal bonding portion 4, and the ridge line thermal bonding portions 2, 2, obliquely upward from the bottom thermal bonding portion 4.
The bottom surface forming thermal bonding portions 5, 5, 5 ', 5' are formed by thermally bonding the inner surfaces 2 ', 2' to each other in a triangular shape, and the upper surface plate
A shape retaining means 6 comprising a cut near the intersection of the ridge line thermal bonding portion 2, 2 on the 10 side with the bottom forming thermal bonding portion 5, 5;
6 and the ridge line thermal bonding portion on the back plate 20 side
2 ′, 2 ′, the bottom thermal bonding portion 4 of the folding plates 30, 30 and the bottom plate forming thermal bonding portions 5 ′, 5 ′ formed in the triangular region on the back plate 20 side, the folding plates 30, 30 Said folding part 31,
Bending means 7 consisting of one perforation orthogonal to 31;
7, and a pouring tool 8 is fixed to the top thermal bonding portion 3 by thermal bonding. Although not shown, the corners of the gusset bag 1 with the spouting tool are cut through the cutouts provided in the two folding plates 30, 30 to form the upper surface plate.
10 and the back plate 20 are fixed by thermal bonding to form four corners.

FIG. 3 is a perspective view of the gusseted bag with the spouting tool shown in FIG. 1 when the gusseted bag with the spouting tool is self-supported and the contents are filled, and the gusseted bag with the spouting tool 1 shown in FIG. The folding means 7, 7 composed of one perforation are bent to the side provided with the folding means 7, 7 composed of the one perforation, and the shape retaining means 6, 6 composed of the cut shown in FIG. Since the flat part is formed at the bottom part, it can be easily self-supported.

In FIGS. 1 to 3, the bending means 7, 7 are shown by a single perforation, but this is merely an example, and the present invention is not limited to this.
For example, it may be a straight cut,
It is not limited to one and may be formed in a plurality of shapes such as two or the like, or may be a rectangular or slot-shaped notch,
Furthermore, it may be a rectangular or long hole-shaped unheated adhesive portion, and in short, it can kill the elasticity (repulsive force) of the gusset bag 1 with the spouting tool composed of the top plate, the back plate, and the folding plate. The folding means 7, 7 are all included in the present invention, and one embodiment thereof is illustrated in FIG.

FIG. 4 is a plan view showing the second embodiment as viewed from the back plate side of FIG. 1, and shows a gusset bag 1 'with a spout.
In the first embodiment shown in FIG. 2, the bending means 7, 7 composed of one perforation are provided, but instead of this, the bending means 7, The present embodiment is the same as the first embodiment except that bending means 7 'and 7' are provided. With this configuration, the elasticity (repulsion) of the gusset bag composed of the top plate, the back plate, and the folding plate can be further reduced as compared to the first embodiment, and the bottom of the gusset bag is bent. The means 7 ', 7' can be even more easily folded. By the way, the reason why the interval between the stripes is set to 0.7 to 3.0 mm is such that if the interval between the stripes is narrower than 0.7 mm, the processing is hindered, and if the interval is longer than 3.0 mm, each perforation exists alone. This is because the ease of bending is not different from the case of one article, and the synergistic effect that each article is related to each other and easy to bend is not exhibited. Also, the reason why the number of lines is two or three is that even if the number of lines is further increased, there is no difference in easiness of bending and the appearance is not preferable.

The shape-retaining means 6, 6 is not limited to the cut, and may be, for example, a rectangular or elongated notch, or a rectangular or elongated hole-shaped unheated adhesive portion. In other words, the shape-retaining means 6, 6 that can kill the elasticity (repulsive force) of the gusset bag 1 with a spout, which is composed of a top plate, a back plate, and a folding plate, are all included in the present invention. is there.

In FIG. 1 to FIG. 4, the folding means 7, 7 and 7 ', 7' are connected to the ridge line heat bonding portions 2 ', 2' on the back plate 20 side and the folding plate 30. , 30 are provided in the triangular region on the back plate 20 side formed by the bottom thermal bonding portion 4 and the bottom forming thermal bonding portion 5 ′, 5 ′. Ridge heat bonding part 2, 2
And the upper surface plate formed by the bottom thermal bonding portions 4 and the bottom forming thermal bonding portions 5 and 5 of the folding plates 30 and 30
It is also possible to provide a configuration provided on both sides by providing it on the 10-side triangular area, and the same applies to the shape retaining means 6, 6. Although the one provided near the intersection with the bottom-forming thermal bonding portions 5 and 5 has been exemplified, the present invention is not limited to this, and the bottom forming of the ridge thermal bonding portions 2 ′ and 2 ′ on the back plate 20 side. Thermal bonding part 5 ', 5'
May be provided in the vicinity of the intersection with the above, and may be provided on both sides. In this way, the bending means 7, 7,
In addition, it is more preferable to adopt a configuration in which 7 ', 7' and the shape retaining means 6, 6 are provided in terms of productivity. FIG.
4 to 4, the bottom-forming thermal bonding portions 5, 5, 5 ′,
Although 5 'is triangular, it may be thermally bonded in a belt shape (not shown).

Next, an example of a method for manufacturing a gusset bag with a spout according to the present invention will be described. As for the gusset bag with the spouting tool of the present invention, first, a gusset bag having an opening at an upper end is manufactured using a well-known gusset bag making machine. At this time, a well-known perforation forming device and a notch forming device are installed in the gusset bag making machine, and the gusset bag in which the folding units 7 and 7 and the shape retaining units 6 and 6 are formed is manufactured.
Thereafter, a spout (a spout without a lid) is inserted into the opening of the gusset bag, and the spout is fixed to the opening by thermal bonding, and at the same time, the opening is thermally bonded to the top 3 (see FIG. 1).
The contents are filled from the spout of the pouring device (pouring device without a lid), and the lid is screwed to the pouring device (pouring device without a lid). A gusset bag with a pouring tool filled with an object can be obtained.

The method of heat sealing when manufacturing the gusset bag of the present invention and the gusset bag with a spout of the present invention includes, for example, a bar seal, a rotating roll seal, a belt seal, an impulse seal, a high frequency seal,
It can be performed by a known method such as an ultrasonic seal.

Next, the packaging material used for the top plate 10, the back plate 20, and the two folding plates 30, 30 forming the gusset bag with the spout of the present invention will be described. Top plate 10 and back plate forming the gusset bag 1 with the spout
20, As the packaging material used for the two folding plates 30, 30,
In any case, as long as the inner layer is made of a heat-adhesive resin layer and the inner layers can be heat-bonded to each other by heat and pressure, they can be used without any particular limitation. A gusset bag with a spout may be formed, or a gusset bag with a spout formed of a laminate having a different configuration.

The resin forming the heat-adhesive resin layer as the inner layer of the packaging material is, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, ethylene-acetic acid. From one or more resins such as vinyl copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer, ethylene-methacrylic acid copolymer, polypropylene, ethylene-propylene copolymer, etc. Resin or a sheet obtained by forming these into a film can be used.
μm is appropriate.

As the outer layer of the wrapping material, a synthetic resin film having excellent properties in mechanical, physical, chemical and the like is used because it is a basic material constituting the gusset bag 1 with the spout. For example, a film made of a resin such as polyester, polyamide, polypropylene, polycarbonate, and polyacetal can be used. As these films, an unstretched film or a uniaxial or biaxial direction can be used. Any film such as a stretched film can be used.The thickness of the film may be any thickness as long as it can be held to the minimum necessary for strength, rigidity, and the like as a basic substrate, and costs and the like can be reduced. Although it may be determined in consideration of the above, usually about 12 to 25 μm is appropriate. In addition, these films may be used as a film coated with polyvinylidene chloride as needed, or as a film on which a vapor-deposited layer of an inorganic substance such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, and zirconium oxide is formed. A configuration having a property may be adopted. Further, since the synthetic resin film used as the outer layer is generally printed on the inner layer side of the synthetic resin film in many cases, the synthetic resin film used as the outer layer has printability. Stretched films that are required and are stretched uniaxially or biaxially are preferred. Also, if necessary, synthetic paper,
Cellophane, paper, or non-woven fabric can also be used as appropriate.

Further, in the present invention, an intermediate layer may be provided between the inner layer and the outer layer, and the intermediate layer usually cannot sufficiently function as a gusset bag only with the inner layer and the outer layer. It is provided in cases and the like. The functions include gas barrier properties, mechanical toughness, bending resistance, piercing resistance, impact resistance, abrasion resistance, cold resistance, heat resistance, chemical resistance, etc., and are required as gusset bags. These final functions are achieved by providing the intermediate layer. Examples of the substrate used as the intermediate layer include, for example, metal foils such as aluminum, iron, copper, and tin, or polyolefins such as polyethylene terephthalate, polyamide, polyethylene, and polypropylene; polyvinyl chloride; polycarbonate; polyvinyl alcohol; Films of propylene copolymer, saponified ethylene-vinyl acetate copolymer, etc. or films coated with polyvinylidene chloride, or vapor deposition of inorganic substances such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, zirconium oxide. A coated film or a film of polyvinylidene chloride or the like can be used. Further, one or more of these base materials can be used in combination. The thickness of the substrate is not particularly limited as long as the function required for the gusset bag can be satisfied, and can be appropriately selected as needed.

Next, a pouring device used for the gusset bag with a pouring device of the present invention will be described. First, as a method for forming a pouring tool (a pouring tool without a lid), a well-known injection molding method can be used. The material used for the pouring tool (pouring tool without a lid) may be any material that can be melted and fused to each other by heat with the heat-adhesive resin layer used for the inner layer, and is selected according to the resin used for the inner layer. Need to be low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear (linear)
Low-density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer,
Examples include an ethylene-methacrylic acid copolymer and an ethylene-propylene copolymer. Further, the pouring tool (pouring tool without a lid) may be colored with a pigment or the like as necessary.

Further, the lid to be screwed to a screw portion provided on the outer periphery protruding outside the gusset bag of the pouring tool (pouring tool without a lid) can be formed by a well-known injection molding method. . Examples of the material used for this include polyethylene, polypropylene, polystyrene, ethylene-propylene copolymer, acrylonitrile styrene butadiene polymer, and other semi-rigid or rigid synthetic resins.
Of course, the lid may be colored with a pigment or the like as necessary. Further, the lid may have a pill proof function as necessary.

Further, although the description has been made so far with the gusset bag with the pouring tool, the present invention can naturally be applied to an ordinary gusset bag without the pouring tool.

[0028]

According to the present invention, as described so far,
Top plate side triangular region formed by the bottom thermal bonding portion, ridge thermal bonding portion and bottom forming thermal bonding portion of the top plate and the folding plate, or the bottom thermal bonding portion and ridge thermal bonding portion of the back plate and the folding plate A gusset bag having excellent self-standing stability and a gusset bag with a spouting tool are provided by providing a bending means in at least one side of the back plate side triangular region formed by the heat bonding portion and the bottom portion-forming triangular region. This has the effect of being able to do so. Further, the ridge line heat bonding portion on the upper plate side formed by the upper plate and the folding plate, or the ridge line heat bonding portion on at least one side of the ridge line thermal bonding portion on the back plate formed by the back plate and the folding plate. By providing the shape retaining means in the vicinity of the intersection of the bonding portion and the bottom bonding thermal bonding portion, it is possible to provide a gusset bag and a gusset bag with a spouting tool having more excellent self-standing stability. .

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a gusset bag with a spout according to the present invention, as viewed from a top plate side.

FIG. 2 is a plan view showing the first embodiment as viewed from the back plate side of FIG. 1;

FIG. 3 is a perspective view of the gusset bag with the spouting tool shown in FIG.

FIG. 4 is a plan view showing the second embodiment as viewed from the back plate side of FIG. 1;

[Explanation of symbols]

 1, 1 'Gusset bag with dispensing tool 2, 2' Ridge line thermal bonding part 3 Top thermal bonding part 4 Bottom thermal bonding part 5, 5 'Bottom forming thermal bonding part 6 Shape keeping means 7, 7' Bending means 8 Note Tool 10 Top plate 20 Back plate 30 Folding plate 31 Folded part

Claims (6)

[Claims] 1. A fold plate having a substantially V-shaped cross section is inserted between an upper plate and a back plate so that the folded portions of the two fold plates face each other. The inner surfaces of the four ridge lines formed by the folding plate are thermally bonded to each other to form a cylindrical body having a ridge line thermal bonding portion, and the upper end and the lower end of the cylindrical body are thermally bonded to the top thermal bonding portion and A gusset bag having a bottom forming thermal bonding portion formed by thermally bonding inner surfaces from the bottom thermal bonding portion obliquely upward to the ridgeline thermal bonding portion while forming a bottom thermal bonding portion, A top plate side triangular region formed by the bottom plate thermal bonding portion, the ridge line thermal bonding portion, and the bottom forming thermal bonding portion of the top plate and the folding plate, or the bottom heat of the back plate and the folding plate. Bonding part, the ridge line heat bonding part, and the bottom part formation A gusset bag, wherein a folding means is provided in at least one side of the back plate-side triangular region formed by the heat bonding portion. 2. The gusset bag according to claim 1, wherein said folding means is at least one perforation. 3. The gusset according to claim 1, wherein the bending means is a perforation of two or three lines, and a space between the lines is 0.7 to 3.0 mm. bag. 4. The thermal bonding portion on the upper surface side formed by the upper surface plate and the folding plate, or the thermal bonding portion on the rear surface side formed by the back plate and the folding plate. The gusset bag according to any one of claims 1 to 3, wherein a shape-retaining means is provided near an intersection of at least one side of the ridge line thermal bonding portion with the bottom forming thermal bonding portion. . 5. The gusset bag according to claim 4, wherein said shape retaining means is a notch. 6. The gusset bag with a spout according to claim 1, wherein a spout is fixed to the top thermal bonding portion by thermal bonding.