JP4508369B2 - Pouch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pouch as a primary container for a cartridge used in equipment such as a vending machine, a printing machine, or the like that contains concentrated beverages, printing ink, or the like.
[0002]
[Prior art]
Pouches made by a heat seal prescription using a composite film in which plastic films or the like are mainly laminated are used as packaging bags for many products such as foods and household goods.
Various shapes are known as the shape of the pouch, but it is a standing pouch that is self-supporting for filling contents having liquid and jelly-like properties. Side gusset pouches or the like that cause swelling are used, and pouches with spouts in which spout assemblies are attached to these pouches are also used.
For example, the example shown in FIGS. 6A and 6B is a conventional side gusset pouch. Moreover, FIG.6 (c) is an example of a spout, (d) has shown the pouch equipped with the spout.
Thus, a gusset portion may be provided in order to efficiently store the contents in the pouch. By providing a gusset portion, the pouch may exhibit self-supporting properties.
[0003]
[Problems to be solved by the invention]
When storing contents in a pouch, the storage efficiency is as high as possible, and the pouch has a shape that can be easily stored in a tapered receiving portion as a cartridge container of various devices, and a product with good productivity in bag making is required. ing. The device is, for example, an office printing machine. In this case, the cartridge container is filled with ink, and examples of the device include a cup type vending machine such as juice. The cartridge container is filled with concentrated fruit juice or sugar liquid.
However, as a conventional pouch, there is a thing with good storage of contents such as the side gusset pouch, but a pouch having a shape corresponding to the tapered receiving portion of the device is handmade as a deformed pouch. There was a problem in productivity (bag making speed) because production by the system or a special bag making machine was used. In addition, in a pouch equipped with a conventional spout, the inner surfaces of the pouch are in close contact with each other while the contents are being taken out, and the contents located behind the closed part may not be taken out.
The problem of the present invention is that the contents are efficiently stored, the take-out is easy, the pouch is not blocked, and it is easy to set in the receiving part having the taper of various devices. It is to provide a pouch shape.
[0004]
[Means for Solving the Problems]
In the present invention, at least one side of each member is made of a film made of a heat seal layer, and the front member and the rear member are made to face each other made of the heat seal layer, and the folding widths are different from each other from the left and right. The folded side member is inserted between the front member and the rear member, side seal portions are provided at both side ends thereof, and the side member is folded in the middle, and the left and right side members Among them, the side member having the narrowest folding width becomes the lower surface of the pouch, and further, the side gusset pouch provided with the seal portion at the upper and lower portions is provided with a blocking prevention rib extending into the pouch. A pouch equipped with a spout assembly, wherein a diagonal seal portion is provided in at least one corner of the pouch, and an outer portion of the diagonal seal portion is cut off. Than is.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
As described above, the object of the present invention is as follows. Good content storage efficiency,
2. The shape is suitable for tapered receiving devices,
3. Good productivity (bag making speed)
4). It is easy to take out the filled contents, and it can be taken out to the end, and the present inventors have solved the problem by making a pouch as described below as a result of earnest research on the problem. As a result, the present invention has been completed. That is, at least one side of each member is made of a film made of a heat seal layer, the front member and the rear member are made to face each other made of the heat seal layer, and the side members folded in half from the left and right are the front member and the rear surface. In the side gusset pouch that is inserted between the members and provided with side seal portions on both side ends thereof and the upper and lower ends are sealed, changing the folding width of the left and right side members, the side members are Folded in the middle, of the left and right side members, the side member with the smaller folding width becomes the lower surface of the pouch, and further, an oblique seal portion is provided at the corner of the pouch, it is obtained by wherein a shape obtained by cutting off an outer portion of the oblique seal portion, furthermore, also the spout molded separately to the sealing portion of the pouch is attached If, and the easy container is taken out of the contents. An obstruction prevention rib extending inside the pouch is connected to an adhesive base of the spout to the pouch.
[0006]
The pouch of the present invention can be made without using a conventional side gusset pouch bag making method without reducing productivity. Specifically, the heat seal surfaces of the front member and the rear member are supplied facing each other, and the folding width obtained by folding the heat seal surface outside between the front member and the rear member is arbitrary on the left and right. It is obtained by inserting the side members changed to left and right, heat-sealing the left and right end parts, and sealing up and down, the upper and lower seal shape shall be an oblique seal part at the corner of the pouch, after oblique seal portion may have a shape obtained by cutting off an outer portion of the oblique seal portion. The oblique seal portion and the cut-off portion may be linear or curved.
[0007]
Further, in the present invention, a spout extending to the inside of the pouch is attached to the edge of the pouch, but the method is to provide an unsealed portion at the time of the upper and lower seals of the pouch and open the unsealed portion. Then, the adhesive base portion of the spout can be inserted, and the adhesive base surface and the inner surface of the unsealed portion can be heat sealed from the outside of the pouch.
[0008]
【Example】
The pouch of the present invention will be described in more detail with reference to the drawings. Figure 1 is a diagram showing an example of the pouch of the present invention, it is a perspective view of (a) a front view, in a state filled with contents in (b) Pas Uchi. 2A and 2B are diagrams for explaining the structure of the pouch of the present invention, in which FIG. 2A is a conceptual diagram showing each member separately, and FIG. 2B is a front view. FIG. 3 is a view for explaining an oblique seal portion and a cut-off portion of the pouch. FIG. 4 is a perspective view showing an embodiment of the spout attached to the pouch of the present invention, and shows a method of attaching the spout to the (a) spout, (b) spout body, and (c) the pouch. FIG. 5 is a cross-sectional view showing the configuration of the laminate that forms the pouch of the present invention.
[0009]
The pouches of the present invention are side gusset type pouches as shown in FIGS. 1 (a) and 1 (b), but the fold widths w ₁ and w ₂ of the gusset portion to be folded are changed. It is a feature.
In the following description, the name of each member such as the front member, the rear member, and the side member of the pouch is filled with the contents to describe the positional relationship in FIGS. 2 (a) and 2 (b), The names when the side members are placed up and down are also as described above.
[0010]
As schematically shown in FIG. 2 (a), the front member 3 and the rear member 4 are arranged with their heat seal layers facing each other, and the side members 5 and 6 are heat sealed from the left and right. Side members 5 and 6 that are folded into two different widths w1 and w2 on the left and right sides are inserted between the front member 3 and the rear member 4 as shown in FIG. 2B. The periphery is heat-sealed , and side seal portions 7, 8, 9 and a lower seal portion 10 are provided . However, an unsealed 19 is formed as a content filling port. In FIG. 2 (a), 7x, 8x, 9x, and 10x shown at the peripheral edge of each member are heat seal scheduled portions. Further, as shown in FIG. 3, diagonal seals 11, 12, 13, and 14 are formed at the corners of the pouch, and the outer portions of these diagonal seals are cut off so that the cut-off portions 15, 16, 17, and 18 are formed. It may be provided . In this embodiment, the oblique seal portion and the cut-off portion corresponding to the oblique seal portion are examples implemented at all four locations. However, the oblique seal portion and the cut-off portion are provided at any part of the four corner portions. It may be provided.
[0011]
Next, a method for manufacturing a pouch according to the present invention will be described with reference to examples. Using a composite film having at least one surface having heat sealability, as shown in FIG. 2 (a), the front and rear members are arranged so that the heat seal surfaces face each other, and the side members are heated from both sides thereof. Fold it in half so that the seal surface is on the outside, and insert it between the front member and the rear member with the folds h1 and h2 inside, but in the present invention, the folding width of the left and right side members folded in half Make a difference. The right and left insert different folding widths w1, side members 5 and 6 of w2 of and heat sealing the side wall edges to form a side sheet Lumpur unit 7, 8, then the bottom of the lower seal portion 10 is formed in Thus, the primary bag product as shown in FIG. As the primary bag products may be subjected to a top sealing unit 9, leaving the unsealed portion 19 for inserting the spout in the top part at the same time the lower seal portion 10.
[0012]
A secondary bag-made product is obtained by cutting off the outer portion of the diagonally sealed portion, which is provided obliquely at the corners of the obtained primary bag-made product.
[0013]
As another manufacturing method of the present invention, the side seal type, the upper part of the diagonal seal shape in advance, the lower seal type (the top seal type, the diagonal seal type leaving the unsealed part of the filling part), The secondary bag-making product can be made in-line using a bag-making machine equipped with a device for cutting off the outer portion of the oblique seal portion.
[0014]
As shown in FIG. 3, on the primary bag products, in the sealing of the lower seal, subjecting the oblique seal portion 11, 12, 13, 14 in the angle portion of the pouch, Shi overlooked off outside of the oblique seal portion By providing the cut-off portions 15, 16, 17, and 18, the portion that becomes a dead space when the contents are filled can be reduced. The shape of the oblique seal portion may be a straight line or a curved line.
[0015]
In the pouch of the present invention, a tube film obtained by a method such as inflation may be used, and the side gusset member may be folded by pushing plates from the left and right sides of the film.
[0016]
When the spout is attached to the pouch of the present invention, as shown in FIG. 4C, the unsealed portion 19 is opened, the adhesive base 23 of the spout 2 is inserted, and the opening is opened from the outside of the pouch. The pouch of the part 19 is heated and pressed to heat-seal the inner surface of the pouch of the opening 19 and the adhesive base 23 of the spout main body 20. When the spout 2 is attached, the contents can be filled from the cylindrical portion of the spout main body 20.
The shape of the blocking prevention rib 28 provided at the spout attached to the pouch according to the present invention is an ε-shaped cross section in the example shown in FIG. Any shape may be used so long as it exhibits a blocking prevention effect.
[0017]
As a film material constituting the pouch of the present invention, for example, a tube-shaped single layer film manufactured by an inflation film forming method or the like can be used, but a composite film mainly composed of plastic is more preferably used. The composite film is composed of at least a base material layer and a heat seal layer. Usually, as shown in FIG. 6A, the composite film 30 includes a base material layer 31 and a heat seal layer 33. 3 layers (excluding the adhesive layer) provided with an intermediate layer 32 therebetween, or 4 layers such as 2 layers, 3 2 (1), 3 2 (2) as shown in FIG. 6B, or Further, a plurality of layers may be laminated. First, as the base material layer 31 of the composite film constituting each surface member of the pouch according to the present invention, since it becomes a basic material constituting the pouch, the composite having excellent properties in mechanical, physical, chemical, etc. Resins can be used. For example, polyester-based, polyamide-based, polypropylene-based, polycarbonate-based, and polyacetal-based resins can be used. Moreover, as a film using these resins, any of unstretched films or stretched films stretched in a uniaxial or biaxial direction can be used, and the thickness of the film includes strength, rigidity, etc. as a basic material. As long as it has a thickness that can be held to the minimum necessary, heat sealing takes a long time, resulting in lower productivity and higher costs. If the substrate layer is too thin, the strength, rigidity and the like are lowered, which is not preferable.
[0018]
In the present invention, the thickness of the base material layer is suitably about 12 to 30 μm for the reasons described above. The synthetic resin film may be a film coated with polyvinylidene chloride as needed, or a film on which a vapor deposition layer of aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, zirconium oxide or the like is formed. It is good also as a structure which has barrier property. In addition, when the base material layer is printed, it is usually used as an outer surface layer, so that it is often printed on the back side (the surface on which the intermediate layer or the heat seal layer is bonded), so that printability is also required. .
As the base material layer, a stretched film that is rigid and stretched in a uniaxial direction or a biaxial direction is preferably used because of its good workability including the printing.
In addition, the heat seal layer 33 of the composite film constituting each surface member of the pouch of the present invention may be any one that can be heat sealed (sealed) when making a bag of the composite film. Density polyethylene, high density polyethylene, linear low density polyethylene, ethylene α-olefin copolymer polymerized using metallocene catalyst, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene A resin composed of one or more of a resin of acrylic acid copolymer, ethylene-methyl acrylate copolymer, ethylene-methacrylic acid copolymer, or a sheet obtained by forming a sheet thereof can be used. In particular, ethylene-α / olefin copolymers polymerized using the above metallocene catalysts have a narrow molecular weight distribution and stable copolymerization ratio, so they have excellent low-temperature heat sealability and hot sealability. This is a packaging material suitable for preventing a sealing failure caused by the step difference in the film overlap portion of the upper and lower seals.
[0020]
The thickness of the heat seal layer 33 is suitably 30 to 500 μm. When the thickness of the heat seal layer 33 is less than 30 μm, there is a risk of poor sealing performance, and the seal strength is insufficient, and the bag may be broken due to a drop impact or the like. On the other hand, if the thickness of the heat seal layer 33 exceeds 500 μm, it takes time to heat seal and the workability is lowered.
[0021]
An intermediate layer may be provided between the base material layer and the heat seal layer of the composite film used in the pouch of the present invention, and the intermediate layer is usually packaged in a two-layer configuration of the base material layer and the heat seal layer. It is provided when the function as a bag cannot be sufficiently achieved. Further, the intermediate layer may have two or more layers as described above.
The functions of the intermediate layer 32 include gas barrier properties (gas barrier properties), mechanical toughness, rigidity, bending resistance, puncture resistance, impact resistance, wear resistance, cold resistance, chemical resistance, and the like. In many cases, these functions required as a packaging bag are achieved by providing the intermediate layer 32. Examples of the material used for the intermediate layer 32 include metal foils such as aluminum, iron, copper, and tin, polyolefins such as polyethylene terephthalate, polyamide, polyethylene, and polypropylene, polyvinylidene chloride, polycarbonate, polyvinyl alcohol, and ethylene-propylene. Film of copolymer, ethylene-acrylic acid copolymer, saponified ethylene-vinyl acetate copolymer, etc., or films coated with polyvinylidene chloride on these films, or aluminum, silicon oxide, aluminum oxide, indium oxide, oxidation A film subjected to vapor deposition of tin, zirconium oxide or the like can be used. Further, as the intermediate layer, one or more of these materials can be used in combination. Note that the thickness of the intermediate layer only needs to satisfy the function required as a packaging bag, and can be appropriately selected as necessary.
[0022]
The composite film can be obtained by laminating the base material layer 31, the heat seal layer 33, the intermediate layer 32, and the like as appropriate using a known dry lamination, T-die pressing method, or the like. When the T-die extrusion method is used, an anchor coating agent may be preliminarily applied to the extruded side film or the like for the purpose of improving adhesiveness.
[0023]
The structural example by the concrete material of the composite film which forms the pouch of this invention is demonstrated.
As described above, the pouch of the present invention is composed of four members that are arranged in such a manner that the surfaces having the respective heat seal properties face each other in the front-rear and left-right directions. And a pouch is bag-made by the heat seal of those inner surfaces. Therefore, the composite film forming the pouch has a heat sealability on at least one side as a material configuration, and the film used may have the same configuration in any part, or the front member and the rear surface The members may be the same composite film, and the left and right side members may be separate composite films.
And as the composite film, a laminated film mainly made of plastic is used, but it is not particularly limited, and any known laminated film used in various pouches can be used. From these, it is possible to freely select and use a suitable one according to use conditions such as the type and filling amount of the contents to be packaged and the presence or absence of heat treatment after filling.
[0024]
Specific examples of the composition of the composite film that can be preferably used in common on any surface formed by the pouch of the present invention include the following.
(1) ON / AD / LLDPE
(2) ON / AC / <HDPE / LLDPE>
(3) ON ・ SiO _X / AC / <HDPE / LLDPE>
(4) PET / AD / AL / AD / ON / AD / LLDPE
(5) PET / AD / AL / AD / ON / AD / S-PE
(6) PET / AD / AL / AD / ON / AD / CPP
(7) PET / AD / ON / AD / AL / AD / LLDPE
(8) PET / AD / ON / AD / AL / AD / S-PE
(9) PET / AD / ON / AD / AL / AD / CPP
(10) PET / AD / EVOH / AD / ON / AD / CPP
(11) ON / AD / HDPE / AD / LLDPE
(12) ON / AD / PP / AD / LLDPE
[0025]
In addition, although the said material structural example was described in the symbol, the symbol represents the following material or layer, respectively.
ON: Biaxially stretched nylon film, AD: Adhesive, LLDPE: Linear low density polyethylene, AL: Aluminum, HDPE: High density polyethylene, LDPE: Low density polyethylene, PP: Polypropylene stretched film, S-PE: Metallocene Ethylene-α / olefin copolymer polymerized using catalyst, PET: Biaxially stretched polyester film, CPP: Unstretched polypropylene film, SiO _x : Silica vapor deposition AC: Anchor coat, EVOH: Saponified EVOH: Ethylene-vinyl acetate copolymer Yes, and <> indicates coextrusion.
In addition, the anchor coat is a kind of primer coat that is pre-coated on the base film side in order to improve adhesion when the resin is laminated by extrusion coating.
And aluminum foil, a silica vapor deposition layer, EVOH film, etc. are laminated | stacked in order to provide gas barrier property.
[0026]
In addition, as the heat seal layer 33, two types of examples, an LLDPE film and a CPP film, are given. The LLDPE film is excellent in heat seal stability, content resistance, stress cracking resistance, etc. It has excellent heat resistance and low odor, and is suitable for packaging contents that require these performances.
[0027]
In addition to the above, the heat seal layer 33 has an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer, an ethylene / acrylic acid ester copolymer, an ionomer, a polyester resin, and a metallocene based on the content to be filled. An ethylene-α / olefin copolymer polymerized using a catalyst can also be appropriately selected and used.
[0028]
The pouch of the present invention can be equipped with a spout.
The spout assembly to be mounted on the pouch of the present invention may be one in which an obstruction prevention rib extending to the inside of the container is formed at the bottom of the spout body when mounted on the container body.
[0029]
If necessary, the pouch of the present invention may be stored in a deformed carton having a shape suitable for the pouch shape or a plastic molded container. For example, it can be stored in a carton and used as an ink cartridge container for a printing press, or a container such as a stock solution (concentrated liquid packaging) for a cup-type vending machine. In these applications, a pouch equipped with a spout is preferable.
[0030]
When the contents of the pouch of the present invention are filled, as shown in FIG. 1 (c) or FIG. 1 (d), the container becomes a three-dimensional container while being a pouch. In addition, since the front surface portion and the rear surface portion form a gradient, it is easy to set the device on the cartridge container receiving portion or the like.
The pouch of the present invention can be manufactured using a known bag-making machine, and can be manufactured without reducing the bag-making speed.
[0031]
【The invention's effect】
The pouch of the present invention is a pouch having side gusset portions with different widths on the left and right sides, and is filled and sealed with the contents, so that the narrow side surface faces downward so that the front portion and the rear portion are inclined. Therefore, stable setting is possible by adjusting the slope to the side slope of the receiving part of the device. Despite the deformation of the pouch of the present invention, its productivity does not decrease compared to conventional bag making.
The pouch of the present invention can be combined with the exterior, and the exterior and the pouch of the present invention can be separated and collected and processed.
[Brief description of the drawings]
1A and 1B are diagrams showing an embodiment of a pouch according to the present invention, where FIG. 1A is a front view, FIG. 1B is a perspective view of the pouch filled with contents, and FIG. is there.
2A and 2B are diagrams for explaining the structure of a pouch according to the present invention, in which FIG. 2A is a conceptual diagram showing each member separately, and FIG.
FIG. 3 is a diagram illustrating an oblique seal portion and a cut-off portion of a pouch.
FIG. 4 is a perspective view showing an embodiment of a spout attached to the pouch of the present invention, and shows a method of attaching the spout to the (a) spout, (b) spout body, and (c) the pouch.
FIG. 5 is a cross-sectional view showing the configuration of a laminate that forms the pouch of the present invention.
6A is a perspective view of a conventional side gusset pouch, FIG. 6B is a cross-sectional view of X2-X2, a perspective view of a spout, and FIG. 6D is a perspective view of a pouch equipped with a spout.
[Explanation of symbols]
h Gusset line
W gusset tucking width 1 pouch 3 front member 4 rear surface member 5 side member 6 side member 7 side Lumpur portion 8 side Lumpur portion 9 the upper seal portion 10 lower seal portion 11 obliquely seal unit (1)
12 oblique seal section (2)
13 oblique seal portion (3)
14 oblique seal portion (4)
15 Cut-off part (1)
16 Cut-off part (2)
17 Cut-off part (3)
18 Cut-off part (4)
19 Unsealed part 20 Outlet body 21 Flange surface (first flange part)
22 Outer cylinder portion 23 Adhesive base 24 Screw 25 Second flange portion 26 Third flange portion 27 Connection portion 28 Blocking prevention rib 29 Cap 30 Laminate 31 forming pouch Base layer 32 Intermediate layer 33 Heat seal layer 34 Adhesive layer 50 side gusset pouch 51 the front member 52 the rear surface member 53 side member 54 side member 56 side Lumpur portion 57 side Lumpur portion 58 the upper seal portion 59 lower seal portion 60 spout

Claims (2)

Side members in which at least one surface of each member is made of a heat seal layer, and the front member and the rear member are folded in two from the left and right, with the surfaces made of the heat seal layer facing each other. Is inserted between the front member and the rear member, side seal portions are provided at both side ends thereof, and the side member is folded in half at the center, and the left and right side members are folded. A spout assembly comprising a side gusset pouch having a narrower side member serving as a lower surface of the pouch and further having a seal portion provided at the upper and lower portions thereof and an obstruction prevention rib extending into the pouch. A pouch characterized by having been installed. The pouch according to claim 1, wherein an oblique seal portion is provided at least at one or more corners of the pouch, and an outer portion of the oblique seal portion is cut off.

Images