JP2000006988A - Self-standing pouch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cause a pouch filled with contents to stably stand by itself by heat-sealing respectively a front panel to a gusset panel and a rear panel to the gusset panel on a bottom to provide a boat-shaped seal and by forming a notch at a corner of the seal. SOLUTION: When a front panel 1 and a rear panel 2 are overlaid with their respective heat-sealing faces facing, gusset panels 3L, 3R are inserted into both left and right sides to provide seals 4 on side ends of a pouch, and also a bottom is sealed with an end of either of the gusset panels 3L, 3R as a bottom of the pouch. A seal at the time of sealing the pouch bottom is of a boat shape. After a boat-shaped seal 5 is applied, corners of the bottom formed by the front panel 1, the rear panel 2 and the left and right gusset panels 3L, 3R are cut off. Thus when the pouch is made to stand by itself with contents filled, the bottom is stable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pouch made of a flexible sheet and having excellent autonomy.

[0002]

2. Description of the Related Art Pouches of various shapes have been put to practical use for accommodating contents such as solids, granules, powders, and liquids to impart self-sustainability. FIG. 5 shows an example of a conventional self-supporting pouch.
(A) a front view, (b) X ₄ -X ₄ cross-sectional view, an illustration of a structure, such as the panels (c) self-supporting pouch. FIG. 6 shows another embodiment of the conventional self-supporting pouch, in which (a) is a perspective view in a filled state, (b) is a side view {g ₂ }, (c) is a bottom view {g ₃ }, (d). FIG. 5 is an explanatory view of a configuration of a panel or the like of a self-supporting pouch, and (e) is a front view of the pouch before filling. FIG.
Is yet another example of a conventional self-supporting pouch, wherein (a)
Front view of the self-supporting pouch before content filling, a bottom view, (c) X ₅ -X ₅ parts sectional view when filled with (b) content. A conventional self-supporting pouch is, for example, a pouch 50 having a shape as shown in FIG. Its structure is shown in FIG.
As shown in FIG. 5 (b) and FIG. 5 (c), the pouch is composed of a front panel 51, a rear panel 52 and a bottom member 53 made of a sheet having heat sealing properties on at least one side. The panel 52 and the respective heat-sealing surfaces face each other, and the front panel 51
A pouch 50 is formed by scissoring a bottom member 53 bent in a V-shape with the heat sealing surface outside on the bottom thereof and heat-sealing the periphery of the pouch.
Another pouch of self-sustainability is a pouch 6 as shown in FIG.
0, and the front panel 61 is made of a sheet made of a layer having a heat sealing property on at least one side as in the above-described example.
The pouch 60 includes a rear panel 62 and side panels 63L and 63R. The front panel 61 and the rear panel 62 face each other with their heat sealing surfaces facing each other. The pouch 60 is formed by scissoring the side panel 63 which is bent on both sides with the heat sealing surface outside, and heat-sealing the periphery thereof. Further, as shown in FIG. 7 (a), there is a pouch for preventing the contents from entering the corner of the pouch and hindering the independence of the pouch by forming a ship bottom seal 75. Then, the corner K 'of the pouch 1 is cut off into a triangular shape while leaving a seal width capable of maintaining the sealing performance of the pouch.

[0003]

As shown in FIG. 5, the self-supporting pouch 50 can obtain excellent self-sustainability by properly designing the material of the pouch. When filling in a case after sealing it, since the upper part of the pouch is flat due to its structure, a useless space is generated in the upper part in the case. In order to reduce the waste of the space, half of the pouches are sometimes stored upside down in a case. When such a storing method is performed, the operation becomes complicated, and the productivity is deteriorated. In addition, the self-standing pouch 60 as shown in FIG.
After the contents are filled, the pouch 50 is likely to be in a brick shape, and is excellent in storage in the case as compared with the self-standing pouch 50. However, since the self-supporting pouch 60 has the bent piece 65 at the bottom thereof, if the content is filled to make the pouch self-standing on a flat surface, as shown in FIG. It often fell due to repulsion F. Then, the pouch provided with the ship bottom seal portion is not self-sustainable due to the rebound of the bottom film as it is, and as shown in FIG. 7 (a), the corner of the ship bottom seal portion is cut off into a triangular shape. Although the independence was slightly improved, the finished appearance as a pouch tended to be lacking as shown in FIG. 7 (b). In addition, in the packaging material supply section of the packaging machine, the feeding was sometimes unstable.

[0004] In general, it is desirable to make a pouch filled with contents self-sustaining in any step or process of storage, transportation, and storage because of good storage in cardboard or the like. This is an advantage that the display shelves are also arranged in a line. Therefore, an object of the present invention is to provide a pouch that can stably stand by itself when the bottom of the pouch filled with the contents is folded to stand by itself.

[0005]

Means for Solving the Problems A front panel and a rear panel, at least one side of which is made of a heat-sealing sheet, are overlapped with the heat-sealing surface facing each other,
A gusset panel formed by folding a sheet having at least one side heat-sealable into a V-shape with the heat-seal surface facing outside is sandwiched between the two sides, and the peripheral edges of the front panel, the rear panel, and the gusset panel are heated. A pouch formed so as to be self-supporting at the bottom by sealing, the front panel and the gusset panel and the rear panel and the gusset panel at the bottom are each heat-sealed to a bottom type, and a bottom type sealing portion is provided. A self-supporting pouch in which a cutout portion is formed at a corner of the ship bottom seal portion, wherein each of the following inventions, the notch portion is a region below an extension line extending a bottom side of the ship bottom seal portion. Is a cut-off part formed by cutting off
The cut-off portion is cut off along a cutting line parallel to the bottom side, the cut-out portion is a cut-out portion formed by cutting out a partial area of the corner, The dropping portion may be formed by dropping a region of at least half of the corner at an extension of the bottom of the ship bottom seal portion, and the pouch may include a spout.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A self-supporting pouch according to the present invention is provided with a bottom seal at the bottom of a pouch having gusset portions on both left and right sides, and a corner at a corner which can maintain a sealing system by the bottom seal. Is obtained by cutting off or dropping out. Hereinafter, the present invention will be described in detail with reference to drawings and the like, but the present invention is not limited to the shape used in the description.
FIG. 1 shows an embodiment of the pouch of the present invention, (a) a perspective view in a filled state, (b) a bottom view of the same, (c) a front view of the pouch before filling, (d) an enlarged bottom view, and (e). FIG. 3 is a cross-sectional view of part X ₁ -X ₁ . FIG. 2 shows (a) a perspective view of a filled state and (b) an explanatory view of a spout to be mounted on the pouch, showing another embodiment of the pouch of the present invention. (C) It is explanatory drawing of another spout. FIGS. 3 (a) and (b) are front views of a folded pouch prior to filling, respectively, of yet another embodiment;
(C) and (d) are bottom views in a state where the contents are filled, and (e) and (f) are cross-sectional views of X ₂ -X ₂ and X ₃ -X ₃ , respectively. FIG. 4 is an explanatory diagram of dropout in the self-supporting pouch of the present invention.

The structure of the pouch according to the present invention is shown in FIG.
As shown in (e), the front panel 1 and the rear panel 2 are overlapped with their respective heat-sealing surfaces facing each other. At this time, the heat-sealing surfaces are folded outward in a V-shape on both left and right sides. Insert the gusset panels 3L and 3R to provide a seal 4 at the side end of the pouch,
A bottom sealed pouch having one end of the gusset panel as a bottom of the pouch, in which contents are filled from an open top side, and the top side end is heat-sealed and sealed. .

Further, in the present invention, the pouch may be provided with a spout made of a plastic molded product as shown in FIG. An example of the structure of the spout made of the plastic molded article will be described later, but in the present invention, the presence or absence of the spout, and the shape of the spout when mounted, etc. are not particularly limited. .

A self-supporting pouch according to the present invention is characterized in that it has a shape including a seal portion at the bottom of a double gusset type pouch. The shape of the seal when sealing the bottom of the pouch is a seal shape generally called a ship bottom, as shown in FIG. Then, after or at the same time as the ship bottom seal 5 is applied, the corners of the bottom formed by the front and rear panels and the left and right gusset panels are cut off or cut into a desired shape.

A first embodiment of the self-supporting pouch of the present invention is:
The cut-off portion is provided by cutting out the corner of the bottom seal. In the present invention, as shown in FIG. 1C or FIG. 1D, the shape of the cut-off includes a cutting line h parallel to the bottom of the pouch.
Further, by setting the cutting line h above the extension line p of the bottom side f of the ship bottom-type seal portion, a region below the extension line p is cut off. When the pouch is self-supporting, the rebounding of the component film at the bottom side f and the extension line p of the bottom seal part hinders the self-sustainability of the pouch, but the cutout area Kt is changed to the bottom seal part. The pouch is filled with the contents by cutting the bottom line f from the extension line p extending the extension line p, in other words, by cutting off the position q of the cutting line h on the extension line p. Fig. 1
As shown in (b), it became stable and the pouch became more self-sustaining. Also, the supply of pouches in the packaging machine becomes stable. In addition, since a cut line parallel to the lower end of the pouch is provided in the cut-off portion shape, the bottom surface of the pouch when the pouch is self-standing is shown in FIG.
It became stable and good in appearance.

A second embodiment of the self-supporting pouch of the present invention is:
As shown in FIG. 3 (a) or FIG. 3 (b), a drop-out portion Kh is provided at a corner of the ship bottom seal portion 5.
It is assumed that the dropout portion Kh exists on an extension of the bottom side f of the ship bottom seal portion 5. The shape of the cut-out portion Kh may be a triangle as shown in FIG. 3A or a rectangle as shown in FIG.
Further, in the drop-out of the self-supporting pouch according to the present invention, as shown in FIG. 4, the length w ₀ of the drop-out portion Kh on the extension of the base f is the length of each side of the base f. it is preferable to assume that more than half of the w _2. Length on the extension line of the vent off portion Kh is in the case of 1/2 or less of the length w ₂ on both sides of the lowermost portion of the vessel bottom seal part, it is self-supporting lowered.

The present invention can also be applied to a pouch having a spout on the top as shown in FIG. The spout in this case is composed of a spout main body 11 and a cap 12 as shown in FIG. 2 (b). Although not shown, a type using an inner plug may be used as necessary. The spout body 11 and the cap 12 are usually screwed together in a hermetically sealed state. In this case, the tube portion 14 serving as the spout of the spout body 11 has a cylindrical shape, and a screw is formed on the outer surface of the cylinder. 13s, and the cap comprises a circular top plate and a skirt portion hanging down from the outer edge of the top plate. A screw (not shown) is provided inside the skirt portion, and the screw is provided on the outer surface of the cylindrical portion. The plug can be sealed by screwing with the set screw 13s. Usually, after the spout body 11 is mounted on the pouch, the contents are filled from the spout cylinder. As shown in FIG. 2B, the structure of the spout main body has a flange 15a, and one of the flanges 15a is outside the pouch 1 when attached to the pouch 1, and serves as a spout for contents. Tube part 1
4 is formed, and further flanges 15b, 15c and the like can be provided on the cylindrical portion as needed. Further, an adhesive base 16 that is thermally fused to the inside of the upper side of the pouch 1 is provided on the other side of the flange 15a. The adhesive base 16
In order to ensure that the upper side of the pouch 1 can be heat-sealed, it is desirable to form the pouch 1 into a shuttle shape in a bottom view. As shown in FIG. 2C, a rib 17 extending from the adhesive base may be provided below the adhesive base 16 in the spout main body 11. The extension rib,
This is for preventing the pouch from being closed when the contents are poured out from the pouch.

The spout can be formed by injection molding using a synthetic resin as a material. The resin for molding the spout body is selected from materials that can be heat-sealed with the resin on the inner surface of the pouch. Specific examples of the resin used for molding the spout body include low to high density polyethylene, polypropylene, ethylene / vinyl acetate copolymer, and linear low density polyethylene. The cap may be screwed into a screw provided on the outer surface of the cylindrical portion of the spout body and hermetically sealed. The material is selected from those which have good moldability and do not adversely affect the contents. Specifically, low density to high density polyethylene, polypropylene, polyester, polyamide,
Polycarbonate and the like. The resin used for molding the spout body and the resin used for molding the cap are:
The same kind of resin or a different kind of material may be used, but in any case, by making the molded spout main body and the cap different in rigidity, the screwing is ensured.

Next, the material of the sheet constituting the pouch according to the present invention will be described. The material of the bag used for the spout pouch of the present invention is as follows. Base layer / adhesive layer / heat sealant layer B. B. base layer / adhesive layer / barrier layer / adhesive layer / heat sealant layer It is a material composition such as a base material layer / adhesive layer / barrier layer / adhesive layer / reinforcement layer / adhesive layer / heat sealant layer. As the self-supporting pouch according to the present invention, the amount of contents stored in the pouch is 100 to
It is in the range of 2,000cc. If the content is less than 100cc, there is little need to make the pouch self-supporting and 2,000cc
When storing contents exceeding the limit, it is better to use a paper container or a bag-in-box containing a pouch in a carton than a pouch instead of using a pouch. In addition, stable independence can be obtained, and the cost as a packaging material is low. The thickness is 30 to 200 as a total thickness.
μm, and more preferably 60 to 150 μm. If the total thickness is less than 30 μm, it is difficult to impart independence regardless of the shape of the pouch, and the total thickness is 200 μm.
If it exceeds m, heat sealing for assembling the pouch may be difficult, or the sealing strength may be unstable. The front panel and the rear panel are made of the same material, and the left and right side panels may have the same specifications as the front and rear panels,
Further, another material configuration may be used. By using a material that is more flexible than the front and rear panels as the material of the left and right side panels, the pouch when the contents are filled can be easily spread. That is, it means that the contents can be settled quickly.

[0015] The packaging material is designed within the range of the content and the total thickness of the packaging material constituting the pouch as described above. The configuration of the packaging material used for the pouch for storing the contents of such a condition may be two layers consisting of a base material layer and a heat sealing layer (three layers when an adhesive layer is formed),
An intermediate layer is laminated between the two layers. The intermediate layer may be formed by laminating one layer or two or more layers for the purpose of further increasing strength, improving barrier properties, imparting light-shielding properties, and the like as the packaging material.

The base material layer is often used as a printing base material, and therefore has heat resistance and tensile strength.
A film having good printing ink receptivity is desirable. Specifically, a stretched or unstretched film of polyester, polypropylene, polyamide or the like can be used.

As the barrier layer, a material having a necessary barrier property is selected in accordance with the type of contents, the expiration date of beverages, foods, and the like, and other factors such as expiration dates. Specific materials include aluminum foil, or a film made of nylon, polyvinylidene chloride, polyester, polyvinyl alcohol, a saponified ethylene-vinyl acetate copolymer, or an inorganic oxide such as aluminum or silicon oxide. An object obtained by vapor deposition may be used.

The reinforcing layer is used to improve the strength of the pouch, particularly, the puncture resistance, the drop impact resistance, and the like.
The reinforcing layer is laminated between the base material layer and the sealant layer.
Specifically, a film made of polyamide, polycarbonate, polyester, or the like is used.

For the heat sealing strength, the type, thickness, and the like are selected depending on the type of the contents, the content, the method of use, and the presence or absence of heat treatment. As specific resins, low-density to high-density polypropylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, ethylene ethyl acrylate, ethylene acrylic acid, ethylene methacrylic acid, ethylene methyl acrylate, ionomer, etc. may be used. it can.

[0020]

[Example 1] As a self-supporting pouch of the present invention,
A pouch having a shape as shown in FIG. 1 (c) was created, and the effect of its independence was confirmed. The conditions in this embodiment are as follows.・ Sheet material of pouch 1) Front panel and rear panel PET12 / VM-PET12 / ON15 / S-PE100 ｛Abbreviation PET: Polyester film, VM-PET: Silicon oxide evaporated polyester film, S-PE: Single site type
(Ethylene-α olefin copolymer film polymerized using PE catalyst, the number after each symbol indicates thickness μm, the same applies hereinafter) 2) Left and right gusset panels PET12 / VM-PET12 / ON15 / S-PE80 Contents: Sports drink 300ml ・ Dimensions of each part of the pouch: Outer dimensions in the folded state: 85mm × 170mm Gusset width: 55mm Edge seal width: 5mm Ship bottom seal shape and cut off shape: As shown in Fig. 1 (d), ship bottom The width between the upper end of the seal portion of the mold seal portion and the lower end of the pouch is 10 mm, and the distance between the extension and the cutting line parallel to the bottom of the pouch in cutting off and the lower end of the pouch is
13 mm. That is, the cutting line is 3 mm from the extension line.
Positioned above. Comparative Example 1 The conditions were the same as in the example except for the shape of the seal at the bottom and the shape of the blank. Bottom seal: 10 mm straight seal Cut off: None <Result> There was a remarkable difference in independence. Pick the top,
When placed quietly on a flat surface, all of the 10 bags were free standing in the example, but 7 bags were free standing and 3 bags were not free standing and fell in 10 bags in the comparative example.

[0021]

According to the method of the present invention, in order to improve the self-sustainability of a pouch having improved self-sufficiency, particularly a pouch with a spout, the seal shape of the bottom portion of the pouch-shaped part and the cutting or cutting off of the seal portion are performed. As a result, when filled with liquids, fluids, powders, and the like, a pouch with extremely excellent self-sustainability could be obtained.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a pouch of the present invention, (a) a perspective view of a filled state, (b) a bottom view of the same, (c) a front view of the pouch before filling, (d) an enlarged bottom view, (e). ) X ₁ -X ₁ part sectional view

FIG. 2 shows (a) a perspective view of a filled state and (b) an explanatory view of a spout to be mounted on the pouch, showing another embodiment of the pouch of the present invention. (C) Illustration of another spout

FIGS. 3 (a) and 3 (b) show yet another embodiment of the pouch of the present invention. FIGS. 3 (a) and 3 (b) are front views of the folded pouch before filling, respectively, and FIGS. It is a bottom view in the state where the content was filled, (e) and (f) are X
It is the respective cross-sectional view of a _{2 -X 2, X 3 -X 3} . It is.

FIG. 4 is an explanatory view of dropout in a self-supporting pouch of the present invention.

Figure 5 shows an example of a conventional self-supporting pouch, (a) front view, (b) X ₄ -X ₄ cross-sectional view, the illustration Figure 5 configuration of each panel, etc. (c) self-supporting pouch, Shows an example of a conventional self-supporting pouch,

FIG. 6 shows another embodiment of a conventional self-supporting pouch.
(A) a perspective view of a filled state, (b) a side view {g ₂ },
(C) Same bottom view {g ₃ }, (d) Explanatory drawing of the configuration of a panel or the like of a self-supporting pouch, (e) Front view of the pouch before filling

FIG. 7 is yet another example of a conventional self-supporting pouch,
(A) the contents of a front view before filling, bottom view, (c) X ₅ -X ₅ parts sectional view when filled with (b) content

[Explanation of symbols]

 P Self-supporting pouches Kt, Kh, K 'Cut-out part, cut-out part C Contents f Bottom of bottom seal part h Top line of bottom cut-out m Lower end of pouch 1 Front panel 2 Rear panel 3l, 3R Gusset panel 4 Side seal Part 5 Ship bottom type seal part 10 Outlet 11 Outlet main body 12 Cap 13s, 13c Screw 14 Tube part 15 Flange 16 Adhesive base 17 Rib 50 Conventional pouch 51 Front panel 52 Rear panel 53 Bottom member 54 Seal part 60, 70 Conventional part Pouches 61, 71 Front panel 62, 72 Rear panel 63, 73 Gusset panel 64, 74 Seal part 65 Bottom bent piece 75 Conventional boat bottom seal part of pouch

Continuation of the front page (72) Inventor Koji Otsuka 1-1-1 Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo F-term in Dai Nippon Printing Co., Ltd. 3E064 AA13 AB23 BA26 BA29 BA30 BA36 BA54 BB03 BC18 EA30 FA04 HN65 HS04

Claims (6)

[Claims] 1. A front panel and a rear panel, each having at least one surface made of a heat-sealing sheet, are overlapped with their heat-sealing surfaces facing each other, and a sheet having at least one surface having a heat-sealing property is provided between both sides. A pouch formed so as to sandwich a gusset panel folded in a V-shape with the heat sealing surface on the outside and heat-sealing the front panel, the rear panel, and the peripheral edge of the gusset panel to be self-supporting at the bottom, The front panel and the gusset panel and the rear panel and the gusset panel at the bottom were each heat-sealed to a ship bottom type to provide a ship bottom type seal part, and a cutout was formed at a corner of the ship bottom type seal part. An autonomous pouch characterized by the following. 2. The cut-out portion is a cut-out portion formed by cutting off a region below an extension line extending from a bottom side of the ship bottom-type seal portion.
Self-sustaining pouch as described. 3. The cut-off portion is cut off along a cutting line parallel to the bottom side.
Self-sustaining pouch as described. 4. The self-supporting pouch according to claim 1, wherein said cutout portion is a cutout portion formed by cutting out a partial area of said corner. 5. A method according to claim 1, wherein said drop-out portion is one-half of said corner at an extension of a bottom side of said bottom seal.
5. A self-supporting pouch according to claim 4, wherein said area is omitted. 6. The self-supporting pouch according to claim 1, wherein the pouch has a spout.