JP2015006891A - Self-standing pouch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-standing pouch that enables fluid contents to be taken out in small quantities and that can maintain self-standing properties until completion of use.SOLUTION: A self-standing pouch includes an inner bag 3 which is made of a synthetic resin film and filled with fluid contents W, and an outer bag 5 which is made of a synthetic resin film, which has a side seal part 55, which can self-stand by a bottom and which can house the inner bag 3. In the self-standing pouch, a sealed space 7, in which a fluid is encapsulated, is formed between the inner and outer bags 3 and 5, and a three-dimensional shape of the outer bag 5 is retrained by pressure of the fluid encapsulated in the sealed space 7. A resealable plug part 9 is attached to the inner bag 3, and the side seal part 55 of the outer bag 5 is folded back via a folded part 54.

Description

  The present invention relates to a pouch made of a synthetic resin film capable of consuming small amounts of fluid contents such as soy sauce, sauces, beverages, etc., and particularly capable of being self-supporting as a double structure of an inner bag and an outer bag. About pouches.

Conventionally, rigid containers such as glass bottles and plastic bottles are used as containers for contents that can be consumed in small quantities without being consumed at one time with fluid foods, but in recent years, from the viewpoint of facilitating disposal, A pouch made of a synthetic resin film that can be folded flat and reduced in volume has been desired.
However, in a general standing pouch, when the contents are sufficiently contained, the bottom film part expands three-dimensionally and maintains independence. However, if the contents become small, the independence is lost, so the independence is assisted. A separate auxiliary tool was necessary to do this.

As a prior art for maintaining the independence of the pouch itself without using an auxiliary tool, Patent Document 1 provides a content storage portion as an inner bag inside an outer bag having a bottom gusset, and the inner bag and the outer bag. A double free-standing bag is disclosed in which a space such as air is filled with a gas such as air to inflate the outer bag.
However, the double self-supporting bag of Patent Document 1 is designed to protect the contents that are vulnerable to impact, and has a structure in which the bag is opened and the contents are taken out at a time when used. The released gas was lost and the independence was lost. Therefore, it cannot be used as it is as a container for taking out the fluid contents in several portions.

  As another prior art, Patent Document 2 discloses a flexible container having a multilayer structure with a space around the outer periphery of the container in order to form a heat insulating layer or a cold insulation layer on the outer periphery of the container formed of a flexible sheet. It is disclosed. However, the container described in Patent Document 2 has no description regarding self-supporting property, and there is no clear description of the shapes of the inner bag and the outer bag.

JP 2010-275018 A JP-A-2005-306420

  The present invention has been made to solve the above-mentioned problems of the prior art, and the object of the present invention is to provide a self-supporting pouch that can dispense a fluid content and can maintain its independence until it is used up. It is to provide.

In order to achieve the above object, the present invention provides an inner bag made of a synthetic resin film filled with a flowable content, and a synthetic bag containing the inner bag that has a side seal portion and can be self-supported at the bottom. An outer bag made of a resin film,
In a self-supporting pouch in which a sealed space in which a fluid is sealed is formed between the inner bag and the outer bag, and the three-dimensional shape of the outer bag is maintained by the fluid pressure sealed in the sealed space,
The inner bag is attached with a resealable plug part,
The side seal portion of the outer bag is folded back via a bent portion.

According to the self-standing pouch of the present invention, the cap is provided in the inner bag, and the fluid is sealed in the sealed space between the inner bag and the outer bag. The three-dimensional shape is maintained, the fluid content can be dispensed, and the independence can be maintained until the use is completed.
Furthermore, since the side seal portion of the outer bag is folded back, the self-supporting property can be further improved in combination with the maintenance of the three-dimensional shape by the fluid, and the standing shape of the pouch can be improved when the contents are reduced. In addition, when gripped with a hand, the edge of the side seal portion does not touch the hand, and the usability is improved.

The present invention can be further configured as follows.
1. A check valve that allows the outflow of contents and prevents the inflow of air is provided in the plug portion.
In this way, oxidative deterioration of the contents can be prevented.
2. Moreover, let the fluid enclosed be an inert gas.
By the inert gas, the effect of delaying oxygen penetration into the contents can be expected, and the preservation of the contents can be improved.
3. The width dimension of the inner bag is made 20 mm or more shorter than the width dimension of the outer bag.
If it is smaller than 20 mm, a fluid sufficient to make the pouch self-supporting does not enter the entire circumference of the gap between the inner bag and the outer bag.
4). Further, the vertical dimension of the inner bag is made 10 mm or shorter than the vertical dimension of the outer bag.
In this way, the inner volume of the inner bag can be increased as much as possible. That is, it can be close to about 10 mm, and if it is smaller than 10 mm, it is difficult for the fluid to wrap around the entire gap.
5. Furthermore, if the outer bag is a standing pouch with a bottom film, the self-supporting stability is improved.
6). Moreover, the folding width | variety of the bottom film of an outer bag shall be 30 mm or more.
If it does in this way, it will become self-supporting enough when opened.

BRIEF DESCRIPTION OF THE DRAWINGS The self-supporting pouch which concerns on Embodiment 1 of this invention is shown, (A) is a front view, (B) is a side view. (A) is a back view of the self-standing pouch of FIG. 1, and (B) is a top view. (A) thru | or (C) is a schematic explanatory drawing which shows the manufacturing process of the self-supporting pouch of FIG. (A) is an enlarged cross-sectional view of the spout portion of FIG. 1, (B) is a cross-sectional view of the spout constituting the spout portion, and (C) is an upper surface of the spout opening portion with the check valve of the spout removed FIG. (A) And (B) is sectional drawing which shows the state before and behind consuming the contents. (A) thru | or (C) are sectional drawings which show the operation state of the check valve of a spout. The self-standing pouch concerning Embodiment 2 of the present invention is shown, (A) is a front view and (B) is a partial expanded sectional view in the state where the hinge cap of (A) was closed. (A) thru | or (D) is a schematic explanatory drawing which shows the filling process of the self-supporting pouch of FIG.

The present invention will be described below based on the illustrated embodiments.
[Embodiment 1]
In FIG.1 and FIG.2 which show the self-supporting pouch which concerns on Embodiment 1 of this invention, 1 has shown the self-supporting pouch whole. This self-supporting pouch 1 includes an inner bag 3 made of a synthetic resin film filled with fluid contents W such as soy sauce, sauce, beverage, and an outer bag 5 made of a synthetic resin film in which the inner bag 3 is stored, And a sealed space 7 in which a gas is sealed is formed between the inner bag 3 and the outer bag 5. The shape of the outer bag 5 is three-dimensionally held by the gas pressure sealed in the sealed space 7. A re-sealable plug 9 is attached to the inner bag 3, and side seal portions 55, 55 extending in the vertical direction of the outer bag 5, as shown by a two-dot chain line in FIG. It is folded back via the bent portions 54, 54.
The inner bag 3 is constituted by a so-called flat pouch, and as shown in detail in FIGS. The side seal portions 33 and 34 and the bottom seal portion 35 are heat sealed. Both corners of the bottom are rounded in an arc shape. Between the openings on the upper side, heat sealing is performed with the spout 93 of the plug portion 9 being sandwiched, and a top seal portion 36 is formed.

As shown in FIGS. 3 and 4, the spout portion 9 includes a spout 93 and a screw cap 95 that opens and closes the spout 93.
The spout 93 has a boat-shaped mounting portion 93a sandwiched between the top seal portions 36 of the inner bag 3, and a mouth and neck portion 93b extending outward from the mounting portion 93a. Inside the mouth-neck part 93b, a bottomed cylindrical partition wall 93c is provided so as to separate the flow path, and the bottom part of the partition wall 93c serves as a valve seat part 93h, and is poured out through the valve seat part 93h. An opening 93d and a check valve 94 for opening and closing the dispensing opening 93d are provided.

The check valve 94 allows the outflow of the contents in the inner bag 3 and prevents the inflow of air from the outside into the inner bag 3. In this example, as shown in FIG. It has an umbrella structure having a mounting portion 94a and a valve portion 94b. That is, the mounting portion 94a is inserted and fixed in an engagement hole 93f of a valve mounting portion 93e provided in the valve seat portion 93h, and the valve portion 94b is bent by the differential pressure between the inside and the outside of the inner bag so that the dispensing opening 93d is formed. It is designed to be opened and closed.
The valve mounting portion 93e has a disc shape, is disposed at the center of the pouring opening 93d, and has a cantilever shape that is fixed to the outer peripheral edge of the pouring opening 93d through an elastic piece 93g. It has an annular opening shape surrounding the outer periphery of the valve mounting portion 93e.
The check valve 94 is seated on the seat surface of the valve seat portion 93h and seals the dispensing opening 93d (normally closed) when the pressure difference between the internal pressure of the inner bag 3 and the outside is a predetermined pressure or less. If it becomes above, it will be in a valve opening state.
When the screw cap 95 is attached, the check valve 94 is pressed by a pressing member 95 a provided on the screw cap 95.

  The outer bag 5 is a so-called standing pouch, and is constituted by three films of a front film 51, a rear film 52, and a bottom film 53. The front film 51 and the rear film 52 have a quadrangular shape, and the left and right side portions overlapped are heat-sealed with a predetermined width at the side seal portions 55 and 55, and the bottom film is formed on the lower end portions of the front film 51 and the rear film 52. 53 is sandwiched between the lower end portions of the front film 51 and the rear film 52 in a folded state and is sealed by a bottom seal portion 56. The bottom film 53 is partially cut off at the left and right side portions of the bottom seal portion 56, and the front film 51 and the rear film 52 are heat sealed through the cutout portion 58.

The upper end portion of the outer bag 5 is overlapped and heat sealed so as to sandwich the top seal portion 36 of the inner bag 3 to form a top seal portion 57, and the gap between the inner bag 3 and the outer bag 5 is sealed. As shown in FIG. 1 (B), the sealed space 7 is filled with gas, and the front film 51 and the rear film 52 swell forward and backward, and the bottom film 53 opens back and forth in a boat-like shape. The lower end is grounded and held in a self-supporting state. From the viewpoint of preventing oxidation of the contents W, the gas is preferably an inert gas such as nitrogen.
On the other hand, the side seal portions 55 and 55 of the outer bag 5 are folded back with the bent portion 54 as a boundary. The bent portion 54 may be located in the middle of the side seal portions 55, 55, or may be positioned slightly away from the inner edge of the side seal portions 55, 55 by a predetermined dimension.

Next, the manufacturing process of the self-standing pouch will be described with reference to FIG.
The inner bag 3 is heat-sealed by sandwiching the mounting portion 93a of the spout 93 constituting the spout portion 9 in the upper opening portion of the inner bag 3 whose upper side opens, thereby forming a top seal portion 36 (FIG. 3 ( A) and (B)).
On the other hand, the outer bag 5 in which the side seal portions 55 and 55 are folded back is prepared, the inner bag 3 to which the plug portion 9 is attached is stored in the outer bag 5, and the top seal portion 36 of the inner bag 3 is sandwiched Then, the upper opening of the outer bag 5 is heat sealed to form a top seal portion 57 (FIG. 3C).
The self-standing pouch 1 </ b> A in the planar form shown in FIG. 3C is a shipping form.
The self-standing pouch 1A is filled with the contents and the gas, for example, in the same manner as the top seal portion 36 of the inner bag 3 and the top seal portion 57 of the outer bag 5 as shown by a two-dot chain line in FIG. The unsealed portions 36a and 57a are provided, the contents are filled from the unsealed portion 36a of the inner bag 3, the gas is filled from the unsealed portions 57a of the outer bag 5, and then heat sealed. The outer bag 5 swells due to the bulge of the inner bag 3 due to the pressure of the contents W and the gas filled in the sealed space 7, and becomes a self-supporting form.

The width dimension L3 of the inner bag 3 is shorter than the width dimension L5 of the outer bag 5 by a predetermined dimension. In this example, it is 20 mm or shorter. If it is smaller than 20 mm, the gas sufficient to make the pouch self-supporting does not go around the entire circumference of the sealed space 7. On the other hand, if the length is shortened, the inner volume of the inner bag is reduced, and therefore, about 20 mm to 60 mm is preferable. The width between the front end of the folded side seal portion 55 and the bent portion 54 is set to 7.5 mm × 2, the portion of the gas filling port unsealed portion 57 a is 5 mm, and is set to about 20 mm in total.
Moreover, the vertical dimension of the inner bag 3 is shorter than the vertical dimension of the outer bag 5 by 10 mm or more, and the internal capacity is increased as much as possible. That is, it is possible to approach up to about 10 mm, and if it is smaller than that, it becomes difficult for the gas to enter the entire sealed space 7.
Furthermore, the folding width L6 of the bottom film 53 of the outer bag 5 is preferably 30 mm or more. The bottom film 53 opens when the gas is sealed, and the folding width L6 corresponds to the ground contact area of the bottom, and the self-supporting becomes unstable when it is smaller than 30 mm.
In the folded state of the empty pouch, the lower end of the inner bag 3 may be lower than the folded end of the bottom film 53, and the internal capacity can be made as large as possible.

Next, a method for dispensing the contents of the self-standing pouch will be described.
When the content W is to be poured out, the screw cap 95 of the plug portion 9 is removed, and the outer bag 5 is pushed as shown in FIG. Then, the internal pressure of the inner bag 3 rises, but until the predetermined pressure is reached, the discharge opening 93d is closed by the valve portion 94b of the check valve 94 (see FIG. 6A), and the differential pressure is predetermined. When the pressure is reached, the valve portion 94b of the check valve 94 is separated from the seat surface, the spout is opened, and the contents are poured out (see FIG. 6B).
When the force for pushing the outer bag 5 is further increased, not only the valve portion 94b of the check valve 94 but also the elastic piece 94g of the valve mounting portion 93e is bent, and the dispensing opening 93d is greatly opened to increase the amount of dispensing (FIG. 6 (C)).

When the pressing of the outer bag 5 is stopped, the check valve 94 is closed and the dispensing of the contents W is stopped. Therefore, air does not flow into the inner bag 3 and the content W is prevented from being oxidized. Further, by using an inert gas as the gas, an effect of delaying oxygen penetration into the contents can be expected, and the storage stability of the contents can be improved.
As the contents W are consumed, the volume of the inner bag 3 decreases, and as shown in FIG. 5 (B), the outer bag 5 contracts accordingly, but the amount of gas is such that the bottom film 53 is opened. Since the amount is filled, the three-dimensional shape of the outer bag 5 is maintained. Further, since the side seal portions 55, 55 of the outer bag 5 are folded back, the self-supporting property can be further improved in combination with the maintenance of the three-dimensional shape by the gas, and the standing shape of the pouch can be improved when the contents are reduced.

Further, when the hand is gripped by hand during use, the edges of the side seal portions 55 and 55 do not touch the hand, and the smooth bent portions 54 and 54 touch the hand, so that the usability is improved.
After the contents are emptied, if the gas is removed, it returns to a flat form and is not bulky and can be easily disposed of.
Thus, according to the self-standing pouch of the present invention, the cap 9 is provided in the inner bag 3 and the gas is sealed in the sealed space 7 between the inner bag 3 and the outer bag 5, so the content is reduced. Even so, the three-dimensional shape of the outer bag 5 is maintained by the gas pressure, the contents W can be dispensed, and the independence can be maintained until the use is completed.

[Embodiment 2]
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the first embodiment, the screw cap 95 is used as the cap of the plug portion 9, but the hinge cap 295 is used in the plug portion 29 of the second embodiment. Since the parts other than the plug portion 29 are the same as those in the first embodiment, the following description will mainly describe differences from the first embodiment, and the other components will be denoted by the same reference numerals as those in the first embodiment. A description will be omitted.

As shown in FIG. 7, the spout portion 29 includes a spout 293 and a hinge cap 295 that opens and closes the spout 293.
The spout 293 has a boat-shaped mounting portion 293a sandwiched between the top seal portions 36 of the inner bag 3 and a mouth and neck portion 293b extending outward from the mounting portion 293a. On the outer periphery of the mouth-and-neck portion 293b, an engagement projection 293k projecting annularly on the tip side and a neck ring 293i projecting in a flange shape projecting on the base side are provided.
As shown in an enlarged view in FIG. 7B, the hinge cap 295 includes a cap main body 296 attached to the mouth / neck portion 293b and a lid rotatably connected to the cap main body 296 via the hinge portion 297. And a body 298. The cap body 296 includes an annular top plate portion 296a that contacts the tip of the mouth and neck portion 293b of the spout 293, and an outer cylinder portion that hangs downward from the outer end portion of the top plate portion 296a and fits to the outer periphery of the mouth and neck portion 293b. An inward projection 296c is provided on the inner periphery of the lower end portion of the outer cylinder portion 296b so as to get over the engagement projection 293k of the mouth neck portion 293b.

  A cylindrical pouring tube 296d protrudes upward from the annular top plate portion 296a of the cap body 296, and the bottom of the pouring tube 296d has a flow of the mouth and neck portion 293b of the spout 293. A valve seat 93h is provided so as to shield the passage, and a discharge opening 93d that penetrates the valve seat 93h and a check valve 94 that opens and closes the discharge opening 93d are provided in the valve seat 93h. . The structure in which the check valve 94 opens and closes the dispensing opening 93d is the same as that in the first embodiment. The lid 298 is provided with a pressing member 298a that presses the check valve 94 when closed.

Next, the filling process will be described with reference to FIG.
In the second embodiment, the empty pouch 1A before filling is shipped with the hinge cap 295 not attached as shown in FIG. 8 (A).
In the filling process, the filling nozzle 130 is inserted into the empty pouch 1A from the mouth / neck portion 293b of the spout 293 to fill the contents, and the unsealed portion 57a of the top seal portion 57 is filled into the sealed space 7 through the gas nozzle 140. Gas is enclosed.
Thereafter, the unsealed 57a is sealed (see FIG. 8B), and the hinge cap 295 is plugged into the spout 293, whereby the self-standing pouch 1 is completed (see FIG. 8C).

When the hinge cap 295 is plugged into the spout 293, the neck ring 293i is supported by the support plate 110, the hinge cap 295 is gripped by the chuck 120, and the outer cylinder portion 296b is fitted into the mouth neck portion 293b and pushed in. Thus, the inward projection 296c of the hinge cap 295 climbs over the engagement projection 293k of the mouth and neck portion 293b, and the hinge cap 295 is fixed.
The hinge cap 295 is larger than the screw cap. However, if the hinge cap 295 is removed in an empty pouch state as in the present embodiment, space efficiency is improved, and the mouth and neck portion 293b of the spout 293 is used as a filling port. Since it can be used, it is not necessary to provide an unsealed portion for filling in the top seal portion. Further, the hinge cap 295 can be attached by simply plugging it by providing the neck ring 293i.

  When the contents W are to be poured out, the lid 298 of the hinge cap 295 is opened and the outer bag 5 is pushed for use. The operation of the check valve is the same as in the first embodiment. After use, the lid 298 is closed and resealed. Since it can be opened and closed with a single touch, it is effective for applications that are frequently used repeatedly.

In each of the above embodiments, gas is exemplified as the fluid filled in the sealed space between the outer bag and the inner bag. However, the fluid is not limited to gas, and may be liquid or fluid viscosity. It may be a solid body, a mixture of gas and liquid, or a solid dispersed in the liquid, and in short, any fluid material may be used.
Further, in the above-described embodiments, the fluid is filled into the sealed space from the unsealed portion 57a of the top seal portion 57. However, the present invention is not limited to this, and the seal portion other than the top seal portion may be filled. An unsealed portion for filling may be provided, a hole for filling may be provided on the film surface, and sealing may be performed after filling, and various methods can be employed.
Furthermore, although the case where the plug portion has the check valve has been described in the above-described embodiment, any configuration may be used as long as the plug portion can reseal, and the check valve is not necessarily required.
In the above embodiment, a so-called standing pouch has been described as an example of a self-supporting outer bag. However, the pouch is not limited to a standing pouch, and has a side seal portion such as a gusset bag and can stand on its bottom. Any pouch can be used. The inner bag has been described by taking a four-side seal as an example, but various types of pouches such as a three-side seal can be applied.

DESCRIPTION OF SYMBOLS 1 Self-supporting pouch 3 Inner bag 31, 32 Film 33, 34 Side seal part 35 Bottom seal 36 Top seal part 36a Unsealed part 5 Outer bag 51 Front film 52 Rear film 53 Bottom film 54 Bending part 55 Side seal part 56 Bottom seal Portion 57 top seal portion 57a unsealed portion 58 notched portion 7 sealed space 9 plug portion 93 spout 93a mounting portion 93b mouth neck portion 93c partition wall 93d outlet opening 93e valve mounting portion 93f engagement hole 93g elastic piece 93h valve seat portion 94 Check valve 94a Mounting portion 94b Valve portion 95 Screw cap 95a Holding member
L3 Width dimension of inner bag 3 L5 Width dimension of outer bag 5 Port plug portion 293 Spout 293a Mounting portion, 293b Neck ring, 293i Neck ring, 293k Engagement projection 295 Hinge cap 296 Cap body 296a Top plate portion, 296b Outside Tube part, 296c Inward projection, 296d Extraction cylinder 297 Hinge part 298 Lid

Claims (7)

An inner bag made of a synthetic resin film filled with a fluid content, and an outer bag made of a synthetic resin film that has a side seal portion and can be self-supporting at the bottom, and stores the inner bag;
In a self-supporting pouch in which a sealed space in which a fluid is sealed is formed between the inner bag and the outer bag, and the three-dimensional shape of the outer bag is maintained by the fluid pressure sealed in the sealed space,
The inner bag is attached with a resealable plug part,
The self-standing pouch characterized in that the side seal part of the outer bag is folded back through a bent part.   The self-standing pouch according to claim 1, wherein the plug portion includes a check valve.   The self-standing pouch according to claim 1 or 2, wherein the fluid is an inert gas.   The self-standing pouch according to any one of claims 1 to 3, wherein a width dimension of the inner bag is 20 mm or more shorter than a width dimension of the outer bag.   The self-standing pouch according to any one of claims 1 to 4, wherein a vertical dimension of the inner bag is 10 mm or more shorter than a vertical dimension of the outer bag.   The self-standing pouch according to any one of claims 1 to 5, wherein the outer bag is a standing pouch provided with a bottom film.   The self-standing pouch according to claim 6, wherein the folding width of the bottom film is 30 mm or more.

Images