JP5131642B2 - Pouch container - Google Patents

Description

【Technical field】
[0001]
The present invention relates to a pouch container.
[Background]
[0002]
Pouch containers are deformable bag-like soft containers, and are often produced and used together with hard containers such as bottles as containers for storing liquid contents.
The pouch container has a body part having a space for filling contents by side-sealing the front piece and the back piece made of a flexible film-like material at the edge, and in other types of pouch containers In addition, the bottom part is folded into two bottom pieces, sandwiched between the front piece and the back piece, and heat-sealed at the edge portion to form a standable pouch having a self-supporting standing pouch.
A pouch container constructed in this way generally contains contents such as liquids, such as detergents, bleaches, softeners, laundry glue, shampoos, rinses, or edible oils, soy sauce, sauces, dressings, drinking water and the like.
The following problems have been pointed out in this pouch container.
First, when the pouch container is configured as a standing pouch, the standing pouch is filled with contents such as liquid, and is displayed at a storefront in a standing state with the bottom facing down. The back piece is made of a highly flexible material in the form of a film, so the pouch container itself has low rigidity, it is difficult to maintain its posture when standing, the standing posture is distorted, and the head hangs down in the display state. Sometimes.
Next, since the side seal part at the periphery of the pouch container is heated at the time of sealing, the hardness is extremely high in the cooled and solidified state, and since this side seal part is cut in the manufacturing process, a sharp edge is formed, The touch of the pouch can be sharp and uncomfortable, and it can hurt your palm.
Furthermore, when the pouch container is used as a refill container for the content liquid with respect to the empty container, the pouch container may be provided with a nozzle that can be inserted into the mouth of the empty container to facilitate the refilling operation. Since the above-mentioned hard side seal part is stretched, it is difficult to insert into the mouth part of the empty container, and the nozzle diameter of the liquid passage in the nozzle must be reduced by design. The flow rate of the liquid drops, and it takes time to inject the content liquid.
When inserting the nozzle of the pouch container into the mouth of the empty container, it is conceivable to bend the side seal part so as not to obstruct the insertion, but since the side seal part is hard as described above, the user can It is almost impossible to bend.
Of the above problems, the lack of rigidity of the pouch has been devised.
[Patent Document 1]
Japanese Patent Laid-Open No. 11-193038
[Patent Document 2]
JP 2000-142720 A
[Patent Document 3]
JP 2003-72770 A
[Patent Document 4]
JP 2004-035018 A
[Patent Document 5]
JP 2005-313994 A
[0003]
In the technique of Patent Document 1, ribs 19 are formed over the entire length of the side seal 15 of the pouch container, thereby improving the self-supporting property. However, a sharp solid edge is exposed on the side seal, The problem of nozzles inserted into the mouth of the container remains unresolved.
The technique of patent document 2 forms the cylindrical vertical rib in the edge of a side seal part, and gave the self-supporting property and buckling resistance of the flexible packaging container.
This technique solves the problems of the rigidity of the container and the sharp edge of the side seal. However, in this technique, the width of the side seal must be increased in order to form the rib. The rib is not formed by using a soft pouch material but is formed by using a hard side seal portion. Therefore, a hard feeling is given to the user, and processing is also difficult.
In the technique of Patent Document 3, the side seal portion is provided with a bent portion having a cross-sectional shape of L shape, V shape, UV shape, convex shape or the like. Although this technique can give rigidity to the pouch container, the problem that the sharp edge is exposed on the side seal and the problem of the nozzle inserted into the mouth of the empty container remain unsolved.
The technique of Patent Document 4 has the effect of curling the side seal portion in the width direction and improving the self-supporting stability, but as with Patent Document 2, the problems of container rigidity and sharp edges are solved, but the feel is hard, There are problems such as difficult processing.
Patent Document 5 discloses a branching standing pouch. This branching standing pouch is provided with a dispensing nozzle branched from the center of the upper end of the pouch, and is refilled by holding the side seals on both sides of the pouch. For this reason, a configuration is particularly desired in which the hard edge of the side seal portion does not hit the fingers and cause discomfort to the user.
DISCLOSURE OF THE INVENTION
[Problems to be solved by the invention]
[0004]
This invention has been made in view of the above circumstances,
The hard and sharp edge of the heat seal part at the edge of the pouch container is not exposed to the outside, and the soft edge appears at the edge of the pouch container, giving the user a comfortable feeling of use. In addition, when a nozzle is provided in the pouch container, a pouch container is provided in which the side seal portion at the nozzle edge does not obstruct the insertion of the nozzle into the mouth of the empty container. It is the purpose.
[Means for Solving the Problems]
[0005]
Corresponding to this object, the pouch container of the present invention has a space for sealing the pouch material made of a flexible film material at the edge of the pouch material and filling the contents between the pouch materials. In the pouch container to be formed, a folded portion is formed by folding back the pouch material in the space immediately adjacent to the seal portion along at least a part of the seal portion, and the folded portion is at least a corner portion of the pouch container. It is characterized by being formed excluding a part.
【Effect of the invention】
[0006]
According to the first aspect of the present invention, the side seal part is folded and overlapped with the pouch container body part, and the pouch container body part and the side seal part are in a three-dimensional three-dimensional arrangement relationship. The bending rigidity of the whole of the pouch container body and the side seal portion is increased, and the rigidity against buckling is increased.
In addition, the fold of the folded portion is closer to the pouch container body than the boundary between the pouch container body and the side seal part, and as a result, a soft bent edge of the body appears on the edge of the pouch container. As a result, the feel of the palm of the operator holding the pouch container is softened, and the edge of the palm of the operator is not damaged.
Similarly, since the bent edge of the body can be freely deformed, even when the nozzle part of the pouch container is inserted into the mouth part of the empty container, the side seal part is retracted to an angle that does not interfere with the insertion. Can be increased in diameter, the flow rate can be increased, and the time required for refilling can be shortened.
Further, since the end of the fold of the folded portion does not appear on the outer periphery of the pouch, it is not necessary to perform a new rounding process of the angle, and the formation of the pouch container is easy.
According to the invention described in claim 2, it can be applied to a typical standing pouch container having the most general configuration, and the application range can be widened.
According to the third aspect of the present invention, the side seal portion may be folded back in any direction on the front side or the back side of the pouch container. As a result, the appearance design of the pouch container becomes an obstacle. It is possible to realize the folding without.
According to the invention described in claim 4, since the folding direction of the seals on both sides of the pouch container may be the same or in the opposite direction, a degree of freedom can be given to the design design of the pouch container.
According to the invention described in claim 5, the rigidity of the nozzle can be improved, and the side seal that is stretched when the nozzle is inserted into the mouth of the empty container is folded back so as not to get in the way. Therefore, the diameter of the liquid passage in the nozzle can be designed large, and the content liquid pouring performance can be improved.
According to the invention described in claim 6, it is possible to improve the feeling of use of the branched pouch that is gripped so as to sandwich both side seal portions.
According to the seventh aspect of the present invention, the ribs are partially uneven in the thickness of the pouch before filling, and the posture of the pouch is deteriorated when the pouches are stacked. The portion eliminates a deviation in the thickness of the pouch container and gives uniformity, and the handling property of the pouch container can be improved.
According to the eighth aspect of the present invention, since the folded portion does not reach the planned opening position of the dispensing nozzle, the folded portion does not obstruct the opening of the planned opening position of the dispensing nozzle.
According to the invention described in claim 9, since the folded portion is fixed to the surface of the pouch container and does not float, the user's palm does not contact the edge portion of the hard side seal. There is no hard discomfort. Also, the handling of the pouch container is easy in the filling machine for the contents.
According to the invention described in claim 10, since the folded portion is formed to avoid the unsealed portion for filling the contents of the pouch container, it is caused by the obstruction of the seal after filling the contents of the unsealed portion. Absent.
According to the eleventh aspect of the present invention, since the folded portion is formed in the other portion except the bottom portion where the pouch material is stacked in multiple layers, the folding operation and the formation of the pouch container are easy.
According to the twelfth aspect of the present invention, since the width of the upper and lower portions of the pouch container is smaller than the width of the body portion, the folding portion is not fixed for filling the contents of the upper and lower portions of the pouch container. It is possible to process only the pouch container body without affecting the seal portion and the bottom, and the folded portion can be easily molded and fixed.
According to the invention described in claim 13, not only the touch to the pouch becomes soft, but also the gripping property is improved.
[Brief description of the drawings]
[0007]
FIG. 1 is a front view of a pouch container.
2 is a cross-sectional explanatory view taken along a line AA in FIG.
FIG. 3 is a cross-sectional explanatory view of another pouch container.
FIG. 4 is an explanatory front view showing a state in which the dispensing nozzle is inserted into the mouth of the empty container.
FIG. 5 is an explanatory view of a horizontal and vertical cross section showing a state in which a dispensing nozzle is inserted into the mouth of an empty container.
FIG. 6 is a cross sectional explanatory view showing a fixed state of the folded portion.
FIG. 7 is a cross-sectional explanatory view showing a fixed state of another folded portion.
FIG. 8 is a cross sectional explanatory view showing a fixed state of another folded portion.
FIG. 9 is a partial view showing a folded portion of a pouring nozzle portion of a pouch container.
FIG. 10 is a development explanatory view of a pouch container according to another embodiment.
FIG. 11 is an explanatory front view of a pouch container according to another embodiment.
FIG. 12 is a view showing a branched standing pouch according to another embodiment, and is a front view showing a state in which the nozzle is bent downward;
FIG. 13 is a front view showing a state in which a nozzle of a branched standing pouch according to another embodiment is raised.
FIG. 14 is an explanatory front view showing a standing pouch having a recessed holding recess.
[Explanation of symbols]
[0008]
1a, 1b, 1c, 1d, 1e, 1f pouch container
2 Front piece
3 Back piece
4 Bottom piece
5 Right side seal
6 Left side seal
7 trunk
8 Bottom seal
10 voids
11 Bottom
12 Upper edge
13 Outlet nozzle
14 Liquid passage
15 cylinder
16 Seal part
17 Sealing part
18 outlet
19 border
21 tabs
22 Easy opening line
23 Break
24 Fold
25 Ribs
26 Folding part
29 Single-sided adhesive tape
31 empty bottles
32 mouth
33 Planned seal after filling
34 Rounded parts
35 Bottom edge
51 Branching Standing Pouch
52 Torso
53 Nozzle
55 Gripping recess
56 Virtual line at the edge before turning
BEST MODE FOR CARRYING OUT THE INVENTION
[0009]
The details of the present invention will be described below with reference to the drawings.
1 and 2, reference numeral 1a denotes a pouch container. The pouch container 1a is composed of three pieces: a front piece 2, a back piece 3, and a bottom piece 4. Each face piece is made of a flexible film material, the front piece 2 and the back piece 3 are positioned opposite to each other, heat sealed at both the left and right edges to form side seals 5 and 6, and the pouch A bottom piece 4 formed between the front piece 2 and the back piece 3 is sandwiched between the front piece 2 and the back piece 3 at a portion corresponding to the bottom of the pouch container at the lower end of the trunk portion 7, and the peripheral portion of the bottom piece 4. Is heat-sealed with the front piece 2 and the back piece 3 to form the bottom seal 8 to form the bottom 11 of the pouch container. The body 7 constitutes a void 10 surrounded by the front and back double-sided pieces 2 and 3 and the bottom piece 4, and the void 10 is filled with the contents later. Therefore, when the contents are not filled, the upper edge 12 of the front piece 2 and the back piece 3 is an unsealed portion that is not sealed. is there.
A pouring nozzle portion 13 is formed in a corner portion (upper left corner in the case of FIG. 1) of the upper end portion of the pouch container 1a.
The dispensing nozzle portion 13 is formed by using two body members, that is, the front piece 2 and the back piece 3. The dispensing nozzle portion 13 includes a cylindrical portion 15 that partitions the liquid passage 14 and heat seal portions 16 and 17 on both sides of the cylindrical portion 15. The base end portion of the liquid passage 14 communicates with the space 10 of the body portion 7, and the spout 18 at the upper end portion is closed with a tab 21. An easy-open line 22 is formed on the front piece 2 and the back piece 3 between the tab 21 and the spout 18. In addition, ribs 25 are formed on the front piece 2 and the back piece 3 so as to protrude outwardly to maintain the conduction of the content passage. Such a rib shape may be projected outward, recessed inward, or a combination of both.
Particularly importantly, the right side seal 5 and the left side seal 6 are formed by heat sealing, and then the front piece 2 or the back piece 3 corresponding to the unsealed space 10 closer to the center than the fold 23 described later. It is folded to overlap. Further, in the pouring nozzle 13 as necessary, the heat seals 16 and 17 are folded back toward the front piece 2 or the back piece 3 corresponding to the liquid passage 14. Of the bottom seal 8, portions overlapping the left and right side seals 5, 6 are similarly folded back so as to overlap the front piece 2 or the back piece 3. The folded fold 23 is formed along the heat seals 5 and 6 in the immediate vicinity of the side seals 5 and 6. The crease 23 is located along the entire length of the heat seals 5 and 6, or a part or extension of the heat seals 5 and 6, but is slightly closer to the space 10 side than the boundary 19 between the space 10 and the heat seals 5 and 6. To position. Accordingly, the folded portion 26 to be folded is composed of the unsealed void portion adjacent to the side seal outside the fold 23 and the side seal. The folding direction of the side seals 5 and 6 at the fold 23 is the same direction as shown in FIG. 2, that is, the direction overlapping the front piece 2 or the back piece 3, or the opposite direction as shown in FIG. The direction in which the front piece 2 and the back piece 3 overlap with different body materials may be used. In the case of a general standing pouch, the intersection of the bottom seal inner edge and the side seal inner edge is made to coincide with the upper end of the bottom piece. This point is a point where stress concentrates when a drop impact is applied to the pouch, and the bag easily breaks when the intersection of the seals deviates greatly.
In the present invention, since there is a fold 23 inside the side seal inner edge (border 19), there is an effect of relaxing stress concentration at the seal intersection, and good drop resistance is obtained. Further, it is preferable that the intersection between the inner edge of the bottom seal and the crease 23 coincides with the upper end of the bottom piece 4 because the bottom strength is further improved. In the folding forming method, in the well-known bag making process of the pouch container, after the side seal portion is formed, the pouch container is folded for each pouch container by the cutter in the separating process using the separated mold. In the case where the pouch container is provided with the pouring nozzle portion 13, the folding is also performed on the liquid passage 14 side closest to the seal portions 16, 17 at the fold 24 even in the vicinity of the pouring nozzle portion 13. In some cases, there is a portion where the crease line becomes a curve in the vicinity of the pouring nozzle, so it is necessary to heat the mold to heat and soften the folded portion. The operation of the pouch container 1 configured as described above is as follows.
In the filling plant, the contents are filled from the post-filling seal planned portion 33 that forms the inlet of the upper edge 12 in the filling factory, and the post-fill seal planned portion 33 is sealed, and the pouch container 1 manufactured in the bag making process is sealed. Container filling is completed. When filling the contents, the bottom piece 4 in a folded state is opened prior to filling, but the conventional pouch may be difficult to open because the film is in close contact. The pouch of the present invention has the effect of shifting the film with which the front and back are in close contact by folding back in a space near the side seal, and the bottom piece 4 is easy to open. When the pouch container is displayed in an upright state at the store, the trunk 7 and the left and right side seals 5 and 6 that overlap with the trunk 7 act as ribs to increase the rigidity of the pouch container and erect the pouch container 1. Keep in state. In the prior arts listed in the patent literature, additional work is performed on the hard side seal portion to improve the self-supporting property, so that the space near the side seal portion is difficult to open, and the volumetric efficiency (capacity that can be filled with respect to the surface area) is reduced.
In the present invention, since the crease 23 is soft and easy to open, the cross-section of the pouch can be expanded to a shape close to a circle, and the volumetric efficiency is good. Moreover, it becomes easy to grasp from either direction by rounding.
When the content liquid in the pouch container is poured out as in the case of refilling into an empty bottle, if the tab 21 is grasped and cut out from the dispensing nozzle portion 13 by the easy-opening wire 22, the spout 18 opens to open the content liquid. Can be dispensed. When the folded back of the side seals 5 and 6 also overlaps with the tabs 21, the thickness of the tabs 21 and the side seals 5 and 6 is increased, and the rigidity of the tabs 21 is increased, so that the gripping and cutting operations are facilitated. .
Next, as shown in FIG. 4, the pouring nozzle portion 13 is inserted into the mouth portion 32 of the empty bottle 31, and the content liquid is injected into the empty bottle. As shown in FIG. 5, the seal portions 16 and 17 of the pouch container pour nozzle portion 13 are folded from the fold 23 so as not to obstruct insertion as shown in FIG. Therefore, the dispensing nozzle part 13 can be sufficiently inserted into the mouth part 32 of the empty bottle 31. Furthermore, since the pouring nozzle part 13 can be made as thick as the diameter of the mouth part 32, the injection time can be shortened. Moreover, the soft crease 23 stabilizes a contact state with the opening part 32 of the empty bottle 31, and supports a pouch container stably.
When performing this injection operation, the operator grasps the pouch container 1 with the palm, and the side edge of the pouch container 1 hits the palm at that time, but the right side seal is placed on the side edge of the pouch container 1. 5. Since the left side seal 6 does not protrude but the fold 23 of the front piece 2 or the back piece 3 which is a flexible soft body material appears, the pouch container 1 itself has the right side seal 5 Even though the left side seal 6 has rigidity, the touching touch provides a very soft feeling. As described above, according to the present invention, the hard sharp edge portion of the heat seal portion at the edge portion of the pouch container is not exposed to the outside, and the soft edge portion appears at the edge portion of the pouch. When the nozzle is provided in the pouch container, the side seal part at the nozzle edge does not obstruct the insertion of the nozzle into the mouth of the empty container. A pouch container can be obtained.
Moreover, there is no restriction | limiting in particular as a flexible film material used for the pouch container 1. FIG. Examples of resin materials suitable for constituting the film material include crystalline polypropylene, crystalline propylene-ethylene copolymer, crystalline polybutene-1, crystalline polybutene 4-methylpentene-1, low density polyethylene, medium density -Polyolefins such as polyethylene or high-density polyethylene, ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), ion-crosslinked olefin copolymer (ionomer); polystyrene, styrene-butadiene Aromatic vinyl copolymers such as copolymers; Halogenated vinyl polymers such as polyvinyl chloride and vinylidene chloride resins; Nitrile polymers such as acrylonitrile-styrene copolymers, acrylonitrile-styrene-butadiene copolymers; Nylon 6 , Nylon 66, para or me Such polyamides xylylene adipamide, polyethylene terephthalate, polyesters polytetramethylene terephthalate; various polycarbonates; may be mentioned thermoplastic resins such as polyacetal such as polyoxymethylene or the like. In addition to these thermoplastic resins, paper may be used. Film materials made of these materials are used after being unstretched, uniaxially stretched, or biaxially stretched.
Furthermore, the film material used for the pouch container 1 can be constituted by laminating these film materials in a single layer, or by laminating two or more kinds, and one kind or two kinds or more of these film materials. Further, a metal foil such as aluminum, a vapor deposition film of metal or metal oxide, paper, cellophane, or the like can be bonded together. Preferred film materials include, for example, a stretched nylon film as an outer layer, a two-layer structure having a polyolefin film such as low density polyethylene and polypropylene as an inner layer, a stretched polyester film as an outer layer, and a two-layer structure having a polyolefin film as an inner layer, and Among these, a film having a three-layer structure in which a metal foil such as aluminum is laminated between outer layer films, and the like are included. In the production of these laminated films, an adhesive and an anchor agent are interposed between the respective layers as necessary. You can also.
And the layer structure of the said film material is selected according to the property of the content with which the pouch container 1 is filled, for example, when low cost is requested | required like a pouch container for refill detergents, it is a two-layer structure. When a laminated film is used and storage stability is required like a seasoning pouch container, a laminated film having a three-layer structure or more including an aluminum foil may be used. Even in applications where the contents are sterilized by retort such as foods and beverages, the pouch of the present invention can be used without problems.
In order to maintain the posture in which the folded portion 26 folded back at the fold line 23 overlaps the front piece 2 and the back piece 3 of the space 10 inside the fold line 23, the fold line 23 is processed as described above. In this case, the plastic deformation of the pouch material is used, but without using the plastic deformation or in addition to using the plastic deformation, the folded portion 26 is fixed to the overlapping front piece 2 and back piece 3. The posture of the folded portion 26 may be maintained.
In the embodiment shown in FIGS. 6 to 8, the folded portion 26 of the pouch container is overlapped with the front piece 2 or the back piece 3 of the space 10 closer to the center than the fold 23, and further fixed to the front piece 2 or the back piece 3. It is a thing.
The pouch container 1b of the embodiment shown in FIG. 6 is fixed to the front piece 2 or the back piece 3 of the space 10 closer to the center than the fold 23 over the entire area of the folded portion 26 facing the front piece 2 or the back piece 3. Embodiment.
The pouch container 1c of the embodiment shown in FIG. 7 has the front piece 2 or the back piece 3 of the space 10 closer to the center than the fold 23 on the entire surface of the seal portion 16 facing the front piece 2 or the back piece 3 of the folded portion 26. It is fixed to. As a technique for fixing the folded portion 26, ultrasonic welding, adhesion with an adhesive, adhesion with a double-sided adhesive tape, adhesion with a single-sided adhesive tape, or the like can be employed.
The pouch container 1d of the embodiment shown in FIG. 8 uses a single-sided adhesive tape 29, and the center of the folded portion 26 from above the folded portion 23 with the single-sided adhesive tape 29 covering the outer edge of the seal portion 16 of the folded portion 26. This is an embodiment fixed to the surface of the front piece 2 or the back piece 3 of the near void 10.
When the folded portion 26 is fixed to the surface of the pouch container in this way, the folded portion 26 does not float from the surface of the pouch container, so that the user's palm may come into contact with the edge portion of the hard side seal. Since there is no, it does not give a hard discomfort to the user. Further, in the content filling device, the pouches are supplied one by one from the stacked state. However, if the folded portion is fixed, there is no possibility that the pouches will be caught, and the handling of the pouch container becomes easy. As shown in FIG. 9 b, as a result of the side seal portions 5, 6 being folded back at the fold 23, the side seal portions 5, 6 folded back toward the inside are the tabs 21 at the tip of the dispensing nozzle portion 13. Since it may become an obstacle when the tab 21 is cut off at the easy opening line 22 by overlapping with the easy opening line 22 between them, in this case, it is easy to fold the lower end shape of the side seal portions 5 and 6. It is necessary to retreat into a shape that does not overlap with the opening line 22. For example, as shown in FIG. 9 (a), when the easy-open line 22 is formed downwardly to the right, the shape of the lower edge 35 of the side seal portion 5 is formed to be downwardly downward before turning. Then, after the folding, the lower edge 35 of the side seal portion 5 is descended to the right parallel to the direction of the easy-open line 22, so that the easy-open line 22 is not obstructed. In particular, if the end edge of the folded portion and the easy opening line 22 are substantially coincident, the opening direction is guided by the end edge, and the opening force is concentrated on the easy opening line 22 along the edge. So it can be opened with lighter force.
10 and 11 show a pouch container 1e according to still another embodiment of the present invention.
In the pouch container 1e according to the other embodiment, the folded portion 26 is not formed along the entire formation region of the side seal portion, but is formed on the unsealed portion for filling the contents of the pouch container or the bottom portion of the pouch container. Does not form the folded portion 26, but forms the folded portion 26 only in other portions. That is, as shown in FIG. 10, the pouch container 1e is composed of three pieces of a front piece 2, a back piece 3, and a bottom piece 4, and the front piece 2 and the back piece 3 are positioned to face each other, and side seals are formed on both left and right edges. And a bottom piece 4 that is folded in half between the front piece 2 and the back piece 3 at a portion corresponding to the bottom of the pouch container 1e at the lower end of the barrel 7. The pouch container according to the first embodiment is that the bottom part 4 is sandwiched between the front piece 2 and the back piece 3 to form the bottom seal 8 to form the bottom part 11 of the pouch container. Same as 1a, but this pouch container 1e has a post-fill scheduled seal portion 33, a trunk portion 7 and a bottom portion 11 which are unsealed portions for filling the contents in order from the top in the vertical direction of the pouch container. It hangs down in the vertical direction of the rear seal planned part 33, the body part 7 and the bottom part 11. The width is not the same, and the post-filling seal portion 33 and the bottom portion 11 are configured to be smaller than the body portion 7, and the fold line 23 for forming the folded portion 26 is formed in the body portion 7 in the vertical direction. In addition, the crease 23 has a shape that does not cover the planned sealing portion 33 and the bottom portion 11 after filling.
In other words, the folded portion is formed in the body portion 7, but is not formed in the post-filling scheduled seal portion 33 and the bottom portion 11.
Normally, the four corners of the pouch are rounded into an R shape so as not to be sharp (reference numeral 34 in FIG. 11). If the wrapping has reached the part to be sealed and the bottom after filling, even if the four corners of the original pouch are rounded, new sharp corners will appear due to the wrapping. Cut off again later.
If the folded portion is not formed at the planned seal portion or the bottom portion after filling, the four corners of the original pouch remain as they are, so that the above alignment and additional processing are not necessary.
As for the part to be sealed after filling, when sealing after filling, if there are folded parts on both side edges, the side edges will seal 4 and the center part will have non-uniform thickness, and the sealing pressure will be uniform However, if a folded portion is not provided, it can be sealed as before.
Since sealing after filling is performed by a filler, it is important that a conventional apparatus can be used.
Moreover, about the bottom part, the bottom part which pinched | interposed the bottom material has piled up four sheets, and if it folds back including this part, the difference of the thickness with the folding | returning part above a bottom part will be large, and its appearance is bad. Moreover, although it becomes difficult to attach a crease, in the pouch container 1e of this invention, it is improved rather than those points. 12 and 13 show a pouch container 1f according to still another embodiment of the present invention. A pouch container 1f according to another embodiment is an application of the present invention to a branched standing pouch. This branched standing pouch 51 has an upper end portion of a body portion 52 that branches into a content filling port and a nozzle 53, and a nozzle 52 is provided at the center of the upper end portion of the pouch as shown in FIG. When the part 53 is changed from the collapsed state shown in FIG. 12 to the raised state shown in FIG.
In order to prevent the hard side seal portion from hitting the fingers when the nozzle portion 53 is started up and causing discomfort to the user, the nozzle portion 53 is bent from the space inside the side seal portion to the body side. In this embodiment, the radius of the rounded shape at the corner of the base is made larger than usual, and the end of the crease 23 comes in the middle to avoid the appearance of sharp edges on the outer periphery of the pouch container.
In the pouch container of the embodiment illustrated in FIG. 14, the folded portion forms a holding recess. In this example, for a rectangular pouch container with a pouring spout on the upper edge, a folded portion is formed only in a part of the height direction, leaving a portion that is not folded up and down, so that the imaginary portion of the edge before folding is formed. A holding recess 55 that is recessed inward of the line 56 is formed. As another method for forming the gripping concave portion 55, the folded portion may be formed in the entire height direction, and the gripping concave portion may be formed by increasing a part of the folded width. The side edge of the pouch container before being formed may be a curved line that is recessed inward, and the whole or a section of the curved line may be folded back with the same width to form the holding recess.
If it does in this way, while being able to give a soft touch to a fingertip by a folding | returning part, a pouch container can be stably hold | maintained because a finger | toe hits the recessed part for holding | grip.
Although the present invention has been described with reference to the preferred embodiment, it is needless to say that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. .

Claims (13)

In a pouch container that forms a void for filling contents between the pouch materials by sealing at a seal portion at the edge of the pouch material made of a flexible film material, along at least a part of the seal portion Ri Na to form a folded portion folded pouch material nearest the cavity of the sealing portion Te, the folded portion may be formed by removing at least a portion of the corner portion of the pouch container Pouch container   The pouch material has two body members disposed opposite to each other and a bottom member sandwiched between the two body members, and the folded portion is formed on the body member. The pouch container according to claim 1   2. The pouch container according to claim 1, wherein the direction of folding is the front side or the back side of the pouch container.   2. The pouch container according to claim 1, wherein when the folded portion is formed on both edges of the pouch container, the direction of folding is the same for all folds or opposite to each other.   The pouch container is formed with a pouring nozzle portion having a content passage in which a distal end portion constituted by the body member is closed and a proximal end portion communicates with the void, and the folded portion is formed on both sides of the pouring nozzle portion. The pouch container according to claim 1, wherein the pouch container is formed at an edge.   The pouch container is a bifurcated pouch, and a pour-out nozzle portion having a content passage that is closed at its distal end and communicates with the void is formed at the bifurcation portion. Pouch container   7. The pouch container according to claim 5, wherein a content passage is formed in the body, and a rib is formed on the body to maintain conduction of the content passage. 8. Pouch container   The at least part of the edge of the folding | returning part formed in the front-end | tip part which the said extraction nozzle closed is formed so that the opening opening position of the said extraction nozzle may be followed. Pouch container as described   2. The pouch container according to claim 1, wherein all or a part of the folded portion is fixed to the surface of the space closer to the center than the fold. The pouch container according to claim 1, wherein the folded portion is formed except for an unsealed portion for filling the contents of the pouch container. The pouch container according to claim 2, wherein the folded portion is formed excluding the bottom material. A pouch container having an unsealed part, a body part and a bottom part for filling contents in order from the top in the longitudinal direction of the pouch container, the width of the unsealed part, the body part or the bottom part perpendicular to the longitudinal direction The said unsealed part or the said bottom part is comprised smaller than the said trunk | drum, and it is comprised so that the return | folded crease may not cover the said unsealed part and the said bottom part. Pouch container as described The pouch container according to claim 1, wherein the folded portion forms a holding recess.

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