JP2005324844A - Pouch container and manufacturing method for pouch container with gusset - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pouch container which gives a good feeling to a person who holds the container. <P>SOLUTION: The pouch container 2 is formed by sealing together the side ends of side face gusset films 4 and the side ends of flexible front/back films 3, 3. In forming the pouch container 2, at least parts of the side edges 3a of the front/back films 3 are extended outwardly of the side edges 4a of the side face gusset films 4, respectively, to form extensions 6, which are bent toward the side edges 4a of the side face gusset films 4, respectively. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pouch container in which a side end portion of a flexible film is sealed and formed into a bag shape, and a method for manufacturing a pouch container with a gusset.

  Conventionally, as a container for filling beverages, jelly-like foods, sanitary products such as detergents and shampoos, side edge seal portions are formed by heat-sealing the side edges of front and back films made of flexible films. Pouch containers are known. Also known is a pouch container with a side gusset in which a side edge seal portion is formed by interposing a side gusset film between the front and back films and heat-sealing the side edges of the front and back films and the side gusset film. Yes.

  Since the outer edge of these pouch containers is composed of the outer edge of the side end seal portion formed by heat-sealing two relatively rigid films, it is relatively hard and thin. Therefore, when the user grips such a pouch container, the feel of the hand may be poor and pain may be felt. In this regard, Japanese Patent Laid-Open No. 9-20345 discloses that the edge of the film is extended to at least a part of the outer end edge of the side end seal portion of the two synthetic resin films that are overlapped. A pouch container is disclosed in which is unbonded (unsealed). Such a pouch container is provided with an unsealed portion of the film at the edge, so that the rigidity and sharpness of the side edge can be eliminated, and the operator is not damaged during handling. is there.

  However, the means described in the above publication cannot sufficiently mitigate the rigidity and sharpness of the side edge of the pouch container. That is, the unsealed portion in the means described in the above publication is a portion where two films are overlapped, and a side end seal portion is formed in the immediate vicinity of the unsealed portion. For this reason, the unsealed portion is in a state in which the two stacked films are almost integrated, and therefore the rigidity and sharpness at the side edge of the unsealed portion still remain and are held by hand. Sometimes it feels stiff or the user feels pain.

JP-A-9-20345, [0004], [0009], FIG.

  Then, this invention makes it a subject to provide the manufacturing method of the pouch container improved so that the touch of a handle | good may become favorable, and a pouch container with a gusset.

In the present invention, as a first means, a side end seal portion is formed at a side end portion of a flexible front and back film, and an unsealed portion of the front and back film extends to at least a part of the side end seal portion. This unsealed portion is provided and provides a pouch container that is bent inward.
In such a pouch container, the unsealed part of the front and back film extended from the side end seal part is bent inward, so when the pouch container is gripped, the unsealed part comes into surface contact along the palm. Therefore, there is no possibility that the side edges of the front and back films come into contact with the hand, the touch of the handle becomes soft, and hand damage can be prevented.

Furthermore, the present invention provides, as a second means, a pouch container formed by sealing a side end portion of a side face gusset film to a side end portion of a flexible front and back film, A pouch container with a gusset is provided in which at least a part of the edge extends outward from the side edge of the side gusset film, and the extended portion is bent toward the side edge of the side gusset film.
In the pouch container, since the extended part extending from the side edge of the front and back film is bent to the side edge side of the side gusset film, when the pouch container is gripped, the extended part is faced along the palm. Contact. Moreover, since the extension part of the front and back film is bent to the side edge side of the side gusset film, when gripping, the side edge of the side gusset film and the side edge of the front and back film come into contact with the hand. There is no fear. Therefore, the touch of the hand is soft and damage to the hand can be prevented.

The present invention also includes, as a third means, a front and back film made of a flexible film having a sealant layer on the inner surface and a folded side gusset film, and the sealant layers of the front and back films and the side gusset film are stacked. A method for manufacturing a pouch container with a gusset that is formed into a bag shape by heat-sealing the side edges together, and the side edges of the front and back films extend outside the side edges of the folded side gusset film. As described above, the side gusset film is overlapped between the front and back films, and the release plate is interposed between the extended portion of the surface film and the extended portion of the back film, from above and below the front and back films. A method for producing a pouch container with a gusset for heating the extension portion and the polymerization end portion of the side gusset film is provided.
The manufacturing method of the pouch container is such that a sealant of each film is obtained by heating the extended portion and the polymerization end portion of the side surface gusset film with a release plate interposed between the extended portions of the front and back film. The layer is melted and the polymerized portions of the front and back film and the side gusset film can be heat sealed. In addition, the sealant layer in the extended part of the front and back films also melts, but the sealant layer does not adhere to other members due to the intervening release plate, and after cooling, the sealant layer shrinks, The extended portions of the front and back films bend with the sealant layer inside. Thereby, the extended part of a front and back film can obtain the pouch container with a gusset by which the side edge side of a side gusset film is bent.

According to the pouch container of the present invention, since the unsealed part extended from the front and back films is bent inward, there is no possibility that the side edges of the front and back films come into contact with the hand when gripping this. . Therefore, it has a soft feeling and there is no risk of injury to the hand.
Furthermore, according to the manufacturing method of the present invention, it is possible to easily manufacture a gusseted pouch container in which an unsealed portion extended from the front and back films is bent inward.

Hereinafter, the present invention will be specifically described with reference to the drawings.
1 to 3, 1 is attached to both sides of the front and back film 3 and a pouch container 2 with side gussets on which both side gusset films 4 are heat-sealed, and an upper end of the pouch container 2. A pouch container with a spout comprising a spout 5 is shown. Such a pouch container 1 with a spout is formed in a bag shape having respective seal portions on the outer peripheral portions of the front and back film 3 and the side gusset film 4, and after filling the contents, as shown in FIG. 3 is a self-supporting pouch in which a lower portion of 3 is bent to form a bottom surface for placement. Further, the edge portions of the front and back film 3 are extended outward from both side edges of the side gusset film 4 and are not sealed, and the extended portion 6 (unsealed portion 6) is formed in an arc shape inward. It is curved.

  Specifically, the pouch container 2 is made of a flexible laminated film of four surfaces of two side gusset films 4 and 4 folded in two with the front film 3, the back film 3 and the sealant layer being outside. Become. As each film, a film used in a known pouch container is used, and at least an innermost layer is provided with a sealant layer, and an outermost layer is provided with an outer surface layer having heat resistance (having a higher melting point than the sealant layer). Yes. Examples of the laminated film include a sealant layer having heat sealability, a base material layer for maintaining bag strength (flexibility, pinhole resistance, etc.) in order from the inside to the outside, gas barrier properties, Examples thereof include a four-layer structure (not shown) in which a barrier layer for imparting light shielding properties and the like, and an outer surface layer for imparting surface friction, heat resistance and the like are laminated. The sealant layer is not particularly limited as long as it is a heat-sealable material, and examples thereof include linear low density polyethylene. A base material layer will not be specifically limited if it is comparatively excellent in intensity | strength, Polyamide type films, such as nylon, etc. are illustrated. The barrier layer is not particularly limited as long as it has gas barrier properties, and examples thereof include a metal vapor deposition film such as aluminum. Examples of the outer surface layer include polyester films such as polyethylene terephthalate, polyamide films, and the like. In addition, the design printing in which the display of a brand name, a pattern, etc. was printed on the inner surface or the outer surface of the outer surface layer, and when applying this design printing to the inner surface, a transparent outer layer is used. .

As shown in FIG. 1, the front and back film 3 has a shape obtained by obliquely cutting the lower corners on both sides of the rectangular film, and is formed in a front hexagonal shape having inclined side edges 3b above and below the vertical side edges 3a. . Further, the side gusset film 4 has a shape obtained by obliquely cutting the lower corners on both sides of the rectangular film so as to coincide with the inclined side edges 3b of the superposed front and back films 3, and the upper and lower sides of the vertical side edges 4a. Are formed in a shape having inclined side edges 4b.
The front and back films 3 have their vertical side edges 3 a extending outward from the vertical side edges 4 a of the side gusset film 4, and their inclined side edges 3 b are inclined side edges 4 b of the side gusset film 4. The side gusset film 4 is overlapped with each other. And the side edge seal part 7 of the front and back film 3 and the side face gusset film 4 is formed by heat-sealing from the side edge 4a of the side face gusset film 4 to a predetermined width (approximately 3 to 7 mm).
As shown in FIG. 3, the extended portion 6 in which the side edge 3 a of the front and back film 3 extends is an unsealed portion in which the sealant layer is not sealed (not bonded to another film), It is bent in an arc shape with the sealant layer inside. Therefore, the extended part 6 (unsealed part 6) of the front and back films is bent toward the side edge 4a so as to hide the side edge 4a of the side face gusset film 4. The extension width is not particularly limited, but if it is too short, there is no relaxation effect, so it is about 1 mm or more, preferably 2 mm or more. , Preferably 5 mm or less.
In addition, the upper end part of the front and back film 3 is heat-sealed in a state where the heat fusion part of the spout 5 is sandwiched, whereby the spout 5 is attached. Moreover, the lower end part of the front and back film 3 is also heat-sealed.

The pouch container 2 with the gusset can be mechanically manufactured in the following manufacturing process, for example. As shown in FIG. 4, the side film original fabric 100 in which the side gusset films 4 are continuously connected is folded into two with the sealant layer on the outside, and both end portions of the surface film original fabric 101 and the back film original fabric 101 are formed. In between, the sealant layers of the respective film original fabrics 100 and 101 are introduced in an overlapping manner. At this time, in order to form the unsealed portion 6 of the front and back film 3, the side film original fabric so that the side edge 100 a of the side film original fabric 100 is located slightly inside the side edge 101 a of the front and back film original fabric 101. 100 is introduced, the side edges 101a of the front and back film original fabric 101 are extended outward, and the original films 100 and 101 are overlapped.
Next, the release plate 102 is inserted between the side end portion of the front film original fabric 101 and the side end portion of the back film original fabric 101 shown in FIGS. 5 and 6. The release plate 102 is formed of a heat-resistant material to which the sealant layer of the film original fabric is not thermally fused. For example, a metal plate subjected to fluorine processing (eg, Teflon processing [registered trademark]) is used. be able to. Moreover, the shape of the release plate 102 is a belt-like shape that is wider than the extending portion 103 of the front and back film original fabric 101 and longer than the side end seal portion 7 to be formed, in particular, the heating surface of the vertical seal table 104. Are preferably the same area or larger.
With the release plate 102 interposed between at least the extended portions 103 of the front and back film original fabric 101, the vertical sealing table 104 of the sealing device heated to the heat sealing temperature is used as the front and back film original fabric. From the top and bottom of 101, it is pressed over the extended portion 103 of the front and back film original fabric 101 and the polymerization end portion 105 of the side film original fabric 100. As shown in FIG. 6, the side end seal portion 7 is formed at the side end portion of the front and back film original fabric 101 by the clamping pressure of the vertical seal table 104. At the same time, the sealant layer in the extended portion 103 of the front and back film original fabric 101 melts but does not adhere to other members due to the intervention of the release plate 102, and after cooling, the sealant layer shrinks. The extended portion 103 of the front and back film original 101 is curved with the sealant layer inside.
Next, as shown in FIG. 6, the side seal portion 106 is pressed in the width direction of the lower end portion of the front and back film original fabric 101 to complete the heat sealing of the side end portion and the lower end portion, and cut along the cutting line 107. By doing so, the pouch container 2 having an open upper end can be obtained. After that, the spout 5 with a spout as shown in FIG. 1 can be manufactured by inserting the spout 5 from the upper end opening and heat-sealing.

The pouch container 1 with the spout is used by filling the contents through the spout of the spout 7 and screwing the cap.
Since the extended portion 6 (unsealed portion 6) of the front and back film 3 extended from the side end seal portion 7 is bent inward in the pouch container 1 with the spout, when the pouch container is gripped, The part bends along the palm and touches the palm on the face. Therefore, there is no fear that the side edges 3a of the front and back film 3 come into contact with the hand, and the feel of the handle becomes soft. Furthermore, since the side edge 3a of the front and back film 3 does not contact, there is no possibility that a hand will be damaged. Moreover, since the extension part 6 of the front and back film 3 is curved to the side edge 4a side of the side face gusset film 4, the side edge 4a of the film 4 becomes difficult to see and the container appearance is also improved.
Moreover, since the said manufacturing method can form the extension part 6 of the front and back film 3 in curved shape, when forming the side end seal part 7, the pouch container 2 with a gusset can be manufactured easily.

Note that the present invention is not limited to the above-described embodiments, and other modifications, substitutions, substitutions, additions, and the like can be made. Hereinafter, parts different from those of the above embodiments will be mainly described, and the same configuration may be referred to using terms and figure numbers, and the description thereof may be omitted.
In the above embodiment, the extended portion 6 (unsealed portion 6) of the front and back film 3 is curved in an arc shape, but the bent shape of the extended portion 6 is not limited to an arc shape, but is an obtuse angle shape. It may be bent.
Moreover, in the said embodiment, although the extension part 6 bent inside is provided in a part (perpendicular side edge 3a) of the side edge of the front and back film 3, the side of the front and back film 3 is provided. The extended portion 6 may be provided on the entire edge. But when providing the extension part 6 in a part of side edge like the said embodiment, it is preferable to provide in the center part of the side edge of the front and back film 3, ie, the location which is easy to be hold | gripped at the time of use.

Furthermore, in the said embodiment, although the pouch container 2 with the both-sides gusset which consists of a film piece of 4 surfaces in which the side gusset film 4 was provided in the both sides of the front and back film 3 is illustrated, for example, the front and back film 3 The present invention can also be applied to a pouch container with a one-side gusset made of three-sided film pieces provided with a side gusset film 4 only on one side. Moreover, it is also possible to apply this invention to the pouch container 2 in which the side gusset 4 is not provided. For example, as shown in FIG. 7, the sealant layers of the front and back film 3 are overlapped to form the side end seal portion 7 on the inner side of the side edge 3 a of the front and back film 3, and the outer edge of the side end seal portion 7. The pouch container 2 etc. in which the unsealed part 6 ensured between 7a and the side edge 3a of the front and back film 3 are mutually bent inside can be illustrated.
Further, in each of the above embodiments, the bent extended portion 6 (unsealed portion 6) is provided on both sides of the front and back film 3, but is provided only on one side of the front and back film 3. Also good.
In addition, in FIG. 7, although the self-supporting type pouch container in which the bottom film 8 is provided in the lower end part of the front and back film 3 is illustrated, the bottom film 8 is not provided. The present invention can also be applied to a flat pouch container 2 composed of two film pieces.

  Moreover, the laminated film which comprises the front and back film 3 and the side gusset film 4 is not necessarily restricted to said layer structure, For example, when a base material layer or an outer surface layer is a raw material which has gas barrier property, it is a barrier layer separately. Similarly, for example, if the outer surface layer or the barrier layer is a relatively strong material, it is not necessary to separately provide the base material layer. In addition, for example, when filling a content that does not require gas barrier properties (for example, frozen food), the barrier layer may not be provided. Furthermore, a layer different from the above-exemplified layers may be added, or a layer having a different function (for example, a nonwoven fabric layer, a foamed resin layer, etc.) may be added. Can be changed as appropriate.

In addition, in the said embodiment, although the pouch container 1 with a spout is illustrated, the aspect which does not attach the spout 5 may be sufficient.
In addition, the manufacturing method of the gusseted pouch container, after forming the side end seal portion 7 and the like, heat seals the lower end portion, but conversely forms the side end seal portion 7 and the like after heat sealing the lower end portion. You can also In addition, the pouch container of this invention is not limited to the case where it manufactures with the manufacturing method shown above, In addition, it can manufacture with various methods.

The front view which shows one Embodiment of the pouch container with a spout. However, the lightly painted portion indicates a heat seal portion (hereinafter the same). The perspective view which shows the pouch container with the same spout of the state with which the content was filled. (A) is the sectional view on the AA line of FIG. 1, (b) is the sectional view on the BB line of FIG. The reference perspective view which shows the manufacturing process of the pouch container with a side gusset, and shows the state which each film original fabric was introduced and overlapped. The width direction sectional view which shows the positional relationship of each film original fabric at the time of forming the side edge seal part and a vertical seal stand, showing the manufacturing process. The partially abbreviated top view which shows the manufacturing process and shows the formation process of each heat seal part, and the cutting process of a film. (A) is a front view of the pouch container with a spout of other embodiment in the state with which the content was filled, (b) is the CC sectional view taken on the line.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Pouch container with a spout, 2 ... Pouch container, 3 ... Surface film, back film, 3a ... Vertical side edge of front and back film, 3b ... Inclined side edge of front and back film, 4 ... Side face gusset film, 4a ... vertical side edge of side gusset film, 4b ... inclined side edge of side gusset film, 5 ... spout, 6 ... extension part (unsealed part) of front and back film, 7 ... side end seal part, DESCRIPTION OF SYMBOLS 100 ... Side film original fabric, 100a ... Side edge of side film original fabric, 101 ... Front and back film original fabric, 101a ... Side edge of front and back film original fabric, 102 ... Release plate, 103 ... Front and back film original fabric Extension part 104 ... Vertical sealing stand of the sealing device 105 ... Polymerized end portion of the side film original fabric 106, Horizontal sealing stand of the sealing device

Claims (3)

A pouch container in which a side end seal portion is formed at a side end portion of a flexible front and back film, and an unsealed portion of the front and back film is extended to at least a part of the side end seal portion,
The pouch container, wherein the unsealed portion is bent inward. A pouch container formed by sealing a side end of a side gusset film to a side end of a flexible front and back film,
At least a part of the side edge of the front and back film is extended outward from the side edge of the side gusset film, and the extended portion is bent to the side edge side of the side gusset film. Pouch container with gusset to be used. A flexible front and back film made of a film having a sealant layer on the inner surface and a folded side gusset film; and the side edges are heat sealed by overlapping the front and back films and the side gusset film sealant layers. A method for manufacturing a gusseted pouch container formed into a bag shape by:
The side gusset film is overlapped between the front and back films so that the side edges of the front and back films extend outside the both side edges of the folded side gusset film, and the extended portion of the surface film and the back film A pouch container with a gusset that heats the extending portion of the front and back film and the polymerization end portion of the side gusset film from above and below the front and back film with a release plate interposed between the extending portions. Manufacturing method.

Images