JP2019069821A - Pouch - Google Patents

Abstract

To provide a pouch capable of being formed easily into a bag at low cost by heat sealing.SOLUTION: A peripheral region of a pouch includes a first non-sealed region isolated from a storage space by one side seal region of a seal region and a second non-sealed region isolated from the storage space by the other side seal region of the seal region; openings regulated by edge parts of superposed laminate films are formed in the first non-sealed region and the second non-sealed region; one side seal region of the seal region is positioned in a first outer edge seal part, a second outer edge seal part and the middle of the first outer edge seal part and the second outer edge seal part and has a projecting part projecting to the storage space more than the first outer edge seal part and the second outer edge seal part; and a length of the second non-sealed region extended to a storage space side is shorter than a length of the first non-sealed region extended to the storage space side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pouch made by heat-sealing stacked laminated films.

  For example, pouches for microwave ovens containing retort foods and frozen foods are widely used. When the pouch is warmed in a microwave oven, the water contained in the contents evaporates along with the heating, and the pressure in the pouch increases. If the pressure in the pouch is increased, the pouch may be torn and the contents may be scattered to contaminate the inside of the microwave oven.

  Therefore, as described in Patent Document 1, a ring-shaped heat seal area is provided in a part of the pouch so as to release the vapor generated with heating to the outside of the bag, and the heat seal area is surrounded by the heat seal area. There is known a pouch having a steam vent hole in a part thereof. According to the pouch described in Patent Document 1, when the pressure in the pouch increases with heating, the ring-shaped heat seal area is peeled off, and the storage space in the pouch is the steam vent hole in the ring-shaped heat seal area Lead to This allows the vapor in the pouch to escape from the vapor vent.

Alternatively, as described in Patent Document 2, there is also known a pouch which is provided with a notch at a heat-sealed side edge and which is heat-sealed around the notch. In the pouch described in Patent Document 2, a material showing easy peelability is used in part of the heat seal area formed around the notch. For this reason, when the pressure in the pouch increases with heating, it peels from the heat-sealed area formed of a material that exhibits easy peelability, and the storage space in the pouch leads to the outside of the pouch.
This allows the vapor in the pouch to escape from the notch to the outside.

Patent No. 4029590 JP, 2010-36968, A

  However, in the pouch described in Patent Document 1, it is necessary to inspect whether or not the steam vent hole has been reliably opened at a predetermined position surrounded by the ring-shaped heat seal area. In addition, there is also a need to reliably recover the waste generated when making the steam removal hole so as not to damage the commercial property. Furthermore, it is necessary to secure a large ring-shaped heat seal area in order to absorb variations in the position of the steam vent holes, and as a result, a wide opening for filling the contents into the pouch can not be secured. The contents can not be easily filled.

  On the other hand, in the pouch described in Patent Document 2, although it is effective against the above problems, it is necessary to partially provide a material that exhibits easy releasability, and the material cost and manufacturing cost of the laminated film increase. . Furthermore, the notch is produced by cutting the laminated film that will form a pouch using individual molds and then heat-sealing the vicinity of the periphery. This adds expense to the preparation of the individual molds and increases the cost of manufacturing the pouch. As a result of these, the pouch described in Patent Document 2 can not be provided at a competitive price in the market.

  The present invention has been made in consideration of these points, and it is an object of the present invention to provide a pouch which is manufactured by heat sealing which is inexpensive and easily manufactured.

The pouch according to the present invention is a pouch made by heat-sealing stacked laminated films and having a storage space for storing contents and a surrounding area surrounding the storage space, wherein
The surrounding area is separated from the receiving space by a sealing area including a pair of side sealing areas in which the stacked laminated films are heat sealed along a pair of side edges, and the one side sealing area of the sealing area. The separated laminated film is heat-sealed from the housing space by the first unsealed area which is not heat-sealed and the other side seal area of the sealing area, and the laminated film is heat-sealed. Not having a second unsealed area,
The first unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The second unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The one side seal area of the seal area is a first outer seal portion extending along the one side edge of the pouch to the first unsealed area, and a side opposite to the first outer seal portion A second outer edge sealing portion extending along the one side edge of the pouch to the first unsealed region, and between the first outer edge sealing portion and the second outer edge sealing portion, the first outer edge sealing portion An outer edge seal portion and an overhang portion projecting toward the receiving space beyond the second outer edge seal portion, and a length of the second unsealed region extending toward the receiving space is the first unsealed region It may be a pouch whose length is shorter than the length of the sealing area extending to the housing space.

The pouch according to the present invention is a pouch made by heat-sealing stacked laminated films and having a storage space for storing contents and a surrounding area surrounding the storage space, wherein
The surrounding area is separated from the receiving space by a sealing area including a pair of side sealing areas in which the stacked laminated films are heat sealed along a pair of side edges, and the one side sealing area of the sealing area. The separated laminated film is heat-sealed from the housing space by the first unsealed area which is not heat-sealed and the other side seal area of the sealing area, and the laminated film is heat-sealed. Not having a second unsealed area,
The first unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The second unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The one side seal area of the seal area is a first outer seal portion extending along the one side edge of the pouch to the first unsealed area, and a side opposite to the first outer seal portion A second outer edge sealing portion extending along the one side edge of the pouch to the first unsealed region, and between the first outer edge sealing portion and the second outer edge sealing portion, the first outer edge sealing portion An outer edge seal portion and an overhang portion projecting toward the housing space beyond the second outer edge seal portion;
The other side seal area may be a pouch including an inner edge extending linearly from a position between the second unsealed area and the receiving space to the top of the pouch.

The pouch according to the present invention is a pouch made by heat-sealing stacked laminated films and having a storage space for storing contents and a surrounding area surrounding the storage space, wherein
The surrounding area is separated from the receiving space by a sealing area including a pair of side sealing areas in which the stacked laminated films are heat sealed along a pair of side edges, and the one side sealing area of the sealing area. The separated laminated film is heat-sealed from the housing space by the first unsealed area which is not heat-sealed and the other side seal area of the sealing area, and the laminated film is heat-sealed. Not having a second unsealed area,
The first unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The second unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The one side seal area of the seal area is a first outer seal portion extending along the one side edge of the pouch to the first unsealed area, and a side opposite to the first outer seal portion A second outer edge sealing portion extending along the one side edge of the pouch to the first unsealed region, and between the first outer edge sealing portion and the second outer edge sealing portion, the first outer edge sealing portion An outer edge seal portion and an overhang portion projecting toward the housing space beyond the second outer edge seal portion;
The first unsealed area extends from the position of the inner edge of the first outer edge seal portion of the one side seal area to the receiving space side.
The pouch according to claim 1, wherein the second unsealed area does not extend further to the receiving space than a position of an inner edge of the other side seal area.

  In the pouch according to the present invention, the length of the second unsealed area extending to the containing space may be shorter than the length of the first unsealed area extending to the containing space.

In the pouch according to the present invention, an edge of the first unsealed area is a first edge and a second edge extending from the periphery of the opening toward the accommodation space, a tip of the first edge and the edge And a third edge extending between the tip of the second edge and
The first outer edge seal portion extends along the one side edge of the pouch to the first edge of the first unsealed area;
The second outer edge seal portion may extend along the one side edge of the pouch to the second edge of the first unsealed area.

  In the pouch according to the present invention, the overhang may be at least adjacent to a portion of the first edge and the third edge.

  In the pouch according to the present invention, the width of the overhang portion may be narrower than the width of the first outer edge seal portion.

  In the pouch according to the present invention, the width of the overhanging portion may be the width of a portion of the overhanging portion adjacent to the third edge.

The present invention is a method of manufacturing a pouch which is made into a bag by heat-sealing stacked laminated films, and which has a storage space for storing contents and a peripheral area surrounding the storage space,
The surrounding area is separated from the receiving space by a sealing area including a pair of side sealing areas in which the stacked laminated films are heat sealed along a pair of side edges, and the one side sealing area of the sealing area. The separated laminated film is heat-sealed from the housing space by the first unsealed area which is not heat-sealed and the other side seal area of the sealing area, and the laminated film is heat-sealed. Not having a second unsealed area,
The first unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The second unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The one side seal area of the seal area is a first outer seal portion extending along the one side edge of the pouch to the first unsealed area, and a side opposite to the first outer seal portion A second outer edge sealing portion extending along the one side edge of the pouch to the first unsealed region, and between the first outer edge sealing portion and the second outer edge sealing portion, the first outer edge sealing portion An outer edge seal portion and an overhang portion projecting toward the housing space beyond the second outer edge seal portion;
The manufacturing method is
Preparing a laminated film to which a plurality of the pouches can be allocated;
The laminated film is heat sealed to obtain the laminated film,
A heat sealed area comprising the area to be one of the side seal area and the other side seal area;
The first unsealed area and the second unsealed area surrounded by the heat-sealed area and the area to be the accommodation space, which are sandwiched between the two heat-sealed areas adjacent in the lateral direction An area that has not been heat sealed, including an area to be an area;
Partitioning into
The laminated film is cut, and the heat sealing area, which is to be one of the side seal area and the other side seal area, of the heat sealed areas is one of the side seal areas and The first unsealed area and the second unsealed area are divided into the other side seal area and not heat-sealed, and the first unsealed area and the second unsealed area are the first unsealed area and the second unsealed area. And b. A cutting step of dividing into two unsealed regions.

  According to the present invention, it is possible to inexpensively and easily manufacture a pouch made by heat sealing.

FIG. 1 is a plan view showing an example of a pouch according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the laminating direction (normal direction) of the laminated film forming the trunk and the bottom of the pouch shown in FIG. 1, and is a view for explaining the layer structure of the laminated film. FIG. 3 is an enlarged plan view showing a first unsealed area of the pouch shown in FIG. FIG. 4 is an enlarged plan view showing another example of the shape of the first unsealed area. FIG. 5 is an enlarged plan view showing still another example of the shape of the first unsealed area. 6 is a plan view showing a second unsealed area of the pouch shown in FIG. 1 in an enlarged manner. FIG. 7 is a plan view showing another example of the form of the sealing area of the pouch shown in FIG. FIG. 8 is a view corresponding to FIG. 1 and is a plan view showing the dimensions of the pouch according to Examples 1 to 4. FIG. 9 is a view corresponding to FIG. 1, and is a plan view showing the dimensions of the pouch according to the fifth embodiment. FIG. 10 is a view corresponding to FIG. 1 and is a plan view showing the dimensions of the pouch according to Comparative Example 4. FIG. 11 is a plan view showing a state in which the pouch shown in FIG. 9 is inclined in order to evaluate the leakage difficulty of contents.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, for the sake of easy illustration and understanding, the scale, vertical and horizontal dimensional ratios, etc. are exaggerated and changed from those of a real thing as appropriate. FIG. 1 is a plan view showing an example of a pouch according to an embodiment of the present invention.

  The pouch 1 shown in FIG. 1 is a standing pouch which is formed by heat sealing the body 10 and the bottom 20. As shown in FIG. 1, the body portion 10 includes a pair of main surface sheets 11 composed of a front main surface sheet 11 a and a back main surface sheet 11 b disposed to face each other, and a pair of overlapped The side edge 13 vicinity of the main surface sheet 11 is heat-sealed mutually. A bottom sheet 21 forming a bottom 20 is disposed between lower edges 14 of the pair of main surface sheets 11. Then, in a space surrounded by the pair of main surface sheets 11 and the bottom surface sheet 21, a storage space 2 for storing the contents is partitioned. The bottom sheet 21 is bent so as to be convex toward the accommodation space 2, and the vicinity of the periphery is heat-sealed together with the lower portion of the overlapping main surface sheet 11. The bottom sheet 21 holds the shape of the lower end of the pair of main surface sheets 11 to provide the pouch 1 with a self-supporting property.

  Further, as shown in FIG. 1, in the pouch 1, an opening 4 is formed between the upper edges 12 of the pair of main surface sheets 11, and the contents are filled from the opening 4. After the contents are filled, the portion around the upper edge 12 provided with the opening 4 is sealed by heat sealing to obtain the pouch 1.

  In the pouch 1 of the standing type shown in FIG. 1, the upper edge 12 of the pair of main surface sheets 11 forming the overlapping trunk portion 10, the side edge 13 of the pair of main surface sheets 11 overlapping, and the lower edge of the overlapping main surface sheet 11 The outer edge 5 of the pouch 1 is defined by 14 and the edge of the bottom sheet 21.

(Laminated film)
In the present embodiment, the pair of main surface sheets 11 forming the trunk 10 and the bottom sheet 21 forming the bottom 20 are made of the laminated film 30. The layer configuration of the laminated film 30 is shown in FIG. As described above, the pouch 1 is made into a bag by heat sealing the laminated film 30 forming the pair of main surface sheet 11 and the bottom surface sheet 21. For this reason, the laminated film 30 is provided with a sealant layer 34 having a sealing property in a portion to be the inner side of the container. Moreover, in the pouch 1 for microwave ovens, the base material layer 31 to be a printing base material is provided at a portion on the container outer side than the sealant layer 34. Furthermore, the laminated film 30 includes an intermediate layer 33 in order to provide various functions required for a pouch for a microwave oven. Therefore, the laminated film 30 having such a layer configuration is directed from the outer side of the container to the inner side of the container when making the pouch 1 into a pouch 1, the base layer 31, the intermediate layer 33, and the sealant The layers 34 are included in this order. Each layer will be described in detail below.

  As mentioned above, the pouch 1 for microwave ovens is required to be resistant to heat. For this reason, the base material layer 31 of the present embodiment is made of a material having heat resistance. For example, as the base material layer 31, a stretched polyethylene terephthalate film, a silica-deposited stretched polyethylene terephthalate film, an alumina deposited stretched polyethylene terephthalate film, a stretched nylon film, a stretched polypropylene film, or a polypropylene / ethylene-vinyl alcohol copolymer co-pressed co-stretched film Or a composite film in which two or more of these films are laminated can be used.

  Preferably, the base material layer 31 is biaxially stretched. As a result, the molecules forming the base layer 31 are aligned in the stretching direction by the stretching process, and the base layer 31 exhibits excellent dimensional stability. Moreover, easy-opening property can be provided to the base material layer 31 by biaxial stretching processing.

  The thickness of such a base material layer 31 is, for example, about 10 to 50 μm. In this case, the product cost can be suppressed while the heat resistance required for the pouch 1 is satisfied. In addition, the base material layer 31 of this Embodiment functions also as a layer which becomes the container outer side most when making a bag into pouch 1 among laminated | multilayer film 30. FIG.

  Further, as shown in FIG. 2, in the present embodiment, a pattern layer 32 including a pattern is laminated on the surface of the base material layer 31 on the inner side of the container. Here, the design is a recording target of various modes that can be recorded or printed on the base material layer 31, and is not particularly limited, and a figure, a character, a pattern, a pattern, a symbol, a design, a mark, etc. Widely included. In particular, in the laminated film 30 used for the pouch 1 intended to contain a food, as a design, a character indicating the information such as the figure of the contents, the brand name of the contents, the expiration date, the production date, and the production number Is used. However, the design layer 32 is laminated on the base material layer 31 according to the specification of the product, and the design layer 32 may not be provided on the base material layer 31.

  In the present embodiment, the picture layer 32 is applied not to the outer surface of the base layer 31 on the container outer side but to the inner surface of the base layer 31. In this case, since the picture layer 32 is excellent in abrasion resistance, it is possible to effectively prevent the disappearance due to rubbing or the like, and also to effectively prevent the falsification of the picture. In addition, when the bag is made into the pouch 1, the base layer 31 has transparency so that the pattern layer 32 laminated on the inner surface of the base layer 31 can be viewed through the base layer 31. Is preferred.

  As described above, the sealant layer 34 is provided to laminate the two laminated films 30 together and heat-seal the vicinity of the facing edge to bond and seal the edge. Further, in the present embodiment, the sealant layer 34 is disposed on the most inner side of the laminated film 30 when the bag is made into the pouch 1.

  As such a sealant layer 34, a heat-resistant film and an easy peel film made of a polyolefin resin such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-propylene block copolymer and the like can be adopted. Furthermore, the sealant layer 34 may be configured as a single layer by a film made of these materials, or alternatively, the sealant layer 34 may be configured as a multilayer by a plurality of films made of the above-described materials.

  In particular, when the laminated film 30 is applied to the pouch 1 requiring heat resistance such as a pouch for a microwave oven, the sealant layer 34 is a non-oriented polypropylene layer (CPP layer) mainly containing non-oriented polypropylene (CPP), Alternatively, it is preferable to have a linear low density polyethylene layer (LLDPE layer) mainly containing linear low density polyethylene (LLDPE).

The thickness of the sealant layer 34 is preferably in the range of 40 μm to 200 μm.
In this case, not only the impact resistance against drop which may occur in the distribution process of the pouch 1 is excellent, but also the handleability such as the ease of filling the contents and the ease of refilling the contents is excellent.

  On the other hand, the intermediate layer 33 laminated between the base material layer 31 and the sealant layer 34 is provided to compensate for various functions required for the pouch for a microwave oven. As described above, the pouch 1 is a pouch suitable for containing a food as a content. Thus, the intermediate layer 33 prevents the permeation of water vapor and the permeation of gases such as oxygen gas so that the contents can be preserved while preventing deterioration such as oxidation of the contents. It may have gas barrier properties. In addition, the pouch 1 of the standing pouch type is displayed in a stand-alone state on the product shelf of the counter. The intermediate layer 33 may have flex resistance and impact resistance so that the pouch 1 can sufficiently withstand an impact or the like when the pouch 1 is dropped from the product shelf. In addition, the middle layer 33 may have a function of sufficiently enhancing the concealing property so that the contents of the pouch 1 are not visible, in order to increase the consumer's purchase intention.

  As the intermediate layer 33 having such a function, for example, polyolefin such as polyethylene terephthalate, polyamide, polyethylene, polypropylene, polyvinyl chloride, polycarbonate, polyvinyl alcohol, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer saponified product, etc. Or films coated with polyvinylidene chloride or films deposited with an inorganic substance such as silicon oxide or aluminum oxide or films of polyvinylidene chloride or the like. Also, one or more of these substrates may be used in combination.

  As shown in FIG. 2, in the present embodiment, the bonding layer 35 is interposed between the base material layer 31 and the intermediate layer 33 and between the intermediate layer 33 and the sealant layer 34. As the bonding layer 35, for example, an adhesive generally used in a dry lamination method known per se can be used. For example, a polyvinyl acetate adhesive, a polyacrylate adhesive, a cyanoacrylate adhesive An ethylene copolymer based adhesive, a cellulose based adhesive, a polyester based adhesive, a polyamide based adhesive, an amino resin based adhesive, an epoxy based adhesive, a polyurethane based adhesive and the like can be used.

(Surrounding area)

  The peripheral region 3 is defined by the pair of main surface sheets 11 and the bottom surface sheet 21 made of such a laminated film 30. The surrounding area 3 composed of the pair of main surface sheets 11 and the bottom sheet 21 surrounds the accommodation space 2 for accommodating the contents. As shown in FIG. 1, the surrounding area 3 is separated from the accommodation space 2 by the sealing area 50 and the sealing area 50 in which the stacked laminated film 30 is heat sealed, and the stacked laminated film 30 is heat sealed. And a first unsealed area 60.

  Among them, the first unsealed region 60 is provided to communicate with the storage space 2 and release the vapor in the pouch to the outside when the pressure in the pouch is increased by the vapor generated by the heating by the microwave oven. It is done. The first unsealed area 60 projects from the outer edge 5 of the pouch 1 to the housing space 2 side. The first unsealed area 60 in the present embodiment is formed of a laminated film 30 forming a stacked main surface sheet 11 which is not heat sealed. Accordingly, the first unsealed area 60 is formed with an opening 61 defined by the edge of the stacked laminated film 30. In the illustrated example, the opening 61 is formed by the side edges 13 of the pair of main surface sheets 11 overlapped. Note that the entire area of the first unsealed area 60 may not be covered by the laminated film 30 forming the main surface sheet 11, and a hole may be formed in a portion of each main surface sheet 11 located in the first unsealed area 60. You may provide a cutout.

  In FIG. 3, the 1st unsealed area | region 60 of the pouch 1 shown in FIG. 1 is expanded and shown. As shown in FIG. 3, the edge 62 of the first unsealed area 60 has a first edge 63 and a second edge 64 extending from the periphery of the opening 61 toward the accommodation space 2, and a first edge 63. And a third edge 65 extending between the tip of the second edge 64 and the tip of the second edge 64. In the illustrated example, the first edge 63 is disposed on the lower edge 14 side of the main surface sheet 11, and the second edge 64 is disposed on the upper edge 12 side of the main surface sheet 11. However, the first edge 63 may be disposed on the upper edge 12 side of the main surface sheet 11, and the second edge 64 may be disposed on the lower edge 14 side of the main surface sheet 11.

  As shown in FIG. 3, the first edge 63 and the second edge 64 of the first unsealed region 60 extend linearly in the direction crossing the outer edge 5 of the pouch 1, more specifically in the direction orthogonal thereto. ing. In the present embodiment, the first edge 63 extends parallel to the second edge 64. In addition, the length L1 of the first edge 63 is equal to the length L2 of the second edge 64. Thus, when the third edge 65 extends linearly between the tip of the first edge 63 and the tip of the second edge 64, the third edge 65 extends parallel to the outer edge 5 of the pouch 1. , And perpendicular to the first edge 63 and the second edge 64. In this case, the edge 62 of the first unsealed area 60 extends along the substantially U-shaped shape. In the present embodiment, the length L 3 of the third edge 65 is shorter than the length L 1 of the first edge 63 and the length L 2 of the second edge 64.

  In the illustrated example, the first edge 63, the second edge 64, and the third edge 65 are illustrated as extending in a straight line, but may extend along a curved path. Also, the first edge 63 may extend non-parallel to the second edge 64 or may have a different length than the second edge 64. FIGS. 4 and 5 show another example of the path along which the edge 62 of the first unsealed area 60 extends. In the example shown in FIG. 4, the third edge 65 extends along a curved path between the tip of the first edge 63 and the tip of the second edge 64. Specifically, the third edge 65 extends along a curved path so as to be convex toward the accommodation space 2 side. In other words, the third edge 65 extends along a curved path in a region closer to the accommodation space 2 than a virtual straight line connecting the tip of the first edge 63 and the tip of the second edge 64 ing.

  Alternatively, in the example shown in FIG. 5, the first unsealed region 60 protrudes from the outer edge 5 of the pouch 1 toward the housing space 2 and then further protrudes toward the lower edge 14. Specifically, after the third edge 65 extends along the U-shaped path from the tip of the first edge 63 toward the lower edge 14, the third edge 65 is straight toward the tip of the second edge 64. Extend along the path of

By the way, it is also conceivable to form the edge 62 of the first unsealed region 60 so as to extend along the substantially V-shaped shape. In other words, the edge of the first non-sealed area 60 consists of only the first edge and the second edge extending from the periphery of the opening 61 toward the accommodation space 2, and the tip and the second edge of the first edge The form which piled up with the tip of the part is also considered. However, in this case, if unintended vibration or shock is transmitted to the pouch during transportation or storage, a large load is intensively concentrated near the intersection between the tip of the first edge and the tip of the second edge, and the vicinity of the intersection There is a possibility that peeling may occur in the seal area 50. On the other hand, in the present embodiment, the edge 62 of the first unsealed region 60 further includes a third edge 65 extending between the tip of the first edge 63 and the tip of the second edge 64. .
Therefore, even if unintended vibrations or shocks are transmitted to the pouch during transportation or storage, a large load is not intensively applied between the tip of the first edge 63 and the tip of the second edge 64. Peeling can be prevented from occurring in the portion (the overhang portion 54 described later) of the seal region 50 adjacent to the third edge 65.

  On the other hand, the sealing area 50 has a function of sealing the storage space 2 for storing contents by heat sealing the stacked laminated film 30. As described above, the seal area 50 is formed by heat sealing the vicinity of the peripheral edge of the stacked laminated film 30, and the main surface sheet 11 and the bottom sheet 21 are formed of the same laminated film 30. Therefore, when heat sealing near the periphery of the stacked laminated film 30 under the same heat sealing conditions, the bonding strength at any one point in the sealing region 50 is equal to the bonding strength at another one point. Therefore, when the pressure in the pouch 1 is increased with heating, the seal region 50 is easily peeled off due to stress concentration induced due to the position, shape, etc. of the seal region 50, and the seal region. It largely depends on the width of 50.

  As shown in FIG. 1, the outer edge 50a of the seal area 50 is the edge 12-14 of the main surface sheet 11, the edge 63 of the first unsealed area 60 or the edge 72 of the second unsealed area 70 described later. It extends circumferentially along. On the other hand, the inner edge 50b of the seal area 50 extends circumferentially with a space from the outer edge 50a. In the present specification, the width of the seal area 50 refers to the distance between the inner edge 50 b and the outer edge 50 a.

  As shown in FIG. 1, in the seal area 50 of the present embodiment, a side seal area 51 obtained by heat-sealing the vicinity of the side edge 13 of the pair of main surface sheets 11 and the vicinity of the upper edge 12 of the pair of main surface sheets 11 An upper seal area 52 (the area enclosed by a two-dot chain line in FIG. 2), and a lower seal area 53 heat-sealed near the periphery of the bottom sheet 21 and near the lower edge 14 of the main sheet 11; Contains.

  As shown in FIG. 3, the side seal area 51 of the present embodiment includes a first outer edge seal portion 55 extending along the outer edge 5 of the pouch 1 to the first edge 63 of the first unsealed area 60; And a second outer edge seal portion 56 extending along the outer edge 5 of the pouch 1 to the second edge 64 of the first unsealed area 60. In addition, the side seal area 51 is located between the first outer edge seal portion 55 and the second outer edge seal portion 56, and is directed to the accommodation space 2 more than the first outer edge seal portion 55 and the second outer edge seal portion 56. And an overhanging portion 54 that protrudes.

The overhang portion 54 is at least adjacent to a portion of the first edge 63 and the third edge 65.
In the present embodiment, the overhanging portion 54 is also adjacent to a portion of the second edge 64. And as shown in FIG. 3, the overhang | projection part 54 forms the level | step difference 57, 58 with respect to both the 1st outer edge seal | sticker part 55 and the 2nd outer edge seal | sticker part 56. As shown in FIG.

  As shown in FIG. 3, the width W1 of the overhang portion 54 is narrower than the width of the portion other than the overhang portion 54 of the seal region 50. Therefore, when the bonding force at each point in the seal area 50 is equal, the seal area 50 is most easily peeled off at the overhang portion 54.

  Moreover, as for the seal | sticker strength in a pair of main surface sheets 11 in the overhang | projection part 54, 50 N / 15 mm or less is preferable at 100 degreeC. In this case, when the pressure in the pouch 1 is increased with the heating by the microwave, the possibility that the packaging bag 1 may be broken can be reduced. The seal strength in the pair of main surface sheets 11 at the overhang portion 54 of the present embodiment is 35 N / 15 mm or less at 100 ° C. In this case, when the pressure in the pouch 1 increases with the heating by the microwave, the peeling is reliably started from the overhanging portion 54, and the vapor in the pouch 1 is reliably released from the first unsealed region 60. be able to. Preferably, the seal strength in the pair of main surface sheets 11 at the overhanging portion 54 is 30 N / 15 mm or less at 100 ° C. In addition, seal strength here means the value (N / 15 mm) of seal strength measured based on JISZ0238. In addition, when the width of the sample piece can not be secured 15 mm, the sample piece having a width smaller than 15 mm is collected and the seal strength is measured, and the obtained value is (15 mm / width of the sample piece The value multiplied by) is adopted as the value of seal strength (N / 15 mm).

  Further, in the present embodiment, the size of the step 57 formed by the overhang portion 54 with respect to the first outer edge seal portion 55 is 3 mm or more. In this case, when the pressure in the pouch 1 is increased, stress tends to be intensively applied to the overhanging portion 54 projecting from the outer edge 5 of the pouch 1 to the accommodation space 2 side. Thereby, peeling of a pair of main surface sheets 11 from the overhang | projection part 54 comes to be started easily.

  Further, as shown in FIG. 3, the width W 2 of the first outer edge seal portion 55 is narrower than the width W 3 of the second outer edge seal portion 56. Further, in the direction orthogonal to the width direction, the length of the first outer edge seal portion 55 is longer than the length of the second outer edge seal portion 56.

  As shown in FIG. 1, the second outer edge seal portion 56 is formed with a notch 7 which can be a starting point for opening. The notch 7 penetrates the main surface sheet 11 forming the trunk 10. The notch 7 may be a cut formed in the second outer edge seal portion 56 or may be a notch having a predetermined width. By forming the notch 7 in the second outer edge seal portion 56, the body portion 10 can be easily opened from the notch 7.

  By the way, if the manufacturing method of such a pouch 1 is described, first, the trunk material sheet which will form the trunk | drum 10 and the base material sheet which will form the bottom part 20 will be arrange | positioned in a predetermined position. The areas (except for the upper seal area 52) to be the seal areas 50 of the plurality of pouches 1 to be made into bags are heat sealed. At this time, the area not heat-sealed in the body sheet is divided by the area heat-sealed into the area to be the accommodation space 2 of each pouch 1 and the area to be the first unsealed area 60. Ru. Thereafter, the plurality of pouches 1 are manufactured by cutting the heat-sealed portion according to the shape of each pouch 1. The contents are filled from the opening 4 formed between the upper edges 12 of the pair of main surface sheets 11 of the obtained pouch 1 and the pouch 1 is heat sealed by heat sealing the vicinity of the upper edge 12 provided with the openings 4. Seal the

  In this manufacturing method, when the first unsealed area 60 which is not heat-sealed is formed with the dimensions as designed, if the cut position between the adjacent pouches 1 deviates due to the processing accuracy, the heat is generated. The sealed area may close the opening 61 of the first unsealed area 60. Therefore, in the present embodiment, the second unsealed area 70 separated from the accommodation space 2 by the seal area 50 is at a position facing the first unsealed area 60 across the accommodation space 2 in the surrounding area 3. It is provided. In this case, if the body sheet and the base sheet are heat-sealed to the seal area 50 of each pouch 1, the first unsealed area 60 of one pouch 1 and the second unsealed area of the other pouch 1 It will be in the state where 70 was connected. Therefore, even if the position to be cut between the adjacent pouches 1 is shifted due to the processing accuracy, the second unsealed region 70 is provided in one pouch 1 so that the other pouch 1 It is possible to prevent the opening 61 of the first unsealed region 60 from being blocked.

  The second unsealed area 70 projects from the outer edge 5 of the pouch 1 toward the housing space 2. The second non-sealed area 70 in the present embodiment is formed of a laminated film 30 forming a stacked main surface sheet 11 which is not heat sealed. Therefore, in the second unsealed area 70, an opening 71 defined by the edge of the laminated film 30 stacked is formed. In the illustrated example, the opening 71 is formed by the side edges 13 of the pair of main surface sheets 11 overlapped.

  In FIG. 6, the 2nd unsealed area | region 70 of the pouch 1 shown in FIG. 1 is expanded and shown. As shown in FIG. 6, the edge 72 of the second unsealed area 70 extends along a generally U-shaped configuration. The length L4 of the second unsealed region 70 extending toward the accommodation space 2 is shorter than the length L1 of the first edge 63 and the length L2 of the second edge 64. On the other hand, the length L5 of the second unsealed region 70 in the direction orthogonal to the extending direction is equal to the length L3 of the third edge 65.

  Further, as shown in FIG. 6, the width W4 of the side seal region 51 located between the second unsealed region 70 and the accommodation space 2 is wider than the width W1 of the overhang portion 54. Furthermore, the width of the side seal area 51 in the portion adjacent to the second unsealed area 70 is wider than the width W 1 of the overhang portion 54.

The width W1 of the overhanging portion 54 is set to, for example, about 2.5 to 5 mm, and the width W2 of the first outer edge seal portion 55 is set to, for example, about 5 to 8 mm. The width W3 of the second outer edge seal portion 56 is set to, for example, about 8 to 15 mm. The size of the step 57 is set, for example, to about 3 to 15 mm, and the length L4 of the second unsealed region 70 extending to the accommodation space 2 side is set to, for example, about 1 to 3 mm. The length L3 of the third edge 65 and the length L5 of the second unsealed area 70 are set to, for example, about 4 to 15 mm. In particular, by setting the length L3 of the third edge 65 to 4 mm or more, an opening formed in the first unsealed area 60 is the vapor in the pouch 1 that flows out from the overhang 54 peeled off with heating. It can be led at 61 with a sufficient flow rate. In addition, when it represents with the value which divided | segmented length L 3 of the 3rd edge 65 by the area of the accommodation space 2, it is preferable that the said value is 1.8 * 10 < ^-4 > mm < ^-1 > or more.

  Next, the operation of the present embodiment configured as described above will be described.

  When the pouch 1 is placed in a microwave oven and warmed, the moisture contained in the contents is warmed by the high frequency emitted from the microwave oven, and the contents are heated. With the heating, the water contained in the contents evaporates and the pressure in the pouch increases. As described above, the overhanging portion 54 protruding toward the accommodation space 2 forms a step 57 having a size of 3 mm or more with respect to the first outer edge seal portion 55 and has the narrowest width in the seal region 50. It has become. Therefore, when the pressure in the pouch increases, peeling of the pair of main surface sheets 11 from the overhanging portion 54 is started. When peeling of the overhanging portion 54 progresses and the housing space 2 and the first unsealed area 60 are connected, the vapor in the pouch 1 can be released from the first unsealed area 60 to the outside.

  When the heating in the microwave oven is finished, the portion of the surrounding area 3 which is in contact with the vapor, such as the portion surrounded by the inner edge 50b of the sealing area 50, becomes hot. On the other hand, the seal area 50 included in the surrounding area 3 is not easily heated because it does not touch the steam. In particular, according to the present embodiment, the width W 2 of the first outer edge seal portion 55 is narrower than the width W 3 of the second outer edge seal portion 56. Thus, the second outer edge seal portion 56 is wider at a portion not hotter than the first outer edge seal portion 55. For this reason, even if the second outer edge seal portion 56 is pinched with a finger, it does not feel hotter than pinching the first outer edge seal portion 55 with a finger. Then, the second outer edge seal portion 56 is pinched with a finger, and the body 10 is opened from the notch 7 provided in the second outer edge seal portion 56. Thereby, the content accommodated in the accommodation space 2 can be taken out without feeling excessive heat.

  As described above, according to the present embodiment, the opening 61 defined by the edge portion of the stacked laminated film 30 is formed in the first unsealed region 60, and overhangs toward the accommodation space 2. The overhang portion 54 forms a step 57 having a size of 3 mm or more with respect to the first outer edge seal portion 55, and the width W1 of the overhang portion 54 is the width of a portion other than the overhang portion 54 of the seal region 50. It is narrower than. According to such a configuration, when the pressure in the pouch 1 increases with heating, peeling of the pair of main surface sheets 11 from the overhanging portion 54 is started, and the vapor in the pouch 1 is made into the first unsealed area It can escape from 60 to the outside. Therefore, as in the pouch described in Patent Document 2, it is not necessary to partially provide a material exhibiting peelability, and the material cost and manufacturing cost of the laminated film 30 that forms the pouch 1 can be suppressed inexpensively. it can. Furthermore, the first unsealed area 60 is formed by the stacked laminated film 30 which is not heat sealed. For this reason, it is not necessary to cut | disconnect the laminated | multilayer film 30 which will make the pouch 1 using a separate type | mold, and the manufacturing cost of the pouch 1 can be held down cheaply. As a result of these, according to the present embodiment, the pouch 1 made into a bag by heat sealing can be easily manufactured at low cost.

Further, according to the present embodiment, the opening 61 defined by the edge of the stacked laminated film 30 is formed in the first unsealed region 60, and the edge 62 of the first unsealed region 60 is formed. A third edge 63 and a second edge 64 extending from the periphery of the opening 61 toward the accommodation space 2 and a third edge extending between the tip of the first edge 63 and the tip of the second edge 64; And an edge 65.
That is, the first unsealed region 60 projects from the edge of the laminated film 30 to the accommodation space 2 side. In this case, it is possible to secure a wide opening for filling the contents into the pouch, and the contents can be easily filled. Further, according to the present embodiment, since it is not necessary to form the vapor vent as in the pouch described in Patent Document 1, the problem of inspection and recovery of scrap that may occur with the formation of the vapor vent. It can not happen either.

  Further, according to the present embodiment, the first edge 63 of the first unsealed region 60 extends parallel to the second edge 64, and the length L1 of the first edge 63 is the second edge It is equal to the length L2 of the part 64. In this case, the vapor in the pouch 1 that flows out from the overhanging portion 54 peeled off with heating can be smoothly introduced toward the opening 61 formed in the first unsealed region 60.

  Further, according to the present embodiment, the second unsealed area separated from the accommodation space 2 by the seal area 50 at the position facing the first unsealed area 60 across the accommodation space 2 in the surrounding area 3. 70 is provided, and the second unsealed area 70 is formed with an opening 61 defined by the edge of the stacked laminated film 30. According to such a configuration, the opening 61 of the first unsealed area 60 of the pouch 1 is blocked even if the position to be cut between the adjacent pouches 1 deviates due to processing accuracy. Can be prevented.

  Further, according to the present embodiment, the width W 2 of the first outer edge seal portion 55 is narrower than the width W 3 of the second outer edge seal portion 56. In this case, after the heating in the microwave oven is finished, the second outer edge seal portion 56 is wider than the first outer edge seal portion 55 without being heated. Thus, after the heating in the microwave oven is completed, the second outer edge seal portion 56 can be fingered without feeling excessive heat. In particular, according to the present embodiment, the notch 7 is formed in the second outer peripheral seal portion 56. Therefore, since the second outer edge seal portion 56 can be pinched with a finger without feeling excessive heat, the body 10 can be quickly opened from the notch 7 provided in the second outer edge seal portion 56. Further, since the width W2 of the first outer edge seal portion 55 is narrower than the width W3 of the second outer edge seal portion 56, the width W2 of the first outer edge seal portion 55 and the width W3 of the second outer edge seal portion 56. As compared with the case where is the same, the housing space 2 can be widely secured while maintaining a state in which the second outer edge seal portion 56 can be pinched with a finger without feeling excessive heat.

  Further, according to the present embodiment, the overhanging portion 54 is also adjacent to a portion of the second edge 64, and the overhanging portion 54 includes the first outer seal portion 55 and the second outer seal portion 56. Steps 57, 58 are formed for both. In this case, since the overhanging portion 54 easily adjoins the accommodation space 2 in a wide range, if the pressure of the accommodation space 2 is increased with heating, peeling from the overhanging portion 54 can be easily started.

«Modification»
Note that various modifications can be made to the embodiment described above. Hereinafter, an example of a modification will be described with reference to the drawings. In the following description and the drawings used in the following description, with respect to parts that can be configured in the same manner as the above-described embodiment, the same reference numerals as those used for the corresponding parts in the above-described embodiment are used. Duplicate descriptions will be omitted.

  In the embodiment described above, as shown in FIG. 3, the overhanging portion 54 is also adjacent to a portion of the second edge 64 and to both the first outer seal portion 55 and the second outer seal portion 56. On the other hand, although the example which forms the level | step differences 57 and 58 was shown, the form of the seal | sticker area | region 50 is not limited to the example mentioned above. FIG. 7 shows another example of the form of the seal area. In the example shown in FIG. 7, the overhanging portion 54 is adjacent to a part of the first edge 63 and the third edge 65 and not adjacent to the second edge 64. The overhanging portion 54 forms a step 57 with respect to the first outer edge seal portion 55, and is flatly connected to the second outer edge seal portion 56. That is, the overhang portion 54 does not form a step with respect to the second outer edge seal portion 56. According to such a configuration, the width W3 of the second outer edge seal portion 56 can be easily secured wider than the width W2 of the first outer edge seal portion 55. For this reason, after finishing heating in the microwave, the second outer edge seal portion 56 has a wider portion that is not hotter than the first outer edge seal portion 55. Therefore, after the heating in the microwave oven is finished, the second outer edge seal portion 56 can be pinched with a finger without feeling the heat.

In the embodiment described above, as shown in FIG. 1, the pouch 1 is an example of the standing type pouch formed by heat sealing the body 10 and the bottom 20, but the form of the pouch Is not limited to such an example. The pouch may be a flat pouch, a three-sided seal type, a pillow type, or a gusset type pouch.
Moreover, the pouch according to one embodiment of the present invention is a pouch which is made into a bag by heat-sealing the stacked laminated film and has a storage space for storing the contents and a surrounding area surrounding the storage space. The peripheral area is a seal area in which the stacked laminated film is heat sealed, and a first unsealed area which is separated from the accommodation space by the seal area and in which the stacked laminated film is not heat sealed. And the first unsealed area is formed with an opening defined by the edge of the stacked laminated film, the edge of the first unsealed area being around the opening The seal includes a first edge and a second edge extending toward the accommodation space, and a third edge extending between a tip of the first edge and a tip of the second edge, the seal region A first outer seal portion extending along the outer edge of the pouch to the first edge of the first unsealed area, and extending along the outer edge of the pouch to the second edge of the first unsealed area A second outer edge seal portion is located between the first outer edge seal portion and the second outer edge seal portion, and protrudes toward the accommodation space beyond the first outer edge seal portion and the second outer edge seal portion An overhanging portion, wherein the overhanging portion is adjacent to a portion of the first edge and the third edge, and the overhanging portion is 3 mm or more with respect to the first outer edge seal portion A step may be formed, and the width of the overhang portion of the seal area may be narrower than the width of a portion other than the overhang portion of the seal area.
In the pouch according to one embodiment of the present invention, the first edge of the first unsealed area extends parallel to the second edge, and a length of the first edge is the second edge. It may be equal to the length of two edges.
In the pouch according to one embodiment of the present invention, the seal strength of the overhang portion of the seal area may be 35 N / 15 mm or less at 100 ° C.
In the pouch according to one embodiment of the present invention, a second unsealed area separated from the accommodation space by the seal area at a position facing the first unsealed area across the accommodation space among the surrounding area. And the second unsealed area is formed with an opening defined by the edge of the stacked laminated film, and the seal area of the portion located between the second unsealed area and the receiving space The width of the may be wider than the width of the overhang.
In the pouch according to one embodiment of the present invention, the width of the first outer edge seal portion may be narrower than the width of the second outer edge seal portion.
In the pouch according to one embodiment of the present invention, the second outer edge seal portion may be formed with a notch.
In the pouch according to one embodiment of the present invention, the overhanging portion is also adjacent to a portion of the second edge, and the overhanging portion also forms a step with respect to the second outer edge seal portion. It may be
In the pouch according to one embodiment of the present invention, the overhanging portion may be flatly connected to the second outer edge seal portion.

First Embodiment
Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples. As described below, the pouches according to Examples 1 to 4 and Comparative Examples 1 to 3 were produced and evaluated for the steam removing function.

(Example)
Examples 1 to 4 correspond to the pouch of the standing type shown in FIG.

  With the body sheet to form the body and the bottom sheet to form the bottom at a predetermined position, heat sealing is performed on the area to be the seal area of each pouch to be made of the sheets. did. At this time, the area which was not heat-sealed in the body sheet was divided by the area heat-sealed into the area which should be the accommodation space of each pouch and the area which should be the first unsealed area. Thereafter, a plurality of pouches were produced by cutting the heat-sealed portion according to the shape of each pouch. The prepared pouch was filled with 100 grams of water as a content, and then the upper edge and the vicinity of the overlapped main surface sheet were heat sealed to seal the pouch. Thus, the pouches according to Examples 1 to 4 were produced.

  The dimensions of each part of the manufactured pouches according to Examples 1 to 4 were as shown in FIG. For each of the pouches according to Examples 1 to 4, the values of W1 to W3, L3 and L6 shown in FIG.

(Comparative example)
The pouches according to Comparative Examples 1 to 3 correspond to the pouches according to Examples 1 to 4 in which the dimensions of W1 to W3, L3 and L6 are changed, and the dimensions of the other parts are made the same. . Therefore, the pouches according to Comparative Examples 1 to 3 were manufactured using the same material as the pouches according to Examples 1 to 4 by the same manufacturing method as the pouches according to Examples 1 to 4. For each of the pouches according to Comparative Examples 1 to 3, the values of W1 to W3, L3 and L6 shown in FIG. 8 were as shown in Table 1.

(Evaluation of steam removal function)
The evaluation result which evaluated the steam extraction function is shown in Table 1 about the pouch which concerns on Examples 1-4 and Comparative Examples 1-3 which were obtained above. The evaluation of the vapor removal function is performed by placing each sealed pouch in a microwave oven and warming with 600 W for 2 minutes, visually checking whether vapor escapes from the first unsealed area during heating, and peeling off the sealed area after heating It did by inspecting about the existence of occurrence. In the column of evaluation results of the steam extraction function in Table 1, it is possible to confirm the escape of steam from the first unsealed area during heating, and only the overhanging part of the sealing area after heating is peeled off, and other than the overhanging part The case where generation | occurrence | production of peeling was not confirmed in the area | region was made into O. On the other hand, the case where it was not possible to confirm the escape of the vapor from the first unsealed region during heating, or the case where occurrence of peeling was confirmed in the region of the seal region after heating other than the overhang portion was evaluated as x.

  In the pouches according to Examples 1 to 4, steam was released from the first unsealed area while being warmed by the microwave oven. After heating, it was examined as to whether or not peeling occurred in the seal area. As a result, only the overhanging part of the seal area was peeled off, and the occurrence of peeling was not confirmed in the area other than the overhanging part. In addition, immediately after the heating was completed, when the second outer edge seal portion where the notch was formed was pinched with a finger, it did not feel excessive heat.

  On the other hand, in the pouches according to Comparative Examples 1 to 3, after the heating, when the presence or absence of the peeling of the seal area was inspected, the generation of the peeling was confirmed in the area other than the overhang part in the seal area. For this reason, since the pouch which concerns on Comparative Examples 1-3 is not suitable for the use as a pouch for microwave ovens, it became x as evaluation of a steam extraction function.

Second Embodiment
As described below, pouches according to Example 5 and Comparative Example 4 were produced, and leakage resistance of the contents was evaluated.

(Example)
Example 5 corresponds to the pouch of the standing type shown in FIG.

The pouch concerning Example 5 was produced like the pouch concerning the above-mentioned Examples 1-4.
However, the pouch according to Example 5 contained 150 grams of water as a content. The dimensions of each part of the manufactured pouch according to Example 5 were as shown in FIG. In FIG. 9, W1 was set to 3 mm, W2 was set to 6 mm, W3 was set to 8 mm, L3 was set to 12 mm, and L6 was set to 9 mm.

(Comparative example)
The pouch according to Comparative Example 4 is a pouch having a conventional steam releasing mechanism, and its specific shape is shown in FIG. In order to produce the pouch shown in FIG. 10, first, a body sheet to be formed into a body portion and a bottom sheet to be formed into a bottom portion are disposed at a predetermined position, and a bag is formed out of these sheets The area to be the sealing area of each pouch was heat sealed. Next, a part of the pair of main surface sheets was further heat-sealed in an annular shape to form a point seal portion. Subsequently, a steam venting hole was opened in a portion surrounded by the point seal portion. Thereafter, a plurality of pouches were produced by cutting the heat-sealed portion according to the shape of each pouch. After filling the produced pouch with 150 grams of water as a content, the upper edge and the vicinity of the overlapped main surface sheet were heat sealed to seal the pouch. In addition, the pouch which concerns on the comparative example 4 was produced using the material same as the pouch which concerns on Example 5, and the dimension of each part was as showing in FIG.

(Evaluation of leakage difficulty of contents)
The leak resistance of the contents of the pouches according to Example 5 and Comparative Example 4 obtained above was evaluated. Specifically, first, each sealed pouch was placed in a microwave oven (manufactured by Tiger, model number KRJ-A100), and heated at 600 W for 2 minutes. At this time, in the pouch according to Example 5, peeling of the pair of main surface sheets from the overhanging part occurred and it was visually confirmed that the vapor escapes from the first unsealed region. In the pouch according to Comparative Example 4, peeling of the pair of main surface sheets from the point seal portion occurred, and it was visually confirmed that the steam escapes from the steam vent.

  Next, the pouch was inclined so that the extension direction of the side seal area was inclined at 40 ° to 50 ° with respect to the vertical direction within 30 seconds after warming with a microwave oven. The state which inclined the pouch based on Example 5 in this way in FIG. 11 is shown in figure as a reference. In the pouch shown in FIG. 9 and FIG. 10, when the pouch is inclined by 40 ° to 50 °, the side seal area on the side on which the imaginary plane corresponding to the liquid level of water in the pouch is provided with an overhang or point seal And the upper seal area through the connection point. Next, the pouch was maintained in an inclined state for 30 seconds, and leakage of the contents from the first unsealed area or the steam vent was visually confirmed. Then, the operation of tilting the pouch and visually checking for leakage of the contents was repeated three times.

The evaluation result which evaluated the leak of the contents about the pouch which concerns on Example 5 and Comparative Example 4 is shown in Table 2. In Table 2, when the content leaks less than 5 grams from the opening or the vapor vent formed in the first unsealed area, it is marked with ○, and the content from the opening or the vapor vented in the first unsealed area It was marked as x when the object leaked more than 5 grams. In Table 1, the weight of the contents leaked from the opening or the vapor venting hole formed in the first unsealed area in each work to confirm the leak of the contents is a so-called electronic balance (manufactured by A & D Co., model No. FX) The result measured at -320) is shown for reference.

  As shown in Table 1, in the pouch according to Example 5, after heating, when the pouch was inclined and leakage of contents was visually confirmed, only a few grams from the opening formed in the first unsealed area were used. No leak was found. On the other hand, in the pouch according to Comparative Example 4, after heating, the pouch was inclined and leakage of contents was visually confirmed. As a result, leakage of contents intermittently was confirmed from the vapor vent holes.

  From the above evaluation results, it was found that the pouch according to Example 5 is less likely to leak the contents than the pouch according to Comparative Example 4. In particular, after heating in a microwave oven, the pouch becomes hot and difficult to handle by hand. For this reason, when taking out the pouch after heating from a microwave oven and carrying it, the case where the pouch is unintentionally inclined is also assumed from the handling difficulty. According to this embodiment, even if the pouch is unintentionally inclined, the contents hardly leak from the pouch. Therefore, it can be said that the configuration according to the embodiment acts to compensate for the handling difficulty of the pouch after heating.

  In the pouch according to the fifth embodiment, the following can be considered as a factor that prevents the contents from leaking out. After heating in the microwave oven, the first unsealed area is surrounded by the seal area except for a part of the point peeled off due to heating, and a pair of main surfaces forming the first unsealed area The gap between the sheets is quite narrow. Even if the pouch is inclined in this state, the contents flowing into the first unsealed area from within the storage space can not counter the resistance of the first unsealed area and can pass through the first unsealed area. It will be difficult. On the other hand, in the pouch according to Comparative Example 4, when the pouch is heated after being heated in the microwave, the contents in the accommodation space move from the point at which the point seal portion peels to the steam vent hole. At this time, the contents in the storage space reach the steam vent as soon as they pass through the peeled point of the point seal portion, so that it is difficult to receive resistance from the pouch that prevents leakage from the steam vent. That is, since the pouch according to the fifth embodiment functions so that the first unsealed area having a large resistance prevents the contents in the accommodation space from leaking to the outside, the function of preventing the leakage of the contents is effectively achieved. It is considered to be effective.

DESCRIPTION OF SYMBOLS 1 pouch 2 accommodation space 3 peripheral area 5 outer edge 7 notch 10 body 11 main surface sheet 20 bottom 21 bottom sheet 30 laminated film 50 seal area 50 a seal area 50 a outer edge 50 b inner edge 51 side seal area 52 upper seal area 53 lower seal area 54 overhang Part 55 first outer edge seal part 56 second outer edge seal part 57, 58 step difference 60 first unsealed area 61 opening 62 edge 63, 64, 65 first to third edge 70 second unsealed area 71 opening W1 tension Width W2 of the protrusion Width W3 of the first outer edge seal portion Width W4 of the second outer edge seal portion W4 Width L1 to 3 of the seal region of the portion positioned between the second unsealed region and the accommodation space Length of

Claims (9)

What is claimed is: 1. A pouch which is made into a bag by heat-sealing a stacked laminated film, and which has a storage space for storing contents and a surrounding area surrounding the storage space,
The surrounding area is separated from the receiving space by a sealing area including a pair of side sealing areas in which the stacked laminated films are heat sealed along a pair of side edges, and the one side sealing area of the sealing area. The separated laminated film is heat-sealed from the housing space by the first unsealed area which is not heat-sealed and the other side seal area of the sealing area, and the laminated film is heat-sealed. Not having a second unsealed area,
The first unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The second unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The one side seal area of the seal area is a first outer seal portion extending along the one side edge of the pouch to the first unsealed area, and a side opposite to the first outer seal portion A second outer edge sealing portion extending along the one side edge of the pouch to the first unsealed region, and between the first outer edge sealing portion and the second outer edge sealing portion, the first outer edge sealing portion An outer edge seal portion and an overhang portion projecting toward the housing space beyond the second outer edge seal portion;
A pouch, wherein a length of the second unsealed area extending to the containing space side is shorter than a length of the first unsealed area extending to the containing space side. What is claimed is: 1. A pouch which is made into a bag by heat-sealing a stacked laminated film, and which has a storage space for storing contents and a surrounding area surrounding the storage space,
The surrounding area is separated from the receiving space by a sealing area including a pair of side sealing areas in which the stacked laminated films are heat sealed along a pair of side edges, and the one side sealing area of the sealing area. The separated laminated film is heat-sealed from the housing space by the first unsealed area which is not heat-sealed and the other side seal area of the sealing area, and the laminated film is heat-sealed. Not having a second unsealed area,
The first unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The second unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The one side seal area of the seal area is a first outer seal portion extending along the one side edge of the pouch to the first unsealed area, and a side opposite to the first outer seal portion A second outer edge sealing portion extending along the one side edge of the pouch to the first unsealed region, and between the first outer edge sealing portion and the second outer edge sealing portion, the first outer edge sealing portion An outer edge seal portion and an overhang portion projecting toward the housing space beyond the second outer edge seal portion;
The other side seal area includes an inner edge extending linearly from a position between the second unsealed area and the receiving space to an upper portion of the pouch. What is claimed is: 1. A pouch which is made into a bag by heat-sealing a stacked laminated film, and which has a storage space for storing contents and a surrounding area surrounding the storage space,
The surrounding area is separated from the receiving space by a sealing area including a pair of side sealing areas in which the stacked laminated films are heat sealed along a pair of side edges, and the one side sealing area of the sealing area. The separated laminated film is heat-sealed from the housing space by the first unsealed area which is not heat-sealed and the other side seal area of the sealing area, and the laminated film is heat-sealed. Not having a second unsealed area,
The first unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The second unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The one side seal area of the seal area is a first outer seal portion extending along the one side edge of the pouch to the first unsealed area, and a side opposite to the first outer seal portion A second outer edge sealing portion extending along the one side edge of the pouch to the first unsealed region, and between the first outer edge sealing portion and the second outer edge sealing portion, the first outer edge sealing portion An outer edge seal portion and an overhang portion projecting toward the housing space beyond the second outer edge seal portion;
The first unsealed area extends from the position of the inner edge of the first outer edge seal portion of the one side seal area to the receiving space side.
The pouch according to claim 1, wherein the second unsealed area does not extend further to the receiving space than a position of an inner edge of the other side seal area.   The pouch according to claim 2 or 3, wherein a length of the second unsealed area extending to the containing space side is shorter than a length of the first unsealed area extending to the containing space side. The edge of the first unsealed area is a first edge and a second edge extending from the periphery of the opening toward the accommodation space, a tip of the first edge and a tip of the second edge And a third edge extending between
The first outer edge seal portion extends along the one side edge of the pouch to the first edge of the first unsealed area;
5. The pouch according to any of the preceding claims, wherein the second outer edge seal portion extends along the one side edge of the pouch to the second edge of the first unsealed area.   The pouch according to claim 5, wherein the overhanging portion is at least adjacent to a portion of the first edge and the third edge.   The pouch according to any one of claims 1 to 6, wherein a width of the overhang portion is narrower than a width of the first outer edge seal portion. The width of the overhang portion is narrower than the width of the first outer edge seal portion,
The pouch according to claim 5 or 6, wherein a width of the overhanging portion is a width of a portion of the overhanging portion adjacent to the third edge. A method of manufacturing a pouch which is made into a bag by heat sealing the stacked laminated film, and which has a storage space for storing the contents and a surrounding area surrounding the storage space,
The surrounding area is separated from the receiving space by a sealing area including a pair of side sealing areas in which the stacked laminated films are heat sealed along a pair of side edges, and the one side sealing area of the sealing area. The separated laminated film is heat-sealed from the housing space by the first unsealed area which is not heat-sealed and the other side seal area of the sealing area, and the laminated film is heat-sealed. Not having a second unsealed area,
The first unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The second unsealed area is formed with an opening defined by the edge of the stacked laminated film,
The one side seal area of the seal area is a first outer seal portion extending along the one side edge of the pouch to the first unsealed area, and a side opposite to the first outer seal portion A second outer edge sealing portion extending along the one side edge of the pouch to the first unsealed region, and between the first outer edge sealing portion and the second outer edge sealing portion, the first outer edge sealing portion An outer edge seal portion and an overhang portion projecting toward the housing space beyond the second outer edge seal portion;
The manufacturing method is
Preparing a laminated film to which a plurality of the pouches can be allocated;
The laminated film is heat sealed to obtain the laminated film,
A heat sealed area comprising the area to be one of the side seal area and the other side seal area;
The first unsealed area and the second unsealed area surrounded by the heat-sealed area and the area to be the accommodation space, which are sandwiched between the two heat-sealed areas adjacent in the lateral direction An area that has not been heat sealed, including an area to be an area;
Partitioning into
The laminated film is cut, and the heat sealing area, which is to be one of the side seal area and the other side seal area, of the heat sealed areas is one of the side seal areas and The first unsealed area and the second unsealed area are divided into the other side seal area and not heat-sealed, and the first unsealed area and the second unsealed area are the first unsealed area and the second unsealed area. And 2. a cutting step of dividing into two unsealed areas.

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