JP6579879B2 - Packaging materials for pouch containers and pouch containers - Google Patents

Description

  The present invention relates to a packaging material for a pouch container and a pouch container using the same.

  Pouch containers are widely used as containers for beverages such as sports drinks and foods such as ice cream and jelly. Patent Document 1 discloses an example of a conventional pouch container. FIG. 19 shows a packaging material for manufacturing the pouch container disclosed in Patent Document 1. The packaging material X shown in the figure includes a pair of exterior films 91, a pair of gusset films 92, and a spout 93.

  The pair of exterior films 91 are disposed on the front side and the back side. The pair of gusset films 92 constitutes a pair of side surface portions 921 and has a center side folded portion 922. The pair of gusset films 92 are positioned between the pair of exterior films 91 in a state where each of the gusset films 92 is folded.

  The packaging material X has a top side central seal portion 941, a top side seal portion 942, a side seal portion 943, and a ground side seal portion 944 so that the contents such as the beverage and the food can be contained in a sealed state. Is formed. The top-side center seal portion 941 is formed by joining the top-side end portions of the pair of exterior films 91 with each other with the spout 93 sandwiched therebetween. The top side seal portion 942 is formed by joining the top end portions of the pair of exterior films 91 and the top end portions of the pair of gusset films 92 together. The side seal portion 943 is formed by joining the side end portions of the pair of exterior films 91 and the side end portions of the pair of gusset films 92. The ground side seal portion 944 is formed by joining the ground side end portions of the pair of exterior films 91 together.

  FIG. 20 shows an example of a pouch container in which the packaging material X is used. In the illustrated pouch container Y, the storage space of the packaging material X is filled with the beverage or the food. By this filling, the packaging material X has a swollen shape as illustrated. Since the ground-side seal portion 944 is a portion where the ground-side end portions of the pair of exterior films 91 are joined together, the ground-side seal portion 944 has relatively high rigidity. For this reason, in the pouch container Y, the ground side seal portion 944 tends to protrude to the ground side. When the pouch container Y is made to stand on a store shelf or the like, there is a problem that the protruding ground side seal portion 944 makes the pouch container Y independent.

JP 2004-196414 A

  The present invention has been conceived under the circumstances described above, and provides a packaging material and a pouch container for a pouch container that can be more stably self-supporting while maintaining the sealing property of the accommodation space. The issue is to provide.

A packaging material for a pouch container provided by the first aspect of the present invention includes a pair of main surface portions located on the front side and the back side, and a pair of disposed on both sides in the width direction between the pair of main surface portions. A packaging material for a pouch container having a storage space defined by the pair of main surface portions and the pair of side surface portions, wherein the pair of main surface portions are perpendicular to the width direction. In the top-to-bottom direction, the pair of main surface portions is constituted by one exterior film in which a ground-side folded portion serving as a ground-side edge is formed, and the pair of side surface portions is a center formed along the top-and-bottom direction A pair of gusset films each having a side turn portion, a side seal portion in which a side end portion of the pair of main surface portions and a side end portion of the pair of side surface portions are joined, and the ground side turn back Across the non-bonded area Anda pair of ground-side seal portion formed apart from each other on both sides in the width direction, the pair of ground-side seal portion is positioned in the width direction inside than the center-side folded portion A path from the housing space to the outside is sealed on both sides in the width direction of the non-joining region.

  In a preferred embodiment of the present invention, the ground side seal portion is a first joint in which a portion of the main surface portion and at least a portion of the ground side end portion of the side surface portion are joined and connected to the side seal portion. A region, a second joint region where the portions between the ground-side folded portion and the side surface portion of the pair of main surface portions are joined to each other, the second joint region, and the pair of main surface portions. And a third joining region in which portions located on the inner side in the width direction with respect to the center side folded portion in the side surface part are joined.

  In a preferred embodiment of the present invention, both sides in the width direction of the non-joining region are located on the outer side in the width direction than the center side folded portion.

  In a preferred embodiment of the present invention, the ground side seal portion is a first joint in which a portion of the main surface portion and at least a portion of the ground side end portion of the side surface portion are joined and connected to the side seal portion. A region, a second joining region in which portions between the ground-side folded portion and the side surface portion of the pair of main surface portions are joined, and, of the side surface portions, the center side of the ground-side end portion A fourth region in which portions including a portion in contact with the folded portion are joined to each other, and the second joined region is located on the outer side in the width direction than the central folded portion in the side surface portion.

  The pouch container provided by the second aspect of the present invention comprises the packaging material for the pouch container provided by the first aspect of the present invention and the contents accommodated in the accommodation space. It is said.

  According to the present invention, the non-joining region located near the center of the ground-side folded portion is a non-joining region that is not heat-sealed. For this reason, when the contents are filled in the accommodation space in the pouch container, the non-joining region is expanded into a flat shape. Thereby, the said pouch container can be made to stand by a display shelf etc. stably in a shop front. Further, the path through which the contents can leak from the ground side portion of the housing space to the outside is sealed by the pair of ground side seal portions. Therefore, the pouch container can be made more stable and independent while maintaining the sealing property of the accommodation space.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a front view which shows the packaging material for pouch containers based on 1st Embodiment of this invention. It is sectional drawing which follows the II-II line | wire of FIG. It is a principal part enlarged front view which shows the packaging material for pouch containers of FIG. It is a principal part expanded sectional view in alignment with the IV-IV line of FIG. It is a principal part expanded sectional view in alignment with the VV line of FIG. It is a principal part expanded sectional view which follows the VI-VI line of FIG. It is a principal part expanded sectional view which follows the VII-VII line of FIG. It is a principal part expanded sectional view which follows the VIII-VIII line of FIG. It is a principal part enlarged front view which shows the modification of the packaging material for pouch containers of FIG. It is a perspective view which shows an example of the manufacturing method of the packaging material for pouch containers of FIG. It is a perspective view which shows the pouch container using the packaging material for pouch containers of FIG. It is sectional drawing which follows the XI-XI line of FIG. It is a principal part expanded sectional view which shows the packaging material for pouch containers based on 2nd Embodiment of this invention. It is a principal part expanded sectional view which follows the XIV-XIV line | wire of FIG. It is a principal part expanded sectional view which follows the XV-XV line | wire of FIG. It is a principal part expanded sectional view which follows the XVI-XVI line of FIG. It is a principal part expanded sectional view which follows the XVII-XVII line of FIG. It is a principal part expanded sectional view which follows the XVIII-XVIII line of FIG. It is a front view which shows an example of the packaging material for conventional pouch containers. It is a perspective view which shows the pouch container using the packaging material for pouch containers of FIG.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings. With the pouch container filled with contents self-supporting at the storefront, the purchaser side is the front side, the opposite side is the back side, and the top side in the top-to-bottom direction that matches the vertical direction is the top side and the bottom side is the ground side. Side. Also, the direction perpendicular to the top and bottom direction and perpendicular to the front and back directions is defined as the width direction. About each film, let the surface exposed outside in the state of a pouch container be the surface, and let the surface on the opposite side be a back surface.

  FIGS. 1-8 has shown the packaging material for pouch containers based on 1st Embodiment of this invention. The packaging material A1 of the present embodiment includes an exterior film 1, a pair of gusset films 2, and a spout 3, and includes a top side central seal part 411, a pair of top side seal parts 412, and four side seal parts 42. And a pair of ground side seal part 43 is formed.

  FIG. 1 is a front view showing the packaging material A1. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is an enlarged front view of a main part showing the packaging material A1. FIG. 4 is an enlarged cross-sectional view of a main part taken along line IV-IV in FIG. FIG. 5 is an enlarged cross-sectional view of a main part taken along line VV in FIG. 6 is an enlarged cross-sectional view of a main part taken along line VI-VI in FIG. FIG. 7 is an enlarged cross-sectional view of a main part taken along line VII-VII in FIG. FIG. 8 is an enlarged cross-sectional view of a main part taken along line VIII-VIII in FIG. In these drawings, for convenience of understanding, the top center seal portion 411, the four top side seal portions 412, the four side seal portions 42, and the pair of ground side seal portions 43 are hatched.

  The pair of main surface portions 11 is composed of a single exterior film 1 that is folded back by the ground-side folded portion 12. A pair of main surface parts 11 are arrange | positioned at the front side and the back side on both sides of the spout 3 on the top side. In this embodiment, each main surface part 11 is substantially hexagonal when viewed from the front. The ground-side folded portion 12 extends along the width direction, and connects the ground-side end portions of the pair of main surface portions 11. The ground side folded portion 12 is a ground side edge of the pair of main surface portions 11. The exterior film 1 is folded at the ground-side folded portion 12 so that the pair of main surface portions 11 overlap each other.

  The pair of side surface portions 21 are disposed so as to be separated on both sides in the width direction between the pair of main surface portions 11. Each of the pair of side surface portions 21 is made of a gusset film 2 and has a center side folded portion 22. The side surface portion 21 is folded at the center side folded portion 22. In the present embodiment, the side surface portion 21 in a folded state has a substantially pentagonal shape when viewed from the front. The center-side folded portion 22 extends along the top-and-bottom direction, and serves as a center edge in the width direction of the pair of side surface portions 21. Further, the gusset film 2 has a notch 25 formed at the outer end in the width direction on the top side.

  The accommodation space 5 is a space mainly for beverages, foods, and the like as contents, and is defined by a pair of main surface portions 11 and a pair of side surface portions 21.

  The pair of exterior films 1 and the pair of gusset films 2 constituting each surface portion are usually composed of a resin film. The resin film is required to have basic performance as a package, such as impact resistance, wear resistance, and heat resistance. Moreover, since each said seal | sticker part is normally formed by heat seal, heat seal property is also requested | required of the resin film. As the resin film, a multilayer sheet having a base film layer and a sealant layer that imparts heat sealability is suitable. When high gas barrier properties and light shielding properties are required, the base film layer and the sealant layer It is preferable to provide a barrier layer between them. In addition, you may provide barrier property to the base film layer itself. In this case, a multilayer sheet having a barrier layer and a sealant layer is obtained using the barrier layer as a base film layer.

  Here, constituent materials of the base film layer, the sealant layer, and the gas barrier layer are exemplified. In addition, lamination | stacking of these each layer can be performed by the conventional lamination method, for example, the co-extrusion lamination, the dry lamination by an adhesive agent, the heat lamination which adhere | attaches with a heat | fever by pinching | interposing a heat adhesive layer.

  As the film constituting the base film layer, polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polycarbonate (PC), etc.), polyolefin (polyethylene (PE), polypropylene ( PP) etc.), polyamide (nylon-6, nylon-66 etc.), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polymethyl methacrylate (PMMA), poly A stretched or unstretched film of one layer or two or more layers composed of ether sulfone (PES) or the like can be exemplified.

  The films constituting the sealant layer include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene-propylene copolymer (EP), unstretched polypropylene (CPP), and biaxially stretched nylon (ON). , Ethylene-olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-vinyl acetate copolymer (EVA), etc. The stretched or unstretched film can be exemplified.

  The gas barrier layer may be a metal thin film such as aluminum, a resin film such as vinylidene chloride (PVDC) or ethylene-vinyl alcohol copolymer (EVOH), or any synthetic resin film (for example, a base film layer). ), And a film obtained by vapor-depositing (or sputtering) an inorganic oxide such as aluminum, aluminum oxide, or silica.

  The exterior film 1 and the pair of gusset films 2 may be provided with a printed layer (not shown) for displaying the product name of the contents, product description such as raw materials and precautions, and other various designs. it can. For example, the printing layer can be formed on the inner surface of the base film layer by a known method such as gravure printing.

  In this embodiment, when the sealant layer which has heat-sealing property is provided in the back surface of the exterior film 1 and a pair of gusset film 2, and the layer which does not have heat-sealing property, such as a base film layer, is provided in the surface Will be described as an example.

  The spout 3 constitutes a path for filling and dispensing contents, and is a member made of, for example, resin. The spout 3 of this example has a main body 31 and a cap 32. The main body 31 is a member having a cylindrical hollow portion, and constitutes a path connecting the accommodation space 5 and the outside. The cap 32 is for sealing the main body 31 by screwing into the main body 31. As will be described later, the spout 3 is fixed to the pair of exterior films 1 by being sandwiched and hermetically bonded at the top center seal portion 411 as will be described later.

  The top side center seal part 411 is formed by joining the center part of the top end parts of the pair of main surface parts 11 by heat sealing. The top side center seal part 411 is located between the pair of gusset films 2 in the width direction. Moreover, in this embodiment, the top side center seal | sticker part 411 has pinched the spout 3 in the center. The top end portions of the pair of main surface portions 11 and the spout 3 are joined in a sealed state by heat sealing or the like.

  The top side seal part 412 is formed by joining the side part of the top side end part of the main surface part 11 and the top side end part of the side part 21 by heat sealing. In the present embodiment, four top side seal portions 412 are formed by the pair of main surface portions 11 and the pair of side surface portions 21.

  The side seal portion 42 is formed by joining the side end portion of the main surface portion 11 and the side end portion of the side surface portion 21 by heat sealing, and extends in the vertical direction. In the present embodiment, four side seal portions 42 are formed by the pair of main surface portions 11 and the pair of side surface portions 21.

  In the present embodiment, two shoulder joints 45 are formed in the packaging material A1. The shoulder joint portion 45 is formed by joining the back surfaces of the intersections between the top end portion and the side end portion of the pair of main surface portions 11 through heat-sealing through the notch 25 of the side surface portion 21.

  A pair of ground side seal | sticker part 43 is provided in the ground side part of packaging material A1, and is mutually spaced apart and arrange | positioned at the both sides in the width direction. As shown in FIG. 3, the pair of ground side seal portions 43 seals the path from the accommodation space 5 to the outside on both sides in the width direction of the non-joining region 121. This route includes routes P1 and P2. The path P1 is a path that extends from the accommodation space 5 to the outside through the space between the ground-side folded portion 12 and the ground-side end portion 211 of the side surface portion 21. The path P <b> 2 is a path that intersects the ground-side end portion 211 of the side surface portion 21 from the accommodation space 5 and reaches the space outside the side surface portion 21.

  In the present embodiment, the ground side seal portion 43 includes two first joining regions 431, a second joining region 432, and a third joining region 433. In FIG. 3, the first joint region 431 is hatched with a hatched line extending from the upper left to the lower right, and the second joint region 432 is hatched with a hatched line extending from the upper right to the lower left. In addition, the third bonding region 433 is hatched with a narrower line interval than the hatching attached to the first bonding region 431.

  As shown in FIGS. 3 and 5 to 7, in the first bonding region 431, a part of the main surface portion 11 and a portion including at least a part of the ground side end portion of the side surface portion 21 are bonded by heat sealing. It is connected to the side seal portion 42. In the present embodiment, the first bonding region 431 is formed by bonding a part of the main surface portion 11 and a portion including all of the ground side end portions 211 of the side surface portion 21. One ground side seal portion 43 includes two first joining regions 431 located on the front side and the back side. In the present embodiment, as shown in FIG. 1, the main surface portion 11 and the side surface portion 21 have a shape in which the width direction outer side portion of the ground side end portion is inclined with respect to the top and bottom direction and the width direction in the front view. Has been. Accordingly, the first bonding region 431 has a shape inclined with respect to the top and bottom direction and the width direction.

  As shown in FIGS. 3, 5, and 8, in the second bonding region 432, portions of the pair of main surface portions 11 between the ground-side folded portion 12 and the side surface portion 21 are bonded by heat sealing. Is. The second bonding region 432 is connected to the first bonding region 431 at the ground side end portion 211 of the side surface portion 21. In the present embodiment, the second bonding region 432 is provided over a region in contact with the entire length of the ground-side end portion 211 of the side surface portion 21. Further, the second bonding region 432 is provided over a region in contact with all portions of the ground side folded portion 12 that are located on the outer side in the width direction with respect to the central folded portion 22. The second bonding region 432 may have any structure that can fulfill the function of complementing and sealing the path P1 and the path P2 described later to the third bonding area 433 described below. Thus, it may be provided in a region in contact with a part of the ground side end part 211 or a part of the ground side folded part 12.

  The third joint region 433 is formed by joining the portions located on the center side in the width direction of the pair of main surface portions 11 with respect to the center side folded portion 22 by heat sealing. The third bonding region 433 is connected to the second bonding region 432. The third bonding region 433 is connected to the first bonding region 431. The third joint region 433 of the present embodiment is provided in a region in contact with a portion connected to the second joint region 432 in the ground-side folded portion 12. The top edge of the third joint region 433 is continuous with the top edge of the first joint region 431 and is inclined with respect to the top and bottom direction and the width direction. Furthermore, in the corner | angular part which the center side folding | returning part 22 and the ground side edge part 211 connect, it becomes the structure which the 1st junction area | region 431, the 2nd junction area | region 432, and the 3rd junction area | region 433 connect mutually without a gap.

  As for the ground side folding | returning part 12, the part of the width direction both sides is contained in a pair of ground side seal part 43, and a pair of main surface parts 11 are joined by the sheet sheet on both sides of this part. On the other hand, a portion of the ground-side folded portion 12 sandwiched between the pair of ground-side seal portions 43 is not in contact with any of the seal portions, and the pair of main surface portions 11 are not joined to each other across this portion. . The portion of the ground-side folded portion 12 that is not joined is defined as a non-joined region 121.

  Due to the configuration of the pair of ground side seal portions 43 described above, the path from the accommodation space 5 to the outside is sealed by the ground side seal portion 43. The route includes a route P1 and a route P2. The path P1 is a path from the housing space 5 to the outside outside in the width direction with respect to the packaging material A1 through the space between the ground-side folded portion 12 and the ground-side end portion 211 of the side surface portion 21. The path P <b> 2 is a path that passes from the accommodation space 5 between the ground-side folded portion 12 and the side surface portion 21, intersects the ground-side end portion 211, and reaches the space outside the side surface portion 21. In the present embodiment, the path P1 is sealed mainly by forming the third bonding region 433 and the second bonding region 432.

  In this embodiment, when the 3rd junction area | region 433 is connected with the 1st junction area | region 431, especially the corner | angular part which the center side folding | returning part 22 and the ground side edge part 211 of the gusset film 2 connect is sealed. ing. Thereby, the path | route which reaches the space outside the side part 21 through the corner | angular part which the center side folding | returning part 22 and the ground side edge part 211 of the gusset film 2 connect is fundamentally sealed. In addition to this, the second joint region 432 is formed and connected to the third joint region 433, so that the storage space 5 passes between the ground-side folded portion 12 and the ground-side end portion 211 of the side surface portion 21. The path P1 leading to the outside outside in the width direction with respect to the packaging material A1 is securely sealed. Furthermore, since the first bonding region 431 and the second bonding region 432 are connected, a portion near the ground side end portion 211 of the side surface portion 21 is bonded to the main surface portion 11. As a result, the path P <b> 2 that crosses the ground side end portion 211 and reaches the space outside the side surface portion 21 from between the ground side folded portion 12 and the ground side end portion 211 of the side surface portion 21 is reliably sealed. Has been. As described above, the path from the accommodation space 5 to the outside is sealed by the ground side seal portion 43.

  FIG. 10 shows an example of a method for manufacturing the packaging material A1. In this manufacturing method, a plurality of intermediate products, each of which becomes the packaging material A1, are sequentially manufactured using the film material 10 and the film material 20. The film material 10 is a material that becomes the exterior film 1 in the packaging material A1, and is supplied while a wide belt-like material is folded at the center in the width direction. The folded portion becomes the ground side folded portion 12 in the exterior film 1. The surface facing inward of the folded film material 10 is a surface that becomes the back surface of the exterior film 1, and has heat sealability by providing the above-described sealant layer. The surface facing the outside of the film material 10 is a surface that becomes the surface of the exterior film 1 and does not have heat sealability.

  The film material 20 is a material that becomes the gusset film 2 in the packaging material A1. In the illustrated example, the film material 20 is a material that has a shape similar to a cylindrical shape that opens up and down by abutting or adjoining side end edges, and one film material 20 includes two film materials 20. Two gusset films 2 are obtained. The film material 20 is used for manufacturing the packaging material A1 in a folded state. The folded portion becomes the center-side folded portion 22 in the gusset film 2 and has a relationship in which the pair of side surface portions 21 are overlapped. In addition, an opening 25 ′ is formed in the film material 20. The opening 25 ′ is a notch 25 in the gusset film 2. The surface facing the outside of the film material 20 is a surface that becomes the back surface of the gusset film 2 and has heat sealability by providing the above-described sealant layer. The surface facing the inner side of the film material 20 is a surface that becomes the surface of the gusset film 2 and does not have heat sealability.

  The film material 20 is sequentially inserted into the folded film material 10 while the film material 10 is conveyed from right to left in the drawing. At this time, the ground side end portion 211 is brought close to the ground side folded portion 12. Next, in the drawing, heat sealing is applied to the hatched region. Thereby, the side seal part 42 and the ground side seal part 43 are formed. Further, through the opening 25 ′ of the film material 20, portions of the film material 10 that are to become the pair of main surface portions 11 in the exterior film 1 are joined. This joint portion becomes the shoulder joint portion 45. After finishing this heat sealing, the film material 10 and the film material 20 are cut together to obtain an intermediate product to be the packaging material A1. Thereafter, heat sealing is performed with the spout 3 inserted into the intermediate product, thereby forming the top side central seal portion 411 and the top side seal portion 412, thereby obtaining the packaging material A1.

  11 and 12 show an example of a pouch container manufactured using the packaging material A1. FIG. 11 is a perspective view of the pouch container B1 as seen from the ground side. 12 is a cross-sectional view taken along line XI-XI in FIG. The pouch container B1 shown in the figure is configured such that the accommodation space 5 of the packaging material A1 is filled with the contents 6. The contents 6 are the beverages and foods described above, and are filled from the main body 31 to which the cap 32 is not yet attached. After the contents 6 are filled, the storage space 5 is sealed with the spout 3 by screwing the cap 32 onto the main body 31. Further, when the contents 6 are filled with the accommodation space 5, the pair of main surface portions 11 and the pair of side surface portions 21 that define the accommodation space 5 expand as illustrated. In this state, the non-bonded region 121 of the ground-side folded portion 12 of the exterior film 1 is a portion that is not bonded at all, and thus is expanded into a flat shape.

  Next, the operation of the packaging material A1 and the pouch container B1 will be described.

  According to this embodiment, the non-joining area | region 121 located near the center of the ground side folding | turning part 12 is made into the non-joining area | region where heat seal etc. are not given. For this reason, when the contents 6 are filled in the storage space 5 in the pouch container B1, the non-joining region 121 is expanded into a flat shape as shown in FIGS. Thereby, the pouch container B1 can be made to stand by itself stably with a display shelf etc. in a shop front. Further, a path P1 and a path P2 that are paths through which the contents 6 can leak from the ground side portion of the accommodation space 5 to the outside are sealed by a pair of ground side seal portions 43. Therefore, according to the packaging material A1 and the pouch container B1, the airtightness of the accommodation space 5 can be maintained, and it can be made to stand more stably.

  As shown in FIG. 3 and the like, the angle at which the central folded portion 22 of the gusset film 2 and the ground side end portion 211 are connected from the accommodation space 5 by connecting the third bonding region 433 to the first bonding region 431. The path leading to the space outside the side surface portion 21 through the portion is basically sealed. In addition to this, the second joint region 432 is formed and connected to the third joint region 433, so that the storage space 5 passes between the ground-side folded portion 12 and the ground-side end portion 211 of the side surface portion 21. The path P1 leading to the outside outside in the width direction with respect to the packaging material A1 is securely sealed. Further, since the first joint region 431 and the second joint region 432 are connected, the ground side end portion 211 intersects with the ground side end portion 211 of the side surface portion 21 with the ground side folded portion 12. Thus, the path P2 leading to the space outside the side surface portion 21 is securely sealed. As described above, the ground-side seal portion 43 can seal the path from the accommodation space 5 to the outside. However, in the present embodiment, the top edge of the third bonding region 433 is continuously inclined with the top edge of the first bonding region 431, and the third bonding region 433 itself is the first bonding region 431. In addition, the area is smaller than that of the second bonding area 432. Thereby, while ensuring the sealing function by the ground side seal | sticker part 43, it can avoid that the non-joining area | region 121 of the ground side folding | turning part 12 becomes unduly short, and can ensure the self-supporting property of the pouch container B1. .

  Since the first bonding region 431 and the second bonding region 432 are provided in the region that is in contact with the entire length of the ground-side end portion 211 of the side surface portion 21, the path P1 and the path P2 can be sealed more reliably. . In addition, if it is the structure which can seal | block the path | route P1 and the path | route P2, the 1st junction area | region 431 and the 2nd junction area | region 432 are formed in the area | region which touches a part of the width direction outer side of the ground side edge part 211, for example. There may be no configuration.

  13 to 18 show another embodiment of the present invention. In these drawings, the same or similar elements as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment.

  FIGS. 13-18 has shown the packaging material for pouch containers based on 2nd Embodiment of this invention. The packaging material A2 of the present embodiment is different from the above-described embodiment in the configuration of the pair of ground side seal portions 43 and the configuration of the pair of gusset films 2.

  FIG. 13: is a principal part expanded sectional view which shows the packaging material for pouch containers based on 2nd Embodiment of this invention. 14 is an enlarged cross-sectional view of a main part taken along line XIII-XIII in FIG. 15 is an enlarged cross-sectional view of a main part taken along the line XIV-XIV in FIG. 16 is an enlarged cross-sectional view of a main part taken along line XV-XV in FIG. 17 is an enlarged cross-sectional view of a main part taken along line XVI-XVI in FIG. 18 is an enlarged cross-sectional view of a main part taken along line XVII-XVII in FIG.

  In the present embodiment, the ground side seal portion 43 includes a first bonding region 431, a second bonding region 432, and a fourth bonding region 434. In FIG. 13, the first joint region 431 is hatched with diagonal lines extending from the upper left to the lower right, and the second joint region 432 is hatched with diagonal lines extending from the upper right to the lower left. The fourth joint region 434 is hatched with a plurality of discrete points. In the same figure, in the region where the first bonding region 431 and the fourth bonding region 434 overlap in front view, both the first bonding region 431 and the fourth bonding region 434 are hatched.

  As shown in FIGS. 13 and 15 to 17, the first bonding region 431 is formed by bonding a part of the main surface part 11 and a part of the side surface part 21 including at least a part of the ground side end part by heat sealing. It is connected to the side seal portion 42. In the present embodiment, the first bonding region 431 is formed by bonding a part of the main surface part 11 and a part including a part on the outer side in the width direction of the ground side end part 211 of the side surface part 21. One ground side seal portion 43 includes two first joining regions 431 located on the front side and the back side. Also in this embodiment, the 1st junction area | region 431 becomes a shape inclined with respect to the top and bottom direction and the width direction.

  As shown in FIGS. 13, 15, and 18, in the second bonding region 432, the portions between the ground-side folded portion 12 and the side surface portion 21 of the pair of main surface portions 11 are bonded by heat sealing. Is. The second bonding region 432 is connected to the first bonding region 431 at the ground side end portion 211 of the side surface portion 21. In the present embodiment, the second bonding region 432 is provided over a region in contact with a part of the ground side end portion 211 of the side surface portion 21 on the outer side in the width direction. In addition, the second bonding region 432 is provided in a region excluding the central portion of the ground side folded portion 12 located on the outer side in the width direction than the central folded portion 22. That is, the second bonding region 432 is located on the outer side in the width direction than the central folded portion 22 of the gusset film 2. Further, the top side edge of the second joint region 432 is continuous with the top side edge of the first joint region 431 and is inclined with respect to the top and bottom direction and the width direction.

  As shown in FIG. 13 to FIG. 15 and FIG. 17, the fourth joining region 434 is obtained by joining portions of the side surface portion 21 including a portion in contact with the center side folded portion 22 of the ground side end portion 211. is there. In the present embodiment, a fourth joining region 434 is provided over the entire length of the ground side end portion 211. Such a fourth bonding region 434 is a portion where the surfaces of the gusset film 2 are bonded to each other. In order to form the fourth bonding region 434, for example, a film material having heat sealability on the front and back surfaces is used as the gusset film 2, and the fourth bonding region 434 is formed in advance to seal the ground side end portion 211. The film material 20 made may be used. In this case, the opening 25 'may be present, but it is not necessary to provide it. Then, in the manufacturing method similar to the manufacturing method shown in FIG. 10, when performing heat sealing, a film material 20 is formed by aligning a bar member made of a heat resistant material such as a silicone resin with a position where the side seal portion 42 is formed. To form each seal portion. If it does in this way, each seal part can be formed, without joining the side seal parts 42 which overlap and are located in the straight-back direction. In this case, since a film material having heat sealability is used on the front and back surfaces, the shoulder joint portion 45 is formed by joining the surfaces of the side surface portions 21 without providing the opening 25 ′. Is done. On the other hand, when the same film material 20 as that used for manufacturing the packaging material A1 is used, the fourth bonding region 434 may be formed using an adhesive or the like.

  Also according to the present embodiment, the pouch container manufactured using the packaging material A2 can be made more stable and independent while maintaining the sealing property of the accommodation space 5. In the present embodiment, the path P1 is reliably sealed by the second bonding region 432, and the path P2 can be reliably sealed by forming the fourth bonding region 434. For this reason, it is possible to position the second joining region 432 on the outer side in the width direction than the center side folded portion 22, and the ground side seal portion 43 is a portion located on the center side in the width direction than the center side folded portion 22. Does not have. This is advantageous for enlarging the region to be the non-joined region 121 in the ground side folded portion 12, and it is possible to secure a larger flat bottom suitable for self-supporting in the pouch container using the packaging material A2. There are advantages.

  In addition, the 4th junction area | region 434 should just include the part located in the width direction center side at least rather than the 2nd junction area | region 432 among the ground side edge parts 211 so that the path | route P2 can be sealed. For example, the fourth bonding region 434 may not be formed in a portion of the ground side end portion 211 that overlaps with the second bonding region 432 in the width direction and is located outside.

  The packaging material for pouch containers and the pouch container according to the present invention are not limited to the above-described embodiments. The specific structure of each part of the packaging material for a pouch container and the pouch container according to the present invention can be changed in various ways.

A1, A2 Packaging material B1 Pouch container 1 Exterior film 10 Film material 11 Main surface portion 12 Ground side folded portion 121 Non-bonded region 2 Gusset film 20 Film material 21 Side surface portion 211 Ground side end portion 22 Central side folded portion 25 Notch 25 ′ Opening 3 Spout 31 Main body part 32 Cap 411 Top side center seal part 412 Top side part seal part 42 Side seal part 43 Ground side seal part 431 First joint area 432 Second joint area 433 Third joint area 434 Fourth joint area 45 Shoulder joint 5 Accommodating space 6 Contents P1, P2 Route

Claims (5)

A pair of main surface portions located on the front side and the back side;
A pair of side surface portions disposed on both sides in the width direction between the pair of main surface portions,
In a packaging material for a pouch container provided with an accommodation space defined by the pair of main surface portions and the pair of side surface portions,
The pair of main surface portions is constituted by a single exterior film in which a ground-side folded portion serving as a ground side edge of the pair of main surface portions is formed in a vertical direction perpendicular to the width direction,
The pair of side surface parts is composed of a pair of gusset films each having a center side folded part formed along the top-and-bottom direction,
A side seal portion in which a side end portion of the pair of main surface portions and a side end portion of the pair of side surface portions are joined;
A pair of ground side seal portions formed on both sides in the width direction so as to be separated from each other across the non-joining region of the ground side folded portion,
The pair of ground side seal portions seals a path from the accommodation space to the outside on both sides in the width direction of the non-joining region located on the inner side in the width direction than the center side folded portion. A packaging material for a pouch container. The ground-side seal portion includes a first joint region in which a part of the main surface portion and at least a part of the ground-side end portion of the side surface portion are joined and connected to the side seal portion, and the pair of main surface portions. The second joint region where the portions between the ground side folded portion and the side surface portion are joined, and the second joint region are connected to the second joint region, and the center side folded portion in the side surface portion of the pair of main surface portions. The packaging material for a pouch container according to claim 1 , further comprising: a third joining region in which portions located on the inner side in the width direction are joined to each other. A pair of main surface portions located on the front side and the back side;
A pair of side surface portions disposed on both sides in the width direction between the pair of main surface portions,
In a packaging material for a pouch container provided with an accommodation space defined by the pair of main surface portions and the pair of side surface portions,
The pair of main surface portions is constituted by a single exterior film in which a ground-side folded portion serving as a ground side edge of the pair of main surface portions is formed in a vertical direction perpendicular to the width direction,
The pair of side surface parts is composed of a pair of gusset films each having a center side folded part formed along the top-and-bottom direction,
A side seal portion in which a side end portion of the pair of main surface portions and a side end portion of the pair of side surface portions are joined;
A pair of ground side seal portions formed on both sides in the width direction so as to be separated from each other across the non-joining region of the ground side folded portion,
The pair of ground side seal portions seals a path from the accommodation space to the outside on both sides in the width direction of the non-joining region located on the outer side in the width direction than the center side folded portion. A packaging material for a pouch container. The ground-side seal portion includes a first joint region in which a part of the main surface portion and at least a part of the ground-side end portion of the side surface portion are joined and connected to the side seal portion, and the pair of main surface portions. The second joining region where the portions between the ground side folded portion and the side surface portion are joined together, and the portions including the portions of the side surface portion that are in contact with the central folded portion of the ground side end portion. A joined fourth joining region,
4. The packaging material for a pouch container according to claim 3 , wherein the second joining region is located on the outer side in the width direction with respect to the center side folded portion in the side surface portion. A packaging material for a pouch container according to any one of claims 1 to 4 ,
A pouch container, comprising: a content housed in the housing space.

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