Self-standing bag, film roll and production method of film roll

Abstract

To provide a self-standing bag that is provided with a bottom material provided with notches at both ends in the width direction, and prevents air from entering the gusset sheet that constitutes the bottom material during the manufacturing process.SOLUTION: In a self-standing bag, the bottom material is folded into two partial pieces along the width direction, and notches are provided partially at each end of the width direction of the bottom material. The folded-in inner surfaces of each of the two partial pieces are partially glued together at each end in the width direction.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a stand-up bag, a film roll body, and a method for manufacturing the film roll body.

Background Art

[0002] Conventionally, there has been known a packaging bag (stand-up bag) configured to be self-standing by expanding a bottom material (gusset portion) provided on the lower side. For example, in Patent Document 1 below, notches are provided at both ends in the lateral direction (width direction) of the bottom material, and in such notches, a pair of sheet bodies (front sheet and back sheet) are directly sealed to achieve stable self-standing property and the like. A stand-up bag is disclosed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventors of the present application have found that, for a conventional stand-up bag in which notches are provided at both ends in the width direction of the bottom material as disclosed in Patent Document 1, air may enter the inside of the gusset sheet constituting the bottom material during manufacturing, which may make efficient manufacturing difficult. The above problems found by the inventors of the present application for the conventional stand-up bag will be described in detail below with reference to FIGS. 1 to 4.

[0005] FIG. 1 is a diagram for explaining the outline of a conventional stand-up pouch 99. In particular, FIG. 1(A) schematically illustrates an example of the form seen from one side of the conventional stand-up pouch 99, and FIG. 1(B) shows the outline of the bottom material 97 provided in the stand-up pouch 99. The stand-up pouch 99 includes a pair of sheet bodies (the first sheet body 98 in FIG. 1(A) and a second sheet body not shown) that are arranged to face each other in the thickness direction and are sealed to each other at both ends in the width direction, and a bottom material 97 that is sealed to both of the pair of sheet bodies. The bottom material 97 is formed in a rectangular shape and is arranged so as to be sandwiched between the pair of sheet bodies in the thickness direction on the lower end side in the length direction of the pair of sheet bodies in a state of being folded in half along the width direction with a mountain fold. When the bottom material 97 that has been folded in a mountain fold expands (unfolds), the stand-up pouch 99 can stand on its own. A notch (96A, 96B) is provided in a part of each end in the width direction of the bottom material 97. At the part of this notch (96A, 96B), the pair of sheet bodies described above are directly joined to each other, whereby the stand-up pouch 99 realizes stable self-standing properties.

[0006] As described above, the bottom material 97 is folded in half along the width direction with a mountain fold, and as a result, the bottom material 97 is divided into two partial pieces (the first partial piece 95A and the second partial piece 95B) with the folding line as a boundary, as shown in FIG. 1(B). In the conventional stand-up pouch 99, the surfaces 94 of the first partial piece 95A and the second partial piece 95B that face the inside of the mountain fold are not bonded to each other so that the bottom material 97 that has been folded in a mountain fold can expand.

[0007] FIG. 2 schematically illustrates an example of a film roll body 990 that can be used to produce a conventional stand-up pouch 99. The film roll body 990 is configured such that a plurality of conventional stand-up pouches 99 are continuously provided in the length direction and wound in the length direction. The length direction corresponds to the feeding and winding directions of the film roll body 990. In the film roll body 990, each stand-up pouch 99 is arranged such that the vertical direction of each stand-up pouch 99 faces the length direction of the film roll body 990. Note that the vertical direction in FIG. 2 corresponds to the length direction of the film roll body 990 (i.e., the vertical direction of each stand-up pouch 99), the left-right direction in FIG. 1 corresponds to the width direction of each stand-up pouch 99, and the direction perpendicular to the plane of FIG. 1 corresponds to the thickness direction of each stand-up pouch 99.

[0008] FIG. 3 illustrates a part of the manufacturing process of the film roll body 990. The film roll body 990 includes a first sheet 980 that constitutes the first sheet body 98 of each stand-up pouch 99, a second sheet 960 that constitutes the second sheet body of each stand-up pouch 99, and a gusset sheet 970 that constitutes the bottom material 97 of each stand-up pouch 99. When manufacturing the film roll body 990, the gusset sheet 970 is sandwiched between the first sheet 980 and the second sheet 960 at a position corresponding to the bottom material 97 of each stand-up pouch 99. That is, the manufacturing process of the film roll body 990 includes a step of inserting a gusset sheet 970 folded in two (folded in a mountain fold, for example, in half along the width direction) from the width direction between the first sheet 980 and the second sheet 960 (gusset sheet insertion step).

[0009] As described above, the gusset sheet 970 is folded into a valley fold along the width direction, whereby the gusset sheet 970 is divided into two parts (the first part 971A and the second part 971B) with the folding line as the boundary, as shown in FIG. 3. Here, in the bottom material 97 of the stand-up pouch 99, the surfaces 94 of the first part piece 95A and the second part piece 95B that face the inside of the valley fold are not bonded to each other. Accordingly, in the film roll body 990, the surfaces 972 of the first part 971A and the second part 971B that face the inside of the valley fold are also not bonded to each other. Therefore, a gap (space) may be formed between the surface 972 of the first part 971A and the surface 972 of the second part 971B, that is, the gusset sheet 970 sandwiched between the first sheet 980 and the second sheet 960 in a state closed by the valley fold may be opened. In particular, when the gusset sheet 970 is made of a resin film, generally, the resin film is less likely to have a fold mark when folded in half compared to paper and has a high tendency to return to its original state (the original open state). Therefore, there is a high possibility that the gusset sheet 970 folded into a valley fold will open again.

[0010] A sheet group including the first sheet 980, the second sheet 960, and the gusset sheet 970 folded into a valley fold between the two is conveyed in the bag-making progress direction (for example, the winding direction of the film roll body 990). As described above, in such a sheet group, the surfaces 972 of the first part 971A and the second part 971B of the gusset sheet 970 that face the inside of the valley fold are not bonded to each other. Then, after performing operations such as sealing the sheets to each other by heat welding or the like at a predetermined position, supplying a zipper tape or the like, and cutting to a predetermined width on such a sheet group, the film roll body 990 is manufactured by winding up such a sheet group.

[0011] FIG. 4 is a diagram for explaining problems that occur in the manufacturing process of the film roll body 990. By the gusset sheet insertion process illustrated in FIG. 3, the gusset sheet 970 is sandwiched between the first sheet 980 and the second sheet 960 in a state of being folded in a mountain fold. However, as described above, in the gusset sheet 970, the surfaces 972 facing the inside of the mountain fold of the first portion 971A and the second portion 971B are not bonded to each other, and a gap (a gap in the thickness direction) may occur between the two. That is, the gusset sheet 970 sandwiched between the first sheet 980 and the second sheet 960 in a state of being folded in a mountain fold may try to return to its original open (unfolded) state, and a gap may occur between the surface 972 of the first portion 971A and the surface 972 of the second portion 971B. Therefore, as illustrated in FIG. 4, air may enter from both ends in the width direction of the gusset sheet 970 folded in a mountain fold into the inside of the gusset sheet 970, that is, between the surface 972 of the first portion 971A and the surface 972 of the second portion 971B. For example, by the gusset sheet 970 folded in a mountain fold operating like a bellows, the gusset sheet 970 may suck air into the inside of the gusset sheet 970 from both ends in the width direction. In the example shown in FIG. 4, with respect to the gusset sheet 970(1) constituting the bottom material 97(1) of the stand-up bag 99(1), air has entered from both ends in the width direction of the gusset sheet 970(1) folded in a mountain fold into the inside of the gusset sheet 970(1).

[0012] The air that has entered the inside of the gusset sheet 970 is further pushed out by the surface 972 facing the inside of the mountain fold of the gusset sheet 970 (the first part 971A and the second part 971B) and may move to the lower side of the gusset sheet 970 (the left side of the paper in the example of FIG. 4). In the example shown in FIG. 4, the air that has entered the inside of the gusset sheet 970(1) constituting the bottom material 97(1) of the stand-up bag 99(1) is moving toward the rear side in the bag-making progress direction. Then, the air that has entered the inside of the gusset sheet 970(1) has entered between the first sheet 980 and the second sheet 960 (not shown) that constitute the first sheet body 98(2) of the stand-up bag 99(2) and has accumulated between them. Thus, when air accumulates between the first sheet 980 and the second sheet 960, it may cause an obstacle in the winding process or the like, which is not preferable in the manufacture of the film roll body 990.

[0013] As described above with reference to FIGS. 1 to 4, regarding the bottom material 97 of the conventional stand-up bag 99, at both ends in the width direction where the cutouts 96A and 96B are provided, the inner surfaces (surface 94) of the bottom material 97 that are mountain-folded and face each other are not bonded to each other. That is, regarding the first partial piece 95A and the second partial piece 95B of the bottom material 97 that are mountain-folded, the surfaces 94 facing the inside of each mountain fold are not bonded to each other. Accordingly, regarding the gusset sheet 970 that constitutes such a bottom material 97, only being mountain-folded, for the first part 971A and the second part 971B of the gusset sheet 970, the surfaces 972 facing the inside of each mountain fold are not bonded to each other. Therefore, when manufacturing the stand-up bag 99 (film roll body 990), the gusset sheet 970 folded in a mountain fold may open, and air may enter the inside of the gusset sheet 970 (between the two inner surfaces (surface 972) that face each other by being folded). And when air enters the inside of the gusset sheet 970, it becomes difficult to efficiently manufacture the film roll body 990, such as causing an obstacle in the winding process of the film roll body 990.

[0014] The present invention has been made in view of such circumstances, and an object thereof is to provide a self-standing bag or the like including a base material provided with cutouts at both ends in the width direction and preventing air from entering the inside of a gusset sheet constituting the base material during manufacturing.

Means for Solving the Problems

[0015] In order to solve the above-described problems, the present invention adopts the following configuration.

[0016] A self-standing bag according to a first aspect includes a pair of sheet bodies that are arranged to face each other in the thickness direction and are sealed to each other at both ends in the width direction, and a base material that is arranged to be sandwiched between the pair of sheet bodies in the thickness direction on the lower end side in the length direction. The base material is folded into two partial pieces along the width direction, and cutouts are provided in a part of each end in the width direction. At each of both ends in the width direction, one of the two partial pieces is sealed to one of the pair of sheet bodies, and the other of the two partial pieces is sealed to the other of the pair of sheet bodies along a line that is inclined with respect to the vertical direction on the center side in the width direction rather than the cutout. In the cutout portion, the pair of sheet bodies are directly sealed to each other, and the folded inner surfaces of the two partial pieces are at least partially adhered to each other at each end in the width direction. The self-standing bag includes the base material.

[0017] In this configuration, with respect to the bottom material of the stand-up pouch, the folded inner surfaces of each of the two partial pieces are at least partially adhered to each other at each end in the width direction. Accordingly, also with respect to the sheet (third sheet) that constitutes the bottom material and is folded into two parts along the width direction, the folded inner surfaces of each of the two parts are at least partially adhered to each other at each end in the width direction. Therefore, the above-described third sheet (the gusset sheet that constitutes the bottom material of the stand-up pouch) does not open during the manufacture of the stand-up pouch, and air does not enter inside the third sheet (between the two inner surfaces that face each other by being folded). Thus, the stand-up pouch includes the bottom material provided with notches at both ends in the width direction, and has the effect of being able to prevent air from entering inside the gusset sheet (the above-described third sheet) that constitutes the bottom material during the manufacturing process. Note that the folded inner surfaces of each of the two partial pieces are not adhered to each other except at each end in the width direction. Therefore, the above-described adhesion (adhesive portion) does not become an obstacle to the unfolding (opening) of the bottom material folded into the two partial pieces.

[0018] The stand-up pouch according to the second aspect is the stand-up pouch according to the first aspect, wherein the folded inner surface of each of the two partial pieces is made of a heat-resistant resin, Japanese paper, or kraft paper, and the folded inner surfaces of each of the two partial pieces may be at least partially adhered to each other at each end in the width direction using a part coat.

[0019] In this configuration, with respect to the bottom material of the stand-up pouch, the folded inner surface of each of the two partial pieces is made of a heat-resistant resin, Japanese paper, or kraft paper, and at least partially adhered to each other at each end in the width direction using a part coat. Accordingly, the stand-up pouch has the effect of being able to surely adhere the folded inner surfaces of each of the two partial pieces made of a heat-resistant resin, Japanese paper, or kraft paper to each other at least partially at each end in the width direction using a part coat.

[0020] The film roll body according to the third aspect is a film roll body in which a plurality of self-standing bags are continuously provided in the length direction and wound around in the length direction, wherein each of the self-standing bags is arranged such that the vertical direction of each self-standing bag faces the length direction of the film roll body, and each of the self-standing bags is arranged so as to face in the thickness direction and is sealed to each other at both ends in the width direction. A pair of sheet bodies, and a bottom material disposed between the pair of sheet bodies in the thickness direction on the lower end side in the length direction, the bottom material being folded into two partial pieces along the width direction, and notches being provided at a part of each end in the width direction. At both ends in the width direction, one of the two partial pieces is sealed to one of the pair of sheet bodies, the other of the two partial pieces is sealed to the other of the pair of sheet bodies along a line inclined with respect to the vertical direction on the center side in the width direction from the notch, and at the notch portion, the pair of sheet bodies are directly sealed to each other, and the folded inner surfaces of the two partial pieces are at least partially adhered to each other at each end in the width direction. A bottom material.

[0021] In this configuration, in the plurality of self-standing bags continuously provided in the length direction of the film roll body, the folded inner surfaces of the two partial pieces of the bottom material are at least partially adhered to each other at each end in the width direction. Accordingly, also with respect to the sheet (third sheet) folded into two parts along the width direction that constitutes the bottom material, the folded inner surfaces of the two parts are at least partially adhered to each other at each end in the width direction. Therefore, the above-described third sheet (the gusset sheet that constitutes the bottom material of the self-standing bag) does not open during the manufacture of the self-standing bag, and air does not enter the inside of the third sheet (between the two inner surfaces that face each other by being folded). Therefore, the film roll body has the effect that it is possible to produce the self-standing bag including the bottom material provided with notches at both ends in the width direction and preventing air from entering the inside of the gusset sheet that constitutes the bottom material during manufacture.

[0022] The film roll body according to the fourth aspect is the film roll body according to the third aspect, wherein the folded inner surfaces of the two partial pieces are each composed of a heat-resistant resin, Japanese paper, or kraft paper, and the folded inner surfaces of the two partial pieces may be at least partially adhered to each other at each end in the width direction using a part coat.

[0023] In this configuration, the film roll body has the effect that the folded inner surfaces of the two partial pieces each composed of a heat-resistant resin, Japanese paper, or kraft paper can be surely adhered to each other at least partially at each end in the width direction using a part coat.

[0024] A method for manufacturing a film roll body according to a fifth aspect is a method for manufacturing a film roll body in which a plurality of self-standing bags each having a base material folded into two partial pieces along the width direction and having a notch provided in a part of each end in the width direction are continuously provided in the length direction and wound around in the length direction. The method includes a step of sandwiching a third sheet constituting the base material of the self-standing bag between the thickness directions of a pair of sheets constituting a pair of sheet bodies that are arranged to face each other in the thickness direction of the self-standing bag and sealed to each other at both ends in the width direction. The third sheet is folded into two parts along the width direction, holes penetrating the two parts are formed on each end side in the width direction of the third sheet, and the folded inner surfaces of the two parts are at least partially adhered to each other at each end in the width direction. The step of sandwiching the third sheet includes a step of cutting the pair of sheets and the third sheet sandwiched between the thickness directions of the pair of sheets to the same width, and a step of cutting each end side in the width direction of each sheet so that the holes formed on each end side in the width direction of the third sheet constitute the notches of the base material.

[0025] In this configuration, the folded inner surfaces of each of the two portions of the third sheet (the gusset sheet that forms the bottom material of the stand-up bag) are at least partially adhered to each other at each end in the width direction. Therefore, the third sheet will not open during the manufacture of the stand-up bag (the film roll body), and air will not enter the interior of the third sheet (between the two inner surfaces that face each other by being folded). Accordingly, the method for manufacturing the film roll body has the effect that it can manufacture the stand-up bag provided with the bottom material having cutouts provided at both ends in the width direction while preventing air from entering the interior of the gusset sheet that forms the bottom material during the manufacturing process.

[0026] The method for manufacturing a film roll body according to the sixth aspect is the method for manufacturing a film roll body according to the fifth aspect, wherein in the step of cutting each end side in the width direction of each sheet, the adhered portions of the folded inner surfaces of each of the two portions of the third sheet are configured to be the adhered portions of the folded inner surfaces of each of the two partial pieces of the bottom material at each end in the width direction. Each end side in the width direction of each sheet may be cut.

[0027] In this configuration, the method for manufacturing the film roll body cuts each end side in the width direction of each sheet such that the adhered portions of the inner surfaces of the third sheet form the adhered portions of the inner surfaces of the bottom material. Therefore, even after the step of cutting each end side in the width direction of each sheet is executed, the inner surfaces of the third sheet (the gusset sheet that forms the bottom material of the stand-up bag) are at least partially adhered to each other at each end in the width direction. Accordingly, the method for manufacturing the film roll body has the effect that it can prevent air from entering the interior of the gusset sheet (the third sheet) that forms the bottom material even after the execution of the cutting step.

[0028] The manufacturing method of the film roll body according to the seventh aspect is the manufacturing method of the film roll body according to the fifth or sixth aspect, wherein the folded inner surfaces of the two parts are each composed of a heat-resistant resin, Japanese paper, or kraft paper, and the folded inner surfaces of the two parts may be at least partially adhered to each other using a part coat at each end in the width direction.

[0029] In this configuration, the manufacturing method of the film roll body has the effect that the folded inner surfaces of the two parts each composed of a heat-resistant resin, Japanese paper, or kraft paper can be surely adhered to each other at least partially at each end in the width direction using a part coat.

Effects of the Invention

[0030] According to the present invention, it is possible to provide a self-standing bag or the like that includes a base material provided with notches at both ends in the width direction and prevents air from entering the inside of the gusset sheet constituting the base material during manufacturing.

Brief Description of the Drawings

[0031]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5A

Figure 5B

Figure 5C

Figure 5D

Figure 5E

Figure 5F

Figure 5G

Figure 5H

Figure 5I

Figure 5J

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0032] Hereinafter, an embodiment according to one aspect of the present invention (hereinafter, also referred to as "this embodiment") will be described with reference to the drawings. However, the embodiment described below is merely an exemplification of the present invention in every aspect. Needless to say, various improvements and modifications can be made without departing from the scope of the present invention. That is, in carrying out the present invention, a specific configuration according to the embodiment may be appropriately adopted.

[0033] [Configuration Example] (Stand-up Pouch) Hereinafter, with reference to FIGS. 5A to 5J, FIG. 6, and FIG. 7, the details of the configuration of the stand-up pouch 10 according to the present embodiment will be described. FIG. 5A is a front view of the stand-up pouch 10, schematically illustrating an example of the form seen from one surface of the stand-up pouch 10. FIG. 5B is a rear view of the stand-up pouch 10, schematically illustrating an example of the form seen from the other surface of the stand-up pouch 10. Similarly, FIG. 5C is a plan view and a bottom view of the stand-up pouch 10. Specifically, (A) of FIG. 5C is a plan view of the stand-up pouch 10, and (B) of FIG. 5C is a bottom view of the stand-up pouch 10. Further, FIG. 5D is a right side view and a left side view of the stand-up pouch 10. Specifically, (A) of FIG. 5D is a right side view of the stand-up pouch 10, and (B) of FIG. 5D is a left side view of the stand-up pouch 10. Note that the vertical direction in FIGS. 5A and 5B corresponds to the vertical direction (the length direction of the film roll body 1) of each stand-up pouch 10, the horizontal direction in FIGS. 5A and 5B corresponds to the width direction of each stand-up pouch 10, and the direction perpendicular to the paper surface in FIGS. 5A and 5B corresponds to the thickness direction of each stand-up pouch 10. FIG. 5E is an enlarged view of the A-B portion of FIG. 5A, and FIG. 5F is an enlarged end face view of C-C of FIG. 5E. FIG. 5G is a reference front view showing the welded portion. FIG. 5H is a reference enlarged view of the A-B portion showing the portions (309, 310) where the opposing inner surfaces (first surfaces 301) of the bottom material 30 are adhered to each other, and FIG. 5I is a reference enlarged end face view of C-C showing the portions (309, 310) where the opposing inner surfaces of the bottom material 30 are adhered to each other. FIG. 5J is a cross-sectional view schematically illustrating an example of the relationship between each sheet body (11, 12) and the bottom material 30 in the stand-up pouch 10. FIG. 6 illustrates the configuration of the bottom material 30 according to the present embodiment. FIG. 7 is a front view of the bottom material 30.

[0034] Each self-standing bag 10 includes a pair of sheet bodies (11, 12) that are arranged to face each other in the thickness direction and are sealed to each other at both ends (18, 19) in the width direction. Hereinafter, for convenience of explanation, each sheet body (11, 12) will be referred to as the first sheet body 11 and the second sheet body 12. The sheet bodies (11, 12) may be interchanged. The width direction of each self-standing bag 10 is a direction that intersects at a right angle with the vertical direction of each self-standing bag 10 in the plane of each sheet body (11, 12). Further, the thickness direction of each self-standing bag 10 is a direction in which the sheet bodies (11, 12) are stacked, and an accommodation space is formed between the sheet bodies (11, 12). The sealing at both ends (18, 19) may be performed, for example, by heat welding or the like. In the present embodiment, each sheet body (11, 12) is formed in a rectangular shape, and thereby, the self-standing bag 10 is formed in a rectangular flat shape.

[0035] One end 15 of each self-standing bag 10 is open. In the illustrated example, each self-standing bag 10 includes a single-sided type zipper tape 20 that is arranged on one end 15 side in the length direction and is attached to only one of the pair of sheet bodies (11, 12). Each self-standing bag 10 further includes a bottom material 30 that is arranged so as to be sandwiched between the thickness directions of the pair of sheet bodies (11, 12) on the other end 16 side in the length direction and is sealed to both of the pair of sheet bodies (11, 12). In the present embodiment, the zipper tape 20 is arranged in parallel with the width direction in the first sheet body 11, but the arrangement of the zipper tape 20 is not limited to such an example. In an example of another form, the zipper tape 20 may be arranged in the second sheet body 12. Note that "arranged on one end 15 side in the length direction" means arranged on the end 15 side rather than the center in the vertical direction of each self-standing bag 10, and may include being slightly away from the center rather than from the end 15. Similarly, "arranged on the other end 16 side in the length direction" means arranged on the end 16 side rather than the center in the vertical direction of each self-standing bag 10, and may include being slightly away from the center rather than from the end 16.

[0036] The zipper tape 20 is attached to one surface of the self-supporting bag 10 (in this embodiment, the first sheet body 11). As long as it is configured to be able to repeatedly seal and open the storage space on the attached surface, other configurations do not particularly need to be limited and may be appropriately selected according to the embodiment. For the zipper tape 20, for example, known zipper tapes proposed in JP-A-2014-113263, JP-A-2014-114035, JP-A-2018-188196, JP-A-2019-051963, etc. may be used. As a specific example, a zipper tape such as model number: MFL-809Z2 of Shudoh Co., Ltd. may be used for the zipper tape 20.

[0037] As an example of the configuration, the zipper tape 20 may include an opening tab 21 disposed on one end (for example, end 19) side in the width direction, and a tape 210 for opening connected to the tab 21 and extending in the width direction. By pulling the tab from one end to the other end (for example, end 18) side in the width direction, the tape 210 can be separated, and thereby an opening can be formed in the portion where the tape 210 was disposed on the first sheet body 11. The zipper tape 20 may include a strip-shaped first base (not shown) hanging from one end 15 side to the other end 16 side in the vertical direction from the inner surface of the first sheet body 11 on one side of the opening, and a strip-shaped second base disposed on the other end 16 side in the vertical direction from the opening and facing the first base. By providing either the male fitting portion or the female fitting portion in the first base, and providing the other of the male fitting portion and the female fitting portion in the second base, the zipper tape 20 may be configured to be able to repeatedly seal and open the formed opening. Note that there are drawings in which configurations provided at each end in the width direction of the zipper tape 20, such as the tab 21 and the trapezoidal seal portion, are not shown as appropriate according to the gist of each drawing.

[0038] The substrate 30 may not be particularly limited as long as it can contribute to the self-standing of the self-standing bag 10, and may be appropriately selected according to the embodiment. In the present embodiment, the substrate 30 is formed in a rectangular shape and is folded in a mountain fold along the width direction into two equal parts. As a result, the substrate 30 is divided into two partial pieces (31, 32) with the folding line as a boundary, as exemplified in FIG. 5J and the like. Hereinafter, for convenience of explanation, each partial piece (31, 32) will be referred to as a first partial piece 31 and a second partial piece 32. The length of the substrate 30 in the width direction is the same as the length of each sheet body (11, 12) in the width direction, and each end portion of the substrate 30 in the width direction is sandwiched in the thickness direction between each end portion of each sheet body (11, 12).

[0039] One of the two partial pieces (31, 32) of the base material 30 is sealed to one of the pair of sheet bodies (11, 12), and the other of the two partial pieces (31, 32) is sealed to the other of the pair of sheet bodies (11, 12). For example, the colored portion (gray portion) in FIG. 5G indicates the sealed portion (for example, the portion where any two of the sheet bodies (the first sheet body 11, the second sheet body 12, and the base material 30) are welded together). In FIG. 5G, for the sake of easy understanding of the sealed portion (gray portion), the configurations provided at each end in the width direction of the zipper tape 20, such as the tab 21 and the trapezoidal sealed portion, are omitted from the drawing. In the present embodiment, the first sheet body 11 has a first surface 111 facing the outside of the stand-up pouch 10 and a second surface 112 facing the inside (i.e., the accommodation space side). Similarly, the second sheet body 12 has a first surface 121 facing the outside of the stand-up pouch 10 and a second surface 122 facing the inside. Further, the base material 30 has a first surface 301 facing the inside of the mountain fold and a second surface 302 facing the outside. The base material 30 and each sheet body (11, 12) are sealed to each other along the other end portion 16 in the vertical direction and both end portions (18, 19) in the width direction. That is, at each end portion (18, 19) in the width direction, in the portion where the base material 30 exists, except for the portions of the notches (307, 308) described later, the base material 30 and each sheet body (11, 12) are sealed to each other instead of the sheet bodies (11, 12). Further, the base material 30 and each sheet body (11, 12) are sealed to each other along lines (305, 306) that are inclined from the ends of each end portion (18, 19) in the width direction toward the other end portion 16 in the vertical direction on the side of one end portion 15 in the vertical direction of the base material 30 and toward the center in the width direction. At this time, the second surface 302 of the first partial piece 31 of the base material 30, the second surface 112 of the first sheet body 11, the second surface 302 of the second partial piece 32, and the second surface 122 of the second sheet body 12 are sealed to each other. The sealing of each portion may be performed, for example, by heat welding or the like.

[0040] Here, notches (307, 308) are provided at a part of each end in the width direction of the base material 30. At the part of these notches (307, 308), the second surfaces (112, 122) of the sheet bodies (11, 12) constituting each end (18, 19) are in direct contact with each other, whereby the sheet bodies (11, 12) are sealed to each other. By this sealing, when the base material 30 is expanded to make the stand-up bag 10 in a self-standing form, it is possible to prevent the existing parts of the base material 30 at each end (18, 19) from expanding. As a result, by the parts of each end (18, 19) having appropriate hardness, the stand-up bag 10 can be easily self-standing even in a state where the contents are filled. In the examples of FIGS. 5A and 5B, each notch (307, 308) is formed in an arc shape. However, the shape of each notch (307, 308) is not limited to such an example as long as the second surfaces (112, 122) of the sheet bodies (11, 12) can be in contact with each other, and may be appropriately selected according to the embodiment.

[0041] Also, as shown in FIGS. 5F, 5I, 6, 7, etc., adhesive portions (309, 310) are provided at a part of each end in the width direction of the base material 30. In the base material 30 according to the present embodiment, the first surfaces 301 (folded inner surfaces) of the two partial pieces (31, 32) are adhered to each other at the adhesive portion 309 and the adhesive portion 310. For example, the colored part (gray part) in FIG. 5H shows the adhesive portions (309, 310) where the inner surfaces (first surfaces 301) of the base material 30 facing each other are adhered to each other. In the example shown in FIG. 5H, the two partial pieces (31, 32) of the base material 30 have their inner surfaces (first surfaces 301) adhered to each other at the adhesive portion 309 and the adhesive portion 310 provided at each end in the width direction. That is, in the base material 30, the folded inner surfaces (first surfaces 301) of the two partial pieces (31, 32) are adhered to each other at least partially (for example, at the adhesive portions (309, 310)) at each end in the width direction. In other words, the two inner surfaces (first surfaces 301) of the base material 30 folded in a valley fold along the width direction are adhered to each other at least partially at each end in the width direction.

[0042] In this configuration, for the bottom material 30 of the stand-up pouch 10, the first surfaces 301 (folded inner surfaces) of the two partial pieces (31, 32) are at least partially adhered to each other at each end portion (18, 19) in the width direction. Accordingly, for the sheet (for example, the third sheet 60 described later) that constitutes the bottom material 30 and is folded into two parts along the width direction, the folded inner surfaces of the two parts are also at least partially adhered to each other at each end portion (for example, the end portions (48, 49) described later) in the width direction. Therefore, the above-described third sheet 60 (the gusset sheet that constitutes the bottom material 30 of the stand-up pouch 10) will not open during the manufacture of the stand-up pouch 10, and air will not enter the inside of the third sheet 60 (between the two inner surfaces that face each other by being folded). Accordingly, the stand-up pouch 10 includes the bottom material 30 provided with notches (307, 308) at both ends in the width direction, and has the effect of being able to prevent air from entering the inside of the gusset sheet (the above-described third sheet 60) that constitutes the bottom material 30 during the manufacturing process. Note that the first surfaces 301 of the two partial pieces (31, 32) are not adhered to each other except at each end portion in the width direction. Therefore, the above-described adhesion (adhesive portions (309, 310)) does not hinder the unfolding (opening) of the bottom material 30 folded into the two partial pieces (31, 32). That is, by adhering the inner surfaces (first surfaces 301) of the bottom material 30 that face each other at least partially to each other at each end portion in the width direction, it is possible to suppress air from entering between the inner surfaces of the bottom material 30 that face each other from each end portion in the width direction of the bottom material 30.

[0043] As will be described later, the first surface 301 of the base material 30 may be made of, for example, a heat-resistant resin, Japanese paper, or kraft paper. That is, in the base material 30, the first surface 301 (the folded inner surface) of each of the two partial pieces (31, 32) may be made of, for example, a heat-resistant resin, Japanese paper, or kraft paper. When the first surface 301 of the base material 30 is made of a heat-resistant resin, Japanese paper, or kraft paper, the ends of the first surfaces 301 of the base material 30 facing each other may be adhered to each other using a part coat. That is, in the base material 30, the inner surfaces (the first surfaces 301) of the respective partial pieces (31, 32) may be adhered to each other at the adhesion portions 309 and 310 using, for example, a heat-adhesive paste material called a part coat.

[0044] When the first surface 301 of each of the two partial pieces (31, 32) of the base material 30 is made of a heat-resistant resin, Japanese paper, or kraft paper, it becomes difficult to heat-weld (heat-seal) the first surfaces 301 facing each other. Therefore, for example, by applying (printing) a part coat to the adhesion portions 309 and 310 of the first surface 301, the first surface 301 of each partial piece (31, 32) may be adhered to each other at the adhesion portions 309 and 310. The part coat is suitable for partially heat-adhering surfaces of a film made of a resin that is difficult to heat-seal. For example, the part coat is suitable for partially heat-adhering surfaces made of, for example, stretched polypropylene, which is excellent in moisture resistance but difficult to heat-seal. By adhering the first surface 301 of each of the two partial pieces (31, 32) made of a heat-resistant resin, Japanese paper, or kraft paper to each other using a part coat at the adhesion portions 309 and 310, the above-mentioned stand-up pouch 10 (particularly, the base material 30) can be manufactured at low cost. The stand-up pouch 10 has the effect that the first surfaces 301 (the folded inner surfaces) of each of the two partial pieces (31, 32) made of a heat-resistant resin, Japanese paper, or kraft paper can be surely adhered to each other at least partially at each end in the width direction using a part coat.

[0045] In the examples shown in FIGS. 5F, 5I, 6, 7, etc., notches (307, 308), adhesive portions (309, 310), and non-adhesive portions (311, 312) are provided at a part of each end in the width direction of the base material 30. As described above, in the base material 30, the first surfaces 301 (folded inner surfaces) of the two partial pieces (31, 32) are adhered to each other at the adhesive portions 309 and 310. In the illustrated example, the adhesive portions (309, 310) are provided, for example, above and below the notches (307, 308) in the length direction. Therefore, the first surfaces 301 of the two partial pieces (31, 32) are adhered to each other above the notches (307, 308) at each end in the width direction, and also adhered to each other below the notches (307, 308). In particular, in the examples shown in FIGS. 5F, 5H, 5I, 7, etc., in the base material 30 arranged so as to be sandwiched between the pair of sheet bodies (11, 12) in the thickness direction in a state folded into the two partial pieces (31, 32), the lower side in the length direction of the adhesive portions (309, 310) extends to the lower end of the base material 30 (the two partial pieces (31, 32)) in the vertical direction (length direction) of the stand-up pouch 10. Therefore, by adhering the first surfaces 301 of the two partial pieces (31, 32) to each other at the adhesive portions (309, 310), it is possible to more reliably prevent air from entering between the first surfaces 301. However, for the stand-up pouch 10 (particularly, the base material 30) according to the present embodiment, it is not essential that the lower side in the length direction of the adhesive portions (309, 310) extends to the lower end of the base material 30 in the vertical direction of the stand-up pouch 10.

[0046] Also, in the base material 30, the first surfaces 301 of the two partial pieces (31, 32) are not adhered to each other at the notches (307, 308) and the non-adhesive portions (311, 312). That is, in the base material 30 according to the present embodiment, the first surfaces 301 (folded inner surfaces) of the two partial pieces (31, 32) are partially adhered to each other (specifically, at the adhesive portions 309 and 310) at each end in the width direction.

[0047] For example, the non-adhesive portions (311, 312) are provided in the base material 30 in the vicinity of the positions where each end portion (18, 19) in the width direction intersects with the inclined lines (305, 306). Here, as described above, in the self-supporting bag 10, the base material 30 and each sheet body (11, 12) are sealed to each other along each end portion (18, 19) in the width direction and the inclined lines (305, 306). Then, regarding the application (printing) of the part coat in the vicinity of the position where each end portion (18, 19) in the width direction intersects with the inclined lines (305, 306) (for example, the position where the non-adhesive portions (311, 312) are provided), the following points are a concern. That is, when the position where the part coat is applied is shifted toward the center in the width direction, or when the applied part coat leaks out toward the center in the width direction, or when the bag-making position is shifted with respect to the position where the part coat is applied, it may become an obstacle when the folded base material 30 is unfolded (opened). Therefore, in order to prevent any obstacle from occurring in the unfolding of the base material 30 even when the position where the part coat is applied is shifted toward the center in the width direction, the applied part coat leaks out toward the center in the width direction, or the bag-making position is shifted with respect to the position where the part coat is applied, it is desirable not to apply the part coat to the non-adhesive portions (311, 312). By not applying the part coat in the vicinity of the position where each end portion (18, 19) in the width direction intersects with the inclined lines (305, 306), the unfolding of the base material 30 is not hindered even when the application position is shifted toward the center in the width direction, the part coat leaks out toward the center in the width direction, or the bag-making position is shifted with respect to the position where the part coat is applied.

[0048] However, for the base material 30 according to the present embodiment, it is not essential to provide the non-adhesive portions (311, 312). In the base material 30, the folded inner surfaces (first surfaces 301) of the two partial pieces (31, 32) may be at least partially adhered to each other at each end in the width direction. In the base material 30, the folded inner surfaces (first surfaces 301) of the two partial pieces (31, 32) may be adhered to each other over the entire length of each end in the width direction excluding, for example, the notches (307, 308). For example, the upper side in the length direction of the adhesive portions (309, 310) may extend to the position where the lines (305, 306) inclined with respect to the respective ends (18, 19) in the width direction intersect.

[0049] In each of the adhesive portions 309 and 310, the second surface 302 of the first partial piece 31 of the base material 30 and the second surface 112 of the first sheet body 11, and the second surface 302 of the second partial piece 32 and the second surface 122 of the second sheet body 12 are sealed to each other. The sealing of each portion may be performed, for example, by heat welding or the like.

[0050] (Film roll body) The self-standing bag 10 that has been described so far with reference to FIGS. 5A to 5J, FIG. 6, and FIG. 7 can be produced using the film roll body 100 illustrated in FIG. 8 and the like. FIG. 8 schematically illustrates an example of the film roll body 100 according to the present embodiment, and in particular, is a front view of the film roll body 100. The film roll body 100 is configured such that a plurality of self-standing bags 10 are continuously provided in the length direction and are wound around in the length direction. The length direction corresponds to the feeding and winding directions of the film roll body 100. Each self-standing bag 10 is arranged such that the vertical direction of each self-standing bag 10 faces the length direction of the film roll body 100. Therefore, by feeding out the wound film roll body 100, it is possible to supply each self-standing bag 10 in a state where the vertical direction faces the feeding direction. Note that the left-right direction in FIG. 8 corresponds to the length direction of the film roll body 100 and the vertical direction of each self-standing bag 10, the up-down direction in FIG. 8 corresponds to the width direction of each self-standing bag 10, and the direction perpendicular to the plane of FIG. 8 corresponds to the thickness direction of each self-standing bag 10. In FIG. 8, for the sake of easy understanding of the outline of the film roll body 100 in which a plurality of self-standing bags 10 are continuously provided in the length direction, the configurations such as the tabs 21 and the trapezoidal seal portions provided at each end in the width direction of each self-standing bag 10 are omitted from the drawing.

[0051] Details will be described later with reference to FIG. 9, but the film roll body 100 includes a pair of sheets (41, 42) (sheet 42 is not shown in the figure) that constitute a pair of sheet bodies (11, 12) that are arranged facing each other in the thickness direction of each self-standing bag 10 and are sealed to each other at both ends in the width direction. Hereinafter, for the sake of convenience of explanation, each sheet (41, 42) will be referred to as the first sheet 41 and the second sheet 42. Further, the film roll body 100 includes a plurality of third sheets 60 that constitute the bottom material 30 of each self-standing bag 10. Each third sheet 60 is folded into two parts along the width direction and is sandwiched between the pair of sheets (41, 42) in the thickness direction. In particular, each third sheet 60 is sandwiched at a position corresponding to the bottom material 30 of each self-standing bag 10.

[0052] The first sheet 41 has a surface facing the outside of the film roll body 100 (stand-up pouch 10), corresponding to the first surface 111 and the second surface 112 of the first sheet body 11, and a surface facing the inside of the film roll body 100 (stand-up pouch 10) (i.e., the accommodation space side). Similarly, the second sheet 42 has a surface facing the outside of the film roll body 100 (stand-up pouch 10), corresponding to the first surface 121 and the second surface 122 of the second sheet body 12, and a surface facing the inside of the film roll body 100 (stand-up pouch 10) (i.e., the accommodation space side). Further, the third sheet 60 has a surface facing the inside of the mountain fold and a surface facing the outside, corresponding to the first surface 301 and the second surface 302 of the bottom material 30.

[0053] As described so far, the film roll body 100 is a film roll body in which a plurality of self-standing bags 10 are continuously provided in the length direction and wound around in the length direction. Each self-standing bag 10 is arranged such that the vertical direction of each self-standing bag 10 faces the length direction of the film roll body 100. In the film roll body 100, each self-standing bag 10 includes a pair of sheet bodies (11, 12) that are arranged facing each other in the thickness direction and sealed to each other at both ends (18, 19) in the width direction, and a bottom material 30. The bottom material 30 is arranged to be sandwiched between the pair of sheet bodies (11, 12) in the thickness direction on the lower end side in the vertical direction (the length direction of the film roll body 100) of each self-standing bag 10, and is sealed to both of the pair of sheet bodies (11, 12). The bottom material 30 is folded into two partial pieces (31, 32) along the width direction, and notches (307, 308) are provided in a part of each end (18, 19) in the width direction. At each of both ends in the width direction of the bottom material 30, one of the two partial pieces (31, 32) is sealed to one of the pair of sheet bodies (11, 12), and the other of the two partial pieces (31, 32) is sealed to the other of the pair of sheet bodies (11, 12) along inclined lines (305, 306). Such inclined lines (305, 306) are inclined with respect to the vertical direction on the center side in the width direction rather than the notches (307, 308). And at the portions of the notches (307, 308), the pair of sheet bodies (11, 12) are directly sealed to each other. In the bottom material 30, the first surfaces 301 (the folded inner surfaces) of the two partial pieces (31, 32) are adhered to each other at least partially (for example, at the adhesive portions 309 and 310) at each end in the width direction.

[0054] In this configuration, in each of the plurality of self-standing bags 10 provided continuously in the length direction of the film roll body 100, the first surfaces 301 of the two partial pieces (31, 32) of the bottom material 30 are at least partially adhered to each other at each end in the width direction. Accordingly, also with respect to the sheet (third sheet 60) that constitutes the bottom material 30 and is folded into two parts along the width direction, the folded inner surfaces of the two parts are at least partially adhered to each other at each end in the width direction (for example, the ends (48, 49) described later). Therefore, the third sheet 60 (the gusset sheet that constitutes the bottom material 30 of each self-standing bag 10) does not open during the production of the film roll body 100 (self-standing bag 10), and air does not enter the inside of the third sheet 60 (between the two inner surfaces that face each other by being folded). Thus, the film roll body 100 has the effect that it can produce the self-standing bag 10 including the bottom material 30 provided with notches (307, 308) at both ends in the width direction and preventing air from entering the inside of the gusset sheet (third sheet 60) that constitutes the bottom material 30 during production.

[0055] The shapes and dimensions of the film roll body 100 and each self-standing bag 10 may be appropriately determined according to, for example, the content volume, the specifications of the packaging machine, etc. As an example, the length in the vertical direction of each self-standing bag 10 may be 200 mm to 300 mm, the length in the width direction of each self-standing bag 10 may be 200 mm to 270 mm, and the total length of the film roll body 100 may be 300 m to 500 m. According to this configuration, a film roll body 100 capable of producing a self-standing bag 10 suitable for containing 1 kg to 2 kg of rice can be provided. As another example, the length in the vertical direction of each self-standing bag 10 may be 370 mm to 390 mm (for example, 380 mm), and the length in the width direction of each self-standing bag 10 may be 280 mm to 300 mm (for example, 290 mm). In this case, a film roll body 100 capable of producing a self-standing bag 10 suitable for containing 5 kg of rice can be provided.

[0056] [Material] For each component of the film roll body 100 (stand-up pouch 10), a resin material that can be used for the packaging bag may be appropriately used. In this embodiment, as described above, the second surfaces (112, 122) of the respective sheet bodies (11, 12), the second surface 112 of the first sheet body 11 and the second surface 302 of the bottom material 30, and the second surface 122 of the second sheet body 12 and the second surface 302 of the bottom material 30 are sealed to each other. Therefore, when assuming sealing by heat welding, for the layers constituting the first surfaces (111, 121) of the respective sheet bodies (11, 12) and the first surface 301 of the bottom material 30 (i.e., the non-sealed surfaces), for example, a resin material (heat-resistant resin) such as polyester mainly composed of polyethylene terephthalate (PET), polyamide (nylon), or stretched polypropylene, which has a high melting temperature and is relatively difficult to heat-weld, is preferably used. Further, for the layers constituting the first surface of each sheet body and the first surface 301 of the bottom material 30, for example, those obtained by imparting functions such as oxygen barrier properties such as metal film deposition to the above-described resin material may be used, or, for the purpose of cosmetic properties and non-weldability, Japanese paper or kraft paper may be used. For example, the first surface 301 of the bottom material 30 is preferably composed of a heat-resistant resin. In other words, in the bottom material 30, the first surface 301 (the folded inner surface) of each of the two partial pieces (31, 32) is preferably composed of a heat-resistant resin. Also, the first surface 301 of the bottom material 30 may be composed of a heat-resistant resin imparted with functions such as oxygen barrier properties such as metal film deposition, or may be composed of Japanese paper or kraft paper for the purpose of cosmetic properties and non-weldability. That is, in the bottom material 30, the first surface 301 of each of the two partial pieces (31, 32) may be composed of a heat-resistant resin imparted with functions such as oxygen barrier properties such as metal film deposition, or may be composed of Japanese paper or kraft paper for the purpose of cosmetic properties and non-weldability. However, when using a heat-resistant resin for the layers constituting the first surface of each sheet body and the first surface 301 of the bottom material 30, it is not essential that such a heat-resistant resin be mainly composed of PET, and a heat-resistant resin not mainly composed of PET may also be used. The layers constituting the first surface of each sheet body and the first surface 301 of the bottom material 30 are each composed of, for example, a heat-resistant resin, Japanese paper, or kraft paper.On one hand, for the second surfaces (112, 122) of the respective sheet bodies (11, 12) and the layer constituting the second surface 302 of the base material 30 (i.e., the surface to be sealed), it is preferable to use a resin material with a low melting temperature, such as polyethylene or unstretched polypropylene, which has excellent heat weldability. Therefore, for each of the sheet bodies (11, 12) and the base material 30, as described above, a laminated film (for example, a laminate film) composed of a plurality of resin materials may be used such that one surface is easily heat-welded and the other surface is difficult to heat-weld. Further, an intermediate layer may be provided in this laminated film. For example, a resin such as EVAL, which has excellent oxygen barrier properties, or a metal foil such as aluminum may be provided as the intermediate layer.

[0057] In accordance with the use of the heat-resistant resin material, Japanese paper, or kraft paper as described above for the layer constituting the first surfaces (111, 121) of the respective sheet bodies (11, 12) and the first surface 301 of the base material 30 (i.e., the surface not to be sealed), each of the sheets (41, 42) and the third sheet 60 is also configured in the same manner. That is, the heat-resistant resin material, Japanese paper, or kraft paper as described above may be used for the layer constituting the surface facing the outside of each of the sheets (41, 42) and the surface facing the inside of the mountain fold of the third sheet 60. Further, in accordance with the use of a resin material with a low melting temperature for the layer constituting the second surfaces (112, 122) of the respective sheet bodies (11, 12) and the second surface 302 of the base material 30 (i.e., the surface to be sealed), each of the sheets (41, 42) and the third sheet 60 is also configured in the same manner. That is, a resin material with a low melting temperature may be used for the layer constituting the surface facing the inside of each of the sheets (41, 42) and the surface facing the outside of the mountain fold of the third sheet 60. Further, when realizing at least one of the sheets (41, 42) and the third sheet 60 using a laminated film, a resin with excellent oxygen barrier properties, a metal foil such as aluminum, etc. may be provided as the intermediate layer of such a laminated film.

[0058] [Manufacturing Method] The manufacturing method of the film roll body 100 (self-standing bag 10) will be described below with reference to FIG. 9. A known bag-making machine may be appropriately used for the method of manufacturing the film roll body 100 according to the present embodiment. In one example, first, one original roll is cut in half in the length direction, and out of the two obtained sheet materials, one is used as the sheet material (first sheet 41) constituting the first sheet body 11, and the other is supplied as the sheet material (second sheet 42) constituting the second sheet body 12. The method of supplying the sheet materials (first sheet 41 and second sheet 42) need not be limited to such an example and may be appropriately selected according to the configuration of a bag-making machine or the like. In another example, the sheet materials (first sheet 41 and second sheet 42) constituting each sheet body (11, 12) of each self-standing bag 10 may be supplied from each of the two original rolls. Next, a sheet (third sheet 60) constituting the bottom material 30 folded in two is sandwiched between the two supplied sheet materials at the position of the other end portion 16 in the vertical direction or in the vicinity thereof. Next, the corresponding portion is sealed by heat welding or the like. Further, on one of the two supplied sheet materials, a zipper tape 20 is supplied at a predetermined position on the side of one end portion 15 in the vertical direction. Then, the supplied zipper tape 20 is sealed to the sheet material by heat welding or the like. Note that the order of supplying the bottom material 30 and the zipper tape 20 need not be limited to such an example. In another example, the zipper tape 20 may be supplied and sealed to the sheet material. Thereafter, the bottom material 30 (or the third sheet 60) may be sandwiched between the two sheet materials (first sheet 41 and second sheet 42), and the corresponding portion of the bottom material 30 may be sealed. Thus, the film roll body 100 can be manufactured.

[0059] The manufacturing method of the film roll body according to this embodiment is a manufacturing method of a film roll body (film roll body 100) in which a plurality of self-standing bags (self-standing bag 10) are continuously provided in the length direction and wound around in the length direction. In such a film roll body, each self-standing bag includes a bottom material (bottom material 30), and the bottom material is folded into two partial pieces (partial pieces (31, 32)) along the width direction, and notches (notches (307, 308)) are provided at a part of each end in the width direction. The manufacturing method of the film roll body according to this embodiment includes at least a third sheet supply step and a cutting step. In the third sheet supply step, a third sheet 60 is sandwiched between the pair of sheets (41, 42) in the thickness direction. The cutting step is a step performed after the third sheet supply step. In the cutting step, the pair of sheets (41, 42) and the third sheet 60 that have passed through the third sheet supply step are cut to the same width.

[0060] FIG. 9 schematically illustrates an example of the state of the film roll body 100 before the cutting step. The third sheet 60 sandwiched between the pair of sheets (41, 42) in the thickness direction in the third sheet supply step is a sheet (sheet material) constituting the bottom material 30 of each self-standing bag 10. In the third sheet supply step, the third sheet 60 is sandwiched between the pair of sheets (41, 42) in a state of being folded into two parts along the width direction.

[0061] Holes (607, 608) penetrating the two parts of the third sheet 60 are formed on each end (48, 49) side in the width direction of the third sheet 60. That is, holes (607, 608) are provided at a part of each end (48, 49) in the width direction of the third sheet 60 folded into two parts along the width direction.

[0062] Further, on a part of each end portion (48, 49) in the width direction of the third sheet 60, adhesive portions (609, 610) are provided. In the third sheet 60 according to the present embodiment, the folded inner surfaces of the two parts are adhered to each other at the adhesive portions 609 and 610. The two parts of the third sheet 60 have their folded inner surfaces adhered to each other at the adhesive portions 609 and 610 provided at each end portion in the width direction. That is, in the third sheet 60, the folded inner surfaces of the two parts are adhered to each other at least partially (for example, at the adhesive portions (609, 610)) at each end portion in the width direction. In other words, the two inner surfaces of the third sheet 60 folded in a mountain fold along the width direction are adhered to each other at least partially at each end portion in the width direction.

[0063] After a third sheet supply step of sandwiching the third sheet 60 between the pair of sheets (41, 42) in the thickness direction is performed, a cutting step is performed on the sheet group including the pair of sheets (41, 42) and the third sheet 60 (the film roll body 100 illustrated in FIG. 9). Between the third sheet supply step and the cutting step, a step of moving the sheet group after the third sheet supply step (for example, moving it in the bag-making progress direction (for example, the winding direction of the film roll body 100)) may be included.

[0064] In the cutting step, the sheet group after the third sheet supply step (the film roll body 100 illustrated in FIG. 9) is cut to a predetermined width, that is, the pair of sheets (41, 42) and the third sheet 60 are cut to the same width. In the example shown in FIG. 9, the pair of sheets (41, 42) and the third sheet 60 are cut along the cutting line CL such that each end portion (48, 49) side in the width direction is cut. That is, the holes (607, 608) formed on each end portion (48, 49) side in the width direction of the third sheet 60 constitute the cutouts (307, 308) of the base material 30, and each end portion side in the width direction of the pair of sheets (41, 42) and the third sheet 60 is cut.

[0065] In this configuration, the folded inner surfaces of each of the two portions of the third sheet 60 (the gusset sheet that constitutes the bottom material 30 of the stand-up bag 10) are at least partially adhered to each other at each end portion (48, 49) in the width direction. Therefore, the third sheet 60 will not open during the manufacture of the stand-up bag 10 (film roll body 100), and air will not enter the inside of the third sheet 60 (between the two inner surfaces that face each other by being folded). Accordingly, the method for manufacturing the film roll body 100 has the effect that it can manufacture a stand-up bag 10 provided with a bottom material 30 having notches (307, 308) provided at both ends in the width direction while preventing air from entering during the manufacturing process inside the gusset sheet (third sheet 60) that constitutes the bottom material 30.

[0066] In particular, in the example shown in FIG. 9, in the cutting step, that is, in the step of cutting each end portion (48, 49) side in the width direction of each sheet (the pair of sheets (41, 42) and the third sheet 60), each end portion side in the width direction of each sheet is cut as follows. That is, the adhered portions (609, 610) of the folded inner surfaces of each of the two portions of the third sheet 60 that are adhered to each other constitute the adhered portions (309, 310) of the first surfaces 301 of the two partial pieces (31, 32) of the bottom material 30 that are adhered to each other at each end portion (18, 19) in the width direction, and each end portion side in the width direction of each sheet is cut.

[0067] In this configuration, in the method for manufacturing the film roll body 100, the adhesive portions (609, 610) that are adhered to each other on the inner surface of the third sheet 60 form the adhesive portions (309, 310) that are adhered to each other on the inner surface of the base material 30. Thus, the respective end portions on each side in the width direction of each sheet are cut. Therefore, even after the step of cutting the respective end portions on each side in the width direction of each sheet is executed, the inner surface of the third sheet 60 (the gusset sheet that constitutes the base material 30 of the stand-up bag 10) is at least partially adhered to each other at each end in the width direction. Accordingly, the method for manufacturing the film roll body 100 has the effect of being able to prevent air from entering the inside of the gusset sheet (the third sheet 60) that constitutes the base material 30 even after the cutting step is executed.

[0068] [Usage Method] First, as a first step, the film roll body 100 is fed out in the length direction. Next, as a second step, at the positions of the respective upper and lower ends (15, 16), the fed-out film roll body 100 is cut at a predetermined position along the width direction to supply the stand-up bag 10. Subsequently, as a third step, the contents to be filled in the stand-up bag 10 are weighed, and the weighed contents are filled into the supplied stand-up bag 10 from one end 15 side in the length direction. Then, as a fourth step, one end 15 of the stand-up bag 10 in the length direction is sealed by heat welding or the like. By the above steps, using the film roll body 100, a stand-up bag 10 containing the contents can be produced. The contents may be appropriately selected according to the embodiment. As an example, the contents may be rice. As another example, the contents may be other grains, grain flour, or the like.

[0069] (Features) The self-standing bag 10 according to this embodiment includes a pair of sheet bodies (11, 12) that are arranged to face each other in the thickness direction and are sealed to each other at both ends (18, 19) in the width direction, and a bottom material 30. The bottom material 30 is arranged to be sandwiched between the pair of sheet bodies (11, 12) in the thickness direction at the lower end side in the vertical direction (length direction) of each self-standing bag 10, and is sealed to both of the pair of sheet bodies (11, 12). The bottom material 30 is folded into two partial pieces (31, 32) along the width direction, and notches (307, 308) are provided in a part of each end (18, 19) in the width direction. At each end in the width direction of the bottom material 30, one of the two partial pieces (31, 32) is sealed to one of the pair of sheet bodies (11, 12), and the other of the two partial pieces (31, 32) is sealed to the other of the pair of sheet bodies (11, 12) along inclined lines (305, 306). Such inclined lines (305, 306) are inclined with respect to the vertical direction on the center side in the width direction from the notches (307, 308). And at the part of the notches (307, 308), the pair of sheet bodies (11, 12) are directly sealed to each other. In the bottom material 30, the first surfaces 301 (the folded inner surfaces) of the two partial pieces (31, 32) are adhered to each other at least partially (for example, at the adhesion parts 309 and 310) at each end in the width direction.

[0070] Further, the film roll body 100 according to this embodiment is a film roll body in which a plurality of self-standing bags 10 are continuously provided in the length direction and are wound around in the length direction. In the film roll body 100, each self-standing bag 10 is arranged such that the vertical direction of each self-standing bag 10 faces the length direction of the film roll body 100.

[0071] Furthermore, the method for manufacturing the film roll body 100 according to the present embodiment includes a third sheet supply step and a cutting step. The third sheet supply step is a step (process) of sandwiching the third sheet 60 that constitutes the bottom material 30 of the self-standing bag 10 between the pair of sheets (41, 42) in the thickness direction of the pair of sheet bodies (11, 12) of the self-standing bag 10. The third sheet 60 sandwiched between the pair of sheets (41, 42) in the thickness direction in the third sheet supply step is folded into two parts along the width direction, and holes (607, 608) penetrating the two parts are formed on each end portion (48, 49) side in the width direction. In addition, the inner surfaces of the two folded parts of the third sheet 60 are at least partially adhered to each other at each end portion in the width direction. In the example shown in FIG. 9 and the like, they are adhered to each other at the adhesion portions (609, 610). The cutting step is a step (process) of cutting each end portion (48, 49) side in the width direction of each sheet (the pair of sheets (41, 42) and the third sheet 60). In the cutting step, each sheet is cut to the same width, and in particular, it is cut as follows. That is, in the cutting step, each sheet is cut at each end portion side in the width direction such that the holes (607, 608) formed on each end portion side in the width direction of the third sheet 60 constitute the cutouts (307, 308) of the bottom material 30.

[0072] In this configuration, for the bottom material 30 of the stand-up pouch 10, the first surfaces 301 (folded inner surfaces) of the two partial pieces (31, 32) are at least partially adhered to each other at the respective end portions (18, 19) in the width direction. Accordingly, also for the third sheet 60 that constitutes the bottom material 30 and is folded into two parts along the width direction, the folded inner surfaces of the two parts are at least partially adhered to each other at the respective end portions (48, 49) in the width direction. Therefore, the above-described third sheet 60 (the gusset sheet that constitutes the bottom material 30 of the stand-up pouch 10) does not open during the production of the stand-up pouch 10, and air does not enter the inside of the third sheet 60 (between the two inner surfaces that face each other by being folded). Thus, the stand-up pouch 10 includes the bottom material 30 provided with notches (307, 308) at both ends in the width direction, and has the effect of preventing air from entering the inside of the gusset sheet (the above-described third sheet 60) that constitutes the bottom material 30 during production. Similarly, the film roll body 100 can produce the stand-up pouch 10 including the bottom material 30 provided with notches at both ends in the width direction and preventing air from entering the inside of the third sheet 60 that constitutes the bottom material 30 during production. Further, the manufacturing method of the film roll body 100 can manufacture the stand-up pouch 10 including the bottom material 30 provided with notches at both ends in the width direction while preventing air from entering the inside of the gusset sheet (the third sheet 60) that constitutes the bottom material 30 during production.

[0073] [Modification Example] The embodiments of the present invention have been described above. However, the description of the above embodiments is merely illustrative of the present invention in every aspect. Various improvements and modifications may be made to the above embodiments. With respect to each component of the above embodiments, omission, substitution, and addition of components may be appropriately performed. Further, the shape and dimensions of each component of the above embodiments may be appropriately changed according to the embodiment. For example, the following changes are possible. In the following, the same reference numerals are used for components similar to those of the above embodiments, and descriptions of the same points as those of the above embodiments are omitted as appropriate. The following modification examples can be combined as appropriate.

[0074] In the manufacturing method of the film roll body 100 described with reference to FIG. 9, each end portion (48, 49) in the width direction of each sheet (41, 42, 60) is cut so that the adhesive portions (609, 610) of the third sheet 60 constitute the adhesive portions (309, 310) of the base material 30. However, in the manufacturing method of the film roll body according to the present embodiment, it is not essential to cut each end portion in the width direction of each sheet so that the adhesive portion of the third sheet 60 constitutes the adhesive portion of the base material 30. The manufacturing method of the film roll body according to the present embodiment only needs to be able to prevent air from entering inside the gusset sheet that constitutes the "base material folded into two partial pieces along the width direction and having notches provided in a part of each end portion in the width direction" during manufacturing. The manufacturing method of the film roll body according to the present embodiment only needs to be able to prevent the "gusset sheet folded into two parts along the width direction" that constitutes the above base material from opening (unfolding) during manufacturing. Hereinafter, a modification example related to the manufacturing method of the film roll body will be described with reference to FIG. 10, particularly with respect to the film roll body manufactured by the manufacturing method according to the modification example.

[0075] FIG. 10 schematically illustrates an example of the state of the film roll body 100A according to a modified example before the cutting process. The film roll body 100A is a film roll body manufactured by the manufacturing method according to the modified example. The manufacturing method according to the modified example also includes a third sheet supply process and a cutting process, similar to the manufacturing method of the film roll body 100 described with reference to FIG. 9. The third sheet supply process of the manufacturing method according to the modified example is the same as the third sheet supply process of the manufacturing method of the film roll body 100. That is, the third sheet supply process of the manufacturing method according to the modified example is a step (process) of sandwiching the third sheet 60A between the pair of sheets (41, 42) that constitute the pair of sheet bodies of the stand-up pouch in the thickness direction. The third sheet 60A is a gusset sheet that constitutes the bottom material of the stand-up pouch. In particular, it is a gusset sheet that "is folded into two partial pieces along the width direction and has notches provided at a part of each end in the width direction" to constitute the bottom material. However, the bottom material constituted by the third sheet 60A may be different from the bottom material 30 of the stand-up pouch 10. For example, in the bottom material constituted by the third sheet 60A, the folded inner surfaces of the two partial pieces are not adhered to each other at each end in the width direction.

[0076] The third sheet 60A sandwiched between the pair of sheets (41, 42) in the thickness direction in the third sheet supply process of the manufacturing method according to the modified example is the same as the third sheet 60 of the film roll body 100. That is, the third sheet 60A is folded into two parts along the width direction, and holes (607A, 608A) penetrating the two parts are formed on each end (48, 49) side in the width direction. Also, the folded inner surfaces of the two parts of the third sheet 60A are adhered to each other at least partially at each end in the width direction. In the example shown in FIG. 10, they are adhered to each other at the adhesion parts (609A, 610A).

[0077] The cutting step of the manufacturing method according to the modification example is a step (process) of cutting each end portion (48, 49) in the width direction of each sheet (a pair of sheets (41, 42) and the third sheet 60A), and in the cutting step, each sheet is cut to the same width. Also in the cutting step of the manufacturing method according to the modification example, each end portion side in the width direction of the third sheet 60A where the holes (607A, 608A) are formed is cut so that the holes (607A, 608A) constitute "notches provided in a part of each end portion in the width direction of the base material".

[0078] However, in the cutting step of the manufacturing method according to the modification example, each end portion (48, 49) in the width direction of each sheet (a pair of sheets (41, 42) and the third sheet 60A) including the bonding portions (609A, 610A) is cut. In the example shown in FIG. 10, each sheet (a pair of sheets (41, 42) and the third sheet 60A) is cut on each end portion side in the width direction along the cutting line CLA.

[0079] As described above, also in the manufacturing method according to the modification example, before the cutting step, the folded inner surfaces of the two portions of the third sheet 60A are at least partially bonded to each other at each end portion in the width direction. Therefore, the manufacturing method according to the modification example can prevent the gusset sheet (the third sheet 60A) constituting "a base material folded into two partial pieces along the width direction and having notches provided in a part of each end portion in the width direction" from being opened in a step before the cutting step. The manufacturing method according to the modification example can prevent the third sheet 60A from being opened, for example, in "a step of moving the sheet group after the implementation of the third sheet supply step" implemented between the third sheet supply step and the cutting step. Therefore, the manufacturing method according to the modification example can prevent air from entering the inside of the gusset sheet constituting "a base material folded into two partial pieces along the width direction and having notches provided in a part of each end portion in the width direction" in a step before the cutting step.

Explanation of Signs

[0080] 10…Stand-up pouch, 11·12…Sheet body, 30…Base material, 31·32…Two partial pieces, 307·308…Notches, 305·306…Slanting lines, 301…First surface (the folded inner surface of each partial piece), 309·310…Adhesive part (the part where the inner surfaces of each partial piece are adhered to each other), 100, 100A…Film roll body, 41·42…A pair of sheets, 60, 60A…Third sheet, 607·608…Holes, 607A·608A…Holes, 609·610…The part where the inner surfaces of the two parts are adhered to each other, 609A·610A…The part where the inner surfaces of the two parts are adhered to each other

Claims

1. A pair of sheet bodies that are arranged to face each other in the thickness direction and are sealed to each other at both ends in the width direction, and at the lower end side in the length direction, are arranged so as to be sandwiched between the pair of sheet bodies in the thickness direction, and are a bottom material that is sealed to both of the pair of sheet bodies, and is folded into two partial pieces along the width direction, A notch is provided in a part of each end in the width direction, At both ends in the width direction, one of the two partial pieces is sealed to one of the pair of sheet bodies, and the other of the two partial pieces is sealed to the other of the pair of sheet bodies along a line that is inclined with respect to the vertical direction on the center side in the width direction from the notch, In the part of the notch, the pair of sheet bodies are directly sealed to each other, The folded inner surfaces of the two partial pieces are at least partially adhered to each other at each end in the width direction, A bottom material, A self-supporting bag comprising.

2. The folded inner surfaces of the two partial pieces are each composed of a heat-resistant resin, Japanese paper, or kraft paper, The folded inner surfaces of the two partial pieces are at least partially adhered to each other at each end in the width direction using a part coat, The self-supporting bag according to Claim 1.

3. A film roll body in which a plurality of self-supporting bags are continuously provided in the length direction and are wound around in the length direction, Each self-supporting bag is arranged such that the vertical direction of each self-supporting bag faces the length direction of the film roll body, Each self-supporting bag, A pair of sheet bodies that are arranged to face each other in the thickness direction and are sealed to each other at both ends in the width direction, At the lower end side in the length direction, it is arranged so as to be sandwiched between the pair of sheet bodies in the thickness direction, and is a bottom material that is sealed to both of the pair of sheet bodies, It is folded into two partial pieces along the width direction, A notch is provided in a part of each end in the width direction, At both ends in the width direction, one of the two partial pieces is sealed to one of the pair of sheet bodies, and the other of the two partial pieces is sealed to the other of the pair of sheet bodies along a line that is inclined with respect to the vertical direction on the center side in the width direction from the notch, In the part of the notch, the pair of sheet bodies are directly sealed to each other, The folded inner surfaces of the two partial pieces are at least partially adhered to each other at each end in the width direction, A bottom material, Comprising, A film roll body.

4. The folded inner surfaces of each of the two partial pieces are made of a heat-resistant resin, Japanese paper, or kraft paper. The folded inner surfaces of each of the two partial pieces are at least partially adhered to each other using a part coat at each end in the width direction. The film roll body according to claim 3.

5. A method for manufacturing a film roll body in which a plurality of self-standing bags, each having a base material folded into two partial pieces along the width direction and having a notch provided in a part of each end in the width direction, are continuously provided in the length direction and wound around in the length direction, A step of sandwiching a third sheet constituting the base material of the self-standing bag between a pair of sheets that are arranged opposite to each other in the thickness direction of the self-standing bag and are sealed to each other at both ends in the width direction, The third sheet is folded into two parts along the width direction. Holes penetrating the two parts are formed on each end side in the width direction of the third sheet. The folded inner surfaces of each of the two parts are at least partially adhered to each other at each end in the width direction. The step of sandwiching the third sheet. A step of cutting the pair of sheets and the third sheet sandwiched between the pair of sheets in the thickness direction to the same width, and cutting each end side in the width direction of each sheet so that the holes formed on each end side in the width direction of the third sheet constitute the notches of the base material. A method for manufacturing a film roll body, including the above steps.

6. In the step of cutting each end side in the width direction of each sheet, The adhered portions of the folded inner surfaces of each of the two parts of the third sheet, Are configured to be the adhered portions at each end in the width direction of the folded inner surfaces of each of the two partial pieces of the base material. Each end side in the width direction of each sheet is cut. The method for manufacturing a film roll body according to claim 5.

7. The folded inner surfaces of each of the two parts are made of a heat-resistant resin, Japanese paper, or kraft paper. The folded inner surfaces of each of the two parts are at least partially adhered to each other using a part coat at each end in the width direction. The method for manufacturing a film roll body according to claim 5 or 6.

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