Manufacturing method for pouch with spout

Abstract

To provide a manufacturing method for a pouch with a spout that is excellent in self-sustainability even when a content is poured out and reduced.MEANS FOR SOLVING THE PROBLEM: A pouch 50 with a spout of the present disclosure includes a pouch body 51 composed of a laminated sheet 60 having a thermoplastic resin layer 63 as at least the innermost layer and including at least a paper base material layer 62, and a spout body 41 joined to an upper edge part 24 of the pouch body 51. The pouch body 51 has an upper edge seal part 512, a body part 513 connected to a lower side of the upper edge seal part 512, and a bottom part 514 below the body part 513. The width W of the bottom part 514 and the height H of the pouch body 51 are in the range of 1.1×W≤H≤4.0×W.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a pouch with a spout that is filled with a fluid such as a liquid and from which the fluid is poured out through the spout. Manufacturing method Regarding. [Background technology]

[0002] As conventional pouches with a spout, Patent Document 1 shows a flat pouch-type pouch with a spout, a gusset-type pouch with a spout, and a stand-up pouch with a spout. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-145286 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the case of a flat pouch-type spout-equipped pouch of the prior art, when the spout-equipped pouch is stored standing upright with the spout facing upward, it cannot stand upright because it does not have a bottom.

[0005] On the other hand, the conventional gusset-type spout pouch and stand-up spout pouch can stand on their own when filled with contents because they have a bottom. Even if the spout is opened and the contents are poured out and reduced in volume, they can stand on their own up to a certain amount because they have a bottom. However, if more of the contents are poured out and the amount of the contents further decreases, the area of ​​the bottom of the gusset-type pouch with a spout and the stand-type pouch with a spout decreases, making it impossible for them to stand upright.

[0006] Furthermore, the material of the body of the pouch body of the conventional gusset-type spout pouch and stand-type spout pouch is a relatively soft film (hereinafter sometimes referred to as a flexible packaging film) made of a single-layer synthetic resin film, a laminated sheet of synthetic resin film, or a laminated sheet of synthetic resin film and metal foil, etc. Therefore, when the amount of content in the spout pouch decreases, the depth (width in the front-to-back direction) of the pouch body decreases, and the three-dimensional shape of the pouch body approaches a flat shape, which can cause the body of the pouch body to bend and make it unable to stand on its own.

[0007] The present disclosure provides a pouch with a spout that can always stand on its own even when the contents are reduced. Manufacturing method The objective is to provide the following. [Means for solving the problem]

[0008] As a means to solve the above problems, The spout-equipped pouch 50 of the present disclosure includes: A pouch body (51) made of a laminated sheet (60) including at least a paper substrate layer (62) and having a thermoplastic resin layer (63) at least as an innermost layer; A spout-equipped pouch (50) having a spout body (41) joined to the upper edge (24) of the pouch body (51). Manufacturing method And, The method for manufacturing the spout-equipped pouch 50 includes at least: a step of preparing a blank plate 10 made of the laminated sheet 60; a step of folding the blank sheet 10 along the intermediate horizontal folding line 21, overlapping the rear blank sheet 10a of the rear portion with the front blank sheet 10b of the front portion, and joining the inner surfaces of the side edge seal margins 36 of the left and right side edge portions 11 of the blank sheet 10 together; a step of joining the pouch body 51 and the spout body 41; a step of joining inner surfaces of the upper edge seal margin 33 of the upper edge portion 24 of the pouch body 51 together, The pouch body 51 is The pouch body 51 The upper edge portion 24 is provided with an upper edge seal portion 512 where the inner surfaces of the front blank plate 10b and the rear blank plate 10a made of the laminated sheet 60 are joined together; A body portion 513 is connected to the lower side of the upper edge seal portion 512, The body 513 includes front and back wall panels 31 and left and right side panels 32. A bottom portion 514 is provided below the body portion 513, The width W of the bottom 514 of the pouch body 51 and the height H of the pouch body 51 are in the range of 1.1×W≦H≦4.0×W.

[0009] Furthermore, the depth D of the bottom 514 of the pouch body 51 and the height H of the pouch body 51 may be 1.1×D≦H≦4.0×D.

[0010] Furthermore, the area S of the bottom 514 of the pouch body 51 and the height H of the pouch body 51 are 1.21×S≦H 2 It may be ≦16×S.

[0011] The spout-equipped pouch 50 of the present disclosure includes: A pouch body (51) made of a laminated sheet (60) including at least a paper substrate layer (62) and having a thermoplastic resin layer (63) at least as an innermost layer; A spout-equipped pouch (50) having a spout body (41) joined to the upper edge (24) of the pouch body (51). Manufacturing method And, The method for manufacturing the spout-equipped pouch 50 includes at least: a step of preparing a blank plate 10 made of the laminated sheet 60; a step of folding the blank sheet 10 along the intermediate horizontal folding line 21, overlapping the rear blank sheet 10a of the rear portion with the front blank sheet 10b of the front portion, and joining the inner surfaces of the side edge seal margins 36 of the left and right side edge portions 11 of the blank sheet 10 together; a step of joining the pouch body 51 and the spout body 41; a step of joining inner surfaces of the upper edge seal margin 33 of the upper edge portion 24 of the pouch body 51 together, The pouch body 51 is The pouch body 51 The upper edge portion 24 has an upper edge seal portion 512 where the inner surfaces of the front blank plate 10b and the back blank plate 10a made of the laminated sheet 60 are joined together, A body portion 513 is connected to the lower side of the upper edge seal portion 512, The body 513 includes front and back wall panels 31 and left and right side panels 32. A bottom portion 514 is provided below the body portion 513, The width W of the bottom 514 and the height H of the pouch body 51, and the depth D of the bottom 514 and the height H of the pouch body 51 are in the range of 1.1×D≦H≦4.0×D.

[0012] Furthermore, the area S of the bottom 514 of the pouch body 51 and the height H of the pouch body 51 are 1.21×S≦H 2 It may be ≦16×S.

[0013] The spout-equipped pouch 50 of the present disclosure includes: A pouch body (51) made of a laminated sheet (60) including at least a paper substrate layer (62) and having a thermoplastic resin layer (63) at least as an innermost layer; A spout-equipped pouch (50) having a spout body (41) joined to the upper edge (24) of the pouch body (51). Manufacturing method And, The method for manufacturing the spout-equipped pouch 50 includes at least: a step of preparing a blank plate 10 made of the laminated sheet 60; a step of folding the blank sheet 10 along the intermediate horizontal folding line 21, overlapping the rear blank sheet 10a of the rear portion with the front blank sheet 10b of the front portion, and joining the inner surfaces of the side edge seal margins 36 of the left and right side edge portions 11 of the blank sheet 10 together; a step of joining the pouch body 51 and the spout body 41; a step of joining inner surfaces of the upper edge seal margin 33 of the upper edge portion 24 of the pouch body 51 together, The pouch body 51 is The pouch body 51 The upper edge portion 24 has an upper edge seal portion 512 where the inner surfaces of the front blank plate 10b and the back blank plate 10a made of the laminated sheet 60 are joined together, A body portion 513 is connected to the lower side of the upper edge seal portion 512, The body 513 includes front and back wall panels 31 and left and right side panels 32. A bottom portion 514 is provided below the body portion 513, The area S of the bottom 514 of the pouch body 51 and the height H of the pouch body 51 are 1.21×S≦H 2 ≦16×S. [Effects of the Invention]

[0014] The pouch with spout 50 of the present disclosure is constructed using a laminated sheet 60 including a paper base layer 62, and the pouch body 51 is assembled to include a bottom 514. The relationship between the dimensions of the bottom 514 (width W, depth D, area S) and the height of the pouch body 51 is appropriate, so that the pouch can always stand on its own even when the contents decrease. Furthermore, the laminated sheet 60 including the paper base layer 62 that constitutes the trunk portion 513 of the pouch body 51 has hardness due to the paper base layer 62, which contributes to the pouch with a spout being able to stand on its own. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is a perspective view of a pouch with a spout. [Figure 2] FIG. 2 is a front view of the pouch with a spout. [Figure 3] FIG. 2 is a side view of the pouch with a spout. [Figure 4] FIG. 2 is a bottom view of the pouch with a spout. [Figure 5] This is the blank plate for the pouch body. [Figure 6] FIG. 1 is a front view of the pouch body (flat state) at an intermediate stage. [Figure 7] FIG. 1 is a perspective view of a pouch body at an intermediate stage (before the protruding portion is folded). [Figure 8] FIG. 1 is a perspective view of a pouch body (standing state) at an intermediate stage. [Figure 9] FIG. 2 is a front view of a pouch with a spout body. [Figure 10A] FIG. 2 is a plan view of the spout body. [Figure 10B] FIG. [Figure 10C] FIG. 2 is a bottom view of the spout body. [Figure 11] FIG. 2 is a partial cross-sectional view of the front of the cap. [Figure 12A] FIG. 1 is a cross-sectional view of one embodiment of a laminate sheet. [Figure 12B] FIG. 2 is a cross-sectional view of another embodiment of the laminate sheet. [Figure 12C] FIG. 2 is a cross-sectional view of another embodiment of the laminate sheet. [Figure 12D] FIG. 2 is a cross-sectional view of another embodiment of the laminate sheet. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the specifically illustrated embodiments or various specifically described structures. In each drawing, the size and proportions of the components may be changed or exaggerated for ease of understanding. Also, for clarity, unnecessary parts and repeated reference numerals may be omitted.

[0017] Furthermore, the numerical values ​​such as dimensions of each member and the names of materials described in this specification are examples of embodiments, and are not limited to these, and may be selected and used as appropriate. In this specification, terms specifying shapes or geometric conditions, such as parallel, orthogonal, vertical, center, etc., are intended to include not only their strict meanings but also substantially the same state.

[0018] FIG. 1 is a perspective view showing a pouch 50 with a spout of the present disclosure, FIG. 2 is a front view of the pouch 50 with a spout of the present disclosure, FIG. 3 is a side view of the pouch 50 with a spout of the present disclosure, and FIG. 4 is a bottom view of the pouch 50 with a spout of the present disclosure.

[0019] The spout-equipped pouch 50 of the present disclosure is composed of at least a pouch body 51 and a spout combination body 40. Here, the spout is synonymous with the spout combination body 40. The spout combination 40 includes a spout body 41 and a cap 42, which will be described later. However, if it is planned to attach the cap 42 in a later process, the spout body-equipped pouch 52, which is equipped with the spout body 41, can be handled in the same way as the spout-equipped pouch 50. In this case, the pouch with spout body 52 is included in the pouch with spout 50.

[0020] In this specification, directions are defined based on the shape of the spout-equipped pouch 50 when completed, with reference to Figure 2. That is, the up-down and left-right directions of the spout-equipped pouch 50 are defined based on the state in which the spout-equipped pouch 50 is placed with the bottom 514 facing downward and the spout-equipped combination 40 facing upward, as shown in Figure 2. The up-down direction may also be referred to as the vertical direction, and the left-right direction as the horizontal direction.

[0021] 1 and 2, the side edge seal margin 36 is tilted toward the back side of the drawing. The side in which the side edge seal margin 36 is tilted is the back side of the spout-equipped pouch 50, and the opposite side, which is the front side of the drawing, is the front side of the spout-equipped pouch 50. In other words, the direction of the front wall panel 31b is the front side.

[0022] 5 shows the blank plate 10 before the pouch body 51 is assembled. As will be described in detail later, the front side of FIG. 5 becomes the outside when the pouch body 51 is assembled, and the back side becomes the inside. The inside is the surface that comes into contact with the contents.

[0023] <Embodiments of the present disclosure> <Blank board> A blank plate 10 of a pouch body 51 of a spout-equipped pouch 50 according to an embodiment of the present disclosure is shown in FIG.

[0024] The blank plate 10 of the pouch body 51 of this embodiment is a single laminated sheet 60, which is made by laminating at least a base paper and a thermoplastic resin such as polyethylene as at least the innermost layer. The laminated sheet 60 is then cut to form a rectangular outer shape, and various folding lines are provided in the blank plate 10 to separate the forming plates for the various parts required to form the pouch body 51.

[0025] Furthermore, when describing the blank plate 10, the vertical direction of the drawing, which is the longitudinal direction of the blank plate 10, may be referred to as the vertical direction, and the horizontal direction of the drawing, which is the short side direction of the blank plate, may be referred to as the horizontal direction, with reference to the blank plate 10 shown in Figure 5. As will be described in detail later, the blank plate 10 has a middle horizontal folding line 21 in the center in the vertical direction, and the production of the pouch body 51 begins with the procedure of mountain-folding the middle horizontal folding line 21.

[0026] The side below the intermediate horizontal fold line 21 shown in FIG. 5 is the front side of the spout-equipped pouch 50, and the side above the intermediate horizontal fold line 21 is the back side of the spout-equipped pouch 50. The portion of the blank plate 10 that will become the front side of the spout-equipped pouch 50 is referred to as a front blank plate 10b, and the portion that will become the back side is referred to as a back blank plate 10a.

[0027] Unless otherwise specified, in each component of the blank plate 10 described below, the subscript "a" of each symbol indicates an element of the back blank plate 10a, and the subscript "b" indicates an element of the front blank plate 10b. For elements with both the subscripts "a" and "b," the symbol without a subscript includes both "a" and "b."

[0028] A pair of bottom plates 35 adjacent to the upper and lower sides of the intermediate horizontal folding line 21 of the blank plate 10 become the lower side when the pouch body 51 is assembled. The back side upper edge 24a located on the upper edge side of the blank plate 10 and the front side upper edge 24b located on the lower edge side of the blank plate 10 are brought together to form the upper side of the pouch body 51 when the pouch body 51 is assembled.

[0029] The front blank plate 10b and the back blank plate 10a are symmetrical with respect to the intermediate horizontal fold line 21, and when the inner surfaces of the back blank plate 10a and the front blank plate 10b are aligned and overlapped, each component (each forming plate, fold line, seal portion, etc., described below) overlaps.

[0030] The blank sheet 10 is folded along the middle horizontal folding line 21, and the back blank sheet 10a and the front blank sheet 10b, which are aligned and overlapped, are joined to produce an intermediate stage pouch body (flat state) 55 as shown in Figure 6. An intermediate stage pouch body (before the protruding portion is folded) 56 as shown in Figure 7 is then produced, followed by an intermediate stage pouch body (in a box-like state) 57 as shown in Figure 8, and finally a spout-equipped pouch 52 as shown in Figure 9 is produced. The contents are then filled into the spout-equipped pouch 52, and the cap 42 is attached and sealed, completing the procedure for producing the spout-equipped pouch 50; this manufacturing method will be described later. Here, the spout-equipped pouch 50 is a pouch with the cap 42 attached.

[0031] As will be described in detail later, the spout-equipped pouch 50 is made up of, from the top, an upper edge seal part 512 to which the spout main body 41 is joined, a body part 513, and a bottom part 514, and the above-mentioned upper side may also be referred to as the upper edge seal part side and the lower side as the bottom side (see Figure 2).

[0032] As described above, the rear blank plate 10a and the front blank plate 10b have vertically symmetrical shapes, so the shape of the blank plate 10 will be described with reference to the front blank plate 10b. As long as the function is not changed, the rear blanking plate 10a and the front blanking plate 10b may not be line-symmetric.

[0033] The blank plate 10 of the pouch body 51 of this embodiment is formed into a substantially rectangular outer shape using a laminated sheet 60 in which at least a base paper is laminated and at least an innermost layer is laminated with a thermoplastic resin such as polyethylene. Referring to Figure 5, the upper side is the back upper edge 24a, the left and right sides are the side edges 11, and the lower side is the front upper edge 24b. The blank plate 10 has a shape that is symmetrical with respect to a vertical line passing through the center of the blank plate 10 in the width direction. The laminated sheet 60 will be described later.

[0034] The front blank plate 10b is provided with a front first horizontal folding line 22b and a front second horizontal folding line 23b, which are arranged in the transverse direction from the intermediate horizontal folding line 21 to the front upper edge 24b. It is desirable that the front-side first horizontal folding line 22b and the front-side second horizontal folding line 23b are approximately parallel to the intermediate horizontal folding line 21 and the front-side upper edge portion 24b, respectively.

[0035] The front blank plate 10b has front vertical folding lines 12b extending inward from both front edge portions 11b with front edge seal margins 36b interposed therebetween. The front-side vertical folding line 12b is preferably approximately parallel to the front-side side edge 11b.

[0036] Further, the front blank plate 10b is provided with forming plates for each portion from the middle horizontal folding line 21 in the direction toward the front upper edge portion 24b.

[0037] Describing the main parts, a front bottom panel 35b is provided below the center of the intermediate horizontal folding line 21. A front wall panel 31b is connected to the underside of the front bottom panel 35b via a front first horizontal folding line 22b. A front upper edge seal margin 33b is connected to the underside of the front wall panel 31b via a front second horizontal folding line 23b.

[0038] Further, on both the left and right sides of the front bottom panel 35b, front protrusion margins 37b are connected via front protrusion vertical bending lines 16b. Front protrusion margins 37b are provided with front diagonal bending lines 13b.

[0039] The lower end of the oblique front folding line 13b is at the same position as the first bottom intersection point E, which is the intersection point between the front vertical folding line 12b and the middle horizontal folding line 21. The first bottom intersection point E is also common to the back blank plate 10a, and therefore the subscripts a and b are not added. The upper end of the front-side oblique folding line 13b is at the same position as the front-side second bottom intersection Fb, which is the intersection of the front-side protrusion vertical folding line 16b and the front-side first horizontal folding line 22b.

[0040] Note that the oblique fold line 13b on the front side may be located near the first bottom intersection point E without contacting it. Furthermore, the oblique fold line 13b on the front side may be located near the second bottom intersection point Fb without contacting it. Since the above-mentioned oblique folding line 13b on the front side is located close to but not in contact with the first bottom intersection E and the second bottom intersection Fb on the front side, sufficient folding performance is maintained while there is no excessive concentration of folding lines in any particular location, and a decrease in the strength of the laminated sheet of the front blank plate 10b can be prevented.

[0041] The lower end of oblique folding line 15b of the front body (upper side in FIG. 5) is at the same position as second bottom intersection point Fb of the front body. The upper end (lower side in FIG. 5) of the front body oblique folding line 15b is at the same position as the front upper intersection Gb, which is the intersection of the front vertical folding line 12b and the front second horizontal folding line 23b.

[0042] Furthermore, the oblique fold line 15b of the front body may be located near the front second bottom intersection point Fb without contacting it.Furthermore, the oblique fold line 15b of the front body may be located near the front upper intersection point Gb without contacting it. The oblique bending line 15b of the front body, the front second bottom intersection Fb, and the front upper intersection Gb are located close to each other without touching each other, which provides sufficient bending performance while preventing excessive concentration of bending lines at specific locations, thereby preventing a decrease in the strength of the laminated sheet 60 of the front blank plate 10b.

[0043] The first bottom intersection E, the front second bottom intersection Fb, and the front top intersection Gb are points where many fold lines converge. Six fold lines converge at the first bottom intersection E, five fold lines converge at the front second bottom intersection Fb, and five fold lines converge at the front top intersection Gb. Note that the number of fold lines passing through the intersections is counted as two. At each of the intersections, the folding lines may be avoided from concentrating to prevent a decrease in the strength of the laminated sheet 60 of the front blank plate 10b.

[0044] Furthermore, front side panels 32b are connected to the outside of both left and right sides of front wall panel 31b via front body diagonal bending lines 15b. Front wall panel 31b is trapezoidal, with the portion that meets front second horizontal bending line 23b forming the upper edge of the trapezoid and the portion that meets front first horizontal bending line 22b forming the lower edge of the trapezoid. Here, the upper edge is longer than the lower edge. The left and right front body diagonal bending lines 15b form the oblique sides of the trapezoid.

[0045] The front side panel 32b is a right triangle with two sides perpendicular to each other, the first front horizontal folding line 22b and the first front vertical folding line 12b. The part where the front side panel 32b and the first front horizontal folding line 22b meet is the base, which is the bottom 514 side of the pouch body 51.

[0046] In the present embodiment, the process of providing folding lines to the blank plate 10 (crisping) may be performed after the laminated sheet 60 is completed, and then the laminated sheet 60 may be fed to a machine that manufactures the spout-equipped pouches 50. Alternatively, the creasing may be performed in the machine that manufactures the spout-equipped pouches 50.

[0047] As the method for forming the creasing lines, an appropriate method is adopted from among known methods such as a platen method and a rotary die method. The laminated sheet 60 may be cut into sheets before the scoring process is performed, or the laminated sheet 60 may be supplied to the scoring process in a roll form.

[0048] Next, the punching process for punching the laminated sheet 60 to produce the blank plate 10 will be described. For the punching process, an appropriate method is selected from known methods such as the platen method and the rotary die method. The blank plate 10 may be formed directly from the rolled laminated sheet 60, or the sheet may be cut into sheets and then punched. The order of the creasing and punching processes does not matter, and they can be done simultaneously.

[0049] Alternatively, the rolled laminated sheet 60 slit to a predetermined roll width may be fed to a machine for manufacturing the blank plate 10, and the rolled laminated sheet 60 may be cut in the transverse direction to produce the blank plate 10.

[0050] The back blank sheet 10a and the front blank sheet 10b are symmetrical with respect to the middle horizontal folding line 21 and have the same shape.

[0051] Fig. 6 is a front view showing the shape of a pouch body (in a flat state) 55 at an intermediate stage when the spout-equipped pouch 50 is produced using the blank plate 10 shown in Fig. 5. By folding the intermediate horizontal folding line 21, the front upper edge 24b and the back upper edge 24a of the blank plate 10 are overlapped. The overlapped upper edge 24 forms the uppermost part of the pouch body (in a flat state) 55 at the intermediate stage. A rear blank plate 10a is provided on the rear side of the pouch body (flat state) 55 in the intermediate stage shown in Figure 6. The rear blank plate 10a cannot be seen with the naked eye, but when viewed through, it has approximately the same shape as the front blank plate 10b.

[0052] In Figure 6, the back blank plate 10a and the front blank plate 10b are overlapping, and each component has the same positional relationship when viewed through the drawing, within the range of manufacturing variations, so the notation "front side" and the suffixes to the symbols may be omitted in the explanation.

[0053] <Spout> The spout body 41 is shown in Figures 10A, 10B, and 10C. Figure 10B is a front view of the spout body 41, Figure 10A is a plan view, and Figure 10C is a bottom view.

[0054] Spout body 41 consists of a joining base 411 that is joined to pouch body 51, and a tubular part 412. Tubular part 412 has a through part 417 in the centre of its horizontal cross section through which the contents pass when being poured out, and an opening 415 that continues to through part 417 connects the inside of pouch 52 with spout body to the outside world.

[0055] Furthermore, the cylindrical portion 412 is provided with a male thread 414, which can be threaded into a female thread 421 provided on the inside of the cap 42 shown in FIG. 11 is a front view, and the right half is a cross-sectional view taken along a plane passing through the center point of the cap 42 when viewed from above.

[0056] Furthermore, a flange portion 416 is provided on the underside of the cylindrical portion 412. Flange portion 416 is supported when each step is carried out, such as the step of joining the spout main body 41 and the pouch main body 51, the step of filling the contents into the spout-equipped pouch 50 through the opening 415 of the spout main body 41, and the step of capping the spout main body 41 with the cap 42.

[0057] Like the tubular portion 412, the joining base portion 411 has a through portion 417 in the center of its horizontal cross section, and its outer peripheral surface is joined to the upper edge seal portion 512 of the pouch body 51. The inner surfaces of the front blank plate 10b and the back blank plate 10a are joined to each other so as to sandwich the joining base portion 411.

[0058] A pair of wing-like portions 413 is provided on both lateral sides of joint base 411. Wing-like portions 413 are smoothly connected to the tubular portion of joint base 411, and when joint base 411 and pouch body 51 are joined together, no small-curvature bend occurs in pouch body 51, stabilizing the joining between them. Furthermore, the presence of wing-like portions 413 increases the area of ​​spout joint portion 511, which is the joint between joint base 411 and pouch body 51, thereby further stabilizing the joining.

[0059] <Laminated sheet of blank board for pouch body> As mentioned above, the laminated sheet 60 used for the blank plate 10 is a laminated sheet 60 in which at least a paper base layer 62 is laminated and at least the innermost thermoplastic resin layer 63 is laminated with a thermoplastic resin such as polyethylene, but if necessary, the intermediate layer can be provided with a barrier layer 65 against water vapor, oxygen, and other substances, or a strength-enhancing layer 66.

[0060] Furthermore, when providing a printed layer of a pattern or the like on the pouch body 51 of this embodiment, it is usually printed on the surface of the paper base layer 62. However, if the paper base layer 62 does not have good printability, it is also possible to provide a printed layer of a pattern or the like on, for example, a biaxially oriented polyethylene terephthalate film, and laminate that film on any of the outer layers of the paper base layer 62.

[0061] The paper base layer 62 is preferably made of paper that is rigid and does not easily crack when folded along a folding line, but is not particularly limited thereto, and can be appropriately selected and used depending on the contents to be filled into the pouch body 51, taking into consideration factors such as water resistance (size). As specific examples, high-quality paper, bleached kraft paper, cup base paper, milk carton base paper, etc. can be suitably used, and the basis weight thereof is 80 to 320 g / m 2 The range is appropriate.

[0062] Resins that can be used for the innermost layer, and, if necessary, the outermost and intermediate thermoplastic resin layers (sealant layers) include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), ethylene-α-olefin copolymers polymerized using a single-site catalyst, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid random copolymer (EMAA), ethylene-methyl acrylate copolymer (EMA), ethylene-ethyl acrylate copolymer (EEA), ionomers, polypropylene and its copolymers, and polyester-based resins.From these, the most suitable resin can be selected and used depending on the contents to be filled and the storage and usage conditions.

[0063] Among the thermoplastic resins mentioned above, ethylene-methyl acrylate copolymer (EMA) and ethylene-methacrylic acid random copolymer (EMAA) are particularly excellent in thermal stability during processing such as extrusion coating, adhesion to various substrates, low-temperature heat sealing properties, and thin-film formability. Therefore, it is easy to extrusion-coat and laminate the outermost thermoplastic resin layer (sealant layer) at a relatively thin thickness, for example, 6 to 10 μm, which does not require a large thickness. This reduces the proportion of plastic material used and also provides cost benefits.

[0064] The thermoplastic resin layers of the innermost layer and, if necessary, the outermost layer, as described above, can be laminated by extrusion coating the resin on the laminate surface after subjecting the laminate surface to an easy-adhesion treatment such as anchor coating, corona treatment, or flame (flame) treatment as necessary, or by forming the thermoplastic resin into a film in advance and then laminating the film by using a known dry lamination or extrusion lamination (sandwich lamination) method.

[0065] When a barrier layer 65 is laminated as an intermediate layer of the laminate sheet 60, the barrier layer 65 can be formed of a metal foil such as aluminum foil, or a vapor-deposited film of a metal or inorganic oxide such as aluminum, silica, or alumina, deposited to a thickness of 20 to 100 nm on a substrate film such as a biaxially oriented polyethylene terephthalate film (hereinafter referred to as PET film), a biaxially oriented nylon film (hereinafter referred to as ON film), or a biaxially oriented polypropylene film (hereinafter referred to as OPP film). Alternatively, a saponified ethylene-vinyl acetate copolymer film (hereinafter referred to as EVOH film), a biaxially oriented nylon MXD6 film, a polyacrylonitrile film, or a PET film, ON film, or OPP film with a polyvinylidene chloride coating layer can be used.

[0066] Such a barrier layer 65 is usually preferably laminated on the inner surface of the paper base layer 62, since its barrier properties can be effectively utilized, but when a metal foil such as aluminum or a metal-deposited film is used for the barrier layer 65, the metallic feel can also be utilized in the design, so it can also be laminated on the outer surface of the paper base layer 62. The barrier layer 65 can be easily laminated by known methods such as dry lamination or extrusion lamination (sandwich lamination).

[0067] When a strength-improving layer 66 for increasing the mechanical strength is laminated as an intermediate layer of the laminate sheet 60, it is desirable that the material of the film used for the strength-improving layer 66 is excellent in puncture strength, bending strength, tensile strength, etc. Examples of such films include biaxially oriented polyethylene terephthalate film (hereinafter referred to as PET film), biaxially oriented nylon film (hereinafter referred to as ON film), and biaxially oriented polypropylene film (hereinafter referred to as OPP film).

[0068] The layer structure of the laminated sheet 60 of the blank plate 10 of the pouch body 51 of this embodiment is illustrated. FIG. 12A is a cross-sectional view of a laminated sheet 60 of a blank plate 10 consisting of three layers, and the layer structure is as follows, with " / " indicating the boundary between adjacent layers. (Front side) Outermost thermoplastic resin layer 61 / Paper base layer 62 / Innermost thermoplastic resin layer 63 (Back side)

[0069] FIG. 12B is a cross-sectional view of a laminated sheet 60 of two layers of blank plates 10, the layer structure of which is as follows. (Front side) Paper base layer 62 / innermost thermoplastic resin layer 63 (Back side) This is a layer structure in which the outermost thermoplastic resin layer 61 is removed from the three-layer laminated sheet 60 shown in FIG. 12A.

[0070] Furthermore, when the blank plate 10 is required to have barrier properties (water vapor, oxygen, aroma retention, etc.), it can be provided with a barrier layer 65. Fig. 12C is a cross-sectional view of a laminated sheet 60 of the blank plate 10 consisting of five layers, and the layer structure is as follows. (Surface side) Outermost thermoplastic resin layer 61 / Paper base layer 62 / Intermediate adhesive layer 64 / Barrier layer 65 / Innermost thermoplastic resin layer 63 (back side)

[0071] FIG. 12D is a cross-sectional view of a laminated sheet 60 of the blank plate 10 consisting of six layers, and the layer structure is as follows. (Surface side) Outermost thermoplastic resin layer 61 / Paper base layer 62 / Intermediate adhesive layer 64 / Barrier layer 65 / Strengthening layer 66 / Innermost thermoplastic resin layer 63 (rear side) This layer structure is such that a strength-improving layer 66 is added to the laminated sheet 60 of the blank plate 10 made up of five layers as shown in FIG. 12C.

[0072] The bonding between the layers of each laminated sheet 60 shown above is performed by known methods such as dry lamination, extrusion coating, adhesives, etc. Note that the layers used for bonding between the layers are thin and therefore may not be shown in the drawings. In particular, layers made of adhesive alone are relatively thin and therefore may not be shown in the drawings. Furthermore, printed layers such as patterns are thin and therefore may not be shown in the drawings.

[0073] <Procedure for making a pouch with a spout> Below, an intermediate stage pouch body (flat state) 55 is produced from blank plate 10 of pouch body 51, and then an intermediate stage pouch body (before folding of protruding portion) 56 is produced. Further, an intermediate stage pouch body (box-shaped state) 57 is produced, and then pouch 52 with a spout body is produced. An outline of the procedure for filling the contents through spout body 41, attaching cap 42 to spout body 41, and completing the package of pouch 50 with a spout will be described.

[0074] When one blank sheet 10 is folded along the intermediate horizontal folding line 21 and the back blank sheet 10a of the back side portion and the front blank sheet 10b of the front side portion are overlapped, the inner surfaces of the side edge seal margins 36 of the left and right side edge portions 11 are heat-sealed to form a bag-like shape with an opening at the upper edge portion 24.

[0075] The actual manufacturing method of the spout-equipped pouch 50 is not particularly limited, but to improve productivity, an apparatus may be used in which the steps of assembling the pouch body 51, sealing the joints, and attaching the spout (described later) are performed inline. A long printed laminated sheet 60 wound up in a roll may be unwound, and the pouch bodies 51 may be connected horizontally, followed by processing of folding lines and heat sealing of the side edge seal margins 36. Alternatively, if the process for attaching the spout body 41 has a different production capacity from the process for assembling the pouch body 51 (whether the production capacity is high or low), production efficiency can be improved by using an independent manufacturing device.

[0076] However, as long as the desired pouch 50 with a pouring spout can be obtained, the process is not limited to the above.

[0077] Next, the continuous pouch body 51 is cut into individual pouch bodies 51 to produce an intermediate stage pouch body (flat state) 55 having the shape shown in Figure 6, which is then molded into a three-dimensional shape to produce an intermediate stage pouch body (before the protruding portion is folded) 56 as shown in Figure 7.

[0078] <Preparation of the intermediate stage pouch body (before folding the protruding part)> A mandrel is inserted through the opened opening at upper edge 24 of pouch body (flat state) 55 in the intermediate stage, and bottom plate 35 is opened horizontally, giving pouch body 51 a three-dimensional shape. At this time, body oblique folding lines 15 are folded in a mountain fold when viewed from the outside of pouch body 51 (the same applies to the following descriptions of each folding line), so that triangular side panels 32 and trapezoidal wall panels 31 are folded, forming body 513 having a substantially rectangular horizontal cross section.

[0079] In the design, the horizontal cross-sectional shape of body portion 513 is assumed to be rectangular, but since pouch body 51 is made of flexible laminated sheet 60 mainly made of paper, it is made to be approximately rectangular, even if it is not a perfect rectangle.

[0080] In order to reliably fold the body oblique bending line 15, a mechanical member having a desired shape may be brought into contact with the body oblique bending line 15 from the outside.

[0081] Here, the front side panel 32b and the rear side panel 32a are each a right-angled triangle, with one side of the two sides sandwiching the right angle being adjacent or close to each other. The above-mentioned side is the line of symmetry, and the front side panel 32b and the rear side panel 32a are line-symmetrical with each other. The other side of the two pieces of the front side panel 32b that sandwich the right angle and the other side of the two pieces of the back side panel 32a that sandwich the right angle are in a substantially straight line, so the spout-equipped pouch 50 can stand up stably.

[0082] In addition, as the body diagonal fold line 15 is folded, the protrusion diagonal fold line 13 is folded in a mountain fold, and the inner surfaces of the protrusion margins 37 adjacent to the protrusion diagonal fold line 13 come into contact with or come close to each other, thereby forming the protrusion 515 of the pouch body 51.

[0083] It is desirable that the protruding portion oblique folding line 13 is folded almost completely back, and it may be folded by pinching it with a mechanical member or the like. When the protruding portion oblique folding line 13 is folded at approximately 180°, the protruding portion 515 protrudes downward from the pouch body 51 as shown in FIG.

[0084] Additionally, the side edge seal margin 36, where the inner surfaces are joined, is bent toward the back side of the pouch body 51. In the vicinity of the bottom panel 35, the back side panel 32a and the side edge seal margin 36 are almost in contact with or close to each other. However, the distance between the back side panel 32a and the side edge seal margin 36 increases toward the top of the pouch body 51.

[0085] In this way, an intermediate stage pouch body 56 (before the protrusions 515 are folded) is produced in which the protrusions 515 are not joined to the bottom 514.

[0086] <Making the intermediate stage pouch body (box state)> Next, the protruding portion 515 is bent toward the bottom plate 35 (inward) and joined to the bottom plate 35. At this time, the protruding portion vertical folding line 16 is folded back in a valley shape, and the portion of the first horizontal folding line 22 sandwiched between the side panel 32 and the protruding portion margin 37 is folded in a mountain shape.

[0087] The protrusion 515 and the bottom panel 35 may be joined using an adhesive (hot melt, etc.), adhesive tape, etc. If the outermost layer of the laminated sheet 60 of the blank plate 10 is provided with a thermoplastic resin layer (sealant layer), the thermoplastic resin layer may be heat-sealed.

[0088] In this way, an intermediate stage pouch body (in a box-like state) 57 is produced in which the protrusion 515 is joined to the bottom 514.

[0089] <Joining the spout body and forming the upper edge seal> In the pouch body (standing state) 57 in the intermediate stage where the upper edge 24 is not sealed, the upper edge 24 is opened and the spout body 41 is inserted into a predetermined position. The spout body 41 is inserted at approximately the horizontal center of the upper edge 24, at a position where the joining base 411 of the spout body 41 and the upper edge seal margin 33 of the pouch body 51 are aligned.

[0090] Thereafter, heat seal bars are pressed against both the front and back sides of the blank plate 10 of the pouch body 51 at the same time. The heat seal bar has a recess corresponding to the shape of the joint base 411 of the spout body 41, so that at the upper edge seal portion 512 of the pouch body 51, the joint between the inner surfaces of the blank plates 10 and the spout joint portion 511, which is the joint between the joint base 411 and the inner surface of the blank plate 10, are sealed simultaneously at an appropriate temperature and pressure.

[0091] As a method of forming the upper edge seal portion 512, the area intended to become the spout joint portion 511 may first be left unsealed, the inner surfaces of the blank plates 10 of the upper edge seal portion 512 may be joined together, and then the spout main body 41 may be inserted into the unsealed area before being joined. In the above case, the region of the upper edge seal portion 512 where the inner faces of the blank sheets 10 are sealed together and the inner faces of the side edge seal margins 36 may be sealed together at the same time.

[0092] As another joining procedure, the spout body 41 and the blank plate 10 may be sealed first, and then the inner surfaces of the blank plates 10 at the upper edge seal portion 512 may be sealed together.

[0093] As in the two examples above, by performing the sealing between the blank plates 10 and the sealing between the blank plates 10 and the spout body 41 in separate processes, conditions suitable for each seal can be selected, and overall optimal conditions for the upper edge seal portion 512 can be adopted.

[0094] The resin of the innermost thermoplastic resin layer 63 of the laminated sheet 60 of the blank plate 10 may be different from the resin of the spout body 41, in which case the sealing conditions for the two sealing modes described above may be different. The two sealing modes are the seal between the inner surfaces of the blank plates 10 and the seal between the inner surface of the blank plate 10 and the joining base 411 of the spout body 41.

[0095] Through the above-described procedure, a pouch 52 with a spout main body shown in FIG. 9 was completed.

[0096] <Filling pouches with spouts> Next, a filling nozzle for filling the contents is brought into contact with the spout body 41 of this spout body-equipped pouch 52, and the contents are filled. Thereafter, the cap 42 is screwed on, and the package of the spout-equipped pouch 50 is completed. At this time, the male thread 414 of the spout body 41 and the female thread 421 of the cap 42 are screwed on. When screwing on the cap 42, the flange portion 416 is fixed by a mechanical member to prevent the spout body 41 from rotating.

[0097] It should be noted that cap 42 may be of a stopper type instead of a screw type. During the stoppering operation, by supporting flange portion 416 in the same manner, the impact of stoppering can be absorbed, ensuring secure stoppering.

[0098] <Shape of pouch with spout> The spout-equipped pouch 50 of this embodiment can always stand on its own even when the amount of content decreases, and its shape will be explained using the drawings.

[0099] FIG. 2 is a front view of the spout-equipped pouch 50 of this embodiment, and shows the height H and width W of the bottom of the spout-equipped pouch 50. Height H of pouch body 51 of spout-equipped pouch 50 is defined as the distance from bottom 514 to upper edge 24 of pouch body 51. Width W of bottom 514 is defined as the length of bottom 514 in the left-right direction. In this embodiment, bottom 514 is assumed to be a rectangle (or a parallelogram), and therefore width W of bottom 514 is constant; however, if the shape is not rectangular, the maximum value of the length in the left-right direction may be defined as width W of bottom 514.

[0100] FIG. 3 is a side view of the spout-equipped pouch 50 of this embodiment, and shows the height H of the pouch body 51 of the spout-equipped pouch 50 and the depth D of the bottom portion. Height H of pouch body 51 is as described above in Fig. 2. Depth D of bottom 514 is defined as the length of bottom 514 in the front-to-rear direction. In the present embodiment, bottom 514 is assumed to be a rectangle (or a parallelogram), and therefore depth D of bottom 514 is constant; however, if bottom 514 is not rectangular, the maximum value of the length in the front-to-rear direction may be defined as depth D of bottom 514.

[0101] FIG. 4 is a bottom view of the spout-equipped pouch 50 of this embodiment, and shows the width W and depth D of the bottom of the spout-equipped pouch 50. The width W of the bottom 514 of the spout-equipped pouch 50 is as described above in Fig. 2. The depth D of the bottom 514 of the spout-equipped pouch 50 is as described above in Fig. 3.

[0102] The relationship between the height H of the pouch body 51 of the spout-equipped pouch 50 and the width W of the bottom 514 will be described with reference to FIG. Hereinafter, the height H of the pouch body 51 of the spout-equipped pouch 50 will be expressed as a numerical value, with mm being an example of the unit. Similarly, the width W of the bottom and the depth D of the bottom will also be expressed as a numerical value, with mm being an example of the unit. For the sake of simplicity, H, W, and D may be expressed as individual letters.

[0103] In the spout-equipped pouch 50 of this embodiment, it is preferable that the following relationship be satisfied. 1.1×W≦H≦4.0×W Since 1.1×W≦H, the spout-equipped pouch 50 of this embodiment has a so-called vertically elongated shape, which is easy to grasp with a human hand. Furthermore, since H≦4.0×W, the spout-equipped pouch 50 has a stable shape that is not too vertically elongated, and is stable when it is allowed to stand on its own and is unlikely to tip over. More preferably, 1.5×W≦H≦3.5×W, and most preferably, 2.0×W≦H≦3.0×W.

[0104] The relationship between the height H of the pouch body 51 of the spout-equipped pouch 50 and the depth D of the bottom 514 will be described with reference to FIG. In the spout-equipped pouch 50 of this embodiment, it is preferable that the following relationship be satisfied. 1.1×D≦H≦4.0×D Since 1.1×D≦H, the spout-equipped pouch 50 of this embodiment has a so-called vertically elongated shape, which is easy to grasp with a human hand. Furthermore, since H≦4.0×D, the spout-equipped pouch 50 has a stable shape that is not too vertically elongated, and is stable when it is allowed to stand on its own and is unlikely to tip over. More preferably, 1.5×D≦H≦3.5×D, and most preferably, 2.0×D≦H≦3.0×D.

[0105] The relationship between the height H of the pouch body 51 of the spout-equipped pouch 50 and the area S of the bottom 514 will be described with reference to Figures 2, 3 and 4. The area S of the bottom 514 of the spout-equipped pouch 50 is a numerical value, and an example of the unit is cm 2 For the sake of simplicity, the area of ​​the bottom 514 is not always expressed as S, but may be expressed as a single letter S.

[0106] In the spout-equipped pouch 50 of this embodiment, it is preferable that the following relationship be satisfied. 1.21×S≦H 2 ≦16×S 1.21×S≦H 2 Since H≦16×S, the spout-equipped pouch 50 of this embodiment has a so-called vertically long shape, which is easier to grasp with a human hand. Furthermore, since H≦16×S, it is not longer than necessary, and has a more stable shape, and when the spout-equipped pouch 50 is allowed to stand on its own, it is stable and less likely to tip over. More preferably, 2.25×S≦H 2 ≦12.25×S, and most preferably 4×S≦H 2 ≦9×S.

[0107] The bottom of the spout-equipped pouch 50 shown in FIG. 4 is rectangular, and the relationship between the width W of the bottom 514, the depth D of the bottom 514, and the area S of the bottom 514 is as follows. W×D=S If the shape of the bottom 514 is not rectangular, the size of the surface of the bottom 514 can also be expressed by the area S of the bottom 514 instead of the width W of the bottom 514 and the depth D of the bottom 514.

[0108] Here, when determining the range of height H, its minimum value is 1.1×W and 1.1×D, calculated from the width W and depth D of bottom 514. When bottom 514 is rectangular, the minimum value of its area S is as follows: 1.1×W×1.1×D=(1.1×1.1)×(W×D)=1.21×S Furthermore, the maximum values ​​of height H calculated from width W and depth D of bottom 514 are 4.0×W and 4.0×D, respectively. When bottom 514 is rectangular, the maximum value of height H calculated from its area S is as follows: 4.0×W×4.0×D=(4.0×4.0)×(W×D)=16×S

[0109] From the above explanation, 1.21×S≦H 2 ≦16×S (reprinted) However, even if either W or D is large and the above formula is established, the shape of bottom 514 may be long and narrow, and spout-equipped pouch 50 may not be able to stand on its own stably. In this case, if the following relationship is also established, spout-equipped pouch 50 may be able to stand on its own stably. H≦3.5×H and H≦3.5×D

[0110] In order for the spout-equipped pouch 50 to be able to stand on its own more stably, the following relationship may also be established. H≦3.0×H and H≦3.0×D

[0111] In addition, when the spout-equipped pouch 50 of this embodiment is intended to be held in one hand, the width W of the bottom 514 is preferably 20 mm or more and 80 mm or less. Similarly, the depth D of the bottom 514 is preferably 20 mm or more and 80 mm or less. Furthermore, the weight of the contents is preferably 50 g or more and 500 g or less.

[0112] Furthermore, when the spout-equipped pouch 50 of this embodiment is intended to be held in both hands, the width W of the bottom 514 is preferably 40 mm or more and 200 mm or less. Similarly, the depth D of the bottom 514 is preferably 40 mm or more and 200 mm or less. The weight of the contents is preferably 50 g or more and 2 kg or less.

[0113] The above can be summarized as follows: 1.1×W≦H≦4.0×W 1.1×D≦H≦4.0×D 1.21×S≦H 2 ≦16×S The above may be used alone or more preferably in combination with one another.

[0114] By combining the above conditions, the shape becomes easier to grasp with a human hand, is not longer than necessary, and is more stable, making the pouch with spout 50 more stable and less likely to tip over when it is placed upright.

[0115] As shown in Figures 2, 3, and 4, the spout-equipped pouch 50 of this embodiment has a bottom 514. As shown in Figure 4, the bottom 514 includes a bottom plate 35 and a protruding portion 515, and the bottom plate 35 and the protruding portion 515 are joined together. Therefore, the bottom 514 has a rigid structure and is not easily deformed even when the contents are sucked out and the internal pressure of the spout-equipped pouch 50 becomes negative, or when it is subjected to an external force. Therefore, the spout-equipped pouch 50 can remain stably and independently standing.

[0116] Furthermore, the laminated sheet 60 constituting the spout-equipped pouch 50 of this embodiment is harder than a laminated sheet made of only a flexible packaging film because it includes the paper base layer 62. Even if the amount of content decreases and the shape retention provided by supporting the content deteriorates, the spout-equipped pouch 50 of this embodiment will not break midway through the body of the pouch body 51 because the laminated sheet 60 is hard, and the spout-equipped pouch 50 of this embodiment will continue to stand stably on its own. [Example]

[0117] The following examples further illustrate the embodiments of the present disclosure.

[0118] Example 1 In Example 1, the pouch 50 with a spout shown in FIG. 1 was produced using the blank plate 10 of this embodiment shown in FIG.

[0119] One blank sheet 10 shown in Fig. 5 was prepared, folded along the intermediate horizontal folding line 21, and the inner surfaces of the blank sheets 10 were aligned and overlapped. Then, as shown in Fig. 6, the side edge seal margins 36 on both opposing sides were heat-sealed, and an intermediate stage pouch body (flat state) 55 was produced with the upper edge 24 left unsealed.

[0120] Then, an intermediate stage pouch body (flat state) 55 was erected to form a body portion 513 and a bottom portion 514. Then, an intermediate stage pouch body (before folding of protruding portion) 56 was formed, as shown in Fig. 7. At this stage, protruding portion 515 was present without being folded, extending downward from side panel 32.

[0121] Further, the protruding portion 515 is bent toward the bottom plate 35, and the protruding portion 515 and the bottom plate 35 are joined with hot melt to form an intermediate stage pouch body (in a box-like state) 57 as shown in Fig. 8. At this stage, the upper edge 24 is not joined and is open.

[0122] Next, the spout body 41 is heat-sealed to the upper edge seal portion 512, and the area near the upper edge 24 is heat-sealed over the entire width, completing a pouch 52 with a spout body attached, as shown in Figure 9.

[0123] To produce the spout-equipped pouch 50 of this embodiment, a laminated sheet 60 of blank plates 10 was first prepared. The layer structure was as follows (see FIG. 12D): (Outside side) Outermost thermoplastic resin layer 61 (LDPE 20μm Japan Polyethylene LC520) Printed layer of picture etc. (gravure printing on the outer surface of the paper base layer 62) / Paper base layer 62 (base paper for liquid paper containers 150g / m 2 Nippon Paper Industries) / Intermediate adhesive layer 64 (EMAA 20μm Mitsui Dow Polychemicals N0908N) / Barrier layer 65 (aluminum foil 7 μm Toyo Aluminum 1N30) / Strengthening layer 66 (PET film 12μm Toyobo E-5102) / The innermost thermoplastic resin layer 63 (LDPE 50 μm Japanese polyethylene LC520) (inner side)

[0124] A method for manufacturing the laminated sheet 60 will now be described.

[0125] First, the rolled paper substrate layer 62 was unwound, and predetermined patterns and characters were gravure printed at predetermined positions, and then the paper substrate layer 62 was wound up again into a roll.

[0126] In the next step, a roll of the strength-improving layer 66 (PET film, 12 μm) was unwound, and an adhesive was applied to one side of it. Then, a roll of the barrier layer 65 (aluminum foil, 7 μm) was unwound and dry-laminated. The film formed by joining the two films was then wound up again into a roll.

[0127] Next, the roll-shaped printed paper base layer 62 was unwound, and the surface of the barrier layer 65 of the film bonded in the above process (the film having the barrier layer 65 and the strength-enhancing layer 66 bonded) was laminated to the inner surface of the paper base layer 62 by extrusion lamination (sandwich lamination), with a molten intermediate adhesive layer 64 (EMAA 20 μm) interposed therebetween.

[0128] Next, on the opposite side (inner side) of the strength-improving layer 66 to the paper base layer 62, an innermost thermoplastic resin layer 63 (LDPE 40 μm) was formed by extrusion lamination.

[0129] Next, an outermost thermoplastic resin layer 61 (LDPE 20 μm) was formed on the printed surface of the paper substrate layer 62 by extrusion lamination.

[0130] In addition, in order to improve the bonding strength between the bonding layers, anchor coating treatment, corona treatment, flame treatment, etc. may be performed as needed. Alternatively, ozone treatment may be performed on the molten resin.

[0131] Next, the laminated sheet 60 was subjected to processes such as scoring and punching, and the blank plate 10 was completed.

[0132] The blank plate 10 was rectangular, measuring 272 mm in length and 112 mm in width, and had a 5 mm wide side edge seal margin 36 provided on both side edges 11 as a seal margin at the peripheral edge. In addition, upper edge seal margins 33 each having a width of 8 mm were provided on both the upper and lower upper edges 24 of the blank plate 10 .

[0133] In the widthwise center of the blank plate 10, a bottom panel 35, a first horizontal folding line 22, a wall panel 31, a second horizontal folding line 23, and an upper edge sealing margin 33 are provided in this order from the intermediate horizontal folding line 21 in the vertical direction.

[0134] Further, protruding portion margins 37 are provided on both outer sides of the bottom plate 35 via protruding portion vertical bending lines 16 .

[0135] In addition, side panels 32 are provided on both sides of the wall panel 31 via the body oblique bending lines 15.

[0136] The blank sheets 10 were folded along the intermediate horizontal folding lines 21 so that the inner surfaces of the sheets were in contact with each other, and the side edge seals 36 were heat-sealed to produce an intermediate stage pouch body (flat state) 55 with the upper edge seal 33 left unsealed (see Figure 6).

[0137] Next, a mandrel was inserted into this intermediate stage pouch body (flat state) 55 through the opening of the unsealed upper edge 24, and the body portion diagonal folding line 15 was folded, and the wall panel 31 and the side panel 32 were folded, and the body portion 513 was formed.

[0138] At the same time, the portion of the intermediate horizontal fold line 21 adjacent to the bottom panel 35 is returned from its folded state, and the front bottom panel 35b and the back bottom panel 35a become approximately a single flat plate, forming the bottom portion 514.

[0139] Furthermore, when the protruding portion oblique folding line 13 was also folded in a direction in which the inner faces of the blank plates 10 came into contact with each other, the protruding portion 515 protruded downward from the pouch body 51 (see FIG. 7). During this operation, in order to ensure that the protruding portion oblique bending line 13 was bent properly, the protruding portion 515 was pinched from both sides with mechanical members, and the protruding portion oblique bending line 13 was bent in a crease.

[0140] Thereafter, the protruding portion 515 was bent toward the bottom plate 35 and heat-sealed to the bottom plate 35. For the heat-sealing, hot air was blown onto the outermost thermoplastic resin layer 61 of the laminated sheet 60 of the blank plate 10 at the respective joint locations of the protruding portion 515 and the bottom plate 35, and then the protruding portion 515 was bent and pressure was applied to the joint locations.

[0141] Through the above procedure, an intermediate stage pouch body (standing state) 57 was formed in which the upper edge seal portion 33 was left unsealed and the bottom portion 514 was formed (see FIG. 8). Its dimensions were such that the width W of the bottom portion 514 was 50 mm, the depth D of the bottom portion 514 was 50 mm, the height H of the pouch body 51 was 110 mm, and the width in the lateral direction of the upper edge portion 24 was 110 mm.

[0142] The joining base 411 of the spout body 41 was inserted into approximately the center of the width of the unsealed upper edge 24 of the intermediate stage pouch body (standing state) 57, and the joining base 411 and the upper edge seal margin 33 were aligned to the desired position. Then, a heat seal bar set at an appropriate temperature for heat sealing was used to apply pressure to both the front and back of the upper edge seal margin 33 to perform heat sealing.

[0143] The heat sealing surface of the heat seal bar has a shape (concave shape) that reflects the shape of the joint base 411, and appropriate heat sealing was applied to both the heat sealing of the spout joint 511 and the joint of the upper edge seal portion 512 other than the spout joint 511.

[0144] Next, the contents were filled into the pouch 52 with the spout body to which the spout body 41 was attached. A filling nozzle for filling liquid (fluid) contents was pressed against opening 415 at the top of tubular portion 412 of spout main body 41, and the contents were filled. In this example, 200 ml of sports drink was filled.

[0145] Next, pouch 52 with a spout body filled with the contents was transported to the capping device. Then, cap 42 was attached to the top of spout body 41, and then cap 42 was rotated in the direction in which it was screwed on by the capping jig. When the cap 42 was rotated to the predetermined position, the rotation stopped and the cap 42 settled into the intended position. Then, the locking function was activated, providing a stable seal.

[0146] The temperature of the contents when filling can be set to various temperatures, such as cold (approximately 10°C or below), normal temperature (room temperature), or high temperature (desired temperature for sterilization, etc.). In particular, it is desirable to fill jelly-like contents, which are semi-solid at normal temperature but liquid at high temperatures, at a high temperature.

[0147] The temperature of the spout-equipped pouch 50 that has been filled with the contents and sealed with the cap 42 may be changed in a subsequent process. For example, the spout-equipped pouch 50 filled at a high temperature may be cooled by passing through a cooling device (for example, a cold water shower or a cold air oven). Also, the spout-equipped pouch 50 filled at room temperature may be heated in a heating device (for example, a hot water shower or a hot air oven) to thermally sterilize the contents.

[0148] In this example, the sports drink was filled at 90°C and then cooled to 40°C through a cooling device.

[0149] Through the above procedure, a package of the spout-equipped pouch 50 filled with the sports drink of this example was completed.

[0150] <Example 2> In this example, a spout-equipped pouch 50 was prepared in which the width W of the bottom 514 was 50 mm, the depth D was 50 mm, the height H of the pouch body 51 was 55 mm, and the lateral width of the upper edge 24 was 60 mm. Apart from the size of the spout-equipped pouch 50 being different, the material of the laminated sheet 60, the manufacturing method of the blank plate 10, the manufacturing method of the pouch body 51, the attachment method of the spout body 41, etc. were the same as in Example 1.

[0151] 100 ml of sports drink was filled from opening 415 at the top of tubular portion 412 of spout main body 41. Other methods for filling the contents, such as the method for attaching cap 42 and the method for cooling the packaging bag of spout-equipped pouch 50, were the same as in Example 1.

[0152] Example 3 In this example, a spout-equipped pouch 50 was prepared in which the width W of the bottom 514 was 50 mm, the depth D was 50 mm, the height H of the pouch body 51 was 200 mm, and the lateral width of the upper edge 24 was 60 mm. Apart from the size of the spout-equipped pouch 50 being different, the material of the laminated sheet 60, the manufacturing method of the blank plate 10, the manufacturing method of the pouch body 51, the attachment method of the spout body 41, etc. were the same as in Example 1.

[0153] 360 ml of sports drink was filled from opening 415 at the top of tubular portion 412 of spout main body 41. Other methods for filling the contents, such as the method for attaching cap 42 and the method for cooling the packaging bag of spout-equipped pouch 50, were the same as in Example 1.

[0154] Example 4 In this example, a spout-equipped pouch 50 was prepared in which the width W of the bottom 514 was 150 mm, the depth D was 150 mm, the height H of the pouch body 51 was 300 mm, and the lateral width of the upper edge 24 was 60 mm. Apart from the size of the spout-equipped pouch 50 being different, the material of the laminated sheet 60, the manufacturing method of the blank plate 10, the manufacturing method of the pouch body 51, the attachment method of the spout body 41, etc. were the same as in Example 1.

[0155] Five liters of automotive antifreeze was filled from opening 415 at the top of cylindrical portion 412 of spout main body 41. Since filling was carried out at room temperature, no subsequent cooling process was performed. Other than that, the filling method of the contents and the method of attaching cap 42 were the same as in Example 1.

[0156] <Example 5> The shape, manufacturing method, contents, etc. of the spout-equipped pouch 50 were the same as those in Example 1, except that the layer structure of the laminated sheet 60 of the blank plate 10 was changed as follows (see FIG. 12C). (Outside side) Outermost thermoplastic resin layer 61 (LDPE 20μm Japan Polyethylene LC520) Printed layer of picture etc. (gravure printing on the outer surface of the paper base layer 62) / Paper base layer 62 (Nippon Paper Industries Co., Ltd. Liquid paper container base paper 150 g / m 2 ) / Intermediate adhesive layer 64 (EMAA 20μm Mitsui Dow Polychemicals N0908N) / Barrier layer 65 (silica vapor deposition PET 12 μm Dai Nippon Printing IB-PET-UBP) / The innermost thermoplastic resin layer 63 (LDPE 40 μm Japanese polyethylene LC520) (inner side)

[0157] <Comparative Example> <Comparative Example 1> In this comparative example, a pouch with a spout was prepared in which the width W of the bottom 514 was 50 mm, the depth D was 50 mm, the height H was 250 mm, and the horizontal width of the upper edge was 60 mm. Apart from the size of the spout pouch being different, the material of the laminated sheet, the manufacturing method of the blank plate, the manufacturing method of the pouch body, the attachment method of the spout body, etc. were the same as in Example 1. The spout assembly used was the same spout assembly 40 as in the example.

[0158] 450 ml of sports drink was filled from opening 415 at the top of tubular portion 412 of spout main body 41. Other methods such as filling the contents, attaching cap 42, and cooling the packaging bag of the spout-equipped pouch were the same as in Example 1.

[0159] <Comparative Example 2> In this comparative example, a pouch with a spout was prepared having a bottom width W of 50 mm, a depth D of 50 mm, a height H of 50 mm, and a horizontal width of 60 mm at the top edge. Apart from the size of the spout pouch being different, the material of the laminated sheet, the manufacturing method of the blank plate, the manufacturing method of the pouch body, the attachment method of the spout body, etc. were the same as in Example 1. The spout assembly used was the same spout assembly 40 as in Example.

[0160] 80 ml of sports drink was filled from opening 415 at the top of tubular portion 412 of spout main body 41. Other than that, the method of filling the contents, the method of attaching cap 42, the method of cooling the packaging bag of spout-equipped pouch 50, etc. were the same as in Example 1.

[0161] <Comparative Example 3> In this comparative example, a pouch with a spout was prepared, having a bottom width W of 50 mm, a depth D of 50 mm, a height H of 110 mm, and a horizontal width of the upper edge of 110 mm. However, the layer structure of the laminated sheet was as follows, and no paper base layer was provided. (Outside side) Outermost film base layer (PET film 12μm Toyobo E-5102) / Printed layer (gravure printing on the inner surface of the outermost film base layer) / Barrier layer (aluminum foil 7μm Toyo Aluminum 1N30) / Strength improvement layer (biaxially oriented nylon 15μm Toyobo N-5342) / The innermost thermoplastic resin layer (LDPE 60μm Japanese polyethylene LC520) (inner side)

[0162] The laminated sheets for the spout-equipped pouch of Comparative Example 3 were laminated using known joining methods such as dry lamination and extrusion lamination. Furthermore, a pattern or the like was printed on the inner surface of the PET film using known gravure printing. Other than the material of the laminated sheets and the shape of the pouch body, the manufacturing method of the blank plate, the manufacturing method of the pouch body, the attachment method of the spout body, and the like were the same as in Example 1. The same spout assembly 40 as in the Example was used as the spout assembly.

[0163] 200 ml of sports drink was filled from opening 415 at the top of tubular portion 412 of spout main body 41. Other methods for filling the contents, such as the method for attaching cap 42 and the method for cooling the packaging bag of spout-equipped pouch 50, were the same as in Example 1.

[0164] <Evaluation> 100 spout-equipped pouch packaging bags filled with the sports drinks of Examples 1 to 3 and 5 and Comparative Examples 1 and 2 were prepared. Ten subjects sucked the contents of 10 of each sample and drank them.

[0165] Three spout-equipped pouch packaging bags filled with the automotive antifreeze solution of Example 4 were prepared. Three test subjects were able to lift the pouch packaging bags with both hands and pour the automotive antifreeze solution into the automobile radiator.

[0166] In the package of the spout-equipped pouches of Comparative Example 1, after they were made to stand on their own on a tray, some of the spout-equipped pouches fell over when being carried by hand.

[0167] The spout-equipped pouch packaging of Comparative Example 2 was cubic in shape and difficult to grip with a human hand, and was particularly unsuitable for gripping by pinching it between the thumb and other fingers.

[0168] In the case of the pouch package of Comparative Example 3, when the contents were poured out and reduced in volume, the body of the pouch body bent, and the pouch was deformed so that the spout faced downwards, making it impossible for the pouch of this Comparative Example to stand on its own.

[0169] All of the packages of pouches with spouts in Examples 1 to 3 and 5 could be carried without any problems after being set up on a tray and carried by hand without tipping over. Furthermore, even when the content was poured out and reduced, the shape of the pouch with a pouring spout did not change significantly and it maintained its self-standing ability.

[0170] In the package of the spout-equipped pouch of Example 4, even when the contents were poured out and reduced in volume, the shape of the spout-equipped pouch did not change significantly and it maintained its self-standing ability. [Explanation of symbols]

[0171] 10 Blank Board 10a Back blank plate 10b Front blank plate 11 Side edge 12 Vertical fold line 13. Protruding diagonal fold line 15. Body diagonal fold line 16. Vertical fold line of protruding part 21 Middle horizontal fold line 22 First horizontal fold line 23 Second horizontal fold line 24 Upper edge 31 Wall Panel 32 Side plate 33 Upper edge seal 35 Bottom plate 36 Side edge seal allowance 37 Protruding part allowance 40 Spout assembly 41 Spout body 411 Joint base 412 Cylinder part 413 Wings 414 Male thread 415 Opening 416 Flange part 417 Penetration 42 Cap 421 Female thread 50 pouches with spouts (with caps) 51 Pouch body 511 Spout joint 512 Upper edge seal 513 Torso 514 Bottom 515 Protrusion 52 Pouch with spout 55 Pouch body in intermediate stage (flat state) 56 Pouch body in intermediate stage (before folding of protruding part) 57 Pouch body in intermediate stage (boxed state) 60 Laminated Sheet 61 Outermost thermoplastic resin layer 62 Paper base layer 63 Innermost thermoplastic resin layer 64 Middle adhesive layer 65 Barrier Layer E First bottom intersection F Second bottom intersection G upper intersection D Depth of the bottom of the pouch with the spout H Pouch body height W Width of the bottom of the pouch with the spout

Claims

1. A pouch body composed of a laminated sheet having a thermoplastic resin layer as at least the innermost layer and including at least a paper base layer; a spout body joined to an upper edge portion of the pouch body, The method for producing the pouch with a spout includes at least preparing a blank plate made of the laminated sheet; a step of folding the blank plate along the intermediate horizontal folding line, overlapping the rear blank plate of the rear portion with the front blank plate of the front portion, and joining the inner surfaces of the side edge seal margins of the left and right side edges of the blank plate together; a step of joining the pouch body and the spout body; and joining the inner surfaces of the upper edge portions of the pouch body and the pouch body together, The pouch body includes: an upper edge seal portion at an upper edge of the pouch body, where inner surfaces of a front blank plate and a back blank plate made of the laminated sheet are joined together; A body portion is connected to the lower side of the upper edge seal portion, The body includes front and back wall panels and left and right side panels, A bottom portion is provided below the body portion, A method for manufacturing a pouch with a spout, wherein the width W of the bottom of the pouch body and the height H of the pouch body are 1.1 x W ≦ H ≦ 4.0 x W.

2. 2. The method for manufacturing a pouch with a spout according to claim 1, wherein the depth D of the bottom of the pouch body and the height H of the pouch body are in the range of 1.1 x D≦H≦4.0 x D.

3. 3. The method for manufacturing a pouch with a spout according to claim 1, wherein the area S of the bottom of the pouch body and the height H of the pouch body satisfy the relationship 1.21 x S ≦ H2 ≦ 16 x S.

4. A pouch body having a thermoplastic resin layer as at least the innermost layer and composed of a laminated sheet including at least a paper base layer; a spout body joined to an upper edge portion of the pouch body, The method for producing the pouch with a spout includes at least preparing a blank plate made of the laminated sheet; a step of folding the blank plate along the intermediate horizontal folding line, overlapping the rear blank plate of the rear portion with the front blank plate of the front portion, and joining the inner surfaces of the side edge seal margins of the left and right side edges of the blank plate together; a step of joining the pouch body and the spout body; and joining the inner surfaces of the upper edge portions of the pouch body and the pouch body together, The pouch body includes: an upper edge seal portion at an upper edge of the pouch body, where inner surfaces of a front blank plate and a back blank plate made of the laminated sheet are joined together; A body portion is connected to the lower side of the upper edge seal portion, The body includes front and back wall panels and left and right side panels, A bottom portion is provided below the body portion, A method for manufacturing a pouch with a spout, wherein the depth D of the bottom of the pouch body and the height H of the pouch body are 1.1 x D ≦ H ≦ 4.0 x D.

5. 5. The method for manufacturing a pouch with a spout according to claim 4, wherein the area S of the bottom of the pouch body and the height H of the pouch body satisfy the relationship 1.21 x S ≤ H2 ≤ 16 x S.

6. A pouch body having a thermoplastic resin layer as at least the innermost layer and composed of a laminated sheet including at least a paper base layer; a spout body joined to an upper edge portion of the pouch body, The method for producing the pouch with a spout includes at least preparing a blank plate made of the laminated sheet; a step of folding the blank plate along the intermediate horizontal folding line, overlapping the rear blank plate of the rear portion with the front blank plate of the front portion, and joining the inner surfaces of the side edge seal margins of the left and right side edges of the blank plate together; a step of joining the pouch body and the spout body; and joining the inner surfaces of the upper edge portions of the pouch body and the pouch body together, The pouch body includes: an upper edge seal portion at an upper edge of the pouch body, where inner surfaces of a front blank plate and a back blank plate made of the laminated sheet are joined together; A body portion is connected to the lower side of the upper edge seal portion, The body includes front and back wall panels and left and right side panels, A bottom portion is provided below the body portion, A method for manufacturing a pouch with a spout, wherein the area S of the bottom of the pouch body and the height H of the pouch body are 1.21 x S ≦ H2 ≦ 16 x S.

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