JP7326897B2 - pouch - Google Patents

Description

The present invention relates to pouches.

BACKGROUND ART Conventionally, a pouch is known that has a spout from which content including liquid, powder, granules, or the like can be poured. In such a pouch, the pouch is opened by cutting a part of the spout along the half-cut line starting from the notch formed in the spout, and the contents are poured out from the spout. is configured as

A plurality of such pouches with spouts are usually transported in a state in which they are contained in a cardboard box. As a result, the spout may break along the half-cut line starting from the notch, and the contents may leak from the spout.

In order to prevent such unsealing during transportation, the length of the linear first half-cut line positioned so as to sandwich the tip of the notch is increased, and the linear first half-cut line positioned inside the first half-cut line is lengthened. It is considered to shorten the length of the second half-cut line, set the starting point of the first half-cut line to the outer edge of the notch side of the spout seal part, and separate the starting point of the second half-cut line from the tip of the notch by 2 mm or more. (See, for example, Patent Document 1).

JP 2011-246174 A

At present, the notch is formed by punching after forming the half-cut line, but the position of the notch with respect to the half-cut line may be slightly shifted.

In the pouch disclosed in Patent Document 1, the first half-cut line is straight. Even if the package is opened from the notch, it may not be cut along the first half-cut line or the second half-cut line. Further, if the position of the notch is misaligned, the tip of the notch may come into contact with the first half-cut line, and the package may be opened during transportation.

The present invention has been made to solve the above problems. That is, it is an object of the present invention to provide a pouch that is difficult to open during transportation, can be opened when a consumer wants to open it, and has reduced misalignment of the opening start part with respect to the half-cut line.

The present invention includes the following inventions.
[1] A pouch including a front film and a back film facing the front film, the pouch comprising an upper edge, a lower edge, and a first film extending between the upper edge and the lower edge. a body portion having a side edge and a second side edge; and a spout portion integral with the body portion, the spout portion being a corner formed by the top edge and the first side edge. a pouring port unsealed portion provided on the side, wherein the pouring port portion communicates with the main body portion and serves as a flow path when pouring out the contents; and a pouring port sealing the pouring port unsealed portion. the spout sealing portion has a first portion positioned above the spout unsealed portion and a second portion positioned closer to the first side edge than the spout unsealed portion. and an unsealing start portion consisting of a notch or a notch is provided in the first portion of the spout seal portion, and the front film and the back film are provided so as to cross at least the unsealed portion of the spout, A first half-cut line located on the upper side and a second half-cut line located on the lower side are provided, and exist on at least one of the front film and the back film and at least on the unsealed portion of the spout. At least one third half-cut line positioned between the first half-cut line and the second half-cut line is provided such that the first half-cut line, the second half-cut line, and the The third half-cut lines extend so as not to cross each other, and the first half-cut lines extend from the outer edge of the first portion of the spout seal portion to the outer edge of the second portion of the spout seal portion. The first half-cut line extends from the outer edge of the first portion of the spout seal portion, and extends from the first portion curved to be convex upward, and at least the spout seal a second portion extending from an inner edge of the first portion of the spout seal portion to an outer edge of the second portion of the spout seal portion, wherein the second half-cut line extends from the first portion of the spout seal portion; The second half-cut line extends from the outer edge to the outer edge of the second portion of the spout seal portion, and the second half-cut line extends from the outer edge of the first portion of the spout seal portion and projects downward. and a second portion extending at least from the inner edge of the first portion of the spout seal portion to the outer edge of the second portion of the spout seal portion; 3 half-cut lines are parallel to the second portion of the first half-cut line and the second portion of the second half-cut line, and span the outer edge of the second portion of the spout seal, When the tip of the third half-cut line on the side of the unsealing start portion exists within the first portion of the spout seal portion, the third half-cut line is cut from the inner edge of the first portion of the spout seal portion. The distance to the tip of the line passes through the inner edge of the first portion of the spout seal portion and the tip of the opening start portion, and is parallel to the inner edge of the first portion of the spout seal portion. is less than 8/9 of the distance from the imaginary line, and the tip of the opening start portion is positioned between the first portion of the first half-cut line and the first portion of the second half-cut line Yes, pouch.

[2] The pouch according to [1] above, wherein the first portion of the first half-cut line and the first portion of the second half-cut line each have a radius of curvature of 2.0 mm or more and 5.0 mm or less. .

[3] The pouch according to [1] or [2] above, wherein the second portion of the first half-cut line and the second portion of the second half-cut line are straight lines.

According to the present invention, it is possible to provide a pouch that is difficult to be opened during transportation, can be opened when a consumer wants to open it, and has reduced misalignment of the opening start portion with respect to the half-cut line.

1 is a front view of a pouch according to an embodiment; FIG. FIG. 2 is a rear view of the pouch according to the embodiment. 3 is a plan view for explaining the dimensions of each component of the pouch shown in FIG. 1. FIG. FIG. 4 is an enlarged view of the periphery of the spout portion of FIG. 1. FIG. FIG. 5 is a plan view for explaining the dimensions and the like of each component around the spout portion of FIG. 4. FIG. FIG. 6 is an enlarged view of the periphery of another spout portion of the pouch according to the embodiment. FIG. 7 is an enlarged view of the periphery of another spout portion of the pouch according to the embodiment. FIG. 8 is a rear view of another pouch according to the embodiment; FIG. 9 is a cross-sectional view of the packaging material used for the pouch according to the embodiment. FIG. 10(A) and FIG. 10(B) are diagrams schematically showing the manufacturing process of the pouch according to the embodiment. FIG. 11(A) and FIG. 11(B) are diagrams schematically showing the manufacturing process of the pouch according to the embodiment. 12(A) and 12(B) are enlarged views of the periphery of the spout of pouches according to Examples 2 and 3, and FIGS. 12(C) and 12(D) are comparative examples 1 and 2. 2 is an enlarged view of the periphery of the spout portion of the pouch according to FIG. 13(A) to 13(C) are enlarged views of the periphery of the spout portion of the pouches according to Examples 4 to 6, and FIG. 13(D) is the periphery of the spout portion of the pouch according to Comparative Example 3. is an enlarged view of. 14(A) to 14(C) are enlarged views of the periphery of the spout portion of the pouches according to Examples 7 to 9, and FIG. 14(D) is the periphery of the spout portion of the pouch according to Comparative Example 4. is an enlarged view of. 15(A) to 15(C) are enlarged views of the periphery of the spout portion of the pouches according to Examples 10 to 12, and FIG. 15(D) is the periphery of the spout portion of the pouch according to Comparative Example 5. is an enlarged view of. 16(A) to 16(C) are enlarged views of the periphery of the spout portion of pouches according to Examples 13 to 15, and FIG. 16(D) is an enlarged view of the periphery of the spout portion of the pouch according to Comparative Example 6. is an enlarged view of. FIG. 17(A) is an enlarged view of the periphery of the spout portion of the pouch according to Example 16, and FIGS. is an enlarged view of.

Hereinafter, pouches according to embodiments of the present invention will be described with reference to the drawings. As used herein, the terms "film", "sheet" and the like are not to be distinguished from each other based solely on the difference in designation. Therefore, for example, the term "film" is used to include members that are also called sheets. FIG. 1 is a front view of a pouch according to this embodiment, FIG. 2 is a rear view of the pouch according to this embodiment, and FIG. 3 illustrates the dimensions of each component of the pouch shown in FIG. It is a top view for doing. 4 is an enlarged view of the periphery of the spout portion of FIG. 1, and FIG. 5 is a plan view for explaining the dimensions of each component around the spout portion of FIG. 6 and 7 are enlarged views of the periphery of another spout portion of the pouch according to this embodiment, and FIG. 8 is a rear view of another pouch according to the embodiment. FIG. 9 is a cross-sectional view of the packaging material used for the pouch according to this embodiment, and FIGS. 10A, 10B, 11A and 11B are It is a figure which shows typically the manufacturing process of the pouch which concerns.

<<<Pouch>>>
The pouch 10-1 shown in FIG. 1 has a storage space for storing contents. Contents include, but are not limited to, liquids, powders, granules, and the like. Specifically, the contents include shampoo, conditioner, household detergent, alcohol disinfectant, disinfectant, lotion, milky lotion, seasoning, edible oil, engine oil, processed food, and the like. However, the contents are not limited to these. Pouch 10-1 may be a refillable pouch for transferring to a refillable container, but may not be a refillable pouch.

The pouch 10-1 is composed of a front film 11, a back film 12 and a bottom film 13, as shown in FIGS. However, the pouch may consist of at least one sheet of film, and may not consist of a front film, a back film and a bottom film. The pouch 10-1 shown in FIGS. 1 and 2 is in a state in which the folded bottom film 13 is not unfolded and the pouch 10-1 is made substantially flat.

Pouch 10-1 has a top edge 10A, a bottom edge 10B, and first and second side edges 10C and 10D extending between top edge 10A and bottom edge 10B.

The ratio (H1/W1) of the height H1 (see FIG. 3) of the pouch 10-1 to the width W1 (see FIG. 3) of the pouch 10-1 may be 1 or more and 2.5 or less. If H1/W1 is 1 or more, more contents can be accommodated, and if H1/W1 is 2.5 or less, the pouch 10-1 can stably stand on its own before being opened. . The width W1 of the pouch 10-1 is the length of the pouch 10-1 in the first direction DR1 along which the lower edge 10B extends. Specifically, the width W1 of the pouch 10-1 is the length from the first side edge 10C to the second side edge 10D of the pouch 10-1. If the width W1 of the pouch is not constant, the width of the pouch is the shortest value. The height H1 of the pouch 10-1 is the length of the pouch 10-1 in the second direction DR2, which is the direction in which the first side edge 10C extends. Specifically, the height H1 of the pouch 10-1 is the length from the lower edge 10B to the upper edge 10A. If the length of the pouch is not uniform, the height of the pouch shall be the maximum value. The width W1 of the pouch 10-1 may be 100 mm or more and 200 mm or less, and the height H1 of the pouch 10-1 may be 100 mm or more and 300 mm or less. The dimensions of the pouch and the dimensions of each constituent element of the pouch are all values measured with the pouch in a substantially flat state without unrolling the bottom film. Further, the positions of "upper", "lower", "side", and "bottom" in this specification refer to the positions when the bottom film 13 is spread and the pouch 10-1 stands on its own.

The pouch 10-1 includes a body portion 20 having a storage space in which contents are stored, and a spout portion 30 integrated with the body portion 20. As shown in FIG. The pouch 10-1 is also provided with an unsealing start portion 40, a first half-cut line 51, a second half-cut line 52, and a third half-cut line 53. As shown in FIG.

<<Body part>>
The body portion 20 has an upper portion 20A, a bottom portion 20B opposite to the upper portion 20A, and a pair of first and second side portions 20C and 20D extending between the upper portion 20A and the bottom portion 20B. The body portion 20 may have a gusset portion 21 on the bottom portion 20B. By providing the gusset portion 21, the pouch 10-1 can stand on its own. Moreover, since the accommodation space can be enlarged, more contents can be accommodated.

As shown in FIGS. 1 and 2, the body portion 20 has a first side seal portion 22 formed on the first side portion 20C and a second side portion 20D facing the first side portion 20C. A second side seal portion 23, a first fold portion 24 and a second fold portion 25 located below the first side seal portion 22 and the second side seal portion 23, and a first fold portion formed in the upper portion 20A. It has a shoulder seal portion 26 and a second shoulder seal portion 27 formed on the first side portion 20C. Although the upper part of the pouch 10-1 is open in FIG. 1, it is joined after the content is filled into the storage space, and the upper seal part surrounded by the upper edge 10A and the two-dot chain line in FIG. An upper sealing portion is formed in the predetermined area R to seal the pouch 10-1.

<First Side Seal Portion and Second Side Seal Portion>
The first side seal portion 22 is a portion where the front film 11 and the back film 12 are joined to each other in the first side portion 20C, and is formed from the folding line 21A to the second shoulder seal portion 27. there is The second side seal portion 23 is a portion where the front film 11 and the back film 12 are joined to each other in the second side portion 20D, and is formed from the folding line 21A to the upper edge 10A. Bonding of the front film 11 and the back film 12 at the time of forming the first side seal portion 22 and the second side seal portion 23 is performed by heat sealing (heat fusion).

The width W2 of the first side seal portion 22 (see FIG. 3) and the width W2 of the second side seal portion 23 (see FIG. 3) are preferably, for example, 2 mm or more and 15 mm or less. If the width W2 of each of the first side seal portion 22 and the second side seal portion 123 is 2 mm or more, sealing can be reliably performed at the first side seal portion 22 and the second side seal portion 23, Moreover, if it is 15 mm or less, a wider accommodation space can be secured. In this specification, the "width" of each seal means the length in the direction perpendicular to the extending direction of the seal. When the width of the seal portion is not constant, the width of the seal portion is the shortest value among the lengths in the direction orthogonal to the extending direction of the seal portion. The lower limit of width W2 is more preferably 4 mm or more, and the upper limit is more preferably 10 mm or less.

<First fold and second fold>
The first pleat portion 24 and the second pleat portion 25 are portions for forming the gusset portion 21 . The first folds 24 are formed by joining the first portions 13A of the front film 11 and the bottom film 13 to each other, and the second folds 25 are the second folds of the back film 12 and the bottom film 13. It is formed by joining the parts 13B together. Bonding of the first portions 13A of the front film 11 and the bottom film 13 when forming the first folds 24 and second portions 13B of the back film 12 and the bottom film 13 when forming the second folds 25 are joined by heat sealing. The first folds 24 and the second folds 25 may be rectangular, for example.

The first fold 24 has a first bottom sealing portion 24A in which the first portion 13A of the front film 11 and the bottom film 13 are joined, and the second fold 25 has a first portion 13A of the front film. 11 and the second portion 13B of the bottom film 13 are joined together to form a second bottom sealing portion 25B.

A portion of the side portion of the first fold portion 24 and a portion of the side portion of the second fold portion 25 constitute a later-described sealant layer 66 and the back film 12 of the packaging material 60 constituting the front film 11. It is joined by a third bottom seal 28 formed by joining the sealant layer 66 of the packaging material 60 . Bonding of the sealant layers 66 during formation of the third bottom seal portion 28 is performed by heat sealing.

The third bottom sealing portion 28 is a portion for joining a portion of the side portion of the first fold portion 24 and a portion of the side portion of the second fold portion 25 to each other. The third bottom sealing portion 28 is formed by joining the front film 11 and the back film 12 via the notch 13C provided in the bottom film 13 . From the viewpoint of spreading the bottom film when the contents are filled into the storage space, it is necessary that the first and second pleats are separated from each other at the center of the bottom of the pouch. If the two folds are completely separated, the first fold and the second fold cannot bear the weight of the content when the storage space is filled with the content, and the first fold and the second fold are separated. There is a risk that the pouch will become difficult to stand on its own. Further, since the base material layers to be described later cannot be heat-sealed, the first and second pleats where the base material layers face each other cannot be heat-sealed as they are. For this reason, by forming the third bottom seal portion 28, part of both side portions of the first pleat portion 24 and the second pleat portion 25 are joined. As a result, the pouch 10-1 can stably stand on its own without impeding the spread of the bottom film 13 when the contents are filled.

<First Shoulder Seal Portion and Second Shoulder Seal Portion>
The first shoulder seal portion 26 is a portion extending from the upper portion 20A toward the spout portion 30, and the second shoulder seal portion 27 is a portion extending from the first side portion 20C toward the spout portion 30. . The first shoulder seal portion 26 is connected to a first portion 32A of the spout seal portion 32, which will be described later, and extends in a direction different from that of the first portion 32A of the spout seal portion 32. As shown in FIG. The second shoulder seal portion 27 is connected to a second portion 32B of the spout seal portion 32, which will be described later, and extends in a direction different from that of the second portion 32B of the spout seal portion 32. As shown in FIG.

The ratio (H2/H1) of the height H2 (see FIG. 4) of the first fold 24 to the height H1 (see FIG. 3) of the pouch 10-1 may be 0.1 or more and 0.5 or less. . The lower limit of H2/H1 is preferably 0.2 or more, and the upper limit is preferably 0.4 or less. If H2/H1 is 0.2 or more, more contents can be accommodated. Further, when H2/H1 is 0.4 or less, the pouch 10-1 can be more stably self-supported. The ratio of the height of the second folds 25 to the height H1 of the pouch 10-1 is also the same as H2/H1. The height H2 of the first fold 24 and the width of the second fold 25 are the lengths in the second direction DR2 (see FIG. 4). Specifically, it is the length from the folding line 21A to the lower edge 10B of the pouch 10-1.

<<Spout part>>
The spout portion 30 is a portion for pouring out the contents from the pouch 10-1. The spout portion 30 shown in FIG. 1 is provided on the corner portion 10E side formed by the upper edge 10A and the first side edge 10C.

The spout portion 30 is configured to extend along the pouring direction DR3 (see FIG. 5) in which the contents are poured. By providing such a spout portion 30, it is possible to regulate the flow of the contents when being poured out from the pouch 10-1, thereby facilitating the work of pouring out the contents.

As shown in FIG. 4 , the spout portion 30 includes a spout unsealed portion 31 communicating with the body portion 20 and a spout sealed portion 32 that seals the spout unsealed portion 31 . Notches 33 and 34 may be formed on the sides of the spout portion 30 .

<Spout unsealed part>
The spout unsealed portion 31 is a portion that serves as a channel through which the contents pass when the contents are discharged from the pouch 10-1. The spout unsealed portion 31 is defined by an inner edge 32A1 of the first portion 32A of the spout sealed portion 32 and an inner edge 32B1 of the second portion 32B. Since the pouch 10-1 shown in FIG. 1 has not yet been opened, the spout unsealed portion 31 is not connected to the outside. The seal portion 31 is connected to the outside. As a result, the contents can be discharged from the pouch 10-1 through the spout unsealed portion 31. FIG.

<Spout seal part>
The spout seal portion 32 is a portion where a part of the front film 11 and a part of the back film 12 of the spout portion 30 are joined together.

The spout sealed portion 32 has a first portion 32A positioned above the spout unsealed portion 31 and a second portion 32B positioned closer to the first side edge 10C than the spout unsealed portion 31 . The first portion 32A and the second portion 32B are separated by the bisector BS (see FIG. 5) of the spout portion 30. As shown in FIG. That is, the portion of the spout seal portion 32 positioned above the bisector BS is defined as a first portion 32A, and the portion of the spout seal portion 32 positioned closer to the first side edge 10C than the bisector BS. is the second portion 32B.

The bisector BS of the spout portion 30 shall be drawn as follows. First, as shown in FIG. 5, the first half-cut line 51 intersects the inner edge of the spout seal portion 32 at two points, so the midpoint M1 of the line segment connecting one intersection point and the other intersection point is determined. Similarly, the second half-cut line 52 intersects the inner edge of the spout seal portion 32 at two points, so the midpoint M2 of the line segment connecting one intersection point and the other intersection point is determined. A straight line passing through the midpoints M1 and M2 is defined as a bisector BS.

<<Opening part>>
The opening start portion 40 can be a starting point for opening the pouch 10-1, and is provided in the first portion 32A of the spout seal portion 32. As shown in FIG. The opening start part is a notch or a notch. The opening start part 40 is a notch.

<<First half-cut line to third half-cut line>>
First half-cut line 51, second half-cut line 52, and third half-cut line 53 are provided on front film 11 and back film 12, respectively, as shown in FIGS. . The first half-cut line 51 provided on the front film 11 is the second half-cut line 51 provided on the back film 12 so as to overlap with the first half-cut line 51 provided on the back film 12. The line 52 overlaps the second half-cut line 52 provided on the back film 12 , and the third half-cut line 53 provided on the front film 11 overlaps the third half-cut line 52 provided on the back film 12 . It is preferably provided so as to overlap with the half-cut line 53 . A "half-cut line" in this specification is a cutting line that does not penetrate the front film or the back film. The half-cut line is formed so as to melt or penetrate the base material layer, which will be described later, and not penetrate the sealant layer.

The first half-cut line 51, the second half-cut line 52, and the third half-cut line 53 maintain the sealed state of the pouch 10-1. 51 , second half-cut line 52 , and third half-cut line 53 to guide opening.

The first half-cut line 51 and the second half-cut line 52 are provided so as to cross at least the spout unsealed portion 31 . By forming the first half-cut line 51 or the like across the unsealed portion 31 of the spout portion, it is possible to easily cut off a part of the spout portion 30 along the first half-cut line 51 or the like. Pouch 10-1 can be opened. Further, the third half-cut line 53 is provided so as to exist at least in the spout unsealed portion 31 . The third half-cut line 53 is provided so as to cross the unsealed spout portion 31 as shown in FIG. preferably.

The first half-cut line 51 is located on the upper side, the second half-cut line 52 is located on the lower side, and the third half-cut line 53 is the line between the first half-cut line 51 and the second half-cut line 52. located in between. At least one third half-cut line 53 is provided. Although one or more third half-cut lines 53 may be provided, it is preferable that three or more third half-cut lines 53 are provided as shown in FIG. Since three or more third half-cut lines 53 are provided, even if the break line deviates from one third half-cut line 53, the break line can be transferred to another third half-cut line 53. Since the fracture line can be advanced along the third half-cut line 53 by colliding, the fracture can be reliably advanced along the third half-cut line 53. - 特許庁Three third half-cut lines 53 shown in FIG. 4 are provided, but five may be provided.

The first half-cut line 51, the second half-cut line 52, and the third half-cut line 53 extend so as not to cross each other. In the pouch 10-1, the second portion 51B described later of the first half-cut line 51, the second portion 52B described later of the second half-cut line 52, and the third half-cut line 53 are arranged parallel to each other. extended. "Parallel" as used herein includes not only strict parallelism but also cases where the mutual angle is within ±15°.

The first half-cut line 51 and the second half-cut line 52 extend from the outer edge 32A2 of the first portion 32A of the spout seal portion 32 to the outer edge 32B2 of the second portion 32B of the spout seal portion 32, respectively. By forming the first half-cut line 51 and the second half-cut line 52 as described above, the fracture line can be guided to the outer edge 32B2 of the second portion 32B.

The first half-cut line 51 extends from the outer edge 32A2 of the first portion 32A of the spout seal portion 32, and extends from the first portion 51A curved so as to protrude upward and at least the first portion 51A of the spout seal portion 32. A second portion 51B extending from an inner edge 32A1 of the first portion 32A to an outer edge 32B2 of the second portion 32B of the spout seal portion 32 is provided. The first half-cut line 51 shown in FIG. 4 is located between the first portion 51A and the second portion 51B, is continuous with the first portion 51A and the second portion 51B, and is convex downward. It further has a third portion 51C that is curved to be. By providing such a third portion 51C, the break line along the first portion 51A smoothly transitions to the second portion 51B. However, the first half-cut line 51 may not have the third portion 51C. If the first half-cut line does not have a third portion, the first portion and the second portion are continuous. The radius of curvature of the third portion 51C is preferably 0.5 mm or more and 2.0 mm or less.

When the first portion 51A is arc-shaped, the radius of curvature of the first portion 51A is preferably 2.0 mm or more and 5.0 mm or less. If the radius of curvature is 2.0 mm or more, even if the position of the opening start portion 40 relative to the first half-cut line 51 is slightly displaced downward or to the right, the breaking line will be aligned with the first portion 51A. If it is 5.0 mm or less, when the pouch 10-1 is opened from the opening portion 40, even if the breaking direction is shifted upward, the breaking line will proceed along the first portion 51A. and then reach between the second portion 51B and the second portion 52B. The lower limit of the radius of curvature is more preferably 2.5 mm or more, and the upper limit is more preferably 4.5 mm or less.

In the first half-cut line 51 shown in FIG. 3, the second portion 51B is linear. By making the second portion 51B linear, the package can be easily opened in the direction intended by the user.

The second half-cut line 52 extends from the outer edge 32A2 of the first portion 32A of the spout seal portion 32, and is curved downward to form a convex shape. and a second portion 51B extending from the inner edge 32A1 of the first portion 32A to the outer edge 32B2 of the second portion 32B of the spout seal portion 32 . The second half-cut line 52 is located between the first portion 52A and the second portion 52B, is connected to the first portion 52A and the second portion 52B, and is curved to be convex downward. It further comprises a third portion 52C. However, the second half-cut line 52 may not have the third portion 52C. The radius of curvature of the third portion 52C is preferably 2.0 mm or more and 5.0 mm or less.

When the first portion 52A is arcuate, the radius of curvature of the first portion 52A is preferably 2.0 mm or more and 5.0 mm or less. If the curvature radius is 2.0 mm or more, even if the position of the opening start portion 40 with respect to the second half-cut line 52 is slightly displaced upward or leftward, the breaking line will be aligned with the first portion 52A. If the collision is possible, and if it is 5.0 mm or less, when the pouch 10-1 is opened from the opening part 40, even if the breaking direction is shifted downward, the breaking line will be along the first part 52A. It can advance and then reach between the second portion 52B and the second portion 51B. The lower limit of the radius of curvature is more preferably 2.5 mm or more, and the upper limit is more preferably 4.0 mm or less.

In the second half-cut line 52 shown in FIG. 3, the second portion 52B is linear for the same reason as the second portion 51. As shown in FIG.

The third half-cut line 53 extends over the outer edge 32B2 of the second portion 32B of the spout seal portion 32. As shown in FIG. The tip 53A of the third half-cut line 53 on the unsealing start portion 40 side may exist within the first portion 32A of the spout seal portion 32, but in this case, the first portion of the spout seal portion 32 The distance D1 from the inner edge 32A1 of 32A to the tip 53A of the third half-cut line 53 passes through the inner edge 32A1 of the first portion 32A of the spout seal portion 32 and the tip 40A of the unsealing start portion 40, and is the spout seal portion. It should be less than 8/9 of the distance D2 between the inner edge 32A1 of the first portion 32A of 32 and the parallel imaginary line IL1. If the distance D1 is less than 8/9 of the distance D2, the distance between the tip 40A of the opening start portion 40 and the tip 53A of the third half-cut line 53 is long, and the distance between the tip 40A and the tip 53A is Since the first portion 32A of the spout seal portion 32 is present, the pouch 10-1 is less likely to be opened during transportation.

The interval between the first half-cut line 51 and the third half-cut line 53, the interval between the second half-cut line 52 and the third half-cut line 53, and the interval between the third half-cut lines 53 are each 0.5 mm or more. 0 mm or less. If these intervals are within the above range, even if the break line deviates from the third half-cut line 53, it is caused to collide with the first half-cut line 51 or the second half-cut line 52, and the first half-cut is made. The break line can be advanced along the line 51 or the second half-cut line 53, and conversely, even if the break line deviates from the first half-cut line 51 or the second half-cut line 52, the third By colliding with the half-cut line 53, the break line can be advanced along the third half-cut line 53, and even if the break line deviates from the third half-cut line 53, the other third half-cut line 53 can be cut. The break line can be advanced along the third half-cut line 53 by colliding with the cut line. More preferably, the lower limit of these intervals is 0.75 mm or more, and the upper limit is 1.5 mm or less.

The line widths of the first half-cut lines 51, the second half-cut lines 52, and the third half-cut lines 53 are preferably 50 μm or more and 200 μm or less. If these line widths are 50 μm or more, they are likely to break along the first half-cut line 51 or the like, and if they are 200 μm or less, the sealant layer 66 is destroyed (thermally melted) and the unsealing start portion 40 is broken. To prevent the strength from being damaged more than necessary, and to keep the design of the opening start part 40 from being damaged. The lower limit of these line widths is more preferably 70 μm or more, and the upper limit is more preferably 160 μm or less.

The second portion 51B of the first half-cut line 51, the second portion 52B of the second half-cut line 52, and the third half-cut line 53 shown in FIG. good too. Specifically, as shown in FIG. 6, the second portions 51B and 52B and the third half-cut line 53 may be curved so as to protrude downward. By curving the second portions 51B and 52B and the third half-cut line 53 in this way, even if an external stress is applied to the opening start portion 40 and the pouch 10-1 is broken, the stress will be reduced. In addition, it is possible to prevent the pouch 10-1 from breaking due to the linear transmission of the force, and also prevent an unexpected user from accidentally opening the pouch 10-1.

When the second portions 51B and 52B and the third half-cut line 53 are convex downward, the radius of curvature of the second portions 51B and 52B and the third half-cut line 53 should be 15 mm or more and 30 mm or less. is preferred. If the radius of curvature is 15 mm or more, the user can break the second portions 51B and 52B or along the third half-cut line 53 with a natural movement. Even if 1 is difficult to cut, it can be broken along the second portions 51B and 52B and the third half-cut line 53. FIG. The lower limit of this radius of curvature is more preferably 17 mm or more, and the upper limit is more preferably 40 mm or less.

1 reaches the inner edge 32A1 of the first portion 32A of the spout seal portion 32 as shown in FIG. No need. As shown in FIG. 7, when the tip 53A of the third half-cut line 53 on the opening start portion 40 side does not reach the inner edge 32A1 of the first portion 32A of the spout seal portion 32, the third half-cut line 53 is cut. When the imaginary line IL2 extending toward the unsealing start portion 40 side is drawn, the tip 53A of the third half-cut line 53 on the unsealing start portion 40 side, the imaginary line IL2 and the inner edge 32A1 of the first portion 32A of the spout seal portion 32. A distance D3 along the imaginary line IL2 connecting the intersection point IP1 between the third half-cut line 53 and the intersection point IP2 between the third half-cut line 53 and the inner edge 32B1 of the second portion 32B of the spout seal portion 32 from the intersection point IP1. It is preferably less than 1/5 of the distance D4 along the cut line 53.

Although the third half-cut lines 53 shown in FIGS. 1 and 2 are provided on both the front film 11 and the back film 12, the third half-cut lines 53 are provided on the front film 11 and At least one of the back films 12 needs to be provided, and it is not necessary to be provided on both the front film 11 and the back film 12 . Specifically, the third half-cut line 53 may not be provided on the back film 12 like the pouch 10-2 shown in FIG. According to the pouch 10-2, unintended breakage can be suppressed. In this case, the front film 11 is provided with the third half-cut line 53 as in FIG. The third half-cut line may be provided on the back film without providing the third half-cut line on the front film. The pouch 10-2 is the same as the pouch 10-1 except that the third half-cut line 53 is not provided on the back film 12. FIG.

The first half-cut line 51, the second half-cut line 52, and the third half-cut line 53 can be formed by laser processing. By forming the first half-cut lines 51 and the like by laser processing, the first half-cut lines 51 and the like can be easily formed. Also, by selecting a laser beam, the first half-cut line 51 and the like can be formed only on a desired layer. Lasers for forming the first half-cut lines 51 and the like are not particularly limited, but excimer lasers, carbon dioxide lasers, YAG lasers, semiconductor lasers, helium-neon lasers, argon ion lasers, and the like can be used.

<<Packaging materials>>
Pouch 10-1 is constructed from packaging material 60. As shown in FIG. That is, the front film 11, the back film 12 and the bottom film 13 are composed of the packaging material 60 shown in FIG. The packaging material comprises a base layer and a sealant layer. The packaging material 60 shown in FIG. 9 includes at least a first base layer 61, a printed layer 62, a first bonding layer 63, a second base layer 64, a second bonding layer 65 and a sealant layer 66 in this order. there is At least one of the first base material layer 61 and the second base material layer 64 may be provided as the base material layer. The packaging material 60 may also include a barrier layer between the first substrate layer and the sealant layer. When the packaging material 60 includes a barrier layer, the packaging material 60 includes, for example, a first base layer 61, a printing layer 62, a first bonding layer 63, a barrier layer, a second base layer 64, and a second bonding layer. 65 and at least a sealant layer 66 in that order.

<First Base Layer and Second Base Layer>
The first base layer 61 and the second base layer 64 are, for example, stretched base layers that are stretched in a predetermined direction. The first base material layer 61 and the second base material layer 64 function as base material layers for giving the packaging material 60 a predetermined strength. The first substrate layer 61 and the second substrate layer 64 may be stretched plastic films. The term "stretched plastic film" as used herein means a plastic film that has been intentionally stretched in order to improve the mechanical strength of the plastic film. A stretched plastic film is a plastic film that has been stretched in one or two predetermined directions. The stretching direction of the stretched plastic film is not particularly limited. The draw ratio of each stretched plastic film is, for example, 1.05 times or more.

Both the first base material layer 61 and the second base material layer 64 may be biaxially stretched polyester films containing polyester as a main component. Also, the first base layer 61 may be a biaxially stretched polyester film and the second base layer 64 may be a biaxially stretched polyamide film, or the first base layer 61 may be a biaxially stretched polyamide film. and the second substrate layer 64 may be a biaxially oriented polyester film.

As used herein, "comprising polyester as a main component" means that the biaxially stretched polyester film contains more than 50% by mass of polyester. Examples of polyester include polyethylene terephthalate (hereinafter also referred to as PET) and polybutylene terephthalate (hereinafter also referred to as PBT). In addition, the polyester in the stretched plastic film exceeding 50% by mass may be composed of one type of polyester, or may be composed of two or more types of polyester.

In the present specification, "containing polyamide as a main component" means that the biaxially stretched polyamide film contains more than 50% by mass of polyamide. Examples of polyamides may include aliphatic polyamides or aromatic polyamides. Aliphatic polyamides include nylons such as nylon-6, nylon-6,6, and copolymers of nylon 6 and nylon 6,6, and aromatic polyamides include poly-meta-xylene adipamide ( MXD6) and the like. When the oriented plastic film contains polyamide as a main component, the puncture strength of the pouch 10-1 can be enhanced.

The thickness of the first base material layer 61 is preferably 6 μm or more and 16 μm or less. By setting the thickness of the first base material layer 61 to 6 μm or more, the self-standing of the pouch 10-1 can be improved, and the first base material layer 61 has sufficient strength. Further, by setting the thickness of the first base material layer 61 to 16 μm or less, the first base material layer 61 exhibits excellent moldability. More preferably, the upper limit of the thickness of the first base material layer is 15 μm or less. Since the thickness of the second base material layer 64 is the same as the thickness of the first base material layer 61, description thereof will be omitted here. The thickness of the first base material layer 61 and the second base material layer 64 is obtained by randomly measuring ten thicknesses from a cross-sectional photograph of the base material layer taken using an optical microscope, and calculating the arithmetic mean value of the measured thicknesses. shall be requested. In addition, in the pouch, the first base material layer 61 is arranged so as to be the outermost layer.

<Print layer>
The printed layer 62 is a layer containing a coloring material and a binder resin. By forming the printed layer 62, a pattern can be formed on the pouch 10-1. The term "picture" as used herein is not particularly limited, and broadly includes, for example, drawings, characters, designs, patterns, symbols, designs, marks, and the like.

The print layer 62 may contain other optional additives. Additives include, for example, lubricants, antiblocking agents, fillers, curing agents, pigment dispersants, antifoaming agents, leveling agents, waxes, silane coupling agents, preservatives, antioxidants, ultraviolet absorbers, antirust agents, agents, plasticizers, flame retardants, color developers, and the like. These additives are used particularly for the purpose of improving printing suitability, printing effect, etc., and the type and amount used can be appropriately selected according to the printing method, printing substrate, and printing conditions. The printed layer 62 can be formed on the first base material layer 61 by a printing method such as gravure printing.

(colorant)
The coloring material is not particularly limited, and known pigments and dyes can be used, and are appropriately selected according to the desired color.

(binder resin)
Examples of binder resins include linseed oil, tung oil, soybean oil, hydrocarbon oils, rosin, rosin esters, rosin-modified resins, shellac, alkyd resins, phenolic resins, maleic acid resins, natural resins, hydrocarbon resins, Polyvinyl chloride resin, polyacetic acid resin, polystyrene resin, polyvinyl butyral resin, (meth) acrylic resin, polyamide resin, polyester resin, polyurethane resin, epoxy resin, urea resin, melamine resin, aminoalkyd base resins, nitrocellulose, ethyl cellulose, chlorinated rubber, cyclized rubber, polymers of (meth)acrylate compounds, or mixtures thereof.

<First Joining Layer and Second Joining Layer>
As the first bonding layer 63 and the second bonding layer 65, for example, an adhesive generally used in a known dry lamination method can be used. adhesives, cyanoacrylate adhesives, ethylene copolymer adhesives, cellulose adhesives, polyester adhesives, polyamide adhesives, amino resin adhesives, epoxy adhesives, polyurethane adhesives, etc. can. A polyurethane adhesive is a cured product of a polyol compound and an isocyanate compound.

<Sealant layer>
The sealant layer 66 is provided in order to seal the housing space of the pouch 10-1 by heat-sealing two sheets of packaging material on top of each other. Therefore, in the pouch 10-1, the sealant layer 96 is arranged closest to the storage space.

The sealant layer 96 may be any material that can be melted by heat to fuse the opposing packaging materials 60 to each other. As a material forming the sealant layer 66, for example, polyethylene (PE) can be used. Here, polyethylene includes not only homopolymers of ethylene but also copolymers generally recognized as polyethylene, such as copolymers of ethylene and α-olefin monomers. Low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), and the like can be suitably used as the polyethylene used in the sealant layer. A plurality of sealant layers may be provided.

The thickness of the sealant layer 66 can be 10 μm or more and 200 μm or less. If the thickness of the sealant layer 66 is 10 μm or more, the pouch 10-1 has excellent impact resistance against dropping that may occur during the distribution process. . The lower limit of the thickness of the sealant layer 66 is more preferably 30 μm or more or 70 μm or more from the viewpoint of further improving the self-standing of the pouch 10-1. 150 μm or less is more preferable from the viewpoint of being able to The thickness of the sealant layer 66 can be measured by the same method as the thickness of the first base material layer 61 .

<Barrier layer>
The barrier layer is a layer for enhancing gas and liquid barrier properties. Although the specific structure of the barrier layer is not particularly limited, for example, a deposited layer containing an inorganic substance such as aluminum formed by deposition, an inorganic oxide such as aluminum oxide or silicon oxide, a metal foil layer such as aluminum, An ethylene-vinyl alcohol copolymer layer formed by coating, specifically EVAL (EVOH), etc., can be mentioned.

Specific examples of the packaging material 60 include the following packaging materials. It should be noted that "/" is used as a notation indicating the boundary between layers when listing the layers. The layers shall be written from the outside to the inside of the pouch. That is, the rightmost layer is the sealant layer.
Stretched PET film/printed layer/bonding layer/stretched nylon film/bonding layer/PE layer Stretched PET/barrier layer/printing layer/bonding layer/stretched nylon/bonding layer/PE
Stretched PET/printing layer/bonding layer/barrier layer/stretched nylon/bonding layer/PE
Stretched nylon/printing layer/bonding layer/barrier layer/stretched PET/bonding layer/PE
Stretched nylon/barrier layer/printing layer/bonding layer/stretched PET/bonding layer/PE
Stretched nylon/printing layer/bonding layer/barrier layer/stretched PET/bonding layer/PE
Oriented nylon/Printing layer/Bonding layer/Oriented nylon/Bonding layer/PE
Oriented nylon/printing layer/bonding layer/PE
Oriented nylon/barrier layer/printing layer/bonding layer/PE
Oriented nylon/printing layer/bonding layer/barrier layer/PE
Stretched PET/printing layer/bonding layer/stretched nylon/bonding layer/barrier layer (aluminum foil)/bonding layer/PE

When the pouch 10-1 is opened from the opening start portion 40, the first portion 32A of the spout seal portion 32 is broken. Here, since the first half-cut line 51 and the second half-cut line 52 are present on both sides of the opening start portion 40, even if the breaking line proceeds in the lower left direction, the first half-cut line 51 , and then proceeds along the first half-cut line 51, and even if the break line proceeds in the lower right direction, it collides with the second half-cut line 52, and after that, the second half-cut line Proceed along cut line 52 . Furthermore, when the break line does not collide with the first half-cut line 51 or the second half-cut line 52, it collides with the third half-cut line 53, so it proceeds along the third half-cut line 53. Therefore, the spout portion 30 can be partly cut off along any one of the first half-cut line 51, the second half-cut line 52, and the third half-cut line 53. 10-1 can be opened.

When the pouch 10-1 is a refillable pouch, the contents are transferred from the pouch 10-1 to a container such as a bottle. At this time, the pouch 10-1 is first opened as described above. Then, the spout portion is inserted into the container so that the notches 10H and 10I are in contact with the tip of the mouth portion of the container, the contents are discharged from the pouch 10-1, and the contents are transferred to the container.

<<<Manufacturing method of pouch>>>
Such a pouch 10-1 can be manufactured as follows. First, as shown in FIG. 10A, the front film 11 and the back film 12 are opposed to each other, and the folded bottom film 13 is inserted between the front film 11 and the back film 12. do. At this time, the front film 11, the back film 12 and the bottom film 13 are arranged so that the sealant layers 66 are in contact with each other.

Next, the edges of each film are heat-sealed except for the upper portion that serves as a filling port for the contents, and as shown in FIG. 23, forming a first bottom seal portion 24A, a second bottom seal portion 25A, a first shoulder seal portion 26, a second shoulder seal portion 27, a third bottom seal portion 28, and a spout seal portion 32; Thereby, the bag-shaped intermediate body 70 is obtained.

Thereafter, in this intermediate 70, as shown in FIG. 11A, connecting half-cut lines 54 and third half-cut lines 53 are formed in the regions of the front film 11 and the back film 12 to be the spout portions 30. to form The connecting half-cut line 54 is composed of an arc portion 54A, a second portion 54B, a third portion 54C, a fourth portion 54D and a fifth portion 54E. The arc portion 54A is connected to the third portion 54C and the fifth portion 54E. Since the radius of curvature of the arc portion 54 is the same as the radius of curvature of the first portion 51A, description thereof will be omitted here.

The second portion 54B is connected to the third portion 54C, and the fourth portion 54D is connected to the fifth portion 54E. The second portion 54B is similar to the second portion 51B, the third portion 54C is similar to the third portion 51C, the fourth portion 54D is similar to the second portion 52B, and the fifth portion 54E is similar to the third portion. 52C, the description is omitted here.

Finally, as shown in FIG. 11(B), the pouch 10-1 to be produced is punched out along its outline. Here, since part of the circular arc portion 54A is also punched out, the first portion 51A and the second portion 52A are formed, and the first half-cut line 51 and the second half-cut line 52 are formed. As a result, the pouch 10-1 having the main body portion 20 and the spout portion 30 with the upper portion 20A open can be obtained. The pouch 10-2 is obtained in the same manner as the pouch 10-1 except that the back film 12 does not have the third half-cut line 53 formed thereon.

When storing the contents, the pouch 10-1 is filled with the contents through the opening of the upper part 20A, and then the upper part 20A is heat-sealed along the upper sealing area R shown in FIG. As a result, the pouch 10-1 in which the contents are sealed can be obtained.

According to the present embodiment, even if the tip 53A of the third half-cut line 53 on the unsealing start portion 40 side exists within the first portion 32A of the spout seal portion 32, the spout seal portion 32 is The distance D1 from the inner edge 32A1 of the first portion 32A to the tip 53A of the third half-cut line 53 is less than 8/9 of the distance D2. That is, between the tip 53A of the third half-cut line 53 and the unsealing start portion 40, there is a spout seal portion 32 having a predetermined width. As a result, even if the unsealing start portion 40 is slightly broken during transportation, the breaking does not progress because the leading end 53A of the third half-cut line 53 is away. This makes it difficult for the pouches 10-1 and 10-2 to be opened during transportation.

If the half-cut line is not provided in the unsealed portion of the spout, it is difficult for the consumer to open the package even when he or she wants to. In contrast, according to the present embodiment, the first half-cut line 51 and the second half-cut line 52 extend from the outer edge 32A2 of the first portion 32A of the spout seal portion 32 to the second portion 32B of the spout seal portion 32. , and the third half-cut line 53 crosses the spout unsealed portion 31 and spans the outer edge 32B2 of the second portion 32B of the spout seal portion 32, so that the spout unsealed The portion 31 is provided with a first half-cut line 51 and the like. In addition, the first half-cut line 51 and the second half-cut line 52 each extend from the outer edge 32A2 of the first portion 32A of the spout seal portion 32 to the outer edge 32B2 of the second portion 32B of the spout seal portion 32, Moreover, since the opening start portion 40 is located between the first portion 51A of the first half-cut line 51 and the first portion 52A of the second half-cut line 52, when the consumer opens the package from the opening start portion 40. It is possible to prevent the breaking line from advancing in an undesired direction and failing to open the package. Thereby, the package can be opened when the consumer wants to open it.

According to this embodiment, since the unsealing start portion 40 is formed in a state where the arc portion 54A is formed, even if the position of the unsealing start portion 40 with respect to the arc portion 54A is slightly deviated, the arc portion 54A If the tip 40A of the unsealing start portion 40 exists inside, the first half has a first portion 51A that extends from the outer edge 32A2 of the first portion 32A of the spout seal portion 32 and is curved upwardly. Forming the cut line 51 and the second half-cut line 52 extending from the outer edge 32A2 of the first portion 32A of the spout seal portion 32 and having the first portion 52A curved so as to be convex downward. In addition, the tip 40A of the opening start portion 40 can be positioned between the first portion 51A of the first half-cut line 51 and the first portion 52A of the second half-cut line 52. As a result, the pouches 10-1 and 10-2 in which misalignment of the opening start portion 40 with respect to the first half-cut line 51, the second half-cut line 52, and the third half-cut line 53 is reduced can be obtained.

EXAMPLES In order to describe the present invention in detail, examples are given below, but the present invention is not limited to these descriptions. 12(A) and 12(B) are enlarged views of the periphery of the spout of pouches according to Examples 2 and 3, and FIGS. 12(C) and 12(D) are comparative examples 1 and 2. 2 is an enlarged view of the periphery of the spout portion of the pouch according to FIG. 13(A) to 13(C) are enlarged views of the periphery of the spout portion of the pouches according to Examples 4 to 6, and FIG. 13(D) is the periphery of the spout portion of the pouch according to Comparative Example 3. is an enlarged view of. 14(A) to 14(C) are enlarged views of the periphery of the spout portion of the pouches according to Examples 7 to 9, and FIG. 14(D) is the periphery of the spout portion of the pouch according to Comparative Example 4. is an enlarged view of. 15(A) to 15(C) are enlarged views of the periphery of the spout portion of the pouches according to Examples 10 to 12, and FIG. 15(D) is the periphery of the spout portion of the pouch according to Comparative Example 5. is an enlarged view of. 16(A) to 16(C) are enlarged views of the periphery of the spout portion of pouches according to Examples 13 to 15, and FIG. 16(D) is an enlarged view of the periphery of the spout portion of the pouch according to Comparative Example 6. is an enlarged view of. FIG. 17(A) is an enlarged view of the periphery of the spout portion of the pouch according to Example 16, and FIGS. is an enlarged view of.

<Example 1>
In Example 1, a pouch having a spout shown in FIG. 1 was produced. Specifically, a front film, a back film, and a bottom film were prepared. All these films consisted of packaging material. The packaging material comprises a first substrate layer made of a 12 μm thick stretched polyethylene terephthalate film, a 3 μm thick first joining layer made of a urethane-based adhesive, a 15 μm thick stretched nylon film made of a second substrate layer, A second bonding layer made of urethane-based adhesive and having a thickness of 3 μm and a sealant layer made of a polyethylene layer having a thickness of 100 μm were laminated in this order.

After preparing these films, first, the front film and the back film were opposed to each other, and the half-folded bottom film was inserted between the front film and the back film. At this time, the front film, the back film and the bottom film were arranged so that the sealant layers were in contact with each other.

The edges of each film are then heat-sealed to form a first side seal, a second side seal, a first bottom seal, and a second bottom seal, except for the upper portion serving as a filling port for the contents. , a third bottom sealing portion, a first shoulder sealing portion, a second shoulder sealing portion, and a spout sealing portion were formed, thereby obtaining an intermediate body having a housing space and a spout unsealed portion.

After that, a connecting half-cut line and three lines in the shape shown in FIG. to form a third half-cut line. The radius of curvature of the arc portion of the connecting half-cut line was 3.0 mm.

The intermediate was then punched out along the contour of the pouch to be made. Here, the circular arc portion of the connecting half-cut line was cut by punching the intermediate body to form the first half-cut line and the second half-cut line. As a result, a pouch having a spout shown in FIG. 3 with an opening at the top was obtained.

In the pouch according to Example 1, the first half-cut line, the second half-cut line, and the third half-cut line each have a line width of 110 μm, penetrate from the first base material layer to the second bonding layer, and It did not penetrate the sealant layer.

The first half-cut line extends from the outer edge of the first portion of the spout seal portion and is curved to be convex upward, and the spout from the inner edge of the first portion of the spout seal portion. A second portion extending to the outer edge of the second portion of the seal portion, and positioned between the first portion and the second portion, connected to the first portion and the second portion, and projecting downward. and a curved third portion. The first portion of the first half-cut line was arcuate, and the radius of curvature of the first portion was 3.0 mm. A second portion of the first half-cut line was straight.

The second half-cut line extends from the outer edge of the first portion of the spout seal portion and pours out from the first portion curved to be convex downward and the inner edge of the first portion of the spout seal portion. A second portion extending to the outer edge of the second portion of the outlet seal portion, and positioned between the first portion and the second portion, connected to the first portion and the second portion, and projecting upward. and a curved third portion. The first portion of the second half-cut line was arcuate, and the radius of curvature of the first portion was 3.0 mm. A second portion of the second half-cut line was straight.

The third half-cut line extends from the inner edge of the first portion of the spout seal portion to the outer edge of the second portion of the spout seal portion. was present in the first part of Specifically, the distance D1 from the inner edge of the first portion of the spout seal portion to the tip of the third half-cut line was 1.44 mm. In addition, the distance D2 between the inner edge of the first portion of the spout seal portion and an imaginary line passing through the tip of the notch and parallel to the inner edge of the first portion of the spout seal portion was 3.72 mm. . The dimensions of D1 and D2 are as shown in FIG.

The distances between the second portion of the first half-cut line and the third half-cut line, between the third half-cut lines, and between the second portion of the second half-cut line and the third half-cut line are respectively 1.5. was 0 mm.

The pouch thus produced had a height H1 of 220 mm, a height H2 of 35 mm, a width W1 of 135 mm, and a width W2 of 6 mm. The dimensions of H1, H2, W1 and W2 are as shown in FIG.

<Example 2>
In Example 2, the pouch was manufactured in the same manner as the pouch according to Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were shifted upward by 1 mm. was obtained (see FIG. 12(A)).

<Example 3>
In Example 3, the pouch was manufactured in the same manner as the pouch according to Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were shifted upward by 2 mm. was obtained (see FIG. 12(B)).

<Example 4>
In Example 4, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were shifted downward by 1.0 mm. , to obtain a pouch (see FIG. 13(A)).

<Example 5>
In Example 5, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were shifted downward by 2.0 mm. , to obtain a pouch (see FIG. 13(B)).

<Example 6>
In Example 6, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were shifted downward by 2.5 mm. , to obtain a pouch (see FIG. 13(C)). In the pouch according to Example 7, the tip of the third half-cut line on the notch side did not reach the inner edge of the first portion of the spout seal portion. When a virtual line extending the third half-cut line to the notch side is drawn, the point of intersection between the tip of the third half-cut line on the notch side and the inner edge of the first portion of the spout seal portion is The distance D3 along the imaginary line that connects The distance D4 was 18.13 mm. The dimensions of D3 and D4 are as shown in FIG.

<Example 7>
In Example 7, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted leftward by 1.0 mm. , to obtain a pouch (see FIG. 14(A)).

<Example 8>
In Example 8, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted leftward by 2.0 mm. , to obtain a pouch (see FIG. 14(B)).

<Example 9>
In Example 9, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted leftward by 2.5 mm. , to obtain a pouch (see FIG. 14(C)).

<Example 10>
In Example 10, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted to the right by 1.0 mm. , to obtain a pouch (see FIG. 15(A)).

<Example 11>
In Example 11, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted to the right by 2.0 mm. , to obtain a pouch (see FIG. 15(B)).

<Example 12>
In Example 12, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted to the right by 2.5 mm. , to obtain a pouch (see FIG. 15(C)).

<Example 13>
In Example 13, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted in the lower left direction by 1.0 mm. , to obtain a pouch (see FIG. 16(A)).

<Example 14>
In Example 14, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted in the lower left direction by 2.0 mm. , to obtain a pouch (see FIG. 16(B)). In the pouch according to Example 14, the tip of the third half-cut line on the notch side did not reach the inner edge of the first portion of the spout seal portion.

<Example 15>
In Example 15, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted in the lower left direction by 2.5 mm. , to obtain a pouch (see FIG. 16(C)). In the pouch according to Example 15, the tip of the third half-cut line on the notch side did not reach the inner edge of the first portion of the spout seal portion.

<Example 16>
In Example 16, the same pouch as in Example 1 was used, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted in the lower right direction by 1.0 mm. to obtain a pouch (see FIG. 17(A)).

<Comparative Example 1>
In Comparative Example 1, the pouch according to Example 1 was produced in the same manner as in Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were shifted upward by 2.5 mm. , to obtain a pouch (see FIG. 12(C)).

<Comparative Example 2>
In Comparative Example 2, a pouch was produced in the same manner as the pouch according to Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were shifted upward by 3 mm. was obtained (see FIG. 12(D)). In the pouch according to Comparative Example 2, the first part of the second half-cut line was in contact with the tip of the notch, so the tip of the notch was positioned between the first half-cut line and the second half-cut line. was not

<Comparative Example 3>
In Comparative Example 3, a pouch was produced in the same manner as the pouch according to Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted downward by 3 mm. was obtained (see FIG. 13(D)). In the pouch according to Comparative Example 3, the tip of the notch was in contact with the arc portion of the connecting half-cut line, so the tip of the notch was not positioned between the first half-cut line and the second half-cut line. Ta.

<Comparative Example 4>
In Comparative Example 4, a pouch was produced in the same manner as the pouch according to Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted leftward by 3 mm. was obtained (see FIG. 14(D)). In the pouch according to Comparative Example 4, the tip of the notch was in contact with the arc portion of the connecting half-cut line, so the tip of the notch was not positioned between the first half-cut line and the second half-cut line. Ta.

<Comparative Example 5>
In Comparative Example 5, a pouch was produced in the same manner as the pouch according to Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted to the right by 3 mm. was obtained (see FIG. 15(D)). In the pouch according to Comparative Example 5, the first part of the first half-cut line was in contact with the tip of the notch, so the tip of the notch was positioned between the first half-cut line and the second half-cut line. was not

<Comparative Example 6>
In Comparative Example 6, a pouch was produced in the same manner as the pouch according to Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted in the lower left direction by 3 mm. was obtained (see FIG. 16(D)). In the pouch according to Comparative Example 6, the tip of the notch was in contact with the arc portion of the connecting half-cut line, so the tip of the notch was not positioned between the first half-cut line and the second half-cut line. Ta. Also, the tip of the third half-cut line on the notch side did not reach the inner edge of the first portion of the spout seal portion.

<Comparative Example 7>
In Comparative Example 7, the same pouch as in Example 1 was used, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted in the lower right direction by 2.0 mm. to obtain a pouch (see FIG. 17(B)).

<Comparative Example 8>
In Comparative Example 8, the same pouch as in Example 1 was used, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were each shifted in the lower right direction by 2.5 mm. to obtain a pouch (see FIG. 17(C)). In the pouch according to Comparative Example 8, the tip of the third half-cut line on the notch side was in contact with the tip of the notch.

<Comparative Example 9>
In Comparative Example 9, in the same manner as in the pouch according to Example 1, except that the positions of the first half-cut line, the second half-cut line, and the third half-cut line were shifted in the lower right direction by 3 mm, A pouch was obtained (see FIG. 17(D)). In the pouch according to Comparative Example 9, the tip of the third half-cut line on the notch side was in contact with the tip of the notch.

<Bag breaking evaluation>
The pouches according to Examples and Comparative Examples were evaluated for bag breakage. First, 10 pouches each according to Examples and Comparative Examples were prepared. Then, each pouch was filled with 350 cc of water, and 10 bags each were packed in a cardboard box having a width of 35 cm, a depth of 25 cm, and a height of 20 cm. The corrugated cardboard was dropped from a height of 80 cm upside down 10 times, and the presence or absence of breakage of the bag from the opening portion was confirmed. The evaluation results were as follows.
◯: All 10 bags were not broken.
Δ: 1 to 2 out of 10 bags were broken.
x: 3 to 9 out of 10 bags were broken, or all 10 bags were broken. When the drop height was changed to 50 cm, the same test was conducted.

<Opening evaluation>
When the pouches according to Examples and Comparative Examples were opened, it was evaluated whether or not the opening was successful. First, 10 pouches each according to Examples and Comparative Examples were prepared. Then, the pouches were opened from the notch, which is the opening start portion. The evaluation results were as follows. Note that "successfully opened" means that the package could be opened along the half-cut line, and "failed to open" means that the package could not be opened along the half-cut line.
◯: 8 to 10 out of 10 bags were successfully opened.
Δ: 3 to 7 out of 10 bags were successfully opened.
x: 1 to 2 out of 10 bags were successfully opened, or all 10 bags were unsuccessful.

The evaluation results are shown in Table 1 below. In addition, "-" in column D1 of the table means that the tip of the notch side of the third half-cut line does not reach the inner edge of the first portion of the spout seal portion, and column D3 of the table. "-" means that the tip of the notch side of the third half-cut line reaches the inner edge of the first portion of the spout seal portion. 8/9 of the distance D2 was 3.30 mm, and 1/5 of the distance D4 was 3.63 mm.

As shown in Table 1, in the pouches according to Comparative Examples 2 to 6, 8, and 9, any one of the first half-cut line, the second half-cut line, and the third half-cut line was in contact with the tip of the notch. Therefore, many bags were broken in the bag breaking evaluation. In Comparative Examples 1 and 7, none of the first half-cut line, the second half-cut line, and the third half-cut line were in contact with the tip of the notch, but D1 exceeded 8/9 of D2. Therefore, some bags were broken in the bag breaking evaluation. In contrast, in Examples 1 to 18, none of the first half-cut line, the second half-cut line, and the third half-cut line were in contact with the tip of the notch, and the tip of the third half-cut line When D1 reached the inner edge of the first portion of the spout seal portion, D1 was less than 8/9 of D2, so the bag was not broken in the bag breakage evaluation and was excellent in openability.

10-1, 10-2... Pouch 11... Front film 12... Back film 13... Bottom film 20... Main body part 30... Spout part 31... Spout unsealed part 32... Spout sealed part 32A... First Part 32A1... Inner edge 32A2... Outer edge 32B... Second part 32B2... Outer edge 40... Opening start part 40A... Tip 51... First half-cut line 51A... First part 51B... Second part 52... Second half-cut line 52A... Third part First portion 52B Second portion 53 Third half-cut line 60 Packaging material 61 First substrate layer 64 Second substrate layer 66 Sealant layer

Claims (3)

A pouch comprising a front film and a back film facing the front film,
having a top edge, a bottom edge, first and second side edges extending between the top edge and the bottom edge;
comprising a body portion and a spout portion integrated with the body portion,
The spout portion is provided on a corner side formed by the upper edge and the first side edge,
The spout portion includes a spout unsealed portion that communicates with the body portion and serves as a flow path when the contents are poured out, and a spout sealed portion that seals the spout unsealed portion. ,
The spout sealed portion has a first portion positioned above the spout unsealed portion and a second portion positioned closer to the first side edge than the spout unsealed portion,
The first portion of the spout sealing portion is provided with an unsealing start portion consisting of a notch or a notch,
A first half-cut line located above and a second half-cut line located below are provided on the front film and the back film so as to cross at least the spout unsealed portion,
At least one line located between the first half-cut line and the second half-cut line so as to exist at least in the unsealed portion of the spout on at least one of the front film and the back film is provided with a third half-cut line of
the first half-cut line, the second half-cut line, and the third half-cut line extend so as not to cross each other;
The first half-cut line extends from the outer edge of the first portion of the spout seal portion to the outer edge of the second portion of the spout seal portion,
The first half-cut line extends from the outer edge of the first portion of the spout seal portion and is curved to be convex upward, and at least the first portion of the spout seal portion. a second portion extending from an inner edge of one portion to the outer edge of the second portion of the spout seal;
The second half-cut line extends from the outer edge of the first portion of the spout seal portion to the outer edge of the second portion of the spout seal portion,
The second half-cut line extends from the outer edge of the first portion of the spout seal portion and extends from the first portion curved to be convex downward, and at least the spout seal portion of the spout seal portion. a second portion extending from the inner edge of the first portion to the outer edge of the second portion of the spout seal;
The third half-cut line is parallel to the second portion of the first half-cut line and the second portion of the second half-cut line, and spans the outer edge of the second portion of the spout seal portion. cage,
When the tip of the third half-cut line on the side of the unsealing start portion exists within the first portion of the spout seal portion, the third half-cut line is cut from the inner edge of the first portion of the spout seal portion. The distance to the tip of the line passes through the inner edge of the first portion of the spout seal portion and the tip of the opening start portion, and is parallel to the inner edge of the first portion of the spout seal portion. is less than 8/9 of the distance between the imaginary lines,
the tip of the opening start portion is positioned between the first portion of the first half-cut line and the first portion of the second half-cut line ;
The pouch, wherein the first portion of the first half-cut line and the first portion of the second half-cut line each have a radius of curvature of 2.0 mm or more and 5.0 mm or less. 2. The pouch of claim 1, wherein said second portion of said first half-cut line and said second portion of said second half-cut line are each straight. 2. The pouch according to claim 1, wherein said second portion of said first half-cut line and said second portion of said second half-cut line are each curved to be convex downward.

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