JP7419659B2 - pouch - Google Patents

Description

The present invention relates to a pouch.

Conventionally, refill pouches have contained contents including liquids, powders, granules, and the like. In such a pouch, it is necessary to refill the contents from the pouch into a container such as a bottle.

Some of these refill pouches are equipped with a connecting tab to prevent the spout from being accidentally opened during transportation or other handling of the pouch (for example, Patent Document 1 reference).

Japanese Patent Application Publication No. 2011-213408

Currently, in such a pouch with a connecting tab, it is desired to be able to cut off the entire connecting tab in one action when opening the pouch. However, when the pouch is opened, the connecting tab may be cut in an unintended direction, and a portion of the connecting tab may remain.

The present invention has been made to solve the above problems. That is, the object is to provide a pouch that allows the entire connecting tab to be cut off with one action when the pouch is opened.

The present invention includes the following inventions.
[1] A pouch including a front film, a back film facing the front film, an upper edge, a lower edge, and a first pouch extending between the upper edge and the lower edge. a side edge and a second side edge, a main body part, a spout part integrated with the main body part, and a connecting tab provided in a continuous manner with the spout part, the spout part being , the connection tab is provided at a corner formed by the upper edge and the first side edge, and the spout portion includes a first unsealed portion that becomes a flow path when pouring out the contents; includes a second unsealed part communicating with the first unsealed part, an opening initiation means is provided at the top of the pouch, a first half cut line is provided across the spout part, and the connection A perforation line passing through the pouch for cutting off the tab is provided, and the perforation line is located above the first unsealed portion and below the first unsealed portion. a first part extending downward from the unsealing starting means; and a first part located closer to the first side edge than the first part; a second portion extending upward from the first side edge side; and a connecting portion connecting the first portion and the second portion, wherein the connecting portion of the first perforation line extends downwardly. It is curved to be convex, and the second perforation line is located closer to the upper edge than the first portion and a first portion extending upward from the first side edge side to the second side edge side. , a second portion extending upward from the first side edge side, a third portion connected to the second portion, and a connecting portion connecting the first portion and the second portion. The connecting portion of the second perforation line is curved to be convex toward the second side edge, and passes through a position closest to the first side edge of the second unsealed portion. , and when an imaginary line is drawn in a direction perpendicular to the first side edge, the third portion of the second perforation line is located below the imaginary line and approaches the second unsealed portion. A pouch that is curved like that.

[2] The pouch according to [1] above, wherein the third portion of the second perforation line satisfies at least one of the following requirements (1) and (2).
Requirement (1) The distance from the first side edge in the direction perpendicular to the first side edge is 3 mm or more.
Requirement (2) The second unsealed portion is located closer to the second side edge than the position closest to the first side edge.

[3] The first half cut line and the second cut line touch, and the shortest distance from the contact point of the first half cut line and the second cut line to the third portion of the second cut line is, The pouch according to [1] or [2] above, which is 0.5 mm or less.

[4] The pouch according to any one of [1] to [3] above, wherein the third portion of the second perforation line has a radius of curvature of 0.5 mm or more and 2 mm or less.

[5] The first tear line includes a third portion connected to the second portion of the first tear line, and the third portion of the first tear line is connected to the first unsealed portion. The pouch according to any one of [1] to [4] above, which is curved so as to approach each other.

[6] The pouch according to [5] above, wherein the third portion of the first perforation line has a radius of curvature of 0.5 mm or more and 2 mm or less.

[7] Any one of [1] to [6] above, further comprising a pouring auxiliary member disposed at a position between the front film and the back film in the first unsealed part. The pouch described in .

According to the present invention, it is possible to provide a pouch whose entire connecting tab can be cut off with one action when opening the pouch.

FIG. 1 is a front view of a pouch according to an embodiment. FIG. 2 is a plan view for explaining the dimensions of each component of the pouch shown in FIG. 1. FIG. 3 is an enlarged view of the spout portion and the connection tab periphery of FIG. 1. FIG. 4 is a front view of the pouring auxiliary member of FIG. 1. FIG. 5 is a diagram illustrating the positional relationship around the spout portion and the connecting tab in FIG. 1. FIG. 6 is a diagram illustrating another positional relationship around the spout portion and the connecting tab in FIG. 1. FIG. 7 is an enlarged view of the vicinity of another spout and a connecting tab of the pouch according to the embodiment. FIG. 8 is a diagram illustrating the positional relationship around the spout portion and the connecting tab in FIG. 7. FIG. 9 is an enlarged view of the area around the other spout and connection tab of the pouch according to the embodiment. FIG. 10 is a cross-sectional view of the packaging material used for the pouch according to the embodiment. FIG. 11 is a cross-sectional view of another packaging material used in the pouch according to the embodiment. FIG. 12 is an unsealed view of the pouch shown in FIG. 1.

Hereinafter, a pouch according to an embodiment of the present invention will be described with reference to the drawings. As used herein, terms such as "film", "sheet", etc. are not distinguished from each other solely on the basis of differences in designation. Therefore, for example, the term "film" is used to include members also called sheets. FIG. 1 is a front view of the pouch according to the present embodiment, FIG. 2 is a plan view for explaining the dimensions of each component of the pouch shown in FIG. 1, and FIG. It is an enlarged view of the area around the connecting tab. 4 is a front view of the spouting auxiliary member in FIG. 1, FIG. 5 is a diagram illustrating the positional relationship around the spout portion and the connecting tab in FIG. 1, and FIG. 6 is a diagram illustrating the spout portion and the connecting tab in FIG. FIG. 7 is a diagram illustrating other positional relationships around the tab. FIGS. 7 and 9 are enlarged views of other spout portions and connection tabs of the pouch according to the present embodiment. 8 is a diagram illustrating the positional relationship around the spout portion and the connecting tab in FIG. 7, FIG. 10 is a cross-sectional view of the packaging material used in the pouch according to this embodiment, and FIG. 12 is a cross-sectional view of another packaging material used in such a pouch, and FIG. 12 is an unsealed view of the pouch shown in FIG. 1.

＜＜＜Pouch＞＞＞
The pouch 10 shown in FIG. 1 has a storage space for storing contents. The contents include, but are not particularly limited to, liquids, powders, granules, and the like. Specifically, the contents include shampoo, conditioner, body soap, household liquid detergent, lotion, and the like. However, the contents are not limited to these.

The pouch 10 includes at least a front surface 10A and a back surface 10B. The pouch 10 shown in FIG. 1 is in a state where the pouch 10 is made into a substantially planar shape without expanding the gusset folded portions 21, which will be described later. has a bottom surface in addition to a front surface 10A and a back surface 10B.

The pouch 10 has an upper edge 10C, a lower edge 10D, and a first side edge 10E and a second side edge 10F extending between the upper edge 10C and the lower edge 10D.

The ratio (H/W1) of the height H (see FIG. 2) of the pouch 10 to the width W1 (see FIG. 2) of the pouch 10 may be 1 or more and 2.5 or less. If H/W1 is 1 or more, more contents can be accommodated, and if H/W1 is 2.5 or less, the pouch 10 can stably stand on its own before opening. The width W1 of the pouch 10 is the length of the pouch 10 in the lateral direction DR1. Specifically, the width W1 of the pouch 10 is the length from the first side edge to the second side edge of the pouch. When the pouch width W1 is not constant, the pouch width is set to the shortest value. The height H of the pouch 10 is the length of the pouch 10 in the height direction DR2. Specifically, the height H of the pouch 10 is the length from the lower edge of the bottom of the pouch to the upper edge of the top. If the length of the pouch is not constant, the height of the pouch shall be the maximum value. The width W1 of the pouch 10 may be 100 mm or more and 200 mm or less, and the height H of the pouch 10 may be 100 mm or more and 300 mm or less. The dimensions of the pouch and the dimensions of each component constituting the pouch are values measured with the pouch in a substantially flat state without expanding the gusset folded portion of the pouch. Further, in this specification, the positions of "upper", "lower", "side", and "bottom" refer to the positions in which the pouch stands on its own with the gusset folded portions described later expanded.

The pouch 10 is composed of a front film 11, a back film 12, and a bottom film 13. However, the pouch only needs to be composed of at least one film, and does not need to be composed of a front film, a back film, and a bottom film.

The pouch 10 includes a main body part 20 having a storage space in which the contents are stored, a spout part 30 integrated with the main body part 20, a connecting tab 40 provided in a continuous manner with the spout part 30, and a spout part 30 that is connected to the spout part 30. A dispensing assisting member 50 is provided to assist dispensing during dispensing. Although the pouch 10 includes the pouring assisting member 50, it may not include the pouring assisting member 50. Furthermore, the pouch 10 is provided with an opening initiation means 60, a perforation line 70, and a first half-cut line 80. The term "connection tab" as used herein means a portion that is cut off by opening the pouch along the perforation line and the first half-cut line.

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

<Gusset folding part>
The gusset folding portion 21 is composed of a bottom film 13 inserted between the bottom of the front film 11 and the bottom of the back film 12.

The ratio (W2/H) of the width W2 (see FIG. 2) of the gusset folded portion 21 to the height H of the pouch 10 may be 0.06 or more and 0.45 or less. If W2/H is 0.06 or more, more contents can be accommodated. Further, if the above ratio is 0.45 or less, when the pouch 10 is made to stand on its own after opening, it is possible to stably make the pouch 10 stand on its own. The width W2 of the gusset folded portion 21 is the length of the gusset folded portion 21 in the height direction DR2. Specifically, it is the length from the lower edge 10D of the pouch 10 to the fold line 21A. When the width of the gusset folded portion is not constant, the width of the gusset folded portion is set to the shortest value. The width W2 of the gusset folded portion 21 may be greater than or equal to 20 mm and less than or equal to 45 mm.

The main body portion 20 includes a first side seal portion 22, a second side seal portion 23, a first bottom seal portion 24, a second bottom seal portion 25, a bottom auxiliary seal portion 26, and a second top seal portion 27. You can leave it there. Although the upper part of the pouch 10 is open in FIG. 1, after filling the storage space with the contents, it is heat-sealed to form a first upper seal surrounded by an upper edge 20E and a chain double-dashed line in FIG. A first upper seal portion is formed in the region R, and the pouch 10 is sealed.

<First side seal portion and second side seal portion>
The first side seal part 22 is a part where the front film 11 and the back film 12 are joined to each other in the first side part 20C, and the second side seal part 23 is a part in the second side part 20D. This is the part where the front film 11 and the back film 12 are joined to each other. The first side seal portion 22 and the second side seal portion 23 are formed by heat sealing packaging materials 90 to be described later.

The outer edge 22A of the first side seal part 22 is a part of the first side edge 10E, and the outer edge 23A of the second side seal part 23 is a part of the second side edge 10F.

It is preferable that the width W3 (see FIG. 2) of the first side seal part 22 and the second side seal part 23 is, for example, 5 mm or more and 15 mm or less, respectively. If the width W3 of the first side seal part 22 and the second side seal part 23 is each 5 mm or more, the first side seal part 22 and the second side seal part 23 can reliably seal, Moreover, if it is 15 mm or less, a wider accommodation space can be secured. In this specification, the "width" of each seal portion means the length in the direction perpendicular to the extending direction of the seal portion. Note that 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 perpendicular to the direction in which the seal portion extends.

<First bottom seal portion and second bottom seal portion>
The first bottom seal part 24 is a part where a part of the bottom of the front film 11 and a part of the bottom film 13 are joined to each other in the gusset folded part 21, and the second bottom seal part 25 is a part of the gusset folded part 21. This is a part where a part of the bottom of the back film 12 and a part of the bottom film 13 in 21 are joined to each other. The first bottom seal part 24 is formed by heat sealing the front film 11 and the bottom film 13, and the second bottom seal part 25 is formed by heat sealing the back film 12 and the bottom film 13. It is formed.

<Bottom auxiliary seal part>
The bottom auxiliary seal portion 26 is formed at both edges of the bottom portion 20B of the main body portion 20 on the lateral direction DR1 side. The bottom auxiliary seal portion 26 is a portion where the front film 11 and the back film 12 are joined to each other. The auxiliary bottom seal portion 26 is formed by heat-sealing the front film 11 and the back film 12 through a notch provided in the bottom film 13. From the viewpoint of expanding the gusset folded part when filling the storage space with the contents, it is necessary that the first bottom seal part and the second bottom seal part be separated at the center of the bottom of the pouch. If the seal part and the second bottom seal part are completely separated, when the storage space is filled with contents, the first bottom seal part and the second bottom seal part cannot withstand the weight of the contents, and the first bottom seal part and the second bottom seal part cannot bear the weight of the contents. There is a risk that the gap between the bottom seal part and the second bottom seal part will open, making it difficult for the pouch to stand on its own. Moreover, since the base material layers described below cannot be heat-sealed to each other, the first bottom seal portion and the second bottom seal portion where the base material layers face each other cannot be heat-sealed as they are. Therefore, by forming the bottom auxiliary seal part 26, only the both ends of the first bottom seal part 24 and the second bottom seal part 25 are joined. Therefore, when filling the contents, the pouch 10 can stably stand on its own without hindering the spread of the bottom film 13.

<Second upper seal part>
The second upper seal part 27 extends in the height direction DR2 of the pouch 10 in the upper part 20A, and may be connected to a spout seal part 31, which will be described later. By forming such a second upper seal portion 27, a certain degree of depth can be ensured at the opening, making it easier to fill the main body portion 20 with contents through the opening. I can do it.

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

The spout part 30 is configured to extend along a pouring direction DR3 (see FIG. 3) in which the contents are poured out when the contents are refilled into a container such as a bottle. By providing such a spout portion 30, the flow of the contents when poured out from the pouch 10 can be adjusted, thereby making it possible to easily refill the contents.

The spout portion 30 includes a spout seal portion 31 and a first unsealed portion 32 that serves as a flow path defined by an inner edge 31A of the spout seal portion 31.

<Spout seal part>
The spout sealing part 31 is a part where a part of the front film 11 and a part of the back film 12 in the spout part 30 are joined to each other. The spout seal portion 31 is connected to a connecting tab seal portion 41 that constitutes the connecting tab 40 and will be described later.

As shown in FIG. 3, the spout seal portion 31 includes a pair of opposing seal portions 31B and 31C that face each other with the first unsealed portion 32 in between.

<First unsealed part>
The first unsealed portion 32 is a portion that becomes a flow path through which the contents pass when discharging the contents from the pouch 10. Since the pouch 10 shown in FIG. 1 is unopened, the first unsealed portion 32 is not connected to the outside, but when the connecting tab 40 is cut off by opening the pouch, the first unsealed portion 32 is unsealed. 1 unsealed portion 32 is connected to the outside. Thereby, the contents can be discharged from the pouch 10 via the first unsealed portion 32.

<<Connection tab>>
The connecting tab 40 is connected to the spout portion 30 . As shown in FIG. 3, the connecting tab 40 includes a connecting tab seal portion 41 and a second unsealed portion 42 defined by an inner edge 41A of the connecting tab seal portion 41. An inner edge 41A of the connecting tab seal portion 41 is connected to an inner edge 31A.

<Second unsealed part>
The second unsealed portion 42 communicates with the first unsealed portion 32 . The second unsealed portion 42 is sealed by the connecting tab seal portion 41 and is not connected to the outside. Although the tip of the second unsealed portion 42 has an arc shape, it does not have to be an arc shape.

<<Pour auxiliary member>>
The pouring auxiliary member 50 is for securing the first unsealed portion 32, which is a flow path, and for suppressing collapse. The pouring auxiliary member 50 is arranged at a position between the front film 11 and the back film 12 in the first unsealed portion 32 . The pouring auxiliary member 50 is attached to the back film 12 by heat sealing.

The pouring auxiliary member 50 is made of an elastic body made of plastic. By configuring the pouring auxiliary member 50 from an elastic body, the openness and shape retention of the pouring path can be maintained, and the pourability of the contents can be improved.

The pouring auxiliary member 50 includes a rectangular bottom portion 51 and a rectangular side wall portion 52 erected upward from the bottom portion 51, as shown in FIG. The pouring auxiliary member 50 can be created by integrally molding the bottom part 51 and the side wall part 52 by extrusion molding.

<Bottom>
The bottom portion 51 has a thin portion 51A that is thinner than other portions. Since the bottom part 51 has the thin part 51A, the bottom part 51A of the pouring auxiliary member 50 can be attached to the back film 12 at a low temperature, so that productivity can be improved.

The bottom portion 51 may include a protruding piece 51B extending laterally from the bottom portion 51. By providing the bottom portion 51 with the protruding piece 51B, it becomes easier to mold the pouring auxiliary member 50 when it is produced by extrusion molding, and it also becomes easier to transport the pouring assisting member 50 when it is transported.

<Side wall part>
The side wall portion 52 may have a tapered shape toward the tip portion 52A of the side wall portion 52. By forming the side wall portion 52 in such a shape, it is possible to reduce the repulsive force caused by the elastic deformation of the spout auxiliary member 50, thereby suppressing the occurrence of floating in the spout seal portion 31 and thinning of the spout seal portion 31. can do.

The side wall portion 52 may have a shape in which the base portion 52B of the side wall portion 52 is made thinner. By forming the side wall portion 52B in such a shape, it is possible to easily elastically deform the pouring assisting member 50 so that the upper opening becomes smaller, and when forming the spout sealing portion 31, the pouring assisting member 50 The member 50 is elastically deformed and the tensile force and external force applied to the front film 11 can be further reduced.

<<Means for starting opening>>
The opening initiation means 60 can serve as a starting point when opening the pouch 10, and is provided at the top of the pouch 10. Examples of the unsealing initiation means 60 include a notch, a notch, and the like. The opening initiation means 60 shown in FIG. 1 is a cutout.

＜＜Cut line＞＞
The perforation line 70 passes through the pouch 10. The perforation line 70 includes a first perforation line 71 located above the first unsealed portion 32 and a second perforation line 72 located below the first unsealed portion 32 . The perforation line 70 is composed of a cutout that passes through the pouch 10. The punched portion may be in the form of one continuous line, or may include a connecting portion located between two adjacent punched portions. By using the perforation line 70 having such a structure, the work of breaking the perforation line 70 can be made easier.

<First cutting line>
As shown in FIG. 3, the first perforation line 71 includes a first portion 71A extending downward from the unsealing initiation means 60, and a first portion 71A located closer to the first side edge 10E than the first portion 71A. A second portion 71B extending upward from the first side edge 10E side from the 71A side, a third portion 71C connected to the second portion 71B, and a connecting portion 71D connecting the first portion 71A and the second portion 71B. Contains. Note that the first perforation line 71 does not need to include the third portion 71C as long as it includes the first portion 71A, the second portion 71B, and the connecting portion 71D.

(Part 1)
The first portion 71A is connected to the opening initiation means 60. Thereby, when the unsealing is opened from the unsealing starting means 60, it is possible to ensure that the break line reaches the first portion 71A. The first portion 71A extends downward from the unsealing initiation means 60, and specifically extends linearly in a direction substantially orthogonal to the upper edge 10C.

(Second part)
The second portion 71B extends linearly in the direction DR3 in which the first unsealed portion 32 extends. Since the second portion 71B extends in the direction DR3, when the pouch 10 is opened along the first perforation line 71, the break line in the second portion 71B is close to the first unsealed portion 32. This prevents the package from being opened from an unintended location.

(Third part)
The third portion 71C is curved so as to approach the first unsealed portion 32. Since the third portion 71C is curved in this way, the break line can be connected to the first half-cut line 81 without applying much force when opening the package.

When the third portion 71C is arcuate, the radius of curvature of the third portion 71C is preferably 0.5 mm or more and 2 mm or less. If this radius of curvature is 0.5 mm or more, the broken line can be easily connected to the first half-cut line 81 without applying much force, and if it is 2 mm or less, the broken line can be easily connected to the first unsealed part 32. can be prevented from reaching. The lower limit of the radius of curvature is more preferably 0.8 mm or more, or 1 mm or more, and the upper limit is more preferably 1.5 mm or less, or 1.3 mm or less.

The length of the third portion 71C is preferably 0.5 mm or more and 2 mm or less. If this length is 0.5 mm or more, the broken line can be easily connected to the first half-cut line 81 without applying much force, and if it is 2 mm or less, the broken line can be easily connected to the first unsealed part 32. can be prevented from reaching. The lower limit of the length of the third portion is more preferably 0.8 mm or more, or 1 mm or more, and the upper limit is more preferably 1.5 mm or less, or 1.3 mm or less.

The shortest distance D1 (see FIG. 5) between the tip 71C1 of the third portion 71C and the first unsealed portion 32 is preferably 1 mm or more. If the shortest distance D1 is 1 mm or more, reaching the first unsealed portion 32 can be suppressed.

(Connection part)
The connecting portion 71D is curved so as to be convex downward. By curving the connecting portion 71D in this manner, when the connecting tab 40 is cut out, a notch 10H, which will be described later, can be formed between the second upper seal portion 27 and the opposing seal portion 31B. The cutout is preferably configured such that the cutout comes into contact with the tip of the mouth of the bottle when the contents of the pouch are refilled into the bottle. This allows the pouch to be held more stably with respect to the bottle.

When the connecting portion 71D is arcuate, the radius of curvature of the connecting portion 71D is preferably 1 mm or more and 10 mm or less. If this radius of curvature is 1 mm or more, it is possible to prevent the first unsealed portion 32 from breaking, and if it is 10 mm or less, the pouch 10 can be opened without applying much force. . The lower limit of the radius of curvature is more preferably 2 mm or more, or 3 mm or more, and the upper limit is more preferably 8 mm or less, or 5 mm or less.

<Second cutting line>
The second perforation line 72 extends from the first side edge 10E side upward to the second side edge 10F side, and is located closer to the upper edge 10C than the first portion 72A, and is located on the first portion 72A side. A second portion 72B extending upward from the first side edge 10E side, a third portion 72C connected to the second portion 72B, and a connecting portion 72D connecting the first portion 72A and the second portion 72B. Contains. Note that the second perforation line 72 does not need to include the third portion 72C as long as it includes the first portion 72A, the second portion 72B, and the connecting portion 72D.

(Part 1)
The first portion 72A may be in contact with the first side edge 10E, but may not be in contact with the first side edge 10E.

(Second part)
The second portion 72B extends linearly along the direction DR3 in which the first unsealed portion 32 extends. Since the second portion 72B extends in the direction DR3, when the pouch 10 is opened along the second perforation line 72, the break line in the second portion 72B is close to the first unsealed portion 32. This prevents the package from being opened from an unintended location.

(Third part)
The third portion 72C is formed by drawing a fourth imaginary line IL4 passing through the position P1 (see FIG. 5) closest to the first side edge 10E of the second unsealed portion 42 and perpendicular to the first side edge 10E. At this time, it is located below the fourth imaginary line IL4 and is curved so as to approach the second unsealed portion 42.

The third portion 72C has a distance D2 (see FIG. 5) from the first side edge 10E of 3 mm or more in the direction perpendicular to the first side edge 10E, and/or the third portion 72C is the first portion of the second unsealed portion 42. It is preferable that it is located closer to the second side edge 10F than position P1 (see FIG. 5) on the side edge 10E. Since force is likely to be applied in the direction in which the half-cut line extends, if the distance between the third part of the second perforation line and the first side edge is short, breakage will occur along the second perforation line when opening the package. Otherwise, the breakage may progress toward the first side edge side of the second tear line, and a portion of the connecting tab may remain. On the other hand, the distance D2 is 3 m or more, and/or the third portion 72C is located closer to the second side edge 10F than the position P1 of the second unsealed portion 42 that is closest to the first side edge 10E. By doing so, the distance D1 can be secured to a certain extent, so that it is possible to suppress the breakage from progressing further toward the first side edge 10E than the second perforation line 72. Thereby, it is possible to prevent a portion of the connecting tab 40 from remaining.

When the third portion 72C is arcuate, the radius of curvature of the third portion 72C is preferably 0.5 mm or more and 2 mm or less. If this radius of curvature is 0.5 mm or more, it is possible to suppress the breakage from progressing toward the first side edge 10E side from the second perforation line 72, and if it is 2 mm or less, the second unsealed portion 42 can be prevented from reaching . The lower limit of the radius of curvature is more preferably 0.7 mm or more, or 1 mm or more, and the upper limit is more preferably 1.5 mm or less, or 1 mm or less.

The length of the third portion 72C is preferably 0.5 mm or more and 2 mm or less. If this length is 0.5 mm or more, it is possible to suppress the breakage from progressing toward the first side edge 10E side from the second perforation line 72, and if it is 2 mm or less, the second unsealed portion 42 can be prevented from reaching . The lower limit of the length of the third portion is more preferably 0.7 mm or more, or 1 mm or more, and the upper limit is more preferably 1.5 mm or less, or 1 mm or less.

The second perforation line 72 is in contact with a first half-cut line 80, which will be described later. It is preferable that the shortest distance to the portion 72C is 0.5 mm or less. If the shortest distance is 0.5 mm or less, it is possible to further suppress the breakage from progressing toward the first side edge 10E side from the second perforation line 72.

(Connection part)
The connecting portion 72D is curved so as to be convex toward the second side edge 10F. By curving the connecting portion 72D in this manner, when the connecting tab 40 is cut out, a notch 10I, which will be described later, can be formed between the first side seal portion 22 and the opposing seal portion 31C. The cutout is preferably configured such that the cutout comes into contact with the tip of the mouth of the bottle when the contents of the pouch are refilled into the bottle. This allows the pouch to be held more stably with respect to the bottle.

The radius of curvature of the connecting portion 72D is preferably 1 mm or more and 10 mm or less. If this radius of curvature is 1 mm or more, it is possible to suppress the progression of breakage to the first unsealed portion 32, and if it is 10 mm or less, the pouch 10 can be held more stably with respect to the bottle. . The lower limit of the radius of curvature is more preferably 2 mm or more, or 3 mm or more, and the upper limit is more preferably 8 mm or less, or 5 mm or less.

<<First half cut line>>
The "half-cut line" in this specification is a cutting line that does not penetrate the front film and the back film. The first half-cut line is formed so as to pass through the base material layer, which will be described later, but not through the sealant layer. The first half-cut line 80 has the function of maintaining the sealed state of the pouch 10 while guiding the opening of the pouch 10 along the first half-cut line 80 when the pouch 10 is opened.

The first half-cut line 80 is provided to cross the spout portion 30. By forming the first half-cut line 80 across the spout section 30, when the pouch 10 is opened, the first unsealed section 32 is connected to the outside via the spout 30B, allowing the contents to be removed from the pouch 10. Can be discharged.

One or more first half-cut lines 80 may be provided, but it is preferable that three or more first half-cut lines 80 are provided as shown in FIG. By providing three or more first half-cut lines 80, even if a break line deviates from the first half-cut line 80, the break line can not collide with another first half-cut line 80. Since the breaking line can be advanced along this first half-cut line 80, the breaking can be reliably advanced along the first half-cut line 80. One first half-cut line 80 shown in FIG. 1 is provided, and five first half-cut lines 80 shown in FIG. 7 are provided.

When three or more first half-cut lines 80 are provided, the interval between the first half-cut lines 80 is preferably 0.5 mm or more and 2.5 mm or less. If this interval is within the above range, the breaking line can collide with another first half-cut line 80 and advance along this first half-cut line 80. The lower limit of this interval is more preferably 0.7 mm or more, or 1 mm or more, and the upper limit is more preferably 1.5 mm or less, or 1.3 mm or less.

The first half-cut line 80 can be formed by laser processing. By forming the first half-cut line 80 by laser processing, the first half-cut line 80 can be easily and accurately formed. Furthermore, by selecting the laser beam, the first half-cut line 80 can be formed only in a desired layer. The laser for forming the first half-cut line 80 is not particularly limited, but an excimer laser, a carbon dioxide laser, a YAG laser, a semiconductor laser, a helium-neon laser, an argon ion laser, or the like can be used.

The first half-cut line 80 includes a linear first portion 80A in contact with the first perforation line 71 and a curved second portion 80B in contact with the second perforation line 72.

(Part 1)
As shown in FIG. 6, a first line that is perpendicular to the direction DR3 in which the first unsealed portion 32 extends and passes through a first intersection IP1 between the first cut line 71 and the first portion 80A of the first half-cut line 80. An imaginary line IL1 is drawn, and the first unsealed portion 32 extends through the first intersection IP1 and the midpoint MP1 of the distance between the first imaginary line IL1 and the second intersection IP2 of the second portion 72B of the second perforation line 72. When a second imaginary line IL2 parallel to the direction DR3 is drawn, the first portion 80A of the first half-cut line 80 preferably extends beyond the second imaginary line IL2. Since the first portion 80A of the first half-cut line 80 is straight, force is easily applied when opening the pouch 10, and even if the first portion 80A is curved, it breaks smoothly. progresses. Therefore, the longer the linear first portion 80A is, the easier it is to break. According to this embodiment, since the linear first portion 80A exceeds the second imaginary line IL2, the first portion 80A is longer than the second portion 80B in the spout portion 30. This allows the package to be opened more easily.

When three or more first half-cut lines 80 are provided, first, as shown in FIG. A midpoint MP2 of the distance between the first half-cut line 80 located on the edge 10C side and the first half-cut line 80 located on the lowest edge 10D side is determined. Then, focusing on the first half-cut line 80 passing through this midpoint MP2, when calculating the second virtual line IL2 in the same manner as above, the first portion 80A of the first half-cut line 80 is 2, preferably beyond the virtual line IL2.

The first portion 80A of the first half-cut line 80 is in contact with the first perforation line 71. In FIG. 3, the first portion 80A of the first half-cut line 80 is in contact with the third portion 71C of the first perforation line 71. In FIG. Since the first portion 80A is in contact with the third portion 71C, 40 of the connecting tabs can be cut off without applying much force when opening the pouch 10. In the case where three or more first half-cut lines are provided, "the first portion of the first half-cut line touches the first cutting line" means that the entire three or more first half-cut lines are It is considered as the first half-cut line of the book, and it means that the first part of the first half-cut line, which is considered as one line, should be in contact with the first cutting line, and all the individual first half-cut lines It does not need to be in contact with the first cutting line. In addition, in this specification, "the first portion of the first half-cut line is in contact with the first cutting line" means that if the first portion of the first half-cut line is in contact with the first cutting line, They can often intersect. The first portion of the first half-cut line shown in FIG. 3 may intersect with the first cut line. Note that when there are three or more first half-cut lines 80, they may be in contact not only with the third portion 71C but also with the second portion 71B.

(Second part)
The second portion 80B of the first half-cut line 80 is curved away from the first side edge 10E. Since the second portion 80B is curved in this way, the break line can be directed downward, so that when the pouch 10 is opened, the break goes beyond the second cut line 72 and faces the first side edge 10E. can be prevented from proceeding.

When the second portion 80B is arcuate, the radius of curvature of the second portion 80B is preferably 2 mm or more and 20 mm or less. If this radius of curvature is 2 mm or more, the fracture can be made along the second portion 80B, and if it is less than 20 mm, the fracture can be prevented from proceeding beyond the second perforation line 72 toward the first side edge 10E. It can be suppressed. The lower limit of the radius of curvature is more preferably 8 mm or more, or 10 mm or more, and the upper limit is more preferably 15 mm or less, or 13 mm or less.

The second portion 80B is provided so as not to exceed the second perforation line 72. By providing the second portion 80B in this manner, when the pouch 10 is opened, it is possible to prevent the break from proceeding beyond the second perforation line 72 toward the first side edge 10E. Although the second portion 80B shown in FIG. 3 is in contact with the second perforation line, it may not be in contact with the second perforation line 72.

When three or more first half-cut lines 80 are provided, the first half-cut lines 80 do not intersect with each other when the pouch 10 is viewed from the front. Since the first half-cut lines 80 do not intersect with each other, the break line can be advanced along the first half-cut lines 80 when the pouch 10 is opened.

When there are three or more first half-cut lines 80, the pouch 10 may include a second half-cut line 85 that is in contact with at least two first half-cut lines 80, as shown in FIG. . By providing the second half-cut line 85 in this way, even if the break line deviates from the first half-cut line 80, once the break line reaches the second half-cut line 85, other first Since the cutting can be guided along the half-cut line 80, the breakage can be reliably advanced along the first half-cut line 80.

Pouch 10 is constructed from packaging material 90. That is, the front film 11, the back film 12, and the bottom film 13 are made of packaging material 90. The packaging material includes a base layer and a sealant layer. The packaging material 90 shown in FIG. 10 includes at least a first base layer 91, a printed layer 92, a first bonding layer 93, a second base layer 94, a second bonding layer 95, and a sealant layer 96 in this order. There is. Note that the base material layer may include at least one of the first base material layer 91 and the second base material layer 94. In addition, the packaging material 100 shown in FIG. 11 includes, for example, a first base layer 91, a printed layer 92, a first bonding layer 93, a barrier layer 97, a second base layer 94, a second bonding layer 95, a sealant layer. 96 in this order.

<First base layer>
The first base layer 91 is, for example, a stretched base layer stretched in a predetermined direction. The first base layer 91 functions as a base layer for giving the packaging material 90 a predetermined strength. The first base layer 91 may be a uniaxially stretched film stretched in one predetermined direction, or may be a biaxially stretched film stretched in two predetermined directions. The stretching direction of the first base layer 91 is not particularly limited.

The first base layer 91 contains polyester as a main component, for example. For example, the first base layer 91 contains 51% by mass or more of polyester. Examples of polyester include polyethylene terephthalate (hereinafter also referred to as PET), polybutylene terephthalate (hereinafter also referred to as PBT), and the like. Note that 51% by mass or more of polyester in the first base layer 91 may be composed of one type of polyester, or may be composed of two or more types of polyester.

The thickness of the first base layer 91 can be, for example, 5 μm or more and 30 μm or less. If the thickness of the first base layer 91 is 5 μm or more, the self-supporting nature of the pouch 10 can be improved, and if the thickness is 30 μm or less, it can have a predetermined strength. The thickness of the first base layer 91 is determined by measuring the thickness at 10 random locations from a cross-sectional photograph of the base layer taken using an optical microscope, and finding the arithmetic mean value of the measured thicknesses. Note that in the pouch, the first base layer 91 is arranged at the outermost side.

<Print layer>
The printing layer 92 is a layer containing a coloring material and a binder resin. By forming the printing layer 92, a pattern can be formed on the pouch 10. The term "picture" in this specification is not particularly limited, and broadly includes, for example, figures, characters, designs, patterns, symbols, patterns, marks, and the like.

The printing layer 92 may also contain any other additives. Examples of additives include lubricants, antiblocking agents, fillers, curing agents, pigment dispersants, antifoaming agents, leveling agents, waxes, silane coupling agents, preservatives, antioxidants, ultraviolet absorbers, and rust preventives. agent, plasticizer, flame retardant, color developer, etc. These additives are used especially for the purpose of improving printing suitability, printing effects, etc., and the type and amount used can be appropriately selected depending on the printing method, printing substrate, and printing conditions. The printed layer 43 can be formed on the base material layer 41 by a printing method such as gravure printing.

(color material)
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 the binder resin include linseed oil, cut oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin modified resin, shellac, alkyd resin, phenolic resin, maleic resin, natural resin, hydrocarbon resin, 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, amino alkyd Examples include polymers of type resins, nitrocellulose, ethylcellulose, chlorinated rubber, cyclized rubber, (meth)acrylate compounds, and mixtures thereof.

<Joining layer>
As the first bonding layer 93 and the second bonding layer 95, for example, an adhesive commonly used in the dry lamination method, which is known per se, can be used, such as a polyvinyl acetate adhesive, a polyacrylic ester adhesive, etc. Agents, cyanoacrylate adhesives, ethylene copolymer adhesives, cellulose adhesives, polyester adhesives, polyamide adhesives, amino resin adhesives, epoxy adhesives, polyurethane adhesives, etc. can be used. can. A polyurethane adhesive is a cured product of a polyol compound and an isocyanate compound.

<Second base layer>
The second base layer 94 is, for example, a base layer stretched in a predetermined direction, like the first base layer 91. Like the first base layer 91, the second base layer 94 also functions as a base layer for giving the packaging material 90 a predetermined strength. Similarly to the case of the first base layer 91, the stretching direction of the second base layer 94 is not particularly limited.

The second base material layer 94 contains polyamide as a main component, for example. For example, the second base layer 94 contains 51% by mass or more of polyamide. Examples of polyamides include aliphatic polyamides (nylon) and aromatic polyamides, as in the case of the first base layer 94.

The thickness of the second base layer 94 can be, for example, 5 μm or more and 30 μm or less. If the thickness of the second base material layer 94 is 5 μm or more, the feeling of stiffness can be improved, and if the thickness is 30 μm or less, it can have a predetermined strength.

<Sealant layer>
The sealant layer 96 is provided to seal the accommodation space of the pouch 10 by overlapping and heat-sealing two packaging materials. Therefore, in the pouch 10, the sealant layer 96 is arranged closest to the accommodation space.

The sealant layer 96 may be any material as long as it can be melted by heat to fuse the opposing packaging materials 90 to each other. As a material constituting the sealant layer 96, for example, polyethylene (PE) or the like can be used. Here, polyethylene includes not only ethylene homopolymers but also copolymers generally recognized as polyethylene, such as copolymers of ethylene and α-olefin monomers. Further, as the polyethylene used in the sealant layer, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), etc. can be suitably used. Note that a plurality of sealant layers may be provided.

The thickness of the sealant layer 96 can be 10 μm or more and 200 μm or less. If the thickness of the sealant layer 96 is 10 μm or more, it has excellent impact resistance against drops that may occur during the distribution process of the pouch 10, and if it is 200 μm or less, it has excellent handling properties such as ease of filling the contents. The lower limit of the thickness of the sealant layer 96 is more preferably 30 μm or more or 70 μm or more from the viewpoint of further improving the self-supporting nature of the pouch 10, and the upper limit of the thickness of the sealant layer 96 is more preferably 30 μm or more or 70 μm or more, so that the pouch 10 can be more easily folded. From this point of view, it is more preferable that the thickness is 150 μm or less. The thickness of the sealant layer 92 can be measured by the same method as the thickness of the first base layer 91.

<Barrier layer>
The barrier layer 97 is a layer for improving gas and liquid barrier properties. The specific structure of the barrier layer 97 is not particularly limited, but may include, for example, a vapor deposition layer containing an inorganic substance such as aluminum or an inorganic oxide such as aluminum oxide or silicon oxide formed by vapor deposition, a metal foil layer such as aluminum, or a vapor deposition layer containing an inorganic oxide such as aluminum oxide or silicon oxide. , an ethylene-vinyl alcohol copolymer layer formed by coating, specifically EVOH, and the like.

Specific examples of the packaging material 90 include the following packaging materials. Note that "/" is used as a notation to indicate a boundary between layers when listing layers. Layers shall be written from the outside of the pouch to the inside. That is, the layer described on the rightmost side is the sealant layer. Further, in the Al vapor-deposited polyamide film, the vapor-deposited layer side is the stretched PET film side.
Stretched PET film/printed layer/bonding layer/stretched polyamide film/bonding layer/PE layer Stretched PET film/printed layer/bonding layer/Al-deposited polyamide film/bonding layer/PE layer

When the pouch 10 is opened from the opening initiation means 60, the breakage proceeds along the first portion 71A, the connecting portion 71D, the second portion 71B, and the third portion 71C of the first perforation line 71. Thereafter, the fracture progresses along the first portion 80A and second portion 80B of the first half-cut line 80, and along the second portion 72B and first portion 72A of the second cut line 72. Thereby, as shown in FIG. 12, the pouch 10 can be opened and the connecting tab 40 can be cut off. Note that when the connecting tab 40 is cut out, cutouts 10H and 10I are formed between the upper edge 10C and the opposing seal portion 31B and between the first side edge 10E and the opposing seal portion 31C, as shown in FIG. .

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

<<<Pouch manufacturing method>>>
Such a pouch 10 can be manufactured as follows. First, the pouring auxiliary member 50 is attached to a portion of the inner surface of the back film 12 that will become the first unsealed portion 32 by heat sealing. Then, the front film 11 and the back film 12 are made to face each other, and the half-folded bottom film 13 is inserted between the front film 11 and the back film 12. At this time, the front film 11, the back film 12, and the bottom film 13 are arranged so that the sealant layers 96 are in contact with each other.

Next, the edges of each film are heat-sealed except for the upper part that serves as the filling opening for the contents, thereby forming the first side seal part 22, the second side seal part 23, the first bottom seal part 24, and the second side seal part 22. A bottom seal portion 25, a spout seal portion 31, and a connecting tab seal portion 41 are formed. This yields a bag-shaped intermediate.

Thereafter, a first perforation line 71, a second perforation line 72, a first half-cut line 80, and a second half-cut line 85 are formed at predetermined positions on this intermediate body. After the first perforation line 80 and the like are formed, the pouch 10 to be produced is punched out along the outer shape of the pouch 10 to obtain the pouch 10 having the main body portion 20 with an open upper portion 20A, the spout portion 30, and the connecting tab 40.

When storing the contents, the contents are filled into the pouch 10 through the opening of the upper part 20A, and then the upper part 20A is heat-sealed along the upper first sealing portion R shown in FIG. Thereby, it is possible to obtain the pouch 10 in which the contents are sealed inside.

If the upper end of the second perforation line is straight, there is a risk that the breakage will progress from the first half-cut line to the first side edge beyond the second perforation line. Here, the present inventors have found that if the upper tip of the second perforation line is placed at a specific position and curved so as to approach the first unsealed part, the fracture progresses beyond the second perforation line. I found that I was able to control my actions even more. According to the present embodiment, the third portion 72C passes through the position P1 of the second unsealed portion 42 closest to the first side edge 10E and extends along the fourth imaginary line IL4 in a direction orthogonal to the first side edge 10E. When pulled, it is located below the fourth imaginary line IL4 and is curved so as to approach the second unsealed portion 42, so it is possible to further suppress the progress of breakage beyond the second perforation line 72. . Thereby, when opening the pouch 10, the entire connecting tab 40 can be cut off with one action.

If the first half-cut line is only the first straight portion, it is easy to apply force, and the force causes the break to progress beyond the second cut line and toward the first side edge. In contrast, according to the present embodiment, the first half-cut line 80 includes, in addition to the linear first portion 80A, a second portion 80B that is curved away from the first side edge 10E. , the break line can be transferred from the second portion 80B to the second perforation line 72. Thereby, when opening the pouch 10, the entire connecting tab 40 can be cut off more reliably with one action.

EXAMPLES In order to explain the present invention in detail, Examples will be given and explained below, but the present invention is not limited to these descriptions.

<Example 1>
In Example 1, a pouch having a spout portion and a connecting tab shown in FIG. 9 was produced. Specifically, a front film, a back film, and a bottom film were prepared. All of these films were composed of packaging material. The packaging material includes a first base layer made of a stretched polyethylene terephthalate film with a thickness of 12 μm, a first bonding layer made of a urethane adhesive, a second base layer made of a stretched nylon film with a thickness of 15 μm, and a urethane adhesive. A second bonding layer consisting of a polyethylene layer having a thickness of 100 μm and a sealant layer consisting of a polyethylene layer having a thickness of 100 μm were laminated in this order.

After preparing these films, first, a pouring auxiliary member was attached by heat sealing to a portion of the inner surface of the back film that would become the first unsealed portion. The pouring auxiliary member had a thin wall portion at the bottom, a side wall portion tapered toward the tip, and a base portion of the side wall portion. Projecting pieces are formed at both ends of the bottom, the distance from one projecting piece to the other is 7.6 mm, the overall height is 2.6 mm, and the length of the bottom in side view is 25 mm. .0 mm, the thickness of the bottom part is 0.6 mm, the thickness of the thin part of the bottom part is 0.4 mm, the protruding length of the protruding piece is 1.0 mm, the thickness of the thickest part of the side wall part is 1.6 mm, The thickness of the top of the side wall was 0.8 mm, and the thickness of the base of the side wall was 1.2 mm.

Thereafter, the front film and the back film were made to face each other, and the half-folded bottom film was inserted between the front film and the back film. At this time, the front film, back film, and bottom film were arranged so that the sealant layers were in contact with each other.

Next, the edges of each film are heat-sealed except for the upper part that will serve as the filling opening for the contents to form a first side seal, a second side seal, a first bottom seal, and a second bottom seal. Then, a first upper seal part, a spout seal part, and a connecting tab seal part were formed, thereby obtaining an intermediate having a first unsealed part and a second unsealed part.

Thereafter, five first half-cut lines were formed using a laser at a portion of the intermediate that would become the spout, using a carbon dioxide laser so as to cross the spout. Furthermore, three second half-cut lines were formed, each touching the two first half-cut lines. The first half-cut line and the second half-cut line penetrated from the first base layer to the second bonding layer, but did not penetrate the sealant layer.

Furthermore, a first perforation line, a second perforation line, and a notch serving as an opening initiation means were formed on the intermediate body. The first perforation line and the like were formed with a knife.

Thereafter, the pouch was punched out along the outer shape of the pouch to be produced to obtain a pouch having an opening at the top and a spout portion shown in FIG. 3.

In the pouch, the first half-cut line was composed of a straight first part and a second part connected to the first part and curved away from the first side edge. . The radius of curvature of the second portion of the first half-cut line was 10 mm. Further, the first portion of the first half-cut line exceeded the second virtual line described in the embodiment. Further, the second portion of the first half-cut line was in contact with the second portion of the second perforation line, but was provided so as not to exceed the second perforation line.

The first perforation line was composed of a first part, a second part, a third part, and a connecting part. The first portion is formed to extend downward from the notch, and the second portion is closer to the first side edge than the first portion and extends upward from the first portion side to the first side edge side. Been formed. The third portion was connected to the second portion of the first perforation line and was curved so as to approach the first unsealed portion. The radius of curvature of the third portion was 1 mm. The connecting portion connected the first portion and the second portion and was curved so as to be convex downward. The radius of curvature of the connecting portion was 3 mm.

The second perforation line was composed of a first part, a second part, a third part, and a connecting part. The first portion of the second perforation line is formed to extend upward from the first side edge side to the second side edge side, and the second portion is located on the upper edge side than the first portion and extends from the first portion side. The first side edge is formed to extend linearly upward toward the edge side. The third portion of the second tear line is the fourth imaginary line that passes through the position closest to the first side edge of the second unsealed portion and extends in a direction perpendicular to the first side edge. It was located below the imaginary line and was curved so as to approach the second unsealed portion. The radius of curvature of the third portion was 1 mm. The third portion of the second perforation line has a distance of 3 mm from the first side edge in the direction perpendicular to the first side edge, and is located at a distance of 3 mm from the second unsealed portion closest to the first side edge. It was located on the side edge. The connecting portion of the second perforation line connected the first portion and the second portion and was curved so as to be convex toward the second side edge. The radius of curvature of the connecting portion was 3 mm.

In the produced pouch, the width W1 was 106 mm, and the height H was 205 mm. Further, the width W2 of the gusset folded portion was 35 mm, and the first side sealed portion and the second unsealed width W3 were each 5 mm. Note that the dimensions of H, W1 to W3, etc. are as shown in FIG.

<Example 2>
In the pouch according to Example 2, the pouch was prepared in the same manner as in Example 1, except that the distance between the first side edge and the third portion of the second tear line in the direction perpendicular to the first side edge was 5 mm. I got it.

<Comparative example 1>
In the pouch according to Comparative Example 1, a pouch was obtained in the same manner as in Example 1 except that the third portion of the second perforation line was made straight. The third portion of the second perforation line extended in the direction in which the second portion of the second perforation line extended.

<Opening evaluation>
In the pouches according to Example 1 and Comparative Example 1, it was evaluated whether all the connecting tabs could be cut off when the pouches were opened. First, ten pouches each according to Example 1 and Comparative Example 1 were prepared. Then, each pouch was opened from the notch and the connecting tab was cut out. The evaluation results were as follows.
○: In 8 to 10 out of 10 bags, the entire connecting tab could be cut off with one action.
Δ: In 3 to 7 out of 10 bags, the entire connecting tab could be cut off with one action.
×: In 1 to 2 out of 10 bags, the entire connecting tab could be cut off with one action, or the entire connecting tab could not be cut off with one action in none of the bags.

The evaluation results are shown in Table 1 below.

As shown in Table 1, in the pouch according to Comparative Example 1, the third part of the second tear line was straight, so when the pouch was opened, a part of the connecting tab remained, and one action I was almost unable to cut out the entire connecting tab. On the other hand, in the pouches according to Examples 1 and 2, the third part of the second perforation line is located below the fourth imaginary line and is curved so as to approach the second unsealed part. When the pouches were opened, the entire connecting tab was often cut off. As a result, it was confirmed that the spout part could be opened and the entire connecting tab could be cut off with one action.

10...Pouch 10A...Surface 10B...Back surface 11...Front surface film 12...Back surface film 13...Bottom film 20...Body portion 30...Spout section 31...Spout seal section 32...First unsealed section 40...Connection tab 50... Pouring auxiliary member 60... Opening initiation means 70... Perforation line 71... First perforation line 72... Second perforation line 71A, 72A... First portion 71B, 72B... Second portion 71C, 72C... Third portion 71D, 72D...Connecting portion 80...First half cut line 80A...First portion 80B...Second portion 90, 100...Packaging material 91...First base layer 94...Second base layer 96...Sealant layer

Claims (6)

A pouch comprising a front film and a back film facing the front film,
having an upper edge, a lower edge, and first and second side edges extending between the upper edge and the lower edge,
comprising a main body part, a spout part integrated with the main body part, and a connecting tab provided continuously to the spout part,
The spout portion is provided at a corner formed by the upper edge and the first side edge,
The spout portion includes a first unsealed portion that serves as a flow path when pouring out the contents;
the connecting tab includes a second unsealed portion communicating with the first unsealed portion;
An opening initiation means is provided at the top of the pouch,
Three or more first half-cut lines are provided so as to cross the spout portion,
a tear line is provided through the pouch for cutting the connecting tab;
The perforation line includes a first perforation line located above the first unsealed part and a second perforation line located below the first unsealed part,
The first perforation line includes a first portion extending downward from the unsealing initiation means, and is located closer to the first side edge than the first portion, and extends upward from the first portion side to the first side edge side. a second portion extending toward the second portion, and a connecting portion connecting the first portion and the second portion,
The connecting portion of the first perforation line is curved so as to be convex downward,
The second perforation line includes a first portion extending upward from the first side edge side to the second side edge side, and a first portion located closer to the upper edge side than the first portion, and extending from the first portion side to the first portion. including a second portion extending upward on the side edge side, a third portion connected to the second portion, and a connecting portion connecting the first portion and the second portion,
The connecting portion of the second perforation line is curved so as to be convex toward the second side edge,
When an imaginary line is drawn passing through a position closest to the first side edge of the second unsealed portion and extending in a direction perpendicular to the first side edge, the third portion of the second perforation line located below the line and curved so as to approach the second unsealed part,
The third portion of the second perforation line has a tip facing the upper edge,
The pouch, wherein the third portion of the second perforation line satisfies at least one of the following requirements (1) and (2).
Requirement (1) The distance from the first side edge in the direction perpendicular to the first side edge is 3 mm or more.
Requirement (2) The second unsealed portion is located closer to the second side edge than the position closest to the first side edge. Each of the first half cut lines and the second cut line touch each other, and the shortest distance from the contact point of each of the first half cut lines and the second cut line to the third portion of the second cut line is 0. 5. The pouch of claim 1, wherein the pouch is .5 mm or less. The pouch according to claim 1 or 2, wherein the third portion of the second perforation line has a radius of curvature of 0.5 mm or more and 2 mm or less. The first tear line includes a third portion connected to the second portion of the first tear line, and the third portion of the first tear line approaches the first unsealed portion. 4. A pouch according to any one of claims 1 to 3, which is curved. The pouch according to claim 4, wherein the third portion of the first perforation line has a radius of curvature of 0.5 mm or more and 2 mm or less. The pouch according to any one of claims 1 to 5, further comprising a pouring auxiliary member disposed at a position between the front film and the back film in the first unsealed portion.

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