JP2018052591A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag, in which a refilling work to other container can be easily and stably performed, at an inexpensive price.SOLUTION: A packaging bag having a rear side shank, a front side shank, and a bottom gusset part, in which the front side shank is configured from a front lower side shank and a front upper side shank, and both of left and right sides of the shank and an upper part of the packaging bag are sealed. The front lower side shank and the front upper side shank are sealed above a packaging bag center where sealant layers are so overlapped as to face each other and side seal parts on both of left and right sides and a pouring mouth are formed, so forms the pouring mouth as to be capable of expanded from the front side shank thereby constituting a branch, and can be overlapped on the front side shank. A notch is provided on both ends at a position over a valley fold line, and the sealant layer of the rear side shank and the sealant layer of the front upper side shank or the front lower side shank, which can be brought into contact with each other when valley folding by the notch, are sealed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag. In particular, the present invention relates to a packaging bag having a pour spout, which is made of a plastic film as a base material and can store liquids, powders, granules and the like as contents.

  Packaging bags that can store liquids, powders, granules, etc. are widely used as single-layered or laminated bodies based on plastic films, and various forms have a wide range of uses. It is indispensable for modern life.

  For example, when it is also used as a liquid container, it is widely used in the food field such as beverages and retort foods, and in the daily necessities and toiletries field, various products can be found in the shelves of supermarkets, drug stores, and convenience stores. It is crowded. In this way, not only in the food field, various applications are developed as liquid containers.

  Advantages of packaging bags based on plastic film are that they are less expensive than cans, bottles, and other containers, can be handled with detailed material design depending on the required quality, or before filling contents, in distribution and storage Is also light and space-saving. The pouch is environmentally friendly from the perspective of reducing waste.

  In addition, high-definition printing on the layer visible from the surface can improve the image of the product and display necessary information about the contents. Bar code printing is used for product distribution and marketing. It is also a source of information.

  Among packaging bags made of plastic film as a base material, those having self-supporting properties have been commercialized and are generally called standing pouches. By providing independence, the convenience of taking out the contents has been increased.

  As another form of the liquid container, there are a glass bottle and a plastic bottle, which are generally used in the toiletry field such as a detergent and a shampoo. However, with the recent increase in awareness of environmental problems, problems have been raised regarding the disposal and incineration of traces from which the contents have been taken out.

  Correspondingly, there is an active movement to reduce the amount of glass bottles and plastic bottles to be discarded and incinerated by using packaging bags made of plastic film as a base material for refilling containers. It has begun to penetrate.

  However, for example, a refill packaging bag such as a shampoo is an example of a packaging bag having a plastic film as a base material, but an opening for pouring is provided at one corner of a rectangular packaging bag. There was a risk of clogging the spout.

  Alternatively, when trying to pour out to the end, the packaging bag is rolled up obliquely from the bottom, which makes it difficult to work and the remaining liquid tends to remain. In particular, since the repacking bag is held at an angle close to the upside down, the contents have spilled out of the refill destination container or contaminated fingers.

  In order to avoid this, Patent Document 1 proposes to form a spout portion by attaching a spout of another member, but in this case, a process of preparing or attaching a separate member is also included. The problem is that it is necessary and has disadvantages in terms of cost and logistics.

  Further, Patent Document 2, Patent Document 3, and Patent Document 4 propose that rib processing is performed on the spout portion for the purpose of ensuring the opening state of the spout. At times, if the air does not smoothly enter the packaging bag, the opening state may not be maintained and the packaging bag may be blocked.

  This is a state in which the films in the spout portion are in close contact with each other and the opening is closed. Depending on the contents, the rigidity of the film may be insufficient and the rib effect may not be exhibited. When the viscosity of the contents is high, this is remarkable and the workability is not necessarily good, and a sufficient effect cannot be expected.

JP-A-5-132069 Japanese Patent No. 4617866 Japanese Patent No. 4826096 Japanese Patent No. 4816322

  SUMMARY OF THE INVENTION The present invention has been made in view of such a situation, and it is an object of the present invention to provide a packaging bag that can easily and stably perform refilling operations on other containers in the packaging bag. Is to be provided at a low cost.

As means for solving the above problems, the invention according to claim 1
A packaging bag comprising a laminate provided with at least a base material and an innermost sealant layer,
Having a rear trunk, a front trunk, and a bottom gusset,
The front trunk is composed of a front lower trunk and a front upper trunk,
The left and right sides of the trunk and the top of the packaging bag are sealed,
The front lower body part and the front upper body part are above the center of the packaging bag, the sealant layers face each other and overlap, and form a side seal part on both the left and right sides and a spout part, which are sealed, and from the front body part A spout part is formed so that it can be overhanged to form a branch,
The branch can be folded over the valley line at the boundary of the branch of the front body, and overlapped with the front body,
A notch is provided at a position across the valley fold line at both ends of the front lower trunk or the front upper trunk, and the rear trunk can be contacted by the notch when the valley is folded. And the sealant layers of the front upper body part or the front lower body part are sealed,
The bottom gusset portion is a packaging bag characterized in that the bottom gusset portion is sealed with the peripheral portions of the rear barrel portion and the front lower barrel portion.

  The invention according to claim 2 is characterized in that the notch has a size extending beyond the seal portions on the left and right sides of the body portion to the inside of the front body portion. It is a packaging bag.

  The invention according to claim 3 is characterized in that the shape of the cutout is one of a rectangle, a circle, an ellipse, a polygon, or a combination thereof. The packaging bag according to claim 1 or claim 2.

  The invention according to claim 4 is the packaging bag according to any one of claims 1 to 3, wherein the spout portion is provided with an easy-open mechanism.

  In addition, the invention according to claim 5 is characterized in that the spout portion is provided with a mountain fold line or a valley fold line toward the inside of the packaging bag. It is a packaging bag of description.

  The invention according to claim 6 is the packaging bag according to claim 5, wherein the mountain fold line or the valley fold line is provided by any one of embossing, half cut, and seal.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide the packaging bag which can perform the refilling operation | work to another container easily and stably in a packaging bag at low cost.

  In particular, according to the second aspect of the present invention, when the contents are filled in the packaging bag, the branch having the spout can be separated from the front body portion and the spout can be made substantially horizontal. Therefore, it is possible to provide a packaging bag that can be easily and stably refilled into another container at a low cost.

  In particular, according to the invention described in claim 3, it is possible to provide a packaging bag that can be refilled into another container easily and stably in a packaging bag at a low cost and with a degree of design freedom. Is possible.

  In particular, according to the invention described in claim 4, in the packaging bag, it is possible to provide a packaging bag that can be easily and stably refilled into another container and can be opened easily and at a lower cost. It is.

  In particular, according to the invention described in claim 5, it is possible to provide a packaging bag that can be refilled into another container easily and more stably at a lower cost.

  In particular, according to the invention described in claim 6, it is possible to provide a packaging bag that can be refilled into another container easily and more stably at a lower cost.

FIG. 1 is a schematic perspective view for explaining one embodiment of a packaging bag according to the present invention. FIG. 2 is a partial cross-sectional schematic diagram of a straight line portion connecting points A and B shown in FIG. 1 with respect to the branch of the packaging bag according to the present invention. FIG. 3 is a partial cross-sectional schematic view for explaining an embodiment different from FIG. 2 of the straight line portion connecting the points A and B shown in FIG. 1 with respect to the branch of the packaging bag according to the present invention. FIG. 4 is a schematic plan view for explaining one embodiment of the packaging bag according to the present invention. FIG. 5 is a schematic plan view for explaining another embodiment of the packaging bag according to the present invention. FIG. 6 is a schematic plan view for explaining still another embodiment of the packaging bag according to the present invention.

  Hereinafter, the present invention will be described in more detail with reference to FIGS. However, the present invention is not limited to the examples shown here.

  FIG. 1 is a schematic perspective view for explaining one embodiment of a packaging bag according to the present invention.

  The packaging bag (100) by this invention consists of a laminated body which provided the sealant layer in the at least one surface by using a plastic film as a base material. A packaging bag is comprised from parts of a rear side trunk | drum (9), a front side trunk | drum, and a bottom part (8), and a packaging bag (100) inner side is a sealant layer.

  Moreover, the packaging bag (100) can store the liquid contents, and has a self-supporting property by spreading the bottom (8) parts by a gusset method. In the configuration, the bottom part (8), the rear body part (9) and the front lower body part (7) are bonded to each other by heat-sealing the peripheral part. In the example shown in FIG. 1, the packaging bag is rectangular, but the packaging bag is not limited to a rectangular shape, and may be, for example, a shape in which part or all of both sides are curved in an arc shape.

  The front body part of the packaging bag (100) is composed of a front lower body part (7) and a front upper body part (6), and the seal part (1) on the left and right sides of the body part and the packaging bag (100). The upper part is closed with an upper heat seal (2).

  Although not shown in FIG. 1, it is also possible to fold a single laminated body so that the front lower body part (7) and the front upper body part (6) are constituted by one sheet.

  The front lower body part (7) and the front upper body part (6) are higher than the central part of the packaging bag (100) and overlap so that the sealant layers face each other. 4), and heat-sealed so as to form the spout part (13) and bonded, projecting from the front body part to form the spout part (13) to constitute the branch (10).

  The packaging bag (100) according to the present invention can fold the branch (10) at the valley fold line (15) before filling the contents, and can overlap the front body part flatly. In the example shown in FIG. 1, the branch (10) is the one folded downward by a valley fold line and filled with the contents (11).

  By filling the contents, the packaging bag has a bulge and the bottom expands, enabling self-supporting. In addition, at the upper part of the packaging bag, the valley fold line (15) at the boundary of the branch (10) of the front body part is folded, and at both ends of the front lower body part (7) or the front upper body part (6), A notch is provided at a position across the broken line (15).

  The point seal (5) is obtained by heat-sealing the notch, and details of the point seal (5) will be described later with reference to FIGS.

  In the present invention, the effect of providing the point seal (5) is that when the packaging bag (100) is filled with the contents (11), the packaging bag (100) expands to increase its volume, and at the same time, Since the end of the fold line (15) is fixed with a point seal (5) with a width, the branch (10) has an effect of lifting from the front body at an angle.

  Moreover, the spout part (13) is provided in the branch (10), for example, it is possible to open a packaging bag (100) by tearing the opening line (14).

  In this state, by holding the center of the body of the packaging bag with fingers and applying pressure, the liquid level (12) of the contents rises, and finally enters the branch (10) and enters the spout (13). From the opening, the contents (11) are poured out.

  Since this pour is poured out in the direction toward the front surface of the packaging bag (100) because the branch (10) is lifted at an angle, for example, the contents (11) are transferred to another container. In such cases, there is no need to lift the packaging bag (100) upside down, which is convenient.

  On the other hand, the bottom (8) has a bottom gusset member which is gusseted so that the width of the bottom is expanded by the contents (11) and can be self-supporting. ) And the bottom heat seal (3).

  FIG. 2 is a partial cross-sectional schematic view of a straight line portion connecting points A and B shown in FIG. 1 with respect to the branch (10) of the packaging bag (100) according to the present invention. That is, the cross-sectional view shown in FIG. 2 shows a state before point sealing, where the branch (10) is folded at the valley fold line (15), the notch (20) at the end of the valley fold line and the valley fold line (15), It is a partial cross-sectional view for explaining the relationship between the point seal (5) and the branch (10). In the figure, the right direction is the upper side of the packaging bag, and the upper direction of the figure is the front side of the packaging bag.

  The points A and B are both on the right side of the seal part (1) on the left and right sides of the body part as viewed in the figure. Therefore, the sealant layer of the rear body part (9) and the sealant layers of the front upper body part (6) and the front lower body part (7) are heat sealed and bonded. Yes.

  Further, with the valley fold line (15) as a branch point, the sealant layers of the front upper body part (6) and the folded back lower body part (7) are opposed to each other and heat-sealed, A side seal portion (4) is formed.

  In this invention, the notch (20) is provided in the position which straddles the valley fold line (15) in the both ends of a front lower side trunk | drum (7) or a front upper side trunk | drum (6). In the example shown in FIG. 2, the notch (20) is provided across the valley fold line (15) of the front lower trunk (7), and is indicated by a dotted line as the notch (20) in the figure. In this state, the notched portion is removed.

  Therefore, in the notch (20), the sealant layer of the rear barrel (9) and the sealant layer of the front upper barrel (6) can be opposed to each other. This portion can be bonded as a point seal (5) by performing a heat seal (16) indicated by an arrow.

  By providing the point seal (5), the end of the branch (10) of the packaging bag (100) according to the present invention can be fixed. Further, the notch (5) can be sized so as to extend beyond the width of the seal part (1) on both the left and right sides of the trunk part to the inside of the front trunk part of the packaging bag (100). Moreover, it can be set as the magnitude | size which extends to a packaging bag (100) front side trunk | drum inner side.

  Since the end of the branch (10) is fixed by the point seal (5), when the contents (11) are filled in the packaging bag (100), the packaging bag (100) expands to increase its volume. At the same time, since the end of the valley fold line (15) is fixed with a width by the point seal (5), the branch (10) is lifted at an angle from the front body.

  This is because the packaging bag (100) swells due to the filling of the contents (11), the front body part and the rear body part (9) are pulled back and forth, and are folded flat. The branch (10) also has an angle and is three-dimensional, and the valley fold line (15) also has a width at the point seal (5) and is fixed at the end so that it is curved when viewed from the front. The valley folds up.

  This is as schematically shown in FIG. When the branch (10) becomes three-dimensional, the air or contents inside the packaging bag enter the branch and make the branch (10) three-dimensional.

  Moreover, the spout part (13) is provided in the branch (10), for example, it is possible to open a packaging bag (100) by tearing the opening line (14).

  In this state, by holding the center of the body of the packaging bag with fingers and applying pressure, the liquid level (12) of the contents rises, and finally enters the branch (10) and enters the spout (13). From the opening, the contents (11) are poured out.

  Since this pour is poured out in the direction toward the front surface of the packaging bag (100) because the branch (10) is lifted at an angle, for example, the contents (11) are transferred to another container. In such cases, there is no need to lift the packaging bag (100) upside down, which is convenient.

  FIG. 3 is a partial cross-sectional schematic view of a straight line portion connecting points A and B shown in FIG. 1 with respect to the branch (10) of the packaging bag (100) according to the present invention. That is, the cross-sectional view shown in FIG. 3 is in a state before performing point sealing, in which the branch (10) is folded at the valley fold line (15), the notch (20) at the end of the valley fold line and the valley fold line (15), It is a partial cross-sectional view for explaining the relationship between the point seal (5) and the branch (10). In the figure, the right direction is the upper side of the packaging bag, and the upper direction of the figure is the front side of the packaging bag.

  The points A and B are both on the right side of the seal part (1) on the left and right sides of the body part as viewed in the figure. Therefore, the sealant layer of the rear body part (9) and the sealant layers of the front upper body part (6) and the front lower body part (7) are heat sealed and bonded. Yes.

  Further, with the valley fold line (15) as a branching point, the front upper body part (6) and the sealant layers of the front lower body part (7) folded back in the upper direction of the packaging bag are opposed to each other and heat sealed. The side seal portions (4) on both the left and right sides of the branch are formed.

  In this invention, the notch (20) is provided in the position which straddles the valley fold line (15) in the both ends of a front lower side trunk | drum (7) or a front upper side trunk | drum (6). In the example shown in FIG. 3, the notch (20) is provided across the valley fold line (15) of the front lower body part (7), and is indicated by the notch (20) in the figure. The missing part is removed.

  Therefore, in the notch (20), the sealant layer of the rear barrel (9) and the sealant layer of the front upper barrel (6) can be opposed to each other. This portion can be bonded as a point seal (5) by performing a heat seal (16) indicated by an arrow.

By providing the point seal (5), the branch of the packaging bag (100) according to the present invention (
The end of 10) can be fixed. Further, the notch (5) can be sized so as to extend beyond the width of the seal part (1) on both the left and right sides of the body part and to the inside of the front body part of the packaging bag, so that the point seal (5) is also packaged. The bag (100) can have a size that extends to the inside of the front trunk.

  By providing the point seal (5), the end of the branch (10) of the packaging bag (100) according to the present invention can be fixed. Further, the notch (5) can be sized so as to extend beyond the width of the seal part (1) on both the left and right sides of the body part and to the inside of the front body part of the packaging bag, so that the point seal (5) is also packaged. The bag (100) can have a size that extends to the inside of the front trunk.

  Since the end of the branch (10) is fixed by the point seal (5), when the contents (11) are filled in the packaging bag (100), the packaging bag (100) expands to increase its volume. At the same time, since the end of the valley fold line (15) is fixed with a width by the point seal (5), the branch (10) is lifted at an angle from the front body.

  This is because the packaging bag (100) swells due to the filling of the contents (11), the front body part and the rear body part (9) are pulled back and forth, and are folded flat. The branch (10) also has an angle and is three-dimensional, and the valley fold line (15) also has a width at the point seal (5) and is fixed at the end so that it is curved when viewed from the front. The valley folds up.

  This is as schematically shown in FIG. When the branch (10) becomes three-dimensional, the air or the contents inside the packaging bag can enter the branch and make the branch (10) three-dimensional.

  Moreover, the spout part (13) is provided in the branch (10), for example, it is possible to open a packaging bag (100) by tearing the opening line (14).

  In this state, by holding the center of the body of the packaging bag with fingers and applying pressure, the liquid level (12) of the contents rises, and finally enters the branch (10) and enters the spout (13). From the opening, the contents (11) are poured out.

  Since this pour is poured out in the direction toward the front surface of the packaging bag (100) because the branch (10) is lifted at an angle, for example, the contents (11) are transferred to another container. In such cases, there is no need to lift the packaging bag (100) upside down, which is convenient.

  The shape of the notch (20) can be one of a rectangle, a circle, an ellipse, and a polygon, or a combination of a plurality of them, and is not limited in shape. The folded branch (10) becomes three-dimensional with an angle by filling the contents (11), and the end of the valley fold line (15) is also fixed with a point seal (5) with a width. Therefore, as long as the valley fold rises in a curved state when viewed from the front, a free shape may be taken.

  FIG. 4 is a schematic plan view for explaining one embodiment of the packaging bag according to the present invention.

As shown here, the packaging bag according to the present invention can be folded flat when the contents are not filled. The branch (10) is folded toward the lower side of the front body part with the valley fold line (15) as a boundary. The bottom (8) is also folded by heat sealing the bottom part.

  Moreover, the opening part (14) which can open a pouring spout can be provided in a spout part, and the easy opening mechanism which can be opened easily using a finger | toe can be provided. The easy-open line can be constituted by, for example, a notch (17) that is a trigger for opening, or a half-cut line that follows.

  The packaging bag according to the present invention is composed of a laminate having a plastic film as a base material and a sealant layer on one surface. The elements constituting the laminate will be described below.

(Plastic film)
A plastic film is a film made of a polymer resin composition. For example, polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide (nylon-6, nylon-66, etc.), polyimide Etc. can be used, and is appropriately selected according to the application. In particular, when polypropylene or polyethylene terephthalate is used as a base film, it is more preferable in terms of film strength and price.

(Sealant layer)
As a material for the sealant layer, a polyolefin resin is generally used among thermoplastic resins. Specifically, a low density polyethylene resin (LDPE), a medium density polyethylene resin (MDPE), and a linear low density polyethylene resin. (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α olefin copolymer, ethylene-methacrylic acid resin copolymer and other ethylene resins, polyethylene and polybutene blend resins, and homopolypropylene resins Polypropylene resins such as (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α olefin copolymer can be used.

  FIG. 5 is a schematic plan view for explaining another embodiment of the packaging bag according to the present invention.

  The example shown here is an example characterized by providing a mountain fold line or a valley fold line (18) from the spout toward the packaging bag side at the spout portion. The mountain fold line or the valley fold line (18) can increase the rigidity of the laminate constituting the branch (10) in the direction perpendicular to the mountain fold line or the valley fold line (18).

  That is, in the pouring part (13) of the packaging bag (100) that has been opened and the opening appears, when the liquid of the content (11) is poured out, it functions as a rib to prevent the opening from being blocked. It is possible.

  FIG. 6 is a schematic plan view for explaining still another embodiment of the packaging bag according to the present invention.

  The example shown here is an example in which the branch (10) is folded up above the packaging bag (100) with the valley fold line (15) as a boundary. In this case, it is an example of the point seal (5) shown in FIG. Moreover, the example shown here is an example characterized by providing a mountain fold line or a valley fold line (18) from the spout toward the packaging bag side in the spout portion.

The mountain fold line or the valley fold line (18) can increase the rigidity of the laminate constituting the branch (10) in the direction perpendicular to the mountain fold line or the valley fold line (18). That is, in the pouring part (13) of the packaging bag (100) that has been opened and the opening appears, when the liquid of the content (11) is poured out, it functions as a rib to prevent the opening from being blocked. It is possible.

  The mountain fold line or the valley fold line (18) toward the inner side of the packaging bag can be provided by any one of embossing, half-cutting, and sealing.

  Moreover, in this invention, it is not necessary to attach another member to a spout part, and it is a packaging bag excellent also in terms of cost. Moreover, the opening part (14) which can open a spout can be provided in a spout part. The opening line (14) can be provided with an easy opening mechanism that can be easily opened using fingers. The easy-opening mechanism can be constituted by, for example, a notch (17) that causes opening, or a half-cut line of a laminated body of packaging bags that follows.

  That is, by providing an easy opening mechanism, the opening operation can be performed more easily and stably. For example, the contents can be transferred more easily and stably.

  Thus, according to the present invention, it is possible to provide a packaging bag that can be refilled into another container easily and stably at a low cost.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the examples shown here. The invention is limited only by the following claims.

<Example 1>
The shape is the packaging bag according to the present invention shown in FIG.
The material composition is as follows.
Body member: stretched polyamide film (thickness 15 μm) / deposited polyethylene terephthalate film (thickness 12 μm) / linear low density polyethylene resin (thickness 100 μm).
Bottom member: stretched polyamide film (thickness 15 μm) / linear low density polyethylene resin (thickness 100 μm).
The opening line (14) was a half-cut line by laser processing.
The contents were filled with 340 ml of household shampoo and sealed with an upper heat seal (2).

<Comparative Example 1>
Compared to Example 1, the only difference is that there is no point seal.

<Comparative example 2>
Compared with Example 1, there are two points of difference, that is, there is no point seal, and a convex mountain fold line or valley fold line is provided as a rib at the center of the branch spout.

The following evaluation items were set for each specimen to be refilled.
The remaining amount refill time evaluation for the presence or absence of liquid spillage was performed at n = 5.

  The evaluation results are shown in Table 1.

As is apparent from the results shown in the table, it was verified that the packaging bag of Example 1 according to the present invention was excellent in all items of presence / absence of liquid spillage, remaining amount, and refill time.
That is, since the spout was three-dimensional after opening, the workability was excellent and the refilling time was the shortest. Moreover, since the spout was not clogged during the operation, liquid spillage did not occur and the remaining amount was small.

  In the packaging bag of Comparative Example 1, the opening was not three-dimensionally held at the branch spout, and the occurrence of liquid spillage due to the refilling operation while being in close contact was observed. As a result, the work became unstable and the refilling time became longer.

  In the packaging bag of Comparative Example 2, similar to Comparative Example 1, the opening was not three-dimensionally held at the branch spout, and liquid spillage was observed due to the refilling operation with close contact.

  The difficulty of breaking the spout was better than that of Comparative Example 1, but it took time to open the opening after opening, resulting in a longer refilling period than that of Example 1. Further, the remaining amount of the liquid was accumulated by providing convex mountain fold lines or valley fold lines as ribs, resulting in an increase in the remaining amount.

  As described above, according to the present invention, it is possible to verify that it is possible to provide a packaging bag that can be refilled into another container easily and stably at a low cost. did it.

DESCRIPTION OF SYMBOLS 1 ... The seal | sticker part 2 on both right and left sides of a trunk | drum 2 ... Upper heat seal 3 ... Bottom heat seal 4 ... Side seal part 5 on both right and left sides of a branch ... Point seal 6 ... Front upper trunk | drum 7 ... Front lower side body part 8 ... Bottom part 9 ... Rectangular rear body part 10 ... Branch 11 ... Contents 12 ... Liquid level 13 of contents ... Spout part 14 ... opening line 15 ... valley fold line 16 ... heat seal 17 ... notch 18 ... mountain fold line or valley fold line 100 ... packaging bag

Claims (6)

A packaging bag comprising a laminate provided with at least a base material and an innermost sealant layer,
Having a rear trunk, a front trunk, and a bottom gusset,
The front trunk is composed of a front lower trunk and a front upper trunk,
The left and right sides of the trunk and the top of the packaging bag are sealed,
The front lower body part and the front upper body part are above the center of the packaging bag, the sealant layers face each other and overlap, and form a side seal part on both the left and right sides and a spout part, which are sealed, and from the front body part A spout part is formed so that it can be overhanged to form a branch,
The branch can be folded over the valley line at the boundary of the branch of the front body, and overlapped with the front body,
A notch is provided at a position across the valley fold line at both ends of the front lower trunk or the front upper trunk, and the rear trunk can be contacted by the notch when the valley is folded. And the sealant layers of the front upper body part or the front lower body part are sealed,
The bottom gusset part is sealed with the peripheral part of a rear side trunk | drum and a front lower side trunk | drum, The packaging bag characterized by the above-mentioned.   2. The packaging bag according to claim 1, wherein the notch has a size that extends beyond the seal portions on the left and right sides of the body portion to the inside of the front body portion.   3. The packaging bag according to claim 1, wherein the shape of the notch is one of a rectangle, a circle, an ellipse, and a polygon, or a combination thereof.   The packaging bag according to any one of claims 1 to 3, wherein the spout portion includes an easy-open mechanism.   The packaging bag according to any one of claims 1 to 4, wherein the spout portion is provided with a mountain fold line or a valley fold line toward the inside of the packaging bag.   The packaging bag according to claim 5, wherein the mountain fold line or the valley fold line is provided by any one of embossing, half-cutting, and sealing.