JP2014009018A - Extraction unit and packing bag with fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing bag with a fastener capable of maintaining an opening state even if a fastener part is not continuously gripped by hand, and capable of always maintaining an excellent sealing state even if the fastener is repeatedly opened and closed.SOLUTION: The packing bag with the fastener is composed of a bag body 1 and an extraction unit 2 heat-sealed to one upper corner part of the bag body 1 integrally with the bag body 1, having the fastener 3, extracting the content stored in the bag body 1 and sealing the bag body 1, and the extraction unit 2 is composed of a pair of opposed wall surface parts 8 and 9, and the fastener 3 is composed of a male type fastener part formed on an inner surface of one wall surface part 8 and a female type fastener part fitted with this and formed on an inner surface of the other wall surface part 9, and the fastener 3 is formed in a straight line shape in a state of closing the fastener 3, and is formed so that the male type fastener part and the female type fastener part can mutually maintain an arc shape without adding external force to the fastener 3 in a state of opening the fastener 3.

Description

  INDUSTRIAL APPLICABILITY The present invention provides a dispensing unit and a packaging bag with a fastener, and in particular, can maintain an opened state without being held by hand, and can maintain a good sealed state at all times even when repeatedly opened and closed. The present invention relates to a packaging bag pouring unit and a zippered packaging bag equipped with the pouring unit.

  Conventionally, a packaging bag with a fastener comprising a bag body and a dispensing unit attached to a corner portion of the bag body is known. One example is disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2005-350104). Hereinafter, this packaging bag with a fastener is referred to as a conventional packaging bag C, and will be described with reference to the drawings.

  13 is a front view showing a conventional packaging bag C, FIG. 14 is a front view showing a dispensing unit, FIG. 15 is a perspective view showing the dispensing unit, and FIG. 16 is a cross-sectional view taken along line AA in FIG. It is.

  As shown in FIG. 13, the conventional packaging bag C is composed of a bag body 21 and a dispensing unit 22. The dispensing unit 22 is heat-sealed integrally with the bag body 21 in an opening 21a formed at one upper corner of the bag body 21, and has a function of dispensing contents and sealing the bag body 21. Yes.

  The bag body 21 is composed of a pair of opposed flat portions 23 and a bottom portion 24. The side edges 23 a of the flat portion 23 are heat-sealed to form a cylinder 25. The bottom surface portion 24 closes the lower portion of the cylindrical body 25. The bottom surface portion 24 can be folded into an inverted V shape in the cylindrical body 25 along a fold line 26 formed at the center thereof. The lower edge 25a of the cylindrical body 25 and the peripheral edge 24a of the bottom surface portion 24 are heat-sealed, and when the bottom surface portion 24 is widened, the bottom surface portion 24 has a substantially elliptical shape.

  The dispensing unit 22 includes a pair of opposing wall surface portions 27. As shown in FIG. 14, each of the pair of wall surface portions 27 has a shape in which two substantially isosceles triangles are connected, and orthogonal peripheral edges are heat-sealed to form a seal portion 28. In each of the pair of wall surfaces 27, a fold line 29 is formed at a connecting portion of two substantially isosceles triangles. The inner surface of the wall surface portion 27 that forms the fold line 29 is formed with a concave groove over the entire length so that the wall surface portion 27 can be easily bent outward. By forming the fold line 29 on the inner surface of the wall portion 27, the pouring unit 22 spreads in a pyramid shape as shown in FIG. 15, and a rectangular opening 22a is formed at the bottom of the pyramid. The edge of the opening 22a and the opening 21a of the bag body 21 are heat-sealed to each other.

  In the wall surface portion 27 between the top portion (P) of the dispensing unit 22 and the opening portion 22a, a fastener 30 is formed between the orthogonal seal portions 28 so as to be bent in a V shape around the folding line 29. Yes. The fastener 30 and the edge of the opening 22a are parallel to each other. As shown in FIG. 16, the fastener 30 includes a male fastener portion 31 formed on one inner surface of the pair of wall surface portions 27 and a male fastener portion 31 formed on the other inner surface of the pair of wall surface portions 27. And a female fastener portion 32 to be fitted.

  On the wall surface portion 27 between the top portion (P) of the dispensing unit 22 and the fastener 30, an opening portion 33 including the seal portion 28 is formed at right angles to the fold line 29. The bag body 21 is opened by tearing the wall portion 27 along the opening portion 33. A cutout 34 is formed in at least one end portion (in this example, only the upper end) of the opening portion 33 so that the wall portion 27 can be easily cut.

  An opening 35 is formed in the wall surface portion 27 between the top portion (P) of the dispensing unit 22 and the opening portion 33. The opening 35 is used when the dispensing unit 22 is picked up by an arm of a supply robot (both not shown) in the process of heat-sealing the dispensing unit 22 to the bag body 21 when manufacturing the packaging bag. In addition, the dispensing unit 22 is held in a predetermined direction.

  According to the conventional packaging bag C, the packaging bag can be opened by opening the fastener 30 after tearing the wall surface portion 27 of the dispensing unit 22 along the opening portion 33. If the fastener 30 is closed after the content is poured out, the opening 21a of the bag body 21 is closed and the bag body 21 can be sealed.

  In Patent Document 2 (International Publication No. 2007/108251), as shown in FIGS. 17 and 18, the wall surface portion 27 is formed on the outer surface of the wall surface portion 27 corresponding to each fastener 30 of the pair of wall surface portions 27. A pair of knobs 36 projecting from the zipper 36 is formed, and at the time of opening, the pair of knobs 36 are picked by hand and pulled in opposite directions to each other, thereby making the opening operation easy (hereinafter referred to as a conventional packaging bag D). ) Is disclosed. The operation of opening and opening the fastener 30 can be performed more easily by forming the knob 36 on the wall surface portion 27 of the dispensing unit 22 as in the conventional packaging bag D.

  As described above, according to the conventional packaging bags C and D, it is necessary to maintain the unsealed state when the contents are poured out. For this purpose, as shown in FIG. 11 (a), it is necessary to keep the fastener 30 in an open state by holding the fastener 30 portion by hand. For this reason, the contents can be poured out relatively easily when the contents are lightweight sprinkles or small packaging bags for confectionery, but the contents are heavy like powders. In this case, or in the case of a large packaging bag for storing a bulky content, as shown in the figure, while holding the unsealed state by holding the fastener 30 part with one hand, If the bag main body 21 is not supported by hand, the bag main body 21 hangs down due to the weight of the contents and breaks, which may make it difficult to pour out the contents.

  Since the fastener 30 is formed to be bent in a V shape around the fold line 29, when the fastener 30 is repeatedly opened and closed, the bent portion (O) of the fastener 30 (see FIG. 14) is deformed, The male fastener portion 31 and the female fastener portion 32 do not fit well, and there is a possibility that the problem of deterioration in sealing performance of the bag body 21 due to local deformation of the fastener 30 may occur.

  Means for solving the problem of the former problem of the above-mentioned two problems, in that it was necessary to continue to hold the fastener 30 portion of the bag body 21 by hand in order to maintain the unsealed state when the contents were poured out. Patent Document 1 describes that by forming the dispensing unit 22 from a shape memory resin, it is possible to maintain an unsealed state without continuing to hold the fastener 30 portion by hand. .

JP-A-2005-350104 International Publication No. 2007/108251

  According to the conventional packaging bag C, it is possible to maintain the unsealed state without having to hold the fastener 30 part by hand by forming the dispensing unit 22 with a shape memory resin. That is, when the fastener 30 is repeatedly opened and closed, the bent portion (O) of the fastener 30 is deformed, the male fastener portion 31 and the female fastener portion 32 do not fit well, and the bag body 21 due to local deformation of the fastener 30. The problem of reduced sealing performance is not solved.

  Accordingly, an object of the present invention is to provide a packaging bag dispensing unit that can maintain an open state without being held by hand and can maintain a good sealed state at all times even when repeatedly opened and closed. And it is providing the packaging bag with a fastener provided with this pouring unit.

  The inventors of the present application have made extensive studies to achieve the above object. As a result, the fastener of the dispensing unit is formed so as to be straight when closed, and the male fastener and the female fastener constituting the fastener can be opened without applying external force to the fastener. If the parts are formed so that they can maintain an arcuate shape, the unsealed state can be maintained without having to hold the fastener part by hand, and the bent part is eliminated from the fastener. I got the knowledge that I can do it.

  The present invention has been made based on the above findings and is characterized by the following.

  The invention according to claim 1 is a packaging bag pouring unit comprising a pair of opposing wall surfaces for pouring out the contents contained in the bag main body and sealing the bag main body, having a fastener. The fastener includes: a male fastener portion formed on the inner surface of one of the wall surface portions; and a female fastener portion formed on the inner surface of the other wall surface portion to which the male fastener portion is fitted. The fastener is formed in a linear shape with the fastener closed, and the male fastener portion and the female fastener portion are arc-shaped with each other even when no external force is applied to the fastener in the opened state. It is characterized by being formed so that it can be maintained.

  The invention according to claim 2 is the invention according to claim 1, wherein knobs are formed on portions of the outer surface of the wall portion corresponding to the male fastener portion and the female fastener portion, respectively. It has a special feature.

  According to a third aspect of the present invention, there is provided a bag body and a content housed in the bag body having a fastener that is heat-sealed integrally with the bag body at one upper corner portion of the bag body. And a pouring unit for sealing the bag body, the pouring unit comprising a pair of opposing wall surfaces, and the fastener formed on the inner surface of one of the wall surfaces In a packaging bag with a fastener comprising a male fastener part and a female fastener part formed on the inner surface of the other wall surface part into which the male fastener part is fitted, the fastener is in a state in which the fastener is closed The male fastener portion and the female fastener portion can be maintained in an arc shape without applying external force to the fastener in a state where the fastener is opened. Those having features that are.

  The invention according to claim 4 is the invention according to claim 3, wherein knobs are respectively formed on portions of the outer surface of the wall portion corresponding to the male fastener portion and the female fastener portion. It has a special feature.

  According to the present invention, the male fastener portion and the female fastener portion constituting the fastener are formed so that the fastener is formed in a straight line when the fastener is closed and no external force is applied to the fastener in the opened state. If they are formed so that they can maintain an arcuate shape, the opened state can be maintained without having to hold the fastener part by hand, and the bent part is eliminated from the fastener, so that a good sealed state is always maintained. An extraction unit for a packaging bag and a packaging bag with a fastener including the extraction unit can be provided.

It is a front view which shows the packaging bag with a fastener (this invention packaging bag A) of this invention. It is a partial expansion front view which shows the packaging bag with a fastener (this invention packaging bag A) of this invention. It is a bottom view which shows the extraction | pouring unit of the packaging bag with a fastener of this invention (this invention packaging bag A). It is a top view of one wall surface part of the extraction unit. It is a front view of one wall surface part of the extraction unit. It is a rear view of one wall surface part of the extraction unit. It is a bottom view of one wall surface part of the extraction unit. It is a right view of one wall surface part of the extraction unit. It is a perspective view which shows one wall surface part of the extraction | pouring unit, (a) is the perspective view seen from the front side, (b) is the perspective view seen from the back side. It is a top view of the other wall surface part of the extraction unit. It is a front view of the other wall surface part of the extraction unit. It is a rear view of the other wall surface part of the extraction unit. It is a bottom view of the other wall surface part of the extraction unit. It is a right view of the other wall surface part of the extraction unit. It is a perspective view which shows the other wall surface part of the extraction | pouring unit, (a) is the perspective view seen from the front side, (b) is the perspective view seen from the back side. It is sectional drawing which shows a male fastener part. It is sectional drawing which shows a female fastener part. It is a figure which shows the supply process of the extraction | pouring unit. It is a schematic perspective view which shows the method of the content extraction, (a) is a figure which shows the method of extraction in the conventional packaging bags C and D, (b) is a packaging bag with a fastener of this invention ( It is a figure which shows the method of extraction in this invention packaging bag A). It is a front view which shows another packaging bag with a fastener (this invention packaging bag B) of this invention. It is a front view which shows the conventional packaging bag C. FIG. It is a front view which shows the extraction | pouring unit. It is a perspective view which shows the extraction | pouring unit. It is the sectional view on the AA line of FIG. It is a front view which shows the conventional packaging bag D. FIG. It is a perspective view which shows the extraction | pouring unit of the conventional packaging bag D. FIG.

  Next, an embodiment of a packaging bag with a fastener provided with the dispensing unit of the present invention will be described with reference to the drawings. Hereinafter, the packaging bag with a fastener provided with the pouring unit of this invention is referred to as the present invention packaging bag A.

  FIG. 1 is a front view showing the packaging bag A of the present invention, FIG. 2 is a partially enlarged front view showing the packaging bag A of the present invention, and FIG. 3 is a bottom view showing the dispensing unit of the packaging bag A of the present invention.

  As shown in FIGS. 1 and 2, the packaging bag A of the present invention has a bag body 1 and a fastener 3 that is heat-sealed integrally with the bag body 1 at one upper corner portion of the bag body 1. Out unit 2

  The bag body 1 is composed of a pair of opposed flat portions 4 and a bottom surface portion 5, similarly to the conventional packaging bags C and D. The side edges 4 a of the flat surface portion 4 are heat-sealed with each other to form a cylindrical body 6, and the bottom surface portion 5 closes the lower portion of the cylindrical body 6. The bottom surface portion 5 closes the lower portion of the cylindrical body 6. The bottom surface portion 5 can be folded into an inverted V shape in the cylindrical body 6 along a fold line 7 formed at the center thereof. The lower edge 6a of the cylindrical body 6 and the peripheral edge 5a of the bottom surface portion 5 are heat-sealed, and when the bottom surface portion 5 is widened, the bottom surface portion 5 has a substantially elliptical shape. The bag body 1 is not limited to the above shape.

  As shown in FIG. 3, the dispensing unit 2 of the present invention includes a pair of opposing wall surface portions 8 and 9, and dispenses the contents accommodated in the bag body 1 and seals the bag body 1. As shown in FIG. 10, the dispensing unit 2 is inserted between a pair of flat portions 4 of the bag body 1 and heat-sealed to one upper corner portion of the bag body 1 in the manufacturing process of the packaging bag. Thereby, the corner part of the bag body 1 protrudes from the dispensing unit 2. An opening 10 is formed at the corner of the bag body 1 corresponding to the upper edge of the dispensing unit 2. The bag body 1 is opened by tearing the bag body 1 along the opening part 10. At least one end (in this example, only one end) of the opening portion 10 is formed with a notch 11 so that the bag body 1 can be easily cut (see FIG. 2).

  The wall surface portions 8 and 9 may be triangular and the corner portion of the bag body 1 may be formed by the dispensing unit 2. In this case, the opening part 10 is formed in the wall surface parts 8 and 9 of the extraction unit 2.

  The fastener 3 includes a male fastener portion 12 as shown in FIG. 8 and a female fastener portion 13 as shown in FIG. 9 into which the male fastener portion 12 is fitted. As shown, the fastener 3 is formed in a straight line with the closed state. As will be described later, the male fastener portion 12 and the female fastener portion 13 are formed in an arc shape so as to face the inner surfaces of the pair of wall surface portions 8 and 9, and maintain the unsealed state without applying external force to the fastener 3. To do. The male fastener portion 12 and the female fastener portion 13 may have a shape as shown in FIG. 16 or other shapes.

  As shown in FIG. 4 and FIG. 5, one wall surface portion 8 of the dispensing unit 2 has a substantially trapezoidal front shape, is curved in an arc shape without applying an external force, and is elastic by applying an external force. Deforms into a substantially flat plate against the force.

  The peripheral edge of one wall surface portion 8 is heat-sealed to the inner surface of the upper corner portion of the bag body 1, that is, the inner surface of the upper corner portion of one flat surface portion 4 constituting the bag body 1. On the inner surface of one wall surface portion 8, a male fastener portion 12 is formed integrally with the one wall surface portion 8. Therefore, the male fastener portion 12 is formed to be linear as shown in FIG. 4C when the one wall surface portion 8 is viewed from the back surface, and the one wall surface portion 8 is viewed from the bottom surface. As shown in FIG. 4 (d), it is formed to be curved in an arc shape. A knob 14 is formed on the outer surface of the one wall surface portion 8 so as to protrude from the one wall surface portion 8.

  Openings 15 and 16 are formed in one wall surface portion 8. In the process of heat-sealing one wall surface portion 8 to the bag body 1, the opening 15 is provided when one of the wall surface portions 8 is picked up by an arm (neither shown) of the supply robot. Is held in a predetermined direction, and the opening 11 is for positioning the one wall surface portion 8.

  As shown in FIGS. 6 and 7, the other wall surface portion 9 of the dispensing unit 2 has the same size as the one wall surface portion 8, the front shape is formed in a substantially trapezoidal shape, and no external force is applied. In the state, it is curved in an arc shape with the same curvature as the one wall surface portion 8, and is deformed into a substantially flat plate shape against the elastic force by applying an external force.

  The periphery of the other wall surface portion 9 is overlapped with the one wall surface portion 8, and the inner surface of the upper corner portion of the bag body 1, that is, the inner surface of the upper corner portion of the other flat surface portion 4 constituting the bag body 1. It is heat-sealed. On the inner surface of the other wall surface portion 9, a female fastener portion 13 is formed integrally with the other wall surface portion 9. Accordingly, the female fastener portion 13 is formed in a straight line when the other wall surface portion 9 is viewed from the back as shown in FIG. 6C, and the other wall surface portion 9 is viewed from the bottom surface. As shown in FIG. 6 (d), it is formed to be curved in an arc. A knob 17 is formed on the outer surface of the other wall surface portion 9 so as to protrude from the other wall surface portion 9.

  Openings 18 and 19 are formed in the other wall portion 9. The opening 18 is provided when the other wall surface 9 is heat-sealed to the bag body 1 when the dispensing unit 2 is picked up by an arm (none of which is shown) of the supply robot. Is held in a predetermined direction, and the opening 19 is for positioning the other wall surface portion 9.

  The knobs 14 and 17 formed on the one and other wall surface portions 8 and 9 are formed orthogonal to the male and female fastener portions 12 and 13, but the male and female fastener portions 12, 13 may be formed in parallel. The shape of the knobs 14 and 17 is not particularly limited as long as it is a shape that can be easily picked by hand, such as a square, a circle, and an ellipse.

  As described above, one and the other wall surface portions 8 and 9 have at least the heat-sealing layer of the bag body 1 in which the heat-sealing surface with the bag body 1 is selected from PE (polyethylene) or PP (polypropylene). And the same kind of polyolefin resin, and may be composed of a resin including a shape memory resin.

  As described above, the male fastener portion 12 and the female fastener portion 13 of the fastener 3 are formed so as to face the inside of the one wall surface portion 8 and the other wall surface portion 9 that are curved in an arc shape with the same curvature. If no external force is applied to the wall surface portions 8 and 9, that is, if no external force is applied to the fastener 3, each wall surface portion 8 and 9 maintains a curved state, and therefore, after opening, the zipper 3 portion continues to be gripped by hand. Even if not, the opened state can be maintained. In order to seal the bag body 1, as shown by the arrows in FIG. 3, the wall surfaces 8 and 9 may be pressed against these elastic forces to close the fastener 3.

  Even if the opening and closing of the fastener 3 is repeated, since the bent portion is not formed in the fastener 3, the male fastener portion 12 and the female fastener portion 13 fit well over the entire length. Therefore, the problem of deterioration of the sealing performance of the bag body 1 due to local deformation of the fastener 3 does not occur.

  According to the packaging bag A of the present invention configured as described above, by tearing the opening portion 10, the hands 14 and 17 are picked by hand and pulled in opposite directions, and the fastener 3 is opened and opened. The contents can be poured out. At this time, since the unsealed state is maintained without continuing to hold the fastener 3 portion, the contents are heavy, such as powders, or large packaging bags for storing bulky contents. However, as shown in FIG. 11 (b), it is only necessary to hold the bag body 1 with one hand. That is, since the bag body 1 can be held with one hand so that the bag body 21 does not hang down due to the weight of the contents, the contents can be easily and reliably poured out with one hand. Of course, the bag body 1 may be held with both hands, but even in this case, it is not necessary to continue to hold the fastener 3 portion with one hand, so that the pouring can be easily performed.

  On the other hand, in order to seal the bag body 1, both wall surfaces 8 and 9 of the fastener 3 may be pressed against the elastic force by hand and the fastener 3 may be closed.

  The above is an example in which the dispensing unit 2 is heat-sealed to one upper corner portion of the bag body 1, but may be heat-sealed to the center of the upper edge of the bag body 1 as shown in FIG. 12. . Also in this case, the packaging bag can be opened by opening the fastener 3 after tearing the opening portion 10. If the fastener 3 is closed after the contents are poured out, the bag body 1 can be sealed. Further, the provision of the knob 14 (only one of them is shown) is the same as the case where the dispensing unit 2 is heat-sealed to one upper corner of the bag body 1 in terms of easy opening.

  Next, the material of the packaging bags A and B of the present invention will be described.

  First, regarding the material of the bag body 1, it is sufficient that at least the base material layer and the heat fusion layer are laminated and the innermost layer is the heat fusion layer.

  The base material layer is preferably a film having excellent printability and further having piercing strength, tensile strength, impact resistance and the like. Examples of the material of the base material layer include polyethylene terephthalate, polypropylene, polyamide, ethylene vinyl alcohol copolymer, and the like, and these biaxially stretched films or uniaxially stretched films are preferable. Moreover, in order to provide these films with a barrier property against oxygen and water vapor, a deposited film in which a metal such as aluminum or magnesium or an oxide such as silicon oxide is deposited, a barrier coating agent such as polyvinylidene chloride, etc. A coated film coated with may be used. The base material layer may be a single body of the film or a laminate. The thickness of the base material layer is preferably 6 to 50 μm, and more preferably 9 to 30 μm.

  The heat sealing layer is a heat sealable layer. Examples of the material of the heat-fusible layer include high-density polyethylene, low-density polyethylene, linear low-density polyethylene, and polypropylene. These unstretched films, multilayer films co-extruded in combination with the above resins, etc. preferable. The thickness of the heat sealing layer is preferably 10 to 200 μm, and more preferably 20 to 100 μm.

  The laminated film may have an intermediate layer between the base material layer and the heat-sealing layer as necessary.

  As an intermediate | middle layer, the film provided with functionality, such as oxygen barrier property, water vapor | steam barrier property, and tear property, is mentioned, for example. Examples of the material of the intermediate layer include a metal foil such as aluminum, the above-described deposited film, a coat film, a film with various functions, and the like. Two intermediate layers may be provided as necessary. The thickness of the intermediate layer is preferably 6 to 50 μm, and more preferably 9 to 30 μm.

  The lamination method is as follows. A laminated film consisting of a base material layer, a heat-sealing layer, and an intermediate layer to be used as needed is applied by a known method such as a dry laminating method using an adhesive or an extrusion laminating method using a heat-adhesive resin. It can be manufactured by combining them.

  Next, although it is a material of the pouring unit 2, since it needs to be heat-sealed with the bag body 1, the material is made of polyolefin such as high-density polyethylene, medium-density polyethylene, low-density polyethylene, and polypropylene. It is desirable that the resin is. The dispensing unit 2 may be a single layer or a multilayer structure. Further, for the purpose of imparting shape memory characteristics, a multilayer structure may be formed by coextrusion of polyester, polyurethane, styrene, butadiene, polynorbornene, trans polyisoprene, and polyolefin. However, it is desirable to use the same kind of resin as the heat-sealing layer on the heat-sealing surface with the bag body 1 from the viewpoint of adhesion.

DESCRIPTION OF SYMBOLS 1: Bag main body 2: Pouring unit 3: Fastener 4: Plane part 4a: Side edge 4b: Upper edge 5: Bottom part 5a: Perimeter 6: Cylindrical body 6a: Lower edge 7: Folding line 8: One wall surface part 8a : Side edge 9: other wall surface portion 9a: side edge 10: opening portion 11: notch 12: male fastener portion 13: female fastener portion 14: knob 15: opening 16: opening 17: knob 18: opening 19: Opening 21: Bag main body 21a: Opening 22: Pouring unit 22a: Opening 23: Plane 23a: Side edge 24: Bottom 24a: Perimeter 25: Cylindrical body 25a: Lower edge 26: Folding line 27: Wall part 28 : Seal part 29: Folding line 30: Fastener 31: Male fastener part 32: Female fastener part 33: Opening part 34: Notch 35: Opening 36: Knob

Claims (4)

In the dispensing unit consisting of a pair of wall surfaces facing each other for sealing the bag body and the dispensing of the contents contained in the bag body having a fastener,
The fastener comprises a male fastener part formed on the inner surface of one of the wall surface parts, and a female fastener part formed on the inner surface of the other wall surface part, into which the male fastener part is fitted, The fastener is linearly formed with the fastener closed, and the male fastener portion and the female fastener portion maintain an arc shape with each other even when no external force is applied to the fastener when the fastener is opened. A pouring unit for a packaging bag, which is formed so as to be able to do so.   The pouch unit for a packaging bag according to claim 1, wherein knobs are respectively formed on portions of the outer surface of the wall portion corresponding to the male fastener portion and the female fastener portion. . A bag body, and a pour of contents contained in the bag body and a seal of the bag body having a fastener that is heat-sealed integrally with the bag body at one upper corner of the bag body The pouring unit comprises a pair of opposing wall surfaces, and the fastener comprises a male fastener formed on the inner surface of one of the wall surfaces, and the male In a packaging bag with a fastener comprising a female fastener part formed on the inner surface of the other wall surface part into which the fastener part is fitted,
The fastener is linearly formed with the fastener closed, and the male fastener portion and the female fastener portion maintain an arc shape with each other even when no external force is applied to the fastener when the fastener is opened. A zippered packaging bag, characterized by being formed.   4. The zippered packaging bag according to claim 3, wherein knobs are formed on portions of the outer surface of the wall portion corresponding to the male fastener portion and the female fastener portion, respectively.

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