JP2014184982A - Packaging bag with pouring tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent occurrence of leakage of a content caused by a seal failure, and to improve a self-standing property and designability of a packaging bag, in the packaging bag with a pouring tool having a gusset part on the side face.SOLUTION: A packaging bag with a pouring tool which has a pair of front-and-rear planar parts and a pair of right-and-left gusset side face parts, and in which the pouring tool is mounted on the upper edge part is formed so that the interval between facing folding lines on the gusset side face parts is smaller than the width of an adhesive joint of the pouring tool from a lower part to a periphery of the height direction intermediate, and further larger than the width of the adhesive joint of the pouring tool from the periphery of the height direction intermediate to an upper part.

Description

  The present invention relates to a packaging bag with a dispensing tool that accommodates food, chemicals, cosmetics, pharmaceuticals, detergents, industrial products and the like.

  As a packaging bag with a dispensing tool, a pair of front and rear sheets is sandwiched with side sheets folded inward from both side edges to form a gusset portion, and the periphery of the side sheets is heat-sealed with the front and rear sheets, There is provided a side gusset type packaging bag in which an upper edge portion and a lower edge portion are heat-sealed and a pouring tool is heat-sealed on the upper edge portion (see, for example, Patent Document 1 below).

  Side gusset type packaging bags have a gusset portion on both sides of the packaging bag compared to a standing type packaging bag that has a gusset portion at the bottom. Can do. For this reason, it has the characteristics that formality, grip nature, and transportation efficiency are excellent.

  However, the lower edge seal portion formed at the lower edge portion of the front and rear seats has a high rigidity and is difficult to bend to either one of the front and rear seats.

  In order to improve the self-supporting property, a packaging bag using a rectangular sheet as a bottom plate is provided (for example, see Patent Document 2 below). This packaging bag is flat because the seal portion does not protrude from the bottom surface, and has excellent self-supporting properties.

  However, the process of heat-sealing the bottom plate is performed in a state where the bottom plate 101 is folded in two along the width direction of the packaging bag 100 as shown in FIG. For this reason, heat sealing is performed in a state where two sheets of front and rear sheets 102, four side sheets 103, and two bottom plates 101, ie, a total of eight sheets, are overlapped. As a result, poor sealing is likely to occur. In particular, in the packaging bag 100 that accommodates the fluid, there is a possibility that the contents leak due to a sealing failure in the vicinity of the square corner of the bottom plate 101.

  In order to improve the self-sustainability without leakage of the contents, in the side gusset type packaging bag, the size in the thickness direction of the packaging bag is increased, and the bottom formed when the contents are accommodated more It only needs to be close to a square. If the horizontal cross-sectional shape of the packaging bag can be made close to a square, in addition to improving self-sustainability, compared to conventional side gusset pouches, it is difficult to be restricted in size in the thickness direction, so it is a store with excellent design It is possible to provide a packaging bag that is easily caught by eyes.

  In order to make the horizontal cross-sectional shape of the packaging bag closer to a square, it is necessary to reduce the interval between the folding lines of the left and right side sheets and to increase the width of the gusset portion. The process of sealing the dispensing tool to the packaging bag is performed by adhering the dispensing tool from the opening at the upper edge of the packaging bag with the side sheet folded in two between the folding lines inserted and sealed between the front and rear sheets. The part is inserted and sealed. If the gap between the folding lines of the left and right side sheets is smaller than the width of the bonding part of the pouring tool at the upper edge of the packaging bag, the side sheet and the pouring tool will be sealed together at the opening of the upper edge. A seal failure is likely to occur due to variations in heat and pressure due to the seal bar. Therefore, the size of the packaging bag in the thickness direction could not be increased.

JP 2000-185740 A JP 2005-205757 A

  The present invention has been made in view of such a state of the art, and in a packaging bag with a pouring tool having a gusset portion on its side surface, prevents leakage of contents due to poor sealing, and the packaging bag is self-supporting. The problem is to improve the design.

  As a result of intensive studies to solve the above problems, the inventor of the present invention has a pair of front and rear plane portions and a pair of left and right gusset side portions, and an upper edge portion. It is a packaging bag with a pouring tool to which the pouring tool is attached, and the interval between the opposing fold lines of the side face of the gusset is smaller than the middle of the height direction below the width of the bonding portion of the pouring tool, and The present invention provides a packaging bag with a pour tool that is formed so as to be larger than the width of the bonding portion of the pour tool above the middle in the height direction.

  According to this, in the packaging bag with a pouring tool having a gusset portion on the side surface, the size in the thickness direction of the packaging bag (width of the gusset portion) can be increased. A packaging bag which is stable and excellent in design can be provided. Furthermore, it is possible to prevent the occurrence of sealing failure due to variations in heat and pressure due to the seal bar. In addition, a folding line shall mean the ridgeline of the inner edge of a gusset side part in the state which folded the packaging bag.

  The invention according to claim 2 is the invention of the packaging bag with a dispensing tool according to claim 1, wherein the folding line is continuous with the vertical side portion extending in the height direction from the lower edge portion of the packaging bag and the vertical side portion. And an inclined portion extending upward in the outward direction.

  According to this, the width of the gusset portion can be kept large and constant in the vertical side portion, the width of the upper portion can be narrowed by the inclined portion, the self-supporting property is stable, and the packaging has excellent design properties. A bag can be provided.

  The invention according to claim 3 is the invention of the packaging bag with a pouring tool according to claim 1 or claim 2, and is opposed to the interval t1 from the inner edge of the side edge seal part to the folding line below the middle vicinity in the height direction. The ratio t2 / t1 with the interval t2 between the folding lines is 1.2 or less.

  According to this, the ratio t2 / t1 between the interval t1 from the inner edge of the side edge seal portion to the fold line on the lower side side from the vicinity of the middle and the interval t2 between the fold lines facing each other is 1.2 or less, Independence can be dramatically stabilized.

  According to the present invention, in a packaging bag with a pouring tool having a gusset portion on the side surface, variations in heat and pressure due to the seal bar can be suppressed, and the occurrence of leakage of contents due to poor sealing can be prevented. Furthermore, since the width | variety of a gusset part can be enlarged, the packaging bag with which the self-supporting property was stabilized can be provided. Moreover, the packaging bag excellent in the design property can be provided by making the horizontal cross section of the packaging bag closer to the square from the bottom surface to the middle of the height direction.

It is a perspective view of the packaging bag with the extraction tool of 1st Embodiment. It is a front view of the folded state of the packaging bag with the extraction tool of 1st Embodiment. It is (a) front view and (b) bottom view of the extraction tool of the packaging bag with the extraction tool of 1st Embodiment. It is a figure for demonstrating the gusset side part of the packaging bag with a extraction tool of 1st Embodiment. It is a figure for demonstrating another gusset side part. It is a figure for demonstrating the gusset side part of the packaging bag with a extraction tool of 2nd Embodiment. It is a perspective view which shows the conventional packaging bag.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below with reference to the drawings. Here, the horizontal direction in FIG. 2 is the width direction, the vertical direction is the height direction, and the front-rear direction is the thickness direction. The width of the packaging bag and the size in the thickness direction refer to the distance from the inner edge of one seal part to the inner edge of the other seal part. The height of the packaging bag refers to the outer edge of the top seal part from the outer edge of the bottom seal part in the folded state. The sheet includes what is generally called a film.

<First Embodiment>
A first embodiment of the present invention will be described with reference to FIGS.

  The packaging bag with a pour tool 1 according to the first embodiment of the present invention has a pair of front and rear plane portions 2 and a pair of left and right gusset side portions 3, and a pour tool 4 is attached to the upper edge portion. The pair of front and rear plane portions 2 includes a front surface portion 2a and a rear surface portion 2b. The gusset side surface portion 3 is folded inward from the left and right side edges between the front surface portion 2a and the rear surface portion 2b to form a gusset portion.

  The flat surface portion 2 and the gusset side surface portion 3 are made of a flexible sheet, and a sealant layer is formed on at least one surface. The configuration and thickness of the flexible sheet are not particularly limited, and a design having an oxygen barrier property, a water vapor barrier property, and the like can be appropriately selected according to the properties of the contents. For example, a sheet obtained by laminating a polyethylene terephthalate resin (thickness 12 μm), a polyamide resin (thickness 15 μm), and a polyethylene resin (thickness 100 μm) in this order from the outer layer side.

  The flat surface portion 2 is overlaid so that the sealant layers of the front surface portion 2a and the rear surface portion 2b face each other. Four side edge seal portions S2 are formed in the height direction by heat-sealing both side edges of the flat surface portion 2 with the peripheral edge of the gusset side surface portion 3.

  A bottom seal portion S3 is formed on the lower edge portion of the flat surface portion 2 by heat-sealing the lower edge portions of the front surface portion 2a and the rear surface portion 2b. Further, diagonal seal portions S4 extending diagonally upward to the side edge seal portion S2 are formed on both longitudinal sides of the bottom seal portion S3. The oblique seal portion S4 is formed by heat-sealing the flat portion 2 and the gusset side portion 3.

  The oblique seal portion S4 is preferably formed so that the angle α with respect to the bottom seal portion S3 is 30 to 50 degrees. More preferably, it is 45 degrees. When the contents are stored and dropped, the impact caused by the drop can be prevented from being concentrated on a specific portion of the gusset bag, so that it is difficult to break the bag and safety is excellent. The oblique seal portion S4 is not limited to a straight line, and may be a curved shape.

  A top seal portion S1 is formed on the upper edge portion of the flat portion 2 by heat-sealing the upper edge portion of the bonding portion 43 of the pouring tool 4 and the flat portion 2.

  The pouring tool 4 is fixed by being inserted through an opening between the front surface portion 2a and the rear surface portion 2b at the upper end of the flat surface portion 2, and heat sealed. As shown in FIG. 3, the dispensing tool 4 includes a cylindrical portion 41, a flange portion 42, and an adhesive portion 43 that are continuously provided in the axial direction from above. A stopper is detachably attached to the tubular portion 41. The bonding portion 43 has a boat shape extending in the width direction, and a rib 44 for welding is formed on the surface. The dispensing tool 4 is preferably made of a synthetic resin excellent in moldability and workability. Examples of the synthetic resin include polyolefin resins such as polyethylene and polypropylene, polystyrene resins, polyamide resins, polyester resins, acrylic resins, vinyl chloride resins, vinylidene chloride resins, and polyether sulfones. As a molding method, it is preferable from the viewpoint of cost and the like to be integrally molded by appropriate molding such as injection molding.

  As shown in FIG. 2, when the packaging bag 1 with the pour tool is folded, the interval between the opposing folding lines 6 of the pair of left and right gusset side portions 3 is lower than the middle in the height direction of the pouch 1 with the pour tool. Then, it is smaller than the width | variety L of the adhesion part 43 of the extraction tool 4. FIG. Moreover, it forms so that it may become larger than the width | variety L of the adhesion part 43 of the extraction tool 4 in the upper direction from the height direction intermediate vicinity of the packaging bag 1 with an extraction tool. The folding line 6 refers to the ridgeline of the inner edge of the gusset side surface portion 3 in a state where the packaging bag 1 with the pouring tool is folded.

  The folding line 6 has a vertical side portion 61 extending upward in the height direction from the lower edge portion of the packaging bag 1 with the dispensing tool. Furthermore, an inclined portion 62 that is continuous with the vertical side portion 61 and extends upward in the upper direction is formed above the vicinity of the middle in the height direction of the packaging bag 1 with the dispensing tool. Since the space | interval of the folding line 6 can be made smaller than the width | variety L of the adhesion part 43 of the extraction tool 4 in a lower part, the magnitude | size of the thickness direction of the packaging bag 1 with an extraction tool can be designed large. For this reason, a bottom face can be made closer to a square and self-supporting property can be improved. And since it is larger than the width | variety L of the adhesion part 43 of the extraction tool 4 in an upper part, it does not affect the heat seal of the extraction tool 4. FIG.

  As shown in FIG. 4A, first, the left and right gusset side portions 3 are folded in two along a vertical fold line 71 along the height direction. Next, as shown in FIG. 4B, the corner 3d sandwiched between the gusset inner side 3c and the gusset upper side 3a is formed by the diagonal fold line 72 so that the gusset upper side 3a is along the gusset outer side 3b. By folding the side 3b to the side, a triangular flap f of an isosceles right triangle having a corner 3d as an apex angle is formed. The flap first side f1 of the triangular flap f is a fold line 6 composed of a diagonal fold line 72. The flap second side f2 is composed of the vertical fold line 71, and is the side that forms an angle β with the flap first side f1. The flap third side f3 is composed of the upper side 3a of the gusset and is the opposite side of the corner β. The flap third side f3 is bent at an oblique fold line 72 so as to be shifted about 1 to 5 mm inward from the gusset outer side 3b. The flap third side f3 is bent and sealed so as to fit in the region of the side edge seal portion S2. The side face seal portion S2 seals the gusset side surface portion 3 with the front surface portion 2a, and the triangular flap f with the front surface portion 2a and the gusset side surface portion 3.

  In the embodiment described above, the flap third side f3 is shifted to the inside of the gusset outer side 3b. However, as shown in FIG. 5A, the flap third side f3 and the gusset outer side 3b are overlapped. It may be a triangular flap f bent into a state. In the above embodiment, the angle β = 45 degrees has been described. However, as shown in FIG. 5B, a triangular flap f having an angle β = 45 degrees or more may be used, as shown in FIG. 5C. It may be a triangular flap f with an angle β = 45 degrees or less. Each flap third side f3 is sealed so as to fit in the region of the side edge seal portion S2. In the case of (b) and (c), the side edge seal portion S2 is sealed with a shape protruding inward. The side edge seal portion S2 seals the gusset side surface portion 3 with the front surface portion 2a, and the triangular flap f with the front surface portion 2a and the gusset side surface portion 3.

<Second Embodiment>
Next, 2nd Embodiment of the packaging bag 1 with the extraction tool which concerns on this invention is described, referring FIG. In the following description, a structure different from that of the first embodiment will be described. The same structure is denoted by the same reference numeral, and the description thereof is omitted.

  In the first embodiment, the inclined portion 62 is formed by folding along the diagonal fold line 72, but the gusset side surface portion 3 is folded in half on the V shape and the upper end is cut obliquely upward toward the gusset outer side 3b side. As a result, an inclined portion 62 is formed, and the inclined portion 62 is sealed.

  In each of the embodiments described above, the packaging bag 1 with the dispensing tool in which the top seal portion S1 reaches the side edge seal portion S2 has been described, but the side edge seal portion is obliquely downward on both sides in the longitudinal direction of the top seal portion S1. A shoulder seal portion extending up to S2 can also be formed. The shoulder seal portion is formed by heat-sealing the flat portion 2 and the gusset side portion 3. The shoulder seal portion is not limited to a straight line, and may have a round shape. Moreover, in each said embodiment, although what provided the diagonal seal | sticker part S4 was demonstrated, it does not necessarily need to provide the diagonal seal | sticker part S4.

  In the above embodiment, the case where the upper end portion of the folding line 6 reaches the side edge seal portion S2 has been described, but the upper end portion of the folding line 6 may reach the top seal portion S1 or the shoulder seal portion.

  EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in detail, this invention is not limited to these.

[Examples 1-7 and Comparative Examples 1-3]
A packaging bag 1 with a pouring tool as shown in FIG. 2 was prepared using sheets having the following configurations A to C. The distance W between the inner edges of the left and right side edge seal portions is 64 mm, 84 mm, and 104 mm, and the distance t1 from the inner edge of the side edge seal portion S2 to the folding line 6 is changed to change the width L of the adhesive portion 43 of the extraction tool 4 The 35 mm extraction tool 4 was heat-sealed and attached. The oblique seal portion S4 has an angle α = 45 ° with respect to the bottom seal portion S3, an angle β = 45 ° of the triangular flap f, and an interval h1 = 40 mm between the upper end of the folding line 6 and the upper edge portion of the packaging bag.
(1) Sheet configuration Sheet configuration A has a flat portion 2 with a polyethylene terephthalate film (thickness 12 μm) as the outermost layer, a polyamide film (thickness 15 μm) as the intermediate layer, and a linear low-density polyethylene film (thickness 100 μm) as the innermost layer. ) Was dry-laminated using a polyester-based adhesive. For the gusset side 3, a polyethylene terephthalate film (thickness 12 μm) is used as the outermost layer, a polyamide film (thickness 15 μm) is used as the intermediate layer, a linear low density polyethylene film (thickness 80 μm) is used as the innermost layer, and a polyester adhesive is used. Then, a sheet produced by dry lamination was used.
Sheet configuration B has a flat portion 2 and a gusset side portion 3 with a polyethylene terephthalate film (thickness 12 μm) as the outermost layer, a polyamide film (thickness 15 μm) as the intermediate layer, and a linear low density polyethylene film (thickness 100 μm) as the innermost layer. ) Was dry-laminated using a polyester-based adhesive.
The sheet structure C is made of a polyethylene-based terephthalate film (thickness 12 μm) as the outermost layer, a polyamide film (thickness 15 μm) as the intermediate layer, a linear low density polyethylene film (thickness 120 μm) as the innermost layer, A sheet produced by dry lamination using an adhesive was used. For the gusset side surface 3, a polyethylene terephthalate film (thickness 12 μm) is used as the outermost layer, a polyamide film (thickness 15 μm) is used as the intermediate layer, a linear low density polyethylene film (thickness 100 μm) is used as the innermost layer, and a polyester adhesive is used. Then, a sheet produced by dry lamination was used.

First, evaluation methods used in Examples and Comparative Examples will be described.
<Independence test>
Each packaging bag 1 with a pouring tool was prototyped and filled with 400 mL of water, and the self-supporting stability immediately after was confirmed. The number of samples was 3 each. The results are shown in Table 1.
○: Stable and independent △: Self-sustained but slightly unstable ×: Not independent

Ｗ：左右側縁シール内縁間の間隔(包装袋の幅）
ｔ１：高さ方向中間付近より下方における側縁シール部の内縁から折込線までの間隔
ｔ２：高さ方向中間付近より下方における対向する折込線間の間隔
Ｌ：注出具の接着部の幅
Ｔ：包装袋の厚み
Ｈ：包装袋の高さ

W: Spacing between the inner edges of the left and right side seals (width of the packaging bag)
t1: The distance from the inner edge of the side edge seal portion below the middle in the height direction to the folding line t2: The spacing between the opposing folding lines below the middle in the height direction L: The width of the adhesive portion of the extraction tool T: Packaging bag thickness H: Packaging bag height

  As shown in Table 1, the ratio t2 between the interval t1 from the inner edge of the side edge seal portion to the folding line 6 and the interval t2 between the opposing folding lines 6 below the middle in the height direction of the packaging bag 1 with the dispensing tool When / t1 is 1.2 or less, it is confirmed that the intervals between the inner edges of the left and right side edge seal portions are 64 mm, 84 mm, and 104 mm that are stable and self-supporting, or that they are self-supporting but slightly unstable. It was. Furthermore, when t2 / t1 was 1.0 or less, it was confirmed that the distance between the inner edges of the left and right side edge seal portions was stable and independent in all examples of 64 mm, 84 mm, and 104 mm. On the other hand, when t2 / t1 was 1.4, it was confirmed that Comparative Examples 1 and 2 were not independent.

DESCRIPTION OF SYMBOLS 1 Packing bag with extraction tool 2 Flat part 2a Front part 2b Rear part 3 Gazette side part 3a Gazette upper side 3b Gazette outer side 3c Gazette inner side 3d Corner part 4 Extraction tool 41 Cylindrical part 42 Flange part 43 Adhesive part 44 Rib 5 Lid Plug 6 Folding line 61 Vertical side part 62 Inclining part 71 Vertical folding line 72 Diagonal folding line f Triangle flap f1 Flap first side f2 Flap second side f3 Flap third side S1 Top seal part S2 Side edge seal part S3 Bottom seal part S4 Diagonal Seal portion t1 Distance between the inner edge of the side edge seal portion and the fold line below the middle in the height direction L2 Distance between opposing fold lines below the middle in the height direction L Width of the adhesive portion of the extraction tool

Claims (3)

A packaging bag with a pouring tool having a pair of front and rear flat portions and a pair of left and right gusset side portions, and the pouring tool attached to the upper edge portion,
The gap between the opposing fold lines of the gusset side surface is smaller than the width of the bonding portion of the pouring tool below the middle of the height direction, and is larger than the width of the bonding portion of the pouring tool above the middle of the height direction. A packaging bag with a pouring tool, wherein the packaging bag is formed to be larger than the width.   2. The note according to claim 1, wherein the folding line includes a vertical side portion extending in a height direction from a lower edge portion of the packaging bag and an inclined portion extending continuously upward from the vertical side portion. Packaging bag with equipment. The ratio t2 / t1 between the interval t1 from the inner edge of the side edge seal part to the folding line below the middle in the height direction to the folding line and the spacing t2 between the opposing folding lines is 1.2 or less. Item 3. A packaging bag with a dispensing tool according to claim 1 or 2.

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