JP2018012519A - Easy-opened packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-opened packaging bag which facilitates opening from a side of a storage part to a side of a top seal part.SOLUTION: A pillow type packaging bag in the invention includes a storage part sealed by a top seal part, a bottom seal part, and a back seal part and is made of one sheet of a laminate film. The back seal part is provided on a back surface, and a cut is provided within a region of the top seal part. The cut is provided on the laminate film on a surface on the opposite side of the back seal part in a manner to cross a position corresponding to the back seal part and is arranged in a position close to an outer edge rather than an inner edge of the top seal part. The easy-opened packaging bag is opened in a direction from the side of the storage part to the side of the top seal part from an intersection of the inner edge of the top seal part and an inner edge of the back seal part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pillow-type packaging bag, and more particularly to an easy-open packaging bag that is opened from a storage portion side toward a top seal portion side.

Conventionally, pillow-type packaging bags are widely used for packaging potato chips, snacks, cookies, biscuits, chocolate confectionery, hail, snacks, and other confectionery.
The pillow-type packaging bag has a top seal part, a bottom seal part, and a back seal part on the back. For easy opening of the packaging bag, for example, a notch is provided in the top seal part or the back seal part. The side of the packaging bag is cut off and opened. However, when one side of the packaging bag is cut and opened, the opening direction is bent outward and the one side cannot be cut, and the opening necessary for taking out the contents may not be obtained. Therefore, one or more rows of straight or perforated half-cut lines are formed from the top seal part to the bottom seal part along the base part of the back seal part, and the top seal part where the half-cut lines intersect Alternatively, a packaging bag is disclosed that can be opened by being cut along a half-cut line with a bottom seal portion as an opening start end (see, for example, Patent Document 1).

  On the other hand, pillow-type packaging bags filled with potato chips, snacks, cookies, biscuits, chocolate confectionery, hail, snacks, and other confectionery products are usually relatively large in size, so the laminated film on the surface of the packaging bag is usually laminated on the back surface. It is widely practiced to open the film by concentrating the pulling force at the intersection of the top seal portion and the back seal portion by picking the film in the opposite direction. In this case, a strong pulling force is required to open the bag, and there is a problem that it is difficult for children and the elderly to open the bag, and the development of a pillow type packaging bag that can be opened easily is awaited.

JP 2009-18822 A

  Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide an easy-open packaging bag that can be easily opened from the storage portion side toward the top seal portion side. is there.

  In order to achieve the above object, the present invention according to claim 1 is a pillow type comprising a single laminated film having a top seal portion, a bottom seal portion, and a storage portion sealed by a back seal portion. The back seal portion is provided on the back surface, and a cut is provided in a region of the top seal portion, and the cut is provided on the laminated film on the surface opposite to the back seal portion. Is provided so as to intersect with a position corresponding to the portion, and is disposed at a position closer to the outer edge than the inner edge of the top seal portion, from the storage portion side toward the top seal portion side. It is an easy-open packaging bag characterized by opening from the intersection of the inner edge of the top seal part and the inner edge of the back seal part.

  Moreover, the present invention according to claim 2 is the easy-open packaging bag according to claim 1, wherein the notch penetrates the laminated film on the surface opposite to the back seal portion, or is half-cut. It is characterized by being.

  The easy-open packaging bag of the present invention can be easily opened from the storage portion side toward the top seal portion side.

It is the front view and back view which show one Embodiment of the easily openable packaging bag which concerns on this invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is explanatory drawing which shows the structural example of the laminated | multilayer film of the easily openable packaging bag which concerns on this invention. It is explanatory drawing which shows the example of a cutting. It is explanatory drawing which shows the opening method of the easy-open packaging bag of one Embodiment which concerns on this invention.

The above-described present invention will be described in detail below with reference to the drawings.
1 is a front view and a rear view showing an embodiment of an easy-open packaging bag according to the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. 4 is an explanatory view showing a configuration example of a laminated film of an easy-open packaging bag according to the present invention, FIG. 5 is an explanatory view showing an example of cutting, and FIG. 6 is an easy-open packaging according to an embodiment of the present invention. It is explanatory drawing which shows the opening method of a bag, P in the figure is an easily openable packaging bag, P 'is an easily opened easily opened packaging bag, Q is a packaging body, 1 is a top seal part, 1a is a top seal part 1b is the outer edge of the top seal part, 2 is the bottom seal part, 3 is the back seal part, 4 is the notch, 5 is the storage part, 6 is the contents, 7 is the opening part, 8 is the inner edge of the top seal part 10 is a laminated film, 10a is a laminated film on the front surface, 10b is a laminated film on the back surface, 11 is a base material layer, An intermediate layer 13 indicates a heat sealing layer.

  FIG. 1 is a plan view showing an embodiment of an easy-open packaging bag according to the present invention, where (A) is a front view seen from the front surface, (B) is a rear view seen from the back surface, and FIG. FIG. 3 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB of FIG. An easy-open packaging bag P according to an embodiment of the present invention comprises a single laminated film 10, and includes a top seal portion 1 at the top, a bottom seal portion 2 at the bottom, and a back seal portion 3 at the back, and a top seal. This is a pillow type packaging bag provided with a storage part 5 sealed with a part 1, a bottom seal part 2 and a back seal part 3. The easy-open packaging bag P has a back seal portion in which one opposing edge of a laminated film 10 having an inner surface provided with a heat sealing layer 13 (see FIG. 4) is overlapped with the inner surfaces of the heat sealing layer 13. 3 is heat-bonded to form a cylinder, and the top seal portion 1 and the bottom seal portion 2 are heat-bonded to the upper part of the opposite open edge in a state where the back seal part 3 is positioned substantially in the center. Sealed. The top seal portion 1 and the bottom seal portion 2 may be provided in a state where the back seal portion 3 is moved to either the left or right.

  The easy-open packaging bag P of the present invention is provided with a cut 4 in the region of the top seal portion 1 indicated by the hatched portion. The notch 4 is provided in the laminated film 10a on the surface opposite to the laminated film 10b on the back side where the back seal portion 3 is provided, and is straight in the left-right direction so as to intersect with the position corresponding to the back seal portion 3. It is provided in the shape. Further, the notch 4 is arranged at a position closer to the outer edge 1b of the top seal portion than the inner edge 1a of the top seal portion. That is, there is a slight gap between the inner edge 1a of the top seal portion and the notch 4. Although this space | interval is provided in consideration of the kind of resin used for the heat-fusion layer 13, about 0.3 mm-10 mm are good. Further, the cut 4 serves as a trigger for opening the easy-open packaging bag P, and the length in the left-right direction may be at least 0.5 mm.

  Moreover, the notch 4 may be provided through the laminated film 10a on the surface opposite to the back seal portion 3, or may be provided by a half cut. Furthermore, the cut 4 can also be provided through the laminated film 10a on the front surface and the laminated film 10b on the back surface. The half cut will be described later. In the laminated film 10, the side on which the back seal portion 3 is arranged is referred to as a back side laminated film 10 b, and the side opposite to the back seal portion 3 is referred to as a front side laminated film 10 a.

  FIG. 2 is a cross-sectional view taken along line AA of FIG. 1. The back seal portion 3 is provided on the back side of the laminated film 10 b, and the contents 6 (see FIG. 6) is stored in the space surrounded by the laminated film 10. It becomes the storage unit 5. FIG. 3 is a cross-sectional view taken along the line B-B of FIG. 1. The top seal portion 1 formed by thermally bonding the inner surfaces of the laminated film 10a on the front surface and the laminated film 10b on the back surface is the top edge of the top seal portion. A notch 4 is provided between the outer edges 1b of the seal portion, and is arranged at a distance from the inner edge 1a of the top seal portion closer to the outer edge 1b of the top seal portion. In FIG. 3A, the notch 4 shows an example of penetrating the laminated film 10a on the surface. In FIG. 3B, the notch 4 shows an example of penetrating the laminated film 10a on the front surface and the laminated film 10b on the back surface. In FIG. 1, the storage portion 5 is shown in a sealed state, but either the top seal portion 1 or the bottom seal portion 2 is an unjoined opening, and the contents are stored in the storage portion 5 from the opening. After being filled in, it is heat bonded and sealed.

  A laminated film 10 is used for the easy-open packaging bag P, and FIG. 4 shows a configuration example of the laminated film 10. As shown in FIG. 4, the laminated film 10 preferably has a configuration in which a base material layer 11, an intermediate layer 12, and a heat sealing layer 13 are laminated. Moreover, it can also be simplified into two layers of the base material layer 11 or the intermediate | middle layer 12 and the heat sealing | fusion layer 13 with the performance and quality requested | required of the easy-open packaging bag P, or the base material layer 11 or the intermediate | middle layer 12 Or the base material layer 11 and the intermediate | middle layer 12 can also be made into a multilayer and can be made into a multilayer.

  As the base material layer 11 constituting the laminated film 10, since it becomes a basic material constituting the easy-open packaging bag P, a synthetic resin film having excellent properties in mechanical, physical, chemical and the like is used. Polypropylene, polyethylene terephthalate, nylon, polyacrylonitrile, polyvinylidene chloride, polyvinyl alcohol, ethylene / vinyl alcohol copolymer films, cellophane and starting materials such as polylactic acid biaxially stretched films, etc. Can be used. Alternatively, a film having a barrier layer formed by applying a barrier resin composition such as polyvinylidene chloride or polyvinyl alcohol to the above film, or aluminum, aluminum oxide, silicon oxide, indium oxide, tin oxide, zirconium oxide, etc. The thing which vapor-deposited the inorganic substance and provided the vapor deposition layer can be used. As these films, usually, the base material layer 21 is often printed, and printability is required. Therefore, a film stretched in a uniaxial direction or a biaxial direction is preferable. In addition, the thickness of the film constituting the base material layer 21 may be a thickness that can be held to the minimum necessary for strength, rigidity, etc. as a basic material, and may be determined in consideration of the cost, Usually, it is about 9-50 micrometers.

  The intermediate layer 12 is provided when rigidity, light shielding property, gas barrier property, etc. are required by packaging conditions, transportation conditions, contents protective function conditions, and the film used for the base material layer 11 described above, A film provided with the above-described barrier layer or vapor deposition layer, metal foil such as aluminum, iron, copper, and tin can be used. Moreover, what laminated | stacked combining these films etc. 1 or more types may be used. The thickness of the intermediate layer 12 is about 9 to 50 μm.

  The heat sealing layer 13 is preferably a layer formed from a heat-adhesive resin that can be melted by heat and fused to each other, and can be appropriately selected and used depending on the required quality for the packaging bag. Density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, polypropylene, ethylene-α olefin copolymer, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer, ethylene -It can form using resin, such as an acrylic acid copolymer, an ethylene-methacrylic acid copolymer, an ethylene-acrylic acid ester copolymer, an ethylene-methacrylic acid ester copolymer. The thickness of the heat sealing layer 13 is usually about 15 to 80 μm.

  As a method of laminating the base material layer 11, the intermediate layer 12, and the heat fusion layer 13, for example, a dry lamination method of laminating using a dry laminating adhesive such as a urethane type, polyethylene resin, or the like is hot melt extruded. Extrusion lamination method can be used.

  FIG. 5 is an explanatory view showing an example of the notch 4 and is a schematic view showing a cross section of the top seal portion 1. FIG. 5 (a) shows an example in which cuts 4 are provided that penetrate all the layers of the laminated film 10a on the front surface, and FIG. An example in which the cut 4 is provided is shown, and FIG. 5C shows an example in which the cut film 4 having a half cut is provided in the laminated film 10a on the surface. The cut 4 shown in FIG. 5 (a) is provided through the entire surface of the laminated film 10a. The cut 4 shown in FIG. 5 (b) is provided through the front surface laminated film 10a and the back surface laminated film 10b. The cut 4 shown in FIG. 5C is provided with a half cut that penetrates through the base material layer 11 and the intermediate layer 12 of the laminated film 10a on the surface and reaches the heat fusion layer 13. When the half cut is provided at a depth that does not penetrate the laminated film 10a on the surface, the half cut depth preferably penetrates at least the base material layer 11 and reaches 2/3 or more of the thickness of the intermediate layer 12, or heat It may reach the thickness of the fusion layer 13. Although the strength of the laminated film 10a on the surface of the surface of the laminated film 10a is reduced by making the cut 4 on the surface, the cut 4 is provided in the region of the top seal portion 1, so The periphery is in a state where the laminated film 10a on the front surface and the laminated film 10b on the back surface are reinforced by the top seal portion 1, and the strength reduction due to the notch 4 is supplemented by the top seal portion 1 and has a practical problem. Never come.

  The easy-open packaging bag P may be made with a filling machine while rewinding the roll, filled with the contents in-line and sealed and packaged, or after being made with an existing bag making machine, the contents are taken offline. And may be sealed and packaged. When filling the contents in-line, it is advisable to provide a cut 4 at the time of bag making. In the case of off-line, when making a bag with a bag making machine, for example, a cut 4 is formed in the top seal portion 1 and the bottom seal portion 2 is an opening, and after filling the contents from the opening, the bottom seal portion 2 is thermally bonded. And seal. The method of forming the cut 4 is preferably a laser method, but may be a method of mechanically applying with a roll blade or a flat blade having a cutting blade or a half-cut blade.

  Next, with reference to FIG. 6, the opening method, action and effect of the easy-open packaging bag P of the present invention will be described. In addition, in FIG. 6, although the structure of the laminated | multilayer film 10 is shown by the 2 layer structure by which the base material layer 11 and the heat sealing | fusion layer 13 were laminated | stacked, the base material layer 11, the intermediate | middle layer 12, and the heat sealing | fusion layer 13 are shown in order. The provided three-layer structure may be sufficient. FIG. 6 is an explanatory view showing a state in which the easy-open packaging bag P is unsealed with respect to the package body Q containing the contents 6 in the storage part 5 of the easy-open packaging bag P of one embodiment according to the present invention. The easy-open packaging bag P includes a cut 4 in the region of the top seal portion 1, and the cut 4 is formed on the laminated film 10 a on the opposite side of the laminated film 10 b on the back side where the back seal portion 3 is provided. The storage portion is provided so as to intersect with the position corresponding to the back seal portion 3 and arranged at a position closer to the outer edge 1b of the top seal portion than the inner edge 1a of the top seal portion. It is characterized by opening from the intersection 8 between the inner edge of the top seal part and the inner edge of the back seal part from the side 5 toward the side of the top seal part 1. FIGS. 6 (a) and 6 (b) show a cross section vertically cut at the position of the intersection 8 between the inner edge of the top seal portion and the inner edge of the back seal portion shown in FIG. Although the back seal portion 3 exists, FIG. 6 is simplified by omitting the description of the back seal portion 3.

  As shown in FIG. 6 (a), first, each of the centers of the packaging bodies Q centering on the back seal portion 3 of the laminated film 10a on the front surface on the storage portion 5 side and the laminated film 10b on the back surface is picked with fingers. When pulling in the opposite outer direction (arrow direction shown in FIG. 6), the pulling force concentrates at the intersection 8 between the inner edge of the top seal portion and the inner edge of the back seal portion. As a result, at the intersection 8, the inner edge of the top seal portion When the seal retreat starts toward the outer edge 1b of the top seal portion from 1a and the seal retreat reaches the notch 4, the notch 4 is not able to resist the pulling force of the laminated film 10a on the surface, and the fracture starts. An opening 7 is formed as shown in FIG. If the pulling is continued, the breaking of the laminated film 10a on the surface continues along the inner edge 1a of the top seal portion, and when the break is terminated in the vicinity of both the left and right ends of the top seal portion 1, the opening is opened as shown in FIG. A wide opening 7 is formed on the top of the easy-open packaging bag P ′. The contents 6 can be easily taken out from the opening 7.

  As described above, the easy-open packaging bag P of the present invention includes the cut 4 in the region of the top seal portion 1, and the cut 4 is opposite to the laminated film 10 b on the back surface on which the back seal portion 3 is provided. The laminated film 10a on the side surface is provided so as to intersect with the position corresponding to the back seal portion 3, and is disposed at a position closer to the outer edge 1b of the top seal portion than the inner edge 1a of the top seal portion. By adopting the configuration, the pulling force for opening that is applied to the laminated film 10 by the opening method is concentrated at the intersection 8 between the inner edge of the top seal portion and the inner edge of the back seal portion, and the top from the storage portion 5 side. Since it can be easily opened from the intersection 8 between the inner edge of the top seal part and the inner edge of the back seal part toward the seal part 1, it can be opened easily even by children and the elderly. Further, since the cut 4 is provided in the region of the top seal portion 1, the barrier property of the laminated film 10 due to the cut 4 does not affect the storage portion 5, and the barrier property can be maintained and weakened by the cut 4. Even in the laminated film 10, the cut 4 is reinforced by the laminated film 10a on the front surface of the top seal portion 1 and the laminated film 10b on the back surface, so that external force is applied to the top seal portion 1 by transportation and handling of the product. Even if there is, the cut 4 is protected and there is no fear that the easy-open packaging bag P will be damaged.

  Next, the present invention will be described in more detail with reference to examples.

[Example 1]
A biaxially stretched polypropylene film (OPP) having a thickness of 20 μm is used as the base layer 11, and an aluminum-deposited polyethylene terephthalate film (VMPET) in which aluminum is vapor-deposited on one side of a 12 μm-thick biaxially stretched polyethylene terephthalate film is used as the intermediate layer 12. Using a linear low-density polyethylene film (LLDPE) with a thickness of 25 μm as the heat-fusible layer 13, gravure printing (GR) is performed on one side of the OPP, and a coating solution of a urethane-based anchor coating agent is applied to the printed surface. After drying and providing an anchor coat layer (AC), low-density polyethylene (LDPE) obtained by thermally melting the AC surface of OPP and the aluminum vapor-deposited surface of VMPET is extruded from a T die at a thickness of 13 μm and laminated by the sandwich lamination method. And the reverse side of the aluminum vapor deposition surface of VMPET AC is provided on the side surface, and low-density polyethylene (LDPE) obtained by thermally melting the AC surface and LLDPE is extruded from a T die at a thickness of 13 μm and laminated by the sandwich lamination method. <OPP20 / GR / AC / LDPE13 / A laminated film 10 having a configuration of VMPET12 / AC / LDPE13 / LLDPE25> was produced.

  A pillow-type easy-open packaging bag P shown in FIG. 1 (outside dimension: vertical length 200 mm × horizontal length 150 mm) was prepared using the laminated film 10. The seal width of the top seal part 1, the bottom seal part 2, and the back seal part 3 was 10 mm each. The cuts 4 were 5 mm in length on the left and right sides, and were provided at positions 0.5 mm above the inner edge of the top seal portion 1.

[Comparative Example 1]
The same packaging bag as in Example 1 was prepared except that the notch 4 was not provided.

  About the easy-open packaging bag P of Example 1, when the vicinity of the center of the laminated film 10a on the front surface on the storage unit 5 side and the center of the laminated film 10b on the back surface are respectively picked with fingers and pulled in the opposite outward directions, The laminated film 10a was broken, and the laminated film 10a on the surface was torn along the inner edge of the top seal portion 1 so that the opening 7 could be easily formed. On the other hand, compared with Example 1, the comparative example 1 was not able to open easily.

P Easy opening packaging bag P 'Opened easy opening packaging bag Q Package 1 Top seal part 1a Inner edge of top seal part 1b Outer edge of top seal part 2 Bottom seal part 3 Back seal part 4 Cut 5 Storage part 6 Contents 7 Opening 8 Intersection of inner edge of top seal portion and inner edge of back seal portion 10 Laminated film 10a Laminated film on the surface 10b Laminated film on the back surface 11 Base material layer 12 Intermediate layer 13 Thermal fusion layer

Claims (2)

A pillow type packaging bag made of a single laminated film having a storage portion sealed with a top seal portion, a bottom seal portion and a back seal portion,
The back seal portion is provided on the back surface,
A cut is provided in the area of the top seal part,
The cut is provided in the laminated film on the surface opposite to the back seal portion so as to intersect with the position corresponding to the back seal portion, and the position closer to the outer edge than the inner edge of the top seal portion Are located in
An easy-open packaging bag characterized by opening from the intersection of the inner edge of the top seal part and the inner edge of the back seal part from the storage part side toward the top seal part side. The easy-open packaging bag according to claim 1, wherein the notch penetrates a laminated film on a surface opposite to the back seal portion or is a half cut.

Images