JP6364708B2 - Self-supporting packaging bag - Google Patents

Description

  The present invention relates to a self-supporting packaging bag.

  Self-supporting packaging bags, unlike metal cans and plastic molded containers, are small in resources and resource-saving, and can be reduced in volume at the time of disposal. Self-supporting packaging bags are increasingly used for refilling liquid contents such as body soaps, liquid detergents and toiletries represented by softeners into plastic containers that are used repeatedly.

  In this self-supporting packaging bag, a standing pouch type whose bottom is sealed in a ship bottom type is generally used. If the packaging material used in such a self-supporting packaging bag is insufficient, the self-supporting property may be insufficient at the time of product display, and there is room for further study.

  Therefore, for example, a seal part formed by a standing pouch type and intentionally provided in a peripheral seal part that forms the body part and bottom part of the bag or in a place adjacent to a content storage part other than the peripheral seal part. Different from the contents storage part, the side seal part provided along the content extraction path from one side seal part to the position near the tip of the spout, and the other side seal part and bottom part communicate with each other There is a self-supporting packaging bag provided with an independent filling chamber (Patent Document 1).

  However, in this self-supporting packaging bag, since the peripheral seal portion of the bottom portion is inflated by the independent filling chamber, the bottom member folded in half and sandwiched between the bottom portions cannot spread, and the self-supporting property may be impaired. is there.

  Known documents are shown below.

Japanese Patent No. 4736364

  The present invention has been made in view of the above circumstances, and is a self-supporting packaging bag in which a bottom member folded in half is sandwiched between the lower ends of the front and back films with the folded portion facing upward, and the bottom member is expanded. It is an object of the present invention to provide a self-supporting packaging bag that is held in a state in which the self-supporting property is ensured.

The invention according to claim 1 of the present invention is a self-supporting packaging bag in which a bottom member folded in half is sandwiched between the lower ends of the front and back films with the folded portion facing upward, and the peripheral edge portion is sealed. It is composed of a side film and an inner side film , and an independent filling chamber and a communication path between the independent filling chamber and the outside are provided between the outer side film and the inner side film at a position that becomes the bottom of the self-supporting packaging bag. It is the self-supporting packaging bag characterized by having.

  The self-supporting packaging bag of the present invention is configured as described above, folded in half, sandwiched between the lower ends of the front and back films with the folded portion up, and the bottom member sealed at the peripheral edge spread by the independent filling chamber It is held in a state, and independence can be ensured.

Invention, ship sandwiched portion of front Kisoko member is sealed to ship-bottom-according to claim 2 of the present invention
2. The self-supporting packaging bag according to claim 1, wherein the self-supporting packaging bag is a bottom-type seal portion, and a filling port is provided in the bottom-type seal portion .

In the present invention , since the filling port is provided in the ship bottom type seal portion, the independent filling chamber can be filled with the filling material from the filling port .

The invention according to claim 3 of the present invention, the filling port is in self-supporting packaging bag according to claim 2, characterized in Rukoto such a through hole penetrating the front film or backing film and the inner surface side film is there.

The present invention, the filling port, since a through hole that penetrates the front film or backing film and the inner surface side film can Rukoto providing the filling port by a technique such as half blanking.

The invention according to claim 4 of the present invention is provided with an easy-cutting mechanism for cutting the independent filling chamber , wherein the self-supporting packaging bag according to any one of claims 1 to 3 is provided. It is.

In the present invention, since the self-supporting packaging bag is provided with an easy cutting mechanism for cutting the independent filling chamber, when the container is discarded, the independent filling chamber can be cut and the filling can be taken out. It can be stored and discarded .

  The self-supporting packaging bag of the present invention is folded in half, sandwiched between the bottom ends of the front and back films with the folded portion up, and the bottom member with the peripheral edge sealed is held in an expanded state to ensure self-supporting properties. .

It is explanatory drawing which showed typically an example of the self-supporting packaging bag of this invention by the front. It is explanatory drawing which showed typically the state which expanded the independent filling chamber in an example of the self-supporting packaging bag of this invention in the XX cross section of FIG. It is explanatory drawing which showed typically the independent filling chamber of the bottom member of the other example of the self-supporting packaging bag of this invention. It is explanatory drawing which showed typically a mode that the filling material was filled in the independent filling chamber of an example of the self-supporting packaging bag of this invention.

Hereinafter, embodiments for carrying out the present invention will be described.
FIG. 1 is an explanatory view schematically showing an example of the self-supporting packaging bag of the present invention on the front side. FIG. 2 is an explanatory view schematically showing a state where the independent filling chamber is inflated in an example of the self-supporting packaging bag of the present invention, in the XX section of FIG. 1. FIG. 3 is an explanatory view schematically showing the shape of the independent filling chamber of the bottom member of another example of the self-supporting packaging bag of the present invention.

  As shown in the front view of FIG. 1 and the cross-sectional view of FIG. 2, the self-supporting packaging bag 100 of the present example has a folded bottom member 3 at the lower end of the superposed front film 1 and back film 2. The peripheral part is sealed.

  In the self-supporting packaging bag 100 of this example, the bottom part into which the bottom member 3 is inserted is sealed at the periphery with a ship bottom mold, and is a ship bottom mold seal part 4, which is in a standing pouch form. In addition, the notch part 5 is provided in the both ends of the bottom member 3 folded in half, and the front film 1 and the back film 2 are mutually sealed by this notch part 5, and the both ends of a bottom part are not opened. It has become.

  The bottom member 3 is composed of a laminated film composed of at least an outer surface side film 3a and an inner surface side film 3b, and a non-laminated portion is provided at a position that becomes the bottom of the self-supporting packaging bag 100. In addition, an independent filling chamber 6 separate from the contents storage portion is provided. In this example, the independent filling chamber 6 is provided on substantially the entire surface of the bottom member 3 excluding the peripheral seal.

  In this example, the independent filling chamber 6 is provided on substantially the entire surface of the bottom member 3 excluding the peripheral seal. However, the independent filling chamber 6 may be provided on the entire surface of the bottom member 3 excluding the peripheral seal. For example, like the bottom member 31 in FIG. 3, the bottom member 31 is formed by combining a plurality of elongated rods and orthogonal rods connecting them in the direction in which the bottom member 31 extends in a portion excluding the peripheral seal. good.

  Further, the ship bottom type seal portion 4 is provided with a communication path 7 communicating with the independent filling chamber 6 and a filling port 8 for connecting the communication path 7 to the outside and filling the independent filling chamber 6 with a filling material. Yes. Similarly to the independent filling chamber 6, the communication path 7 is an unstacked portion. The filling port 8 may be sealed by sticking a sealing label provided with an adhesive or a sealant layer after filling the independent filling chamber 6 with a filling material.

  In this way, by filling and filling the independent filling chamber 6 with the filler, the bottom member 3 folded in half is opened to form the bottom of the self-supporting packaging bag 100 to ensure self-supporting. Can do.

  A gas such as air or nitrogen gas can be used as the filling for expanding the independent filling chamber 6. Moreover, liquids, such as water and oil, can be used. Furthermore, solids such as inorganic powder and foamed resin can be filled together with these.

  In particular, when the independent filling chamber 6 is filled with a gas, when the contents are impacted by a drop such as liquid, the pressure generated by the impact is directed in all directions as it is in the liquid. The filled gas can change its volume to relieve pressure. Therefore, resistance to impacts such as dropping is improved.

  The side seal portion 9 of the peripheral portion seals is provided with a notch 10 for opening the self-supporting packaging bag 100. The notch 10 is provided in one side seal portion 9 in this example, but may be provided in both the left and right side seal portions 9 and 9. Moreover, you may provide the half cut line for opening from one side seal part to the both ends of the other side seal part.

  The ship bottom type seal portion 4 is also provided with a notch 11 for cutting and opening the independent filling chamber 6. In this example, a notch is provided, but other easy cutting mechanisms such as a half-cut line may be provided. Thereby, when discarding the used self-supporting packaging bag 100, the independent filling chamber can be crushed, the volume can be reduced, and the self-supporting packaging bag 100 can be discarded.

  The front film 1 and the back film 2 are composed of a laminated film of an outer base material layer and an inner sealant layer. A barrier layer can also be provided between the base material layer and the sealant layer. Other intermediate layers can also be provided.

  The bottom member 3 includes at least an outer surface side film 3a and an inner surface side film 3b, and the outer surface side film 3a includes a base material layer. In addition, a barrier layer can be provided on the base material layer. Other intermediate layers can also be provided.

  The inner surface side film 3b can be a single sealant layer. However, since the sealant layer may be expanded when it is inflated, a second base material layer is preferably provided and laminated with the sealant layer. . A barrier layer can be provided on the second base material layer. Other intermediate layers can also be provided.

  As the base material layer, the second base material layer, and other intermediate layers, polyesters such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polyethylene (PE), polypropylene (PP ), Polyolefins such as polystyrene (PS), polyamides (PA) such as nylon-6 and nylon-66, polycarbonate (PC), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride A stretched or non-stretched film such as (PVDC), polyvinyl alcohol (PVA), ethylene-vinyl alcohol copolymer (EVOH), polyether sulfone (PES), polymethyl methacrylate (PMMA) can be used.

  The sealant layer includes low density polyethylene resin (LDPE), medium density polyethylene resin (MDPE), high density polyethylene resin (HDPE), linear low density polyethylene resin (LLDPE), polypropylene resin (PP), and ethylene-propylene. Polymer (EP), ethylene-α olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-methacrylic acid ester copolymer, ethylene-acrylic acid ester A resin such as a copolymer, an ionomer resin, an ethylene-vinyl acetate copolymer (EVA), or a film obtained by forming a film of these resins can be used.

  The barrier layer can be provided with a metal foil such as an aluminum foil, a metal vapor deposition layer such as aluminum, or an inorganic oxide vapor deposition layer such as aluminum oxide, silicon oxide, tin oxide, or magnesium oxide.

  The method for laminating these layers is not particularly limited. It can be laminated by dry lamination, extrusion lamination (including sandwich lamination), etc., which are usually used.

  In addition, since the lamination | stacking between the outer surface side film 3a and the inner surface side film 3b of the bottom member 3 provides a non-laminated part in order to provide an independent filling chamber and the communication path 7, an adhesive is used in a pattern except a non-laminated part. It is simple and preferable to apply and laminate by dry lamination.

  Moreover, a printing layer can be provided in the front surface of a laminated | multilayer film, or between layers. The printing method is not particularly limited, and can be performed by gravure printing, flexographic printing, silk printing, ink jet printing, or the like.

  Using the front film 1, the back film 2, and the bottom member 3 as described above, the self-supporting packaging bag 100 of this example can be manufactured as follows.

  A conventional standing pouch bag making machine can be used to manufacture the self-supporting packaging bag 100 of this example. A self-supporting packaging bag 100 made by a bag making machine is connected to the outside through a communication path 7 and a filling port 8 for filling a filling material in the independent filling chamber 6 is provided.

  In this example, the filling port 8 is provided by a method such as half-cutting a through-hole penetrating at least the surface film and the inner surface side film 3b of the bottom member 3. Instead of the through hole, a notch may be used as the filling port 8, or the filling port 8 may be formed by another method.

  From this filling port 8, gas, liquid, or a solid such as inorganic powder or foamed resin is filled and inflated, and a sealing label provided with an adhesive or a sealant layer is attached to the filling port 8. Close and inflate the independent filling chamber 6.

  When filling gas or the like, as shown in FIG. 4, the filling nozzle 12 is pressed against the filling port 8, pressed from the back with the pressing plate 13, and filled with gas or the like from the filling nozzle. Can be inflated with filler.

  Moreover, as a method of inflating the independent filling chamber 6, it is also possible to fill with a chemical or the like that generates gas. Furthermore, without providing the communication path 7 and the filling port 8, a material that generates gas is applied in advance to the inner surface of the independent filling chamber 6 of the bottom member 3, and gas is generated during bag making or after bag making. It can also be inflated.

  Specific examples of the present invention will be described below.

  As a laminated film for the front film 1 and the back film 2, prepare a stretched polyethylene terephthalate film 25 μm for the outer base layer, a stretched nylon film 15 μm for the intermediate layer, and an unstretched low-density polyethylene film 60 μm for the inner sealant layer. Each film was sequentially laminated by dry lamination using an adhesive.

  Next, as the inner surface side film 3b of the bottom member 3, a stretched nylon film 15 μm of the second base material layer and an unstretched low density polyethylene film 60 μm of the sealant layer were prepared and laminated by dry lamination using an adhesive.

  As the outer surface side film 3a of the bottom member 3, a stretched polyethylene terephthalate film 25 μm is used, and the adhesive layer is coated on the surface of the outer surface side film 3a by a pattern coating, except for the portion where the connecting path 7 and the independent filling chamber 6 of the bottom member 3 are provided. It apply | coated and laminated | stacked on the surface of the stretched nylon film of the inner surface side film 3b, and the laminated | multilayer film for the bottom members 3 was created.

  The laminated film for the front film 1 and the back film 2 and the laminated film for the bottom member 3 are each slitted for bag making, bag-made with a standing pouch bag-making machine, and through holes are provided by half-punching processing. 8 was prepared, and a self-supporting packaging bag 100 as shown in FIG. 1 was created in which the top seal portion at the upper end was not sealed and was an opening.

  As shown in FIG. 4, the self-supporting packaging bag 100 is pressed with the filling nozzle 12 against the filling port 8 and pressed with a pressing plate 13 from the back, filled with nitrogen gas from the filling nozzle 12, and the independent filling chamber 6 is expanded. The self-supporting packaging bag 100 was created. At this time, a sealing label may be stuck on the filling port 8 to close it.

  This self-supporting packaging bag 100 was filled with liquid shampoo, the opening was sealed, and a top seal was provided for sealing.

  This filled self-supporting packaging bag 100 is held in a state where the bottom member 3 is expanded by the independent filling chamber 6, so that the self-supporting property is stably secured. Moreover, even if it dropped on the concrete surface from a height of 1.2 m, it was not easily broken.

For disposal after use, the volume can be reduced to flattening by tearing from the notch 11 of the easy-cutting mechanism, cutting the independent filling chamber 6, and removing the nitrogen gas in the filling of the independent filling chamber 6. did it.

DESCRIPTION OF SYMBOLS 100 ... Self-supporting packaging bag 1 ... Front film 2 ... Back film 3, 31 ... Bottom member 3a ... Outer surface side film 3b ... Inner surface side film 4 ... Ship bottom type seal part 5 ... Notch part 6 ... Independent filling chamber 7 ... Communication path 8 ... Filling port 9 ... Side seal part 10, 11 ... Notch 12 ... Filling nozzle 13 ... Holding plate

Claims (4)

Folded the bottom member, sandwiching the folded portion at the lower end of the front and back of the film in the above, a self-supporting packaging bag sealing a peripheral portion, the bottom member is composed of a outer face film and the inner surface side film, free-standing A self-supporting packaging bag characterized in that an independent filling chamber and a communication path between the independent filling chamber and the outside are provided between the outer film and the inner film at a position to be the bottom of the packaging bag .   2. The self-supporting packaging according to claim 1, wherein a portion sandwiched between the bottom members is a bottom seal portion sealed with a bottom shape, and a filling port is provided in the bottom shape seal portion. bag.   The self-supporting packaging bag according to claim 2, wherein the filling port includes a through-hole penetrating the front film or back film and the inner film.   The self-supporting packaging bag according to any one of claims 1 to 3, further comprising an easy-cutting mechanism for cutting the independent filling chamber.

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