JP6939200B2 - Packaging bag - Google Patents

Description

The present invention relates to a packaging bag. In particular, the present invention relates to a packaging bag made of a laminate based on a plastic film, which is convenient for taking out and resealing the contents.

Conventionally, a packaging bag made of a laminate having a sealant layer on a plastic film as a base material is not limited to the case where a single layer of a plastic film is used except for the sealant layer, but also other films, resin layers, metal foils, etc. One of the features of the laminated body is that it is possible to design the layer structure and material according to the required quality of the contents, and it is widely used for various purposes.

In particular, packaging bags made of a laminate having a sealant layer on a plastic film as a base material are widely used in a wide range of fields such as foods, but are more advantageous than glass bottles and cans in terms of performance and cost. ..

In addition, recently, there has been a movement to reduce waste from the viewpoint of environmental protection by stopping disposable plastic and glass bottles, and packaging made of a laminate having a sealant layer using a plastic film as a base material. The demand for bags is especially increasing.

However, in pillow-type packaging bags such as potato chips packaging bags, since a laminate based on a plastic film is used, the flexibility of the pillow-type packaging bag is such that it lacks independence and cannot be stacked. In some cases, the application was limited due to reasons such as difficulty in putting it in a holder.

Alternatively, in a paper cup container, it can be put in an automobile cup holder, but it is difficult to seal it when resealing because it is inevitable that a step is generated at the part where the third seam of the cup and the top curl part overlap. be.

Further, if a paper container made of paper is used as a base material, for example, when food comes into direct contact with the inner surface, used paper cannot be used and the price becomes high. In addition, when the content contains oil, it is necessary to use oil-resistant paper because it is necessary to prevent oil bleeding, which is also a factor that increases the price. Furthermore, the reality is that even oil-resistant paper is not perfect against oil bleeding.

Patent Document 1 proposes a packaging bag based on a plastic film. Regarding opening, although it is a proposal to achieve both easy opening and prevention of inadvertent opening, it is self-supporting and resealable. No special consideration was given to.

Japanese Unexamined Patent Publication No. 2016-11214

The present invention has been made in view of such a situation, and is a packaging bag made of a laminate having a sealant layer as a base material of a plastic film, which is self-supporting, easy to open, and convenient for taking out the contents. It is an object of the present invention to provide a packaging bag having resealability.

As a means for solving the above problems, the invention according to claim 1 is a packaging bag made of a laminate having a sealant layer as a base material of a plastic film.
The packaging bag has a hexahedral shape having a sealing portion, which is composed of a body portion, a top surface and a bottom surface, and has a sealing portion.
The hexahedron is sealed by a seal portion on both left and right sides of the body portion and a front seal portion extending in a direction perpendicular to the seal portion continuously from the seal portions on both left and right side surfaces.
The seal portions on the left and right side surfaces are fixed by reaching the back surface from the left and right side surfaces of the body portion and covering the rear half of the left and right side surfaces of the body portion and a part of the back surface of the body portion.
The front seal portion is folded downward at the upper end portion of the body portion, and is fixed so as to cover the upper part of the front surface of the body portion and the upper front half of the left and right side surfaces of the body portion.
The front seal portion and the top surface are provided with a continuous scheduled opening line from the lower end portion of the front seal portion to the top surface.
By opening the scheduled opening line, it is possible to form an opening on the top surface.
When the packaging bag is opened, the front seal portion is sandwiched between both seal portions continuous from the left and right side surfaces covering a part of the back surface of the body portion and the laminate on the back surface of the body portion. It is a packaging bag characterized in that it can be temporarily fixed.

According to the present invention, in a packaging bag made of a laminate having a sealant layer as a base material of a plastic film, the packaging bag has self-supporting property, is easy to open, is convenient for taking out the contents, and has resealing property. It is possible to provide packaging bags.

FIG. 1 is a schematic perspective view for explaining the designation of each surface of the hexahedron with respect to one embodiment of the packaging bag according to the present invention. FIG. 2 is a schematic perspective view of the packaging bag viewed from diagonally left front for explaining one embodiment of the packaging bag according to the present invention. FIG. 3 is a schematic perspective view for explaining a state before opening of one embodiment of the packaging bag according to the present invention. FIG. 4 is a schematic perspective view for explaining an embodiment of the packaging bag according to the present invention and an opened state. FIG. 5 is a schematic perspective view for explaining a state in which one embodiment of the packaging bag according to the present invention is viewed from the back surface. FIG. 6 is a schematic perspective view for explaining a state in which one embodiment of the packaging bag according to the present invention is opened and the top surface portion is temporarily fixed to the back surface as viewed from the back surface. FIG. 7 is a schematic perspective view for explaining a state in which one embodiment of the packaging bag according to the present invention is opened and the top surface portion is temporarily fixed to the back surface. FIG. 8 is a schematic perspective view for explaining a state in which the packaging bag according to the present invention is opened and then resealed.

Hereinafter, the present invention will be described in detail step by step with reference to FIGS. 1 to 8. However, the present invention is not limited to the examples shown here. The present invention is limited by the claims.

FIG. 1 is a schematic perspective view for explaining the designation of each surface of the hexahedron with respect to one embodiment of the packaging bag according to the present invention.

The packaging bag (100) according to the present invention is a packaging bag (100) made of a laminate having a sealant layer on a plastic film as a base material, and is composed of a body portion, a top surface and a bottom surface, and is made by a seal portion. It has a hexahedral shape.

In the example shown in FIG. 1, the surfaces constituting the hexahedron of the packaging bag (100) are the top surface (1), the bottom surface (2), the left side surface of the body (3), the right side of the body (4), and the body. There are six sides, the front surface (5) and the back surface (6) of the body. Further, the hexahedron is sealed by both the left side seal portion and the right side seal portion (7) of the body portion and the front seal portion (9) which is continuously sealed from both seal portions in the right angle direction. There is.

The left side sealing portion of the body portion is a heat-sealed laminate of a laminated body continuous from the front surface (5) of the body portion and a laminated body continuous from the back surface (6) of the body portion on the left side surface (3) of the body portion. Similarly, the right side sealing portion (7) of the body heat seals the laminated body continuous from the front surface (5) of the body and the laminated body continuous from the back surface (6) of the body on the right side surface (4) of the body. It was done.

In the example shown in FIG. 1, the front seal portion (9) is formed from a laminated body continuous from the top surface (1), the front surface of the body portion (5), the left side surface of the body portion (3), and the right side surface of the body portion (4). It is a heat-sealed continuous laminate.

Further, in the example shown in FIG. 1, the front seal portion (9) is folded downward at the upper end portion of the body portion to cover the upper part of the front surface (5) of the body portion and the upper front half of the left and right side surfaces of the body portion. It is fixed. In FIG. 1, only the upper part of the front surface (5) of the body portion and the upper front half of the right side surface (4) of the body portion are visible.

The packaging bag (100) may be provided with a display portion (20). Information on contents and products, pictures and photographs for improving design, logo marks, distribution and inventory, as well as barcodes for sales management can be displayed on the display portion (20). .. The display portion (20) may be visible from the outside, and the position and number in the packaging bag may be appropriately determined according to the purpose.

FIG. 2 is a schematic perspective view of the packaging bag viewed from diagonally left front for explaining one embodiment of the packaging bag according to the present invention.

Similarly to the right side surface (4) of the body portion, the rear half of the left side surface of the body portion of the hexahedron has the left side surface (3) covered with the left side surface seal portion (8). The front seal portion (9) is folded downward at the upper end portion of the body portion as described above, and is fixed so as to cover the upper part of the front surface (5) of the body portion and the upper front half of the left and right side surfaces of the body portion. .. In FIG. 2, only the upper part of the front surface (5) of the body portion and the upper front half of the left side surface (3) of the body portion are visible.

FIG. 3 is a schematic perspective view for explaining a state before opening of one embodiment of the packaging bag according to the present invention.

The front seal portion (9) and the top surface (1) are provided with continuous scheduled opening lines (10) from the lower end portion of the front seal portion (9) to the top surface (1), and arrows (11) in the drawing. The front seal portion (9) can be pulled up with a finger in the direction of to open the seal.

The scheduled opening line (10) has an easy-opening structure, for example, by providing a half-cut in the laminate, tearing it by a notch, or utilizing the molecular orientation of the plastic film in the laminate. This allows the packaging bag (100) to be easily opened with fingers or the like.

FIG. 4 is a schematic perspective view for explaining an embodiment of the packaging bag according to the present invention and an opened state.

It is possible to form an opening (13) on the top surface (1) by opening a continuous scheduled opening line (10) provided from the lower end of the front seal portion (9) to the top surface (1). .. The contents (14) stored in the packaging bag (100) can be taken out from the opening (13) by fingers or the like. In particular, by making the area of the opening (13) large, it is easy to take out.

The opening can be performed by pulling and moving the laminated body (16) on the top surface continuous with the front seal portion (9) in the direction of the arrow (12) in the drawing. At this time, the cut front seal portion (9) and the laminated body (16) on the top surface are in a continuous state.

FIG. 5 is a schematic perspective view for explaining a state in which one embodiment of the packaging bag according to the present invention is viewed from the back surface.

A continuous portion (19) from the left side seal portion (8) and the right side seal portion (7) wraps around the back surface (6) of the body portion from both the left and right side surfaces, and a part of the back surface (6) of the body portion. Is covered, and each is fixed to the back surface (6) of the body by partial adhesion (15). In the example of FIG. 5 shown here, the partial adhesion (15) is circular, but the shape may be any shape and number as long as it has a fixing effect.

FIG. 6 is a schematic perspective view for explaining a state in which one embodiment of the packaging bag according to the present invention is opened and the top surface portion is temporarily fixed to the back surface as viewed from the back surface (100). When the package is opened along the scheduled opening line (10), the laminated body (16) on the top surface continuous with the front seal portion (9) is peeled off. The cut-out front seal portion (9) and the laminated body (16) on the top surface continuous with the cut front seal portion (9) interfere with the removal of the contents as it is.

Therefore, in the packaging bag (100) according to the present invention, the left side sealing portion (8) covering a part of the back surface (6) of the body portion and the continuous portion (19) from the right side sealing portion (7) , Can be sandwiched between the laminated body on the back surface (6) of the body and temporarily fixed.
This temporary fixing can be performed by sandwiching the cut front seal portion (9) and the laminated body (16) on the top surface continuous thereto and moving it in the direction of the arrow (17) in the rear drawing.

By this temporary fixing, the contents can be easily taken out from the packaging bag (100), and the laminated body (16) on the top surface continuous with the front seal portion (9) is not bulky and does not interfere with the taking out of the contents.

FIG. 7 is a schematic perspective view for explaining a state in which one embodiment of the packaging bag according to the present invention is opened and the top surface portion is temporarily fixed to the back surface.

As described above, in the packaging bag according to the present invention, the contents (14) can be easily taken out from the packaging bag (100) by temporarily fixing the laminated body (16) on the top surface continuous to the front seal portion (9). Therefore, the laminated body (16) on the top surface continuous with the front seal portion (9) is not bulky and does not interfere with the removal of the contents. In addition to being easy to use, it also has the advantage of giving a good impression in terms of appearance.

Further, even when a part of the contents is attached to the inside of the packaging bag of the laminated body (16) on the top surface, there is no risk of soiling the fingers at the time of taking out.

FIG. 8 is a schematic perspective view for explaining a state in which the packaging bag according to the present invention is opened and then resealed.

The example shown here is a view when the packaging bag (100) is resealed after being opened, and the laminated body (16) on the top surface continuous with the front seal portion (9) is shown by the arrow (18) in the drawing. It moved in the direction and returned to the position before opening.

Since this resealing is a resealing after opening once, it cannot be returned to the sealed state before opening, but the laminated body (16) on the top surface continuous with the front sealing portion (9) is returned to the original position. By returning it, it is possible to prevent the invasion of dust and foreign matter, and it is possible to reseal it effectively for suppressing drying.

Further, in the resealed state, the front seal portion (9) is suitable because the two laminated bodies are heat-sealed, so that the front seal portion (9) does not easily turn up while hanging from the top surface (1). ..

The packaging bag (100) according to the present invention has a flat bottom surface (2), can take a large area of the bottom surface (2), and is stable, as shown in the drawings and described step by step. Can be independent.

Further, since the heat seal portion is relatively wide and is provided so as to wrap around the body portion, the portion becomes thick and is effective as a reinforcing material for the laminated body, and the packaging bag (100) is stable. It is more effective for independence.

As described above, according to the present invention, in a packaging bag made of a laminate having a sealant layer as a base material of a plastic film, the packaging bag is self-supporting, easy to open, convenient to take out the contents, and resealed. It is possible to provide a packaging bag having sex.

The packaging bag according to the present invention does not impose any special limitation other than those shown in the claims regarding the composition of the laminate to be used, but is generally a material composition for realizing the packaging bag (100) according to the present invention. Add a description of what can be used in.

As described above, the packaging bag (100) according to the present invention is made of a laminate having a plastic film as a base material and having a sealant layer. The plastic film is a film made of a polymer resin composition, for example, polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide (nylon-6, nylon-66, etc.), Polyethylene or the like can be used and is appropriately selected according to the application.

In particular, when polypropylene or polyethylene terephthalate is used as a plastic film, it is more preferable in terms of film strength and price. In addition, when a stretched polyamide film is used, it is possible to impart toughness against piercing and impact resistance to the laminated body.

Further, the plastic film can be laminated with another layer via an adhesive layer to form a laminated body. The layer structure, material structure, thickness, etc. of the laminate can be appropriately designed according to the required quality for the packaging material.

Further, for example, for the purpose of improving the storage stability of the contents, if necessary, an opaque layer such as a colored film that shields ultraviolet rays can be provided in the laminate. Alternatively, a gas barrier layer can be provided in the laminate. For example, a gas barrier film having a gas barrier layer provided on the surface of the plastic film can be used. A metal foil such as aluminum is also effective as a gas barrier layer.

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

In the case of a gas barrier film, the gas barrier layer can be composed of a vapor-deposited layer and a coating layer of an inorganic compound. After providing an anchor coat on the plastic film, the vapor-deposited layer and the coating layer are sequentially provided.

For example, urethane acrylate can be used for the anchor coat layer of the gas barrier film. For the formation of the anchor coat layer, a coating method in which a coating material in which a resin is dissolved in a solvent is applied by a printing method such as gravure coating can be used, or a coating film can be formed by using a generally known coating method.

As a method for forming the vapor deposition layer, an inorganic compound such as SiO or AlO can be coated on a plastic film provided with an anchor coat layer by a vacuum vapor deposition method to form an inorganic compound layer by the vacuum vapor deposition method. .. Incidentally, the thickness of the thin-film deposition layer is preferably 15 nm to 30 nm.

As a method for forming the coating layer, an aqueous solution or water / alcohol containing at least one of a water-soluble polymer, (a) one or more alkoxides or hydrolysates thereof, or both, or (b) tin chloride. A coating agent containing a mixed aqueous solution as a main component is applied onto the film and dried by heating to form an inorganic compound layer by a coating method, which can be used as a coating layer. At this time, by adding a silane monomer to the coating agent, it is possible to improve the adhesion with the anchor coat layer.

The inorganic compound layer has a gas barrier property only by the coating film by the vacuum vapor deposition method, but the coating layer which is the inorganic compound layer by the coating method is formed by superimposing on the vapor deposition layer which is the inorganic compound layer by the vacuum vapor deposition method to form a gas barrier layer. be able to.

By combining these two layers, a reaction layer of both layers is formed at the interface between the inorganic compound layer by the vacuum vapor deposition method and the inorganic compound layer by the coating method, or the inorganic compound layer by the coating method becomes an inorganic compound layer by the vacuum vapor deposition method. A dense structure is formed by filling and reinforcing defects or micropores such as pinholes, cracks, and grain boundaries that occur.

Therefore, the gas barrier film has higher gas barrier properties, moisture resistance, and water resistance, and has flexibility to withstand deformation due to an external force, so that it can be suitable as a packaging material.

Further, when SiO is used as the gas barrier layer, for example, the coating film is transparent, so that the contents can be visually seen from the outside of the packaging material. These may be used properly according to the application and the required quality.

The sealant layer makes it possible to stack two laminated bodies so that the sealant layers face each other, heat and pressurize the sealant layers, and heat-seal them to adhere them to each other to form a bag in a packaging bag.

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

To form the sealant layer, a molten resin can be formed by using an extruder or the like to form a layer on the laminate. Alternatively, it is also possible to form a sealant layer on the surface of the laminated body by laminating a material that has been formed into a film in advance by laminating.

As shown in the examples shown in FIG. 1 and the subsequent figures, the plastic film is used for the purpose of improving the image of the display unit (20) as a product, displaying necessary information about the contents, and improving the design. Can be provided by printing on a layer that can be seen from the outside of the packaging bag in the laminate based on the above. It may be provided on the outermost layer of the packaging bag.

Here, the printing method and the printing ink are not particularly restricted, but among the known printing methods, printability on a film, design such as color tone, adhesion, safety as a food container, etc. are selected. If it is taken into consideration, it may be appropriately selected.

For example, a gravure printing method, an offset printing method, a gravure offset printing method, a flexographic printing method, a silk screen printing method, an inkjet printing method, or the like can be used. Above all, the gravure printing method can be preferably used in terms of productivity and high definition of the pattern.

As described above, according to the present invention, in a packaging bag made of a laminate having a sealant layer as a base material of a plastic film, the packaging bag is self-supporting, easy to open, convenient to take out the contents, and resealed. It is possible to provide a packaging bag having sex.

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

For snack foods, a conventional confectionery container and a packaging bag according to the present invention were compared.
As Example 1, a packaging bag according to the present invention is used. In Comparative Examples 1 to 3, those conventionally used as confectionery containers were taken up.

<Example 1>
The material composition of the laminated body used in the packaging bag according to the present invention is as follows.
From the outside of the packaging bag
Polyethylene terephthalate film (thickness 12 μm) / aluminum foil (thickness 7 μm) / linear low-density polyethylene (thickness 30 μm)
The shape is
(Bottom) 80 mm square x (Height) 92 mm
And said.

<Comparative example 1>
It is a pillow pouch that has been used conventionally.

<Comparative example 2>
It is a conventionally used paper cup container.

<Comparative example 3>
It is a conventionally used paper box.

The evaluation items were the following 11 items.
Transport efficiency, independence, loadability, display, material use area, sealability, price, openability, ease of eating, resealability after opening, easy disposal.

Evaluation method For each evaluation item,
〇: Good △: Yes ×: Not possible.

As for the comprehensive evaluation, for all the evaluation items, those without the evaluation of (×: Impossible) were marked as 〇 in the comprehensive evaluation.

The evaluation results are shown in Table 1.

As is clear from the evaluation results shown in Table 1 and the comprehensive evaluation based on the evaluation results, the packaging bag according to the present invention (Example 1) is superior to the conventional packaging container (Comparative Examples 1 to 3). , It was possible to verify that the problem according to the present invention can be solved.

1 ... Top surface 2 ... Bottom surface 3 ... Body left side 4 ... Body right side 5 ... Body front 6 ... Body back 7 ... Right side seal 8・ ・ ・ Left side seal part 9 ・ ・ ・ Front seal part 10 ・ ・ ・ Scheduled opening line 11 ・ ・ ・ Arrow 12 ・ ・ ・ Arrow 13 ・ ・ ・ Opening 14 ・ ・ ・ Contents 15 ・ ・ ・ Partial adhesion 16・ ・ ・ Laminated body on the top surface 17 ・ ・ ・ Arrow 18 ・ ・ ・ Arrow 19 ・ ・ ・ Continuous part 20 from the side seal part 20 ・ ・ ・ Display part 100 ・ ・ ・ Packaging bag

Claims (1)

A packaging bag made of a laminate having a sealant layer on a plastic film as a base material.
The packaging bag has a hexahedral shape having a sealing portion, which is composed of a body portion, a top surface and a bottom surface, and has a sealing portion.
The hexahedron is sealed by a seal portion on both left and right sides of the body portion and a front seal portion extending in a direction perpendicular to the seal portion continuously from the seal portions on both left and right side surfaces.
The seal portions on the left and right side surfaces are fixed by reaching the back surface from the left and right side surfaces of the body portion and covering the rear half of the left and right side surfaces of the body portion and a part of the back surface of the body portion.
The front seal portion is folded downward at the upper end portion of the body portion, and is fixed so as to cover the upper part of the front surface of the body portion and the upper front half of the left and right side surfaces of the body portion.
The front seal portion and the top surface are provided with a continuous scheduled opening line from the lower end portion of the front seal portion to the top surface.
By opening the scheduled opening line, it is possible to form an opening on the top surface.
When the packaging bag is opened, the front seal portion is sandwiched between both seal portions continuous from the left and right side surfaces covering a part of the back surface of the body portion and the laminate on the back surface of the body portion. A packaging bag characterized by being temporarily fixable.

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