JP2021059344A - Packaging bag - Google Patents

Abstract

To provide a packaging bag capable of refilling stably by making it easy to hold the packaging bag in a refillable posture, in a large-capacity refillable packaging bag.SOLUTION: Provided is a packaging bag in which a storage part (18) is formed by facing sealant surfaces of a front film part (11) and a rear film part (12) each other and fusing peripheral edges, and a pourable opening (2) is provided on the peripheral edges near corners of an upper side and a lateral side. The packaging bag has a grip part (141) in which the front film part and the rear film part are fused, at least at one portion in the storage part inside separated from an outer end part of a lateral side seal part or a lateral side fold end part, that is a position along a lateral side farther from the opening, of left and right lateral sides.SELECTED DRAWING: Figure 1

Description

The present invention relates to a packaging bag that stores liquids and the like and is easy to refill in a pouring container.

Containers for storing toiletry products such as liquid detergents and softeners, and foods such as cooking oil and instant coffee are easy-to-use containers for pouring, such as plastic bottles and glass bottles, and a pump for pouring is attached. Containers are used. These pouring containers have a solid structure and are expensive because they come with a pump, so they can be used repeatedly when the contents are gone. A refillable packaging bag for refilling such a pouring container with its contents is sold separately.

For example, as a refillable packaging bag for storing fluid contents such as liquid, it is possible to easily and safely refill the contents into a dedicated container, and at the same time, it is inexpensive and the empty bag is not bulky. It is desirable that the disposal process after use can be easily performed. For this reason, packaging bags in which an opening for pouring is provided in a part of the upper part of the bag have come to be widely used.

In order to improve efficiency, such refillable packaging bags have been increased in capacity by 1 liter or more so that they can be filled many times, and are made of tough materials and have spouts that can be opened and closed. Correspondence is progressing.
The capacity of the refillable packaging bag has increased and the weight at full filling has increased. However, since the refillable packaging bag is a packaging bag, it is necessary to hold the container with the opening facing downward at the time of refilling. However, since it is a packaging bag, there are problems such as difficulty in grasping, difficulty in holding the packaging bag in a refilling posture, and difficulty in holding the packaging bag during transportation.

For the above problems, for example, in Patent Document 1,
On the outside of the content storage space, two synthetic resin sheets have a seal portion that is heat-sealed with each other, and a finger hook hole is raised by raising a tongue piece formed by making a cut in this seal portion. In the pouch container in which the tongue piece is formed, the pouch container is proposed in which the sealed portion is provided with an unsealed region surrounding only the base end portion of the tongue piece.

In this pouch container, an example in which a finger hook hole is formed in the vicinity of the upper side where the spout is provided is described, and there is no particular problem during transportation in which only hanging is required. However, there is a problem that it is difficult to pour at an angle while supporting a large-capacity refill container at the time of refilling by simply passing a finger through the finger hook hole at such a position.

Further, in Patent Document 2,
The lower part of the bag is formed between the lower parts of the wall surface films on the front and rear surfaces, and the bottom surface film is folded inward and inserted, and the peripheral portion is heat-sealed to have a gusset portion. In a bag formed by heat-sealing the edge portions on both sides of the wall surface film with a side seal portion, the lower gusset portion is heat-sealed with a seal pattern having a shape that imparts independence, and the upper portion of the bag is heat-sealed. When the spout made of a plastic molded body is placed upright at one of the left and right corners, the angle formed by the center line of the spout with respect to the horizontal line is An enlarged seal for forming a handle portion above the side seal portion on the side where the spout is not joined and is joined so as to face diagonally outward upward or vertically upward at an angle in the range of 45 ° to 90 °. We are proposing a self-supporting bag characterized in that a portion is provided and a hole for holding the bag is provided in the enlarged seal portion.

This self-standing bag also has no particular problem during transportation because a finger hook hole is formed, but has a problem that it is difficult to pour during refilling.

Further, in Patent Document 3,
A self-supporting packaging bag having a pair of opposing film portions.
A seal portion for sealing the pair of film portions is formed on the outer edge portion of the pair of film portions, and the seal portion is a first seal portion extending in the vertical direction on both side portions of the pair of film portions. A second seal portion that bends and extends inward in the width direction of the pair of film portions from the upper end portion of the first seal portion, and the first seal portion has a seal width changing portion that changes the seal width. A recess is formed on the outside of the bent portion to which the first seal portion and the second seal portion are connected, and a recess is formed inside the pair of film portions. A lower concave side extending from one seal portion in a direction inclined inward in the width direction of the pair of film portions with respect to the extending direction of the first seal portion, and from the lower concave side to the second seal portion. The lower concave side has an extending upper concave side, and the inclination angle of the lower concave side with respect to the extending direction of the first seal portion is 10 ° or more and 50 ° or less, and the first seal portion has a change in the seal width. A narrow side seal portion is formed on the lower side of the portion, and a wide side seal portion having a wider seal width than the narrow side seal portion is formed on the upper side of the seal width change portion. We propose a packaging bag in which the ratio of the length of the wide side seal portion to the length of the side seal portion is 0.3 or more and 1.0 or less.

In this self-standing packaging bag, the center of the container is recessed and constricted so that the vicinity of the center of gravity of the container can be grasped, so that the container can be easily held in an tilted state by holding it when refilling. However, a seal part is generated in the recessed part that is recessed inward in the place to be grasped, and the seal part is in a state of protruding outward. There was a problem that it hurt.

Japanese Patent No. 5138238 Japanese Unexamined Patent Publication No. 2002-21158 Japanese Patent No. 6068065

Therefore, in a large-capacity refillable packaging bag, it is an object of the present invention to obtain a packaging bag that makes it easy to hold the packaging bag in a refilled state and can stably refill.

The packaging bag of the present invention
In a packaging bag in which the sealant surfaces of the front film portion and the rear film portion face each other, the peripheral edges are fused to form a storage portion, and an opening capable of pouring is provided on the peripheral edge near the corners of the upper side and the side side. ,
At least one front film on the left right side, along the side that is farther from the opening, and in the inner storage that is separated from the outer end of the side seal or the side fold end. It is a packaging bag characterized by having a grip portion in which a portion and a rear film portion are fused.

The packaging bag of the present invention has at least one grip portion in which the front film portion and the rear film portion are fused to the inner storage portion separated from the side fusion outer end portion or the side folding end portion. Therefore, when the weight is heavy, the separated storage parts swell and do not form a plate, so it is easy to grasp. Moreover, since the grip is provided at a position along the side of the left and right sides that is farther from the opening, it is easy to hold the packaging bag even when the opening is tilted downward. Refilling can be done stably.

It is a figure which shows the 1st Embodiment example of the packaging bag of this invention. In the second embodiment of the packaging bag of the present invention, it is a figure which shows the form example which the grip part formed by a plurality of seal parts. It is a figure which shows in the 3rd Embodiment example of the packaging bag of this invention. It is a figure which shows the comparative example 1 of the conventional packaging bag which does not have a grip part. It is a figure which shows the comparative example 2 of the packaging bag which the grip part is connected to the side seal part.

Hereinafter, embodiments of the packaging bag of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing an example of the first embodiment of the packaging bag 1 of the present invention.
In this packaging bag 1, the sealant surfaces of the front film portion 11 and the rear film portion 12 face each other, and the peripheral edges are fused to form the storage portion 18, and the corner portions of the upper side seal portion 13 and the left side seal portion 15 are formed. The injection port 20 is fused as an opening 2 that can be injected to the peripheral edge of the vicinity.
In particular, in the first embodiment, an inclined seal portion 17 is formed at a corner portion between the left side seal portion 15 and the upper side seal portion 13, and the spout 20 having a boat-shaped fusion portion is the front film portion. It is fused without a gap so as to be sandwiched between the 11 and the rear film portion 12.
A cap 3 is fitted in the spout 20 so that it can be opened and closed.

Of the left right side, the side side farther from the opening, at the position along the right side in the first embodiment, and at the position of the inner storage portion 18 separated from the outer end of the right side seal portion. The front film portion 11 and the rear film portion 12 have a fusing grip portion 141 at at least one location. The grip portion 141 of the first embodiment is formed in an elliptical shape having a long axis in the vertical direction.

The bottom seal portion 16 is folded while the bottom film portion 161 faces the sealant surface of the front film portion 11 and the rear film portion 12 with the sealant surface on the outside to form a gusset.
By opening the bottom film portion 161, the bottom surface is formed and the bottom film portion 161 can stand on its own.

FIG. 2 is a diagram showing an example of a second embodiment of the packaging bag 1 of the present invention.
In this packaging bag 1, the side side of the left and right side sides that is farther from the opening, and in the second embodiment, the position along the right side seal portion 14 of the right side, and the right side fusion outer end. At the position of the inner storage portion 18 separated from the portion, there are several grip portions 141 in which the front film portion 11 and the rear film portion 12 are fused.
In the grip portion 141 of the second embodiment, a plurality of circular fused portions are formed in the vertical direction, in which four are arranged side by side.
In this way, the grip portion 141 forms a fused portion extending in the vertical direction. Of course, it does not have to be circular, and it does not have to be any number. However, it is desirable that the shape extends in the vertical direction as a whole.

FIG. 3 is a diagram showing an example of a third embodiment of the packaging bag 1 of the present invention.
In the packaging bag 1, the front film portion 11 and the rear film portion 12 are made of one film. It was bent on the right side so that the sealant surfaces of the front film portion 11 and the rear film portion 12 faced each other.

The bottom film portion 161 is folded with the sealant surface facing outward while the sealant surfaces of the front film portion 11 and the rear film portion 12 face each other to form a gusset.
Of course, the bottom film portion 161 may be manufactured from a single film integrated with the front film portion 11 and the rear film portion 12.

At the same time, at least one grip portion 141 in which the front film portion 11 and the rear film portion 12 are fused is provided in the inner storage portion 18 in which the grip portion 141 is separated from the right side folded end portion.
In the third embodiment, since the right end portion is not the right side seal portion but the right side folded end portion, it is folded into the cross section of the grip portion and melted as shown in the cross-sectional view of FIG. 3-2. Since there is no end of the film worn, the grip is easy to grip and it does not hurt even if you hold it firmly.

Next, the spout 20 having the boat-shaped fusion portion was fused in a state of being sandwiched between the front film portion 11 and the rear film portion 12 of the upper side sealing portion 13. At the same time, in the vicinity of the opening where the spout 20 was fused, a peripheral fusion portion 131 that entered the storage portion 18 inside the upper side seal portion 13 was formed.
When the contents are filled in the pouring container, the peripheral fusion portion 131 generates a pool inside the opening 2 so that the contents do not collect near the inside of the opening 2 and hinder the smooth pouring of the contents. This is an example of how to prevent it.
Finally, if the contents are filled from the left side surface and the left side seal portion 15 is fused, the packaging bag 1 third embodiment is completed.

The packaging bag of the present invention is as described above, and there is no particular problem in the front film, the rear film, and the film used for the bottom as long as the inner surfaces are sealant layers that can be fused to each other.
In particular, it is particularly preferable that the bottom film is a material that does not easily fuse with the surface opposite to the sealant layer.
Further, since this packaging bag has a particularly large capacity and a heavy weight, a constituent film having high rigidity and high strength such as drop strength that is hard to break even if there is an impact is preferable.

Examples of the base material layer include polyethylene terephthalate film, polypropylene film, polystyrene film, polyamide film, polycarbonate film, polyacrylonitrile film, and polyimide film. It is not particularly limited as long as it has mechanical strength and dimensional stability. A biaxially stretched film is particularly preferable. Further, these films may be provided with an aluminum vapor deposition layer.
In particular, it is desirable to improve the low temperature drop resistance and impact resistance by laminating a highly flexible film such as a polyamide film on the inside of the base material layer.

Further, the base material layer may be appropriately provided with a printing layer as needed. The printing layer is a layer printed with ink obtained by adding various pigments, extender pigments, plasticizers, desiccants, stabilizers, etc. to binder resins such as urethane-based, acrylic-based, nitrocellulose-based, and rubber-based. As the printing method, for example, known printing methods such as offset printing, gravure printing, flexographic printing, silk screen printing, and inkjet printing can be used. Further, the adhesion of the printing layer can be improved by subjecting the surface of the base material layer to a corona treatment or an ozone treatment as a pretreatment in advance.

A sealant resin having excellent cohesiveness is used for the innermost layer.
Examples of the sealant resin include low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, polypropylene, ethylene / propylene copolymer, ethylene / vinyl acetate copolymer, ethylene / methacrylic acid copolymer, and ethylene / acrylic acid. Copolymers, ethylene / ethyl acrylate copolymers, ionomer resins and the like can also be used.
These resins can be formed into a film by a T-die or an extruder such as inflation. It may be single layer or multiple layers.

As the adhesive layer, a dry laminating adhesive can be used. For example, a two-component curable urethane adhesive, a polyester urethane adhesive, a polyether urethane adhesive, an acrylic adhesive, a polyester adhesive, a polyamide adhesive, an epoxy adhesive, or the like can be used. .. As a bonding method, a dry laminating method can be used, but an extruder laminating machine may be used to bond the sealant layer side while forming a film, or sand polyethylene processing may be used.

Further, if it is necessary to improve various physical properties of the laminated sheet, for example, when improving the rigidity, drop strength, piercing strength, etc. of the laminated sheet, or when improving the barrier property of water vapor, oxygen gas, etc., it is intermediate. It is also possible to provide layers.

In order to improve the low temperature drop and impact resistance by the intermediate layer, it is necessary to improve the low temperature drop and impact resistance by laminating a highly flexible film such as a polyamide film inside the base material layer. Is desirable.
Further, in order to improve the barrier property, an aluminum foil, an aluminum-deposited polyester film, an inorganic oxide-deposited polyester film, a polyamide film and the like can be used.
In order to laminate these intermediate layers, they can be bonded by a dry laminating method via an adhesive layer.

Inorganic oxides for vapor deposition that improve barrier properties include silicon oxide, aluminum oxide, magnesium oxide, calcium oxide, potassium oxide, tin oxide, sodium oxide, boron oxide, titanium oxide, lead oxide, zirconium oxide, and yttrium oxide. Metal oxides can be used. Among them, silicon oxide, aluminum oxide, magnesium oxide and the like are preferable from the viewpoint of productivity and price.

The bottom film used for the bottom portion may have the same configuration as the front film portion and the rear film portion. However, from the viewpoint of usability and productivity, it is preferable to use a biaxially stretched film such as polyethylene terephthalate, polyamide, or polypropylene on the folded surface. Then, it is preferable to make the thickness thinner than the front film portion and the rear film portion so that the film can stand on its own smoothly.
Of course, it may be a packaging bag in which the front film portion, the rear film portion, and the bottom film are formed from a single film.

Examples of the present invention will be described below.

<Example 1>
The laminated film used for the front film part and the rear film part is composed of biaxially stretched polyethylene terephthalate film (12 μm) / biaxially stretched polyamide film (15 μm) / linear low-density polyethylene (150 μm) from the outside, and is an organic solvent. Using an ester-based adhesive for mold dry laminating (DIC Dry (registered trademark) LX500 manufactured by DIC Graphics Co., Ltd.), the films were bonded by a dry lamination machine.
The laminated film used for the bottom is composed of a biaxially stretched polyamide film (25 μm) / linear low-density polyethylene (150 μm) from the outside, and is an ester adhesive for organic solvent type dry laminate (DIC Graphics Co., Ltd. Dick). Dry (registered trademark) LX500) was used and bonded by a dry lamination machine.
The spout was made of low density polyethylene and the cap was made of polypropylene, which was obtained by injection molding.
The shape of the packaging bag is shown in FIG. 1, with a length of 350 mm, a width of 230 mm, a bottom gusset fold of 70 mm, a position of the inner end of the grip portion from the outer end of the right side seal portion of 40 mm, and a grip portion of a major axis of 60 mm and a minor axis. It has an elliptical shape of 20 mm.

<Comparative example 1>
The laminated film, the spout, and the cap used had the same configuration as in Example 1.
The shape of the packaging bag is shown in FIG. 4, and no grip portion is provided, but other than that, the packaging bag is created in the same manner as in Example 1.

<Comparative example 2>
The laminated film, the spout, and the cap used had the same configuration as in Example 1.
The shape of the packaging bag is shown in FIG. 5, in which the grip portion is connected to the right side seal portion, but other than that, the packaging bag is created in the same manner as in Example 1.

<Grip position independence evaluation sample>
The laminated film, the spout, and the cap used had the same configuration as in Example 1.
Although the shape of the packaging bag is shown in FIG. 1, six types of positions of the inner end of the grip portion from the outer end of the seal portion on the right side of the grip portion were created: 10 mm, 20 mm, 30 mm, 35 mm, 40 mm, and 45 mm.
Other than that, it was created in the same manner as in Example 1.

<Evaluation method>
<Grip stability evaluation>
As the contents, a refill packaging bag was prepared in which 3 L of liquid detergent was filled and the peripheral edges were fused and sealed.
When the above refill packaging bags are sequentially gripped with the grip and held with the spout facing upward, the packaging bag spout, etc. does not sway, and the grip is stable for 10 minutes. The sex was confirmed and evaluated.

<Stability evaluation when lifting>
As the contents, a refill packaging bag was prepared in which 3 L of liquid detergent was filled and the peripheral edges were fused and sealed.
The above-mentioned refill packaging bags are sequentially grasped by the gripping portion and held in a state where the spout is tilted downward, but the packaging bag spout and the like are not swayed and are stably held for 10 minutes. The stability at the time of lifting was confirmed and evaluated.

<Refill stability evaluation>
As the contents, 15 refill packaging bags were prepared by filling 3 L of liquid detergent and fusing the peripheral edges to seal them.
In addition, five empty pouring containers were prepared.
To refill the contents of the refill packaging bag into the pouring container one by one, hold it with the grip and hold the spout in a downward position without spilling even if the contents are reduced. The ease of pouring was evaluated by refill stability to see if the state of stable transfer could be maintained.

<Independence evaluation>
As the position of the grip portion, five independence evaluation samples were prepared in which the outer end position X of the grip portion was 10 mm, 20 mm, 30 mm, 35 mm, 40 mm, and 45 mm from the outer end portion of the side seal portion.
Each packaging bag was filled with 3 L of liquid detergent, and the peripheral edges were fused to form a sealed refill packaging bag.
This grip portion position independence evaluation sample was placed on a horizontal table to be independent and evaluated whether it could be maintained independently for 10 minutes.

<Evaluation result>
<Stability evaluation result>
In Example 1 and Comparative Example 2, the grip stability did not hurt without any problem and could be held with only one hand, but in Comparative Example 1, it was difficult to hold with one hand because the grip was only near the surrounding seal. I couldn't hold it for a long time.

Regarding the stability at the time of lifting, there was no problem in Example 1 and Comparative Example 1, and the packaging bag spout and the like did not sway, and the state of being held stably for 10 minutes could be maintained. However, in Comparative Example 2, when the container was firmly gripped, the side seal portion hit the palm and hurt, and the container could not be held in an upright state for a long time.

Regarding the refilling stability, in Example 1 and Comparative Example 2, all three bags could be refilled without spilling. In Comparative Example 1, since it was difficult to hold the packaging bag, it was difficult to stably fix the position of the spout, and it spilled to the surroundings.

<Result of independence evaluation>
The sample whose outer end position of the grip portion was 35 mm or less inward from the outer end portion of the side seal portion was independent without falling for 10 minutes.
However, the 40 mm and 45 mm independence evaluation samples, which were separated from 35 mm, could not stand on their own for 10 minutes and collapsed on the way.

From the above results, it was found that by providing the grip portion in the inner storage portion separated from the side seal portion, the packaging bag can be easily held and refilled even if it has a large capacity.
Further, it is important to ensure the independence at a position where the outer end of the grip portion is 35 mm or less inward from the outer end portion of the side seal portion or the side folding end portion.

As described above, in the packaging bag of the present invention, the front film portion and the rear film portion are fused to at least one place in the inner storage portion separated from the side side fusion outer end portion or the side side folding end portion. Since the grip portion is provided, when the content of the packaging bag is large, the separated storage portions swell and are easy to grip. Moreover, since the grip is provided at a position along the side of the left and right sides that is farther from the opening, even if the opening is tilted downward when the contents are poured out, the opening is tilted downward. Since it is easy to hold the packaging bag stably, refilling can be performed stably without spilling.
Further, since the grip portion is only fused at the time of sealing the peripheral edge, it can be manufactured at high speed with a general-purpose machine, which has great merits such as low cost.

1 ・ ・ ・ ・ ・ ・ ・ ・ Packaging bag 11 ・ ・ ・ ・ ・ ・ ・ Front film part 12 ・ ・ ・ ・ ・ ・ ・ ・ Rear film part 13 ・ ・ ・ ・ ・ ・ ・ ・ Upper side seal part 131 ・ ・ ・ ・ ・・ Peripheral fusion part 14 ・ ・ ・ ・ ・ ・ ・ Right side seal part 141 ・ ・ ・ ・ ・ ・ Grip part 15 ・ ・ ・ ・ ・ ・ ・ ・ Left side seal part 16 ・ ・ ・ ・ ・ ・ ・ Bottom seal part 161 ··········································································· Outlet 3 ・ ・ ・ ・ ・ ・ ・ ・ Cap X ・ ・ ・ ・ ・ ・ ・ ・ From the outer end of the side seal part to the outer end position of the grip part

Claims (5)

In a packaging bag in which the sealant surfaces of the front film portion and the rear film portion face each other, the peripheral edges are fused to form a storage portion, and an opening capable of pouring is provided on the peripheral edge near the corners of the upper side and the side side. ,
At least one front film on the left right side, along the side that is farther from the opening, and in the inner storage that is separated from the outer end of the side seal or the side fold end. A packaging bag characterized by having a grip portion in which a portion and a rear film portion are fused. The packaging bag according to claim 1, wherein the outer end of the grip portion is located at a position of 35 mm or less inward from the outer end portion of the side seal portion or the side folded end portion. The packaging bag according to claim 1 or 2, wherein the opening is a spout to which a spout is fused. The packaging bag according to any one of claims 1 to 3, wherein the bottom portion has a gusset. The packaging bag according to any one of claims 1 to 4, wherein the peripheral fusion portion in the vicinity of the opening has an inner end portion that has entered the storage side.

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