JP2022132924A - Refill packing bag - Google Patents

Abstract

To provide a refill packing bag from which liquid of contents is not splashed when the bag is opened, in which the liquid of contents is hardly spilled in a work for refilling the liquid of contents into another container, and which can refill the liquid easily and quickly.SOLUTION: A packing bag is formed of a front side trunk part, a backside trunk part, a bottom part, and a branching. In the branching, an insertion port to another container is formed at the center in a horizontal width direction. In the vicinity of the tip of the insertion port, across a flow path, an opening schedule line and a weak seal part which positioned inside along the opening schedule line, are prepared. After cutting the opening schedule line, a refill packing bag is turned upside down, and the insertion port to a refillable container is inserted into an opening part of the refillable container. Then, the weak seal part is broken by a fluid pressure of the liquid of contents, becomes the opening part and forms a spout. The liquid of contents is refilled to the refillable container.SELECTED DRAWING: Figure 1

Description

The present invention relates to a packaging bag. In particular, the present invention relates to a packaging bag for refilling, which is constructed using a plastic film as a base material, and which can be refilled into another container more easily and stably.

Packaging bags, which are a type of packaging material, are widely used, consisting of a single piece or a laminated body using plastic film as a base material, and various forms are used for a wide range of purposes. has become indispensable for

Packaging bags are also used, for example, as containers for liquids, and are widely used in the food field such as beverages and retort pouch foods.In addition to daily necessities and toiletries, various products are found on the shelves of supermarkets, drug stores, and convenience stores. Bustling. In addition to liquid containers, various applications have been developed.

The advantages of packaging bags are that they are cheaper than other containers such as cans and bottles, that they can be handled with detailed material design according to the required quality, and that they are lightweight and save money before filling the contents, during distribution and storage. space. Also, packaging bags can be said to be environmentally friendly from the viewpoint of reducing waste.

In addition, high-definition printing on the layer visible from the surface can improve the image of the brand and differentiate the product, and it is possible to display necessary information about the contents. It is also a source of product distribution and marketing information.

Some packaging bags, which are self-supporting with a bottom film, have been commercialized and are generally called standing pouches. By making it self-supporting, further convenience has been achieved in terms of handling, storage, and taking out of the contents.

In addition, packaging bags that can be refilled into containers such as plastic bottles and glass bottles are already widely available for the purpose of reducing the volume of waste and reducing the cost of packaging containers.

Patent Literature 1 proposes a packaging bag that can be refilled into another container. A spout provided at the branch of the trunk is cut to form an opening, and the bag is inserted into the container to be refilled. It is a structure that allows the contents to be transferred with a There was also the danger of it overflowing, so it was necessary to pay close attention to the work.

Further, Patent Document 2 proposes a packaging bag provided with a spout at the shoulder on the upper side of the body and having a mechanism for gradually widening and adjusting the width of the flow path. There was a problem with practicality and workability because there was work such as peeling off the part, and it required a complicated work.

JP 2018-52592 A JP 2018-127231 A

The present invention has been made in view of such circumstances, and provides a refill packaging bag constructed of a plastic film as a base material, which prevents the liquid content from scattering when opened, and allows the liquid content to be transferred to another container. To provide a packaging bag for refilling, in which the liquid content is hardly spilled in the work of refilling into a container, and which enables easy and quick refilling.

As a means for solving the above problems, the invention according to claim 1,
A refill packaging bag made of a laminate having a plastic film as a base material and having at least a sealant layer,
The packaging bag has a front side body, a rear side body, a bottom, and a branch having an insertion port into a container to be refilled. is bagged,
The sealant layers of the front trunk portion and the rear trunk portion are arranged so as to face each other,
The left and right ends of the body are sealed and sealed,
The laminate is folded back or sealed at the upper end, and the upper part of the body is sealed,
In the lower part of the barrel, between the front barrel and the rear barrel, the sealant layer of the bottom film constituting the bottom is folded and arranged so as to face the sealant layer of the barrel,
The bottom film is expanded and sealed with the body so that the packaging bag can stand on its own, and the lower part of the packaging bag is sealed,
Either the front body or the rear body is formed with a branch projecting from the body,
At the branching point, the sealant layers of the laminated body continuing from the upper side of the body portion and the laminated body continuing from the lower side of the body portion overlap each other above the center of the packaging bag, and the side ends and the tip are heat-sealed. formed by
In the branch, an insertion port to another container is formed in the center of the left-right width direction,
The insertion port communicates with the inside of the packaging bag, and in the center is provided as a non-sealed portion a flow path for the liquid of the contents during refilling,
Furthermore, near the tip of the insertion port, a weak seal portion is provided on the inner side along the planned opening line and along the planned opening line across the flow path,
After tearing the planned opening line, turn the refill packaging bag upside down, insert the refill port into the opening of the refill container, and then the liquid pressure of the contents will create a weak seal. is destroyed and becomes an opening to form a spout,
A packaging bag for refilling, characterized in that the liquid content is refilled into a refilling destination container.

In addition, the invention according to claim 2,
2. The method according to claim 1, wherein the breakage of the weakly sealed portion due to the liquid pressure of the liquid in the content is performed by pressing the body portion of the refill packaging bag with fingers to pressurize it. It is a packaging bag for refilling.

In addition, the invention according to claim 3,
The weak seal portion is provided in a region that traverses the liquid flow path of the insertion port to the container of the previous refill destination and is inside the container from the planned opening line or in a region that covers the planned opening line. A refill packaging bag according to claim 1 or claim 2.

Further, the invention according to claim 4,
In the weakly sealed portion, the width of the central portion is narrower than the width of both end portions inside the container from the planned opening line, and the boundary with the liquid flow path provided as the non-sealed portion is a semicircle toward the planned opening line. The refill packaging bag according to any one of claims 1 to 3, characterized in that it has a convex shape.

According to the present invention, in a refill packaging bag constructed using a plastic film as a base material, the liquid content does not scatter when unsealed, and the content does not scatter when the content liquid is refilled into another container. It is possible to provide a packaging bag for refilling, in which the liquid is less likely to spill and can be refilled easily and quickly.

A packaging bag made by manufacturing a laminate having at least a sealant layer with a plastic film as a base material can contain a liquid as a content.

Further, in the lower part of the body, the sealant layer of the bottom film constituting the bottom is arranged between the front body and the rear body by being folded so as to face the sealant layer of the body, and the bottom film is By expanding the packaging bag so that it can stand on its own and is sealed with the body, the volume inside the packaging bag surrounded by the front body, the rear body and the bottom film is also increased to hold a predetermined amount of contents. The liquid of the object can be stored inside the refill packaging bag.

Moreover, by having this self-supporting property, the refill packaging bag according to the present invention has advantages not only in terms of usability but also in terms of handling and appearance when displayed in stores.

A branch projecting from the body is formed on either the front body or the rear body, and the branch is formed with an insertion port for another container at the center in the left-right width direction. Thus, the refill packaging bag can be stably transferred by inserting the insertion port into the opening of another container to be refilled.

Furthermore, near the tip of the insertion port, a line to be unsealed and a weak seal part are provided inside along the line to be unsealed across the flow path, so that the tip is separated by tearing along the line to be unsealed. Even when the container is closed, the seal is not broken, and the contents can be prevented from splashing or spilling.

After tearing the planned opening line, turn the refill packaging bag upside down, insert the refill port into the opening of the refill container, and then the liquid pressure of the contents will create a weak seal. is destroyed, forming an opening and forming a spout, and the liquid content is refilled into the refill destination container. It is possible to prevent spattering and spilling caused.

In particular, according to the second aspect of the invention, the breakage of the weakly sealed portion due to the liquid pressure of the liquid in the contents is performed by pressing the body portion of the refill packaging bag with fingers to pressurize it. Therefore, easy and stable refilling work can be performed by fingers.

In particular, according to the third aspect of the invention, the weak seal portion traverses the liquid flow path of the insertion port into the container to be refilled before and covers the inner side of the planned opening line or the planned opening line. By being provided in the region, even when the container is torn along the intended opening line, the seal is not broken, and the contents can be prevented from scattering or spilling out. In addition, it is possible to eliminate the influence of the tearing of the expected opening line, even if it deviates from the expected opening line.

In particular, according to the fourth aspect of the present invention, the weak seal portion has a center width narrower than both end portions of the weak seal portion on the inside of the container from the intended opening line, and the weak seal portion has a width that is narrower than the width of the both end portions, and the liquid flow path provided as the non-seal portion. Since the boundary is a semicircular convex shape toward the planned unsealing line, the weak seal portion is first broken by the liquid pressure of the liquid of the contents, and the width of the weak seal portion is narrowed. It starts from the vertex of the convex shape of , and propagates to both left and right sides. Therefore, the formation of the opening is not bursty but performed smoothly, which is more effective in preventing the liquid content from scattering.

FIG. 1 is a schematic plan view for explaining one embodiment of a refill packaging bag according to the present invention, and a schematic plan view for explaining Example 1. FIG. FIG. 2 is a perspective (partially see-through) schematic diagram for explaining the state of the refill packaging bag according to one embodiment of the present invention, after the planned opening line has been cut and before refilling. FIG. 3 is a perspective (partially see-through) schematic diagram for explaining a state during refilling into a refill destination container in one embodiment of the refill packaging bag according to the present invention. FIG. 4 is a schematic perspective view for explaining a state in which the refilling into the refilling destination container is completed in one embodiment of the refillable packaging bag according to the present invention. FIG. 5 is a schematic partial plan view for explaining one form of the weak seal portion with respect to the branched portion in one embodiment of the refill packaging bag according to the present invention. FIG. 6 is a schematic partial plan view for explaining another form of the weak seal portion with respect to the branched portion in one embodiment of the refill packaging bag according to the present invention. FIG. 7 is a schematic partial plan view for explaining still another form of the weak seal portion with respect to the branched portion in one embodiment of the refill packaging bag according to the present invention. FIG. 8 is a partially enlarged plan view for explaining the details of the weak seal portion of the example shown in FIG. 7 in one embodiment of the refill packaging bag according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 1 to 8. FIG. However, the present invention is not limited only by the examples given here. The invention is defined by the claims.

FIG. 1 is a schematic plan view for explaining one embodiment of the refill packaging bag according to the present invention.

The present invention is a refill packaging bag (100) comprising a laminate comprising a plastic film as a base material and at least a sealant layer. This refill packaging bag (100) is a packaging bag for the purpose of transferring the liquid contained therein to a refill destination container.

The plastic film is a film made of a polymer resin composition, such as polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide (nylon-6, nylon-66, etc.), Polyimide or the like can be used, and is appropriately selected depending on the application.

In particular, when polypropylene or polyethylene terephthalate is used as a plastic film, it is preferable in terms of film strength and cost. In addition, when a stretched polyamide film is used, the laminate can be provided with toughness against puncture and toughness against impact.

Also, the plastic film can be laminated with other layers via a molten resin layer or an adhesive layer to form a laminate. The layer structure, material structure, thickness, etc. of the laminate can be appropriately designed according to the required quality of the packaging bag.

For example, a gas barrier layer can be provided in the laminate constituting the packaging bag for the purpose of improving the storage stability of the contents and preventing deterioration or change of the contents due to environmental conditions. As the gas barrier layer, for example, a metal foil such as an aluminum foil or a gas barrier film obtained by providing a vapor deposition film of an inorganic compound on a plastic film can be used.

In addition, a pattern, a logo mark, information about the contents, and the like can be provided on the layer visible from the outside of the packaging bag using a technique such as printing. This layer may be provided as the outermost layer of the packaging bag.

The sealant layer makes it possible to form a packaging bag by stacking two laminates so that the sealant layers face each other and, for example, heat-pressing and heat-sealing them to adhere to each other.

Among thermoplastic resins, polyolefin-based resins are generally used as the material for the sealant layer. Specifically, low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), linear low-density polyethylene resin. (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α olefin copolymer, ethylene-methacrylic acid resin copolymer and the like can be used.

In addition, blended resins of polyethylene and polybutene, polypropylene resins such as homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, propylene-α-olefin copolymer, etc. may be used. can be done.

The sealant layer can be formed by forming a film of molten resin 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 laminate by laminating materials that have been formed into films in advance.

The refill packaging bag (100) according to the present invention comprises a front body (1), a rear body (2), a bottom (3), and a branch (20) having an insertion opening into a container to be refilled. is also composed of the above-described laminate, and is made into a bag capable of containing the liquid content therein.

The liquid content is stored in the space surrounded by the front body (1), the rear body (2), and the bottom (3), and passes through a branch (20) having an insertion port into the container to be refilled. Then, refilling to the refilling destination container is performed.

The sealant layers of the front body (1) and the rear body (2) are arranged so as to face each other, and both the left and right ends of the body (5) are sealed by sealing portions (6). ing. In addition, the laminate is folded back or sealed with a seal portion (7) at the upper end portion, and the upper portion (4) of the trunk portion is sealed.

The sealing portion (7) at the upper end seals, for example, the body (5) and bottom (3) of the refill packaging bag (100) to form a storage space, and the contents can be stored from the top (4) of the body. After filling with the liquid, the refill packaging bag (100) can be sealed by sealing with the sealing part (7) at the upper end.

In the lower part of the barrel, between the front barrel (1) and the rear barrel (2), the sealant layer of the bottom film (10), which constitutes the bottom (3), meets the sealant layer of the barrel (5). They are folded and placed along the fold line (9) so as to face each other. That is, the bottom film (10) is expanded and self-sustainably sealed by the body (5) and the sealing part (8), and the lower part (3) of the packaging bag is sealed.

The expansion of the bottom film (10) is such that, for example, when the liquid content is filled from the top (4) of the barrel, the bottom film (10) is spread downward by its own weight, thereby forming the bottom surface. can become self-reliant.

Due to this expansion of the bottom film (10), the volume inside the packaging bag surrounded by the front body (1), the back body (2) and the bottom film (10) is also increased, and a predetermined amount of contents can be obtained. The liquid of the object can be stored inside the refill packaging bag (100).

In addition, due to this self-standing, the refill packaging bag (100) according to the present invention has advantages not only in terms of usability but also in terms of handling and appearance when displayed in stores.

A branch (20) projecting from either the front (1) or rear (2) body is formed. The branch (20) is formed above the center of the packaging bag by overlapping the laminated body continuing from the upper side of the body and the laminated body continuing from the lower side of the body with the sealant layers facing each other to form side ends (27) and The tip (26) is sealed to form a hermetic seal.

That is, in the example shown in FIG. 1, the branch (20) is a portion where the laminate continues from the lower side of the body on the front side of the drawing, and the invisible portion on the other side of the drawing is the body. It is a part where the laminated body continuing from the upper part is continuous, and both are overlapped in such a manner that the sealant layers face each other. In the example shown in FIG. 1, the branch (20) projects from the front body (1) toward the front of the figure at the height position (A) of the branch and is folded upward. For example.

The branch (20) is formed with an insertion port (23) for another container at the center in the lateral width direction. The refill packaging bag (100) can be refilled by inserting the insertion port (23) into the opening of the refill destination container.

In the example shown in FIG. 1, the insertion port (23) is provided with a recess (24), and the recess (24) allows the opening of the container to be refilled to be used as a support to be inserted and fixed. Therefore, stable refilling work can be performed.

The insertion port (23) provided in the center of the branch (20) in the lateral width direction communicates with the inside of the refill packaging bag (100), and the liquid flow path ( 25) is provided as a non-sealed portion. That is, the liquid contained in the refill packaging bag (100) flows through the channel (25) to the refill destination container for refilling.

Therefore, refilling can be done by turning the refill packaging bag (100) upside down and inserting the receptacle into the opening of the container to be refilled.

Below the tip (26) of the insertion port (23) of the branch (20), there is a planned opening line (22) across the flow path (25), and an opening planned line (22), and inwardly along the planned opening line (22). A weak seal (21) is provided.

FIG. 2 is a perspective (partially see-through) schematic diagram for explaining the state of the refill packaging bag according to one embodiment of the present invention, after the planned opening line has been cut and before refilling.

In the state shown in FIG. 2, the refill packaging bag (100) according to the present invention accommodates the liquid content (30) therein, and the bottom film (10) is held by the weight of the liquid content (30). It expands to form a bottom surface and is in a state where it can stand on its own.

The portion of the trunk (5) above the height position (A) of the branch is folded in the direction of the arrow (11) in the figure to the back of the packaging bag, and the branch (20) extends over the entire packaging bag. It is in a state of protruding upward, in which a series of refilling operations can be started.

When refilling the contents with the liquid (30), first, the branch (20) is torn along the unsealing line (22), and the tip (26) of the branch is cut off and separated. However, in a state in which the planned opening line (22) is torn and the tip (26) is cut off and separated, the sealing of the refill packaging bag (100) is not yet broken, and the weakly sealed portion (21) The flow path (25) of the branch (20) is blocked by , and the spout is not formed.

Therefore, in the refillable packaging bag (100) according to the present invention, it is possible to prevent the contents from spilling or overflowing due to the operation of cutting off the tip (26) of the branch. This function is particularly effective when the content liquid (30) has a low viscosity.

The intended opening line does not impose any particular restrictions on its shape or formation method, and may be cut using a knife such as scissors or a cutter, or for example, along the intended opening line (22). An easy opening mechanism may be provided to enable easier tearing by fingers. The easy-opening mechanism may be, for example, a half-cut to the laminate or a mechanism utilizing the molecular orientation of the plastic film, which can be selected as appropriate.

In addition, at the end of the expected opening line (22), it is possible to provide a trigger for tearing by notching or the like, and it is also possible to visualize the position from the outside of the packaging bag using a method such as printing. , is effective in promoting stable opening.

As described above, the refilling operation involves tearing the planned opening line (22), turning the refilling packaging bag (100) upside down, and inserting the insertion port (23) into the refilling destination container into the refilling destination container. This is done after inserting into the opening.

Therefore, when the insertion port (23) is inserted into the opening of the container to be refilled, the packaging bag is not unsealed due to the existence of the weak seal portion (21), and the liquid content (30) scatters. Also, spillage can be prevented.

Subsequently, the weak seal portion (21) is destroyed by the hydraulic pressure of the liquid (30) of the content, and an opening is formed at the tip of the flow path (25) to serve as a pouring spout for refilling into the refill destination container. work can be done.

FIG. 3 is a perspective (partially see-through) schematic diagram for explaining a state during refilling into a container to be refilled in one embodiment of the refillable packaging bag according to the present invention.

In the state shown in FIG. 3, the weak seal portion (21) is destroyed by the hydraulic pressure of the liquid (30) contained therein, and an opening (28) is formed at the tip of the branch (20). , the liquid content (30) flows through the flow path (25) to the refill destination container (40).

Destruction of the weak seal portion (21) by the hydraulic pressure of the liquid content can be performed by pressing the body portion (5) of the refill packaging bag (100) with fingers. For pressurization of the barrel, for example, a method of grasping the barrel with fingers and squeezing it to break the weak seal portion (21) by hydraulic pressure is possible.

In the present invention, the insertion port (23) is provided at the center of the branch (20) of the refill packaging bag (100) in the width direction, so that the force can be applied as it is with fingers supporting the packaging bag upside down. In addition, it is possible to push out the liquid (30) of the content by pressurizing by gripping and squeezing.

In the refill packaging bag (100) according to the present invention, following the breakage of the weak seal portion (21), the body portion (5) can be further pressed by squeezing the body portion (5) with fingers. The refilling work can be continued without any trouble, and the whole refilling work can be easily and stably performed in a short time.

FIG. 4 is a schematic perspective view for explaining a state in which refilling into a container to be refilled is completed in one embodiment of the refillable packaging bag according to the present invention.

In the example shown in FIG. 4, the weak seal portion (21) is broken by liquid pressure, and the body portion (5) of the refill packaging bag (100) is wound downward to release the liquid content (30). It shows how to squeeze out.

In the present invention, since the insertion port (23) is provided in the center of the width direction of the body (5) of the packaging bag, the body (5) of the refill packaging bag (100) is rolled downward. It is easily possible to press and extrude the contents.

In this case, following the breaking of the weak seal portion (21), the body (5) can be further rolled downward with fingers to continue pressurization by squeezing the body (5). In addition, it is possible to reduce the amount of liquid (30) remaining in the contents and to perform the entire refilling operation easily, stably, and in a short time. This work can be easily and stably performed by providing the spout of the refill packaging bag according to the present invention at the center of the branch in the width direction.

In the refill packaging bag (100) according to the present invention, as described above, the refill packaging bag (100) is set upside down in the opening of the container (40) to be refilled and fixed, and then the opening is opened. Since the part (28) is formed, it is possible to prevent the contents liquid (30) from spilling or overflowing during the refilling work. It is possible to do it on time.

FIG. 5 is a schematic partial plan view for explaining one form of the weak seal portion with respect to the branched portion in one embodiment of the refill packaging bag according to the present invention.

In the present invention, the shape of the weak seal portion (21) is not particularly restricted. Therefore, near the tip of the insertion port (23), crossing the flow path (25), a planned opening line (22) and a weak seal part (21) are provided inside along the planned opening line (22). The shape is arbitrary as long as the weak seal portion (21) is destroyed by the hydraulic pressure of the liquid content and becomes an opening to form a spout for refilling.

In the example shown in FIG. 5, the weak seal portion (21) is an example in which the unsealing line (22) is covered and continuously provided inside and outside. In this case, when tearing is performed along the planned opening line (22), a part of the weak seal part (21) is cut off and separated together with the tip part (26). Since the portion inside (22) remains as the tip portion of the channel (25), it is broken by the hydraulic pressure of the liquid (30) of the contents, and the opening (28) is formed. The seal of the bag is retained.

Formation of the weak seal portion (21) does not impose any particular restrictions on the sealing material or forming method. In refilling, the refill packaging bag (100) is turned upside down and is broken by the hydraulic pressure of the liquid (30) in the contents to form the opening (28), or the body (5) is further pushed by fingers. It can be appropriately selected within a range that can be pressurized and destroyed by the resulting increase in hydraulic pressure to form the opening (28).

For example, a weakly sealed portion (21) may be formed using a sealant whose sealing strength changes depending on the heat sealing temperature. may be formed.

FIG. 6 is a schematic partial plan view for explaining another form of the weak seal portion with respect to the branched portion in one embodiment of the refill packaging bag according to the present invention.

As described above, in the present invention, the shape of the weak seal portion (21) is not particularly limited. Therefore, near the tip of the insertion port (23), crossing the flow path (25), a planned opening line (22) and a weak seal part (21) are provided inside along the planned opening line (22). The shape is arbitrary as long as the weak seal portion (21) is destroyed by the hydraulic pressure of the liquid content and becomes an opening to form a spout for refilling.

In the example shown in FIG. 6, the weak seal part (21) is an example in which the weak seal part (21) is provided with an interval inside the expected unsealing line (22). In this case, since the weak seal portion (21) remains completely when tearing is performed along the planned opening line (22), the breaking strength is constant as determined in advance. be. In this case also, the sealing of the packaging bag is maintained until it is destroyed by the hydraulic pressure of the liquid (30) of the contents and the opening (28) is formed.

FIG. 7 is a partial schematic plan view for explaining still another form of the weak seal portion with respect to the branched portion in one embodiment of the refill packaging bag according to the present invention.

As described above, in the present invention, the shape of the weak seal portion (21) is not particularly limited. Therefore, near the tip of the insertion port (23), crossing the flow path (25), a planned opening line (22) and a weak seal part (21) are provided inside along the planned opening line (22). The shape is arbitrary as long as the weak seal portion (21) is destroyed by the hydraulic pressure of the liquid content and becomes an opening to form a spout for refilling.

In the example shown in FIG. 7, the weak seal portion (21) has a central width narrower than the width of both end portions inside the container from the expected unsealing line (22), and a liquid flow path ( 25) is an example of a semicircular convex shape toward the planned opening line (22).

FIG. 8 is a partially enlarged plan view for explaining the details of the weak seal portion of the example shown in FIG. 7 in one embodiment of the refill packaging bag according to the present invention.

In the examples shown in FIGS. 7 and 8, the width of the weakly sealed portion (21) is narrower than the width (B) at both ends of the weak seal portion (21) on the inner side of the container from the expected unsealing line (22). This is an example. When the weak seal portion (21) has such a shape, the breaking of the weak seal portion (21) and the formation of the spout due to the hydraulic pressure of the liquid in the contents are performed more smoothly.

In other words, the breakage of the weak seal portion (21) due to the liquid pressure of the liquid content starts from the apex of the semicircular convex shape where the width of the weak seal portion (21) is narrowed, propagate to both sides. Therefore, the formation of the opening is not bursty but performed smoothly, which is more effective in preventing the liquid content from scattering.

Thus, according to the present invention, in a refill packaging bag constructed using a plastic film as a base material, the liquid content does not scatter when the bag is opened, and the liquid content can be refilled into another container. It is possible to provide a packaging bag for refilling in which the liquid content is less likely to spill out during the work of refilling, and which can be easily and quickly refilled.

The present invention will now be described in more detail with reference to examples and comparative examples. However, the present invention is not limited only by the examples given here. The invention is defined by the claims.

A sample for evaluation of the refill packaging bag was prepared and filled with the liquid content. Using these, the work of refilling into another container (bottle) was implemented and evaluated.
Evaluation items are as follows.
・Difficulty in spilling when refilling ・Speed of refilling.

The contents of the filling liquid are as follows.
- Filling volume: 350 ml.
The viscosities of the liquid contents were set in three stages of low viscosity, medium viscosity, and high viscosity.
・Low viscosity: hand soap (143mP・s)
・Medium viscosity: body soap (850mP・s)
・High viscosity: Shampoo (1760 mP·s).

<Example 1>
(1) Form of refill packaging bag: Refill packaging bag with the external shape shown in Fig. 1 (2) Dimensions: 125 mm × 216 mm
(3) Presence/absence of branching: Yes (4) Presence/absence of a weak seal portion inside the intended opening line: Yes.

<Comparative Example 1>
(1) Form of refill packaging bag: Refill packaging bag with the external shape shown in Fig. 1 (2) Dimensions: 125 mm × 216 mm
(3) Presence/absence of branching: Yes (4) Presence/absence of weakly sealed portion inside planned opening line: No.
In Comparative Example 1, (4) is outside the scope of the present invention.

<Comparative Example 2>
(1) Form of refill packaging bag: A refill packaging bag that has no branches, has a scheduled opening line at the shoulder portion of the upper side, and can form a spout.
(2) Dimensions: 140mm x 220mm
(3) Presence/absence of branching: None (4) Presence/absence of a weakly sealed portion inside the expected opening line: Present.
In Comparative Example 2, (1) and (3) deviate from the stipulations of the present invention.

<Comparative Example 3>
(1) Form of refill packaging bag: A refill packaging bag that has no branches, has a scheduled opening line at the shoulder portion of the upper side, and can form a spout.
(2) Dimensions: 140mm x 220mm
(3) Presence or absence of branching: None (4) Presence or absence of a weak seal part inside the scheduled opening line: None.
In Comparative Example 3, (1), (3) and (4) deviate from the stipulations of the present invention.

Table 1 shows the evaluation results.

As can be seen from Table 1, in Example 1 according to the present invention, all of the liquids with contents of low viscosity, medium viscosity, and high viscosity were evaluated as ○, and other Comparative Examples 1 to Comparative Examples A clear superiority over 3 can be seen.

Example 1 and Comparative Examples 1 to 3 will be individually considered.

(Example 1)
・Since there is a weak seal, there is no splattering of the contents when the package is opened.
・Even if it is turned upside down, the liquid inside does not come out, so there is no chance of spilling.
・Since the surface area of the packaging bag is small, it is easy to squeeze out by hand after inserting it into the bottle to be refilled.
・Therefore, the time required for refilling can also be shortened.

(Comparative example 1)
・If the liquid content is low viscosity, the liquid content will splatter at the tear along the planned opening line.
・Difficulty in spilling occurs when the packaging bag is tilted and the liquid content is low in viscosity.
・Since the surface area of the packaging bag is small, it is easy to squeeze out by hand after inserting it into the bottle to be refilled.

(Comparative example 2)
・Since there is a weak seal, there is no splattering of the contents when the package is opened.
・Even if it is turned upside down, the liquid inside does not come out, so there is no chance of spilling.
・After inserting into the bottle to be refilled, it is difficult to squeeze out by hand due to the large surface area of the packaging bag.
・In Comparative Example 2, the "speed of refilling" was evaluated as △ regardless of the viscosity, and since there was no branching and the pouring was from the shoulder of the body, it was difficult to refill. It is considered that this is a result of poor performance and lack of speed.

(Comparative Example 3)
・If the liquid content is low viscosity, the liquid content will splatter at the tear along the planned opening line.
・Difficulty in spilling occurs when the packaging bag is tilted and the liquid content is low in viscosity.
・After inserting into the bottle to be refilled, it is difficult to squeeze out by hand due to the large surface area of the packaging bag.

In this way, in the refill packaging bag made of the plastic film as a base material, the liquid in the contents does not scatter when the bag is opened, and the liquid in the contents does not scatter when the liquid in the contents is refilled into another container. We were able to verify that it is possible to provide a refillable packaging bag that prevents liquid from spilling and that enables easy and quick refilling.

REFERENCE SIGNS LIST 1 front body 2 rear body 3 bottom 4 upper body 5 body 6 seal 7 seal 8 Sealed portion 9 Folding line 10 Bottom film 11 Arrow 20 Branch 21 Weakly sealed portion 22 Anticipated opening line 23 Insertion port 24 Recess 25 . . . Flow path 26 .. Tip 27 .. Side end 28 .. Opening 30 .・・・Branch height position B ・・・Width of both ends C ・・・Width of central part

Claims (4)

A refill packaging bag made of a laminate having a plastic film as a base material and having at least a sealant layer,
The packaging bag has a front side body, a rear side body, a bottom, and a branch having an insertion port into a container to be refilled. is bagged,
The sealant layers of the front trunk portion and the rear trunk portion are arranged so as to face each other,
The left and right ends of the body are sealed and sealed,
The laminate is folded back or sealed at the upper end, and the upper part of the body is sealed,
In the lower part of the barrel, between the front barrel and the rear barrel, the sealant layer of the bottom film constituting the bottom is folded and arranged so as to face the sealant layer of the barrel,
The bottom film is expanded and sealed with the body so that the packaging bag can stand on its own, and the lower part of the packaging bag is sealed,
Either the front body or the rear body is formed with a branch projecting from the body,
At the branching point, the sealant layers of the laminated body continuing from the upper side of the body portion and the laminated body continuing from the lower side of the body portion overlap each other above the center of the packaging bag, and the side ends and the tip are heat-sealed. formed by
In the branch, an insertion port to another container is formed in the center of the left-right width direction,
The insertion port communicates with the inside of the packaging bag, and in the center is provided as a non-sealed portion a flow path for the liquid of the contents during refilling,
Furthermore, near the tip of the insertion port, a weak seal portion is provided on the inner side along the planned opening line and along the planned opening line across the flow path,
After tearing the planned opening line, turn the refill packaging bag upside down, insert the refill port into the opening of the refill container, and then the liquid pressure of the contents will create a weak seal. is destroyed and becomes an opening to form a spout,
A packaging bag for refilling, characterized in that the liquid content is refilled into a refilling destination container. 2. The method according to claim 1, wherein the breakage of the weakly sealed portion due to the liquid pressure of the liquid in the content is performed by pressing the body portion of the refill packaging bag with fingers to pressurize it. Refill packaging bag. The weak seal portion is provided in a region that traverses the liquid flow path of the insertion port to the container of the previous refill destination and is inside the container from the planned opening line or in a region that covers the planned opening line. The refill packaging bag according to claim 1 or 2. In the weakly sealed portion, the width of the central portion is narrower than the width of both end portions inside the container from the planned opening line, and the boundary with the liquid flow path provided as the non-sealed portion is a semicircle toward the planned opening line. The refill packaging bag according to any one of claims 1 to 3, characterized in that it has a convex shape.

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