packaging bags

Abstract

To provide a packaging bag in which a storage part and a spout are formed by sealing the peripheral edges of a front laminate and a rear laminate, and with which it is possible to easily open the spout and discharge contents with only one hand.SOLUTION: A packaging bag includes a body part composed of a storage part formed by sealing peripheral edges of a front laminate and a rear laminate and an easily peelable part which is formed as such that sealant layers of the laminate with which the front laminate is continuous from the top and the laminate with which the front laminate is continuous from the bottom are opposed to each other, and peripheral edges are sealed, there is a branching part branching from the body part, the branching part can be bent vertically with respect to the body part, a spout that can be opened is formed at the tip, the inside of the branching part communicates with the storage part, and the spout is sealed with a peel strength that is less than the peel strength of other seals.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a packaging bag, and more particularly to a packaging bag made of a plastic film as a base material, capable of containing fluids such as liquids, and having a spout. [Background technology]

[0002] Packaging bags capable of storing liquids and other fluids are widely used and are made of either a single film or a laminate based on plastic film. Various types of bags are used for a wide range of purposes and have become indispensable in people's lives.

[0003] For example, in the food industry, plastic containers are widely used for liquid and paste-like contents such as beverages, prepared foods, seasonings, and retort foods, and in the fields of daily necessities and toiletries, a variety of products are crowded on the shelves of supermarkets, drugstores, and convenience stores.In this way, plastic containers are being used for a variety of purposes, not limited to the food industry, but also as liquid containers.

[0004] The advantages of packaging bags compared to containers such as cans and bottles include their low price, the ability to fine-tune material design to meet required quality, and the fact that they are lightweight and space-saving before filling and during distribution and storage. Packaging bags can also be said to be environmentally friendly from the perspective of reducing waste.

[0005] In addition, high-resolution printing on the layer visible from the surface can improve the product's image and display necessary information about the contents, and printing barcodes, for example, can also serve as a source of product distribution management and marketing information.

[0006] Some packaging bags have been commercialized as self-standing bags, commonly known as standing pouches. By making the bag self-standing, it becomes easier to display products, the capacity of the packaging bag can be increased, and it also makes it easier to remove the contents.

[0007] Another form of liquid container is glass bottles or plastic bottles, which are commonly used in the toiletry sector, for example, for detergents, shampoos, etc. However, with the recent rise in environmental awareness, there has been a movement to reduce the amount of waste and incineration, and issues have been raised about the disposal or incineration of these bottles after the contents have been removed.

[0008] In response to this, packaging bags have been devised to be used as containers for refilling glass or plastic bottles, and this has already been commercialized and is widely used in the market.

[0009] However, when opening the packaging bag to remove the contents, it is necessary to tear a part of the packaging bag to create an opening, which is usually done by cutting with a blade or by using fingers, which requires the use of both hands and is therefore not very convenient. Furthermore, after tearing, part of the packaging bag inevitably separates and becomes litter.

[0010] In Patent Document 1, as one form of packaging bag, a substrate having a sealant layer is A packaging bag has been proposed in which the bags are stacked facing each other, the periphery of the body is sealed, and a branch is formed that protrudes from the outside of the body, with a spout attached to the branch. However, when opening the bag, the tip of the spout must be cut to create an opening, which is cumbersome. Furthermore, the problem of the cut-off tip scattering has not been solved, and these operations pose the risk of the contents scattering and sticking to the surrounding area as well as the user's fingers. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Japanese Patent Application Publication No. 2018-052592 Summary of the Invention [Problem to be solved by the invention]

[0012] The present invention has been made in consideration of such circumstances, and its object is to provide a packaging bag in which a storage section and a spout are formed by sealing the peripheral edges of a front laminate and a rear laminate, and in which the spout can be easily opened and the contents poured out using only one hand. [Means for solving the problem]

[0013] As a means for solving the above problem, the invention described in claim 1 is: A packaging bag having a body portion formed by placing the sealant layers of a front laminate and a rear laminate, each having a plastic film and a sealant layer, opposite each other and sealing the peripheries of the laminate to form a storage section, the front laminate comprises a laminate continuing from the upper portion and a laminate continuing from the lower portion, the sealant layers of these laminates are opposed to each other, the peripheral edges thereof are sealed, and a branch portion branching from the body portion is provided; The branched portion can be bent vertically relative to the body portion, and an openable spout is formed at its tip. The inside of the branched portion is connected to the storage portion, and the spout has an easily peelable portion that is sealed with a peel strength that is smaller than the peel strength of other seals. This is a packaging bag.

[0014] The invention described in claim 2 is as follows: The packaging bag according to claim 1, wherein a bottom film made of a laminate having a plastic film and a sealant layer is inserted between the front laminate and the rear laminate in the lower part of the body portion, and the bottom is formed by sealing, making the bag self-standing.

[0015] The invention described in claim 3 is as follows: 3. The packaging bag according to claim 1, wherein the easily peelable portion includes an easy peel film between the opposing laminate and the easy peelable portion, and is sealed with the sealant layer.

[0016] The invention described in claim 4 is as follows: The packaging bag according to any one of claims 1 to 3, wherein the peel strength of the easily peelable portion is 15 N / 15 mm or less.

[0017] The invention described in claim 5 is as follows: In the packaging bag according to any one of claims 1 to 4, the peel strength of the easily peelable portion increases from the inside to the outside of the branch portion.

[0018] The invention described in claim 6 is as follows: The packaging bag according to any one of claims 1 to 5, which has a constriction for gripping with the hand. [Effects of the Invention]

[0019] According to the present invention, it is possible to provide a packaging bag in which a storage section and a spout are formed by sealing the peripheral edges of a front laminate and a rear laminate, and in which the spout can be easily opened and the contents poured out using only one hand. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective (partially see-through) schematic view of one embodiment of the packaging bag according to the present invention, seen from the front side of the body, for illustrating an unopened state filled with contents. [Figure 2] FIG. 2 is a perspective (partially see-through) schematic diagram of one embodiment of the packaging bag according to the present invention, seen from the front side of the body, to illustrate the state in which the upper part of the body is folded and the branch part is made upright for opening. [Figure 3] FIG. 3 is a perspective (partially see-through) schematic view of one embodiment of the packaging bag according to the present invention, seen from the front side of the body, for illustrating the state in which the spout at the tip of the branch is opened. [Figure 4]FIG. 4 is a perspective (partially see-through) schematic view of one embodiment of the packaging bag according to the present invention, seen from the front side of the body, for illustrating the state of pouring out of the contents after opening. [Figure 5] FIG. 5 is a perspective (partially see-through) schematic view seen from the front side of the body portion, for explaining another embodiment of the packaging bag according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] The present invention will be described in more detail below with reference to Figures 1 to 5. However, the present invention is not limited to the examples shown here. The present invention is defined by the claims.

[0022] FIG. 1 is a perspective (partially see-through) schematic view of one embodiment of the packaging bag according to the present invention, seen from the front side of the body, for illustrating an unopened state filled with contents.

[0023] The present invention provides a packaging bag (100) made of a laminate with a plastic film base and a sealant layer. Therefore, it is possible to store fluids such as liquids as contents (30), and it has a pour spout (22).

[0024] The packaging bag (100) is composed of a body portion (10), a bottom portion (2), and a branch portion (20). The packaging bag (100) is manufactured by sealing the peripheral portions of the body front side (5) and the body back side (6) with the sealant layers of the laminate facing each other to form a sealed portion (1), so that the contents (30) can be stored in the space between the body front side (5) and the body back side (6). In the example shown in Fig. 1, the contents (30) are stored in the portion from the bottom (2) of the packaging bag (100) to the liquid level (31).

[0025] 1 shows an example in which the packaging bag (100) is self-supporting, and a bottom film (3) made of a laminate having a plastic film base and a sealant layer is inserted and sealed between the body front side (5) and the body back side (6) in the bottom part (2) to form a bottom surface (4) at the bottom part (2) of the packaging bag (100), making the packaging part (100) self-supporting. The bottom film (3) can be inserted with the fold line (7) folded.

[0026] In other words, by expanding the bottom film (3), a bottom surface (4) is formed at the bottom (2) of the packaging bag (100), making it possible for the packaging bag (100) to stand on its own.

[0027] The bottom film (3) is inserted and sealed to form the bottom surface (4) of the packaging bag (100), making the packaging bag (100) self-standing, which makes it easy to display the product and the packaging bag ( The capacity of the container (100) can be increased, and the contents (30) can be easily removed.

[0028] The expansion of the bottom film (3) may be due to, for example, the weight of the filled contents (30). There are no particular restrictions on the shape of the bottom film (3), as long as the bottom (2) is sealed and the bottom film (3) is expandable to make the packaging bag (100) self-standing.

[0029] In addition, the upper edge of the body (10) is a filling port for filling the contents (30), and after sealing both side ends and the bottom (2), the contents (30) are filled, and then the seal portion (1) on the upper edge is sealed to seal the entire packaging bag (100).

[0030] The packaging bag (100) according to the present invention is composed of a laminate with a plastic film as a base material, and 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, etc., and is selected appropriately depending on the use and purpose.

[0031] In particular, polypropylene and polyethylene terephthalate are preferred as plastic films in terms of film strength and cost. In addition, when a stretched polyamide film is used in the laminate, it can impart toughness to the laminate against punctures and impacts.

[0032] In addition, the plastic film can be formed by directly laminating a film of molten resin, or by laminating it with other layers via an adhesive layer to form a laminate. Therefore, the layer structure, material structure, thickness, etc. of the laminate can be appropriately designed depending on the required quality of the packaging bag (100).

[0033] The packaging bag 100 according to the present invention is particularly characterized by the branched portion 20. Therefore, the branched portion 20 will be described in detail below.

[0034] On the outer side (5) of the body portion, a laminate continuing from the upper part of the outer side (5) and a laminate continuing from the lower part of the outer side (5) meet at a position above the center of the packaging bag (100), where the sealant layers face each other and overlap, and side seals (21) on both the left and right sides and a spout seal (23) at the tip are sealed to form a branching portion (20). In the example shown in Figure 1, the position above the center of the packaging bag (100) is indicated by the branching height position (A).

[0035] The spout (22) provided in the branching portion (20) is continuous with the space between the front side (5) of the body and the back side (6) of the body that can store the contents (30). The branching portion (20) protrudes from the front side (5) of the body and can be bent upward and downward. In the example shown in Figure 1, it is bent upward at the branch height position (A).

[0036] Therefore, in the example shown in Figure 1, of the two surfaces, front and back, of the branching portion (20), the laminate continuing from the lower part of the front side (5) of the body portion is visible, while the laminate continuing from the upper part of the front side (5) of the body portion is on the back side and is not visible.

[0037] The seal portion (23) of the spout (22) at the tip of the branch portion (20) is an easily peelable portion having a lower peel strength than the seal portion (1) around the periphery of the body (10) and the side seal portion (21) of the branch portion (20).

[0038] Because this portion is an easily peelable portion, when the contents (30) are filled in the packaging bag (100) and pressure is applied from the outside using, for example, fingers, the contents (30) act as internal pressure pushing the packaging bag (100) from the inside, and at this time the weak part, the seal part (23) of the spout, is broken from the inside of the branch part (20) to form an opening and open the bag. Details of opening the packaging bag (100) using pressure from the inside and pouring out the contents (30) will be described later.

[0039] The branch (30) is arranged to be separated from the body (10) of the packaging bag (100), i.e., branched, and the contents (30) are filled below the body (10), with a space at the top (11) of the body (10) or at the tip of the branch (20).

[0040] Therefore, even if the packaging bag (100) is accidentally subjected to pressure or impact from the outside, this space is effective in cushioning the impact of the pressure, preventing the external force from acting directly on the weak part, the seal part (23) of the spout, and effectively preventing the spout (22) from being unexpectedly opened.

[0041] Furthermore, if necessary, for example, to improve the shelf life of the contents (30), an opaque layer that blocks ultraviolet light, such as a colored film, can be provided in the laminate. Alternatively, a gas barrier layer can be provided in the laminate. Also, a gas barrier film can be used, for example, in which a gas barrier layer is provided on the surface of a plastic film.

[0042] The sealant layer of the laminate constituting the packaging bag (100) can be sealed by stacking two laminates with the sealant layers facing each other. For example, by applying heat and pressure to heat seal, the laminates are bonded to each other, making it possible to form and seal the packaging bag (100).

[0043] As the material for the sealant layer, polyolefin-based resins, which are thermoplastic resins, are generally used.Specific examples include ethylene-based resins such as 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, and ethylene-methacrylic acid resin copolymer, as well as blends of polyethylene and polybutene, and polypropylene-based resins such as homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer.

[0044] The sealant layer can be formed directly on the laminate by forming a film from a molten resin using an extruder, etc. Alternatively, the sealant layer can be formed on the surface of the laminate by laminating a sealant material that has already been formed into a film.

[0045] FIG. 2 is a perspective (partially see-through) schematic diagram of one embodiment of the packaging bag according to the present invention, seen from the front side of the body, to illustrate the state in which the upper part of the body is folded and the branch part is made upright for opening.

[0046] The packaging bag (100) according to the present invention can be opened by applying pressure from the outside of the packaging bag (100). Prior to this pressure from the outside, the upper part (11) of the body part (10) of the packaging bag (100) is folded in the folding direction (50) indicated by the dashed arrow in the figure. This can be done by folding the inside of the body (6) of the bag (00).

[0047] 2, the packaging bag (100) can be opened by turning it upside down and applying pressure from the outside of the packaging bag (100). In this case, for example, when transferring the contents (30) to another container, the spout (22) of the packaging bag (100) can be aligned with the opening of the container to be transferred, and the contents (30) can be poured out to perform the transfer.

[0048] FIG. 3 is a perspective (partially see-through) schematic view of one embodiment of the packaging bag according to the present invention, seen from the front side of the body, for illustrating the state in which the spout at the tip of the branch is opened.

[0049] As described above, the packaging bag (100) according to the present invention can be opened by applying pressure from the outside of the packaging bag (100). That is, as shown by the pressure direction (51) of the arrow in the figure, pressure can be applied from the outside of the packaging bag, for example, to both side edges of the body portion (10), to increase the liquid pressure of the contents (30).

[0050] The increased liquid pressure presses the packaging bag (100) evenly from the inside, but because the seal (23) at the spout at the tip of the branch (20) is an easily peelable portion with a lower peel strength than the seal (1) around the periphery of the body (10) and the side seal (21) of the branch (20), this weak portion breaks, forming an opening that leads from the inside of the packaging bag (100) to the outside, thereby opening the bag. After opening, this becomes the spout (22) through which the contents can be poured out.

[0051] In the packaging bag (100) according to the present invention, the easily peelable portion of the spout (22) can be constructed by disposing an easy-peel film between the opposing laminates and sealing it with the sealant layer.

[0052] When a weak portion is constructed in this manner, fluctuations and variations in sealing conditions can be eliminated, so a more stable weak portion can be constructed, and the easily peelable portion can have stable peel strength.

[0053] Furthermore, in the packaging bag (100) according to the present invention, the easily peelable portion of the spout (22) can have a peel strength of 15 N / 15 mm or less, which is within the range in which the easily peelable portion can be easily opened by applying pressure to the body (10) of the packaging bag (100) with one hand. For example, even elderly people and people with weak grip strength can easily open the packaging bag (100), making it a highly convenient opening mechanism.

[0054] Furthermore, the easily peelable portion of the spout (22) can be designed so that the peel strength increases from the inside to the outside of the packaging bag (100).

[0055] When designed in this way, opening by destruction of the easily peelable part, i.e., the fragile part, is not instantaneous or explosive, but occurs smoothly and sequentially from the inside to the outside of the packaging bag (100), which is effective in eliminating the risk of the contents spilling out when opening.

[0056] FIG. 4 is a perspective (partially see-through) schematic view of one embodiment of the packaging bag according to the present invention, seen from the front side of the body, for illustrating the state of pouring out of the contents after opening.

[0057] In the example of the packaging bag (100) shown in FIG. 4, the packaging bag (100) is a refill bag, and the contents (30) are being refilled into a refill container (40).

[0058] In this way, the contents (30) can be poured out through the opening (24) formed by hydraulic pressure from inside the packaging bag (100), and the spout (22) is positioned toward the opening (41) of the refill container (40).

[0059] The contents (30) naturally fall in the pouring direction (52) due to the weight of the contents (30) and the external air pressure acting on the packaging bag (100), but it is also possible to accelerate the pouring by applying pressure to the body of the packaging bag (100), for example, in the pressing direction (51) indicated by the arrow in the figure.

[0060] In this way, the packaging bag (100) according to the present invention is a packaging bag made of a laminate having a plastic film as a base material and a sealant layer, and can be easily opened and the contents poured out using only the fingers of one hand.

[0061] That is, this packaging bag (100) can be grasped with one hand, opened, and poured out as it is. Therefore, for example, it can be placed in the opening (41) of the container (40) to be refilled and poured out as it is, and it is also possible to accelerate the pouring by applying pressure with one hand.

[0062] FIG. 5 is a perspective (partially see-through) schematic view seen from the front side of the body portion, for explaining another embodiment of the packaging bag according to the present invention.

[0063] The example shown in Figure 5 is an example in which the body part (10) of the packaging bag (100) is formed in a shape that is easy to grip with the fingers of one hand. That is, in this example, a waist part (8) is formed in the body part (10) so that it can be easily gripped with the palm and pressed down.

[0064] As in the example of the packaging bag (100) shown in Figure 1, the branched portion (20) is formed such that the laminate continuing from the upper part of the outer side (5) of the body and the laminate continuing from the lower part of the outer side (5) of the body meet above the center of the packaging bag (100), with the sealant layers facing each other and overlapping, and the side seal portions (21) on both the left and right sides and the spout seal portion (23) at the tip of the branched portion (20) are sealed.

[0065] Also, as in the example shown in Figure 1, the spout (22) of the branching portion (20) is continuous with the space between the front side (5) of the body and the back side (6) of the body, the branching portion (20) protrudes from the front side (5) of the body and can be bent in the vertical direction, and the seal portion (23) of the spout at the tip of the branching portion (20) is an easily peelable portion with a seal peel strength lower than the seal portion (1) around the periphery of the body and the side seal portion (21) of the branching portion (20).

[0066] In the packaging bag (100) according to the present invention, the bottom portion (2) is provided with a bottom film (3), which can be expanded to form a bottom surface (4), thereby providing the packaging bag (100) with self-supporting properties. The expansion of the bottom film (3) may be due to, for example, the weight of the contents (30) filled therein.

[0067] In addition, a bottom film (3) composed of a laminate having a plastic film as a base material and a sealant layer is inserted and sealed between the front side (5) of the body and the back side (6) of the body at the bottom (2) of the body (10), thereby sealing the bottom (2) of the packaging bag (100). Considering that the packaging bag (100) can be made self-standing, there are no particular restrictions on its shape.

[0068] In the example of the packaging bag (100) shown in FIG. 5, the packaging bag (100) can also be opened by applying pressure from the outside of the packaging bag (100). Prior to this external pressure, the upper part (11) of the body of the packaging bag (100) is folded in the folding direction (53) indicated by the dashed arrow in the figure. This can be done after folding the packaging bag (100) in the direction of the arrow (3) toward the back side (6) of the body part.

[0069] In addition, for example, when transferring the contents (30) to another container, the spout (22) of the packaging bag (100) can be aligned with the opening (41) of the container (40) to which the contents are to be transferred, and the contents (30) can be poured out as is after opening the bag.

[0070] In this way, when the shape of the body (10) of the packaging bag (100) is made more suitable for holding with one hand, it becomes possible to hold, open, and remove the contents (30) of the packaging bag (100) more easily and stably, which is effective in further improving convenience.

[0071] That is, even in the example shown in FIG. 5, the packaging bag (100) can be held and opened with one hand, and the shape of the body portion (10) is more suitable for holding the body portion with the palm of the hand, so that pressure for opening can be applied effectively.

[0072] In addition, the container can be opened and then poured out immediately, so that it can be placed at the opening (41) of the container (40) to be refilled, opened, and poured out, and it is also possible to accelerate the pouring by pressing it with the fingers.

[0073] In this way, the packaging bag according to the present invention is a packaging bag in which a storage section and a spout are formed by sealing the peripheral edges of the front laminate and the rear laminate, and it is possible to provide a packaging bag in which the spout can be easily opened and the contents poured out using only one hand. [Explanation of symbols]

[0074] 1. Seal part 2...Bottom 3. Bottom film 4 Bottom 5. Front side of body 6 Back of the body 7. Fold line 8. Waistline 10. Torso 11. Top 20 Branch 21 Side seal part 22. Spout 23 Spout seal 24...Opening 30...Contents 31...liquid level 40 Refill container 41 Opening 50...Folding direction 51 Pressing direction 52 Pouring direction 53 Folding direction 100...packaging bag A: Branch height position

Claims

1. A packaging bag having a body portion formed by placing the sealant layers of a front laminate and a rear laminate, each having a plastic film and a sealant layer, opposite each other and sealing the peripheries of the laminate to form a storage section, the front laminate comprises a laminate continuing from the upper portion and a laminate continuing from the lower portion, the sealant layers of these laminates are opposed to each other, the peripheral edges thereof are sealed, and a branch portion branching from the body portion is provided; The branched portion can be bent in the vertical direction relative to the body portion, and an openable spout is formed at the tip of the branched portion. The inside of the branched portion is connected to the storage portion, and the spout has an easily peelable portion that is sealed with a peel strength that is smaller than the peel strength of other seals. a length in the vertical direction of the branch portion is shorter than a length in the vertical direction of an upper portion of the body portion where the stack continuing from the upper portion and the rear stack are sealed, The packaging bag, wherein the peel strength of the easily peelable portion increases from the inside to the outside of the branch portion.

2. 2. The packaging bag according to claim 1, wherein a bottom film made of a laminate having a plastic film and a sealant layer is inserted between the front laminate and the rear laminate in the lower part of the body portion, and the bottom is formed by sealing, making the bag self-standing.

3. The packaging bag according to claim 1 or 2, wherein the easily peelable portion includes an easy-peel film between the opposing laminate and the sealant layer, and is sealed with the sealant layer.

4. The packaging bag according to any one of claims 1 to 3, wherein the peel strength of the easily peelable portion is 15 N / 15 mm or less.

5. The packaging bag according to any one of claims 1 to 4, which has a constriction for gripping with a hand.

6. the laminated body continuing from the lower part and constituting the branching portion is arranged so as to be visible at the branching portion, The packaging bag according to any one of claims 1 to 5, wherein the laminate continuing from the upper portion and constituting the branched portion faces the body portion at the branched portion.

7. A packaging bag as described in any one of claims 1 to 6, wherein the spout formed at the tip of the branched portion is located on the upper side of the body portion relative to the folding portion at which the branched portion can be folded in the vertical direction relative to the body portion.

8. A packaging bag having a body portion formed by placing the sealant layers of a front laminate and a rear laminate, each having a plastic film and a sealant layer, opposite each other and sealing the peripheries of the laminate to form a storage section, the front laminate comprises a laminate continuing from the upper portion and a laminate continuing from the lower portion, the sealant layers of these laminates are opposed to each other, the peripheral edges thereof are sealed, and a branch portion branching from the body portion is provided; The branched portion can be bent in the vertical direction relative to the body portion, and an openable spout is formed at the tip of the branched portion. The inside of the branched portion is connected to the storage portion, and the spout has an easily peelable portion that is sealed with a peel strength that is smaller than the peel strength of other seals. The packaging bag, wherein the peel strength of the easily peelable portion increases from the inside to the outside of the branch portion.

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