JP6772705B2 - Packaging bag - Google Patents

Description

The present invention relates to a packaging bag, and more particularly to a packaging bag having excellent dispenseability when a liquid content is stored and take-out property when a granular content is stored.

Flexible packaging bags made from laminated materials made by laminating various synthetic resin films, paper, aluminum foil, etc. into bags are used to store various contents. Among them, the so-called standing pouch, which stores liquid toiletry products such as shampoo and conditioner and is processed to be self-supporting, is a typical example.

Standing pouches containing shampoo and conditioner are often used for refilling, and are often transferred to regular bottle containers for use. However, since these liquids are often highly viscous, there is a problem that it takes a long time to inject them.

Therefore, various techniques have been proposed to prevent blockage of the spout and keep the opening wide. The flexible bag described in Patent Document 1 is a packaging bag in which a folding portion is provided in the pouring path so that the pouring path is greatly widened at the time of pouring.

The bag of Patent Document 2 and its manufacturing method describe a packaging bag in which a pipe is attached to an injection path and a manufacturing method thereof. Both the packaging bag described in Patent Document 1 and the packaging bag described in Patent Document 2 are effective in improving the dispenseability.

Japanese Unexamined Patent Publication No. 4-215957 Japanese Unexamined Patent Publication No. 5-13069

However, the packaging bag described in Patent Document 1 has a drawback that a large-scale device for folding the packaging material into a predetermined shape is required in the bag making process, and the manufacturing process is complicated. In addition, there is no opening on the top side when filling the contents, as in the case of a packaging bag with a shape called a three-way pouch, which is formed by sealing both sides and the bottom with the folded part of one sheet material as the top side. Therefore, filling is performed from the bottom side or the side side, which complicates the filling process, and there is a problem that the process of inserting the folding piece forming the bottom surface on the bottom side is also complicated.

Further, the packaging bag described in Patent Document 2 requires a separate pipe in addition to the packaging material, so that there is a problem that the material cost increases. Further, when the packaging bags are stacked on the stacker at the stage of filling the contents in the filling machine, there is a problem that many sheets cannot be stacked in an orderly manner because only the thickness of the spout portion is thick.

The present invention is intended to solve the above problems. The problem to be solved by the present invention is that no special material other than the packaging material is used, no large-scale manufacturing equipment is required, and the packaging bag is flat at the stage, but the injection path is wide and open at the time of pouring. However, we propose a new packaging bag that can be filled with the contents from the top side.

The invention according to claim 1 is a means for solving the above problems.
A rectangular shape in which a front surface material and a back surface material are formed, and both side surfaces and a bottom surface are sealed to form a side side seal portion and a bottom side seal portion, with the folded portion bent with the seal surface of one laminated body inside as the top side. It is a packaging bag of
A planned tear opening portion is provided on the upper side of one side, and the planned tear opening portion opens an unsealed portion along the inner edge of the side side sealed portion.
A part of the side side of the other side of the top side is opened to serve as a filling port, and after filling the contents from the filling port, the filling port is sealed to seal the packaging bag.
In the front and back materials, the first mountain fold line convex to the outside of the packaging bag from the end on the filling port side of the folded portion to the substantially central portion of a straight line that descends diagonally toward the lower end of the planned tear opening portion. And a second mountain fold line extending from the end point of the first mountain fold line to the middle portion of the planned ripping opening portion, and after cutting and opening the planned ripping opening portion, the top side on the substantially central portion is pressed. The packaging bag is characterized in that the first mountain fold line and the second mountain fold line are folded into mountain folds, and the opening is opened in a substantially rhombic shape or a substantially inverted triangular shape.

Further, the invention according to claim 2 is
The packaging bag according to claim 1, wherein the planned tear opening portion is oblique with the top side separated from the inner end side.

Further, the invention according to claim 3 is
The method according to any one of claims 1 or 2, wherein the front and back materials have a third mountain fold line extending from the intersection of the first mountain fold line and the second mountain fold line to a substantially central portion of the front and back materials. It is a packaging bag.

Further, the invention according to claim 4 is
The packaging bag according to any one of claims 1 to 3, wherein an opening knob is provided on the side seal portion of the planned tear opening portion.

Further, the invention according to claim 5 is
The packaging bag according to any one of claims 1 to 4, wherein a notch is provided from the outside on the side seal portion of the planned tear opening portion.

Further, the invention according to claim 6 is
The packaging bag according to any one of claims 1 to 5, wherein the packaging bag has a fold piece at the bottom.

Further, the invention according to claim 7 is
Any of claims 1 to 6, wherein the torn opening planned portion is formed along a side surface in which a part thereof protrudes, and after the opening, the opening forms a pouring cylinder protruding from the main body. The packaging bag according to item 1.

Further, the invention according to claim 8 is
The packaging bag according to any one of claims 1 to 7, wherein a recess is formed in a side seal portion near the lower side of the planned tear opening portion.

Further, the invention according to claim 9 is
The packaging bag according to any one of claims 1 to 8, wherein the front surface material and the back surface material are laminated bodies including a paper layer.

The packaging bag according to the present invention is formed by bending one laminate to form a top surface and front and back surface materials, filling the contents from a filling port having a part of the top surface opened, and then sealing and sealing the contents. By simply forming a few fold lines on the front and back materials, the planned ripping opening is cut and opened, and then the top is pressed to flatten the top because there is no seal on the top. It is easy to open the opening in a substantially rhombic shape or a substantially inverted triangular shape, so that a large area opening can be obtained. Therefore, since no special material is used other than the packaging material, the material cost does not increase. Furthermore, since it is flat at the stage of the unfilled packaging bag, the stackability in the feeder part of the filling machine is also good, and since there is a filling port on the top side, filling of the contents does not require a special device. It can be carried out.

As in the invention according to claim 2, if the planned tear opening portion is oblique, it becomes easier to observe the pouring condition and it becomes easier to adjust the pouring amount.

When the third mountain fold line is provided from the intersection of the first mountain fold line and the second mountain fold line to the substantially central portion of the front and back materials as in the invention of claim 3, when the top side is pressed after opening. , The packaging bag tends to swell along the folding line, and the opening also tends to swell.

If a knob for opening is provided in the side seal portion of the planned tear opening portion as in the invention according to claim 4, there is little possibility that the tear position is mistaken, and the tear can be easily performed.

If a notch is provided from the outside on the side seal portion of the planned ripping opening portion as in the invention of claim 5, there is less possibility that the ripping position is mistaken, and the ripping can be reliably continued to the planned ripping opening portion. it can.

When the packaging bag has a folding piece at the bottom as in the invention of claim 6, it can be a self-supporting packaging bag.

As in the invention according to claim 7, the planned tear opening portion is formed along the side surface where a part protrudes, and after the opening, the opening portion forms a pouring cylinder protruding from the main body. In this case, the package can be easily opened, and when the container is used as a refill container, the dispensing cylinder can be inserted into the container to be refilled, so that the refilling operation becomes safe and easy.

If a recess is formed in the side seal portion near the lower part of the planned tear opening portion as in the invention according to claim 8, the deformation generated when the top side is pressed tends to be concentrated in the opening portion. The opening can be expanded more effectively, and when used as a refill container, the contents can be poured out by hooking a recess in the mouth of the refill destination container, making it difficult for the contents to overflow, and the amount of pouring can be adjusted. It becomes easier to remove.

When the front surface material and the back surface material are laminates including a paper layer as in the invention of claim 9, the shape retention is improved and the open state can be easily maintained.

It is a perspective explanatory drawing which showed one Embodiment of the packaging bag which concerns on this invention. It is a plan explanatory view which showed the unused state of the packaging bag shown in FIG. It is a plane explanatory view which showed the other embodiment of the packaging bag which concerns on this invention. It is a plane explanatory view which showed the packaging bag which sandwiched the folding part which concerns on this invention. It is a perspective explanatory view of the state in which the planned opening portion of the packaging bag shown in FIG. 4 is torn. It is a plan explanatory view which showed the packaging bag which protruded a part of the side side which concerns on this invention. It is a plane explanatory view which showed the packaging bag which provided the recess in a part of the side side which concerns on this invention. It is an enlarged explanatory view which showed the embodiment of the planned tear opening part of the packaging bag shown in FIG. 7.

The packaging bag according to the present invention will be described in detail with reference to the drawings below. Needless to say, the present invention is not construed as being limited to the embodiments shown below.

FIG. 1 is a perspective explanatory view showing an embodiment of the packaging bag 1 according to the present invention, and is a view showing a state in which the contents are sealed and then opened. Further, FIG. 2 is a perspective explanatory view showing an unused state of the packaging bag shown in FIG.

In the packaging bag 1 according to the present invention, the front surface material 2 and the back surface material 3 are formed with the folded-back portion 8 bent with the sealing surface of one laminated body inside as the top side, and the side surfaces 6a, 6b and the bottom side 7 are formed. It is a sealed rectangular packaging bag. The side side of one side, in FIG. 2, has a torn opening planned portion 16 at the upper part of the left side side 6a. The planned ripping opening portion 16 opens the unsealed portion along the inner edge of the side sealed portion. When the width of the planned tear opening 16 in the vertical direction is used as a refill container, the width may be appropriately designed according to the size of the injection port of the refill destination container.

If the planned tear opening portion 16 is a fragile line formed by scratching the front surface of the front and back materials by a known means such as a blade or laser light, it is preferable that the fragile line can be easily opened along the fragile line. is there. The planned tear opening portion 16 may be parallel to the side seal portion, but if it is slanted as shown in FIG. 2, the cut end of the opening becomes slanted, and the content is dispensed when it is dispensed. It is preferable because it makes it easier to observe the state and makes it easier to adjust the pouring. Further, an opening notch 17 may be provided at the opening start portion. Further, it is preferable to provide an opening tab 14 as a handle at the opening start portion.

In addition, a part of the side side of the other side of the top side is torn to open the bag in an unused state, and serves as a filling port 12 for the contents. After filling the contents from the filling port 12, the open portion is sealed to seal the bag. It is preferable to seal the boundary portion between the filling port 12 and the folded-back portion 8 with the boundary sealing portion 5 because there is less possibility that the tear will proceed to the side of the planned opening portion 16 due to a defect in handling before sealing. .. FIG. 1 shows a state in which the filling port 12 is sealed.

Further, the packaging bag 1 according to the present invention has substantially the center of a straight line that descends diagonally from the end of the folded-back portion 8 on the boundary seal portion 5 side toward the lower end of the planned tear opening portion 16 in the front and back surface materials 2 and 3. It is characterized in that a first mountain fold line 9 that is convex to the outside of the packaging bag leading to the portion and a second mountain fold line 10 that extends from the end point of the first mountain fold line 9 to the middle portion of the planned tear opening portion 16 are provided. ..

After the planned ripping opening 16 is torn and opened, the first mountain fold line 9 and the second mountain fold line 10 are folded into mountain folds by pressing the top side on the substantially central portion, and the opening is as shown in FIG. The portion 18 opens in a substantially inverted triangular shape, or in a substantially rhombic shape depending on the degree of pressing. Since there is no seal on the top, it is easy to press. Further, the substantially central portion that is pressed naturally becomes a valley fold shape due to the relationship between the shapes of the first mountain fold line 9 and the second mountain fold line 10, but the end points of the first mountain fold line 9 on the front and back surfaces are connected to this part. The valley fold line 15 may be provided in advance. In the drawings below, the mountain fold line is shown as a solid line and the valley fold line is shown as a alternate long and short dash line.

As described above, in the packaging bag 1 according to the present invention, a large-area opening 18 can be obtained at the time of opening by a simple process of forming two fold lines on each of the front and back materials 2 and 3. The most common method for forming fold lines on the front and back materials is to sandwich them between male and female dies and press them to make folds, but prior to pressing, make shallow scratches along the fold lines. You can leave it.

Further, since the filling port 12 is provided on the top side, the bag can be filled with the contents as it is, and can be applied to a general filling device without providing a special mechanism. After filling, in order to seal the filling port 12, the filling ports 6a and 6b and the bottom side 7 can be sealed by a normal heat sealing method or the like.

FIG. 3 is a plan explanatory view showing another embodiment of the packaging bag 1 according to the present invention. In this embodiment, the first mountain fold line 9 and the second mountain fold line 10 are shown in the front and back materials 2 and 3. A third mountain fold line 11 is provided from the intersection of the above to the substantially central portion of the packaging bag 1.

When the third mountain fold line 11 is provided in this way, when the top side is pressed after the planned tear opening portion 16 is torn and opened, the packaging bag 1 tends to swell along the fold line, and the opening 18 also tends to swell. Further, if the effect of these mountain fold lines is not impaired, a separate mountain fold line may be provided. For example, a fourth mountain fold line 20 may be provided from the top to the bottom 7 at a substantially central portion in the width direction of the packaging bag 1 through the end point of the third mountain fold line 11.

In the embodiment shown in FIGS. 4 and 5, the front surface material 2 and the back surface material 3 are formed with the folded-back portion 8 bent with the sealing surface of one laminated body inside as the top side, as in FIG. A rectangular packaging bag having a filling port 12 that seals both sides 6a and 6b and the bottom 7, and further, the bottom 7 is an inverted V-shaped folding piece with the sealing surface of the laminate on the outside. It has a bottom surface portion in which 4 is inserted and sealed in an arc shape. Such a bottom structure is common as a self-supporting packaging bag called a standing pouch. The fold piece may also be referred to as a bottom tape. FIG. 4 is a plan explanatory view showing an unused state, and FIG. 5 is a view illustrating a state in which the packaging bag of FIG. 4 is actually used. The filling port 12 is sealed and the planned tear opening portion 16 is formed. It is a perspective explanatory view which shows the mode which formed the opening 18 by pressing the rift top side.

In the embodiment shown in FIG. 6, the planned tear opening portion 16 is formed along the side surface 6c in which a part thereof protrudes, and after the opening, the pouring cylinder 19 in which the opening protrudes from the main body is formed. It is characterized by that. Further, in this example, an opening tab 14 and an opening notch 17 are provided along with the planned tear opening portion 16. By doing so, the package can be easily opened, and when used as a refill container, the dispenser cylinder 19 can be inserted deeper into the container opening of the refill destination, so that the refill work can be performed safely and reliably. become.

In the embodiment shown in FIG. 7, the recess 13 is formed in the side seal portion near the lower side of the planned tear opening portion 16. Due to the presence of the recess 13, the deformation generated when the top surface is pressed after opening is restricted to the seal portion of the recess 13, concentrated in the range indicated by the arrow B in FIG. 8, and the opening 18 is expanded more effectively. In addition, when used as a refill container, the recess 13 can be hooked on the mouth of the container to be refilled and the contents can be poured out, so that the position of the opening is less likely to stably overflow and the note is made. It becomes easier to adjust the amount of output. Further, as compared with the embodiment shown in FIG. 6, since there is no protruding portion on the side side, it is easy to handle.

As the laminate used for the front surface material, the back surface material, and the folding piece of the packaging bag according to the present invention, a laminate usually used for a flexible packaging bag, which is obtained by laminating various synthetic resin films, aluminum foil, paper, etc. in combination, is used. Can be used. As the base material, paper, metal foil, or synthetic resin film consisting of one or several layers is used. For example, low density polyethylene resin (LDPE), high density polyethylene resin (HDPE), linear low density polyethylene resin (LLDPE), polypropylene resin (PP), polyolefin resin such as polyolefin elastomer, polyethylene terephthalate resin. (PET), polybutylene terephthalate resin (PBT), polyester resin such as polyethylene naphthalate resin (PEN), cellulose resin such as cellophane and cellulose triacetate (TAC), polymethylmethacrylate resin (PMMA), ethylene- Vinyl acetate copolymer resin (EVA), ionomer resin, polybutene resin, polyacrylonitrile resin, polyamide resin, polystyrene resin (PS), polyvinyl chloride resin (PVC), polyvinylidene chloride resin (PVDC) , Polycarbonate resin (PC), fluororesin, urethane resin and other synthetic resin films, paper, metal foil and the like are used alone or in combination. The base material includes, if necessary, a printing layer and an adhesive layer.

As the sealant layer used for the sealing surface, a polyolefin resin is generally used. Specifically, low density polyethylene resin, medium density polyethylene resin, linear low density polyethylene resin, ethylene / vinyl acetate copolymer, etc. Ethylene resins such as ethylene / α-olefin copolymers, homopolypropylene resins, propylene / ethylene random copolymers, propylene / ethylene block copolymers, polypropylene resins such as propylene / α-olefin copolymers, etc. are used. To. In addition, a multilayer film in which these resins are composited may be used.

Specific examples of the structure of the laminate include a film composed of PET / printing layer / adhesive layer / stretched polyamide resin film (hereinafter abbreviated as ONY) / adhesive layer / LLDPE, and ONY / adhesive layer / LLDPE. , And so on. When paper is used as a part of the laminate, it is easy to fold, the shape retention is improved, and it is easy to maintain the open state.

The packaging bag according to the present invention is useful as a refill container for shampoo, conditioner, etc., and can also be preferably used as a container for storing foods such as granular snacks and hail, taking advantage of the feature that a large opening can be obtained. ..

1 ... Packaging bag 2 ... Front material 3 ... Back material 4 ... Folded piece 5 ... Boundary seal 6a ... Left side, 6b ... Right side, 6c・ ・ ・ Protruding side 7 ・ ・ ・ Bottom 8 ・ ・ ・ Folded part 9 ・ ・ ・ First mountain fold line 10 ・ ・ ・ Second mountain fold line 11 ・ ・ ・ Third mountain fold line 12 ・ ・ ・ Filling port 13 ・・ ・ Recess 14 ・ ・ ・ Tab for opening 15 ・ ・ ・ Valley fold line 16 ・ ・ ・ Scheduled tear opening 17 ・ ・ ・ Notch for opening 18 ・ ・ ・ Opening 19 ・ ・ ・ Injection cylinder 20 Fourth mountain fold line

Claims (9)

A rectangular shape in which a front surface material and a back surface material are formed, and both side surfaces and a bottom surface are sealed to form a side side seal portion and a bottom side seal portion, with the folded portion bent with the seal surface of one laminated body inside as the top side. It is a packaging bag of
A planned tear opening portion is provided on the upper side of one side, and the planned tear opening portion opens an unsealed portion along the inner edge of the side side sealed portion.
A part of the side side of the other side of the top side is opened to serve as a filling port, and after filling the contents from the filling port, the filling port is sealed to seal the packaging bag.
In the front and back materials, the first mountain fold line that is convex outward of the packaging bag from the end on the filling port side of the folded portion to the substantially central portion of the straight line that descends diagonally toward the lower end of the planned tear opening portion. And a second mountain fold line extending from the end point of the first mountain fold line to the middle portion of the planned ripping opening, and after cutting and opening the planned ripping opening, the top side on the substantially central portion is pressed. The packaging bag is characterized in that the first mountain fold line and the second mountain fold line are folded into mountain folds, and the opening is opened in a substantially diamond shape or a substantially inverted triangular shape. The packaging bag according to claim 1, wherein the torn opening portion is oblique with the top side separated from the inner end side. The method according to any one of claims 1 or 2, wherein the front and back materials have a third mountain fold line extending from the intersection of the first mountain fold line and the second mountain fold line to a substantially central portion of the front and back materials. Packaging bag. The packaging bag according to any one of claims 1 to 3, wherein an opening knob is provided on the side seal portion of the planned tear opening portion. The packaging bag according to any one of claims 1 to 4, wherein a notch is provided from the outside on the side seal portion of the planned tear opening portion. The packaging bag according to any one of claims 1 to 5, wherein the packaging bag has a fold piece at the bottom. Any of claims 1 to 6, wherein the torn opening planned portion is formed along a side surface in which a part thereof protrudes, and after the opening, the opening forms a pouring cylinder protruding from the main body. The packaging bag according to item 1. The packaging bag according to any one of claims 1 to 7, wherein a recess is formed in a side seal portion near the lower side of the planned tear opening portion. The packaging bag according to any one of claims 1 to 8, wherein the front surface material and the back surface material are laminated bodies including a paper layer.

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