JP2018058618A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging capable of using a wide variety of laminates, and capable of securely closing a spout no matter what kind of laminate is used.SOLUTION: A rectangular packaging bag comprises: a front surface material 2 and a rear surface material 3 constituted of laminate, respective seal surfaces of both of which are opposed to each other, and both side edges 6a, 6b and a top edge 5 and a bottom edge 7 are sealed. A portion 16 to be torn opened is provided in a top part of one side edge 6a. The portion 16 to be torn opened is to open an unsealed part along inner side end edge of the side edge sealed part. Bar-shaped projections 12, 13 are provided at a substantially center part in a width direction of the front and the rear surface materials and also in a vicinity of seal part in the top edge.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag, and in particular, relates to a packaging bag excellent in the pouring property when storing liquid contents and the taking out property when storing granular contents.

  A flexible packaging bag made of a laminated material obtained by bonding various synthetic resins, paper, aluminum foil and the like into a bag shape is used for storing various contents. Among them, so-called standing pouches that contain liquid toiletries such as shampoos and rinses and are processed so as to be self-supporting are typical.

  Standing pouches containing shampoo, rinse, etc. are often used for refilling and are often transferred to regular bottle containers. However, these liquids often have a high viscosity, so that it takes time to pour out.

  Therefore, various techniques have been proposed for preventing the clogging of the spout and keeping the opening wide. The flexible bag described in Patent Document 1 is a packaging bag in which a folding portion is provided in a pour-out path so that the pour-out path greatly expands during pour-out.

  In the bag of Patent Document 2 and its manufacturing method, a packaging bag in which a pipe is attached to a pour-out path and its manufacturing method are described. Both the packaging bag described in Patent Document 1 and the packaging bag described in Patent Document 2 exhibit an effect in terms of improving the pouring property.

  However, the packaging bag described in Patent Document 1 requires a large apparatus for folding the packaging material into a predetermined shape in the bag making process, and has a drawback that the manufacturing process is complicated.

  Moreover, since the packaging bag described in patent document 2 needs a pipe separately in addition to a packaging material, there exists a problem that 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 also a problem that many sheets cannot be stacked in an orderly manner because only the thickness of the spout portion is thick.

  Therefore, in order to solve these problems, the applicant does not use any special material other than the packaging material, and does not require a large-scale manufacturing device. Various studies were conducted in order to propose a new packaging bag with a wide opening for the pouring path.

  Specifically, in the front and back materials of the packaging bag, the packaging that descends obliquely from the corner portion formed by the other side and the top side toward the lower end of the planned opening portion, and reaches the substantially central portion in the width direction. The first mountain fold line that protrudes outward from the bag, the first valley fold line that is concave from the end of the first mountain fold line to the lower end of the planned opening, and the opening that tears from the end of the first mountain fold line The first mountain fold line and the second mountain fold line by pressing down the substantially central part of the top side downward after opening the slit opening planned part. Is a folding bag, and the first valley fold line is folded into a valley fold, and the opening is opened in a rhombus shape or an inverted triangle shape.

This packaging bag does not use special materials such as pipes other than the packaging material, and does not require a large-scale manufacturing device. It is flat at the stage of the packaging bag, but the dispensing path is wide when dispensing. It has features. However, in order to obtain an inverted triangular opening simply by pressing the approximate center of the top down, the optimum range is narrow and subtle in terms of the hardness and stiffness of the laminated material constituting the packaging bag. It turned out to require adjustment.

  In other words, when the stiffness of the laminate is too strong, there is a problem that even if the pouch top surface portion is pressed during use, it cannot be completely pressed or returns to its original shape immediately. On the other hand, if the laminate is thin and the stiffness is weak, pressing the top of the pouch during use may cause it to break apart from the position where the opening is wide open, or the opening may be distorted. I'll be relaxed.

JP-A-4-215957 JP-A-5-132069

  The present invention is intended to solve the above-described problems, and the range of usable laminates is wide, so that the spout can be surely opened regardless of what laminate is used. A packaging bag is proposed.

  As a means for solving the above-mentioned problems, the invention according to claim 1 is a rectangular structure in which the sealing surfaces of the surface material and the back surface material made of a laminate are opposed to each other, and both the side, the top and the bottom are sealed. It is a shape-shaped packaging bag, and has a pre-scheduled opening portion at the upper part of one side, and the pre-scissed opening portion opens the unsealed portion along the inner edge of the side seal portion. The packaging bag is characterized by having a bar-shaped protrusion in the downward direction from the vicinity of the seal portion on the top side, in the substantially central portion in the width direction of the front and back materials.

  In the packaging bag according to the present invention, the bar-shaped protrusions serve as bones by providing the bar-shaped protrusions on the upper and lower surfaces of the front and back materials, so that the opening can be stably opened large.

  Further, the invention according to claim 2 is a rectangular structure in which a surface material and a back surface material are formed by using a folded portion that is folded with a sealing surface of one laminated body as an inside as a top side, and both sides and a bottom side are sealed. It is a shape-shaped packaging bag, and has a pre-scheduled opening portion at the upper part of one side, and the pre-scissed opening portion opens the unsealed portion along the inner edge of the side seal portion. The packaging bag is characterized by having a bar-shaped protrusion at a substantially central portion in the width direction of the front and back surfaces and downward from the vicinity of the folded portion.

  The invention described in claim 3 has a folding line for folding on the top side along the lower end of the sealing part on the top side, and can fold the sealing part on the top side. It is a packaging bag of description.

  In addition, the invention according to claim 4 has a pre-scheduled opening portion on one side upper part, and in the front and back materials, from the corner part formed by the other side and the top side, A first mountain fold line that protrudes obliquely toward the lower end and reaches the lower end of the bar-shaped protrusion, and protrudes outward from the packaging bag, and a second that extends from the lower end of the bar-shaped protrusion to the middle portion of the planned opening for tearing The first folding line and the second folding line are folded into a mountain fold by pressing down the approximate center part of the top side downward after opening the slit opening planned portion. The packaging bag according to any one of claims 1 to 3, wherein the portion opens in a rhombus shape or an inverted triangle shape.

  The invention according to claim 5 is characterized in that in the front and back materials, there is a third mountain fold line extending from the lower end of the rod-shaped protrusion to the bottom in the substantially central portion in the width direction. Or a packaging bag according to claim 1.

  The invention according to claim 6 is the packaging bag according to any one of claims 1 to 5, wherein the front surface material and the back surface material are laminates including a paper layer.

  Moreover, invention of Claim 7 has a folding piece in a base, It is a packaging bag of any one of Claims 1-6 characterized by the above-mentioned.

Further, in the invention according to claim 8, the pre-cut opening part is formed along a side part from which a part protrudes, and after the opening, a pour cylinder in which the opening part protrudes from the main body is formed. It is a packaging bag of any one of Claims 1-7 characterized by these.
The invention according to claim 9 is the packaging bag according to any one of claims 1 to 8, wherein the rod-shaped protrusion is a rod made of synthetic resin.
The invention according to claim 10 is the packaging bag according to any one of claims 1 to 8, characterized in that the rod-shaped protrusion is a thickened varnish containing a synthetic resin. is there.
The invention according to claim 11 is the packaging bag according to any one of claims 1 to 8, characterized in that the rod-shaped protrusion is an emboss provided on the laminate.

  The packaging bag according to the present invention is a substantially central portion in the width direction of the front and back materials, and a bar-shaped protrusion is provided downward from the vicinity of the seal portion on the top side, so that the opening portion to be cut is cut off. After forming, the bar-shaped protrusion plays the role of bone by pressing the top surface downward, and the opening of the opening can be kept wide. For this reason, the dispensing operation is stable and can be performed in a short time.

  Since the rod-shaped protrusions play the role of bone, they are less affected by the material of the front and back surfaces and the strength of the stiffness, and the range of usable face materials has expanded.

  When the surface material and the back material are formed by using the folded portion folded with the sealing surface of one laminate as the inner side as in the invention described in claim 2, there is no sealing portion on the top side. Therefore, there is an effect that the opening becomes large and easy to open.

  As in the invention described in claim 3, when the folding line for folding on the top side is provided along the lower end of the sealing part on the top side and the sealing part on the top side can be folded, when opening the opening, It becomes easy to perform an operation of pressing down the top and stabilizing the opening of the opening.

  Further, as in the invention according to claim 4, in the front and back materials, the rod-shaped member is lowered obliquely from the corner portion formed by the other side and the top side toward the lower end of the pre-scheduled opening portion. When the first fold line that protrudes outward from the packaging bag and reaches the lower end of the protrusion, and the second fold line that extends from the lower end of the rod-shaped protrusion to the intermediate portion of the planned opening portion, the opening However, while opening to a rhombus shape or an inverted triangle shape, opening is hold | maintained and extraction | pouring operation becomes still easier.

  Further, as in the invention according to claim 5, in the front and back materials, when a third mountain fold line extending from the lower end of the rod-shaped protrusion to the bottom side of the substantially central portion in the width direction is provided, the packaging bag main body expands. It becomes easy and has the effect of preventing the extension of the pouring time due to the adhesion of the front and back materials.

When the front surface material and the back surface material are laminated bodies including a paper layer as in the invention described in claim 6, not only the shape retention of the laminated body is good and the pouring property is increased, but also packaging. Since the bag is handled as a paper container, it is easy to dispose of the packaging bag after use.

  When the folding piece is provided on the bottom side as in the invention described in claim 7, the self-supporting property is given and the volume of the packaging bag is increased.

  As in the invention described in claim 8, when the pre-cut opening portion is formed along a side portion from which a part protrudes, and after opening, a pour cylinder in which the opening portion protrudes from the main body is formed. In this case, the operation of inserting and dispensing the dispensing cylinder into the bottle container is facilitated, and the convenience as a refill container is enhanced.

FIG. 1 is a perspective explanatory view showing the most basic embodiment of the packaging bag according to the present invention. FIG. 2 is an explanatory plan view showing an unopened state of the packaging bag shown in FIG. FIG. 3 is a perspective explanatory view showing another embodiment of the packaging bag according to the present invention. FIG. 4 is an explanatory plan view showing an unopened state of the packaging bag shown in FIG. 3. FIG. 5 is an explanatory perspective view showing another embodiment of the packaging bag according to the present invention. FIG. 6 is an explanatory plan view showing an unopened state of the packaging bag shown in FIG. FIG. 7 is an explanatory plan view showing another embodiment of the packaging bag according to the present invention. FIG. 8 is an explanatory plan view showing another embodiment of the packaging bag according to the present invention.

  Hereinafter, the packaging bag according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective explanatory view showing the most basic embodiment of the packaging bag according to the present invention, and FIG. 2 is a plan explanatory view showing an unopened state of the packaging bag shown in FIG. .

A packaging bag 1 according to the present invention is a rectangular packaging bag formed by sealing the side surfaces 6a and 6b, the top side 5 and the bottom side 7 with the sealing surfaces of the surface material 2 and the back surface material 3 made of a laminate facing each other. It is.
One side, in this figure, has a pre-tear opening 16 at the top of the left side 6a, and the pre-tear opening 16 opens the unsealed portion along the inner edge of the side seal. It is. The packaging bag 1 according to the present invention is characterized by having rod-shaped protrusions 12 and 13 in the vicinity of the top side seal portion, which is a substantially central portion in the width direction of the front and back materials 2 and 3.

  As shown in FIG. 1, the opening 18 is opened from the notch 17 for opening along the planned opening portion 16 to be opened, and the opening 18 is formed. Open wide.

  Thus, in the packaging bag which concerns on this invention, since the rod-shaped processus | protrusions 12 and 13 attached to the front and back materials play the role of bone, the materials and thicknesses of the front and back materials 2 and 3, the strength of the stiffness, etc. The wide opening 18 can be stably obtained without being influenced by the properties.

If the cut opening planned portion 16 is provided with scratches formed by a blade or a laser on the surface of the front and back materials, the opening can be smoothly opened along the scratches. An opening notch 17 may be provided in the opening start portion.

  3 is a perspective explanatory view showing another embodiment of the packaging bag according to the present invention, and FIG. 4 is a plan explanatory view showing an unopened state of the packaging bag shown in FIG. In the embodiment shown in FIGS. 3 and 4, the surface material 2 and the back surface material 3 are formed by using the folded portion 8 bent with the sealing surface of one laminated body as the top side 5, and both side sides 6a and 6b. A rectangular packaging bag having a bottom 7 sealed, having a side opening 16 in this case, a top opening 16 on the left side 6a. The unsealed portion is opened along the inner edge of the side seal portion 6a, is a substantially central portion in the width direction of the front and back surfaces, and has rod-shaped protrusions 12 and 13 downward from the vicinity of the folded portion 8. It is provided.

  In this embodiment, unlike the example shown in FIGS. 1 and 2, there is no seal portion at the top 5, so the opening 18 becomes easier to open.

  In the embodiment shown in FIGS. 3 and 4, the base 7 further has a folding piece 4. The folding piece 4 is an inverted V-shaped piece with the sealing surface of the laminated body facing outside, and is inserted between the surface material 2 and the back surface material 3, thereby expanding the bottom surface. It can be a bag. Moreover, the volume which can accommodate a packaging bag increases. The folded piece 4 may be referred to as a bottom tape.

  In addition, as the rod-shaped protrusions 12 and 13, a synthetic resin rod or a varnish containing a synthetic resin may be used. Moreover, what embossed the laminated body which comprises a packaging bag may be used.

  When a synthetic resin rod is used as the rod-shaped protrusion, the material and shape thereof are not particularly limited and are arbitrary, and the mounting method is not particularly limited. Either the outer surface or the inner surface of the front and back materials may be attached.

  When attaching the rod-shaped protrusions 12 and 13 to the inner surfaces of the front and back materials, if the sealant layers of the front and back materials are made of a material that can be heat-sealed, they can be easily attached by heat sealing. When attaching to the outer surface of the front and back materials, heat sealing may be applied to the outermost surface of the front and back materials, and an adhesive or a pressure sensitive adhesive may be used.

  The cross-sectional shape of the rod-shaped protrusions 12 and 13 is not particularly limited, but from the viewpoint of ease of mounting, the cross-sectional shape is a rectangular cross section or at least the mounting surface is flat rather than a circular or elliptical cross-sectional shape. It is desirable.

  Even when a thick varnish containing a synthetic resin is used as the rod-like protrusions 12 and 13, the material and shape thereof are not particularly limited and are arbitrary, and are attached to the outer surface or the inner surface of the front and back materials. Or either.

  As a varnish containing a synthetic resin, it is needless to say that the film after drying should be hard and durable in order to serve as a bone. Moreover, the thing whose solid content is as high as possible is desirable. In order to satisfy such requirements, an ultraviolet curable varnish having a solid content of 100% is preferably used.

  Even when the bar-shaped protrusions 12 and 13 are formed by embossing the laminated body constituting the packaging bag, the thickness and shape thereof are not particularly limited, and are convex on the outside of the packaging bag. Alternatively, it may have a convex shape on the inside. Moreover, the shape including both unevenness | corrugations may be sufficient.

  As a method for forming the emboss in the laminate, a method of hot pressing between male and female molds is common.

  FIG. 5 is a perspective explanatory view showing another embodiment of the packaging bag according to the present invention, and FIG. 6 is a plan explanatory view showing an unopened state of the packaging bag shown in FIG. The embodiment shown in FIGS. 5 and 6 is characterized in that it has a folding line 15 for folding on the top side along the lower end of the sealing part on the top 5 and the sealing part on the top 5 can be folded. .

By doing in this way, when the top 5 is pressed at the time of opening, the seal part of the top 5 falls easily and does not get in the way, and the opening is performed smoothly.
Further, in the front and back materials 2 and 3, the lower side 6 b and the top 5 are obliquely lowered from the corner formed by the top side 5 toward the lower end of the planned opening portion 16, and the lower ends of the rod-like protrusions 12 and 13 are formed. The first fold line 9 that protrudes outward from the packaging bag and the second fold line 10 that extends from the lower ends of the rod-shaped protrusions 12 and 13 to the middle part of the planned opening portion 16 for tearing.
After opening the slit opening planned portion 16 by opening, the first mountain fold line 9 and the second mountain fold line 10 are broken into mountain folds by pressing the substantially central portion of the top 5 downward, and the opening 18 has a rhombus shape. Or it is characterized by opening in the shape of an inverted triangle.

  In this example, the front and back materials 2 and 3 further have a third fold line 11 that extends from the lower end of the rod-shaped protrusions 12 and 13 to the bottom side 7 at the substantially central portion in the width direction. In addition, the base 7 has a folding piece 4.

  By providing the 1st mountain fold line 9 and the 2nd mountain fold line 10, the opening of the opening part 18 is maintained in a rhombus shape or an inverted triangle shape, and it becomes easy to perform the extraction | pouring operation | work. Further, by adding the third mountain fold line 11, the retainability of the opening shape is further enhanced.

  The most common method of forming the mountain fold lines on the front and back surfaces is to fold them by pressing them between male and female dies, but prior to pressing, make shallow scratches along the fold lines. You can keep it.

  In the embodiment shown in FIG. 7, the pre-cut opening portion 16 is formed along the side 6 c from which a part protrudes, and after opening, a pour cylinder in which the opening protrudes from the main body is formed. It is characterized by. In this example, an opening tab 19 and an opening notch 17 are provided in association with the planned opening portion 16 for opening. By doing in this way, when it is easy to open, when using it as a refill container, the extraction tube can be inserted into the refill container, so that the refilling operation can be performed safely and easily. .

  In the embodiment shown in FIG. 8, the surface material 2 and the back surface material 3 are formed with the folded portion 8 folded with the sealing surface of one laminated body inward as the top side, and the bottom side 7 has a folded piece. 4 is inserted, and the bottom part sealed in circular arc shape is provided. Such a structure of the bottom portion is common as a self-supporting packaging bag called a standing pouch.

  As a laminated body used for the surface material, the back surface material, and the folded piece of the packaging bag according to the present invention, a laminated body usually used for a flexible packaging bag bonded in combination with various synthetic resin films, aluminum foil, paper and the like. Can be used. As the substrate, paper, metal foil or synthetic resin film consisting of one layer 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), polyester resins such as polybutylene terephthalate resin (PBT), polyethylene naphthalate resin (PEN), cellulose resins such as cellophane and cellulose triacetate (TAC), polymethyl methacrylate (PMMA) resin, 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), fluorine-based resin, synthetic resin film such as urethane resins, paper, metal foil or the like alone or be used in combination. The substrate includes a printing layer and an adhesive layer as necessary.

  As the sealant layer used for the sealing surface, polyolefin resin is generally used. Specifically, low density polyethylene resin, medium density polyethylene resin, linear low density polyethylene resin, ethylene / vinyl acetate copolymer, Ethylene resins such as ethylene / α-olefin copolymers, polypropylene resins such as homopolypropylene resins, propylene / ethylene random copolymers, propylene / ethylene block copolymers, propylene / α-olefin copolymers, etc. are used. The In addition, a multilayer film in which these resins are combined 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. , Etc. When paper is used for a part of the laminated body, it becomes easy to bend, shape retention is improved, and an open state is easily maintained.

  The packaging bag according to the present invention is not only useful as a refill container for shampoos and rinses, but can also be preferably used as a container for storing foods such as granular snacks and hail, taking advantage of the fact that a large opening can be obtained. .

DESCRIPTION OF SYMBOLS 1 ... Packaging bag 2 ... Surface material 3 ... Back material 4 ... Folding piece 5 ... Top edge 6a ... Left side, 6b ... Right side, 6c ... -Protruding side 7 ... bottom 8 ... folded portion 9 ... first mountain fold line 10 ... second mountain fold line 11 ... third mountain fold line 12 ... rod-like protrusion 13 ... -Rod-like projection 15 ... Folding line 16 for folding on the top side ... Pre-cut opening 17 ... Opening notch 18 ... Opening 19 ... Opening tab

Claims (11)

It is a rectangular packaging bag formed by facing the sealing surfaces of the surface material and the back material made of a laminate, and sealing both sides, top and bottom,
There is a pre-scheduled opening portion on the upper side of one side, and the pre-scheduled opening portion is for opening the unsealed portion along the inner edge of the side seal portion,
A packaging bag having a bar-shaped projection in a downward direction from a vicinity of a seal portion on the top side, which is a substantially central portion in the width direction of the front and back materials. A rectangular packaging bag formed by forming a surface material and a back material with a folded portion folded with the sealing surface of one laminated body on the inside as a top side, and sealing both sides and a bottom side,
There is a pre-scheduled opening portion on the upper side of one side, and the pre-scheduled opening portion is for opening the unsealed portion along the inner edge of the side seal portion,
A packaging bag comprising a bar-shaped projection in a downward direction from the vicinity of the folded portion, which is a substantially central portion in the width direction of the front and back materials.   The packaging bag according to claim 1, wherein the packaging bag has a folding line for folding on the top side along the lower end of the sealing part on the top side and can fold the sealing part on the top side.   It has a slit opening planned part on the upper side part of one side, and in the front and back materials, it descends obliquely from the corner part formed by the other side and the top side toward the lower end of the slit opening planned part, A first fold line that protrudes outward from the packaging bag, and a second fold line that extends from the lower end of the rod-shaped protrusion to the middle part of the planned opening portion, and is scheduled to open. The first mountain fold line and the second mountain fold line are folded into mountain folds by pressing the substantially central part of the top side downward, and the openings are opened in a rhombus shape or an inverted triangle shape. The packaging bag of any one of Claims 1-3 characterized by the above-mentioned.   The packaging bag according to any one of claims 1 to 4, wherein the front and back surfaces have a third fold line extending from a lower end of the rod-shaped protrusion to a bottom side of a substantially central portion in the width direction.   The packaging bag according to any one of claims 1 to 5, wherein the front surface material and the back surface material are laminated bodies including a paper layer.   The packaging bag according to any one of claims 1 to 6, further comprising a folded piece on a bottom side.   8. The cut-off scheduled opening portion is formed along a side part from which a part protrudes, and after the opening, a pour cylinder in which the opening protrudes from the main body is formed. The packaging bag of Claim 1.   The packaging bag according to any one of claims 1 to 8, wherein the rod-shaped protrusion is a synthetic resin rod.   The packaging bag according to any one of claims 1 to 8, wherein the rod-shaped protrusion is formed by thickening a varnish containing a synthetic resin.   The packaging bag according to any one of claims 1 to 8, wherein the rod-shaped protrusion is an emboss provided on the laminate.

Images