JP2018043776A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new packaging bag that does not use a special material other than a packaging material, and also requires no large manufacturing apparatus, and whose discharge passage is flat in a packaging bag state, and is wide opened during discharging.SOLUTION: In a packaging bag 1, a folded-back part formed by folding a laminate is a top side, a front surface material 2 and a back surface material 3 are formed, and both sides 6a and 6b and a bottom side 7 are sealed. In a part 16 to be slit and opened, a non-sealed part is opened along an inner side end edge of a side seal part, a portion of the other side of the top side becomes a filling port 12, and the packaging bag is sealed after filling a content. The packaging bag has: a first mountain folding line 9 projected to the outer side of the packaging bag, ranging from a filling port side end part to a substantially central portion of a linear line which is lowered obliquely toward the lower end of the part to be slit and opened; and a second mountain folding line 10 ranging from an end point of the first mountain folding line to an intermediate portion of the part to be slit and opened. After the part to be slit and opened is opened, and the top side is pressed downward, the first mountain folding line and the second mountain folding line are folded in mountain fold, and an opening is opened in a substantially rhombic shape or a substantially inverted triangular shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag, and more particularly, to a packaging bag excellent in the pouring property when a liquid content is stored and the takeout property when a granular content is stored.

  A flexible packaging bag made of a laminated material obtained by bonding various synthetic resin films, paper, aluminum foil and the like into a bag shape is used to store 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.

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

  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. Also, there is no opening when filling the contents on the top side, like a packaging bag of a shape called a three-sided pouch that is formed by sealing one side of the sheet material with the top side as the top side and sealing both sides and the bottom side. For this reason, there is a problem that the filling process is complicated because the filling is performed from the bottom side or the side side, and the process for inserting the folded piece that forms the bottom surface on the bottom side is also 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.

  The present invention is intended to solve the above problems. The problem to be solved by the present invention is that a special material other than the packaging material is not used and a large-scale manufacturing apparatus is not required, and it is flat at the stage of the packaging bag. The present invention proposes a new packaging bag that can be filled with contents from the top side.

As means for solving the above problems, the invention according to claim 1
A rectangular shape in which the folded portion with the sealing surface of the laminate laminated inside is used as the top side, the surface material and the back surface material are formed, and the side seal portion and the bottom seal portion are formed by sealing both sides and the bottom. Packaging bag,
It has a slit opening planned portion on the upper side part of one side, the slit opening planned portion is to open the unsealed portion along the inner edge of the side seal portion,
A part of the side of the other side of the top side is opened to become 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 surfaces, the first mountain fold line that protrudes outward from the packaging bag from the filling port side end portion of the folded portion to the substantially central portion of a straight line that descends obliquely toward the lower end of the planned opening portion for tearing. And a second mountain fold line extending from an end point of the first mountain fold line to an intermediate portion of the planned opening portion for cutting, and after opening the opening portion by cutting the planned opening portion, the top edge on the substantially central portion is pressed. Thus, 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 portion is opened in a substantially rhombus shape or a substantially inverted triangle shape.

The invention according to claim 2
2. The packaging bag according to claim 1, wherein the pre-cut opening portion is skewed with the top side being further away from the inner end side.

The invention according to claim 3
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 material. This is a packaging bag.

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

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

The invention according to claim 6
It is a packaging bag of any one of Claims 1-5 which has a folding piece in a base.

The invention according to claim 7
The said opening part to be opened is formed along the side part which one part protruded, and after opening, the opening part forms the extraction | pipe cylinder which protruded from the main body, Any one of Claims 1-6 characterized by the above-mentioned. Or a packaging bag according to claim 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 in the vicinity of the lower portion of the planned opening for tearing.

The invention according to claim 9 is
The packaging material 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 a single laminated body to form the top and front and back materials, and sealing and sealing the contents after filling from the filling port that opens a part of the top. By simply processing only a few fold lines on the front and back materials, and opening the cut opening planned part, pressing the top part makes the top part flat because there is no seal part on the top part. Since the opening is easy to open in a substantially rhombus shape or a substantially inverted triangular shape, a large area opening can be obtained. Therefore, since no special material is used other than the packaging material, the material cost is not increased. Furthermore, since it is flat at the stage of the unfilled packaging bag, the stackability at the feeder part of the filling machine is also good, and the filling port is on the top side, so no special equipment is required for filling the contents. It can be carried out.

  As in the second aspect of the present invention, when the planned opening for tearing is skewed, it is easy to observe the condition of the extraction and the amount of the extraction is easily adjusted.

  When the third mountain fold line extending 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 is provided as in the invention according to claim 3, when the top is pressed after opening The packaging bag easily swells along the fold line, and the opening also easily swells.

  If an opening knob is provided in the side seal portion of the planned opening for tearing as in the invention described in claim 4, there is little risk of mistaking the tearing position, and tearing can be performed easily.

  If a notch is provided on the side seal portion of the planned opening for tearing from the outside as in the invention described in claim 5, there is little risk of mistaking the tearing position, and the tearing can be reliably continued to the planned opening for tearing. it can.

  When the packaging bag has a folded piece on the bottom side as in the invention described in claim 6, it can be a self-supporting packaging bag.

  As in the invention described in claim 7, the pre-cut opening portion is formed along the side part from which a part protrudes, and after opening, the opening part forms a pour tube in which the main body protrudes from the main body. In this case, it is easy to open the container, and when used as a refill container, the dispensing tube can be inserted into the refill container, so that the refilling operation can be performed safely and easily.

  If the recess is formed in the side seal portion in the vicinity of the lower part of the planned opening for tearing as in the invention described in claim 8, the deformation that occurs when the top is pressed tends to concentrate on the opening. The opening can be expanded more effectively, and when used as a refill container, the contents can be poured out by hooking a recess into the mouth of the refill destination container, making it difficult to overflow, and adjusting the amount dispensed. It becomes easy to do.

  As in the ninth aspect of the invention, when the front surface material and the back surface material are a laminate including a paper layer, the shape retention is improved and the open state is easily maintained.

It is a perspective explanatory view showing one embodiment of a packaging bag concerning the present invention. FIG. 2 is an explanatory plan view showing an unused state of the packaging bag shown in FIG. 1. It is the plane explanatory view showing other embodiments of the packaging bag concerning the present invention. It is plane explanatory drawing which showed the packaging bag which pinched | interposed the folding part which concerns on this invention. FIG. 5 is an explanatory perspective view of a state in which a planned opening portion of the packaging bag shown in FIG. 4 is cut. It is plane explanatory drawing which showed the packaging bag which made a part of side edge | side protruded concerning this invention. It is plane explanatory drawing which showed the packaging bag which provided the recess in a part of side part which concerns on this invention. FIG. 8 is an enlarged explanatory view showing an embodiment of a planned opening portion of the packaging bag shown in FIG. 7.

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

  FIG. 1 is an explanatory perspective view showing an embodiment of a packaging bag 1 according to the present invention, and is a view showing a state in which the contents are opened after sealing. 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 top material 2 and the back material 3 are formed with the folded portion 8 folded with the sealing surface of one laminated body inside, and the side sides 6a and 6b and the bottom side 7 are formed. It is a rectangular packaging bag formed by sealing. A slit opening planned portion 16 is provided on one side, that is, on the upper side of the left side 6a in FIG. The planned opening for tearing 16 opens the unsealed portion along the inner edge of the side seal portion. In addition, what is necessary is just to design suitably the width | variety of the top-and-bottom direction of the scheduled opening part 16 according to the magnitude | size of the inlet of a refilling destination container, when using as a container for refilling.

  If the planned opening portion 16 is a weakened line formed by scratching the surface of the front and back materials with a known means such as a blade or laser light, it can be easily opened along the weakened line. is there. The tear opening planned portion 16 may be parallel to the side seal portion, but if it is skewed as shown in FIG. 2, the cut end of the opening becomes slanted, and when the contents are poured out, It is preferable because the appearance can be easily observed and the dispensing can be easily adjusted. An opening notch 17 may be provided at the opening start portion. In addition, it is preferable to provide an opening tab 14 as a handle at the opening start portion.

  In addition, a part of the side of the other side of the top side is cut and opened when the bag is not used, and serves as a filling port 12 for contents. After filling the contents from the filling port 12, the opened portion is sealed to seal the bag. It is preferable to seal the boundary portion between the filling port 12 and the turn-back portion 8 with the boundary seal portion 5 because there is less possibility that the tear will progress to the tear opening planned portion 16 side due to a problem during handling before sealing. . FIG. 1 shows a state where the filling port 12 is sealed.

  Furthermore, the packaging bag 1 which concerns on this invention is the substantially center of the straight line which descends diagonally toward the lower end of the tearing opening plan part 16 from the edge part by the side of the boundary seal | sticker part 5 of the folding | returning part 8 in the front and back materials 2 and 3. The first mountain fold line 9 that protrudes outward from the packaging bag and the 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 opening portion 16 is provided. .

  After cutting and opening the planned opening 16, the first mountain fold line 9 and the second mountain fold line 10 are folded into mountain folds by pressing down the top edge of the substantially central portion, and the openings are opened as shown in FIG. The part 18 opens in a substantially inverted triangular shape, or in a substantially rhombic shape depending on whether the pressing is performed. Since there is no seal part at the top, it is easy to press. Moreover, although the said substantially center part pressed down becomes a valley fold shape naturally from the relationship of the shape of the 1st mountain fold line 9 and the 2nd mountain fold line 10, the end point of the 1st mountain fold line 9 of a front and back is tied to this site | part. A valley fold line 15 may be provided in advance. In the following drawings, the mountain fold line is indicated by a solid line, and the valley fold line is indicated by a one-dot chain line.

Thus, the packaging bag 1 which concerns on this invention can obtain the opening part 18 of a large area at the time of opening by simple process which only forms two fold lines in the front and back materials 2 and 3, respectively. The most common method for forming a fold line on the front and back surfaces is to press and fold between male and female molds, but prior to pressing, make a shallow scratch along the fold line. You can leave it.

  In addition, since the filling port 12 is provided on the top side, the present invention can be applied to a general filling device as it is when filling the contents of the bag, and can be performed without providing a special mechanism. In order to seal the filling port 12 after filling, it can be sealed by a method such as normal heat sealing similarly to the side sides 6a and 6b and the bottom side 7.

  FIG. 3 is an explanatory plan view showing another embodiment of the packaging bag 1 according to the present invention. In this embodiment, in the front and back materials 2 and 3, the first mountain fold line 9 and the second mountain fold line 10. A third mountain fold line 11 is provided that extends from the crossing point to approximately the center of the packaging bag 1.

  In this way, when the third mountain fold line 11 is provided, when the top side is pressed after the tear opening planned portion 16 is cut and opened, the packaging bag 1 is easily expanded along the broken line, and the opening 18 is also easily expanded. 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 side to the bottom side 7 at the approximate center 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 FIG. 4 and FIG. 5, the surface material 2 and the back surface material 3 are formed with the folded portion 8 bent with the sealing surface of one laminated body inward as in FIG. 1, A rectangular packaging bag having a filling port 12 formed by sealing both sides 6a and 6b and the bottom 7 is formed, and the bottom 7 is a folded piece folded in an inverted V shape with the sealing surface of the laminated body facing outward. 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. The folded piece may be referred to as a bottom tape. FIG. 4 is an explanatory plan view showing an unused state, and FIG. 5 is a diagram for explaining a state in which the packaging bag of FIG. 4 is actually used. The filling port 12 is sealed and the planned opening portion 16 is opened. It is a perspective explanatory view showing a mode in which an opening 18 is formed by pressing down the top of the cut.

  In the embodiment shown in FIG. 6, the planned opening 16 is formed along the side 6c from which a part protrudes, and after the opening, a pour cylinder 19 whose opening protrudes from the main body is formed. It is characterized by that. In this example, an opening tab 14 and an opening notch 17 are provided in association with the planned opening portion 16 for opening. In this way, it becomes easy to open the container, and when used as a refill container, the extraction tube 19 can be inserted deeper into the container port of the refill destination, so that the refilling operation can be performed safely and reliably. become.

  In the embodiment shown in FIG. 7, the recess 13 is formed in the side seal portion in the vicinity of the lower portion of the planned opening portion 16. Due to the presence of the recess 13, deformation that occurs when the top is pressed after opening is restricted by the seal portion of the recess 13 and is concentrated in the range indicated by the arrow B in FIG. 8, and the opening 18 is more effectively widened. In addition, when used as a refill container, the contents can be poured out by hooking the recess 13 into the mouth of the refill destination container. It becomes easy to adjust the amount. Further, compared with the embodiment shown in FIG. 6, there is no portion projecting to the side, so handling is easy.

  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 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), 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 ... Boundary seal part 6a ... Left side, 6b ... Right side, 6c・ ・ ・ Projected side 7 ・ ・ ・ Bottom side 8 ・ ・ ・ Folding part 9 ・ ・ ・ First mountain fold line 10 ・ ・ ・ Second mountain fold line 11 ・ ・ ・ Third mountain fold line 12 ・ ・ ・ Filling port 13. ..Recess 14 ... Opening tab 15 ... Valley fold line 16 ... Scheduled opening planned portion 17 ... Opening notch 18 ... Opening portion 19 ... Pouring tube 20 ... Fourth mountain fold line

Claims (9)

A rectangular shape in which the folded portion with the sealing surface of the laminate laminated inside is used as the top side, the surface material and the back surface material are formed, and the side seal portion and the bottom seal portion are formed by sealing both sides and the bottom. Packaging bag,
It has a slit opening planned portion on the upper side part of one side, the slit opening planned portion is to open the unsealed portion along the inner edge of the side seal portion,
A part of the side of the other side of the top side is opened to become 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 surfaces, the first mountain fold line that protrudes outward from the packaging bag from the filling port side end portion of the folded portion to the substantially central portion of a straight line that descends obliquely toward the lower end of the planned opening portion for tearing. And a second mountain fold line extending from an end point of the first mountain fold line to an intermediate portion of the planned opening portion for cutting, and after opening the opening portion by cutting the planned opening portion, the top edge on the substantially central portion is pressed. By doing so, the said 1st mountain fold line and the 2nd mountain fold line fold into a mountain fold, and an opening part opens in a substantially rhombus shape or a substantially inverted triangle shape, The packaging bag characterized by the above-mentioned.   2. The packaging bag according to claim 1, wherein the top portion of the tear opening is skewed with the top side away from the inner end side.   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 material. Packaging bags.   The packaging bag according to any one of claims 1 to 3, wherein an opening knob is provided on a side seal portion of the planned opening for tearing.   The packaging bag according to any one of claims 1 to 4, wherein a notch is provided from the outside in the side seal portion of the planned opening for tearing.   The packaging bag according to any one of claims 1 to 5, further comprising a folded piece on a bottom side.   The said opening part to be opened is formed along the side part which one part protruded, and after opening, the opening part forms the extraction | pipe cylinder which protruded from the main body, Any one of Claims 1-6 characterized by the above-mentioned. The packaging bag of Claim 1.   The packaging bag according to any one of claims 1 to 7, wherein a recess is formed in a side seal portion in the vicinity of the lower portion of the planned opening for tearing.   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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