JP2016169030A - Wrapping container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wrapping container which has a high self-standing property and extraction easiness while being able to be easily crushed after use for reduction of volume, and can employ a shape of high ornamental design due to high flexibility in shape.SOLUTION: A wrapping container is formed by bending a sheet material, overlapping end edges with each other, and sealing to form a housing part, having a self-standing property. A bottom part of the wrapping container is formed by folding into the housing part of an end edge including one end of a bending point of the sheet material. A side surface of the wrapping container has a bend part which bends in such a manner as a bending point of the sheet material swells toward the outside of the housing part by folding.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging container having self-supporting properties.

  A sheet material obtained by laminating a paper base layer, a thermoplastic resin sealant layer, and a barrier layer such as an aluminum foil or aluminum vapor deposited film between them is folded into a box shape, A paper packaging container manufactured by overlapping and sealing parts is known. There are various forms of paper packaging containers, but a brick type (Patent Document 1) having a rectangular parallelepiped shape and a gable top type (Patent Document 2) having a gable roof type roof plate are widely known. ing.

  Also, two side films that have a certain rigidity and contain a resin such as polyethylene terephthalate or aluminum are overlapped, and a bottom film folded in half is inserted between the side films from the crease side, and the peripheral edge is sealed. A flexible packaging container formed in this manner is known (Patent Document 3).

JP-A-7-89535 JP 2012-166696 A JP 2014-122057 A

  Bottles, cans, plastic bottles, paper packaging containers, flexible packaging containers, and the like are widely used as packaging containers for liquids and the like. Bottles, cans and plastic bottles are all easy to handle due to the high rigidity of the materials used, and the contents can be poured out easily. On the other hand, since these packaging containers are difficult to be crushed or disassembled, there is a problem that the volume of dust cannot be reduced.

  Since the paper packaging container and the flexible packaging container use a flexible material such as paper or film, they can be easily crushed at the time of disposal and can be reduced in volume. On the other hand, in order to make paper packaging containers self-supporting, a box-shaped shape is often adopted, and the degree of freedom in shape is low, and it is difficult to adopt a shape with high design properties. Moreover, the flexible packaging container has low rigidity due to the flexibility of the film, and the contents may not be easily poured out.

  The present invention has been made in view of the above problems, and can be easily crushed after use and can be reduced in volume, yet has high independence and ease of extraction, and has a high degree of freedom in shape. It aims at providing the packaging container which can employ | adopt a shape with high designability.

  One aspect of the present invention for solving the above problems is a self-supporting packaging container in which a sheet material is bent and each end edge is overlapped and sealed to form a housing portion, and the bottom of the packaging container is The side edge of the packaging container is formed by folding the edge including one end of the folded portion of the sheet material inward of the housing portion, and the folded portion of the sheet material is directed outward from the housing portion by folding. It is a packaging container which has a curved part which curves so that it may swell.

  In another aspect of the present invention, the step of folding the sheet material and overlapping each edge, the step of sealing the edge including one end of the folded portion of the sheet material, and the sealed edge, By folding between the folded sheet materials, the bottom portion is formed, and at least a part of the folded portion of the sheet material is bent so as to bulge, and the curved portion is formed; And a step of sealing the edge.

  According to the present invention, after use, it can be easily crushed and its volume can be reduced, but it has high independence and ease of pouring, and it can adopt a shape with high designability due to the degree of freedom of shape. A packaging container can be provided.

The front view, side view, sectional view, and perspective view of the packaging container according to the embodiment of the present invention The development view of the blank concerning the embodiment of the present invention Sectional drawing which represents typically the sheet | seat material which concerns on embodiment of this invention. The figure which shows the manufacturing method of the packaging container which concerns on embodiment of this invention. The figure which shows the manufacturing method of the packaging container which concerns on embodiment of this invention. The figure which shows the manufacturing method of the packaging container which concerns on embodiment of this invention. The figure which shows the modification of the packaging container which concerns on embodiment of this invention The figure which shows the modification of the packaging container which concerns on embodiment of this invention

(Packaging container)
FIG. 1A shows a front view, a side view, and a cross-sectional view along the line AA ′ shown in the side view of the packaging container 100 according to an embodiment of the present invention in an upright state. FIG. 1B is a perspective view.

  The container 101 of the packaging container 100 is formed by bending a blank 200 obtained by processing a sheet material 300 described later, and overlapping and sealing each end edge. The bottom portion 102 of the packaging container 100 is formed by folding an end edge including one end of a bent portion of the sheet material 300 inward of the housing portion 101. The side surface 103 of the packaging container 100 has a curved portion 104 that bends so that the folded portion of the sheet material 300 bulges toward the outside of the housing portion 101 by folding.

  As shown in FIG. 1, the packaging container 100 includes a planned opening portion 108 above the curved portion 104 when it is erected. A top seal 105 is formed at the upper edge of the accommodating portion 101, a side seal 106 is formed at the edge of the side opposite to the curved portion 104, and a bottom seal 107 is formed at substantially the center of the bottom portion 102. Note that the bottom portion 102 is housed by being folded inward of the housing portion 101.

  The packaging container 100 has a notch 109 formed downward from the upper end. When extracting the contents of the packaging container 100, the user opens the planned opening portion 108 by cutting the top seal 105 located above the planned opening portion 108 from the notch 109, and then the top seal. 105, the side seal 106 or the periphery thereof is grasped, and the packaging container 100 is tilted toward the curved portion 104 side.

  Since the packaging container 100 has the curved portion 104, the grounding cross section of the accommodating portion 101 can be secured widely, and high self-supporting properties are provided. In addition, since the planned opening portion 108 is provided above the curved portion 104 with a certain inner diameter, the contents stay around the side seal 106 in the packaging container 100 when the contents are poured out. It is poured out smoothly.

(blank)
In FIG. 2, the expanded view of the blank 200 used for manufacture of the packaging container 100 is shown. The blank 200 is formed by punching a sheet material 300 described later into a line-symmetric shape. Moreover, the blank 200 is comprised from the side part 201 which comprises the side surface 103, and the bottom face part 202 which comprises the bottom part 102, and is provided with the seal part 203 heat-sealed in the outer peripheral edge part shown by hatching. A notch 109 is formed at the upper end of the side part 201. It is preferable that a notch 204 is formed at the intersection between the edge of the bottom surface portion 202 and the symmetry line.

(Sheet material)
In FIG. 3, the schematic cross section of the sheet material 300 used for the blank 200 is shown. The sheet material 300 includes a first sealant layer 301 / printing layer 302 / paper base layer 303 / first adhesive layer 304 / barrier layer 305 in order from the outer side to the inner side of the packaging container 100. / Second adhesive layer 306 / second sealant layer 307.

  For the first sealant layer 301 and the second sealant layer 307, HDPE, MDPE, LDPE, LLDPE, or the like can be used. Further, there may be a layer partially containing polybuden. The first sealant layer 301 may not be formed when the outer surfaces of the blank 200 are not sealed.

For the paper base layer 303, paperboard such as milk carton base paper can be used. The basis weight and density can be appropriately selected depending on the capacity and design of the container. From the viewpoint of sufficient rigidity and resource saving, the basis weight is preferably 150 g / m ² or more and 500 g / m ² or less, and the density is preferably 0.6 g / cm ³ or more and 1.1 g / cm ³ or less.

The first adhesive layer 304 and the second adhesive layer 306 are layers made of a polyolefin resin or an adhesive. For polyolefin resin, polyethylene resin such as HDPE, MDPE, LDPE, LLDPE, ethylene / methacrylic acid copolymer (EMAA), ethylene / acrylic acid copolymer (EAA), ionomer, polypropylene (PP), etc. are used. It can be bonded by extrusion or the like. In this case, the layer thickness is preferably 10 μm or more and 60 μm or less. When the thickness is less than 10 μm, corona treatment, ozone treatment, anchor coating, or the like may be performed on the surface of the paper base layer 303 or the barrier layer 305 in order to increase the adhesive strength. As the adhesive, a dry laminate adhesive, a non-solvent laminate adhesive, or the like can be used. The coating amount is preferably 0.5 g / m ² or more and 7.0 g / m ² or less.

  The barrier layer 305 is a vapor-deposited film including a vapor-deposited layer obtained by vapor-depositing a metal such as aluminum, silica, alumina and the like, and a base film such as polyethylene terephthalate (PET), and a metal foil such as aluminum based on PET, nylon, PP or the like. A laminated film dry-laminated on a material film, a barrier-coated polyethylene terephthalate film obtained by applying a barrier coating to a polyethylene terephthalate film, or a barrier film made of a barrier material such as EVOH can be used. In the case of a deposited film, the layer thickness of the deposited layer is preferably 5 nm to 100 nm, and the layer thickness of the base film is preferably 6 μm to 25 μm. In the case of a laminated film, the metal foil preferably has a thickness of 5 μm to 15 μm, and the base film has a thickness of 6 μm to 25 μm.

(Manufacturing method of packaging container)
Below, the manufacturing method of the packaging container 100 which concerns on embodiment of this invention is demonstrated with reference to FIGS.

  First, blank 200 is created by punching sheet material 300. The blank 200 is bent along a symmetry line, and the seal portions 203 are overlapped. Thereafter, a part of the seal part 203 of the side face part 201 is overlapped and sealed to form a part of the side seal 106. FIG. 4A shows a state where the blank 200 is bent, and FIG. 4B shows a front view and a side view of the blank 200 in which a part of the side seal 106 is formed. In FIG. 4 (b), the sealed range is indicated by hatching. Also in FIGS. 5 and 6, the same hatching is given to portions where sealing is performed in each step. In this step, since the bottom surface portion 202 is folded in a bottom reversing step described later, about the lower half near the bottom surface portion 202 is not sealed among the portions where the side seal 106 is to be formed.

  Next, the seal part 203 at the lower end of the bottom part 202 is sealed to form the bottom seal 107. FIG. 5A shows a front view and a side view of the blank 200 on which the bottom seal 107 is formed.

  Next, the bottom part 102 is formed by folding the bottom part 202 between the folded side parts 201. FIG. 5B shows a front view, a side view, and a cross-sectional view along the line B-B ′ shown in the side view of the blank 200 in which the bottom surface portion 202 is folded. By bending the bottom surface portion 202, a curved portion 104 that is curved so as to bulge outward from the housing portion 101 is formed at the side end of the side surface portion 201 opposite to the side seal 106. It is preferable to fold the bottom surface portion 202 until the bottom seal 107 completely enters between the side surface portions 201 so as not to hinder the self-supporting of the packaging container 100. By providing the notch 204 in the blank 200, when the bottom surface portion 202 is folded, the side surface portion 201 and the bottom surface portion 202 can be hardly interfered with each other, so that the bottom portion 102 can be easily formed.

  Next, among the portions where the side seal 106 is to be formed on the side surface portion 201, the unsealed portion is sealed to form the side seal 106. FIG. 6A shows a front view, a side view, and a cross-sectional view of the side seal 106 taken along line C-C ′ shown in the side view, in which the side seal 106 is formed. By forming the side seal 106, the side end portion of the bottom surface portion 202 that is folded inside the side surface portion 201 in the bottom inversion process is fixed inside the side surface portion 201. Note that, as shown in the enlarged cross-sectional view of FIG. 6A, the outer surfaces of the folded bottom portion 202 are sealed by the first sealant layer 301 at the lower end of the side seal 106. Moreover, as shown as a modified example in FIG. 6A, the first sealant layer 301 is not formed on the sheet material 300, and the outer surfaces of the folded bottom portion 202 need not be sealed.

  Next, the blank 200 is filled with contents not shown. Thereafter, the upper end of the side part 201 is sealed to form the top seal 105. FIG. 6B shows a front view and a side view of the packaging container 100 in a state where the top seal 105 is formed. The packaging container 100 is manufactured as described above. In addition, the manufacturing method of the packaging container 100 is not limited to the above-mentioned method, for example, after forming the bottom face part 202 between the folded side parts 201 without forming a part of the side seal 106 in advance. The entire side seal 106 may be sealed.

(Modification of packaging container)
If the bottom part 102 is folded inside the accommodating part 101 and the accommodating part 101 is provided with the curved part 104, the packaging container 100 can employ | adopt various modifications. 7 and 8 show packaging containers 120, 130, 140, 150, 160, 170, and 180 which are modifications of the packaging container 100.

  For example, as shown in FIG. 7A, a round portion 110 in which the upper end of the side seal 106 is formed in an arc shape may be provided to enhance the design. Moreover, as shown in FIG. 7B, a stopper 111 capable of closing the inside and the outside of the packaging container 100 may be provided at the planned opening location 108 so that the packaging container can be used repeatedly. Further, as shown in FIG. 7C, a strength weakening line 112 may be provided on the top seal 105 instead of the notch 109. Moreover, as shown in (d) of FIG. 7, the design opening property may be enhanced by providing a planned opening portion 108 above the curved portion 104 so as to resemble the shape of the spout of the teapot.

  Further, as shown in FIG. 8A, a spout stopper 111 may be provided above the curved portion 104 of the side surface 103. Further, as shown in FIG. 8B, a hole 113 is provided in which a part of the sheet material 300 forming the top seal 105 is punched and a user can put a finger to suspend the packaging container 170. Also good. Further, as shown in FIG. 8C, the top seal 105 is formed by sealing the sheet material with the sheet material folded into the side seal 106 above the curved portion 104, and can be opened and closed after opening. A spout 114 may be provided.

  Moreover, although the packaging container provided with the opening expected location 108 above the bending part 104 was shown as embodiment and its modification, you may provide an opening expected location above the side edge in the side without the bending part 104. . In this case, the user grasps the bending portion 104 when the contents are poured out. Since the curved portion 104 is formed using a sheet material 300 made of paper and having a certain rigidity so as to bulge outward from the housing portion, the user holds the curved portion 104. Easy and easy to dispense contents.

  Further, as the sheet material 300, a film having a certain rigidity including a resin such as PET or aluminum other than a paper base material can be used.

  As described above, the present packaging container 1 can be easily crushed after use and can be reduced in volume, yet has high self-supporting property and ease of pouring, and has a high degree of freedom in design. High shape can be adopted.

  The present invention is useful for a paper packaging container or the like that contains a liquid or the like.

100, 120, 130, 140, 150, 160, 170, 180 Packaging container 101 Storage portion 102 Bottom portion 103 Side surface 104 Curved portion 105 Top seal 106 Side seal 107 Bottom seal 108 Scheduled opening 109 Notch 110 Round portion 111 Plug 112 Strength Weakening line 113 Hole 114 Spout 200 Blank 201 Side face part 202 Bottom face part 203 Sealing part 204 Notch 300 Sheet material 301 First sealant layer 302 Print layer 303 Paper base material layer 304 First adhesive layer 305 Barrier layer 306 Second adhesive layer 307 Second sealant layer

Claims (5)

It is a packaging container having a self-supporting property in which a sheet material is bent and each end edge is overlapped and sealed to form a housing part,
The bottom portion of the packaging container is formed by folding the edge including the one end of the folded portion of the sheet material into the housing portion,
A side surface of the packaging container is a packaging container having a curved portion that is bent by the folding so that a bent portion of the sheet material swells outward of the housing portion.   The packaging container according to claim 1, wherein the sheet material is formed by laminating a resin film layer on a paper base material layer.   The packaging container according to claim 1, wherein the packaging container includes a planned opening portion above the curved part when the container is erected, and the dispensing proceeds by being inclined toward the curved part.   The packaging container according to claim 3, further comprising a scheduled opening portion stopper capable of closing the inside and the outside of the packaging container as the planned opening location. Bending the sheet material and superimposing each edge;
Sealing the edge including one end of the bent portion of the sheet material;
By folding the sealed edge between the folded sheet materials, a bottom portion is formed, and at least a part of the bent portion of the sheet material is curved to form a curved portion. Process,
And a step of sealing the other edge of the sheet material.

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