JP2020011768A - Pouch with opening holding member - Google Patents

Abstract

To propose a standing pouch that can be used for drinking or eating because its opening is clean and can be held open by means of a simple structure.SOLUTION: A standing pouch is formed in such a manner that two laminated bodies 2a, 2b, front and rear, each of which has a base material layer 11 and a sealant layer 12, are disposed opposite to each other, a bottom tape 3 folded into an inverted V shape is inserted into a lower space between the front and the rear such that the respective sealing layers of the laminated bodies having the base material layers and the sealant layers face outside, and peripheral edges are heat sealed. In the standing pouch, an opening line 4 is formed in the respective upper parts of the front and rear laminated bodies, a belt-like shape holding member 8 is welded to the sealant layer of the front or rear and immediately below the vicinity of the opening line, and the opening line 4 is a half-cut line formed in the base material layer of each laminate body by laser processing. Thus, a pouch having an opening holding member is obtained.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag, and more particularly to a packaging bag (pouch) in which an opening is held in an opened state after unsealing so that stored items can be easily taken out.

  Packaging bags made of flexible packaging materials are used for various purposes. Above all, a packaging bag of a type generally called a standing pouch, in which the sealant layers of two continuous sheets are opposed to each other, and a bottom tape folded with the sealant layer outside is inserted and the periphery is heat-sealed, It is widely used mainly in the toiletry field because it has a large capacity, is self-supporting, and has a good display effect at stores (see Patent Document 1).

  When storing side dishes such as hamburger steaks in a standing pouch, the open mouth is not kept open, so tableware does not go in and out properly, hands get dirty when removing contents, and contents may be removed. There was a problem that made it difficult to remove.

  In addition, since the cut is not always cut linearly when opened, there is a problem in that the contents adhere to the opening during eating, and tableware hits the opening. In addition, if the opening is not linear, there is a problem that the cosmetic quality is poor.

  Under such circumstances, there are many problems in using the conventional standing pouch as it is as a tableware for eating.

  On the other hand, a cup-shaped container is far superior to a packaging bag in terms of takeout properties and the beauty of the opening, but has problems in that it is costly and bulky when disposed.

JP 2006-96388 A

  The problem to be solved by the present invention is that a standing pouch has a clean opening and can be kept open by a simple structure, so that the standing pouch can also be used for eating. Suggest a pouch.

  As means for solving the above-mentioned problems, the invention according to claim 1 has a structure in which the sealant layers of two laminated bodies each having a base material layer and a sealant layer are opposed to each other, and a base material layer is provided therebetween. A standing pouch in which a bottom tape bent into an inverted V-shape with the sealant layer of the laminate having the sealant layer on the outside is inserted and the peripheral portion is heat-sealed, and a scheduled opening line is formed at the top of the front and back laminate. A band-shaped shape holding member is welded to either the front or back sealant layer immediately below the vicinity of the scheduled opening line, and the scheduled opening line is formed by a laser processing half formed on the base material layer of the laminate. A pouch with an opening holding member, which is a cut line.

  In the pouch with the opening holding member according to the present invention, since the band-shaped shape holding member is welded to the vicinity of the opening scheduled line serving as the opening, the opening can be held in an open state.

  The invention according to claim 2 is a sealant of a laminate having a base material layer and a sealant layer below the sealant layer of the front and back laminate having the base material layer and the sealant layer. A standing pouch in which a bottom tape bent into an inverted V-shape with the layer outside is inserted and the peripheral edge is heat-sealed, and has a scheduled opening line at the top of the front and back laminates. An opening characterized in that a strip-shaped shape holding member is welded to the sealant layers on both front and back surfaces immediately below the vicinity, and the scheduled opening line is a half-cut line formed by laser processing on the base material layer of the laminate. It is a pouch with a holding member.

  According to a third aspect of the present invention, the two shape retaining members welded to the sealant layer surfaces on the front and back surfaces near the scheduled opening line are welded to vertically shifted positions so as not to abut. The pouch with an opening holding member according to claim 2, characterized in that:

  According to a fourth aspect of the present invention, there is provided an opening holding member according to any one of the first to third aspects, wherein the width of the upper portion of the laminate constituting the front and back surfaces is wider than the bottom portion. It is a pouch.

  According to a fifth aspect of the present invention, the shape holding member includes a high-density polyethylene resin strip stretched in a longitudinal direction, and the opening is held according to any one of the first to fifth aspects. It is a pouch with a member.

  In the pouch with the opening holding member according to the present invention, since the band-shaped shape holding member is welded to the vicinity of the scheduled opening line serving as the opening, the shape holding member acts as the opening holding member for holding the opening in the opened state. Therefore, it is easy to take out the contents.

  Since the shape holding member is provided in a direction parallel to the line to be opened, it is parallel to the flow direction of the laminate, and can be continuously welded and attached to the laminate. For this reason, the winding of the laminate can be directly applied to the bag making machine.

  Further, since the scheduled opening line is a half-cut line formed on the base material layer of the laminate by laser processing, a straight and beautiful opening can be obtained.

  As in the second aspect of the invention, when the band-shaped shape holding member is welded to the sealant layers on both the front and back surfaces immediately below the vicinity of the scheduled opening line, the opening holding function is exhibited to the maximum.

  As in the invention according to claim 3, when the two shape holding members welded to the sealant layer surfaces on both the front and back surfaces near the scheduled opening line are welded at shifted positions so as not to abut, In the state of the unfilled packaging bag, the portion of the shape holding member that is extremely thick is alleviated. Further, heat sealing of the left and right side seal portions is facilitated.

  As in the invention according to claim 4, when the width of the upper portion of the laminate constituting the front and back surfaces is wider than the bottom portion, the opening portion is wider than the bottom portion. In the case of usage, it can be more preferably used.

  When the shape retaining member includes a high-density polyethylene resin strip stretched in the longitudinal direction as in the invention according to claim 5, welding to the polyolefin-based sealant layer is easy, which is advantageous in productivity. It is.

FIG. 1 is an explanatory plan view schematically showing one embodiment of a pouch with an opening holding member according to the present invention. FIG. 2 is an explanatory cross-sectional view schematically showing an AA ′ cross section of FIG. 1. FIG. 3 is a perspective view showing a state in which the pouch with the opening holding member shown in FIG. 1 is opened and the opening is opened. FIG. 4 is a cross-sectional explanatory view schematically showing an example of a cross section in a second embodiment of the pouch with an opening holding member according to the present invention. FIG. 5 is an explanatory plan view schematically showing an example of a third embodiment of the pouch with an opening holding member according to the present invention. FIG. 6 is an explanatory cross-sectional view schematically showing a BB ′ cross section of FIG. 5. FIG. 7 is an explanatory plan view schematically showing an example of the fourth embodiment of the pouch with an opening holding member according to the present invention. FIG. 8 is an explanatory cross-sectional view schematically showing a laminated structure of an example of a laminate and a shape retaining member used for a pouch with an opening retaining member according to the present invention.

  Hereinafter, a pouch with an opening holding member according to the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory plan view schematically showing one embodiment of a pouch 1 with an opening holding member according to the present invention. FIG. 2 is an explanatory cross-sectional view schematically showing an AA ′ cross section of FIG. 1. FIG. 3 is a perspective view showing a state in which the pouch with the opening holding member shown in FIG. 1 is opened and the opening is opened. FIG. 8 is an explanatory cross-sectional view schematically showing a laminated structure of an example of a laminate and a shape retaining member used for the pouch with an opening retaining member according to the present invention.

  In the pouch 1 with an opening holding member according to the present invention, the sealant layers of the surface laminate 2a and the back laminate 2b having the base material layer 11 and the sealant layer 12 are opposed to each other. Is a standing pouch in which the bottom tape 3 bent into an inverted V-shape is inserted with the sealant layer of the laminate having the outside facing outward, and the peripheral edge portion is heat-sealed. A band-shaped shape holding member 8 is welded to either the front or back sealant layer immediately below the vicinity of the scheduled opening line 4, and the scheduled opening line 4 is formed by laser processing formed on the base material layer 11 of the laminate 10. A half-cut line.

  In FIG. 1, a scheduled opening line 4 indicates a scheduled opening position, and is a line obtained by subjecting the front and back laminates to half-cut by laser processing. The pouch 1 with the opening holding member can be opened in the horizontal direction, triggered by the opening start portions 4a, 4a applied to the side seal portions 5a, 5b. Therefore, the scheduled opening line 4 becomes the opening 4b after opening.

  Since the band-shaped shape holding member 8 is welded to one of the sealant layer surfaces near the scheduled opening line 4 in parallel with the scheduled opening line 4, the shape holding member 8 is located near the opening 4b after opening. 8 is welded.

The shape-retaining member 8 is a polymer material having a shape-retaining property such as aluminum or soft iron. For example, a super-stretched tape in which molecules of a high-density polyethylene (HDPE) resin are highly uniaxially oriented is known. . In the example shown in FIG. 8, a structure in which both surfaces of HDPE 16 are sandwiched between linear low-density polyethylene (LLDPE) resins 15 is used to facilitate welding to the sealant layer. The thickness of each layer is, for example, LLDPE 30 μm / HDPE 400 μm / LLDPE 30 μm.

  Since the shape holding member 8 is welded near the opening 4b, the opening 4b can be held in an open state as shown in FIG. Therefore, the contents can be easily taken out, and the hands are not stained.

  The pouch 1 with an opening holding member according to the present invention is a packaging bag generally called a standing pouch in shape. Normally, the contents are filled in a state where individual packaging bags are made, but the winding of the laminate can be continuously unwound with an automatic bag making and filling machine and can be filled simultaneously with bag making.

  In the pouch 1 with the opening holding member according to the present invention, since the shape holding member 8 is welded to the laminate 10 in a direction parallel to the top seal portion 7, the laminate 10 can be continuously supplied from winding. It is possible.

  The laminate 10 has at least a base material layer 11 and a sealant layer 12, but usually includes a pattern layer 13 formed by printing and an adhesive layer 14 for bonding the same, as shown in FIG. . The laminate 10 may be provided with an intermediate layer between the base material layer 11 and the sealant layer 12 or a gas barrier layer to be described later in order to impart thickness and stiffness.

  As the base material layer 11, a material having heat resistance to withstand tension during printing and drying with hot air, and withstanding heat during heat sealing is selected. Specifically, a stretched polyethylene terephthalate (PET) resin film, a stretched polypropylene (PP) resin film, a stretched nylon (ONy) film, or the like is used.

  As a material of the sealant layer 12, a polyolefin resin is generally used. Specifically, low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), linear low-density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer , An ethylene-based resin such as an ethylene-methacrylic acid resin copolymer, a blend resin of polyethylene and polybutene, a homopolypropylene resin (PP), a propylene-ethylene random copolymer, a propylene-ethylene block copolymer, a propylene- A polypropylene resin such as an α-olefin copolymer is used.

  The base layer 11 may be provided with a gas barrier layer that suppresses transmission of oxygen and water vapor. The gas barrier layer may be provided on the back surface of the base material layer 11 by evaporating aluminum or an inorganic oxide, or one gas barrier film may be separately added. By adding the gas barrier layer, the storage stability of the contents can be improved.

  The gas barrier layer may be a gas barrier film such as a polyvinylidene chloride film, a polyvinyl alcohol film, an ethylene vinyl alcohol copolymer film, a gas barrier nylon film, a gas barrier polyethylene terephthalate (PET) film, or a metal such as aluminum. A metal-deposited film or a PET film, an inorganic oxide-deposited film obtained by depositing an inorganic oxide such as aluminum oxide or silicon oxide, or a polyvinylidene chloride coating, a coating containing a water-soluble resin and an inorganic layered compound, A gas barrier coating layer such as a resin layer composed of a film obtained by reacting a metal alkoxide or a hydrolyzate thereof with an isocyanate compound, or a metal foil such as an aluminum foil can be used.

  The shape holding member 8 may be welded to the back surface laminate 2b as in the example shown in FIG. 2, or may be provided on the front surface laminate 2a (not shown). Further, as shown in FIG. 4, it may be provided on both the front and back laminates (second embodiment). At this time, as shown in FIGS. 5 and 6, if the two shape holding members 8a and 8b are welded to shifted positions so as not to come into contact with each other, the sealing of the side seal portion becomes easier. In addition, when they are stacked in a bag state, it is possible to avoid an extremely thick portion only at the shape holding member (third embodiment).

  FIG. 7 is an explanatory plan view schematically showing an example of the fourth embodiment of the pouch 1 with an opening holding member according to the present invention. In this embodiment, the laminated bodies 2a and 2b constituting the front and back surfaces are characterized in that the width of the upper part is wider than the bottom part. In such a pouch, since the opening 4b is wider, the ability to take out stored items is further improved.

  The results of verifying the superiority of the pouch with the opening holding member according to the present invention based on examples and comparative examples are shown below. A hamburger steak was sealed in each of the created pouches with an opening holding member, and evaluation was performed by five panelists. The evaluation was performed on a five-point scale of 5 (good) to 1 (bad).

<Example 1>
Using a 12 μm-thick PET film as the base layer, printing a pattern layer on the back side, dry-laminating with a 15 μm-thick ONy film as an intermediate layer, and dry-laminating an 80 μm-thick LLDPE film as a sealant layer This was used as a laminate on the front and back surfaces. The bottom tape had the same layer configuration as the laminated body on the front and back sides, and did not include the pattern printing layer. A shape retaining tape was welded to one side of a predetermined position near the opening of the surface laminate. The shape maintaining tape has a configuration of LLDPE 30 μm / HDPE 400 μm / LLDPE 30 μm. Using these laminates, a standing pouch having a shape as shown in FIG. 7 was prepared. The dimensions of the bag are 170 mm in width on the bottom surface, 190 mm in width on the top surface, and 120 mm in height. Using a carbon dioxide laser, a half-cut line penetrating the base material layer was formed on the front and back laminated body at the position where the opening was to be formed, and this was set as a scheduled opening line.

<Example 2>
A standing pouch was prepared in the same manner as in Example 1, except that a 12 μm-thick gas-barrier transparent vapor-deposited PET film having an inorganic oxide vapor-deposited on the back surface was used as the substrate layer.

<Comparative Example 1>
A standing pouch was prepared in the same manner as in Example 2, except that the half-cut line was not processed.

<Comparative Example 2>
A standing pouch was prepared in the same manner as in Example 2, except that the shape maintaining tape was not welded and half-cut processing was not performed.
Table 1 shows the evaluation results.

  From the results in Table 1, it can be seen that the pouch with the opening holding member according to the present invention is excellent in ease of use.

DESCRIPTION OF SYMBOLS 1 ... Pouch 2a with an opening holding member ... Surface laminated body 2b ... Backside laminated body 3 ... Bottom tape 4 ... Expected line 4a ... Opening start part 4b ... Opening 5a 5b side seal portion 6 bottom seal portion 7 top seal portion 8, 8a, 8b shape holding member 10 laminate 11 base material layer 12 Sealant layer 13 ... Pattern layer 14 ... Adhesive layer 15 ... LLDPE
16 HDPE

Claims (5)

  The sealant layers of the front and back laminates each having the base material layer and the sealant layer are opposed to each other, and the lower part of the laminate is bent in an inverted V-shape with the sealant layer of the laminate having the base material layer and the sealant layer facing outward. A standing pouch in which the bottom tape is inserted and the peripheral edge portion is heat-sealed, and has a scheduled opening line at the top of the front and back laminate, and a strip-shaped sealant layer on one of the front and back surfaces immediately below the vicinity of the scheduled opening line. A pouch with an opening holding member, characterized in that the shape holding member is welded, and the line to be opened is a half-cut line formed on the base material layer of the laminate by laser processing.   The sealant layers of the two-sided laminate having the base material layer and the sealant layer are opposed to each other, and the sealant layer of the laminate having the base material layer and the sealant layer is outwardly bent downward between the two to form an inverted V-shape. Is a standing pouch in which the bottom tape is inserted and the peripheral edge is heat-sealed, and has a scheduled opening line at the top of the front and back laminate, and a band-shaped sealant layer on both front and back surfaces immediately below the vicinity of the scheduled opening line. A pouch with an opening holding member, wherein the shape holding member is welded, and the scheduled opening line is a half-cut line formed by laser processing on the base material layer of the laminate.   3. The opening according to claim 2, wherein the two shape maintaining members welded to the sealant layer surfaces on the front and back surfaces in the vicinity of the scheduled opening line are welded to vertically shifted positions so as not to abut. Pouch with holding member.   The pouch with an opening holding member according to any one of claims 1 to 3, wherein a width of an upper portion of the laminate constituting the front and back surfaces is wider than a bottom portion.   The pouch with an opening holding member according to any one of claims 1 to 5, wherein the shape holding member includes a high-density polyethylene resin strip stretched in a longitudinal direction.

Images