JP2019199259A - Standing pouch - Google Patents

Abstract

To provide a standing pouch in which an opening of the pouch is opened widely enough to easily take out stored contents without touching the neighborhood of the opening after heating in a microwave oven or the like.SOLUTION: A standing pouch is made up of a front film (2) and a rear film (3) with sealant faces facing with each other, and there are a top seal part (11), a left side seal part (12), a right side seal part (13) and a gusseted bottom seal part (14) with an intermediate film at a bottom part (4) around the front and rear films, and has a steam venting mechanism. A tape (6) with an opening-holding function is bonded in parallel with the top seal part.SELECTED DRAWING: Figure 1

Description

  The present invention is mainly used for a simple retort food that is cooked by a high-frequency cooking device or the like, and is a self-supporting standing pouch for heating. The opening is sufficiently widened to sequentially take out the contents after opening. This is related to a standing pouch that is open and is difficult for contents to adhere to the vicinity of the opening.

In a packaging bag that has a steaming function by heating, the packaging bag is pressurized to a high pressure due to the generation of internal water vapor, etc., and the internal air and water vapor must be discharged while maintaining the internal heat and pressure. There is. And since it may be heated at 100 degreeC or more, the shape maintenance tape using a normal polyethylene resin will deform | transform, and it cannot be set as the pouch which hold | maintains an opening shape using general polyethylene.
Also, when removing the heated contents from the packaging bag using a tool such as a spoon, chopsticks, or tweezers, if the opening is not sufficiently opened, the removed spoon or the contents or the contents will be removed from the packaging bag. It is easy to generate a problem that it contacts and becomes dirty.
Further, when the contents are poured out from the packaging bag and then discarded, there is a problem that the inside of the pouch is difficult to wash because the opening is easily closed even if it is to be washed.

For example, in Patent Document 1,
The bottom part that spreads in a flat shape is formed by inserting the bottom film in the folded state inside the bag part and heat-sealing it under the front film and back film where the side edges are welded in the superimposed state In a standing pouch
The bottom film is heat-sealed into a substantially ship bottom shape or a substantially inverted trapezoid shape in which the bottom surface portion is lowered toward the center from the left and right joint portions joined to the front film and the back film,
The bottom heat seal part which is a welding part of the said bottom film and the said surface film or a back film is proposed so that it may shape | mold along the periphery of the said bottom film.

  However, a standing pouch with a gusset on the bottom like this is easy to open because there is a bottom film on the bottom side, but on the top seal side, both ends are fused, so the front film and the back film However, it was difficult to remove the contents.

In Patent Document 2,
In a pouch container formed of a plastic material and having a pair of band-shaped fastener members having meshing portions that mesh with each other, attached to the inner surface of the mouth of the bag body,
A pouch container is proposed in which the fastener member or a mounting portion of the fastener member has a shape retaining property capable of plastic deformation.

The fastener member has shape retention and is attached to the inside of the top seal portion, so that the mouth portion can be easily fixed. However, since the male fastener member and the female fastener member were placed in the vicinity of the top seal portion before opening, the male fastener member and the female fastener member were opened when opening the vicinity of the top seal portion. The shape was almost flat.
Therefore, when opened, there was no gap between the front film and the back film, and the opening had to be forced out.
For this reason, in order to spread this opening part, the problem that a hand gets dirty occurred.
In particular, the general fastener described above was molded from polyethylene resin. However, since the fastener was exposed to steam at 100 ° C. applied during steaming, a fastener that thermally deformed could not be used.

JP 2006-96388 A JP 2003-40290 A

  Therefore, the present invention has an object of the present invention to obtain a standing pouch that can be easily taken out without contacting the vicinity of the opening by largely opening the opening of the pouch after passing through a microwave oven or the like.

The sealant layer of the front film and the rear film face each other, and has a top seal portion, a left seal portion, a right seal portion, and a bottom seal portion of a gusset having a bottom film at the bottom, and a steam release mechanism In a standing pouch with
A standing pouch characterized in that a tape having an opening holding function is welded in parallel to the top seal portion.

  The standing pouch of the present invention has a function of maintaining the shape with the opening being widened. For this reason, the contents can be taken out with a flatware such as a spoon without contaminating the contents and tableware.

It is a front view showing a standing pouch according to the present invention. In the standing pouch according to the present invention, it is a perspective view of the vicinity of the opening showing the opening process. It is a perspective view which shows the state which opened the standing pouch which concerns on this invention. It is a front view which shows the example of embodiment which enlarged the opening part with respect to the bottom part by the standing pouch which concerns on this invention. In the standing pouch which concerns on this invention, it is a perspective view which shows the state which opened the pouch in the embodiment which enlarged the opening part with respect to the bottom part. In the standing pouch according to the present invention, it is a front view showing an embodiment in which the opening is enlarged with respect to the bottom and the steam venting is different.

An embodiment of a standing pouch according to the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing a standing pouch 1 according to the present invention.
The standing pouch 1 is a bottom film in which the sealant surfaces of the front film 2 and the rear film 3 face each other, the top seal part 11, the left seal part 12, the right seal part 13, and the bottom part are folded with the sealant layer on the front side. 4 is composed of a bottom seal portion 14 having a gusset sandwiched between the front film 2 and the rear film 3.
Since this standing pouch is a pouch for processing by retort, the sealant layer of the front film and the rear film is formed of a sealant composed of an unstretched polypropylene resin layer.

A steam vent 15 is provided near the upper side of the left seal 12 or the right seal 13. In FIG. 1, the steam release portion 15 is provided above the opening start point of the right seal portion 13.
The steam release unit 15 does not rupture when the pouch is heated at a high frequency by a microwave oven or the like, and as the inside of the pouch becomes high temperature, the moisture in the contents becomes water vapor and the pressure inside the pouch rises. Thus, it peels so as to maintain a constant internal pressure, and fulfills the function of a valve for releasing the generated steam.

The left seal portion 12 has a left easy-open start point 51, and the right seal portion 13 has a right easy-open start point 52.
Between the left easy-opening start point 51 and the right easy-opening start point 52, it can also be formed by a fragile line that is easily broken.
For example, the laser beam may be scanned, or half cutting may be performed with a big blade or a rotary blade. Moreover, you may form by making the front film and the back film into the lamination sheet containing the uniaxially stretched film which improved tearability.
In the case of half-cutting, a cut is formed in a base material such as a biaxially stretched film, but at least the sealant layer is processed so as not to have a blade.

A feature of the standing pouch 1 of the present invention is that a tape 6 having an opening holding function is welded.
The tape 6 having the opening holding function is welded to at least one of the sealant surfaces of the front film 2 or the rear film 3 in parallel to the top seal portion 11.

  The tape 6 having an opening holding function is a tape that can hold the standing pouch in an opened state.

FIG. 2 is a perspective view of the vicinity of the opening showing the opening process in the standing pouch according to the present invention.
The steam release portion 15 provided in the right seal portion 13 causes the inner fusion portion to partially peel due to the increase in internal pressure, and the water vapor 151 inside the pouch escapes from the slightly separated gap, and the water vapor 151 is removed. Pouch 1
In this step, high-pressure steam inside the pouch is removed, and after the steam 151 is removed, the left opening start point 51 provided on the left seal part 12 and the right opening start point 52 provided on the right seal part 13 are the starting points. Shows the tearing process.
The opening start point is provided below the top seal portion and is formed in a V-shaped notch shape in the figure, but it may be a simple linear cut or formed by pores. It doesn't matter.

The tape 6 having an opening holding function is constituted by a tape having at least a high-density polyethylene resin layer.
In terms of material, in the case of a tape composed of a single high-density polyethylene resin layer, there is a risk of peeling or plastic deformation due to retort heating, so a polypropylene resin layer is added to the high-density polyethylene resin layer to create a multilayered co-polymer. Use extruded sheets.
For example, a shape-retaining sheet in which a high-density polyethylene resin layer is sanded from the front and back by a co-extruded sheet of CoPP layer / PP layer / special PO layer from the outside may be used.
In particular, the high density polyethylene resin layer therein may be composed of a uniaxially stretched super stretched film.
The tape 6 having an opening holding function can be formed into a narrow tape shape, and can be welded to the pouch by fusing and slitting the end face side.

FIG. 3 is a perspective view of the standing pouch 1 in an unsealed state.
By tearing and separating the vicinity of the top seal portion 11, the standing pouch 1 can be kept open by holding the tape 6 having an opening holding function parallel to the opening inside the opened opening. Can be held.

FIG. 4 is a front view showing an embodiment in which the opening is made larger than the bottom 4 in the standing pouch 1 according to the present invention.
You may enlarge an opening part by applying a taper to a side seal part like a figure.
Also at this time, the tape 6 having an opening holding function is provided on the inner side in parallel with the top seal portion.

FIG. 5 is a perspective view showing the standing pouch 1 according to the present invention in a state where the pouch is opened in the embodiment in which the opening is made larger than the bottom 4.
Since the tape 6 having the opening holding function reliably holds the opening and can be opened largely in proportion to the diameter, when removing with a flatware such as a spoon toward the bottom, take out the contents without staining. Can do.
Such a function makes it possible to substitute the standing pouch 1 as tableware, like a bowl or bowl, and add seasonings or sprinkle with seaweed, sesame seeds, or hot peppers as you like. Is possible.

FIG. 6 is a standing pouch 1 according to the present invention. In the embodiment in which the opening is enlarged with respect to the bottom 4, a steam vent is provided, and a film fusion part is provided in the width direction of the front surface. It is a front view of a different example embodiment.
In this embodiment, a fold seal portion or a palm seal portion is formed in either the front film 2 or the rear film 3, and the weak seal portion is weaker than the seal at the periphery of the pouch in terms of the seal strength of the overlapped seal portion. 16.
For this reason, when heated and the internal pressure rises, the weak seal 16 is preferentially peeled off, and the internal pressure is maintained at a constant pressure. The weak seal part is not peeled at the full width at once, but is partially peeled to make it easier to maintain the internal pressure. As shown in FIG. 6, the seal width is narrowed only at the center or weaker than a certain width. It is better to make it adjustable by making it stronger.

  The basic structure of the laminated film constituting the standing pouch of the present invention may be a film comprising a base material layer on the outside and a sealant layer on the inside, but as an intermediate layer, a barrier layer that improves the storage stability of the contents In addition, it is preferable to provide a layer that gives flexibility such that the bag is not easily broken when dropped.

  Examples of the base material layer include a polyethylene terephthalate film, a polypropylene film, a polystyrene film, a nylon film, a polycarbonate film, a polyacrylonitrile film, and a polyimide film. There is no particular limitation as long as it has mechanical strength and dimensional stability. A biaxially stretched film is particularly preferable. Moreover, what provided the aluminum vapor deposition layer in these films may be used.

  Moreover, a printing layer can be suitably provided in a base material layer as needed. The printed layer is a layer printed with an ink obtained by adding various pigments, extender pigments, plasticizers, drying agents, stabilizers and the like to a binder resin such as urethane, acrylic, nitrocellulose, or rubber. As the printing method, for example, known printing methods such as offset printing, gravure printing, flexographic printing, silk screen printing, and ink jet printing can be used. Moreover, the adhesiveness of a printing layer can be improved by performing the corona treatment or the ozone treatment on the surface of a base material layer as a pretreatment beforehand.

As the sealant layer, a polyolefin resin having high heat resistance such as polypropylene and ethylene / propylene copolymer can be used. These resins can be formed into a film by an extruder such as a T-die or inflation. It may be a single layer or multiple layers. The thickness of the film is preferably in the range of 50 to 200 μm.

  As the adhesive layer, an adhesive for dry lamination can be used. For example, a two-component curable urethane adhesive, a polyester urethane adhesive, a polyether urethane adhesive, an acrylic adhesive, a polyester adhesive, a polyamide adhesive, an epoxy adhesive, and the like can be used. . As a bonding method, a dry laminating method can be used, but it may be bonded while forming a film on the sealant layer side by an extruder lamination machine, or may be processed by sand polyethylene.

  Also, if it is necessary to improve the physical properties of the laminated sheet, for example, when improving the rigidity, drop strength, puncture strength, etc. of the laminated sheet, when improving the barrier properties such as water vapor or oxygen gas, etc. It is also possible to provide a layer.

  As an intermediate | middle layer, aluminum foil, an aluminum vapor deposition polyester film, an inorganic oxide vapor deposition polyester film, a polyamide film etc. can be used, for example. Moreover, in order to laminate | stack an intermediate | middle layer, it can bond together by the dry lamination method through an contact bonding layer.

  As the inorganic oxide, metal oxides such as silicon oxide, aluminum oxide, magnesium oxide, calcium oxide, potassium oxide, tin oxide, sodium oxide, boron oxide, titanium oxide, lead oxide, zirconium oxide, and yttrium oxide can be used. . Of these, silicon oxide, aluminum oxide, magnesium oxide and the like are preferable from the viewpoint of productivity and price.

  The intermediate film may have the same configuration as the front film and the rear film. However, for ease of use and productivity, it is preferable to use a biaxially stretched film such as polyethylene terephthalate, polyamide, or polypropylene for the surface to be folded. And it is good to make it thinner than a front film and a back film, and to make opening / closing property smooth.

<Example 1>
As the front film and rear film, a laminated film consisting of polyethylene terephthalate film (12 μm) / printing layer / adhesive layer / nylon film (25 μm) / adhesive layer / heat-resistant unstretched polypropylene film (60 μm) having a transparent vapor deposition layer from the outside is used. did.
A laminated film consisting of polyethylene terephthalate film (12 μm) / adhesive layer / nylon film (15 μm) / adhesive layer / heat-resistant unstretched polypropylene film (40 μm) is used as the bottom film, and the heat-resistant unstretched polypropylene film side is on the outside. The gusset was fused between the front film and the rear film.
As a shape-retaining tape, a 10 mm wide tape having a configuration of multilayer co-pressed polypropylene film (30 μm) / high-density polyethylene sheet (200 μm) / multi-layer co-pressed polypropylene film (30 μm) was used.
The container has a width of 160 mm and a height of 158 mm. A steam vent is provided on the inner side of the left side at a position 15 mm below, and a shape holding tape is welded to the inner surface. It was a standing pouch.

<Example 2>
The front film was divided into a front upper film and a front lower film, and the front films connected to each other via a weak seal portion were used to create a standing pouch composed of the rear film and the intermediate film. (Created according to Fig. 6)
In other respects, a standing pouch was prepared according to Example 1.

<Comparative Example 1>
A standing pouch was prepared in the same manner as in Example 1 except that no steam vent was provided.

<Comparative Example 2>
A standing pouch was prepared in the same manner as in Example 1 without using a shape-retaining tape.

<Comparative Example 3>
A standing pouch was prepared in the same manner as in Example 1 except that no shape-retaining tape was used and no steam vent was provided.

<Evaluation method>
As the contents to be put in the standing pouch, it was packed with 100 g of hamburger with demiglace sauce.
After heating for 3 minutes in a 500 W microwave oven, the standing pouch was opened from one opening start point, and the opening property, steaming property (cooking property), and the ability to take out the contents with dishes such as forks and spoons were evaluated.

<Openness evaluation method>
After grasping the top seal portion above the opening start point, tearing it along the opening breaking line and opening it, the opening portion was held open, and it was evaluated whether the opening could be held in a wide open state.

<Method of evaluating vapor permeability (cooking ability)>
After removing the contents, the ease of disposal of the standing pouch was evaluated.

<Evaluation method for taking out by tableware>
When the contents were taken out with a fork or spoon, it was evaluated whether the contents could be taken out without contacting the contents at the tip of the opening.

<Evaluation results>
In Example 1 and Example 2, it was a favorable result about the opening property, steaming property, and the taking-out property of the content by tableware.
In Comparative Example 1, there was a problem that the pouch swelled during cooking, and the contents erupted with demiglace sauce from the bottom. After opening, the open state was maintained, and the contents could be taken out without any problem.
In Comparative Example 2, after opening, the state in which the opening was opened could not be maintained and closed again. For this reason, the take-out performance with the tableware is remarkably poor, and when the contents are taken out, the contents and the tableware adhere to the surroundings, and the surroundings as well as the openings are soiled.
In Comparative Example 3, there was a problem that the pouch ruptured during cooking and the contents were scattered. Even after opening after cooking, the opening did not spread widely, making it difficult to take out the contents, and the opening and the surroundings were soiled.

  From the above results, the standing pouch that has a steam vent and the front film and the rear film are welded at least with a tape having an opening holding function is evaluated as having good opening, steaming, and tableware removal. It was done.

  The standing pouch according to the present invention is as described above, and is self-supporting and can maintain a state in which the opening is wide open, so that the contents, the pouch opening, and the surroundings of the pouch are not contaminated. Can be taken out, and can also be used as a bowl. Furthermore, since it can be produced simply by welding a tape having an opening holding function parallel to the top seal to the inner surface or outer surface of the pouch, the merit of the present invention is great, such as high productivity and low cost supply.

1 ... Standing pouch 11 ... Top seal 12 ... Left seal 13 ... Right seal 14 ... ..Bottom seal 15 ... Vapor vent 151 ... Water vapor 16 ... Weak seal 2 ... Front film 3 ...・ ・ ・ ・ ・ Back film 4 ・ ・ ・ Intermediate film 51 ・ ・ ・ ・ ・ ・ Left opening start point 52 ・ ・ ・ ・ ・ ・ Right opening start point 6 ・ ・ ・ ・ ・ ・・ Tape with opening retention function

Claims (5)

The sealant layer of the front film and the rear film face each other, and has a top seal portion, a left seal portion, a right seal portion, and a bottom seal portion of a gusset having a bottom film at the bottom, and a steam release mechanism In a standing pouch with
A standing pouch, wherein a tape having an opening holding function is welded in parallel to the top seal portion.   The standing pouch according to claim 1, wherein the sealant layers of the front film and the rear film are made of an unstretched polypropylene resin layer.   The standing pouch according to claim 1 or 2, wherein the tape having an opening holding function is formed of a laminate including a high-density polyethylene resin layer.   The tape having the opening holding function is a laminated film including a high density polyethylene resin film, and from the outside, an unstretched polypropylene resin layer / polypropylene resin layer / special polyolefin resin layer / high density polyethylene resin layer / special polyolefin resin layer The standing pouch according to claim 3, wherein the standing pouch comprises a coextruded film comprising a linear low density polyethylene resin layer of / polypropylene resin layer / unstretched polypropylene resin layer.   The standing pouch according to claim 3 or 4, wherein the high-density polyethylene resin layer constituting the tape having an opening holding function is composed of a uniaxially stretched super-stretched film.

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