JP2001240148A - Packaging bag with steam discharging hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safe and sure packaging bag with a steam discharging hole for a instant foodstuff such as curry to be taken only by heating wherein contents can be prevented from boiling over even if the bag is heated in a microwave oven. SOLUTION: The packaging bag is formed of a composite film including a sealant layer as an innermost layer wherein an inner face periphery of the film is sealed. An approximately circular strip seal 42 is formed on the sealant layer 10b face on an upper opening of the bag and outside the vicinity of a steam discharging hole 40 of the sealing layer 52 surface of a steam discharging hole sheet 50 which comprises at least two layers of an easy-to-peel sealing layer 54 as a surface and the sealing layer 52 as a rear face and also which is equipped with the steam discharging hole 40 bored. The packaging bag 1 with a steam discharging hole is folded at a center line 1 so that the easy-to-peel sealing layers 54 are in tight contact, and side rims and an upper rim are sealed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag for accommodating instant foods such as curries which are eaten only by heating, and more particularly to a steam vent having a steam vent for heating in a microwave oven. Related to packaging bags.

[0002]

2. Description of the Related Art Conventionally, there is known a synthetic resin packaging bag for storing instant foods, such as curries and porridges, which can be eaten only by warming. There is a method of putting it in or putting it in a microwave oven, and when heating with the latter microwave oven, there is a risk that the packaging bag will break from the seal etc. due to the internal pressure and the liquid contents will spill out, so the instant foods There is a method in which the packaging bag is once taken out into a deep dish or the like, wrapped, and then placed in a microwave oven.

[0003]

However, in the above-mentioned means for warming in a microwave oven in particular, there is a trouble such as preparation of a deep dish or the like and taking out the contents once.
There has been a demand for a packaging bag having a safe steam venting mechanism without blowing even if the entire packaging bag is heated in a microwave oven.

The present invention has been made to solve the demands of the prior art described above, and it is an object of the present invention to put a package such as a curry or the like into a microwave oven together with a synthetic resin packaging bag of an instant food that is eaten only by heating. It is an object of the present invention to provide a packaging bag with a steam vent that is free from spilling even when heated.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, the peripheral edges are sealed by the inner surfaces of two composite films whose innermost layers are made of a sealant layer. In the packaging bag, on the sealant layer surface of the upper opening, at least the front surface is formed of two layers of the easily peelable seal layer and the back surface of the seal layer, and the seal layer surface of the vapor vent sheet in which the vapor vent hole is provided. A substantially circular band is formed around the periphery of the vapor vent hole, or the entire outer surface of the band is sealed, and the easily peelable seal layers are bent vertically from the center so as to be in close contact with each other. Is sealed in the side edge and the upper edge so as to be wrapped in the composite film.

According to the first aspect of the present invention, when the packaging bag with the vapor vent hole filled with the contents is made to stand by some means and put into a microwave oven, the inside of the bag is swelled and bent by the internal pressure, so that it is easily bent. A vapor-perforated packaging bag with a mechanism in which the vapor-perforated sheet is peeled off from the easy-peelable seal layer of the vapor-perforated sheet that is adhered and sealed with the peel-off seal layer, and the vapor-perforated hole is exposed at the top of the bag, and the vapor escapes upward from the vapor-perforated hole As with conventional products, there is no need to once take out into a deep dish etc. and heat it in a microwave oven, and with a safe steam vent that does not spill even if you put it in a bag or put it in a microwave and warm it up To provide a packaging bag.

Further, in the invention according to claim 2, a notched portion is provided at a side edge of the bent steam vent hole sheet so as to form a packaging bag with a steam vent hole. It is. .

According to the second aspect of the present invention, since the sealants at the side edges seal the sealant layers of the composite film firmly at the notch, the storage bag is transported or the like during storage or transportation of the packaging bag with the vapor vent hole. It is possible to provide a packaging bag with a steam vent hole that is free from accidents such as exfoliation of the steam vent hole by exfoliation from the easily peelable seal layer of the folded steam vent sheet and leakage of the contents.

[0009]

Embodiments of the present invention will be described below. As shown in the perspective view of FIG. 1, the packaging bag with a spout of the present invention has, for example, both sides of a state where the inner surfaces of two front and back square composite films (10) each having an innermost layer made of a sealant layer are joined together. Edge seal part (12) and bottom seal part (14) of upper edge seal part (16) and bottom member (18)
And a packaging bag (a so-called standing pouch) formed with a vapor vent hole sheet (50) having a vapor vent hole (40) drilled in the upper opening thereof. 1).

[0010] The structure of the packaging bag (1) with a vapor vent hole will be described in more detail. As shown in the perspective view of the upper opening in FIG.
No. 0), the outermost layer is composed of the base film (10a), the innermost layer is composed of the sealant layer (10b), and the surface of the sealant layer (10b) in the upper opening is provided with the easily peelable seal layer (5).
In 4), the back surface is formed of a sealing layer (52),
The seal layer (52) of the steam vent hole sheet (50) in which the steam vent hole (0) is perforated is fitted, and a substantially circular band-shaped seal portion (4) is sealed around the outside of the steam vent hole (40).
2) is formed.

The seal between the sealant layer (10b) of the composite film (10) and the sealing layer (52) of the vapor vent sheet (50) in which the vapor vent holes (40) are formed is as follows.
The entire outer surface (not shown) of the substantially circular band-shaped seal portion (42)
It does not matter. Further, the position, shape and number of the vapor vent holes (40) are not limited. For example, as shown in FIG. 2, one may be provided at the center of the sheet (50), and although not shown, two or three may be provided. .

Next, as shown in the partial perspective view of FIG.
Above, the sealant layer (10b) of the composite film (10)
The steam-perforated sheet (50) sealed with the composite film (10) on the front and back is bent in the upper edge direction from the center line (1), and as shown in the partial perspective view of FIG. 54) The vapor-perforated sheet (50) folded and adhered to each other is wrapped by the two composite films (10) so that the side edges are sealed, and the side edge seal portion (12) and the upper edge are sealed. Is sealed to form an upper edge sealing portion (16) to form a packaging bag (1) with a steam vent.

When the packaging bag (1) having the above-described structure is used, for example, as shown in a partial cross-sectional view taken along the line BB of FIG. 1 shown in FIG. At the opening, a vapor vent hole (40) is perforated, and a steam vent hole sheet (50) folded in two is hung so as to be sandwiched between the front and back composite films (10). When 1) is placed in a microwave oven by itself and warmed, the internal pressure in the vapor-perforated packaging bag (1) increases as shown in a partial cross-sectional view taken along the line BB of FIG. 1 shown in FIG. Peel off on the easily peelable seal layer surface of the vapor vent sheet (50) (however, the upper edge is heat sealed and adhered)
When the steam vent sheet (50) swells and the internal pressure further increases, as shown in the partial side sectional view of FIG. 7, the easily peelable seal layer of the upper edge seal portion (16) which has been bonded by heat sealing is used. Peeled off, the steam vent (40) was exposed to the outside air,
Steam is ejected from the steam vent hole (40) toward the top part in a safe and secure manner.

The above-mentioned packaging bag with vapor vent (1) is used as a standing pouch having a bottom member (18) to form a self-standing packaging bag in a microwave oven.
As shown in the side sectional view of FIG. 1, a pouch of a non-self-supporting four-sided seal type is used. Even in the case of a non-self-supporting packaging bag, it is placed on a plastic holder (70) or the like and placed in a microwave oven so that it faces the top. Thus, it is possible to form a packaging bag with a steam vent hole from which steam is ejected safely and reliably.

According to the present invention, as shown in the perspective view of FIG. 1, a cutout (60) is provided on both sides of the steam vent hole sheet (50) which is folded in two, so that the front and back composite film is provided. The sealant layers of (10) are strongly adhered to each other by heat sealing.

The notch (60) will be described in more detail. For example, as shown in the perspective view of FIG. 2, one side of the steam vent sheet (50) is bent when it is bent from the center line (1). Two notches that penetrate through (60)
When the side edge seal portion (12) is formed on the side edge as shown in the partial perspective view of FIG. 4 and bent toward the upper edge side from the center line, the notch (60) portion of the front and back composite film ( The sealant layers (10b) of (10) are strongly bonded to each other by heat sealing. In this way, by strongly bonding the side edges, the steam-perforated sheet (5
This is a packaging bag with a vapor vent hole that is not peeled carelessly from the easily peelable seal layer (54) to expose the vapor vent hole and prevent the contents from leaking.

In addition, as shown in the perspective view of FIG. 3, for example, the notch (60) is formed on the entire side edge of the steam vent sheet (50), that is, the front and back composite film ( A portion corresponding to the side edge of 10) may be a notch (60), and such a notch (60)
By doing so, the adhesive force between the side edges of the sealant layer (10b) of the front and back composite film (10) becomes stronger.

As described above, when the notch is provided in the steam vent sheet (50) to increase the adhesive force of the side edge seal portion (12), as shown in the perspective view of FIG. Although the side edge of the steam venting sheet (50) remains in a state where it is not peeled off, it is peeled off in the easily peelable seal layer (54), so that the steam venting hole (40) can be sufficiently exposed.

Hereinafter, materials and the like forming the packaging bag (1) with a steam vent according to the present invention will be described. First, as the composite film (10) constituting the packaging bag body, the innermost sealant layer (10b) includes, for example, a linear low density polyethylene film (LLDPE), a low density polyethylene film (LDPE) having excellent heat sealability, Examples include a high-density polyethylene film (HDPE) or a non-oriented polypropylene film (CPP), which is appropriately selected from the size and use of the packaging bag, the sealing method, and the like.

The packaging bag (1) with a vapor vent of the present invention may be a single-layer film serving as such a sealant layer (10b). The outermost base film (10
In general, it has a multi-layer structure including a).

That is, as the base film (10a), for example, a stretched nylon film (ONy), a polyethylene terephthalate film (PET), or a polycarbonate film (PC) is used, and these base film (10a) and the sealant are used. Layer (10b)
In order to protect the contents, for example, an ethylene / vinyl alcohol copolymer resin film (EVOH) for the purpose of gas barrier properties, a ceramic vapor-deposited film on which silicon oxide or the like is vapor-deposited, or an aluminum foil is used as an adhesive. Depending on the purpose, a composite film (10) consisting of three layers or four layers can be used, such as a laminate laminated through an intermediary or the like or a laminate of stretched nylon films for the purpose of bending pinhole resistance.

The steam vent sheet (50) in which the steam vent holes (40) are formed is composed of at least two layers, an easily peelable seal layer (54) on the front surface and a seal layer (52) on the rear surface. As the easily peelable sealing layer (54) on the surface constituting the above, a film having a thickness of about 30 μm mainly composed of a polyethylene resin and added with various kinds of waxes such as silicone resin and polyethylene wax, and nitrified cotton is used. Specifically, for example, an easy peel sealant film such as a trade name VMX (manufactured by Wada Chemical Industry Co., Ltd.), a trade name CMPS (manufactured by Tocelo Co., Ltd.), and a trade name assist (manufactured by Sumika Plastics Co., Ltd.) can be used. It can be appropriately selected according to the strength and the like.

The sealing layer (52) on the back surface of the steam vent sheet (50) in which the steam vent (40) is formed.
For example, a film having excellent heat sealing properties such as a linear low-density polyethylene film (LLDPE), a low-density polyethylene film (LDPE), a high-density polyethylene film (HDPE) or an unstretched polypropylene film (CPP) having a thickness of about 100 μm is used. The steam vent sheet (5) which is used and is provided with a steam vent (40).
0) indicates that these films and the aforementioned easily peelable seal layer (5)
It is obtained by laminating the film forming 4) with an adhesive for dry lamination or the like.

Also, in consideration of protection of the contents, etc., a distance between the easily peelable seal layer (54) and the seal layer (52) is reduced.
A steam vent sheet (50) may be formed by laminating a stretched nylon film (0Ny) of about μm or the like.

The seal layer (52) of the vapor vent sheet (50) and the sealant layer (10b) of the above-mentioned packaging bag form a substantially circular strip-shaped seal portion (42) by ultrasonic sealing or the like. The side edge sealing part (1
2) By forming the upper edge seal portion (16) and the like, a packaging bag (1) with a steam vent hole can be obtained.

[0026]

As described above, the present invention has the following effects. That is, in a packaging bag which is sealed at the inner peripheral edge of two composite films whose innermost layers are made of a sealant layer, at least the inner surface of the upper opening has at least the surface as an easily peelable seal layer and the back surface as two layers of a seal layer. The steam-perforated sheet having the steam-perforated holes formed therein is folded inward to form a packaging bag with a vapor-perforated hole, which is wrapped in the two composite films. The steam-perforated sheet is peeled off from the easily peelable seal layer to expose the vapor-perforated hole, and steam is blown upward from the vapor-perforated hole. As described above, there is an effect that it is possible to eliminate such troubles as taking out to a deeper dish, wrapping it and putting it in a microwave oven.

Further, by providing a cutout penetrating the side edge of the above-described folded steam vent sheet, the sealant layers of the two composite films are firmly adhered to each other at the side edge. A vapor-perforated packaging bag with no accident that the vapor-perforated sheet is peeled off from the easily peelable seal layer during transportation or the like to expose the vapor-perforated hole can be obtained.

Accordingly, the present invention is a synthetic resin packaging bag for storing instant foods, such as curries and porridges, which are eaten only by warming, and in particular, it is possible to release steam safely and reliably by heating a microwave oven. As a packaging bag with steam vents,
It has excellent practical effects.

[Brief description of the drawings]

FIG. 1 is an overall perspective view for explaining an embodiment of a packaging bag with a steam vent according to the present invention.

FIG. 2 is a partial perspective view for explaining one embodiment of a process in the course of manufacturing the packaging bag with a steam vent according to the present invention.

FIG. 3 is a partial perspective view illustrating another embodiment of a process in the process of manufacturing a packaging bag with a steam vent according to the present invention.

FIG. 4 is a partial perspective view illustrating an embodiment of a packaging bag with a steam vent according to the present invention.

FIG. 5 is a partial cross-sectional view taken along the line BB of FIG. 1 for explaining one embodiment of the packaging bag with a steam vent according to the present invention.

FIG. 6 is a partial cross-sectional view taken along the line BB of FIG. 1 illustrating an example when an internal pressure is applied to the packaging bag with vapor vents of the present invention.

FIG. 7B illustrates one example when the internal pressure is further applied to the vapor-perforated packaging bag of the present invention to expose the vapor-perforated hole.
FIG. 4 is a partial cross-sectional view taken along the plane B.

FIG. 8 is an explanatory view showing another embodiment of the packaging bag with a steam vent according to the present invention in a side cross section in a form in which the packaging bag is self-standing.

FIG. 9 is a perspective view illustrating an example in which an internal pressure is further applied to the packaging bag with a steam vent according to the present invention to expose the steam vent.

[Explanation of symbols]

 1 packaging bag with vapor vent 10 composite film 10a base film 10b sealant layer 12 side seal 14 bottom seal 16 top seal 18 bottom member 40 {Steam release hole 42} Semicircular band-shaped seal portion 50} Steam release hole sheet 52} Seal layer 54} Easily peelable seal layer 60} Notch 70 | Holder l} Center line

Continued on front page F-term (reference) 3E064 AA01 AB25 BA17 BA26 BA27 BA28 BA30 BA36 BA60 BB03 BC18 EA30 FA05 HD06 HE02 HM01 HN05 3E067 AB01 BA12A BB12A BB14A BB15A BB16A BB18A BB25A CA04 CA48 EA06 EC25 GD06

Claims (2)

[Claims] Claims: 1. A packaging bag in which the periphery is sealed on the inner surface of two composite films whose innermost layers are made of a sealant layer,
On the sealant layer surface of the upper opening, at least the front surface is composed of two layers of an easily peelable seal layer and the back surface is a two-layer seal layer, and on the seal layer surface of the vapor vent hole sheet in which the vapor vent holes are formed, A substantially circular band is formed around the periphery, or the entire outer surface of the band is sealed, and the easily peelable seal layers are bent vertically from the center so that the easily peelable seal layers are in close contact with each other. A side bag and an upper edge are sealed so as to be wrapped in a packaging bag. 2. The packaging bag with a steam vent according to claim 1, wherein a cutout penetrating through the bent steam vent sheet is provided at a side edge of the folded sheet.