CN115504086B

CN115504086B - Packaging bag (GY)

Info

Publication number: CN115504086B
Application number: CN202210757559.3A
Authority: CN
Inventors: 原正人; 槌谷尚
Original assignee: Kyoraku Co Ltd; Nafuko Co Ltd
Current assignee: Kyoraku Co Ltd; Nafuko Co Ltd
Priority date: 2011-12-28
Filing date: 2012-12-27
Publication date: 2023-10-13
Anticipated expiration: 2032-12-27
Also published as: CN103998350A; CN110834822B; KR101892377B1; WO2013100058A1; PH12014501291A1; CN110834822A; SG11201403141RA; KR20140091050A; KR101680439B1; CN109229938B; CN115504086A; SG10201510657QA; PH12018501421A1; KR20160135857A; JP2013151317A; JP6026747B2; MY183399A; SG10202109167QA; PH12014501291B1; KR20180093125A

Abstract

The present application provides a packaging bag with improved steam discharge. The packaging bag has a sealing part formed by sealing films, the sealing part is peeled off by vapor pressure generated in the packaging bag to discharge the vapor to the outside, and the packaging bag comprises: the packaging bag includes a vapor-discharging seal portion formed by bending and projecting a part of the seal portion in an inward direction, a substantially V-shaped unsealed portion formed outside the vapor-discharging seal portion, the unsealed portion having a communication portion in which a gap between unsealed films communicates with the outside, the vapor-discharging seal portion and the unsealed portion being located at a closing portion formed by bending and overlapping the films with each other, the packaging bag having at least a 1 st vapor-discharging portion and a 2 nd vapor-discharging portion, the 1 st vapor-discharging portion being formed by the unsealed portion and a region where the vapor-discharging seal portion peels off and opens when the packaging bag is inflated, and the 2 nd vapor-discharging portion being formed by a slit or a notch formed in the unsealed portion.

Description

Packaging bag (GY)

The present application is a divisional application of international application number PCT/JP2012/083891 (national application number 201280061988.1), a divisional application of the application named "package bag" (application number 201811083094.8, application name "package bag") (application number 201911061625.8, application name "package bag") (date of entering chinese national stage: 2014, date 06, 13).

Technical Field

The present invention relates to one such package: when a package bag filled with a content such as a retort food made of a liquid, a solid, or a mixture thereof is heated by a microwave oven or the like, the package bag is opened by vapor pressure, and vapor generated inside the package bag can be discharged to the outside.

Background

When a package bag filled with contents such as retort foods is heated by a microwave oven or the like, the pressure inside the package bag increases due to the heating of the package bag by a gas such as Rong Wuchan steam from inside, and the package bag may be broken to scatter the contents.

Accordingly, there are packages having a structure for avoiding an increase in pressure inside the package (for example, refer to patent document 1, japanese patent laid-open publication No. 2002-80072, patent document 2, japanese patent laid-open publication No. 2005-82172, patent document 3, japanese patent laid-open publication No. 2003-182779, patent document 4, japanese patent laid-open publication No. 2005-320023, patent document 5, japanese patent laid-open publication No. 3665795).

In patent document 1, a heat seal (vapor-releasing seal) having a curved shape for concentrating stress when pressure is raised during heating cooking by a microwave oven is provided, and the vapor-releasing seal is peeled off first to release the vapor from the heat seal to the outside, thereby preventing the package bag from being broken. The vapor discharge seal portion is a portion that seals a region between a curved shape on the inside of the package, that is, the inside curved shape, and a curved shape on the outside of the package, that is, the outside curved shape, and is a portion that protrudes in a curved shape toward the inside of the package.

In the package bag of patent document 1, the vapor-releasing seal is peeled off first, and the vapor is discharged to the outside, so that the package bag can be prevented from being broken. However, since the package bag disclosed in patent document 1 is not provided with a member for notifying that the package bag has been opened, it is necessary to confirm that the package bag has been opened by visual inspection. Therefore, for example, when the contents in the package bag are being cooked by heating in a microwave oven, if the contents are left from the microwave oven or are left to be left without being opened, the contents are excessively heated after the package bag is opened, and the moisture is lost, so that the taste of the food is lowered. Further, there are also contents which can improve the taste of food by heating for a certain time after the opening of the packaging bag according to the kind of the contents, but if the packaging bag is not seen to have been opened, a proper stewing time cannot be grasped.

Therefore, there are packages in which the opening of the package can be notified by sound.

In patent document 2, the unsealed portion includes an air bag and a vibrating reed obtained by cutting or the like the unsealed portion itself, and the vapor stored in the air bag vibrates the vibrating reed to generate a sound. Thus, in patent document 2, the packaging material itself constituting the packaging bag is processed, whereby the opening of the packaging bag can be notified by sound.

In patent document 3, a notch or a slit is provided in a sealing portion surrounding the periphery as a vapor permeable portion, and vapor is emitted to the outside by the sealing portion being lowered in sealing and the vapor permeable portion.

In addition, patent documents 1 and 4 described above are provided with a substantially V-shaped heat seal (vapor-release seal portion) for concentrating stress when the pressure is raised during heating cooking by a microwave oven, and vapor is released from the vapor-release seal portion by peeling off the vapor-release seal portion.

The microwave package bag disclosed in patent document 5 is a vertically-placed microwave package bag having a generally triangular cross section in which a fitment is provided at the bottom of the package bag so that the bottom can be raised, in consideration of convenience for users such as filling the contents and displaying the commodities.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2002-80072

Patent document 2: japanese patent laid-open publication No. 2005-82172

Patent document 3: japanese patent laid-open publication No. 2003-182779

Patent document 4: japanese patent laid-open No. 2005-320023

Patent document 5: japanese patent No. 3665795

Disclosure of Invention

Problems to be solved by the invention

The above-described packaging bag having a vapor-exhausting structure is widely used for convenience, and thus further improvement is strongly desired.

Accordingly, an object of the present invention is to provide a packaging bag improved in terms of vapor discharge.

Solution for solving the problem

In order to achieve the object, the present invention has the following features.

The packaging bag of the present invention is characterized in that the packaging bag has a vapor-release seal portion formed by bending and projecting a part of the seal portion to which the film is attached in the inside direction of the packaging bag, wherein at least a part of the vapor-release seal portion has a peel strength weaker than that of a part other than the part of the vapor-release seal portion, and when peeling occurs by a vapor pressure, the part other than the part of the vapor-release seal portion remains to form an edge portion, and a sound is emitted with the vapor release.

ADVANTAGEOUS EFFECTS OF INVENTION

The present invention can provide a packaging bag improved in terms of vapor discharge.

Drawings

Fig. 1 is a diagram showing an example of the structure of a package bag 100 according to embodiment 1, (a) is a perspective view of the package bag 100 before the opening 4 is sealed, and (b) is a perspective view of the package bag 100 sealed by heat-sealing the opening 4 with the contents D contained in the package bag 100.

Fig. 2 is a diagram showing a configuration example of the vapor-discharge sealed portion 7 and unsealed portions 9 (9 a, 9 b).

Fig. 3 is a diagram for explaining the function of the package bag 100 according to the present embodiment, (a) is a side view of the package bag 100 in a state where the package bag 100 (b) of fig. 1 is heated and inflated by a microwave oven, (b) is a diagram showing a state where the distal end 70 of the vapor discharge seal portion 7 is opened to form a vapor discharge portion at the time of high-pressure inflation, and (c) is a perspective view of the package bag 100 in a state where the package bag 100 is heated and inflated by a microwave oven.

Fig. 4 is a diagram for explaining an example of sound generated when the vapor discharge portion is formed.

Fig. 5 is a view for explaining the vapor discharge portion.

Fig. 6 is a diagram showing a structural example of the package bag 100 according to the present embodiment.

Fig. 7 is a diagram showing a structural example of the package bag 100 according to the present embodiment.

Fig. 8 is a diagram for explaining an example of sound emission in the configuration example shown in fig. 7 (c).

Fig. 9 is a diagram showing a structural example of the package bags of examples 1 to 5, and shows a structural example of the vapor-releasing seal portion before and after peeling.

Fig. 10 is a diagram showing a structural example of the package bags of comparative examples 1 to 2, and a diagram showing a structural example of the vapor-discharge sealing portion before and after peeling.

Fig. 11 is a diagram showing a configuration example of the package bag 200 according to embodiment 2 and the package bag 300 according to embodiment 3, (a) is a perspective view of the package bag 200 (300) before the opening 4 is sealed, and (b) is a perspective view of the package bag 200 (300) in which the contents D are accommodated in the package bag 200 (300) and the opening 4 is heat-sealed.

Fig. 12 is a diagram showing a configuration example of the vapor-discharge sealed portion 7 and the unsealed portion 9 (polygonal unsealed portion 9a, band-shaped unsealed portion 9 b).

Fig. 13 is a diagram for explaining the function of the packaging bag 200 according to the present embodiment, (a) is a side view of the packaging bag 200 in a state in which the packaging bag 200 of fig. 11 (b) is heated and inflated by a microwave oven, and (b) is a diagram showing a state in which the distal end 70 of the vapor discharge seal portion 7 is opened to form the 1 st vapor discharge portion 101 at the time of high-pressure inflation.

Fig. 14 is a diagram showing an example of the structure of the film joining section 6 according to embodiment 3.

Fig. 15 is a diagram showing a layer structure example of each of the portions 7, 8a, 8b constituting the film joining portion 6 shown in fig. 14, (a) showing a layer structure example of the 2 nd sealing portion 8b shown in fig. 14, (b) showing a layer structure example of the 1 st sealing portion 8a shown in fig. 14, and (c) showing a layer structure example of the vapor-exhausting sealing portion 7 shown in fig. 14.

Fig. 16 is a diagram showing a structural example of the package 300 according to the present embodiment.

Fig. 17 is a perspective view of the container according to embodiment 4.

Fig. 18 is an expanded view of the container according to the embodiment.

Fig. 19 is a top view of the container of the present embodiment.

Fig. 20 is a perspective view of the package bag according to the present embodiment.

Fig. 21 is a view showing the container and the packaging bag of the present embodiment as one body.

Fig. 22 is a view showing a state where the container and the packaging bag are heated by the microwave oven and inflated.

Fig. 23 is a view showing a folding container according to the present embodiment.

Fig. 24 is an expanded view showing the folding container according to the present embodiment.

Fig. 25 is a perspective view showing the container and the package bag laid flat.

Fig. 26 is a front view showing a container and a packaging bag vertically placed.

Detailed Description

Embodiment 1

This embodiment relates to an improvement of a package bag that emits a sound when vapor is discharged.

Patent document 2 described above, which is exemplified by the prior art, has a structure as follows: the peripheral edge portion of the vibration piece is cut by punching or the like, the vibration piece is strongly vibrated by the vapor, and the vapor is discharged from the peripheral edge portion of the vibration piece to the outside, which requires processing of the unsealed portion itself.

Therefore, in the package bag of patent document 2, it is necessary to heat-seal a package material constituting the package bag to form an unsealed portion, and then to die-cut the unsealed portion to form a vibrating piece, or to die-cut the unsealed portion of the package material in advance to form a vibrating piece, and it is necessary to perform a process other than the heat-seal process of the package material in order to construct a mechanism for emitting sound.

The present embodiment has been made in view of the above circumstances, and an object thereof is to provide a packaging bag capable of producing sound only by the shape of a seal portion formed by sealing a film.

Summary of the package 100 according to the present embodiment

First, an outline of the package 100 according to the present embodiment will be described with reference to fig. 1 to 4.

As shown in fig. 1, the package bag 100 of the present embodiment includes sealing portions 3, 5, 10, 8a, 8b formed by sealing between the peripheral edge portions of the films constituting the upper surface portions 2 (2 a, 2 b) and the peripheral edge portions of the films constituting the lower surface portion 1.

The package 100 of the present embodiment includes: a vapor discharge seal portion 7 formed by bending and projecting a substantially central portion of the seal portion 8a in a substantially V-shape toward the inside of the package bag 100; and unsealed portions 9 (9 a, 9 b) formed on the outside of the vapor-evacuation seal portion 7 so as to be adjacent to the vapor-evacuation seal portion 7, wherein when the internal pressure of the packaging bag 100 increases to expand the packaging bag 100, the vapor-evacuation seal portion 7 is peeled off and opened, and a vapor evacuation portion for evacuating vapor in the packaging bag 100 is formed by the area of the opening and the unsealed portions 9 (9 a, 9 b).

The vapor discharge seal portion 7 of the present embodiment is formed of a seal shape in which the self-sealing portion 8a protrudes inward when the seal portion is substantially V-shaped, and is formed of a portion in the inward direction of the package bag 100 than a line connecting two points, that is, the start points 71 and 71, at which the seal portion starts to be bent. The vapor discharge seal portion 7 of the present embodiment is characterized in that the seal width of the tip portion is different from the seal width of the other portion at least between the two points of the start points 71 and 71 at which the curved shape starts, and the tip 70 side of the vapor discharge seal portion 7 is narrow, and when the package bag 100 is inflated and the vapor discharge seal portion 7 is peeled off as shown in fig. 3 (b), the other portion remains, and the remaining portion forms the edge portion 7a protruding inward from the seal portion 8 a.

Since the package bag 100 of the present embodiment is formed with the edge portion 7a protruding from the seal portion 8a in the inward direction, when gas such as water vapor in the package bag 100 is discharged from the vapor discharge portion to the outside of the package bag 100, a part of the gas collides with the edge portion 7 a. The gas collides with the edge portion 7a, and the flow of the gas changes to form a vortex, thereby emitting sound. As a result, only the shape of the vapor discharge sealing portion 7 formed by sealing the film can emit sound. The package 100 according to the present embodiment is described in detail below with reference to the drawings.

(example 1 of embodiment 1)

< structural example of packaging bag 100 >)

First, a structural example of the package bag 100 according to the present embodiment will be described with reference to fig. 1 to 3. Fig. 1 is a diagram showing a configuration example of a package bag 100 according to the present embodiment, and fig. 1 (a) is a perspective view of the package bag 100 before closing the opening 4, and fig. 1 (b) is a perspective view of the package bag 100 in which the contents D are accommodated in the package bag 100 and the opening 4 is heat-sealed. Fig. 2 is a diagram showing a configuration example of the vapor-discharge sealing portion 7 and the unsealed portion 9 (9 a, 9 b) provided in the film-closing portion 6 shown in fig. 1. Fig. 3 shows an example of the structure of the package 100 in a state where the package 100 shown in fig. 1 (b) is heated and inflated by a microwave oven, fig. 3 (a) is a side view of the package 100, fig. 3 (b) is a view showing a state where the tip end 70 of the vapor-discharge seal portion 7 is opened to form a vapor discharge portion, and fig. 3 (c) is a perspective view of the package 100.

As shown in fig. 1, the package bag 100 according to the present embodiment includes: a lower surface portion 1; an opening-side upper surface portion 2a overlapping with the opening 4 side of the lower surface portion 1; and a depth side upper surface portion 2b overlapping with the depth side of the lower surface portion 1. In the package 100 of the present embodiment, the upper surface 2 is constituted by the opening side upper surface 2a and the depth side upper surface 2 b.

As the films constituting the lower surface portion 1, the opening side upper surface portion 2a, and the depth side upper surface portion 2b, any films can be used as long as they can be welded to each other after heat sealing, and for example, plastic films having heat sealing properties used in a usual packaging bag can be used. Examples of the material for constituting the plastic film include a single-layer film made of a thermoplastic resin having heat sealability, sheets, and a multilayer film made of a laminate of a thermoplastic resin having heat sealability and another thermoplastic resin.

Examples of the material having good heat sealability include known low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, olefin resin modified by grafting with an ethylenically unsaturated carboxylic acid or anhydride thereof, polyamide resin and/or copolyamide resin having a relatively low melting point and/or a relatively low softening point, polyester resin and/or copolyester resin, and polycarbonate resin.

In addition, various barrier films can be used for other plastic materials for lamination. Among them, when a laminate film formed by laminating another plastic material and the thermoplastic resin is used, it is preferable that the heat sealing is performed such that thermoplastic resin layers having good heat sealing properties such as resins having low melting points are inner surfaces of each other.

In the package bag 100 of the present embodiment, the side seal portion 3 is partially formed by heat-sealing between the side edges of the lower surface portion 1 and the side edges of the opening-side upper surface portion 2 a. The three side edges of the lower surface portion 1 and the three side edges of the depth side upper surface portion 2b are heat sealed together to form a part of the side seal portion 3 and the tip seal portion 5. The opening side upper surface portion 2a and the depth side upper surface portion 2b are folded back, overlapped, and heat-sealed to form the film-closing portion 6.

The film closing portion 6 has a steam discharge seal portion 7 protruding in a substantially V-shape curved toward the inside of the package bag 100 at the central portion in the longitudinal direction thereof, and strip-shaped end seal portions 8a, 8a along the edges in the longitudinal direction of the film closing portion 6 at both sides of the steam discharge seal portion 7. And, there are band-shaped side seal portions 8b, 8b along the edges in the width direction of the film-closing portion 6. The vapor discharge seal 7, the band-shaped end seal 8a, and the band-shaped side seal 8b are portions that overlap and heat-seal the opening side upper surface portion 2a and the depth side upper surface portion 2b, and the vapor discharge seal 7, the band-shaped end seal 8a, and the band-shaped side seal 8b are connected together. In the present embodiment, the band-shaped end seal portion 8a and the band-shaped side seal portion 8b are collectively referred to as band-shaped seal portions 8a and 8b.

The film joining section 6 has an unsealed section 9 outside the vapor discharge sealing section 7. The unsealed portion 9 is an outer unsealed portion surrounded by the end seals 8a, the side seal 8b, and the vapor discharge seal 7, which overlap and heat seal the opening side upper surface portion 2a and the depth side upper surface portion 2 b. The unsealed portion 9 is configured to have a polygonal unsealed portion 9a formed along the vapor discharge seal portion 7 and a band-shaped unsealed portion 9b connected to the polygonal unsealed portion 9 a. The band-shaped unsealed portion 9b is formed along the band-shaped end sealing portion 8 a. In this case, it is not necessary to form the band-like unsealed portion 9b.

As shown in fig. 2, the vapor discharge seal portion 7 has a shape protruding in a substantially V-shape curved toward the inside of the package bag 100, and two starting points 71, which are two points at which the vapor discharge seal portion 7 starts to become substantially V-shapes, are connected to the band-shaped end seal portion 8 a. The substantially V-shaped tip 70 of the vapor discharge seal portion 7 is located further toward the inside of the bag than the line connecting the start points 71, 71. The vapor discharge sealing portion 7 of the present embodiment is formed by a portion in the inner direction of the package 100 than a line connecting two points, that is, the start points 71 and 71.

The polygonal unsealed portion 9a constituting the unsealed portion 9 is constituted by a region divided by: along the substantially V-shaped protruding shape line 9a1 of the vapor discharge seal portion 7, two connecting lines 9a2, 9a2 connected to the end portions 91, 91 of the protruding shape line 9a1 and connected to the band-shaped unsealed portion 9b, and a base line 9a3 connected to the end portions 92, 92 of the two connecting lines 9a2, 9a 2. The tip 90 of the protruding line 9a1 of the polygonal unsealed portion 9a is located closer to the bag inside direction than the line connecting the ends 91, which are two points from which the protruding line 9a1 starts.

As shown in fig. 2, the vapor-discharge seal portion 7 of the present embodiment is formed by heat sealing, and has an inner curved shape 7a1 protruding in a V shape toward the inside of the package bag 100, which is not adjacent to the unsealed portion 9, and an outer curved shape (corresponding to the protruding shape line 9a1 and the connecting line 9a 2) toward the outside of the package bag 100, which is adjacent to the unsealed portion 9, and the vapor-discharge seal portion 7 is narrower toward the distal end 70 side than the other portion, at least at two points where the V shape starts, that is, the sealing width of the distal end portion between the starting points 71, 71 is different from the sealing width of the other portion. Therefore, when the internal pressure of the packaging bag 100 increases and the packaging bag 100 expands, only the distal end 70 side of the vapor-discharge sealing portion 7 peels off and opens, and a vapor discharge portion for discharging vapor and the like in the packaging bag 100 is formed by the open region and the unsealed portion 9 (in particular, the polygonal unsealed portion 9 a). The steam and the like in the package 100 are discharged to the outside from the steam discharge portion. Accordingly, even if the internal pressure of the package bag 100 increases and the package bag 100 expands, the steam and the like in the package bag 100 are discharged from the steam discharge portion to the outside, and thus the package bag 100 can be prevented from being broken.

As shown in fig. 3 (b), the vapor discharge portion is formed by a polygonal unsealed portion 9a and a region from the tip 70 of the vapor discharge seal portion 7 to a line connecting the ends 91, 91 of the protruding shape line 9a1 to each other.

The film-closing portion 6 is provided on the upper surface portion 2, and therefore, the vapor-discharging seal portion 7 forming the vapor-discharging portion is located above the upper surface of the content D in the package 100. Among them, the film-closing portion 6 is preferably provided at a position outside the center in the longitudinal direction of the package bag. This makes it easy to concentrate the pressure by the vapor discharge sealing portion 7 when the internal pressure is increased by the vapor, and thus the unsealing performance is good. Further, notches 11, 11 for unsealing the package bag 100 after heating and pressure cooking are provided near the film closing portion 6 side of the side seal portions 3, preferably at positions further inward than the film closing portion 6. In the package 100 of the present embodiment, the package 100 is opened from the notches 11 and 11, and the content D is taken out from the package 100.

When the package bag 100 in the sealed state shown in fig. 1 (b) is heated by a microwave oven, steam or the like is generated in the package bag 100, and the package bag 100 is inflated at a high temperature and a high pressure. Then, as shown in fig. 3 (a), the main body portion of the package bag 100 composed of the lower surface portion 1 and the upper surface portion 2 is inflated to a circular shape in vertical cross section, and the space divided by the vapor-discharge seal portion 7, the band-shaped end seal portion 8a, and the band-shaped side seal portion 8b of the film-closing portion 6 is inflated. As a result, the force is concentrated on the portion constituting the distal end 70 of the vapor-discharge sealing portion 7 of the film combining portion 6, and as shown in fig. 3 b, the heat-sealed portion peels off from the distal end 70 of the vapor-discharge sealing portion 7, and the region from the distal end 70 of the vapor-discharge sealing portion 7 to the line connecting the ends 91, 91 of the protruding shape line 9a1 is opened, and the vapor discharge portion for discharging the water vapor and the like in the package bag 100 is formed by the opened region and the unsealed portion 9 (the polygonal unsealed portion 9a, the band-shaped unsealed portion 9 b). This allows the steam and the like generated in the package bag 100 to be discharged from the steam discharge unit to the outside. When the water vapor or the like in the package bag 100 is discharged to the outside, a sound such as "scratching" is emitted, and thus the package bag 100 can be notified of the opening by the sound. As a result, even when the package bag 100 is heated or pressure-cooked by the microwave oven, the package bag 100 can be grasped by sound when the package bag 100 is left or other things are performed, and therefore, it is possible to prevent the package bag 100 from being opened from being seen in advance.

When the packaging bag 100 of the present embodiment is heated and inflated by a microwave oven, as shown in fig. 4, a sealing portion, that is, an edge portion 7a protruding inward of the bag from the band-shaped end sealing portion 8a is formed in a region from the tip end 70 of the vapor discharge sealing portion 7 to a line connecting the end portions 91, 91 of the protruding shape line 9a1 to each other, and a region from a position where the end portions 91, 91 are connected to each other to a position where the two points starting to be V-shaped, that is, the starting points 71, 71 are connected to each other. That is, in the packaging bag 100 of the present embodiment, when the vapor-releasing seal portion 7 is peeled off, the other portion of the vapor-releasing seal portion 7 other than the tip end portion is connected to the band-shaped tip seal portion 8a and remains, and the remaining other portion forms the edge portion 7a protruding inward from the band-shaped tip seal portion 8 a. A cylindrical vapor outlet is formed between the edge portions 7a.

Since the package 100 of the present embodiment is formed with the edge portion 7a protruding inward from the band-shaped end seal portion 8a, when the vapor in the package 100 is discharged to the outside (outside of the package 100) from the tubular vapor discharge port, a part of the vapor collides with the edge portion 7a. The vapor collides with the edge portion 7a, the flow of the vapor changes, the pressure inside the cylindrical vapor discharge port periodically changes, and the continuous up-and-down movement of the pressure forms a vortex, and the vortex vibrates, thereby generating a sound. That is, as shown in fig. 4, the vapor collides with the edge portion 7a, the flow of the vapor changes, a vortex is formed by the change in the flow of the vapor, and the vortex vibrates, thereby generating a sound. As a result, when the water vapor or the like in the package bag 100 is discharged from the cylindrical vapor discharge port to the outside, a rattle can be generated.

On the other hand, since the conventional packaging bag is not formed with the edge portion 7a protruding inward from the band-shaped end seal portion 8a as shown in fig. 4, when the conventional packaging bag is heated and inflated by a microwave oven and peeling occurs at the time of vapor discharge, the portion between the two points, i.e., the start points 71 and 71, which start to be V-shaped is instantaneously peeled off, and the vapor is discharged, so that the pressure is maintained in an equilibrium state. Therefore, even when the vapor in the package is discharged to the outside, a part of the vapor does not collide with the edge portion 7a, and in most cases, no sound is emitted.

In contrast, as shown in fig. 4, since the package 100 of the present embodiment is formed with the edge portion 7a protruding inward from the band-shaped end seal portion 8a, when the package 100 of the present embodiment is heated and inflated by the microwave oven, when the vapor in the package 100 is discharged to the outside, a part of the vapor collides with the edge portion 7a to form a vortex, and thus a sound can be emitted. As a result, the opening of the package 100 can be notified by sound. As described above, in the package 100 of the present embodiment, the sound can be emitted only by forming the edge portion with the sealing shape of the vapor discharge sealing portion 7.

The package 100 of the present embodiment has a band-shaped unsealed portion 9b located outside the band-shaped end sealed portion 8a, and the steam passes through the band-shaped unsealed portion 9b when being discharged to the outside from the steam outlet. The band-shaped unsealed portions 9b are configured in such a manner that the films are unsealed from each other, and therefore, when vapor passes through the band-shaped unsealed portions 9b, the films configuring the band-shaped unsealed portions 9b vibrate with each other, and vibration sound can be emitted.

In the package bag 100 according to the present embodiment, the vapor discharge seal portion 7 for forming the vapor discharge portion is provided in the film closing portion 6, and the film closing portion 6 is located above the upper surface level of the content D in the package bag 100, so that the content D in the package bag 100 can be prevented from being blown out and the content D in the package bag 100 can be prevented from leaking.

Further, since the expansion of the space divided by the vapor-discharge seal portion 7, the band-shaped end seal portion 8a, and the band-shaped side seal portion 8b of the film-closing portion 6 is superimposed on the expansion of the main body portion of the package bag 100 composed of the lower surface portion 1 and the upper surface portion 2, and the band-shaped end seal portion 8a and the edge portion 7a (see fig. 4) at both ends of the vapor-discharge seal portion 7 remain without peeling, the divided space symmetrically rises at the start points 71, 71 of the vapor-discharge seal portion 7, and thus stress is generated to bulge both sides of the central portion of the two films (the opening side upper surface portion 2a and the depth side upper surface portion 2 b) constituting the film-closing portion 6, as shown in fig. 3 (c), the unsealed portions 9 (9 a, 9 b) constituting the vapor-discharge portion are opened, and the vapor and the like generated in the package bag 100 are discharged to the outside. Therefore, even if a large amount of the content D is stored in the package bag 100, the unsealed portion 9 constituting the vapor discharge portion for high-pressure vapor discharge can be ensured to be positioned sufficiently high, and thus the content D can be prevented from being blown out.

As shown in fig. 5, the polygonal unsealed portion 9a constituting the vapor discharge portion is formed by a region divided by: along the protruding shape line 9a1 of the substantially V-shape of the vapor discharge seal portion 7, the two connecting lines 9a2, 9a2 connected to the end portions 91, 91 of the protruding shape line 9a1 and connected to the band-shaped unsealed portion 9b, and the base line 9a3 connected to the end portions 92, 92 of the two connecting lines 9a2, the polygonal unsealed portion 9a defines the opening area (α1, α2 shown in fig. 5) of the vapor discharge portion, so that the discharge amount per unit time of the vapor or the like discharged to the outside can be controlled.

For example, as shown in fig. 5 (a), when the opening area α1 obtained by connecting the end portions 91, 91 of the protruding shape line 9a1 is long, that is, when the length of the portion having a narrow sealing width is long, the amount of water vapor or the like discharged to the outside per unit time is large, whereas as shown in fig. 5 (b), when the opening area α2 obtained by connecting the end portions 91, 91 of the protruding shape line 9a1 is short, the amount of water vapor or the like discharged to the outside per unit time is small.

In the package bag 100 of the present embodiment, the protruding shape line 9a1 on the side of the distal end 90 constituting the polygonal unsealed portion 9a is defined in advance, and the sealing width on the distal end side is made smaller than the sealing width of the other portion so as to be substantially identical to the inside curved shape 7a1 on the side of the distal end 70 constituting the vapor discharge sealing portion 7. The ends 91, 91 of the protruding shape line 9a1 are positioned at least further inside the package bag 100 than the line connecting the start points 71, 71 of the vapor discharge seal portion 7. By this, the package 100 is heated by the microwave oven to expand the package 100, and the opening regions α1, α2 can be formed by opening the region from the tip 70 of the vapor discharge seal portion 7 to the line connecting the ends 91, 91 of the protruding shape line 9a 1. More specifically, the seal widths β1 and β2 shown in fig. 5 (a) and (b) are widths in a direction parallel to the direction of the stress acting on the exhaust steam seal portion 7. As shown in fig. 5, in the vapor discharge sealing portion 7 of the present embodiment, the sealing width β1 of the region sandwiched between the inner curved shape 7a1 and the 1 st outer curved shape (corresponding to the protruding shape line 9a 1) is smaller than the sealing width β2 of the region sandwiched between the inner curved shape 7a1 and the 2 nd outer curved shape (corresponding to the connecting line 9a 2). Therefore, when the vapor and the pressure are concentrated on the vapor discharge sealing portion 7, only the portion having the sealing width β1 is peeled off, and the discharge amount per unit time of the vapor and the like generated in the package bag 100 can be suppressed. In addition, only the portion having the seal width β1 is peeled off, and the portion having the seal width β2 is connected to the band-shaped end seal portion 8a and remains, and the remaining portion forms an edge portion 7a protruding inward from the band-shaped end seal portion 8a (see fig. 4 (a)). Therefore, when the vapor in the package 100 is discharged to the outside, a part of the vapor collides with the edge 7a to form a vortex, and the sound can be emitted.

In the opened package bag 100 of the present embodiment, when the opening side is directed downward in parallel with the connecting line 9a2, the opening of the vapor-discharge sealing portion 7 is closed, and the package bag can function as a safety valve for preventing leakage of the content D. As a result, the packaging bag 100 after being heated and pressure-cooked can be safely taken out from the microwave oven.

In the package bag 100 according to the present embodiment, the bottom line 9a3 is set for the convenience of description of the shape of the polygonal unsealed portion 9a, and is not actually provided in the package bag 100. In the package bag 100 according to the present embodiment, the polygonal unsealed portion 9a and the band-shaped unsealed portion 9b are not divided by the bottom line 9a3, but are integrated, and the bottom line 9a3 is a portion constituting a discharge port for discharging water vapor and the like to the outside.

Operation and Effect of the packaging bag 100 of the present embodiment

As described above, the packaging bag 100 according to the present embodiment has the vapor-discharge sealing portion 7 protruding in a V-shaped curve toward the inside of the packaging bag 100 as shown in fig. 2, and the unsealed portions 9 (9 a, 9 b) adjacent to the vapor-discharge sealing portion 7 and formed on the outside of the vapor-discharge sealing portion 7 in an unsealed manner, and when the internal pressure of the packaging bag 100 increases to expand the packaging bag 100, as shown in fig. 3 (b), the vapor-discharge sealing portion 7 opens, and a vapor discharge portion for discharging water vapor and the like in the packaging bag 100 is formed by the open region and the unsealed portions 9 (9 a, 9 b). The vapor discharge seal portion 7 forming the vapor discharge portion of the present embodiment is formed by heat sealing, has an inner curved shape 7a1 on the inner side of the package bag 100, which is not adjacent to the unsealed portion 9, and outer curved shapes 9a1 and 9a2 on the outer side of the package bag 100, which are adjacent to the unsealed portion 9, and is formed of a portion in the inner direction of the package bag 100 than a line connecting two points, that is, the start points 71 and 71, which start forming a V-shape. The widths β1 and β2 of the heat-sealed region of the exhaust steam seal portion 7 are narrower (β1 < β2) on the distal end 70 side of the exhaust steam seal portion 7.

Therefore, when the packaging bag 100 of the present embodiment is heated and inflated by a microwave oven, as shown in fig. 4, the tip end portion constituting the vapor-exhausting seal part 7 is peeled off, and the other portion other than the tip end portion is connected to the band-shaped tip seal part 8a and remains, and the remaining other portion forms the edge part 7a protruding inward from the band-shaped tip seal part 8 a. A cylindrical vapor outlet is formed between the edge portions 7a. As a result, when the water vapor or the like in the package bag 100 is discharged from the cylindrical vapor discharge port to the outside, a rattle can be generated. Further, the sound can be emitted only by the seal shape of the vapor discharge seal portion 7.

In the packaging bag 100 of the present embodiment, the positions of the ends 91 and 91 of the protruding shape line 9a1 are varied on the protruding shape line 9a1 defined in advance without changing the shape of the inside curved shape 7a1 of the vapor discharge seal portion 7, and as shown in fig. 5, the opening area α obtained by connecting the ends 91 and 91 to each other can be changed, and the discharge amount per unit time of the vapor and the like discharged to the outside can be controlled. Therefore, stress concentration due to vapor can be effectively generated, and the opening area α can be controlled without cracking the packaging bag 100, so that cooking can be performed at an appropriate pressure.

Here, the two connecting lines 9a2 constituting the polygonal unsealed portion 9a of the packaging bag 100 according to the present embodiment are configured such that the width of the opening region α obtained by connecting the end portions 91, 91 to each other is the same as the width of the base line 9a3 (the width between the connecting lines 9a 2). However, the two connecting lines 9a2 may be configured as follows: the width of the bottom line 9a3 (the width between the connecting lines 9a 2) is smaller than the width of the opening region α obtained by connecting the end portions 91, 91. This can reduce the discharge port for discharging the steam and the like generated in the package bag 100 to the outside, and thus can raise the pressure in the package bag 100.

As shown in fig. 2, the protruding shape line 9a1 on the side of the distal end 90 of the polygonal unsealed portion 9a constituting the packaging bag 100 according to the present embodiment is configured to have the same shape as the inside curved shape 7a1 on the side of the distal end 70 constituting the vapor discharge seal portion 7, so that the seal width β1 of the vapor discharge seal portion 7 is kept constant. However, if the amount of change in the seal width β1 of the exhaust steam seal portion 7 is within a predetermined range, the protruding shape line 9a1 of the polygonal unsealed portion 9a does not have to be formed in the same shape as the inside curved shape 7a1 of the exhaust steam seal portion 7, but may be formed in substantially the same shape as the inside curved shape 7a1 of the exhaust steam seal portion 7. The substantially identical shape is a shape slightly different from the inner curved shape 7a 1.

(example 2 of embodiment 1)

Next, example 2 of embodiment 1 will be described.

As shown in fig. 6, the band-shaped end seal portion 80a of example 2 of embodiment 1 is configured to be tapered and configured such that the width γ of the band-shaped end seal portion 80a becomes wider as the start point 71 of the self-venting vapor seal portion 7 goes toward the end portion in the longitudinal direction of the film-closing portion 6 (γ1 < γ2).

As a result, when the space divided by the vapor discharge sealing portion 7, the band-shaped end sealing portion 80a, and the band-shaped side sealing portion 8b of the film combining portion 6 expands, a force can be locally applied to the portion of the distal end 70 of the vapor discharge sealing portion 7, as compared with example 1 of embodiment 1. As a result, the vapor-discharge sealing portion 7 can be easily peeled off as compared with example 1 of embodiment 1.

Further, since the width γ of the band-shaped end seal portion 80a becomes wider from the start point 71 of the vapor discharge seal portion 7 toward the end portion in the longitudinal direction of the film closing portion 6, the flow of vapor is more likely to change than the shape shown in fig. 2, and a swirl is more likely to be formed, so that sound can be easily emitted. When the vapor discharge portion is formed, the vapor and the like in the package bag 100 are easily accumulated in the vapor discharge portion, and thus can easily generate a sound. As a result, the opening of the package bag 100 can be effectively notified as compared with example 1 of embodiment 1.

In the package bag 100 according to the present embodiment, the band-shaped end seal portion 80a is formed in a tapered shape, and therefore, the heat seal area of the band-shaped end seal portion 80a is larger than that of example 1 according to embodiment 1. Therefore, the non-sealing portion 80b is formed in the region where the band-shaped end sealing portion 80a is formed. This can suppress air bubbles, wrinkles, and the like generated in the area of the band-shaped end seal portion 80a when the band-shaped end seal portion 80a is heat-sealed, and thus can maintain a stable seal strength.

Operation and Effect of the packaging bag 100 of the present embodiment

In this way, in the packaging bag 100 of the present embodiment, the width γ of the band-shaped end seal portion 80a connected to the both ends of the vapor discharge seal portion 7 is configured to be tapered and widened (γ1 < γ2) as the positions of the start points 71, 71 at the both ends of the vapor discharge seal portion 7 move toward the side of the packaging bag 100. As a result, compared with example 1 of embodiment 1, the force can be locally applied to the distal end 70 of the exhaust steam seal portion 7. In addition, compared with example 1 of embodiment 1, the vapor-discharge sealing portion 7 can be easily peeled off, and the sound can be easily emitted.

Further, since the non-sealing portion 80b is provided in the area of the band-shaped end sealing portion 80a, bubbles generated in the area of the band-shaped end sealing portion 80a can be absorbed by the non-sealing portion 80b, and generation of wrinkles or the like can be suppressed, so that stable sealing strength can be maintained.

However, if the band-shaped end seal portion 80a of the present embodiment is configured such that the width γ becomes gradually wider (γ1 < γ2) as the positions of the start points 71, 71 at both ends of the self-venting vapor seal portion 7 move toward the side of the package bag 100, the shape of the band-shaped end seal portion 80a is not limited to the shape shown in fig. 6, and may be any shape. For example, in fig. 6, the band-shaped end seal portion 80a may be formed in a straight line or may have a curved line in a part thereof.

(example 3 of embodiment 1)

Next, example 3 of embodiment 1 will be described.

The vapor discharge sealing portion 7 of example 3 of embodiment 1 is configured as shown in fig. 7 (a), for example: a seal width β2 having a constant width including a region sandwiched between the inside curved shape 7a1 and the 2 nd outside curved shape 9a2 and a seal width β1 having a constant width including a region sandwiched between the inside curved shape 7a1 and the 1 st outside curved shape 9a1 are included, and the seal width β1 is narrower than the seal width β2. In the case of the shape of fig. 7 (a), as in examples 1 and 2 of embodiment 1, the width β1 of the region between the inner curved shape 7a1 and the 1 st outer curved shape 9a1 is smaller than the width β2 of the region between the inner curved shape 7a1 and the 2 nd outer curved shape 9a2, and therefore, when the bag is heated and inflated by a microwave oven, only the thin portion of the width β1 constituting the tip end portion of the vapor-evacuation seal portion 7 peels off, the width β2 of the other portion other than the tip end portion width β1 is connected to the band-shaped tip seal portion 8a and remains, and the width β2 of the remaining other portion forms an edge portion protruding inward from the band-shaped tip seal portion 8a, so that a sound such as "pop-up" can be emitted when the water vapor or the like in the bag 100 is discharged to the outside.

As shown in fig. 7 (b), the outer curved shape 9a2 of the exhaust gas seal portion 7 of example 3 of embodiment 1 is constituted by one curved shape 9a2, and the seal widths β1 and β2 of the region between the inner curved shape 7a1 and the outer curved shape 9a2 are constituted so as to be narrower toward the tip end of the exhaust gas seal portion 7. This makes it possible to sequentially narrow the seal widths β1 and β2 of the region between the inner curved shape 7a1 and the outer curved shape 9a2 toward the tip of the vapor discharge seal portion 7. In the case of the shape shown in fig. 7 (b), as in examples 1 and 2 of embodiment 1, the widths β1 and β2 of the region between the inner curved shape 7a1 and the outer curved shape 9a2 of the vapor discharge seal portion 7 become narrower toward the front end of the vapor discharge seal portion 7, and therefore, when the vapor discharge seal portion 7 is heated and expanded by the microwave oven, the portion up to the substantially central portion of the vapor discharge seal portion 7 peels off, and the remaining portion of the vapor discharge seal portion 7 is connected to the band-shaped end seal portion 8a to form an edge portion, so that when the vapor and the like in the package bag 100 are discharged to the outside, a rattle can be generated.

The vapor discharge sealing portion 7 of example 3 of embodiment 1 is configured as shown in fig. 7 (c), for example: the seal width β1 of the distal end region of the vapor discharge seal portion 7, which is sandwiched at least between the inner curved shape 7a1 and the 1 st outer curved shape 9a1, is narrower than the seal width β2 of the other portion. The 2 nd outer curved shape 9a2 is formed of a plurality of straight lines, a substantially quadrangular wide region, that is, a vapor convection portion is formed in the center of the polygonal unsealed portion 9a, and a narrower region is formed above and below the polygonal unsealed portion 9a than the central wide region. In the case of the shape shown in fig. 7 (c), too, as in examples 1 and 2 of embodiment 1, the width β1 of the region between the inner curved shape 7a1 and the 1 st outer curved shape 9a1 is narrower than the width β2 of the other region, and therefore, when the microwave oven is used for heating and expansion, the width β1 of the tip end portion constituting the vapor-discharge seal portion 7 peels off, the width β2 of the other portion other than the tip end portion width β1 is connected to the band-shaped tip seal portion 8a, and remains, and the width β2 of the remaining other portion forms an edge portion protruding inward from the band-shaped tip seal portion 8 a. In the case of the shape shown in fig. 7 (c), a vapor convection section, which is a wide area of a substantially square shape, is formed in the center of the polygonal unsealed section 9a, and a narrow area, which is narrower than the wide area in the center, is formed above and below the polygonal unsealed section 9a, so that when the width β1 of the tip end portion constituting the vapor discharge sealed section 7 is peeled off and vapor is discharged from the polygonal unsealed section 9a to the outside, a vortex is formed on both sides of the vapor convection section, which is the wide area of the polygonal unsealed section 9a, as shown in fig. 8. As a result, a rattle such as "rattle" can be emitted due to the eddies formed on both sides of the wide area of the polygonal unsealed portion 9 a. The shape of the vapor convection section does not have to be a straight line, and may be a curved shape or the like, for example, having a narrow unsealed section in the upper and lower directions and a wide unsealed section in the center.

Operation and Effect of the packaging bag 100 of the present embodiment

As described above, the vapor-tight seal portion 7 of the packaging bag 100 according to the present embodiment is configured as shown in fig. 7 (a): a seal width β2 having a constant width including a region sandwiched between the inside curved shape 7a1 and the 2 nd outside curved shape 9a2 and a seal width β1 having a constant width including a region sandwiched between the inside curved shape 7a1 and the 1 st outside curved shape 9a1 are included, and the seal width β1 is narrower than the seal width β2. As shown in fig. 7 (b), the structure is as follows: the seal widths β1, β2 of the region sandwiched between the inner curved shape 7a1 and the outer curved shape 9a2 become narrower toward the tip of the vapor discharge seal portion 7. As shown in fig. 7 (c), the structure is as follows: the seal widths β1, β2 of the regions sandwiched between the inner curved shape 7a1 and the outer curved shapes 9a1, 9a2 are different from each other, and the seal width of the width β1 of the tip portion is narrower than the seal width of the width β2 of the other portion.

Accordingly, when the bag is heated and expanded by the microwave oven, the width β1 of the tip end portion constituting the vapor discharge sealing portion 7 is peeled off, and the width β2 of the other portion other than the width β1 of the tip end portion is connected to the band-shaped tip sealing portion 8a and remains, and the width β2 of the remaining other portion forms an edge portion protruding inward from the band-shaped tip sealing portion 8a, so that when the water vapor or the like in the bag 100 is discharged to the outside, a rattle can be generated.

Example (example)

Next, an example of the above embodiment will be described with reference to fig. 9 and 10. The following examples are examples, and the technical ideas of the present embodiment are not limited to the following examples. Fig. 9 shows a configuration example before and after peeling off the vapor-permeable sealing portions of the packaging bags of examples 1 to 5 to be described below, and fig. 10 shows a configuration example before and after peeling off the vapor-permeable sealing portions of the packaging bags of comparative examples 1 to 2. Fig. 9 and 10 show the state before and after the peeling of the vapor-discharge sealing portion, and the broken line shows the portion of the sealing portion of the vapor-discharge sealing portion where the peeling occurs.

A packaging bag having an opening 4 on one side as shown in fig. 1 (a) was formed by sealing a laminate film having an outer layer made of 15 μm nylon and an inner layer made of 60 μm linear low-density polyethylene with a sealing tape. The formed package was filled with a cloth containing water as a content, and then the opening 4 was sealed to prepare a package having a vapor-discharge sealing portion 7 in a film-closing portion 6 as shown in fig. 1 (b). The tests were performed on 20 package samples 20: the shape of the seal after vapor discharge and the sound of "scratching" are generated when each sample is heated and cooked by a microwave oven.

Example 1

As shown before peeling in fig. 9 (a), the vapor-discharge sealing portion 7 of the packaging bag of example 1 is configured to protrude in a substantially V-shape, and the sealing width at only the tip end is narrow.

After cooking by a microwave oven, as shown in fig. 9 (b), 15 samples out of the 20 samples were sounded as a "crack", and an edge portion protruding inward from the band-shaped end seal portion was formed.

Example 2

As shown before peeling in fig. 9 (c), the tape-shaped end seal portion of the package bag of example 2 is formed in a tapered shape. The other structures are the same as those of example 1 shown before the peeling of fig. 9 (a).

When the pressure in the package increases and the package expands after cooking by heating in a microwave oven, 18 samples out of 20 samples make a "crack" sound, and an edge portion protruding inward from the band-shaped end seal portion is formed as shown in fig. 9 (d) after peeling.

Example 3

As shown before peeling off in fig. 9 (e), the package bag of example 3 is configured as follows: the sealing width of the tip of the vapor-venting sealing part is narrow, and a pair of outer sealing parts in a straight line parallel to the vapor-venting direction are provided so that the vapor passage (unsealed part) after peeling is cylindrical, and the unsealed part outside the vapor-venting sealing part is in a home-base shape. Other structures are the same as those of embodiment 2.

After cooking by heating in a microwave oven, 19 samples out of the 20 samples were "scratched", and as shown in fig. 9 (f), an edge portion protruding inward from the band-shaped end seal portion was formed.

Example 4

As shown before peeling off in fig. 9 (g), the package bag of example 4 is configured as follows: the seal width gradually narrows as it goes toward the front end of the vapor discharge seal portion. Other structures are the same as those of embodiment 2.

After cooking by heating in a microwave oven, 14 samples out of the 20 samples were "scratched", and as shown in fig. 9 (h), an edge portion protruding inward from the band-shaped end seal portion was formed.

Example 5

As shown before peeling off of fig. 9 (i), the package bag of example 5 is configured as follows: the seal width becomes narrower as going toward the front end of the vapor discharge seal portion 7. A wide region of a substantially quadrangular shape, that is, a vapor convection section is formed in the passage of the vapor after stripping (center of the polygonal unsealed section), and a narrow region narrower than the wide region in the center is formed above and below the polygonal unsealed section. Other structures are the same as those of embodiment 1.

After cooking by heating in a microwave oven, 20 samples out of the 20 samples were made to sound as a "crack", and as shown in fig. 9 (j), an edge portion protruding inward from the band-shaped end seal portion was formed.

Comparative example 1

As shown before peeling off in fig. 10 (k), the package bags of comparative example 1 were all the same in sealing width of the vapor-discharge sealing portion. Other structures are the same as those of embodiment 1.

After cooking by heating in a microwave oven, 6 samples out of the 20 samples emitted a "crack" sound, and as shown in fig. 10 (l) after peeling, no edge portion protruding inward from the band-shaped end seal portion was formed.

Comparative example 2

As shown before peeling off in fig. 10 (m), the sealing widths of the vapor-discharge sealing portions were the same for the packaging bag of comparative example 2. Further, a linear slit is formed in an unsealed portion of the laminated film surrounded by the band-shaped end seal portion and the vapor discharge seal portion so that vapor can be discharged from the slit to the outside.

After cooking by heating in a microwave oven, 3 samples out of the 20 samples emitted a "crack" sound, and as shown in fig. 10 (n), after peeling, no edge portion protruding inward from the band-shaped end seal portion was formed.

(test results)

From the above test results, it was found that the package bags of examples 1 to 5, which formed the edge portion when the vapor-tight seal portion was peeled off, produced a "crack" sound in almost all the samples when the package bags were heated and cooked by a microwave oven. This is because, when the vapor in the package bag is discharged to the outside, the vapor collides with the edge portion, and the flow of the vapor is changed to form a vortex, thereby generating a sound.

Further, it was found that the tape-shaped end seal portions were formed in a tapered shape as in the case of the package bags of examples 2 to 4, and the sounds such as "cracks" were more likely to be generated. This is because the band-shaped end seal portion is tapered, so that the flow of vapor is more likely to change than the shape shown in example 1, and a swirl is more likely to be formed, and thus sound can be easily emitted. In addition, when the vapor discharge portion for discharging the vapor to the outside is formed, the vapor and the like in the package bag are easily accumulated in the vapor discharge portion, and thus the sound can be easily emitted.

Further, as in the case of the package bag of example 5, a wide region having a substantially quadrangular shape was formed in the center of the polygonal unsealed portion forming the vapor discharge portion, and a narrow region, i.e., a vapor convection portion, was formed above and below the polygonal unsealed portion, which was narrower than the wide region in the center, so that sounds such as "cracks" were reliably emitted. This is because, when the vapor is discharged to the outside from the polygonal unsealed portion constituting the vapor discharge portion, a vortex is formed on both sides of the wide area of the polygonal unsealed portion, and the formed vortex can reliably produce a rattling sound such as "cracking".

The above-described embodiments and examples are preferred embodiments and examples of the present invention, and the scope of the present invention is not limited to the above-described embodiments and examples, and the present invention can be implemented in various modified embodiments without departing from the gist of the present invention.

For example, in the above embodiment, the packaging bag 100 is provided with the film closing portion 6, the vapor-discharging seal portion 7 and the unsealed portion 9 are provided at the edge of the film closing portion 6, and the vapor-discharging portion is formed at the edge of the film closing portion 6. However, this can also be the case: the package 100 is not provided with the film-closing portion 6, the edge of the package 100 composed of the lower surface portion 1 and the upper surface portion 2 is provided with the vapor-discharging seal portion 7 and the unsealed portion 9, and the edge of the package 100 is provided with the vapor-discharging portion. In this case, the same effects as those of the above-described embodiment can be obtained. However, in the case of the package bag 100 provided with the film closing portion 6 as in the above-described embodiment, when the package bag 100 is heated by a microwave oven and the package bag 100 is inflated as shown in fig. 3 (a), the inflation of the space divided by the vapor-evacuation seal portion 7, the band-shaped end seal portion 8a, and the band-shaped side seal portion 8b of the film closing portion 6 is superimposed on the inflation of the main body portion of the package bag 100 constituted by the lower surface portion 1 and the upper surface portion 2, and therefore, the portion of the film closing portion 6 becomes the portion that is most likely to be inflated by water vapor or the like. Therefore, by providing the vapor-discharge sealing portion 7 and the unsealed portion 9 at the edge of the film-closing portion 6 to form the vapor-discharge portion as in the above-described embodiment, the distal end 70 of the vapor-discharge sealing portion 7 is easily peeled off by the vapor generated in the package bag 100 or the like, and the vapor-discharge portion can be easily formed and the sound can be easily emitted. Further, the discharge amount per unit time of the steam or the like generated in the package bag 100 can be effectively suppressed.

In addition to this method, the tip portion of the vapor discharge sealing portion 7 sandwiched between the inner curved shape 7a1 and the 1 st outer curved shape 9a1 is made narrower than the other portions to peel off the tip portion, and for example, a mode in which an easily peelable portion or the like is formed only in the tip portion by an easily peelable resin, only the peel strength of the tip portion is weakened without being limited by the size of the sealing width, and only the tip portion is peeled off to form the edge portion 7a when the pressure due to vapor acts on the vapor discharge sealing portion 7 can be applied.

The shape of the vapor discharge seal portion 7 is not limited to the V-shape, and may be, for example, a circular arc shape. In the vapor discharge sealing portion 7, the portion having weak peel strength is not limited to the tip portion of the vapor discharge sealing portion 7 (the intermediate position of the strip-shaped side sealing portions 8a on both sides), but may be formed at an end portion of the vapor discharge sealing portion 7 where an edge portion is formed only on one side, for example.

With the present invention, sound can be emitted with a simple configuration in which only the shape of the seal portion formed by sealing the film is formed.

Embodiment 2

The present embodiment relates to an improvement in sound generated when vapor is discharged, and aims to suppress sound.

In patent documents 1 and 3, the pressure inside the package bag is prevented from rising by discharging the vapor generated inside the package bag to the outside. For example, in patent document 1, the vapor-discharging seal portion is peeled off first, and the vapor is discharged from the seal portion to the outside. In patent document 3, steam is emitted from a steam permeable portion provided in a sealing portion.

However, in patent documents 1 and 3, when the vapor generated inside the package bag is discharged to the outside, the user may be frightened by the sound such as "scratching".

Therefore, it is recognized that it is necessary to develop a package that does not emit sound when vapor generated inside the package is discharged to the outside.

The present embodiment has been made in view of the above circumstances, and an object thereof is to provide a packaging bag capable of suppressing sound emission when vapor generated inside the packaging bag is discharged to the outside.

Summary of the package bag 200 according to the present embodiment

First, an outline of the package bag 200 according to the present embodiment will be described with reference to fig. 11 to 13.

In the packaging bag 200 of the present embodiment, when the internal pressure of the packaging bag 200 increases and the packaging bag 200 expands, the vapor-discharge seal portion 7 peels off and opens, and the 1 st vapor discharge portion 101 (see fig. 13) for discharging the vapor in the packaging bag 200 to the outside is formed by the open area and the unsealed portions 9 (9 a, 9 b). The 2 nd vapor discharge portion 102 is formed in the unsealed portion 9 (in the present embodiment, the polygonal unsealed portion 9 a).

Therefore, as shown in fig. 13 (a), in the package bag 200 according to the present embodiment, the vapor generated in the package bag 200 is discharged to the outside from at least the 1 st vapor discharge portion 101 and the 2 nd vapor discharge portion 102, and the vapor can be discharged to the outside in at least two dimensions. As a result, when the vapor generated inside the package bag 200 is discharged to the outside, the generation of sound can be suppressed.

In the conventional packaging bag, the vapor generated inside the packaging bag is discharged to the outside in one-dimensional direction, and thus the structure is easy to generate sound. In contrast, in the packaging bag 200 according to the present embodiment, the vapor generated in the interior of the packaging bag 200 can be discharged to the outside in at least two dimensions (the 1 st vapor discharge portion 101 and the 2 nd vapor discharge portion 102), and therefore, the emission of sound can be suppressed. The package bag 200 according to the present embodiment is described in detail below with reference to the drawings.

(embodiment 2)

< structural example of packaging bag 200 >)

First, a structural example of the package bag 200 according to the present embodiment will be described with reference to fig. 11 to 13. Fig. 11 is a diagram showing a configuration example of the package bag 200 according to the present embodiment, and fig. 11 (a) is a perspective view of the package bag 200 before the opening 4 is sealed, and fig. 11 (b) is a perspective view of the package bag 200 sealed by heat-sealing the opening 4 with the contents D contained in the package bag 200. Fig. 12 is a diagram showing a configuration example of the vapor-discharge sealed portion 7 and unsealed portion 9 (polygonal unsealed portion 9a, band-shaped unsealed portion 9 b) provided in the film-closing portion 6 shown in fig. 11. Fig. 13 is a structural example of the package bag 200 in which the package bag 200 shown in fig. 11 (b) is heated and inflated by a microwave oven, fig. 13 (a) is a side view of the package bag 200, and fig. 13 (b) is a view showing a state in which the front end 70 of the vapor discharge seal portion 7 is opened to form the 1 st vapor discharge portion 101.

The 2 nd vapor discharge portion 102 is formed in the polygonal unsealed portion 9 a. The 2 nd vapor discharge portion 102 is formed in at least one of the two films (the opening side upper surface portion 2a and the depth side upper surface portion 2 b) constituting the polygonal unsealed portion 9a, and as shown in fig. 13 (a), the vapor and the like are discharged from the 2 nd vapor discharge portion 102 to the outside in directions different from the directions in which the vapor and the like are discharged from the 1 st vapor discharge portion 101 to the outside.

Thus, the package bag 200 according to the present embodiment can discharge water vapor or the like in the package bag 200 to the outside in two dimensions. As a result, even if the internal pressure of the packaging bag 200 increases and the packaging bag 200 expands, the steam and the like in the packaging bag 200 can be discharged to the outside from at least the 1 st steam discharge portion 101 and the 2 nd steam discharge portion 102, and therefore, the packaging bag 200 can be prevented from being ruptured. When the steam or the like generated in the package bag 200 is discharged to the outside, the generation of sound can be suppressed.

The shape of the 2 nd vapor discharge portion 102 formed in the polygonal unsealed portion 9a is not particularly limited, and may be any shape as long as the vapor and the like in the package bag 200 can be discharged to the outside, and may be formed by punching or the like. For example, the 2 nd vapor discharge portion 102 may be formed of a slit such as an arc, a straight line, a V-shape, or a U-shape, or a notch such as a circle, a triangle, a quadrangle, a trapezoid, or a polygon. Further, the vapor discharge amount per unit time is preferably large by not being linear but being polygonal or circular. In the present embodiment, the 2 nd vapor discharge portion 102 having the same shape is formed on both the opening side upper surface portion 2a and the depth side upper surface portion 2b constituting the polygonal unsealed portion 9a, but the 2 nd vapor discharge portion 102 having a different shape may be formed only on the opening side upper surface portion 2a or the depth side upper surface portion 2 b.

In the package bag 200 of the present embodiment, the connecting line 9a20 is provided for the convenience of description of the shape of the polygonal unsealed portion 9a, and is not actually provided in the package bag 200. In the package bag 200 of the present embodiment, the polygonal unsealed portion 9a and the band-like unsealed portion 9b are not divided by the connecting line 9a20 but are integrated, and the connecting line 9a20 is a portion constituting a discharge port for discharging water vapor and the like to the outside.

Operation and Effect of the packaging bag 200 of the present embodiment

As described above, the packaging bag 200 of the present embodiment has the vapor-discharge sealing portion 7 protruding in a curved shape toward the inside of the packaging bag 200 as shown in fig. 12, and the unsealed portion 9 (the polygonal unsealed portion 9a, the band-shaped unsealed portion 9 b) formed adjacent to the vapor-discharge sealing portion 7 and unsealed on the outside of the vapor-discharge sealing portion 7, and when the internal pressure of the packaging bag 200 increases and the packaging bag 200 expands, the vapor-discharge sealing portion 7 opens as shown in fig. 13 b, and the 1 st vapor discharge portion 101 is formed by the open region and the unsealed portion 9 (the polygonal unsealed portion 9a, the band-shaped unsealed portion 9 b). In the unsealed portion 9 (in the present embodiment, the polygonal unsealed portion 9 a), a2 nd vapor discharge portion 102 is formed.

In the package bag 200 according to the present embodiment, the steam and the like generated in the package bag 200 are discharged to the outside from at least the 1 st steam discharge portion 101 and the 2 nd steam discharge portion 102, and the steam and the like can be discharged to the outside in at least two dimensions. As a result, a large amount of vapor can be discharged to the outside, and the sound generated when the vapor or the like generated in the package bag 200 is discharged to the outside can be suppressed.

As shown in fig. 12, the protruding shape line 9a10 on the tip 90 side of the polygonal unsealed portion 9a constituting the packaging bag 200 according to the present embodiment is configured to have the same shape as the inside curved shape 7a1 on the tip 70 side constituting the vapor discharge seal portion 7, so that the seal width of the vapor discharge seal portion 7 is kept constant. However, if the amount of change in the sealing width of the vapor discharge sealing portion 7 is within a predetermined range, the protruding shape line 9a10 of the polygonal unsealed portion 9a does not have to be formed in the same shape as the inside curved shape 7a1 of the vapor discharge sealing portion 7, but may be formed in substantially the same shape as the inside curved shape 7a1 of the vapor discharge sealing portion 7. The substantially identical shape is a shape slightly different from the inner curved shape 7a 1.

In the above-described embodiment, a configuration example in which the steam and the like in the package bag 200 are discharged to the outside from at least the 1 st steam discharge portion 101 and the 2 nd steam discharge portion 102, and the steam generated in the package bag 200 is discharged to the outside in at least two dimensions has been described. However, the present invention is not limited to the two-dimensional direction, and a new vapor discharge portion may be provided in the packaging bag 200 to discharge the vapor generated in the packaging bag 200 in the multi-dimensional direction.

Embodiment 3

This embodiment relates to an improvement in peelability of a vapor-discharge sealing portion.

The packaging bags having the vapor-discharge sealing portions disclosed in patent documents 1 and 4 have the following problems: when the pressure increases, stress locally concentrates on the corner portions formed by connecting the seal portions, and the like, and peeling occurs from the portions of the corner portions and the like where peeling is not desired, resulting in leakage of contents and the like.

The present embodiment has been made in view of the above circumstances, and an object thereof is to provide a packaging bag having a vapor-exhausting seal portion, which can prevent peeling from an undesired portion.

(outline of the packaging bag 300 of the present invention)

The package 300 according to the present embodiment will be described with reference to fig. 11. The packaging bag 300 is characterized in that the packaging bag 300 has a vapor-discharge sealing portion 7, and a seal portion (for example, a portion denoted by reference numeral 8 b) of a corner portion formed by connecting a 1 st seal portion 8a in a band shape and a 2 nd seal portion 8b in a band shape has the highest peel strength, the 1 st seal portion 8a in a band shape is connected to the vapor-discharge sealing portion 7, and the 2 nd seal portion 8b in a band shape intersects with the 1 st seal portion 8 a.

In the packaging bag 300 of the present invention, since the peel strength of the seal portion of the corner portion where stress locally concentrates is highest when the internal pressure of the packaging bag 300 increases, peeling from the portion where peeling is not desired, such as the corner portion, can be suppressed. As a result, the leakage of the content D in the package 300 can be prevented. Hereinafter, an embodiment of the package 300 according to the present invention will be described in detail with reference to the accompanying drawings.

(example 1 of embodiment 3)

Structure example of packaging bag 300

The peel strength of the vapor discharge seal portion 7 is weaker than the peel strength of the heat-sealed portion of the 1 st seal portion 8a connected to the vapor discharge seal portion 7. The peel strength of the heat-sealed portion of the 1 st seal portion 8a is weaker than the peel strength of the heat-sealed portion of the 2 nd seal portion 8b intersecting the 1 st seal portion 8 a.

That is, the peel strength of each of the parts 7, 8a, 8b heat-sealed in the film-closing part 6 is configured to satisfy the following condition (1).

Condition (1)

Peel strength of vapor-exhausting seal portion 7 < peel strength of 1 st seal portion 8a < peel strength of 2 nd seal portion 8b

The package bag 300 according to the present embodiment is configured to satisfy the above condition (1), and therefore, the peel strength of the seal portion at the corner portion formed by connecting the 1 st seal portion 8a and the 2 nd seal portion 8b can be maximized. Therefore, when the internal pressure of the package 300 increases and the package 300 expands, peeling of the seal portion from the corner portion where the vapor stays and the stress tends to increase can be prevented. As a result, when the package bag 300 is inflated, the 1 st vapor discharge portion 101 can be easily formed by preventing the occurrence of peeling from an undesired portion and peeling from the distal end 70 side of the vapor discharge seal portion 7, and leakage of the content D from the undesired portion can be reliably prevented.

In addition, if the peel strength of each of the heat-sealed portions 7, 8a, 8b in the film-folding portion 6 can satisfy the condition (1) described above, the film-folding portion 6 can be configured with an arbitrary configuration. Examples of the method for making the peel strength of each of the portions 7, 8a, 8b different include a method for making the heat degree, pressure, seal width of the seal portion, and the like different at the time of heat sealing.

By making at least one of the heat degree, the pressure, the sealing width of the sealing portion, and the like different at the time of heat sealing, the peel strength of each of the heat-sealed portions 7, 8a, 8b can be made different. For example, the peel strength can be reduced by reducing the heat and pressure at the time of heat sealing. Conversely, the peel strength can be enhanced by increasing the heat and pressure at the time of heat sealing. Further, by shortening the sealing width of the sealing portion, the peel strength can be reduced. Conversely, by lengthening the seal width, the peel strength can be enhanced.

As shown in fig. 14 and 15, for example, the printed layer is formed by printing a part of both the opening side upper surface portion 2a and the depth side upper surface portion 2b of the film-forming portion 6, and the peel strength of each portion 7, 8a, 8b formed by the heat sealing can be made different by making the layer thicknesses of each portion 7, 8a, 8b forming the vapor-discharge seal portion 7, 1 st seal portion 8a, 2 nd seal portion 8b different and performing the heat sealing. Fig. 14 shows a structure example of the film-closing part 6 formed by heat-sealing the opening-side upper surface part 2a and the depth-side upper surface part 2B on which the printed layers are formed, fig. 15 is a view showing a layer structure example of each of the parts 7, 8a, 8B constituting the film-closing part 6 shown in fig. 14, fig. 15 (a) shows a layer structure example of the 2 nd sealing part 8B after the film-closing part 6 shown in fig. 14 is cut along the line A-A ', fig. 15 (B) shows a layer structure example of the 1 st sealing part 8a after the film-closing part 6 shown in fig. 14 is cut along the line B-B ', and fig. 15 (C) is a view showing a layer structure example of the vapor-discharging sealing part 7 after the film-closing part 6 shown in fig. 14 is cut along the line C-C '.

For example, as shown in fig. 15 (c), two printed layers 2b2, 2b3 are formed in the portion where the vapor-exhausting seal portion 7 is formed in the deep-side upper surface portion 2b, and as shown in fig. 15 (b), one printed layer 2b2 is formed in the portion where the 1 st seal portion 8a is formed, and as shown in fig. 15 (a), no printed layer is formed in the portion where the 2 nd seal portion 8b is formed, so that the layer thicknesses of the respective portions 7, 8a, 8b are different. In addition, as shown in fig. 15 (c), two printed layers 2a2 and 2a3 are formed in the portion where the vapor-exhausting seal portion 7 is formed in the opening-side upper surface portion 2a, and as shown in fig. 15 (b), one printed layer 2a2 is formed in the portion where the 1 st seal portion 8a is formed, and as shown in fig. 15 (a), no printed layer is formed in the portion where the 2 nd seal portion 8b is formed, so that the layer thicknesses of the respective portions 7, 8a, and 8b are different. Then, the film-closing portion 6 shown in fig. 14 is formed by heat-sealing the deep side upper surface portion 2b and the opening side upper surface portion 2a while overlapping them. Thus, the thickness of the layers of the respective portions 7, 8a, 8b constituting the film-joining portion 6 is different, and therefore the peel strength of the heat-sealed portion can be made to satisfy the above condition (1). As shown in fig. 14, the printed layers 2b2 and 2a2 formed in the portion where the vapor-discharge sealing portion 7 and the portion where the 1 st sealing portion 8a are formed are preferably not formed in the portion where the 2 nd sealing portion 8b is formed and are separated from the portion where the 2 nd sealing portion 8b is formed. Therefore, as shown in fig. 14, the printed layers 2b2, 2a2 are formed within a range shorter than the distance between the 2 nd seal portions 8b, 8b constituting the both ends of the film-folding portion 6. Thus, even when the formation positions of the printed layers 2b2 and 2a2 are shifted, the printed layers 2b2 and 2a2 can be prevented from being formed at the portion where the 2 nd seal portion 8b is formed, and therefore the peel strength of the seal portion of the corner portion formed by connecting the 1 st seal portion 8a and the 2 nd seal portion 8b can be maximized. Further, the printed layers 2b2 and 2a2 are separated from the portion where the 2 nd seal portion 8b is formed, and thus the peel strength of the end portion of the 1 st seal portion 8a on the 2 nd seal portion 8b side can be increased, and the area where the peel strength is high in the seal portion of the portion where the 1 st seal portion 8a and the 2 nd seal portion 8b are connected can be increased.

The film joining portion 6 shown in fig. 14 and 15 is formed by the following method.

First, ink is printed on a base material (for example, nylon) 2b1 for forming a film of the deep-side upper surface portion 2b, to form a 1 st printed layer 2b2. Next, ink is printed on the 1 st printing layer 2b2 to form a 2 nd printing layer 2b3. In this case, the 2 nd printed layer 2b3 uses a material having weaker adhesive strength than the 1 st printed layer 2b2. This can reduce the peel strength of the vapor discharge sealing portion 7. In the present embodiment, the material for forming the ink or the adhesive for forming the 1 st printed layer 2b2 and the 2 nd printed layer 2b3 is not particularly limited as long as the peel strength of the 2 nd printed layer 2b3 can be made weaker than the peel strength of the 1 st printed layer 2b2, and any ink can be used. For example, the material of the ink for forming the 1 st printing layer 2b2 and the material of the ink for forming the 2 nd printing layer 2b3 may be different from each other, and the 2 nd printing layer 2b3 may be weaker than the 1 st printing layer 2b2. In addition, the material of the ink for forming the 1 st printed layer 2b2 may be the same as the material of the ink for forming the 2 nd printed layer 2b3, and an adhesive for improving the adhesion may be added to the ink for forming the 1 st printed layer 2b2, so that the peel strength of the 1 st printed layer 2b2 is stronger than the peel strength of the 2 nd printed layer 2b3, and the peel strength of the 2 nd printed layer 2b3 may be relatively weaker than the 1 st printed layer 2b2. In addition, a release agent for reducing the adhesive force may be added to the ink for forming the 2 nd printed layer 2b3, so that the peel strength of the 2 nd printed layer 2b3 is weaker than the peel strength of the 1 st printed layer 2b2. In this way, by forming the printed layers 2b2 and 2b3 using materials having different peel strengths or inks to which the materials having different peel strengths are added, the peel strength of the 2 nd printed layer 2b3 can be made weaker than the peel strength of the 1 st printed layer 2b2.

Next, the substrate 2b1 having the two printed layers 2b2 and 2b3 formed thereon is dry laminated with a heat-sealable sheet (for example, low density polyethylene) 2b 4. Thereby, a film of the deep side upper surface portion 2b is formed.

In addition, ink is printed on a base material (for example, nylon) 2a1 for constituting a film of the opening side upper surface portion 2a, to form a1 st printed layer 2a2. Next, ink is printed on the 1 st printing layer 2a2 to form a2 nd printing layer 2a3. In this case, the peel strength of the 2 nd printed layer 2a3 is made weaker than the peel strength of the 1 st printed layer 2a2.

Next, the base material 2a1 having the two printed layers 2a2, 2a3 formed thereon is dry-laminated with a sheet (for example, low density polyethylene) 2a4 having heat sealability. Thereby, a film of the opening side upper surface portion 2a is formed.

Next, the film of the opening side upper surface portion 2a and the film of the depth side upper surface portion 2b are heat-sealed to form a film-closing portion 6 having a vapor-discharge sealing portion 7, a1 st sealing portion 8a, and a2 nd sealing portion 8b shown in fig. 14.

Thus, the film joining portion 6 shown in fig. 14 is obtained.

The film joining section 6 shown in fig. 14 is configured to: the 2 nd sealing portion 8b is not formed with a printed layer, and the layer thicknesses of the respective portions 7, 8a, 8b constituting the film-closing portion 6 satisfy the above condition (1). However, if the above condition (1) can be satisfied, a printed layer can be formed also on the 2 nd seal portion 8 b. In this case, the number of printed layers of the 1 st seal portion 8a and the vapor discharge seal portion 7 increases.

As shown in fig. 15, the film-folding portion 6 shown in fig. 14 is formed with a plurality of printed layers in a part of both the opening-side upper surface portion 2a and the depth-side upper surface portion 2b of the film-folding portion 6, and the peeling strength of each of the portions 7, 8a, and 8b shown in fig. 14 is made different by heat-sealing the portions 7, 8a, and 8b with different layer thicknesses. However, by forming a single printed layer having different peel strengths on the opening side upper surface portion 2a and the depth side upper surface portion 2b of the film-forming portion 6 and heat-sealing the layers, the peel strengths of the respective portions 7, 8a, 8b shown in fig. 14 can also be made different. For example, in the deep side upper surface portion 2b, a printed layer having a weak peel strength is formed at a portion where the vapor discharge seal portion 7 is formed, a printed layer having a strong peel strength is formed at a portion where the 1 st seal portion 8a is formed, and a printed layer is not formed at a portion where the 2 nd seal portion 8b is formed, and heat sealing is performed, whereby the peel strengths of the respective portions 7, 8a, 8b can be made different to satisfy the above-described condition (1). In this case, first, the ink having a high peel strength is printed only on the region of the portion where the 1 st seal portion 8a is formed, avoiding the region of the portion where the vapor discharge seal portion 7 is formed. Then, printing is performed only on the region where the vapor-discharge sealing portion 7 is formed with ink having a weak peel strength. Thus, even if one printed layer is formed, the peel strength of each of the portions 7, 8a, 8b shown in fig. 14 can be made different.

Operation and Effect of the packaging bag 300 of the present embodiment

As described above, the package 300 according to the present embodiment is configured to: the peel strength of each of the parts 7, 8a, 8b constituting the vapor discharge seal part 7, 1 st seal part 8a, 2 nd seal part 8b of the film combining part 6 satisfies the following conditions.

Accordingly, since the peel strength of the seal portion at the corner portion formed by connecting the 1 st seal portion 8a and the 2 nd seal portion 8b is highest, peeling from the seal portion at the corner portion can be prevented when the internal pressure of the package bag 300 increases and the package bag 300 expands. As a result, peeling occurs from the tip 70 side of the vapor discharge sealing portion 7 having the weakest peel strength, and the 1 st vapor discharge portion 101 can be easily formed, so that leakage of the content D in the package bag 300 from an undesired portion can be prevented.

In the film-joining section 6 of the present embodiment, the peel strength of the substantially V-shaped seal portion is relatively weak, and thus the occurrence of peeling from an undesired portion can be further suppressed.

(example 2 of embodiment 3)

Next, example 2 of embodiment 3 will be described.

As shown in fig. 16, the package bag 300 according to example 2 of embodiment 3 has a strong seal portion 8ab having the strongest peel strength formed at the joint portion between the 1 st seal portion 8a and the 2 nd seal portion 8 b. In this way, since the strong seal portion 8ab is provided at the portion where the 1 st seal portion 8a and the 2 nd seal portion 8b are connected, peeling from the strong seal portion 8ab can be avoided.

As a result, when the internal pressure of the packaging bag 300 increases and the packaging bag 300 is inflated, the packaging bag is not peeled off from the strong seal portion 8ab having the highest peel strength, but is peeled off from the tip 70 side of the vapor discharge seal portion 7 having the lowest peel strength, and is opened from the tip 70 of the vapor discharge seal portion 7 to a line connecting the two points, that is, the start points 71 and 71, which start to be formed into a substantially V-shape. The 1 st vapor discharge portion 101 for discharging the vapor and the like in the package 300 to the outside is formed by the opening region and the unsealed portion 9 (the polygonal unsealed portion 9a, the band-like unsealed portion 9 b). Accordingly, when the package bag 300 is inflated, the peeling from the undesired portion can be prevented in advance, but the peeling from the distal end 70 side of the exhaust steam sealing portion 7 can be prevented, and the 1 st steam exhaust portion 101 can be easily formed.

The above-described embodiment is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiment, and the present invention can be implemented in various modified embodiments without departing from the scope of the present invention.

Embodiment 4

The present embodiment relates to a container for a microwave bag having a vapor-exhausting mechanism.

The longitudinal microwave packaging bag having a substantially triangular cross section as described in patent document 5 is complicated and difficult to manufacture compared with a flat microwave bag having a sealed periphery. When used in a microwave oven, the microwave oven is put in a flat state because of the possibility of tilting during microwave heating. However, in such a longitudinally-placed microwave bag, when the bag is used in a flat state, the side surface (bottom) is substantially triangular, and when the bag is used in a microwave oven, the vapor-discharging portion that is opened by the pressure rise is low or located at a low position with respect to the entire height of the bag, and thus the stress generated by the pressure rise cannot be efficiently transmitted to the vapor-discharging portion, resulting in a reduction in the vapor-discharging performance.

Further, since such a microwave bag does not have a portion to be a handle, the entire packaging bag is heated by microwaves and then is heated to a high temperature, and there is a concern that the packaging bag may be burned or the like when taken out from the microwave oven. Further, since the packaging bag itself is unstable, it is possible to open the bag by vertically placing the bag after microwave heating and removing the upper portion, and it is difficult to directly eat the food in the bag from the packaging bag due to the risk of overturning or the like, and the advantage of vertical placement is not exhibited at all.

The present embodiment has been made in view of the above circumstances, and an object thereof is to provide a microwave bag container as described above: the microwave packaging bag can be easily manufactured without any risk of falling over due to an increase in internal pressure caused by vapor pressure, and can be heated in a vertically-placed state.

(example 1 of embodiment 4)

First, the container according to the present embodiment will be described with reference to fig. 17 to 19.

Fig. 17 is a perspective view of a microwave bag container 400 according to the present embodiment. The microwave bag container 400 according to the present embodiment is a substantially cylindrical container having a bottom surface 402 and side surfaces 403 and having an upper opening.

The microwave bag storage container 400 includes a side surface 403 which surrounds the bottom surface 402 and is substantially elliptical and which stands perpendicular to the bottom surface 402, as shown in fig. 19. The side surface 403 is a height at which a vapor-discharging seal portion for discharging vapor of a package bag described later cannot be covered. The intersection line between the bottom surface 402 and the side surface 403 has a fold line 405 connecting the bottom surface 402 and the side surface 403 to each other, and has an arc-shaped gap 406 at the center along the fold line 405 at the two ends. In this way, only a part of both ends of the bottom surface 402 and the side surface 403 are connected, and the bending can be easily performed without effort. The bottom surface 402 is in a bridge shape with both ends grounded and a central portion bulging upward. The bottom surface 402 is supported by at least the side surfaces 403 and is erected when the package bag is stored, and is flat and can be kept in a vertical state.

Next, a method of forming the microwave bag container 400 will be described. Fig. 18 is an expanded view of the microwave bag container 400 according to the present embodiment. The microwave bag container 400 is formed by bending a single piece of paper.

The bottom surface 402 located at the center when the microwave bag container 400 is unfolded is formed of a substantially elliptical shape having a straight line portion 411 which is grounded after assembly and a curved line portion 412 which is connected to the side surface 403 in an arc shape. The curved portion 412 has fold lines 405 connecting the bottom surface 402 and the side surfaces 403 at both ends thereof, and a slit corresponding to the gap 406 is formed along a substantially circular arc shape between the fold lines 405 at both ends so as to connect the fold lines 405 to each other. The side faces 403 are bent along the fold lines 405, whereby the side faces 403 stand substantially perpendicular with respect to the bottom face 402. When the side faces 403 are vertically erected, the bottom face 402 is bent into the bridge shape as described above, and thus the appearance and rigidity can be improved. Further, since the packaging bag having heat can be separated from the ground plane as much as possible, the heat insulation performance of the packaging bag can be improved, and the heat of the packaging bag can be suppressed from being transmitted to the installation site to bring the installation site to a high temperature state.

Further, the one side surface 403 has a convex portion 414 fitted in a slit 415 provided in the other side surface 403. The protruding portions 414 are provided at both ends of the side faces 403, respectively, and are formed so as not to protrude in the circumferential direction toward the bottom face 402 after assembly. The slit 415 of the other side surface 403 provided at a portion corresponding to the convex portion 414 is formed in an arc shape inclined with respect to the bottom surface 402 so that the convex portion 414 can be easily inserted. A fold line 413 is provided at a position adjacent to the convex portion 414 in a direction perpendicular to the bottom surface 402. This makes it possible to easily fit the projection 414 into the slit 415 even when the circular arc is assembled. The protruding portion 414 is inserted into the slit 415 from the outer side of the side surface 403 that is overlapped when the side surface 403 is raised, and the protruding portion 414 is fixed such that the tip protrudes inward of the side surface 403.

Fig. 19 is a plan view of a microwave bag container 400 according to the present embodiment. Holes 421 separating the bottom surface 402 from the side surfaces 403 are provided at both ends in the longitudinal direction of the bottom surface 402 having a substantially elliptical shape. The hole 421 is formed by a straight portion 411 of the bottom surface 402 and an arc-shaped portion of the side surface 403, and has a substantially semicircular shape. According to this configuration, the side surface 403 can be folded without difficulty, and the protruding portion 414 can be easily fitted into the slit 415.

Here, a package bag stored in the microwave bag storage container 400 according to the present embodiment will be described. Fig. 20 is a diagram showing a structural example of the package bag 31 according to the present embodiment, and is a perspective view of the package bag 31 in which the contents 40 are accommodated in the package bag 31 and sealed by heat-sealing the opening.

The package bag 31 of the present embodiment has sealing portions 34, 27, 28 formed by sealing between the peripheral edge portion of the film constituting the upper surface portion 32 and the peripheral edge portion of the film constituting the lower surface portion 33.

The packaging bag 31 of the present embodiment includes a vapor-discharge seal portion 35 formed by bending and projecting a substantially central portion of the seal portion 34 in a substantially V-shape toward the inside of the packaging bag 31, and an unsealed portion 36 formed adjacent to the vapor-discharge seal portion 35 and unsealed on the outside of the vapor-discharge seal portion 35, and when the packaging bag 31 expands due to an increase in the internal pressure of the packaging bag 31, stress concentrates on the vapor-discharge seal portion 35, and the packaging bag is peeled from the vapor-discharge seal portion 35 to open, and a vapor discharge portion for discharging vapor in the packaging bag 31 is formed by the open area and the unsealed portion 36.

The package bag 31 of the present embodiment is configured to have a lower surface portion 33, an upper surface portion 32a overlapping the upper side of the lower surface portion 33, and a lower upper surface portion 32b overlapping the lower side of the lower surface portion 33. The package bag 31 of the present embodiment includes an upper surface 32 formed by an upper surface 32a and a lower surface 32b.

In the package bag 31 of the present embodiment, the side seal portions 37 are partially formed by heat-sealing between the side edges of the lower surface portion 33 and the side edges of the upper surface portion 32. And, the three side edges of the lower surface portion 33 and the three side edges of the upper side upper surface portion 32a are heat-sealed to form a part of the side seal portion 37 and the end seal portion 38. The upper surface portion 32a and the lower surface portion 32b are folded back, overlapped, and heat-sealed to form a film-closing portion 39.

The film closing portion 39 has a steam discharge seal portion 35 protruding in a substantially V-shape curved toward the inside of the package bag 31 at the center in the longitudinal direction thereof, and strip-shaped seal portions 34 along the edges in the longitudinal direction and the edges in the width direction of the film closing portion 39 are provided on both sides of the steam discharge seal portion 35. The vapor discharge seal 35 and the band-shaped seal 34 are portions where the upper surface portion 32a and the lower surface portion 32b are overlapped and heat sealed, and the vapor discharge seal 35 is connected to the band-shaped seal 34.

The film-closing portion 39 has an unsealed portion 36 outside the vapor-discharge sealing portion 35. The unsealed portion 36 is an outer unsealed portion surrounded by the sealed portion 34 in which the upper side upper surface portion 32a and the lower side upper surface portion 32b are overlapped and heat sealed, and the vapor-discharge sealed portion 35. The vapor discharge seal portion 35 of the present embodiment is formed in a shape bent in a substantially V-shape toward the inside of the package bag 31 and protruding.

The vapor discharge seal portion 35 is formed by heat sealing, and has an inner curved shape protruding in a V shape toward the inside of the package bag 31, which is not adjacent to the unsealed portion 36, and an outer curved shape toward the outside of the package bag 31, which is adjacent to the unsealed portion 36, and the distal end side of the vapor discharge seal portion 35 is narrow. Therefore, when the internal pressure of the packaging bag 31 increases and the packaging bag 31 expands, only the tip side of the vapor-discharging seal portion 35 peels off and opens, and the vapor-discharging portion for discharging the water vapor and the like in the packaging bag 31 is formed by the open area and the unsealed portion 36. The steam and the like in the package bag 31 are discharged to the outside from the steam discharge portion. Accordingly, even if the internal pressure of the package bag 31 increases and the package bag 31 expands, the steam and the like in the package bag 31 are discharged from the steam discharge portion to the outside, and thus the package bag 31 can be prevented from being broken.

Fig. 21 is a diagram showing an embodiment of a microwave bag container 400 according to an embodiment of the present invention. As shown in fig. 21, the microwave bag container 400 and the packaging bag 31 are integrally assembled such that the vapor-discharge sealing portion 35 of the packaging bag 31 is exposed from the opening 404 of the microwave bag container 400. Fig. 22 shows a state where the microwave bag container 400 and the packaging bag 31 are heated and inflated by a microwave oven, fig. 22 (a) shows a perspective view of the microwave bag container 400 and the packaging bag 31, and fig. 22 (b) shows a side view of the microwave bag container 400 and the packaging bag 31.

As shown in fig. 21, the packaging bag 31 is stored in the opening 404 of the microwave bag storage container 400 such that the bottom surface 402 of the microwave bag storage container 400 is downward and the opening 404 of the side surface 403 is upward, whereby the packaging bag 31 can be raised. The microwave bag container 400 and the packaging bag 31 can be bonded together by a known adhesive or the like. The vapor discharge sealing portion 35 of the packaging bag 31 is located above the opening 404 of the microwave bag container 400, and therefore the vapor discharge sealing portion 35 is not blocked by the microwave bag container 400.

When the sealed package bag 31 is heated by a microwave oven, steam or the like is generated in the package bag 31, and the package bag 31 is inflated at a high temperature and a high pressure. Then, as shown in fig. 22, the horizontal cross section of the main body portion of the package bag 31 including the lower surface portion 33 and the upper surface portion 32 expands into an elliptical shape, and the space defined by the vapor-discharge seal portion 35 and the band-shaped seal portion 34 of the film-closing portion 39 expands. Thereby, the force is intensively applied to the portion constituting the front end of the vapor discharge sealing portion 35 of the film combining portion 39, the heat-sealed portion peels off from the front end of the vapor discharge sealing portion 35, the front end of the vapor discharge sealing portion 35 opens, and the vapor discharge portion for discharging the water vapor and the like in the package bag 31 is formed by the open area and the unsealed portion 36. This allows the steam and the like generated in the package bag 31 to be discharged from the steam discharge portion to the outside.

In the present embodiment, the contents 40 are heated in such a state that at least the vapor-exhausting seal part 35 of the packaging bag 31 is exposed from the microwave bag container 400, so that the packaging bag 31 and the microwave bag container 400 can be safely taken out from the microwave oven without waiting for the temperature of the contents to decrease, and the contents can be directly consumed while the packaging bag 31 and the microwave bag container 400 are kept in the standing state by cutting the bag from the cut part 41 formed in the upper part of the packaging bag 31.

Further, in the packaging bag 31 of the present embodiment, the vapor discharge seal portion 35 for forming the vapor discharge portion is provided at the film closing portion 39 above the upper surface level of the content 40 in the packaging bag 31, so that the content 40 in the packaging bag 31 can be prevented from being blown out, and the content 40 in the packaging bag 31 can be prevented from leaking.

The microwave bag container 400 according to the present embodiment is not limited to this embodiment, and at least the vapor-evacuation seal portion 35 of the packaging bag 31 may be exposed from the microwave bag container 400, and for example, when the height of the side surface of the microwave bag container 400 is equal to or higher than the height of the packaging bag 31, the microwave bag container 400 may be appropriately shaped such that a portion of the corresponding portion is cut off above the vapor-evacuation seal portion 35 to enable vapor evacuation.

(example 2 of embodiment 4)

The microwave bag storage container 51 according to the present embodiment can be heated by a microwave oven in a flat state after the packaging bag 31 is stored, and can be immediately taken out from the microwave oven, and can be vertically placed to facilitate the taking out of the contents, thereby improving convenience. Fig. 23 (a) is a perspective view showing a folded state of the microwave bag storage container 51 according to the present embodiment, and fig. 23 (b) is a cross-sectional view taken along the arrow A-A in fig. 23 (a).

As shown in fig. 23, the microwave bag container 51 is constituted by a container main body 52 and a bottom member 53, wherein the container main body 52 can be unfolded into a tubular shape by pressing side edges of both sides in the direction of each other in a folded state, the bottom member 53 is provided at a lower end portion of the container main body 52, and the bottom member 53 is folded and unfolded in association with the folding and unfolding of the container main body 52.

As shown in fig. 24 (a), the container main body 52 is formed of a sheet material such as a cardboard or a synthetic resin sheet, and has two side walls 54, wherein the two side walls 54 are formed of one sheet material so as to be connected to each other at one side edge, the two side walls 54 are folded in half at a folding line 55 and overlapped, and the other side edges are bonded and fixed to each other by an adhesive sheet 56, so that the container main body can be unfolded into a tubular shape by pressing the two side edges in a flat folded state.

The lower end edges of both side walls 54 of the container body 52 are formed as horizontal straight edges which are substantially perpendicular to the upper and lower axes of the container body 52. A strip-shaped connecting piece 57 connected to the bottom member 53 in a downward extending manner is provided to protrude from the center of the lower end edges of the side walls 54 in the width direction.

As shown in fig. 24 (b), the bottom member 53 is made of the same sheet material as the container main body 52, a pair of bottom walls 62 connected to each other with a linear fold line 61 interposed therebetween are formed so as to be capable of being folded in half from two, the outer edges of the two bottom walls 62 opposite to the linear fold line 61 are plate-shaped with protruding edges in a circular arc shape, the lengths of the two bottom walls 62 in the direction of the fold line 61 are set to be a length capable of being accommodated between both side edges of the container main body 52 in a folded state, the fold line 61 side is positioned inside the container main body 52 in a folded state, a part of the bottom walls 62 protrudes outward from the lower edge of the side wall 54, and the bottom member 53 is accommodated in the container main body 52 in this arrangement.

The bottom wall 62 of the bottom member 53 is provided with a center long hole 63 in the fold line 61, and an outer long hole 64 is provided in parallel with the fold line 61 at a position spaced apart from the fold line 61 by an equal distance, and a band-shaped connecting piece 57 connected to the lower edge of each side wall 54 of the container main body 52 is passed through the outer long hole 64 from above in the unfolded state of the bottom member 53, and is bent at the lower surface of the bottom wall 62, and the front end portion of the connecting piece 57 is bent so as to pass through the center long hole 63 from below, thereby connecting the side wall 54 and the bottom wall 62.

The microwave bag storage container 51 of the present embodiment has the above-described structure, and when the container body 52 is folded so that both side walls 54 overlap each other as shown in fig. 23 (a) and 23 (b), the bottom member 53 is sandwiched between the lower end portions of the side walls 54 in a folded state, and the entire container body is flat. In this state, the connecting pieces 57 provided on both side walls 54 are folded in half by the bottom member 53 and are folded inward.

Fig. 25 is a perspective view showing that the microwave bag container 51 and the packaging bag 31 are integrally laid. The microwave bag container 51 and the packaging bag 31 are stored such that at least the vapor-discharge seal portion of the packaging bag 31 is exposed from the microwave bag container 51. The stored packaging bag 31 may be fixed to the microwave bag storage container 51 using a known adhesive or the like.

The microwave bag container 51 according to the present embodiment is configured such that, for example, when the contents 40 are heated by a microwave oven, the packaging bag 31 is placed in the microwave oven so as to be kept flat, and therefore, the packaging bag can be stably heated in microwaves without falling over or the like during microwave heating. Further, even when taken out from the microwave oven, the microwave bag container 51 and the packaging bag 31 can be taken out without fear of being burned or the like by holding the microwave bag container 51.

Further, with respect to the microwave bag container 51 and the packaging bag 31 taken out from the microwave oven, the side edges of the microwave bag container 51 can be pressed, and as shown in fig. 26, the two bottom walls 62 of the bottom member 53 can be unfolded by touching, so that the vertical placement can be easily performed. Thereafter, the upper portion of the package bag 31 is cut off, so that the contents 40 can be easily taken out, and convenience in eating can be improved.

In the present embodiment, after the microwave bag container 51 and the packaging bag 31 are heated in a flat state, the microwave bag container 51 and the packaging bag 31 can be easily placed vertically, and thus the contents 40 can be eaten immediately after heating without giving a fear of scalding or the like.

The above-described embodiment is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiment, and the present invention can be implemented in various modified embodiments without departing from the gist of the present invention.

The techniques described in embodiments 1 to 4 can be appropriately combined. For example, in embodiment 2 and embodiment 3, the seal width may be tapered in the same manner as that in embodiment 1, and in embodiment 3, a polygonal unsealed portion as in embodiment 1 and embodiment 2 may be used.

Description of the reference numerals

100. 200, 300, packaging bags; 6. a film-closing part; 7. a vapor discharge sealing part; 101. a 1 st vapor discharge unit; 102. a2 nd vapor discharge unit; 2a2, 1 st printing layer; 2a3, the 2 nd printing layer; 400. a container; 31. packaging bags; 35. and a vapor discharge sealing part.

Claims

1. A packaging bag having a vapor-exhausting seal portion, characterized in that,

the packaging bag is provided with a strip-shaped 1 st sealing part and a strip-shaped 2 nd sealing part, wherein the 1 st sealing part is connected with the vapor discharge sealing part, the 2 nd sealing part is intersected with the 1 st sealing part,

the packaging bag is formed by heat-sealing a film having a 1 st printed layer and a2 nd printed layer, the 1 st printed layer being printed on a 1 st region including at least a portion where the vapor-exhausting seal portion and the 1 st seal portion are formed, the 2 nd printed layer being printed on a2 nd region including at least a portion where the vapor-exhausting seal portion is formed,

when the internal pressure increases, interlayer peeling occurs in the 2 nd printed layer to form a 1 st vapor discharge portion,

the 1 st print layer and the 2 nd print layer are laminated,

the peel strength of the vapor-discharge seal portion, the peel strength of the 1 st seal portion, and the peel strength of the 2 nd seal portion satisfy the following relationship:

The peel strength of the vapor discharge seal portion is smaller than the peel strength of the 1 st seal portion and smaller than the peel strength of the 2 nd seal portion.

2. The package of claim 1 wherein,

the 2 nd region does not include the 1 st seal and the 2 nd seal.

3. The package of claim 2 wherein,

the peel strength of the 2 nd printed layer is weaker than the peel strength of the 1 st printed layer.

4. The package according to any one of claim 1 to 3, wherein,

the 1 st region does not include the 2 nd seal.