CN103998350A

CN103998350A - Packaging bag

Info

Publication number: CN103998350A
Application number: CN201280061988.1A
Authority: CN
Inventors: 原正人; 槌谷尚
Original assignee: Nai Fuke Co Ltd By Shares; Kyoraku Co Ltd
Current assignee: Nai Fuke Co Ltd By Shares; Kyoraku Co Ltd; Nafuko Co Ltd
Priority date: 2011-12-28
Filing date: 2012-12-27
Publication date: 2014-08-20
Anticipated expiration: 2032-12-27
Also published as: PH12014501291A1; HK1200424A1; KR102018105B1; CN110834822B; SG11201403141RA; PH12018501421A1; CN109229938B; MY183399A; JP2013151317A; PH12014501291B1; SG10202109167QA; CN109229938A; KR20140091050A; CN110834822A; KR101892377B1; CN115504086B; KR20180093125A; CN115504086A; JP6026747B2; CN103998350B

Abstract

A packaging bag with a steam-venting-related improvement is provided. Said packaging bag has a seal part (8a) formed where an edge of a film that constitutes a top surface and an edge of a film that constitutes a bottom surface are sealed together. This packaging bag is characterized by having a steam-venting seal part (7) that comprises part of the aforementioned seal part (8a) formed so as to protrude inwards with a curved shape. This packaging bag is further characterized in that: the width of the seal, at least in the direction inwards from the abovementioned seal part (8a), is narrower at the tip of the steam-venting seal part (7) than in the other sections of the steam-venting seal part (7); and when the packaging bag inflates and the steam-venting seal part (7) comes apart, the aforementioned other sections thereof remain and form edge parts (7a) protruding inwards from the seal part (8a).

Description

Packaging bag

Technical field

The present invention relates to a kind of such packaging bag: in the time utilizing micro-wave oven etc. to heat being filled with the packaging bag of content of cooking food being formed by liquid, solid or their compound etc., packaging bag opening under the effect of vapour pressure, thus can make to discharge to outside at the inner aqueous vapor producing of this packaging bag.

Background technology

In the time utilizing micro-wave oven etc. to heat being filled with the packaging bag of content of cooking food etc., along with this heating, produce the gases such as aqueous vapor from content, thereby make the pressure rise of packaging bag inside, may make packaging bag break and content is dispersed.

Therefore, existence has the packaging bag (for example,, with reference to patent documentation 1: TOHKEMY 2002-80072 communique, patent documentation 2: TOHKEMY 2005-82172 communique, patent documentation 3: TOHKEMY 2003-182779 communique, patent documentation 4: TOHKEMY 2005-320023 communique, patent documentation 5: No. 3665795 communique of Japanese Patent) of the structure of the pressure rise for avoiding packaging bag inside.

In above-mentioned patent documentation 1, be provided with heat seal in the time utilizing micro-wave oven to carry out cooking, that make the concentrated curved shape of stress when at pressure rise (row vapor seal portion), by making this row's vapor seal portion take the lead in peeling off to make steam to be discharged to outside from here, prevent that packaging bag from breaking.Row vapor seal portion is by namely inside bend shape and the curved shape part that namely regional seal between outside curve shape gets up by packaging bag outside of the curved shape by packaging bag inner side, and, be to be the outstanding part of bending towards the interior side direction of packaging bag.

For the packaging bag of above-mentioned patent documentation 1, vapor seal portion of the row of making takes the lead in peeling off, and steam is discharged to outside, thereby can prevent that packaging bag from breaking.But the disclosed packaging bag of patent documentation 1 is not provided with for reporting the parts of opening, therefore need to confirm packaging bag opening by visual inspection.Therefore, for example,, while utilizing micro-wave oven to carry out cooking to the content in packaging bag, in the case of leaving micro-wave oven or carrying out other thing etc. and do not see that packaging bag is opening, after packaging bag opening, content is lost moisture by superheated, and the taste of food is reduced.In addition, according to the difference of the kind of content, also there is the content that can utilize by heat certain hour after packaging bag opening the taste of the effect improved food of stewing system, but do not seeing that packaging bag opening in the situation that, cannot hold the suitable time stewing processed.

Therefore, existence can utilize sound to report the packaging bag packaging bag of opening.

In above-mentioned patent documentation 2, the vibrating reed that unsealing portion has airbag and this unsealing portion self enforcement cutting etc. is processed, because the steam accumulating in airbag can make vibrating reed vibrate, thereby sounds.Thus, in above-mentioned patent documentation 2, by the packing self that form packaging bag are processed, can utilize sound to report packaging bag opening.

In above-mentioned patent documentation 3, in the sealing that surrounds surrounding, be provided with breach or the joint-cutting as the saturating portion of easy steaming, utilize the sealing decline of sealing and easily steam saturating portion steam is shed to outside.

In addition, in above-mentioned patent documentation 1,4, be provided with heat seal (row vapor seal portion) in the time utilizing micro-wave oven to carry out cooking, that make the roughly V font that stress concentrates when at pressure rise, by making this row's vapor seal portion take the lead in peeling off, steam discharged from here to outside.

In addition, the disclosed microwave packaging bag of patent documentation 5 be a kind ofly consider filling when content, when display goods etc. user convenience and in packaging bag bottom, accessory (ガゼット) is set so that this bottom can erect, section be general triangular shape vertical put type microwave with bag.

Prior art document

Patent documentation

Patent documentation 1: TOHKEMY 2002-80072 communique

Patent documentation 2: TOHKEMY 2005-82172 communique

Patent documentation 3: TOHKEMY 2003-182779 communique

Patent documentation 4: TOHKEMY 2005-320023 communique

Patent documentation 5: No. 3665795 communique of Japanese Patent

Summary of the invention

the problem that invention will solve

For the packaging bag with row's structure of steam as described above, popularized widely due to its convenience, therefore can further be improved by strong expectation.

Therefore, the object of the present invention is to provide a kind of packaging bag of having carried out about the improvement of row's steam.

for the scheme of dealing with problems

In order to reach this object, the present invention has following feature.

Packaging bag of the present invention is characterised in that, this packaging bag has row vapor seal portion, this row's vapor seal portion is that the part by making the sealing that is pasted with film is also given prominence to and formed to the interior side direction bending of packaging bag, the peel strength of at least a portion of above-mentioned row's vapor seal portion than the peel strength of the part except an above-mentioned part of above-mentioned row's vapor seal portion a little less than, while peeling off under the effect of vapour pressure, the part except an above-mentioned part of above-mentioned row's vapor seal portion is residual and form edge part, sounds along with row's steam.

the effect of invention

Adopt the present invention, a kind of packaging bag of having carried out about the improvement of row's steam can be provided.

Brief description of the drawings

Fig. 1 is the figure that represents the structure example of the packaging bag 100 of the 1st embodiment, (a) being the block diagram of the packaging bag 100 before airtight opening 4, is (b) in packaging bag 100, to be accommodated with content D and to seal opening 4 and the block diagram of airtight packaging bag 100.

Fig. 2 is the figure that represents the structure example of arranging vapor seal portion 7 and unsealing portion 9 (9a, 9b).

Fig. 3 is the figure of the function of the packaging bag 100 for present embodiment is described, (a) be the lateral plan of the packaging bag 100 of the state that expanded by microwave-oven-heating of the packaging bag 100 of (b) of presentation graphs 1, (b) being while being illustrated in high compression swelling, to arrange front end 70 openings of vapor seal portion 7 and the figure that forms the state of steam discharge portion, is (c) block diagram of the packaging bag 100 of the state that represents that packaging bag 100 expanded by microwave-oven-heating.

Fig. 4 is the figure for the example of sounding in the time forming steam discharge portion is described.

Fig. 5 is the figure for steam discharge portion is described.

Fig. 6 is the figure that represents the structure example of the packaging bag 100 of present embodiment.

Fig. 7 is the figure that represents the structure example of the packaging bag 100 of present embodiment.

Fig. 8 is for illustrating the figure of the example of sounding in the structure example shown in Fig. 7 (c).

Fig. 9 is the figure that represents the structure example of the packaging bag of embodiment 1～5, represents the structure example of row vapor seal portion before and after peeling off.

Figure 10 is the figure that represents the structure example of the packaging bag of comparative example 1～2, is the figure that represents to arrange the structure example of vapor seal portion before and after peeling off.

Figure 11 is the figure that represents the structure example of the packaging bag 200 of the 2nd embodiment and the packaging bag 300 of the 3rd embodiment, (a) being the block diagram of the packaging bag 200 (300) before airtight opening 4, is (b) in packaging bag 200 (300), to be accommodated with content D and to seal opening 4 and the block diagram of airtight packaging bag 200 (300).

Figure 12 is the figure that represents the structure example of arranging vapor seal portion 7 and unsealing portion 9 (the polygon unsealing 9a of portion, the banded unsealing 9b of portion).

Figure 13 is the figure of the function of the packaging bag 200 for present embodiment is described, (a) being the lateral plan of the packaging bag 200 of the state that expanded by microwave-oven-heating of the packaging bag 200 of (b) of presentation graphs 1, is (b) while being illustrated in high compression swelling, to arrange front end 70 openings of vapor seal portion 7 and the figure that forms the state of the 1st steam discharge portion 101.

Figure 14 represents that the film of the 3rd embodiment closes the figure of a structure example of portion 6.

Figure 15 is the figure that represents to form the layer structure example of each portion 7 that the film shown in Figure 14 closes portion 6,8a, 8b, (a) the layer structure example of the 2nd sealing 8b shown in expression Figure 14, (b) the layer structure example of the 1st sealing 8a shown in expression Figure 14, (c) is the figure that represents the layer structure example of the row's vapor seal portion 7 shown in Figure 14.

Figure 16 is the figure that represents the structure example of the packaging bag 300 of present embodiment.

Figure 17 is the block diagram of the container of the 4th embodiment.

Figure 18 is the unrolling of container figure of embodiment.

Figure 19 is the birds-eye view of the container of present embodiment.

Figure 20 is the block diagram of the packaging bag of present embodiment.

Figure 21 represents the container of present embodiment and the figure that packaging bag is integrated.

Figure 22 is the figure of the state that represents that container and packaging bag expanded by microwave-oven-heating.

Figure 23 is the figure that represents the Foldable container of present embodiment.

Figure 24 is the expansion drawing that represents the Foldable container of present embodiment.

Figure 25 represents block diagram that container and packaging bag are kept flat.

Figure 26 represents container and the vertical front view of putting of packaging bag.

Detailed description of the invention

The 1st embodiment

Present embodiment is the improvement about the packaging bag of sounding in the time that steam is discharged.

In the illustrated above-mentioned patent documentation 2 of conventional art, structure for such: the circumference of vibrating reed is cut by Punching Technology etc., vibrating reed can effectively vibrate due to steam, and the circumference of steam self-vibration moving plate is discharged to outside, and this need to self process unsealing portion.

Therefore, for the packaging bag of above-mentioned patent documentation 2, need to be the packing that form packaging bag are sealed after forming unsealing portion, this unsealing portion is implemented to Punching Technology and form vibrating reed, or in advance the unsealing portion of packing is implemented to Punching Technology and form vibrating reed, for the mechanism that is configured for sounding, other processing that need to be except the operation that packing are sealed.

Present embodiment is In view of the foregoing made, and its object is to provide a kind of packaging bag that only utilizes the shape of the sealing that film sealing is formed just can sound.

The summary > of the packaging bag 100 of < present embodiment

First, with reference to Fig. 1～Fig. 4, the summary of the packaging bag 100 to present embodiment describes.

As shown in Figure 1, the packaging bag 100 of present embodiment has the circumference of the film that will form upper surface part 2 (2a, 2b) and forms sealing between the circumference of film of lower surface portion 1 and the sealing 3,5,10,8a, the 8b that form.

The packaging bag 100 of present embodiment has: row vapor seal portion 7, and it is that substantial middle portion by making sealing 8a is roughly V word sigmoid outstanding formation towards the interior side direction of packaging bag 100; And unsealing portion 9 (9a, 9b), it is adjacent with row vapor seal portion 7, be formed on the outside of row vapor seal portion 7 in unencapsulated mode, rise and when packaging bag 100 is expanded at the internal pressure of packaging bag 100, row vapor seal portion 7 peels off and opening, is formed for discharging the steam discharge portion of the steam in packaging bag 100 by the region of this opening and unsealing portion 9 (9a, 9b).

The sealing shape that the self sealss portion 8a of row's vapor seal portion 7 of present embodiment during by V word roughly gives prominence to the inside forms, and, by being that starting point 71,71 line connected to each other forms by the part of packaging bag 100 interior side directions than 2 that start to become curved shape place.Row's vapor seal portion 7 of present embodiment is characterised in that, at 2 that start to become curved shape place be between starting point 71,71 at least, the sealed width of leading section is different with the sealed width of other parts, front end 70 sides of row vapor seal portion 7 are narrower, expand and as shown in Fig. 3 (b), arrange vapor seal portion 7 while peeling off in packaging bag 100, other parts left behind, and these other parts that left behind form the 8a of the self sealss portion edge part 7a that direction is outstanding to the inside.

The packaging bag 100 of present embodiment is formed with the 8a of the self sealss portion edge part 7a that direction is outstanding to the inside, and therefore the gas such as the aqueous vapor in packaging bag 100 is when from steam discharge portion, discharge in the outside to packaging bag 100, and a part of gas and edge part 7a bump.Because gas and edge part 7a bump, the mobile of gas changes, and forms whirlpool, thereby sounds.As a result, only utilize the shape of row's vapor seal portion 7 that film sealing is formed just can sound.Below, explain the packaging bag 100 of present embodiment with reference to accompanying drawing.

(example 1 of the 1st embodiment)

The structure example > of < packaging bag 100

First, with reference to Fig. 1～Fig. 3, the structure example of the packaging bag 100 to present embodiment describes.Fig. 1 is the figure that represents the structure example of the packaging bag 100 of present embodiment, (a) of Fig. 1 is the block diagram of the packaging bag 100 before airtight opening 4, and (b) of Fig. 1 is accommodated with content D and seals opening 4 and the block diagram of airtight packaging bag 100 in packaging bag 100.Fig. 2 is the figure that represents to be located at the film shown in Fig. 1 and close row's vapor seal portion 7 of portion 6 and the structure example of unsealing portion 9 (9a, 9b).The structure example of the packaging bag 100 of the state that the packaging bag 100 shown in (b) of Fig. 3 presentation graphs 1 is expanded by microwave-oven-heating, (a) of Fig. 3 is the lateral plan of packaging bag 100, (b) of Fig. 3 represents to arrange front end 70 openings of vapor seal portion 7 and the figure that forms the state of steam discharge portion, and (c) of Fig. 3 is the block diagram of packaging bag 100.

As shown in Figure 1, the packaging bag 100 of present embodiment is configured to and has: lower surface portion 1; Open side upper surface part 2a, the opening 4 of itself and lower surface portion 1 stresses to fold; And depth side upper surface part 2b, the depth of itself and lower surface portion 1 stresses to fold.In the packaging bag 100 of present embodiment, utilize open side upper surface part 2a and depth side upper surface part 2b to form upper surface part 2.

As the film for forming lower surface portion 1, open side upper surface part 2a, depth side upper surface part 2b, as long as the film that can be welded together each other at heat-sealing caudacoria, can apply all films, for example, can apply the plastic film with heat sealability that common packaging bag is used.As the material for forming plastic film, multilayer film that for example can list the monofilm that formed by the thermoplastic base resin with heat sealability, sheet material class, is laminated by thermoplastic base resin and other the thermoplastic base resin etc. with heat sealability etc.

As the good material of heat sealability, for example can list known Low Density Polyethylene, linear low density polyethylene (LLDPE), medium density polyethylene, high density polyethylene (HDPE), polypropylene, propylene-ethylene copolymers, vinyl-vinyl acetate copolymer, utilize vinyl unsaturated carboxylic acid or its acid anhydride graft modification the olefine kind resin such as olefin resin, amilan and/or copolyamide resin, alkide resin and/or conjugated polyester resin, the polycarbonate resin etc. that fusing point is lower and/or softening point is lower.

In addition, can use various barrier films for other stacked plastic material.Wherein, in the time using the stacked stacked film of other plastic material and above-mentioned thermoplastic base resin, preferably taking the good thermoplastic resin of the heat sealabilities such as the lower resin of fusing point each other as the mode of inside face seals.

In the packaging bag 100 of present embodiment, will be between the both side edges of lower surface portion 1 and the both side edges of open side upper surface part 2a heat-sealing get up and form the part of side seals 3.And, will be between three lateral margins of lower surface portion 1 and three lateral margins of depth side upper surface part 2b heat-sealing get up and form a part and the end seal portion 5 of side seals 3.And, by open side upper surface part 2a and depth side upper surface part 2b turn back, overlapping and seal and form film and close portion 6.

Film closes the central portion of portion 6 on its length direction to be had towards the interior side direction of packaging bag 100 and is row's vapor seal portion 7 of roughly giving prominence to V word sigmoid, and has the banded 8a of end seal portion, the 8a at the edge on the length direction that closes portion 6 along film in the both sides of this row's vapor seal portion 7.And, there is the banded side seals 8b, the 8b that close the edge on the Width of portion 6 along film.Row vapor seal portion 7, the banded 8a of end seal portion and banded side seals 8b are the part that open side upper surface part 2a and depth side upper surface part 2b are sealed overlappingly, and row vapor seal portion 7, the banded 8a of end seal portion and banded side seals 8b link together.In the present embodiment, the banded 8a of end seal portion and banded side seals 8b being referred to as to band seal 8a, 8b describes.

Film closes portion 6 and has unsealing portion 9 in the outside of row vapor seal portion 7.The serve as reasons part not being heat-sealed in the outside that the 8a of end seal portion, 8a, once again sealing 8b and row vapor seal portion 7 that open side upper surface part 2a and depth side upper surface part 2b are sealed overlappingly surround of unsealing portion 9.Unsealing portion 9 is configured to has the polygon unsealing 9a of portion forming along row vapor seal portion 7 and the banded unsealing 9b of portion linking with this polygon unsealing 9a of portion.The banded unsealing 9b of portion forms along the banded 8a of end seal portion.Wherein, there is no need to form the banded unsealing 9b of portion.

As shown in Figure 2, row vapor seal portion 7 is for to be the shape of roughly giving prominence to towards the interior side direction of packaging bag 100 V oxbow, and 2 of V font roughly of starting to become of row vapor seal portion 7 are starting point 71,71 and the banded 8a of end seal portion link.The front end 70 of roughly V font of row vapor seal portion 7 is positioned at the position by bag side direction than starting point 71,71 line connected to each other.Row's vapor seal portion 7 of present embodiment forms by the part of packaging bag 100 interior side directions by being starting point 71,71 line connected to each other than 2.

In addition, the polygon unsealing 9a of portion that forms unsealing portion 9 utilizes and divides by following part the region forming and form, and this part is: along the outstanding shape line 9a1 of the roughly V-shape of row vapor seal portion 7, two tie line 9a2,9a2 linking with the end 91,91 of this outstanding shape line 9a1 and link with the banded unsealing 9b of portion and with the bottom line 9a3 of end 92,92 links of these two tie line 9a2,9a2.It is the position of end 91,91 line connected to each other by bag side direction that the front end 90 of the outstanding shape line 9a1 of the polygon unsealing 9a of portion is positioned at than initial 2 of this outstanding shape line 9a1.

As shown in Figure 2, row's vapor seal portion 7 of present embodiment forms by heat-sealing, have with unsealing portion 9 is non-conterminous and be the outstanding inside bend shape 7a1 of V word and adjacent with the unsealing portion 9 outside curve shape (suitable with outstanding shape line 9a1, tie line 9a2) by packaging bag 100 outsides by packaging bag 100 inner sides, this row's vapor seal portion 7 is at least that the sealed width of leading section between starting point 71,71 is different with the sealed width of other parts at 2 that start to become V-shape, and front end 70 sides of row vapor seal portion 7 are narrower.Therefore, rise and packaging bag 100 while expanding at the internal pressure of packaging bag 100, only arrange front end 70 sides of vapor seal portion 7 and peel off and opening, be formed for discharging the steam discharge portion of aqueous vapor in packaging bag 100 etc. by the region of this opening and unsealing portion 9 (the particularly 9a of polygon unsealing portion).And the aqueous vapors in packaging bag 100 etc. certainly this steam discharge portion are discharged to outside.Thus, even if the internal pressure of packaging bag 100 rises, packaging bag 100 is expanded, and discharges from steam discharge portion due to the aqueous vapor in packaging bag 100 etc. to outside, therefore also can prevent that packaging bag 100 from breaking.

As shown in Fig. 3 (b), steam discharge portion by the polygon unsealing 9a of portion and the front end 70 of certainly arranging vapor seal portion 7 to the region of opening till the line connected to each other end 91,91 of outstanding shape line 9a1 is formed.

Film closes portion 6 and is located at upper surface part 2, and the row's vapor seal portion 7 that therefore forms steam discharge portion is positioned at than the top side's of upper surface of the content D of packaging bag 100 position.Wherein, preferred film closes portion 6 and is located at ratio central authorities in package length direction position in the outer part.Thus, press while liter and easily make pressure concentration by row vapor seal portion 7 in making because of steam, Kaifeng property is good.In addition, near the film of side seals 3,3 closes portion's 6 sides, be preferably provided with the recess 11,11 for packaging bag 100 is broken a seal after heating, the pressurization cooking closing portion 6 position in the inner part than film.For the packaging bag 100 of present embodiment, from recess 11,11, packaging bag 100 is broken a seal, thereby from the interior taking-up content of packaging bag 100 D.

In the time utilizing micro-wave oven to heat the packaging bag 100 of the air-tight state shown in Fig. 1 (b), at interior generation aqueous vapor of packaging bag 100 etc., and become the state of high temperature, high pressure, packaging bag 100 expands.So, as shown in Fig. 3 (a), the vertical section of the base portion being made up of lower surface portion 1 and upper surface part 2 of packaging bag 100 expands becomes circle, and is divided the space forming and expanded by row's vapor seal portion 7, the banded 8a of end seal portion, banded side seals 8b that film closes portion 6.Thus, power is concentrated to act on and is formed film and close the part of the front end 70 of row's vapor seal portion 7 of portion 6, as shown in Fig. 3 (b), the part of heat-sealing is peeled off from the front end 70 of row vapor seal portion 7, to by the region opening till the line connected to each other end 91,91 of outstanding shape line 9a1, be formed for discharging the steam discharge portion of aqueous vapor in packaging bag 100 etc. from the front end 70 of row vapor seal portion 7 by the region of this opening and unsealing portion 9 (the polygon unsealing 9a of portion, the banded unsealing 9b of portion).Thus, can discharge from steam discharge portion at the aqueous vapor of packaging bag 100 interior generations to outside etc.And, when the aqueous vapor in packaging bag 100 etc. is discharged to outside, send " Pi " such sound, can report packaging bag 100 opening by sound thus.Result, in the time utilizing micro-wave oven to heat, pressurize the cooking to packaging bag 100, in the situation that leaving micro-wave oven or carry out other things etc., also can hold packaging bag 100 opening by sound, therefore can prevent in advance and not see packaging bag 100 situation of opening.

In the time that the packaging bag 100 of present embodiment is expanded by microwave-oven-heating, as shown in Figure 4, from the front end 70 of row vapor seal portion 7 to by the region opening till the line connected to each other end 91,91 of outstanding shape line 9a1, from 91,91 positions connected to each other, end till to start to become 2 of V font be that the region of starting point 71,71 position connected to each other is still formed with sealing, is formed with from the banded 8a of end seal portion to side-prominent edge part 7a in bag.; for the packaging bag 100 of present embodiment; in the time that row vapor seal portion 7 peels off; form other parts except leading section of row vapor seal portion 7 and the banded 8a of end seal portion and link and left behind, these other parts that left behind form from the banded 8a of the end seal portion edge part 7a that direction is outstanding to the inside.And, be formed with each other the vapor exhaust outlet of tubular at edge part 7a.

The packaging bag 100 of present embodiment is formed with from the banded 8a of the end seal portion edge part 7a that direction is outstanding to the inside, therefore the steam in packaging bag 100 is in the time that the vapor exhaust outlet of tubular is discharged to outside (outside of packaging bag 100), and a part of steam and edge part 7a bump.Steam and edge part 7a bump, thereby the mobile of steam changes, and change to the pressure cycle of the inner side of the vapor exhaust outlet of tubular, and the up-and-down movement of this continuous pressure forms whirlpool, because this whirlpool vibrates, thereby sounds.That is, as shown in Figure 4, steam and edge part 7a bump, thereby the mobile of steam changes, under the mobile effect changing of this steam and form whirlpool, because this whirlpool vibrates, thereby sound.As a result, when the aqueous vapor in packaging bag 100 etc. are discharged to outside from the vapor exhaust outlet of tubular, can send " Pi " such sound.

On the other hand, packaging bag in the past do not form as shown in Figure 4 from the banded 8a of the end seal portion edge part 7a that direction is outstanding to the inside, therefore in the time that packaging bag is in the past expanded by microwave-oven-heating, while peeling off when steam is discharged, till the part that 2 of starting to become V font are starting point 71,71 can be peeled off moment, steam is discharged, make pressure be maintained until state of equilibrium.Therefore, when the steam in packaging bag is discharged to outside, can there is not the situation of a part of steam and edge part 7a collision yet, in most of the cases can not sound.

To this, as shown in Figure 4, the packaging bag 100 of present embodiment is formed with from the banded 8a of the end seal portion edge part 7a that direction is outstanding to the inside, therefore in the time that the packaging bag 100 of present embodiment is expanded by microwave-oven-heating, in the time that the steam in packaging bag 100 is discharged to outside, part steam and edge part 7a bump, and form whirlpool, thereby can sound.As a result, can report packaging bag 100 opening by sound.Like this, for the packaging bag 100 of present embodiment, only form edge part by the structure of the sealing shape of arranging vapor seal portion 7, just can sound.

And the packaging bag 100 of present embodiment has the banded unsealing 9b of portion in the outer part than the banded 8a of end seal portion, steam is at the banded unsealing 9b of portion of process in the time that vapor exhaust outlet is discharged to outside.The banded unsealing 9b of portion is taking film each other as unencapsulated state forms, and therefore, in the time that steam passes through the banded unsealing 9b of portion, the film that forms the banded unsealing 9b of portion vibrates each other, thereby can send rattle.

In addition, in the packaging bag 100 of present embodiment, the row's vapor seal portion 7 that is used to form steam discharge portion is located at film and closes portion 6, this film closes portion 6 and is positioned at than the top side's of upper surface horizontal surface of the content D of packaging bag 100 position, therefore can prevent that content D in packaging bag 100 from being blown spills, and can prevent that the content D in packaging bag 100 from leaking.

In addition, closed row's vapor seal portion 7 of portion 6 by film, the banded 8a of end seal portion, the expansion that banded side seals 8b divides the expansion in the space forming and the base portion being made up of lower surface portion 1 and upper surface part 2 of packaging bag 100 superposes, and, the banded 8a of end seal portion at two ends of row vapor seal portion 7 and edge part 7a (with reference to Fig. 4) are unstripped and left behind, therefore the space that above-mentioned division forms is in the starting point 71 of row vapor seal portion 7, 71 swell symmetrically, can produce like this two films (the open side upper surface part 2a that makes to form film and close portion 6, depth side upper surface part 2b) the stress heaved of the both sides of central portion, as shown in Fig. 3 (c), form the 9 (9a of unsealing portion of steam discharge portion, 9b) opening, make to discharge to outside at aqueous vapor of packaging bag 100 interior generations etc.Therefore, even be placed with a large amount of content D at packaging bag 100 internal memories, also can guarantee to form the unsealing portion 9 of steam discharge portion discharging for HCS and be positioned at sufficiently high position, therefore can prevent from that content D from being blown to spill.

In addition, as shown in Figure 5, the polygon unsealing 9a of the portion utilization of formation steam discharge portion is divided by following part the region forming and is formed, this part is: along the outstanding shape line 9a1 of roughly V-shape of row vapor seal portion 7, end 91 with this outstanding shape line 9a1, 91 links and two tie line 9a2 that link with the banded unsealing 9b of portion, 9a2 and with these two tie line 9a2, the end 92 of 9a2, the 92 bottom line 9a3 that link, this polygon unsealing 9a of portion limits the open area (α 1 shown in Fig. 5 of steam discharge portion, α 2), therefore can control the discharge rate of the time per unit of the aqueous vapor etc. of discharging to outside.

For example, as shown in Fig. 5 (a), in the case of end 91, the 91 open area α 1 connected to each other and that obtain of outstanding shape line 9a1 grow, in the case of the length of the narrower part of sealed width is grown, the discharge rate of the time per unit of the aqueous vapor of discharging to outside etc. is more, on the other hand, as shown in Fig. 5 (b), in the case of end 91, the 91 open area α 2 connected to each other and that obtain of outstanding shape line 9a1 are shorter, the discharge rate of the time per unit of the aqueous vapor of discharging to outside etc. is less.

In addition, in the packaging bag 100 of present embodiment, the outstanding shape line 9a1 that limits in advance front end 90 sides that form the polygon unsealing 9a of portion be configured to taking with the inside bend shape 7a1 of front end 70 sides that forms row vapor seal portion 7 as roughly making to same shape the sealed width of front be less than the sealed width of other parts.And the position of the end 91,91 of outstanding shape line 9a1 is at least than the inner side by packaging bag 100 by the line connected to each other starting point 71,71 of row vapor seal portion 7.Thus, utilize micro-wave oven to heat packaging bag 100 is expanded packaging bag 100, from the front end 70 of row vapor seal portion 7 to by the region opening till the line connected to each other end 91,91 of outstanding shape line 9a1, thereby can form open area α 1, α 2.More specifically, the sealed width β 1 shown in (a), (b) of Fig. 5, β 2 is the width in the direction parallel with the direction of the stress of vapor seal portion of the row of acting on 7.As shown in Figure 5, for row's vapor seal portion 7 of present embodiment, the sealed width β 1 that is clipped in the region between inside bend shape 7a1 and the 1st outside curve shape (suitable with outstanding shape line 9a1) is less than the sealed width β 2 that is clipped in the region between inside bend shape 7a1 and the 2nd outside curve shape (suitable with tie line 9a2).Therefore, in the time producing steam, pressure concentration in row vapor seal portion 7, only sealed width is that the part of β 1 is peeled off, thereby can be suppressed at the discharge rate of the time per unit of the aqueous vapor etc. of packaging bag 100 interior generations.In addition, only sealed width is that the part of β 1 is peeled off, sealed width is that the part of β 2 links and left behind with the banded 8a of end seal portion, and these other parts that left behind form from the banded 8a of the end seal portion edge part 7a that direction is outstanding to the inside (with reference to Fig. 4 (a)).Therefore, when the steam in packaging bag 100 is discharged to outside, a part of steam and edge part 7a bump, and form whirlpool, thereby can sound.

In addition, for the packaging bag 100 after the opening of present embodiment, making that its open side is parallel with tie line 9a2, downward time, the opening portion of row vapor seal portion 7 is closed, can be as for preventing that the safety valve that content D leaks from playing a role.As a result, can from microwave oven safety take out the packaging bag 100 after heating, the pressurization cooking.

Wherein, in the packaging bag 100 of present embodiment, the bottom line 9a3 for convenience of explanation shape of the 9a of polygon unsealing portion sets, and is not in fact located at packaging bag 100.And in the packaging bag 100 of present embodiment, the polygon unsealing 9a of portion and the banded unsealing 9b of portion not utilize bottom line 9a3 to divide but as one, bottom line 9a3 is the part that forms the discharge orifice of discharging to outside for aqueous vapor etc.

Effect, the effect > of the packaging bag 100 of < present embodiment

Like this, the packaging bag 100 of present embodiment has row's vapor seal portion 7 of being V word sigmoid and giving prominence to towards the interior side direction of packaging bag 100 and adjacent with this row's vapor seal portion 7 and be formed on the 9 (9a of unsealing portion in the outside of row vapor seal portion 7 in unencapsulated mode as shown in Figure 2, 9b), rise and when packaging bag 100 is expanded at the internal pressure of packaging bag 100, as shown in Fig. 3 (b), row vapor seal portion 7 openings, by region and the 9 (9a of unsealing portion of this opening, 9b) be formed for discharging the steam discharge portion of aqueous vapor in packaging bag 100 etc.Row's vapor seal portion 7 of the formation steam discharge portion of present embodiment forms by heat-sealing, there is the non-conterminous inside bend shape 7a1 of packaging bag 100 inner sides and outside curve shape 9a1, the 9a2 by packaging bag 100 outsides adjacent with unsealing portion 9 of leaning on unsealing portion 9, and, by being that starting point 71,71 line connected to each other forms by the part of packaging bag 100 interior side directions than 2 that start to become V-shape.And, the heat-sealing of row vapor seal portion 7 the width beta 1, β 2 in region in front end 70 sides narrower (β 1 < β 2) of row vapor seal portion 7.

Therefore, in the time that the packaging bag 100 of present embodiment is expanded by microwave-oven-heating, as shown in Figure 4, the leading section that forms row vapor seal portion 7 is peeled off, other parts except leading section and the banded 8a of end seal portion link and left behind, and these other parts that left behind form from the banded 8a of the end seal portion edge part 7a that direction is outstanding to the inside.And, form each other the vapor exhaust outlet of tubular at edge part 7a.As a result, when the aqueous vapor in packaging bag 100 etc. are discharged to outside from the vapor exhaust outlet of tubular, can send " Pi " such sound.And, can only sound by the sealing shape of row vapor seal portion 7.

In addition, in the packaging bag 100 of present embodiment, do not change the inside bend shape 7a1 of row vapor seal portion 7 shape the position of the end 91,91 of outstanding shape line 9a1 is changed on the outstanding shape line 9a1 limiting in advance, as shown in Figure 5, thereby can make end 91,91 open area α connected to each other and that obtain change, can control the discharge rate of the time per unit of the aqueous vapor etc. of discharging to outside.Therefore, can effectively produce the stress causing because of steam and concentrate, make packaging bag 100 can not break and control open area α, thereby can cook with suitable pressure.

Wherein, it is identical with the width of bottom line 9a3 (tie line 9a2 width each other) that two tie line 9a2 that form the polygon unsealing 9a of portion of the packaging bag 100 of above-mentioned present embodiment are configured to end 91,91 width of open area α connected to each other and that obtain.But two tie line 9a2 also can be configured to: compared with the width of and the open area α that obtains connected to each other with end 91,91, the width (tie line 9a2 width each other) of bottom line 9a3 is narrower.Thus, the discharge orifice of can constriction discharging to outside for the aqueous vapor in packaging bag 100 interior generations etc., therefore can make the pressure rise in packaging bag 100.

In addition, as shown in Figure 2, it is same shape that the outstanding shape line 9a1 that forms front end 90 sides of the polygon unsealing 9a of portion of the packaging bag 100 of above-mentioned present embodiment is configured to the inside bend shape 7a1 of front end 70 sides that form row vapor seal portion 7, and the sealed width β 1 of vapor seal portion of the row of making 7 keeps constant.But, as long as the variable quantity of the sealed width β 1 of row vapor seal portion 7 is in specialized range, the inside bend shape 7a1 that the outstanding shape line 9a1 of the 9a of polygon unsealing portion there is no need to be configured to arranging vapor seal portion 7 is same shape, and also can be configured to the inside bend shape 7a1 that arranges vapor seal portion 7 is same shape roughly.Wherein, roughly same shape refers to and comprises the shape slightly different with inside bend shape 7a1.

(example 2 of the 1st embodiment)

Then, the example 2 of the 1st embodiment is described.

As shown in Figure 6, the banded 80a of end seal portion of the example 2 of the 1st embodiment is configured to taper and is configured to along with closing towards film from the starting point 71 of row vapor seal portion 7 that end on the length direction of portion 6 is gone and the width gamma of the banded 80a of end seal portion broaden (γ 1 < γ 2).

Thus, when the space being divided at the side seals 8b that is closed the 80a of end seal portion of row's vapor seal portion 7 of portion 6, band shape, band shape by film expands, compared with the example 1 of the 1st embodiment, the part of the front end 70 of the row's of acting on vapor seal portion 7 partly of can exerting all one's strength.As a result, compared with the example 1 of the 1st embodiment, can vapor seal portion of the row of making 7 easily peel off.

In addition, along with closing towards film from the starting point 71 of row vapor seal portion 7 that end on the length direction of portion 6 is gone and the width gamma of the banded 80a of end seal portion broadens, therefore compared with the shape shown in Fig. 2, flowing of steam easily changes, and easily form whirlpool, therefore can easily sound.And in the time being formed with steam discharge portion, the aqueous vapor in packaging bag 100 etc. easily lodges in this steam discharge portion, therefore can easily sound.As a result, compared with the example 1 of the 1st embodiment, can effectively report packaging bag 100 opening.

In addition, in the packaging bag 100 of present embodiment, the banded 80a of end seal portion is configured to taper, and therefore, compared with the example 1 of the 1st embodiment, the heat-sealing region of the banded 80a of end seal portion is more.Therefore in the region, forming at the banded 80a of end seal portion, form the 80b of non-tight portion.Thus, the bubble, the fold etc. that can be suppressed at when the banded 80a of end seal portion is sealed, in the region of the banded 80a of end seal portion, produce, therefore can maintain stable sealing intensity.

Effect, the effect > of the packaging bag 100 of < present embodiment

Like this, in the packaging bag 100 of present embodiment, the width gamma of the banded 80a of end seal portion linking with the two ends of row vapor seal portion 7 is configured to along with the position of the starting point 71,71 at the two ends from row vapor seal portion 7 is gone and tapered broadening (γ 1 < γ 2) towards the sidepiece of packaging bag 100.Thus, compared with the example 1 of the 1st embodiment, the part of the front end 70 of the row's of acting on vapor seal portion 7 partly of can exerting all one's strength.And, compared with the example 1 of the 1st embodiment, can vapor seal portion of the row of making 7 easily peel off, and can easily sound.

In addition, in the region of the banded 80a of end seal portion, be provided with the 80b of non-tight portion, therefore can utilize the 80b of non-tight portion to be absorbed in the bubble producing in the region of the banded 80a of end seal portion, and can suppress to produce fold etc., therefore can maintain stable sealing intensity.

Wherein, as long as the banded 80a of end seal portion of above-mentioned present embodiment is configured to along with the position of the starting point 71,71 at the two ends from row vapor seal portion 7 is gone and width gamma is tapered broaden (γ 1 < γ 2) towards the sidepiece of packaging bag 100, the shape of this banded 80a of end seal portion is not limited to the shape shown in Fig. 6, also can be configured to shape arbitrarily.For example, in Fig. 6, the banded 80a of end seal portion is configured to linearity, also can be configured to its part and contain curve.

(example 3 of the 1st embodiment)

Then, the example 3 of the 1st embodiment is described.

Row's vapor seal portion 7 of the example 3 of the 1st embodiment is for example configured to as shown in Fig. 7 (a): comprise be clipped in the sealed width β 2 with constant width in the region between inside bend shape 7a1 and the 2nd outside curve shape 9a2 and be clipped in inside bend shape 7a1 and the 1st outside curve shape 9a1 between the sealed width β 1 with constant width in region, and, compared with sealed width β 2, sealed width β 1 is narrower.In the case of the shape of this Fig. 7 (a), also with the example 1 of above-mentioned the 1st embodiment, example 2 is same, the width beta 1 that is clipped in the region between inside bend shape 7a1 and the 1st outside curve shape 9a1 is narrower than the width beta 2 that is clipped in the region between inside bend shape 7a1 and the 2nd outside curve shape 9a2, therefore while expansion utilizing micro-wave oven to heat, the thinner part that only forms the leading section β 1 of row vapor seal portion 7 is peeled off, other parts β 2 beyond leading section β 1 and the banded 8a of end seal portion link and left behind, other parts β 2 that this left behind forms the outstanding edge part of direction to the inside from the banded 8a of end seal portion, therefore when aqueous vapor in packaging bag 100 etc. is discharged to outside, can send " Pi " such sound.

In addition, as shown in Fig. 7 (b), the outside curve shape 9a2 of row's vapor seal portion 7 of the example 3 of the 1st embodiment is made up of a curved shape 9a2, and the sealed width β 1, the β 2 that are clipped in the region between inside bend shape 7a1 and outside curve shape 9a2 are configured to along with going and narrow towards the front end of row vapor seal portion 7.Sealed width β 1, the β 2 that thus, can make to be clipped in the region between inside bend shape 7a1 and outside curve shape 9a2 are along with going and narrow successively towards the front end of row vapor seal portion 7.In the case of the shape shown in (b) of this Fig. 7, also with the example 1 of above-mentioned the 1st embodiment, example 2 is same, the width beta 1 in the region between the inside bend shape 7a1 of vapor seal portion of the row of being clipped in 7 and outside curve shape 9a2, β 2 is along with going and narrow towards the front end of row vapor seal portion 7, therefore while expansion utilizing micro-wave oven to heat, part till the substantial middle portion of formation row vapor seal portion 7 is peeled off, the part left behind of row vapor seal portion 7 links with the banded 8a of end seal portion, and form edge part, therefore when aqueous vapor in packaging bag 100 etc. is discharged to outside, can send " Pi " such sound.

In addition, row's vapor seal portion 7 of the example 3 of the 1st embodiment is for example configured to as shown in Fig. 7 (c): the sealed width β 1 that is at least clipped in row's vapor seal portion 7 front end area between inside bend shape 7a1 and the 1st outside curve shape 9a1 is narrower than the sealed width β 2 of other parts.And, the 2nd outside curve shape 9a2 is made up of many articles of straight lines, be formed with roughly tetragonal wider region, i.e. steam convection section in the central authorities of the polygon unsealing 9a of portion, be formed with up and down the narrower region narrower than the wider region of central authorities at the polygon unsealing 9a of portion.Shape in this Fig. 7 (c), also with the example 1 of above-mentioned the 1st embodiment, example 2 is same, the width beta 1 that is clipped in the region between inside bend shape 7a1 and the 1st outside curve shape 9a1 is narrower than the width beta in other regions 2, therefore while expansion utilizing micro-wave oven to heat, the leading section β 1 that forms row vapor seal portion 7 peels off, other parts β 2 beyond leading section β 1 and the banded 8a of end seal portion link and left behind, other parts β 2 that this left behind forms the outstanding edge part of direction to the inside from the banded 8a of end seal portion.In addition, in the case of the shape shown in (c) of this Fig. 7, be formed with roughly tetragonal wider region, i.e. steam convection section in the central authorities of the polygon unsealing 9a of portion, be formed with up and down the narrower region narrower than the wider region of central authorities at the polygon unsealing 9a of portion, therefore peel off at the leading section β 1 that forms row vapor seal portion 7, steam is in the time that the polygon unsealing 9a of portion discharges to outside, as shown in Figure 8, in the wider region of the polygon unsealing 9a of portion, steam convection section both sides form whirlpool.As a result, can send " Pi " such sound due to the whirlpool of the formation of the both sides compared with wide region at the polygon unsealing 9a of portion.Wherein, the shape of steam convection section there is no need to be formed by straight lines, for example, also can utilize curve form etc. to be formed as having up and down narrower non-tight portion, having wider non-tight portion in central authorities.

Effect, the effect > of the packaging bag 100 of < present embodiment

Like this, row's vapor seal portion 7 of the packaging bag 100 of present embodiment is configured to as shown in Fig. 7 (a): comprise be clipped in the sealed width β 2 with constant width in the region between inside bend shape 7a1 and the 2nd outside curve shape 9a2 and be clipped in inside bend shape 7a1 and the 1st outside curve shape 9a1 between the sealed width β 1 with constant width in region, and, compared with sealed width β 2, sealed width β 1 is narrower.In addition, as shown in Fig. 7 (b), be configured to: be clipped in sealed width β 1, the β 2 in the region between inside bend shape 7a1 and outside curve shape 9a2 along with going and narrow towards the front end of row vapor seal portion 7.In addition, as shown in Fig. 7 (c), be configured to: the sealed width β 1, the β 2 that are clipped in the region between inside bend shape 7a1 and outside curve shape 9a1,9a2 are different, and the sealed width of leading section β 1 is narrower than the sealed width of other parts β 2.

Thus, while expansion utilizing micro-wave oven to heat, the leading section β 1 that forms row vapor seal portion 7 peels off, other parts β 2 beyond leading section β 1 and the banded 8a of end seal portion link and left behind, other parts β 2 that this left behind forms the outstanding edge part of direction to the inside from the banded 8a of end seal portion, therefore, when aqueous vapor in packaging bag 100 etc. is discharged to outside, can send " Pi " such sound.

(embodiment)

Then,, with reference to Fig. 9, Figure 10, the embodiment of above-mentioned embodiment is described.Wherein, following embodiment is an example, and the technological thought of present embodiment is not only defined in following embodiment.Fig. 9 represents the structure example of peeling off front and back of row's vapor seal portion of the packaging bag of the following embodiment that will illustrate 1～5, and Figure 10 represents the structure example of peeling off front and back of row's vapor seal portion of the packaging bag of comparative example 1～2.Wherein, Fig. 9, Figure 10 represent to arrange the state of peeling off front and back of vapor seal portion, and profit dots the position of peeling off in the sealing of row vapor seal portion.

Use skin by the stacked film that the nylon of 15 μ m forms, internal layer is made up of the wire Low Density Polyethylene of 60 μ m, utilize sealing band (シールバー) sealing, shown in shaping Fig. 1 (a), such side has the packaging bag of opening 4.In the packaging bag being shaped, fill the cloth that contains water as content, afterwards opening 4 is sealed and make such film shown in (b) of Fig. 1 and close portion 6 and have the packaging bag of row vapor seal portion 7.For 20 packaging bag samples 20, carry out respectively such test: in the time utilizing micro-wave oven to carry out cooking to each sample, arranging the sealing shape after steam and sending " Pi " such sound.

(embodiment 1)

For the packaging bag of embodiment 1, as shown in before the peeling off of Fig. 9 (a), row vapor seal portion 7 is configured to and is that roughly V word shape is outstanding, and only the sealed width of front end is narrower.

Utilizing after the microwave-oven-heating cooking, as shown in after the peeling off of Fig. 9 (b), 15 samples in 20 samples send " Pi " such sound, are formed with the outstanding edge part of direction to the inside from banded end seal portion.

(embodiment 2)

For the packaging bag of embodiment 2, as shown in before the peeling off of Fig. 9 (c), banded end seal portion is configured to cone-shaped.Embodiment 1 shown in before the peeling off of (a) of other structure and Fig. 9 is identical.

Utilizing after the microwave-oven-heating cooking, when pressure rise in packaging bag, packaging bag expand, as shown in as rear in peeling off of Fig. 9 (d), 18 samples in 20 samples send " Pi " such sound, are formed with the outstanding edge part of direction to the inside from banded end seal portion.

(embodiment 3)

As shown in before the peeling off of Fig. 9 (e), the packaging bag of embodiment 3 is configured to: the sealed width of the front end of row vapor seal portion is narrower, and, be provided with the pair of outside sealing of the linearity parallel with arranging steam direction taking the path (unsealing portion) of steam after peeling off as the mode of tubular, the unsealing portion in row vapor seal portion outside is home base shape (ホームベース shape).Other structure is identical with embodiment 2.

Utilizing after the microwave-oven-heating cooking, 19 samples in 20 samples send " Pi " such sound, as shown in after the peeling off of Fig. 9 (f), are formed with the outstanding edge part of direction to the inside from banded end seal portion.(17/20)。

(embodiment 4)

As shown in before the peeling off of Fig. 9 (g), the packaging bag of embodiment 4 is configured to: along with going towards the front end of row vapor seal portion, sealed width narrows gradually.Other structure is identical with embodiment 2.

Utilizing after the microwave-oven-heating cooking, 14 samples in 20 samples send " Pi " such sound, as shown in after the peeling off of Fig. 9 (h), are formed with the outstanding edge part of direction to the inside from banded end seal portion.

(embodiment 5)

As shown in before the peeling off of Fig. 9 (i), the packaging bag of embodiment 5 is configured to: along with going towards the front end of row vapor seal portion 7, sealed width narrows.The path of steam after peeling off (central authorities of polygon unsealing portion) is formed with roughly tetragonal wider region, i.e. steam convection section, is formed with up and down the narrower region narrower than the wider region of central authorities in polygon unsealing portion.Other structure is identical with embodiment 1.

Utilizing after the microwave-oven-heating cooking, 20 samples in 20 samples send " Pi " such sound, as shown in after the peeling off of Fig. 9 (j), are formed with the outstanding edge part of direction to the inside from banded end seal portion.

(comparative example 1)

For the packaging bag of comparative example 1, as shown in before the peeling off of Figure 10 (k), the sealed width of row vapor seal portion is all identical.Other structure is identical with embodiment 1.

Utilizing after the microwave-oven-heating cooking, 6 samples in 20 samples send " Pi " such sound, for the sample of not sounding, as shown in after the peeling off of Figure 10 (l), do not form the outstanding edge part of direction to the inside from banded end seal portion.

(comparative example 2)

For the packaging bag of comparative example 2, as shown in before the peeling off of Figure 10 (m), the sealed width of row vapor seal portion is all identical.And the unsealing portion around being surrounded by banded end seal portion and row vapor seal portion of stacked film is formed with the joint-cutting of linearity, to make it possible to discharging steam from this joint-cutting to outside.

Utilizing after the microwave-oven-heating cooking, 3 samples in 20 samples send " Pi " such sound, for the sample of not sounding, as shown in after the peeling off of Figure 10 (n), do not form the outstanding edge part of direction to the inside from banded end seal portion.

(test results)

From above-mentioned test results, while peeling off in row vapor seal portion, the packaging bag of the embodiment 1～5 of formation edge part is in the time being cooked by microwave-oven-heating, and most sample all sends " Pi " such sound.This is because when the steam in packaging bag is discharged to outside, steam and edge part bump, and the mobile of steam changed, and form whirlpool, thereby sound.

And known, as the packaging bag of embodiment 2～4, banded end seal portion is configured to taper, thereby more easily sends " Pi " such sound.This is because because banded end seal portion is configured to taper, thereby compared with the shape shown in embodiment 1, flowing of steam easily change, and easily forms whirlpool, therefore can easily sound.And be because in the time forming the steam discharge portion of discharging to outside for steam, the aqueous vapor in packaging bag etc. easily lodges in this steam discharge portion, therefore can easily sound.

And known, as the packaging bag of embodiment 5, the central authorities of polygon unsealing portion that form steam discharge portion be formed with tetragonal wider region roughly, polygon unsealing portion be formed with up and down the narrower region narrower than the wider region of central authorities, i.e. steam convection section, thereby send reliably " Pi " such sound.This be because, while discharging steam in the polygon unsealing portion that certainly forms steam discharge portion to outside, form whirlpool in the both sides in the wider region of polygon unsealing portion, can send reliably " Pi " such sound due to the whirlpool of this formation.

Wherein, above-mentioned embodiment and embodiment are preferred embodiment of the present invention and embodiment, scope of the present invention is not limited in the above-described embodiment and examples, in the scope that does not depart from main idea of the present invention, can implement the present invention with the embodiment that has carried out various changes.

For example, in the above-described embodiment, packaging bag 100 is provided with film and closes portion 6, and the edge that closes portion 6 at this film is provided with row vapor seal portion 7 and unsealing portion 9, and the edge that closes portion 6 at film is formed with steam discharge portion.But, also can be for like this: packaging bag 100 is not provided with film and closes portion 6, and row vapor seal portion 7 and unsealing portion 9 are set at the edge of the packaging bag 100 being made up of lower surface portion 1 and upper surface part 2, forms steam discharge portion at the edge of packaging bag 100.In this case, also can obtain the effect identical with above-mentioned embodiment.But, be provided with like that the packaging bag 100 that film closes portion 6 at embodiment described above, when utilizing micro-wave oven to heat this packaging bag 100, as shown in Fig. 3 (a), packaging bag 100 expands, by film close row's vapor seal portion 7 of portion 6, the expansion that the banded 8a of end seal portion, banded side seals 8b divide the expansion in the space forming and the base portion being made up of lower surface portion 1 and upper surface part 2 of packaging bag 100 superposes, the part that therefore film closes portion 6 becomes the easiest position expanding because of aqueous vapor etc.Therefore, be configured to like that by embodiment described above that the edge that closes portion 6 at film arranges row vapor seal portion 7 and unsealing portion 9 forms steam discharge portion, thus because of aqueous vapor in packaging bag 100 interior generations etc. easily the front end 70 of the row's of making vapor seal portion 7 peel off, thereby can easily form steam discharge portion, and can easily sound.And, can effectively be suppressed at the discharge rate of the time per unit of aqueous vapor of packaging bag 100 interior generations etc.

In addition, the fore-end being clipped between inside bend shape 7a1 and the 1st outside curve shape 9a1 by vapor seal portion of the row of making 7 takes the lead in peeling off than narrow this fore-end that makes of other parts, except the method, for example, can apply by easily peel off resin only fore-end form easy stripping portion grade and be not subject to the size restriction ground of sealed width only to make the peel strength of fore-end weaken, the pressure-acting producing because of steam during in row vapor seal portion 7 only leading section peel off and form the such form of edge part 7a.

In addition, the shape of row vapor seal portion 7 is not limited to V-shape, also can be for such as circular shape etc.And, in row vapor seal portion 7, the weak part of peel strength is not limited to arrange the fore-end (midway location of the banded side seals 8a of both sides) of vapor seal portion 7, only for example also can be formed on the end etc. that forms the such row's vapor seal portion 7 of edge part in a side.

Adopt the present invention, only just can sound by the so simple structure of shape that film is sealed to the sealing forming.

The 2nd embodiment

Present embodiment is that its object is sound-inhibiting about the improvement of the sound sending in the time that steam is discharged.

For above-mentioned patent documentation 1,3, by discharging to outside at the inner steam producing of packaging bag, avoid the pressure rise of packaging bag inside.For example, in above-mentioned patent documentation 1, vapor seal portion of the row of making takes the lead in peeling off, and makes steam from outwards portion's discharge herein.In addition, in above-mentioned patent documentation 3, steam sheds to outside from the saturating portion of easy steaming being located in sealing.

But, for above-mentioned patent documentation 1,3, in the time that discharging to outside, the inner steam producing of packaging bag sends " Pi " such sound, and scaring is to user sometimes.

Therefore, generally acknowledge the packaging bag that is necessary that exploitation is not sounded in the time that the inner steam producing of packaging bag is discharged to outside.

Present embodiment is In view of the foregoing made, and its object is to provide a kind of can be suppressed at the packaging bag of sounding when the inner steam producing of packaging bag is discharged to outside.

The summary > of the packaging bag 200 of < present embodiment

First, the summary of the packaging bag 200 of present embodiment is described with reference to Figure 11～Figure 13.

For the packaging bag 200 of present embodiment, rise and packaging bag 200 while expanding at the internal pressure of packaging bag 200, row vapor seal portion 7 peels off and opening, forms the 1st steam discharge portion 101 (with reference to Figure 13) of discharging to outside for the steam in packaging bag 200 by region and the unsealing portion 9 (9a, 9b) of this opening.And (in the present embodiment, being the polygon unsealing 9a of portion) is formed with the 2nd steam discharge portion 102 in unsealing portion 9.

Therefore, as shown in Figure 13 (a), for the packaging bag 200 of present embodiment, at least discharge to outside from the 1st steam discharge portion 101 and the 2nd steam discharge portion 102 at the inner steam producing of packaging bag 200, can make steam at least discharge to outside with two-dimensional directional.As a result, in the time that the inner steam producing of packaging bag 200 is discharged to outside, can suppress to sound.

For packaging bag in the past, the steam producing in packaging bag inside to discharging to outside, is therefore the structure of easily sounding with one-dimensional square.With respect to this, for the packaging bag 200 of present embodiment, can make at least to discharge to outside with two-dimensional directional (the 1st steam discharge portion the 101, the 2nd steam discharge portion 102) at the inner steam producing of packaging bag 200, therefore can suppress to sound.Below, explain the packaging bag 200 of present embodiment with reference to accompanying drawing.

(the 2nd embodiment)

The structure example > of < packaging bag 200

First, the structure example of the packaging bag 200 of present embodiment is described with reference to Figure 11～Figure 13.Figure 11 is the figure that represents the structure example of the packaging bag 200 of present embodiment, (a) of Figure 11 is the block diagram of the packaging bag 200 before airtight opening 4, and (b) of Figure 11 is accommodated with content D and seals opening 4 and the block diagram of airtight packaging bag 200 in packaging bag 200.Figure 12 is the figure that represents to be located at the film shown in Fig. 1 and close row's vapor seal portion 7 of portion 6 and the structure example of unsealing portion 9 (the polygon unsealing 9a of portion, the banded unsealing 9b of portion).Figure 13 is the structure example of the packaging bag 200 of the state that expanded by microwave-oven-heating of the packaging bag 200 shown in presentation graphs 1 (b), (a) of Figure 13 is the lateral plan of packaging bag 200, and (b) of Figure 13 represents to arrange front end 70 openings of vapor seal portion 7 and the figure that forms the state of the 1st steam discharge portion 101.

Be formed with the 2nd steam discharge portion 102 at the polygon unsealing 9a of portion.The 2nd steam discharge portion 102 is formed at least one party in the two membranes (open side upper surface part 2a, depth side upper surface part 2b) that forms the polygon unsealing 9a of portion, as shown in Figure 13 (a), the direction that the direction in the time that the 1st steam discharge portion 101 is discharged to outside is different along it such as aqueous vapor is discharged to outside from the 2nd steam discharge portion 102.

Thus, aqueous vapor that the packaging bag 200 of present embodiment can make packaging bag 200 inside etc. is discharged to outside with two-dimensional directional.Result, even if the internal pressure of packaging bag 200 rises, packaging bag 200 expands, owing to can making aqueous vapor in packaging bag 200 etc. at least discharge to outside from the 1st steam discharge portion 101 and the 2nd steam discharge portion 102, therefore also can prevent that packaging bag 200 from breaking.And, in the time that the packaging bag 200 inner aqueous vapors that produce etc. are discharged to outside, can suppress to sound.

In addition, the shape that is formed at the 2nd steam discharge portion 102 of the polygon unsealing 9a of portion is not particularly limited, as long as can make the aqueous vapor etc. of packaging bag 200 inside discharge to outside, can be configured to arbitrary shape, can be by formation such as Punching Technology.For example, the 2nd steam discharge portion 102 can be made up of breach such as the joint-cuttings such as circular arc, straight line, V word, U word, circle, triangle, quadrangle, trapezoidal, polygons.In addition, by not for linearity is polygon, circle, and make the discharge rate of unit time of steam more, therefore preferred.In addition, in the present embodiment, forming the open side upper surface part 2a of the polygon unsealing 9a of portion and depth side upper surface part 2b and be formed with on the two the 2nd steam discharge portion 102 of same shape, but also can only be formed at open side upper surface part 2a or depth side upper surface part 2b, also can form the 2nd different steam discharge portion 102 of shape.

In addition, in the packaging bag 200 of present embodiment, the tie line 9a20 for convenience of explanation shape of the 9a of polygon unsealing portion establishes, and is not in fact located at packaging bag 200.And in the packaging bag 200 of present embodiment, the polygon unsealing 9a of portion and the banded unsealing 9b of portion not utilize tie line 9a20 to divide but as one, tie line 9a20 is the part that forms the discharge orifice of discharging to outside for aqueous vapor etc.

Effect, the effect > of the packaging bag 200 of < present embodiment

Like this, the packaging bag 200 of present embodiment has as shown in Figure 12 towards the interior side direction of packaging bag 200 and is the outstanding row's vapor seal portion 7 of bending and adjacent with this row's vapor seal portion 7 and be formed on (the polygon unsealing 9a of portion of unsealing portion 9 in outside of row vapor seal portion 7 in unencapsulated mode, the banded unsealing 9b of portion), rise and packaging bag 200 while expanding at the internal pressure of packaging bag 200, as shown in Figure 13 (b), row vapor seal portion 7 openings, by region and (the polygon unsealing 9a of portion of unsealing portion 9 of this opening, the banded unsealing 9b of portion) formation the 1st steam discharge portion 101.And (9a of polygon unsealing portion in the present embodiment) is formed with the 2nd steam discharge portion 102 in unsealing portion 9.

For the packaging bag 200 of present embodiment, at least discharge to outside from the 1st steam discharge portion 101 and the 2nd steam discharge portion 102 at the inner aqueous vapors that produce of packaging bag 200 etc., can make aqueous vapor etc. at least discharge to outside with two-dimensional directional.As a result, can discharge to outside a large amount of steams, can be suppressed at when inner aqueous vapors that produce of packaging bag 200 etc. are discharged to outside and sound.

In addition, as shown in figure 12, it is same shape that the outstanding shape line 9a10 that forms front end 90 sides of the polygon unsealing 9a of portion of the packaging bag 200 of above-mentioned present embodiment is configured to the inside bend shape 7a1 of front end 70 sides that form row vapor seal portion 7, constant thereby the sealed width of vapor seal portion of the row of making 7 keeps.But, as long as the variable quantity of the sealed width of row vapor seal portion 7 is in specialized range, the inside bend shape 7a1 that the outstanding shape line 9a10 of the 9a of polygon unsealing portion there is no need to be configured to arranging vapor seal portion 7 is same shape, and also can be configured to the inside bend shape 7a1 that arranges vapor seal portion 7 is same shape roughly.Wherein, roughly same shape refers to and comprises the shape slightly different with inside bend shape 7a1.

In addition, the structure example of in the above-described embodiment, the aqueous vapor in packaging bag 200 etc. at least being discharged to outside, at least being discharged to outside with two-dimensional directional at the inner steam producing of packaging bag 200 from the 1st steam discharge portion 101 and the 2nd steam discharge portion 102 is illustrated.But, be not limited to two-dimensional directional, new steam discharge portion also can be set in packaging bag 200, make to discharge with multi-dimensional direction at the inner steam producing of packaging bag 200.

The 3rd embodiment

Present embodiment is the improvement about the fissility of row vapor seal portion.

For the packaging bag with row vapor seal portion of above-mentioned patent documentation 1,4, there are the following problems: in the time of pressure rise, stress concentrates on the connected to each other and bight etc. that forms of sealing partly, do not expect that from this bight etc. the part of peeling off peels off, and cause leakage of content etc. etc.

Present embodiment is In view of the foregoing made, its object be to provide a kind of have row vapor seal portion, can suppress the packaging bag of peeling off from less desirable part.

(summary of packaging bag 300 of the present invention)

Utilize Figure 11 that the packaging bag 300 of present embodiment is described.Packaging bag 300 is characterised in that, this packaging bag 300 has row vapor seal portion 7, the sealing in the bight that the 1st banded sealing 8a forms with the 2nd banded sealing 8b link (for example, the part of Reference numeral 8b) peel strength the highest, the 1st sealing 8a of this band shape is connected with row vapor seal portion 7, and the 2nd sealing 8b of this band shape is crossing with the 1st sealing 8a.

For packaging bag 300 of the present invention, the peel strength of the sealing in the bight that stress is concentrated partly in the time that the internal pressure of packaging bag 300 rises is the highest, therefore can suppress not expect from this bight etc. that the part of peeling off peels off.As a result, can prevent that the content D in packing material 300 from leaking.Below, explain the embodiment of packaging bag 300 of the present invention with reference to accompanying drawing.

(example 1 of the 3rd embodiment)

The structure example > of < packaging bag 300

Row vapor seal portion 7 peel strength than the peel strength of the part of the heat-sealing of the 1st sealing 8a being connected with this row's vapor seal portion 7 a little less than.And, a little less than the peel strength of the part of the heat-sealing of the 1st sealing 8a compares the peel strength of part of the heat-sealing of the 2nd sealing 8b crossing with the 1st sealing 8a.

, close in portion 6 each portion 7 of heat-sealing at film, the peel strength of 8a, 8b is configured to the condition (1) below meeting.

Condition (1)

The peel strength of peel strength < the 2nd sealing 8b of peel strength < the 1st sealing 8a of row vapor seal portion 7

The packaging bag 300 of present embodiment is configured to and meets above-mentioned condition (1), therefore can make the 1st sealing 8a and the 2nd sealing 8b link and the peel strength of the sealing in the bight that forms is the highest.Therefore,, in the time that internal pressure rising, the packaging bag 300 of packaging bag 300 expand, can prevent from peeling off from the sealing in the bight that steam is detained, stress easily raises.Result, in the time that packaging bag 300 is expanded, can suppress in advance the situation that appearance is peeled off from less desirable part, and make it to peel off from front end 70 sides of row vapor seal portion 7, and easily form the 1st steam discharge portion 101, thereby can prevent reliably that content D from leaking from less desirable position.

In addition, if close in portion 6 each portion 7 of heat-sealing at film, the peel strength of 8a, 8b can meet above-mentioned condition (1), can utilize arbitrarily structure to form film and close portion 6.As the peel strength diverse ways that makes each portion 7,8a, 8b, can list the diverse ways such as the sealed width of temperature while for example making to seal, pressure, sealing.

At least one party's difference in the sealed width of temperature when making to seal, pressure, sealing etc., can make each portion 7 of heat-sealing, the peel strength difference of 8a, 8b.For example, temperature, pressure when reducing to seal, can make peel strength weaken.On the contrary, the temperature while heat-sealing by increase, pressure, can make peel strength strengthen.And, by shortening the sealed width of sealing, can make peel strength weaken.On the contrary, by lengthening sealed width, can make peel strength strengthen.

In addition, for example, as shown in Figure 14, Figure 15, to form film close portion 6 open side upper surface part 2a, depth side upper surface part 2b the two a part implement printing and form printed layers, make formation arrange the layer thickness difference of each portion 7 of vapor seal portion 7, the 1st sealing 8a, the 2nd sealing 8b, 8a, 8b and seal, thereby also can make the each portion 7 forming by this heat-sealing, the peel strength difference of 8a, 8b.Figure 14 represents the open side upper surface part 2a to being formed with printed layers, depth side upper surface part 2b seals and the film that forms closes the structure example of portion 6, Figure 15 is the each portion 7 that represents to form the film shown in Figure 14 and close portion 6, 8a, the figure of the layer structure example of 8b, Figure 15 (a) represent the film shown in Figure 14 close portion 6 and decide what is right and what is wrong along A-A' line after the layer structure example of the 2nd sealing 8b, Figure 15 (b) represent the film shown in Figure 14 close portion 6 and decide what is right and what is wrong along B-B' line after the layer structure example of the 1st sealing 8a, (c) of Figure 15 represents that the film shown in Figure 14 closes portion 6 along the figure that arranges the layer structure example of vapor seal portion 7 after C-C' line is decided what is right and what is wrong.

For example, as shown in Figure 15 (c), in depth side upper surface part 2b, be formed with two-layer printed layers 2b2,2b3 in the part that is formed with row vapor seal portion 7, as shown in Figure 15 (b), be formed with one deck printed layers 2b2 in the part that is formed with the 1st sealing 8a, as shown in Figure 15 (a), do not form printed layers in the part that is formed with the 2nd sealing 8b, thereby make the bed thickness difference of each portion 7,8a, 8b.In addition, as shown in Figure 15 (c), in open side upper surface part 2a, be formed with two-layer printed layers 2a2,2a3 in the part that is formed with row vapor seal portion 7, as shown in Figure 15 (b), be formed with one deck printed layers 2a2 in the part that is formed with the 1st sealing 8a, as shown in Figure 15 (a), do not form printed layers in the part that is formed with the 2nd sealing 8b, thereby make the bed thickness difference of each portion 7,8a, 8b.And, make depth side upper surface part 2b and open side upper surface part 2a overlapping and seal and form the film shown in Figure 14 and close portion 6.Thus, form film and close each portion 7 of portion 6, the bed thickness difference of 8a, 8b, therefore can make the peel strength of the part of heat-sealing meet above-mentioned condition (1).In addition, preferably as shown in Figure 14 being formed with the part of row vapor seal portion 7, be formed with printed layers 2b2,2a2 that the part of the 1st sealing 8a forms and be not formed at and be formed with the part of the 2nd sealing 8b and separate with the part that is formed with the 2nd sealing 8b.Therefore, as shown in figure 14, printed layers 2b2,2a2 are formed on than forming film and close in the short scope of distance between the 2nd sealing 8b, the 8b at two ends of portion 6.Thus, occur skew in the formation position of printed layers 2b2,2a2, also can prevent from forming printed layers 2b2,2a2 in the part that is being formed with the 2nd sealing 8b, therefore can make the 1st sealing 8a and the 2nd sealing 8b link and the peel strength of the sealing in the bight of formation is the highest.And, printed layers 2b2,2a2 separate with the part that is formed with the 2nd sealing 8b, can make thus the peel strength by the end of the 2nd sealing 8b side of the 1st sealing 8a improve, thereby can make the region that peel strength is higher in the sealing of the 1st sealing 8a and the part of the 2nd sealing 8b link increase.

Film shown in Figure 14, Figure 15 closes portion 6 and forms by following method.

First, for example,, at the upper printing-ink of base material (, the nylon) 2b1 of the film for forming depth side upper surface part 2b, form the 1st printed layers 2b2.Then, printing-ink on the 1st printed layers 2b2, forms the 2nd printed layers 2b3.In this case, compared with the 1st printed layers 2b2, the 2nd printed layers 2b3 uses the weak material of bind strength.Thus, peel strength that can vapor seal portion of the row of making 7 weakens.Wherein, in the present embodiment, as long as can make the peel strength of the 2nd printed layers 2b3 more weak than the peel strength of the 1st printed layers 2b2, the material of ink or the material of lining cement that are used to form the 1st printed layers 2b2, the 2nd printed layers 2b3 are not particularly limited, and can use the ink of any materials.For example, the material that also can be used in the ink that forms the 1st printed layers 2b2 is different with the material of ink that is used to form the 2nd printed layers 2b3, a little less than making the 2nd printed layers 2b3 than the 1st printed layers 2b2.In addition, the material that also can be used in the ink that forms the 1st printed layers 2b2 is identical with the material of ink that is used to form the 2nd printed layers 2b3, in the ink that is used to form the 1st printed layers 2b2, add for improving the lining cement of bonding force, make the peel strength of the 1st printed layers 2b2 stronger than the peel strength of the 2nd printed layers 2b3, the peel strength that makes the 2nd printed layers 2b3 compared with the 1st printed layers 2b2 relatively a little less than.In addition, also can in the ink that is used to form the 2nd printed layers 2b3, add the remover for reducing bonding force, the peel strength that makes the 2nd printed layers 2b3 than the peel strength of the 1st printed layers 2b2 a little less than.Like this, form printed layers 2b2,2b3 by the ink that uses the different material of peel strength or be added with the material that this peel strength is different, the peel strength that also can make the 2nd printed layers 2b3 than the peel strength of the 1st printed layers 2b2 a little less than.

Then, for example, by the base material 2b1 that is formed with two-layer printed layers 2b2,2b3 and sheet material (, Low Density Polyethylene) the 2b4 dry lamination (De ライラミネート) with heat sealability together.Thus, form the film of depth side upper surface part 2b.

In addition, for example, at the upper printing-ink of base material (, the nylon) 2a1 of the film for forming open side upper surface part 2a, form the 1st printed layers 2a2.Then, printing-ink on the 1st printed layers 2a2, forms the 2nd printed layers 2a3.In this case, the peel strength that makes the 2nd printed layers 2a3 than the peel strength of the 1st printed layers 2a2 a little less than.

Then, by the base material 2a1 that is formed with two-layer printed layers 2a2,2a3, for example, 2a4 dry lamination together with the sheet material (, Low Density Polyethylene) with heat sealability.Thus, form the film of open side upper surface part 2a.

Then, the film of the film to open side upper surface part 2a and depth side upper surface part 2b seals, and forms the film with row vapor seal portion 7, the 1st sealing 8a and the 2nd sealing 8b shown in Figure 14 and closes portion 6.

Thus, obtain the film shown in Figure 14 and close portion 6.

In addition, the film shown in Figure 14 closes portion 6 and is configured to: on the 2nd sealing 8b, do not form printed layers, formation film closes each portion 7 of portion 6, the bed thickness of 8a, 8b meets above-mentioned condition (1).But, if can meet above-mentioned condition (1), also can on the 2nd sealing 8b, also form printed layers.In this case, the printed layers of the 1st sealing 8a, row vapor seal portion 7 increases.

In addition, close portion 6 for the film shown in Figure 14, as shown in figure 15, be formed with multi-sheet printed layer in the two a part of open side upper surface part 2a, depth side upper surface part 2b that forms film and close portion 6, make to form the bed thickness difference of the each portion 7 shown in Figure 14,8a, 8b and seal, making thus the peel strength difference of the each portion 7 shown in Figure 14,8a, 8b.But, close on open side upper surface part 2a, the depth side upper surface part 2b of portion 6 and form one deck printed layers that peel strength is different and seal forming film, thereby also can make the peel strength difference of the each portion 7 shown in Figure 14,8a, 8b.For example, in depth side upper surface part 2b, form the weak printed layers of peel strength in the part that is formed with row vapor seal portion 7, form the stronger printed layers of peel strength in the part that is formed with the 1st sealing 8a, do not form printed layers in the part that is formed with the 2nd sealing 8b, and seal, thereby also can make the peel strength of each portion 7,8a, 8b different and meet above-mentioned condition (1).In this case, first, avoid the region of the part that is formed with row vapor seal portion 7, only print the stronger ink of peel strength in the region of the part that is formed with the 1st sealing 8a.Then, only form printing in the region of the part that is formed with row vapor seal portion 7 with the weak ink of peel strength.Thus, even if formation one deck printed layers also can make the peel strength difference of the each portion 7 shown in Figure 14,8a, 8b.

Effect, the effect > of the packaging bag 300 of < present embodiment

Like this, the packaging bag 300 of present embodiment is configured to: formation film closes each portion 7 of the 7, the 1st sealing 8a of row's vapor seal portion, the 2nd sealing 8b of portion 6, the peel strength of 8a, 8b meets following condition.

Thus, the 1st sealing 8a and the 2nd sealing 8b link and the peel strength of the sealing in the bight that forms is the highest, therefore rise at the internal pressure of packaging bag 300, packaging bag 300 is while expanding, can prevent from peeling off from the sealing in bight.As a result, peel off from front end 70 sides of the most weak row's vapor seal portion 7 of peel strength, can easily form the 1st steam discharge portion 101, thereby can prevent that the content D in packaging bag 300 from leaking from less desirable part.

In addition, close in portion 6 at the film of present embodiment, roughly the peel strength of the hermetic unit of V-shape relatively a little less than, can further suppress thus to peel off from less desirable part.

(example 2 of the 3rd embodiment)

The example 2 of the 3rd embodiment then, is described.

As shown in figure 16, the packaging bag 300 of the example 2 of the 3rd embodiment is formed with at the linking portion of the 1st sealing 8a and the 2nd sealing 8b link the strong sealing 8ab that peel strength is the strongest.Thus, link and the part that forms has strong sealing 8ab at the 1st sealing 8a and the 2nd sealing 8b, the sealing 8ab that therefore can avoid improving oneself peels off.

Result, in the time that internal pressure rising, the packaging bag 300 of packaging bag 300 expand, can not peel off from the highest strong sealing 8ab of peel strength, but peel off from front end 70 sides of the most weak row's vapor seal portion 7 of peel strength, the front end 70 of certainly arranging vapor seal portion 7 to 2 that will start to become V-shape be roughly region opening till starting point 71,71 line connected to each other.And, form the 1st steam discharge portion 101 of discharging to outside for the aqueous vapor in packaging bag 300 etc. by region and the unsealing portion 9 (the polygon unsealing 9a of portion, the banded unsealing 9b of portion) of this opening.Thus, in the time that packaging bag 300 expands, can suppress in advance to occur situation about peeling off from less desirable part, but front end 70 sides of certainly arranging vapor seal portion 7 peel off, thereby can easily form the 1st steam discharge portion 101.

In addition, above-mentioned embodiment is preferred embodiment of the present invention, and scope of the present invention is not only defined in above-mentioned embodiment, in the scope that does not depart from main idea of the present invention, can implement the present invention with the embodiment that has carried out various changes.

The 4th embodiment

Present embodiment relates to a kind of for having the accommodating container of bag for the microwave of row steam mechanism.

The microwave of the keep flat type such with surrounding sealing is with compared with bag, and such section is general triangular described in patent documentation 5, and vertical manufacture of putting the packaging bag of type microwave is numerous and diverse and difficult.And, while use, when indulging the state of putting and use, there is the danger that skews in microwave heating process in micro-wave oven, therefore become the state use keeping flat.But, for so vertical type microwave bag of putting, in the time that the state to keep flat uses, side (bottom) is wider general triangular, while use in micro-wave oven because row's steam portion of pressure rise opening is lower or be positioned at lower position with respect to the height of bag entirety, and cannot effectively transmit to row steam portion the stress producing because of pressure rise, cause arranging steam performance and reduce.

In addition, such microwave does not become the part of handle with bag, and therefore after microwave heating, packaging bag entirety becomes the condition of high temperature, can be burned etc. in worry in the time that micro-wave oven takes out.In addition, packaging bag self is vertical unstable, therefore after microwave heating, indulges and puts, top is removed and made a bag opening, also because danger such as having overturning is difficult to the food in the direct foods bag of packaging bag, has not given play to vertical advantage of putting completely.

The invention of present embodiment is In view of the foregoing made, its object is to provide a kind of such microwave bag accommodating container: can easily manufacture, do not exist the microwave packaging bag that is formed with row steam portion, along with pressing in causing because of vapour pressure to rise, the danger such as overturning occur, can carry out microwave heating to indulge the state of putting.

(example 1 of the 4th embodiment)

First, the container of present embodiment is described with reference to Figure 17～Figure 19.

Figure 17 is the block diagram of bag accommodating container 400 for the microwave of present embodiment.The microwave of present embodiment is made of paper with bag accommodating container 400, has bottom surface 402 and side 403 and the roughly cylindrical container for upper opening.

Microwave comprises encirclement bottom surface 402 as shown in Figure 19 and is the side 403 that substantially elliptical vertically erects with respect to bottom surface 402 with bag accommodating container 400.The height of side 403 is can not be by the height covering for discharging row's vapor seal portion of steam of packaging bag described later.The two ends of the intersection line between bottom surface 402 and side 403 have bottom surface 402 broken line 405 connected with each other with side 403, have along the circular-arc gap 406 of the broken line 405 at these two ends in central authorities.Like this, bottom surface 402 and side 403 the two only the part at two ends be connected, can leicht fallen D/A and easily bending.In addition, the bridge shape that heave upward for two-terminal-grounding, central portion bottom surface 402.And bottom surface 402 at least being supported and erect, can keep the vertical flat pattern of putting state by side 403 in the time being accommodated with packaging bag.

Then, microwave is described with the manufacturing process of bag accommodating container 400.Figure 18 is the expansion drawing of bag accommodating container 400 for the microwave of present embodiment.Microwave is to form by bending single paper with bag accommodating container 400.

In the time that microwave is launched with bag accommodating container 400, being positioned at central bottom surface 402 is made up of the substantially elliptical of the circular-arc curved portion 412 that has the straight line portion 411 of ground connection after assembling, be connected with side 403.Curved portion 412 has the broken line 405 that bottom surface 402 is connected with side 403 at its two ends, between the broken line 405 at two ends mode connected to each other broken line 405 is formed with along joint-cutting circular-arc, that be equivalent to gap 406 roughly.Side 403 bends along broken line 405, and side 403 generally perpendicularly erects with respect to bottom surface 402 thus.In in the time that side 403 vertically erects, bottom surface 402 is bent into bridge shape as described above, thereby can improve aesthetic appearance and rigidity.And, can do one's utmost to make the packaging bag with temperature to separate with ground plane, the heat that therefore can improve the heat retaining property of packaging bag and can suppress packaging bag passes to and place is set and makes place is set and become the condition of high temperature.

In addition, a side 403 has and the protuberance 414 of joint-cutting 415 tablings of being located at another side 403.Protuberance 414 is located at respectively the two ends of side 403, is the shape of protruding towards bottom surface 402 that does not circumferentially stretch out on edge after assembling.The joint-cutting of being located at the position corresponding with protuberance 414 415 of another side 403 is made as in the mode that can easily insert for protuberance 414 circular-arc that relative bottom surface 402 tilts.And, be provided with broken line 413 in the position adjacent with protuberance 414 along the direction vertical with respect to bottom surface 402.Thus, also can easily make protuberance 414 and joint-cutting 415 tablings when circular-arc being assembled into.When the comfortable side 403 of protuberance 414 erects, joint-cutting 415 is inserted in the outside of overlapping side 403, and protuberance 414 is fixed to the interior side-prominent mode of side 403 with front end.

Figure 19 is the birds-eye view of bag accommodating container 400 for the microwave of present embodiment.Two ends on the length direction of bottom surface 402 with substantially elliptical have the hole 421 that bottom surface 402 is separated with side 403.The straight line portion 411 of 421You bottom surface, hole 402 and the circular-arc part of side 403 divide formation, for roughly semicircle.According to this structure, side 403 can bend easily, can easily make protuberance 414 and joint-cutting 415 tablings.

At this, the packaging bag of the microwave bag accommodating container 400 that is accommodated in present embodiment is described.Figure 20 is the figure that represents the structure example of the packaging bag 31 of present embodiment, is in packaging bag 31, to be accommodated with content 40 and to seal opening and the block diagram of airtight packaging bag 31.

The packaging bag 31 of present embodiment has the sealing 34,27,28 that forms sealing between the circumference of film of upper surface part 32 and the circumference of the film of formation lower surface portion 33 and form.

The packaging bag 31 of present embodiment has the substantial middle portion that makes sealing 34 and is V word sigmoid roughly outstanding and row's vapor seal portion 35 of forming and adjacent with row vapor seal portion 35 and be formed on the unsealing portion 36 in the outside of row vapor seal portion 35 in unencapsulated mode towards the interior side direction of packaging bag 31, rise and packaging bag 31 while expanding at the internal pressure of packaging bag 31, stress concentrates on the vapor seal portion 35 of arranging, thereby peel off and opening from row vapor seal portion 35, region and unsealing portion 36 by this opening form the steam discharge portion of discharging for the steam in packaging bag 31.

The packaging bag 31 of present embodiment be configured to there is lower surface portion 33, with the overlapping upside upper surface part 32a of the upside of lower surface portion 33 and the downside upper surface part 32b overlapping with the downside of lower surface portion 33.The packaging bag 31 of present embodiment utilizes upside upper surface part 32a and downside upper surface part 32b to form upper surface part 32.

In the packaging bag 31 of present embodiment, will be between the both side edges of lower surface portion 33 and the both side edges of upper surface part 32 heat-sealing get up and form the part of side seals 37.And, three lateral margins of three lateral margins of lower surface portion 33 and upside upper surface part 32a are sealed and form a part and the end seal portion 38 of side seals 37.And, by upside upper surface part 32a and downside upper surface part 32b turn back, overlapping and seal and form film and close portion 39.

Film closes the central portion of portion 39 on its length direction to be had towards the interior side direction of packaging bag 31 and is row's vapor seal portion 35 of roughly giving prominence to V word sigmoid, and, there is the banded sealing 34 at the edge on edge and the Width on the length direction that closes portion 39 along film in the both sides of this row's vapor seal portion 35.Row vapor seal portion 35 and banded sealing 34 part for upside upper surface part 32a and downside upper surface part 32b are sealed overlappingly, row vapor seal portion 35 links with banded sealing 34.

Film closes portion 39 and has unsealing portion 36 in the outside of row vapor seal portion 35.Serve as reasons sealing 34 that upside upper surface part 32a and downside upper surface part 32b are sealed overlappingly and row vapor seal portion 35 is that surround, the not part of heat-sealing in outside of unsealing portion 36.Row's vapor seal portion 35 of present embodiment is configured to towards the interior side direction of packaging bag 31 and is the roughly bending also outstanding shape of V-shape.

Row vapor seal portion 35 forms by heat-sealing, have with unsealing portion 36 non-conterminous by packaging bag 31 inner sides be the outstanding inside bend shape of V word and adjacent with the unsealing portion 36 outside curve shape by packaging bag 31 outsides, the front of row vapor seal portion 35 is narrower.Therefore, in the time that internal pressure rising, the packaging bag 31 of packaging bag 31 expand, only arrange the front of vapor seal portion 35 and peel off and opening, form the steam discharge portion of discharging for the aqueous vapor in packaging bag 31 etc. by region and the unsealing portion 36 of this opening.And the aqueous vapors in packaging bag 31 etc. certainly this steam discharge portion are discharged to outside.Thus, even if the internal pressure of packaging bag 31 rises, packaging bag 31 expands, the aqueous vapor in packaging bag 31 etc. is also discharged to outside from steam discharge portion, therefore can prevent that packaging bag 31 from breaking.

Figure 21 is the figure that represents the embodiment of the microwave bag accommodating container 400 of one embodiment of the present invention.As shown in figure 21, above-mentioned microwave is assembled into one by the mode that bag accommodating container 400 and packaging bag 31 are exposed from the opening 404 of microwave bag accommodating container 400 with row's vapor seal portion 35 of packaging bag 31.In addition, Figure 22 represents the state that microwave bag accommodating container 400 and packaging bag 31 are expanded by microwave-oven-heating, (a) of Figure 22 represents the block diagram of microwave with bag accommodating container 400 and packaging bag 31, and (b) of Figure 22 represents the lateral plan of microwave with bag accommodating container 400 and packaging bag 31.

As shown in figure 21, taking microwave with the bottom surface 402 of bag accommodating container 400 as below, the opening 404 of side 403 is as the mode of top is from the opening 404 collecting bags packs 31 of microwave bag accommodating container 400, can make thus packaging bag 31 erect.Microwave also can suitably utilize known lining cement etc. to bond together with bag accommodating container 400 and packaging bag 31.Row's vapor seal portion 35 of packaging bag 31 is the top side of opening 404 with bag accommodating container 400 than microwave, therefore arranges vapor seal portion 35 and can not blocked by microwave bag accommodating container 400.

In the time utilizing micro-wave oven to heat the packaging bag 31 of air-tight state, at interior generation aqueous vapor of packaging bag 31 etc., and become the state of high temperature, high pressure, packaging bag 31 is expanded.So, as shown in figure 22, the horizontal profile of the base portion being made up of lower surface portion 33 and upper surface part 32 of packaging bag 31 expands becomes ellipse, and by film close row's vapor seal portion 35 of portion 39, banded sealing 34 is divided the space forming and is expanded.Thus, power intensively acts on and forms film and close the part of the front end of row's vapor seal portion 35 of portion 39, the part of heat-sealing is peeled off from the front end of row vapor seal portion 35, the front opening of row vapor seal portion 35, forms the steam discharge portion of discharging for the aqueous vapor in packaging bag 31 etc. by region and the unsealing portion 36 of this opening.Thus, can discharge from steam discharge portion at the aqueous vapor of packaging bag 31 interior generations to outside etc.

Adopt present embodiment, packaging bag 31 is accommodated in microwave bag accommodating container 400 by the mode of exposing with bag accommodating container 400 from microwave with row's vapor seal portion 35 of at least packaging bag 31, with this state, content 40 is heated, do not need thus the temperature of waiting for content thing reduce just can be taking microwave bag accommodating container 400 as handle from microwave oven safety take out, and, the cut out portion 41 that is formed in the top of packaging bag 31 by idiomorphism is cut bag, can make packaging bag 31 and microwave bag accommodating container 400 keep erecting the directly edible content in state ground.

In addition, for the packaging bag 31 of present embodiment, the row's vapor seal portion 35 that is used to form steam discharge portion is located at than the film of the top location of upper surface horizontal surface of the content 40 in packaging bag 31 and closes portion 39, therefore can prevent that content 40 in packaging bag 31 from being blown spills, and can prevent that the content 40 in packaging bag 31 from leaking.

In addition, the microwave of present embodiment is not limited to present embodiment with bag accommodating container 400, as long as at least row's vapor seal portion 35 of packaging bag 31 exposes with bag accommodating container 400 from microwave, for example, in the case of microwave with the height of side of bag accommodating container 400 with the height of packaging bag 31 is identical or height higher than packaging bag 31, microwave with bag accommodating container 400 can suitably adopt by than arranging the top side of vapor seal portion 35, a part of excising corresponding position is with the shape that makes it possible to discharge steam and form etc.

(example 2 of the 4th embodiment)

The microwave of present embodiment with bag accommodating container 51 after packaging bag 31 is received, for example can be with flat condition by microwave-oven-heating, afterwards, after micro-wave oven takes out, can indulge immediately and put and easily take out content, convenience is improved, and such container is described.(a) of Figure 23 is the block diagram of the folded state of the microwave bag accommodating container 51 that represents present embodiment, and (b) of Figure 23 is the arrow A-A line cutaway view in (a) of Figure 23.

As shown in figure 23, microwave is made up of container body 52 and end member 53 with bag accommodating container 51, this container body 52 can be by being launched into tubular by the direction pushing towards each other of the lateral margin of both sides under folded state, this end member 53 is located at the bottom of this container body 52, bottom surface is formed as to end member 53 and also folds in linkage and launch with the folding and expansion of container body 52.

Said vesse main body 52 is used ground paper, the such sheet material of synthetic resin sheet material, as Figure 24 (a), there are two sidewalls 54, this two side 54 is adjacently formed by a slice sheet material at a lateral margin, two side 54 is in broken line 55 places doubling overlapping, it is fixing that another lateral margin utilizes adhesive sheet 56 to be bonded to each other, thereby can under flat folded state, be launched at a touch tubular by pushing both side edges.

The lower ora terminalis of the two side 54 of this container body 52 is formed as the horizontal linear edge substantially vertical with respect to the upper lower axis of container body 52.The outstanding banded connecting strap 57 being connected with end member 53 being to downward-extension shape that is provided with of middle position on the Width of the lower ora terminalis of above-mentioned two side 54.

The material of member of the above-mentioned end 53 adopts the sheet material same with container body 52, as shown in Figure 24 (b), the broken line 61 connected a pair of diapires 62 that clip linearity are formed as launching to both sides from the state of doubling, two diapires 62 are to be the tabular of the outstanding edge that is circular-arc with the outer rim of the contrary side of broken line 61 linearly, two diapires 62 be the length that can be accommodated between the both side edges of the container body 52 under folded state along the length setting in the direction of broken line 61, under doubled state, broken line 61 sides are positioned at the inner side of container body 52, a part for diapire 62 is outstanding laterally from the lower edge of sidewall 54, member of the above-mentioned end 53 is accommodated in container body 52 with this configuration mode.

On two diapires 62 of member of the above-mentioned end 53, on broken line 61, be provided with central slotted hole 63, and clip broken line 61 and with broken line 61 leave equidistant position with the configuration mode of parastate be provided with outside slotted hole 64, under the state launching at end member 53, the banded connecting strap 57 being connected with the lower edge of each sidewall 54 of container body 52 from top through outside slotted hole 64, in the lower surface bending of diapire 62, the leading section of this connecting strap 57 bends in the mode of passing central slotted hole 63 from below, thereby sidewall 54 and diapire 62 are linked up.

The microwave of present embodiment is structure as described above with bag accommodating container 51, in the time keeping flat use, as shown in Figure 23 (a) and Figure 23 (b), container body 52 is folding in the overlapping mode in two side 54, end member 53 is clamped by the bottom between two side 54 with doubled state, and entirety is flat pattern.Under this state, be located at connecting strap 57 bending to the inside due to the doubling of end member 53 of two side 54.

Figure 25 is the block diagram that represents that microwave bag accommodating container 51 and packaging bag 31 one keep flat.Microwave is received by the mode that between bag accommodating container 51 and packaging bag 31, the row's vapor seal portion with at least packaging bag 31 exposes from microwave bag accommodating container 51.The packaging bag 31 being contained can be used known lining cement etc. to be fixed on a microwave bag accommodating container 51.

The microwave use bag accommodating container 51 of present embodiment for example, when by microwave-oven-heating content 40, is put into micro-wave oven by packaging bag 31 in the mode keeping flat, and therefore overturning etc. can not occur in the time of microwave heating, can stably in microwave, heat.And, in the time that micro-wave oven takes out, yet can not worry to be burned etc. ground with bag accommodating container 51 and take out bag accommodating container 51 and packaging bag 31 for microwave by controlling microwave.

And, for bag accommodating container 51 and packaging bag 31 for the microwave taking out from micro-wave oven, can use by pressing microwave the lateral margin of bag accommodating container 51, and make at a touch two diapires 62 of end member 53 launch like that as shown in figure 26, can easily indulge and put.Afterwards, by the top excision of packaging bag 31, thereby can easily take out content 40, the convenience while making to eat is improved.

Adopt present embodiment, after microwave uses bag accommodating container 51 and packaging bag 31 with flat condition heating, microwave can easily be indulged and put with bag accommodating container 51 and packaging bag 31, therefore can not worry to scald etc., can after heating, eat immediately content 40.

In addition, above-mentioned embodiment is the preferred embodiment of the present invention, and scope of the present invention is not limited only to above-mentioned embodiment, in the scope that does not depart from main idea of the present invention, can implement the present invention with the embodiment that has carried out various changes.

Technology described in above-mentioned the 1st embodiment～4th embodiment can suitably combine.For example, in the 2nd embodiment, the 3rd embodiment, also can make the sealed width of sealed width and the 1st embodiment is similarly taper, also can adopt the polygon unsealing portion as the 1st embodiment, the 2nd embodiment in the 3rd embodiment.

description of reference numerals

100,200,300, packaging bag; 6, film closes portion; 7, row vapor seal portion; 101, the 1st steam discharge portion; 102, the 2nd steam discharge portion; 2a2, the 1st printed layers; 2a3, the 2nd printed layers; 400, container; 31, packaging bag; 35, row vapor seal portion.

Claims

1. a packaging bag, is characterized in that,

This packaging bag has row vapor seal portion, and this row's vapor seal portion is that the part by making the sealing that is pasted with film is also given prominence to and formed to the interior side direction bending of packaging bag,

The peel strength of at least a portion of above-mentioned row's vapor seal portion than the peel strength of the part except an above-mentioned part of above-mentioned row's vapor seal portion a little less than, while peeling off under the effect of vapour pressure, the part except an above-mentioned part of above-mentioned row's vapor seal portion is residual and form edge part, sounds along with row's steam.

2. packaging bag according to claim 1, is characterized in that,

An above-mentioned part is bending central leading section.

3. packaging bag according to claim 1 and 2, is characterized in that,

Above-mentioned peel strength is according to the size of sealed width and difference.

4. according to the packaging bag described in any one in claim 1～3, it is characterized in that,

Above-mentioned row's vapor seal portion is located at the portion that closes bending, overlapping mode forms.

5. according to the packaging bag described in any one in claim 1～4, it is characterized in that,

The sealed width that is linked to the link sealing at the two ends of above-mentioned row's vapor seal portion is along with the taper that becomes large is gone in the position at the two ends from above-mentioned row's vapor seal portion towards sidepiece.