JPH0885579A - Retortable pouch compatible with electronic oven - Google Patents

Abstract

PURPOSE: To prevent pressurized or heated foods, contained in a pouch, from drying or decaying during distribution or storage stage and to enable uniform and quick heating, providing foods of soft and good taste, in an electronic oven without causing the pouch to burst due to its expansion. CONSTITUTION: In a hermetically sealed pouch, one end 4c of a tape 4 of an air-permeable material is sealed to the internal surface of a laminated film constituting the pouch and the other end 4a of the tape 4 is sealed to the internal surface of the other laminated film, and the shorter sides of the tape 4 are sealed to the both laminated films, thereby providing a retortable pouch compatible with an electronic oven.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven compatible retort pouch, and more particularly to a microwave oven compatible retort pouch having a breathable tape that allows water vapor generated inside the bag to be transmitted to the outside of the bag by high frequency heating by a microwave oven.

[0002]

2. Description of the Related Art In recent years, a large number of microwave oven pouches have been produced and used due to the development of food processing technology and packaging technology and the spread of microwave ovens.

Here, the microwave oven vibrates water molecules and the like contained in food by irradiation of high frequency (ultra-short wave), and heats food by frictional heat generated by the vibration of the water molecules. Water vapor is generated due to the high frequency heating by the microwave oven, and the water vapor causes a normal sealed bag formed of a plastic film to expand and burst.

Therefore, in the conventional pouch for a microwave oven, in order to discharge the water vapor generated inside the bag to the outside of the bag by the high frequency heating of the microwave oven, a part of the pouch body is opened at the time of heating or the pouch body is penetrated. Make a hole or open a steam control hole and seal the steam control hole with an adhesive seal, and peel off the seal before heating, or if the steam pressure inside the pouch body increases due to heating, it will be easy I was trying to open the seal or the valve.

However, among the pouches for microwave ovens,
For those that open a part of the pouch body before putting it in the microwave oven, it takes time and effort to open it,
In the case where the pouch body is provided with a through hole, the stored contents are always in contact with the outside air, so there is a problem in storage and distribution. Also, in the case where the seal is peeled off before heating, since there is usually only one seal part, the escape of water vapor may be insufficient, and there is a sanitary problem because the adhesive of the seal part comes into contact with food. However, there is also a drawback that a special machine for attaching the seal is required. On the other hand, in the case where the seal portion opens due to vapor pressure, it is difficult to adjust the sticking strength of the seal, and the seal portion may open during the distribution stage. Further, in the case of a valve that opens, it is necessary to prepare a separate valve and attach it.

Therefore, the applicant of the present application has filed in FIG. 13 and FIG.
As shown in Fig. 4, a pouch for a microwave oven has been developed and put into practical use, which has a non-woven fabric that allows water vapor generated inside the bag to be transmitted to the outside of the bag by high-frequency heating of the microwave oven (Japanese Patent Application No. 3-26766).

13 and 14, the pouch 10 for a microwave oven has an envelope type structure, and the film 20 is arranged so that both side edges 20h and 20i of the rectangular film 20 face each other with a slight gap. Both sides 20h and 20i of the film 20 which are folded and overlapped with each other with the space therebetween are opposed to each other.
A slightly wider strip-shaped non-woven fabric 30 is arranged inside both side edges 20h, 20i of the film 20, and both side edges 20h, 20i of the film 20 and both side edges 30h, 30 of the non-woven fabric 30.
It is formed by heat-sealing i and heat-sealing the bottom surface 20j. The opening 20k of the microwave pouch is heat-sealed and sealed after containing frozen food or the like.

Since the conventional microwave oven pouch 10 having the above-mentioned structure has the portion of the non-woven fabric 30, the water vapor generated inside the bag by the high frequency heating of the microwave is transmitted from the portion of the non-woven fabric 30 to the outside of the bag. Yes, so that inflation of the bag does not cause the bag to burst. Also, non-woven fabric 3
0 does not allow bacteria and the like to pass through during the distribution stage and storage stage.

[0009]

However, in the above-mentioned conventional pouch for a microwave oven, the moisture inside the bag evaporates through the portion of the non-woven fabric 30 during the distribution stage and the storage stage, so that the contents such as frozen foods may be lost. There is a problem that it may be dried. Further, there is a drawback that it is difficult to control the vapor escape because the non-woven fabric has not been sufficiently studied.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to prevent moisture from evaporating through the nonwoven fabric portion at the distribution stage and the storage stage, and to keep the contents in the outside air. An electronic device that can heat the contents evenly and fluffy in a microwave oven in a short time without touching the food, and therefore the pressurized / heated food that is the contents does not dry or rot. It is to provide a retort pouch for a microwave oven.

[0011]

To achieve the above object, a microwave oven-compatible retort pouch according to the present invention is a sealed bag body formed of a laminated film having a front surface layer and a back surface layer each made of a heat resistant plastic film. And a breathable material tape made of a heat-resistant non-woven fabric and disposed inside the bag, the breathable material tape having one side edge along one side of the inside of the bag along the opening direction of the bag. The back side layer is sealed and the other side edge is sealed to the back side layer on the other side inside the bag along the opening direction of the bag, and the remaining both side edges of the breathable material tape are inside the bag. With a structure in which each of the opposite back surface layers is sealed,
Further, the second aspect of the microwave oven-compatible retort pouch of the present invention, each is a sealed bag body having an opening at one end formed of a laminated film having a front surface layer and a back surface layer made of a heat-resistant plastic film, And a breathable material tape made of a heat-resistant nonwoven fabric and disposed inside the bag, the breathable material tape having one side edge along the opening inside the bag and on one surface of the back surface layer. The back surface being sealed and having the other side edge sealed along the opening to the other surface of the back surface layer inside the bag, and the remaining both side edges of the breathable material tape facing inside the bag. The third embodiment of the microwave oven-compatible retort pouch according to the present invention has a front layer and a back layer each made of a heat-resistant plastic film. A sealed bag body formed of a layered film and having an opening at one end, and an inner end of the bag made of a heat-resistant non-woven fabric, the end being opposite to the end provided with the opening. And a breathable material tape having one side edge sealed along the opening to one surface of the backside layer inside the bag and along the opening. The other side edge is sealed to the other surface of the back surface layer inside the bag, and the remaining both side edges of the breathable material tape are sealed between the opposite back surface layers inside the bag, respectively. A fourth aspect of the microwave oven-compatible retort pouch of the present invention is a sealed bag body having an opening at one end, which is formed of a laminated film each having a surface layer and a back surface layer made of a heat-resistant plastic film, And a breathable material tape made of a thermal non-woven fabric and disposed inside the bag, the breathable material tape having one side edge in a direction intersecting with the opening on the one surface of the back surface layer inside the bag. The other side edge that is sealed and that intersects the opening is sealed to the other surface of the back layer inside the bag, and the remaining one side edge of the breathable material tape faces inside the bag. Each of the back surface layers is sealed, and the opening is formed on the other side edge of the breathable material tape.

In these microwave oven-compatible retort pouches of the present invention, the laminated film may be, if necessary, from the surface layer to a stretched nylon film / polyvinylidene chloride resin layer or polyethylene-vinyl alcohol copolymer resin layer / no layer. The heat-resistant non-woven fabric forming the breathable material tape has a layered structure in which stretched polypropylene films are laminated in this order, and a polyester-based non-woven fabric made of polypropylene fiber, a non-woven fabric made of polyethylene fiber and a polyester fiber formed by coating polyester fiber with high-density polyethylene. One of the spunbond nonwoven fabrics is used.

[0013]

In the retort pouch for microwave oven of the present invention having the above-mentioned structure, the breathable material tape made of non-woven fabric is disposed inside the bag, and since the breathable material tape does not come into contact with the outside air, it can be distributed or stored. In the step, water does not evaporate through the breathable material tape portion, and therefore the pressurized and heated food as the content does not dry or spoil.

A microwave oven-compatible retort pouch according to the present invention will be described in detail below with reference to the drawings. 1 is a plan view showing a first embodiment of a microwave oven-compatible retort pouch of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG.

As shown in FIGS. 1 and 2, this microwave oven-compatible retort pouch has a sealed bag body 3 formed of a laminated film 2 having a front surface layer and a back surface layer, each of which is made of a heat resistant plastic film, and a heat resistant bag. And a breathable material tape 4 which is made of a non-woven fabric and is disposed inside the bag.

The laminated film 2 which is a material for forming the sealed bag body 3 is composed of at least a front surface layer and a back surface layer. Here, the front surface layer is a layer having a function or function as a base material layer, and the back surface layer is a layer having a function or function as a seal layer.

As a material for forming the surface layer, for example, a stretched polyethylene terephthalate film, a stretched nylon film, a stretched polypropylene film or the like is preferable, and a barrier layer such as a polyvinylidene chloride resin layer or a polyethylene-vinyl alcohol copolymer resin layer is laminated. The stretched polyethylene terephthalate film or stretched nylon film is more preferable. Stretched polyethylene terephthalate film, stretched nylon film, stretched polypropylene film and the like have good printability and heat resistance, and stretched polyethylene in which a barrier layer such as a polyvinylidene chloride resin layer or a polyethylene-vinyl alcohol copolymer resin layer is laminated. This is because a terephthalate film or a stretched nylon film can have more barrier properties. Further, when it is desired to impart a barrier property to the sealed bag body 3, for example, a laminated film obtained by laminating a barrier film such as a silica vapor deposition film, an alumina vapor deposition film, a magnesium oxide vapor deposition film or a saran film as an intermediate layer is used. Good.

As the material for forming the back surface layer, for example, linear low-density polyethylene or unstretched polypropylene film is suitable. This is because these have excellent sealing properties.

Furthermore, a film formed by laminating a uniaxially stretched film which is easy to tear in parallel with the end portion where the breathable material tape 4 made of a heat-resistant nonwoven fabric is arranged as the laminated film 2 which is the forming material of the sealed bag body 3. By using it, it is possible to extremely easily open the sealed bag body 3.

The films forming the laminated film 2 can be adhered to each other by dry lamination or the like. As the heat-resistant non-woven fabric constituting the breathable material tape 4, for example, polypropylene fiber non-woven fabric, polyethylene fiber non-woven fabric, and polyester spun-bonded non-woven fabric formed by coating polyester fiber with high-density polyethylene are suitable. This is because these are excellent in heat resistance, and when used in a retort pouch compatible with a microwave oven, water vapor escapes appropriately. In the retort pouch compatible with the microwave oven of the present invention, since the air-permeable material tape 4 does not come into contact with the outside air at the time of distribution, it is not necessary that the bacteria do not pass through. However, the breathable material tape 4 preferably has heat seal layers formed on both surfaces thereof.

As a combination of the materials for forming the sealing bag body 3 and the air-permeable material tape 4, considering the heat-sealing properties of both, as shown in FIG.
Laminated film 2 comprising stretched nylon film 5 / polyvinylidene chloride resin layer or ethylene-vinyl alcohol copolymer resin layer 6 / non-stretched polypropylene film 7
And a non-woven fabric made of polypropylene fiber are preferred.

As shown in FIGS. 1 and 2, in this microwave oven compatible retort pouch 1, the breathable material tape 4 has a side edge 4a sealed along one side of the inside of the bag along the opening direction of the bag. The other side edge 4c is sealed to the back surface layer of the body 3 along the opening direction of the bag, and the other side edge 4c is sealed to the back surface layer of the sealed bag body 3 on the other surface of the inside of the bag, and the breathable material tape 4 remains. Both side edges 4b, 4d are sealed between the back surface layers of the sealed bag body 3 facing each other inside the bag.

Since the breathable material tape 4 has a strip shape, when the side edges 2b and 2d of the laminated film 2 are heat-sealed, at the same time, the breathable material tape 4 is formed.
Both side edges 4b, 4d can be heat-sealed between the laminated films 2 facing each other.

One end 3a of the sealed bag body 3 is formed so that it can be opened. With this configuration, when the microwave oven-compatible retort pouch 1 is used in a microwave oven, it is possible to open the breathable material tape 4 at the end portion 3a to expose the outer surface portion of the breathable material tape 4 for use.

In order to open one end 3a of the sealed bag body 3, it is preferable to form a notch 8 on the side edge of the end 3a of the sealed bag body 3, for example. By forming such a notch 8, the microwave oven compatible retort pouch 1 can be easily opened from the notch 8. Further, the end portion 3a of the sealed bag body 3 may be peelably sealed by an easy peel seal, or a perforation may be formed inside the sealed portion of the end portion 3a of the sealed bag body 3. In FIG. 2, reference numeral 40 is the contents.

In the retort pouch 1 for a microwave oven of the present invention having the above-mentioned structure, the outer surface portion of the air-permeable material tape 4 made of the heat-resistant nonwoven fabric does not come into contact with the outside air in the unopened state, so that it is in a distribution stage. The moisture does not evaporate through the air permeable material tape 4 in the storage step,
Therefore, the pressurized and heated food, which is the content, is not dried or spoiled. Further, since the water vapor escapes moderately, the contents are moderately pressed during heating by the microwave oven, so that the contents can be uniformly and plumply delicious and can be heated in a short time.

When used in a microwave oven, since the outer surface of the air-permeable material tape 4 is exposed by opening the end 3a of the sealed bag body 3, the bag is heated by high-frequency heating of the microwave oven. The water vapor generated inside penetrates from the portion of the air permeable material tape 4 to the outside of the bag, so that the bag does not expand and therefore the bag does not burst.

The present invention is not limited to the above-mentioned first aspect, and can be implemented by appropriately modifying it.
For example, the breathable material tape 4 is not necessarily the sealing bag body 3
Need not be arranged in the longitudinal direction, but may be arranged in the lateral direction.

The sealed bag body 3 is not limited to the one formed by the two laminated films 2, but is formed by, for example, side-sealing, two-way sealing, three-way sealing one sheet of the laminated film 2. It may be one.

Next, a second embodiment of the microwave oven-compatible retort pouch of the present invention will be described with reference to the drawings. FIG. 4 is a plan view schematically showing a second embodiment of the microwave oven-compatible retort pouch of the present invention.

As shown in FIG. 4, in this embodiment, the band-shaped breathable material tape 4 made of a heat-resistant nonwoven fabric has one side edge 4c on the side far from the opening 3A of the sealing bag body 3 along the opening 3A. Is sealed on one surface of the back surface layer of the laminated film 2 forming the inside of the bag and has an opening 3A.
Both side edges 4b, 4d in the direction intersecting with the sheet are sealed between the laminated films 2 on both sides forming the sealed bag body 3. The remaining one side edge of the strip-shaped breathable material tape 4, that is, the side edge 4a on the side closer to the opening 3A of the sealed bag body 3, constitutes the inside of the bag after the contents are inserted from the opening 3A. The other surface of the back surface layer of the film 2 is sealed, and the opening 3A is further sealed.

The other points are the same as those of the microwave oven-compatible retort pouch of the first embodiment described above. Further, in the microwave oven-compatible retort pouch of the second aspect, as shown in FIGS. 5 and 6, the side edge 3c of the bag on the side facing the opening 3A of the sealed bag body 3 may be sealed. .

Further, in the microwave oven-friendly retort pouch of the second aspect, as shown in FIGS. 7 and 8, the portion (bottom of the bag) of the sealed bag body 3 opposite to the opening 3A is a gusset. The configuration may be the folded portion 3C.
FIG. 7 shows a gusset folded portion 3C using a plurality of laminated films 2.
FIG. 8 shows a case where a single laminated film 2 is gusset-folded to form a gusset-folded portion 3C.

Next, a third embodiment of the microwave oven-compatible retort pouch of the present invention will be described with reference to the drawings. 9 is a plan view showing an outline of a third embodiment of the microwave oven-compatible retort pouch of the present invention, and FIG. 10 is a sectional view taken along line IX-IX of FIG.

As shown in FIGS. 9 and 10, in this embodiment, the breathable material tape 4 made of a heat resistant nonwoven fabric is used.
An opening 3A for inserting the contents is provided in addition to the portion where the is arranged. That is, the strip-shaped breathable material tape 4 is
One side edge thereof is sealed to one surface of the back surface layer of the laminated film 2 forming the inside of the bag along the opening 3A, and the other side edge 4c is formed along the opening A and the other surface inside the bag. And the remaining side edges 4b and 4d of the breathable material tape 4 are sealed between the opposite back surface layers of the sealing bag body 3 inside the bag.

The microwave oven-compatible retort pouch of the third aspect is used by inserting the contents from the opening 3A for inserting the contents and then sealing the opening 3A. The other points are the same as those of the microwave oven-compatible retort pouch of the first aspect described above.

Next, a fourth mode of the microwave oven-compatible retort pouch of the present invention will be described with reference to the drawings. FIG. 11: is a top view which shows the outline of the 4th aspect of the retort pouch corresponding to the microwave oven of this invention.

As shown in FIG. 11, in this embodiment,
The strip-shaped breathable material tape 4 made of heat-resistant nonwoven fabric is sealed at one side edge 4c in the direction intersecting the opening 3A of the sealed bag body 3 with one surface of the back surface layer of the laminated film 2 forming the inside of the bag. And the other side edge 4a in the direction intersecting the opening 3A is sealed to the other side of the back surface layer, and the remaining one side edge 4d of the breathable material tape 4 is sealed between the opposite back surface layers inside the bag. Has been done. The opening 3A is formed on the other side edge 4b side of the breathable material tape 4.

In the retort pouch for microwave ovens according to the fourth aspect, after the contents are inserted through the opening 3A for inserting the contents, the opening 3A is sealed and at the same time, the side edge 4b of the breathable material tape 4 is sealed. The laminated films 2 forming the bag body 3 are sealed and used.

In the microwave oven-compatible retort pouch of the fourth aspect, as shown in FIG. 12, the side edge 3b of the sealed bag body 3 may be sealed. In addition,
Other points are the same as those of the microwave oven-compatible retort pouch of the first embodiment described above.

[0041]

EXAMPLES Example 1 As shown in FIG. 4, a biaxially stretched nylon film coated with a polyvinylidene chloride resin layer (thickness: 15
μm) and a polyvinylidene chloride resin layer surface of a surface base material made of a non-stretched polypropylene film (thickness 70 μm) are dry-laminated, and a laminated film 2 having a width of 500 mm is half-folded so that the seal layer is on the inside. Width of 30mm made of polypropylene non-woven fabric,
The breathable material tape 4 having a basis weight of 80 g / m ² is sandwiched between the half-folded laminated films 2 to form the breathable material tape 4
1 side edge 4c and one sealing layer of the laminated film 2 are sealed, and then both side edges 3b and 3d of the sealing bag body are two-side sealed to form both short side edges 4 of the band-shaped breathable material tape 4.
b and 4d were heat-sealed between the laminated films 2. The sealing width was 5 to 10 mm, the tape sealing temperature was 190 ° C., and the sealing time was 0.2 seconds. Finally,
A size of 250 mm × 250 having an opening 3A formed by cutting the outer sides of both side edges 3b and 3d of the sealed hermetic bag body 3.
mm retort pouch 1 for microwave oven was manufactured.

In the microwave oven-compatible retort pouch 1, corn dipped in 10% by weight saline for 2 seconds was placed, and the opening 3A was heat-sealed and vacuum packaged at the same time, and then the package was placed in a retort kettle. Pressurization and heating were performed at 2.0 atm and 115 ° C. for 60 minutes.

After cooling sufficiently, the opening 3A of the retort pouch 1 for microwave oven is opened to make the air-permeable material tape 4
Was exposed and heated in a microwave oven of 600 W for 5 minutes and 10 minutes. No bag breakage or fusion of the inner surface occurred in any of the pouches, and the escape of water vapor was complete. .

Further, a proper internal pressure is applied to the contents, and in a shorter time than in the case of using the conventional pouch for retort,
It was possible to heat the whole body in a fluffy state. Example 2 As shown in FIG. 9, a biaxially stretched nylon film coated with a polyvinylidene chloride resin layer (thickness 15
μm) and a polyvinylidene chloride resin layer surface of a surface base material made of an unstretched polypropylene film (thickness 70 μm) are dry-laminated, and a laminated film 2 having a width of 500 mm is half-folded so that the seal layer is on the inner side. Width of 30mm made of polypropylene non-woven fabric,
The breathable material tape 4 having a basis weight of 80 g / m ² is sandwiched between the half-folded laminated films 2 to form the breathable material tape 4
The one side edge 4c and one sealing layer of the laminated film 2 are sealed, and the other sealing layer of the laminated film 2, the other side edge 4a of the breathable material tape 4 and the side edge 3a of the sealing bag body 3 are sealed. did. Next, the side edge 3 of the sealed bag body 3
b and 3d were sealed on both sides, and both short side edges 4b and 4d of the breathable material tape 4 were heat-sealed between the laminated films 2. The sealing width was 5 to 10 mm, the tape sealing temperature was 190 ° C., and the sealing time was 0.2 seconds. Finally, the half-folded portion was cut to form an opening 3A, and the outer sides of both side edges 3b and 3d of the sealed hermetically sealed bag body 3 were cut to manufacture a microwave oven-compatible retort pouch 1 having a size of 250 mm × 250 mm. .

Into the microwave oven-compatible retort pouch 1, corn dipped in 10 wt% saline for 2 seconds was placed, and the opening 3A was heat-sealed and vacuum packaged at the same time, and then the package was placed in a retort kettle. Pressurization and heating were performed at 2.0 atm and 115 ° C. for 60 minutes.

After cooling sufficiently, the opening 3A of the retort pouch 1 for microwave oven is opened to make the air-permeable material tape 4
Was exposed and heated in a microwave oven of 600 W for 5 minutes and 10 minutes. No bag breakage or fusion of the inner surface occurred in any of the pouches, and the escape of water vapor was complete. .

Furthermore, a proper internal pressure is applied to the contents, and in a shorter time than in the case where a conventional pouch for retort is used,
It was possible to heat the whole body in a fluffy state. Example 3 As shown in FIG. 11, a biaxially stretched nylon film coated with a polyvinylidene chloride resin layer (thickness 1
(5 μm), a non-stretched polypropylene film (thickness 70 μm) on the surface of the polyvinylidene chloride resin layer of the surface substrate.
500 mm wide with a dry laminated seal layer
Half-folded so that the sealing layer is on the inside, and a width of 30 mm formed of polypropylene non-woven fabric,
The breathable material tape 4 having a basis weight of 80 g / m ² is sandwiched between the half-folded laminated films 2 to form the breathable material tape 4
One side edge 4c of the laminated film 2 and one sealing layer of the laminated film 2 are sealed, and the other sealing layer of the laminated film 2 and the other side edge 4a of the breathable material tape 4 are sealed, and further the sealing bag main body 3 The side edge 3d was sealed. Next, the side edge 3c of the sealing bag body 3 was sealed, and the shorter side edge 4d of the breathable material tape 4 was heat-sealed between the laminated films 2. The sealing width was 5 to 10 mm, the tape sealing temperature was 190 ° C., and the sealing time was 0.2 seconds. Finally, the outside of the side edge 3c of the sealed hermetic bag body 3 was cut to manufacture a retort pouch 1 for a microwave oven having a size of 250 mm × 250 mm.

In the microwave oven-compatible retort pouch 1, corn that had been immersed in 10% by weight saline for 2 seconds was placed, and the opening 3A was heat-sealed and vacuum packaged at the same time, and then this package was placed in a retort kettle. Pressurization and heating were performed at 2.0 atm and 115 ° C. for 60 minutes.

After sufficiently cooling, the microwave oven-compatible retort pouch 1 is opened to expose the air-permeable material tape 4, and then a microwave oven of 600 W is used for 5 minutes and 10 minutes.
After heating for one minute, neither pouch nor fusion of the inner surface occurred in any of the pouches, and water vapor was completely released.

Furthermore, a proper internal pressure is applied to the contents, and in a shorter time than in the case where a conventional pouch for retort is used,
It was possible to heat the whole body in a fluffy state.

[0051]

As is clear from the above description, according to the microwave oven-compatible retort pouch of the present invention,
Each has a sealed bag body formed of a laminated film having a surface layer and a back surface layer made of a heat-resistant plastic film, and a breathable material tape made of a heat-resistant nonwoven fabric and arranged inside the bag, and is unopened. Since the part made of the breathable material tape does not come into contact with the outside air in the state, moisture does not evaporate through the part of the breathable material tape at the distribution stage and the storage stage. The pressurized / heated food that is a product does not dry. In addition, the pressurized / heated food, which is the content, does not decompose.

Further, when heating in a microwave oven, the bag portion outside the breathable material tape is formed to be openable so that the outer surface portion of the breathable material tape is exposed. Since the water vapor generated inside the bag can be transmitted to the outside of the bag from the breathable material tape portion, the bag does not burst due to the expansion of the bag. Moreover, when the contents are heated in a microwave oven, a suitable pressure is applied to the contents, so that the contents are uniformly fluffy and delicious and can be heated in a short time.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a first embodiment of a microwave oven-compatible retort pouch of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an enlarged cross-sectional view schematically showing an example of a laminated film forming the sealed bag body of the present invention.

FIG. 4 is a plan view showing an example of a second mode of a microwave oven-compatible retort pouch of the present invention.

FIG. 5 is a plan view showing another example of the second embodiment of the microwave oven-compatible retort pouch of the present invention.

6 is a cross-sectional view taken along line VV of FIG.

FIG. 7 is a cross-sectional view showing another example of the second mode of the retort pouch for microwave oven of the present invention.

FIG. 8 is a cross-sectional view showing another example of the second mode of the microwave oven-compatible retort pouch of the present invention.

FIG. 9 is a plan view showing an example of a third aspect of the microwave oven-compatible retort pouch of the present invention.

10 is a sectional view taken along line IX-IX in FIG.

FIG. 11 is a cross-sectional view showing an example of a fourth mode of the microwave oven-compatible retort pouch of the present invention.

FIG. 12 is a plan view showing another example of the fourth mode of the microwave oven-compatible retort pouch of the present invention.

FIG. 13 is a plan view showing an example of a conventional microwave oven-compatible retort pouch.

14 is a sectional view taken along line XIII-XIII in FIG.

[Explanation of symbols]

 1 ... Microwave oven-compatible retort pouch 2 ... Laminated film 2a to 2d ... Laminated film side edge 3 ... Sealing bag body 3A ... Opening part 4 ... Breathable material tape 4a-4d ... Breathable material tape side edge

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sueda Yasuda 3-6-21 Kusune, Higashiosaka-shi, Osaka Nikko Gravure Printing Co., Ltd.

Claims (5)

[Claims] 1. A sealed bag body formed of a laminated film having a front layer and a back layer each made of a heat-resistant plastic film, and a breathable material tape made of a heat-resistant nonwoven fabric and arranged inside the bag. The breathable material tape has one side edge along the opening direction of the bag sealed to the back surface layer on one side of the inside of the bag and the other side edge of the bag along the opening direction of the bag. A retort pouch compatible with a microwave oven, characterized in that the other side of the inside is sealed to the back surface layer, and the remaining both side edges of the breathable material tape are sealed between the opposite back surface layers facing each other inside the bag. . 2. A sealed bag body, each of which is formed of a laminated film having a front surface layer and a back surface layer made of a heat resistant plastic film and has an opening at one end, and a heat resistant non-woven fabric disposed inside the bag. And a breathable material tape having one side edge sealed along the opening to one surface of the backside layer inside the bag and along the opening. The other side edge is sealed to the other surface of the back surface layer inside the bag, and the remaining both side edges of the breathable material tape are sealed between the opposite back surface layers inside the bag, respectively. Microwave-compatible retort pouch. 3. A sealed bag body formed of a laminated film each having a surface layer and a back surface layer made of a heat resistant plastic film and having an opening at one end, and an inside of the bag made of a heat resistant nonwoven fabric. And a breathable material tape disposed at an end opposite to the end provided with the opening, the breathable material tape having one side edge along the opening at the inside of the bag. Is sealed to one surface of the back surface layer, and the other side edge is sealed to the other surface of the back surface layer inside the bag along the opening, and the remaining both side edges of the breathable material tape. A retort pouch compatible with a microwave oven, characterized in that each is sealed between the opposite back surface layers inside the bag. 4. A sealed bag body, each of which is formed of a laminated film having a surface layer and a back surface layer made of a heat-resistant plastic film and has an opening at one end, and a heat-resistant non-woven fabric disposed inside the bag. And a breathable material tape, the one side edge of the breathable material tape in a direction intersecting the opening is sealed to one surface of the back surface layer inside the bag and intersects the opening. The other side edge in the direction is sealed to the other side of the back surface layer inside the bag, and the remaining one side edge of the breathable material tape is sealed between the opposite back surface layers inside the bag, respectively, and the opening is formed. A retort pouch compatible with a microwave oven, wherein a portion is formed on the other side edge side of the remaining breathable material tape. 5. The laminated film has a layer structure in which a stretched nylon film / a polyvinylidene chloride resin layer or a polyethylene-vinyl alcohol copolymer resin layer / a non-stretched polypropylene film are laminated in this order from the surface layer, and the breathability is The heat-resistant non-woven fabric forming the material tape is any one of a polypropylene fiber non-woven fabric, a polyethylene fiber non-woven fabric and a polyester spun-bonded non-woven fabric formed by coating polyester fibers with high density polyethylene. Microwave oven compatible retort pouch described in any of the above.