JP2001106270A - Packaging body for heat treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safe packaging body for heat treatment which is costless and capable of preventing the contents from flowing out even if the packaging body is held so as to turn the hut seam downward after release of pressure without greatly changing the pressure release structure or mechanism and without using special parts such as an opening/closing valve. SOLUTION: In a packaging body A whose hut seam part 4 where both sides are heat-sealed with each other by a specified width to form a hut seam is provided at a position shifted to one side, the hut seam part 4 is divided into an easily unsealable part 7 positioned at the contents side of the packaging body A and a complete seal part 8 connected to the easily unsealable part 7 and positioned at the outside of the packaging body A. An air passage 9 releasing the pressure in the body A to the outside is formed at a breadthwise appropriate position of the seal in the complete seal part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package for filling foods and the like, wherein the contents of the foods and the like can be heated and cooked by a microwave oven while the contents of the foods and the like are kept as packaged, and the package is prevented from being ruptured due to internal heating pressure. Also, the present invention relates to a heat-treating package that does not cause leakage of the content from a passage even if the content is in a liquid state, and even if the package is held with the joint joint facing downward after heating.

[0002]

2. Description of the Related Art Heretofore, there have been provided on the market a large number of packaged foods in which cooked or semi-cooked food is filled in a heat-resistant plastic packaging bag and cooked by a microwave oven immediately before eating. .

However, when this packaged food is heated by a microwave oven, the internal pressure rises due to the thermal expansion of the water vapor and the internal air inside the bag, and eventually the bag bursts due to the expansion pressure and the contents are scattered. In addition, there is a disadvantage that the inside of the microwave oven is contaminated.

For this reason, prior to microwave cooking, a small hole has been previously formed in the bag to suppress the rise in the internal pressure and prevent the bag from bursting.

[0005] However, in this method, the steam generated by the start of heating is immediately released to the outside of the bag, and the steaming effect of the steam is reduced, and the drying of the food inside the bag progresses. Will cause deterioration.

As examples of packages developed to solve these drawbacks, those described in Japanese Patent Application Laid-Open Nos. 9-150864 and 10-384088 are known.

[0007] This package, in which the joint portion of the easy-opening seal is provided on one side, is intended to solve the conventional problems, so that the consumer does not need to make small holes in the bag. The heating rise pressure is automatically released, the contents do not leak during heating, and the contents can be easily transferred after heating.

However, when transferring the contents,
If the consumer overlooks the method of use and accidentally lifts the packaging bag with the apron facing down, if the contents are liquid, the contents are likely to leak out from the pressure relief part, and the safety is increased. There was room for improvement.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and is directed to a package provided with a jointed palm jointed by heat sealing of a predetermined width. The joint joint is divided into an easy-open seal portion located on the content side of the package, and a complete seal portion connected to the easy-open seal portion and located on the outer side of the package. By providing a passage for releasing pressure to the outside of the package at an appropriate position in the seal width direction, there is no need to significantly change the structure or mechanism of the pressure relief portion, and also a dedicated component such as an open / close valve in terms of cost. Inexpensively without using
It is an object of the present invention to provide a safe heat-treating package that can prevent the contents from dripping even if the package is held with the joint joint facing downward after the pressure is released.

[0010]

Means of the present invention for achieving the above-mentioned object is to form a palm joint in which the same surfaces are brought into contact with each other by a plastic film and joined in a palm shape by heat sealing of a predetermined width. In the package provided with the portion, the joint joint portion, the easy-open seal portion located on the content side of the package, and connected to the easy-open seal portion to the outside of the package And a complete sealing portion, wherein the complete sealing portion is provided with a passage for releasing pressure to the outside of the package at an appropriate position in the seal width direction of the complete sealing portion. It is in.

[0011] In the passage of the joint portion, the relief pressure inlet faces the easy-open seal portion, and the relief pressure outlet portion reaches the outer end of the complete seal portion.

[0012] In the passage of the joint portion, the relief pressure inlet faces the easy-open seal, the relief pressure outlet reaches the outer end of the complete seal part, and the relief pressure inlet and the relief pressure outlet are connected. A bent detour is provided between the two.

[0013] In the passage of the joint portion, the relief pressure inlet portion faces the easy-open seal portion, and the relief pressure outlet portion is provided in the middle of the complete seal portion in the seal width direction.

[0014] In the passage of the joint portion of the joint, the relief pressure inlet faces the easy-open seal portion, the relief pressure outlet portion reaches the outer end of the complete seal portion, and the relief pressure outlet portion has the easy-open seal member. Sealed.

[0015] In the passage of the joint portion of the joint, the inlet for the relief pressure faces the easy-open seal, the outlet for the relief reaches the outer end of the complete seal, and a hydrophobic body is provided at the relief outlet. .

[0016]

Next, an embodiment of a package for heat treatment according to the present invention will be described with reference to the drawings. In FIG. 1 to FIG. 3, FIG. 5, and FIG. 7, A is a package for heat treatment, in which an article to be used is provided by applying predetermined heating, and a microwave oven or the like is appropriately heated at the time of use. This is for removing the contents 6 by heat-treating by means and tearing a part of the bag.

The package A for heat treatment is, for example, shown in FIG.
As shown in the figure, the main bodies 1 and 2 made of a pair of front and back plastic films formed in a rectangular shape or the like, the top sealing portion 3a at the top which is an opening, and the bottom portion 3b obtained by folding and folding the plastic film of the main body 1 And heat-sealing of a predetermined width is performed by a heat-sealing film 5 forming a heat-sealing joint portion 4 to be described later to form a tubular shape into a bag body.
It is obtained by filling the inside with the contents 6 and heat-sealing the cylindrical top seal portion 3 to hermetically package the contents 6. In addition, this package A for heat treatment is shown in FIG.
As shown in the figure, a self-solid body having a bottom body 15 at the bottom may be used.

The main bodies 1 and 2 and the gasket film 5 made of a plastic film are made of a plastic material having heat resistance to heating of a microwave oven. For example, polypropylene, nylon 6, polyester, ethylene-vinyl alcohol copolymer is used. Biaxially stretched film composed of coalesced, vinylidene chloride-acrylate copolymer film, aluminum oxide vapor deposition or silicon oxide vapor deposition, biaxially stretched polyester film, polymetaxylylene adipamide polyamide stretched film (6-nylon and (Including a co-extruded laminated film).

As the sealant layer, a homo-, block-copolymer or random-copolymer polypropylene film, a film of linear low-density polyethylene, metallocene-based polyethylene, or high-pressure low-density polyethylene is used. In addition, gas barrier plastic films to which an inorganic oxide thin film has been applied include, for example, a film obtained by heating and evaporating a simple substance or a mixture of aluminum oxide and silicon oxide under vacuum and depositing it on the surface of a biaxially stretched polyester film biaxially stretched nylon. Is mentioned.

The aforementioned palm joint portion 4 is joined in a palm shape by the main body 2 and the palm film 4, and the palm joint portion 4 is orthogonal to the length direction or the length direction of the package A. In the width direction, it is provided at a position offset to one of the center positions. Note that the joint portion 4 may be provided in the vicinity of the above-mentioned center position, not in a so-called offset position.

Further, the joint portion 4 includes an easy-open seal portion 7 located on the side of the contents 6 in the package A,
The package A is connected to the easy-open seal portion 7 and has two regions divided into a complete seal portion 8 located outside the package A.

Among these, the easy-open seal portion 7 has an easy-open seal property close to the contents. As a sealant layer to be a film, a composite material of a suitable polyolefin resin or the like may be used, or an easy open film tape may be attached to the joint joint 4
Is inserted between the joints when forming the frame, and is provided on the entire surface or a part of the length thereof.

Incidentally, the easy-opening seal means that the easy-opening seal with respect to the escape pressure, that is, the heat seal strength in a 90 ° C. atmosphere is 11.8 N / 15 mm or less. May be completely sealed or easy open (easy opening). In addition,
The heat seal strength is in accordance with JISZ0238 “Test method for heat seal flexible packaging bag and semi-rigid container”,
Only the ambient temperature is a value measured by changing to 90 ° C.

Next, the above-mentioned complete seal refers to a strength that does not cause peeling with respect to the internal pressure at the time of pressure release and after internal pressure release, and it is sufficient that the heat seal strength is 19.6 N / 15 mm or more. .

The complete seal portion 8 is provided with a passage 9 for releasing the pressure inside the package A to the outside of the package A at an appropriate position in the seal width direction. That is, this passage 9
When the internal pressure of the package A increases due to the heat treatment,
Through the easy-open seal portion 7 opened by the internal pressure,
The internal pressure is released from the passage 9 to the outside of the package A.

For example, as shown in FIG. 3, the form of the passage 9 is such that the relief pressure inlet 9a in the passage 9 where the relief pressure starts is formed by the complete seal portion of the easy-open seal portion 7. 8, the relief pressure outlet 9 b of the passage 9 is opened so as to reach the outer end of the complete seal 8, that is, a portion connected to the outside (outside air). When the part 7 is opened, the passage 9
The inside of the package A is communicated with the outside (outside air).

Therefore, the starting position of the passage 9 is the boundary between the areas of the two seal portions 7 and 8. In actual production, if there is a possibility that the heel seal forming the passage 9 and the boundary between the regions of the two seal portions 7 and 8 may be slightly shifted,
As shown in FIG. 4, the passage 9 may be formed from a position where the relief pressure inlet 9a slightly (appropriately) enters the easy-open seal portion 7. The passage 9 does not necessarily have to be straight as shown in FIGS. 3 and 4, and either one of the passages extends from the pressure relief inlet 9a to the pressure relief outlet 9b, or a crucible. It may be formed in a completely tapered or arcuate shape.

As shown in FIG. 4, the relief pressure inlet 9a
The opening portion may reach from the boundary of the easy-opening seal portion 7 to the complete seal portion 8 to a position where it enters the easy-opening seal portion 7 side.

By providing the above-mentioned joint part 4 at a position shifted to one side of the package A, when the package A expands, the short side of the package A sandwiches the tension caused by the expansion. The main joint 2 is placed in a substantially upright state, and the palm joint portion 4 rises with respect to the upper surface of the package due to the tension of the main body 2 film on the long side on the opposite side. Contact or proximity is avoided, and a sufficient peeling angle of the easy-open seal 7 is obtained at the joint joint portion 4 to promote the peeling, an internal pressure is guided to the passage 9, and the package A is smoothly placed. The internal pressure can be escaped, and the rupture of the package A due to overexpansion can be prevented.

The package A for heat treatment of the embodiment of the present invention configured as described above has the following effects. When the package A in which the contents 6 are hermetically sealed is heated in a microwave oven, the package A expands due to generation of water vapor and thermal expansion of the internal air,
Furthermore, when the internal pressure rises and this pressure reaches the limit of the sealing strength of the easy-open seal portion 7, as shown in FIG. The process proceeds to d, and finally reaches the relief pressure inlet 9 a in the passage 9 and communicates with the inside of the package A.

The passage 9 is expanded by receiving the internal pressure of the package A from a flat state to a substantially circular or substantially elliptical cross-sectional shape of the passage 9, and the internal pressure passes through the passage 9 smoothly. Pressure.

When the heating process of the microwave oven is completed, the water vapor and the air in the package A are released from the passage 9 so that the package A
Since the water vapor remaining inside also starts to condense, the swelled package body A rapidly contracts, and the passage 9 loses the internal pressure due to the water vapor or air passing through it, and returns to a flat / flat state before heating. .

Thereafter, even if the package A is picked up with the joint joint 4 facing downward, the leakage of the contents 6 from the passage 9 does not occur. This is for the following reason.

First, when the package A is lifted, the contents 6 are concentrated downward by its weight.
As shown in FIG. 7, a swelling state of the ship bottom shape e is exhibited.

For this reason, the joint portion 4 is bent in an arc along the outer periphery of the package A along the bottom shape e, and the joint portion 4 swells at the joint portion 4.
Is pulled in tension in the width direction of the package A, so that the flattened passage 9 is pressed to be in a pseudo-sealed state.

Further, as shown in FIGS. 5 and 6 (a), at the separation boundary d of the joint part 4 of the joints, the self-weight of the contents 6 causes the separation film d to be 180 ° around the separation boundary d. Folded downward and the contents 6
As a result, the relief pressure inlet 9a of the passage 9 is quasi-sealed by being pressed against the joint joint 4 so that the contents 6 do not flow into the passage 9. With the above operation, leakage of the contents 6 does not occur.

The reason why the passage 9 is provided in the complete seal portion 8 is that the periphery of the passage 9 is peeled off due to the internal pressure and the passage 9 is removed.
This is to prevent the shape from being deformed, and the effect of preventing leakage can reproduce the best condition.

In order to prevent leakage in this structure, the width of the complete seal portion 8 and the width of the passage 9 are important. The complete seal portion 8 is 3 mm or more, and the width of the passage 9 is 5 to 3 mm.
0 mm is desirable.

This is for the following reason. In the portion along the peeling boundary line d excluding the passage 9, when the palmer film 5 is pulled downward by the weight of the content 6, one side of the palmer film 5 is fixed by a seal, and therefore, FIG. )
As shown in FIG. 5, the apod film 5 is bent neatly at 180 ° with the peeling boundary d as a fulcrum. However, since the one side of the apod film 5 is not fixed at the passage 9 part, it does not bend neatly, so that the contents 6 Forgive intrusion.

However, if the width of the passage 9 is 30 mm or less, as shown in FIG. 5B, the folds on both sides of the passage 9 propagate to the passage 9 and are smoothly bent at 180 °, so that the contents are 6 can be prevented from entering.

Even if the width of the passage 9 is 30 mm or less, if the width of the complete seal portion 8 is 3 mm or less, the
The bending of the part is not successful and there is a similar problem. When the width of the passage 9 is 5 mm or less, the cross-sectional area of the passage 9 becomes too small, and the internal pressure at the time of heating is not smoothly released, and there is a risk of explosion.

Another passage 9 in the joint portion 4 described above.
As shown in FIGS. 8A and 8B, the relief pressure inlet 9a faces the easy-open seal portion 7, and the relief pressure outlet portion 9b reaches the outer end of the complete seal portion 8, as shown in FIGS. In addition to the above configuration, a bent bypass portion 9c is provided between the relief pressure inlet 9a and the relief pressure outlet 9b. Although the detour 9c is not always necessary, when the package A is taken out downward, the detour 9c increases the length of the passage for compressing the package A, so that the contents 6 leak from the inside of the package A. The prevention effect is further improved, and the contents are visually recognized by the user.
Can be realized, and a sense of security during use can be given. The relief pressure outlet 9b in this passage 9 reaches the end in the longitudinal direction of the package A, as shown in FIG. 8A, or the longitudinal direction of the package A, as shown in FIG. Reaches the end in the width direction perpendicular to the direction.

Further, the form of the passage 9 is shown in FIG.
As shown in FIG. 2, the relief pressure inlet 9a faces the easy-open seal portion 7, and the relief pressure outlet 9b may be provided in the complete seal portion 8 in the middle of the seal width direction. As shown in the figure, 9b may be a hole, or an outlet (not shown) formed in a slit shape or a cut shape. In this example, as shown in the figure, a bent bypass part 9c may be provided between the relief pressure inlet part 9a and the relief pressure outlet part 9b.

Further, as shown in FIG. 9 (a), the form of the passage 9 of the joint portion 4 is such that the relief pressure inlet 9a faces the easy-open seal portion 7 and the relief pressure outlet 9b is completely closed. Reaching the outer end of the seal portion 8, the relief pressure outlet portion 9b is sealed by the easily-openable seal body.

With regard to the attachment of the easy-open seal 10, the food packaging bag may be sterilized by heating with hot water or steam after the food has been filled. Water enters the part,
This may cause the contents 6 to remain until the time of consumption, and there is a possibility that water or a foreign substance may newly enter during distribution or the like, which is not preferable in terms of hygiene and appearance. In order to prevent this, it is necessary to seal the relief pressure outlet portion 9b in the passage 9 with the easily-openable seal body 10 described above.

In this case, since the internal pressure is hardly applied to the relief pressure outlet portion 9b of the passage 9, the heat sealing strength is 2.9N.
/ 15mm or less. Since the release force does not act on the relief pressure outlet 9b of the passage 9 except at the time of microwave heating, there is no problem with this low strength.

Further, as another means of the easily-openable seal body 10, as shown in FIG.
In this embodiment, the relief pressure inlet 9a has an easily openable seal 7
, The relief pressure outlet portion 9b reaches the outer end of the complete seal portion 8, and the hydrophobic member 11 is provided in the relief pressure outlet portion 9b.

As for the provision of the hydrophobic body 11, a small amount of hydrophobic oil is applied to the inside of the relief pressure outlet 9b in the passage 9. The oil blocks the main body 2, which is a film, and the joint film 5 in the passage 9 by capillary action, and pseudo-tightly seals the oil.
Water and foreign substances can be prevented from entering the inside of the passage 9.

The oils that can be used are hydrophobic and fluid and have no problem in terms of hygiene. Vegetable oils such as silicone oil, soybean oil and rapeseed oil, paraffin-based process oils, fatty acids and fatty acid derivatives can be used. Can be

(Example 1) Layer constitution: transparent vapor-deposited polyester film GL-AEH (12 μm, manufactured by Toppan Printing Co., Ltd.)
m / biaxially stretched nylon 6 film (15 μm) / unstretched block copolymer polypropylene film (60 μm
m) was laminated by a dry lamination method. With this composite film, width 150mm, length 180m
m, a bag with a seal width of 10 mm (package A) was prepared. At this time, the width 1 is set at a position 30 mm from the bottom of the package A.
A joint joint 4 of 0 mm was provided.

In order to form the easily openable seal portion 7, the portion of the joint A 4 having a width of 4 mm inside the package A is an easy open film FM for propylene (trade name, manufactured by San-A Kaken Co., Ltd.). , 50 μm) and heat sealed. The outer portion of the package A having a width of 6 mm is heat-sealed as it is in order to form the complete seal portion 8, and a passage 9 having a width of 15 mm is formed in the center, and a boundary line d between the easy-open seal portion 7 and the complete seal portion 8 is formed. From the packaging A
It was made in the shape to make an opening outside. And this passage 9
A small amount of hydrophobic silicone oil 11 was applied to the inside of the pressure relief outlet 9b.

The package A was filled with 200 g of corn soup, and the upper part of the bag was sealed with a heat seal having a width of 10 mm. Next, the package A was subjected to retort sterilization at 120 ° C. for 30 minutes in a hot water circulation type retort pot.
After sterilization, the passage 9 at the joint joint portion 4 of the package A was observed. As a result, the relief pressure outlet 9b of the passage 9 was pseudo-sealed as before sterilization, and water did not enter the passage 9. .

When the seal strength of the easy-open seal portion 7 at the joint portion 4 was measured, it was found to be 9.2 N / 15 mm.
When the seal strength in a 90 ° C. atmosphere was measured, it was reduced to 2.2 N / 15 mm. Further, the seal strength of the complete seal portion 8 was 48 N / 15 mm.

Next, in a 600 W microwave oven, the package A was placed on the turntable with the joint joint 4 facing upward and heated for 3 minutes. 5 tests. As a result, 2 minutes and 30 seconds after the start of heating, the package A expands to the maximum,
Within 5 seconds, the easily-openable seal portion 7 peeled off, and the internal pressure was released from the relief pressure outlet portion 9b through the passage 9. The contents 6 did not leak until after the heating from the passage 9 was completed. After the heating was completed, the package A was lifted with the joint joint 4 turned downward, and held for 1 minute, but no leakage of the contents 6 from the passage 9 occurred.

Example 2 A self-standing bag (package A) having the same film configuration as in Example 1 but having a width of 130 mm, a length of 150 mm, a bottom film width (when folded in two) 37 mm, and a side seal width of 7.5 mm It was created. At that time, the joint part 4 having a width of 25 mm was provided at a position 60 mm from the top of the package A.

In order to form the easily openable seal portion 7, only the portion 5 mm wide inside the package A of the joint portion 4 is
FM (trade name, manufactured by San-A Kaken Co., Ltd., 50 μm) was inserted and heat sealed. 20m outside width of package A
As for m, in order to form a complete seal portion 8, heat sealing was performed as it was, and a passage 9 having a width of 15 mm was provided in a shape as shown in FIG. Also, the relief pressure outlet 9 of the passage 9
For b, 3 g / m ² (solid content) of a heat sealant PP fine seal (manufactured by Toyo Ink Mfg. Co., Ltd.) is applied to the inner surface of the main body 2 or the inner surface of the film 5 and dried, and then the width is 2 m.
m heat seal. This package A was filled with 200 g of corn soup, and the upper portion of the package A was sealed with a 10 mm-wide heat seal.

Next, the package A was subjected to retort sterilization at 120 ° C. for 30 minutes in a hot water circulation type retort pot. After sterilization, the passage 9 of the joint joint 4 of the package A was observed. As a result, the pressure relief outlet 9b in the passage 9 was sealed as before, and no water entered the passage 9. When the seal strength of the easy-open seal part 7 at the joint part 4 was measured, the seal strength was 9.3 N / 15 mm. When the seal strength under a 90 ° C. atmosphere was measured, it was reduced to 2.0 N / 15 mm. did. Further, the seal strength of the complete seal portion 8 was 4.5 N / 15 mm, and the seal strength of the easy-open seal body 10 at the pressure relief outlet 9 b in the passage 9 was 1.8 N / 15 mm.

Next, the package A was placed on a turntable in a 600 W microwave oven in an independent state and heated for 3 minutes. 5 tests. As a result, 2 minutes 50 minutes from the start of heating
After a few seconds, the package A expands to the maximum, and within 5 seconds, the easily-openable seal portion 7 peels off and communicates with and expands into the passage 9.
Easy-open seal body 10 at pressure relief outlet 9b in passage 9
Peeled off and the internal pressure was released. The contents 6 did not leak until after the heating was completed.

After the heating was completed, the package A was lifted with the joint joint 4 facing downward and held for 1 minute, but no leakage of the contents 6 was observed.

(Comparative Example 1) A film having the same structure as that of Example 1 was formed with a width of 150 mm, a length of 180 mm, and a seal width of 1.
A 0 mm camas bag was prepared. At that time, 30
A 10 mm wide joint palm joint is provided at the position of mm, and FM (trade name, manufactured by San-A Kaken Co., Ltd., 5
0 μm), and the whole surface was heat-sealed. Fill this packaging bag with 200 g of corn soup and cover the top of the bag with 10 m
Sealed with m-width heat seal.

Next, the packaging bag was subjected to retort sterilization at 120 ° C. for 30 minutes in a hot water circulation type retort pot. When the seal strength of the easily-openable seal portion of this joint part was measured, the seal strength was 9.3 N / 15 mm.
When the seal strength was measured in an atmosphere of 0 ° C., 2.2
N / 15 mm.

Next, the packaging bag was heated on a turntable with a 600 W microwave oven with the joint joint facing upward, for 3 minutes. 5 tests. As a result, two and a half minutes after the start of the heating, the bag was inflated to the maximum, and within 5 seconds, the easily-openable seal portion was peeled off, passed to the outside, and the internal pressure was released. Then, no leakage of the contents occurred until after the end of the heating. However, after the heating was completed, the packaging bag was lifted with the joint joint facing downward, and immediately after that, the contents leaked from the place where the internal pressure was released.

[0063]

As described above, the package for heat treatment according to the present invention is a package in which the jointed palm joints joined in a palm-shape manner by heat sealing of a predetermined width are provided at positions offset.
The joint joint is divided into an easy-open seal portion located on the content side of the package, and a complete seal portion connected to the easy-open seal portion and located on the outer side of the package. In the proper position in the width direction of the seal, a passage for releasing the pressure to the outside of the package is provided, so that the contents such as food can be cooked by a microwave oven as it is while being packed, It is possible to escape the upper pressurization generated in the interior and to prevent the rupture of the package due to the rising pressure. Even if the contents stored in the package are liquid, even if the package is held with the joint joint having a pressure relief passage facing downward after heating, the contents may leak out from the passage even if the package is held. There is no. And so on.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view showing one embodiment of a package for heat treatment according to the present invention.

FIG. 2 is a partially cutaway perspective view showing another example of the package for heat treatment in FIG. 1;

FIG. 3 is an explanatory view showing a passage of a joint joint in FIG. 1;

FIG. 4 is an explanatory diagram showing another passage of the palm joint in FIG. 1;

FIG. 5 is a partial explanatory view showing a pressure relief state of the package for heat treatment in FIG. 1;

6 is a cross-sectional view of each part in FIG. 5, (a) is XX
The line portion, (b), was cut along the line Y-Y.

FIG. 7 is a perspective view showing a suspended state of the package for heat treatment in FIG. 1 after the pressure is released.

FIG. 8 is an explanatory diagram showing passages of still another example of the joint joint in FIG. 1;

FIGS. 9A and 9B are explanatory views showing passages of the joint portion in FIG. 1. FIG. 9A shows an example in which an easily-openable seal is provided, and FIG. 9B shows an example in which a hydrophobic living body is provided.

[Explanation of symbols]

 Reference Signs List A Heat treatment package 1, 2, 5 Plastic film 4 Joint joint 7 Easy-open seal film 8 Complete seal 9 Passage 9a Relief pressure inlet 9b Relief pressure outlet 9c Detour 10 Easy-open seal 11 Hydrophobic body

Claims (6)

[Claims] 1. A packaging body provided with a jointed palm joint that joins the same surface side with each other by a plastic film and joined in a palm joint shape by heat sealing of a predetermined width, wherein the joint palm joint part is the package. The easy-open seal portion located on the content side of the body, and a complete seal portion connected to the easy-open seal portion and located on the outer side of the package body are divided. A package for heat treatment, wherein a passage for releasing pressure to the outside of the package is provided at an appropriate position in the seal width direction of the complete seal portion. 2. The passage of the joint portion of the gasket joint according to claim 1, wherein the relief pressure inlet portion faces the easy-open seal portion and the relief pressure outlet portion reaches the outer end portion of the complete seal portion. Heat treatment package. 3. The passage of the joint joint portion has a relief pressure inlet facing the easy-open seal portion, a relief pressure outlet portion reaching an outer end of the complete seal portion, and the relief pressure inlet portion and the relief port are connected to each other. 2. The package for heat treatment according to claim 1, wherein a bent bypass is provided between the package and the pressure outlet. 4. The passage of the joint joint portion has a relief pressure inlet portion facing the easy-open seal portion, and a relief pressure outlet portion is provided at an intermediate portion of the complete seal portion in the seal width direction. 2. The package for heat treatment according to 1. 5. The passage of the joint joint has a relief pressure inlet facing an easily openable seal, a relief pressure outlet reaching an outer end of the complete seal, and a relief pressure outlet having an easily openable seal. The package for heat treatment according to claim 1, wherein the package is sealed by a seal. 6. The passage of the joint joint has a relief pressure inlet facing the easy-open seal portion, a relief pressure outlet portion reaching the outer end of the complete seal portion, and a hydrophobic material in the relief pressure outlet portion. The package for heat treatment according to claim 1, further comprising: