JP2001206458A - Heating and cooking packaging member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating and cooking packaging member in which gas such as air or the like within the bag pressurized as the bag is heated in a cooking device such as a microwave oven can be smoothly discharged out of the packaging member together with silent seal opening sound at a spot-like opened hole formed in the packaging member. SOLUTION: There is provided a heating and cooking packaging member in which at least one non-heat sealed portion released at an outer edge side is formed at a part of one heat seal portion of a long side through the heat sealed portion of 1 mm or more at its inner edge side. It is preferable that a width (W1) of the non-heat sealed portion ranging from the extremity end of the non-heat sealed portion to a point spaced apart by 1 mm from it is less than 20 mm. In addition, it is preferable that this packaging member is constructed such that a relation between a length (W) in a width direction of the heat-sealed portion and a length (H) in a longitudinal direction of the heat-sealed portion may satisfy an equation of W>13.77H-0.3883 and then it is particularly superior as a retort pouch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package in which cooked or semi-cooked food or the like is heat-sealed in a hermetically sealed state, and more particularly to a package which is heated in a cooking device such as a microwave oven. The present invention relates to a heating and cooking package in which only the gas inside the package pressurized and evacuated is quietly and smoothly exhausted without accompanying a bursting sound or an explosion sound.

[0002]

2. Description of the Related Art In recent years, with the development of materials having excellent properties for use in packaging, there has been a remarkable development of packaging in the food field. There are many food packages on the market that can be provided to consumers without losing taste.

[0003] These food packages are heated by a heating cooker such as a microwave oven until the contents are restored to the state at the time of cooking. Therefore, the food packages have heat resistance enough to withstand the heating. It is desired to provide a means for avoiding a situation in which the gas or water vapor in the package expands due to heating during cooking, the pressure increases, and the package eventually bursts. In order to solve such a problem, many techniques have been proposed in which a part of the heat seal portion of the package is configured to be peelable, and the gas inside the package is discharged to the outside from the portion.

[0004] For example, (a) registered utility model No. 304839
As shown in FIG. 7, in Japanese Patent Publication No. 1-2003, in a bag 1 made by heat sealing, a part of a heat-sealed portion 2 is punched to form a punching hole 3, and the sealing strength of the punching hole is reduced. There is disclosed a packaging bag for heating a microwave oven, which is configured to lower the internal pressure generated at the time of heating to peel off the punched holes and release the internal pressure to the outside. This punching hole may be formed in the heat seal portion, or may be formed so as to cut out the outer edge of the heat seal portion.

Further, (b) Japanese Patent Application Laid-Open No. Hei 10-147371 has a heat seal portion c as shown in FIG.
In the easily peelable package filled with the contents, the heat seal portion has a concave portion a at an outer edge thereof, and an inner edge c- of the seal portion.
No. 2 discloses a packaged product for microwave cooking, wherein the package is linear and the package is composed of a delamination multilayer film. Although the shape of the concave portion in this packaged article is not particularly defined, the seal portion is configured to be easily peelable such that the seal strength is 300 to 1500 g / 15 mm width or less at room temperature, and the pressure inside the package is reduced. When the height is increased, delamination occurs starting from the concave portion of the seal portion, and gas is released to the outside from that portion.

[0006] The above two prior arts (a) and (b) are based on the pressure inside the package which is increased by heating the microwave oven.
A similar technique can be said in that a part of the heat seal portion is automatically peeled off from the inside of the package and gas is discharged to the outside to prevent the package from bursting or deforming.

However, in the technique (a), there is a problem in that small pieces generated by punching at the time of bag making adhere to the product, and the production speed is limited. Also, in the technique (b), the heat-sealed portion is made of a multilayer film having a delamination property, the sealing strength is weak, a large opening sound and a large opening sound are generated at the time of opening, and there is a concern that the contents may be scattered. Is done.

The seal strength of the heat seal is max23N
A retort-compatible sealed package for cooking with a width of / 15 mm satisfies the sealing strength, and no mechanism has been proposed for automatically discharging the gas in the bag when heated in a microwave oven. If the size of the opening is large, the contents will be scattered during heating and soil the inside of the microwave oven, or if the heating is forgotten to open, the package will burst, There is a problem that the contents are scattered and cannot be eaten.

Accordingly, an object of the present invention is to provide a heating and cooking package capable of automatically discharging only gas to the outside when the pressure inside the package increases when heating the cooking package with a microwave oven. Is to provide. It is another object of the present invention to provide a heating cooking package in which the gas is discharged without explosion or explosion, thereby creating a comfortable cooking environment.

[0010]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and a non-heat-sealed portion having a specific shape is formed on a heat-sealed portion at a specific portion of a package. It has particularly important features.

That is, according to the present invention, in the package for heating and cooking, a part of one of the heat seal portions on the long side is opened to the outer edge side through the heat seal portion of 1 mm or more on the inner edge side. A package for heating and cooking is provided, wherein at least one heat seal portion is formed.

Further, according to the present invention, there is provided the package for heating and cooking wherein the width (W1) of the non-heat-sealed portion at a point 1 mm from the tip of the non-heat-sealed portion is less than 20 mm.

Further, according to the present invention, the width (W) of the heat seal portion in the width direction and the length (H) from the outer edge to the inner edge of the heat seal portion are expressed by the ^following equation: W> 13.77H- ^0.3883 . The above-described package for heating and cooking that satisfies the relationship is provided.

Further, according to the present invention, there is provided the package for heating and cooking described above, wherein the seal width (W0) at the tip of the non-heat-sealed portion is 16 mm or less.

According to the present invention, at least a part of the non-heat-sealed portion is a heat-sealed portion on the long side of the package, and the shortest distance from the center of the package to the outer edge on the long side is defined as a radius. The above-mentioned package for heating and cooking is provided in a circle having a shape.

Further, according to the present invention, there is provided the above-mentioned package for heating and cooking, wherein the package is a retort pouch.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail. A feature of the present invention is that, when a cooking package is heated by a microwave oven or the like, the internal pressure increased by heating can be smoothly discharged to the outside with almost no opening sound such as a burst or explosion. It is given to the body, and at this time, it is needless to say that the contents do not leak out.

The present invention will be described below with reference to the drawings.
In order to achieve the above object, the present inventors have focused on forming a non-heat seal portion having a specific shape in a part of a specific heat seal portion. That is, as shown in FIG. 1, the heating cooking package according to claim 1 of the present application is a heating cooking package 1 formed by heat-sealing four sides of a rectangular shape.
1, the distance S between the inner edge side 12 'and the tip P of the non-heat-sealed portion is partially provided on one of the heat-sealed portions 12 on the long side.
It is an important feature that is sealed via a heat seal portion of 1 mm or more, and at least one non-heat seal portion 13 which is open to the outer edge side is formed.

The non-heat-sealed portion 13 is a heat-sealed portion 1.
2 is formed at a position of 1 mm or more, preferably 1 to 6 mm from the inner edge side 12 ′, and the seal width (W 0) of the tip P of the non-heat-sealed portion 13 is 16 mm at the maximum.
Desirably. By making the configuration of the non-heat-sealing portion 13 as described above, when the internal pressure in the package increases due to the heating, the gas flows into the non-heat-sealing portion 1.
3 'where seal strength is reduced due to formation of 3'
Then, the portion is automatically peeled off from the inside of the package, the hole is opened, and the hole is communicated with the non-heat-sealing portion 13 to be discharged out of the package.

The requirement that the seal width from the inner edge of the package to the non-heat-sealed portion 13 be 1 mm or more is determined as a result of repeated experiments by the present inventors. The strength of the seal portion cannot be said to be sufficient, and it cannot sufficiently serve as a package for heating and cooking. Also, when the seal width (W0) is 16
If it is formed in excess of mm, the peeling of the seal portion does not concentrate on the portion 13 ', which may lead to a burst of the entire package.

In the present invention, the seal width (W)
The setting of 0) can also be said to be significant in that bursting or explosion sound when gas is discharged is suppressed. In the conventional package for heating and cooking, there is no proposal for suppressing the opening sound at the time of discharging the gas, and in the present invention, the package with the non-heat-sealed portion 13 provided in a part of the heat-sealed portion is not proposed. In relation, the seal width (W
The significance of defining 0) is significant.

The package for heating and cooking according to the present invention has a non-heat-sealed portion 13 from the viewpoint of suppressing the opening sound when gas is discharged.
It is preferable that the width (W1) of the non-heat-sealed portion at a point t 1 mm from the tip P of the non-heat-sealed portion is less than 20 mm. The width of W1 defined by the present invention is, as shown in FIGS. 3 and 4, the tip P of the non-heat-sealed portion 13.
Is a width of the non-heat-sealed portion when a line parallel to the inner edge line of the side seal portion is drawn, and a line is drawn in parallel with the parallel line at a point t of 1 mm inward from the parallel line toward the non-heat-sealed portion,
This means that the width is formed to be less than 20 mm. The lower limit of W1 may be as small as possible as long as it is formed as a non-heat-sealed portion, but is about 1 mm in consideration of the heat-sealing technology in the art. FIG.
(A) to (d) are enlarged views showing preferred examples of the shape of another non-heat-sealed portion in the package for heating and cooking of the present invention, but of course, the present invention is not limited to this.

Meanwhile, in the conventional package for heating and cooking as shown in the above-mentioned prior art, the heat-sealing layer of the hermetically sealed package is easily peeled off in order to easily discharge gas accompanying heating in a microwave oven or the like. By using a resin having a high resistance, the peeling between the heat seal layers of the sealed package is facilitated, and
Since a non-heat-sealed portion is formed in the vicinity of this and gas is discharged from the separated portion, the seal strength of the heat-sealed portion must be set low, and the seal strength is max23N / 15 mm width. It cannot be used in retort pouches that are defined as above.

In the package for heating and cooking according to the present invention, the seal strength of the heat seal portion including the non-heat seal portion 13 is max.
23N / 15mm width or more, that is, even though it is a package for heating and cooking that can sufficiently cope with retort pouches, when heating in a microwave oven, the gas inside the package is smooth,
An important feature is that the paper can be discharged without making a loud opening sound.

According to the knowledge of the present inventors, the requirement that the seal strength of the heat seal portion is not less than max23N / 15 mm width is based on the width (W) of the heat seal portion in the width direction shown in FIG. the length from outer edge to inner edge of the (H), can be achieved by forming a non-heat-sealed portion 13 so as to satisfy the relationship of formula, W> 13.77H ^{-0 .3883.} And, by satisfying this relational expression, even in the case of a cooking package such as a retort pouch, it is possible to smoothly discharge the gas accompanying the cooking without generating an unpleasant plosive or explosive sound. become able to.

It is to be noted that the relationship of WH is supplemented with reference to FIG. 5. If the width of the heat-sealing portion including the non-heat-sealing portion 13 is arbitrarily set to 15 mm, the shape of the heat-sealing portion is as shown in FIG. As shown in b) and (c), W
It can be considered as an aggregate in which two vertically long rectangles consisting of a and Ha and horizontally long rectangles consisting of Wb and Hb partially overlap. The horizontal length of the rectangle is is W, the vertical length when the H, one of the two rectangles are formed so as to satisfy the above relationship W> 13.77H ^{-0.3 883} That is, it is good.

The above relational expression W> 13.77H
^-0.3883 must be satisfied even in the heat seal portion not including the non-heat seal portion as shown in FIG. 5 (d).

The width (W) of the heat seal portion in the width direction
And the length (H) from the outer edge to the inner edge of the heat seal portion is derived as a result of repeated experiments by the present inventors, and the one satisfying this relationship is shown in FIG.
As is clear from FIG. 5, the seal strength of the heat seal portion achieves a retort-compatible max 23 N / 15 mm width or more.
A seal strength of 23 N / 15 mm width or more cannot be achieved.

Further, in the package for heating and cooking according to the present invention, as shown in FIG. 2, at least a part of the non-heat-sealed portion 13 is formed by the heat-sealed portion 12 on the long side of the package.
However, it is preferable that the shortest distance from the center A of the package to the long side outer end 14 is formed in a circle having a radius R. This definition means that even if two or more non-heat-sealed portions 13 are formed, at least a part of the non-heat-sealed portion 13 is included in the circumference.

To explain the above structure, the pressure inside the package, which is increased by heating the microwave oven, firstly
To concentrate on the portion closest to the center A of the package, that is, near the center 14 'of the heat seal portion 12 on the long side,
It is important that an opening communicating with the heat seal portion 12 and the non-heat seal portion 13 is first formed in this portion. According to experiments by the present inventors, if at least a part of the non-heat-sealed portion 13 is formed within the heat-sealed portion 12 within the radius R, particularly, within the range indicated by the arrow B in FIG. It has been confirmed that opening is preferably performed without a popping sound or an explosion sound.

The material constituting the package for heating and cooking of the present invention is such that the inner layer serving as the sealing surface is made of polypropylene or propylene, ethylene, butene-1, hexene.
1, a copolymer with an α-olefin other than propylene such as octene-1, a thermoplastic resin having heat sealing properties, for example, polyester, nylon and the like are used.

The outer layer to be laminated thereon may be a thermoplastic resin having or not having a heat sealing property, for example, biaxially stretched polypropylene, ethylene-vinyl acetate copolymer (EVA), saponified EVA, ionic Polyolefins such as crosslinked olefin copolymers (ionomers): aromatic vinyl copolymers such as polystyrene and styrene-butadiene copolymers: halogenated vinyl polymers such as polyvinyl chloride and vinylidene chloride resins: polyacrylic resins, Nitrile polymers such as acrylonitrile-styrene copolymer and acrylonitrile-styrene-butadiene copolymer: polyesters such as biaxially stretched polyethylene terephthalate and polytetramethylene terephthalate: various polycarbonates: polyacetals such as polyoxymethylene: aliphatic, Aroma System polyamide, a thermoplastic resin such as polyimide alone or by laminating two or more can be used. Also, for the purpose of imparting gas barrier properties,
A non-metal deposited film, scale-like substance, or oxygen-absorbing substance may be used. The laminated film may have not only a structure of two layers but also a structure of three or more layers in terms of oxygen barrier properties.

The total thickness of the laminated film is appropriately determined depending on the type and size of the package, but in an experiment conducted by the present inventors, nylon (15 μm) was used.
/ Nylon (15μm) / Polypropylene (70μm)
The laminated film having a total thickness of 100 μm was used, and the polypropylene side of the laminated film was combined and heat-sealed to form a bag.

The production method of this laminated film is not particularly limited, and means for laminating the inner layer and the outer layer with an adhesive, laminating means by thermal lamination,
Arbitrary means such as bonding means by coextrusion can be employed.

The structure of the package of the present invention described above can be applied to any package which is heated and cooked in a microwave oven or the like, but the seal strength is max 23 N / 15 mm.
In a retort pouch that is required to have a width, the object of the present invention of smoothly discharging the gas in the pouch without accompanying a plosive sound or an explosive sound can be more effectively achieved.

[0036]

According to the present invention, in a package which is heated and cooked in a microwave oven or the like, the gas which has expanded in the package due to heating can be smoothly discharged to the outside of the package with little explosion or explosion sound. A cooking package is provided.

[0037]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
This example is intended to illustrate a preferred embodiment of the present invention and is not intended to limit the present invention.

Example 1 A laminate of 12 μm polyethylene terephthalate / 15 μm nylon / 80 μm polypropylene (PP) was cut into a size of 130 mm × 170 mm and heat-sealed with the PP layers as inner surfaces.
A four-way pouch was made. A semicircle + rectangular non-heat-seal portion 13 shown in FIG. 4C is provided near the center of the long-side heat-seal portion 12 of the laminated body, and between the non-heat-seal portion front end P and the heat-seal inner edge side. Let the distance S be 1, 2, 4,
It was set to 6 mm to obtain a package for heating and cooking. Table 1 shows the relationship between the distance S and the dimension of the non-heat-sealed portion.

[0039]

[Table 1] The package was filled with 180 g of curry and sealed to obtain a package for heating and cooking. The package is subjected to a pressurized steam retort treatment at 121 ° C. for 30 minutes, and further subjected to a peel test of a heat-sealed portion (Tensilon (manufactured by ORIENTEC, model number UCT-5).
At T), a peeling speed of 300 mm / min, a room temperature of 23 ° C. and a humidity of 45%) and a microwave heating test were performed. The results are shown in Table 2.

[0040]

[Table 2] As a result, there was no breakage during the retort treatment, and in the microwave heating, a small hole was opened in all the non-heat-sealed portion 13 so that heating could be performed without scattering of the contents.

<Comparative Example 1> The package for heating and cooking used in Example 1 (the non-heat-sealed portion 13) was used except that the distance S between the front end P of the non-heat-sealed portion and the inner edge of the heat seal was 0.5 mm. The height of the rectangle: 6.5 mm) was used, and a retort treatment, a peel strength, and a microwave heating test were performed. As a result, in the microwave oven heating test, the opening sound was small and the contents were not scattered, but the maximum peel strength of the heat-sealed portion had a portion of 18 N / 15 mm width.
The bag was broken during the retort treatment.

Example 2 A laminate of 12 μm polyethylene terephthalate / 15 μm nylon / 80 μm polypropylene (PP) was cut into a size of 130 mm × 170 mm, and heat-sealed with the PP layers as inner surfaces.
A four-way pouch was made. A polygonal non-heat-sealing portion 13 shown in FIG. 3 is provided near the center of the long side heat-sealing portion, and the width W1 of the non-heat-sealing portion is 2 mm, 5 mm,
It was changed to 10 mm and 15 mm. Curry 1 in the package
80 g was filled and sealed to obtain a package for heating and cooking. The package is subjected to a pressurized steam retort treatment at 121 ° C. for 30 minutes, and further subjected to a peel test (TENSILON (OR
Peeling speed 300 with IENTEC, model number UCT-5T)
mm / min, room temperature 23 ° C., humidity 45%) and a microwave (commercial product, 500 W) heating test. The results are shown in Table 3.

[0043]

[Table 3] As a result, a small hole was opened in the non-heat-sealed portion 13 under any of the conditions, the opening sound was small, and heating was possible without scattering of the contents.

COMPARATIVE EXAMPLE 2 Except that the width W1 of the non-heat-sealed portion shown in FIG. 3 was changed to 20 mm and 25 mm, the package for heating and cooking used in Example 2 (the tip of the non-heat-sealed portion) And distance between heat seal inner edge side: 2m
The same heating test as in m) was conducted using a microwave oven. The results are shown in Table 4.

[0045]

[Table 4] As a result, the opening sound was large under any of the conditions. In particular, in the sealed heating cooking package having a W1 of 25 mm, the contents were observed to be scattered when opened by microwave heating.

<Embodiment 3> The seal width W0 at the tip of the non-heat-sealed portion shown in FIG.
mm and 16 mm, except that the package was the same as the package for heating and cooking used in Example 2 (distance S between the tip of the non-heat-sealed portion and the inner edge of the heat-sealed portion: 2 mm), and the microwave was heated. went. Table 5 shows the results.

[0047]

[Table 5] As a result, in all the heating and cooking packages, the opening sound was quiet, and the contents could be heated without scattering.

<Comparative Example 3> The package for heating and cooking used in Example 3 (the distance between the tip of the non-heat-sealed portion and the inner edge of the heat seal), except that the seal width W0 at the tip of the non-heat-sealed portion was set to 20 mm. S: 2 mm), and was heated in a microwave oven. As a result, in the case of the package for heating and cooking having a W0 of 20 mm, the opening sound was large and the contents were scattered in microwave heating.

Example 4 A laminate of 12 μm polyethylene terephthalate / 15 μm nylon / 80 μm polypropylene (PP) was cut into a size of 130 mm × 170 mm, and the PP layers were heat-sealed on the inner surface with a heat seal width of 10 mm. One side pouch was made. 85 mm, 70 mm from the short side of the heat seal portion on the long side of this laminate
The non-heat-sealing portion 13 (the front end portion of the non-heat-sealing portion and the inner side of the heat-sealing portion) in which a semicircle having a diameter of 8 mm and a rectangle having a length of 4 mm and a width of 8 mm shown in FIG. Distance S: 2mm)
Was provided to obtain a package for heating and cooking. The package was filled with 180 g of curry and sealed to obtain a package for heating and cooking. The package was subjected to a pressurized steam retort treatment at 121 ° C. for 30 minutes, and a microwave heating test was performed. The results are shown in Table 6.

[0050]

[Table 6] As a result, there was no breakage by retort treatment in all the packages, and the opening sound was small in microwave heating,
There was no scattering of the contents.

<Comparative Example 4> The position where the non-heat-sealing portion 13 was provided was 50 mm from the short side of the long-side heat sealing portion.
A retort suitability and microwave heating test were performed using the same package as the heating cooking package described in Example 4 except that the package was located at a position of 40 mm. The results are shown in Table 7.

[0052]

[Table 7] As a result, in all the packages, there was no bag breakage and retort treatment was completed.However, in microwave heating, rupture occurred on the long side other than the non-heat-sealed part, the opening sound was loud, and the contents were scattered. did.

Example 5 A laminate of 12 μm polyethylene terephthalate / 15 μm nylon / 80 μm polypropylene film (PP) was cut into a size of 100 mm × 15 mm, and a PP layer was formed so that a heat-sealed portion was formed within a width of 10 × 15 mm. Each was heat-sealed on the inner surface to produce a seal part peel strength test piece shown in FIG. 5 (d). In the test piece, the shape of the heat seal portion is
When the length in the horizontal direction was (W) and the length in the vertical direction was (H), a rectangular heat seal portion of W × H was formed, and the peel strength was measured. W is 15, 10, 7.5 and 5 mm,
Table 8 shows the results when H was 10, 7.5 and 5 mm.

[0054]

[Table 8] Similarly, W and H were further subdivided, and from the obtained results,
Derive equation W> 13.77 ^{-0.3 883,} showing the relationship diagram in Fig.

Example 6 / Comparative Example 5 In the same manner as in Example 1, the non-heat-sealed portion shown in FIG. 5 was formed, and the distance S between the tip of the non-heat-sealed portion and the inner edge of the heat seal was set to 2
A microwave heating package having a shape of 0.5 mm and 0.5 mm was formed. The package was filled and sealed in the same manner as in Example 1, and a peeling test of the sealed portion and a microwave heating test were performed. The results are shown in Table 9.

[0056]

[Table 9] As a result, the shape with the distance S of 0.5 mm is a maximum of W15 and H0.5 in consideration of the rectangular heat seal of WH, and does not satisfy the relationship of WH. Further, the shape having a distance S of 2.0 mm is W15, H2 in the rectangular shape of WH.
And the relationship of WH is satisfied. From the test results, both shapes have no rupture in the microwave heating test, and the opening sound is small and good. However, when the distance S is 0.5 mm, the maximum seal strength of the seal portion must satisfy 23 N / 15 mm width or more. And has no suitability as a retort food package. Thus, the package for heating and cooking of the present invention,
It is important that the shape satisfy the relationship of the WH,
Thereby, it does not burst even by heating in a microwave oven, the opening sound is small, and it is possible to sufficiently cope with a retort food package.

[Brief description of the drawings]

FIG. 1 is a plan view showing a heat-sealed portion and a non-heat-sealed portion of a package for heating and cooking according to the present invention.

FIG. 2 is a plan view showing a suitable formation location of a non-heat-sealed portion in the package for heating and cooking according to the present invention.

FIG. 3 is a partial plan view for explaining a preferred shape of a non-heat-sealed portion in the package for heating and cooking according to the present invention.

FIG. 4 is an enlarged view showing a preferred example of a shape of a non-heat-sealed portion in the package for heating and cooking according to the present invention.

FIG. 5 is an explanatory diagram showing locations of test pieces for measuring the seal strength of the package for heating and cooking according to the present invention.

FIG. 6 is a W-H relationship diagram that satisfies a suitable sealing strength in the package for heating and cooking according to the present invention.

FIG. 7 is a perspective view showing the structure of a package for heating and cooking according to the prior art (a).

FIG. 8 is a perspective view showing the structure of a package for heating and cooking according to prior art (b).

[Explanation of symbols]

11 Package for Heat Cooking 12 Heat Sealing Part 12 'Inner Edge of Heat Sealing Part 13 Non-Heat Sealing Part 13' Seal Strength Decreased 14 Center of Outer Edge on Long Side t Point 1mm from Non-Heat Sealing Part Tip A Heating and Cooking Package Center of body P Tip of non-heat-sealed part R Suitable radius for forming non-heat-sealed part S Distance from inner edge of heat-sealed part to tip of non-heat-sealed part W0 Seal width at tip of non-heat-sealed part W1 From tip of non-heat-sealed part Width of non-heat-sealed part at 1mm point

 ────────────────────────────────────────────────── ─── Continued on front page F term (reference) 3E067 AB01 BA12A BB14A BB16A BB25A CA04 CA17 CA24 EA06 EC25 EE48 GB01 4F100 AK07 AK42 AK48 AR00B AT00A AT00C BA03 BA06 BA07 BA10A BA10C BA26 BA32 DB06 GB23 YK06B12

Claims (6)

[Claims] In a package for heating and cooking, at least one non-heat-sealing portion that opens to the outer edge side through a heat-sealing portion of 1 mm or more on the inner edge side is partially provided on one of the heat-sealing portions on the long side. A package for heating cooking, wherein the package is formed at several places. 2. The package for heating and cooking according to claim 1, wherein the width (W1) of the non-heat-sealed portion at a point 1 mm from the tip of the non-heat-sealed portion is less than 20 mm. 3. The length (W) of the heat seal portion in the width direction.
And the length (H) from the outer edge to the inner edge of the heat seal portion is
The package for heating and cooking according to claim 1 or 2, which satisfies the following relationship: W> 13.77H- ^0.3883 . 4. A seal width (W) at a tip of a non-heat-sealed portion.
The package for heating and cooking according to any one of claims 1 to 3, wherein 0) is 16 mm or less. 5. The method according to claim 1, wherein at least a part of the non-heat-sealed portion is
The heat seal portion on the long side of the package, wherein the heat seal portion is formed in a circumference having a radius corresponding to a shortest distance from the center of the package to the outer end on the long side. For heating and cooking. 6. The package according to claim 1, wherein the package is a retort pouch.
6. The package for heating and cooking according to any one of claims 5 to 5.