JP7115005B2 - Packaging bags for microwave heating and packaged foods - Google Patents

Description

TECHNICAL FIELD The present invention relates to a microwave oven heating packaging bag and a packaged food, and more particularly, a microwave oven heating packaging bag made of a heat-sealed laminated film, and an electronic packaging bag in which food is sealed and packaged in the packaging bag. It relates to packaged foods for microwave heating.

BACKGROUND ART Packaged foods for heating in a microwave oven, which contain retort foods, frozen foods, and the like, are widely used. When this packaged food is microwave-heated, the moisture contained in the contents evaporates with the heating, and the generated steam increases the pressure inside the packaging bag. If the pressure inside the packaging bag increases, there is a risk that the packaging bag will tear and the contents will scatter and contaminate the inside of the microwave oven. Therefore, a stand-type packaging bag having a steam release mechanism has been proposed in order to release the steam generated by microwave heating to the outside of the packaging bag (see, for example, Patent Document 1).

JP 2015-120550 A

A packaging bag such as that proposed in Patent Document 1 is filled with food mixed with seasonings from the beginning, and is subjected to heating such as retort heating and microwave heating. However, some seasonings lose their flavor and aroma when they are filled in a packaging bag together with food and heated. For example, seasonings such as sauces, flavored oils, and spices tend to lose their flavor when heated with food. Therefore, it is difficult to fill the packaging bag with the food from the beginning with the seasoning, and it is necessary to add the separately prepared seasoning after microwave heating the packaged food.

The present invention has been made in view of such circumstances, and its object is to retain the seasoning without contacting the food and to add the seasoning to the food during the microwave heating process. To provide a packaging bag for microwave heating and a packaged food.

In order to achieve the above object, the packaging bag of the first invention is manufactured as a standing pouch by heat-sealing a laminated film to form an accommodation space for accommodating the contents inside the packaging bag, and is made into a microwave oven. A packaging bag for heating in a microwave oven, wherein a seal part that can be peeled off by steam generated in the accommodation space during heating has a shape protruding inside the packaging bag,
As the storage space for storing the contents, a first storage space for storing the first content and a second storage space for storing the second content are formed inside the packaging bag,
As the peelable seal portion, a first protruding seal portion that can be peeled in order to release the steam in the first accommodation space to the outside of the packaging bag during microwave heating, and a second protruding seal portion in the second accommodation space during microwave heating. 2 a second protruding seal portion that can be peeled off in order to drop the contents into the first housing space;
Assuming that a straight line extending in the vertical direction of the standing pouch through the center of the maximum width of the first accommodation space is the central axis,
A lower end portion of the second projecting seal portion closest to the central axis is closer to the central axis than a lower end portion of the first projecting seal portion closest to the central axis.

The packaging bag of the second invention is manufactured as a standing pouch by forming an accommodation space for accommodating the contents inside the packaging bag by heat sealing the laminated film, and generating heat in the accommodation space during microwave heating. A packaging bag for heating in a microwave oven, wherein the sealing portion that can be peeled off by the steam generated has a shape protruding inside the packaging bag,
As the storage space for storing the contents, a first storage space for storing the first content and a second storage space for storing the second content are formed inside the packaging bag,
As the peelable seal portion, a first protruding seal portion that can be peeled in order to release the steam in the first accommodation space to the outside of the packaging bag during microwave heating, and a second protruding seal portion in the second accommodation space during microwave heating. 2 a second protruding seal portion that can be peeled off in order to drop the contents into the first housing space;
Assuming that a straight line extending in the vertical direction of the standing pouch through the center of the maximum width of the first accommodation space is the central axis,
A lower end portion of the second protruding seal portion closest to the central axis is located below a lower end portion of the first protruding seal portion closest to the central axis.

The packaging bag of the third invention is manufactured as a standing pouch by forming an accommodation space for accommodating the contents inside the packaging bag by heat-sealing the laminated film, and generating heat in the accommodation space during microwave heating. A packaging bag for heating in a microwave oven, wherein the sealing portion that can be peeled off by the steam generated has a shape protruding inside the packaging bag,
As the storage space for storing the contents, a first storage space for storing the first content and a second storage space for storing the second content are formed inside the packaging bag,
As the peelable seal portion, a first protruding seal portion that can be peeled in order to release the steam in the first accommodation space to the outside of the packaging bag during microwave heating, and a second protruding seal portion in the second accommodation space during microwave heating. 2 a second protruding seal portion that can be peeled off in order to drop the contents into the first housing space;
Assuming that a straight line extending in the vertical direction of the standing pouch through the center of the maximum width of the first accommodation space is the central axis,
A lower end portion of the second protruding seal portion closest to the central axis forms an acute angle smaller than a lower end portion of the first protruding seal portion closest to the central axis.

A packaging bag according to a fourth invention is the packaging bag according to any one of the first to third inventions, wherein the protrusion width of the second protruding seal portion with respect to the first accommodation space at the maximum width position of the first accommodation space is , is wider than the protrusion width of the first protruding seal portion with respect to the first accommodation space.

A packaging bag according to a fifth invention is characterized in that, in any one of the first to fourth inventions, the first protruding seal portion and the second protruding seal portion have the same sealing strength per unit area. do.

A packaging bag according to a sixth invention is the packaging bag according to any one of the first to fifth inventions, wherein the first protruding seal portion and the second protruding seal portion are positioned to face each other across a central axis, and , wherein each of the first protruding seal portion and the second protruding seal portion is connected to a seal portion forming the first accommodation space.

A packaging bag according to a seventh invention is the packaging bag according to any one of the first to fifth inventions, wherein steam in the first accommodation space escapes to the outside of the packaging bag through the second accommodation space during microwave heating. , the first protruding seal portion is surrounded by the second protruding seal portion.

A packaged food according to an eighth invention is a packaged food for heating in a microwave oven, and in the packaging bag according to any one of the first to seventh inventions, the food as the first content is contained in the first accommodation space. The container is sealed and packaged in a state of being housed inside the container, and a seasoning as the second content is sealed and packaged in a state of being housed in the second housing space.

According to the present invention, since the first and second protruding seal portions have a characteristic relationship with the lower end portion closest to the central axis, the seasoning is stored as the second content in the second storage space. can be held without coming into contact with the food stored as the first content in the first storage space, and furthermore, when the first protruding seal portion is peeled off during heating in the microwave oven, the steam in the first storage space The seasoning in the second housing space can be dropped into the first housing space by peeling the second protruding seal before the seasoning is released to the outside of the packaging bag, and the seasoning can be added to the food. Therefore, it is possible to keep the seasonings out of contact with the food and add the seasonings to the food during microwave heating. Even if the food is heated in a microwave oven, the flavor and aroma of the seasoning will not be lost because the seasoning will be thrown into the food by the action of gravity until the steam escapes from the packaging bag after the food is heated. .

BRIEF DESCRIPTION OF THE DRAWINGS The external view which shows 1st Embodiment of the packaging bag for a microwave oven heating, and a packaged food. FIG. 2 is a schematic diagram showing three specific examples of the basic structure of the packaging bag of FIG. 1; The external view which shows 2nd Embodiment of the packaging bag for a microwave oven heating, and a packaged food.

BEST MODE FOR CARRYING OUT THE INVENTION A packaging bag, packaged food, etc. according to embodiments of the present invention will be described below with reference to the drawings. In addition, the same reference numerals are given to the same parts or corresponding parts in each embodiment, specific example, etc., and duplication of explanation will be omitted as appropriate.

FIG. 1 schematically shows the external structures of a packaging bag 101 and a packaged food 201 according to the first embodiment. In FIG. 1, (A) is a plan view showing a stand-type packaging bag 101 in a folded state, and (B) shows a packaged food 201 in which a food F and a seasoning S are sealed in the packaging bag 101. It is a front view.

The packaging bag 101 is composed of three sheets, a front sheet 1A, a back sheet 1B, and a bottom sheet 1C, all of which are made of laminated films. Then, the laminated film is formed so that a first accommodation space 10 that accommodates the food F as the first content and a second accommodation space 20 that accommodates the seasoning S as the second content are formed inside the packaging bag. It is made into a standing pouch by heat sealing (thermal bonding) of . This heat-sealing is performed under sealing temperature conditions that do not impair the properties and functions of the product when the bag is made by a continuous bag-making machine that manufactures the actual product. A specific configuration of the laminated film will be described later.

The front sheet 1A and the back sheet 1B are heat-sealed at their right and left peripheries in a superimposed state, and the bottom sheet 1C folded in half is heat-sealed at their peripheries at the lower ends of the front sheet 1A and the back sheet 1B. ing. That is, in the packaging bag 101, the front sheet 1A and the back sheet 1B are heat-sealed to form a trunk seal portion 2, and the front sheet 1A and the back sheet 1B are heat-sealed to the bottom sheet 1C to form a bottom seal portion 3. is formed. In the upper portion of the body seal portion 2, linear cuts 2c are formed on the left and right peripheral edges to serve as starting points when opening the package. The shape of the cut 2c is not limited to a linear shape, and may be V-shaped, U-shaped, or the like.

A first protruding seal portion 12 and a second protruding seal portion 22 are formed on both sides of the upper portion of the packaging bag 101 so as to protrude inward from the body seal portion 2 forming the first accommodation space 10, respectively. formed. Further, if a straight line extending in the vertical direction of the packaging bag 101 (standing pouch) passing through the center of the maximum width of the first housing space 10 is taken as the center axis AX, the first protruding seal portion 12 and the second protruding seal portion 22 are aligned. They are positioned so as to face each other across the central axis AX. That is, on one side of the trunk seal portion 2, the first protruding seal portion 12 is integrally formed so as to form a U-shape and be connected to the trunk seal portion 2. On the other side, a second projecting seal portion 22 is formed integrally with the trunk seal portion 2 so as to form an L-shape.

By simultaneously heat-sealing the first protruding seal portion 12 and the body seal portion 2, the first protruding seal portion 12 and the body seal portion 2 are formed in a connected state, and the second protruding seal portion 22 and the body are formed. By performing heat sealing at the sealing portion 2 at the same time, the second protruding sealing portion 22 and the body sealing portion 2 are formed in a connected state. Also, the first protruding seal portion 12 and the second protruding seal portion 22 have the same sealing strength per unit area, and the width of the first and second protruding seal portions 12 and 22 is greater than the width of the body seal portion 2. is also narrower. The shape of the first protruding seal portion 12 is not limited to the U shape, and may be a trapezoidal shape, a V shape, or the like. , V-shaped, or the like.

The first protruding seal portion 12 and the second protruding seal portion 22 are formed so as to be detachable by steam V generated within the first housing space 10 during microwave heating. That is, the first protruding seal portion 12 is peelable in order to release the steam V in the first accommodation space 10 to the outside of the packaging bag (arrow mv in FIG. 1B) during microwave heating. The protruding seal portion 22 is peelable in order to drop the seasoning S in the second housing space 20 into the first housing space 10 (arrow ms in FIG. 1(B)) during microwave heating.

The upper ends of the front sheet 1A and the back sheet 1B are in an unsealed state (FIG. 1(A)). The first accommodation space 10 and the second accommodation space 20 are separated by a second projecting seal portion 22, and a first opening 11 for filling food F is formed above the first accommodation space 10. A second opening 21 for filling the seasoning S is formed above the second housing space 20 . Therefore, the seasoning S stored in the second storage space 20 can be held without coming into contact with the food F stored in the first storage space 10 .

Between the front sheet 1A and the back sheet 1B is formed the second accommodation space 20 separated from the first accommodation space 10 by the second protruding seal portion 22 as described above. Similarly, an unsealed portion 2a isolated from the first accommodation space 10 by the first projecting seal portion 12 is formed between the front sheet 1A and the back sheet 1B. This unsealed portion 2a constitutes a vaporization port 13 that opens from the trunk seal portion 2 toward the outside of the packaging bag. The steam vent 13 may be formed by cutting the unsealed portion 2a of the packaging bag 101 from the front sheet 1A and the back sheet 1B.

As described above, the first protruding seal portion 12 is peelable in order to release the steam V in the first housing space 10 to the outside of the packaging bag (arrow mv) during microwave heating. That is, the first protruding seal portion 12 protrudes inside the packaging bag to form the steam vent 13, thereby constituting a steam venting mechanism for the internal pressure opening type standing pouch. When the packaging bag 101 is heated in a microwave oven and is inflated by the steam V, the first protruding seal portion 12 is gradually retreated (peeled off) from the inside, and the inside of the packaging bag 101 is opened. This is a part that plays a role of a discharge path for the steam V in a state where it is connected to the outside.

In addition, as another example of the vapor venting mechanism that can be employed in the packaging bag 101, there is a ventilation chamber that does not contain the first content (food F), and a point seal that surrounds the ventilation chamber and isolates it from the first containing space 10. and holes or notches formed in the front sheet 1A and the back sheet 1B inside the point seal portions.

In the packaging bag 101, the unsealed portion 2b is formed at the same height position as the unsealed portion 2a in the body sealed portion 2 on the side where the second accommodation space 20 is formed. As a result, in the manufacturing process of the packaging bag 101, when cutting along the trunk seal portion 2 at the side end extending in the vertical direction (center axis AX direction) between the packaging bags 101 adjacent in the left-right direction, cutting can be performed with processing accuracy. Even if the position is displaced, the steam vent 13 can be reliably formed. Therefore, the unsealed portion 2b can be omitted as appropriate depending on the manufacturing method.

Since the first accommodation space 10 and the second accommodation space 20 are separated by the second protruding seal portion 22, as described above, the seasoning S accommodated in the second accommodation space 20 is separated from the first accommodation space. It is possible to hold the food F contained within 10 without contact. Moreover, since the second protruding seal portion 22 can be peeled off by steam V, if the conditions described later are satisfied, the second protruding seal portion 22 can be removed before the steam is removed (arrow mv) by peeling off the first protruding seal portion 12. The seasoning S in the second housing space 20 can be dropped into the first housing space 10 (arrow ms) by peeling off, and the seasoning S can be added to the food F.

The seasoning S filled in the second housing space 20 is a material (sauce, flavor oil, spice, etc.) that loses its flavor and aroma when it is filled in the packaging bag 101 together with the food F and heated, and is prepared separately. It is a common seasoning (preferably a liquid seasoning) that is added to the food F that has been heated in a microwave oven and served on tableware. Therefore, if the second protruding seal portion 22 is peeled off before the first protruding seal portion 12 is peeled off, there is no need to prepare the seasoning S separately.

As described above, assuming that a straight line passing through the center of the maximum width of the first accommodation space 10 and extending in the vertical direction of the packaging bag 101 (standing pouch) is the central axis AX, the packaging bag 101 is positioned on the basis of the central axis AX. The following three conditions (C1) to (C3) are satisfied.
(C1): The lower end portion 22a of the second protruding seal portion 22 closest to the central axis AX is located below the lower end portion 12a of the first protruding seal portion 12 closest to the central axis AX.
(C2): The lower end portion 22a of the second protruding seal portion 22 closest to the central axis AX is closer to the central axis AX than the lower end portion 12a of the first protruding seal portion 12 closest to the central axis AX.
(C3): The lower end portion 22a of the second protruding seal portion 22 closest to the central axis AX forms an acute angle smaller than the lower end portion 12a of the first protruding seal portion 12 closest to the central axis AX.

Condition (C1) is expressed by conditional expression (1) below, condition (C2) is expressed by conditional expression (2) below, and condition (C3) is expressed by conditional expression (4) below. Moreover, since the packaging bag 101 has a substantially rectangular shape and the maximum width of the first accommodation space 10 is the maximum distance between the left and right trunk seal portions 2, the condition (C2) is the following conditional expression (3): can also be expressed as That is, at the maximum width position of the first accommodation space 10, the protrusion width W2 of the second protrusion seal portion 22 with respect to the first accommodation space 10 is wider than the protrusion width W1 of the first protrusion seal portion 12 with respect to the first accommodation space 10. (L1+W1=L2+W2).
ΔH<0 (1)
L1>L2 (2)
W1<W2 (3)
θ1>θ2 (4)
however,
ΔH: Distance from the lower end 12a of the first protruding seal portion 12 closest to the central axis AX to the lower end 22a of the second protruding seal portion 22 closest to the central axis AX (the downward direction of the standing pouch is negative. ),
L1: the distance from the lower end portion 12a of the first projecting seal portion 12 closest to the central axis AX to the central axis AX;
L2: the distance from the lower end portion 22a closest to the central axis AX in the second protruding seal portion 22 to the central axis AX;
W1: the protrusion width of the first protruding seal portion 12 with respect to the first accommodation space 10 at the maximum width position of the first accommodation space 10;
W2: the protrusion width of the second protruding seal portion 22 with respect to the first accommodation space 10 at the maximum width position of the first accommodation space 10;
θ1: the angle (0°<θ1≦90°) formed by the lower end portion 12a of the first projecting seal portion 12 that is closest to the central axis AX;
θ2: the angle (0°<θ2<90°) formed by the lower end portion 22a of the second projecting seal portion 22 that is closest to the central axis AX;
is.

FIG. 2 schematically shows the basic structure of the packaging bag 101 with three specific examples. The packaged food X1 shown in FIG. 2(A) is a specific example that satisfies only the condition (C1) out of the three conditions (C1) to (C3) (ΔH<0, L1=L2, W1=W2, θ1=θ2=90°). The packaged food X2 shown in FIG. 2(B) is a specific example that satisfies only the condition (C2) out of the three conditions (C1) to (C3) (ΔH=0, L1>L2, W1<W2, θ1=θ2=90°). The packaged food X3 shown in FIG. 2(C) is a specific example that satisfies only the condition (C3) out of the three conditions (C1) to (C3) (ΔH=0, L1=L2, W1=W2, θ1>θ2).

Since the first and second protruding seal portions 12 and 22 protrude to the inside of the packaging bag (that is, to the side of the first accommodation space 10), when the internal pressure of the first accommodation space 10 increases due to the steam V, the stress caused by the steam V increases. (Dash double-dotted line and white arrow in FIG. 2) concentrate on the first and second protruding seal portions 12 and 22 . Then, if at least one of the three conditions (C1) to (C3) is satisfied, the second protruding seal portion 22 is peeled off before the first protruding seal portion 12 is peeled off.

Here, it is assumed that the first protruding seal portion 12 and the second protruding seal portion 22 have the same sealing strength per unit area. 2 (A) and (B)), the stress due to the steam V is applied to the lower end portion 22a of the second protruding seal portion 22 prior to the lower end portion 12a of the first protruding seal portion 12. The peeling of the second protruding seal portion 22 also starts first. Further, when the condition (C3) is satisfied (FIG. 2C), the stress due to the steam V concentrates on the acute-angled lower end portion 22a. Exfoliation begins. The longer the time from the peeling of the second protruding seal portion 22 to the peeling of the first protruding seal portion 12, the longer the contact time between the seasoning S and the food F. If the conditions are set so that the second protruding seal portion 22 is peeled off, it is possible to further suppress the influence of heating in the contact state.

When the packaged food 201 is produced using the packaging bag 101 (FIG. 1), the food F is filled into the first accommodation space 10 from the first opening 11, and the food F is filled into the second accommodation space 20 from the second opening 21. Fill with seasoning S. Then, as shown in FIG. 1B, the front sheet 1A and the back sheet 1B are heat-sealed at their upper ends to form a top seal portion 4, and if necessary, a treatment such as retort heating is performed, whereby the food F is processed. A packaged food 201 sealed and packaged with the seasoning S contained in the first and second containing spaces 10 and 20, respectively, is obtained. Note that the use of the packaging bag 101 is not limited to retort packaging. Depending on the specific sterilization process and distribution mode, it is for boiling sterilization at a lower temperature (100°C or less) than for retort packaging, for hot packs that sterilize the inner surface of the packaging bag only by raising the temperature of the contents, and for distribution without heat treatment. Applications include refrigeration.

When eating the food F, the packaged food 201 is set in a microwave oven in a stand state and heated. When the heating in the microwave oven is finished, the packaged food 201 is opened by tearing the upper portion of the packaging bag 101 from the cut 2c, and the food F in the first accommodation space 10 is transferred to the tableware. The direction perpendicular to the direction of the central axis AX (the width direction of the film) (the flow direction of the film) is aligned with the easy-to-tear linear direction of the sheets 1A and 1B (the tearing direction from the cut 2c). is set.

When the packaged food 201 is heated in the microwave oven as described above and the steam V is generated from the food F, the internal pressure of the first housing space 10 is increased. Since the first and second protruding seal portions 12 and 22 protrude toward the first accommodation space 10 side, the stress due to the steam V concentrates on the first and second protruding seal portions 12 and 22 . As a result, the first and second protruding seal portions 12 and 22 are peeled off without the trunk seal portion 2 being peeled off. At this time, the fact that the width of the first and second protruding seal portions 12 and 22 is narrower than the width of the trunk seal portion 2 is advantageous for peeling off of the first and second protruding seal portions 12 and 22. works.

Since the packaging bag 101 satisfies at least one of the conditions (C1) to (C3) described above, the stress due to the steam V is applied to the second protruding seal portion 12 before the lower end portion 12a of the first protruding seal portion 12. Either the lower end portion 22a of the portion 22 is applied, or the stress due to the steam V concentrates on the acute lower end portion 22a, and as a result, the peeling of the second protruding seal portion 22 begins before the first protruding seal portion 12 does. Due to the peeling of the second protruding seal portion 22 , the seasoning S in the second housing space 20 drops into the first housing space 10 (arrow ms) and hangs on the food F.

After peeling of the second projecting seal portion 22, when the stress due to the steam V concentrates on the lower end portion 12a of the first projecting seal portion 12, peeling of the first projecting seal portion 12 starts. As a result, the first accommodation space 10 communicates with the unsealed portion 2a, and the high-pressure steam V flows from the first accommodation space 10 into the vaporization port 13, and is exhausted from the vaporization port 13 to the outside of the packaging bag 101. be. In this way, since the first protruding seal portion 12 is provided so as to form the steam vent 13 leading to the outside, the increase in internal pressure due to microwave heating causes the first accommodation space 10 to communicate with the outside of the packaging bag, thereby steaming. A vapor release mechanism for exhausting V can be easily realized. Since this steam venting mechanism is arranged above the first housing space 10, the food F is prevented from leaking through the steam vent 13 when the steam V is exhausted from the steam vent 13.

FIG. 3 schematically shows the external structures of the packaging bag 102 and the packaged food 202 according to the second embodiment. In FIG. 3, (A) is a plan view showing the stand-type packaging bag 102 in a folded state, and (B) shows a packaged food 202 in which food F and seasoning S are sealed in the packaging bag 102. It is a front view. The feature of the second embodiment resides in the arrangement of the second projecting seal portion 22, and the other portions are configured in the same manner as in the first embodiment, and the effects thereof are also the same. Therefore, the arrangement of the second projecting seal portion 22 and its related parts will be mainly described.

A first protruding seal portion 12 and a second protruding seal portion 22 are formed on one side of the upper portion of the packaging bag 102 so as to protrude inward from the body seal portion 2 forming the first accommodation space 10 . ing. That is, on one side of the trunk seal portion 2, the first projecting seal portion 12 is integrally formed in a U-shape so as to be connected to the trunk seal portion 2. A second protruding seal portion 22 having an L-shape is integrally formed so as to be connected to the trunk seal portion 2 .

The double structure in which the second protruding seal portion 22 surrounds the first protruding seal portion 12 can be configured by moving the second protruding seal portion 22 of the packaging bag 101 symmetrically with respect to the central axis AX. . According to this double structure, the steam V in the first housing space 10 escapes to the outside of the packaging bag through the second housing space 20 during microwave heating. The two-protruding seal portion 22 can be reliably peeled off.

In the packaging bag 102 as well, the first accommodation space 10 and the second accommodation space 20 are separated by the second protruding seal portion 22, so the seasoning S accommodated in the second accommodation space 20 is stored in the first accommodation space. It is possible to hold the food F contained in the space 10 without coming into contact with it. Moreover, since the second protruding seal portion 22 can be peeled off by the steam V, if the above conditions (C1) and (C2) are satisfied, the double structure of the first and second protruding seal portions 12 and 22 allows the first The peeling of the second protruding seal portion 22 can be reliably performed before the steam is removed (arrow mv) by peeling the protruding seal portion 12 . By peeling off the second projecting seal portion 22, the seasoning S in the second housing space 20 can be dropped into the first housing space 10 (arrow ms), and the seasoning S can be added to the food F.

When the packaged food 202 is produced using the packaging bag 102 (FIG. 3), the food F is filled into the first accommodation space 10 through the first opening 11, and the food F is filled into the second accommodation space 20 through the second opening 21. Fill with seasoning S. Then, as shown in FIG. 3(B), the front sheet 1A and the back sheet 1B are heat-sealed at their upper ends to form a top seal portion 4, and if necessary, a treatment such as retort heating is performed to obtain the food F. A packaged food 202 is obtained in which the seasoning S is contained in the first and second containing spaces 10 and 20 respectively and sealed. When eating the food F, the packaged food 202 is set in a microwave oven in a stand state and heated. When the heating in the microwave oven is finished, the packaged food 202 is opened by tearing the upper portion of the packaging bag 102 from the cut 2c, and the food F in the first accommodation space 10 is transferred to tableware.

When the packaged food 202 is heated in the microwave oven as described above and the steam V is generated from the food F, the internal pressure of the first accommodation space 10 is increased. Since the second protruding seal portion 22 protrudes toward the first housing space 10 , the stress due to the steam V concentrates on the lower end portion 22 a of the second protruding seal portion 22 . As a result, the second protruding seal portion 22 is peeled off without the trunk seal portion 2 being peeled off. At this time, the fact that the width of the second protruding seal portion 22 is narrower than the width of the body seal portion 2 acts advantageously against the peeling of the second protruding seal portion 22 .

Since the packaging bag 102 has a double structure of the first and second protruding seal portions 12, 22 by satisfying the conditions (C1) and (C2), the sharp lower end portion 22a satisfying the condition (C3) The stress due to the steam V concentrates on , and peeling of the second protruding seal portion 22 starts before the first protruding seal portion 12 . Due to the peeling of the second protruding seal portion 22 , the seasoning S in the second housing space 20 drops into the first housing space 10 (arrow ms) and hangs on the food F.

After peeling of the second projecting seal portion 22, when the stress due to the steam V concentrates on the lower end portion 12a of the first projecting seal portion 12, peeling of the first projecting seal portion 12 starts. As a result, the second accommodation space 20 communicates with the unsealed portion 2a, and the high-pressure steam V flows from the first accommodation space 10 through the second accommodation space 20 into the steam port 13, and the high-pressure steam V flows from the steam port 13. The air is exhausted to the outside of the packaging bag 102 . In this way, since the first protruding seal portion 12 is provided so as to form the steam vent 13 leading to the outside, the internal pressure rise due to microwave heating causes the first accommodation space 10 and the second accommodation space 20 to separate into the packaging bag. It is possible to easily realize a steam venting mechanism for venting the steam V through the outside.

As specific examples of the sheets 1A, 1B, and 1C, their general laminated structures are shown below in the format of base layer/intermediate layer/sealant layer from the outside of the packaging bag to the inside of the packaging bag.
Transparent VMPET12/ONY15/CPP(60,70)
PET12/transparent VMPET12/CPP(60,70)
However, the details of each layer in the above schematic laminated structure are as follows:
PET12: polyethylene terephthalate (PET) film, thickness 12 μm,
Transparent VMPET12: Transparent vapor-deposited PET film, thickness 12 μm (water vapor barrier: 0.5 g/m ² ·day, oxygen barrier: 0.5 cc/m ² ·atm · day),
ONY15: biaxially oriented nylon, thickness 15 µm,
CPP (60, 70): Unstretched polypropylene (CPP) film, thickness 60 μm, 70 μm,
is.

Specific examples of the substrate layer include polyester films such as polyethylene terephthalate (PET) film and polybutylene terephthalate (PBT) film, and a silica deposition layer serves as a barrier layer that prevents permeation of water vapor, oxygen, and the like. A functioning biaxially oriented transparent vapor-deposited polyethylene terephthalate film may be formed to a thickness of about 12 μm as the base layer. The thickness of the substrate layer is preferably 9-20 μm, more preferably 12-15 μm. If the thickness of the substrate layer is 9 μm or more, better dimensional stability and heat resistance can be obtained, and if it is 20 μm or less, better bending resistance can be obtained. In addition, even if the substrate layer is not composed of a special film (co-extruded film, etc.), it is possible to reduce the cost by using a single-layer structure composed only of a polyester-based film.

Specific examples of the intermediate layer include polyamide films such as biaxially oriented nylon and transparent vapor-deposited polyethylene terephthalate films. By including a polyamide film in the laminated film, it is possible to obtain excellent resistance to piercing from the corners of other packaging bags during transportation, impact transmitted to the packaging bag, and bending due to the impact. be. Alternatively, silica or the like may be vapor-deposited on a biaxially oriented nylon film having a thickness of about 15 .mu.m to form an intermediate layer to prevent permeation of water vapor, oxygen, and the like.

A specific example of a sealant layer is a heat-adhesive unstretched polypropylene (CPP) film. Since the CPP film has excellent heat resistance, it can be used even when food that becomes hot when heated in a microwave oven is accommodated in the packaging bag 101 . The thickness of the sealant layer is preferably 40-200 μm, more preferably 50-80 μm. The sealant layer whose thickness is set within these ranges is excellent in impact resistance against drops that may occur in the distribution process of the packaged food 201, and is easy to handle such as ease of filling and taking out of the contents. is also excellent. The sealant layer is provided for sealing by laminating two laminated films on top of each other and heat-sealing the opposing peripheral edges. Therefore, when the bag is made, it will be located on the innermost side of the packaging bag.

According to the first and second embodiments, at least one of the conditions (C1) to (C3) for the lower end portions 12a and 22a of the first and second projecting seal portions 12 and 22 closest to the center axis AX. 1, the seasoning S stored in the second storage space 20 as the second content is stored in the first storage space 10 as the first content. It can be held without contact with the food F, and furthermore, before the steam V in the first accommodation space 10 escapes to the outside of the packaging bag due to the peeling of the first protruding seal portion 12 during heating in the microwave oven, the second protrusion The seasoning S in the second housing space 20 can be dropped into the first housing space 10 by peeling the seal portion 22 , and the seasoning S can be added to the food F. Therefore, it is possible to keep the seasoning S without coming into contact with the food F and add the seasoning S to the food F during microwave heating. Even if the food is microwaved, the flavor and aroma of the seasoning S are lost because the seasoning S is put into the food F by the action of gravity until the steam V escapes from the packaging bag after the food is heated. will not be

In the first embodiment, the first protruding seal portion 12 and the second protruding seal portion 22 are positioned to face each other across the central axis AX, and the first protruding seal portion 12 and the second protruding seal portion 22 are connected to the body seal portion 2 that constitutes the first housing space 10, it is possible to prevent the introduction of the seasoning S and the removal of the steam from being affected by each other.

In the second embodiment, the first protruding seal portion 12 is replaced by the second protruding seal portion so that the steam V in the first accommodation space 10 escapes to the outside of the packaging bag through the second accommodation space 20 during microwave heating. 22, the second projecting seal portion 22 can be reliably peeled off before the first projecting seal portion 12 is peeled off. In addition, a large first housing space 10 can be ensured.

As can be seen from the above description, each embodiment described above includes the following characteristic configurations (#1) to (#5).

(#1): By heat-sealing the laminated film, a storage space for storing the contents is formed inside the packaging bag, and the bag is manufactured as a standing pouch. A microwave oven heating packaging bag formed so that the possible sealing portion has a shape protruding inside the packaging bag,
As the storage space for storing the contents, a first storage space for storing the first content and a second storage space for storing the second content are formed inside the packaging bag,
As the peelable seal portion, a first protruding seal portion that can be peeled in order to release the steam in the first accommodation space to the outside of the packaging bag during microwave heating, and a second protruding seal portion in the second accommodation space during microwave heating. and a second projecting seal portion that can be peeled off to drop the contents into the first housing space, and satisfies at least one of the following conditional expressions (1) to (4): A packaging bag characterized by:
ΔH<0 (1)
L1>L2 (2)
W1<W2 (3)
θ1>θ2 (4)
However, if a straight line extending in the vertical direction of the standing pouch passing through the center of the maximum width of the first accommodation space is taken as the central axis,
ΔH: the distance from the lower end of the first protruding seal portion closest to the central axis to the lower end of the second protruding seal portion closest to the central axis (the downward direction of the standing pouch is negative);
L1: the distance from the lower end of the first protruding seal portion closest to the center axis to the center axis;
L2: the distance from the lower end of the second protruding seal portion closest to the center axis to the center axis;
W1: width of protrusion of the first protruding seal portion with respect to the first housing space at the maximum width position of the first housing space;
W2: width of protrusion of the second protruding seal portion with respect to the first housing space at the maximum width position of the first housing space;
θ1: the angle (0°<θ1≦90°) formed by the lower end portion closest to the center axis in the first protruding seal portion;
θ2: the angle (0°<θ2<90°) formed by the lower end portion closest to the central axis in the second protruding seal portion;
is.

(#2): The packaging bag according to (#1), wherein the first protruding seal portion and the second protruding seal portion have the same sealing strength per unit area.

(#3): The first protruding seal portion and the second protruding seal portion are positioned to face each other across the central axis, and each of the first protruding seal portion and the second protruding seal portion The packaging bag according to (#1) or (#2), characterized in that the packaging bag is connected to the sealing portion that constitutes the first accommodation space.

(#4): The first protruding seal portion is surrounded by the second protruding seal portion so that steam in the first housing space escapes to the outside of the packaging bag through the second housing space during microwave heating. The packaging bag according to (#1) or (#2), characterized in that

(#5): A packaged food for heating in a microwave oven, wherein in the packaging bag according to any one of (#1) to (#4), the food as the first content is contained in the first accommodation space. A packaged food characterized by being sealed and packaged in a state of being accommodated in the second accommodation space, and wherein a seasoning as the second content is hermetically packaged in a state of being accommodated in the second accommodation space.

1A front sheet (laminated film)
1B back sheet (laminated film)
1C bottom sheet (laminated film)
2 trunk seal portion 2a unsealed portion (steam release mechanism)
2b Unsealed portion 2c Notch 3 Bottom seal portion 4 Top seal portion 10 First accommodation space 11 First opening 12 First projecting seal portion (steam release mechanism)
12a Lower end 13 Vapor opening (vapor release mechanism)
20 Second accommodation space 21 Second opening 22 Second projecting seal 22a Lower end 101, 102 Packaging bag 201, 202 Packaged food X1 to X3 Packaged food F Food (first content)
S seasoning (second content)
V Steam AX Central axis

Claims (8)

By heat - sealing the laminated film, a storage space for containing the contents is formed inside the packaging bag, and the bag is manufactured as a standing pouch. A microwave oven heating packaging bag formed to have a protruding shape,
As the storage space for storing the contents, a first storage space for storing the first content and a second storage space for storing the second content are formed inside the packaging bag,
As the peelable seal portion, a first protruding seal portion that can be peeled in order to release the steam in the first accommodation space to the outside of the packaging bag during microwave heating, and a second protruding seal portion in the second accommodation space during microwave heating. 2 a second protruding seal portion that can be peeled off in order to drop the contents into the first housing space;
The first protruding seal portion and the second protruding seal portion are formed to be detachable by steam generated in the first housing space during microwave heating,
When the internal pressure of the first accommodation space rises due to the steam generated in the first accommodation space during microwave heating, the stress due to the steam concentrates on the first protruding seal portion and the second protruding seal portion, The first protruding seal portion and the second protruding seal portion have a shape protruding inside the packaging bag,
Assuming that a straight line extending in the vertical direction of the standing pouch through the center of the maximum width of the first accommodation space is the central axis,
A packaging bag, wherein a lower end portion of the second protruding seal portion closest to the central axis is closer to the central axis than a lower end portion of the first protruding seal portion closest to the central axis. By heat - sealing the laminated film, a storage space for containing the contents is formed inside the packaging bag, and the bag is manufactured as a standing pouch. A microwave oven heating packaging bag formed to have a protruding shape,
As the storage space for storing the contents, a first storage space for storing the first content and a second storage space for storing the second content are formed inside the packaging bag,
As the peelable seal portion, a first protruding seal portion that can be peeled in order to release the steam in the first accommodation space to the outside of the packaging bag during microwave heating, and a second protruding seal portion in the second accommodation space during microwave heating. 2 a second protruding seal portion that can be peeled off in order to drop the contents into the first housing space;
The first protruding seal portion and the second protruding seal portion are formed to be detachable by steam generated in the first housing space during microwave heating,
When the internal pressure of the first accommodation space rises due to the steam generated in the first accommodation space during microwave heating, the stress due to the steam concentrates on the first protruding seal portion and the second protruding seal portion, The first protruding seal portion and the second protruding seal portion have a shape protruding inside the packaging bag,
Assuming that a straight line extending in the vertical direction of the standing pouch through the center of the maximum width of the first accommodation space is the central axis,
A packaging bag, wherein a lower end portion of the second protruding seal portion closest to the central axis is positioned below a lower end portion of the first protruding seal portion closest to the central axis. By heat - sealing the laminated film, a storage space for containing the contents is formed inside the packaging bag, and the bag is manufactured as a standing pouch. A microwave oven heating packaging bag formed to have a protruding shape,
As the storage space for storing the contents, a first storage space for storing the first content and a second storage space for storing the second content are formed inside the packaging bag,
As the peelable seal portion, a first protruding seal portion that can be peeled in order to release the steam in the first accommodation space to the outside of the packaging bag during microwave heating, and a second protruding seal portion in the second accommodation space during microwave heating. 2 a second protruding seal portion that can be peeled off in order to drop the contents into the first housing space;
The first protruding seal portion and the second protruding seal portion are formed to be detachable by steam generated in the first housing space during microwave heating,
When the internal pressure of the first accommodation space rises due to the steam generated in the first accommodation space during microwave heating, the stress due to the steam concentrates on the first protruding seal portion and the second protruding seal portion, The first protruding seal portion and the second protruding seal portion have a shape protruding inside the packaging bag,
Assuming that a straight line extending in the vertical direction of the standing pouch through the center of the maximum width of the first accommodation space is the central axis,
A packaging bag, wherein a lower end portion of the second projecting seal portion closest to the central axis forms an acute angle smaller than a lower end portion of the first projecting seal portion closest to the central axis. At the maximum width position of the first accommodation space, the protrusion width of the second protrusion seal portion with respect to the first accommodation space is wider than the protrusion width of the first protrusion seal portion with respect to the first accommodation space. The packaging bag according to any one of claims 1 to 3. The packaging bag according to any one of claims 1 to 4, wherein the first protruding seal portion and the second protruding seal portion have the same sealing strength per unit area. The first protruding seal portion and the second protruding seal portion are positioned to face each other across the central axis, and the first protruding seal portion and the second protruding seal portion define the first housing space. 6. The packaging bag according to any one of claims 1 to 5, characterized in that it is connected to the constituting seal portion. The first protruding seal portion is surrounded by the second protruding seal portion so that steam in the first housing space escapes to the outside of the packaging bag through the second housing space during microwave heating. The packaging bag according to any one of claims 1 to 5. A packaged food for heating in a microwave oven, wherein in the packaging bag according to any one of claims 1 to 7, the food as the first content is sealed and packaged in the first accommodation space. , wherein a seasoning as the second content is contained in the second containing space and is sealed and packaged.

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