JP6586771B2 - Packaging for microwave oven heating - Google Patents

Description

  The present invention relates to a packaging body in which a pouch containing contents is further accommodated in an outer box and cooked by heating in a microwave oven without taking out the pouch from the outer box.

  A pouch containing contents such as curry, which is cooked in a microwave oven as it is, that is, without being taken out, is well known. Such a pouch usually has a steam vent in a part thereof. This steam vent is closed before microwave heating, so the contents are sealed inside the pouch. And if it heats with a microwave oven as it is, since a vapor | steam will be generated with a heating and the internal pressure of a pouch will increase, a vapor | steam vent part will open and vapor | steam will be discharge | released out of a pouch.

  There are many types of structures for such a steam vent, but in any structure, when heating in a microwave oven, the pouch is mounted so that the steam vent is located above the pouch. Need to be placed. If the steam vent is not placed above, the contents may leak from the steam vent opened by microwave heating or may be ejected by internal pressure.

  By the way, if the microwave oven is heated with the pouch in this manner, the temperature of the contents rises and the high temperature is transmitted to the outer surface of the pouch as it is, so that this pouch is also heated to a high temperature.

  Therefore, a packaging body is also known in which the pouch is further accommodated in an outer box such as a paper box and the microwave oven is heated as it is. If the microwave oven is heated in the outer box, the paper box is excellent in heat insulation, so that the outer surface does not become high temperature and can be safely taken out from the microwave oven.

  Thus, even when the pouch containing the contents is accommodated in the outer box and heated as it is, it is necessary to place the pouch in the microwave oven so that the steam vent is located above the pouch. Therefore, Patent Document 1 discloses a packaging body in which a vapor venting part moves above the pouch as the pressure inside the pouch increases when placed in a microwave oven and heated.

  The package described in Patent Document 1 has a structure as shown in FIGS. 8 (a) and 8 (b). That is, the exterior box 1 has a rectangular parallelepiped shape, and an opening weak line 11 a is provided on a part of the upper surface plate 11. The opening fragile line 11a is a line that passes through the inside of the upper surface plate 11 from the boundary 1n between the upper surface plate 11 and the side surface plate 14 and reaches the boundary 1n between the upper surface plate 11 and the side surface plate 14 again. Then, a substantially trapezoidal region surrounded by the opening weak line 11a and the boundary 1n is used as an opening tab 112, and the pouch 2 is accommodated so that the steam release portion 2a faces the opening tab 112.

  Therefore, when the package is placed in a microwave oven and heated, as shown in FIGS. 9 (a) and 9 (b), the internal pressure of the pouch 2 increases due to the generation of steam accompanying the heating, and the steam expands. The opening 2a is opened and steam is released. The opening weakening line 11a is broken by the expansion pressure of the pouch 2 and the discharge pressure of the steam, and the opening tab 112 is pushed up to open the exterior box 1. And the expansion | swelling site | part of the pouch 2 moves upwards from this opening part 11b, a vapor | steam is discharge | released to the exterior of the pouch 2 from the vapor | steam vent part 2a arrange | positioned in the site | part which moved upwards, and the exterior box 1 from the opening part 11b Released out of the water. For this reason, even if it heats a microwave oven as it is, without adding any processing before mounting inside a microwave oven, the vapor extraction part 2a moves upwards with the expansion | swelling or discharge | release of a vapor | steam by heating. .

Japanese Patent No. 5062409

  As described above, in the package described in Patent Document 1, the steam vent portion of the pouch moves upward as the microwave oven is heated, so that the contents do not leak or blow out. Since the microwave oven can be heated as it is, there is an advantage that the outer box can be safely taken out from the microwave oven without becoming high temperature.

  However, even with this package, when the package is taken out from the microwave oven, the contents may be spilled by being tilted by mistake.

  Therefore, an object of the present invention is to provide a packaging body in which a pouch containing the contents is further accommodated in an outer box, and there is no risk that the contents will accidentally spill.

That is, the invention described in claim 1 is a package that includes a pouch containing contents and an outer box containing the pouch, and is heated and cooked in a microwave oven while the pouch is stored in the outer box. There,
Wherein an opening line of weakness is provided on the top plate of the outer box, a region surrounded by the opening line of weakness and the line connecting the both ends as the opening tab, steam discharge portion is constituted by the opening tab And
The pouch has a steam vent for discharging steam generated by microwave heating, and the exterior box has a see-through window in a region outside the opening tab, through which the steam vent can be seen from the outer surface. It is the package for the microwave oven heating characterized.

  Next, the invention according to claim 2 is characterized in that the see-through window is composed of a through hole provided in the outer box and a transparent film adhered to cover the through hole. It is the packaging body for microwave ovens of description.

  The invention described in claim 3 is the microwave oven heating package according to claim 2, wherein the transparent film has heat resistance.

  The invention according to claim 4 is characterized in that the outer box has a vapor discharge part that opens due to expansion of the pouch or pressure of the vapor accompanying microwave heating. It is the packaging body for microwave ovens of description.

The invention of claim 5, wherein the outer instrumentation boxes, located below the vapor release of the pouch, claim 1-4, characterized in that it comprises a pillow section to tilt the package It is the package for microwave oven heating as described in above.

The invention according to claim 6, microwave heating package according to any one of claims 1 to 5, wherein the outer instrumentation box is characterized by being composed of a laminate comprising a paper or paper It is.

  According to the present invention, since the exterior box has a see-through window through which the steam vent of the pouch can be seen from the outer surface, the position of the steam vent is clear. For this reason, when taking out from a microwave oven, it can prevent accidentally tilting and spilling the contents.

FIG. 1 relates to a first embodiment of the package of the present invention, FIG. 1 (a) is a perspective view for explanation, and FIG. 1 (b) is a sectional view for explanation. FIGS. 2A to 2F are explanatory plan views showing examples of fluoroscopic windows, respectively. FIGS. 3A and 3B illustrate a method of using the first embodiment of the package of the present invention. FIG. 3A is a perspective view for explanation, and FIG. 3B is a cross-sectional view for explanation. FIG. 4 is a development view showing a blank of the outer box according to the first embodiment of the present invention. FIG. 5 is related to 2nd embodiment of the package of this invention, FIG. 5 (a) is a perspective view for description, FIG.5 (b) is sectional drawing for description. FIG. 6 is a development view showing a blank of the outer box according to the second embodiment of the present invention. 7A to 7D are explanatory front views showing examples of pouches. FIG. 8 relates to a conventional package, FIG. 8 (a) is a perspective view for explanation, and FIG. 8 (b) is a sectional view for explanation. FIGS. 9A and 9B illustrate a method for using a conventional package. FIG. 9A is a perspective view for explanation, and FIG. 9B is a sectional view for explanation.

  Hereinafter, specific examples of the present invention will be described with reference to the drawings. FIG. 1 relates to a first specific example of the present invention, FIG. 1 (a) is a perspective view for explaining the same, and FIG. 1 (b) is a sectional view for explaining. It should be noted that each of these drawings is for explanation, and is not illustrated accurately.

  As shown in FIGS. 1 (a) and 1 (b), the packaging body of the present invention includes a pouch 2 that contains the contents 3 and an exterior box 1 that contains the pouch as essential components. . The pouch 2 is provided with a steam vent 2a for discharging steam generated by heating the microwave oven. The structure of the vapor vent 2a will be described later. Further, the exterior box 1 is provided with a see-through window through which the vapor vent 2a can be seen through from the outer surface. In this example, a through-hole 113 is provided in the exterior box 1, and the see-through window is provided by covering the through-hole 113 with the transparent film 4 and bonding them. The transparent film 4 preferably has heat resistance. For example, a biaxially stretched polyester film can be used.

  In this example, the through hole 113 has a circular shape, but any shape of the through hole 113 can be used. FIG. 2 shows examples of various through holes 113. 2A is a circular through hole 113, FIG. 2B is an oval through hole 113, FIG. 2C is a polygonal through hole 113, and FIG. 2D is a cross shape. 2 (e) is an example of a parallelogram-shaped through hole 113, and FIG. 2 (f) is an example of a cloud-shaped through hole 113.

In this example, the opening weak line 11 a is provided on the upper surface plate 11 of the outer box 1. The opening fragile line 11a is a line that passes through the inside of the upper surface plate 11 from the boundary 1n between the upper surface plate 11 and the side surface plate 14 and reaches the boundary 1n between the upper surface plate 11 and the side surface plate 14 again. A region surrounded by the line 11a and the boundary 1n is used as an opening tab 112, and the opening fragile line 11a and the opening tab 112 constitute a vapor discharge portion. However, the opening weak line 11a divides the top plate 11 into the opening tab 112 and the region 111 outside thereof, and the start point and the end point do not need to be located at the boundary 1n. It is sufficient if the area surrounded by the opening weak line 11a and the line connecting the both ends thereof can be separated from the other areas 111 as the opening tab 112. For the same reason, it is not necessary to configure the opening weak line 11a by connecting a curved line and a straight line. For example, straight lines may be connected to each other, or only curved lines.

  By the way, although the steam vent 2a of the pouch 2 can be disposed at a position facing the opening tab 112, it can also be disposed at a position facing the region 111 outside the opening tab 112. In this example, the steam vent 2 a is provided at a position facing the outer region 111. Since steam is released from the steam vent 2a of the pouch 2 when the microwave oven is heated, the area around the steam vent 2a is directly heated by the steam and becomes high temperature. When it is provided at a position facing the outer region 111, the portion exposed from the opening 11b, which will be described later, does not have a high temperature because there is no steam vent 2a, and the pouch 2 can be safely removed from the outer box 1 by grasping this portion. It can be taken out. Accordingly, the see-through window is also provided at a position facing the outer region 111. And even if it is a case where the steam release part 2a is not arrange | positioned in the position which faces the tab 112 for opening in this way, the opening weak line 11a is fractured | ruptured by the expansion pressure of the pouch 2 accompanying a microwave oven heating, and it opens. The tab 112 is pushed up, the opening 11b is opened, and the steam can be discharged to the outside of the outer box 1.

  This package can be used by a method as shown in FIG. That is, first, the steam vent 2a is confirmed from the transparent window, and is placed in the microwave oven so that the steam vent 2a is located on the upper surface side. When the microwave oven is heated, the internal pressure of the pouch 2 increases due to the generation of steam accompanying the heating, and the steam vent 2a opens to release the steam. In addition, the opening fragile line 11a is broken by the discharge pressure of the steam, and the opening tab 112 is pushed up to open the exterior box 1. And it discharge | releases out of the exterior box 1 from this opening part 11b.

  The outer box 1 can be manufactured by assembling the blank shown in FIG. That is, this blank has a structure in which the side plate 14, the top plate 11, the side plate 12, and the bottom plate 13 are connected in this order, and there is a fold line between the plates 14, 11, 12, and 13. Is provided. The top plate 11 is provided with inner side plates 15a and 16a, and the bottom plate 13 is provided with outer side plates 15b and 16b. Further, the upper surface plate 11 is provided with an opening weak line 11a, and the opening tab 112 is separated from the other regions 111 by the opening weak line 11a. Each of the plates 14, 12, 13 is provided with adhesive pieces 14x, 14y, 12x, 12y, 13x.

  The blank is assembled as follows. That is, first, a sack is applied so that the side plate 14 overlaps the outside of the adhesive piece 13x to form a cylinder. Next, this cylindrical blank is raised and bonded so that the outer side surface plate 15b overlaps the outer side of the inner side surface plate 15a to form one side surface. Then, using the opened side as an entrance, the pouch 2 is automatically filled, and finally, the outer side plate 16b is bonded to the outer side of the inner side plate 16a so that the outer side plate 16b is overlapped, and the outer box 1 is assembled. Can do.

  Next, FIGS. 5A and 5B show a second specific example of the package of the present invention, which is the same as the first specific example except that the outer box 1 has a pillow portion 17. . For convenience of explanation, first, the blank will be described. As shown in FIG. 6, the blank includes an outer side plate 15b closer to the see-through window 113, a folded plate 171, a support plate 172, and an insertion plate. 173 are connected in this order, and a folding line is provided between the folded plate 171, the support plate 172, and the insertion plate 173. Further, the bottom plate 13 is provided with a notch 13a for insertion. Then, as shown in FIG. 5 (b), the folded plate 171 is folded and overlapped on the outer surface of the outer side surface plate 15b and protruded downward, and then the support plate 172 and the insertion plate 173 are sequentially folded to obtain the difference. By inserting the tip of the insert piece 173 into the insertion cut 13 a of the bottom plate 13 and fixing it, the pillow portion 17 can be formed under the steam release portion 2 a of the pouch 2. When the outer box 1 in which the pillow portion 17 is thus formed is placed inside the microwave oven, the outer box 1 is placed with an inclination with respect to the placement surface of the microwave oven, and the steam vent 2a of the pouch 2 is placed. Is positioned above. For this reason, even when the microwave oven is heated, the contents 3 are not spilled from the vapor vent 2a.

Next, this exterior box 1 can be comprised with the laminated body containing paper or paper. As the paper, coated cardboard or card paper having a basis weight in the range of 270 g / m ² to 350 g / m ² can be used. Moreover, as a laminated body containing paper, the paper which coated polyethylene, for example can be used.

  Next, as the pouch 2, any pouch can be used as long as it has the steam vent 2 a. For example, a three-side seal bag, a four-side seal bag, a standing pouch, a gusset bag, and the like. Further, the structure of the vapor vent 2a may be arbitrary. FIGS. 7A to 7D show examples of the structure of the vapor vent 2a.

  That is, the pouch of FIG. 7 (a) is a four-sided seal bag, which is provided with a closed curved seal line at a part thereof, and a through hole is formed in the inner region of the closed curved seal line to form a steam vent 2a1. is there. When this pouch is heated in a microwave oven, the closed curved seal line is peeled off as the pouch expands, and the through hole in the inner region is connected to the inside of the pouch. And a vapor | steam can be discharge | released outside a pouch from this through-hole.

  Further, the pouch in FIG. 7B is a standing pouch, in which the seal wire 21a around the pouch is bent inward of the pouch to form a vapor vent 2a2, and the bent portion is sealed by expansion caused by heating in the microwave oven. The line is peeled off, and steam can be released from the side of the pouch to the outside of the pouch.

  The pouch in FIG. 7 (c) is a three-sided seal bag, and the seal wire around the pouch is bent inward, and a through hole 21b is provided at the bent portion to form a steam vent 2a3. Due to the expansion, the seal line at the bent portion is peeled off, and the vapor can be discharged from the through hole to the outside of the pouch.

  Further, the pouch in FIG. 7 (d) is a gusset bag, and a plurality of through holes 2b are provided in the pouch, and a tape 5 covering the through holes is bonded to form a vapor vent 2a4. The tape 5 is peeled off due to the expansion, and the through hole 2b is exposed to the outside of the pouch, and vapor can be discharged from the through hole to the outside of the pouch.

  The pouch 2 may be made of any material as long as it has a barrier property that does not transmit steam and oxygen and has heat resistance that can withstand microwave heating. For example, a laminated body having a layer structure of polyester / polyamide / polypropylene deposited with an inorganic oxide in order from the outer layer can be used. Laminate having a layer structure of polyamide / maleic anhydride modified polyethylene / polyamide / polyethylene / vinyl acetate copolymer saponified product / maleic anhydride modified polyethylene / polyethylene or polyethylene / polyethylene terephthalate / aluminum foil / polyethylene / polyamide / polyethylene. It is also possible to use the body. Further, a laminate having a layer configuration of polypropylene / aluminum foil / polyethylene / polyamide / polyethylene or a laminate having a layer configuration of polyethylene terephthalate / aluminum foil / polyethylene may be used.

(Example)
In this example, an exterior box 1 having a pillow portion 17 is used. That is, the blank has the shape shown in FIG. 6, and the assembled outer box 1 has the shape shown in the explanatory perspective view of FIG. 5A and the explanatory sectional view of FIG. . As the pouch 2, a standing pouch shown in FIG. 7B was used.

The material of the exterior box 1 was coated cardboard having a basis weight of 300 g / mm ² , and an adhesive was applied to the inner surface side of the outer side plates 15b and 16b and the inner surface side of the adhesive piece 13x. Moreover, although the adhesive agent was applied also to the insertion board 173, this adhesive agent is for temporarily bonding the insertion board 173 to the upper surface board 11 before the assembly of a pillow part. The see-through window was formed by providing a through hole in this paper and covering the through hole with a transparent polyester film. As can be seen from FIGS. 5A, 5 </ b> B, and 6, the see-through window was disposed in the region 111 outside the opening tab 112.

  In addition, the pouch 2 is a laminate in which an outer layer is sequentially laminated with a polyester film (thickness 12 μm) on which an inorganic oxide is vacuum-deposited, printing ink, polyamide (thickness 15 μm), and unstretched polypropylene (thickness 60 μm). The internal volume is 300 ml.

  And after filling this pouch 1 with 200 ml of water and sealing it so that air does not enter, the steam vent 2a of the pouch 1 faces the see-through window, and the steam vent 2a from the outer surface of the exterior box 1 passes through the see-through window. The pouch 1 was accommodated in an exterior box so that the positional relationship can be seen through. Next, this package was handed over to 10 men and women, heated in a microwave oven, and then it was determined whether or not there was a person who spilled the contents. Note that the microwave heating conditions are 500 W and 3 minutes. Then, among 20 people in total, it was evaluated as “X” when one person spilled, and “◯” when no one spilled.

  In addition, it was similarly determined whether or not 200 ml of curry was filled in a pouch instead of water and spilled. These results are shown in Table 1 together with comparative examples described later.

(Comparative example)
The determination was made in the same manner as in the example except that a transparent window was not provided in the outer box.

1: Outer box 11: Top plate 111: Area outside opening tab 112: Opening tab 113: Through hole 11a: Opening weak line 11b: Opening 12: Side plate 12x: Adhesive piece 12y: Adhesive piece 13: Bottom Face plate 13x: Adhesive piece 13a: Insertion cut 14: Side plate 14x: Adhesive piece 14y: Adhesive piece 15: Side plate 15a: Inner side plate 15b: Outer side plate 16: Side plate 16a: Inner side plate 16b: Outer side Face plate 17: Pillow portion 171: Folding plate 172: Support plate 173: Insertion plate 1n: Boundary between top plate and side plate 2: Pouch 2a: Vapor vent 2a1-2a4: Vapor vent 21a: Seal wire 21b: Through Hole 2b: Through hole 3: Contents 4: Transparent film 5: Tape

Claims (6)

A package comprising a pouch containing the contents and an outer box containing the pouch, and heated and cooked in a microwave oven while the pouch is stored in the outer box,
Wherein an opening line of weakness is provided on the top plate of the outer box, a region surrounded by the opening line of weakness and the line connecting the both ends as the opening tab, steam discharge portion is constituted by the opening tab And
The pouch has a steam vent for discharging steam generated by microwave heating, and the exterior box has a see-through window in a region outside the opening tab, through which the steam vent can be seen from the outer surface. Characteristic packaging for heating microwave oven.   The package for heating a microwave oven according to claim 1, wherein the see-through window is composed of a through-hole provided in the exterior box and a transparent film adhered to cover the through-hole.   The said transparent film has heat resistance, The package for microwave oven heating of Claim 2 characterized by the above-mentioned.   The package for heating a microwave oven according to any one of claims 1 to 3, wherein the outer box has a steam discharge portion that is opened by expansion of a pouch or pressure of steam accompanying microwave heating.   The package for heating a microwave oven according to any one of claims 1 to 4, wherein the outer box has a pillow portion that is positioned under a steam vent of a pouch and tilts the package.   The package for heating a microwave oven according to any one of claims 1 to 5, wherein the outer box is made of paper or a laminate including paper.

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