JP2005350066A - Packaging bag for heating in microwave oven - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag for heating in a microwave oven in which a liquid and a solid containing much water are divided into two chambers and packaged, a packaged body is heated in the microwave oven, the content divided into two chambers and packaged can be cooked in a mixed manner, and steam generated during the cooking can be automatically exhausted outside. <P>SOLUTION: A laminate film with an easily peelable heat-bond resin layer laminated on an inner side thereof is folded, a side end heat-bond part is formed on an edge facing a fold, an end edge heat-bond part is formed on both edges orthogonal to the fold, and a bulkhead heat-bond part is formed parallel to the fold between the fold and the side end heat-bond part to form a rectangular bag demarcated into two chambers A and B. The width of the heat-bond part satisfies the inequalities : width of bulkhead heat-bond part ≤ width of side end heat-bond part < width of end edge heat-bond part. The length between inner ends of both end edge heat-bond parts is larger than the length between inner ends of the fold and the side end heat-bond part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, when heated in a microwave oven, the partition heat-bonding part is peeled off by the pressure of steam generated inside, and the liquid and solid matter containing a large amount of water are separated and packaged in two chambers at the partition heat-bonding part. Mixing and cooking water-rich liquid and solids that can be mixed and peel off the side thermal bond part by the pressure of steam generated when heating is continued and steam can be automatically discharged to the outside The present invention relates to a packaging bag for heating a microwave oven.

Conventionally, as a bag capable of mixing contents stored in two chambers by heating contents stored in two chambers with a microwave oven, a heat-resistant, pressure-resistant film or The sheet is folded and the remaining three sides are fused to form a bag body. A part of the bag body is further fused to form a small bag, and the first valve body is placed between the bag body and the outside. In addition to the formation, a second valve body is formed between the small bag and the bag body, and the pressure resistance of the first valve body is set higher than the pressure resistance of the second valve body (for example, Patent Literature 1) is known. However, in the above microwave oven packaging bag, the first valve body must be formed between the bag body and the outside, and the second valve body must be formed between the small bag and the bag body. The pressure resistance of the first valve body needs to be higher than the pressure resistance of the second valve body. The valve body is formed by printing the coating agent and fusing the seal portion at the same time. However, the process of forming the first valve body and the second valve body so that the pressure resistance of the first valve body is higher than the pressure resistance of the second valve body is extremely complicated, and a microwave packaging bag is produced. The manufacturing process is very difficult.
JP 11-11545 A

  An object of the present invention is to heat a liquid containing a lot of water by heating a packaging body in which a liquid containing a lot of water and a solid are divided and packaged without opening the packaging bag. By separating the heat-bonding part of the partition wall by the generated steam pressure, it can be cooked by mixing the liquid material containing a lot of water and the solid material, and the side end heat is generated by the generated steam pressure. It is an object of the present invention to provide a packaging bag for heating a microwave oven capable of peeling the adhesive portion and automatically discharging the steam inside the packaging bag to the outside.

  A laminated film with an easily peelable heat-adhesive resin layer laminated on the inner surface is folded to form side edge heat-bonding portions on the edges facing the folds, and edge heat-bonding portions on both edges in the direction perpendicular to the folds Forming a partition wall heat-bonding portion in a direction parallel to the crease between the crease and the side edge heat-bonding portion, and a rectangular bag partitioned into A and B2 chambers, the width of the heat-bonding portion The configuration is such that the partition wall heat-bonding portion ≦ the side edge heat-bonding portion <the edge heat-bonding portion, and the length between the inner ends of both ends of the heat-bonding portion is longer than the length between the crease and the inner end of the side-end heat bonding portion. The microwave heating in which the liquid containing a lot of water is stored in the A chamber between the partition thermal bonding portion and the fold, and the solid material is stored in the B chamber between the partition thermal bonding portion and the side edge thermal bonding portion. Packaging bag.

  The partition heat-bonding portion has a belt-like shape that protrudes toward the fold at the center in the longitudinal direction.

  The side end thermal bonding portion has a configuration in which a center portion in the longitudinal direction is a narrow thermal bonding portion.

  The side end heat bonding portion is configured to have a belt shape protruding inward at a central portion in the longitudinal direction.

  A configuration in which the side end thermal bonding portion has a shape having a protruding thermal bonding portion protruding inward in a central portion in the longitudinal direction, and a cut is formed through at least one laminated film in the central portion of the protruding thermal bonding portion. It is.

  The thermal adhesive strength of the partition thermal adhesive part, the side edge thermal adhesive part, and the edge thermal adhesive part is 10 to 30 N / 15 mm wide.

  The easy-peeling heat-adhesive resin layer is made of a co-extruded film having a heat-adhesive layer made of a polypropylene polymer, and the peeling behavior when peeling the heat-bonding part is peeled off due to internal cohesive failure of the heat-bonding layer. It is a configuration that proceeds.

  In the case of the packaging bag for heating a microwave oven according to the present invention, the width of the thermal bonding portion is set as partition thermal bonding portion ≦ side edge thermal bonding portion <edge thermal bonding portion, and the length between the inner ends of both ends thermal bonding portion is folded. Since it is longer than the length between the eye and the inner edge of the side edge thermal bonding part, a liquid containing a lot of water is stored in the partitioned A chamber, a solid substance is stored in the B chamber, and it is heated in a microwave oven. The chamber A swells due to the pressure of the vapor generated from the contained liquid, and the largest peeling stress is applied to the central portion in the longitudinal direction of the partition thermal bonding portion facing the fold, so that the partition thermal bonding portion is peeled off from the longitudinal central portion Therefore, the contents packed in two chambers can be mixed, and the length of the crease and the inner end of the side edge heat-bonded part is made longer by the pressure of steam generated when heating is continued. Because the greatest peeling stress is applied to the center of the side edge thermal bonding part, the side edge thermal bonding part Peeling to the interior of the vapor of the packaging bag can be automatically discharged to the outside.

  In the invention according to claim 2, when the liquid containing a lot of water is stored in the partitioned A chamber, the solid matter is stored in the B chamber and heated in the microwave, the pressure of the vapor generated in the A chamber is thermally bonded to the partition wall. Since it is most strongly applied to the part protruding to the crease side of the part, the partition thermal adhesive part is easily peeled off from the central part in the longitudinal direction to connect the A chamber and the B chamber, and the liquid containing a lot of water and the solid matter are mixed. Can be made.

  In the invention concerning Claims 3-5, the pressure of the internal vapor | steam is the strongest by heating after the partition heat-bonding part peels and the content which is divided and packaged in two chambers is mixed. It can peel from the location of the center part of the longitudinal direction of this side end heat bonding part, and can discharge | emit internal vapor | steam automatically outside.

  In the invention concerning Claim 6, it can prevent that a partition thermal-adhesion part peels during a transport and handling in the state which divided and stored the liquid and solid which contain much water in a packaging bag.

  In the invention according to claim 7, since the heat resistance of the easily peelable heat-adhesive resin layer is excellent, it is resistant to heating in a microwave oven, and the heat-adhesive layer is peeled off due to internal cohesive failure. By the pressure, the isolation heat bonding part and the side edge heat bonding part can be gradually peeled outward from the inner end of the heat bonding part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line II in FIG. 1, FIG. 3 is a plan view showing a second embodiment of the present invention, and FIG. FIG. 5 is a plan view showing a third embodiment of the present invention, FIG. 6 is a sectional view taken along line III-III in FIG. 5, and FIG. 7 is a plan view showing a fourth embodiment of the present invention. 2 is a crease, 3, 3 ', 3 ", 3"' are side edge heat-bonded portions, 4, 4 'are partition wall heat-bonded portions, 5 is edge heat-bonded portions, 6 is a notch, and 7 is narrow. Thermal bonding part, 8 is a protruding thermal bonding part, and 9 is a cut.

  1st Embodiment of the packaging bag for microwave oven heating of this invention is as showing in FIG. 1, FIG. As shown in FIG. 1, the planar shape is formed by folding a quadrangular laminated film 10 whose inner surface is an easily peelable heat-adhesive resin layer, and the side edge heat-bonding portion 3 on the edge facing the fold 2. The edge thermal bonding portion 5 is formed at both end edges in the direction orthogonal to the fold, and the partition thermal bonding portion is parallel to the fold 2 in a substantially central portion between the fold 2 and the side edge thermal bonding portion 3. 4 is formed to divide the packaging bag into A and B2 chambers, and a notch 6 is formed at the outer end of the opposite edge thermal bonding portion 5 so that the width of the thermal bonding portion is equal to the partition thermal bonding portion 4 ≦ side edge heat. Adhesive part 3 <edge thermal adhesive part 5 and the length between the inner ends of both end thermal adhesive parts 5 is longer than the length between the crease 2 and the inner end of side thermal adhesive part 3, The chamber A surrounded by the bonding part 4, the crease 2 and the both-end edge thermal bonding part 5 contains a liquid containing a lot of water, and the partition wall thermal bonding part 4, the side edge thermal bonding part 3, and the both-end edge thermal bonding part 5 The B room surrounded by Is a packaging bag was to be paid.

  As shown in FIG. 2, the sectional view in the direction orthogonal to the partition wall thermal adhesive portion 4 of the first embodiment is such that the laminated film 10 whose inner surface is an easily peelable thermal adhesive resin layer is folded at the crease 2. The easy-peelable heat-adhesive resin layer of the laminated film 10 is heat-bonded at the partition heat-bonding part 4 and the side-end heat-bonding part 3, A liquid containing a lot of water is stored in the enclosed A chamber, and a solid material is stored in the B chamber surrounded by the side end thermal bonding portion 3, the partition thermal bonding portion 4, and both end edge thermal bonding portions 5.

  The second embodiment of the present invention is as shown in FIGS. As shown in FIG. 3, the planar shape is such that the side edge thermal bonding portion 3 ′ is wider than the partition thermal bonding portion 4, and the side edge thermal bonding portion 3 ′ is a narrow width thermal bonding portion 7 at the center in the longitudinal direction. The configuration is basically the same as that of the first embodiment except that the configuration is different. In the case of the second embodiment, the steam is easily peeled off from the portion of the narrow thermal bonding portion 7 of the side end thermal bonding portion 3 ′ by the pressure of the internal vapor, so that the vapor can be easily discharged to the outside.

  A third embodiment of the present invention is as shown in FIGS. As shown in FIG. 5, the planar shape is such that the side end thermal bonding portion 3 "has a width wider than the partition thermal bonding portion 4, and the side end thermal bonding portion 3" protrudes inwardly at the center in the longitudinal direction. The configuration is basically the same as that of the first embodiment except that the thermal bonding portion 8 is formed and the cut 9 is formed inside the protruding thermal bonding portion 8. In the case of the third embodiment, peeling starts from the inner end side of the protruding thermal bonding portion 8 of the side end thermal bonding portion 3 ″ due to the pressure of the internal steam, and when peeling reaches the cut 9, Steam can be discharged to the outside.

  As shown in FIG. 7, the planar shape of the fourth embodiment of the present invention is a strip shape in which a narrow partition heat-bonding portion 4 ′ protrudes toward the crease 2 at the central portion in the longitudinal direction. The side end thermal bonding portion 3 "'is basically the same as the first embodiment except that the side end thermal bonding portion 3"' has a belt-like configuration protruding inward in the central portion in the longitudinal direction. In the case of the fourth embodiment, the protruding portions of the partition wall heat-bonding portion 4 ′ and the side end heat-bonding portion 3 ″ ′ are easily peeled off by the pressure of the internal vapor.

  In the first to fourth embodiments, the length between the inner edges 5 of both ends of the thermal bonding portion is 1.3 times or more the length between the folds and the fold side edge of the partition thermal bonding portion. Yes. By doing so, the A chamber has a rectangular shape with the partition thermal bonding portion as the long side and the both-ends thermal bonding portion 5 as the short side, and therefore, the A chamber is filled with a water-rich liquid and heated in a microwave oven. In this case, the peeling stress due to the pressure of the vapor generated inside becomes the largest in the central portion in the longitudinal direction of the partition wall heat-bonding portion, and the partition heat-bonding portion can be peeled off from the central portion in the longitudinal direction of the partition wall heat-bonding portion. It can also be a rectangular shape with the side edge heat-bonding portion as the long side and the both-end edge heat-bonding portion as the short side even after the partition wall heat-bonding portion is peeled off and the A chamber and B chamber are integrated. Peeling stress due to the pressure of steam generated inside is greatest at the center in the longitudinal direction of the side end thermal bonding portion, and the side end thermal bonding portion can be peeled off from the center in the longitudinal direction of the side end thermal bonding portion. it can.

  For example, as a packaging body in which water is stored in the A chamber of the microwave heating packaging bag of the first embodiment and dried vegetables are stored in the B chamber, the packaging body is heated in a microwave oven and stored in the A chamber. When the water being vaporized and the A chamber swells and the water vapor pressure in the A chamber increases, the length of the partition thermal bonding portion 4 becomes 1.3 times or more the length between the crease 2 and the partition thermal bonding portion 4. Therefore, the peeling stress due to water vapor applied to the inner end of the partition wall heat bonding portion 4 is maximized at the longitudinal center portion of the partition wall heat bonding portion 4 which is the long side, and the partition wall heat bonding portion 4 has a center portion in the longitudinal direction. In the state where the partition wall thermal bonding part 4 is peeled off and the A room and the B room are communicated, the water stored in the A room and the dried vegetables stored in the B room are mixed, and the water and the dried vegetables are mixed. Because it is cooked, dried vegetables can be returned with water.

  By further heating from the state in which the partition wall thermal bonding portion 4 is peeled and the water stored in the A chamber and the dried vegetables stored in the B chamber are mixed, the partition thermal bonding portion 4 is separated and the A chamber and the B chamber are separated. Since the length between the inner ends of the thermal bonding portions 5 at both ends is longer than the length between the crease 2 and the inner ends of the side thermal bonding portions 3 in a state where the chambers are in communication, the length of the side thermal bonding portion 3 that is the long side is longer. Since the peeling stress due to the pressure of the steam becomes the largest in the central part in the direction, the side end heat bonding part 3 peels off in the central part in the longitudinal direction, and the internal steam can be discharged to the outside of the packaging bag. By heating in a microwave oven with water stored in the A chamber of the bag and dried vegetables in the B chamber, the packaging bag does not rupture and the contents stored in the interior do not overflow. The dried vegetables can be reconstituted with water. After returning the dried vegetables with water, the contents can be taken out by tearing the packaging bag from the notch 6.

  In the case of the second embodiment, after the packaging bag containing the contents is heated in a microwave oven, the partition heat bonding part 4 is peeled off by the steam generated inside, and the chamber A and the chamber B communicate with each other. Since the central portion in the longitudinal direction of the side end thermal bonding portion 3 ′ where the peeling stress due to the pressure of this is the strongest is the narrow thermal bonding portion 7, the thermal bonding portion gradually starts from the inner end of the narrow thermal bonding portion 7. Since it peels and penetrates the narrow thermal bonding part 7, the vapor | steam in a packaging bag can be easily discharged | emitted outside. In the case of the third embodiment, after the packaging bag containing the contents is heated and the chamber A and the chamber B are communicated with each other, the peeling stress due to the pressure of the internal steam is formed in the side end heat bonding portion 3. Since it becomes the largest at the inner end of the thermal bonding portion 8, the protruding thermal bonding portion 8 is peeled off from the inner end, and the vapor in the packaging bag is discharged to the outside from the cut 9 formed in the protruding thermal bonding portion 8. be able to. In the case of the fourth embodiment, by heating the packaging bag containing the contents, the protruding portion of the partition wall heat-bonding portion 4 ′ is easily peeled off by the pressure of the internal steam, and the side end heat-bonding portion 3 ″ ′ Since the protruding portion of the wall is easy to peel off, the partition thermal bonding portion 4 'is peeled off to allow communication between the chamber A and the chamber B, and then the side edge thermal bonding portion 3 "is peeled off to release the vapor in the packaging bag to the outside. It becomes easy to discharge.

  The contents to be stored in the microwave oven packaging bag of the embodiment is not particularly limited, but those that can be eaten delicious if they are stored separately before cooking and mixed immediately before eating are preferable, for example, Water can be stored in room A, dried vegetables in room B, sauce in room A, hamburger in room B, sauce in room A, and fish etc. in room B.

  In the first to fourth embodiments, the easily peelable heat-adhesive resin layer laminated on the inner surface of the laminated film 10 can be sealed by heat bonding, and the heat-bonded portion is easily peeled off by steam generated during microwave heating. This is a possible thermoadhesive resin, for example, made of a co-extruded film with a thermoadhesive layer made of a polypropylene polymer. It is a progression. As such an easily peelable heat-adhesive resin layer, for example, as described in JP-A-2001-277448, a composite film comprising at least a layer A serving as a heat-bonding layer and a layer B serving as a laminate layer The layer A is a blend of 10 to 25% by weight of low density polyethylene and 5 to 15% by weight of at least one selected from ethylene-propylene rubber and ethylene-propylene-butene-1 rubber in a propylene copolymer. In addition, the total of the low-density polyethylene and the rubber is 60% by weight or less, and the layer B is a propylene-based copolymer, or ethylene as described in JP-A-2004-42450 Laminate layer made of a polymer, propylene polymer 20 to 70% by weight, ethylene polymer 20 to 60% by weight, ethylene / α, β-saturation A coextruded film provided with a heat bonding layer made of a polyolefin composition comprising 5 to 40% by weight of a carboxylic acid copolymer can be used. In the above-mentioned coextruded film, the ratio of the thickness of the thermal adhesive layer / laminate layer is preferably 1/3 to 1/10, and if the ratio of the thermal adhesive layer is too large, deterioration of transparency and stringing are likely to occur. If it is too small, the thermal bond strength may become too strong. Specific examples of the easily peelable thermoadhesive resin layer include CMPS013C (Tocello Corporation), Trefan CF9501H (Toray Synthesis Co., Ltd.) and the like.

  As the adhesive strength when the laminated film 10 is heat-bonded between the easily peelable heat-adhesive resin layers, the width is preferably 10 to 30 N / 15 mm, and in that case, the peel strength in a 100 ° C. environment is 0.5. ~ 8N / 15mm width. By using the above-mentioned thermal adhesive strength, the contents stored in the A chamber and the B chamber partitioned by the easily peelable heat-bonding portion are easily peeled off during transportation, handling and storage of the package. Vapor generated from a liquid containing a large amount of water stored in the A chamber when the package body that is partitioned into the A and B chambers and contains the contents is heated in a microwave oven without being peeled off It is possible to reliably separate the heat-adhering part by separating the heat-bonded portion by the pressure of the container and to mix the contents stored in the A and B chambers, and to heat the side end after mixing and heating the contents. The adhesive part is peeled off, and the vapor in the packaging bag can be automatically discharged to the outside.

  The laminated film 10 has a structure composed of a base material layer and an easily peelable thermoadhesive resin layer (EP), and a structure composed of a base material layer, an intermediate layer and an easily peelable thermoadhesive resin layer (EP). Is done. As the base material layer, biaxially stretched polyethylene terephthalate (PET), metal oxide vapor-deposited biaxially stretched polyethylene terephthalate (VMPET), biaxially stretched nylon (ON), etc. are used. As the intermediate layer, VMPET, ethylene-vinyl is used. An alcohol copolymer (EVOH) or the like is used. As a structure of a laminated | multilayer film, they are PET / EP, ON / EP, VMPET / EP, PET / VMPET / EP, ON / VMPET / EP etc., for example.

The top view which shows 1st Embodiment of this invention. The II sectional view taken on the line in FIG. The top view which shows 2nd Embodiment of this invention. II-II sectional view taken on the line in FIG. The top view which shows 3rd Embodiment of this invention. III-III sectional view taken on the line in FIG. The top view which shows 4th Embodiment of this invention.

Explanation of symbols

2 Folds 3, 3 ', 3 ", 3"' Thermal bonding part 4, 4 'Bulkhead thermal bonding part 5 Edge thermal bonding part 6 Notch 7 Narrow thermal bonding part 8 Protruding thermal bonding part 9 Cut
10 Laminated film

Claims (7)

A laminated film with an easily peelable heat-adhesive resin layer laminated on the inner surface is folded to form side edge heat-bonding portions on the edges facing the folds, and edge heat-bonding portions on both edges in the direction perpendicular to the folds Forming a partition wall heat-bonding portion in a direction parallel to the crease between the crease and the side edge heat-bonding portion, and a rectangular bag partitioned into A and B2 chambers, the width of the heat-bonding portion The configuration is such that the partition wall heat-bonding portion ≦ the side edge heat-bonding portion <the edge heat-bonding portion, and the length between the inner ends of both ends of the heat-bonding portion is longer than the length between the crease and the inner end of the side-end heat bonding portion. The room A between the partition thermal bonding part and the crease stores liquid containing a lot of water, and the room B between the partition thermal bonding part and the side edge thermal bonding part stores solid matter. A packaging bag for heating a microwave oven. The packaging bag for heating a microwave oven according to claim 1, wherein the heat-bonding portion of the partition wall is formed in a band shape protruding toward the fold at the center portion in the longitudinal direction. The packaging bag for heating a microwave oven according to claim 1 or 2, wherein the side end thermal bonding portion has a central portion in the longitudinal direction as a narrow thermal bonding portion. The packaging bag for heating a microwave oven according to claim 1 or 2, wherein the side end thermal bonding portion is formed in a band shape protruding inward at a central portion in a longitudinal direction. The side end thermal bonding portion has a shape having a protruding thermal bonding portion that protrudes inward in a central portion in the longitudinal direction, and a cut is formed through the at least one laminated film inside the protruding thermal bonding portion. A packaging bag for heating a microwave oven according to claim 1 or 2. The thermal adhesive strength of the partition thermal adhesive part, the side edge thermal adhesive part, and the edge thermal adhesive part is 10 to 30 N / 15 mm wide. Packaging bag for microwave oven heating. The easy-peeling heat-adhesive resin layer is made of a co-extruded film having a heat-adhesive layer made of a polypropylene polymer, and the peeling behavior when peeling the heat-bonding part is peeled off due to internal cohesive failure of the heat-bonding layer. It progresses, The packaging bag for microwave oven heating in any one of Claims 1-6 characterized by the above-mentioned.