Frozen food bag products

Abstract

A bag (11) is formed in a gusset bag shape, and encapsulates therein a frozen food (20) by joining together portions along short sides of a pair of front and rear main-surface films (12a, 12b) as end joining portions (15). In the respective end joining portions (15), V-folded lateral-surface films (13a, 13b) are formed by joining ends of the lateral-surface films (13a, 13b) only to ends along the short sides of the main-surface films (12a, 12b) without joining a pair of V-shaped pieces to each other, so that lateral joining portions (15a) between ends of the lateral-surface films (13a, 13b) and ends along the short sides of the main-surface films (12a, 12b) can be widened in a V shape.

Description

[Technical field]

[0001] The present invention relates to a bagged product containing frozen food, and more particularly to a bagged product containing frozen food that allows the thawed or heated food to be eaten while still contained in the bag, without being transferred to another container. [Background technology]

[0002] With the widespread use of microwave ovens, frozen foods and heated and pressurized foods such as retort foods are commonly purchased by many consumers. Frozen foods are distributed in a state where the frozen foods are preferably contained in a bag such as an airtight and light-shielding pouch. Some of these airtight and light-shielding pouches contain metal foil such as aluminum as a packaging material, and in such cases, the bag cannot be used in a microwave oven as is. Therefore, when defrosting or heating the frozen foods contained in the bag in a microwave oven, the frozen foods are transferred to another container such as tableware before defrosting or heating.

[0003] Furthermore, in recent years, frozen foods stored in microwave-safe bags have also become common; such microwave-safe bags have been made possible by the development of special film materials that have excellent heat resistance and preservation properties, and are equipped with a steam venting mechanism that can remove steam generated by the stored frozen food (see, for example, Patent Document 1). Frozen foods stored in such microwave-safe bags are also designed to be thawed or heated, and then transferred to other containers such as tableware before being eaten. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] US2003031763A1 Summary of the Invention

[0005] On the other hand, due to the recent increase in the desire to save money, the diversification of eating styles, and the desire for convenience and time saving, it is expected that people, especially young people, will desire to be able to easily eat frozen foods in the bag without having to transfer them to other containers such as tableware after thawing or heating them in a microwave oven.Therefore, there is a demand for new bag products that will enable such easy eating.

[0006] To provide a bag product containing frozen food, which enables frozen food contained in the bag to be easily eaten in the state contained in the bag without being transferred to another container such as tableware after being thawed or heated in a microwave oven, and a method for using the bag product containing frozen food.

[0007] The present invention relates to a bag product containing frozen food, which allows a frozen food contained in a bag to be thawed or heated using a microwave oven, and allows the thawed or heated food to be eaten while still contained in the bag without being transferred to another container, the bag being formed using a film material so as to have a pair of front and rear front film parts having a rectangular front shape, and side film parts folded into a V shape and sandwiched along at least one of the long sides on both sides of these front film parts, and the parts along the short sides on both sides of the pair of front and rear front film parts are each joined as a joint, thereby sealing in the frozen food inside, and one of the pair of front and rear front film parts is formed with a steam exhaust part, and at each of the joints along the short sides on both sides of the pair of front and rear front film parts, the side film parts folded into a V shape are not joined to each other, and the ends of the side film parts are joined together along at least one of the short sides on both sides of the pair of front and rear front film parts. The above-mentioned objective has been achieved by providing a bag product containing frozen food in which the pair of front film parts are joined only to the ends along the short sides of both sides, so that the joints between the ends of both sides of the side film parts and the ends along the short sides of both sides of the front film part are formed to expand in a V shape, and a bag containing thawed or heated food removed from a microwave oven is provided with the side film part on one long side of the front film part positioned downward, and the V-shaped folded state of the side film part positioned below is opened due to the weight of the thawed or heated food, and the bag is placed on a placing surface due to the weight of the thawed or heated food, with the side film part positioned below in an opened folded state serving as a placing part, and the portion on the other long side of the front film part is cut away along the long side direction to form an opening for removal, and the food can be removed and eaten through the opening.

[0008] The frozen food-containing bag product of the present invention is preferably formed in a gusseted bag shape using a film material so that the bag has a pair of front and rear front film portions having a rectangular front shape, and a pair of left and right side film portions folded into a V shape and sandwiched between the portions along the long sides of both sides of these front film portions, and the portions along the short sides of both sides of the pair of front and rear front film portions are each joined as a joint, thereby sealing the frozen food inside, and a steam exhaust portion is formed in one of the pair of front and rear front film portions, and at each of the joints along the short sides of both sides of the pair of front and rear front film portions, the pair of left and right side film portions folded into a V shape are not joined to each other, but the ends of the side film portions are each joined only to the ends along the short sides of both sides of the pair of front and rear front film portions, so that the joints between the ends on both sides of the side film portions and the ends along the short sides of both sides of the front film portions are formed to expand in a V shape.

[0009] In addition, in the frozen food bag product of the present invention, it is preferable that the film material forming the bag is a laminated film material consisting of a stretched synthetic resin film and an unstretched synthetic resin film having heat sealability that is laminated to the inside of the stretched synthetic resin film.

[0010] In addition, it is preferable that the frozen food bag product of the present invention is configured such that the steam exhaust section is interposed between the stretched synthetic resin film and the unstretched synthetic resin film, and includes a low-melting point heat-sealing agent or release agent applied in a strip-like shape to the stretched synthetic resin film, and a cutting line engraved in a linear shape into the stretched synthetic resin film, running longitudinally in the extension direction across the strip-like portion to which the low-melting point heat-sealing agent or release agent is applied, from the strip-like portion to an area to which the low-melting point heat-sealing agent or release agent is not applied.

[0011] Furthermore, in the frozen food bag product of the present invention, it is preferable that the steam exhaust section extends in a direction along the long side of one of the front film sections and is biased toward the other long side opposite the side film section on the one long side which serves as the placement section.

[0012] In addition, it is preferable that the cutting line of the steam exhaust portion of the frozen food bag product of the present invention functions as a cutting guide line when the food contained in the bag is thawed or heated and then the front film portion is cut along the long side direction to form an access opening.

[0013] Furthermore, in the bagged frozen food product of the present invention, it is preferable that the frozen food contained in the bag is frozen cooked rice.

[0014] The present invention also achieves the above-mentioned object by providing a method of using the above-mentioned bag product containing frozen food, in which the bag product in which the frozen food is contained is placed in a microwave oven with the one of the front film parts on which the steam exhaust section of the bag is formed facing upwards, the microwave oven is operated for a predetermined time sufficient to thaw or heat the contained frozen food, thereby thawing or heating the frozen food while exhausting steam from the steam exhaust section, and then the bag product is removed from the microwave oven and the thawed or heated food is shifted to one side toward the side film part on one of the long sides of the bag, so that the weight of the thawed or heated food causes the side film part on one of the long sides to open in a V-folded state, thereby forming a placement section by the side film part on one of the long sides, and with the placement section formed placed on a receiving surface due to the weight of the thawed or heated food, the portion of the front film part on the other long side is cut away along the long side direction to form an access opening, and the food can be taken out and eaten through the formed access opening. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic perspective view of a bagged product containing frozen food according to a preferred embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic front view of FIG. 1 as seen from a direction A. FIG. [Diagram 3] FIG. 3 is a schematic perspective view of the bag before the frozen food is placed inside. [Figure 4] 4(a) to (c) and (e) are cross-sectional views taken along line BB in FIG. 1 for explaining the function of the steam exhaust portion, and FIGS. 4(d) and (f) are schematic perspective views of the steam exhaust portion. [Diagram 5] FIG. 5 is a schematic perspective view illustrating a method of using the bagged product containing frozen food according to a preferred embodiment of the present invention. [Figure 6] FIG. 6 is a schematic perspective view illustrating a method of using the bagged product containing frozen food according to a preferred embodiment of the present invention. [Figure 7] FIG. 7 is a schematic perspective view illustrating a method of using the bagged product containing frozen food according to a preferred embodiment of the present invention. [Figure 8] FIG. 8 is a schematic perspective view illustrating a method of using the bagged product containing frozen food according to a preferred embodiment of the present invention. [Figure 9] FIG. 9 is a schematic perspective view illustrating a method of using the bagged product containing frozen food according to a preferred embodiment of the present invention. [Figure 10] FIG. 10(a) is a schematic perspective view of a bagged product containing frozen food according to another preferred embodiment of the present invention, and FIG. 10(b) is a schematic front view of FIG. 10(a) as viewed from direction C. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] A bag product 10 containing frozen food according to a preferred embodiment of the present invention shown in Figures 1 and 2 is manufactured as a bag product for individual meals, containing frozen food 20 (see Figure 9) that has been cooked and frozen, preferably frozen rice such as mixed fried rice, kimchi fried rice, pilaf, chicken rice, etc., in a bag 11 (see Figure 3) formed using a synthetic resin film material 14 and having a rectangular planar shape. The bag product 10 containing frozen food according to this embodiment does not contain metal foil such as aluminum, and has a steam exhaust section 17, so that the frozen food can be thawed or heated by placing it directly in a microwave oven 30 (see Figures 5 and 6), and also has a function of allowing the thawed or heated food 20 to be easily eaten while still contained in the bag 11 without being transferred to another container such as tableware (see Figure 9).

[0017] The frozen food-containing bag product 10 of this embodiment is a bag product in which the frozen food 20 contained in the bag 11 is thawed or heated using a microwave oven 30, and the thawed or heated food 20 can be eaten while still contained in the bag 11 without being transferred to another container. As shown in Figures 1 to 3, the bag 11 is preferably formed in a gusseted bag shape using a film material 14 so as to have a pair of front and rear front film parts 12a, 12b having a rectangular front shape, and a pair of left and right side film parts 13a, 13b folded in a V shape and sandwiched between at least one of the long sides of the front film parts 12a, 12b, preferably along the long sides, and the parts along the short sides of the pair of front and rear front film parts 12a, 12b are each joined as end joint parts 15, thereby sealing the frozen food 20 inside. A steam exhaust part 17 is formed in one 12a of the pair of front and rear front film parts 12a, 12b.

[0018] At each end joint 15 along the short sides on both sides of the pair of front and rear front film parts 12a, 12b, preferably a pair of left and right side film parts 13a, 13b are folded into a V shape, and each of the pair of V-shaped pieces is not joined to each other, but the ends of the side film parts 13a, 13b are each joined only to the ends along the short sides on both sides of the pair of front and rear front film parts 12a, 12b, so that the side joint points 15a between the ends on both sides of the side film parts 13a, 13b and the ends along the short sides on both sides of the front film parts 12a, 12b are formed to expand in a V shape.

[0019] As shown in Figures 5 to 9, bag 11 containing thawed or heated food 20 removed from microwave oven 30 is placed with side film portion 13a on one of the long sides of front film portions 12a, 12b positioned downward (see Figure 7), and the V-shaped fold of side film portion 13a positioned downward is opened due to the weight of the thawed or heated food. The opened folded side film portion 13a positioned downward serves as placing portion 21, and the bag is placed on placing surface 22 due to the weight of the thawed or heated food 20 (see Figure 8). The other long side portion of front film portions 12a, 12b is then cut away along the long side direction to form removal opening 23, and food 20 can be removed and eaten through the formed removal opening 23 (see Figure 9).

[0020] In this embodiment, the film material 14 forming the bag 11 is a laminated film material consisting of a stretched synthetic resin film 14a and an unstretched synthetic resin film 14b having heat sealability that is bonded to the inside of the stretched synthetic resin film 14a, as shown in Figures 4(a) to (c) and (e). As shown in Figures 1 and 4(a) to (f), the steam exhaust section 17 is interposed between the stretched synthetic resin film 14a and the unstretched synthetic resin film 14b, and is configured to include a low-melting point heat sealant 17a or a release agent 17b that is extended in a strip shape and applied to the stretched synthetic resin film 14a, and a cutting line 17d that is engraved in a linear shape on the stretched synthetic resin film 14a, longitudinally cutting the strip portion 17c to which the low-melting point heat sealant 17a or release agent 17b is applied, in the extension direction, from the strip portion 17c to an area where the low-melting point heat sealant 17a or release agent 17b is not applied.

[0021] Furthermore, in this embodiment, as shown in Figures 1 and 3, the steam exhaust section 17 extends in a direction along the long side direction of one of the front film sections 12a, and is positioned offset toward the other long side side opposite the side film section 13a on the one long side side that constitutes the mounting section 21.

[0022] In this embodiment, the bag 11 containing the frozen food 20 can be formed using a laminated film material, preferably made by bonding together a synthetic resin stretched film 14a and a synthetic resin unstretched film 14b having heat sealability, as the film material 14. The bag 11 can be formed using, for example, a single sheet of film material 14 in the shape of a horizontally elongated rectangular strip having a width similar to the length of the long sides of the front film parts 12a, 12b and a length approximately three times the length of the short sides of the front film parts 12a, 12b.

[0023] That is, to form a bag 11 using a single horizontally elongated rectangular film material 14, for example, a synthetic resin unstretched film 14b having heat-sealing properties is placed on the inside, the film material 14 is bent into a ring shape, and the edge portions at both ends in the horizontal direction are heat-sealed by overlapping the inner synthetic resin unstretched films 14b on each side to form a long side joint 16, thereby forming the film material 14 into a tubular shape. 3, the cylindrical film material 14 is placed, for example, in the center of the short side direction of one front film part 12a with the long side direction joint part 16 running vertically, and the pair of left and right side film parts 13a, 13b folded in a V shape are sandwiched between the other front film part 12b overlapping the one front film part 12a and the other front film part 12b along the long sides on both sides of these front film parts 12a, 12b, and from the flat folded state, an end part along one short side of the folded film material 14 is heat sealed as an end joint part 15. In this way, a bag 11, preferably in the form of a gusseted bag, can be formed before food 20 is placed inside.

[0024] Here, as the synthetic resin stretched film 14a constituting the film material 14 for forming the bag 11, for example, a general-purpose stretched film made of polyethylene terephthalate (PET), polypropylene (PP), polyamide (PA), etc. can be used. Examples of stretched films include uniaxially stretched films and biaxially stretched films. Uniaxially stretched films have the property of being difficult to stretch in one direction, either the vertical or horizontal direction. Biaxially stretched films are films that are difficult to stretch in both the vertical and horizontal directions, and have excellent mechanical suitability for printing processing, lamination composite processing, etc., so they can be preferably used as a substrate.

[0025] The synthetic resin unstretched film 14b constituting the film material 14 can be an unstretched film made of polyethylene (PE) or polypropylene (PP), which is widely used as a sealant for packaging laminates, as it is not only easy to stretch in both the vertical and horizontal directions and is resistant to impact, but also has stable heat sealability and heat seal strength.

[0026] In this embodiment, the bag 11 preferably formed in a gusseted bag shape has an inner layer of the film material 14 made of a synthetic resin unstretched film 14b having heat sealability, and an outer layer made of a synthetic resin stretched film 14a not having heat sealability, so that in one heat-sealed end joint 15, the ends of the side film parts 13a, 13b folded into a V shape are joined only at their inner surfaces to the inner surfaces of the ends along the short sides of the pair of front and rear front film parts 12a, 12b as V-shaped side joint parts 15a without joining the outer surfaces of the V-shaped pieces to each other. In addition, in the end joint part 15 along the short sides of the pair of front and rear front film parts 12a, 12b, the part between the side joint parts 15a on both sides is a middle joint part 15b where the inner surfaces of the ends along the short sides of the pair of front and rear front film parts 12a, 12b are joined to each other. As a result, the side joint points 15a between the ends of the side film portions 13a, 13b and the ends along the short sides of the front film portions 12a, 12b are formed so as to extend in a V-shape with the end of the middle joint point 15b as its apex, as shown in Figure 2.

[0027] An end portion along one of the short sides of the pair of front and rear front film portions 12a, 12b of the folded film material 14 is heat-sealed as end joint 15 to form a gusseted bag 11 before containing food 20, and then a predetermined amount of frozen food 20 is placed inside bag 11 using the end portion along the other short side that is not heat-sealed as a supply opening. Thereafter, an end portion along the other short side of bag 11 is heat-sealed as end joint 15 in the same manner as the end portion along one short side, thereby forming bag product 10 containing frozen food of this embodiment as shown in FIG.

[0028] In the other heat-sealed end joint 15, similarly to the one end joint 15, the ends of the side film parts 13a, 13b folded into a V shape are joined only to the inner surfaces of the ends along the short sides of the pair of front and rear front film parts 12a, 12b as V-shaped side joint parts 15a without joining the outer surfaces of the V-shaped pieces to each other. In addition, the part between the side joint parts 15a on both sides in the end joint parts 15 along the short sides of the pair of front and rear front film parts 12a, 12b is an intermediate joint part 15b where the inner surfaces of the ends along the short sides of the pair of front and rear front film parts 12a, 12b are joined to each other. As a result, the side joint parts 15a between the ends of the side film parts 13a, 13b and the ends along the short sides of the front film parts 12a, 12b are formed to spread in a V shape (V-shape) with the end of the intermediate joint part 15b as the apex, as shown in FIG. 2.

[0029] Furthermore, in this embodiment, a strip-shaped portion 17c is provided in advance by applying a low-melting heat seal agent 17a or a release agent 17b to the stretched synthetic resin film 14a, which is interposed between the stretched synthetic resin film 14a and the unstretched synthetic resin film 14b, at a predetermined position of one horizontally elongated rectangular film material 14, and a cutting line 17d is engraved linearly so as to run vertically through the strip-shaped portion 17c. As a result, when the bag 11 is formed into a gusseted bag shape, as shown in Fig. 3, the steam exhaust portion 17 extends in the direction along the long side of one front film portion 12a, and is formed to be biased toward the side film portion 13b on the other long side, opposite the side film portion 13a on the one long side that becomes the placement portion 21.

[0030] Here, the steam exhaust section 17 has a configuration similar to that of the exhaust section mechanism for exhausting steam described in Japanese Patent No. 4817583, and as shown in Figures 1 and 4(a) to (f), is configured to include a low-melting-point heat sealant 17a or a release agent 17b interposed between a stretched synthetic resin film 14a and an unstretched synthetic resin film 14b, extended in a strip shape and applied to the stretched synthetic resin film 14a, and a cutting line 17d engraved linearly only on the stretched synthetic resin film 14a, cutting the strip portion 17c to which the low-melting-point heat sealant 17a or release agent 17b is applied in the extension direction, from the strip portion 17c to the area to which the low-melting-point heat sealant 17a or release agent 17b is not applied. In this embodiment, the strip-shaped portion 17c formed by applying the low-melting heat sealant 17a or the release agent 17b has a required width of, for example, about 45 to 145 mm, and both ends are preferably in the shape of an inverted arrow. The cutting line 17d can be formed as a straight line or a broken line.

[0031] As described below, when the bag product 10, in which the frozen food 20 is sealed in the bag 11, is placed in a microwave oven 30 to thaw or heat the frozen food 20, the steam exhaust section 17 has a function of enabling the steam generated from the contained frozen food 20 to be exhausted while moderately steaming the contained frozen food 20. That is, when the bag product 10 is placed in the microwave oven 30 to thaw or heat the frozen food 20, the moisture contained in the contained frozen food 20 evaporates as steam, and this steam mixes with air to increase the pressure inside the bag 11. For this reason, the synthetic resin unstretched film 14b, which is the inner layer in the steam exhaust section 17, begins to stretch in a direction perpendicular to the cutting line 17d as shown in Figures 4(b) and (c), while pushing and spreading the synthetic resin stretched film 14a bonded to the outside.

[0032] As the pressure inside the bag 11 further increases, the cut portion of the stretched synthetic resin film 14a by the cutting line 17d expands, and the stretched area of ​​the unstretched synthetic resin film 14b expands accordingly. If a low-melting point heat seal agent 17a is applied to the stretched synthetic resin film 14a, the melting of the agent causes the stretched synthetic resin film 14a to peel off from the applied portion, or if a release agent 17b is applied to the stretched synthetic resin film 14a, the low frictional properties of the release agent cause the stretched synthetic resin film 14a and the unstretched synthetic resin film 14b to peel off from the applied portion, and the outer layer of the stretched synthetic resin film 14a begins to open through the cutting line 17d at the portion where the low-melting point heat seal agent 17a or release agent 17b is applied, as shown in Figures 4(c) and (d).

[0033] Even after the stretched synthetic resin film 14a starts to open at the cutting line 17d, the unstretched synthetic resin film 14b tries to stretch further as shown in Fig. 4(e), but only the area of ​​the belt-shaped portion 17c where the heat seal agent 17a or the release agent 17b is applied stretches, and the other areas where the heat seal agent 17a or the release agent 17b is not applied do not stretch, so that stress is concentrated at the boundary between the belt-shaped portion 17c where the low-melting heat seal agent 17a or the release agent 17b is applied and the unapplied area. As a result, small holes 18 are opened in the unstretched synthetic resin film 14b at both ends of the belt-shaped portion 17c where the stretched synthetic resin film 14a opens, preferably at the central corners of the inverted arrow shape where the cutting line 17d intersects, as shown in Fig. 4(f).

[0034] When the small hole 18 is opened in the unstretched synthetic resin film 14b, the water vapor inside the bag 11 passes through the opened small hole 18 and the opening of the cutting line 17d of the stretched synthetic resin film 14a, and is smoothly discharged to the outside of the bag 11. In addition, as the water vapor is discharged to the outside, the pressure inside the bag 11 decreases, and the elongation rate of the unstretched synthetic resin film 14b decreases, so the opened small hole 18 becomes smaller and is almost closed.

[0035] When small holes 18 are closed, the pressure inside bag 11 rises again, increasing the elongation rate of synthetic resin unstretched film 14b, reopening small holes 18. This allows the water vapor inside bag 11 to be discharged to the outside again, and the pressure inside bag 11 decreases. In this way, the opening area of ​​small holes 18 expands and contracts, causing the pressure inside bag 11 to repeatedly decrease and increase, and the pressure inside bag 11 is stably maintained within a certain range higher than normal pressure, thereby providing an appropriate steaming effect for thawed or heated food 20 and enabling the thawing or heating time to be shortened.

[0036] The bagged product 10 containing frozen food of this embodiment having the above-mentioned configuration can be used as follows, and consumers can easily eat thawed or heated food. That is, as shown in Figures 5 to 9, for example, a consumer who has purchased the above-mentioned bagged product 10 containing frozen food, places the bagged product 10 containing frozen food 20 in the bag 11 in a state in which one front film part 12a of the bag 11 provided with the steam exhaust part 17 faces upward, in a microwave oven 30 (see Figure 5), and operates the microwave oven for a predetermined time sufficient to thaw or heat the contained frozen food 20, thereby thawing or heating the frozen food 20 while exhausting steam from the steam exhaust part 17.

[0037] When the frozen food 20 is thawed or heated, the moisture contained in the stored frozen food 20 evaporates as water vapor, and this steam mixes with air, increasing the pressure inside the bag 11 and expanding the bag 11, making it possible to open the pair of left and right side film parts 13a, 13b sandwiched along the portions along the long sides of the pair of front and rear front film parts 12a, 12b from the V-shaped folded state as shown in Fig. 6. Also, as described above, by discharging steam inside the bag 11 while expanding and contracting the opening area of ​​the small holes 18 (see Fig. 4(f)) opened at the portions where both ends of the band-shaped part 17c in the steam discharge part 17 intersect with the cutting line 17d, the pressure inside the bag 11 is repeatedly lowered and increased, and the pressure inside the bag 11 is stably maintained within a certain range higher than normal pressure, making it possible to obtain an appropriate steaming effect on the thawed or heated food 20.

[0038] By operating the microwave oven 30 for a predetermined time sufficient to thaw or heat the contained frozen food 20, the frozen food 20 is thawed or heated while steam is discharged from the steam discharge section 17, and then the bag product 10 containing the thawed or heated food is removed from the microwave oven 30, and the thawed or heated food 20 is shifted to one side toward the side film section 13a on one of the long sides of the bag 11, as shown in Fig. 7. This makes it possible for the side film section 13a on one of the long sides, which has been opened from a V-shaped folded state due to the expansion of the bag 11, to be kept in an open state due to the weight of the thawed or heated food 20, to form the placement section 21 by the side film section 13a on the one of the long sides.

[0039] Thereafter, as shown in Fig. 8, the formed placement portion 21 is stably placed on the placement surface 22, for example, a table, by the weight of the thawed or heated food 20, and preferably the cutting line 17d of the cut steam discharge portion 17 is made to function as a cutting guide line, and the other long side portion of the front film portions 12a, 12b is cut off along the long side direction, so that it is possible to smoothly form the take-out opening 23 for taking out the thawed or heated food 20, as shown in Fig. 9. Furthermore, with the formed placement portion 21 stably placed on the placement surface 22, the consumer can take out the thawed or heated food 20 from the take-out opening 23 having a considerable size without transferring it to another container such as tableware, and can easily eat it while it is still contained in the bag 11, and when the contained food 20 is finished, the bag 11 in which the food 20 was contained can be easily disposed of as appropriate.

[0040] Therefore, according to the frozen food bag product 10 of this embodiment, the frozen food 20 contained in the bag 11 can be thawed or heated in a microwave oven 30, and then the food can be easily eaten while still contained in the bag 11, without having to be transferred to another container such as tableware.

[0041] In particular, according to the frozen food bag product 10 of this embodiment, at each end joint 15 along the short sides on both sides of the pair of front and rear front film parts 12a, 12b, the side film parts 13a, 13b are folded into a V shape, and the pair of V-shaped pieces are not joined to each other, but the ends of the side film parts 13a, 13b are joined only to the ends along the short sides on both sides of the pair of front and rear front film parts 12a, 12b, so that the side joint points 15a between the ends on both sides of the side film parts 13a, 13b and the ends along the short sides on both sides of the front film parts 12a, 12b are formed to expand in a V shape. As a result, when the weight of the thawed or heated food 20 causes the V-shaped folding of side film portion 13a on one of the long sides to be opened and placing portion 21 formed by side film portion 13a on one of the long sides to be placed on placing surface 22, side joint portion 15a which has expanded into a V-shape of end joint portion 15 does not come into direct contact with placing surface 22 and destabilize bag 11, so that placing portion 21 can be placed on placing surface 22 in a more stable state, making thawed or heated food 20 contained in bag 11 even easier to eat.

[0042] 10(a) and (b) show a frozen food-containing bag product 10' according to another preferred embodiment of the present invention. Regarding the frozen food-containing bag product 10' of another embodiment shown in FIG. 10(a) and (b), the components different from the frozen food-containing bag product 10 of the above embodiment will be mainly described, and the same components will be given the same reference numerals and will not be described. For components that are not particularly mentioned, the description of the frozen food-containing bag product 10 of the above embodiment will be applied as appropriate. In the frozen food-containing bag product 10' of another embodiment shown in FIG. 10(a) and (b), the side film portion 13a' sandwiched between the portions along the long sides of the pair of front film portions 12a and 12b is sandwiched in a state of being folded in a V shape into the portion along only one of the long sides of at least one of the long sides on both sides of the front film portions 12a and 12b. The other configuration is the same as that of the frozen food-containing bag product 10 of the above embodiment.

[0043] With another embodiment of the bag product 10' containing frozen food shown in Figures 10(a) and (b), a bag 11' containing thawed or heated food 20 removed from a microwave oven 30 is placed with the side film portion 13a' on one of the long sides of the front film portions 12a, 12b positioned downward, and the V-shaped fold of the side film portion 13a' positioned downward is opened due to the weight of the thawed or heated food. The side film portion 13a' positioned downward, which has been opened in a folded state, serves as a placing portion and is placed on a placing surface due to the weight of the thawed or heated food 20. The other long side portion of the front film portions 12a, 12b is then cut away along the long side direction to form an access opening, and the food 20 can be taken out and eaten through the formed access opening, thereby achieving the same effects as the bag product 10 containing frozen food of the above embodiment.

[0044] The present invention is not limited to the above-mentioned embodiments and can be modified in various ways. For example, the frozen food contained in the bag may be various other frozen foods such as frozen noodles and frozen fried foods, in addition to frozen rice. The film material forming the bag does not necessarily have to be a laminated film material consisting of a synthetic resin stretched film and a synthetic resin unstretched film having heat sealability laminated to the inside of the film. The steam exhaust section does not necessarily have to include a low-melting heat seal agent or release agent applied between the synthetic resin stretched film and the synthetic resin unstretched film, and a cutting line engraved vertically through the area where the agent is applied. [Industrial Applicability]

[0045] According to the bag product containing frozen food of the present invention, or the method of using the bag product containing frozen food, the frozen food contained in the bag can be thawed or heated in a microwave oven, and then the food can be easily eaten while still contained in the bag, without having to be transferred to another container such as tableware.

Claims

1. A bag product containing frozen food, in which a frozen food contained in a bag is thawed or heated using a microwave oven, and the thawed or heated food can be eaten using the bag as a container without transferring the food to another container, The bag is formed using a film material so as to have a pair of front and rear front film portions each having a rectangular front shape, and a side film portion folded into a V shape and sandwiched between a portion along at least one of the long sides of the front film portions, and portions along the short sides of the pair of front and rear front film portions are each joined as a joint portion to enclose a frozen food inside, and a steam exhaust portion is formed in one of the pair of front and rear front film portions, At each of the joints along the short sides of the pair of front and rear front film parts, the side film parts folded in a V shape are not joined to each other, and the ends of the side film parts are joined only to the ends along the short sides of the pair of front and rear front film parts, so that the joints between the ends on both sides of the side film parts and the ends along the short sides of the front film part are formed to expand in a V shape, a bag containing thawed or heated food removed from a microwave oven is placed with one of the long sides of the front film part positioned downward, and the V-shaped folded state of the lower side film part is opened due to the weight of the thawed or heated food, and the lower side film part, which has been opened in a folded state, is used as a placing part and placed on a placing surface due to the weight of the thawed or heated food, and the other long side of the front film part is cut away along the long side direction to form an opening for removal, and the food can be removed and eaten through the opening; the film material forming the bag is a laminated film material made of a stretched synthetic resin film and a heat-sealable unstretched synthetic resin film laminated to the inside of the stretched synthetic resin film, the steam exhaust section is interposed between the stretched synthetic resin film and the unstretched synthetic resin film, and includes a low-melting-point heat-sealing agent or release agent applied in a strip-like manner to the stretched synthetic resin film, and a cutting line engraved in a linear manner on the stretched synthetic resin film, longitudinally cutting the strip-like portion to which the low-melting-point heat-sealing agent or release agent is applied in the extension direction, from the strip-like portion to an area to which the low-melting-point heat-sealing agent or release agent is not applied, The steam exhaust section extends in a direction along the long side direction of one of the front film sections and is offset toward the other long side opposite the side film section on the one long side which serves as the placement section.

2. The bag is formed in a gusseted bag shape using a film material so as to have a pair of front and rear front film parts each having a rectangular front shape, and a pair of left and right side film parts folded in a V shape and sandwiched between the parts along the long sides of the front film parts, and the parts along the short sides of the front and rear front film parts are each joined as a joint, thereby sealing in a frozen food inside, and a steam exhaust part is formed in one of the pair of front and rear front film parts, 2. A bag product containing frozen food as described in claim 1, wherein at each of the joints along the short sides of the pair of front and rear front film sections, the pair of left and right side film sections folded in a V shape are not joined to each other, and the ends of the side film sections are joined only to the ends along the short sides of both sides of the pair of front and rear front film sections, so that the joints between the ends on both sides of the side film sections and the ends along the short sides of both sides of the front film section are formed to expand in a V shape.

3. 3. A bag product containing frozen food as described in claim 1 or claim 2, wherein the cutting line of the steam exhaust portion functions as a cutting guide line when, after the food contained in the bag is thawed or heated, the front film portion is cut along the long side direction to form an opening for removal.

4. 4. The bag product containing frozen food according to claim 1, wherein the frozen food contained in the bag is frozen cooked rice.

5. A method for using a bag containing frozen food, comprising the steps of: thawing or heating a frozen food contained in a bag using a microwave oven; and allowing the thawed or heated food to be eaten by using the bag as a container without transferring the food to another container, comprising: The bag is formed using a film material so as to have a pair of front and rear front film portions each having a rectangular front shape, and a side film portion folded into a V shape and sandwiched between a portion along at least one of the long sides of the front film portions, and portions along the short sides of the pair of front and rear front film portions are each joined as a joint portion to enclose a frozen food inside, and a steam exhaust portion is formed in one of the pair of front and rear front film portions, At each of the joints along the short sides of the pair of front and rear front film parts, the side film parts folded in a V shape are not joined to each other, and the ends of the side film parts are joined only to the ends along the short sides of the pair of front and rear front film parts, so that the joints between the ends on both sides of the side film parts and the ends along the short sides of the front film part are formed to expand in a V shape, a bag containing thawed or heated food removed from a microwave oven is placed with one of the long sides of the front film part positioned downward, and the V-shaped folded state of the lower side film part is opened due to the weight of the thawed or heated food, and the lower side film part, which has been opened in a folded state, is used as a placing part and placed on a placing surface due to the weight of the thawed or heated food, and the other long side of the front film part is cut away along the long side direction to form an opening for removal, and the food can be removed and eaten through the opening; the film material forming the bag is a laminated film material made of a stretched synthetic resin film and a heat-sealable unstretched synthetic resin film laminated to the inside of the stretched synthetic resin film, The steam exhaust section is interposed between the stretched synthetic resin film and the unstretched synthetic resin film, and includes a low-melting point heat-sealing agent or release agent that is applied in a strip-like manner to the stretched synthetic resin film, and a cutting line that is engraved in a linear manner on the stretched synthetic resin film, cutting the strip-like portion to which the low-melting point heat-sealing agent or release agent is applied in the extension direction, from the strip-like portion to an area to which the low-melting point heat-sealing agent or release agent is not applied. The bag product, in which a frozen food is contained in the bag, is placed in a microwave oven with one of the front film portions on which the steam exhaust section of the bag is formed facing upward, and is heated in the microwave oven for a predetermined time sufficient to thaw or heat the contained frozen food. a food processing unit for processing the food in a bag having a width of 100 mm or less and a width of 150 mm or less, the food being processed ...

6. The bag is formed in a gusseted bag shape using a film material so as to have a pair of front and rear front film parts each having a rectangular front shape, and a pair of left and right side film parts folded in a V shape and sandwiched between the parts along the long sides of the front film parts, and the parts along the short sides of the front and rear front film parts are each joined as a joint, thereby sealing in a frozen food inside, and a steam exhaust part is formed in one of the pair of front and rear front film parts, 6. A method for using a bag product containing frozen food as described in claim 5, wherein at each of the joints along the short sides of the pair of front and rear front film sections, the pair of left and right side film sections folded into a V shape are not joined to each other, and the ends of the side film sections are joined only to the ends along the short sides of both sides of the pair of front and rear front film sections, so that the joints between the ends on both sides of the side film sections and the ends along the short sides of both sides of the front film section are formed to expand in a V shape.

7. 7. A method for using a bag product containing frozen food according to claim 5 or claim 6, wherein the steam exhaust section extends in a direction along the long side direction of one of the front film sections and is biased toward the other long side side opposite the side film section on the one long side side which serves as the placement section.

8. 8. A method for using a bag product containing frozen food as described in claim 7, wherein the cutting line of the steam exhaust portion functions as a cutting guide line when, after thawing or heating the food contained in the bag, the front film portion is cut along the long side direction to form an opening for removal.

9. 9. A method for using the bag product containing frozen food according to claim 5, wherein the frozen food contained in the bag is frozen cooked rice.

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