Manufacturing method of packaging bag

Abstract

To provide a packaging bag which allows a user to easily grasp a package by the hand even when an article is in a heated state when the package containing the article is grasped by the hand.SOLUTION: A packaging bag manufacturing method according to the present invention includes the steps of: cutting an original packaging bag along a transverse direction using the original packaging bag in which a pair of opposing sheet planned portions that becomes a pair of opposing sheet portions, and a pair of covering member planned portions arranged to overlap the pair of opposing sheet planned portions respectively extend in a band shape along a longitudinal direction; and forming a main body side connecting portion in which both ends of the pair of opposing sheet portions are connected in a state where the pair of opposing sheet planned portions and the pair of covering member planned portions are bent so as to face each other.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for manufacturing a packaging bag for containing a heated item. [Background technology]

[0002] A packaging bag formed using a resin sheet has been known. The packaging bag includes a bag body that forms a storage space for storing an item. The bag body includes a pair of opposed sheet parts arranged to face each other, and the storage space is formed between the pair of opposed sheet parts (see Patent Document 1).

[0003] Incidentally, an item contained in such a packaging bag may be in a heated state before being contained in the packaging bag, or may be heated in a microwave oven, in a hot water bath, etc., while contained in the packaging bag. For example, if the item contained in the packaging bag is a cooked rice processed food (e.g., fried rice, rice balls, etc.), the cooked rice processed food contained in the packaging bag may be heated in a microwave oven, etc., when the cooked rice processed food is eaten. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-241439 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when gripping a package in which an item is contained in a packaging bag with one's hand, if the item is in a heated state, the heat of the item may be transferred to the hand through the packaging bag, making it difficult to grip the package with one's hand.

[0006] Therefore, an object of the present invention is to provide a packaging bag that allows the packaging body containing an item to be easily grasped by hand even when the item is in a heated state. [Means for solving the problem]

[0007] The present invention includes a bag body formed in a bag shape using a resin sheet and forming an accommodation space capable of accommodating an item to be heated, The bag body is a packaging bag comprising a pair of opposing sheet portions arranged to face each other, a storage space is formed between the pair of opposing sheet portions, and the storage space is closed at one end side of the pair of opposing sheet portions in one direction, The bag further includes a sheet-like covering member that covers, from the outside of the bag body, areas of the pair of opposing sheet portions that face each other across the storage space, The covering member is formed using at least one of paper and nonwoven fabric, and is disposed on one end side of the pair of opposing sheet portions in one direction, The covering member is formed in a band shape across both ends of the pair of opposing sheet portions in another direction intersecting the one direction, Both ends of the covering member overlap both ends of the opposing sheet, A method for producing a packaging bag, the method comprising the steps of: producing a packaging bag having a pair of opposed sheet portions each having a covered region covered with a covering member and a non-covered region not covered with the covering member, the method comprising the steps of: A packaging bag roll is used, in which a pair of opposing sheet portions to be a pair of opposing sheet portions and a pair of covering member portions arranged so as to overlap the pair of opposing sheet portions, respectively, extend in a belt shape along the longitudinal direction, A step of cutting the packaging bag roll along a short side direction; and forming a main body side connection portion in which both ends of the pair of opposing sheet portions are connected while folding the pair of opposing sheet portions and the pair of covering member portions so that they face each other.

[0008] According to this configuration, the bag body is provided with a sheet-like covering member that covers, from the outside of the bag body, areas of a pair of opposing sheet portions that are arranged across the storage space. The covering member is formed using at least one of paper and nonwoven fabric. The covering member is disposed on one end side of the pair of opposing sheet portions in one direction. The pair of opposing sheet portions have a covered area that is covered with the covering member and an uncovered area that is not covered with the covering member. The covered area is formed near one end of the pair of opposing sheet portions in one direction.

[0009] As a result, when the article is contained in the packaging bag to form a package, the heat of the article contained in the storage space is less likely to be transferred to the outside of the packaging bag at the portion of the packaging bag that has the covering member, and therefore, by holding the portion of the packaging bag that has the covering member with one's hand, the package can be easily held with one's hand without being affected by the heat of the article. In addition, since heat from the item is dissipated to the outside of the packaging bag through the uncovered areas, the item can be cooled more quickly than if the pair of opposing sheet portions were entirely covered with the covering member (if there were no uncovered areas). Effect of the Invention

[0010] As described above, according to the present invention, a packaging bag can be provided that allows the packaging body containing an item to be easily grasped by hand even when the item is in a heated state. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a plan view of a packaging bag according to one embodiment of the present invention, viewed from one of the opposing sheet portions. [Diagram 2] Cross-sectional view II of Figure 1. [Diagram 3] FIG. 2 is a plan view showing a packaging bag roll used to form the packaging bag according to the embodiment. [Figure 4] FIG. 11 is a plan view of a packaging bag according to another embodiment of the present invention, viewed from one of the opposing sheet portions. [Diagram 5]FIG. 11 is an end view of a cross section intersecting the axis of a tubular portion of a packaging bag according to yet another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] An embodiment of a packaging bag manufactured by the manufacturing method according to the present invention will be described below with reference to Figures 1 to 3. Note that in the following drawings, the same or corresponding parts are given the same reference symbols and their description will not be repeated. In the following description, one direction is the x-axis direction in each drawing, and the other direction is the y-axis direction in each drawing. The direction in which a pair of opposing sheet portions 11, 11 face each other is the z-axis direction.

[0013] As shown in Figures 1 and 2, the packaging bag 100 of this embodiment comprises a bag body 10 formed into a bag shape using a sheet material, and a sheet-like covering member 20 that covers a portion of the bag body 10 from the outside of the bag body 10.

[0014] The bag body 10 is formed using a resin sheet. The resin sheet is not particularly limited, and examples thereof include a non-axially oriented polypropylene (CPP) film, a biaxially oriented polypropylene (OPP) film, a polyethylene (PE) film, a biaxially oriented nylon (ONY) film, and a polyethylene terephthalate (PET) film. When the covering member 20 and the bag body 10 are heat-sealed as described below, it is preferable to use CPP or OPP as the resin sheet.

[0015] Moreover, the bag body 10 forms a storage space R capable of storing items. The bag body 10 also includes a pair of opposing sheet portions 11, 11 arranged to face each other across the storage space R, and a connecting sheet portion 12 connecting one end of the pair of opposing sheet portions 11, 11 in one direction. Specifically, the bag body 10 includes a tubular portion 10a formed in a cylindrical shape extending in one direction and having the storage space R formed therein, a closing portion 10b closing one end of the tubular portion 10a in the one direction, and an opening portion 10c formed at the other end of the tubular portion 10a in the one direction and opening the storage space R to the outside.

[0016] The cylindrical portion 10a is formed by a pair of opposing sheet portions 11, 11. Specifically, the cylindrical portion 10a is formed by connecting both ends of one opposing sheet portion 11 in another direction intersecting the one direction and both ends of the other opposing sheet portion 11 in the other direction to form a cylindrical shape. The blocking portion 10b is formed by a connecting sheet portion 12.

[0017] The pair of opposing sheet portions 11, 11 and the connecting sheet portion 12 are formed using a single resin sheet. Specifically, the single resin sheet has regions that will become the pair of opposing sheet portions 11, 11, and a region that will become the connecting sheet portion 12 between the regions. The resin sheet is then folded at the boundary between the region that will become the pair of opposing sheet portions 11, 11 and the region that will become the connecting sheet portion 12, so that the regions that will become the pair of opposing sheet portions 11, 11 are arranged to face each other, and the region that will become the connecting sheet portion 12 is folded between the regions that will become the pair of opposing sheet portions 11, 11. As a result, the pair of opposing sheet portions 11, 11 and the connecting sheet portion 12 are formed.

[0018] The bag body 10 also has a pair of main body side connecting parts S1 formed by connecting both ends of one opposing sheet part 11 in the other direction to both ends of the other opposing sheet part 11 in the other direction. The pair of main body side connecting parts S1 are formed continuously (specifically, in a band shape) along the one direction. Each main body side connecting part S1 also has a region where the end of one opposing sheet part 11 is directly connected to the end of the other opposing sheet part 11, and a region where they are indirectly connected via the end of the connecting sheet part 12 in the other direction.

[0019] The bag body 10 also has a notch 11a formed by cutting out at least one of both end portions in the other direction (specifically, the pair of body side connecting portions S1). The notch 11a is formed in each of the pair of body side connecting portions S1 (specifically, at a position facing each other in the other direction).

[0020] The pair of opposing sheet portions 11, 11 includes a covered region 11b that is covered with the covering member 20 and an uncovered region 11c that is not covered with the covering member 20.

[0021] The covered region 11b is formed in the vicinity of one end of the pair of opposing sheet portions 11, 11 in the one direction. Also, the covered region 11b is formed in at least a part (preferably a central part) of the region between both ends of the pair of opposing sheet portions 11, 11 in the other direction. Specifically, the covered region 11b is formed in the entire region between both ends of the pair of opposing sheet portions 11, 11 in the other direction.

[0022] The uncovered region 11c is formed in a region on one end side of the pair of opposing sheet portions 11, 11 from the covered region 11b in the one direction and including the one end (hereinafter also referred to as one end uncovered region 11d), and a region on the other end side (i.e., the opening 10c side) of the pair of opposing sheet portions 11, 11 from the covered region 11b in the one direction (hereinafter also referred to as other end uncovered region 11e). That is, in the one direction, the covered region 11b is formed between the one end uncovered region 11d and the other end uncovered region 11e.

[0023] The one-end uncovered region 11d is formed in a band shape extending in the other direction. The width of the one-end uncovered region 11d formed in a band shape is not particularly limited, and may be, for example, 3 mm to 5 mm.

[0024] The other end uncovered region 11e is formed in the entire region closer to the other end of the pair of opposing sheet portions 11, 11 than the covered region 11b in the one direction. Further, the other end uncovered region 11e is formed with a notch 11a.

[0025] The covering member 20 is formed using at least one of paper and nonwoven fabric. When the covering member 20 and the bag body 10 (specifically, the pair of opposing sheet portions 11, 11) are heat-sealed as described below, the sheet material forming the covering member 20 is preferably one having a paper or nonwoven fabric layer and a thermoplastic resin layer. Examples of the paper include Japanese paper, rayon, Unryu paper, and pure white paper. The paper may be oil-resistant or water-resistant, or may have heat-sealing properties. The paper may have a basis weight of 9 g / m2 or more. 2 More than 100g / m 2 It may be the following. Examples of the nonwoven fabric include PP-based nonwoven fabric, PE-based nonwoven fabric, etc. The nonwoven fabric may have a thickness of 0.15 mm or more and 0.5 mm or less. Examples of the thermoplastic resin include polyethylene (PE) and polypropylene (PP). The thickness of the covering member 20 is not particularly limited, but is preferably, for example, 30 μm or more.

[0026] The covering member 20 is disposed so as to cover, from the outside of the bag body 10, the areas of the pair of opposing sheet portions 11, 11 that face each other across the storage space R. Specifically, the packaging bag 100 includes a pair of covering members 20, 20, and one of the areas of the pair of opposing sheet portions 11, 11 that face each other across the storage space R is covered by one covering member 20, and the other of the areas of the pair of opposing sheet portions 11, 11 that face each other across the storage space R is covered by the other covering member 20.

[0027] Moreover, the covering member 20 is disposed on one end side (specifically, closer to the one end side than the center portion) of the pair of opposing sheet portions 11, 11 in the one direction. Furthermore, the covering member 20 is disposed on the other end side of one end of the pair of opposing sheet portions 11, 11 in the one direction. Specifically, the covering member 20 is disposed at a position 3 mm to 5 mm away from one edge of the pair of opposing sheet portions 11, 11 toward the other end side in the one direction.

[0028] The covering member 20 is formed so as to cover at least a part (preferably a central part) of the region between both ends of the pair of opposing sheet portions 11, 11 in the other direction. Specifically, the covering member 20 is formed in a band shape so as to cover the entire region between both ends of the pair of opposing sheet portions 11, 11 in the other direction.

[0029] The length between both ends of the covering member 20 in the one direction (i.e., the length corresponding to the length between both ends of the covering region 11b in the one direction) is not particularly limited. For example, the length between both ends of the covering member 20 in the one direction may be 1.5 times or more, 2 times or more, 10 times or less, or 3 times or less than the length between both ends of the connecting sheet part 12 in the one direction (between both ends extending in the other direction) in a state where the connecting sheet part 12 is completely folded. In addition, the length between both ends of the covering member 20 in the one direction may be 50 mm or more, 55 mm or more, 60 mm or more, 100 mm or less, or 90 mm or less.

[0030] The covering member 20 is disposed such that both ends in the other direction overlap with the pair of main body side connecting portions S1, S1. The covering member 20 is connected at both ends in the other direction to the pair of main body side connecting portions S1, S1 (specifically, connected in a band shape along the one direction).

[0031] The covering member 20 includes a covering member joining portion 20a joined to the bag body 10 (specifically, the pair of opposing sheet portions 11, 11) and a covering member non-joining portion 20b not joined to the bag body 10 (specifically, the pair of opposing sheet portions 11, 11). Specifically, the covering member 20 includes the covering member joining portion 20a and the covering member non-joining portion 20b in a region between both ends in the other direction.

[0032] The covering member joints 20a are formed so as to be scattered in a staggered pattern in the region between both ends of the covering member 20 in the other direction. The covering member non-joining portion 20b is continuously formed from a region inside the end of the covering member 20 to reach the end of the covering member 20. Specifically, the covering member non-joining portion 20b is formed in a region inside the end of the covering member 20 and at both ends of the covering member 20 in the one direction (more specifically, at both ends of the band-like shape extending in the other direction). The covering member non-joining portion 20b inside the end of the covering member 20 and the covering member non-joining portion 20b at both ends of the covering member 20 are formed so as to be continuous with each other. As a result, the covering member non-joining portion 20b is continuously formed from a region inside the end of the covering member 20 to reach both ends of the covering member 20.

[0033] As described above, the covering member non-joined portions 20b are continuously formed from the region inside the end of the covering member 20 to reach both ends of the covering member 20, so that air is discharged between the pair of opposing sheet portions 11', 11' and the covering member portion 20' when the packaging bag original sheet 200 described later is rolled into a roll. Therefore, the packaging bag original sheet 200 can be stably rolled into a roll.

[0034] The method of joining the covering member 20 and the bag body 10 (specifically, a pair of opposing sheet portions 11, 11) is not particularly limited, and may be, for example, a method of heat-sealing the covering member 20 and the bag body 10 (specifically, a pair of opposing sheet portions 11, 11) together, or a method using an adhesive or an adhesive sheet.

[0035] The packaging bag 100 configured as described above can be formed from a packaging bag roll 200 shown in FIG. The packaging bag original roll 200 has a pair of intended opposing sheet portions 11', 11' which become a pair of intended opposing sheet portions 11, 11 at both ends in one direction. The packaging bag original roll 200 also has a intended connecting sheet portion 12' which becomes a connecting sheet portion 12 between the pair of intended opposing sheet portions 11', 11' in the one direction. The packaging bag original roll 200 also has intended covering member portions 20' which become the covering member 20 and are arranged so as to overlap the pair of intended opposing sheet portions 11', 11'. The packaging bag original roll 200 (the pair of intended opposing sheet portions 11', 11', the intended connecting sheet portion 12', and the intended covering member portion 20') is formed in an elongated shape in the other direction.

[0036] Then, a sheet material 201 of a predetermined size is cut out from the packaging bag original roll 200, and the sheet material 201 is folded at the boundary between the pair of opposing sheet portions 11', 11' and the intended connecting sheet portion 12' to make the pair of opposing sheet portions 11', 11' face each other, and the intended connecting sheet portion 12' is folded between the pair of opposing sheet portions 11', 11'. This forms the pair of opposing sheet portions 11, 11 and the connecting sheet portion 12. Then, both end portions of one opposing sheet portion 11 in the other direction and both end portions of the other opposing sheet portion 11 in the other direction are connected to form main body side connecting portions S1, thereby forming the packaging bag 100.

[0037] The packaging bag 100 configured as described above contains a heated item. The item contained in the packaging bag 100 is not particularly limited, and may be, for example, a granular, powdered, or liquid item. The item contained in the packaging bag 100 may be, for example, a food such as a cooked rice food (specifically, fried rice, rice balls, etc.), a sandwich, or a curry, or may be an item other than a food. Furthermore, the article to be contained in the packaging bag 100 may be heated before being contained in the packaging bag 100, or may be heated after being contained in the packaging bag 100. The method for heating the article is not particularly limited, and examples thereof include a microwave oven, an oven, and a hot water bath.

[0038] When the packaging bag 100 contains an article, the storage space R is closed. The method for closing the storage space R is not particularly limited, and for example, the storage space R may be closed by sealing the opening 10c of the tubular portion 10a so as to close it. Alternatively, the storage space R may be closed by twisting the tubular portion 10a (specifically, the pair of opposing sheet portions 11, 11) at a position between the article contained in the packaging bag 100 and the opening 10c.

[0039] As described above, according to the packaging bag 100 of this embodiment, when a package containing an item is grasped by hand, the package can be easily grasped by hand even when the item is in a heated state.

[0040] That is, the bag body 10 includes a sheet-like covering member 20 that covers opposing areas of a pair of opposing sheet portions 11, 11 that are provided in the bag body 10 with the storage space R therebetween from the outside of the bag body 10. The covering member 20 is formed using at least one of paper and nonwoven fabric. The covering member 20 is disposed on one end side of the pair of opposing sheet portions 11, 11 in one direction. The pair of opposing sheet portions 11, 11 include a covered area 11b that is covered with the covering member 20 and an uncovered area 11c that is not covered with the covering member 20. The covered area 11b is formed in the vicinity of one end of the pair of opposing sheet portions 11, 11 in one direction.

[0041] As a result, when an article is contained in the packaging bag 100 to form a package (not shown), the heat of the article contained in the storage space R is less likely to be transferred to the outside of the packaging bag 100 at the portion of the packaging bag 100 that has the covering member 20. Therefore, by gripping the portion of the packaging bag 100 that has the covering member 20 with one's hand, the package can be easily gripped without being affected by the heat of the article. In addition, since the heat of the article is dissipated to the outside of the packaging bag 100 from the uncovered region 11c, the article can be cooled more quickly than when the pair of opposing sheet portions 11, 11 are entirely covered with the covering member 20 (when the uncovered region 11c is not provided).

[0042] The bag body 10 also includes a connecting sheet portion 12 that connects one ends of the pair of opposing sheet portions 11, 11 in the one direction. The uncovered region 11c is formed in a region that is closer to one end of the pair of opposing sheet portions 11, 11 than the covered region 11b in the one direction and includes the one end, and in a region that is closer to the other end of the pair of opposing sheet portions 11, 11 than the covered region 11b in the one direction.

[0043] Here, in a state where an article is contained in the packaging bag 100 to form a package (not shown), if the article contained in the packaging bag 100 is granular or powdery, the article may accumulate near the connecting position between one end of the pair of opposing sheet parts 11, 11 in the one direction and the connecting sheet part 12. However, as described above, by forming the uncovered area 11c (hereinafter also referred to as the one-end uncovered area 11d) in the area including one end of the pair of opposing sheet parts 11, 11 in the one direction, the one-end uncovered area 11d of the packaging bag 100 becomes more easily deformed than the area provided with the covering member 20. As a result, even if the article accumulates near the connecting position between one end of the pair of opposing sheet parts 11, 11 in the one direction and the connecting sheet part 12, the accumulated article can be easily removed by deforming the one-end uncovered area 11d.

[0044] Moreover, the covering member 20 is formed in a strip shape across both ends of the pair of opposing sheet portions 11, 11 in another direction intersecting the one direction. Therefore, when an article is contained in the packaging bag 100 and a package (not shown) is formed, the area of ​​the packaging bag 100 including the covering member 20 can be more easily gripped by hand.

[0045] The covering member 20 also includes a covering member joint portion 20a that is joined to the bag body 10, and a covering member non-joined portion 20b that is not joined to the bag body 10. The covering member non-joined portion 20b is formed continuously from a region on the inside of the end portion of the covering member 20 to reach the end portion of the covering member 20.

[0046] Therefore, when an item is contained in the packaging bag 100 and a package (not shown) is formed, heat between the non-jointed portion 20b of the covering member and the bag body 10 is discharged from between the end of the covering member 20 and the bag body 10, making it easier to grasp the area of ​​the packaging bag 100 that has the covering member 20 with the hand.

[0047] The packaging bag manufactured by the manufacturing method according to the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the present invention. In addition, the configurations, methods, etc. of the above-mentioned multiple embodiments may be arbitrarily adopted and combined (the configurations, methods, etc. of one embodiment may be applied to the configurations, methods, etc. of other embodiments), and further, the configurations, methods, etc. of the various modified examples described below may be arbitrarily selected and adopted in the configurations, methods, etc. of the above-mentioned embodiments.

[0048] For example, in the above embodiment, the covering member non-joined portion 20b is formed continuously from a region inside the end of the covering member 20 to reach the end of the covering member 20, but this is not limited to the above. For example, as shown in Fig. 4, a covering member joint 20a may be formed between a covering member non-joining portion 20b formed on the inside of the end of the covering member 20 and a covering member non-joining portion 20b formed at the end of the covering member 20, so that the covering member non-joining portion 20b on the inside of the end of the covering member 20 does not reach the covering member non-joining portion 20b at the end of the covering member 20. Specifically, the covering member joint 20a is formed in a band shape over the entire area between both ends of a pair of opposing sheet portions 11, 11 (specifically, the cylindrical portion 10a) in the other direction, and a plurality of the covering member joints 20a are formed at intervals in the one direction. Then, the covering member non-joining portions 20b are formed in both ends of the covering member 20 in the one direction and in the area between the adjacent covering member joints 20a (i.e., the area inside the end of the covering member 20). As a result, the covering member joints 20a are located between the covering member non-joined portions 20b formed at both ends of the covering member 20 in the one direction and the covering member non-joined portions 20b formed between adjacent covering member joints 20a (i.e., on the inside of the ends of the covering member 20). Therefore, the covering member non-joined portions 20b on the inside of the ends of the covering member 20 are configured not to reach the covering member non-joined portions 20b at the ends of the covering member 20 due to the covering member joints 20a.

[0049] As a result, when an article is contained in the packaging bag 100 to form a package (not shown), an air layer is likely to form between the bag body 10 and the non-jointed portion 20b of the covering member 20 located inside the end of the covering member 20, making it more difficult for heat from the article to be transmitted to the outside of the packaging bag 100. Therefore, the area of ​​the packaging bag 100 that includes the covering member 20 can be more easily gripped with the hand.

[0050] In the above embodiment, the tubular portion 10a is composed of only a pair of opposing sheet portions 11, 11, but the present invention is not limited to this. For example, as shown in Fig. 5, the pair of opposing sheet portions 11, 11 may constitute a part of the tubular portion 10a. Specifically, in the case of the tubular portion 10a in which the back-bonding portion 10d is formed by connecting opposing ends of a single resin sheet, the pair of opposing sheet portions 11, 11 may be constituted by a part of the region of the tubular portion 10a on the back-bonding portion 10d side and a region opposite to the part. In this case, the bag body 10 does not need to have the main body side connecting portion S1.

[0051] In the above embodiment, the pair of opposing sheet portions 11, 11 have their one end portions in the one direction indirectly connected to each other by the connecting sheet portion 12, but this is not limited thereto, and for example, the one end portions may be directly connected to each other. In such a case, the bag body 10 is configured not to include the connecting sheet portion 12. Then, the closing portion 10b is formed by directly connecting the one end portions of the pair of opposing sheet portions 11, 11 in the one direction to each other.

[0052] In the above embodiment, the pair of opposing sheet portions 11, 11 and the connecting sheet portion 12 are formed using a single resin sheet, but this is not limited thereto, and for example, one opposing sheet portion 11, the other opposing sheet portion 11 and the connecting sheet portion 12 may be formed using separate resin sheets. In addition, when the bag body 10 does not include the connecting sheet portion 12, each of the pair of opposing sheet portions 11, 11 may be formed using a separate resin sheet.

[0053] In addition, in the above embodiment, the covering member 20 is configured to have a covering member joint portion 20a and a covering member non-joining portion 20b, but this is not limited to this and may be configured to have, for example, only the covering member joint portion 20a.

[0054] In addition, in the above embodiment, the covering member joint portions 20a are formed so as to be scattered in a staggered pattern or in a band shape, but this is not limited to this and may be formed, for example, in a straight line or in a ring shape (specifically, so as to surround the covering member non-joined portions 20b).

[0055] In the above embodiment, the packaging bag 100 is configured such that each of the pair of opposing sheet portions 11, 11 is partially covered by each of the pair of covering members 20, but this is not limited thereto. For example, the covering member 20 may be formed in a cylindrical shape, and the bag body 10 (the pair of opposing sheet portions 11, 11) may be disposed inside the cylindrical covering member 20, so that the regions of the pair of opposing sheet portions 11, 11 that face each other across the storage space R are covered from the outside of the bag body 10 by the annular covering member 20.

[0056] In addition, in the above embodiment, the connecting sheet portion 12 is not covered with the covering member 20, but this is not limited to this, and for example, the connecting sheet portion 12 may be configured so that at least a portion of the connecting sheet portion 12 is covered with the covering member 20.

[0057] In the above embodiment, the bag body 10 is configured to include the one-end uncovered region 11d and the other-end uncovered region 11e, but is not limited thereto, and may be configured to include only the other-end uncovered region 11e. In such a case, the covering member 20 is disposed so as to cover one end of the pair of opposing sheet portions 11, 11 in the one direction. [Explanation of symbols]

[0058] 10...bag body, 10a...tubular portion, 10b...closing portion, 10c...opening, 10d...back lining portion, 11...facing sheet portion, 11'...facing sheet portion to be, 11a...notch portion, 11b...covered region, 11c...non-covered region, 11d...one end side non-covered region, 11e...other end side non-covered region, 12...connecting sheet portion, 12'...covering member portion to be, 20...covering member, 20'...covering member portion to be, 20a...covering member joint portion, 20b...covering member non-join portion, 100...packaging bag, 200...packaging bag roll, 201...sheet material, R...storage space, S1...main body side joint portion

Claims

[Claim 1] The bag body is formed into a bag shape using a resin sheet and has a storage space capable of storing an item to be heated. The bag body is a packaging bag comprising a pair of opposing sheet portions arranged to face each other, a storage space is formed between the pair of opposing sheet portions, and the storage space is closed at one end side of the pair of opposing sheet portions in one direction, The bag further includes a sheet-like covering member that covers, from the outside of the bag body, areas of the pair of opposing sheet portions that face each other across the storage space, The covering member is formed using at least one of paper and nonwoven fabric, and is disposed on one end side of the pair of opposing sheet portions in one direction, The covering member is formed in a band shape across both ends of the pair of opposing sheet portions in another direction intersecting the one direction, Both ends of the covering member overlap both ends of the opposing sheet, A method for producing a packaging bag, the method comprising the steps of: producing a packaging bag having a pair of opposed sheet portions each having a covered region covered with a covering member and a non-covered region not covered with the covering member, the method comprising the steps of: A packaging bag roll is used, in which a pair of opposing sheet portions to be a pair of opposing sheet portions and a pair of covering member portions arranged so as to overlap the pair of opposing sheet portions, respectively, extend in a belt shape along the longitudinal direction, A step of cutting the packaging bag roll along a short side direction; and forming a main body side connection portion in which both ends of the pair of opposing sheet portions are connected while folding the pair of opposing sheet portions and the pair of covering member portions so that they face each other.

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