JP2019167120A - Pouch - Google Patents

Abstract

To provide a pouch which enables forming an opening inducing part when heated.SOLUTION: A pouch 10-1 is made of a packing raw material 30 at least consisting of a base material layer 31 and a sealant layer 32. It has a sealing part 15 for sealing the pouch 10-1, and the packing raw material 30 has a partly arranged heating ink layer 33. When heated, the heating ink layer 33 forms through holes at least in the base material layer 31 of the packing raw material 30 for functioning as an opening inducing part of the pouch 10-1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pouch.

  2. Description of the Related Art Conventionally, pouches that can be heated in a microwave oven or the like and can store contents are widely used. Among such pouches, there is a pouch equipped with a steam venting mechanism that allows steam generated by heating in a microwave oven to escape to the outside of the pouch. As a vapor release mechanism, a heat-generating ink layer that generates heat by microwaves may be used (for example, see Patent Document 1).

JP 2017-159912 A

  By the way, in order to facilitate opening, the pouch may be provided with an opening guide portion such as a half-cut line that guides opening in a predetermined direction separately from the notch. However, if the opening guide part is formed with a half-cut line, the half-cut line must be formed with a laser or a cutting tool in a separate process from the manufacturing process of the packaging material that the pouch constitutes, which requires a lot of labor. For this reason, at present, it is required to form the opening guide portion by another means instead of the half-cut line.

  The present invention has been made to solve the above problems. That is, an object is to provide a pouch capable of forming an opening guide when heated.

  According to one aspect of the present invention, there is provided a pouch formed using a packaging material including at least a base material layer and a sealant layer, the sealing material for sealing the pouch, and the packaging material comprising a part The heat-generating ink layer is further provided, and the heat-generating ink layer forms a hole that penetrates at least the base material layer of the packaging material when heated, and functions as an opening guide portion. A pouch is provided that is formed.

  In the pouch, one end of the heat generating ink layer may be located in the seal portion.

  The pouch includes a first end portion and a second end portion opposite to the first end portion, wherein the seal portion is formed at the first end portion, and the second end portion. A second end seal portion formed at an end, wherein one end of the heat generating ink layer is located in the first end seal portion, and the other end of the heat generating ink layer is the second end seal. It may be located within the department.

  In the pouch, the heat generating ink layer may be linear.

  The pouch may be a chilled food or frozen food pouch.

  According to one aspect of the present invention, it is possible to provide a pouch capable of forming an opening guide when heated.

It is a front view of the pouch concerning a 1st embodiment. It is sectional drawing along the II line | wire of the pouch shown by FIG. It is a top view for demonstrating the dimension of each component of the pouch shown by FIG. It is a modification of an opening start means. It is sectional drawing of the packaging material used for the pouch which concerns on 1st Embodiment. It is the figure which opened the pouch shown by FIG. It is a front view of the other pouch which concerns on 1st Embodiment. It is the figure which showed typically the manufacturing process of the pouch which concerns on 1st Embodiment. It is the figure which showed typically the manufacturing process of the pouch which concerns on 1st Embodiment. It is the figure which showed typically the manufacturing process of the pouch which concerns on 1st Embodiment. It is a front view of the pouch concerning a 2nd embodiment. It is a top view for demonstrating the dimension of each component of the pouch shown by FIG. It is a front view of the pouch concerning a 3rd embodiment. It is a front view of the pouch concerning a 4th embodiment. It is a top view for demonstrating the dimension of each component of the pouch shown by FIG.

[First Embodiment]
Hereinafter, a pouch according to a first embodiment of the present invention will be described with reference to the drawings. 1 is a front view of the pouch according to the present embodiment, FIG. 2 is a cross-sectional view taken along line II of the pouch shown in FIG. 1, and FIG. 3 is a component of the pouch shown in FIG. It is a top view for demonstrating the dimension. 4 is a modified example of the opening start means, FIG. 5 is a cross-sectional view of the packaging material used in the pouch according to the present embodiment, and FIG. 6 is a view in which the pouch shown in FIG. 1 is opened. FIG. 7 is a front view of another pouch according to the present embodiment, and FIGS. 8 to 10 are diagrams schematically showing a manufacturing process of the pouch according to the present embodiment.

<< Pouch >>
The pouch 10-1 shown in FIG. 1 has a storage space for storing contents. Although it does not specifically limit as a content, A foodstuff etc. are mentioned. Specific contents include chilled foods, frozen foods, snacks, and dried foods. However, the contents are not limited to these.

  Examples of chilled foods include takoyaki, fried potatoes, fried chicken, Chinese buns, hamburger, meatballs, meat cutlets, croquettes, chicken nuggets, shumai, gyoza, sausage, tonkatsu, caraage, meat dumplings, tempura, green soybeans, and other side dishes. .

  As frozen foods, frozen noodles (frozen pasta, frozen fried noodles, frozen noodles, frozen ramen, frozen vermicelli etc.), for example, frozen side dishes (for example, frozen hijiki, boiled frozen dried radish, frozen meat jaguar, frozen boiled fish, Frozen Chikuzenni, Frozen Soup, Sesame with Frozen Vegetables), Frozen Rice (Frozen Fried Rice, Frozen Pilaf, Frozen Chicken Rice, Frozen Dried Curry, Frozen Boiled Rice, Frozen Boiled Rice, Frozen Boiled Rice, etc.) It is done.

  Snacks include rice crackers such as rice crackers and hail, direct puff snacks, potato chips, corn chips, nuts, pretzels, popcorn, etc., which are mainly made from starchy agricultural products such as potato, wheat flour, corn, rice, etc. Is mentioned. In addition, the snack confectionery shape | molded from these raw materials may be fried or may not be fried.

  Examples of dried food include dried seafood and dried meat. Examples of dried fish include molluscs such as squid and octopus, shellfish such as shrimp and crab, shellfish such as scallop, clam and clam, and fish such as cod, tuna, bonito and salmon. . Examples of the dried meat include dried foods made from beef, pork, pork skin, chicken meat, chicken skin, turkey, and the like.

  As shown in FIG. 2, the pouch 10-1 has a front surface 11, a back surface 12, and a bottom surface 13. The front surface 11 and the back surface 12 have a rectangular outline. In the state shown in FIG. 1, the bottom surface 13 is folded in half.

  The pouch 10-1 includes a first end 10A, a second end 10B opposite to the first end 10A, a third end 10C extending between the first end 10A and the second end 10B, and a second end 10B. And four end portions 10D. The fourth end 10D is an end opposite to the third end 10C. In a state where the pouch 10-1 is self-supporting, the first end 10A and the second end 10B are located on the side, the third end 10C is located on the bottom, and the fourth end 10D is located on the top. is doing.

  The ratio (H1 / W1) of the height H1 (see FIG. 3) of the pouch 10-1 to the width W1 (see FIG. 3) of the pouch 10-1 is preferably 0.6 or more and 2.0 or less. If H1 / W1 is 0.6 or more, more contents can be accommodated, and if H1 / W1 is 2.0 or less, the pouch 10-1 can be stably made independent before opening. Can do. The width W1 of the pouch 10-1 is the length of the pouch 10-1 in the horizontal direction DR1. Specifically, the width W1 of the pouch 10-1 is the length from the outer edge 10E of the first end 10A to the outer edge 10F of the second end 10B. When the width P1 of the pouch is not constant, the width of the pouch is the shortest value. The height H1 of the pouch 10-1 is the length of the pouch 10-1 in the height direction DR2. Specifically, the height H of the pouch 10-1 is the length from the outer edge 10G of the third end portion 10C to the outer edge 10H of the fourth end portion 10D. If the length of the pouch is not constant, the height of the pouch is the largest value. The dimensions of the pouch and the dimensions of the constituent elements constituting the pouch in the first to third embodiments are all values measured in a state in which the pouch is substantially planar without expanding the gusset folding portion of the pouch.

  As shown in FIG. 1, the pouch 10-1 has a gusset folding portion 14 that is folded by a gusset method on the third end portion 10 </ b> C side.

<Guset insert part>
The gusset folding part 14 is formed by folding the bottom surface 13 in half. By providing the gusset folding part 14 on the third end 10C side, a larger content can be accommodated and the pouch 10-1 can be made independent.

  The ratio (W2 / H1) of the width W2 (see FIG. 3) of the gusset folding part 14 to the height H1 of the pouch 10-1 is preferably 0.2 or more and 0.7 or less. If said W2 / H1 is 0.2 or more, when the pouch 10-1 is made independent, the pouch can be stably made independent. If W2 / H1 is 0.7 or less, more contents can be accommodated. The width W2 of the gusset folding part 14 is the length of the gusset folding part 14 in the height direction DR2. Specifically, it is the length from the outer edge 10G of the third end portion 10C to the folding line 14A. When the width of the gusset folding part is not constant, the width of the gusset folding part is the shortest value. The width W2 of the gusset folding part 14 may be 20 mm or more and 50 mm or less.

  As shown in FIG. 1, the pouch 10-1 includes a seal portion 15 for sealing the pouch 10-1. The seal portion 15 in the pouch 10-1 includes a first end seal portion 16 formed at the first end portion 10A, a second end seal portion 17 formed at the second end portion 10B, and a third end portion. A third end seal portion 18 formed at 10C, and a folding seal portion 19 formed across the first end seal portion 16, the second end seal portion 17 and the third end seal portion 18. I have.

<First to third end seals>
The first end seal portion 16 seals between the front surface 11 and the back surface 12, between the front surface 11 and the bottom surface 13, and between the back surface 12 and the bottom surface 13 at the first end portion 10A. It is a part. The second end seal portion 17 seals between the front surface 11 and the back surface 12, between the front surface 11 and the bottom surface 13, and between the back surface 12 and the bottom surface 13 at the second end portion 10B. It is a part. The third end seal portion 18 is a portion that seals between the front surface 11 and the bottom surface 13. Since the pouch shown in FIG. 1 is made by folding a single packaging material, it is necessary to seal the front surface 11 and the bottom surface 13 with the third end seal portion 18. At the three end portions, the back surface 12 and the bottom surface 13 are formed by folding the packaging material, and the front surface 11 and the back surface 12 are also folded at the fourth end portion of the pouch 10-1. Therefore, it is not necessary to seal. However, the back surface 12 and the bottom surface 13 may be sealed at the third end portion, and the front surface 11 and the back surface 12 may be sealed at the fourth end portion. The 1st end part seal part 16, the 2nd end part seal part 17, and the 3rd end part seal part 18 are formed by heat-sealing packaging materials 30 mentioned below.

  The first end seal portion 16 and the second end seal portion 17 are formed from the outer edge 10G of the third end portion 10C to the outer edge 10H of the fourth end portion 10D, and the third end seal portion 18 is It straddles the first end seal portion 16 and the second end seal portion 17. The outer edge 16A of the first end seal portion 16 is an outer edge 10E, the outer edge 17A of the second end seal portion 17 is an outer edge 10F, and the outer edge 18A of the third end seal portion 18 is the outer edge 10G. It has become.

  The width W3 (see FIG. 3) of the first end seal portion 16, the width W4 (see FIG. 3) of the second end seal portion 17 and the width W5 (see FIG. 3) of the third end seal portion 18 are, for example, , And preferably 5 mm or more and 20 mm or less, respectively. If the width W3 of the first end seal portion 16, the width W4 of the second end seal portion 17, and the width W5 of the third end seal portion 18 are each 5 mm or more, the first end seal portion 16, The two end seal portion 17 and the third end seal portion 18 can be surely sealed, and if it is 20 mm or less, a wider accommodation space can be secured. In this specification, “width” in each seal portion means a length in a direction orthogonal to the extending direction of the seal portion. In addition, when the width | variety of a seal part is not constant, let the width | variety of a seal part be the shortest value among the length of the direction orthogonal to the direction where a seal part is extended.

  The bottom surface 13 has a semicircular cutout 13A at a part of the first end portion 10A and the second end portion 10B on the bottom surface 13. In FIG. 1, since the bottom surface 13 is folded in half, the notch 13 </ b> A is provided so as to penetrate the overlapping portion of the bottom surface 13. By providing such a notch 13A, the front surface 11 and the back surface 12 can be directly heat-sealed in the first end seal portion 16 and the second end seal portion 17, so that the gusset folding portion 14 The independence of the pouch 10-1 can be increased without inhibiting the spread of the pouch 10-1. That is, from the viewpoint of expanding the gusset folding portion when filling the content space into the storage space, it is necessary that the front surface and the back surface are separated from each other at the center of the bottom of the pouch, but at the bottom of the pouch, If the front and back surfaces are completely separated, the front and back surfaces will not be able to bear the weight of the contents and the front and back surfaces will open when the storage space is filled with the contents. The pouch may become difficult to stand on its own. For this reason, by forming a notch in a part of the first end portion 10A and the second end portion 10B on the bottom surface 13, portions of the first end portion 10A and the second end portion 10B of the bottom surface 13 of the pouch 10-1. The front surface 11 and the back surface 12 are joined. Therefore, the self-supporting property of the pouch 10-1 can be improved stably without inhibiting the spread of the gusset folding part 14. In FIG. 1, the shape of the notch 13 </ b> A is a semicircular shape, but the shape is not limited. For example, the cutout 13A may be a polygon such as a triangle or a quadrangle.

<Folding seal part>
The folding seal part 19 is formed in order to improve the independence of the pouch 10-1. The width W6 (see FIG. 2) of the folding seal portion 19 is preferably 5 mm or more and 20 mm or less, for example. If the width W6 of the fold seal part 19 is 5 mm or more, the fold seal part 19 can be reliably sealed, and if it is 20 mm or less, a wider accommodation space is secured while improving the self-supporting property of the pouch 10-1. can do.

  As shown in FIG. 1, the first end seal portion 16 and the second end seal portion 17 are provided with an opening start means 20 that can be a starting point for opening. The opening start means 20 only needs to be provided in either the first end seal portion 16 or the second end seal portion 17.

<Opening start means>
The opening start means 20 is a notch. The opening start means 20 is not limited to a notch, and penetrates through a notch (I notch) (see FIG. 4A), a heat generating ink layer 33 (see FIG. 4B) described later, and a base material layer 31 described later. Alternatively, the surface of the base material layer 31 has fine scratches, but many holes (see FIG. 4C) that do not penetrate the sealant layer 32 and many that penetrate from the front surface 11 to the back surface 12. Any of the hole portions (magic cut) (see FIG. 4D) may be used.

  The pouch 10-1 is comprised from the packaging material 30 provided with the base material layer 31 and the sealant layer 32 at least, as FIG. 5 shows. The packaging material 30 shown in FIG. 5 further includes a heat generating ink layer 33, a bonding layer 34, an intermediate layer 35, and a bonding layer 36 that are partially provided between the base material layer 31 and the sealant layer 32. Yes. However, the location of the heat generating ink layer 33 is not limited to between the base material layer 31 and the sealant layer 32. For example, the heat generating ink layer 33 may be disposed on the surface of the base material layer 31 (the surface on the opposite side of the base material layer 31 from the sealant layer 32 side). Further, when the heat generating ink layer 33 is disposed between the base material layer 31 and the sealant layer 32, it is disposed between the base material layer 31 and the joining layer 34 and between the joining layer 34 and the intermediate layer 35. It may be.

<Base material layer>
Since the pouch 10-1 is heated in a microwave oven, the base material layer 31 is preferably made of a material having heat resistance. As the base material layer 31, for example, a stretched polyethylene terephthalate film (stretched PET film), a silica-deposited stretched polyethylene terephthalate film, an alumina-deposited stretched polyethylene terephthalate film, a stretched nylon film, a stretched polypropylene film, or two or more of these films were laminated. A composite film can be used.

  The base material layer 31 is preferably biaxially stretched. Thereby, the molecule | numerator which comprises the base material layer 31 is located in a extending | stretching direction by an extending | stretching process, and the base material layer 31 comes to exhibit the outstanding dimensional stability.

  The thickness of the base material layer 31 can be, for example, 10 μm or more and 30 μm or less. If the thickness of the base material layer 31 is 10 μm or more, the heat resistance required for the pouch 10-1 can be satisfied, and if it is 30 μm or less, the product cost can be suppressed. The thickness of the base material layer 31 shall be obtained as an arithmetic average value of the measured thickness by randomly measuring the thickness at 10 locations from a cross-sectional photograph of the base material layer taken using an optical microscope. In the pouch, the base material layer 31 is disposed outside the sealant layer 32.

<Sealant layer>
The sealant layer 32 is provided in order to seal the accommodation space of the pouch 10-1 by overlapping the two packaging materials 30 and heat-sealing the ends. For this reason, in the pouch 10-1, it arrange | positions so that the sealant layer 32 may become the accommodation space side most.

  As the sealant layer 32, a heat-resistant film made of a polyolefin resin such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-propylene block copolymer, an easy peel film, or the like can be used. The sealant layer 32 may have a single layer structure or a multilayer structure.

  When used in a pouch 10-1 that requires heat resistance, such as a microwave oven pouch, the sealant layer 32 is an unstretched polypropylene layer (CPP layer) mainly containing unstretched polypropylene (CPP), or is mainly linear. A linear low density polyethylene layer (LLDPE layer) containing low density polyethylene (LLDPE) is preferred.

  The thickness of the sealant layer 32 is preferably 20 μm or more and 80 μm or less. If the thickness of the sealant layer 32 is 20 μm or more, it is excellent in impact resistance against dropping that may occur in the distribution process of the pouch 10-1, and if it is 80 μm or less, the increase in cost can be suppressed and the contents can be filled. Excellent ease of handling. The thickness of the sealant layer 32 can be measured by the same method as the thickness of the base material layer 31.

<Junction layer>
As the bonding layers 34 and 36, for example, an adhesive generally used in a known dry lamination method can be used. For example, a polyvinyl acetate adhesive, a polyacrylate adhesive, a cyanoacrylate adhesive Agents, ethylene copolymer adhesives, cellulose adhesives, polyester adhesives, polyamide adhesives, amino resin adhesives, epoxy adhesives, polyurethane adhesives, and the like can be used. The polyurethane-based adhesive is a cured product of a polyol compound and an isocyanate compound.

<Intermediate layer>
The intermediate layer 35 is a layer for supplementing various functions required for a microwave oven pouch. For example, when the pouch 10-1 contains food as contents, the intermediate layer 35 prevents water vapor transmission so that the contents can be preserved while preventing deterioration such as oxidation of the contents. It may have a water vapor barrier property and a gas barrier property that prevents permeation of gas such as oxygen gas. In addition, since the standing type pouch 10-1 is displayed in a stand-alone state on the product shelf of the sales floor, the intermediate layer 35 is provided so that it can sufficiently withstand an impact or the like when the pouch 10-1 falls from the product shelf. May have bending resistance and impact resistance. Further, the intermediate layer 35 may have a function of sufficiently improving the concealment so that the contents of the pouch 10-1 are not visible in order to increase the consumer's willingness to purchase.

  As the intermediate layer 35, for example, a polyolefin film such as polyethylene terephthalate, polyamide, polyethylene, or polypropylene, or a stretched nylon film (ONY film) can be used.

<Exothermic ink layer>
The heat-generating ink layer 33 is a layer that generates heat when heated. Specifically, the heat-generating ink layer 33 forms at least a hole portion that penetrates the base material layer 31 when heated to function as an opening guide portion. Is. For example, when the contents are heated in a microwave oven, the heat generating ink layer 33 absorbs microwaves and generates heat. Thereby, at least the base material layer 31 is melted, and the hole that penetrates the base material layer 31 can be formed in the base material layer 31, so that the opening guide portion can be formed. In the case where not only the base material layer 31 but also the hole that penetrates the sealant layer 32 is formed by the heat generation of the heat generating ink layer 33, the steam in the housing space generated during cooking of the contents can be extracted from the pouch. it can.

  The heat generating ink layer 33 is partially present on each of the packaging materials 30 constituting the front surface 11 and the back surface 12. The exothermic ink layer 33 existing in the packaging material 30 constituting the front surface 11 and the exothermic ink layer 33 existing in the packaging material 30 constituting the rear surface 12 are almost the same when the front surface 11 and the rear surface 12 are overlapped. It is provided so that it may become the same position. The exothermic ink layer 33 shown in FIG. 1 is not in contact with the opening start means 20, but the exothermic ink layer 33 may be in contact with the opening start means 20.

  The heat generating ink layer 33 is linear. The term “linear” in the present specification is a concept including not only a straight line but also a curved line, and a concept including not only a continuous line but also an intermittent line. In FIG. 1, the heat-generating ink layer 33 has a linear shape extending continuously. The width W7 (see FIG. 3) of the heat generating ink layer 33 is preferably 0.5 mm or more and 5 mm or less. If the width W7 of the exothermic ink layer 33 is 0.5 mm or more, it reliably functions as an opening guide part, and if it is 5 mm or less, an increase in cost can be suppressed.

  The heat generating ink layer 33 extends in the horizontal direction DR1. At least one end 33 </ b> A of the heat generating ink layer 33 is located in the seal portion 15. The sealing portion 15 is not easily broken because the two packaging materials overlap each other, but at least one end 33A of the heat-generating ink layer 33 is located in the sealing portion 15 so that the packaging material 30 is removed at the time of opening. Since it breaks easily, it can be opened easily.

  In the pouch 10-1 of FIG. 1, one end 33 </ b> A of the exothermic ink layer 33 is located in the first end seal portion 16, and the other end 33 </ b> B of the exothermic ink layer 33 is located in the second end seal portion 17. ing. That is, one end 33 A of the heat generating ink layer 33 is located on the outer edge 16 A side with respect to the inner edge 16 B of the first end seal portion 16, and the other end 33 B of the heat generating ink layer 33 is the inner edge 17 B of the second end seal portion 17. It is located on the outer edge 17A side. When the one end 33A of the heat generating ink layer 33 is positioned in the first end seal portion 16 and the other end 33B is positioned in the second end seal portion 17 in this way, when opened, FIG. ), The upper portion 10I located on the fourth end portion 10D side of the heat generating ink layer 33 can be cut off.

  When opening, the upper portion 10I may not be cut off. As shown in FIG. 6B, when the upper portion 10I is not cut off, this portion can be used as a shell case or the like. In addition, after eating the contents, it is not necessary to collect the pieces of the pouch separated when the pouch is discarded.

  When the upper portion 10I is not cut off, one end 33A of the heat generating ink layer 33 is positioned in the first end seal portion 16 while the other end 33B is not allowed to reach the inner edge 17B of the second end seal portion 17. To. Specifically, the other end 33 </ b> B of the heat generating ink layer 33 is preferably separated from the inner edge 17 </ b> B of the second end seal portion 17 by 1 mm or more and 3 mm or less.

  In the pouch 10-1 shown in FIG. 1, the ratio (W2 / D) of the width W2 of the gusset folding portion 14 to the distance D from the outer edge 10G of the third end portion 10C to the heat generating ink layer 33 is 0.375 or more. It is preferable that it is less than 1.0. If the above W2 / D is 0.375 or more, the pouch 10-1 can be made stable after opening and the contents can be easily taken out, so the contents can be eaten without being transferred to a plate. Can do. Further, when opening at the position of the gusset folding part 14, it is difficult to open the packaging material 30 because it has to be opened at the position where the four packaging materials 30 overlap, but if the W2 / D is less than 1.0, the packaging material 30 Since it is opened at the position where two sheets overlap, it is easy to open. The distance D may be, for example, 30 mm or more and 200 mm or less.

  The heat generating ink layer 33 contains an organic conductive compound and a resin. The exothermic ink layer 33 may further contain additives such as a coloring material, an inorganic filler, an organic filler, and an antistatic agent. The exothermic ink layer 33 can be formed by applying exothermic ink containing an organic conductive compound and a resin to a desired position and drying it.

(Conductive organic compounds)
Conductive organic compounds include polyanilines, polypyrroles, polythiophenes, polyacetylenes, polyisothianaphthenes, polythienylene vinylenes, polyparaphenylenes, polyphenylene vinylenes, polyfluorenes, polycarbazoles, polyacenes, Polythiazyl, polyethylene vinylene, polyphenylene sulfide, polyperiphthalene, polyacrylonitrile, polyoxadiazole, polyindole, polyazulenes, polyfurans, phthalocyanines and their derivatives, polysilanes, polygermanes, porphyrins And derivatives thereof, graphenes or derivatives thereof, perylene derivatives, tetrathiafulvalene derivatives, sulfur-containing heterocyclic compounds, oxygen-containing heterocyclic compounds, nitrogen-containing heterocyclic compounds, tetra Anokinojimetan derivatives, fullerenes, carbon nanotubes, comprising at least one compound selected from the group consisting of quinones, or dopants in at least one selected from the group preferably contains a compound that has been doped. In order to further increase the dispersibility of the conductive and conductive organic compounds in the resin, the dopant is a functional group such as an alkyl group, a carboxy group, a sulfo group, an alkoxy group, a hydroxy group, or a cyano group. It is for introducing into a conductive organic compound.

  Examples of the polyanilines include polyaniline, poly-2-methylaniline, poly-3-methylaniline, poly-2-ethylaniline, poly-3-ethylaniline, poly-2-methoxyaniline, poly-3-methoxyaniline, poly-2-ethoxyaniline, Poly 3-ethoxyaniline, poly N-methylaniline, poly N-propylaniline, poly N-phenyl-1-naphthylaniline, poly 8-anilino-1-naphthalene sulfonic acid, poly 7-anilino-4-hydroxy-2- And naphthalenesulfonic acid.

  Examples of polypyrrole include polypyrrole, poly 1-methyl pyrrole, poly 3-methyl pyrrole, poly 1-ethyl pyrrole, poly 3-ethyl pyrrole, poly 1-methoxy pyrrole, poly 3-methoxy pyrrole, poly 1-ethoxy pyrrole, poly 1 Examples include 3-ethoxypyrrole. Polythiophenes include polythiophene, polyisothiophene, polyethylenedioxythiophene, polyisonaphthothiophene, polydodecylthiophene, poly-3-methylthiophene, poly-3-hexylthiophene, poly-3-methoxythiophene, poly-3-ethoxythiophene, poly 3-hexylthiophene-2,5-diyl (P3HT), poly-3-octylthiophene-2,5-diyl (P3OT), poly-3-dodecylthiophene-2,5-diyl (P3DDT), poly (3- (2 -Methoxyethoxy) ethoxymethylthiophene-2,5-diyl), poly [(N-dodecyldioxopyrrolothiophene) -alt- (thiophene)] (PDT), poly (3-undeci-2,2'-bithiophene) And poly (4-undec-2,2'-bit Fen), and the like.

  Examples of polyacetylenes include polyacetylene and polydiacetylene. Examples of polyisothianaphthenes include polyisothianaphthene. Examples of polythienylene vinylenes include polythienylene vinylene. Examples of polyparaphenylenes include polyparaphenylene and poly 2,5-dimethoxyparaphenylene. Examples of polyphenylene vinylenes include polyparaphenylene vinylene, poly 2,5-dimethoxyphenylene vinylene, and polynaphthalene vinylene.

  Examples of polyfluorenes include polyfluorene and poly C1-20 alkyl fluorene. Examples of polycarbazoles include polycarbazole. Examples of the polyacenes include naphthacene, pentacene, hexacene, heptacene, dibenzopentacene, tetrabenzopentacene, pyrene, dibenzopyrene, chrysene, perylene, coronene, terylene, obalene, quaterrylene, circumanthracene and derivatives thereof.

  In addition, polythiazyl, polyethylene vinylene, polyphenylene sulfide, polyperinaphthalene, polyacrylonitrile, polyindole such as polyindole, polyazulenes such as polyazulene, polyfurans such as polyfuran and polybenzofuran, phthalocyanine, copper phthalocyanine, Conductive polymer compounds such as zinc phthalocyanine, titanyl phthalocyanine, poly [Fe phthalocyanine (tetrazine)] and derivatives thereof, polysilane compounds, polygermane compounds, porphyrin, tetramethylporphyrin, tetraphenylporphyrin, diazotetrabenz Porphyrin, monoazotetrabenzporphyrin, diazotetrabenzporphyrin, triazotetrabenzporph Porphyrins and derivatives thereof such as phosphorus, octaethylporphyrin, octaalkylthioporphyrazine, octaalkylaminoporphyrazine, hemiporphyrazine, chlorophyll, graphenes or derivatives thereof, perylene derivatives such as bis (benzimidazo) perylene, dibenzotetra Tetrathiafulvalene derivatives such as thiafulvalene, sulfur-containing heterocyclic compounds, oxygen-containing heterocyclic compounds, nitrogen-containing heterocyclic compounds such as carbazole, tetracyanoquinodimethane derivatives, fullerene derivatives, carbon nanotube derivatives, cyanine dyes, Examples thereof include conductive low-molecular compounds such as merocyanine dyes, quinones such as benzoquinone and naphthoquinone.

  The above dopants are halogens, Lewis acids, proton acids, organic carboxylic acids, transition metal halides, electrolyte anions, organic cyano compounds, quinones, alkali metals, alkaline earth metals, amino acids, nucleic acids, surfactants, dyes, It is preferable to include at least one selected from the group consisting of alkylammonium ions and quaternary phosphonium salts.

  Examples of halogens include bromine, iodine, chlorine, iodine chloride, iodine trichloride, iodine bromide, and iodine fluoride. Lewis acids include boron trifluoride, phosphorus pentafluoride, arsenic pentafluoride, sulfur trioxide, antimony pentafluoride, antimony pentachloride, tin tetrabromide, iron tribromide, titanium tetrachloride, aluminum trichloride Etc. Examples of proton acids include hydrogen chloride, sulfuric acid, nitric acid, phosphoric acid, perchloric acid, hydrogen fluoride, polystyrene sulfonic acid (PSS), polyvinyl sulfonic acid (PVS), paratoluene sulfonic acid (PTS), polyacrylamide sulfonic acid, Benzenesulfonic acid, 2-naphthalenesulfonic acid, dinonylnaphthalenesulfonic acid, camphorsulfonic acid (CSA), dodecylbenzenesulfonic acid (DBSA), dinonylnaphthalenedisulfonic acid (DNNDSA), trifluoromethanesulfonic acid, bis-2-ethylhexylsulfosucci Examples include acids, aminobenzenesulfonic acid, polystyrenesulfonic acid, aminotrimethylenephosphonic acid and the like.

  Organic carboxylic acids include formic acid, acetic acid, oxalic acid, benzoic acid, phthalic acid, maleic acid, fumaric acid, malonic acid, tartaric acid, citric acid, lactic acid, succinic acid, sebacic acid, monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, Examples thereof include trifluoroacetic acid, nitroacetic acid, and triphenylacetic acid. Examples of the transition metal halide include ferric chloride, molybdenum pentachloride, iron bromide, and stannic chloride.

  As electrolyte anions, perchlorate anion (ClO4-), hexafluoroarsenate anion (AsF6-), hexafluorophosphate anion (PF6-), tetrafluoroborate anion (PF4-), triflate anion ( CF3SO3-) and the like. Two or more conjugated bonds such as tetracyanoethylene (TCNE), tetracyanoethylene oxide, tetracyanobenzene, 2,3,7,8-tetracyano-1,4,6,9-tetraazanaphthalene (TCNA), etc. Of organic cyano compounds containing cyano groups, chloranil, quinones such as 7,7,8,8-tetracyanoquinodimethane (TCNQ), dichlorodicyanoquinone (DDQ), lithium, sodium, potassium, rubidium, cesium, etc. Alkali earth metals such as alkali metals, beryllium, magnesium and calcium, or amino acids, nucleic acids, surfactants, dyes, alkylammonium ions, quaternary phosphonium salts, and the like can be given.

  When polythiophenes such as polyethylenedioxythiophene (PEDOT) are used as the conductive organic compound, polystyrene sulfonic acid (PSS), polyvinyl sulfonic acid (PVS), paratoluene sulfonic acid (PTS), polyacrylamide sulfonic acid are used as the dopant. A compound having a sulfo group (also referred to as a sulfone group or a sulfonic acid group) in the molecule is preferred. When using polyanilines, as the dopant, camphorsulfonic acid (CSA), dodecylbenzenesulfonic acid (DBSA), dinonylnaphthalenedisulfonic acid (DNNDSA), di-2-ethylhexylsulfosuccinic acid, sodium di-2-ethylhexylsulfosuccinate, Diisooctyl sulfosuccinic acid, sodium diisooctyl sulfosuccinate and the like are preferable. Moreover, the electroconductive polyaniline composition obtained by using together the compound which has a phenolic hydroxyl group in addition to the said sulfonic acid and an inorganic acid is also preferable. In this case, as the compound having a phenolic hydroxyl group, specifically, phenol, 2-, 3-, or 4-cresol, 2-, 3-, or 4-ethylphenol, 2-, 3-, or 4-propylphenol, 2-, 3-, or 4-butylphenol, 2-, 3-, or 4-methoxyphenol, 2-, 3-, or 4-ethoxyphenol, 2-, 3-, or 4-propoxy Phenol, 2-, 3-, or 4-butoxyphenol, 2-, 3-, or 4-nitrophenol, 2-, 3-, or 4-cyanophenol, 2-, 3-, or 4-chlorophenol, Phenol derivatives such as 2-, 3-, or 4-brominated phenols, 2-, 3-, or 4-fluorinated phenols, 2-, 3-, or 4-iodophenols, Substituted phenols such as lithylic acid, hydroxybenzoic acid and hydroxynaphthalene, polyhydric phenolic compounds such as catechol and resorcinol, 4,4′-isopropylidenediphenol (Bis-A), 2-methylenebis (4-methylphenol) Bisphenols such as 4- (2-phenylpropan-2-yl) benzene-1,3diol, 4,4′-dihydroxybiphenol, 4,4′-dihydroxybenzophenone, 4,4′-dihydroxydiphenyl ether, 4, Examples thereof include biphenols such as 4′-dihydroxydiphenylsulfone and polymer compounds such as phenol resin, polyphenol, and poly (hydroxystyrene). In particular, from the viewpoint of heat resistance, it preferably has two aromatic rings, such as 2-, 3-, or 4-hydroxybiphenyl, 2-, 3-, or 4-phenoxyphenol, 1- or 2-naphthol, and the like. It is done. When polypyrroles are used, the dopants include p-toluenesulfonic acid (PTS), 2-naphthalenesulfonic acid, tetrabutylammonium perchlorate, tetraethylammonium perchlorate, tetrabutylammonium tetrafluoroborate, tetrabutyl trifluoromethanesulfonate Ammonium, trifluorosulfonimidotetrabutylammonium, dodecylbenzenesulfonic acid (DBSA) and the like are preferable.

  PEDOT / PSS using polyethylene dioxythiophene (PEDOT) and polystyrene sulfonic acid (PSS) as a dopant is a Clevios series (manufactured by Helios), Verazol series (manufactured by Soken Chemical Co., Ltd.), Aedtron Series (Sigma Aldrich), Denatron Series (Nagase ChemteX Corporation), El Coat Series (Idemitsu Kosan Co., Ltd.), Sepul Gida Series (Shin-Etsu Polymer Co., Ltd.), Olgacon Series (Nippon Agfa) Materials Co., Ltd.), Conisol series (Inscontec Co., Ltd.), 483059, 560596 (both manufactured by Sigma-Aldrich Co.), and the like. Further, PEDOT / PSS disclosed in JP2013-185137A and JP2011-63820A is also useful. PEDOT doped with paratoluenesulfonic acid (PTS) is 649813, 649821, 736295, 736309 (all manufactured by Sigma-Aldrich), PEDOT doped with perchlorate is 736287, 687316, 649805 (all are Sigma-Aldrich) Etc.). PEDOT / PVS can be obtained as VSA-S (manufactured by Asahi Kasei Finechem Corporation). Polyaniline doped with functional sulfonic acid is Panipol series (manufactured by Panipol), polyaniline doped with organic acid is Olmecon series (manufactured by Nissan Chemical Industries, Ltd.), and other polyanilines doped are 428329, 650013, 561126, 561134 (both manufactured by Sigma-Aldrich) and the like. Doped polypyrrole is available as 735817, 578177, 577030, 530573, 577065, 482552 (all manufactured by Sigma-Aldrich), CDP-310M (manufactured by Nippon Carlit). Further, polypyrrole fine particles comprising pyrrole and / or a pyrrole derivative nano-dispersed in an organic solvent disclosed in Japanese Patent Application Laid-Open No. 2005-314538 and 2008-231381 are disclosed in Japanese Patent Application Laid-Open No. 2010-163396. Polypyrrole or polythiophene doped with a quaternary phosphonium salt, a compound having a sulfo group in the molecule disclosed in JP-A-2014-31433, or a thiophene-pyrrole conductive polymer composite doped with perchloric acid In addition to the sulfonic acid and inorganic acid disclosed in Japanese Patent Application Publication No. 2009-84418, a conductive polyaniline composition obtained by using a compound having a phenolic hydroxyl group is also useful.

  In addition, a self-doped conductive polymer compound in which the conductive polymer itself such as poly-3-alkylsulfonic acid thiophene or poly-3-alkylthiophene has a doping effect may be used. As these self-doped conductive polymer compounds, poly-3-hexylthiophene-2,5-diyl (P3HT) is 445703, 69889, 698997 (all manufactured by Sigma-Aldrich), poly-3-octylthiophene-2,5 -Diyl (P3OT) is available as 682799 (Sigma-Aldrich), poly-3-dodecylthiophene-2,5-diyl (P3DDT) is available as 682780 (Sigma-Aldrich).

(resin)
If resin does not inhibit exothermic property, it can select suitably according to a base material layer, a use, a structure, etc. Specifically, for example, shellacs, rosins, rosin-modified maleic resin, rosin-modified phenol resin, nitrified cotton, cellulose acetate, cellulose acetylpropionate, cellulose acetylbutyrate, chlorinated rubber, cyclized rubber, polyamide resin, Vinyl chloride-vinyl acetate copolymer, polyester resin, polyvinylidene chloride resin, ketone resin, butyral resin, chlorinated polypropylene resin, chlorinated polyethylene resin, chlorinated ethylene vinyl acetate resin, ethylene vinyl acetate resin, acrylic resin, urethane resin Styrene maleic acid resin, casein, alkyd resin, acrylic emulsion, urethane emulsion, polyvinyl alcohol resin, ethylene-vinyl alcohol resin, and the like.

Specific examples of the packaging material 30 include the following packaging materials. Note that “/” is used as a notation indicating a boundary between layers when listing layers. The layers are described from the outside to the inside of the pouch. That is, the layer described on the rightmost side is a sealant layer. The following AD layer means a bonding layer.
Stretched PET film / heat generation ink layer / AD layer / ONY film / AD layer / CPP layer heat generation ink layer / stretched PET film / AD layer / ONY film / AD layer / CPP layer stretched PET film / AD layer / heat generation ink layer / ONY Film / AD layer / CPP layer stretched PET film / heat generation ink layer / AD layer / CPP film

<< Other pouches >>
The pouch 10-1 shown in FIG. 1 is formed using a single packaging material, but the pouch may be a pouch formed using two or more packaging materials. The pouch 10-2 shown in FIG. 7 is composed of two packaging materials, a body film 41 and a bottom film 42. In FIG. 7, members denoted by the same reference numerals as those in FIG. 1 and the like are the same as those shown in FIG.

  The body film 41 is formed using the packaging material 30, and the bottom film 42 is formed using the packaging material obtained by removing the heat generating ink layer 33 from the packaging material 30. The bottom film 42 is sealed with the body film 41 at the third end 40C on the front surface 11 side and the back surface 12 side. Accordingly, the third end seal portion 18 exists on the front surface 11 side and the back surface 12 side.

  A plurality of unsealed portions 10J that are not heat-sealed are formed on the third end portion 10C. By providing the unsealed portion 10J, bubbling or curling of the third end portion 10C during heat sealing can be prevented.

<< Pouch Manufacturing Method >>
Such a pouch 10-1 can be manufactured as follows. Below, the example which manufactures several pouch 10-1 continuously is shown.

  First, a packaging material 30 wound in a roll shape is prepared. As shown in FIG. 8A, the packaging material 30 has two heat-generating ink layers 33 formed in a linear shape along the flow direction of the packaging material at predetermined positions on the packaging material 30 at predetermined intervals. Is. The left heat generating ink layer 33 shown in FIG. 8A becomes the heat generating ink layer 33 on the front surface 11 side of the pouch 10-1, and the right heat generating ink layer 33 generates heat on the back surface 12 side of the pouch 10-1. The ink layer 33 is formed.

  Next, the sheet is folded to the outside at a width half the width of one end extending in the flow direction of the packaging material 30 and the two packaging materials overlap each other at a predetermined size. Punch out. Thereafter, the portion where the two packaging materials overlap is folded inside. And it folds in half in the state which match | combined the both ends of the packaging material 30. FIG. In this state, both ends of the packaging material 30 are heat-sealed along the flow direction of the packaging material 30, and the third end extending along the flow direction of the packaging material 30 as shown in FIG. The part seal part 18 is formed and the gusset folding part 14 is formed.

  After the third end seal portion 18 is formed, the second end seal portion 17 and the fold seal portion 19 are heat sealed as shown in FIG. The part seal part 17 and the folding seal part 19 are formed. The second end seal portion 17 is formed together with the first end seal portion 16 of the adjacent pouch formed on the downstream side, and is connected to the first end seal portion 16.

  Then, after the opening start means 20 is formed at a position on the extended line of the heat generating ink layer 33 in the second end seal portion 17, as shown in FIG. 9B, at the position where the opening start means 20 is formed. Next, the packaging material 30 is cut in a direction orthogonal to the flow direction of the packaging material 30 and separated from the adjacent downstream pouch 10-1.

  After being separated from the adjacent downstream pouch 10-1, the portion that becomes the first end seal portion 16 is not sealed and is an opening, so that as shown in FIG. The contents are filled into the packaging material 30 in the form of a bag from the opening. And the part used as the 1st edge part seal part 16 is heat-sealed, and the 1st edge part seal part 16 is formed as FIG.10 (B) shows. The first end seal portion 16 is formed together with the second end seal portion 17 of the pouch 10-1 formed on the adjacent upstream side, and is connected to the second end seal portion 17.

  Thereafter, the opening start means 20 is formed at a position on the extended line of the heat generating ink layer 33 in the first end seal portion 16, and then the position at which the opening start means 20 is formed is shown in FIG. In this way, the packaging material 30 is cut in a direction orthogonal to the flow direction of the packaging material 30 and separated from the adjacent upstream packaging material 30. Thereby, the pouch 10-1 shown by FIG. 1 is obtained.

  According to this embodiment, since the packaging material 30 includes the heat generating ink layer 33, the heat generating ink layer 33 generates heat when heated, and at least the hole that penetrates the base material layer 31 through the base material layer 31. Can be formed. Thereby, when heated, an opening guide part can be formed.

[Second Embodiment]
Hereinafter, a pouch according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 11 is a front view of the pouch according to the present embodiment, and FIG. 12 is a plan view for explaining dimensions of each component of the pouch shown in FIG. 11 and 12, members denoted by the same reference numerals as those in FIGS. 1 and 3 are the same as the members shown in FIGS.

  A pouch 10-3 shown in FIG. 11 is a pouch having gusset folding portions on both sides. Specifically, in addition to the gusset folding portion 14 provided on the third end portion 10C side, a gusset folding portion 51 is provided on the fourth end portion 10D side. By providing the gusset folding parts 14 and 51 on both sides of the pouch 10-3, the accommodation space can be further increased, so that a larger content can be accommodated. The gusset folding part 51 is formed by folding the upper surface 52 in half.

<Guset insert part>
The ratio (W2 / H1) of the width W2 (see FIG. 12) of the gusset folding part 14 to the height H1 of the pouch 10-3 is preferably 0.1 or more and 0.5 or less. If the above-mentioned W2 / H1 is 0.1 or more, the pouch 10-3 can be stably made independent when the pouch 10-3 is made independent. Moreover, if W2 / H1 is 0.5 or less, more contents can be accommodated. When the width of the gusset folding part is not constant, the width of the gusset folding part is the shortest value. The width W2 of the gusset folding part 14 and the width W8 (see FIG. 12) of the gusset folding part 51 may be 20 mm or more and 50 mm or less.

  The heat generating ink layer 33 is located closer to the gusset folding part 14 than the gusset folding part 51. In this case, the ratio (W / D) of the width W2 of the gusset folding part 14 to the distance D from the outer edge 10G of the third end 10C to the heat generating ink layer 33 is 0.33 or more and less than 1.0. Is preferred. If the above W / D is 0.33 or more, the pouch 10-3 can be made stable and stable after opening and the contents can be easily taken out, so the contents can be eaten without being transferred to a plate. Can do. Further, when opening at the position of the gusset folding part 14, it is difficult to open the packaging material because it has to be opened at the position where the four packaging materials overlap, but if the W / D is less than 1.0, the packaging material is 2 It is easy to open because it will be opened at the overlapping position. The distance D may be, for example, 10 mm to 150 mm, and the width W2 may be, for example, 20 mm to 50 mm.

  Also in this embodiment, since the packaging material 30 includes the heat generating ink layer 33, the heat generating ink layer 33 generates heat when heated, and at least a hole that penetrates the base material layer 31 is formed in the base material layer 31. Can be formed. Thereby, when heated, an opening guide part can be formed.

[Third Embodiment]
Hereinafter, a pouch according to a third embodiment of the present invention will be described with reference to the drawings. FIG. 13 is a front view of the pouch according to the present embodiment.

  The pouch 10-4 shown in FIG. 13 is a pillow pouch. The pouch 10-4 has a front surface 61, a back surface 62, and a side surface 63. The front surface 61 and the back surface 62 have a rectangular outline. The pouch 10-4 includes a first end portion 10A, a second end portion 10B opposite to the first end portion 10A, and a third end portion 10C extending between the first end portion 10A and the second end portion 10B. And a fourth end portion 10D and a palm portion 10K formed from the first end portion 10A to the second end portion 10B. The fourth end 10D is an end opposite to the third end 10C.

  As shown in FIG. 13, a gusset folding portion 14 is provided on the third end 10 </ b> C side of the pouch 10-4. In addition, the gusset folding part similar to the gusset folding part 14 is formed also in the 4th edge part 10D side of the pouch 10-3.

<Guset insert part>
The gusset folding part 14 is formed by folding the side surface 63 in half. Since the accommodation space can be increased by providing the gusset folding portion 14 at the third end portion 10C, a larger content can be accommodated. The gusset folding part 14 is formed along the direction in which the palm seal part 65 extends.

  The pouch 10-4 includes a seal portion 64 for sealing the pouch 10-4. As shown in FIG. 13, the seal portion 64 includes a first end seal portion 16 formed on the first end portion 10A, a second end seal portion 17 formed on the second end portion 10B, and a first end portion. And a palm seal portion 65 formed from the end seal portion 16 to the second end seal portion 17. The joint seal part 65 is provided in the joint part 10K.

  As shown in FIG. 13, the joint seal portion 65 is provided with an opening start means 20 that can be a starting point for opening. Further, the pouch 10-4 is formed by using the packaging material 30 including the heat generating ink layer 33.

<Exothermic ink layer>
The heat-generating ink layer 33 is formed in a linear shape, but in FIG. 13, the heat-generating ink layer 33 is formed in a continuously extending curved shape. Specifically, the heat generating ink layer 33 is formed in a substantially elliptical shape.

  At least one end 33A of the heat generating ink layer 33 is preferably located in the seal portion 64 for the same reason as in the first embodiment. In the pouch 10-4, one end 33 </ b> A of the heat generating ink layer 33 is located in the joint seal portion 65. The exothermic ink layer 33 shown in FIG. 13 is not in contact with the unsealing start means 20, but the exothermic ink layer 33 may be in contact with the unsealing start means 20.

  Also in this embodiment, since the packaging material 30 includes the heat generating ink layer 33, the heat generating ink layer 33 generates heat when heated, and at least a hole that penetrates the base material layer 31 is formed in the base material layer 31. Can be formed. Thereby, when heated, an opening guide part can be formed.

[Fourth Embodiment]
Hereinafter, a pouch according to a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 14 is a front view of the pouch according to the present embodiment, and FIG. 15 is a plan view for explaining the dimensions of each component of the pouch shown in FIG. In FIG. 14, members denoted by the same reference numerals as those in FIG. 1 are the same as the members shown in FIG.

  The pouch 10-5 shown in FIG. 14 is a tetrahedral (tetra-type) pouch. The pouch 10-5 has three side surfaces 71 and a bottom surface 72, as shown in FIG. The side surface 71 and the bottom surface 72 have a triangular outline. The pouch 10-5 includes a first end portion 10A, a second end portion 10B in a twisted relationship with the first end portion 10A, and a palm portion formed across the first end portion 10A and the second end portion 10B. 10K.

  The pouch 10-5 includes a seal portion 73 for sealing the pouch 10-1. As shown in FIG. 14, the seal portion 73 includes a first end seal portion 16 formed at the first end portion 10A, a second end seal portion 17 formed at the second end portion 10B, and a first end portion. And a palm seal portion 74 formed from the end seal portion 16 to the second end seal portion 17. The palm seal portion 74 is provided in the palm portion 10K as shown in FIG.

  As shown in FIG. 14, the second end seal portion 17 is provided with an opening start means 20 that can be a starting point for opening. Further, the pouch 10-5 is formed by using the packaging material 30 including the heat generating ink layer 33.

<Exothermic ink layer>
The heat-generating ink layer 33 is formed in a linear shape, but in FIG. 14, the heat-generating ink layer 33 is formed in a linear shape that extends continuously.

  At least one end 33A of the heat generating ink layer 33 is preferably located in the seal portion 73 for the same reason as in the first embodiment. In the pouch 10-5 of FIG. 14, one end of the heat generating ink layer is located in the second end seal portion.

  At least one end 33A of the heat generating ink layer 33 is preferably located in the seal portion 73 for the same reason as in the first embodiment. In the pouch 10-5, one end 33 </ b> A of the heat generating ink layer 33 is located in the second end seal portion 17. The other end of the heat generating ink layer 33 is also located in the second end seal portion 17. The exothermic ink layer 33 shown in FIG. 14 is not in contact with the unsealing start means 20, but the exothermic ink layer 33 may be in contact with the unsealing start means 20.

  The ratio (H2 / H1) of the height from the bottom surface 72 to the heat-generating ink layer 33 with respect to the height H1 of the pouch 10-5 is preferably 0.33 or more and less than 0.6. If the above-mentioned H2 / H1 is 0.33 or more, the position of the opening formed by opening is not too low, the contents are not easily spilled, and the contents can be eaten without being transferred to a plate. Moreover, if said H2 / H1 is less than 0.6, an opening part is not too small and the content is easy to take out. In addition, the said height H1 may be 100 mm or more and 150 mm or less, for example, and the said height H2 may be 30 mm or more and 100 mm or less, for example.

  Also in this embodiment, since the packaging material 30 includes the heat generating ink layer 33, the heat generating ink layer 33 generates heat when heated, and at least a hole that penetrates the base material layer 31 is formed in the base material layer 31. Can be formed. Thereby, when heated, an opening guide part can be formed.

  In order to describe the present invention in detail, examples will be described below, but the present invention is not limited to these descriptions.

<Example 1>
In Example 1, the pouch shown in FIG. 1 was produced. Specifically, first, a packaging material having a width of 360 mm wound in a roll shape was prepared.

  The packaging material is a base layer composed of a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm, a joining layer composed of a polyurethane adhesive having a thickness of 3 μm, an intermediate layer composed of a stretched nylon film having a thickness of 15 μm, and a polyurethane having a thickness of 3 μm. A joining layer made of a system adhesive and a 50 μm thick sealant layer made of an unstretched polypropylene film were provided in this order. In the packaging material, a heat-generating ink layer having a width of 1 mm was formed in a linear shape continuously extending in a region where an opening guide portion between the base material layer and the bonding layer was formed. The exothermic ink layer was formed by applying exothermic ink to the back surface of the base material layer and drying it. As the exothermic ink, an ink containing LG-MW heat agent (F) and LG-MW additive (A) manufactured by Tokyo Ink Co., Ltd. was used.

  Next, it is folded outward at half the width of the width of one end extending in the flow direction of the packaging material, and two pieces of the packaging material are overlapped in a circular shape with a diameter of 13 mm. Punched out. Thereafter, the portion where the two packaging materials overlap each other was folded inward, and folded in two with both ends of the packaging material being combined. In this state, both ends of the packaging material are heat-sealed along the flow direction of the packaging material to form a third end seal portion extending along the flow direction of the packaging material, and a gusset folding portion is formed on one side did.

  After forming the gusset folding portion, the second end seal portion and the folding seal portion were heat sealed to form the second end seal portion and the folding seal portion. The second end seal portion was formed together with the first end seal portion of the adjacent pouch formed on the downstream side, and was connected to the first end seal portion 15.

  Thereafter, a notch that is an opening start means is formed at a position on the extended line of the heat generating ink layer in the second end seal portion, and the packaging material 30 is formed in a direction perpendicular to the flow direction of the packaging material at the position where the notch is formed. Was cut from the adjacent downstream pouch.

  After separating from the adjacent downstream pouch, 5 pieces (140 g) of frozen takoyaki as contents were filled from the opening serving as the first end seal portion. And the part used as a 1st edge part seal part was heat-sealed, and the 1st edge part seal part was formed. In addition, the 1st end part seal part was formed with the 2nd end part seal part of the pouch formed in the adjacent upstream, and was connected with this 2nd end part seal part.

  After that, a notch as opening opening means is formed at a position on the extended line of the heat generating ink layer in the first end seal portion, and is formed in a direction perpendicular to the flow direction of the packaging material at the position where the notch is formed. The pouch was cut and separated from the pouch formed on the adjacent upstream side. As a result, a pouch having the same structure as the pouch shown in FIG. 1 was produced. The produced pouch had a height H of 140 mm and a width W1 of 165 mm. In the manufactured pouch, the width W2 of the gusset folding part is 40 mm, and the widths W3 to W5 of the first end seal part to the third end seal part of the pouch are 10 mm, respectively. The width W6 was 10 mm. One end of the heat generating ink layer was located in the first end seal portion, and the other end was located in the second end seal portion. The distance D from the outer edge of the second end to the heat generating ink layer was 5 mm. The dimensions of H1, W1 to W6, D, etc. were as shown in FIG.

  And when the obtained pouch was put in a microwave oven (model number “RE-TS3”, manufactured by SHARP Co., Ltd.) in a self-supporting state and heated at 600 W for 3 minutes, an exothermic ink layer was formed during heating. Vapor escaped from the part. Then, after heating, take out the pouch from the microwave oven, place it on the table so that the gusset folding part is on the lower side, and open the pouch from the notch. I was able to eat takoyaki. The reason why the steam escaped from the portion where the heat-generating ink layer was formed during heating could be opened along the heat-generating ink layer because the heat-generating ink layer formed a through-hole in the packaging material.

<Example 2>
In Example 2, a pouch was obtained in the same manner as in Example 1 except that 40 g of squid was filled as the contents. Then, when the pouch according to Example 2 was put in a microwave oven (model number “RE-TS3”, manufactured by SHARP Co., Ltd.) in a self-supporting state and heated at 600 W for 30 seconds, the squid sky had little moisture. Therefore, no steam was generated during heating. Then, after heating, take out the pouch from the microwave oven, place it on the table so that the gusset folding part is on the lower side, and open the pouch from the notch. I was able to eat heaven. The reason why the opening could be made along the heat generating ink layer was that through holes were formed in the packaging material by the heat generating ink layer.

10-1 to 10-5 ... pouch 10A ... first end 10B ... second end 10C ... third end 10D ... fourth end 10E-10H ... outer edge 11 ... front surface 12 ... back surface 13 ... bottom surface 14 ... Gusset folding part 15 ... Seal part 16 ... First end seal part 17 ... Second end seal part 18 ... Third end seal part 20 ... Opening start means 30 ... Packaging material 31 ... Base material layer 32 ... Sealant Layer 33 ... exothermic ink layer

Claims (5)

A pouch formed using a packaging material having at least a base material layer and a sealant layer,
A seal portion for sealing the pouch;
The packaging material further comprises a heat-generating ink layer partially provided;
The pouch, wherein the heat-generating ink layer is formed so as to form a hole that penetrates at least the base material layer of the packaging material and functions as an opening guide when heated.   The pouch according to claim 1, wherein one end of the heat-generating ink layer is located in the seal portion.   The pouch includes a first end portion and a second end portion opposite to the first end portion, and the seal portion includes a first end seal portion formed at the first end portion, and the second end portion. A second end seal portion formed at an end, wherein one end of the heat generating ink layer is located in the first end seal portion, and the other end of the heat generating ink layer is the second end seal. The pouch according to claim 1, which is located in the section.   The pouch according to any one of claims 1 to 3, wherein the heat-generating ink layer is linear.   The pouch according to any one of claims 1 to 4, which is a pouch for chilled foods or frozen foods.

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