JP2022120631A - Steam-permeable pouch - Google Patents

Abstract

To provide a steam-permeable pouch that allows steam to suitably pass through when heated.SOLUTION: A steam-permeable pouch 10 has: a pouch body 11 that is made up of a sheet 20 of a layered structure including a paper layer and a sealant layer and includes a storage space S; and a projection 12 projecting from the pouch body 11. The projection 12 has a steam-permeable part 50 to open when the storage space S shows a pressure increase. In a predetermined first region including at least a portion of the steam-permeable part 50, the layered structure of the sheet 20 includes a heat peeling layer to be laminated on the paper layer.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to pervaporized pouches.

Pouches are known which are composed of sheets having a plurality of layers. At least one of the layers may be provided with a paper layer made of paper. Patent Literature 1 discloses an example of a pouch configuration including a paper layer.

JP 2016-108024 A

In the pouch as described above, when the contents require heat treatment, a steam vent is provided for discharging the water vapor generated by the heating. However, paper has a lower coefficient of thermal expansion than a layer made of resin, which is a material that constitutes a general pouch. For this reason, there is a possibility that suitable steam cannot be passed through the portion where the steam passing portion is formed.

The vapour-type pouch of the present disclosure is composed of a sheet having a layered structure including a paper layer and a sealant layer, and includes a pouch body having a housing space, and a protrusion configured to protrude from the pouch body. The ventilating pouch, wherein the protruding portion includes a ventilating portion that opens when the pressure in the housing space increases, and the sheet is provided with the ventilating portion in a first predetermined region including at least a portion of the ventilating portion. The layer structure includes a thermal release layer laminated to the paper layer.

According to the steaming type pouch, suitable steaming is carried out during heating.

FIG. 2 is a front view of the pervaporization pouch of the embodiment; FIG. 2 is a schematic cross-sectional view showing a layered structure of a sheet that constitutes the vapor-steaming pouch of FIG. 1; FIG. 4 is a front view showing an example of the position of the pervaporized pouch in which the first predetermined area is provided. FIG. 4 is a front view showing an example of the position of the pervaporized pouch in which the first predetermined area is provided. FIG. 4 is a front view showing an example of the position of the pervaporized pouch in which the first predetermined area is provided. FIG. 4 is a schematic cross-sectional view showing a state of a portion including a vaporizing portion of the vaporizing pouch during heating. FIG. 4 is a schematic cross-sectional view showing a state of a portion including a vaporizing portion of the vaporizing pouch during heating. FIG. 4 is a schematic cross-sectional view showing a layered structure of a sheet that constitutes a vapor-steaming pouch of a modification.

(An example of a form that a steamable pouch can take)
(1) The steamable pouch according to the present invention is composed of a sheet having a layered structure including a paper layer and a sealant layer, a pouch body having a housing space, and a protrusion configured to protrude from the pouch body. , wherein the protruding portion includes a vapor passage portion that opens when the pressure in the housing space increases, and in a first predetermined region including at least a portion of the vapor passage portion, the The layered structure of the sheet includes a thermal release layer laminated to the paper layer.
According to the steam-vapor-type pouch, the heat release layer is laminated on the paper layer in the first predetermined region including the steam-vapor portion. A gap is formed between the paper layer and the other layer by forming the thermal release layer. This gap allows the vapor passage portion to open as the pressure in the housing space increases. Therefore, suitable steaming is carried out during heating.

(2) According to one example of the steam-vapor pouch, the sheet includes a first sheet and a second sheet, and the thermal release layer is provided on at least one of the first sheet and the second sheet.
According to the steaming type pouch, suitable steaming is carried out during heating.

(3) According to one example of the steam-vapor pouch, the layer structure includes an intermediate layer provided between the paper layer and the sealant layer, and the heat release layer comprises the paper layer and the intermediate layer. provided between
According to the vapor-vapor-type pouch, since the intermediate layer is provided, the usability of the vapor-vapor-type pouch is improved.

(4) According to one example of the vapor-permeable pouch, the vapor-permeable portion includes a vapor-permeable seal portion and a notch.
According to the steaming type pouch, suitable steaming is carried out through the slits.

(5) According to one example of the steam-vapor pouch, the pouch further includes a second predetermined region where the thermal release layer is not formed.
According to the vapor-passage pouch, since the second predetermined region is not formed with the heat release layer, complete separation of the paper layer and other layers of the layered structure is suppressed.

<Embodiment>
A vapour-type pouch 10 according to an embodiment will be described with reference to FIGS. 1 to 7. FIG. FIG. 1 shows a steamable pouch 10 containing a content C. FIG. The content C is an object to be heated that generates steam when heated. An example of the content C is fluid food. Vapor-type pouch 10 is configured to be heatable while containing contents. Vapor-type pouch 10 is configured so that steam generated from content C can be discharged. Vapor-type pouch 10 is configured so that it can be stored for a long period of time while suppressing intrusion of air and microorganisms from the outside and maintaining the quality of contents C. Vapor-type pouch 10 may take various forms. Examples of shapes that the steamable pouch 10 can take are a flat bag type, a standing type, a gusset type, and a pillar type. The shape of the steamable pouch 10 illustrated in FIG. 1 is a flat bag type. Hereinafter, the left-right direction of the vapour-producing pouch 10 when viewed from the front may be referred to as a standard width direction XA, and the direction orthogonal to the standard width direction XA may be referred to as a standard height direction XB.

Vapor-type pouch 10 includes pouch body 11 and protrusion 12 . The pouch body 11 is a part that constitutes a main part of the storage space S. As shown in FIG. The protrusion 12 is configured to protrude from the pouch body 11 . The protrusion 12 protrudes in a direction perpendicular to the standard width direction XA and the standard height direction XB.

The length of the pouch body 11 in the standard width direction XA is preferably determined from the relationship between the amount of the contents C to be accommodated and the portability of the vapor-steaming pouch 10 . In one example, the length of the pouch body 11 in the standard width direction XA is within the range of 140-170 mm. In one example, the length of the standard width direction XA of the pouch body 11 is 152 mm.

The length of the pouch body 11 in the standard height direction XB is preferably determined from the relationship between the amount of the content C to be accommodated and the portability of the pervaporization pouch 10 . According to one example, the length of the pouch body 11 in the standard height direction XB is in the range of 140-170 mm. In one example, the length of the pouch body 11 in the standard height direction XB is 158 mm.

Projection 12 includes a first portion 12A and a second portion 12B. 12 A of 1st parts are comprised so that the accommodation space S may be continued. The second portion 12B is not continuous with the storage space S in the state where the contents C are stored in the pervaporizable pouch 10 . The second portion 12B may be configured to be continuous with the external space.

The main elements that make up the vapor-permeable pouch 10 are the sheet 20 that makes up the pouch body 11 and the projecting portion 12, the seal portion 40 that seals the sheet 20 to form the storage space S, and the storage space S. It is a vapor passage section 50 for releasing the steam generated outside.

In one example, the seat 20 is composed of a plurality of sheets. Sheet 20 includes a first sheet 21 and a second sheet 22 . A housing space S is formed between the first sheet 21 and the second sheet 22 by providing the first sheet 21 and the second sheet 22 so as to face each other. The projecting portion 12 is formed by folding at least one of the first sheet 21 and the second sheet 22 . In another example, the sheet 20 consists of one sheet. A storage space S is formed by folding one sheet 20 . The projecting portion 12 is formed on at least one of the first sheet 21 and the second sheet 22 . In this embodiment, the protrusion 12 is formed on the first sheet 21 .

The seal portion 40 seals the first sheet 21 and the second sheet 22 so that they are not separated. The sealing portion 40 forms an accommodation space S to distinguish the vapour-type pouch 10 from the outside. The seal portion 40 is formed, for example, by heat-sealing a portion of the sealant layer 33 of the first sheet 21 and a portion of the sealant layer 33 of the second sheet 22 . The seat 20 includes a seal portion 40 and a portion surrounded by the seal portion 40 (hereinafter “inner portion 23”).

The seal portion 40 includes an upper seal portion 41 , a lower seal portion 42 , a first side seal portion 43 and a second side seal portion 44 . The upper seal portion 41 is provided above the inner portion 23 in the standard height direction XB. The lower seal portion 42 is provided below the inner portion 23 in the standard height direction XB. The first side seal portion 43 is provided on either the right side or the left side of the inner portion 23 in the standard width direction XA. The second side seal portion 44 is provided on the other of the left side and the right side of the inner portion 23 in the standard width direction XA.

An inner edge 41A that is the edge of the upper seal portion 41 on the inner portion 23 side, an inner edge 42A that is the edge of the lower seal portion 42 on the inner portion 23 side, and an edge of the first side seal portion 43 on the inner portion 23 side. An inner edge 43A and an inner edge 44A, which is the edge of the second side seal portion 44 on the inner portion 23 side, define the inner contour of the inner portion 23. As shown in FIG. An outer edge 41B opposite to the inner edge 41A in the upper seal portion 41, an outer edge 42B opposite to the inner edge 42A in the lower seal portion 42, and an opposite edge to the inner edge 43A in the first side seal portion 43. and an outer edge 44B opposite to the inner edge 44A of the second side seal portion 44 define the outline of the vapor-sealing pouch 10. As shown in FIG.

The width of each seal portion 41 to 44 can be arbitrarily selected. The width of each seal portion 41-44 is the length between the inner edge 41A-44A and the outer edge 41B-44B normal to the center line of each seal portion 41-44. The center line of each seal portion 41-44 is an imaginary line segment passing between the inner edges 41A-44A and the outer edges 41B-44B. When the width of each seal portion 41 to 44 differs for each portion, for example, the maximum width or the average width of a plurality of portions in each seal portion 41 to 44 represents the width of the seal portion.

The vapor passage part 50 is configured to be opened as the pressure in the storage space S rises, so that the steam in the storage space S can be discharged to the outside of the permeable pouch 10 . In a preferred example, the ventilation part 50 is configured to open when the pressure in the accommodation space S rises to a pressure within a predetermined pressure range. The location in the vapor-permeable pouch 10 where the vapor-permeable portion 50 is provided can be arbitrarily selected. The location in the vapor-permeable pouch 10 where the vapor-permeable portion 50 is provided can be arbitrarily selected. In the first example, the vapor passage portion 50 is provided in the projecting portion 12 . In a second example, the vapor passage portion 50 is provided in the first side seal portion 43 or the second side seal portion 44 . In the third example, the vapor passage portion 50 is provided in the first side seal portion 43 and the second side seal portion 44 . The steamable pouch 10 of the present embodiment is a first example.

The vaporization portion 50 includes a vaporization seal portion 51 and one or more cuts 52 . In the present embodiment, the vaporization seal portion 51 includes a first vaporization seal portion 51A, a second vaporization seal portion 51B, a third vaporization seal portion 51C, a fourth vaporization seal portion 51D, and a fifth vaporization seal portion. 51E, a sixth vapor seal portion 51F, and a seventh vapor seal portion 51G. At least one of the vapor-permeable seal portions 51A to 51G constituting the vapor-permeable seal portion 51 is configured to have a lower seal strength than the seal portion 40. As shown in FIG. Alternatively, at least one of the ventilation seal portions 51A to 51G forming the ventilation seal portion 51 is configured to have a narrower seal width than the seal portion 40. As shown in FIG. The first portion 12A and the second portion 12B of the protruding portion 12 are partitioned by the vapor-passing seal portions 51A to 51G.

A plurality of cuts 52 are provided in the second portion 12B. Incision 52 may take a variety of forms. According to a first example, the incisions 52 are holes through the sheet 20 . According to a second example, the incisions 52 are holes that do not pass through the sheet 20 . In the case of the second example, the depth of the cut 52 is such that the portion where the cut 52 is formed is broken when the pressure in the housing space S rises and the steam permeable seal portion 51 is peeled off. Preferably. The cut 52 may include multiple cuts 52 . In this embodiment, the cut 52 includes a first cut 52A, a second cut 52B, and a third cut 52C along the standard width direction XA. At least one of the cuts 52A to 52C may have a different shape, or they may all have the same shape.

As shown in FIG. 2, the sheet 20 comprises a layer structure 30 in which multiple layers are laminated. The layer structure 30 of the sheet 20 may be the same or different between the first sheet 21 and the second sheet 22 . In this embodiment, the first sheet 21 and the second sheet 22 have different layer structures 30 . The sheet 20 forming the pouch body 11 and the sheet 20 forming the projecting portion 12 may have the same layer structure 30 or may have different layers. A plurality of layers forming the sheet 20 are laminated by dry lamination, for example.

The layer structure 30 may have any configuration in consideration of strength, heat resistance, water resistance, gas barrier properties, etc., depending on the use of the vapor-permeable pouch 10 . Layered structure 30 includes at least a base layer 31 and a sealant layer 33 . In this embodiment, the layered structure 30 includes a base layer 31 , an intermediate layer 32 and a sealant layer 33 .

The base material layer 31 has a main surface provided along the stacking direction of the layer structure 30 . The major surfaces include a first major surface 31A and a second major surface 31B. A material constituting the base material layer 31 is composed of an arbitrary material. In one example, the base material layer 31 is a paper layer made of paper. The paper layer is composed of recycled or non-recycled paper. Preferably, the paper layer is composed of non-recycled paper. The basis weight of the paper constituting the paper layer is, for example, 30 g/m ² or more. Preferably, the basis weight of the paper constituting the paper layer is 50 g/m ² or more. In one example, the basis weight of the paper forming the paper layer is less than 200 g/m ² . Preferably, the basis weight of the paper making up the paper layer is less than 120 g/m ² .

The intermediate layer 32 has a main surface provided along the stacking direction of the layer structure 30 . The major surfaces include a first major surface 32A and a second major surface 32B. The material forming the intermediate layer 32 is an arbitrary material. In one example, the material that constitutes the intermediate layer 32 is at least one of polyethylene terephthalate, polypropylene, polyester, and polyamide deposited with an inorganic thin film such as aluminum oxide or silicon oxide. Another example is nylon. Intermediate layer 32 may be composed of more than one material. Preferably, the thickness of the intermediate layer 32 in the stacking direction is within the range of 5 to 30 μm. The thickness of the intermediate layer 32 in the stacking direction may be changed according to the material forming the intermediate layer 32 .

The sealant layer 33 has a main surface provided along the stacking direction of the layer structure 30 . The major surfaces of the sealant layer 33 include a first major surface 33A and a second major surface 33B. The material forming the sealant layer 33 is a thermoplastic resin. Thermoplastic resins are, for example, polyethylene and polypropylene. Preferably, the thermoplastic resin is block polypropylene, which includes polyethylene within polypropylene. The thickness of the sealant layer 33 in the stacking direction is preferably within the range of 30 to 80 μm. More preferably, it is in the range of 40-60 μm.

An adhesive layer 34 is formed between each layer. The adhesive layer 34 is constructed by any adhesive means. In one example, the adhesive layer 34 is composed of an adhesive such as a two-component curable urethane resin. In another example, the adhesive layer 34 is made of a heat-sealable resin. The adhesive layer 34 includes a first adhesive layer 34A provided between the base material layer 31 and the intermediate layer 32 . The first adhesive layer 34A bonds the second main surface 31B of the base material layer 31 and the first main surface 32A of the intermediate layer 32 together. Adhesive layer 34 includes a second adhesive layer 34B provided between intermediate layer 32 and sealant layer 33 . The second adhesive layer 34B bonds the second major surface 32B of the intermediate layer 32 and the first major surface 33A of the sealant layer 33 together.

Layer structure 30 may include an ink layer. The ink layer displays information about the contents C of the steamable pouch 10 by displaying characters or graphics. The information about the content C includes information about an appropriate cooking method and nutrition of the food when the content C is food. The ink layer is provided on the first main surface 31A of the base material layer 31 . The ink layer is appropriately selected from among known printing methods in consideration of the printability of the substrate layer 31, design properties such as color tone, adhesion with other layers, safety as a pervapor-type pouch 10, and the like. be done. The printing method is, for example, a gravure printing method, an offset printing method, a gravure offset printing method, a flexographic printing method, or an inkjet printing method. An overprint varnish may additionally be printed on the ink layer.

Vapor-type pouch 10 further comprises a thermal release layer 60 for facilitating peeling of the components included in layer structure 30 when vapour-type pouch 10 is opened. A thermal release layer 60 is provided between the layer including the paper layer and the adhesive layer 34 . The thermal release layer 60 has the effect of weakening the adhesion between the layer containing the paper layer and the adhesive layer 34 when heated.

In one example, thermal release layer 60 includes varnish. The varnish includes a first varnish printed on the surface of the paper layer and a second varnish printed on the first varnish. The first varnish is used for sealing the paper layer. The second varnish is used for easy peeling between the layer including the paper layer and the adhesive layer 34 .

The peel strength of the thermal peel layer 60 was measured with reference to JIS Z1707:2019. The preferred peel strength of the thermal peel layer 60 is 1 N/15 mm or more at room temperature when the tensile speed is 300 mm/min. The preferable peel strength of the thermal peel layer 60 is less than 1 N/15 mm at the heating temperature when the tensile speed is 300 mm/min. Room temperature is, for example, 25°C. The heating temperature is 80° C., for example.

The steamable pouch 10 further includes an easy-to-open portion 70 that facilitates opening when the steamable pouch 10 is opened. The easy-open portion 70 includes a perforation line 71 and a notch 72 . The tear line 71 is provided at least partially between the first side seal portion 43 and the second side seal portion 44 along the standard width direction XA. In this embodiment, the perforation line 71 is formed straight. The perforation line 71 is composed of a plurality of perforations. Preferably, a plurality of perforations are provided in the standard height direction XB.

The notch 72 is formed such that the tip portion 72A of the notch 72 is positioned on the tear line 71 or an imaginary line extending from the tear line 71 . A notch 72 is formed in at least one of the first side seal portion 43 and the second side seal portion 44 . FIG. 1 shows an example in which a notch 72 is formed in the first side seal portion 43 .

The first predetermined region R1 where the thermal peeling layer 60 is provided will be described. The first predetermined region R1 includes at least the protruding portion 12. As shown in FIG. The first predetermined region R<b>1 includes at least a portion of the vapor-permeable seal portion 51 of the vapor-permeable portion 50 provided in the projecting portion 12 .

A first predetermined region R1 indicates a portion where dark dots are formed. The first predetermined region R<b>1 includes at least a portion of the vapor-permeable seal portion 51 and at least one of the cuts 52 . In the example shown in FIG. 3, the first predetermined region R1 includes the entire fourth vaporization seal portion 51D and part of the third vaporization seal portion 51C and the fifth vaporization seal portion 51E. The first predetermined region R1 includes a second notch 52B.

In the example shown in FIG. 4, the first predetermined region R1 includes all of the first to seventh vapor seal portions 51A to 51G. The first predetermined region R1 includes all of the first cut 52A, the second cut 52B, and the third cut 52C. The first predetermined region R<b>1 is provided over the entire sheet 20 forming the projecting portion 12 . In the example shown in FIG. 5, in addition to the locations shown in FIG.

As shown in FIGS. 3 to 5, the vapor-vapor pouch 10 includes a second predetermined region R2 where the thermal release layer 60 is not formed. A second predetermined region R2 indicates a portion where dark dots are not formed. Since the thermal release layer 60 is not formed in the second predetermined region R2, the layer structure 30 is less likely to be peeled off during heating.

An example of a method of filling the content C into the pervaporized pouch 10 will be described. One of the seal portions 41 to 44 of the vapor-sealing pouch 10 before filling is not sealed. In one example, the upper seal portion 41 is not formed. An opening (not shown) is formed in a portion where the upper seal portion 41 is formed. The upper seal portion 41 is formed by filling the content C from the opening and heat-sealing the portion. As a result, the contents C are preserved in the pervapor-type pouch 10 .

1, 6 and 7, the action of the pervaporization pouch 10 of the embodiment will be described. Vapor-type pouch 10 is heated by heating means for heating contents C. As shown in FIG. An example of a heating means is a microwave oven. As the steamable pouch 10 is heated, the content C generates steam. Since the storage space S of the vapor-permeable pouch 10 is closed by the sealing portion 40, the pressure in the storage space S rises as water vapor is generated. As the pressure rises, the pressure near the vaporizing section 50 rises. As shown in FIG. 6 , a thermal peeling layer 60 is formed in a first predetermined region R<b>1 including the vapor passage seal portion 51 of the vapor passage portion 50 . A gap G is formed between the base layer 31 and the intermediate layer 32 by peeling the thermal peeling layer 60 by heating the vapor-passage pouch 10 . In the present embodiment, since the thermal release layer 60 is formed on the first sheet 21 that constitutes the projecting portion 12, a gap G1 is formed between the base layer 31 and the intermediate layer 32 of the first sheet 21. . A gap G1 is formed for the sealant layers 33 of the first sheet 21 forming the vapor-permeable seal portion 51 to expand and peel off due to the pressure in the accommodation space S. As shown in FIG. By peeling off the vapor passage seal portion 51 of the vapor passage portion 50 , the accommodation space S and the outside are connected via the cut 52 . As the water vapor generated in the accommodation space S escapes from the vapor passage part 50, the increase in the pressure in the accommodation space S is suppressed. After the heating of the steamable pouch 10 is completed, the user opens the steamable pouch 10 along the tear line 71 of the easy-to-open portion 70 .

According to the vapor-permeable pouch 10 of the embodiment, the following effects are further obtained.
(1) Since the basis weight of the paper constituting the paper layer is 30 g/m ² or more, even when the amount of the resin material constituting the base material layer 31 and the intermediate layer 32 is small, the strength of the steamable pouch 10 is preferably increased. can be maintained. Since the basis weight of the paper constituting the paper layer is less than 200 g/m ² , various costs in manufacturing the steamable pouch 10 are reduced.

(2) The vapor-vapor-type pouch 10 is formed so as to include portions other than the vapor-vapor portion 50 in the first predetermined region R1. In the steamable pouch 10 after steaming, an air layer is formed between the base layer 31 including the paper layer and the intermediate layer 32 in the portion corresponding to the first predetermined region R1. Therefore, it is possible to improve the heat insulating properties of the pervaporized pouch 10 after pervaporization.

(Modification)
The description of the embodiment is an illustration of the form that the pervaporized pouch according to the present invention can take, and is not intended to limit the form. The vapour-type pouch according to the present invention can take a form other than the embodiment, for example, modifications of the embodiment shown below, and a combination of at least two modifications not contradicting each other.

Layer structure 30 is optionally varied. In one example, the intermediate layer 32 is made of a material that can be heat-bonded to the sealant layer 33 . The intermediate layer 32 shown in FIG. 8 is made of a polyethylene resin that can be thermally welded to the material forming the sealant layer 33 . Therefore, the configuration of the second adhesive layer 34B can be omitted. Polyethylene resins are included, for example, in densities of 0.90 to 0.96 g/m ³ . Preferably, the polyethylene resin has a density within the range of 0.91-0.93 g/m ³ . When made of such a polyethylene resin, the thickness in the stacking direction is, for example, within the range of 5 to 30 μm.

- As for the steamable pouch 10 of a modification, the intermediate|middle layer 32 is comprised by a paper layer. In this case, the thermal release layer 60 is formed at least on the second adhesive layer 34B. The base material layer 31 is composed of the material that constitutes the intermediate layer 32 of the embodiment. At least one of polyethylene terephthalate, polypropylene, polyester, and polyamide deposited with an inorganic thin film such as aluminum oxide or silicon oxide. Another example is nylon.

- The thermal release layer 60 may be composed of a material other than the varnish 61 . In one example, thermal release layer 60 is composed of an adhesive that is weaker than the adhesive that composes adhesive layer 34 . Preferably, the thermal peeling layer 60 has a thermal peeling action that weakens the adhesion when the vapor-steaming pouch 10 is heated.

- At least one of the base material layer 31 and the intermediate layer 32 may be composed of a paper layer and a layer composed of a material other than paper. Materials other than paper are at least one of polyethylene terephthalate, polypropylene, polyester, and polyamide deposited with an inorganic thin film such as aluminum oxide or silicon oxide. Another example is nylon. In this case, the paper layer of the base material layer 31 is formed on the second main surface 31B side. A thermal release layer 60 is provided between the paper layer on the second main surface 31B side and the first adhesive layer 34A.

DESCRIPTION OF SYMBOLS 10... Steaming type pouch 11... Pouch main body 12... Projection part 20... Sheet 21... First sheet 22... Second sheet 30... Layer structure 31... Base material layer 32... Intermediate layer 33... Sealant layer 40... Seal part 50... Vaporizing section 60 Thermal release layer S Accommodating space R1 First predetermined area R2 Second predetermined area

Claims (5)

a pouch body composed of a sheet having a layered structure including a paper layer and a sealant layer and having a storage space;
a protruding portion configured to protrude from the pouch body, wherein
The protruding part has a vapor passage part that opens when the pressure in the housing space increases,
The layer structure of the sheet includes a heat release layer laminated on the paper layer in a first predetermined region including at least a portion of the vapor-permeable pouch. The sheet includes a first sheet and a second sheet,
The vapor-vapor pouch according to claim 1, wherein the thermal release layer is provided on at least one of the first sheet and the second sheet. The layer structure includes an intermediate layer provided between the paper layer and the sealant layer,
The vapor-passable pouch according to claim 1 or 2, wherein the thermal release layer is provided between the paper layer and the intermediate layer. The vaporization type pouch according to any one of claims 1 to 3, wherein the vaporization portion includes a vaporization seal portion and a notch. The steamable pouch according to any one of claims 1 to 4, further comprising a second predetermined region where the thermal release layer is not formed.

Images