JP2018114995A - Steam release pouch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steam release pouch which can easily open an opening of the pouch and which can exhaust steam properly.SOLUTION: A steam release pouch includes: a sheet including a first sheet and a second sheet; a seal part for sealing the sheet; an opening for opening a storage space; a seal planned part in which formation of a first seal part for closing the opening is planned; a steam passing part formed at the sheet so as to open by the pressure increase in the storage space; and a cutting line for guiding cutting of the first seal part in the state where the first seal part is formed. The sheet includes an outermost layer 20A constituted by a first stretched film, an intermediate layer 20B constituted by a second stretched film and an innermost layer 20C constituted by a non-stretched film. The cutting line is formed at one layer or two layers out of the outermost layer 20A, the intermediate layer 20B and the innermost layer 20C so that a portion cut in continuously in both the outermost layer 20A and the intermediate layer 20B does not exist.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a steam release pouch.

  Vapor vent pouches that contain heated contents are known. The steam vent pouch is a sheet sealed so as to form a storage space capable of storing the contents, a steaming portion in which a part of the sheet is sealed so as to open as the pressure of the storage space increases, and It includes an opening formed so that the contents can be filled into the accommodation space. In the state where the contents are stored in the storage space of the steam release pouch, the storage space is closed by sealing the opening. When the steam vent pouch containing the contents is heated by heating means such as a microwave oven, water vapor is generated from the contents, the pressure in the accommodation space is increased, and stress is generated in each part of the sheet. When the pressure in the storage space rises to a certain level, the seal that forms the steaming part is peeled off, and a passage that connects the housing space and the external space is formed in the steaming part. For this reason, the water vapor in the storage space passes through the passage formed in the steam passage and is discharged to the outside of the steam release pouch, thereby suppressing an increase in pressure in the storage space. Patent Document 1 discloses an example of a conventional steam venting pouch. This steam vent pouch includes a notch (13) and a tearing guide (20) as shown in FIG. Paragraph 0029 of Patent Document 1 shows that an example of the tear guiding portion (20) is a perforation. Since the notch (13) and the tear guiding part (20) are formed, when the contents are taken out from the storage space after the heating of the contents is finished, the closing seal part sealing the opening is easily cut off. Can do.

JP 2009-23704 A

  When a relatively strong stress is generated in the tearing guide portion (20) of the sheets (101a, 101b) when the pressure in the accommodation space increases as the steam release pouch described in Patent Document 1 is heated. Conceivable. In order to discharge steam appropriately from the steaming section, it is preferable that the tear guiding section (20) does not tear even when a strong stress is generated in the tear guiding section (20). In patent document 1, the stress which arises in the tear induction | guidance | derivation part (20) with the raise of the pressure of a storage space is not examined especially. For this reason, it is desirable to provide a steam venting pouch that can easily open the opening of the pouch and appropriately discharge steam.

(1) A seal that seals the sheet so that a sheet including the first sheet and the second sheet facing each other and a storage space capable of storing contents are formed between the first sheet and the second sheet. An opening that opens the receiving space, a seal that is scheduled to form a closing seal that closes the opening, and an increase in pressure in the receiving space when the closing seal is formed A steam venting pouch comprising a steaming part formed in the sheet so as to be opened by, and a cutting line for guiding cutting of the closing seal part in a state where the closing seal part is formed, An outermost layer composed of a first stretched film, an intermediate layer composed of a second stretched film, and an innermost layer composed of an unstretched film. Vapor vent formed in one or two of the outermost layer, the intermediate layer, and the innermost layer so that there is no continuous cut in both the layer and the intermediate layer Pouch.
When a steam vent pouch in which the contents are accommodated in the accommodating space and a closed seal portion is formed (hereinafter referred to as a “closed steam vent pouch”) is heated, the steaming portion is increased as the pressure in the accommodating space increases. Is peeled off, and a passage communicating the accommodation space with the external space is formed in the steaming section. For this reason, the water vapor in the storage space passes through the passage formed in the steam passage and is discharged to the outside of the steam release pouch, thereby suppressing an increase in pressure in the storage space. In addition, since the tear line is formed in one or two of the outermost layer, the intermediate layer, and the innermost layer, when a force that tears the sheet along the tear line is applied to the sheet, the sheet follows the tear line. Torn easily. In addition, since there is no part where the cut line is cut in both the outermost layer and the intermediate layer, which have the property of being easily torn from the cut, the cut line in the sheet is formed when the closed steam vent pouch is heated. The part where it is hard to tear. For this reason, the water vapor | steam of an accommodation space is appropriately discharged | emitted from the channel | path formed in the steaming part to external space.

(2) The steam release pouch according to (1), wherein the cut line is formed only in the outermost layer among the outermost layer, the intermediate layer, and the innermost layer.
For this reason, when a force other than the force for cutting the closing seal portion along the cut line is applied to the sheet, the portion where the cut line is formed is difficult to break.

(3) The steam release pouch according to (1), wherein the cut line is formed only in the intermediate layer among the outermost layer, the intermediate layer, and the innermost layer.
For this reason, when a force other than the force for cutting the closing seal portion along the cut line is applied to the sheet, the portion where the cut line is formed is difficult to break.

(4) The steam release pouch according to (1), wherein the cut line is formed only in the innermost layer among the outermost layer, the intermediate layer, and the innermost layer.
For this reason, when a force other than the force for cutting the closing seal portion along the cut line is applied to the sheet, the portion where the cut line is formed is difficult to break.

(5) The steam release pouch according to (1), wherein the cutoff line is formed in the outermost layer and the innermost layer and is not formed in the intermediate layer.
Since the cut line can be visually recognized from the outside of the pouch, the user can cut the closing seal portion while visually checking the cut line. In addition, since a cut line is formed in two of the three layers of the outermost layer, the intermediate layer, and the innermost layer, the sheet is applied when force is applied to the sheet to cut the closing seal portion along the cut line. Tearing easily proceeds along the cutoff line.

(6) The steam release pouch according to (1), wherein the cutoff line is formed in the intermediate layer and the innermost layer and is not formed in the outermost layer.
Since the cutoff line is covered with the outermost layer, when a force other than the force for cutting the closing seal portion along the cutoff line is applied to the sheet, the portion where the cutoff line is formed is difficult to break. In addition, since a cut line is formed in two of the three layers of the outermost layer, the intermediate layer, and the innermost layer, the sheet is applied when force is applied to the sheet to cut the closing seal portion along the cut line. Tearing easily proceeds along the cutoff line.

(7) The cut line is formed so as not to penetrate the innermost layer, and an opening of a cut forming the cut line is formed on a surface of the innermost layer on the intermediate layer side. (4) to (6 ) A steam release pouch according to any one of the above.
Since the notch for the innermost layer is covered with the intermediate layer, when the chips generated with the formation of the cut line are present in the cut line, the chip does not move to the accommodation space.

(8) The sheet further includes a first adhesive layer that adheres the outermost layer and the intermediate layer, and a second adhesive layer that adheres the intermediate layer and the innermost layer, (1) to (7) The steam release pouch according to any one of the above.
For this reason, the strength of the sheet is increased.

  (9) The material constituting the outermost layer is polyethylene terephthalate, the material constituting the intermediate layer is nylon, and the material constituting the innermost layer is unstretched polypropylene, (1) to (8) The steam release pouch according to any one of the above.

  According to the steam release pouch of the present invention, the opening of the pouch can be easily opened, and steam can be discharged appropriately.

The front view of the steam release pouch of embodiment. Sectional drawing which shows the layer structure of a sheet | seat. The front view of the steam release pouch before an opening part is closed. The enlarged view of the steaming part of the state of opening, and its periphery. The enlarged view of X5 of FIG. The front view of the steam release pouch of the state opened. Sectional drawing of the sheet | seat which shows the form of cutting of a 1st-3rd group. Sectional drawing of the sheet | seat which shows the form of cutting of a 4th group. Sectional drawing of the sheet | seat which shows the form of cutting of a 5th group. A schematic diagram of a laminator. The table | surface which shows the test result of the 1st-4th test. The enlarged view of the steaming part of a modification, and its periphery.

(Embodiment)
FIG. 1 shows an example of a steam vent pouch 10 that can accommodate the contents C suitable for heating and discharge the steam generated from the contents C. The contents C are heated objects that generate water vapor when heated. An example of the contents C is food. An example of food is a fluid food such as stew and soup. The steam release pouch 10 is configured to be stored for a long period of time while maintaining the quality of the contents C. The steam release pouch 10 can take various shapes. Examples of shapes that the steam release pouch 10 can take are a flat bag type, a standing type, a gusset type, and a pillar type. The shape of the steam release pouch 10 illustrated in FIG. 1 is a standing type. Hereinafter, the left-right direction of the steam release pouch 10 in the front view of the steam release pouch 10 is referred to as a standard width direction, and a direction orthogonal to the standard width direction is referred to as a standard height direction.

  The steam release pouch 10 includes a sheet 20, a seal part 30, an opening part 40, a guide part 50, and a steaming part 60. The dots in FIG. 1 and the like represent the seal part 30. The sheet 20 includes a first sheet 21, a second sheet 22, and a bottom sheet 23. The first sheet 21 and the second sheet 22 oppose each other so that an accommodation space 10 </ b> C for accommodating the contents C is formed between the sheets 21 and 22. The bottom sheet 23 is disposed on the bottom portions 21A and 22A of the sheets 21 and 22 so as to close the space between the bottom portion 21A of the first sheet 21 and the bottom portion 22A of the second sheet 22. The configuration of the sheet 20 can be arbitrarily selected. In the first example, by folding one sheet, the opposing sheets 21 and 22 and the bottom sheet 23 disposed on the bottom portions 21A and 22A of the sheets 21 and 22 are formed. In the second example, each of the sheets 21 to 23 is three sheets formed individually.

  The sheet 20 has a layer structure in which a plurality of layers are stacked. The layer structure of the sheet 20 can be arbitrarily selected. In the first example, the sheets 21 to 23 have the same layer structure. In the second example, the first sheet 21 and the second sheet 22 have the same layer structure, and the bottom sheet 23 has a different layer structure from the sheets 21 and 22. In the third example, the sheets 21 to 23 have different layer structures. FIG. 1 shows a steam release pouch 10 having the layer structure of the first example.

  FIG. 2 shows a cross-sectional structure of each sheet 21 to 23. Each sheet 21 to 23 includes an outermost layer 20A, an intermediate layer 20B, an innermost layer 20C, a first adhesive layer 20D, and a second adhesive layer 20E. An example of a method for producing each of the sheets 21 to 23 is dry lamination. The first adhesive layer 20D is formed between the outermost layer 20A and the intermediate layer 20B so as to bond the outermost layer 20A and the intermediate layer 20B. The second adhesive layer 20E is formed between the intermediate layer 20B and the innermost layer 20C so as to bond the intermediate layer 20B and the innermost layer 20C.

  The outermost layer 20A is mainly excellent in gloss, printability, and retort resistance. An example of the material constituting the outermost layer 20A is polyethylene terephthalate. The mid layer 20B is mainly excellent in retort resistance, moisture resistance, and gas barrier properties. An example of the material constituting the mid layer 20B is nylon. The innermost layer 20C is excellent in retort resistance, heat sealability, and impact resistance. An example of the material constituting the innermost layer 20C is linear low density polyethylene. An example of the material constituting the first adhesive layer 20D is a polyester-based adhesive. An example of the material constituting the second adhesive layer 20E is a polyester-based adhesive.

  The sealing part 30 shown by FIG. 1 has joined each sheet | seat 21-23 so that each sheet | seat 21-23 may not isolate | separate. In one example, the seal portion 30 joins the innermost layer 20C of the first sheet 21, the innermost layer 20C of the second sheet 22, and the innermost layer 20C of the bottom sheet 23. An example of a method for forming the seal portion 30 is heat sealing. The outer shape of the steam release pouch 10 in front view can be arbitrarily selected. In the example shown in FIG. 1, the outer shape of the steam release pouch 10 is a rectangle. The sheet 20 can be divided into a portion surrounded by the seal portion 30 (hereinafter referred to as “inward portion 24”) and the seal portion 30. The accommodation space 10 </ b> C is a space surrounded by the inner part 24 of the first sheet 21, the inner part 24 of the second sheet 22, and the inner part 24 of the bottom sheet 23, and does not communicate with the outside of the steam release pouch 10. Thus, it is closed by the seal portion 30.

  The seal part 30 includes a closing seal part 31 (hereinafter referred to as “first seal part 31”) that closes the opening 40. In one example, the seal part 30 further includes a second seal part 32, a third seal part 33, and a fourth seal part 34. The first seal portion 31 is provided above the inner portion 24 in the standard height direction. The second seal portion 32 is provided below the inner portion 24 in the standard height direction. The third seal portion 33 is provided on the right side or the left side of the inner portion 24 in the standard width direction. The fourth seal portion 34 is provided on the left side or the right side of the inner portion 24 in the standard width direction.

  An inner edge 31A as an edge on the inner portion 24 side in the first seal portion 31, an inner edge 32A as an edge on the inner portion 24 side in the second seal portion 32, and an edge on the inner portion 24 side in the third seal portion 33. An inner edge 33 </ b> A and an inner edge 34 </ b> A that is an edge of the fourth seal portion 34 on the inner portion 24 side define an outer shape of the inner portion 24. The outer edge 31B which is the edge opposite to the inner edge 31A in the first seal part 31, the outer edge 32B which is the edge opposite to the inner edge 32A in the second seal part 32, and the opposite side from the inner edge 33A in the third seal part 33 An outer edge 33B that is the edge of the steam release pouch 10 and an outer edge 34B that is the edge opposite to the inner edge 34A of the fourth seal portion 34 define the outline of the steam release pouch 10.

  The width of each seal part 31-34 can be selected arbitrarily. The width of each seal part 31-34 is the length between inner edge 31A-34A and the outer edges 31B-34B in the normal line of the centerline of each seal part 31-34. The center lines of the seal portions 31 to 34 are virtual line segments that pass between the inner edges 31A to 34A and the outer edges 31B to 34B. When the width of each seal part 31-34 differs for every site | part, for example, the maximum width or the average of the width | variety of the some site | part in each of each seal part 31-34 represents the width | variety of the seal | sticker part.

  It is preferable that the width and height of the steam release pouch 10 are determined, for example, from the relationship between the amount of contents C to be accommodated and ease of carrying. The width of the steam release pouch 10 is the length between the outer edge 33B of the third seal portion 33 and the outer edge 34B of the fourth seal portion 34 in a line segment orthogonal to the standard height direction. When the width of the steam release pouch 10 is different for each part, for example, the maximum width or the average of the widths of a plurality of parts represents the width of the steam release pouch 10. The height of the steam release pouch 10 is the length between the outer edge 31B of the first seal portion 31 and the outer edge 32B of the second seal portion 32 in a line segment orthogonal to the standard width direction. When the height of the steam release pouch 10 is different for each part, for example, the maximum height or the average of the heights of the plurality of parts represents the height of the steam release pouch 10.

  The opening 40 is formed between the upper part 21B of the first sheet 21 and the upper part 22B of the second sheet 22 so that the contents C can be taken out from the accommodation space 10C. In the steam release pouch 10 shown in FIG. 1, the opening 40 is closed by the first seal portion 31. The steam release pouch 10 with the opening 40 closed (hereinafter sometimes referred to as “steam release pouch 10 after closing”) includes a pouch body 10A and a scheduled separation portion 10B. The pouch main body 10 </ b> A and the scheduled separation part 10 </ b> B are separated by a cut line 51 that constitutes the guide part 50. The pouch main body 10 </ b> A is a part that accommodates the contents C. The scheduled separation portion 10B is a part of each sheet 21 and 22 including the first seal portion 31, and is a portion that the user separates from the pouch body 10A in order to open the opening 40.

  The guide part 50 is formed between the pouch body 10A and the scheduled separation part 10B so that the sheets 21 and 22 can be easily cut when separating the scheduled separation part 10B from the pouch body 10A. The guide part 50 includes a cut line 51 and a notch 52. The cut line 51 is a set of perforations formed in the seal portions 33 and 34 and the inner portions 24 of the sheets 21 and 22, and is formed in a straight line. The notch 52 is formed in at least one of the third seal portion 33 and the fourth seal portion 34 so that the tip end portion of the notch 52 is located on the imaginary line obtained by extending the cut line 51. FIG. 1 shows an example in which a notch 52 is formed in each of the third seal portion 33 and the fourth seal portion 34.

  The steam release pouch 10 is heated by heating means in order to heat the contents C. An example of the heating means is a microwave oven. Steam is generated from the contents C as the steam release pouch 10 is heated. In the steam venting pouch 10 after closing, since the storage space 10C is closed by the seal portion 30, the pressure in the storage space 10C increases with the generation of water vapor. The vapor passage section 60 opens as the pressure in the storage space 10 </ b> C increases, and is configured to discharge the water vapor in the storage space 10 </ b> C to the outside of the steam release pouch 10. In a preferred example, the vapor passage section 60 is configured to open when the pressure in the accommodation space 10C rises to a pressure within a predetermined pressure range. The vapor passing section 60 can take various forms. In the first example, the vapor passing part 60 constitutes a part of the seal part 30. In the specific example of the first example, the vapor passing section 60 is provided on at least one of the third seal section 33 and the fourth seal section 34. In the second example, the vapor passing part 60 is provided on the inner part 24 of each of the sheets 21 and 22 independently of the seal part 30. In the specific example of the second example, holes (not shown) penetrating the sheets 21 and 22 are formed in the inner portions 24 of the sheets 21 and 22. A steaming portion 60 that seals the periphery of the hole is formed in the inner portion 24 of each sheet 21, 22 so that the accommodation space 10 </ b> C does not communicate with the hole.

  FIG. 1 shows a first example in which the steaming section 60 is provided only in the fourth seal section 34. The shape of the vapor passing section 60 is a shape that is recessed inward from the outside in the standard width direction. The front end portion 61 which is the innermost portion in the standard width direction in the vapor passing section 60 is provided at a place where strong stress concentration occurs when the pressure in the accommodation space 10C of each of the sheets 21 and 22 is increased. When the pressure in the storage space 10C rises to a pressure within a predetermined pressure range, the steaming section 60 opens. Specifically, the first sheet 21 and the second sheet 22 that are joined at the front end 61 of the steaming section 60 are peeled off as the accommodation space 10C rises, and as shown in FIG. A steam vent passage 62 that communicates with the outside of the steam vent pouch 10 is formed in the steam passage 60. The range in which the steaming part 60 peels differs depending on the magnitude of the pressure in the accommodation space 10C. When the pressure in the storage space 10 </ b> C is high, the peeling may proceed to the base portion of the steaming section 60. The passage area of the steam release passage 62 becomes wider as the separation of the vapor passage section 60 proceeds. When the steaming section 60 is opened, the water vapor in the storage space 10 </ b> C passes through the steam vent passage 62 and is discharged to the outside of the steam vent pouch 10. By discharging the water vapor, an increase in the pressure of the storage space 10C is suppressed, and the steam release pouch 10 is prevented from rupturing.

  FIG. 3 shows the steam vent pouch 10 before the opening 40 is closed (hereinafter, sometimes referred to as “steam vent pouch 10 before closing”). The contents C are put into the accommodation space 10C from the opening 40 of the steam release pouch 10 before closing. The first seal portion 31 is formed by applying heat sealing to the planned seal portion 70 where the formation of the first seal portion 31 is scheduled after the contents C are charged, and after the closure shown in FIG. A steam release pouch 10 is obtained.

  FIG. 6 shows a steam venting pouch 10 in which the scheduled separation portion 10B is separated from the pouch body 10A and the opening 40 is opened (hereinafter sometimes referred to as “steaming pouch 10 after opening”). When opening the opening 40 of the steam vent pouch 10 (see FIG. 1) after closing, the sheets 21 and 22 are torn from the front end of the notch 52, and the tearing of the sheets 21 and 22 proceeds along the cut line 51. Thus, a force is applied to each of the sheets 21 and 22. When the scheduled separation portion 10B is separated from the pouch body 10A, the entire opening 40 is opened.

  The guide part 50 in which the cut line 51 is formed has a lower tear strength than the other parts of the sheets 21 and 22 in which the cut line 51 is not formed. For this reason, when a force is applied to the guide portion 50 in the direction along the cut line 51, the sheets 21 and 22 are easily torn along the cut line 51. The cut line 51 includes a plurality of cuts 51A formed discontinuously in the standard width direction. A means for forming the cut line 51 is, for example, a perforation machine.

  FIG. 5 is an enlarged view of the portion X5 in FIG. 1, and shows an example of a specific form of the cut line 51. FIG. In this example, a cut line 51 is configured by a plurality of cut groups 51G arranged in the standard width direction. One cut group 51G is composed of a plurality of cuts 51A arranged in the standard height direction. Each notch 51A constituting one notch group 51G has a first type of notch 51A that inclines from one side to the other in the standard height direction as it goes from one side to the other in the standard width direction, and As it goes from one to the other, it is classified into a second type of cut 51A that inclines from the other in the standard height direction to the other. A plurality of first-type cuts 51A and second-type cuts 51A that are alternately formed in the standard height direction constitute one cut group 51G.

  In a preferred example, the notch 51A does not penetrate all three layers of the outermost layer 20A, the intermediate layer 20B, and the innermost layer 20C constituting each of the sheets 21, 22, and one or two of the three layers. Formed in layers. Since the notch 51A does not penetrate the three layers of the sheets 21 and 22, the contents C accommodated in the accommodating space 10C in the steam venting pouch 10 (see FIG. 1) after closing the guide portion 50 accommodate the guiding space 10C. It does not pass from the side to the outside of the steam release pouch 10. Various forms that the cut 51A can take are classified into first to fifth groups as shown in FIGS.

  The first group includes a plurality of forms in which cuts 51A are formed only in the outermost layer 20A among the outermost layer 20A, the intermediate layer 20B, and the innermost layer 20C. In the first form of the first group shown in FIG. 7A, a cut 51A is formed in the outermost layer 20A so as to penetrate the outermost layer 20A. In the second form of the first group shown in FIG. 7 (b), the opening 51B of the cut 51A does not penetrate the outermost layer 20A, and the surface on the outer side of the steam release pouch 10 in the outermost layer 20A. A cut 51A is formed in the outermost layer 20A so as to open. In the 3rd form of the 1st group shown in Drawing 7 (c), opening 51B of notch 51A does not penetrate outermost layer 20A, and storage space 10C side of steam venting pouch 10 in outermost layer 20A Cuts 51A are formed in the outermost layer 20A so as to open to the surface.

  The second group includes a plurality of forms in which cuts 51A are formed only in the intermediate layer 20B among the outermost layer 20A, the intermediate layer 20B, and the innermost layer 20C. In the first form of the second group shown in FIG. 7D, a cut 51A is formed in the intermediate layer 20B so as to penetrate the intermediate layer 20B. In the second form of the second group shown in FIG. 7 (e), the opening 51B of the cut 51A does not penetrate the intermediate layer 20B, and the surface on the outside of the steam release pouch 10 in the intermediate layer 20B. A cut 51A is formed in the intermediate layer 20B so as to open. In the 3rd form of the 2nd group shown in Drawing 7 (f), opening 51B of cut 51A does not penetrate intermediate layer 20B, and storage space 10C side of steam venting pouch 10 in intermediate layer 20B A cut 51A is formed in the intermediate layer 20B so as to open to the surface.

  The third group includes a plurality of forms in which cuts 51A are formed only in the innermost layer 20C among the outermost layer 20A, the intermediate layer 20B, and the innermost layer 20C. In the first form of the third group shown in FIG. 7G, a cut 51A is formed in the innermost layer 20C so as to penetrate the innermost layer 20C. In the second form of the third group shown in FIG. 7 (h), the opening 51B of the cut 51A does not penetrate the innermost layer 20C, and the surface of the innermost layer 20C on the outer side of the steam release pouch 10 is used. Cuts 51A are formed in the innermost layer 20C so as to open. In the third form of the third group shown in FIG. 7 (i), the opening 51B of the notch 51A does not penetrate the innermost layer 20C, and the storage space 10C side of the steam release pouch 10 in the innermost layer 20C is provided. Cuts 51A are formed in the innermost layer 20C so as to open to the surface.

  The fourth group includes a plurality of forms in which the cut 51A is formed in the outermost layer 20A and the innermost layer 20C of the outermost layer 20A, the intermediate layer 20B, and the innermost layer 20C, and the cut 51A is not formed in the intermediate layer 20B. . In the first form of the fourth group shown in FIG. 8A, a cut 51A is formed in the outermost layer 20A so as to penetrate the outermost layer 20A. Further, a cut 51A is formed in the innermost layer 20C so as to penetrate the innermost layer 20C.

  In the second form of the fourth group shown in FIG. 8B, a cut 51A is formed in the outermost layer 20A in the same manner as the first form of the fourth group (FIG. 8A). Further, the cut 51A is formed in the innermost layer 20C so as not to penetrate the innermost layer 20C and so that the opening 51B of the cut 51A opens on the outer surface of the steam release pouch 10 in the innermost layer 20C. . In the third form of the fourth group shown in FIG. 8C, a cut 51A is formed in the outermost layer 20A, as in the first form of the fourth group (FIG. 8A). Further, the cut 51A is formed in the innermost layer 20C so as not to penetrate the innermost layer 20C and so that the opening 51B of the cut 51A opens to the surface of the innermost layer 20C on the side of the accommodation space 10C of the steam release pouch 10. Is done.

  In the fourth form of the fourth group shown in FIG. 8 (d), the opening 51B of the cut 51A does not penetrate the outermost layer 20A, and the surface of the outermost layer 20A on the outer side of the steam release pouch 10 is used. A cut 51A is formed in the outermost layer 20A so as to open. Further, a cut 51A is formed in the innermost layer 20C so as to penetrate the innermost layer 20C. In the fifth form of the fourth group shown in FIG. 8 (e), the opening 51B of the notch 51A does not penetrate the outermost layer 20A, and the storage space 10C side of the steam release pouch 10 in the outermost layer 20A. Cuts 51A are formed in the outermost layer 20A so as to open to the surface. Further, a cut 51A is formed in the innermost layer 20C so as to penetrate the innermost layer 20C.

  In the sixth form of the fourth group shown in FIG. 8F, a cut 51A is formed in the outermost layer 20A in the same manner as the fourth form of the fourth group (FIG. 8D). Further, similarly to the second form of the fourth group (FIG. 8B), a cut 51A is formed in the innermost layer 20C. In the seventh form of the fourth group shown in FIG. 8G, a cut 51A is formed in the outermost layer 20A in the same manner as the fourth form of the fourth group (FIG. 8D). Further, the cut 51A is formed in the innermost layer 20C as in the fourth form of the fourth group (FIG. 8C).

  In the eighth form of the fourth group shown in FIG. 8 (h), a cut 51A is formed in the outermost layer 20A in the same manner as the fifth form (FIG. 8 (e)) of the fourth group. Further, similarly to the second form of the fourth group (FIG. 8B), a cut 51A is formed in the innermost layer 20C. In the ninth form of the fourth group shown in FIG. 8 (i), a cut 51A is formed in the outermost layer 20A, as in the fifth form of the fourth group (FIG. 8 (e)). Further, the cut 51A is formed in the innermost layer 20C as in the fourth form of the fourth group (FIG. 8C).

  The fifth group includes the outermost layer 20A, the intermediate layer 20B, and a plurality of forms in which the cuts 51A are formed in the intermediate layer 20B and the innermost layer 20C of the innermost layer 20C, and the cuts 51A are not formed in the outermost layer 20A. . In the first form of the fifth group shown in FIG. 9A, a cut 51A is formed in the outermost layer 20A so as to penetrate the intermediate layer 20B. Further, the cut 51A is formed in the innermost layer 20C in the same manner as in the first form of the fourth group (FIG. 8A).

  In the second form of the fifth group shown in FIG. 9B, a cut 51A is formed in the intermediate layer 20B, as in the first form of the fifth group (FIG. 9A). Further, similarly to the second form of the fourth group (FIG. 8B), a cut 51A is formed in the innermost layer 20C. In the third form of the fifth group shown in FIG. 9C, the cut 51A is formed in the intermediate layer 20B as in the first form of the fifth group (FIG. 9A). Further, the cut 51A is formed in the innermost layer 20C as in the fourth form of the fourth group (FIG. 8C).

  In the fourth form of the fifth group shown in FIG. 9 (d), the opening 51B of the cut 51A does not penetrate the intermediate layer 20B, and the surface on the outer side of the steam release pouch 10 in the intermediate layer 20B. A cut 51A is formed in the intermediate layer 20B so as to open. Further, the cut 51A is formed in the innermost layer 20C as in the first mode of the fifth group (FIG. 9A). In the fifth form of the fifth group shown in FIG. 9 (e), the opening 51B of the cut 51A does not penetrate the intermediate layer 20B, and the storage space 10C side of the steam release pouch 10 in the intermediate layer 20B A cut 51A is formed in the intermediate layer 20B so as to open to the surface. Further, the cut 51A is formed in the innermost layer 20C as in the first mode of the fifth group (FIG. 9A).

  In the sixth form of the fifth group shown in FIG. 9 (f), a cut 51A is formed in the intermediate layer 20B as in the fourth form of the fifth group (FIG. 9 (d)). Further, the cut 51A is formed in the innermost layer 20C as in the second form of the fifth group (FIG. 9B). In the seventh form of the fifth group shown in FIG. 9 (g), a cut 51A is formed in the intermediate layer 20B, as in the fourth form of the fifth group (FIG. 9 (d)). Further, the cut 51A is formed in the innermost layer 20C as in the third mode of the fifth group (FIG. 9C).

  In the eighth form of the fifth group shown in FIG. 9 (h), a cut 51A is formed in the intermediate layer 20B, as in the fifth form of the fifth group (FIG. 9 (e)). Further, the cut 51A is formed in the innermost layer 20C as in the second form of the fifth group (FIG. 9B). In the ninth form of the fifth group shown in FIG. 9 (i), a cut 51A is formed in the intermediate layer 20B, as in the fifth form of the fifth group (FIG. 9 (e)). Further, the cut 51A is formed in the innermost layer 20C as in the third mode of the fifth group (FIG. 9C).

  7A and FIGS. 8A to 8C, the cut 51A penetrates the outermost layer 20A. For this reason, the tearability of each sheet | seat 21 and 22 improves. In addition, since the opening 51B of the cut 51A is open on the outer surface of the steam release pouch 10 in the outermost layer 20A, the user can separate the planned separation portion 10B from the pouch main body 10A while viewing the cut line 51. It should be noted that the tearability of each sheet 21, 22 is determined when the force for separating the scheduled separation portion 10 </ b> B from the pouch body 10 </ b> A (hereinafter “separation force”) is applied to each sheet 21, 22. This is a property of the steam release pouch 10 indicating whether tearing easily proceeds along the cut line 51. As the tearability is higher, the tearing of the sheets 21 and 22 is more likely to proceed along the cut line 51.

  7 (b), (c) and FIGS. 8 (d) to (i), the notch 51A is formed in the outermost layer 20A so as not to penetrate the outermost layer 20A. For this reason, when an external force different from the separating force (hereinafter referred to as “other external force”) is applied to the sheets 21 and 22, the guide portions 50 of the sheets 21 and 22 are not easily broken. Further, the adhesive constituting the first adhesive layer 20D is unlikely to flow on the outer surface of the steam release pouch 10 in the outermost layer 20A. 7 (b) and FIGS. 8 (d), (f), and (g), the opening 51B of the notch 51A opens to the outer surface of the steam release pouch 10 in the outermost layer 20A. For this reason, the user can separate the planned separation portion 10B from the pouch body 10A while visually checking the cutoff line 51. 7C and FIGS. 8E, 8H, and 8I, the opening 51B of the cut 51A opens on the surface of the outermost layer 20A on the accommodating space 10C side. Since the opening 51B of the notch 51A is not open on the outer surface of the steam release pouch 10 in the outermost layer 20A, when other external force is applied to the sheets 21, 22, the guides of the sheets 21, 22 are provided. The part 50 is more difficult to break.

  In the configurations of FIGS. 7D to 7I and FIGS. 9A to 9I, the notch 51A is not formed in the outermost layer 20A. For this reason, when other external forces are applied to the sheets 21 and 22, the guide portions 50 of the sheets 21 and 22 are not easily broken. Further, the adhesive constituting the first adhesive layer 20D is unlikely to flow on the outer surface of the steam release pouch 10 in the outermost layer 20A. In the form of FIG. 7D and FIGS. 9A to 9C, the cut 51A penetrates the intermediate layer 20B. For this reason, the tearability of each sheet | seat 21 and 22 improves. In the configurations of FIGS. 7E and 7F and FIGS. 9D to 9I, the cut 51A does not penetrate the intermediate layer 20B. For this reason, when other external forces are applied to the sheets 21 and 22, the guide portions 50 of the sheets 21 and 22 are not easily broken.

  7 (g), FIG. 8 (a), (d), (e) and FIG. 9 (a), (d), (e), the notch 51A penetrates the innermost layer 20C. Yes. For this reason, the tearability of each sheet | seat 21 and 22 improves. 7 (h), (i), FIG. 8 (b), (c), (f) to (i) and FIG. 9 (b), (c), (f) to (i) A cut 51A is formed in the innermost layer 20C so as not to penetrate the innermost layer 20C. For this reason, when other external forces are applied to the sheets 21 and 22, the guide portions 50 of the sheets 21 and 22 are not easily broken. Moreover, the adhesive which comprises the 2nd contact bonding layer 20E does not flow easily to the surface at the side of the accommodation space 10C of the steam release pouch 10 in the innermost layer 20C. 7 (h), FIG. 8 (b), (f), (h), and FIG. 9 (b), (f), (h), the opening 51B of the cut 51A is the innermost layer 20C. Is opened on the outer surface of the steam release pouch 10. For this reason, when the chip | tip produced with formation of the cut | notch 51A exists in the cut | notch 51A, the chip | tip does not move to the accommodation space 10C.

  7A to 7I, the cut 51A is formed in only one of the outermost layer 20A, the intermediate layer 20B, and the innermost layer 20C. For this reason, when other external forces are applied to the sheets 21 and 22, the guide portions 50 of the sheets 21 and 22 are not easily broken. 8 (a) to (i) and FIGS. 9 (a) to (i), cuts 51A are formed in two of the outermost layer 20A, the intermediate layer 20B, and the innermost layer 20C. . For this reason, the tearability of each sheet | seat 21 and 22 improves. 7 (c)-(i), FIG. 8 (e), (h), (i), and FIGS. 9 (a)-(i), an opening is formed on the surface on the outside of the steam release pouch 10. The cut 51A to be formed is not formed in the outermost layer 20A. For this reason, when other external forces are applied to the sheets 21 and 22, the guide portions 50 of the sheets 21 and 22 are not easily broken.

  The layer thickness T (hereinafter referred to as “layer thickness T”) of each of the layers 20A to 20C can be selected individually. In the first example, the layer thickness T of each of the layers 20A to 20C is the same. In the second example, the layer thickness T of the outermost layer 20A and the intermediate layer 20B is the same, and the layer thickness T of the innermost layer 20C is thicker or thinner than the layer thickness T of the outermost layer 20A and the intermediate layer 20B. In the third example, the layer thicknesses T of the layers 20A to 20C are different. The layer thickness T is a distance between one surface and the other surface of each of the layers 20A to 20C on a cross section orthogonal to the sheet 20 in a flat state. A preferable example regarding the maximum value of the layer thickness T of the outermost layer 20A and the intermediate layer 20B is 50 μm. A more preferable example regarding the maximum value of the layer thickness T of the outermost layer 20A and the intermediate layer 20B is 25 μm. A preferable example regarding the minimum value of the layer thickness T of the outermost layer 20A and the intermediate layer 20B is 6 μm. A more preferable example regarding the minimum value of the layer thickness T of the outermost layer 20A and the intermediate layer 20B is 12 μm. A preferable example regarding the maximum value of the layer thickness T of the innermost layer 20C is 120 μm. A more preferable example regarding the maximum value of the layer thickness T of the innermost layer 20C is 80 μm. A preferable example regarding the minimum value of the layer thickness T of the innermost layer 20C is 50 μm. A more preferable example regarding the minimum value of the layer thickness T of the innermost layer 20C is 60 μm.

  The ratio of the depth H of the cut 51A to the layer thickness T of each of the layers 20A to 20C (hereinafter referred to as “cut ratio P”) is determined by the tearability of the sheets 21 and 22 and the sheets 21 and 22 with respect to other external forces. It is preferable to be determined from the relationship with the strength of The formula for obtaining the cutting rate P is “P = (H / T) × 100”. A preferable example regarding the maximum value of the cutting rate P of each layer 20A-20C is 100%. A more preferable example regarding the maximum value of the cutting rate P of each of the layers 20A to 20C is 90%. When the cutting rate P of at least one of the outermost layer 20A and the innermost layer 20C or the cutting rate P of at least one of the intermediate layer 20B and the innermost layer 20C is 100% or less, the sheets 21, 22 with respect to other external forces The strength of the is further improved. When the cutting rate P of at least one of the outermost layer 20A and the innermost layer 20C or the cutting rate P of at least one of the intermediate layer 20B and the innermost layer 20C is 90% or less, the sheets 21, 22 with respect to other external forces The strength of the is further improved. A preferable example regarding the minimum value of the cutting rate P of each layer 20A-20C is 30%. A more preferable example regarding the minimum value of the cutting rate P of each layer 20A-20C is 60%. When the cutting rate P of at least one of the outermost layer 20A and the innermost layer 20C or the cutting rate P of at least one of the intermediate layer 20B and the innermost layer 20C is 30% or more, the tearability of each sheet 21, 22 is More improved. When the cutting rate P of at least one of the outermost layer 20A and the innermost layer 20C or the cutting rate P of at least one of the intermediate layer 20B and the innermost layer 20C is 60% or more, the tearability of the sheets 21 and 22 is Further improve.

  The sheet 20 is manufactured by, for example, a laminator 100 shown in FIG. The laminator 100 manufactures the sheet 20 by joining the first type sheet and the second type sheet. The first type sheet is a sheet to which an adhesive is applied. Specific examples of the first type sheet include a sheet constituted by any one of the layers 20A to 20C, a sheet constituted by the outermost layer 20A and the intermediate layer 20B adhered, and an intermediate layer 20B adhered. And a sheet constituted by the innermost layer 20C. The second type sheet is a sheet bonded to the first type sheet coated with an adhesive. A specific example of the second type sheet is a sheet configured by any one of the layers 20A to 20C.

  The laminator 100 includes an application unit 110, a dryer 120, and a bonding unit 130. The application unit 110 applies an adhesive to the first type sheet. In one example, the application unit 110 includes a first storage roller 101, a plurality of transport rollers 111, an application roller 112, and a container 113. The first storage roller 101 is a roller around which the first type sheet is wound. The plurality of transport rollers 111 are rollers that transport the first type sheet from the first storage roller 101 to the dryer 120. The application roller 112 is a roller that applies the adhesive stored in the container 113 to one surface of the first type sheet. When manufacturing the 1st sheet | seat 21 and the 2nd sheet | seat 22, any one layer of each layer 20A-20C which is a 1st type sheet | seat in which the notch | incision 51A was formed previously is set to the 1st storage roller 101. FIG.

  The dryer 120 dries the adhesive applied to the first type sheet, and removes the solvent remaining on the first sheet. In one example, the dryer 120 includes a first zone 121, a second zone 122, and a third zone 123. The first zone 121 is a zone for mainly drying the adhesive. The second zone 122 and the third zone 123 are zones for mainly removing the solvent.

  The joining unit 130 joins the first type sheet that has passed through the dryer 120 and the second type sheet prepared on the downstream side of the dryer 120. In one example, the joining unit 130 includes a plurality of transport rollers 131, a pair of joining rollers 132, a second storage roller 102, and a third storage roller 103. The plurality of transport rollers 131 is a roller that transports the first type sheet from the dryer 120 to the joining roller 132 and a sheet in which the first type sheet and the second type sheet are joined (hereinafter referred to as “joining sheet”). 3 The roller conveyed to the storage roller 103 is included. The pair of joining rollers 132 joins the first type sheet conveyed from the dryer 120 and the second type sheet supplied from the second storage roller 102.

  In one example, the manufacturing process of the sheet 20 includes a first process to a fourth process. In the first step, among the first storage roller 101 wound with the first type sheet composed of any one of the layers 20A to 20C, and among the layers 20A to 20C joined to the first type sheet A second storage roller 102 around which a second type sheet composed of any one of the above layers is wound is set on the laminator 100. In the second step, the first type sheet and the second type sheet are joined, and the joined sheet is wound around the third storage roller 103. In the third step, the third storage roller 103 around which the joining sheet manufactured in the second step is wound is set in the laminator 100 as the first storage roller 101 or the second storage roller 102 of the same or different laminator 100. The joining sheet wound around the third storage roller 103 set as the first storage roller 101 is the first type sheet of the next fourth step. The joining sheet wound around the third storage roller 103 set as the second storage roller 102 is the second type sheet of the next fourth step. In the third step, the first storage roller 101 on which the first type sheet constituted by the last one layer of the layers 20A to 20C is wound, or the last one layer of the layers 20A to 20C is configured. The second storage roller 102 around which the second type sheet is wound is set on the laminator 100. In the fourth step, the first type sheet and the second type sheet are joined, and the joined sheet is wound around the third storage roller 103. The joining sheet manufactured in the fourth step is the sheet 20. When the joining sheet is manufactured using the first type sheet and the second type sheet in which the notches 51A are formed, the first sheet 21, the second sheet 22, or one sheet including the sheets 21, 22 Is obtained.

  In an example of a preferable manufacturing method, the first type sheet and the second type sheet are selected so that the adhesive does not adhere to the conveyance roller 111 of the application unit 110. When the adhesive adheres to the transport roller 111, the adhesive of the transport roller 111 may adhere to the first type sheet newly transported by the transport roller 111. When an unnecessary adhesive adheres to the first type sheet, there may be a problem that the first type sheet is not conveyed smoothly, for example. From this point, it is preferable that the adhesive does not adhere to the transport roller 111 when the sheet 20 is manufactured.

  Preferred manufacturing methods include a first manufacturing method and a second manufacturing method. The first manufacturing method is suitable for manufacturing a sheet 20 including at least one of a cut 51A that penetrates the outermost layer 20A and a cut 51A that penetrates the innermost layer 20C. The corresponding sheet 20 is shown in FIGS. 7 (a), 7 (g), 8 (a), 8 (d), 8 (e), 9 (a), 9 (d), and FIG. 9 (e) includes a tear line 51 formed in any form. The second manufacturing method is suitable for manufacturing the sheet 20 including the cut 51A penetrating the intermediate layer 20B. The corresponding sheet 20 includes a cut line 51 formed in any of the forms shown in FIGS. 7D, 9A, 9B, and 9C.

  In the first manufacturing method, the sheet 20 is manufactured as follows. In the first step, the first storage roller 101 wound with the first type sheet constituted by the intermediate layer 20B, and the second type sheet constituted by one of the outermost layer 20A and the innermost layer 20C are wound. 2 The storage roller 102 is set on the laminator 100. In the second step, the first type sheet and the second type sheet are joined, and the joined sheet is wound around the third storage roller 103. In the third step, the third storage roller 103 around which the joining sheet manufactured in the second step is wound is set in the laminator 100 as the first storage roller 101 of the same or different laminator 100. In the third step, the second storage roller 102 around which the second type sheet constituted by the other of the outermost layer 20A and the innermost layer 20C is wound is set on the laminator 100. In the fourth step, the first-type sheet and the second-type sheet are joined, and the first sheet 21, the second sheet 22, or one sheet including each of the sheets 21 and 22, which are joined sheets, is stored in the third storage. It is wound on a roller 103. In the third step of the modified example related to the first manufacturing method, the third storage roller 103 around which the joining sheet manufactured in the second step is wound is set in the laminator 100 as the second storage roller 102 of the same or different laminator 100. The In the third step, the first storage roller 101 around which the first type sheet constituted by the other of the outermost layer 20A and the innermost layer 20C is wound is set on the laminator 100.

  In the second manufacturing method, the sheet 20 is manufactured as follows. In the first step, the first storage roller 101 wound with the first type sheet constituted by one of the outermost layer 20A and the innermost layer 20C, and the second type sheet constituted by the intermediate layer 20B are wound. 2 The storage roller 102 is set on the laminator 100. In the second step, the first type sheet and the second type sheet are joined, and the joined sheet is wound around the third storage roller 103. In the third step, the third storage roller 103 around which the joining sheet manufactured in the second step is wound is set in the laminator 100 as the first storage roller 101 of the same or different laminator 100. In the third step, the second storage roller 102 around which the second type sheet constituted by the other of the outermost layer 20A and the innermost layer 20C is wound is set on the laminator 100. In the fourth step, the first-type sheet and the second-type sheet are joined, and the first sheet 21, the second sheet 22, or one sheet including each of the sheets 21 and 22, which are joined sheets, is stored in the third storage. It is wound on a roller 103. In the third step of the modified example related to the second manufacturing method, the third storage roller 103 around which the joining sheet manufactured in the second step is wound is set in the laminator 100 as the second storage roller 102 of the same or different laminator 100. The In the third step, the first storage roller 101 around which the first type sheet constituted by the other of the outermost layer 20A and the innermost layer 20C is wound is set on the laminator 100.

(Example)
The inventor of the present application uses the samples of the example and the comparative example, and the first to third tests for confirming the relationship between the configuration of the guide unit 50 and various performances of the steam release pouch 10 and the configuration of the guide unit 50 are as follows. A fourth test for confirming the influence on the production of the sheet 20 was performed. FIG. 11 shows the results of the first test to the fourth test. In the following description, for convenience of explanation, the same reference numerals are given to portions common to the sample of the example in the sample of the comparative example. An example sample is a steam release pouch 10 according to the embodiment. The sample of the comparative example is a steam vent pouch 10 having a configuration different from the steam vent pouch 10 of the embodiment.

  The steam release pouch 10 of each comparative example is different from the steam release pouch 10 of the embodiment in the following points, and has the same configuration as the steam release pouch 10 of the embodiment in other points. In the steam venting pouch 10 of Comparative Example 1 and Comparative Example 2, the cuts 51A are not formed in any of the outermost layer 20A, the intermediate layer 20B, and the innermost layer 20C. The material which comprises the intermediate | middle layer 20B of each sheet | seats 21 and 22 of the steam release pouch 10 of the comparative example 2 is the biaxially stretched nylon which has a straight cut property. The cut line 51 of the steam release pouch 10 of Comparative Example 3 includes a cut 51A that penetrates the outermost layer 20A and the intermediate layer 20B. The cut 51A is not formed in the innermost layer 20C. The cut line 51 of the steam release pouch 10 of Comparative Example 4 includes an outermost layer 20A, an intermediate layer 20B, and a cut 51A formed in the innermost layer 20C. The cuts 51A formed in the outermost layer 20A and the intermediate layer 20B penetrate the outermost layer 20A and the intermediate layer 20B, respectively. The cut 51A formed in the innermost layer 20C is formed in the innermost layer 20C so as not to penetrate the innermost layer 20C and so that the opening 51B opens on the outer surface of the steam release pouch 10 in the innermost layer 20C. ing.

  The form of the cut 51A of the first embodiment is the form shown in FIG. The form of the cut 51A of the second embodiment is the form shown in FIG. The form of the cut 51A of the third embodiment is the form shown in FIG. The form of the cut 51A of the fourth embodiment is the form shown in FIG. The form of the cut 51A in the fifth embodiment is the form shown in FIG. The form of the cut 51A of the sixth embodiment is the form shown in FIG. The form of the cut 51A in the seventh embodiment is the form shown in FIG. The form of the cut 51A in the eighth embodiment is the form shown in FIG. The form of the cut 51A of the ninth embodiment is the form of FIG. 7 (i). The form of the cut 51A of the tenth embodiment is the form shown in FIG. The form of the cut 51A in Example 11 is the form of FIG. The form of the cut 51A of the twelfth embodiment is the form shown in FIG. The form of the cut 51A of the thirteenth embodiment is the form shown in FIG. The form of the cut 51A in the fourteenth embodiment is the form shown in FIG. The form of the cut 51A in the fifteenth embodiment is the form shown in FIG. The form of the cut 51A of the sixteenth embodiment is the form shown in FIG. The form of the cut 51A in Example 17 is the form of FIG. The form of the cut 51A of the eighteenth embodiment is the form of FIG. 8 (i). The form of the cut 51A of the nineteenth embodiment is the form shown in FIG. The form of the cut 51A of the twentieth embodiment is the form shown in FIG. The form of the cut 51A of Example 21 is the form of FIG. The form of the cut 51A of Example 22 is the form of FIG. 9 (d). The form of the cut 51A in the twenty-third embodiment is the form shown in FIG. The form of the cut 51A in Example 24 is the form of FIG. The form of the cut 51A in Example 25 is the form of FIG. The form of the cut 51A of Example 26 is the form of FIG. 9 (h). The form of the cut 51A in Example 27 is the form of FIG. 9 (i).

  The specifications regarding the sample of each example and each comparative example are as follows. The material constituting the outermost layer 20A is polyethylene terephthalate. The thickness of the outermost layer 20A is 12 μm. The material constituting the mid layer 20B is nylon. The thickness of the intermediate layer 20B is 15 μm. However, only in the sample of Comparative Example 2, the intermediate layer 20B is composed of biaxially stretched nylon having a straight cut property. The material constituting the innermost layer 20C is linear low density polyethylene. The thickness of the innermost layer 20C is 60 μm. The width of the steam release pouch 10 is 150 mm. The height of the steam release pouch 10 is 150 mm.

  In the first test, it is confirmed whether or not water vapor is appropriately discharged from the storage space 10C to the outside of the steam venting pouch 10 without breaking the guide portion 50 when the steam venting pouch 10 is heated by the heating means. did. Specifically, the steam release pouch 10 after being closed was heated by a microwave oven, and the number of times the guide portion 50 was broken before the heating was completed was measured. It is evaluated that water vapor is properly discharged when the number of times that the guide part 50 is broken is less than the specified number of times, and it is evaluated that water vapor is not properly discharged when the number of times that the guide part 50 is broken is equal to or more than the specified number of times. did. The number of trials is 50 times. The specified number of times is one. Content C is 200 g of water. The output of the microwave oven is 1800W. The heating time is 1.5 minutes. The notation “◯” relating to the first test in FIG. 11 indicates that the number of times the guide portion 50 has broken is zero in 50 trials. The notation “x” relating to the first test in FIG. 11 indicates that the number of times the guide portion 50 has broken is one or more in 50 trials. According to the sample of the example, it was confirmed that the guide part 50 did not break when the steam release pouch 10 after being heated was heated.

  In the second test, it was confirmed whether or not the sheets 21 and 22 were torn cleanly along the cut line 51 when the planned separation part 10B was separated from the pouch body 10A. Specifically, the distance between the cutting edge of the first sheet 21 and the cutting edge of the second sheet 22 in the standard height direction (hereinafter referred to as “shift distance”) was measured. When the deviation interval was less than the specified interval, it was evaluated that the sheets 21 and 22 were torn cleanly, and when the deviation interval was not less than the specified interval, it was evaluated that the sheets 21 and 22 were not torn cleanly. The cutting edges of the sheets 21 and 22 are the edges of the sheets 21 and 22 formed in the pouch body 10A and the scheduled separation part 10B, respectively, as the planned separation part 10B is separated from the pouch body 10A. The shift interval is the distance between the cutting edge of the first sheet 21 and the cutting edge of the second sheet 22 in the pouch body 10A, or the cutting edge of the first sheet 21 and the cutting edge of the second sheet 22 in the separation scheduled portion 10B. It is an interval. In the test using the samples of each Example and Comparative Examples 3 and 4, a separation force was applied to each sheet 21 and 22 so that each sheet 21 and 22 was torn along the cut line 51. In the test using the samples of Comparative Examples 1 and 2, a separation force was applied to each of the sheets 21 and 22 so that a portion of each of the sheets 21 and 22 corresponding to the cut line 51 was torn along the standard width direction. The number of trials is 10. The specified interval is 2 mm. The notation “◯” regarding the second test in FIG. 11 indicates that the average value of the deviation intervals in 10 trials is less than 2 mm. The notation “x” regarding the second test in FIG. 11 indicates that the average value of the deviation intervals in 10 trials is 2 mm or more. According to the sample of the example, it was confirmed that the sheets 21 and 22 were torn cleanly along the cut line 51. The deviation interval of the sample of Comparative Example 1 was included in the range of 5 mm or more. The deviation interval of the sample of Comparative Example 2 was included in the range of 2 mm or more and less than 5 mm.

  In the third test, it was confirmed whether or not the chips were mixed into the contents C when the chips were generated as the cut line 51 was formed. Specifically, the opening 40 of the steam venting pouch 10 after closing was opened, and the mixing state of chips in the contents C was visually observed. When chips cannot be visually recognized in the contents C in all of the prescribed number of steam venting pouches 10, it is evaluated that the chips are not mixed in the contents C, and the contents C in at least one of the prescribed number of steam venting pouches 10 are evaluated. It was evaluated that the chips were mixed into the contents C when the chips could be visually recognized inside. The number of trials is one. The specified number is 10 million. Content C is 200 g of water. The notation “◯” regarding the third test in FIG. 11 indicates a case where chips are not mixed in the contents C in all of the 10 million steam venting pouches 10. The notation “x” regarding the third test in FIG. 11 indicates a case where chips are mixed in the contents C in at least one of the 10 million steam venting pouches 10. According to the example in which the notch 51A opened in the inner space 20C side surface of the innermost layer 20C is not formed in the inner space 20C, it has been confirmed that no chips are mixed into the contents C. In addition, even if the material which comprises 20C of innermost layers mixes the content into the content C, it has the property which does not produce a food hygiene problem.

In the fourth test, whether or not the adhesive applied to the first type sheet has adhered to the transport roller 111 when the sheets 21 and 22 are manufactured by the first manufacturing method or the second manufacturing method using the laminator 100. It was confirmed. Specifically, it was measured by an adhesive detector whether or not the adhesive was attached to the surface of the transport roller 111 that made a pair with the application roller 112. The number of trials in the fourth test is one. The application amount of the adhesive is 11 g / m ² . The temperature of the first zone 121 of the dryer 120 is 40 ° C. The temperature of the second zone 122 of the dryer 120 is 50 ° C. The temperature of the third zone 123 of the dryer 120 is 60 ° C. The conveyance speed of the first type sheet in the dryer 120 is 100 m / min. The notation “◯” regarding the fourth test in FIG. 11 indicates that no adhesive is attached to the transport roller 111. The notation “x” regarding the fourth test in FIG. 11 indicates that the adhesive is attached to the transport roller 111. According to the sample of an Example, it was confirmed that an adhesive agent does not adhere to the conveyance roller 111.

(Modification)
The description about the above embodiment is an example of the form that the steam release pouch according to the present invention can take, and is not intended to limit the form. The steam release pouch according to the present invention may take, for example, a form in which a modification of the above-described embodiment shown below and at least two modifications not contradicting each other are combined.

  -The structure of the vapor transmission part 60 can be changed arbitrarily. FIG. 12 is an example of a modification of the vapor passage section 60. The steaming section 60 includes a first portion 60A, a second portion 60B, a third portion 60C, a first corner portion 60D, and a second corner portion 60E. The first portion 60A and the second portion 60B are formed at an interval in the standard height direction and extend from the fourth seal portion 34 to the inside in the standard width direction. The third portion 60C extends in the standard height direction so as to connect the inner end of the first portion 60A and the inner end of the second portion 60B. The first corner portion 60D is configured by an inner end portion of the first portion 60A and one end portion of the third portion 60C. The second corner 60E is configured by an inner end of the second portion 60B and the other end of the third portion 60C. When the pressure of the storage space 10C is increased by heating the steam release pouch 10 including the steaming part 60, for example, the peeling of the steaming part 60 proceeds from the second corner part 60E, and the steaming part 60 opens. By doing so, the water vapor in the storage space 10 </ b> C is discharged to the outside of the steam release pouch 10.

  -The structure of the guide part 50 can be changed arbitrarily. In the first example, the guide portion 50 includes a scratched portion formed in at least one of the third seal portion 33 and the fourth seal portion 34 instead of the notch 52. The scratched portion is a portion where a scratch is formed so that each sheet 21, 22 is easily torn when a separating force is applied to each sheet 21, 22. In a preferred example relating to the first example, the scratched portion is formed such that at least a part of the scratched portion is located on a virtual line obtained by extending the cut line 51. In the second example, the guide portion 50 does not include the notch 52.

  The shape of the cut line 51 can be arbitrarily changed. In the first example, the cutoff line 51 is a straight line that is entirely inclined with respect to the standard width direction. In the second example, the cut line 51 includes a portion inclined with respect to the standard width direction. In the third example, the cutoff line 51 is a curved curve. In the fourth example, the cutoff line 51 includes a curved portion.

DESCRIPTION OF SYMBOLS 10: Steam release pouch 10C: Accommodating space 20: Sheet 20A: Outermost layer 20B: Intermediate layer 20C: Innermost layer 20D: First adhesive layer 20E: Second adhesive layer 21: First sheet 22: Second sheet 30: Seal part 31: 1st seal part (closed seal part)
40: Opening 51: Cut line 60: Steaming part 70: Planned seal part C: Contents

Claims (9)

A sheet including the first sheet and the second sheet facing each other, and a seal portion that seals the sheet so that an accommodation space capable of accommodating contents is formed between the first sheet and the second sheet; An opening that opens the receiving space, a seal that is scheduled to form a closing seal that closes the opening, and an opening due to an increase in pressure in the receiving space when the closing seal is formed A steam venting pouch comprising a steaming part formed in the sheet and a cutting line for guiding the cutting of the closing seal part in a state where the closing seal part is formed,
The sheet includes an outermost layer composed of a first stretched film, an intermediate layer composed of a second stretched film, and an innermost layer composed of an unstretched film,
The cut line is formed in one or two of the outermost layer, the intermediate layer, and the innermost layer so that there is no continuous cut portion in both the outermost layer and the intermediate layer. A steam vent pouch. The steam release pouch according to claim 1, wherein the cutoff line is formed only in the outermost layer among the outermost layer, the intermediate layer, and the innermost layer. The steam release pouch according to claim 1, wherein the cutoff line is formed only in the intermediate layer among the outermost layer, the intermediate layer, and the innermost layer. The steam release pouch according to claim 1, wherein the cutoff line is formed only in the innermost layer among the outermost layer, the intermediate layer, and the innermost layer. The steam release pouch according to claim 1, wherein the cutoff line is formed in the outermost layer and the innermost layer and is not formed in the intermediate layer. The steam release pouch according to claim 1, wherein the cutoff line is formed in the intermediate layer and the innermost layer and is not formed in the outermost layer. The cut line is formed so as not to penetrate the innermost layer, and an opening portion of the cut constituting the cut line is formed on a surface of the innermost layer on the intermediate layer side. The steam release pouch described in 1. The said sheet | seat further contains the 1st contact bonding layer which adhere | attaches the said outermost layer and the said intermediate | middle layer, and the 2nd contact bonding layer which adhere | attaches the said intermediate | middle layer and the said innermost layer. The steam vent pouch described. The material constituting the outermost layer is polyethylene terephthalate,
The material constituting the intermediate layer is nylon,
The steam release pouch according to any one of claims 1 to 8, wherein the material constituting the innermost layer is unstretched polypropylene.

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