JP2018188201A - Steam passing type pouch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steaming type pouch capable of suppressing the generation of wheezing. SOLUTION: A steaming type pouch 10 has a sheet 20 including a first sheet 21 and a second sheet 22 which are overlapped with each other, and a storage space 10C for accommodating a content C is a first sheet 21 and a second sheet 22. A seal portion 30 that joins the first sheet 21 and the second sheet 22 so as to be formed between them, and a part of the seal portion 30, which is configured to be peeled off as the pressure of the accommodation space 10C increases. The steaming section 60 and the outer passage section 90 provided outside the steaming section 60 in the sheet 20 so that the steam discharged to the outside of the accommodation space 10C through the peeled steaming section 60 can flow. , A part of the first sheet 21 and the second sheet 22 in the outer passage 90 so that the generation of whistle noise is suppressed when water vapor passes through the steaming section 60 and is discharged to the outside of the accommodation space 10C. A whistle sound reducing unit 100 for joining a part thereof is provided. [Selection diagram] Fig. 1

Description

  The present invention relates to a steaming type pouch.

  2. Description of the Related Art A steaming type pouch is known that has a structure for storing heated contents and discharging steam generated from the contents by heating to the outside of the steaming pouch. Patent Document 1 discloses an example of a conventional steaming type pouch. As shown in FIG. 1 and the like of Patent Document 1, this steaming type pouch is formed such that a part of the side seal portion (51) protrudes toward the accommodation space (2) side of the steaming type pouch. And an unsealed portion (60) connected to the protruding portion (55) of the pair of sheets (11) constituting the steaming type pouch. When this steaming type pouch is heated by heating means such as a microwave oven, a part of the seal of the overhanging portion (55) is peeled off as the internal pressure of the accommodation space (2) increases, so that the overhanging portion (55 The water vapor passes through the opening and the unsealed portion (60) and is discharged from the outer edge of the unsealed portion (60) to the outside of the steaming type pouch.

Japanese Patent Laid-Open No. 2006-74458

  According to the conventional steaming-type pouch, whistle noise may be generated as water vapor is discharged.

(1) The first sheet and the sheet so that a sheet including the superimposed first sheet and second sheet and a storage space for storing contents are formed between the first sheet and the second sheet. A seal part that joins the second sheet; a part of the seal part; and a steaming part configured to peel off as the pressure in the storage space increases, and the peeled through part of the steaming part. An outer passage portion provided outside the steaming portion in the sheet so that the water vapor discharged to the outside of the housing space can flow, and the water vapor passes through the steaming portion and is outside the housing space. A whistle sound reducing unit that joins a part of the first sheet and a part of the second sheet in the outer passage portion so that the generation of a whistle sound is suppressed when discharged to the Type pouch.
Since the whistle sound reduction unit is provided, the generation of the whistle sound is suppressed when water vapor passes through the steaming unit and is discharged to the outside of the steaming type pouch. The reason why such an effect is obtained is presumed as follows. When the steaming type pouch is expanded by heating, each part of the steaming type pouch is deformed, but the outer passage portion is configured by joining a part of the first sheet and a part of the second sheet. Since the whistle sound reducing portion is provided, the outer passage portion is not easily deformed into a shape that induces the generation of the whistle sound. For this reason, generation | occurrence | production of a whistle sound is suppressed.

(2) The steaming type pouch according to (1), wherein the whistle sound reducing unit is configured by sealing a part of the first sheet and a part of the second sheet.
For this reason, the whistle noise reduction part is difficult to peel off.

(3) The whistle sound reducing portion is configured so that a narrow passage is not formed in the outer passage portion when the seal portion is deformed with an increase in pressure in the accommodation space. (1) or (2) The steaming type pouch described in 1.
For this reason, generation | occurrence | production of a whistle sound is suppressed further.

(4) The seal part includes a side seal part formed along the side of the sheet, the steaming part is connected to the side seal part, and the whistle sound reducing part defines an outline of the accommodation space. The steaming-type pouch according to any one of (1) to (3), which is provided on an outer edge side of the side seal portion with respect to a virtual line obtained by extending an inner edge of the side seal portion.
It has been confirmed by tests that the generation of whistle noise is further suppressed when the steaming section is configured as described above.

(5) The first dimension which is the dimension of the outer passage portion in the first direction along the side of the seat is determined so as to contribute to the suppression of the generation of the whistle noise. The steaming type pouch according to any one of the above.
Tests have confirmed that the first dimension affects the generation of whistle noise. For this reason, generation | occurrence | production of a whistle sound is further suppressed by determining a 1st dimension as mentioned above.

(6) The steaming type pouch according to (5), wherein the first dimension is 12 mm or more.
When the first dimension is included in the above range, it was confirmed by a test that the generation of whistle noise is further suppressed.

(7) The steaming type pouch according to (5) or (6), wherein the first dimension is 18 mm or less.
When the first dimension is included in the above range, foreign matter is less likely to enter the accommodation space.

(8) The second dimension, which is the dimension of the outer passage portion in the second direction orthogonal to the side of the sheet, is determined so as to contribute to the suppression of the generation of the whistle noise. (1) to (7) The steaming type pouch according to any one of the above.
Tests have confirmed that the second dimension affects the generation of whistle noise. For this reason, generation | occurrence | production of a whistle sound is further suppressed by determining a 2nd dimension as mentioned above.

(9) The steaming type pouch according to (8), wherein the second dimension is 12 mm or more.
When the second dimension is included in the above range, it was confirmed by a test that the generation of whistle noise is further suppressed.

(10) The steaming type pouch according to (8) or (9), wherein the second dimension is 24 mm or less.
When the second dimension is included in the above range, a storage space having a volume suitable for storing contents can be easily formed in a pouch having a standard size.

  According to the steaming type pouch according to the present invention, the generation of whistle noise is suppressed.

The front view of the steaming type pouch of embodiment. FIG. 2 is an enlarged view of a steaming part in FIG. The front view of the steaming type pouch before an opening part is closed. FIG. 2 is a front view of a steaming type pouch in a state where the steaming section of FIG. 1 is opened. The figure which shows the state in which the steaming type pouch of FIG. 4 was inclined. The figure which shows the state by which the upper seal part of FIG. 5 is cut off. The table | surface which shows the test condition of the comparative example regarding an examination, and an Example. The table | surface which shows the test result of a comparative example. The table | surface which shows the test result of an Example. The table | surface which shows the test result of an Example. The enlarged view of the steaming part of a modification, and its periphery.

(Embodiment)
FIG. 1 shows an example of a steaming type pouch 10 that can accommodate the contents C suitable for heating and discharge the water vapor 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 steaming type pouch 10 is configured to be stored for a long period of time while maintaining the quality of the contents C. The steaming type pouch 10 can take various shapes. Examples of shapes that can be taken by the steaming type pouch 10 are a flat bag type, a standing type, a gusset type, and a pillar type. The shape of the steaming type pouch 10 illustrated in FIG. 1 is a standing type. Hereinafter, the left-right direction of the steaming type pouch 10 in the front view of the steaming type 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 steaming type pouch 10 includes a sheet 20, a seal part 30, an opening 40 (see FIG. 6), a guide part 50, a steaming part 60, an outer passage part 90, and a whistle sound reducing part 100. 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 steaming type pouch 10 constituted by a sheet 20 having the layer structure of the first example.

  Each sheet 21 to 23 includes an outermost layer, an intermediate layer, and an innermost layer. An example of a method for producing each of the sheets 21 to 23 is dry lamination. The outermost layer is mainly excellent in gloss, printability and retort resistance. An example of the material constituting the outermost layer is a transparent material. An example of a transparent material is polyethylene terephthalate. The intermediate layer is mainly excellent in retort resistance, moisture resistance, and gas barrier properties. The intermediate layer includes a printing layer, a first adhesive layer, a stretched nylon layer, and a second adhesive layer. The printing layer is provided inside the outermost layer. In one example, a picture and a text for product description are printed on the outer surface of the printing layer. The first adhesive layer is provided inside the printing layer. The stretched nylon layer is provided inside the first adhesive layer. The second adhesive layer is provided inside the stretched nylon layer. An example of the material constituting each adhesive layer is a dry laminate adhesive. The innermost layer is excellent in retort resistance, heat sealability, and impact resistance. The innermost layer is provided inside the second adhesive layer. An example of the material constituting the innermost layer is unstretched polypropylene.

  The seal portion 30 joins the sheets 21 to 23 so that the sheets 21 to 23 are not separated. In one example, the seal portion 30 joins the innermost layer of the first sheet 21, the innermost layer of the second sheet 22, and the innermost layer of the bottom sheet 23. An example of a method for forming the seal portion 30 is heat sealing. The outer shape of the steaming type pouch 10 in front view can be arbitrarily selected. In the example shown in FIG. 1, the outer shape of the steaming type 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 communicates with the outside of the steaming type pouch 10. It is closed by the seal part 30 so as not to occur.

  The seal part 30 includes an upper seal part 31, a lower seal part 32, a first side seal part 33, and a second side seal part 34. The upper seal portion 31 closes the opening 40 (see FIG. 6). The upper seal portion 31 is provided above the inner portion 24 in the standard height direction. The lower seal portion 32 is provided below the inner portion 24 in the standard height direction. The first side seal portion 33 is provided on the right or left side of the inner portion 24 in the standard width direction. The second side seal part 34 is provided on the left or right side of the inner part 24 in the standard width direction.

  An inner edge 31A that is an edge on the inner portion 24 side in the upper seal portion 31, an inner edge 32A that is an edge on the inner portion 24 side in the lower seal portion 32, and an edge on the inner portion 24 side in the first side seal portion 33. An inner edge 33 </ b> A and an inner edge 34 </ b> A that is an edge on the inner portion 24 side of the second side seal portion 34 define an outline of the inner portion 24. An outer edge 31B which is an edge opposite to the inner edge 31A in the upper seal part 31, an outer edge 32B which is an edge opposite to the inner edge 32A in the lower seal part 32, and an opposite side to the inner edge 33A in the first side seal part 33 The outer edge 33 </ b> B that is the edge of the steam-permeable pouch 10 and the outer edge 34 </ b> B that is the edge opposite to the inner edge 34 </ b> A in the second side seal portion 34 define the outline of the fume-type 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 steaming-type pouch 10 are determined, for example, from the relationship between the amount of the contents C to be accommodated and the ease of carrying the steaming-type pouch 10. The width of the steaming type pouch 10 is the length between the outer edge 33B of the first side seal portion 33 and the outer edge 34B of the second side seal portion 34 in a line segment orthogonal to the standard height direction. When the width of the steaming type pouch 10 is different for each part, for example, the maximum width or the average of the widths of the plurality of parts represents the width of the steaming type pouch 10. According to an example, the width of the steaming type pouch 10 is 150 mm. The height of the steaming type pouch 10 is the length between the outer edge 31B of the upper seal portion 31 and the outer edge 32B of the lower seal portion 32 in a line segment orthogonal to the standard width direction. When the height of the steaming type 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 steaming type pouch 10. According to an example, the height of the steaming type pouch 10 is 145 mm.

  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-through pouch 10 shown in FIG. 1, the opening 40 is closed by an upper seal portion 31. The steaming type pouch 10 with the opening 40 closed (hereinafter sometimes referred to as the “steaming type 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 upper 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 unit 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 first side seal portion 33 and the second side 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 first side seal portion 33 and the second side seal portion 34.

  The steaming type 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 steaming type pouch 10 is heated. Since the storage space 10 </ b> C is closed by the seal portion 30 in the closed steam-permeable pouch 10, the pressure in the storage space 10 </ b> C increases with the generation of water vapor. The steaming section 60 is configured to open as the pressure in the storage space 10C increases, and to allow the water vapor in the storage space 10C to be discharged to the outside of the steaming type 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 location where the vapor passing section 60 is provided can be arbitrarily selected. In the first example, the vapor passing section 60 is provided in the first side seal portion 33 or the second side seal portion 34. In the second example, the vapor passing section 60 is provided in the first side seal portion 33 and the second side seal portion 34. FIG. 1 shows a first example in which the vapor passing section 60 is provided only in the second side seal section 34.

  FIG. 2 is an enlarged view of the steaming section 60 and its surroundings. The shape of the vapor passing section 60 is a shape that is recessed inward from the outside in the standard width direction. The vapor passing part 60 is formed in the middle of the second side seal part 34. The second side seal part 34 is divided into an upper part 35 that is a part on the opening 40 side and a lower part 36 that is a part on the bottom sheet 23 side by the steaming part 60. The vapor passing part 60 includes a tip part 70 and a connection part 80. The tip 70 is a portion that hits the bottom of the concave shape. The front end portion 70 is provided at a location where a strong stress concentration occurs when the pressure in the accommodation space 10 </ b> C of the sheets 21 and 22 increases. The connection part 80 is a part which hits a concave side part. The connection unit 80 includes a first connection unit 81 and a second connection unit 82. The first connection part 81 is a part that connects the upper part 35 and the tip part 70 in the second side seal part 34. The second connecting portion 82 is a portion that connects the lower portion 36 and the tip portion 70 in the second side seal portion 34. The first connection part 81 includes a peeling restriction part 81A and a relay part 81B. The peeling regulating portion 81A is connected to the tip portion 70. The exfoliation restricting portion 81A is configured to restrict the exfoliation of the steaming portion 60 that proceeds from the tip end portion 70 side to the second side seal portion 34 side. The relay part 81 </ b> B connects the peeling restricting part 81 </ b> A and the upper part 35 of the second side seal part 34. The peeling restricting portion 81A and the relay portion 81B have a bent shape.

  The seal width XA of the peeling restricting portion 81A becomes wider from the distal end portion 70 side toward the second side seal portion 34 side. It is preferable that the maximum seal width XA of the peeling restricting portion 81 </ b> A is determined according to the maximum internal pressure of the steaming type pouch 10. The maximum internal pressure of the fume-type pouch 10 is predicted to be reached among the internal pressures of the fume-type pouch 10 that can be increased by heating the fume-type pouch 10 under certain conditions. High internal pressure. In one example, even when the internal pressure of the steaming-type pouch 10 reaches the maximum internal pressure, the portion on the second side seal part 34 side of the steaming part 60 relative to the peeling regulation part 81A does not peel. The maximum seal width XA of the peeling restricting portion 81A is determined. In one example, the seal width XA is a dimension of a perpendicular line extending from the inner edge 81AB of the peeling restricting portion 81A to the outer edge 81AA. The second connection portion 82 extends in the standard width direction of the steaming type pouch 10. The seal width XB of the second connection portion 82 is constant. The seal width XB is a dimension of a perpendicular line dropped from the outer edge 82A of the second connection portion 82 to the inner edge 82B.

  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 portion 70 of the steaming section 60 are peeled off as the accommodation space 10C rises, and as shown in FIG. A steam vent passage 71 communicating with the outside of the steaming type pouch 10 is formed in the steaming section 60. The range in which the steaming part 60 peels differs depending on the magnitude of the pressure in the accommodation space 10C. In a typical example, the steaming part 60 peels as follows. The entire tip 70 is peeled off. The first connecting portion 81 peels to the bent portion where the separation regulating portion 81A and the relay portion 81B are connected. The entire second connection portion 82 is peeled off. When the pressure in the accommodation space 10C is high, at least a part of the relay portion 81B may be peeled off. The passage area of the steam release passage 71 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 10C passes through the steam release passage 71 and is discharged to the outside of the storage space 10C.

  The outer passage portion 90 is provided outside the steaming portion 60 in each of the sheets 21 and 22 so that the water vapor discharged through the steam vent passage 71 and discharged to the outside of the accommodation space 10C can flow. The water vapor discharged to the outside of the storage space 10 </ b> C passes through the outer passage portion 90 and is discharged to the outside of the steaming type pouch 10. By discharging the water vapor, an increase in the pressure of the accommodation space 10C is suppressed, and the rupture of the steam-permeable pouch 10 is avoided.

  The whistle sound reducing unit 100 is provided in the outer passage unit 90 so that the generation of whistle noise is suppressed when water vapor passes through the steam vent passage 71 and the outer passage unit 90 and is discharged to the outside of the steaming type pouch 10. This is a portion where a part of the first sheet 21 and a part of the second sheet 22 are joined. A whistle sound is a sound having a high frequency, and can be compared to a sound generated when boiling water using a kettle with a whistle. The whistle reduction unit 100 can take various forms of joining. In the first example, the whistle sound reducing unit 100 is a part in which a part of the innermost layer of the first sheet 21 and a part of the innermost layer of the second sheet 22 are joined by heat sealing. In the second example, the whistle reduction unit 100 is a part in which a part of the innermost layer of the first sheet 21 and a part of the innermost layer of the second sheet 22 are joined by an adhesive. The whistle sound reduction unit 100 can take various shapes. Examples thereof are a triangle, a square, a rectangle, a pentagon or more polygon, and an ellipse. The number of whistle sound reduction portions 100 formed in the outer passage portion 90 is one or more. The whistle noise reduction unit 100 is configured such that a narrow passage is not formed in the outer passage portion 90 when the steam passage portion 60 is deformed as the pressure in the accommodation space 10C increases. The formation location of the whistle sound reduction unit 100 in the outer passage portion 90 can be arbitrarily set. In the first example, the whistle sound reducing unit 100 is provided on the outer edge 34B side of the second side seal part 34 with respect to an imaginary line XO obtained by extending the inner edge 34A of the second side seal part 34 in the standard height direction. In the second example, the whistle sound reduction unit 100 is provided on the distal end portion 70 side with respect to the virtual line XO. 1 to 6 show a first example.

  The dimension of the outer passage portion 90 in the standard height direction (hereinafter referred to as “first dimension HA”) is determined from the relationship between the difficulty of generating whistle noise and the difficulty of entering foreign matter into the accommodation space 10C. Is preferred. The first dimension HA is a dimension of the edge 90A of the outer passage portion 90 in the standard height direction. An example of a preferable upper limit of the first dimension HA is 21 mm. An example of a more preferable upper limit of the first dimension HA is 18 mm. An example of a preferable lower limit of the first dimension HA is 9 mm. An example of a more preferable lower limit of the first dimension HA is 12 mm. An example of a preferable range for the first dimension HA is 9 mm to 21 mm. An example of a more preferable range for the first dimension HA is 12 mm to 18 mm. An example of a preferred first dimension HA is 15 mm. When the first dimension HA is included in the range of 12 mm or more, whistle noise is unlikely to occur when water vapor passes through the vapor vent passage 71 and the outer passage portion 90 and is discharged to the outside of the steaming type pouch 10. When the first dimension HA is included in the range of 18 mm or less, the foreign matter is less likely to enter the housing space 10C.

  The dimension of the outer passage portion 90 in the standard width direction (hereinafter referred to as “second dimension HB”) is preferably determined from the relationship between the difficulty of generating whistle noise and the volume of the accommodating space 10C. The second dimension HB is a dimension of the edge 90A of the outer passage portion 90 in the standard width direction. An example of a preferable upper limit of the second dimension HB is 24 mm. A more preferable example of the upper limit of the second dimension HB is 21 mm. An example of a preferable lower limit of the second dimension HB is 9 mm. An example of a more preferable lower limit of the second dimension HB is 12 mm. An example of a preferable range for the second dimension HB is 9 mm to 24 mm. An example of a more preferable range for the second dimension HB is 12 mm to 21 mm. An example of a preferable second dimension HB is 15 mm. When the second dimension HB is included in the range of 12 mm or more, whistle noise is unlikely to occur when water vapor passes through the steam vent passage 71 and the outer passage portion 90 and is discharged to the outside of the steaming type pouch 10. When the second dimension HB is included in the range of 21 mm or less, the accommodation space 10 </ b> C having a volume suitable for accommodation of the contents C can be easily formed in the standard-sized steaming type pouch 10.

  FIG. 3 shows a steaming type pouch 10 before the opening 40 is closed (hereinafter sometimes referred to as “a steaming type pouch 10 before closing”). The contents C (see FIG. 1) are put into the accommodation space 10C from the opening 40 of the steam-permeable pouch 10 before closing. Heat sealing is performed on the scheduled seal portion 110 where the formation of the upper seal portion 31 is scheduled after the contents C are charged, whereby the upper seal portion 31 is formed, and the steaming after closing shown in FIG. A mold pouch 10 is obtained.

With reference to FIG. 5 and FIG. 6, an example of how to use the steaming type pouch 10 will be described.
The closed pouch 1 is disposed in heating means (not shown) such as a microwave oven and is heated by the heating means. After the heating is finished, the pouch 1 is carried by the user as shown in FIG. Next, as shown in FIG. 6, each sheet 21, 22 is torn from the leading end of the notch 52, and the force is applied to each sheet 21, 22 so that the tear of each sheet 21, 22 proceeds along the tear line 51. Is applied. The entire opening 40 is opened by separating the scheduled separation portion 10B from the pouch body 10A. Next, the contents C are taken out of the steaming type pouch 10 through the opening 40.

The operation of the steaming type pouch 10 will be described.
Steam is generated from the contents C by heating the closed steam-through pouch 10 by the heating means. When the pressure in the storage space 10C rises to a pressure within a predetermined pressure range, the first sheet 21 and the second sheet 22 joined at the distal end portion 70 and the connection portions 81 and 82 are separated, and FIG. As shown in the figure, a steam vent passage 71 that connects the accommodation space 10 </ b> C and the outer passage portion 90 is formed in the steam passage portion 60. When the steaming section 60 is opened, the water vapor in the storage space 10 </ b> C passes through the steam vent passage 71 and the outer passage section 90 and is discharged to the outside of the steaming type pouch 10. Since the whistle sound reducing unit 100 is provided in the outer passage portion 90, the generation of the whistle sound is suppressed when water vapor is discharged to the outside of the steaming type pouch 10.

(Example)
The inventor of the present application conducted a test for confirming the relationship between the configuration of the outer passage portion 90 and the whistle sound reduction portion 100 and the steaming performance and silent performance of the steaming type pouch 10 using the samples of the example and the comparative example. . FIG. 7 shows the test conditions of the comparative example and the example regarding the test. 8 to 10 show the results of the 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. The sample of the example is a steaming type pouch 10 according to the embodiment. The sample of the comparative example is a steaming type pouch 10 having a configuration different from that of the steaming type pouch 10 of the example. The steaming type pouch 10 of each comparative example is different from the steaming type pouch 10 of the example in that the whistle noise reduction unit 100 is not provided, and has the same configuration as the steaming type pouch 10 of the example in other points. Prepare.

  The specifications regarding the sample of each example and each comparative example are as follows. The material constituting the outermost layer of each sheet 21 to 23 is polyethylene terephthalate. The thickness of the outermost layer is 12 μm. The material constituting the intermediate layer of each sheet 21 to 23 is nylon. The thickness of the intermediate layer is 15 μm. The material constituting the innermost layer of each sheet 21 to 23 is linear low density polyethylene. The thickness of the innermost layer is 60 μm. The width of the steaming type pouch 10 is 150 mm. The height of the steaming type pouch 10 is 145 mm. The number of whistle sound reduction units 100 provided in the outer passage unit 90 is one. The position where the whistle noise reduction unit 100 is provided in the outer passage portion 90 is the outer edge 34B side (hereinafter referred to as “outer side”) of the second side seal portion 34 with respect to the virtual line XO, or the tip portion with respect to the virtual line XO. 70 side (hereinafter referred to as “inside”).

  For evaluation of the steaming performance, when the steaming type pouch 10 after being closed is heated by a heating means, only the steaming part 60 of the sealing part 30 and the steaming part 60 is peeled off, and the inner edge of the sealing part 30 is It was visually confirmed whether or not water vapor was discharged from the storage space 10C to the outside of the steaming type pouch 10 without retreating. The state where the seal part 30 is not retracted refers to a position where the positions of the inner edges 31A to 34A after heating are substantially the same as the positions of the inner edges 31A to 34A before heating. When only the steaming part 60 is peeled off and the water vapor is discharged, it is evaluated that the water vapor is discharged properly, and when a part of the seal part 30 is peeled off and the water vapor is discharged, the water vapor is discharged properly. Not evaluated. In order to evaluate the silent performance, whether or not the whistle sound was generated when water vapor was discharged to the outside of the steaming type pouch 10 was confirmed. The number of trials is 5 times. Content C is water. The weight of the contents C is 100 g. The output of the microwave oven is 1000W. The heating time of the microwave oven is 1 minute. In FIG. 8 to FIG. 10, “◯” in the item of the steaming performance indicates a case where only the steaming part 60 is peeled off and the water vapor is discharged, and “×” is a part of the seal part 30 peeled off and water vapor is removed. The case where it was discharged is shown. In FIG. 8 to FIG. 10, “◯” in the item of the silent performance indicates a case where the generation of the whistle sound is suppressed when the water vapor is discharged, and “X” indicates that the whistle sound is generated when the water vapor is discharged. Shows the case. The case where the generation of the whistle sound is suppressed refers to the case where the whistle sound cannot be heard and the case where the whistle sound can be heard but is sufficiently smaller than the whistle sound generated in the conventional normal pouch.

  According to the pouch of the example, it was confirmed that the generation of whistle noise is suppressed when water vapor is discharged to the outside of the steaming type pouch 10. In addition, it was confirmed that the generation of the whistle sound is further suppressed when the whistle sound reduction unit 100 is provided outside the virtual line XO.

(Modification)
The description regarding the said embodiment is an illustration of the form which the steaming type | mold pouch regarding this invention can take, It is not intending restrict | limiting the form. The steaming-type pouch according to the present invention can take, for example, a combination of the following modification example of the above-described embodiment and at least two modification examples not inconsistent with each other.

  -The structure of the vapor transmission part 60 and the outer side channel | path part 90 can be changed arbitrarily. FIG. 11 is an example of a modification of the steaming section 60 and the outer passage section 90. The vapor passing 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 second side 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. The outer passage portion 90 has a shape corresponding to the concave shape of the vapor passage portion 60. When the pressure of the accommodation space 10C rises by heating the steaming type pouch 10 including the steaming part 60 and the outer passage part 90 of the modification, for example, the peeling of the steaming part 60 proceeds from the second corner part 60E. Then, when the steaming section 60 is opened, the water vapor in the storage space 10 </ b> C is discharged to the outside of the steaming type pouch 10. Since the whistle sound reducing unit 100 is provided in the outer passage portion 90, the generation of the whistle sound is suppressed when water vapor is discharged to the outside of the steaming type pouch 10.

DESCRIPTION OF SYMBOLS 10: Steaming type pouch 10C: Accommodating space 20: Sheet 21: 1st sheet 22: 2nd sheet 30: Seal part 34: 2nd side part seal part (side part seal part)
60: Steaming section 90: Outer passage section 100: Flute sound reduction section C: Contents HA: First dimension HB: Second dimension

Claims (10)

A sheet including the first sheet and the second sheet superimposed;
A seal portion that joins the first sheet and the second sheet such that a storage space for storing contents is formed between the first sheet and the second sheet;
A steaming part that is part of the seal part and configured to peel off as the pressure in the housing space increases;
An outer passage part provided outside the steaming part in the sheet so that steam discharged through the peeled steaming part and discharged to the outside of the housing space can be circulated;
One part of the first sheet and one of the second sheets in the outer passage portion are suppressed so that the generation of whistle noise is suppressed when water vapor passes through the steaming portion and is discharged to the outside of the housing space. A steaming type pouch provided with a whistle noise reduction part that joins the part. The steaming type pouch according to claim 1, wherein the whistle noise reduction unit is configured by sealing a part of the first sheet and a part of the second sheet. 3. The steaming type according to claim 1, wherein the whistle noise reduction unit is configured such that a narrow passage is not formed in the outer passage portion when the seal portion is deformed with an increase in pressure in the accommodation space. Pouch. The seal part includes a side seal part formed along the side of the sheet,
The steaming part is connected to the side seal part,
The said whistle sound reduction part is provided in the outer edge side of the said side part seal part with respect to the virtual line which extended the inner edge of the said side part seal part which prescribes | regulates the outline of the said accommodation space. The steaming type pouch according to one item. The first dimension, which is a dimension of the outer passage portion in a first direction along the side of the sheet, is determined so as to contribute to suppression of the generation of the whistle sound. Steamed pouch. The steaming type pouch according to claim 5, wherein the first dimension is 12 mm or more. The steaming type pouch according to claim 5 or 6, wherein the first dimension is 18 mm or less. The second dimension, which is the dimension of the outer passage portion in the second direction orthogonal to the side of the sheet, is determined so as to contribute to the suppression of the generation of the whistle sound. The described steaming type pouch. The steaming type pouch according to claim 8, wherein the second dimension is 12 mm or more. The steaming type pouch according to claim 8 or 9, wherein the second dimension is 24 mm or less.