JP6565135B2 - Pouch with steam vent seal - Google Patents

Description

  The present invention relates to a pouch with a steam release seal that can be used in a microwave oven, and more particularly to a structure of a steam release seal.

As this type of conventional pouch with a steam release seal, for example, the one described in Patent Document 1 is known. That is, a steam vent seal portion partially provided with a steam vent hole is provided in a part of the pouch body made of film. When the contents filled and sealed in the pouch main body are heated and the internal pressure rises, a part of the steam vent seal portion is broken, and the steam escapes from the steam vent hole to the outside.
When the steam vent faces the contents, the contents spout out when the steam escapes, so in the microwave oven, the position of the steam vent seal is positioned higher than the contents. .

JP 2005-187079 A JP 2007-137478 A

  However, even if the steam vent seal is located higher than the contents, the contents may adhere to the vicinity of the steam vent seal, and when the steam escapes, the contents spout from the steam vent. Or there is a risk of leakage. In view of this, various structures have been proposed in which an unsealed portion is provided at the periphery of the vapor vent hole and the leakage of contents is prevented by the unsealed portion (see, for example, Patent Document 2).

  However, in order to reliably prevent leakage at the unsealed portion, it is sufficient to increase the length of the unsealed portion from the steam vent seal portion to the steam vent hole. There is a possibility that the film of the seal portion is in close contact and clogged. In order to prevent clogging, it is better that the length of the unsealed portion is short, and it is difficult to adjust the length.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a pouch with a steam vent seal that can reliably vent steam and prevent leakage of contents. There is to do.

To achieve the above object, the present invention provides a steam vent seal pouch provided with a steam vent seal portion provided with a steam vent hole in a film pouch body.
An unsealed portion is provided at the periphery of the vapor vent hole, and a blocking prevention portion is provided at the unsealed portion,
The blocking prevention part is provided partially in the unsealed part between the storage part center side of the steam release seal part and the steam release hole,
The clogging prevention portion has a clogging prevention member having a thickness of 1 mm or more , and a gap extending between the storage portion center side of the vapor vent seal portion and the vapor vent hole is formed in the vicinity of both side edges of the blockage prevention member. It is characterized by.
Another invention is a pouch with a steam vent seal provided with a steam vent seal portion provided with a steam vent hole in a film-made pouch body.
An unsealed portion is provided at the periphery of the vapor vent hole, and a blocking prevention portion is provided at the unsealed portion,
The blocking prevention part is provided partially in the unsealed part between the storage part center side of the steam release seal part and the steam release hole,
The blockage preventing portion has an overhang forming portion, and a gap extending between the center side of the storage portion of the vapor vent seal portion and the vapor vent hole is formed by the overhang forming portion .

The present invention can be configured as follows.
1 . The blocking prevention member has a through hole.
2 . The blocking preventing member is fixed to the film.
3 . The length of the unsealed portion from the initial breaking position of the steam vent seal portion to the steam vent hole is set to 3 mm or more.

  According to the pouch with a steam release seal of the present invention, steam can be reliably vented when the contents are heated, and leakage of the contents can be reliably prevented.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a steam release pouch according to a first embodiment of the present invention, wherein (A) is a diagram showing an overall configuration, (B) is an enlarged view of a steam release seal portion, and (C) is an enlarged cross section of an overhang forming portion. (D) is a figure which shows the state from which vapor | steam escapes. The 2nd Embodiment of the steam venting seal part of the steam venting pouch of this invention is shown, (A) is a figure of the form provided with the obstruction | occlusion prevention member which has a through-hole in a non-seal, (B) is a figure of (A). An expanded sectional view, (C) is a figure of the form provided with a plate-shaped blockade prevention member, and (D) is an expanded sectional view of (C). The other example which concerns on 1st, 2nd embodiment of this invention is shown, (A) thru | or (C) is a figure which shows the form of a square-shaped vapor vent seal part.

Embodiments of the present invention will be described below in detail with reference to the drawings.
FIG. 1 shows a pouch with a steam release seal according to a first embodiment of the present invention, which is provided with an overhang forming portion as a blocking prevention portion.
This pouch 1 with a steam release seal is a steam release hole for releasing pressure so that the pouch body 3 made of a film is filled and sealed with the contents and can be heated as it is in a microwave oven or the like. A steam vent seal 12 with 10 is provided.
The pouch body 3 is configured by sealing the peripheral edges of a pair of square front film 2 and rear film 4 by heat welding to form a storage portion 5, and both side edges of the pouch body 3 have a pair of side seal portions 61, 61. The top edge is sealed by the top seal portion 62 and the bottom edge is sealed by the bottom seal portion 63.

The steam release seal portion 12 is provided independently at the upper corner portion of the side seal portion 61 and the top seal portion 62, and the unsealed portion 14 is provided at the periphery of the steam release hole 10 of the steam release seal portion 12. The unsealed portion 14 is provided with an overhang forming portion 20 as a blockage preventing portion.
In this example, the shape of the steam vent seal portion 12 is an elliptical shape whose major axis is substantially parallel to the side seal portion 61, and the steam vent hole 10 is at one end of the major axis of the ellipse, in the illustrated example, the upper side of the pouch body 3. Is provided at a position biased toward the top seal portion 62 side.

The breakage of the steam release seal portion 12 is caused by the pouch body 3 inflating due to the vapor pressure and being peeled off by the force that separates the front film 2 and the rear film 4, so that the initial breakage position starts at a portion near the center of the storage portion. In the illustrated example, as shown in FIGS. 1A and 1D, on the line connecting the corner and the storage unit center O, it begins to peel from the side close to the storage unit center O and opens partially.
The steam vent 10 is preferably located as far as possible from the initial breaking position B from the viewpoint of preventing ejection of contents and preventing leakage. In this embodiment, in the elliptical region surrounded by the steam vent seal portion 12, It is provided at a position biased to the end of the long shaft on the top seal portion 62 side. The distance of the unsealed portion 14 from the initial breaking position B to the vapor vent hole 10 is preferably 3 mm or more for preventing leakage.

As shown in FIGS. 1C and 1D, the unsealed portion 14 is surrounded by the steam vent seal portion 12 and includes a front unsealed portion 14A excluding the steam vent hole 10 and a rear unsealed portion 14B. A gap g is formed between the unsealed portions 14A and 14B of the front surface and the rear surface by an overhang forming portion 20 partially protruding outward. The overhang forming portion 20 has an arrow blade shape that extends linearly in a plan view, the tip portion 22 has a V-shaped shape toward the tip, and the rear end portion 24 has a V-shaped shape, Side edges 26 and 26 connecting the left and right ends of the front end portion 22 and the rear end portion 24 are parallel lines.

The ridge line 28 connecting the corner 22a of the front end portion 22 and the corner 24a of the rear end portion 24 is a mountain fold, the front end portion 22 and the rear end portion 24, and the right and left side edges 26 and 26 are valley folds. A three-dimensional overhang shape is formed (see FIG. 1C). In addition, the cross-sectional shape of the overhang forming portion may be a mountain (triangular) shape, a square shape, or an arc shape, and is not particularly limited.
The mountain-folded ridge line 28 of the overhang forming portion 20 is formed in accordance with the long axis of the ellipse, the rear end portion 24 is disposed facing the vapor vent hole 10, and the tip portion 22 is the initial stage of the vapor vent seal portion 12. It is arranged near the breaking position B. The initial breaking position B is at a position on the storage unit center O side with respect to the major axis of the ellipse.
In addition, in this embodiment, although the overhang | projection shaping | molding part 20 is formed in both the front film 2 and the rear film 4, it should just exist in at least one.

Next, the operation of the pouch with a steam release seal according to the present embodiment will be described.
The pouch 1 with a steam vent seal is filled and sealed with the contents W, and when put into the microwave oven, the steam vent seal portion 12 is positioned higher than the liquid level of the contents. Is appropriately disposed by a method such as using a pedestal.
As shown in FIGS. 1 (C) and 1 (D), steam is removed from the front and rear unsealed portions from the broken opening 10b as shown in FIGS. 1 (C) and 1 (D). While expanding 14A and 14B, it penetrates into the gap g of the overhang forming part 20 and pushes the gap g wide. The overhang forming portion 20 is bent in a mountain shape along the ridge line 28 to form a cylindrical passage, so that the steam reliably reaches the rear end portion 24 without causing a blocking point. Then, the steam passes from the rear end portion 24 to the steam vent 10 while passing through the front and rear unsealed portions 14A and 14B while spreading.
At this time, when the distance from the initial fracture position B to the front end portion 22 of the overhang forming portion and the distance from the rear end portion 24 of the overhang forming portion to the vapor vent hole 10 are 0.5 to 1 mm, respectively, blocking prevention is achieved. And preferred for leakage of contents.
Moreover, it is preferable to arrange the overhang forming part 20 at the center of both sides of the steam release seal part 12. The both sides of the steam release seal portion 12 are the seal portions located on the left and right sides with respect to the overhang forming portion 20, and the center is the seal portion located on both the left and right sides in the direction perpendicular to the overhang molding portion 20. Meaning of the center of the interval.

At this time, when the contents adhere to the vicinity of the steam vent seal portion 12, the adhering matter C enters the unsealed portion 14 through the opening 10b broken together with the steam, but between the front and rear unsealed portions 14A and 14B. In other words, it is captured by the gap g of the overhang forming part 20 and does not reach the vapor vent hole 10 and does not leak out.
In particular, in this embodiment, the position of the steam vent hole 10 in the region surrounded by the steam vent seal portion 12 is provided at a position offset from the initial fracture position B as viewed from the storage portion center O. The distance from the opening 10b at the time of the initial fracture of the unsealed portion 14 to the vapor vent hole 10 is long, and the deposit C can be reliably prevented from leaking from the vapor vent hole 10.

Next, a second embodiment of the present invention provided with a blocking prevention member as the blocking prevention unit will be described.
In the following embodiments, only the parts different from the first embodiment will be mainly described, and the same components are denoted by the same reference numerals and the description thereof is omitted.

FIGS. 2A and 2B show a steam vent seal portion of a pouch with a steam vent seal according to the second embodiment of the present invention.
This embodiment is an example in which the blockage preventing portion is configured such that a blockage preventing member 30 having a through hole 32 is interposed between the front and rear unsealed portions 14A and 14B of the unsealed portion 14. In this example, the blocking prevention member 30 is a tubular member that extends linearly along the long axis of the ellipse surrounded by the steam release seal portion 12, the length of which is shorter than the length of the unsealed portion 14, and one end is steam. The other end is up to a predetermined dimension before the hole edge of the steam vent hole 10 until the predetermined dimension of the inner edge of the punching seal portion 12.

  One end of the blockage preventing member 30 may be fixed to the steam vent seal portion 12, but the steam vent seal portion 12 needs to be sealed without a gap. Therefore, in consideration of workability and prevention of blockage, the steam vent seal portion It is preferable to keep the distance from 12 to 0.5 to 1 mm. Further, it is preferable that the blocking prevention member 30 be separated from the through hole 32 by 0.5 to 1 mm so as not to block the air permeability.

The blocking prevention member 30 is preferably fixed so as not to move by welding or adhesion to at least one inner surface of the front and rear unsealed portions 14A and 14B. Preferably, the blocking prevention member 30 is preferably disposed and fixed at the center of both sides of the vapor vent seal portion 12. The both sides of the steam release seal portion 12 are the seal portions located on the left and right sides with respect to the blockage prevention member 30, and the center is the distance between the seal portions located on both the left and right sides in the direction perpendicular to the blockage prevention member 30. The central meaning.
Thus, by interposing the blocking prevention member 30, not only the through-hole 32 of the blocking prevention member 30 itself, but also in the vicinity of both side edges of the blocking prevention member 30, there is a gap between the front and rear unsealed portions 14A and 14B. g is generated, and the steam is surely discharged through the gap g together with the through hole 32.

  The hole diameter of the through hole 32 is preferably set to φ1 mm or more. Further, when the gap g on both side edges of the blocking prevention member 30 is blocked and does not vent, a hole diameter of 2 mm or more is preferable.

FIGS. 2C and 2D are examples of a plate-like blocking prevention member 40 having no through hole.
Even when there is no through hole, a gap g is formed between the front and rear unsealed portions 14A and the film piece 14B in the vicinity of both side edges of the blocking prevention member 40, and the steam is released through the gap g. The thickness of the blocking prevention member 40 is preferably set to 1 mm or more.
Similarly to the blocking prevention member 30, the blocking prevention member 40 is fixed to the inner surface of at least one of the front and rear unsealed portions 14A and 14B so as not to move by adhesion or adhesion. It is preferable to arrange and fix. The both sides of the steam release seal portion 12 are the seal portions located on the left and right sides with respect to the blockage prevention member 30, and the center is the interval between the seal portions located on both the left and right sides in the direction perpendicular to the closure prevention member 40. The central meaning.

In both the first and second embodiments described above, the shape of the steam release seal portion 12 is an elliptical shape, but the shape is not limited to an elliptical shape, and may be various shapes.
For example, the example shown in FIG. 3A is a modification of the first embodiment, in which the steam release seal portion 120 has a vertically long rectangular shape along the side seal portion 61 and is parallel to the side seal portion 61. It has side parts 121, 122 and a pair of upper and lower side parts 123, 124 perpendicular to the side seal part 61, and the vertical side part 121 on the side seal part 61 side is integrated with the side seal part 61. This is an example. Moreover, the steam vent 10a is not a round hole but a slit.

In this case, the initial breaking position B is the portion closest to the storage portion center O (see FIG. 1A) where the bulge is the largest, in the drawing, the lower side portion 124 and the inner side portion 122. And near the corner. On the other hand, the steam vent hole 10a is located near the upper lateral side portion 123 far from the initial fracture position B, and the overhang forming portion 20 is located between the lower lateral side portion 124 and the steam vent hole 10a. In addition, the vertical sides 121 and 122 are formed in parallel.
Also in this case, the steam is ruptured from the initial rupture position B of the steam release seal portion 120 by the steam pressure, and the steam that has entered the unsealed portion 14 from the ruptured opening 10b as shown in FIG. Passing through the part 20, the steam reaches the steam vent 10 a without causing a blocking point, and the steam escapes.
At this time, when the contents are attached in the vicinity of the steam release seal portion 120, the attachment C is captured between the front and rear films of the unsealed portion 14 or in the gaps of the overhang forming portion 20 to release the steam. It does not reach the hole 10.
Also in the case of this rectangular steam vent seal portion 120, the blockage prevention portion is not limited to the overhang forming portion 20, but a blockage prevention member 30 having a through-hole 32 (see FIG. 3C), or not particularly illustrated. However, the plate-like blocking prevention member 40 shown in FIG. 2C can be used.

In each of the above-described embodiments, the vapor vent hole penetrates through two films, but it may be configured to penetrate at least one film.
Further, the pouch body 3 is not limited to the flat pouch by the four-side seal of the embodiment, and may be a standing pouch. Further, the position of the steam release seal is a position closer to the distance from the center O of the pouch storage part O to the side seal part 61, the top seal part 62, and the bottom seal part 63, and so long as it is not immersed in the contents. The positions such as are not particularly limited.

1 Pouch with steam release seal 2 Front film 4 Back film 3 Pouch body 5 Storage part
61 Side seal portion, 62 Top seal portion, 63 Bottom seal portion 10 Vapor vent hole 10a Vapor vent hole 10b Opening portion 12 Vapor vent seal portion 14 Unsealed portion, 14A Front unsealed portion, 14B Rear unsealed portion 20 Overhang molding Part 22 tip part, 22a corner, 24 rear end part, 24a square 26 side edge, 28 ridge line 30 blocking prevention member, 32 through hole 40 blocking prevention member B initial breaking position C deposit O storage part center, W contents, g Gap

Claims (5)

In a pouch with a steam vent seal provided with a steam vent seal portion provided with a steam vent hole in a film-made pouch body,
An unsealed portion is provided at the periphery of the vapor vent hole, and a blocking prevention portion is provided at the unsealed portion,
The blocking prevention part is provided partially in the unsealed part between the storage part center side of the steam release seal part and the steam release hole,
The clogging prevention portion has a clogging prevention member having a thickness of 1 mm or more, and a gap extending between the storage portion center side of the vapor vent seal portion and the vapor vent hole is formed in the vicinity of both side edges of the blockage prevention member. A pouch with a steam release seal, characterized by   The pouch with a steam release seal according to claim 1, wherein the blocking prevention member is provided with a through hole.   The pouch with a steam release seal according to claim 1 or 2, wherein the blocking prevention member is fixed to a film. In a pouch with a steam vent seal provided with a steam vent seal portion provided with a steam vent hole in a film-made pouch body,
An unsealed portion is provided at the periphery of the vapor vent hole, and a blocking prevention portion is provided at the unsealed portion,
The blocking prevention part is provided partially in the unsealed part between the storage part center side of the steam release seal part and the steam release hole,
The blockage preventing portion has an overhang forming portion, and the overhang forming portion forms a gap extending between the storage portion center side of the vapor vent seal portion and the vapor vent hole. Sealed pouch. 5. The pouch with a steam release seal according to claim 1, wherein an unsealed portion length from an initial breaking position of the steam release seal portion to a steam release hole is 3 mm or more.