JP2009012831A - Packaging bag - Google Patents

Abstract

The present invention provides a packaging bag that can be safely heated in a microwave oven after being opened and charged with food and the like.
In the present invention, four end portions of a front member 2 and a back member 3 are integrally joined, and an opening is formed by tearing a first end 4 which is one of the end portions. A packaging bag 1 that is provided on the inner surface of the front member 2 and the first zipper member 6 on the inner surface of the rear member 3 and engages with the first zipper member 6 so that the opening can be freely opened and closed. A second zipper member 8 and a sealing portion 11 provided on the second end 5 side opposite to the first end 4 from the first zipper member 6 and integrally joining the front member 2 and the back member 3 The steam hole 7 is provided on the first end 4 side of the sealing portion 11 and escapes the steam generated in the packaging bag 1.
[Selection] Figure 2

Description

  TECHNICAL FIELD The present invention relates to a packaging bag for putting food into an interior and cooking with a microwave oven together with a seasoning liquid filled in advance.

  Conventionally, so-called retort foods in which foods contained in packaging bags such as pouches are heated and sterilized in a retort kettle are widely distributed and used. Since the retort food is sealed by the packaging bag, if it is to be heated as it is in the microwave oven, the packaging bag may expand and burst due to water vapor generated from the food.

In order to solve this problem, there has been proposed a packaging bag in which the heat-resistant nonwoven fabric for escaping the above-mentioned water vapor is folded in two and attached to the inside of one side of the packaging bag (for example, patent document) 1). When heating retort food using this packaging bag in a microwave oven, cut off the end side where the non-woven fabric is attached, open the end on the non-woven fabric side, and then heat the food in the microwave oven together with the packaging bag To do.
Japanese Patent Laid-Open No. 8-80978

  However, since the open end of the packaging bag of Patent Document 1 is covered with a nonwoven fabric or the like, after opening the packaging bag of retort food filled with sauce or seasoning liquid and adding ingredients, Sauces and ingredients cannot be heated together in a range.

  If a well-known zipper that can be opened and closed is provided in the opening, it is possible to seal the packaging bag again by adding ingredients, but the opening with the zipper closed is poorly breathable and is heated in a microwave oven In this case, the risk of the above-mentioned explosion becomes a problem.

  This invention is made | formed in view of the said situation, and it aims at providing the packaging bag which can be heated with a microwave oven safely after opening once and throwing in foodstuffs.

  The packaging bag of the present invention is formed by integrally joining the four end portions of the front member and the back member, and opening the first end portion which is one of the end portions. A first zipper member provided on the inner surface of the front member, and a second zipper provided on the inner surface of the rear member and engaged with the first zipper member to seal the opening in an openable / closable manner. A member, a sealing portion provided on a second end side opposite to the first end portion from the first zipper member, and integrally joining the front member and the back member; A steam hole is provided on one end side and escapes steam generated in the packaging bag.

  The “inner surface” refers to the surfaces of the front member and the rear member that face each other inside the packaging bag.

  In the packaging bag of the present invention, the sealed state is ensured by the sealing portion before opening, and after opening, the steam is diffused from the steam hole while being sealed by the engagement between the first zipper member and the second zipper member.

  The steam hole may be provided in at least one between the first zipper member and the front member, or between the second zipper member and the back member. In this case, it is possible to configure a packaging bag in which the contents are not easily blown out from the steam hole.

  The back member includes a first folded portion folded back in a bellows shape, and a second folded portion folded back in a bellows shape apart from a fold line of the first folded portion, and the first folded portion and the Both ends in the direction of the fold line of the second folded portion may be integrally joined. In this case, the volume of the packaging bag can be increased by the first folded portion and the second folded portion rising substantially perpendicular to the front member.

  The sealing portion may be formed of a material in which one inner surface to be joined has an easy peel property with respect to the other inner surface. In this case, the sealing portion can be easily peeled off and opened. When the sealing portion is formed in a linear shape having a convex portion on the first end portion side, a force at the time of opening is easily applied, and the opening can be further facilitated.

  According to the packaging bag of the present invention, cooking can be performed safely in a microwave oven after being opened once and the ingredients are added.

Hereinafter, the packaging bag 1 of 1st Embodiment of this invention is demonstrated with reference to FIGS. 1-8.
FIG. 1 is a perspective view of the packaging bag 1. The packaging bag 1 is filled with seasoning liquid such as curry sauce as will be described later. The packaging bag 1 includes a front member 2 and a back member 3 joined to the front member 2.

As shown in FIG. 1, the front member 2 and the back member 3 are formed by integrally joining four end portions, and the first end portion 4 that is one of the four end portions is torn. Thus, an opening described later is formed.
In the following description, front, rear, left, and right are expressed as shown in FIG. 1 with the front member 2 as the front, the first end 4 as the upper end, and the second end 5 opposite to the first end 4. The state at the bottom is used as a reference.

The front member 2 is formed of a sheet-like flexible film (hereinafter referred to as “main body film”) having heat-fusibility.
The main film is made of polyester, nylon, polyethylene terephthalate, or a laminate of these layers and a base layer on which an inorganic compound such as aluminum oxide or silicon oxide is deposited, and a heat-fusible layer made of polypropylene (PP) or the like is laminated. Is formed.

  A first zipper member 6 made of PP or the like is provided on the inner surface of the front member 2 over the left-right direction (the length direction of the first end). The 1st zipper member 6 engages with the 2nd zipper member mentioned later, and seals the opening after opening so that opening and closing is possible.

  2A is a cross-sectional view taken along line AA in FIG. The surface of the first zipper member 6 that faces the front member 2 is intermittently sealed by means such as heat fusion in the longitudinal direction. And as shown in FIG. 2, the unsealed part provided between each seal | sticker is formed as the vapor | steam hole 7 which escapes a vapor | steam. The number and shape of the steam holes 7 can be arbitrarily set.

  2B is a cross-sectional view taken along line BB in FIG. The back member 3 is formed of a main body film similarly to the front member 2. On the inner surface of the back member 3, as shown in FIG. 2, a second zipper member 8 that engages with the first zipper member 6, a sealing member 9 that forms a sealing portion described later, and the inside of the packaging bag 1 A deployment unit 10 is provided that expands according to the situation and increases the volume.

  The second zipper member 8 is made of the same material as the first zipper member 6 and has shapes such as engagement protrusions and grooves that engage with the first zipper member 6. The 2nd zipper member 8 is being fixed to the back member 3 by means, such as heat sealing | fusion, via the connection member mentioned later.

  The sealing member 9 is a wide band-shaped member formed from a blend resin of PP and polyethylene. The sealing member 9 is connected to the back member 3 via a connecting member described later. The sealing member 9 is heat-sealed to the inner surface of the front member 2 on the second end 5 side of the first zipper member 6 of the front member 2. That is, the front member 2 and the back member 3 are integrally joined via the sealing member 9 and the connecting member, and a sealing portion 11 that seals the packaging bag 1 is formed at the location. Since the sealing member 9 has an easy peel property with respect to the main body film, the sealing member 9 is easily peeled off from the front member 2 by being pulled toward the inner surface side.

  The sealing portion 11 is formed in a linear shape by applying heat to the sealing member 9 in a linear shape. And as shown in FIG. 1, it has the some convex part 11A in the 1st edge part 4 side, and the 2nd edge part 5 side is formed as a curve.

  The connecting member 12 is a band-shaped member made of PP or the like. As shown in FIG. 2, the second zipper member 8 is fixed to one end of the connecting member 12 so that the first zipper member 6 and the second zipper member 8 can be engaged with each other. Further, it is joined to the inner surface of the back member 3 by means such as heat fusion. A surface of the sealing member 9 facing the back member 3 is fixed to the other end of the connecting member 12.

As shown in FIG. 1, a first notch 13 </ b> A is provided at the left and right ends below the first end 4 of the packaging bag 1 to trigger the first end 4. A second notch 13 </ b> B is provided at the left and right ends of the packaging bag 1 on the second end 5 side from the sealing portion 11 to trigger opening after cooking. Each notch 13A, 13B may be provided at either one of the left and right ends. Further, slits may be provided in place of the notches 13A and 13B.
In addition, a substantially semicircular grip seal portion 14 is provided at the left and right end portions on the second end portion 5 side of the second notch 13B so that the packaging bag 1 can be easily gripped at the time of serving.

  The unfolding portion 10 is provided between the lower end of the connecting member 12 and the second end portion 5, and as shown in FIG. 2, the first folded portion 15 on the first end portion 4 side and the second end portion. And a second folded portion 16 on the 5 side. The folded portions 15 and 16 are formed by being folded back and forth in a so-called bellows shape alternately once before and after the folding line so as to be substantially parallel to the first end portion 4 and the second end portion 5. That is, the 1st folding | turning part 15 and the 2nd folding | turning part 16 are provided so that each folding line may become substantially parallel. The number of times of folding of the folding sections 15 and 16 may be set as appropriate.

  Each folded-back portion 15, 16 is formed with a first projecting portion 15 </ b> A and a second projecting portion 16 </ b> A that project rearward from the first end portion 4 by a folding line. And the bottom face part 17 used as the bottom face at the time of use of the packaging bag 1 mentioned later is formed between 15 A of 1st protrusion parts, and the 2nd protrusion part 16A.

The manufacturing procedure of the packaging bag 1 configured as described above will be described.
FIG. 3 is a perspective view showing the front member 2. The front member 2 has the first zipper member 6 fixed to the inner surface with the heat-fusible layer as the inner surface so that the front member 2 can be heat-sealed. The first zipper member 6 is intermittently sealed to the front member 2, and a steam hole 7 is formed.

  FIG. 4 is a perspective view showing the back member 3. Similarly to the front member 2, the back member 3 is also folded at four folding lines 18 with the heat-fusible layer as the inner surface, and has a first folded portion 15, a second folded portion 16, and a bottom portion 17. Is formed. And the edge part of the side to which the 2nd zipper member 8 of the connection member 12 was fixed is fixed to an inner surface.

  As shown in FIG. 5, the front member 2 and the back member 3 are overlapped with the inner surfaces facing each other, and the left and right end portions, the first end portion 4, and the grip seal portion 14 (not shown) are heat-sealed. Join together. At the same time, the sealing member 9 is fused by applying heat to the sealing member 9 in a linear shape having the convex portions 11A (not shown) as described above, thereby forming the sealing portion 11 (not shown).

Further, the left and right end portions of the first protrusion portion 15 </ b> A and the second protrusion portion 16 </ b> A are joined integrally with the left and right end portions of the other portions of the back member 3.
At this time, since the base material layers of the other parts of the back member 3 and the projecting portions 15A and 16A are opposed to each other, the base material layers are partially removed by punching or the like, and the heat fusion of the mutual parts Joining is performed by a so-called point seal 19 as shown in FIG. 1 in which the adhesive layer is exposed and fused.

  After filling the seasoning liquid A with the second end portion 5 not joined as a filling port and then sealing the second end portion 5 by heat fusion or the like, the packaging bag 1 is as shown in FIG. Complete.

  The completed packaging bag 1 was evaluated for each item of compression resistance strength, drop strength, and appearance according to JIS-Z-0238 “Testing method for sealed soft packaging bag”. The results are shown in Table 1.

  As shown in Table 1, in the packaging bag 1, it was confirmed that favorable performance was ensured.

  Next, the operation when using the packaging bag 1 will be described. First, when the user tears the first end 4 in the left-right direction from the first notch 13A, an opening 20 is formed in the upper portion of the packaging bag 1 as shown in FIG.

  The opening 20 is sealed by the first zipper member 6 and the second zipper member 8 engaged with each other. As shown in FIG. 8, the user releases the engagement between the first zipper member 6 and the second zipper member 8 to widen and open the opening 20.

  At the same time, the sealing portion 11 on the sealing member 9 connected to the second zipper member 8 via the connecting member 12 is peeled from the front member 2 because it has an easy peel property. At this time, the force that separates the front member 2 and the back member 3 applied to the packaging bag 1 along with the opening operation concentrates on the convex portion 11 </ b> A of the sealing portion 11. For this reason, force can act on the sealing part 11 efficiently and can open easily.

  As shown in FIG. 8, the user inserts food F such as potatoes and carrots into the packaging bag 1 through the opening 20, and engages the first zipper member 6 and the second zipper member 8 as shown in FIG. Let it seal. At this time, the weight of the contents of the packaging bag 1 increases due to the introduction of the food material F, and the first folded portion 15 and the second folded portion 16 extend so as to rise substantially perpendicularly to the front member 2 to expand the developed portion. 10 expands in a box shape. At the same time, the seasoning liquid A and the food material F move to the developing unit 10. The shape of the deployment part 10 is held by the above-described point seal 19 applied to the first projecting part 15A and the second projecting part 16A.

  Further, as the developing unit 10 expands in a box shape, the region on the first end 4 side from the first folded portion 15 rises upward, and the end of the connecting member 12 on the sealing member 9 side However, it extends above the deployment portion 10 at a certain angle with the back member 3.

  Then, if the packaging bag 1 is installed in a microwave oven and heated, the food F will be cooked with the seasoning liquid A. At this time, a steaming space S in which high-temperature water vapor generated by heating stays is formed in the upper part of the developing portion 10. The amount of water vapor that exceeds the volume of the packaging bag 1 diverges appropriately from the vapor hole 7 formed between the first zipper member 6 and the front member 2 to prevent the packaging bag 1 from being ruptured.

  After the cooking is finished, the user tears the second notch 13B, grasps the grip seal part 14, and places the food F and the seasoning liquid A in the container.

  According to the packaging bag 1 of the present embodiment, since the sealing portion 11 is provided on the second end side from the first zipper member 6 and the second zipper member 8, the sealed state is reliably maintained at the time of retorting, And the packaging bag which can be opened and added with a foodstuff and can be heated safely with a microwave oven can be comprised.

  Moreover, since the steam hole 7 for releasing the steam generated in the packaging bag 1 to the outside is provided between the first zipper member 6 and the front member 2, the first zipper member 6 and the second zipper member 8 Can be surely escaped to the outside while preventing the outflow of the contents.

  The main body film constituting the front member 2 is shrunk by pressure heat sterilization, but the first zipper member 6 is not shrunk by pressure heat sterilization. Wrinkles or the like due to distortion occur at the joint with 2. For this reason, it can be visually determined easily whether the packaging bag 1 has undergone pressure heating sterilization.

  Moreover, when the expansion | deployment part 10 which has the 1st folding | turning part 15 bent by the bellows shape and the 2nd folding | turning part 16 expand | deploys, the internal volume of the packaging bag 1 increases and the steaming space S is ensured. Therefore, heating without unevenness is performed inside the packaging bag 1 and cooking can be performed satisfactorily.

  Further, the end of the connecting member 12 on the side of the sealing member 9 extends at a certain angle with the back member 3 at the time of cooking, so that the seasoning liquid or the like in the expanding portion 10 It is prevented that it flows or splashes toward the steam hole 7.

  Furthermore, since the front member 6 is formed of a single sheet-like main body film, the number of parts is small, and the packaging bag can be configured in a simple structure at a low cost.

Next, the packaging bag of 2nd Embodiment of this invention is demonstrated with reference to FIGS. 10-12. The difference between the packaging bag 21 of the present embodiment and the packaging bag 1 described above is the structure of the sealing portion.
In addition, the same code | symbol is attached | subjected to the component which is common in the above-mentioned packaging bag 1, and the common description is abbreviate | omitted.

  FIG. 10 is a plan view of the connecting member 22 used for the packaging bag 21. The point that the second zipper member 8 is fixed on the connecting member 22 is the same as the connecting member 12 of the packaging bag 1. The other end of the connecting member 22 is not provided with a sealing member, and as shown in a cross-sectional view in FIG. 11, a substantially groove-shaped easy-to-cut portion 23 is provided at a predetermined location in the longitudinal direction. Yes. The easy-cut portion 23 may be formed when the connecting member 22 is extrusion-molded, or may be formed on the connecting member 22 as a half cut by a laser or the like.

  FIG. 12 is a partially enlarged cross-sectional view of the periphery of the sealing portion 24 of the packaging bag 21. The end of the connecting member 22 on the side where the second zipper member 8 is provided is fused and fixed to the inner surface of the back member 3 in the same manner as the packaging bag 1. The end of the other easy-to-cut portion 23 is fused and fixed to the inner surface of the front member 2 to form a sealing portion 24.

  When opening the packaging bag 21, as in the packaging bag 1, the first notch 13 </ b> A is torn and the engagement between the first zipper member 6 and the second zipper member 8 is released. Next, the user applies a force to pull the connecting member 22 away from the front member 2 in order to open the sealing portion 24.

  At this time, since there is no sealing member having an easy peel property in the sealing portion, the connecting member 22 and the front member 2 are firmly fused. If force is continuously applied to the connecting member 22, the thinned easily cut portion 23 is torn, and the connecting member 22 is separated from the front member 2 leaving a part fused with the front member 2, and the packaging bag 21 is opened. Is done.

  According to the packaging bag 21 of the present embodiment, since the sealing part 24 can be formed without using a sealing member made of a material different from that of the main body film, a packaging bag with a low manufacturing cost is provided by reducing the types of materials. can do.

  Although the embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. .

  For example, in each of the above-described embodiments, the example in which the steam hole 7 is provided between the front member 2 and the first zipper member 6 has been described. However, the steam hole may be the second zipper member 8 or the It may be provided between the connecting member and the back member 3. Further, it may be provided on both the front member 2 and the back member 3.

  Moreover, since the sealing state of seasoning liquid A etc. is ensured by the sealing part, it replaces with the above steam holes, and is in the arbitrary positions between the 1st zipper member and the 2nd zipper member 8, and the sealing part. A steam hole may be formed by providing a slit, a notch or the like.

  Further, in each of the above-described embodiments, the example in which the first folded portion 13 of the developing portion 10 and the second folded portion 14 on the second end portion 5 side are provided substantially in parallel has been described. It is not limited to this, and any positional relationship may be used as long as the fold lines do not intersect each other. Moreover, each folding | returning part 13 and 14 does not need to be parallel to the 1st end part 4 or the 2nd end part 5, for example, may be provided so as to be orthogonal to the 1st end part 4 or the 2nd end part 5. . In addition, although the volume increasing action is slightly reduced, the developing portion 10 may be configured by providing only one folded portion.

  Furthermore, in each of the above-described embodiments, the example in which the second zipper member 8 is fixed to the back member 3 via the connecting member has been described. Instead, the second zipper member 8 is directly connected to the back member. 3 and the connecting member may be fixed below the second zipper member 8.

Furthermore, in each above-mentioned embodiment, although the connection member in which the sealing member 9 was arrange | positioned was demonstrated to the back member 3, it replaces with this and a connection member is fixed to the front member 2. Also good.
However, since the portion to which the connecting member is fixed has higher rigidity than the portion of the main body film alone, the opening member 20 is more fixed when the connecting member is fixed to the back member 3 during cooking as shown in FIG. The periphery rises satisfactorily, and the connecting member extends above the expanding portion 10. Therefore, it is preferable that the connecting member is fixed to the back member 3 because the inflow or splashing of the seasoning liquid A or the like into the steam hole 7 is more preferably prevented.

  In addition, the surface of the sealing member 9 that faces the back member 3 may be directly fixed to the back member 3 without using a connecting member. However, if the 2nd zipper member 8 and the sealing member 9 are fixed via a connection member, since both can be fixed to a back member only by fixing a connection member, a manufacturing process can be simplified more.

It is a perspective view which shows the packaging bag of 1st Embodiment of this invention. (A) is sectional drawing in the AA line of FIG. 1, (B) is sectional drawing in the BB line of FIG. It is a perspective view which shows the front member of the packaging bag. It is a perspective view which shows the back member of the packaging bag. It is a perspective view which shows the state which joins the front member and back member of the packaging bag. It is sectional drawing which shows the packaging bag with which the seasoning liquid was filled inside. It is sectional drawing which shows the state which opened the opening of the packaging bag. It is sectional drawing which shows the state which throws a foodstuff into the packaging bag. It is sectional drawing which shows a state when the packaging bag is sealed and heat-cooked after adding ingredients. It is a top view which shows the connection member of the packaging bag of 1st Embodiment of this invention. It is sectional drawing in the CC line of FIG. It is an expanded sectional view which shows the sealing part periphery of the packaging bag.

Explanation of symbols

1, 21 Packaging bag 2 Front member 3 Back member 4 First end portion 5 Second end portion 6 First zipper member 7 Steam hole 8 Second zipper members 11 and 24 Sealing portion 11A Protruding portion 13 First turning portion 14 Second Folding part 17 opening

Claims (5)

The packaging bag is formed by integrally joining the four end portions of the front member and the rear member, and forming an opening by tearing the first end portion which is one of the end portions,
A first zipper member provided on the inner surface of the front member;
A second zipper member provided on an inner surface of the back member and engaged with the first zipper member to seal the opening so as to be freely opened and closed;
A sealing portion provided on the second end side opposite to the first end portion from the first zipper member, and integrally joining the front member and the back member;
A steam hole which is provided on the first end side from the sealing portion and releases steam generated in the packaging bag;
A packaging bag comprising:   The said steam hole is provided in at least one between the said 1st zipper member and the said front surface member, or the said 2nd zipper member and the said back surface member, The Claim 1 characterized by the above-mentioned. Packaging bag.   The back member includes a first folded portion folded back in a bellows shape, and a second folded portion folded back in a bellows shape apart from a fold line of the first folded portion, and the first folded portion and the The packaging bag according to claim 1, wherein both ends of the second folded portion in the fold line direction are integrally joined to each other.   The packaging bag according to any one of claims 1 to 3, wherein the sealing portion is formed of a material in which one inner surface to be joined has an easy peel property with respect to the other inner surface.   The packaging bag according to claim 4, wherein the sealing portion is formed in a linear shape having a convex portion on the first end portion side.

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