JP2019064609A - Zippered packaging bag - Google Patents

Abstract

To provide a zippered packaging bag allowing putting-in/out of an article and hardly carelessly opened from the bag inside.SOLUTION: A zippered packaging bag has a bag body 2 having a first wall surface sheet part 21 and a second wall surface part 22 and having a storage space S therein, and a zipper 4 having a first engagement part 51 and a second engagement part 52 engageable with each other and partitioning the bag body 2 into the storage space S and other parts. The first engagement part 51 is attached to an inner surface of the first wall surface sheet part 21 via a first board part 61, and the second engagement part 52 is attached to the inner surface of the second wall surface part 22 via a second board part 62. At least an end part 611 opposite side of the storage space S of the first board part 61 is fixed to the first wall surface sheet part 21, and an end part 621 opposite side of the storage space S of the second board part 62 is fixed to the second wall surface part 22. An end part 623 of the storage space side is separated from the second wall surface part 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a zippered packaging bag that can be opened and closed with a zipper.

2. Description of the Related Art Conventionally, a zippered packaging bag is known in which a zipper that defines a storage space and the rest is provided in the bag body. The zipper typically opens and closes the opening of the bag body by the engagement of the female and male hips.
Such a zippered packaging bag is a bag for storing articles such as food in the storage space, closing the zipper, and providing articles for storage (storage), transportation, and the like. Also, if desired, the zipper can be de-engaged to remove the item.

The zippered packaging bag is used not only for storage and transportation as described above, but also as a cooking tool.
For example, the zippered packaging bag is used as a packaging material for performing microwave treatment to heat articles such as food using a microwave oven or the like.
For example, in Patent Document 1, in a food-sealed bag which is formed of a laminated film composed of a soft film and a hard film and heated in a microwave oven, both side surfaces and the bottom except the opening of the upper portion of the bag are heated. Sealed by fusion, with zipper at the top opening, with a hot melt adhesive layer formed on the inner surface of the laminated film at the bottom of the zipper, and grooved on the surface to which the adhesive layer is applied A packaging bag is disclosed.
The zipper-wrapped packaging bag can suppress an increase in internal pressure because the vapor generated from the articles when microwave-treated is discharged from the groove portion to the outside.

JP, 2013-023273, A

However, in the zippered packaging bag as disclosed in Patent Document 1, the steam generated at the time of the microwave treatment may cause the zipper to be unengaged, and the articles may be blown out from the opening of the bag.
Also, the zipper may be released inadvertently other than using the zippered packaging bag for microwave cooking. For example, a load (pressure) may be applied from the outside of the bag body during storage or transport of the zippered packaging bag containing articles with air (or filling gas) contained in the storage space. The external pressure applied to the bag body may cause the air in the storage space to be pressurized, thereby releasing the occlusion of the zipper.

  An object of the present invention is to provide a zippered packaging bag which can put articles in and out of an internal storage space, and the internal pressure prevents the zipper from being released carelessly.

The present inventors examined using the zipper which can be engaged by force strong enough to withstand internal pressure rise (or internal pressure rise caused by external load) which arises at the time of microwave processing under the above-mentioned purpose, for example.
However, if a zipper that can be engaged with such a strong force is used, the zipper can not be easily released manually. If the zipper can not be easily released manually, the opening of the bag body can not be easily opened and closed.
The inventors of the present invention have conducted intensive studies to complete the present invention in order to achieve both the ease of opening and closing the bag by the zipper and the pressure resistance of the zipper, which are in the trade-off relationship.

  The zippered packaging bag according to the present invention has a bag body having a first wall sheet portion and a second wall sheet portion disposed opposite to each other, and having a storage space inside, and is provided inside the bag body and the bag body The zipper having the storage space and the other compartments, the zipper having a first engagement portion and a second engagement portion which can be engaged with each other, the first engagement portion being formed via the first plate portion It is attached to the inside of the 1st wall sheet part, and the 2nd occlusion part is attached to the inside of the 2nd wall sheet part via the 2nd plate part, and, among the 1st plate parts, At least an end opposite to the storage space is fixed to the first wall sheet portion, and an end of the second plate portion opposite to the storage space is fixed to the second wall sheet portion And the end portion on the storage space side is the second wall sheet portion It has been Hansa.

In a preferred zippered packaging bag of the present invention, the bag body is provided with a steaming unit for releasing steam during microwave treatment.
In a preferred zippered packaging bag of the present invention, the bag body is a sealed bag, and the bag body is provided with an opening area opposite to the storage space with respect to the zipper.

  By opening and closing the zipper, the zippered packaging bag of the present invention can put articles in and out of the storage space inside the bag body, and the zipper is difficult to be released carelessly even if the internal pressure in the bag body rises.

FIG. 2 is a front view of a zippered packaging bag (a packaging bag for microwave treatment) of the first embodiment. The end elevation cut by the II-II line of FIG. In addition, an end elevation says the figure showing only the cut surface (following, the same). The end elevation cut by the III-III line of FIG. The end elevation cut by the IV-IV line of FIG. The end elevation cut by the VV line of FIG. The perspective view of the packaging bag with a zipper (the packaging bag for microwave processing). The principal part enlarged end view of FIG. 2 (an enlarged end view around a zipper). The perspective view of the state where a part of bag main part was cut and an opening was formed. The perspective view which shows the state which released the zipper of the packaging bag for microwave processing. The perspective view which shows the state which microwave-processed the packaging bag for microwave processing. Sectional drawing cut | disconnected by the XI-XI line | wire of FIG. The perspective view of the zipper equipped packaging bag of 2nd Embodiment. The end view cut by the XIII-XIII line of FIG. The perspective view of the zipper equipped packaging bag of the modification of 2nd Embodiment. (A) is an enlarged end view around the zipper of the first example of the third embodiment, (b) is an enlarged end view around the zipper of the second example. (A) is an enlarged end view around the zipper of a 3rd embodiment, (b) is an enlarged end view around a zipper of the 4th example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present specification, the terms “upper” and “lower” are used as the terms indicating directions, but “upper” refers to the side on which the opening is formed with reference to the bag body, and “lower” is The upper side is the opposite side (the side opposite to the opening of the bag body). In addition, "first" and "second" may be added to the beginning of the term, but this first etc. is added only to distinguish the term, and special order such as order or superiority Have no meaning.
In the present specification, the numerical range represented by “lower limit value X to upper limit value Y” means lower limit value X or more and upper limit value Y or less. When a plurality of the numerical value ranges are separately described, it is possible to select an arbitrary lower limit value and an arbitrary upper limit value, and set "arbitrary lower limit value to arbitrary upper limit value".
It should be noted that the dimensions, scales and shapes of the layers, parts and members shown in the figures may differ from the actual ones.

First Embodiment
The first embodiment relates to a zippered packaging bag suitable for microwave processing applications for heating articles stored by microwave.
Hereinafter, the zippered packaging bag for such use is particularly referred to as a "microwave packaging bag".
In FIG. 1 to FIG. 7, the microwave treatment packaging bag 1A has a bag body 2, a steaming unit 3, and a zipper 4 provided inside the bag body 2.
The bag body 2 has a first wall surface sheet portion 21 and a second wall surface sheet portion 22 disposed opposite to each other, and has a storage space S inside. The steaming unit 3 is provided in a portion having the storage space S of the bag body 2. The steaming unit 3 has a mechanism for releasing the vapor generated from the articles stored in the storage space S to the outside of the space during the microwave processing.
The zipper 4 is provided inside the bag body 2 and divides the bag body 2 into a storage space S and a space other than the storage space. The zipper 4 has the 1st occlusion part 51 and the 2nd occlusion part 52 which can be engaged mutually. The first engaging portion 51 is attached to the inner surface of the first wall sheet portion 21 through the first plate portion 61, and the second engaging portion 52 is the second wall sheet through the second plate portion 62. It is attached to the inner surface of the part 22.
In the present invention, at least an end portion of the first plate portion 61 opposite to the storage space S is fixed to the first wall surface sheet portion 21, and the storage space S of the second plate portion 62 The end on the opposite side is fixed to the second wall sheet part 22 and the end on the storage space S side is separated from the second wall sheet part 22.

Specifically, the bag body 2 is in the form of a bag having a storage space S inside. In the present embodiment, the bag body 2 is a sealed bag that encloses the storage space S and the zipper 4.
The bag body 2 may be a sealed bag in a state in which an article is sealed in the storage space S in advance, or may be a sealed bag in a state where the storage space S is empty (a state in which no article is contained). It is also good.
The bag body 2 has the flexible first wall surface sheet portion 21 and the second wall surface sheet portion 22. The first wall surface sheet portion 21 and the second wall surface sheet portion 22 are disposed with the inner surfaces facing each other. There is. Furthermore, the bag body 2 has a flexible bottom sheet portion 23 interposed between the lower portion of the first wall sheet portion 21 and the lower portion of the second wall sheet portion 22. The bottom sheet portion 23 is folded in two and interposed between lower portions of the first and second wall sheet portions 22.

The front view shapes of the first wall surface sheet portion 21 and the second wall surface sheet portion 22 are not particularly limited, and, for example, substantially polygonal shapes such as a substantially square shape or a substantially hexagonal shape in front view; substantially circular shapes; substantially elliptical shapes; T-shape; irregular shape in which these shapes are combined; and the like. In the present specification, "abbreviation" means an acceptable range in the technical field to which the present invention belongs. For example, a substantially polygonal shape such as a substantially square, or a substantially T-shaped, is a shape in which the corner is chamfered, a shape in which a part of a side is slightly expanded or recessed, a shape in which a side is slightly curved, etc. Is included. In addition, that the corner is chamfered means removing the corner of an angular part and forming the part in the shape of an arc or a gentle obtuse angle. The “substantially” of the substantially circular and the substantially elliptical includes, for example, a shape in which a part of the circumference is slightly expanded or depressed, a shape in which a part of the circumference is slightly straight or hatched, and the like.
In the illustrated example, as shown in FIG. 1, each of the first wall surface sheet portion 21 and the second wall surface sheet portion 22 has a substantially rectangular shape (or a substantially square shape) in a front view, and has the same shape and size.

The bag manufacturing method of the bag main body 2 formed from the flexible sheet material can apply the bag manufacturing methods, such as a conventionally well-known packaging bag and a pouch bag.
For example, as in the present embodiment, when the bag body 2 includes the first wall sheet portion 21, the second wall sheet portion 22, and the bottom sheet portion 23, the first wall sheet portion 21 and the second wall sheet portion 21 are formed. A wall sheet portion 22 is stacked, and a bottom sheet portion 23 folded in half is interposed between lower portions thereof, and sealing is performed by sealing their peripheral ends (upper end, lower end and both side ends). The bag main body 2 which has the stored storage space S inside is formed.
In the illustrated example, the first wall surface sheet portion 21, the second wall surface sheet portion 22, and the bottom surface sheet portion 23 are made of sheet materials independent of each other, and the first wall surface sheet in which the bottom surface sheet portion 23 folded in two is interposed A sealed bag body 2 is formed by fixing a predetermined width between the portion 21 and the peripheral end portion of the second wall sheet portion 22. In addition, fixation means the state joined by the intensity | strength which can not be easily peeled off manually.

The fixing method of the peripheral end of the first wall sheet portion 21, the second wall sheet portion 22 and the bottom sheet portion 23 is not particularly limited, and typically, heat welding or adhesion using an adhesive is mentioned. Be Thermal welding is preferable because the sheet material can be adhered firmly and easily.
In FIG. 1, innumerable dots are added to the portion to which the sheet portion is fixed in terms of depiction. Moreover, in each end view of FIG. 2 etc., the location where the 1st wall surface sheet part 21 etc. are in contact, and the location where the sheet part and the zipper 4 are in contact are parts to which they are adhered.

  Although not particularly illustrated, the first wall sheet portion 21, the second wall sheet portion 22, and the bottom sheet portion 23 may be formed of a single sheet material. In that case, the first wall sheet is formed by folding one sheet material in a mountain fold at one place and valley-folding it on both sides of the mountain fold (by folding one sheet material into a substantially W shape in a side view) The portion 21, the second wall sheet portion 22, and the bottom sheet portion 23 can be configured. Further, two sheet portions selected from the first wall surface sheet portion 21, the second wall surface sheet portion 22 and the bottom surface sheet portion 23 are formed of one sheet material, and the remaining one sheet portion is formed of another sheet material. May be (not shown). Furthermore, the first wall sheet portion 21 may be formed of a sheet material in which two or more sheet materials are joined, and the second wall sheet portion 22 and the bottom sheet portion 23 are similarly joined. It may be formed of a sheet material (not shown).

As a sheet material which constitutes the 1st wall sheet part 21, the 2nd wall sheet part 22, and the bottom sheet part 23, a publicly known thing can be used. The sheet material may be either transparent or opaque. The sheet material can be appropriately selected according to the type of the article to be stored, the cost, etc. For example, a synthetic resin sheet having one resin layer or two or more resin layers, and the synthetic resin sheet, paper, synthetic The laminated body on which at least one chosen from paper, a foamed resin sheet, a nonwoven fabric, etc. was laminated | stacked, the laminated body of these and a barrier layer, etc. are mentioned. Although it is preferable to form the 1st wall surface sheet part 21, the 2nd wall surface sheet part 22, and the bottom face sheet part 23 with the same sheet material, you may form using a different sheet material.
A desired design is displayed by printing or the like on the bag body 2 including the first wall sheet portion 21 and the second wall sheet portion 22 as necessary (such design display is not shown).

  The sheet material forming the bag body 2 is preferably made of a synthetic resin sheet. The synthetic resin sheet is required to have basic performance as a bag, such as impact resistance, abrasion resistance, and heat resistance. Further, as described above, since the bag body 2 is usually formed by heat welding of sheet materials, the resin sheet is also required to have heat sealability. As the resin sheet, a multilayer sheet having a base film layer and a sealant layer for imparting heat sealing properties is preferable, and when high gas barrier properties and light shielding properties are required, the base film layer and the sealant layer Preferably, a barrier layer is provided between In addition, you may provide barrier property to the base film layer itself. In this case, a barrier layer is used as a base film layer, and it becomes a multilayer sheet which has a barrier layer and a sealant layer. However, in each end view and sectional view of FIG. 2 etc., the 1st wall surface sheet part 21, the 2nd wall surface sheet part 22, and the bottom face sheet part 23 are expressed by 1 layer structure for convenience.

Here, constituent materials of the base film layer, the sealant layer, and the gas barrier layer are illustrated. The lamination of these layers can be performed by a conventional lamination method, for example, co-extrusion lamination, dry lamination with an adhesive, or thermal lamination in which a heat adhesive layer is sandwiched and thermally bonded.
As a film which comprises a base film layer, polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), a polycarbonate (PC) etc.), polyolefin (polyethylene (PE), a polypropylene ( PP)), polyamide (nylon-6, nylon-66 etc), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polymethyl methacrylate (PMMA), poly One or two or more stretched or unstretched films composed of ether sulfone (PES) or the like can be exemplified.

As the film constituting the sealant layer, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene-propylene copolymer (EP), unstretched polypropylene (CPP), biaxially stretched nylon (ON) Ethylene-olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-vinyl acetate copolymer (EVA), etc. And a stretched or unstretched film.
The gas barrier layer may be a metal thin film such as aluminum, or a resin sheet such as vinylidene chloride (PVDC) or ethylene-vinyl alcohol copolymer (EVOH), or any synthetic resin sheet (for example, a base film layer). And films obtained by vapor deposition (or sputtering) of aluminum, inorganic oxides such as aluminum oxide and silica, and the like. From the viewpoint of microwave treatment, it is preferable to use a nonmetal material, for example, a resin sheet such as vinylidene chloride described above, for the gas barrier layer.
The sheet material may be provided with a printed layer (not shown) for displaying product descriptions such as product names, raw materials, precautions for use, and various other designs. For example, the printing layer can be formed on the inner surface of the base film layer by a known method such as gravure printing.

The zipper 4 is provided on the inner surface side of the bag body 2 in order to divide the inside of the bag body 2 into two spaces. The interior of the bag body 2 provided with the zipper 4 is divided into a storage space S for storing articles therein and the other with reference to the zipper 4. In the bag body 2 of the present embodiment, which is formed in a sealed shape, the inside is divided into a storage space S and a space T other than the storage space. The area | region corresponding to space T other than the said accommodation space among the bag main bodies 2 turns into the opening area | region 28 which opens the bag main body 2 at the time of use of the packaging bag 1A for microwave processing.
The arrangement of the zipper 4 is appropriately set in consideration of the opening area 28. The zipper 4 is disposed at a position where the width of the space T (the length in the vertical direction of the space) is 10 mm to 50 mm, since it is easy to open and secure the picking part 29 easy to pick with fingers after opening. Is preferred.
In addition, in order to make the bag body 2 easy to break in the unsealing area 28, it is preferable to form the incised portion 27 in a portion corresponding to the space T other than the storage space in the side end portion of the bag body 2 . In order to be able to leave the knob portion 29 after opening, it is preferable that the cut portion 27 be formed at a location corresponding to the middle in the vertical direction of the space T other than the storage space.

The zipper 4 is extended in a direction orthogonal to the vertical direction of the bag body 2 (hereinafter, a direction perpendicular to the vertical direction is referred to as “horizontal direction”). However, the zipper 4 may be provided so as to extend in an acute direction with respect to the vertical direction (not shown).
The zipper 4 has the 1st occlusion part 51 and the 2nd occlusion part 52 which can be engaged mutually. As the 1st occlusion part 51 and the 2nd occlusion part 52, the thing of the occlusion structure of a male and female is typically mentioned. As the zipper 4 of such a male-female structure, the structure etc. which are employ | adopted by the goods "zip lock" (registered trademark) by Asahi Kasei Home Products Co., Ltd. are mentioned, for example.
The first occlusion portion 51 and the second occlusion portion 52 are integrated by occlusion with each other, and can be separated from each other by releasing the occlusion.

  The first occlusal portion 51 is generally elongated and elongated, and for example, as shown in FIGS. 2 and 7, the base 511 and a female side projecting from the base 511 toward the second occlusal portion 52 It consists of a collar portion 512 and extends in the lateral direction of the bag body 2. The second occlusal portion 52 is generally elongated and long, and includes a base 521 and a male side collar 522 projecting from the base 521 toward the first occlusal portion 51, and the left and right sides of the bag body 2 It is extended in the direction. Note that, contrary to the illustrated example, the first occlusion portion 51 may have a male side collar portion, and the second occlusion portion 52 may have a female side collar portion.

The base portion 511 of the first engaging portion 51 is connected to a first plate portion 61 for attaching the first engaging portion 51 to the inner surface of the first wall sheet portion 21. The front view shape of the 1st board part 61 is strip-like, and has the same length as the 1st occlusion part 51. As shown in FIG. Usually, the first plate portion 61 is integrally formed with the first engaging portion 51.
The thickness of the first plate portion 61 may be uniform as shown in FIG. 7 and may be partially different although not particularly shown. As a case where thickness differs partially, the case where thinness becomes small toward the end of the cross direction etc. is mentioned. The width direction refers to a direction orthogonal to the longitudinal direction of the first plate portion 61. The thickness (in the case of non-uniformity, the maximum thickness) of the first plate portion 61 is not particularly limited, but is, for example, 0.3 mm to 2 mm.
The width W 61 of the first plate portion 61 is not particularly limited and is appropriately set, but if it is too small, it becomes difficult to attach the first plate portion 61 to the first wall surface sheet portion 21, and therefore 5 mm or more Preferably, 7 mm or more is more preferable, and 10 mm or more is more preferable. Although the upper limit of the width W 61 of the first plate portion 61 is not particularly limited, it is preferably 40 mm or less, and more preferably 30 mm or less because the operation of attaching the first plate portion 61 is complicated if the width W 61 is too large. Note that "width" refers to the length in the width direction (same below).

The base 511 of the first engaging portion 51 is integrally connected to a substantially central portion 612 in the width direction of the first plate portion 61.
The first plate portion 61 including the first occlusal portion 51 has its one end 611 in the width direction facing the storage space S and the other end 613 facing the storage space S. It is disposed on the inner surface of the wall sheet portion 21. The end portion 611 on one side in the width direction and the end portion 613 on the other side are end portions facing each other in the width direction with reference to the substantially central portion 612 in the width direction. Hereinafter, the end portion 611 on one side in the width direction of the first plate portion 61 is referred to as "first one end portion", and the end portion 613 on the other side in the width direction of the first plate portion 61 is referred to as "first other end portion The substantially central portion 612 of the first plate portion 61 is referred to as a “first central portion 612”.
The first one end portion 611, the first central portion 612, and the first other end portion 613 are conceptually portions which sequentially exist in the width direction of the first plate portion 61, and there is no clear mark thereof. However, here, the first plate portion 61 is equally divided into three in the width direction, and the three equal parts are sequentially regarded as the first one end 611, the first central part 612, and the first other end 613. I assume.
The back surface of at least the first one end portion 611 of the first plate portion 61 is fixed to the inner surface of the first wall sheet portion 21.
In the illustrated example, the entire back surface of the first plate portion 61 is fixed to the inner surface of the first wall sheet portion 21.

The base 521 of the second engaging portion 52 is connected to a second plate portion 62 for attaching the second engaging portion 52 to the inner surface of the second wall sheet portion 22. The front view shape of the 2nd board part 62 is strip-like, and has the same length as the 2nd occlusion part 52. As shown in FIG. In general, the second plate portion 62 is integrally formed with the second engaging portion 52.
The thickness of the second plate portion 62 may be uniform as shown in FIG. 7 and may be partially different although not particularly shown. As a case where thickness differs partially, the case where thinness becomes small toward the end of the cross direction etc. is mentioned. The width direction is a direction perpendicular to the longitudinal direction of the second plate portion 62. The thickness (in the case of non-uniformity, the maximum thickness) of the second plate portion 62 is not particularly limited, but is, for example, 0.3 mm to 2 mm.
The width W 62 of the second plate portion 62 is not particularly limited and may be set appropriately, but if it is too small, it will be difficult to attach the second plate portion 62 to the second wall sheet portion 22 and thus 5 mm or more Preferably, 7 mm or more is more preferable, and 10 mm or more is more preferable. Although the upper limit of the width of the second plate portion 62 is not particularly limited, it is preferably 40 mm or less, and more preferably 30 mm or less because the operation of attaching the second plate portion 62 is complicated if the width is too large.

The base portion 521 of the second engaging portion 52 is integrally connected to a substantially central portion 622 in the width direction of the second plate portion 62.
The second plate portion 62 including the second interlocking portion 52 has the end 621 on one side in the width direction facing the storage space S and the end 623 on the other side facing the storage space S. It is disposed on the inner surface of the wall sheet portion 22. The end portion 621 on one side in the width direction and the end portion 623 on the other side are end portions facing each other in the width direction with reference to the substantially central portion 622 in the width direction. Hereinafter, an end 621 on one side in the width direction of the second plate 62 is referred to as a "second one end 621", and an end 623 on the other side in the width direction of the second plate 62 is "second other end" The portion 623 ′ ′ is referred to as “the second central portion 622”.
The second one end 621, the second central portion 622 and the second other end 623 are conceptually conceptually portions which sequentially exist in the width direction of the second plate 62 and there is no clear mark thereof. However, here, the second plate portion 62 is divided into three in the width direction, and the three equal parts are regarded as the second one end 621, the second center 622 and the second other end 623 in order I assume.

The back surface of the second one end portion 621 of the second plate portion 62 is fixed to the inner surface of the second wall sheet portion 22. On the other hand, the second other end portion 623 of the second plate portion 62 is separated from the inner surface of the second wall sheet portion 22.
Specifically, the second one end 621 including the one end 62 a is fixed to the inner surface of the second wall sheet portion 22 with a predetermined width.
Further, the second other end 623 including the other side edge 62 b is separated from the inner surface of the second wall sheet portion 22, and further, of the second plate 62 continuing to the second other end 623. The second central portion 622 (in the present embodiment, the second engaging portion 52 is connected here) is also separated from the inner surface of the second wall sheet portion 22. That is, the second other end portion 623 and the second central portion 622 of the second plate portion 62 are not fixed to the inner surface of the second wall surface sheet portion 22, and both can be freely separated. The width WA (non-sticking width WA) of the portion of the second plate 62 not fixed to the second wall sheet portion 22 is not particularly limited, but if it is too small, the vapor generated at the time of the microwave treatment There is a possibility that the space between the back surface of the plate portion 62 and the inner surface of the second wall sheet portion 22 may become sufficiently intrusive and difficult to act. From this point of view, the non-sticking width WA of the second plate portion 62 is preferably 3 mm or more, and more preferably 5 mm or more. The upper limit of the non-sticking width WA of the second plate portion 62 is the minimum value of the width W62 of the second plate portion 62−the sticking width WB. The fixed width WB will be described later.

  The second one end 621 may be entirely fixed to the second wall sheet portion 22. A part of the second one end 621 including the end edge 62a on one side is the second wall sheet portion 22. It may be fixed. In the illustrated example, a part including the end 62 a on one side of the second one end 621 is fixed. The width WB (fixed width WB) of the portion fixed to the second wall sheet portion 22 of the second plate portion 62 is not particularly limited and can be set appropriately, but if too small, the second plate portion 62 2 There is a risk of being inadvertently detached from the wall sheet portion 22. From this point of view, the fixing width WB of the second plate portion 62 is preferably 2 mm or more, and more preferably 3 mm or more. The upper limit of the fixing width WB of the second plate portion 62 is the width W62 of the second plate portion 62−the minimum value of the non-sticking width WA.

The fixing method of the first plate portion 61 and the second plate portion 62 to the first wall surface sheet portion 21 and the second wall surface sheet portion 22 is not particularly limited, and heat welding, adhesion using an adhesive, etc. are independently performed. Can be mentioned.
The first occlusion portion 51 and the first plate portion 61, and the second occlusion portion 52 and the second plate portion 62 are flexible and have mechanical strength to such an extent that they function as the zipper 4. It is preferable that the first plate portion 61 and the second plate portion 62 be more difficult to bend than the corresponding first wall sheet portion 21 and second wall sheet portion 22 respectively. The first plate portion 61 and the first plate portion 61 having a bending strength higher than that of the first wall surface sheet portion 21 and the second wall surface portion 22 by appropriately setting the thickness and the forming material of the first plate portion 61 and the second plate portion 62. The two plate portions 62 can be configured.
The first occlusion portion 51 and the first plate portion 61, and the second occlusion portion 52 and the second plate portion 62 are formed using a conventionally known synthetic resin, an elastomer, or the like.

The steaming unit 3 has a mechanism for releasing the vapor generated from the articles stored in the storage space S to the outside of the space during microwave processing. If it has such a mechanism, a conventionally well-known steaming part can be applied to the bag main body 2 of this invention.
With reference to FIGS. 1 to 5, for example, the steaming unit 3 of the illustrated example is for releasing steam from between the two extension sheet portions 31 and 32 stacked in a spiral shape, and the second wall sheet It is provided in the section 22.
Specifically, two extension sheet parts 31 and 32 (a first extension sheet part 31 and a second extension sheet part 32) are extended from a part of the second wall sheet part 22. The first extension sheet portion 31 and the second extension sheet portion 32 have, for example, a strip shape having the same length as the length of the second wall sheet portion 22 in the left-right direction.
A portion in the plane of the second wall sheet portion 22 is separated in the left-right direction, and one end of the second wall sheet portion 22 and the end of one side of the first extension sheet portion 31 are separated Are connected, and the other end of the second wall sheet portion 22 and the one end of the second extension sheet portion 32 are connected. The inner surface of the first extending sheet portion 31 and the inner surface of the second extending sheet portion 32 are stacked while being separated from each other, and the other side of each of the first extending sheet portion 31 and the second extending sheet portion 32 The end is a free end.
Between the first extending sheet portion 31 and the second extending sheet portion 32, there is a gap U communicated with the storage space S of the bag main body 2, and from the gap U, the first extending sheet portion 31 and the A ventilable passage may be formed up to the other end of the second extension sheet portion 32.
Then, the inner surface of the first extension sheet portion 31 and the inner surface of the second extension sheet portion 32 have the portion 33 where the bonding width is reduced, and are entirely bonded in the left-right direction.
The portion 33 where the bonding width is reduced is bonded with a bonding width and / or bonding strength which is peeled off by the internal pressure at the time of microwave treatment.
In the illustrated example, the second wall sheet portion 22 is formed of two sheet members, and the respective sheet members are bent to form the first extension sheet portion 31 and the second extension sheet portion 32. The second wall sheet portion 22 is formed.

The microwave treatment packaging bag 1A is used, for example, as follows.
As shown in FIG. 8, the opening area 28 of the bag body 2 is opened to form an opening 8 communicating with the space T other than the storage space. When the incised portion 27 is formed, the unsealing area 28 of the bag body 2 can be easily cut to form the opening 8 by using the incised portion 27. The scrap 24 generated by the cutting is discarded.
As shown in FIG. 9, the occlusion of the first occlusal part 51 and the second occlusal part 52 is released and the storage space S is opened by pinching the pair of oppositely facing pinching parts 29 of the zipper 4 with fingers and pulling it out as shown in FIG. Can be released.
In the packaging bag 1A for microwave treatment of the present invention, at least the first one end 611 (the end opposite to the opening area 28) of the first plate portion 61 is fixed to the first wall sheet portion 21 and the second Since the second one end 621 (the end opposite to the opening area 28) of the plate 62 is fixed to the second wall sheet portion 22, the zipper 4 can be easily attached in the same manner as a conventional zippered bag. It can be released.

(A) When an article is sealed in advance in the storage space If an article is sealed in the storage space S in advance, another article is put into the storage space S from the opening 8, for example. In a specific use example, the seasoning liquid is put in advance in the storage space S, and after opening, the food material is put in the storage space S, and the like.
Also, the previously enclosed article is taken out, some processing is performed, and it is put back into the storage space S or added and put in another article. In a specific use example, a food vacuum-packed in advance is put in the storage space S, and after taking it out and opening it, the food is put back into the storage space S or another food is added and put back, etc. Can be mentioned.
(B) When an Article is not Sealed in the Storage Space in advance When an article is not sealed in the storage space S in advance, for example, the article is put from the opening 8. In a specific use example, food ingredients may be put in the storage space S after opening.

After the article is put in the storage space S, the storage space S can be sealed by closing the zipper 4.
The packaging bag 1A for microwave treatment is placed in a microwave generator such as a microwave oven and irradiated with microwaves. The microwave treatment raises the temperature of an article such as food and generates steam. As the internal pressure gradually rises due to the generation of steam, as shown in FIGS. 10 and 11, the flexible bag body 2 expands.
In the packaging bag 1A for microwave treatment of the present invention, the second other end 623 (the end on the storage space S side) of the second plate portion 62 is separated from the second wall surface sheet portion 22, so the bag body 2 As the inner surface of the second wall sheet portion 22 separates from the back surface of the second other end portion 623 of the second plate portion 62 and the second inner end of the second plate portion 62 Steam enters between the back of the part 623. In particular, when the second plate portion 62 is more difficult to bend than the second wall sheet portion 22, the second plate portion 62 hardly follows the second wall sheet portion 22 when the bag main body 2 is expanded, as described above. The steam reliably enters between the inner surface of the second wall sheet portion 22 and the back surface of the second other end 623 of the second plate portion 62. By the entry of steam, as shown in FIG. 11, the distance between the second wall surface sheet portion 22 and the second other end portion 623 of the second plate portion 62 is expanded, and the second plate portion 62 becomes the first plate portion. 61 will be pushed to the side. For this reason, the occlusion of the 1st occlusion part 51 and the 2nd occlusion part 52 is not released at the time of microwave processing.
Further, the steam enters the gap U (passage) of the first extending sheet portion 31 and the second extending sheet portion 32 from the storage space S, and a portion 33 where the bonding width of both the sheet portions 31 and 32 is reduced. Concentrate on and peel off that part. For this reason, as shown to FIG. 10 and FIG. 11, a vapor | steam is discharged | emitted from the steaming part 3, and it can prevent that the internal pressure of packaging bag 1A for microwave processing rises too much.
After microwave heating is completed, the zipper 4 can be released to easily remove the warmed article.

Modified Example of First Embodiment
In the above-mentioned packaging bag 1A for microwave processing, although what laminated | stacked two sheets of sheet parts like the vapor transmission part 3 in the shape of a palm is adhered and was illustrated, packaging bag 1A for microwave processing of this invention is The steaming section applied to the packaging bag for microwave treatment of
In the present invention, for example, as disclosed in JP-A-2017-074952, a mode in which a steaming mechanism is provided at the upper end portion of two sheets as disclosed in JP-A-2017-105503 and the like is disclosed. In the embodiment in which the steaming mechanism is provided in the bottom sheet portion 23 as described above, the embodiment in which the steaming mechanism is provided in the inside of the bag body 2 as disclosed in JP-A-2016-210484 and the like, Various forms are applicable, such as a form in which the steaming label is attached to the bag body 2 as disclosed in the open 2015-193419 and the like.

  Although the bag body 2 of the microwave treatment packaging bag 1A is a sealed bag, the microwave treatment packaging bag 1A of the present invention can seal the storage space S of the bag body 2 with the zipper 4. The above-mentioned opening area may be opened in advance (an opening is formed in advance). The microwave treatment packaging bag 1A in which the opening is formed in advance is like the one in which the scrap 24 in FIG. 8 is removed.

  Hereinafter, the second embodiment of the present invention will be described. In the description, configurations and effects different from those of the above embodiment will be mainly described, and terms or symbols similar to those of the above embodiment are incorporated as they are. The description of the configuration may be omitted (the same applies to the third and subsequent embodiments).

Second Embodiment
The second embodiment relates to a zippered packaging bag mainly used for applications other than microwave heating applications.
For example, as shown in FIGS. 12 and 13, the zippered packaging bag 1B is the bag body 2 having the first wall sheet portion 21 and the second wall sheet portion 22 disposed opposite to each other, and the storage space S And a zipper 4 provided inside the bag body 2 and dividing the bag body 2 into the storage space S and the other space, the first and second occlusal portions 51 and 52 capable of being engaged with each other. And having a zipper. The first occlusion portion 51 is attached to the inner surface of the first wall sheet portion 21 via the first plate portion 61, and the second occlusion portion 52 is the second wall sheet portion via the second plate portion 62. It is attached to the inner surface of 22. At least an end portion of the first plate portion 61 opposite to the storage space S is fixed to the first wall sheet portion 21, and of the second plate portion 62, the opposite side to the storage space S An end portion is fixed to the second wall sheet portion 22 and an end portion on the storage space S side is separated from the second wall sheet portion 22.
In the illustrated example, the bag body 2 has an open bag structure having an opening, and the opening 8 is closed by the engagement of the zipper 4.
The zippered packaging bag 1B of the second embodiment is different from the first embodiment in that it does not have the steaming unit 3, and the specific configuration and effects other than the steaming unit are the same as those of the first embodiment. It is similar.

The zippered packaging bag 1B of the present embodiment can be used, for example, as a mixing bag for cooking. Specifically, the cook releases the zipper 4 to open the opening 8 and inserts ingredients and seasonings from there into the storage space S and engages the zipper 4 to open the opening 8 of the bag body 2. close up. The ingredients can be mixed with the seasoning by tapping or stirring from outside the bag body 2 by the cook. In such usage, air is usually mixed in the storage space S, and the internal pressure may rise intermittently at the time of mixing, but according to the zippered packaging bag 1B of the present invention, the zipper 4 is careless Can be prevented from being released. Even when the storage space S contains substantially no gas such as air, the internal pressure may rise similarly when the storage space S is filled with a liquid such as a seasoning liquid, but in such a case However, the zipper 4 can be prevented from being released carelessly.
In addition to the usage as the mixing bag for cooking, there are various usages such as putting an article in the storage space S and storing it in a refrigerator, taking it to a travel destination, and the like, in addition to the usage as the mixing bag for cooking.

The bag body 2 of the zippered packaging bag 1B is configured to have the opening 8. However, as shown in FIG. 14, for example, the bag body 2 may be a sealed bag.
Generally, when a product containing an article is produced in the storage space of a zippered packaging bag, which is a sealed bag, the internal pressure may rise due to external pressure during storage and transport of the product, and the zipper may be released, The goods never go outside. However, since the article (especially when the article is a liquid) enters the space other than the storage space, it may give an unsanitary impression to the consumer who purchases the article. Such a problem can be prevented by using the zippered packaging bag 1 of the present invention.

Third Embodiment
The third embodiment relates to various fixing forms of the first plate portion 61 and the second plate portion 62 with respect to the first wall surface sheet portion 21 and the second wall surface sheet portion 22.
In the first and second embodiments, the entire back surface of the first plate portion 61 is fixed to the inner surface of the first wall surface sheet portion 21. For example, as shown in FIG. 15A, the first plate portion A portion including the entire edge of the first one end 611 of the first end portion 61 or the edge 61 a on one side is fixed to the first wall surface sheet portion 21, and the first other end 613 and the first central portion 612 of the first plate portion 61 It may be separated from the first wall sheet part 21. Further, although not particularly illustrated, a portion including the entire edge 61 a of the first one end portion 611 of the first plate portion 61 or a portion including the entire edge 61 b of the first other end 613 or the other side May be fixed to the first wall sheet portion 21 and the first central portion 612 may be separated from the first wall sheet portion 21.

  Furthermore, in the first and second embodiments, a part of the second one end 621 including the end edge 62 a of the second plate 62 is fixed to the second wall sheet part 22, for example, As shown in FIG. 15 (b), the entire second one end 621 and the second central portion 622, and a part of the second other end 623 continuous with the second central portion 622 are the second wall sheet portion 22. And a portion of the second other end portion 623 including the other end edge 62 b may be separated from the second wall sheet portion 22. Further, although not particularly illustrated, the whole of the second one end 621 and the whole or a part of the second central portion 622 are fixed to the second wall sheet portion 22 and the whole of the second other end 623 is the second wall The sheet portion 22 may be separated.

  Moreover, in the said, 1st and 2nd embodiment, although the 1st occlusion part 51 and the 2nd occlusion part 52 are connected with the 2nd center part 622 of the 1st board part 61 and the 2nd board part 62, for example, As shown in FIG. 16 (a), the first interlocking portion 51 is connected to the first one end portion 611 of the first plate portion 61 or its end portion, and the second interlocking portion 52 is the second plate portion It may be connected to the second one end 621 of 62 or its end. Also, as shown in FIG. 16 (b), the first interlocking portion 51 is connected to the first other end 613 of the first plate portion 61 or its end, and the second interlocking portion 52 is the second plate. It may be connected to the second other end 623 of the portion 62 or closer to the end thereof.

[Others]
In the first and second embodiments, the bag body 2 is constituted by the three surface portions of the first wall surface sheet portion 21, the second wall surface sheet portion 22, and the bottom surface sheet portion 23. For example, the first wall surface sheet portion 21 and the second wall sheet part 22 may be constituted, or the first wall sheet part 21, the second wall sheet part 22 and one or two side sheet parts (so-called side gusset) 3 It may be composed of faces or four faces, or it may be composed of four faces or five faces of the first wall sheet part 21, the second wall sheet part 22, one or two side sheet parts and the bottom sheet part 23. May be (not shown).
In addition, two or more configurations selected from the above-described embodiments may be appropriately combined, or one or more configurations selected from the above-described embodiments may be replaced with other embodiments. .

1A, 1B Packaging bag with zipper 2 Bag body 28 Opening area 3 Steaming part 4 Zipper 51 1st occlusion part 52 2nd occlusion part 61 1st board part 611 The end of the 1st board part on the opposite side to the storage space 62 second plate portion 621 end portion of the second plate portion opposite to the storage space 623 end portion S of the second plate portion on the storage space side storage space

Claims (3)

A bag body having a first wall sheet portion and a second wall sheet portion disposed opposite to each other and having a storage space therein;
A zipper provided inside the bag body and partitioning the bag body into the storage space and the other, the zipper having a first engagement portion and a second engagement portion which can be engaged with each other;
The first engagement portion is attached to the inner surface of the first wall sheet portion through the first plate portion, and the second engagement portion is the inner surface of the second wall sheet portion through the second plate portion. Attached to the
Of the first plate portion, at least an end opposite to the storage space is fixed to the first wall sheet portion,
Among the second plate portion, an end opposite to the storage space is fixed to the second wall surface sheet portion, and an end on the storage space side is separated from the second wall surface sheet portion , Zippered packaging bag.   The zipper-wrapped packaging bag according to claim 1, wherein the bag body is provided with a steaming unit configured to release steam during microwave treatment. The bag body is a sealed bag,
The zippered packaging bag according to claim 1 or 2, wherein the bag body is provided with an opening area opposite to the storage space with respect to the zipper.

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