JP2021020725A - Packaging bag - Google Patents

Abstract

To provide a packaging bag which is easily handled with no numbness in hands when contents are cold.SOLUTION: A packaging bag 1 includes a bag body part 5 that has a surface part 21 and a back part 22 composed of a laminate film 60 and has a storage part 2, a seal part 4 and a seal planned part 4a provided as necessary, and a heat insulating adhesive member 50 provided on the bag body part 5, in which the heat insulating adhesive member 50 is provided in a region overlapping at least a part of the storage part 2 of the surface part 21 and the back part 22 in plan view of the bag body part 5, the heat insulating adhesive member 50 includes a plurality of recess shapes 51 on both surfaces thereof, the recess shapes 51 are equally formed on both surfaces of the heat insulating adhesive member 50, when an average value of diameters of each opening of the recess shapes 51 opened in the surface on the bag body part 5 side is represented by Dave1 and an average value of diameters of each opening of the recess shapes 51 opened in a surface opposite to the bag body part 5 side is represented by Dave2, a relation of |Dave1-Dave2|/Dave2≤0.5 is satisfied.SELECTED DRAWING: Figure 1

Description

The present invention relates to a packaging bag made by stacking laminated films and heat-sealing them.

Conventionally, there is known a packaging bag (container) that can accommodate the contents and easily pour out the contents from the spout (see, for example, Patent Document 1). When the contents are taken out from such a packaging bag, the contents are poured out from the spout by holding the packaging bag by hand and pressing the accommodating portion containing the contents.
However, when the contents are refrigerated or frozen, the packaging bag itself containing the contents is as cold as the contents, so it is difficult to pour the contents out of the packaging bag. In some cases, the contents could not be pushed out sufficiently, or the packaging bag containing the contents could not be kept.

Japanese Patent Application Laid-Open No. 10-59388

An object of the present invention is to provide a packaging bag that is easy to handle even when the contents are cold without being crushed by hands.

The present invention solves the above-mentioned problems by the following solutions. In addition, in order to facilitate understanding, the description will be given with reference numerals corresponding to the embodiments of the present invention, but the present invention is not limited thereto.

The first invention has a front surface portion (21) and a back surface portion (22) composed of a laminated film (60) including at least a base material layer (61) and a sealant layer (64), and contains the contents. A bag main body portion (2) having an accommodating portion (2), a sealing portion (4) formed around the accommodating portion, and a planned sealing portion (4a) provided around the accommodating portion as needed. A packaging bag (1) including a 5) and a heat insulating adhesive member (50) provided on the bag main body, wherein the heat insulating adhesive member is the surface portion and the heat insulating adhesive member in a plan view of the bag main body. The heat insulating adhesive member is provided in a region of the back surface portion that overlaps at least a part of the housing portion, and the heat insulating adhesive member has a plurality of concave shapes (51) on both sides thereof, and the concave shape is the heat insulating adhesive member. The average value of the diameters of the concave openings that are evenly formed on both sides of the bag and that open to the surface of the bag body is set to ^Dave _1, and the openings are formed on the surface opposite to the bag body. When the average value of the diameters of the respective concave openings is D ^ave ₂ , the packaging bag satisfies the relationship of | D ^ave ₁ − D ^ave ₂ | / D ^ave ₂ ≦ 0.5.

In the second invention, in the packaging bag (1) of the first invention, the heat insulating adhesive member (50) has a surface portion (50) so as to have a plane-symmetrical position in a side view of the bag main body (5). 21) and the packaging bag provided on the back surface portion (22).

The third invention is the packaging bag (1) of the first invention or the second invention, wherein the heat insulating adhesive member (50) is the seal portion (4) in the plan view of the bag main body portion (5). A packaging bag provided so as to avoid an area overlapping the planned seal portion (4a).

In the fourth invention, in the packaging bag (1) of the third invention, the heat insulating adhesive member (50) is provided at a position 2 mm or more away from the seal portion (4) and the planned seal portion (4a). It is a packaging bag.

In a fifth aspect of the invention, in any of the packaging bags (1) from the first invention to the fourth invention, the heat insulating adhesive member (50) is mounted on the front surface portion (21) and the back surface portion (22). It is a packaging bag provided on the top.

A sixth invention is any packaging bag from the first invention to the fifth invention, in which the cooled contents are stored in the storage portion (2).

According to the present invention, even when the content is cold, it can be easily handled without being struck by the hand.

It is a top view which shows the appearance of the packaging bag of an embodiment. It is a perspective view of the packaging bag containing the contents of an embodiment. It is sectional drawing of the laminated film used for the bag main body part of embodiment. It is a figure which shows an example of the method of providing the heat insulating adhesive member on the bag main body part. It is a figure which shows the manufacturing apparatus of a heat insulating adhesive member. It is a figure explaining the manufacturing method of the heat insulating adhesive member. It is a photograph which magnified the adhesive surface of the heat insulating adhesive member of an Example from the front direction. It is an enlarged view in the cross section in the direction orthogonal to the sheet surface of the heat insulating adhesive member of an Example. It is a figure which shows the peeling force of an Example and a comparative example. It is a figure which shows the observation result of the sample 1. It is a figure which shows the observation result of the sample 2. It is a figure which shows the observation result of the sample 3. It is a figure which shows the observation result of the sample 4.

Hereinafter, embodiments of the present invention will be described with reference to the drawings and the like.
In addition, each figure shown below including FIG. 1 is a diagram schematically shown, and the size and shape of each part are exaggerated as appropriate for easy understanding.
In addition, although terms such as sheet and film are used, these are generally used in the order of thickness, sheet, and film, and are used in the same manner in this specification. ing. However, since there is no technical meaning in such proper use, these words can be replaced as appropriate.
Further, numerical values such as dimensions of each member and material names described in the present specification are examples of embodiments, and are not limited thereto, and may be appropriately selected and used.

In the present specification, terms that specify a shape or a geometric condition, for example, terms such as parallel and orthogonal, have the same optical function in addition to their strict meanings, and can be regarded as parallel or orthogonal. It shall also include the state having the error of.
In the present specification, the sheet surface (film surface) refers to a surface of each sheet (film) that is in the plane direction of the sheet (film) when viewed as a whole. To do.

(Embodiment)
FIG. 1 is a plan view showing the appearance of the packaging bag of the present embodiment.
FIG. 2 is a perspective view of a packaging bag containing the contents of the present embodiment.

The packaging bag 1 of the present embodiment is a container for enclosing the contents of food such as refrigerated or frozen confectionery (ice cream or gel). As shown in FIG. 1, the packaging bag 1 includes an accommodating portion 2 for accommodating the contents, a spout 3 capable of pouring out the contents from the accommodating portion 2, a seal portion 4 surrounding the accommodating portion 2, and accommodating the contents. A bag main body portion 5 having a planned seal portion 4a provided around the portion 2 as needed, and a heat insulating adhesive member 50 provided on the front surface and the back surface of the bag main body portion 5 are provided.

(Bag body)
As shown in FIGS. 1 and 2, the bag body 5 of the packaging bag 1 is made of a flexible laminated film. The laminated film constituting the bag body 5 forms a front surface film 21 (front surface portion), a back surface film 22 (back surface portion) forming the back surface, and gusset folding portions of the left and right side portions 33. A sheet of side films 23 (23a, 23b) is provided. That is, the bag main body portion 5 has a side gusset bag shape having a gusset folding portion on the side portion 33. From a different point of view, the bag body 5 has a front surface formed by the front surface film 21, a back surface formed by the back surface film 22, and a side surface formed by the gusset folding portion (side surface film 23) of the side portion 33. Have.

In the present embodiment, the front surface film 21 and the back surface film 22 are composed of a substantially rectangular laminated film. The substantially square wave is not limited to a geometrical rectangle, and includes a shape recognized as a rectangle in the whole view. For example, any one or more of the side edge, the bottom edge, and the top edge may include a curved portion. Further, the corners of the laminated film may be rounded in an arc shape that is convex outward.

The gusset folding portion is provided on the side portion 33 of the bag main body portion 5. When the contents are stored in the accommodating portion 2, the gusset folding portion is sufficiently widened. Therefore, the volume of the accommodating portion 2 can be increased as compared with the case of a flat pouch having no gusset folding portion on the side portion. On the other hand, when the contents are not stored in the accommodating portion 2, the side film 23 forming the gusset folding portion is formed in a substantially rectangular shape, and is folded back so that the folded portion 35 is formed on the accommodating portion 2 side. Is done. As a result, the overall thickness of the bag body 5 is reduced.

Further, the front surface film 21, the back surface film 22, and the side surface film 23 may be laminated films that are separate from each other or may be laminated films that are connected to each other before the bag body 5 is formed. In the case of the laminated film which is articulated, any two or more of the front surface film 21, the back surface film 22, and the side surface film 23 may be articulated. The articulated laminated film is bent to form any two or more of the front surface film 21, the back surface film 22, and the side surface film 23.

In the present embodiment, the bag main body 5 is formed of an individually configured front surface film 21, a back surface film 22, and two side surface films 23.
The front surface film 21, the side surface film 23a, the back surface film 22, and the side surface film 23b are heat-sealed (heat-welded) with the side portions of the adjacent films so that a tubular shape is formed on the side portion 33 of the bag main body portion 5. Joined by. By this bonding, side seals are provided between the front surface film 21 and the side film 23a, between the side film 23a and the back surface film 22, between the back surface film 22 and the side film 23b, and between the side film 23b and the front surface film 21, respectively. The portion 43 is formed.
The inside of the tubular shape formed by the front surface film 21, the side surface film 23a, the back surface film 22, and the side surface film 23b is the accommodating portion 2.

In the upper portion 31 of the bag body 5, the front surface film 21, the side surface film 23a, the back surface film 22, and the side surface film 23b joined by the side sealing portion 43, and the two side surface films 23 are the front surface film 21 and the back surface film 22. The upper part of each film is joined by a heat seal in a state of being folded in half by the folded portion 35 toward the accommodating portion 2 side between them. Here, the upper portion on the front surface side of the side film 23 folded in half by the folded-back portion 35 is bonded to the front surface film 21, and the upper portion on the back surface side is bonded to the back surface film 22. As a result, the upper seal portion 41 is formed on the upper portion 31 of the bag main body portion 5.
Here, the spout 3 is joined to the center of the upper portion 31 of the front surface film 21 and the back surface film 22 so as to be sandwiched between the front surface film 21 and the back surface film 22. At this time, the spout 3 is joined so that one end penetrates the accommodating portion 2 side and the other end on which the opening / closing lid is formed protrudes from the upper portion 31 of the bag main body portion 5.

Further, in the lower portion 32 of the bag main body 5, the front surface film 21, the side surface film 23a, the back surface film 22, and the side surface film 23b bonded to each other by the side sealing portion 43, and the two side surface films 23 are the front surface film 21 and the back surface. The lower part of each film is joined by heat sealing in a state of being folded in half by the folded portion 35 toward the accommodating portion 2 side between the films 22. Here, the lower portion on the front surface side of the side film 23 folded in half by the folded-back portion 35 is joined to the front surface film 21, and the lower portion on the back surface side is joined to the back surface film 22. As a result, a lower seal portion 42 is formed on the lower portion 32 of the bag main body portion 5.

In the bag body 5, at least one of the upper seal portion 41, the lower seal portion 42, and the side seal portion 43 of the bag main body portion 5 is in an unsealed state before the contents are housed. The contents can be sealed by accommodating the contents from the planned seal portion 4a in the accommodating portion 2 and heat-sealing (joining) the scheduled seal portion 4a.
The bag main body portion 5 of the present embodiment is formed so that the upper seal portion 41 and the side seal portion 43 surround the accommodating portion 2 as the seal portion 4 before accommodating the contents in the accommodating portion 2. The portion where the seal portion 42 is formed becomes the planned seal portion 4a in the unsealed state. By accommodating the contents from the unsealed planned seal portion 4a into the accommodating portion 2 and forming the lower seal portion 42 by heat sealing, the contents can be sealed in the accommodating portion 2 of the bag main body portion 5. it can.

The filling method of the contents is not limited to this. For example, before the contents are stored in the storage portion 2, the lower seal portion 42 and the side seal portion 43 serve as the seal portion 4 and the storage portion 2 is used. The contents may be filled from the planned seal portion 4a so that the portion formed so as to surround the upper seal portion 41 is the unsealed planned seal portion 4a.
Further, the planned seal portion that is not sealed is omitted, and the upper seal portion 41, the lower seal portion 42, and the side seal portion 43 are formed as the seal portion 4 so as to surround the accommodating portion 2 before filling the contents. The contents may be filled into the accommodating portion 2 from the spout 3.

(Laminated film)
FIG. 3 is a cross-sectional view of a laminated film used for the packaging bag of the present embodiment.
The front surface film 21 (front surface portion), the back surface film 22 (back surface portion), and the side surface film 23 constituting the bag main body portion 5 are made of a laminated film 60. FIG. 3 shows the layer structure of the laminated film 60. As described above, the bag body 5 is made by heat-sealing a pair of front surface films 21 and a back surface film 22 and a laminated film 60 forming two side film 23 (23a, 23b). For this reason, the laminated film 60 is provided with a sealant layer 64 having a sealing property on the inner side of the container.
Further, in the bag body 5 of the present embodiment, the base material layer 61, which is the printing base material, is provided on the outer side of the container from the sealant layer 64. Further, the laminated film 60 includes an intermediate layer 63 in order to impart various functions required as a packaging bag for accommodating refrigerated or frozen contents. Therefore, the laminated film 60 having such a layer structure has the base material layer 61 and the intermediate layer 63 from the outer side of the container to the inner side of the container when the bag is made into the bag main body 5. And the sealant layer 64 are included in this order. Hereinafter, each layer will be described in detail.

The base material layer 61 is a layer that is the basis of the laminated film 60, and becomes the outermost layer when the bag main body portion 5 is formed. For example, as the base material layer 61, a stretched polyethylene terephthalate (PET) film, a silica-deposited stretched polyethylene terephthalate film, an alumina-deposited stretched polyethylene terephthalate film, a stretched polybutylene terephthalate film, a stretched polyamide film, a stretched polypropylene film, or two or more of them. A composite film in which films are laminated can be used.

Preferably, the base material layer 61 is biaxially stretched. As a result, the molecules forming the base material layer 61 are aligned in the stretching direction by the stretching treatment, and the base material layer 61 exhibits excellent dimensional stability.

The thickness of such a base material layer 61 is formed to be, for example, about 1 to 50 μm. In this case, the product cost can be suppressed while satisfying the strength, rigidity, and the like required for the bag body 5. The base material layer 61 of the present embodiment also functions as the outermost layer of the laminated film 60 when the bag is made into the bag main body 5.

Further, as shown in FIG. 3, in the present embodiment, the pattern layer 62 containing the pattern is laminated on the surface of the base material layer 61 on the inner side of the container. Here, the pattern is a recording target of various modes that can be recorded or printed on the base material layer 61, and is not particularly limited, and a figure, a character, a pattern, a pattern, a symbol, a pattern, a mark, or the like can be printed. Widely included. In particular, in the laminated film 60 used for the bag body 5 intended to contain food, information such as a diagram of the contents, a product name of the contents, an expiration date, a manufacturing date, and a manufacturing number can be used as a pattern. The characters shown are used. However, the pattern layer 62 is laminated on the base material layer 61 according to the specifications of the product, and the pattern layer 62 may not be provided on the base material layer 61.

In the present embodiment, the pattern layer 62 is applied not to the outer surface of the base material layer 61 on the outer side of the container, but to the inner surface of the base material layer 61. In this case, since the pattern layer 62 is excellent in abrasion resistance, it can be effectively prevented from disappearing due to rubbing or the like, and falsification of the pattern can also be effectively prevented. Further, the base material layer 61 is transparent so that the pattern layer 62 laminated on the inner surface of the base material layer 61 can be visually recognized through the base material layer 61 when the bag is made into the packaging bag 1. It is preferable to do so.

As described above, the sealant layer 64 is provided for laminating the two laminated films 60 and heat-sealing the vicinity of the opposite edges so that the edges are bonded and sealed. Further, in the present embodiment, the sealant layer 64 is arranged on the side of the laminated film 60 that is the innermost side of the container (the side of the accommodating portion 2) when the bag is made into the bag main body portion 5.

Examples of such a sealant layer 64 include a film made of a polyolefin resin such as polyethylene (PEF), polypropylene, an ethylene-vinyl acetate copolymer, and an ethylene-propylene block copolymer, and a conventionally known easy peel film. Can be adopted. Further, as the sealant layer 64, a film such as an ionomer resin, an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, an ethylene-propylene copolymer, a methylpentene polymer, a polybutene polymer, and an acid-modified polyolefin resin can be used. It can also be adopted.
The sealant layer 64 may be formed as a single layer by the film made of these materials, or the sealant layer 64 may be formed as a multilayer.

In addition, unstretched polypropylene (CPP) can be used for the sealant layer 64. Further, as the sealant layer 64, a low density polyethylene film (LDPE) or a linear low density polyethylene (LLDPE) can be adopted from the viewpoint of impact resistance.
The thickness of the sealant layer 64 is preferably in the range of 10 μm or more and 200 μm or less. In this case, the packaging bag 1 is excellent in impact resistance against dropping that may occur in the distribution process, and is also excellent in handleability such as ease of filling the contents and ease of refilling the contents.

On the other hand, the intermediate layer 63 laminated between the base material layer 61 and the sealant layer 64 is provided to supplement various functions required for the packaging bag. As described above, the bag body 5 is a packaging bag suitable for containing food as a content. Therefore, the intermediate layer 63 has a vapor barrier property that prevents the permeation of water vapor and prevents the permeation of gas such as oxygen gas so that the content can be preserved while preventing deterioration such as oxidation of the content. It may have a gas barrier property. Further, the intermediate layer 63 may have bending resistance and impact resistance so that the packaging bag 1 can sufficiently withstand the impact when it is dropped from the product shelf. Further, the intermediate layer 63 may have a function of sufficiently enhancing the concealing property so that the contents of the packaging bag 1 cannot be seen in order to increase the purchasing motivation of the consumer.

Examples of the intermediate layer 63 having such a function include polyethylene terephthalate, polyamide, polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polycarbonate, polyvinyl alcohol, ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer Ken. A film such as a product can be used. Further, a film obtained by coating polyvinylidene chloride on the above-mentioned film or a film obtained by depositing an inorganic substance such as silicon oxide or aluminum oxide can be used. The thickness of such an intermediate layer 63 is preferably in the range of 5 μm or more and 200 μm or less.

Here, the intermediate layer 63 may be laminated in two or more layers via the bonding layer 65 described later, or one or more of the above-mentioned base materials may be used in combination.
Further, the intermediate layer 63 may be provided with a foamed resin layer via a bonding layer 65 in addition to the functional layer such as the barrier described above. The foamed resin layer has a function of improving the heat insulating property of the laminated film 60, and is composed of polyethylenes such as polyurethane, low density polyethylene, linear low density polyethylene, medium density polyethylene, and high density polyethylene, homopolypropylene, and random. It is formed of a film such as polypropylene such as polypropylene and block polypropylene, and copolymer resins such as ethylene-vinyl acetate copolymer and ethylene-propylene copolymer. For the foamed resin layer, for example, a chemical foaming method in which nitrogen gas or carbon dioxide gas is generated by azodicarbonamide, sodium hydrogencarbonate or the like, or a physical foaming method using gas such as carbon dioxide gas (carbon dioxide gas) or nitrogen gas is used. Is formed by
The thickness of the foamed resin layer is preferably in the range of 70 μm or more and 250 μm or less.
The foamed resin layer may be provided in the intermediate layer 63 closer to the base material layer 61 than the functional layer such as the barrier described above, and the sealant layer 64 may be provided more than the functional layer such as the barrier described above. It may be provided on the side.

As shown in FIG. 3, in the present embodiment, the bonding layer 65 is interposed between the base material layer 61 and the intermediate layer 63, and between the intermediate layer 63 and the sealant layer 64. When the intermediate layer 63 is composed of a plurality of functional layers, the bonding layer 65 is also interposed between the functional layers. As the bonding layer 65, for example, an adhesive generally used in a dry laminating method known per se can be used, and for example, a polyvinyl acetate adhesive, a polyacrylic acid ester adhesive, or a cyanoacrylate adhesive can be used. , Ethylene copolymer type adhesive, cellulose type adhesive, polyester type adhesive, polyamide type adhesive, amino resin type adhesive, epoxy type adhesive, polyurethane type adhesive and the like can be used.

For example, the laminated film 60 can be formed in order from the base material layer 61 side by the following layer structure.
1) Base material layer (biaxially stretched PET film) / picture layer / bonding layer / intermediate layer (metal (aluminum) vapor-deposited PET film) / bonding layer / sealant layer (polyethylene film)
2) Base material layer (biaxially stretched polyamide film) / picture layer / bonding layer / intermediate layer (metal (aluminum) vapor-deposited PET film) / bonding layer / sealant layer (polyethylene film)
3) Base material layer (biaxially stretched polybutylene terephthalate film) / pattern layer / bonding layer / intermediate layer (metal (aluminum) vapor-deposited PET film) / bonding layer / sealant layer (polyethylene film)
4) Base material layer (biaxially stretched PET film) / picture layer / bonding layer / intermediate layer (biaxially stretched polyamide film) / bonding layer / sealant layer (polyethylene film)
5) Base material layer (biaxially stretched PET film) / picture layer / bonding layer / intermediate layer (biaxially stretched polybutylene terephthalate film) / bonding layer / sealant layer (polyethylene film)

(Insulation adhesive member)
The heat insulating adhesive member 50 is a member having elasticity as well as adhesiveness and heat insulating properties, and as shown in FIGS. 1 and 2, the front surface film 21 (front surface portion) and the back surface film 22 (back surface portion) of the bag main body 5 are formed. ) Are provided in an area overlapping the accommodating portion 2 on the outer surface of each container. More specifically, the heat insulating adhesive member 50 includes a front surface side heat insulating adhesive member 50a and a back surface side heat insulating adhesive member 50b, and a region where the front surface side heat insulating adhesive member 50a and the back surface side heat insulating adhesive member 50b overlap the accommodating portion 2. The packaging bag 1 is provided so as to be in a plane-symmetrical position in the side view, in other words, the heat insulating adhesive members 50 are provided at positions overlapping on the front and back surfaces in the plan view.
Further, the heat insulating adhesive member 50 is provided so as to avoid an area overlapping the seal portion 4 and the planned seal portion 4a of the bag main body portion 5. The heat insulating adhesive member 50 of the present embodiment is formed in a substantially rectangular shape in a plan view and is a region overlapping the accommodating portion 2, and is a seal portion 4 (each of the upper seal portion 41 and the side seal portion 43) and a seal schedule. It is provided in a region separated by 2 mm or more from the portion 4a (lower seal portion 42).

When the bag is refrigerated or filled with frozen contents, the temperature of the bag body 5 itself becomes low, so that the hand (finger) of the user who handles the packaging bag is crushed and the bag cannot be held. In some cases, the contents could not be easily poured out from the spout, but as described above, the heat insulating adhesive member 50 is provided on the bag body 5, so that the user's hand (finger) is beaten. It is possible to suppress it as much as possible.
Specifically, the user grips the bag main body 5 through the heat insulating adhesive member 50 provided on the front surface film 21 (front surface) and the back surface film 22 (back surface) of the bag main body 5. The packaging bag 1 can be easily carried without being crushed.
In addition, after opening the injection port 3 of the packaging bag 1, the user crushes the accommodating portion 2 of the bag main body 5 with his / her hand (fingers) via the heat insulating adhesive member 50, so that the user feels his / her hand. The contents can be extruded from the spout 3 without any.

Here, in the vicinity of the seal portion 4 and the scheduled seal portion 4a of the bag main body portion 5 and the seal portion 4 and the scheduled seal portion 4a, even if the contents contained in the storage portion 2 are refrigerated or frozen. It is a part that is not easily affected by the temperature of the contents, and even if you grab such a part, it is very unlikely that your hand will be crushed, and the need for heat insulation is low. Therefore, as described above, the heat insulating adhesive member 50 is located in a region 2 mm or more away from the seal portion 4 and the planned seal portion 4a so as to avoid an region overlapping the seal portion 4 and the planned seal portion 4a of the bag main body portion 5. It is provided. As a result, it is possible to prevent the heat insulating adhesive member 50 from being provided on the front surface or the back surface of the bag body 5 more than necessary, and it is possible to prevent the cost of the packaging bag 1 from being increased.

The heat insulating adhesive member 50 includes a plurality of concave shapes 51 opened on both sides thereof. Since each of the plurality of concave shapes 51 acts as a fine suction cup, it is possible to exert an adhesive force (adhesive force) on the laminated films such as the front surface film 21 and the back surface film 22. Further, since the heat insulating adhesive member 50 has an adhesive surface (concave shape 51) exposed on the side opposite to the laminated film, the user's finger or the like slips when handling the packaging bag 1, and the packaging bag 1 It is possible to exert the so-called anti-slip effect of suppressing the failure to grasp the bag.
Further, the heat insulating adhesive member 50 causes the above-mentioned heat insulating function and elasticity due to the concave shape 51.
Further, the heat insulating adhesive member 50 has a reattachment property due to the concave shape 51. Therefore, the heat insulating adhesive member 50 can be peeled off from the laminated film and then reattached.

The heat insulating adhesive member 50 is formed by, for example, a manufacturing method described later using a liquid resin composition (acrylic emulsion) disclosed in JP-A-2017-36404. It is desirable that the thickness t of the heat insulating adhesive member 50 is 1 μm or more and 500 μm or less. If it is less than the lower limit of the thickness range, it becomes difficult to form the concave shape, or the size of the concave shape becomes too small, and the adhesive (adsorption) property deteriorates. Further, when the upper limit value of the thickness range is exceeded, the flexibility of the heat insulating adhesive member 50 is lowered, and the followability to the deformation of the bag body 5 which is the adherend is deteriorated.
Further, in order to evenly provide the concave shapes 51 on both sides of the heat insulating adhesive member 50, it is desirable that the thickness t of the heat insulating adhesive member 50 is in the range of 20 μm ≦ t ≦ 40 μm. This point will be described later.

The size and density of the concave shape 51 of the heat insulating adhesive member 50 can be adjusted by changing various conditions in the manufacturing process described later. For example, the heat insulating adhesive member 50 can use the density of the heat insulating adhesive member 50 as an index indicating the degree to which the concave shape 51 is included. The density of the heat insulating adhesive member 50 is not particularly limited, but may be, for example, 0.1 g / cm ³ or more and 0.6 g / cm ³ or less. The size of the concave shape 51 is not particularly limited, but can be, for example, 1 μm or more and 300 μm or less.
As shown in FIG. 4A, the heat insulating adhesive member 50 of the present embodiment has the peelable base sheets 55 and 56 attached to the front surface and the back surface thereof before being attached to the bag main body 5. Specifically, the first peelable base sheet 55 is attached to the front surface of the heat insulating adhesive member 50, and the second peelable base sheet 56 is attached to the back surface of the heat insulating adhesive member 50. It protects 50 adhesive surfaces. One of the peelable base material sheets 55 and 56 is peeled off from the heat insulating adhesive member 50 when it is attached to the bag body 5. The other peelable base material sheet is peeled off after the heat insulating adhesive member 50 is attached to the bag body 5.

As the releaseable base material sheets 55 and 56, various forms such as a conventionally known release film, separate paper, separate film, separate paper, release film, and release paper can be appropriately used. For example, high-quality paper, coated paper, impregnated paper, plastic film, or the like having a release layer formed on one side or both sides may be used. The release layer is not particularly limited as long as it is a material having releasability, but for example, silicone resin, organic resin modified silicone resin, fluororesin, aminoalkyd resin, melamine resin, acrylic resin, polyester resin and the like. Can be mentioned. As these resins, any of emulsion type, solvent type and solvent-free type can be used. When a release film provided with a release layer is used, for example, a silicone release type PET (polyethylene terephthalate) film, an untreated PET film, a PP film, a silicone release type paper, or the like can be used.

The thickness of the peelable base sheets 55 and 56 is preferably, for example, 10 μm or more and 100 μm or less, and more preferably 20 μm or more and 60 μm or less. If it is less than the lower limit of the above thickness range, there is no stiffness and it becomes difficult to peel off. Further, if the upper limit value of the thickness range is exceeded, the stiffness is too strong and the workability at the time of pasting is lowered.
Commercially available peelable base sheets 55 and 56 may be used. For example, a 38 μm-thick polyester film (Mitsui Chemicals Tohcello) in which one side is easily peeled with a silicone-based release agent. Made by Co., Ltd., trade name: SP-PET-01) and the like.

FIG. 4 is a diagram showing an example of a method of providing the heat insulating adhesive member 50 on the bag main body 5.
As shown in FIG. 4A, the heat insulating adhesive member 50 described above includes the peelable base materials 55 and 56. When the heat insulating adhesive member 50 is attached to the bag body 5, the peelable base sheet 56 is peeled off (FIG. 4 (b)). Then, the exposed adhesive surface of the heat insulating adhesive member 50 is attached to the outer surface of the container of the bag main body 5, and an appropriate pressure is applied to the surface, so that a large number of the exposed heat insulating adhesive member 50 is present on the exposed surface of the heat insulating adhesive member 50. When the concave shape 51 is elastically deformed, it is attracted (adhesive) to the bag body 5 by the same action as that of a conventional micro suction cup (FIG. 4 (c)).
That is, due to the elastic deformation around the concave shape 51, a force is applied to the concave shape 51 to return to the original shape from the deformed state. Due to this force, the closed space in the concave shape 51 becomes a negative pressure, and a suction action to the bag main body 5 is generated. Although the suction force of the concave shape 51 alone is weak, the necessary suction force can be secured as a whole because a large number of concave shapes 51 are formed. Further, when the heat insulating adhesive member 50 is manufactured, the adhesive force (adhesive force) of the heat insulating adhesive member 50 can be adjusted by adjusting the amount including the concave shape 51 as a parameter, for example, the density.
Finally, the peelable base sheet 55 is peeled off from the heat insulating adhesive member 50 attached to the bag body 5.
The heat insulating adhesive member 50 may be attached to the bag main body 5 manually by an operator, or may be automatically attached by a dedicated device.

Next, a method of manufacturing the heat insulating adhesive member 50 will be described.
FIG. 5 is a diagram showing a manufacturing apparatus for the heat insulating adhesive member 50.
FIG. 6 is a diagram illustrating a method of manufacturing the heat insulating adhesive member 50.

First, the composition of the acrylic emulsion disclosed in JP-A-2017-36404 for forming the heat insulating adhesive member 50 is put into a stirrer, and the composition is stirred while mixing nitrogen gas into the composition. A bubble-containing composition 150 is prepared by including bubbles in the composition (P1: whipping step in the figure).

Next, the bubble-containing composition 150 is coated on the peelable base material sheet 55 (P2 in the figure: coating step). In the coating step, for example, a comma coater can be used, but other known coating methods may be used.

After the bubble-containing composition 150 is coated on the peelable base material sheet 55, the bubble-containing composition 150 is dried while being heated to form a heat-insulating adhesive member 50 (P3: drying step in the figure). In the drying step, for example, a drying furnace having a temperature of about 60 ° C. to 140 ° C. can be used. As the drying time, for example, about 30 seconds to 10 minutes can be exemplified. Further, in the drying step, drying may be promoted while blowing air on the bubble-containing composition 150. By performing the drying step, concave shapes 51 are formed on both surfaces of the bubble-containing composition 150, and the heat insulating adhesive member 50 is formed. The concave shape 51 is formed by breaking bubbles contained in the bubble-containing composition 150 and leaving a part of the shape of the bubbles. Here, if the bubbles burst in a state where the bubble-containing composition 150 is insufficiently cured, the concave shape 51 is unlikely to remain. On the other hand, if the bubble-containing composition 150 is cured before the bubbles burst, the concave shape 51 may not be formed. Therefore, it is desirable that the drying step is performed under the condition that the foam is broken while the bubble-containing composition 150 is cured to some extent. Therefore, the temperature and the amount of air blown in the drying step have a great influence on the state of the concave shape 51.

After forming the heat insulating adhesive member 50 by the drying step, the separately prepared peelable base material sheet 56 is joined to the heat insulating adhesive member 50 (P4: laminating step in the figure). In this laminating step, since laminating is performed by the adsorption force (adhesive force) of the concave shape 51 of the heat insulating adhesive member 50, heating is not required, and bonding is possible with only a slight pressing force.

When the laminating step is completed, the heat insulating adhesive member 50 whose adhesive surface is covered with the peelable base materials 55 and 56 is completed.
The heat insulating adhesive member 50 may be formed directly on the outer surface of the container (the surface on the base material layer 61 side) of the front surface film 21 and the back surface film 22 constituting the bag main body 5. .. For example, the above-mentioned bubble-containing composition 150 is applied to a predetermined region of the front surface film 21 and the back surface film 22 in a pattern according to the outer shape of the heat insulating adhesive member 50a and the heat insulating adhesive member 50b, and dried. By curing, the heat insulating adhesive member 50 can be formed directly on the front surface film 21 and the back surface film 22. As a result, the above-mentioned peelable base material sheet can be omitted, and costs such as material costs related to the packaging bag 1 can be reduced.

Next, an example in which the heat insulating adhesive member 50 of the present embodiment is actually manufactured will be shown, and the result of comparison with the member of the comparative example will be described.
In the heat insulating adhesive member 50 of the embodiment, the bubble-containing composition 150 having undergone the whipping step is applied onto the releasable base sheet 55 on a biaxially stretched PET film having a releasability using a comma coater having a clearance of 200 μm. did. This was dried in a drying path at 100 ° C. for 1 minute to form a heat insulating adhesive member 50, and a peelable base sheet 56 similar to the peelable base sheet 55 was laminated. The density of the heat insulating adhesive member 50 in this case was 0.39 g / cm ³ , and the thickness was 50 μm.
FIG. 7 is an enlarged photograph of the adhesive surface of the heat insulating adhesive member 50 of the embodiment as viewed from the front direction.
FIG. 8 is an enlarged view in a cross section in a direction orthogonal to the sheet surface of the heat insulating adhesive member 50 of the embodiment.
As shown in FIGS. 7 and 8, it can be confirmed that a large number of concave shapes 51 are formed on the heat insulating adhesive member 50.

As Comparative Example 1, a heat insulating adhesive member produced in the same manner as in the above-mentioned Example was produced except that the whipping step was not performed. The density of the heat insulating adhesive member after production was 0.87 g / cm ³ , and the thickness was 100 μm.
As Comparative Example 2, an acrylic resin manufactured by Soken Chemical Co., Ltd .: SK2094 was used to prepare a heat insulating adhesive member (referred to as acrylic adhesive A type).
As Comparative Example 3, a heat insulating adhesive member (referred to as acrylic adhesive B type) was prepared using SK1502C manufactured by Soken Chemical Co., Ltd., which is an acrylic resin.

The above four types of heat insulating adhesive members were prepared, and the peeling force was compared.
FIG. 9 is a diagram showing peeling force of Examples and Comparative Examples.
The peeling force was measured by peeling off one of the peelable base material sheets of the heat insulating adhesive members of the above-mentioned Examples and Comparative Examples, and attaching each heat insulating adhesive member to the adherend. The peeling force in FIG. 9 is the result of measuring the peeling force at that time by performing 180 ° peeling at a tensile speed of 300 mm / min using a tensile tester. The peeling force was measured immediately after pasting (0 hours) and 1000 hours after pasting.

In the examples, it can be seen that the peeling force can be relatively small both immediately after the sticking and after 1000 hours have passed. With this level of peeling force, it will not peel off naturally, and it can be easily peeled off by applying force to peel it off. Moreover, since the adsorption is performed by the concave shape 51, the heat insulating adhesive member 50 does not remain on the surface of the adherend after peeling, and the adhesive force (peeling force) of the heat insulating adhesive member 50 itself does not substantially change. , It was possible to re-paste.
In Comparative Example 1, small pieces can be peeled off with a relatively small peeling force, but in the case of a large size, a certain amount of force is required for peeling. In addition, after peeling, the adhesive layer remained on the surface of the adherend, and complete reattachment was impossible.
In Comparative Example 2, in the case of a large size, a certain amount of force is required for peeling, and it is possible to peel off immediately after pasting, but after 1000 hours, the peeling force has increased significantly. Therefore, it was difficult to peel it off manually, and if it was forcibly peeled off, the heat insulating adhesive member might be damaged.
In Comparative Example 3, the peeling force was too large immediately after sticking, and it was difficult to peel it by hand, or if it was forcibly peeled off, the heat insulating adhesive member might be damaged.
Further, neither of Comparative Example 2 and Comparative Example 3 was suitable for reattachment because a part of the adhesive material remained on the adherend and the adhesive strength was lowered after the peeling. ..

(Verification experiment on concave shape 51 of heat insulating adhesive member 50)
As described above, in the present invention, the concave shape 51 of the heat insulating adhesive member 50 has a great influence on the adhesive force. If the concave shape 51 is not evenly provided on both sides of the heat insulating adhesive member 50, the adhesive force (adhesive force) of one surface of the heat insulating adhesive member 50 may be lower or increased as compared with the other surface. There is. Further, since the concave shape 51 is evenly provided on both surfaces of the heat insulating adhesive member 50, the physical properties of the heat insulating adhesive member 50 become homogeneous, and the first peelable base sheet 55 and the second peelable base sheet 56 become uniform. It is also preferable in terms of exhibiting sufficient adhesive strength to both of the above and removability with the adherend. Since the concave shape 51 is evenly provided on both sides of the heat insulating adhesive member 50, it is possible to have a uniform heat insulating function in the entire heat insulating adhesive member 50. Further, one adhesive surface of the heat insulating adhesive member 50 exerts an adhesive force on the adherend (laminated film constituting the packaging bag 1) of the heat insulating adhesive member 50, and the other adhesive surface has a sufficient anti-slip function. Can be demonstrated.

In order to evenly provide the concave shape 51 on both surfaces of the heat insulating adhesive member 50, it is important to control the coating amount (thickness t) of the heat insulating adhesive member 50. In this regard, Japanese Patent Application Laid-Open No. 2017-36404 does not consider anything, and it is sufficient that a micro suction cup is simply formed. In JP-A-2017-36404, it is shown as a surface having a micro suction cup in FIG. 2 (FIG. 2 of JP-A-2017-36404) which is a cross-sectional photograph of Example 1 formed with a WET film thickness of 800 μm. Although a fine suction cup structure is formed in the part, the part shown as a surface peeled off from the glass substrate has a structure that seems to be a huge bubble that is incomparable to the previous fine suction cup structure. You can check it. That is, in the configuration of JP-A-2017-36404, a micro suction cup (corresponding to the concave shape 51 in the present embodiment) is formed on one surface of the adhesive layer, but a micro suction cup (corresponding to the concave shape 51 in the present embodiment) is formed on the other surface. The concave shape 51) is not substantially formed.

This point was also verified by the applicant.
As a verification experiment, samples of four types of adhesive layers were prepared, and the concave shapes 51 on both sides were observed by SEM. The samples are the following four types.
Sample 1: Thickness of heat insulating adhesive member t = 25 μm
Sample 2: Thickness of heat insulating adhesive member t = 30 μm
Sample 3: Thickness of heat insulating adhesive member t = 35 μm
Sample 4: Thickness of heat insulating adhesive member t ≒ 2000 μm
The thickness of the sample is the thickness after drying. Further, for Samples 1 to 3, the glass surface was coated with the bubble-containing composition after the foaming treatment using a coater, and the drying treatment was carried out using a drying oven at 100 degrees. Sample 4 was drip-coated on a glass surface and naturally dried at room temperature. The drying conditions of Sample 4 were changed in order to verify the description in JP-A-2017-36404 that drying at room temperature is sufficient. In each sample, the density of the adhesive layer after the foaming treatment was 0.4 g / cm ³ .

FIG. 10 is a diagram showing the observation results of Sample 1.
FIG. 11 is a diagram showing the observation results of Sample 2.
FIG. 12 is a diagram showing the observation results of Sample 3.
FIG. 13 is a diagram showing the observation results of the sample 4.
As shown in FIGS. 10 to 12, it was confirmed that the fine concave shapes 51 were uniformly formed on both sides of the samples 1 to 3 in which the thickness t of the heat insulating adhesive member was controlled.
On the other hand, in the thick sample 4 shown in FIG. 13, an extreme difference in the size of the concave shape 51 was observed between the dry surface and the glass side surface, which was the same as in FIG. 2 of JP-A-2017-36404. Results were obtained.
Therefore, in order to evenly provide the concave shapes 51 on both sides of the heat insulating adhesive member 50, it can be determined that the thickness t of the heat insulating adhesive member 50 is preferably in the range of 20 μm ≦ t ≦ 40 μm.

Here, regarding the state in which the concave shape 51 is evenly provided on both surfaces of the heat insulating adhesive member 50, it is desirable to satisfy the following relationship in more detail.
The average value of the diameters of each opening of the concave shape 51 that opens to one surface (the surface on the bag body 5 side) of the heat insulating adhesive member 50 is set to ^Dave ₁ , and the other surface (the side opposite to the bag body 5). When the average value of the diameters of the openings of the concave shape 51 that opens in (the surface of the surface) is set to ^Dave ₂ .
| D ^ave _1- D ^ave ₂ | / D ^ave ₂ ≤ 0.5
It is desirable to satisfy the relationship of.
Also,
| D ^ave _1- D ^ave ₂ | / D ^ave ₂ ≤ 0.25
It is even more desirable to satisfy the relationship.
By satisfying these relationships, it is possible to reduce the difference in adhesive strength between both sides of the heat insulating adhesive member 50, and also to have sufficient adhesive strength to the first peelable sheet 55 and the second peelable base sheet 56. The removability can be well expressed. Further, since the concave shape 51 is evenly provided on both sides of the heat insulating adhesive member 50, it is possible to have a uniform heat insulating function in the entire heat insulating adhesive member 50. Further, one adhesive surface of the heat insulating adhesive member 50 exerts an adhesive force on the adherend (laminated film constituting the packaging bag 1) of the heat insulating adhesive member 50, and the other adhesive surface exerts a non-slip function. can do.
Since it is practically impossible to obtain the average value of the diameters of all the openings as the average value of the diameters of the openings, here, the openings having a large diameter within the observation range of 1500 μm × 1100 μm. The diameters of the three openings were measured in order from the beginning, and the average value was used.

Here, the openings of the samples of FIGS. 10 to 13 were measured, and | D ^ave _1- D ^ave ₂ | / D ^ave ₂ was obtained. As a result, sample 1: 0.04 and sample 2: 0.06. , Sample 3: 0.12, Sample 4: 0.69.

The adhesive member of the present invention exhibits a suction cup adhesive function derived from having a large number of concave shapes. For this reason, the adhesiveness derived from the material of the adhesive member is relatively small, and the tackiness is lower than that of a normal adhesive member having no concave shape. Therefore, the adhesive surface is formed on the outermost surface of the packaging bag. Even in an exposed usage mode, it is possible to exhibit sufficient adhesiveness when adhering to the surface to be adhered while preventing stickiness of the adhesive surface. Therefore, it can be suitably used in a mode in which the adhesive surface is exposed as in the present invention.

As described above, the adhesiveness of the heat insulating adhesive member 50 can be adjusted depending on the conditions for forming the opening of the concave shape 51. Then, by changing the formation state of the opening of the concave shape 51 of the heat insulating adhesive member 50, two types of heat insulating adhesive members (classified as Type A and Type B) shown below are produced as a method of exhibiting the adhesive action. can do.
Type A: An adhesive member in which adhesive strength is exhibited by a suction cup action, and the adhesive strength of the adhesive itself also contributes to the adhesive strength. In this Type A adhesive member, the adhesiveness of the adhesive itself causes a slight "sticky" feel.
Type B: An adhesive member in which adhesive strength is developed by a sucking action, but the adhesive strength of the adhesive itself does not contribute to the adhesive strength, or the adhesive strength of the adhesive itself is not exhibited. In this Type B adhesive member, the adhesiveness of the adhesive itself does not act as an adhesive force, so that a "sticky" tactile sensation does not occur.

An inclined ball tack test (JIS Z 0237), which is an adhesive test effective for evaluating the above-mentioned "stickiness", was carried out on the above two types of adhesive members. The outline of the inclined ball tack test is as follows.
First, a test piece obtained by cutting the obtained adhesive member into a width of 25 mm and a length of 100 mm was prepared. Next, the test piece was set on a ball tack tester (manufactured by Tester Sangyo Co., Ltd.) so that the adhesive surface was the surface (the inclination angle of the adhesive surface was 30 °). Further, in an atmosphere of 23 ° C., the steel ball is rolled so as to pass through the measurement surface region of the adhesive surface of the test piece set in the ball tack tester (the length of the measurement surface is 100 mm). At this time, a steel ball having a diameter of 1/32 inch to 1 inch was used. Then, among the steel balls that stop in the region of the measurement surface when these steel balls are rolled, the value of the ball number having the maximum diameter is specified. The ball number is obtained by multiplying the diameter of the steel ball by 32. Each numerical value of the ball tack test below indicates the value of the ball number.
The results of the inclined ball tack test for the heat insulating adhesive member 50 of the present embodiment are shown below.
Type A: 9 (ball No. 9)
Type B: Since the adhesive itself is not sticky, all balls No. 1 or higher roll down. That is, the evaluation of ball tack is less than 1.
Since there are various forms of use as an adhesive member, it is not possible to simply give superiority or inferiority to Type A and Type B, and it is preferable to appropriately select them according to the form of use. Regarding Type A, considering the convenience of re-peeling and re-sticking, the ball tack test result is preferably 5 to 10, more preferably 6 to 9, and even more preferably 7 to 8.

In the packaging bag 1 of the above-described embodiment, since the adhesive surface of the heat insulating adhesive member 50 is exposed, a “sticky” feel is not desirable. Therefore, it is desirable to use the above-mentioned Type B as the heat insulating adhesive member 50.

As described above, in the packaging bag 1 of the present embodiment, since the heat insulating adhesive member 50 is provided in the accommodating portion 2 of the bag main body portion 5, when it is refrigerated or filled with frozen contents. , It is possible to significantly prevent the user's hand (fingers) handling the packaging bag from being crushed, making it impossible to hold the packaging bag, and making it impossible to easily pour out the contents from the spout.
Further, the packaging bag 1 of the present embodiment has a concave shape 51 on the surface side (opposite side of the bag body 5) of the heat insulating adhesive member 50, so that when the packaging bag 1 is carried, the hand slips and the packaging bag 1 is used. It is possible to suppress dropping 1.
Further, since the heat insulating adhesive member 50 of the packaging bag 1 of the present embodiment has an adhesive force due to the adsorption force of the concave shape 51, it has high reworkability, and even if the attachment fails, it can be easily reattached. Yes, it is easy to use. Further, after the packaging bag 1 is used, the heat insulating adhesive member 50 can be removed from the laminated film 60 without adhesive residue, and dust can be easily separated.
The packaging bag 1 of the present embodiment is provided at a position separated from the seal portion 4 and the planned seal portion 4a by 2 mm or more so as to avoid an area where the heat insulating adhesive member 50a overlaps the seal portion 4 and the planned seal portion 4a. Therefore, it is possible to prevent the heat insulating adhesive member 50 from being provided on the front surface or the back surface of the bag body 5 more than necessary, and it is possible to prevent the cost of the packaging bag 1 from being increased. Further, even when the heat insulating adhesive member 50 is formed on the front surface film 21 and the back surface film 22 before the heat sealing, the heat insulating adhesive member 50 does not overlap with the sealing portion 4, so that the upper sealing portion 41 and the lower sealing portion 42 , The side seal portion 43 can be uniformly formed.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made as in the modified forms described later, and these are also the present invention. It is within the technical scope. Moreover, the effects described in the embodiments are merely a list of the most preferable effects arising from the present invention, and the effects according to the present invention are not limited to those described in the embodiments. It should be noted that the above-described embodiment and the later-described modified form can be used in combination as appropriate, but detailed description thereof will be omitted.

(Transformed form)
(1) In the above-described embodiment, the packaging bag 1 has shown an example in which the spout 3 is provided at the upper portion, but the present invention is not limited to this, and for example, the spout 3 may be omitted. .. In this case, in order to open the packaging bag 1, for example, it is necessary to provide a notch such as a notch in the side seal portion 43 so that the upper seal portion 41 can be separated from the bag main body portion 5 and opened.

(2) In the above-described embodiment, the heat insulating adhesive member 50 is provided on the outer surface of the laminated film 60 (front surface film 21, back surface film 22) on the outer side of the container, but the present invention is limited to this. Instead, it may be provided between the base material layer 61 and the sealant layer 64 of the laminated film 60.

(3) In the above-described embodiment, the heat insulating adhesive member 50 provided on the bag main body 5 shows an example in which the adhesive surface on the side opposite to the laminated film 60 is exposed, but the present invention is limited to this. Not a thing. For example, the heat insulating adhesive member 50 provided on the bag main body 5 may be in a state in which a base material such as a peelable base material sheet 55 is attached to the adhesive surface on the side opposite to the laminated film 60.

(4) In the above-described embodiment, an example is shown in which one heat insulating adhesive member 50 is provided on each of the front surface film 21 and the back surface film 22, but the present invention is not limited to this, and for example, two or more sheets are provided. The heat insulating adhesive member 50 divided into the above may be provided in the area overlapping the accommodating portion 2.

1 Packaging bag 2 Storage part 3 Outlet 4 Seal part 5 Bag body part 21 Surface film (surface part)
22 Back side film (back side)
23 Side film 31 Upper 32 Lower 33 Side 41 Upper seal 42 Lower seal 43 Side seal 50 Insulation adhesive member 51 Concave shape 60 Laminated film 61 Base material layer 62 Picture layer 63 Intermediate layer 64 Sealant layer 65 Bonding layer

Claims (6)

An accommodating portion having a front surface portion and a back surface portion composed of a laminated film including at least a base material layer and a sealant layer and accommodating the contents, a sealing portion formed around the accommodating portion, and the accommodating portion. A bag main body having a planned seal part provided around the wall as needed, and
A packaging bag including a heat insulating adhesive member provided on the bag body.
The heat insulating adhesive member is provided in a region of the front surface portion and the back surface portion that overlaps at least a part of the storage portion in a plan view of the bag main body portion.
The heat insulating adhesive member has a plurality of concave shapes on both sides thereof.
The concave shape is evenly formed on both sides of the heat insulating adhesive member.
The average value of the diameters of the concave openings opened on the surface of the bag body is set to ^Dave _1, and the diameter of the concave openings opened on the surface opposite to the bag body. When the average value of is set to ^Dave ₂ ,
| D ^ave _1- D ^ave ₂ | / D ^ave ₂ ≤ 0.5
Packaging bag that meets the relationship. In the packaging bag according to claim 1,
The heat-insulating adhesive member is a packaging bag provided on the front surface portion and the back surface portion so as to be in a plane-symmetrical position in a side view of the bag main body portion. In the packaging bag according to claim 1 or 2.
The heat-insulating adhesive member is a packaging bag provided so as to avoid an area overlapping the seal portion and the planned seal portion in a plan view of the bag main body portion. In the packaging bag according to claim 3,
The heat insulating adhesive member is a packaging bag provided at a position separated from the sealing portion and the planned sealing portion by 2 mm or more. In the packaging bag according to any one of claims 1 to 4.
The heat insulating adhesive member is a packaging bag provided on the front surface portion and the back surface portion. The packaging bag according to any one of claims 1 to 5, wherein the chilled contents are stored in the storage unit.