JP2022043475A - Packaging bag - Google Patents

Abstract

To provide a resealable packaging bag without the use of a separate member for resealing a packaging bag.SOLUTION: In a packaging bag obtained by making heat-fusible resin layers of a two laminates having at least a base material layer, an intermediate layer, and a heat-fusible resin layer in this order face each other and joining heat-fusing portions disposed at the peripheral edge together, an opening is formed by cutting off a part or all of one side of the packaging bag. The base material layer or the intermediate layer consists of a paper base material, and the weight of the paper base material is 50 wt.% or more based on the total weight of the laminate excluding the weight of the metal foil. The opening is resealed by folding back the laminates so that the base material layers face each other.SELECTED DRAWING: Figure 2

Description

The present invention relates to a packaging bag, and more particularly to a packaging bag capable of opening a packaging bag to form an opening, taking out only a required amount of the contents, and then resealing the opening.

Conventionally, there is widely known a packaging bag in which a packaging bag in which the contents are stored and sealed and packaged can be opened, the contents can be taken out as much as necessary, and then the opening can be resealed. Such a resealable packaging bag can be taken out and resealed each time it is used, and it is not necessary to transfer it to another container or the like, which is convenient for consumers. It is a form. As such a resealable packaging bag, a packaging bag with an occlusal tool having an occlusal tool (chuck) attached to the opening of the packaging bag is widely known (see, for example, Patent Document 1). Also known is a packaging bag in which the resealing tape attached to the packaging bag with the opening of the packaging bag wrapped is peeled off from the surface of the bag body and adhered to the wound portion to reseal. (See, for example, Patent Document 2).

However, the packaging bag using the occlusion tool of Patent Document 1 requires a step of preparing a plastic occlusion tool and attaching the occlusion tool to the packaging bag, and there is a problem that the number of steps increases. In addition, since the occlusal tool is made of plastic, there is a problem that the amount of plastic material increases. The increase in plastic materials is unfavorable.

The packaging bag of Patent Document 2 requires a process of attaching a resealing tape to the packaging bag, and the problem of increasing the process and the increase in plastic material due to the use of the resealing tape are the same as in Patent Document 1. There are cost and environmental issues. Further, when the opening is resealed, the resealing tape must be peeled off from the packaging bag and attached to the opening, which is troublesome and troublesome for the user.

Special Publication No. 60-50663 Japanese Unexamined Patent Publication No. 8-207940

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a resealable packaging bag without using a separate member for resealing the packaging bag. ..

In order to achieve the above object, the present invention according to claim 1 is the heat-sealing resin of a laminate provided with at least a base material layer, an intermediate layer, and a heat-sealing resin layer in this order. A packaging bag in which layers are opposed to each other and joined by a heat-sealing portion provided on the peripheral edge, and an opening is formed by cutting out a part or all of one side of the packaging bag, wherein the base material is used. The layer or the intermediate layer is made of a paper base material, and the weight of the paper base material is 50% by weight or more with respect to the total weight of the laminated body excluding the weight of the metal foil, and the laminated body is bent to form the base. It is a packaging bag characterized in that the opening is resealed by facing the material layers to each other.

Further, in the present invention according to claim 2, in the packaging bag according to claim 1, the packaging bag has an upper heat-sealing portion, a lower heat-sealing portion, an upper heat-sealing portion, and the lower portion. A pillow type packaging bag having a back heat-sealing portion that intersects the heat-sealing portion, and the outer dimensions of the packaging bag in the direction in which the upper heat-sealing portion and the lower heat-sealing portion face each other are h. It is characterized in that the relationship of h ≦ w is satisfied when the outer dimension of the packaging bag in the direction orthogonal to the direction in which the upper heat-sealed portion and the lower heat-sealed portion face each other is w. ..

Further, in the present invention according to claim 3, in the packaging bag according to claim 1, the packaging bag has an upper heat-sealing portion, a lower heat-sealing portion, an upper heat-sealing portion, and the lower portion. A packaging bag having a side heat-sealing portion that intersects the heat-sealing portion, wherein the side heat-sealing portion is located at one of the left and right ends and faces the side heat-sealing portion. It is characterized in that a gusset portion formed by folding the laminated body inward in a fold shape is provided on the other end side of the above.

Further, in the present invention according to claim 4, in the packaging bag according to claim 1, the packaging bag has an upper heat-sealing portion, a lower heat-sealing portion, an upper heat-sealing portion, and the lower portion. A packaging bag having a side heat-sealing portion that intersects the heat-sealing portion, characterized in that the gusset portion formed by folding the laminate inward in a fold shape is provided on both the left and right sides. Is.

Further, according to the fifth aspect of the present invention, in the packaging bag according to the second aspect, the pillow type packaging bag has a side end heat fusion facing the back heat fusion portion at one of the left and right ends. It is characterized by having a landing portion and providing a hanging hole in the region of the side end heat fusion portion.

Further, the present invention according to claim 6 is the packaging bag according to claim 3 or 4, in the region of the upper heat-sealed portion or the lower heat-sealed portion, or the upper heat-sealed portion. It is characterized in that a hanging hole is provided in the region of the portion and the lower heat fusion portion.

The packaging bag of the present invention can provide a resealable packaging bag without using a separate member for resealing the packaging bag.

It is the schematic sectional drawing which shows an example about the laminated structure of the laminated body of the packaging bag which concerns on this invention. It is a front view and the back view which shows the 1st Embodiment of the packaging bag which concerns on this invention. It is explanatory drawing which shows the method of opening the packaging bag of 1st Embodiment of this invention, and then resealing. It is a front view which shows the 2nd Embodiment of the packaging bag which concerns on this invention, the sectional view and explanatory drawing which shows the resealed state. It is a front view and sectional drawing which shows the 3rd Embodiment of the packaging bag which concerns on this invention. It is a back view which shows the 4th Embodiment of the packaging bag which concerns on this invention. It is a front view which shows the 5th Embodiment of the packaging bag which concerns on this invention. It is a front view which shows the sixth embodiment of the packaging bag which concerns on this invention.

The present invention described above will be described in detail below with reference to drawings and the like.

FIG. 1 is a schematic cross-sectional view showing an example of the laminated structure of the laminated body of the packaging bag according to the present invention, FIG. 2 is a front view and a rear view showing a first embodiment of the packaging bag according to the present invention, and FIG. 3 is a front view. Explanatory drawing showing a method of opening the packaging bag of the first embodiment of the present invention and then resealing, FIG. 4 is a front view, a sectional view and a resealing state showing the second embodiment of the packaging bag according to the present invention. 5 is a front view and a sectional view showing a third embodiment of the packaging bag according to the present invention, FIG. 6 is a rear view showing a fourth embodiment of the packaging bag according to the present invention, and FIG. 7 is a book. A front view showing a fifth embodiment of the packaging bag according to the present invention, FIG. 8 is a front view showing a sixth embodiment of the packaging bag according to the present invention, and P1, P2, P3, P4, P5, P6 in the figure. Is a packaging bag, P1', P2'Opened packaging bag, 1 is a laminate, 2 is a heat-sealed part, 3 is a notch, 4 is a planned opening part, 5 is an opening, 6 is a hanging hole, and 7 is a cutout. One piece, 8 is a folding part, 8a is a first folding part, 8b is a second folding part, 9 is a content, 11 is a base material layer, 12 is an intermediate layer, 13 is a heat-sealing resin layer, and 14 and 15 are. The adhesive layer, 21 is the upper heat-sealing part, 22 is the lower heat-sealing part, 23 is the back heat-sealing part, 23a and 24a are the base parts, 24 is the side heat-sealing part, and 25 is the side end heat-sealing part. , G is the gusset part, h is the outer dimension in the vertical direction, w is the outer dimension in the left-right direction, and α is the interval.

FIG. 1 is a schematic cross-sectional view showing an example of a laminated structure of a laminated body of a packaging bag according to the present invention. As shown in FIG. 1, the laminated body 1 of the packaging bag of the present invention includes at least a base material layer 11, an intermediate layer 12, and a heat-sealing resin layer 13 in this order, and the heat-sealing resin of the laminated body 1 is provided. A packaging bag is produced by facing the heat-sealing resin layers 13 with the layer 13 inside and joining the peripheral edges with the heat-sealing portion 2 (see FIG. 2). Then, an opening is formed by cutting out a part or all of one side of the packaging bag.

After taking out as much of the contents filled in the packaging bag from the opening as necessary, the inside of the opening of the packaging bag is bent slightly inside the opening and the front and back laminates 1 are overlapped with each other, for example, to the front side of the packaging bag. By facing the base materials 11 of the laminated body 1 to each other, the opening is resealed.

In this resealing action, the base material layer 11 or the intermediate layer 12 is made of a paper base material, and the weight of the paper base material is 50% by weight or more with respect to the total weight of the laminate 1 excluding the weight of the metal foil. Therefore, the dead-holding property of the laminated body 1 (the property that when the laminated body is bent, it is held in the bent state and does not easily return to the original state) is obtained, and it becomes easy to reseal. be.

Excellent dead hold property can be obtained by making the laminate 1 mainly composed of a paper base material, and the opening can be easily resealed by bending the laminate 1, which is made of plastic such as an occlusion tool. It eliminates the need for separate components and can contribute to environmental issues such as the elimination or reduction of materials used from fossil fuels. Furthermore, by using a paper base material as the main component, the amount of plastic can be reduced, and when the packaging bag is disposed of, it is classified as paper for separate collection, so the unit price for recycling implementation based on the Containers and Packaging Recycling Law Can also be reduced.

High-quality paper, kraft paper, coated paper, or the like can be used as the paper base material of the laminate 1, and the basis weight is preferably 40 g / m ² to 120 g / m ² , preferably 40 g / m ² to 80 g / m ² . Is more preferable. It is important to select the basis weight of the paper base material so as to be 50% by weight or more with respect to the total weight of the laminated body 1, and when it is less than 50% by weight, the dead hold property of the paper of the laminated body 1 becomes It becomes difficult to maintain the state of the laminated body 1 which has been lowered and folded back, and the resealability is lowered.

As the base material layer 11 of the laminate 1, a synthetic resin film having excellent mechanical, physical, chemical and the like properties is used because it is a basic material constituting the packaging bag in addition to the paper base material. A film such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, nylon, cellophane, etc., or a polylactic acid-based biaxially stretched film derived from a plant as a starting material can be used. Alternatively, these films are coated with a barrier resin composition such as polyvinylidene chloride or polyvinyl alcohol to provide a barrier layer, or aluminum, aluminum oxide, silicon oxide, indium oxide, tin oxide, zirconium oxide and the like. An inorganic substance vapor-deposited and provided with a vapor-deposited layer can be used. Further, as these films, usually, the base material layer 11 is often printed, and printability is required. Therefore, a film stretched in the uniaxial direction or the biaxial direction is suitable. Further, the thickness of the film constituting the base material layer 11 may be a thickness that can be held to the minimum necessary for strength, rigidity, etc. as a basic material, and may be determined in consideration of cost and the like. Usually, it is about 9 to 50 μm.

The intermediate layer 12 is provided when light-shielding property or gas barrier property is required due to packaging conditions, transportation conditions, protective function conditions of contents, etc. in addition to the paper base material, and is used for the above-mentioned base material layer 11. A film to be used, a film provided with the barrier layer or a vapor-deposited layer described above, a metal foil such as aluminum or iron, or the like can be used. Further, one or more of these films may be combined and laminated. The thickness of the intermediate layer 12 is about 9 to 50 μm.

The heat-bondable resin layer 13 is preferably a layer formed of a heat-bondable resin that can be melted by heat and fused to each other, and may be appropriately selected and used depending on the quality required for the packaging bag. Low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear (linear) low-density polyethylene, polypropylene, ethylene-α-olefin copolymer, ethylene-propylene copolymer, ethylene-vinyl acetate It can be formed by using a resin such as a polymer, an ionomer, an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, an ethylene-acrylic acid ester copolymer, or an ethylene-methacrylic acid ester copolymer. .. The thickness of the heat-bondable resin layer 13 is usually about 15 to 60 μm.
In particular, as the required quality for packaging bags, for example, when the content is a supplement, a tablet confectionery containing a refreshing agent or a fragrance, a tablet confectionery such as a ramune confectionery, or a grain gum, the refreshing component or the fragrance component is contained in the heat-sealing resin layer 13. It is preferable that it has low adsorption property, which is difficult to be adsorbed. Examples of the heat-bondable resin layer 13 having low adsorptivity include a multilayer sealant film provided with a resin layer containing cyclic polyolefin and polyethylene (see JP-A-2017-13485). When the content is seaweed or the like having high hygroscopicity, a heat-sealing resin layer 13 having a hygroscopic effect is desirable so that the seaweed or the like does not easily impair the commercial value due to moisture absorption. Examples of such a heat-sealing resin layer 13 include a heat-sealing film containing a hygroscopic agent (see JP-A-2015-91721). Further, when the content is a product in which an oxygen scavenger is enclosed, for example, nuts, okaki, etc., the heat-sealing resin layer 13 having oxygen absorption is provided so that the flavor is not easily impaired by the oxidation of the content. preferable. Examples of such a heat-sealing resin layer 13 include a multilayer film provided with an oxygen-absorbing layer (see JP-A-2012-66646). In addition, when the contents are urethane masks, etc., if multiple masks are stored in the packaging bag, odor will be trapped in the packaging bag, which will make the user uncomfortable when opening, so it has a deodorizing effect. The heat-sealing resin layer 13 is desirable. Examples of such a heat-sealing resin layer 13 include a sealant film containing a deodorant such as hydrophobic zeolite (see JP-A-2012-512).

As a method of laminating the base material layer 11, the intermediate layer 12, and the heat-sealing resin layer 13, for example, a dry lamination method of laminating using a dry laminating adhesive such as a urethane-based adhesive, a polyethylene resin, or the like is thermally melt-extruded. Extruded lamination methods for laminating can be used, and it is preferable to form the adhesive layers 14 and 15 by these methods.

Further, the laminated structure of the laminated body 1 is not limited to the base material layer 11, the intermediate layer 12, and the heat-sealing resin layer 13, depending on the performance required for the packaging bag, and the base material layer 11 or the intermediate layer is not limited. 12, or the base material layer 11 and the intermediate layer 12 can be made into a plurality of layers to form a multilayer. In particular, when a paper base material is used as the intermediate layer 12, a film other than the paper base material is further used for the intermediate layer 12 between the paper base material and the heat-sealing resin layer 13, and the base material layer 11 / adhesive layer 14 is used. It is preferable to prevent deterioration of the barrier property by forming the structure of / intermediate layer 12 (paper base material) / adhesive layer / intermediate layer 12 (film) / adhesive layer 15 / heat-sealing resin layer 13.

Next, an embodiment of a packaging bag using the laminated body 1 described so far will be described. FIG. 2 is a front view and a rear view showing a first embodiment of the packaging bag P1 according to the present invention. As shown in FIG. 2, in the packaging bag P1, the heat-sealing resin layer 13 side of the rectangular laminated body 1 is set as the inner surface, and the heat-sealing resin layer 13 surfaces are opposed to each other at the end edge on the short side side to heat the back. Pillow type packaging that is joined by the fused portion 23 (2) and has a tubular shape with the long side open, and both ends of the opening are joined by the upper heat fused portion 21 (2) and the lower heat fused portion 22 (2). It is a bag. After one of the upper heat-sealing portion 21 (2) or the lower heat-sealing portion 22 (2) is joined, the contents are filled from the other opening, and the upper heat-sealing portion 21 (2) or the lower heat-sealing portion 21 (2) or the lower heat-sealing portion is filled. The other side of the landing portion 22 (2) is joined. The heat-sealing portion 2 includes an upper heat-sealing portion 21, a lower heat-sealing portion 22, and a back heat-sealing portion 23, each of which is described with (2). 2) is omitted.

The upper heat-sealing portion 21 and the lower heat-sealing portion 22, which are the heat-sealing portions 2 on the long side of the laminated body 1, are formed so as to face each other, and are the heat-sealing portions 2 on the short-side side of the laminated body 1. The back heat-sealing portion 23 intersects the upper heat-sealing portion 21 and the lower heat-sealing portion 22 and is formed substantially in the center. In FIG. 2B, the base portion 23a of the back heat-sealing portion 23 is located substantially in the center, the back heat-sealing portion 23 is tilted to the right in the left-right direction with the base 23a as an axis, and the end edge is on the right side. positioned. Further, the outer dimensions of the packaging bag P1 in the direction in which the upper heat-sealing portion 21 and the lower heat-sealing portion 22 face each other are h, and the direction perpendicular to the direction in which the upper heat-sealing portion 21 and the lower heat-sealing portion 22 face each other. When the outer dimension of the packaging bag P1 is w, it is characterized by having a wide width that satisfies the relationship of h ≦ w. The upper heat-sealing portion 21 and the lower heat-sealing portion 22 of the packaging bag P1 are provided with a notch 3 as a means for starting the opening of the packaging bag P1. The notch 3 shows an example of an I notch, but the shape is not limited, and a V notch, a UV notch, or the like can be used. Further, the notch 3 may be either the upper heat-sealing portion 21 or the lower heat-sealing portion 22. The notch 3 is preferably provided on the side where the back heat-sealing portion 23 is tilted, and the resealability of the opened packaging bag P1'described later is further improved.

Next, a method of opening and a method of resealing the packaging bag P1 will be described with reference to FIG. FIG. 3 (a) shows an example of an opening method, (b) and (c) show an example of a resealing method, and (d) shows a sectional view taken along line AA of (c). Further, FIG. 3 shows the packaging bag P1 rotated by 90 ° to the right for convenience, and the right side shows the upper side and the left side shows the lower side. The packaging bag P1 tears the laminate 1 to the left and right of the notch 3 so as to be parallel to the back heat-sealing portion 23 with the short side (right side in FIG. 3) facing up to form the opening 5. The required amount of the content 9 is taken out from the opening 5 of the opened packaging bag P1'. After that, the corners of the upper heat-sealed portion 21 side and the lower heat-sealed portion 22 side of the opening 5 are folded inward to form the triangular first folded portion 8a, respectively, and a part of the opening 5 is formed. Reseal. Further, the remaining opening 5 side is folded on the back heat fusion portion 23 side so as to overlap the back heat fusion portion 23, and the second folding portion 8b is formed. Then, as shown in FIGS. 3 (c) and 3 (d), the back heat-sealed portion 23 is formed of the folded back heat-sealed portion 23 and the laminated body 1 on the opening 5 side connected to the back heat-sealed portion 23. The second folding portion 8b is inserted into the gap, and the opening 5 of the opened packaging bag P1'is resealed by locking the second folding portion 8b. The resealing method is shown as an example, and the formation of the first folding portion 8a may be omitted, and the resealing may be performed only by the second folding portion 8b.

In the above resealing method, the structure of the laminated body 1 is such that the base material layer 11 or the intermediate layer 12 is made of a paper base material, and the weight of the paper base material is 50% by weight or more with respect to the total weight of the laminated body 1. By doing so, it is possible to impart excellent dead-holding property to the laminated body 1, and since the laminated body 1 can be held in a bent state with the base material layers 11 facing each other, resealing is possible. As a result, the convenience of resealing can be imparted without using a separate member such as an occlusion tool (chuck), a resealing tape, and a rubber band. Further, it is preferable that the grain of the paper base material is oriented in parallel with the heat-sealed portion 23 on the back surface, and more excellent dead hold property can be obtained.

4A and 4B show a second embodiment of the packaging bag according to the present invention, in which (a) is a front view, (b) is a sectional view taken along line BB, and (c) is a state in which the opening is resealed. It is explanatory drawing which shows. As shown in FIG. 4, the packaging bag P2 is a three-way seal bag provided with an upper heat-sealing portion 21 (2), a lower heat-sealing portion 22 (2), and a side heat-sealing portion 24 (2). be. The side heat-sealing portion 24 is located at one of the left and right ends, is formed so as to intersect the upper heat-sealing portion 21 and the lower heat-sealing portion 22, and is formed on the left and right sides facing the side heat-sealing portion 24. It is configured to have a gusset portion G formed by folding the laminated body 1 inward in a fold shape on the end side of the above. A planned opening portion 4 for forming an opening 5 is provided from a position closer to the side heat-sealing portion 24 side than the right end of the gusset portion G of the upper heat-sealing portion 21 to the left end of the gusset portion G. Although the planned opening portion 4 is indicated by a two-dot chain line, it is preferable to indicate the opening position to the user by printing characters or printing the scheduled opening portion. The planned opening portion 4 may be provided below the upper heat-sealing portion 21 over the entire width on the left and right. The planned opening portion 4 may be opened by applying a half cut to the laminated body 1. Alternatively, the laminate 1 can be opened by cutting it with scissors or the like.

The laminated body 1 is cut out from the planned opening portion 4, and the opening 5 is formed in the packaging bag P2. After that, the opening 5 can be resealed by integrally folding the front and back laminated bodies 1 at appropriate positions closer to the inside than the opening 5 to form the folded portion 8. FIG. 4 (c) shows a state in which the opening 5 of the opened packaging bag P2'is resealed.

FIG. 5 is a front view showing a third embodiment of the packaging bag according to the present invention and a cross-sectional view taken along the line CC. As shown in FIG. 5, in the packaging bag P3, the upper heat-sealing portion 21 (2), the lower heat-sealing portion 22 (2), the upper heat-sealing portion 21 (2), and the lower heat-sealing portion 22 ( It is configured to include side heat-sealing portions 24 (2) intersecting with 2), and gusset portions G formed by folding the laminated body 1 inward in a fold shape on both left and right sides. The side heat-sealing portion 24 is located substantially in the center in the left-right direction, but the present invention is not limited to this, and the side heat-sealing portion 24 can be provided at any position in the left-right direction. The part to be opened 4 is the upper part of the gusset part G on either side from the space between the inner end of the gusset part G on one side and the inner end of the gusset part G on the other side of the upper heat fusion part 21. It is provided up to the edge below the heat-sealing portion 21. More specifically, in the upper heat-sealing portion 21, the inner edge of the gusset portion G on the side where the planned opening portion 4 is formed and the side heat-sealing portion on the side opposite to the side where the side heat-sealing portion 24 is tilted. The opening starting point is provided within the range of the distance α from the base 24a of the 24. That is, since the positions where the front and back laminated bodies 1 overlap each other within the range of this interval α, it is easy to form the opening 5, which is preferable. Although the planned opening portion 4 is indicated by a two-dot chain line, it is preferable to indicate the opening position to the user by printing characters or printing the scheduled opening portion. The planned opening portion 4 may be opened by applying a half cut to the laminated body 1. Alternatively, the laminate 1 can be opened by cutting it with scissors or the like.

The resealing method is the same as that of the opened packaging bag P2'of the second embodiment, and the description thereof will be omitted.

FIG. 6 is a rear view showing a fourth embodiment of the packaging bag according to the present invention. It is a modification of the packaging bag P1 of the first embodiment, and the packaging bag P4 of the fourth embodiment is a pillow type packaging bag, and the back heat fusion portion 23 is attached to one of the left and right ends (right side in FIG. 4). Further, a side end heat fusion portion 25 is provided so as to face the surface. Both ends of the side end heat-sealing portion 25 are connected to the upper heat-sealing portion 21 and the lower heat-sealing portion 22, respectively. A notch 3 is provided slightly inside the heat-sealed portion 25 at the side end. Further, a suspension hole 6 is provided at substantially the center in the vertical direction in the region of the side end heat fusion portion 25. The hanging hole 6 is convenient because it can be sold even when it is hung at the store. The back heat-sealed portion 23 is tilted toward the side end heat-sealed portion 25. The opening method and the resealing method are the same as those in the first embodiment.

FIG. 7 is a front view showing a fifth embodiment of the packaging bag according to the present invention, and the packaging bag P5 has a configuration in which a hanging hole 6 is provided in the region of the upper heat-sealing portion 21. Other than that, it is the same as the packaging bag P2 of the second embodiment. In the packaging bag P5, the suspension hole 6 may be provided in the region of the lower heat-sealing portion 22, or may be provided in the region of the upper heat-sealing portion 21 and the lower heat-sealing portion 22, respectively. can.

FIG. 8 is a front view showing a sixth embodiment of the packaging bag according to the present invention, and the packaging bag P6 has a configuration in which a hanging hole 6 is provided in the region of the upper heat-sealing portion 21. Other than that, it is the same as the packaging bag P3 of the third embodiment. In the packaging bag P6, the suspension hole 6 may be provided in the region of the lower heat-sealing portion 22, or may be provided in the region of the upper heat-sealing portion 21 and the lower heat-sealing portion 22, respectively. can.

It should be noted that the embodiments described so far are examples of typical examples of the packaging bag according to the present invention, and the packaging bag according to the present invention is not limited to this, and the gist of the present invention is expressed. Items in the category that do not deviate, four-sided seal bags, self-standing bags, etc. are all included in the present invention.

[Example 1]
Deodorant including high-quality paper 50 g / m ² (KAM) as the base material layer 11, aluminum foil (ALM) with a thickness of 7 μm as the intermediate layer 12, and hydrophobic zeolite with a thickness of 30 μm as the heat-sealing resin layer 13. After drying using the provided linear low density polyethylene (LLDPE) as the adhesive layers 14 and 15, a two-component curable dry lami adhesive composed of a main agent mainly composed of polyester polyol and a curing agent mainly composed of isocyanate. A coating amount of 3 g / m ² was formed and laminated by a dry laminating method (DL) to obtain a laminated body of <KAM 50 g / m ² / DL 3 g / m ² / ALM 7 μm / DL 3 g / m ² / LLDPE 30 μm>.
[Example 2]
The configuration is the same as that of Example 1 except that a coextruded film having low adsorptivity made of low-density polyethylene containing a cyclic olefin copolymer having a thickness of 30 μm and linear low-density polyethylene was used as the heat-sealing resin layer 13. Was obtained.
[Example 3]
Example 1 except that a hygroscopic coextruded film composed of a hygroscopic resin composition containing calcium oxide in a polyethylene resin having a thickness of 30 μm and linear low-density polyethylene was used as the heat-sealing resin layer 13. A laminated body having the same structure as that of the above was obtained.
[Example 4]
Example 1 except that high-quality paper 60 g / m ² (KAM) was used as the base material layer 11 and a 12 μm-thick aluminum-deposited polyethylene terephthalate film (VMPET) having an aluminum-deposited layer with a thickness of 40 nm on one side was used as the intermediate layer 12. In the same manner as above, a laminate of <KAM 60 g / m ^{2 / DL 3 g / m 2 /} VMPET 12 μm / DL 3 g / m ² / LLDPE 30 μm> was obtained.
[Example 5]
A laminate having the same structure as that of Example 4 was obtained except that the heat-sealing resin layer 13 used in Example 2 was used.
[Example 6]
A laminate having the same structure as that of Example 4 was obtained except that the heat-sealing resin layer 13 used in Example 3 was used.

In the laminated bodies of Examples 1 to 3, the weight of the paper base material is about 59% by weight with respect to the total weight of the laminated body, and in the laminated bodies of Examples 4 to 6, the weight of the paper base material is the laminated body. It is about 54% by weight with respect to the total weight of. In the present invention, the weight of the paper base material is 50% by weight or more with respect to the total weight of the laminate excluding the weight of the metal foil, and the weight ratio thereof is calculated as follows. When the laminated body has a metal foil, the weight ratio of the paper base material is calculated by using the weight of the laminated body excluding the weight of the metal foil as the total weight. Examples 1 to 3 correspond to this. If there is no metal leaf in the laminate, the weight of the laminate is used as the total weight. Examples 4 to 6 correspond to this.

Next, using the laminates of Examples 1 to 6 prepared above, a wide pillow type packaging bag of the first embodiment shown in FIG. 2 was prepared. The size is as follows.
Vertical outer dimensions h: 70 mm
Left and right outer dimensions w: 110 mm
Seal width of upper heat-sealed portion 21 and lower heat-sealed portion 22: 8 mm
Seal width of back heat-sealed portion 23: 10 mm
I-notch formation position: 10 mm from the right end of the upper heat-sealed portion as seen from the back surface Direction to tilt the inner back heat-sealed portion 23: I-notch forming side Pillow type produced using the laminates of Examples 1 to 6. The packaging bag P1 of the above is opened from the notch 3, and the formed opening 5 is bent by the procedure shown in FIG. The resealability of the opened packaging bag P1'was evaluated by inserting the second folding portion 8b into the gap formed by the heat fusion portion 23 and visually observing the locked state of the second folding portion 8b. As a result, all of the pillow type packaging bags P1 using the laminates of Examples 1 to 6 were maintained in the locked state and had good resealability.

Next, using the laminated body of Examples 1 to 6, the upper heat-sealed portion 21 of the second embodiment shown in FIG. 4, the lower heat-sealed portion 22, and the side heat-sealed portion 24 are provided, and the sides are provided. The heat-sealing portion 24 is located at one of the left and right ends, and a packaging bag P2 having a gusset portion G on the other end side of the left and right facing the portion 24 is manufactured. The size is as follows.
Top and bottom outer dimensions: 110 mm
Left and right outer dimensions: 80 mm
Seal width of each heat fusion part: 8 mm
Unfolded gusset size: 24 mm
Scheduled opening part: A gusset part G was provided at the upper left corner at a position straddling the left and right.

The package P2 was opened by cutting out a planned opening portion, and the formed opening 5 was bent by the procedure shown in FIG. 4, and the resealability of the opened packaging bag P2'was evaluated. As a result, all of the packaging bags P2 using the laminates of Examples 1 to 6 were maintained in the locked state and had good resealability.

P1, P2, P3, P4, P5, P6 Packaging bag P1', P2'Opened packaging bag 1 Laminated body 2 Heat-sealed part 3 Notch 4 Scheduled opening part 5 Opening part 6 Hanging hole 7 Cutting piece 8 Folding part 8a 1st folding part 8b 2nd folding part 9 Contents 11 Base material layer 12 Intermediate layer 13 Heat-sealing resin layer 14, 15 Adhesive layer 21 Upper heat-sealing part 22 Lower heat-sealing part 23 Back heat-sealing part 23a , 24a Base 24 Side heat fusion 25 Side end heat fusion G Gasset h Vertical outer dimensions w Left and right outer dimensions α spacing

Claims (6)

At least, in a packaging bag in which the heat-sealing resin layers of a laminate having a base material layer, an intermediate layer, and a heat-sealing resin layer are opposed to each other and joined by a heat-sealing portion provided on the peripheral edge thereof. A packaging bag in which an opening is formed by cutting out a part or all of one side of the packaging bag.
The base material layer or the intermediate layer is made of a paper base material, and the base material layer or the intermediate layer is made of a paper base material.
The weight of the paper base material is 50% by weight or more with respect to the total weight of the laminated body excluding the weight of the metal foil.
A packaging bag characterized in that the opening is resealed by bending the laminate so that the base material layers face each other. The packaging bag is a pillow type packaging bag including an upper heat-sealing portion, a lower heat-sealing portion, and a back heat-sealing portion that intersects the upper heat-sealing portion and the lower heat-sealing portion. ,
The outer dimensions of the packaging bag in the direction in which the upper heat-sealed portion and the lower heat-sealed portion face each other are h, and the direction perpendicular to the direction in which the upper heat-sealed portion and the lower heat-sealed portion face each other. The packaging bag according to claim 1, wherein the relationship of h≤w is satisfied when the outer dimensions of the packaging bag are w. The packaging bag is a packaging bag including an upper heat-sealing portion, a lower heat-sealing portion, and a side heat-sealing portion that intersects the upper heat-sealing portion and the lower heat-sealing portion. The side heat-sealed portion is located at one of the left and right ends, and a gusset portion formed by folding the laminated body inward in a fold shape is provided on the left and right other end sides facing the side heat-sealed portion. The packaging bag according to claim 1, wherein the packaging bag is provided. The packaging bag is a packaging bag including an upper heat-sealing portion, a lower heat-sealing portion, and a side heat-sealing portion that intersects the upper heat-sealing portion and the lower heat-sealing portion. The packaging bag according to claim 1, further comprising a gusset portion formed by folding the laminated body inward in a fold shape on both the left and right sides. The pillow type packaging bag further has a side end heat fusion portion facing the back heat fusion portion at one of the left and right ends, and has a hanging hole in the region of the side end heat fusion portion. 2. The packaging bag according to claim 2. 3. Item 4. The packaging bag according to item 4.

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