JP2003081291A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pillow-type packaging bag which can be easily re-sealed by folding an unsealed edge to cause a folded portion to be glued after the bag is unsealed and contents are removed. SOLUTION: The pillow-type bag comprises a laminate including a base layer and a thermally adhesive resin layer, and is formed of a hot-glued butt- seam and a hot-glued edge. One of ends of the butt-seam is extended outward by a predetermined size to form a butt-seam extension, and an adhesive layer is formed on an external surface of the laminate constituting the packaging bag opposite to the butt-seam extension or an internal surface of the butt-seam extension. The packaging bag is constituted such that the butt-seam extension is cut off or the hot-glued butt-seam is folded reversely to have the adhesive layer exposed after the bag is unsealed, and thereafter a folded portion is glued by folding an opening so that the bag can be re-sealed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pillow type packaging bag which can be resealed after the contents are opened and the contents are taken out.

[0002]

2. Description of the Related Art Conventionally, as a packaging bag made of a plastic film whose opening portion can be resealed so that it can be conveniently used for dispensing contents, a plastic fastener is attached to the opening of the opening. Although the structure is known, the resealable packaging bag to which a fastener is attached has a drawback that the step of attaching the fastener to the plastic film by heat bonding is complicated and the cost is increased.

Further, as a packaging bag in which the opened mouth portion can be resealed by using an adhesive without using a fastener, there is a packaging bag as shown in Japanese Utility Model Laid-Open No. 6-65241. Which has an adhesive layer on the outer surface thereof and a release paper adhered to the surface of the adhesive layer, or a resealing tape as shown in JP-A-8-207940, which is releasably attached to the outer surface of the packaging bag. However, it is difficult to provide the adhesive layer and release paper in the former packaging bag so as to adapt to the amount of contents remaining in the packaging bag when resealing the area and position of the adhesive layer and release paper. However, the latter packaging bag has a drawback that it takes time to peel off and attach the resealing tape when resealing. Further, there is a drawback that the release paper attached to the surface of the pressure-sensitive adhesive layer may peel off or the resealing seal may drop off during the handling of the packaging bag.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to open a packaging bag, take out the contents, and then bend and press the opening of the opened packaging bag to bond the bent portion to the outer surface of the packaging bag. The purpose is to provide a pillow type packaging bag that can be easily resealed.

[0005]

A packaging bag comprising a laminated body having a base material layer and a heat-adhesive resin layer, the bag being formed by a joint thermal bonding portion and an edge thermal bonding portion, wherein By wrapping one of the edges outwardly by a predetermined dimension to form a palm-arranging portion extension piece, and forming a pressure-sensitive adhesive layer on the outer surface of the packaging bag facing the palm-arranging portion extension piece After opening the bag and taking out the contents, fold back the palm extension part to the opposite side to expose the adhesive layer, and then fold and press the opening of the packaging bag with the adhesive layer inside. Only by this, the bent portion can be adhered to the outer surface of the packaging bag by the adhesive layer and the opening can be easily resealed.

In the above-mentioned packaging bag, the extending portion of the gas palm section is formed at the edge which is the upper side when bent so as to come into contact with the outer surface of the packaging bag of the gas-sealing heat-bonding section.
Since the heat-adhesive resin layer is not on the surface when forming the edge heat-adhesive portion, the workability of bag making is improved and the design of the packaging bag is also excellent.

In the above-mentioned packaging bag, by forming a cut line parallel to the gas-sealing heat-bonded portion on the gas-sealing part extension piece along the outer end of the gas-sealed heat-bonded portion, the gas-sealing part is formed at the cut line. Since the extension piece can be cut off to expose the pressure-sensitive adhesive layer, it becomes easy to wind and fold the opening and reseal.

In the above-mentioned packaging bag, since the cutout or a large number of scratches are formed on the outer end of the extending portion of the palm-arranging portion, the extending portion of the joint-sealing portion serves as a joint-sealing heat-bonding portion from the location of the cutout or the scar. The adhesive layer can be exposed in the area necessary to reseal the packaging bag by tearing in the direction of the right angle and then tearing it upward along the score line to cut off the extending portion of the gastric section, so that the opening can be exposed. Can be folded and reopened easily.

In the above packaging bag, the pressure-sensitive adhesive layer is made of a pressure-sensitive adhesive composition containing a polyester polymer having a carbonate structure as a main component, and the base material layer of the laminate is made of biaxially stretched polyethylene terephthalate. When the resin layer is made of polyethylene or polypropylene, the pressure-sensitive adhesive composition containing a polyester polymer having a carbonate structure as a main component is well adhered to biaxially oriented polyethylene terephthalate and is adhered to polyethylene or polypropylene. It is difficult to remove and has peelability, so
The pressure-sensitive adhesive layer can be formed on the surface of the base material layer of the laminate for producing the packaging bag and wound into a roll, which facilitates production of the laminate. Also, after opening the packaging bag, by exposing the adhesive layer and winding and pressing the opening,
Since the pressure-sensitive adhesive layer and the surface of the base material layer made of biaxially stretched polyethylene terephthalate adhere well to each other, it can be surely resealed.

A packaging bag comprising a laminated body having a base material layer and a heat-adhesive resin layer and formed by a gastric thermal adhesive portion and an edge thermal adhesive portion, the gastric thermal adhesive portion being in contact with the outer surface of the packaging bag. When folded like this, the edge of the palm-sealing heat-bonded portion that is on the upper side is extended outward by a predetermined dimension to form a palm-growing portion extension piece, and the surface facing the outer surface of the packaging bag With the configuration in which the adhesive layer is formed, the packaging bag is opened and the contents are taken out, and then the opening part is stuck in the state in which the adhesive layer extension piece is folded back to the opposite side to expose the adhesive layer. Since the adhesive layers adhere to each other by bending the adhesive layer inside, the opening can be easily resealed.

In the above packaging bag, a mouth pressure-sensitive adhesive layer is formed on the heat-adhesive resin layer surface of the laminated body at a position inside a certain dimension from one edge heat-bonded portion and in parallel with the edge heat-bonded portion. With such a configuration, after opening the edge heat-bonded portion and taking out the content, the palm part extension piece is folded back to the opposite side to expose the adhesive layer, and the mouth adhesive layer of the opening is removed. The opening can be reliably resealed by pressing the formed portion to bond the opening and bending the opening with the adhesive layer inside.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line I-I in FIG. 1, and FIG. 3 is a joint-part extending piece from a notch after opening the packaging bag of the first embodiment. FIG. 4 is a perspective view showing a state in which the adhesive layer is exposed by partially cutting the sheet, and FIG. 4 shows the packaging bag of the first embodiment, which is folded from the state shown in FIG. 3 so that the opening is inside. FIG. 5 is a perspective view showing a second embodiment of the present invention, FIG. 6 is a sectional view taken along line II-II in FIG. 5, and FIG. 7 is a view showing the packaging bag of the second embodiment after being opened. FIG. 8 is a perspective view showing a state where the heat-sealing adhesive portion is bent to the opposite side to expose the pressure-sensitive adhesive layer. FIG. 8 shows the packing bag of the second embodiment shown in FIG. FIG. 9 is a perspective view showing a state of being folded and resealed in a manner shown in FIG. 9, FIG. 9 is a perspective view showing a third embodiment of the present invention, and FIG. Where 2 is a heat-sealed adhesive portion, 3 and 4 are edge heat-sealed portions, 5 is a gusset folded portion, 6 is an extended piece of the palm portion, 7 is an adhesive layer, 7'is a mouth adhesive layer, 8 is a score line, 9a, 9b and 9c are notches, 10 is a laminated body, 11 is a winding and folding part, and 12 is a folding part.

The first embodiment of the present invention is as shown in FIGS. The shape is, as shown in FIG. 1, a laminated body 10 including a base material layer and a heat-adhesive resin layer, and a gas-sealed heat-bonded portion 2
A gusset pillow type bag formed by an upper edge heat-bonding portion 3 and a lower edge heat-bonding portion 4 and provided with a gusset folding portion 5 at a side edge thereof, wherein Has a palm part extending piece 6 formed by extending outward by a predetermined dimension, and an adhesive layer 7 is provided on the outer surface of the laminate 10 facing the palm part extending piece 6, A cut line 8 is formed along the outer edge of the heat-bonded portion 2 on the palm-arranging portion extending piece 6, and a plurality of notches 9a, 9b, 9c are formed at the outer end of the palm-arranging portion extending piece 6. is there. In the first embodiment, a large number of scars may be formed along the outer end of the palm extending portion extension piece 6. The score line 8 in the first embodiment penetrates the base material layer forming the laminated body or is formed at a depth within the range of the thickness of the base material layer.

The cross-sectional shape of the first embodiment of the present invention in the direction perpendicular to the gastrically-sealed heat-bonding portion 2 is as shown in FIG. 2, and the structure of the portion where the adhesive layer 7 is formed is in contact with the outer surface of the packaging bag. The upper edge of the gas-sealed heat-bonded portion 2 thus bent is extended outward by a certain dimension to form the gas-sealed portion extension piece 6, and a packaging bag facing the gas-held portion extension piece 6 is formed. Stack
The adhesive layer 7 is formed on the outer surface of 10 and the adhesive layer 7 is provided on the outer surface of the laminate 10 forming the packaging bag.
Is completely covered with the extending portion 6 of the palm part and is not exposed on the surface of the packaging bag. Therefore, when the packaging bag of the first embodiment is stored / transported, when the packaging bag is filled with the contents, and when the packed package is stored / transported / exhibited and sold, the adhesive layer 7 is It does not hinder work.

The method of resealing the opening after opening the edge heat-bonding portion 3 on the upper portion of the packaging bag of the first embodiment and taking out the contents is as shown in FIG. At the time when the split reaches the cut line 8 by tearing the gas palm portion extension piece 6 in the direction perpendicular to the gas palm heat-bonded portion 2, the tear piece extension piece 6 is torn along the cut line 8 toward the upper opening side. The adhesive layer 7 is exposed by partially cutting and removing.
With the pressure-sensitive adhesive layer 7 exposed on the opening side, the gusset folds on both sides of the opening of the packaging bag are folded inward to close the mouth, and the opening that closes the mouth has a constant width. The opening can be resealed as shown in FIG. 4 by winding and folding the exposed side of 7 and adhering the folded portion 11 to the outer surface of the packaging bag with the adhesive layer 7. When the content becomes less, the gas palm portion extending piece 6 is cut out from the notch 9b or the notch 9c formed on the lower side to expose the adhesive layer 7, and the opening is wound and folded. This allows the opening to be resealed depending on the amount of content remaining.

In the packaging bag according to the first embodiment of the present invention, the entire pressure-sensitive adhesive layer 7 formed on the outer surface of the laminated body 10 constituting the bag is covered with the chisel portion extending piece 6, and thus the packaging bag. The adhesive layer 7 does not adhere to other surfaces or the adhesive force of the adhesive layer 7 does not decrease during the handling. Then, when the contents remaining after the packaging bag is opened and the contents are taken out are stored, the joint-portion extending piece 6 covering the adhesive layer 7 is cut off to expose the adhesive layer 7. Because you can
The gusset folds 5 on both sides of the packaging bag are folded inward to fold the opening, and the adhesive layer 7 is rolled inward so that the folded portion 11 is exposed by the adhesive layer 7 Can be glued to the outer surface and resealed. When the content becomes less, the gas palm portion extending piece 6 is cut out from the notch 9b or the notch 9c formed on the lower side to expose the pressure-sensitive adhesive layer 7, and the opening is wound and folded. This allows the opening to be resealed depending on the amount of content remaining.

The second embodiment of the present invention is as shown in FIGS. As shown in FIG. 5, the shape is a laminated body 10 including a base material layer and a heat-adhesive resin layer, and a heat-sealed heat-bonding portion 2
A gusset pillow type bag formed by an upper edge heat-bonding portion 3 and a lower edge heat-bonding portion 4 and provided with a gusset folding portion 5 at a side end, wherein the gastric palm heat-bonding portion 2 is provided on the outer surface of the packaging bag. When folded so as to come into contact with, the end edge of the gas palm thermal bonding portion 2 which is the upper side is extended outward by a predetermined dimension to form a gas palm portion extension piece 6 and is adhered to the inner surface of the gas palm portion extension piece 6. This is a configuration in which the agent layer 7 is formed.

The cross-sectional shape of the second embodiment of the present invention in a direction perpendicular to the gassho-heat-bonding portion 2 is as shown in FIG. 6, and the gassho-heat-bonding portion 2 is bent so as to be in contact with the outer surface of the packaging bag.
The pressure-sensitive adhesive layer 7 is formed on the heat-adhesive resin layer surface of the inner surface of the palm-arranging portion extension piece 6 formed by outwardly extending the upper edge thereof by a certain dimension. In the second embodiment, the pressure-sensitive adhesive layer 7 is formed on the heat-bondable resin layer surface of the inner surface of the palm extending portion 6 and the pressure-sensitive adhesive layer 7 is not exposed. There is no problem in handling due to problems such as the adhesive layers 7 adhering to each other during transportation and filling of the packaging bag with contents.

After cutting off the edge heat-bonding portion 3 on the upper part of the packaging bag of the second embodiment and opening the package to take out the contents, the joint heat-bonding portion 2 is folded back to the opposite side to expose the adhesive layer 7. The made state is as shown in FIG. From this state, the gusset folds on both sides of the opening of the packaging bag are folded inward to close the opening, and the opening is bent so that the pressure-sensitive adhesive layer 7 is on the inside. The bent opening can be adhered with the adhesive layer 7 to reseal the opening.

The third embodiment of the present invention is as shown in FIGS. In the third embodiment, the mouth portion having a predetermined width is formed on the inner surface of the laminate 10 forming the packaging bag in parallel with the edge heat-bonding portion 3 at a position inside the edge heat-bonding portion 3 by a predetermined dimension, on the surface of the heat-adhesive resin layer. The structure is basically the same as that of the second embodiment except that the adhesive layer 7'is formed.

The cross-sectional shape of the portion where the pressure-sensitive adhesive layer 7'of the third embodiment of the present invention is formed in the direction perpendicular to the gastrically-sealed heat-bonded portion 2 is:
As shown in FIG. 10, the palm-arranging portion extending piece formed by outwardly extending the upper edge of the joint-sealing thermal adhesive portion 2 bent so as to contact the outer surface of the packaging bag by a predetermined dimension. The adhesive layer 7 is formed on the inner surface of 6, and the mouth adhesive layer 7'is formed on the inner surface of the laminate 10 on the front and back surfaces of the packaging bag. In the third embodiment,
The mouth adhesive layer 7 ′ is formed only on the inner surfaces of the laminate 10 on both the front and back sides of the packaging bag, but it extends over the entire circumference in the direction perpendicular to the gastric thermal bonding section 2 including the gusset folds 5 on both sides of the packaging bag. A mouth adhesive layer may be formed. In the third embodiment, since the opening of the packaging bag can be bonded by the mouth adhesive layer 7'and then the opening can be bent and resealed, the sealing property of the opening is excellent.

In the packaging bag of the present invention, the entire pressure-sensitive adhesive layer 7 is covered with the extending portion 6 of the chiral portion and is not exposed, so that the pressure-sensitive adhesive layer is used during transportation, storage and handling of the packaging bag. Does not adhere to or adhere to other surfaces. Then, when the contents remaining after the packaging bag is opened and the contents are taken out are stored, in the first embodiment, the gastric thermal adhesive portion 2 is cut off to expose the pressure-sensitive adhesive layer 7, and the second,
In the third embodiment, the packing bag can be easily resealed by folding back the opposite side of the gas-sealing heat-bonding portion 2 to expose the pressure-sensitive adhesive layer 7, and bending the opening with the pressure-sensitive adhesive layer 7 inside so that the packaging bag can be easily resealed. It is convenient. In the embodiment, the shape of the packaging bag is a gusset pillow type bag having the gusset folding section 5, but it may be a flat pillow type bag having no gusset folding section 5.

As the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer, one having high elasticity and low tack (tack-free) at room temperature and excellent adhesiveness can be preferably used. For example, Japanese Patent Application Laid-Open No. 2
As described in Japanese Patent Publication No. 001-115128,
It is possible to use a pressure-sensitive adhesive composition composed mainly of a polyester-based polymer having a carbonate structure and a weight-average molecular weight of 20,000 or more and a polyvinyl ether-based polymer. The above adhesive composition, by cross-linking by using a polyisocyanate compound having a group capable of reacting with a hydroxyl group or a carboxyl group contained in the polyester polymer, can exhibit more excellent adhesive properties. Is. The pressure-sensitive adhesive having this constitution adheres well to the polyethylene terephthalate surface and the like and can obtain good peelability from the polyethylene or polypropylene surface. Therefore, when the base material layer is polyethylene terephthalate and the heat-adhesive resin layer is polyethylene or polypropylene, good adhesiveness and releasability can be obtained, and therefore it can be suitably used as an adhesive for the packaging bag of the present invention. It is a thing. The coating amount of the pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer is preferably about 10 to 30 g / m ² .

The pressure-sensitive adhesive forming the pressure-sensitive adhesive layer of the packaging bags of the second and third embodiments has a weak adhesive force to the adherend, and the self-adhesiveness of the adhesive layers is excellent, especially the holding power. An adhesive can be used. For example, a base polymer composed of a block copolymer of a monovinyl-substituted aromatic compound and a conjugated diene compound and a chelate compound of a resin coordination composed of an alkaline earth metal as described in JP-B-7-113103 are disclosed. Self-adhesive adhesive as component, JP-A-10-287
At least a base polymer comprising a block copolymer of a monovinyl-substituted aromatic compound and a conjugated diene compound, a tackifier, and a polyfunctional isocyanate compound having two or more isocyanate groups, as described in Japanese Patent No. 858 A self-adhesive pressure sensitive adhesive as a component can be preferably used. The coating amount of the pressure-sensitive adhesive layer 7 or the mouth pressure-sensitive adhesive layer 7'is preferably 10 to 30 g / m ² .

The laminate constituting the packaging bag of the embodiment has a structure including a base material layer and a heat-adhesive resin layer. As the base material layer, biaxially stretched polyethylene terephthalate (PE
T) Biaxially oriented polypropylene (OPP), simple substance such as paper, or aluminum foil (AL) with them, aluminum vapor-deposited biaxially oriented polyethylene terephthalate (VM)
A layered product such as PET) can be used. As the heat-adhesive resin layer, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene-vinyl acetate copolymer (EVA), unstretched polypropylene (CP)
P), aluminum evaporated linear low density polyethylene (VM
LLDPE), aluminum vapor deposition unstretched polypropylene (VMCPP), etc. can be used. As a method for laminating the films, extrusion lamination (EC) using polyethylene or the like or dry lamination (DL) using a urethane adhesive can be used. Further, as a laminate constituting the packaging bag of the embodiment, an adhesive composition made of chlorinated polypropylene or the like is applied by gravure printing or the like only to a predetermined region of a base material layer such as biaxially oriented polypropylene (OPP). A configuration in which a heat-adhesive resin layer is formed can also be used.

The structure of the laminate is, for example, PET /
CPP, PET / LLDPE, PET / VMLLDP
E, PET / VMPET / LLDPE, PET / VMP
ET / CPP, PET / VMCPP, PET / AL / C
PP, PET / AL / LLDPE, OPP / CPP, O
PP / LLDPE, OPP / VMLLDPE, OPP /
VMCPP, OPP / part coat, paper / CPP, paper /
LLDPE, Paper / AL / CPP, Paper / AL / LLDPE
Etc. When the pressure-sensitive adhesive composition as described in JP 2001-115128 A is used, the base material layer is PET and the heat-adhesive resin layer is LLDP.
It is preferably E or CPP. When the pressure-sensitive adhesive layer is formed on the heat-adhesive resin layer surface as in the second and third embodiments, the inner surface of the heat-adhesive resin layer may be subjected to corona treatment or the like.

The method of manufacturing the packaging bag of the first embodiment is as follows:
A printed pattern is formed on one surface of a base layer made of biaxially stretched polyethylene terephthalate or the like, and a heat-adhesive resin layer made of polyethylene, polypropylene or the like is laminated on the pattern surface by extrusion lamination or dry lamination,
A continuous laminate made of biaxially stretched polyethylene terephthalate / polyethylene or biaxially stretched polyethylene terephthalate / polypropylene was produced, and a printed pattern was printed on the biaxially stretched polyethylene terephthalate surface of the produced laminate at a predetermined position in the flow direction of the laminate. The adhesive composition is applied in a strip shape having a predetermined width by gravure printing, etc. in a predetermined amount, dried and cross-linked, and then wound into a roll to form a laminate at a predetermined position in the flow direction. It is possible to produce a laminate in which a continuous pressure-sensitive adhesive layer having a predetermined width is formed. This laminated body is slit into a predetermined width, and subjected to a pillow type automatic filling and packaging machine to form a palm portion extending piece extending to one end of the palm thermal bonding portion, and the palm portion extending piece forms an adhesive layer. A pillow type bag can be produced so as to cover it.

The method of manufacturing the packaging bag of the second embodiment is as follows:
After a pattern is printed on one surface of a base material layer such as biaxially stretched polypropylene and a heat-adhesive resin layer made of polyethylene, polypropylene or the like is laminated on the surface to form a laminate, the polyethylene or polypropylene surface of the laminate is formed. To
A laminate for producing a packaging bag by forming a pressure-sensitive adhesive layer by applying a pressure-sensitive adhesive composition by gravure printing or the like to a belt having a predetermined width at a predetermined position in the flow direction of the laminate and aligning the printed pattern Can be made. It can also be produced by printing a pattern on one surface of a base layer made of biaxially oriented polypropylene and at the same time applying a part coat adhesive to a predetermined region in register with the pattern. The method for producing the pillow type bag is the same as in the first embodiment.

The method of manufacturing the packaging bag of the third embodiment is as follows:
Print a pattern on a laminate of paper / polypropylene, paper / polyethylene, paper / aluminum foil / polypropylene, paper / aluminum foil / polyethylene, etc., and at the same time parallel to the flow direction of the laminate at a predetermined position corresponding to the pattern on the polyethylene or polypropylene surface. A laminate for producing a packaging bag can be produced by forming a pressure-sensitive adhesive layer in a direction and a mouth-side pressure-sensitive adhesive layer in a direction perpendicular to the flow direction. In addition, a pattern is printed on one surface of biaxially oriented polypropylene, and at the same time, a part coat adhesive layer, a pressure-sensitive adhesive layer, and a mouth pressure-sensitive adhesive layer are formed at predetermined positions corresponding to the pattern on the other surface to produce a packaging bag. It is possible to produce a laminate for The first method to make pillow type bag
This is the same as the embodiment.

[0030]

In the packaging bag according to the first aspect of the present invention, after the packaging bag is opened and the contents are taken out, the chisel portion extending piece is cut off or the chisel thermal bonding portion is folded back to the opposite side. The adhesive layer is exposed by pressing, and the opening of the packaging bag is rolled and pressed, whereby the rolled portion is adhered to the outer surface of the packaging bag by the adhesive layer, and the opening can be easily resealed. Also, since the adhesive layer is not exposed on the surface of the packaging bag, the adhesive layers do not adhere to each other during storage, transportation and handling of the packaging bag, and the adhesive layer may adhere to other surfaces. It is easy to handle because it does not exist.

In the packaging bag according to the sixth aspect of the present invention, after the edge heat-bonded portion is cut off and opened to take out the contents, the chisel portion extending piece is folded back to the opposite side to form the adhesive layer. The opening can be easily resealed by bending and pressing the opening with the adhesive layer inside when exposed. Further, in the case of the structure in which the mouth adhesive layer is formed, after the edge heat-bonded portion is cut off and opened to take out the contents, the inside of the opening is pressed to open the opening by the mouth adhesive layer. The opening can be surely resealed by bonding and bending the opening with the adhesive layer inside.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line I-I in FIG.

FIG. 3 is a perspective view showing a state in which after opening the packaging bag of the first embodiment, the palm-arranging portion extension piece is partially cut out from the notch to expose the adhesive layer.

FIG. 4 is a perspective view of the packaging bag of the first embodiment in a state in which the opening is rolled and resealed from the state shown in FIG. 3 so that the adhesive layer is inside.

FIG. 5 is a perspective view showing a second embodiment of the present invention.

6 is a sectional view taken along line II-II in FIG.

FIG. 7 is a perspective view showing a state in which after opening the packaging bag of the second embodiment, the palm-sealing heat-bonding portion is bent to the opposite side to expose the pressure-sensitive adhesive layer.

FIG. 8 is a perspective view of the packaging bag of the second embodiment in a state in which the opening is folded and resealed from the state shown in FIG.

FIG. 9 is a perspective view showing a third embodiment of the present invention.

10 is a sectional view taken along line III-III in FIG.

[Explanation of symbols]

2 Gassho thermal bond 3,4 Edge thermal bond 5 gusset insert 6 Extended part 7 Adhesive layer 7'Mouth adhesive layer 8 score lines 9a, 9b, 9c Notches 10 stacks 11 Rolling and folding section 12 Folded part

Claims (7)

[Claims] 1. A packaging bag made of a laminate having a base material layer and a heat-adhesive resin layer, the bag comprising an open-ended heat-bonded portion and an edge-bonded heat-bonded portion. It is characterized in that one side is extended outward by a predetermined dimension to form a palm-arranging portion extension piece, and an adhesive layer is formed on the outer surface of the packaging bag facing the aforesaid palm-arranging portion extension piece. Packaging bag. 2. The extension piece of the palm-sealing portion is formed on an edge which is an upper side when bent so as to contact the outer surface of the packaging bag of the joint-sealing heat-bonding portion. Packaging bag. 3. A structure in which a cut line that is parallel to the gas-sealed heat-bonded portion is formed on the gas-sealed part that extends along the outer end of the gas-sealed heat-bonded portion. The packaging bag described in. 4. The packaging bag according to any one of claims 1 to 3, which has a configuration in which a notch or a large number of scratches are formed on an outer end of the palm-arranged portion extension piece. 5. The heat-adhesive resin, wherein the pressure-sensitive adhesive layer is made of a pressure-sensitive adhesive composition containing a polyester polymer having a carbonate structure as a main component, and the base material layer of the laminate is made of biaxially oriented polyethylene terephthalate. The packaging bag according to any one of claims 1 to 4, wherein the layer is made of polyethylene or polypropylene. 6. A packaging bag comprising a laminated body having a base material layer and a heat-adhesive resin layer, and formed by a joint thermal bonding portion and an edge thermal bonding portion, wherein the packaging thermal bonding portion is the packaging bag. When folded so as to contact the outer surface of, the outer edge of the gas-sealed heat-bonded portion that is on the upper side is extended outward by a predetermined dimension to form a gas-sealed portion extension piece, and A packaging bag comprising a structure in which an adhesive layer is formed on a surface facing the outer surface. 7. A structure in which a mouth adhesive layer is formed on a surface of a heat-adhesive resin layer of the laminate in parallel with the edge heat-bonding portion at a position inside a certain edge heat-bonding portion in parallel with the edge heat-bonding portion. The packaging bag according to claim 6, which is characterized in that.