JP2012046214A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag with reclosing performance in which an opening can be formed by opening by hands after contents are filled and sealed, the contents as needed can be taken out from the opening, and then the opening can be simply resealed.SOLUTION: The packaging bag has fringe heat-adhesion portions which are formed so that surfaces of heat-adherent resin layers of a laminated body 10 in which base materials 11 and the heat-adherent resin layers are laminated via hot melt adhesive layers face each other and fringes thereof are heat-adhered. A half-cut 4 of an open shape is formed from the base materials 11 sides, and an inner half-cut 5 of an open shape which is smaller than the half-cut 4 is provided along the half-cut 4 from the heat-adherent resin layers sides. Outer fringes of the fringe heat-adhesion portions and positions on which the half-cut 4 and the half-cut 5 are provided are in an unformed portion in which the hot melt adhesive layers are removed.

Description

  The present invention relates to a packaging bag using a laminate in which a base material layer and a heat-adhesive resin layer are laminated via a hot-melt pressure-sensitive adhesive layer, and more specifically, an outer half cut and a heat-adhesive resin layer from the base material layer side. By making the inner half-cut from the side, the contents such as food and non-food can be filled and sealed in the packaging bag, then opened from the outer half-cut and the inner half-cut, and repeatedly resealed ( Hereinafter, the packaging bag is provided with recloseability) and can be repeatedly opened and closed to take out the contents.

  After the contents of food and non-food are sealed and wrapped in a packaging bag made of a laminate of plastic film, paper, etc., when used, the contents are opened once and the necessary contents are taken out, then the remaining contents are stored. In this case, for example, as a sealed bag for storing a wet napkin or the like, a closed-loop cut is made at a location that serves as a take-out port for one sheet material having airtightness, and the pressure-sensitive adhesive layer is made of an airtight film. 2. Description of the Related Art A cosmetic encapsulating bag is known in which a pressure-sensitive adhesive layer and a sheet material are attached so that an open / close lid having a contact is in contact (see, for example, Patent Document 1). In this cosmetic bag, the take-out port can be resealed by the pressure-sensitive adhesive layer constituting the opening / closing lid.

  In addition, it is made of a laminated material of the front and back, has an upper seal part and side seal parts on both sides, has an unsealed part at one corner of the upper seal part, and is close to the upper seal part In a resealable packaging bag having a notch and a perforation line, the unsealed part is a laminate of two sheets, front and back, and a polyolefin-based adhesive layer on one side of the base film layer. A three-layer coextrusion film layer formed by laminating resin layers is laminated, and a resealable laminated tape composed of a laminate in which a sealant layer is laminated on the other surface is sandwiched from both sides, A re-sealable packaging bag is proposed in which the top seal part and the side seal part on both sides are sandwiched between two sides of the front and back laminate materials in a sandwich form and sealed. (For example, see Patent Document 2)And it is set as the structure which can be resealed by exposing the adhesive resin layer surface of a resealable laminated tape at the time of opening of a resealable packaging bag.

  However, the cosmetic-encapsulated bag described in Patent Document 1 requires an air-tight film as a separate member, and increases the cost of increasing the number of steps for attaching the air-tight film to a sheet material. However, there is a problem that it takes time and effort to manage and arrange the airtight film according to the production of the sheet material. On the other hand, the resealable packaging bag described in Patent Document 2 has the same problems as Patent Document 1 because a resealable laminated tape is separately required as a member, and also has an upper seal portion and side seal portions on both sides. Is sealed by sandwiching a resealable laminate tape from both sides with a laminate material on the front and back, so that the adhesive resin layer of the resealable laminate tape is resealed by the heat and pressure at the time of sealing. The problem is that it sticks out to the outer ends of the upper seal part and side seal part of the adhesive packaging bag and the dust adheres to it, which is undesirable from the viewpoint of hygiene, or the adhesive resin layer on the inner end of the upper seal part and side seal part. However, there is a problem that the contents stick to the sticky resin layer that sticks out, and there is a problem that when the contents are taken out, the hand comes into contact with the sticky resin layer and it is difficult to take out the contents.

Japanese Patent Publication No. 2-30948 JP 2006-199343 A

  Therefore, the present invention has been made to solve the above problems, and the object of the present invention is to form the opening by manually opening the contents after filling and sealing the contents. It is an object of the present invention to provide a packaging bag having recloseability that can be taken out as much as necessary and can easily re-seal an opening.

  This invention solves the said subject, and this invention of Claim 1 is said thermal adhesiveness of the laminated body by which the base material layer and the thermoadhesive resin layer were laminated | stacked through the hot-melt adhesive layer. A packaging bag provided with a peripheral heat-bonded portion by facing the edges of the resin layers facing each other and thermally bonded to the periphery, wherein the heat-adhesive resin is subjected to an outer half cut in a shape opened from the base material layer side. An inner half cut having an open shape smaller than the outer half cut is applied along the outer half cut from the layer side, and the outer peripheral edge of the peripheral thermal bonding portion, and the outer half cut and the inner half cut are applied. The packaging bag is characterized in that the position is a non-formed part from which the hot melt pressure-sensitive adhesive layer is removed.

  Moreover, the present invention according to claim 2 is the packaging bag according to claim 1, wherein the outer half cut is provided with a protrusion that protrudes on the opposite side of the inner half cut, and at least the protrusion is the hot melt. The adhesive layer is a non-formed part from which the adhesive layer is removed.

  Further, the present invention according to claim 3 is the packaging bag according to claim 1 or 2, wherein the base is in a region surrounded by a line connecting both ends of the outer half cut having an open shape and the outer half cut. A fold line is formed from the material layer side.

The packaging bag of the present invention is such that the periphery of the heat-adhesive resin layer of the laminate in which the base material layer and the heat-adhesive resin layer are laminated via the hot-melt pressure-sensitive adhesive layer is oppositely bonded to the periphery. A packaging bag provided with a peripheral heat-bonding portion, which is subjected to an outer half cut in a shape opened from the base material layer side, and is smaller than the outer half cut along the outer half cut from the thermal adhesive resin layer side By opening the inner half cut with the open shape, the opening is opened in the area surrounded by the inner half cut and the line connecting the ends of the open inner half cut. It can be formed easily and the contents can be taken out from the opening. Further, the portion between the outer half-cut and the inner half-cut is used as an adhesive allowance, and the portion of the hot melt pressure-sensitive adhesive layer exposed to the opening piece at the time of opening is pressure-bonded to the adhesive allowance, so that recloseability can be obtained. Furthermore, since it is not necessary to prepare a separate member as in the case of a conventional resealable packaging bag, there is no need to increase the cost of inventory management and arrangement of the member, and the process of sticking is not increased. it can.
Further, the outer peripheral edge of the peripheral thermal bonding portion and the position where the outer half cut and the inner half cut are made are non-formed portions from which the hot melt pressure-sensitive adhesive layer is removed, A hot melt pressure-sensitive adhesive layer does not stick out to the outer edge of the heat-bonding part, so that there is no dust adhering and hygienic, and a blade that cuts the outer peripheral edge of the packaging bag at the time of manufacturing the packaging bag, and an outer half Since there is no hot melt pressure-sensitive adhesive layer at the position where the blade for cutting and inner half-cut comes into contact with the laminated body, hot melt pressure-sensitive adhesive does not accumulate on the blade, so that bag-making processability is improved.

  Further, in the present invention according to claim 2, the outer half cut is provided with a protruding portion that protrudes on the opposite side to the inner half cut, and at least the protruding portion is a non-formed portion from which the hot melt adhesive layer is removed. With the configuration described above, the protruding portion can be easily opened as a knob.

  Further, in the present invention according to claim 3, by forming a folding line from the base material layer side in a region surrounded by the line connecting the both ends of the outer half cut of the open shape and the outer half cut, When opened, the laminated body in the region surrounded by the outer half cut can be folded back by the folding line, and the opened state can be maintained, and the contents can be easily taken out.

It is a top view which shows one Embodiment of the packaging bag which concerns on this invention. It is the XX sectional view taken on the line of FIG. It is the YY sectional view taken on the line of FIG. It is sectional drawing which shows the opening state of the packaging bag which concerns on this invention. It is a top view which shows other embodiment of the packaging bag which concerns on this invention.

The above-described present invention will be described in detail below with reference to the drawings.
1 is a plan view showing an embodiment of a packaging bag according to the present invention, FIG. 2 is a sectional view taken along line XX of FIG. 1, FIG. 3 is a sectional view taken along line YY of FIG. FIG. 5 is a plan view showing another embodiment of the packaging bag according to the present invention, in which 1 and 1 ′ are packaging bags, and 2a and 2b are edge seals. , 3 is a back seal part, 4 is an outer half cut, 4a and 4b are cut, 5 is an inner half cut, 6 is a protruding part, 7 is a folding line, 8 is an opening, 9 is an opening piece, and 10 is a laminate. , 11 is a base material layer, 12 is a hot-melt pressure-sensitive adhesive layer, 13 is a heat-adhesive resin layer, 14 is a release layer, 15 is an adhesive layer, d1 is an interval between the outer half-cut and the inner half-cut, d2 is a belt-like shape The width of the hot melt pressure-sensitive adhesive layer, S, indicates a line connecting both ends of the outer half cut and a region surrounded by the outer half cut.

  1 is a plan view showing an embodiment of a packaging bag according to the present invention, FIG. 2 is a sectional view taken along line XX of FIG. 1, and FIG. 3 is a sectional view taken along line YY of FIG. In the back seal portion 3, the surfaces of the heat-adhesive resin layer 13 of the rectangular laminate 10 in which the base material layer 11 and the heat-adhesive resin layer 13 are laminated via the hot-melt pressure-sensitive adhesive layer face each other. This is a pillow type packaging bag that is heat-bonded, has a cylindrical shape, and has an open end that is heat-bonded by the edge seal portions 2a and 2b. One of the edge seal portions 2a, 2b is thermally bonded first, and the other is thermally bonded after filling the packaging bag with the contents. Further, the edge seal portions 2a and 2b and the back seal portion 3 correspond to the peripheral heat bonding portion of the present application.

On the front surface of the packaging bag 1 of the present invention (opposite side of the back seal portion 3), an outer half cut 4 having a shape opened from the base material layer 11 side is applied in a substantially fishbowl vertical cross-sectional shape, and a heat-adhesive resin layer 13 is formed. An inner half cut 5 having an open shape smaller than the outer half cut 4 is provided along the outer half cut 4 from the side. Further, a fold line 7 is formed from the base material layer 11 side in a region S surrounded by a line connecting both ends of the open outer half cut 4 and the outer half cut 4. The fold line 7 can be formed by a ruled line or a half cut, but when the one formed by the huff cut is opened, the unsealed piece 9 (see FIG. 4) made of the laminated body 10 in the region surrounded by the outer half cut 4 is folded. It is preferable because the opened state can be maintained by folding back at the line 7 and the contents can be easily taken out.
Further, a protrusion 6 is provided at the center of the outer half-cut 4 so as to protrude on the opposite side of the inner half-cut 5, and this protrusion 6 serves as a knob for opening as will be described later. The hot melt pressure-sensitive adhesive layer is removed in order to improve the property. Further, at both ends of the outer half cut 4, a role of a stopper for preventing the opening piece 9 (see FIG. 4) from being torn off and separated from the packaging bag 1 when the protruding portion 6 is opened as a knob. Incisions 4a and 4b that satisfy the following conditions are provided.

  Further, the main part of the present invention will be described in detail with reference to FIGS. 2 and 3 are enlarged views of the main part. The laminated body 10 which comprises the packaging bag 1 of this invention is laminated | stacked via the contact bonding layer 15 which melted and extruded the base material layer 11 and the thermoadhesive resin layer 13 with the extrusion method. Further, a string-like release layer 14 is formed on the adhesive layer 15 side of the base material layer 11 where the outer half cut 4 and the inner half cut 5 are located, and between the release layers 14 and 14 (the outer half cut 4 and the inner half cut). The hot-melt pressure-sensitive adhesive layer 12 is formed in a band shape on the adhesive layer 15 side of the base material layer 11 in a region sandwiched between 5. The distance between the outer half cut 4 and the inner half cut 5 is preferably 5 to 20 mm. If it is less than 5 mm, the width of the band-like hot melt pressure-sensitive adhesive layer 12 becomes too narrow and the adhesive strength becomes weak, so that sufficient recloseability cannot be obtained. If it exceeds 20 mm, a large opening cannot be obtained, and it becomes difficult to take out the contents. Further, the width of the belt-shaped hot melt pressure-sensitive adhesive layer 12 formed between the outer half cut 4 and the inner half cut 5 is preferably 2 to 15 mm, and if it is less than 2 mm, the width of the hot melt pressure-sensitive adhesive layer 12 becomes too narrow and adheres. Since the strength becomes weak, sufficient recloseability cannot be obtained, and when it exceeds 15 mm, the adhesive strength becomes strong and it becomes difficult to open. The distance between the outer half-cut 4 and the inner half-cut 5 can be arbitrarily designed according to the type and size of the contents, and the required opening strength is a strip-shaped hot melt formed between the outer half-cut 4 and the inner half-cut 5 It can be controlled by changing the width of the pressure-sensitive adhesive layer 12.

  Further, as shown in FIGS. 2 and 3, the outer peripheral edges of the edge seal portions 2 a and 2 b and the back seal portion 3, which are peripheral heat-bonding portions, are non-formed portions from which the hot melt pressure-sensitive adhesive layer 12 is removed. Yes. In the packaging bag 1 of the present invention, as described above, the outer peripheral edge of the peripheral thermal bonding portion and the position where the outer half cut 4 and the inner half cut 5 are applied are not formed in which the hot melt pressure-sensitive adhesive layer 12 is removed. It is characterized by being part. Therefore, in one embodiment, an example in which the hot melt pressure-sensitive adhesive layer 12 is formed only in a region sandwiched between the outer half cut 4 and the inner half cut 5 is shown, but the present invention is not limited to this, and the gist of the present invention. It can also be formed in other parts without departing from the above.

  The packaging bag of the present invention can be used for various types of bags such as a gusset, a pillow gusset, a three-side seal, and a four-side seal in addition to the form of the pillow type bag shown in the embodiment. Further, for the lamination of the base material layer 11 and the heat-adhesive resin layer 13 of the laminate 10, a known extrusion method, dry lamination method, non-solvent adhesive lamination method, or the like can be applied.

  Next, the opening method of the packaging bag 1 of this invention is demonstrated, referring FIG.4 and FIG.2, FIG.3. As shown in FIG. 4, after the contents are filled from one of the open ends of the unsealed edge seal portions 2a and 2b, the contents are sealed by heat bonding. Thereafter, when the opening is opened, since the peeling layer 14 is formed on the protruding portion 6, the protruding portion 6 is easily peeled between the peeling layer 14 and the adhesive layer 15, and the peeled protruding portion 6 is used as a knob. When picked with a finger and pulled upward, the laminate 10 peels between the hot-melt pressure-sensitive adhesive layer 12 and the adhesive layer 15 along the outer half-cut 4 and the inner half-cut 5, and the inner half-cut 5 and the folding line 7. Since the adhesive layer 15 and the heat-adhesive resin layer 13 in the region surrounded by are not peeled off, they are pulled upward while being united to form an opening piece 9, and when folded back at the folding line 7, the opening piece 9 is Since this state is maintained, a large opening 8 surrounded by the inner half cut 5 and the folding line 7 is formed on the front surface of the packaging bag 1, and the contents can be easily taken out from the opening 8. In FIG. 4, illustration of the peeling layer 14 is omitted except for the protruding portion 6, but a peeling layer is formed on the periphery of the outer half cut 4 and the inner half cut 5 of the opening piece 9.

  In the packaging bag of the present invention, the positions and shapes for forming the outer half-cut 4 and the inner half-cut 5 are not limited to those in the embodiment, and the back surface other than the front surface (opposite side of the back seal portion) of the packaging bag 1. It can also be provided (on the back seal side), and the shape and size of the opening can be freely set depending on the contents. FIG. 5 is a plan view showing another embodiment of the present invention. As shown in FIG. 5, the packaging bag 1 ′, which is another embodiment of the present invention, is provided with an outer half cut 4 and an inner half cut 5 in a small shape at the lower part on the edge seal portion 2 a side on the front surface of the packaging bag. Is. Others are the same as one embodiment. When the contents of the packaging bag 1 'are granular, such as a chocolate chip, for example, the opening portion formed by opening the protruding portion 6 of the outer half cut 4 as a knob portion is used as a swing outlet, and a necessary amount is shaken out. Since it can be taken out, it becomes convenient.

  Next, the laminated body 10 which comprises the packaging bag 1 which concerns on this invention is demonstrated. First, the material used for the heat-adhesive resin layer 13 of the laminate 10 may be any heat-adhesive resin that can be melted by heat and welded to each other, and can be appropriately selected and used depending on required physical properties. For example, 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 copolymer , An ionomer resin, an ethylene-acrylic acid copolymer, an ethylene-methyl acrylate copolymer, an ethylene-methacrylic acid copolymer, and the like.

  Next, as a base material used for the base material layer 11 of the laminate 10, a synthetic resin film having excellent properties in mechanical, physical, chemical and the like can be used. , Uniaxially or biaxially stretched films using resins such as polypropylene and polypropylene, etc., and inorganic resins such as aluminum oxide and silicon oxide are deposited on these stretched films or resins having barrier properties such as polyvinyl alcohol A coated film can be used. The thickness of the film may be a thickness that can be held to the minimum necessary with respect to strength, rigidity, etc. as a base material, and may be determined in consideration of cost and the like. Needless to say, there is a stretched film having printability because printing is usually performed on the heat-adhesive resin layer 13 side of the base material layer 11.

  Further, the laminate 10 is required for the contents between the heat-adhesive resin layer 13 and the base material layer 11 in order to impart gas barrier properties such as oxygen gas and water vapor gas and / or light shielding properties. An intermediate layer can be provided by a protective function. As a material constituting this intermediate layer, for example, a metal foil such as aluminum, iron, copper, or tin, a film such as polyvinyl alcohol, saponified ethylene-vinyl acetate copolymer, polyvinylidene chloride, or polyester, Polyamide, polyethylene, polypropylene, polyolefins such as ethylene-propylene copolymer, films made of polyvinyl alcohol, etc. or inorganic substances such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, zirconium oxide The film etc. which gave vapor deposition of can be used. In addition, when laminating | stacking an intermediate | middle layer, it is more preferable to provide a hot-melt adhesive layer between a base material layer and an intermediate | middle layer. Moreover, it is important to provide the inner half cut 5 so as to penetrate the heat-adhesive resin layer and the intermediate layer.

As the hot-melt pressure-sensitive adhesive used for the hot-melt pressure-sensitive adhesive layer, a hot-melt composition containing a tackifier in a base polymer made of a thermoplastic resin is used. The base polymer component of this composition includes, for example, a styrene-isoprene block copolymer, a styrene-butadiene block copolymer, an acrylic resin, an ethylene-vinyl acetate copolymer, a block copolymer of vinyl aromatic and conjugated diene. A polymer, a hydrogenated product thereof, an ethylene-α-olefin copolymer, a polyester resin, or the like is used alone or in combination.
Examples of tackifiers include coumarone / indene resin, phenol resin, phenol / formaldehyde resin, terpene / phenol resin, polyterpene resin, xylene / formaldehyde resin, synthetic polyterpene resin, aromatic hydrocarbon resin, aliphatic cyclic hydrocarbon resin, hydrogen Additive hydrocarbon resin, hydrocarbon resin, polybutene, rosin, rosin ester, hydrogenated rosin, ester of hydrogenated rosin and monoalcohol or polyhydric alcohol, aliphatic petroleum resin, aromatic petroleum resin, and copolymerization Based petroleum resins.
In addition, a plasticizer, a viscosity modifier, an antioxidant, a filler and the like are appropriately added to the hot melt adhesive. Usually, the thickness of the hot melt pressure-sensitive adhesive layer is 5 to 30 μm.

  Examples of the release agent used for the release layer 14 include nitrified cotton-based, polyamide-based, polyester-based, acrylic-based, urethane-based, and alkyd-based resins. These may be used alone or in combination to form a gravure as a solution. The release agent layer 14 can be formed by part coating by a processing method such as printing or flexographic printing. Easy release property can be adjusted by mixing the release agent with wax or silicon as an additive.

  Next, the example of a manufacturing method of the packaging bag 1 of this invention is demonstrated. First, a printed layer for design and display and a release layer are formed on one surface of the rolled-up base material layer 11 by a printing method such as gravure printing or flexographic printing, and an overprint (OP) layer is formed on the other surface. Form. Next, a hot melt pressure-sensitive adhesive layer is formed by pattern coating using, for example, a gravure plate in registration with the printed layer and the release layer on the surface on which the print layer and the release layer are formed. Then, the surface of the hot-melt pressure-sensitive adhesive layer formed on the base material layer and the heat-adhesive resin layer are laminated by an extrusion method or a dry lamination method. Thereafter, for example, the outer half cut is performed from the base material layer surface of the laminate and the inner half cut is performed from the heat-adhesive resin layer surface by a punching machine equipped with a die roll having a half-cut blade having a predetermined size and shape. Thereafter, the bag is made into a predetermined form of packaging bag by a bag making machine. Note that the OP layer may be omitted when the hot melt pressure-sensitive adhesive layer forming step is performed in-line with the intermediate layer or the heat-bonding resin layer laminating step, but when it is performed off-line, the hot melt pressure-sensitive adhesive layer may be omitted. Since the surface opposite to the surface on which the agent layer surface and the printed layer of the base material layer and the release layer are formed are brought into contact with each other at the time of winding, it is necessary to form an OP layer. The OP layer is formed using a release agent used for the release layer as an OP varnish.

  Next, the present invention will be described in more detail with reference to the following examples.

  Using a transparent biaxially stretched polyester film (PET) with a thickness of 25 μm for the base material layer, a printed layer with urethane-based ink on one side of PET, a string-like release layer with polyamide-based ink, and a polyethyleneimine-based anchor agent Then, an anchor coat (AC) layer was formed on the entire surface, and an OP layer was formed on the entire surface with a polyamide-based ink added with silicone on the other surface. After that, align with the print layer and release layer with a hot melt coater, and part-coat hot melt adhesive (HM) with acrylic resin as the base polymer and terpene resin as the tackifier at a predetermined position. A melt adhesive layer was laminated to produce an intermediate laminate. After that, using unstretched polypropylene (CPP) with a thickness of 30 μm for the heat-adhesive resin layer, sandwich lamination is performed while melting and extruding the low density polyethylene (PE) with a thickness of 15 μm to the HM layer surface of the intermediate laminate and CPP. A laminate having a configuration of <OP layer / PET 25 μm / printing layer, release layer, AC layer / HM layer / PE 15 μm / CPP 30 μm> was produced. After that, the outer half-cut is applied to the PET surface by a punching machine equipped with a die-cut having a predetermined shape outer half-cut blade on the laminate, and a die having a specified shape inner half-cut blade. From the CPP surface to CPP, PE An inner half cut penetrating through was formed. Thus, a pillow-type packaging bag 1 shown in an embodiment was produced. The interval between the outer half cut and the inner half cut was 8 mm, and the width of the belt-like HM layer was 5 mm.

  The packaging bag was the same as Example 1 except that the interval between the outer half cut and the inner half cut was 20 mm, and the width of the belt-like HM layer was 10 mm.

  The packaging bag was the same as Example 1 except that the interval between the outer half cut and the inner half cut was 8 mm, and the width of the belt-like HM layer was 2 mm.

  The packaging bag was the same as Example 1 except that the interval between the outer half cut and the inner half cut was 20 mm, and the width of the belt-like HM layer was 15 mm.

  About the packaging bag produced in Examples 1-4 produced above, openability and recloseability were evaluated and the result was shown in Table 1. The openability and recloseability were sensory evaluated by five panelists. The evaluation criteria are also shown in Table 1.

  As shown in Table 1, the packaging bags of Examples 1 to 4 were good in both openability and recloseability.

DESCRIPTION OF SYMBOLS 1, 1 'Packaging bag 2a, 2b Edge seal part 3 Back seal part 4 Outer half cut 4a, 4b Cut 5 Inner half cut 6 Protruding part 7 Folding line 8 Opening part 9 Opening piece 10 Laminate body 11 Base material layer 12 Hot Melt pressure-sensitive adhesive layer 13 Thermal adhesive resin layer 14 Release layer 15 Adhesive layer d1 Interval between outer half-cut and inner half-cut d2 Width of band-shaped hot melt pressure-sensitive adhesive layer,
S Area surrounded by a line connecting both ends of the outer half cut and the outer half cut

Claims (3)

The peripheral heat bonding part was provided by thermally bonding the peripheral edges of the laminated body in which the base material layer and the thermal adhesive resin layer were laminated with the hot melt pressure-sensitive adhesive layer facing each other. An outer half cut in a shape that is opened from the base material layer side and is smaller than the outer half cut along the outer half cut from the thermal adhesive resin layer side. The outer peripheral edge of the peripheral thermal bonding portion and the position where the outer half cut and the inner half cut are applied are the non-formed portions from which the hot melt pressure-sensitive adhesive layer is removed. A packaging bag characterized by that. The outer half cut is provided with a protruding portion that protrudes on the opposite side of the inner half cut, and at least the protruding portion is a non-formed portion from which the hot melt adhesive layer is removed. The packaging bag according to 1. The package according to claim 1 or 2, wherein a folding line is formed from the base material layer side in a region surrounded by a line connecting both ends of the outer half cut having an open shape and the outer half cut. bag.

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