JP5234245B2 - Packaging bag - Google Patents

Description

The present invention relates to a packaging bag that contains a fragrance and other contents therein.

For example, substances that the active ingredient evaporates and diffuses to the outside, such as fragrances, and substances that adsorb odorous components in the outside air, such as deodorants, are used in a form in which they are housed inside the packaging container. It is common.

Since such a packaging container is used by being deferred at a certain indoor position for a long period of time, it is often composed of a molded container having high form stability and high barrier properties (for example, Patent Document 1). . In a packaging container made of a molded container, a hole communicating with the inside is provided in the wall surface, and air inside and outside of the packaging container can enter and exit through this hole.

For example, in the case of a horizontal packaging container, the hole for ventilation is generally openable on the upper surface, and is opened in the following procedure. That is, the container upper surface is removed by attaching a peelable film to the upper surface of the molded container and shipping the container in a sealed state, and removing a predetermined portion of the container upper surface by the adhesive strength of the film when peeling the film during use. Open a hole for ventilation. In this container, in order to ensure ventilation, a hole is often formed only at the center of the upper surface of the container without providing a hole near the peripheral edge of the upper surface where the opening of the film is started.
JP 2007-216990 A

However, since the molded container needs to have a thick wall surface in order to realize durability for long-term use, the weight tends to increase. Further, when the outer shape is increased in order to enhance the stability, the place of use is restricted, and a large amount of packaging material and a storage place are required for shipment from the factory. Furthermore, there is a problem that the cost of the material used for molding increases due to the thickening of the wall surface and the enlargement of the outer shape. In addition, since the molded container is formed of a hard material, it becomes bulky, and disposal after use is inconvenient.

Moreover, in the conventional packaging container of the structure which forms the hole part for ventilation | gas_flowing by peeling a film at the time of use, since a hole part is provided only in the center, it is between the inside of a shaping | molding container, and the exterior. Ventilation is limited. For this reason, it is thought that the effect by the substance accommodated in the inside is not fully exhibited. On the other hand, if the opening area of the hole is increased in order to realize sufficient ventilation only by the central hole, the contents may come out due to vibration.

Accordingly, an object of the present invention is to provide a packaging bag that can suppress an increase in weight and outer shape, thereby improving the degree of freedom of use place, and reducing manufacturing and transport costs. And Moreover, the objective of this invention is providing the packaging bag which can improve discardability by enabling size reduction after use. Furthermore, an object of the present invention is to provide a packaging bag capable of ensuring sufficient ventilation between the inside and the outside of the packaging bag while preventing the contents in the packaging bag from going outside.

In order to solve the above problems, the packaging bag of the present invention has a self-supporting shape having at least two opposing surfaces, and a release layer is formed on at least a part of the outer surface of at least one of the opposing surfaces. A packaging bag having an inner layer material laminated with an outer layer material interposed therebetween, and by peeling the outer layer material, a plurality of holes communicating with the inside of the packaging bag are formed in the inner layer material. the hole portion, distributed in the opening area there is, the opening area of the plurality of holes, rather than the central portion of the inner layer material, smaller towards the peeling start position side of the outer layer material, and the central portion of the inner layer member Is larger than the side and the lower side .

In the packaging bag of the present invention, the opening areas of the plurality of holes can be made smaller than the outer diameter of the contents accommodated in the packaging bag before the outer layer material is peeled for the first time.

In the packaging bag of the present invention, it is preferable that there is a distribution in the peel strength between the inner layer material and the outer layer material via the release layer.

In the packaging bag of the present invention, the plurality of holes are preferably formed in a certain range on the peeling start position side.

In the packaging bag of the present invention, the outer layer material may be laminated so as to cover the entire outer surface of the inner layer material.

In the packaging bag of the present invention, it is preferable that the outer layer material is laminated in a region of the inner layer material where the hole is formed.

The packaging bag of this invention WHEREIN: It can also be set as the structure by which the peeling layer is not laminated | stacked between the outer layer material and the inner layer material in the peeling start position.

In the packaging bag of the present invention, a groove is formed in the outer layer material at the peeling start position. When the outer layer material is peeled from the inner layer material, the outer layer material may be peeled off from the peeling start position by the groove.

In the packaging bag of the present invention, the outer layer material may protrude outward from the inner layer material at the peeling start position.

In the packaging bag of the present invention, the packaging bag may have a plurality of holes formed on each of the opposing surfaces.

In the packaging bag of the present invention, it is desirable that a groove shape corresponding to the outer shape of the hole opened by peeling the outer layer material is formed on the inner layer material by die processing.

In the packaging bag of the present invention, the groove formed in the outer layer material can be formed by laser groove processing.

According to the present invention, the structure in which the inner layer materials of a relatively thin laminate are formed by heat bonding to each other can reduce the weight and the outer shape as compared with the packaging container by molding, thereby improving the degree of freedom of use place. Can be made. In addition, the manufacturing and transport costs can be reduced, and the size can be reduced after use, so that the discardability can be improved.

In addition, since there is a distribution in the opening area of the plurality of holes, that is, because the opening area of all of the plurality of holes is not the same, it is possible to reliably form the hole even at the end of the inner layer material, A large hole can be formed in the center portion, and these can improve air permeability and prevent spilling of the contents at the same time.

Hereinafter, the packaging bag 10 which concerns on embodiment of this invention is demonstrated in detail, referring drawings.
FIG. 1 is a plan view showing a state in which the packaging bag 10 is folded. FIG. 2 is a perspective view showing the configuration of the packaging bag 10. In addition, in FIG. 1, 2, the display of a hole is abbreviate | omitted.

This embodiment shows an embodiment when the packaging bag of the present invention is applied to a self-supporting packaging bag (standing pouch), but the present invention is not limited to this embodiment, for example, a horizontal type, It can also be applied to pouches having gussets on both sides.
Below, the detailed structure of the packaging bag 10 is demonstrated.

The packaging bag 10 includes a body film 20 and a bottom film 12 of two front and back surfaces. In the following embodiment, the laminated body constituting the present invention is applied to the body film 20. The film constituting each surface of the packaging bag 10 and the packaging bag 10 can both be manufactured by a known method. The laminate is formed by laminating the outer layer material 30, the release layer 40, and the inner layer material 50 in this order, and is used as an original fabric of the body film 20. The bottom film 12 folded into an inverted V-shaped cross section is inserted into the lower part 20a of the two substantially rectangular trunk films 20 arranged opposite to each other by the standing pouch bag making machine, and the lower part 20a and the bottom film of the trunk film 20 are inserted. The lower part is sealed by thermally bonding (thermal fusion) 12. Moreover, the shape which provided the space inside is formed by heat-bonding both the side parts 20b and 20c of the two trunk | drum films 20 mutually.

In the internal space of the packaging bag 10, for example, a fragrance, a deodorant, a deodorant, a hygroscopic agent, an insect repellent, and a bath agent are accommodated as contents. After filling the contents, the upper part 20d is thermally bonded, and the packaging bag 10 is completed.

Next, the layer configuration of the packaging bag 10 will be described in detail with reference to FIGS. 3 and 4. As shown in FIG. 3, the inner layer material 50, the release layer 40, and the outer layer material 30 are laminated in this order from the inside of the body film 20 of the packaging bag 10. Here, FIG. 3 is a partial cross-sectional view in the thickness direction showing the layer structure of the body film 20 in the packaging bag 10 according to the present embodiment. FIG. 4 is a partial cross-sectional view corresponding to FIG. 3 showing a state when the outer layer material 30 is peeled off.

The inner layer material 50 is composed of, for example, two layers, the inner layer 51 is made of a thermoplastic resin that can be thermally bonded, and a polyolefin resin that is a normal heat sealing resin is mainly used.

More specifically, low-, medium-, and high-density polyethylene, linear low density polyethylene, isotactic polypropylene, propylene / ethylene copolymer, polybutene-1, ethylene / propylene copolymer, ethylene · Butene-1 copolymer, propylene / butene-1 copolymer, ethylene / vinyl acetate copolymer, ion-crosslinked olefin copolymer (ionomer), poly-4-methylpentene-1, maleic anhydride-modified polyethylene, maleic anhydride Acid-modified polypropylene, ethylene-methacrylic acid copolymer, ethylene-acrylic acid copolymer, and other examples include thermoplastic elastomers of ethylene propylene rubber (EPR) and ethylene propylene diene rubber (EPDM). Or an example of two or more types used as a mixture It is. To each of the above materials, known additives such as coloring pigments such as titanium dioxide, fillers such as mica, silica, clay and calcium carbonate, antioxidants, slip agents, UV inhibitors and heat stabilizers are added. May be.

Although the outer layer 52 is also composed of a thermoplastic resin film, it prevents tearing when the outer layer material is peeled off.Furthermore, after peeling the outer layer material, it is used as the outermost layer of the container that actually contains the contents. It is preferable to use a stretched film having a relatively strong strength. For example, as a material, polypropylene, polyethylene, polymethylpentene-1 as a polyolefin material, nylon 6 (trademark), nylon 6.6 (trademark) as a polyamide material, and polyethylene terephthalate (as a polyester material) Examples of PET, PET, polybutylene terephthalate (PBT), polynaphthalene terephthalate (PEN), and polyvinyl materials include polystyrene, polyvinyl chloride, and polyvinylidene chloride. It is preferable to use a film that is biaxially stretched in the uniaxial or biaxial direction at the same time or every other time. For the purpose of imparting barrier properties to these films, an inorganic compound vapor deposition (eg, SiO ₂ or _{Al 2 O 3, TiO 2,} SnO 2 or a combination thereof) may be given. The inner layer material 50 is preferably transparent in order to confirm the state of the contents.

The outer layer material 30 covers the inner layer material, and can be applied with a release layer. The outer layer material 30 includes at least one layer. For example, a thermoplastic film or a metal foil can be used. As an example of a thermoplastic film, the material is polypropylene, polyethylene, polymethylpentene 1 as a polyolefin material, and nylon 6, nylon 6.6, MXD nylon, MXD nylon and nylon 6 are combined as a polyamide material. In addition, as a multilayer film having two or more layers, a polyester material, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polynaphthalene terephthalate (PEN), polyvinyl materials, polystyrene, polyvinyl chloride, polyvinylidene chloride, An ethylene polyvinyl alcohol copolymer etc. are mentioned. It is preferable to use a film that is biaxially stretched in the uniaxial or biaxial direction at the same time or every other time. For the purpose of imparting barrier properties to these films, an inorganic compound vapor deposition (eg, SiO ₂ or _{Al 2 O 3, TiO 2,} SnO 2 or a combination thereof) may be given. Further, a vinylidene chloride coat may be applied.

Examples of the metal foil used for the outer layer material 30 include aluminum foil, titanium foil, and tin foil.
The film or metal foil for the outer layer material 30 described above may be used alone or in combination of two or more. Further, the outer layer material 30 may be printed on the front surface or the back surface of the transparent film.

In addition, for each of the above materials, known additives such as coloring pigments such as titanium dioxide, fillers such as mica, silica, clay, calcium carbonate, antioxidants, slip agents, UV inhibitors, heat stabilizers, etc. May be added. As a specific example, for example, it is composed of three layers, the inner layer 31 is made of nylon, the outer layer 33 is made of PET, and a vapor deposition layer 32 of SiO ₂ or Al ₂ O ₃ is formed between the inner layer 31 and the outer layer 33. To do. By forming the vapor deposition layer 32, the barrier property of the packaging bag 10 can be improved. The inner layer 31 and the outer layer 33 are also preferably made of a material having a high barrier property.

The peeling layer 40 fixes the outer layer material 30 to the inner layer material 50 in a peelable state due to its adhesiveness. The release layer 40 is made of, for example, an acrylic resin, a polyamide resin, a silicone resin, a vinyl resin, a urethane resin, an epoxy resin, or the like alone or in combination. When adjusting the adhesive strength with the size of the area of the uncoated part of the resin, it can be formed with various pattern coats using a gravure cylinder. The larger the area of the uncoated part, the weaker the adhesive strength. Become. In addition, the release layer 40 may be coated with a resin having adhesive strength that can be appropriately released by combining the above resins.
Further, the peeling layer 40 can be formed by combining a strong adhesive resin layer and a weak adhesive resin layer. For example, a strong adhesive layer may be patterned first or a weak adhesive layer may be applied on the entire surface by a gravure cylinder. . The order of application may be reversed. These coated surfaces may be either the outermost surface of the outer layer material or the outermost surface of the inner layer material.

As another method for forming the release layer 40, a polyolefin resin layer may be formed between the inner layer material and the outer layer material in addition to the above resin using an extrusion laminator. More specifically, the polyolefin resin is more specifically low-, medium-, or high-density polyethylene, linear low-density polyethylene, isotactic polypropylene, propylene / ethylene copolymer, polybutene-1, or ethylene / propylene. Copolymer, ethylene / butene-1 copolymer, propylene / butene-1 copolymer, ethylene / vinyl acetate copolymer, ion-crosslinked olefin copolymer (ionomer), poly-4-methylpentene-1 and maleic anhydride Examples include acid-modified polyethylene, maleic anhydride-modified polypropylene, ethylene-methacrylic acid copolymer, ethylene-acrylic acid copolymer, and other thermoplastic elastomers such as ethylene propylene rubber (EPR) and ethylene propylene diene rubber (EPDM). These can be used alone or as a mixture Etc. are exemplified those used more kinds.
Further, as the release layer 40, polyurethane resin may be applied to the inner layer material 50 or the outer layer material 30 as an anchor agent, or may be subjected to ozone treatment or corona treatment as necessary.

Further, the release layer 40 can obtain a preferable distribution of peel strength by changing the adhesive strength in accordance with the required peel strength of the peel surface. For example, the outer peripheral portion (heat seal portion) of the body film 20 excluding the peeling start position 27 relatively increases the adhesive strength, and the peeling start position 27 decreases the adhesive strength. By increasing the adhesive strength of the heat seal part, it is possible to prevent the outer layer material 30 from being peeled off from the body film 20 before use. On the other hand, by reducing the adhesive strength at the peeling start position 27, the opening seal is tight. Can make

Further, it is desirable that the portion corresponding to the hole portion of the body film 20 also has a relatively strong adhesive force than the periphery thereof. This is because when the outer layer material 30 is peeled off to form a through-hole, it is necessary to peel off the portion corresponding to the hole of the inner layer material 50 attached to the outer layer material 30. Furthermore, in the portion corresponding to the hole portion close to the peeling start position 27, in order to form the hole portion more reliably, the adhesive strength is higher than the portion corresponding to the hole portion having a large opening area in the central portion of the body film 20. Is preferable.

A groove-shaped half cut 28 is formed at a predetermined position of the inner layer material 50 so that a plurality of holes are formed by peeling off the outer layer material 30. The half cut 28 is formed so as to penetrate the inner layer material 50 using, for example, laser light irradiation or a metal blade (die). It is preferable that the half cut 28 is formed on each of the two surfaces formed by the two body film 20 disposed opposite to each other because air permeability of the packaging bag 10 is improved. The half-cut processing is performed from the innermost layer (inner layer 51 in FIG. 3) of the inner layer material 50 before the pouch is made. If it is separately processed with a roll type die before bag making, it can be processed relatively easily. Of course, it is also possible to use a die set intermittently to make half-cuts in necessary parts, or to put them in a bag.

At the time of shipment from the factory, the packaging bag 10 is mounted so that the outer layer material 30 covers the inner layer material 50 by the adhesiveness of the release layer 40 (FIG. 3). In this state, because the barrier property of the outer layer material 30 prevents air from entering and exiting between the inside and the outside of the packaging bag 10, the contents maintain the initial state.

On the other hand, when the user peels the outer layer material 30 from the inner layer material 50 against the adhesive force of the release layer 40, the portion 29 surrounded by the half cut 28 is caused by the adhesive force of the release layer 40. Pulled away from 50. Thereby, the hole part 25 is formed after the part 29 pulled up (FIG. 4). Since the hole 25 penetrates the inner layer material 50 up and down, air can enter and exit between the inside and the outside of the packaging bag 10 through the hole 25. As a result, for example, if the content is a fragrance, the active ingredient evaporates and diffuses to the outside, and if the content is a deodorant, the odor component in the outside air is adsorbed.

Next, the formation pattern (formation position and opening area) of the holes 25 in the inner layer material 50 will be described. Examples of the formation pattern of the hole 25 will be described with reference to FIGS. 5 and 6, but the formation pattern of the hole of the present invention is not limited to these. Here, FIG. 5 is a plan view showing a hole pattern according to the present embodiment. FIG. 6 is a plan view showing a hole pattern according to another embodiment.

In the hole pattern shown in FIG. 5, a plurality of holes are formed at regular intervals on a straight line along the peeling direction starting from the peeling start position 27 (peeling start region). In this pattern, the peeling direction of the outer layer material 30 is a direction starting from the peeling start position 27 (upper left corner) and radiating toward the right side 20c or the lower side 20a of the trunk film 20. 5 shows an example in which a plurality of holes are respectively formed on four straight lines VA, VB, VC, VD that radiate from the peeling start position 27 for convenience of explanation. And an arbitrary pattern can be set according to the specification of the contents. In the following description, the upper left corner of the substantially rectangular trunk film 20 is set as the peeling start position 27, but the peeling start position can be set to an arbitrary position (for example, the upper right corner). Further, the planar shape of the body film can be other than a substantially rectangular shape. For example, when the body film has a substantially triangular shape, the upper top portion can be set as the peeling start position.

Taking a plurality of holes formed on the straight line VA as an example, these are all substantially circular, and the hole 25a closest to the peeling start position 27 has the smallest opening diameter, and the hole 25b, hole The opening diameter gradually increases in the order of 25c, and the opening diameter of the hole 25d arranged at the approximate center in plan view is the largest. Furthermore, the opening diameter gradually decreases in the order of the holes 25e, 25f, and 25g as it approaches the side portion 20c. That is, the plurality of holes of the packaging bag 10 have a distribution in the opening area in the peeling direction of the outer layer material 30. Furthermore, the opening area of the hole portion is the largest at the hole portion 25d in the central portion of the inner layer material 50, and decreases as it approaches the peeling start position 27, and decreases as it approaches the side portion 20c. In addition, the shape of a hole can be made into arbitrary shapes (for example, an ellipse, a rectangle, arbitrary design shapes) other than circular.

By reducing the opening area of the hole on the peeling start position 27 side in this way, the hole can be reliably formed even immediately after the start of peeling with unstable peeling strength. Breathability can be improved. Further, the air permeability can be further increased by increasing the opening area of the hole in the central portion of the inner layer material 50.

In order to prevent the contents in the packaging bag 10 from spilling out, the opening area of each hole formed in the inner layer material 50 is the outer diameter of the contents before the outer layer material 30 is peeled off for the first time after the packaging bag 10 is shipped. Is preferably smaller. In addition, in the case of using contents whose outer diameter decreases with the passage of time after the outer layer material 30 is peeled off, the opening area of the hole is set after a certain period of time (for example, recommended replacement period of contents) after the start of use. It is preferable to make it smaller than the assumed outer diameter of the contents.

As long as the hole near the peeling start position 27 is smaller than the hole at the center, the opening area of the hole can be arbitrarily set. For example, in the example of FIG. 5, the hole 25a, the hole 25b, and the hole 25c may have the same area, or the hole 25b, the hole 25c, and the hole 25d may have the same area. In addition, if the opening area of the hole portion in the central portion is larger than the opening area of the hole portion on the most side or lower side, the opening area of the hole portion from the center portion to the side or lower side can be arbitrarily set. it can.
Further, if the opening area of the plurality of holes formed on each straight line is larger on the straight line VB side (upper side) than the straight line VD side, the air permeability can be further improved.

In order to reliably form the hole by peeling off the outer layer material 30, it is preferable to give a distribution to the adhesive strength (adhesive strength) of the release layer 40. Specifically, the adhesive strength of the part corresponding to each hole formed in the inner layer material 50 is preferably higher than that of the other parts. Furthermore, among the portions corresponding to the respective holes, it is preferable to have a distribution of the adhesive strength in the peeling direction. For example, if the adhesive strength of the portion corresponding to the hole near the peeling start position 27 is increased, the hole can be formed reliably even immediately after the start of peeling. As a method for controlling the adhesive strength of the release layer 40, as described above, a pattern coat is applied when laminating the release layer 40, and a desired portion is pressed or heated after the laminate is formed. It is also possible to increase.

The shape of the hole, the opening area, and the adhesive strength are not limited to the above description, and can be set in any combination so that the plurality of holes open with a desired opening area.

Moreover, if the air permeability of the packaging bag 10 can be ensured, the hole can be formed only in a certain range of the inner layer material 50. For example, in the example of FIG. 5, the range in which the hole is provided may be limited from the peeling start position 27 to the central portion. The outer layer material 30 is preferably laminated so as to cover the entire outer surface of the inner layer material 50 when a hole is provided on the entire surface of the inner layer material 20. On the other hand, when the hole is formed only in a certain range of the inner layer material 50, the outer layer material 30 may be laminated only in a region corresponding to the hole.

On the other hand, in the hole pattern shown in FIG. 6, a plurality of holes are formed at regular intervals on a straight line VIA along the peeling direction starting from the peeling start position 27, and a straight line VIB parallel to the straight line VIA is formed. A plurality of holes are formed on the VIC and VID at regular intervals. 6 also shows an example in which a plurality of holes are formed on the four straight lines VIA, VIB, VIC, and VID for convenience of explanation, but depending on the specifications of the packaging bag 10 and the contents. Arbitrary patterns can be set. Moreover, although the hole part in the pattern shown in FIG. 6 is also substantially circular shape, the shape of a hole part can be made into arbitrary shapes (for example, ellipse, a rectangle, arbitrary design shapes) other than circular.

Taking a plurality of holes formed on the straight line VIA as an example, the hole 125a closest to the peeling start position 27 has the smallest opening diameter, and the opening diameter gradually increases in the order of the holes 125b, 125c, and 125d. Therefore, the opening diameter of the hole 125e disposed at the approximate center in plan view is the largest. Furthermore, the opening diameter gradually decreases in the order of the holes 125f, 125g, and 125h as it approaches the side portion 20c. That is, the plurality of holes of the packaging bag 10 have a distribution in the opening area in the peeling direction of the outer layer material 30. Further, the opening area of the hole portion is the largest at the hole portion 125e in the central portion of the body film 20, and becomes smaller as it approaches the peeling start position 27 and decreases as it approaches the side portion 20c. The operation, effect, and modification of the hole pattern are the same as those of the pattern shown in FIG.

Next, the configuration of the peeling start position 27 will be described. 7 to 9 will be described as configuration examples of the peeling start position 27, but the configuration of the peeling start position of the present invention is not limited to these. Here, FIG. 7 is a partial cross-sectional view in the thickness direction showing the layer configuration near the peeling start position 27 of the packaging bag 10 according to the present embodiment. FIG. 8 is a partial cross-sectional view in the thickness direction showing the layer structure near the peeling start position of the packaging bag according to another embodiment. FIG. 9 is a partial cross-sectional view in the thickness direction showing the layer structure near the peeling start position of a packaging bag according to still another embodiment.

In the example shown in FIG. 7, the peeling layer 40 is not laminated | stacked between the peeling start position 27 of the trunk | drum film 20, and the peeling start piece 37 of the outer layer material 30 corresponding to this. That is, since the peeling start piece 37 is not bonded to the inner layer material 50, the peeling start piece 37 as a trigger for peeling is reliably formed. Therefore, when the peeling start piece 37 is gripped and the outer layer material 30 is peeled toward the side portion 20c or the lower portion 20a, the outer layer material 30 can be peeled off with an easy and stable force. Can be reliably opened over the entire surface of the inner layer material 50. Thus, since a plurality of holes can be opened reliably, the inside and outside of the packaging bag 10 can be reliably ventilated, and the packaging bag 10 can be provided without spilling the contents. .

In the example shown in FIG. 8, while the outer layer material 30 is laminated on the inner layer material 50 via the release layer 40, a groove-shaped half cut 37a is formed on the peeling start piece 37 of the outer layer material 30 by a die or a laser. ing. If it does in this way, since it can bend the trunk | drum film 20 from the half cut part 37a at the time of the peeling start of the outer layer material 30, and the cut cross section of the outer layer material 30 can be exposed, subsequent peeling can be performed easily.

A groove-shaped half cut may be formed in the inner layer material 50. In this case, it is desirable to prevent the peeling start piece 37 from being thermally bonded to the opposing film. When the peeling start position 27 portion has such a configuration, the peeling start position 27 portion of the body film 20 is excised from the remaining portion of the inner layer material 50 together with the outer layer material 30 and the peeling layer 40 at the start of peeling of the outer layer material 30. Is done. As a result, the outer layer material 30 can be peeled off with an easy and stable force, and a hole having a desired shape can be reliably opened over the entire surface of the inner layer material 50, as in the example shown in FIG. It is. These half-cut processes can be performed before bag making and can be processed before heat sealing during bag making. Further, when processing from the outer surface, it can be processed before bag making and after heat sealing during bag making. Laser processing is possible as well.

In the example shown in FIG. 9, the peeling start piece 37 protrudes outward with respect to the inner layer material 50 without forming the inner layer material 50 and the peeling layer 40 in the region corresponding to the peeling start position 27. As a result, the outer layer material 30 can be peeled off with an easy and stable force, and a hole having a desired shape can be reliably opened over the entire surface of the inner layer material 50, as in the example shown in FIG. It is.

With the configuration described above, the following effects are achieved according to the above embodiment.
(1) Since the packaging bag 10 is configured as a pouch, it is possible to suppress an increase in weight and outer shape as in a molded product. Thereby, the degree of freedom of the place where the packaging bag 10 is used can be increased, and the manufacturing and transport costs can be reduced. Furthermore, since it can be folded and reduced in size after use, it is highly disposable.
(2) Since there is a distribution in the opening area of the plurality of holes, improvement in air permeability and prevention of spilling of the contents can be realized at the same time.
(3) By reducing the opening area of the hole on the peeling start position side, all the holes can be reliably opened, and the air permeability can be further improved.
(4) Breathability can be improved by enlarging the central hole.

Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above embodiment, and can be improved or changed within the scope of the purpose of the improvement or the idea of the present invention.

As described above, the packaging bag according to the present invention is suitable for a packaging container that contains a fragrance, a deodorant, and other contents. Moreover, not only using the packaging bag of the present invention alone, but also putting the packaging bag of the present invention with the outer surface peeled off and opened in a plastic molded outer case provided with an opening. It can also be applied to the usage form used. In this form, after the expiration date of the contents expires, only the packaging bag can be replaced with a new one, which contributes to the reduction of waste.

It is a top view which shows the state which folded the packaging bag which concerns on embodiment of this invention. It is a perspective view which shows the structure of the packaging bag which concerns on embodiment of this invention. It is a partial cross section figure of the thickness direction which shows the layer structure of the trunk | drum film in the packaging bag which concerns on embodiment of this invention. FIG. 4 is a partial cross-sectional view corresponding to FIG. 3 showing a state when the outer layer material is peeled off. It is a top view which shows the pattern of the hole which concerns on embodiment of this invention. It is a top view which shows the pattern of the hole which concerns on another embodiment of this invention. It is a partial cross section figure of the thickness direction which shows the layer structure of the peeling start position vicinity of the packaging bag which concerns on embodiment of this invention. It is a partial cross section figure of the thickness direction which shows the layer structure of the peeling start position vicinity of the packaging bag which concerns on another embodiment of this invention. It is a partial cross section figure of the thickness direction which shows the layer structure of the peeling start position vicinity of the packaging bag which concerns on another embodiment of this invention.

Explanation of symbols

10 packaging bag 20 body film 25 hole 25a hole 25b hole 25c hole 25d hole 25e hole 25f hole 25g hole 27 peeling start position 28 half cut 30 outer layer material 32 vapor deposition layer 37 peeling start piece 37a half Cut 40 Release layer 50 Inner layer material

Claims (12)

A laminate having a self-supporting shape having at least two opposing surfaces, and an inner layer material in which an outer layer material is laminated on at least a part of the outer surface via a release layer on at least one of the opposing surfaces. A packaging bag formed from
By peeling the outer layer material, the inner layer material is formed with a plurality of holes leading to the inside of the packaging bag,
It said plurality of holes are distributed in the opening area there is,
The opening area of the plurality of holes is smaller on the peeling start position side of the outer layer material than on the central portion of the inner layer material, and the central portion of the inner layer material is on the side and lower sides. A packaging bag characterized by being larger than . 2. The packaging bag according to claim 1, wherein an opening area of the plurality of holes is smaller than an outer diameter of a content accommodated in the packaging bag before the outer layer material is peeled for the first time . The packaging bag of Claim 1 or Claim 2 with distribution in the peeling strength of the said inner-layer material and the said outer-layer material through the said peeling layer . The packaging bag according to any one of claims 1 to 3, wherein the plurality of holes are formed in a certain range on the peeling start position side . The packaging bag according to any one of claims 1 to 4, wherein the outer layer material is laminated so as to cover the entire outer surface of the inner layer material . The packaging bag according to any one of claims 1 to 4 , wherein the outer layer material is stacked in a region of the inner layer material where the hole is formed . The packaging bag according to any one of claims 1 to 6, wherein a peeling layer is not laminated between the outer layer material and the inner layer material at the peeling start position . The groove | channel is formed in the said outer-layer material in the said peeling start position, When peeling the said outer-layer material from the said inner-layer material, an outer-layer material is peeled from the said peeling start position by the said groove | channel . The packaging bag of any one of Claims. The packaging bag according to any one of claims 1 to 6, wherein the outer layer material projects outward from the inner layer material at the peeling start position. The packaging bag according to any one of claims 1 to 9, wherein the plurality of holes are respectively formed in the facing surfaces of the packaging bag. The groove | channel shape corresponding to the external shape of the said hole which opens by peeling off the said outer layer material is formed in the said inner layer material using any one of Claims 1-10. Packaging bags. The packaging bag according to claim 8 , wherein the groove formed in the outer layer material is formed by laser groove processing .

Images