JP7049161B2 - Packaging bags, how to use packaging bags, and how to manufacture packaging bags - Google Patents

Description

The present invention relates to a packaging bag, a method of using the packaging bag, and a method of manufacturing the packaging bag.

The conventional packaging bag contains, for example, articles such as toilet paper, and the handle portion and the main body portion of the packaging bag are provided with cuts (perforations, etc.) for opening the packaging bag. Japanese Patent Application Laid-Open No. 2015-63316 (Patent Document 1) provides a perforation for opening between two finger hook holes in the handle portion of the packaging bag. Further, in Japanese Patent Application Laid-Open No. 11-001240 (Patent Document 2), perforations for opening are formed in a T shape from the upper surface to the front surface (or rear surface) of the packaging bag.

Japanese Patent Application Laid-Open No. 2015-63316 Japanese Unexamined Patent Publication No. 11-001240

However, in the conventional packaging bag, the place where the perforation is provided and how to open the packaging bag may not be known, and the user may forcibly open the package from the place where the perforation is not provided. Therefore, a strong force is required to open the packaging bag, which makes it difficult for some users to open it. In addition, since the place to open and the state after opening differ depending on the user, it may be difficult to take out the product from the packaging bag after opening. Furthermore, even when the package is opened along the perforations for opening, the handle and the center of the main body of the packaging bag tend to be severely torn, and the remaining product is stored cleanly in the packaging bag after opening. It can be difficult to do.

An object of the present invention is to provide a packaging bag having excellent openability, take-out property, and storeability after opening.

The first aspect of the present invention is a main body portion formed in a gusset shape with a tubular film and accommodating an object to be packaged, and a handle portion provided integrally with the main body portion on the top surface portion of the main body portion. The top surface portion of the main body portion is connected to a pair of upper surface portions whose front surface portion is connected to the lower end edge of the handle portion and a back surface portion of the upper surface portion, and is below the upper surface portion. It is a packaging bag having a pair of overlapping lower surface portions, and having a first slit formed near the center of the top surface portion of at least one of the lower surface portions of the pair of lower surface portions. ..

In the first aspect, since the first slit is formed near the center of the top surface portion of at least one of the lower surface portions of the pair of lower surface portions, the lower surface portion on which the first slit is formed is pinched and the handle portion is formed. When pulled in the longitudinal direction of, the lower surface portion of the top surface portion is torn from the center portion of the top surface portion. Further, when a part of the torn lower surface portion is further pulled out to the outside of the main body portion, the back surface portion of the upper surface portion connected to the lower surface portion is torn along the lower end edge of the handle portion. Thereby, in the first aspect, a part of the top surface portion can be opened while leaving the surface portion of the upper surface portion.

Further, since the main body tends to be torn linearly in the height direction of the handle (the direction in which the tubular film is stretched or the direction in which the top surface and the bottom surface of the main body face each other), the main body tends to be torn outside the main body. When a part of the pulled-out top surface portion (a part of the lower surface portion and a part of the back surface portion of the upper surface portion) is further pulled down, the side surface portion of the main body portion is opened cleanly. As described above, in the first aspect, the packaging bag can be opened neatly with a small force. Therefore, according to the first aspect, it is possible to provide a packaging bag having excellent openability.

Further, in the first aspect, since the side surface of the main body portion is opened cleanly as described above, it is easy to take out the packaged object contained in the packaging bag. Therefore, according to the first aspect, it is possible to provide a packaging bag having excellent product take-out property.

Further, in the first aspect, the side surface of the main body portion is neatly opened as described above, so that the package bag is formed of broken pieces (a part of the torn lower surface portion and a part of the back surface portion of the upper surface portion). A part of the top surface) also has a beautiful shape. Therefore, by taking out a part of the packaged object and then putting (returning) this fragment into the packaging bag, the product remaining in the packaging bag can be covered, so that the product can be covered with dust even after opening. Can be protected. Therefore, according to the first aspect, it is possible to provide a packaging bag having excellent storability after opening.

Further, in the first aspect, when the packaging bag is opened, only a part of the lower surface portion and the upper surface portion (the back surface portion of the upper surface portion connected to the lower surface portion) of the top surface portion of the main body portion is torn, and the rest of the top surface portion is torn. The portion (the portion connecting the handle portion and the side surface portion of the main body portion or the surface portion of the upper surface portion) remains unbroken. Therefore, even after the packaging bag is opened, the unused product can be carried by grasping the handle portion while being stored in the packaging bag. Therefore, according to the first aspect, it is possible to provide a packaging bag having excellent portability even after opening.

Further, in the first aspect, since the packaging bag can be opened neatly as described above, it is possible to provide a packaging bag whose appearance is not impaired even after opening. Therefore, according to the first aspect, it is possible to provide a packaging bag having a good appearance even after opening.

A second aspect of the present invention is a packaging bag in which the first slit extends in the thickness direction of the handle portion. In the second aspect, since the first slit extends in the thickness direction of the handle portion and is formed on the lower surface portion, when the lower surface portion is pinched and pulled in the longitudinal direction of the handle portion, the lower surface portion of the top surface portion is heavenly. It becomes easy to tear from the center of the surface. Further, since the direction in which the lower surface portion is torn is toward the lower end edge side of the handle portion, when a part of the torn lower surface portion is pulled out to the outside of the main body portion, the back surface portion of the upper surface portion connected to the lower surface portion becomes the handle portion. It becomes easy to tear along the lower edge of. Therefore, in the second aspect, the packaging bag can be opened with less force.

A third aspect of the present invention is a packaging bag in which the first slit is formed on any lower surface portion of the pair of lower surface portions. In the third aspect, since the first slits are formed on both lower surface portions of the pair of lower surface portions, the packaging bag can be opened from any of the pair of lower surface portions. Therefore, according to the third aspect, the degree of freedom in the opening operation of the packaging bag can be increased.

In a fourth aspect of the present invention, a second slit is formed near the side edge of the handle portion of the back surface portion of the upper surface portion connected to the lower surface portion on which the first slit is formed. It is a packaging bag. In the fourth aspect, in addition to the first slit formed on the lower surface portion, such a second slit is provided on the back surface portion of the upper surface portion. Therefore, when a part of the top surface portion pulled out to the outside of the main body portion is further pulled down, the back surface portion of the upper surface portion torn along the lower end edge of the handle portion is further torn along the second slit. , A part of the top surface of the main body (the back surface of the upper surface) can be opened cleanly.

In the fifth aspect of the present invention, the packaging bag extends from the lower end edge side of the handle portion toward the upper end edge side of the main body portion. In the fifth aspect, since the second slit extending from the lower end edge side of the handle portion toward the upper end edge side of the main body portion is provided on the back surface portion of the upper surface portion, the upper surface torn along the lower end edge of the handle portion. The back surface portion of the portion is easily torn continuously along the second slit to the side surface portion of the main body portion. Therefore, according to the fifth aspect, a part of the top surface portion (back surface portion of the upper surface portion) of the main body portion can be opened cleanly with less force.

A sixth aspect of the present invention is a packaging bag in which the second slit further has an extension slit extending from the top surface side of the main body portion toward the bottom surface portion side of the main body portion. In the sixth aspect, since such an extension slit is included in the second slit, when a part of the top surface portion pulled out to the outside of the main body portion is further pulled down, the side surface portion of the main body portion becomes the extension slit. Since it is torn along, the side surface of the main body can be opened more neatly.

A seventh aspect of the present invention is the method of using the packaging bag, in which the lower surface portion of the lower surface portion where the first slit is formed is broken, and the lower surface portion in which the first slit is partially broken is used as a handle portion. It is a method of using a packaging bag, characterized in that it is pulled out to the outside of the main body portion along the longitudinal direction.

In the seventh aspect, the portion of the lower surface portion of the top surface portion where the first slit is formed is broken, and the partially broken lower surface portion is pulled out of the main body portion along the longitudinal direction of the hand portion. The lower surface portion of the top surface portion is torn from the center portion of the top surface portion, and the back surface portion of the upper surface portion connected to the lower surface portion is torn along the lower end edge of the handle portion. As a result, a part of the top surface portion can be opened while leaving the surface portion of the upper surface portion. Therefore, in the seventh aspect, the same effect as that of the packaging bag according to the first aspect can be obtained. That is, according to the seventh aspect, it is possible to provide a packaging bag having excellent openability.

An eighth aspect of the present invention is a method of using a packaging bag in which a part of the lower surface portion is further pulled down toward the bottom surface portion of the main body portion. In the eighth aspect, since the main body portion tends to be torn linearly in the height direction of the handle portion as described above, a part of the top surface portion (a part of the lower surface portion and a part of the lower surface portion) pulled out to the outside of the main body portion. By further pulling down (a part of the back surface portion of the upper surface portion), the side surface portion of the main body portion can be opened neatly. Therefore, in the eighth aspect, the same effect as that of the packaging bag according to the first aspect can be obtained. That is, according to the eighth aspect, it is possible to provide a packaging bag having excellent openability and product take-out property and having a good appearance even after opening.

Further, in the eighth aspect, when the packaging bag is opened, only a part of the lower surface portion and the upper surface portion (the back surface portion of the upper surface portion connected to the lower surface portion) of the top surface portion of the main body portion is torn, and the rest of the top surface portion is torn. The portion (the portion connecting the handle portion and the side surface portion of the main body portion or the surface portion of the upper surface portion) remains unbroken. Therefore, even after the packaging bag is opened, the unused product can be carried by grasping the handle portion while being stored in the packaging bag. Therefore, in the eighth aspect, the same effect as that of the packaging bag according to the first aspect can be obtained. That is, according to the eighth aspect, it is possible to provide a packaging bag having excellent portability even after opening.

A ninth aspect of the present invention is a method of using a packaging bag in which a part of the lower surface portion is further inserted inside the main body portion. In the ninth aspect, a part of the lower surface portion is further inserted inside the main body portion, so that a part of the broken main body portion (a part of the lower surface portion, a part of the back surface portion of the upper surface portion, and a side surface portion) is inserted. It is possible to cover the product remaining in the packaging bag after removing a part of the packaged object. As a result, in the ninth aspect, the product can be protected from dust even after opening, so that the same effect as that of the packaging bag according to the first aspect can be obtained. That is, according to the ninth aspect, it is possible to provide a packaging bag having excellent storability after opening.

A tenth aspect of the present invention is a main body portion formed in a gusset shape by a tubular film and accommodating a packaged object, and a handle portion provided integrally with the main body portion on the top surface portion of the main body portion. The top surface portion of the main body portion has a pair of upper surface portions connected to the lower end edge of the handle portion and a pair of lower surface portions connected to the upper surface portion and overlapped below the upper surface portion. A method for manufacturing a packaging bag having a gusset-forming step of folding a tubular film into a gusset shape to form a gusset-shaped sheet, and a gusset-forming step of at least one of the pair of lower surface portions near the center of the top surface portion. In addition, it is a method for manufacturing a packaging bag, which comprises a slit forming step of forming a first slit.

In the tenth aspect, since the first slit can be formed near the center of at least one of the top surface portions of the pair of lower surface portions by such a slit forming step, the packaging bag according to the first aspect can be formed. A similar effect can be obtained. That is, according to the tenth aspect, it is possible to provide a packaging bag which is excellent in openability, product take-out property, storeability after opening, portability after opening, and looks good even after opening.

In the eleventh aspect of the present invention, in the slit forming step, the back surface portion of the upper surface portion connected to the lower surface portion on which the first slit is formed is located near the side edge of the handle portion in the longitudinal direction. , A method of manufacturing a packaging bag, which comprises a step of forming a second slit. In the eleventh aspect, the second slit can be formed near the side edge of the handle portion of the back surface portion of the upper surface portion connected to the lower surface portion on which the first slit is formed by such a slit forming step. Therefore, the same effect as that of the packaging bag according to the fourth aspect can be obtained. That is, according to the eleventh aspect, it is possible to provide a packaging bag capable of opening the side surface portion of the main body portion more cleanly.

A twelfth aspect of the present invention is a method for manufacturing a packaging bag, in which the slit forming step is performed before the gusset forming step. In the twelfth aspect, the first slit can be reliably formed on the top surface portion by the slit forming step before the gusset forming step. Further, even when the second slit (slit base) is provided, the second slit (slit base) can be reliably formed on the top surface portion at the same time as the formation of the first slit 50. Further, when the second slit (extension slit) is formed, the second slit (extension slit) can be reliably formed on the second side surface portion at the same time as the formation of the first slit and the second slit (slit base portion). can.

A thirteenth aspect of the present invention is a method for manufacturing a packaging bag, in which the slit forming step is performed after the gusset forming step. In the thirteenth aspect, although a dummy slit that does not contribute to the opening of the packaging bag is formed by the slit forming step after the gusset forming step, the first slit and the first slit in the state of the tubular film folded into the gusset shape are formed. Two slits can be formed. Therefore, in the step of forming the slit for finger hooking on the hand portion, which is performed after the step of forming the gusset, the first slit and the second slit can be formed at the same time as the slit for finger hooking is formed. As a result, it is not necessary to separately provide a step of forming only the first slit and the second slit, so that the manufacturing cost can be suppressed.

According to one aspect of the present invention, it is possible to provide a packaging bag having excellent openability, take-out property, and storeability after opening.

It is a perspective view which shows the packaging bag (1st Embodiment) which concerns on embodiment of this invention. It is a plan view of FIG. It is a front view of FIG. It is a right side view of FIG. It is a development view which developed the handle part in the right side view of FIG. It is a developed view which shows the packaging bag (second embodiment) which concerns on embodiment of this invention. It is a developed view which shows the packaging bag (third embodiment) which concerns on embodiment of this invention. It is a perspective view which shows the packaging bag (a modification of 1st Embodiment) which concerns on embodiment of this invention. It is a figure explaining the use method of the packaging bag which concerns on embodiment of this invention. It is a figure explaining an example of the usage mode of the packaging bag which concerns on embodiment of this invention. It is a figure explaining an example of the usage mode of the packaging bag which concerns on embodiment of this invention. It is a figure explaining an example of the usage mode of the packaging bag which concerns on embodiment of this invention. It is a figure explaining an example of the usage mode of the packaging bag which concerns on embodiment of this invention. It is a flowchart which shows an example of the use method of the packaging bag which concerns on embodiment of this invention. It is a flowchart which shows an example of the manufacturing method of the packaging bag which concerns on this embodiment. It is a figure which shows the process of manufacturing the packaging bag which concerns on this embodiment. It is a figure which shows an example of the semi-finished product obtained in the manufacturing process shown in FIG. It is a flowchart which shows the other example of the manufacturing method of the packaging bag which concerns on this embodiment. It is a figure which shows an example of the manufacturing process which realizes the manufacturing method of the packaging bag shown in FIG. It is a figure which shows an example of the semi-finished product obtained in the manufacturing process shown in FIG. It is a perspective view which shows the packaging bag (4th Embodiment) which concerns on embodiment of this invention. FIG. 21 is a plan view of FIG. It is a front view of FIG. 21. It is a right side view of FIG. It is a figure which shows the conventional packaging bag (comparative example 1). It is a figure which shows the conventional packaging bag (comparative example 2). It is a figure which shows the conventional packaging bag (comparative example 3). It is a figure which shows the conventional packaging bag (comparative example 4). It is a figure which shows the conventional packaging bag (comparative example 5).

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For ease of understanding, the scale of each member in each figure may differ from the actual scale. Further, in the description shown below, the parts common to each figure may be designated by the same reference numerals and the description thereof may be omitted.

<Packaging bag>
First, the packaging bag according to the embodiment of the present invention will be described. FIG. 1 is a perspective view showing a packaging bag according to the first embodiment of the present invention. 2 is a plan view of FIG. 1, FIG. 3 is a front view of FIG. 1, and FIG. 4 is a right side view of FIG. 1. Further, FIG. 5 is a developed view of the handle portion in the right side view of FIG. 4.

In FIG. 1, the packaging bag 100 includes a main body portion 10, a handle portion 20, a finger hook portion 30, and a seal portion 40. The packaging bag 100 is manufactured from a resin film or the like using a bag making machine. The packaging bag 100 is an example of the packaging bag of the present invention. Further, the main body portion 10 and the handle portion 20 are examples of the main body portion and the handle portion constituting the packaging bag of the present invention.

The main body 10 constitutes the main body of the packaging bag 100 in which the packaged body T is housed. The main body 10 is formed of a tubular film (cylindrical film TF, which will be described later) (see FIGS. 16, 17, 19, and 20). The main body 10 has a structure formed by forming the tubular film TF into a bag shape and folding the tubular film TF into a gusset shape (FIGS. 1 to 5, 16, 17, 17, and 19). , See FIG. 20).

The material of the resin film forming the main body 10 is arbitrary. As such a resin film, for example, a resin film such as polyethylene (PE), a laminate of PE-ethylene vinyl alcohol copolymer (EVOH) -PE (PE / EVOH / PE) can be used. The thickness of the resin film is arbitrary. For example, when PE or PE / EVOH / PE is used as the resin film, the thickness of the resin film can be 10 to 70 μm, preferably 15 to 60 μm, and more preferably 20 to 50 μm.

The main body 10 contains 12 roll-shaped toilet papers as an example of the packaged body T (see FIG. 1). The form of the packaged body is not limited to the roll form, and may be accommodated in another form such as a laminated form. Further, the packaged body accommodated in the main body 10 is not limited to toilet paper, and can accommodate articles such as tissue paper, kitchen paper, baby or nursing paper diapers, and menstrual napkins. ..

Further, the number of articles accommodated in the main body 10 is not limited to one, and may be one or a plurality as shown in FIG. In the example shown in FIG. 1, a total of 12 toilet papers (packaged body T) are formed by stacking four roll-shaped toilet papers (packaged body T) in three layers. It is housed in the main body 10. However, the arrangement of the packaged body housed in the main body portion 10 is not limited to this arrangement, and for example, 12 toilet papers (packaged body T) are arranged in a single stage on the main body portion 10. May be accommodated.

As shown in FIGS. 1 to 4, the handle portion 20 is provided on the top surface portion 11 of the main body portion 10 and constitutes a portion for gripping the packaging bag 100 with fingers. The handle portion 20 can be formed of a resin film or the like, similarly to the main body portion 10. The handle portion 20 is formed on the top surface portion 11 of the main body portion 10 by heat fusion (heat sealing). The position where the handle portion 20 is provided is not limited to the top surface portion 11 of the main body portion 10, and may be the side surface of the main body portion 10. For heat fusion (heat sealing), for example, a method (stamp method) of embossing the resin film folded into the gusset shape with a heat plate for handle molding can be used.

As shown in FIGS. 1 to 4, the handle portion 20 is provided integrally with the main body portion 10 on the top surface portion 11 described later of the main body portion 10, and constitutes a portion for gripping the packaging bag 100 with fingers. The handle portion 20 can be formed of a resin film or the like, similarly to the main body portion 10. The handle portion 20 has an air hole (in which the main body portion 10 and the outside of the packaging bag 100 are communicated with each other so that the main body portion 10 to which the handle portion 20 is attached does not explode during the manufacturing or distribution of the packaging bag 100. (Not shown) may be provided.

The handle portion 20 is formed on the top surface portion 11 of the main body portion 10 by the seal portion 40 formed by heat fusion (heat sealing). The position where the handle portion 20 is provided is not limited to the top surface portion of the main body portion 10, and may be the side surface of the main body portion 10. For heat fusion (heat sealing), for example, a method (stamp method) of embossing the resin film folded into the gusset shape with a heat plate for handle molding can be used.

The handle portion 20 is provided with a finger hook portion 30 for hooking a finger when gripping the handle portion 20. The finger hook portion 30 is formed in the central portion of the flat surface portion 25 of the handle portion 20. Further, the finger hook portion 30 is formed by an elliptical slit. The form of the slit is arbitrary, and for example, it can be formed at a perforation, and a finger hook can be formed by breaking the perforation.

The shape of the finger hook portion 30 is not limited to an elliptical shape, but may be a linear shape, a curved shape, a circular shape, an elliptical shape, a quadrangular shape, or a shape similar thereto. Further, although the finger hook portion 30 is formed by one slit, the number of slits is not limited. Therefore, the finger hook portion 30 may be formed by two or more slits. Such a finger hook can be formed, for example, by two slits arranged at predetermined intervals in the longitudinal direction of the handle portion (X direction in FIG. 1) (see FIG. 8).

The finger hook portion 30 is surrounded by a heat seal (not shown) and is arranged on the handle portion 20. That is, the finger hook portion 30 is arranged inside the heat seal and away from the heat seal. Further, the handle portion 20 may be provided with a reinforcing film (not shown). The mode of attaching the reinforcing film to the handle portion 20 is arbitrary, and it can be attached to the handle portion 20 by heat fusion (heat sealing) in the same manner as the formation of the handle portion 20.

This reinforcing film can be formed of a strip-shaped resin film. The material of the reinforcing film is arbitrary, and may be the same as or different from the material of the resin film constituting the handle portion 20. Examples of such a resin film include a laminate of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and PE-ethylene vinyl alcohol copolymer (EVOH) -PE (PE / EVOH / PE). And other resin films can be used. By providing such a reinforcing film, it is possible to reinforce the portion of the handle portion 20 where the finger hook portion 30 is provided.

Further, the thickness dimension of the reinforcing film is arbitrary. For example, the thickness of the reinforcing film can be 20 μm or more, preferably 30 μm to 150 μm, and more preferably 50 μm to 130 μm. By setting the thickness dimension of the reinforcing film within such a range, it is possible to prevent the handle portion 20 from being stretched or broken. Further, the reinforcing film can be reliably adhered to the handle portion 20 by the above-mentioned heat welding or the like.

In the packaging bag 100 according to the first embodiment, as shown in FIGS. 1 to 4, the main body portion 10 has a top surface portion 11, a bottom surface portion 12, a pair of first side surface portions 13, and a pair of second side surface portions 14. Has. The top surface portion 11 is formed on the upper side of the main body portion 10. The bottom surface portion 12 is formed on the lower side of the main body portion 10 and faces the top surface portion 11 in the Z direction. The pair of first side surface portions 13 are arranged between the top surface portion 11 and the bottom surface portion 12 and face each other in the Y direction. The pair of second side surface portions 14 are arranged between the top surface portion 11 and the bottom surface portion 12 and face each other in the X direction.

The top surface portion 11 of the main body portion 10 is composed of a pair of upper surface portions 11a and a pair of lower surface portions 11b. As shown in FIGS. 1 to 5, the pair of upper surface portions 11a forming a part of the top surface portion 11 is composed of a front surface portion SP and a back surface portion BP folded back by the first folding portion GF1. Then, the surface portion SP of the upper surface portion 11a is connected to the lower end edge 22 of the handle portion 20 via the connecting portion 11c, and further connected to the upper end edge 13a (upper end edge of the main body portion) of the first side surface portion 13. There is.

Further, as shown in FIGS. 1 to 5, the pair of lower surface portions 11b forming a part of the top surface portion 11 are connected to the back surface portion BP of the upper surface portion 11a and overlap below the upper surface portion 11a. Specifically, the pair of lower surface portions 11b are connected to the lower end edge 22 of the handle portion 20 and the back surface portion BP of the upper surface portion 11a via the second folding portion GF2, and are connected to the upper surface portion via the third folding portion GF3. It is connected to the back surface portion BP of the portion 11a, and further connected to the upper end edge 14a (upper end edge of the main body portion) of the second side surface portion 14.
In the developed view of FIG. 5, the second folding portion GF2 is shown by a alternate long and short dash line.

In the first embodiment, as shown in FIGS. 1 to 5, the first slit 50 is formed in the lower surface portion 11b on the side end edge 24 side of the handle portion 20 among the pair of lower surface portions 11b. Further, the first slit 50 is provided near the central portion of the top surface portion 11. Specifically, the first slit 50 is provided in the lower surface portion 11b in the vicinity of the second folding portion GF2 and in the vicinity of the third folding portion GF3.

The form of the first slit 50 is arbitrary, and can be formed by, for example, a notch such as a perforation. In the present embodiment, the first slit 50 is formed at a perforation, and a notch is formed by breaking the perforation. In the first embodiment, as shown in FIGS. 1 to 5, the perforations forming the first slit 50 are shown by broken lines.

Further, in the first embodiment, the first slit 50 extends in the thickness direction of the handle portion 20 (the direction in which the two flat portions 25 face each other when the handle portion 20 is upright, hereinafter referred to as the Y direction). It is formed on the lower surface portion 11b. Specifically, the first slit 50 is abbreviated as the longitudinal direction of the handle portion 20 (the direction in which the side end edge 23 and the side end edge 24 face each other when the handle portion 20 is upright, hereinafter referred to as the X direction). It is provided so as to extend at right angles.

The shape of the first slit 50 is not particularly limited, and can be a straight line, a curved line, or the like. In the present embodiment, it is formed by linear perforations extending substantially parallel to the upper end edge 14a of the pair of second side surface portions 14.

In the first embodiment, the first slit 50 is formed only on the lower surface portion 11b on the side end edge 24 side of the handle portion 20 among the pair of lower surface portions 11b, but the pair of lower surface portions 11b. It may be formed on any lower surface portion 11b. That is, the first slit 50 may not be formed on the lower surface portion 11b on the side end edge 24 side of the handle portion 20, but may be provided only on the lower surface portion 11b on the side end edge 23 side of the handle portion 20. Further, the first slit 50 may be formed on the lower surface portion 11b on the side end edge 23 side of the handle portion 20, and further provided on the lower surface portion 11b on the side end edge 24 side of the handle portion 20.

Further, in the first embodiment, the second slit 60 is formed near the side end edge 24 of the handle portion 20 of the back surface portion BP of the upper surface portion 11a connected to the lower surface portion 11b on which the first slit 50 is formed. ing. Specifically, the second slit 60 is provided as a slit base 61 in the back surface portion BP in the vicinity of the lower end edge 22 near the side end edge 24 of the handle portion 20. The second slit 60 (slit base 61) may be separated from the lower end edge 22 of the handle portion 20, but is preferably connected to the lower end edge 22 of the handle portion 20.

The form of the second slit 60 is arbitrary, and can be formed by, for example, a notch such as a perforation. In the present embodiment, the second slit 60 is formed with the same perforations as the first slit 50. In the first embodiment, as shown in FIGS. 1 to 5, the perforations forming the second slit 60 are shown by broken lines as in the first slit 50.

The shape of the second slit 60 is not particularly limited, and may be a straight line, an oblique line, a curved line, a curved line, or a shape similar to these. In the present embodiment, it is formed by linear perforations extending substantially parallel to the upper end edge 14a of the pair of second side surface portions 14.

Further, in the first embodiment, the second slit 60 extends from the lower end edge 22 side of the handle portion 20 toward the upper end edge side of the main body portion 10. Specifically, as shown in FIGS. 1 to 5, the second slit 60 is a pair of first side surface portions of the main body portion 10 from the lower end edge 22 side of the handle portion 20 along the first folding portion GF1. It extends toward the upper end edge 13a side of 13.

Further, in the first embodiment, the second slit 60 further has an extension slit 62 in addition to the slit base 61 described above. The extension slit 62 extends from the top surface portion 11 side of the main body portion 10 toward the bottom surface portion 12 side of the main body portion 10. Specifically, as shown in FIGS. 1 to 5, the second slit 60 is composed of a slit base 61 and an extension slit 62 continuous with the slit base 61 . The slit base 61 of the second slit 60 is formed on a back surface portion BP of the upper surface portion 11a and a lower surface portion 11b provided with the first slit 50. Further, the extension slit 62 of the second slit 60 is formed on the second side surface portion 14 continuously with the slit base portion 61.

FIG. 6 is a developed view showing a packaging bag according to a second embodiment of the embodiment of the present invention. In the second embodiment shown in FIG. 6, the second slit 60 has only the slit base 61. That is, the packaging bag 100 of the second embodiment is not provided with the extension slit 62 of the second slit 60 as compared with the first embodiment shown in FIG.

Further, FIG. 7 is a developed view showing a packaging bag according to a third embodiment of the embodiment of the present invention. In the third embodiment shown in FIG. 7, only the first slit 50 is provided. That is, the packaging bag 100 of the third embodiment is not provided with the second slit 60 as compared with the first embodiment shown in FIG.

Further, FIG. 8 is a perspective view showing a modified example of the first embodiment of the embodiment of the present invention. In the modified example of the first embodiment shown in FIG. 8, two finger hook portions 30 are formed on the handle portion 20. In the first embodiment, one finger hook portion 30 is formed on the handle portion 20, whereas in the modified example of the first embodiment, there is a predetermined interval in the longitudinal direction (X direction) of the handle portion. Two finger hooks 30 and 30 are arranged apart from each other.

9 to 13 are views for explaining an example of the usage mode of the packaging bag according to the embodiment of the present invention. Here, the effects of this embodiment will be described with reference to FIGS. 9 to 13. Regarding the packaging bag 100 according to the present embodiment described above, first, as shown in FIGS. 9 and 10, the lower surface portion 11b on which the first slit 50 is formed is exposed to the outside of the main body portion 10, and the first slit 50 is formed. After opening, the opened lower surface portion 11b is pulled in the longitudinal direction (X direction) of the hand portion 20. Then, the lower surface portion 11b of the top surface portion 11 is torn from the center portion of the top surface portion 11.

When the lower surface portion 11b is opened and pulled in the longitudinal direction (X direction) of the handle portion 20, the first slit 50 may be directly broken by the finger P, and the opening portion of the lower surface portion 11b may be pinched and pulled. Further, before breaking the first slit 50, the lower surface portion 11b may be pinched by the fingers P and pulled in the longitudinal direction (X direction) of the handle portion 20.

Further, as shown in FIG. 10, a part of the torn lower surface portion 11b is further pulled out to the outside of the main body portion 10. Then, the back surface portion BP of the upper surface portion 11a connected to the lower surface portion 11b is torn along the lower end edge 22 of the handle portion 20. As a result, in the present embodiment, a part of the top surface portion 11 is opened while leaving the surface portion SP of the top surface portion 11a.

The main body portion 10 tends to be linearly broken in the height direction of the handle portion 20 (the direction in which the upper end edge 21 and the lower end edge 22 face each other when the handle portion 20 is upright, hereinafter referred to as the Z direction). be. This is because the direction (Z direction) in which the top surface portion 11 and the bottom surface portion 12 of the main body portion 10 face each other is the stretching direction of the tubular film TF.

Therefore, as shown in FIG. 11, a part of the top surface portion 11 (a part of the lower surface portion 11b and a part of the back surface portion BP of the upper surface portion 11a) pulled out to the outside of the main body portion 10 is further pulled down. Then, a fragment FG extending from the second side surface portion 14 (a fragment formed by a part of the torn lower surface portion 11b, a part of the back surface portion BP of the upper surface portion 11a, and a part of the second side surface portion 14) is formed. Then, the second side surface portion 14 of the main body portion 10 is neatly opened. As a result, as shown in FIG. 11, a substantially rectangular opening OP is formed from the inside of the top surface portion 11 of the main body portion 10 to a part of the second side surface portion 14.

In the present embodiment, the packaging bag can be opened neatly with such a small force. Therefore, the packaging bag 100 of the first embodiment shown in FIGS. 1 to 8 is excellent in openability.

Further, in the packaging bag 100 of the present embodiment, as described above, the opening OP is formed when the top surface portion 11 and the second side surface portion 14 of the main body portion 10 are partially opened. Therefore, as shown in FIG. 12, the packaged body T housed in the packaging bag 100 can be taken out from the opening OP, and the packaged body T housed in the packaging bag 100 can be easily taken out. Therefore, the packaging bag 100 of the first embodiment shown in FIGS. 1 to 8 is excellent in product take-out property.

Further, in the packaging bag 100 of the present embodiment, as described above, a part of the top surface portion 11 of the main body portion 10 and a part of the second side surface portion 14 are neatly opened, so that the broken fragment FG of the packaging bag 100 is also formed. It becomes a beautiful shape. Therefore, as shown in FIG. 13, after a part of the object to be packaged T is taken out from the packaging bag 100, the fragment FG is put (returned) into the inside of the packaging bag 100. As a result, the packaged body T remaining in the packaging bag 100 can be covered with the fragment FG, so that the packaged body T can be protected from dust even after opening. Therefore, the packaging bag 100 of the first embodiment shown in FIGS. 1 to 8 is excellent in storability after opening.

Further, in the packaging bag 100 of the present embodiment, when the packaging bag 100 is opened, the top surface portion 11 of the main body portion 10 has a lower surface portion 11b and a part of the upper surface portion 11a (the back surface portion of the upper surface portion 11a connected to the lower surface portion 11b). Only the article) was torn, and the remaining part of the top surface portion 11 (the portion connecting the handle portion 20 and the pair of first side surface portions 13 of the main body portion 10 or the surface portion SB of the upper surface portion 11a) remained without being torn. Will remain. Therefore, even after the packaging bag 100 is opened, the unused packaged body T can be carried by grasping the handle portion 20 while being stored in the packaging bag 100. Therefore, the packaging bag 100 of the first embodiment shown in FIGS. 1 to 8 is excellent in portability even after opening.

Further, in the present embodiment, since the packaging bag 100 can be opened neatly as described above, the appearance of the packaging bag 100 is not impaired even after opening (see FIGS. 10 to 13). Therefore, the packaging bag 100 of the first embodiment shown in FIGS. 1 to 8 looks good even after opening.

In the present embodiment, as described above, the first slit 50 is formed on the lower surface portion 11b so as to extend in the thickness direction (Z direction) of the handle portion 20. Therefore, as shown in FIGS. 9 and 10, when the lower surface portion 11b is pinched by the finger P and pulled in the longitudinal direction (X direction) of the handle portion 20, the lower surface portion 11b of the top surface portion 11 becomes the central portion of the top surface portion 11. Easy to tear from the side.

Further, in the present embodiment, the direction in which the lower surface portion 11b is broken in the first slit 50 is directed toward the lower end edge 22 of the handle portion 20. Therefore, as shown in FIGS. 10 and 11, when a part of the torn lower surface portion 11b is pulled out to the outside of the main body portion 10, the back surface portion BP of the upper surface portion 11a connected to the lower surface portion 11b is the handle portion 20. It is easy to tear along the lower end edge 22 of. Therefore, the packaging bag 100 of the first embodiment shown in FIGS. 1 to 8 can be opened with less force.

Further, in the present embodiment, when the first slit 50 is formed on both lower surface portions 11b of the pair of lower surface portions 11b, the packaging bag 100 can be opened from any of the pair of lower surface portions 11b. Therefore, in this way, the degree of freedom in the opening operation of the packaging bag 100 can be increased.

Further, in the first embodiment, in addition to the first slit 50 formed in the lower surface portion 11b, the handle portion 20 of the back surface portion BP of the upper surface portion 11a connected to the lower surface portion 11b in which the first slit 50 is formed. A second slit is formed near the side edge 24 of the above (see FIGS. 1 to 6 and 8). As a result, when a part of the top surface portion 11 pulled out to the outside of the main body portion 10 is further pulled down, the back surface portion BP of the upper surface portion 11a torn along the lower end edge 22 of the handle portion 20 is further pulled down. 2 It tears along the slit 60. Therefore, in the packaging bag 100 of the present embodiment shown in FIGS. 1 to 6 and 8, a part of the top surface portion 11 of the main body portion 10 can be opened cleanly.

Further, in the present embodiment, the second slit 60 (slit base 61) extending from the lower end edge 22 side of the handle portion 20 toward the upper end edge side of the main body portion 10 (upper end edge 13a of the pair of first side surface portions 13) is provided. It is provided on the back surface portion BP of the upper surface portion 11a (see FIGS. 1 to 6 and 8). Therefore, the back surface portion BP of the upper surface portion 11a torn along the lower end edge 22 of the handle portion 20 is likely to be continuously torn along the second slit 60 (slit base 61) to the first side surface portion 13 of the main body portion 10. Become. Therefore, in the packaging bag 100 of the present embodiment shown in FIGS. 1 to 6 and 8, a part of the top surface portion 11 of the main body portion 10 can be opened more cleanly with less force.

Further, in the first embodiment, the second slit 60 further has an extension slit 62 extending from the top surface portion 11 side of the main body portion 10 toward the bottom surface portion 12 side of the main body portion (see FIGS. 1 to 5 and 8). ). As a result, when a part of the top surface portion 11 pulled out to the outside of the main body portion 10 is further pulled down, the second side surface portion 14 of the main body portion 10 is torn along the extension slit 62. Therefore, in the packaging bag 100 of the first embodiment shown in FIGS. 1 to 6 and 8, the second side surface portion 14 of the main body portion 10 can be opened more neatly.

Further, although the number of finger hook portions 30 formed on the handle portion 20 differs between the first embodiment shown in FIGS. 1 to 5 and the modified example of the first embodiment shown in FIG. 8, the handle portion 20 is formed. Regardless of whether the number of finger hooks 30 is one or two, both have the same durability. Therefore, even when the handle portion is made into a shape that makes it easy to hold by making one finger hook portion of the handle portion, excellent openability, take-out property, and storability can be exhibited without lowering the durability. ..

<How to use the packaging bag>
Next, a method of using the packaging bag according to the embodiment of the present invention will be described. FIG. 14 is a flowchart showing an example of how to use the packaging bag according to the embodiment of the present invention. In the method of using the packaging bag according to the embodiment, the above-mentioned packaging bag 100 can be used. Here, as a method of using the packaging bag according to the present embodiment, a method of using the packaging bag using the above-mentioned packaging bag 100 will be described.

In the method of using the packaging bag of the present embodiment, first, as shown in FIG. 9, the portion of the lower surface portion 11b of the top surface portion 11 where the first slit 50 is formed is broken (step ST1). Next, as shown in FIG. 10, a part of the lower surface portion 11b (partially broken lower surface portion 11b) is pulled out of the main body portion 10 along the longitudinal direction (X direction) of the hand portion 20 (step). ST2). Then, the lower surface portion 11b of the top surface portion 11 is torn from the center portion of the top surface portion 11 (the portion where the first slit 50 of the lower surface portion 11b is formed), and the back surface portion BP of the upper surface portion 11a connected to the lower surface portion 11b. Is torn along the lower edge 22 of the handle portion 20 (see FIG. 10).

As a result, a part of the top surface portion 11 can be opened while leaving the surface portion SP of the top surface portion 11a. As described above, according to the method of using the packaging bag of the present embodiment, the same effect as that of the packaging bag 100 can be obtained. That is, according to the method of using the packaging bag of the present embodiment, a packaging bag having excellent openability can be obtained.

Further, in the method of using the packaging bag according to the present embodiment, a part of the pinched lower surface portion 11b is further pulled down to the bottom surface portion 12 side of the main body portion 10 (step ST3). As described above, in a structure such as the packaging bag 100, the main body portion 10 tends to be linearly broken in the height direction (Z direction) of the handle portion 20. Therefore, in step ST3, when a part of the top surface portion 11 (a part of the lower surface portion 11b and a part of the back surface portion BP of the upper surface portion 11a) pulled out to the outside of the main body portion 10 is pulled down, the main body portion 10 is further pulled down. The second side surface portion 14 is torn.

As a result, the second side surface portion 14 of the main body portion 10 is neatly opened, and the opening OP is neatly formed in the main body portion 10 (see FIG. 11). At the same time, a fragment FG extending from the second side surface portion 14 (a fragment formed by a part of the torn lower surface portion 11b, a part of the back surface portion BP of the upper surface portion 11a, and a part of the second side surface portion 14) is formed. To. The shape of the fragment FG corresponds to the shape of the opening OP formed in the main body 10.

Therefore, when the packaged body T (roll-shaped toilet paper) is taken out from the main body 10 in step ST4, the packaged body T can be easily taken out (see FIG. 12). In addition, the fragment FG extending from the second side surface portion 14 also has a neat shape. Therefore, in the method of using the packaging bag of the present embodiment, the same effect as the above-mentioned packaging bag 100 can be obtained. That is, according to the method of using the packaging bag of the present embodiment, a packaging bag having excellent openability and product take-out property and having a good appearance even after opening can be obtained.

Further, in the method of using the packaging bag of the present embodiment, when the packaging bag 100 is opened, the top surface portion 11 of the main body portion 10 has a lower surface portion 11b and a part of the upper surface portion 11a (the back surface portion 11a connected to the lower surface portion 11b). Only the portion BP) is torn, and the remaining portion of the top surface portion 11 (the portion connecting the handle portion 20 and the pair of first side surface portions 13 of the main body portion 10 or the surface portion SP of the upper surface portion 11a) remains unbroken. It remains (see FIGS. 11 and 12).

As a result, even after the packaging bag 100 is opened, the unused product (the object to be packaged T) can be grasped and carried by the handle portion 20 while being stored in the packaging bag 100. Therefore, in the method of using the packaging bag of the present embodiment, the same effect as that of the packaging bag 100 can be obtained from the viewpoint of carrying the packaging bag after opening. That is, according to the method of using the packaging bag of the present embodiment, a packaging bag having excellent portability can be obtained even after opening.

Further, in the method of using the packaging bag according to the present embodiment, the fragment FG extending from the second side surface portion 14 is further inserted inside the main body portion 10 (step ST5). That is, the fragment FG formed on the second side surface portion 14 after opening the packaging bag 100 is stored inside the packaging bag 100 from the opening opening OP.

In the method of using the packaging bag of the present embodiment, the fragment FG formed after opening the packaging bag 100 is placed inside the main body 10, and the fragment FG is used to remove a part of the packaged body T. The remaining packaged body T housed in the packaging bag 100 can be covered. Thereby, in the method of using the packaging bag of the present embodiment, the packaging bag 100 can protect the packaged body T from dust even after opening by utilizing the fragment FG formed after opening the package. Therefore, in the method of using the packaging bag of the present embodiment, the same effect as that of the packaging bag 100 can be obtained from the viewpoint of storing the product after opening the packaging bag. That is, according to the method of using the packaging bag of the present embodiment, it is possible to provide a packaging bag having excellent storability after opening.

<Manufacturing method of packaging bag>
Next, a method for manufacturing a packaging bag according to an embodiment of the present invention will be described. FIG. 15 is a flowchart showing an example of a method for manufacturing a packaging bag (first embodiment) according to the present embodiment. FIG. 16 is a diagram showing one step of manufacturing a packaging bag (first embodiment) in the packaging bag manufacturing method according to the present embodiment. FIG. 17 is a diagram showing an example of a semi-finished product obtained in the manufacturing process shown in FIG. In FIG. 17, the portions that can be the first folding portion GF1 and the second folding portion GF2 are shown by a alternate long and short dash line.

The method for manufacturing a packaging bag according to the present embodiment is the method for manufacturing the packaging bag 100 according to the first embodiment described above, and is an example of the method for manufacturing a packaging bag according to the present invention. As shown in FIG. 15, the method for manufacturing a packaging bag according to the present embodiment includes a raw film carrying-out step (step ST11), a tubular film forming step (step ST12), a slit forming step (step ST13), and a gusset forming step. It has (step ST14), a sealing step (step ST15), and a gusset sheet winding step (step ST16).

In the raw fabric film carrying-out step (step ST11), as shown in FIG. 16, the raw fabric film RF, which is the material of the packaging bag 100, is carried out into the manufacturing process 200 of the packaging bag 100. Specifically, the carry-out unit 110 carries out the raw film RF from the carry-out roll 111 on which the raw film RF is wound in the transport direction MD.

In the tubular film forming step (step ST12), as shown in FIG. 16, the carried-out raw film RF is made into a cylindrical shape to form a tubular film TF. Specifically, at the tubular film forming portion 120, the raw film RF is folded in half in a direction (width direction) substantially orthogonal to the transport direction MD, and both ends of the raw film RF are attached by heat sealing (side). Perform seal SS).

In the slit forming step (step ST13), the first slit 50 is formed in the packaging bag 100 near the center of at least one of the top surface portions 11 of the pair of lower surface portions 11b.
Specifically, as shown in FIG. 16, a slit is formed in the tubular film TF at the slit forming portion 130. The slit formed by the slit forming portion 130 constitutes the first slit 50 and the second slit 60 in the packaging bag 100. In the slit forming portion 130, only the first slit 50 can be formed, and the first slit 50 and the second slit 60 can be formed at the same time.

In the gusset forming step (step ST14), the tubular film TF is folded into a gusset shape to form a gusset-shaped sheet (gusset sheet) GS. Specifically, the cylindrical film TF in which the slit is formed is folded into a gusset shape at the gusset forming portion 140 from both end edges of the tubular film TF in the width direction through the folding plate 141. In the formed gusset sheet GS, a pair of first folding portions GF1 are formed at both ends in the width direction, and a pair of second folding portions GF2 are formed inside.

In the sealing step (step ST15), as shown in FIG. 16, the gusset sheet GS folded into a gusset shape is sealed by heat sealing. Specifically, in the slit forming portion 130, a sealing portion 40 that separates the main body portion 10 and the handle portion 20 of the packaging bag 100 is formed on the gusset sheet GS.

In this sealing step (step ST15), a slit for the finger hook portion 30 can be formed together with the formation of the sealing portion 40. Further, in the sealing step, when a reinforcing film (not shown) is provided, the reinforcing film is sealed to the hand portion 20 with the reinforcing film applied to the hand portion 20, and then the reinforcing film is used from above the reinforcing film for the finger hook portion 30. It is preferable to form a slit.

In the gusset sheet winding step (step ST16), the gusset sheet GS in which the seal portion 40 and the slit for the finger hook portion 30 are formed is wound on the winding roll 161 by the winding portion 160.
The packaging bag 100 can be obtained by cutting the gusset sheet GS wound around the take-up roll 161 at predetermined intervals.

The method for manufacturing the packaging bag according to the present embodiment includes the raw fabric film carry-out step, the tubular film forming step, the slit forming step, the gusset forming step, the sealing step, and the gusset sheet winding step (step) as described above. The process is not limited to the case where ST11 to step ST16) are performed in a series of steps, and each step may be performed individually. For example, when the gusset forming step (step ST14) is completed, the process proceeds to the gusset sheet winding step (step ST16), the gusset sheet GS is wound and temporarily stored, and then the sealing process (step ST15) is performed to proceed to the gusset sheet. The seal portion 40 can be formed on the GS.

In the method for manufacturing a packaging bag according to the present embodiment, the first slit 50 is provided in the packaging bag 100 near the center of at least one of the top surface portions 11 of the pair of lower surface portions 10b by the slit forming step (step ST13) described above. Can be formed. Specifically, as shown in FIGS. 16 and 17, in the semi-finished state of the packaging bag 100, the first slit 50 is provided in a portion of the pair of lower surface portions 10b near the center of the top surface portion 11. Can be formed.

Therefore, according to the method for manufacturing a packaging bag according to the present embodiment, the same effect as that of the packaging bag 100 described above can be obtained. That is, according to the method for manufacturing a packaging bag according to the present embodiment, a packaging bag that is excellent in openability, product take-out property, storeability after opening, and portability after opening, and looks good even after opening can be obtained. ..

Further, in the slit forming step (step ST13), the side edge 23 of the back surface portion BP of the upper surface portion 11a connected to the lower surface portion 11b on which the first slit 50 is formed in the longitudinal direction (X direction) of the handle portion 20. , It is preferable to include a step of forming the second slit 60 closer to 24.

In the method for manufacturing a packaging bag according to the present embodiment, the handle portion of the back surface portion BP of the upper surface portion 11a connected to the lower surface portion 11b on which the first slit 50 is formed by such a slit forming step (step ST13). The second slit 60 can be formed closer to the side edge 23 and / or the side edge 24 of 20. Specifically, as shown in FIGS. 16 and 17, in the state of a semi-finished product of the packaging bag 100, from the back surface portion BP of the upper surface portion 11a of the top surface portion 11 of the main body portion 10 to a part of the second side surface portion 14. The second slit 60 can be formed in the portion.

Therefore, according to the method for manufacturing a packaging bag according to the present embodiment, the same effect as that of the packaging bag 100 described above can be obtained. That is, according to the method for manufacturing a packaging bag according to the present embodiment, a packaging bag 100 that can be neatly opened from the top surface portion 11 to the second side surface portion 14 of the main body portion 10 can be obtained.

In the above-mentioned method for manufacturing a packaging bag, the slit forming step (step ST13) is performed before the gusset forming step (step ST14) (see FIGS. 15 and 16). In the manufacturing method of the present embodiment, the first slit can be reliably formed on the top surface portion by the slit forming step (step ST13) before the gusset forming step (step ST14). Further, even when the slit base portion 61 of the second slit 60 is provided, the slit base portion 61 can be reliably formed on the top surface portion 11 at the same time as the formation of the first slit 50. Further, when the extension slit 62 of the second slit 60 is formed, the extension slit 62 can be reliably formed on the second side surface portion 14 at the same time as the formation of the first slit 50 and the slit base portion 61.

On the other hand, in another example of the method for manufacturing a packaging bag of the present embodiment, as shown in FIGS. 18 to 19, the slit forming step (step ST24) may be performed after the gusset forming step (step ST23). Specifically, the slit forming step (step ST24) as shown in FIG. 15 is not performed between the tubular film forming step (step ST22) and the gusset forming step (step ST23), but the gusset forming step (step ST23). ) And the sealing process (step ST25). The slit forming step (step ST24) is preferably performed at the same time as the step of forming the slit for the finger hook portion 30 in the sealing step (step ST25).

In the packaging bag manufacturing method of the present embodiment, the first slit 50 is formed by providing the slit forming step (step ST24) after the gusset forming step (step ST23), or the first slit and the second slit are simultaneously formed. It is formed. At this time, the first slit 50 is formed with the tubular film TF folded by the gusset forming step (step ST23), or the first slit 50 and the second slit 60 are formed at the same time, so that a dummy slit is formed. It will be formed together.

Such dummy slits are, for example, in the semi-finished product of the packaging bag 100 shown in 20 or in the packaging bag 100 (fourth embodiment) shown in FIGS. 21 to 24, the first dummy slit 70 and the second dummy slit 80 ( It is formed as a dummy slit base 81 and an extension dummy slit 82). The first dummy slit 70 and the second dummy slit 80 correspond to the first slit 50 and the second slit 60, and are formed with the same perforations as the first slit 50. In the fourth embodiment, as shown in FIGS. 20 to 23, the perforations forming the first dummy slit 70 and the second dummy slit 80 are shown by broken lines as in the first slit 50.

The dummy slit is preferably as small as possible from the viewpoint of not contributing to the opening of the packaging bag 100. On the other hand, from the viewpoint of effectively utilizing such a dummy slit, the packaging bag may be opened from the portion where the dummy slit is formed. That is, if the first slit 50 and the second slit 60 in the present embodiment are used as the slits for opening the packaging bag 100, and further, the first dummy slit 70 and the second dummy slit 80 are also used to open the packaging bag. The degree of freedom can be further increased.

Further, the slit forming step (step ST24) performed after such a gusset forming step (step ST23) is at the same time as the step of forming the finger hook slit in the hand portion in the sealing step (step ST25) as described above. It can be carried out. Further, as shown in FIG. 20, the region for forming the slit required for forming the first slit 50 and the second slit 60 is the packaging bag in the example of the packaging bag manufacturing method of the present embodiment shown in FIG. It can be narrower than 100 semi-finished products. Therefore, according to another example of the method for manufacturing the packaging bag shown in FIG. 18, it is not necessary to separately provide the steps of forming only the first slit and the second slit.

Further, as shown in FIG. 20, the number of slits required to form the first slit 50 and the second slit 60 can be reduced. Therefore, according to another example of the method for manufacturing the packaging bag shown in FIG. 18, the work of forming the first slit and the second slit is easy. As described above, according to another example of the method for manufacturing the packaging bag shown in FIG. 18, the manufacturing cost can be suppressed.

Hereinafter, the present invention will be specifically described with reference to Examples. The evaluation of Examples and Comparative Examples was carried out by the following tests.

[durability]
As the packaged body T, a packaging bag 100 containing 12 rolls of toilet paper (“Eliere Toilet Tissue 60m Single (147g / roll)” manufactured by Daio Paper Corporation) was prepared. The durability when the user freely hangs the finger P on the finger hook portion 30 of the packaging bag 100 to hold the handle portion 20 and moves it back and forth 10 times like a pendulum within a range of 180 ° was evaluated. The test was performed 5 times for each example and comparative example, and evaluated according to the following criteria.
◯: No damage was confirmed even once out of 5 times (good)
×: Damage confirmed at least once out of 5 times (defective)

[Openability (tensile strength)]
The ease of opening (openability) when opening the packaging bag 100 was evaluated. The openability was evaluated from the tensile strength (kgf) measured as follows. In the measurement of tensile strength, a push-pull gauge (“DSP-20” manufactured by IMADA) was first attached to a tensile tester (“MX-500N” manufactured by IMADA). Further, a clip (film chuck (FC21) manufactured by IMADA) was attached to the push-pull gauge and the chuck mounting plate. Fix the width between the push-pull gauge and the clip attached to the chuck mounting plate to about 30 mm. Clips were attached to the top and bottom of the test piece so that a slit (perforation) was placed in the center between the clips. Then, a clip was pulled in the stretching direction of the film until an opening capable of taking out one toilet roll was formed at a speed of 100 mm / min, and the strength (peak) was measured. The tensile strength was measured three times, and the average value (kgf) was calculated as the tensile strength. It should be noted that, as in Comparative Examples 3 and 4, the one that is pulled in two directions, vertical and horizontal, to be opened requires a force to open the film in a direction orthogonal to the stretching direction rather than the stretching direction of the film, and is therefore orthogonal to the stretching direction. The tensile strength when the perforations were opened was measured in the direction of opening.

[Openability]
The ease of opening (openability) when opening the packaging bag 100 was evaluated. The openability was evaluated by scoring the results of tests conducted by 5 users for each Example / Comparative Example and using the average value as follows. It was evaluated as good when the average value was 4.0 or more.
5 points: Very easy to open 4 points: Easy to open 3 points: Neither can be said 2 points: Difficult to open 1 point: Very difficult to open

[Removability]
The ease of taking out (removability) when one roll of the object to be packaged T in the packaging bag 100 was taken out after opening the packaging bag 100 was evaluated. The take-out property was evaluated by scoring the results of tests conducted by 5 users for each Example / Comparative Example and using the average value as follows. It was evaluated as good when the average value was 4.0 or more.
5 points: Very easy to take out 4 points: Easy to take out 3 points: Neither can be said 2 points: Difficult to take out 1 point: Very difficult to take out

[Storability]
After taking out 3 rolls of the packaged body T in the opened packaging bag 100, whether or not the packaged body T remaining in the packaging bag 100 can be covered (or wrapped) with the broken pieces in the packaging bag 100. , The storability after opening was evaluated (see FIG. 13). The test was conducted 5 times for each Example / Comparative Example and evaluated according to the following criteria.
◯: I was able to wrap up 5 times out of 5 times (good)
×: Could not be wrapped at least once out of 5 times (defective)

[Example 1]
The packaging bag 100 of the first embodiment shown in FIGS. 1 to 5 was prepared. In this packaging bag 100, a first slit 50 is formed on the lower surface portion 11b of the top surface portion 11, a second slit 60 (slit base 61) is formed on the back surface portion BP of the upper surface portion 11a, and a second slit 60 is formed on the second side surface portion 14. Two slits 60 (extension slits 62) were formed. Further, the finger hook portion 30 of the handle portion 20 is formed by one slit. The packaging bag 100 was evaluated for durability, openability, take-out property, and storability. The results are shown in Table 1.

[Example 2]
The packaging bag 100 of the second embodiment shown in FIG. 6 was prepared. In this packaging bag 100, the packaging bag 100 was produced and evaluated in the same manner as in Example 1 except that the second slit 60 (extension slit 62) was not formed on the second side surface portion 14. The results are shown in Table 1.

[Example 3]
The packaging bag 100 of the second embodiment shown in FIG. 6 was prepared. In this packaging bag 100, the packaging bag 100 was produced and evaluated in the same manner as in Example 2 except that the second slit 60 (slit base 61) was not formed on the back surface portion BP of the upper surface portion 11a. The results are shown in Table 1.

[Example 4]
A packaging bag 100 of a modified example of the first embodiment shown in FIG. 8 was prepared. In this packaging bag 100, the packaging bag 100 was produced and evaluated in the same manner as in Example 1 except that the finger hook portion 30 of the handle portion 20 was formed by two slits. The results are shown in Table 1.

[Example 5]
The fourth embodiment shown in FIGS. 21 to 24 was prepared. In this packaging bag 100, a first dummy slit 70 and a second dummy slit 80 (dummy slit base 81) are formed on the upper surface portion 11a of the top surface portion 11, and a second dummy slit 80 (extended dummy slit 80) is formed on the first side surface portion 13. A packaging bag 100 was prepared and evaluated in the same manner as in Example 1 except that 82) was formed. The results are shown in Table 1.

[Example 6]
A modified example (not shown) of the fourth embodiment was prepared. A packaging bag 100 was produced and evaluated in the same manner as in Example 5, except that the finger hook portion 30 of the handle portion 20 was formed by two slits. The results are shown in Table 1.

[Comparative Example 1]
As shown in FIG. 25, the finger hook portion 30 of the handle portion 20 is formed by two slits, and the opening slit 90 (perforation shown by the broken line in FIG. 25) is used instead of the first slit 50 and the second slit 60. The packaging bag 100 was produced and evaluated in the same manner as in Example 1 except that the handle portion 20 was formed between the two finger hook portions 30. The results are shown in Table 1.

[Comparative Example 2]
As shown in FIG. 26, except that the opening slit 90 is formed between the finger hook portion 30 and the lower end edge 22 of the handle portion 20 instead of the first slit 50 and the second slit 60. Similarly, the packaging bag 100 was prepared and evaluated. The results are shown in Table 1.

[Comparative Example 3]
As shown in FIG. 27, the finger hook portion 30 of the handle portion 20 is formed by two slits, and instead of the first slit 50 and the second slit 60, a T-shaped opening slit 90 (horizontal slit 91 and vertical slit 91) is formed. A packaging bag 100 was produced and evaluated in the same manner as in Example 1 except that the slit 92) was formed on the first side surface portion 13 of the main body portion. The results are shown in Table 1.

[Comparative Example 4]
As shown in FIG. 28, the finger hook portion 30 of the handle portion 20 is formed by two slits, and the opening slit 90 (top slit 91 and side slit 92) is used instead of the first slit 50 and the second slit 60. Was formed on the top surface portion 11, the first side surface portion 13, and the second side surface portion 14 of the main body portion, and the packaging bag 100 was produced and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[Comparative Example 5]
As shown in FIG. 29, the finger hook portion 30 of the handle portion 20 is formed by two slits, and the opening slit 90 (front slit 91 and side slit 92) is provided in place of the first slit 50 and the second slit 60. The packaging bag 100 was produced and evaluated in the same manner as in Example 1 except that it was formed on the top surface portion 11, the first side surface portion 13, and the second side surface portion 14 of the main body portion. The results are shown in Table 1.

From Table 1, all of the packaging bags 100 provided with the first slit 50 on the lower surface portion 11b of the top surface portion 11 have good durability, tensile strength of less than 1.50 kgf, and openability. It was 0 or more, the take-out property was 4.0 or more, and the storage property was good (Examples 1 to 6).

On the other hand, in the packaging bag 100 not provided with the first slit 50, one of them has poor durability, a tensile strength of 1.50 kgf or more, and an openability of less than 4.0. The take-out property was less than 4.0, and the storage property was poor (Comparative Examples 1 to 5).

Further, the packaging bag 100 provided with the first slit 50 on the lower surface portion 11b of the top surface portion 11 has one or two slits constituting the finger hook portion 30 of the handle portion 20. Durability, tensile strength, openability, take-out property, and storability were all the same (Examples 1, 4 to 6).

From these results, by forming the first slit near the center of the top surface of at least one of the pair of lower surface portions constituting the top surface portion of the main body portion, the openability, take-out property, and storability are improved. It turned out that an excellent packaging bag can be obtained.

Further, it was found that even when the finger hook portion of the handle portion is formed by one slit (when the handle portion has a shape that makes it easy to hold), the packaging bag is not easily torn before opening.

Although the embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments, and various modifications and changes can be made within the scope of the invention described in the claims. ..

100 Packaging bag T Packaged body (toilet paper)
10 Main body 11 Top surface 11a Top surface SP Front surface BP Back surface 11b Bottom surface 11c Connection part GF1 First folding part GF2 Second folding part GF3 Third folding part 12 Bottom part 13 First side surface part 13a Top edge 14 Second Side surface 14a Upper edge 20 Handle 21 Upper edge 22 Lower edge 23 Side edge 24 Side edge 25 Flat surface 30 Finger hook 40 Seal 50 1st slit 60 2nd slit 61 Slit base 62 Extension slit FG broken fragment 70 1st dummy slit 80 2nd dummy slit 81 Dummy slit base 82 Extension dummy slit 90 Opening slit 110 Carry-out part 111 Carry-out roll 120 Cylindrical film forming part 130 Slit forming part 140 Gasset forming part 141 Folded plate 150 Seal forming part 160 Take-up part 161 Take-up roll RF Original film TF Cylindrical film SS Side seal GS Gusset sheet MD Transport direction P Hands

Claims (11)

The main body, which is formed in a gusset shape with a tubular film and houses the packaged body,
The top surface portion of the main body portion has a handle portion provided integrally with the main body portion.
The top surface portion of the main body portion is a pair of upper surface portions whose front surface portion is connected to the lower end edge of the handle portion, and a pair of lower surface portions which are connected to the back surface portion of the upper surface portion and overlap below the upper surface portion. And have
A first slit is formed near the center of the top surface portion of at least one of the lower surface portions of the pair of lower surface portions .
A second slit is formed discontinuously with the first slit near the side edge of the handle portion of the back surface portion of the upper surface portion connected to the lower surface portion on which the first slit is formed. ,
A packaging bag, characterized in that a slit along the lower end edge of the handle portion is not formed . The packaging bag according to claim 1, wherein the first slit extends in the thickness direction of the handle portion. The packaging bag according to claim 1 or 2, wherein the first slit is formed on any lower surface portion of the pair of lower surface portions . The packaging bag according to any one of claims 1 to 3 , wherein the second slit extends from the lower end edge side of the handle portion toward the upper end edge side of the main body portion. The packaging bag according to claim 4 , wherein the second slit further has an extension slit extending from the top surface side of the main body portion toward the bottom surface portion side of the main body portion. The method of using the packaging bag according to any one of claims 1 to 5 .
The portion of the lower surface where the first slit is formed is broken, and the portion is broken.
A method of using a packaging bag, which comprises pulling out the lower surface portion, which is partially broken, to the outside of the main body portion along the longitudinal direction of the handle portion. The method of using the packaging bag according to claim 6 , wherein a part of the lower surface portion is further pulled down toward the bottom surface portion of the main body portion. The method of using the packaging bag according to claim 6 or 7 , wherein a part of the lower surface portion is further inserted inside the main body portion. It has a main body portion formed in a gusset shape by a tubular film and accommodating an object to be packaged, and a handle portion provided integrally with the main body portion on the top surface portion of the main body portion. The top surface portion is a packaging bag having a pair of upper surface portions connected to the lower end edge of the handle portion and a pair of lower surface portions connected to the back surface portion of the upper surface portion and overlapped below the upper surface portion. It is a manufacturing method of
A gusset forming step of folding the tubular film into a gusset shape to form a gusset-shaped sheet,
It has a slit forming step of forming a first slit near the center of at least one of the top surface portions of the pair of lower surface portions.
In the slit forming step, the second slit is not the same as the first slit in the back surface portion of the upper surface portion connected to the lower surface portion in which the first slit is formed, near the side edge of the handle portion. Including the step of forming continuously
In the slit forming step, a method for manufacturing a packaging bag that does not form a slit along the lower end edge of the handle portion . The method for manufacturing a packaging bag according to claim 9 , wherein the slit forming step is performed before the gusset forming step. The method for manufacturing a packaging bag according to claim 9 , wherein the slit forming step is performed after the gusset forming step.

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