JP6040798B2 - Packaging bags for disposable diapers, etc. and method for producing the same - Google Patents

Description

  The present invention relates to, for example, a packaging bag that can store a plurality of compressed disposable diapers and a method for manufacturing the same. More specifically, the present invention relates to a packaging bag having an opening perforation for opening a bag when a disposable diaper or the like is taken out, and a method for manufacturing the same.

  In general, sanitary goods such as disposable diapers are stored in a packaging bag in a compressed and aligned state, and are transported or sold together with the packaging bag. Packaging bags containing such disposable diapers are sealed and kept hygienic in order to prevent foreign matter such as dust and dirt from entering them during transportation and sales. ing. For this reason, in order to use a disposable diaper etc., it is necessary to open a packaging bag, to form an opening part, and to take out a disposable diaper from this opening part.

  Therefore, conventionally, a technique has been proposed in which a perforation for opening is provided in a packaging bag such as a disposable diaper for easy opening of the bag (for example, Patent Document 1 and Patent Document 2).

  For example, the packaging bag described in Patent Document 1 is formed by forming a cutting line for opening in the vertical direction on the front surface or the rear surface. That is, the packaging bag described in Patent Document 1 has the surface having the handle of the packaging bag as the upper surface, the surfaces parallel to the compression direction of the disposable diaper as the front surface and the rear surface, and the bottom portion packed and sealed with the disposable diaper as the lower surface. Yes. And the packaging bag of patent document 1 consists of a perforation which has a starting point in the position of the uppermost row of a row of disposable diapers, and an end point in the position of the lowermost row in the front or back. It is characterized in that a cutting line for opening is provided in the vertical direction.

  Further, for example, the packaging bag described in Patent Document 2 has a perforation for opening on its top surface. That is, the packaging bag described in Patent Document 2 includes a top surface, a bottom surface, and an outer peripheral side surface, and an internal space in which sanitary articles can be accommodated is formed by these surfaces. And the packaging bag of patent document 2 is formed with an annular first perforated portion that can form an opening by separating at least a part of the top surface at the outer peripheral edge of the top surface, In the vicinity of the first perforated portion, a knob that pulls the top surface or a display portion that can recognize the first perforated portion is provided or formed.

Japanese Utility Model Publication No. 6-57873 JP 2010-184714 A

  By the way, as in the above prior art, some packaging bags for storing disposable diapers and the like have an opening perforation formed on the front or rear surface thereof, and if the opening perforation is formed on the top surface thereof. Some have eyes formed. For example, a packaging bag with a perforation on the front or rear surface can be easily broken by using the repulsive force of a disposable diaper that is compressed and stored inside, or has a relatively large opening. Therefore, there is a merit that it is easy to take out disposable diapers. On the other hand, packaging bags with perforations on the top surface can be used to remove the disposable diapers stored inside from the top one, and the top surface can be closed again after the disposable diaper is removed. There is an advantage that the sanitary condition in the bag can be maintained.

  However, as described above, packaging bags with opening perforations formed on the front or rear surface and packaging bags with opening perforations formed on the top surface are currently sold together. Therefore, when a consumer such as a disposable diaper purchases a new product packed in a packaging bag and starts using it, the user has to find the position of the opening perforation. For example, a consumer who has usually purchased a disposable diaper packed in a packaging bag with a perforation on the top surface and is accustomed to having a perforation on the top surface, has newly added a perforation on the front or rear surface. When we started to purchase disposable diapers packed in packaging bags we had, there was a problem that the top surface or the rear surface was not noticed and the top surface was broken to form an opening. . In this way, if the consumer forms an opening on the top surface that is not perforated despite the formation of perforations on the front or rear surface, the packaging bag can be opened successfully. Various problems may occur, such as failure to open the packaging bag, extra force required to open the packaging bag, and damage to the entire packaging bag, making it impossible to maintain the sanitary condition of the internal disposable diaper. was there.

  Here, in order to overcome the above-mentioned problems, a perforation for opening is formed in every part including the front surface, the rear surface, and the top surface of the packaging bag, and the customer who purchased the product opens the packaging bag. It is also conceivable that the position of the perforation is not lost. However, if perforations are to be formed at various locations on the packaging bag, the number of perforations in the production of the packaging bag increases the number of processes for forming perforations on the packaging bag. There is a problem that the manufacturing cost of the packaging bag increases, for example, it takes time to manufacture and it is necessary to add a new device to the manufacturing line. Originally, a packaging bag is merely an accessory such as a disposable diaper, which is a consumer's object, and if the cost of the product itself is improved by multiplying the manufacturing cost of such a packaging bag, it will be overturned. For this reason, it should be avoided to introduce a process with high manufacturing cost, such as forming a plurality of perforations in a packaging bag over a plurality of processes.

  Therefore, at present, there is a demand for a technique for manufacturing a packaging bag that does not cause the uncertain opening position of any person through an efficient process.

Therefore, as a result of intensive investigations on means for solving the problems of the conventional invention, the inventor of the present invention finds that the top surface is located between the front surface and the rear surface when the perforation for opening is formed on the packaging bag. In such a folded state, the perforation is formed through the overlapping region where these surfaces overlap, and the perforation is formed simultaneously on at least one of the front or rear surface and the top surface, thereby reducing the cost. We obtained the knowledge that perforations for opening can be formed at multiple locations on a packaging bag with an efficient process that does not require application. In addition, by forming perforations at multiple locations on the packaging bag according to this process, for example, consumers who are used to having perforations on the top surface should have perforations on the front or rear surface. Even consumers accustomed to can easily open the packaging bag without losing the position of the perforation. The inventor has conceived that the problems of the prior art can be solved based on the above knowledge, and has completed the present invention.
More specifically, the present invention has the following configuration.

The 1st side surface of this invention is related with the manufacturing method of the packaging bag in which the perforation for opening was formed.
Here, the packaging bag has a front surface 10, a rear surface 20, a top surface 30, and a bottom surface 40.
The front surface 10 and the rear surface 20 are joined to each other at both ends in the width direction.
The top surface 30 is located at the upper part of the front surface 10 and the rear surface 20 in the height direction, and is sandwiched between the front surface 10 and the rear surface 20 in a state of being folded inward along a valley fold line 31 extending in the width direction.
The bottom surface 40 is formed by closing the opening located at the lower part of the front surface 10 and the rear surface 20 in the height direction.
In the manufacturing method of the present invention, the top surface 30 is folded inward, and the front surface 10 and the front side portion 32 of the top surface 30 (the portion of the top surface 30 located on the front surface 10 side with respect to the valley fold line 31), In the state where the rear side portion 33 of the top surface 30 (the portion of the top surface 30 located on the rear surface 20 side with respect to the valley fold line 31) and the rear surface 20 overlap the four layers, the region overlapped with the four layers And forming a perforation 60 for opening in the region including the overlapping region 50 or in the overlapping region 50. As a result, an opening perforation is simultaneously formed on at least one of the front surface 10 and the rear surface 20 of the packaging bag and the top surface 30.

  According to the above process, by forming the opening perforation 60 on the top surface 30 and at least one of the front surface 10 and the rear surface 20 of the packaging bag such as a disposable diaper, for example, the perforation is formed on the top surface. Whether consumers are accustomed to certain things, or consumers accustomed to having perforations on the front or rear, packaging bags that do not get lost in the position of the perforations are efficient without cost. Can be manufactured automatically.

  In the manufacturing method of the present invention, the step of forming the opening perforation 60 includes forming the opening perforation 60 so as to penetrate the front surface 10, the front side portion 32, the rear side portion 33, and the rear surface 20. It is preferable that the opening perforations 60A, 60B, and 60C are simultaneously formed on the front surface 10, the rear surface 20, and the top surface 30, respectively.

  By forming the opening perforation 60 so as to penetrate all of the front surface 10, the front side portion 32, the rear side portion 33, and the rear surface 20, the front side portion 32, the rear side portion 33, and Perforations can be formed simultaneously on all surfaces of the rear surface 20. For this reason, the packaging bag can be easily opened from any part, and the convenience of the packaging bag is improved for the consumer. Further, even when perforations are formed at a plurality of locations in this way, it is possible to maintain an inexpensive manufacturing cost that is the same as the conventional one.

  In the manufacturing method of the present invention, the opening perforation 60 includes a first portion 61 formed in the overlapping region 50 and a second portion formed in a region continuous with the first portion 61 and overlapping only the front surface 10 and the rear surface 20. 62.

  As described above, the opening perforation 60 is formed from the overlapping region 50 to the region where only the front surface 10 and the rear surface 20 overlap, so that the front side portion 32 and the rear side portion 33 of the top surface 30 are aligned with each other. Two continuous opening perforations 60 are formed. Thereby, since an opening part can be formed in one place of the top | upper surface 30, it becomes easy to take out the disposable diaper etc. which were accommodated in the inside of a packaging bag.

  In the manufacturing method of the present invention, the opening perforation 60 has a first portion 61 having a U-shape (inverted U-shape) with the opening facing downward in the height direction, and the second portion 62 having a U-shape. It is good also as two linear form continuously extended in the 1st part 61 of a shape.

  As described above, the opening perforation 60 formed in the region including the overlapping region 50 is formed in an inverted U shape. As a result, an endless (annular) opening perforation 60C is formed on the top surface 30. It is formed. In this way, by forming the reverse U-shaped opening perforations 60A and 60B on the front surface 10 and the rear surface 20 of the packaging bag, and simultaneously forming the endless opening perforation 60C on the top surface, from which surface Even so, it becomes easier to open the packaging bag. In particular, by making the opening perforation 60C provided on the top surface 30 endless, the size of the opening formed by cutting out the opening perforation 60C can be kept constant. Since the size of can be prevented from becoming too large, the sanitary condition in the packaging bag can be maintained to some extent even after the opening is formed.

  In the manufacturing method of the present invention, the opening perforation 60 has an L shape in which the first portion 61 has a linear portion extending along the width direction and a linear portion extending downward in the height direction. The second portion 62 may be a straight line extending continuously from the L-shaped first portion 61.

  As described above, by forming the opening perforation 60 formed in the region including the overlapping region 50 into an inverted L shape, a U-shaped opening perforation 60C is formed on the top surface 30 as a result. Is done. In this way, by forming the reverse L-shaped opening perforations 60A and 60B on the front surface 10 and the rear surface 20 of the packaging bag, and at the same time forming the substantially U-shaped opening perforations 60C on the top surface, It is easy to open the packaging bag from any surface. In particular, the opening formed by cutting the opening perforation 60C while gradually breaking the opening perforation 60C by making the opening perforation 60C provided on the top surface 30 into a substantially U-shape. The size of can be adjusted. Further, even if all of the substantially U-shaped opening perforations 60C are broken, the portion surrounded by the opening perforations 60C remains on the top surface 30, so that the opening perforations 60C are cut off. The opening can be closed again, and even after the opening is formed, the sanitary condition in the packaging bag can be maintained to some extent.

The 2nd side surface of this invention is related with the packaging bag in which the perforation for opening was formed.
The packaging bag of the present invention has a front surface 10, a rear surface 20, a top surface 30, and a bottom surface 40.
The front surface 10 and the rear surface 20 are coupled to each other at both ends in the width direction.
The top surface 30 is located at the upper part of the front surface 10 and the rear surface 20 in the height direction, and is sandwiched between the front surface 10 and the rear surface 20 in a state of being folded inward along a valley fold line 31 extending in the width direction.
The bottom surface 40 is formed by closing the opening located at the lower part of the front surface 10 and the rear surface 20 in the height direction.
In the packaging bag of the present invention, the top surface 30 is folded inward, and the front surface 10 and the front side portion 32 of the top surface 30 (the portion of the top surface 30 located on the front surface 10 side with respect to the valley fold line 31) , A rear side portion 33 of the top surface 30 (a portion of the top surface 30 located on the rear surface 20 side with respect to the valley fold line 31) and the rear surface 20 include an overlapping region 50 that overlaps four layers, or the overlapping In the region 50, opening perforations 60A, 60B, 60C are formed.

  As in the above configuration, the opening perforation 60 is formed in the overlapping region 50 in which the front surface 10, the rear surface 20, and the top surface 30 (the front side portion 32 and the rear side portion 33) of the packaging bag such as a disposable diaper overlap. For example, a consumer who is accustomed to having a perforation on the top surface or a consumer who is accustomed to have a perforation on the front or rear surface, Packaging bags with universal design that do not get lost in position can be provided efficiently without cost.

  According to the present invention, a packaging bag that does not get lost in the opening position can be manufactured by an efficient process that does not cost.

FIG. 1 is an external perspective view showing an example of a packaging bag manufactured by the manufacturing method according to the first embodiment. 2 is a cross-sectional view in the height direction showing an example of a state before the bottom surface of the packaging bag shown in FIG. 1 is closed. FIG. 2 (a) shows a state where the top surface of the packaging bag is spread, and FIG. 2 (b) shows a state where the top surface of the packaging bag is folded. FIG. 3 is a plan view showing an example of a packaging bag manufactured by the manufacturing method according to the first embodiment. FIG. 3 shows the folded packaging bag as seen from the front side. 4 is a perspective cross-sectional view showing a state in which the packaging bag is cut along the line X1-X1 shown in FIG. FIG. 5 is an external perspective view showing an example of a packaging bag manufactured by the manufacturing method according to the second embodiment. FIG. 6 is a perspective sectional view showing a state in which a part of the packaging bag shown in FIG. 5 is cut in the height direction. FIG. 7 is an external perspective view showing an example of a packaging bag manufactured by the manufacturing method according to the third embodiment. FIG. 8 is a perspective sectional view showing a state in which a part of the packaging bag shown in FIG. 7 is cut in the height direction.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, but includes those appropriately modified by those skilled in the art from the following embodiments.
In each figure in the present application, in order to show the three-dimensional structure of the packaging bag in an easy-to-understand manner, orthogonal coordinates of the X axis, the Y axis, and the Z axis are shown. The X axis indicates the width direction of the packaging bag, the Y axis indicates the height direction of the packaging bag, and the Z axis indicates the thickness direction of the packaging bag.
In the present specification, “A to B” means “A to B”.

(1. First embodiment)
FIG. 1 is a perspective view showing a packaging bag 1 manufactured by the manufacturing method according to the first embodiment of the present invention. As shown in FIG. 1, the packaging bag 1 basically has a front surface 10, a rear surface 20, a top surface 30, and a bottom surface 40, and by these surfaces 10, 20, 30, 40, An internal space for storing articles such as disposable diapers is formed. FIG. 2 is a cross-sectional view in the height direction before the bottom surface of the packaging bag shown in FIG. 1 is closed. As shown in FIG. 2, in the present embodiment, the front surface 10, the rear surface 20, the top surface 30, and the bottom surface 40 can be formed from a single rectangular sheet member made of a thermoplastic resin. That is, as shown in FIG. 1 and FIG. 2, when manufacturing the packaging bag 1, first, the central region of the rectangular sheet member is folded into an M shape, the boundary position between the front surface 10 and the rear surface 20, and the front surface 10. And a boundary position between the rear surface 20 and the top surface 30 are joined by a heat seal device or the like to form the packaging bag 1 in which the lower portion of the front surface 10 and the rear surface 20 is an opening. Then, an article such as a disposable diaper is accommodated from the lower opening of the packaging bag, and then the lower portion of the front surface 10 and the rear surface 20 are joined by a heat seal device or the like to form the bottom surface 40, The defined interior space is sealed. Thereby, the packaging bag 1 in which the articles are stored can be obtained. Such a packaging bag 1 can be manufactured according to a well-known manufacturing method using a well-known manufacturing apparatus.

  As shown in FIG. 1, the front surface 10 and the rear surface 20 face each other, and both end portions in the width direction (Y direction) are joined at the first seal portion 11 by, for example, a heat seal device or an ultrasonic seal device. Has been. The first seal portion 11 preferably extends in the height direction (X direction) of the packaging bag and joins the entire width direction end portions of the front surface 10 and the rear surface 20. In this way, the first seal portion 11 that joins the front surface 10 and the rear surface 20 forms a fold at the boundary position between the front surface 10 and the rear surface 20, and is folded through the fold so that the front surface 10 and the rear surface 20 Will overlap. Further, the top surface 30 is located at the upper part of the front surface 10 and the rear surface 20 in the height direction. As shown in FIG. 2, in the present embodiment, the top surface 30 can be formed by a sheet member integrated with the front surface 10 and the rear surface 20. The top surface 30 is formed with a second seal portion 12 extending in the width direction at a boundary portion with the front surface 10 and a boundary portion with the rear surface 20. In the second seal portion 12, the front surface 10 and the top surface 30 and the rear surface 20 and the top surface 30 are joined by, for example, a heat seal device or an ultrasonic seal device. As described above, the first seal portion 11 is formed at both ends in the width direction of the packaging bag 1, and the second seal portion 12 is formed in the vicinity of the upper portion of the packaging bag 1 in the height direction. The boundary of the surface 30 is defined.

  In the present embodiment, the second seal portion 12 is formed at a position shifted downward from the upper edge of the packaging bag 1 by a predetermined distance. For this reason, a double portion 70 in which the inner layer and the outer layer of the sheet member are doubly overlapped is formed in a portion located above the top surface 30 of the front surface 10 and the rear surface 20. Thus, the double portion 70 of the sheet provided above the front surface 10 and the rear surface 20 functions as a portion for attaching the hand holding portion 71 to the packaging bag 1. As shown in FIGS. 1 and 2, a pair of loop-shaped hand-carrying portions 71 can be joined to the double portion 70 formed on the upper portion of each of the front surface 10 and the rear surface 20. The pair of hand-carrying portions 71 are portions that are manually gripped when the packaging bag 1 containing articles such as disposable diapers is conveyed. Further, as shown in FIG. 1, it is preferable that both ends in the width direction of the double portion 70 are joined by the first seal portion 11.

  As shown in FIGS. 1 and 2, the top surface 30 of the packaging bag 1 is formed with a valley fold line 31 extending along the width direction (Y direction) in the central region. As shown in the cross-sectional views of FIGS. 2A and 2B, the top surface 30 can be folded along the valley fold line 31 toward the inside of the packaging bag 1. . The top surface 30 is divided into a front side portion 32 located on the front surface 10 side of the valley fold line 31 and a rear side portion 33 located on the rear surface 20 side of the valley fold line 31 with the valley fold line 31 as a boundary. The As shown in FIG. 2B, by folding the top surface 30, the top surface 30 is sandwiched between the front surface 10 and the rear surface 20. That is, by folding the top surface 30 inward along the valley fold line 31, the front surface 10, the front side portion 32 of the top surface 30, the rear side portion 33 of the top surface 30, and the rear surface 20 are arranged in this order. Are superimposed in the thickness direction (Z direction).

  Moreover, as shown in FIG. 1, the opening perforation 60 is formed in the packaging bag 1 manufactured by the manufacturing method of this invention. Particularly in the present embodiment, opening perforations 60A, 60B, and 60C are formed on the front surface 10, the rear surface 20, and the top surface 30, respectively. The opening perforations 60 </ b> A, 60 </ b> B, 60 </ b> C are provided so that the user can easily break the packaging bag 1 when the user uses the article in the packaging bag 1. As shown in FIG. 1, it is preferable to provide an opening display in the vicinity of the opening perforation. The opening display may be, for example, a letter printed as “OPEN” or “open from here” on the packaging bag 1, or coloring the packaging bag 1 to recognize the opening. It may be a thing.

That is, the manufacturing method of the present invention includes a step of forming a perforation for opening in the packaging bag 1. In the production method of the present invention, the step of forming the opening perforation is performed at a stage before an article such as a disposable diaper is housed therein through an opening located below the packaging bag. More specifically, in the manufacturing method of the packaging bag, the step of forming the opening perforation is performed by folding the central region of the rectangular sheet member into an M shape, the boundary position between the front surface 10 and the rear surface 20, and the front surface. 10 and the boundary position between the top surface 30 and the boundary position between the rear surface 20 and the top surface 30 are joined by a heat seal device or the like, respectively, to form the packaging bag 1 in which the lower portions of the front surface 10 and the rear surface 20 become openings. The top surface 30 is folded inward along the valley fold line 31, and the front surface 10, the front side portion 32 of the top surface 30, the rear side portion 33 of the top surface 30, and the rear surface 20 are It is preferable to carry out in a state where they are stacked in the thickness direction of the packaging bag 1 in order.
Below, the process of forming the perforation for opening in the packaging bag 1 is demonstrated in detail.

  Here, FIG.2 (b) has shown the state of the packaging bag 1 when the process of forming the perforation for opening is performed. As shown in FIG. 2 (b), when the perforation for opening is formed, the top surface 30 of the packaging bag 1 is folded inward along the valley fold line 31. The front side 32, the rear side 33 of the top surface 30, and the rear surface 20 are in a state where four layers are stacked in this order in the thickness direction of the packaging bag 1. In the specification of the present application, a region in which the sheets constituting the front surface 10, the rear surface 20, and the top surface 30 overlap each other in four layers is referred to as a superimposed region 50.

  FIG. 3 is a plan view of the packaging bag 1 showing a state in which the front surface 10, the rear surface 20, and the top surface 30 are overlapped with each other before the article is stored in the packaging bag 1. FIG. In FIG. 3, the state which looked at the packaging bag 1 from the front side is shown. 4 is a perspective sectional view showing a state in which the packaging bag 1 is cut along the line X1-X1 shown in FIG. As shown in FIGS. 3 and 4, in this embodiment, the opening perforation 60 has four sheets in the thickness direction in which the packaging bag 1 is composed of the front surface 10, the rear surface 20, and the top surface 30. When in the closed state, it is formed in a region including this overlapping region 50. As a device for forming the opening perforation 60, a known device can be used, and a device capable of forming a perforation by penetrating a plurality of sheets made of thermoplastic resin may be appropriately employed. In the present embodiment, the opening perforation 60 penetrates all the layers of the front surface 10 forming the overlapping region 50, the front side portion 32 of the top surface 30, the rear side portion 33 of the top surface 30, and the rear surface 20. It is formed.

  However, in the present invention, the opening perforation 60 is not limited to one that penetrates all four layers of the front surface 10, the front side portion 32 of the top surface 30, the rear side portion 33 of the top surface 30, and the rear surface 20. . That is, the opening perforation 60 only needs to be formed through at least two of the four layers. For example, the opening perforation 60 may be formed through two layers of only the front surface 10 and the front side portion 32 or only the rear surface 20 and the rear side portion 33. Further, the opening perforation 60 may be formed through only the front surface 10 and the front side portion 32 and the rear side portion 33 or through the three layers of the rear surface 20, the rear side portion 33 and the front side portion 32. Good. As described above, in order to adjust the number of layers through which the opening perforation 60 penetrates, an iron plate or the like is inserted into the packaging bag 1 to protect the layers that do not want to form the opening perforation 60. Or the thickness at which the apparatus forms perforations on the sheet may be adjusted.

  As shown in FIGS. 3 and 4, in this embodiment, the opening perforation 60 is formed in a region where only the first portion 61 that is a portion formed in the overlapping region 50 and the front surface 10 and the rear surface 20 overlap. The second portion 62 is included. The second portion 62 of the opening perforation 60 is continuously connected to the first portion 61. That is, in the present embodiment, the opening perforation is formed from the overlapping region 50 where the four layers overlap to the region where only the two layers of the front surface 10 and the rear surface 20 overlap.

  Specifically, in the present embodiment, the first portion 61 of the opening perforation 60 is formed in a U shape (so-called inverted U shape) with the opening facing downward in the height direction. Further, the second portion 62 of the opening perforation 60 is formed in two straight lines extending downward in the height direction continuously to the U-shaped first portion 61. Thus, in this embodiment, the opening perforation 60 is formed in a U-shape with the opening facing downward in the height direction as a whole. About the dimension etc. which form the perforation 60 for opening, it can adjust suitably. For example, the first portion 61 of the opening perforation 60 is formed to extend to a position where the U-shaped apex reaches 50% to 90% of the length of the overlapping region 50 in the height direction. Is preferred. The second portion 62 of the opening perforation 60 is preferably formed to extend to a position that reaches 30% to 90% of the length in the height direction of the region where only the front surface 10 and the rear surface 20 overlap. . The distance between the two straight lines forming the second portion 62 of the opening perforation 60 may be, for example, about 10 mm to 50 mm.

  In addition, as in the embodiment shown in FIG. 3, when the opening perforation 60 has a curved portion 60a and a straight portion 60b, the curved portion 60a and the straight portion 60b have the length of each hole forming the perforation. , The intervals between the holes may be different. For example, in the curved portion 60a and the straight portion 60b, the length of each hole forming the perforation is preferably longer in the curved portion 60a and shorter in the straight portion 60b. For example, the length of each hole forming the curved portion 60a is preferably 150% to 300%, or 200% to 250% with respect to the length of each hole forming the linear portion 60b. Specifically, the length of each hole forming the curved portion 60a is 1.5 mm to 4 mm, or 2 mm to 3 mm, and the length of each hole forming the straight portion 60b is 0.5 mm to 2 mm, Or it is preferable that it is 1 mm-1.5 mm. Moreover, it is preferable that the curve part 60a and the linear part 60b are such that the space | interval of each hole which forms a perforation is shorter than the curved part 60a, and the linear part 60b is longer. For example, the interval between the holes forming the curved portion 60a is preferably 10% to 80%, or 30% to 60% with respect to the interval between the holes forming the straight portion 60b. Specifically, the interval between the holes forming the curved portion 60a is 0.5 mm to 3 mm, or 1 mm to 2 mm, and the interval between the holes forming the linear portion 60b is 3 mm to 8 mm, or 4 mm. It is preferably ˜6 mm. In order to adjust the length of each hole forming the perforation and the interval between the holes, the length of each blade in the continuous blade forming the perforation and the interval between the blades may be adjusted. In this way, when opening the packaging bag by increasing the length of each hole forming the curved portion 60a of the opening perforation 60 and shortening the interval between the holes, this curve is first formed. It becomes easy to break the packaging bag along the opening perforation 60 by inserting a finger into the portion 60a.

  As described above, by forming the perforation 60 for opening in the overlapping region 50 where the sheets constituting the front surface 10, the rear surface 20, and the top surface 30 overlap each other, the front surface 10, An opening perforation can be simultaneously formed on each of the rear surface 20 and the top surface 30. FIG. 1 shows a packaging bag 1 in which an opening perforation is formed according to the above process. As shown in FIG. 1, the packaging bag 1 has a total of three opening perforations 60 </ b> A, 60 </ b> B, 60 </ b> C, one on each of the front surface 10, the rear surface 20, and the top surface 30. As shown in FIG. 1, the opening perforation 60A formed on the front surface 10 and the opening perforation 60B formed on the rear surface 20 have the same shape. On the other hand, the opening perforation 60C formed on the top surface 30 is formed by connecting the first portion 61 of the opening perforation shown in FIG. 3 in a mirror-symmetric manner with the valley line 31 of the top surface 30 as a boundary. It has become. That is, in the present embodiment, the first portion 61 of the opening perforation has an inverted U shape, and as a result, an endless (annular) opening perforation 60 </ b> C is formed on the top surface 30.

  By forming the reverse U-shaped opening perforations 60A and 60B on the front surface 10 and the rear surface 20 of the packaging bag as in this embodiment, and simultaneously forming the endless opening perforation 60C on the top surface 30. , It will be easier to open the packaging bag from any surface. In particular, by making the opening perforation 60C provided on the top surface 30 endless, the size of the opening formed by cutting out the opening perforation 60C can be kept constant. Since the size of can be prevented from becoming too large, the sanitary condition in the packaging bag can be maintained to some extent even after the opening is formed.

(2. Second Embodiment)
Then, with reference to FIG.5 and FIG.6, the manufacturing method of the packaging bag which concerns on the 2nd Embodiment of this invention is demonstrated. The second embodiment will not be described with respect to the same points as in the first embodiment, and will be described with a focus on differences from the first embodiment. That is, the shape of the opening perforation formed in the packaging bag is different between the first embodiment and the second embodiment. In addition, about the manufacturing process of a packaging bag, 1st Embodiment and 2nd Embodiment have the same process. Moreover, except for the shape of the perforation for opening, the packaging bag manufactured by the manufacturing method of the first embodiment and the packaging bag manufactured by the manufacturing method of the second embodiment have the same configuration. Yes.

  FIG. 5 is an external perspective view showing an example of the packaging bag 2 manufactured by the manufacturing method according to the second embodiment. FIG. 6 is a perspective sectional view showing a state in which a part of the packaging bag 2 shown in FIG. 5 is cut in the height direction. As shown in FIG. 6, the packaging bag 2 folds the top surface 30 inward along the valley fold line 31, so that the front surface 10, the front side portion 32 of the top surface 30, the rear side portion 33 of the top surface 30, And the back surface 20 forms the overlapping area | region 50 overlapped in the thickness direction (Z direction) of the packaging bag 2 in this order. When the packaging bag 2 is folded, an inverted L-shaped opening perforation 60 is formed across the overlapping region 50 and a region where only the front surface 10 and the rear surface 20 overlap.

  Specifically, in the second embodiment, the opening perforation 60 includes a first portion 61 located in the overlapping region 50, a linear portion extending along the width direction (Y direction), and a height direction. (X direction) It has an L shape having a linear portion extending downward. Further, in the opening perforation 60, the second portion 62 located in the other region has a linear shape extending continuously downward from the first portion 61 in the height direction (X direction). Thus, in this embodiment, the opening perforation 60 is formed in an inverted L shape as a whole. About the dimension etc. which form the perforation 60 for opening, it can adjust suitably. For example, in the first portion 61 of the opening perforation 60, the linear portion extending along the width direction (Y direction) is formed over 50% to 90% of the length of the overlapping region 50 in the width direction. It is preferable. In addition, among the first portions 61 of the opening perforation 60, the linear portion extending along the height (Y direction) is at a position that reaches 50% to 90% of the length of the overlapping region 50 in the height direction. It is preferable that it is formed so that it may extend. The second portion 62 of the opening perforation 60 is preferably formed to extend to a position that reaches 30% to 90% of the length in the height direction of the region where only the front surface 10 and the rear surface 20 overlap. .

  As described above, by forming the perforation 60 for opening in the overlapping region 50 where the sheets constituting the front surface 10, the rear surface 20, and the top surface 30 overlap each other, the front surface 10, An opening perforation can be simultaneously formed on each of the rear surface 20 and the top surface 30. That is, as shown in FIG. 5, the packaging bag 2 in the second embodiment has three opening perforations 60 </ b> A and 60 </ b> B, one on each of the front surface 10, the rear surface 20, and the top surface 30. , 60C are formed. As shown in FIG. 5, the opening perforation 60 </ b> A formed on the front surface 10 and the opening perforation 60 </ b> B formed on the rear surface 20 are respectively reverse L-shaped and have the same shape. On the other hand, the opening perforation 60 formed in the region including the overlapping region 50 is formed in an inverted L shape, and as a result, a U-shaped opening perforation 60C is formed on the top surface 30.

  As described above, the reverse L-shaped opening perforations 60A and 60B are formed on the front surface 10 and the rear surface 20 of the packaging bag, and at the same time, the substantially U-shaped opening perforations 60C are formed on the top surface 30. Therefore, it is easy to open the packaging bag from any surface. In particular, the opening formed by cutting the opening perforation 60C while gradually breaking the opening perforation 60C by making the opening perforation 60C provided on the top surface 30 into a substantially U-shape. The size of can be adjusted. Further, even if all of the substantially U-shaped opening perforations 60C are broken, the portion surrounded by the opening perforations 60C remains without leaving the top surface 30, so the opening perforations 60C should be cut off. The opening formed in (1) can be closed again, and even after the opening is formed, the sanitary condition in the packaging bag can be maintained to some extent.

(3. Third embodiment)
Next, with reference to FIGS. 7 and 8, a method for manufacturing a packaging bag according to a third embodiment of the present invention will be described. In the third embodiment, the description of the same points as in the first embodiment will be omitted, and the description will focus on the points that are different from the first embodiment. That is, the shape of the opening perforation formed in the packaging bag is different between the first embodiment and the third embodiment.

  FIG. 7 is an external perspective view showing an example of the packaging bag 3 manufactured by the manufacturing method according to the third embodiment. 8 is a perspective sectional view showing a state in which a part of the packaging bag 3 shown in FIG. 7 is cut in the height direction. As shown in FIG. 8, the packaging bag 3 has a front surface 10, a front side portion 32 of the top surface 30, a rear side portion 33 of the top surface 30, by folding the top surface 30 inward along the valley fold line 31. And the back surface 20 forms the overlapping area | region 50 overlapped in the thickness direction (Z direction) of the packaging bag 3 in this order. When the packaging bag 3 is folded, a U-shaped opening perforation 60 having an opening at one end in the width direction is formed in the overlapping region 50. That is, in the third embodiment, the opening perforation 60 is located only in the overlapping region 50. Further, the opening perforation formed in the overlapping region 50 is formed in a U-shape (a lying U-shape) extending in the width direction, with one end side in the width direction being an opening. About the dimension etc. which form the perforation 60 for opening, it can adjust suitably, For example, the perforation 60 for opening is formed covering 50%-90% of the length of the width direction of the superimposition area | region 50. Preferably it is. Further, the distance between the two straight portions forming the U-shape may be about 10 mm to 50 mm.

  As described above, by forming the perforation 60 for opening in the overlapping region 50 where the sheets constituting the front surface 10, the rear surface 20, and the top surface 30 overlap each other, the front surface 10 is formed. The opening perforation can be simultaneously formed on each of the rear surface 20 and the top surface 30. That is, as shown in FIG. 7, the packaging bag 3 in the third embodiment is provided at one location on each of the front surface 10, the rear surface 20, the front side portion 32 of the top surface 30, and the rear side portion 33 of the top surface 30. A total of four opening perforations 60A, 60B, 60C, 60D are formed. As shown in FIG. 7, the opening perforations 60A, 60B, 60C, 60D formed on the respective surfaces 10, 20, 32, 33 are all U-shaped extending in the width direction and have the same shape. ing.

As described above, the opening perforations 60A and 60B are formed on the front surface 10 and the rear surface 20 of the packaging bag, and at the same time, the opening perforations 60C and 60D are formed at two locations on the top surface 30. Even if it exists, it becomes easy to open the packaging bag. In particular, by forming the opening perforations 60C and 60D at two places on the top surface 30, a relatively small opening is formed in the packaging bag 3, and articles such as disposable diapers accommodated therein are dispensed. Therefore, even after the packaging bag 3 is opened, it is possible to effectively prevent foreign matters such as dust and dirt from entering the packaging bag 3 and to improve the hygiene of the packaging bag. The state can be maintained.

  As mentioned above, in this specification, in order to express the content of this invention, preferred embodiment of this invention was described, referring drawings. However, the present invention is not limited to the above-described embodiments, but includes modifications and improvements obvious to those skilled in the art based on the matters described in the present specification.

  The present invention relates to a packaging bag for disposable diapers and the like and a method for producing the same. For this reason, this invention can be utilized suitably in the manufacturing industry etc. of a disposable diaper.

1 ... Packaging bag (first embodiment)
2 ... Packaging bag (second embodiment)
3 ... Packaging bag (third embodiment)
DESCRIPTION OF SYMBOLS 10 ... Front 11 ... 1st seal | sticker part 12 ... 2nd seal | sticker part 20 ... Rear surface 30 ... Top surface 31 ... Tanifold line 32 ... Front side part 33 ... Rear side part 40 ... Bottom surface 50 ... Overlapping area 60 ... Perforation for opening 61 ... 1st part 62 ... 2nd part 70 ... Double part 71 ... Handbag

Claims (4)

A method of manufacturing a packaging bag having a perforation for opening,
The packaging bag
A front surface (10) and a rear surface (20) in which both ends in the width direction are coupled to each other;
In the state where the front surface (10) and the rear surface (20) are located at the upper part in the height direction and are folded inward along a valley fold line (31) extending in the width direction, the front surface (10) and the rear surface ( 20) the top surface (30) sandwiched between,
A bottom surface (40) formed by closing an opening located at a lower portion in the height direction of the front surface (10) and the rear surface (20),
The manufacturing method is as follows:
The top surface (30) is folded inward, and the front surface (10) and the front side portion (32) located on the front surface (10) side of the top surface (30) with respect to the valley fold line (31). In the state where the rear side portion (33) located on the rear surface (20) side of the trough fold line (31) in the top surface (30) and the rear surface (20) overlap four layers. ,
A U-shaped opening perforation (60) extending in the width direction with one end side in the width direction as an opening is formed in the overlapping region (50), which is an area overlapping the four layers, so that the front surface (10 ), Perforations for opening (60A, 60B, 60C, 60D) having the same shape are formed simultaneously on each of the rear surface (20), the front side portion (32), and the rear side portion (33). A method for manufacturing a packaging bag having a process. The opening perforation (60A) formed on the front surface (10), the opening perforation (60B) formed on the rear side (33), and the opening perforation formed on the front side (32). (60C) and the opening perforation (60D) formed in the rear side portion (33) are separated from each other.
The manufacturing method of the packaging bag of Claim 1. A packaging bag having perforations for opening,
A front surface (10) and a rear surface (20) in which both ends in the width direction are coupled to each other;
The front surface (10) and the rear surface (20) are positioned in the upper part in the height direction of the front surface (10) and the rear surface (20) and folded inward along a valley fold line (31) extending in the width direction. ) Between the top surface (30),
A bottom surface (40) formed by closing an opening located at a lower portion in the height direction of the front surface (10) and the rear surface (20),
The top surface (30) is folded inward, and the front surface (10) and the front side portion (32) located on the front surface (10) side of the top surface (30) with respect to the valley fold line (31). When the a side (33) after positioned in the said rear surface than valley fold lines (31) (20) side of the top surface (30), the rear surface (20), but overlapping area overlapping the four layers (50), a U-shaped opening perforation (60) extending in the width direction with one end side in the width direction as an opening is formed,
Each of the front surface (10), the rear surface (20), the front side portion (32), and the rear side portion (33) has one opening perforation (60A, 60B, 60C, 60D) having the same shape. ) Is formed packaging bag. The opening perforation (60A) formed on the front surface (10), the opening perforation (60B) formed on the rear side (33), and the opening perforation formed on the front side (32). (60C) and the opening perforation (60D) formed in the rear side portion (33) are separated from each other.
The packaging bag according to claim 3.

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