JP2014055004A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag with simple constitution which can have an opening of sufficient size easily formed.SOLUTION: A pillow type packaging bag 10 which contains a press-through pack package includes: a pair of edge joint parts 20 formed by joining both opening ends of a cylindrical sheet; one or more side joint parts 12 formed by joining mutually opposite ends of the sheet together at a width-directional end position of the packaging bag 10; and a cut 14 formed in the side joint part 12, the side joint part 12 being weakly joined to enable unjoining with human's hands.

Description

  The present invention relates to a pillow-type packaging bag that accommodates a press-through pack package.

  2. Description of the Related Art Conventionally, a press-through pack package (hereinafter referred to as “PTP package”) in which tablets and drug capsules are packaged one by one on a sheet is widely known. Such PTP packages are often grouped together and stored in a pillow type packaging bag. A packaging bag is usually configured by bonding both ends of a single sheet material into a cylindrical shape and then bonding open ends on the upper and lower sides of the cylindrical shape.

  Usually, the PTP package is formed with a large number of receiving recesses in a hard resin sheet such as a vinyl chloride sheet, an unstretched polypropylene sheet, or a polyethylene terephthalate sheet, and after storing solids such as tablets in the receiving recesses, The opening is covered with a lid made of aluminum foil or glassine paper coated with a heat sealant, or a laminate thereof. Therefore, the base portion of the PTP package is often relatively rigid and can hardly be deformed. Therefore, in order to take out the PTP package from the packaging bag, it is necessary to form an opening having a size corresponding to the width or height of the PTP package (opening that can be taken out without folding the PTP package) in the packaging bag. is there.

JP-A-5-270552 JP 2010-58839 A

  However, conventionally, there has been no technique that can easily form a sufficiently large opening in a packaging bag. For example, there has been conventionally known an unsealing method in which a notch (cut) is provided at the upper end of a packaging bag, and a part of the packaging bag is cut from the notch in the height direction (vertical direction) to form an opening. Yes. In the case of such an opening method, a part of the packaging bag to be cut often interferes with the PTP package in the process of proceeding in the vertical direction, and further progress in the vertical direction is often hindered. In this case, since the vertical tearing stops, a sufficiently large opening cannot be obtained.

  Therefore, in some cases, a notch is provided in the back-pasted part formed by gluing the sheet material, and a part of the packaging bag is cut in the width direction (lateral direction) from the notch to form an opening. Has also been proposed. According to this technique, even if the packaging bag is torn laterally, a part of the packaging bag to be cut does not interfere with the PTP package, so that a sufficiently large opening can be obtained. However, in general, a packaging bag is often packaged with a PTP packaging body so as to prevent the bag from sagging so that the PTP packaging body does not move inside the packaging bag. In this case, the packaging bag can hardly be deformed in the state before opening, and raises the back pasting portion that falls down along the back surface of the packaging bag, and then tears it laterally from the back pasting portion. It was difficult to go.

  Further, as another technique, it has been proposed to use an easily tearable sheet in which a non-penetrating scar group is formed as a sheet material constituting a packaging bag (for example, Patent Document 1). According to such a technique, a sufficiently large opening can be formed relatively easily. However, in this case, since it is necessary to prepare and prepare a specially processed sheet material called an easily tearable sheet in advance, there is a problem that the cost and labor of manufacturing increase.

  Patent Document 2 discloses that the vicinity of the upper end of the packaging bag is sealed in a substantially U-shape, but how to actually open the packaging bag or how to form the opening is disclosed. Is not described at all.

  That is, conventionally, there has been no packaging bag that can easily form a sufficiently large opening with a simple configuration. Accordingly, an object of the present invention is to provide a packaging bag having a simple configuration that can easily form a sufficiently large opening.

  The packaging bag of the present invention is a pillow-type packaging bag that accommodates a press-through pack package, and is formed by joining a pair of edge joining portions formed by joining both open ends of a tubular sheet, and the packaging bag. One or more side joints formed by joining sheets facing each other in the width direction end position, and formed in the side joint, functioning as a tear starting part when the packaging bag is torn in the width direction An opening start portion, and, among the side joint portions, at least the joining of the sheets in the inner portion in the height direction than the opening start portion is a weak joint that can be released by a human hand. It is characterized by that.

  In a preferred aspect, the opening start portion is a cut extending in a width direction from an end edge in the width direction of the packaging bag in the side joint portion. In another preferred aspect, the packaging bag has a gusset configured by folding a part of the cylindrical sheet inward.

  The packaging bag of the present invention has a simple configuration in which at least a part of the side joint portion is weakly joined, and after tearing in the width direction from the opening start portion, the weak joint of the side joint portion is released. A sufficiently large opening can be easily obtained.

It is a perspective view of the packaging bag which is embodiment of this invention. It is the schematic which shows the mode of the opening obtained by opening a packaging bag. It is a schematic rear view which shows an example of another packaging bag. It is a schematic rear view which shows an example of another packaging bag. It is a schematic rear view which shows an example of the conventional packaging bag.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a packaging bag 10 for a PTP package according to an embodiment of the present invention.

  The packaging bag 10 is a pillow type bag configured by bending and joining one sheet material. Specifically, the packaging bag 10 is formed by joining both ends of one sheet material in a palm shape and joining them to form a cylinder, and then joining a pair of open ends positioned above and below the cylinder. It is configured in a bag shape by sealing. The part joined in the shape of a palm is the back pasting part 18, and the part joining the open ends is the edge joining part 20. Moreover, the side surface of the packaging bag 10 is provided with a gusset 16 (gusset) configured by joining the sheet material in a folded state. By providing this gusset 16, the thickness of the entire packaging bag 10 can be increased, and the capacity of the packaging bag 10 can be increased.

  The packaging bag 10 of the present embodiment further forms a side joining portion 12 in which opposing sheets are joined at the end in the width direction of the packaging bag 10, and the side joining portion 12 becomes a notch that becomes an opening start portion 13. 14 is formed. The reason why the side joint portion 12 and the opening start portion 13 are provided is to enable easier opening, but the detailed reason will be described in detail later.

  The sheet material constituting the packaging bag 10 is usually composed of a resin film. The resin film that constitutes the sheet must have basic performance as a package, such as impact resistance, wear resistance, and heat resistance, as well as appropriate light shielding and gas barrier properties. Often. Moreover, since the back pasting part 18, the edge joining part 20, and the side joining part 12 are normally formed by heat sealing, the heat sealing property is also required for the sheet material. Therefore, as the sheet material, a multi-layer sheet having a base film layer (which may be a single layer or a multi-layer) and a sealant layer imparting heat sealability is preferable, and further, a base film It is preferable to provide a gas barrier layer between the layer and the sealant layer, or when the base film layer is a multilayer.

  Here, constituent materials of the base film layer, the sealant layer, and the gas barrier layer are exemplified. In addition, lamination | stacking of these each layer can be performed by the conventional lamination method, for example, the dry lamination by an adhesive agent, the heat lamination which adhere | attaches with a heat | fever by pinching | interposing a heat bonding layer.

  Examples of the film constituting the base film layer include polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polycarbonate (PC), etc.), polyolefin (polyethylene (PE), polypropylene ( PP), etc.), polyamide (nylon-6, nylon-66, etc.), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polymethyl methacrylate (PMMA), poly A stretched or unstretched film having one layer or two or more layers composed of ether sulfone (PES) and ethylene-vinyl alcohol copolymer (EVOH) can be exemplified.

  The films constituting the sealant layer include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene-propylene copolymer (EP), unstretched polypropylene (CPP), and biaxially stretched nylon (ON). , Ethylene-olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-vinyl acetate copolymer (EVA), etc. A stretched or unstretched film can be exemplified.

  The gas barrier layer may be a metal thin film such as aluminum, a resin film such as vinylidene chloride (PVDC) or ethylene-vinyl alcohol copolymer (EVOH), or any synthetic resin film (for example, a base film layer). ), And a film obtained by vapor-depositing (or sputtering) an inorganic oxide such as aluminum, aluminum oxide or silica. In particular, when a metal thin film such as aluminum or an aluminum vapor deposition film is used, light shielding properties are also imparted, which is more preferable.

  In order to facilitate the opening of the packaging bag 10, the base film layer is a biaxially stretched film that is easily tearable by human hands even if there is no cut or the like, so-called notchless film. May be used. Specifically, it may be a notchless film having a tensile fracture strength in the longitudinal and lateral directions of 50 MPa to 80 MPa and an end tear resistance of 30 N to 60 N. The tensile fracture strength is a value measured according to JIS K 7127, and the end tear resistance is a value measured according to JIS C 2318. The material of the notchless film is not particularly limited, and the same material as the base film layer shown above can be used. Among them, polyester is preferable, and polyethylene terephthalate (PET) is particularly preferable.

  The configuration of the sheet material described above is an example, and may be changed as appropriate. For example, when the sheet materials are joined using an adhesive or the like instead of heat sealing, the sealant layer may not be formed. Moreover, after opening the packaging bag 10, in order to bend a part of the packaging bag 10 so that the opening formed by opening can be closed, the sheet material has an appropriate shape retaining property. Is desirable.

  As is well known, the PTP package accommodated in the packaging bag 10 is one in which tablets, chemical capsules, etc. are packaged one by one with plastic or the like on a metal sheet made of aluminum or the like. In one packaging bag 10, a plurality of PTP packaging bodies are accommodated in a state where they overlap in the thickness direction. The packaging bag 10 wraps the laminate of the plurality of PTP packaging bodies with such adhesiveness that the sheet material cannot sag. The reason why the sheet material does not sag in this way is to prevent the PTP package from moving inside the packaging bag 10.

  As is well known, the PTP package accommodated in the packaging bag 10 is formed with a large number of accommodating recesses in a hard resin sheet such as a vinyl chloride sheet, an unstretched polypropylene sheet, or a polyethylene terephthalate sheet, and tablets or the like are formed in the accommodating recesses. After the solid material is stored, the opening of the storage recess is covered with a lid made of aluminum foil or glassine paper coated with a heat sealant, or a laminate thereof. In one packaging bag 10, a plurality of PTP packaging bodies are accommodated in a state where they overlap in the thickness direction. In addition, a several PTP package is laminated | stacked in the state which changed the direction of the front and back alternately. Moreover, the accommodating part which accommodates packaging objects, such as a tablet and a capsule, is protrudingly formed in the surface of each PTP package. This accommodating part is arrange | positioned so that the height position may shift | deviate, when a PTP package is laminated | stacked by changing direction of front and back alternately. The packaging bag 10 has such a size that it can wrap a laminate of the plurality of PTP packaging bodies with such adhesiveness that the sheet material cannot sag. The reason why the sheet material does not sag in this way is to prevent the PTP package from moving inside the packaging bag 10.

  Here, the base of the PTP package 100 is a hard resin sheet as described above and generally hardly deforms (the size does not decrease). Therefore, in order to take out the PTP package from the packaging bag 10, an opening corresponding to the width or height of the PTP package is required. Moreover, the difference in size between the packaging bag 10 and the PTP package is small. Therefore, when taking out the PTP package from the packaging bag 10, it is necessary to tear the packaging bag 10 over the entire width or height to form a sufficiently large extraction opening.

  However, it has heretofore been difficult to tear the packaging bag 10 over the entire width or height in a simple procedure. This will be described with reference to FIG. FIG. 5 is a schematic rear view of a packaging bag 10 for a conventional PTP package 100.

  Many of the conventional packaging bags 10 employ an unsealing method that tears in a longitudinal direction (height direction) from a cut 50 provided at the upper end of the packaging bag 10. When tearing in the vertical direction from the notch 50 provided at the upper end, the user pulls the upper end of the packaging bag 10 by hand while pulling it downward. However, in this case, a part of the packaging bag 10 pulled to the front lower side hits the PTP package 100 in the middle. When a part of the packaging bag 10 hits the PTP package 100, further downward progress becomes difficult and the tear is bent in the lateral direction. As a result, the tear reaches the side end of the packaging bag 10 before reaching the lower end of the packaging bag 10, and a part of the packaging bag 10 is cut off. In this case, since the opening obtained is significantly smaller than that of the PTP package 100, the PTP package 100 cannot be taken out as it is. Therefore, the user needs to tear the completed small opening and tear it again in the vertical direction. That is, in this unsealing method, the user needs two steps for unsealing. Moreover, in the case of this vertical tear, the opening formed cannot be closed after opening. In this case, since the PTP package 100 jumps out of the packaging bag 10, it becomes difficult to store the PTP package 100 in the packaging bag 10.

  Thus, in some cases, an opening method has been proposed in which a cut 52 for lateral tearing is formed in the back pasting portion 18 and the packaging bag 10 is torn from the back pasting portion 18 to form an opening. According to such an unsealing method, a part of the package bag 10 to be cut out does not interfere with the PTP package 100, so that it can be split across the entire width. Further, after opening, if the upper end of the opening is bent, the opening is temporarily closed and the PTP package 100 is prevented from popping out.

  However, as described above, many of the packaging bags 10 wrap the PTP package 100 with such an adhesiveness that hardly sags. Therefore, the packaging bag 10 can hardly be deformed at the stage before opening. As a result, at the stage before opening, there was a problem that it was very difficult to pick up and raise the back sticking portion 18 that fell down along the back surface of the packaging bag 10 due to lateral tearing.

  Therefore, in this embodiment, a special unsealing method is adopted in order to make it easier to unseal. Hereinafter, this will be described with reference to FIGS. 1 and 2. FIG. 2 is a schematic view of an opening formed by opening the packaging bag 10.

  As described above, in the present embodiment, the side joint portion 12 and the opening start portion 13 formed on the side joint portion 12 are provided in order to enable easy opening. The side joining portion 12 is configured by joining sheets facing each other at the widthwise end of the packaging bag 10. As shown in FIG. 1, two side joints 12 are provided in total in the width direction both ends of the packaging bag 10, and each side joint 12 is connected to the width direction end of the upper edge joint 20. ing. In other words, at the upper end of the packaging bag 10, a substantially U-shaped joint portion including an upper edge joint portion 20 and a pair of side joint portions 12 is formed.

  In addition, if the side junction part 12 is provided between the width direction edge part of the packaging bag 10, and the upper edge junction part 20 and the height direction edge part of a PTP package body, the position and number The shape may be changed as appropriate. For example, in this embodiment, although the side junction part 12 and the edge junction part 20 are connected, both may be spaced apart as shown in FIG. Moreover, in this embodiment, although the side junction part 12 is provided only in the upper side of the packaging bag 10, you may provide the same side junction part 12 and the opening start part 13 also in the lower side. Moreover, in this embodiment, although the side junction part 12 is provided in the left-right both sides of the packaging bag 10, you may make it provide only in one of right and left. Furthermore, the shape of the side joint portion 12 is not limited to a substantially rectangular shape as long as the shape includes the edge of the width direction end portion, but may be another shape, for example, a semicircle or a triangle.

  A cut 14 serving as an opening start portion 13 of the packaging bag 10 is formed inside the side joint portion 12. The cut 14 extends in the width direction from the width direction end of the packaging bag 10, and assists the tearing of the packaging bag 10 in the width direction. In the present embodiment, the cut 14 is used as the opening start portion 13, but any other form may be used as the opening start portion 13 as long as it can induce tearing in the width direction. For example, an easy-opening process has been conventionally known in which a minute scratch group is formed on a sheet so that the sheet material can be easily torn without being cut. You may handle the location which gave this easy opening process as the opening start part 13. FIG. Therefore, for example, when the easy opening process is performed on the entire surface of the side bonding portion 12, the entire surface of the side bonding portion 12 functions as the opening start portion 13. Moreover, you may comprise the packaging bag 10 using the biaxially stretched film sheet with high tearability, what is called a notchless film sheet, which tears even if there is no cut. In this case, the packaging bag 10 can be torn without providing the cut 14 or performing an easy opening process. Therefore, in this case, the entire surface of the side joint portion 12 functions as the opening start portion 13.

  The reason for forming the opening start portion 13 in the side joint portion 12 is to maintain the sealing property of the packaging bag 10 and to facilitate the tearing operation. That is, in the case where the opening start portion 13 is a scratch that penetrates the sheet material such as the notch 14, if the penetration scratch (opening start portion 13) is formed in a non-joined portion where the opposing sheets are not joined, naturally. However, the inside and outside of the packaging bag 10 are communicated with each other through the penetrating wound, and the sealing property of the packaging bag 10 is impaired. Further, even when the opening start portion 13 is configured by non-penetrating scratches such as a group of non-penetrating minute scars, the opening starting portion 13 is easily torn and unintended tearing is likely to occur. It has become. When the unsealing start part 13 which is likely to cause such unintended tearing is formed in the non-joined part, if the unintended tearing occurs, the sealing property of the packaging bag 10 is immediately impaired. Therefore, the opening start portion 13 is provided at a joint portion that can ensure hermeticity even if unintended tearing occurs.

  Moreover, when tearing the said packaging bag 10 from the edge part of the packaging bag 10, if the folded sheet | seat is not joined, these sheets will tend to behave mutually differently. As a result, for example, there is a problem that slipping occurs between the folded sheets or the folded sheets are torn apart in different directions. On the other hand, when the folded sheets are joined to each other in the vicinity of the opening start portion 13, the sheets are torn apart in the same direction without slipping, and thus are very easy to tear. Therefore, the opening start part 13 is formed in the side joining part 12 to which the opposing sheets are joined.

  Thus, by providing the opening start part 13 in the side junction part 12, the sealing property of the packaging bag 10 can be maintained, and it becomes easy to tear, On the other hand, the opening obtained by opening is not provided. The problem of being small arises. In the present embodiment, in order to break this problem, the bonding at the side bonding portion 12 is a weak bonding that can be released manually. In addition, in FIG. 1, the hatching location with small density has shown the weak junction part. This will be described with reference to FIG. FIG. 2 is a schematic view of the opening obtained when the packaging bag 10 is opened from the opening start portion 13 in the width direction.

  When the packaging bag 10 is torn and opened from the opening start portion 13, the resulting opening has a shape as shown in FIG. That is, the sheets constituting the gusset 16 are joined to each other at both ends in the width direction of the packaging bag 10. Therefore, the gusset 16 is not opened at the stage immediately after opening. As a result, the opening has a small width in the thickness direction.

  With such a small opening, it becomes difficult to take out the PTP package. Therefore, in the present embodiment, as described above, the bonding of the side bonding portion 12 is a weak bonding that has a weaker bonding force than other bonding portions and can be released by a human hand. The term “joining release by human hand” means that the sheets joined to each other are pulled apart by a human hand in a direction away from each other without breaking the sheets.

  Such weak joining can be obtained by making the heating temperature at the time of joining smaller than other joining parts. That is, the packaging bag 10 of this embodiment is configured by folding a sheet material having a sealant layer formed on one side so that the sealant layer is on the inside. In the case of joining sheets that are opposed to each other, pressure is applied while heating the joining portion to melt the sealant material. When joining firmly like the edge joining part 20, it heats to temperature sufficiently higher than melting | fusing point temperature of sealant material. On the other hand, in the case of weak bonding, the heating temperature may be set lower than usual, and desirably set near the melting point temperature of the sealant material.

  And opening of sufficient magnitude | size can be easily obtained by making a side junction into a weak junction in this way. That is, immediately after opening the packaging bag 10, as shown in FIG. 2A, only a narrow opening in which the gusset 16 is closed (joined) can be obtained. However, the gusset 16 is weakly bonded and can be easily released by a human hand. Therefore, after opening, the user applies a force in the direction of widening the opening (in the direction of arrow B in FIG. 2) to the sheet. For example, two fingers are put in the opening and the two fingers are thickened. If it is spread in the direction and away from each other, as shown in FIG. 2B, the joining of the gusset 16 is released and the gusset 16 is opened. Thereby, a sufficiently large opening can be obtained. As a result, the PTP package can be easily taken out.

  After opening the packaging bag 10, if the upper end of the packaging bag 10 is bent, the opening can be temporarily closed, so that the PTP package can be stored in the packaging bag 10. In addition, in order to be able to bend this upper end more reliably several times, as shown in FIG. 3, you may make the dimension of the height direction of the packaging bag 10 longer than usual.

  As is apparent from the above description, in the present embodiment, the side joint portion 12 on which the opening start portion 13 is formed is a weak joint that can be joined and released by a human hand. Therefore, after tearing the packaging bag 10 from the end in the width direction, an opening necessary for taking out the PTP package can be obtained by a very simple procedure of opening the resulting opening with a human hand. Moreover, even after obtaining such an opening, if the upper end of the packaging bag 10 is bent, the opening can be temporarily closed, and the PTP can be stored stably.

  In addition, in this embodiment, although the whole side junction part 12 is made into weak junction, after cutting from the opening direction start part 13 at least the height direction inner side among the side junction parts 12, ie, the opening start part 13. If the part remaining in the packaging bag 10 is included, only a part of the side joint 12 may be weakly joined and the other part may be normally joined. Therefore, as shown in FIG. 4, only the range below the notch 14 which is the opening start part 13 among the side junction parts 12 is made into a weak junction part, and another site | part is good also as normal joining. In FIG. 4, a hatched portion having a small density is a portion where weak bonding is performed.

  DESCRIPTION OF SYMBOLS 10 packaging bag, 12 side junction part, 13 opening start part, 14, 50, 52 cut, 16 gusset, 18 back sticking part, 20 edge junction part.

Claims (3)

A pillow-type packaging bag that accommodates a press-through pack package,
A pair of edge joints formed by joining both open ends of the tubular sheet; and
One or more side joints formed by joining sheets facing each other in the width direction end position of the packaging bag;
An opening start portion that is formed in the side joint portion and functions as a tear start portion when the packaging bag is torn in the width direction;
Among the side joints, at least the joint between the sheets in the height direction inner part than the opening start part is a weak joint that can be joined and released by a human hand.
A packaging bag characterized by that. The packaging bag according to claim 1,
The said opening start part is a cut | notch extended in the width direction from the width direction edge of the said packaging bag in the said side junction part, The packaging bag characterized by the above-mentioned. The packaging bag according to claim 1 or 2,
The said packaging bag has a gusset comprised by folding in part a part of the said cylindrical sheet | seat inside, The packaging bag characterized by the above-mentioned.

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