JP6288819B2 - Easy-open pillow packaging bag - Google Patents

Description

  The present invention relates to a pillow packaging bag for storing contents having a thickness mainly including a PTP (press-through package) sheet, and more specifically, requires a complicated opening operation. The present invention relates to an easy-open pillow packaging bag having a tear-inducing structure for ensuring a large opening for taking out the contents.

In the field of pharmaceutical packaging, PTP sheets are widely used for packaging solid drugs such as tablets and capsules. As a form of collective packaging of medicines filled in these PTP sheets, a plurality of sheets are often bundled and stored in a bag-like secondary package.
The form of the bag used for this secondary packaging has a palm-shaped back-pasted portion at the center, which is a joint between the side ends in the width direction of the packaging material, and both ends in the flow direction are laterally sealed. Pillow-shaped bags are often used. Further, when a large number of PTP sheets are accommodated, a bunched gusset bag having gusset-like folds on both side surfaces is often used.
In general, the packaging bags for storing these PTP sheets are opened by tearing in the vertical direction from notches or jagged end portions (so-called jagged cut portions) formed in the lateral seal portion.
When opening in the vertical direction from the giza cut portion, it is often difficult to remove the contents due to the lack of the opening portion, depending on the method of opening operation. This is particularly likely when the contents are thick and the secondary packaging bag is tight.
In addition, when opening the vicinity of the horizontal seal part with a scissors or the like, it is possible to take out the contents by picking out the contents from the opening, but only a tool such as a scissors is required for opening. As the number of contents increases, it is more difficult to take out the entire contents by one operation.

Several methods have been proposed to solve these problems. For example, Patent Document 1 reports a method of providing perforated cut lines on both sides of the back surface of the back-sealed seal portion of a pillow bag. However, if the film breaks due to the notch provided on the back-pasted part and the tear does not reach the score line on both sides, the opening is not sufficiently secured and the contents are taken out. May be difficult. Moreover, since the opening operation limited to one direction is requested | required from a back sticking part, it cannot be said that it is intuitive opening operation.
Moreover, in patent document 2, the method of providing a straight perforation line in the circumferential direction of the cylinder which forms a packaging bag, and guiding opening is used. This method is suitable when the tear distance is short, such as stick packaging, but because it tends to deviate from the tear guide line, it becomes more difficult to secure an appropriate opening size as the contents become larger. There is a disadvantage that it ends up.
Patent Document 3 introduces a technique in which continuous fine flaw holes are provided in the back-sticking seal portion and both end surface portions of a pillow package, and tearing is performed in the width direction of the cylinder. However, with this method, it is necessary to include a film with linear cut properties such as uniaxially stretched polyester and uniaxially stretched nylon in order to provide linear tearability, and there are disadvantages in terms of configuration restrictions and cost. To do. There is also a problem that the contents are thick and difficult to apply to a gusset-shaped tight pillow bag.

JP 2008-105719 A JP 2009-001310 A JP 2009-227325 A

  An object of the present invention is to provide an easy-open pillow packaging bag in which an opening from which a content can be easily taken out by tearing the bag from a lateral seal portion can be formed.

In order to solve the above problems, the present invention comprises a laminated film having a multilayer structure having at least a base material layer and a heat-sealable sealant layer on the inner surface, and a sealant layer on a left edge and a right edge of the laminate film. And a back seal portion formed on the back side, and a contents storage portion is provided by a top seal portion where the upper end edge portion is heat-sealed and a bottom seal portion where the lower end edge portion is heat-sealed. A pillow packaging bag comprising: a back surface on which the back seal portion is formed; a front surface that is a surface facing the back surface; and two side surfaces that are surfaces formed between the front surface and the back surface. At least one of the two side surfaces, at least on the front side of the side surface, as a tear guide line that can be opened along the up-down direction regardless of whether the tear is started from either the top seal portion or the bottom seal portion. One and the tearing guide lines, possess at least one tear guiding line on the back side surface, the tearing guide lines, respectively provided only on the inner side than 1mm than side ends of the pillow packaging bag, wherein Provided is an easy-open pillow packaging bag characterized by having no seal portion at both ends of a side surface .

It is preferable that the tear guide line includes two or more tear guide lines on the front side of the side surface and two or more tear guide lines on the back side of the side surface .
It is preferable that the tear guide line has a shape that can correct a deviation in the breaking direction due to tearing and does not deviate to a region between the tear guide line on the front side and the tear guide line on the back side.
The tear guide wire is preferably provided in at least one layer excluding the sealant layer.
The tear guide line is preferably formed by punching a base material layer or ablation of the base material layer by carbon dioxide laser irradiation.

According to the present invention, during the opening operation, along the tear guide line from the opening trigger portion at the end of the lateral seal portion (top seal portion or bottom seal portion) toward the end portion of the other lateral seal portion. Since it can be opened in a straight line, an opening for taking out the contents can be secured without excess or deficiency, and thus a pillow packaging with high takeout is provided.
Since the opening is ensured by a single operation from the opening trigger portion of the horizontal seal portion, a complicated opening operation is not required, and intuitive removal is possible.
The tape and zipper for opening are unnecessary, and the effect of reducing bag making cost is high. In addition, it can be applied to various forms without requiring a special packaging machine.
There is no restriction on the material constituting the film, for example, it is not necessary to use a uniaxially stretched film for the base material layer.
Since the surface consisting of the longest side and the shortest side of the rectangular parallelepiped can be greatly opened, the contents can be easily taken out.
Since the tear guide line is provided in both directions, it can be opened from either side.

It is a perspective view which shows an example of the pillow packaging bag which provided easy opening property of this invention. It is a perspective view which shows the mode of the broken line in the middle of opening operation. It is a perspective view which shows the mode of the opening part after completion of opening operation. It is a perspective view which shows the mode of taking out the content after opening operation. It is a perspective view which shows an example of the opening result in case there is no tear guide line. (A)-(i) is a top view which illustrates the shape of a tear guide line. (A)-(d) is a top view which shows a mode that a deformation | transformation perforation is torn from the top to the bottom. (A)-(d) is a top view which shows a mode that a deformation | transformation perforation is torn from the bottom to the top. (A)-(c) is sectional drawing which illustrates the cross-section of a laminated | multilayer film. (A) is a perspective view which shows an example of a gusset type pillow packaging bag, (b) is an end view of the horizontal seal part. It is an expanded view of a gusset type pillow packaging bag. (A) is a perspective view which shows an example of the pillow packaging bag without a gusset, (b) is an end view of the horizontal seal part. It is an expanded view of the pillow packaging bag without a gusset. (A)-(d) is a top view which illustrates the pattern of a tear guide line.

The present invention will be described below based on preferred embodiments with reference to the drawings.
In FIG. 1, an example of the pillow packaging bag 10 which provided the easy-open property of this invention is shown. The pillow packaging bag 10 has a back seal portion 11 formed on the back surface 21 side, and a content storage portion 14 by a top seal portion 12 whose upper end edge is heat-sealed and a bottom seal portion 13 whose lower end edge is heat-sealed. Is provided. The pillow packaging bag 10 includes a back surface 21 on which the back seal portion 11 is formed, a front surface 22 that is a surface facing the back surface 21, and two side surfaces formed between the front surface 22 and the back surface 21. 23, 23. FIG. 1 shows a state in which two tear guide lines 24 a and 24 b are provided on the side surface 23 of the pillow packaging bag 10. In the width direction of the bag, two side surfaces 23, 23 are arranged on the left and right sides of the content storage portion 14, and in the thickness direction of the bag, a front surface 22 and a back surface 21 are disposed before and after the content storage portion 14, In the height direction, the top seal portion 12 and the bottom seal portion 13 are arranged above and below the content storage portion 14.

  As shown in FIG. 9A, for example, the film forming the pillow packaging bag is preferably composed of a laminated film 30 having a multilayer structure having at least a base material layer 31 and a heat sealable sealant layer 32 on the inner surface. A film having a single layer structure can be used as long as it can form a tear induction line having a desired function, but it needs to be a film having a linear cut property over the entire surface, such as a uniaxially stretched resin film. It is sufficient that the portion where the tear guide wire is processed has a straight cut property. The laminated film consists of a base layer made of synthetic resin such as polyester or polyamide, or cellophane or paper, and a sealant layer made of synthetic resin such as heat-sealable polyethylene or polypropylene. Is done. The resin film used for each layer of the laminated film is preferably a biaxially stretched film or an unstretched film.

  The pillow packaging bag is formed by joining the both ends of the laminated film in the width direction by a method such as heat sealing so that the sealant layer is inside, and in the state where the contents are stored, When a pillow packaging bag is formed by sealing both ends laterally (top seal / bottom seal) with a back seal portion, the side 23 has at least two tear guide lines 24a and 24b. It is a feature. The tear guide line 24a on the front surface 22 side of the side surface 23 is closer to the front surface 22 than the center line 25c of the side surface 23, and the tear guide wire 24b on the rear surface 21 side of the side surface 23 is closer to the back surface 21 side than the center line 25c on the side surface 23. Preferably there is. The center line 25c of the side surface 23 may be a virtual line that is the center in the width direction of the side surface 23 (intermediate between the left and right ends 23a and 23b), or may be a line with an entity such as a crease.

  In this pillow packaging bag, the opening trigger portions 12a and 13a that start tearing are provided in at least one of the top seal portion 12 or the bottom seal portion 13, and a V-shaped or I-shaped notch is formed as the shape. In addition to being usable, it may have a jagged shape. In order to be able to start tearing from any of the top seal portion 12 and the bottom seal portion 13, it is preferable to provide opening trigger portions 12 a and 13 a on both the top seal portion 12 and the bottom seal portion 13.

  The opening operation of the pillow packaging bag starts from one of the top seal portion 12 and the bottom seal portion 13 toward the other side seal portion (from the top seal portion 12 to the bottom seal portion 13). Or from the bottom seal portion 13 to the top seal portion 12). At this time, starting from the opening trigger part, as shown in FIG. 2, two break lines 25a and 25b having different trajectories are generated on the front surface 22 side and the back surface 21 side, respectively. These two break lines 25a and 25b are It wraps around from the outside of the two tear guide lines 24a, 24b provided on the side surface 23 of the pillow packaging bag, and merges onto the respective tear guide lines 24a, 24b. The breaking line 25a on the front surface 22 side joins the tearing induction line 24a on the front surface 22 side, and the breaking line 25b on the back surface 21 side merges on the tearing induction line 24b on the back surface 21 side.

  The tear guide lines 24a and 24b are shaped so that the break lines 25a and 25b do not deviate to the inside of the two tear guide lines 24a and 24b, that is, the region 25 between the tear guide lines 24a and 24b. The breaking lines 25a and 25b are directed toward the ends according to the tear guide lines 24a and 24b, thereby forming a large opening 26 in the side surface 23 as shown in FIG. By this series of operations, the contents 27 can be easily taken out from the large opening 26 as shown in FIG. The tear guide wires 24a and 24b may be provided on one side or both sides of the side surface 23 having two surfaces.

  FIG. 5 shows a result of forming a pillow packaging bag 100 without providing a tear guide wire on the side surface 23 and performing a similar opening operation. The two break lines 25a and 25b generated from the opening trigger portion 12a as the starting point are converged into one after reaching the side surface 23 of the pillow packaging bag 100 and before reaching the end. The opening operation ends. Therefore, the size of the opening sufficient for taking out the contents cannot be secured.

  FIG. 6 is an example of the shape of a tear guide wire applied to the side surface of the pillow packaging bag. 6 (a)-(d) and FIGS. 6 (f)-(i) represent examples of deformation perforations, and FIG. 6 (e) is a straight continuous tear guide line applied by a carbon dioxide laser. An example of The tear guide line plays the same role as a zipper, but the two tear guide lines are formed in a combination of shapes that can accommodate up and down bi-directional opening. For example, in FIGS. 6D, 6 </ b> F, and 6 </ b> G, two tear guide lines are arranged symmetrically on the left and right. 6 (a), (b), (c), and (i), two tear guide lines are arranged point-symmetrically around one point therebetween. However, it is not always necessary to arrange the lines symmetrically. Further, the two tear guide lines may not be parallel as long as they do not intersect each other.

  The tear guide lines arranged in parallel in two rows must be shaped so that the tear line does not deviate inside the two tear guide lines, regardless of the direction from top to bottom or bottom to top. There is. For example, when perforation is performed on the base material layer, patterning as shown in FIGS. 6A to 6D and FIGS. 6F to 6I can be employed. When tearing from top to bottom, as shown in FIGS. 7A to 7D, and when tearing from bottom to top, it is torn as shown in FIGS. 8A to 8D. Thereby, it can open along a predetermined | prescribed opening line, suppressing the deviation of the broken line from a tear guide line.

  It is preferable that the tear guide wire is provided in at least one layer excluding the sealant layer. For example, the tear induction line can be formed by punching a base material layer with a die cut, a Thomson blade or the like, or ablation of the base material layer with carbon dioxide laser irradiation. If it is a continuous line like FIG.6 (e), it can respond to any direction by one, However, In order to perform such an easy opening process only to a base material layer, irradiation of a carbon dioxide laser Ablation of the substrate layer is required.

  FIG. 9 shows an example of laminated films 30, 30A and 30B provided with tear guide lines. In the laminated film 30 shown in FIG. 9A, a cut 31 a serving as a tear guide line passes through the base material layer 31. In the case of ablation of the base material layer, a cut 31b serving as a tear guide line can be formed inside the base material layer 31 as in a laminated film 30A shown in FIG. In the laminated film 30 </ b> B shown in FIG. 9C, an outer surface layer 33 made of another film or the like is formed on the base material layer 31.

  As a laminated film, a conventionally used film such as a biaxially stretched polypropylene, a biaxially stretched polyamide, a biaxially stretched polyester or the like is used as a base layer, and low density polyethylene, straight A laminate in which a polyolefin resin such as chain low density polyethylene, ethylene-vinyl acetate copolymer or polypropylene is laminated as a sealant layer is used. Examples of the method for producing the laminated film include a dry laminating method, an extrusion laminating method, and a coextrusion method. An adhesive, an anchor agent, or the like can be provided between the base material layer and the sealant layer in order to improve the adhesive strength. In this case, a plurality of base material layers may be laminated to increase the strength of the packaging bag. Alternatively, a metal foil such as an aluminum foil, a metal vapor-deposited layer, an inorganic vapor-deposited layer such as ceramic, an ethylene-vinyl alcohol copolymer film, or the like may be laminated in order to improve the barrier property against gas or ultraviolet rays.

  The distance between the pair of tear guide lines 24a and 24b provided on the side surface 23 of the pillow packaging bag can be arbitrarily set, but the breaking line starting from the opening trigger portion is formed on the side surface 23 of the pillow packaging bag. It is desirable to exist inside the position to reach. From this, the optimum position where the tear guide line is given is 1 mm or more inside each of the opposite ends 23a, 23b (see FIG. 1) of the side surface 23 of the pillow packaging bag, Considering the opening operability, it is preferable to set the interval to 5 to 10 mm. Here, the interval between the tear guide wires 24a and 24b and the side surface ends 23a and 23b is the interval between the front surface side tear guide wire 24a and the end 23a that forms the boundary between the side surface 23 and the front surface 22. In the side tear guide line 24 b, the distance between the side 23 and the end 23 b that forms the boundary between the back surface 21.

  Three or more tear guide lines may be formed on one side surface. It is preferable to have at least one tear guide line on the front side of the side surface and at least one tear guide line on the back side of the side surface. If the two tear guide lines are both biased toward the front side or the back side, the opening formed between them is difficult to increase. Each tear guide line is preferably a tear guide line that can be opened along the top-bottom direction regardless of whether the tear seal line starts from either the top seal part or the bottom seal part. When the opening trigger part is provided only on the top seal part, it may be a tear guide line capable of inducing tearing only from the top to the bottom, and when the opening trigger part is provided only on the bottom seal part, only from the bottom to the top. It may be a tear guide line capable of inducing tearing. When two or more tear guide lines are provided on the front side of one side surface or two or more tear guide lines are provided on the back side of one side surface, the direction of tearing caused by tearing is the same as the tear guide line on the front side. It is preferable that the shape does not deviate from the region between the tear guide line on the back surface side.

  FIG. 10A shows an example of a gusset type pillow packaging bag 10A. This pillow packaging bag 10A forms a back seal portion 11 by combining the left side edge 43 and the right side edge 44 of the film 40A from one film 40A developed as shown in FIG. The upper edge portion 41 and the lower edge portion 42 are folded into the shape shown in FIG. 10B to form the top seal portion 12 and the bottom seal portion 13, respectively. In a general gusset type packaging bag, the center line 25c of the side surface 23 is folded into a valley fold as viewed from the outside of the bag, but the valley fold is not necessarily required.

  FIG. 12A shows an example of a pillow packaging bag 10B without a gusset. This pillow wrapping bag 10B forms a back seal portion 11 by combining the left edge 43 and the right edge 44 of the film 40B from one film 40B developed as shown in FIG. The upper edge portion 41 and the lower edge portion 42 are folded into the shape shown in FIG. 12B, and the top seal portion 12 and the bottom seal portion 13 are formed, respectively.

In the pillow packaging bag of the present embodiment, it is preferable that the surfaces having the longest side and the shortest side are the side surfaces 23 and 23 with respect to the substantially rectangular parallelepiped contents. In this case, the longest side is the vertical (height) direction, the shortest side is the thickness direction, and the middle length side is the left-right direction.
In FIGS. 10-13, when accommodating the content of a substantially rectangular parallelepiped, the upper surface 15 and the lower surface 16 are formed in the bag by folding the back surface 21, the front surface 22, and the two side surfaces 23, 23, respectively. Show.

Both ends 23a and 23b of the side surface 23 can be formed by, for example, fold lines. When the shape of the pillow packaging bag is formed in accordance with the shape of the contents, the width of the side surface 23 (interval between both ends 23a and 23b) corresponds to the thickness of the contents.
The positions of both ends 23a, 23b of the side surface 23 may be determined by making a crease before contacting the laminated film with the contents, or may be a result of the laminated film being bent by the contact with the contents. In order for the breaking lines 25a and 25b (see FIG. 2) to extend beyond the side surface ends 23a and 23b, it is desirable that the side surface ends 23a and 23b have no seal portion.
As shown in FIG. 1, it is preferable that the front tearing guide line 24a is disposed between the end 23a of the side face 23 on the front face 22 side and the center line 25c. It is preferable that the tear guide wire 24b on the back surface side is disposed between the end 23b of the side surface 23 on the back surface 21 side and the center line 25c.

FIGS. 14A to 14D are plan views illustrating patterns of tear guide lines. The portions to be the upper surface 15 and the lower surface 16 of the bag are outside the range in the height direction of the contents. Therefore, if the tear guide line is formed at least in the range in the height direction of the contents, a large opening suitable for removal can be obtained.
In FIG. 14A, the upper ends of the tear guide lines 24a and 24b reach the upper edge 41 of the film, and the lower ends of the tear guide lines 24a and 24b reach the lower edge 42 of the film.
In FIG. 14B, the tear guide lines 24 a and 24 b are formed only on a part of the side surface 23 in the vertical direction without reaching the upper surface 15 and the lower surface 16.
In FIG. 14 (c), the tear guide lines 24 a and 24 b are inclined inward toward the center line 25 c of the side surface 23 at portions that become the upper surface 15 and the lower surface 16 of the bag.
In FIG. 14 (d), the tear guide lines 24 a and 24 b are inclined outward toward both ends 23 a and 23 b of the side surface 23 in the portions that become the upper surface 15 and the lower surface 16 of the bag.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used when the contents mainly having a thickness such as a PTP sheet are packaged in a bundle.

DESCRIPTION OF SYMBOLS 10,10A, 10B, 100 ... Pillow packaging bag, 11 ... Back seal part, 12 ... Top seal part, 13 ... Bottom seal part, 14 ... Contents storage part, 21 ... Back surface, 22 ... Front surface, 23 ... Side surface, 24 , 24a, 24b ... tearing induction wire, 25a, 25b ... breaking line, 26 ... opening, 27 ... contents, 30, 30A, 30B ... laminated film, 31 ... base material layer, 32 ... sealant layer, 33 ... outer surface layer 40A, 40B ... film, 41 ... upper edge, 42 ... lower edge, 43 ... left edge, 44 ... right edge.

Claims (5)

A back seal comprising a multilayer film having a multilayer structure having at least a base material layer and a heat sealable sealant on the inner surface, and heat-sealing the sealant layer at the left edge and the right edge of the laminate film together A pillow packaging bag in which a portion is formed on the back side and a content storage portion is provided by a top seal portion heat-sealed at the upper edge and a bottom seal portion heat-sealed at the lower edge,
A back surface that is a surface on which the back seal portion is formed, a front surface that is a surface facing the back surface, and two side surfaces that are surfaces formed between the front surface and the back surface;
At least one tear on the front side of the side surface as a tear guide line that can be opened along the vertical direction regardless of whether the top seal portion or the bottom seal portion starts to tear on at least one of the two side surfaces. and guidewire, possess at least one tear guiding line on the back side surface, the tearing guide lines, respectively provided only on the inner side than 1mm than side ends of the pillow packaging bag, sealed to the side ends An easy-open pillow packaging bag characterized by having no part .   The easy-opening property according to claim 1, wherein the tear guide line is composed of two or more tear guide lines on the front side of the side surface and two or more tear guide lines on the back side of the side surface. Pillow packaging bag. The tear guide line is capable of correcting a deviation in the breaking direction due to tearing, and has a shape that does not deviate to a region between the tear guide line on the front side and the tear guide line on the back side. Item 3. The easy-open pillow packaging bag according to item 1 or 2 . The easy-open pillow packaging bag according to any one of claims 1 to 3 , wherein the tear guide wire is provided in at least one layer excluding a sealant layer. The easy-open property according to any one of claims 1 to 4 , wherein the tear guide line is formed by punching a base material layer or by ablation of the base material layer by carbon dioxide laser irradiation. Pillow packaging bag.

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