JP7011922B2 - Packaging bag - Google Patents

Description

The present invention relates to a packaging bag. In particular, the present invention relates to a packaging bag containing a PTP (press-through package) packaging sheet for packaging pharmaceuticals, confectionery, and the like.

Various types of packaging bags are known as packaging bags made of film. Among them, the gusset type packaging bag is used in various fields because it can be packed compactly and efficiently. Gazette-type packaging bags are generally torn from the notch provided at the end to open the side surface, but in recent years, the back or front can be opened and the contents can be taken out. Easy packaging bags are known (Patent Documents 1 and 2).

However, the gusset-type packaging bag whose back or front is opened as described above may not be easily opened.

Japanese Unexamined Patent Publication No. 2008-10571 Japanese Unexamined Patent Publication No. 2014-234236

The present invention has been made to solve the above-mentioned conventional problems, and a main object thereof is to provide a packaging bag which can be easily opened and whose contents can be easily taken out after opening. Further, an object of the present invention is to provide a packaging bag in which the contents are prevented from popping out at the time of opening.

In the packaging bag of the present invention, the front surface and the back surface facing each other, the first side surface and the second side surface formed between the front surface and the back surface and facing each other, and the front surface and the back surface are sealed. A packaging bag comprising a sealing portion formed along each of both ends facing each other and a back sealing portion formed on the back surface so as to extend from one end to the other end of the both ends. It has a first opening auxiliary line and a second opening auxiliary line extending from one end toward the other end, which guides a rift so as to form an opening on the front surface when the seal portion at one end is torn. The first opening auxiliary line extends from the sealing portion at one end of the back surface, straddles the boundary between the back surface and the first side surface, and at least a part thereof is the boundary between the front surface and the first side surface. The second opening auxiliary line extends from the sealing portion at one end of the front surface, and at least a part thereof is formed along the boundary between the front surface and the second side surface.
In one embodiment, the first opening auxiliary line is directed from the first end point between the back seal portion and the first side surface in the seal portion at one end of the back surface toward the other end. The first upper end lateral line extending along the boundary between the front surface and the first side surface, the first lower end lateral line extending to the seal portion at the other end, and the other of the first upper end lateral line portion. It has a first inclined line portion that connects the end portion on the end side and the end portion on the one end side of the first lower end lateral line portion and straddles the boundary between the back surface and the first side surface portion. The second opening auxiliary line includes a second upper end lateral line portion extending from the second end point at a position corresponding to the first end point on the front surface toward the other end, and the front surface and the second end point. The second lower end lateral line portion extending along the boundary with the side surface to the seal portion at the other end, the other end side end portion of the second upper end lateral line portion, and the one end side of the second lower end lateral line portion. It has a second inclined line portion connecting to the end portion of the above.
In one embodiment, the first lower end lateral line portion and the second lower end lateral line portion extend in a direction parallel to each other.
In one embodiment, the first lower end lateral line portion is formed on the front side along the boundary between the front surface and the first side surface.
In one embodiment, the second lower end lateral line portion is formed on the front side along the boundary between the front surface and the second side surface.
In one embodiment, a notch for opening is provided only in the seal portion at one end of the seal portion at one end and the seal portion at the other end.

According to the present invention, it is possible to provide a packaging bag that can be easily opened and the contents can be easily taken out after opening.

It is a schematic perspective view when the packaging bag by one Embodiment of this invention is seen from the front side. It is a schematic plan view when the packaging bag by one Embodiment of this invention is seen from the back side. It is a schematic side view when the packaging bag by one Embodiment of this invention is seen from the 1st side surface side. It is a schematic perspective view when the state after opening of the packaging bag by one Embodiment of this invention is seen from the front side.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 4.

FIG. 1 is a schematic perspective view of the packaging bag 100 according to one embodiment of the present invention when viewed from the front side 20, and FIG. 2 is a schematic perspective view of the packaging bag 100 according to one embodiment of the present invention as viewed from the back surface 21 side. It is a schematic perspective view of the time, and FIG. 3 is a schematic side view of the packaging bag 100 according to one embodiment of the present invention when viewed from the first side surface 22 side. The packaging bag 100 has a front surface 20 and a back surface 21 facing each other, and a first side surface 22 and a second side surface 23 formed between the front surface 20 and the back surface 21 and facing each other. The packaging bag 100 is a so-called gusset type packaging bag. In the following, for the sake of explanation, the boundary between the front surface 20 and the first side surface 22 is defined as the boundary 22a, the boundary between the back surface 21 and the first side surface 22 is defined as the boundary 22b, and the boundary between the front surface 20 and the second side surface 23. Is the boundary 23a, and the boundary between the back surface 21 and the second side surface 23 is the boundary 23b.

The packaging bag 100 includes a first seal portion 11 and a second seal portion 12 formed by sealing the front surface 20 and the back surface 21, and a back seal portion 13 (back sticker) formed on the back surface. Has. The first seal portion 11 is formed along one end 11a of both ends facing each other, and the second seal portion 12 is formed along the other end 12a. The back seal portion 13 is formed on the back surface 21 so as to extend from one end 11a to the other end 12a. Typically, the back seal portion 13 is formed near the center of the back surface 21 and is folded toward the second side surface 23 so as to be in contact with the back surface 21 (so as to be substantially parallel to the back surface 21).

The packaging bag 100 has a first opening auxiliary line 30 and a second opening auxiliary line 40 extending from one end 11a to the other end 12a. The first opening auxiliary line 30 and the second opening auxiliary line 40 guide a rift so as to form an opening on the front surface 20 when the packaging bag 100 is torn from the first sealing portion 11. Typically, the first opening auxiliary line 30 and the second opening auxiliary line 40 can advance a rift along the shape thereof. The first opening auxiliary line 30 extends from the first sealing portion 11 of the back surface 21 and straddles the boundary 22b, and at least a part thereof is formed along the boundary 22a. The second opening auxiliary line 40 extends from the first sealing portion 11 of the front surface 20, and at least a part thereof is formed along the boundary 23a.

The first opening auxiliary line 30 and the second opening auxiliary line 40 may be composed of any appropriate number of opening auxiliary lines extending in a direction parallel to each other. Preferably, the first opening auxiliary line 30 and the second opening auxiliary line 40 are each composed of a plurality of opening auxiliary lines. In this case, the distance between the adjacent opening auxiliary lines is not particularly limited, and can be appropriately set according to the size of the packaging bag 100. In the illustrated example, the first opening auxiliary line 30 and the second opening auxiliary line 40 are each composed of three opening auxiliary lines extending in parallel directions with each other. In the figure, for the sake of explanation, as the opening auxiliary line constituting the first opening auxiliary line 30, the opening auxiliary line 30a, the opening auxiliary line 30b, and the opening auxiliary line 30c are used in order from the first side surface 22 side on the front surface 20. In the figure, as the opening auxiliary line constituting the opening auxiliary line 40, the opening auxiliary line 40a, the opening auxiliary line 40b, and the opening auxiliary line 40c are shown in order from the second side surface 23 side. As shown in the illustrated example, the first opening auxiliary line 30 (second opening auxiliary line 40) is composed of three opening auxiliary lines. Therefore, for example, the opening auxiliary line 30c (opening auxiliary line 40c) at the time of opening. Even if the rift that has progressed along the line is derailed due to interference of the contents, it is guided by another opening auxiliary line 30b (opening auxiliary line 40b) and opening auxiliary line 30a (opening auxiliary line 40a). It can be fixed.

The first opening auxiliary line 30 typically includes a first upper end side line portion 31, a first inclined line portion 32, and a first lower end side line portion 33. The first upper end side line portion 31 is a portion extending from the first end point 30d between the back seal portion 13 and the first side surface 22 toward the other end 12a in the first seal portion 11 of the back surface 21. be. The first lower end side line portion 33 is a portion extending along the boundary 22a to the second sealing portion 12. The first inclined line portion 32 is a portion that connects the end portion of the first upper end lateral line portion 31 on the other end 12a side and the end portion of the first lower end lateral line portion 33 on the one end 11a side and straddles the boundary 22b. be. The second opening auxiliary line 40 typically includes a second upper end side line portion 41, a second inclined line portion 42, and a second lower end side line portion 43. The second upper end lateral line portion 41 is directed from the second end point 40d at the position corresponding to the first end point 30d (typically on the opposite side of the first end point 30d) to the other end 12a on the front surface 20. It is a part that extends. The second lower end lateral line portion 43 is a portion extending along the boundary 23a to the second sealing portion 12. The second inclined line portion 42 is a portion that connects the end portion of the second upper end lateral line portion 41 on the other end 12a side and the end portion of the second lower end lateral line portion 43 on the one end 11a side. Typically, the first lower end side line portion 33 and the second lower end side line portion 43 extend in a direction parallel to each other. The length of the first upper end side line portion 31, the first inclined line portion 32, the first lower end side line portion 33, the second upper end side line portion 41, the second inclined line portion 42, and the second lower end side line portion 43. The sill can be set to any suitable length depending on the size and application of the packaging bag 100. FIGS. 1 to 3 show, as an example, a case where the first opening auxiliary line 30 and the second opening auxiliary line 40 are straight lines, but the first opening auxiliary line 30 and the second opening auxiliary line 30 are shown. The shape of the line 40 is not limited to the linear shape. At least one of the first upper end side line portion 31, the first inclined line portion 32, the first lower end side line portion 33, the second upper end side line portion 41, the second inclined line portion 42, and the second lower end side line portion 43. Any shape may be another shape such as a broken line, a dotted line, or a wavy line.

FIG. 4 is a schematic perspective view of the state after opening of the packaging bag 100 according to one embodiment of the present invention when viewed from the front surface 20 side. The packaging bag 100 is torn from the first end point 30d and the second end point 40d of the first sealing portion 11, so that the rift is guided by the first opening auxiliary line 30 and the second opening auxiliary line 40, and the front surface thereof. A portion of 20 may be removed, resulting in the formation of an opening 50 on the front surface 20 as shown in FIG. As a result, the content 60 can be taken out from the opening 50.

The packaging bags of Patent Documents 1 and 2 described above can be opened on the back surface or the front surface, but neither of them may be easily opened. Specifically, the packaging bag of Patent Document 1 has two cut lines with a back sticking portion (back seal portion) sandwiched between them, and the back sticking portion starts from a notch provided in the back sticking portion. A part of the back surface is opened by tearing the part, but it requires a troublesome procedure of grasping the back-pasted part that is folded so as to be in contact with the back surface. Further, in the packaging bag of Patent Document 2, the front side film is torn at the end portion where the front side film and the back side film are sealed, starting from the two notches provided only in the front side film. However, it requires a troublesome procedure of grasping only the front side film from the state where the back side film and the front side film are overlapped at the end portion. On the other hand, in the packaging bag 100, the opening 50 can be formed on the front surface 20 by a simple and general opening procedure of tearing from one end 11a (first sealing portion 11), and the contents 60 can be easily taken out.

As shown in FIG. 4, in the package bag 100 after opening, a part of the front surface 20 is not removed between the cut end formed along the second inclined line portion 42 and the first sealing portion 11. Remain in. This can prevent the contents 60 from popping out of the packaging bag 100 due to the momentum at the time of opening.

The first lower end side line portion 33 may be formed in the vicinity of the boundary 22a along the boundary 22a, may be formed on the front surface 20 side, or may be formed on the first side surface 22 side. good. The second lower end side line portion 43 may be formed in the vicinity of the boundary 23a along the boundary 23a, may be formed on the front surface 20 side, or may be formed on the second side surface 23 side. good. The distance between the boundary 22a and the first lower end side line portion 33 and the distance between the boundary 23a and the second lower end side line portion 43 are, for example, the width of the front surface 20 (the distance between the opposing side surfaces). It can be 1/50 to 1/5, preferably 1/50 to 1/20 of the width of the front surface 20. In one embodiment, as shown in FIG. 1, the first lower end side line portion 33 is formed on the front surface 20 side along the boundary 22a, and the second lower end side line portion 43 is formed on the front surface 20 side along the boundary 23a. It is formed on the side. That is, the first lower end side line portion 33 is formed in the vicinity of the boundary 22a on the front surface 20, and the second lower end side line portion 43 is formed in the vicinity of the boundary 23a on the front surface 20. As a result, in the packaged bag 100 after opening, a part of the front surface 20 remains without being removed along the boundary 22a and the boundary 23a, and the contents 60 can be prevented from popping out from the packaging bag 100 with the momentum at the time of opening.

Preferably, of the first seal portion 11 and the second seal portion 12, only the first seal portion 11 is provided with a notch for opening. This can prevent accidental tearing from the second seal portion 12. In one embodiment, the opening notch is a serrated or corrugated shape formed at the end of the first sealing portion 11. In another embodiment, the opening notch is formed in any suitable shape, such as a V or I, formed at the first endpoint 30d and the second endpoint 40d of the first seal portion 11. It is a notch of.

The packaging bag 100 of the illustrated example can be typically obtained by folding one film into a bag shape and sealing the ends in a state where the films are stacked. Specifically, a set of sides of a rectangular film is overlapped and sealed to form a spine sealing portion 13, and one side of the two sides orthogonal to the above set of sides of the film is sealed to form a thirth. The packaging bag 100 can be obtained by forming the sealing portion 11 of 1 and sealing the other side to form the second sealing portion 12.

The film typically has a base film that is the outermost layer of the film and a functional layer laminated on the base film depending on the intended use. As the base film, a resin film such as polyester-based, polyamide-based, polypropylene-based, polycarbonate-based, or cellophane can be used. Preferably, a stretched film obtained by biaxially stretching these resin films is used.

Examples of the functional layer include a barrier layer and a fusion layer. For the barrier layer, for example, an inorganic substance such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, and zirconium oxide is vapor-deposited on the base film, or a metal foil such as aluminum is bonded to the base film. Can be formed by By using the film having the barrier layer as the film constituting the packaging bag, gas barrier property, water vapor barrier property, mechanical strength, bending resistance, puncture resistance, impact resistance, abrasion resistance, cold resistance, It can improve heat resistance, chemical resistance, light shielding property, etc., and prevent deterioration of the contents. The fused layer is, for example, high-pressure low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-. Representative of acrylic acid copolymer, ethylene-acrylic acid ester copolymer, ethylene-methacrylic acid copolymer (EMMA), ethylene-vinyl alcohol copolymer (EVOH), polyacrylonitrile (PAN), polyethylene terephthalate (PET). It can be formed by applying a resin material such as polyethylene to be obtained, or by adhering and laminating a resin film made of these resin materials. By providing such a fused layer as the innermost layer, the end portion of the film can be sealed by heat sealing.

The first opening auxiliary line 30 and the second opening auxiliary line 40 may be a portion thinner than the other portions of the film. Such an opening auxiliary line is typically formed by half-cutting the film by laser irradiation (for example, carbon dioxide laser irradiation).

The packaging bag of the present invention is suitably used as a packaging bag for accommodating a PTP packaging sheet for packaging pharmaceuticals, confectionery, and the like.

11 First seal portion 12 Second seal portion 13 Back seal portion 20 Front surface 21 Back surface 22 First side surface 23 Second side surface 30 First opening auxiliary line 31 First upper end side line portion 32 First inclined line Part 33 First lower end side line part 40 Second opening auxiliary line 41 Second upper end side line part 42 Second inclined line part 43 Second lower end side line part 100 Packaging bag

Claims (4)

A front surface and a back surface facing each other, and a first side surface and a second side surface formed between the front surface and the back surface and facing each other.
A seal portion formed along each of both ends facing each other by sealing the front surface and the back surface, and a back seal portion formed on the back surface so as to extend from one end to the other end of both ends.
It is a packaging bag with
It has a first opening auxiliary line and a second opening auxiliary line extending from one end toward the other end, which guides a rift so as to form an opening on the front surface when the seal portion at one end is torn. death,
The first opening auxiliary line extends from the sealing portion at one end of the back surface, straddles the boundary between the back surface and the first side surface, and at least a part thereof is at the boundary between the front surface and the first side surface. It has a first lower end lateral line that is formed along and extends along the boundary between the front surface and the first side surface to the seal at the other end.
The first lower end lateral line portion is formed on the front surface side along the boundary between the front surface and the first side surface.
The second opening auxiliary line extends from the sealing portion at one end of the front surface, and at least a part thereof is formed along the boundary between the front surface and the second side surface, and the front surface and the second side surface are formed . It has a second lower end lateral line portion that extends along the boundary with and to the seal portion at the other end.
The second lower end lateral line portion is formed on the front surface side along the boundary between the front surface and the second side surface.
Packaging bag. The first opening auxiliary line is a first upper end lateral line extending from a first end point between the back seal portion and the first side surface toward the other end in the seal portion at one end of the back surface. The first lower end lateral line portion, the other end side end portion of the first upper end lateral line portion, and the one end side end portion of the first lower end lateral line portion are connected to the back surface. It has a first inclined line portion that straddles the boundary with the first side surface, and has.
The second opening auxiliary line includes a second upper end lateral line portion extending from the second endpoint located at a position corresponding to the first endpoint on the front surface toward the other end, and the second lower end lateral line portion. 1. The second inclined line portion connecting the end portion of the second upper end lateral line portion on the other end side and the end portion of the second lower end lateral line portion on the one end side is provided. The packaging bag described in. The packaging bag according to claim 1 or 2 , wherein the first lower end lateral line portion and the second lower end lateral line portion extend in a direction parallel to each other. The packaging bag according to any one of claims 1 to 3 , wherein an opening notch is provided only in the seal portion at one end and the seal portion at the other end.

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