JP4439629B2 - Packaging bag - Google Patents

Description

【００６２】
表１に示した結果から明らかな通り、実施例１〜５の本発明の包装用袋体は、第一弱め線を第二弱め線に対して垂直方向にずらして配置しているので、開封後において開封口部につまみ部分が突出するように形成され、指先でこのつまみ部分をつまむことができ、開封口を容易に開閉できることが確認された。
【００６３】
特に、第一弱め線と第二弱め線との間隔をそれぞれ３ｍｍ，５ｍｍ、第一弱め線と第二弱め線を構成する弱め線をそれぞれ２本，３本とした本発明の好適な実施形態に対応する実施例１，２に示す包装用袋体は、開封口を容易に開閉できるとともに引き裂き線がきれいに形成されるので開封口の美観もよい事が確認された。
【００６４】
【発明の効果】
以上説明したように本発明の包装用袋体によれば、第一弱め線と第二弱め線とのずれの部分に基づき開封後の包装用袋体の開封口において適度なつまみ部分が形成されることとなり、このつまみ部分を容易に指先でつまむことが可能となるので、開封作業が容易で、かつ開封後の開封口の開閉作業も容易に行うことのできる包装用袋体を提供することが可能となる。
【図面の簡単な説明】
【図１】本発明の包装用袋体の好適な一実施形態を示す正面図である。
【図２】図１に示す包装用袋体の展開図である。
【図３】図１に示す包装用袋体の各弱め線の方向に対して垂直な方向から見た場合の拡大概略断面図である。
【図４】図１に示す包装用袋体を開封する際に第一弱め線と第二弱め線の部分に形成される実際の切り取り線（引き裂き線）を示す模式図である。
【図５】図１に示す包装用袋体の開封後の状態を示す正面図である。
【図６】図５に示す開封後の包装用袋体の展開図である。
【図７】本発明の包装用袋体の第二の実施形態を示す展開図である。
【図８】本発明の包装用袋体の第三の実施形態を示す模式断面図である。
【図９】（ａ）〜（ｂ）はそれぞれ従来の包装用袋体の開封前の状態を示す正面図及びその展開図である。
【図１０】（ａ）〜（ｂ）はそれぞれ従来の包装用袋体の開封後の状態を示す正面図及びその展開図である。
【符号の説明】
１０…包装用袋体、１０Ａ…包装用袋体の第一面、１０Ｂ…包装用袋体の第二面、１０ａ…包装用袋体の第一面１０Ａのシール部分、１０ｂ…包装用袋体の第二面１０Ｂのシール部分、１２…弱め線の形成された紙、１４…プラスチックフィルム（密閉層）、１６…アルミニウム箔（密閉層）、１８…複合包装材、２０…第一弱め線（変形ミシン目加工の場合）、２２〜２６…第一弱め線を構成する弱め線の列、３０…第二弱め線（変形ミシン目加工の場合）、３２〜３６…第二弱め線を構成する弱め線の列、４０…プラスチックファスナー（シール手段）、４０ａ…プラスチックファスナーのオス部、４０ｂ…プラスチックファスナーのメス部、５０…ノッチ（切り込み）、６０…開封口、７０…開封後にできるつまみ部分、Ｌ₂₀…開封時に第一弱め線の部位にできる引き裂き線、Ｌ₃₀…開封時に第二弱め線の部位にできる引き裂き線、Ｌ₅₀…包装用袋体の引き裂き方向、Ｓ₅₀…包装用袋体の引き裂き開始方向、Ｘ…包装用袋体を展開する際の中心軸、Ｗ₁…弱め線の切れ目の幅、Ｗ₂…弱め線の継ぎ目の幅、Ｗ₃…第一弱め線または第二弱め線を構成する各弱め線間の間隔、Ｗ_20-30…第一弱め線の第二弱め線側の縁と第二弱め線の第一弱め線側の縁との間隔、Ｗ_40A…プラスチックファスナーのオス部の幅、Ｗ_40B…プラスチックファスナーのメス部の幅、１００…従来の包装用袋体、１００Ａ…従来の包装用袋体１００の第一面、１００Ｂ…従来の包装用袋体１００の第二面、２００…従来の包装用袋体１００の第一弱め線（ミシン目加工の場合）、３００…従来の包装用袋体１００の第二弱め線（ミシン目加工の場合）、４００…開封口、５００…開封後の第二弱め線２００に沿った縁部分、６００…開封後の第二弱め線３００に沿った縁部分。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging bag having a weakening line for opening.
[0002]
[Prior art]
Conventionally, a packaging bag as shown in a front view of FIG. 9A and a developed view of FIG. 9B is known. In order to facilitate the opening operation, the packaging bag body 100 is provided on a pair of opposing surfaces of the bag body 100 with a perforated or deformed perforated weakening line (hereinafter referred to as one surface 100A facing each other). The weak line is referred to as “first weak line 200”, and the weak line provided on the other surface 100B is referred to as “second weak line 300”). For example, Utility Model Registration No. 2566444 discloses a packaging bag provided with a modified perforated weak line.
[0003]
[Problems to be solved by the invention]
However, the conventional packaging bag body 100 as shown in FIGS. 9A and 9B can be easily opened by tearing from the first weakening line 200 and the second weakening line 300. On the other hand, as shown in FIG. 10 (a), the opening 100 of the bag body 100 that is formed after opening is easy to close, and the opening 400 can be quickly opened when necessary to open the cover 100 in the bag 100. There is a problem that it is difficult to take out the package easily.
[0004]
The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a packaging bag body that can be easily opened and that can be easily opened and closed after opening. And
[0005]
[Means for Solving the Problems]
As a result of intensive research to achieve the above object, the present inventors have found that the cause of the above problem is that the conventional packaging bag body 100 is a bag formed after opening as shown in a developed view in FIG. In the opening 400 of the body 100, since the edge portion 500 along the first weakening line 200 and the edge portion 600 along the second weakening line 300 forming the opening 400 are easy to adhere to each other, the opening 400 However, it has been found that the fact that it cannot be easily pinched with a fingertip once it has been closed is greatly affected. In order to solve this problem, a portion that can be pinched with a finger (hereinafter referred to as a “knob portion”) is formed in the opening that is formed after the opening, and the knob portion is used even after the opening of the opening is closed. And found that the opening can be easily opened.
[0006]
That is, the packaging bag of the present invention is for packaging having a first weakening line for opening provided on one of a pair of opposing surfaces and a second weakening line for opening provided on the other surface. The bag body is characterized in that the first weakening line is arranged with a deviation in a direction perpendicular to the second weakening line with respect to the second weakening line.
[0007]
As described above, the first weakening line and the second weakening line are arranged so as to have a deviation, so that the opening portion after opening the edge portion along the first weakening line or the second weakening line based on the deviation portion. One of the edge portions along the line projects to form a knob portion, and the opening can be easily opened and closed using this knob portion.
[0008]
Here, the “weak line” is formed by subjecting the packaging material forming the packaging bag body to a linear or perforated cut, etc., so that it can be easily packaged without using a blade. A bag that can be opened by tearing the bag. In addition, the linear cut process is a process in which a linear groove is continuously applied to the packaging material while leaving a slight thickness. The perforated cut process is a process in which a slit or groove is formed on the packaging material. It is applied continuously at intervals.
[0009]
In the following description, the surface on which the first weakening line is provided is referred to as “first surface”, and the surface on which the second weakening line is provided is referred to as “second surface”. Further, the state that “the first weakening line is arranged with a deviation in the vertical direction of the second weakening line with respect to the second weakening line” means that the packaging bag body is the first surface and the second surface. When the first weak line on the first surface is translated on the second surface in the normal direction, the first weak line and the second weak line are on the second surface. A state in which there is a shift without overlapping is shown. In addition, for the above-mentioned weak line, the edge of the cut that can actually be formed on the first surface and the second surface when the packaging bag is torn during the opening operation is described as the “tear line” in the following description. And
[0010]
As described above, the first weakening line and the second weakening line are arranged so that there is a shift and the knob part after opening is formed, so that a special knob part is formed in advance and in the vicinity of the assumed opening. There is no need to attach it.
[0011]
Moreover, in the packaging bag body of this invention, the space | interval of the edge by the side of the 2nd weakening line side of the 1st weakening line and the edge by the side of the 1st weakening line side of the 2nd weakening line is 1-10 mm. preferable. Thereby, the area of the knob part formed in the opening after opening is sufficiently secured, and it becomes possible to pinch with fingers more easily.
[0012]
In the packaging bag of the present invention, the first weakening line and the second weakening line are preferably deformed perforations. By making the weakening line into such a shape, an actual tear line formed along the weakening line is formed in a desired direction at the time of opening as will be described later. In particular, when the first weakening line and the second weakening line are misaligned as in the present invention, the above-mentioned tear line is displaced from the desired tearing direction due to the force applied to the weakening line part during tearing. It is effective in preventing it.
[0013]
Here, the “deformed perforated shape” means that a cut having a substantially C shape, a substantially Y shape, a substantially U shape, a substantially arc shape or the like as described in Utility Model Registration No. 2566444 is a predetermined shape. Those formed continuously at intervals will be shown. For example, a substantially C-shaped cut is formed by inclining a pair of two perforated cuts so as to form a substantially C-shape, and is generally a substantially C-shaped cut with respect to a desired tearing direction. It is formed continuously at a predetermined interval with the expanded side facing. By doing this, the actual tear line that enters from the side where the substantially C-shaped cut is widened comes out from the side where the cut is narrowed, and is controlled so as to converge in the desired tear direction. It becomes. It should be noted that the side where the broad section of the substantially letter C is widened is used for the explanation after the “tear side”.
[0014]
Moreover, in the packaging bag body of this invention, it is preferable that the 1st weakening line and the 2nd weakening line are each formed as the aggregate | assembly which consists of 1-10 weakening lines. By doing so, the tear line is surely formed in the desired tear direction without being displaced from the desired tear direction by the force applied to the weakened line part at the time of tearing, and the knob part after opening is sufficiently secured Will be. In this case, the distance between the edge of the first weakening line on the second weakening line side and the edge of the second weakening line on the first weakening line side is the weakening line constituting the first weakening line. The distance between the line formed closest to the second weakening line and the line formed closest to the first weakening line among the weakening lines constituting the second weakening line is indicated. This shall be described in the following description as “the interval between the first weakening line and the second weakening line”.
[0015]
The packaging bag of the present invention is formed at the end of the first weakening line, the end of the second weakening line, or the portion between the end of the first weakening line and the end of the second weakening line. It is preferable to further include a cut for opening. By providing the cuts in this way, the opening operation can be started more smoothly, and the packaging bag body can be torn and opened by reliably using the weak line part without tearing the part other than the weak line. Will be able to.
[0016]
The packaging bag of the present invention is composed of at least one hermetic layer that stably holds the packaged object in an airtight state and at least one layer having a first weakening line and / or a second weakening line. It is preferable that the composite packaging material is formed. By forming the packaging bag body from the composite packaging material having a laminated structure in this way, the strength of the packaging bag body can be increased, and each layer according to the conditions for storing the packaged item in the bag body The material can be selected. Further, the packaged item can be kept in a desired sealed storage state before opening by the sealing layer. This includes products containing volatile constituents such as pharmaceuticals and foods as packaging materials, products whose quality greatly depends on the moisture content, and quality degradation easily occurs due to oxidation reaction with oxygen in the air. This is particularly effective when things are selected. Here, the “sealing layer” refers to a layer made of a material that can store the packaged object in an airtight state, and more preferably has a chemically stable surface or a chemically stable surface with respect to the packaged object. It is a surface-treated layer that has almost no adsorptivity and permeability to the components of the package, and almost no permeability to external air components and moisture. The layer which can hold | maintain the to-be packaged object stably in the substantially initial state is shown.
[0017]
In the packaging bag of the present invention, the sealing layer is preferably an aluminum layer. Aluminum foil is suitable as a sealing layer because it is airtight and chemically stable due to an oxide film on the surface, and is lightweight and easy to tear. Especially for poultices containing a large amount of volatile components, aluminum foil and gas barrier materials that do not allow the volatile components to permeate as sheet-like constituent materials, and acrylonitrile films that do not adsorb volatile components Alternatively, it is desirable to use a laminated material containing these in the layer structure.
[0018]
Moreover, it is preferable that the packaging bag of this invention is further equipped with the sealing means which seals the opening opening after opening. As a result, even after opening, the opening can be completely closed again, and an unused packaged item can be held in a sealed state. Here, “sealing means” refers to a member for sealing an opening such as a plastic fastener.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the packaging bags and parts thereof in the figures are all shown with the side where the opening is formed upward.
[0020]
FIG. 1 shows a front view of a preferred embodiment of the packaging bag of the present invention, and FIG. 2 shows a development view when the packaging bag of FIG. 1 is viewed from the outer surface side. FIG. 3 shows an enlarged schematic cross-sectional view of the packaging bag of FIG.
[0021]
As shown in FIGS. 1 and 2, the packaging bag body 10 of the present embodiment is a four-sided seal in which two composite packaging materials 18 having a rectangular laminated structure are overlapped and each outer edge portion is sealed by crimping or the like. It has the form. Further, a first weakening line 20 for opening is formed on the upper side of the first surface 10A of the packaging bag body 10 in parallel with the short side direction of the first surface 10A. On the other hand, the second weakening line 30 for unsealing also on the second surface 10B is parallel to the first weakening line 20 and further on the upper portion side of the packaging bag body 10 with respect to the first weakening line 20 at a predetermined interval W. _20-30 It is formed with a gap.
[0022]
The first weakening line 20 is an aggregate in which three weakening lines 22, 24, and 26 having a substantially C-shaped deformation perforation are formed in parallel from above. The second weakening line 30 is also an assembly in which three weakening lines 32, 34, and 36 each having a substantially C-shaped deformation perforation are formed in parallel from below. These weakening lines 22 to 26 and 32 to 36 are, as described above, the tearing direction L so that the tearing line enters from the tearing side of the substantially C-shaped cut. ₅₀ Are arranged along. Then, among these weakening lines, the opening operation is smoothly started at the tear-side end of the weakening line 22 formed at the position closest to the second weakening line 30 among the first weakening lines 20. A notch 50 (notch) is formed to penetrate from the first surface 10A to the second surface 10B. Further, a plastic fastener 40 (sealing means) for opening and closing the opening formed after opening is provided in the packaging bag body 10 in parallel to the first weakening line 20 and below the first weakening line 20. ing.
[0023]
The interval W between the first weakening line 20 and the second weakening line 30 _20-30 Are formed at a position closest to the second weakening line 20 in the first weakening line 20 and at a position closest to the first weakening line 20 in the second weakening line 30. It is assumed that the distance between each center axis and the weakening line 32 is shown. At the time of opening, the actual tear line is formed in the areas of the first weakening line 20 and the second weakening line 30 to form an opening.
[0024]
Details of each component will be described below with reference to FIGS.
[0025]
As shown in FIG. 3, the composite packaging material 18 forming the packaging bag 10 includes a paper 12 as a layer in which a weak line is formed from the outer side to the inner side, and a plastic film as a sealing layer in which no weak line is formed. 14, a composite laminate film 18 having a four-layer structure in which an aluminum foil 16 and a plastic film 14 are laminated is used. Here, as described above, aluminum foil is preferably used as one of the sealing layers because it is lightweight and easy to tear, and is excellent in airtightness and chemical stability. The composite laminate film 18 can be manufactured using a known manufacturing method such as a dry lamination method, a wet lamination method, a hot melt lamination method, and an extrusion lamination method. In addition, when the cut line of the weak line is formed with a slight thickness without penetrating the layer where the weak line is formed, the weak line may also be formed in the sealing layer.
[0026]
Further, the constituent material of each layer of the composite packaging material 18 is not particularly limited, and paper, nonwoven fabric, aluminum, cellophane, nylon, polyester, polypropylene, polyvinyl chloride, polyamide, polyacrylonitrile, It can be appropriately selected from olefin, polyvinylidene chloride, polyvinyl alcohol, ethylene vinyl acetate copolymer, polycarbonate, polystyrene, ethylene vinyl alcohol copolymer, ethylene acrylic copolymer, and the like. . Furthermore, what applied printing ink, the adhesive agent, etc. to these, or what provided the thin film by methods, such as vapor deposition or sputtering, may be used. As the thin film, in addition to a metal such as aluminum, a thin film having high gas barrier properties and transparency such as silicon oxide, magnesium oxide, and aluminum oxide is suitable. In any case, as the sheet-like constituent material, a material having sufficient flexibility as a packaging bag is desirable.
[0027]
As shown in FIGS. 2 and 3, the first weakening line 20 and the second weakening line 30 have a predetermined distance W between the first surface 10A and the second surface 10B. _20-30 Are arranged in parallel with each other, and the direction L in which the tear line enters the respective tear sides ₅₀ It is arranged toward the. Further, as shown in FIG. 3, the cut line between the first weakening line 20 and the second weakening line 30 is formed only in the outermost plastic film 12 of the composite packaging material 18.
[0028]
By arranging the first weakening line 20 and the second weakening line 30 in this way, as shown in FIG. 4, the first weakening line 20 and the second weakening line 30 can be opened by the tearing force applied to the first weakening line 20 and the second weakening line 30 as shown in FIG. The tear line L formed in the region of the weakening line 20 ₂₀ And the tear line L formed in the region of the second weakening line 30 ₃₀ Is the interval W between the first weakening line 20 and the second weakening line 30 _20-30 Therefore, the packaging bag body 10 is displaced in the vertical direction. At this time, for example, a tear line that passes through one substantially C-shaped break of the weakening line 34 is changed to a desired tear direction L depending on the degree of force applied. ₅₀ Even if the vehicle travels in a direction deviating from the direction of travel, wait for the approximately C-shaped break of any of the weakening lines 32 to 36 positioned next to the traveling direction to face the tearing side having the spread of the required angle D. The direction is corrected here and the desired tear direction L ₅₀ (In FIG. 4, the tear line L ₂₀ And L ₃₀ See). Finally, the desired tear direction L ₅₀ The packaging bag body 10 is torn while being controlled in parallel with. As a result, as shown in FIGS. 5 and 6, the tear opening L is formed in the opening 60 after opening. ₃₀ Edge portion 70 along the tear line L ₂₀ And this portion becomes the knob portion 70 of the opening 60.
[0029]
In the opening operation, in order to make the first weakening line 20 and the second weakening line 30 function ideally as described above to secure a sufficient knob portion 70, the first weakening line 20 and the second weakening line shown in FIG. Distance W from line 30 _20-30 The shape of the line of the weak line (in the present embodiment, a substantially perforated deformed perforation), the number of the weak lines constituting the first weak line 20 and the second weak line 30, the length of the line of the weak line W ₁ , Interval W between cuts ₂ , The interval W between the weak lines constituting the first weak line 20 and the second weak line 30 _Three , Desired tear direction L ₅₀ The angle D of the substantially C-shaped cut is set in consideration of the strength of the composite packaging material 18 used.
[0030]
From such a viewpoint, the distance W between the first weakening line 20 and the second weakening line 30. _20-30 Is preferably in the range of 1 to 10 mm, particularly preferably 2 to 6 mm. This is the distance W between the first weakening line 20 and the second weakening line 30. _20-30 If it is less than 1 mm, the area of the knob portion that can be formed after opening tends to be small, and it tends to be difficult to pinch with the fingertips. Is the desired tear direction L ₅₀ It becomes easier to deviate, and the direction of the first weakening line 20 and the second weakening line 30 cannot be corrected due to a large tearing force, and the tearing proceeds outside the first weakening line 20 and the second weakening line 30. If the direction of the tear line cannot be controlled in this way, the tear line after opening will not be a clean horizontal line, but will have significant irregularities and unnecessary tears. This is because the mouth does not look good and a trouble that makes it difficult to grip with a finger due to an unnecessary tear is likely to occur even though the knob portion 70 is formed.
[0031]
In addition, the number of weak lines constituting the first weak line 20 and the second weak line 30 is preferably 1 to 10, more preferably 2 to 4, respectively. If the number of weakening lines exceeds 10, it takes time for manufacturing and the portion of the packaging bag that is torn off by tearing is undesirably large. Also, by providing a plurality of weak lines, each tear line L ₂₀ And L ₃₀ The desired direction L ₅₀ The tearing can be surely progressed while correcting. In particular, when the number of the weakening lines constituting the first weakening line 20 and the second weakening line 30 is 2 to 4, a sufficient knob portion 70 is formed, and the tearing line is formed horizontally and smoothly without unevenness. Therefore, the appearance of the opening after opening tends to be improved.
[0032]
The notch 50 is a starting point of tearing when opened. Therefore, a position where effective tearing is possible, that is, a desired tearing direction L ₅₀ It is important that the first weakening line 20 and the second weakening line 30 formed so as to correspond to each other are formed at positions where they function effectively. From this point of view, the notch 50 has a seal portion 10a and a seal portion 10b region R including the tear-side end of the first weakening line 20 and the tear-side end of the second weakening line 30 as shown in FIG. ₅₀ Is preferably formed as R ₅₀ It is more preferable that the first weakening line 20 is formed in a region between the first weakening line 20 and the second weakening line 30. More preferably, it is formed on the central axis or on the central axis of the weakening line 32 closest to the first weakening line 20 among the weakening lines constituting the second weakening line 30. This is because when the notch 50 is formed in a portion other than the above and tearing is started, each tear line L ₂₀ And L ₃₀ This is because there is a greater tendency that the first weakening line 20 and the second weakening line 30 to be formed cannot effectively proceed.
[0033]
In the present embodiment, as shown in FIG. 4, the notch 50 is formed on the central axis of the weakening line 22 closest to the second weakening line 30 among the weakening lines constituting the first weakening line 20. By doing in this way, tearing can be started smoothly using the weakening line 22 in the opening operation. Further, since the tear starting point is in the first weakening line 20 region and the second weakening line region, the actual tearing line can always start from the inside of this region, and the force applied during the tearing operation Desired tear direction L ₅₀ Even if it deviates, it is caught by other weak lines formed on the outside, and the desired tearing direction L is ensured. ₅₀ Will be corrected. The depth of the notch 50 is set to be smaller than the width of the seal portion 10a and the seal portion 10b so that the sealed state of the packaging bag body 10 before opening can be maintained. The shape of the notch 50 is not particularly limited, and may be a so-called I notch or V notch, for example.
[0034]
Moreover, in the packaging bag body 10 of this embodiment, since the 2nd weakening line 30 is arrange | positioned above the packaging bag body 10 with respect to the 1st weakening line 20, after opening, it shows in FIG. The tear line L formed in the second weakening line 30 ₃₀ A tear line L formed in the first weakening line 20 by the edge portion 70 along ₂₀ Further, it projects upward and becomes a knob portion 70, which is used to open and close the opening 60. Therefore, these tear lines L ₂₀ And L ₃₀ Can be formed horizontally in the regions of the first weakening line 20 and the second weakening line 30 without unevenness, the displacement between the first weakening line 20 and the second weakening line 30 is effectively used. The size of the knob portion 70 that can be formed in the opening 60 is sufficiently large, and the aesthetics of the opening is also improved.
[0035]
In this way, the tear line L ₂₀ And L ₃₀ In the packaging bag body 10 of the present embodiment, the tear start direction S suitable for the user to arrange the first weakening line 20 and the second weakening line 30 is used as the packaging bag body 10 of the present embodiment. ₅₀ It is effective to devise guidance so that can be selected. Here, the tear initiation direction S suitable for the arrangement of the first weakening line 20 and the second weakening line 30 ₅₀ As shown in FIGS. 1 and 3, the first weakening line 20 located below the second weakening line 30 is disposed from the second surface 10 </ b> B where the second weakening line 30 is disposed. The direction twisted in the direction of 10A of 1st surfaces is shown.
[0036]
In this way, the tear start direction S ₅₀ As shown in FIG. 3, the first weakening line 20 is positioned below the second weakening line 30 by starting to tear so as to twist from the second face 10B to the first face 10A. Therefore, since the size of the upper part of the second surface 10B to be cut off by tearing is smaller than the size of the upper part of the first surface 10A to be cut off by tearing, the upper part of the second surface 10B to be cut off by tearing Is torn without being obstructed by the first surface 10A remaining after being torn. And since the force required for tearing at this time is small, each tear line L ₂₀ And L ₃₀ Is the desired tear direction L ₅₀ Therefore, there is a greater tendency that the packaging bag body 10 can be torn cleanly and a sufficient knob portion 70 can be secured.
[0037]
On the other hand, in FIG. 3, the direction from the first surface 10A to the second surface 10B (S in FIG. ₅₀ When the tearing is started to twist toward the opposite direction), the first weakening line 20 is positioned below the second weakening line 30, so the portion of the first surface 10A to be cut off by tearing is It becomes the shape supported by the knob part 70 of the 2nd surface 10B formed gradually during an opening operation | work, and the operation | movement of tearing will be inhibited by the knob part 70. FIG. At this time, particularly when the packaging material 18 forming the packaging bag 10 is poor in elasticity, the force applied to tearing is increased by being hindered by the knob portion 70, and the tear line has a desired tearing direction L. ₅₀ There is a possibility that the tendency to shift with respect to (see FIG. 1) becomes large. And as a result, each tear line L ₂₀ And L ₃₀ May become difficult to be formed horizontally, the unevenness becomes intense, and there is a greater tendency to cause a problem that the aesthetics of the edge of the opening after opening is worsened.
[0038]
The tear starting direction S suitable for the arrangement of the first weakening line 20 and the second weakening line 30 when the user opens as described above. ₅₀ As a specific guiding method for selecting the tearing direction, for example, the tearing start direction S is formed along the weakening line 22 formed with the notch 50 on the first surface 10A side. ₅₀ There is a method of applying a mark with an insertion picture or the like that clearly indicates.
[0039]
As shown in FIG. 3, the plastic fastener 40 has a male portion 40A disposed on the plastic film layer 13 inside the first surface 10A, and the female portion 40B faces the male portion 40A. Is disposed on the inner plastic film layer 13. By holding the male part 40A and the female part 40B of the plastic fastener 40, an unused packaged item remaining in the packaging bag 10 is held in a desired sealed state even after the packaging bag 10 is opened. Can be kept.
[0040]
In addition, the package to be stored in the packaging bag body is not particularly limited. For packages to be stored, it is desirable to seal and store unused items after opening and to easily remove the unused items when necessary. It is especially effective when used. For example, it is suitable for a packaged product such as a pharmaceutical agent including a shipping agent, a tape agent, foodstuffs, cosmetics, toiletries, and envelopes.
[0041]
Hereinafter, a method of using the packaging bag 10 according to the present embodiment shown in FIG. 1 will be described with reference to FIGS.
[0042]
First, as shown in FIG.1 and FIG.3, the part in which the notch of the packaging bag 10 is formed is lightly pinched, and the tear start direction S ₅₀ Begin to tear by twisting in the direction of. As shown in FIG. 4, when opening the packaging bag body 10 from the notch 50 and starting to tear the seal portion 10a and 10b, the first surface 10A and the second surface 10B are integrated with each other. In the region, the tear line is a single line that travels along the weakening line 22, but when the tear progresses and passes this seal region, the tear line L toward the first surface 10A. ₂₀ And tear line L toward the second surface 10B ₃₀ Branch to. Then this L ₂₀ And L ₃₀ Is advanced toward the easily tearable portions of the first surface 10A and the second surface 10B, that is, the first weakening line 20 and the second weakening line 30 by the force applied for tearing, respectively. The first weak line 20 and the second weak line 30 are reached. Here, the tear line L is extended by the function of the weak line as previously described. ₂₀ And L ₃₀ Is the desired tear direction L ₅₀ It is gradually controlled so as to be parallel to the direction, and eventually reaches the edge of the packaging bag body 50 facing the notch 50, so that the user is careful to open the packaging bag body 10 as well. It can be done smoothly and cleanly without paying. Then, by pinching the knob portion 70 that can be formed in the opening 60 after opening, the packaging bag 10 can be easily opened and closed even after opening. For example, even a user who is not good at performing dexterous work with fingertips such as elderly people and children can easily open and close the packaging bag body 10 by pinching the knob portion 70. Moreover, since the plastic fastener 40 is provided, an unused packaged item can be stored in a sealed state.
[0043]
FIG. 7 is a schematic sectional view showing a second embodiment of the packaging bag body 10 according to the present invention, and FIG. 8 is a development view showing the third embodiment of the packaging bag body 10 according to the present invention. .
[0044]
The packaging bag body 10 shown in FIG. 7 differs from the configuration of the packaging bag body 10 shown in FIGS. 1 to 3 in the shape of the plastic fastener 40 in the following points.
[0045]
As shown in FIG. 7, the width W of the male portion 40 </ b> A of the plastic fastener 40. _40A However, the upper edge of the substrate is set to be parallel along the weakening line 22 constituting the first weakening line 20. On the other hand, the width W of the substrate of the female portion 40B _40B Also, the upper edge of the substrate is set so as to be parallel along the weakening line 32 constituting the second weakening line 30. As a result, the width W of the substrate of the male part 40A _40A And width W of female part 40B _40B Is a gap W between the first weakening line 20 and the second weakening line 30 _20-30 Will match. Thereby, in the opening operation, the tearing force is such that the contact portion of the edge portion along the weakening line of the first weakening line 20 and the male portion 40A of the plastic fastener 40, the portion of the second weakening line 30, and the plastic fastener 40. Of the female portion 40B, and the edge portion of the plastic fastener 40 along the weakening line of the female portion 40B is a guide line against the formation of the tear line. It plays a role, and it becomes easy to form a tear line neatly in a desired tear direction.
[0046]
The packaging bag 10 shown in FIG. 8 differs from the configuration of the packaging bag 10 shown in FIGS. 1 to 3 in the shape of the first weakening line 20 and the second weakening line 30 in the following points. is there.
[0047]
As shown in FIG. 8, the first weakening line 20 and the second weakening line 30 are formed by linear cut processing, and set in advance so that the tear line after opening can be linearly cleaned. This is effective in the case of a packaging bag that is relatively easy to tear in a desired tear direction depending on the material of the packaging material to be used. In this case as well, it is preferable that 1 to 10 weak lines are formed as necessary.
[0048]
The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the above embodiment. For example, the substantially C-shaped weak line C-shaped breaks may be alternately arranged asymmetrically without being arranged on the target with respect to the tearing direction. Further, the first weakening line and the second weakening line may be formed non-parallel as long as they have the above-described deviation. Further, the arrangement of the male part and the female part of the plastic fastener with respect to the first surface and the second surface may be opposite to the arrangement in the packaging bag body of the above embodiment. Further, the first weakening line and the second weakening line may be formed non-parallel as long as they have the above-described deviation. Moreover, the layer in which the weak line which comprises the composite packaging material was formed may be formed as an internal layer, without being laminated | stacked on the outermost side of a composite packaging material. Further, the order of stacking the layers constituting the composite packaging material is not limited to the above-described embodiment. For example, a plastic film layer may be stacked on the outermost side as a layer in which a weak line is formed.
[0049]
Moreover, although the thing using the composite packaging material which has a 4 layer structure as a packaging material which forms a packaging bag body was demonstrated here, the packaging bag body based on this invention is to the conditions to be packaged and its preservation | save. Accordingly, the number of layers and the material constituting the layers can be appropriately selected, and are not particularly limited. For example, the layers may be formed from a single layer packaging material.
[0050]
Further, although the packaging bag body in the form of a four-side seal has been described here, the form of the packaging bag body according to the present invention is not limited to this form, for example, a three-side seal form. May be.
[0051]
Furthermore, although the packaging bag of the form which formed the notch was demonstrated here, the form which does not form a notch may be sufficient.
[0052]
【Example】
Hereinafter, the content of the packaging bag of the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.
[0053]
Example 1
Two sheets of rectangular composite laminate film (thickness of four layers combined; 100 μm) laminated from the outside with four layers of paper, plastic film (polyethylene), aluminum foil, and plastic film were prepared. Two sides. Next, as shown in FIG. 2, the first weakening line and the second weakening line are formed on the first and second surfaces of the packaging bag body, respectively, so that the first weakening line is located on the lower side. did. Here, each of the first weakening line and the second weakening line has three rows of parallel, substantially square-shaped weakening lines (width of cuts: 1.0 mm, width between cuts: 0.4 mm with respect to the central axis direction of the weakening lines. It was formed as an aggregate having a cut angle of 20 ° and a distance between the weakening lines of 1.9 mm. Also, the distance between the first weak line and the second weak line (W in FIG. _20-30 Is equivalent to 3.0 mm. Moreover, the plastic fastener was provided in the lower part of the 1st weakening line. Then, the two composite laminate films were overlapped and sealed around the four sides to produce a packaging bag having a four-sided seal shape. In addition, the ship agent was accommodated in the inside as a package.
[0054]
(Example 2)
A packaging bag in the same manner as in Example 1 except that the interval between the first weakening line and the second weakening line is 5.0 mm, and there are two weakening lines constituting the first weakening line and the second weakening line. The body was made.
[0055]
(Example 3)
A packaging bag was produced in the same manner as in Example 1 except that the interval between the first weakening line and the second weakening line was 11.0 mm.
[0056]
Example 4
Packaging bag body as in Example 1, except that the interval between the first weakening line and the second weakening line is 0.8 mm, and that there is one weakening line constituting the first weakening line and the second weakening line. Was made.
[0057]
(Example 5)
The packaging bag body was made in the same manner as in Example 1 except that the interval between the first weakening line and the second weakening line was 10.5 mm, and that there was one weakening line constituting the first weakening line and the second weakening line. Produced.
[0058]
(Comparative Example 1)
A packaging bag was produced in the same manner as in Example 1 except that the interval between the first weakening line and the second weakening line was eliminated, and the first weakening line and the second weakening line were completely overlapped without shifting. .
[0059]
[Evaluation test for ease of opening and closing of opening after opening and aesthetics]
Each sample shown in Examples 1 to 5 and Comparative Example 1 was distributed to 30 users one by one and opened at the part of the weak line, and the opening and closing of the opening made after opening these samples was opened. An evaluation was made as to whether or not it can be easily opened and closed by measuring the ease of pinching of the knob portion that can be formed later. At the same time, the aesthetics of the opening were also evaluated.
[0060]
The test results of these samples are as follows. 5: Easy opening and closing of the opening after opening and aesthetics 5; The tear line formed at the first weakening line and the second weakening line is torn almost horizontally, and the knob part Has a sufficient size and is easy to pinch with a finger, and is excellent in the aesthetics of the opening. 4; Unevenness is seen in the tear line formed in the first weakening line and the second weakening part, and the aesthetics of the opening is Slightly inferior, but the knob portion is sufficiently large and easy to pinch with fingers. 3; The unevenness is noticeably seen in the tear line formed in the first weakening line and the second weakening part, and the opening mouth is beautiful It is inferior and the knob part is not sufficiently large, so it is difficult to pinch with fingers. 2; The distance between the tear lines formed at the first weakening line and the second weakening line is small, and the knob part is sufficiently large. Do not have a little finger Ugly, 1; shown in Table 1 based on the tear line portion thumb exactly match is unlikely knob very finger not formed at all, and the evaluation criteria.
[0061]
[Table 1]

[0062]
As is apparent from the results shown in Table 1, the packaging bags according to the first to fifth embodiments of the present invention are arranged by shifting the first weakening line in the vertical direction with respect to the second weakening line. Later, it was confirmed that the knob part was formed so as to protrude from the opening part, and this knob part could be pinched with a fingertip, and the opening part could be easily opened and closed.
[0063]
Particularly, a preferred embodiment of the present invention in which the distance between the first weakening line and the second weakening line is 3 mm and 5 mm, respectively, and the weakening lines constituting the first weakening line and the second weakening line are two and three, respectively. It was confirmed that the packaging bags shown in Examples 1 and 2 corresponding to 1 can easily open and close the opening, and the tear line is formed cleanly, so the appearance of the opening is also good.
[0064]
【The invention's effect】
As described above, according to the packaging bag body of the present invention, an appropriate grip portion is formed at the opening of the packaging bag body after opening based on the shift portion between the first weakening line and the second weakening line. To provide a packaging bag body that can be easily pinched with a fingertip, and can be easily opened and opened / closed after opening. Is possible.
[Brief description of the drawings]
FIG. 1 is a front view showing a preferred embodiment of a packaging bag according to the present invention.
2 is a development view of the packaging bag shown in FIG. 1. FIG.
3 is an enlarged schematic cross-sectional view of the packaging bag body shown in FIG. 1 when viewed from a direction perpendicular to the direction of each weak line.
4 is a schematic diagram showing an actual cut line (tear line) formed at the first weakening line and the second weakening line when the packaging bag shown in FIG. 1 is opened. FIG.
FIG. 5 is a front view showing a state after the packaging bag body shown in FIG. 1 is opened;
6 is a development view of the packaging bag after opening shown in FIG. 5. FIG.
FIG. 7 is a development view showing a second embodiment of the packaging bag of the present invention.
FIG. 8 is a schematic cross-sectional view showing a third embodiment of the packaging bag of the present invention.
FIGS. 9A and 9B are a front view and a developed view showing a state before a conventional packaging bag body is opened, respectively.
FIGS. 10A and 10B are a front view and a developed view showing a state after opening a conventional packaging bag body, respectively.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Packaging bag body, 10A ... First surface of packaging bag body, 10B ... Second surface of packaging bag body, 10a ... Seal portion of first surface 10A of packaging bag body, 10b ... Packaging bag body Sealing part of the second surface 10B, 12 ... paper with a weak line, 14 ... plastic film (sealing layer), 16 ... aluminum foil (sealing layer), 18 ... composite packaging material, 20 ... first weakening line ( (In the case of deformation perforation), 22-26 ... a row of weakening lines constituting the first weakening line, 30 ... a second weakening line (in the case of deformation perforation), 32-36 ... a second weakening line Line of weak lines, 40 ... plastic fastener (sealing means), 40a ... male part of plastic fastener, 40b ... female part of plastic fastener, 50 ... notch (cut), 60 ... opening, 70 ... knob part made after opening, L ₂₀ ... the tear line that can be formed at the first weak line when opened, L ₃₀ ... the tear line that can be formed at the second weak line when opened, L ₅₀ ... Tearing direction of packaging bags, S ₅₀ ... tearing start direction of packaging bag body, X ... central axis when unfolding packaging bag body, W ₁ ... Weak line cut width, W ₂ ... Weak line seam width, W _Three ... interval between each weak line constituting the first weak line or the second weak line, W _20-30 ... the distance between the second weak line side edge of the first weak line and the first weak line side edge of the second weak line, W _40A ... male width of plastic fastener, W _40B ... width of female part of plastic fastener, 100 ... conventional packaging bag, 100A ... first surface of conventional packaging bag 100, 100B ... second surface of conventional packaging bag 100, 200 ... conventional First weakening line of packaging bag body 100 (in case of perforation processing), 300 ... Second weakening line of conventional packaging bag body 100 (in case of perforation processing), 400 ... opening, 500 ... after opening Edge portion along second weakening line 200, 600... Edge portion along second weakening line 300 after opening.

Claims (5)

A packaging bag having a first weakening line for opening provided on one of a pair of opposing surfaces, and a second weakening line for opening provided on the other surface and extending in parallel with the first weakening line. In
The first weak line is arranged with a deviation in a direction perpendicular to the second weak line with respect to the second weak line;
Each of the first weakening line and the second weakening line is formed as an assembly of a plurality of weakening lines,
Comprising an opening notch formed at the end of the first weakening line ,
A packaging bag, wherein an interval between an edge of the first weakening line on the second weakening line side and an edge of the second weakening line on the first weakening line side is 1 to 10 mm. . 2. The packaging bag according to claim 1 , wherein the first weakening line and the second weakening line are deformed perforations. The packaging bag body is composed of at least one hermetic layer that stably holds an object to be packaged in an airtight state and at least one layer having the first weakening line and / or the second weakening line. The packaging bag according to claim 1 or 2 , wherein the packaging bag is formed of a packaging material. The packaging bag according to claim 3 , wherein the sealing layer is an aluminum layer. The packaging bag according to any one of claims 1 to 4 , further comprising a sealing means for sealing the opening after opening.

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