JP2001151246A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag to be easily unsealed and easily open and close an unsealed mouth after once unsealed. SOLUTION: A packaging bag 10 is provided with first yielding lines 20 for unsealing formed on one face 10A of a pair of faces facing each other and second yielding lines 30 for unsealing formed on the other face 10B, and the first yielding lines are disposed to be shifted by a portion of W20-30 in the vertical direction of the second yielding lines. As the first yielding lines and the second yielding lines are disposed as described above, an adequate knob section is formed on the unsealing mouth of the packaging bag after unsealing based on the shift section between the first yielding lines and the second yielding lines, and the knob section can be easily pinched by the tips of fingers to easily carry out the unsealing work and also easily opening and closing the unsealed mouth after once unsealed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag having a line of weakness for opening.

[0002]

2. Description of the Related Art Conventionally, a front view of FIG.
2. Description of the Related Art A packaging bag as shown in a development view of FIG. The packaging bag 100 is provided on a pair of opposing surfaces of the bag 100 with a perforated or deformed perforated weakening line (hereinafter referred to as one of the opposing surfaces 100A) to facilitate the opening operation. Weak line is "First weak line 20
0 ", and the weakening line provided on the other surface 100B is referred to as a" second weakening line 300 ". For example, Japanese Utility Model Registration No. 2566444 discloses a packaging bag provided with a deformed perforated weakening line.

[0003]

However, FIG.
(A) and a conventional packaging bag 1 as shown in FIG. 9 (b).
00 can be easily opened by tearing from the first weakening line 200 and the second weakening line 300, but the opening 400 of the bag 100 after opening as shown in FIG. The opening 400 is quickly opened when necessary, and the bag 10 is closed.
There is a problem that it is difficult to easily take out the packaged items in the package.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a packaging bag which can be easily opened and can be easily opened and closed after opening. The purpose is to:

[0005]

The inventors of the present invention have conducted intensive studies to achieve the above-mentioned object. As a result, the cause of the above-mentioned problem is that the conventional packaging bag 100 is developed as shown in FIG. As shown in the figure, the opening 400 of the bag 100 formed after opening.
In this case, 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 easily adhere to each other, the opening 400
Is easy to close, and once closed, its edge 50
It has been found that the inability to easily pinch either 0 or 600 with a fingertip has a great effect. 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 formed after opening, so that the opening can be used even after the opening is closed. It was found that the opening could be easily opened.

That is, the packaging bag of the present invention comprises a first weakening line for opening provided on one of a pair of opposing surfaces;
In a packaging bag having a second line of weakness for opening provided on the other surface, the first line of weakness is displaced from the second line of weakness in a direction perpendicular to the second line of weakness. It is characterized by having been done.

[0007] As described above, the first weakening line and the second weakening line are arranged so as to be displaced from each other, so that the opening portion after opening has an edge portion along the first weakening line based on the displaced portion or One of the edge portions along the second line of weakness protrudes to form a knob portion, and the opening portion can be easily opened and closed using the knob portion.

[0008] Here, the "weak line" is formed by subjecting a packaging material forming a packaging bag body to a straight or perforated cut processing or the like. Shown is one that can be easily opened by tearing the packaging bag. In addition, the linear cut processing is a processing in which a linear groove is continuously formed while leaving a small thickness in the packaging material, and the perforated cut processing is a processing in which a slit or a groove is formed in the packaging material. It is applied continuously at intervals.

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”. . Also,
The state in which "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 is subjected to the method of the first surface and the second surface. Looking from the line direction,
When the first line of weakness on the first surface is translated on the second surface in the normal direction, the first line of weakness and the second line of weakness have a deviation without overlapping on the second surface. The state of arrangement is shown. In addition, for the above weakening line, the edge of the cut actually formed on the first surface and the second surface when the packaging bag is torn during the opening operation will be described as a `` tear line '' in the following description. And

[0010] As described above, the first weakening line and the second weakening line are arranged so as to be displaced from each other to form the knob portion after opening, so that a special knob portion is formed in advance and opening is assumed. There is no need to attach near the mouth.

Further, in the packaging bag of the present invention, 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 1 to 10 mm. Preferably, there is. Thereby, the area of the knob portion formed in the opening after the opening is sufficiently ensured, and the finger can be more easily pinched.

In the packaging bag of the present invention, it is preferable that the first weakening line and the second weakening line have a deformed perforated shape. By forming the weakening line in such a shape, an actual tear line formed along the weakening line at the time of opening is formed in a desired direction as described later. In particular, when the first line of weakness and the second line of weakness have a deviation as in the present invention, the tear line is displaced from the desired tearing direction due to the force applied to the line of weakness at the time of tearing. It is effective in preventing it.

Here, the "deformed perforation" is a cut in a shape such as a substantially C-shape, a substantially Y-shape, a substantially U-shape, or a substantially arc shape as described in Utility Model Registration No. 2566444. Indicates that formed continuously at predetermined intervals. For example, a substantially C-shaped cut is formed by inclining two perforated cuts so as to form a substantially C-shaped cut, and is generally formed by a substantially C-shaped cut with respect to a desired tearing direction. Are formed continuously at a predetermined interval with the expanded side facing. By doing so, the actual tear line that enters from the widened side of this substantially C-shaped cut will come out from the narrowed side of the cut, and is controlled to converge in the desired tearing direction. Becomes In addition, the side where the cut of the substantially C-shape is widened will be used for the description after the “tear side”.

Further, in the packaging bag of the present invention, it is preferable that the first weakening line and the second weakening line are each formed as an aggregate of 1 to 10 weakening lines. In this way, the tear line is reliably formed in the desired tear direction without being displaced from the desired tear direction due to the force applied to the weakened line portion at the time of tearing, and the knob portion after opening is sufficiently secured. Will be done. The interval between the edge on the second line of weakness of the first line of weakness described above and the edge of the first line of weakness on the second line of weakness is
In this case, the line formed at the position closest to the second line of weakness among the lines of weakness forming the first line of weakness, and the first line of weakness of the lines of weakness forming the second line of weakness The distance between the line formed at the closest position is indicated, and this will be described in the following description as "the distance between the first line of weakness and the second line of weakness".

[0015] The packaging bag of the present invention may be configured such that an end of the first weakening line, an end of the second weakening line, or an end between the first weakening line and the second weakening line. It is preferable to further include a notch for opening formed at the site. By providing the cuts in this way, the opening operation can be started more smoothly, and the parts other than the weakened line are not torn without fail. Can be done.

Further, the packaging bag of the present invention comprises at least one sealing layer for stably holding an article to be packaged in an airtight state,
At least one having a first weakening line and / or a second weakening line
It is preferably formed of a composite packaging material composed of two layers. By forming the packaging bag from the composite packaging material having the laminated structure as described above, the strength of the packaging bag can be increased, and each layer can be formed according to the conditions for storing the packaged object in the bag. Can be selected. Furthermore, the packaged object can be kept in a desired sealed storage state before opening by the sealing layer. This includes products containing volatile components such as medicines, foods, etc. as packaged items, products whose quality greatly depends on the content of moisture, and quality degradation that easily occurs due to an 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 product in an airtight state, and more preferably has a chemically stable surface or a chemically stable surface for the packaged product. It is a layer that has been subjected to surface processing and has little adsorption or permeability to the components of the package, and has little permeability to external air components and moisture. And a layer which can stably hold the packaged object in an almost initial state.

Further, in the bag for packaging of the present invention, the sealing layer comprises:
Preferably, it is an aluminum layer. Aluminum foil has excellent airtightness, is chemically stable due to the oxide film on the surface, and is lightweight and easy to tear, so that it is suitable as a sealing layer. Especially for cataplasms containing a large amount of volatile components, aluminum foil and gas barrier materials that do not allow the volatile components to permeate, and acrylonitrile films that do not absorb the volatile components are used as sheet-like components. Alternatively, it is desirable to use a laminated material containing these in a layer structure.

It is preferable that the packaging bag of the present invention further comprises sealing means for sealing the opening after opening. As a result, even after the opening, the opening can be completely closed again, and the unused packaged object can be kept in a sealed state. Here, the "sealing means" indicates a member for sealing an opening such as a plastic fastener.

[0019]

Preferred embodiments of the present invention will be described below in more detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals,
In the drawing, the packaging bag and a part thereof are all shown with the side where the opening is formed upward.

FIG. 1 is a front view of a preferred embodiment of the packaging bag of the present invention, and FIG. 2 is a developed view of the packaging bag of FIG. 1 as viewed from the outer surface side. FIG. 3 is an enlarged schematic cross-sectional view of the packaging bag of FIG.

As shown in FIGS. 1 and 2, the packaging bag 10 of the present embodiment is obtained by laminating two composite packaging materials 18 having a rectangular laminated structure, and sealing the outer edges of each of the composite packaging materials 18 by pressing or the like. It has the form of a four-sided seal. On the upper side of the first surface 10A of the packaging bag 10, a first weakening line 20 for opening is formed in parallel with the short direction of the first surface 10A. On the other hand, a second weakening line 30 for opening is also provided on the second surface 10B in parallel with the first weakening line 20 and further on the upper side of the packaging bag body 10 with respect to the first weakening line 20 by a predetermined distance W. It is formed with a gap of _20-30 .

The first weakening line 20 is an aggregate in which three substantially U-shaped deformed perforated weakening lines 22, 24, and 26 are formed in parallel from above, respectively. Second weak line 3
0 is also a substantially U-shaped deformed perforated weakening line 32, 3
Reference numerals 4 and 36 denote an aggregate formed of three parallel members from below. These weakening lines 22-26, 32-36
Earlier line tear from tear side cuts of upward toward the inner edge 26b thereof shaped are arranged along the direction L ₅₀ tear to fall as mentioned. And among these weak lines, the first weak line 2
A notch 50 (notch) for smoothly starting the opening operation is provided on the first surface 10A of the tearing side end of the weakening line 22 formed at the position closest to the second weakening line 30 in FIG. To the second surface 10B. Further, a plastic fastener 40 (sealing means) for opening and closing an opening formed after opening is provided inside the packaging bag body 10 in parallel with the first weakening line 20 and below the first weakening line 20. ing.

The first weakening line 20 and the second weakening line 3
An interval W _{20-30 from} 0 is a weakening line 22 formed at a position closest to the second weakening line 30 in the first weakening line 20,
The distance between the respective central axes of the second weakening line 30 and the weakening line 32 formed closest to the first weakening line 20 is shown. Then, at the time of opening, the actual tear line is formed in the region of the first weakening line 20 and the second weakening line 30, respectively, thereby forming an opening.

The details of each component will be described below with reference to FIGS.

The composite packaging material 18 forming the packaging bag 10
As shown in FIG. 3, paper 12 is laminated as a layer having a weakened line from the outside to the inner side, and plastic film 14, aluminum foil 16 and plastic film 14 are formed as a sealing layer having no weakened line. A composite laminated film 18 having a four-layer structure is used. Here, as described above, aluminum foil is preferably used as one of the sealing layers because of its light weight, easy tearing, and excellent airtightness and chemical stability. This composite laminate film 18 can be produced by a dry lamination method, a wet lamination method, a hot melt laminating method.
It can be produced by using a known production method such as an extrusion method or an extrusion lamination method. When the break of the line of weakness is formed with a small thickness without penetrating the layer on which the line of weakness is formed, the line of weakness may also be formed in the sealing layer.

Further, the constituent material of each layer of the composite packaging material 18 is not particularly limited, regardless of the formation of the weakening line.
Paper, non-woven fabric, aluminum, cellophane, nylon, polyester, polypropylene, polyvinyl chloride, polyamide, polyacrylonitrile, olefin, polyvinylidene chloride, polyvinyl alcohol, ethylene-vinyl acetate copolymer, polycarbonate, polystyrene, ethylene It can be appropriately selected from vinyl alcohol copolymers, ethylene acrylic copolymers and the like. Further, a material obtained by applying a printing ink, an adhesive, or the like thereto, or a material provided with a thin film by a method such as vapor deposition or sputtering may be used. In addition to metals such as aluminum,
A thin film having high gas barrier properties and high transparency, such as silicon oxide, magnesium oxide, and aluminum oxide, is preferable. In any case, it is desirable that the sheet-shaped constituent material has sufficient flexibility as a packaging bag.

As shown in FIGS. 2 and 3, the first weakening line 2
0 and the second weakening line 30 are arranged in parallel with each other at a predetermined interval _W20-30 on the first surface 10A and the second surface 10B, and each tearing side has a direction L in which the tearing line enters.
It is arranged toward ₅₀ . Also, as shown in FIG.
The break 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.

Thus, the first weakening line 20 and the second weakening line 3
4, the tear line L formed in the area of the first weakening line 20 by the tearing force applied to the first weakening line 20 and the second weakening line 30 at the time of opening, as shown in FIG. _The tear line L30 formed in the area between the first and second weakening lines ₂₀ and ₃₀ is shifted in the vertical direction of the packaging bag body 10 based on the distance _W20-30 between the first and second weakening lines 20 and 30. Will be. At this time, for example, one of the tear lines passing through the shaped cuts substantially Ha weakening line 34, even when traveling in a direction deviating from a desired tear direction L ₅₀ by the depth at which the force, with respect to the traveling direction Since the substantially U-shaped cut of any of the weakening lines 32 to 36 located next to the tearing side with the required angle D extending is waiting, the direction is corrected here and the desired tearing is performed. Direction L
So that the slide into proceeds without departing significantly from ₅₀ (in FIG. 4, refer to tear lines L ₂₀ and L _30). And so that the Yuku tore packaging bag 10 while being parallel to control the final desired tearing direction L _50.
As a result, as shown in FIGS. 5 and 6, the unsealing mouth 60 after opening, becomes dressed edge portion 70 along the tear line L ₃₀ is projected relative to the tear line L _20, this part opening port It becomes the knob part 70 of 60.

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 shown in FIG. The distance W _{20-30 from} the second line of weakness ₃₀ , the shape of the cut of the line of weakness (in this embodiment, a substantially perforated deformed perforation), the first line of weakness 20 and the second line of weakness 30 are formed. number of weakening lines, the length of the cut lines of weakness W _1, spacing W ₂ between the cuts, first weakening line 20 and the distance W ₃ between the weakening lines constituting the second weakening line 30, the desired tear direction L _{5 0} angle D of shaped cuts in upward toward the inner edge 26b thereof against is to be set in consideration of the strength of the composite packaging material 18 used.

[0030] From this viewpoint, the first weakening line 20 interval W _20-30 between the second weakening line 30 is preferably in the range of 1 to 10 mm, 2 to 6 mm is particularly preferred. This is because when the distance W _20-30 between the first weakening line 20 and the second weakening line 30 is less than 1 mm, the area of the knob portion formed after opening becomes smaller, and the finger tends to be harder to pinch.
exceeds m, since hardly tear upon opening would put a large tear force, together with the tear line is likely deviate from the desired tearing direction L _50, the first line of weakness weakening 20 and the second by a large tear force This is because the direction cannot be corrected within the region of the line 30 and the tendency of the tear to progress outside the region of the first line of weakness 20 and the region of the second line of weakness 30 increases. If the opening is not controlled, the tearing line after opening is not a clean horizontal line, and significant unevenness and unnecessary tears are formed, and although the opening of the opening is bad or the pinch portion 70 is formed, it is unnecessary. This is because a problem that the finger is difficult to pinch due to a crack easily occurs.

The number of weakening lines constituting the first weakening line 20 and the second weakening line 30 is preferably 1 to 10, and more preferably 2 to 4. The number of weak lines is
If the number is more than 10, it takes much time and effort to manufacture, and the portion of the packaging bag that is cut off by tearing becomes undesirably large. Further, by providing a plurality of weakening lines, the direction of each tear line L ₂₀ and L ₃₀ desired direction L
_The tear can be made to progress reliably while correcting to ₅₀ . In particular, when the number of the weak lines constituting the first weak line 20 and the second weak line 30 is two to four, the sufficient knob portion 7 is provided.
Since 0 is formed and the tear line is formed horizontally and neatly without irregularities, the appearance of the opening after opening tends to be improved.

The notch 50 serves as a starting point for tearing upon opening. Therefore, effective tear is positionable, i.e. is important that the desired and tear direction L ₅₀ first weakened lines 20 are formed corresponding to the second weakening line 30 is formed at a position to function effectively is there. Notch 5 from this perspective
0 is formed in a region R ₅₀ of the sealing portion 10a and the seal portion 10b comprising an end portion of the tear side of the first weakening line 20 and the end tear side of the second line of weakness 30 as shown in FIG. 2 Is preferably formed in a region between the first weakening line 20 and the second weakening line 30 in R ₅₀ ,
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 or the second weakening line 30
Is more preferably formed on the central axis of the weakening line 32 that is closest to the first weakening line 20 among the weakening lines that constitute.
This is because when you start a tear forming a notch 50 at a site other than the above, and the tear lines L ₂₀ and L ₃₀ are, in the area between the first weakening line 20 to be formed respectively with a second weakening line 30 This is because the tendency to be unable to proceed effectively increases.

In this 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 so, tearing can be started smoothly using the weakening line 22 in the opening operation. Also, the tearing start point is the first weakening line 20.
Since in the region and the region of a second weakening line can actually tear line begins always proceed from the interior of this region, the forces exerted during tearing operations even deviate from the desired tear direction L ₅₀ surely it is captured by other weakening line formed on the outside and thus is corrected to a desired tear direction L _50. The cut depth of the notch 50 is set smaller than the width of the seal portions 10a and 10b so that the sealed state of the packaging bag 10 before opening can be maintained. Note that the shape of the notch 50 is not particularly limited, and for example, a so-called I notch,
It may be a V notch.

Further, in the packaging bag 10 of the present embodiment, the second weakening line 30 is disposed above the packaging bag 10 with respect to the first weakening line 20. 5, a tear line L formed in the second weakening line 30
Edge portion 70 along the ₃₀ is used to open and close the part 70 next to the opening port 60 knob protrudes upward from the tear line L ₂₀ that can be the first line of weakness 20. Therefore, if it is possible to irregularities without horizontally formed these tear lines L ₂₀ and L ₃₀ of the first line of weakness 20 and second line of weakness 30 in the regions, respectively, and the first weakening line 20 and the second line of weakness 30 As a result, the size of the knob portion 70 formed in the opening 60 can be sufficiently obtained, and the beauty of the opening can be improved.

As one of the methods for forming the tear lines L ₂₀ and L ₃₀ neatly in this manner, in the packaging bag 10 of the present embodiment, the user uses the first weakening line 20 and the second weakening line 30. it is effective to devising inducing so as to select the start direction S ₅₀ suitable tear placement. Here, the first weakening line 20 to the starting direction S ₅₀ tear suitable arrangement of the second line of weakness 30, as shown in FIGS. 1 and 3,
It shows the direction of twisting from the second surface 10B where the second weakening line 30 is arranged to the first surface 10A where the first weakening line 20 located below the second weakening line 30 is arranged.

[0036] By thus taking the starting direction S ₅₀ of the tear from the second surface 10B begins tearing to twist in the direction of the first surface 10A, as shown in FIG. 3, the first weakening line 20 is first Because it is located below the second weakening line 30, the size of the upper portion of the second surface 10B that is torn and cut is smaller than the size of the upper portion of the first surface 10A that is torn and cut, The upper part of the second surface 10B that is torn and cut will be torn without being hindered by the first surface 10A that remains after being torn. Since the force required to tear at this time requires only slight force, the tear lines L ₂₀ and L ₃₀ is not deviated little from the desired tear direction L _50, thus together with the packaging bag 10 can be torn cleanly The tendency that a sufficient knob portion 70 can be secured increases.

On the other hand, when starting the tear to twist toward the from the first surface 10A direction of the second surface 10B (the opposite direction of S ₅₀ in FIG. 3) in FIG. 3, the first weakening line 20 is a second weakening Because it is located below the line 30, the portion of the first surface 10A that is torn off and cut will be supported by the knob portion 70 of the second surface 10B that is gradually formed during the opening operation, The tearing operation is hindered by the knob portion 70. At this time, especially when the packaging material 18 to form a packaging bag 10 is poor elasticity, knobs force applied to tear by being inhibited in the portion 70 is increased, the direction L ₅₀ tear tear line is desired (See FIG. 1). As a result, each tear line L ₂₀ and L
₃₀ may not be formed horizontally, the irregularities may become severe, and the tendency for the aesthetic appearance of the edge of the opening formed after opening to deteriorate may increase.

[0038] As a specific method for inducing for can be selected starting direction S ₅₀ tear as described above the user is suitable for placement between the first weakening line 20 of the second line of weakness 30 during opening, for example, The tearing start direction S ₅₀ along the weakening line 22 formed with the notch 50 on the side of the first surface 10A.
There is a method of giving a mark with an illustration or the like that clearly indicates the image.

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 a female portion 40B.
Is disposed on the plastic film layer 13 inside the second surface 20B so as to face the male portion 40A. Male part 40A and female part 4 of this plastic fastener 40
By engaging OB, even after opening the packaging bag 10, unused packaging objects remaining in the packaging bag 10 can be held in a desired sealed state.

There is no particular limitation on the items to be stored in the packaging bag, but it is desirable to seal and store unused items after opening and to easily remove the unused items when needed. This is particularly effective when used for objects. For example, it is suitable for packaging products such as medicines, foods, cosmetics, toiletries, envelopes, etc., including shipping agents and tapes.

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.

First, as shown in FIGS. 1 and 3, the portion of the packaging bag body 10 where the notch is formed is lightly pinched,
So as to twist in the direction of the tear initiation direction S ₅₀ starts to tear. As shown in FIG. 4, when the packaging bag 10 is opened from the notch 50 and starts to tear, the areas of the seal portions 10a and 10b are divided into the first surface 10A and the second surface 10A.
Since B is integrated, the tear line is a single line that advances along the line of weakness 22 in this area, but when the tear further advances and passes through this seal area, the first surface 1
The tear line L ₂₀ toward the 0A branches to the tear line L ₃₀ toward the second surface 10B. After which the L ₂₀ and L ₃₀ is,
Due to the force applied for tearing, the first surface 10A
And a portion of the second surface 10B that is easily torn, that is, a portion of the first weakening line 20 and a portion of the second weakening line 30, respectively, and further, a portion of the first weakening line 20 and the second weakening line 3
0 is reached. Here, by the function of the line weakened as previously described, the tear line L ₂₀ and L ₃₀ is gradually controlled so that each parallel to the direction of the desired tearing direction L _50, eventually facing the notch 50 packaging Since the user reaches the edge of the packaging bag 50, the user can smoothly and cleanly perform the opening operation of the packaging bag 10 without paying any attention. By pinching the knob portion 70 formed in the opening 60 after opening with a finger, the packaging bag 10 can be easily opened and closed even after opening. For example, a user who is not good at performing dexterous work with a fingertip of an elderly person, a child, or the like has a knob portion 70.
By pinching, the opening and closing operation of the packaging bag body 10 can be easily performed. In addition, plastic fastener 40
Is provided, unused packaged items can be stored in a sealed state.

FIG. 7 is a schematic sectional view showing a second embodiment of the packaging bag 10 according to the present invention, and FIG. 8 is a development showing the third embodiment of the packaging bag 10 according to the present invention. FIG.

The packaging bag 10 shown in FIG.
The shape of the plastic fastener 40 differs from the configuration of the packaging bag 10 shown in FIG.

As shown in FIG. 7, the width W _{40 A} of the substrate of the male portion _{40 A} of the plastic fastener 40 is greatly extended upward, and the upper edge of the substrate forms the first weakening line 20. 22 are set so as to be parallel. On the other hand the width W _40B of the substrate of the female part 40B also extended largely upward, and is set to be parallel along the weakening line 32 the upper edge of the substrate constituting the second line of weakness 30. As a result, the deviation due to the difference between the width W _40B of the substrate width W _40A and female part 40B of the substrate of the male portion 40A coincides with the interval W _20-30 between the first weakening line 20 second line of weakness 30 Becomes Accordingly, in the opening operation, the tearing force is applied to the portion of the first weakening line 20, the contact portion of the edge portion along the weakening line of the male portion 40 </ b> A of the plastic fastener 40, the portion of the second weakening line 30, and the plastic fastener 4.
The female part 40B of the plastic fastener 40 comes into contact with the contact part of the edge part along the line of weakness. The male part 40A of the plastic fastener 40 and the edge part of the female part 40B along the line of weakness guide the tear line. And a tear line is more easily formed in a desired tear direction.

The packaging bag 10 shown in FIG.
The first weakening line 20 is different from the configuration of the packaging bag 10 shown in FIG.
And the shape of the second weakening line 30 is different in the following points.

As shown in FIG. 8, the first weakening line 20 and the second weakening line 30 are formed by cutting straight lines, and are set in advance so that the tear line after opening can be cleaned linearly. I have. This is effective for a packaging bag that is relatively easily torn in a desired tearing direction depending on the material of the packaging material used. Also in this case, it is preferable that the number of each weakening line is 1 to 10 as necessary.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments. For example, the notches of the substantially U-shaped weakened lines may be alternately and asymmetrically arranged without being symmetrically arranged in the tearing direction. Further, the first weakening line and the second weakening line may be formed in a non-parallel manner as long as they have the above-mentioned shift. 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 of the above embodiment. Further, the first weakening line and the second weakening line may be formed in a non-parallel manner as long as they have the above-mentioned shift. Further, the layer on which the weakening line is formed, which constitutes the composite packaging material, may be formed as an inner layer without being laminated on the outermost side of the composite packaging material. Further, the order of lamination of each layer constituting the composite packaging material is not limited to the above-described embodiment. For example, a plastic film layer may be laminated on the outermost side as a layer having a weakened line.

Also, here, a description has been given of a case where a composite packaging material having a four-layer structure is used as the packaging material for forming the packaging bag. However, the packaging bag according to the present invention comprises a packaged material and its storage. The number of layers and the material constituting the layers can be appropriately selected depending on the conditions, and are not particularly limited.
For example, it may be formed from a single-layer packaging material.

Although the description has been given of the packaging bag in the form of a four-sided seal here, the configuration of the packaging bag according to the present invention is not limited to this form.
It may be in the form of a side seal.

Further, although the description has been made of the packaging bag having the notch formed therein, the packaging bag may be formed without the notch.

[0052]

EXAMPLES Hereinafter, the contents 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.

Example 1 Two rectangular composite laminate films (thickness of four layers; 100 μm) laminated with four layers of paper, plastic film (polyethylene), aluminum foil, and plastic film from the outside The first and second surfaces were prepared, respectively. next,
As shown in FIG. 2, a first weakening line and a second weakening line were formed on the first surface and the second surface of the packaging bag, respectively, such that the first weakening line was located on the lower side. Here, the first weakening line and the second weakening line are three parallel, substantially C-shaped weakening lines (width of cut; 1.0 mm, width between cuts: 0.4 mm)
Angle of the cut with respect to the central axis direction of the line of weakness; 20 °,
The distance between the weakening lines was 1.9 mm). The distance between the first weakening line and the second weakening line (W in FIG. 2)
_20-30 ) was 3.0 mm. Further, a plastic fastener was provided below the first weakening line. Then, the two composite laminate films were overlapped, and the four circumferences thereof were sealed to produce a packaging bag having the form of a four-sided seal. In addition, a shipping agent was stored as an article to be packaged inside.

(Example 2) [0054] Example 2 is the same as in Example 1 except that the distance between the first weakening line and the second weakening line is 5.0 mm, and the number of weakening lines constituting the first weakening line and the second weakening line is two. A packaging bag was produced in the same manner as in Example 1.

Example 3 A packaging bag was produced in the same manner as in Example 1 except that the distance between the first weakening line and the second weakening line was 11.0 mm.

Example 4 Example 1 was the same as Example 1 except that the distance between the first weakening line and the second weakening line was 0.8 mm, and the number of the weakening lines constituting the first weakening line and the second weakening line was one. A packaging bag was produced in the same manner as described above.

(Example 5) Example 1 was the same as Example 1 except that the distance between the first weakening line and the second weakening line was 10.5 mm, and the number of weakening lines constituting the first weakening line and the second weakening line was one. A packaging bag was produced in the same manner.

(Comparative Example 1) The same as in Example 1 except that the interval between the first weakened line and the second weakened line was eliminated, and the first weakened line and the second weakened line were completely overlapped without displacement. To produce a packaging bag.

[Evaluation Test for Ease of Opening and Closing of Opening Port after Opening and Appearance Appearance] One of the samples shown in Examples 1 to 5 and Comparative Example 1 was distributed to 30 users, respectively, and the weakened portion was distributed. The sample was opened and the opening of the opening after the sample was opened was evaluated by measuring the ease with which the knob portion was opened after the sample was opened. In addition, the beauty of the opening was also evaluated.

The test results of these samples indicate that the opening and closing of the opening after opening is easy and the appearance is good; 5; the tear lines formed at the first weakening line and the second weakening line are almost horizontal and tear well. , The knob part has a sufficient size, it is easy to pick with a finger, and it is also excellent in the beauty of the opening. 4: The tearing line formed at the first weakening line and the second weakening line has unevenness, and the opening is open. Is slightly inferior,
The knob part has a sufficient size and is easy to pinch with a finger; 3; the tear line formed at the first weakening line and the second weakening line is notably uneven, and the appearance of the opening is inferior; Is not large enough to be pinched with fingers, 2; the gap between the tear lines formed at the first weakening line and the second weakening line is small, and the knob portion has a sufficient size. It is shown in Table 1 based on the evaluation criteria that it is slightly difficult to pick with a finger because it is not included; 1; the tear lines are perfectly matched, no knob portion is formed at all, and it is very difficult to pick with a finger.

[0061]

[Table 1]

As is evident from the results shown in Table 1, the packaging bags of the present invention in Examples 1 to 5 are arranged such that the first line of weakness is shifted in the vertical direction with respect to the second line of weakness. Therefore, it was confirmed that the knob portion was formed so as to protrude from the opening portion after opening, and the knob portion could be pinched with a fingertip, and the opening portion could be easily opened and closed.

In particular, it is preferable that the distance between the first weakening line and the second weakening line is 3 mm and 5 mm, and that the number of 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 the preferred embodiment can easily open and close the opening, and the tearing line is formed neatly, so that the appearance of the opening is good.

[0064]

As described above, according to the packaging bag of the present invention, an appropriate amount of the opening of the packaging bag after the opening is opened based on the difference between the first weakening line and the second weakening line. Since the knob portion is formed and the knob portion can be easily pinched with a fingertip, the packaging bag can be easily opened and the opening and closing operation of the opening after opening can be easily performed. The body can be provided.

[Brief description of the drawings]

FIG. 1 is a front view showing a preferred embodiment of a packaging bag according to the present invention.

FIG. 2 is a development view of the packaging bag shown in FIG.

3 is an enlarged schematic cross-sectional view of the packaging bag shown in FIG. 1 when viewed from a direction perpendicular to the direction of each weakening line.

FIG. 4 is a schematic diagram showing an actual cut line (tear line) formed at a first weakening line and a second weakening line when the packaging bag shown in FIG. 1 is opened.

FIG. 5 is a front view showing a state after opening the packaging bag shown in FIG. 1;

6 is a development view of the packaging bag after opening shown in FIG.

FIG. 7 is a developed view showing a second embodiment of the packaging bag according to the present invention.

FIG. 8 is a schematic sectional view showing a third embodiment of the packaging bag according to the present invention.

FIGS. 9A and 9B are a front view and a development view showing a state before opening a conventional packaging bag, respectively.

10A and 10B are a front view and a developed view showing a state after opening a conventional packaging bag, respectively.

[Explanation of symbols]

10: packaging bag, 10A: first surface of packaging bag, 10
B: Second surface of the packaging bag, 10a: Sealed portion of the first surface 10A of the packaging bag, 10b: Second surface 10 of the packaging bag
B seal part, 12 ... paper with weak line formed, 14 ...
Plastic film (sealing layer), 16: aluminum foil (sealing layer), 18: composite packaging material, 20: first weakening line (in case of deformed perforation), 22-26: weakening line constituting first weakening line , 30... Second weakening line (in the case of deformed perforation), 32-36... Weakening line constituting the second weakening line, 40... Plastic fastener (seal means), 40 a. , 40
female part of b ... plastic fasteners, 50 ... notch (cut), 60 ... open port, 70 ... knob portion can after opening, L ₂₀ ... tear line can at the site of the first weakening line upon opening, the at L ₃₀ ... when opening The tear line formed at the portion of the second weakening line, L ₅₀ ... the tearing direction of the packaging bag, S ₅₀ ... the tearing start direction of the packaging bag, X ... the central axis when the packaging bag is deployed, W ₁ ... The width of the cut of the weakening line, W ₂ … the width of the seam of the weakening line, W ₃ … the interval between the weakening lines constituting the first weakening line or the second weakening line, W _20-30 … the first weakening line The distance between the edge on the second line of weakness and the edge on the first line of weakness of the second line of _weakness , W _40A ... width of the male part of the plastic fastener, W
_40B ... width of female part of plastic fastener, 100 ...
Conventional packaging bag, 100A ... conventional packaging bag 100
1st surface, 100B ... second surface of conventional packaging bag 100, 200 ... first weakening line of conventional packaging bag 100 (in case of perforation), 300 ... conventional packaging bag 100
A second weakening line (in the case of perforation processing), 400: an opening, 500: an edge portion along the second weakening line 200 after opening, 600: an edge portion along the second weakening line 300 after opening.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masachika Imamura 408, Tashiro-Daigakucho, Tosu City, Saga Prefecture Hisamitsu Pharmaceutical Co., Ltd. (72) Inventor Noboru Tomiyoshi 1-5-1, Taito, Taito-ku, Tokyo Letterpress Printing Co., Ltd. F-term (reference) 3E064 AA05 BA17 BA21 BB03 EA30 HN13 HP01 HP02 3E067 BA12A BB14A BB25A CA04 EA23 EB03 EB05 EB06

Claims (8)

[Claims] 1. A packaging bag having a first line of weakness for opening provided on one of a pair of opposing surfaces and a second line of weakness for opening provided on the other surface, wherein A bag for packaging, characterized in that one weakening line is arranged so as to be shifted from the second weakening line in a direction perpendicular to the second weakening line. 2. 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. The packaging bag according to claim 1. 3. The packaging bag according to claim 1, wherein the first weakening line and the second weakening line have deformed perforations. 4. The method according to claim 1, wherein each of the first weakening line and the second weakening line is formed as an aggregate including 1 to 10 weakening lines. The packaging bag according to the above. 5. An end of the first weakening line, an end of the second weakening line, or a portion formed between an end of the first weakening line and an end of the second weakening line. The packaging bag according to any one of claims 1 to 4, further comprising a notch for opening. 6. The packaging bag body has at least one sealing layer that stably holds an article to be packaged in an airtight state, and at least one of the first weakening line and / or the second weakening line.
The packaging bag according to any one of claims 1 to 5, wherein the packaging bag is formed of a composite packaging material including two layers. 7. The packaging bag according to claim 6, wherein the sealing layer is an aluminum layer. 8. The packaging bag according to claim 1, further comprising sealing means for sealing the opening after opening.