JP2017052528A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a versatile packaging bag which has stable opening properties, has a beautiful cut area, and can easily be re-opened even with a re-sealing means provided.SOLUTION: A packaging bag formed by overlapping a surface film 2 and a rear film 3 and sealing peripheral edge parts of the overlapped surface film and the rear film includes a re-sealing part 4 on a facing position on an inner face of the surface film and the rear film and is provided with easily-cutting lines 5 for guiding the cutting in opening respectively on the surface film and the rear film on the upper end side with respect to the re-sealing part. The easily-cutting line has branching easily-cutting lines which branch upward and downward and converge. In the packaging bag, the branching easily-cutting line 26 on the surface film and the branching easily-cutting line 36 on the rear film are formed in positions shifting in a lateral direction in a plan view state of the packaging bag.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag, and in particular, relates to a packaging bag having a resealing means at an opening and excellent in opening and reopening properties.

  Conventionally, in order to make it easier to open the packaging bag containing the contents, notches are provided at both the left and right ends of the opening line of the packaging bag, or at either end, and a straight half cut is made on the opening line. There was a packaging bag provided on each of the two front and back films of the packaging bag. These packaging bags can be easily torn and opened by picking up and down the notch with fingers and pulling along easy-to-cut lines such as a straight half-cut.

  However, such a packaging bag can be easily opened, but when opening the mouth to take out the contents, the tearing line of the packaging bag is in the same position on the front and back films, In order to open the mouth, it was difficult to put the finger between the overlapped front and back films, and it was not possible to open the mouth easily even if each of the films on the front and back sides was picked with fingers.

  In addition, in the case of a packaging bag in which a resealing means such as a synthetic resin fastener is attached in the vicinity of the opening so that it can be resealed even after opening, between the opening and the resealing means. A scheduled opening line will be provided. In this case, particularly when the resealing means is closed, the space between the front and back films becomes very narrow, and thus the problem that it is difficult to put a finger between the front and back films appears more conspicuously.

  In order to avoid this, packaging with different opening schedule lines on the front and back films, so that the opening line after opening is not in the same position on the front and back films, and easy opening with a finger There was a bag.

  For example, in the packaging bag shown in Patent Document 1, only one of the front and back films is a synthetic resin sheet having a crystal region alignment direction, so that the front and back films are not aligned at the time of opening. . Thereby, since the opening line in a front and back film differs, it is easy to pick with a finger.

  However, in a packaging bag like patent document 1, the cut end of the sheet | seat which does not have arrangement directionality is uneven, and is unpreferable on an external appearance. In addition, since there is no planned opening line, there is a problem that a tear is formed and a stable opening is not expected.

Then, the packaging bag which makes not only the position of the opening line of a front and back film different but also the opening line is beautiful has been examined (patent document 2).
The packaging bag shown by patent document 2 provides the 1st score line in one outer layer of the front and back films of a packaging bag, and the 2nd score line in the other outer layer, and each score line is one side of an edge adhesion part. The first cut line is a straight line that penetrates the left and right side edge parts, and the other straight line that branches off from the end point of one straight line part. It is composed of a plurality of score lines that converge at the end point of the part, and the plurality of score lines are composed of a score line that swells on the upper end side and a score line that swells on the lower end side. It is.

  In Patent Document 2, by adopting the above-described configuration, a beautiful unsealed line can be obtained without deviating from the score line in any unsealing direction when tearing to the near side or when tearing to the back side. In addition to being obtained, it is disclosed that since the opening line is different in the front and back films, it can be easily picked with a finger at the time of opening.

  Patent Document 2 describes that a resealing means using an occlusion tool may be provided, and the resealing means is provided on the lower end side of the first cut line and the second cut line. It is said.

However, in a packaging bag like patent document 2, when a user tears to the near side, it will open along the cut line which swells to the lower end side of the 1st cut line, and the cut line and occlusion implement Since the distance between the front and back films becomes shorter, there is a problem that even if an attempt is made to open a finger at a position where the opening line is different between the front and back films, the length of the front film is too short to insert the finger.
When the user tears away from the back, it can be opened along the cut line that swells to the upper end of the first cut line, but it depends on which user the user tears in which direction. However, it was not a versatile packaging bag that could be easily opened.

JP 2003-072775 A JP 2012-096839 A

  The present invention has been made in view of the above circumstances. Even in a packaging bag having resealing means, it has a stable opening property, has a beautiful cut end, and is easy to resume. It is an object to provide a high packaging bag.

  This invention is made in view of the subject which concerns, The packaging bag of this invention is a packaging bag which overlap | superposed the front film and the back film, and sealed the peripheral part of the said front film and the said back film which overlap | superposed. In addition, a re-sealing portion is provided at a position where the inner surfaces of the front film and the back film are opposed to each other, and the cutting at the time of opening is guided to each of the front film and the back film on the upper end side from the re-sealing portion. An easy-cut line is provided, the easy-cut line has a branch easy-cut line that branches up and down and converges, and the branch easy-cut line of the front film and the branch easy-cut line of the back film The formation position of the packaging bag in a plan view is shifted to the left and right.

  Moreover, the packaging bag of this invention WHEREIN: In the planar view state of the said packaging bag, the said branch easy-cut line of the said surface film and a part of said branch easy-cut line of the said back film may overlap.

  Moreover, the said branch easy cut line of the packaging bag of this invention may be multiply formed in at least one of the said front film and the said back film.

In addition, at least one of a branch point and a convergence point of the branch easy-cut line of the packaging bag of the present invention may be provided at an inner edge of the seal portion.
Moreover, the branch point and the convergence point of the easy-to-branch cut line may be formed inside the seal part at the side end of the packaging bag.

The packaging bag of the present invention may have at least one straight easy cutting line from at least one of the branching point and the convergence point of the branching easy cutting line toward the side end of the packaging bag. The straight easy-cut line may be continuously formed from at least one of the branch point and the convergence point to the side end of the packaging bag, or toward the side end of the packaging bag. The straight easy-to-cut line may be provided so as to be separated into a plurality of upper and lower parts at the side end of the packaging bag.
At this time, the straight easy-cut lines that are separated into a plurality of upper and lower parts may converge to one inside the seal portion of the packaging bag.

  Moreover, the opening edge start means used as the trigger of opening may be provided in the outer edge of the seal part of the side end of the packaging bag of this invention.

In the packaging bag of the present invention, the easy-branching line is formed on each of the front and back films. Is opened along the easy-cutting line branched downward, and the easy-branching line of the back film is opened along the easy-cutting line branched upward. Similarly, when the user tears to the back side, the easy-branching line of the front film is opened along the easy-cutting line branched upward, and the easy-branching line of the back film is opened. It will be opened along an easy-cut line that branches downward.
Thereby, the opening line along the easy-cut line branched to the upper side is always obtained for either of the front and back films.

  In addition, the position of the easy-to-branch line formed on each of the front and back films is shifted to the left and right, so that it is formed on the back film in the case of tearing to the front, along the easy-to-cut line branched to the upper side. Since the opening film at a position sufficiently away from the re-sealing part can be obtained on the front film at a position facing the opening line, each of the front and back films is picked and a finger is easily put between the front and back films. And re-sealing can be performed easily.

When a part of the easily branched line formed on each of the front and back films overlaps, the easily branched line can be provided at a position closer to the center than the side end of the packaging bag, or formed widely Therefore, the position for inserting a finger between the front and back films at the time of resealing can also be set to a position close to the center or set wide sideways, which can further enhance convenience.
In addition, in a position facing the apex portion of the unsealing line along the easy cutting line branched upward by making the overlap of the branch easy cutting line only a part, a position sufficiently away from the reseal portion Therefore, it becomes possible to easily put a finger between the front and back films.

  In addition, in the case where a plurality of the easy-branching lines are formed on at least one of the front film and the back film, it is possible to form two or more easy-cutting lines branched upward on one film. Therefore, the user can select the position to insert the finger at the time of resealing, and the convenience can be further improved.

When at least one of the branch point and the convergence point of the easy-to-branch cut line is formed on the inner edge of the seal portion at the side end of the packaging bag, the front and back surfaces are sealed from the seal portion where the front and back films are sealed and slightly hard The film is separated and the unsealing progresses smoothly, or the easy cutting line that splits into two branches starts or ends at the conversion point that enters the slightly hard seal portion from where the film has proceeded smoothly. Here, when the user opens the packaging bag, the hardness changes at the inner edge of the seal portion that proceeds inward from the seal portion, and the opening speed is increased. Therefore, since the load at the time of starting the easy-cutting line divided into two forks slightly deviating from the direction of the tearing force of the user can be reduced, the opening can be further facilitated.
Similarly, when proceeding from the inside of the seal portion to the seal portion, the easy cutting line that is divided into the inner edge of the seal portion and the bifurcated portion is converged with the change in hardness. Therefore, opening after the convergence point can be smoothly advanced without the user's intention.

  In addition, when the branching point and the convergence point of the branching easy cutting line are formed on the inner side of the seal portion at the side end of the packaging bag, the branching easy cutting line is formed closer to the center of the packaging bag. Therefore, the position where the finger is inserted between the front and back films at the time of resealing is also close to the center, and the convenience can be further improved.

  Further, the packaging bag of the present invention has at least one straight easy cutting line from at least one of the branching point and the convergence point of the branching easy cutting line toward the side end of the packaging bag, so that the packaging It becomes possible to guide the opening more smoothly from the side end of the bag to the easy-to-branch cutting line, and it is possible to surely form an opening line along the easy-cutting line branched to the upper side.

  In addition, the straight easy-cut line is continuously formed from at least one of the branch point and the convergence point to the side end of the packaging bag, thereby branching upward from the start of opening. It becomes possible to guide more smoothly and surely until the opening line along the easy-cut line is formed.

  Moreover, when providing the said linear easy cut line in multiple numbers up and down, it is preferable that it is the shape separated up and down in the side edge part vicinity of the said packaging bag. Even if the opening start position is slightly deviated from the desired position due to the plurality of straight easy-cut lines being divided into upper and lower parts, the straight easy-cut lines are guided to any of the straight easy-cut lines. It becomes possible to proceed with the opening along.

Moreover, it is preferable that the said several linear easy cut line has converged to one inside the seal part of the said packaging bag. This is because when the plurality of straight easy-cut lines form a shape that is vertically separated even inside the seal portion, the vertical width thereof becomes larger than necessary toward the side end of the packaging bag. And it may become longer until it is guided to the straight easy-cut line from the start of opening, or when opening along the lower straight easy-cut line is performed, This is because there is a risk of becoming close to the sealing portion.
On the other hand, in the present invention, by converging the plurality of straight easy-cutting lines into one inside the seal portion of the packaging bag, there is no fear of the above, and a finger can be easily inserted at the time of resealing. It is possible to proceed with opening smoothly while forming an opening line.

  In addition, since the opening start means for triggering the opening is provided at the outer edge of the sealing portion at the side end of the packaging bag, the opening can be started with a small force, and the opening is smoother. Can be performed.

It is explanatory drawing which showed typically 1st Embodiment of the packaging bag of this invention. It is explanatory drawing which showed typically the case where a linear easy cut line is not provided in the side edge part of a packaging bag among 1st Embodiment of the packaging bag of this invention. It is explanatory drawing which showed typically the state which opened the packaging bag of FIG. (A) shows a state when the packaging bag is torn to the back from the left end to the right end, and (b) shows a state when the packaging bag is torn from the left end to the right end. It is explanatory drawing which showed typically 2nd Embodiment of the packaging bag of this invention. (A) shows the state before opening the packaging bag, and (b) shows the state where the packaging bag is torn from the left end to the right end and opened. It is explanatory drawing which showed typically 3rd Embodiment of the packaging bag of this invention. (A) shows the state before opening the packaging bag, and (b) shows the state where the packaging bag is torn from the left end to the right end and opened. It is explanatory drawing which showed typically the left side of the packaging bag which changed the position of the branch easy-opening line among the 1st-3rd embodiment of the packaging bag of this invention. It is explanatory drawing which showed typically 4th Embodiment of the packaging bag of this invention.

<First Embodiment>
Hereinafter, a first embodiment for carrying out the present invention will be described with reference to FIGS.

  The packaging bag 1 according to the first embodiment is a packaging bag 1 in which a front film 2 and a back film 3 are overlapped, and the peripheral portions of the overlapped front film 2 and back film 3 are sealed to form a seal portion 8. is there.

The front film 2 and the back film 3 may be constituted by two separate films as shown in FIG. 1 or may be constituted by folding one film by providing a folding portion at the lower end. .
Moreover, it is good also as a self-supporting bag by inserting the bottom tape folded in half into the lower end of the front and back films and sealing the folded portion up. What is necessary is just a bag in which the seal part was provided in the left and right side ends.

  As the front film 2 and the back film 3, a soft packaging film used in a general packaging bag can be used. As a layer configuration, a laminated film in which a base material layer and a sealant layer are bonded together is generally used, and the base material layer and the sealant layer may be further laminated in multiple layers.

  For the base material layer, a biaxially stretched resin such as nylon, polyethylene terephthalate, or polypropylene, or a uniaxially stretched or unstretched plastic film can be preferably used. In addition, when printing processing is accompanied, a biaxially stretched film is more preferable. As for the thickness of a base material layer, about 12-50 micrometers is preferable.

Various barrier films can also be used as the base material layer. Moreover, you may provide a base material layer in a multilayer by combining various barrier films and the above-mentioned plastic film. Furthermore, a metal foil such as an aluminum foil can also be provided as one layer of a multilayer base film.
Examples of various barrier films include polyvinylidene chloride films, polyvinyl alcohol films, ethylene vinyl alcohol copolymer films, gas barrier nylon films, gas barrier polyethylene terephthalate (PET) films, etc., and PET films, such as aluminum. A metal vapor-deposited film obtained by vapor-depositing these metals, an inorganic oxide vapor-deposited film obtained by depositing an inorganic oxide such as aluminum oxide or silicon oxide on a PET film, or the like is preferably used.

  A heat-meltable resin is used for the sealant layer. Polypropylene, low density polyethylene, linear low density polyethylene, acid-modified polyethylene, or the like is used. A multilayer coextruded film may be used for the sealant layer. As the sealant layer of the multilayer coextruded film, a low-density polyethylene or high-density polyethylene as an intermediate layer and a linear low-density polyethylene layer provided on both sides is preferably used.

  The thickness of the sealant layer is adjusted depending on the amount of the content, but a thickness of 80 μm to 200 μm is preferable, and 100 μm to 150 μm can be preferably used.

  Moreover, the pattern printing layer can be provided on the back surface of the base material layer. Moreover, in the case of a multilayer base material layer, it is preferable to provide a pattern printing layer on the outermost film of the base material layer. The printing method for providing the pattern printing layer is not particularly limited, but gravure printing or flexographic printing is usually used.

  As shown in FIG. 1, the packaging bag 1 has a reseal portion 4 at a position where the inner surfaces of the front film 2 and the back film 3 face each other, and the front film 2 and the back film on the upper end side from the reseal portion 4. Each of 3 is provided with an easy-to-cut line 5 that guides cutting at the time of opening.

  The easy cutting line 5 can be provided as a half-cut line. The half-cut line can be put into the base material layer from the front side using a metal blade such as a roll. In this case, even if the blade is in the middle of the base material layer, the blade may be in the middle of the sealant layer beyond the base material layer.

  Moreover, it can provide by the laser processing which irradiates a half cut line from the base material layer side. A carbon dioxide laser is preferably used as the laser to be used. In the case where the half-cut line is provided by laser processing, the half-cut line may be provided on the inner layer of the base material layer so as not to be provided on the outermost layer of the multilayer base material layer.

The easy-cutting line 5 is divided into the easy-to-branch lines 26 and 36 that branch up and down and converge, and the straight easy-to-cut line 27 that extends from the branching point and the convergence point of the branching easy-cutting lines 26 and 36 toward the side end of the packaging bag 1. , 37. The front film branch easy cut line 26 and the back film branch easy cut line 36 are provided on the front and back sides at substantially the same position on the upper and lower sides and shifted to the left and right. The straight easy-to-cut line 27 of the front film and the straight easy-to-cut line 37 of the back film are provided on the front and back, and the upper and lower sides are provided at substantially the same position.
In the first embodiment, the straight easy cutting lines 27 and 37 are formed on both the front and back films so as to connect the end portions on both sides of the packaging bag 1 and the branch easy cutting lines 26 and 36. The film may be provided only on one of the front and back films, or, for example, by uniaxially stretching at least one of the front film 2 and the back film 3 or by aligning the crystal direction. If the direction opening is improved, the desired effect of the present invention can be obtained without providing the straight easy-to-cut lines 27 and 37.
In addition, as an example which changes the formation area of the linear easy cut lines 27 and 37, as shown in FIG. 2, the branch easy cut lines 26 and 36 of the surface film 2 and the back film 3, and the side edge of the packaging bag 1 and The form which does not form in the area | region between can be considered. Here, in order to obtain the desired effect of the present invention more reliably, the straight easy-to-cut lines 27 and 37 are provided on the films facing at least the branch points and the convergence points of the easily-branched lines 26 and 36. It is preferable. This is because the straight easy-cut lines 27 and 37 are formed at positions facing the branch point and the convergence point of the easy-branch lines 26 and 36, so that different opening lines can be reliably obtained on the front and back films. Because.

  The distance from the re-sealing part 4 of the straight easy cutting lines 27 and 37 is set so as to be long enough to be picked with a finger at the time of resealing. Specifically, a length of 2 mm to 20 mm is preferable. If it is less than 2 mm, it becomes difficult for the user to pick it up with a finger when resealing, and if it is greater than 20 mm, waste as a packaging bag increases, leading to high manufacturing costs.

In the present embodiment, the branching easy cutting lines 26 and 36 form an upward and downward convex arc with respect to the extended line of the linear easy cutting lines 27 and 37. Any shape that converges is acceptable. Here, the upper branch easy-cut line 61 that branches upward and the lower branch easy-cut line 62 that branches downward are in relation to the extension lines of the straight easy-cut lines 27 and 37 in the vicinity of the branch point and the convergence point. It is necessary to form them so that they are divided into upper and lower forks. If it is formed on the extension line of the straight easy-to-cut lines 27 and 37 in the vicinity of the bifurcation point and the convergence point, it is formed on the extension line regardless of the opening method of the user. This is because there is a possibility that a desired opening line may not be obtained because it is preferentially guided to the easy opening line.

The upper branch easy cut line 61 and the lower branch easy cut line 62 may have a vertically symmetrical shape as in the present embodiment, or may have different shapes. Moreover, it is not necessary to make it the same size and shape by the front and back.
The upper branch easy cut line 61 may be formed by one or a plurality of wavy lines, for example, as long as a portion protruding upward with respect to the extended line of the straight easy cut lines 27 and 37 can be picked with a finger. It is also possible, and the middle may be linear. Further, the lower branch easy-cut line 62 is lower than the extended lines of the straight easy-cut lines 27 and 37 near the branch point and the convergence point so that a desired opening line can be obtained by the user's opening method. It suffices if it is formed.

  The distance between the extension lines of the straight easy cutting lines 27 and 37 at the apex portion where the upper branch easy cutting line 61 protrudes upward from the extension lines of the straight easy cutting lines 27 and 37 is 1 to 5 mm. Is preferred. If it is less than 1 mm, there are too few steps on the opening lines of the front and back films, and it becomes difficult for the user to pick them up with their fingers when resealing. When the angle between the direction of the tearing force that has been opened along the upper side and the upper branch easy-cut line 61 becomes large, the opening along the upper easy-cut line 61 becomes difficult.

Moreover, the opening start means 50 which goes inward from the outer edge of the right-and-left side edge of the packaging bag 1 is provided in the left-right position of the straight easy-to-cut line 27 of the front film, and the straight easy-to-cut line 37 of the back film. . In the present embodiment, the opening start means 50 is provided by scratching made of a short straight line in the lateral direction, but is not limited thereto, and may be provided by a notch such as a V notch or an I notch, or may be another. .
In the present embodiment, the opening start means 50 is provided on both the left and right sides so that the user can start opening from either the left or right side. You may make it guide to.

When the user opens the packaging bag 1, for example, when tearing from the left end to the right end with the front film 2 as the front surface, the tear starts from the opening start means 50 and proceeds along the straight easy cutting lines 27 and 37, and the front film branches. The branch point of the easy cutting line 26 is reached.
At this time, depending on the manner in which the user's tearing force is applied and the directionality, it may be torn to the front or to the back, depending on whether it is torn along the upper or lower branch easy cutting line 61, 62. Different.

  When the user tears to the back side, after reaching the branching point of the easy branching line 26 of the front film 2, the opening proceeds along the upper branching easy cutting line 61. During this time, the back film 3 is being opened along the straight easy-to-cut line 37. Then, after reaching the convergence point of the front film branch easy cut line 26, both the front and back films are opened along the straight easy cut lines 27 and 37, and reach the branch point of the back film easy branch line 36. . Then, opening progresses along the lower branch easily cut line 62 of the back film, and reaches the convergence point of the easily branched line 36. Thereafter, both the front and back films are opened again along the straight easy-to-cut lines 27 and 37, reach the right end of the packaging bag 1 and the upper portion of the packaging bag is removed to complete the opening. Thereby, the opening lines 29 and 39 as shown to Fig.2 (a) are obtained.

The user uses the step generated between the convex opening line 29 formed on the left side of the front film 2 and the linear opening line 39 of the back film 3 facing the upper opening line 2, to thereby apply the front film 2. And by picking the back film 3 with fingers and spreading it back and forth or up and down and inserting the fingers between the front and back films, the packaging bag 1 can be easily re-sealed even when the reseal portion 4 is closed It becomes possible to do.
This is because the distance between the convex opening line 29 and the resealing part 4 formed on the front film 2 and the linear opening line 39 and the resealing part formed on the back film 3 at the opposite positions. Both of the distances between 4 can be achieved by having a length sufficient for the user to pinch with a finger and insert the finger between the front and back films.

  On the other hand, when the user tears forward, as shown in FIG. 2 (b), the opening film 29 that protrudes downward on the left side of the front film 2 and the opening line that protrudes upward on the right side of the back film 3 are provided. 39 is obtained. The user uses the step formed between the downwardly opened opening line 39 formed on the right side of the back film 3 and the linear opening line 29 of the surface film 2 opposite to the opening line 39. And by picking the back film 3 with fingers and spreading it back and forth or up and down and inserting the fingers between the front and back films, the packaging bag 1 can be easily re-sealed even when the reseal portion 4 is closed It becomes possible to do.

<Second Embodiment>
Hereinafter, a second embodiment for carrying out the present invention will be described with reference to FIG.

  The packaging bag 10 of 2nd Embodiment is 1st Embodiment except being provided in the position where a part of the branch easy cutting line 26 of the front film 2 and the branch easy cutting line 36 of the back film 3 overlap. This is the same as the packaging bag 1.

  In the packaging bag 10 of the present embodiment, the overlapping width of the easy-to-branch cutting lines 26 and 36 is set in consideration of the relationship between the opening lines 29 and 39 of the front and back films.

  When opening the packaging bag 10 shown in FIG. 3 (a), for example, when tearing from the left end to the right end with the front film 2 as the front, it starts to tear from the opening start means 50 and proceeds along the straight easy cutting lines 27, 37, The branch point of the easy-branching line 26 of the front film is reached.

  When the user tears to the back side, after reaching the branching point of the easy branching line 26 of the front film 2, the opening proceeds along the upper branching easy cutting line 61. During this time, the back film 3 is being opened along the straight easy-to-cut line 37. Then, on the way to the convergence point of the easy-branch line 26 of the front film 2, the branch point of the easy-branch line 36 of the back film 3 is reached. Then, the opening of the back film 3 along the lower branch easily cut line 62 proceeds, and the front film 2 reaches the convergence point of the branch easily cut line 26. The front film 2 is opened along the straight easy-to-cut line 27, and the back film 3 reaches the convergence point of the branch easy-to-cut line 36. Thereafter, both the front and back films are opened again along the straight easy-to-cut lines 27 and 37, reach the right end of the packaging bag 10, and the upper portion of the packaging bag is removed to complete the opening. Thereby, the opening lines 29 and 39 as shown in FIG.3 (b) are obtained.

The user uses the step generated between the convex opening line 29 formed on the left side of the front film 2 and the linear opening line 39 of the back film 3 facing the upper opening line 2, to thereby apply the front film 2. And by picking the back film 3 with fingers and spreading it back and forth or up and down and inserting the fingers between the front and back films, the packaging bag 10 can be easily re-sealed even when the reseal portion 4 is closed It becomes possible to do.
This is because the distance between the convex opening line 29 and the resealing part 4 formed on the front film 2 and the linear opening line 39 and the resealing part formed on the back film 3 at the opposite positions. Both of the distances between 4 can be achieved by having a length sufficient for the user to pinch with a finger and insert the finger between the front and back films.

Here, when the overlap between the front and back film easy-to-branch cutting lines 26 and 36 increases, a downwardly opened opening 39 is formed on the back film 3 at a position facing the upwardly protruding opening 29. . The downwardly convex opening line 39 has a short distance from the re-sealing portion 4 at the apex portion, and it is difficult for the user to pick with fingers or put the finger between the front and back films at the time of resealing. turn into.

  Therefore, it is preferable that the overlap width of the easy-branch cutting lines 26 and 36 on the front and back films is 5 mm or less. If it is larger than 5 mm, the distance between the apex portion of the upwardly open opening line 29 and the apex portion of the downwardly open opening line 39 becomes short, and the user picks it with a finger when reopening or between the front and back films. It becomes difficult to put your finger.

<Third Embodiment>
Hereinafter, a third embodiment for carrying out the present invention will be described with reference to FIG.

  The packaging bag 20 of the third embodiment is the same as the packaging bag 1 of the first embodiment, except that two branch easy-cut lines 26 of the front film 2 are provided as shown in FIG. It is the same.

  In the present embodiment, the front film 2 is provided with two easy-to-branch cut lines 26 and the back film 3 is provided with one easy-to-branch cut line 36. The number of the easy-to-branch cutting lines 26 and 36 on the front and back films may be the same or different. Of course, the number of easy-to-branch lines 26 provided on the front film 2 may be smaller than the number of easy-to-branch lines 36 provided on the back film 3.

  Moreover, the easy-branching cutting lines 26 and 36 of a front and back film may be provided so that a part may overlap. However, when the overlap between the front and back film easy-to-branch cutting lines 26 and 36 is increased, a downwardly opened opening 39 is formed on the back film 3 at a position facing the upwardly protruding opening 29 when opened. Thus, the downwardly opened opening line 39 has a short distance from the re-sealing part 4 at the apex portion, and the user picks it with a finger or puts the finger between the front and back films at the time of resealing. Therefore, it is preferable that the width of the overlap between the easy-to-branch cutting lines 26 and 36 of the front and back films is 5 mm or less. If it is larger than 5 mm, the distance between the apex portion of the upwardly open opening line 29 and the apex portion of the downwardly open opening line 39 becomes short, and the user picks it with a finger when reopening or between the front and back films. It becomes difficult to put your finger.

  When the user opens the packaging bag 20, for example, when tearing from the left end to the right end with the front film 2 as the front surface, the tear starts from the opening start means 50 and proceeds along the straight easy cut lines 27 and 37, and the front film branches. The branch point of the easy cutting line 26 is reached.

  When the user tears to the back side, after reaching the branching point of the easy branching line 26 of the front film 2, the opening proceeds along the upper branching easy cutting line 61. During this time, the back film 3 is being opened along the straight easy-to-cut line 37. And after reaching the convergence point of the branch easy-to-branch line 26 of the front film, it reaches the branch point of the branch easy-to-branch line 36 of the back film. Then, opening progresses along the lower branch easily cut line 62 of the back film, and reaches the convergence point of the easily branched line 36. During this time, the surface film 2 is being opened along the straight easy-to-cut line 27. Thereafter, the branching point of the easy-branching line 26 of the surface film 2 is reached again, and the unsealing proceeds along the upper easily-branching line 61. During this time, the back film 3 is being opened along the straight easy-to-cut line 37. And after reaching the convergence point of the branch easy-to-branch line 26 on the front film, both the front and back films are opened again along the straight easy-to-cut lines 27 and 37, reach the right end of the packaging bag 20 and the upper part of the packaging bag is Opening is completed by removing. Thereby, the opening lines 29 and 39 as shown in FIG.4 (b) are obtained.

The user uses a step formed between one of the convex opening lines 29 formed on the left and right sides of the front film 2 and the linear opening line 39 of the back film 3 opposed thereto. The front and rear films 2 and 3 are picked up with fingers, spread forward and backward or vertically, and inserted between the front and back films, so that the re-sealing part 4 can be easily closed even in a closed state. 20 can be sealed again.
This is because the distance between the convex opening line 29 and the resealing part 4 formed on the front film 2 and the linear opening line 39 and the resealing part formed on the back film 3 at the opposite positions. Both of the distances between 4 can be achieved by having a length sufficient for the user to pinch with a finger and insert the finger between the front and back films.

  In addition, since there are two convex opening lines 29 on the left and right sides, the user can select a position to open by picking up with a finger when reopening, so that the packaging bag can be made more convenient. .

  Although the 1st-3rd embodiment has been described so far, the position of the branching point and the convergence point of the easy-branching line 26 of the front film 2 is the side of the packaging bags 1, 10, 20 as shown in FIG. 5. The inner edge of the end seal part 8 or the inner side of the side end seal part 8 is preferable. In addition, although not shown in FIG. 5, the position of the branch point and the convergence point of the branch easy-to-brake line 36 of the back film 3 is also the inner edge of the side end seal portion 8 or the inner side of the side end seal portion 8. It is preferable.

Assuming that the user opens the front film 2 from the left end to the right end with the front film 2 as the front surface, in FIG. 5A, the branch point of the branch easy-cut line 26 of the front film 2 is on the inner edge of the seal portion 8 on the left end. The position is shown.
In this case, the conversion point where the front and back films are separated from the seal portion 8 where the front and back films are sealed and slightly opened and the opening starts smoothly, and the branching point of the branch easy-cut line 26 which is divided into two branches coincide. .

  When the user opens the packaging bag of FIG. 5A, the hardness changes at the inner edge of the seal portion 8 and the opening speed is increased. Therefore, the load at the start of the easy-to-branch cutting line 26 that slightly deviates from the direction of the user's tearing force is reduced, and opening can be facilitated more easily.

  Moreover, in FIG.5 (b), the state where both the branching point and the convergence point of the branch easy cutting line 26 of the surface film 2 are located inside a seal | sticker part is shown. In this case, since the easy-to-branch cutting line 26 can be formed near the center of the packaging bag, the position where the finger is inserted between the front and back films at the time of re-sealing is also close to the center, further enhancing convenience. It becomes possible.

<Fourth Embodiment>
Hereinafter, a fourth embodiment for carrying out the present invention will be described with reference to FIG.

  The packaging bag 30 according to the fourth embodiment has an upper straight easy cutting line 71 and a lower straight line so that the straight easy cutting lines 27 and 37 of the front and back films are separated into a plurality of upper and lower parts at the side ends of the packaging bag 30. Except that the easy cutting line 72 is provided, it is the same as the packaging bag 1 of the first embodiment. In addition, in the packaging bag 30 of this embodiment, although the linear easy cutting lines 27 and 37 of both the left and right side edge parts of the packaging bag 30 are separated into a plurality of upper and lower parts, either one of the left and right sides may be used.

  In FIG. 6, the right straight easy-cut lines 27 and 37 are divided into an upper straight easy-cut line 71 and a lower straight easy-cut line 72 in the region of the seal portion 8, and the seal portion 8 and the seal portion are on the left side. A part of the area inside 8 is divided into a plurality of upper and lower parts. In this way, the position where the straight easy cutting lines 27 and 37 are separated into a plurality of upper and lower parts may be only the seal part 8 or may reach a partial region inside the seal part 8.

However, even when it is divided into the upper straight easy-to-cut line 71 and the lower straight easy-to-cut line 72 up to a partial region inside the seal portion 8, the region extends to the vicinity of the seal portion 8. And it is desirable not to reach the vicinity of the center of the packaging bag 30.
In the case where the straight easy-cut lines 27 and 37 are vertically separated until reaching the center of the packaging bag 30, the vertical width of the packaging bag 30 is more than necessary as it goes to the side end. And when it is opened along the lower straight easy-cut line 72, the opening line is opened. This is because there is a risk that the re-sealed portion 4 becomes close.

  Even if the opening start position is slightly deviated from the desired position, the straight easy cutting lines 27 and 37 are separated from each other at the side end portion of the packaging bag 30. , 72 and the opening along the easy-cut line can be advanced.

DESCRIPTION OF SYMBOLS 1, 10, 20, 30 ... Packaging bag 2 ... Front film 3 ... Back film 4 ... Reseal part 5 ... Easy cutting line 6 ... Branching easy cutting line 7 ...・ Straight easy cutting line 8... Sealing part 9 .. Opening line 25 .. Easy cutting line 26 of front film... Easy branching line 29 of front film .. Opening line 35 of front film. .. Easy cutting line 36 of the back film ... Easy cutting line 39 of the back film ... Opening line 50 of the back film ... Opening starting means 61 ... Easy cutting line 62 on the upper side ... Lower side Easy branching line 71 ... Upper straight easy cutting line 72 ... Lower straight easy cutting line

Claims (10)

It is a packaging bag in which a front film and a back film are overlapped, and a peripheral edge of the front film and the back film that are overlapped is sealed,
Having a re-sealing part at the opposite position of the inner surface of the front film and the back film,
Each of the front film and the back film on the upper end side from the re-sealing part is provided with an easy cutting line that induces cutting at the time of opening,
The easy cut line has a branch easy cut line that branches up and down and converges,
The packaging bag in which the formation position in the planar view state of the said packaging bag has shifted | deviated to the left and right in the said branch easy cutting line of the said front film, and the said branch easy cutting line of the said back film. The packaging bag according to claim 1,
In the state of the packaging bag in a plan view, a part of the easy-branching line of the front film and the easy-branching line of the back film overlap each other. The packaging bag according to claim 1 or 2,
A packaging bag, wherein a plurality of the easy-branching lines are formed on at least one of the front film and the back film. The packaging bag according to any one of claims 1 to 3,
A packaging bag, wherein at least one of a branch point and a convergence point of the easy-to-branch cutting line is formed on an inner edge of a seal portion at a side end of the packaging bag. The packaging bag according to any one of claims 1 to 3,
The packaging bag, wherein a branch point and a convergence point of the easy-to-branch cutting line are formed on the inner side of a seal portion at a side end of the packaging bag. It is a packaging bag given in any 1 paragraph of Claims 1-5,
A packaging bag comprising at least one straight easy-cut line from at least one of a branch point and a convergence point of the branch easy-cut line toward a side end of the packaging bag. The packaging bag according to claim 6,
The packaging bag, wherein the straight easy-cut line is continuously formed from at least one of the branch point and the convergence point to a side end portion of the packaging bag. A packaging bag according to claim 6 or 7,
The packaging bag, wherein the straight easy-cut line toward the side end of the packaging bag is provided so as to be separated into a plurality of parts at the side end portion of the packaging bag. A packaging bag according to claim 8,
The packaging bag characterized in that the straight easy-cut lines that are separated into a plurality of upper and lower parts converge to one inside the seal portion of the packaging bag. A packaging bag according to any one of claims 1 to 9,
A packaging bag, characterized in that an opening start means for triggering opening is provided at an outer edge portion of a seal portion at a side end of the packaging bag.