JP5958208B2 - Packaging bag - Google Patents

Description

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

  A packaging bag is known in which a resealing means such as a synthetic resin fastener is attached to the opening so that resealing is possible even after opening. The contents are not used all at once, but are suitable for applications where they are used several times.

  Such a packaging bag is generally designed so that the resealing means is horizontally arranged under the top seal part and the space between the top seal part and the reseal means is opened horizontally. Many.

  As the opening method, use a scissors to cut the laminate on the front and back, or use the opening start part such as a U-shaped or V-shaped notch provided on the left and right side seals as a trigger to laminate the front and back The method of tearing the body is common. In the case of tearing, in order to prevent the tear from being bent and hitting the re-sealing means, there is also a type in which a tear line is made in advance so that the tear runs linearly.

  In the case of a packaging bag provided with resealing means, the resealing means is closed in an unopened state, so that the opening is not automatically opened even when the packaging is opened. For this reason, when the laminates on the front and back surfaces are cut at the same position, there is a problem that it is difficult to grasp the trigger when holding the resealing means by hand when opening.

  The packaging bag described in Patent Document 1 is made in order to solve this problem, and by making only one of the front and back laminates a synthetic resin sheet having an alignment direction of the crystal region, The opening of the laminate on the front and back surfaces is not aligned when opened.

  The packaging bag described in Patent Document 1 utilizes the property that the synthetic resin sheet having the alignment direction is linearly split and the other sheet is not so that the cut ends are not aligned. However, the cut edges of the sheet having no alignment direction are not uniform and are not preferable in appearance. In addition, since the rift is a matter of course, it is not always easy to tear so that a stable opening is not expected.

  The opening mechanism of the storage bag described in Patent Document 2 is intended to solve the same problem, but means for solving the problem is that "the cut shape of the opened bag is the front and back of the cut end. It is lacking in concreteness only with "a structure that makes a difference between and".

  In the embodiment of Patent Document 2, a general storage bag with a sealing chuck is provided with a notch, a front side cutting guide kerf for a plurality of bags, and a rear side cutting of a plurality of bags having different shapes. The one with an induction kerf is shown.

  In the example of Patent Document 2, a kerf of different shapes on the front and back surfaces are provided a plurality of respective (three in the figure), even in the provision of the kerf in this order any way, to form a kerf There is a problem that it costs. Moreover, since the cut | notch used as a trigger of opening is only provided in one place on the left side of a bag, it cannot necessarily be said that it is easy to use for people with different right and left hands.

  The packaging bag described in Patent Document 3 is not particularly premised on the re-sealing means, but can be easily torn and opened, the opening line is beautiful, and the position of the opening line on the front and back surfaces is It is a packaging bag that can be easily opened by being different.

  In the packaging bag described in Patent Document 3, the inner layers of the laminated body are overlapped with each other, and one outer layer has a linear cut line extending from one outer edge and the other outer edge of the edge thermal bonding portion, and each linear shape. A first 'cut line comprising a curved cut line having at least one inflection point connecting the end of the cut line is provided, and the other outer layer is similarly formed of a straight cut line and a curved cut line. 1 "A packaging bag characterized in that a cut line is provided, and the positions of the inflection points of the curved cut lines on the front and back surfaces are different.

  In the packaging bag described in Patent Document 3, the meaning of the inflection point is unclear and the exact contents of the invention cannot be grasped. In short, the laminate on the front and back surfaces is straight-curved-straight (or straight-straight-straight). It is considered that the cut lines of the front and back surfaces are not matched.

  In the portion where the straight cut line transitions to the curve or vice versa, the tear is often removed and tends to deviate. This is presumably because the connecting elements are discontinuously viewed microscopically because the graphic elements are different between the straight line part and the curved line part. The tendency to deviate also changes depending on whether the package is opened from the right side or the left side.

  The packaging bag described in Patent Document 4 is made to compensate for the above-mentioned drawbacks of the packaging bag described in Patent Document 3, and is a curved line that protrudes upward from the planned opening line due to the weakening line. Two types of lines selected from three types of lines, one convex curve and a straight line, are formed on the front and back films so that the film tears do not deviate. It is.

  In the packaging bags described in Patent Documents 3 and 4, both the front and rear cut lines (scheduled opening lines) must be matched on the left and right end faces, which is difficult in terms of processing accuracy. If the cut lines on the front and back surfaces are deviated, there is a problem that one of the tears does not proceed as planned and the original opened state cannot be obtained.

  The packaging bag described in Patent Document 5 was made in order to solve the problem that the tear is likely to deviate in the packaging bag described in Patent Document 3, and the layer structure of the laminate is defined as the outer layer, It is characterized by comprising an intermediate layer made of aluminum and an inner layer made of a heat-adhesive resin, and all the inner layers are made of an unstretched film or an unstretched resin layer.

  The packaging bag described in Patent Document 5 pays attention to the fact that the tear is caused by the orientation of the inner layer, and the inner layer is made of an unstretched resin having no orientation so that the tear does not deviate. It is.

  The packaging bag described in Patent Document 6 is made to solve the problem that the tear may easily deviate depending on the opening direction in the packaging bag described in Patent Document 3.

  The packaging bag described in Patent Document 6 is provided with a first score line on one outer layer of the packaging bag and a second score line on the other outer layer, and each score line has one outer edge of the edge bonding portion. The first cut line is the starting point and the other outer edge is the end point. The first cut line converges at the end point of the other straight line part by branching from the straight line part penetrating the left and right side edge parts and the end point of one straight line part. The plurality of score lines are constituted by a score line that swells toward the upper end side and a score line that swells toward the lower end side.

  Both the packaging bag described in Patent Document 5 and the packaging bag described in Patent Document 6 use the start and end points of the cut line on the front and back surfaces as the outer edge of the side edge thermal bonding portion. However, since the cut lines on the front and back surfaces are usually processed separately for the front and back surfaces, it is practically difficult to match the positions of the cut lines on the front and back surfaces exactly.

  If the position of the cut line on the front and back surfaces is shifted even a little, in the laminated body that did not get on the cut at the start of cutting, there is a risk that the cut will run away from the cut line and run in an unintended direction.

Japanese Patent Laid-Open No. 2003-72775 JP 2003-104394 A JP 2005-289396 A JP 2012-12103 A JP 2012-91857 A JP 2012-96839 A

  In recent years, from the viewpoint of universal design, there is a demand for products that can be used by both right-handed and left-handed people, but the packaging bags described in the above-mentioned patent documents are strictly limited. The request was not met.

  The problem to be solved by the present invention is to solve each problem in the packaging bag described in the above-mentioned patent document, to have a stable opening, a clean cut, and the same usability even for people with different left and right hands. The present invention proposes a packaging bag which is obtained and excellent in resealing ability.

  As means for solving the above problems, the invention according to claim 1 is characterized in that the sealant layers of the surface laminate and the back laminate each having a sealant layer are opposed to each other, and the periphery is sealed. A re-sealing means, and an easy-opening means provided between the resealing means and the top seal part, wherein the easy-opening means is provided on the outer edges of the left and right side seal parts. Unsealed portion, surface half-cut line a having a convex shape provided on the surface laminate, surface half-cut line b having a convex shape provided on the surface laminate, and provided on the back laminate The surface half-cut line a and the surface half-cut line b are symmetrically contacted vertically with respect to the back half-cut line so that the convex portion is on the outside. These two are provided as Plane half-cut line are all a starting point to a point on the left side seal portion, a packaging bag, characterized in that the end point of one point on the right side seal portion.

  Since the packaging bag according to the present invention has a linear back half-cut line provided on the back laminate and two vertically symmetrical front half-cut lines provided on the front laminate, the tear when opened is 2 After reaching one of the surface half-cut lines of the book with certainty, it proceeds along one of the surface half-cut lines. Accordingly, unsuccessful opening is unlikely. In addition, regardless of which of the front half-cut lines the tears run, the steps at the cut edges of the laminate on the front and back surfaces are equal.

  Moreover, since the surface half-cut line has no branch, no opening error due to the half-cut line branch occurs.

Further, the invention according to claim 2 is characterized in that the easy-opening processing part is composed of a plurality of horizontal fine fine penetrating scars provided on the outer edges of the left and right side seal parts. 1. The packaging bag according to 1.

  The invention according to claim 3 is the packaging bag according to claim 1 or 2, wherein the surface half-cut line a and the surface half-cut line b are formed of discontinuous half-cut lines. .

  The invention according to claim 4 has a surface opening guide line for guiding a tear to a surface half-cut line above and below the easy-open processing portion. It is a packaging bag as described in.

  In addition, the invention according to claim 5 has a horizontal linear surface opening guide line from the easy-opening processing portion to the start point and the end point, according to any one of claims 1 to 4. It is a packaging bag of description.

  The invention according to claim 6 is characterized in that the surface half-cut line a and the surface half-cut line b form one geometric figure that can be drawn with a single stroke. The packaging bag according to item 1.

  Moreover, invention of Claim 7 has a back surface opening induction | guidance | derivation line | wire which guides a tear to the said back surface half-cut line | wire, It is a packaging bag of any one of Claims 1-6 characterized by the above-mentioned.

  The packaging bag according to the present invention includes, as easy-opening means, an easy-open processing part provided on the outer edges of the left and right side seal parts, a surface half-cut line a having a convex shape provided on the surface laminate, and a surface laminate. A front half-cut line b having a convex shape and a straight back half-cut line provided on the back laminate, and the front half-cut line a and the front half-cut line b are convex. The two surface half-cut lines start from one point on the left side seal part, and are provided so as to be vertically symmetrical and in contact with each other so that the part is on the outside. Since one point on the right side seal part is set as the end point, the tear of the laminate starting from the easy-open processing part provided on the outer edge of the left and right side seal parts is surely in any surface half-cut line of ab Reached and opened Traveling along Fukatto line. For this reason, it is hard to produce the opening mistake by a tearing of a tear, and it can open reliably.

  Moreover, since the packaging bag which concerns on this invention has the linear back surface half-cut line provided in the back surface laminated body, and two surface half-cut lines symmetrically provided in the surface laminated body, the surface half-cut line at the time of opening Regardless of which of the tears runs, the steps of the cut surfaces of the laminate on the front and back surfaces are equal.

  For this reason, even when a right-handed person opens or a left-handed person opens, there is no difference in the opening and reopening properties of the opening, which is excellent from the viewpoint of universal design.

  In addition, since the surface half-cut line has no branch, there is no unsealing error caused by the branch point, such as a tear break from the branch point of the half-cut line.

  In the invention according to claim 2, when the easy-opening processed part is composed of a plurality of horizontal and fine scratch marks, notch chips such as V-shaped or U-shaped notches. Does not occur, and the problem of waste mixing is eliminated. Also, you don't cut your finger at the corner of the notch.

In the invention according to claim 3, when the surface half-cut line a and the surface half-cut line b are discontinuous half-cut lines, the tear resistance at the time of opening increases. If the tear resistance is too small, it may be opened at once when it is opened and the contents may be scattered, but such a problem does not occur.

  In the invention according to claim 4, surface opening guide lines for guiding a tear starting from the easy opening processing part to one of the two surface half-cut lines are provided above and below the easy opening processing part. In the case where it is formed, there is an effect that the tear of the surface laminate starting from the easy-opening processing portion reaches the surface half-cut line more reliably.

  In addition, in the invention according to claim 5, when it has a horizontal linear surface opening guide line from the easy opening processing portion to the start point and end point, the surface laminate similarly starting from the easy opening processing portion This has the effect of more reliably reaching the surface half-cut line.

  Further, in the invention according to claim 6, when the surface half-cut line a and the surface half-cut line b form one geometrical figure that can be drawn with a single stroke, input at the time of setting, particularly in processing by a laser. Is simplified, and the scanning speed during processing is improved.

  Further, in the invention according to claim 7, in the case of having a back opening guide line that guides the tear starting from the easy opening processing portion to the back half cut line, a tear of the laminate starting from the easy opening processing portion Is more reliably guided to the back half-cut line.

FIG. 1 is a schematic plan view showing an embodiment of a packaging bag according to the present invention. FIG. 2 is a schematic plan view of the packaging bag shown in FIG. FIG. 3 is a schematic plan view showing a state where the packaging bag of FIG. 1 is opened. FIG. 4 is a partially enlarged view showing another embodiment of the packaging bag according to the present invention. FIG. 5 is a partially enlarged view showing another embodiment of the packaging bag according to the present invention. FIG. 6 is a partially enlarged view showing another embodiment of the packaging bag according to the present invention. FIG. 7 is a partially enlarged view showing another embodiment of the packaging bag according to the present invention. FIG. 8 is a partially enlarged view showing another embodiment of the packaging bag according to the present invention.

Hereinafter, the packaging bag according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic plan view showing an embodiment of the packaging bag (1) according to the present invention, and FIG. 2 is a schematic plan view showing the packaging bag as viewed from the back side. FIG. 3 is a schematic plan view showing a state where the packaging bag shown in FIG. 1 is opened.

  In the packaging bag (1) according to the present invention, the sealant layers of the surface laminate (2) having the sealant layer and the back laminate (3) having the sealant layer are opposed to each other, and the peripheral edge, that is, the left side seal portion (4 ), The right side seal part (5), the bottom seal part (6), and the top seal part (7). The bottom seal portion (6) is often sealed after filling the contents.

  The packaging bag (1) according to the present invention has a resealing means (13) in the opening, and an easy opening means is provided between the resealing means (13) and the top seal part (7). It is a packaging bag, and the easy-opening means has a convex shape on the easy-open processing part (11) provided on the outer edges of the left and right side seal parts (4, 5) and the surface laminate (2). Surface half-cut line a (8a), surface half-cut line b (8b) having a convex shape provided on the surface laminate (2), and linear back half provided on the back laminate (3) It consists of a cut line (9).

  The front surface half-cut line a (8a) and the front surface half-cut line b (8b) are provided so as to be vertically symmetrical and in contact with each other so that the convex portion is on the outer side. These two surface half-cut lines both start at one point on the left side seal part and end at one point on the right side seal part.

  In the embodiment shown in FIGS. 1 and 2, the surface half-cut line a (8a) and the surface half-cut line b (8b) have a start point (s) at the center of the left side seal part (4) and a right side seal. Part (5) has an end point (e) at the center. Note that the start point and end point are not particularly distinguished, and even if they are reversed, there is no change.

  The positions of the start point (s) and the end point (e) are not particularly limited, and may be between the outer edge and the inner edge of the left and right side seal portions (4, 5).

  Since the packaging bag (1) according to the present invention is provided with the easy opening processing portion (11) on the outer edges of the left and right side seal portions (4, 5) as the easy opening means, it can be opened from either the left or right side. it can. In this example, the easy-open processing part (11) is a V-shaped notch.

  Since the back half-cut line (9) is provided so as to pass through the tip portions of the left and right V-shaped notches, the tear of the back laminate (3) starting from the V-shaped notches is surely back half-cut. Proceed along the line. The tear of the surface laminate (2) proceeds along either the surface half-cut line a (8a) or the surface half-cut line b (8b). In the example shown in FIG. 3, the case where the tear of the surface laminate (2) is opened along the surface half-cut line b (8b) is shown. Note that the positions of the back half-cut line (9) and the V-shaped notch need not exactly match.

  The packaging bag according to the present invention has two surface half-cut lines a (8a) having a convex shape on the surface laminate (2) and a surface half-cut line b (8b) having a convex shape on the bottom. The back half-cut line (9) is provided on the back laminate (3), and the two half-cut lines are centered on the back half-cut line so that the convex portions are on the outside. Since it arrange | positions symmetrically up and down, even if it is a case where the tear of the surface laminated body at the time of opening runs to which half cut line, the level | step difference with a back surface half cut line becomes equal.

  Which of the two surface half-cut lines (8a, 8b) runs depends on the difference between the right-handed hand, whether you pull the top seal part toward you at the start of cutting, or push it to the back, The packaging bag according to the present invention can be used with peace of mind because the steps are the same no matter how they are opened.

FIG. 4 is a partially enlarged view showing another embodiment of the packaging bag (1) according to the present invention.
In the embodiment shown in FIG. 4, the easy-open processing part (11) provided in the outer edge of the left and right side seal parts (4, 5) is composed of a plurality of horizontal, fine, penetrating scars. It is characterized by that.

  Since the packaging bag (1) according to the present invention is provided with easy-opening processing parts (11, 11) on the outer edges of the left and right side seal parts (4, 5) as one of easy opening means, it can be opened from either the left or right side. can do. In the embodiment shown in FIGS. 1-3, a V-shaped notch is used.

  The easy-open processing part (11) may be a notch process such as a general V-shape, U-shape, I-shape, or a plurality of horizontal and fine as shown in FIGS. It may consist of a scar group. Unlike the V-shaped notch and the U-shaped notch, such an easy-opening portion has an advantage that no trouble is caused due to the mixture of missing pieces because no missing pieces are generated. Neither cuts the finger at the corner of the notch.

  However, since the easy-opening processing part which consists of a scar group has a width | variety in an opening start part, the opening guide line for guide | inducing the tear of the produced laminated body to a half cut line may be needed. Also in the embodiment shown in FIG. 4, a back surface opening guide line (10) for guiding the tear to the back surface half-cut line (9) is provided.

  In the left and right side seal portions, the tear proceeds in unison with the front and back, so the tear in the surface laminate (2) is also led to the vicinity of the start point (s) of the surface half-cut line by the back surface opening guide line (10). The tear of the surface laminate guided near the start point proceeds along either the surface half-cut line a (8a) or the surface half-cut line b (8b).

  The position of the start point (s) and end point (e) and the positional relationship of the back surface opening guide line (10) are ideally matched as shown in FIG. 4, but they are not so strict and slightly shifted. There is no problem at all.

FIG. 5 is a partially enlarged view showing another embodiment of the packaging bag (1) according to the present invention.
The surface half-cut line a (8a) and the surface half-cut line b (8b) may be composed of discontinuous half-cut lines as shown in FIG. Since the discontinuous half-cut line has a larger resistance at the time of opening than the continuous half-cut line, it can be used in appropriate combination when the resistance is too small and the usability is poor.

  In the example shown in FIG. 5, the start point (s) and the end point (e) are slightly shifted from the tip position of the back surface opening guide line (10).

FIG. 6 is a partially enlarged view showing another embodiment of the packaging bag (1) according to the present invention.
In the embodiment shown in FIG. 6, surface opening guide lines (12) for guiding the tears to the surface half-cut lines (8 a, 8 b) are provided above and below the easy-open processing portion (11).

  In this example, the tear in the laminate starting from the easy opening portion (11) is guided to the start point (s) or the end point (e) by the surface opening guide line (12), and then the two surface half-cut lines. Proceed to either.

  In this example, the surface opening guide line (12) is a straight line extending from the start point (s) and the end point (e) in the upper and lower directions of the easy-open processing part (11), but does not intersect at the start point and the end point. Two lines may be used.

  In this example, the front surface opening guide wire (12) and the back surface opening guide wire (10) are provided at the same position on the front and back surfaces, but only one of them may be provided.

FIG. 7 is a partially enlarged view showing another embodiment of the packaging bag (1) according to the present invention.
In the embodiment shown in FIG. 7, the start point (s) and the end point (e
) Is provided with a horizontal straight surface opening guide line (12).

  Due to the presence of such a front surface opening guide line (12), the tear on the front side is more reliably guided to the front half cut line as compared with the case of only the back surface opening guide line (10).

  The shape of the surface half-cut line a (8a) and the surface half-cut line b (8b) is preferably a gentle and simple shape. The shape with severe corners and irregularities may cause the tear to be broken.

  In the example shown in FIG. 8, the surface half-cut line a (8a) and the surface half-cut line b (8b) form one horizontally long hexagon. In the example of FIG. 6, the surface half-cut line a (8a) and the surface half-cut line b (8b) form one horizontally long ellipse.

  Thus, when the surface half-cut line a (8a) and the surface half-cut line b (8b) form one geometric figure that can be drawn with a single stroke, the half-cut line is inserted by any method. Even in this case, the design is easy and the cost is advantageous.

  A half-cut line is generally formed by a die cutter or a laser. However, if two surface half-cut lines form one geometric figure, a die cutter is used. If so, the manufacturing cost of the punching die can be reduced, and in the case of a laser, the setting of the laser irradiator becomes easy, and the speed required for scanning is also increased. .

  As the resealing means (13), a synthetic resin fastener in which a belt-like protrusion and a belt-like groove are fitted is most common, but an adhesive seal may be used.

  For the surface laminate (2) and the back laminate (3), a soft packaging film generally used for packaging bags can be used. As a layer structure, a combination of a base material layer / intermediate layer / sealant layer is common.

  Since the substrate layer often involves printing, a biaxially stretched film such as a biaxially stretched polyethylene terephthalate (PET) film, a biaxially stretched polypropylene (PP) film, or a biaxially stretched nylon film is used.

  As the intermediate layer, various barrier films and aluminum foil are used. Examples of the barrier film include a polyvinylidene chloride film, a polyvinyl alcohol film, an ethylene vinyl alcohol copolymer film, a gas barrier nylon film, a gas barrier polyethylene terephthalate (PET) film and the like, a PET film and the like such as aluminum. A metal vapor-deposited film obtained by vapor-depositing a metal, 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 used.

  As the sealant layer, a polyolefin resin is generally used, and specifically, a low density polyethylene resin, a medium density polyethylene resin, a linear low density polyethylene resin, an ethylene-vinyl acetate copolymer, an ethylene-α olefin. Copolymers, ethylene resins such as ethylene-methacrylic acid resin copolymers, blend resins of polyethylene and polybutene, homopolypropylene resins, propylene-ethylene random copolymers, propylene-ethylene block copolymers, propylene- Polypropylene resins such as α-olefin copolymers are used.

Front half-cut line (8a, 8b), back half-cut line (9), and opening guide line (
10 and 12), it is necessary to make a cut while leaving at least the sealant layer, and it is desirable to make a cut only in the base material layer or to keep it in the middle of the intermediate layer.

  As a procedure for producing a packaging bag according to the present invention, first, an intermediate layer, a sealant layer, and the like are bonded to a printed base film, and then a half cut line is formed while aligning with a printed pattern. The half-cut line may be formed before slitting to a predetermined width or after slitting. In addition, when forming a half cut line by a laser, it is also possible to form it at the end when bag making is completed.

  Next, the sealant layers on the front and back surfaces are opposed to each other, and, for example, a fastener tape serving as a resealing means (13) is sandwiched and adhered, and a side seal portion and a top seal portion (7) are formed.

  After the side seal portion is cut and trimmed and divided into individual bags, an easy-open processing portion (11) is formed as necessary. The bottom seal portion (7) is left unsealed and used as a filling opening.

  As the shape of the packaging bag (1), an example of a four-sided bag is shown in the figure. However, the shape is not limited to this, and a three-sided sealing bag or a standing pouch shape to which a bottom tape is added may be used. However, it is necessary to consider in advance how to provide the filling opening for filling the contents.

  As described above, the packaging bag (1) according to the present invention has a stable opening property, a beautiful cut end, the same usability even for people with different left and right hands, and there is no fear of erroneous opening, It is a packaging bag with excellent re-sealing properties, and can therefore be widely used in various applications that require re-sealing.

DESCRIPTION OF SYMBOLS 1 ... Packaging bag 2 ... Front surface laminated body 3 ... Back surface laminated body 4 ... Left side seal part 5 ... Right side seal part 6 ... Bottom seal part 7 ... Top seal part 8a ... Surface half-cut line a
8b ... Surface half-cut line b
9 ... back side half-cut line 10 ... back side opening guide line 11 ... easy opening processing part 12 ... front side opening guide line 13 ... resealing means s ... start point e ... end point

Claims (7)

Each of the surface laminate and the back laminate, each having a sealant layer, has the sealant layers facing each other and sealed at the periphery, and has a resealing means at the opening, between the resealing means and the top seal part. A packaging bag provided with easy-opening means,
The easy-opening means includes an easy-open processing portion provided on the outer edges of the left and right side seal portions, a surface half-cut line a having a convex shape provided on the surface laminate, and a downward convex provided on the surface laminate. It consists of a front half-cut line b having a shape and a straight back half-cut line provided in the back laminate,
The surface half-cut line a and the surface half-cut line b are provided so as to be vertically symmetrical and in contact with each other so that the convex portion is on the outside, and these two surface half-cut lines are in contact with each other. Each of the lines has a point on the left side seal part as a starting point and a point on the right side seal part as an end point.   2. The packaging bag according to claim 1, wherein the easy-opening processing part is composed of a plurality of horizontal, fine, penetrating scars provided on the outer edges of the left and right side seal parts.   The packaging bag according to claim 1, wherein the surface half-cut line a and the surface half-cut line b are discontinuous half-cut lines.   The packaging bag according to any one of claims 1 to 3, further comprising a surface opening guide line that guides a tear to a surface half-cut line above and below the easy-open processing portion.   The packaging bag according to any one of claims 1 to 4, further comprising a horizontal linear surface opening guide line from the easy-opening processing portion to the start point and the end point.   The packaging bag according to any one of claims 1 to 5, wherein the surface half-cut line a and the surface half-cut line b form one geometric figure that can be drawn with a single stroke.   The packaging bag according to any one of claims 1 to 6, further comprising a back surface opening guide line that guides a tear to the back surface half-cut line.