Packaging bag and packaging body

Abstract

A packaging bag (100) is provided with a cutting guide tape (60A) extending in a tape shape along a transverse direction from a side end portion (81) toward another side end portion (82). The cutting guide tape (60A) has, in order from the upper end portion (84) side, a first guide tape having a plurality of first cutting lines inclined at a predetermined angle with respect to the transverse direction and arranged in parallel with each other, a second guide tape having a plurality of second cutting lines in the form of sewing lines inclined at a predetermined angle with respect to the transverse direction in the opposite direction to the first cutting lines and arranged in parallel with each other at a predetermined interval, and a third guide tape having a plurality of third cutting lines inclined at a predetermined angle with respect to the transverse direction in the same direction as the first cutting lines and arranged in parallel with each other. Between the first guide tape and the second guide tape and / or between the second guide tape and the third guide tape, there is provided a fourth cutting line in the form of a sewing line extending along the transverse direction.

Description

Technical Field

[0001] This disclosure relates to packaging bags and packaging bodies. Background Technology

[0002] Packaging bags for sealing and preserving pharmaceuticals, food, and other packaged goods are known. To improve sealing, such bags are formed by laminating the periphery of a pair of laminated films made of multiple layers of different materials. These bags also have stitch-like slits on the front and back to facilitate opening.

[0003] Patent Document 1 proposes a technique in which multiple stitch-like slits formed on the first surface and multiple stitch-like slits formed on the second surface are inclined in opposite directions relative to a predetermined opening direction. By inclining all the stitch-like slits on the front and back sides as described above, and making the inclination of the stitch-like slits opposite on the front and back sides, a pinching portion is formed at the opening after opening, making it easy to pinch with fingers after opening. Patent Document 2 proposes a technique in which a guide slit band is provided between rows of guide slits extending laterally, and the inferior angles of the multiple slits of the guide slit band are different from each other, making opening easier.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent No. 4648605

[0007] Patent Document 2: Japanese Patent Application Publication No. 2019-156491 Summary of the Invention

[0008] The technical problem that the invention aims to solve

[0009] As shown in Patent Documents 1 and 2 above, by providing multiple inclined slit lines, the packaging bag can be opened smoothly and the packaged item can be easily removed. This disclosure provides a packaging bag that further enhances the above advantages and effectively prevents tearing during opening from detaching from the cutting guide and moving in a predetermined direction. Furthermore, a packaging body equipped with the packaging bag described above is provided.

[0010] Technical means for solving technical problems

[0011] This disclosure provides a packaging bag comprising a first laminated film portion on the front side, a second laminated film portion adhered to the back side of the first laminated film portion, and a cutting guide strip extending in a strip-like manner along a transverse direction from one end to the other in each of the front and back sides. The cutting guide strip of the packaging bag comprises, from the upper end side, a first guide strip having a plurality of first slit lines arranged parallel to each other at a predetermined angle relative to the transverse direction; a second guide strip having a plurality of stitch-like second slit lines arranged parallel to each other at predetermined intervals at a predetermined angle relative to the transverse direction in a direction opposite to the first slit lines; and a third guide strip having a plurality of third slit lines arranged parallel to each other at a predetermined angle relative to the transverse direction in the same direction as the first slit lines.

[0012] The aforementioned packaging bag provides a packaging bag having a fourth seam line extending along the transverse direction between the first guide belt and the second guide belt, and / or between the second guide belt and the third guide belt; the first seam line, the second seam line, the third seam line and the fourth seam line are separated from each other; the first seam line, the second seam line and the third seam line on the front side and the first seam line, the second seam line and the third seam line on the back side are respectively inclined in opposite directions relative to the transverse direction.

[0013] The aforementioned packaging bag, from its top end side, sequentially comprises: a first guide strip with a first slit line, a second guide strip with a second slit line, and a third guide strip with a third slit line. The first and third slit lines are inclined in the opposite direction to the second slit line relative to the transverse direction. Therefore, after the tear guided by the second slit line passes through the second guide strip, the direction of the tear changes, thereby preventing the tear from advancing beyond the outer sides of the first and third guide strips. Furthermore, a fourth slit line extending along the transverse direction is provided between the first and second guide strips, and / or between the second and third guide strips. Therefore, it is possible to both prevent the tear from advancing beyond the outer sides of the first and third guide strips and to allow the tear to advance along the fourth slit line.

[0014] Furthermore, the first, second, and third seam lines on the front and the first, second, and third seam lines on the back are inclined in opposite directions relative to the transverse direction, thus allowing the tearing path to differ between the front and back. Therefore, the size of the gripping portion after opening can be stabilized, making it easy to remove the packaged item, and effectively preventing the tear from detaching from the cutting guide and moving in a predetermined direction during opening.

[0015] Furthermore, the fourth slit is a sewn-line type, and the first, second, third, and fourth slits are separate from each other, thus preventing the surface of the first and second laminated portions from breaking. This effectively suppresses deviations in the tearing path. Therefore, it effectively prevents the tear from detaching from the cutting guide and moving in a predetermined direction during opening. Moreover, compared to a straight slit rather than a sewn-line type, it further reduces the likelihood of the torn opening becoming sharp, thereby improving security.

[0016] Preferably, the arrangement of the fourth seam line differs on the front and back sides of the packaging bag. Specifically, on the front side, the fourth seam line is located between the second and third guide strips, and when viewed horizontally, both the second and third seam lines slope towards the fourth seam line; on the back side, the fourth seam line is located between the first and second guide strips, and when viewed horizontally, both the first and second seam lines slope towards the fourth seam line. This makes it easier to create different tearing paths on the front and back sides, allowing for a more reliable gripping mechanism after opening. Furthermore, it reduces the number of fourth seam lines while maintaining the strength of the first and second laminated film portions.

[0017] Preferably, on the front of the packaging bag, an imaginary line parallel to the transverse direction and passing through the lower ends of multiple first slit lines intersects with at least a portion of the stitch-like second slit line; on the back of the packaging bag, an imaginary line parallel to the transverse direction and passing through the upper ends of multiple third slit lines intersects with at least a portion of the stitch-like second slit line. Therefore, even if tearing begins from a side end opposite to the predetermined side end, the tear can still proceed near the imaginary line on both the front and back sides. Thus, even if tearing begins from a side end different from the predetermined side end, it is possible to sufficiently prevent the tear from detaching from the cutting guide and proceeding in a direction outside the predetermined direction during opening.

[0018] Preferably, the second seam line on the front and the second seam line on the back of the packaging bag are staggered in the vertical direction. This results in a greater stagger between the tear paths on the front and back, allowing the pinchable portion after opening to be sufficiently large.

[0019] Preferably, the width of the cutting guide strip is 4 mm or more. When a notch is provided at the side end after the cutting guide strip is in place, making the width of the cutting guide strip sufficiently large can suppress the notch from deviating from its placement. This further suppresses tearing from the notch onto the cutting guide strip.

[0020] Preferably, the cutting guide strip extends from one end of the packaging bag to the other end, and the second guide strip has a notch at the side end. This allows the tear to proceed from the second guide strip with greater reliability. Therefore, both a stable gripping portion can be formed, and deviation of the tear from the cutting guide strip can be sufficiently suppressed.

[0021] Preferably, the packaging bag includes: a receiving section for receiving the packaged item; and a sealing section disposed between the receiving section and the cutting guide strip, configured such that the receiving section can be closed after being opened along the cutting guide strip. This allows for repeated opening and closing of the receiving section, effectively suppressing changes in the properties of packaged items that are not used up in one go.

[0022] Preferably, the first and second laminated portions have a laminated structure in which a sealant layer, an inorganic barrier layer, a polyethylene resin layer, and a substrate layer are sequentially laminated from the inside. By having a polyethylene resin layer between the barrier layer and the substrate layer, the first and second laminated portions can be made flexible, possessing sufficient strength while effectively preventing tearing in a predetermined direction.

[0023] Preferably, the tear strength when each of the first and second laminated portions is torn along the cutting guide strip is 0.1 N to 2.0 N, more preferably 0.2 N to 0.9 N. Thus, the cutting guide strip can maintain sufficient strength while being torn with a moderate force. The tear strength disclosed herein is a value measured in accordance with JIS K 7128-1:1998.

[0024] This disclosure provides a packaging body comprising any of the aforementioned packaging bags and an adhesive contained in a receiving portion of the packaging bag. Because the packaging body comprises any of the aforementioned packaging bags, it can effectively prevent tearing during opening from detaching from the cutting guide and moving in a predetermined direction. Therefore, the adhesive can be smoothly removed. Furthermore, it can prevent damage to the packaging bag accompanying opening, so it can be resealed and stored after opening. Therefore, the adhesive's effectiveness can be maintained at a high level for a long time after opening.

[0025] Invention Effects

[0026] According to this disclosure, it is possible to provide a packaging bag that can sufficiently prevent tearing during opening from detaching from the cutting guide and moving in a predetermined direction. Furthermore, it is possible to provide a packaging body having such a packaging bag. Attached Figure Description

[0027] Figure 1 This is a top view showing the front side of a packaging bag and packaging body according to one embodiment.

[0028] Figure 2 This is a top view showing the back side of a packaging bag and packaging body according to one embodiment.

[0029] Figure 3 This is a partial top view enlarged to show the cut guide strip on the front of the packaging bag and packaging body according to one embodiment.

[0030] Figure 4 It means Figure 3 A diagram showing the areas where the guide bands have been cut.

[0031] Figure 5 This is a partial top view showing the cut guide strip on the back of the packaging bag and packaging body according to one embodiment, enlarged.

[0032] Figure 6 This is a diagram showing the packaging bag and packaging body of one embodiment after being cut off and unfolded.

[0033] Figure 7 This diagram shows the state when the packaging bag and packaging body of one embodiment are torn open from one end along the cutting guide strip.

[0034] Figure 8 This is a diagram showing the unfolded packaging bag and packaging body after one side of the packaging body has been cut off, according to one embodiment.

[0035] Figure 9 It is to stack the film on the front side along Figure 3 A cross-sectional view taken when the IX-IX line is cut.

[0036] Figure 10 This is a top view showing the front side of the packaging bag and packaging body in other embodiments.

[0037] Figure 11 This is a diagram showing the unfolded packaging bag and packaging body after the other end of the packaging bag and packaging body in other embodiments have been cut off.

[0038] Figure 12 This is a diagram used to illustrate the method for determining tear strength.

[0039] Figure 13 This is a diagram used to illustrate the method for determining tear strength.

[0040] Figure 14 This is a top view showing a packaging body and an adhesive contained in the packaging body according to one embodiment. Detailed Implementation

[0041] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings, as appropriate. However, the following embodiments are merely illustrative examples of the present disclosure and are not intended to limit the present disclosure to the following content. In the description, the same symbols are used for the same elements or elements having the same function, and repeated descriptions are omitted. Furthermore, regarding the positional relationships such as up, down, left, and right used in the description, unless otherwise specified, they are based on the positional relationships shown in the accompanying drawings.

[0042] Figure 1 This is a top view of the front 100A side of a packaging bag 100 according to one embodiment. Figure 2 This is a top view showing the back side 100B of the packaging bag 100. The laminated film portion 91 (first laminated film portion) on the front side and the laminated film portion 92 (second laminated film portion) on the back side are each composed of laminated film. The packaging bag 100 includes: a sealing portion 87 formed by bonding the peripheries of the generally rectangular laminated film portions 91 and 92 together, and a receiving portion 88 formed inside the sealing portion 87 between the laminated film portions 91 and 92. That is, the sealing portion 87 bonds the laminated film portions 91 and 92 together at the upper end 84, side ends 81 and 82, and lower end 85 of the packaging bag 100. The receiving portion 88 contains packaged items such as adhesives, pharmaceuticals, and food.

[0043] The packaging bag 100 has a cutting guide strip 60A and a cutting guide strip 60B on the upper part of the front 100A and back 100B, respectively, which are arranged to be torn open by the packaging bag 100. The cutting guide strips 60A and 60B extend from one end 81 to the other end 82. V-shaped notches 61 and 62 are formed at the side ends 81 and 82 to initiate tearing. The notches 61 and 62 are formed on the inside of the cutting guide strips 60A and 60B.

[0044] When tearing begins from notch 61, the tear is made in a transverse direction from one end 81 toward the other end 82. Figure 1 and Figure 2 The upper end 84 is torn off from the packaging bag 100 as the tear proceeds in the x-direction. The cutting guide strips 60A and 60B of the packaging bag 100 have notches 62 at their other ends 82, thus allowing the tear to proceed in the opposite direction to the transverse direction and detach the upper end 84 from the packaging bag 100. Furthermore, since the tearing proceeds more smoothly in the transverse direction (x-direction), at least one of the cutting guide strips 60A and 60B may have a marking indicating the transverse direction as the cutting direction.

[0045] Below the cutting guide strips 60A and 60B, there is a sealing portion 70 that re-closes the receiving portion 88 after it has been opened by the cutting guide strips 60A and 60B. The sealing portion 70 can be adapted to a known structure that allows for repeated opening and sealing. For example, it can be a fastener made of synthetic resin that allows for repeated sealing by interlocking the strip-shaped protrusions and the strip-shaped grooves, or it can be an adhesive seal.

[0046] Figure 3 This is a magnified top view showing a portion of the cut guide tape 60A on the front 100A of the packaging bag 100. Figure 4 This diagram shows the regions of each guide band of the cutting guide band 60A. The cutting guide band 60A has, sequentially from the upper end 84 side, a first guide band 10A, a second guide band 20A, a fourth guide band 40A, and a third guide band 30A. The first guide band 10A has multiple first cutting lines 12 arranged parallel to each other, inclined at a predetermined angle θ1 relative to the transverse direction (x-direction). The angle θ1 can be from 20° to 50°, or from 30° to 40°. This allows for smooth guidance into the center of the first guide band 10A, towards the tear.

[0047] The first slit line 12, also known as a half-cut line or weakening line, is formed by adding a slit on the front side of the laminated film portions 91 and 92 using a metal tool or laser. The second slit line 22, the third slit line 32, and the fourth slit line 42, described below, are formed similarly. The first guide band 10A consists of a pair of imaginary lines VL11 and VL12 (which pass through the upper and lower ends of the first slit line 12 and extend parallel to each other in the transverse direction (x direction)). Figure 4 The strip-shaped area is defined by the first guide strip 10A. The width (length in the y direction) of the first guide strip 10A can be 0.2mm to 3mm, 0.4mm to 2mm, or 0.6mm to 1mm.

[0048] The length L1 of the first slit line 12 can be 0.3 mm to 4 mm, 0.5 mm to 3 mm, or 1 mm to 2 mm. A first slit line 12 with such a length L1 can maintain sufficient strength of the packaging bag 100 while also allowing for precise changes in the tearing path. The spacing between adjacent first slit lines 12 is different. That is, the spacing D1 between adjacent first slit lines 12 that are close to each other is smaller than the spacing S1 between adjacent first slit lines 12 that are far apart. The ratio of spacing S1 to spacing D1 can be 1.5 to 3, or 1.8 to 2.5. By varying the spacing of the first slit lines 12 in the first guide belt 10A as described above, it is possible to prevent easy penetration of the tear into the first guide belt 10A, and even if the tear penetrates the first guide belt 10A, it is possible to prevent the tear from continuing along the first guide belt 10A. However, in a modified example, the first slit lines 12 can also be arranged at equal intervals.

[0049] The second guide belt 20A has multiple second slit lines 22 that are inclined at a predetermined angle θ2 relative to the transverse direction (x-direction) and opposite to the first slit line 12, and are arranged parallel to each other at equal intervals. The angle θ2 of the second slit lines 22 inclined relative to the transverse direction (x-direction) can be from 25° to 55°, or from 30° to 50°. This allows the tearing direction of the second guide belt 20A to be smoothly guided along the transverse direction.

[0050] The second seam line 22 is a straight stitch line, consisting of alternating threaded portions 22a and non-threaded portions 22b shorter than the threaded portions 22a. The stitch line shape of the second seam line 22 allows for smooth tearing and also prevents surface tearing of the laminated film portion 91. From the same perspective, the length L2 of the threaded portion 22a of the stitch line-shaped second seam line 22 can be 0.3 mm to 3 mm, or 0.5 mm to 2 mm. Furthermore, the interval D2 of the threaded portions 22a (the length of the non-threaded portions 22b) can be 0.1 mm to 1.2 mm, or 0.3 mm to 1.0 mm. The interval S2 of adjacent stitch line-shaped second seam lines 22 can be 0.1 mm to 1.2 mm, or 0.3 mm to 1.0 mm. The length of a single stitch line-shaped second seam line 22 can be 4 mm to 10 mm, or 5 mm to 9 mm. In a variation, the spacing between adjacent second seam lines 22 can be different rather than fixed.

[0051] The second slit line 22 is positioned at the center of the cutting guide strip 60A and serves to guide the tearing of the second guide strip 20A to the fourth slit line 42 described later. Therefore, its number is preferably greater than that of the first slit line 12 and the third slit line 32. The number of the sewing-line-like second slit line 22 can be more than 1.5 times the number of the first slit line 12 and the third slit line 32.

[0052] Alternatively, the threaded portions 22a of adjacent second slit lines 22 can be arranged at certain intervals along the vertical direction (y-direction). In this case, it is preferable that five or more threaded portions 22a are arranged along the vertical direction (y-direction). Thus, even if the width of the second guide strip 20A is increased, it can still smoothly guide the tearing. By simply increasing the width of the second guide strip 20A, it is easy to form notches 61 and 62 in a manner that falls within the second guide strip 20A.

[0053] The second guide band 20A is a pair of imaginary lines VL21 and VL22 that pass through the upper and lower ends of the second slit line 22 and extend parallel to each other in the transverse direction (x direction). Figure 4 The strip-shaped area demarcated. Additionally, such as... Figure 3 and Figure 4 As shown, when the upper ends of each of the second slit lines 22 are at different positions, the imaginary line VL21 is drawn so as to pass through the upper end of the uppermost second slit line 22. Similarly, when the lower ends of each of the second slit lines 22 are at different positions, the imaginary line VL22 is drawn so as to pass through the lower end of the lowermost second slit line 22. The width (length in the y-direction) of the second guide band 20A can be 2mm to 8mm, 3mm to 7mm, or 4mm to 6mm. Adjacent first guide bands 10A and second guide bands 20A can also be directly connected. That is, the imaginary line VL12 passing through the lower end of the first slit line 12 can also pass through at least a portion of the upper end of the second slit line 22. In this case, as... Figure 4 As shown, imaginary lines VL12 and VL21 are drawn in the same position. Imaginary lines VL12 and VL21 can also be separated from each other, and a portion of the first guide band 10A and a portion of the second guide band 20A can overlap. In this case, the imaginary line VL12 passing through the lower end of the first slit line 12 can also intersect at least a portion of the second slit line 22.

[0054] The third guide band 30A has multiple third slit lines 32 arranged parallel to each other, inclined at a predetermined angle θ3 relative to the transverse direction (x-direction) and in the same direction as the first slit line 12. The arrangement, shape, size, and spacing of the third slit lines 32 can be the same as or different from the first slit line 12. The angle θ3 of the third slit lines 32 inclined relative to the transverse direction (x-direction) can be 20° to 50° or 30° to 40°. This allows for smooth guidance into the central portion of the tear-to-cut guide band 60A of the third guide band 30A. The angle θ3 can be equal to or different from the angle θ1.

[0055] The third guide band 30A is a strip-shaped area defined by a pair of imaginary lines VL31 and VL32 that pass through the upper and lower ends of the third slit line 32 and extend parallel to each other in the transverse direction (x direction). The width (length in the y direction) of the third guide band 30A can be 0.2 mm to 3 mm, 0.4 mm to 2 mm, or 0.6 mm to 1 mm.

[0056] The length L3 of the third seam line 32 can be from 0.3 mm to 4 mm, from 0.5 mm to 3 mm, or from 1 mm to 2 mm. A third seam line 32 with such a length L3 can maintain the strength of the packaging bag 100 sufficiently and can also change the tearing path with high precision. The spacing between adjacent third seam lines 32 is different. That is, the spacing D3 of adjacent third seam lines 32 that are close to each other is smaller than the spacing S3 of adjacent third seam lines 32 that are far apart. The ratio of spacing S3 to spacing D3 can be from 1.5 to 3, or from 1.8 to 2.5. By varying the spacing of the third seam lines 32 in the third guide strip 30A, it is possible to prevent the tear from easily penetrating the third guide strip 30A, and even if the tear penetrates the third guide strip 30A, it is possible to prevent the tear from continuing along the third guide strip 30A. However, in a modified example, the third seam lines 32 can also be arranged at equal intervals.

[0057] The cutting guide 60A has a fourth guide 40A between the second guide 20A and the third guide 30A, which includes a fourth cutting line 42 extending in the transverse direction (x direction). The fourth guide 40A is the area between the second guide 20A and the third guide 30A, and is a strip-shaped area defined by an imaginary line VL22 that passes through the lower end of the second cutting line 22 and extends parallel in the transverse direction (x direction), and an imaginary line VL31 that passes through the upper end of the third cutting line 32 and extends parallel in the transverse direction (x direction). The fourth cutting line 42 extends in the transverse direction (x direction), thus preventing tearing from detaching from the cutting guide 60A and moving in a predetermined direction. The fourth cutting line 42 is a straight stitch line, which is formed by alternating threaded portions 42a and non-threaded portions 42b having a length shorter than the threaded portions 42a.

[0058] The fourth slit line 42 is a stitched line, which allows for smooth tearing and prevents the surface of the laminated film portion 91 from breaking. Furthermore, it prevents the tear from becoming sharp, thus improving safety. From the same perspective, the length L4 of the threaded portion 42a of the stitched fourth slit line 42 can be 1 mm to 5 mm, or 1.5 mm to 4 mm. The length D4 of the non-threaded portion 42b can be 0.1 mm to 1.2 mm, or 0.3 mm to 1.0 mm. The stitched fourth slit line 42 can extend from one end 81 to the other end 82, traversing the front surface 100A.

[0059] The fourth slit line 42 is located between the second guide band 20A and the third guide band 30A, but it is separated from the second slit line 22 and the third slit line 32. That is, the first slit line 12, the stitch-like second slit line 22, the third slit line 32, and the stitch-like fourth slit line 42 are separated from each other. This can suppress the surface layer breakage of the laminated film portion 91. Specifically, the fourth slit line 42 is the longest stitch-like slit line among the first slit line 12, the second slit line 22, the third slit line 32, and the fourth slit line 42. Therefore, the surface layer is prone to breakage in the area adjacent to the fourth slit line 42. From the viewpoint of sufficiently suppressing the aforementioned damage, the spacing between the fourth slit line 42 and the second slit line 22 and the third slit line 32 is preferably 0.3 mm or more on both sides, more preferably 0.4 mm or more. From the viewpoint of maintaining sufficiently good tearability when tearing, these spacings can be 2 mm or less, or 1 mm or less. These spacings are determined as the shortest distance between the lower end of the second slit line 22 (the lower end of the lowermost threaded portion 22a) and the threaded portion 42a of the fourth slit line 42, and the shortest distance between the upper end of the third slit line 32 and the threaded portion 42a of the fourth slit line 42, respectively.

[0060] The fourth slit line 42, which is a stitch line in shape on the front side 100A, is preferably one. This can maintain the strength of the cutting guide strip 60A and prevent the surface layer of the laminated film portion 91 from breaking.

[0061] When viewed along the transverse direction (x direction), both the second and third slit lines 22 and 32, which are stitch-like, on the front side 100A, are inclined toward the fourth slit line 42. Therefore, the second and third slit lines 22 and 32 function to converge the tearing action advancing along the transverse direction toward the fourth slit line 42. On the other hand, when viewed along the transverse direction (x direction), the first slit line 12 is inclined away from the fourth slit line 42. When the tearing action advances in the direction opposite to the transverse direction (x direction), the first slit line 12 functions to prevent the tearing action from detaching from the cutting guide strip 60A to the upper end 84 side. At this time, the tearing action can advance near the boundary between the first guide strip 10A and the second guide strip 20A.

[0062] Figure 5 This is a partial top view showing an enlarged view of the cutting guide strip 60B in the back side 100B of the packaging bag 100. The cutting guide strip 60B has, from the upper end 84 side, a first guide strip 10B, a fourth guide strip 40B, a second guide strip 20B, and a third guide strip 30B in sequence. The cutting guide strip 60B differs from the cutting guide strip 60A in the front side 100A in that there is no fourth guide strip 40B between the second guide strip 20B and the third guide strip 30B, but there is a fourth guide strip 40B between the first guide strip 10B and the second guide strip 20B. That is, the vertical positional relationship of the second guide strips 20A, 20B and the fourth guide strips 40A, 40B in the packaging bag 100 is reversed in the front side 100A and the back side 100B. The other configurations of the cutting guide strip 60B can be the same as those of the cutting guide strip 60A. That is, the first guide band 10B may contain the same first cut line 12 as the first guide band 10A. The second guide band 20B may contain the same stitch-like second cut line 22 as the second guide band 20A. The third guide band 30B may contain the same third cut line 32 as the third guide band 30A.

[0063] The fourth guide band 40B may contain a fourth cut line 42 in the same stitch-like shape as the fourth guide band 40A. The cutting guide band 60B has a fourth cut line 42 in the transverse direction (x-direction) between the first guide band 10B and the second guide band 20B. Because the fourth cut line 42 extends in the transverse direction (x-direction), it can prevent tearing from detaching from the cutting guide band 60B and moving in a predetermined direction. The fourth cut line 42 is a straight stitch-like shape, consisting of alternating threaded portions 42a and non-threaded portions 42b having a shorter length than the threaded portions 42a.

[0064] The first slit line 12 of the back side 100B and the first slit line 12 of the front side 100A are inclined in opposite directions relative to the transverse direction (x direction). That is, as the movement proceeds along the transverse direction (x direction), the first slit line 12 of the back side 100B moves further downward, while the first slit line 12 of the front side 100A moves further upward. In this disclosure, "inclined in opposite directions relative to the transverse direction" means, as described above, that as the movement proceeds along the transverse direction (x direction), the directions in which the two slit lines move are opposite to each other, one vertically and the other vertically. On the other hand, "inclined in the same direction relative to the transverse direction" means that as the movement proceeds along the transverse direction (x direction), the directions in which both slit lines move further upward or further downward.

[0065] Similar to the first slit line 12, the second slit line 22 of the back side 100B and the second slit line 22 of the front side 100A are inclined in opposite directions relative to the transverse direction (x direction). The third slit line 32 of the back side 100B and the third slit line 32 of the front side 100A are inclined in opposite directions relative to the transverse direction (x direction). As described above, each slit line is inclined in opposite directions relative to the transverse direction (x direction), thus forming a pinching portion when the packaging bag is torn along the transverse direction.

[0066] When viewed from above, the cutting guide strips 60A and 60B on the front 100A and back 100B, respectively, are arranged in an overlapping manner. However, when viewed from above, the fourth cut line 42 of the front 100A and the fourth cut line 42 of the back 100B are arranged in an unoverlapping manner. Therefore, when the packaging bag is torn open, the tearing paths of the front 100A and the back 100B can be made different with greater reliability. Thus, the gripping portion can be stably formed.

[0067] Cut the width of guide strips 60A and 60B ( Figure 3 , Figure 5 The length (in the y-direction) is preferably 4 mm or more, more preferably 6 mm or more, and even more preferably 7 mm or more. Therefore, when the cutting guide strips 60A and 60B are set and then the notches 61 and 62 are provided at the side ends 81 and 82, it is possible to prevent the notches 61 and 62 from deviating from the cutting guide strips 60A and 60B. The upper limit of the width of the cutting guide strips 60A and 60B can be, for example, 20 mm.

[0068] When viewed from above, the second slit line 22 of the front 100A and the second slit line 22 of the back 100B are staggered vertically. That is, the second guide strip 20A of the front 100A and the second guide strip 20B of the back 100B are staggered vertically. This results in a greater offset between the tear paths of the front 100A and the back 100B, allowing for a sufficiently large gripping portion after opening. When viewed from above, the fourth guide strip 40A of the front 100A (the area between the second guide strip 20A and the third guide strip 30A) overlaps at least partially with the second guide strip 20B of the back 100B. This allows for smoother tearing along the fourth guide strip 40A. Similarly, when viewed from above, the fourth guide strip 40B (the area between the first guide strip 10B and the second guide strip 20B) on the back side 100B overlaps with at least a portion of the second guide strip 20A on the front side 100A. This allows for smoother tearing in the fourth guide strip 40B.

[0069] Figure 6 This diagram is meant to schematically represent the unfolding of the packaging bag 100 as it is torn open from one end 81 with the notch 61 as the starting point, along the cutting lines C1 and C2. Figure 6 This is a diagram showing the packaging bag 100 unfolded after the other end 82 has been cut off. The cutting guides 60A and 60B include a notch 61 at one end 81. When tearing begins from the notch 61, the tearing tip, in both the front and back sides 100B, first advances along the transverse direction (x1 and x2 directions) and reaches the second cut line 22. Then, guided by the second cut line 22, the tearing tip turns downwards in the front side 100A, reaching the fourth cut line 42. It then advances along the stitch-like fourth cut line 42, forming a cutting line C1. On the other hand, in the back side 100B, the tearing tip turns upwards, reaching the fourth cut line 42. It then advances along the stitch-like fourth cut line 42, forming a cutting line C2. Cutting lines C1 and C2 are not linearly symmetrical when viewed with the side end 81 as an axis, thus creating a pinching portion.

[0070] Figure 7 This diagram shows the state when the packaging bag 100 is torn open from one end 81 along the cutting guide strips 60A and 60B. By tearing along the cutting guide strips 60A and 60B, a pinching portion 75 is formed in the packaging bag 100. By simply pinching the pinching portion 75 with your fingers, the packaged item contained in the receiving section of the packaging bag 100 can be easily removed. Furthermore, in Figure 7 The image shows the packaging bag 100 halfway through opening, but it is also possible to continue tearing and detach the upper end 84 of the packaging bag 100 from it. The packaging bag 100 is as follows... Figure 1, Figure 2 The packaged item has a sealing section 70, which allows it to be sealed and stored again.

[0071] The packaging bag 100 (packaging body 200) is preferably opened by tearing from one end 81, but it can also be opened by tearing from the other end 82.

[0072] Figure 8 This diagram is meant to schematically illustrate the unfolding of the packaging bag 100 as it is torn open from the other end 82 with the notch 62 along the cutting lines C3 and C4. Figure 8 This is a diagram showing the packaging bag 100 unfolded after one end 81 has been cut off. The cutting guides 60A and 60B include a notch 62 at the other end 82. When tearing starting from the notch 62, on the front side 100A and back side 100B, the torn tip first advances in the opposite direction to the transverse direction (x1, x2) and reaches the second cut line 22. Then, guided by the second cut line 22, the torn tip turns upward in the front side 100A, reaching the first cut line 12. Then, guided by the first cut line 12, it turns downward, reaching other second cut lines 22. Then, it advances near the boundary between the first guide strip 10A and the second guide strip 20A, forming a cutting line C3. On the other hand, on the back side 100B, the torn tip turns downward, reaching the third cut line 32. Guided by the third cut line 32, it turns upward, reaching other second cut lines 22. Then, it advances near the boundary between the second guide band 20B and the third guide band 30B, forming a cutting line C4. Cutting lines C3 and C4 are not linearly symmetrical when viewed with the outer edge of the other end 82 as the axis, thus forming a pinching portion.

[0073] As described above, regardless of whether the packaging bag 100 is torn from either side end 81 or 82, the tear during opening can be effectively prevented from detaching from the cutting guide strips 60A and 60B and moving in a predetermined direction. Furthermore, a stable gripping portion can be formed, thus allowing for smooth removal of the packaged item.

[0074] Figure 9 The laminated film portion 91 on the front 100A side of the packaging bag 100 is formed along... Figure 3 The cross-sectional view taken along line IX-IX. The laminated film portion 91 has a laminated structure in which an adhesive layer 72, an inorganic barrier layer 74, a polyethylene resin layer 76, and a substrate layer 78 are sequentially laminated from the inside. By having a polyethylene resin layer 76 between the barrier layer 74 and the substrate layer 78, the laminated film portion 91 has flexibility, which can suppress unexpected tearing during transportation, etc.

[0075] Regarding the sealing layer 72, examples include film-like polyolefin resins. More specifically, examples include low-density polyethylene resin, medium-density polyethylene resin, linear low-density polyethylene resin, heat-sealable polyethylene terephthalate resin, ethylene-vinyl acetate copolymer, ethylene-α-olefin copolymer, ethylene-methacrylic acid copolymer, and other ethylene-based resins; blended resins of polyethylene and polybutene; homopolypropylene resin, propylene-ethylene random copolymer, propylene-ethylene block copolymer, propylene-α-olefin copolymer, and other polypropylene-based resins. The thickness of the sealing layer 72 can be from 10 μm to 100 μm.

[0076] The inorganic barrier layer 74 can include, for example, an inorganic vapor-deposited film, a metal foil, a resin film, or a layer formed by laminating a vapor-deposited layer onto a resin film. Specifically, examples include inorganic vapor-deposited films such as silicon dioxide, aluminum vapor-deposited films, aluminum foil, and aluminum foil laminated with PET film. One or more of the above can be used alone or in combination. The thickness of the barrier layer 74 can be from 5 μm to 30 μm.

[0077] Regarding the polyethylene resin layer 76, a biaxially oriented polyethylene film can be cited as an example. The thickness of the polyethylene resin layer 76 can be from 10 μm to 40 μm.

[0078] Examples of substrate layer 78 include paper, biaxially oriented polyethylene terephthalate (PET) film, biaxially oriented polypropylene (PP) film, and biaxially oriented nylon film. Substrate layer 78 can be formed using one or more of the above-mentioned materials alone or in combination. The thickness of substrate layer 78 can be from 10 μm to 30 μm.

[0079] like Figure 9 As shown, the second slit line 22 of the second guide strip 20A is formed by adding a cut to the substrate layer 78. The first slit line 12, the third slit line 32, and the fourth slit line 42 can also be formed in the same way. The laminated film portion 92 (laminated film 92) on the back side can also have the same laminated structure as the laminated film portion 91 (laminated film 91) on the front side. An adhesive layer can also be formed between the layers.

[0080] Figure 10 This is a top view of the front 110A side of the packaging bag 110 (packaging body 210) in other embodiments. Figure 11 It is Figure 10 The diagram shows the packaging bag 110 unfolded after the other end 82 is cut off. In this embodiment, on the upper part of the front side 110A and the back side 110B of the packaging bag 110, there are cutting guide strips 65A and 65B, respectively, which are used to tear open the packaging bag 110 for sealing, and are provided across the space between one end 81 and the other end 82. As will be described below, the cutting guide strips 65A and 65B have a different structure than the cutting guide strips 60A and 60B of the packaging bag 100 in the above embodiment. The structure of the packaging bag 110, except for the cutting guide strips 65A and 65B, can be the same as that of the packaging bag 100.

[0081] like Figure 10 As shown, the cutting guide strip 65A (cutting guide strip 65B) extends from one end 81 to the other end 82. A U-shaped notch 64 is formed at the side end 81 to initiate tearing. A similar notch is formed at the other end 82. The notch 64 can fall within the second guide strips 20A, 20B of the cutting guide strips 65A, 65B.

[0082] like Figure 11 As shown, the cutting guide strip 65A has a first guide strip 10A, a fourth guide strip 40A, a second guide strip 20A, a fifth guide strip 41A, and a third guide strip 30A from the upper end 84 side. The first guide strip 10A, the fourth guide strip 40A, the second guide strip 20A, and the third guide strip 30A each have a first cut line 12, a fourth cut line 42, a second cut line 22, and a third cut line 32, which are the same as those on the packaging bag 100. The fourth guide strip 40A is the area between the first guide strip 10A and the second guide strip 20A, and is a strip-shaped area defined by an imaginary line VL12 that passes through the lower end of the first cut line 12 and extends parallel to the transverse direction (x direction), and an imaginary line VL21 that passes through the upper end of the second cut line 22 and extends parallel to the transverse direction (x direction). The fifth guide band 41A has the same fourth slit line 42 as the fourth guide band 40A. The fifth guide band 41A is the area between the second guide band 20A and the third guide band 30A, and is a band-shaped area defined by an imaginary line VL22 that passes through the lower end of the second slit line 22 and extends parallel to the transverse direction (x direction), and an imaginary line VL31 that passes through the upper end of the third slit line 32 and extends parallel to the transverse direction (x direction).

[0083] Similar to the cutting guide strip 65A, the cutting guide strip 65B has a first guide strip 10B, a fourth guide strip 40B, a second guide strip 20B, a fifth guide strip 41B, and a third guide strip 30B, starting from the upper end 84 side. The first guide strip 10B, the fourth guide strip 40B, the second guide strip 20B, and the third guide strip 30B each have the same first cut line 12, fourth cut line 42, second cut line 22, and third cut line 32 as the packaging bag 100. The fourth guide strip 40B is the area between the first guide strip 10B and the second guide strip 20B, defined by an imaginary line VL12 extending parallel to the transverse direction (x-direction) through the lower end of the first cut line 12, and an imaginary line VL21 extending parallel to the transverse direction (x-direction) through the upper end of the second cut line 22. The fifth guide band 41B has the same fourth slit line 42 as the fourth guide band 40B. The fifth guide band 41B is the area between the second guide band 20B and the third guide band 30B, and is a band-shaped area defined by an imaginary line VL22 that passes through the lower end of the second slit line 22 and extends parallel to the transverse direction (x direction), and an imaginary line VL31 that passes through the upper end of the third slit line 32 and extends parallel to the transverse direction (x direction).

[0084] Packaging bag 110 Figure 11 As shown, when viewed with the side end 81 as the axis, the positional relationship of the first guide belt, the second guide belt, the third guide belt, the fourth guide belt, and the fifth guide belt is linearly symmetrical. That is, the arrangement order of the first guide belt, the second guide belt, the third guide belt, the fourth guide belt, and the fifth guide belt is the same on the front side 110A and the back side 110B.

[0085] like Figure 11 As shown, when tearing begins from the notch 64, the torn tip first advances along the transverse direction (x1 and x2 directions) and reaches the second slit line 22. Then, guided by the second slit line 22, the torn tip turns downward in the front side 110A and reaches the fourth slit line 42 of the fifth guide band 41A. Then, it advances along the fourth slit line 42 to form a cutting line C5. On the other hand, on the back side 110B, the torn tip turns upward and reaches the fourth slit line 42 of the fourth guide band 40B. Then, it advances along the fourth slit line 42 to form a cutting line C6. Cutting lines C5 and C6 are not linearly symmetrical when viewed with the outer edge of the side end 81 as the axis, thus forming a pinching portion.

[0086] When from Figure 10When the notch 66 at the other end 82 shown begins to tear, on the front side 110A, the torn tip is guided upward by the second slit line 22, reaching the fourth slit line 42 of the fourth guide band 40A. It then advances along the fourth slit line 42, forming a cut line. On the other hand, on the back side 110B, the torn tip is guided downward by the second slit line 22, reaching the fourth slit line 42 of the fifth guide band 41B. It then advances along the fourth slit line 42, forming a cut line. The two cut lines formed as described above are not linearly symmetrical when viewed with the side end 81 as the axis, thus creating a pinching portion.

[0087] In the packaging bag 110, regardless of which side end is cut from, the tear can be guided to the fourth cut line 42 from both the front 100A and the back 100B. Therefore, the tear during opening can be effectively prevented from detaching from the cutting guides 65A and 65B and moving in a predetermined direction.

[0088] The tear strength when the laminated film portions 91 and 92 constituting the packaging bags 100 and 110 are torn along the cutting guide strips 60A and 60B (65A and 65B) is preferably 0.1N to 2.0N, more preferably 0.2N to 0.9N. The packaging bag 100 (110) and the packaging body 200 (210) formed by bonding the laminated film portions 91 and 92 with the cutting guide strips 60A and 60B (65A and 65B) having the above-mentioned tear strength can be opened smoothly by pinching with fingers.

[0089] The tear strength of this disclosure was determined in accordance with JIS K 7128-1:1998. Figure 12 and Figure 13 This is a diagram illustrating a method for determining tear strength. The laminated film portion 91 (laminated film 91) having a cutting guide band 60A (65A) is processed into... Figure 12 The rectangular test piece shown (length × width = 50mm × 150mm) is cut. A cut 52 (length: 75mm) is added from one end of the center of the short side of the cutting guide strip 60A (65A), which is formed transversely across the test piece. The cut 52 is formed by passing through the center of the cutting guide strip 60A (65A). Figure 13 As shown, the two ends torn apart by the cut 52 are clamped by clamps 54 and 56 respectively, and pulled vertically at a test speed of 200 mm / min to tear the cutting guide strip 60A (65A). The strength of the test piece from the start of tearing to the completion of tearing is measured. The maximum value of the measured value is taken as the tear strength of this disclosure. The laminated film portion 92 (laminated film 92) can also be measured in the same way.

[0090] Figure 14 Represented by dashed lines Figure 1 and Figure 2 The packaging bag 100 (packaging body 200) shown is formed with adhesive 95 contained in a receiving portion 88 between a pair of laminated film portions 91, 92. As described above, Figure 1 , Figure 2 and Figure 10 The packaging body 200 (210) shown includes a packaging bag 100 (110) and an adhesive contained in the receiving portion of the packaging bag 100 (110). The packaging bag 100 (110) can effectively prevent tearing during opening from detaching from the cutting guide strips 60A, 60B (65A, 65B) and moving in a predetermined direction, and can stably form a pinching portion 75. Therefore, the packaging body 200 (210) can smoothly remove the adhesive. In addition, the packaging bag 100 (110) of the packaging body 200 (210) has a sealing portion 70, which can seal the packaging body after opening and maintain the effectiveness of the adhesive at a high level for a long time.

[0091] The packaging bag 100 (110) and packaging body 200 (210) disclosed herein can be manufactured, for example, by the following steps. First, a polyethylene resin layer 76, a barrier layer 74, and a sealing layer 72 are laminated onto a paper or resin film, which serves as a substrate layer 78, using a known method to obtain laminated films 91 and 92. A metal cutting tool is pressed against the front side of the substrate layer 78 of the laminated films 91 and 92 to form cutting guide strips 60A and 60B. Examples of metal cutting tools include rotary cutting tools and push cutting tools. A laser can also be used instead of a metal cutting tool to form the cutting guide strips 60A and 60B.

[0092] Sealing layers 72, with cut guide strips 60A and 60B forming laminated films 91 and 92, are placed opposite each other and bonded together with a fastener tape (e.g., a fastener tape) serving as a closure portion 70, forming a sealing portion 87 at a position corresponding to the upper end 84 and the side ends 81 and 82. This creates a non-sealed portion surrounded by the "ko"-shaped sealing portion 87. The sealing portion 87 is cut and trimmed to divide the product into individual bags. Packaging bags are manufactured as described above. The packaging bags of this disclosure also include a configuration where, as described above, the packaged item is not contained and part of the outer edge is not sealed.

[0093] Then, notches 61 and 62 (notches 64 and 66) are formed on the cutting guide strips 60A and 60B at the side ends 81 and 82. The packaged item is received from the unsealed lower end 85. Then, the laminated films 91 and 92 are bonded to the lower end 85, and a sealing portion 87 is also formed at the lower end 85. As described above, a package 200 (210) in which the packaged item is received in the receiving portion of the packaging bag 100 (110) can be manufactured. However, the method of manufacturing the packaging bag and the package is not limited to the method described above.

[0094] The above describes several embodiments of the present disclosure. The illustrated packaging bag 100 (110) has a laminated film 91 on the front side and a laminated film 92 on the back side, and each of the front and back sides has a cutting guide strip 60A, 60B (65A, 65B) extending in a strip shape in a transverse direction (x direction) from one end 81 to the other end 82. The cutting guides 60A and 60B (65A and 65B) sequentially include, from the upper end side: a first guide 10A and 10B having a plurality of first cutting lines 12 that are inclined at a predetermined angle relative to the transverse direction (x direction) and arranged parallel to each other; a second guide 20A and 20B having a plurality of sewing-line-like second cutting lines 22 that are inclined at a predetermined angle relative to the transverse direction in the direction opposite to the first cutting lines 12 and arranged parallel to each other at predetermined intervals; and a third guide 30A and 30B having a plurality of third cutting lines 32 that are inclined at a predetermined angle relative to the transverse direction (x direction) in the same direction as the first cutting lines 12 and arranged parallel to each other. The packaging bag 100 (110) has a fourth seam line 42 extending in the transverse direction, which is a stitch line-like feature, between the first guide strips 10A, 10B and the second guide strips 20A, 20B, and / or between the second guide strips 20A, 20B and the third guide strips 30A, 30B. The first seam line 12, the second seam line 22, the third seam line 32 and the fourth seam line 42 are separated from each other. The first seam line 12, the second seam line 22 and the third seam line 32 are each inclined in opposite directions relative to the transverse direction (x direction) on the front and back sides.

[0095] This disclosure is not limited to any of the embodiments described above. For example, the laminated film (laminated film portion) may have any layers or films between the layers without significantly impairing the function of the laminated film. The shape of the packaging bag is not limited to a four-side seal bag. For example, it may also be a two-side seal bag, a three-side seal bag, or a back seal bag. The packaging bag may also not have a closure or a notch. The notch is not limited to a V-shape or a U-shape; for example, it may also be an I-shape or a group of scratches.

[0096] [Example]

[0097] The present disclosure will now be described in more detail with reference to the embodiments, but the present disclosure is not limited to the embodiments described below.

[0098] (Example 1)

[0099] A metal rotating blade presses the front side of a biaxially extending polyethylene terephthalate (PET) film (16μm thickness) to create a slit line, forming a... Figure 3The cutting guide strip 60A is shown. Then, an anchor coat is applied to the PET film by extrusion lamination, and a 20 μm thick biaxially oriented polyethylene film is laminated with a 7 μm thick aluminum foil as a barrier layer. Next, an anchor coat is applied to the aluminum foil, and a 25 μm thick polyethylene film is laminated as a sealing layer. As described above, a product having the following characteristics is obtained. Figure 9 The laminated membrane with the layered structure shown is approximately as follows. The dimensions of each guide band and slit line are approximately as shown below.

[0100] Cut the guide strip 60A to a width of 7.2mm.

[0101] Width of the first guide band 10A: 0.9mm

[0102] Width of the second guide strip 20A: 4.2mm

[0103] Width of the third guide band 30A: 0.9mm

[0104] Width of the 4th guide band 40A: 1.2mm

[0105] <First seam line 12>

[0106] L1=1.5mm, D1=0.9mm, S1=2.2mm, θ1=35°

[0107] <Second incision line 22>

[0108] L2=1.2mm, D2=0.6mm, S2=1.4mm, θ2=40°

[0109] <Third incision line 32>

[0110] L3=1.5mm, D3=0.9mm, S3=2.2mm, θ3=35°

[0111] <4th incision line 42>

[0112] L4 = 2.2mm, D4 = 0.6mm

[0113] In the process of laminating film into Figure 12 After taking the rectangular test piece shown (length × width = 50mm × 150mm), as follows: Figure 13 As shown, the tear strength was determined in accordance with JIS K 7128-1:1998. The measured values ​​were 0.35 N to 0.5 N, with a maximum value (tear strength) of 0.5 N.

[0114] Industrial availability

[0115] According to this disclosure, a packaging bag and packaging body can be provided that can be opened smoothly and the packaged item can be easily removed. Furthermore, a packaging bag and packaging body can be provided that can effectively prevent tearing during opening from detaching from the cutting guide and moving in a predetermined direction.

[0116] Symbol Explanation

[0117] C1, C2, C3, C4, C5, C6: Cut wire;

[0118] D1, D2, D3, S1, S2, S3: Intervals;

[0119] θ1, θ2, θ3: Angles;

[0120] 10A, 10B: First guide band;

[0121] 12: First suture line;

[0122] 20A, 20B: Second guide strip;

[0123] 22: Second suture line;

[0124] 22a, 42a: Wired portion;

[0125] 22b, 42b: Wireless section;

[0126] 30A, 30B: Third guide strip;

[0127] 32: Third suture line;

[0128] 40A, 40B: Fourth guide strip;

[0129] 41A, 41B: Fifth guide strip;

[0130] 42: Fourth suture line;

[0131] 54, 56: Fixtures;

[0132] 60A, 60B, 65A, 65B: Cut the guide strip;

[0133] 61, 62, 64, 66: Notch;

[0134] 70: Enclosed section;

[0135] 72: Sealing layer;

[0136] 74: Barrier layer;

[0137] 75: The pinching part;

[0138] 76: Polyethylene resin layer;

[0139] 78: Substrate layer;

[0140] 81, 82: Side ends;

[0141] 84: Upper end;

[0142] 85: Lower end;

[0143] 87: Sealing part;

[0144] 88: Containment Department;

[0145] 91, 92: Laminated film section (laminated film);

[0146] 95: Adhesive;

[0147] 100, 110: Packaging bags;

[0148] 100A, 110A: Front view;

[0149] 100B, 110B: Back side;

[0150] 200, 210: Packaging body;

[0151] VL11, VL12, VL21, VL22, VL31, VL32: Imaginary lines.

Claims

1. A packaging bag comprising a first laminated film portion on the front side, a second laminated film portion adhered to the back side of the first laminated film portion, and a cutting guide strip extending in a strip-like manner in each of the front and back sides in a transverse direction from one end to the other. The cutting guide strip, starting from the upper end side, has the following features: The first guide belt has a plurality of first slit lines that are inclined at a predetermined angle relative to the transverse direction and arranged parallel to each other; The second guide belt has multiple stitch-like second slit lines that are inclined at a predetermined angle relative to the transverse direction and in a direction opposite to the first slit line, and arranged parallel to each other at predetermined intervals; and The third guide strip has multiple third slit lines that are inclined at a predetermined angle relative to the transverse direction and are arranged parallel to each other in the same direction as the first slit line; Between the first guide belt and the second guide belt, and / or between the second guide belt and the third guide belt, there is a fourth cut line in the shape of a stitch line extending along the transverse direction; The first suture line, the second suture line, the third suture line, and the fourth suture line are separated from each other; The first, second, and third seam lines on the front side and the first, second, and third seam lines on the back side are inclined in opposite directions relative to the transverse direction. The configuration of the fourth slit line differs between the front and the back sides; The front side is, The fourth slit line is located between the second guide band and the third guide band. When viewed along the transverse direction, both the second and third cut lines are inclined toward the fourth cut line; The back side is, The fourth slit line is located between the first guide band and the second guide band. When viewed along the transverse direction, both the first and second cut lines are inclined toward the fourth cut line.

2. The packaging bag as described in claim 1, wherein, On the front side, an imaginary line parallel to the transverse direction and passing through the lower ends of the plurality of the first seam lines intersects with at least a portion of the stitch-line-shaped second seam line. On the back side, an imaginary line parallel to the transverse direction and passing through the upper ends of the plurality of third seam lines intersects with at least a portion of the stitch-like second seam lines.

3. The packaging bag as described in claim 1 or 2, wherein, The second slit line on the front and the second slit line on the back are staggered from each other in the vertical direction.

4. The packaging bag as described in claim 1 or 2, wherein, The width of the cutting guide strip is 4mm or more.

5. The packaging bag as described in claim 1 or 2, wherein, The cutting guide band extends from one end to the other end. The second guide band includes a notch at its side end.

6. The packaging bag as described in claim 1 or 2, wherein, have: The containment department houses packaged items; and A closing portion is disposed between the receiving portion and the cutting guide strip, configured to close the receiving portion after it has been opened along the cutting guide strip.

7. The packaging bag as described in claim 1 or 2, wherein, The first laminated film portion and the second laminated film portion respectively have a laminated structure in which a sealing layer, an inorganic barrier layer, a polyethylene resin layer and a substrate layer are stacked sequentially from the inside.

8. The packaging bag as described in claim 1 or 2, wherein, The tear strength of each of the first and second laminated film portions when torn along the cutting guide is 0.1 N to 2.0 N.

9. A packaging body comprising a packaging bag according to any one of claims 1 to 8, and an adhesive contained in a receiving portion of the packaging bag.

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