JP6662012B2 - Packaging bag - Google Patents

Description

  The present invention relates to a packaging bag, and more particularly, to a packaging bag that can be opened from one side seal portion to the other side seal portion with fingers.

  In recent years, packaging bags containing contents, such as retort pouches, have been widely used. Many of such packaging bags are opened by tearing a portion close to the upper seal portion from one side seal portion to the other side seal portion with a finger. Therefore, an easy-opening portion such as a notch or a cut is formed in a side seal portion of many packaging bags. Further, in Patent Document 1 below, in order to facilitate opening, a cutting start flaw processing is performed on a peripheral heat-welded portion, and a cutting continuous flaw processing is performed on a non-heat-fused portion following the cutting start flaw processing. A flexible packaging bag is disclosed.

JP 2003-137308 A

  By the way, when opening a packaging bag containing viscous contents such as retort curry, it is desired not only to tear the packaging bag from one end to the other, but also to tear apart the torn fragments. If the broken fragments remain without being separated, the contents adhering to the broken fragments may adhere to hands when the contents are taken out. Also, if the forearm fragments are forcibly shredded, the contents attached to the torn fragments may be scattered around by the momentum.

  Here, FIGS. 22 and 23 show how a conventional packaging bag is opened. The packaging bag of the conventional example is a flat pouch in which a front film 101a and a back film 101b are overlapped and heat sealed on four sides by left and right side seal portions 102 and 104, a top seal portion 106, and a bottom seal portion 108. In the example shown in FIGS. 22 and 23, the packaging bag is opened from the notch 110 of the left side seal portion 102 to the right side seal portion 104. As the broken pieces 100 move to the right, breaking lines 110a and 110b that tear the front film 101a and the back film 101b are formed toward the right side seal portion 104.

  In the storage portion between the left and right side seal portions 102 and 104, as shown in FIG. 23, the break line 110a of the front film 101a and the break line 110b of the back film 101b are shifted vertically. As a result, the break line 110a and the break line 110b often reach different positions on the inner edge 104a of the right side seal portion 104.

  FIG. 24 is an enlarged view of a portion surrounded by a broken line C in FIG. On the inner edge 104a of the side seal portion 104, the reaching point Pa of the breaking line 110a of the front film 101a and the reaching point Pb of the breaking line 110b of the back film 101b are separated by a distance W. In order to further tear the side seal portion 104 from the arrival points Pa and Pb, it is necessary to peel off the fused portion of the side seal portion 104 at the width of the interval W. However, since a large force is required to break the side seal portion 104 while peeling it off, it often becomes difficult to separate the broken pieces 100.

  The present invention has been made in view of the above circumstances, and when the packaging bag is broken from one side seal portion to the other side seal portion and opened, the attached contents are scattered around. It is another object of the present invention to provide a packaging bag from which broken pieces can be easily separated.

  As a result of various experiments and studies, the inventor of the present invention has found that when the packaging bag is opened, the cutting line of the front film and the cutting line of the back film are moved from one side seal portion to the other side seal portion. When the same point on the inner edge is finally reached, there is no need to peel the front film and the back film with a large force at the other side seal portion, and the other side seal portion is torn with a small shearing force, and We focused on the fact that broken fragments can be easily separated.

Therefore, the packaging bag of the present invention has a pair of side seal portions for sealing both side edges of the superposed front film and the back film, and a top seal portion for sealing the top edges of the front film and the back film. A packaging bag in which an easy-open portion is formed in one side seal portion of the pair of side seal portions, provided in the front film in a region between the pair of side seal portions of the front film and the back film. Having a front opening guide line and a back opening guide line provided on the back film, wherein the front opening guide line and the back opening guide line are arranged from the easy opening portion toward the other side seal portion. An end portion of the front opening guide line closer to the other side seal portion, the end portion being inclined with respect to an opening virtual straight line extending in a direction orthogonal to a symmetry axis extending in a longitudinal direction of the packaging bag, and the back opening guide. The end of the line near the other side seal is overlapped on the inner edge of the other side seal portion or near the inner edge, or on the lower edge of the top seal portion or near the lower edge. The end of each of the front opening guide line and the back opening guide line near the one side seal portion is located below the opening virtual straight line, and each of the front opening guide line and the back opening guide line. The end near the other side seal portion is located above the opening imaginary straight line, or the end near the other side seal portion of each of the front opening guide line and the back opening guide line is , On the inner edge of the other side seal portion or near the inner edge, the end of the front opening guide line and the back opening guide line closer to the one side seal portion is more than the opening virtual straight line. Upper side Position, and the table opening guide wire and the other of the side seal portion side of the end portion of each of the back opening guide wire is characterized in that located on the lower side than the opening imaginary straight line.
Further, the packaging bag of the present invention has a pair of side seal portions for sealing both side edges of the superposed front film and the back film, and a top seal portion for sealing the top edges of the front film and the back film. A packaging bag in which an easy-open portion is formed in one side seal portion of the pair of side seal portions, provided in the front film in a region between the pair of side seal portions of the front film and the back film. Having a front opening guide line and a back opening guide line provided on the back film, wherein the front opening guide line and the back opening guide line are arranged from the easy opening portion toward the other side seal portion. An end portion of the front opening guide line near the other side seal portion extends obliquely with respect to an opening virtual straight line extending in a direction orthogonal to the symmetry axis extending in the longitudinal direction of the packaging bag, and the back opening guide. The other end of the side seal closer to the end, on the inner edge of the other side seal portion or near the inner edge, or on the lower edge of the top seal portion or near the lower edge, overlap each other, An end of each of the front opening guide line and the back opening guide line near the one side seal portion is located on a lower edge of the top seal portion.
Further, the packaging bag of the present invention has a pair of side seal portions for sealing both side edges of the superposed front film and the back film, and a top seal portion for sealing the top edges of the front film and the back film. A packaging bag in which an easy-open portion is formed in one side seal portion of the pair of side seal portions, provided in the front film in a region between the pair of side seal portions of the front film and the back film. Having a front opening guide line and a back opening guide line provided on the back film, wherein the front opening guide line and the back opening guide line are arranged from the easy opening portion toward the other side seal portion. An end portion of the front opening guide line near the other side seal portion extends obliquely with respect to an opening virtual straight line extending in a direction orthogonal to the symmetry axis extending in the longitudinal direction of the packaging bag, and the back opening guide. The other end of the side seal closer to the end, on the inner edge of the other side seal portion or near the inner edge, or on the lower edge of the top seal portion or near the lower edge, overlap each other, An end of each of the front opening guide line and the back opening guide line near the other side seal portion is a distance of 28% or more of a length along the opening virtual straight line between inner edges of the pair of side seal portions. Only the opening virtual straight line.
Further, the packaging bag of the present invention has a pair of side seal portions for sealing both side edges of the superposed front film and the back film, and a top seal portion for sealing the top edges of the front film and the back film. A packaging bag in which an easy-open portion is formed in one side seal portion of the pair of side seal portions, provided in the front film in a region between the pair of side seal portions of the front film and the back film. Having a front opening guide line and a back opening guide line provided on the back film, wherein the front opening guide line and the back opening guide line are arranged from the easy opening portion toward the other side seal portion. An end portion of the front opening guide line near the other side seal portion extends obliquely with respect to an opening virtual straight line extending in a direction orthogonal to the symmetry axis extending in the longitudinal direction of the packaging bag, and the back opening guide. The other end of the side seal closer to the end, on the inner edge of the other side seal portion or near the inner edge, or on the lower edge of the top seal portion or near the lower edge, overlap each other, The end of each of the front opening guide line and the back opening guide line near the one side seal portion is the end of the front opening guide line and the back opening guide line located on the inner edge of the one side seal portion. Each of the other end portions near the other side seal portion is located apart from the virtual opening straight line by a distance of 38% or more of the length along the virtual opening straight line between the inner edges of the pair of side seal portions. It is characterized by having.
Further, the packaging bag of the present invention has a pair of side seal portions for sealing both side edges of the superposed front film and the back film, and a top seal portion for sealing the top edges of the front film and the back film. A packaging bag in which an easy-open portion is formed in one side seal portion of the pair of side seal portions, provided in the front film in a region between the pair of side seal portions of the front film and the back film. Having a front opening guide line and a back opening guide line provided on the back film, wherein the front opening guide line and the back opening guide line are arranged from the easy opening portion toward the other side seal portion. An end portion of the front opening guide line near the other side seal portion extends obliquely with respect to an opening virtual straight line extending in a direction orthogonal to the symmetry axis extending in the longitudinal direction of the packaging bag, and the back opening guide. The other end of the side seal closer to the end, on the inner edge of the other side seal portion or near the inner edge, or on the lower edge of the top seal portion or near the lower edge, overlap each other, An end of each of the front opening guide line and the back opening guide line near the other side seal portion is below the opening virtual straight line, and an inner edge of the pair of side seal portions is located from the opening virtual straight line. And a distance within 23% of the length along the opening virtual straight line.
Further, the packaging bag of the present invention has a pair of side seal portions for sealing both side edges of the superposed front film and the back film, and a top seal portion for sealing the top edges of the front film and the back film. A packaging bag in which an easy-open portion is formed in one side seal portion of the pair of side seal portions, provided in the front film in a region between the pair of side seal portions of the front film and the back film. Having a front opening guide line and a back opening guide line provided on the back film, wherein the front opening guide line and the back opening guide line are arranged from the easy opening portion toward the other side seal portion. An end portion of the front opening guide line near the other side seal portion extends obliquely with respect to an opening virtual straight line extending in a direction orthogonal to the symmetry axis extending in the longitudinal direction of the packaging bag, and the back opening guide. The other end of the side seal closer to the end, on the inner edge of the other side seal portion or near the inner edge, or on the lower edge of the top seal portion or near the lower edge, overlap each other, An end of each of the front opening guide line and the back opening guide line near the one side seal portion is located on an inner edge of the one side seal portion.

  Thus, in the packaging bag of the present invention, the end of the front opening guide line near the other side seal portion and the end of the back opening guide line near the other side seal portion have the inner edge of the other side seal portion. Unsealing guide lines are provided so as to overlap each other near the upper or inner edge, or above or near the lower edge of the top seal portion. Therefore, when the packaging bag is broken and opened from one side seal portion to the other side seal portion, the break line of the front film and the break line of the back film that have reached the front opening guide line and the back opening guide line, respectively. Are guided by the front opening guide line and the back opening guide line so as to merge and overlap on the inner edge of the other side seal portion or until reaching the inner edge. As a result, the break line of the front film guided to the front opening guide line and the break line of the back film guided to the back opening guide line merge, and finally to the same point on the inner edge of the other side seal portion. To reach. As a result, the other side seal portion can be torn with a small shearing force, so that the broken pieces of the packaging bag can be easily separated.

  ADVANTAGE OF THE INVENTION According to the packaging bag of this invention, when a packaging bag is fractured | ruptured from one side seal part to the other side seal part, and it opens, a broken piece can be easily cut off.

It is a top view of the packaging bag by a 1st embodiment of the present invention. It is a top view showing the structure of the opening guide line in the packaging bag by a 1st embodiment of the present invention. It is a top view for explaining guidance of a break line by an opening guide line at the time of opening in a packing bag by a 1st embodiment of the present invention. It is an explanatory view showing the opened state of the packaging bag by a 1st embodiment of the present invention. It is an explanatory view showing the opened state of the packaging bag by a 1st embodiment of the present invention. It is an explanatory view showing the opened state of the packaging bag by a 1st embodiment of the present invention. It is an explanatory view showing the opened state of the packaging bag by a 1st embodiment of the present invention. It is a top view showing the modification of the packaging bag by a 1st embodiment of the present invention. It is a top view for explaining guidance of a break line by an opening guide line at the time of opening in a modification of a packaging bag by a 1st embodiment of the present invention. It is a top view of a packaging bag by a 2nd embodiment of the present invention. It is a top view of a packaging bag by a 3rd embodiment of the present invention. It is a top view for explaining guidance of a break line by an opening guide line at the time of opening in a packing bag by a 3rd embodiment of the present invention. It is a top view of a packaging bag by a 4th embodiment of the present invention. It is a top view of a packaging bag by a 5th embodiment of the present invention. It is a top view of a packaging bag by a 6th embodiment of the present invention. It is a top view of a packaging bag by a 7th embodiment of the present invention. It is a top view of a packaging bag by an 8th embodiment of the present invention. It is a top view of a packaging bag by a 9th embodiment of the present invention. It is a top view of a packaging bag by a 10th embodiment of the present invention. It is a top view for explaining guidance of a break line by an opening guide line at the time of opening in a packaging bag by a 10th embodiment of the present invention. It is a top view of a packaging bag by an 11th embodiment of the present invention. It is a top view showing the state of opening of the packaging bag of the conventional example. It is a top view showing the state of opening of the packaging bag of the conventional example. FIG. 24 is an enlarged view of a portion surrounded by a broken line C in FIG. 23.

Hereinafter, an embodiment of a packaging bag of the present invention will be described with reference to the drawings.
(1st Embodiment)
FIG. 1 shows a plan view of the packaging bag of the first embodiment. In the packaging bag of the present embodiment, the four sides of the superposed front film 1a and back film 1b (see FIGS. 4 to 7) are separated by a pair of side seal portions 2, 4, a top seal portion 6, and a bottom seal portion 8. It is a heat-sealed flat pouch, and the contents are hermetically packaged between the front film 1a and the back film 1b in a region surrounded by the seal portions 2, 4, 6, and 8.

The front film 1a and the back film 1b are each formed of, for example, a laminated film in which a nylon layer is laminated on a polyolefin layer.
The front film 1a and the back film 1b can employ various materials and configurations that can be thermally welded. For example, the front film 1a and the back film 1b may be constituted by a single-layer film made of a heat-sealable thermoplastic resin, or may be constituted by a laminated film having a welding surface made of a heat-sealable resin. The laminated film may have a laminated structure in which a barrier layer is provided in an intermediate layer, or may have a laminated structure in which a barrier layer is provided in a surface layer. Further, the laminated film may use a resin layer as a base material or paper as a base material.

In an unsealed region between the pair of side seal portions 2 and 4 of the front film 1a and the back film 1b, a front opening guide line 14 provided on the front film 1a and a back opening guide provided on the back film 1b. A line 14 is provided. In FIG. 1, the front opening guide line and the back opening guide line 14 are indicated by a single line.
The front opening guide line and the back opening guide line 14 obliquely intersect the opening virtual line 12 and extend in a direction from the lower left to the upper right. The imaginary opening straight line 12 extends from the easy-opening portion 10 of the notch formed in one side seal portion (hereinafter also referred to as “left side seal portion”) 2 to the other side seal portion 4 (hereinafter “right side seal portion”). ) Is a virtual line extending in a direction orthogonal to the symmetry axis 11 extending in the longitudinal direction of the packaging bag toward the packaging bag, and a portion 1c above the easy-opening portion 10 at the time of opening (hereinafter, also referred to as a “fragment fragment”). Is an imaginary line along the direction in which the finger is pulled.

  When the packaging bag has a rectangular shape having a pair of linear side seal portions 2 and 4 parallel to each other and a top seal portion 6 extending in a direction perpendicular to these, as in the present embodiment, FIG. As shown in FIG. 1, the axis of symmetry 11 extends in the center between the pair of side seals 2 and 4 in parallel with the pair of side seals 2 and 4, and is also orthogonal to the linear top seal 6, and is virtually The straight line 12 extends in parallel with the linear lower edge 6a of the top seal portion 6.

  The angle θ formed by each of the front opening guide line and the back opening guide line 14 with the opening virtual straight line 12 is preferably 10 to 50 °, and more preferably 20 to 45 °. When the angle θ is larger than 50 °, the component force in the direction along the opening guide line 14 out of the pulling force along the opening virtual straight line 12 at the time of unsealing becomes small, and it is difficult to tear along the opening guide line 14. On the other hand, when the angle θ is smaller than 10 °, the possibility that the breaking line does not reach the opening guide line 14 at the time of opening is increased.

  Ends (hereinafter, also referred to as “ends”) 14 b of the front opening guide line and the back opening guide line 14 near the right side seal portion 4 overlap each other on the inner edge 4 a of the right side seal portion 4. Thereby, at the time of opening, the breaking line 10a of the front film 1a and the breaking line 10b of the back film 1b are directly guided to one point on the inner edge 4a of the right side seal portion 4 by the front opening guide line and the back opening guide line 14. You.

  In addition, if the end line 14b can substantially guide the break line 10a of the front film 1a and the break line 10b of the back film 1b to one point on the inner edge 4a of the right side seal portion 4, it will be on the inner edge 4a of the right side seal portion 4. It may not be located, and may be located near the inner edge 4a. Here, the end 14b near the inner edge 4a is preferably located within 10 mm from the inner edge 4a. The same applies to other embodiments described later.

  In addition, the respective ends (hereinafter, also referred to as “start ends”) 14 a of the front opening guide line and the back opening guide line 14 near the left side seal portion 2 are separated from the opening virtual straight line 12 by a predetermined distance L or more. Is located. On the other hand, an end (end) 14b of the opening guide wire 14 near the right side seal portion 4 is located above the opening virtual straight line 12 by a predetermined distance L or more.

  Here, the predetermined distance L is preferably a distance of 28% or more of the length D along the opening virtual straight line 12 between the inner edges 2a and 4a of the pair of side seal portions 2 and 4, and more preferably 38% or more. (The same applies to other embodiments described later). The ratio of the distance to the length D is experimentally obtained so as to include a range in which a break line is formed when the packaging bag is opened. By arranging the start end 14a and the end 14b of each of the front opening guide line and the back opening guide line 14 at a predetermined distance L or more from the opening imaginary straight line 12, the break line reaches the opening guide line 14 at the time of opening. Probability can be increased.

  FIG. 2 shows an example of the front opening guide line and the back opening guide line 14 of the present embodiment. The front opening guide line and the back opening guide line 14 shown in FIG. 2 are configured by the edge 15a of the reinforced portion 15 that is less likely to break than the front film 1a and the back film 1b. The reinforcing portion 15 may be formed by partially fusing or bonding the front film 1a and the back film 1b, or may be formed by a member or the like on the outer surface side, the inner surface side, or between the front film 1a and the back film 1b. It may be formed by providing a tape. When the front film 1a and the back film 1b are partially fused or adhered, the edges of the fused or adhered portions of the front film 1a and the back film 1b are formed by the front opening guide line and the back opening guide line 14, respectively. Becomes The breaking line that reaches the edge 15a of the reinforcing portion 15 at the time of unsealing proceeds along the edge 15a of the reinforcing portion 15 because the reinforcing portion 15 is hard to break. Therefore, the edge 15a of the reinforcing portion 15 functions as the front opening guide line and the back opening guide line 14 described above.

  Further, the front opening guide line and the back opening guide line 14 may be configured by a weakened portion that is more easily broken than the front film 1a and the back film 1b. Since the break line that has reached the weakened portion at the time of opening proceeds along the weakened portion that is more easily broken than the surroundings, the weakened portion functions as the front opening guide line and the back opening guide line 14. The weakened portion can be formed as a non-penetrating half-cut portion on each of the front film 1a and the back film 1b. The half-cut processing part is formed by various methods such as laser processing, knife processing using a roll or a punch having a fine blade attached to the surface, and polishing processing pressing with a roll having high hardness abrasive grains attached. An appropriate method may be selected from these methods to form a straight or perforated, non-penetrating half-cut portion.

  In the present embodiment, the front opening guide line 14 for guiding the break line 10a of the front film 1a and the back opening guide line 14 for guiding the break line 10b of the back film 1b share a common portion like a fused portion. It is assumed that the front opening guide line 14 formed on the front film 1a and the back opening guide line 14 formed on the back film 1b are formed at positions overlapping each other. explain. The same applies to the following embodiments.

  Next, opening of the packaging bag of the present embodiment will be described with reference to FIGS. In FIG. 3, the positions of the break line 10 a of the front film 1 a (hereinafter also referred to as “front break line”) and the break line 10 b of the back film 1 b (hereinafter also referred to as “back break line”) at the time of opening are shown in FIG. It is shown over the packaging bag in the state.

  When opening the packaging bag from the easy-opening portion 10 of the left side seal portion 2 to the right side seal portion 4, by pulling the portion above the easy-opening portion 10 toward the right side seal portion 4 with a finger, The left side seal part 2 is broken from the easy-open part 10. Then, the portion above the easy-open portion 10 becomes the broken piece 1c.

  When the broken piece 1c is further pulled to the right, the front film 1a and the back film 1b are torn at the storage portion between the pair of side seal portions 2 and 4, and the front break line 10a and the back break line 10b are moved to the right side seal portion 4. Extending towards. At this time, as shown in FIG. 3, a front-back misalignment occurs in which the front break line 10a and the back break line 10b are vertically displaced.

  In the present embodiment, as shown in FIG. 4, first, the front break line 10a of the front film 1a reaches a point P1 on the front opening guide line 14. The table breaking line 10a that has reached the point P1 proceeds along the front opening guide line 14 in the direction indicated by the arrow A1 in FIG.

  Next, as shown in FIG. 5, the back break line 10b reaches the point P2 on the back opening guide line 14, and merges with the front break line 10a that has advanced along the front opening guide line 14. The front break line 10a and the back break line 10b that merge at the point P2 travel along the front opening guide line and the back opening guide line 14 in the direction indicated by the arrow A2 in FIG.

  Then, as shown in FIG. 6, both the front break line 10a and the back break line 10b reach the respective ends 14b of the front opening guide line and the back opening guide line 14. These ends 14b are arranged so as to overlap with each other at a point P3 on the inner edge 4a of the right side seal portion 4. For this reason, the front break line 10a and the back break line 10b are directly guided by the front opening guide line and the back opening guide line 14 to the point P3 which is the same point on the inner edge 4a of the right side seal portion 4.

  When the fractured piece 1c is further pulled to the right in the drawing, as shown in FIG. 7, a single fracture line 10c where the front fracture line 10a and the rear fracture line 10b join extends from the point P3 to the right side seal part 4. Then, the right side seal portion 4 is broken. At this time, since there is only one breaking line 10c of the right side seal portion 4, it is not necessary to peel the front film 1a and the back film 1b with a large force in the right side seal portion 4, and the right side seal portion 4 has a small shear force. The part 4 can be torn. As a result, the fragment 1c can be easily separated.

  Further, as shown in FIG. 1, the front opening guide line and the back opening guide line 14 extend along the direction from the lower left to the upper right, so that the front break line 10a reaching the opening guide line 14 from the left and The back break line 10b is guided upward from the arrival point along the front opening guide line and the back opening guide line 14. As a result, the front break line 10a and the back break line 10b do not proceed below the front opening guide line and the back opening guide line 14, but break down to below the upper surface of the contents upon opening and the contents are spilled. Can be prevented.

(Modification)
In the above-described first embodiment, an example is shown in which the front opening guide line 14 that guides the front break line 10a and the back opening guide line 14 that guides the back break line 10b have a common configuration or overlap. However, the front opening guide line and the back opening guide line 14 may be separately arranged.

  FIG. 8 shows a modification of the first embodiment. In this modification, the front opening guide line and the back opening guide line are a front opening guide line 16 that guides a break line (front break line) 10a of the front film 1a, and a break line (back break line) 10b of the back film 1b. Are formed on the front film 1a and the back film 1b as edges of the weakened portion or the strengthened portion, respectively.

  An end (starting end) 16a of the front opening guide line 16 near the left side seal portion 2 and an end (starting end) 17a of the back opening guide line 17 near the left side seal portion 2 are arranged at different positions. On the other hand, the end (end) 16b of the front opening guide wire 16 near the right side seal portion 4 and the end (end) 17b of the back opening guide wire 17 near the right side seal portion 4 are connected to the right side seal portion 4. They overlap at a point P3 on the inner edge 4a.

Next, opening of the packaging bag of the present modified example will be described with reference to FIG. FIG. 9 shows the positions of the front break line 10a and the back break line 10b at the time of opening the package in an unopened state.
At the time of opening, the front break line 10 a and the back break line 10 b extend from the left side seal portion 2 toward the right side seal portion 4. As a result, the front break line 10a reaches the point P1 on the front opening guide line 16, and proceeds along the front opening guide line 16 in the direction of arrow A1 in FIG. On the other hand, the back breaking line 10b reaches the point P2 on the back opening guide line 17, and proceeds along the back opening guide line 17 in the direction of arrow A2 in FIG.

  The end 16b of the front opening guide line 16 and the end 17b of the back opening guide line 17 are arranged at the same point P3 on the inner edge 4a of the right side seal portion 4. For this reason, the front break line 10a and the back break line 10b merge at a point P3. As a result, the right side seal part 4 can be torn with a small shearing force, and one break line 10c can travel along the right side seal part 4 from the point P3, and the broken pieces can be easily separated.

(2nd Embodiment)
Next, a packaging bag according to a second embodiment will be described with reference to FIG.
Note that the packaging bags of the following embodiments are substantially the same as those of the first embodiment except for an opening guide line, and therefore, the same components are denoted by the same reference numerals and detailed description thereof will be omitted. I do. Also, in each of the following embodiments, similarly to the first embodiment and its modifications, the opening guide line may be formed as a weakened portion, or may be formed as an edge of a reinforced portion, The front film and the back film may be arranged at different positions. In each of the following embodiments, the preferred range of the angle formed by the opening guide line and the opening virtual straight line 12 is the same as that in the first embodiment. In each of the following embodiments, an end of the opening guide line near the left side seal portion 2 is referred to as a starting end, and an end near the right side seal portion 4 is referred to as an end.

  As shown in FIG. 10, the front opening guide line and the back opening guide line 18 in the packaging bag of the present embodiment obliquely intersect with the opening virtual straight line 12 and extend along the direction from the lower left to the upper right. . Each end 18b of the front opening guide line and the back opening guide line 18 is separated from the imaginary opening straight line 12 on the inner edge 4a of the right side seal portion 4 by a predetermined distance L or more, similarly to the first embodiment. Overlap each other in position. Thereby, the probability that the breaking line reaches the front opening guide line and the back opening guide line 14 during opening can be increased.

  On the other hand, the starting end 18a of each of the front opening guide line and the back opening guide line 18 is arranged on the inner edge 2a of the left side seal portion 2. As a result, at the time of unsealing, the breaking line that proceeds below the unsealing virtual straight line 12 reliably reaches the unsealing guide line 18.

  At the time of opening, the front break line and the back break line respectively reach the front opening guide line and the back opening guide line 18 and merge, and reach the end 18 b on the inner edge 4 a of the right side seal portion 4. Thereby, also in the present embodiment, the right side seal portion 4 can be torn by a small shearing force, and a single breaking line advances from the terminal end 18b to the right side seal portion 4 to easily separate the broken fragments. it can.

(Third embodiment)
Next, a packaging bag according to a third embodiment will be described with reference to FIG.
Note that the easy-opening portion 10 of the packaging bag of the present embodiment is provided at a position closer to the top seal portion 6 than that of the first embodiment.

  As shown in FIG. 11, the front opening guide line and the back opening guide line 20 in the packaging bag of the present embodiment obliquely intersect with the opening virtual straight line 12 and extend along the direction from the lower left to the upper right. . The start end 20a of each of the front opening guide line and the back opening guide line 20 is located at a predetermined distance L or more below the opening virtual straight line 12, as in the first embodiment. Thereby, the probability that the break line reaches the opening guide line 20 at the time of opening can be increased.

  On the other hand, the ends 20b of the front opening guide line and the back opening guide line 20 are located on the lower edge 6a of the top seal portion 6 so as to overlap each other. As a result, at the time of unsealing, the break line that advances above the opening virtual line 12 reliably reaches the unsealing guide line 20.

Next, opening of the packaging bag of the present embodiment will be described with reference to FIG. FIG. 12 shows the positions of the front break line 10a and the back break line 10b at the time of opening the package in an unopened state.
At the time of opening, the front break line 10 a and the back break line 10 b extend from the left side seal portion 2 toward the right side seal portion 4. As a result, in the present embodiment, first, the front break line 10a reaches the point P1 on the front opening guide line 20, and advances in the direction of arrow A1 along the front opening guide line 20.

  Next, the back break line 10b reaches the point P2 on the back opening guide line 20, and merges with the front break line 10a that has advanced along the front opening guide line 20. The front break line 10a and the back break line 10b that have joined at the point P2 travel in the direction of the arrow A2 along the front opening guide line and the back opening guide line 20. As a result, both the front break line 10a and the back break line 10b are separated by the front opening guide line and the back opening guide line 20, and the end 20b of the front opening guide line and the back opening guide line 20, that is, the lower edge of the top seal portion 6. It is guided to a point P3 on 6a.

  The front break line 10a and the back break line 10b that have reached the point P3 are all along the lower edge 6a of the top seal portion 6 in the direction of arrow A3, and the lower edge 6a of the top seal portion 6 and the right side seal portion. The point P4 of the corner where the inner edge 4a of the fourth part 4 meets is reached. Therefore, also in the present embodiment, the front break line 10 a and the back break line 10 b are guided to the same point on the inner edge 4 a of the right side seal portion 4 by the front opening guide line and the back opening guide line 20. . Thereby, also in the present embodiment, the right side seal portion 4 can be torn by a small shearing force, and one break line 10c advances from the point P4 along the right side seal portion 4 to easily separate the broken pieces. Can be.

  Note that if the front end line 20b is aligned with the front break line 10a and the back break line 10b along the lower edge 6a of the top seal portion 6 and can be substantially guided to the same point on the inner edge 4a of the right side seal portion 4, The top seal 6 does not need to be located on the lower edge 6a, and may be located near the lower edge 6a of the top seal 6. Here, it is preferable that the terminal end 20b is located within 10 mm from the lower edge 6a in the vicinity of the lower edge 6a. The same applies to other embodiments.

(Fourth embodiment)
Next, a packaging bag according to a fourth embodiment will be described with reference to FIG.
Note that the easy-opening portion 10 of the packaging bag of the present embodiment is provided at a position closer to the top seal portion 6 than that of the first embodiment.

  As shown in FIG. 13, the front opening guide line and the back opening guide line 22 in the packaging bag of the present embodiment obliquely intersect with the opening virtual straight line 12 and extend along the direction from the lower left to the upper right. . Each end 22b of the front opening guide line and the back opening guide line 22 is located on the lower edge 6a of the top seal portion 6, as in the third embodiment. As a result, at the time of opening, the breaking line that proceeds above the opening virtual straight line 12 reliably reaches the front opening guide line and the back opening guide line 22.

  On the other hand, the start end 22a of each of the front opening guide line and the back opening guide line 22 is located on the inner edge 2a of the left side seal portion 2. As a result, at the time of unsealing, the breaking line that proceeds below the opening virtual straight line 12 also reaches the front opening guide line and the back opening guide line 22 without fail. Therefore, in this embodiment, at the time of opening, the front break line and the back break line surely reach the front opening guide line and the back opening guide line 22, respectively.

  At the time of opening, the front break line and the back break line reach the front opening guide line and the back opening guide line 22, respectively, and merge, and reach the terminal end 22b overlapping each other on the lower edge 6a of the top seal portion 6. The front break line and the back break line that have reached the end 22b all proceed along the lower edge 6a of the top seal portion 6, and the corner where the lower edge 6a of the top seal portion 6 and the inner edge 4a of the right side seal portion 4 meet. To reach. As a result, also in the present embodiment, the right side seal portion 4 can be torn by a small shearing force, and one break line advances from the corner to the right side seal portion 4, and the broken pieces can be easily separated. .

(Fifth embodiment)
Next, a packaging bag according to a fifth embodiment will be described with reference to FIG. As shown in FIG. 14, the front opening guide line and the back opening guide line 30 in the packaging bag of the present embodiment obliquely intersect with the opening virtual straight line 12 and extend along the direction from upper left to lower right. I have. Each end 30b of the front opening guide line and the back opening guide line 30 overlaps each other at a position on the inner edge 4a of the right side seal portion 4 below the opening virtual straight line 12 by a predetermined distance L or more. Thereby, at the time of opening, it is possible to increase the probability that a break line that goes below the opening virtual straight line reaches the opening guide line 30.

  Note that the end 30b of the front opening guide line and the back opening guide line 30 may be arranged at a position higher than the upper surface of the contents so that the contents of the packaging bag do not overflow during opening. Generally, in a retort pouch packaging bag, the top surface of the contents is below the opening virtual straight line 12 with the top seal portion 6 of the retort pouch up, and a pair of side It is often located below the opening virtual straight line 12 by a distance within 23% of the length D along the opening virtual straight line 12 between the inner edges 2a, 4a of the seal portions 2, 4. Therefore, also in the present embodiment, when the upper surface of the contents is at a position higher than the position separated by the predetermined distance L below the opening virtual straight line 12, the front opening guide line and the back opening guide line. It is preferable that the end 30b of each of the 30's near the right side seal portion 4 is located below the opening virtual straight line 12 and within a distance of 23% of the length D from the opening virtual straight line 12.

  On the other hand, the starting end 30a of the opening guide line 30 is located above the opening virtual line 12 by a predetermined distance L or more. Thereby, at the time of unsealing, it is possible to increase the probability that the break line that advances above the opening virtual line 12 reaches the unsealing guide line 30.

  At the time of opening, the front break line and the back break line reach the front opening guide line and the back opening guide line 30, respectively, merge, and reach the end 30b overlapping on the inner edge 4a of the right side seal portion 4. As a result, also in the present embodiment, the right side seal portion 4 can be torn by a small shearing force, and one break line from the end 30b of the front opening guide line and the back opening guide line 30 is formed by the right side seal portion 4. The broken pieces can be easily separated.

(Sixth embodiment)
Next, a packaging bag according to a sixth embodiment will be described with reference to FIG.
Note that the easy-opening portion 10 of the packaging bag of the present embodiment is provided at a position closer to the top seal portion 6 than that of the first embodiment.

  As shown in FIG. 15, the front opening guide line and the back opening guide line 32 in the packaging bag of the present embodiment obliquely intersect the opening virtual straight line 12 and extend along the direction from upper left to lower right. I have. Each end 32b of the front opening guide line and the back opening guide line 32 is separated from the imaginary opening straight line 12 on the inner edge 4a of the right side seal portion 4 by a predetermined distance L or more, similarly to the fifth embodiment. Overlap each other in position. Thereby, at the time of opening, it is possible to increase the probability that the break line that goes below the opening virtual straight line 12 reaches the front opening guide line and the back opening guide line 32.

  On the other hand, the start end 32a of each of the front opening guide line and the back opening guide line 32 is located on the lower edge 6a of the top seal portion 6. Thereby, at the time of unsealing, the break line that advances above the opening virtual line 12 can reliably reach the front opening guide line and the back opening guide line 32.

  At the time of opening, the front break line and the back break line respectively reach the front opening guide line and the back opening guide line 32 and merge, and reach the terminal end 32 b on the inner edge 4 a of the right side seal portion 4. As a result, also in the present embodiment, the right side seal portion 4 can be torn by a small shearing force, and one break line is formed from the overlapping end 32b of the front opening guide line and the back opening guide line 32 by the right side seal line. Proceeding through the seal portion 4, the broken pieces can be easily separated.

(Seventh embodiment)
Next, a packaging bag according to a seventh embodiment will be described with reference to FIG.
As shown in FIG. 16, the front opening guide line and the back opening guide line 34 in the packaging bag of the present embodiment obliquely intersect with the opening virtual straight line 12 and extend along the direction from upper left to lower right. I have. Each terminal end 34b of the front opening guide line and the back opening guide line 34 is separated from the imaginary opening straight line 12 on the inner edge 4a of the right side seal portion 4 by a predetermined distance L or more, as in the fifth embodiment. Overlap each other in position. Thereby, at the time of opening, it is possible to increase the probability that the break line that goes below the opening virtual straight line 12 reaches the opening guide line 32.

  On the other hand, the start end 34a of each of the front opening guide line and the back opening guide line 34 is located on the inner edge 2a of the left side seal portion 2. Thereby, at the time of unsealing, the breaking line that advances above the opening virtual straight line 12 can reliably reach the unsealing guide line 34.

  At the time of opening, the front break line and the back break line respectively reach the front opening guide line and the back opening guide line 34 and merge, and reach the terminal end 34 b overlapping each other on the inner edge 4 a of the right side seal portion 4. As a result, also in the present embodiment, the right side seal portion 4 can be torn by a small shearing force, and one break line from the terminal end 34b of the front opening guide line and the back opening guide line 34 causes the right side seal portion 4 to tear. Going forward, the broken pieces can be easily separated.

(Eighth embodiment)
Next, a packaging bag according to an eighth embodiment will be described with reference to FIG.
As shown in FIG. 17, the opening guide line of the present embodiment includes a first opening guide line 38 provided on the front film 1a and the back film 1b, and a side seal portion on the other side of the first opening guide line 38. And a second unsealing guide line 40 arranged at the fourth side. The first opening guide line 38 and the second opening guide line 40 both obliquely intersect the opening virtual straight line 12 and extend along the direction from the lower left to the upper right.

  The start end 38a of the first opening guide line 38 is located below the opening virtual straight line 12 by a predetermined distance L or more, while the end 38b of the first opening guide line 38 is located at the inner edge 4a of the right side seal portion 4. Above, it is located above the opening virtual straight line 12 by a predetermined distance L or more.

  The second opening guide line 40 branches from a point P on the first opening guide line 38 and is arranged so as to move away from the first opening guide line 38 as approaching the left side seal portion 2. The end 40b of the second opening guide line 40 is disposed at a point P on the first opening guide line 38, and the starting end 40a of the second opening guide line 40 is separated from the imaginary opening straight line 12 by a predetermined distance L or more. Is located.

  As described above, since the second opening guide line 40 is provided in addition to the first opening guide line 38, at the time of opening, one or both of the front break line and the back break line that have reached the first opening guide line 38, Even in the case of proceeding across the first opening guide line 38, the break line reaching the second opening guide line 40 is guided to a point P on the first opening guide line 38, and subsequently, the first opening guide The break line can be guided by the line 38 to the terminal end 38 b on the inner edge 4 a of the right side seal portion 4.

(Ninth embodiment)
Next, a packaging bag according to a ninth embodiment will be described with reference to FIG.
As shown in FIG. 18, the opening guide line of the present embodiment includes a first opening guide line 42 provided on each of the front film 1a and the back film 1b, and a side seal other than the first opening guide line 42. And a second unsealing guide line 44 arranged near the portion 4. The first opening guide line 42 and the second opening guide line 44 both obliquely intersect with the opening virtual straight line 12, extend along the direction from the lower left to the upper right, and are mutually separated as approaching the left side seal portion 2. It is arranged to keep away.

  The terminal end 42b of the first opening guide line 42 and the terminal end 44b of the second opening guide line 44 are located on the inner edge 4a of the right side seal portion 4 at a position above the opening virtual straight line 12 by a predetermined distance L or more. They are arranged overlapping. In addition, the starting end 42a of the first opening guide line 42 and the starting end 44a of the second opening guide line 44 are arranged at positions lower than the opening virtual straight line 12 by a predetermined distance L or more.

  As described above, since the second opening guide line 44 is provided in addition to the first opening guide line 42, at the time of opening, one or both of the front break line and the back break line that have reached the first opening guide line 42 are the second break guide line. Even in the case of proceeding across the first opening guide line 42, the break line that has reached the second opening guide line 44 can be guided to the terminal end 44b on the inner edge 4a of the right side seal portion 4.

(Tenth embodiment)
Next, a packaging bag according to a tenth embodiment will be described with reference to FIG.
The opening guide line of the present embodiment includes a first opening guide line 46 and a second opening guide line 48 provided on each of the front film 1a and the back film 1b. The first and second unsealing guide lines 46 and 48 are arranged so as to be opposite to each other with respect to the unfolding imaginary straight line 12 and to move away from each other as approaching the left side seal portion 2.

The terminal end 46b of the first opening guide line 46 and the terminal end 48b of the second opening guide line 48 are arranged on the opening edge straight line 12 on the inner edge 4a of the right side seal portion 4 so as to overlap each other.
Note that the terminal end 46b and the terminal end 48b may be arranged on the inner edge 4a of the right side seal portion 4 at a position apart from the opening virtual straight line 12 so as to overlap each other.

  The start end 46a of the first opening guide line 46 is disposed at a position above the opening virtual straight line 12 by a predetermined distance L or more, while the starting end 48a of the second opening guide line 48 is located Is also disposed at a position separated by a predetermined distance L or more below. Thereby, the possibility that the break line reaches at least one of the first and second opening guide lines 46 and 48 can be increased.

Next, opening of the packaging bag of the present embodiment will be described with reference to FIG. FIG. 20 shows the positions of the front break line 10a and the back break line 10b at the time of opening the package in an unopened state.
At the time of opening, the front break line 10 a and the back break line 10 b extend from the left side seal portion 2 toward the right side seal portion 4. As a result, the front break line 10a reaches the second opening guide line 48, proceeds in the direction of the arrow A1 along the second opening guide line 48, and reaches the terminal end 48b of the second opening guide line 48. On the other hand, the back break line 10b reaches the first opening guide line 46, advances in the direction of arrow A2 along the first opening guide line 46, and reaches the end 46b of the first opening guide line 46.

  Since both the terminal end 46b and the terminal end 48b are arranged so as to overlap the point P on the inner edge 4a of the right side seal portion 4, the front break line 10a and the rear break line 10b merge at the point P. As a result, the right side seal part 4 can be torn with a small shearing force, and one break line 10c can travel along the right side seal part 4 from the point P, and the broken pieces can be easily separated.

(Eleventh embodiment)
Next, a packaging bag according to an eleventh embodiment will be described with reference to FIG.
The opening guide line of the present embodiment includes a first opening guide line 56 provided on each of the front film 1a and the back film 1b, and a second opening guide line 54 branched from the first opening guide line 56. ing. The first opening guide line 56 and the second opening guide line 54 are inclined so as to be opposite to each other with respect to the opening virtual straight line 12, and are arranged so as to move away from each other as approaching the left side seal portion 2.

  The start end 56a of the first opening guide line 56 is arranged at a position lower than the opening virtual line 12 by a predetermined distance L or more, while the starting end 54a of the second opening guide line 54 is located lower than the opening virtual line 12. It is arranged on the upper side at a position separated by a predetermined distance L or more. Thereby, the possibility that the break line reaches at least one of the first opening guide line 56 and the second opening guide line 54 can be increased.

  The end 56b of the first opening guide line 56 is disposed on the inner edge 4a of the right side seal portion 4, while the end 54b of the second opening guide line 54 is located at a point P on the first opening guide line 56. Are located. For this reason, at the time of opening, the break line that has reached the first opening guide line 56 is guided to the terminal end 56 b on the inner edge 4 a of the right side seal portion 4. On the other hand, the break line that has reached the second opening guide line 54 is guided to the terminal end 54 b (that is, the point P on the first opening guide line 56), and subsequently, the first opening guide line 56 causes the right side seal portion 4. To the end 56b on the inner edge 4a of the Thus, also in the present embodiment, both the front and back break lines are guided to one point on the inner edge 4 a of the right side seal portion 4. As a result, the right side seal portion 4 can be torn by a small shearing force, and a single break line advances from the corner through the right side seal portion 4, and the broken pieces can be easily separated.

  The embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. In the above-described embodiment, the example of the opening guide line extending linearly has been described. However, in the present invention, the opening guide line is not limited to a straight line, and may be a curved line or a bent line.

  Further, in the above-described embodiment, an example of a flat pouch packaging bag having a substantially rectangular planar shape and heat-sealed on all sides has been described, but in the present invention, the shape of the packaging bag is not limited to this. For example, the present invention can be applied to a standing pouch, a pouch with a gusset, and a packaging bag in which three sides of a folded film are sealed.

  In addition, the length and width of each of the pair of side seal portions may be the same or different. Further, the pair of side seal portions may be arranged symmetrically with respect to the center line of the packaging bag, or may be arranged asymmetrically. Further, the pair of side seal portions may be arranged parallel to each other or may be arranged non-parallel. For example, when the pair of side seals are not parallel to each other and the packaging bag has a trapezoidal planar shape, the central axis of the trapezoid is a symmetric axis extending in the vertical direction.

  The packaging bag according to the present invention can be applied to various packaging bags used for beverages, medicines and the like, in addition to packaging bags for storing foods such as retort pouches.

1a Front film 1b Back film 1c Broken fragment 2 One side seal part (left side seal part)
2a Inner edge of left side seal part 4 The other side seal part (right side seal part)
4a Inner edge of right side seal portion 6 Top seal portion 6a Lower edge of top seal portion 8 Bottom seal portion 10 Easy opening portion 10a Break line of front film (front break line)
10b Break line of back film (back break line)
10c Breaking line of right side seal portion 11 Symmetry axis 12 Opening imaginary straight line 14, 16, 17, 18, 20, 22, 30, 32, 34, 38, 40, 42, 44, 46, 48, 54, 56 Opening guide Lines 14a, 16a, 17a, 18a, 20a, 22a, 30a, 32a, 34a, 38a, 40a, 42a, 44a, 46a, 48a, 54a, 56a One end near the side seal portion (starting end)
14b, 16b, 17b, 18b, 20b, 22b, 30b, 32b, 34b, 38b, 40b, 42b, 44b, 46b, 48b, 54b, 56b An end (end) near the other side seal portion.
15 Reinforcement 15a Edge of reinforcement

Claims (16)

One of the pair of side seal portions includes a pair of side seal portions for sealing both side edges of the superposed front film and the back film, and a top seal portion for sealing the upper edges of the front film and the back film. A packaging bag having an easy-open portion formed in a side seal portion of
In a region between the pair of side seal portions of the front film and the back film, a front opening guide line provided on the front film, and a back opening guide line provided on the back film,
The front opening guide line and the back opening guide line are inclined with respect to a virtual opening straight line extending in a direction orthogonal to a symmetry axis extending in a longitudinal direction of the packaging bag from the easy opening portion to the other side seal portion. Extend
An end of the front opening guide line near the other side seal portion and an end of the back opening guide line near the other side seal portion are on or near the inner edge of the other side seal portion. Or, overlap each other on the lower edge of the top seal portion or near the lower edge ,
The end of each of the front opening guide line and the back opening guide line near the one side seal portion is located below the opening virtual line, and each of the front opening guide line and the back opening guide line. The end near the other side seal portion is located above the opening virtual straight line,
Or
Ends of the front opening guide line and the back opening guide line near the other side seal portion overlap with each other on or near the inner edge of the other side seal portion, and the front opening guide line and the back surface. The end of each of the opening guide lines closer to the one side seal portion is located above the virtual opening straight line, and each of the front opening guide line and the back opening guide line is closer to the other side seal portion. The packaging bag , wherein the end is located below the opening virtual straight line . End of the table opening guide wire and back opening guide line each of the one side seal portion side of the is characterized by being located on the lower edge of the top seal portion, the packaging of claim 1, wherein bag. An end of each of the front opening guide line and the back opening guide line near the other side seal portion is a distance of 28% or more of a length along the opening virtual straight line between inner edges of the pair of side seal portions. characterized in that only situated away from the opening imaginary straight line, according to claim 1 or 2 packaging bag according. An end of each of the front opening guide line and the back opening guide line near the other side seal portion is a distance of 38% or more of a length along the opening virtual line between the inner edges of the pair of side seal portions. characterized in that only situated away from the opening imaginary straight line, according to claim 1 or 2 packaging bag according. An end of each of the front opening guide line and the back opening guide line near the other side seal portion is below the opening virtual straight line, and an inner edge of the pair of side seal portions is located from the opening virtual straight line. The packaging bag according to claim 1 , wherein the packaging bag is located at a distance within 23% of a length along the opening virtual straight line therebetween. End of the table opening guide wire and back opening guide line each of the one side seal portion side of the is characterized by being located on the inner edge of the one side seal portion, claim 1-5 The packaging bag according to any one of the above. An end of each of the front opening guide line and the back opening guide line near the one side seal portion is a distance of 28% or more of a length along the imaginary opening straight line between inner edges of the pair of side seal portions. The packaging bag according to any one of claims 1 to 6 , wherein the packaging bag is positioned apart from the opening virtual straight line only. An end of each of the front opening guide line and the back opening guide line near the one side seal portion is a distance of 38% or more of a length along the imaginary opening straight line between inner edges of the pair of side seal portions. The packaging bag according to any one of claims 1 to 6 , wherein the packaging bag is positioned apart from the opening virtual straight line only. The packaging bag according to any one of claims 1 to 8 , wherein an inclination angle of an extension direction of the opening guide line with respect to the opening virtual straight line is 10 ° to 50 °. Table opening guide wire and back opening guide wire is characterized by being composed by an edge of the reinforcing portion is not easily broken than the table film and backing film, according to any one of claims 1-9 Packaging bag. The package according to any one of claims 1 to 10 , wherein the front opening guide line and the back opening guide line are configured by a weakened portion that is more easily broken than the front film and the back film. bag. One of the pair of side seal portions includes a pair of side seal portions for sealing both side edges of the superposed front film and the back film, and a top seal portion for sealing the upper edges of the front film and the back film. A packaging bag having an easy-open portion formed in a side seal portion of
In a region between the pair of side seal portions of the front film and the back film, a front opening guide line provided on the front film, and a back opening guide line provided on the back film,
The front opening guide line and the back opening guide line are inclined with respect to a virtual opening straight line extending in a direction orthogonal to a symmetry axis extending in a longitudinal direction of the packaging bag from the easy opening portion to the other side seal portion. Extend
An end of the front opening guide line near the other side seal portion and an end of the back opening guide line near the other side seal portion are on or near the inner edge of the other side seal portion. Or, overlap each other on the lower edge of the top seal portion or near the lower edge,
An end of each of the front opening guide line and the back opening guide line near the one side seal portion is located on a lower edge of the top seal portion.
A packaging bag, characterized in that: One of the pair of side seal portions includes a pair of side seal portions for sealing both side edges of the superposed front film and the back film, and a top seal portion for sealing the upper edges of the front film and the back film. A packaging bag having an easy-open portion formed in a side seal portion of
In a region between the pair of side seal portions of the front film and the back film, a front opening guide line provided on the front film, and a back opening guide line provided on the back film,
The front opening guide line and the back opening guide line are inclined with respect to a virtual opening straight line extending in a direction orthogonal to a symmetry axis extending in a longitudinal direction of the packaging bag from the easy opening portion to the other side seal portion. Extend
An end of the front opening guide line near the other side seal portion and an end of the back opening guide line near the other side seal portion are on or near the inner edge of the other side seal portion. Or, overlap each other on the lower edge of the top seal portion or near the lower edge,
An end of each of the front opening guide line and the back opening guide line near the other side seal portion is a distance of 28% or more of a length along the opening virtual straight line between inner edges of the pair of side seal portions. Only located away from the opening virtual straight line
A packaging bag, characterized in that: One of the pair of side seal portions includes a pair of side seal portions for sealing both side edges of the superposed front film and the back film, and a top seal portion for sealing the upper edges of the front film and the back film. A packaging bag having an easy-open portion formed in a side seal portion of
In a region between the pair of side seal portions of the front film and the back film, a front opening guide line provided on the front film, and a back opening guide line provided on the back film,
The front opening guide line and the back opening guide line are inclined with respect to a virtual opening straight line extending in a direction orthogonal to a symmetry axis extending in a longitudinal direction of the packaging bag from the easy opening portion to the other side seal portion. Extend
An end of the front opening guide line near the other side seal portion and an end of the back opening guide line near the other side seal portion are on or near the inner edge of the other side seal portion. Or, overlap each other on the lower edge of the top seal portion or near the lower edge,
An end of each of the front opening guide line and the back opening guide line near the one side seal portion is located on an inner edge of the one side seal portion.
An end of each of the front opening guide line and the back opening guide line near the other side seal portion is a distance of 38% or more of a length along the opening virtual line between the inner edges of the pair of side seal portions. Only located away from the opening virtual straight line
A packaging bag, characterized in that: One of the pair of side seal portions includes a pair of side seal portions for sealing both side edges of the superposed front film and the back film, and a top seal portion for sealing the upper edges of the front film and the back film. A packaging bag having an easy-open portion formed in a side seal portion of
In a region between the pair of side seal portions of the front film and the back film, a front opening guide line provided on the front film, and a back opening guide line provided on the back film,
The front opening guide line and the back opening guide line are inclined with respect to a virtual opening straight line extending in a direction orthogonal to a symmetry axis extending in a longitudinal direction of the packaging bag from the easy opening portion to the other side seal portion. Extend
An end of the front opening guide line near the other side seal portion and an end of the back opening guide line near the other side seal portion are on or near the inner edge of the other side seal portion. Or, overlap each other on the lower edge of the top seal portion or near the lower edge,
An end of each of the front opening guide line and the back opening guide line near the other side seal portion is below the opening virtual straight line, and an inner edge of the pair of side seal portions is located from the opening virtual straight line. Between 23% and 23% of the length along the opening virtual straight line
A packaging bag, characterized in that: One of the pair of side seal portions includes a pair of side seal portions for sealing both side edges of the superposed front film and the back film, and a top seal portion for sealing the upper edges of the front film and the back film. A packaging bag having an easy-open portion formed in a side seal portion of
In a region between the pair of side seal portions of the front film and the back film, a front opening guide line provided on the front film, and a back opening guide line provided on the back film,
The front opening guide line and the back opening guide line are inclined with respect to a virtual opening straight line extending in a direction orthogonal to a symmetry axis extending in a longitudinal direction of the packaging bag from the easy opening portion to the other side seal portion. Extend
An end of the front opening guide line near the other side seal portion and an end of the back opening guide line near the other side seal portion are on or near the inner edge of the other side seal portion. Or, overlap each other on the lower edge of the top seal portion or near the lower edge,
An end of each of the front opening guide line and the back opening guide line near the one side seal portion is located on an inner edge of the one side seal portion.
A packaging bag, characterized in that:

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