JP2016155575A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag capable of smoothly opening a package while maintaining a sufficiently high level of a function of sealing an object to be packaged. SOLUTION: A packaging bag 10 has a sealing portion 11 formed by laminating the peripheral edges of laminated films 12 and 13 and an accommodating portion 18 for enclosing an object to be packaged in a non-sealing portion 15 inside the sealing portion 11. An opening means for opening the accommodating portion 18 by cutting the ends 14 and 14 so as to traverse between the ends 14 and 14 is provided. The opening means 20 is provided along the direction in which the scar groups 24 and 24 face the non-seal portions 15 between the scar groups 24 and 24 provided on the seal portions 11 of the side end portions 14 and 14 and the scar groups 24 and 24. It has a plurality of half-cut lines 26a, 26b, 26c, 26d, 26e extending in parallel. The pair of half-cut lines 26a and 26e are formed so as to sandwich a region between the virtual lines connecting the upper ends and the lower ends of the scar groups 24 and 24, respectively. [Selection diagram] Fig. 1

Description

  The present invention relates to a packaging bag.

  2. Description of the Related Art A packaging bag that seals and preserves a packaged item such as food is known. The packaging bag is devised to facilitate opening by providing a notch or the like at the side end. In addition, there is a packaging bag in which resealing means such as a synthetic resin fastener is attached in the vicinity of the opening so that resealing is possible even after opening. By providing such re-sealing means on the packaging bag, the packaged item can be repeatedly sealed and stored even when the packaged item is not consumed all at once and is consumed several times. .

  The packaging bag as described above is formed by laminating the peripheral portions of a pair of laminated films in which a plurality of films of different materials are laminated. As a means for opening such a packaging bag, one that cuts a laminated film along a score line formed on a surface portion of the laminated film is known by using a group of scars provided in a seal portion at a side end. . Patent Document 1 proposes a technique for providing a guide means that tapers toward the cut line in such a packaging bag so that the bag can be torn along the cut line.

Japanese Patent No. 4686075

  By adopting a scar group instead of the V-shaped notch and the U-shaped notch as the opening means, the area where the opening can be started can be enlarged. By increasing the formation area of the scar group, there is an advantage that the slit opening can be easily started without checking the start position of the slit opening each time. In addition, the scar group has an advantage in that it does not smash at the time of manufacture compared to the V-shaped notch and the U-shaped notch. In order to enjoy such an advantage, the chance that a scar group is adopted as an opening means is increasing.

  On the other hand, when the formation area of the scar group is increased in order to enjoy the above-described advantages, the start position of the slit opening is likely to vary, and the slit opening is likely to shift in an unexpected direction. As a means for avoiding such a phenomenon, as described in Patent Document 1, it is conceivable to provide a guide line that penetrates the packaging bag in the vicinity of the scar group. However, in the vicinity of the scar group, the strength is originally low, and if such a guide wire is provided, the strength is further reduced. For this reason, at the time of transportation, etc., there is a concern that the unfolding progresses and the packaging bag is unsealed. Moreover, when opening a packaging bag intentionally, when a cut is guided to a linear half cut line by a guide line, it is necessary to bend the direction of the cut. For this reason, in the technique like patent document 1, the case where a slitting does not advance smoothly is assumed.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a packaging bag that can be smoothly opened and opened while maintaining a sufficiently high level of function for sealing an object to be packaged. .

  The present invention crosses between a seal part formed by laminating the peripheral edges of a pair of laminated films, an accommodating part that encloses an article to be packaged in a non-seal part inside the seal part, a pair of side end parts, and a space therebetween. An opening means for cutting the opening portion to open the housing portion, wherein the opening means is a pair of scar groups provided in the seal portion at the pair of side end portions and a non-between the pair of scar groups. A plurality of half-cut lines extending in parallel along a direction in which the pair of scars face each other on the seal portion, and a pair of halves arranged on the outermost side among the plurality of half-cut lines The cut line provides a packaging bag that is formed so as to sandwich a region between virtual lines that respectively connect the upper ends and the lower ends of the pair of scar groups along the half cut line.

  Since the opening means has a scar group, the packaging bag of the present invention can be easily opened. The unsealing means has a plurality of half-cut lines extending in parallel along the direction in which the pair of scar groups face each other along with the scar group. Of the plurality of half-cut lines, the pair of outermost half-cut lines is formed so as to sandwich an area between the virtual lines. For this reason, it can suppress that the direction of a slit opens and deviates from between a pair of half cut lines, even if a slit opens from any position of a scar group. In other words, even when a scar group in which the starting position of the slitting is likely to vary is employed, the progress of the slitting can be smoothly guided on the pair of half-cut lines or on the half-cut line between them. Therefore, the packaging bag of the present invention can be smoothly opened.

  The unsealing means can be composed of a scar group and a half-cut line group. For this reason, since it is not necessary to form the guide wire which penetrates, progress of the unintentional opening can be suppressed at the time of transportation. Therefore, the function of sealing the packaged object can be maintained at a sufficiently high level.

  In some embodiments of the packaging bag of the present invention, the plurality of half-cut lines described above may be formed so as to cross the non-seal part and extend to the seal part of the pair of side end parts. Good. Thereby, the transition of the slit opening from the scar group to the half cut line can be further smoothed.

  In some embodiments, the packaging bag of the present invention may be formed such that the plurality of half-cut lines described above reach the outer edges of the pair of side end portions. Thereby, the start of the slitting can be made smoother. Moreover, it can suppress more reliably that a notch progresses in the direction which was not assumed. Furthermore, in the manufacture of packaging bags, it is possible to form half cut lines at a time for a plurality of packaging bags before dividing the plurality of packaging bags individually. Therefore, manufacturing efficiency can be improved.

  In some embodiments of the packaging bag of the present invention, the pair of half-cut lines arranged on the outermost side reach the outer edges of the pair of side end portions, and both ends of the half-cut lines other than the pair of half-cut lines are , And may be located at the seal portion of the pair of side end portions. As a result, the strength of the side end portion is increased as compared with the case where all the half-cut lines are formed up to the outer edge of the side end portion while sufficiently suppressing the progress of the slit opening in an unexpected direction. Can do. Accordingly, it is possible to sufficiently suppress the progress of unintended slitting during transportation and to sufficiently enhance the function of sealing the package.

  In some embodiments of the packaging bag of the present invention, both ends of at least one of the plurality of half-cut lines may be located in a non-seal portion near the seal portion. Thereby, for example, even a packaging bag formed using a laminated film having a relatively low strength can sufficiently suppress an unintended cut opening and opening. Therefore, the function of sealing the packaged item can be further improved.

  In some embodiments of the packaging bag of the present invention, a plurality of half-cut lines may be formed in the region. Accordingly, the slitting can be sufficiently smoothly advanced regardless of the starting position of the slitting. That is, the variation in smoothness of the slitting can be sufficiently reduced.

  In some embodiments of the packaging bag of the present invention, a plurality of half-cut lines formed on one laminated film are linear, and a plurality of half-cut lines formed on the other laminated film are not sealed. You may form so that it may swell to the upper end or lower end side in the center part of a part. This makes it possible to improve the workability of opening by changing the trajectory of the opening in one laminated film and the other laminated film.

  The packaging bag of this invention may be provided with the resealing means which reseals the accommodating part after opening by the opening means on the accommodating part side rather than the opening means. Thereby, opening and resealing of a storage part can be performed repeatedly. Such an embodiment is particularly useful when the items to be packaged are not consumed at once.

  ADVANTAGE OF THE INVENTION According to this invention, the packaging bag which can perform a slitting smoothly can be provided, maintaining the function which seals a to-be-packaged item at a sufficiently high level.

It is a top view showing typically a 1st embodiment of a packaging bag of the present invention. It is a top view when the packaging bag shown in FIG. 1 is seen from the back surface. It is a schematic cross section which expands and shows a part of cross section of the laminated film which comprises the packaging bag of FIG. It is a fragmentary top view which expands and shows a part of opening means of the packaging bag of FIG. It is a fragmentary top view which expands and shows a part of opening means in 2nd Embodiment of the packaging bag of this invention. It is a fragmentary top view which expands and shows a part of opening means in 3rd Embodiment of the packaging bag of this invention. It is a fragmentary top view which expands and shows a part of opening means in 4th Embodiment of the packaging bag of this invention. It is a fragmentary top view which expands and shows a part of opening means in 5th Embodiment of the packaging bag of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. However, the following embodiments are examples for explaining the present invention, and are not intended to limit the present invention to the following contents. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted in some cases. Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified. Further, the dimensional ratios in the drawings are not limited to the illustrated ratios.

  FIG. 1 is a plan view schematically showing the surface side of one embodiment (first embodiment) of the packaging bag of the present invention. FIG. 2 is a plan view schematically showing the back side of the packaging bag. The packaging bag 10 includes a seal portion 11 formed by bonding the peripheral edges of a pair of substantially rectangular laminated films 12 and 13, and a storage portion 18 formed between the pair of laminated films 12 and 13 by the seal portion 11. . That is, the side end portion 14, the lower end portion 16, and the upper end portion 17 of the packaging bag 10 are sealed by the seal portion 11.

  The packaging bag 10 includes an accommodation portion 18 in which an article to be packaged such as a food product is accommodated in a non-sealing portion (sheet portion) 15 surrounded by the sealing portion 11. The container 18 encloses an object to be packaged such as food. In addition, you may seal the seal | sticker part 11 of the lower end part 16, after filling the to-be-packaged object in the accommodating part 18. FIG.

  The laminated films 12 and 13 are configured by laminating two or more film-like films. Examples of the laminated films 12 and 13 include those having a laminated structure of sealant layer / intermediate layer / base material layer from the inside.

  FIG. 3 is a schematic cross-sectional view showing a part of the cross section of the laminated film 12 (13) in an enlarged manner. The laminated film 12 (13) has a laminated structure in which the sealant layer 40, the intermediate layer 50, and the base material layer 60 are laminated in this order from the inner side (the accommodating portion 18 side). Examples of the sealant layer 40 include a film-like polyolefin resin. More specifically, low density polyethylene resin, medium density polyethylene resin, linear low density polyethylene resin; ethylene-vinyl acetate copolymer, ethylene-α olefin copolymer, ethylene-methacrylic acid resin copolymer, etc. Ethylene resin; blend resin of polyethylene and polybutene; polypropylene resin such as homopolypropylene resin, propylene-ethylene random copolymer, propylene-ethylene block copolymer, propylene-α-olefin copolymer, and the like. The sealant layer 40 may be formed of one of the above-described resins alone or in combination of two or more.

  Examples of the intermediate layer 50 include various barrier films and aluminum foil. Examples of the barrier film include: a polyvinylidene chloride film, a polyvinyl alcohol film, an ethylene vinyl alcohol copolymer film, a gas barrier nylon film, a gas barrier polyethylene terephthalate (PET) film and the like; a PET film and the like such as aluminum Metal vapor deposition film obtained by vapor-depositing an inorganic oxide vapor deposition film obtained by vapor-depositing an inorganic oxide such as aluminum oxide or silicon oxide on a PET film. One of the above-described films may be used alone or in combination of two or more.

  Examples of the base material layer 60 include biaxially stretched films such as a biaxially stretched polyethylene terephthalate (PET) film, a biaxially stretched polypropylene (PP) film, and a biaxially stretched nylon film. One of the above-described films may be used alone or in combination of two or more. The laminated structure of the laminated films 12 and 13 is not limited to the embodiment shown in FIG. 3, and layers of various materials can be used depending on the type of the packaged object and the required airtightness level.

  As shown in FIG. 1, the packaging bag 10 has an opening means 20 for opening and opening the side ends 14, 14 of the packaging bag 10 so as to cross between them, and an opening on the lower side of the opening means 20. And a resealing means 30 for resealing the container 18 after being opened by the means 20.

  The resealing means 30 can appropriately adopt a known structure that can be repeatedly opened and sealed. For example, it may be a synthetic resin fastener that can be repeatedly sealed by fitting a belt-like protrusion and a belt-like groove, or may be an adhesive seal.

  As shown in FIG. 1, the opening means 20 has scar groups 24 and 24 on the seal portion 11 of the pair of side end portions 14 and 14. The scar group 24, 24 is composed of a plurality of through holes. The plurality of through holes may be arranged in a zigzag manner in the seal portion 11, arranged in a row in the horizontal direction, and arranged in a row in the vertical direction in each row.

  A plurality of parallel half-cut lines 26a, 26b, 26c, 26d, and 26e (hereinafter collectively referred to as “half-cut lines 26a to 26e”) may be provided in the non-seal portion 15 between the pair of scar groups 24 and 24. )) Is formed. The half cut lines 26 a to 26 e extend along the direction in which the pair of scar groups 24 and 24 face each other, that is, along the cutting direction by the opening means 20. The plurality of half-cut lines 26a to 26e are formed in parallel to each other. Note that “parallel” in this specification is not limited to being strictly parallel as long as a plurality of straight lines extend in parallel, and the functions of the half-cut lines 26a to 26e are not significantly impaired. They may be substantially parallel.

  The plurality of half-cut lines 26a to 26e are linear grooves (cuts) extending in parallel with each other. For example, as shown in FIG. 3, the base material layer 60 on the surfaces of the laminated films 12 and 13 is notched. The plurality of half-cut lines 26a to 26e can be formed using, for example, a die cutter or laser light.

  As shown in FIGS. 1 and 2, the half-cut line group 26 formed on one laminated film 12 and the half-cut line group 26 ′ formed on the other laminated film 13 have different shapes. May be. That is, the five half cut lines 26a to 26e in the half cut line group 26 are formed in a straight line. On the other hand, the five half-cut lines 26a ′, 26b ′, 26c ′, 26d ′, and 26e ′ in the half-cut line group 26 ′ (hereinafter sometimes collectively referred to as “half-cut lines 26a ′ to 26e ′”). Is curved so as to protrude toward the lower end portion 16 in the center portion from the end portion of the non-seal portion 15.

  As described above, when the half-cut line groups 26 and 26 ′ formed on the laminated films 12 and 13 are formed in different shapes, when the packaging bag 10 is opened by the opening means 20, the laminated film 12 and the laminated film 13 are separated. The path of slitting can be shifted. The inner surfaces of one of the laminated films are exposed at the cut end of the packaging bag 10 by shifting the cut-off paths of the laminated films 12 and 13 facing each other. Thereby, the upper end of the laminated film whose inner surface is exposed can be easily grasped. Therefore, the packaging bag 10 can be easily opened and resumed.

  The half cut line groups 26 and 26 ′ have a symmetrical shape with respect to the center line that vertically cuts the packaging bag 10, from the viewpoint of achieving the same sharpness regardless of whether the scar group 24 on either side is cut. preferable. The shapes of the half-cut lines 26a 'to 26e' may be a parabolic shape or a curved shape such as an arc shape as shown in FIG. 2, or may be a linear shape. That is, the shape of the half cut line group formed in the laminated films 12 and 13 may be the same or different.

  There is no limitation on the lengths of the half-cut lines 26a to 26e and the half-cut lines 26a 'to 26e'. From the viewpoint of further smoothing the opening by the opening means 20, when the width of the packaging bag 10 is L, the lengths of the half-cut lines 26a to 26e and the half-cut lines 26a 'to 26e' are preferably 0.8L or more. More preferably, it is 0.9 L or more.

  FIG. 4 is an enlarged partial plan view showing a part of the opening means 20 of the packaging bag 10. FIG. 4 shows only the upper left end of the packaging bag 10, but the right upper end of the packaging bag 10 has the same configuration. The five half-cut lines 26 a to 26 e are arranged in parallel with the upper edge of the packaging bag 10 and the resealing means 30 at substantially the same interval.

  Of the five half-cut lines 26a to 26e, the pair of half-cut lines 26a and 26e arranged on the outermost side are the scar groups 24 and 24 arranged opposite to the seal parts 11 and 11 of the side end parts 14 and 14, respectively. Are formed outside the virtual line P1 that connects the upper ends of the two and the virtual line P2 that connects the lower ends of the scar groups 24 and 24. That is, among the half-cut lines 26a to 26e, the half-cut line 26a positioned closest to the upper end 17 is formed closer to the upper end 17 than the virtual line P1 connecting the upper ends of the scar groups 24 and 24. . Of the half-cut lines 26a to 26e, the half-cut line 26e located closest to the lower end portion 16 side is closer to the resealing means 30 side (lower end portion 16 side) than the virtual line P2 connecting the lower ends of the scar groups 24 and 24. ). Due to this positional relationship, the half cut line 26a and the half cut line 26e are formed so as to sandwich the region R between the virtual lines P1 and P2. Note that the region R does not include the virtual lines P1 and P2.

  The unsealing means 20 has the half-cut line group 26 having the above-described configuration together with the scar groups 24 and 24, thereby preventing the slit opening started from the scar group 24 from coming outside the half-cut line group 26. be able to. For example, even if the slitting progresses upward from the vicinity of the upper end of the scar group 24, the slitting then merges with the half-cut line 26a and progresses along the half-cut line 26a.

  On the other hand, even if the slit opening proceeds downward from the vicinity of the lower end of the scar group 24, the slit subsequently joins the half cut line 26e and proceeds along the half cut line 26e. Further, when the cut-opening progresses from the vicinity of the center of one scar group 24 toward the other scar group 24, the half-cut lines 26b, 26c, 26d formed in the region R between the virtual lines P1, P2 A slitting progresses along either. Therefore, the packaging bag 10 can be smoothly opened by the opening means 20. At least one of the half-cut lines 26b, 26c, and 26d may be formed outside the region R between the virtual lines P1 and P2.

  The half cut line 26a may be formed on the virtual line P1. The half cut line 26e may be formed on the virtual line P2. Even in these cases, the packaging bag 10 can be smoothly opened. The virtual lines P1 and P2 are lines (virtual straight lines) drawn along the pair of half-cut lines 26a and 26e, and are parallel to the pair of half-cut lines 26a and 26e. Therefore, the virtual lines P1 and P2 in the laminated film 12 are linear. On the other hand, the virtual line (virtual curve) in the laminated film 13 is curved so as to protrude toward the lower end part 16 at the center part from the end part of the non-seal part 15, similarly to the pair of half-cut lines 26 a ′ and 26 e ′. To do.

  The pair of half-cut lines 26 a and 26 e are formed so as to reach the outer edge of the side end portion 14. As a result, the half-cut lines 26 a and 26 e sandwich the scar group 24. For this reason, the half-cut line group 26 can further reliably prevent the slit opening from progressing toward the outside of the half-cut line group 26.

  Half-cut lines 26b, 26c, and 26d formed between the pair of half-cut lines 26a and 26e are shorter than the pair of half-cut lines 26a and 26e. One ends E1, E2, and E3 of the half-cut lines 26b, 26c, and 26d are located in the seal portion 11 at the side end portion 14. Note that the other ends of the half-cut lines 26b, 26c, and 26d (not shown) are also located in the seal portion 11 at the side end portion 14. The half cut line group 26 having such a configuration can increase the strength of the side end portion 14 as compared to the case where all the half cut lines are formed up to the outer edge of the side end portion 14. Therefore, it is possible to sufficiently prevent the unintentional slitting from progressing during transportation and maintain the function of sealing the packaged item at a sufficiently high level.

  By arranging one end E1, E2, E3 of the half-cut lines 26b, 26c, 26d on the seal portion 11 at the side end portion 14, the distance between the one end E1, E2, E3 and the scar group 24 can be reduced. it can. Thereby, the slit opening starting from the scar group 24 can be easily made to reach any one of the one end E1, the one end E2, or the one end E3. The distance between the one end E1, E2, E3 and the scar group 24 is, for example, 0.01L to 0.1L from the viewpoint of further smoothing the progress of the opening.

  FIG. 5 is an enlarged partial plan view showing a part of the opening means 20a in the second embodiment of the packaging bag of the present invention. The packaging bag 10a is different from the packaging bag 10 of the first embodiment described above in the shape of the half-cut line group 26A in the opening means 20a. Other configurations of the packaging bag 10 a are the same as those of the packaging bag 10. Although only one upper end side is shown in FIG. 5, the other upper end side also has the same configuration.

  In the packaging bag 10a, the half cut lines 26f, 26g, and 26h formed in the region R between the virtual line P1 and the virtual line P2 in the half cut line group 26A are paired with the pair of half cut lines 26a and 26e. Similarly, it is formed so as to reach the outer edge of the side end portion 14. Thereby, the half-cut lines 26f, 26g, and 26h can be brought close to or coincident with the scar group 24. By having such a half-cut line group 26A, the opening of the packaging bag 10a can be started more easily. In addition, it is possible to sufficiently suppress the meandering path of the slit from the beginning of the slit. As a result, the initial slitting can proceed more smoothly.

  FIG. 6 is an enlarged partial plan view showing a part of the opening means 20b of the packaging bag 10b according to another embodiment (third embodiment) of the packaging bag of the present invention. The packaging bag 10b is different from the packaging bag 10 of the first embodiment described above in the shape of the half-cut line group 26B in the opening means 20b. Other configurations of the packaging bag 10 b are the same as those of the packaging bag 10. Although only one upper end side is shown in FIG. 6, the other upper end side also has the same configuration.

  In the packaging bag 10b, the half cut lines 26i, 26j, and 26k formed in the region R between the virtual line P1 and the virtual line P2 in the half cut line group 26B are from the pair of half cut lines 26a and 26e. Also short. One ends E4, E5, and E6 of the half-cut lines 26i, 26j, and 26k are located in the non-seal portion 15 near the seal portion 11 at the side end portion 14. The half cut line group 26 </ b> B having such a configuration can increase the strength of the side end portion 14 compared to the case where the half cut line is formed up to the seal portion 11 or the outer edge of the side end portion 14. . Accordingly, it is possible to further prevent the unintended slitting from progressing during transportation and to maintain the function of sealing the packaged item at a higher level.

  In the packaging bag 10b, in the region R, the direction of the cut progresses without being guided by the half cut line until the cut started from the scar group 24 reaches the half cut line group 26B. For this reason, even if the direction (longitudinal direction) in which the half-cut lines 26a, 26i, 26j, 26k, and 26e extend greatly differs from the direction of the slit, the slit is smoothly opened until the slit reaches the half-cut line group 26B. Can proceed to. Such an action is particularly effectively exhibited when, for example, the laminated films 12 and 13 are oriented obliquely. When the slit reaches the half-cut line group 26B, the slit already has a sufficiently large size. Therefore, even if the longitudinal direction of the half-cut lines 26a, 26i, 26j, 26k, and 26e is different from the direction of the cut-opening, the cut-opening is smoothly guided to the half-cut lines 26a, 26i, 26j, 26k, and 26e and proceeds. . The distance between the one end E4, E5, E6 and the scar group 24 is, for example, 0.05 L to 0.1 L from the viewpoint of sufficiently smoothing the progress of the slit opening.

  FIG. 7 is an enlarged partial plan view showing a part of the opening means 20c of the packaging bag 10c according to another embodiment (fourth embodiment) of the packaging bag of the present invention. The packaging bag 10c is different from the packaging bag 10 of the first embodiment described above in the shape of the half-cut line group 26C in the opening means 20c. Other configurations of the packaging bag 10 c are the same as those of the packaging bag 10. FIG. 7 shows only one upper end side, but the other upper end side also has the same configuration.

  In the packaging bag 10c, a pair of half-cut lines 26l and 26m provided so as to sandwich the region R between the virtual line P1 and the virtual line P2 in the half-cut line group 26C is formed in the region R. It has the same length as the cut lines 26b, 26c, 26d. One ends E7 and E8 of the pair of half-cut lines 26l and 26m are located in the seal portion 11 of the side end portion 14. The half cut line group 26 </ b> C having such a configuration can increase the strength of the side end portion 14 as compared with the case where the half cut line extends to the outer edge of the side end portion 14. Accordingly, it is possible to further prevent the unintended slitting from progressing during transportation and to maintain the function of sealing the packaged item at a higher level.

  FIG. 8 is an enlarged partial plan view showing a part of the opening means 20d of the packaging bag 10d according to another embodiment (fifth embodiment) of the packaging bag of the present invention. The packaging bag 10d is different from the packaging bag 10b of the third embodiment described above in the shape of the half-cut line group 26D in the opening means 20d. Other configurations of the packaging bag 10d are the same as those of the packaging bag 10b. Although only one upper end side is shown in FIG. 8, the other upper end side also has the same configuration.

  In the packaging bag 10d, a pair of half-cut lines 26n, 26p provided so as to sandwich the region R between the virtual line P1 and the virtual line P2 in the half-cut line group 26D is formed in the region R. It has the same length as the cut lines 26i, 26j, 26k. One ends E9 and E10 of the pair of half-cut lines 26l and 26m are located in the non-seal portion 15 in the vicinity of the seal portion 11 of the side end portion 14. The half cut line group 26 </ b> D having such a configuration can increase the strength of the side end portion 14 as compared with the case where the half cut line extends to the seal portion 11 of the side end portion 14. Accordingly, it is possible to further prevent the unintended slitting from progressing during transportation and to maintain the function of sealing the packaged item at a higher level.

  In the packaging bag 10d, the direction of the slit progresses without being guided by the half-cut line in the region R until the slit started from the scar group 24 reaches the half-cut line group 26D. Therefore, even if the direction in which the half-cut lines 26n, 26i, 26j, 26k, and 26p extend (longitudinal direction) and the direction of the slit are greatly different, the slit is smoothly opened until the slit reaches the half-cut line group 26D. Can proceed to. Such an action is particularly effectively exhibited when, for example, the laminated films 12 and 13 are oriented obliquely. When the slit reaches the half-cut line group 26D, the slit already has a sufficiently large size. For this reason, even if the longitudinal direction of the half-cut lines 26n, 26i, 26j, 26k, and 26p is different from the direction of the cut-opening, the cut-opening is smoothly guided to the half-cut lines 26n, 26i, 26j, 26k, and 26p and proceeds. .

  The packaging bags 10, 10a, 10b, 10c, and 10d shown in FIGS. 1 to 8 can be manufactured by the following procedure, for example. First, the intermediate layer 50 and the sealant layer 40 are bonded to the base film to be the base layer 60. The sealant layers 40 of the laminated films 12 and 13 are opposed to each other, and the sealant layers 40 are bonded together in a state where, for example, a fastener tape serving as the resealing means 30 is sandwiched, and the upper end portion 17 and the side end portions 14 and 14 are bonded. The seal part 11 is formed at a corresponding position. Thereby, the non-seal part 15 surrounded by the U-shaped seal part 11 is formed. The cut portion 24 is formed after cutting the seal portion 11 and cutting the seal portion 11 into individual bags. The scar group 24 may be formed before cutting the seal portion 11.

  The article to be packaged is filled from the lower end 16 in an unsealed state. Thereafter, the laminated films 12 and 13 are bonded at the lower end portion 16 to form the seal portion 11 also at the lower end portion 16. In this way, the packaging bags 10, 10a, 10b, 10c, 10d can be manufactured. The half-cut line can be formed before slitting the pair of laminated films 12 and 13 bonded together to a predetermined width. Thereby, a half cut line can be efficiently formed in the laminated films 12 and 13 before being slit using a laser beam. The formation of the seal portion 11 and the formation of the half cut line by the laser beam may be performed simultaneously. However, the order of each process is not limited to the above example, and the half cut lines may be formed after the laminated films 12 and 13 are slit to a predetermined width.

  The shape of the packaging bags 10, 10 a, 10 b, 10 c, and 10 d is not limited to a four-sided bag, but may be a three-side sealed bag or a standing pouch shape to which a bottom tape is added.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments. For example, the number of half-cut lines in the half-cut line groups 26, 26A, 26B, 26C, and 26D is not particularly limited, and may be about 3 to 8, for example. The number of half-cut lines formed in the region R is not limited to three, and may be two or four or more. The half cut lines provided so as to sandwich the region R between the virtual lines P1 and P2 are not limited to a pair, and two or more pairs of half cut lines may be formed. Half-cut lines other than the half-cut line groups 26, 26A, 26B, 26C, and 26D may be formed on the laminated films 12 and 13.

  It is possible to provide a packaging bag that can be smoothly opened and cut while maintaining the function of sealing the packaged item at a sufficiently high level.

  DESCRIPTION OF SYMBOLS 10,10a, 10b, 10c, 10d ... Packaging bag, 11 ... Sealing part, 12, 13 ... Laminated film, 14 ... Side edge part, 15 ... Non-sealing part, 16 ... Lower end part, 17 ... Upper end part, 18 ... Accommodating Part, 20, 20a, 20b, 20c, 20d ... opening means, 26, 26A, 26B, 26C, 26D ... half-cut line group, 26a, 26b, 26c, 26d, 26e, 26f, 26g, 26h, 26i, 26j, 26k, 26l, 26m, 26n, 26p ... half cut line, 30 ... resealing means.

Claims (8)

A pair of laminated films, a seal part that is bonded together, a container part that encloses an article to be packaged in a non-seal part inside the seal part, a pair of side end parts, and a cut between them. An opening means for opening the container, and a packaging bag comprising:
The opening means is
A pair of scars provided on the seal portion of the pair of side end portions;
A plurality of half-cut lines extending in parallel along the direction in which the pair of scar groups are opposed to the non-seal portion between the pair of scar groups,
Among the plurality of half-cut lines, the pair of outermost half-cut lines is a region between virtual lines that respectively connect the upper ends and the lower ends of the pair of scar groups along the half-cut lines. A packaging bag that is formed to sandwich.   2. The packaging bag according to claim 1, wherein the plurality of half-cut lines extend across the non-seal part and reach the seal part of the pair of side end parts.   The packaging bag according to claim 1 or 2, wherein the plurality of half-cut lines reach outer edges of the pair of side end portions. The pair of half-cut lines arranged on the outermost side reach the outer edges of the pair of side end portions,
The packaging bag according to claim 1 or 2, wherein both ends of the half-cut line other than the pair of half-cut lines are located in the seal part of the pair of side end parts.   The packaging bag according to claim 1, wherein both ends of at least one of the plurality of half-cut lines are located in the non-seal portion in the vicinity of the seal portion.   The packaging bag according to any one of claims 1 to 5, wherein a plurality of the half-cut lines are formed in the region. The plurality of half-cut lines formed on one laminated film are linear,
The plurality of half-cut lines formed on the other laminated film are formed so as to swell toward the upper end or the lower end side in the central portion of the non-sealed portion. Packaging bag. The packaging bag as described in any one of Claims 1-7 provided with the resealing means which reseals the said accommodating part after opening by the said unsealing means to the said accommodating part side rather than the said opening means.

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