JP2019131297A - Packaging bag - Google Patents

Abstract

To provide a packaging bag formed of films structured to have a plurality of layers with various characteristics laminated therein, which can be opened more easily.SOLUTION: In a packaging bag 100, films 100a and 100b having a structure, in which a plurality of layers including at least a first synthetic resin layer 102 for securing strength, a metal layer 103 for shielding gas and a second synthetic resin layer 104 as a sealant layer are laminated therein so that the second synthetic resin layer 104 is arranged at an outermost side and the first synthetic resin layer 102 and the metal layer 104 are adjacent to each other, are formed in a bag shape with the second synthetic resin layer 104 arranged at an innermost side. In the first synthetic resin layer 102 of the films 100a and 100b are formed tearing-inducing weakening lines 110 (10 and 20) for inducing tearing of the films 100a and 100b.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a packaging bag having easy openability.

  A packaging bag having easy-openability described in Patent Document 1 is known. This packaging bag is formed by forming a film having a structure in which a base material layer and a sealant layer are laminated into a bag shape with the sealant layer inside. Specifically, the front film and the back film seal each peripheral portion of the front film and the back film with the sealant layer facing each other (form a side edge seal portion) to form a bag. It is formed. In this packaging bag, a notch (a tear start portion) is provided in each of a pair of opposed side edge seal portions. Then, two easy-open lines (tear-inducing weakening lines) for inducing tearing of the surface film are formed in the surface film so as to sandwich the notch, and two easy-open lines of the surface film are formed on the back film. Two easy-open lines are formed so as not to overlap.

  The easy-open line is formed on a base layer (for example, PET (polyethylene terephthalate), PP (polypropylene)) of a film (surface film, back film). For example, a linear groove is formed as the easy-opening line in the base material layer by laser processing or cutting with a blade. Such a linear groove weakens the portion, and the film is easily torn along the easy-open line (linear groove), so that the packaging bag can be easily opened ( Easy opening).

  In a packaging bag in which such an easy-opening line (tear-inducing weakening line) is formed, when the tearing of the packaging bag (surface film and back film) starts from the notch and the tearing reaches the easy-opening line, then The front film and the back film are torn while being guided by the easy opening line. Since the easy-open line formed on the front film and the easy-open line formed on the back film do not overlap, the packaging bag (front film, back film) is opened by tearing induced by each easy-open line. Then, the edge line of the opening cut opening of the surface film and the edge line of the opening opening opening of the back film are in a shifted state without overlapping. The opened packaging bag can be easily opened by picking the surface film or the back film at the shifted portion.

Japanese Patent Laid-Open No. 2006-137930

  By the way, a plurality of layers constituting the film forming the packaging bag as described above are a layer for securing strength, a layer for gas barrier, a layer as a sealant layer, a layer having high transparency and suitable for printing, etc. May include layers with various properties. In a packaging bag formed of a film having a structure in which a plurality of layers having such various characteristics are laminated, in order to facilitate opening, a tear-inducing weakening line (in which layer induces film tearing) ( It is important whether an easy-open line: for example, a linear groove) is formed.

  This invention is made | formed in view of such a situation, and enables it to open more easily in the packaging bag formed with the film of the structure where the several layer which has various characteristics was laminated | stacked. Is.

  In the packaging bag according to the present invention, a plurality of layers including at least a first synthetic resin layer for securing strength, a metal layer for gas shielding, and a second synthetic resin layer as a sealant layer include the first synthetic resin. A film having a laminated structure is formed in a bag shape with the second synthetic resin layer on the inside so that the layer and the metal layer are adjacent to each other, and the first synthesis of the film In the resin layer, a tear-inducing weakening line that induces tearing of the film is formed.

  With such a configuration, a tear-inducing weakening line is formed in the first synthetic resin layer for securing the strength. Therefore, even if the first synthetic resin layer is inherently difficult to tear due to the property of securing the strength, the tear-inducing weakening line. It is easy to be torn in the direction in which the tear induction weakening line extends. Further, the metal layer adjacent to the first synthetic resin layer is also easily torn in the direction in which the tear induction weakening line extends as the first synthetic resin layer is torn.

  The tear induction weakening line is not particularly limited as long as it is weakened linearly so that tearing can be induced. For example, even a linear groove is a row of fine holes arranged in a line. Alternatively, it may be a line of short lines arranged in a line (broken line shape) or may be in another form. The tear induction weakening line can be, for example, a linear groove formed in the first synthetic resin layer by laser processing. In this case, the linear groove may have a depth reaching the metal layer adjacent to the first synthetic resin layer.

  Thus, when forming a linear groove having a depth reaching the metal layer adjacent to the first synthetic resin layer by laser processing, the laser light reflected by the metal layer can be absorbed again by the first synthetic resin layer. Therefore, the linear groove can be efficiently formed in the first synthetic resin layer.

  In the packaging bag according to the present invention, in particular, the first synthetic resin layer on which the tear-inducing weakening line is formed may be a polyamide synthetic resin layer.

  In the packaging bag according to the present invention, the first synthetic resin layer adjacent to the metal layer and formed with the tear-inducing weakening line may be arranged between the metal layer and the second synthetic resin layer. it can.

  The packaging bag which concerns on this invention WHEREIN: The 1st synthetic resin layer adjacent to a metal layer and in which a tear induction | damage weakening line is formed can be set as the structure arrange | positioned on the outer side of the said metal layer.

  Further, the packaging bag according to the present invention is divided into two regions by an openable / closable fastener, and an accommodation portion is formed in one region on the one side of the fastener, and the tear induction weakening is formed. The line may be formed in a region on the other side with the fastener as a boundary.

  With such a configuration, a tear-inducing weakening line is formed in a region on the opposite side of the accommodating portion that accommodates the content with the fastener as a boundary. In particular, the first synthetic resin layer for securing strength is linearly formed Even if the tear-induced weakening line to be weakened is formed in a wide range and the strength of the planned tearing portion is reduced due to the tear-inducing weakening line, the propagation of the drop impact is prevented, and the entire packaging bag containing the contents is prevented. The influence of strength reduction can be reduced. As a result, it is possible to realize a packaging bag having good easy-openability as a packaging bag for storing contents.

  Furthermore, in the packaging bag according to the present invention, the film includes a first film and a second film, and the first film and the second film face each other with a second synthetic resin layer facing each other. A tear start portion is formed at a joint portion formed by joining the peripheral portions of the first film and the second film to form a bag shape and joining the peripheral portions of the first film and the second film. A formed packaging bag, wherein the tear-inducing weakening line includes a first tear-inducing weakening line formed in the first film and a second tear-inducing weakening line formed in the second film. The first tear-inducing weakening line includes a first main guiding line extending in a direction away from the joint, and the second tear-inducing weakening line extends in a direction away from the joint, and the tear-opening A second main guide line disposed on the opposite side of the first main guide line with respect to a virtual line extending in a tearing direction starting from the portion, wherein the first tear guide weakening line is further provided by the first main guide line And the second main guide line, including a first inclined auxiliary guide line extending obliquely toward the first main guide line in a direction away from the joint, and the second tear guide weakening The line further includes a second inclination auxiliary member extending obliquely toward the second main guide line and in a direction away from the joint within the interval between the first main guide line and the second main guide line. And a guide wire.

  According to such a configuration, when the packaging bag (film: first film and second film) starts to tear in the direction away from the joining portion from the tear start portion, the first tear induction weakening line is formed. In the film, the tear can reach the first tilt auxiliary guide line. When the tear reaches the first inclined auxiliary guiding line, the tear is guided by the first inclined auxiliary guiding line and proceeds toward the first main guiding line. Then, when the tear that is guided by the first inclined auxiliary guide line reaches the first main guide line, the tear is guided by the first main guide line and proceeds away from the joint.

  On the other hand, in the second film in which the second tear induction weakening line is formed, the tear from the tear starting portion can reach the second inclined auxiliary induction line. When the tear reaches the second tilt auxiliary guide line, the tear is guided by the second tilt auxiliary guide line, and the first main guide line with respect to an imaginary line extending in the tear direction starting from the tear starting portion. And proceed toward the second main guide line arranged on the opposite side. Then, when the tear that is guided by the second inclined auxiliary guide line reaches the second main guide line, the tear is guided by the second main guide line and proceeds in a direction away from the joint.

  When the first film is guided and torn by the first main guide line and the second film is guided and torn by the second main guide line, the packaging bag is opened when the packaging bag is opened. The edge line of the opening cut opening of one film corresponds to the first main guiding line, and the edge line of the opening cutting opening of the second film corresponds to the second main guiding line. Since the first main guide line and the second main guide line are formed so as not to overlap, the edge line of the opening opening of the first film and the edge line of the opening opening of the second film do not overlap, It will be in a shifted state. The packaging bag opened by picking the first film or the second film at the shifted portion can be easily opened.

  In this case, the first main guide line formed on the first film and the second main guide film line formed on the second film are simply opposite to the virtual line extending in the tearing direction starting from the tear start portion. Since it is arranged, the distance between the first main guide line and the second main guide line can be made relatively large. As a result, the deviation between the opening line of the first film corresponding to the first main guide line and the opening line of the second film can be made relatively large. Therefore, after opening the packaging bag, the packaging bag opened by picking the first film or the second film which is relatively largely displaced can be opened more easily.

  In the packaging bag according to the present invention, the first tear induction weakening line further includes a first auxiliary induction line extending in a direction from the joint portion toward the first inclined auxiliary induction line, and the second tear induction weakening line. May further include a second auxiliary guide line extending in a direction from the joint portion toward the second inclined auxiliary guide line.

  With such a configuration, in the first film in which the first tear induction weakening line is formed, the tear from the tear starting portion can reach the first auxiliary induction line. When the tear reaches the first auxiliary guiding line, the tear is guided by the first auxiliary guiding line and proceeds toward the first inclined auxiliary guiding line. When the tear that is guided by the first auxiliary guiding line reaches the first inclined auxiliary guiding line, the tear is further guided by the first inclined auxiliary guiding line and proceeds toward the first main guiding line. . Then, when the tear guided and guided by the first inclined auxiliary guide line reaches the first main guide line, the tear is guided by the first main guide line and proceeds in a direction away from the connecting portion.

  On the other hand, in the second film in which the second tear induction weakening line is formed, tearing from the tear starting portion can proceed to the second auxiliary induction line. When the tear reaches the second auxiliary guide line, the tear is guided by the second auxiliary guide line and proceeds toward the second inclined auxiliary guide line. When the tear guided and guided by the second auxiliary guiding line reaches the second inclined auxiliary guiding line, the tear is further guided by the second inclined auxiliary guiding line and proceeds toward the second main guiding line. When the tear guided and guided by the second inclined auxiliary guide line reaches the second main guide line, the tear is guided by the second main guide line and proceeds in a direction away from the connecting portion.

  As described above, the first film is guided to the first main guide line and torn, and the second film is guided to the second main guide line and torn to open the packaging bag.

  In the packaging bag according to the present invention, the first inclined auxiliary guiding wire and the second inclined auxiliary guiding wire are formed so as to overlap in a state where the first film portion and the second film portion overlap each other. It can be configured.

  According to such a structure, since the 1st inclination auxiliary guide line formed in the 1st film and the 2nd inclination auxiliary induction line formed in the 2nd film have overlapped, the 1st film which starts from a tear start part And the tear of the second film starting from the tear start portion are led to the first main guide line and the second main guide line with a smaller time difference. As a result, the first film and the second film can be torn with a better balance.

  In the packaging bag of the present invention, the film includes a first film and a second film, and the first film and the second film face each other with the second synthetic resin layer facing each other. And each peripheral part of the said 2nd film was joined, it formed in the bag shape, and the tear start part was formed in the junction part formed by joining each peripheral part of the said 1st film and the said 2nd film The tear-inducing weakening line includes a first tear-inducing weakening line formed in the first film and a second tear-inducing weakening line formed in the second film; One tear induction weakening line extends in a direction away from the joint, and two first main inductions arranged on opposite sides of a virtual line extending in the tearing direction starting from the tear start portion. A first inclined auxiliary guide line extending obliquely toward one of the two first main guide lines, a direction away from the joint, and the 2 A second inclined auxiliary guiding line that extends obliquely toward the other of the first main guiding lines and intersects the first inclined auxiliary guiding line, wherein the second tear-inducing weakening line includes the joint And extending in a direction away from the portion, and disposed within the interval between the two first main guide wires formed on the first film without overlapping the two first main guide wires. It can be set as the structure containing a some 2nd main guide wire.

  According to such a configuration, when the packaging bag (film: first film and second film) starts to tear in the direction away from the joining portion from the tear start portion, the first tear induction weakening line is formed. In the film, the tear can reach the first tilt auxiliary guide line or the second tilt auxiliary guide line. When the tear reaches the first tilt guiding auxiliary line, the tear is guided by the first tilt guiding auxiliary line and proceeds toward one of the two first main guiding lines. When the tear reaches one of the two first main guide lines, the tear is guided by the first main guide line and proceeds in a direction away from the joint. On the other hand, when the tear from the tear starting portion reaches the second inclined auxiliary guiding line, the tear is guided to the second inclined guiding auxiliary line and goes to the other of the two first main guiding lines. You can go on. When the tear reaches the other of the two first main guide lines, the tear is guided by the first main guide line and proceeds in a direction away from the joint.

  On the other hand, in the second film in which the second tear-inducing weakening line is formed, tearing from the tear starting portion is within the interval between the two first main guiding lines formed in the first film. One of the plurality of second main guide lines formed without overlapping the first main guide line can be reached. When the tear reaches any one of the plurality of second main guide lines, the tear is guided by the second main guide line and proceeds in a direction away from the joint.

  When the first film is guided and torn by the first main guide line and the second film is guided and torn by the second main guide line, the packaging bag is opened when the packaging bag is opened. The edge line of the opening cut opening of one film corresponds to the first main guiding line, and the edge line of the opening cutting opening of the second film corresponds to the second main guiding line. Since the first main guide line and the second main guide line are formed so as not to overlap, the edge line of the opening opening of the first film and the edge line of the opening opening of the second film do not overlap. , Will be in a shifted state. The packaging bag opened by picking the first film or the second film at the shifted portion can be easily opened.

  In the packaging bag according to the present invention, the first tear-inducing weakening line further includes the first inclined auxiliary guiding line and the second inclined auxiliary guiding line from the joint within the interval between the two first main guiding lines. It can be set as the structure containing the auxiliary | assistant guide wire extended in the direction which goes to a line.

  According to such a configuration, in the first film, the tear started from the tear start portion can reach the auxiliary guiding line before reaching the first inclined auxiliary guiding line or the second inclined auxiliary guiding line. When the tear reaches the auxiliary guiding line, the tear is guided by the auxiliary guiding line and proceeds toward either the first inclined auxiliary guiding line or the second inclined guiding line. Therefore, the tear started from the tear induction start portion can be more reliably guided to the first inclined auxiliary guiding line or the second inclined auxiliary guiding line.

  In the packaging bag according to the present invention, the film includes a first film and a second film, and the first film and the second film face each other with the second synthetic resin layer facing each other. A tear start portion is formed at a joint portion formed by joining the peripheral portions of the film and the second film to form a bag shape and joining the peripheral portions of the first film and the second film. The tear-inducing weakening line includes a first tear-inducing weakening line formed in the first film and a second tear-inducing weakening line formed in the second film, The first tear-inducing weakening line extends in a direction away from the joint portion, and two first main lines respectively disposed on opposite sides with respect to a virtual line extending in the tearing direction starting from the tear start portion. A bending auxiliary guiding wire having a bent shape that is divided and directed toward both of the two first main guiding wires in a direction away from the joint within the interval between the two first main guiding wires, The second tear induction weakening line extends in a direction away from the joint, and overlaps the two first main induction lines within an interval between the two first main induction lines formed in the first film. It can be set as the structure containing the some 2nd main guide wire formed so that it may be arrange | positioned without.

  According to such a configuration, when the packaging bag (film: first film and second film) starts to tear in the direction away from the joining portion from the tear start portion, the first tear induction weakening line is formed. In the film, the tear can reach the bending assist guide line. When the tear reaches the bending auxiliary guide line, the tear is guided to the bending auxiliary guide line that is divided into the two first main guide lines, and the two first main lines are away from the joint. You can go towards any of the guide lines. When the tear reaches one of the two first main guide lines, the tear is guided by the first main guide line and proceeds in a direction away from the joint. On the other hand, when the tear guided by the auxiliary bending guide line reaches the other of the two first main guide lines, the tear is guided by the first main guide line and away from the joint. move on.

  On the other hand, in the second film in which the second tear-inducing weakening line is formed, tearing from the tear starting portion is within the interval between the two first main guiding lines formed in the first film. One of the plurality of second main guide lines formed without overlapping the first main guide line can be reached. When the tear reaches any one of the plurality of second main guide lines, the tear is guided by the second main guide line and proceeds in a direction away from the joint.

  When the first film is guided and torn by the first main guide line and the second film is guided and torn by the second main guide line, the packaging bag is opened when the packaging bag is opened. The edge line of the opening cut opening of one film corresponds to the first main guiding line, and the edge line of the opening cutting opening of the second film corresponds to the second main guiding line. Since the first main guide line and the second main guide line are formed so as not to overlap, the edge line of the opening opening of the first film and the edge line of the opening opening of the second film do not overlap. , Will be in a shifted state. The packaging bag opened by picking the first film or the second film at the shifted portion can be easily opened.

  In the packaging bag according to the present invention, the first tear guide weakening line further includes an auxiliary guide line extending in a direction from the joint toward the bending auxiliary guide line within an interval between the two first main guide lines. It can be set as the structure which has.

  According to such a configuration, in the first film, the tear started from the tear start portion can reach the auxiliary guiding line before reaching the bending auxiliary guiding line. When the tear reaches the auxiliary guiding line, the tear is guided by the auxiliary guiding line and proceeds toward the bending auxiliary guiding line. Therefore, the tear started from the tear induction start portion can be more reliably guided to the bending auxiliary guide line.

  In the packaging bag according to the present invention, the film includes a first film and a second film, and the first film and the second film face each other with the second synthetic resin layer facing each other. A tear start portion is formed at a joint portion formed by joining the peripheral portions of the film and the second film to form a bag shape and joining the peripheral portions of the first film and the second film. The tear-inducing weakening line includes a first tear-inducing weakening line formed in the first film and a second tear-inducing weakening line formed in the second film, The first tear-inducing weakening line and the second tear-inducing weakening line overlap each other in the same region extending in the tearing direction and in the same region extending in the tearing direction. And a non separating portion, the length of the tear direction of a region in which the overlapping portion is formed is longer than the tear direction of the length of the region where the separation portion is formed, it may be configured.

  According to such a configuration, when the packaging bag (film: first film and second film) starts to tear in the direction away from the joining portion from the tear start portion, the first film is guided to the first tear induction weakening line. While being torn, the second film is torn while being guided by the second tear-inducing weakening line. In the process, when the overlapping portion of the first tear-inducing weakening line and the second tear-inducing weakening line is torn, the first tear film and the second film are torn apart without overlapping the actual tearing line. On the other hand, when the separated portion of the first tear induction weakening line and the second tear induction weakening line is torn, the first film and the second film are torn apart in a state where the actual tear line is deviated.

  The first film is guided by the first tear-inducing weakening line and is torn, and the second film is guided by the second tear-inducing weakening line and is torn to form the packaging bag. The edge line of the opening cut opening of the first film corresponds to the first tear induction weakening line, and the edge line of the opening opening of the second film corresponds to the second tear induction weakening line. Since the separation part of the first tear-inducing weakening line and the second tear-inducing weakening line are formed so as not to overlap, the edge line of the opening cut opening of the first film corresponding to the separation part and the opening cutting opening of the second film It will be in a shifted state without overlapping with the edge line. The packaging bag opened by picking the first film or the second film at the shifted portions can be easily opened.

  On the other hand, at the overlapping portion of the first tear induction weakening line and the second tear induction weakening line, the first film and the second film are torn without the tear line being displaced, so that the first film is not dispersed. And the second film can be torn. As a result, the first film and the second film (packaging bag) can be smoothly torn at the overlapping portion of the first tear induction weakening line and the second tear induction weakening line.

  And since the length in the tearing direction of the region where the overlapping portion is formed is longer than the length in the tearing direction of the region where the separating portion is formed, the packaging bag can be torn longer and smoothly. After the tearing is completed and the packaging bag is opened, the opened packaging bag can be easily opened by picking a portion where the opening opening of the first film and the opening opening of the second film are shifted.

  In the packaging bag according to the present invention, the overlapping portion includes a first overlapping portion and a second overlapping portion, and in the tearing direction from the tear starting portion, the first overlapping portion, the separating portion, and the second overlapping portion. It can be set as the structure formed so that an overlap part may be arranged in the order.

  According to such a configuration, when the packaging bag (film: first film and second film) starts to tear away from the tear start portion in the direction away from the joint portion, the first tear induction weakening line and the second tear induction weakening are achieved. The first film and the second film are torn in the order of the first overlapping portion, the separating portion, and the second overlapping portion of the line. Then, when the packaging bag is opened by tearing the first film and the second film, the edge line of the opening cut opening of the first film corresponding to the first overlapping portion and the second overlapping portion and the second film A portion where the edge line of the opening cut opening of the first film and the edge line of the opening opening of the second film are shifted is disposed between the two portions where the edge line of the opening opening overlaps.

  In the packaging bag according to the present invention, the first tear induction weakening line has a first main induction line extending in a direction away from the joint, and the second tear induction weakening line is in a direction away from the joint. A second main guide line extending; the overlapping portion includes a straight portion in each of the first main guide line and the second main guide line; and the separation portion includes a first shape in the first main guide line. A configuration including a line portion and a second shape line portion different from the first shape line portion in the second main guide line can be adopted.

  According to such a configuration, when the packaging bag (film: first film and second film) starts to tear away from the tear start portion in the direction away from the joint portion, the first film has the first tear-inducing weakening line. The second film may be torn while being guided by the first main guide line and guided by the second main guide line of the second tear-inducing weakening line. In this case, the first film and the second film are torn while being guided by a linear portion (overlapping portion) where the first main guide line and the second main guide line overlap, and the first main guide line and the second film The main guide wire is torn while being guided by the first shape portion and the second shape portion (separation portion) that do not overlap.

  Since the overlapping portion is a straight portion of the first main guiding line and the second main guiding line, the first film and the second film are straightened by guiding the first main guiding line and the second main guiding line in this overlapping portion. It can be torn smoothly depending on the shape. When the first film and the second film are torn and the packaging bag is opened, the opening line of the first film corresponding to the first shape portion and the second film corresponding to the second shape portion. It will be in the state which shifted | deviated, without overlapping with the edge line of opening opening of. The packaging bag opened by picking the first film or the second film at the shifted portions can be easily opened.

  The packaging bag which concerns on this invention WHEREIN: A said 1st shape line part can be set as the structure which is a linear part and a said 2nd shape line part is a curve line part.

  According to such a configuration, in the separation part, the first film is torn while being guided by the straight part of the first main guide line, and the second film is torn while being guided by the curved part of the second main guide line. .

  The packaging bag which concerns on this invention WHEREIN: Each of the said 1st main guide wire and the said 2nd main guide wire can be set as the structure extended continuously from the said tear start part.

  According to such a configuration, the tear starting from the tear start portion is more smoothly guided to the first main guide line in the first film and more smoothly guided to the second main guide line in the second film. It becomes like this.

  In the packaging bag according to the present invention, the first tear induction weakening line includes a first auxiliary induction line that guides tearing from the tear starting portion to the first main induction line, and the second tear induction weakening line is A second auxiliary guide line that guides tearing from the tear starting portion to the second main guide line, and the first auxiliary guide weakening line and the second auxiliary guide weakening line are included in the overlapping portion. It can be configured.

  According to such a configuration, even if the tear from the tear starting portion is slightly deviated from the direction toward the first main guide line in the first film, if the tear reaches the first auxiliary guide line, the first main You can go smoothly to the guide line. Further, even if the tear from the tear start portion is slightly deviated from the direction toward the second main guide line in the second film, if the tear reaches the second auxiliary guide line, the tear proceeds to the second main guide line. Can do. Further, since the first auxiliary guide line and the second auxiliary guide line are overlapped portions, the tear from the tear starting portion is guided to the first auxiliary guide line and the second auxiliary guide line at the same time. You can proceed to the main guide line and the second main guide line. As a result, the tearing of the first film and the second film starting from the tear start portion can be continued more smoothly.

  In addition, from the viewpoint of easy picking of a portion where the edge line of the opening opening of the first film corresponding to the separation portion and the edge line of the opening opening of the second film after tearing, the packaging bag according to the present invention The film includes a first film and a second film, and the first film and the second film have the first film and the second film facing each second synthetic resin layer. Each of the peripheral edges of each of the first film and the second film is formed into a bag shape, and a tearing start portion is formed at a joint formed by joining the peripheral edges of the first film and the second film. The tear induction weakening line includes a first tear induction weakening line formed on the first film and a second tear induction weakening line formed on the second film, and the first tear induction weakening line. And said The tear-inducing weakening line has an overlapping portion that overlaps each other in the same region extending in the tearing direction and a separation portion that does not overlap each other in the same region extending in the tearing direction. The length in the tear direction is longer than the length in the tear direction in the region where the separation portion is formed, and the portion of the first tear induction weakening line and the portion of the second tear induction weakening line in the separation portion The maximum separation distance can be 1 mm or more and 5 mm or less. Further preferably, the maximum separation interval may be 3 mm or more and 5 mm or less.

  According to the packaging bag according to the present invention, since the tear induction weakening line is formed in the first synthetic resin layer for securing the strength, even the first synthetic resin layer that is inherently difficult to tear due to the property of securing the strength, While being guided by the tear induction weakening line, it is easy to tear in the extending direction of the tear induction weakening line, and further, the metal layer adjacent to the first synthetic resin layer is also torn along with the tearing of the first synthetic resin layer. It becomes easy to tear in the direction in which the tear-inducing weakening line extends. Therefore, in a packaging bag formed of a film having a structure in which layers of various characteristics including a first synthetic resin layer, a metal layer, and a second synthetic resin layer for ensuring strength are laminated, it can be opened more easily. become able to.

FIG. 1 is a front view showing a main part of the packaging bag according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view showing an example of a layer structure of a film constituting the packaging bag shown in FIG. FIG. 3A is a diagram illustrating a configuration example of a first tear induction weakening line formed on a front film (first film) included in the packaging bag illustrated in FIG. 1. FIG. 3B is a diagram illustrating a configuration example of a second tear induction weakening line formed on the back film (second film) that configures the packaging bag illustrated in FIG. 1. FIG. 4 is a diagram showing a relative positional relationship between the first tear guide line and the second tear guide line formed on the packaging bag (front film, back film). FIG. 5 is a cross-sectional view showing a structural example of a tear-inducing weakening line formed on a packaging bag (front side film, back side film). FIG. 6 is a diagram showing an example of how to tear when opening the packaging bag in which the tear-inducing weakening line shown in FIGS. 1, 3A, 3B, and 4 is formed. FIG. 7 is a view showing an opening of the packaging bag that is torn and opened by the tearing method shown in FIG. FIG. 8 is a cross-sectional view showing a structural example of a tear-inducing weakening line formed on a packaging bag (front side film, back side film) having another layer configuration. FIG. 9 is a cross-sectional view showing a structure example of a tear-inducing weakening line formed on a packaging bag formed of a film having another layer structure. FIG. 10: is a front view which shows the principal part of the packaging bag based on the 2nd Embodiment of this invention. FIG. 11A is a diagram illustrating a configuration example of a first tear induction weakening line formed on a front film (first film) included in the packaging bag illustrated in FIG. 10. FIG. 11B is a diagram illustrating a configuration example of a second tear induction weakening line formed on the back film (second film) that configures the packaging bag illustrated in FIG. 10. FIG. 12 is a diagram showing a relative positional relationship between the first tear induction weakening line and the second tear induction weakening line formed on the packaging bag (front film, back film). FIG. 13 is a diagram showing an example of how to tear when opening the packaging bag in which the tear-inducing weakening line shown in FIGS. 10, 11A, 11B, and 12 is formed. FIG. 14 is a view showing an opening cut opening of the packaging bag that is torn open by the tearing method shown in FIG. FIG. 15: is a front view which shows the principal part of the packaging bag based on the 3rd Embodiment of this invention. 16A is a diagram illustrating a configuration example of a first tear induction weakening line formed on a front film (first film) included in the packaging bag illustrated in FIG. 15. FIG. 16B is a diagram illustrating a configuration example of a second tear induction weakening line formed on the back film (second film) included in the packaging bag illustrated in FIG. 15. FIG. 17 is a diagram showing a relative positional relationship between the first tear induction weakening line and the second tear induction weakening line formed on the packaging bag (front film, back film). FIG. 18 is a diagram showing an example of how to tear when opening the packaging bag in which the tear-inducing weakening line shown in FIGS. 15, 16A, 16B, and 17 is formed. FIG. 19 is a view showing an opening cut opening of the packaging bag that is torn open by the tearing method shown in FIG. FIG. 20 is a diagram showing another example of how to tear when opening the packaging bag formed with the tear-inducing weakening line shown in FIGS. 15, 16A, 16B, and 17. FIG. FIG. 21 is a diagram showing an opening cut of the packaging bag that is torn and opened by the tearing method shown in FIG. 20. FIG. 22 is a front view showing a main part of the packaging bag according to the fourth embodiment of the present invention. FIG. 23 is a diagram illustrating a configuration example of a first tear induction weakening line formed on the front film (first film) included in the packaging bag illustrated in FIG. 22. FIG. 24 is a diagram showing a relative positional relationship between the first tear induction weakening line and the second tear induction weakening line formed on the packaging bag (front film, back film). FIG. 25 is a diagram showing an example of how to tear when opening the packaging bag formed with the tear-inducing weakening line shown in FIGS. 22, 23, and 24. FIG. 26 is a diagram showing an opening cut of the packaging bag that is torn and opened by the tearing method shown in FIG. FIG. 27 is a diagram showing another example of how torn when opening the packaging bag formed with the tear induction weakening line shown in FIGS. 22, 23, and 24. FIG. 28 is a diagram showing an opening cut of the packaging bag that is torn open by the tearing method shown in FIG. FIG. 29 is a front view showing a main part of a packaging bag according to a fifth embodiment of the present invention. FIG. 30 is a diagram showing an example of how torn when the packaging bag shown in FIG. 29 is opened. FIG. 31 is a diagram showing an opening cut of the packaging bag that is torn open by the tearing method shown in FIG. FIG. 32 is a diagram illustrating a modification of the left first auxiliary guide line and the left second auxiliary guide line. FIG. 33 is a front view showing a main part of a packaging bag according to a sixth embodiment of the present invention. FIG. 34 is a diagram showing a modification of the first main guide line and the second main guide line. FIG. 35 is a diagram showing another modification of the first main guide line and the second main guide line. FIG. 36 is a diagram showing the maximum separation distance between the first tear-inducing weakening line portion and the second tear-inducing weakening line portion in the separated portion. FIG. 37 is a graph showing the relationship between the amount of shift of the cut after opening corresponding to the maximum separation distance, the opening time S, and the score evaluation Q of ease of opening. FIG. 38A is a diagram showing a result (part 1) of the tear-open test of the packaging bag shown in FIG. FIG. 38B is a diagram showing a result (part 2) of the tear open test of the packaging bag shown in FIG. 36. FIG. 38C is a diagram showing a result (part 3) of the tear-open test of the packaging bag shown in FIG. 36. FIG. 39 is a cross-sectional view showing the layer structure of the first film and the second film forming the packaging bag in which the comparative example of the opening test is implemented, and the tear-inducing weakening line formed. FIG. 40 is a diagram showing the results of a comparative example of the opening test.

  Embodiments of the present invention will be described with reference to the drawings.

  The packaging bag according to the first embodiment of the present invention is configured as shown in FIG.

  In FIG. 1, this packaging bag 100 is a pouch with a fastener, for example, and a plurality of layers, for example, a film having a structure in which four layers are laminated as will be described later, is formed in a bag shape. Yes. Specifically, the front side film 100a (first film) having a structure in which a plurality of layers are laminated, and the back side film 100b (second film) having a structure in which a plurality of layers are laminated, Joined to form a bag.

  Each of the front film 100a and the back film 100b includes, for example, as shown in FIG. 2, a PET layer 101 made of polyethylene terephthalate, a NY layer 102 made of nylon which is a polyamide synthetic resin, and an aluminum layer 103 made of aluminum foil. In addition, four layers of PE layer 104 made of polyethylene are laminated. The PET layer 101 is highly transparent, has a property of good dimensional stability that hardly stretches and shrinks, and is suitable as a printing layer. The NY layer 102 (polyamide synthetic resin layer) is a layer (first synthetic resin layer) for securing strength, having a property that is resistant to impact and bending and is difficult to make a hole. The aluminum layer 103 is a metal layer for shielding the entrance and exit of gases such as air (oxygen) and moisture with this layer as a boundary. The PE layer 104 has a property of melting at about 100 ° C. to 130 ° C., and is a layer (second synthetic resin layer) as a sealant layer suitable for heat fusion.

  In this way, the front side film 100a and the back side film 100b having a structure in which the PE layer 104 and the PET layer 101 are disposed on the outermost sides of the front and back sides and the NY layer 102 and the aluminum layer 103 are adjacent to each other are provided for each PE. With the layers 101 facing each other, the PE layers 101 in the peripheral portions of the front film 100a and the second film 100b are sealed (bonded) by heat-sealing to form a bag shape. Thus, with the PE layer 104 inside, as shown in FIG. 1, sealing is performed by peripheral seal portions (joint portions) 41, 42, and 43 (the lower seal portion facing the seal portion 43 is omitted). A packaging bag 100 is formed.

  The packaging bag 100 is provided with a plastic fastener 50 that extends linearly between the two seal portions 41 and 42 that face each other in a lateral direction at a position spaced apart from the upper seal portion 43 by a predetermined distance. . The plastic fastener 50 has a known structure and can be opened and closed. With the plastic fastener 50 as a boundary, an accommodation portion for contents (for example, food and drink) is formed in a region opposite to the upper seal portion 43. By opening the plastic fastener 50, the contents can be taken out from the accommodating portion, and by closing the plastic fastener 50, the accommodating portion in which the contents are accommodated can be sealed.

  When the packaging bag 100 is provided with a gusset portion at the bottom, the upper peripheral edge of each of the front film 100a and the back film 100b accommodates the contents in the container with the plastic fastener 50 open. After that, the plastic fastener 50 is closed and sealed in a state where the accommodating portion is sealed, and the upper seal portion 43 is formed. When the packaging bag 100 is a flat pouch that does not have a gusset portion, after the upper seal portions 18 of the front film 100a and the back film 100b are formed, the contents are accommodated from the lower peripheral edge portion. Thus, a lower seal portion is formed.

  The sealing part 41 on the left side of the packaging bag 100 easily starts the tearing of the packaging bag 100 (the front film 100a and the back film 100b) at a predetermined position below the upper sealing part 43 and above the plastic fastener 50. A notch 30 (a tear start portion) such as a notch is formed. Further, in each of the front side film 100a and the back side film 100b, as shown in FIGS. 3A, 3B, and 4 together with FIG. 1, the film was weakened linearly in order to induce tearing from the notch 30. Tear-inducing weakening lines 10 and 20 are formed.

  As shown in FIG. 3A together with FIG. 1, a first tear-inducing weakening line 10 is formed on the front film 100a. Further, as shown in FIG. 3B together with FIG. 1, a second tear induction weakening line 20 is formed on the back film 100 b. The first tear guide weakening line 10 includes a first main guide line 11, four first inclined auxiliary guide lines 12 (121, 122, 123, 124), and a first protruding regulation guide line 13. The second tear guide weakening line 20 includes a second main guide line 21, four second inclined auxiliary guide lines 22 (221, 222, 223, 224) and a second protrusion regulating guide line 23.

  In the front film 100a (see FIG. 1 and FIG. 3A), the first main guide wire 11 extends in a predetermined position below the notch 30 from the edge of the seal portion 41 to the edge of the opposing seal portion 42. Is formed. The first protrusion regulating guide line 13 restricts the tearing from the notch 30 from sticking out of a predetermined range and greatly deviating in the direction of the upper seal portion 43, and is formed as described later. It is a tearing induction weakening line for guiding toward the tilt auxiliary guiding line 12. The first protrusion regulating guide line 13 extends linearly from the edge of the seal portion 41 to a predetermined position inside the seal portion 41 at a predetermined position opposite to the first main guide wire 11 with respect to the notch 30. Is formed. The four first inclined auxiliary guide wires 12 (121, 122, 123, 124) are in a direction away from the seal portion 41 within the interval between the first main guide wire 11 and the first protrusion control guide wire 13, and It is formed so as to extend obliquely toward the first main guide wire 11.

  In the back-side film 100b (see FIGS. 1 and 3B), the second main guide wire 21 is located at a predetermined position above the notch 30 from the edge of the seal part 41 (one edge of the packaging bag 100). It is formed so that it may extend linearly to the edge (the other edge of the packaging bag 100). The second protrusion restriction guide line 23 having the same function as the first protrusion restriction guide line 13 described above is located at a predetermined position opposite to the second main guide line 21 with respect to the notch 30 from the edge of the seal portion 41. It is formed so as to extend linearly to a predetermined position inside the seal portion 41. The four second inclined auxiliary guide wires 22 (221, 222, 223, 224) are in a direction away from the seal portion 41 within the interval between the second main guide wire 21 and the second protrusion regulating guide wire 23, and It is formed to extend obliquely toward the second main guide wire 21.

  In the packaging bag 100, the first tear guide weakening line 10 (the first main guide line 11, the first inclined auxiliary guide line 12, and the first protruding regulation guide line 13) formed on the front film 100a and the back film 100b are formed. The relative positional relationship between the second tearing induction weakening line 20 (second main guiding line 21, second inclined auxiliary guiding line 22, and second protrusion regulating guiding line 23) is as shown in FIG.

  In FIG. 4, the first main guide line 11 (solid line) and the second main guide line 21 (broken line) are opposite to the virtual line CL extending in the tearing direction starting from the notch 30, for example, on the virtual line CL. It arrange | positions so that it may become symmetrical with respect to it. Similarly, the first protrusion regulation guide line 13 (solid line) and the second protrusion regulation guide line 23 (not overlapping with the solid line representing the first main guide line 11) are also opposite to the virtual line CL. It arrange | positions so that it may become symmetrical with respect to the side, for example, virtual line CL. In addition, the four first inclined auxiliary guide wires 12 (solid lines) are separated from the seal portion 41 within the interval W between the first main guide wire 11 (solid line) and the second main guide wire 21 (broken line). And it extends diagonally toward the first main guide wire 11. The four second auxiliary auxiliary guiding lines 22 (broken lines) are in a direction away from the seal portion 41 within the interval W between the first main guiding line 11 (solid line) and the second main guiding line 21 (broken line), and It extends obliquely toward the second main guide wire 21. The four first inclined auxiliary guiding lines 12 and the four second inclined guiding lines 22 are in an overlapping positional relationship and are inclined in opposite directions.

  As described above, the first tear guide weakening line 10 (first main guide line 11, first inclined auxiliary guide line 12, first protrusion regulating guide line 13) and second tear guide weakening line 20 (second main guide). The tear-inducing weakening lines of the line 21, the second auxiliary auxiliary guiding line 22, and the second protruding regulation guiding line 23) are formed on the front film 100a and the back film 100b by known laser processing. Specifically, as shown in FIG. 5, in each of the front side film 100a and the back side film 100b, the laser light irradiated from the PET layer 101 side is used to form aluminum from the PET layer 101 and the NY layer 102 (polyamide synthetic resin layer). A linear groove 110 having a depth reaching the layer 103 is formed as the tear induction weakening line (first tear induction weakening line 10, second tear induction weakening line 20).

  The packaging bag 100 described above can be opened, for example, as shown in FIG.

  In FIG. 6, when the packaging bag 100 (the front film 100a and the back film 100b) starts to tear from the notch 30 toward the seal part 42 on the opposite side from the seal part 41, the first tear induction weakening line 10 is formed. In the front film 100a, the tearing proceeds in a direction away from the seal portion 41, and can reach, for example, the first inclined auxiliary guide wire 124. When the tear reaches the first tilt auxiliary guide line 124, the tear is guided by the first tilt auxiliary guide line 124 and proceeds. Even if the tear is separated from the first inclined auxiliary guiding line 124, the tear reaches the next first inclined auxiliary guiding line 123, and is further guided to the first inclined auxiliary guiding line 123 and proceeds toward the first main guiding line 11. . When the tear that is guided by the first inclined auxiliary guide wire 123 reaches the first main guide wire 11, the tear is guided to the first main guide wire 11 and the seal portion 42 on the opposite side (see FIG. 1). ) (See La in FIG. 6).

  On the other hand, in the back film 100b in which the second tear induction weakening line 20 is formed, the tear from the notch 30 can reach, for example, the second inclined auxiliary guide line 222. When the tear reaches the second tilt auxiliary guide line 22, the tear is guided by the second tilt auxiliary guide line 222 and proceeds. Even if the tear is separated from the second inclined auxiliary guiding line 222, the tear reaches the next second inclined auxiliary guiding line 223, and is further guided to the second inclined auxiliary guiding line 223 and proceeds toward the second main guiding line 21. . When tearing guided by the second inclined auxiliary guide wire 223 reaches the second main guide wire 21, the tear is guided by the second main guide wire 21 and the seal portion 42 on the opposite side (see FIG. 1). ) (See Lb in FIG. 6).

  As described above, when the tearing started from the notch 30 reaches the edge of the seal portion 42 on the opposite side in both the front film 100a and the back film 100b, the packaging bag 100 is opened. When the packaging bag 100 is opened in this way, as shown in FIG. 7, the edge line La of the opening cut opening of the front film 100a corresponds to the first inclined auxiliary guiding lines 124, 123 and the first main guiding line 11, The edge line Lb of the unsealing opening of the back film 100b corresponds to the second inclined auxiliary guide lines 222 and 223 and the second main guide line 21. Here, since the first main guide wire 11 and the second main guide wire 21 are formed so as not to overlap (see FIG. 4), the edge line La of the opening cut edge of the front film 100a and the opening of the back film 100b are opened. The cut edge line Lb is not overlapped at least at a portion corresponding to the first main guide line 11 and the second main guide line 21 and is shifted. This shift amount Δ corresponds to the interval W between the first main guide line 11 and the second main guide line 21. And the packaging bag 100 opened by picking the back side film 100b of the shifted portion can be opened, and the plastic fastener 50 can be easily opened.

  In this case, the first main guide wire 11 formed on the front film 100a and the second main guide wire 21 formed on the back film 100b are imaginary lines CL (see FIG. 4) extending in the tearing direction starting from the notch 30. On the other hand, since it is simply arranged on the opposite side, the interval W between the first main guide line 11 and the second main guide line 21 can be set relatively large. As a result, the amount of deviation Δ between the opening line edge La of the front film 100a corresponding to the first main guide line 11 and the opening line edge Lb of the back film 100b can be made relatively large. Therefore, after opening the packaging bag 100, the back side film 100b (see FIG. 7) in which the edge line Lb of the opening side is greatly deviated from the edge line La of the front side film 100a is opened to open the packaging bag 100, and the plastic fastener 50 is opened. Can be opened particularly easily.

  The first inclined auxiliary guiding wire 12 (121, 122, 123, 124) formed on the front film 100a and the second inclined auxiliary guiding wire 22 (221, 222, 223, 224) formed on the back film 100b overlap. (See FIGS. 4 and 6), the tearing of the front film 100a starting from the notch 30 and the tearing of the back film 100b are less time lag, and the first film 11a is connected to the first main guide wire 11 in the front film 100a. In 100b, it is guided to the second main guide wire 21 respectively. As a result, the front film 100a and the back film 100b can be torn with good balance.

  In the packaging bag 100 described above, the distance between the first main guide wire 11 and the first protruding regulation guide wire 13 formed by sandwiching the notch 30 (virtual line CL) in the front film 100a, and the notch in the back film 100b. The distance between the second main guide line 21 and the second protruding regulation guide line 23 formed with 30 (virtual line CL) in between is the same as in the above example, but is different. Also good. Further, the first protrusion restriction guide line 13 and the second protrusion restriction guide line 23 do not have to be provided. Furthermore, the number of each of the first inclined auxiliary guiding lines 12 and the second inclined auxiliary guiding lines 22 is not limited to four, and any number from one (single) to three may be five or more. Also good. Furthermore, each of the first main guide wire 11 and the second main guide wire 21 may extend from the inside of the seal portion 41 or from the inside of the seal portion 41 instead of from the edge of the seal portion 41. Alternatively, it may be up to the front of the seal portion 42 without reaching the edge of the opposed seal portion 42. Further, the first inclined auxiliary guiding line 12 may not completely reach the first main guiding line 11. Similarly, the second inclined auxiliary guiding line 22 also completely reaches the second main guiding line 21. Not necessarily.

  Further, the front side film 100a and the back side film are arranged so that the first inclined auxiliary guiding line 12 (121, 122, 123, 124) and the second inclined auxiliary guiding line 22 (221, 222, 223, 224) described above do not overlap. You may make it form in 100b. Even in this case, in the front film 100a, tearing from the notch 30 can be guided to the first main guide wire 11 via the first inclined auxiliary guide wire 12, and also in the back film 100b, The tear from the notch 30 can be guided to the second main guide line 21 via the second inclined auxiliary guide line 22.

  Furthermore, according to the packaging bag 100 described above, since the linear groove as the tear-inducing weakening line is formed in the NY layer 102 (polyamide synthetic resin layer) for securing the strength (see FIG. 5), the strength is originally secured. Even if the NY layer 102 is difficult to tear due to the nature of the above, it is easily torn in the extending direction of the tear induction weakening line while being guided by the tear induction weakening line. Further, the aluminum layer 103 adjacent to the NY layer 102 is also easily torn in the direction in which the tear induction weakening line extends in accordance with the tear induced by the tear induction line of the NY layer 102.

  Moreover, generally a stretched film has the property of being easily torn in a certain direction. In particular, since nylon (NY: polyamide synthetic resin) exhibits its properties remarkably, the NY layer 102 may be torn in a direction that is not desired during opening. As described above, by forming a tear-inducing weakening line in the NY layer 102, it is possible to ensure that the tear from the notch 30 is in the desired direction along the tear-inducing weakening line even under the influence of such properties. Can be guided to. As a result, the packaging bag 100 can be opened so that the edge line La of the opening cut opening of the front film 100a and the edge line Lb of the opening cut opening of the back film 100b are surely shifted.

  As described above, according to the packaging bag 100 in which the tear induction weakening line is formed in the NY layer 102 (polyamide synthetic resin layer), the NY layer 102 for ensuring strength and the aluminum layer 103 for shielding gas and moisture. In addition, the packaging bag 100 formed of a film (a front side film 100a and a back side film 100b) having a structure in which layers having various characteristics including a PE layer 104 as a sealant layer are laminated can be opened more easily. Become.

  In addition, tear induction weakening lines (first tear induction weakening line 10 and second tear induction weakening line 20) are formed in a region on the opposite side to the housing portion that contains the contents with the plastic fastener 50 as a boundary. Even if the tear-induced weakening line that weakens linearly in the NY layer 102 for securing the strength is formed in a wide range and the strength of the planned tearing portion is reduced by the tear-induced weakening line, Propagation is prevented, and the influence of strength reduction on the entire packaging bag 100 containing the contents can be reduced. As a result, it is possible to realize a packaging bag having good easy-openability as a packaging bag for storing contents.

  Furthermore, in the film (front film 100a, back film 100b) forming the packaging bag 100 described above, a linear groove having a depth reaching the aluminum layer 103 is formed as a tear-inducing weakening line in the NY layer 102 adjacent to the aluminum layer 103. Is formed. For this reason, when laser processing is performed, laser light irradiated from the PET layer 101 side cuts the NY layer 102 and is reflected by the aluminum layer 103, and the reflected light can be absorbed by the NY layer 102 again. Therefore, the linear groove (tear-inducing weakening line) can be formed.

  In addition, the layer structure of the film (the front side film 100a and the back side film 100b) that forms the packaging bag 100 includes an NY layer 102 for ensuring strength, an aluminum layer 103 for shielding gas and moisture, and a PE layer as a sealant layer. If the plurality of layers including 104 are arranged such that the PE layer 104 is disposed on the outermost side and the NY layer 102 and the aluminum layer 103 are adjacent to each other, the structure shown in FIGS. It is not limited to things. For example, as shown in FIG. 8, the packaging bag 100 is formed by a film (front side film 100a, back side film 100b) having a structure in which an NY layer 102 for ensuring strength is disposed between an aluminum layer 103 and a PE layer 104. be able to. In this case, the linear groove 111 can be formed as a tear-induced weakening line in the NY layer 102 by irradiating the PE layer 104 with laser light and transmitting the PE layer 104 with the laser light. In the packaging bag 100 formed of the film having such a structure, since the tear-inducing weakening line cannot be seen from the outside (PET layer 101 side), the appearance of printing applied to the PET layer 101 is impaired by the tear-inducing weakening line. It will not be.

  The number of layers constituting the film forming the packaging bag 100 is not limited to the four described above. For example, as shown in FIG. 9, the structure may be such that the NY layer 102 and the PE layer 104 are arranged outside, and the aluminum layer 103 is arranged between these layers. In this case, laser light is irradiated from the NY layer 102 side, and a linear groove 112 as a tear-inducing weakening line is formed in the NY layer 102 by the laser light.

  In the first embodiment described above, the NY layer 102 is used as a layer for securing the strength. However, the layer for securing the strength is not particularly limited as long as the layer has a property for securing the strength. For example, PBT layer made of polybutylene terephthalate, layer made of co-extruded film of polyethylene terephthalate and polybutylene terephthalate, layer made of co-extruded film of polyethylene terephthalate and nylon, made of co-extruded film of polybutylene terephthalate and nylon It may be a layer or the like. As the properties of the layer for ensuring the strength, the impact strength according to JIS P8134 is preferably 0.8J to 2.0J. If the impact strength is 0.8 J or more, it is flexible and tough, so that tearing that follows the tear-inducing weakening line is not affected by the force that tends to deviate from the tear-inducing weakening line even during tearing of opening. It becomes possible. Further, although the PE layer 104 is used as the sealant layer, the PE layer 104 is not limited to this. For example, an LLDPE layer made of linear low density polyethylene, a PP layer made of polypropylene, or the like can be used as the sealant layer. Furthermore, the layer for shielding gas and moisture is not limited to the aluminum layer 103, and may be a metal layer made of another metal foil having the property of shielding such gas and moisture.

  Next, the packaging bag 100 which concerns on the 2nd Embodiment of this invention is comprised as shown in FIG. The structure of the film forming the packaging bag 100 (the front film 100a and the back film 100b) is the same as that of the packaging bag according to the first embodiment described above (see FIG. 2). Further, linear grooves as tearing induction weakening lines (first tearing induction weakening line 10 and second tearing induction weakening line 20) are formed in the NY layer 102 of the film (front film 100a, back film 100b) constituting the packaging bag 100. The point formed is also the same as that of the packaging bag according to the first embodiment (see FIG. 5). Furthermore, the external configuration of the packaging bag 100 (seal portions 41, 42, 43, plastic fastener 50, etc.) is the same as that of the packaging bag according to the first embodiment (see FIG. 1). The packaging bag 100 according to the second embodiment is different in the configuration of the first tear induction weakening line 10 formed on the front film 100a and the second tear induction weakening line 20 formed on the back film 100b. It differs from the packaging bag 100 (refer FIGS. 1-5) which concerns on 1st Embodiment.

  As shown in FIGS. 11A, 11B, and 12 together with FIG. 10, each of the front film 100a and the back film 100b has a tear induction weakening line 10 for inducing tearing from the notch 30 provided in the seal portion 41. , 20 are formed. The first tear induction weakening line 10 formed on the front film 100a includes a first main induction line 11, a first protrusion regulation induction line 13, a first inclined auxiliary induction line 14, and three first auxiliary induction lines 15 (151). , 152, 153). In addition, the second tear induction weakening line 20 formed on the back film 100b includes a second main induction line 21, a second protruding restriction induction line 24, a second inclined auxiliary induction line 24, and three second auxiliary induction lines 25. (251, 252, 253).

  In the front-side film 100a (see FIGS. 10 and 11A), the first main guide wire 11 has a seal portion at a predetermined position below the notch 30 as in the case of the first embodiment (see FIG. 3A). It is formed so as to extend linearly from the edge of 41 to the edge of the opposing seal portion 42. The first protrusion regulation guide line 13 has the same function as the first protrusion regulation guide line 13 in the first embodiment (see FIG. 3A), and is opposite to the first main guide line 11 with respect to the notch 30. Are formed so as to extend linearly from the edge of the seal portion 41 to a predetermined position inside the seal portion 41. The first inclined auxiliary guide wire 14 is inclined in the direction away from the seal portion 41 and toward the first main guide wire 11 within the interval between the first main guide wire 11 and the first protruding regulation guide wire 13. It is formed to extend. The first inclined auxiliary guiding line 14 extends at a gentle angle compared to the first inclined auxiliary guiding line 12 (see FIG. 3A) in the first embodiment. The three first auxiliary guide lines 15 (151, 152, 153) are connected to the first inclined auxiliary guide line 14 from the edge of the seal portion 41 within the distance between the first main guide line 11 and the first protrusion regulating guide line 13. It is formed so as to extend linearly toward.

  In the back film 100b (see FIGS. 10 and 11B), the second main guide wire 21 is located at a predetermined position above the notch 30 in the same manner as in the case of the first embodiment (see FIG. 3B). Is formed so as to extend linearly from the edge of the seal portion 42 to the edge of the opposing seal portion 42. The second protrusion restriction guide line 23 having the same function as the first protrusion restriction guide line 13 described above is located at a predetermined position opposite to the second main guide line 21 with respect to the notch 30 from the edge of the seal portion 41. It is formed so as to extend linearly to a predetermined position inside the seal portion 41. The second auxiliary auxiliary guiding line 24 is inclined in the direction away from the seal portion 41 and toward the second main guiding line 21 within the interval between the second main guiding line 21 and the second protruding regulation guiding line 23. It is formed to extend. The second inclined auxiliary guiding line 24 extends at a gentle angle compared to the second inclined auxiliary guiding line 22 (see FIG. 3B) in the first embodiment. The three second auxiliary guide lines 25 (251, 252, 253) are connected to the first inclined auxiliary guide line 14 from the edge of the seal portion 41 within the interval between the second main guide line 21 and the second protrusion regulating guide line 23. It is formed so as to extend linearly toward.

  In the packaging bag 100, the first tear guide weakening line 10 formed on the front film 100a (the first main guide line 11, the first protruding regulation guide line 13, the first inclined auxiliary guide line 14, the first auxiliary guide line 15). And the second tear guide weakening line 20 (second main guide line 21, second protrusion guide line 23, second inclined auxiliary guide line 24, second auxiliary guide line 25) formed on the back film 100b. The positional relationship is as shown in FIG.

  In FIG. 12, the first main guide line 11 (solid line) and the second main guide line 21 (broken line) are opposite to the virtual line CL extending in the tearing direction starting from the notch 30, for example, on the virtual line CL. It arrange | positions so that it may become symmetrical with respect to it. Similarly, the first protrusion regulation guide line 13 (solid line) and the second protrusion regulation guide line 23 (not overlapping with the solid line representing the first main guide line 11) are also opposite to the virtual line CL. It arrange | positions so that it may become symmetrical with respect to the side, for example, virtual line CL. The first inclined auxiliary guide wire 14 (solid line) is in the direction away from the seal portion 41 within the interval W between the first main guide wire 11 (solid line) and the second main guide wire 21 (broken line), and the first It extends obliquely toward the main guide wire 11. The second inclined auxiliary guide line 24 (broken line) is in the direction away from the seal portion 41 within the interval W between the first main guide line 11 (solid line) and the second main guide line 21 (broken line), and the second It extends obliquely toward the main guide wire 21. The first inclined auxiliary guiding line 15 and the second inclined auxiliary guiding line 25 are in an overlapping positional relationship, and are inclined in opposite directions.

  The packaging bag 100 described above can be opened, for example, as shown in FIG.

  In FIG. 13, when the packaging bag 100 (the front film 100a and the back film 100b) starts to tear from the notch 30 toward the seal part 42 on the opposite side from the seal part 41, the first tear induction weakening line 10 is formed. In the front film 100a, the tearing proceeds in a direction away from the seal portion 41, and can reach, for example, the first auxiliary guide wire 152. Then, when the tear reaches the first auxiliary guide line 152, the tear is guided by the first auxiliary guide line 152 and proceeds. When tearing guided by the first auxiliary guiding line 152 reaches the first inclined auxiliary guiding line 14, the tear is guided by the first inclined auxiliary guiding line 14 and proceeds toward the first main guiding line 11. . When the tear that is guided by the first inclined auxiliary guide wire 14 reaches the first main guide wire 11l, the tear is guided to the first main guide wire 11 and the seal portion 42 on the opposite side (see FIG. 10). ) (See La in FIG. 13).

  On the other hand, in the back film 100b in which the second tear induction weakening line 20 is formed, the tear from the notch 30 can reach the second auxiliary induction line 253, for example. When the tear reaches the second auxiliary guide line 253, the tear is guided by the second auxiliary guide line 253 and proceeds. When the tear that is guided by the second auxiliary guide line 253 reaches the second inclined auxiliary guide line 24, the tear is guided by the second inclined auxiliary guide line 24 and proceeds toward the second main guide line 21. . When the tear that is guided by the second auxiliary auxiliary guide line reaches the second main guide line 21, the tear is guided by the second main guide line 21 and the opposite seal portion 42 (see FIG. 10). (See Lb in FIG. 13).

  As described above, when the tearing started from the notch 30 reaches the edge of the seal portion 42 on the opposite side in both the front film 100a and the back film 100b, the packaging bag 100 is opened. When the packaging bag 100 is opened in this manner, as shown in FIG. 14, the edge line La of the opening cut opening of the front film 100a is the first auxiliary guide line 152, the first inclined auxiliary guide line 14, and the first main guide line. 11, the edge line Lb of the unsealing opening of the back film 100 b corresponds to the second auxiliary guide line 253, the second inclined auxiliary guide line 24, and the second main guide line 21. Here, since the first main guide wire 11 and the second main guide wire 21 are formed so as not to overlap (see FIG. 12), the edge line La of the opening cut opening of the front film 100a and the opening cut opening of the back film 100b The edge line Lb of the first main guide line 11 and the second main guide line 21 do not overlap at least in a corresponding state. This shift amount Δ corresponds to the interval W between the first main guide line 11 and the second main guide line 21. And the packaging bag 100 opened by picking the back side film 100b of the shifted portion can be opened, and the plastic fastener 50 can be easily opened.

  Also in this case, as in the case of the first embodiment, the front-side film 100a in the opened packaging bag 100 is set by increasing the interval W between the first main guide wire 11 and the second main guide wire 21. The amount of deviation Δ between the edge line La of the unsealing opening and the edge line Lb of the unsealing opening of the back film 100b can be increased. Thereby, it becomes easy to open the packaging bag 100 after opening especially. Moreover, since the 1st inclination auxiliary | assistant guide wire 14 and the 2nd inclination auxiliary | assistant guide wire 24 have overlapped similarly to the case of 1st Embodiment (refer FIG. 12, FIG. 13), the front side film 100a and the back side film 100b can be torn with good balance.

  Further, the inclinations of the first and second inclined auxiliary guiding lines 14 and 24 are gentler than those of the first and second inclined auxiliary guiding lines 12 and 22 in the first embodiment. Compared to the case of the first embodiment, tearing in the direction away from the seal portion 41 can be induced with less resistance.

  In the packaging bag 100 described above, the distance between the first main guide wire 11 and the first protrusion regulating guide wire 13 formed by sandwiching the notch 30 (virtual line CL) in the front film 100a, and the notch in the back film 100b. As in the case of the first embodiment, the distance between the second main guide line 21 and the second protruding regulation guide line 23 formed with 30 (virtual line CL) in between is the same, but is different. It may be a thing. Further, the first protrusion regulation guide line 13 and the second protrusion regulation guide line 23 do not have to be provided. Furthermore, the number of each of the first inclined auxiliary guiding lines 15 and the second inclined auxiliary guiding lines 25 is not limited to a single number (one), and may be two or more. Further, as in the case of the first embodiment, each of the first main guide wire 11 and the second main guide wire 21 is not from the edge of the seal portion 41 but from the inside of the seal portion 41 or the seal. It may extend from the inner side than the part 41, or may extend to the front of the seal part 42 without reaching the edge of the opposing seal part 42. Further, the first inclined auxiliary guiding line 14 may not completely reach the first main guiding line 11. Similarly, the second inclined auxiliary guiding line 24 also completely reaches the second main guiding line 21. Not necessarily. Further, the first auxiliary guide wire 15 (151, 152, 153) and the second auxiliary guide wire 25 (251, 252, 253) are not from the edge of the seal portion 41 but from the inside of the seal portion 41 or the seal portion. It may extend from the inner side than 41, and may extend completely to the corresponding first inclined auxiliary guiding line 14 and the second auxiliary guiding line 24, or may not be completely completed. Moreover, the number of each of the 1st auxiliary | assistant induction | guidance | derivation line 15 and the 2nd auxiliary | assistant induction | guidance | derivation line 25 is not limited to three, Any may be single (one), two, and four or more. Furthermore, you may make it form in the front side film 100a and the back side film 100b so that the 1st inclination auxiliary guide line 14 and the 2nd inclination auxiliary induction line 24 may not overlap.

  Next, the packaging bag 100 which concerns on the 3rd Embodiment of this invention is comprised as shown in FIG. The packaging bag 100 according to the third embodiment is the same as that described above except for the configuration of the first tear induction weakening line 10 formed on the front film 100a and the second tear induction weakening line 20 formed on the back film 100b. This is the same as that of the first embodiment and the second embodiment.

  As shown in FIGS. 16A, 16B, and 17 together with FIG. 15, the tear-inducing weakening line 10 for inducing tearing from the notch 30 provided in the seal portion 41 is provided on each of the front film 100 a and the back film 100 b. , 20 are formed. The first tear guide weakening line 10 formed on the front film 100a includes two first main guide lines 16a and 16b, two first inclined auxiliary guide lines 17a (171a and 172a), and two second inclined auxiliary guide lines. 17b (171b, 172b) and three auxiliary guide wires 18 (181, 182, 183). The second tear induction weakening line 20 formed on the back film 100b includes two second main induction lines 26a and 26b.

  In the front film 100a (see FIGS. 15 and 16A), the two first main guide wires 16a and 16b are respectively opposite to the virtual line CL extending in the tearing direction from the notch 30, for example, with respect to the virtual line CL. Symmetrically arranged at a predetermined interval W and formed so as to extend linearly from the edge of the seal part 41 to the edge of the opposing seal part 42. The two first inclined auxiliary guide wires 17a (171a, 172a) are separated from the seal portion 41 in the interval W between the two first main guide wires 16a, 16b and the two first main guide wires 16a. , 16b of the first main guide wire 16b. The two second inclined auxiliary guide wires 17b (171b, 172b) are arranged in a direction away from the seal portion 41 within the interval W between the two first main guide wires 16a, 16b and the two first main guide wires 16a. , 16b and the other first main guiding line 16a, it extends obliquely and crosses the two first inclined auxiliary guiding lines 17a (171a, 172a). The three auxiliary guide lines 18 (181, 182 and 183) are connected to the first inclined auxiliary guide lines 17a (171a and 172a) intersecting from the edge of the seal portion 41 within the interval W between the two first main guide lines 16a and 16b. ) And the second inclined auxiliary guide wire 17b (171b, 172b).

  In the back film 100b (see FIGS. 15 and 16B), the two second main guide wires 26a and 26b are arranged on the opposite side of the notch 30 (virtual line CL) on the two first main guide wires 16a, It is arranged at a narrower interval than the interval W of 16b, and is formed to extend linearly from the edge of the seal portion 41 to the edge of the opposing seal portion 42. In the packaging bag 100, the first tear induction weakening line 10 (formed on the front film 100a of the two second main induction lines 26a, 26b (second tear induction weakening line 20) formed on the back film 100b. The relative positional relationship with respect to the first main guiding lines 16a and 16b, the first inclined auxiliary guiding line 17a, the second inclined auxiliary guiding line 17b, and the auxiliary guiding line 18) is as shown in FIG. That is, the two second main guide lines 26a and 26b (broken line) do not overlap the two first main guide lines 16a and 16b within the interval W between the two first main guide lines 16a and 16b (solid line). Be placed.

  The packaging bag 100 described above can be opened, for example, as shown in FIG.

  In FIG. 18, when the packaging bag 100 (the front film 100a and the back film 10b) starts to tear from the notch 30 toward the seal part 42 on the opposite side, the first tear induction weakening line 10 is formed. In the front film 100a, the tearing proceeds in a direction away from the seal portion 41, and can reach, for example, the auxiliary guide wire 182. When the tear reaches the auxiliary guide line 182, the tear is guided by the auxiliary guide line 182, and can reach the second inclined auxiliary guide line 171b. When the tear reaches the second inclined auxiliary guiding line 171b, the tear is guided by the second inclined auxiliary guiding line 171b and proceeds toward the first main guiding line 16a. When the tear reaches the first main guide wire 16a, the tear is guided by the first main guide wire 16a and proceeds toward the seal portion 42 (see FIG. 15) on the opposite side (see La in FIG. 18). ).

  On the other hand, in the back side film 100b in which the second tear induction weakening line 20 is formed, the tear from the notch 30 can reach the second main induction line 26a while proceeding with the tearing of the front side film 100a. When the tear reaches the second main guide line 26a, the tear is guided by the second main guide line 26a and proceeds toward the seal portion 42 (see FIG. 15) on the opposite side.

  As described above, when the tear that has started from the notch 30 reaches the seal portion 42 on the opposite side in both the front film 100a and the back film 100b, the packaging bag 100 is opened. When the packaging bag 100 is opened in this manner, as shown in FIG. 19, the edge line La of the opening cut of the front film 100a becomes the auxiliary guide line 182, the second inclined auxiliary guide line 171b, and the first main guide line 16a. Correspondingly, the edge line Lb of the unsealing opening of the back film 100b corresponds to the second main guide line 26b. Here, since the first main guide line 16a and the second main guide line 26a are formed so as not to overlap (see FIG. 17), the edge line La of the opening cut opening of the front film 100a and the opening cut opening of the back film 100b The line Lb is not overlapped at least in a portion corresponding to the first main guide line 16a and the second main guide line 26a, and is in a shifted state (shift amount Δ). And the packaging bag 100 opened by picking the front side film 100a of the shifted portion can be opened, and the plastic fastener 50 can be easily opened.

  The packaging bag 100 mentioned above can also be opened as shown in FIG.

  In FIG. 20, when the packaging bag 100 (the front film 100a and the back film 10b) starts to tear from the notch 30 toward the seal part 42 on the opposite side from the seal part 41, the first tear induction weakening line 10 is formed. In the front film 100a, the tearing proceeds in a direction away from the seal portion 41, and can reach, for example, the auxiliary guide wire 181. When the tear reaches the auxiliary guide line 181, the tear can be guided by the auxiliary guide line 181 and proceed to reach the first inclined auxiliary guide line 171 a. When the tear reaches the first inclined auxiliary guiding line 171a, the tear is guided by the first inclined auxiliary guiding line 171a and proceeds toward the first main guiding line 16b. When the tear reaches the first main guide wire 16b, the tear is guided by the first main guide wire 16b and proceeds toward the seal portion 42 (see FIG. 15) on the opposite side (see La in FIG. 20). ).

  On the other hand, in the back side film 100b in which the second tear induction weakening line 20 is formed, the tear from the notch 30 can reach the second main induction line 26a while proceeding with the tearing of the front side film 100a. When the tear reaches the second main guide wire 26a, the tear is guided by the second main guide wire 26a and proceeds toward the seal portion 42 (see FIG. 15) on the opposite side (see Lb in FIG. 20). ).

  As described above, when the tear that has started from the notch 30 reaches the seal portion 42 on the opposite side in both the front film 100a and the back film 100b, the packaging bag 100 is opened. When the packaging bag 100 is opened in this way, as shown in FIG. 21, the edge line La of the unsealing opening of the front film 100a becomes the auxiliary guide wire 181, the first inclined auxiliary guide wire 171a, and the first main guide wire 16b. Correspondingly, the edge line Lb of the unsealing opening of the back film 100b corresponds to the second main guide line 26b. Here, since the first main guide wire 16b and the second main guide wire 26a are formed so as not to overlap (see FIG. 17), the edge line La of the opening cut-off port of the front film 100a and the opening cut-off port of the back film 100b The line Lb is not overlapped at least in a portion corresponding to the first main guide line 16b and the second main guide line 26a, and is shifted (shift amount Δ). And the packaging bag 100 opened by picking the back side film 100b of the shifted portion can be opened, and the plastic fastener 50 can be easily opened.

  In addition, in the packaging bag 100 mentioned above, the number of each of the 1st inclination auxiliary | assistant guide wire 17a and the 2nd inclination auxiliary | assistant guide wire 17b is not limited to two, Even if it is a single (one), it is three or more. There may be. Further, the number of auxiliary guide wires 18 is not limited to three, and may be one (one), two, or four or more. Further, the auxiliary guide wire 18 may not be provided. Furthermore, the number of second main guide wires 26a, 26b formed on the back film 100b is not limited to two, and the number of the second main guide wires 16a, 16b formed on the front film 100a must not overlap. Three or more may be sufficient. Further, each of the two first main guide wires 16a and 16b and the two second main guide wires 26a and 26b extends not from the edge of the seal portion 41 but from inside the seal portion 41 or from the inside of the seal portion 41. It may be a thing, and the thing to the near before reaching the seal part 42 may be sufficient, without reaching the edge of the seal part 42 which opposes.

  Next, the packaging bag 100 which concerns on the 4th Embodiment of this invention is comprised as shown in FIG. The packaging bag 100 according to the fourth embodiment is the same as that of the above-described third embodiment except for the configuration of the first tear induction weakening line 10 formed on the front film 100a.

  Each of the front film 100a and the back film 100b is formed with tear induction weakening lines 10 and 20 for inducing tearing from the notch 30 provided in the seal portion 41 as shown in FIG. Yes. The first tear induction weakening line 10 formed on the front film 100a includes two first main induction lines 16a and 16b, five bending auxiliary induction lines 19 (191, 192, 193, 194, and 195) and three auxiliary inductions. Includes line 18 (181, 182, 183). On the other hand, the second tear induction weakening line 20 formed on the back film 100b includes two second main induction lines 26a and 26b, as in the case of the third embodiment (see FIGS. 16B and 17). .

  In the front film 100a (see FIGS. 22 and 23), the two first main guide wires 16a and 16b are in relation to a virtual line CL extending in the tearing direction from the notch 30 as in the case of the third embodiment. They are arranged on the opposite side, for example, symmetrically with respect to the imaginary line CL, with a predetermined interval W, and are formed so as to extend linearly from the edge of the seal part 41 to the edge of the seal part 42 facing each other. The four auxiliary bending guide wires 19 (191, 192, 193, 194, 195) are arranged in the direction away from the seal portion 41 within the interval W between the two first main guide wires 16a, 16b. It is formed in a bent shape, for example, a "<" shape, which is divided into both sides of 16b. Each of the bending auxiliary guide lines 191, 192, 193, 194, and 195 has a first position from a predetermined position within the interval W between the two first main guide lines 16 a and 16 b, for example, a predetermined position on the virtual line CL. One part that advances toward the main guide line 16a and the other that advances from the predetermined position of the virtual line CL toward the other first main guide line 16b in an opposite direction to the one part. And part of. The three auxiliary guide wires 18 (181, 182 and 183) are bent from the edge of the seal portion 41 within the interval W between the two first main guide wires 16a and 16b. 193, 194, 195).

  In the packaging bag 100, the relative positional relationship between the first tear-inducing weakening line 10 (first main guiding lines 16a and 16b, the auxiliary guiding line 18, and the bending auxiliary guiding line 19) and the second tear-inducing weakening line 20 is As shown in FIG. That is, the two second main guide lines 26a and 26b (broken lines) overlap with the two first main guide lines 16a and 16b within the interval W between the two first main guide lines 16a and 16b (solid line). Arranged without.

  The packaging bag 100 described above can be opened, for example, as shown in FIG.

  In FIG. 25, when the packaging bag 100 (the front film 100a and the back film 100b) starts to tear from the notch 30 toward the seal part 42 on the opposite side from the seal part 41, the first tear induction weakening line 10 is formed. In the front film 100a, the tearing proceeds in a direction away from the seal portion 41, and can reach, for example, the auxiliary guide wire 181. When the tear reaches the auxiliary guide line 181, the tear can be guided by the auxiliary guide line 181 and proceed to reach the bending assist guide line 191. When the tear reaches the bending assist guide line 191, the tear is guided by the bend assist guide line 191 and proceeds to the first main guide line 16a. When the tear reaches the first main guide wire 16a, the tear is guided by the first main guide wire 16a and proceeds toward the seal portion 42 (see FIG. 22) on the opposite side (see La in FIG. 25). ).

  On the other hand, in the back side film 100b in which the second tear induction weakening line 20 is formed, the tear from the notch 30 can reach the second main induction line 26a while proceeding with the tearing of the front side film 100a. When the tear reaches the second main guide line 26a, the tear is guided by the second main guide line 26a and proceeds toward the seal portion 42 (see FIG. 15) on the opposite side.

  As described above, when the tear that has started from the notch 30 reaches the seal portion 42 on the opposite side in both the front film 100a and the back film 100b, the packaging bag 100 is opened. When the packaging bag 100 is opened in this way, as shown in FIG. 26, the edge line La of the unsealing opening of the front film 100a corresponds to the auxiliary guide wire 181, the bending auxiliary guide wire 191 and the first main guide wire 16a. The edge line Lb of the unsealing opening of the back film 100b corresponds to the second main guide line 26b. Here, since the first main guide wire 16a and the second main guide wire 26a are formed so as not to overlap (see FIG. 24), the edge line La of the opening cut-off port of the front film 100a and the opening cut-off port of the back film 100b The line Lb is not overlapped at least in a portion corresponding to the first main guide line 16a and the second main guide line 26a, and is in a shifted state (shift amount Δ). And the packaging bag 100 opened by picking the front side film 100a of the shifted portion can be opened, and the plastic fastener 50 can be easily opened.

  The packaging bag 100 described above can also be opened as shown in FIG.

  In FIG. 27, when the packaging bag 100 (the front film 100a and the back film 10b) starts to tear from the notch 30 toward the seal part 42 on the opposite side from the seal part 41, the first tear induction weakening line 10 is formed. In the front film 100a, the tearing proceeds in a direction away from the seal portion 41, and can reach the auxiliary guide wire 183, for example. When the tear reaches the auxiliary guide line 183, the tear can be guided by the auxiliary guide line 183 and proceed to reach the bending assist guide line 191. When the tear reaches the bending assist guide line 191, the tear is guided by the bend assist guide line 191 and proceeds toward the first main guide line 16b. When the tear reaches the first main guide wire 16b, the tear is guided by the first main guide wire 16b and proceeds toward the seal portion 42 (see FIG. 22) on the opposite side (see La in FIG. 27). ).

  On the other hand, in the back film 100b in which the second tear induction weakening line 20 is formed, the tear from the notch 30 can reach the second main induction line 26b while proceeding with the tearing of the front film 100a. When the tear reaches the second main guide line 26b, the tear is guided to the second main guide line 26b and proceeds toward the seal portion 42 (see FIG. 22) on the opposite side (see Lb in FIG. 27). ).

  As described above, when the tear that has started from the notch 30 reaches the seal portion 42 on the opposite side in both the front film 100a and the back film 100b, the packaging bag 100 is opened. When the packaging bag 100 is opened in this manner, as shown in FIG. 28, the edge line La of the opening cut opening of the front film 100a corresponds to the auxiliary guide wire 183, the bending auxiliary guide wire 191 and the first main guide wire 16b. The edge line Lb of the unsealing opening of the back film 100b corresponds to the second main guide line 26b. Here, since the first main guide wire 16b and the second main guide wire 26b are formed so as not to overlap (see FIG. 24), the edge line La of the opening cut opening of the front film 100a and the opening cut opening of the back film 100b The line Lb is not overlapped at least in a portion corresponding to the first main guide line 16b and the second main guide line 26b, and is shifted (shift amount Δ). And the packaging bag 100 opened by picking the back side film 100b of the shifted portion can be opened, and the plastic fastener 50 can be easily opened.

  In addition, in the packaging bag 100 mentioned above, the number of the bending | flexion auxiliary | assistant guide wires 19 is not limited to five, You may be single (one), 2-4, or 6 or more. Further, the number of auxiliary guide wires 18 is not limited to three, and may be one (one), two, or four or more. Further, the auxiliary guide wire 18 may not be provided. Furthermore, the number of second main guide wires 26a, 26b formed on the back film 100b is not limited to two, and the number of the second main guide wires 16a, 16b formed on the front film 100a must not overlap. Three or more may be sufficient. Each of the two first main guide wires 16a and 16b and the two second main guide wires 26a and 26b is not from the edge of the seal portion 41, but from the inside of the seal portion 41 or from the inside of the seal portion 41. It may extend, or may be up to the front of the seal part 42 without reaching the edge of the opposed seal part 42. Furthermore, the shape of each bending auxiliary | assistant guide wire 191,192,193,194,195 is not limited to the shape shown in FIG.22, FIG.23, FIG.24. The shape of the first main guide wire 16a and the first guide wire 16a is inclined from the predetermined position within the interval W between the first main guide wires 16a and 16b toward the first main guide wire 16a. Any shape that bends and joins the one part toward the one main guide line 16b and the other part that inclines in the opposite direction may be used. For example, the shape may be a shape in which the tip portion where the one portion and the other portion are joined is slightly curved.

  In the packaging bag 100 according to each of the above-described embodiments, a tear induction weakening line (first tear induction weakening line 10, second tear induction weakening line 20) that induces tearing from the notch 30 provided in the seal portion 41. However, a notch can be provided in the seal portion 42 facing the seal portion 41 or in both the seal portion 41 and the seal portion 42. In this case, the tear induction weakening lines (the first tear induction weakening line 10 and the second tear induction weakening line 20) for inducing tearing from the seal portion 42 or the notches provided in both the seal portion 41 and the seal portion 42 are provided. It can be formed in the same manner as the packaging bag 100 according to each embodiment described above.

  Next, the packaging bag 100 which concerns on the 5th Embodiment of this invention is comprised as shown in FIG. The structure of the film (front film 100a, back film 100b) forming the packaging bag 100 is the same as that of the packaging bag according to the first embodiment described above (see FIG. 2). In addition, a tear-inducing weakening line (first tear-inducing weakening line 10, second tear-inducing weakening line 20) is applied to the NY layer 102 (polyamide synthetic resin layer) of the film (front film 100a, back film 100b) constituting the packaging bag 100. The point that the linear groove is formed is the same as that of the packaging bag (see FIG. 5) according to the first embodiment. Furthermore, the external configuration of the packaging bag 100 (seal portions 41, 42, 43, plastic fastener 50, etc.) is the same as that of the packaging bag according to the first embodiment (see FIG. 1). The packaging bag 100 according to the fifth embodiment is different in the configuration of the first tear induction weakening line 10 formed on the front film 100a and the second tear induction weakening line 20 formed on the back film 100b. It differs from the packaging bag 100 (refer FIGS. 1-5) which concerns on 1st Embodiment.

  In FIG. 29, the first tear-inducing weakening line 10 is formed on the front film 100a, and the second tear-inducing weakening line 20 is formed on the back film 100b, as in the above-described embodiments of the present invention. ing. A left notch 30a is formed in the left seal portion 41 of the packaging bag 100, and a right notch 30b is formed in the right seal portion 42 of the packaging bag 100 so as to face the left notch 30a. Each of the first tear induction weakening line 10 and the second tear induction weakening line 20 extends from the outer edge of the seal portion 41 to the outer edge of the seal portion 42 on the opposite side.

  The first tear guide weakening line 10 is formed so as to surround the first main guide line 71 (10) formed between the seal portion 41 and the seal portion 42 and the left notch 30a of the seal portion 41, and the left notch 30a. The left first auxiliary guide wire 72a (10) for guiding the tearing of the front side film 100a to the first main guide wire 71 (10) and the right notch 30b of the seal portion 42 are formed to surround the right notch 30b. The right first auxiliary guide line 72b (10) for guiding the tearing of the front film 100a to the first main guide line 71 (10) is included. Further, the second tear guide weakening line 20 is formed so as to surround the straight second main guide line 81 (20) formed between the seal portion 41 and the seal portion 42 and the left notch 30a of the seal portion 41. The second auxiliary guide wire 82a (20) for guiding the tearing of the back film 100b from the left notch 30a to the second main guide wire 81 (20) and the right notch 30b of the seal portion 42 are formed. A right second auxiliary guide wire 82b (20) for guiding tearing of the back film 100b from the right notch 30b to the second main guide wire 81 (20).

  The packaging bag 100 (the front film 100a and the back film 100b) is approximately equally divided into three regions, a first region 61, a second region 62, and a third region 63 in the tearing direction (width direction) starting from the left notch 30a. In the case of dividing, in the first region 61, the left first auxiliary guide line 72a (10) of the front side film 100a and the straight portion 711 of the first main guide line 71 (10) and the second left auxiliary guide of the back side film 100b. A set of the straight portion 811 of the line 82a (20) and the second main guide wire 81 (20) has the same shape and is formed as a first overlapping portion that overlaps each other. In the second region 62, a curved line portion 712 (first shape portion) curved so as to protrude toward the plastic fastener 50 side of the first main guide wire 71 (10) of the surface film 100a, and a second main portion of the back film 100b. The straight line portion 812 (second shape portion) of the guide wire 81 (20) is formed as a separated portion that does not overlap each other. In the third region 63, the set of the linear portion 713 of the first main guide line 71 (10) and the right first auxiliary guide line 72b (10) of the surface film 100a and the second main guide line 81 (20 of the back film 100b). ) Of the straight line portion 813 and the right second auxiliary guide 82b (20) have the same shape and are formed as second overlapping portions that overlap each other.

  In the first tear-inducing weakening line 10 and the second tear-inducing weakening line 20, a first overlapping portion corresponding to the first region 61 (left first auxiliary guiding line 72a, left second auxiliary guiding line 82a, straight line portion 711, straight line) The length of the portion 811) in the tearing direction (the width of the first region 61) and the second overlapping portion corresponding to the third region 63 (the right first auxiliary guide line 72b, the right second auxiliary guide line 82b, and the straight portion 713, the straight portion 813) and the sum of the length in the tearing direction (the width of the third region 63) (the length of the entire overlapping portion) is a separation portion (curved line portion 712, straight line) corresponding to the second region 62. The portion 812) is longer (substantially twice as long) than the length in the tear direction (the width of the second region 62). That is, in the first tear induction weakening line 10 and the second tear induction weakening line, the length in the tearing direction of the overlapping portion (the first overlapping portion and the second overlapping portion) is longer than the length in the tearing direction of the separation portion.

  The packaging bag 100 described above can be opened, for example, as shown in FIG.

  In FIG. 30, when the packaging bag 100 (the front film 100a and the back film 100b) starts to tear from the left notch 30a toward the seal part 42 on the opposite side from the seal part 41, in the first region 61, the front film 100a When the left first auxiliary guide line 72a (10) is reached, the tearing proceeds while being guided by the left first auxiliary guide line 72a (10). When the tearing guided by the left first auxiliary guide line 72a (10) reaches the straight portion 711 of the first main guide line 71 (10), the straight line of the first main guide line 71 (10) is further increased. Proceed while being guided by part 711. At this time, when the tear on the back film 100b reaches the left second auxiliary guide line 82a (20), the tear proceeds while being guided by the left second auxiliary guide line 82a (20). When the tearing guided by the left second auxiliary guide line 82a (20) reaches the straight portion 811 of the second main guide line 81 (20), the straight line of the second main guide line 81 (20) is further reached. Proceed while being guided by part 811.

  In the first region 61, a pair of the left first auxiliary guide wire 72a (10) and the first main guide wire 71 (10) in the front film 100a and the straight second portion 711 of the first main guide wire 71 (10) and the left second auxiliary guide wire 82a ( 10) and a set of straight portions 811 of the second main guide wire 82 (10) are the first overlapping portions overlapping in the same shape. For this reason, in the tearing of the packaging bag 100 in the first region 61, the front film 100a and the back film 100b are simultaneously formed on the first overlapping portion (72a (10), 82a (20), 711, 811). While being guided, the actual tear line (see La and Lb in FIG. 30) overlaps without tearing and tears.

  When the tear of the packaging bag 100 moves from the first region 61 to the second region 62, the tear of the front film 100a moves from the straight portion 711 of the first main guide wire 71 (10) to the curved line portion 712, and the curved line. Proceed while being guided by portion 712. On the other hand, the tearing of the back film 100b continues from the straight portion 811 of the second main guide wire 81 (20) to the straight portion 812, and proceeds while being guided by the straight portion 812.

  In the second region 62, the curved line portion 712 of the first main guide wire 71 (10) in the front film 100a and the straight portion 812 of the second main guide wire 81 (20) in the back film 100b overlap with each other in different shapes. Not a separation part. For this reason, when the packaging bag 100 is torn in the second region 62, the front film 100a and the back film 100b are separated from each other (the curved line portion 712 of the first main guide wire 71 (10), the second main film 100b). While being guided by the straight portion 812) of the guide wire 81 (20), the actual tear line (see La and Lb in FIG. 30) is torn apart.

  When the tear of the packaging bag 100 moves from the second region 62 to the third region 63, the tear of the front film 100a moves from the curved line portion 712 of the first main guide wire 71 (10) to the straight portion 713, and the first Proceed while being guided by the straight portion 713 of the main guide line 71 (10). When the tear reaches the end of the straight portion 713 of the first main guide portion 71 (10), the tear further moves to the right first auxiliary guide line 72b (10), and the right first auxiliary guide. It reaches the outer edge of the seal portion 42 while being guided by the line 72b (10), or reaches the outer edge of the seal portion 42 as it is from the end of the straight portion 713 of the first main guide portion 71 (10). On the other hand, the tearing of the back film 100b continues from the straight portion 812 of the second main guide wire 81 (20) to the straight portion 813, and proceeds while being guided by the straight portion 813 of the second main guide wire 81 (20). When the tear reaches the end of the straight portion 813 of the second main guide portion 81 (20), the tear further moves to the right second auxiliary guide line 82b (20), and the right second auxiliary guide. It reaches the outer edge of the seal portion 42 while being guided by the line 82b (20), or reaches the outer edge of the seal portion 42 as it is from the end of the straight portion 813 of the second main guide portion 81 (20).

  In the third region 63, similarly to the first region 61, the straight portion 713 of the first main guide wire 71 (10) in the front film 100a and the straight portion 813 of the second main guide wire 82 (10) in the back film 100b. Are the second overlapped portions having the same shape and overlapping. For this reason, in tearing the packaging bag 100 in the third region 61, the front film 100a and the back film 100b are simultaneously guided to the second overlapping portion (713, 813) while being actually torn (FIG. 30). La and Lb in FIG. 2) are overlapped without tearing and are torn and reach the outer edge of the seal portion 42 at once.

  Thus, the tear of the packaging bag 100 started from the left notch 30a of the seal part 41 reaches the outer edge of the seal part 42 on the opposite side, whereby the packaging bag 100 is opened. When the packaging bag 100 is opened, as shown in FIG. 31, the edge line La of the opening cut opening of the front film 100a is a straight line of the left first auxiliary guide line 72a (10) and the first main guide line 71 (10). It corresponds to the portion 711, the curved line portion 712, the straight portion 713, and the right first auxiliary guide line 72b (10). Further, the edge line Lb of the unsealing opening of the back film 100b includes the left second auxiliary guide line 82a (20), the straight portions 811, 812, 813 of the second main guide line 81 (20) and the right second auxiliary guide line 82b. It comes to correspond to (20). Here, the curved line portion 712 of the first main guide line 71 (10) corresponding to the second region 62 (see FIG. 30) of the first tear induction weakening line 10 and the second tear induction weakening line 20 and the second It is formed so that the straight portion 812 of the main guide wire 81 (20) does not overlap as a separation portion. For this reason, the edge line La part of the opening cut edge of the front film 100a corresponding to the separation parts (712, 812) and the edge line Lb part of the opening cut edge of the back film 100b do not overlap with each other. The state is shifted by an amount Δ corresponding to the maximum separation distance between the curved line portion 721 of the main guide line 71 (10) and the straight line portion 812 of the second main guide line 81 (20). And the packaging bag 100 opened by picking the back side film 100b of those shifted portions can be opened, and the plastic fastener 50 can be easily opened.

  Further, in the packaging bag 100 described above, the left first auxiliary guide line 72a (10) and the first main guide line corresponding to the first region 61 of the first tear induction weakening line 10 and the second tear induction weakening line 20 are shown. A first overlapping portion in which a set of 71 (10) linear portions 711 and a set of the left second auxiliary guide line 82a (10) and the straight portion 811 of the second main guide line 82 (10) overlap, A pair of straight portions 713 of the right first auxiliary guide line 72b (10) and the first main guide line 71 (10), the right second auxiliary guide line 82b (10), and the second main guide corresponding to the three regions 63 The tear film (see La and Lb in FIGS. 30 and 31) is shifted between the front film 100a and the back film 100b in the second overlapping portion where the set of the linear portions 813 of the line 82 (10) overlaps. Torn without. For this reason, in the first overlapping portion and the second overlapping portion, the front film 100a and the back film 100b can be torn without the tearing force being dispersed. As a result, the front film 100a and the back film 100b (packaging bag 100) can be torn smoothly. In particular, the length in the tear direction of the first overlapping portion (72a, 711, 82a, 811) corresponding to the first region 61 and the second overlapping portion (72b, 713, 82b, 813) corresponding to the third region 63 is determined. Since the length of the separating portion (712, 812) corresponding to the second region 62 is longer than the length in the tearing direction, the section for smoothly tearing the front film 100a and the back film 100b is long, and as a whole, the packaging bag 100 (front film) 100a, the back film 100b) can be torn more smoothly.

  In the packaging bag 100 described above, the packaging bag 100 (the front film 100a and the back film 100b) is as described above even when tearing is started from the right notch 30b provided in the right seal portion 42. Similarly, it can be torn smoothly. Then, after being opened, as described above, the edge line La part of the opening cut edge of the front film 100a corresponding to the separation part (712, 812) and the edge line Lb of the opening cut edge of the back film 100b. The portion is not overlapped but is shifted by an amount Δ (corresponding to the maximum separation distance between the curved line portion 721 of the first tear induction weakening line 10 and the straight line portion 812 of the second tear induction weakening line 20). Therefore (see FIG. 31), the opened packaging bag 100 can be opened by picking the back side film 100b of the shifted parts, and the plastic fastener 50 can be easily opened.

  In the left first auxiliary guide line 72a (10) and the left second auxiliary guide line 82a (20), as shown in FIG. 32, the first main guide line 71a (10) and the second main guide line 81 (20). The shape of the part E connected to can be formed more smoothly. In this case, the tears guided to the left first auxiliary guide line 72a (10) and the left second auxiliary guide line 82a (20) are more smoothly performed, and the first main guide line 71 (10) and the second main guide line 81 are smoother. You can move to (20).

  The right first auxiliary guide line 72b (10) and the right second auxiliary guide line 82b (20) can also have the same shape as shown in FIG.

  Next, the packaging bag 100 which concerns on the 6th Embodiment of this invention is comprised as shown in FIG. This packaging bag 100 is different from the fifth embodiment in that the first main guide wire 71 (10) and the second main guide wire 81 (20) are formed from the left notch 30a to the right notch 30b. 29)). Note that the left notch 30a and the right notch 30b are formed so as to overlap the ends of the main guide wire 71 (10) and the main guide wire 81 (20) on the front and back sides. And the main guide line 71 (10) or the main guide line 81 (20), or the right notch 30b and the main guide line 71 (10) or the main guide line 81 (20) may not exactly overlap.

  In this packaging bag 100, tearing starting from the left notch 30a is more smoothly guided to the first main guide wire 71 (10) in the front film 100a and more smoothly to the second main guide wire 81 ( 20). In the front film 100a, tearing while being guided by the first main guide wire 71 (10 (straight portion 813)) smoothly reaches the outer edge of the seal portion 42 in which the right notch 30b is formed, and the back film 100b The tear that is guided while being guided by the second main guide line 81 (20) can smoothly reach the outer edge of the seal portion 42 in which the right notch 30b is formed, so that the packaging bag 100 (the front film 100a, the back film) can be more easily obtained. 100b) can be opened.

  Also in the packaging bag 100 according to the sixth embodiment, the first main guiding wire 71 (10) and the second main guiding wire 81 (20) after opening, similarly to the packaging bag according to the fifth embodiment. ) Of the opening cut edge of the front film 100a and the edge line Lb of the opening cut edge of the back film 100b corresponding to the separated portions (712, 812) of FIG. Therefore, it is possible to easily open the plastic fastener 50 by opening the packaging bag 100 opened by picking the back side film 100b of the shifted portion. In addition, the length in the tear direction of the first overlapping portion (72a, 711, 82a, 811) corresponding to the first region 61 and the second overlapping portion (72b, 713, 82b, 813) corresponding to the third region 63 is determined. Since the length of the separating portion (712, 812) corresponding to the second region 62 is longer than the length in the tearing direction, the section for smoothly tearing the front film 100a and the back film 100b is long, and as a whole, the packaging bag 100 (front film) 100a, the back film 100b) can be torn more smoothly.

  In the packaging bag 100, the shape of the first tear guide weakening line 10 including the left first auxiliary guide line 72a (10), the first main guide line 71 (10), and the right first auxiliary guide line 72b (10). Is not limited to those described above. For example, the separation part of the first main guide line 71 (10) corresponding to the second region 62 that does not overlap the straight part 812 of the second main guide line 81 (10) is, for example, as shown in FIG. A curved line portion 714 curved to the opposite side of the plastic fastener 50 may be used. Further, as shown in FIG. 35, the separation portion corresponding to the second region 62 includes a curved line portion 714 that curves to the opposite side of the plastic fastener 50 in the first main guide line 71 (10), and a second main guide. It may be configured by a curved line portion 814 that curves toward the plastic fastener 50 in the line 81 (20).

  However, as shown in FIG. 35, the separation portion corresponding to the second region 62 includes the first main guide line 71 (first tear guide weakening line 10) of the front film 100a and the second main guide line of the back film 100b. As shown in FIGS. 29 and 33, the first main guide line 71 and the second main guide line 71 and the second main line 81 are formed by the curved line portions 714 and 814 in which both 81 (second tear guide weakening line 20) are curved in the opposite direction. It is preferable that one of the main guide lines 81 (for example, the first main guide line 71) is a curved line portion 712 and the other (for example, the second main guide line 81) is a straight portion 812. This is because when the separating portion is continuously torn from the overlapping portion, there is little transition from the straight portion to the curved portion, and both the front film 100a and the back film 100b can be torn more smoothly. It is. Also, as shown in FIG. 34, the curved line portion 714 has a shape in which the curved line portion 714 protrudes on the side opposite to the plastic fastener 50 (the side cut off by opening), as shown in FIG. The shape which protrudes to the side (the side which is not cut off by opening) is more preferable. After opening, as shown in FIG. 31, the edge lines (La, Lb) of the opening opening of the film do not protrude as a whole and are linear, and the appearance is good. This is because the protruding cut end portion does not get in the way when the packaging bag 100 is stored. Further, in the second region 62 as the separation part, the vertical direction in which the first main guide line 71 and the second main guide line 81 are formed, because the first main guide line 71 does not include a part extending above the packaging bag 100. The range of directions can be narrowed, and the length of the packaging bag 100 in the longitudinal direction can be prevented from becoming unnecessarily long.

  Moreover, the film (front side film 100a, back side film 100b) which forms each of the packaging bag (refer FIG. 29) which concerns on the 5th Embodiment of this invention, and the packaging bag (refer FIG. 33) which concerns on 6th Embodiment. 2) is not limited to the structure shown in FIGS. 2 and 5, and may have any layer structure. Further, the tear induction weakening line (the first tear induction weakening line 10 and the second tearing induction weakening line 20) may be formed in any of the plurality of layers.

  Further, in the packaging bag according to the fifth embodiment of the present invention (see FIG. 29) and the packaging bag according to the sixth embodiment (see FIG. 33), the left first auxiliary guide wire 72a (10). In addition, both the right first auxiliary guide wire 72b (10) may be provided, and either one may be provided. Similarly, both the left second auxiliary guide line 82a (20) and the right second auxiliary guide line 82b (20) may be provided instead of both. Further, instead of providing both the two notches 30a and 30b, either one may be provided.

  By the way, the opening test after opening of the packaging bag 100 (6th Embodiment) shown in FIG. 33 was done. In this opening test, eleven monitors in their 20s to 50s have the maximum separation between the curved line portion 712 of the first tear induction weakening line 10 and the straight line portion 812 of the second tear induction weakening line 20 shown in FIG. With respect to six types of packaging bags 100 having an opening deviation amount Δ (see FIG. 31) corresponding to the distance of 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, and 5 mm, the actually opened packaging bags 100 are After picking up the hand, the portion S of the opening cut was picked and the time S until the plastic fastener 50 was opened was measured. And each monitor gave score evaluation Q in five steps about each packaging bag 100 after opening. Regarding the score Q, the score 1 (Q = 1) is “it takes time to open and feels stress”, and the score 3 (Q = 3) is “it takes time to open a little but does not feel stress” “The score 5 (Q = 5) was scored in increments of 0.5 on the basis of“ smooth and quick opening without stress ”. The result is shown in FIG. In FIG. 37, each of the opening time S and the score evaluation Q is plotted as an average value of 11 monitors. According to the result of the opening test, if the shift amount Δ is 1 mm or more and 5 mm or less, it can be evaluated that the opening is easy from the viewpoint of the opening time S and the score evaluation Q. In particular, it is more preferable that the shift amount Δ is 3 mm or more and 5 mm or less. Therefore, it is preferable that the maximum separation distance between the curved line portion 712 of the tear induction weakening line 10 and the straight line portion 812 of the second tear induction weakening line 20 is set to 1 mm or more and 5 mm or less. It is found that it is more preferable that the thickness is 3 mm or more and 5 mm or less.

  Further, an opening test was performed on the packaging bag 100 (sixth embodiment) shown in FIG. 33 under the following conditions.

(1) Configuration of Packaging Bag 100 Each of the front film 100a and the back film 100b is a laminated film of a PET layer 101, a NY layer 102 (polyamide synthetic resin layer), an aluminum layer 103, and a PE layer 104, as shown in FIG. The tear-inducing weakening lines 10 and 20 are linear grooves 110 formed in the PET layer 101 and the NY layer 102 by laser processing, as shown in FIG.
The dimensions of the packaging bag are 240 mm × 220 mm × 30 mm (width × length × folding width).
(2) Test conditions ・ Tear to the front from the left notch 30a ・ Tear to the back from the left notch 30a ・ Tear to the front from the right notch 30b ・ Tear to the back from the right notch 30b (160 bags in total).
A total of 160 bags were torn by three performers A, B, and C, respectively.
(3) NG judgment The thing which was not torn along the tear induction weakening line was set to NG.
(4) Test result In the test of the operator A, as shown in FIG. 38A, in the test of a total of 160 bags, 5 tears were NG (NG rate was 3.1%).
In the test performed by the operator B, as shown in FIG. 38B, in the test of a total of 160 bags, four tears were NG (NG rate: 2.5%).
In the test of the operator C, as shown in FIG. 38C, in the test of a total of 160 bags, four tears were NG (NG rate: 2.5%).

  Furthermore, an opening test as a comparative example was performed on the packaging bag 100 shown in FIG. 33 under the following conditions.

(1) Configuration of Packaging Bag 100 As shown in FIG. 39, the front side, which does not include the NY layer (polyamide synthetic resin layer), and has linear grooves 113 as the tear-inducing weakening lines 10 and 20 formed in the PET layer 101 About the packaging bag comprised by the film 100a and the back side film 100b, the opening test was done on condition of the following.
The size of the packaging bag is 140 mm × 195 mm (horizontal × vertical).
(2) Test conditions: Tearing forward from the right notch 30b / Tearing back from the right notch 30b The above two tears were performed for 5 bags (10 bags in total).
(3) NG judgment The thing which was not torn along the tear induction weakening line was set to NG.
(4) Test result As shown in FIG. 40, in the test of a total of 10 bags, two tears were NG (NG rate 20%).

  According to the above-described opening test (including the comparative example), the packaging bag in which the tear-inducing weakening line (linear groove by laser processing) is formed in the NY layer 102 (polyamide synthetic resin layer) has a lateral width along which the tear-inducing weakening line follows. (240 mm) is longer than that of a packaging bag (comparative example) (140 mm) in which a tear-inducing weakening line is formed on the PET layer 101, and obtains good tear performance despite being disadvantageous in terms of tear judgment conditions. You can see that The above-described opening test was performed on the packaging bag 100 having the structure shown in FIG. 33 (sixth embodiment), but the packaging bag 100 having another structure (first to fifth embodiments). It is considered that the same result can be obtained for the embodiment.

  In addition, the shape of the packaging bag 100 is not limited to the shape (substantially rectangular shape) shown by each figure, but can be made into arbitrary shapes. Moreover, it is not limited to a flat pouch, The standing pouch by which the gusset was inserted in the bottom part among the peripheral parts, and the gusset pouch by which the gusset was inserted in right and left may be sufficient.

  In addition, this invention is not limited to embodiment mentioned above and its modification. Various modifications can be made based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

  The packaging bag according to the present invention has an effect that it can be more easily opened in a packaging bag formed of a film having a structure in which a plurality of layers having various characteristics are laminated, and has an easy-opening property. Useful as a packaging bag.

DESCRIPTION OF SYMBOLS 10 1st tear induction weakening line 11 1st main induction line 12 1st inclination auxiliary induction line 13 1st protrusion regulation induction line 14 1st inclination auxiliary induction line 15 1st auxiliary induction line 16a, 16b 1st main induction line 17a, 17b First inclined auxiliary guide line 18 Auxiliary guide line 19 Bending auxiliary guide line 20 Second tear guide line 21 Second main guide line 22 Second inclined auxiliary guide line 23 Second protrusion regulating guide line 24 Second inclined auxiliary guide line 25 Second auxiliary guide line 26a, 26b Second main guide line 30 Notch 30a Left notch 30b Right notch 41, 42, 43 Seal portion 50 Plastic fastener 61 First region 62 Second region 63 Third region 71 (10) First main Guide line 72a (10) Left first auxiliary guide line 72b (10) Right first auxiliary guide line 81 (20) Second main guide line 82a (20) Left second auxiliary guide 82b (20) Right second auxiliary guide line 100 Packaging bag 100a Front side film 100b Back side film 101 PET layer 102 NY layer 103 Aluminum layer 104 PE layer 110, 111, 112 Linear groove 711 Linear portion 712 Curved line portion 713 Linear portion 811 , 812, 813 Straight line part

Claims (17)

A plurality of layers including at least a first synthetic resin layer for securing strength, a metal layer for gas shielding, and a second synthetic resin layer as a sealant layer are adjacent to the first synthetic resin layer and the metal layer. The laminated structure film is a packaging bag formed in a bag shape with the second synthetic resin layer inside,
A packaging bag in which a tear-inducing weakening line that induces tearing of the film is formed in the first synthetic resin layer of the film.   The packaging bag according to claim 1, wherein the first synthetic resin layer on which the tear-inducing weakening line is formed is a polyamide synthetic resin layer.   The packaging bag according to claim 1 or 2, wherein the tear-inducing weakening line is a linear groove formed in the first synthetic resin layer by laser processing.   The packaging bag according to claim 3, wherein the linear groove has a depth reaching a metal layer adjacent to the first synthetic resin layer.   The packaging bag according to any one of claims 1 to 4, wherein the first synthetic resin layer is disposed between the metal layer and the second synthetic resin layer.   The packaging bag according to any one of claims 1 to 4, wherein the first synthetic resin layer is disposed outside the metal layer. It is divided into two areas by openable fasteners,
An accommodating part for accommodating contents is formed in a region on one side of the fastener as a boundary,
The packaging bag according to any one of claims 1 to 6, wherein the tear-inducing weakening line is formed in a region on the other side of the fastener as a boundary. The film includes a first film and a second film,
The first film and the second film are formed in a bag shape by joining the peripheral portions of the first film and the second film with the second synthetic resin layers facing each other.
A packaging bag in which a tear start portion is formed at a joint portion formed by joining the peripheral portions of the first film and the second film,
The tear-inducing weakening line is
A first tear-inducing weakening line formed in the first film;
A second tear-inducing weakening line formed in the second film,
The first tear-inducing weakening line is
Including a first main guide wire extending in a direction away from the joint,
The second tear-inducing weakening line is
A second main guide wire that extends in a direction away from the joint portion and that is disposed on a side opposite to the first main guide line with respect to a virtual line extending in a tear direction starting from the tear start portion;
The first tear-inducing weakening line further comprises:
Including a first inclined auxiliary guiding line extending obliquely toward the first main guiding line in a direction away from the joint within the interval between the first main guiding line and the second main guiding line;
The second tear-inducing weakening line further comprises:
A second inclined auxiliary guide line extending obliquely toward the second main guide line and in a direction away from the joint within an interval between the first main guide line and the second main guide line; The packaging bag according to any one of claims 1 to 7. The first tear-inducing weakening line further comprises:
Including a first auxiliary guide line extending in a direction from the joint toward the first inclined auxiliary guide line;
The second tear-inducing weakening line further comprises:
The packaging bag of Claim 8 containing the 2nd auxiliary | assistant guide line extended in the direction which goes to the said 2nd inclination auxiliary | assistant guide line from the said junction part.   The packaging bag according to claim 8 or 9, wherein the first inclined auxiliary guiding line and the second inclined auxiliary guiding line are formed so as to overlap in a state where the first film and the second film overlap. The film includes a first film and a second film,
The first film and the second film are formed in a bag shape by joining the peripheral portions of the first film and the second film with the second synthetic resin layers facing each other.
A packaging bag in which a tear start portion is formed at a joint portion formed by joining the peripheral portions of the first film and the second film,
The tear-inducing weakening line is
A first tear-inducing weakening line formed in the first film;
A second tear-inducing weakening line formed in the second film,
The first tear-inducing weakening line is
Two first main guide wires each extending in a direction away from the joint portion and arranged on the opposite side with respect to a virtual line extending in the tear direction starting from the tear start portion;
A first inclined auxiliary guide wire extending in a direction away from the joint and obliquely toward one of the two first main guide wires;
A second inclined auxiliary guiding line extending in a direction away from the joint and obliquely toward the other of the two first main guiding lines and intersecting the first inclined auxiliary guiding line. ,
The second tear-inducing weakening line is
It is formed so as to extend in a direction away from the joint portion and to be disposed within the interval between the two first main guide lines formed in the first film without overlapping the two first main guide lines. The packaging bag according to any one of claims 1 to 7, comprising a plurality of second main guiding wires formed. The first tear-inducing weakening line further comprises:
The packaging bag according to claim 11, further comprising an auxiliary guide line extending in a direction from the joint portion toward the first inclined auxiliary guide line and the second inclined auxiliary guide line within an interval between the two first main guide lines. The film includes a first film and a second film,
The first film and the second film are formed in a bag shape by joining the peripheral portions of the first film and the second film with the second synthetic resin layers facing each other.
A packaging bag in which a tear start portion is formed at a joint portion formed by joining the peripheral portions of the first film and the second film,
The tear-inducing weakening line is
A first tear-inducing weakening line formed in the first film;
A second tear-inducing weakening line formed in the second film,
The first tear-inducing weakening line is
Two first main guide wires each extending in a direction away from the joint portion and arranged on the opposite side with respect to a virtual line extending in the tear direction starting from the tear start portion;
A bending-shaped auxiliary bending guide wire having a bent shape that is divided and directed to both of the two first main guide wires in a direction away from the joint within the interval between the two first main guide wires;
The second tear-inducing weakening line is
It extends in a direction away from the joint, and is formed so as to be disposed within the interval between the two first main guide lines formed on the first film without overlapping the two first main guide lines. The packaging bag according to claim 1, further comprising a plurality of second main guide wires. The first tear-inducing weakening line further comprises:
The packaging bag of Claim 13 which has an auxiliary | assistant guide line extended in the direction which goes to the said bending | flexion auxiliary | assistant guide line from the said junction part in the space | interval of said two 1st main guide lines. The film includes a first film and a second film,
The first film and the second film are formed in a bag shape by joining the peripheral portions of the first film and the second film with the second synthetic resin layers facing each other.
A packaging bag in which a tear start portion is formed at a joint portion formed by joining the peripheral portions of the first film and the second film,
The tear-inducing weakening line is
A first tear-inducing weakening line formed in the first film;
A second tear-inducing weakening line formed in the second film,
The first tear induction weakening line and the second tear induction weakening line are:
An overlapping portion overlapping each other in the same region extending in the tear direction, and a separating portion not overlapping each other in the same region extending in the tear direction,
The packaging bag according to any one of claims 1 to 7, wherein a length in the tearing direction of a region where the overlapping portion is formed is longer than a length in the tearing direction of a region where the separation portion is formed.   16. The packaging bag according to claim 15, wherein a maximum separation distance between the first tear-inducing weakening line portion and the second tear-inducing weakening line portion in the separation portion is 1 mm or more and 5 mm or less.   The packaging bag according to claim 15, wherein the maximum separation distance is 3 mm or more and 5 mm or less.

Images