Inflation bag with tear stop function

Abstract

To provide a packaging bag with an opening notch capable of reducing contamination risk of a chip of a bag body.SOLUTION: A packaging bag with an opening notch is provided with a straight advance cut property in which a bag body 2 is torn in a straight line in a direction perpendicular to a vertical direction when the bag body 2 is opened by tearing the bag body 2 from an opening notch 5 formed on one side edge 3 of the bag body 2 toward the other side edge 4 of the bag body 2 as a starting point. A tear-stop slit 6 intersecting an imaginary tear line L extending straight from the opening notch 5 toward the other side edge 4 is formed near the other side edge 4 of the bag body 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a packaging bag with a tear notch. [Background technology]

[0002] Generally, when commercial raw materials (for example, food ingredients such as rice, flour, breadcrumbs, etc.) are delivered to processing facilities (for example, food processing factories, central kitchens, kitchens of restaurant chains, etc.), the commercial raw materials are often delivered in packaging bags made of resin film. The packaging bags delivered to the processing facility are then opened by workers at the processing facility, and the contents of the opened packaging bags are put into commercial cooking equipment or ingredient processing machines. However, if scissors or other tools are used to open the packaging bags, there is a risk that the tools will accidentally get into the commercial cooking equipment or ingredient processing machines.

[0003] Therefore, packaging bags that can be opened by hand without using tools such as scissors are known from Patent Documents 1 and 2.

[0004] As shown in FIG. 11, the packaging bags of Patent Documents 1 and 2 have a bag body 21 formed of a resin tubular film 20 extending in the vertical direction, and an opening notch 24 formed on one side edge 22 (the left side in the figure) of the side edges 22, 23 on both the left and right sides of the bag body 21.

[0005] The tubular film 20 forming the bag body 21 is a tubular inflation film composed of an outer layer mainly composed of polyethylene, a middle layer mainly composed of a cyclic olefin resin and polyethylene, and an inner layer mainly composed of polyethylene, which is formed by flattening the film so that both the left and right sides are folded in half.As a result, as shown in Figures 12 and 13, when the bag body 21 is torn from the tearing notch 24 on one side edge 22 (the left side in the figures) toward the other side edge 23 (the right side in the figures) to open it, the bag body 21 is endowed with straight-line tearing properties, such that it tears in a straight line perpendicular to the up-down direction. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 7-329991 [Patent Document 2] Utility Model Registration No. 3183912 Summary of the Invention [Problem to be solved by the invention]

[0007] Incidentally, as shown in Figure 12, when bag body 21 is torn open from tearing notch 24 on one side edge 22 (left side in the figure) toward the other side edge 23 (right side in the figure), bag body 21 is separated into a torn piece 25 and a bag body 26 at the top and bottom, as shown in Figure 13. Therefore, when a worker at a processing facility opens bag body 21 and puts the contents of the opened packaging bag into a commercial cooking appliance or ingredient processing machine, there is a risk that torn piece 25 shown in Figure 13 will accidentally get mixed into the commercial cooking appliance or ingredient processing machine.

[0008] Therefore, in order to reduce the risk of contamination with scraps 25 of bag body 21, some processing facilities are making efforts to make it a rule that after opening, the scraps 25 and bag body 26 are left behind rather than discarded, and then it is checked whether the number of scraps 25 matches the number of bag bodies 26, and the confirmation results are recorded in a daily work log, etc.

[0009] Here, when tearing open the bag body 21 shown in Figure 11 from the tearing notch 24 on the side edge 22 on one side (the left side in the figure) towards the side edge 23 on the other side (the right side in the figure), one method can be considered to prevent the torn pieces 25 from separating from the bag body 26 after opening by stopping the tearing of the bag body 21 at a position just before the bag body 21 is completely separated into the top and bottom. However, since workers at processing equipment usually have to complete many tasks in a short amount of time, when tearing open the bag body 21, they tend to tear the bag body 21 all the way to the end in one go, and it is difficult to stop the tearing midway.

[0010] The problem to be solved by this invention is to provide a packaging bag with a tear notch that can reduce the risk of pieces of the bag body getting mixed in. [Means for solving the problem]

[0011] In order to solve the above problems, the present invention provides a packaging bag with a tear notch having the following configuration. [Configuration 1] a bag body formed of a resin tubular film extending in the vertical direction and having an internal storage space for storing contents; an opening notch formed on one of the left and right side edges of the bag body, In a packaging bag with a tear notch, the bag body is given a straight cut property that causes the bag to tear straight in a direction perpendicular to the up-down direction when the bag body is torn from the tear notch toward the other of the left and right side edges of the bag body to open it, A packaging bag with an opening notch is characterized in that a tear-stop slit that intersects with an imaginary tear line that extends straight from the opening notch toward the other side edge is formed near the other side edge of the bag body.

[0012] With this configuration, the bag is torn from the opening notch on one side edge toward the other side edge, and when the tearing tip reaches the tear-stop slit, the tear-stop slit prevents further tearing and stops the bag from tearing. This makes it possible to open the bag without completely separating the top and bottom, reducing the risk of bag fragments getting mixed in.

[0013] [Configuration 2] The packaging bag with an opening notch according to configuration 1, wherein the bag body has a stopper-enclosing seal portion that separates the storage space from the tear-stop slit so that the contents in the storage space do not spill out through the tear-stop slit.

[0014] When this configuration is adopted, a stopper-enclosing seal portion that separates the storage space from the tear-stop slit is formed in the bag, so that it is possible to prevent the contents in the storage space of the bag from spilling out of the bag through the tear-stop slit before the bag is opened.

[0015] [Configuration 3] The tubular film is formed by flattening a tubular inflation film that is integrally molded without seams in the circumferential direction so that both the left and right sides are folded in half, and is composed of a front film located on the front side and a back film located on the back side, with the folded part as the boundary, the stopper-enclosing seal portion is formed so as to avoid the position of the tear-stop slit so that the front film and the back film are not adhered to each other at the position of the tear-stop slit; The packaging bag with a tear-stop notch according to configuration 2, wherein the tear-stop slit is formed through the front film and the back film, which are not bonded to each other.

[0016] When this configuration is adopted, the front and back films are not adhered to each other at the location of the tear-stop slit, and the tear-stop slit is formed through the front and back films.Therefore, when the bag is torn from the opening notch on one side edge toward the other side edge and the tip of the tear reaches the tear-stop slit, the tear-stop slit in the front film prevents further tearing of the front film, and the tear-stop slit in the back film prevents further tearing of the back film.The tear-stop action of the front film and the tear-stop action of the back film make it possible to reliably stop the tearing of the bag.

[0017] [Configuration 4] The packaging bag with a tear notch according to configuration 3, wherein the tubular film is formed from the multilayer inflation film consisting of an outer layer mainly composed of polyethylene, a middle layer mainly composed of a cyclic olefin resin and polyethylene, and an inner layer mainly composed of polyethylene.

[0018] In this way, when the bag body is torn from the opening notch on one side edge toward the other side edge to open it, it is possible to effectively impart straight cutting properties, that is, tearing in a straight line in a direction perpendicular to the up-down direction.

[0019] [Configuration 5] The packaging bag with an opening notch according to any one of configurations 2 to 4, wherein the stopper-enclosing seal portion extends in the vertical direction, intersecting the intended tear line, between the opening notch and the tear-stop slit, and the upper end of the stopper-enclosing seal portion is connected to the other side edge of the bag body above the intended tear line, and the lower end of the stopper-enclosing seal portion is connected to the other side edge of the bag body below the intended tear line.

[0020] By adopting this configuration, it is possible to reliably separate the portion of the bag where the tear-stop slit is formed from the storage space inside the bag.

[0021] [Configuration 6] The packaging bag with a tear-off notch according to configuration 5, wherein the stopper-enclosing seal portion is formed in an arc shape with a central angle of 130° or less, the chord of which is the side edge on the other side of the bag body.

[0022] When this configuration is adopted, the stopper-enclosing seal portion is flat and arc-shaped, so that after the bag is torn from the opening notch on one side edge to the tear-stop slit near the other side edge to open the bag, when the opening of the bag is turned downwards and the contents of the bag are poured into a commercial cooking appliance, ingredient processing machine, etc., the contents of the bag are less likely to get caught on the stopper-enclosing seal portion, and the contents can be poured smoothly.

[0023] [Configuration 7] A packaging bag with an opening notch according to any one of configurations 1 to 6, wherein the tear-stop slit is formed in a curved arc shape that gradually moves away from the other side edge of the bag body from the position where it intersects with the intended tear line upward and downward.

[0024] In this way, the tear-stop slit is shaped so that it gradually moves away from the other side edge of the bag body upward and downward from the position where it intersects with the intended tear line, making it easy to ensure the distance from the upper end of the tear-stop slit to the other side edge of the bag body and the distance from the lower end of the tear-stop slit to the other side edge of the bag body. Therefore, even if an unexpected force acts on the tear-stop slit part of the bag body, it is possible to prevent the bag body from tearing from the upper or lower end of the tear-stop slit to the other side edge of the bag body. [Effects of the Invention]

[0025] In the packaging bag with a tear notch of this invention, the bag body is torn from the tear notch on one side edge toward the other side edge, and when the tip of the tear reaches the tear-stop slit, the tear-stop slit prevents further tearing and stops the tearing of the bag body. Therefore, the bag body can be opened without completely separating the top and bottom, reducing the risk of bag fragments getting mixed in. [Brief explanation of the drawings]

[0026] [Figure 1] A front view of a packaging bag with an opening notch according to an embodiment of the present invention. [Figure 2] An enlarged view of the vicinity of the tear-stop notch and tear-stop slit of the packaging bag with tear-stop notch in Figure 1. [Figure 3] Cross-sectional view along line III-III in Figure 2 [Figure 4] FIG. 2 shows the state in which the bag is being torn apart starting from the tear notch shown in FIG. 1. [Figure 5]A diagram showing the state in which the tear tip of Figure 4 has reached the tear-stop notch. [Figure 6] FIG. 6 is a diagram showing a state in which the torn portion (the portion above the tear position) resulting from tearing the bag body shown in FIG. 5 and the bag body (the portion below the tear position) are arranged vertically. [Figure 7] FIG. 2 is a diagram showing a first example of the packaging bag with the opening notch shown in FIG. 1 in an unused state (before contents are placed inside); [Figure 8] FIG. 2 is a diagram showing a second example of the packaging bag with the opening notch shown in FIG. 1 in an unused state (before contents are placed inside); [Figure 9] FIG. 3 is a diagram showing a third example of the packaging bag with the opening notch shown in FIG. 1 in an unused state (before contents are placed inside). [Figure 10] FIG. 4 is a diagram showing a fourth example of the packaging bag with the opening notch shown in FIG. 1 in an unused state (before contents are placed inside). [Figure 11] Front view of a conventional packaging bag with a tear notch [Figure 12] 12 is a diagram showing a state in which the bag is being torn starting from the tear notch shown in FIG. 11. [Figure 13] FIG. 12 shows the state in which the packaging bag with the opening notch shown in FIG. 11 has been opened. DETAILED DESCRIPTION OF THE INVENTION

[0027] Fig. 1 shows a packaging bag with a tear notch according to an embodiment of the present invention (in a sealed state with contents contained therein). This packaging bag with a tear notch has a bag body 2 having an internal storage space 1 (see Fig. 3) for storing contents, a tear notch 5 formed in one side edge 3 (the left side in the figure) of both left and right side edges 3, 4 of the bag body 2, and a tear stop slit 6 formed near the side edge 4 on the other side (the right side in the figure) of the bag body 2.

[0028] The bag 2 is formed into a vertically elongated rectangle. This bag 2 is a commercial packaging bag used when delivering commercial raw materials (for example, powdered food ingredients such as rice, wheat flour, breadcrumbs, etc.) to processing facilities (for example, food processing factories, central kitchens, kitchens of restaurant chains, etc.). When no contents are contained in the bag 2, the width dimension of the bag 2 in the left-right direction is set to 25 cm or more, and the length dimension of the bag 2 in the up-down direction is set to 40 cm or more.

[0029] The bag body 2 has a resin tubular film 7 that extends in the vertical direction, a top seal portion 8 formed at the upper end of the tubular film 7, and a bottom seal portion 9 formed at the lower end of the tubular film 7. The top seal portion 8 is the portion where the upper end of the tubular film 7 is sealed by heat sealing, and the bottom seal portion 9 is the portion where the lower end of the tubular film 7 is sealed by heat sealing. A long, narrow rectangular mark 14 (a so-called phototube mark) is printed in a direction perpendicular to the vertical direction at a position a predetermined distance (e.g., 30 mm) above the lower edge of the bag body 2.

[0030] The tubular film 7 is formed by flattening a tubular inflation film that is seamlessly molded in the circumferential direction and folded in half on both the left and right sides, and is composed of a front film 10 located on the front side and a back film 11 located on the back side (see Figure 3) with the folded part as the boundary. The folded parts on both the left and right sides of the tubular film 7 form the left and right side edges 3, 4 of the bag body 2.

[0031] The blown film constituting the tubular film 7 is multilayered, consisting of an outer layer primarily composed of polyethylene, a middle layer primarily composed of a cyclic olefin resin and polyethylene, and an inner layer primarily composed of polyethylene. The polyethylene in the outer, middle, and inner layers is low-density polyethylene, and the cyclic olefin resin accounts for 50% by weight or more of the middle layer. This multilayer blown film uses polyethylene, a resin with physical properties of viscosity and elongation, for the outer and inner layers, and a cyclic olefin resin, a resin with physical properties of low viscosity and brittleness, for the middle layer. This makes it possible to impart straight-cutting properties to a blown film made of polyethylene resin, which is resistant to punctures and impacts. This blown film has two-way straight-cutting properties, allowing it to be torn straight in both the vertical direction (MD) and the direction perpendicular to the vertical direction (TD).

[0032] This straight-line cutting ability allows the bag body 2 to be torn in a straight line perpendicular to the up-down direction when opening it by starting from the tearing notch 5 on one side edge 3 (the left side in the figure) and tearing toward the other side edge 4 (the right side in the figure), as shown in Figure 4.

[0033] In this embodiment, the tubular film 7 forming the bag body 2 is exemplified as one that has two-way straight-cut properties, that is, it can be torn straight in two directions, the up-down direction (MD direction) and the direction perpendicular to the up-down direction (TD direction), but cannot be torn straight in any other direction.However, the tubular film 7 forming the bag body 2 may also be one that has one-way straight-cut properties, that is, it can be torn straight only in the direction perpendicular to the up-down direction (TD direction), but cannot be torn straight in any other direction.

[0034] 1, the top seal portion 8 is formed continuously and uninterrupted across the entire width of the bag body 2 from the side edge 3 on one side (the left side in the figure) of the bag body 2 to the side edge 4 on the other side (the right side in the figure). The top seal portion 8 is a linear portion of the upper end of the tubular film 7 that is heat-sealed (thermally welded) in a direction perpendicular to the up-down direction and has a width of 0.8 mm to 3.2 mm (preferably 2.2 mm or less).

[0035] Similarly, the bottom seal 9 is formed continuously and uninterrupted across the entire width of the bag body 2 from the side edge 3 on one side (the left side in the figure) of the bag body 2 to the side edge 4 on the other side (the right side in the figure). The bottom seal 9 is a linear portion of the lower end of the tubular film 7 that is heat-sealed in a direction perpendicular to the up-down direction, with a width of 0.8 mm to 3.2 mm (preferably 2.2 mm or less).

[0036] As shown in Fig. 2, the tearing notch 5 is a cut formed in the side edge 3 on one side (the left side in the figure) of the bag body 2, and this tearing notch 5 allows the bag body 2 to be opened by hand by tearing it from the side edge 3 on one side (the left side in the figure). The tearing notch 5 is provided in an area within 50 mm below the top seal portion 8. As shown in Fig. 3, the tearing notch 5 is formed so as to penetrate the front film 10 and the back film 11.

[0037] As shown in Figure 2, the tear-stop slit 6 is a slit that extends so as to intersect with an imaginary tear line L (an imaginary straight line perpendicular to the up-down direction) that extends in a straight line from the opening notch 5 toward the side edge 4 on the other side (the right side in the figure). The tear-stop slit 6 is formed away from the side edge 4 on the other side (the right side in the figure) of the bag body 2 to one side (the left side in the figure) so as not to overlap the side edge 4 on the other side (the right side in the figure) of the bag body 2. The tear-stop slit 6 is positioned so that the entire slit is contained within an area within 20 mm toward one side (the left side in the figure) from the side edge 4 on the other side (the right side in the figure) of the bag body 2.

[0038] The tear-stop slit 6 is formed in an arc-like shape that curves upward and downward from the position where it intersects with the intended tear line L, gradually moving away from the side edge 4 on the other side (the right side in the figure) of the bag body 2. The tear-stop slit 6 may have any other shape as long as it is a slit that extends to intersect with the intended tear line L. For example, it is also possible to use a slit that is formed in a straight line that extends upward and downward from the position where it intersects with the intended tear line L. The tear-stop slit 6 is formed so as to penetrate through the front film 10 and the back film 11, as shown in FIG. 3 .

[0039] As shown in Fig. 2, a notch-surrounding seal 12 is formed around the tear notch 5 of the bag body 2 to separate the storage space 1 (see Fig. 3) from the tear notch 5 so that the contents stored in the storage space 1 do not spill out from the tear notch 5. The notch-surrounding seal 12 is a linear portion where the front film 10 and the back film 11 (see Fig. 3) are heat-sealed together, extending so as to surround the tear notch 5, with a width of 0.8 mm or more and 2.2 mm or less.

[0040] The notch-surrounding seal portion 12 is formed in an arc shape with a central angle of 130° or less, with the chord of the arc being the side edge 3 on one side (the left side in the figure) of the bag body 2. Here, the notch-surrounding seal portion 12 extends in the vertical direction, intersecting the intended tear line L between the opening notch 5 and the tear-stop slit 6, with the upper end of the notch-surrounding seal portion 12 connected to the side edge 3 on one side (the left side in the figure) of the bag body 2 above the intended tear line L, and the lower end of the notch-surrounding seal portion 12 connected to the side edge 3 on one side (the left side in the figure) of the bag body 2 below the intended tear line L.

[0041] Additionally, a stopper-enclosing seal 13 is formed around the tear-stop slit 6 of the bag body 2 to separate the storage space 1 (see Figure 3) of the bag body 2 from the tear-stop slit 6, so that the contents stored in the storage space 1 and the tear-stop slit 6 do not spill out. The stopper-enclosing seal 13 is a linear portion where the front film 10 and the back film 11 (see Figure 3) are heat-sealed together, extending so as to surround the tear-stop slit 6, with a width of 0.8 mm or more and 2.2 mm or less.

[0042] The stopper-enclosing seal portion 13 is formed to avoid the position of the tear-stop slit 6 so that the front film 10 and the back film 11 (see FIG. 3) are not adhered to each other at the position of the tear-stop slit 6. The tear-stop slit 6 is formed in the part of the front film 10 and the back film 11 that is not adhered to each other.

[0043] The stopper-enclosing seal portion 13 is formed in an arc shape with a central angle of 130° or less, with the side edge 4 on the other side (the right side in the figure) of the bag body 2 as the chord of the arc. Here, the stopper-enclosing seal portion 13 extends in the vertical direction, intersecting the intended tear line L between the opening notch 5 and the tear-stop slit 6, with the upper end of the stopper-enclosing seal portion 13 connected to the side edge 4 on the other side (the right side in the figure) of the bag body 2 above the intended tear line L, and the lower end of the stopper-enclosing seal portion 13 connected to the side edge 4 on the other side (the right side in the figure) of the bag body 2 below the intended tear line L.

[0044] This packaging bag with a tear notch is used to contain raw materials (such as rice) for commercial use, and is delivered in that state to a processing facility (such as a central kitchen) where it is opened by workers at the processing facility. This opening operation is performed by tearing the bag 2 starting from the tear notch 5 on one side edge 3 (the left side in the figure) of the bag 2 shown in FIG. 1 toward the other side edge 4 (the right side in the figure). As shown in FIG. 4, the bag 2 is torn from the tear notch 5 on one side edge 3 (the left side in the figure) toward the other side edge 4 (the right side in the figure). When the tear reaches the tear-stop slit 6 as shown in FIG. 5, the tear-stop slit 6 prevents further tearing, and tearing of the bag 2 stops. Therefore, as shown in FIG. 6, the bag 2 can be opened without completely separating the top and bottom, reducing the risk of fragments of the bag 2 becoming mixed in.

[0045] In particular, in this embodiment, the tubular film 7 forming the bag body 2 is an inflation film made of a polyethylene resin, which has the physical properties of viscosity and elongation. Therefore, as shown in Figure 4, when a shear force in the thickness direction is applied to the tear tip of the bag body 2, the bag body 2 can be torn relatively easily, but as shown in Figure 5, once the tear tip of the bag body 2 reaches the tear-stop slit 6, the force applied to the tear tip of the bag body 2 becomes mainly a tensile force rather than a shear force, and the tearing of the bag body 2 no longer progresses, making it possible to effectively stop the tearing of the bag body 2.

[0046] Furthermore, as shown in Figures 2 and 3, this packaging bag with an opening notch has a stopper-enclosing seal portion 13 formed in the bag body 2 that separates the storage space 1 from the tear-stop slit 6, making it possible to prevent the contents in the storage space 1 of the bag body 2 from spilling out of the bag body 2 through the tear-stop slit 6 before the bag body 2 is opened.

[0047] As shown in Figures 2 and 3, in this packaging bag with an opening notch, the front film 10 and the back film 11 are not bonded to each other at the position of the tear-stop slit 6, and the tear-stop slit 6 is formed through the front film 10 and the back film 11. Therefore, as shown in Figure 4, when the bag body 2 is torn from the opening notch 5 on the side edge 3 on one side (the left side in the figure) toward the side edge 4 on the other side (the right side in the figure), and the tip of the tear reaches the tear-stop slit 6, as shown in Figure 5, the tear-stop slit 6 in the front film 10 prevents further tearing of the front film 10, and the tear-stop slit 6 in the back film 11 prevents further tearing of the back film 11. The tear-stopping action of the front film 10 and the tear-stopping action of the back film 11 make it possible to reliably stop the tearing of the bag body 2.

[0048] In addition, in this packaging bag with a tear notch, the tubular film 7 forming the bag body 2 is formed from the multilayer inflation film consisting of an outer layer mainly composed of polyethylene, a middle layer mainly composed of a cyclic olefin resin and polyethylene, and an inner layer mainly composed of polyethylene.Therefore, as shown in Figure 4, when the bag body 2 is torn and opened from the tear notch 5 on one side edge 3 (left side in the figure) toward the other side edge 4 (right side in the figure), it is possible to effectively impart straight-line tearing properties, that is, tearing in a straight line in a direction perpendicular to the up-down direction.

[0049] Furthermore, as shown in FIG. 1, this packaging bag with an opening notch has both the notch-enclosing seal portion 12 and the stopper-enclosing seal portion 13 in a flat arc shape. Therefore, after the bag body 2 is torn from the opening notch 5 on the side edge 3 on one side (the left side in the figure) to the tear-stop slit 6 near the side edge 4 on the other side (the right side in the figure) to open the bag body 2, when the opening of the bag body 2 is turned downward and the contents of the bag body 2 are poured into a commercial cooking appliance, ingredient processing machine, etc., the contents of the bag body 2 are not likely to get caught on the stopper-enclosing seal portion 13, and the contents can be poured smoothly.

[0050] 2, this packaging bag with an opening notch has a shape in which the tear-stop slit 6 gradually moves away from the side edge 4 on the other side (the right side in the figure) of the bag body 2 upward and downward from the position where it intersects with the intended tear line L, making it easy to ensure the distance from the upper end of the tear-stop slit 6 to the side edge 4 on the other side (the right side in the figure) of the bag body 2 and the distance from the lower end of the tear-stop slit 6 to the side edge 4 on the other side (the right side in the figure) of the bag body 2. Therefore, even if an unexpected force acts on the tear-stop slit 6 portion of the bag body 2, it is possible to prevent the bag body 2 from tearing from the upper or lower end of the tear-stop slit 6 to the side edge 4 on the other side (the right side in the figure) of the bag body 2.

[0051] 7 to 10 show examples of the packaging pouch with an opening notch of the above embodiment in an unused state (that is, before any contents are placed inside).

[0052] Figure 7 shows a packaging bag with a tear notch in the state of a single bag, in which only the top seal portion 8 of the top seal portion 8 and bottom seal portion 9 of the bag body 2 shown in Figure 1 has been formed in advance. A user who performs packaging using this packaging bag with a tear notch sets the bag body 2 in the state of a single bag shown in Figure 7 in a filling and packaging machine (not shown), holds the bag body 2 in the filling and packaging machine with the top seal portion 8 facing downwards, fills the contents, and then forms the bottom seal portion 9. This results in the packaging bag with a tear notch in the state shown in Figure 1.

[0053] Figure 8 shows a packaging bag with a tear notch in the state of a single bag, in which only the bottom seal 9 has been formed in advance out of the top seal 8 and bottom seal 9 of the bag body 2 shown in Figure 1. A user who performs packaging using this packaging bag with a tear notch sets the bag body 2 in the state of a single bag shown in Figure 8 in a filling and packaging machine, holds the bag body 2 in the filling and packaging machine with the bottom seal 9 facing downwards, fills the contents, and then forms the top seal 8. This results in the packaging bag with a tear notch in the state shown in Figure 1.

[0054] FIG. 9 shows a packaging bag with a tear notch in the form of a continuous bag in which multiple bags are connected in series, and in which neither the top seal 8 nor the bottom seal 9 shown in FIG. 1 is formed. This packaging bag with a tear notch is delivered to the user in a rolled-up state. The user then sets the bag body 2 (wound into a roll) in the continuous bag state shown in FIG. 9 in a filling and packaging machine, and the filling and packaging machine cuts the continuous bag unwound from the roll into individual bags at the positions indicated by the chain lines in the figure, while simultaneously forming the bottom seal 9 of the bag body 2. At this time, the cutting of the continuous bag and the formation of the bottom seal 9 are performed using the position of mark 14 (the so-called photocell mark) as a reference. Next, the bag body 2 in the single bag state is held with the bottom seal 9 facing downwards, and the contents are filled, and then the top seal 8 is formed. This results in the packaging bag with a tear notch in the state shown in FIG. 1.

[0055] FIG. 10 shows a packaging bag with a tear notch in the form of a continuous bag in which multiple bags are connected in series, with only the top seal 8 of the top and bottom seals 8 and 9 shown in FIG. 1 already formed. This packaging bag with a tear notch is also delivered to the user in a rolled-up state. The user then sets the bag body 2 (wound up in a roll) in the continuous bag state shown in FIG. 10 in a filling and packaging machine, and the filling and packaging machine cuts the continuous bag unwound from the roll into individual bags at the positions indicated by the chain lines in the figure. At this time, the continuous bag is cut based on the position of mark 14 (the so-called photocell mark). Next, the bag body 2 in the single bag state is held with the top seal 8 facing downwards and filled with the contents, after which the bottom seal 9 is formed. This results in the packaging bag with a tear notch in the state shown in FIG. 1. In FIG. 10, only the top seal portion 8 out of the top seal portion 8 and bottom seal portion 9 shown in FIG. 1 is formed in advance, but only the bottom seal portion 9 may be formed in advance. [Explanation of symbols]

[0056] 1. Containment space 2 bags 3 Side edge on one side 4 Other side edge 5 Opening notch 6 Tear stop notch 7. Cylindrical film 10 Front film 11 Back film 13 Stopper surrounding seal L Tear line

Claims

1. a bag body (2) formed of a resin tubular film (7) extending in the vertical direction and having an internal storage space (1) for storing contents; and an opening notch (5) formed on one of the side edges (3) of the left and right side edges (3, 4) of the bag body (2), The cylindrical film (7) is formed by flattening a cylindrical inflation film of a polyethylene-based resin that is integrally molded without seams in the circumferential direction, with both the left and right sides folded in half. The upper and lower ends of the cylindrical film (7) are sealed with linear heat seals having a width of 0.8 mm to 2.2 mm, In a packaging bag with a tear notch, the bag body (2) is endowed with a straight tear property that allows the bag body (2) to tear straight in a direction perpendicular to the up-down direction when the bag body (2) is opened by tearing the bag body (2) from the tear notch (5) toward the other side edge (4) of the left and right side edges (3, 4) of the bag body (2), A tear-stop slit (6) intersecting an imaginary tear line (L) extending straight from the opening notch (5) toward the other side edge (4) is formed at a position spaced apart from the other side edge (4) of the bag body (2) to one side so as not to overlap the other side edge (4) of the bag body (2); The tear-stop slit (6) is formed in a curved arc shape so as to gradually move away from the other side edge (4) of the bag body (2) upward and downward from the position where it intersects with the intended tear line (L), The bag body (2) is formed with a stopper-enclosing seal portion (13) that separates the storage space (1) from the tear-stop slit (6) so that the contents in the storage space (1) do not spill out through the tear-stop slit (6), The stopper-enclosing seal portion (13) is a linear heat-sealed portion having a width of 0.8 mm to 2.2 mm, extending so as to surround the tear-stop slit (6), The stopper-enclosing seal portion (13) extends vertically, intersecting the intended tear line (L) between the opening notch (5) and the tear-stop slit (6), and is formed so that the upper end of the stopper-enclosing seal portion (13) connects to the other side edge (4) of the bag body (2) above the intended tear line (L), and the lower end of the stopper-enclosing seal portion (13) connects to the other side edge (4) of the bag body (2) below the intended tear line (L).

2. The cylindrical film (7) is composed of a front film (10) located on the front side and a back film (11) located on the back side, with the folded portions on both the left and right sides as boundaries. The stopper-enclosing seal portion (13) is formed so as to avoid the position of the tear-stop slit (6) so that the front film (10) and the back film (11) are not adhered to each other at the position of the tear-stop slit (6), 2. The inflation bag with tear-stop function according to claim 1, wherein the tear-stop slit (6) is formed through the front film (10) and the back film (11), which are not bonded to each other.

3. 3. The inflation bag with tear stop function according to claim 2, wherein the tubular film (7) is formed from a multi-layer inflation film consisting of an outer layer primarily composed of polyethylene, an intermediate layer primarily composed of a cyclic olefin resin and polyethylene, and an inner layer primarily composed of polyethylene.

4. 4. An inflation bag with a tear stop function according to claim 1, wherein the stopper-enclosing seal portion (13) is formed in an arc shape with a central angle of 130° or less, with the other side edge (4) of the bag body (2) as the chord of the arc.

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