Inflation bag with tearing 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] This invention relates to a packaging bag with an opening notch.

Background Art

[0002] Generally, when business-use raw materials (such as food materials like rice, wheat flour, and bread flour) are delivered to a processing facility (such as a food processing factory, a central kitchen, or the kitchen of a restaurant chain), the business-use raw materials are often delivered in a state of being contained in a packaging bag formed of a resin film. After that, the packaging bag delivered to the processing facility is opened by an operator at the processing facility, and the contents of the opened packaging bag are put into business-use cooking appliances or raw material processing machines. However, when opening the packaging bag, if an opening tool such as scissors is used for opening, there is a risk that the tool may accidentally get mixed into the business-use cooking appliances or raw material processing machines.

[0003] Therefore, as packaging bags that enable opening by hand without using tools such as scissors, those of Patent Documents 1 and 2 are known.

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

[0005] The tubular film 20 forming the bag body 21 is formed by flattening a tubular inflation film composed of an outer layer mainly made of polyethylene, an intermediate layer mainly made of a cyclic olefin-based resin and polyethylene, and an inner layer mainly made of polyethylene so that both left and right sides are folded in half. Thus, as shown in FIGS. 12 and 13, when the bag body 21 is torn and opened from the opening notch 24 of the side edge 22 on one side (the left side in the figure) toward the side edge 23 on the other side (the right side in the figure), the bag body 21 is provided with a straight-cut property of being torn straight in a direction perpendicular to the vertical direction.

Prior Art Documents

Patent Document

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] By the way, as shown in FIG. 12, when the bag body 21 is torn and opened from the unsealing notch 24 on one side edge 22 (left side in the figure) toward the other side edge 23 (right side in the figure), as shown in FIG. 13, the bag body 21 is in a state of being vertically separated into a cut end 25 and a bag main body 26. Therefore, when an operator of processing equipment opens the bag body 21 and puts the contents of the opened packaging bag into a commercial cooker or a raw material processing machine, there is a risk that the cut end 25 shown in FIG. 13 will accidentally mix into the commercial cooker or the raw material processing machine.

[0008] Therefore, in order to reduce the risk of the cut end 25 of the bag body 21 being mixed in, in some processing equipment, the cut end 25 and the bag main body 26 after opening are left without being discarded, and then, a check is made as to whether the number of cut ends 25 and the number of bag main bodies 26 match, and efforts have also been made to standardize the process of recording the confirmation result in a work daily report or the like.

[0009] Here, when the bag body 21 shown in FIG. 11 is torn and opened from the unsealing notch 24 on one side edge 22 (left side in the figure) toward the other side edge 23 (right side in the figure), a method of preventing the cut end 25 after opening from separating from the bag main body 26 by stopping the tearing of the bag body 21 at a position immediately before the bag body 21 is completely separated vertically is also conceivable. However, usually, since an operator of processing equipment has to perform a lot of work in a short time, when tearing and opening the bag body 21, it is easy to tear the bag body 21 all the way to the end at once, and it is difficult to stop the tearing halfway.

[0010] The problem to be solved by this invention is to provide a packaging bag with an opening notch capable of reducing the risk of inclusion of the cut edge of the bag body.

Means for Solving the Problem

[0011] To solve the above problems, this invention provides a packaging bag with an opening notch having the following configuration. [Configuration 1] A bag body formed of a resin tubular film extending in the vertical direction and having an accommodation space for accommodating the contents inside, An opening notch formed on one side edge of the left and right side edges of the bag body, and having, In the packaging bag with an opening notch in which the bag body is provided with a straight-cut property that is straightly torn in a direction perpendicular to the vertical direction when the bag body is torn and opened from the opening notch toward the other side edge of the left and right side edges of the bag body, A tear stop cut that intersects a virtual planned tear line extending straight from the opening notch toward the other side edge is formed in the vicinity of the other side edge of the bag body. The packaging bag with an opening notch is characterized by this.

[0012] When this configuration is adopted, when the bag body 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 cut, further tearing is blocked by the tear stop cut and the tearing of the bag body stops. Therefore, it is possible to open the bag body without completely separating it vertically, and it is possible to reduce the risk of inclusion of the cut edge of the bag body.

[0013] [Configuration 2] The packaging bag with an opening notch according to Configuration 1, wherein a stopper surrounding seal portion is formed on the bag body to separate the accommodation space from the tear stop cut so that the contents in the accommodation space do not spill out from the tear stop cut.

[0014] When this configuration is adopted, a stopper surrounding seal portion that separates the storage space from the tear stop cut is formed in the bag body. Therefore, before opening the bag body, it is possible to prevent the contents in the storage space of the bag body from spilling out of the bag body through the tear stop cut.

[0015] [Configuration 3] The tubular film is formed by flattening a tubular inflation film integrally formed without a seam in the circumferential direction so that both the left and right sides are folded in half, and is composed of a front-side film located on the front side and a back-side film located on the back side with the folded portion as a boundary. The stopper surrounding seal portion is formed avoiding the position of the tear stop cut so that the front-side film and the back-side film are non-adhesive to each other at the position of the tear stop cut. The tear stop cut is formed through the front-side film and the back-side film that are non-adhesive to each other. The packaging bag with an opening notch according to Configuration 2.

[0016] When this configuration is adopted, the front-side film and the back-side film are non-adhesive to each other at the position of the tear stop cut, and the tear stop cut is formed through the front-side film and the back-side film. Therefore, when the bag body 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 cut, the further tearing of the front-side film is blocked by the tear stop cut of the front-side film, and the further tearing of the back-side film is blocked by the tear stop cut of the back-side film. By the tear stop action of the front-side film and the tear stop action of the back-side film, it is possible to surely stop the tearing of the bag body.

[0017] [Configuration 4] The packaging bag with an opening notch according to Configuration 3, wherein the tubular film is formed of a multilayer inflation film including an outer layer mainly composed of polyethylene, an intermediate 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 and opened from the opening notch on one side edge toward the other side edge, it is possible to effectively impart a straight-cutting property of being torn straight in a direction perpendicular to the vertical direction.

[0019] [Configuration 5] The stopper surrounding seal portion extends in the vertical direction intersecting the planned tearing line between the opening notch and the cut for stopping tearing, the upper end of the stopper surrounding seal portion is connected to the other side edge of the bag body above the planned tearing line, and the lower end of the stopper surrounding seal portion is connected to the other side edge of the bag body below the planned tearing line. The packaging bag with an opening notch according to any one of Configurations 2 to 4.

[0020] When this configuration is adopted, it is possible to surely separate the portion where the cut for stopping tearing of the bag body is formed from the accommodation space inside the bag body.

[0021] [Configuration 6] The stopper surrounding seal portion is formed in an arc shape with a central angle of 130° or less having the other side edge of the bag body as the chord of the arc. The packaging bag with an opening notch according to Configuration 5.

[0022] When this configuration is adopted, since the stopper surrounding seal portion is in a flat arc shape, after tearing the bag body from the opening notch on one side edge to the cut for stopping tearing near the other side edge to open the bag body, when the opening of the bag body is facing downward and the contents of the bag body are put into a commercial cooker, a raw material processing machine, etc., the contents of the bag body are less likely to be caught by the stopper surrounding seal portion, and it is possible to smoothly put in the contents.

[0023] [Configuration 7] A packaging bag with an opening notch as described in 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 toward the top and bottom.

[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. Effect of the Invention

[0025] In the packaging bag with opening notches of this invention, the bag body is torn from the opening notch on one side edge to 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, and the risk of pieces of the bag body getting mixed in can be reduced. [Brief description of the drawings]

[0026]

Figure 1

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Embodiments for Carrying Out the Invention

[0027] FIG. 1 shows a packaging bag with an opening notch (in the state of accommodating and sealing the contents) according to an embodiment of the present invention. This packaging bag with an opening notch has a bag body 2 having an accommodation space 1 (see FIG. 3) for accommodating the contents inside, an opening notch 5 formed on one side (the left side in the figure) of the side edges 3 and 4 on both the left and right sides of the bag body 2, and a tear stop notch 6 formed in the vicinity of the other side (the right side in the figure) of the side edge 4 of the bag body 2

[0028] The bag body 2 is formed in a vertically elongated rectangle. This bag body 2 is a business-use packaging bag used when incorporating a business-use raw material (for example, granular food materials such as rice, wheat flour, and bread flour) contained in a packaging bag into processing equipment (for example, a food processing factory, a central kitchen, a kitchen in a food and beverage chain store, etc.). When the bag body 2 contains no contents, the width dimension in the left-right direction of the bag body 2 is set to 25 cm or more, and the length dimension in the up-down direction of the bag body 2 is set to 40 cm or more.

[0029] The bag body 2 has a resin-made tubular film 7 extending in the up-down 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 a portion where the upper end of the tubular film 7 is sealed by heat sealing, and the bottom seal portion 9 is a portion where the lower end of the tubular film 7 is sealed by heat sealing. At a position a predetermined distance (for example, 30 mm) above from the lower edge of the bag body 2, a rectangular mark 14 (so-called photoelectric tube mark) elongated in a direction perpendicular to the up-down direction is printed.

[0030] The tubular film 7 is formed by flattening a tubular inflation film integrally formed without a seam in the circumferential direction so that both the left and right sides are folded in half, and is composed of a front-side film 10 located on the front side and a back-side film 11 (see FIG. 3) located on the back side with the folded-in-half portions on both the left and right sides of the tubular film 7 as a boundary. The folded-in-half portions on both the left and right sides of the tubular film 7 constitute the side edges 3 and 4 on both the left and right sides of the bag body 2.

[0031] The inflation film that constitutes the tubular film 7 is a multilayer film composed of an outer layer mainly made of polyethylene, an intermediate layer mainly made of a cyclic olefin resin and polyethylene, and an inner layer mainly made of polyethylene. Here, the polyethylene contained in the outer layer, intermediate layer, and inner layer is low-density polyethylene, and the proportion of the cyclic olefin resin in the intermediate layer is 50% by weight or more. That is, by adopting a multilayer inflation film of a polyethylene-based resin that uses polyethylene, which is a resin with stickiness and elongation as physical properties, for the outer and inner layers, and a cyclic olefin-based resin, which is a resin with less stickiness and brittleness as physical properties, for the intermediate layer, it is possible to impart straight-through cutability to the inflation film of the polyethylene-based resin that is resistant to piercing and impact. The inflation film with this configuration has two-way straight-through cutability that can be torn straight in two directions: the vertical direction (MD direction) and the direction perpendicular to the vertical direction (TD direction).

[0032] Due to this straight-through cutability, as shown in FIG. 4, when the bag body 2 is torn open by starting from the opening notch 5 on one side edge 3 (the left side in the figure) and tearing the bag body 2 toward the other side edge 4 (the right side in the figure), it can be torn straight in the direction perpendicular to the vertical direction.

[0033] In this embodiment, as the tubular film 7 forming the bag body 2, an example is given of one with two-way straight-through cutability that can be torn straight in two directions: the vertical direction (MD direction) and the direction perpendicular to the vertical direction (TD direction), and cannot be torn straight in other directions. However, as the tubular film 7 forming the bag body 2, one with one-way straight-through cutability that can be torn straight only in the direction perpendicular to the vertical direction (TD direction) and cannot be torn straight in other directions may be adopted.

[0034] As shown in Fig. 1, the top seal portion 8 is continuously formed without interruption over the entire width of the bag body 2 from the side edge 3 on one side (left side in the figure) of the bag body 2 to the side edge 4 on the other side (right side in the figure). The top seal portion 8 is a portion where the upper end portion of the tubular film 7 is heat-sealed (thermally welded) in a straight line extending straight in a direction perpendicular to the vertical direction with a width of 0.8 mm or more and 3.2 mm or less (preferably 2.2 mm or less).

[0035] Similarly, the bottom seal portion 9 is also continuously formed without interruption over the entire width of the bag body 2 from the side edge 3 on one side (left side in the figure) of the bag body 2 to the side edge 4 on the other side (right side in the figure). The bottom seal portion 9 is a portion where the lower end portion of the tubular film 7 is heat-sealed in a straight line extending straight in a direction perpendicular to the vertical direction with a width of 0.8 mm or more and 3.2 mm or less (preferably 2.2 mm or less).

[0036] As shown in Fig. 2, the opening notch 5 is a cut formed in the side edge 3 on one side (left side in the figure) of the bag body 2. Using this opening notch 5 as a trigger, it is possible to tear open the bag body 2 by hand from the side edge 3 on one side (left side in the figure). The opening notch 5 is provided in a region within 50 mm below the top seal portion 8. As shown in Fig. 3, the opening notch 5 is formed through the front film 10 and the back film 11.

[0037] As shown in Fig. 2, the tear stop cut 6 is a cut that extends so as to intersect with a virtual planned tear line L (a virtual straight line perpendicular to the vertical direction) that extends straight from the opening notch 5 toward the side edge 4 on the other side (right side in the figure). The tear stop cut 6 is formed away from the side edge 4 on the other side (right side in the figure) of the bag body 2 toward the one side (left side in the figure) so as not to reach the side edge 4 on the other side (right side in the figure) of the bag body 2. The tear stop cut 6 is arranged so that the entire cut is contained within a region within 20 mm from the side edge 4 on the other side (right side in the figure) of the bag body 2 toward the one side (left side in the figure).

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

[0039] As shown in FIG. 2, around the opening notch 5 of the bag body 2, a notch surrounding seal portion 12 is formed to separate the accommodation space 1 and the opening notch 5 so that the contents accommodated in the accommodation space 1 (see FIG. 3) do not spill out from the opening notch 5. The notch surrounding seal portion 12 is a portion where the front film 10 and the back film 11 (see FIG. 3) are heat-sealed in a linear shape that extends to surround the opening 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 having the side edge 3 on one side (left side in the figure) of the bag body 2 as the chord of the arc. Here, the notch surrounding seal portion 12 intersects the planned tear line L between the opening notch 5 and the tear stop notch 6 and extends in the vertical direction. The upper end of the notch surrounding seal portion 12 is connected to the side edge 3 on one side (left side in the figure) of the bag body 2 above the planned tear line L, and the lower end of the notch surrounding seal portion 12 is connected to the side edge 3 on one side (left side in the figure) of the bag body 2 below the planned tear line L.

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

[0042] The stopper surrounding seal portion 13 is formed avoiding the position of the tear stop cut 6 so that the front film 10 and the back film 11 (see FIG. 3) are non-adhesive to each other at the position of the tear stop cut 6. The tear stop cut 6 is formed in the portion where the front film 10 and the back film 11 are non-adhesive to each other.

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

[0044] This packaging bag with an opening notch is used to contain raw materials for business use (such as rice), and after being stored in this state and delivered to processing facilities (such as a central kitchen), it is opened by the operators of the processing facilities. This opening operation is carried out by tearing the bag body 2 from the opening notch 5 on one side edge 3 (the left side in the figure) of the bag body 2 shown in FIG. 1 towards the other side edge 4 (the right side in the figure). Here, as shown in FIG. 4, when tearing the bag body 2 from the opening notch 5 on one side edge 3 (the left side in the figure) towards the other side edge 4 (the right side in the figure), as shown in FIG. 5, when the tip of the tear reaches the tear stop cut 6, further tearing is blocked by the tear stop cut 6, and the tearing of the bag body 2 stops. Therefore, as shown in FIG. 6, it is possible to open the bag body 2 without completely separating it vertically, and it is possible to reduce the risk of the cut edges of the bag body 2 being mixed in.

[0045] In particular, in this embodiment, the tubular film 7 forming the bag body 2 is an inflation film of a polyethylene-based resin having stickiness and elongation as physical properties. Therefore, as shown in FIG. 4, when a shearing force in the thickness direction is applied to the tip of the tear of the bag body 2, the bag body 2 can be torn relatively easily. However, as shown in FIG. 5, when the tip of the tear of the bag body 2 reaches the tear stop cut 6, thereafter, the force applied to the tip of the tear of the bag body 2 is not a shearing force but mainly a tensile force, so the tearing of the bag body 2 no longer progresses, and it is possible to effectively stop the tearing of the bag body 2.

[0046] Also, as shown in FIGS. 2 and 3, in this packaging bag with an opening notch, since a stopper surrounding seal portion 13 that separates between the storage space 1 and the tear stop cut 6 is formed in the bag body 2, it is possible to prevent the contents in the storage space 1 of the bag body 2 from spilling out from the tear stop cut 6 to the outside of the bag body 2 before opening the bag body 2.

[0047] In addition, as shown in FIGS. 2 and 3, in this packaging bag with an opening notch, the front film 10 and the back film 11 are non-adhered to each other at the position of the tear-stop cut 6, and the tear-stop cut 6 is formed through the front film 10 and the back film 11. Therefore, as shown in FIG. 4, when the bag body 2 is torn from the opening notch 5 on one side edge 3 (left side in the figure) toward the other side edge 4 (right side in the figure), as shown in FIG. 5, when the tip of the tear reaches the tear-stop cut 6, the further tearing of the front film 10 is blocked by the tear-stop cut 6 of the front film 10, and the further tearing of the back film 11 is blocked by the tear-stop cut 6 of the back film 11. By the tear-stop action of the front film 10 and the tear-stop action of the back film 11, it is possible to surely stop the tearing of the bag body 2.

[0048] In addition, in this packaging bag with an opening notch, the tubular film 7 forming the bag body 2 is formed of a multilayer inflation film composed of an outer layer mainly made of polyethylene, an intermediate layer mainly made of a cyclic olefin resin and polyethylene, and an inner layer mainly made of polyethylene. Therefore, as shown in FIG. 4, when the bag body 2 is torn and opened starting from the opening 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 a straight-cut property of being torn straight in a direction perpendicular to the vertical direction.

[0049] In addition, as shown in FIG. 1, in this packaging bag with an opening notch, since both the notch-surrounding seal portion 12 and the stopper-surrounding seal portion 13 are flat arc-shaped, after the bag body 2 is torn and opened from the opening notch 5 on one side edge 3 (left side in the figure) to the tear-stop cut 6 near the other side edge 4 (right side in the figure), when the opening of the bag body 2 is turned downward and the contents of the bag body 2 are put into a commercial cooker, a raw material processing machine, etc., the contents of the bag body 2 are less likely to be caught by the stopper-surrounding seal portion 13, and it is possible to smoothly put in the contents.

[0050] Further, as shown in FIG. 2, in this packaging bag with an opening notch, the tear stop cut 6 is shaped such that it 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 the planned tear line L. Therefore, it is easy to ensure the distance from the upper end of the tear stop cut 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 cut 6 to the side edge 4 on the other side (the right side in the figure) of the bag body 2. Thus, even when an unexpected force acts on the portion of the tear stop cut 6 of the bag body 2, it is possible to prevent the situation where the bag body 2 tears from the upper end or the lower end of the tear stop cut 6 to the side edge 4 on the other side (the right side in the figure) of the bag body 2.

[0051] Examples of the packaging bag with an opening notch in the unused state (i.e., the state before containing the contents) of the above-described embodiment are shown in FIGS. 7 to 10.

[0052] FIG. 7 shows a packaging bag with an opening notch in the state of a single bag with each sheet being a single piece, in which only the top seal portion 8 of the bag body 2 shown in FIG. 1 is formed in advance. A user who packages with this packaging bag with an opening notch sets the bag body 2 in the state of a single bag shown in FIG. 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 downward, fills the contents, and then forms the bottom seal portion 9. Thereby, the packaging bag with an opening notch becomes the state shown in FIG. 1.

[0053] FIG. 8 shows a packaging bag with an opening notch in the state of a single bag with each sheet being a single piece, in which only the bottom seal portion 9 of the bag body 2 shown in FIG. 1 is formed in advance. A user who packages with this packaging bag with an opening notch sets the bag body 2 in the state of a single bag shown in FIG. 8 in a filling and packaging machine, holds the bag body 2 in the filling and packaging machine with the bottom seal portion 9 facing downward, fills the contents, and then forms the top seal portion 8. Thereby, the packaging bag with an opening notch becomes the state shown in FIG. 1.

[0054] Fig. 9 shows a packaging bag with an opening notch in the state of a continuous bag in which a plurality of bags are connected in series, and neither the top seal portion 8 nor the bottom seal portion 9 shown in Fig. 1 is formed. This packaging bag with an opening notch is provided to the user in a rolled-up state. Subsequently, the user sets the bag body 2 (rolled up) in the state of the continuous bag shown in Fig. 9 on a filling and packaging machine, and the continuous bag fed out from the roll by the filling and packaging machine is cut into single bags at the position indicated by the chain line in the figure, and at the same time, the bottom seal portion 9 of the bag body 2 is formed. At this time, the cutting of the continuous bag and the formation of the bottom seal portion 9 are performed based on the position of the mark 14 (so-called photoelectric tube mark). Subsequently, the bag body 2 in the state of a single bag is held with the bottom seal portion 9 facing downward, and the contents are filled, and then the top seal portion 8 is formed. Thereby, the packaging bag with an opening notch becomes the state shown in Fig. 1.

[0055] Fig. 10 shows a packaging bag with an opening notch in the state of a continuous bag in which a plurality of bags are connected in series, and only the top seal portion 8 among the top seal portion 8 and the bottom seal portion 9 shown in Fig. 1 is formed in advance. This packaging bag with an opening notch is also provided to the user in a rolled-up state. Subsequently, the user sets the bag body 2 (rolled up) in the state of the continuous bag shown in Fig. 10 on a filling and packaging machine, and the continuous bag fed out from the roll by the filling and packaging machine is cut into single bags at the position indicated by the chain line in the figure. At this time, the continuous bag is cut based on the position of the mark 14 (so-called photoelectric tube mark). Subsequently, the bag body 2 in the state of a single bag is held with the top seal portion 8 facing downward, and the contents are filled, and then the bottom seal portion 9 is formed. Thereby, the packaging bag with an opening notch becomes the state shown in Fig. 1. In Fig. 10, only the top seal portion 8 among the top seal portion 8 and the bottom seal portion 9 shown in Fig. 1 is illustrated as being formed in advance, but only the bottom seal portion 9 may be formed in advance.

Explanation of Signs

[0056] 1 Accommodation space 2 Bag body 3 One side edge 4 The other side edge Notch for opening Score for tear stop Cylindrical film Front film Back film Stopper surrounding seal part Tear planned line L

Claims

1. A bag body (2) formed of a resinous tubular film (7) extending in the vertical direction and having an accommodation space (1) for accommodating contents therein, and an opening notch (5) formed in one side edge (3) of the left and right side edges (3, 4) of the bag body (2), In the packaging bag with an opening notch, a straight cut property is imparted to the bag body (2) such that when the bag body (2) is torn open from the opening notch (5) toward the other side edge (4) of the left and right side edges (3, 4) of the bag body (2), it is torn straight in a direction perpendicular to the vertical direction, A tear stop cut (6) intersecting with a virtual planned tear line (L) extending straight from the opening notch (5) toward the other side edge (4) is formed in the vicinity of the other side edge (4) of the bag body (2). The packaging bag with an opening notch is characterized by this.

2. The packaging bag with an opening notch according to claim 1, wherein a stopper surrounding seal portion (13) is formed in the bag body (2) to separate the accommodation space (1) from the tear stop cut (6) so that the contents in the accommodation space (1) do not spill out from the tear stop cut (6).

3. The tubular film (7) is formed by flattening a tubular inflation film integrally formed without a seam in the circumferential direction so that the left and right sides are folded in half, and is composed of a front side film (10) located on the front side and a back side film (11) located on the back side with the folded portion as a boundary. The stopper surrounding seal portion (13) is formed avoiding the position of the tear stop cut (6) so that the front side film (10) and the back side film (11) are non - adhered to each other at the position of the tear stop cut (6). The tear stop cut (6) is formed penetrating through the front side film (10) and the back side film (11) which are non - adhered to each other. The packaging bag with an opening notch according to claim 2 is characterized by this.

4. The packaging bag with an opening notch according to claim 3, wherein the tubular film (7) is formed of a multilayer inflation film composed of an outer layer mainly made of polyethylene, an intermediate layer mainly made of a cyclic olefin - based resin and polyethylene, and an inner layer mainly made of polyethylene.

5. The stopper surrounding seal portion (13) extends in the vertical direction intersecting the planned tear line (L) between the opening notch (5) and the tear stop cut (6), and the upper end of the stopper surrounding seal portion (13) is connected to the side edge (4) on the other side of the bag body (2) above the planned tear line (L), and the lower end of the stopper surrounding seal portion (13) is connected to the side edge (4) on the other side of the bag body (2) below the planned tear line (L). The packaging bag with an opening notch according to any one of claims 2 to 4, which is formed as such.

6. The packaging bag with an opening notch according to claim 5, wherein the stopper surrounding 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 of the bag body (2) as the chord of the arc.

7. The packaging bag with an opening notch according to any one of claims 1 to 4, wherein the tear stop cut (6) is formed in an arc shape that curves gradually away from the side edge (4) on the other side of the bag body (2) upward and downward from the position intersecting the planned tear line (L).

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