JP6926455B2 - Easy-to-open bag and its packaging - Google Patents

Description

The present invention relates to an easily open bag and a package thereof that can be easily torn.

A conventional easy-to-open bag is disclosed in Patent Document 1. This easy-to-open bag is composed of a three-way seal bag having an opening at the upper end, and is formed by heat-bonding the peripheral edge of a laminate having a heat-adhesive resin layer on the inner surface with a peripheral seal portion. A group of scars is provided at a predetermined position on the peripheral seal portions at the left and right ends. The scar group is formed by a plurality of circular or linear piercing holes, and is tapered from the outer edge to the inner edge of the peripheral sealing portion.

The easy-open bag is sealed by heat-bonding the opening after filling the contents from the opening at the upper end. The easy-open bag with the contents sealed is torn in the left-right direction and opened. At this time, since the tear strength on the scar group is weak in the peripheral seal portion, the easy-open bag can be opened from a predetermined position where the scar group is arranged.

Japanese Unexamined Patent Publication No. 10-119984 (pages 2 to 3, Fig. 3)

However, according to the conventional easy-opening bag, since the elderly or the like cannot easily see the scar group, the opening may be started by grasping a position away from the scar group. At this time, there is a problem that the force of tearing back and forth on the outer edge of the peripheral seal portion is dispersed and the force applied to the scar group becomes small, so that opening cannot be easily started from the scar group. Therefore, an easy-opening bag that can be easily opened with a smaller force is desired.

An object of the present invention is to provide an easily open bag and a package thereof that can be easily opened.

In order to achieve the above object, the present invention is in an easy-opening bag formed of a laminate in which a heat-adhesive resin layer is arranged on the inner surface side of a base material layer, and having a peripheral seal portion on the peripheral edge of which the laminate is heat-bonded. , A group of scars composed of a plurality of linear notches extending in the left-right direction is provided at predetermined positions on the left and right ends of the peripheral edge seal portion, and the scar group is formed in a tapered shape from the outer edge to the inner edge of the peripheral edge seal portion. In addition, a first stage in which a plurality of the cuts extending from the outer edge are arranged side by side, and a second stage in which the plurality of cuts arranged in the upper and lower sides are arranged on the inner edge side of the first stage. The feature is that the length of the notch in the first stage in the left-right direction is longer than the length in the left-right direction of the notch in the second stage.

Further, the present invention is characterized in that, in the easy-opening bag having the above configuration, the scar group has a third stage in which a plurality of the cuts arranged side by side are arranged on the inner edge side of the second stage. It is said.

Further, the present invention is characterized in that, in the easy-opening bag having the above configuration, the length of the notch in the second stage in the left-right direction is equal to or longer than the length in the left-right direction of the notch in the third stage.

Further, the present invention is characterized in that, in the easy-opening bag having the above configuration, the length of the notch in the first stage in the left-right direction is 0.5 mm or more.

Further, in the easy-opening bag having the above configuration, the notch in the first stage and the notch in the second stage are arranged at different heights, and the inner end of the notch in the first stage and the second notch are arranged at different heights. It is characterized in that the outer end of the notch in the step is arranged on the same straight line parallel to the inner edge.

Further, in the easy-opening bag having the above-described configuration, the present invention is arranged so that the notch in the first stage and the notch in the second stage are arranged at different heights, and the inner end of the notch in the first stage is the second. It is characterized in that it is arranged inside the outer end of the notch in the step.

Further, the present invention relates to a packaging body of an easy-opening bag in which a plurality of easy-opening bags having each of the above configurations are stacked and bundled by an annular band member whose both ends are connected by a connecting portion. It is characterized in that the band members are arranged between them and the band members are arranged apart from each other in the vertical direction with respect to the scar group.

According to the present invention, a group of tapered scars composed of a plurality of linear cuts is arranged in a first stage extending from the outer edge of the peripheral edge seal portion and a second stage arranged on the inner edge side of the peripheral edge seal portion rather than the first stage. Has. Further, the length of the first-stage notch in the left-right direction is formed longer than the length of the second-stage notch in the left-right direction. As a result, the easy-opening bag can be easily opened with a small force.

Further, according to the packing body of the easy-opening bag of the present invention, a plurality of easy-opening bags are stacked and bundled by a band member, a connecting portion of the band member is arranged between facing peripheral seals, and the band member moves up and down with respect to the scar group. Arranged apart in the direction. As a result, the easy-opening bag can be easily bundled by connecting the connecting portions, and the easy-opening bag can be prevented from being broken due to sliding between the band member and the scar group.

Front view showing an easy-to-open bag according to the first embodiment of the present invention. Sectional drawing which shows the laminated body of the easy-opening bag of 1st Embodiment of this invention Front view showing a group of scars of an easily opened bag according to the first embodiment of the present invention. Perspective view which shows the packing body of the easy-opening bag of 1st Embodiment of this invention. Front view showing an easy-to-open bag according to a second embodiment of the present invention. Sectional drawing which shows the laminated body of the easy-opening bag of 2nd Embodiment of this invention Front view showing a group of scars of an easily opened bag according to a third embodiment of the present invention. Front view showing a group of scars of an easily opened bag according to a fourth embodiment of the present invention.

<First Embodiment>
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a front view of the easy-opening bag of the first embodiment. The easy-open bag 1 is composed of a three-way seal bag having an opening 1a at the upper end, and is used as a packaging bag for foods, medicines, and the like.

The easy-to-open bag 1 is formed by heat-bonding the three peripheral edges of the two sheets 2 formed of the laminated body 30 (see FIG. 2) by the peripheral edge sealing portion 10. A scar group 20 composed of a plurality of notches 25 is provided at a predetermined position below the upper end of the easy-opening bag 1 by a predetermined distance on the upper portion of the peripheral seal portions 10 at the left and right ends facing each other.

FIG. 2 shows a cross-sectional view of the laminated body 30 forming the sheet 2. The laminate 30 is formed by laminating the base material layer 31, the intermediate layer 32, the barrier layer 33, and the heat-adhesive resin layer 34 in this order from the outer surface side. As the base material layer 31, a biaxially stretched film such as a biaxially stretched polypropylene film, a biaxially stretched polyethylene terephthalate film, or a biaxially stretched nylon film can be used. Further, as the base material layer 31, a uniaxially stretched film in which the stretching direction is arranged in the left-right direction may be used. As a result, the tearing straightness in the left-right direction can be improved.

As the intermediate layer 32, the above-mentioned biaxially stretched films and the like can be used. The barrier layer 33 has a gas barrier property, and a metal foil such as an aluminum foil can be used.

The heat-adhesive resin layer 34 has heat-adhesive properties, and the heat-adhesive resin layers 34 of the two sheets 2 are heat-bonded to form the peripheral seal portion 10. As the heat-adhesive resin layer 34, a resin such as low-density polyethylene, medium-density polyethylene, linear low-density polyethylene, ethylene-α olephine copolymer polymerized using a single-site catalyst, ethylene-vinyl acetate copolymer, polypropylene, etc. Can be used.

The intermediate layer 32 may be omitted. Further, the barrier layer 33 may be omitted, and the base material layer 31, the intermediate layer 32, or the heat-adhesive resin layer 34 may have a gas barrier property. The film of each of the above layers can be coated with a vinylidene chloride resin, a metal such as aluminum is vapor-deposited, and an oxide such as aluminum oxide or nitrous oxide is vapor-deposited to provide gas barrier property.

FIG. 3 shows an enlarged front view of the scar group 20. The scar group 20 is formed by arranging a plurality of linear notches 25 extending in the left-right direction in a tapered shape toward the inner edge 10b of the peripheral edge sealing portion 10. The notch 25 is formed by piercing the cutting edge after heat-bonding the sheet 2 (see FIG. 1) at the peripheral edge sealing portion 10, and penetrates the peripheral edge sealing portion 10.

In the present embodiment, the scar group 20 is formed in a triangular shape (V shape). The scar group 20 may be formed in a U shape or a semicircular shape. Further, the scar group 20 may be thickened toward the inner edge 10b in the vicinity of the outer edge 10a and then tapered.

Further, the scar group 20 is divided into a plurality of stages in the left-right direction of the peripheral edge sealing portion 10, and has a first stage 21, a second stage 22, and a third stage 23 in order from the outer edge 10a side to the inner edge 10b side. .. In the first stage 21, a plurality of (four in this embodiment) notches 25 extending from the outer edge 10a of the peripheral edge seal portion 10 are arranged side by side.

The second stage 22 is arranged on the inner edge 10b side of the peripheral edge sealing portion 10 with respect to the first stage 21, and a plurality of (three in the present embodiment) notches 25 are arranged side by side in the vertical direction. The third stage 23 is arranged on the inner edge 10b side of the peripheral edge sealing portion 10 with respect to the second stage 22, and a plurality of (two in the present embodiment) notches 25 are arranged side by side in the vertical direction. The vertical spacing of each notch 25 is formed, for example, 0.5 mm to 2 mm.

The notch 25 of the first stage 21 and the notch 25 of the second stage 22 are arranged at different heights, and the notch 25 of the second stage 22 and the notch 25 of the third stage 23 are arranged at different heights. At this time, the inner end of the notch 25 in the first stage 21 and the outer end of the notch 25 in the second stage 22 are arranged on the same straight line parallel to the inner edge 10b of the peripheral edge sealing portion 10. Similarly, the inner end of the notch 25 in the second stage 22 and the outer end of the notch 25 in the third stage 23 are arranged on the same straight line parallel to the inner edge 10b of the peripheral edge sealing portion 10.

The vertical width W2 of the second stage 22 is narrower than the vertical width W1 of the first stage 21, and the vertical width W3 of the third stage 23 is narrower than the vertical width W2 of the second stage 22. ing. As a result, the scar group 20 is formed in a tapered shape.

In the present embodiment, the number of cuts 25 is reduced in the order of the first stage 21, the second stage 22, and the third stage 23, and the width W1, the width W2, and the width W3 are narrowed in order. If the scar group 20 is tapered, any two of the first stage 21, the second stage 22, and the third stage 23 may be formed by the same number of cuts 25, and the outer edge 10a side may be formed with a smaller number of cuts. It may be formed by 25.

Further, the length L1 of the notch 25 in the first stage 21 is formed longer than the length L2 of the notch 25 in the second stage 22. The length L3 of the notch 25 in the third stage 23 is formed to be the same as the length L2 of the notch 25 in the second stage 22. The length L2 of the notch 25 in the second stage 22 may be formed longer than the length L3 of the notch 25 in the third stage 23. The length of each notch 25 is formed, for example, 0.4 mm to 2 mm. The width T of the peripheral edge seal portion 10 is formed to be, for example, 5 mm to 10 mm.

The easy-to-open bag 1 having the above configuration is sealed by heat-adhering the opening 1a after filling the contents from the opening 1a at the upper end. The sealed easy-open bag 1 is opened by grasping the upper part and the lower part of the scar group 20, respectively, and applying a force in the opposite directions to the front and back, and tearing it in the left-right direction as shown by the alternate long and short dash line S (see FIG. 1). Will be done.

At this time, since the tear strength on the scar group 20 is weak in the peripheral seal portion 10, the easy-open bag 1 can be opened from a predetermined position where the scar group 20 is arranged. Further, since the scar group 20 is tapered, when the tearing direction is deviated in the vertical direction, the scar group 20 can guide the easy-open bag 1 in the left-right direction and tear the easy-open bag 1 in the left-right direction.

Further, the notch 25 of the first stage 21 of the scar group 20 extends from the outer edge of the peripheral edge sealing portion 10 and is formed longer in the left-right direction than the notch 25 of the second stage 22. When the opening is started by grasping a position away from the scar group 20, the force applied in the opposite directions in the front-rear direction is dispersed on the outer edge 10a of the peripheral seal portion 10. At this time, if the notch 25 in the first stage 21 is short, the force in the reverse direction does not act on the top and bottom of the notch 25, and the scar group 20 may not trigger the start of opening. Therefore, by forming the notch 25 of the first stage 21 to be long, it is possible to easily generate a force in the opposite direction in the front-rear direction above and below the notch 25 of the first stage 21.

At this time, if the length L1 of the notch 25 of the first stage 21 is formed longer in the left-right direction than the length L2 of the notch 25 of the second stage 22, as will be described later, the force at the time of opening the easy-open bag 1 is applied. Can be smaller.

FIG. 4 shows a perspective view of the packing body 5 when the easy-open bag 1 is conveyed. The packing body 5 is made by stacking a plurality of easy-opening bags 1 and bundling them by a band member 6. The band member 6 has a connecting portion 6a in which both ends are connected by gluing, and is formed in an annular shape. The connecting portion 6a may be connected with an adhesive tape, a stapler, or the like.

The connecting portion 6a is arranged between the peripheral seal portions 10 facing each other on the left and right sides. As a result, after stacking the easy-opening bags 1, the band members 6 can be easily connected by the connecting portion 6a and bundled. Further, the band member 6 is arranged apart from the scar group 20 in the vertical direction (the direction in which the facing peripheral seal portion 10 extends). As a result, it is possible to prevent the easily opened bag 1 from being broken from above the scar group 20 due to sliding between the band member 6 and the scar group 20 during transportation.

According to the present embodiment, the tapered scar group 20 composed of a plurality of linear notches 25 extends from the outer edge of the peripheral edge sealing portion 10 to the first step 21 and the inner edge side of the peripheral edge sealing portion 10 from the first step 21. It has a second stage 22 arranged in. Further, the left-right length L1 of the notch 25 in the first stage 21 is longer than the left-right length L2 of the notch 25 in the second stage 22. As a result, the easy-opening bag 1 can be easily opened with a small force.

Further, since the scar group 20 has the third stage 23 arranged on the inner edge side of the peripheral edge sealing portion 10 with respect to the second stage 22, the scar group 20 can be easily formed in a tapered shape.

Further, since the length L2 of the notch 25 in the second step 22 is equal to or greater than the length L3 of the notch 25 in the third step 23, a tapered scar group 20 that can be opened with a small force can be easily realized.

Further, since the length L1 of the notch 25 in the first stage 21 in the left-right direction is 0.5 mm or more, the easy-opening bag 1 in which the scar group 20 triggers the start of opening can be easily realized.

Further, the notch 25 of the first stage 21 and the notch 25 of the second stage 22 are arranged at different heights. Then, the inner end of the notch 25 in the first stage 21 and the outer end of the notch 25 in the second stage 22 are arranged on the same straight line parallel to the inner edge 10b of the peripheral edge sealing portion 10. As a result, when the tearing direction deviates from the first stage 21 in the vertical direction, it can be easily guided to the second stage 22.

Similarly, the notch 25 of the second stage 22 and the notch 25 of the third stage 23 are arranged at different heights. Then, the inner end of the notch 25 in the second stage 22 and the outer end of the notch 25 in the third stage 23 are arranged on the same straight line parallel to the inner edge 10b of the peripheral edge sealing portion 10. As a result, when the tearing direction deviates from the second stage 22 in the vertical direction, it can be easily guided to the third stage 23.

Further, in the packing body 5 in which a plurality of easy-opening bags 1 are stacked and bundled by the band member 6, the connecting portion 6a of the band member 6 is arranged between the facing peripheral seal portions 10. Therefore, the easy-opening bag 1 can be easily bundled by connecting the connecting portions 6a. Further, since the band member 6 is arranged apart from the scar group 20 in the vertical direction, it is possible to prevent the bag 1 from being easily opened due to sliding between the band member 6 and the scar group 20.

<Second Embodiment>
Next, FIG. 5 shows a front view of the easy-open bag 1 of the second embodiment. Further, FIG. 6 shows a cross-sectional view of the laminated body 30 forming the easy-to-open bag 1. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 4 are designated by the same reference numerals. In this embodiment, the cutting line 3 is provided at the same height as the scar group 20 of the easy-open bag 1. Other parts are the same as those in the first embodiment.

The cutting line 3 cuts the intermediate layer 32 and extends in the left-right direction from the vicinity of the scar group 20 on the left to the vicinity of the scar group 20 on the right. The cutting line 3 may be continuously cut between the left and right ends, or may be cut in a perforated shape. Further, the cutting line 3 may be cut entirely in the thickness direction of the intermediate layer 32, or may be half-cut in the thickness direction of the intermediate layer 32. When the intermediate layer 32 is omitted, the base material layer 31 may be half-cut to form the cutting line 3.

According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, since the cutting line 3 is provided, the easy-opening bag 1 can be opened with a smaller force.

<Third Embodiment>
Next, FIG. 7 shows an enlarged front view of the scar group 20 of the easy-open bag 1 of the third embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 4 are designated by the same reference numerals. In this embodiment, the arrangement of each notch 25 in the scar group 20 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

The notch 25 of the first stage 21 and the notch 25 of the second stage 22 of the scar group 20 are arranged at different heights, and the notch 25 of the second stage 22 and the notch 25 of the third stage 23 are arranged at different heights. Will be done. At this time, the inner end of the notch 25 in the first stage 21 is arranged inside the outer end of the notch 25 in the second stage 22. Similarly, the inner end of the notch 25 in the second stage 22 is arranged inside the outer end of the notch 25 in the third stage 23.

According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, the notch 25 of the first stage 21 and the notch 25 of the second stage 22 are arranged at different heights. Then, the inner end of the notch 25 in the first stage 21 is arranged inside the outer end of the notch 25 in the second stage 22. As a result, when the tearing direction deviates from the first stage 21 in the vertical direction, it can be more reliably guided to the second stage 22.

Similarly, the notch 25 of the second stage 22 and the notch 25 of the third stage 23 are arranged at different heights. Then, the inner end of the notch 25 of the second stage 22 is arranged inside the outer end of the notch 25 of the third stage 23. As a result, when the tearing direction deviates from the second stage 22 in the vertical direction, it can be more reliably guided to the third stage 23.

<Fourth Embodiment>
Next, FIG. 8 shows an enlarged front view of the scar group 20 of the easy-open bag 1 of the fourth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 4 are designated by the same reference numerals. In this embodiment, the arrangement of each notch 25 in the scar group 20 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

The notch 25 of the first stage 21 and the notch 25 of the second stage 22 of the scar group 20 are arranged at the same height, and the notch 25 of the second stage 22 and the notch 25 of the third stage 23 are arranged at the same height. Will be done. At this time, a predetermined gap 26 is formed between the inner end of the notch 25 in the first stage 21 and the outer end of the notch 25 in the second stage 22. Similarly, a predetermined gap 26 is formed between the inner end of the notch 25 in the second stage 22 and the outer end of the notch 25 in the third stage 23. The width of the gap 26 in the left-right direction is formed to be, for example, 0.2 mm.

According to this embodiment, the same effect as that of the first embodiment can be obtained.

In the first to fourth embodiments, the scar group 20 is provided at both the left and right ends of the easy-open bag 1, but the scar group 20 may be provided only at the left and right ends. Further, although the scar group 20 is formed in three stages, it may be formed in four or more stages. Further, the number of notches 25 in the innermost stage (third stage 23 in each of the above embodiments) of the scar group 20 may be one.

Further, the easy-opening bag 1 may be formed of a bag other than the three-way sealing bag, or one sheet 2 may be bent and the peripheral edges of two adjacent sides may be heat-bonded by the peripheral edge sealing portion 10. Further, the easy-opening bag 1 may be formed by sandwiching a bi-folded sheet forming the bottom surface at the bottom of the two sheets 2.

An example formed for evaluating the easy-opening bag 1 of each embodiment will be described below.

The first embodiment is formed by the easy-opening bag 1 of the first embodiment. The base material layer 31 of the laminate 30 is made of polyethylene terephthalate having a thickness of 12 μm. The intermediate layer 32 is made of biaxially stretched nylon (manufactured by Kohjin Film & Chemicals Co., Ltd., Bonil QC) having a thickness of 15 μm. The barrier layer 33 is made of an aluminum foil having a thickness of 7 μm. The heat-adhesive resin layer 34 is made of unstretched polypropylene (manufactured by Toray Film Processing Co., Ltd., Trefan (registered trademark) NO ZK99S) having a thickness of 60 μm. This laminated body 30 is designated as "A" in Table 1 described later.

The first stage 21 of the scar group 20 has four notches 25, and the length L1 of the notches 25 in the left-right direction is formed to 1 mm. The second stage 22 has three notches 25, and the length L2 of the notches 25 in the left-right direction is formed to be 0.75 mm. The third stage 23 has two notches 25, and the length L3 of the notches 25 in the left-right direction is formed to be 0.75 mm. Further, the width T of the peripheral edge sealing portion 10 is 5 mm.

In Example 2, the heat-adhesive resin layer 34 is different from that in Example 1, and the other parts are the same as in Example 1. The heat-adhesive resin layer 34 of the laminate 30 is made of unstretched polypropylene (manufactured by Okamoto Co., Ltd., NewExp-rt) having a thickness of 60 μm. This laminated body 30 is referred to as "B" in Table 1 described later. The heat-adhesive resin layer 34 of Example 2 contains an elastomer and has a higher viscosity than the heat-adhesive resin layer 34 of Example 1.

In the third embodiment, the layer structure of the laminated body 30 is formed into a three-layer structure in which the barrier layer 33 is omitted. The shape of the scar group 20 and the like is the same as that of the first embodiment. The base material layer 31 of the laminate 30 is made of alumina-deposited polyethylene terephthalate (IBPET-PIR, manufactured by Dai Nippon Printing Co., Ltd.) having a thickness of 12 μm. The intermediate layer 32 is made of biaxially stretched nylon (manufactured by Kohjin Film & Chemicals Co., Ltd., Bonil QC) having a thickness of 15 μm. The heat-adhesive resin layer 34 is made of unstretched polypropylene (manufactured by Toray Film Processing Co., Ltd., Trefan (registered trademark) NO ZK99S) having a thickness of 60 μm. This laminated body 30 is designated as "C" in Table 1 described later.

Example 4 is different from Example 3 in the heat-adhesive resin layer 34, and the other parts are the same as in Example 3. The heat-adhesive resin layer 34 of the laminate 30 is made of unstretched polypropylene (manufactured by Okamoto Co., Ltd., NewExp-rt) having a thickness of 60 μm. This laminated body 30 is referred to as "D" in Table 1 described later.

In Example 5, the length of the notch 25 in the scar group 20 is different from that in Example 1, and the other parts are the same as in Example 1. The left-right length L1 of the notch 25 in the first stage 21 of the scar group 20 is formed to be 2 mm. The length L2 of the notch 25 in the second stage 22 in the left-right direction is formed to be 1.81 mm. The length L3 of the notch 25 in the third stage 23 in the left-right direction is formed to be 0.75 mm.

In Example 6, the length of the notch 25 in the scar group 20 is different from that in Example 2, and the other parts are the same as in Example 2. Further, the length of the notch 25 of the scar group 20 is the same as that of the fifth embodiment.

In Example 7, the length of the notch 25 in the scar group 20 is different from that in Example 3, and the other parts are the same as in Example 3. Further, the length of the notch 25 of the scar group 20 is the same as that of the fifth embodiment.

In Example 8, the length of the notch 25 in the scar group 20 is different from that in Example 4, and the other parts are the same as in Example 4. Further, the length of the notch 25 of the scar group 20 is the same as that of the fifth embodiment.

In Example 9, the length of the notch 25 in the scar group 20 is different from that in Example 1, and the other parts are the same as in Example 1. The left-right length L1 of the notch 25 in the first stage 21 of the scar group 20 is formed to be 0.5 mm. The length L2 of the notch 25 in the second stage 22 in the left-right direction is formed to be 0.45 mm. The length L3 of the notch 25 in the third stage 23 in the left-right direction is formed to be 0.45 mm.

In Example 10, the length of the notch 25 in the scar group 20 is different from that in Example 2, and the other parts are the same as in Example 2. Further, the length of the notch 25 of the scar group 20 is the same as that of the ninth embodiment.

In Example 11, the length of the notch 25 in the scar group 20 is different from that in Example 3, and the other parts are the same as in Example 3. Further, the length of the notch 25 of the scar group 20 is the same as that of the ninth embodiment.

In Example 12, the length of the notch 25 in the scar group 20 is different from that in Example 4, and the other parts are the same as in Example 4. Further, the length of the notch 25 of the scar group 20 is the same as that of the ninth embodiment.

[Comparative Example 1]
In addition, an easy-to-open bag 1 of a comparative example was prepared for comparison. Comparative Example 1 is the same as Example 1 except that the length of the notch 25 of the scar group 20 is different from that of Example 1. The left-right length L1 of the notch 25 in the first stage 21 of the scar group 20 is formed to be 1 mm. The length L2 of the notch 25 in the second stage 22 in the left-right direction is formed to be 1 mm. The length L3 of the notch 25 in the third stage 23 in the left-right direction is formed to be 1 mm.

[Comparative Example 2]
Comparative Example 2 is the same as Example 2 except that the length of the notch 25 of the scar group 20 is different from that of Example 2. Further, the length of the notch 25 of the scar group 20 is the same as that of Comparative Example 1.

[Comparative Example 3]
In Comparative Example 3, an I notch is provided in place of the scar group 20 of Example 1. Others are the same as in Example 1. The length of the I notch in the left-right direction is formed to be 2 mm.

[Comparative Example 4]
In Comparative Example 4, an I notch is provided in place of the scar group 20 of Example 2. Others are the same as in Example 2. The length of the I notch in the left-right direction is formed to be 2 mm.

[Comparative Example 5]
In Comparative Example 5, a V notch is provided in place of the scar group 20 of Example 1. Others are the same as in Example 1. The length of the V notch in the left-right direction is formed to be 2 mm.

Table 1 shows the results of evaluation of openness, visibility, and rupture of the easy-open bag 1 of each of the above Examples and Comparative Examples.

The openness was evaluated on a scale of 5 by a sensory test by a plurality of examiners, and the strength of the tearing force at the time of opening was evaluated as 5, and the case where the strength of the tearing force was small was set to 5. The visibility was evaluated on a five-point scale as to whether or not the scar group 20 was easily visible by a sensory test by a plurality of examiners, and the most visible case was set to 5. The bag-breaking property was evaluated on a 5-point scale as to whether or not the bag was broken from the scar group 20 by applying a predetermined vibration to a predetermined number of easy-open bags 1, and the case where the bag was not broken at all was set to 5.

According to Table 1, the scar group 20 of Examples 1 to 12 has higher visibility than the I notch of Comparative Examples 3 and 4, and can be easily recognized even by an elderly person or the like. Further, in Examples 1 to 12, the tearing force at the time of opening was smaller than that in Comparative Examples 1, 2, 4 and 5, and the result of good opening property was obtained. In particular, when each Example is compared with Comparative Examples 1 and 2, the tearing force at the time of opening is increased by making the length L1 of the first stage 21 of the scar group 20 longer than the length L2 of the second stage 22. Can be made smaller.

Further, both when the length L2 of the second stage 22 is longer than the length L3 of the third stage 23 (Examples 5 to 8) and when they are the same (Examples 1 to 4, 9 to 12). The tearing force at the time of opening can be reduced.

According to the present invention, it can be used as a packaging bag for foods, drugs and the like.

1 Easy-to-open bag 2 Sheet 3 Cutting line 5 Packing body 6 Band member 6a Connecting part 10 Peripheral sealing part 10a Outer edge 10b Inner edge 20 Scar group 21 1st stage 22 2nd stage 23 3rd stage 25 Notch 26 Gap 30 Laminated body 31 Material layer 32 Intermediate layer 33 Barrier layer 34 Heat-adhesive resin layer

Claims (4)

In an easy-opening bag formed of a laminated body in which a heat-adhesive resin layer is arranged on the inner surface side of the base material layer and having a peripheral edge sealing portion on which the laminated body is heat-bonded on the peripheral edge, predetermined locations on the left and right ends of the peripheral edge sealing portion. A group of scars composed of a plurality of linear notches extending in the left-right direction is provided on the surface, and the group of scars is formed in a tapered shape from the outer edge to the inner edge of the peripheral edge seal portion, and the plurality of scars extending from above the outer edge. A first stage in which the cuts are arranged side by side, a second stage in which the plurality of cuts arranged side by side are arranged on the inner edge side of the first stage, and a plurality of stages arranged side by side in one or more. It has a third stage in which the notch is arranged on the inner edge side of the second stage, the width of the peripheral seal portion is 5 mm to 10 mm, and the length of the notch in the first stage in the left-right direction is The length of the notch in the second stage in the left-right direction is longer than the length of the notch in the second stage in the left-right direction, and the length of the notch in the second stage in the left-right direction is longer than the length of the notch in the third stage in the left-right direction. An easy-to-open bag characterized in that the length of the notch in the left-right direction is 0.4 mm to 2 mm (excluding 0.4 mm to 1 mm). The notch in the first stage and the notch in the second stage are arranged at different heights, and the inner end of the notch in the first stage and the outer end of the notch in the second stage are on the inner edge. The easy-opening bag according to claim 1, wherein the bags are arranged on the same straight line in parallel. The notch in the first stage and the notch in the second stage are arranged at different heights, and the inner end of the notch in the first stage is arranged inside the outer end of the notch in the second stage. The easy-to-open bag according to claim 1, wherein the bag is made. The packaging body of an easy-opening bag in which a plurality of easy-opening bags according to any one of claims 1 to 3 are stacked and bundled by an annular band member whose ends are connected by a connecting portion, wherein the connecting portions face each other. An easy-to-open bag packaging body arranged between peripheral seal portions, wherein the band member is arranged vertically apart from the scar group.

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