WO2023090416A1 - Zipper tape, zipper-tape-equipped container, and method for preventing falsification - Google Patents

Abstract

Provided is a zipper tape comprising a first base part, a male engagement part that protrudes from the first base part, a second base part, and a female engagement part that protrudes from the second base part, wherein: the male engagement part includes first and second hook parts protruding outward; the female engagement part includes third and fourth hook parts protruding inward; the engagement parts are configured such that the first and third hook parts engage with each other, and the second and fourth hook parts also engage with each other, when the male and female engagement parts engage with each other; and the force required in order to fit the male engagement part into the female engagement part is 30-100 N/15 mm inclusive.

Description

Zipper tape, container with zipper tape, and method for preventing tampering

The present invention relates to a zipper tape, a container with a zipper tape, and a method for preventing tampering.

For example, as described in Patent Document 1, there is known a technique for preventing tampering with the contents of a container with a zipper tape by making it difficult to reopen the engaging portion of the zipper that has once been closed. . In the case of Patent Document 1, a film is interposed between the zipper tapes before enclosing the contents so that the engaging portion is not closed.

JP 2015-217980 A

In addition to the case described in Patent Document 1 above, there are cases where it is desired to prevent the engaging portion of the zipper from closing. For example, when a container with a zipper tape is transported with the engaging portion open, and then the contents are enclosed and the engaging portion is closed, it is necessary to prevent the engaging portion from closing during transportation. . In these cases, it is a complicated process to insert an additional member such as a film to prevent the engagement portion from closing, and since the film is generally made of plastic, waste plastic It is not preferable from the viewpoint of reduction.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a zipper tape, a container with a zipper tape, and a method for preventing tampering, which can prevent the engagement part from being closed by a simple structure that does not require an additional member. .

[1] A zipper tape comprising a first base, a male engaging portion projecting from the first base, a second base, and a female engaging portion projecting from the second base. wherein the male engaging portion includes first and second outwardly projecting barbs, and the female engaging portion includes third and fourth inwardly projecting barbs; When the male engaging portion is fitted inside the female engaging portion, the first hook portion and the third hook portion, and the second hook portion and the fourth hook portion are engaged. A zipper tape configured to engage with each other, wherein a force required to engage the male engaging portion and the female engaging portion is 30 N/15 mm or more and 100 N/15 mm or less.
[2] whether a barbed portion is formed at the tips of the second hook portion and the fourth hook portion, and no barb portion is formed at the tips of the first hook portion and the third hook portion; Alternatively, a return portion having a larger angle than the return portions of the second hook portion and the fourth hook portion is formed, and the fourth hook portion is positioned between the female engagement portion and the second base portion. a first rising portion that rises obliquely from the connection region to the second base; and following the first rising portion, the second rising portion is more perpendicular to the second base than the first rising portion. width of the first rising portion including a second rising portion rising at an angle, a bending portion formed following the second rising portion, and the return portion formed at the tip of the bending portion; is 0.35 mm or more, the zipper tape according to [1].
[3] The zipper tape according to [1] or [2], wherein the minimum width of the connecting region between the female engaging portion and the second base portion is 1.0 mm or more and 1.8 mm or less.
[4] whether a barbed portion is formed at the tips of the second hook and the fourth hook, and no barb is formed at the tips of the first hook and the third hook; Alternatively, a return portion having a larger angle than the return portions of the second hook portion and the fourth hook portion is formed, and the fourth hook portion is positioned between the female engagement portion and the second base portion. a first rising portion that rises obliquely from the connection region to the second base; and following the first rising portion, the second rising portion is more perpendicular to the second base than the first rising portion. a second rising portion rising at an angle; a bending portion formed following the second rising portion; and the return portion formed at a tip of the bending portion, wherein the first rising portion The zipper tape according to any one of [1] to [3], which has a length along the direction of 0.4 mm or less.
[5] The third and fourth hooks each include a rising portion rising from a connection region between the female engaging portion and the second base portion, a bent portion formed following the rising portion, and the and a return portion formed at the tip of the bent portion, and when the male engaging portion outside the bent portion is about to fit inside the female engaging portion, the first and second The zipper tape according to any one of [1] to [4], wherein the surface of the hook contacting the hook forms an angle of 145° or more on the outside of the female engaging portion.
[6] The shortest distance from the inner space of the female engaging portion between the third and fourth hooks to the surface of the second base opposite to the female engaging portion is The zipper tape according to any one of [1] to [5], which is 0.50 mm or more.
[7] In the male engaging portion, between the first and second hooks are a first inclined surface continuous to the first hook and a sloped surface continuous to the second hook. [1] to [6], wherein an angle formed by the first inclined surface and the second inclined surface on the side of the male engaging portion is 140° or more; The zipper tape according to any one of .
[8] With zipper tape, comprising: a container body; and the zipper tape according to any one of [1] to [7], wherein the first base and the second base are respectively joined to the container body container.
[9] The container with a zipper tape according to [8], wherein the container body is bag-shaped.
[10] In the zipper tape-equipped container according to [8] or [9], the force required to engage the male engaging portion and the female engaging portion is less than the force normally assumed. A method for preventing tampering, which prevents tampering with the contents of the container with the zipper tape by increasing the size of the container.

According to the above configuration, the force required to engage the male engaging portion and the female engaging portion of the zipper tape is greater than that of a general zipper tape, so that the engaging portion is closed. Hateful. As a result, it is possible to prevent the engaging portion from closing with a simple configuration that does not require an additional member.

It is sectional drawing which expanded the engaging part of the zipper tape which concerns on one Embodiment of this invention. It is sectional drawing which expanded the engaging part of a general zipper tape. 1. It is a top view of the container with a zipper tape containing the zipper tape shown in FIG.

FIG. 1 is an enlarged cross-sectional view of an engaging portion of a zipper tape according to one embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of an engaging portion of a general zipper tape for comparison. The zipper tape 10 shown in FIG. and joint portion 13B. The male engaging portion 13A includes hooks 151 and 152 projecting outward. More specifically, the hook portions 151 and 152 include a common rising portion 15A rising from the first base portion 11 and protruding portions 151B and 152B protruding from the rising portion 15A to both sides. The projecting portion 152B includes a return portion 152B2 formed at the tip.

On the other hand, the female engaging portion 13B includes hook portions 153 and 154 protruding inward. More specifically, the hook portion 153 includes a raised portion 153A that rises from the second base portion 12 and a protruding portion 153B that protrudes from the raised portion 153A. The projecting portion 153B includes a bent portion 153B1 formed following the rising portion 153A, and a return portion 153B2 formed at the tip of the bent portion 153B1. The hook portion 154 includes a rising portion 154A rising from the second base portion 12 and a projecting portion 154B projecting from the rising portion 154A. The projecting portion 154B includes a bent portion 154B1 formed following the rising portion 154A, and a return portion 154B2 formed at the tip of the bent portion 154B1.

In this specification, "outward" and "inward" are defined with respect to the width direction of the zipper tape 10. In the illustrated example, the male engaging portion 13A faces "outward" away from the single raised portion 15A. On the other hand, for the female engagement portion 13B, the direction toward the inner space sandwiched between the two raised portions 153A and 154A, that is, the direction from one of the raised portions 153A and 154A to the other is "inward".

As shown, the male engaging portion 13A and the female engaging portion 13B are configured such that the male engaging portion 13A fits inside the female engaging portion 13B. When the male engaging portion 13A and the female engaging portion 13B engage with each other, the hook portion 151 of the male engaging portion 13A and the hook portion 153 of the female engaging portion 13B engage with each other. The hook portion 152 of the mold engaging portion 13A and the hook portion 154 of the female mold engaging portion 13B are engaged with each other. The configuration up to this point is the same for the general zipper tape 90 shown in FIG.

In the zipper tape 10 according to this embodiment, the male engaging portion 13A and the female engaging portion 13B are engaged by adopting one, two or more, or all of the configurations described below. The force required for this is 30 N/15 mm or more and 100 N/15 mm or less. In the following description, the force required to engage the male engaging portion 13A and the female engaging portion 13B is also referred to as closing strength of the zipper tape 10. FIG. Closing strength was determined by cutting a zipper tape into a width of 15 mm and placing the first base 11 and the second base 12 in a state where the male engaging portion 13A and the female engaging portion 13B are not engaged. , After fixing the surface of the second base 12 opposite to the female engagement portion 13B on a stand or the like, compress it to the surface of the first base 11 opposite to the male engagement portion 13A. It can be calculated by applying a force and measuring the maximum value of the compressive force applied until the male engaging portion 13A and the female engaging portion 13B are engaged. The compressive force can be measured using, for example, a digital force gauge manufactured by Imada Co., Ltd., but is not limited to this example.

In the case of the general zipper tape 90 shown in FIG. 2, the closing strength is about 10N/15mm to 20N/15mm. Since the closure strength of the zipper tape 10 according to the present embodiment is 30 N/15 mm or more, the engagement portion is more difficult to close than the general zipper tape 90 . In other words, the zipper tape 10 can prevent the engaging portions from closing without an additional member such as a film inserted between the engaging portions. The closing strength of the zipper tape 10 is preferably 35 N/15 mm or more, more preferably 40 N/15 mm or more. If the zipper tape 10 is used in a tamper-proof application as described below, the closure strength may be 50 N/15 mm or greater, preferably 60 N/15 mm or greater.

On the other hand, the zipper tape 10 also has a closing strength of 100 N/15 mm or less, so that the engagement portion can be finally closed. For example, the zipper tape 10 may be used only in certain situations, such as when either the first base 11 or the second base 12 is placed on a stand or the like and fixed after being attached to the container body as described below. It may be designed to be closed. The closing strength of the zipper tape 10 is preferably 85 N/15 mm or less, more preferably 70 N/15 mm or less. When the zipper tape 10 is used for anti-tampering purposes as described later, for example, when it is not necessary to close the engaging portion that has been opened once, the closing strength does not have the upper limit as described above. For example, the closing strength may be 200 N/15 mm or less in order to close the engaging portion first.

A configuration that can be employed to set the closing strength of the zipper tape 10 according to the present embodiment to 30 N/15 mm or more and 100 N/15 mm or less will be described below. Although the illustrated example employs all of the following configurations (1) to (5), the embodiments of the present invention are not limited to such examples. As already mentioned, only one of the configurations (1) to (5) may be employed, a plurality of them, or all of them may be employed.

(1) Width of Diagonal Rising Portion In the zipper tape 10 according to the present embodiment, the width d1 of the diagonal rising portion of the hook portion 154 included in the female engaging portion 13B is 0.35 mm or more. As described above, hook 154 includes upright portion 154A and protrusion 154B. The rising portion 154A is a first rising portion 154A1 that rises obliquely with respect to the second base portion 12 from the connection area between the female engaging portion 13B and the second base portion 12, and the first rising portion 154A1 follows the first rising portion 154A1. , and a second raised portion 154A2 that rises at an angle closer to the vertical to the second base portion 12 than the first raised portion 154A1. The bent portion 154B1 of the projecting portion 154B is formed following the second upright portion 154A2. In this embodiment, the width d1 of the first rising portion 154A1 that rises obliquely with respect to the second base portion 12 is 0.35 mm or more. The width d1 is the dimension in the direction perpendicular to the direction in which the first rising portion 154A1 rises. Defined. In a general zipper tape 90, the width d1 of the first raised portion 154A1 is less than 0.35 mm. The closure strength can be increased by increasing the width d1. In the zipper tape 10, the width d1 of the first rising portion 154A1 is preferably 0.4 mm or more, more preferably 0.45 mm or more, even more preferably 0.5 mm or more, and particularly preferably 0.4 mm or more. 6 mm or more. In order to keep the closing strength within an appropriate range, the width d1 of the first raised portion 154A1 in the zipper tape 10 is, for example, 1.0 mm or less, preferably 0.9 mm or less, more preferably 0.9 mm or less. 8 mm or less. The first rising portion 154A1 as described above may be positioned on either the opening side or the storage space side of the container in a container with a zipper tape in which the zipper tape 10 is attached to the container body as described later. It is preferable to arrange the first raised portion 154A1 on the opening side, and more preferably to arrange the first raised portion 154A1 on both the opening side and the storage space side.

(2) Minimum Width of Connection Area of Female Engaging Portion In the zipper tape 10 according to the present embodiment, the minimum width d2 of the connection area between the female engaging portion 13B and the second base portion 12 is 1.0 mm or more. 0.8 mm or less. Here, the connection region is a portion where the rising portions 153A and 154A of the female engaging portion 13B rise from the second base portion 12, and the distance between the outer sides of the rising portions 153A and 154A in the width direction of the zipper tape 10 is different. It is a constricted region that is smaller than the portion of . In a typical zipper tape 90, the minimum width d2 of the connection area is less than 1.0 mm. The closure strength can be increased by increasing the minimum width d2. In the zipper tape 10, the minimum width d2 of the connection area between the female engaging portion 13B and the second base portion 12 is preferably 1.1 mm or more, more preferably 1.2 mm or more. In order to keep the closing strength within an appropriate range, the minimum width d2 of the zipper tape 10 is 1.8 mm or less, preferably 1.7 mm or less, and more preferably 1.6 mm or less.

(3) Length of oblique rising portion In the zipper tape 10 according to the present embodiment, the oblique rising portion of the hook portion 154 included in the female engaging portion 13B, that is, the first rising portion 154A1 described in (1) above. , the length d3 along the rising direction is 0.4 mm or less. In a general zipper tape 90, the length d3 of the first raised portion 154A1 exceeds 0.4 mm. Closing strength can be increased by making the length d3 shorter. In the zipper tape 10, the length d3 of the first raised portion 154A1 is preferably 0.35 mm or less, more preferably 0.3 mm or less. The lower limit of length d3 is not particularly limited.

(4) Outside Angle of Bent Part of Female Engaging Portion In the zipper tape 10 according to the present embodiment, the outside angle θ1 of the bending portions 153B1 and 154B1 of the female engaging portion 13B is 145° or more. As described above, bent portions 153B1 and 154B1 are formed at the distal end portions of the hook portions 153 and 154 of the female engaging portion 13B. The outer sides of the bent portions 153B1 and 154B1 come into contact with the hook portions 151 and 152 of the male engaging portion 13A when the male engaging portion 13A is to be fitted inside the female engaging portion 13B. A face is formed. These surfaces are hereinafter referred to as contact surfaces 153C and 154C. In this embodiment, the angle θ1 formed by the contact surfaces 153C and 154C outside the female engagement portion 13B, that is, on the side opposite to the inner space of the female engagement portion 13B between the hooks 153 and 154 is 145°. ° or more. In a general zipper tape 90, the angle θ1 is less than 145°. The closing strength can be increased by increasing the angle θ1. In the zipper tape 10, the angle θ1 is preferably 150° or more, more preferably 160° or more. Also, the upper limit of the angle θ1 is not particularly limited, and may exceed 180°, but is, for example, 200° or less.

(5) Thickness of Connection Area of Female Engaging Portion In the zipper tape 10 according to the present embodiment, from the internal space of the female engaging portion 13B between the hook portions 153 and 154, the thickness of the second base portion 12 is increased. The shortest distance d4 to the surface opposite to the female engagement portion 13B is 0.50 mm or more. This distance d4 is the thickness including the second base portion 12 of the connection area between the female engaging portion 13B and the second base portion 12 . In general zipper tape 90, distance d4 is less than 0.50 mm. The closing strength can be increased by making the distance d4 larger. In the zipper tape 10, the distance d4 is preferably 0.51 mm or more, more preferably 0.52 mm or more. Although the upper limit of the distance d4 is not particularly limited, it is, for example, 1.00 mm or less.

(6) Angle Formed by the Inclined Surface of the Male Engaging Portion In the zipper tape 10 according to the present embodiment, the angle θ2 formed by the inclined surface formed between the hook portions 151 and 152 of the male engaging portion 13A is 140° or more. Between the hook portions 151 and 152 of the male engaging portion 13A, a mountain shape is formed by an inclined surface 151C continuing to the projecting portion 151B of the hook portion 151 and an inclined surface 152C continuing to the projecting portion 152B of the hook portion 152. It is The connecting portion between the inclined surface 151C and the inclined surface 152C, that is, the top of the mountain shape may be angular or rounded as in the illustrated example. The angle θ2 formed by the inclined surface 151C and the inclined surface 152C on the side of the male engagement portion 13A (that is, on the inner angle side of the chevron) is 140° or more. In a general zipper tape 90, the angle θ2 is less than 140°. The closing strength can be increased by increasing the angle θ2. In the zipper tape 10, the angle θ2 is preferably 145° or more, more preferably 150° or more. The upper limit of the angle θ2 is not particularly limited, and may exceed 180°, but is, for example, 300° or less.

The zipper tape 10 as described above is made of a polyolefin resin, specifically, a resin composition containing, for example, polypropylene as a main component. The resin composition may comprise low density polyethylene (LDPE) or linear low density polyethylene (LLDPE). At least a portion of the LDPE or LLDPE may be bio-polyethylene. The polyolefin resin, which is the main component of the first resin composition, is not limited to a fossil fuel-derived resin, but is an environmentally friendly bioplastic (polyolefin resin such as biomass-derived bio-polypropylene or bio-polyethylene). or a mixture of fossil fuel-derived resins and bioplastics. Known additives such as stabilizers, antioxidants, lubricants, antistatic agents, or colorants may be added to the first resin composition, if necessary. The zipper tape 10 does not necessarily have to be entirely made of the same resin composition. The resin composition forming the engaging portion 13B may be different.

The rigidity of the male engaging portion 13A and the female engaging portion 13B varies depending on the components of the resin composition forming the male engaging portion 13A and the female engaging portion 13B, thereby increasing the closing strength of the zipper tape 10. also change. In this embodiment, by selectively adopting the above configurations (1) to (5) according to the components of the resin composition forming the male engaging portion 13A and the female engaging portion 13B, The closing strength of the zipper tape 10 is set to 30 N/15 mm or more and 100 N/15 mm or less.

FIG. 3 is a plan view of a container with a zipper tape including the zipper tape shown in FIG. In the illustrated example, the zipper tape-equipped container 100 includes a bag-like container body formed of a film 110 having a first surface 111A and a second surface 111B facing the storage space SP, and the zipper tape 10 . The zipper tape 10 is attached to the container body by bonding the first base portion 11 to the first surface 111A and the second base portion 12 to the second surface 111B, respectively.

In the illustrated example, two sheets of film 110 are joined together at the bottom seal portion 112 and the side seal portion 113 to form the bag-like container body, but in other examples, one sheet of film is used. A bag-shaped container body may be formed by folding back the portion 110 corresponding to the side seal portion 113 . Also, a portion corresponding to the bottom seal portion 112 or the side seal portion 113 may be formed with the film 110 folded inward, that is, a so-called gusset. In this case, the gusset may be formed by film 110 or by another film joined to film 110 . The zipper tape-equipped container 100 may be a standing pouch that can be placed upright by forming a gusset on the bottom. In the illustrated example, an opening 101 is formed on the opposite side of the zipper tape 10 from the storage space SP without connecting the first surface 111A and the second surface 111B of the film 110. Also in this portion, the first surface 111A and the second surface 111B are joined to form a top seal portion, and an opening is formed afterward by cutting between the top seal portion and the zipper tape 10. good too.

In the above example, the film 110 is formed of, for example, a single layer or multiple layers of thermoplastic resin. More specifically, film 110 is formed of, for example, polypropylene or high density polyethylene (HDPE), linear low density polyethylene (LLDPE). Polypropylene is for example homopolypropylene (HPP), random polypropylene (RPP) or block polypropylene (BPP). When the film 110 is multi-layered, biaxially oriented polypropylene (OPP), biaxially oriented polyethylene terephthalate (OPET), or biaxially oriented nylon (ONy) may be used for the face substrate. These are not limited to fossil fuel-derived resins, but may be environmentally friendly bioplastics (polyolefin resins such as biomass-derived bio-polypropylene or bio-polyethylene). It may be a mixture. The film 110 may include an inorganic material layer formed by vapor deposition of aluminum, lamination of aluminum foil, or the like.

In the container 100 with a zipper tape as described above, the closure strength of the zipper tape 10 is 30 N/15 mm or more and 100 N/15 mm or less, and the engaging portion is more difficult to close than a general zipper tape. Therefore, for example, when the container 100 with the zipper tape 10 is conveyed with the engaging portions of the zipper tape 10 open, the engaging portions can be maintained even without an additional member such as a film inserted between the engaging portions. After preventing the closure, the contents can be enclosed in the storage space SP from between the opened zipper tapes 10, and the engagement part can be closed.

Alternatively, a tampering prevention method using the container 100 with a zipper tape as described above may be implemented. Since the closure strength of the zipper tape 10 is set to 30 N/15 mm or more, the normally assumed force, for example, when a person tries to close the zipper tape 10 by pinching the zipper tape 10 from the outside of the first surface 111A and the second surface 111B A closure strength greater than the applied force can be set. In this case, once the engaging portion of the zipper tape 10 is opened, it cannot be closed easily. Therefore, if the contents are tampered with by someone, the engaging portion of the zipper tape 10 remains open, so the tampering can be detected.

As examples and comparative examples of the present invention, zipper tapes formed with engaging portions having shapes as shown in Table 1 below were tested for closing strength, that is, engagement between the male engaging portion and the female engaging portion. We measured the force required to In this embodiment, the closing strength was measured by cutting the zipper tape into a width of 15 mm, facing the base with the engaging portion not engaged, and placing the female base on the side opposite to the engaging portion. After placing it on and fixing it, a compressive force is applied to the surface opposite to the engaging part of the male base, and the maximum value of the compressive force applied until the engaging part is engaged is measured by Imada Co., Ltd. It was calculated by measuring using a digital force gauge (model name: ZTS-200N) manufactured by

The width d1, the minimum width d2, the length d3, the distance d4, the angles θ1 and θ2 in the table all mean the dimensions and angles of the respective portions of the engaging portion described above with reference to FIG. .

The above results show that the structure of the engaging portion of the zipper tape described as the embodiment of the present invention is effective for increasing the closing strength of the zipper tape.

Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to these examples. It is obvious that a person skilled in the art of the technical field to which the present invention belongs can conceive of various modifications or modifications within the scope of the technical idea described in the claims. Naturally, it is understood that it belongs to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10... Zipper tape 11... 1st base 12... 2nd base 13A... Male engaging part 13B... Female engaging part 151, 152, 153, 154... Hook part 15A, 153A, 154A...rising portion, 154A1...first rising portion, 154A2...second rising portion, 151B, 152B, 153B, 154B...projecting portion, 153B1, 154B1... bending portion, 152B2, 153B2, 154B2...returning portion, 151C, 152C... inclined surface 153C, 154C... contact surface 100... container with zipper tape 101... opening 110... film 111A... first surface 111B... second surface 112... bottom seal portion 113... side seal portion , SP... Storage space.

Claims (10)

1. A zipper tape comprising a first base, a male engaging portion projecting from the first base, a second base, and a female engaging portion projecting from the second base,
   the male engaging portion includes first and second outwardly projecting barbs;
   The female engaging portion includes third and fourth hook portions protruding inward, and the first hook is engaged when the male engaging portion is fitted inside the female engaging portion. and said third barb and said second barb and said fourth barb are configured to engage with each other, respectively;
   A zipper tape, wherein a force required to engage the male engaging portion and the female engaging portion is 30 N/15 mm or more and 100 N/15 mm or less.
2. Either a barbed portion is formed at the tips of the second hook and the fourth hook, and no barb is formed at the tips of the first hook and the third hook, or A barb portion having a larger angle than the barb portion of the second hook portion and the barb portion of the fourth hook portion is formed,
   The fourth hook portion has a first rising portion that rises obliquely from the connection area between the female engaging portion and the second base portion with respect to the second base portion, and the first rising portion. Subsequently, a second rising portion rising at an angle closer to the vertical than the first rising portion with respect to the second base portion, a bent portion formed following the second rising portion, and the bending and the return part formed at the tip of the part,
   The zipper tape according to claim 1, wherein the width of said first raised portion is 0.35 mm or more.
3. The zipper tape according to claim 1 or claim 2, wherein the minimum width of the connection area between the female engaging portion and the second base portion is 1.0 mm or more and 1.8 mm or less.
4. Either a barbed portion is formed at the tips of the second hook and the fourth hook, and no barb is formed at the tips of the first hook and the third hook, or A barb portion having a larger angle than the barb portion of the second hook portion and the barb portion of the fourth hook portion is formed,
   The fourth hook portion has a first rising portion that rises obliquely from the connection area between the female engaging portion and the second base portion with respect to the second base portion, and the first rising portion. Subsequently, a second rising portion rising at an angle closer to the vertical than the first rising portion with respect to the second base portion, a bent portion formed following the second rising portion, and the bending and the return part formed at the tip of the part,
   The zipper tape according to any one of claims 1 to 3, wherein the first rising portion has a length along the rising direction of 0.4 mm or less.
5. The third and fourth hooks each include a raised portion rising from a connecting region between the female engaging portion and the second base portion, a bent portion formed following the raised portion, and a portion of the bent portion. and a barb formed at the tip,
   The surface of the outer side of the bent portion that contacts the first and second hooks when the male engaging portion is to be fitted inside the female engaging portion is the female engaging portion. 5. The zipper tape according to any one of claims 1 to 4, wherein the angle formed on the outside of the portion is 145[deg.] or more.
6. The shortest distance from the inner space of the female engaging portion between the third and fourth hooks to the surface of the second base opposite to the female engaging portion is 0.50 mm. The zipper tape according to any one of claims 1 to 5, which is the above.
7. In the male engaging portion, between the first and second hooks are a first inclined surface continuous with the first hook and a second inclined surface continuous with the second hook. is formed,
   The zipper tape according to any one of claims 1 to 6, wherein the first inclined surface and the second inclined surface form an angle of 140° or more on the side of the male engaging portion. .
8. a container body;
   The zipper tape according to any one of claims 1 to 7, wherein the first base and the second base are respectively joined to the container body.
9. The container with a zipper tape according to claim 8, wherein the container body is bag-shaped.
10. 10. The container with zipper tape according to claim 8 or claim 9, wherein the force required to engage the male engaging portion and the female engaging portion is larger than the force normally assumed. A tampering prevention method for preventing tampering of the contents of the container with a zipper tape by

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