JPH09306734A - Antitheft label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a label which includes various commodity information, enables prevention of exposure of a detection member, and has excellent operability and appropriate flexibility. SOLUTION: This label is formed by laminating a pulse generation magnetic thin wire 1 and magnetic thin bands 2, 3 arranged on both ends thereof with at least two tape base members 4, 5, thus generating large Barkhausen inversion. In this case, of at least the two tape base members 4, 5 for laminating the magnetic thin wire 1 and the magnetic thin bands 2, 3, the tape base member 4 on the front side of the label is a paper sheet which has a thickness of 50-100μm and has a bar code 10 printed thereon.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft label attached to a product in order to monitor the taking out of the product from the store and prevent the product from being taken out without permission.

[0002]

2. Description of the Related Art It has been known that a label can be attached to a product to prevent the product from being stolen. In general, the label previously attached to the product is deactivated in the label inspection area (area created by radio waves, electromagnetic waves or magnetism having a predetermined size) formed by the transmitting antenna installed at the entrance of the store. When entering without being carried out, a method is adopted in which a peculiar signal is generated and is detected by a receiving antenna installed at the entrance of the store similarly to the transmitting antenna and an alarm such as an alarm is generated. For example, an AC magnetic field is applied to a high-permeability magnetic ribbon or a thin magnetic wire, and the resulting magnetic field in the inspection area or a harmonic component of an output pulse is detected. A radio wave is radiated from the outside to detect a resonance phenomenon in a label.

[0003] Above all, those using an amorphous magnetic fine wire having a large Barkhausen characteristic as a label are:
It is excellent in that it is possible to configure a system having high sensitivity and less erroneous detection (Japanese Patent Laid-Open No. 61-153799). Further, a magnetic label having a structure in which a magnetic ribbon having a coercive force smaller than the coercive force of the magnetic fine wire is arranged at the end of the amorphous magnetic fine wire has various forms because of its high sensitivity, small false detection, and small size. It could be attached to an article as well (Japanese Patent Laid-Open No. Hei 4)
-195384).

Conventionally, such a label is formed by laminating at least two tape base materials with a detection member (a member that receives a magnetism, an electric wave or an electromagnetic wave and generates a specific signal) such as the high magnetic permeability magnetic ribbon. In general, the tape base material on the side to be attached to the product (hereinafter referred to as the attachment side) and the label surface side that is arranged to face the tape base material with the detection member interposed therebetween ( Hereinafter, it will be referred to as the front surface side). As the adhesive tape base material, a film or paper having a pressure sensitive adhesive or an adhesive on both sides or one side is used. In addition, a transparent or semitransparent film or white or colored paper is mainly used for the front surface side tape substrate, and a price, a note, or the like may be printed on the film. Further, the front-side tape base material may have an adhesive on the side on which the detection member is laminated (hereinafter referred to as the laminating side), if necessary.

[0005]

When a transparent film or white paper is used for the front surface side tape substrate as in the prior art, when the label is attached to the product, the detection member can be easily recognized from the outside. There was the problem that The recognition of the detection member is consistent with the recognition that it is an anti-theft label, and if a shoplifter removes the label from the product or aims at another product without a label, it can easily execute shoplifting It was possible to do. In other words, the label attached to the product may no longer function as an antitheft function.

Therefore, a translucent film may be used in place of the transparent film, but the detection member cannot be completely hidden, and the cost is greatly increased because it is a special film. There was also a problem. Furthermore, when using paper as the front-side tape base material, there is also a method of increasing the thickness of the paper, but increasing the thickness not only increases the cost, but also makes the label bulky and makes it difficult to attach the label. There is a problem that the operability of the label sticking machine used for is impaired and the products that can be stuck are limited. When using colored paper, the detection member can be hidden only in a limited color (for example, blue), and the label may be conspicuous depending on the shade of the product to be attached. Further, if the color of the tape base material used on the front surface side is limited, it becomes impossible to meet various needs in retail stores. The present invention provides an anti-theft label that has various product information, can prevent the detection member from being exposed to the outside, and has excellent operability and appropriate flexibility. The purpose is.

[0007]

As a result of earnest studies for solving the above problems, the present inventor has found that at least two tapes are provided with a pulse-generating magnetic thin wire and magnetic ribbons closely attached to both ends thereof. In an anti-theft label that causes large Barkhausen reversal by laminating with a base material, a thickness of 50 is used as the front-side tape base material among at least two tape base materials on which the magnetic thin wire and the magnetic ribbon are laminated. By using barcode printed paper of ~ 100 μm, not only has information such as the country of origin, manufacturer / seller, price, etc., but also the detection member, in this case, magnetic fine wire and magnetic ribbon are exposed to the outside. The present invention has been accomplished by finding the fact that it can be prevented, and further, the operability and flexibility at the time of sticking can be improved. That is,
The present invention relates to an antitheft label that causes large Barkhausen inversion by laminating a pulse-generating magnetic thin wire and magnetic ribbons arranged at both ends thereof with at least two tape base materials. Of at least two tape base materials for laminating magnetic ribbons, the tape base material on the label surface side is a paper having a thickness of 50 to 100 μm and a bar code printed thereon, and is for theft prevention. The label is the gist.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic perspective view showing an example of the anti-theft label of the present invention. In FIG. 1, a magnetic thin wire 1 which is a pulse generating element and magnetic thin strips 2 and 3 which are closely attached to both ends thereof are laminated by two tape base materials 4 and 5 having adhesive layers 7, 8 and 9, and On the lower surface of the tape base material 5, a release paper 6 subjected to a release treatment is arranged. In addition, the tape base material 4 is a tape base material on the label front side (front side), and is a tape exposed to the outside. The tape substrate 5 is a tape substrate on the side to be adhered to a product (adhering side). By peeling off the release paper 6 on the lower surface of the tape base 5 on the sticking side, a label can be stuck to the product.

In the antitheft label of the present invention, it is necessary that the front surface side tape substrate 4 is made of paper, and white high-quality paper or medium-quality paper is preferably used. In addition, machine calender and super calendered gravure paper to enhance the smoothness of the paper surface, art paper and coat coated with paint containing pigment, adhesive and auxiliary chemicals on high-quality paper and medium-quality paper to improve printability. Paper is particularly preferred. Art paper and coated paper have the effect of increasing the degree of concealment of the paper.

Further, it is necessary that the bar code 10 is printed on the front surface side tape substrate 4, and further,
It is preferable that the barcode 10 includes information such as a country of manufacture, a manufacturer / seller, and a price of the product. This allows
It is possible to realize a multi-function label having both a POS function and an anti-theft function. Since the barcode 10 is printed on the front surface side of the tape base material 4, it is possible to prevent the detection member from being exposed to the outside, and it is a theft-prevention label even when the customer sees the attached label. There is an advantage that it is hard to have the recognition.

The thickness of the front tape base material 4 is 50
˜100 μm, preferably 7
It is 5 to 85 μm. When the thickness of the tape base material 4 is less than 50 μm, even if the art paper or the coated paper is used, the detection member cannot be sufficiently hidden by the barcode, and the label may be broken when it is attached. It may occur. on the other hand,
When the thickness of the tape base material 4 is 100 μm or more, the rigidity of the label becomes large, and when the label is attached to a product having a curvature, the label is turned up. Moreover, it is preferable that the front surface side tape base material 4 has an adhesive layer 7 on the laminate side. As a result, a stable contact state between the magnetic thin wire 1 and the magnetic ribbons 2 and 3 can be realized, and a decrease in label detection accuracy due to poor contact can be prevented. The pressure-sensitive adhesive of the pressure-sensitive adhesive layer 7 is preferably a rubber-based, acrylic-based, or silicon-based pressure-sensitive adhesive, and the thickness of the pressure-sensitive adhesive layer 7 is preferably 5 to 30 μm.

As the adhesive tape base material 5 used in the present invention, it is usually preferable to use a film adhesive tape having an adhesive layer on both sides and having a thickness of about 20 to 50 μm.
The material of the film is polyethylene, polyester,
Polypropylene or the like is preferable. Further, like the front surface tape base material 4, the sticking side tape base material 5 also preferably has an adhesive layer 8 on the laminate side. Examples of commercially available pressure sensitive adhesives include acrylic emulsion pressure sensitive adhesives YJ. -8
413 (manufactured by Tuck System). Thereby, the laminating property can be stabilized. Further, in order to attach the anti-theft label of the present invention to a product, it is preferable to have an adhesive layer 9 on the attaching side of the attaching side tape base material 5. As the adhesive of the adhesive layer 9, it is preferable to use a rubber-based, acrylic-based, or silicon-based adhesive.
As a commercially available adhesive, for example, Movinyl UN94
(Hoechst Synthetic Co., Ltd.), JHL-23-59 (Hoechst Synthetic Co., Ltd.) and the like. Further, the thickness of the adhesive layer 9 is preferably 25 to 40 μm. Further, as the release paper 6, at least the adhesive tape base 5
A mold release treatment (for example, silicon treatment) was applied to the side,
It is preferable to use a paper tape having a thickness of 40 to 80 μm.

As the magnetic fine wire 1 included in the anti-theft label of the present invention, it is preferable to use a soft magnetic metal fine wire having a large Barkhausen characteristic at a line length that is less affected by a demagnetizing field. It is preferable to use an amorphous metal wire, a Wiegand wire, a Fe—Si wire, or the like. Furthermore, in order to improve the output signal (for example, a pulse signal or a harmonic signal) of the anti-theft label of the present invention, the metal thin wire may be subjected to a post-treatment such as heat treatment. Further, the coercive force of the magnetic thin wire 1 is 0.05 to 1.0 Oe, and furthermore, the coercive force of the magnetic fine wire 1 is 0.1 to 0.1 Oe.
1 to 0.5 oersted is preferable, and the diameter of the magnetic thin wire is 80 to 120 μmφ, and further 90
It is preferably about 110 μmφ. Wire diameter is 80 μm
If less than, the cross-sectional area of the magnetic wire 1 is insufficient,
The detection signal tends to be low. On the other hand, when the wire diameter exceeds 120 μm, the demagnetizing field becomes large, and it becomes difficult to exhibit the large Barkhausen characteristic in the size of the antitheft label which is practically suitable. Moreover, as the length of the magnetic thin wire 1,
It is preferably 15 to 40 mm, and further 20 to 20 mm.
More preferably, it is 35 mm. When the length is less than 15 mm, the demagnetizing field becomes large, and it becomes difficult to exhibit the large Barkhausen characteristic in the size of the antitheft label which is practically suitable. On the other hand, if the length exceeds 40 mm, the entire length of the anti-theft label becomes long, and it becomes difficult to attach it to products of various sizes.

The magnetic ribbons 2 and 3 used in the present invention need to be arranged at both ends of the magnetic wire 1. As the magnetic ribbons 2 and 3, it is preferable to use soft magnetic metal ribbons having a coercive force lower than that of the magnetic thin wire 1. The coercive force of the magnetic ribbons 2 and 3 is 0.01 to
The soft magnetic metal material is preferably 0.8 oersted, and permalloy, silicon steel, or an amorphous metal material is preferably used. Further, since the change in magnetic flux of the magnetic ribbons 2 and 3 has a great influence on the reduction of the demagnetizing field of the magnetic thin wire 1, the dimensions of the magnetic ribbons 2 and 3 are the same as those in the lengthwise direction for forming the antitheft label. The length is preferably 3 to 20 mm, the width is 3 to 10 mm, and the thickness is preferably 10 to 50 μm.

When the length of the magnetic ribbons 2 and 3 is less than 3 mm, the demagnetizing field of the magnetic ribbons 2 and 3 increases, and the amount of magnetic flux required to reduce the demagnetizing field of the magnetic wire 1 is obtained. It will be difficult to be affected. Further, if the length exceeds 20 mm, the entire length of the anti-theft label becomes long, and it becomes difficult to attach the anti-theft label to products of various shapes. Further, when the width and thickness of the magnetic ribbons 2 and 3 are less than 3 mm and less than 10 μm, respectively, the cross-sectional area of the magnetic ribbons 2 and 3 contributing to the change in magnetic flux is insufficient, so that it is difficult to exhibit large Barkhausen characteristics. Become. If the width and the thickness exceed 10 mm and 50 μm, respectively, the demagnetizing field increases, and the effect due to the increase in the cross-sectional area cannot be obtained.

The shape of the magnetic ribbons 2 and 3 is not particularly limited, and may be polygonal or circular in addition to the rectangle as shown in FIG. The positional relationship between the magnetic thin wire 1 and the magnetic ribbons 2 and 3 is such that the magnetic tape is positioned within ± 25% of the center of the magnetic ribbons 2 and 3 in the length and width directions of forming the anti-theft label. It is preferable that an end of the thin wire 1 exists.

The antitheft label having the large Barkhausen characteristic of the present invention exhibits a sharp change in magnetic flux at a predetermined threshold value H * when exposed to an alternating magnetic field. Generates a detection signal that excels in waves.
Such an output voltage and a detection signal excellent in high order harmonics enhances the sensitivity of the detection system and further helps to distinguish the anti-theft label from other metallic materials. .

[0018]

Next, the present invention will be described specifically with reference to examples and comparative examples. Example 1 First, an anti-theft label having a configuration as shown in FIG. 1 was produced. A roll-shaped label roll 11 in which the anti-theft label is arranged on the continuous release paper 6 at an equal pitch
Was produced. FIG. 2 is a schematic perspective view of the label roll. The magnetic fine wire 1 includes (Co ₅₀ Fe ₅₀ ) ₇₈ Si ₉ B ₁₃
Wire diameter 100 with alloy composition (numbers indicate atomic%)
An amorphous metal thin wire having a diameter of μmφ and a length of 27 mm was used. Further, the magnetic ribbons 2 and 3 each have a length of 10 mm having an alloy composition of Fe ₇₈ Si ₉ B ₁₃ (numbers represent atomic%).
Amorphous ribbons having a width of 7 mm and a thickness of 25 μm were used, and they were closely attached to both ends of the magnetic thin wire 1. The amorphous metal fibers are subjected to tension heat treatment after drawing.

A coated paper having a thickness of 80 μm was used as the front surface side tape substrate 4, and an adhesive layer 7 having a thickness of 25 μm was formed on the laminate side by using an acrylic emulsion-based adhesive as the adhesive layer 7. A bar code 10 is printed on the front surface of the front tape base material 4. A PET double-sided adhesive tape having a thickness of 25 μm is used as the sticking side tape base material 5, and an acrylic emulsion-based adhesive YJ-8413 (manufactured by Tuck System) is used as the adhesive layer 8 on the laminating side to obtain a thickness of 22 μm. The adhesive layer 8 was formed. further,
As the adhesive layer 9 on the sticking side of the tape substrate 5, an acrylic adhesive Movinyl UN94 (manufactured by Hoechst Gosei Co., Ltd.) was used to form an adhesive layer 9 having a thickness of 32 μm. As the release paper 6, a paper tape having a thickness of 65 μm and having a silicon treatment applied to the adhesive tape base 5 side was used.

BH (B: magnetic flux density, H: exciting magnetic field) was measured using the anti-theft label thus produced. AC BH tracer AC BH measurement
-100K (manufactured by Riken Electronics Co., Ltd.), frequency 50H
A sinusoidal magnetic field having a z and an amplitude of 1 Oe was excited in the length direction of the label, and a change in magnetic flux at the center of the label was detected by a detection coil having 100 turns. FIG. 3 shows the BH curve of the anti-theft label produced in Example 1. As is evident from the clear square loops in FIG. 3, the anti-theft label of the present invention exhibited large Barkhausen properties.

A label sticking test was conducted using the label roll manufactured in Example 1. In the sticking test, a label sticking machine JK-60 (manufactured by Sensmatic Co., Ltd.) was used to stick 100 samples of the label on the label roll to a cylinder having a curvature of 50 mmφ, and the degree of concealment of the detection member,
The ease of sticking and the stuck state were examined. All the 100 samples of the label before sticking showed a square BH curve as shown in FIG. The label after being attached could not recognize the presence of the detection member from the outside. Even when the label was attached, the label was smoothly transferred from the roll, and no tearing of the label or misapplication such as misalignment was observed. In addition, there was no problem that the label after application was turned up.

Comparative Example 1 An anti-theft label and a label roll were prepared in the same manner as in Example 1 except that a white paper single-sided adhesive tape having a thickness of 80 μm without bar code printing was used as the front side tape base material 4. , BH measurement and sticking test were performed. As a result, the label before sticking showed a square BH curve as shown in FIG. 3 in all 100 samples, but the sticker after sticking recognized both the magnetic thin wire and the magnetic ribbon from the outside. It was a thing.

Comparative Example 2 An antitheft label and a label roll were prepared in the same manner as in Example 1 except that the thickness of the front surface side tape substrate 4 was changed to 30 μm, and BH measurement and sticking test were conducted. As a result, all the 100 samples of the label before application showed a square BH curve as shown in FIG. 3, but the label after application had magnetic ribbons recognized from the outside. .
In addition, during sticking, bending and tearing of the label occurred in 13 of 100 samples.

Comparative Example 3 An anti-theft label and label roll were prepared in the same manner as in Example 1 except that the thickness of the front surface side tape substrate 4 was changed to 150 μm, and BH measurement and sticking test were conducted. As a result, in the label before sticking, all 100 samples showed a square BH curve as shown in FIG. 3, and in the sticker after sticking, neither the magnetic wire nor the magnetic ribbon was recognized from the outside. However, due to the increased thickness of the label, it was difficult to transfer the label from the applicator, and 10 out of 100 samples
Label misalignment or label ejection failure occurred in the sample. Further, immediately after application, 15 samples out of 100 samples were blunted at both ends of the label, and after 2 hours from application, label blunting was observed in almost all the samples.

[0025]

The anti-theft label of the present invention has various product information, can prevent the detection member from being exposed to the outside, and is excellent in operability and flexibility when attaching the label. It is a label.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an example of the anti-theft label of the present invention.

FIG. 2 is a schematic perspective view showing an example of a label roll in which the anti-theft labels of the present invention are continuously arranged.

FIG. 3 is a diagram showing BH curves of antitheft labels produced in Example 1 and Comparative Examples 1 to 3.

[Explanation of symbols]

 1 Magnetic fine wire 2, 3 Magnetic thin ribbon 4 Surface side tape base material 5 Adhesion side tape base material 6 Release paper 7, 8 Lamination side adhesive layer 9 Adhesion side adhesive layer 10 Bar code 11 Label roll 12 Anti-theft label

Claims (1)

[Claims] 1. An anti-theft label that causes large Barkhausen reversal, which is obtained by laminating a magnetic thin wire for pulse generation and magnetic thin strips arranged at both ends thereof with at least two tape base materials. And the at least two tape base materials for laminating the magnetic ribbon, the tape base material on the label surface side is a paper having a thickness of 50 to 100 μm and having a barcode printed thereon. Label.