WO2008044414A1

WO2008044414A1 - Electromagnetic wave shielding sheet, and electromagnetic wave shielding cloths

Info

Publication number: WO2008044414A1
Application number: PCT/JP2007/067633
Authority: WO
Inventors: Tomoaki Ito
Original assignee: Orient Instrument Computer Co., Ltd.
Priority date: 2006-10-10
Filing date: 2007-09-11
Publication date: 2008-04-17
Also published as: JP2008093093A

Abstract

Provided are an electromagnetic wave shielding sheet (3) and an electromagnetic wave shielding apron (1), which can shield especially the magnetic field of electromagnetic waves. The electromagnetic wave shielding sheet (3) includes a copper layer (5) so formed of a copper material as to act as electromagnetic wave absorbing layer for absorbing a magnetic field (G2), and an aluminum layer (7) so formed of an aluminum material as to act as an electromagnetic wave shielding layer for shielding the magnetic field (G2). The aluminum layer (7) is arranged on the side closer to the human body than the copper layer (5), thereby to form the electromagnetic wave shielding sheet (3) for shielding the magnetic field (G2) to protect the human body against the magnetic field (G2). The electromagnetic wave shielding apron (1) is also formed by using the electromagnetic wave shielding sheet.

Description

Specification

Electromagnetic shielding sheet and electromagnetic shielding clothing

Technical field

[0001] The present invention relates to an electromagnetic wave shielding sheet and an electromagnetic wave shielding garment that protects an object to be protected from electromagnetic waves, for example, and in particular, an electromagnetic wave that protects a human body of a cardiac pacemaker user from electromagnetic waves emitted by an IH tacking heater or the like. About shield clothes

Background art

[0002] In modern society, radio waves from mobile phones and televisions are known to fly in the atmosphere, and this radio wave is known to affect the human body and precision equipment. In recent years, IH (Induction Heating) cooking heaters that generate electromagnetic fields and perform electromagnetic induction heating have been provided. It is also known that this magnetic field affects the human body and precision equipment.

[0003] Such radio waves and magnetic fields have the power S that makes the operation of a cardiac pacemaker, which is a precision machine, unstable. For this reason, users who use cardiac pacemakers need clothes that protect the cardiac pacemaker from radio waves and magnetic fields.

[0004] On the other hand, for example, an electromagnetic shielding material for cardiac pacemakers has been proposed as a means for blocking radio waves (see Patent Document 1). This electromagnetic shielding material for cardiac pacemakers is said to be able to block electromagnetic waves in the radio wave region by using a conductive material as a material.

[0005] Further, for example, electromagnetic wave shield clothing has been proposed as an electromagnetic wave shielding device (see Patent Document 2). This electromagnetic shield clothing is said to be able to block electromagnetic waves by applying copper or copper-tin-tin alloy plating on the apron lining!

[0006] However, although these shielding materials are effective against radio waves, they have not been able to effectively block a magnetic field. For this reason, it was not possible to protect the heart pacemaker from the magnetic field emitted by IH cooking heaters.

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2001-204828

Patent Document 2: JP-A-8-116191

Disclosure of the invention Problems to be solved by the invention

[0008] In view of the above-described problems, an object of the present invention is to provide an electromagnetic wave shielding sheet and an electromagnetic wave shielding garment that can block a magnetic field in an electromagnetic wave, in particular. Means for solving the problem

[0009] The present invention is an electromagnetic wave shielding sheet that blocks electromagnetic waves and protects the object to be protected from electromagnetic waves, and includes an electromagnetic wave absorbing layer that absorbs electromagnetic waves and an electromagnetic wave blocking layer that blocks electromagnetic waves, It is an electromagnetic wave shielding sheet in which the layer is arranged on the protection target side from the electromagnetic wave absorbing layer.

The electromagnetic wave absorbing layer can be formed of, for example, a copper material or an iron material.

The electromagnetic wave shielding layer can be formed of, for example, an aluminum material.

The invention's effect

[0010] According to the present invention, it is possible to block particularly a magnetic field in electromagnetic waves. In particular, when a user using a cardiac pacemaker uses the magnetic field force emitted from the IH cooking heater or the like, the user's human body can be reliably protected.

Brief Description of Drawings

[0011] FIG. 1 is a front view of an electromagnetic wave shielding apron.

FIG. 2 is a cross-sectional view of an electromagnetic shielding cloth.

FIG. 3 is an explanatory diagram of the shielding performance against an electric field and a magnetic field of an electromagnetic wave shielding sheet.

FIG. 4 is an explanatory diagram of the effect of preventing magnetic field wraparound.

FIG. 5 is a perspective view showing another example of an electromagnetic wave shielding sheet.

FIG. 6 is a perspective view showing another example of an electromagnetic wave shielding sheet.

FIG. 7 is a front view of an electromagnetic wave shielding apron of Example 2.

FIG. 8 is a cross-sectional view of the electromagnetic shielding cloth of Example 2.

FIG. 9 is a cross-sectional view of the electromagnetic shielding body and electromagnetic shielding clothing of Example 3.

Explanation of symbols

[0012] 1, 1A, 1Β · · · electromagnetic shielding apron 3, 3a, 3b ... electromagnetic shielding sheet, 3c ... electromagnetic wave sheet ¾ ^ 虽 sheet, 4, 9 · · · fabric layer, 5 · · · Same layer, 7 ... Noremi layer, 20 ... 23, surface fastener layer, Gl, G2 ... magnetic field

BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the present invention will be described below with reference to the drawings.

Example 1

FIG. 1 shows a front view of an electromagnetic wave shielding apron 1 using the electromagnetic wave shielding sheet 3, and FIG. 2 shows a cross-sectional view of the electromagnetic wave shielding cloth 2 using the electromagnetic wave shielding sheet 3.

As shown in the front view of FIG. 1, the electromagnetic wave shielding apron 1 is configured to be large enough to cover the front surface of the user M from under the neck to the thigh by the electromagnetic wave shielding cloth 2. . For this reason, when the user M wears the electromagnetic wave shield apron 1, the entire front surface of the cardiac pacemaker P is covered with the electromagnetic wave shield apron 1 when viewed from the front.

[0015] As shown in the cross-sectional view of FIG. 2, the electromagnetic shielding cloth 2 is configured by superposing and arranging the cloth layers 4 and 9 on the front and back of the electromagnetic shielding sheet 3 formed into a sheet having a constant thickness. ing.

[0016] The fabric layers 4 and 9 are made of an appropriate fiber material such as chemical fiber or natural fiber.

Chemical fibers include recycled fiber (rayon, cuvula, etc.), semi-synthetic fiber (acetate, plug mix, etc.), synthetic fiber (nylon, aramid, vinylon, pyridene, polychlorinated bur, polyester, acrylic, polyethylene, polypropylene , Polyurethane, polyclar, etc.), or fiber materials such as inorganic fibers (glass, carbon fibers, metal fibers, etc.). As natural fibers, fiber materials such as plant fibers (cotton, hemp, etc.) or animal fibers (wool, angora, force shear, mohair, camel, alpaca, silk, etc.) can be used.

[0017] The electromagnetic wave shielding sheet 3 is configured by superposing a copper layer 5, a carbon layer 6, an aluminum layer 7, and a carbon layer 8 in order from the front side (the left side in FIG. 2) which is the outside of the human body.

[0018] The copper layer 5 is a sheet-like layer formed of a copper material, and has a thickness of about 35 microns. The copper layer 5 is preferably made of a material that absorbs a magnetic force field, a material that passes a magnetic field, or a material that attracts a magnet. Examples of such materials include iron materials, nickel materials, and zinc materials in addition to copper materials. This fruit In the embodiment, by using a copper material, the manufacturing cost is reduced by suppressing the cost compared to using other materials.

The thickness of the copper layer 5 is preferably 10 microns or more, and more preferably 20 microns or more. In this embodiment, in order to achieve both the certainty of the electromagnetic wave shielding function and the flexibility for use in clothes, it is about 35 microns!

The carbon layers 6 and 8 are layers composed of a carbon sheet formed into a sheet shape from a carbon material, and are formed to have an appropriate thickness. In this embodiment, the aluminum layer 7 is formed thinner than the wall thickness.

The carbon layers 6 and 8 are preferably made of an insulating material having a force S and a property of releasing magnetism, which can be made of other materials, to form an insulating layer. In the present embodiment, carbon is used as a material that emits magnetism. The carbon layers 6 and 8 block the charging, magnetism, and electric field of the copper layer 5 and the aluminum layer 7 and absorb electromagnetic waves.

[0020] The aluminum layer 7 is a sheet-like layer having a constant thickness formed of an aluminum material. In this embodiment, the aluminum layer 7 has a thickness of about 7 microns. The aluminum layer 7 is preferably made of a material that reflects a magnetic field, a material that does not pass a magnetic field, or a material that does not attract a magnet. In this embodiment, it is made of an aluminum material that has a property of discharging without being charged and that can be formed lightweight.

[0021] With the above configuration, the electromagnetic wave shielding sheet 3 can exert a force S that blocks both an electric field and a magnetic field. Therefore, it can block 800MHz, 1.5GHz, 1.7GHz, 2GHz and so on radio waves emitted by mobile phones and magnetic fields of frequencies 20kHz to 90kHz emitted by IH cooking heaters.

[0022] The electromagnetic wave shielding apron 1 constituted by the electromagnetic wave shielding sheet 3 can prevent the radio wave and the magnetic field from affecting the human body of the user wearing clothes. Therefore, if the user M who uses the cardiac pacemaker P wears the electromagnetic wave shield apron 1, the operation of the cardiac pacemaker P can be prevented from becoming unstable due to radio waves and magnetic fields.

[0023] The electromagnetic wave shielding sheet 3 used in this example has sufficient shielding characteristics as shown in (A) of the explanatory diagram of FIG. Is obtained. [0024] In addition, when this electromagnetic shielding sheet 3 is measured against the magnetic field by the KEC method, sufficient shielding characteristics are obtained as shown in (B) of the explanatory diagram of FIG. It is done.

[0025] Further, as shown in FIG. 4 (A), the force generated by the IC cooking heater 30 to release the magnetic field G1 during use is assured from the magnetic field G1 by the electromagnetic shield apron 1 described above. Can be protected.

That is, since the copper layer 5 in the electromagnetic wave shielding sheet 3 used for the electromagnetic wave shielding apron 1 allows the magnetic field G2 to pass through the copper layer 5, as shown in FIG. It can function as a magnetic absorption layer by absorbing the magnetic field G2. The magnetic field absorption effect of the copper layer 5 changes the direction of the lines of magnetic force as shown in the magnetic field G2, and prevents it from passing through the side of the electromagnetic shielding sheet 3 to the back as shown in the magnetic field G1 in the absence of anything. it can.

As described above, the human body can be protected from radio waves and magnetic fields by the electromagnetic wave shielding apron 1 using the electromagnetic wave shielding sheet 3. In particular, even for the IH cooking heater 30 that emits a strong magnetic field, the force S can be blocked so that the magnetic field G2 emitted by the IH cooking heater 30 does not reach the human body!

[0028] In addition, the magnetic field G2 prevents the magnetic field G2 from wrapping from the side to the back of the electromagnetic wave shield apron 1 by the magnetic field absorption function of the copper layer 5, so that it does not cover the entire front, back, left and right of the human body like a shirt. The electromagnetic shield apron 1 that exists mainly only on the front of the human body can prevent the magnetic field G2 from the front from wrapping around and reaching the human body, and can prevent the magnetic field G2 from adversely affecting the cardiac pacemaker P.

[0029] Further, since the aluminum layer 7 is disposed on the back side of the copper layer 5, the aluminum layer 7 can reliably block the magnetic field G2 from passing to the human body side. In particular, since the carbon layer 6 serving as an insulating layer is sandwiched between the copper layer 5 and the aluminum layer 7, both the magnetic field absorption function by the copper layer 5 and the magnetic field cutoff function by the aluminum layer 7 are effectively exhibited. The magnetic field can be cut off efficiently.

[0030] The thickness of the copper layer 5 is about 35 microns, the thickness of the aluminum layer 7 is about 7 microns, and the carbon layer

By making the thicknesses 6 and 8 thinner, sufficient electromagnetic wave shielding performance can be obtained and the flexibility of the electromagnetic wave shielding sheet 3 can be secured. Therefore, this electromagnetic wave shield Even if the electromagnetic wave shielding apron 1 using the sheet 3 is worn, the user does not feel that it is stiff, but it can be used with the appropriate force S.

[0031] In this embodiment, an appropriate garment such as an upper garment, pants, skirt, muffler, gloves, and underwear is formed using the force / electromagnetic wave shield sheet 3 on which the outer shape electromagnetic shield apron 1 is formed. You can also

[0032] Further, the copper layer 5 may be formed of a strong iron material to be an iron layer, a nickel material to be a nickel layer, or a zinc material to be a zinc layer. In this case, the thickness of the iron layer, nickel layer, or zinc layer is preferably 10 microns or more, more preferably 20 microns or more, and more preferably about 35 microns. Even in this case, the magnetic layer G2 can be absorbed by the iron layer, the nickel layer, or the zinc layer, and the wraparound of the magnetic field G2 can be prevented.

[0033] The carbon layers 6 and 8 may be formed of a force S formed of a carbon material, not limited to this, and other insulating members. Even in this case, the magnetic field absorption performance of the copper layer 5 (or iron layer) and the magnetic field cutoff performance of the anoromi layer 7 can be effectively exhibited.

[0034] Further, the electromagnetic wave shielding sheet 3 may be subjected to processing for ensuring air permeability and flexibility. For example, as shown in the perspective view of FIG. 5, a plurality of holes 11 may be provided to provide an electromagnetic wave shield sheet 3a having good air permeability. In this case, the diameter of the hole 11 may be 1.5 mm or less, and is preferably about lmm. The thickness and material of each layer constituting the electromagnetic wave shielding sheet 3a may be the same as those in the above-described embodiment.

[0035] Thereby, the air permeability can be improved, and the flexibility is improved as compared with the case where there is no hole 11, and the feeling of stiffness can be eliminated. Therefore, it is possible to improve the wearing feeling from both the breathability and flexibility. In addition, even if a plurality of minute holes 11 are formed in this way, the force is sufficient to block electromagnetic waves.

Further, as shown in the perspective view of FIG. 6, a plurality of dimples (recesses) 13 may be provided to form an uneven electromagnetic shielding sheet 3b. In this case, the dimple 13 may be formed such that the copper layer 5 side is concave and the aluminum layer 7 side is convex, or the copper layer 5 side is convex and the aluminum layer 7 side is concave. The thickness and material of each layer constituting the electromagnetic wave shielding sheet 3a may be the same as those in the above-described embodiment. As a result, the electromagnetic wave shielding sheet 3 without unevenness Can also improve flexibility and improve the feeling of wearing. In addition, the presence of dimples 13 reduces the space between close contact with the human body.

Example 2

FIG. 7 shows a front view of the electromagnetic wave shielding apron 1A of Example 2, and FIG. 8 shows a cross-sectional view of the electromagnetic wave shielding cloth 2A.

As shown in the front view of FIG. 7, the electromagnetic wave shielding apron 1 A is configured to be large enough to cover the front surface of the user M from the lower neck to the thigh with the electromagnetic wave shielding cloth 2A. For this reason, when the user M wears the electromagnetic wave shield apron 1, the entire front surface of the cardiac pacemaker P is covered with the electromagnetic wave shield apron 1A as viewed from the front.

[0038] As shown in the cross-sectional view of FIG. 8, the electromagnetic shielding cloth 2A is configured by superposing and arranging the cloth layers 4 and 9 on the front and back of the electromagnetic shielding sheet 3 formed into a sheet having a constant thickness. ing. In addition, the portion where the cardiac pacemaker P is provided is superposed on the electromagnetic shielding sheet 3 and the electromagnetic shielding reinforcing sheet 3c is superposed. This electromagnetic wave shield reinforcing sheet 3c is formed in a larger area than the cardiac pacemaker P. As a result, when the wearer of the electromagnetic wave shield apron 1A is viewed from the front, the cardiac pacemaker P fits properly in the electromagnetic wave shield reinforcing sheet 3c, and even if the user M slightly changes the direction up, down, left and right, direct electromagnetic waves are generated. It is configured to be shielded by the electromagnetic wave shield reinforcing sheet 3c.

[0039] The electromagnetic wave shielding sheet 3 is made of the same material as in Example 1. The electromagnetic wave shielding sheet 3 omits one or more of the copper layer 5, the carbon layer 6, the aluminum layer 7, and the carbon layer 8, or forms one or more layers thinner than the first embodiment. For example, it is preferable that the electromagnetic wave shielding sheet 3 is made thin so that the overall thickness is reduced to increase flexibility. Thus, a wear feeling can be made favorable by improving a softness | flexibility.

[0040] The electromagnetic wave shielding reinforcing sheet 3c is made of the same material as the electromagnetic wave shielding sheet 3 of Example 1, or is made of one or both of an electromagnetic wave absorbing material such as copper, carbon, and aluminum, or an electromagnetic wave shielding material. It is good to comprise with an appropriate material. This electromagnetic wave Covering the vicinity of the heart pacemaker P with the shield reinforcement sheet 3c improves the electromagnetic shielding performance near the heart pacemaker P compared to other parts.

[0041] The above electromagnetic shielding apron 1A makes it extremely important to shield electromagnetic waves.

In this embodiment, the electromagnetic wave can be blocked with a strong force and the electromagnetic wave can be blocked appropriately for other parts.

[0042] In addition, the electromagnetic wave reinforcing sheet except for the parts where the electromagnetic wave shielding is very important.

Since 3c does not exist, it is more flexible than the portion where the electromagnetic wave shield reinforcing sheet 3c exists, and a good wearing feeling can be obtained.

[0043] Further, since the electromagnetic wave shielding sheet 3 is present around the electromagnetic wave shielding reinforcing sheet 3c, the electromagnetic wave is prevented from wrapping around and reaching the protection target part (in this example, the heart pacemaker P). it can.

[0044] In this way, it is possible to reliably shield electromagnetic waves on important parts and to improve the feeling of wearing clothes.

V, conflicting issues can be reconciled.

[0045] In addition, by using the electromagnetic wave shield reinforcing sheet 3c, it is possible not only to ensure the electromagnetic wave shielding performance at a position 30 cm away from the heater part of the IH cooking heater, which is a WHO standard, for example, the user leans forward. Assuming that the heater is close to the heater part of the IH cooking heater, use the force S to obtain sufficient electromagnetic wave shielding performance at a distance of about 10 cm from the heater part.

[0046] The position of the electromagnetic wave shield reinforcing sheet 3c is not limited to the position of the cardiac pacemaker P, and may be formed in the abdomen assuming a pregnant woman. In this case, due to the characteristics of the IH cooking heater, the strongest near the user's abdomen, which is horizontal from the heater! /, The magnetic field irradiation force S, and this strong magnetic field must be reliably prevented by the electromagnetic wave shield reinforcing sheet 3c. Can do.

[0047] Further, in Example 2, the electromagnetic shielding sheet 3c is superposed on the electromagnetic shielding sheet 3, so that it is highly necessary to prevent electromagnetic waves, and the electromagnetic shielding performance of the part is high. Force that realized a shape with low electromagnetic wave shielding performance in other areas Not limited to this, for example, different materials are used in areas where electromagnetic wave shielding is very important and other areas, and electromagnetic wave shielding performance in important areas is increased. May be realized. Even in this case, the same effect can be obtained. Example 3

FIG. 9 shows a cross-sectional view of the electromagnetic wave shielding body 20 and the electromagnetic wave shielding clothing IB of Example 3.

Yes

Since the electromagnetic wave shielding garment 1 B is the same as the electromagnetic wave shielding garment 1 of the first embodiment, detailed description thereof is omitted. The electromagnetic shielding sheet 3 employed in the electromagnetic shielding clothing 1B may be formed thinner than the first embodiment or may be formed with a different material distribution.

[0049] An electromagnetic wave shielding body 20 is attached to the electromagnetic wave shielding garment 1B. The electromagnetic wave singlered body 20 is polymerized and arranged in this order, such as the cloth layer 20, the electromagnetic sinored layer 22, the surface fastener layer 23, and the force surface force.

[0050] The fabric layer 20 is made of the same material as the fabric layers 4 and 9 of the first embodiment.

The electromagnetic wave shielding layer 22 is made of the same material as the electromagnetic wave shielding sheet 3 of Example 1. The electromagnetic wave shielding layer 22 can be made of an appropriate material, such as an electromagnetic wave absorbing material such as copper, carbon, or aluminum, or an electromagnetic wave shielding material.

The hook-and-loop fastener layer 23 is formed by hook-and-loop fasteners that can be attached to and detached from clothes.

[0051] With the above configuration, the electromagnetic wave shielding body 20 can be attached to an arbitrary part of the electromagnetic wave shielding garment 1B, and the electromagnetic wave shielding performance of the part can be enhanced. By separating the electromagnetic wave shielding body 20 and the electromagnetic wave shielding garment 1B in this way, the electromagnetic wave shielding garment 1B enhances the feeling of wearing with weak electromagnetic wave shielding performance. Can be reinforced.

[0052] Further, the electromagnetic wave shielding body 20 can be removed and only the electromagnetic wave shielding clothing 1B can be washed. For this reason, the electromagnetic wave shielding body 20 can be made of a material that is not suitable for washing.

[0053] Further, the electromagnetic wave shielding body 20 can be attached to a normal garment to protect it! /, And electromagnetic waves to the part can be stored.

[0054] Because it is easy to attach and detach as described above, if it is a user of a cardiac pacemaker, an electromagnetic wave shield 20 is attached to the position where the cardiac pacemaker is present. If it is a pregnant woman, The electromagnetic wave shield position can be changed according to the application, such as attaching the electromagnetic wave shield 20 to the position of the abdomen.

[0055] It should be noted that the hook and loop fastener layer 23 is not limited to the hook and loop fastener, and can be formed of a mounting member that can be attached to and detached from clothes such as a button or an adhesive surface.

[0056] In the correspondence between the configuration of the present invention and the above-described embodiment,

The electromagnetic wave shielding garment of the present invention corresponds to the electromagnetic wave electromagnetic wave apron 1, 1A, 1B of the embodiment,

Similarly,

The first electromagnetic shielding sheet corresponds to the electromagnetic shielding sheet 3 of Example 2, the second electromagnetic shielding sheet corresponds to the electromagnetic shielding reinforcing sheet 3c,

The fabric corresponds to the fabric layers 4 and 9,

The electromagnetic wave absorbing layer corresponds to the copper layer 5,

The electromagnetic wave shielding layer corresponds to the aluminum layer 7,

The mounting part corresponds to the hook-and-loop fastener layer 23,

The present invention is not limited to the configuration of the above-described embodiment, and can provide many embodiments.

Claims

The scope of the claims

[1] An electromagnetic wave shielding sheet that blocks electromagnetic waves and protects an object to be protected from electromagnetic waves, an electromagnetic wave absorbing layer that absorbs electromagnetic waves,

An electromagnetic wave shielding layer for shielding electromagnetic waves,

The electromagnetic wave shielding layer is disposed on the protection target side from the electromagnetic wave absorbing layer.

Electromagnetic wave shield sheet.

[2] The electromagnetic wave absorbing layer was formed to a thickness of 10 microns or more

The electromagnetic wave shielding sheet according to claim 1.

[3] The electromagnetic wave shielding layer was formed to a thickness of about 7 microns or more

The electromagnetic wave shielding sheet according to claim 1 or 2.

[4] An electromagnetic wave shielding garment formed by polymerizing and arranging the electromagnetic wave shielding sheet according to claim 1, 2 or 3.

[5] An electromagnetic wave shielding sheet for shielding electromagnetic waves and the cloth are arranged in a superposition,

An electromagnetic shielding garment in which the electromagnetic shielding sheet is formed into a shape that is highly necessary to prevent electromagnetic waves, has high electromagnetic shielding performance at other parts, and has low electromagnetic shielding performance at other parts.

[6] Arrange the first electromagnetic wave shielding sheet that shields electromagnetic waves and the fabric,

There is a high need to prevent electromagnetic waves! / A second electromagnetic wave shielding sheet that shields electromagnetic waves is superposed at the site.

Electromagnetic shielding clothes.

[7] An electromagnetic shielding sheet that shields electromagnetic waves and the fabric are placed in a superposition, and equipped with a mounting part that can be worn on clothes.

Electromagnetic wave shield body.