JP3229600B2 - Electromagnetic wave shielding material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shielding material for shielding electromagnetic waves. In particular, the present invention relates to an electromagnetic wave shielding material that can be easily processed into a cloth having electromagnetic wave shielding properties.

[0002]

2. Description of the Related Art Conventionally, in order to impart a shielding property against electromagnetic waves to a cloth body, a metal thread composed of thin metal fibers is used for a warp and / or a weft constituting the cloth body, or a cellulose fiber is used. Various cloth bodies that can be shielded by using yarn have been proposed.

[0003] However, although these cloths have a shielding property against electromagnetic waves, they are not suitable as cloth for clothes. Therefore, recently, cloths which can be used for clothes and have a shielding property have been developed. For example, a fabric using an electromagnetic wave shielding material B configured as follows has been proposed.

[0004] As shown in FIG.
A conductive metal such as silver or copper is plated or vapor-deposited on the surface of a fiber made of polyester to generate conductivity in the fiber to form a conductive fiber 10, and a plurality of the conductive fibers 10 are bundled. An electromagnetic wave shielding material B is obtained by twisting the formed conductive yarn and a non-conductive yarn formed by bundling a plurality of non-conductive fibers 20 that have not been subjected to a conductive treatment. By using a non-conductive yarn made of the non-conductive fiber 20 and having excellent touch and moisture absorption, and twisting the conductive yarn, the touch and moisture absorption of the electromagnetic wave shielding material B itself can be improved.

[0005] Then, as shown in Fig. 2, the electromagnetic wave shielding material B is woven into a cloth body as a warp and / or a weft to obtain a cloth for clothes having a shielding property against electromagnetic waves. be able to.

In FIG. 2, C is a conventional non-conductive yarn formed by twisting only the non-conductive fibers 20, and is woven during weaving. By interweaving the conventional non-conductive yarn C, a cloth for clothes more suitable for the purpose can be obtained.

[0007]

However, the conductive yarn composed of the conductive fiber 10 and the non-conductive yarn composed of the non-conductive fiber 20 are twisted to form an electromagnetic wave shielding material B, which is woven and woven. In this case, as shown in FIG.
The conductive metal of the conductive fiber 10 exposed on the surface is easily peeled off during weaving, which has been a cause of deteriorating electromagnetic wave shielding properties. D in FIG. 2 shows a peeled portion.

Further, there is a risk that the conductive metal which has been separated into fine powder form may be sucked or put into the eyes, and there is also a problem in safety.

The present inventor has conducted research and development to prevent the conductive metal adhered to the conductive fiber 10 from peeling off. As a result, the shielding property can be maintained for a long period of time by preventing the conductive metal 10 from peeling off. This has led to the invention of an electromagnetic wave shielding material.

[0010]

According to the present invention, a conductive metal is adhered to one side of a film made of a synthetic resin having a wide band shape to form a conductive metal adhered surface. To provide an electromagnetic shielding material in which the band-shaped yarn is spirally wound around the core yarn with the conductive metal-coated surface inside. In particular, the present invention is also characterized in that a ventilation hole is formed in the band-like yarn.

In addition, a conductive metal is adhered to one side surface to form a conductive metal adhered surface, and a band-like thread made of a synthetic resin having a vent hole is provided inside the conductive metal adhered surface. The present invention provides an electromagnetic wave shielding material spirally wound around a core yarn.

The present invention is also characterized in that the synthetic resin for forming the belt-like yarn is a polyester resin or a nylon resin, the core yarn is a cotton yarn, and the synthetic resin is colored. .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The electromagnetic wave shielding material of the present invention is made of a synthetic resin having a conductive metal adhered to one side surface by vapor deposition or the like to form a conductive metal adhered surface and a vent hole. An electromagnetic wave shielding material in which a band-shaped yarn is spirally wound around a core yarn with the conductive metal-coated surface inside.

Since the conductive metal is not exposed on the outer peripheral surface of the electromagnetic wave shielding material, it is possible to prevent the conductive metal from peeling off during weaving, and to prevent the synthetic resin itself from deteriorating with time. Since there is no possibility that the conductive metal on the surface of the conductive metal is peeled off, the cloth woven from the electromagnetic wave shielding material can maintain the shielding property against electromagnetic waves for a long time.

In particular, by forming a ventilation hole in the band-like yarn, the band-like yarn can be used as an electromagnetic wave shielding material having air permeability and hygroscopicity, and by forming the ventilation hole, the electromagnetic wave shielding material can be made flexible. In addition, the synthetic resin itself that becomes the belt-like yarn is colored, and if necessary, the core yarn can be easily made into an appropriate colored electromagnetic wave shielding material by using the same color yarn. Since the electromagnetic wave shielding material having various color variations can be used, the range of application as clothing fabric can be expanded. Furthermore, it can be used for an electric carpet, an electric blanket, a sheet, a curtain, a wall cloth, and the like.

[0016] Further, by using a polyester resin or a nylon resin as the synthetic resin, the electromagnetic wave shielding material has sufficient flexibility without impairing the weaving property.
Even when the cloth body is formed by weaving, the cloth body can be given sufficient flexibility and can be used as a cloth for clothes.

[0017]

FIG. 1 shows an electromagnetic wave shielding material A2 according to a second embodiment of the present invention, in which silver, which is a conductive metal, is vapor-deposited on one side of a belt-shaped yarn 4 made of a polyester resin. A metal-coated surface 5 is formed, and a large number of air holes 8 are formed. With the conductive metal-coated surface 5 inside, fibers made of a plurality of polyester-based resins are used to form a conductive material such as plating or vapor deposition. The helical yarn is formed by helically winding a core yarn 7 made of a non-conductive yarn in which non-conductive fibers 6 that have not been treated are bundled.

The material of the band yarn 4 is not limited to the polyester resin, but may be a nylon resin or another synthetic resin. Particularly, by using a polyester resin or a nylon resin, flexibility is improved. The electromagnetic wave shielding material A2 can be used to improve the weaving property, and the woven fabric can be finished flexibly.

However, the flexibility of the electromagnetic wave shielding material A2 also depends on the width and the winding state of the band-shaped yarn 4, and the width and the winding state of the band-shaped yarn 4 are appropriately determined so that the required flexibility is obtained. It is used selectively.

Further, a large number of air holes 8 are formed in the band-shaped yarn 4, and by providing the air holes 8, the electromagnetic wave shielding material A2 can be made more flexible.
Since air and moisture can be circulated through the air holes 8, air permeability and moisture absorption can be improved.

The ventilation hole 8 may be formed after the conductive metal-coated surface 5 is formed, or may be formed before the conductive metal-coated surface 5 is formed. The size of the ventilation hole 8 is preferably about 10 μm, but may be larger than 10 μm. In particular, the vent 8
Is performed before the formation of the conductive metal-coated surface 5,
A larger air hole 8 may be formed, and the hole diameter may be reduced by application of a conductive metal so that the required hole diameter is obtained.

In the present embodiment, silver film is formed on a polyester resin film having a wide band shape, silver holes are formed, and then the band yarn 4 having a required width is formed.
To form a band-shaped yarn 4. The conductive metal to be deposited is not limited to silver, and any metal having conductivity may be used.
The conductive metal-coated surface 5 may be formed by plating other than vapor deposition.

The core yarn 7 is not limited to a fiber made of polyester, and a core yarn 7 having required physical properties may be appropriately selected and used. In particular, by using a silk thread or a cotton thread, the air permeability and the moisture absorption can be further improved.

The band-shaped yarn 4 having the conductive metal-coated surface 5 inside.
Is wound around the core thread 7 in a helical manner, so that the conductive metal is not exposed on the outer peripheral surface of the electromagnetic wave shielding material A2, so that it is possible to prevent the conductive metal from peeling during weaving.

In particular, by coloring the band-shaped yarn 4 itself made of a synthetic resin such as a polyester-based resin or a nylon-based resin to form a colored band-shaped yarn 4, the electromagnetic shielding material A2 can be colored. When the electromagnetic wave shielding material A2 is woven into a cloth body, the cloth body can be used as a cloth body capable of shielding against electromagnetic waves not only for clothing but also for various purposes. At this time,
If necessary, the same color yarn is used for the core yarn 7.

In particular, since the countless ventilation holes 8 are formed in the band-shaped yarn 4, the electromagnetic wave shielding material A2 can be provided with air permeability and moisture absorption, and can be made flexible, so that weaving is performed. Thus, it can be used as a cloth or sheets for clothes, a cloth for electric carpet or electric blanket, or a curtain.

[0027]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, a conductive metal is applied to one side of a film made of a synthetic resin having a wide band shape to form a conductive metal-applied surface. The strip is cut to the required width to form a belt-like thread, and the conductive thread is spirally wound around the core thread with the conductive metal-coated surface inside, so that the conductive metal is not exposed on the outer peripheral surface. In this case, the conductive metal can be prevented from peeling off.Furthermore, even if the synthetic resin itself of the band-shaped yarn to which the conductive metal is applied deteriorates with time, the conductive metal-coated surface Since there is no possibility that the conductive metal is peeled off, the shielding property against electromagnetic waves can be maintained for a long period of time. Further, by forming the ventilation holes in the belt-like yarn, the permeability and the hygroscopicity of the electromagnetic wave shielding material can be improved, and the electromagnetic wave shielding material can be given flexibility.

According to the second aspect of the present invention, a conductive metal is adhered to one side surface to form a conductive metal adhered surface, and a belt-like yarn made of a synthetic resin having a vent hole is formed. Since the conductive metal is not exposed on the outer peripheral surface by being spirally wound around the core yarn with the conductive metal-coated surface inside, the conductive metal may peel off when weaving into a cloth. Can be prevented, and even if the synthetic resin itself of the band-shaped yarn to which the conductive metal is applied is deteriorated with time, the conductive metal on the surface to which the conductive metal is applied is not likely to be peeled off. The shielding properties against electromagnetic waves can be maintained for a long period of time, and the ventilation holes can improve the air permeability and the hygroscopicity, and can also impart flexibility to the electromagnetic wave shielding material.

According to the third aspect of the present invention, since the synthetic resin forming the belt-like yarn is a polyester resin or a nylon resin, the electromagnetic wave shielding material can be configured more flexibly. Woven fabric can be enhanced, and the woven fabric itself can be made flexible.

According to the fourth aspect of the present invention, since the core yarn is made of cotton yarn, air permeability and moisture absorption can be further improved.

According to the fifth aspect of the present invention, since the synthetic resin is colored so that the electromagnetic wave shielding material can be appropriately colored, an electromagnetic wave shielding material having various colors is provided. When the same electromagnetic wave shielding material is woven into a cloth body, the cloth body can be used as a cloth body capable of shielding against electromagnetic waves not only for clothing but also for various purposes.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an electromagnetic wave shielding material according to the present invention.

FIG. 2 is an explanatory diagram of a conventional cloth body having a shielding property against electromagnetic waves.

[Explanation of symbols]

 A2 Electromagnetic wave shielding material 4 Strip yarn 5 Conductive metal-coated surface 6 Non-conductive fiber 7 Core yarn 8 Vent hole

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Junichi Mori 181-1 Hie-cho, Hakata-ku, Fukuoka, Fukuoka Prefecture (58) Field surveyed (Int.Cl. ⁷ , DB name) D02G 3 / 00-3/44 H05K 9/00

Claims (5)

(57) [Claims] 1. A conductive metal-coated surface in which a conductive metal is coated on one side surface of a synthetic resin film having a wide band shape.
Form (5), cut the film into the required width and strip
(4), with the conductive metal-coated surface (5) on the inside and a belt-like yarn (4)
With an electromagnetic shielding material wound spirally around the core thread (7)
An electromagnetic wave shielding material characterized in that a ventilation hole (8) is formed in the band-like thread (4) . 2. A method of forming a conductive metal by applying a conductive metal on one side.
Formed metal attachment surface (5) and drilled ventilation holes (8)
A belt-like thread made of synthetic resin (4) is attached to the conductive metal-coated surface (5).
With the inside wound spirally around the core thread (7).
Electromagnetic shielding material to be butterflies. 3. A synthetic resin for forming a belt-like yarn (4),
It is characterized by using a tellurium resin or nylon resin
The electromagnetic wave shielding material according to claim 1 or 2, wherein 4. The electromagnetic wave shielding material according to claim 1, wherein the core yarn (7) is a cotton yarn . 5. The electromagnetic wave shielding material according to claim 1, wherein the synthetic resin is colored .