JPH081028B2 - Electromagnetic wave shielding rug having a fiber upper surface layer - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electromagnetic wave shielding rug having a fiber upper surface layer. More specifically, the present invention relates to an electromagnetic wave shielding rug having a fiber upper surface layer having a resin backing layer containing amorphous metal powder particles dispersed in a synthetic resin material base material.

[Conventional technology]

With the development and popularization of electronic devices in recent years,
There is a demand for a flooring material or a floor covering capable of protecting these devices from the adverse effects of static electricity and / or electromagnetic waves at the installation location.

Conventionally, for the above-mentioned purpose, an antistatic flooring material in which a high molecular weight polymer material is simply mixed with carbon black and / or ordinary metal powder, or an upper surface layer of a rug is formed of conductive fibers. Alternatively, it has been practically used to form the backing layer of the rug from a conductive material containing carbon powder or carbon fiber, or metal foil or metal powder. However, the floor material or the conductive rug as described above has the purpose of controlling (electrostatic) electricity and does not consider the electric field wave shielding property or the magnetic field wave shielding property. Since the shielding property is insufficient, it is impossible to sufficiently protect the electronic device from the adverse effects of electromagnetic waves.

[Problems to be Solved by the Invention]

The present invention solves the problem of insufficient electromagnetic wave shielding properties of conventional conductive flooring materials, has excellent electromagnetic wave shielding properties, and can sufficiently protect electronic devices from the adverse effects of electromagnetic waves, Moreover, it is intended to provide a new rug having a good appearance and a feeling of use.

[Means for solving the problem]

The electromagnetic wave shielding rug having the fiber upper surface layer of the present invention has a fiber upper surface layer formed by using a fiber material and a backing layer formed on the back surface side of the fiber upper surface layer, and the backing layer is a heavy layer. It is characterized by having a base material made of a united resin material and at least one resin layer containing the amorphous metal powder particles dispersed therein.

[Work]

The polymer resin material used in the present invention can be selected from natural rubber, synthetic rubber and synthetic resin, preferably polyvinyl chloride (PVC), polyurethane, ethylene-vinyl acetate copolymer, isotactic polypropylene, polyethylene. , Polyacrylonitrile, polyester and polyamide, fluorine-containing resin, silicone resin, styrene-
It can be selected from butadiene rubber (SBR), chlorosulfonated polyethylene rubber, polyurethane rubber, butyl rubber, fluorine-containing rubber, silicone rubber and isoprene rubber. The most preferred synthetic resin is PVC, which may include plasticizers, fillers, colorants, stabilizers, various modifiers, and / or bulking agents such as atactic polypropylene, bitumen, and the like.

In the present invention, the base material made of the polymer material may be a porous body or a non-porous solid body.
In general, it is preferable that the rug be formed of a combination of a porous layer and a non-porous layer, a crosslinked resin layer having excellent flame resistance, abrasion resistance and the like, in consideration of the conformability of the rug and the like.

In the resin layer included in the backing layer of the electromagnetic wave shielding rug having the fiber upper surface layer of the present invention, the amorphous metal powder particles dispersed in the polymer resin material matrix are spherical bodies, granular bodies, flaky bodies, It may be fibrous or the like, and its size is not particularly limited, but generally 0.1
It is preferably about 5 mm. The content of the amorphous metal powder in the base material is not particularly limited as long as the object of the present invention is achieved, but it is generally 1 to 70% by weight, preferably 3 to 50% by weight. Is more preferable.

The amorphous metal used in the present invention generally contains iron as a main component, and boron, silicon, carbon, nickel,
It is preferably selected from amorphous alloys obtained by adding one or more selected from cobalt and molybdenum. For example, Allied's trade name METGLAS N
o.2602SC (Fe: 81%, B: 13.5%, Si: 3.5%, C: 2% amorphous alloy), No.2605 S-2 (Fe: 78%, B: 13%, S
i: 9% amorphous alloy, No.2605-CO (Fe: 87 parts, B: 1
4 parts, Si: 1 part, Co: 18 parts amorphous alloy), No.2826
-MB (amorphous alloy of Fe: 40%, Ni: 38%, Mo: 4%, B: 18%) and the like can be used.

In addition to the above-mentioned iron-based alloy system, cobalt-based alloy system (for example, Co ₉₀ Zr ₁₀ , Co ₇₈ Si
₁₀ B ₁₂ , Co ₅₆ Cr ₂₆ C ₁₈ , Co ₄₄ Mo ₃₆ C ₂₀ , Co ₃₄ Cr ₂₈ Mo ₂₀ C ₁₈ ),
Alloys based on nickel (eg Ni ₉₀ Zr ₁₀ , Ni ₇₈ S
i ₁₀ B ₁₂ , Ni ₃₄ Cr ₂₄ Mo ₂₄ C ₁₈ ), and alloys containing other metals as main components (for example, Pd ₈₀ Si ₂₀ , Cu ₈₀ Zr ₂₀ , Nb ₅₀ Ni ₅₀ , T
i ₅₀ Cu ₅₀ ) etc. can also be used.

The above-mentioned amorphous metal powder particles impart good electromagnetic field wave shielding property, especially magnetic field wave shielding property to the electromagnetic wave shielding rug having the fiber upper surface layer of the present invention.

The amorphous metal powder particles used in the present invention may have a plating layer made of a conductive metal formed on at least a part of the outer peripheral surface thereof. Such a conductive metal plating layer is effective for further improving the electromagnetic field wave shielding property of the electromagnetic wave shielding rug having the fiber upper surface layer of the present invention, and particularly for enhancing the electric field wave shielding effect.

The conductive metal used for forming the plating layer is, for example, copper, nickel, cobalt, iron, aluminum, gold,
It can be selected from silver, tin, zinc, and alloys of two or more of these.

A conventional method such as roll kneading, mixer mixing, or kneader kneading may be used for mixing and kneading the polymeric resin material base material and the amorphous metal powder particles.

The resin mixture thus prepared is formed into a sheet having a desired thickness, which is used for producing the rug of the present invention. Such a resin layer may be formed as a combination of a porous layer and a non-porous layer, or may have various flame resistances or may be combined with a fabric layer made of glass fiber or other fiber material. It can be a rug. In the electromagnetic wave shielding rug having the fiber upper surface layer of the present invention, a backing layer including at least one resin layer is formed on the back surface side of the fiber upper surface layer formed of the fiber material.

The fiber upper surface layer used in the electromagnetic wave shielding rug having the fiber upper surface layer of the present invention is made of a fiber material, and there is no particular limitation on the configuration or the shape thereof, a woven fabric, a knitted fabric,
It may be a non-woven fabric, a composite of these, or a napped fabric. However, napped fabrics having a pile layer are generally preferred. For example, the upper surface layer of the fiber made of the raised fabric is constituted by a base fabric layer and a pile layer made of a pile extending from the base fabric layer.

There is no particular limitation on the type of fiber forming the upper surface layer of the fiber, and natural fibers such as cotton, hemp, and wool, polyester, polyethylene, polypropylene, nylon 6, nylon 6
6, may be formed by using one or more kinds of synthetic fibers such as synthetic polymer such as acrylic polymer and semi-synthetic fiber such as cellulose acetate, and further, glass fiber,
Carbon fibers and metal fibers may be mixed. These fibers may be cotton-like or yarns (spun or multifilament yarns), tape yarns, split yarns or monofilaments with circular or irregular cross section,
It may be used in any shape such as a flat monofilament. Further, the cloth used for the upper surface layer of the fiber may be any of known cloths such as cut pile cloth, loop pile cloth, needle punch cloth and tufted cloth. The fiber upper surface layer may contain a conductive material such as carbon fiber or metal fiber.

There is no particular limitation on the basis weight and thickness of the upper surface layer of the fiber, but generally, the basis weight of 200 to 2,000 g / m ² and 5 to
Those having a thickness of 20 mm are preferred.

In the rug comprising the fiber upper surface layer and the backing layer of the present invention, the backing layer contains at least one layer of the amorphous metal powder-containing resin content. That is, the backing layer may be composed of a single resin layer, but it may contain two or more resin layers having a content of amorphous metal powder and different composition and characteristics from each other. Alternatively, a fiber lower surface layer formed of a fiber material may be further formed on the lowermost surface of one or more resin layers. In a rug having two or more resin layers, at least one amorphous metal-containing resin layer is excluded, and the other resin layers do not contain amorphous metal powder particles,
For example, it may be a weight layer containing a large amount of filler, a warp prevention layer, or the like.

When the electromagnetic wave shielding rug having the fiber upper surface layer of the present invention has two or more resin layers, at least one fiber reinforcing layer made of a fiber material may be disposed in the middle of them.

The fiber material layer in the backing layer, that is, the basis weight (weight) and the thickness of the fabric forming the fiber lower surface layer and / or the fiber reinforcing layer is not particularly limited, but for example, between the resin layer of the backing layer. If the arrangement is the fiber-reinforced layer preferably has a basis weight of 10 to 200 g / m ^2, it is further preferred to have a basis weight of 50 to 150 g / m ^2. In the case of the fiber lower surface layer,
The basis weight is preferably 10 to 100 g / m ² , 20 to 70 g
More preferably, it is / m ² .

When the fiber-reinforced layer and / or the fiber underside layer is placed in the backing layer, the fabric forming it is impregnated with a portion of the polymeric resin material forming the resin layer and has suitable hardness and rigidity. Like

Also, in the lower fiber layer, a part of the polymer resin material may be impregnated to give appropriate hardness and rigidity. If a small amount of the polymer is oozed to the back of the lower fiber layer, the rug slips. It shows the stopping effect.

As described above, there is no particular limitation on the type of the fiber and the cloth forming the fiber reinforcing layer and / or the fiber lower surface layer, and the cloth may be any of a woven fabric, a knitted fabric and a non-woven fabric. Most preferred are knitted or non-woven fabrics.
There is no particular limitation on the types of fibers forming these cloths, and glass fibers, polyester fibers, polyamide fibers,
Either polypropylene fiber or rayon fiber may be used, but glass fiber and polyester fiber are preferred.

There are no particular restrictions on the location of the fiber-reinforced layer.
Alternatively, it may be arranged in the intermediate layer portion.

The electromagnetic wave shielding rug having a surface layer on the fiber of the present invention may be in the form of a long carpet. However, such a long carpet is troublesome to carry, carry in, and underlay, and when it is locally soiled, it cannot be locally converted, and local repair is significantly impaired in appearance. There is a problem such as U.

As a floor covering material for solving the above-mentioned problems, in recent years, various shapes, for example, tiles such as squares, rectangles, and rhombuses, in particular, tile carpets having a fiber upper surface layer have been used. It was Such a tiled flooring material can be easily transported, carried in, and constructed, can be locally replaced, and can be combined with tiled flooring materials of various colors to form a desired pattern. It has the advantages of

The electromagnetic wave shielding rug having a fiber upper surface layer of the present invention may be in the form of a tile carpet having the above advantages.

The electromagnetic wave shielding rug having the fiber upper surface layer of the present invention has an excellent protective effect for electronic devices.

The protection effect of the electronic device means an effect of absorbing or reflecting the electromagnetic wave energy by the electromagnetic wave shielding means so that the electronic device is not affected by the electromagnetic wave energy. The degree of electromagnetic field wave energy attenuation by this electromagnetic field wave shield means is expressed in a unit decibel (dB), and as the electromagnetic wave shield material has a larger value, the attenuation effect is larger, which is preferable. The electromagnetic wave shielding effect is generally 10
It is preferably dB or more, more preferably 30 dB or more, further preferably 60 dB or more, 90 dB
It is even more preferable that the above is satisfied.

〔Example〕

 The invention is further described by the following examples.

Example 1 A nylon pile carpet having the following constitution was used as a fiber upper surface layer.

Base cloth: Polyester fiber non-woven fabric containing 5% by weight of carbon fiber Pile: Nylon fiber with antistatic ability (length 8mm) Meas: 720g / m ² Amorphous metal powder shown in Table 1 on the back side of the nylon carpet. The granular material-containing PVC resin backing layer composition was diluted with 130 parts by weight of (toluene), and this coating solution was coated to a dry thickness of 1 mm to form a conductive resin layer.

On the back surface of this conductive resin layer, a glass fiber cloth (trademark: KS-2671, manufactured by Kanebo Glass Fiber Co., Ltd., thickness 0.22 mm, basis weight 210 g / m ² , plain weave, warp 19 pieces / 25.4 m
m, weft 19 strands / 25.4mm, fiber tensile strength 350kg / mm ² , fiber breaking elongation 3%, cloth tensile strength, both longitudinal and weft direction 111.6kg /
A fiber reinforcement layer consisting of 3 cm, the breaking elongation of the fabric, and 3.0% in both the longitudinal and latitudinal directions was applied. On the back surface of this fiber reinforced layer, a polyvinyl chloride resin layer containing the amorphous metal powder having a thickness of about 2 mm is formed, and a fiber lower surface layer made of a glass fiber nonwoven fabric having a basis weight of 100 g / m ² is further formed on the back surface thereof. It was attached so that a part of the polyvinyl chloride resin containing the amorphous metal powder was exuded into the lower surface layer of the fiber. The obtained laminated composite was cut into a 50 cm × 50 cm square to obtain a tile carpet.

The electromagnetic wave shielding effect of the electromagnetic wave shielding rug having the fiber upper surface layer was about 55 dB, and the electric field wave shielding effect was 58 dB.

In addition, the electromagnetic field wave shield effect was measured with a magnetic field wave and a plane wave by using a shield field evaluator (TR-17301) for near-field electromagnetic wave manufactured by Takeda Buken Co., Ltd. and a spectrum analyzer (TR-4172). [All are shown by average value of 100 MHz to 600 MHz] Example 2 A rug was prepared in the same manner as in Example 1. However, the resin backing layer composition containing the amorphous metal powder particles shown in Table 1 was diluted with 130 parts by weight of toluene, and the coating solution was used to prepare a rug by the operation described in Example 1. The electromagnetic wave shield rug with the upper surface layer of the fiber showed a magnetic field wave shielding effect of about 60 dB and an electric field wave shielding effect of about 53 dB.

Example 3 A coating solution was prepared by adding 130 parts by weight of toluene to the resin backing layer composition containing the amorphous metal particles shown in Table 1, and using this, the same procedure as in Example 1 was carried out. A rug was made. The obtained rug showed electric field wave shielding property and magnetic field wave shielding property almost similar to the electromagnetic wave shielding rug having the fiber upper surface layer of Example 1.

Comparative Examples 1 and 2 In the same manner as in Example 1, a rug was prepared. However, the first
The resin backing layer composition described in the table was used.

The rug of Comparative Example 1 did not show a shielding property in both electric field and magnetic field. Further, the rug of Comparative Example 2 had a clearly lower shield property in a magnetic field as compared with Examples 1 to 3.

〔The invention's effect〕

The electromagnetic wave shielding rug having a fiber upper surface layer according to the present invention has not only electric field wave shielding property but also good magnetic field wave shielding property because the backing layer contains the amorphous metal powder particles.

Therefore, the electromagnetic wave shielding rug having the fiber upper surface layer of the present invention has a wide range of uses as an electromagnetic wave shielding rug having the fiber upper surface layer capable of shielding electronic devices and the like from the influence of electromagnetic field waves.

Claims (6)

[Claims] 1. A fiber upper surface layer formed by using a fiber material, and a backing layer formed on the back surface side of the fiber upper surface layer, wherein the backing layer comprises a base material made of a polymer resin material. An electromagnetic wave shielding rug having a fiber upper surface layer, which has at least one resin layer containing the amorphous metal powder particles dispersed therein. 2. The electromagnetic wave shielding rug having a fiber upper surface layer according to claim 1, wherein the amorphous metal powder particles have a conductive metal plating layer formed on at least a part of an outer peripheral surface thereof. 3. The fiber upper surface layer according to claim 1, wherein the fiber upper surface layer comprises a base cloth made of a fiber material and a fiber pile layer extending from the base cloth onto the surface thereof. An electromagnetic wave shielding rug that has. 4. The electromagnetic wave shielding rug having a fiber upper surface layer according to claim 1, wherein the backing layer has at least one fiber material layer made of a fiber material. 5. The electromagnetic wave shielding rug having a fiber upper surface layer according to claim 4, wherein the fiber material layer is a fiber reinforcing layer disposed on or in the middle of the resin layer in the backing layer. 6. The electromagnetic wave shielding rug having a fiber upper surface layer according to claim 4, wherein the fiber material layer is a fiber lower surface layer arranged on a lowermost surface side of a backing layer.