JP2599573B2 - Electromagnetic wave shielding rug with fiber upper surface layer - 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 rug having a surface layer on a fiber. More specifically, the present invention provides an electromagnetic wave having a surface layer on a fiber having a resin backing layer containing an amorphous metal powder dispersed in a synthetic resin material base material and a different kind of conductive material additive. It relates to a shielding rug.

[0002]

2. Description of the Related Art In recent years, with the development and spread of electronic devices, these devices have been
There is a need for flooring or floor coverings that can protect against the adverse effects of static electricity and / or electromagnetic waves.

[0003] Conventionally, for the above purpose, the upper surface layer of an antistatic floor material or a rug in which a high molecular weight polymer material is simply mixed with carbon black and / or ordinary metal powder is formed of conductive fibers. For example, the backing layer of a rug is formed of carbon powder or carbon fiber, or a conductive material containing metal foil or metal powder. However, floor materials or conductive rugs as described above are intended to control (electrostatic) electricity, and do not take into account electric or magnetic wave shielding properties. Inadequate performance has prevented electronic devices from being sufficiently protected from the adverse effects of electromagnetic waves.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the problem that the conventional conductive flooring material has insufficient electromagnetic wave shielding properties, has excellent electromagnetic wave shielding properties, and prevents electronic equipment from being adversely affected by electromagnetic waves. The present invention aims to provide a novel rug that can be sufficiently protected from rugs and has a good aesthetic appearance and a feeling of use.

[0005]

According to the present invention, there is provided an electromagnetic wave shielding rug having a fiber upper surface layer, comprising: a fiber upper surface layer formed by using a fiber material; and a backing layer formed on the back side of the fiber upper surface layer. Wherein the backing layer comprises a base material made of a polymer resin material, an amorphous metal powder dispersed therein, and at least one kind of conductive material additive different from the base material. It has at least one resin layer.

[0006]

The resin layer in the electromagnetic wave shielding rug having a surface layer on the fiber according to the present invention comprises a base material made of a polymer resin, amorphous metal particles dispersed therein and a conductive material different from the same. Agent. The polymer resin material used in the present invention can be selected from natural rubber, synthetic rubber and synthetic resin, and is preferably polyvinyl chloride (PVC), polyurethane, ethylene-vinyl acetate copolymer, isotactic polypropylene, polyethylene. , Polyacrylonitrile, polyester and polyamide, fluorine-containing resin, silicone resin, styrene-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 extenders such as atactic polypropylene, bitumen, and the like.

In the present invention, the matrix made of a 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.

[0008] In the resin layer included in the backing layer of the electromagnetic wave shielding rug having a surface layer on the fiber according to the present invention, the amorphous metal particles dispersed in the polymer resin material base material include:
Any of a spherical body, a granular body, a flake-like body, a fibrous body, and the like may be used, and the size thereof is not particularly limited, but generally about 0.1 to 5 mm is preferable. 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.
The content is preferably 0% by weight, more preferably 3 to 50% by weight.

The amorphous metal used in the present invention comprises:
Generally, iron is the main component, and boron, silicon, carbon,
It is preferable to be selected from an amorphous alloy obtained by adding at least one selected from nickel, cobalt, molybdenum, and the like. For example, Allied's trade name METGLAS No. 2602SC (Fe: 81%,
B: 13.5%, Si: 3.5%, C: 2% amorphous alloy), No. 2605 S-2 (78% Fe:
B: 13%, Si: 9% amorphous alloy);
2605-CO (87 parts of Fe, 14 parts of B, Si: 1)
Part, Co: 18 parts of an amorphous alloy), No. 282
6-MB (Fe: 40%, Ni: 38%, Mo: 4%,
B: 18% amorphous alloy).

[0010] In addition to the above-mentioned alloys containing iron as a main component,
An alloy system containing cobalt as a main component (for example, Co₉₀Zr
_Ten, Co₇₈Si_TenB₁₂, Co₅₆Cr₂₆C₁₈, Co₄₄Mo
₃₆C ₂₀, Co₃₄Cr₂₈Mo₂₀C₁₈), Nickel as main component
Alloy system (for example, Ni₉₀Zr_Ten, Ni₇₈Si
_TenB₁₂, Ni₃₄Cr_{twenty four}Mo_{twenty four}C₁₈), And other gold
Alloys based on metals (eg, Pd₈₀Si₂₀, Cu₈₀
Zr₂₀, Nb₅₀Ni₅₀, Ti ₅₀Cu₅₀) Etc. are also available
You.

The amorphous metal particles as described above impart good electromagnetic wave shielding properties, particularly excellent magnetic wave shielding properties, to the electromagnetic wave shielding rug having a surface layer on the fiber of the present invention.

The amorphous metal powder 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 further improves the electromagnetic wave shielding property of the electromagnetic wave shielding rug having the fiber upper surface layer of the present invention,
In particular, it is effective to enhance the electric field wave shielding effect.

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

In the electromagnetic wave shielding rug having a surface layer on the fiber according to the present invention, the resin layer is formed by adding, in addition to the amorphous metal particles dispersed in the polymer resin material base material,
It contains at least one different kind of conductive material additive.

The different conductive material additives useful in the present invention include:
It can be selected from non-amorphous metal powder, non-metal conductive material powder, conductive organic material and the like. Non-amorphous metal particles have good conductivity and electromagnetic wave shielding effect, especially excellent electric wave shielding effect, for example, copper, nickel, cobalt, iron, aluminum,
It can be selected from gold, silver, tin, zinc, and compounds containing at least one of these, and alloys such as stainless steel, brass, bronze, nickel silver, and the like. These powders and granules may be any of spheres, granules, flakes, and fibrous bodies, and the size thereof is
It is preferably about 0.1 to 5 mm. Further, the content of the non-amorphous metal powder in the base material is preferably set so that the total content of the additives in the base material is in the range of 1 to 70%.

The powder of the non-metallic conductive material used in the present invention can be selected from carbon black, graphite, carbon fiber and the like, and its size and content are the same as those of the non-amorphous metal powder. Can be set. The conductive organic material used in the present invention can be selected from, for example, a conductive plasticizer or a conductive polymer material.

The conductive plasticizer is, for example, a polycarboxylic acid ester compound of a mono- or poly-alkylene glycol monoalkyl ether, and is exemplified by the following general formulas (I), (II) and (III):

Embedded image(Where X is a substituent having 2 to 8 carbon atoms,
Aliphatic, cycloaliphatic and aromatic polysalts with and without
Y represents a member selected from the group consisting of basic acid residues;
Substituted, unsubstituted and unsubstituted cyclohexane
Represents a member selected from a xan ring, and Z is a carbon atom having 2 to 2
22, aliphatic with and without substituents,
One selected from alicyclic and aromatic carboxylic acid residues
A member₁, A_Two, A_Three, A_FourAnd A_FiveIs
Each independently of the other, from alkylene groups of 2 to 4 carbon atoms
Represents a selected member, R₁, R_Two, R_Three, R_Fourand
R_FiveIs a linear group having 1 to 15 carbon atoms independently of each other
Or represents a member selected from a branched alkyl group,
Where A₁And R₁, A_TwoAnd R_Two, A_ThreeAnd R_Three, And A _Four
And R_Four, The total number of carbon atoms of which is 5 to 17,₁,
m_Two, M_ThreeAnd m_FourAre each independently 1-7
Represents an integer of n₁Represents an integer of 1 to 5, and n_TwoIs
Represents an integer of 1 or 3 to 6, and 1 (el) represents 1 to
Represents an integer of 7, and n_TwoIs 3 to 6, n_TwoPieces of CO
O (A_FiveO)_lR_FiveL and R in the group_FiveIs
Each may be different or identical.
No. ) Can be selected from a group of compounds
You.

The mono- and poly-alkylene glycol monoalkyl ethers used in the production of the conductive ester compound are, for example, the addition of propanol with 1 to 7 mol of ethylene oxide, 1 to 4 mol of propylene oxide or 1 to 3 mol of butylene oxide. Compound: Addition of butanol with 1 to 6 mol of ethylene oxide, 1 to 4 mol of propylene oxide or 1 to 3 mol of butylene oxide Compound: Hexanol and 1 to 5 mol of ethylene oxide, 1 to 3 mol of propylene oxide or 1 to 1 mol of butylene oxide
Addition compound with 2 mol: 1-5 mol of heptanol and ethylene oxide, 1-3 mol of propylene oxide or 1-2 mol of butylene oxide: 1-4 mol of octanol and ethylene oxide, 1 propylene oxide
~ 3 mol or addition compound with 1 to 2 mol of butylene oxide: addition compound of nonanol with 1 to 4 mol of ethylene oxide, 1 to 2 mol of propylene oxide or 1 to 2 mol of butylene oxide: decanol and 1 to 2 mol of ethylene oxide
Addition compound of 3 mol, 1 to 2 mol of propylene oxide or 1 mol of butylene oxide: 1 to 2 mol of dodecanol and ethylene oxide, addition compound of 1 mol of propylene oxide or 1 mol of butylene oxide: 1 to 2 mol of tridecanol and 1 to 2 mol of ethylene oxide, propylene Oxide 1
Or an addition compound of 1 mole of butylene oxide: an addition compound of 1 mole of ethylene oxide and 1 mole of propylene oxide, and an addition compound of 1 mole of ethylene oxide with pentadecanol.

The dicarboxylic acids used for producing the conductive ester compound of the above formula (I) include adipic acid, azelaic acid, sebacic acid, succinic acid, brassic acid, tetrahydrophthalic acid and phthalic acid. Can be The carboxylic acid used for producing the conductive ester compound of the above formulas (II) and (III) is a monocarboxylic acid,
It is a trivalent or more polyvalent carboxylic acid or a divalent carboxylic acid having an epoxycyclohexane ring. These carboxylic acids are methyl groups, lower alkyl groups such as ethyl groups, hydroxyl groups,
It may have a substituent containing a hetero atom such as oxygen, silicon, or halogen.

The monocarboxylic acid has 2 to 2 carbon atoms.
Two aliphatic monocarboxylic acids can be used. Further, the polybasic acid is an aliphatic, alicyclic or aromatic polybasic acid comprising a carboxylic acid residue having 3 to 8 carbon atoms,
Specifically, citric acid, aconitic acid, butanetricarboxylic acid, aliphatic polycarboxylic acids such as butanetetracarboxylic acid, alicyclic carboxylic acids such as epoxyhexahydrophthalic acid, trimellitic acid, pyromellitic acid, etc. Aromatic polycarboxylic acids and acid anhydrides of these carboxylic acids can be used. These carboxylic acids may be used alone or as a mixture of two or more.

In the present invention, when the above-described conductive plasticizer is mixed with the base material of the resin layer, the conductive plasticizer has the same chemical and physical properties as general plasticizers. Therefore, the amount of other plasticizers can be appropriately reduced according to the amount of the conductive plasticizer added.

A conductive polymer material as a conductive organic material;
For example, π such as polyacetylene, polyphenylene, etc.
Electron conjugated polymer material, metal coordination polymer material such as metal phthalocyanine, charge transfer complex polymer composed of electron donor and electron acceptor such as tetrathiofulvalene and tetracyanooxydimethane complex Material or fourth
Grade ammonium salt-type polymer materials, chlorosulfonic acid-type polymer materials, and the like can also be used.

The content of the conductive organic material is not particularly limited, but is preferably set within a range where the total content of the added substances in the base material is 1 to 70% by weight.

For mixing and kneading the polymer resin material base material, the amorphous metal powder and the different conductive material additive, conventional methods such as roll kneading, mixer mixing and kneader kneading may be used. The resin mixture thus prepared is formed into a sheet having a desired thickness, which is used in the production of 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,
Various rugs can be obtained by combining with a fabric layer made of fire-resistant or glass fiber or other fiber material.

In the electromagnetic wave shielding rug having a fiber upper surface layer according to 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 a 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 fibrous material, and there is no particular limitation on the configuration or shape thereof, and a woven fabric
Any of a knitted fabric, a nonwoven fabric, a composite thereof, or a nap fabric may be used. However, a raised fabric having a pile layer is 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. Natural fibers such as cotton, hemp and wool, polyester, polyethylene, polypropylene, nylon 6,
It may be formed using at least one kind of synthetic fibers formed from synthetic polymers such as nylon 66 and acrylic polymers, and semi-synthetic fibers such as cellulose acetate. Further, glass fibers, carbon fibers, and metal fibers may be used. May be mixed. These fibers may be used in any form, such as floc, or yarn (spun or multifilament yarn), tape yarn, split yarn, or monofilaments having a circular or irregular cross section, flat monofilaments, and the like. 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 upper surface of the fiber may contain a conductive material such as carbon fiber or metal fiber.

The basis weight and thickness of the upper surface layer of the fiber are not particularly limited, but are generally 200 to 2,000.
Those having a basis weight of g / m ² and a thickness of 5 to 20 mm are preferred.

In the rug comprising the fiber outer surface layer and the backing layer according to the present invention, the backing layer contains at least one layer of the above-mentioned resin layer containing the amorphous metal particles. That is, the backing layer may be composed of a single resin layer, but includes an amorphous metal powder-containing layer, but includes two or more resin layers having different compositions and characteristics from each other. Alternatively, a lower fiber surface layer made 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, except for at least one amorphous metal-containing resin layer, the other resin layers do not contain amorphous metal particles, for example, a weight containing a large amount of filler. A layer, a warp prevention layer, and others may be used.

In the case where the electromagnetic wave shielding rug having the upper surface layer of the fiber of the present invention has two or more resin layers, even if at least one fiber reinforcing layer formed of a fiber material is disposed between them. Good. Fiber material layer in the backing layer,
That is, the basis weight (weight) and the thickness of the fabric forming the fiber lower layer and / or the fiber reinforcing layer are not particularly limited. For example, in the case of the fiber reinforcing layer disposed between the resin layers of the backing 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 layer, the basis weight is 1
The basis weight is preferably 0 to 100 g / m ² ,
More preferably, it is 70 g / m ² .

When the fiber reinforcing layer and / or the fiber lower surface layer is disposed in the backing layer, the fabric forming the same impregnates a part of the polymer resin material forming the resin layer to obtain an appropriate hardness or rigidity. It will have the nature. 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 types of fibers and fabrics forming the fiber reinforcing layer and / or the fiber lower surface layer. The fabric may be any of woven fabric, knitted fabric and non-woven fabric. Woven or knitted or non-woven fabrics are most preferred. There is no particular limitation on the type of fiber forming these cloths, and any of glass fiber, polyester fiber, polyamide fiber, polypropylene fiber, rayon fiber and the like may be used, but glass fiber and polyester fiber are preferred.

There are no particular restrictions on the position of the fiber reinforcing layer. For example, the fiber reinforcing layer may be disposed on the upper layer portion (position close to the upper surface layer of the fiber) or on 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 long carpets are troublesome to transport, carry in, and bedding, and when there is localized contamination, local replacement is not possible, and local repair is extremely unsightly. And other problems.

As the floor covering material for solving the above-mentioned problems, various shapes such as tiles such as squares, rectangles and rhombuses, especially tile carpets having a fiber upper surface layer have been used in recent years. It has become 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 a surface layer on the fiber according to the present invention has an excellent protective effect on electronic equipment. 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 attenuation of the electromagnetic wave energy by the electromagnetic wave shielding means is expressed in a unit of decibel (dB). As the electromagnetic wave shielding material is larger, the attenuation effect is larger and more preferable. Generally, the electromagnetic wave shielding effect is preferably 10 dB or more, more preferably 30 dB or more, and 60 dB or more.
It is more preferably at least dB, and even more preferably at least 90 dB.

[0035]

The present invention is further described by the following examples. Example 1 A nylon pile carpet having the following structure was used as a surface layer on a fiber. Base fabric: polyester fiber nonwoven fabric containing 5% by weight of carbon fiber Pile: nylon fiber having antistatic ability (length 8 mm) Weight: 720 g / m ² Amorphous having the composition shown in Table 1 on the back of the above nylon carpet The metal powder-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 the conductive resin layer, a glass fiber cloth (trade name: KS-2671, manufactured by Kanebo Glass Fiber Co., Ltd., thickness 0.22 mm, basis weight 210 g / m ² , plain weave, warp 19/2)
5.4mm, 19 wefts / 25.4mm, fiber tensile strength 35
0 kg / mm ² , elongation at break of fiber 3%, tensile strength of fabric, 111.6 kg / 3 cm in both longitudinal directions, and elongation at break in fabric and 3.0% in both longitudinal directions).
The amorphous metal powder-containing polyvinyl chloride resin layer having a thickness of about 2 mm is formed on the back surface of the fiber reinforcing layer, and a fiber lower surface layer made of a 100 g / m ² basis weight glass fiber nonwoven fabric is further formed on the back surface. By sticking, a part of the polyvinyl chloride resin containing the amorphous metal powder was soaked into the fiber lower surface layer. The obtained laminated composite was sized at 50 cm ×
It was cut into a 50 cm square to make a tile carpet. The electromagnetic wave shielding effect of the electromagnetic wave shielding rug having the surface layer on the fiber was about 75 dB, and the electric field wave shielding effect was 68 dB.

The electromagnetic wave shielding effect was measured using a near-field electromagnetic shielding material evaluator (TR-1) manufactured by Takeda Riken.
7301) and a spectrum analyzer (TR-417)
2) was used in combination, and was performed on a magnetic field wave and a plane wave (both are shown by average values of 100 MH _{2 to} 600 MH ₂ )

Example 2 A rug was produced in the same manner as in Example 1. However, the composition of the resin backing layer containing the amorphous metal particles shown in Table 1 was 1
This coating liquid was used after dilution with 30 parts by weight of toluene.
The electromagnetic wave shielding rug having a surface layer on the fiber is about 76
A magnetic field wave shielding effect of dB and an electric field wave shielding effect of about 68 dB were exhibited.

Examples 3 to 12 In the same manner as in Example 1, rugs were produced. However, 130 parts by weight of toluene was further added to the amorphous metal powder-containing resin backing layer composition shown in Table 1 to prepare a coating liquid, which was used. Each of the obtained rugs exhibited almost the same electric and magnetic wave shielding properties as the electromagnetic wave shielding rug having a surface layer on the fiber of Example 1.

Comparative Examples 1-3 A rug was produced in the same manner as in Example 1. However, the resin backing layer composition shown in Table 1 was used. The rug of Comparative Example 1 is
No shielding property was exhibited in any of the electric field and the magnetic field, and the rug of Comparative Example 2 had a low shielding property in the magnetic field. The rug of Comparative Example 3 had lower shielding properties in an electric field than those of Examples 1 to 12.

[0041]

[Table 1]

[0042]

The electromagnetic wave shielding rug having a surface layer on the fiber according to the present invention contains an amorphous metal powder and an additive of a different conductive material in the backing layer. Both could be greatly improved. Therefore, the electromagnetic wave shielding rug having a surface layer on the fiber of the present invention has a wide application as a rug capable of shielding electronic devices and the like from the influence of electromagnetic field waves.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location // A47G 27/02 A47G 27/02 C

Claims (7)

(57) [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 is formed of a base material made of a polymer resin material. An electromagnetic wave having a surface layer on a fiber, characterized by having at least one resin layer containing an amorphous metal powder dispersed therein and at least one kind of conductive material additive different from the above. Rug with shielding properties. 2. The electromagnetic wave shielding rug having a surface layer on a fiber according to claim 1, wherein the amorphous metal powder has a conductive metal plating layer formed on at least a part of an outer peripheral surface thereof. 3. The electromagnetic wave having a surface layer on a fiber according to claim 1, wherein the additive of a different conductive material is selected from a non-amorphous metal powder, a non-metal conductive powder, and a conductive organic material. Rug with shielding properties. 4. 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 a surface thereof. Electromagnetic wave shielding rug having. 5. 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. 6. The electromagnetic wave shielding rug having a surface layer on a fiber according to claim 5, wherein the fiber material layer is a fiber reinforcing layer disposed on or in the middle of the resin layer in the backing layer. 7. The electromagnetic wave shielding rug having a fiber upper surface layer according to claim 6, wherein the fiber material layer is a fiber lower surface layer disposed on the lowermost surface side of a backing layer.