JP2010123645A - Fine-particle material for preventing electromagnetic wave - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost fine-particle material for preventing an electromagnetic wave to effectively shield and absorb the electromagnetic wave in a wider frequency range among the fine-particle materials for preventing the electromagnetic wave that can be added to a polymer, a plastic material/resin paint or to the basic material of spinning fiber and cement powder or the like. <P>SOLUTION: The fine-particle material for preventing the electromagnetic wave is formed of at least one conductive fine-particle material and the conductive fine-particle material is formed of a granular conductive fine particle including a mixed tube/fiber state structural conductive fine particle or a structural conductive fine particle. A part of the electromagnetic wave absorbing fine-particle material can further be doped into the fine-particle material for preventing the electromagnetic wave in order to enhance capability for absorbing and eliminating or removing the electromagnetic wave. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fine particle material for preventing electromagnetic waves, and in particular, can be added to a base material such as a polymer, a plastic material / resin paint or a spun fiber, cement powder, etc. The present invention relates to a fine particle material for preventing electromagnetic waves, which has a function of shielding and absorbing electromagnetic waves of a wide frequency in a manufactured object or surface treatment material.

  In recent years, the development of electronic science and technology is rapid, and it is developing at a speed of one thousand miles a day. And in order to pursue the convenience of life, the alignment system equipment of various electronic products in today's society gives mankind the infinite convenience of life, but the disturbance of the environment is caused by electromagnetic waves and magnetic fields generated by various electronic equipment. Yes. That is so-called Electro-magnetic Interference (EMI).

  The cause of the generation of electromagnetic waves is mainly due to the occurrence of a certain electromagnetic field during the operation of all electronic equipment. In particular, when the density of the electronic unit is too high, or when the electronic unit has a high-frequency circuit, electromagnetic waves generated during the operation of the electronic equipment can interfere with other electronic equipment and cannot operate normally.

  Therefore, if there is no EMI protection measure, the electromagnetic waves not only affect the operation of other electronic equipment, but the electronic equipment itself is easily disturbed by other electronic equipment. In addition, electromagnetic waves have a significant impact on the health of the human body as well as on the operation of electronic equipment. For this reason, the electromagnetic wave protection standards for electronic products in countries around the world are now increasingly severely restricted.

  Electromagnetic waves in different wavelength ranges are generated by different methods and radiation sources. The longest wavelength (the lowest frequency) is a radio wave generated from the circuit system. On the other hand, the shortest wavelength is an X ray generated from the CRT. This radioactive element emits γ (gamma) rays which are electromagnetic waves having the shortest wavelength (relatively highest frequency). Visible electromagnetic waves that humans can sense from the retina are visible light, but the wavelength range of visible light is between about 0.4 to 0.76 μm.

  Generally speaking, anything that has a wavelength shorter than that of ultraviolet rays with the shortest visible light wavelength of 0.4 μm as a boundary belongs to short-wave electromagnetic waves. And the shorter the wavelength of the electromagnetic wave, the higher the energy level and the more direct damage to human cells. The level of electromagnetic waves with very short wavelengths, such as X-rays or γ (gamma) rays, reaches a level that can destroy cellular DNA, and thus directly damages the human body.

On the other hand, electromagnetic waves of relatively long wavelengths, such as radio waves, mobile phone electromagnetic waves, substations, and high-voltage power transmission towers, all belong to long-wave electromagnetic waves, but the effects on human health are currently present. There is no definite theory. However, basically, exposing a human body to high-intensity electromagnetic waves for a long period of time may cause lesions. The types that cause the main lesions are as follows.
1. An electric current passes through the extracellular matrix (ECM), changing the cell potential.
2. Like the microwave or oven, heat the human tissue moisture to destroy the tissue.
3. Modify the cell by magnetic field effect.
4. Physiologically radiated electromagnetic waves suppress the function of system such as cardiovascular blood vessels, endocrine, immunity, reproduction, etc. and decrease in platelets and white blood cells, causing nervous breakdown, ocular opacity, etc. Severe effects such as birth and accelerated diffusion of cancer cells.

Since there are too many types of electromagnetic waves, the electromagnetic protection technology is considerably complicated. At present, most of the general-purpose electronic products adopt plastic housing materials. However, since the plastic housing is not provided with an electromagnetic wave prevention measure, it is necessary to achieve shielding and absorption of electromagnetic waves through some technical means. A protection method for electromagnetic waves that is widely used in the industry is protection mainly by a metal housing, metal piece, plating, conductive paint, vacuum sputtering, or fine particle material (see, for example, Patent Documents 1 to 3).
JP 2008-042113 A JP 2005-172591 A Japanese Patent Laid-Open No. 2002-367692

  The prior art has the following problems. The problems of the electromagnetic wave protection technique using the conventional metal housing, metal piece, plating, conductive paint, vacuum sputtering method, or fine particle material will be described below.

1. Metal housing This is a housing for electronic products made using highly conductive materials such as metals such as aluminum-magnesium, and shields electromagnetic waves using the electromagnetic wave reflectivity of metal housings. . However, the main drawback of this method is that the manufacturing cost of the metal housing is several tens of times higher than that of the plastic housing, which increases the manufacturing cost.

  Note that since the metal material has a function of slightly shielding electromagnetic waves, after the electromagnetic waves hit the conductive material, phenomena such as reflection, diffraction, and creeping occur again. For this reason, it is still impossible to remove the electromagnetic wave, and the electromagnetic wave leaks from other directions, so that the protective effect of the electromagnetic wave cannot be effectively achieved.

2. Shielding of metal pieces This is a highly conductive material such as white bronze and phosphor bronze manufactured as an anti-electromagnetic wave protection piece, and the protective piece is affixed to the inside of the plastic housing. . According to this method, although the cost is lower than that of the metal housing, the thickness of the plastic housing is increased, and similarly to the above, phenomena such as reflection or diffraction of electromagnetic waves and creeping cannot be removed.

3. About plating This is to make the surface of the plastic housing conductive by plating a thin layer of one or more layers of conductive metal on the surface of the plastic housing. In order to protect the environment, currently, in advanced countries such as Europe and America, the ban on the import of plated products is regulated by law.

4. Application of conductive paint to plastic housing This is to spray conductive paint onto the plastic housing. The method mainly has a problem that the conductive paint has a risk of disturbing environmental conservation, and the product quality is low and the stability is poor.

5. Vacuum Sputtering Method This is a method in which a conductive plating film or a plating film made of an electromagnetic wave absorbing particulate material is formed on the surface of the plastic housing by vacuum sputtering. Currently, it is widely used in the electromagnetic wave prevention treatment of plastic products, but a special low-temperature vacuum sputtering facility is required, and this technology is held by a few manufacturers. For this reason, in the process of manufacturing the housing of an electronic product, since another outsourcing process is required, manufacturing time becomes long and processing cost also becomes high.

6. Absorbing electromagnetic waves using electromagnetic wave absorbing fine particle material (ESD) This is a characteristic of electromagnetic wave absorbing fine particle materials, that is, using a medium that loses resonance impedance, dielectric, magnetic force, etc. By converting energy into thermal energy, the effect of removing electromagnetic waves is achieved.

  However, since this electromagnetic wave absorbing fine particle material does not have a shielding effect for preventing the transmission of electromagnetic waves, it is necessary to affix another metal piece to the back surface of the electromagnetic wave absorber. Therefore, the electromagnetic wave generated by reflection may be absorbed again by the electromagnetic wave absorber. For this reason, the electromagnetic wave absorbing fine particle material alone does not sufficiently achieve the electromagnetic wave protection effect.

  In addition, since the frequency of electromagnetic waves that can be absorbed by the electromagnetic wave absorbing fine particle material is in a certain range, the usual electromagnetic wave absorbing fine particle material cannot achieve the electromagnetic wave protection effect of all frequencies.

  As can be seen from the above explanation, the main drawbacks of the conventional electromagnetic wave protection technology are that the cost increases, the thickness of the housing of the product increases, and the simple electromagnetic wave shielding effect eliminates phenomena such as electromagnetic wave reflection, diffraction and creeping. It cannot be erased. For this reason, it was necessary to improve these problems.

  Therefore, technical problems to be solved in order to eliminate phenomena such as a rise in cost, an increase in the thickness of a housing of a product, reflection of electromagnetic waves, diffraction, and creeping arise, and the present invention solves this problem. For the purpose.

  The main object of the present invention is to provide an electromagnetic wave preventing fine particle material (also referred to as a composite electromagnetic fine particle material) that can be added to a single polymer, plastic material / resin paint, or a substrate such as spun fiber or cement powder. Therefore, an article or a surface treatment material made of the substrate of the present invention has an ability to shield and absorb interference electromagnetic waves in a wide frequency range.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 can be added to a base material, and has a property of absorbing and shielding electromagnetic waves in the base material. In the fine particle material for preventing electromagnetic waves including the conductive fine particle material, at least a part of the conductive fine particle material is a conductive fine particle material having a tubular / fibrous structure, and the conductive fine particle material is When added to the inside of the base material, the conductive fine particle materials are connected to each other to form an irregular shape, and the conductive path is increased to improve the conductivity inside the base material and absorb electromagnetic waves. There is provided a fine particle material for preventing magnetic waves characterized by having a shielding property.

  According to this configuration, since the conductive fine particle materials are connected to each other and formed in an irregular shape, the conductive path of the base material is increased and the electrical conductivity inside the base material is improved.

  Further, according to the present invention, an electromagnetic wave preventing fine particle material having an ability to shield and absorb disturbing electromagnetic waves in a wide frequency range can be obtained.

  The invention according to claim 2 is the particulate material for preventing electromagnetic waves according to claim 1, wherein the conductive material is a carbon nanotube, carbon fiber, activated carbon fiber, nanocarbon material, or other carbon-based material having conductivity. Provided is a fine particle material for preventing electromagnetic waves, which includes a combination of any one or a plurality of materials and conductive metal materials.

  According to this configuration, the conductive material is made of a carbon-based material or a conductive metal-based material such as carbon nanotube, carbon fiber, activated carbon fiber, or nano-carbon material, so that the conductivity of the conductive fine particle material is further increased. .

  According to a third aspect of the present invention, in the fine particle material for preventing electromagnetic waves according to the first aspect, the conductive fine particle material is a mixture of a tubular / fibrous conductive fine particle material and a granular conductive fine particle material. The tubular / fibrous conductive fine particle material and the granular conductive fine particle material are interconnected to form an irregular shape by sintering, and a conductive path of the conductive fine particle material is formed. The present invention provides a fine particle material for preventing electromagnetic waves, which is characterized by being increased.

  According to this configuration, since the tubular / fibrous conductive fine particle material and the granular conductive fine particle material are sintered together to form an irregular shape, the density of the conductive path of the conductive fine particle material is reduced. Will be improved.

  According to a fourth aspect of the present invention, there is provided the fine particle material for preventing electromagnetic waves according to the third aspect, wherein the granular conductive fine particle material is formed of a carbon-based material and has a spherical or non-uniform distribution of different sizes. Granular particles with irregular shape, and the carbon materials include graphite, C 60 fullerene, activated carbon, bamboo charcoal and other conductive carbon materials combined with one or more materials Provided is a fine particle material for preventing electromagnetic waves.

  According to this configuration, the granular conductive fine particle material has a spherical or irregular shape in which the distribution of different sizes is not uniform. Therefore, when this conductive fine particle material is added to the base material, the conductivity is further improved.

  The invention according to claim 5 is the particulate material for preventing electromagnetic waves according to claim 3, wherein the granular conductive fine particle material is irregular granular fine particles formed of a conductive metal material, The conductive metal material includes a combination of one or a plurality of materials of gold, silver, copper, iron, pig iron, aluminum, nickel, tin, pure silicon, and silicon iron. A particulate material is provided.

  According to this configuration, the conductive fine particle material is irregular granular fine particles formed of a conductive metal material, such as gold, silver, copper, iron, pig iron, aluminum, nickel, tin, pure silicon, and silicon. Since there is a combination of any one or a plurality of irons, the conductivity is further improved when this conductive fine particle material is added to the base material.

  According to a sixth aspect of the present invention, in the fine particle material for preventing electromagnetic waves according to the third aspect, the conductive fine particle material is formed by mixing a carbon-based material and a fine particle of a conductive metal material. Includes graphite, C 60 fullerene, activated carbon, bamboo charcoal, and other conductive carbon-based materials in combination with one or more materials, and the conductive metal material includes gold, silver, copper, iron, Provided is a fine particle material for preventing electromagnetic waves, which includes a combination of any one or more of pig iron, aluminum, nickel, tin, pure silicon, and silicon iron.

  According to this configuration, since the conductive fine particle material is formed by mixing the carbon-based material and the fine particles of the conductive metal material, the conductivity of the fine particle material for preventing electromagnetic waves is synergistically increased.

  According to a seventh aspect of the present invention, in the fine particle material for preventing electromagnetic waves according to the first aspect, the fine particle material for preventing electromagnetic waves further includes an electromagnetic wave absorbing fine particle material, and the conductive fine particle material is the electromagnetic wave absorbing fine particle material. Provided is a fine particle material for preventing electromagnetic waves, characterized in that it absorbs electromagnetic waves reflected or diffracted at a location where the electromagnetic waves are blocked, consumes the electromagnetic energy, converts it into thermal energy, and eliminates the electromagnetic wave to disappear.

  According to this configuration, since the electromagnetic wave preventing fine particle material further includes the electromagnetic wave absorbing fine particle material, the electromagnetic wave reflected or diffracted at the portion where the conductive fine particle material blocks the electromagnetic wave is absorbed.

  The invention according to claim 8 is the fine particle material for preventing electromagnetic waves according to claim 7, wherein the electromagnetic wave absorbing fine particle material includes fine particles of metal oxide, and the metal oxide includes aluminum oxide, zinc oxide, titanium dioxide, Provided is a fine particle material for preventing electromagnetic waves, which includes a combination of any one or a plurality of photocatalyst materials and iron oxides.

  According to this configuration, since the electromagnetic wave absorbing fine particle material contains at least one of metal oxides, for example, aluminum oxide, zinc oxide, titanium dioxide, photocatalyst material, and iron oxide, the reflected or diffracted electromagnetic waves are absorbed better. Is done.

  The invention according to claim 9 is the fine particle material for preventing electromagnetic waves according to claim 7, wherein the electromagnetic wave absorbing fine particle material is a magnetic powder, and the magnetic powder is a metal material or metal oxide material having magnetism. The present invention provides a fine particle material for preventing electromagnetic waves, comprising a combination of any one or a plurality of materials.

  According to this configuration, since the electromagnetic wave absorbing fine particle material includes either a magnetic metal material or a magnetic metal oxide material, not only the electromagnetic wave shielding effect but also the electromagnetic wave absorbing fine particle material Phenomena such as reflection and diffraction are eliminated and removed.

  The invention according to claim 10 is the fine particle material for preventing electromagnetic waves according to claim 7, wherein the electromagnetic wave absorbing fine particle material is a natural mineral material, and the natural mineral material is cement, porcelain stone, clay, calcium carbonate and far infrared rays. Provided is a fine particle material for preventing electromagnetic waves, characterized in that it includes a combination of any one or a plurality of radioactive ore materials.

  According to this configuration, the electromagnetic wave absorbing fine particle material includes any one of natural mineral materials such as cement, porcelain clay, clay, carbonic acid carbonate, and far-infrared radiation ore material. Phenomena such as reflection and diffraction of electromagnetic waves can be eliminated using materials.

  An eleventh aspect of the present invention is the fine particle material for preventing electromagnetic waves according to the first aspect, wherein the base material is a polymer base material, the polymer base material includes plastic / rubber, and plastic molding The polymer base material is processed into plastic / rubber products of various shapes or forms by a processing method, and the plastic molding processing method includes an injection molding processing method, and an electromagnetic wave preventing fine particle material is provided. .

  According to this configuration, the base material includes a polymer base material, for example, plastic / rubber, and is processed by a plastic molding method (such as an injection molding method). Accordingly, various shapes or forms of plastic / rubber products are easily processed.

  According to a twelfth aspect of the present invention, there is provided the fine particle material for preventing electromagnetic waves according to the eleventh aspect, wherein the electromagnetic fine particle material is doped into the polymer substrate during the polymerization reaction of the polymer substrate. Provided is a fine particle material for preventing electromagnetic waves.

  According to this configuration, since the electromagnetic fine particle material is doped and mixed in the polymer base material in the course of the polymerization reaction of the polymer base material, the electromagnetic fine particle material and the polymer base material are entangled and connected to each other. Is done.

  According to a thirteenth aspect of the present invention, in the fine particle material for preventing electromagnetic waves according to the eleventh aspect, the polymer base material is first crushed and processed into a powder form. An electromagnetic wave characterized in that a material is doped into the polymer base material, the polymer base material is further processed into a plastic product by a plastic molding method, and the plastic molding method includes an injection molding method. A particulate material for prevention is provided.

  According to this configuration, after the polymer base material is first crushed and processed into a powder form, the polymer base material is doped with the fine particle material for preventing electromagnetic waves. Then, the polymer substrate is processed into a plastic product by a plastic molding method. Therefore, the connection between the polymer base material of the plastic product and the electromagnetic fine particle material becomes high.

  According to a fourteenth aspect of the present invention, there is provided the fine particle material for preventing electromagnetic waves according to the eleventh aspect, wherein the fine particle material for preventing electromagnetic waves is in a state in which the polymer base material becomes a powder after completing the polymerization reaction. The polymer base powder is doped and mixed, the polymer base powder is processed into granules, and the subsequent plastic molding process is facilitated. The plastic molding method is injection molding Provided is a fine particle material for preventing electromagnetic waves characterized by including a processing method.

  According to this configuration, the powder of the polymer base material is processed into a granule after the fine particle material for preventing electromagnetic waves is doped and mixed in the powder of the polymer base material. Thus, the granular polymeric substrate facilitates subsequent plastic molding processes.

  According to a fifteenth aspect of the present invention, in the fine particle material for preventing electromagnetic waves according to the eleventh aspect, the fine particle material for preventing electromagnetic waves exceeding a predetermined dope concentration and the polymer base material are mixed to obtain a high concentration. A mother granule is prepared, and the high-concentration mother granule and an undoped fine particle material polymer base granule for preventing electromagnetic waves are mixed and processed into a plastic product by a plastic molding method. The molding method provides a fine particle material for preventing electromagnetic waves, which includes an injection molding method.

  According to this configuration, a high-concentration mother granule is prepared by mixing a fine particle material for preventing electromagnetic waves exceeding a predetermined dope concentration and a polymer base material. Further, a high-concentration mother granule and a polymer base granule of an undoped fine particle material for preventing electromagnetic waves are mixed. Thus, the granular polymeric substrate facilitates subsequent plastic molding processes.

  The invention according to claim 16 provides the particulate material for preventing electromagnetic waves according to claim 11, wherein the polymer base material is processed into a housing of an electronic product. To do.

  According to this configuration, the polymer base material is used after being processed into a housing for an electronic product.

  The invention according to claim 17 is the electromagnetic wave preventing fine particle material according to claim 11, wherein the polymer base material is processed into a tubular or flat electromagnetic shielding unit. Provide particulate material.

  According to this configuration, the polymer substrate is processed into a tubular or flat electromagnetic shielding unit.

  According to an eighteenth aspect of the present invention, in the fine particle material for preventing electromagnetic waves according to the first aspect, the substrate is a resin paint, and the resin paint to which the fine particle material for preventing electromagnetic waves is added is an electronic product, wood By applying or printing on the surface of cement, glass, paper, plastic, fabric or building material, or the inner or outer surface of metal / pipe material or electric wire, electromagnetic waves are applied to the article coated with the resin paint. Provided is a fine particle material for preventing electromagnetic waves, which has a function of absorbing and shielding.

  According to this configuration, a resin paint is added to a fine particle material for preventing electromagnetic waves, and this is applied to the surface of an electronic product, wood, cement, glass, paper, plastic, cloth or building material, or metal / pipe material or electric wire. Used by painting or printing on the inner or outer surface. Therefore, the product applied with the resin paint has a function of absorbing and shielding electromagnetic waves.

  The invention according to claim 19 is the fine particle material for preventing electromagnetic waves according to claim 1, wherein the base material is an artificial spun fiber material, and the fine particles for preventing electromagnetic waves are contained in the artificial spun fiber material. Disclosed is a fine particle material for preventing electromagnetic waves, characterized in that the spun fiber material is uniformly distributed and mixed, and the spun fiber material is processed into a spun fiber product or a textile product having anti-electromagnetic properties.

  According to this configuration, fine particles for preventing electromagnetic waves are uniformly mixed in an artificially spun fiber material and processed into a spun fiber product or a woven product.

  According to a twentieth aspect of the present invention, there is provided the fine particle material for preventing electromagnetic waves according to the fine particle material for preventing electromagnetic waves according to the first aspect, wherein the base material is a cement material.

  According to this structure, the base material containing electroconductive fine particles is used as a cement material.

  The invention according to claim 21 is an electromagnetic wave preventing fine particle material obtained by mixing at least one conductive fine particle material and at least one electromagnetic wave absorbing fine particle material, and the electromagnetic wave preventing fine particle material is one In the fine particle material for preventing electromagnetic wave that can be doped in the base material and has the property of blocking and absorbing the transmission of the electromagnetic wave to the base material, the conductive fine particle material makes the base material conductive. The electromagnetic wave absorbing fine particle material that is used for shielding the transmission of electromagnetic waves is used to absorb electromagnetic waves reflected or diffracted at a location where the conductive fine particle material blocks electromagnetic waves, and consumes the energy of the electromagnetic waves. Thus, the present invention provides an electromagnetic wave-preventing fine particle material, which is converted to thermal energy to eliminate and remove the electromagnetic wave.

  According to this configuration, the conductive fine particle material is used for imparting conductivity to the base material. The electromagnetic wave absorbing fine particle material that shields the transmission of electromagnetic waves is used to absorb electromagnetic waves reflected or diffracted by the conductive fine particle material where electromagnetic waves are blocked. Convert.

  The invention according to claim 22 is the fine particle material for preventing electromagnetic waves according to claim 21, wherein the conductive fine particle material is a carbon-based material, and the carbon-based material is graphite, C60 fullerene, activated carbon, bamboo charcoal, and others. Provided is a fine particle material for preventing electromagnetic waves, comprising a combination of any one or a plurality of conductive carbon-based materials.

  According to this configuration, the conductive fine particle material is composed of graphite, C 60 fullerene, activated carbon, bamboo charcoal, and other conductive carbon-based materials. Therefore, the conductivity of the conductive fine particle material is further increased.

  According to a twenty-third aspect of the present invention, in the fine particle material for preventing electromagnetic waves according to the twenty-first aspect, the conductive fine particle material includes a conductive metal material, and the conductive metal material includes gold, silver, copper, iron, Provided is a fine particle material for preventing electromagnetic waves, which includes a combination of any one or more of pig iron, aluminum, nickel, tin, pure silicon, and silicon iron.

  According to this configuration, the conductive fine particle material is formed by combining one or more conductive metal materials of gold, silver, copper, iron, pig iron, aluminum, nickel, tin, pure silicon, and silicon iron. The Therefore, the conductivity of the conductive fine particle material is further increased.

  According to a twenty-fourth aspect of the present invention, in the fine particle material for preventing electromagnetic waves according to the twenty-first aspect, the electromagnetic wave absorbing fine particle material includes a metal oxide material, and the metal oxide material includes aluminum oxide, zinc oxide, and titanium dioxide. The present invention provides a fine particle material for preventing electromagnetic waves, comprising a combination of any one or a plurality of materials of a photocatalytic material and an iron oxide.

  According to this configuration, the electromagnetic wave absorbing fine particle material is formed by combining any one or more metal oxide materials of aluminum oxide, zinc oxide, titanium dioxide, photocatalyst material, and iron oxide. Therefore, the conductivity of the conductive fine particle material is further increased.

  According to a twenty-fifth aspect of the present invention, in the fine particle material for preventing electromagnetic waves according to the twenty-first aspect, the electromagnetic wave absorbing fine particle material includes a magnetic powder material, and the magnetic powder material is a metal material or metal oxide having magnetism. Provided is a fine particle material for preventing electromagnetic waves, comprising a combination of any one or a plurality of materials.

  According to this configuration, the electromagnetic wave absorbing fine particle material is formed by combining one or a plurality of magnetic powder materials of a metal material having magnetism or a metal oxide material having magnetism. Therefore, not only the electromagnetic wave shielding effect, but also the electromagnetic wave absorption fine particle material eliminates and eliminates the phenomenon of electromagnetic wave reflection and diffraction.

  The invention according to claim 26 is the fine particle material for preventing electromagnetic waves according to claim 21, wherein the electromagnetic wave absorbing fine particle material includes a natural mineral material, and the natural mineral material is cement, porcelain stone, clay, calcium carbonate and distant material. Provided is a fine particle material for preventing electromagnetic waves, comprising a combination of any one or a plurality of infrared radiation ore materials.

  According to this configuration, the electromagnetic wave absorbing fine particle material is formed by combining any one or a plurality of natural mineral materials of cement, porcelain clay, clay, calcium carbonate, and far infrared radiation ore material. Therefore, not only the electromagnetic wave shielding effect, but also the electromagnetic wave absorption fine particle material eliminates and eliminates the phenomenon of electromagnetic wave reflection and diffraction.

  According to the first aspect of the present invention, the conductivity inside the base material is improved and the property of absorbing and shielding electromagnetic waves is obtained, so that a polymer, a plastic material / resin paint, or a spun fiber, cement powder is obtained. It is possible to provide a particulate material for preventing electromagnetic waves that can be added to a substrate such as the above at a low cost.

  Further, according to the present invention, an electromagnetic wave preventing fine particle material capable of shielding and absorbing electromagnetic wave interference in a wide frequency range can be obtained.

  In the invention described in claim 2, since the fine particle material for preventing electromagnetic waves has high conductivity, in addition to the effect of the invention described in claim 1, the ability to shield and absorb electromagnetic interference in a wide frequency range is improved. .

  In the invention described in claim 3, since the conductive path of the conductive fine particle material is further increased, in addition to the effect of the invention described in claim 1, the fine particle material for preventing electromagnetic waves of the present invention is capable of emitting electromagnetic waves in a wide frequency range. The ability to absorb, shield and remove can be further improved.

  In the invention described in claim 4, when the conductive fine particle material is added to the base material, the conductivity is further improved. Therefore, in addition to the effect of the invention described in claim 3, Electromagnetic waves generated from the inside can be led out to the outside. Therefore, the electromagnetic wave can be guided to the ground through the ground device. In short, finally, the electromagnetic wave can be reduced, and the shielding effect of the electromagnetic wave can be remarkably improved.

  In the fifth aspect of the invention, when the conductive fine particle material is added to the base material, the conductivity is further improved. Therefore, similarly to the effect of the fourth aspect of the invention, the electromagnetic wave is guided to the ground through the ground device. The electromagnetic wave shielding effect can be improved.

  According to the sixth aspect of the invention, since the conductivity of the fine particle material for preventing electromagnetic waves is synergistically improved, the electromagnetic wave shielding effect can be further improved in addition to the effect of the third aspect of the invention.

  Since the invention according to claim 7 can absorb the electromagnetic wave reflected or diffracted at the location where the electromagnetic wave is blocked, in addition to the effect of the invention according to claim 1, the energy of the electromagnetic wave can be consumed and converted into thermal energy. Therefore, the electromagnetic wave can be eliminated and removed more satisfactorily.

  Since the invention according to claim 8 can absorb reflected or diffracted electromagnetic waves better, in addition to the effect of the invention according to claim 7, the effect of eliminating the disappearance of electromagnetic waves can be further improved.

  The invention described in claim 9 can eliminate not only the electromagnetic wave shielding effect but also the reflection and diffraction phenomenon of the electromagnetic wave by using the electromagnetic wave absorbing fine particle material. In addition to the effect of the invention of claim 7, the electromagnetic wave The protective effect can be fully demonstrated.

  Since the invention described in claim 10 can eliminate not only the electromagnetic wave shielding effect but also the electromagnetic wave absorption fine particle material, the electromagnetic wave reflection, diffraction phenomenon and the like can be eliminated. In addition to the effect of the invention described in item 7, the electromagnetic wave protection effect can be sufficiently exhibited.

  Since the invention according to claim 11 can process plastic / rubber products of various shapes or forms by the plastic molding method, the plastic / rubber having a high electromagnetic wave protection effect in addition to the effect of the invention of claim 1 Products can be mass-produced at low cost.

  In the invention described in claim 12, since the electromagnetic fine particle material and the polymer base material can be entangled and connected to each other, in addition to the effect of the invention of claim 11, the conductivity of the polymer base material can be further improved. it can.

  In the invention described in claim 13, since the connection between the polymer base material of the plastic product and the electromagnetic fine particle material becomes high, in addition to the effect of the invention of claim 11, only the conductivity of the polymer base material increases. In other words, a plastic product having a high electromagnetic wave shielding function can be obtained.

  In the invention described in claim 14, since the powder of the polymer base material is processed into granules, in addition to the effect of the invention described in claim 11, the subsequent plastic molding process proceeds smoothly.

  In the invention described in claim 15, since the high concentration mother granule and the polymer base granule of the undoped fine particle material for preventing electromagnetic waves are mixed, in addition to the effect of the invention described in claim 11, Progress of plastic molding process becomes smoother.

  In the invention described in claim 16, since the polymer substrate is processed into a housing for electronic products, in addition to the effect of the invention described in claim 11, a housing for electronic products capable of absorbing electromagnetic waves satisfactorily is obtained.

  In the invention described in claim 17, since the polymer substrate is processed into a tubular or flat electromagnetic shielding unit, in addition to the effect of the invention described in claim 11, an electromagnetic shielding unit capable of absorbing electromagnetic waves satisfactorily is obtained. .

  Since the invention according to claim 18 can be used by adding a resin paint to the fine particle material for preventing electromagnetic waves and painting or printing on the surface of the product, it absorbs electromagnetic waves in addition to the effect of the invention according to claim 1. And products that can be shielded, ie electronic products, wood, cement, glass, papers, plastics, fabrics or building materials, metals / tubes and wires.

  Since the invention according to claim 19 can be processed into a spun fiber product or a woven product by uniformly mixing fine particles for preventing electromagnetic waves into the artificial spun fiber material, in addition to the effect of the invention according to claim 1, high A spun fiber product or a woven product having electromagnetic wave prevention characteristics is obtained.

  In the invention described in claim 20, since the base material containing conductive fine particles can be used as a cement material, in addition to the effect of the invention described in claim 1, a cement product having electromagnetic wave prevention characteristics can be obtained.

  According to the twenty-first aspect of the present invention, since the electromagnetic wave energy can be consumed and converted to thermal energy, the electromagnetic wave can be eliminated and removed.

  In the twenty-second aspect of the invention, since the conductive fine particle material has high conductivity, in addition to the effect of the twenty-first aspect of the invention, the ability to block and absorb and remove electromagnetic waves in a wide frequency range is improved.

  According to the twenty-third aspect of the present invention, since the conductive fine particle material has high conductivity, in addition to the effect of the twenty-first aspect of the invention, the ability to block and absorb and remove electromagnetic waves in a wide frequency range is improved.

  According to the twenty-fourth aspect of the invention, since the conductive fine particle material has high conductivity, in addition to the effect of the twenty-first aspect of the invention, the ability to block and absorb and remove electromagnetic waves in a wide frequency range is improved.

  The invention according to claim 25 not only provides a high electromagnetic wave shielding effect, but also can eliminate and eliminate the reflection and diffraction of electromagnetic waves. Therefore, in addition to the effect of the invention according to claim 21, it sufficiently exhibits a high electromagnetic wave protection effect. can do.

  The invention described in claim 26 not only provides a high electromagnetic wave shielding effect, but also eliminates the reflection and diffraction of electromagnetic waves, so that in addition to the effect of the invention described in claim 21, it sufficiently exhibits a high electromagnetic wave protection effect. can do.

  The present invention is an electromagnetic wave-preventing fine particle material that can be added to a base material such as a polymer, plastic material / resin paint, spun fiber, cement powder, etc., and can effectively shield and absorb electromagnetic waves in a wide frequency range. In order to achieve the object of providing a particulate material for prevention at a low cost, the particulate material for preventing electromagnetic waves comprises at least one conductive particulate material, and the conductive particulate material is a tubular / fibrous structural conductive material. The conductive fine particles or the granular conductive fine particles mixed with the conductive fine particles having the structure can be doped with a part of the electromagnetic wave absorbing fine particle material in the fine particle material for preventing electromagnetic waves, thereby This was achieved by increasing the ability to absorb and eliminate the odor.

  In order to achieve the above and other objects, the present invention will be described in detail as follows, with reference to preferred technical means employed in the bag and preferred embodiments thereof. However, the scope in which the present invention can be implemented is not limited to this.

  As shown in FIG. 1, the fine particle material for preventing electromagnetic waves of the present invention can be doped into a substrate such as one plastic rubber, resin paint, cement powder or artificially spun fiber, and absorbs a wide band of electromagnetic waves. And a fine particle material that can be shielded, and the base material to which the material is added has electromagnetic wave prevention characteristics, and the base material is used to produce a housing such as a housing for electronic products, a spun fiber product, a textile product, or a paint. it can.

  The fine particle material for preventing electromagnetic waves of the present invention comprises at least one kind of conductive fine particle material or a combination of two or more kinds of conductive fine particle material, and the conductive fine particle material has a tubular / fibrous structure. (Long structure) or an irregular granular structure, but may be a mixture of a tubular / fibrous structure and an irregular granular structure.

  The main effect of the conductive fine particle material is that it is used to increase the conductivity of the base material and to form a conductive path densely woven inside the base material. Provides the ability to absorb and shield electromagnetic interference in the frequency range.

  Further, in order to eliminate the electromagnetic wave phenomenon such as diffraction, refraction, creeping, etc. caused by the conductive fine particle material blocking the electromagnetic wave by going one step further, the electromagnetic wave absorbing fine particle material is further added to the electromagnetic wave preventing fine particle material. Can be added.

  Examples of the material of the electromagnetic wave absorbing fine particle material mainly include metal oxides, photocatalytic materials, magnetic powders, and materials such as calcium carbonate, cement, natural ore, and far-infrared radiation ore.

  Its main function is to absorb the reflected electromagnetic waves and diffracted electromagnetic waves generated by being blocked by the conductive material, and consumes the energy of the electromagnetic waves and converts it to thermal energy, thereby eliminating and removing the reflection and diffraction of the electromagnetic waves. It is.

  A first embodiment of the present invention is shown in FIG. As shown in the figure, the electromagnetic wave preventing fine particle material of the present embodiment is composed of at least one conductive fine particle material 10 having a tubular / fibrous structure.

  Since the conductive fine particle material 10 having the structure has a special structure, when added to the base material 30, both the head and the tail are easily connected to each other, and the interwoven mesh structure is formed. It is formed.

  Thus, since the conductive fine particle material 10 has the structure described above, the conductive fine particle material 10 is connected to each other, increases the conductive path inside the base material 30 to improve the conductivity, and in addition, a net-like conductive material that can shield electromagnetic waves. Generate a net. For this reason, the base material 30 is provided with electromagnetic wave blocking characteristics and electromagnetic wave shielding characteristics.

As the conductive fine particle material having the above structure, the following can be mainly used.
1. Regarding carbon-based materials; for example, carbon nanotubes, carbon fiber materials, fibrous nanocarbon materials, and other conductive carbon-based materials.
2. Regarding the conductive metal-based material: The conductive metal is manufactured into an extremely thin fiber, and is further processed into a fine particle material that can be doped into the base material through a miniaturization process.

  In the first embodiment of the present invention, the conductive fine particle material 10 having a tubular / fibrous structure can be interconnected and knitted into an irregular network structure as compared with the prior art. In the meantime, electrical conduction characteristics are generated and enhanced.

  Moreover, the conductivity of the base material is higher than that of a conventional simple powder granular conductive additive material due to the enhanced conductivity. In addition, since a net-like conductive network composed of close conductive paths is formed in the base material 30, a function of effectively shielding / protecting electromagnetic interference is ensured.

  A second embodiment of the present invention is shown in FIG. As shown in the figure, the present embodiment is an embodiment in which a conductive fine particle material 10 having a tubular / fibrous structure and a conductive fine particle material 10B having a granular structure are mixed with each other.

  In particular, the conductive fine particle material 10B having a granular structure is manufactured in a granular shape by using irregular-shaped conductive materials having different diameters, and mixed with the conductive fine particle material 10 having a tubular / fibrous structure. The substrate 30 is doped.

  In the present embodiment, the conductive fine particle material 10 having a tubular / fibrous structure can be connected to the conductive fine particle material 10B having a granular structure by cross-weaving each other. Function is secured.

  Materials that can be selected as the conductive fine particle materials 10 and 10B according to the present invention are classified as follows.

  1. Regarding carbon-based materials; this is mainly carbon-based materials such as graphite, C60 fullerene, activated carbon, bamboo charcoal, carbon nanotubes, carbon fibers or nanocarbon materials.

  These carbon-based materials are given conductivity after undergoing a high temperature reaction. Then, by polishing the carbon-based material and processing it into ultrafine particles, a particulate material having a conductive / tubular / fibrous (including linear or rod-like) structure or a granular structure can be obtained.

  2. Regarding conductive metal-based materials; this is a fine particle material made of a conductive metal such as gold, silver, copper, aluminum, iron, pig iron, nickel, tin, pure silicon, or silica.

  As described above, the present invention is a technique in which conductive fine particles having a tubular / fibrous structure and conductive fine particles having an irregular granular structure are mixed with each other, and the effect thereof is shown in FIGS. 8 and 9. This can be found by comparing the enlarged views of the two electron microscopes.

  FIG. 8 is a graph showing a structure in which carbon nanotube columnar structures, nano-level scrap-like or spherical structures, and irregular granular carbon-based fine particles are mixed into a plastic substrate using the technical means of the present invention. It is an enlarged view of the electron microscope of the structure | tissue structure formed in this way. As is apparent from the figure, there is an irregular composition structure formed of conductive fine particles of a carbon-based material having a tubular / fibrous structure and conductive fine particles of a granular carbon-based material. In addition, a fine conductive path and an electromagnetic wave shielding net are formed in the plastic substrate. For this reason, the effect of blocking and shielding electromagnetic waves is remarkably exhibited. In the figure, reference numeral 81 indicates nanocarbon, reference numeral 82 indicates a nanocarbon material, and reference numeral 83 indicates a carbon nanotube.

  FIG. 9 is an enlarged view of an electron microscope having a tissue structure in which conductive particles having a granular structure are simply doped on a plastic substrate. As is clear from the figure, the conductive path of the granular structure is relatively short (not fine), and the constructed electromagnetic shielding area range is also relatively small. For this reason, it is difficult to obtain the effect of blocking and shielding electromagnetic waves as compared with the first and second embodiments of the present invention.

  The conductive fine particle materials 10 and 10B have an effect of shielding the electromagnetic wave by increasing the conductivity of the base material 30 and blocking the transmission of the electromagnetic wave. However, since the electromagnetic wave has phenomena such as reflection, diffraction, and creeping on the conductor, the electromagnetic wave cannot be effectively eliminated and removed even when shielded by the conductive fine particle materials 10 and 10B.

  Therefore, as in the third embodiment of the present invention shown in FIG. 3, the electromagnetic wave absorbing fine particle material 20 is further added to the fine particle material for preventing electromagnetic waves, thereby reflecting or diffracting by the conductive fine particle materials 10 and 10B. The electromagnetic wave energy to be converted is converted into thermal energy, so that the electromagnetic wave is absorbed and the disappearance removal effect is exhibited.

  The electromagnetic wave absorbing fine particle material 20 has a high degree of electromagnetic wave reflection loss rate, and causes phenomena such as impedance, magnetism, resonance, deelectric current loss (electromagnetic wave reflection loss), etc. It functions to convert electromagnetic energy into thermal energy. Materials that can be selected as the electromagnetic wave absorbing fine particle material 20 are mainly classified as follows.

  1． About metal oxide powders; This mainly includes metal oxide powders such as aluminum oxide, zinc oxide, copper oxide, titanium dioxide, photocatalyst materials or iron oxides, for example, triiron tetroxide Since it has the characteristics of high impedance or high deelectric current coefficient (coefficient of electromagnetic wave reflection loss) and causes impedance loss or deelectric current loss of electromagnetic wave, electromagnetic wave energy can be lost.

  2． About magnetic powder; This is mainly metal powder with magnetism (for example: neodymium, boron-based alloy, etc.) and metal oxide with magnetism (for example: magnetic iron oxide), and they are magnetic loss to electromagnetic waves. Resonance loss is caused, and electromagnetic energy can be consumed.

   3． For natural ores; this is cement powder, ceramics, clay, calcium carbonate, or natural ores containing silicon, iron, aluminum, nickel, carbon, magnesium, manganese, chromium minerals, etc., and far-infrared emitting natural ores For example, electric stone, porphyry-rock, quartz, quartz, mica and the like. Powders made of these materials have high impedance and high deelectric current characteristics. Therefore, when this is added to the fine particle powder for preventing electromagnetic waves of the present invention, it can greatly contribute to the improvement of the electromagnetic wave absorption effect.

  As in the fourth embodiment shown in FIG. 4, the present invention can be put into practical use by mixing the granular conductive fine particle material 10 </ b> B with the electromagnetic wave absorbing fine particles 20. In this embodiment, the fibrous or tubular conductive fine particle material used in the above embodiment is not included, but a relatively common use is obtained by mixing the conductive fine particle material and the deelectric current fine particle material. A relatively preferable effect can be achieved as compared with the electromagnetic wave preventing fine material having conductivity or deelectric current property.

As can be seen from the above description, the diameters of the powder granules of the conductive material and the electromagnetic wave absorbing fine particle material both differ depending on the wavelength range of the electromagnetic wave with respect to the function of shielding and absorbing the electromagnetic wave. Therefore, in the present invention, the conductive fine particle material 10B having a granular structure with different diameters and the electromagnetic wave absorbing fine particle material 20 are mixed and used. Thus, an effect of effectively blocking and absorbing electromagnetic waves having different wavelengths can be obtained.

  Further, in order to immediately respond to protection of electromagnetic waves having an extremely short wavelength, the conductive fine particle material 10B and the electromagnetic wave absorbing fine particle material 20 having a granular structure are subjected to atomization processing, and at least a part of the powder diameter is 1 to 100 nanometers. The range is set so that nanometer-scale powder granule morphology is obtained.

  The fine particle material for preventing electromagnetic waves of the present invention can be added to the substrate 30 in a plurality of forms, and the addition of the fine particle material gives the substrate 30 the ability to absorb and eliminate electromagnetic waves in a wide frequency range. . As the base material 30, a polymer base material such as plastic / rubber, resin paint, spun fiber material, cement, or the like can be adopted.

  When the base material 30 is a polymer base material (for example: PC, PE, POLYESTER, PP, PVC, ABS, PET, PT, PU, nylon, acrylic resin, rubber, sponge, silica gel, etc.) In addition, it can be manufactured directly into a housing of an electronic product or a unit such as a shielding plate, a threading tube, or a wire covering material by a plastic molding method.

  For this reason, the particulate material for preventing electromagnetic waves of the present invention can be applied in a considerably wide range. As a specific application example, as shown in FIG. 5, the substrate can be used to manufacture an electronic product housing 40. Further, the produced housing 40 has an effect of shielding and absorbing electromagnetic waves. Therefore, the housing 40 is used for shielding and absorbing electromagnetic waves generated in the circuit unit 41.

  As shown in FIG. 6, various base plate pieces 50 may be manufactured using the base material and used as an electromagnetic wave shielding plate. Further, as shown in FIG. 7, the base material is manufactured in one protective tube 60, and a power / message line 70 is provided in the central portion of the protective tube 60. Thereby, electromagnetic interference from the outside of the power / message line 70 is prevented, or the power / message line 70 prevents the influence of electromagnetic interference from the outside, or electromagnetic waves from the power / message line 70. Leakage can be avoided.

  The substrate may be a resin paint. If the substrate is a resin paint, it can be used as a paint or pigment. Therefore, it can be applied to a wide range of products such as plastic products, fabrics, metal, wood, building wall plates, glass, plastic pipes, and various materials such as electric wires or surface treatment. Therefore, even if it is various various materials, the effect which shields and absorbs electromagnetic waves is exhibited.

  When the base material 30 is a plastic polymer material, the method of adding the fine particle material for preventing electromagnetic waves to the base material 30 is mainly as follows.

  1． The fine particle material for preventing electromagnetic waves of the present invention is added during the polymerization reaction of the polymer substrate.

  2． It should be noted that a general polymer base material is almost in a powder state after undergoing a polymerization reaction, which can be further processed into granules by a mold, and can be conditioned by a subsequent plastic injection molding method. For this reason, the present invention adds the fine particle material for electromagnetic wave prevention of the present invention to the powder of the polymer substrate when the polymer substrate has completed the polymerization reaction and is in a powder state. It can be made into a granular material using the powder of the polymer base material after mixing. Thereby, it is advantageous in terms of manufacturing when the plastic is subjected to an injection molding method or other plastic molding processing in the subsequent post-process.

  3． If the polymer substrate is in the form of plastic particles, the plastic particles are crushed and then added to the electromagnetic wave preventing fine particle material of the present invention, or the electromagnetic wave preventing fine particle material is directly used as a plastic base material. The product can be made directly by mixing and injection molding or other plastic molding process.

  Four. In the present invention, it is possible to add an amount of the fine particle material for preventing electromagnetic waves exceeding the normal dope concentration into the polymer base material, and thus, “high concentration mother particle” "To manufacture. After that, the high-concentration plastic granules are mixed into general plastic mother grains, and further, an electronic product housing or other product is produced by a general injection molding method or other plastic molding method. To do.

  For example, when the proportion of normal dope between the fine particle material for preventing electromagnetic waves of the present invention and the polymer substrate is 5 wt%, the fine particles for preventing electromagnetic waves of 5 times the concentration in some polymer substrates, that is, 25 wt%. The material can be doped. And using this, it manufactures to the said "high concentration mother grain".

  Thereafter, the “high concentration mother granule” is further mixed with a polymer base granule to which 4 times by weight of the fine particle material for preventing electromagnetic waves is not added. Then, a plastic product is manufactured through subsequent molding using the mixed granule. In this way, the dope concentration of the fine particle material for preventing electromagnetic waves contained in the plastic product has a predetermined specific gravity of 5 wt%.

  If the polymer base material is a polymer material such as rubber or sponge, the fine particle material for preventing electromagnetic waves can be added to the rubber material being foamed during the foaming process of the rubber material.

  Further, when the base material 30 is a spun fiber, the anti-electromagnetic wave fine particle material is contained by adding the anti-electromagnetic wave fine particle material of the present invention during the polymerization reaction of the spun fiber base material. In the step of producing fiber mother particles or fiber mother particles as drawn yarns, a spun fiber having anti-electromagnetic properties is produced by adding a fine particle material for preventing electromagnetic waves.

  The substrate 30 may be cement. When the fine particle material for preventing electromagnetic waves of the present invention is mixed in the base material 30 in the cement form (product), the base material of the cement product can have an electromagnetic wave preventing property. For this reason, when the base material 30 of the said cement form is utilized and the material for the partition of a wall or a building is manufactured, an electromagnetic wave prevention characteristic can be given to a building structure.

  According to the present invention, by adding the fine particle material for preventing electromagnetic waves into the base material in various forms, the base material can have a characteristic capable of absorbing and eliminating elimination of the disturbing electromagnetic wave over a wide frequency range. Compared with the prior art, the conductivity can be increased by employing a conductive fine particle material having a special structure. Moreover, since the conductive fine particle material and the electromagnetic wave absorbing fine particle material can be mixed, phenomena such as electromagnetic wave reflection, diffraction, and creeping can be completely eliminated. For this reason, it is possible to achieve the purpose of effectively and completely absorbing and preventing electromagnetic interference in a wide frequency range.

  Further, according to the present invention, it is possible to directly manufacture a housing of an electronic product or other electromagnetic wave protection unit using the base material 30, and it is not necessary to attach another electromagnetic wave protection unit. In addition, since the material processing procedure according to the present invention is completely the same as the traditional existing plastic material processing procedure, the production cost of the housing of the electronic product can be effectively reduced.

  Furthermore, the technology of the present invention makes it possible to produce various paints, which can be widely used as electromagnetic wave protection means for various products. Therefore, the application aspect of the present invention can be widely applied to electromagnetic wave protection of various daily life products. It reaches to.

  As described above, according to the present invention, the fine particle material for preventing electromagnetic waves can be added to at least one base material, and includes conductive fine particle materials that can absorb and shield electromagnetic waves. At least a part of the conductive fine particle material is composed of tubular / fibrous conductive fine particle material. The conductive fine particles are mixed in the base material (inside the base material) and bonded together by sintering. Generate an irregular organizational structure. Thus, the tubular / fibrous conductive particulate material promotes electrical conductivity and significantly improves the ability to shield and absorb interfering electromagnetic waves over a wide frequency range.

  The tubular / fibrous conductive fine particle material may be one or more of carbon nanotubes, activated carbon fibers, carbon fibers, nanocarbon materials and other conductive carbon-based materials, or conductive metal materials. Is a combination. Unless otherwise specified, “one” referred to in the present invention means that any one of a plurality is arbitrarily selected.

  According to a specific embodiment of the present invention, the conductive fine particle material may be obtained by mixing tubular / fibrous conductive fine particles with granular conductive fine particles. Alternatively, the tubular / fibrous conductive fine particle material and the irregular shaped granular conductive fine particle material may be mixed and spun together. In this case, the electrical characteristics of the conductive fine particle material are further generated / To increase. Therefore, since the density of the conductive path of the conductive fine particle material is increased, the fine particle material for preventing electromagnetic waves naturally increases the ability to absorb, shield and remove electromagnetic waves in a wider frequency range.

  According to the embodiment, the granular conductive fine particle material may be spherical or irregular granular fine particles having a different size distribution manufactured from a carbon-based material. The carbon-based material is configured by combining any one or more of graphite, bamboo charcoal, carbon black, C60 fullerene, activated carbon, nano-carbon material (nano-carbon ball) or other conductive carbon-based material.

  On the other hand, the conductive fine particle material is produced by combining any one or a plurality of conductive metal materials such as gold, silver, copper, aluminum, iron, pig iron, nickel and tin, pure silicon and silicon iron. . The conductive fine particle material can be formed by mixing a conductive carbon-based fine particle material and a conductive metal-based fine particle material.

  The main effect of the conductive fine particle material is that an electromagnetic wave preventive electromagnetic wave particle material is added to the base material to impart conductivity, and thus, an electromagnetic wave, for example, an electromagnetic wave incident from the outside or an internal unit is generated. Electromagnetic waves can be derived. The object of shielding electromagnetic waves can be achieved by deriving electromagnetic waves to the ground through one earthing device and finally reducing the electromagnetic waves.

  The fine particle material for preventing electromagnetic waves of the present invention may have a structure in which conductive fine particles and electromagnetic wave absorbing fine particle materials are alternately mixed and composed. Materials that can be selected as the electromagnetic wave absorbing fine particle material are mainly materials such as metal oxides, photocatalytic materials, magnetic powders, calcium carbonate, cement, natural ores, and far-infrared emitting ore materials.

  One of the main functions of the fine particle material for preventing electromagnetic waves is to absorb electromagnetic waves generated by reflection or diffraction at a location blocked by the conductive material, and to consume the electromagnetic waves to generate thermal energy. This is a function to convert, and by this, phenomena such as reflection and diffraction of electromagnetic waves can be effectively erased or removed.

  In particular, the metal oxide is a combination of one or more of aluminum oxide, zinc oxide, titanium dioxide, photocatalytic material, and iron oxide. The magnetic powder is a metal material having magnetism or a metal oxide material having magnetism. Furthermore, the natural mineral material is a combination of any one or a plurality of natural mineral materials such as cement, porcelain clay, clay, calcium carbonate and other metal ores.

  The fine particle material for preventing electromagnetic waves can be constituted by mixing conductive fine particles and an electromagnetic wave absorbing fine particle material. According to this configuration, not only the electromagnetic wave shielding effect but also the properties of the electromagnetic wave absorbing fine particle material can be used to increase the disappearance removal effect of phenomena such as reflection and diffraction of electromagnetic waves, and to exhibit a sufficient electromagnetic wave protection effect. .

  According to the fine particle material for preventing electromagnetic waves of the present invention, a polymer substrate can be adopted as the substrate. The polymer substrate is specifically plastic / rubber, and the polymer substrate can be produced into plastic products / rubber products of various shapes or forms by a plastic molding method. An injection molding method can be adopted as a plastic molding method.

  The fine particle material for preventing electromagnetic waves can be doped into the polymer substrate during the polymerization reaction of the polymer substrate. Further, the fine particle material for preventing electromagnetic waves can be mixed by doping into the powder of the polymer substrate in the raw material powder state after the polymerization reaction of the polymer substrate is completed. And the subsequent plastic processing can be smoothly advanced by manufacturing the powder of a polymer base material to a granule. In this case, an injection molding method can be adopted as the plastic molding method.

  According to another embodiment, the polymer base material is pulverized into a powder form, a fine particle material for preventing electromagnetic waves is doped into the polymer base material, and the polymer base material is further processed into a plastic molding method. To plastic products. In this case, an injection molding method can be adopted as the plastic molding method.

  According to still another embodiment, a high-concentration mother particle is prepared by mixing an electromagnetic wave preventing fine particle material exceeding a normal dope concentration (predetermined optimum predetermined concentration) and a polymer substrate. . Next, the high-concentration mother granule is mixed with granules of a polymer material that is not doped with a fine particle material for preventing electromagnetic waves, and adjusted so that the polymer base material after mixing has a normal dope concentration. Further, a plastic molded product is produced according to the plastic molding method. Also in this case, an injection molding method can be adopted as the plastic molding method.

  For example, when the normal dope ratio between the fine particle material for preventing electromagnetic waves of the present invention and the polymer substrate is 5 wt%, the dope concentration is 5 times into a part of the polymer substrate, that is, 25 wt% of electromagnetic wave prevention. The above-mentioned “high-concentration mother grain” is produced by doping the fine particle material for use. Thereafter, the “high-concentration mother granule” is mixed with the 4 × weight polymer base granule to which no fine particle material for preventing electromagnetic waves is added.

  Then, the mixed granule material is used to process into a plastic product through a subsequent plastic molding process. Thereby, the dope concentration of the fine particle material for preventing electromagnetic waves contained in the plastic product has a specific gravity of 5 wt% set in advance.

  Further, according to the embodiment of the present invention, a housing for electronic products (including an electronic component) or a tubular or flat electromagnetic shielding unit can be manufactured using a base material.

  Furthermore, the base material according to the present invention may be a resin paint. The resin paint can be coated or printed on electronic products, wood, cement, glass, paper, plastics, fabrics, building material surfaces, metal / pipe material inner surfaces or outer article surfaces. Thus, the electromagnetic wave absorbing function and the electromagnetic wave shielding function are imparted to the article coated with the resin paint.

  The substrate can be used as a material for artificially spun fibers. In this case, the artificially spun fiber material is mixed so that the fine particle material for preventing electromagnetic waves is uniformly distributed. Using the artificially spun fiber material, a spun fiber product or a textile product with an electromagnetic wave absorbing function is produced. The substrate can be used as a cement material (powder). In this case, a cement structure with an electromagnetic wave absorption function is produced using the cement material.

  The present invention provides another particulate material for preventing electromagnetic waves. That is, the electromagnetic wave preventing fine particle material is a mixture of at least one conductive fine particle material and at least one electromagnetic wave absorbing fine particle material, and the mixture is doped into one base material. Thus, the base material can be provided with the property of shielding the transmission of electromagnetic waves and absorbing the electromagnetic waves. In particular, the conductive fine particle material is used for imparting conductivity to the base material, and thus can prevent transmission of electromagnetic waves.

  Further, the electromagnetic wave absorbing fine particle material absorbs electromagnetic waves generated by reflection or diffraction at a location blocked by the conductive material powder, and consumes the electromagnetic wave energy to convert it into thermal energy. The purpose of eliminating and removing electromagnetic waves is achieved.

  Furthermore, as the conductive fine particle material, a combination of one or a plurality of materials in the carbon-based material or a combination of one or a plurality of materials in the conductive metal material is adopted.

  Furthermore, the electromagnetic wave absorbing fine particle material may be a combination of one or more materials in the metal oxide, a combination of one or more materials in the magnetic powder, or the natural mineral material. A combination of one or a plurality of materials is employed. By adding the fine particle material for preventing electromagnetic waves of the present invention to the base material, it is possible to obtain electromagnetic wave shielding materials of different forms that can shield and absorb the transmission of electromagnetic waves.

  The fine particle material for preventing electromagnetic waves of the present invention is added to a plastic material or rubber material, and the electronic material is produced by an injection molding method or other plastic molding method using the plastic material or rubber material. In this case, it is not necessary to add another electromagnetic wave protection unit.

  In addition, the present invention can manufacture an electronic product housing that has a good electromagnetic wave shielding function and can absorb electromagnetic waves of a wide band or a specific frequency through existing processing techniques. In addition, other electromagnetic wave protection units can be manufactured using the composite functional fine particle material of the present invention.

  In addition, it is also possible to manufacture the EMI characteristic prevention resin coating using the technique of the present invention. The resin coating according to the present invention can be applied to the inner or outer surface of electronic products, wood, cement, glass, plastic, fabric, building material surfaces, papers, or pipes. Thus, any article coated with the resin paint has a characteristic capable of shielding and absorbing electromagnetic waves over a wide frequency range.

  Furthermore, the resin paint can be sprayed or sprayed on the surface of a spun fiber product or a woven product, or can be directly added to the spun fiber product or the woven product. Thus, the spun fiber product or woven product has the property of shielding and absorbing electromagnetic waves over a wide frequency range.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

Explanatory drawing of the cross-section of the base material which added the particulate material for electromagnetic wave prevention of the 1st Example by this invention. Explanatory drawing of the cross-section of the base material which added the particulate material for electromagnetic wave prevention of the 2nd Example by this invention. Explanatory drawing of the cross-section of the base material which added the particulate material for electromagnetic wave prevention of the 3rd Example by this invention. Explanatory drawing of the cross-section of the base material which added the particulate material for electromagnetic wave prevention of the 4th Example by this invention. Explanatory drawing of the structure of the housing of the electronic product produced using the technique of this invention. Explanatory drawing of the use condition of the electromagnetic wave shielding board unit produced using the technique of this invention. Explanatory drawing of the use condition of the electromagnetic wave protection tubular body produced using the technology of the present invention. The enlarged photograph of the electron microscope of the structure | tissue structure of the electromagnetic wave prevention material produced by adding the nanoparticle of the structure using the technique of this invention in the plastic material. An enlarged photo of an electron microscope of a tissue structure created by simply adding a granular nanoparticulate material into a plastic material.

Explanation of symbols

10 Conductive fine particle material with tubular / fibrous structure
10B Conductive fine particle material with granular structure
20 Electromagnetic wave absorbing fine particle material
30 Base material
40 housing
41 Circuit unit
50 pieces
60 Protective tube
70 Power / Message Line

Claims (26)

In a fine particle material for preventing electromagnetic waves, including a conductive fine particle material that can be added to a base material and has a property of absorbing and shielding electromagnetic waves in the base material,
At least a part of the conductive fine particle material is a conductive fine particle material having a tubular / fibrous structure, and when the conductive fine particle material is added to the inside of the substrate, the conductive fine particle material is It is connected to each other and formed into an irregular shape, and the conductive path is increased to improve the conductivity inside the base material and to absorb and shield electromagnetic waves. Particulate material.   2. The fine particle material for preventing electromagnetic waves according to claim 1, wherein the conductive fine particle material includes carbon nanotubes, carbon fibers, activated carbon fibers, nanocarbon materials, and other carbon-based materials and conductive metal-based materials having conductivity. A particulate material for preventing electromagnetic waves, comprising a combination of any one or a plurality of materials.   2. The fine particle material for electromagnetic wave prevention according to claim 1, wherein the conductive fine particle material is a mixture of a tubular / fibrous conductive fine particle material and a granular conductive fine particle material, and the tubular / fibrous material. The conductive fine particle material and the granular conductive fine particle material are connected to each other by sintering to form an irregular shape, and the conductive path of the conductive fine particle material is increased. Fine particle material for prevention.   4. The fine particle material for preventing electromagnetic waves according to claim 3, wherein the granular conductive fine particle material is formed of a carbon-based material and has a granular or irregular shape in which different size distributions are not uniform. It is a fine particle, and the carbon-based material includes a combination of one or more of graphite, C60 fullerene, activated carbon, bamboo charcoal and other conductive carbon-based materials. Particulate material.   The fine particle material for electromagnetic wave prevention according to claim 3, wherein the granular conductive fine particle material is irregular granular fine particles formed of a conductive metal material, and the conductive metal material is gold, silver A particulate material for preventing electromagnetic waves, comprising a combination of any one or more of copper, iron, pig iron, aluminum, nickel, tin, pure silicon, and silicon iron.   4. The fine particle material for electromagnetic wave prevention according to claim 3, wherein the conductive fine particle material is a mixture of a carbon-based material and fine particles of a conductive metal material, and the carbon-based material is graphite, C60 fullerene, activated carbon, bamboo charcoal. And any combination of one or more conductive carbon-based materials, wherein the conductive metal material is gold, silver, copper, iron, pig iron, aluminum, nickel, tin, pure silicon And a combination of any one or more materials of silicon iron and a fine particle material for preventing electromagnetic waves.   2. The fine particle material for preventing electromagnetic waves according to claim 1, wherein the fine particle material for preventing electromagnetic waves further includes an electromagnetic wave absorbing fine particle material, and the electromagnetic wave absorbing fine particle material is reflected at a location where the conductive fine particle material blocks electromagnetic waves. Alternatively, a fine particle material for preventing electromagnetic waves, which absorbs the diffracted electromagnetic waves, consumes the energy of the electromagnetic waves, converts the electromagnetic waves into thermal energy, and disappears and removes the electromagnetic waves.   The fine particle material for electromagnetic wave prevention according to claim 7, wherein the electromagnetic wave absorbing fine particle material includes fine particles of metal oxide, and the metal oxide is any of aluminum oxide, zinc oxide, titanium dioxide, photocatalyst material, and iron oxide. A particulate material for preventing electromagnetic waves, comprising a combination of one or a plurality of materials.   The fine particle material for preventing electromagnetic waves according to claim 7, wherein the electromagnetic wave absorbing fine particle material is a magnetic powder, and the magnetic powder is one or more of a magnetic metal material or a metal oxide material. A fine particle material for preventing electromagnetic waves, characterized in that it includes a combination of materials.   The fine particle material for electromagnetic wave prevention according to claim 7, wherein the electromagnetic wave absorbing fine particle material is a natural mineral material, and the natural mineral material is any one of cement, porcelain stone, clay, calcium carbonate, and far-infrared radiation ore material. Alternatively, a fine particle material for preventing electromagnetic waves, comprising a combination of a plurality of materials.   2. The fine particle material for preventing electromagnetic waves according to claim 1, wherein the base material is a polymer base material, the polymer base material includes plastic / rubber, and the polymer base material is obtained by a plastic molding method. A fine particle material for preventing electromagnetic waves, characterized in that a plastic / rubber product of various shapes or forms is processed, and the plastic molding method includes an injection molding method.   12. The electromagnetic wave preventing fine particle material according to claim 11, wherein the electromagnetic wave fine particle material is doped into the polymer base material during a polymerization reaction of the polymer base material. Particulate material.   12. The fine particle material for preventing electromagnetic waves according to claim 11, wherein the polymer base material is first crushed and processed into a powder form, and thereafter, the fine particle material for electromagnetic wave prevention is contained in the polymer base material. Further, the polymer base material is processed into a plastic product by a plastic molding method, and the plastic molding method includes an injection molding processing method.   The fine particle material for preventing electromagnetic waves according to claim 11, wherein the fine particle material for preventing electromagnetic waves is contained in the powder of the polymer substrate in a state where the polymer substrate completes a polymerization reaction to become a powder. The polymer base powder is processed into a granule and facilitates the subsequent plastic molding process. The plastic molding method includes an injection molding method. Fine particle material for preventing electromagnetic waves.   The fine particle material for preventing electromagnetic waves according to claim 11, wherein the fine particle material for preventing electromagnetic waves exceeding a predetermined dope concentration and the polymer base material are mixed to prepare a high concentration mother particle, The high-concentration base granule and the undoped fine particle material polymer base granule for preventing electromagnetic waves are mixed and processed into a plastic product by a plastic molding method. The plastic molding method is an injection molding method. A fine particle material for preventing electromagnetic waves characterized by inclusion.   The fine particle material for preventing electromagnetic waves according to claim 11, wherein the polymer base material is processed into a housing of an electronic product.   12. The particulate material for preventing electromagnetic waves according to claim 11, wherein the polymer base material is processed into a tubular or flat electromagnetic shielding unit.   The fine particle material for preventing electromagnetic waves according to claim 1, wherein the base material is a resin paint, and the resin paint to which the fine particle material for preventing electromagnetic waves is added is an electronic product, wood, cement, glass, paper, By coating or printing on the surface of plastics, fabrics or building materials, metal / pipe materials, or the inner or outer surface of electric wires, the article coated with the resin paint has a function of absorbing and shielding electromagnetic waves. Fine particle material for preventing electromagnetic waves.   The fine particle material for preventing electromagnetic waves according to claim 1, wherein the base material is an artificial spun fiber material, and the fine particles for preventing electromagnetic waves are uniformly distributed and mixed in the artificial spun fiber material, and An anti-electromagnetic particle material, wherein the artificial spun fiber material is processed into a spun fiber product or a textile product having anti-electromagnetic properties.   2. The particulate material for preventing electromagnetic waves according to claim 1, wherein the substrate is a cement material. An electromagnetic wave preventing fine particle material obtained by mixing at least one conductive fine particle material and at least one electromagnetic wave absorbing fine particle material, wherein the electromagnetic wave preventing fine particle material can be doped into the substrate, and In the fine particle material for preventing electromagnetic waves that gives the base material the property of blocking and absorbing the transmission of electromagnetic waves,
The conductive fine particle material is used to impart conductivity to the base material, and the electromagnetic wave absorbing fine particle material that shields transmission of electromagnetic waves is reflected or diffracted at a location where the conductive fine particle material blocks electromagnetic waves. A fine particle material for preventing electromagnetic waves, which is used for absorbing absorbed electromagnetic waves, wherein the energy of the electromagnetic waves is consumed and converted into thermal energy to eliminate and remove the electromagnetic waves.   The fine particle material for electromagnetic wave prevention according to claim 21, wherein the conductive fine particle material is a carbon-based material, and the carbon-based material is any one of graphite, C60 fullerene, activated carbon, bamboo charcoal, and other conductive carbon-based materials. A fine particle material for preventing electromagnetic waves, comprising a combination of one or a plurality of materials.   The fine particle material for electromagnetic wave prevention according to claim 21, wherein the conductive fine particle material includes a conductive metal material, and the conductive metal material is gold, silver, copper, iron, pig iron, aluminum, nickel, tin, A fine particle material for preventing electromagnetic waves, comprising a combination of any one or more of pure silicon and silicon iron.   The fine particle material for preventing electromagnetic waves according to claim 21, wherein the electromagnetic wave absorbing fine particle material includes a metal oxide material, and the metal oxide material includes aluminum oxide, zinc oxide, titanium dioxide, photocatalyst material, and iron oxide. A fine particle material for preventing electromagnetic waves, comprising a combination of any one or a plurality of materials.   The fine particle material for electromagnetic wave prevention according to claim 21, wherein the electromagnetic wave absorbing fine particle material includes a magnetic powder, and the magnetic powder is one or more of a metal material or a metal oxide material having magnetism. A fine particle material for preventing electromagnetic waves, characterized in that it includes a combination of materials. 23. The fine particle material for electromagnetic wave prevention according to claim 21, wherein the electromagnetic wave absorbing fine particle material includes a natural mineral material, and the natural mineral material is any one of cement, porcelain stone, clay, calcium carbonate, and far infrared radiation ore material. A fine particle material for preventing electromagnetic waves, comprising a combination of two or more materials.

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