KR100345804B1 - Electromagnetic Shelter Mortar - Google Patents

Abstract

The present invention is a mixture of 10 to 20% by weight of slag, 5 to 15% by weight of mica stone, 0.1 to 5% by weight of dispersant, 1 to 5% by weight of coke and 0.1 to 2% by weight of adjuvants after sufficiently stirring the mixture. The composition for electromagnetic shielding, characterized in that the composition is composed of calcium sulfate 30 to 70% by weight

Description

Electromagnetic shielding composition {Electromagnetic Shelter Mortar}

The present invention relates to a composition for shielding electromagnetic waves. In detail, the present invention relates to a composition for shielding electromagnetic waves by manufacturing various building materials using mortar or by applying them to buildings and building materials to block electromagnetic waves.

With the development of the electronics and telecommunications industry, as the use of various electric and electronic devices increases, the exposure of various kinds of electromagnetic waves increases.

Electromagnetic waves are transmitted, absorbed, and reflected as they pass through the medium. These phenomena are affected by the type and shape of the medium, and can be classified into absorbers and reflectors according to the electromagnetic properties of the medium. Each country has developed electromagnetic wave absorbers mainly for military purposes, such as radar imagery or radar disturbances. Recently, the development of products used in daily life such as plastic or glass products for preventing electromagnetic interference, gypsum board for high frequency absorption, as well as military purposes has been active.

Recently, there have been studies on the effects of various electromagnetic waves on the human body, such as ultra-low frequency induced in high-voltage transmission lines, and a turn technology.

Japanese Patent Application Laid-open No. Hei 6-209180 absorbs and shields electromagnetic waves by including carbon, ferrite, metal powder, or mixtures thereof in a plate made of gypsum board, asbestos cement board, or calcium silicate plate in the electromagnetic wave absorbing inner wall material. The technique to say is described,

Japanese Laid-Open Patent Publication No. Hei 1-148738 discloses a hydraulic material, a conductive material and a conductive material mixed with water, a conductive material and water,

Japanese Laid-Open Patent Publication No. 61-21956 describes a carbon fiber composite reinforced gypsum board and a manufacturing method thereof.

The conventional technologies have a problem in that the effect of electromagnetic shielding is recognized to some extent due to physical properties and the impurity content of the gypsum board, but it has a problem of lowering the physical properties.

The present invention is to solve the above problems, the present invention is to produce a variety of building materials using calcium sulfate, dispersant, slag, coke, mica stone or applied to buildings and building materials of the composition for electromagnetic shielding to block electromagnetic waves The purpose is to provide.

In order to achieve the above object, the present invention relates to a composition for shielding electromagnetic waves, which is composed of calcium sulfate, dispersant, slag, coke, mica stone and other auxiliaries.

The dispersant used in the above is to make the materials to be mixed well with each other, so that they can be uniformly dispersed with each other, the dispersant and anionic surface such as amine salt, quaternary ammonium salt, pyrimidinium salt, etc. Activators, such as ethylene oxide surfactants such as alkylaryl ethers, alkyl ethers, and alkylamines, polyhydric alcohol fatty acid glycerin esters, polyhydric alcohol fatty acid ester surfactants, polyethylene amine surfactants, and fatty acid alkyl solamide surfactants. Any compound selected from the ionic surfactants or those selected from the group consisting of two or more thereof may be used.

The auxiliary agent serves to maximize flowability of the mortar by releasing the flowability of the mixture to maintain fluidity, and aromatic aldehydes such as benzaldehyde and the like are used.

The diameter of the slag and mica is 1 to 30㎛ is best mixed, the fluidity is good.

The electromagnetic wave shielding composition relates to a mineral mixture having an electromagnetic shielding function by directly placing, spraying or plastering on a peripheral wall of a building, or assembling a building material manufactured in the form of a brick, a tile, or a plate on a wall of a building.

The choice of electromagnetic shielding composition depends on the specific conditions of use of the building facility.

In most cases, a building suitable for electromagnetic wave shielding facilities has a temperature and humidity suitable for workers, and the electromagnetic shielding composition used for shielding electromagnetic waves can be used with all kinds of binders such as cement, with the exception of relative humidity. In consideration of cold resistance according to the temperature of the winter or outside, in particular when the manufacture of the external wall panel can be used the electromagnetic shielding composition of the present invention.

Hereinafter, the present invention will be described in detail through examples.

Example 1

2 kg of slag, 1 kg of mica stone, 8.6 g of alpha olefinsulfonate, 50 g of coke and 247.7 g of naphthylformaldehyde were sufficiently stirred in water, and then 2.88 kg of calcium sulfate was mixed with the mixture to prepare a paste. Electromagnetic shielding composition was prepared. If necessary, an appropriate amount of cement may be mixed or other materials may be mixed.

Electromagnetic absorptivity was measured according to the RF method (Measurement method by TR-1730 / A of Adventest), and the results are shown in Table 1.

Example 2

After 3 kg of slag, 1.5 kg of mica stone, 8.6 g of alpha olefin sulfonate, 50 g of coke and 247.7 g of naphthylformaldehyde were sufficiently stirred in water, 2.88 kg of calcium sulfate was mixed with the mixture to prepare a paste. A paste-like composition for shielding electromagnetic waves was prepared. If necessary, an appropriate amount of cement may be mixed or other materials may be mixed.

Electromagnetic absorptivity was measured according to the RF method (Measurement method by TR-1730 / A of Adventest), and the results are shown in Table 1.

Example 3

3 kg of slag, 1 kg of mica stone, 8.6 g of alpha olefinsulfonate, 50 g of coke and 247.7 g of naphthylformaldehyde were sufficiently stirred in water, and 5.76 kg of calcium sulfate was mixed with the mixture to prepare a paste. An electromagnetic wave turnover composition was prepared. If necessary, an appropriate amount of cement may be mixed or other materials may be mixed.

Electromagnetic absorptivity was measured according to the RF method (Measurement method by TR-1730 / A of Adventest), and the results are shown in Table 1.

Table 1

The test method was measured by Adventest TR-1730 / A (signal variation of about 3db due to the resonance characteristics).

The present invention as described above, provides a composition for electromagnetic wave with excellent physical properties, can be directly installed, sprayed or plastered, or the building material manufactured in the form of bricks, tiles or plates can be installed on the wall of the building construction This is convenient, can be used as a building material desired by the consumer, it is effective to shield the electromagnetic waves harmful to the human body.

Claims (4)

In the composition for electromagnetic shielding, 10 to 20% by weight of slag having a diameter of 1 to 30 µm, 5 to 15% by weight of mica stone having a diameter of 1 to 30 µm, 0.1 to 5% by weight of a dispersant, and 1 to 5% of coke %, Benzaldehyde 0.1 to 2% by weight, a slight amount of water and 30 to 70% by weight of calcium sulfate composition for electromagnetic shielding delete The dispersing agent is an anionic surfactant such as an amine salt, a quaternary ammonium salt, a pyrimidinium salt, an anionic surfactant such as alpha olefin sulfate, and an ethylene oxide-based interface such as alkyl aryl ether, alkyl ether, or alkyl amine. It consists of any one compound selected from nonionic surfactants such as active tax, polyhydric alcohol fatty acid glycerin ester, polyhydric alcohol fatty acid ester surfactant, polyethyleneamine surfactant and fatty acid alkylzolamide surfactant, or two or more of these compounds. Electromagnetic shielding composition, characterized in that selected from the group. delete