KR100522537B1 - EMI wall paper and the method for making it - Google Patents

Abstract

      BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave absorbing wallpaper for effectively blocking an electromagnetic wave over a broadband and a method for manufacturing the same. In the electromagnetic wave absorbing wallpaper according to the present invention, an electromagnetic wave is effectively extinguished in a broadband frequency region. In addition, the manufacturing process is simple so that it can be widely applied to all industries.

That is, one or more layers of metal alloys with high permeability and conductive polymer materials with high dielectric constant and conductivity are applied onto the wallpaper, or mixed mixtures made of functional polymer resins (acrylic, modified acrylic, polyester resin, etc.) are used. It is applied on the wallpaper, or in particular, the coating or coating of high conductivity carbon and metal materials to have good electromagnetic wave absorption efficiency at broadband. In addition, the present invention is superior to the prior art in terms of the absorption efficiency of electromagnetic waves, effectively extinguish harmful electromagnetic waves (Electromagnetic wave) emitted from household and industrial electrical, electronic, mobile communication devices, caused by the excessive exposure to electromagnetic waves It will help you live a healthier life away from various diseases.

Description

Broadband electromagnetic wave absorption wallpaper and its manufacturing method {EMI wall paper and the method for making it}

The present invention relates to an electromagnetic wave absorbing wallpaper and a method of manufacturing the same for effectively blocking electromagnetic waves over a wide band, and more particularly, to a metal alloy (cender dust, ferrite, permalloy system, etc.) and a conductive polymer material (polyaniline, Polypyrrole, polythiophene, or derivatives thereof, etc.) are applied on the wallpaper more than one layer or mixed with a functional polymer resin (acrylic, modified acrylic, polyester resin, etc.) and applied on the wallpaper, high electromagnetic waves at broadband The present invention relates to a wallpaper for absorbing electromagnetic waves and a method of manufacturing the same.

The electromagnetic wave absorber is for absorbing electromagnetic waves and suppressing reflection by using magnetic losses (imaginary part of complex permeability). The electromagnetic wave absorber prevents reflected waves from occurring by converting the absorbed electromagnetic waves into heat.

In particular, ferrite has a characteristic of effectively absorbing microwaves by using a loss due to magnetic resonance between the magnetic field component of electromagnetic waves and the atomic spin system of ferrite.

It is desirable that the performance required by the technical problem of the electromagnetic wave absorbing material avoiding the detection of radio waves in an invisible plane is ≧ 20 to 30 dB, and absorbs about 99% of the radio energy at an absorption rate. Moreover, since the direction of the radar wave is not determined, it must have a characteristic that it is sufficient to be incident on a broadband and any blind spot.

As the electromagnetic wave absorber, the absorber can be absorbed at a thickness of 0.1 mm in the VHF-TV, has a large amount of attenuation at a wideband frequency, and in particular, the development of a lighter and thinner absorber has been desperately desired in recent years.

There are three kinds of material constants that cause electromagnetic wave loss: conductivity σ, dielectric loss ε ″ and magnetic loss μ ″. The loss caused by conductivity σ is called conductive loss or ohm loss, and free charge in the material It is caused by the movement of electric field and frostbite, and responds to resistance.

The dielectric loss ε ″ is caused by a late change in the dipole's temporal change that leads to heredity. It is caused by a bond electron bound to an atom, not a free electron. The spin motion that causes magnetism is caused by the late tracking of external magnetic field changes.

Conventionally, conductive loss materials widely used as electromagnetic wave absorbers include carbon, and magnetic materials include metal magnetic materials and oxide magnetic materials, and dielectric materials use barium titanate (BaTiO ₃ ) or a mixture thereof. I'm doing it.

However, the electromagnetic wave absorber using only these materials is not only difficult to process, but also has a large energy consumption during processing, which greatly increases the manufacturing cost, and because of its lack of flexibility and elongation, it is widely applied to industrialization such as being easily broken or worn during processing or use. There was a significant problem to follow.

      In order to make up for these drawbacks, the use of conductive composites such as fiber-reinforced composites and plastic composites is being developed. For example, Korean Patent Application No. 1991-25644, Thermosetting Resin Composition for Electromagnetic Shielding, Korean Patent Application No. 1999- 20817, "Method of Manufacturing Synthetic Resin for Shielding Electromagnetic Waves," and Korean Patent Application No. 1997-24215, "Compositions for Absorption of Electromagnetic Waves, Methods for Producing and Applying the Same," are disclosed. Although only applied or physically blended, although these materials are lighter than conventional metal materials and have advantages of improved processability and corrosion resistance, there is a disadvantage in that the electromagnetic wave shielding effect is weak.

     In the past, an electromagnetic wave absorber was applied to a wallpaper, and in most cases, a gravure printing surface is formed on the surface of the wallpaper, and a metal plated paper for absorbing electromagnetic waves is adhered to a thin sheet using an adhesive. It is in a state.

At this time, the metal plated paper is used to plate the plated with nickel (Ni) or copper (Cu) through a process of pretreatment, catalysis and activation in a woven or non-woven fabric.

In addition, as a prior art, in Korean Patent Application No. 2001-15116, the electromagnetic wave absorbing wallpaper has at least one material selected from the group consisting of conductive polymer material, conductive carbon and graphite having a solid content of 1 to 100% by weight. Coating agent in a state where 69% by weight, 30 to 98% by weight matrix polymer having a solid content of 1 to 50% by weight, 0 to 59% by weight of solvent and 1 to 40% by weight of additives are mixed at a predetermined ratio. After the composition is applied and coated on at least one of both sides of the base paper, a protective layer for protecting the electromagnetic shielding coating film and a pattern layer for improving the merchandise are formed as necessary, and then dried and manufactured. Wallpaper for electromagnetic shielding is made of electromagnetic shielding wallpaper using materials (conductive polymer, conductive carbon, graphite) that have large elements of reflection in electromagnetic shielding (reflection, multireflection, absorption term). By manufacturing the system, it is possible to effectively shield the electromagnetic waves when blocking the electromagnetic waves (Electromagnetic wave) emitted from household and industrial electrical, electronic, mobile communication devices from other places, but the industrial electrical, electronic, mobile communication equipment When present in the same space as the human being there is a critical problem that the shielding effect to the electromagnetic wave is significantly reduced.

       As another example of the prior art, after coating the electromagnetic wave absorber solution on the upper surface of the paper and dried, the upper surface of the electromagnetic wave absorber coating layer foamed PVC mixture to a certain thickness, and then the surface treatment agent suitable for the application is applied to the upper surface After that, a conventional post-treatment step may be performed to manufacture the electromagnetic wave shielding wallpaper.

By the way, the electromagnetic wave absorbing agent used in the above-described conventional embodiment is a dispersing agent and a lubricant based on at least one of iron oxide (Fe ₂ O ₃ ), nickel oxide (NiO), zinc oxide (ZnO), copper oxide (CuO) as a main component The PVC compound is a PVC, dioctylphosphate, stabilizer, foaming agent, TiO ₂ and CaCO ₃ is added as a filler,

The conventional electromagnetic shielding wallpaper as described above is not only difficult to manufacture and widely applicable to industrial fields, but also has high manufacturing cost and low shielding efficiency due to the use of metals and inorganic materials as electromagnetic shielding agents. There is this.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and provides an electromagnetic wave absorbing wallpaper which not only effectively destroys electromagnetic waves in the broadband frequency domain, but also makes the manufacturing process simple and widely applicable to all industrial fields. It is in

That is, one or more layers of metal alloys with high permeability and conductive polymer materials with high dielectric constant and conductivity are applied onto the wallpaper, or mixed mixtures made of functional polymer resins (acrylic, modified acrylic, polyester resin, etc.) are used. By coating on the wallpaper, or by coating or coating a particularly high conductivity carbon and metal materials, it is possible to manufacture a wallpaper having a good electromagnetic wave absorption efficiency in a broadband.

In addition, the present invention is superior to the prior art in terms of the absorption efficiency of electromagnetic waves, effectively extinguish harmful electromagnetic waves (Electromagnetic wave) emitted from household and industrial electrical, electronic, mobile communication devices, caused by the excessive exposure to electromagnetic waves It will help you live a healthier life away from various diseases.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave absorbing wallpaper for effectively extinguishing electromagnetic waves in the broadband frequency region, and a method for manufacturing the same. Polythiophene or derivatives thereof, etc.) on one or more layers of the wallpaper, mixed with a functional polymer resin (acrylic, modified acrylic, polyester resin, etc.) to make a coating on the wallpaper, especially high conductivity carbon By absorbing or coating metal materials (Flake type silver powder, copper powder, silver coated copper powder, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.) Make it efficient.

The electromagnetic wave absorbing wallpaper and the nonwoven fabric of the present invention effectively extinguish harmful electromagnetic waves emitted from household and industrial electrical, electronic, and mobile communication devices to attenuate electromagnetic waves, thereby avoiding various diseases caused by overexposure of electromagnetic waves. The purpose of this course is to enable you to enjoy life.

In the electromagnetic wave absorbing wallpaper according to the present invention, the magnetic permeability, dielectric constant and conductivity are evenly improved to obtain an excellent electromagnetic shielding effect,

Metal alloys with high permeability (cenders, ferrites, permalloy systems, etc.), conductive polymers (polyaniline, polypyrrole, polythiophene, or derivatives thereof) having advantages in permittivity and conductivity, and especially metals having excellent conductivity (plate type) Silver powder, copper powder, copper powder coated with silver, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.), and they are coated or applied in multiple layers on the wallpaper, or some of them are omitted. The method of apply | coating or mixing and apply | coating these with a functional polymer resin (acryl, modified acryl, polyester resin, etc.) is used.

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

(Example 1)

      35 to 99% by weight of polyaniline, which is a conductive polymer, and 1 to 65% by weight of flat sheet sender, which is a metal alloy, are used as acrylic resins (or acrylic emulsion resins, urethane resins, epoxy resins, polyolefin resins, polyesters) as functional polymer resins. Resin, etc.), and as a plasticizer, dioctyl phthalate, polyethylene glycol, ethylene glycol, butylbenzyl phthalate

(Butylbenzyl phthalate), tricresil phosphate (Tricresil phosphate), such as selected by using a mixture, and by using a mixture of triolein (Triolein) as a dispersant, it is possible to manufacture a coating composition for applying to the wallpaper.

     The manufacturing process is as follows.

First, each component of the functional polymer resin having the above composition is weighed and placed in a functional polymer resin manufacturing tank maintained at 25 ° C. or lower by a water jacket, and stirred by a mixer of a turbine type impeller. While completely dissolving the polymer component to produce a functional polymer resin.

   Next, 20.0-99.0% of the functional polymer resin prepared as described above, a flat alloy sender (or permalloy, ferrite series) of a metal alloy, and a polyaniline (or polypyrrole, poly (3,4-ethylene deoxythiophene)) of a conductive polymer. ] Was weighed at a composition ratio of 1.0-80.0% and placed in a slurry production tank maintained at 25 ° C. or lower by a water jacket at a speed of 1-100 rpm by a mixer made of an anchor type impeller. Mix for 5 hours to distribute the metal powder evenly.

After mixing, fill the paint in the paint storage container by automatic packing device and seal it to manufacture the final product. The electromagnetic wave absorber wallpaper of the present invention is manufactured by applying the prepared paint to the back surface of the wallpaper using a sprayer and spin coater, or by forming a thin film sheet and a film or a coating film having a desired thickness on the back of a general wall paper by a doctor blade method or a roll coating method. do.

(Example 2)

   The conductive polymer polyaniline prepared in Example 1 and the sender mixed paint of the metal alloy are applied to the surface of the adherend with a sprayer and a spin coater, or a thin film sheet having a desired thickness on the back surface of the general wall using a doctor blade method, a roll coating method, and the like. A film or a coating film is formed, and a metal silver powder (or copper powder, silver coated copper powder, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.) is coated with a doctor blade method, a roll coating method, or the like. The electromagnetic wave absorber wallpaper of the present invention is produced by molding a thin film sheet and a film or a coating film.

In the above, the metal coating by silver powder is 1.0-80.0% of silver (or copper powder, silver-coated copper powder, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.) and organic binder 20.0-99.0% The organic binder is composed of acrylic emulsion resin, acrylic resin, urethane resin, epoxy resin, polyolefin resin, polyester resin, acetic acid ethyl ester, acetic acid butyl ester ester), diethylene glycol monobutyl ether, isopropyl alcohol, acetone, dibutyl phthalate

(Dibutyl phthalate), Phosphate Ester, Ethyl Cellulose

Use one or more selected from (Ethylcellulose).

   Each component of the organic binder is weighed and placed in an organic binder manufacturing tank maintained at 25 ° C. or lower by a water jacket, and the polymer component is completely agitated with a mixer made of a turbine type impeller. Dissolve to prepare an organic binder.

   Next, 30.0 mg of silver powder (or copper powder, silver-coated copper powder, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.), which is an organic binder 70.0% prepared as described above and a conductive metal powder prepared by the coprecipitation method, was used. It is weighed at the composition ratio of% and placed in a slurry type manufacturing tank maintained at 25 ° C or lower by a water jacket, and 0.5- at a speed of 1-100 rpm by a mixer made of an anchor type impeller. 5 hours mixing

(Mixing) to evenly disperse the metal powder to obtain a coating composition.

(Example 3)

35 to 99% by weight of polyaniline (or polypyrrole, polythiophene or derivatives thereof), which are conductive polymers, or 1 to 65% by weight of flat sender (or permalloy, ferrite series), which is a metal alloy, Alternatively, each component may be weighed into an acrylic emulsion resin, urethane resin, epoxy resin, polyolefin resin, polyester resin, etc., and placed in a functional polymer resin manufacturing tank maintained at 25 ° C. or lower by a water jacket to form a turbine type. The conductive polymer paint and the metal alloy paint are prepared by completely dissolving the polymer component while stirring with a mixer made of an impeller.

The metal alloy paint prepared above is formed on the back of a general wall paper by a doctor blade method, a roll coating method, etc., and a thin film sheet and a film or a film having a desired thickness are formed, and the conductive polymer paint is formed by a doctor blade method on a metal alloy coating layer. A thin film sheet and a film or a coating film having a desired thickness are formed by a roll coating method to produce an electromagnetic wave absorbing wallpaper.

(Example 4)

      The metal alloy prepared in Example 3, sender (or permalloy, ferrite series) and conductive polymer polyaniline (or polypyrrole, polythiophene or derivatives thereof) are applied to the surface of the adherend with a sprayer and spin coater, or Form thin film sheets and films or coating films of desired thickness on top and bottom layers of normal wall paper by doctor blade method, roll coating method, etc., and use silver powder (or copper powder, copper powder coated with silver, nickel powder, aluminum powder, Tin powder, zinc powder, carbon, etc.) paint is formed by forming a thin film sheet and a film or a coating film having a desired thickness by a doctor blade method, a roll coating method, etc. to manufacture the electromagnetic wave absorber wallpaper of the present invention.

The metal coating is composed of 1.0-80.0% of silver powder (or copper powder, silver coated copper powder, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.) and an organic binder of 20.0-99.0%. , The organic binder is an acrylic emulsion resin, acrylic resin, urethane resin, epoxy resin, polyolefin resin, polyester resin, acetic acid ethyl ester, acetic acid butyl ester, Diethylene glycol monobutyl ether, Isopropyl alcohol, Acetone, Dibutyl phthalate, Phosphate ester, Ethyl cellulose

Use one or more selected from (Ethylcellulose).

   Each component of the organic binder is weighed and placed in an organic binder manufacturing tank maintained at 25 ° C. or lower by a water jacket, and the polymer component is completely agitated with a mixer made of a turbine type impeller. Dissolve to prepare an organic binder.

   Next, 30.0 mg of silver powder (or copper powder, silver-coated copper powder, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.), which is an organic binder 70.0% prepared as described above and a conductive metal powder prepared by the coprecipitation method, was used. It is weighed at the composition ratio of% and placed in a slurry type manufacturing tank maintained at 25 ° C or lower by a water jacket, and 0.5- at a speed of 1-100 rpm by a mixer made of an anchor type impeller. Mixing for 5 hours to uniformly disperse the metal powder to obtain a coating composition.

(Example 5)

     Instead of wallpaper, the paint prepared in Example 1 was coated on a non-woven polyester (or nylon, wood, oxford paper, burlap, etc.) to prepare an electromagnetic wave absorbing nonwoven fabric.

(Example 6)

     Instead of wallpaper, the paint prepared in Example 2 was first coated with a non-woven polyester (or nylon, wood, oxford paper, burlap, etc.) and then coated with a conductive polymer and a metal alloy mixed paint to coat the electromagnetic wave absorbing nonwoven fabric. Manufacture.

(Example 7)

     Instead of wallpaper, the paint prepared in Example 3 was first coated with a conductive polymer paint on a non-woven polyester (or nylon, wood, oxford paper, burlap, etc.) and then coated with a metal alloy paint to prepare an electromagnetic wave absorbing nonwoven fabric.

(Example 8)

     Instead of wallpaper, the paint prepared in Example 4 was first coated with a non-woven polyester (or nylon, wood, oxford paper, burlap, etc.), followed by metal coating, conductive polymer coating, and metal alloy coating. To produce an electromagnetic wave absorbing nonwoven fabric

On the other hand, the structure of the electromagnetic wave absorbing wallpaper according to the present invention by the accompanying drawings as follows.

1 is a first embodiment of the wallpaper according to the present invention,

In the electromagnetic wave absorbing wallpaper coated with the conductive polymer material on the wallpaper (1), the lower surface of the wallpaper (1), which is the opposite side of the printing surface, has a metal made of any one of a sendust, ferrite, permalloy system or a mixture of two or more thereof. The mixed coating layer 2, which is a mixed product of an alloy, a polyaniline, polypyrrole, polythiophene or a derivative thereof, and a functional polymer resin (acrylic, modified acrylic, polyester resin, etc.) is evenly applied. .

2 is a cross-sectional view showing a second embodiment of the wallpaper according to the present invention, in which the metal coating layer 3 is again applied together with the mixed coating layer 2 in the configuration as shown in FIG. The coating layer 3 is organic binder containing carbon and metal materials having high conductivity (Flake type silver powder, copper powder, copper powder coated with silver, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.). Prepared by dissolving in.

3 is a cross-sectional view showing a third embodiment of the wallpaper according to the present invention;

In the electromagnetic wave absorbing wallpaper coated with the conductive polymer material on the wallpaper (1), the lower surface of the wallpaper (1), which is the opposite side of the printing surface, has a metal made of any one of a sendust, ferrite, permalloy system or a mixture of two or more thereof. Metal alloy coating layer prepared by mixing an alloy and a conductive high molecular material consisting of polyaniline, polypyrrole, polythiophene or derivatives thereof with functional polymer resin (acrylic, modified acrylic, polyester resin, etc.)

(4) and the conductive polymer paint layer 5 are applied in layers.

In addition, Figure 4 is a cross-sectional view showing a fourth embodiment of the wallpaper according to the present invention, a metal coating layer 3 together with the metal alloy coating layer 4 and the conductive polymer coating layer 5 in the configuration as shown in FIG. ), The metal coating layer (3) is made of carbon, metal material (Flake type silver powder, copper powder, copper powder coated with silver, nickel powder, aluminum powder, tin powder, Zinc powder, carbon, etc.) is prepared by dissolving in an organic binder.

In the case of the electromagnetic wave absorbing wallpaper according to the present invention configured as described above, the metal alloy

Metal alloy paints by mixing (sender dust, ferrite, permalloy system, etc.) and conductive polymer materials (polyaniline, polypyrrole, polythiophene or their derivatives) with functional polymer resins (acrylic, modified acrylic, polyester resins, etc.), respectively. The layer 4 and the conductive polymer paint layer 5 may be formed separately, or the mixed paint layer 2 may be formed by mixing the metal alloy and the conductive polymer material together with the functional polymer resin. It has a great advantage, and the conductive polymer material has a great advantage of dielectric constant and conductivity, and when they are applied together to the wallpaper, it will have excellent electromagnetic shielding performance over broadband.

In addition, in the present invention, in addition to the metal alloy and the conductive polymer material, may include a metal coating layer (3) prepared by mixing a metal powder such as silver powder into an organic binder, the metal powder is particularly excellent in conductivity, so If applied to the wallpaper will have improved electromagnetic shielding performance.

As described above, the electromagnetic wave absorbing wallpaper according to the present invention not only effectively extinguishes electromagnetic waves in the broadband frequency region, but also makes the manufacturing process simple and widely applicable to all industrial fields.

That is, one or more layers of metal alloys with high permeability and conductive polymer materials with high dielectric constant and conductivity are applied onto the wallpaper, or mixed mixtures made of functional polymer resins (acrylic, modified acrylic, polyester resin, etc.) are used. It is applied on the wallpaper, or in particular, the coating or coating of high conductivity carbon and metal materials to have good electromagnetic wave absorption efficiency at broadband.

In addition, the present invention is superior to the prior art in terms of the absorption efficiency of electromagnetic waves, effectively extinguish harmful electromagnetic waves (Electromagnetic wave) emitted from household and industrial electrical, electronic, mobile communication devices, caused by the excessive exposure to electromagnetic waves It will help you live a healthier life away from various diseases.

1 is a cross-sectional view showing a first embodiment of a wallpaper according to the present invention;

2 is a cross-sectional view showing a second embodiment of the wallpaper according to the present invention;

3 is a cross-sectional view showing a third embodiment of the wallpaper according to the present invention;

4 is a sectional view showing a fourth embodiment of the wallpaper according to the present invention;

* Explanation of symbols for the main parts of the drawings

1: wallpaper 2: mixed paint layer

3: metal coating layer 4: metal alloy coating layer

  5: conductive polymer coating layer

Claims (11)

      In the electromagnetic wave absorbing wallpaper coated with the conductive polymer material on the wallpaper (1), the lower surface of the wallpaper (1), which is the opposite side of the printing surface, has a metal made of any one of a sendust, ferrite, permalloy system or a mixture of two or more thereof. The mixed coating layer 2, which is a mixed product of an alloy, a polyaniline, polypyrrole, polythiophene or a derivative thereof, and a functional polymer resin (acrylic, modified acrylic, polyester resin, etc.) is applied evenly. A wallpaper for absorbing broadband electromagnetic waves. The metal coating layer according to claim 1, wherein carbon and metal materials (plate-like silver powder, copper powder, silver-coated copper powder, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.) are dissolved in an organic binder. (3) is a wallpaper coated with a broadband electromagnetic wave, characterized in that the layer is applied together with the mixed paint layer (2). In the electromagnetic wave absorbing wallpaper coated with the conductive polymer material on the wallpaper (1), the lower surface of the wallpaper (1), which is the opposite side of the printing surface, has a metal made of any one of a sendust, ferrite, permalloy system or a mixture of two or more thereof. A metal alloy coating layer 4 and a conductive polymer prepared by mixing an alloy, a conductive high molecular material consisting of polyaniline, polypyrrole, polythiophene or derivatives thereof with a functional polymer resin (acrylic, modified acrylic, polyester resin, etc.), respectively. The wallpaper for broadband electromagnetic wave absorption, characterized in that the coating layer (5) is applied in layers. 4. The metal coating layer according to claim 3, wherein carbon and metal materials (plate-like silver powder, copper powder, silver-coated copper powder, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.) are dissolved in an organic binder. (3) is applied in a layered manner together with the metal alloy coating layer (4) and the conductive polymer coating layer (5), the broadband electromagnetic wave absorption wallpaper. The method of claim 1 or 3, wherein the conductive polymer material is 35 to 99% by weight, the metal alloy is 1 to 65% by weight, acrylic resin (or acrylic emulsion resin, urethane resin, epoxy resin, polyolefin coefficient of the functional polymer resin) Paper, polyester resins, etc.), but the functional polymer resin is used to be 20 to 99.9 weight percent of the total mixture. The metal coating layer (3) according to claim 2 or 4, wherein the metal coating layer (3) is a silver powder (or copper powder, silver-coated copper powder, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.) 1.0. -80.0% and organic binder 20.0-99.0%, the organic binder is an acrylic emulsion resin, acrylic resin, urethane resin, epoxy resin, polyolefin resin, polyester resin, acetic acid ethyl ester (Acetic acid ethyl ester) , Acetic acid butyl ester, diethylene glycol monobutyl ether, isopropyl alcohol, acetone, dibutyl phthalate, phosphate ester Phosphate esther), broadband wallpaper for absorbing electromagnetic waves, characterized in that a mixture of one or more selected from ethylcellulose (Ethylcellulose). The method according to claim 1 or 2, wherein as a plasticizer, dioctyl phthalate, polyethylene glycol, ethylene glycol glycol), butylbenzyl phthalate, tricresyl phosphate (Tricresil phosphate) mixed one selected and used as a dispersant triolein A wallpaper for absorbing broadband electromagnetic waves, wherein the mixed paint layer 2 is formed by adding (Triolein). In the manufacturing method of the wallpaper for absorbing broadband electromagnetic waves produced by applying a thin coating of conductive polymer material on the wallpaper (1), First, the functional polymer resin of claim 1 is placed in a manufacturing tank and stirred with a turbine type impeller until the polymer component is completely dissolved. 20.0-99.0% of the functional polymer resin thus prepared, a plate-type sender (or permalloy, ferrite series) of a metal alloy, and polyaniline (or polypyrrole, poly (3,4-ethylene deoxythiophene)) of a conductive polymer It is weighed at a composition ratio of 1.0-80.0% and placed in a slurry production tank, and the paint is prepared by stirring with an anchor type impeller until the metal powder is evenly dispersed. Apply the prepared paint to the back surface of the adherend with a sprayer and spin coater, or form a mixed paint layer (2) by thin film sheet or coating film of desired thickness on the back side of general wall paper by doctor blade method or roll coating method. The manufacturing method of wallpaper for absorbing broadband electromagnetic waves. In the manufacturing method of the wallpaper for absorbing broadband electromagnetic waves produced by applying a thin coating of conductive polymer material on the wallpaper (1), First, the functional polymer resin of claim 3 is placed in a production tank and stirred with a turbine type impeller until the polymer component is completely dissolved. 35 to 99% by weight of polyaniline (or polypyrrole, polythiophene or derivatives thereof), which is a conductive polymer, or 1 to 65% by weight, of flat type sendust (or permalloy, ferrite series), which is a metal alloy, is added to the functional polymer resin, respectively. After weighing the ingredients in the manufacturing tank and stirring with a turbine-type impeller (Mixer) while completely dissolving the polymer components to prepare a conductive polymer paint and metal alloy paint, respectively. Broadband electromagnetic wave absorption is characterized in that the conductive polymer coating layer (5) and the metal alloy coating layer (4) are formed in layers by sequentially forming a thin film sheet and a coating film on the back side of a general wall paper by a doctor blade method or a roll coating method. Method of making a wallpaper for the dragon. 10. The silver powder (or copper powder, silver-coated copper powder, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.) according to claim 8 or 9, separate from the mixed paint layer (2). The paint is formed by forming a metal coating layer 3 by a thin film sheet or a coating film having a desired thickness using a doctor blade method, a roll coating method, etc. The metal coating layer 3 is obtained by first placing the organic binder of claim 6 in a production tank and Stir with a turbine type impeller until the components are completely dissolved,    70.0% of the organic binder thus prepared and silver powder (or copper powder, silver-coated copper powder, nickel powder, aluminum powder, tin powder, zinc powder, carbon, etc.) of 30.0% Method of manufacturing a broadband electromagnetic wave absorption wallpaper characterized in that it is prepared by weighing the composition ratio into a slurry type manufacturing tank and stirring with an anchor type impeller until the metal powder is evenly dispersed. . 5. The broadband electromagnetic wave according to any one of claims 1 to 4, wherein various paint layers are applied to the surface of polyester (or nylon, wood, oxford paper, burlap, etc.) which is a nonwoven fabric instead of the wallpaper (1). Absorbent nonwoven fabric.