WO2019103391A1 - Indoor soundproof curtain having excellent thermal insulation - Google Patents

Abstract

The present invention relates to an indoor soundproof curtain having excellent sound insulation and sound absorption, thereby enabling a quiet and cozy indoor atmosphere to be maintained, and having excellent light shielding properties and thermal insulation, thereby enabling daily life to be pleasantly carried on with at an optimal room temperature. The present invention provides an indoor soundproof curtain having excellent thermal insulation, the indoor soundproof curtain comprising: a fiber pad comprising a fiber web comprising meltblown microfibers formed from a thermoplastic resin, and a non-woven fabric formed on both sides of the fiber web; an electromagnetic wave shielding sheet attached to one surface of the fiber pad; a soundproofing sheet formed from a thermoplastic elastomer (TPE) and coupled to the other surface of the fiber pad; an adhesive sheet coated on both surfaces of the soundproofing sheet so as to enable the fiber pad and carbon fiber felt to be adhesively coupled; and the carbon fiber felt adhesively coupled to the soundproofing sheet by means of the adhesive sheet, and formed by binding a plurality of carbon fiber fabrics by interlacing carbon fibers by needle punching.

Description

Soundproofing curtain with excellent insulation

The present invention relates to a curtain, and more particularly, to an interior sound-insulating curtain which can maintain a quiet and cozy indoor atmosphere due to excellent car sound and sound absorption, and is excellent in light shielding property and heat insulation property to enable a comfortable living at an optimal room temperature .

Recently, as the types of noise sources are becoming more and more diverse, noise pollution entering the room becomes serious, and legal regulations for regulating the noise level between the interlayer and the generation are strengthened. In addition, a large amount of heat input and heat loss occurs through the window. As the size of the window increases, the amount of heat input and heat loss increases, and double windows are installed. Especially, in the subtropical and tropical regions, indoor temperature is increased due to high outside temperature and intense sunlight, and indoor living is not pleasant, and energy consumption is greatly increased as the amount of operation of the cooling device is increased. In recent years, domestic and foreign building fires are spreading rapidly through indoor curtains, smoke and toxic gases are generated, resulting in accidents. Korean Patent Registration No. 10-1779559 discloses a soundproof curtain including a rail, a sound insulating film, a wrinkle film and a sound absorbing material in the prior art. In addition, there exist aluminum multilayer insulating curtains including a woven or woven fabric in the form of a woven or knitted fabric using aluminum strips and fiber yarns having a predetermined width, and a thermal insulation material used for insulation purposes. However, the above-mentioned conventional art has a problem that soundproofing and heat insulation performance is poor, and it is not possible to provide incombustibility and can not prevent the generation of flames and toxic gas generation, so that it is vulnerable to fire, and harmful electromagnetic waves generated from electronic equipment can not be blocked .

An object of the present invention is to provide a lightweight, excellent non-combustible, non-combustible, non-combustible, excellent heat insulating material that maintains a comfortable living environment at an optimal room temperature, increases building energy efficiency, maintains a quiet and cozy indoor atmosphere with excellent sound absorption and sound- It is an object of the present invention to provide a curtain which has electromagnetic wave shielding performance, prevents static electricity, is excellent in stretchability, is easily restored, is not deformed well, and has improved durability.

The present invention relates to a fiber pad comprising a fibrous web comprising meltblown microfine fibers made of a thermoplastic resin and a nonwoven fabric formed on both sides of the fibrous web; An electromagnetic wave shielding sheet attached to one surface of a fiber pad; A soundproof sheet made of a thermoplastic elastomer (TPE) bonded to a back surface of a fiber pad; An adhesive sheet formed on both sides of the soundproof sheet to bond the fiber pads and the carbon fiber felt together; And a carbon fiber felt adhered to the soundproof sheet through the adhesive sheet and entangled with the carbon fibers by needle punching to bind the plurality of carbon fiber fabrics together.

The present invention can provide a comfortable living environment at an optimal room temperature due to its light and excellent non-flammability due to its excellent non-combustibility, excellent heat insulation property, increased building energy efficiency, excellent sound absorption and sound insulation performance, It has an electromagnetic wave shielding performance, is prevented from static electricity, is excellent in stretchability, is easily restored, is not deformed well, and has improved durability.

1 is a use state diagram of an interior soundproofing curtain according to the present invention. FIG. 2A is a cross-sectional view of an indoor soundproofing curtain according to the present invention, FIG. 2B is an enlarged view of part A of FIG. 2A, and FIG. 2C is an enlarged view of part B of FIG. 2A. Fig. 3 shows an apparatus for producing a fibrous web of the present invention. 4 is a photograph showing meltblown microfibers. FIG. 5A is a photograph of the fiber web structure of the present invention, and FIG. 5B is a photograph of the fiber web section of the present invention taken by an electron microscope. FIG. 6A is a view showing the electromagnetic shielding sheet of the present invention, and FIG. 6B is an electron microscope photograph of the hollow tube of the present invention. 7 is a photograph of a fiber pad according to an embodiment of the present invention. Fig. 8 is a cross-sectional view showing a line-shaped groove formed in the room soundproofing curtain of the present invention. 9A to 9C are diagrams showing the constitution of the carbon fiber felt.

1 to 2C, the present invention relates to a fiber pad 100, an electromagnetic wave shielding sheet 200, a soundproof sheet 300, an adhesive sheet 400, a carbon fiber felt 500, In whole or in part. 7, the fiber pad 100 includes a fibrous web 110 including a meltblown microfiber made of a thermoplastic resin and a nonwoven fabric 120 formed on both surfaces of the fibrous web 110. The fibrous web 410 is produced by the fibrous web layer producing apparatus 10 shown in Fig. First, the thermoplastic resin is metered into the extruder 11, the additives are added, kneaded, melted by the heat applied through the thermal jacket and the pressure applied by the frictional heat and the screw rotation, The fibers are radiated in the direction of the collector 17 by passing through the dozens of orifices 13. At this time, high-temperature and high-speed compressed air is jetted from the nozzle 14 provided inside the spinning band 12 to collide with the fibers and to be blown thinly through the orifices 13, whereby the meltblown micro- . A fiber feeder 15 for feeding fibers to the lower side of the spinning band 12 is provided and the fiber feeder 15 feeds the staple fibers 30 to a position where the meltblown microfibers 20 are radiated, A fibrous web 110 is made. Such air blending is made by mixing 60 to 80% of meltblown microfine fibers 20 by weight and 20 to 40% of staple fibers 30 by weight. As described above, if the staple fiber 30 is less than 20% in the absorbent web 110, the recovery rate against the pressing force may be lowered. If the staple fiber 30 exceeds 40% in the fibrous web 110, ) Layer is not formed well and the air-blending is not performed well, so that the bonding strength can be weakened. The air-blended fibers are deposited on the collector 17 without passing through or in the form of a deforming device 16 and are continuously and horizontally and vertically stacked to form a composite fibrous web 110 of tangential horizontal and vertical layers And the structure and cross section of such a fibrous web 110 are shown in Figures 5A and 5B. At this time, the collector 17 may be a rotary drum, a moving belt, etc., and controls the rotation speed of the collector 17 to adjust the thickness of the fiber web 110. That is, when the rotation speed of the collector 17 is set to a low speed, the fiber web 110 is formed thick, and when the rotation speed of the collector 17 is made high, the thickness of the fiber web 110 becomes thin. The air blended meltblown microfibers 20 and staple fibers 30 collected on the collector 17 are joined together to form a fibrous web 110 while being cooled. The meltblown microfibers 20 may be made of a thermoplastic resin such as polyethylene, polypropylene, polyester, polyamide, or polycarbonate. The meltblown microfibers 20 are microfibers having an average diameter of 1 to 3 m in 50 to 60% by weight, and microfibers having an average diameter of 0.3 to 1 m (not including 1) in 20 to 30% , And 10 to 20% may be composed of an ultrafine fiber having an average diameter of 0.1 to 0.3 mu m (not including 0.3). As described above, since the layered structure of the fibrous web is well developed and the volume feeling is increased by composing the microfiber and the microfibers having various sizes to be blended together, the fibrous web layer can be well formed, the high density structure can be maintained, Many air layers and microfibers are intertwined between the fibrous layers of the fibrous layer, so that the number of fiber strands increases and the surface area increases in the same volume as the aggregation strength increases, so that the heat insulation and the sound absorption performance can be greatly improved. The nonwoven fabric 120 is attached to both sides of the fibrous web 110 to protect the fibrous web 110 from the outside and contains 30 to 40% by weight of cotton, 30 to 40% of cellulose and 20 to 30% of polyester And the fibers are arranged in parallel or in a negative direction to form a thin felt web. Line method in which the nonwoven fabric 120 unwound by another feeding device is bonded to the absorbent web 110 and then the calender roll is completed to complete the interlayer adhesion, It is preferable that it is excellent, is environment-friendly, has no wrinkles or wrinkles, can be rapidly adhered, and the working efficiency is increased. The electromagnetic wave shielding sheet 200 is attached to one surface of the fiber pad 100.

6A, a foil layer 220 made of an aluminum foil may be further formed between the fiber pad 100 and the electromagnetic shielding sheet 200, and the foil layer 220 may reinforce the room soundproofing curtain 1 , Shielding, insulation and electromagnetic wave shielding effect. 6A and 6B, an electromagnetic shielding sheet 200 includes a plurality of hollow tubes 212 having elongated holes 212 formed therein and thin metal membranes 211 made of different conductive metals on the outer surface thereof. 210). The hollow tube 210 is formed by sequentially depositing different conductive metals on a polypropylene fiber having a fine diameter of 5 to 10 mu m in a temperature range of 75 to 85 DEG C for about 1 hour to sequentially form a thin After the formation of the metal membranes 211, the elongated holes 212 are formed by selectively burning only the polypropylene fibers by applying heat at 500 ° C or higher in an inert atmosphere for 1 to 2 hours so as to form the elongated holes 212 therein. The hollow tube 210 can absorb electromagnetic waves. The electromagnetic shielding sheet (200) according to claim 1, wherein the electromagnetic shielding sheet (200) comprises 20 to 30% by weight of EVA resin, 5 to 10% by weight of silicone resin, 50 to 60% by weight of dimethylformamide, 5 to 10% 0.5 to 1.5% by weight of methyl methacrylate, and 0.5 to 1.5% by weight of acrylic emulsion resin. The EVA resin is a polymer obtained by copolymerizing ethylene and a vinyl acetate monomer. The EVA resin is excellent in elasticity and flexibility and is excellent in durability and is not easily broken by an external impact, and 20 to 30% by weight is added in the present invention. The silicone resin is contained in an amount of 5 to 10% by weight, and is excellent in the coating power and water repellency against the metal powder and the hollow tube, thereby preventing the metal component from contact with the outside air and moisture, and is excellent in heat resistance. Dimethylformamide is added as a solvent in an amount of 50 to 60% by weight. The metal powder includes 5 to 10% by weight of conductive metal powder particles, the hollow tube 150 contains 1 to 5% by weight, and is uniformly dispersed in the electromagnetic shielding sheet 200 to function as an electromagnetic wave shielding function. Methyl methacrylate is added as a dispersant in an amount of 0.5 to 1.5% by weight to separate the metal powders and hollow tubes so that they can be dispersed evenly without aggregation. The acrylic emulsion resin includes 0.5 to 1.5% by weight. The oxidation of the metal powder and the hollow tube may occur during the manufacturing process of the electromagnetic shielding sheet 200 or during the salt water spray test process after the manufacturing process. Therefore, when a small amount of the acrylic emulsion resin is mixed with the electromagnetic shielding sheet 200, the corrosion resistance and the weather resistance are increased and the metal component is prevented from being oxidized.

In addition, it is necessary to prevent oxidation of the metal included in the electromagnetic wave shielding sheet 200 during use of the room soundproofing curtain 1 of the present invention. That is, when the metal powder made of the conductive metal and the hollow tube are oxidized, an oxidation coating is formed and the conductivity may be lost. Therefore, it is preferable that the metal oxidation preventing sheet 250 is further attached to both sides of the electromagnetic shielding sheet 200 . To this end, the metal oxidation preventive sheet 250 may contain 5 to 15% by weight of graphene oxide, 30 to 45% by weight of dimethylformamide, 40 to 55% by weight of tetrahydrofuran, 0.5 to 1.5% by weight of alkyl benzene sulfonate, Acrylate and 0.5 to 1.5 wt% of acrylate. Graphite is a structure in which carbon atoms are stacked in layers like honeycomb hexagonal nets. One layer of graphite is called graphene, and these graphenes are atoms in which carbon atoms are connected by SP ² bonds, And the carbon atom is a hexagonal structure. Graphene oxide is a plate-shaped carbon material produced by acid treatment of graphite and has many functional groups. The oxidizing groups on the surface generated through the acid treatment process naturally form hydrogen bond with H ₂ O, Lt; / RTI > slurry. The graphene oxide used in the present invention is obtained by removing slurry and then removing moisture, and is contained in an amount of 5 to 15% by weight. When such a graphic oxide is applied, it functions to prevent oxidation of the metal. When the graphene oxide content is less than 5% by weight, the antioxidant effect is lowered and is not uniformly coated. When the graphene oxide content is more than 15% by weight, the graphene oxides are aggregated with each other to reduce the oxidation preventing effect by the coating. Since the method for producing graphene oxide is already known, its manufacturing method will be omitted. Dimethylformamide and tetrahydrofuran are used as a solvent, and each contains 30 to 45% by weight and 40 to 55% by weight, respectively. These solvents are not well denatured and increase the dispersibility of graphene oxide. When the content of dimethylformamide is less than 30% by weight, the dispersibility of the graphene oxide may be lowered and the graphene oxides may be aggregated with each other. If the content of dimethylformamide is more than 45% by weight, the graphene oxide concentration may decrease and the coating effect may decrease. The alkylbenzenesulfonic acid salt is added in an amount of 0.5 to 1.5% by weight to function as a stable emulsifier, increase dispersibility, and have a rust-preventive function. The butyl alcohol acrylate is added in an amount of 0.5 to 1.5% by weight to increase the dispersibility of the graphene oxide. The soundproof sheet 300 is made of a thermoplastic elastomer (TPE) and is often called an elastomer and is bonded to the back surface of the fiber pad 100, which is the opposite surface of the attachment surface of the electromagnetic shielding sheet 200. Thermoplastic Elastomer (TPE) has both rubber and plastic properties, so it is harder than rubber, more elastic than plastic, excellent in restoring force, excellent sound insulation to cut off noise, absorbs external impact, Adhesion with other materials is increased. To this end, the soundproof sheet 300 is made of a polyolefin resin comprising 50 to 70 wt% of a polyolefin resin, 20 to 40 wt% of EPM rubber, 0.5 to 2 wt% of carbonylbiscaprolactam, 1 to 5 wt% of tetrahydrofurfuryl methacrylate, 0.5 to 3% by weight of 1,6-hexanediol diacrylate, 0.5 to 3% by weight of N, N'-m-phenylene dimaleimide, 0.5 to 3% by weight of stannic chloride, By weight, and 0.1 to 1.0% by weight of p, p'-oxybisbenzenesulfonylhydrazide. The polyolefin-based resin imparts elasticity, improves rigidity and heat resistance, and improves the flowability of the elastomer due to its low viscosity when mixed with EPM rubber. As such polyolefin-based resins, isotactic polypropylene, ethylene-propylene copolymer and the like can be used. It is preferable that the polyolefin resin is contained in an amount of 50 to 70% by weight. If it is less than 50% by weight, the flowability and heat resistance may be deteriorated. If it exceeds 70% by weight, the elasticity and flexibility of the elastomer may be deteriorated, . The EPM rubber is an ethylene-propylene copolymer rubber, and an ethylene-propylene copolymer rubber can be used. The EPM rubber has elasticity and exhibits elasticity and flexibility. The EPM rubber is preferably contained in an amount of 20 to 40% by weight. If it is less than 20% by weight, elasticity and flexibility may be deteriorated. If the EPM rubber is more than 40% by weight, heat resistance and flowability may be deteriorated, . The carbonylbiscaprolactam is added to improve the heat resistance of the thermoplastic elastic sheet 200 without deteriorating heat, so as to increase the resistance against heat that can be transmitted through the carbon fiber felt 500 during a fire. The carbonylbiscaprolactam is preferably contained in an amount of 0.5 to 2% by weight. Tetrahydrofurfuryl methacrylate is added in an amount of 1 to 5% by weight, and functions as a diluent, thereby enhancing adhesion. Dipropylene glycol diacrylate and 1,6-hexanediol diacrylate are each included as a crosslinking agent in an amount of 0.5 to 3% by weight, respectively. The molecular sieve may be connected to form a polymer, and the crosslinking density may be increased to enhance mechanical properties . The N, N'-m-phenylene dimaleimide is contained in an amount of 0.5 to 3% by weight as a crosslinking aid, which is highly reactive so that a rapid crosslinking reaction can take place. Stannous chloride is contained in an amount of 0.5 to 1.5% by weight, which increases the chemical reaction rate and accelerates crosslinking to activate. The p, p'-oxybisbenzenesulfonylhydrazide is contained in an amount of 0.1 to 1.0% by weight and functions as a foaming agent. In addition, the soundproof sheet 300 is coated with a coating layer 310 containing a mixture of loess powder and white carbon powder, and then an adhesive sheet 400 is formed on the coating layer 310 to bond with the carbon fiber felt 500. The coating layer 310 is composed of 50 to 70 parts by weight of the white coal powder, 5 to 10 parts by weight of the pine needle powder, 150 to 200 parts by weight of the ion exchange water, 30 to 50 parts by weight of the aqueous polyurethane resin, 0.5 to 1 part by weight of the bodymimide and other additives. Hwangto has beneficial for health and environment because it has purifying action such as toxin removal, excellent breathability, humidity control ability and deodorization function. This loess powder is included to reduce the unpleasant odor of the human body, thus enabling a pleasant and safe life. Charcoal is made of solid wood such as oak tree, and carries more carbon than charcoal. Carbon content is 90 to 95%, ash contains about 2%, and contains a very small amount of water. Such a flour is a porous structure containing a large amount of minerals, absorbing odor and moisture, generating anion to purify the air, and emitting far-infrared rays. It is known that 50 to 70 parts by weight . Pine pine powder can be deodorized, preserved and antibacterialized to increase the durability of the curtain. Ion exchanged water does not affect the action of other components due to removal of cations and anions, and is mixed with ion exchanged water by mixing yellow clay powder, white coal powder, pine powder, and aqueous polyurethane resin. The aqueous polyurethane resin is added with 30 to 50 parts by weight per 100 parts by weight of the loess powder, and acts as a binder. The aqueous polyurethane resin has waterproofness, heat resistance and excellent rebound resilience and is tightly bonded to the soundproof sheet 300, And is stabilized by using a curing agent and other additives.

The adhesive sheet 400 is formed on both sides of the soundproof sheet 300 so that the fiber pad 100 and the carbon fiber felt 500 are bonded together. The adhesive sheet 400 may be formed by mixing a silicate mixture with 5 to 10 parts by weight of a mineral fiber and 5 to 10 parts by weight of a curing agent per 100 parts by weight of the silicate mixture. The sodium silicate, potassium silicate, and lithium silicate, which are provided as the basic liquid phase receptors of the silicate mixture, are non-toxic, non-flammable and non-toxic in the aqueous phase and contained in the adhesive sheet 400 to form hard, . In addition, the mineral fiber includes 5 to 10 parts by weight per 100 parts by weight of the silicate mixture. It prevents cracking of the adhesive layer during the drying and curing process, secures the thickening and flexibility, and provides a predetermined strength. The electromagnetic shielding sheet 200 bonded to one surface of the fiber pad 100 and the soundproof sheet 300 having the adhesive sheet 400 bonded to the back surface of the fiber pad 100 are partially And the adhesive sheet 400 is placed on the soundproof sheet 300 so that the carbon fiber felt 500 can be adhesively bonded. Referring to FIG. 8, a plurality of linear grooves L spaced apart from each other along the longitudinal direction are formed by joining as described above, whereby the room soundproofing curtain 1, which is connected to the curtain frame by a loop as shown in FIG. 1, . The carbon fiber felt 500 is adhered to the soundproof sheet 300 through the adhesive sheet 400 and is formed by binding a plurality of carbon fiber fabrics 510 by entangling the carbon fibers by needle punching. Carbon fiber is a fibrous form of carbon material. It has a fibrous shape with a carbon content of 90% or more, and exhibits excellent properties especially at high temperatures. Unlike metals, which have lower mechanical strength at higher temperatures, they have the characteristic of increasing mechanical strength as temperature increases. They are considered to be the only materials that can be used up to 3,000 ° C in a non-oxidizing atmosphere with a low coefficient of thermal expansion. The carbon fiber is classified into PAN-based carbon fiber, rayon-based carbon fiber and pitch-based carbon fiber according to the raw material. A carbon material, called a pre-cursor, is heated at a carbonization temperature of 800 to 1,500 占 폚 to produce carbon fibers having a diameter of 5 to 15 占 퐉 mainly composed of only carbon by pyrolysis of the organic material. The carbon fiber fabric 510 is manufactured through a process such as carding and the like of the carbon fiber. Here, the carbon fiber fabric 510 refers to a sheet-like carbon fiber fabric that is not entangled by needle punching. It is preferable that the carbon fiber fabric 510 includes all or part of ultra high modulus type (UHM) carbon fibers having a tensile elastic modulus of 600 GPa or more and a very high elastic modulus. The carbon fiber fabric 510 has irregularly entangled carbon fibers.

9A to 9C, a plurality of carbon fiber fabrics 510 are bundled together by laminating carbon fiber fabrics 510 according to need and needle punching to bind the carbon fibers 500. As a result, A felt 500 is produced. That is, the carbon fibers 510 penetrate in the thickness direction of the carbon fiber fabric 510 by needle punching, and the carbon fiber fabrics 510 are interfaced and fixed in a laminated state. Some carbon fibers constituting the upper carbon fiber fabric 511 and the lower carbon fiber fabric 512 located at upper and lower portions of the stacked carbon fiber fabrics 510 are lowered or raised by needle punching, And is entangled with the carbon fiber fabric 513. However, if the carbon fibers penetrate vertically through the surface of the carbon fiber felt 500, the carbon fibers penetrating vertically may act as a heat transfer path to reduce the incombustibility. Therefore, In the oblique direction so as to have an angle of 15 to 30 degrees with respect to the surface of the substrate. This can extend the heat transfer path and reduce the amount of heat dissipation. If the angle exceeds 30 °, the effect of reducing the heat radiation amount may be deteriorated. If the angle is less than 15 °, the needle punching operation is difficult and the fixing force between the fabrics may be deteriorated. When the carbon fiber fabric 510 is mixed with the carbon fibers and the polypropylene fibers and then heat-treated to the mixed fibers at a temperature of 500 ° C or higher, only the polypropylene fibers entangled with the carbon fibers are selectively burned and removed, A plurality of gaps are formed between the electrodes. An air layer is formed along these gaps to impart stretchability and heat insulation. At this time, the polypropylene fiber is preferably mixed with 5 to 10 parts by weight (not including 10 parts by weight) per 100 parts by weight of the carbon fiber. When the polypropylene fibers are mixed in an amount of less than 5 parts by weight, the gap between the carbon fibers is insufficient and the stretchability and the heat insulating property are deteriorated. When the polypropylene fibers are mixed in the amount of 10 parts by weight or more, the density of the carbon fibers may decrease and the flame- . If a large number of gaps are formed in all of the carbon fiber fabrics 510 constituting the carbon fiber felt 500, the incombustibility may be lowered or the fixing force between the fabrics may be lowered. Therefore, It is preferable that a gap is formed only in the single or plural intermediate carbon fiber fabrics 513 interposed between the upper carbon fiber fabric 511 and the lower carbon fiber fabric 512 located at the lower part. Since the outer surface of the carbon fiber felt 500 can be installed so as to be exposed to the inside of the room, the outer skin member 600 is not required to be separately used because the outer surface is soft. The outer member 600 may be made of natural fiber or synthetic fiber, which is bonded to the fiber pad 100 and the carbon fiber felt 500 by sewing or punching, so as to surround the outside of the room soundproofing curtain.

Hereinafter, an embodiment of the room soundproofing curtain 1 of the present invention will be described in detail.

[Description 1]

A fibrous web was produced by the fibrous web layer producing apparatus 10 shown in Fig. Specifically, a thermoplastic resin composition consisting of a homopolymer H7914 polymer resin manufactured by LG Chemical Co., Ltd., having an application index (230 ° C) of 1400 g / 10 min, a UV stabilizer, and an oxidative stabilizer was added to the extruder. The thermoplastic resin composition was kneaded, heated and compressed by rotating the extruder 80 times per minute. The kneaded composition was then spun radially and passed through an orifice to spin the fibers towards the collector. During this spinning, the fibers collide with the high-temperature and high-speed compressed air injected from the injection port provided symmetrically in the inside of the spinning bed to form meltblown microfibers made of polypropylene having an average fiber thickness of 2 μm. At this time, the polyester fiber staple fiber (fineness 5 denier) is supplied to the position where the meltblown microfibers are radiated by using the fiber feeder installed on the lower side of the spinneret so that the meltblown microfiber coming out of the orifice and the weight ratio of 3: 7 Fused. Half of the mixed fibers reach the collector without going through the deformation device and are stacked in the horizontal direction and the other half are vertically deformed in the direction of the fiber through the deformation device and stacked in the vertical direction on the laminated fibers in the horizontal direction, A fiber web having a weight of 600 g / m < 2 > was prepared and wound on a winder. Then, a sheet-like nonwoven fabric was laminated on both sides of the fibrous web by ultrasonic bonding to prepare a fiber pad 100 having a thickness of 15 mm. Then, the electromagnetic wave shielding sheet 200 is formed on one side of the fiber pad 100. That is, a mixture of 25 wt% of EVA resin, 7.5 wt% of silicone resin, 56 wt% of dimethylformamide, 7 wt% of copper powder, 3 wt% of hollow tube, 0.8 wt% of methyl methacrylate and 0.7 wt% of acrylic emulsion resin The electromagnetic wave shielding sheet 200 is formed on one surface of the fiber pad 100 by applying and curing. At this time, polypropylene fibers having a fine average diameter of 6 mu m through electroless plating were immersed in a plating solution at a temperature of 80 DEG C for about one hour to form nickel tubes and cobalt tubes each having a thickness of 12 mu m , Heat treatment is carried out in an inert gas atmosphere at a temperature of 700 ° C for about 1 hour to selectively remove the polypropylene fibers to form elongated and thin elongated holes. Subsequently, a polyolefin-based resin was added in an amount of 65 wt%, EPM rubber 25 wt%, carbonylbiscaprolactam 1 wt%, tetrahydrofurfuryl methacrylate 3 wt%, dipropylene glycol diacrylate 2 wt%, 1,6-hexane 1.5% by weight of diol diacrylate, 1% by weight of N, N'-m-phenylenedimaleimide, 1% by weight of stannic chloride, and 0.5% by weight of p, p'-oxybisbenzenesulfonylhydrazide A soundproof sheet 300 of 5 mm thickness prepared by curing is prepared. Then, a silicate mixture composed of 36 wt% of liquid sodium silicate, 27 wt% of liquid phase potassium silicate, 27 wt% of liquid lithium silicate, 7 wt% of colloidal silica and 3 wt% of ion exchange water, 8 parts by weight of a fiber and 7 parts by weight of a curing agent were mixed to prepare a composition of the adhesive sheet (400). In addition, upper and lower carbon fiber fabrics 511 and 512 were prepared with ultra high modulus (UHM) carbon fibers, and ultra high modulus (UHM) carbon fibers and polypropylene fibers were mixed. And the intermediate carbon fiber fabric 513 is produced by burning only the polypropylene fibers. Subsequently, the intermediate carbon fiber fabric 513 is laminated between the upper and lower carbon fiber fabrics 511 and 512, and the carbon fibers are entangled by needle punching to bind the plurality of carbon fiber fabrics so that a carbon fiber felt (500). The composition of the adhesive sheet 400 is applied to both sides of the soundproof sheet 300 to bond the fiber pads 100 to which the electromagnetic shielding sheet 200 is attached and the carbon fiber felt 500, 1).

[Advantage 2]

The room soundproofing curtain 1 was manufactured under the same constitution and conditions as in the case of the above-described Example 1 except that the surface of the soundproofing sheet 300 was coated with yellow clay powder, 60 parts by weight of the white coal powder per 100 parts by weight of the yellow clay powder, 180 parts by weight of ion-exchanged water, 45 parts by weight of an aqueous polyurethane resin, and 0.7 parts by weight of dicyclohexylcarbodiimide were coated and cured to form a coating layer 310. Thereafter, The sheet 400 was formed and the carbon fiber felt 500 was adhesively bonded to produce the room soundproofing curtain 1.

[Practical Example 3]

The interior soundproofing curtain 1 is manufactured with the same constitution and conditions as those of the above-described Example 1, and the metal oxidation preventing sheet 250 is coated on both sides of the electromagnetic shielding sheet 200. That is, after mixing 10% by weight of graphene oxide, 40% by weight of dimethylformamide, 48% by weight of tetrahydrofuran, 1.0% by weight of alkylbenzenesulfonate and 1.0% by weight of butyl alcohol acrylate, And the metal oxidation preventing sheet 250 is formed. The fiber pad 100 on which the electromagnetic shielding sheet 200 and the metal oxidation preventing sheet 250 are formed and the carbon fiber felt 500 are coated with the composition of the adhesive sheet 400 on both sides of the soundproofing sheet 300, To thereby produce an in-room soundproofing curtain (1).

[Comparative Example 1]

A thermoplastic resin composition consisting of homopolymer H7914 polymer resin of LG Chemical Co., Ltd., having a melt index (230 ° C) of 1400 g / 10 min, an ultraviolet stabilizer and an oxidative stabilizer, was fed into an extruder. The thermoplastic resin composition was kneaded, heated and compressed by rotating the extruder 80 times per minute. The kneaded composition was then spun radially and passed through an orifice to spin the fibers towards the collector. During this spinning, the fibers collide with the high-temperature and high-speed compressed air injected from the injection port provided symmetrically inside the spinning bed to form meltblown microfibers made of polypropylene having an average fiber thickness of 3 μm. The spinning meltblown microfine fibers were laminated to a collector, and the laminated fiber webs were wound on a winding machine, and a 15 g / m < 3 > nonwoven fabric was laminated on both sides to prepare curtains having a total weight of 600 g / m < 2 &

[Comparative Example 2]

A thermoplastic resin composition consisting of homopolymer H7914 polymer resin of LG Chemical Co., Ltd., having a melt index (230 ° C) of 1400 g / 10 min, an ultraviolet stabilizer and an oxidative stabilizer, was fed into an extruder. The thermoplastic resin composition was kneaded, heated and compressed by rotating the extruder 80 times per minute. The kneaded composition was then spun radially and passed through an orifice to spin the fibers towards the collector. During this spinning, the fibers collide with the high-temperature and high-speed compressed air injected from the injection port provided symmetrically inside the spinning bed to form meltblown microfibers made of polypropylene having an average fiber thickness of 3 μm. At this time, staple fibers (fineness of 5 denier) made of polyethylene material were fed to the meltblown microfibers through the fiber feeder provided at the lower side of the spinning bed to be mixed with the meltblown microfibers coming out of the orifices so as to have a weight ratio of 7: 3 . The air-blended fibers were laminated to a collector. The laminated fiber web was wound on a winder, and a 15 g / m < 3 > nonwoven fabric was laminated on both sides to prepare a curtain having a total weight of 600 g / m 2 and a thickness of 15 mm.

[Test result]

The pressure recovery rate, the aggregation strength, the sound absorption rate, the incombustibility, the heat resistance value and the electromagnetic wave absorption ability of the curtain re-samples of Examples 1 to 3 and Comparative Examples 1 and 2 were measured and the results are shown in the following Tables 1 to 5, respectively. Five samples of 100 mm x 100 mm square samples were taken at arbitrary positions of the sample, 150 g of a pressure plate having a size of 120 mm x 120 mm was pressurized to 0.1 kPa, Measure the thickness before compression of each sample. The compression of the sample is carried out by weighing 500 g and 40 pie on a steel plate of 100 mm × 100 mm × 0.8 mm, leaving it at 120 ± 2 ° C. for one hour and measuring the thickness after compression. After calculating the thickness before compression and the rate of change after compression, the average value is represented as a representative value. The aggregation strength was determined by extracting the fibrous web from each sample and pulling both surfaces of the fibrous web at a rate of 25 mm per minute according to GMW 14695 to determine the maximum load at which the aggregate was destroyed. The absorption coefficient was tested by reverberation method according to KS F 2805, and the sound absorption rate was measured. In the incombustible horizontal tunnel with length of 7.3m × width 0.056m × height 0.305m according to ASTM E84 (Method of Test of Surface Burning Characteristics), each sample installed on the ceiling of the tunnel had an output of 89kw In the state of being exposed to the flame of the gas burner ejected by the burner. The results of the carbonization area and the smoke generation test are shown in Table 4. In addition, the evaluation in Table 4 was evaluated according to the following criteria. In accordance with the provisions of the National Fire Protection Association Life Safety Code 101, Section 6-5.3, "Interior Wall and Ceiling Finish Classification" of the United States Fire Protection Association (NFPA). According to this standard, flammability is classified into the following A to C grades according to the flammability index (Flame Spread Index) and smoke generation test value (Smoke Development Value) obtained by the test according to ASTM E84.

* Class A: Carbonization area test index 0 ~ 25, smoke generation test value 0 ~ 450

* B grade: Carbonization area test index 26 ~ 75, smoke generation test value 0 ~ 450

* C rating: Carbonization area test index 76 ~ 200, smoke generation test value 0 ~ 450

The thermal resistance (clo) was measured according to KS K 0466.

The absorbance was measured by a network analyzer.

sample	Pressure Recovery Rate (%)	sample	Pressure Recovery Rate (%)
Inventory 1	77	Comparative Example 1	46
Inventory 2	75	Comparative Example 2	53
Inventory 3	73

sample	Aggregation strength (N / cm 2)	sample	Aggregation strength (N / cm 2)
Inventory 1	55	Comparative Example 1	43
Inventory 2	54	Comparative Example 2	48
Inventory 3	55

sample	Noise Reduction Factor (NRC)	sample	Noise Reduction Factor (NRC)
Inventory 1	0.37	Comparative Example 1	0.19
Inventory 2	0.38	Comparative Example 2	0.24
Inventory 3	0.40

sample	Carbonization Area Test Index	Smoke generation test value	Rating
Inventory 1	2	10	A
Inventory 2	3	12	A
Inventory 3	2	9	A
Comparative Example 1	98	103	C
Comparative Example 2	112	118	C

sample	Thermal resistance (clo)	sample	Thermal resistance (clo)
Inventory 1	6.123	Comparative Example 1	1.960
Inventory 2	6.155	Comparative Example 2	2.358
Inventory 3	6.148

sample	Electromagnetic wave absorption ability (dB, 10 GHz)	sample		Electromagnetic wave absorption ability (dB, 10 GHz)
Inventory 1	9.2	Comparative Example 1		0.4
Inventory 2	9.4	Comparative Example 2		0.6
Inventory 3	9.8

As shown in Tables 1 to 6, the curtain according to Inventive Examples 1 to 3 of the present invention showed an increase in pressure recovery rate and an excellent aggregation strength as compared with Comparative Examples 1 and 2, It was confirmed that the thermal resistance value was greatly improved. That is, the curtain material according to the present invention is characterized in that a large number of air layers and microfiber are entangled between the fibrous layers of the net structure to increase the aggregation strength, to crosslink the fibrous web, the carbon fiber felt to be made of ultra- The elasticity and the restoration ratio are increased, the number of fiber strands is increased in the same volume of the fiber web, the surface area is increased, and the adiabatic property, the sound absorption property and the sound insulation are improved due to the carbon fiber felt and the soundproof sheet. In addition, Inventive Examples 1 to 3 show almost no carbonization area and smoke generation due to the carbon fiber felt made of ultra-high-elasticity carbon fibers, while they correspond to Class A, whereas Comparative Examples 1 and 2 correspond to Class C there was. In Examples 1 to 3, the electromagnetic wave shielding sheet was formed to greatly increase the electromagnetic wave absorbing ability. Particularly in Inventive Example 3, a metal oxidation preventing sheet was provided, which did not appear numerically in the test results. However, So that the electromagnetic wave shielding efficiency can be maintained and the durability can be increased.

According to the present invention, an indoor soundproofing curtain excellent in heat insulation is light and excellent non-flammable, and does not burn or smoke. Because of excellent heat insulation property, it can enjoy a pleasant life at an optimal room temperature, increase building energy efficiency, It is possible to maintain a quiet and cozy indoor atmosphere as well as to provide an electromagnetic wave shielding function, a static electricity prevention, an excellent stretchability, an easy restoration, a good deformation and an excellent durability It is recognized.

Claims (6)

1. A fiber pad comprising a fibrous web comprising meltblown microfine fibers of a thermoplastic resin and a nonwoven fabric formed on both sides of the fibrous web; An electromagnetic wave shielding sheet attached to one surface of the fiber pad; A soundproof sheet made of a thermoplastic elastomer (TPE) bonded to the back surface of a fiber pad; An adhesive sheet formed on both sides of the soundproof sheet to bond the fiber pads and the carbon fiber felt together; And a carbon fiber felt bonded to the soundproof sheet through an adhesive sheet and entangled with the carbon fibers by needle punching to bind the plurality of carbon fiber fabrics, wherein the electromagnetic wave shielding sheet has an elongated hole formed therein, The hollow tube is formed by sequentially forming metal membranes made of metal on a polypropylene fiber and then heat the polypropylene fibers to melt the polypropylene fibers, Wherein the electromagnetic shielding sheet comprises 20 to 30 wt% of an EVA resin, 5 to 10 wt% of a silicone resin, 50 to 60 wt% of dimethylformamide, 5 to 10 wt% of a metal powder, 1 to 5 wt% 0.5 to 1.5% by weight of methyl methacrylate, and 0.5 to 1.5% by weight of acrylic emulsion resin.
2. A fiber pad comprising a fibrous web comprising meltblown microfine fibers of a thermoplastic resin and a nonwoven fabric formed on both sides of the fibrous web; An electromagnetic wave shielding sheet attached to one surface of the fiber pad; A soundproof sheet made of a thermoplastic elastomer (TPE) bonded to the back surface of a fiber pad; An adhesive sheet formed on both sides of the soundproof sheet to bond the fiber pads and the carbon fiber felt together; And a carbon fiber felt formed by bonding a plurality of carbon fiber fabrics together by entangling the carbon fibers by needle punching, wherein the soundproof sheet comprises 50 to 70 wt% of a polyolefin resin, EPM A rubber composition comprising 20 to 40% by weight of rubber, 0.5 to 2% by weight of carbonylbiscaprolactam, 1 to 5% by weight of tetrahydrofurfuryl methacrylate, 0.5 to 3% by weight of dipropylene glycol diacrylate, 1,6-hexanediol di 0.5 to 3% by weight of acrylonitrile, 0.5 to 3% by weight of N, N'-m-phenylene dimaleimide, 0.5 to 1.5% by weight of stannic chloride, 0.1 to 1.0 An interior sound-proofing curtain excellent in heat insulation including weight%.
3. A fibrous web comprising meltblown microfibers made of a thermoplastic resin and a nonwoven fibrous pad formed on both sides of the fibrous web; An electromagnetic wave shielding sheet attached to one surface of the fiber pad; A soundproof sheet made of a thermoplastic elastomer (TPE) bonded to the back surface of a fiber pad; An adhesive sheet applied on both sides of the soundproof sheet to bond the fiber pads and the carbon fiber felt together; And a carbon fiber felt adhered to the soundproof sheet by an adhesive sheet and entangled with the carbon fibers by needle punching to bind the plurality of carbon fiber fabrics, wherein the soundproof sheet has a surface coated with a coating layer containing the loess powder and the flame- Wherein the adhesive sheet comprises a silicate mixture, 5 to 10 parts by weight of a mineral fiber and 5 to 10 parts by weight of a curing agent per 100 parts by weight of the silicate mixture.
4. A fiber pad comprising a fibrous web comprising meltblown microfine fibers of a thermoplastic resin and a nonwoven fabric formed on both sides of the fibrous web; An electromagnetic wave shielding sheet attached to one surface of the fiber pad; A soundproof sheet made of a thermoplastic elastomer (TPE) bonded to the back surface of a fiber pad; An adhesive sheet formed on both sides of the soundproof sheet to bond the fiber pads and the carbon fiber felt together; And a carbon fiber felt adhered to the soundproof sheet through an adhesive sheet and entangled with the carbon fibers by needle punching to bind the plurality of carbon fiber fabrics, wherein the carbon fiber fabric comprises ultra high modulus type (UHM) carbon fibers Sound insulation curtains with excellent insulation.
5. A fiber pad comprising a fibrous web comprising meltblown microfine fibers of a thermoplastic resin and a nonwoven fabric formed on both sides of the fibrous web; An electromagnetic wave shielding sheet attached to one surface of the fiber pad; A soundproof sheet made of a thermoplastic elastomer (TPE) bonded to the back surface of a fiber pad; An adhesive sheet formed on both sides of the soundproof sheet to bond the fiber pads and the carbon fiber felt together; And a carbon fiber felt adhered to the soundproof sheet through the adhesive sheet and entangled with the carbon fibers by needle punching to bind the plurality of carbon fiber fabrics, wherein the carbon fibers interposed between the upper and lower carbon fiber fabrics of the carbon fiber felt Wherein the fiber fabric is formed by mixing carbon fibers and polypropylene fibers and then heat-treating the fibers to remove gaps between the carbon fibers while removing the polypropylene fibers.
6. A fiber pad comprising a fibrous web comprising meltblown microfine fibers of a thermoplastic resin and a nonwoven fabric formed on both sides of the fibrous web; An electromagnetic wave shielding sheet attached to one side of the fiber pad; A soundproof sheet made of a thermoplastic elastomer (TPE) bonded to the back surface of a fiber pad; An adhesive sheet formed on both sides of the soundproof sheet to bond the fiber pads and the carbon fiber felt together; And a carbon fiber felt bonded to the soundproof sheet by an adhesive sheet and entangled with the carbon fibers by needle punching to bind the plurality of carbon fiber fabrics, wherein the carbon fiber felt comprises a fiber pad, an electromagnetic wave shielding sheet and a fiber pad An interior soundproof curtain excellent in heat insulating property wherein a plurality of linear grooves spaced apart from each other along a longitudinal direction are formed in a soundproof sheet having an adhesive sheet on the back and bonded thereto by partial press bonding from both sides.

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