KR101780649B1 - Heat insulating pad having excellent effect for sound absorption and electromagnetic wave shield - Google Patents

Abstract

The present invention provides a heat insulation pad having excellent effects of absorbing sound and shielding electromagnetic wave, which comprises a meltblown fiber to have increased heat insulation property, and can be used in construction, an interior material of a car, and the like by having excellent effects of absorbing sound and shielding electromagnetic wave, wherein the heat insulation pad comprises: a fiber web layer comprising meltblown microfibers made of a thermoplastic resin; a nonwoven fabric sheet formed on both sides of the fibrous web layer; a glass fiber layer formed on one side of the nonwoven fabric sheet; a foil layer formed on the glass fiber layer and made of aluminum; and a thin film layer on which copper is deposited on the foil layer. According to the present invention, the thickness is greatly reduced, the weight is light, a heat insulating property and incombustibility are increased, the energy efficiency of a building and a vehicle is increased, excellent sound absorption and electromagnetic wave shielding performance can be obtained, and an electromagnetic wave shielding effect is greatly increased.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heat-insulating pad having excellent sound absorption and electromagnetic wave shielding effect,

More particularly, the present invention relates to a heat insulating pad including a meltblown fiber, which has an increased heat insulating property and an excellent sound absorbing property, and is excellent in electromagnetic wave shielding effect by including a metal layer, .

In recent years, noise pollution has become serious as the types of noise sources generated from the outside and inside of a building have become increasingly diverse. In the case of apartments such as apartment buildings, legal regulations for regulating the noise level between the interlayer and the generation are strengthened. Also, in the case of vehicles such as automobiles, trains, ships, and aircrafts, interior materials are constructed so that noises generated from external noises or engines can not reach inside. At the same time, efforts to increase the thermal insulation of buildings and vehicles have continued with rising energy costs.

Polypropylene fiber web is made by extruding polypropylene, which is a thermoplastic resin, in a downward direction on a filament to stretch the filaments into a wave shape by colliding with a filament at a high temperature and a high speed at a constant temperature, , And collecting and laminating the filaments formed with the wave to form a fibrous web.

The polypropylene fiber web produced by the meltblown method is safer and more environmentally friendly than glass fiber or goose down. It can be easily cut and used according to the purpose, and is not only recyclable but also has a very small diameter and a surface area Because it is very large, it is widely used for various high performance filters, wipers, oil adsorbents, sound absorbing materials, heat insulating materials, and interior padding for clothes.

However, the polypropylene fiber web has a weak strength of the microfibers constituting the fibrous web and weak cohesion between the microfibers. Therefore, when the fibrous web is used without being subjected to a separate processing step, the aggregation of the absorbent web is easily broken, And it is possible to increase the internal space by reducing the thickness of the construction compared to the felt, styrofoam, polyurethane foam, etc., which are traditionally used as building interior materials, and to satisfy predetermined sound insulation and heat insulation performance.

Patent Document 1 discloses a first meltblown nonwoven fabric layer having a mean diameter of 0.1 to 20 microns and a first meltblown nonwoven fabric layer having an average density of 50 kg / and kg / ㎥, and a basis weight of 50 kg / ㎡ ~ 4,000 g / ㎡, a melt blown nonwoven fabric under the measurement conditions of the wind speed 5.3 cm / sec, characterized in that the pressure loss is _{2 mmH 2 O ~ 10,000 mmH 2} O It is public.

Patent document 2 discloses a soundproof panel including an outer membrane and a plurality of cells formed therein, and a soundproof panel for absorbing and attenuating acoustic energy and a meltblown fiber.

However, the above-described Patent Documents 1 and 2 have a problem in that they can not satisfy both the heat insulating property, the sound absorbing property and the nonflammability required for the interior material, and can not block the harmful electromagnetic waves generated from the indoor and outdoor electronic devices.

Korean Patent Registration No. 10-0574764 (published on April 28, 2006) United States Patent No. 6,220,388 (published April 24, 2001)

SUMMARY OF THE INVENTION In view of the foregoing, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a sound absorbing and electromagnetic wave shielding device capable of significantly reducing thickness, lightweight and lightweight, It is an object of the present invention to provide a heat-insulating pad excellent in sound-absorbing and electromagnetic wave shielding effect with greatly increased blocking effect.

In order to solve the above-described problems, the present invention provides a fiber web comprising a meltblown microfiber made of a thermoplastic resin; A nonwoven fabric sheet formed on both sides of the fibrous web layer; A glass fiber layer formed on one side of the nonwoven fabric sheet; A foil layer formed on the glass fiber layer and made of aluminum; And a thin film layer on which copper is deposited on the foil layer, the insulating pad being excellent in sound absorption and electromagnetic wave shielding effect.

The fibrous web layer of the present invention may comprise 60 to 80% of meltblown microfine fibers in weight% and 20 to 40% in staple fibers.

Further, the meltblown microfine fibers of the present invention have an average diameter of 50 to 60% by weight of 1 to 3 占 퐉 and 20 to 30% of the average diameter of 0.3 to 1 占 퐉 (not including 1) , And 10 to 20% may be provided to have an average diameter of 0.1 to 0.3 mu m (not including 0.3).

Further, the staple fiber of the present invention may be composed of a composite hollow structure in which a polyester and a polypropylene are joined, extruded and stretched, and a hollow is formed therein.

Further, the staple fiber of the present invention is composed of a cross-section yarn composed of a polyester having a low melting point and a polyester having a high melting point, and can be deformed to have a spring shape by heat treatment.

Further, the present invention is characterized in that a barrier layer is formed between the foil layer and the thin film layer, wherein the barrier layer comprises a polyester resin, and a plurality of metal films laminated irregularly dispersed in the polyester resin, Wherein the metal material is formed by sequentially coating a plurality of fine metal films on a natural fiber or a synthetic fiber having a fine diameter and then removing the natural fiber or synthetic fiber through heat treatment to form a pinhole have.

In addition, the present invention may further comprise a zirconium oxide layer formed by depositing zirconium oxide on the thin film layer, and a silica layer formed by depositing silicon dioxide on the zirconium oxide layer.

Further, the fibrous web layer may be added with far-infrared radiation material.

According to the present invention, the thickness is drastically reduced, the weight is light, the heat insulating property and the nonflammability are increased, the energy efficiency of buildings and vehicles is increased, the sound absorbing and electromagnetic wave shielding performance is improved, .

1A and 1B are cross-sectional views of an insulating pad according to an embodiment of the present invention.
2 shows an apparatus for producing a fibrous web layer according to an embodiment of the present invention.
3 is a photograph showing meltblown microfibers.
FIG. 4A is a photograph of a structure of a fiber web layer according to an embodiment of the present invention, and FIG. 4B is a photograph of a section of a fiber web layer according to an embodiment of the present invention, taken by an electron microscope.
FIG. 5A is a photograph of a hollow staple fiber of a staple fiber according to an embodiment of the present invention taken by an electron microscope, FIG. 5B is a cross-sectional view of a staple fiber of a staple fiber according to an embodiment of the present invention taken by an electron microscope It is a photograph.
6A is an electron micrograph of the staple fiber before heat treatment according to an embodiment of the present invention, and FIG. 6B is an electron micrograph after heat treatment.
7 is a view showing a configuration of a fibrous web layer according to an embodiment of the present invention.
FIG. 8A is a view showing a barrier layer according to an embodiment of the present invention, and FIG. 8B is an electron micrograph of a metal material according to an embodiment of the present invention.
FIG. 9A is a photograph of a state in which a nonwoven fabric sheet is bonded to both sides of a fiber web layer, and FIG. 9B is a photograph of a state in which a foil layer of aluminum is attached on one side of a nonwoven fabric sheet.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, with reference to the drawings, detailed description will be made with reference to specific examples for carrying out an insulating pad having an excellent sound absorption and electromagnetic wave shielding effect according to the present invention.

The heat insulating pad (1) having excellent sound absorbing and electromagnetic wave shielding effect according to the present invention includes meltblown fibers and has an increased heat insulating property and an excellent sound absorbing property, and is excellent in electromagnetic wave shielding effect by including a metal layer, A nonwoven fabric sheet 20, a glass fiber layer 30, a foil layer 40, and a thin film layer 50, as shown in Fig. 1A.

The fibrous web layer 10 includes meltblown microfine fibers made of a thermoplastic resin and is manufactured by the fibrous web layer manufacturing apparatus 100 shown in Fig.

First, the thermoplastic resin is metered into the extruder 105, the additive is put into the kneader, the kneaded mixture is melted by the pressure applied by the heat, frictional heat and screw rotation applied through the thermal jacket and extruded into the string, And then passes through dozens of orifices 120 to emit the fibers toward the collector 160. At this time, the high-temperature and high-speed compressed air is injected from the nozzle 130 installed in the spinning band 110 to collide with the fibers and to be blown into the atmosphere through the orifice 120 to obtain meltblown microfibers 11 ) Can be formed.

A fiber feeder 140 for feeding fibers to one side of the lower part of the spinning platform 110 is provided and the fiber feeder 140 supplies staple fibers 12 to a position where the meltblowing microfibers 11 are radiated, The fibrous web 13 is formed.

Such air blending is made by mixing 60 to 80% of meltblown microfine fibers 11 by weight and 20 to 40% of staple fibers 12 by weight. As described above, when the staple fiber 12 is less than 20% in the absorbing web 13, the recovery rate against the pressing force may be lowered. When the staple fiber 12 in the fiber web 13 exceeds 40% ) 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 160 without passing through or in the form of a deforming device 150, and are continuously and horizontally and vertically stacked to form a composite fibrous web of tangled horizontal and vertical layers, The structure and cross-section of the fibrous web 13 are shown in Figs. 4A and 4B. Here, the collector 160 may be a rotating drum, a moving belt, or the like, and may control the rotation speed of the collector 160 to control the thickness of the fiber web 13. That is, if the rotating speed of the collector 160 is set to a low speed, the fibrous web 13 is formed thick, and if the rotating speed of the collector 160 is made high, the thickness of the fibrous web 13 becomes thin. The air-blended meltblown microfibers 11 and the staple fibers 12 collected on the collector 160 are joined together to form a fibrous web 13 while being cooled.

The meltblown microfibers 11 may be made of a thermoplastic resin such as polyethylene, polypropylene, polyester, polyamide, polycarbonate or the like and may contain additives such as a heat stabilizer, an antioxidant, a flame retardant, And may be provided so that a far-infrared ray emitting material such as ceramic particles is added to radiate a far-infrared ray which is beneficial to the human body.

The meltblown microfine fibers 11 are made of microfine fibers having an average diameter of 1 to 3 탆 in an amount of 50 to 60% by weight and an average diameter of 0.3 to 1 탆 (not including 1) of 20 to 30% , And 10 to 20% may be made of an ultrafine fiber having an average diameter of 0.1 to 0.3 탆 (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.

As shown in FIG. 5A, the staple fibers 12 may be composed of a composite core structure in which a polyester and a polypropylene are joined together, extruded and stretched, and a hollow is formed therein. Further, the staple fiber 12 preferably has a fineness of 4 to 6 denier and exhibits a curled shape through a force between molecules according to two kinds of constituent materials. Since the hollow is formed inside the staple fiber 12, the density is high, The function is improved, the recovery rate is increased, and the absorptiveness can be increased.

5B, the staple fiber 12 is composed of a polyester cross-section yarn composed of a polyester 12a having a low melting point and a polyester 12b having a high melting point and having different melting points The cross-section of the fiber is divided into polyester.

The polyester 12b having a low melting point has a melting point of about 200 to 210 DEG C and the polyester 12b having a high melting point has a melting point of about 250 to 260 DEG C. In the heat- The polyester 12a having a low melting point is melted while being melted while the polyester 12b having a high melting point is not shrunk or melted so that the polyester 12a having a low melting point is melted, Since the fibers are crosslinked by the melting of the fibers, the binder does not need to be used and the flow of the layers is prevented. As shown in Figs. 6A and 6B, The cushioning function is improved, and the heat insulating property and the absorptiveness are increased. 7 shows a fiber web 10 in which the meltblown micro-fibers 11 and the staple fibers 12 are blended as described above.

The nonwoven fabric sheet 20 is formed on both sides of the fibrous web layer 10 to protect the fibrous web layer 10 from the outside and includes 30 to 40% by weight of cotton, 30 to 40% of cellulose, 20 to 30% Wherein the fibers are arranged in a parallel or negative direction to form a thin felt web.

The absorbent web layer 10 may be formed in an in-line manner in which a nonwoven fabric sheet 20 unwound by another feeding device is bonded and then passed through a calender roll to complete interlayer adhesion, It is more preferable to increase the working efficiency because there is no damage to the fabric due to the absence of wrinkles or wrinkles and the quick adhesion is possible.

The glass fiber layer 30 is laminated on one side of the nonwoven fabric sheet to provide insulation and absorptivity as well as nonflammability.

In general, the vibration of an electromagnetic wave electromagnetic field propagates to a wavelength, that is, a periodic change of an electric field and a magnetic field is transmitted as a wave, and an electric field and a magnetic field coexist with each other.

The foil layer 40 is made of aluminum and laminated on the glass fiber layer to reinforce the surface, provide a thermal insulation and electromagnetic shielding effect, and provide a smooth deposition surface on which a thin film layer to be described below can be deposited.

The thin film layer 50 is formed by depositing copper on the foil layer 40 to provide an electromagnetic wave shielding effect.

Referring to FIG. 1B, a blocking layer 60 is formed between the foil layer 40 and the thin film layer 50 to block electromagnetic waves.

8A and 8B, the blocking layer 60 includes a polyester resin 61 and a pinhole 62a dispersed irregularly in the polyester resin 61, And a plurality of metal films 62b having a plurality of metal layers 62b.

The metal material 62 is formed by applying a plurality of metal films 62b selected from conductive metals such as nickel, tin, cobalt and silver to a natural fiber or synthetic fiber having a fine diameter of 2.6 to 5 탆, And then heat treatment is performed at a temperature of 650 to 750 ° C in an inert gas atmosphere to selectively remove natural fibers or synthetic fibers to form a pinhole 62a so that a rod-like hollow fiber capable of absorbing electromagnetic waves . The diameter of the natural fiber or synthetic fiber of 2.6 to 5 탆 is considered to be light weight and the thickness of the thin film, and the thickness of the metallic material covering 2.6 to 5 탆 takes into account the strength and the shape retention of the rod-like hollow fiber.

At this time, the coating of the metal film 62b is performed by depositing natural fibers or synthetic fibers in the plating solution at a temperature range of 70 to 80 캜 for about 1 hour to have a thickness of 2.6 to 5 탆.

In addition, the heat treatment may be performed by charging the natural material 62 or the metal material 62b coated with the metal material 62b into the heat treatment apparatus and heat-treating the natural material 62 or the synthetic fiber 62 for a period of 1 to 2 hours at a temperature of 650 to 750 ° C, The pinhole 62a is formed by burning and removing the fiber, whereby the metal material 62 is produced.

By forming the barrier layer 60 by uniformly dispersing the metal material 62 thus produced in a binder made of the polyester resin 61 and continuously forming the thin film layer 50 in which copper is deposited thereon, I will have it.

1B, a zirconium oxide layer 70 formed by depositing zirconium oxide on the thin film layer 50, a silica layer 80 formed by depositing silicon dioxide on the zirconium oxide layer 70, And the zirconium oxide layer 70 and the silica layer 80 have a transparent property.

The zirconium oxide layer 70 has a high corrosion resistance and a very high melting point of 2,677 DEG C and a low coefficient of thermal expansion so that the durability of the heat insulating pad 1 is increased due to the excellent fire resistance and the zirconium oxide has an electromagnetic wave shielding effect And the electromagnetic wave blocking rate is also increased.

In addition, since the silica layer 80 has a small coefficient of thermal expansion, it can withstand high temperatures, has excellent fire resistance, and is waterproof, thereby increasing the durability and waterproofness of the heat-insulating pad 1. In addition, silicon dioxide has an electromagnetic- .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the heat-insulating pad 1 having a sound-absorbing and electromagnetic wave shielding effect according to the present invention will be described in detail.

[Description 1]

The fibrous web layer 10 was produced by the fibrous web layer producing apparatus 100 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 layer having a weight of 600 g / m < 2 > was prepared and wound into a winding machine.

After a nonwoven fabric sheet was bonded to both surfaces of the fiber web layer by ultrasonic bonding, a 1 mm-thick glass fiber layer sheet was laminated on one nonwoven fabric sheet, and then a foil layer having a thickness of 10 탆 made of aluminum was laminated on the glass fiber layer And copper was deposited on the foil layer to a thickness of 10 mu m to form a thin film layer, thereby manufacturing a heat-insulating pad having a thickness of 60 mm.

[Advantage 2]

55 wt% had an average diameter of 2 mu m, 27 wt% had an average diameter of 0.5 mu m, and 18 wt% had an average diameter of 0.2 mu m Meltblown microfine fiber made of polypropylene was formed. The remaining constitution and conditions were the same as those in Example 1 to prepare a heat-insulating pad having a thickness of 60 mm.

[Practical Example 3]

The composite hollow structure (fineness of 5 denier), which is formed by joining polyester and polypropylene, extruding and stretching, and forming a hollow in the inside, is formed by spinning a meltblown microfiber using a fiber feeder And a meltblown microfine yarn coming out of the orifice was mixed with the mixture at a weight ratio of 3: 7. The remaining constitution and conditions were the same as those in Example 1 to prepare a heat-insulating pad having a thickness of 60 mm.

[Description 4]

In the heat treatment machine, polyester having a low melting point of 210 ° C and polyester having a high melting point of 260 ° C were thermally treated at 210 ° C to melt the polyester having a low melting point to crosslink the fibers, The cross-section of the cross-section of the composite component was prepared, and meltblown microfine yarns were fed to the spinning position to mix the meltblown microfibers coming from the orifice with a weight ratio of 3: 7. The remaining components and conditions were the same as in Example 1 A heat insulating pad having a thickness of 60 mm was prepared.

[State of the Art 5]

A heat insulating pad having a thickness of 60 mm was produced under the same constitution and conditions as in Example 1, except that a barrier layer was formed between the foil layer and the thin film layer. The barrier layer coats a composition comprising a polyester resin, a dispersant and a metallic material on the foil layer.

That is, through the electroless plating, polyester fibers having a fine average diameter of 3 mu m were immersed in a plating solution at a temperature of 75 DEG C for about one hour to sequentially coat nickel and cobalt to a thickness of 3 mu m, Treated at 700 ° C for about 1 hour in an inert gas atmosphere to selectively remove the polyester fiber to form a pinhole, thereby forming a metal material having a shape of a rod-like hollow fiber. Then, a composition obtained by mixing the metal material, the polyester resin and the dispersing agent thus prepared was coated on the foil layer, and copper was deposited thereon to a thickness of 10 탆 to form a thin film layer, thereby manufacturing a heat insulating pad having a thickness of 60 mm.

[Description 6]

A thermal insulation pad having a thickness of 60 mm was manufactured under the same constitution and conditions as those of Example 5 except that a zirconium oxide layer was further deposited on the thin film layer of Example 5 to a thickness of 2 탆 to form a silicon dioxide Was deposited to a thickness of 2 [micro] m to form a silica layer.

That is, a heat insulating pad formed up to the thin film layer is charged and fixed in a vacuum chamber, and the vacuum degree is evacuated to 2 × 10 -3 Torr. Then, a power source of 3 kw is applied to the evaporation source to evaporate the zirconium oxide, To be deposited on the insulating pad. Then, silicon dioxide was deposited on the zirconium oxide layer to a thickness of 2 mu m by the same method, and then the insulating pad was drawn out in a vacuum chamber.

[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 spun meltblown microfine fibers were laminated on a collector, and the laminated fiber webs were wound on a winding machine, and then a nonwoven fabric of 15 g / m 3 was laminated on both sides to prepare an insulating pad having a total weight of 600 g / m 2 and a thickness of 60 mm.

[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 the collector. The laminated fiber webs were wound on a winder, and a 15 g / m < 3 > nonwoven fabric was laminated on both sides to prepare an insulating pad having a total weight of 600 g / m 2 and a thickness of 60 mm.

[Example]

The pressure recovery rate, the aggregation strength, the sound absorption rate, the heat resistance value and the electromagnetic wave absorbing ability of the heat insulating pad samples of Examples 1 to 4 and Comparative Examples 1 and 2 were measured and the results are shown in the following Tables 1 to 5, respectively.

5 pieces of square samples of 100 mm x 100 mm were taken from an arbitrary position of the insulating pad sample, 150 g of a pressure plate having a size of 120 mm x 120 mm was pressurized to 0.1 kPa, To 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 measured by extracting the fiber web layer from each sample and pulling both surfaces of the fiber web at a rate of 25 mm per minute according to GMW 14695 to determine the maximum load at which the aggregation was broken.

The absorption coefficient was tested by reverberation method according to KS F 2805, and the sound absorption rate was measured.

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

The absorbance was measured by a network analyzer.

[Table 1] Pressure Recovery Rate

[Table 2] Roundup strength

[Table 3] Sound absorption rate

[Table 4] Thermal resistance value

[Table 5] Electromagnetic wave absorption ability

As shown in the above Tables 1 to 4, as a result of the test, the heat insulation pad according to Inventive Examples 1 to 6 of the present invention had an increased pressure recovery rate and an excellent aggregation strength as compared with Comparative Examples 1 and 2, And the thermal resistance value were greatly improved.

That is, since the heat insulating pad according to the present invention has many air layers and microfibers intertwined between the fibrous layers of the net structure, the aggregation strength is increased and the fibers are crosslinked to increase the elasticity and the restoration ratio while maintaining the basic properties of the fibrous web. The number of fiber strands increases in the volume and the surface area increases, so that the heat insulating property and the sound absorbing property can be greatly improved.

In Examples 1 to 4, a foil layer made of aluminum and a thin-film layer deposited with copper were provided to increase the electromagnetic wave absorbing ability. In Example 5, the barrier hollow metal material 62 was uniformly dispersed in the polyester resin And the inventive Example 6 further forms a zirconium oxide layer and a silica layer to exhibit a very excellent electromagnetic wave shielding ratio.

As a result, the heat-insulating pad 1 having an excellent sound absorption and electromagnetic wave shielding effect according to the present invention is greatly reduced in thickness, light in weight and lightweight, increased in heat insulation and incombustibility, increased in energy efficiency of buildings and vehicles, Sound absorption and electromagnetic wave shielding performance, and the electromagnetic wave shielding effect is greatly increased.

The present invention is not limited to the above-described embodiments. Anything having substantially the same constitution as the technical idea described in the claims of the present invention and achieving the same operational effect is included in the technical scope of the present invention.

1. Insulation pad 10. Fiber web layer
11. Meltblown microfiber 12. Staple fiber
12a. Polyester with low melting point
12b. Polyester with high melting point
13. Textile web 20. Nonwoven sheet
30. Glass fiber layer 40. Foil layer
50. Thin film layer 60. Intercept layer
61. Polyester resin 62. Metallic material
62a. Pinhole 62b. Metal film
70. Zirconium oxide layer 80. Silica layer
100. Fiber web layer production apparatus 105. Extruder
110. Radiation band 120. Orifice
130. Nozzle 140. Fiber feeder
150. Deformation device 160. Collector

Claims (8)

delete delete A fibrous web layer comprising meltblown microfibers made of a thermoplastic resin; A nonwoven fabric sheet formed on both sides of the fibrous web layer; A glass fiber layer formed on one side of the nonwoven fabric sheet; A foil layer formed on the glass fiber layer and made of aluminum; And a thin film layer on which copper is deposited on the foil layer,
Wherein the fiber web layer comprises 60 to 80% of meltblown microfine fibers in weight% and 20 to 40% in staple fibers,
Wherein the meltblown microfine fibers have an average diameter of 50 to 60% by weight, an average diameter of 1 to 3 占 퐉, 20 to 30% have an average diameter of 0.3 to 1 占 퐉 (not including 1) % Has an average diameter of 0.1 to 0.3 탆 (not including 0.3), and is excellent in sound absorption and electromagnetic wave shielding effect.
The method of claim 3,
Wherein the staple fiber is made of a composite hollow structure in which a polyester and a polypropylene are joined to each other and extruded and stretched and a hollow is formed in the hollow fiber.
delete A fibrous web layer comprising meltblown microfibers made of a thermoplastic resin; A nonwoven fabric sheet formed on both sides of the fibrous web layer; A glass fiber layer formed on one side of the nonwoven fabric sheet; A foil layer formed on the glass fiber layer and made of aluminum; And a thin film layer on which copper is deposited on the foil layer,
A barrier layer is formed between the foil layer and the thin film layer,
Wherein the barrier layer comprises a polyester resin and a linear metal material which is irregularly dispersed in the polyester resin and has a pinhole formed therein and a plurality of metal films stacked on one another and the metal material is a natural fiber having a fine diameter or Characterized in that the synthetic fibers are sequentially coated with a plurality of fine metal films and then the natural fibers or synthetic fibers are removed through heat treatment to form pinholes.
A fibrous web layer comprising meltblown microfibers made of a thermoplastic resin; A nonwoven fabric sheet formed on both sides of the fibrous web layer; A glass fiber layer formed on one side of the nonwoven fabric sheet; A foil layer formed on the glass fiber layer and made of aluminum; And a thin film layer on which copper is deposited on the foil layer,
And a silica layer formed by depositing silicon dioxide on the zirconium oxide layer, wherein the zirconium oxide layer is formed by depositing zirconium oxide on the thin film layer, and the silica layer is formed by depositing silicon dioxide on the zirconium oxide layer.
The method according to any one of claims 3, 4, 6, and 7,
Wherein the fibrous web layer has a far-infrared radiation material added thereto.

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