WO2006052055A1

WO2006052055A1 - Noise-proof element and method of preventing interfloor noise using it

Info

Publication number: WO2006052055A1
Application number: PCT/KR2005/001624
Authority: WO
Inventors: Moon-Su Lee
Original assignee: Wookyung Industrial Co., Ltd
Priority date: 2004-11-15
Filing date: 2005-05-31
Publication date: 2006-05-18

Abstract

A noise-proof element for preventing noise from being transmitted from the floor and interlayer of a building, which can block or absorb noise and shield static electricity, electromagnetic waves and water vein waves without deformation caused by changes in temperature, and a method of preventing interlayer noise using the same. The noise-proof element (10) of the current invention includes an upper plate (12); a supporting part (14) for supporting the upper plate (12); filling means (15) charged in the supporting part (14), and further includes noise-proof means (16) formed of rubber and provided on the lower surface of the supporting part (14). The supporting part (14) has a plurality of supporting legs, among which the supporting legs for supporting both sides of the upper plate (12) are longer than the other supporting legs. The upper plate (12) further includes elongated slits (18) to prevent deformation of the upper plate due to expansion and contraction of the upper plate caused by changes in temperature. According to the current invention, first, the noise-proof element may function to effectively prevent noise from being transmitted from the floor and interlayer of a building and to prevent moisture from condensing on the floor. Second, deformation of the noise-proof element due to expansion and contraction thereof caused by changes in temperature may be prevented. Third, electromagnetic waves and water vein waves may be shielded from being transmitted from the interlayer of a building.

Description

NOISE-PROOF ELEMENT AND METHOD OF PREVENTING INTERFLOOR NOISE USING IT

Technical Field

[1] The present invention relates to a noise-proof element for preventing noise from being transmitted from the floor and interlayer of a building, which can block or absorb noise and shield static electricity, electromagnetic waves, and water vein waves, without deformation caused by changes in temperature, and to a method of preventing interlayer noise using the same.

[2]

Background Art

[3] Typically, a sponge or rubber mat having sound absorption properties has been provided to the interlayer of a building in order to prevent noise from being transmitted from the floor and interlayer of a building.

[4] However, in the case where heavy concrete is laminated on the sponge or rubber mat, the material of sponge or rubber mat may be deformed. Further, the surface of the building may be irregular and cracked. Moreover, the sponge or rubber layer may be undesirably formed to be thick.

[5] In addition, even though noise and vibration are prevented from being transmitted from the interlayer of a building using a conventional process, electromagnetic waves and water vein waves, which are regarded as problematic in modern society, are difficult to efficiently shield.

[6]

Disclosure of Invention Technical Problem

[7] Accordingly, the present invention has been made keeping in mind the above problems encountered in the prior art, and an object of the present invention is to provide a noise-proof element, which can function to provide heat insulation and ef¬ ficiently prevent noise and vibration from being transmitted from the floor and interlayer of a building, and a method of preventing interlayer noise using the noise¬ proof element.

[8] Another object of the present invention is to provide a noise-proof element, which does not experience deformation caused by changes in temperature, and a method of preventing interlayer noise using the noise-proof element.

[9] A further object of the present invention is to provide a noise-proof element, which is capable of shielding static electricity, electromagnetic waves and water vein waves from being transmitted from the interlayer of a building, and a method of preventing interlayer noise using the noise-proof element. [10]

Technical Solution

[11] In order to accomplish the above objects, the present invention provides a noise¬ proof element, comprising an upper plate; and a supporting part for supporting the upper plate. [12] In addition, a noise-proof element of the present invention may comprise an upper plate; a supporting part for supporting the upper plate; and filling means charged in the supporting part; and noise-proof means made of rubber and attached to the lower surface of the support part. [13] The noise-proof element of the present invention is characterized in that the filling means is selected from the group consisting of styrofoam, waste tire rubber, EVA,

NBR, PE, PVC foam, and PU. [14] The noise-proof element of the present invention is characterized in that the supporting part comprises a plurality of supporting legs, among which the supporting legs for supporting both sides of the upper plate are longer than the other supporting legs. [15] The noise-proof element of the present invention is characterized in that the upper plate further comprises an elongated slit as deformation prevention means for preventing deformation of the upper plate due to expansion and contraction of the upper plate caused by changes in temperature. [16] The noise-proof element of the present invention is characterized by further comprising a conductive layer, which is a carbon sheet or metal coating sheet, on the upper plate to shield static electricity and water vein waves from being transmitted from the interlayer of a building. [17] The noise-proof element of the present invention is characterized in that the lower surface and/or upper surface of the filling means are provided with a metal member selected from the group consisting of nickel, copper, silver, potassium, magnesium, cadmium, and aluminum. [18] The noise-proof element of the present invention is characterized by further comprising a spacing part between the upper plate and the filling means to absorb noise. [19] The noise-proof element of the present invention is characterized in that the spacing part further includes a nonwoven vibration isolation member composed of a nonwoven fabric sound absorption layer and nylon filaments sewn on one surface of the nonwoven fabric sound absorption layer. [20] The noise-proof element of the present invention is characterized in that the upper plate and the supporting part are formed by foaming PVC further including wood powder and mineral powder, in which the synthetic resin is used in an amount of 55-60 wt%, the wood powder is used in an amount of 25-30 wt%, and the mineral powder is used in an amount of 10-15 wt%.

[21] The noise-proof element of the present invention is characterized in that the upper plate and the supporting part are formed by foaming PP (polypropylene) further including wood powder, in which 50-70 wt% wood powder is contained in the PP.

[22] The noise-proof element of the present invention is characterized in that the upper plate and the supporting part comprise a synthetic resin and an incombustible material, such as meteorite or vermiculite, in which the synthetic resin is used in an amount of 60-70 wt% and the meteorite or vermiculite is used in an amount of 30-40 wt%.

[23] The noise-proof element of the present invention is characterized in that a floor material, on which a nonwoven vibration isolation member composed of a nonwoven fabric sound absorption layer and nylon filaments sewn on one surface of the nonwoven fabric sound absorption layer is fused, is attached to the upper surface of the upper plate.

[24] The noise-proof element of the present invention is characterized in that a lateral spacing portion is formed at a side surface of the supporting part to minimize a contact area between the noise-proof element and floor.

[25] Further, the present invention provides a method of preventing interlayer noise, comprising providing a slab; laminating a vibration isolation panel on the slab to prevent noise and vibration from being transmitted from the interlayer of a building; and laminating an upper layer on the vibration isolation panel, in which the vibration isolation panel comprises the noise-proof element of the present invention.

[26]

Advantageous Effects

[27] According to the present invention, first, a noise-proof element may function to exhibit heat insulation, not externally transferring heat occurring in the floor and interlayer of a building, to effectively prevent noise from being transmitted from the floor and interlayer of a building, and to prevent moisture from condensing on the floor.

[28] Second, deformation of the noise-proof element due to expansion and contraction caused by changes in temperature may be prevented.

[29] Third, static electricity and water vein waves may be shielded from being transmitted from the interlayer of a building.

[30] Fourth, wood powder and mineral powder are further added to the upper plate and the supporting part of the noise-proof element, whereby contraction of the access floor is prevented thanks to the addition of the wood powder and about 30% of VOC (Volatile Organic Compound) gases may be reduced by virtue of the addition of mineral powder.

[31] Fifth, upon a fire occurring in the building, since the upper plate and supporting part are formed of incombustible material, the intrusion of flame is prevented and threats to life are minimized. Further, fire may be initially suppressed, and thus human and economic damages may be minimized. Furthermore, the building material is formed of mica that is expanded 10 times or more upon heating and thus may be easily handled, therefore greatly improving workability and construction characteristics.

[32]

Brief Description of the Drawings

[33] FIG. 1 is a perspective view showing a noise-proof element according to a first embodiment of the present invention;

[34] FIG. 2 is a perspective view showing a noise-proof element according to a second embodiment of the present invention; and

[35] FIG. 3 is a cross-sectional view showing a process of preventing interlayer noise using the noise-proof element of the present invention.

[36] <Description of the Reference Numerals in the Drawings>

[37] 10: noise-proof element 12: upper plate

[38] 14: supporting part 14a: supporting leg

[39] 15: filling means 16: noise-proof means

[40] 18: slit 20: conductive layer

[41] 30: slab 40: metal member

[42] 50: spacing part

[43]

Best Mode for Carrying Out the Invention

[44] Hereinafter, a detailed description will be given of the present invention with reference to the appended drawings.

[45] FIG. 1 shows a noise-proof element according to a first embodiment of the present invention, comprising a rectangular upper plate 12; elongated slits 18 provided at the upper plate 12; a supporting part 14 consisting of supporting legs 14a for supporting the upper plate 12; noise-proof means 16 attached to the lower surface of the supporting part 14; and filling means 15 charged between the supporting legs 14a.

[46] The upper plate 12 is formed of PVC. Since the upper plate 12 and the supporting part 14 may be produced in an extrusion or injection manner using a mold, the upper plate and the supporting part may be integrally formed. [47] The supporting part 14 functions to support the upper plate 12 and includes three supporting legs and the noise-proof means 16 made of rubber attached to the lower surface of the supporting leg. The lower surface of the noise-proof means 16 is formed with a plurality of elongated recesses so as not to slip from the floor.

[48] Among the three supporting legs 14a constituting the supporting part 14, two supporting legs for supporting both sides of the upper plate 12 are preferably structured to be longer than the other supporting leg for supporting the middle portion of the upper plate. The reason is that both supporting legs function to support the upper plate 12 when impact is not applied to the upper plate 12. Further, in the case where impact is applied to the upper plate 12 and thus both the supporting legs do not endure the applied impact, the upper plate 12 is bent downwards. In this way, when the upper plate 12 is bent downwards, the supporting leg provided at the middle portion of the upper plate 12 comes into contact with the floor to absorb a predetermined amount of impact.

[49] Hence, after the supporting legs of the supporting part provided at both the sides of the upper plate primarily absorb impact, impact which is not absorbed by the supporting legs of the supporting part provided at both the sides of the upper plate is secondarily absorbed by the supporting leg provided at the middle portion of the upper plate. Thereby, impact applied to the upper plate may be efficiently diffused.

[50] The elongated slits 18 provided at the upper plate 12 function to prevent the de¬ formation of the upper plate caused by changes in temperature so as not to negatively affect tile or finishing material laminated on the upper plate 12. When the noise-proof element 10 needs to be cut into a predetermined size, a cutting process may be easily conducted.

[51] In addition, the filling means 15 is preferably charged between the supporting legs

14a of the supporting part. Such filling means 15 is selected from the group consisting of styrofoam, waste tire rubber, EVA, NBR, PE, PVC foam, PU, and mixtures thereof.

[52] In the present invention, techniques for charging the filling means 15 between the supporting legs 14a include, for example, a process of mixing a filling material with a foaming agent to foam a mixture and a process of cutting styrofoam to correspond to the size of the supporting leg and bonding the cut styrofoam to a desired portion using an adhesive.

[53] The filling means 15 charged between the supporting legs 14a of the supporting part

14 functions to exhibit heat insulation so as not to transfer heat occurring from the floor or interlayer of a building to the outside, to prevent noise from being transmitted from the floor or interlayer, and to block moisture accumulation from the floor or interlayer.

[54] Further, it is preferred that a conductive layer 20 be additionally attached to the upper surface of the upper plate so as to shield static electricity, electromagnetic waves and water vein waves from being transmitted from the interlayer of a building.

[55] The conductive layer 20 may be formed using a material obtained by mixing any one among carbon coating, nickel, copper, silver, potassium, magnesium, cadmium and aluminum, 20-30 wt% of metal powder selected from the group consisting of nickel, copper, silver, potassium, magnesium, cadmium and aluminum, and 70-80 wt% of carbon powder.

[56]

Mode for the Invention

[57] A better understanding of the present invention may be obtained in light of the following examples which are set forth to illustrate, but are not to be construed to limit the present invention.

[58] Example 1

[59] As a conductive layer 20, a carbon coating film, obtained by applying carbon on synthetic resin or mixing synthetic resin with carbon and hot pressing the resulting product, was applied on a surface of an upper plate.

[60] Surface resistance of the upper plate 12 was measured to be 10 -10 Ω/D. Thereby, antistatic effects could be confirmed.

[61]

[62] Example 2

[63] As a conductive layer 20, any one selected from the group consisting of nickel, copper, silver, potassium, magnesium, cadmium and aluminum was formed into a sheet, which was then applied on the upper plate. The surface resistance of the upper plate was found to be 10 -10 Ω/D. Thereby, antistatic effects could be confirmed, and as well the following electromagnetic shielding effects were found to be manifested.

[64] That is, the electromagnetic waves shielded by the upper plate 12 were measured.

For measurement, according to ASTM D4935-89, the decibel level (A) was analyzed to be 8+05 dB. The decibel level (A) was substituted into an equation for calculating the electromagnetic shielding effect (shielding effect (%) = (1-10 ) x 100%), thus 82.21-85.87% of electromagnetic waves could be confirmed to have been shielded.

[65]

[66] Example 3

[67] As a conductive layer 20, 20-30 wt% of metal powder selected from the group consisting of nickel, copper, silver, potassium, magnesium, cadmium and aluminum were mixed with 70-80 wt% of carbon powder to made a sheet, which was then applied on the access floor. As the result, surface resistance was 10 -10 Ω/D, from which antistatic effects could be confirmed. [68] In addition, the electromagnetic shielding effects were measured according to

ASTM D4935-89 as in Example 2, whereby 60-65% of electromagnetic waves could be confirmed to have been shielded.

[69] Further, water vein waves, which are regarded as problematic in modern society, could be confirmed to have been shielded. The water vein waves are harmful waves emanating from 100-200 m below the earth's surface. When useful waves are applied to a position from where the harmful waves emanate, the harmful waves may be naturally powerlessly neutralized. However, scientific equipment for measuring water vein waves has not yet been introduced, and measurement is conducted using only an L-rod or pendulum, depending on the sensitivity of humans. Thus, whether water vein waves are being shielded is measured using a far infrared emission test or thermal imaging system. According to an FT-IR spectrometer process based on an assumption that emissivity of a theoretical sample such as a black body which is not actually present is determined to 1, far infrared emissivity of the access floor for shielding elec¬ tromagnetic waves and water vein waves was measured to be 0.68, that is, 68%. Further, 250 W of emission energy was produced, thus neutralizing water vein waves. The access floor for shielding electromagnetic waves or water vein waves according to the present invention was subjected to a thermal imaging test. As the result, since far infrared light at 3O⁰C was emitted at room temperature of 26⁰C, water vein waves were confirmed to be neutralized.

[70]

[71] Example 4

[72] The upper plate and supporting part were prepared by foaming a PVC mixture comprising PVC, wood powder and mineral powder, in which 60 wt% of synthetic resin, 30 wt% of wood powder and 10 wt% of mineral powder were preferably used. The results of the upper plate and supporting part thus prepared are as follows.

[73] That is, the surface of the access floor was prevented from contracting by virtue of the addition of the wood powder, and about 30% of VOC gases were reduced thanks to the addition of the mineral powder.

[74] In the case where the upper plate and the supporting part were formed of PP

(polypropylene), the PP was further mixed with wood powder and then foamed. If the wood powder was added to the PP in an amount of 51 wt%, about 30% of the VOC gases were confirmed to be reduced.

[75] On the other hand, FIG. 2 illustrates a noise-proof element according to a second embodiment of the present invention. Descriptions of the same content as the first embodiment are omitted, and the different contents are specifically explained below.

[76] As shown in FIG. 2, to the lower surface of filling means 15 is attached a metal member selected from the group consisting of nickel, copper, silver, potassium, magnesium, cadmium, and aluminum. When the metal member 40 is attached to the lower surface of the filling means 15 using an adhesive, static electricity and elec¬ tromagnetic waves may be shielded from being transmitted from the lower portion. In addition, a heat- insulation function for prevention of heat exchange with the lower portion may be exhibited, and moisture may be inhibited from absorption by the filling means.

[77] Although the metal member is attached only to the lower surface of the filling means 15 in the present invention, the metal member may be attached to the upper surface of the filling means or upper or lower surface of the filling means.

[78] In addition, predetermined spacing parts 50 are preferably formed between the upper plate 12 and the filling means 15 so as to absorb predetermined amounts of noise and vibration occurring in the upper portion and lower portion of the noise-proof element. Although not shown in this drawing, a nonwoven vibration isolation member composed of a nonwoven fabric sound absorption layer and nylon filaments sewn on one surface of the nonwoven fabric sound absorption layer may be preferably inserted into the spacing part 50. The vibration isolation member functions to absorb noise transferred to the spacing part from the upper surface of the noise-proof element.

[79] A floor material (not shown), on which a nonwoven vibration isolation member composed of a nonwoven fabric sound absorption layer and nylon filaments sewn on one surface of the nonwoven fabric sound absorption layer is fused, is preferably attached to the upper surface of the upper plate. In this way, the floor material having the fused vibration isolation member is attached to the upper surface of the upper plate, thereby exhibiting a cushioning effect for the noise-proof element as well as absorbing noise. In order to minimize the contact area between the noise-proof element 10 and the floor surface, lateral spacing portions 19 are preferably formed at the side surface of the supporting part 14 of the noise-proof element.

[80] Turning now to FIG. 3, a method of preventing interlayer noise using the nois e- proof element of the present invention is illustrated, the method comprising providing a slab 30; laminating a noise-proof element 10 for preventing noise and vibration from being transmitted from the interlayer of a building on the slab 30; and laminating an upper layer 40 on the noise-proof element 10.

[81] The lamination of the upper layer 40 includes laminating a thin vinyl layer 42 on the noise-proof element to block the elongated slits of the upper plate and gaps formed between the noise-proof elements where a plurality of noise-proof elements is used, laminating a 60 mm thick lightweight concrete layer 44 on the vinyl layer 42, and then laminating a 20-25 mm thick plaster layer 46 on the concrete layer.

[82] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modi- fications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

[ 1 ] A noise-proof element, comprising: an upper plate; and a supporting part for supporting the upper plate.

[2] The noise-proof element according to claim 1, further comprising filling means charged in the supporting part.

[3] The noise-proof element according to claim 1 or 2, further comprising noise¬ proof means formed of rubber and provided at a lower surface of the supporting part.

[4] The noise-proof element according to claim 1 or 2, wherein the supporting part comprises a plurality of supporting legs, among which the supporting legs for supporting both sides of the upper plate are longer than the other supporting legs.

[5] The noise-proof element according to claim 1 or 2, wherein the upper plate further comprises deformation prevention means for preventing deformation of the upper plate due to expansion and contraction of the upper plate caused by changes in temperature.

[6] The noise-proof element according to claim 5, wherein the deformation prevention means is an elongated slit.

[7] The noise-proof element according to claim 1 or 2, further comprising a conductive layer on the upper plate to shield static electricity and water vein waves from being transmitted from an interlayer of a building.

[8] The noise-proof element according to claim 7, wherein the conductive layer is a carbon sheet or a metal coating sheet.

[9] The noise-proof element according to claim 2, wherein the filling means is selected from the group consisting of styrofoam, waste tire rubber, EVA, NBR,

PE, PVC foam, and PU.

[10] The noise-proof element according to any one of claims 2 to 9, wherein one surface and/or both surfaces of the filling means are provided with a metal member selected from the group consisting of nickel, copper, silver, potassium, magnesium, cadmium, and aluminum.

[11] The noise-proof element according to claim 2, further comprising a spacing part between the upper plate and the filling means to absorb noise.

[12] The noise-proof element according to claim 11, wherein the spacing part further includes a nonwoven vibration isolation member composed of a nonwoven fabric sound absorption layer and nylon filaments sewn on one surface of the nonwoven fabric sound absorption layer.

[13] The noise-proof element according to any one of claims 1 to 9, wherein the upper plate and the supporting part are formed by foaming a PVC mixture comprising PVC, wood powder and mineral powder, in which a synthetic resin is used in an amount of 55-60 wt%, the wood powder is used in an amount of 25-30 wt%, and the mineral powder is used in an amount of 10-15 wt%.

[14] The noise-proof element according to any one of claims 1 to 9, wherein the upper plate and the supporting part are formed by foaming a PP mixture comprising PP and wood powder, in which 50-70 wt% wood powder is contained in the PP.

[15] The noise-proof element according to any one of claims 1 to 9, wherein the upper plate and the supporting part are formed using a synthetic resin and an in¬ combustible material.

[16] The noise-proof element according to claim 15, wherein the incombustible material is meteorite or vermiculite, in which the synthetic resin is used in an amount of 60-70 wt% and the meteorite or vermiculite is used in an amount of 30-40 wt%.

[17] The noise-proof element according to any one of claims 1 to 9, wherein a floor material, on which a nonwoven vibration isolation member composed of a nonwoven fabric sound absorption layer and nylon filaments sewn on one surface of the nonwoven fabric sound absorption layer is fused, is attached to an upper surface of the upper plate.

[18] The noise-proof element according to any one of claims 1 to 9, wherein a lateral spacing portion is formed at a side surface of the supporting part to minimize a contact area between the noise-proof element and a floor surface.

[19] A method of preventing interlayer noise, comprising: providing a slab; laminating a vibration isolation panel on the slab to prevent noise and vibration from being transmitted from an interlayer of a building; and laminating an upper layer on the vibration isolation panel, in which the vibration isolation panel comprises the noise-proof element of any one of claims 1 to 18.