KR100662591B1 - Structure with excellent sound insulation for construction - Google Patents

Abstract

A noise insulation material for construction with an excellent sound insulation function is provided to improve economic efficiency, reduce environmental pollution, and improve the sound insulation function by absorbing, interrupting and distributing noise. A noise insulation material for construction with an excellent sound insulation function comprises an upper layer, a middle layer, and a lower layer. The upper layer is a resin composite constituted by one of ethylene-vinyl acetate copolymer resin, polyurethane resin and polypropylene copolymer resin as a base resin, a foaming agent, a foaming aid, and a sound insulating filler. The middle layer is a resin composite constituted by one of ethylene-vinyl acetate copolymer resin and polypropylene copolymer resin as a base resin, and a sound insulating filler. The lower layer is a composite constituted by one of ethylene-vinyl acetate copolymer resin, polyurethane resin and polypropylene copolymer resin as a base resin, a foaming agent, a foaming aid, and a sound insulating filler.

Description

Sound insulation material for building with excellent sound insulation {STRUCTURE WITH EXCELLENT SOUND INSULATION FOR CONSTRUCTION}

The present invention relates to a building noise barrier material for economical and low environmental pollution, excellent light impact sound and heavy impact sound insulation, and more particularly, to a building noise shielding material having excellent sound insulation effect against heavy impact sound compared to conventional products.

Currently, styrofoam, which is generally used as a heat insulating material or a building noise blocking material, is deteriorated or melted by admixture mixed in concrete of a building with time. Therefore, the styrofoam inherent in the building loses its role as a noise blocking material after a certain time. In addition, the styrofoam inherent in the reconstruction of large buildings such as apartments have poor mechanical properties, such as the scattering of powder due to the physical impact accompanying dismantling, and requires a considerable cost and labor. In addition, when a fire occurs, there is a disadvantage that it easily ignites and generates toxic gas.

Noise blocking effect by Styrofoam or general plastic foam is already known, but their sound insulation effect has been proved for light impact sound (comparatively light and hard impact floor impact), but heavy impact sound (relatively heavy and soft impact) Floor impact noise), the effect is insufficient.

The present invention is to solve the above problems, the object of the present invention is economical and less environmental pollution, the three-layer structure of the upper layer, middle layer and lower layer has the effect of sound absorption, blocking and dispersion of different It is to provide a noise barrier material for construction, which is excellent in sound insulation effect, in particular excellent sound insulation effect against heavy impact sound.

According to the present invention, there is provided a building noise shielding material, which is composed of three layers of an upper layer, an intermediate layer, and a lower layer, and has excellent light impact sound and heavy impact sound insulation.

Hereinafter, each component layer of the building noise shielding material of this invention is explained in full detail.

[Upper layer]

The resin composition forming the upper layer of the building noise shielding material of the present invention includes one of ethylene-vinylacetate copolymer resin, polyurethane resin, and polypropylene copolymer resin as a base resin, a foaming agent, a foaming aid, and a sound insulating filler. It is done by

In the resin composition forming the upper layer of the building noise shielding material of the present invention, the ethylene-vinylacetate (EVA) copolymer resin used as the base resin has a vinyl acetate content of 1 to 50% by weight, a melt flow index ( Melt Index) is preferably in the range of 0.3 to 30 g / 10 minutes, but outside this range, the workability such as foamability is poor, which is not preferable.

In the resin composition forming the upper layer of the building noise shielding material of the present invention, it is preferable that the polyurethane resin used as the base resin has a melt flow index of 0.05 to 50 g / 10 minutes. Apart is not desirable.

In the resin composition forming the upper layer of the building noise shielding material of the present invention, the polypropylene copolymer resin used as the base resin has an ethylene content of 0.1 to 70% by weight and a melt flow index of 0.3 to 30 g / 10 minutes. Outside this range, the workability such as foamability is poor, which is not preferable.

The blowing agent included in the resin composition forming the upper layer of the building noise barrier material of the present invention, such as azodicarbonamide, azobisisobutyronitrile, diazoaminoazobenzene, etc., having a decomposition temperature of 130 to 190 ° C. Nitroso-based compounds such as compounds, N, N'-dinitrosopentamethylenetetramine, sulfonylhydrazide-based compounds such as p-toluenesulfonylhydrazide and p, p'-oxybis (benzenesulfonylhydrazide) and one or more of carbonate-based compounds such as sulfonyl-based compounds such as p-toluenesulfonyl semimica, and sodium dicarbonate.

The foaming agent is preferably used in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the basic resin. If the content is less than 0.1 part by weight, the hardness and specific gravity of the foam are very high. This is because there is a problem in that the mechanical properties of the foam cannot be obtained rapidly.

The foaming aid included in the resin composition forming the upper layer of the building noise barrier material of the present invention is used for foaming processing and improving the physical properties of the foam, magnesium oxide, calcium oxide, zinc oxide, cadmium oxide, mercury oxide, lead oxide, etc. At least one of metal oxides, magnesium carbonate, stearic acid, stearamide, zinc stearate, zinc carbonate, calcium carbonate, barium stearate, urea and urea derivatives.

The foaming aid is preferably used 0.1 to 10 parts by weight with respect to 100 parts by weight of the base resin, if less than 0.1 parts by weight is not smooth foam processing, if more than 10 parts by weight of the mechanical properties of the foam is sharply reduced Because there is.

The sound insulating filler included in the resin composition forming the upper layer of the building noise shielding material of the present invention is used to reinforce the sound insulation effect, and may be used by selecting one or more from the group consisting of carbon black, barium sulfate, talc and calcium carbonate. Can be.

The carbon black may be used having an average particle diameter of 2 ~ 10㎛, it is preferable to use 5 to 40 parts by weight with respect to 100 parts by weight of the basic resin, when less than 5 parts by weight, the impact of light impact sound insulation is reduced, 40 weight It is because there exists a problem that kneading property and workability will fall when it exceeds a part.

In addition, the barium sulphate may be used having an average particle diameter of 2 ~ 5㎛, it is preferable to use 5 to 50 parts by weight with respect to 100 parts by weight of the basic resin, when less than 5 parts by weight of the impact impact sound insulation is reduced, It is because there exists a problem that kneading property and workability will fall when it exceeds 50 weight part.

In addition, the talc may use an average particle diameter of 2 ~ 10㎛, it is preferable to use 10 to 60 parts by weight with respect to 100 parts by weight of the basic resin, when less than 10 parts by weight, the impact impact sound insulation is reduced, 60 It is because there exists a problem that kneading property and workability will fall when exceeding a weight part.

In addition, the calcium carbonate may be used having an average particle diameter of 2 ~ 8㎛, it is preferable that the content of 10 to 60 parts by weight with respect to 100 parts by weight of the basic resin, when less than 10 parts by weight, the weight impact sound insulation effect is lowered, It is because there exists a problem that kneading property and workability will fall when it exceeds 60 weight part.

The upper layer of the building noise barrier of the present invention may be in the form of a foam or an unfoamed sheet.

[Middle floor]

The resin composition which forms the intermediate | middle layer of the building noise shielding material of this invention contains 1 type of ethylene-vinylacetate copolymer resin and a polypropylene copolymer resin, and a sound insulation filler as a base resin.

In the resin composition for forming the intermediate layer of the building noise shielding material of the present invention, the ethylene-vinylacetate copolymer resin, the polypropylene copolymer resin and the acoustic filler used as the base resin are the same as those described for the upper layer.

The intermediate layer of the building noise barrier of the present invention may be in the form of a honeycomb, a short plastic sheet or a bead foam.

[substratum]

The resin composition which forms the lower layer of the building noise shielding material of the present invention comprises one of an ethylene-vinylacetate copolymer resin, a polyurethane resin and a polypropylene copolymer resin as a base resin, a foaming agent, a foaming aid and a sound insulating filler. It is made to include.

In the resin composition forming the lower layer of the building noise shielding material of the present invention, an ethylene-vinylacetate copolymer resin, a polyurethane resin, a polypropylene copolymer resin and a foaming agent, a foaming aid, and a acoustic filler are used as the base resin. Same as described for.

The lower layer of the building noise barrier of the present invention may be in the form of a foam or an unfoamed sheet.

The resin composition for forming the building noise shielding material of the present invention may further include additives commonly used in the resin composition for flooring, in addition to the above components, within the scope of achieving the object of the present invention.

Referring to one example of the manufacturing method of the building noise shielding material of the present invention in detail.

First, in order to manufacture each layer used in the present invention, the resin composition components of each layer are stirred and mixed at each temperature above the melting point of the base resin by using a kneader or banbury mixer or the like. The mixture is placed directly from the kneader to the extruder hopper, and is directly added to the molten state or cooled, and the solidified resin composition is pulverized to a suitable size with a resin grinder and then introduced into the extruder in a solid state. Upon completion of the dosing, the resin composition is extruded into pellets using a single-screw or twin-screw extruder for resin. At this time, the extrusion temperature should be selected above the melting point of the resin and below the decomposition temperature of the blowing agent, it is preferable to extrude at a temperature of 90 ~ 160 ℃. If the extrusion temperature is less than 90 ° C, the resin will not be sufficiently melted, and the resin melt pressure will be excessively increased, making extrusion difficult. If the temperature exceeds 160 ° C, the resin will be easily melted, but excessive foaming may occur. Because it is difficult to do. The pellets thus prepared are sufficiently dried using a dryer, and then an appropriate amount of pellets are put into a mold, and compression molding is performed for 2 to 60 minutes at a high temperature and pressure of 140 to 190 ° C and 5 to 600 kgf / cm 2. After the mold is opened, the mold can be instantaneously demolded to produce pads for each layer used in the present invention.

In this way, by combining the three layers of the noise shielding pads manufactured in this way, the final noise suppression material may be manufactured. As a lamination bonding method for manufacturing the final noise shielding material, any of lamination methods generally known in the art may be used.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.

Comparative example  And Example  1-7

For each layer, 100 parts by weight of the basic resin as shown in Table 1 was first mixed in the kneader for about 9 minutes, and then 5 parts by weight of azodicarbonamide as a foaming agent, 5 parts by weight of magnesium oxide as a foaming aid and a negative filler 15 parts by weight of carbon black, barium sulfate, talc and calcium carbonate were each added, and further mixed for 3 minutes, the total mixing time was 12 minutes.

The mixture was pulverized with a resin crusher, fed to a twin screw extruder (diameter = 30 mm, L / D = 29), and extruded into pellets of resin. The pellets were placed in a mold and compression-molded and foamed at 150 ° C. and 400 kgf / cm 2 for 35 minutes to prepare pads of each layer constituting the building noise barrier material.

Between the pads of each layer prepared as described above, lamination was carried out by interposing an adhesive layer made of ethylene-vinylacetate copolymer resin (20% by weight of vinyl acetate content, 5 g / 10 min of melt flow index), and lamination. The noise shields were prepared, respectively, and the comparative example was manufactured in the same manner as in Example, but the noise shields were not included. The noise barrier properties for the light impact sound and heavy impact sound of these manufactured noise barrier materials were measured by the following measuring method, and the results are shown in Table 1.

Noise barrier  How to measure

The sound insulation was measured using the floor impact sound measurement method specified in KS F2810-1 / 2. The sound measured when the frequency generator is 63Hz is expressed in decibels (dB). The lower the dB, the better the noise blocking effect.

Table 1

Upper layer Mezzanine substratum Noise barrier (dB) Resin Content (parts by weight) rescue Resin Content (parts by weight) rescue Resin Content (parts by weight) rescue Light impact Heavy impact sound Comparative example Single layer structure consisting of 100 parts by weight Example 1 EVA 100 firing EVA 100 Honeycomb EVA 100 firing 50 50 2 EVA 100 Unfoamed EVA 100 Honeycomb PP 100 Unfoamed 55 50 3 EVA 100 firing PP 100 Danfra PP 100 firing 58 55 4 PU 100 Unfoamed EVA 100 Honeycomb PP 100 firing 55 50 5 PP 100 firing EVA 100 Honeycomb PU 100 firing 55 49 6 PP 100 firing PP 100 Honeycomb EVA 100 Unfoamed 55 50 7 PP 100 firing PP 100 Danfra PP 100 firing 55 50

 Note) EVA: ethylene-vinylacetate copolymer resin

         (Vinyl acetate content 15% by weight, melt flow index 15g / 10 minutes)

PU: polyurethane resin

          (Melt flow index 2g / 10min)

PP: polypropylene copolymer resin

(Ethylene content 10 wt%, melt flow index 10g / 10min)

As can be seen from Table 1, the noise blocking material of the present invention satisfies all of the less than 76dB, the first class of light impact sound blocking performance, less than 66dB, the first class of heavy shock sound blocking performance.

Building noise shielding material produced by the present invention is excellent in sound insulation effect, in particular has an effect of excellent sound insulation against heavy impact sound.

Claims (8)

 As a base resin, the upper layer which consists of a resin composition containing 1 type of ethylene-vinylacetate copolymer resin, a polyurethane resin, and a polypropylene copolymer resin, and a foaming agent, a foaming adjuvant, and a sound insulation filler; An intermediate layer comprising a resin composition comprising one of an ethylene-vinylacetate copolymer resin and a polypropylene copolymer resin and a sound insulating filler as a basic resin; And a lower three-layer structure consisting of an ethylene-vinylacetate copolymer resin, a polyurethane resin, and a polypropylene copolymer resin as a base resin, and a resin composition comprising a foaming agent, a foaming aid, and a sound insulating filler. Good sound insulation material for building. The ethylene-vinylacetate copolymer resin according to claim 1, wherein the ethylene-vinylacetate copolymer resin included in the resin composition forming the upper layer, the middle layer, or the lower layer has a melt flow index of 0.3 to 30 g / 10 minutes and a vinyl acetate content of 1 to 50 weight. Noise barrier material for building, characterized in that%. According to claim 1, wherein the polyurethane resin contained in the resin composition to form the upper layer or lower layer has a melt flow index of 0.05 ~ 50g / 10 minutes, the building noise barrier material. The polypropylene copolymer resin of claim 1, wherein the polypropylene copolymer resin included in the resin composition forming the upper layer, the middle layer, or the lower layer has an ethylene content of 0.1 to 70 wt% and a melt flow index of 0.3 to 30 g / 10 minutes. Noise barrier materials for construction. According to claim 1, wherein the blowing agent is selected from the group consisting of azo compounds, nitroso-based compounds, sulfonyl hydrazide compounds, sulfonyl compounds and carbonate compounds having a decomposition temperature of 130 ~ 190 ℃, basic 0.1-10 weight part with respect to 100 weight part of resin is contained in the resin composition. The method of claim 1, wherein the foaming aid is magnesium oxide, calcium oxide, zinc oxide, cadmium oxide, mercury oxide, lead oxide, magnesium carbonate, stearic acid, stearamide, zinc stearate, zinc carbonate, calcium carbonate, barium stearate, urea and urea At least one selected from the group consisting of derivatives, noise reduction material for building, characterized in that 0.1 to 10 parts by weight based on 100 parts by weight of the base resin is included in the resin composition. According to claim 1, wherein the acoustic filler is at least one selected from the group consisting of carbon black, barium sulfate, talc and calcium carbonate, the carbon black is 5 to 40 parts by weight, the barium sulfate relative to 100 parts by weight of the basic resin Is 5 to 50 parts by weight, the talc is 10 to 60 parts by weight, and the calcium carbonate is 10 to 60 parts by weight contained in the resin composition. The method of claim 7, wherein the carbon black has an average particle diameter of 2 to 10㎛, barium sulfate has an average particle diameter of 2 to 5㎛, talc has an average particle diameter of 2 to 10㎛, calcium carbonate has an average particle diameter of 2 to 10 Noise barrier material for building, characterized in that 8㎛.