KR20070067750A - Noise-blocking pad for architecture with excellent insulation of noise - Google Patents

Abstract

The noise isolation material for a building having excellent sound insulating efficiency is provided to cut off lightweight impact sound and heavyweight impact sound and to have physical properties suitable for using as a shock absorbing material such as adiabatic efficiency, durability, water resistance, etc. The noise isolation material for a building having excellent sound insulating efficiency comprises an upper layer composed of a resin composition containing 100 weight percent basic resins selected from ethylene vinyl acetate resins, polyurethane resin, polyethylene resins and polypropylene copolymer resins, 0.1~10 weight percent foaming agent, 0.1~10 weight percent cross-linking agent and 5~30 weight percent inorganic filler, and a lower layer composed of a resin composition containing 100 weight percent basic resins selected from ethylene vinyl acetate resins, polyurethane resin, polyethylene resins and polypropylene copolymer resins, 0.1~10 weight percent foaming agent, 0.1~10 weight percent cross-linking agent, 5~70 weight percent inorganic filler and 5~30 weight percent organic filler.

Description

Noise-blocking material for building with excellent sound insulation {NOISE-BLOCKING PAD FOR ARCHITECTURE WITH EXCELLENT INSULATION OF NOISE}

1 is a perspective view of a building noise blocking material according to the present invention.

2 is a cross-sectional view showing a state of use of the building noise shielding material according to the present invention.

<Description of the code>

1 --- Noise Barrier, 2 --- Protrusion,

3 --- upper layer of noise barrier, 4 --- lower layer of noise barrier,

5 --- bubble, 6 --- concrete slab,

7 --- air layer, 8 --- light foam concrete,

9 --- finish mortar, 10 --- floor finish.

The present invention relates to a building noise shielding material, and more particularly, a resin containing a base resin, a foaming agent, a crosslinking agent and an inorganic filler selected from at least one selected from ethylene vinyl acetate resin, polyurethane resin, polyethylene resin and polypropylene copolymer resin. The upper layer of the resin composition and the lower layer of the resin composition comprising a base resin, a foaming agent, a crosslinking agent, an inorganic filler and an organic filler selected from at least one selected from ethylene vinyl acetate resin, polyurethane resin, polyethylene resin and polypropylene copolymer resin. It is to provide a building noise shielding material excellent in sound insulation effect.

In general, in the construction of multi-storey multi-unit houses such as apartments or multi-family houses, a noise barrier is installed on the upper part of the concrete slab layer forming the floor of each floor to prevent noise between floors, and a lightweight foam concrete layer is placed on the noise barrier. After forming the to form a finishing mortar layer in which the heating pipe is embedded. Thus, the conventional noise shielding material installed to prevent the noise between floors of the multi-family house is manufactured in the form of a flat pad of soft synthetic resin or foamed synthetic resin material, and on the upper surface of the noise blocking material for firm bonding with the foam concrete layer. A lattice-shaped protrusion is formed, and a lower surface embossed portion is formed on the upper surface of the concrete slab layer to form a space between the concrete slab layer and the lower surface of the noise barrier material.

However, the conventional noise shielding material configured as described above has a function of attenuating the noise, but the fine bubbles constituting the noise blocking material are uniformly made so that the re-reflection of the sound occurs to reduce the noise due to the light impact and the weight impact. There was a problem that does not properly block absorption.

The present invention has been made to overcome the above problems, the object of the present invention is to make the size of the independent bubble in the foam non-uniform, and to make the components of the foam at least two or more, not a single material, light impact sound and weight It is to provide a building noise shielding material having physical properties that satisfy the requirements of thermal insulation, durability, water resistance, etc., as well as the shock sound blocking.

Building noise barrier material according to the present invention is 100 parts by weight of a basic resin selected from ethylene vinyl acetate resin, polyurethane resin, polyethylene resin and polypropylene copolymer resin 100 parts by weight, foaming agent 0.1 to 10 parts by weight, crosslinking agent 0.1 to 10 parts by weight And 100 parts by weight of a basic resin selected from at least one selected from an upper layer comprising a resin composition including 5 to 30 parts by weight of an inorganic filler, an ethylene vinyl acetate resin, a polyurethane resin, a polyethylene resin, and a polypropylene copolymer resin, and a foaming agent of 0.1 to 10 weight. It comprises a lower layer made of a resin composition comprising 0.1 to 10 parts by weight of the crosslinking agent, 5 to 70 parts by weight of the inorganic filler and 5 to 30 parts by weight of the organic filler.

Hereinafter, the component of the resin composition used for the said noise shielding material of this invention is demonstrated in detail.

(1) upper floor

The resin composition used for the upper layer of the noise barrier material of the present invention is 100 parts by weight of a basic resin selected from ethylene vinyl acetate resin, polyurethane resin, polyethylene resin and polypropylene copolymer resin, 0.1 to 10 parts by weight foaming agent, crosslinking agent 0.1 to 10 parts by weight and inorganic filler 5 to 30 parts by weight.

In the resin composition used in the upper layer, the ethylene vinyl acetate resin is preferably a melt flow index of 1 to 30 g / 10 minutes. When the melt flow index is less than 1 g / 10 minutes, the flowability of the resin is lowered. If it exceeds 30g / 10 minutes, there is a disadvantage that the mechanical properties of the resin is lowered.

The content of the vinyl acetate of the ethylene vinyl acetate resin is preferably 5 to 35% by weight. When the content is less than 5% by weight, the flexibility of the resin is lowered and the melting point of the resin is increased, so that the kneader or Since the processing temperature of the extruder has to be increased, there is a disadvantage in that premature decomposition of the blowing agent occurs, and when it exceeds 35% by weight, the mechanical properties of the resin are lowered and the specific gravity is increased.

As the base resin, the polyethylene resin preferably has a density of 0.95 g / cm 3 or less, but when the density exceeds 0.95 g / cm 3, the flexibility of the resin decreases, the crystallinity of the resin increases, the crystal melting point rises, and the resin composition In the manufacture of the need to increase the processing temperature of the kneader or extruder there is a disadvantage that occurs early decomposition of the blowing agent.

It is preferable that the melt flow index of the polyethylene resin is 1 to 30 g / 10 minutes. When the melt flow index is less than 1 g / 10 minutes, the flowability of the resin is lowered, and when the melt flow index is more than 30 g / 10 minutes, the resin mechanical There is a disadvantage that the physical properties are lowered.

The blowing agent in the resin composition used in the upper layer is at least one selected from the group consisting of azo compounds, nitroso compounds, sulfonylhydrazide compounds, azobisisobutyronitrile, diazoaminoazobenzene and sodium dicarbonate. The azo compound is more preferably an azodicarbonamide having a decomposition temperature of 130 to 190 ° C., and the nitroso compound is more preferably N, N′-dinitrosopentamethylenetetramine. The sulfonylhydrazide compound is more preferably selected from the group consisting of p-toluenesulfonylhydrazide and p, p'-oxybis (benzenesulfonylhydrazide).

The content of the blowing 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, when the content is less than 0.1 parts by weight, the hardness and specific gravity are very high, when the content exceeds 10 parts by weight by excessive foaming There is a disadvantage in that a foam having a stable cell structure cannot be obtained and the mechanical properties of the foam are sharply lowered.

The crosslinking agent in the resin composition used in the upper layer is t-butyl peroxy neodecanoate, t-butyl peroxy pivalate, t-butyl peroxy-2-ethylhexanoate, 1,1-di (t-butyl Peroxy) cyclohexane, t-butylcumylperoxide, t-butylperoxybenzoate.

The content of the crosslinking 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. When the content is less than 0.1 parts by weight, the effect is insignificant and there is no meaning of addition. There is a disadvantage that the mechanical properties are lowered.

Inorganic fillers in the upper resin composition may be selected from the group consisting of carbon black, barium sulfate, talc and calcium carbonate.

The content of the inorganic filler is preferably used 5 to 30 parts by weight based on 100 parts by weight of the basic resin, when the content is less than 5 parts by weight, the sound insulation effect is insufficient, when the content exceeds 30 parts by weight of workability is reduced The appearance is not good.

(2) lower floor

The resin composition used in the lower layer of the noise barrier material of the present invention is 100 parts by weight of a basic resin selected from ethylene vinyl acetate resin, polyurethane resin, polyethylene resin, and polypropylene copolymer resin, 0.1 to 10 parts by weight of foaming agent, crosslinking agent. 0.1 to 10 parts by weight, inorganic filler 5 to 70 parts by weight and organic filler 5 to 30 parts by weight.

The base resin, the blowing agent and the crosslinking agent in the resin composition used in the lower layer are the same as described above with respect to the components and contents of the resin composition used in the upper layer.

The inorganic filler used in the lower layer may be appropriately selected from the inorganic fillers that may be used in the upper layer, and the content thereof is 5 to 70 parts by weight based on 100 parts by weight of the basic resin. If the content is less than 5 parts by weight, the sound insulation effect is insufficient, and if it exceeds 70 parts by weight, the workability is lowered, the appearance is not good.

In the resin composition used in the lower layer, the organic filler is preferably a cured resin, and examples thereof include vulcanized rubber, polyester resin, and phenol resin. Among the cured resins, it is more preferable to use vulcanized rubber, and the particle size is 1 to 2000 µm. If the particle size is less than 1 μm, the bubble forming effect is insufficient. If the particle size is more than 2000 μm, the kneading property and workability are deteriorated, the deformation of the molded article is deteriorated, and the appearance state is poor.

The content of the organic filler is preferably used 5 to 30 parts by weight based on 100 parts by weight of the base resin, when the content is less than 5 parts by weight is insufficient to affect the formation of bubbles, when the organic content exceeds 30 parts by weight Agglomeration of the filler deteriorates vocal formation, resulting in poor appearance.

The building noise suppression material according to the present invention is produced by pressurizing and foaming together the upper layer and the lower layer in the form of a sheet.

The upper layer is a portion in contact with the concrete slab is formed uniformly fine bubbles.

In addition, any one surface other than the contact surface of the upper layer and the lower layer of the present invention may be formed with a plurality of protrusions at regular intervals to further increase the sound insulation effect. The protrusion may have a conical shape, a hemispherical shape, a cylindrical shape, a polygonal pillar shape, a polygonal pyramid shape, or the like.

The lower layer used in the building noise shielding material according to the present invention has a hardness of 25 to 45 (R-scale) and a foaming ratio of 60 to 120 times.

In addition, the lower layer is non-uniform in the cross section of the foam particles having a diameter of 20 ~ 2,000㎛. Such non-uniform bubbles are caused by the difference in the foaming speed between the organic filler and the base resin dispersed on the sheet during compression molding, and the organic filler acts to hinder the foaming of the base resin and creates bubbles around it. It acts as a nucleus to form.

Building noise barrier material of the present invention having a layer structure as described above can improve the sound insulation effect by inducing the effects of sound absorption, blocking and dispersion by changing the components of the upper and lower layers.

Figure 2 is a cross-sectional view of the state of use of the building noise shielding material according to the present invention. This will be described in detail as follows.

The cushioning protrusions 2 of the noise blocking material 1 according to the present invention are laminated on the bottom surface of the concrete slab 6, and the lightweight foam concrete 8, the finishing mortar 9, and the floor finishing material 10 are sequentially constructed. do. In an apartment or a multi-family house, for example, when noise caused by floor impact sound is transmitted to the finishing mortar 9 through the floor finishing material 10, a single noise reduction is performed in the lightweight foam concrete 8, and the attenuated noise is reduced. The noise blocking material 1 according to the present invention is reached. At this time, the noise is attenuated again in the noise blocking material (1). The principle is that the impact sound, vibration sound, and other noises incident on the noise blocking material (1) are first-order at the interface between the noise blocking material (1) and the lightweight foam concrete (8). It is extinguished, and then disappears at the interface between the upper and lower layers of the porous noise blocking material 1, and once again in the air layer 7 formed by the buffer protrusion 2, which is directly transmitted to the concrete floor slab 6. The amount of noise is significantly reduced.

Hereinafter, an example of a manufacturing method of the building noise shielding material according to the present invention will be described in detail.

The above-mentioned components except for the inorganic filler, the crosslinking agent and the blowing agent are first mixed using a kneader or a banbury mixer or the like. Increase the temperature of the kneader to 80 ° C before feeding. Specifically, the above-mentioned components except for the inorganic filler, the crosslinking agent and the blowing agent are added to the kneader, and after working at 80 to 115 ° C. for about 5 minutes, the mixture is inverted twice every two minutes, and the inorganic filler, the crosslinking agent and Work for 2 ~ 4 minutes after adding blowing agent. The mixed mixture is poured out, and the temperature of the mixture is 90-110 ° C., and the mixture is directly introduced by a transfer unit from the kneader to the open roll hopper, or ground to a suitable size using a resin grinder. After that, it is put into open roll manually. The mixture is rolled twice for 8 minutes to 1 mm thickness in an open roll at a temperature of 70 ~ 80 ℃, and then divided into 3 parts by 5 mm thickness to prepare a sheet-like mixture. The rolling operation is repeated once under the same operating conditions for even dispersion of the injected mixture. In this case, if the mixture is finely divided in the first rolling operation, the dispersion is better. The sheet-like mixture thus prepared is extruded using a calender to prepare a sheet-like sample. The temperature of a calender roll is made into 40-50 degreeC, roll interval is adjusted, and the thickness of a desired sheet is obtained. The obtained sheet-like sample was cut into an appropriate size and placed in two pieces on a drying stand and aged at room temperature for 2 hours. Then, the appropriate amount of the sheet was put into a mold to obtain a high temperature of 140 to 190 ° C and 5 to 600 kgf / cm ² . After compression molding for 2 ~ 60 minutes under pressure, the mold is opened and demolded to manufacture the noise barrier material for building. The upper layer and the lower layer are molded in the same manner as described above by changing only the resin or the additive material used, and only the prepared sheet-like samples can be manufactured by applying pressure and foaming together with the appropriate amount into the mold.

The present invention may be understood in more detail by the following examples, which are intended to illustrate the present invention and are not intended to limit the protection scope of the present invention.

[ Example ]

Example  1-6 and Comparative example

According to the components and contents shown in Table 1 below, the building sound insulating material was manufactured as follows. First, ethylene vinyl acetate resin (in the case of the lower layer, vulcanized rubber was added thereto and mixed in the kneader for about 9 minutes first), a blowing agent crosslinking agent, and an inorganic filler were added and mixed at 100 ° C. for 3 minutes. The mixture was rolled twice for 8 minutes at a temperature of 80 ° C. at a temperature of 80 ° C. using an open roll, worked to a thickness of 5 mm, and divided into three to prepare a sheet-like sample. An appropriate amount of upper and lower sheets were put together in a mold, and compression molded at 15O &lt; 0 &gt; C for 15 minutes to produce a building noise barrier material. Styrofoam was used as a comparative example.

Division (weight part) Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Upper layer EVA ¹⁾ 100 100 100 100 100 100 Blowing agent ²⁾ 10 10 10 10 10 10 Crosslinking agent ³⁾ One One One One One One Calcium carbonate 20 20 20 20 20 20 substratum EVA 100 100 100 100 100 100 blowing agent 10 10 10 10 10 10 Crosslinking agent One One One One One One Calcium carbonate 20 20 20 20 20 20 Barium sulfate - - - 5 20 40 Vulcanized Rubber 5 15 30 15 15 15

1) EVA: Ethylene Vinyl Acetate Resin

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

2) Foaming agent: Azodicarbonamide

3) Crosslinking agent: t-butyl cumyl peroxide

Property measurement method

The noise blocking material manufactured by the above example was measured for physical properties in the following manner.

① Specific gravity

The specific gravity of the foam was measured three times using an automatic specific gravity measuring device after removing the surface, and the average value was taken.

② heat resistance

Heat resistance evaluation was compared by measuring the heat deflection temperature in accordance with ASTM D648.

③ warpage resistance

Flexural resistance evaluation was measured by the method of ASTM D790 flexural modulus at room temperature.

④ Noise blocking

Light impact sound blocking property was measured by the method of KS F2810-1, and heavy shock sound blocking property was measured by the method of KS F2810-2. The sound measured when the frequency generator is 63Hz is expressed in decibels (dB). The lower the dB, the better the noise blocking effect.

Properties Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative example Specific gravity (g / cm ³ ) 0.21 0.20 0.17 0.22 0.24 0.28 0.25 Heat Deflection Temperature (℃) 110 110 110 110 110 110 70 Flexural modulus (kg / cm ² ) 7,000 7,000 7,000 7,000 7,000 7,000 - Lightweight Shock Sound (dB) 50 48 47 48 46 46 70 Heavy Shock Sound (dB) 49 48 46 47 45 44 85

As shown in Table 2, in the case of the embodiments within the component content range of the present invention, the weight shock sound blocking performance corresponding to the sound of the impact of small children falling below 58dB, the sound of children playing It satisfies all the criteria of 50dB or less and shows excellent physical properties in specific gravity, heat deformation temperature and flexural modulus.

When the building noise barrier material of the present invention is manufactured with the type and content of the resin composition according to the present invention, it is not only excellent in the ability to block light impact sound and heavy impact sound, but also provides requirements for insulation, durability, water resistance, etc. to be used as a cushioning material. It has the effect of having physical properties to meet.

Claims (15)

100 parts by weight of a basic resin selected from ethylene vinyl acetate resin, polyurethane resin, polyethylene resin and polypropylene copolymer resin, 0.1 to 10 parts by weight of foaming agent, 0.1 to 10 parts by weight of crosslinking agent and 5 to 30 parts by weight of inorganic filler 100 parts by weight of a basic resin selected from at least one selected from an upper layer composed of a resin composition, an ethylene vinyl acetate resin, a polyurethane resin, a polyethylene resin and a polypropylene copolymer resin, 0.1 to 10 parts by weight of a foaming agent, and 0.1 to 10 parts by weight of a crosslinking agent. And a lower layer made of a resin composition comprising 5 to 70 parts by weight of an inorganic filler and 5 to 30 parts by weight of an organic filler. According to claim 1, wherein the ethylene vinyl acetate resin is a vinyl acetate content of 1 to 50% by weight, the building noise barrier material, characterized in that the melt flow index is 1 ~ 30g / 10 minutes. According to claim 1, The polyethylene has a density of 0.95g / cm 3 or less, the building noise barrier material, characterized in that the melt flow index is 1 ~ 30g / 10 minutes. The method of claim 1, wherein the blowing agent is one or more selected from the group consisting of azo compounds, nitroso compounds, sulfonylhydrazide compounds, azobisisobutyronitrile, diazoaminoazobenzene and sodium dicarbonate Noise barrier material for construction. According to claim 4, The azo compound is a noise barrier material for building, characterized in that the decomposition temperature is 130 to 190 ℃ azodicarbonamide. The noise barrier material for building according to claim 4, wherein the nitroso-based compound is N, N'-dinitrosopentamethylenetetramine. According to claim 4, wherein the sulfonyl hydrazide compound is a building noise barrier material, characterized in that selected from the group consisting of p-toluenesulfonyl hydrazide and p, p'-oxybis (benzenesulfonyl hydrazide). . The method of claim 1, wherein the crosslinking agent is t-butylperoxy neodecanoate, t-butylperoxy pivalate, t-butylperoxy-2-ethylhexanoate, 1,1-di (t-butylper Hydroxy) cyclohexane, t-butyl cumyl peroxide, t-butyl peroxy benzoate. The building noise suppression material according to claim 1, wherein the inorganic filler is selected from the group consisting of carbon black, barium sulfate, talc and calcium carbonate. According to claim 1, wherein the organic filler is building noise barrier material, characterized in that at least one selected from the group consisting of vulcanized rubber, polyester and phenol resin. 11. The noise barrier material for building according to claim 10, wherein the vulcanized rubber has a particle size of 1 to 2,000 µm. The noise barrier material of claim 1, wherein the noise barrier material is formed by pressurizing and foaming the upper layer and the lower layer in a sheet form. The noise barrier material for building according to claim 1, wherein a plurality of protrusions are formed on one surface other than the contact surface between the upper layer and the lower layer. 14. The building noise barrier of claim 13, wherein the protrusion is selected from the group consisting of conical, hemispherical, cylindrical, polygonal, and polygonal pyramids. According to claim 1, wherein the lower layer has a hardness of 25 to 45 (R-scale), the foaming ratio is 60 to 120 times, the bubble of 20 to 2,000㎛ diameter is characterized in that the non-uniform in the cross section of the foam particles Noise barrier materials for construction.

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