KR100654739B1 - Noise-blocking pad for architecture with excellent heavy noise-blocking and flame resistance - Google Patents

Abstract

     The present invention relates to a building noise shielding material having excellent weight impact sound insulation and flame retardancy, and more particularly, to a resin composition comprising an ethylene-vinylacetate (EVA) copolymer, a foaming agent, carbon black, and a halogen-based flame retardant. Light impact shock barrier layer consisting of two layers of a heavy impact sound barrier layer consisting of a resin composition comprising a resin selected from a polypropylene resin, a polyethylene resin and a polypropylene resin / polyethylene resin mixture, halogen-based flame retardant, barium sulfate, calcium carbonate It relates to a building noise blocking material characterized in that the laminated.

Ethylene-vinylacetate, polypropylene resin, heavy impact sound barrier

Description

       Noise-blocking material for building with excellent impact resistance against weight and flame retardancy {NOISE-BLOCKING PAD FOR ARCHITECTURE WITH EXCELLENT HEAVY NOISE-BLOCKING AND FLAME RESISTANCE}

      The present invention relates to a building noise shielding material for economical and low environmental pollution, excellent sound insulation and flame retardancy, and more particularly, to a building noise shielding material excellent in sound insulation effect against weight impact sound compared to conventional products.

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

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

An object of the present invention is to solve the above problems, to provide an economical noise shielding material for building construction with low environmental pollution and excellent sound insulation effect and flame retardancy against heavy impact sound.

      Building noise barrier material of the present invention is made of two layers of a light impact sound barrier layer and a heavy impact sound barrier layer, the lightweight impact sound barrier layer is a resin containing an ethylene-vinylacetate copolymer, foaming agent, carbon black and halogen-based flame retardant The weight impact sound barrier layer is made of a resin composition comprising a resin selected from a polypropylene resin, a polyethylene resin and a polypropylene resin / polyethylene resin mixture, barium sulfate, calcium carbonate and a halogen-based flame retardant.

In the resin composition (hereinafter referred to as "lightweight impact sound barrier layer resin composition") for forming a lightweight impact sound barrier layer of the noise barrier material for building construction of the present invention, the ethylene-vinylacetate (EVA) copolymer has a melt flow index ( Melt Index) is preferably 1 to 30 g / 10 minutes, because less than 1 g / 10 minutes, the flowability of the resin is lowered, and when it exceeds 30 g / 10 minutes, the mechanical properties of the resin are lowered.

Preferably, the EVA copolymer has a vinyl acetate content of 5 to 35% by weight. If it is less than 5% by weight, the flexibility of the resin decreases and the melting point of the resin rises, thereby increasing the processing temperature of the kneader or the extruder when the resin composition is manufactured. This is because there is a disadvantage that the early decomposition of, and when more than 35% by weight, the mechanical properties of the resin is lowered and the specific gravity is increased.

In the lightweight impact sound barrier layer resin composition used in the present invention, the blowing agent preferably has a decomposition temperature of 130 to 190 ° C, and includes azodicarbonamide, azobisisobutyronitrile, diazoaminoazobenzene, and the like. Nitroso-based compounds such as crude compounds, N, N'-dinitrosopentamethylenetetramine, sulfonylhydrazides such as p-toluenesulfonylhydrazide and p, p'-oxybis (benzenesulfonylhydrazide) One or more of sulfonyl compounds, such as a compound and p-toluenesulfonyl semicarba, can be selected and used.

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 EVA copolymer. If the content is less than 0.1 parts by weight, the hardness and specific gravity are very high. This is because there is a problem in that the mechanical properties of the foam cannot be obtained rapidly.

In the lightweight impact sound barrier layer resin composition used in the present invention, carbon black may have an average particle diameter of 2 to 10 μm, and preferably 5 to 40 parts by weight based on 100 parts by weight of the EVA copolymer. It is because there exists a problem that light weight impact sound insulation effect falls when it is less than 5 weight part, and kneading property and workability fall when it exceeds 40 weight part.

In the lightweight impact sound barrier layer resin composition used in the present invention, the halogen-based flame retardant is one of decabromodiphenyl ether, ethylene-bis (tetrabromophthalimide), bispentabromophenoxyethane, and mixtures thereof. It can be selected and used above.

The halogen flame retardant is preferably used 10 to 30 parts by weight based on 100 parts by weight of the EVA copolymer, when less than 10 parts by weight can not be obtained excellent flame retardant grade at 1/32 inch thickness, exceeds 30 parts by weight This is because there is a problem that the mechanical property retention rate is lowered.

In the light weight impact sound barrier layer resin composition used in the present invention, within the scope of achieving the object of the present invention, other additives commonly used in the preparation of the resin composition for flooring materials (foaming aid, decomposition) Preparation, etc.) may be further included.

Examples of the foaming aids for the foaming process and the improvement of the physical properties of the foam include metal oxides such as magnesium oxide, calcium oxide, zinc oxide, cadmium oxide, mercury oxide and lead oxide, magnesium carbonate, stearic acid, stearamide, zinc stearate, zinc carbonate, Calcium carbonate, barium stearate, and the like, and may be used in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the EVA copolymer.

Examples of the decomposition aid include urea, urea derivatives, and the like, and may be used in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the EVA copolymer.

In the resin composition for forming the weight impact sound barrier layer of the building noise barrier material of the present invention (hereinafter referred to as "weight impact sound barrier layer resin composition"), the polypropylene resin preferably has a melt flow index of 0.3 to 10 g / 10 minutes, 0.3 g It is because there exists a problem that the flowability of resin will fall when it is less than / 10 minutes, and the mechanical property of resin falls when it exceeds 10 g / 10 minutes.

The polypropylene resin is a homopolymer or a copolymer, and in the case of a copolymer, the ethylene content is preferably 0.1 to 70% by weight. When the polypropylene resin exceeds 70% by weight, the stiffness is lowered and the heat resistance is poor. This is because there is a problem that the material is not suitable. Herein, the copolymer is meant to include random polymers and block polymers.

In the weight-impact sound barrier layer resin composition used in the present invention, the polyethylene resin has a density of 0.915-0.95 g / cm 3 and a melt flow index of 0.05-10 g / 10 min. This is because there is a problem of lowering the flow rate of the resin when the melt flow index is less than 0.05 g / 10 minutes, and the mechanical properties of the resin decreases when the melt flow index is more than 10 g / 10 minutes.

In the weight-impact sound blocking layer resin composition used in the present invention, the mixing ratio of the polypropylene resin / polyethylene resin mixture is preferably 95 to 50/5 to 50 by weight ratio, which is to be achieved in the present invention. This is because there is a problem that the weight shock sound blocking effect is not obtained.

In the weight-impact sound blocking layer resin composition used in the present invention, barium sulfate may be used having an average particle diameter of 2 ~ 5㎛, it is preferable that the content of 5 to 50 parts by weight based on 100 parts by weight of the resin, 5 weight It is because there exists a problem that a weight impact sound insulation effect falls when it is less than a part, and when it exceeds 50 weight part, kneading property and workability fall.

In the weight impact sound barrier layer resin composition used in the present invention, 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 resin, 10 weight It is because there exists a problem that a weight impact sound insulation effect falls when it is less than a part, and when it exceeds 60 weight part, kneading property and workability fall.

In the weight-impact sound blocking layer resin composition used in the present invention, the halogen-based flame retardant is at least one of decabromodiphenyl ether, ethylene-bis (tetrabromophthalimide), bispentabromophenoxyethane and mixtures thereof. Can be selected and used.

The halogen flame retardant is preferably used 10 to 30 parts by weight with respect to 100 parts by weight of the resin, when less than 10 parts by weight can not be obtained excellent flame retardancy grade at 1/32 inch thickness, if it exceeds 30 parts by weight mechanical properties This is because there is a problem that the retention rate is lowered.

In addition, the light weight impact sound barrier layer resin composition and the weight impact sound barrier layer resin composition used in the present invention may further include a flame retardant aid, and pentaerythritol-based compounds having a polyhydric alcohol group such as dipentaerythritol and tripentaerythritol are preferable. This pentaerythritol-based compound is used as a flame retardant because it acts as a char promoter to assist in the generation of char during combustion.

The amount of 0.1 to 15 parts by weight of the flame retardant aid further included in the lightweight impact sound barrier layer resin composition and the weight impact sound barrier layer resin composition used in the present invention is 100 parts by weight of the ethylene-vinylacetate copolymer or the resin. It is desirable to be included. If this amount is less than 0.1 part by weight, the function as a flame retardant aid cannot be exhibited. If it exceeds 15 parts by weight, the heat resistance of the resin composition is lowered.

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

First, the lightweight impact sound barrier layer resin composition and the heavy impact noise barrier layer resin composition components used in the present invention are stirred and mixed at each temperature above the melting point of the resin by using a kneader or a 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 flame retardant, and is preferably extruded 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, which is compressed for 2 to 60 minutes at a high temperature and pressure of 140 to 190 ° C and 5 to 600 kgf / cm ² . After molding), the mold is opened instantaneously and deformed and foamed at the same time to produce a light impact sound barrier layer and a heavy impact sound barrier layer pad used in the present invention.

That is, each resin composition used in the present invention is prepared in pellet form using an extruder, and then compression molded and foamed to produce two kinds of pads for noise suppression, followed by laminating these two layers of noise shielding pads. In combination, the final product can be made a noise shield. As the laminated bonding method for manufacturing the final noise shielding material, any of the lamination methods generally known in the art may be used.

     Hereinafter, the present invention will be described in detail by way of example, but the present invention is not limited thereto.

Examples 1-11

Manufacture of Lightweight Shock Absorber Layer Pads

100 parts by weight of an EVA copolymer having a vinyl acetate content and MI as shown in Table 1 below was first mixed in a kneader for 9 minutes, and then each component and content as shown in Table 1 was added and mixed for 3 minutes, and then totally mixed. The time was 12 minutes.

The mixture was pulverized with a resin crusher, put into a twin screw extruder (Diameter = 30 mm, L / D = 29), and extruded to form pelletized resin particles. The pellet was placed in a mold and compression molded at 150 ° C. and 400 kgf / cm ² for 35 minutes to prepare a lightweight impact sound barrier layer pad.

The physical properties (flame retardancy and noise blocking property) of the lightweight impact sound barrier pads prepared in Examples 1 to 11 were measured, and the results are shown in Table 1.

Examples 12-23

Heavy shock sound barrier pad manufacturing

Polypropylene resins having ethylene content and MI as shown in Table 2 (Examples 12 to 14), or polyethylene resins having density and MI as shown in Table 2 (Examples 15 to 17), or the following table 100 parts by weight of a polypropylene resin / polyethylene resin mixture (Examples 18 to 23) having a mixing ratio as shown in Fig. 2 was first mixed in a kneader for 9 minutes, and then each component and content as shown in Table 2 was added thereto A heavy impact sound barrier layer pad was prepared in the same manner as the light impact impact sound barrier layer pad manufacturing method.

The physical properties (flame retardancy and noise blocking property) of the heavy impact sound barrier layer pads prepared in Examples 12 to 23 were measured, and the results are shown in Table 2.

Comparative Examples 1 to 3

Manufacture of Lightweight Shock Absorber Layer Pads

      A lightweight impact sound barrier layer pad was prepared in the same manner as in Examples 1 to 11, except that an EVA copolymer having vinyl acetate content and MI as shown in Table 1 was added and the remaining components were not added. It was.

Comparative Examples 4-6

Heavy shock sound barrier pad manufacturing

Polypropylene resin having ethylene content and MI as shown in Table 2 (Comparative Example 4), or polyethylene resin having density and MI as shown in Table 2 (Comparative Example 5), or as shown in Table 2 below. A weight impact sound barrier layer pad was prepared in the same manner as in Examples 12 to 23, except that a polypropylene resin / polyethylene resin mixture (Comparative Example 6) having the same mixing ratio was added and the remaining components were not added. It was.

Property measurement method

      Physical properties of the (light) weight impact sound barrier layer pad molded article prepared by the above Examples and Comparative Examples were measured in the following manner.

     ① Flame retardant

     The flame retardancy evaluation was based on the UL Subject 94 (Underwriters Laboratories Incorporation) "combustibility test of plastic materials for machine parts" vertical burning test in the vertical phase (V0). The test fraction used was 1/32 inch thick.

     ② Noise barrier

     Noise isolation was measured using the floor impact sound measurement method specified in KS F2810. 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

R-1 B C F-1 F-2 Flame Retardant Grade (UL) Noise barrier (dB) VA content (wt%) / MI Content (parts by weight) Content (parts by weight) Content (parts by weight) Content (parts by weight) Comparative Example 1 5/1 0 0 0 0 radish 80 Comparative Example 2 35/30 0 0 0 0 radish 80 Comparative Example 3 20/5 0 0 0 0 radish 80 Example 1 5/1 0.1 20 10 0.1 V-2 70 Example 2 20/5 0.1 20 10 0.1 V-2 70 Example 3 20/5 5 20 10 0.1 V-2 68 Example 4 20/5 10 20 10 0.1 V-2 65 Example 5 20/5 10 20 30 15 V-0 65 Example 6 20/5 0.1 5 10 0.1 V-2 70 Example 7 20/5 5 40 10 0.1 V-2 68 Example 8 20/5 10 20 10 0.1 V-2 65 Example 9 35/30 10 20 30 15 V-0 65 Example 10 20/5 10 10 10 One V-2 68 Example 11 20/5 10 10 10 One V-2 68

* R-1; Ethylene Vinyl Acetate Copolymer

* B; azodicarbonamide (foaming agent), C; carbon black

* F-1; decabromodiphenyl ether (flame retardant), F-2; dipentaerythritol (flame retardant)

TABLE 2

R-2 R-3 A-1 A-2 F-1 F-2 Flame Retardant Grade (UL) Noise barrier (dB) Ethylene Content (wt%) / MI Content (parts by weight) Density / MI Content (parts by weight) Content (parts by weight) Content (parts by weight) Content (parts by weight) Content (parts by weight) Comparative Example 4 10/5 100 - 0 0 0 0 0 radish 85 Comparative Example 5 - 0 0.94 / 5 100 0 0 0 0 radish 85 Comparative Example 6 10/5 50 0.94 / 5 50 0 0 0 0 radish 85 Example 12 10/5 100 - 0 5 10 10 0.1 V-2 65 Example 13 10/5 100 - 0 50 60 10 0.1 V-2 50 Example 14 10/5 100 - 0 20 20 10 0.1 V-2 60 Example 15 - - 0.94 / 5 100 5 10 10 0.1 V-2 65 Example 16 - - 0.94 / 5 100 50 60 30 15 V-0 50 Example 17 - - 0.94 / 5 100 20 20 30 15 V-0 60 Example 18 10/5 50 0.94 / 5 50 5 10 30 15 V-0 65 Example 19 10/5 50 0.94 / 5 50 50 60 30 15 V-0 50 Example 20 10/5 50 0.94 / 5 50 20 20 10 10 V-1 60 Example 21 10/5 95 0.94 / 5 5 20 20 10 10 V-1 60 Example 22 0.1 / 0.3 50 0.915 / 0.05 50 20 20 10 10 V-1 60 Example 23 70/10 50 0.95 / 10 50 20 20 10 10 V-1 60

* R-2; Polypropylene resin, R-3; Polyethylene resin

* A-1; barium sulfate, A-2; calcium carbonate

* F-1; decabromodiphenyl ether (flame retardant), F-2; dipentaerythritol (flame retardant)

As can be seen in Tables 1 and 2 above, the light weight impact sound barrier layer pads prepared in Examples 1 to 11 and the weight impact sound barrier layer pads prepared in Examples 12 to 23 are each of the first class of light impact sound barrier performance criteria. It satisfies all of below 76dB, below 66dB, which is the 1st criterion for heavy shock sound blocking performance.

On the contrary, the light weight impact sound barrier layer pads prepared by Comparative Examples 1 to 3 and the weight impact sound barrier layer pads prepared by Comparative Examples 4 to 6 were each more than 76 dB, which is the first class of light impact sound barrier performance criteria, and the heavy impact sound barrier performance criteria 1 Impact sound blocking performance was worse than the 66dB suddenly, and the flame retardancy is also poor.

     The building noise shielding material manufactured by the present invention is excellent in sound insulation effect and flame retardancy, and in particular, has an effect of excellent sound insulation against heavy impact sound compared to conventional products.

Claims (9)

It is a building noise shielding material laminated with two layers of a light impact sound barrier layer and a heavy impact sound barrier layer, wherein the lightweight impact sound barrier layer is made of a resin composition comprising an ethylene-vinylacetate copolymer, a foaming agent, carbon black and a halogen-based flame retardant. And the weight impact sound barrier layer comprises a resin composition comprising a resin selected from a polypropylene resin, a polyethylene resin and a polypropylene resin / polyethylene resin mixture, barium sulfate, calcium carbonate and a halogen-based flame retardant. According to claim 1, The lightweight impact sound barrier layer is based on 100 parts by weight of ethylene-vinyl acetate copolymer 0.1 to 10 parts by weight of blowing agent, 5 to 40 parts by weight carbon black having an average particle diameter of 2 to 10㎛, halogen flame retardant 10 Noise barrier material for building comprising a resin composition comprising ˜30 parts by weight. According to claim 1 or 2, wherein the ethylene vinyl acetate melt flow index of 1 ~ 30g / 10 minutes, the building noise barrier material, characterized in that the vinyl acetate content of 5 to 35% by weight. According to claim 1 or 2, wherein the blowing agent has a decomposition temperature of 130 ~ 190 ℃, characterized in that at least one selected from the group consisting of azo compounds, nitroso-based compounds, sulfonyl hydrazide compounds and sulfonyl compounds Building noise shielding material. The halogen-based flame retardant according to claim 1 or 2, wherein the halogen flame retardant is selected from the group consisting of decabromodiphenyl ether, ethylene-bis (tetrabromophthalimide), bispentabromophenoxyethane, or a mixture thereof. Building noise barrier, characterized in that one or more selected. The resin composition according to claim 2, wherein the resin composition further comprises 0.1 to 10 parts by weight of the foaming aid, 0.1 to 10 parts by weight of the decomposition aid, and 0.1 to 15 parts by weight of the flame retardant aid based on 100 parts by weight of the ethylene-vinylacetate copolymer. Building noise shielding material. According to claim 1, The weight impact sound barrier layer is 5-50 parts by weight of barium sulfate having an average particle diameter of 2 ~ 5㎛, based on 100 parts by weight of the resin selected from polypropylene resin, polyethylene resin and polypropylene resin / polyethylene resin mixture, A noise barrier material for construction, comprising a resin composition comprising 10 to 60 parts by weight of calcium carbonate having an average particle diameter of 2 to 8 μm and 10 to 30 parts by weight of a halogen-based flame retardant. The method of claim 7, wherein the polypropylene resin has a melt flow index of 0.3 ~ 10g / 10 minutes, the polyethylene resin has a melt flow index of 0.05 ~ 10g / 10 minutes, the density is 0.915 ~ 0.95 g / cm 3, the poly Propylene resin / polyethylene resin mixture is a noise barrier for building, characterized in that the mixing ratio of 95 to 50/5 to 50 by weight. The noise barrier material for building according to claim 7 or 8, further comprising 0.1 to 15 parts by weight of a flame retardant aid based on 100 parts by weight of the resin.