KR20100067848A - Soundproof structure of between floors in building - Google Patents

Abstract

PURPOSE: A soundproof material between floors in a building is provided to create pleasant residential environment by improving soundproof and vibration-proof properties between floors. CONSTITUTION: A soundproof material between floors in a building comprises a first urethane foam sheet(10), a mass layer(20), a second urethane foam sheet(30), and a waterproof sheet(40). The mass layer is loaded on the top of the first urethane foam sheet. The second urethane foam sheet is loaded on the top of the mass layer. The waterproof sheet is loaded on the top of the second urethane foam sheet. The second urethane foam sheet has relatively smaller density than the first urethane foam sheet.

Description

Soundproof Structure of between floors in building}

The present invention relates to an interlayer noise absorbing material, and more particularly, to an interlayer sound absorbing material having a novel structure having excellent interlayer noise removing and dustproofing effects and having an interlayer insulating function.

In addition to the improvement of living standards, the desire to maintain a comfortable and comfortable living environment is increasing, and accordingly, the sensitivity to the noise generated around the living is also increasing. In particular, common residential spaces such as apartments often have a sensitive response to the noise generated from the outside of the building and the noise generated between the upper and lower floors.

In order to reduce such noise between floors, various kinds of noise between floors are provided. However, the situation does not effectively remove vibrations and noises generated between floors of buildings.

On the other hand, conventionally there is a problem that unnecessary energy is wasted, such as a part of the heat generated from the heating pipe installed on the floor of the slab is transferred to the lower layer.

The present invention is to solve the above problems, the object of the present invention is to excellent noise removal and dustproof function between the floor, when constructing on the slab of the building to create a comfortable living environment, excellent insulation between floors of the building The aim is to provide a new layered noise absorbing material that can increase energy savings and heating efficiency.

According to the present invention, the first urethane foam sheet 10, the mass layer 20 laminated on the upper surface of the first urethane foam sheet 10, and the first surface of the mass layer 20 are laminated on the first surface. It characterized in that it comprises a second urethane foam sheet 30 having a relatively smaller density than the urethane foam sheet 10, and a waterproof sheet 40 laminated on the upper surface of the second urethane foam sheet 30 An interlayer noise material is provided.

According to another feature of the invention, the first urethane foam sheet 10 is provided with an interlayer noise material, characterized in that jute fiber sheet 12 is inserted.

According to another feature of the present invention, a plurality of recessed grooves 14 of the first urethane foam sheet 10 is formed, the first urethane foam sheet 10 by the recessed grooves 14 of the bottom surface An interlayer sound absorbing material is provided, characterized in that only 75 to 85% is in contact with the slab bottom (1).

According to another feature of the invention, the first urethane foam sheet 10 has a density of 140 ~ 180kg / ㎥, the second polyurethane foam sheet 30 is characterized in that the density of 20 ~ 30kg / ㎥ An interlayer noise material is provided.

The present invention having the configuration as described above is laminated with a plurality of sheets having different physical properties to reduce the noise and vibration generated between the layers. In particular, the jute fiber sheet 12 is inserted into the first urethane foam sheet 10, and the impedance value, which is the transfer resistance of the sound waves, is increased, so that the floor shock sound blocking performance is excellent. In addition, by forming a concave groove 14 in the bottom surface of the first urethane foam sheet 10 to adjust the contact area between the slab bottom (1) and the interlayer noise absorbing material is constructed, the impact sound blocking performance is improved.

In addition, the second urethane foam sheet 30 having a low density is formed to be somewhat thick, and the second urethane foam sheet 30 acts as a spring element, thereby effectively absorbing vibration caused by an interlayer impact. Since the sheet 30 also has a thermal insulation function between the layers, heat transfer between the layers is blocked, and thus energy saving effect is also expected.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view showing an embodiment of the present invention, Figure 2 is a cross-sectional view thereof. As shown in the present invention, the first urethane foam sheet 10, the mass layer 20 laminated on the upper surface of the first urethane foam sheet 10, which is installed on the slab bottom surface 1, The second urethane foam sheet 30 is laminated on the upper surface of the mass layer 20 and has a density relatively smaller than that of the first urethane foam sheet 10, and the upper surface of the second urethane foam sheet 30 is laminated. It is made of a waterproof sheet 40.

The first urethane foam sheet 10 functions to suppress the occurrence of vibration due to impact as well as sound insulation. This first urethane foam sheet 10 has a relatively high density. The mass layer 20 is attached to the upper surface of the first urethane foam sheet 10, and the mass layer 20 is formed of a high weight EVA compound. The mass layer 20 also acts as a weight element of the interlayer noise absorbing material together with the first urethane foam sheet 10, thereby suppressing vibration occurrence and sound insulation.

The second urethane foam sheet 30 has a relatively low density compared to the first urethane foam sheet 10. The second urethane foam sheet 30 has a sound absorbing and vibration absorbing function as well as a heat insulating function. Preferably, the first urethane foam sheet 20 has a density of about 140 to 180 kg / m 3, and the second urethane foam sheet 30 preferably has a density of 20 to 30 kg / m 3. The waterproof sheet 40 is laminated on the upper surface of the second urethane foam sheet 30. Preferably, the waterproof sheet 40 is made of an EVA film. The waterproof sheet 40 is provided with a waterproof function to the interlayer sound absorbing material.

According to the present invention having such a configuration, the mass layer 20 is first attached to the first urethane foam sheet 10, and the first urethane foam sheet 10 and the second urethane foam sheet to which the mass layer 20 is attached ( 20) and the waterproof sheet 40 is laminated, by applying or spraying an adhesive between the respective members to adhere each member.

On the other hand, preferably the concave groove 14 is formed in a predetermined form on the bottom surface of the first urethane foam sheet 10. The concave grooves 14 increase the buffering force of the interlayer noise absorbing material, thereby improving the impact sound blocking performance. As can be seen through the embodiment to be described later, according to the size and number of the concave groove 14, the area where the interlayer noise material is in contact with the slab floor and the buffering force of the interlayer noise material is changed, so that the impact sound blocking performance is changed, the recess groove You need to adjust the size and number of.

In addition, preferably, the jute fiber sheet 12 is inserted into the first urethane foam sheet 10. Preferably, the mass layer 20 is laid in the mold, and the jute fiber sheet 12 is laminated thereon, and then the urethane stock solution is injected and foamed to form the first urethane foam sheet 10. In this way, the jute fiber sheet 12 is inserted inside, and the first urethane foam sheet 10 having the mass layer 20 attached to the upper surface is obtained.

As such, when the jute sheet 12 is inserted into the first urethane foam sheet 10, the impedance value, which is the transfer resistance of the sound wave, is increased, thereby improving the blocking performance of the impact sound. When the surface density of the jute fiber sheet 12 (kg / ㎡, the weight of the fiber per unit area) is higher, the impedance value, which is the transfer resistance of sound waves, increases, so that the impact sound blocking performance is improved, and the surface density of the jute fiber sheet 12 is the same. As the jute yarn forming the jute fiber sheet 12 is thinner, the surface area of the jute fiber sheet 12 is increased so that the impedance value is increased and the impact sound blocking performance is increased. In some cases, the jute fiber 12 may be cut and mixed into the first urethane foam sheet 10.

Example 1

A first urethane foam sheet having a thickness of 10 mm and a density of 150 kg / m 3, an EVA compound, a mass layer having a thickness of 1 mm and a density of 2000 kg / m 3, a second urethane foam sheet having a thickness of 19 mm and a density of 20 kg / m 3; , Laminated waterproof sheet made of EVA film having a thickness of 1mm to make the interlayer noise material. In this way, the impact sound blocking performance of the interlayer noise produced was measured. As a comparison value, the impact sound blocking performance of the existing interlayer noise absorbing material formed by laminating PE foam sheet, PET sheet, and EVA foam sheet was measured.

The results are shown in the graph of Figure 5, through which it can be seen that the interlayer noise material according to the present invention has an excellent impact force blocking performance than the existing interlayer noise material.

Example 2

A first urethane foam sheet having a thickness of 10 mm and a density of 150 kg / m 3, and having a rectangular recessed groove arranged in front, rear, left, and right sides, EVA compound, and a mass layer having a thickness of 1 mm and a density of 2000 kg / m 3; The second urethane foam sheet having a thickness of 19 mm and a density of 20 kg / m3 and a waterproof sheet made of an EVA film having a thickness of 1 mm to make an interlayer sound absorbing material. Interlayer noise material was made. At this time, the size and number of recessed grooves were adjusted so that only 60%, 75%, and 85% of the bottom surfaces of the first urethane foam sheet contacted the slab bottom surface. And the impact force transmission performance of each interlayer noise material was tested, and the value was compared with the impact force blocking performance of the interlayer noise material (contact area with slab bottom 100%) without concave groove of Example 1. The results are shown in the graph of FIG.

Referring to FIG. 6, a recess is formed in the bottom of the first urethane foam sheet so that the bottom surface of the first urethane foam sheet is not 100% in contact with the slab bottom. It can be seen that the impact blocking performance is superior to that when the bottom of the urethane foam is in contact with the slab bottom 100%. Moreover, even when the recessed groove is formed, only 75% of the bottom surface area of the first urethane foam sheet contacts the slab bottom, and the impact resistance is excellent. Only 85% of the bottom area of the first urethane foam sheet contacts the slab bottom. It can be seen that there is a significant level of impact force blocking performance.

Example 3

A first urethane foam sheet having a thickness of 10 mm and a recessed groove formed on the bottom, an EVA compound, a mass layer having a thickness of 1 mm and a density of 2000 kg / m3, a second urethane foam sheet having a thickness of 19 mm and a density of 20 kg / m3 and a thickness of Laminated waterproof sheet made of EVA film of 1mm to make an interlayer noise material, four kinds of interlayer noise material was made by varying the density of the first urethane foam sheet to 100, 140, 150, 180kg / ㎥ respectively. At this time, the size and number of the concave grooves were adjusted so that only 75% of the bottom surface of the first urethane foam sheet was in contact with the slab bottom. The impact force blocking performance of these interlayer noise materials was tested, and the results are shown in the graph of FIG.

Looking at Figure 7, it can be seen that the higher the density of the first urethane foam sheet, the better the impact force transmission performance. However, when the density of the first urethane foam sheet is 180kg / ㎥, 200kg / ㎥ compared to the case where the density is 150kg / ㎥, the impact resistance was lower. Through this, when the density of the first urethane foam sheet exceeds 180kg / ㎥ can be seen that the impact force blocking performance is sharply reduced as the density of the first urethane foam sheet increases. In addition, when the density of the first urethane foam sheet is 100kg / ㎥ showed a shock force blocking performance similar to the conventional interlayer noise absorbing material (see Figure 1 of Example 1). Therefore, when the density of the first urethane foam sheet is excessively high or low, the impact force blocking performance is lowered, so in the present invention, the density of the first urethane foam sheet is limited to 140 to 180 kg / m 3.

Example 4

It is 10mm thick, and a recess is formed in the bottom surface, and the inside is made of a first urethane foam sheet having jute sheets inserted therein, and an EVA compound. A second urethane foam sheet and a waterproof sheet made of an EVA film having a thickness of 1 mm were laminated to prepare a plurality of interlayer sound absorbing materials. The size and number of concave grooves were adjusted so that only 75% of the first urethane foam sheet was in contact with the slab bottom. The impact force blocking performance of the interlayer noise absorber was tested, and the value was compared with the impact force blocking performance of the layer noise absorbent having the same conditions as in Example 2. The result is shown in FIG. 8.

As a result of this experiment, it can be seen that the interlayer noise material in which the jute sheet is inserted is superior in the impact performance of the impact force as compared to the case in which the jute sheet is not inserted.

In the above embodiment, the floor impact force blocking performance of the present invention was tested. As the floor impact impact force is higher, the noise generated is larger, so that the impact force is cut off and the impact force transmitted between the layers is reduced, so that the interlayer noise is also reduced. Therefore, the interlayer noise absorber according to the present invention is excellent in impact force blocking performance, that is, the sound absorbing and insulating effect on the interlayer noise.

1 is a perspective view showing an embodiment of the present invention

2 is a cross-sectional view of the embodiment

Figure 3 is a cross-sectional view showing another embodiment of the present invention

Figure 4 is a cross-sectional view showing another embodiment of the present invention

5 to 8 is a graph showing the impact force blocking performance of the interlayer sound absorbing material according to each embodiment of the present invention

Claims (4)

The first urethane foam sheet 10, the mass layer 20 laminated on the upper surface of the first urethane foam sheet 10, and the first urethane foam sheet 10 laminated on the upper surface of the mass layer 20. The interlayer noise absorbing material comprising a second urethane foam sheet 30 having a relatively smaller density and a waterproof sheet 40 laminated on the upper surface of the second urethane foam sheet 30. The method of claim 1, wherein the first urethane foam sheet 10, jute fiber sheet 12 is characterized in that the interlayer noise material, characterized in that inserted. According to claim 1, wherein a plurality of recessed grooves 14 of the first urethane foam sheet 10 is formed, the first urethane foam sheet 10 by the recessed grooves 14 is 75 ~ of the bottom area An interlayer noise material, characterized in that only 85% of the slab floor (1) is in contact. According to claim 1, wherein the first urethane foam sheet 10 has a density of 140 ~ 180kg / ㎥, the second polyurethane foam sheet 30 has an interlayer noise material, characterized in that the density of 20 ~ 30kg / ㎥.

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