KR100900642B1 - Interfloor noise proofing material and floor execution method using the same - Google Patents

Abstract

The present invention relates to an interlayer sound insulating material containing an open cell and comprising a polyurethane foam having a thickness of 15 mm or more, and a floor construction method using the same. The present invention optimizes physical properties such as the thickness, open cellization rate, dynamic modulus, hardness and / or density of the polyurethane foams included in the sound insulating material, and in some cases forms various functional layers on one or both sides of the foam. The present invention provides an interlayer sound insulation material having excellent physical properties such as interlayer sound insulation, cushioning property, mechanical strength, workability and heat insulation, and a floor construction method using the same.

Interlayer sound insulation material, polyurethane foam, thickness, open cell, open cell rate, dynamic modulus, hardness

Description

Interlayer noise proofing material and floor execution method using the same

The present invention has excellent physical properties such as cushioning, mechanical strength, workability, and thermal insulation, and in particular, an interlayer sound insulating material and a floor using the same that can effectively absorb, disperse, and / or exhaust noise and / or vibration generated by an impact. It is about a construction method.

In multi-collected multi-story buildings such as multi-family homes, townhouse villas, buildings, apartments, schools, hospitals, and dormitories, people live on the upper and lower floors, and are caused by the impacts and / or impacts from the upper floors. The noise of noise causes great inconvenience to the lower class. Such shocks and noises are also referred to as floor impact sounds, which means sounds and shocks generated by vibrations of the slab caused by falling and moving objects or walking of people. The solid sound generated in such a case is transmitted to various positions with extremely low attenuation to vibrate the surface of the structure, and thus the floor impact sound is recognized as the air transmission sound reflected directly to the lower floors.

Recently, the floor noise caused by the floor impact sound is recognized as an important factor in determining the quality of the residential environment. In other words, while the consumer's desire for a comfortable living environment continues to increase, the material used for the floor structure of a multi-story building is getting thinner and lighter, and the internal noise source is increasing. As the problem caused by the floor impact sound is highlighted as a socially important issue, it is installed on the wall or floor of the multi-story building to absorb, disperse and / or exhaust the shock and / or noise applied from the upper floor to the lower floor or the side. The research on the development of sound insulation materials for the purpose of doing so is being actively conducted.

For example, Republic of Korea Patent No. 166993 discloses a rubber material mixed with an adhesive material on a slab, a polyethylene foam sponge is laminated on the top thereof to form a barrier layer, and a bottom is formed on the foam sponge. The construction method is disclosed. In addition, Korean Patent Laid-Open Publication No. 2006-38862 discloses a thermoplastic foam having a foam ratio of 5 to 200 times and a foam cell of a specific diameter, which can be used as an interlayer noise suppression material of a building.

All of the said prior art uses resin foam foam as a member for reducing interlayer noise. Such resin foams have been conventionally provided for the purpose of heat insulation or cushioning, and examples thereof include foams such as polyethylene, polystyrene or polyvinyl chloride. However, in the case of the conventional foam as described above, but the degree of insulation or shock buffering is achieved to some extent, the effect of absorbing, dispersing and / or exhausting the floor impact sound that is the main cause of the intercalation noise is not satisfactory.

The present invention is made in consideration of the above-described prior art, by optimizing the structure and / or physical properties of the polyurethane foam foam constituting the inter-layer sound insulation material, to prevent the floor impact sound effectively and the floor construction method using the above The purpose is to provide.

The present invention as a means for solving the above problems,

An interlayer sound insulating material containing an open cell and comprising a polyurethane foam foam having a thickness of 15 mm or more is provided.

As for the polyurethane foam contained in the said sound insulation material of this invention, it is more preferable that thickness is 40 mm or more. In addition, the polyurethane foam is preferably 60% or more, more preferably 80% or more open cellization rate.

It is preferable that the polyurethane foam of this invention has a dynamic modulus of 0.5-10 MN / m <^{3> further} . In addition, the density of the polyurethane foam is preferably 10 to 25 Kg / m ³ .

It is preferable that the polyurethane foam of this invention is 5-50 kgf / 314cm <^2> in hardness, and it is more preferable that it is 5-22 kgf / 314cm <^2> .

The interlayer sound insulating material of the present invention may further include a functional layer formed on one or both sides of the polyurethane foam. At this time, examples of the functional layer may include one or more selected from the group consisting of a dimensionally stable layer, a waterproof layer, a heat insulating material layer, and a reinforcing board layer. In addition, in the present invention, irregularities may be formed on at least one surface or both surfaces selected from the group consisting of the polyurethane foam and the functional layer.

The present invention also provides another means for solving the above problems,

It provides a floor construction method comprising the step of constructing the interlayer sound insulating material according to the present invention on the slab.

In the method of the present invention may further comprise the step of sequentially constructing the concrete layer, mortar layer and floor finish on the interlayer sound insulation material constructed.

The present invention is to optimize the physical properties such as the thickness and / or open cellization rate of the polyurethane foam foam included in the sound insulating material, and in some cases by forming a variety of functional layers on one or both sides of the foam, sound insulation, cushioning It provides an interlayer sound insulation material with excellent physical properties such as mechanical strength, workability and heat insulation, and floor construction method using the above.

The present invention relates to an interlayer sound insulating material containing an open cell and comprising a polyurethane foam having a thickness of 15 mm or more. The present invention provides an interlayer sound insulation material that can effectively absorb and exhaust the noise and vibration caused by the impact by optimizing the thickness and / or open cellization rate of the polyurethane foam used in the interlayer sound insulation material.

Hereinafter, the interlayer sound insulation material according to the present invention will be described in more detail.

The interlayer sound insulating material of the present invention is characterized by including a polyurethane foam having a structure having an open cell. The term &quot; open cell &quot; used in the present invention is a cell included in a foamed foam, and is a concept that includes all cells in which at least a part is open (see FIG. 1). Polyurethane foam has a foam cell structure consisting of an open cell and a closed cell. The heavy sealed cell is a typical rigid foam structure, and has excellent thermal insulation properties due to the low thermal conductivity of carbon dioxide, pentane and CFC11 trapped inside the cell. On the other hand, the open cell is a soft foam structure, the wall of the cell is broken at the final stage of foam formation, and is formed of a web-like elastic structure. The polyurethane foam of the present invention preferably comprises such an open cell such that the open cell ratio is 20% or more, more preferably 60% or more, and most preferably 80% or more. The term "open cellization rate" used in the present invention means the ratio of the volume occupied by the open cell to the total cell volume in the foam. If the open cellization rate is less than 20%, there is a fear that the desired sound insulation effect may not be obtained. In the present invention, the upper limit of the open cellization rate is not particularly limited, but is preferably 90%. When the open cellization rate of a polyurethane foam foam exceeds 90%, there exists a possibility that the hardness and / or heat insulation of a foam may fall too much. Although not particularly limited, the diameter of the open cell included in the foam of the present invention is preferably 0.05 to 2.0 mm. If the diameter is smaller than 0.05 mm, the impact sound barrier property is inferior, and if it exceeds 2.0 mm, there is a fear that the hardness is too low.

Polyurethane foam is included in the sound insulating material of the present invention is characterized by having a thickness of 15 mm or more. The thickness of the foam is more preferably 30 mm or more, most preferably 40 mm or more. If the thickness is smaller than 15 mm, the impact sound barrier property may be deteriorated. In addition, the upper limit of the thickness of the said foam is not specifically limited, For example, it is 60 mm. If the thickness exceeds 60 mm, there is a fear that construction restrictions.

The polyurethane foam of the present invention also preferably has a dynamic modulus of elasticity (dynamic elastic properties of the object) specified in KS F 2868 in the range of 0.5 to 10 MN / m ³ , and 0.5 to 7 MN / m ³ It is more preferable that it is and it is most preferable that it is 0.5-2 MN / m <^3> . When the value of the dynamic modulus is smaller than 0.5 MN / m ³ , effective impact sound blocking is possible based on flexible elasticity when dynamic load is applied, but the physical resistance to stress is lowered, so the floor finish surface is deformed according to the upper load. There is a fear that cracks may occur, and if it exceeds 10 MN / m ³ , the stability of the foam is secured, but there is a fear that the impact sound reduction effect is lowered.

In addition, the polyurethane foam according to the present invention preferably has a hardness (compressive strength) in the range of 5 to 50 kgf / 314 cm ² , and more preferably in the range of 5 to 22 kgf / 314 cm ² . The hardness is 5 kgf / 314cm ² If less than that, the ductility of the foam is too large, there is a fear that the bottom is depressed when a load is applied from the top, if more than 50 kgf / 314cm ² there is a fear that the impact sound blocking effect is lowered.

The polyurethane foam is also preferably in the range of 10 to 25 Kg / m ³ in terms of complementary aspects of sound insulation, mechanical properties and cushioning. If the density is less than 10 Kg / m ³ , there is a fear that the mechanical properties and buffering properties are lower than the excellent sound insulation properties, and if it exceeds 25 Kg / m ³ , on the contrary, in terms of mechanical properties and buffering properties, but sound insulation This may fall.

The method for producing the polyurethane foam as described above is not particularly limited, and raw materials and production methods generally used in this field may be used without limitation. For example, the polyurethane foam may be prepared by foaming a foamable resin composition prepared by mixing an additive such as a foaming agent with a base resin including an isocyanate and a polyol through a mechanical method or UV irradiation. . At this time, the foaming ratio is preferably 500% (five times) or more, but is not particularly limited and may be appropriately adjusted according to the physical properties such as the desired open cell ratio, dynamic modulus and hardness. Examples of blowing agents which may be used at this time include sulfonyl hydrazides such as p, p'-oxybis (benzenesulfonyl hydrazide), benzenesulfonyl hydrazide or toluenesulfonyl hydrazide; Azo compounds such as azodicarbonamide (ADCA) or azobis isophtyronitrile; Organic blowing agents including nitroso compounds such as N, N'-dinitrosopentamethylene tetramine or N, N'-dimethyl-N, N'-dinitrosoterephthalamide; Inorganic blowing agents containing sodium bicarbonate or ammonium bicarbonate can be used. In addition, examples of other additives that may be added to such a resin composition may include at least one selected from the group consisting of water, phosphorus and halogen-based flame retardants, pigments, dyes, fillers such as inorganics, dispersants and surfactants. In the present invention, a foamed foam is prepared using the foamable resin composition containing the above components. The foaming process is preferably performed in an inert gas atmosphere such as carbon dioxide, nitrogen, air, helium or neon, but is not limited thereto. At this time, those skilled in the art can easily control the physical properties, such as the cell structure, density or compressive strength of the foam by adjusting the content of the components in the foamable composition or the amount of charge into the mold.

The interlayer sound insulating material of the present invention may further include a functional layer formed on one or both sides of the aforementioned polyurethane foam. Formation of the functional layer in the above means that the functional layer or the like is bonded or laminated. As used herein, the term "bonding" refers to a state in which the components are bonded to each other by means of conventional adhesive means (e.g., solid adhesive, hot melt adhesive, heat, ultrasonic or double-sided adhesive tape, etc.) in this field. And all the faces abutting are joined or partially joined. In addition, "lamination" means a state in which components are overlapped without using a separate coupling means.

The kind of the functional layer as described above is not particularly limited, and includes general layers in this field such as, for example, dimensionally stable layers, waterproof layers, insulation layers, or reinforcement board layers. In the above dimensional stability layer is preferably used that the dimensional change rate is within 0.5%, for example, glass fiber; Synthetic resin film; And woven or nonwoven fabrics made of natural or synthetic fibers, and it is preferable to use glass fibers from the viewpoint of having excellent dimensional stability and tear strength. In addition, examples of the waterproof layer include a liquid impermeable synthetic resin film; Or a synthetic resin impregnated or coated on a woven or nonwoven fabric such as polyester fiber; Examples of the insulation layer include synthetic resin foam sheets such as polystyrene foam sheets, polypropylene foam sheets or polyvinylacetate foam sheets; Glass wool; Rock wool; Mineral wool; And nonwoven fabrics; Examples of reinforcing board layers include inorganic modes such as plastic boards or gypsum boards; Wood plywood; Wood powder crimp board; And mixing boards of wood powder and inorganic materials. Although it does not specifically limit, In this invention, it is preferable to use a honeycomb board as said reinforcement board. The term "honeycomb board" used in the present invention means a board composed of hexagonal units as shown in the attached 8, wherein the material constituting the hexagonal unit is not particularly limited, for example, It can be composed of materials of reinforcement board. As described above, when the honeycomb board is composed of an aggregate of hexagonal units, the durability and strength of the honeycomb board are further improved, and thus the resistance to compressive stress, torsion or warpage generated in the state of use of the sound insulating material can be further improved. Specific examples of each functional layer may be included alone in the interlayer sound insulating material of the present invention, or may be included in the sound insulating material as a multilayer structure in which two or more layers are laminated or bonded.

The number, type, and / or formation order of the respective functional layers used in the interlayer sound insulating material of the present invention are determined depending on the use of the building to be constructed, and the like, and are not particularly limited. That is, the sound insulation material of the present invention may include only one kind of the above-described functional layer, or may be formed on one or both sides of the heterogeneous layer of the above. In addition, in the present invention, the sound insulation material unit in which various functional layers are formed on one or both sides of the polyurethane foam may be repeatedly formed to form one sound insulation material.

The interlayer sound insulating material of the present invention may also have irregularities of various shapes such as wave patterns or squares on one or both surfaces of the polyurethane foam layer and / or the functional layer. As a result of the formation of the unevenness, a buffer port (see FIGS. 4 and 5) is formed between the layers laminated or bonded, thereby further improving physical properties such as impact buffering and thermal insulation. In addition, when the unevenness is formed in the layer in contact with the slab surface on which the sound insulating material is constructed, there is an advantage in that easy workability can be secured even when the slab has low smoothness (see FIG. 8).

Hereinafter, with reference to the accompanying drawings will be described in more detail one aspect of the state of use of the interlayer sound insulating material of the present invention.

First, the interlayer sound insulation material of the present invention may be composed of the above-described polyurethane foam foam 10 alone as excellent sound insulation, cushioning and heat insulation as shown in FIG. In addition, the interlayer sound insulating material of the present invention may have a structure in which the polyurethane foam foam 10 is used as a main material and the dimensionally stable layer 20 is formed on both surfaces as shown in FIG. 3. At this time, the dimensional stabilization layer 20 is a single layer or two or more layers of the above-described embodiment.

4 is attached to the dimensional stability layer 20 is formed on both sides of the polyurethane foam foam 10, the interlayer sound insulating material 100 of the present invention formed a waterproof layer 30 on the upper surface of each of the dimensional stability layer 20 Represents the sun. Specific types of the waterproof layer 30 used at this time are as described above, and in the present invention, such a layer may be formed in a single layer or a multilayer structure. In addition, FIG. 5 is a cross-sectional view of the interlayer sound insulating material 100 having the heat insulating material 40 formed on one surface of the polyurethane foam 10. Unevenness 45 protrudes downward from the heat insulating material 40 shown in FIG. 5. The unevenness 45 forms a space (buffer) 46 between the polyurethane foam 10 and the heat insulator 40, thereby further improving shock buffering and heat insulating properties. The interlayer sound insulating material of the present invention may also have a structure in which the heat insulating material 40 and the waterproof layer 30 are sequentially formed on one surface of the polyurethane foam 10 as shown in FIG. 6. FIG. 7 illustrates a sound insulation material structure in which the structure shown in FIG. 6 is formed twice.

8 shows an interlayer sound insulating material 100 having a reinforcing board 50 formed on one surface of a polyurethane foam foam 10. The type of reinforcement board that can be used at this time is not particularly limited, and specific examples thereof are as described above. Although not specifically limited, in the present invention, it is preferable to use the honeycomb board 50 in which the hexagonal units 55 are assembled to form a honeycomb as a reinforcing board.

The various layer structures described above are only one aspect of the interlayer sound insulating material of the present invention, and in the present invention, various functional layers are appropriately selected according to the intended use, with a single or double layer polyurethane foam foam 10 as the main substrate. The shape of the sound insulation can be determined. The interlayer sound insulation material may be installed on walls, ceilings, and floors of buildings such as apartments and buildings, and may be particularly useful as a material for sound insulation and / or cushioning between building floors.

The present invention also provides

It relates to a floor construction method comprising the step of constructing the interlayer sound insulation material 100 according to the present invention on the slab (S).

In the floor construction method of the present invention,

The method may further include sequentially constructing the concrete layer 200, the mortar layer 300, and the floor finish 400 on the constructed interlayer sound insulating material.

9 is a view illustrating one embodiment of the floor construction structure formed by the construction method as described above. Specifically, FIG. 9 illustrates a laminated structure in which the heat insulating material 40, the polyurethane foam foam 10, the dimensional stability sheet 20, and the waterproof sheet 30 in which the unevenness 45 is formed on the slab S are sequentially formed. The interlayer sound insulating material has a construction state, and the symbol W represents the wall of the building. As shown in FIG. 9, the interlayer sound insulation material 100 according to the present invention is installed on the surface of the slab S, thereby effectively blocking shock sound or vibration. Although not particularly limited, in the floor construction structure of the present invention, it is preferable that the heat insulator 40 having the unevenness 45 formed at the bottom thereof to be in contact with the surface of the slab S, and the waterproof layer 30 is positioned at the top of the sound insulation material. Do. As described above, when the unevenness 45 is brought into contact with the slab S, there is an advantage that the ease of construction can be ensured even when the smoothness of the slab S is inferior.

The present invention may further include the step of forming and curing the concrete layer 200, preferably a lightweight foam concrete layer, and then forming the mortar layer 300 in the interlayer sound insulation material 100 constructed. . Typically, the mortar layer 300 has a pipe P for heating and / or gas piping. As such, the sound insulation material, the concrete layer, and the mortar layer are sequentially formed, and then finish with the flooring material 400. Such a specific construction method of each step of the method of the present invention is not particularly limited, and the above can be easily performed using the interlayer sound insulation material of the present invention and a general construction method in this field.

Hereinafter, the present invention will be described in more detail through examples according to the present invention and comparative examples not according to the present invention, but the scope of the present invention is not limited to the examples given below.

Example  And Comparative Example  Properties of Foam Foam

Tests were carried out by setting the foams having the physical properties shown in Tables 1 and 2 as Examples and Comparative Examples. The evaluation method of the physical property of the foam used at this time was as follows.

<Property evaluation method>

(1) open Cell rate

Open cellization rate was measured using a Frazier-type air permeability tester as shown in FIG. Specifically, after preparing test pieces each having a length of 180 mm in width and length, the test pieces were attached to the test piece installation place shown in FIG. 10. Adjust the suction fan so that the inclined barometer shows a pressure of 12.7 mm by means of an accelerometer, and then calculate the amount of air that has passed through the test piece from the pressure and type of air orifice indicated by the vertical barometer. From this, the open cell rate was measured. The measured open cell rate is the average value of three test pieces made from the same material.

(2) Dynamic elasticity  Coefficient

The dynamic modulus of foam foam used in the test was evaluated by the method specified in KS F 2868.

TABLE 1

Open cell rate (%) thickness ( mm ) material Example  One 80 20   Polyurethane foam Example  2 80 30 Example  3 80 40 Example  4 80 50 Example  5 80 60 Comparative example  One 80 10 Comparative example  2 Closed cell structure 10 Polypropylene foam Comparative example  3 Closed cell structure 20

TABLE 2

Dynamic modulus ( MN / m ³ ) material Example  6 0.9      Polyurethane foam Example  7 1.3 Example  8 1.5 Example  9 2 Example  10 2.3 Example  11 2.6 Example  12 6.6 Example  13 7.6 Example  14 7.9 Comparative example  4 11.5 Comparative example  5 16 Comparative example  6 20.5 Comparative example  7 35.4

Test Example  1: impact sound according to thickness Reduction  effect

Using the foamed foam of Examples 1 to 5 and Comparative Examples 1 to 3 was measured the impact sound reduction effect according to the thickness and material changes. Specifically, after measuring the bottom impact sound (A) and the bottom impact sound (B) after the construction when no foam foam was constructed on the concrete base, the impact sound reduction amount (C) was evaluated according to the following formula (1). The bottom impact sound was measured according to the method specified in KS F 2810-2.

Equation (1): Reduction of impact sound (C) = floor value before construction (A)-measurement value after construction (B)

The impact sound reduction effect according to the thickness and / or material changes measured by the above method is shown in Table 3 below.

TABLE 3

Shock Reduction  ( dB ) Example  One One Example  2 4 Example  3 10 Example  4 14 Example  5 16 Comparative example  One -One Comparative example  2 -4 Comparative example  3 -3

From the results of Table 3, while the thickness of the polyurethane foam is Examples 1 to 5 included in the scope of the present invention shows an excellent impact sound reduction effect, even when using the same polyurethane foam, the thickness of the present invention In the case of Comparative Example 1, which falls short of the range, it was found that there was no impact sound reduction effect. In addition, from the comparative results of Comparative Examples 1 and 2 and Comparative Examples 2 and 1, it was found that the case where the polyurethane foam was used when the other conditions were the same showed a remarkably excellent impact sound reduction effect in other cases. .

Test Example  2: open On cell rate  Impact sound Reduction  effect

Except that the open cellization rate was about 60%, other conditions such as thickness and hardness were prepared in the same polyurethane foam as in Example 2, and the impact sound reduction effect was measured in the same manner as in Test Example 1.

As a result, in the case of foam foam having an open cellization rate of 60%, the impact sound reduction amount was 2 dB, but in Example 2, it was 4 dB. It was found to rise.

Test Example  3: Dynamic elasticity  Impact sound according to coefficient Reduction  effect

Using the foams of Examples 6 to 14 and Comparative Examples 4 to 7 and the impact sound reduction effect on the change in the dynamic elastic modulus was measured in the same manner as in Test Example 1, the results are shown in Table 4 below.

TABLE 4

Shock Reduction  ( dB ) Example  6 13 Example  7 16 Example  8 15 Example  9 11 Example  10 6 Example  11 8 Example  12 3 Example  13 2 Example  14 One Comparative example  4 -2 Comparative example  5 -3 Comparative example  6 -2 Comparative example  7 -4

As can be seen from the results of Table 4, in Examples 6 to 14 according to the present invention, the impact sound reduction effect was remarkably excellent compared to Comparative Examples 4 to 7. In addition, when comparing the results of Examples 6 to 9 and the results of Examples 10 to 14, it can be seen that the impact sound reduction effect is more excellent when the value of the dynamic modulus is 2 MN / m ³ or less.

1 is a scanning electron micrograph (SEM) of a polyurethane foam foam used in the examples of the present invention.

2 is a cross-sectional view of an interlayer sound insulating material according to an aspect of the present invention.

3 is a cross-sectional view of an interlayer sound insulating material according to another aspect of the present invention.

4 is a cross-sectional view of an interlayer sound insulating material according to another aspect of the present invention.

5 is a cross-sectional view of an interlayer sound insulating material according to another aspect of the present invention.

6 is a cross-sectional view of an interlayer sound insulating material according to another aspect of the present invention.

7 is a cross-sectional view of an interlayer sound insulating material according to another aspect of the present invention.

8 is a cross-sectional view of an interlayer sound insulating material according to another aspect of the present invention.

9 is a cross-sectional view showing a state of use of the interlayer sound insulating material according to one aspect of the present invention.

10 is a diagram showing a Frazier-type air permeability tester used for the measurement of open cellization rate.

<Description of Drawing>

10: polyurethane foam 15: open cell

20: dimensionally stable layer 30: waterproof layer

40: heat insulating material 45: irregularities

46: buffer opening 50: board

100: interlayer sound insulation

Claims (15)

It is applied to the floor structure in which slabs, interlayer sound insulation, concrete and mortar layers are sequentially installed from the bottom, Flexible polyurethane foams containing open cells, having a thickness of at least 15 mm, a hardness of 5 to 22 Kgf / cm ² , and a density of 10 to 25 Kg / m ³ ; And An interlayer sound insulating material comprising a functional layer formed on one or both sides of the polyurethane foam. The method of claim 1, An interlayer sound insulation material, characterized in that the open cell ratio of polyurethane foam is 60% or more. The method of claim 1, An interlayer sound insulation material, characterized in that the open cell ratio of polyurethane foam is 80% or more. The method of claim 1, An interlayer sound insulating material, wherein the polyurethane foam has a thickness of 60 mm or less. The method of claim 1, An interlayer sound insulation material, characterized in that the dynamic elastic modulus of the polyurethane foam is 0.5 to 10 MN / m ³ . delete delete The method of claim 1, The functional layer is an interlayer sound insulating material, characterized in that at least one selected from the group consisting of a dimensionally stable layer, a waterproof layer, a heat insulating material layer and a reinforcing board layer. The method of claim 8, The dimensionally stable layer is glass fiber; Synthetic resin film; And one or more kinds selected from the group consisting of a woven or nonwoven fabric made of natural or synthetic fibers. The method of claim 8, Waterproof layer is an impermeable synthetic resin film; Woven fabric impregnated or coated with a synthetic resin; And one or more kinds selected from the group consisting of non-woven fabrics impregnated or coated with synthetic resins are laminated or bonded. The method of claim 8, Insulation material is a synthetic resin foam sheet; Glass wool; Rock wool; Mineral wool; And laminated or bonded one or more kinds selected from the group consisting of woven fabrics. The method of claim 8, Reinforcement board is plastic board; Weapon mode; Wood plywood; Wood powder crimp board; And a kind or two or more kinds selected from the group consisting of wood flour and inorganic mixing boards are laminated or bonded. The method of claim 1, Interlayer sound insulating material, characterized in that the irregularities are formed on at least one surface or both surfaces selected from the group consisting of a polyurethane foam foam and a functional layer. A method of floor construction comprising the step of constructing an interlayer sound insulating material according to any one of claims 1 to 5 or 8 to 13 on a slab. The method of claim 14, Floor construction method further comprises the step of sequentially constructing the concrete layer, mortar layer and floor finish on the interlayer sound insulation material constructed.

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