JP2002364111A - Vibration control soundproof floor structural body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control soundproof floor structural body capable of developing an excellent vibration control soundproof performance without increasing a thickness and a weight. SOLUTION: In this vibration control soundproof floor structural body, a flooring, a vibration control soundproof material A (desirably 1 to 4 in specific gravity), a vibration control soundproof material B (desirably 0.01 to 0.3 in specific gravity), and a floor backing material C are stacked in this order from a floor finish material side. The acoustic specific resistance value Zb of the vibration control soundproof material B meets the requirements of the following two expressions. |Za-Zb|>3×10<5> ... expression (1) |Zc-Zb|>3×10<5> ... expression (2) Where Za is the acoustic specific resistance value of vibration control soundproof material A, Zb is the acoustic specific resistance value of vibration control soundproof material B, and Zc is the acoustic specific resistance value of the floor backing material C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration-damping sound-insulating floor structure suitable for use on the floor of a house for soundproofing a house or the like.

[0002]

2. Description of the Related Art In recent years, due to the increase of wooden floors and multi-family houses, demands for floor noise prevention on lower floors in apartment houses and general private houses have been increasing. In order to prevent such floor noise, in recent years, a structure using a vibration damping soundproofing material or the like has been used between a floor below the upper floor and a ceiling below the floor.

As the above vibration damping and soundproofing material, for example,
No. 65777 discloses a vibration damping sound insulating sheet in which slag, asphalt or rubber asphalt and an additive (talc, gypsum, etc.) are kneaded and formed into a plate shape, and a fiber such as a nonwoven fabric is adhered to the surface. Further, as a soundproof flooring material in which a foam is laminated on a base material having a high specific gravity, JP-A-64-90360
In the gazette, the surface layer is made of a composite plate made of a vulcanized foam rubber sheet containing iron powder and the like, and the lower layer is made of a plate-like body obtained by adding iron powder and the like to asphalt, and between the surface layer and the lower layer. In which a cushioning material is interposed.

[0004]

However, according to the study of the present inventor, regarding the above-disclosed one,
In any case, the vibration damping and soundproofing performance is not always sufficient, and in order to further improve the performance, it is necessary to increase the thickness of the vibration damping soundproofing material and increase the specific gravity, and therefore the weight of the vibration damping soundproofing material is too heavy Thus, there is a problem that the workability is deteriorated, and the performance such as the load resistance of the vehicle body (house) is adversely affected.

[0005] In view of the above-mentioned problems of the conventional soundproofing materials, an object of the present invention is to provide a method without increasing the thickness or weight significantly.
An object of the present invention is to provide a vibration-damping sound-insulating floor structure capable of exhibiting excellent vibration-damping and sound-insulating performance.

[0006]

According to the first aspect of the present invention, the vibration-damping and sound-insulating floor structure is laminated in the order of flooring, a vibration-damping and sound-insulating material A, a vibration-damping and sound-insulating material B, and a floor base material C from the floor finishing material side. A vibration-damping and sound-insulating floor structure, wherein the acoustic specific resistance (Zb) of the vibration-damping and sound-insulating material B satisfies the following two equations. | Za−Zb |> 3 × 10 ⁵ Equation (1) | Zc−Zb |> 3 × 10 ⁵ Equation (2) where Za: the acoustic specific resistance of the vibration damping and soundproofing material A ( Z) Zb: Acoustic resistivity value of the vibration damping and soundproofing material B (Z) Zc: Acoustic resistivity value of the floor base material C (Z) where Z = (E × ρ) ^0.5 Z: Acoustic resistivity value (unit: kg / m ² · s) E: modulus of elasticity (unit: Pa) ρ: density (unit: kg / m ³ )

According to a second aspect of the present invention, there is provided a vibration-damping and sound-insulating floor structure according to the first aspect, wherein the specific gravity of the vibration-damping and sound-insulating material A is 1 to 4, and The specific gravity of B is 0.0
1 to 0.3.

Hereinafter, the present invention will be described in detail. The flooring in the present invention is not particularly limited as long as it is generally used as a floor finishing material.For example, a single wood-based material, a laminate of wood-based sheets, and compression of a chip material such as wood or paper can be used. Examples thereof include an integrated product, a product obtained by compressing and integrating wood fibers (fiber board), a product made of resin, and a product obtained by laminating a surface decorative board on these.

The vibration-damping and sound-insulating material A in the present invention is not particularly limited, and examples thereof include a vibration-damping and sound-insulating material containing resin, rubber, asphalt and the like. The resin is not particularly limited, but is preferably a thermoplastic resin,
For example, vinyl chloride resin, polypropylene, polyethylene, acrylic resin and the like are preferably used.

As the above rubber, for example, natural rubber, S
BR (styrene butadiene rubber), NBR (nitrile rubber), CR (chloroprene rubber), BR (butadiene rubber), IR (isoprene rubber) and the like. As the asphalt, for example, natural asphalt,
Petroleum asphalt such as straight asphalt, blown asphalt and cutback asphalt can be used. The above resin, rubber, asphalt, etc.
They may be used alone or in combination of two or more. These resins, rubbers, asphalts and the like may be blended with a plasticizer for adjusting viscosity, a processing aid such as a thickener and a gelling agent, a pigment, and the like.

It is preferable that a high specific gravity filler is mixed with these resins, rubber, asphalt and the like in order to improve the vibration damping and soundproofing performance. The high specific gravity filler is preferably a filler having a specific gravity of 2 or more, more preferably 4 or more. If the specific gravity is less than 2, sufficient vibration-damping and sound-insulating properties may not be obtained. As the high specific gravity filler,
For example, iron sand, iron powder, iron oxide, calcium carbonate, zircon sand, chromite sand, iron slag powder, silica sand, lead powder, tin oxide, zinc oxide, barium sulfate, iron sulfide, mica, aluminum hydroxide, talc, clay, etc. Is used.

As the properties of the high specific gravity filler, for example, any of powder, fibrous, and flake-like properties can be used. Is preferred. The particle size of the high specific gravity filler is not particularly limited, but if it is too large, uniform mixing is difficult, and the performance of the obtained vibration damping and soundproofing material tends to be uneven, so that it is preferably 2 mm or less. More preferably 5-500μ
m. These high specific gravity fillers may be used alone or in combination of two or more.

The thickness of the vibration-damping and sound-insulating material A is not particularly limited, but if it is too thin, the vibration-damping and sound-insulating properties become insufficient, and if it is too thick, the weight becomes too heavy, the workability deteriorates, and the building (housing) Is usually 1 to 20 mm, preferably 2 to 12 mm, and more preferably 3 to 20 mm.
10 mm. The specific gravity of the vibration-damping and sound-insulating material A is preferably from 1 to 4, and more preferably 1. from the viewpoint of the balance between the vibration-damping and sound-insulating properties and the workability, as in the case of the thickness described above.
5 to 3.5.

In the vibration damping and soundproofing material A, the resin, rubber,
When asphalt or the like and a high specific gravity filler are blended, usually, a high specific gravity filler of 90 to 70% by weight is mixed with a total amount of resin, rubber, asphalt and the like of 10 to 30% by weight.

The vibration-damping and sound-insulating material B according to the present invention has an acoustic specific resistance (Zb) satisfying the following two equations. | Za−Zb |> 3 × 10 ⁵ ··· (1) | Zc−Zb |> 3 × 10 ⁵ ··· (2) where Za: the acoustic specific resistance of the vibration damping and soundproofing material A Zb : Acoustic specific resistance of vibration damping and soundproofing material B Zc: Acoustic specific resistance of floor covering material C

When | Za−Zb | is smaller than 3 × 10 ⁵ , the vibration from the vibration-damping and sound-insulating material A to the vibration-damping and sound-insulating material B is easily transmitted, so that it is difficult to obtain the vibration damping and soundproofing performance. Similarly, when | Zc−Zb | is smaller than 3 × 10 ⁵ , the vibration from the vibration-damping and sound-insulating material B to the floor base material C is easily transmitted, so that it is difficult to obtain the vibration-damping and sound-insulating performance.

The vibration-damping and sound-insulating material B is not particularly limited as long as the acoustic specific resistance (Zb) satisfies the above-mentioned conditions, and examples thereof include a resin foam and a nonwoven fabric.
As the resin foam, for example, ethylene-vinyl acetate copolymer, polyethylene, polypropylene, polyurethane, polyvinyl chloride resin, polystyrene, vinylon,
Foams such as nylon, phenolic resin, and fluororesin may be used, and these may be used alone, or two or more kinds may be used as a mixture or laminated.

The non-woven fabric is preferably a non-compressed felt-like or cotton-like sheet, such as a spun-bonded non-woven fabric. The material of the nonwoven fabric is preferably made of synthetic fibers, and examples of the synthetic fibers include fibers of nylon, polyester, polyethylene, polypropylene, acrylic resin, and the like.

The thickness of the vibration-damping and sound-insulating material B is preferably 2 to 30 mm, more preferably 3 to 20 mm. When the thickness is less than 2 mm, the vibration is easily transmitted because the thickness is too thin, and the vibration-damping and sound-insulating properties become insufficient. When the thickness exceeds 30 mm, it becomes difficult to finish the floor. The specific gravity of the vibration damping soundproof material B is
0.01 to 0.3, preferably 0.05 to
More preferably, it is 0.2. If the specific gravity is too small, the floor is likely to be deformed, and if it is too large, vibrations are easily transmitted, and the vibration damping and soundproofing properties are insufficient.

The vibration-damping and sound-insulating materials A and B in the present invention may be used by appropriately laminating a nonwoven fabric, a paper material, a film, and the like, as necessary, in order to further improve the handleability and workability. .

The method of measuring the elastic modulus (E) used for calculating the acoustic resistivity (Z) in the present invention is described in JIS K717.
1. If the above measurement is difficult, JI
It may be based on SK7113.

The floor base material C in the present invention is not particularly limited, and for example, plywood, particle board, insulation board, hard board, gypsum board, slate board, and a composite board thereof are preferably used.

As a method for constructing the vibration-damping and sound-insulating floor structure of the present invention, for example, a vibration damping sound-insulating material B is constructed on a floor base material C,
A method of constructing the vibration-damping and sound-insulating material A thereon and further applying a flooring thereon as a floor finishing material is adopted. At this time, the above-mentioned materials may be appropriately bonded together using an adhesive or a pressure-sensitive adhesive, or may be simply superposed.

(Operation) The vibration-damping and sound-insulating floor structure of the present invention is laminated from the floor finishing material side in the order of flooring, vibration-damping and sound-insulating material A, vibration-damping and sound-insulating material B, and floor base material C. Since the acoustic specific resistance value of B satisfies the specific relational expressions (1) and (2) with the acoustic specific resistance values of the damping soundproofing material A and the floor covering material C, the floor impact sound given to the flooring is damped. By reducing the vibration-proof and sound-insulating material A using the vibration-damping and sound-insulating effects and arranging the vibration-damping and sound-proofing material B at a lower position, vibrations that cannot be suppressed by the vibration-damping and sound-proofing material A are not easily transmitted to the vibration-damping and sound-proofing material B Furthermore, it is considered that vibrations that could not be suppressed by the vibration-damping and sound-insulating material B can be hardly transmitted to the floor base material C, and a large vibration insulating effect can be obtained. When the specific gravity of the vibration-damping and sound-insulating material A is 1 to 4 and the specific gravity of the vibration-damping and sound-insulating material B is 0.01 to 0.3, the above-described effect can be achieved more reliably.

[0025]

EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples. The present invention is not limited only to the following examples. <Vibration damping soundproofing material A> In the following examples, vibration damping soundproofing material A
As blown asphalt (specific gravity: 1.0), iron oxide powder (specific gravity: 4.5), calcium carbonate (specific gravity: 2.6)
Asphalt vibration-damping material (Sekisui Chemical Co., Ltd.)
The product name was “Bibless Floor Sheet”. The vibration-damping and sound-insulating material A is made of a polyester resin nonwoven felt (60 g /
m ² ).

<Preparation of vibration-damping and sound-insulating floor structure> Using the materials shown in the following Examples and Comparative Examples, a vibration-damping and sound-insulating material B was put on a floor base material C, and a vibration damping and sound-insulating material A was placed thereon. The pieces were put on each other and then laminated, and furthermore, a flooring was laminated and laminated thereon via a double-sided adhesive tape. A double-sided adhesive tape having a width of 50 mm was used at a pitch of 300 mm. Other materials were merely placed on top of each other, and fixed from the tongue portion of the flooring to the base material using a 45 mm finish nail as in a general construction method, to produce a vibration-damping soundproof floor structure. Although the floor structure of the comparative example does not satisfy the above-described formulas (1) and (2), the expression of the vibration-damping and sound-insulating material A and the vibration-damping and sound-insulating material B follows the lamination order specified in the claims. Shall be used.

(Example 1) (1) Flooring: MDF (medium density fiberboard), thickness 1
2 mm (2) Vibration damping material A: thickness 6 mm, specific gravity 2.8 [density (ρ) 2800 kg / m ³ ], elastic modulus (E) 1.9 × 1
0 ⁸ Pa, the acoustic resistivity ^{(Za) 7.3 × 10 5 kg} / m
² · s (3) Vibration damping material B: Mixed foam of polyethylene and polypropylene, thickness 8 mm, specific gravity 0.1 [density (ρ)
100 kg / m ³ ], an elastic modulus (E) of 2.3 × 10 ⁷ Pa,
Acoustic resistivity (Zb) 0.5 × 10 ⁵ kg / m ² · s (4) Floor base material C: particle board, thickness 15 m
m, specific gravity 0.7 [density (ρ) 700 kg / m ³ ], elastic modulus (E) 3.5 × 10 ⁸ Pa, acoustic resistivity (Zc)
5.0 × 10 ⁵ kg / m ² · s In the first embodiment, | Za-Zb | = 6.8 × 10 ⁵ kg / m ² · s | Zc-Zb | = 4.5 × 10 ⁵ kg / M ² · s.

(Example 2) (1) Flooring: MDF (medium density fiberboard), thickness 1
2 mm (2) Vibration damping material A: thickness 8 mm, specific gravity 2.8 [density (ρ) 2800 kg / m ³ ], elastic modulus (E) 1.9 × 1
0 ⁸ Pa, acoustic specific resistance (Za) 7.3 × 10 ⁵ kg / m
² · s (3) Vibration-damping and sound-insulating material B: urethane foam (thickness 3 mm) laminated on vibration-damping and sound-insulating material B of Example 1, thickness 11
mm, specific gravity 0.1 Density ^{(ρ) 100kg / m 3]} , the elastic modulus ^{(E) 2.0 × 10 7 Pa} , the acoustic resistivity (Zb)
0.4 × 10 ⁵ kg / m ² · s (4) Floor base material C: particle board, thickness 15 m
m, specific gravity 0.7 [density (ρ) 700 kg / m ³ ], elastic modulus (E) 3.5 × 10 ⁸ Pa, acoustic resistivity (Zc)
5.0 × 10 ⁵ kg / m ² · s In the second embodiment, | Za−Zb | = 6.9 × 10 ⁵ kg / m ² · s | Zc−Zb | = 4.6 × 10 ⁵ kg / M ² · s.

(Example 3) (1) Flooring: MDF (medium density fiberboard), thickness 1
2 mm (2) vibration deadening A: thickness 6 mm, specific gravity 2.8 Density ^{(ρ) 2800kg / m 3]} , the elastic modulus (E) 1.9 × 1
0 ⁸ Pa, acoustic specific resistance (Za) 7.3 × 10 ⁵ kg / m
² · s (3) Vibration damping soundproof material B: polyester nonwoven felt, thickness 5 mm, specific gravity 0.15 [density (ρ) 150 kg /
m ³ ], modulus of elasticity (E) 5.5 × 10 ⁷ Pa, specific acoustic resistance (Zb) 0.9 × 10 ⁵ kg / m ² · s (4) Base material C: particle board, thickness 15 m
m, specific gravity 0.7 [density (ρ) 700 kg / m ³ ], elastic modulus (E) 3.5 × 10 ⁸ Pa, acoustic resistivity (Zc)
5.0 × 10 ⁵ kg / m ² · s In the third embodiment, | Za-Zb | = 6.4 × 10 ⁵ kg / m ² · s | Zc-Zb | = 4.1 × 10 ⁵ kg / M ² · s.

(Comparative Example 1) Damping soundproofing material A and damping soundproofing material B
And the same material, and were as follows. (1) Flooring: Same as in Example 2. (2) Damping soundproofing material A: Same as in Example 2. (3) Damping soundproofing material B: The vibration damping soundproofing material A of Example 2 was used. (4) Floor C: Same as in Example 2. In Comparative Example 1, | Za−Zb | = 0.0 × 10 ⁵ kg / m ² · s | Zc−Zb | = 2.3 × 10 ⁵ kg / m ² · s

Comparative Example 2 The vibration damping and soundproofing materials A and B of Example 2
Were used interchangeably and were as follows. (1) Flooring: Same as in Example 2. (2) Damping soundproofing material A: The vibration damping soundproofing material B of Example 2 was used. (3) Damping soundproofing material B: The vibration damping soundproofing material A of Example 2 was used. (4) Floor C: Same as in Example 2. In this comparative example 2, | Za-Zb | = 6.9 × 10 ⁵ kg / m ² · s | Zc-Zb | = 2.3 × 10 ⁵ kg / m ² · s

Comparative Example 3 The vibration damping and soundproofing materials A and B of Example 3
Were used interchangeably and were as follows. (1) Flooring: Same as in Example 3. (2) Damping soundproofing material A: The vibration damping soundproofing material B of Example 3 was used. (3) Damping soundproofing material B: The vibration damping soundproofing material A of Example 3 was used. (4) Floor base material C: Same as in Example 3. In this comparative example 3, | Za-Zb | = 6.4 × 10 ⁵ kg / m ² · s | Zc-Zb | = 2.3 × 10 ⁵ kg / m ² · s

<Evaluation of vibration-damping and sound-insulating properties> A light floor impact sound performance test was conducted on the vibration-damping and sound-insulating floor members obtained as described above. As a test method, a lightweight floor impact sound level was measured by a measurement method and a sound insulation class in accordance with JIS A1418. Tables 1 and 2 show the measurement results of the material configurations and the lightweight floor impact sound levels of the examples and comparative examples.

[0034]

[Table 1]

[Table 2] In the evaluation of vibration damping and soundproofing with a light floor impact sound, the measurement levels at 250 Hz and 500 Hz relate to the overall acoustic performance. Therefore, in the embodiment of the present invention shown in Table 1, the measurement level in this area is low (noise level). Level is low), it was found to be excellent in vibration damping and soundproofing performance.

[0035]

As described above, the vibration-damping and sound-insulating floor structure of the present invention has a flooring, a vibration-damping and sound-insulating material A, a vibration-damping and sound-insulating material B, and a floor base material C which are laminated in this order from the floor finishing material side. The acoustic specific resistance (Zb) of the vibration-damping and sound-insulating material A and the floor base material C satisfies the specific relational expressions (1) and (2).
Due to the acoustic resistance of each member of the vibration-damping and sound-insulating material A, the vibration-damping and sound-insulating material B, and the floor base material C, the vibration propagation such as the light floor impact sound is suppressed,
Excellent vibration and sound insulation performance can be demonstrated. The specific gravity of the vibration damping and soundproofing material A is 1 to 4 and the specific gravity of the vibration damping and soundproofing material B is 0.01 to 4
When it is 0.3, the above effect can be more reliably achieved. As a result, without significantly increasing the thickness and weight,
Excellent workability, does not adversely affect the vehicle (house),
A vibration-damping sound-insulating floor structure can be provided.

Claims (2)

[Claims] 1. A vibration-damping and sound-insulating floor structure in which a flooring, a vibration-damping and sound-insulating material A, a vibration-damping and sound-insulating material B, and a floor base material C are laminated in this order from the floor finishing material side. A vibration-damping sound-insulating floor structure wherein the acoustic specific resistance (Zb) satisfies the following two equations. | Za−Zb |> 3 × 10 ⁵ Equation (1) | Zc−Zb |> 3 × 10 ⁵ Equation (2) where Za: the acoustic specific resistance of the vibration damping and soundproofing material A ( Z) Zb: Acoustic resistivity value of the vibration damping and soundproofing material B (Z) Zc: Acoustic resistivity value of the floor base material C (Z) where Z = (E × ρ) ^0.5 Z: Acoustic resistivity value (unit: kg / m ² · s) E: modulus of elasticity (unit: Pa) ρ: density (unit: kg / m ³ ) 2. The vibration damping and soundproofing material according to claim 1, wherein the specific gravity of the vibration damping soundproofing material A is 1 to 4 and the specific gravity of the vibration damping soundproofing material B is 0.01 to 0.3. Floor composition.