JPH06288072A - Soundproofing floor backing material - Google Patents

Abstract

PURPOSE:To obtain a high soundproofing performance by molding integrally a mixture layer which comprises foaming synthetic resin particles and a high density soft sheet on the rear side of a plane soft material. CONSTITUTION:A mixture layer B, which comprises foaming synthetic resin particles and an inorganic binder, such as cement, are laminated on a wooden group plane basic material A, such as plywood or hard board. A synthetic rubber or vinyl chloride or the like and high specific gravity inorganic substance are kneaded into a high density soft sheet C, which is pasted integrally, thereby forming a soundproofing under floor backing material D. It is, therefore, possible to prevent impact sound or noise generated upstairs from traveling downstairs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof floor base material for preventing impact sound and propagation sound generated on the floor of a building from being transmitted to the downstairs.

[0002]

2. Description of the Related Art In high-rise and middle-rise reinforced concrete houses, impact sounds such as walking noises and falling sounds generated on the upper floors are transmitted to the lower floors, which are unpleasant to the inhabitants of the lower floors. In particular, wooden condominiums are inferior in soundproofing performance to reinforced concrete houses and have many problems. The most effective method to prevent this unpleasant noise is to use a material with a large weight per unit area and high rigidity for the floor base, as in reinforced concrete houses even in wooden houses, but In a wooden house, the material used and the floor set made of it have low rigidity, and there are many problems in terms of construction such as cutting on site, and such a material cannot be used. Therefore, it was difficult to solve the soundproofing problem.

Therefore, as a method of preventing this unpleasant sound, a floor material such as a rubber-based material having a high density and a soft sheet on a floor substrate such as plywood or a composite material of a wooden floor material and a soft sheet has been proposed. There is.

[0004]

However, although the above-mentioned soft sheet has excellent sound insulation performance against propagation sound, it is not so effective against floor impact sound due to lack of rigidity, and construction efficiency and cost are low. In terms of, it was not satisfactory either.

An object of the present invention is to provide a soundproof floor base material which has a sufficient shielding performance not only for propagating sound generated on the floor but also for impact sound in a wooden house, and is excellent in workability and cost. Is provided.

[0006]

[Means for Solving the Problems] As a result of intensive studies to solve the above problems, the following floor base material having a high rigidity and a soundproofing property that can be easily cut on site is used for a wooden floor assembly. By laying on the floor base material and sticking the wooden floor material on the floor base material by a known method, the impact sound transmitted to the downstairs could be significantly reduced.

As shown in FIG. 1, the floor base material described above includes a flat base material (A), a mixture layer (B) made of a mixture of expanded synthetic resin particles and an inorganic binder, and a high density soft sheet. (C) and 3 layers. The first layer of wood-based flat substrate is
Planar substrates for construction such as plywood, hardboard, particle board, and wood wool cement board can be used. A thickness of 3 mm to 12 mm can be used, but a thickness of 5 mm to 10 mm is preferable in terms of cost and performance.

The expanded synthetic resin particles of the mixture layer of the second layer have an average major axis and minor axis of 0.2 mm to 10 mm, and have a relatively spherical or elliptical spherical shape in which the difference between the major axis and the minor axis is within 3 times. A close shape is suitable. As for the expansion ratio, the independent foaming resin particles in the range of 10 to 50 times are suitable. As the type of synthetic resin, polystyrene resins, urea resins, styrene resins, phenol resins, polyethylene resins, polypropylene resins, urethane resins, vinyl chloride resins and the like, which are generally used as foaming resins, can be used. As the inorganic binder, ordinary Portland cement, quick-setting cement, gypsum and the like can be used. Further, in order to impart flexibility to the mixture layer or to impart fluidity to the mixture to facilitate formation of the mixture layer, synthetic resin emulsion, synthetic rubber latex, etc. are added within a range of 20% by weight of solid content. It can also be mixed.

The high density soft sheet is made by kneading a synthetic rubber type, vinyl chloride type, urethane type, polyethylene type resin or the like and a high specific gravity inorganic substance such as manganese oxide, iron oxide, silicon oxide, aluminum oxide, calcium oxide or magnesium oxide. A sheet having a thickness of 2 to 5 mm is suitable.

Hereinafter, the present invention will be described in detail based on examples, but the present invention is not limited thereto.

[0011]

EXAMPLE 2 Acrylic emulsion (trade name, Taffec No. 200, manufactured by Sanyo Kokusaku Pulp Co., Ltd.) was used as an adhesion aid for a plywood (A) having a thickness of 5.5 mm and a mixture layer.
50 g / m ^{2 was} applied, and a mixture having the composition shown in Table 1 below was uniformly sprayed to a thickness of 4.5 mm using a continuous liching gun, and dried and solidified at room temperature for 24 hours.

[0012] After drying and solidification, thickness 3.1mm, areal density 7.53k
A high-density soft sheet (C) composed of polyvinyl chloride of g / m ² and an inorganic filler is adhered using Esdyne # 5660 (adhesive manufactured by Sekisui Chemical Co., Ltd.) to obtain a soundproof floor base material of the present invention. It was The areal density of this floor base material was measured and found to be 11.2 kg / m ² .

Next, the soundproof floor base material (D) obtained as described above, with the high-density soft sheet facing down, has a thickness of 12 mm.
Epoxy resin adhesive (manufactured by Konishi Co., Ltd., product name:
E-350R) and a screw nail having a length of 35 mm were used in combination. Furthermore, a flooring (G) having a thickness of 12 mm was stuck on the floor base material with a floor adhesive (product name: CK-11) manufactured by Konishi Co., Ltd. (see FIG. 2). Wooden floor set,
Width 120 mm x height 300 mm pine beams are spaced 1,80
Assembled with 0mm, thickness 105mm, width 45mm on it
The floor joists are assembled perpendicularly to the beams at intervals of 303 mm.

With the flooring attached, the floor impact sound level was measured according to the measuring method of JASA1418 (JISA).
Instead of the concrete slab specified in the measuring method of 1418, the above wooden floor set is adopted. Others were measured under the same conditions as the measuring method of JISA1418), and the lightweight floor impact sound insulation performance was L72 and the heavy floor impact sound insulation performance was L61.
Similarly, when the sound transmission loss was measured according to the measuring method of JIS A1416, it was found to be 36 at a center frequency of 500 Hz.
It was dB.

[0015]

[Comparative Example 1] A 12 mm flooring (G) having the same quality and thickness as that used in the example was attached to the wooden floor set of the example by the same method as the example (see FIG. 3), and the same method as the example. According to the measurement of the floor impact sound level and the sound transmission loss, the lightweight floor impact sound insulation performance was L81, the heavy floor impact sound insulation performance was L72, and the sound transmission loss was 22 dB at the center frequency of 500 Hz.

[0016]

[Comparative Example 2] A high-density rubber mat having a thickness of 12 mm and an areal density of 14.5 kg / m ² (trade name:
A sound insulation panel SP-12, manufacturer name: Sunpot Co., Ltd.) was attached with the floor adhesive used in the examples, and the flooring (G) of the same quality and the same thickness as those used in the examples.
Was applied in the same manner as in the example (see FIG. 4). When the floor impact sound level and the sound transmission loss were measured by the same method as in the example, the lightweight floor impact sound insulation performance was L75, the heavy floor impact sound insulation performance was L70, and the sound transmission loss was 29 dB at the center frequency of 500 Hz. Met.

[0017]

[Advantages] Tables 2 and 3 below summarize the measurement results of the examples and comparative examples. In the example and the comparative example 2, the same method was applied, and the total thickness of the floor material was only 1.1 m.
In comparison with the surface density of the rubber mat of Comparative Example 2 of 14.5 kg / m ² , the surface density of the floor base material of the Example is 11.2 kg / m ^2, which is smaller than that of the rubber mat of Comparative Example 2. Despite being low, there was a significant difference in light and heavy floor impact sound insulation performance and sound transmission loss.

That is, in Comparative Example 2, by laminating a rubber mat between the plywood of the flooring material of Comparative Example 1 and the flooring, the impact sound of light weight and impact noise of Comparative Example 1 are 6 dB and 2 dB, respectively. Although only the improvement of the sound insulation performance was achieved, in the embodiment, the performance was also improved by 9 dB and 11 dB, respectively, and the insulation performance was remarkably improved as compared with Comparative Example 2. Also in terms of sound transmission loss, as shown in Table 3 below, a significant improvement in sound insulation performance is seen as compared with Comparative Example 2.

Thus, the remarkable improvement of the embodiment of the present invention is that the soundproof floor base material used in the embodiment is plywood,
The three layers, a mixture layer composed of expanded synthetic resin particles and an inorganic binder, and a high-density soft sheet are combined and integrated, and the rigidity is increased, so that the vibration of the floor structure caused by heavy impact is suppressed, This is because floor impact noise is improved by shifting the vibration transmitted to the downstairs to the low frequency side. In addition, propagating sound such as light-weight floor impact sound, which mainly consists of vibrations in a high frequency range, is deprived of vibration energy at each interface when passing through a mixture layer of expanded synthetic resin particles and an inorganic bond, resulting in higher density softness. The vibration damping action of the seat portion suppresses the propagation of the floor impact sound, thereby effectively blocking the vibration in the high frequency region.

On the other hand, the rubber mat in Comparative Example 2 has a high areal density, but since it is a simple substance made of a soft material, it has a low rigidity, so that it is not possible to effectively block heavy impact noise, and the mixture in the Examples is also used. Since it does not have a layer-like function, it also cannot effectively block lightweight impact noise. Also regarding sound transmission loss, the soundproof floor base of the example,
The rubber mat of Comparative Example 2 has three layers and has a resistance material sandwich panel structure in terms of sound insulation, so that coincidence is less likely to occur, so that it exhibits a greater value of the blocking performance than a transmission loss according to the normal mass rule. Despite the lower areal density, the sound transmission loss showed a higher value.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a soundproof floor base material according to the present invention.

FIG. 2 is a cross-sectional view of a floor used in a test of an example.

FIG. 3 is a cross-sectional view of a floor used in a test of Comparative Example 1.

FIG. 4 is a cross-sectional view of a floor used in a test of Comparative Example 2.

[Explanation of symbols]

 A Plywood with a thickness of 5.5 mm B Mixture layer C High-density soft sheet D Soundproof floor base material according to the present invention E Plywood with a thickness of 12 mm F Rubber mat G Flooring

Claims (1)

[Claims] 1. A soundproof floor base material comprising a flat base material such as plywood, a mixture layer made of a mixture of expanded synthetic resin particles and an inorganic binder, and a high-density soft sheet, which are successively adhered and integrated by an adhesive. .