JP2838872B2 - Soundproof flooring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound-insulating floor base material for preventing an impact sound or a propagating sound generated on a floor of a building from being transmitted downstairs.

[0002]

2. Description of the Related Art In a high-rise or medium-rise house made of reinforced concrete, an impact sound such as a walking sound or a dropping sound generated on the floor is transmitted downstairs, which is unpleasant sound for residents downstairs. In particular, wooden apartment houses are inferior in soundproofing performance to reinforced concrete houses and have many problems. The most effective way to prevent this unpleasant noise is to use a material with a large weight per unit area and high rigidity for the floor base, like a reinforced concrete house in a wooden house. In a wooden house, the materials used and the rigidity of the floor set formed therefrom are low, and there are many problems in terms of construction such as cutting at the site, and such materials cannot be adopted. Therefore, it was difficult to solve the soundproofing problem.

Accordingly, as a method for preventing this unpleasant sound, a high-density soft sheet such as a rubber-based material on a floor base such as plywood or a floor material in which a soft sheet is combined with a wooden floor material has been proposed. I have.

[0004]

However, the above-mentioned soft sheet is excellent in sound insulation performance against transmitted sound, but lacks rigidity, so that it has little effect on floor impact sound. Was not satisfactory.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a soundproof flooring material for a wooden house which has a sufficient insulation performance against not only propagation noise generated on floors but also impact noise, 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 materials having high rigidity and soundproofing properties that are easy to cut on site are used for wooden floor sets. By laying on a floor substrate and sticking a wooden floor material on the floor substrate by a known method, the impact noise transmitted downstairs could be significantly reduced.

As shown in FIG. 1, the above-described floor base material comprises a flat base material (A), a mixture layer (B) comprising a mixture of foamed synthetic resin particles and an inorganic binder, and a high-density soft sheet. And (C). The first-layer woody planar base material is
Architectural flat substrates such as plywood, hardboard, particleboard, and wood wool cement board can be used. Although a thickness of 3 mm to 12 mm can be used, a thickness of 5 mm to 10 mm is preferable in terms of cost and performance.

[0008] The foamed synthetic resin particles of the mixture layer of the second layer have an average of a major axis and a 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 three times. A close form is suitable. The expansion ratio of the independent foamed resin particles in the range of 10 to 50 times is appropriate. As the kind of the synthetic resin, those generally used as a foamed resin such as polystyrene, urea, styrene, phenol, polyethylene, polypropylene, urethane, and vinyl chloride can be used. As the inorganic binder, ordinary Portland cement, fast-setting cement, gypsum or 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, a synthetic resin emulsion, a synthetic rubber latex, or the like is used in an amount within 20% by solid content weight. It can be mixed.

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

Hereinafter, the present invention will be described in detail with reference to embodiments, but the present invention is not limited thereto.

[0011]

EXAMPLE An acrylic emulsion (trade name: TAFTAC No. 200, manufactured by Sanyo Kokusaku Pulp Co., Ltd.) was used as an adhesive aid for the 5.5 mm thick plywood (A) and the mixture layer.
50 g / m ^{2 was} applied, and a mixture of the following Table 1 was evenly sprayed to a thickness of 4.5 mm using a continuous lysing gun and dried and solidified at room temperature for 24 hours.

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

Next, the sound-insulating floor base material (D) obtained above was placed on a high-density soft sheet on the lower side with a thickness of 12 mm.
Plywood (E) an epoxy resin adhesive on wooden floor sets of structures shown in the following was laid (Konishi Co., Ltd., trade name:
E-350R) and 35 mm long screw nails were used in combination. Further, a flooring (G) having a thickness of 12 mm was stuck on the floor base material with a floor adhesive (trade name: CK-11) manufactured by Konishi Co., Ltd. (see FIG. 2). Wooden floor
Rice pine beams of width 120mm x height 300mm are spaced at intervals of 1,80.
Assembled at 0mm, and on top of it, 105mm thick and 45mm wide
Are installed orthogonally to the beams at intervals of 303 mm.

The floor impact sound level is measured according to the measurement method of JIS A 1418 with the flooring attached.
As a result , the light floor impact sound insulation performance was L72, and the heavy floor impact sound insulation performance was L61. Similarly, JIS A
When the sound transmission loss was measured according to the measurement method of No. 1416, it was 36 dB at a center frequency of 500 Hz.

[0015]

[Comparative Example 1] A 12 mm flooring (G) of the same quality and the same 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 was used. When the floor impact sound level and the sound transmission loss were measured, the light 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 a center frequency of 500 Hz.

[0016]

Comparative Example 2 A high-density rubber mat having a thickness of 12 mm and a surface density of 14.5 kg / m ² (product name: shielding
(Sound panel SP-12, manufacturer: Sunpot Co., Ltd.)
Was attached with the floor adhesive used in the examples, and a flooring (G) having the same quality and the same thickness as those used in the examples was attached in the same manner as in the examples (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 light floor impact sound insulation performance was L75, the heavy floor impact sound insulation performance was L70, and the sound transmission loss was center frequency 5
It was 29 dB at 00 Hz.

[0017]

[Effects] Tables 2 and 3 below summarize the measurement results of the examples and comparative examples. In the example and the comparative example 2, they are stuck by the same method, and the thickness of the whole flooring material is only 1.1 m.
difference m only without, yet as compared with the surface density 14.5 kg / ^{m 2} of rubber mat of Comparative Example 2, the surface density of the underfloor member embodiment is 11.2 kg / ^{m 2,} than 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, the rubber mat was laminated between the plywood of the flooring material of Comparative Example 1 and the flooring, so that a light impact sound and a heavy impact sound of 6 dB and 2 dB were obtained with respect to Comparative Example 1. Although only the improvement of the sound insulation performance was achieved, in the example, 9 dB and 11 dB were respectively improved, and the insulation performance was remarkably improved as compared with Comparative Example 2. As for the sound transmission loss, as shown in Table 3 below, a remarkable improvement in the sound insulation performance as compared with Comparative Example 2 is seen.

As described above, the improvement of the embodiment of the present invention is particularly remarkable because the soundproof flooring base material used in the embodiment is made of plywood,
A mixture layer of foamed synthetic resin particles and an inorganic binder, and three layers of a high-density soft sheet are combined and integrated to increase rigidity. This is because the floor impact noise is improved by shifting the vibration transmitted downstairs to the lower frequency side. Propagation noise mainly composed of high-frequency vibrations, such as light floor impact noise, is deprived of vibration energy at each interface when passing through a mixture layer of foamed synthetic resin particles and inorganic bonds, and further has a high-density softness. The propagation of the floor impact sound is suppressed by the vibration damping action of the seat portion, so that the vibration in the high frequency region is also effectively blocked.

On the other hand, the rubber mat in Comparative Example 2 has a high areal density, but has a low rigidity because it is a simple substance made of a soft material. Since it does not have such a function as a layer, it cannot effectively block light impact noise. Regarding sound transmission loss, the soundproofing floor substrate of the embodiment is
Since it is composed of three layers and has a resistance material sandwich panel structure for sound insulation, it is hard to cause coincidence, so that it shows a large value of the blocking performance as compared with the transmission loss according to the ordinary mass rule, and the rubber mat of Comparative Example 2 Despite the low areal density, the sound transmission loss also showed a high value.

[Table 2]

[Table 3]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a sound-insulating floor covering material according to the present invention.

FIG. 2 is a sectional view of a floor subjected to a test of an example.

FIG. 3 is a cross-sectional view of a floor subjected to a test of Comparative Example 1.

FIG. 4 is a cross-sectional view of a floor subjected to a test of Comparative Example 2.

[Explanation of symbols]

 A 5.5mm thick plywood B Mixture layer C High density soft sheet D Soundproof floor base material according to the present invention E 12mm thick plywood F Rubber mat G Flooring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04F 15/18 E04F 15/02 E04F 15/04

Claims (1)

(57) [Claims] 1. A floor base material to be attached and constructed on a wooden floor set of a wooden house, comprising a flat base material such as plywood, a mixture layer of foam synthetic resin particles and an inorganic binder, and a high-density soft sheet in order. Soundproof floor base material that is integrated with an adhesive.