JPH0618973Y2 - Soundproof floor base material - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a soundproof floor base material used to eliminate impact noise from concrete slabs such as condominiums and hospitals.

<Conventional Technology> Conventionally, a floor construction method in which glass wool is laid on a slab and plywood or a floor finishing material is laminated on the upper surface thereof is used as a floor slab for concrete slabs in middle- and high-rise houses such as condominiums and hospitals.

This floor construction method reduces the propagation of the impact force to the concrete slab by alleviating the impact force received by the floor finishing material and the like by the elasticity of the glass wool.

<Problems to be solved by the invention> However, when it is necessary to completely block the floor impact sound on the upper and lower floors such as in an apartment or a hospital, the above floor structure is not sufficient. Therefore, it is possible to increase the thickness of glass wool or to increase the density to absorb the vibration force from floor impact, but increasing the thickness of glass wool increases the amount of deformation and the floor base material itself becomes thicker. Therefore, if the glass wool is densified, the vibration damping time of the floor finishing material will be long and the propagation sound will remain for a long time.

There is also a problem that the soundproofing performance of the floor base material itself is deteriorated due to the migration of water from the slab or the leakage of water from the floor into the glass wool, and in some cases, the glass wool peels off.

<Means for Solving the Problems> The present invention has been devised to solve the above-mentioned problems, and an inorganic binder and expanded synthetic resin particles are provided on the back surface side of a wood-based plate-like substrate through a waterproof layer. This problem is solved by mixing an inorganic mixed layer consisting of and a high density glass wool layer whose entire surface is covered with a shrink film.

<Example> The soundproof floor base material of the present invention will be described in detail below with reference to the drawings.

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

This sound-insulating floor base material comprises a wood-based plate-shaped substrate 1, an inorganic mixed layer 2 composed of an inorganic binder and expanded synthetic resin particles and a high-density glass wool layer 3 laminated on the lower surface thereof.

As the wood-based plate-shaped substrate 1, fiberboard, particle board, wood wool board, etc. are used in addition to plywood. As the inorganic binder in the inorganic mixed layer 2, a hydraulic binder such as Portland cement or gypsum, and a foamed synthetic resin particle made of a foam such as styrene, urea, phenol, urethane, vinyl chloride, polyethylene, etc. Is kneaded.

As the foamed synthetic resin particles, those having a particle size of about 0.2 to 10 mm are used, and if the foaming ratio is high and it is a closed cell, it is effective in absorbing the floor impact sound. A waterproof layer 21 is formed between the wood-based plate-shaped substrate 1 and the inorganic mixed layer 2. As the waterproof layer 21, an acrylic resin, which is usually known as a waterproof material,
Various synthetic resin emulsions such as vinyl acetate are used,
Since these substances also have an effect as an adhesive, the relatively weak brittle inorganic mixed layer 2 has a large bending strength due to the waterproof layer 21 interposed between the inorganic layer 2 and the wooden board substrate 1. It is in a state of being compositely complemented by the wooden board 1 having elasticity.

On the lower surface side of the inorganic mixed layer 2, a high density glass wool layer 3 whose entire surface is covered with a shrink film 31 is formed. The high density glass wool layer 3 used in the present invention has an areal density of 90.
Glass wool of about 100 kg / m ³ is suitable, and a vinyl chloride-based or polyolefin-based shrinkable film having a thickness of about 0.04 mm is used as the shrinkable film 31 covering the glass wool. At the time of adhering the inorganic mixed layer 2 and the high density glass wool layer 3, a commonly used one such as a modified vinyl emulsion adhesive is used.

Next, a method of constructing the soundproof floor base material having the above configuration on the concrete slab will be described.

FIG. 2 is a schematic cross-sectional view of a floor structure using the soundproof floor base material according to the present invention.

First, a soundproof floor base material is laid on the concrete slab 4. In this case, the high-density glass wool layer 3 is laid in a state of being arranged on the surface of the concrete slab 4, and a wooden floorboard 5 such as a composite flooring is laid on the upper surface of the wooden board-shaped substrate 1. As a soundproof floor base material, a base material 1 made of plywood having a thickness of 5 mm was combined with an inorganic mixed layer 2 having a thickness of 13 mm to make a total thickness of 18 mm, and then a thickness of 40 mm (area density 96 kg / m ³ By combining the high density glass wool layer 3), the surface density becomes approximately 24 to 25 kg / m ² , and the vibration force from the wooden floor board 5 due to impact is absorbed and attenuated by the inorganic mixed layer 2 and the high density glass wool layer 3. Thus, the vibration of the wooden floorboard 4 is suppressed.

As a result, the impact sound transmitted to the concrete slab 4 can be significantly reduced.

FIG. 3 shows the relationship between the floor impact sound (dB) generated by the tapping machine and the octave band center frequency (HZ) in the floor structure.

Also from this figure, it is clear that the shock absorbing performance is excellent.

In the above configuration, the case where each of the wood-based plate-shaped substrate and the inorganic mixed layer is a single layer has been described, but two layers of the wood-based plate-shaped substrate 1 and the inorganic mixed layer 2 are used as shown in FIG. Alternatively, the inorganic mixed layers 2 and 2 may be combined face-to-face to form a composite, and the high-density glass wool layer 3 may be combined with the wood-based plate-shaped substrate 1 on the lower surface.

In this case, the two inorganic mixed layers 2 and 2 are adhered to each other to form a so-called sandwich panel, which exhibits an extremely excellent shock noise cushioning performance as described above.

<Effects of the Invention> The soundproof floor base material according to the present invention improves the surface density of the entire floor base material by adopting a structure in which an inorganic mixed layer, a wood-based plate-like substrate and a high-density glass wool layer are combined. It is possible to reduce the propagation of impact force to the concrete slab at the time of floor impact, and to receive partial deformation due to local load from the surface in the entire composite layer consisting of the inorganic mixed layer and the wooden board substrate, resulting in high density. It is also possible to prevent deformation of the glass wool layer.

In addition, the floor base material itself consists of a wooden plate-like base material, an inorganic mixed layer mixed with synthetic resin particles, and a high-density glass wool layer, so sawing is easy, and nailing and fastening with adhesive are also possible. Therefore, the workability in floor construction can be greatly improved. Furthermore, since the high-density glass wool layer is entirely covered with a shrink film, the sound absorption performance of the floor base material itself is reduced due to the migration of water into the glass wool, and the high-density glass wool layer peels from the slab surface. Since there is no such problem and there is no tingling sensation peculiar to glass wool, handling at the time of construction is extremely easy.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a soundproof flooring base material according to the present invention, FIG. 2 is a schematic sectional view showing a floor construction using the soundproofing floor base material according to the present invention, and FIG. FIG. 4 is a graph showing shock noise cushioning performance when using such a soundproof floor base material, and FIG. 4 is a schematic cross-sectional view showing another embodiment of the soundproof floor base material according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Wooden board | substrate, 21 ... Waterproof layer, 2 ... Inorganic mixed layer, 3 ... High density glass wool layer, 31 ... Shrink film, 4 ... Concrete slab, 5 ... Wood floorboard.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-194360 (JP, A) Actually opened 63-19639 (JP, U) Actually opened 59-185197 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A composite of an inorganic mixed layer composed of an inorganic binder and expanded synthetic resin particles and a high-density glass wool layer whose entire surface is covered with a shrink film on the back side of a wood-based plate-like substrate through a waterproof layer. Soundproof floor base material.