JPH03247858A - Soundproof floor - Google Patents

Abstract

PURPOSE:To increase a plane-tensile strength, by closely laminating a vibration proof sheet, in which a foamed substance like synthetic resin or rubber is soaked, in a fiber sheet made of synthetic fiber or inorganic fiber, etc., in the substrate of the surface layer. CONSTITUTION:A surface layer 1 is made of a 2.5mm thick plywood and a vibration proof sheet 2 soaked with foamed polyurethane having the foaming magnitude of 12 times is closely laminated in a 3mm thick fiber sheet made of polyethylene-phthalate fiber with about 5mum fiber dia. at the substrate. And further, under the substrate thereof, an about 7mm thick plywood intermediate layer 3 is closely bonded, having about 2mm wide, about 6mm deep, about 60mm pitch grooves at the backface thereof. And further, under the substrate thereof, an about 5mm thick natural rubber having the foaming magnitude of 3 times is laminated as an elastic layer 4. In this way, a soundproof property and a walking feeling can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a soundproof floor that reduces floor impact noise and ensures strength as a floor and a suitable walking feel.

[Conventional technology] Conventionally, soundproof floors have been made by installing sheets made of synthetic resin, rubber, or foams of these materials below the surface layer to reduce the impact force applied to the floor surface and improve soundproofing performance. Ta. However, in order to obtain high soundproofing performance, a sheet with a low elastic modulus is used, so the warping of the surface layer is prevented.
In addition, when handling the flooring material, there is a drawback that the required planar tensile strength is weak.

[Problem to be solved by the invention]

The present invention was made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a soundproof floor with improved planar tensile strength while maintaining high soundproofing performance.

[Means for Solving the Problems] The soundproof floor of the present invention has a control material obtained by impregnating a fiber sheet made of synthetic fibers, inorganic fibers, etc. with synthetic resin, rubber, etc. or foams thereof in the lower part of the surface layer. It is a soundproof floor made by tightly laminating vibrating sheets, and in order to further enhance the effect, flake-like powder is mixed into the impregnated synthetic resin, rubber, etc., or foamed material thereof.

Examples of flaky powder include mica vermiculite and glass flakes. As a synthetic fiber,
Synthetic resin fibers are generally used, and inorganic fibers include:
Asbestos fibers and glass fibers are used.

[For production]

The soundproof floor of the present invention has a vibration damping sheet obtained by impregnating a fiber sheet made of synthetic fibers, inorganic fibers, etc. with synthetic resin, rubber, etc. or foams thereof under the surface layer. For plane tensile strength, the strength of the fiber sheet is utilized and the synthetic resin, rubber, etc. or foamed materials thereof are reinforced, and the plane tensile strength is improved. On the other hand, since it is a fiber sheet, a low elastic modulus in the compression direction is maintained, so that the same effect of reducing impact force as in the past can be obtained and the soundproofing performance is maintained.

Furthermore, in the case of synthetic resins, rubbers, etc. or their foams mixed with flake-like powder, the strength is further improved due to the reinforcing effect as a filler, and the strength is further improved compared to the flake-like powder. Since the loss coefficient of the vibration damping sheet increases due to energy loss at the interface with synthetic resin, rubber, etc. or foam thereof, a soundproof floor with equivalent soundproofing performance and improved walking feel can be obtained.

〔Example〕

Example 1 will be explained based on FIG. 1.

At the bottom of the surface layer 1, which is several millimeters thick and made of wood, polymeric material, etc., is a several-layer layer made of synthetic fibers or inorganic fibers with fiber diameters of several μm to several hundred μm, and has an areal density of several tens to 300 g/rII. A vibration damping sheet 2 obtained by impregnating a synthetic resin, rubber, etc. or a foam of these is laminated closely on a fiber sheet, and an intermediate layer 3 of several thicknesses thick made of wood, polymeric material, etc. is further layered below it. They were laminated closely together, and an elastic layer 4 made of synthetic resin, rubber, etc. was further laminated underneath. This elastic layer 4 is closely laminated on a frame 5 such as a concrete slab.

In this example, the surface layer 1 is made of plywood with a thickness of 2.5 ttrm, and the damping sheet 2 is made of polyethylene terephthalate fibers with a fiber diameter of 5 μm, an areal density of 85 g/bo, and a thickness of 3.
The intermediate layer 3 is formed by impregnating a fiber sheet of InI11 with foamed polyurethane with a foaming ratio of 12 times at a rate of 240 g/nf.
, grooves are provided vertically and horizontally with a groove depth of 6 mm and a groove pitch of 60 mm, and the elastic layer 4 is made of triple-foamed natural rubber with a thickness of 5. teeth,
It was 0.7 kg g/cffl.

Furthermore, when this soundproof floor was installed on the frame 5 made of a concrete slab with a thickness of 150 mm, the floor impact sound level according to the JIS standard was L-46 as shown in FIG. 2a.

On the other hand, for comparison, the planar tensile strength is 0 when the structure of other parts is the same as this example and foamed polyurethane is installed as a sheet without using a fiber sheet as a vibration damping sheet.
．． 15 kg/c+11, and the floor impact sound level according to the JIS standard was L-45 as shown in Figure 2.

The Young's modulus of the damping sheet used in this example and the comparative soundproofing floor is 3xlO'N/rrr and 2XIO3, respectively.
N/TT? Since the damping sheet of this example also maintains a low elastic modulus, the plane tensile strength is significantly improved, although the soundproofing performance remains almost the same.

Note that the close lamination of the surface layer 1 and the damping sheet 2 may be performed at the construction site, or may be performed in advance and commercialized. Further, the surface layer 1 and the vibration damping sheet 2 may be laminated in close contact with each other, and then the intermediate layer 3 and the elastic layer 4 may be laminated in advance to commercialize the product.

[Example 2] The soundproof floor of Example 2 has basically the same structure as the soundproof floor of Example 1, and the fiber sheet is impregnated with gold mica having an average flake diameter of 280 μm, and 100% polyurethane by weight is added to the polyurethane foam impregnated into the fiber sheet. However, the same soundproofing performance and plane tensile strength as in Example 1 were obtained, and the walking feeling was also improved.

〔Effect of the invention〕

The soundproof floor of the present invention is a soundproof floor in which a vibration damping sheet obtained by impregnating a fiber sheet made of synthetic fibers, inorganic fibers, etc. with synthetic resin, rubber, etc. or foams thereof is laminated in close contact with the lower part of the surface layer. Therefore, it has high soundproofing performance and excellent planar tensile strength.

Furthermore, in the case of synthetic resins, rubbers, etc. or their foams mixed with flake-like powder, the strength is further improved due to the reinforcing effect as a filler, and the strength is further improved compared to the flake-like powder. Since the loss coefficient of the damping sheet increases due to energy loss at the interface with synthetic resin, rubber, etc. or foam thereof, a soundproof floor with equivalent soundproofing performance but improved walking feel can be obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the present invention, and FIG. 2 is a graph showing the floor impact sound level of the same. 1 is a surface layer, 2 is a damping sheet, 3 is an intermediate layer 4 is an elastic layer,
5 is the main body. 1st agony 2nd picture - Fuba dying IL1! l Kiyoshi* (, l4z) 1990
May 31st

Claims (2)

[Claims] (1) A vibration damping sheet obtained by impregnating a fiber sheet made of synthetic fibers, inorganic fibers, etc. with synthetic resin, comb, etc., or foams thereof, is laminated in close contact with the lower part of the surface layer. Soundproof floor. (2) A soundproof floor according to claim 1, characterized in that a synthetic resin, rubber, etc., or a foam thereof, which is impregnated into a fiber sheet, is mixed with flaky powder.