JPH11241490A - Soundproof floor material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make compatible both soundproof property and a walking feeling by laminating a plurality of material layers containing a cushioning material, mixing the material with a number of fine pieces of foaming resin whose density is different, and constituting compressed and solidified ribbon dead foam. SOLUTION: A floor material 1 is constituted of three layers of a decorative material 2, a base material 3 and a cushioning material 4 in order from a surface layer side. The base material 3 is constituted of relatively rigid material, attenuation of sound is promoted on the reverse, and a plurality of grooves 5 for heightening soundproof property are formed at a regular interval. The cushioning material 4 is constituted of ribbon dead foam 6, a number of fine pieces 6a comprising a high density continuous bubble type foaming resin are mixed with a number of fine pieces 6b comprising the high density bubble type foaming resin, and the resin compressed and solidified by a binder is used. Thereby the density of the cushioning material is not uniform, and energy of sound transmitted the cushioning material through the decorative material and the base material is remarkably attenuated by density change at the time of passing the buffer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof flooring material in which a plurality of material layers including a cushioning material for obtaining soundproof performance are laminated.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show two examples of this type of conventional soundproof flooring. Soundproof floor material 51 shown in FIG.
Is composed of a decorative material 52, a base material 53, and a cushioning material 54 in order from the surface layer side. As the decorative material 52, a decorative veneer is mainly used. The base material 53 is made of a relatively high rigidity material such as plywood or MDF, and has a plurality of grooves 55 formed on the back surface thereof. The cushioning material 54 is made of a foamed resin such as foamed polyurethane, a non-woven fabric, SBR, N
It is composed of a homogeneous sheet material made of BR or natural rubber. According to this configuration, the rigidity of the soundproof flooring material 51 is ensured by the base material 53, and the soundproofing and cushioning properties are obtained by the cushioning material 54. The sound-insulating floor member 61 of FIG. 6 is different from the sound-insulating floor member 51 of FIG.
By forming the unevenness 62 on the front and back surfaces, the soundproof performance is enhanced.

[0003]

However, in each of the two sound-insulating floor members 51 and 61 described above, the cushioning member 54 is made of a homogeneous material. For example, in the case of a highly foamed foam resin, the cushioning material 54 becomes too soft, resulting in a fluffy walking sensation and a large sinking amount during walking.
The drawback is that some people experience symptoms similar to seasickness. Conversely, if the cushioning material 54 is made of a low-foaming foam resin in order to improve the walking feeling, sufficient soundproofing performance cannot be obtained.

The present invention has been made in order to solve such a problem, and provides a soundproof flooring material which can achieve both a sufficient soundproofing performance and a good walking feeling with a relatively simple structure. It is intended to be.

[0005]

In order to achieve this object, the present invention provides a soundproof flooring material formed by laminating a plurality of material layers including a cushioning material in front and back directions, wherein the cushioning material is: Mix many strips of foamed resin with different densities,
It is characterized by being composed of a compressed and solidified ribbon dead foam.

In this soundproof flooring material, a large number of small pieces of low-density foamed resin and small pieces of high-density foamed resin are mixed in the cushioning material, and the density of the cushioning material becomes non-uniform. Sound energy transmitted to the cushioning material through the material and the base material is greatly attenuated by a change in density when passing through the cushioning material.
Therefore, a sufficient soundproofing effect can be obtained. In addition, since the low-density and high-density foamed resins are mixed, the density of the cushioning material as a whole, and hence the hardness thereof, become their average value, so that a good walking feeling that is not too soft can be obtained.

A ribbon dead foam obtained by mixing and compressing and solidifying pieces of foamed resin having different densities as described above is produced, for example, by reclaiming foamed polyurethane scraps, and is produced more than ordinary foamed polyurethane. Since it is commercially available at a low price, the use of such a commercially available product can reduce the material cost of the cushioning material and, consequently, the manufacturing cost of the acoustic flooring material. Alternatively, the desired soundproofing performance and walking sensation may be obtained by specially setting the type and density of the foamed resin, the number of stages thereof, the mixing ratio, and the like, and producing a ribbon dead foam.

[0008] In order to achieve the above object, the present invention is a soundproof flooring material formed by laminating a plurality of material layers including a cushioning material in a front-to-back direction, wherein the cushioning material comprises a large number of foamed resins. And a plurality of small pieces of another material having a different density from the foamed resin.

In this soundproof floor material, the density of the cushioning material becomes non-uniform due to the large number of small pieces of the foamed resin and the large number of small pieces of another material having a different density from the foamed resin. Similarly to the material, the sound energy transmitted to the cushioning material is greatly attenuated by the change in density when passing through the cushioning material, so that a sufficient soundproofing effect can be obtained.

In this case, it is preferable that the other material has a higher hardness than the foamed resin.

With this configuration, the lack of hardness of the foamed resin can be compensated for by the hardness of another material, and a good walking feeling that is not too soft can be reliably obtained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a sound-insulating floor material to which the present invention is applied (hereinafter simply referred to as “floor material”). As shown in the figure, this flooring 1 is composed of a total of three layers of a decorative material 2, a base material 3, and a cushioning material 4 in order from the surface layer side.

As the decorative material 2, a decorative veneer such as oak or hippopotamus is mainly used. The base material 3 is made of a material having relatively high rigidity such as plywood or MDF, and a plurality of grooves 5 for promoting sound attenuation and improving soundproof performance are provided on the back surface thereof.
They are formed at equal intervals. Note that these grooves 5 can be omitted.

The cushioning member 4 is constituted by a so-called ribbon dead form 6. This ribbon dead form 6
Is composed of a number of small pieces 6a (hereinafter referred to as "low-density pieces") made of a low-density open-cell foamed resin (for example, polyurethane foam) and a plurality of pieces made of a high-density open-cell foamed resin (for example, polyurethane foam). Small pieces 6b (hereinafter "high density pieces")
) And compressed and solidified with a binder.

In the flooring material 1 having the above-described structure, a large number of low-density pieces 6a and high-density pieces 6b made of foamed polyurethane are mixed in the cushioning material 4, and the density of the cushioning material 4 becomes non-uniform. The energy of the sound transmitted to the cushioning material 4 via the material 2 and the base material 3 can be largely attenuated by the change in density when passing through the cushioning material 4, and therefore a sufficient soundproofing effect can be obtained. In addition, the low density piece 6a and the high density piece 6b
, The density of the cushioning material 4 as a whole, and hence the hardness thereof, becomes their average value, so that a good walking feeling that is not too soft can be obtained. In addition, the flooring 1 can achieve the above-described effects with a relatively simple configuration having a three-layer structure.

In this case, the low density piece 6a and the high density piece 6
The density and the mixing ratio of b are preferably in the ranges shown in Table 1 below. In the ranges shown in Table 2, it has been confirmed that particularly good soundproofing performance and walking feeling can be achieved.

[0017]

[Table 1]

[0018]

[Table 2]

As the cushioning material 4, a commercially available ribbon dead foam can be used. Generally, commercially available ribbon dead foam is regenerated using scrap materials such as various kinds of foamed polyurethane, and strips of foamed polyurethane having various densities are mixed. By using it, good soundproof performance and walking feeling can be obtained. Also, since commercially available ribbon dead foam is less expensive than ordinary foamed polyurethane, there is an advantage that the material cost of the cushioning material 4 and the production cost of the floor material 1 can be reduced.

FIG. 2 shows a modification of the flooring 1 of the first embodiment. The flooring 1 is formed by embossing the front and back surfaces of a ribbon dead foam 6 which is a cushioning material 4 by thermal compression or the like, thereby forming irregularities 7 in advance. According to the flooring 1, the attenuation of the sound is promoted by the air layer 8 constituted by the unevenness 7, so that better soundproofing performance can be obtained. The irregularities 7
May be formed on only one of the front and back surfaces of the ribbon dead form 6.

FIG. 3 shows another modification of the flooring 1 of the first embodiment. The floor material 1 is obtained by attaching a nonwoven fabric 9 to the back surface of a cushioning material 4. According to the floor material 1, since the nonwoven fabric 9 improves the slippage, the workability when laying the floor material 1 is improved, and the penetration of the adhesive into the cushioning material 4 is prevented by the nonwoven fabric 9. As a result, adverse effects such as a reduction in soundproofing performance can be prevented.

FIG. 4 shows a flooring according to a second embodiment of the present invention. This floor material 11 is the floor material 1 of the first embodiment.
The structure of the cushioning material is different from that of FIG. That is, the cushioning material 4 of the flooring 1 is a ribbon dead foam 6 in which high-density and low-density foamed resin strips 6a and 6b are mixed.
, The cushioning material 12 of the present embodiment
Is composed of a number of strips 12a (hereinafter referred to as “resin pieces”) made of an open-cell foamed resin (eg, polyurethane foam);
It is formed by mixing a large number of small pieces 12b (hereinafter referred to as "material pieces") made of another kind of material and compressing and solidifying the mixture with a binder.

The material piece 12b is made of a material having a higher density and hardness than the resin piece 12a, for example, natural rubber, NBR
It is made of rubbers such as wood and SBR, woods such as natural wood and artificial boards, fibers such as felt and cloth, and recycled resin.

According to this flooring 11, a large number of resin pieces 12
a and the material piece 12b are mixed, so that the cushioning material 12
Of the sound transmitted to the cushioning material 12 like the flooring material 1 of the first embodiment.
2 can be largely attenuated by a change in density when passing through, and therefore a sufficient soundproofing effect can be obtained. Further, the insufficient hardness of the resin piece 12a can be compensated for by the hardness of the material piece 12b, and a good walking feeling that is not too soft can be reliably obtained.

As described above, the material piece 12b is
Any material having a higher density and hardness than the resin piece 12a can be used, so that it is possible to use waste materials and offcuts of the above-mentioned materials. Costs can be reduced.

The present invention is not limited to the embodiments described above, but can be implemented in various modes.
For example, in the first embodiment, the strip of the ribbon dead foam 6 is composed of two types of low-density and high-density foamed polyurethane, but the type of foamed resin is changed to another appropriate one, or the density is reduced. It is possible to increase the number of stages. Further, other materials can be appropriately added to the configuration exemplified in the embodiment. In addition, the material and the detailed configuration can be appropriately changed without departing from the spirit of the present invention.

[0027]

As described above in detail, the sound-insulating flooring material of the present invention has a relatively simple structure, and has an effect such that sufficient soundproofing performance and good walking feeling can be achieved at the same time. I have.

[Brief description of the drawings]

FIG. 1 is a sectional view of a soundproof flooring according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a modified example of the soundproof floor material of FIG.

FIG. 3 is a sectional view showing another modified example of the soundproof flooring material of FIG. 1;

FIG. 4 is a sectional view of a soundproof flooring according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional soundproof flooring material.

FIG. 6 is a cross-sectional view of another conventional soundproof flooring material different from FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Soundproof floor material 2 Decorative material 3 Base material 4 Buffer material 6 Ribbon dead form 6a Low density piece 6b High density piece 11 Soundproof floor material 12 Buffer material 12a Resin piece 12b Material piece

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigetaka Isoyama 3-1-1, Nihonbashi Muromachi, Chuo-ku, Tokyo Inside Toyo Quality One Co., Ltd. (72) Inventor Hirokazu Wakabayashi 3-1-1, Nihonbashi Muromachi, Chuo-ku, Tokyo No. 20 Toyo Quality One Co., Ltd.

Claims (3)

[Claims] 1. A soundproof flooring material formed by laminating a plurality of material layers including a cushioning material in a front-to-back direction, wherein the cushioning material mixes a number of small pieces of foamed resin having different densities, A sound-insulating flooring characterized by being composed of a compressed ribbon-dead foam. 2. A soundproof flooring material formed by laminating a plurality of material layers including a cushioning material in a front-to-back direction, wherein the cushioning material comprises a number of small pieces of a foamed resin, a density of the foamed resin, A sound-insulating flooring characterized by being made of a material obtained by compressing and solidifying a mixture of a large number of strips of other materials different from each other. 3. The sound-insulating flooring according to claim 2, wherein the other material has a higher density than the foamed resin.