JPH0533469A - Damper member for sound insulating member and direct application type sound insulating member using same - Google Patents

Abstract

PURPOSE:To provide a floor member excellent in workability and sound insulation by covering an intermediate layer made of a fiber material, at its upper and lower surfaces, with high and low foamed plastic materials, respectively, and by directly applying a floor member made of a predetermined material and having a shape, to the buffer. CONSTITUTION:An acoustic insulating buffer 1 is composed of an upper layer 2 made of a foamed plastic material having a high foamed rate, an intermediate layer 3 made of a fiber material and a lower layer 4 made of a plastic material having a low foaming rate. The upper and intermediate layers 2, 3 have natural frequencies of less than 500/2<1/2>Hz and 200/2<1/2>Hz, respectively, and accordingly, the buffer 1 has a natural frequency of less than 125/2<1/2>. The floor member 5 is composed of a first layer 6 made of an oak veneer having a thickness of about 0.3mm, a second layer 7 made of a plywood material having about a 2.5mm, a vibration damper sheet 8 having a thickness of about 1.0mm and a fourth layer 9 made of a plywood material having about a thickness of 9mm formed therein with a cut groove 10. Next, the buffer 1 is adhered to the rear surface of the floor plate 5. With this arrangement, it is possible to provide a sound insulating floor member excellent in sound insulation and workability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning material to be attached to the back surface of a floor material and a soundproof floor material for direct tensioning using the same, and more specifically to not only lightweight floor impact sound but also heavy floor impact sound. The present invention relates to a cushioning material for a soundproofing floor material having excellent sound insulation performance and a soundproofing floor material for direct tensioning using the same.

[0002]

2. Description of the Related Art In recent years, it has become more and more common to use a wooden soundproof floor material that is upholstered in a direct contact with a cushioning material for sound insulation attached to the back surface of the wooden floor material in middle and high-rise houses. As the cushioning material used in this case, conventionally, a fiber material such as a non-woven fabric or a foamed plastic material such as a foamed sheet has been used.

However, among the conventional wood soundproof flooring materials for direct upholstery, in order to obtain a high-performance flooring material by using the above-mentioned fiber-based or foamed plastic-based material alone as a cushioning material, the natural frequency of the material is lowered. However, in the case of making it do, the sound insulation performance near 500 Hz corresponding to the heavy floor impact sound is inferior.

Further, in the case of the conventional cushioning material as described above, since the adhesive used when laying the floor material on the concrete slab penetrates into the cushioning material, the sound insulation performance is significantly deteriorated. However, it has a drawback that the friction resistance with the concrete slab becomes too large and the workability deteriorates.

Further, in order to improve the sound insulation performance against a light weight floor impact sound, when a buffer material having a small dynamic spring constant or a static spring constant is used, the buffer material becomes sparse and the cushioning material is sparse during construction. There was a problem that the cutting property with a saw was lowered.

[0006]

DISCLOSURE OF THE INVENTION The inventors of the present invention have conducted extensive studies to solve the above-mentioned drawbacks, and as a result, by stacking buffer materials having different natural frequencies, the adhesive applied to a concrete slab In addition to reducing the penetration into the cushioning material to reduce the frictional resistance with the concrete slab surface during construction, it is possible to use not only a lightweight floor impact sound but also a heavy floor impact sound. Heading, arrived at the present invention.

Therefore, an object of the present invention is to provide a cushioning material for a soundproof floor material which is excellent in sound insulation performance against a light weight floor impact sound and a heavy floor impact sound, and a soundproof floor material for direct tensioning using the same which is excellent in workability. To provide.

[0008]

The above objects of the present invention are as follows.
A cushioning material to be attached to the back surface of the flooring material, in which an upper layer made of a foamed plastic material with a high expansion ratio, a middle layer made of a fiber material, and a lower layer made of a foamed plastic material having a low expansion ratio are sequentially laminated. This is achieved by a cushioning material for soundproof flooring, which is characterized by the above, and a soundproofing floor material for direct tensioning using the same.

The foamed plastic material for the upper and lower layers used in the present invention can be appropriately selected and used from materials such as polyethylene, polypropylene, polyvinyl chloride and polystyrene.

The upper cushioning material has a dynamic spring constant of 15 × so that the natural frequency of the cushioning material is 500 / √2 Hz or less from the viewpoint of improving the sound insulation performance in the vicinity of 500 Hz corresponding to the heavy floor impact sound. 10 ⁶ to 50 × 10 ⁶ N / m
³ , the thickness is 1 to 3 mm and the expansion ratio is 20 to
It is preferably 40 times.

On the other hand, the cushioning material in the lower layer reduces the penetration of the adhesive used during construction to maintain the sound insulation performance of the cushioning material and also reduces the frictional resistance between the cushioning material and the concrete slab surface during construction. Therefore, the expansion ratio is 5
It is preferable to use one having a thickness of 10 times and a thickness of 1 to 3 mm.

The middle layer fibrous material used in the present invention is a material produced by appropriately blending synthetic fibers such as polyester, polypropylene and polyolefin and using heat-sealing fibers or by needle punching method. Can be appropriately selected and used. Further, from the viewpoint of improving the sound insulation performance around 250 Hz corresponding to the lightweight floor impact sound, the dynamic spring constant is set to 5 × 10 ⁶ to 15 × 10 ⁶ N / so that the natural frequency is 250 / √2 Hz or less. m
It is preferable that the thickness is ³ and the thickness is 2 to 5 mm.

In particular, in the present invention, the respective layers can be combined so that the natural frequency of the entire cushioning material is 125 / √2 Hz or less, whereby the sound insulation performance can be further improved.

The sound-proof flooring material for direct upholstery of the present invention can be manufactured by applying the cushioning material having the above-mentioned structure to the back surface of the flooring material by a known method. As the flooring material, it is possible to appropriately select and use from among known materials such as plywood having a decorative material attached to the surface thereof.

[0015]

[Operation] The vibration of the floor impact sound generated on the floor surface is transmitted to the concrete slab through the cushioning material of the present invention attached to the back surface of the floor material, and then to the downstairs.

In this case, the natural frequency of the middle layer nonwoven fabric is 2
Since it is set to 50 / √2Hz or less, the vibration transmissibility of the sound of 250Hz or less during the vibration generated by the light weight impact or the heavy impact is reduced, and the generation of the floor impact sound of 250Hz or less is suppressed. You can Moreover, at the same time, the natural frequency of the upper foam plastic material is set to 5
Since it is set to be 00 / √2 Hz or less, it is possible to suppress the vibration transmission of the sound near 500 Hz which is likely to occur as a peak at the time of weight impact.

Furthermore, the natural frequency of the entire cushioning material is 125 /
Since it is set to √2 Hz or less, the vibration transmissibility of the sound of 125 Hz or less during the vibration generated by the impact is also reduced, and the generation of the floor impact sound of 125 Hz or less can be suppressed.

Further, when the sound-proof flooring material for direct upholstery of the present invention is laid on a concrete slab, the low expansion ratio plastic material of the lower layer hardly penetrates the adhesive applied to the concrete slab surface into the cushioning material. The sound insulation performance of the cushioning material is not deteriorated, and the friction resistance between the concrete slab surface and the back surface of the floor material is small, so that the construction is easy.

Further, since the flooring material of the present invention uses a material having a small static spring constant or a small dynamic spring constant between the plastic materials having a large foaming constant and a low expansion ratio, the cutting property with a saw is good. Is.

[0020]

Embodiments of the cushioning material for a soundproof flooring material and the soundproofing floor material for direct tensioning using the same according to the present invention will be described in detail below with reference to the drawings, but the present invention is not limited thereto. .

Example 1. As a cushioning material for soundproof floor materials, Fig. 1
What was represented by the cross-sectional block diagram of was used. In the figure, reference numeral (1) indicates the entire cushioning material, and reference numeral (2) indicates the cushioning material (1).
Is an upper layer, (3) is an intermediate layer, and (4) is a lower layer.

The cushioning material (1) in the present embodiment is an upper layer (2) made of a foamed polyethylene sheet having a dynamic spring constant of 50 × 10 ⁶ N / m ³ , a thickness of 2 mm and a foaming ratio of 30 times. Middle layer (3) made of needle staple type non-woven fabric made of polyester staple with spring constant of 12 × 10 ⁶ N / m ³ and thickness of 3.25 mm, dynamic spring constant of 120 × 10 ⁶ N / m ³ , thickness of 1 mm And a lower layer (4) made of a foamed polyethylene sheet having a foaming ratio of 10 times, which are sequentially laminated using a vinyl resin adhesive.

FIG. 2 shows a soundproof floor material for direct tensioning of the present invention in which the above-mentioned cushioning material is attached to the back surface of the floor material. In the figure, reference numeral (5) indicates the entire floor material excluding the cushioning material (1), reference numeral (6) indicates the first layer constituting the floor material (5), and (7) indicates the second layer.
Layer, (8) is third layer, (9) is fourth layer, (10) is fourth layer
The groove provided in the layer is shown. Other reference numerals have the same meaning as in FIG.

The first constituting the floor material (5) in this embodiment
The layer (6) is a oak veneer having a thickness of 0.3 mm, the second layer (7) is a plywood having a thickness of 2.5 mm, and the third layer (8) is an acrylic rubber vibration damping sheet having a thickness of 1.0 mm. , And the fourth layer (9) are plywood having a thickness of 9 mm.

The groove (10) provided in the fourth layer (9) is for improving the followability of the floor material to the concrete slab and for further improving the sound insulation performance. In the case of the example, the width is 2.4 mm and the depth is 9 m
m, and the groove interval is 66.6 mm.

The floor impact sound level of the soundproof floor material for direct tensioning of the present invention produced as described above was measured by the measuring method of JIS A1418.
(See FIG. 3), the heavy floor impact sound insulation performance was L55 (see FIG. 4).

The slip resistance between the sound-proof flooring material for direct upholstery of the present invention and the concrete slab surface coated with the epoxy adhesive for flooring was 75 kg / m ² when measured with a spring, and the adhesive was applied. When laid on the concrete slab surface, 3.1 m ² can be installed per hour,
The workability was excellent.

Comparative Example 1. Instead of the cushioning material used in Example 1, a non-woven fabric (3.5 mm
Thickness was applied, and the floor impact sound insulation level was measured in the same manner as in Example 1. As a result, the insulation performance against light floor impact sound was L48 (see FIG. 3) and the insulation performance against heavy floor impact sound was L59. (See FIG. 4). Also, the sliding resistance against the concrete slab surface coated with adhesive is 244 kg.
/ M ² , and the laying speed was 2.3 m ² / hour.

Comparative Example 2. Dynamic spring constant is 75 × 10 ⁶ N
/ M ^2, middle and dynamic spring constant layer thickness is at 2mm foamed polyethylene sheet, the dynamic spring constant is 20 × 10 ⁶ N / m ² and thickness made of a needle punch type a polyester staple 3.25mm Is 200 × 10
^A soundproof flooring material for direct upholstery was obtained in exactly the same manner as in Example 1 except that the lower layer made of a foamed polyethylene sheet having a thickness of ⁶ N / m ² and a thickness of 1 mm was used. The obtained soundproof floor material for direct tension,
When evaluated in the same manner as in Example 1, the lightweight floor impact sound insulation performance was L47 and the heavy floor impact sound insulation performance was L58.

From the above measurement results of Example 1 and Comparative Examples 1 and 2, the sound-proof floor material for direct tension of the present invention is superior to the conventional sound-proof floor material for direct tension in both light weight and heavy floor impact sound insulation performance. It was also confirmed that the workability was improved.

[0031]

As described above in detail, since the cushioning material for soundproof flooring material of the present invention is a laminate of foamed plastic material and fiber material, not only the sound insulation effect against light weight floor impact sound but also the weight is reduced. In addition to having a sound insulation effect against floor impact sound, since a foamed plastic material with a low expansion ratio is used on the back surface of the cushioning material, there is almost no friction resistance with the concrete slab surface coated with an adhesive and it is easy to work Are better.

The cushioning material for soundproof flooring of the present invention is a static
Since the material having a small dynamic spring constant is used between the plastic materials having a large expansion coefficient and a low expansion ratio, the cutting property with a saw is good.

[Brief description of drawings]

FIG. 1 shows a cross-sectional configuration diagram of a cushioning material for a soundproof flooring material of the present invention.

FIG. 2 shows a wood soundproof flooring material for direct tensioning of the present invention in which the cushioning material of FIG. 1 is attached to the back surface.

FIG. 3 is a diagram showing the lightweight floor impact sound insulation performance of the sound-insulating floor material for direct tension of FIG. In the figure, ○ indicates Example 1 and ● indicates Comparative Example 1.
Is.

FIG. 4 is a diagram showing the heavy floor impact sound insulation performance of the direct soundproof flooring material of FIG. In the figure, ○ indicates Example 1 and ● indicates Comparative Example 1.
Is.

[Explanation of symbols]

Reference numeral 1 is a cushioning material, 2 is an upper layer, 3 is an intermediate layer, 4 is a lower layer, 5 is a floor material, 6 is a first layer, 7 is a second layer, 8 is a third layer, and 9 is a fourth layer.
Layers and 10 are kerfs.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshihiko Nishimura             2-8-1 Iida-cho, Iwakuni City, Yamaguchi Prefecture Sanyo Kokusaku             Inside Pulp Co., Ltd.

Claims (4)

[Claims] 1. A cushioning material to be attached to the back surface of a floor material,
A cushioning material for a sound insulation floor material, which comprises an upper layer made of a foamed plastic material having a high expansion ratio, a middle layer made of a fibrous material, and a lower layer made of a foamed plastic material having a low expansion ratio, which are sequentially laminated. 2. The natural frequency of the upper layer is 500 / √2 Hz or less, and the natural frequency of the middle layer is 250 / √2 Hz.
The cushioning material for a soundproof floor material according to claim 1, which is as follows. 3. The natural frequency of the entire cushioning material is 125 / √2
The cushioning material for a soundproof floor material according to claim 1, which has a frequency of Hz or less. 4. A soundproof flooring material for direct tensioning, characterized in that the cushioning material according to any one of claims 1 to 3 is attached to the back surface of the flooring material.