JP2572146Y2 - Soundproof carpet - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a soundproof carpet laid on a concrete floor or a wooden floor of an apartment, an apartment, an office or the like.

(Prior Art) Conventionally, a carpet 10 as shown in FIG. 4 is laid on a floor of an apartment or the like for decoration, heat insulation, soundproofing, and the like. The carpet 10 has a surface layer 12 made of wool fabric,
Double structure with backing layer 14 made of asphalt or plastic sheet, or its backing layer 14
Has a three-layer structure in which a protective layer (not shown) made of a non-woven fabric is further laminated on the back surface.

In addition, Japanese Utility Model Laid-Open No. 63-201720 discloses that in the above three-layer structure, closed cells having a plurality of through-holes and a foaming ratio of 5 to 40 times for the purpose of improving compression recovery and dimensional stability. A buffer sheet has been proposed in which a semi-rigid resin foam is provided with a coating layer of resin, rubber, asphalt, or the like.

However, since the carpet 10 has poor soundproofing properties, so-called floor impact sounds such as human walking sounds, jumping sounds, stereo sounds, or door opening and closing sounds are easily transmitted to a room downstairs, and a cushion provided to pedestrians. Since it is hard to say that the feeling is good, improvement has been demanded.

(Problems to be Solved by the Invention) In view of the above points, the invention has an excellent soundproofing effect that makes it difficult to transmit so-called floor impact sounds such as a human walking sound and a jumping sound to a room downstairs. Another object of the present invention is to provide a soundproof carpet having a moderate cushioning property.

(Means for Solving the Problems) The gist of the present invention for solving the above problems is that a surface layer made of a fabric such as woolen fabric, a backing layer made of an asphalt or plastic sheet laminated on the back surface, and a back surface of the backing layer A soundproof carpet in which a buffer layer is laminated, wherein the buffer layer is laminated over the entire back surface of the backing layer, and has a thickness of 1 to 5 mm, and a foaming ratio of 80 to 120 times. A soundproof carpet characterized in that:

(Operation) The surface layer has an effect of reducing floor impact sounds such as walking sounds in addition to decoration and heat retention. The backing layer gives the carpet an appropriate shape-retaining property, has an effect of facilitating the handling of the carpet when storing the carpet or carrying the carpet, and an effect of insulating noise. The buffer layer, on the other hand, absorbs and absorbs the vibration that has passed through the surface layer and the backing layer by its closed cell structure. Furthermore, since the buffer layer is laminated over the entire surface, the backing layer is formed on the lower surface of concrete or the like. To prevent direct contact with
In addition to relaxing and absorbing the propagation of the micro-vibration generated by the impact sound, there is an effect of being able to more effectively cut off the vibration and an effect of improving the cushioning property given to the pedestrian. In particular, its cushioning properties are extremely good because the foam constituting the cushioning layer has a closed-cell structure, and is superior in load-bearing properties as compared with those with an open-cell structure, and is not easily crushed or thinned by weight during walking or the like. It is something.

(Example) Hereinafter, an example of the present invention will be described.

FIG. 1 is a sectional view of a soundproof carpet according to an embodiment of the present invention.

The soundproof carpet 16 has a three-layer structure including a surface layer 18 made of a woolen fabric, a backing layer 20 made of asphalt or a plastic sheet, and a buffer layer 22 made of a foam having a closed cell structure.

The fabric constituting the surface layer 18 may be either a woven fabric or a knitted fabric, and an optimal fabric is selected according to the atmosphere of the place where the soundproof carpet 16 is laid (such as a corridor or room).

The asphalt or plastic sheet constituting the backing layer 20 is usually about 2 to 6 mm thick. Further, whether to use asphalt or a plastic sheet is appropriately selected depending on equipment for manufacturing the soundproof carpet 16 and the like. For example, a soundproof carpet when asphalt is used as the backing layer 20
In the production of 16, the heat-softened asphalt is provided in a layer on the back surface of the surface layer 18, and the buffer layer 22 is further placed on the softened asphalt surface, and on both sides of the asphalt by the adhesiveness of the softened asphalt. This is performed by bonding the surface layer and the buffer layer. Heat softening (melting) of asphalt is usually performed at 150 to 180 ° C., and the asphalt is appropriately filled with a filler. On the other hand, when a plastic sheet is used as the backing layer 20, the soundproof carpet 16 is used.
The production of the plastic sheet is performed by applying an adhesive to both surfaces of the plastic sheet to bond and integrate the surface layer 18, the backing layer 20 and the buffer layer 22, or by applying a vinyl chloride resin disposed on the back surface of the surface layer 18 to 150 ° C. It can be performed by baking at a degree. Various plastic sheets can be used for the backing layer 20, but a vinyl chloride resin sheet having a high density is particularly preferable because of its excellent sound insulation.

As a foam having a closed cell structure constituting the buffer layer 22,
Polyethylene foam or polypropylene foam, etc. can be used, and among them, the polypropylene foam having a foaming ratio of 80 to 120 times, especially 100 times, has a closed cell structure, which not only has a vibration-proof property but also a cushioning property. It is also preferable because of its excellent load bearing capacity. The thickness of the buffer layer 22 depends on the material of the foam forming the buffer layer 22,
Or the floor material on which this soundproof carpet 16 is laid,
For example, although it depends on whether it is concrete or wooden, it is usually selected in the range of about 1 to 5 mm.

If a soundproof carpet with a strong waist is required, the buffer layer 22 may be formed by laminating a nonwoven fabric (for example, cold gauze) on the foam having the closed cell structure.

The soundproof carpet 16 having such a configuration is provided as it is or provided with an adhesive layer (not shown) such as a double-sided adhesive tape on the back surface of the buffer layer 22, and laid on a floor surface such as concrete through the adhesive layer.

 Next, the soundproof performance of the invented product will be described.

FIG. 2 shows a wool fabric for the surface layer 18 and a thickness for the backing layer 20.
3mm, and the asphalt density 1.3 g / m ^3, this and conceived products, the invented product and the surface layer when the buffer layer 22 was 3mm thick and 1mm thick polypropylene foam consisting expansion ratio 100 times the closed cell structure 4 shows the result of measuring the noise level according to JIS A 1418-1978 for the conventional product of FIG. 4 having the same backing layer. FIG. 3 shows the result of measuring the noise level of the invented product and the conventional product in the case where the backing layer 20 was made of a vinyl chloride resin sheet having a thickness of 3 mm and a density of 1.3 g / m ³ and the other components were the same as above. is there. The second
As can be seen from Fig. 3 and Fig. 3, this device is only 1m.
It can be seen that even a very thin m is significantly more soundproof than conventional products.

In addition, the foam of the closed cell structure constituting the buffer layer 22,
When the sound pressure level was measured in the same manner as described above for the invented product made of another material, for example, polyethylene foam, an improvement in soundproofing was found as compared with the conventional product.

(Effect) Since the soundproof carpet of the present invention has the above-described configuration, it is extremely excellent in soundproofing against noise such as a floor impact sound such as a human walking sound and a jumping sound, and prevents noise downstairs in an apartment or the like. It is excellent in cushioning properties for pedestrians and comfortable.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a soundproof carpet according to an embodiment of the present invention, FIGS. 2 and 3 are diagrams showing soundproof performance of a product according to the present invention and a conventional product, and FIG. It is sectional drawing. 16 ... Soundproof carpet, 18 ... Surface layer 20 ... Backing layer, 22 ... Buffer layer

Continued on the front page (72) Inventor Hiromi Wada 3-1-136 Imaikecho, Anjo-shi, Aichi Prefecture Inoac Corporation Anjo Office (72) Inventor Satoshi Kondo 3-1-136 Imaikecho, Anjo-shi, Aichi Prefecture Inoac Corporation Anjo Office (72) Inventor Hiroyuki Nishimura 3-36 Imaikecho, Anjo-shi, Aichi Prefecture Inoac Corporation Anjo Office (56) References Special Tables Sho 62-502745 (JP, A) ) Japanese Utility Model Sho 62-162135 (JP, U) Japanese Utility Model Sho 36-26185 (JP, Y1)

Claims (1)

(57) [Scope of request for utility model registration] 1. A soundproof carpet having a surface layer made of a fabric such as woolen fabric, a backing layer made of asphalt or a plastic sheet laminated on the back surface thereof, and a buffer layer laminated on the back surface of the backing layer.
A soundproof carpet, wherein the buffer layer is laminated over the entire back surface of the backing layer, and is made of a foam having a closed cell structure having a thickness of 1 to 5 mm and an expansion ratio of 80 to 120 times.