JP2580336Y2 - Soundproof flooring - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproofing flooring material having excellent soundproofing and load deflection properties, and is used as a flooring material for a house (particularly, an apartment house).

[0002]

2. Description of the Related Art In recent years, the number of tatami mats has decreased due to the westernization of lifestyles, and flooring floors in which flooring materials are laid on concrete floors have increased. However, recently, complaints about daily noises such as pianos, stereos, footsteps of children, etc. that occur in daily life are increasing, especially in apartments such as apartments and condominiums, from the floor on the upper floor. The sound of jumping children, dragging chairs, and falling sounds of tableware has become a serious problem. Therefore, conventionally, a floor is of a floating floor type, and a sound-absorbing floor material is used in a direct-attached type in which a floor material is directly laid on a concrete floor surface. The direct-attached sound-insulating floor material (referred to as a first sound-insulating floor material) is composed of, for example, a plywood layer and a buffer layer. The plywood layer is made of plywood or a plastic plate. Also, there is known a single-layer nonwoven fabric formed by matting a foam or fiber such as a rubber sponge or the like with a needle punch.
Furthermore, (referred to. The second insulating floor members) Other sound-insulating floor members, and bonding the carpet anti-vibration sheet having a buffer layer such as expanded plastic foam or rubber on the back of the laminate has service down Deutch plywood and It is known to provide two types of voids having a predetermined shape (Japanese Utility Model Application Laid-Open No. 63-19043).
No. 8).

[0003]

In the floating floor type, the floor material is laid by floating from a concrete floor surface. The floating floor type has a disadvantage that it is not suitable for renovation of a house because the position of the floor material surface is high, and it is structurally expensive. On the other hand, in the above-mentioned upholstered soundproof flooring,
The thickness of the soundproof flooring can be reduced to about 2 cm, and it is structurally inexpensive, which is advantageous for new construction and home renovation. However, in the first sound-insulating floor material, when the foam material is used for the buffer layer, the sound insulation class against light impact sounds such as walking sounds or falling sounds of tableware is about L-55 (JIS A-1418 Buildings). In accordance with the method for measuring the floor impact sound level in the field), and a sufficient soundproofing effect cannot be obtained. The sound insulation grade recommended by the Architectural Institute of Japan is L
−45. In addition, when the single-layer nonwoven fabric is used, the amount of deflection of the floor surface during walking becomes too large, and there is a problem that walking sensation cannot be said to be good. In addition, the amount of deflection of the floor surface on which a good walking feeling is obtained is usually 0.5 to 4.8 mm.
Degree. Further, the second soundproof floor material has a problem that its structure is complicated, its thickness is increased, and its weight is also increased.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a direct-attached soundproof flooring material which has a simple structure and is lightweight and has excellent soundproofness against walking noise and walking sensation. .

[0005]

The sound-insulating flooring material of the first invention is a sound-insulating flooring material comprising a plywood layer and a buffer layer joined to a lower layer of the plywood layer via an adhesive layer, The buffer layer is formed by joining at least one napped non-woven fabric layer in which the surface fibers are napped in a loop shape by heat welding.
At least one heat-treated nonwoven fabric layer is joined in an appropriate order and arrangement. Book second
The soundproof flooring material of the present invention is a soundproofing flooring material including a plywood layer and a buffer layer joined to the lower layer of the plywood layer via an adhesive layer, wherein the buffer layer includes heat-welded fibers and has a surface. At least one napped nonwoven fabric in which fibers are napped in a loop and at least one heat-treated nonwoven fabric containing heat-welded fibers are arranged in an appropriate order and arrangement.
A bonding non-woven fabric containing 0% by weight or more (including 100% by weight) of heat-bonded fibers is inserted, and these are integrally heated .
The above-mentioned raised non-woven fabric and the above-mentioned heat-treated non-woven fabric
And each non the adhesive nonwoven fabric causes thermally welded
Each non- woven fabric described above is joined by joining the constituent fibers of the woven fabric.
Piloerection type nonwoven layer each from the cloth, the heat treatment type nonwoven layer and to form a heat-bonding layer, and on contact with the pile-type nonwoven layer and the heat treatment type nonwoven fabric layer and each of these nonwoven fabric layers
A serial thermal adhesive layer is thermally welded to each other, characterized in that a <br/> structure obtained by integrally joined.

(1) Plywood layer The plywood layer in the present invention is used not only for soundproofing and durability but also for improving aesthetic appearance, and various plywoods conventionally used for flooring can be used. For example, the surface of the plywood layer is a veneer, a veneer veneer, a wood-based plywood that is a cork board, a plastic board, and the like. Also, in order to improve soundproofing,
It may be of a type obtained by laminating a grooved plywood or a perforated plywood on the back surface or the like, or a type having a vibration damping layer provided between plywood layers. As the vibration damping layer, a vibration damping sheet, a buffer sheet, a sheet having a sound insulating property may be used, and rubber, plastic, asphalt, non-woven fabric, or the like may be used as the material. The thickness of the plywood layer varies depending on the type of the plywood layer, but is usually about 5 to 12 mm. Further, the plywood layer, for connecting the sound-insulating floor members to each other, may be processed molded ridges and grooves on the sides.

(2) Buffer Layer The buffer layer in the present invention may have at least one napped nonwoven layer and at least one heat-treated nonwoven layer, and the number of laminated nonwoven layers may be two or more . Ma
And, the number of the number of pile-type nonwoven layer heat treatment type nonwoven layer
May be the same or different. For example, as shown in FIG. 5, the number of nonwoven fabric layers may be three or more. However, if the number of nonwoven fabric layers is increased, the entire soundproofing floor material becomes too thick, and the price increases, which is not practical. Therefore, two to three layers are preferable. When increasing the number of layers, the thickness of the entire floor is reduced to reduce the thickness of each floor, or the content of heat-welded fibers is increased so that the amount of deflection does not become too large. Its hardness can be increased.

Further, the order of lamination of the pile type nonwoven layer and the heat treatment type nonwoven layer further arranged that either the front and back of the (up and down) on either side is not particularly limited. For example, the stacking order may be such that either of the nonwoven fabric layers is on the plywood layer side, and either side may be arranged on top. That is, as shown in FIG. 1, a plywood layer, a napped nonwoven fabric layer, and a heat-treated nonwoven fabric layer may be sequentially laminated, or as shown in FIG. 2, the nonwoven fabric layers may be arranged in reverse. Further, the raised side of the napped nonwoven fabric layer may be arranged so as to face in the opposite direction to the plywood layer side as shown in FIGS. 1 and 2, or in the opposite direction as shown in FIGS. 3 and 4. It may be arranged. Furthermore, various combinations of other stacking orders and arrangement directions can be adopted.

The above-mentioned nap-type nonwoven fabric layer is formed, for example, of the second invention.
As described above. This standing hair type
As a woven cloth , a mat is formed by entanglement of the fibers into a mat shape, and the fibers are extruded to the surface in a loop shape by a punching process in which a fork needle is pierced from one surface, or a mat formed by entanglement of the main fibers and heat-welded fibers having a lower melting point than the main fibers. After extruding the fibers into a loop by punching from one side with a fork needle, the whole is passed through hot air to melt the heat-welded fibers and welded (fused) to the main fibers. be able to. In addition, the napped nonwoven fabric may not contain the heat-welded fiber, or may be made of the heat-welded fiber as in the second invention.
May be included . The height of the loop constituting the napped type nonwoven layer 2~4mm is preferred. If it is less than 2 mm, the soundproofing properties will be reduced, and if it is more than 4 mm, the deflection will increase and the walking feeling will deteriorate.

The above-mentioned heat-treated nonwoven fabric layer is, for example, as described in
By heating the " heat-treated nonwoven fabric "
It is formed. This heat-treated nonwoven fabric is composed of main fibers and heat-welded fibers dispersed in the main fibers. As the heat-welded fiber, a core-sheath type (the core fiber does not melt due to its high melting point, and only the sheath part melts due to its low melting point) or disappears (the fiber itself is made of a low melting point material, After melting, it exists as a comb ball at the contact portion between the main fibers and bonds the fibers together.) This non-woven fabric is usually obtained by entanglement of the mixed fibers with a needle punch to form a mat, and then passing the whole through hot air to melt the surface of the heat-welded fiber or the welded fiber itself and weld it to the main fiber. It is. The content of the heat-welded fiber in the mixed fiber is preferably 5 to 50% by weight (particularly 10 to 20% by weight). If the content of the heat-welded fiber is less than 5%, the amount of deflection of the sound-insulating flooring material becomes too large, while if it exceeds 50%, the sound-proofing effect tends to deteriorate. In the case the content of this is 10 to 20 wt% balance of both performance is particularly good. The heat-welded fibers are preferably 2 to 20 denier.
Incidentally, in the case where the nap-type nonwoven fabric comprises heat welding fibers also, and preferably the preferred blending ratio of the heat welding fibers
The fineness is the same as in the case of the heat-treated nonwoven fabric .

In the above invention, the material of the fibers constituting the above-mentioned raised non-woven fabric layer and heat-treated non-woven fabric layer is usually
It is made of synthetic resin fibers such as polypropylene and polyester fibers, but is not limited thereto. Incidentally, polyester fibers are preferred in terms of heat resistance, weather resistance and the like. The main fibers and the heat-welded fibers constituting both nonwoven fabric layers may be of the same material or may be different. Furthermore, the fineness of each fiber is preferably 2-110 denier. This is because the main fibers increase the fineness of the (thicker) whereas the acoustic insulation becomes large enough to walking feeling is impaired.
Each of the above nonwoven fabric layers (or the nonwoven fabric used to form the nonwoven fabric layer ) is formed by punching
However, the present invention is not limited to this , and may be formed by bonding with latex and another adhesive or heat welding. The basis weight of the buffer layer (both nonwoven fabric layers, that is, both nonwoven fabrics) is 100 to 150.
0 g / m ² is preferred.

Regarding the thickness of the buffer layer and each nonwoven fabric layer,
The thickness of the napped nonwoven fabric layer is preferably about 3 to 12 mm, and the thickness of the heat-treated nonwoven fabric layer is preferably about 2 to 12 mm. The thickness of the buffer layer varies depending on the number of nonwoven fabric layers and the like.
mm is preferable. Bonding method between the nonwoven layer by adhesive or heat sealing. As the adhesive, latex, rubber, rubber-like plastic, vinyl acetate resin, epoxy, hot melt adhesive, and the like can be used. In the case of heat sealing is generally composed of a mixed fiber containing only or it the heat welded non-woven fabric (practically Xin
Equivalent to the "non-woven fabric for bonding" described in the claims
You. ) Or by heat-pressing with a woven fabric interposed.

(3) Adhesion of plywood layer and buffer layer Adhesion of the plywood layer and the buffer layer is performed with an adhesive. As the adhesive, a latex-based, rubber-based, rubber-like plastic-based, vinyl acetate resin-based, epoxy-based, urethane-based, acrylic or hot melt resin-based adhesive is used.
It is to be noted that the adhesive, Ru Ah in the sense to include an adhesive.

[0014]

As described above, the sound-insulating flooring material of the present invention has a multi-layered buffer layer, and the buffer layer has at least one napped nonwoven layer in which the surface fibers are napped in a loop .
The loop-shaped fibers of the above-mentioned nap-type nonwoven fabric layer are used for weight during walking.
By being more deformed , the soundproof flooring material of the present invention is excellent in load deflection characteristics and can improve walking sensation. In this buffer layer, the constituent fibers are joined by heat welding.
Since the heat treatment type nonwoven fabric layer is provided, it is possible to prevent the deflection amount from becoming too large and to improve the soundproofing. Therefore, according to the soundproof floor material of the present invention ,
While maintaining soundproofing, the amount of deflection can be made moderate, and the performance of each can be synergistically derived.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to embodiments. Example 1 As shown in FIG. 1, the flooring material of the present example has a plywood layer 1 and a buffer layer (thickness: 8 mm) composed of a napped nonwoven layer 21 and a heat-treated nonwoven layer 22; 748 g / m ^2. ) 2). Then, the back side of the base portion 211 of the napped nonwoven fabric layer 21 and the plywood layer 1 are bonded (adhesive layer; 3), and the tip end side of the loop 212 of the napped nonwoven fabric layer 21 and the heat-treated nonwoven fabric layer 22 are connected. Adhered (adhesive layer; 4).

The plywood layer 1 is made of a wooden decorative plywood (thickness: 8 mm) having a thin decorative veneer on the surface, and a groove 11 having a width of 3 mm and a depth of 5 mm is formed on the bottom surface thereof. Is formed with a connecting ridge 12, and a connecting groove 13 is formed on the other end side. The adhesive layer 3 between the plywood layer 1 and the buffer layer 2 is formed of an adhesive (“Bond E350R”, manufactured by Konishi Corporation).

Further, the napped nonwoven fabric layer 21 is formed by heating a napped nonwoven fabric, and the heat-treated nonwoven fabric layer 22 is formed by heating a heat-treated nonwoven fabric. This napped nonwoven fabric layer 2
The nap-type nonwoven fabric for forming No. 1 is 20 to 40
It is composed of 85% of denier polyester fiber and 15% of 2 to 20 denier core-sheath type heat-welded fiber. The non-woven fabric is made by extruding the fiber into a loop with a needle punch and a fork needle, and further subjected to heat processing. is there. In addition, standing hair type
The height of the loop 212 in the nonwoven fabric layer 21 is about 4 mm
It is. Further, forming the heat-treated nonwoven fabric layer 22
The heat-treated nonwoven fabric is composed of 25% of the 20 to 40 denier polyester fiber, 60% of the 70 to 110 denier polyester fiber, and 15% of the 2 to 20 denier core-sheath type heat-welded fiber, It is a nonwoven fabric subjected to punching and heat processing. Both nonwoven fabric layers 21 and 22
The thermal bonding layer 4 for bonding the core is 2 to 20 denier.
The nap an adhesive nonwoven fabric made of 100% type heat welding fibers
Between the mold non-woven fabric and the heat-treated non-woven fabric,
Formed by thermal processing to heat them together.
Ri, both nonwoven layers 21 and 22 are bonded united by the heat-bonding layer 4. In addition, the above-mentioned napped nonwoven fabric and the above-mentioned heating
The above-mentioned heat processing when manufacturing each of the treated nonwoven fabrics, and
And / or the napped nonwoven fabric and the heat-treated nonwoven fabric
Insert non-woven fabric for bonding between them and heat them together
By the above-mentioned thermal processing, the constituent fibers of each nonwoven fabric layer are melted by heat.
Is being worn. That is, heat is applied between the constituent fibers of each nonwoven fabric layer.
They are joined by a joint formed by welding.

In order to evaluate the performance of the soundproof floor material of this embodiment, the light floor impact sound level (number of L) and the amount of deflection under a load of 80 kg were measured. According to the result, as shown in FIG. 6, the floor impact sound level is 46 dB, and the sound insulation class L-4
5 performance. The amount of deflection under a load of 80 kg was 4.80 mm. The floor impact sound level (L number) was measured according to JIS A-1418, a method of measuring the floor impact sound level at a building site. The deflection amount was measured by "Method for measuring displacement of short-term sound-insulated flooring due to short-term concentrated load" by the Japan Building Research Institute. That is, 450 × 45 on a steel plate
Use a flooring with a size of 0 mm,
The test specimen was horizontally fixed on a constant acceleration universal testing machine, and was loaded using two types of loading plates (50 mmφ, 25 mmφ) (loading speed: 10 mm / min. ５5 mm / min), and a load-displacement chart is obtained, from which the displacement at the time of loading of 80 kgf is read.

Example 2 In the flooring material of this example, as shown in FIG. 2, one surface of the heat-treated nonwoven fabric layer 22 was adhered to the plywood layer 1, and the other surface of the heat-treated nonwoven fabric layer 22 was raised. The napped nonwoven fabric layer 2 is adhered to the back side of the base portion 211 of the molded nonwoven fabric layer 21.
One of the loops 212 has a configuration in which the distal end side is exposed.
The thickness of the buffer layer 2 composed of both nonwoven fabric layers is 8 mm,
The basis weight is 780 g / m ² . The napped nonwoven fabric used is composed of 85% of the polyester fiber used in Example 1 of 20 to 40 denier, and 15% of the heat welded fiber used in Example 1 of 2 to 20 denier. Further, in the heat-treated nonwoven fabric, 25% of the polyester fibers used in Example 1 having a denier of 40 to 40, and 70 to 11
The polyester fiber of 0 denier is composed of 60%, and the thermally welded fiber of 2 to 20 denier is composed of 15%. Except for the above, the configuration was substantially the same as in Example 1, and the production and performance evaluation were performed in the same manner. The soundproof flooring material of this example had a floor impact sound level of 47 dB, equivalent to a sound insulation class of L-45, and had a deflection of 4.70 mm under a load of 80 kg.

[0020] EXAMPLE 3 This example flooring, as shown in FIG. 3, the nap-type nonwoven fabric layer 21 in Example 1 sides (up and down) arranged in the opposite bonded with the structure, i.e., piloerection type nonwoven layer 21 The tip of the loop 212 is adhered to the plywood layer 1 and the back side of the base portion 211 of the napped nonwoven fabric layer 21 is adhered to one surface of the heat-treated nonwoven fabric layer 22. It has the same configuration as The thickness of the buffer layer 2 composed of both nonwoven fabric layers is 8 mm, and the basis weight is 750 g / m ² . In addition, an adhesive is applied to the loop surface of the napped nonwoven fabric layer 21, dried, and then heated and pressed to be bonded, so that only the loop end is selectively bonded to the plywood layer 1. The soundproof flooring material of this example had a floor impact sound level of 46 dB, equivalent to sound insulation class L-45, and had a deflection of 4.70 mm under a load of 80 kg.

Embodiment 4 As shown in FIG. 4, the floor material of this embodiment has a structure in which the napped nonwoven fabric layer 21 of the second embodiment is arranged upside down and adhered, that is, the loop 212 of the napped nonwoven fabric layer 21 is formed. The distal end side is configured to be adhered to one surface of the heat-treated nonwoven fabric layer 22, and the other configuration is the same as that of the second embodiment. The thickness of the buffer layer 2 composed of both nonwoven fabric layers is 8 mm, and the basis weight is 778 g /
a m ^2. The soundproofing floor material of the fourth embodiment has a floor impact sound level (number of L) of 47 dB, which is equivalent to the sound insulation class L-45,
The amount of deflection under a load of 80 kg was 4.70 mm.

COMPARATIVE EXAMPLE 1 The soundproof flooring material of this comparative example was formed by foaming polyethylene (thickness: 8 mm, density: 3) on the back surface of the wood decorative plywood used in Example 1.
It is a wooden soundproof flooring material having a structure in which a cushioning material of 0 kg / m ³ ) is attached. As this adhesive, the same adhesive as in Example 1 was used. The soundproofing floor material of this comparative example has the above floor impact sound level of 57 dB, a sound insulation rating of L-55, and 80 kg.
The amount of deflection under load was 2.70 mm.

Comparative Example 2 The soundproof flooring material of this comparative example has a structure in which a cushioning material of a rubber sponge is attached to the back surface of the woody plywood used in Example 1 using the same adhesive as in Example 1. It is a wooden soundproof flooring material.
This rubber sponge is a blend polymer of natural rubber and SBR (styrene-butadiene rubber), and has a maximum thickness of 8 mm, and a profile processing in which uneven portions are formed vertically and horizontally (pitch unit: about 20 mm, recess depth: about 6 mm) ) Changes the thickness. The soundproof flooring material of this comparative example had the floor impact sound level of 55 dB, the sound insulation class of L-55, and the amount of deflection under a load of 80 kg of 4.05 mm.

Comparative Example 3 The soundproof flooring material of this comparative example was prepared by embedding a cushioning material made of a single-layer nonwoven fabric (basis weight: 408 g / m ² , thickness: 8 mm) on the back of the wood decorative plywood used in Example 1. This is a wood-based soundproof flooring material having a structure bonded with the same adhesive as in Example 1. This single-layer nonwoven fabric is composed of 15% of fibers of 2 to 6 denier of polypropylene, 20% of fibers of 20 to 40 denier,
Fibers composed of 65% of 40 to 60 denier fibers are entangled with a needle punch into a mat shape.
The soundproof floor material of this example has a floor impact sound level (number of L) of 49.
In dB, the sound insulation rating is L-50. The amount of deflection under a load of 80 kg was 6.95 mm.

Effects of Examples and Comparative Examples From the above results, in Comparative Examples 1 and 2, although the deflection amounts are almost satisfied with 2.70 and 4.05 mm, the floor impact sound level is 55 to 57 dB. Insulation grade L-5
It is about 5 and the soundproofing is very poor. In Comparative Example 3, although the floor impact sound level was 49 dB, which was considerably improved as compared with Comparative Examples 1 and 2, the sound insulation class L was still low.
About -50, the soundproofing is not sufficient, and the deflection is too large at 6.95 mm, which is not excellent in walking sensation. Therefore, none of the comparative examples is excellent in balance between soundproofing and walking feeling.

On the other hand, the soundproof floor materials of Examples 1 to 4 have a floor impact sound level of 46 to 47 dB, have excellent soundproofness, and
The amount of deflection under a load of g was as good as 4.7 to 4.8 mm, all of which satisfied the required performance and were very well balanced. Further, since the other nonwoven fabric is integrally heated using the bonding nonwoven fabric made of the heat-welded fiber, the whole buffer layer has excellent integrity. Furthermore, a soundproof flooring material having desired performance can be easily produced depending on the content of the heat-welded fiber, the thickness of each nonwoven fabric, and the number of layers.

It should be noted that the present invention is not limited to the specific embodiments described above, but can be variously modified within the scope of the present invention according to the purpose and application.

[0028]

[Effects of the Invention] As described above, the soundproof flooring material of the present invention is excellent in both soundproofness and walking feeling, very well-balanced, and can secure first-class quality according to the standards of the Architectural Institute of Japan. It can be used safely even in the case of houses.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of a soundproof flooring material according to a first embodiment.

FIG. 2 is an explanatory sectional view of a soundproof flooring material according to a second embodiment.

FIG. 3 is an explanatory sectional view of a soundproofing floor material according to a third embodiment.

FIG. 4 is an explanatory sectional view of a soundproof flooring material according to a fourth embodiment.

FIG. 5 is an explanatory sectional view of a soundproof flooring material provided with three nonwoven fabric layers as a buffer layer.

FIG. 6 is a graph showing the floor impact sound blocking performance of the soundproof flooring material according to Example 1.

[Explanation of symbols]

1; plywood layer, 11; groove, 12; connecting ridge, 13; connecting groove, 2; buffer layer, 21; nap-type nonwoven fabric layer, 22;
Heat-treated nonwoven fabric layer, 211; base portion of napped nonwoven fabric layer, 212; loop of napped nonwoven fabric layer, 3; adhesive layer ,
4: heat bonding layer .

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Satoshi Kondo 3-1-136 Imaike-cho, Anjo-shi, Aichi Prefecture Inoac Corporation Anjo Works (58) Field surveyed (Int.Cl. ⁶ , DB name ) E04F 15/04 601 E04F 15/18 602 B32B 5/02 B32B 21/10

Claims (5)

(57) [Scope of request for utility model registration] 1. A soundproof flooring material comprising: a plywood layer; and a buffer layer joined to a lower layer of the plywood layer via an adhesive layer, wherein the buffer layer raises fibers on the surface in a loop. In addition, at least one napped nonwoven fabric layer and the constituent fibers are bonded by heat welding.
At least one heat-treated nonwoven fabric layer bonded together ,
Are joined in an appropriate order and arrangement. 2. A soundproofing flooring material comprising: a plywood layer; and a buffer layer joined to a lower layer of the plywood layer via an adhesive layer, wherein the buffer layer includes heat-welded fibers and reduces surface fibers. At least one napped non-woven fabric and at least one heat-treated non-woven fabric containing heat-welded fibers arranged in a loop are arranged in an appropriate order and arrangement, and at least 80% by weight ( 10
0% by weight. ) And interposed an adhesive nonwoven fabric comprising thermal welding fiber, it said start by heating them integrally
Hair-type non-woven fabric, heat-treated non-woven fabric and non-woven fabric for bonding
Each pile type nonwoven layer from above the nonwoven fabrics by bonding between constituent fibers of each nonwoven fabric with the fabric is thermally welded, the heat treatment type nonwoven layer and of forming a thermal adhesive layer
It was, in the configuration which has integrally joined with and between the heat-bonding layer in contact with the pile-type nonwoven layer and the heat treatment type nonwoven fabric layer and each of these nonwoven fabric layer is heat welded to each other <br/> A soundproof flooring material characterized by that. 3. The content of the heat-welded fibers constituting the napped nonwoven fabric and the heat-treated nonwoven fabric is 5%.
The sound-insulating flooring material according to claim 2, wherein the amount is from 50 to 50% by weight. 4. A fineness of the fibers constituting the pile-type nonwoven layer and heat treatment-type nonwoven layer, sound-insulating floor members according to any one claim from claim 1 is from 2 to 110 denier 3. 5. A sound-insulating floor members of any or claim <br/> wherein a height of the loop constituting the napped type nonwoven layer claim 1 which is 2-4 mm 4.