JP2005334435A - Sound absorbing carpet and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound absorbing carpet capable of obtaining an excellent sound absorbing feature and maintaining a sufficient water barrier. <P>SOLUTION: The sound absorbing carpet comprises a sound absorbing nonwoven fabric layer 6 integrally bonded with the lower face side of an outermost material layer 10 via a bonding film layer 5 consisting of a thermoplastic resin, wherein thick fibers with 11-220 decitex are employed for a part of constitutional fibers of the nonwoven fabric layer 6 and a plurality of ventilation holes are provided on the film layer 5 through contact with the thick fibers. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sound-absorbing carpet suitably used as an automobile carpet and a method for manufacturing the same.

Conventionally, floor carpets have been laid on floors in automobiles for the purpose of improving the feeling of stepping and preventing vibration from the floor from being transmitted. By the way, although noise from the outside enters the automobile, such noise is reduced to some extent by the floor carpet, but the reduction amount is not sufficient. Therefore, such a floor carpet for automobiles has been required to have a sound absorbing performance, and as such, for example, a structure in which a nonwoven fabric is laminated and integrated on the back surface side of a carpet skin material ( Patent Document 1) is known. In this configuration, since a nonwoven fabric is used, noise such as noise is absorbed when passing through the nonwoven fabric layer, and a certain level of sound absorption effect is obtained.
JP 2002-200747 A (Claims 1 and 3)

  In recent years, in order to improve the comfort in the automobile, it has been strongly demanded to further improve the quietness in the interior space of the automobile. However, the conventional floor carpet has a sufficient sound absorption effect. It was not at a level that could be said, and could not meet such a request.

  Furthermore, in the above conventional floor carpet, the water brought into the vehicle by wet shoes, umbrellas, etc. passes through the floor carpet and reaches the back side thereof, causing rust on the metal plate constituting the automobile floor. There was a problem of letting. That is, the conventional floor carpet has not been able to ensure sufficient water shielding.

  The present invention has been made in view of such a technical background, and an object of the present invention is to provide a sound-absorbing carpet capable of obtaining excellent sound-absorbing performance and ensuring sufficient water shielding properties and a method for manufacturing the same.

  In order to achieve the above object, the present invention provides the following means.

  [1] A sound-absorbing nonwoven fabric layer is bonded and integrated on the lower surface side of the skin material layer through an adhesive film layer made of a thermoplastic resin, and a thick portion of 11 to 220 decitex is formed on some of the constituent fibers of the sound-absorbing nonwoven fabric layer. A sound-absorbing carpet, wherein fibers are used, and a plurality of air holes are formed in the adhesive film layer by contact with the thick fibers.

  [2] The sound-absorbing carpet as recited in the aforementioned Item 1, wherein a part of the thick fibers penetrates into the adhesive film layer and is entangled therewith.

  [3] The sound-absorbing carpet according to the above item 1 or 2, wherein the first fibers of 1 to 10 dtex are used together with the thick fibers of 11 to 220 dtex as the constituent fibers of the sound absorbing nonwoven fabric layer.

  [4] The sound-absorbing carpet as recited in the aforementioned Item 3, wherein the sound-absorbing nonwoven fabric layer is formed of a nonwoven fabric in which the thick fibers are raised from the upper surface of the nonwoven fabric base layer formed by the thick fibers and the first fibers.

  [5] The sound-absorbing carpet according to the item 3 or 4, wherein the mixed mass ratio of the constituent fibers in the sound-absorbing nonwoven fabric layer is thick fiber / first fiber = 5/95 to 99/1.

[6] The sound-absorbing carpet according to any one of items 1 to 5, wherein the basis weight of the sound-absorbing nonwoven fabric layer is 150 to 1000 g / m ² .

[7] The sound-absorbing carpet according to any one of items 1 to 6, wherein the basis weight of the adhesive film layer is 5 to 300 g / m ² .

  [8] The sound-absorbing carpet according to any one of items 1 to 7, wherein the adhesive film layer contains the thermoplastic resin and a filler.

  [9] In any one of the preceding items 1 to 8, wherein the skin material layer is a carpet original fabric in which a pile is planted on the upper surface of the base fabric and a precoat treatment is performed on the lower surface of the base fabric The sound-absorbing carpet described.

  [10] The sound-absorbing carpet according to any one of items 1 to 8, wherein a needle punched nonwoven fabric is used as the skin material layer.

  [11] A non-woven fabric in which thick fibers of 11 to 220 dtex are used as part of the constituent fibers, an adhesive film made of a thermoplastic resin immediately after extrusion, and a skin material, which are superposed in this order, between a pair of rolls A method for producing a sound-absorbing carpet, characterized by being pinched with

  [12] As the non-woven fabric, a non-woven fabric in which the thick fibers are raised from the upper surface of the non-woven fabric base layer formed by the 11-220 decitex thick fibers and the 1-10 decitex first fibers is used. 12. The method for producing a sound-absorbing carpet according to 11 above, wherein the side where the thick fibers are raised is sandwiched between the pair of rolls in a state where the thick fiber is in contact with the adhesive film.

  [13] The method for producing a sound-absorbing carpet as described in 11 or 12 above, wherein a pressure roll is used for one of the pair of rolls and a cooling roll is used for the other.

  In the invention of [1], sound absorption is obtained by resonance absorption of the adhesive film layer, and a large number of air holes are formed in the adhesive film layer by contact with the thick fibers of the sound absorbing nonwoven layer, so that excellent sound absorption is achieved. Performance will be obtained. Moreover, since the thickness of the thick fibers is in the range of 11 to 220 dtex, the air holes formed in the adhesive film layer allow air to pass through but hardly permeate water, giving the carpet good water barrier properties. can do.

  In the invention [2], a part of the thick fibers penetrates into the adhesive film layer and is entangled therewith, so that the adhesive strength can be improved.

  In the invention of [3], since the first fibers of 1 to 10 dtex are used together with the thick fibers as the constituent fibers of the sound absorbing nonwoven layer, the sound absorbing performance can be further improved.

  In the invention of [4], since the thick fibers are raised from the upper surface of the nonwoven fabric base layer, when the thick fibers come into contact with the adhesive film layer during bonding, a large number of air holes are surely formed in the adhesive film layer. The sound absorbing performance can be further improved.

  In the invention [5], since the mixed mass ratio of the constituent fibers in the sound-absorbing nonwoven fabric layer is thick fiber / first fiber = 5/95 to 99/1, the sound absorbing performance can be further improved.

In the invention of [6], since the basis weight of the sound absorbing nonwoven fabric layer is set to 150 to 1000 g / m ² , the sound absorbing performance can be further improved.

In the invention of [7], since the basis weight of the adhesive film layer is set to 50 to 300 g / m ² , sufficient adhesive strength is obtained, and when the thick fibers come into contact with the adhesive film layer during bonding, the adhesive film As a result, air holes are surely formed in the layer, and excellent sound absorbing performance can be secured.

  In the invention of [8], since the adhesive film layer includes a filler, the adhesive film layer is more easily formed with a vent hole by contact with the thick fiber. That is, there is an advantage that the air holes are more easily formed by the inclusion of the filler.

  In the invention of [9], a carpet having a good treading feeling is provided.

  In the invention of [10], since the needle punched nonwoven fabric is used for the skin material layer, the sound absorbing performance can be further improved, and a sound absorbing carpet is provided at a low cost.

  In the invention [11], the sound-absorbing carpet according to the inventions [1] to [10] can be efficiently produced. The obtained sound-absorbing carpet is excellent in sound absorption due to the resonance absorption of the adhesive film layer, and this adhesive film layer has a large number of air holes formed by contact with the thick fibers of the sound-absorbing nonwoven fabric layer. Sound absorption performance can be obtained. Moreover, since the thickness of the thick fibers is in the range of 11 to 220 dtex, the air holes formed in the adhesive film layer pass air but hardly permeate water, and the carpet has good water shielding properties. .

  In the invention of [12], since the thick fibers are raised from the upper surface of the nonwoven fabric base layer, when the thick fibers come into contact with the adhesive film layer during bonding, a large number of air holes are surely formed in the adhesive film layer. This makes it possible to manufacture a sound-absorbing carpet that is more excellent in sound-absorbing performance.

  In the invention of [13], since a pressure roll is used for one of a pair of rolls and a cooling roll is used for the other, the adhesive is integrated and the adhesive layer is cooled and solidified by sandwiching between the pair of rolls. This can improve the production efficiency.

  One embodiment of a sound-absorbing carpet (1) according to the present invention is shown in FIG. In FIG. 1, (10) is a skin material layer, (5) is an adhesive film layer, and (6) is a sound-absorbing nonwoven fabric layer.

  The skin material layer (10) has a structure in which a pile (3) is planted on the upper surface of the base fabric (2) and a precoat layer (4) is formed on the lower surface of the base fabric (2) by precoating. It has air permeability. The skin material layer (10) and the sound-absorbing nonwoven fabric layer (6) are bonded and integrated through an adhesive film layer (5), and a non-slip resin layer (7) is provided on the lower surface of the sound-absorbing nonwoven fabric layer (6). Is provided.

  Thick fibers of 11 to 220 dtex are used as part of the constituent fibers of the sound-absorbing nonwoven fabric layer (6). In the present embodiment, the sound-absorbing nonwoven fabric layer (6) is formed from the upper surface of the nonwoven fabric base layer (20) formed by thick fibers (21) of 11 to 220 dtex and first fibers (22) of 1 to 10 dtex. It consists of the nonwoven fabric of the form where the thick fiber (21) was raised (refer FIG. 2). As shown in FIG. 2, the raised fiber (21) is not linearly raised, but is curved or bent into various shapes. Thus, the sound-absorbing nonwoven fabric layer (6) The upper surface of is formed in an uneven surface by thick fibers (21) raised.

  The adhesive film layer (5) has a thread formed when the thick fibers (21) of the sound-absorbing nonwoven fabric layer (6) come into contact with the adhesive film layer (5) during superposition for adhesion integration. Many pores are formed.

  Thus, in the sound-absorbing carpet (1), not only noise such as noise is absorbed by resonance absorption of the adhesive film layer (5), but also the adhesive film layer (5) is brought into contact with the thick fibers (21). Since many perforated vent holes are formed and have air permeability, an excellent sound absorbing performance can be obtained by these synergistic effects. Moreover, since the thickness of the thick fiber (21) is set in the range of 11 to 220 dtex, the air holes formed in the adhesive film layer (5) are those that allow air to pass but hardly allow water to pass. Thus, good water barrier properties can be obtained. Furthermore, in this embodiment, since the thick fibers (21) are raised from the upper surface of the nonwoven fabric base layer (20), that is, the thick fibers (21) protrude upward from the nonwoven fabric base layer (20). Therefore, a large number of air holes can be surely formed in the adhesive film layer (5), and there is an advantage that the sound absorbing performance can be further improved.

  In the present invention, the base fabric (2) is not particularly limited, and examples thereof include a spunbond nonwoven fabric, a needle punched nonwoven fabric, and a woven fabric. Among these, it is preferable to use a spunbonded nonwoven fabric. In this case, a larger number of voids communicating with the front and back surfaces are formed even when pre-coating (thread removal prevention treatment), and a further excellent air permeability is obtained. The sound absorbing performance can be further improved.

The basis weight of the base fabric (2) is preferably set to 90 to 150 g / m ² . If it is less than 90 g / m ^2, it is not preferable because it becomes difficult to plant the pile (3) on the base fabric (2) in a stable support state, and if it exceeds 150 g / m ² , air permeability cannot be obtained sufficiently and sound absorbing performance is obtained. Is unfavorable because it decreases.

Also, the basis weight of the pile (3) is preferably set to a range of 300~2000g / m ^2.

The precoat layer (4) comprises a resin layer formed by applying an emulsion or solution of synthetic resin or rubber. The adhesion amount (dry state) of the synthetic resin in the precoat layer (4) is preferably set to 50 to 150 g / m ² . If it is less than 50 g / m ^2, it is not preferable because sufficient pile pulling strength cannot be obtained and the pile is likely to be pulled out. ^{On the other hand} , if it exceeds 150 g / m ² , it is not preferable because sufficient air permeability cannot be obtained and the sound absorption performance is lowered.

  As the sound-absorbing nonwoven fabric layer (6), it is necessary that a thick fiber (21) of 11 to 220 dtex is used as a part of the constituent fibers. By using such thick fibers, the sound-absorbing nonwoven fabric is formed when the skin material layer (10) and the sound-absorbing nonwoven fabric layer (6) are overlapped with each other via the adhesive film layer (5) for adhesion integration. The thick fibers (21) of the layer (6) can come into contact with the adhesive film layer (5) to form a large number of air holes in the adhesive film layer (5).

  Especially, it is preferable to employ | adopt the structure by which the 1st-10 dtex 1st fiber (22) is used with the said 11-220 dtex thick fiber (21) as a constituent fiber of the said sound-absorbing nonwoven fabric layer (6). Sound absorption performance can be further improved by using 1 to 10 decitex first fibers (22).

  The combined mass ratio of the constituent fibers in the sound-absorbing nonwoven fabric layer (6) is preferably set to thick fiber / first fiber = 5/95 to 99/1. If the use ratio of the thick fibers (21) is less than the lower limit value, the number of air holes formed in the adhesive film layer (5) is decreased, and the sound absorbing performance is deteriorated due to the decrease in air permeability. Moreover, since the sound absorption effect of sound-absorbing nonwoven fabric layer (6) itself will fall when the usage-ratio of a 1st fiber (22) is less than the said lower limit, it is unpreferable. Especially, it is especially preferable that the combined mass ratio of the constituent fibers in the sound-absorbing nonwoven fabric layer (6) is set to thick fibers / first fibers = 10/90 to 70/30.

The basis weight of the sound-absorbing nonwoven fabric layer (6) is preferably set to 150 to 1000 g / m ² . If it is less than 150 g / m ² , a sufficient sound absorbing effect cannot be obtained. On the other hand, if it exceeds 1000 g / m ² , it is difficult to obtain sufficient air permeability and the sound absorbing performance is deteriorated.

  Although it does not specifically limit as a nonwoven fabric form of the said sound-absorbing nonwoven fabric layer (6), For example, a needle punch nonwoven fabric, a spun bond nonwoven fabric, etc. can be illustrated.

  The said adhesive film layer (5) is an adhesive layer which consists of a film made from a thermoplastic resin, and many ventilation holes drilled by contact with the said thick fiber (21) are formed. Although it does not specifically limit as said adhesive film, For example, a polyethylene film, a polypropylene film, etc. can be illustrated.

  The adhesive film layer (5) preferably comprises a film of a resin composition in which a filler is mixed with the thermoplastic resin. By containing the filler, the adhesive film layer (5) is made of thick fibers. This makes it easier to form a vent hole. Although it does not specifically limit as said filler, For example, calcium carbonate, barium sulfate, silica sand, magnesium hydroxide etc. are mentioned.

The basis weight of the adhesive film layer (5) is preferably set to 50 to 300 g / m ² . If it is less than 50 g / m ^2, it is not preferable because sufficient adhesive strength is difficult to obtain. On the other hand, if it exceeds 300 g / m ² , not only the sound absorption effect due to resonance absorption of the adhesive film layer (5) can be obtained sufficiently, but also an adhesive film. Since it becomes difficult to make a vent hole in the layer (5), it is not preferable.

The non-slip resin layer (7) is formed by applying a resin by, for example, a roller coating method or a spray method. The basis weight of the non-slip resin layer (7) is preferably set to 50 to 150 g / m ² .

  The sound absorbing carpet (1) of the present invention is manufactured, for example, as follows. First, a skin material (10) in which a pile (3) is planted on the upper surface of the base fabric (2) and a precoat layer (4) is formed on the lower surface of the base fabric (2) by a precoat treatment is prepared. Next, as shown in FIG. 3, while extruding the adhesive film (5) from the extruder (30), while supplying the skin material (10) from the left side of the drawing, the thick fibers (21 ) And the nonwoven fabric base layer (20) formed by the first fibers (22), the sound-absorbing nonwoven fabric (6) made of the nonwoven fabric in which the thick fibers (21) are raised are supplied from the upper surface, and the skin material (10) These are clamped between the pressure roll (31) and the cooling roll (32) in the state where the adhesive film (5) is interposed between the sound-absorbing nonwoven fabric (6). At this time, the side of the nonwoven fabric (6) where the thick fibers (21) are raised is brought into contact with the adhesive film (5), and the precoat layer (4) of the skin material (10) is bonded to the adhesive film (5). Place it in contact. Since the adhesive film (5) immediately after being extruded from the extruder (30) is in a melt-softened state, the skin material (10) and the sound-absorbing nonwoven fabric ( And 6) are bonded and integrated through the adhesive film (5). Thereafter, as shown in FIG. 3, the integrated product is conveyed along the outer peripheral surface of the cooling roll (32) to be cooled to obtain the sound absorbing carpet (1).

  Next, specific examples of the present invention will be described.

<Example 1>
SBR latex is pre-coated on the back of a fabric (2) made of spunbond nonwoven fabric made of PET (polyethylene terephthalate) with a basis weight of 100 g / m ² and tufted with a basis weight of 650 g / m ^{2 made} of polypropylene yarn (3). The precoat layer (4) having a dry basis weight of 75 g / m ² was formed by the treatment to obtain a skin material (10).

Next, as shown in FIG. 3, while extruding a polyethylene film (5) having a basis weight of 250 g / m ² from the extruder (30), while supplying the skin material (10) from the left direction in the drawing, the right direction in the drawing. The polyester nonwoven fabric (6) having a basis weight of 300 g / m ² is supplied from the above, and the pressure roll (31) is used with the adhesive film (5) interposed between the skin material (10) and the sound absorbing nonwoven fabric (6). The sound-absorbing carpet was obtained by bonding and integrating with the cooling roll (32). From the upper surface of the nonwoven fabric base layer (20) formed of 150 decitex thick fibers (21), 8 decitex first fibers (22) and 4 decitex first fibers (22) as the non-woven fabric (6). The nonwoven fabric (refer FIG. 2) of the form in which the said thick fiber (21) was raised was used. The mixed mass ratio of the constituent fibers in the nonwoven fabric (6) was 150 decitex thick fiber / 8 decitex first fiber / 4 decitex first fiber = 50/40/10. The nonwoven fabric (6) was laminated and bonded and integrated so that the side where the thick fibers (21) were raised was in contact with the polyethylene film (5). The polyethylene film (5) contains 32% by mass of calcium carbonate.

<Example 2>
From the upper surface of the nonwoven fabric base layer (20) formed of 30 dtex thick fibers (21), 6 dtex first fibers (22) and 4 dtex first fibers (22) as the nonwoven fabric (6), A non-woven fabric (see FIG. 2) in which the fibers (21) are raised, and the mixed fiber mass ratio is 30 decitex thick fiber / 6 decitex first fiber / 4 decitex first fiber = 50 / A sound-absorbing carpet (1) was obtained in the same manner as in Example 1 except that 40/10 was used.

<Example 3>
From the upper surface of the nonwoven fabric base layer (20) formed by 15 decitex thick fibers (21), 8 decitex first fibers (22) and 4 decitex first fibers (22) as the non-woven fabric (6), A non-woven fabric (see FIG. 2) in which fibers (21) are raised, and the mixed mass ratio of the constituent fibers is 15 decitex thick fiber / 8 decitex first fiber / 4 decitex first fiber = 60 / A sound-absorbing carpet (1) was obtained in the same manner as in Example 1 except that 30/10 was used.

<Example 4>
From the upper surface of the nonwoven fabric base layer (20) formed by 100 decitex thick fibers (21), 6 decitex first fibers (22) and 4 decitex first fibers (22) as the non-woven fabric (6), It is a nonwoven fabric (see FIG. 2) in which the fiber (21) is raised, and the mixed mass ratio of the constituent fibers is 100 decitex thick fiber / 6 decitex first fiber / 4 decitex first fiber = 40 / A sound-absorbing carpet (1) was obtained in the same manner as in Example 1 except that 50/10 was used.

<Example 5>
As the nonwoven fabric (6), the thick fibers (21) are raised from the upper surface of the nonwoven fabric base layer (20) formed by 150 decitex thick fibers (21) and 4 decitex first fibers (22). Example 1 except that a non-woven fabric (see FIG. 2) having a mixed mass ratio of constituent fibers of 150 decitex thick fiber / 4 decitex first fiber / = 90/10 was used. Thus, a sound absorbing carpet (1) was obtained.

<Example 6>
A sound-absorbing carpet (1) was obtained in the same manner as in Example 1 except that a polyethylene film (5) having a basis weight of 100 g / m ² was used.

<Comparative Example 1>
A sound-absorbing carpet (1) was obtained in the same manner as in Example 1 except that a polyester needle punched nonwoven fabric comprising 90 mass% of 6 dtex fibers and 10 mass% of 4 dtex fibers was used as the nonwoven fabric (6).

<Comparative example 2>
SBR latex is pre-coated on the back of a fabric (2) made of spunbond nonwoven fabric made of PET (polyethylene terephthalate) with a basis weight of 100 g / m ² and tufted with a basis weight of 650 g / m ^{2 made} of polypropylene yarn (3). The precoat layer (4) having a dry basis weight of 75 g / m ² was formed by the treatment to obtain a skin material (10).

Next, while transporting the skin material (10) at a constant speed with the pile surface facing down, a polyethylene powder having an average particle diameter of 400 μm is applied onto the skin material at a spray rate of 300 g / m ² , and then the powder is applied. After heating, a polyester needle punch non-woven fabric having a basis weight of 300 g / m ² is overlaid thereon (non-woven fabric consisting of 90 mass% of 6 dtex fiber and 10 mass% of 4 dtex fiber), and then pressurized with a cooling and pressure roll. A sound-absorbing carpet was obtained.

  Each sound-absorbing carpet obtained as described above was evaluated based on the following evaluation method.

<Sound absorption coefficient measurement method>
The sound absorption coefficient at each frequency was measured in accordance with the normal incidence method of JIS A1405.

<Air permeability measurement method>
The air permeability (cm ³ / cm ² / sec) was measured according to JIS L1096 8.27.1 A method.

<Water barrier evaluation method>
100 mL of room temperature water was gently placed on the upper surface (pile surface) of the sound-absorbing carpet and left in this state for 10 minutes. After 10 minutes, the water permeability to the carpet back was examined.

(Evaluation criteria)
“◎”… There was no water permeation to the back of the carpet and the back was dry. “○”… There was no water permeation to the back of the carpet, but the back was damp like a semi-dry state. △ ”… Almost no water permeated to the back of the carpet, but the back was wet with water.“ × ”… Permeated to the back of the carpet.

  As is apparent from the table, the sound absorbing carpets of Examples 1 to 6 of the present invention were excellent in sound absorbing performance and had good water shielding properties.

  In contrast, the sound-absorbing carpet of Comparative Example 1 configured using a non-woven fabric layer that does not use thick fibers of 11 to 220 decitex can obtain good water shielding properties, but has little air permeability and poor sound absorbing performance. It was. Further, in the sound-absorbing carpet of Comparative Example 2 in which the skin material layer and the nonwoven fabric layer were bonded and integrated with the powder, water permeated to the carpet back surface.

It is sectional drawing which shows one Embodiment of the sound-absorbing carpet of this invention. It is sectional drawing which shows the nonwoven fabric used for manufacturing the sound-absorbing carpet of this invention. It is explanatory drawing of the manufacturing method of the sound-absorbing carpet of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Sound absorption carpet 2 ... Base cloth 3 ... Pile 4 ... Precoat layer 5 ... Adhesive film layer 6 ... Sound absorption nonwoven fabric layer 7 ... Non-slip resin layer 10 ... Skin material layer 20 ... Nonwoven fabric base layer 21 ... Thick fiber 22 ... First fiber 31 ... Pressure roll 32 ... Cooling roll

Claims (13)

  A sound-absorbing nonwoven fabric layer is integrally bonded to the lower surface side of the skin material layer via an adhesive film layer made of a thermoplastic resin, and 11 to 220 dtex thick fibers are used as part of the constituent fibers of the sound-absorbing nonwoven fabric layer. A sound-absorbing carpet, wherein the adhesive film layer has a large number of air holes formed by contact with the thick fibers.   The sound-absorbing carpet according to claim 1, wherein a part of the thick fibers penetrates into and entangles with the adhesive film layer.   The sound-absorbing carpet according to claim 1 or 2, wherein the first fibers of 1 to 10 dtex are used together with the thick fibers of 11 to 220 dtex as the constituent fibers of the sound absorbing nonwoven fabric layer.   The sound-absorbing carpet according to claim 3, wherein the sound-absorbing nonwoven fabric layer is made of a nonwoven fabric in which the thick fibers are raised from the upper surface of a nonwoven fabric base layer formed by the thick fibers and the first fibers.   5. The sound-absorbing carpet according to claim 3, wherein a mixed mass ratio of the constituent fibers in the sound-absorbing nonwoven fabric layer is thick fiber / first fiber = 5/95 to 99/1. Sound absorbing carpet according to any one of claims 1 to 5 weight per unit area of the sound absorbing nonwoven fabric layer is 150~1000g / m ^2. Sound absorbing carpet according to any one of claims 1 to 6 weight per unit area of the adhesive film layer is 5~300g / m ^2.   The sound-absorbing carpet according to any one of claims 1 to 7, wherein the adhesive film layer contains the thermoplastic resin and a filler.   9. The carpet raw material according to claim 1, wherein a pile is planted on the upper surface of the base fabric and a pre-coating treatment is performed on the lower surface of the base fabric as the skin material layer. Sound-absorbing carpet.   The sound-absorbing carpet according to any one of claims 1 to 8, wherein a needle punched nonwoven fabric is used as the skin material layer.   A non-woven fabric in which thick fibers of 11 to 220 decitex are used as part of the constituent fibers, an adhesive film made of a thermoplastic resin immediately after extrusion, and a skin material are stacked in this order, and these are sandwiched between a pair of rolls. A method for producing a sound-absorbing carpet.   As the nonwoven fabric, a nonwoven fabric in which the thick fibers are raised from the upper surface of the nonwoven fabric base layer formed by the thick fibers of 11 to 220 dtex and the first fibers of 1 to 10 dtex is used. The method for producing a sound-absorbing carpet according to claim 11, wherein the napped side is sandwiched between the pair of rolls in a state where the napped side is in contact with the adhesive film.   The method for producing a sound-absorbing carpet according to claim 11 or 12, wherein a pressure roll is used for one of the pair of rolls and a cooling roll is used for the other.

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