JP2005215117A - Sound-absorbing/insulating multilayer fabric and sound-absorbing/insulating product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide sound absorbing/insulating fabric which has an excellent sound absorption characteristic and a sound insulation characteristic (transmission loss) without spoiling lightweight property, and provide a sound-absorbing/insulation product which uses such sound absorbing/insulation fabric. <P>SOLUTION: Disclosed is the sound absorbing/insulating multilayer fabric formed by laminating and integrating cloth (A) of 150 to 350 g/m<SP>2</SP>in weight per unit area and ≤10 cc/cm<SP>2</SP>/sec in air permeability and nonwoven fabric (B) of 50 to 200 g/m<SP>2</SP>weight per unit size and 0.6 to 3.3 dtx in mean single yarn fineness of constituent fibers. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a sound-absorbing and sound-insulating multilayer fabric that can be used as an interior material such as a curtain and a sound-proofing fabric for a construction site, has good sound-absorbing characteristics without impairing lightness, and has excellent sound-insulating characteristics (transmission loss). It is.

  Conventionally, various materials having sound absorption characteristics and sound insulation characteristics have been proposed as soundproof materials for vehicles, houses, highways, and construction sites. The sound absorption characteristic and the sound insulation characteristic are different properties. According to Non-Patent Document 1, the sound absorption characteristic is a characteristic in which the energy of sound incident on the material is lost as heat energy, while the sound insulation characteristic is air. By reflecting the propagating sound, the propagating sound is blocked and the transmitted sound is reduced.

  Examples of the material having sound absorbing characteristics include a sound absorbing material having a multilayer structure, and a sound absorbing material provided with rigidity by specifying the fineness and basis weight of fibers constituting each layer (for example, see Patent Document 1), density There has been proposed a sound-absorbing material (see, for example, Patent Document 2) imparted with sag resistance by arranging a fiber molding material having a difference in a sandwich mold.

On the other hand, as a material having sound insulation characteristics, for example, a high-strength fabric coated with a vinyl chloride resin (see, for example, Patent Document 3), or a curtain in which a plastic film and fine fabric are laminated (see, for example, Patent Document 4). )
However, a sound absorbing and insulating material having both a sound absorbing characteristic and a sound insulating characteristic has not been proposed so far, and the proposal has been desired. Furthermore, depending on the application, it has been desired to have light weight.

Title: Textbook Handbook 259, 796 Editor: Textile Society of Japan Publisher: Maruzen Co., Ltd. Publication date: March 25, 1994 JP 2001-207365 A JP-A-11-131356 JP-A-6-67677 Japanese Patent No. 3216044

  The present invention has been made in view of the above background, and an object of the present invention is to provide a sound-absorbing and sound-insulating multilayer fabric that has good sound-absorbing characteristics without impairing lightness and that has excellent sound-insulating characteristics (transmission loss), and such absorption. An object of the present invention is to provide a sound absorbing and insulating product using the sound insulating multilayer fabric.

  As a result of intensive studies to achieve the above-mentioned problems, the present inventors have obtained a desired sound-absorbing and sound-insulating multilayer fabric by laminating and integrating a low air permeability fabric and a non-woven fabric composed of fine fibers. As a result, the present invention has been completed.

Thus, according to the present invention, "basis weight is between 150 to 350 g / ^{m 2} and is and air permeability 10cc ^/ cm 2 ^/ sec or less of the fabric (A), having a basis weight of it and the constituent fibers are 50 to 200 g / ^{m 2} A sound-absorbing and sound-insulating multilayer fabric characterized in that the nonwoven fabric (B) having an average single yarn fineness of 0.6 to 3.3 dtex is laminated and integrated.

In that case, it is preferable that the fabric weight of the whole multilayer fabric is 300-600 g / m < ² >. Moreover, it is preferable that it is 2-10 mm as thickness of the whole multilayer fabric.

  In the sound absorbing and insulating multilayer fabric of the present invention, the fabric (A) is preferably composed of polyester fibers. Moreover, it is preferable that a nonwoven fabric (B) is comprised with a polyester-type fiber.

  When obtaining a sound absorbing / insulating product using the sound absorbing / insulating multilayer fabric of the present invention, it is preferable that the nonwoven fabric (B) is disposed on the sound source side because a particularly excellent sound absorbing / insulating effect is obtained.

  According to the present invention, a sound-absorbing / insulating multilayer fabric having good sound-absorbing characteristics without impairing lightness and excellent in sound-insulating properties (transmission loss), and a sound-absorbing / insulating product using such a sound-absorbing / insulating multilayer fabric are obtained. It is done.

Hereinafter, embodiments of the present invention will be described in detail.
In the sound-absorbing and insulating multilayer fabric of the present invention, the fabric (A) is a layer mainly contributing to the sound insulation characteristics. The fabric weight of the fabric (A) needs to be 150 to 350 g / m ² . When the fabric weight of the fabric (A) is smaller than 150 g / m ² , a sufficient sound insulation effect cannot be obtained, which is not preferable. On the contrary, if the basis weight is larger than 350 g / m ² , the lightness is impaired, which is not preferable.

Further, the air permeability of the fabric (A) needs to be 10 cc / cm ² / sec or less (preferably 1 to 9 cc / cm ² / sec). When the air permeability is higher than 10 cc / cm ² / sec, a sufficient sound insulation effect cannot be obtained, which is not preferable. The smaller the air permeability, the better the sound insulation effect. However, if the air permeability is too low, the production cost may increase, so it is preferably in the range of 1 to 9 cc / cm ² / sec.

  The fibers constituting the fabric (A) are not particularly limited, and known fibers such as polyester fibers, polyamide fibers, acrylic fibers, polypropylene fibers, aromatic polyamide fibers, and flame-resistant fibers are used. Among these, polyester fibers are preferably exemplified from the balance of handling workability, recyclability, performance, and price.

  Such polyester fibers include polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyhexamethylene terephthalate, polytetramethylene terephthalate, poly-1,4-dimethylcyclohexane terephthalate, polypivalolactone, and other components. Examples thereof include fibers made of a copolymerized copolymer. These fibers may be one type or a plurality of combinations. Further, a core-sheath type or side-by-side type composite fiber may be used. The polymer forming these fibers may include a fine pore forming agent, a cationic dye dyeing agent, a coloring inhibitor, a heat stabilizer, a fluorescent whitening agent, a glossy agent as necessary within the range not impairing the object of the present invention. One type or two or more types of eraser, colorant, hygroscopic agent, and inorganic fine particles may be contained.

  The fiber form of such fibers is not particularly limited, and may be long fibers (multifilament yarns) or short fibers (spun yarns). Among these, spun yarn is preferable in terms of adhesiveness when integrated with the nonwoven fabric. Furthermore, twisted yarn, air processing, and false twist crimping may be applied. The single yarn fineness and the total fineness of the fiber are not particularly limited, but in obtaining the above air permeability, the single yarn fineness is 0.1 to 10.0 dtex (more preferably 0.4 to 5.0 dtex), and the total fineness. It is preferably in the range of 33 to 330 dtex.

  The fabric structure of the fabric (A) is not particularly limited, and examples thereof include a woven fabric having a known woven structure such as a plain structure, a twill structure, a satin structure, a knitted fabric having a known knitted structure such as warp knitting or circular knitting, and a nonwoven fabric. The Of these, a woven fabric is particularly preferable in obtaining the above-mentioned air permeability.

Next, in the sound absorbing and insulating multilayer fabric of the present invention, the non-woven fabric (B) is a layer mainly contributing to the sound absorbing characteristics. The basis weight of the nonwoven fabric (B) needs to be 50 to 200 g / m ² . If the basis weight of the nonwoven fabric (B) is less than 50 g / m ² , a sufficient sound absorbing effect cannot be obtained, which is not preferable. On the contrary, if the basis weight is larger than 200 g / m ² , the lightness is impaired, which is not preferable.

  Moreover, it is necessary that the average single yarn fineness of the fibers constituting the nonwoven fabric (B) is 0.6 to 3.3 dtex (more preferably 0.6 to 2.0 dtex). When the average single yarn fineness is larger than 3.3 dtex, it is not preferable because sufficient sound absorption is not obtained. The smaller the average single yarn fineness, the better the sound absorption. However, when the average single yarn fineness is less than 0.6 dtex, it is not only difficult to produce the nonwoven fabric but also the handling property may be lowered. Absent.

  The average fineness is the single yarn fineness if the number of fibers constituting the nonwoven fabric is one, and the weighted average of the single yarn fineness if there are many types of fibers constituting the nonwoven fabric.

  It does not specifically limit as a fiber which comprises the said nonwoven fabric (B), The thing similar to a fabric (A) may be sufficient. That is, known fibers such as polyester fibers, polyamide fibers, acrylic fibers, polypropylene fibers, aromatic polyamide fibers, flame resistant fibers are used. Of these, the polyester fibers are preferably exemplified from the balance of handling workability, recyclability, performance, and price. In particular, it is more preferable that the nonwoven fabric (B) and the fabric (A) are both composed of the polyester-based fibers.

  The fiber form of the fibers constituting the nonwoven fabric (B) is not particularly limited, and may be long fibers (multifilament yarns) or short fibers. The fiber length of such short fibers is preferably about 20 to 90 mm, and more preferably crimped.

  In this case, the crimping method is as follows: 1) Using a composite fiber in which polymers having different heat shrinkage rates are bonded to the side-by-side type, the crimp is applied in a spiral shape. 2) The spiral crimp is applied by anisotropic cooling. 3) Various methods such as providing a zigzag crimp by the indentation crimp method can be used.

  The method for producing the non-woven fabric is not particularly limited, and the non-woven fabric is formed by intertwining the fibers after the spunbond method or melt-blowing method for directly producing the non-woven fabric from the long fibers, or after the short fibers are uniformly dispersed. A known method such as a needle punch method or a water needle method can be used.

  The sound absorbing and insulating multilayer fabric of the present invention has a two-layer structure in which at least the fabric (A) and the nonwoven fabric (B) are laminated and integrated. Here, as long as the purpose of the present invention is not impaired, another layer made of a woven or knitted fabric or a nonwoven fabric is laminated between the fabric (A) and the nonwoven fabric (B) and / or on the surface side. Also good.

  The adhesion method of the fabric (A) and the nonwoven fabric (B) is not particularly limited, and a known method can be used. For example, a method of laminating a fabric (A) and a nonwoven fabric (B) via a thermal adhesive sheet and then thermally bonding the fabric (A) and the nonwoven fabric (B) are entangled with each other using a needle punch machine. Method, a method of including a heat-adhesive composite short fiber in the nonwoven fabric (B) and thermally bonding the heat-adhesive composite short fiber and the fabric (A), a liquid binder comprising the fabric (A) and the nonwoven fabric (B) And a method of bonding with a powder binder. Of these, a method using a thermal adhesive sheet is preferable from the viewpoint of handleability.

In the sound-absorbing and insulating multilayer fabric thus obtained, the basis weight of the entire multilayer fabric is preferably 300 to 600 g / m ² from the viewpoint of obtaining sound-absorbing and insulating properties without impairing lightness. The thickness of the sound absorbing and insulating multilayer fabric is preferably 2 to 10 mm. If the thickness is less than 2 mm, a sufficient sound absorbing and insulating effect may not be obtained. On the other hand, when the thickness is larger than 10 mm, the handleability may be lowered when used for interior use or architectural use.

  When using the sound absorbing and insulating multilayer fabric of the present invention as an acoustic absorbing and insulating product, it is preferable to dispose the nonwoven fabric (B) on the sound source side. When the non-woven fabric (B) is arranged on the sound source side, the sound wave emitted from the sound source is absorbed by the non-woven fabric (B) and is then sound-insulated by the fabric (A).

  The sound absorbing and insulating multilayer fabric of the present invention may be added with known functional processing such as dyeing, raising, water repellent, flameproof, flame retardant, and negative ion generation.

Next, although the Example and comparative example of this invention are explained in full detail, this invention is not limited by these. In addition, each measurement item in an Example was measured with the following method.
<Thickness> Thickness (mm) was measured according to JISL1096. The average value was calculated with n = 5.
<Weight per unit area> The basis weight (g / m ² ) was measured according to JISL1096. The average value was calculated with n = 5.
<Air permeability> Air permeability was measured by JIS L 1096-1998, 6.27.1, method A (Fragile type air permeability tester method). The average value was calculated with n = 5.
<Sound absorption> Based on JISA1405, the normal incident sound absorption coefficient of the building material by the pipe method was measured by 1/3 octave center frequencies of 1000 Hz and 2000 Hz. The average value was calculated with n = 5.
<Sound Insulation> Based on JIS A1416, sound transmission loss in the laboratory was measured at 1/3 octave center frequencies of 1000 Hz and 2000 Hz. The average value was calculated with n = 5.

[Example 1]
Ordinary polyethylene terephthalate multifilament yarn (total fineness 330 dtex / 96 fil) is arranged on the warp yarn, normal polyethylene terephthalate multifilament yarn (total fineness 84 dtex / 72 fil) is arranged on the weft yarn, and the warp density is 370 yarns / 2.54 cm. A plain-textured fabric having a weft density of 70 / 2.54 cm, a basis weight of 252 g / m ² , a thickness of 0.8 mm, and an air permeability of 8.1 cc / cm ² / sec was obtained as Fabric (A).

On the other hand, after obtaining a uniform web with a normal roller card using a short fiber made of polyethylene terephthalate (single yarn fineness 1.7 dtex, fiber length 51 mm, number of crimps: 12 / 2.54 cm), a normal needle Fibers were entangled with each other with a punching machine to obtain a uniform nonwoven fabric (B) (weight per unit area 150 g / m ² , thickness 2.2 mm).

Next, the fabric (A) and the nonwoven fabric (B) are laminated via a heat bonding sheet (manufactured by Nittobo, span fab, basis weight 30 g / m ² , thickness 0.8 mm), and again heat-treated (180 ° C., 5 minutes) ) To obtain a sound-absorbing and sound-insulating multilayer fabric (weighing 432 g / m ² , thickness 3.2 mm). With respect to the sound absorbing and insulating multilayer fabric, the nonwoven fabric (B) was placed on the sound source side and the sound absorbing property was measured. As a result, the sound absorbing property was excellent at 0.71 at 1000 Hz and 0.95 at 2000 Hz. Moreover, when the sound insulation was measured, it was 8.1 dB at 1000 Hz and 9.7 dB at 2000 Hz.

[Comparative Example 1]
In Example 1, ordinary polyethylene terephthalate multifilament yarn (total fineness 330 dtex / 96 fil) is arranged on the warp, ordinary polyethylene terephthalate multifilament yarn (total fineness 84 dtex / 72 fil) is arranged on the weft, and warp density 370 A plain-textured fabric having a fabric / 2.54 cm, a weft density of 48 / 2.54 cm, a basis weight of 245 g / m ² , a thickness of 0.8 mm, and an air permeability of 20.1 cc / cm ² / sec was obtained as fabric (A). . Except this, it carried out similarly to Example 1, and obtained the sound-absorption sound insulation multilayer fabric (weighing 425g / m < ² >, thickness 3.2mm). The sound absorbing and insulating multilayer fabric was measured for sound absorption by placing the nonwoven fabric (B) on the sound source side. The sound absorption was 0.68 at 1000 Hz and 0.91 at 2000 Hz. However, when the sound insulation was measured, it was insufficient in terms of sound insulation, 5.1 dB at 1000 Hz and 7.1 dB at 2000 Hz.

  According to the present invention, a sound-absorbing and sound-insulating multilayer fabric having good sound-absorbing characteristics and excellent sound-insulating characteristics (transmission loss) can be obtained without impairing lightness. Such a sound-absorbing and insulating multilayer fabric is suitable for applications such as vehicles, houses, and highways, and provides an excellent soundproofing effect.

Claims (6)

Basis weight is and air permeability is 150 to 350 g / ^{m 2} and 10cc ^/ cm 2 ^/ sec or less of the fabric (A), having a basis weight average monofilament fineness of it and the constituent fibers are 50 to 200 g / ^{m 2} 0.6 A sound-absorbing / insulating multilayer fabric, wherein the nonwoven fabric (B) of ~ 3.3 dtex is laminated and integrated. The sound-absorbing and insulating multilayer fabric according to claim 1, wherein the weight of the entire multilayer fabric is 300 to 600 g / m ² .   The sound absorbing and insulating multilayer fabric according to claim 1 or 2, wherein the entire multilayer fabric has a thickness of 2 to 10 mm.   The sound-absorbing and sound-insulating multilayer fabric according to any one of claims 1 to 3, wherein the fabric (A) is composed of polyester fibers.   The sound-absorbing and sound-insulating multilayer fabric according to any one of claims 1 to 4, wherein the nonwoven fabric (B) is composed of a polyester fiber.   A sound-absorbing and sound-insulating product comprising the sound-absorbing and sound-insulating multilayer fabric according to any one of claims 1 to 5, wherein the nonwoven fabric (B) is disposed on the sound source side.