JP2007086505A - Sound absorbing and insulating material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound absorbing and insulating material with sound absorbing and sound insulating properties which is lightweight, superior in operability, and suitable as an automobile interior or exterior material etc. <P>SOLUTION: Disclosed is the sound absorbing and insulating material formed by stacking a viscoelastic sheet of ≤3 mm in thickness and ≤270 mm in cantilever flexibility of JIS L 1096 which is substantially not air-permeable and a sound absorbing material made of nonwoven fabric obtained sticking wet nonwoven fabric or long-fiber nonwoven fabric of 30 to 100 g/m<SP>2</SP>in basis weight, 30 to 300 μm in thickness, and 10 to 50 cc/cm<SP>2</SP>/sec in air permeability on at least one surface of nonwoven fabric of 200 to 1,000 g/m<SP>2</SP>in basis weight and 5 to 30 mm in thickness. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sound absorbing and insulating material having sound absorbing properties and sound insulating properties.

  Conventionally, sound absorbing materials have been used for electrical products, building wall materials, vehicles, and the like. In particular, in order to prevent external acceleration noise from automobiles, idle vehicle exterior noise, exhaust noise, etc., specifications are set to cover the engine room and muffler outside the vehicle, the ceiling material and flooring material in the vehicle with a sound-absorbing shielding cover It is being done.

  In addition, when used as a soundproof material for vehicles such as automobiles, in addition to sound absorption and sound insulation, it is a lightweight material for reducing the weight of the vehicle body, is flame retardant, has VOC countermeasures, and What is excellent in the recyclability at the time of disposal of a motor vehicle has been requested | required.

Therefore, a nonwoven fabric has been attracting attention as a material that satisfies the above requirements. For example, in Patent Documents 1 and 2, a polyester fiber, a polypropylene fiber, or a mixture fiber of these materials is 95% by weight and 5% by weight of a rayon fiber are subjected to needle punching on a mixed web, and a vinyl chloride emulsion is attached to the nonwoven fabric mat for drying treatment. The interior material for automobiles is described in which a flame retardant resin coating is formed and the resin coating surface and a glass fiber mat are integrally laminated.
JP 62-43336 A JP 62-43337 A

  However, although the techniques described in Patent Documents 1 and 2 have good flame retardancy, it is difficult to recycle the interior material because the glass fiber mat is integrated, and the interior material is incinerated. Has a problem that dioxins may be generated.

  In particular, in vehicles such as automobiles, there is a strong demand for a sound absorbing / insulating material having not only sound absorbing properties but also sound insulating properties.

  The present invention has been made in view of the above problems, and is to provide a sound absorbing and insulating material having sound absorbing properties and sound insulating properties that is lightweight, excellent in workability and recyclability, and suitable as an automobile interior and exterior material. Objective.

  As a result of intensive studies to achieve the above object, the present inventors have laminated a sound absorbing material made of a non-woven fabric and a substantially non-breathable sheet so that the sound absorbing and insulating material has excellent sound absorbing properties and sound insulating properties. And the present invention has been achieved.

That is, the present invention is as follows.
1) a sound absorbing and insulating material characterized in that a sheet having a thickness of 3 mm or less and a cantilever flexibility in JIS L 1096 of 270 mm or less and having substantially no air permeability and a sound absorbing material made of nonwoven fabric are laminated;
2) sound absorbing material, basis weight 200 to 1000 g / ^{m 2,} on at least one surface of the nonwoven fabric having a thickness of 5 to 30 mm, basis weight 30 to 100 g / ^{m 2,} a thickness of 30 to 300 [mu] m, air permeability of 10~50cc ^/ cm 2 ^/ sec The sound-absorbing and insulating material according to 1), which is a sound-absorbing material obtained by laminating a wet nonwoven fabric or a long-fiber nonwoven fabric,
3) The sound absorbing and insulating material according to 1) or 2), wherein two or more layers of the sheet are used.
4) The sound absorbing and insulating material according to any one of 1) to 3), wherein the sheet is made of a thermoplastic elastomer composition whose main component is a dynamically crosslinked thermoplastic elastomer.
5) Dynamically crosslinked thermoplastic elastomer comprises 10-50% by weight polyalkylene phthalate polyester (co) polymer and 50-90% by weight dynamically crosslinked poly (meth) acrylate or polyethylene / (meta The sound-absorbing and insulating material according to 4), comprising an acrylate crosslinked rubber,
6) The sound absorbing and insulating material according to 5) above, wherein the dynamically crosslinked poly (meth) acrylate or polyethylene / (meth) acrylate crosslinked rubber is a polyacrylate elastomer and / or a polyethylene acrylate elastomer,
7) The sound absorbing and insulating material according to any one of 1) to 3) above, wherein the sheet is made of a synthetic resin film having a thickness of 30 μm or less formed by metal sputtering or metal deposition, and
8) The sound absorbing and insulating material according to any one of 1) to 7), wherein the sound absorbing and insulating material is laminated on at least one planar body part.

  According to the present invention, it is possible to provide a sound absorbing and insulating material that is lightweight and has excellent sound absorbing properties and sound insulating properties. The sound absorbing and insulating material of the present invention is resistant to repeated thermal processing, has a heat resistance of about 150 to 200 ° C., and exhibits stable sound absorbing and insulating performance without thermal deterioration. In addition, it is also excellent in processability and recyclability.

  The sheet used in the sound absorbing and insulating material of the present invention has a thickness of 3 mm or less, a cantilever flexibility in JIS L 1096 of 270 mm or less, and substantially no air permeability. If the thickness exceeds 3 mm, the lightness is inferior, which is not preferable. Moreover, since it has a softness | flexibility, it is excellent also in workability | operativity (workability and workability). Moreover, since there is substantially no air permeability, sound insulation is exhibited when laminated with a sound absorbing material.

  The sheet | seat used by this invention should just have the said characteristic, and is not specifically limited. As a sheet, for example, a sheet made of a thermoplastic elastomer composition mainly composed of a dynamically crosslinked thermoplastic elastomer is a preferred example. As the dynamically crosslinked thermoplastic elastomer, 10 to 50% by mass of polyalkylene phthalate polyester (co) polymer and 50 to 90% by mass of dynamically crosslinked poly (meth) acrylate or polyethylene / (meth) What consists of acrylate crosslinked rubber is preferable. Examples of the dynamically crosslinked poly (meth) acrylate or polyethylene / (meth) acrylate crosslinked rubber include polyacrylate elastomer and / or polyethylene acrylate elastomer.

  Moreover, as a sheet | seat, the sheet | seat which consists of what carried out metal sputtering or metal vapor deposition to the synthetic resin film of thickness 30 micrometers or less is also a preferable example. Examples of the synthetic resin film include polyester films such as polyethylene terephthalate. Examples of the metal include aluminum.

  In the sound absorbing and insulating material according to the present invention, the sheet can be laminated in one layer or two or more layers, and the arrangement position of the sheet is arbitrary. A sound absorbing material may be laminated on a planar vehicle body part such as an iron plate, or a sheet may be laminated on the planar vehicle body part, and a sound absorbing material may be laminated thereon.

The sound absorbing material used in the present invention is made of a nonwoven fabric, and has a basis weight of 30 to 100 g / m on at least one surface of a nonwoven fabric having a basis weight of 200 to 1000 g / m ² and a thickness of 5 to 30 mm (hereinafter referred to as “nonwoven fabric (N)”). ^2. What stuck the wet nonwoven fabric or long-fiber nonwoven fabric (henceforth "nonwoven fabric (H)") of 30-300 micrometers in thickness and 10-50 cc / cm < ² > / sec of ventilation | gas_flowing rates is preferable.

The nonwoven fabric (N) may be either a nonwoven fabric composed of short fibers or a nonwoven fabric composed of long fibers as long as the basis weight is 200 to 1000 g / m ² and the thickness is 5 to 30 mm. For example, a needle punched nonwoven fabric, a water jet punched nonwoven fabric, a melt blown nonwoven fabric, a spunbonded nonwoven fabric, a stitchbonded nonwoven fabric, or the like is used. Among these, a needle punch nonwoven fabric or a water jet punch nonwoven fabric is preferable, and a needle punch nonwoven fabric is particularly preferable. Miscellaneous felts can also be used as the nonwoven fabric.

  If the basis weight of the nonwoven fabric is too small, handling at the time of manufacture becomes worse, and for example, the shape retention of the web layer becomes poor. If the basis weight is too large, the energy required for the entanglement of the fibers becomes large, or the entanglement becomes insufficient, resulting in inconveniences such as deformation during processing of the nonwoven fabric. As the thickness of the non-woven fabric increases, the sound absorbing property is improved. However, a material having a thickness of 5 to 30 mm is used from the viewpoints of economy, ease of handling, and space securing as a sound absorbing material.

The nonwoven fabric (H) may be a wet nonwoven fabric or a long fiber nonwoven fabric having a basis weight of 30 to 100 g / m ² , a thickness of 30 to 300 μm, and an air permeability of 10 to 50 cc / cm ² / sec. If the basis weight of the nonwoven fabric is too small, handling at the time of processing deteriorates, and for example, the form retainability of the web layer becomes poor. If the basis weight is too large, the weight is inferior. The thickness of the nonwoven fabric is in the above range from the viewpoints of economy, ease of handling, ensuring performance as a sound absorbing material, and the like. Aeration rate is preferably 10~50cc ^/ cm 2 ^/ sec. The ventilation rate here is measured in accordance with JIS L-1096 A. If the air flow rate is too large or too small, the sound absorbing property of the sound absorbing material is deteriorated.

  The wet nonwoven fabric (H) may be produced from the above heat-resistant fiber and silicate mineral by a known wet papermaking method. As the silicate mineral, mica is preferably exemplified, and more specifically, for example, muscovite, phlogopite, biotite, artificial phlogopite, and the like. The usage-amount of the said silicate mineral with respect to a skin material is 5-70 mass%, Preferably it is 10-40 mass%.

  In the present invention, the fibers constituting the nonwoven fabric may be natural fibers or synthetic fibers, but synthetic fibers are preferably used from the viewpoint of durability. The cross-sectional shape of the fibers constituting the nonwoven fabric is not particularly limited, and may be a perfect circular cross-sectional shape or an irregular cross-sectional shape. For example, elliptical shape, hollow shape, X sectional shape, Y sectional shape, T sectional shape, L sectional shape, star sectional shape, leaf shaped sectional shape (for example, three leaf shape, four leaf shape, five leaf shape, etc.), other polygonal sectional shape (For example, a triangular shape, a square shape, a pentagonal shape, a hexagonal shape, etc.) may be used.

  As the fibers constituting the nonwoven fabric, (1) thermoplastic fibers such as polyester fibers, polyamide fibers (for example, nylon fibers), acrylic fibers, polyolefin fibers (for example, polypropylene fibers, polyethylene fibers), or (2) heat resistance Examples of the fiber material include those produced by a known method such as wet spinning, dry spinning or melt spinning.

  (1) Among thermoplastic fibers, polyester fibers, polypropylene fibers, and nylon fibers are preferable because they are excellent in durability and wear resistance. In particular, polyester fibers are most preferable because the raw material polyester can be easily recycled by heat melting of the used nonwoven fabric, is excellent in economic efficiency, has a good texture of the nonwoven fabric, and is excellent in moldability. Some or all of these thermoplastic fibers may be bristles (collected recycled fibers). In particular, recycled fibers that have been collected and recycled once used in the vehicle can be suitably used.

  The polyester fiber is not particularly limited as long as it is a fiber made of a polyester resin. Examples of the polyester fiber include polyethylene terephthalate (PET) fiber, polybutylene terephthalate (PBT) fiber, polyethylene phthalate (PEN) fiber, polycyclohexylene dimethylene terephthalate (PCT) fiber, polytrimethylene terephthalate (PTT) fiber, poly Examples include trimethylene naphthalate (PTN) fiber, and among them, polyethylene terephthalate (PET) fiber is preferable. In addition, polycaprolactone, polyethylene succinate, polybutylene succinate, polyethylene adipate, polybutylene dipate, polyethylene succinate-adipate copolymer, polylactic acid, or other dicarboxylic acids and / or glycols based on these were copolymerized It may be a biodegradable polyester fiber such as a polyester fiber.

  (2) The heat resistant fiber preferably has a LOI value (limit oxygen index) of 25 or more. The LOI value means the minimum oxygen concentration necessary for continuous burning for 5 cm or more, and is a value measured by the JIS L 1091 method. This is because if the heat resistant fiber has a LOI value of 25 or more, flame retardancy can be imparted to the nonwoven fabric, and in order to obtain a nonwoven fabric with more excellent flame retardancy, fibers having a LOI value of 28 or more are preferred.

  Examples of heat resistant fibers include aramid fibers, polyphenylene sulfide fibers, polybenzoxazole fibers, polybenzthiazole fibers, polybenzimidazole fibers, polyether ether ketone fibers, polyarylate fibers, polyimide fibers, fluorine fibers, and flameproof fibers. One kind or two or more kinds of fibers selected may be mentioned. As these heat-resistant fibers, any conventionally known fibers, those manufactured according to a known method or a method analogous thereto can be used. Here, the flame-resistant fiber is mainly produced by baking acrylic fiber at 200 to 500 ° C. in an active atmosphere such as air, and is a precursor of carbon fiber. For example, the product name “Lastan” (registered trademark) manufactured by Asahi Kasei Corporation, the product name “Pyromex” (registered trademark) manufactured by Toho Tenax Co., Ltd., and the like can be mentioned.

  Among the above heat-resistant fibers, aramid fibers, polyphenylene sulfide fibers, polybenzoxazole fibers, polyether ether ketone fibers, polyarylate fibers and flame-resistant fibers are preferable from the viewpoint of low shrinkage and processability, and in particular, aramid fibers. preferable.

  Aramid fibers include para-aramid fibers and meta-aramid fibers. Examples of para-aramid fibers include polyparaphenylene terephthalamide fibers (manufactured by DuPont, Inc., Toray DuPont, trade name “KEVLAR”). ”(Registered trademark)), copolyparaphenylene-3,4′-oxydiphenylene terephthalamide fiber (manufactured by Teijin Ltd., trade name“ Technola ”(registered trademark)) and the like. Metaphenylene isophthalamide fiber (trade name “NOMEX (registered trademark)” manufactured by DuPont, USA, trade name “Conex (registered trademark)” manufactured by Teijin Limited), and the like. Among these aramid fibers, para-aramid fibers are preferable from the viewpoint of excellent heat resistance.

  The fiber length and fineness of the thermoplastic fiber and the heat-resistant fiber are not particularly limited and can be appropriately determined depending on the compatibility with other synthetic fibers and the use, but the fiber length is preferably 10 mm or more. Long fibers or short fibers may be used, but in the case of short fibers, the fiber length is preferably 10 to 100 mm, particularly preferably 20 to 80 mm. By using short fibers having a fiber length of 10 mm or more, the tangled short fibers are less likely to fall off the nonwoven fabric. On the other hand, the longer the fiber length, the better the sound absorption, but it is preferably 100 mm or less because the spinning property from the card and the flame retardancy tend to be inferior. The fineness is 0.1 to 50 dtex, preferably 0.5 to 30 dtex, more preferably 0.3 to 30 dtex, and particularly 1.0 to 10 dtex is preferably used.

  The thermoplastic fiber and the heat-resistant fiber can be used alone or in combination of two or more. It is also possible to mix and use fibers of the same kind or different kinds and different in fineness and fiber length. In this case, the mixing ratio of the fibers is arbitrary, and can be appropriately determined according to the use and purpose of the nonwoven fabric.

  Moreover, the nonwoven fabric which entangled said thermoplastic short fiber and heat-resistant short fiber can also be used. When the thermoplastic short fiber and the heat-resistant short fiber are used in combination, the thermoplastic short fiber and the heat-resistant short fiber are preferably mixed in a mass ratio of 95: 5 to 55:45. When the mixing ratio of the thermoplastic short fibers exceeds 95% by mass, the flame retardancy of the nonwoven fabric becomes insufficient, and liquid dripping (drip) is likely to occur. On the other hand, when the said ratio is less than 55 mass%, although flame retardance is favorable, the workability at the time of processing a nonwoven fabric into a desired size becomes inferior, and it is also inferior to economical efficiency. From the viewpoint of flame retardancy and processability, the mass ratio of thermoplastic short fibers to heat-resistant short fibers is more preferably 88:12 to 55:45, still more preferably 85:15 to 55:45, and most preferably. 85:15 to 65:35.

  Further, in order to improve the wear resistance and sound absorption characteristics of the nonwoven fabric, it is also possible to include a fine denier thermoplastic short fiber in the thermoplastic short fiber. As the kind of the fine denier thermoplastic short fiber, one kind or two or more kinds of fibers selected from the above-mentioned polyester fiber, polypropylene fiber, polyethylene fiber, linear low density polyethylene fiber, ethylene-vinyl acetate copolymer fiber, and the like may be used. Can be mentioned. The fine denier thermoplastic short fibers usually have a fineness of 0.1 to 15 dtex, preferably 0.5 to 6.6 detex, particularly 1.1 to 3.3 dtex. If the fineness is too thin, the processability is deteriorated, and if it is too thick, the sound absorption characteristics are deteriorated.

  The non-woven fabric (N) and the non-woven fabric (H) constituting the sound absorbing material may be the same fiber material or different materials. However, considering recyclability, it is preferable that the nonwoven fabric (N) and the nonwoven fabric (H) are the same material.

  The sound-absorbing material and sheet, or the non-woven fabric (N) and non-woven fabric (H) may be laminated in a non-adhered state, but it is preferred that they are laminated by a usual bonding method. In addition to fusion, stitching, needle punching, adhesive bonding, heat embossing, ultrasonic bonding, sinter bonding with adhesive resin, bonding with welder, etc., low melting point net, low melting point film, low melting point It is also possible to employ a method in which a low melting point material such as fiber is interposed between the skin material and the nonwoven fabric, and the low melting point material is melted and bonded by heat treatment. Here, the melting point of the low melting point material is preferably 20 ° C. or more lower than other fibers used in the nonwoven fabric and the skin material.

  Also, as a joining method, after passing the sound absorbing material through the metal fitting with a base, another metal plate with a hole is passed through the tip, and the tip of the metal joint with the base is bent to join the sheet. Can be adopted. Moreover, the method of attaching a fixing member using a binding machine can also be employed, and examples thereof include Bannock Pin (registered trademark) (manufactured by Bannock Japan).

  In addition, the sound absorbing and insulating material of the present invention can be used for various purposes by applying a known method or the like according to the purpose and application, and processing into an appropriate size, shape, etc. Can take various shapes. For example, a polyhedron (such as a hexahedron such as a rectangular parallelepiped), a cylindrical body, a cylindrical body, and the like can be given. When the sound absorbing and insulating material is used as a vehicle interior / exterior material, it is used by being laminated on at least one planar body part.

  The sound-absorbing and insulating material of the present invention can be used for all applications where sound-absorbing and sound-insulating properties are required. For example, sound-absorbing and sound-insulating internal combustion engines such as automobiles, trains, freight cars, ships, and aircraft; , Electric washing machine, electric refrigerator, freezer, electric clothes dryer, electric mixer / juicer, air conditioner (air conditioner), hair dryer, electric shaver, air cleaner, electric dehumidifier, electric lawn mower etc. It can be used for various applications such as sound insulation; silencing and sound insulation of lighting devices; wall materials for construction; around various pipes; breakers (lining of casings, etc.).

  In particular, around an engine having a heat source (up to 180 ° C.) and a sound source, a partition wall with a dashboard in the engine room, a ceiling material and a floor material in a vehicle interior, and around an exhaust duct having a heat source (300 to 350 ° C.) and a sound source. By using it as a sound absorbing and insulating material, noise can be greatly reduced.

  Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to only the following Examples. In addition, the measuring method of each characteristic value in the following examples and comparative examples is as follows.

<Thickness> Dial gauge

<Flexibility> Measurement was performed using a cantilever method in accordance with JIS L 1096, a general fabric test method, with a sample width of 50 mm and a sample length of 400 mm.

<Weight per unit> According to JIS L 1097.

<Air flow rate> Conforms to JIS L 1096 A.

<Sound absorption characteristics> According to JIS A 1409, it was measured at a sample size of 5 m ² in a test room (volume 38.9 m ³ , surface area 68.3 m ² , floor area 12.1 m ² ) of Fukui Industrial Technology Center, and 1/3 The sound absorption coefficient (%) at 500, 1000, 2000, and 3000 Hz of the octave center frequency is shown.

<Sound insulation characteristic> According to JIS A 1416, it measured by the 1/3 octave center frequency in the test room of Fukui Industrial Technology Center, and showed it by the transmission loss (dB) at 2000, 4000, and 6000 Hz.

[Example 1]
A paper made of DuPont-ETPV90A01HS sheet made of DuPont USA made of a thermoplastic elastomer dynamically crosslinked with a thickness of 1 mm and flexibility of 120 mm, and a paper made of polyethylene terephthalate cut yarn (thickness 80 μm, basis weight 44 g / m ² , air flow rate) 17.6 cc / cm ² / sec) was laminated with a sound absorbing material bonded to a 100% polyethylene terephthalate non-woven fabric having a thickness of 10 mm and a basis weight of 500 g / m ^{2 with} a low melting point polymer to produce a sound absorbing and insulating material. Sound insulation and sound absorption were measured in the stacked state.

As for sound insulation, an ETPV90A01HS sheet is installed on the sound source side, an iron plate with a thickness of 0.8 mm and a basis weight of 6.1 Kg / m ² is installed on the sound source side, assuming that it is used in vehicles. The three-layer structure was measured.

  The sound absorbing property was measured in a state where a sound absorbing material made of polyethylene terephthalate paper and a polyethylene terephthalate nonwoven fabric was laid on the floor, and an ETPV90A01HS sheet was in close contact with the sound absorbing material.

[Example 2]
The sound absorbing material obtained by bonding the polyethylene terephthalate paper used in Example 1 to the polyethylene terephthalate nonwoven fabric is installed on the sound source side, the ETPV90A01HS sheet used in Example 1 is used as an intermediate layer, and the iron plate used in Example 1 is an anechoic chamber. The sound insulation was measured with a three-layer structure superimposed on the side. Sound absorptivity was measured in a state in which an ETPV90A01HS sheet was laid on the floor surface and a sound absorbing material in which polyethylene terephthalate paper was bonded to a polyethylene terephthalate nonwoven fabric was adhered thereto.

[Example 3]
The steel plate used in Example 1, a sound absorbing material obtained by bonding polyethylene terephthalate paper to a polyethylene terephthalate nonwoven fabric, ETPV90A01HS sheet, sound insulation is an iron plate on the sound source side, a sheet on the intermediate layer, and a polyethylene terephthalate paper on the anechoic chamber side The sound-absorbing material bonded to the polyethylene terephthalate nonwoven fabric was stacked and measured in a three-layer structure.

[Example 4]
Aramid paper (weight per unit: 31 g / m ² , thickness: 45 μm, air flow rate: 16 cc / cm ² / sec) and Kevlar (registered trademark) 100% non-woven fabric (fiber length: 51 mm, thickness: 10 mm, weight per unit: 483 g) / M ² , needle punch method) with low-melting particles, and aluminium is vapor-deposited on a 12.5 μm-thick polyimide film on aramid paper, and the basis weight is 18.1 g / m ² . A vapor-deposited film with 3.5cm flexibility and a low-melting point resin is pasted together with a ventilation rate of 0, and the sound insulation is measured in a four-layer structure by installing polyimide film, aramid paper, aramid nonwoven fabric, ETPV90A01HS sheet, and iron plate in this order from the sound source side. did. Sound absorptivity was measured in a state where an ETPV sheet was laid on the floor, a sound absorbing material obtained by adhering an aramid nonwoven fabric and an aramid paper thereon, and a polyimide film adhered thereon.

[Comparative Example 1]
The sound insulation property of only the iron plate used in Example 1 was measured.

[Comparative Example 2]
The sound insulation was measured in a state where the sound absorbing material was installed on the sound source side with a two-layer structure of a sound absorbing material obtained by bonding the polyethylene terephthalate paper used in Example 1 to a polyethylene terephthalate nonwoven fabric and an iron plate. The sound absorbing property was measured by placing only a sound absorbing material obtained by bonding polyethylene terephthalate paper to a polyethylene terephthalate nonwoven fabric so that the polyethylene terephthalate nonwoven fabric becomes a floor surface.

[Comparative Example 3]
Sound insulation was measured in a state where a sound absorbing material in which the polyethylene terephthalate paper used in Example 1 was bonded to a polyethylene terephthalate nonwoven fabric was installed. The sound absorbing property was measured by placing only a sound absorbing material obtained by bonding polyethylene terephthalate paper to a polyethylene terephthalate nonwoven fabric so that the polyethylene terephthalate nonwoven fabric becomes a floor surface.

[Comparative Example 4]
The sound insulation of only the ETPV90A01HS sheet used in Example 1 was measured.

  The above evaluation results are summarized in Table 1. FIG. 1 shows transmission loss data of Example 1 and Comparative Example 1. From the results in Table 1, it can be seen that the sound absorbing and insulating material according to the present invention is excellent in sound absorbing properties and sound insulating properties.

Transmission loss data of sound absorbing and insulating material according to the present invention

Claims (8)

A sound absorbing and insulating material characterized in that a sheet having a thickness of 3 mm or less and a cantilever flexibility in JIS L 1096 of 270 mm or less and having substantially no air permeability is laminated with a sound absorbing material made of a nonwoven fabric. Sound absorbing material, basis weight 200 to 1000 g / ^{m 2,} on at least one surface of the nonwoven fabric having a thickness of 5 to 30 mm, basis weight 30 to 100 g / ^{m 2,} a thickness of 30 to 300 [mu] m, wet aeration 10~50cc ^/ cm 2 ^/ sec The sound-absorbing and insulating material according to claim 1, wherein the sound-absorbing and insulating material is a sound-absorbing material bonded with a nonwoven fabric or a long-fiber nonwoven fabric. The sound absorbing and insulating material according to claim 1 or 2, wherein two or more layers of the sheet are used. The sound absorbing and insulating material according to any one of claims 1 to 3, wherein the sheet is made of a thermoplastic elastomer composition whose main component is a dynamically crosslinked thermoplastic elastomer. Dynamically cross-linked thermoplastic elastomer comprises 10-50% by weight polyalkylene phthalate polyester (co) polymer and 50-90% by weight dynamically cross-linked poly (meth) acrylate or polyethylene / (meth) acrylate The sound absorbing and insulating material according to claim 4, comprising a crosslinked rubber. 6. The sound absorbing and insulating material according to claim 5, wherein the dynamically crosslinked poly (meth) acrylate or polyethylene / (meth) acrylate crosslinked rubber is a polyacrylate elastomer and / or a polyethylene acrylate elastomer. The sound-absorbing and insulating material according to any one of claims 1 to 3, wherein the sheet is made of a synthetic resin film having a thickness of 30 µm or less formed by metal sputtering or metal vapor deposition. The sound absorbing and insulating material according to any one of claims 1 to 7, wherein the sound absorbing and insulating material is laminated on at least one planar body part.

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