WO2020213685A1 - Sound absorbing material - Google Patents

Sound absorbing material Download PDF

Info

Publication number
WO2020213685A1
WO2020213685A1 PCT/JP2020/016745 JP2020016745W WO2020213685A1 WO 2020213685 A1 WO2020213685 A1 WO 2020213685A1 JP 2020016745 W JP2020016745 W JP 2020016745W WO 2020213685 A1 WO2020213685 A1 WO 2020213685A1
Authority
WO
WIPO (PCT)
Prior art keywords
sound absorbing
base material
layer
absorbing material
resin
Prior art date
Application number
PCT/JP2020/016745
Other languages
French (fr)
Japanese (ja)
Inventor
慧 高安
亜唯 横倉
智彦 小竹
Original Assignee
日立化成株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日立化成株式会社 filed Critical 日立化成株式会社
Priority to JP2021514220A priority Critical patent/JPWO2020213685A1/ja
Publication of WO2020213685A1 publication Critical patent/WO2020213685A1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/86—Sound-absorbing elements slab-shaped
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches

Definitions

  • the present invention relates to a sound absorbing material.
  • a single-layer sound-absorbing structure made of melt-blown non-woven fabric is known (for example, Patent Document 1).
  • the sound absorbing characteristics are insufficient, especially in the low frequency region.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sound absorbing material having excellent sound absorbing characteristics in a low frequency region.
  • the present invention provides a sound absorbing material including a first base material layer having communication holes, an adhesive layer, and a second base material layer having communication holes in this order.
  • the first base material layer and the second base material layer may be a resin foam or a non-woven fabric.
  • the sound absorbing material may further include a resin film on the first base material layer.
  • the resin film may be composed of polyolefin, polyester or polyamide.
  • the sound absorbing material may further include a metal vapor deposition layer on at least one surface of the resin film.
  • the thickness of the sound absorbing material may be 1 to 100 mm.
  • the sound absorbing material may have a vertically incident sound absorption coefficient of 0.3 or more measured in accordance with JIS A 1405-1 at any frequency of 1 kHz or less.
  • FIG. 1 is a schematic cross-sectional view of the sound absorbing material.
  • the sound absorbing material 10 includes a first base material layer 1 having communication holes, an adhesive layer 2, and a second base material layer 3 having communication holes in this order.
  • the sound (sound energy) incident from the first base material layer side is dissipated as heat energy when passing through the sound absorbing material. As a result, sound attenuation is observed.
  • Base layer examples of the base material layer having communication holes include a resin foam, a non-woven fabric, a polymer porous body, and a porous ceramic. Of these, the base material layer may be a resin foam or a non-woven fabric from the viewpoint of excellent sound absorption characteristics in the low frequency region.
  • the first base material layer and the second base material layer may be made of the same material or may be made of different materials.
  • the material of the resin foam examples include polyethylene resin, polypropylene resin, polyurethane resin, polyester resin, acrylic resin, polystyrene resin, melamine resin, silicone resin, natural rubber, synthetic rubber and the like. From the viewpoint of heat resistance, flame retardancy, etc., the material of the resin foam may be melamine resin.
  • Examples of the fibers constituting the non-woven fabric include organic fibers and inorganic fibers.
  • Examples of the organic fiber include polyolefin fibers such as polyethylene (low density or high density), polypropylene, copolymerized polyethylene, and copolymerized polypropylene, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and polybutylene naphthalate.
  • Such as polyester fiber, acrylic fiber, polyamide fiber, nylon fiber, rayon fiber, natural fiber such as wool and the like can be mentioned.
  • examples of the inorganic fiber include glass fiber, metal fiber, ceramic fiber, carbon fiber and the like.
  • the fibers constituting the non-woven fabric may contain one kind or two or more kinds of these.
  • the thickness of the base material layer can be 0.1 to 50 mm, 0.5 to 20 mm, or 2.0 to 20 mm from the viewpoint of excellent sound absorption characteristics in the low frequency region. It may be 2.0 to 10 mm.
  • the first base material layer and the second base material layer may have the same thickness or may have different thicknesses. From the viewpoint of excellent sound absorption characteristics in the low frequency region, the thickness of the first base material layer (base material layer on the incident side of sound) may be thinner than the thickness of the second base material layer.
  • the basis weight of the base material layer can be 10 to 1000 g / m 2 and may be 30 to 800 g / m 2 or 30 to 700 g / m 2 from the viewpoint of excellent sound absorption characteristics in the low frequency region. It may be 50 to 500 g / m 2 or 150 to 300 g / m 2 .
  • the first base material layer and the second base material layer may have the same basis weight or may have different basis weights.
  • the density of the base material layer can be 0.005 to 1.0 g / cm 3 or 0.010 to 0.50 g / cm 3 from the viewpoint of excellent sound absorption characteristics in the low frequency region. It may be 0.010 to 0.20 g / cm 3 , 0.020 to 0.20 g / cm 3 , or 0.020 to 0.15 g / cm 3 .
  • the first base material layer and the second base material layer may have the same density or may have different densities.
  • the adhesive layer includes polyester resin, vinyl acetate resin, ethylene / vinyl acetate copolymer resin, isobutene / maleic anhydride copolymer resin, acrylic copolymer resin, acrylic monomer, acrylic oligomer, vinyl chloride resin, and urethane resin (moisture curing).
  • silylated urethane resin epoxy resin, modified epoxy resin, polyolefin resin such as polyethylene resin, ionomer resin, silicone resin, modified silicone resin, styrene / butadiene rubber, chloroprene rubber, synthetic rubber such as nitrile rubber, isoprene rubber
  • the adhesive layer may be one having the layer containing the adhesive component or the laminate on both sides of the resin film (adhesive sheet). In this case, the above-mentioned resin film can be used as the resin film.
  • the adhesive layer may be provided between the resin film and the first base material.
  • Each adhesive layer may be composed of the same material or may be composed of different materials.
  • the thickness of the adhesive layer is not particularly limited, but when a layer containing the above-mentioned adhesive component or a layer made of a laminate is used as the adhesive layer, it can be 0.01 to 500 ⁇ m, and 0.1 to 300 ⁇ m. There may be. Each adhesive layer may have the same thickness or may have different thicknesses. When the adhesive sheet is used as the adhesive layer, the thickness of the adhesive layer can be 10 to 1000 ⁇ m, or 100 to 500 ⁇ m.
  • the sound absorbing material may further include a resin film on the first base material layer from the viewpoint of excellent sound absorbing characteristics in the low frequency region.
  • the resin constituting the resin film include polyolefins such as polyethylene (low density or high density), polypropylene, copolymerized polyethylene, and copolymerized polypropylene, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and poly.
  • polyesters such as butylene naphthalate and polyamides.
  • the thickness of the resin film can be 0.5 to 500 ⁇ m, 5 to 250 ⁇ m, or 10 to 100 ⁇ m from the viewpoint of excellent sound absorption characteristics in the low frequency region.
  • the first resin film and the second resin film may have the same thickness or may have different thicknesses.
  • the ratio of the thickness of the resin film to the thickness of the base material layer may be 1 to 20000. It can be 10 to 10000 or 100 to 1000.
  • the resin film may be provided with a metal vapor deposition layer on its surface from the viewpoint of improving the sound absorption effect by adjusting the film characteristics and imparting the heat ray reflection function. That is, the sound absorbing material may further include a metal vapor deposition layer on at least one surface of the first resin film and the second resin film.
  • the metal vapor deposition layer can be formed by physical vapor deposition such as vacuum vapor deposition or chemical vapor deposition of metals such as aluminum, copper, zinc, zinc alloy, and silver.
  • the metal vapor deposition layer may be provided on both sides of the resin film, or may be provided on one side.
  • the resin film may be a perforated film from the viewpoint of improving the sound absorbing effect in the low frequency region and adjusting the sound absorbing frequency peak.
  • the perforated film may have holes arranged in a grid pattern or a diamond shape. From the viewpoint of excellent sound absorption characteristics in the low frequency region, the hole may have a circular shape having a diameter of 0.1 to 50.0 mm, a circular shape of 0.2 to 10.0 mm, and 0.3. It may have a circular shape of up to 5.0 mm.
  • the shape of the hole may be circular, elliptical, rectangular, polygonal or the like.
  • the sound absorbing material may further include another base material layer having communication holes and another adhesive layer from the viewpoint of improving the sound absorbing effect in the low frequency region and adjusting the sound absorbing frequency peak. That is, the sound absorbing material includes a first base material layer having communication holes, an adhesive layer (referred to as a first adhesive layer), and a second base material layer having communication holes, and further, a second adhesive layer and A third base material layer having communication holes, a third adhesive layer, a fourth base material layer having communication holes, and the like may be provided in this order.
  • the matters described in the above section of the base material layer and the adhesive layer can be applied to the other base material layer and the other adhesive layer.
  • the thickness of the sound absorbing material can be 1 to 100 mm, may be 2 to 50 mm, or may be 5 to 30 mm from the viewpoint of expressing sound absorbing characteristics, workability of the material, space saving, and the like. Good.
  • the sound absorbing material is 0.3 or more, or 0, measured in accordance with JIS A 1405-1 at any frequency of 1 kHz or less, specifically at at least one of 250 Hz, 500 Hz and 1 kHz. It can have a vertical incident sound absorption coefficient of .4 or more.
  • the vertically incident sound absorption coefficient can be 0.3 or more at 1 kHz, and may be 0.4 or more.
  • the vertically incident sound absorption coefficient can be 0.1 or more at 750 kHz, and may be 0.2 or more.
  • the sound absorption coefficient can be 0.1 or more at 500 kHz, and may be 0.12 or more.
  • the sound absorbing material can be produced by laminating each layer.
  • the sound absorbing material further includes a resin film, the resin film and the first base material layer may not be adhered to each other.
  • the laminate constituting the sound absorbing material may be used in a state of being housed in the housing.
  • the sound absorbing material has excellent sound absorbing characteristics in the low frequency region. Therefore, the sound absorbing material can be suitably used in applications such as automobiles, railroad vehicles, aircraft, ships, buildings such as houses, electronic devices, and precision machinery.
  • the low frequency region referred to here can be a region having a frequency of 1 kHz or less, may be a region of 800 Hz or less, may be a region of 750 Hz or less, or may be a region of 500 Hz or less. ..
  • Double-sided aluminum-deposited polyethylene terephthalate film Al-deposited PET: 12 ⁇ m thick Polyethylene terephthalate film A (PET-A): 12 ⁇ m thick Polyethylene terephthalate film B (PET-B): 25 ⁇ m thick Polyethylene terephthalate film C (PET-C): thickness 50 ⁇ m Polyethylene terephthalate film D (PET-D): thickness 250 ⁇ m Biaxially stretched polypropylene film (OPP): 20 ⁇ m thick Polyethylene film (PE): 25 ⁇ m thick
  • Double-sided tape A 3M Japan Ltd., PGD-100 (0.12 mm thick, base material: non-woven fabric
  • Double-sided tape B Hitachi Chemical Co., Ltd., Hybon 25-563 (0.15 mm thick, base material: Al foil)
  • Adhesive A 3M Japan Ltd., Spray glue No. 77
  • Adhesive B KLEBCHEMIE M. G. Becker GmbH & Co. KG, polyolefin hot melt resin (966P, 50g / m 2 coated)
  • Adhesive C KLEBCHEMIE M. G. Becker GmbH & Co.
  • Adhesive sheet A The Al vapor-deposited PET is provided with the double-sided tape A on both sides.
  • Adhesive sheet B The Al-deposited PET is provided with the adhesive A layer on both sides.
  • Adhesive sheet C Kurashiki Spinning Co., Ltd., Polyolefin hot melt Resin sheet (X4300, 0.05 mm thick)
  • Adhesive sheet D Kurabo Industries Ltd., polyester sheet hot melt resin sheet (G-5, 0.03 mm thick)
  • Adhesive sheet E Kurabo Industries Ltd., polyurethane hot melt resin sheet (S-1700, 0.05 mm thick)
  • Sound absorbing materials having the configurations shown in Tables 2 and 3 were produced. Double-sided tape, adhesive or adhesive sheet was used to bond each layer. In * 1 in the table, the resin film and the first base material are bonded with double-sided tape A or the adhesive A, and the first base material layer and the second base material are bonded with the adhesive sheet A and the adhesive sheet B. Alternatively, double-sided tape B was used.
  • FIGS. 2 to 7 are diagrams showing the vertical incident sound absorption coefficient of each Example and Comparative Example. As shown in the figure, it can be seen that the sound absorbing material of the example is excellent in sound absorbing characteristics in the low frequency region.
  • First base material layer having communication holes 1 ... First base material layer having communication holes, 2 ... Adhesive layer, 3 ... Second base material layer having communication holes, 10 ... Sound absorbing material.

Abstract

The present disclosure pertains to a sound absorbing material comprising, in the following order: a first substrate layer having a communication hole; an adhesive layer; and a second substrate layer having a communication hole.

Description

吸音材Sound absorbing material
　本発明は、吸音材に関する。 The present invention relates to a sound absorbing material.
　メルトブロー不織布からなる単一層の吸音構造体が知られている（例えば、特許文献１）。 A single-layer sound-absorbing structure made of melt-blown non-woven fabric is known (for example, Patent Document 1).
特開２０１２－２１４９５７号公報Japanese Unexamined Patent Publication No. 2012-214957
　不織布からなる単一層の吸音構造体の場合、特に低周波数領域における吸音特性が不充分である。 In the case of a single-layer sound absorbing structure made of non-woven fabric, the sound absorbing characteristics are insufficient, especially in the low frequency region.
　本発明は上記事情に鑑みてなされたものであり、低周波数領域における吸音特性に優れる吸音材を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sound absorbing material having excellent sound absorbing characteristics in a low frequency region.
　本発明は、連通孔を有する第一基材層と、接着剤層と、連通孔を有する第二基材層と、をこの順に備える吸音材を提供する。 The present invention provides a sound absorbing material including a first base material layer having communication holes, an adhesive layer, and a second base material layer having communication holes in this order.
　一態様において、上記第一基材層及び上記第二基材層が、樹脂発泡体又は不織布であってよい。 In one embodiment, the first base material layer and the second base material layer may be a resin foam or a non-woven fabric.
　一態様において、吸音材が上記第一基材層上に、さらに樹脂フィルムを備えてよい。 In one embodiment, the sound absorbing material may further include a resin film on the first base material layer.
　一態様において、上記樹脂フィルムが、ポリオレフィン、ポリエステル又はポリアミドから構成されてよい。 In one embodiment, the resin film may be composed of polyolefin, polyester or polyamide.
　一態様において、吸音材が、上記樹脂フィルムの少なくともいずれかの表面に、金属蒸着層をさらに備えてよい。 In one embodiment, the sound absorbing material may further include a metal vapor deposition layer on at least one surface of the resin film.
　一態様において、吸音材の厚さが１～１００ｍｍであってよい。 In one embodiment, the thickness of the sound absorbing material may be 1 to 100 mm.
　一態様において、吸音材が、１ｋＨｚ以下のいずれかの周波数において、ＪＩＳ　Ａ　１４０５－１に準拠して測定される０．３以上の垂直入射吸音率を有してよい。 In one embodiment, the sound absorbing material may have a vertically incident sound absorption coefficient of 0.3 or more measured in accordance with JIS A 1405-1 at any frequency of 1 kHz or less.
　本発明によれば、低周波数領域における吸音特性に優れる吸音材を提供することができる。 According to the present invention, it is possible to provide a sound absorbing material having excellent sound absorbing characteristics in a low frequency region.
吸音材の模式断面図である。It is a schematic cross-sectional view of a sound absorbing material. 実施例の垂直入射吸音率を示す図である。It is a figure which shows the vertical incident sound absorption coefficient of an Example. 実施例の垂直入射吸音率を示す図である。It is a figure which shows the vertical incident sound absorption coefficient of an Example. 実施例の垂直入射吸音率を示す図である。It is a figure which shows the vertical incident sound absorption coefficient of an Example. 実施例の垂直入射吸音率を示す図である。It is a figure which shows the vertical incident sound absorption coefficient of an Example. 実施例の垂直入射吸音率を示す図である。It is a figure which shows the vertical incident sound absorption coefficient of an Example. 比較例の垂直入射吸音率を示す図である。It is a figure which shows the vertical incident sound absorption coefficient of a comparative example.
＜吸音材＞
　図１は吸音材の模式断面図である。吸音材１０は、連通孔を有する第一基材層１と、接着剤層２と、連通孔を有する第二基材層３と、をこの順に備える。第一基材層側から入射した音（音響エネルギー）は、吸音材を透過する際に熱エネルギーとして散逸される。これにより音の減衰が観察される。 <Sound absorbing material>
FIG. 1 is a schematic cross-sectional view of the sound absorbing material. The sound absorbing material 10 includes a first base material layer 1 having communication holes, an adhesive layer 2, and a second base material layer 3 having communication holes in this order. The sound (sound energy) incident from the first base material layer side is dissipated as heat energy when passing through the sound absorbing material. As a result, sound attenuation is observed.
（基材層）
　連通孔を有する基材層としては、樹脂発泡体、不織布、高分子多孔体、多孔質セラミック等が挙げられる。これらのうち、低周波数領域における吸音特性に優れる観点から、基材層は樹脂発泡体又は不織布であってよい。第一基材層及び第二基材層は、同じ素材から構成されていてもよく、異なる素材から構成されていてもよい。 (Base layer)
Examples of the base material layer having communication holes include a resin foam, a non-woven fabric, a polymer porous body, and a porous ceramic. Of these, the base material layer may be a resin foam or a non-woven fabric from the viewpoint of excellent sound absorption characteristics in the low frequency region. The first base material layer and the second base material layer may be made of the same material or may be made of different materials.
　樹脂発泡体の素材としては、例えば、ポリエチレン樹脂、ポリプロピレン樹脂、ポリウレタン樹脂、ポリエステル樹脂、アクリル樹脂、ポリスチレン樹脂、メラミン樹脂、シリコーン樹脂、天然ゴム、合成ゴム等が挙げられる。耐熱性、難燃性等の観点から、樹脂発泡体の素材はメラミン樹脂であってよい。 Examples of the material of the resin foam include polyethylene resin, polypropylene resin, polyurethane resin, polyester resin, acrylic resin, polystyrene resin, melamine resin, silicone resin, natural rubber, synthetic rubber and the like. From the viewpoint of heat resistance, flame retardancy, etc., the material of the resin foam may be melamine resin.
　不織布を構成する繊維としては、有機繊維及び無機繊維が挙げられる。有機繊維としては、例えば、ポリエチレン（低密度又は高密度）、ポリプロピレン、共重合ポリエチレン、共重合ポリプロピレン等のポリオレフィン繊維、ポリエチレンテレフタレート、ポリトリメチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート、ポリブチレンナフタレート等のポリエステル繊維、アクリル繊維、ポリアミド繊維、ナイロン繊維、レーヨン繊維、ウール等の天然繊維などが挙げられる。また、無機繊維としては、ガラス繊維、金属繊維、セラミックス繊維、炭素繊維等が挙げられる。不織布を構成する繊維は、これらを１種又は２種以上を含むことができる。 Examples of the fibers constituting the non-woven fabric include organic fibers and inorganic fibers. Examples of the organic fiber include polyolefin fibers such as polyethylene (low density or high density), polypropylene, copolymerized polyethylene, and copolymerized polypropylene, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and polybutylene naphthalate. Such as polyester fiber, acrylic fiber, polyamide fiber, nylon fiber, rayon fiber, natural fiber such as wool and the like can be mentioned. Further, examples of the inorganic fiber include glass fiber, metal fiber, ceramic fiber, carbon fiber and the like. The fibers constituting the non-woven fabric may contain one kind or two or more kinds of these.
　基材層の厚さは、低周波数領域における吸音特性に優れる観点から、０．１～５０ｍｍとすることができ、０．５～２０ｍｍであってもよく、２．０～２０ｍｍであってもよく、２．０～１０ｍｍであってもよい。第一基材層及び第二基材層は、同じ厚さを有していてもよく、異なる厚さを有していてもよい。低周波数領域における吸音特性に優れる観点から、第一基材層（音の入射側の基材層）の厚さが、第二基材層の厚さよりも薄くてよい。 The thickness of the base material layer can be 0.1 to 50 mm, 0.5 to 20 mm, or 2.0 to 20 mm from the viewpoint of excellent sound absorption characteristics in the low frequency region. It may be 2.0 to 10 mm. The first base material layer and the second base material layer may have the same thickness or may have different thicknesses. From the viewpoint of excellent sound absorption characteristics in the low frequency region, the thickness of the first base material layer (base material layer on the incident side of sound) may be thinner than the thickness of the second base material layer.
　基材層の目付は、低周波数領域における吸音特性に優れる観点から、１０～１０００ｇ／ｍ２とすることができ、３０～８００ｇ／ｍ２であってもよく、３０～７００ｇ／ｍ２であってもよく、５０～５００ｇ／ｍ２であってもよく、１５０～３００ｇ／ｍ２であってもよい。第一基材層及び第二基材層は、同じ目付を有していてもよく、異なる目付を有していてもよい。 The basis weight of the base material layer can be 10 to 1000 g / m 2 and may be 30 to 800 g / m 2 or 30 to 700 g / m 2 from the viewpoint of excellent sound absorption characteristics in the low frequency region. It may be 50 to 500 g / m 2 or 150 to 300 g / m 2 . The first base material layer and the second base material layer may have the same basis weight or may have different basis weights.
　基材層の密度は、低周波数領域における吸音特性に優れる観点から、０．００５～１．０ｇ／ｃｍ３とすることができ、０．０１０～０．５０ｇ／ｃｍ３であってもよく、０．０１０～０．２０ｇ／ｃｍ３であってもよく、０．０２０～０．２０ｇ／ｃｍ３であってもよく、０．０２０～０．１５ｇ／ｃｍ３であってもよい。第一基材層及び第二基材層は、同じ密度を有していてもよく、異なる密度を有していてもよい。 The density of the base material layer can be 0.005 to 1.0 g / cm 3 or 0.010 to 0.50 g / cm 3 from the viewpoint of excellent sound absorption characteristics in the low frequency region. It may be 0.010 to 0.20 g / cm 3 , 0.020 to 0.20 g / cm 3 , or 0.020 to 0.15 g / cm 3 . The first base material layer and the second base material layer may have the same density or may have different densities.
（接着剤層）
　接着剤層としては、ポリエステル樹脂、酢酸ビニル樹脂、エチレン・酢酸ビニル共重合樹脂、イソブテン・無水マレイン酸共重合樹脂、アクリル共重合樹脂、アクリルモノマー、アクリルオリゴマー、塩化ビニル樹脂、ウレタン樹脂（湿気硬化型含む）、シリル化ウレタン樹脂、エポキシ樹脂、変性エポキシ樹脂、ポリエチレン樹脂等のポリオレフィン樹脂、アイオノマー樹脂、シリコーン樹脂、変性シリコーン樹脂、スチレン・ブタジエンゴム、クロロプレンゴム、ニトリルゴム等の合成ゴム、イソプレンゴム等の天然ゴム、水ガラス、シリケート等の接着成分を含む層、あるいは紙、布、樹脂テープ、金属テープ等から構成される支持体の両面にこれらの接着成分を含む層を備える積層物からなる層などが挙げられる。また、接着剤層は、上記接着成分を含む層又は上記積層物を、樹脂フィルムの両面に備えるもの（接着シート）であってもよい。この場合樹脂フィルムとしては、上記した樹脂フィルムを用いることができる。 (Adhesive layer)
The adhesive layer includes polyester resin, vinyl acetate resin, ethylene / vinyl acetate copolymer resin, isobutene / maleic anhydride copolymer resin, acrylic copolymer resin, acrylic monomer, acrylic oligomer, vinyl chloride resin, and urethane resin (moisture curing). (Including mold), silylated urethane resin, epoxy resin, modified epoxy resin, polyolefin resin such as polyethylene resin, ionomer resin, silicone resin, modified silicone resin, styrene / butadiene rubber, chloroprene rubber, synthetic rubber such as nitrile rubber, isoprene rubber It is composed of a layer containing an adhesive component such as natural rubber, water glass, silicate, etc., or a laminate having a layer containing these adhesive components on both sides of a support composed of paper, cloth, resin tape, metal tape, etc. Layers and the like can be mentioned. Further, the adhesive layer may be one having the layer containing the adhesive component or the laminate on both sides of the resin film (adhesive sheet). In this case, the above-mentioned resin film can be used as the resin film.
　接着剤層は、吸音材がさらに樹脂フィルムを備える場合、樹脂フィルム及び第一基材層間に設けられていてもよい。各接着剤層は、同じ素材から構成されていてもよく、異なる素材から構成されていてもよい。 When the sound absorbing material further includes a resin film, the adhesive layer may be provided between the resin film and the first base material. Each adhesive layer may be composed of the same material or may be composed of different materials.
　接着剤層の厚さは特に限定されないが、接着剤層として上記接着成分を含む層、あるいは積層物からなる層を用いる場合、０．０１～５００μｍとすることができ、０．１～３００μｍであってもよい。各接着剤層は、同じ厚さを有していてもよく、異なる厚さを有していてもよい。なお、接着剤層として上記接着シートを用いる場合、接着剤層の厚さは、１０～１０００μｍとすることができ、１００～５００μｍであってもよい。 The thickness of the adhesive layer is not particularly limited, but when a layer containing the above-mentioned adhesive component or a layer made of a laminate is used as the adhesive layer, it can be 0.01 to 500 μm, and 0.1 to 300 μm. There may be. Each adhesive layer may have the same thickness or may have different thicknesses. When the adhesive sheet is used as the adhesive layer, the thickness of the adhesive layer can be 10 to 1000 μm, or 100 to 500 μm.
（樹脂フィルム）
　吸音材は、低周波数領域における吸音特性に優れる観点から、第一基材層上に、さらに樹脂フィルムを備えることができる。樹脂フィルムを構成する樹脂としては、例えば、ポリエチレン（低密度又は高密度）、ポリプロピレン、共重合ポリエチレン、共重合ポリプロピレン等のポリオレフィン、ポリエチレンテレフタレート、ポリトリメチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート、ポリブチレンナフタレート等のポリエステル、ポリアミドなどが挙げられる。 (Resin film)
The sound absorbing material may further include a resin film on the first base material layer from the viewpoint of excellent sound absorbing characteristics in the low frequency region. Examples of the resin constituting the resin film include polyolefins such as polyethylene (low density or high density), polypropylene, copolymerized polyethylene, and copolymerized polypropylene, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and poly. Examples thereof include polyesters such as butylene naphthalate and polyamides.
　樹脂フィルムの厚さは、低周波数領域における吸音特性に優れる観点から、０．５～５００μｍとすることができ、５～２５０μｍであってもよく、１０～１００μｍであってもよい。第一樹脂フィルム及び第二樹脂フィルムは、同じ厚さを有していてもよく、異なる厚さを有していてもよい。また、低周波数領域における吸音特性に優れる観点から、基材層の厚さに対する樹脂フィルムの厚さの比率（基材層の厚さ／樹脂フィルムの厚さ）は、１～２００００とすることができ、１０～１００００であってもよく、１００～１０００であってもよい。 The thickness of the resin film can be 0.5 to 500 μm, 5 to 250 μm, or 10 to 100 μm from the viewpoint of excellent sound absorption characteristics in the low frequency region. The first resin film and the second resin film may have the same thickness or may have different thicknesses. Further, from the viewpoint of excellent sound absorption characteristics in the low frequency region, the ratio of the thickness of the resin film to the thickness of the base material layer (thickness of the base material layer / thickness of the resin film) may be 1 to 20000. It can be 10 to 10000 or 100 to 1000.
　樹脂フィルムは、フィルム特性の調整による吸音効果の向上機能、及び熱線反射機能の付与の観点から、その表面に金属蒸着層を備えていてもよい。すなわち、吸音材は、上記第一樹脂フィルム及び上記第二樹脂フィルムの少なくともいずれかの表面に、金属蒸着層をさらに備えてよい。金属蒸着層は、アルミニウム、銅、亜鉛、亜鉛合金、銀等の金属を真空蒸着等の物理蒸着又は化学蒸着により形成できる。金属蒸着層は樹脂フィルムの両面に設けられていてもよく、一方の面に設けられていてもよい。 The resin film may be provided with a metal vapor deposition layer on its surface from the viewpoint of improving the sound absorption effect by adjusting the film characteristics and imparting the heat ray reflection function. That is, the sound absorbing material may further include a metal vapor deposition layer on at least one surface of the first resin film and the second resin film. The metal vapor deposition layer can be formed by physical vapor deposition such as vacuum vapor deposition or chemical vapor deposition of metals such as aluminum, copper, zinc, zinc alloy, and silver. The metal vapor deposition layer may be provided on both sides of the resin film, or may be provided on one side.
　樹脂フィルムは、低周波領域の吸音効果の向上及び吸音周波数ピークの調整の観点から、有孔フィルムであってもよい。有孔フィルムは格子状や菱形状に配列した孔を有してよい。当該孔は、低周波数領域における吸音特性に優れる観点から、直径が０．１～５０．０ｍｍの円形状であってよく、０．２～１０．０ｍｍの円形状であってよく、０．３～５．０ｍｍの円形状であってよい。孔の形状は、円形、楕円形、長方形、多角形等であってよい。 The resin film may be a perforated film from the viewpoint of improving the sound absorbing effect in the low frequency region and adjusting the sound absorbing frequency peak. The perforated film may have holes arranged in a grid pattern or a diamond shape. From the viewpoint of excellent sound absorption characteristics in the low frequency region, the hole may have a circular shape having a diameter of 0.1 to 50.0 mm, a circular shape of 0.2 to 10.0 mm, and 0.3. It may have a circular shape of up to 5.0 mm. The shape of the hole may be circular, elliptical, rectangular, polygonal or the like.
（他の基材層及び他の接着剤層）
　吸音材は、低周波領域の吸音効果の向上及び吸音周波数ピークの調整の観点から、さらに連通孔を有する他の基材層及び他の接着剤層を、備えていてもよい。すなわち、吸音材は、連通孔を有する第一基材層、接着剤層（第一接着剤層とする）、及び連通孔を有する第二基材層に加えて、さらに第二接着剤層及び連通孔を有する第三基材層、第三接着剤層及び連通孔を有する第四基材層等をこの順に備えていてもよい。他の基材層及び他の接着剤層には、上記基材層及び接着剤層の項にて説明した事項を適用できる。 (Other base material layer and other adhesive layer)
The sound absorbing material may further include another base material layer having communication holes and another adhesive layer from the viewpoint of improving the sound absorbing effect in the low frequency region and adjusting the sound absorbing frequency peak. That is, the sound absorbing material includes a first base material layer having communication holes, an adhesive layer (referred to as a first adhesive layer), and a second base material layer having communication holes, and further, a second adhesive layer and A third base material layer having communication holes, a third adhesive layer, a fourth base material layer having communication holes, and the like may be provided in this order. The matters described in the above section of the base material layer and the adhesive layer can be applied to the other base material layer and the other adhesive layer.
　吸音材の厚さは、吸音特性の発現、材料の施工性、省スペース化等の観点から、１～１００ｍｍとすることができ、２～５０ｍｍであってもよく、５～３０ｍｍであってもよい。 The thickness of the sound absorbing material can be 1 to 100 mm, may be 2 to 50 mm, or may be 5 to 30 mm from the viewpoint of expressing sound absorbing characteristics, workability of the material, space saving, and the like. Good.
　吸音材は、１ｋＨｚ以下のいずれかの周波数において、具体的には例えば２５０Ｈｚ、５００Ｈｚ及び１ｋＨｚの少なくともいずれかの周波数において、ＪＩＳ　Ａ　１４０５－１に準拠して測定される０．３以上、又は０．４以上の垂直入射吸音率を有することができる。当該垂直入射吸音率は、１ｋＨｚにおいて０．３以上とすることができ、０．４以上であってもよい。当該垂直入射吸音率は、７５０ｋＨｚにおいて０．１以上とすることができ、０．２以上であってもよい。当該吸音率は、５００ｋＨｚにおいて０．１以上とすることができ、０．１２以上であってもよい。 The sound absorbing material is 0.3 or more, or 0, measured in accordance with JIS A 1405-1 at any frequency of 1 kHz or less, specifically at at least one of 250 Hz, 500 Hz and 1 kHz. It can have a vertical incident sound absorption coefficient of .4 or more. The vertically incident sound absorption coefficient can be 0.3 or more at 1 kHz, and may be 0.4 or more. The vertically incident sound absorption coefficient can be 0.1 or more at 750 kHz, and may be 0.2 or more. The sound absorption coefficient can be 0.1 or more at 500 kHz, and may be 0.12 or more.
＜吸音材の製造方法＞
　吸音材は、各層を積層することにより製造することができる。吸音材がさらに樹脂フィルムを備える場合、樹脂フィルムと第一基材層とは接着されていなくてもよい。吸音材を構成する積層体は、筐体に収納された状態で用いてもよい。 <Manufacturing method of sound absorbing material>
The sound absorbing material can be produced by laminating each layer. When the sound absorbing material further includes a resin film, the resin film and the first base material layer may not be adhered to each other. The laminate constituting the sound absorbing material may be used in a state of being housed in the housing.
＜吸音材の用途＞
　上記吸音材は低周波数領域における吸音特性に優れる。そのため、上記吸音材は自動車、鉄道車両、航空機、船舶、住宅等の建築物、電子機器、精密機械などの用途において好適に用いることができる。ここでいう低周波領域とは、周波数が１ｋＨｚ以下の領域とすることができ、８００Ｈｚ以下の領域であってもよく、７５０Ｈｚ以下の領域であってもよく、５００Ｈｚ以下の領域であってもよい。 <Use of sound absorbing material>
The sound absorbing material has excellent sound absorbing characteristics in the low frequency region. Therefore, the sound absorbing material can be suitably used in applications such as automobiles, railroad vehicles, aircraft, ships, buildings such as houses, electronic devices, and precision machinery. The low frequency region referred to here can be a region having a frequency of 1 kHz or less, may be a region of 800 Hz or less, may be a region of 750 Hz or less, or may be a region of 500 Hz or less. ..
　以下、実施例によって本発明を更に詳細に説明するが、本発明はこれらの実施例に限定されるものではない。 Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.
（基材層の準備）
　表１に示す基材層を準備した。 (Preparation of base material layer)
The base material layer shown in Table 1 was prepared.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
（樹脂フィルムの準備）
　以下の樹脂フィルムを準備した。
両面アルミニウム蒸着ポリエチレンテレフタレートフィルム（Ａｌ蒸着ＰＥＴ）：厚さ１２μｍ
ポリエチレンテレフタレートフィルムＡ（ＰＥＴ－Ａ）：厚さ１２μｍ
ポリエチレンテレフタレートフィルムＢ（ＰＥＴ－Ｂ）：厚さ２５μｍ
ポリエチレンテレフタレートフィルムＣ（ＰＥＴ－Ｃ）：厚さ５０μｍ
ポリエチレンテレフタレートフィルムＤ（ＰＥＴ－Ｄ）：厚さ２５０μｍ
２軸延伸ポリプロピレンフィルム（ＯＰＰ）：厚さ２０μｍ
ポリエチレンフィルム（ＰＥ）：厚さ２５μｍ (Preparation of resin film)
The following resin films were prepared.
Double-sided aluminum-deposited polyethylene terephthalate film (Al-deposited PET): 12 μm thick
Polyethylene terephthalate film A (PET-A): 12 μm thick
Polyethylene terephthalate film B (PET-B): 25 μm thick
Polyethylene terephthalate film C (PET-C): thickness 50 μm
Polyethylene terephthalate film D (PET-D): thickness 250 μm
Biaxially stretched polypropylene film (OPP): 20 μm thick
Polyethylene film (PE): 25 μm thick
（接着剤層の準備）
　以下の接着剤層を準備した。
両面テープＡ：スリーエムジャパン株式会社、ＰＧＤ－１００（０．１２ｍｍ厚、基材：不織布）
両面テープＢ：日立化成株式会社、ハイボン２５－５６３（０．１５ｍｍ厚、基材：Ａｌ箔）
接着剤Ａ：スリーエムジャパン株式会社、スプレーのり７７番
接着剤Ｂ：ＫＬＥＢＣＨＥＭＩＥ　Ｍ．Ｇ．Ｂｅｃｋｅｒ　ＧｍｂＨ＆Ｃｏ．ＫＧ、ポリオレフィンホットメルト樹脂（９６６Ｐ、５０ｇ／ｍ２塗布）
接着剤Ｃ：ＫＬＥＢＣＨＥＭＩＥ　Ｍ．Ｇ．Ｂｅｃｋｅｒ　ＧｍｂＨ＆Ｃｏ．ＫＧ、合成ゴムホットメルト樹脂（９３９Ｓ、５０ｇ／ｍ２塗布）
接着剤Ｄ：ＫＬＥＢＣＨＥＭＩＥ　Ｍ．Ｇ．Ｂｅｃｋｅｒ　ＧｍｂＨ＆Ｃｏ．ＫＧ、湿気硬化型ポリウレタンホットメルト樹脂（ＰＵＲ７００．５、５０ｇ／ｍ２塗布）
接着シートＡ：上記Ａｌ蒸着ＰＥＴの両面に上記両面テープＡを備えるもの
接着シートＢ：上記Ａｌ蒸着ＰＥＴの両面に上記接着剤Ａの層を備えるもの
接着シートＣ：倉敷紡績株式会社、ポリオレフィンホットメルト樹脂シート（Ｘ４３００、０．０５ｍｍ厚）
接着シートＤ：倉敷紡績株式会社、ポリエステルシートホットメルト樹脂シート（Ｇ－５、０．０３ｍｍ厚）
接着シートＥ：倉敷紡績株式会社、ポリウレタンホットメルト樹脂シート（Ｓ－１７００、０．０５ｍｍ厚） (Preparation of adhesive layer)
The following adhesive layers were prepared.
Double-sided tape A: 3M Japan Ltd., PGD-100 (0.12 mm thick, base material: non-woven fabric)
Double-sided tape B: Hitachi Chemical Co., Ltd., Hybon 25-563 (0.15 mm thick, base material: Al foil)
Adhesive A: 3M Japan Ltd., Spray glue No. 77 Adhesive B: KLEBCHEMIE M. G. Becker GmbH & Co. KG, polyolefin hot melt resin (966P, 50g / m 2 coated)
Adhesive C: KLEBCHEMIE M. G. Becker GmbH & Co. KG, synthetic rubber hot melt resin (939S, 50g / m 2 applied)
Adhesive D: KLEBCHEMIE M. G. Becker GmbH & Co. KG, moisture-curable polyurethane hot-melt resin (PUR700.5, 50g / m 2 applied)
Adhesive sheet A: The Al vapor-deposited PET is provided with the double-sided tape A on both sides. Adhesive sheet B: The Al-deposited PET is provided with the adhesive A layer on both sides. Adhesive sheet C: Kurashiki Spinning Co., Ltd., Polyolefin hot melt Resin sheet (X4300, 0.05 mm thick)
Adhesive sheet D: Kurabo Industries Ltd., polyester sheet hot melt resin sheet (G-5, 0.03 mm thick)
Adhesive sheet E: Kurabo Industries Ltd., polyurethane hot melt resin sheet (S-1700, 0.05 mm thick)
（吸音材の作製）
　表２及び表３に示す構成を有する吸音材を作製した。各層の接着には、両面テープ、接着剤又は接着シートを用いた。表中の※１では、樹脂フィルム及び第一基材層間の接着を両面テープＡ又は接着剤Ａにて、第一基材層及び第二基材層間の接着を接着シートＡ、接着シートＢ、又は両面テープＢにて行った。 (Making sound absorbing material)
Sound absorbing materials having the configurations shown in Tables 2 and 3 were produced. Double-sided tape, adhesive or adhesive sheet was used to bond each layer. In * 1 in the table, the resin film and the first base material are bonded with double-sided tape A or the adhesive A, and the first base material layer and the second base material are bonded with the adhesive sheet A and the adhesive sheet B. Alternatively, double-sided tape B was used.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
（吸音材の吸音特性評価）
　作製した各吸音材の垂直入射吸音率を、以下に従って測定した。表２中の左に記載した層側から音を入射した。測定結果を表４及び表５に示す。
　　装置名：４２０６型インピーダンス管（ブリュエル・ケアー社）
　　測定方法：垂直入射吸音率（ＪＩＳ　Ａ　１４０５－１に準拠）
　　測定範囲：５０～１６００Ｈｚ (Evaluation of sound absorption characteristics of sound absorbing material)
The vertically incident sound absorption coefficient of each of the produced sound absorbing materials was measured according to the following. Sound was incident from the layer side described on the left in Table 2. The measurement results are shown in Tables 4 and 5.
Device name: 4206 type impedance tube (Bruel Care)
Measurement method: Vertically incident sound absorption coefficient (based on JIS A 1405-1)
Measurement range: 50 to 1600 Hz
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000005
Figure JPOXMLDOC01-appb-T000005
　図２～７は、各実施例及び比較例の垂直入射吸音率を示す図である。同図に示されるように、実施例の吸音材は低周波数領域における吸音特性に優れることが分かる。 FIGS. 2 to 7 are diagrams showing the vertical incident sound absorption coefficient of each Example and Comparative Example. As shown in the figure, it can be seen that the sound absorbing material of the example is excellent in sound absorbing characteristics in the low frequency region.
　１…連通孔を有する第一基材層、２…接着剤層、３…連通孔を有する第二基材層、１０…吸音材。
  1 ... First base material layer having communication holes, 2 ... Adhesive layer, 3 ... Second base material layer having communication holes, 10 ... Sound absorbing material.

Claims (7)

  1. 　連通孔を有する第一基材層と、接着剤層と、連通孔を有する第二基材層と、をこの順に備える吸音材。 A sound absorbing material including a first base material layer having communication holes, an adhesive layer, and a second base material layer having communication holes in this order.
  2. 　前記第一基材層及び前記第二基材層が、樹脂発泡体又は不織布である、請求項１に記載の吸音材。 The sound absorbing material according to claim 1, wherein the first base material layer and the second base material layer are resin foams or non-woven fabrics.
  3. 　前記第一基材層上に、さらに樹脂フィルムを備える、請求項１又は２に記載の吸音材。 The sound absorbing material according to claim 1 or 2, further comprising a resin film on the first base material layer.
  4. 　前記樹脂フィルムが、ポリオレフィン、ポリエステル又はポリアミドから構成される、請求項３に記載の吸音材。 The sound absorbing material according to claim 3, wherein the resin film is composed of polyolefin, polyester or polyamide.
  5. 　前記樹脂フィルムの少なくともいずれかの表面に、金属蒸着層をさらに備える、請求項３又は４に記載の吸音材。 The sound absorbing material according to claim 3 or 4, further comprising a metal vapor deposition layer on at least one surface of the resin film.
  6. 　厚さが１～１００ｍｍである、請求項１～５のいずれか一項に記載の吸音材。 The sound absorbing material according to any one of claims 1 to 5, which has a thickness of 1 to 100 mm.
  7. 　１ｋＨｚ以下のいずれかの周波数において、ＪＩＳ　Ａ　１４０５－１に準拠して測定される０．３以上の垂直入射吸音率を有する、請求項１～６のいずれか一項に記載の吸音材。
          The sound absorbing material according to any one of claims 1 to 6, which has a vertically incident sound absorption coefficient of 0.3 or more measured in accordance with JIS A 1405-1 at any frequency of 1 kHz or less.
PCT/JP2020/016745 2019-04-18 2020-04-16 Sound absorbing material WO2020213685A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021514220A JPWO2020213685A1 (en) 2019-04-18 2020-04-16

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JPPCT/JP2019/016688 2019-04-18
PCT/JP2019/016688 WO2020213140A1 (en) 2019-04-18 2019-04-18 Sound-absorbing material

Publications (1)

Publication Number Publication Date
WO2020213685A1 true WO2020213685A1 (en) 2020-10-22

Family

ID=72837135

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/JP2019/016688 WO2020213140A1 (en) 2019-04-18 2019-04-18 Sound-absorbing material
PCT/JP2020/016745 WO2020213685A1 (en) 2019-04-18 2020-04-16 Sound absorbing material

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/016688 WO2020213140A1 (en) 2019-04-18 2019-04-18 Sound-absorbing material

Country Status (3)

Country Link
JP (1) JPWO2020213685A1 (en)
TW (1) TW202100350A (en)
WO (2) WO2020213140A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022219807A1 (en) 2021-04-16 2022-10-20 昭和電工マテリアルズ株式会社 Sound absorbing material, and vehicle member

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11242486A (en) * 1998-02-26 1999-09-07 Isuzu Motors Ltd Sound absorber and shield plate
JP2004130731A (en) * 2002-10-11 2004-04-30 Kanegafuchi Chem Ind Co Ltd Interior finishing material and interior finishing material for vehicle
JP2012024955A (en) * 2010-07-21 2012-02-09 Tsuchiya Co Ltd Molding using composite material, and method of manufacturing the same
JP2018169555A (en) * 2017-03-30 2018-11-01 Jnc株式会社 Laminated sound absorbing material including nanofibers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11242486A (en) * 1998-02-26 1999-09-07 Isuzu Motors Ltd Sound absorber and shield plate
JP2004130731A (en) * 2002-10-11 2004-04-30 Kanegafuchi Chem Ind Co Ltd Interior finishing material and interior finishing material for vehicle
JP2012024955A (en) * 2010-07-21 2012-02-09 Tsuchiya Co Ltd Molding using composite material, and method of manufacturing the same
JP2018169555A (en) * 2017-03-30 2018-11-01 Jnc株式会社 Laminated sound absorbing material including nanofibers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022219807A1 (en) 2021-04-16 2022-10-20 昭和電工マテリアルズ株式会社 Sound absorbing material, and vehicle member

Also Published As

Publication number Publication date
JPWO2020213685A1 (en) 2020-10-22
TW202100350A (en) 2021-01-01
WO2020213140A1 (en) 2020-10-22

Similar Documents

Publication Publication Date Title
EP2311028B1 (en) Multilayer sound absorbing sheet and method of absorbing sound
KR101983414B1 (en) Acoustic decorative material
WO2021049224A1 (en) Sound absorbing/insulating material
WO2020213685A1 (en) Sound absorbing material
WO2020213676A1 (en) Sound-absorbing material
JP2004130731A (en) Interior finishing material and interior finishing material for vehicle
WO2020213684A1 (en) Sound-absorbing material
WO2023276151A1 (en) Sound absorbing material, and vehicle member
WO2021182466A1 (en) Sound absorbing material, sound absorbing property improving member, and vehicle member
JP7439693B2 (en) sound absorbing material
WO2021182468A1 (en) Sound absorbing material, sound absorption performance improving member, and vehicle member
WO2021015168A1 (en) Sound-absorbing material, coating solution for improving sound absorption, and sheet for improving sound absorption
WO2022219807A1 (en) Sound absorbing material, and vehicle member
JP2022066830A (en) Sound absorber
JP2022034238A (en) Sound absorbing material
JP2022025870A (en) Heat shield sound absorption material
JP2006110912A (en) Multilayer skin material and laminate for interior material laminated with the same
JP2022162918A (en) Laminate panel
WO2020026923A1 (en) Laminate sound-absorbing material
JP2023154823A (en) Manufacturing method of sound absorption material, sound absorption material and vehicle member
JP2022162917A (en) Laminate panel
JP2021138143A (en) Laminate
KR20200011703A (en) Lightweight noise absorbing material and substrates attaching thereof
JPWO2020059460A1 (en) Laminate
KR20200011695A (en) Lightweight noise absorbing material

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20790475

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021514220

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20790475

Country of ref document: EP

Kind code of ref document: A1