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1. WO2020194788 - LAMINATED SOUND ABSORBING MATERIAL

Publication Number WO/2020/194788
Publication Date 01.10.2020
International Application No. PCT/JP2019/035016
International Filing Date 05.09.2019
IPC
G10K 11/16 2006.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11Methods 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
16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
B32B 5/24 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
5Layered products characterised by the non-homogeneity or physical structure of a layer
22characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous
24one layer being a fibrous or filamentary layer
B32B 7/02 2019.01
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
7Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
02Physical, chemical or physicochemical properties
G10K 11/168 2006.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11Methods 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
16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
162Selection of materials
168Plural layers of different materials, e.g. sandwiches
Applicants
  • JNC株式会社 JNC CORPORATION [JP]/[JP]
  • JNCファイバーズ株式会社 JNC FIBERS CORPORATION [JP]/[JP]
Inventors
  • 服部 貴之 HATTORI Takayuki
  • 伊東 秀実 ITO Hidemi
Priority Data
2019-05464722.03.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) LAMINATED SOUND ABSORBING MATERIAL
(FR) MATÉRIAU ABSORBANT ACOUSTIQUE STRATIFIÉ
(JA) 積層吸音材
Abstract
(EN)
The present invention addresses the problem of providing a sound absorbing material which exhibits excellent sound absorbing performance in low-frequency and intermediate-frequency ranges, and preferably also in higher-frequency ranges. This laminated sound absorbing material includes at least: a fiber layer; and a porous layer, wherein the fiber layer has an average flowrate fine pore diameter of 1.0-60 µm and an air permeability as measured with a Frazier form method of 30-220 cc/cm2·s, and the porous layer comprises at least one selected from the group consisting of foamed resins, unwoven fabrics, and woven fabrics, has a thickness of 3-40 mm and a density of 3-50 kg/m3 which is lower than that of the fiber layer, and is disposed such that the fiber layer is on the sound entry side.
(FR)
La présente invention aborde le problème de la réalisation d'un matériau absorbant acoustique qui présente d'excellentes performances d'absorption acoustique dans des plages de basses fréquences et de fréquences intermédiaires, de préférence également dans des plages de hautes fréquences. Ce matériau absorbant acoustique stratifié comprend au moins : une couche de fibres; et une couche poreuse, la couche de fibres présentant un diamètre de pore fin de débit moyen de 1,0 à 60 µm et une perméabilité à l'air telle que mesurée à l'aide d'un procédé de formation de Frazier de 30 à 220 cc/cm2·s, et la couche poreuse comprenant au moins un élément choisi dans le groupe constitué par les résines expansées, les tissus non tissés et les tissus tissés, présentant une épaisseur de 3 à 40 mm et une densité de 3 à 50 kg/m3 qui est inférieure à celle de la couche de fibres, et étant disposée de telle sorte que la couche de fibres se trouve sur le côté d'entrée sonore.
(JA)
低周波数領域及び中周波数領域、好ましくはさらに高周波数領域において優れた吸音性を有する吸音材を提供することを課題とする。 少なくとも繊維層と、多孔質層とを含む積層吸音材であって、前記繊維層は、平均流量細孔径が1.0~60μm、フラジール形法による通気度が30~220cc/cm・sであり、前記多孔質層は、発泡樹脂、不織布及び織布からなる群から選ばれる少なくとも1種からなる層であって、厚みが3~40mm、密度が前記繊維層よりも低く、かつ3~50kg/mであり、前記の繊維層が音の入射側となるように配置される、積層吸音材。
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