SOUND ABSORBING COMPONENT

• Main Authors: NAGAYAMA, KATSUHIRO, FUJIMAKI, MASAMI, YOSHITAKE, HIROYUKI, MASUI, SYOHEI, MATSUMOTO, TAIJI, FUNAKOSHI, SATORU, SUNADA, MITUAKI
• Format: Patent
• Language: English; French; Japanese
• Published: 19.09.1996
• Edition: 6
• Subjects: ACOUSTICS; ACOUSTICS NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; PERFORMING OPERATIONS; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SOUND-PRODUCING DEVICES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A sound absorbing component includes an expanded body of a fiber-reinforced thermoplastic resin having a voidity of at least 50 vol.% and a resin molded body, wherein an air layer is disposed between the expanded body and the resin molded body. Though light in weight and small in thickness, this sound absorbing component effectively absorbs sounds in a frequency range of 500 to 3,000 Hz of noise outside the car, which is a problem particularly of a car. L'invention concerne un élément insonorisant constitué d'une partie expansée en résine thermoplastique armée de fibres d'une vacuité d'au moins 50 % en volume, et d'une partie en résine moulée, séparées par une couche d'air. Malgré sa légèreté et sa faible épaisseur, cet élément est capable d'absorber efficacement les sons dans une gamme de fréquences comprise entre 500 et 3 000 Hz et est particulièrement indiqué dans l'isolation phonique des véhicules.