NON-WOVEN CLOTH, LAYERED NON-WOVEN CLOTH COMPRISING SAID NON-WOVEN CLOTH, AND COMPOSITE SOUND-ABSORBING MATERIAL IN WHICH LAYERED NON-WOVEN CLOTH IS USED AS SKIN MATERIAL

• Main Authors: OKAMURA CHIE, OBI RUMINA, NAKANISHI YASUO, SHIOTA EIJI, KATO KAZUFUMI, YAMAMURO SHINYA
• Format: Patent
• Language: Chinese; English
• Published: 30.07.2021
• Subjects: ACOUSTICS; ACOUSTICS NOT OTHERWISE PROVIDED FOR; BRAIDING; COTTON-WOOL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; KNITTING; LACE-MAKING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; NON-WOVEN FABRICS; PERFORMING OPERATIONS; PHYSICS; SOUND-PRODUCING DEVICES; TEXTILES; TRANSPORTING; TRIMMINGS; WADDING

Provided are a non-woven cloth and a layered non-woven cloth that are preferred as a skin material for a composite sound-absorbing material, which has excellent moldability and exceptional shape stability, and with which it is possible to achieve an adequate sound-absorption effect even in thin low-weight regions. The present invention pertains to: a non-woven cloth having a layered structure in which at least one ultrafine fiber layer (M) having an average fiber diameter of 0.3-7 mum and at least one continuous long fiber layer (S) having an average fiber diameter of 10-30 mum are integrated, wherein the non-woven cloth is characterized in that the adhesion area ratio of the ultrafine fiber layer (M) and the continuous long fiber layer (S) is 45-80%; a method for manufacturing the non-woven cloth; a layered non-woven cloth in which two or more layers of the non-woven cloth are layered; and a composite sound-absorbing material in which the non-woven cloth or the layered non-woven cloth, and an open-cell resin