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1. (WO2018021319) FIBERS FOR SOUND ABSORBING/INSULATING MATERIAL, USE OF SAID FIBERS, MANUFACTURING METHOD FOR FIBERS FOR SOUND ABSORBING/INSULATING MATERIAL, AND FIBER-MOLDED PRODUCT FOR SOUND ABSORBING/INSULATING MATERIAL

Pub. No.:    WO/2018/021319    International Application No.:    PCT/JP2017/026884
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Wed Jul 26 01:59:59 CEST 2017
IPC: G10K 11/162
B60R 13/08
D01F 6/38
Applicants: MITSUBISHI CHEMICAL CORPORATION
三菱ケミカル株式会社
Inventors: INAGAKI, Tatsuhiko
稲垣 達彦
Title: FIBERS FOR SOUND ABSORBING/INSULATING MATERIAL, USE OF SAID FIBERS, MANUFACTURING METHOD FOR FIBERS FOR SOUND ABSORBING/INSULATING MATERIAL, AND FIBER-MOLDED PRODUCT FOR SOUND ABSORBING/INSULATING MATERIAL
Abstract:
The present invention addresses the problem of providing fibers of 0.01-0.5 dtex which are used for a sound absorbing/insulating material and with which a fiber assembly with excellent sound absorbing/insulating effects can be obtained. The present invention also addresses the problem of providing a fiber-molded product for sound absorbing/insulating material in which said fibers are used, the product being suitable for a sound absorbing effect of sound less than or equal to 1,000 Hz. The problem can be solved by, in the fiber-molded product described below having a single-fiber fineness of 0.01-0.5 dtex, providing fibers for sound absorbing/insulating material in which the average value of the normal incidence sound absorption coefficient of the fiber-molded product for sound having a frequency of 200-1,000 Hz is 40% or more, and by using the fibers for sound absorbing/insulating material to mold the fiber-molded product for sound absorbing/insulating material. (Fiber-molded product) 70 mass% of fibers for sound absorbing/insulating material having a fiber length of 40 mm, and 30 mass% of polyester thermally fusible fibers having a single-fiber fineness of 2.2 dtex, a fiber length of 51 mm, and a melting point of 110°C are mixed; heated for 20 minutes at 170°C; and then cooled to form a fiber-molded product having a thickness of 30 mm and a basis weight of 1,200 g/m2.