FIBER AGGREGATE COMPOSED OF TWO OR MORE KINDS OF POLYIMIDE FIBERS HAVING DIFFERENT TEMPERATURE FOR LOWERING STORAGE ELASTIC MODULUS

摘要

PROBLEM TO BE SOLVED: To provide a material being light and a heat insulating/sound-absorbing material excellent in sound absorbing characteristics and optimum to aircraft applications and useful for lowering weights of aircraft and improving fuel consumption, not only for aircraft application, but for heat retention and heat insulation of piping requiring heat insulation and a sound-absorbing material in a space requiring sound absorption, in addition, for a material expressing functions such as vibration isolation and vibration control by increasing a bulk density.;SOLUTION: The fiber aggregate includes two or more kinds of polyimide fibers 100, 101 having different temperatures for lowering storage elastic modulus. The fibers at least mutually bind through at least one kind of the polyimide fiber.;COPYRIGHT: (C)2009,JPO&INPIT