| 摘要 |
PURPOSE: A sound absorbing sheet and a manufacturing method thereof are provided to maximize sound absorbing performance and to manufacture the sound absorbing sheet in which an average sound absorbing rate at a frequency range of 200-2000Hz is 0.4 or greater. CONSTITUTION: A sound absorbing sheet comprises a base in which a resin composition is impregnated. An average sound absorbing rate of the sheet at a frequency range of 200-2000Hz is 0.4 or greater. The base comprises 40-90 weight% of a glass fiber and 10-70 weight% of a cellulosic fiber. |
