| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a vibration control property and a sound absorbing property of a sound absorbing material while reducing a weight thereof. <P>SOLUTION: A sound absorbing material comprises: polyurethane foam 12 having a glass transition point in the vicinity of room temperature; and a nonwoven fabric 14 stacked on the polyurethane foam 12 and having a weight per unit area of 10 g/m<SP POS="POST">2</SP>or more and less than 20 g/m<SP POS="POST">2</SP>. The polyurethane foam 12 having a glass transition point in the vicinity of room temperature is low-repulsive and hence may improve a vibration control property. Besides, when the weight per unit area of the nonwoven fabric 14 is set to be small, the weight may be reduced and a sound absorbing property may be improved. <P>COPYRIGHT: (C)2013,JPO&INPIT |
