| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lightweight/thin complex nonwoven fabric for a sound absorption material excellent in sound absorption performance in a frequency region of 3,000-5,000 Hz, producible easily and inexpensively, and further excellent in flame resistance.SOLUTION: A complex nonwoven fabric for a sound absorption material includes a laminated structure formed by laminating a short fiber nonwoven fabric containing crimped hollow fibers and a sound absorption film layer comprising a synthetic resin film. The thickness of the short fiber nonwoven fabric is below 12 mm, and the thickness of the sound absorption film layer is 20-60μm.</p> |
