| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a sound absorbing material which is excellent in sound absorbing properties and has a high added value when soft polyurethane foam is recycled to mold the sound absorbing material. SOLUTION: A sound absorbing sheet 18 comprises a polyurethane foam part 18b and a film part 18a. The peel strength between the foam part 18b and the film part 18a is below 0.16 kg/cm. By setting the range of peel strength, the resonant vibration of the film part 18a is promoted, improving the sound absorbing characteristics.</p> |
