| 摘要 |
PURPOSE: To provide a polycarbonate transparent soundproof panel excellent in soundproof function, transparency, light perviousness and visibility. CONSTITUTION: A soundproof panel consists of a polycarbonate single layer with a wt. average mol.wt. of below 35,000 or a transparent laminate layer containing the same and a polyvinyl butyral layer plasticized by phthalic diester derived from 9-30C aliphatic alcohol and is obtained by integrating at least three transparent layers. More excellent soundproofness can be imparted to the soundproof panel without losing the transparency, impact resistance and on-the-spot execution properties possessed by a conventional polycarbonate sheet. |
