| 摘要 |
PURPOSE:To provide the subject material which is excellent in impact strength and stiffness (bending modulus), prevents the resonance in a low-frequency region, and is improved in the persistence of acoustic properties. CONSTITUTION:This material comprises a compsn. consisting of 20-50wt.% ethylene-propylene block copolymer, 5-10wt.% low-density polyethylene, and 40-75wt.% filler having a mean particle diameter of 5.0mum or lower. |
