SHEET FOR VIBRATION-DAMPING MATERIAL

摘要

PROBLEM TO BE SOLVED: To readily produce a thin speaker edge used for a small-sized speaker and having 10-300μm thickness and the other vibration-damping materials so as to have small thickness unevenness by sheet molding. SOLUTION: The sheet is molded from a thermoplastic elastomer comprising a mixture of polypropylene with a styrene-based elastomer as a main component. In the sheet, a curing agent content of the styrene-based elastomer is≤0.2 wt.% and weight mixing ratio of the polypropylene to the styrene-based thermoplastic elastomer is (90/10) to (30/70) and the thickness of the sheet is 10-300μm and tanδat 25°C is≥0.09. COPYRIGHT: (C)2004,JPO&NCIPI