| abstract |
The present invention is a kind of acoustic material, the peak of the soft material (A) and the losstangenttanĪ“ found out by Measurement of Dynamic Viscoelasticity that are present in -60 DEG C of temperature ranges more than and less than 0 DEG C with the peak that following ratios include the losstangenttanĪ“ found out by Measurement of Dynamic Viscoelasticity is present in the resin (B) of 0 DEG C or more and 60 DEG C temperature range below, the ratio is that resin (B) is 1~50 mass parts relative to 100 mass parts of soft material (A).Acoustic material of the invention is the material that superior acoustic characteristic is realized in the case where not depending on complicated shape and not increasing weight. |