Study Relationship between the Amount of Channel Black and Underwater Acoustic Property of PU Material

Effect of the amount of channel black on underwater sound insulation property of PU material was researched. The results showed that amount of channel black had obvious effect on underwater sound insulation property of PU material. Under one atmospheric pressure, the underwater sound insulation property of PU material is most poor when the amount of channel black is 60%, and quite equivalent when the amount of channel is 30% and 45%. Under lower underwater pressure, effect of the amount of channel black on underwater sound insulation property of PU material is almost negligible and under higher underwater pressure, the underwater sound insulation property of PU material is best when the amount of channel black is 45%,is good and poor when the amount of the channel black are 30% and 60% respectively.