use of an acoustic formteils polyurethane foam with low water and u00f6labsorption

摘要

A noise insulating member (2, 4, 6, 8, 10, 12) having a low degree of water absorbency and a low degree of oil absorbency. The noise insulating member is characterized by including a polyurethane foam obtained by reaction of an organic polyisocyanate component and a polyol component in the presence of a fluorine-containing surfactant, and having a cellular network having cells and communication holes which communicate with said cells. The communication holes have respective diameters each of which is not larger than 60 mu m. IMAGE