SOUNDPROOF DRAIN PIPE

摘要

PROBLEM TO BE SOLVED: To provide a soundproof drain pipe having soundproofness and fire resistance, particularly, improved fire resistance even when a nominal diameter is 125ϕor larger.

SOLUTION: The soundproof drain pipe 11 comprises a soundproof member 13 consisting of a sound shielding layer 16 and a sound absorbing layer 15 and covering the peripheral face of a pipe body 12 with the sound absorbing layer 15 as an inside layer. The sound absorbing layer 15 uses a glass wool sheet containing glass fibers as structural fibers which have average fiber diameters of 5-10μm, fiber lengths of 0.2-75 mm and fiber density in a range over 70 kg/m3but not over 100 kg/m3.

COPYRIGHT: (C)2009,JPO&INPIT