Sound absorbing material, multilayer sound absorbing material, molded product of multilayer sound absorbing material, sound absorbing interior material, and sound absorbing floor covering material
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United States of America Patent
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Mar 12, 2013
Grant Date -
Aug 4, 2011
app pub date -
Mar 18, 2009
filing date -
Oct 2, 2008
priority date (Note) -
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Abstract
The object of the present invention is to provide a sound absorbing material having a light weight and excellent sound absorbing performance, and a sound absorbing material consisting of a fiber sheet made of fibers containing at least 50% by mass of a porous fiber having many minute pores, each minute pore opening onto the surface of the porous fiber, and having an airflow resistance in the range of between 0.05 and 3.0 kPa·s/m.
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