Patent ID: 7837009

Claim:
A nonwoven material comprising a core, containing: (A) from about 95 weight percent to about 40 weight percent matrix fibers, wherein the matrix fibers comprise individuali.Jed cellulosic fibers, (B) from about 60 weight percent to about 5 weight percent core binder, where weight percentages in the core are based on the total weight of the core, and (C) a fire-retardant, such that the nonwoven material has a Burn Through Time in a fire barrier screening test of about 1 minute or greater; and where (D) the core has a basis weight of from about 200 gsm to about 3000 gsm, (E) the core has a density of from about 0.015 g/cc to about 0.10 g/cc, and (F) the nonwoven material has sound transmission reduction of 5 decibel or greater in an LSTT sound transmission test.