A sound absorbing material comprising a nonwoven fibrous acoustic insulation material and a flow resistive non-woven facing, wherein the flow resistive nonwoven facing is bonded to the insulation material and has an air flow resistance of from about 600 to about 1800 Rayls and a surface mass of from about 20 to about 150 g/m2.
申请公布号
US8534419(B2)
申请公布日期
2013.09.17
申请号
US200913124645
申请日期
2009.10.16
申请人
COATES MICHAEL WILLIAM;KIERZKOWSKI MAREK;GIBBONS PHILIP JOHN;ZEPHYROS, INC.
发明人
COATES MICHAEL WILLIAM;KIERZKOWSKI MAREK;GIBBONS PHILIP JOHN
