Acoustical insulating barrier and method of making

专利名称：Acoustical insulating barrier and method of

making the barrier

发明人：John J. Hiers,John K. Fletcher申请号：US09/309574申请日：19990511公开号：US061093A公开日：20000829

摘要：A needled composite acoustical barrier is provided. The barrier has a non-wovenfirst layer (13) of needleable textile first fibers (13a); the layer (13) has a thickness ofbetween about 0.01 inch and 0.5 inch and a density of between about 1.0 and 10 lbs. percubic foot. A non-woven, low density second layer (15) of textile second fibers (15a) isprovided; the second layer (15) has a thickness of between about 0.2 inch and 5 inchesand a density of between about 0.1 and 4.0 lbs. per cubic foot. A high- density

intermediate acoustical barrier layer (14) is disposed between the first and second layers(13, 15); the intermediate barrier layer (14) has a thickness of between about 0.01 inchand 0.5 inch, a density of at least 50 lbs. per cubic foot, and the barrier layer has a

substantially continuous film of high-density needleable polymeric material. A plurality ofneedled stitches (19), formed from the first fibers (13a), extend from the first layer (13),through the intermediate barrier layer (14) and at least into the second layer (15).

申请人：LYDALL, INC.

代理机构：Birch, Stewart, Kolasch & Birch, LLP

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