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    • 4. 发明申请
    • HIGHLY ACOUSTICAL, WET-FORMED SUBSTRATE
    • 高度声学的,湿润的基材
    • WO2009032250A1
    • 2009-03-12
    • PCT/US2008/010325
    • 2008-08-29
    • ARMSTRONG WORLD INDUSTRIES, INC.WIKER, Anthony, L.GARMAN, Robert, C.
    • WIKER, Anthony, L.GARMAN, Robert, C.
    • C04B26/02B29C67/24E04B1/84
    • D21J1/16E04B2103/04
    • An acoustic fiber-based substrate composed primarily of insulation-type spun fibers or blends of such fibers and wheel spun fibers. The fibers are bound with a water dispersible latex binder, or starch in conjunction with cellulose fiber. The insulation-type spun fibers can be first quality virgin, post-industrial waste-stream or post-consumer waste stream fiber. The substrate is wet-formed from a very dilute aqueous dispersion of ingredients onto a mesh forming screen, as on a Fourdrinier paper machine. By virtue of the insulation-type spun fiber dimensions, morphology and orientation: very low density wet-mats can be formed from a sufficiently dilute suspension. The low density and highly porous substrate is highly absorbing, exhibiting noise reduction coefficients, NRC values of about 0.80 or greater.
    • 主要由绝缘型纺丝纤维或这种纤维和轮纺纤维的混合物组成的基于声学纤维的基材。 纤维与水分散性胶乳粘合剂或淀粉与纤维素纤维结合。 绝缘型纺丝纤维可以是第一质量处女,后工业废料流或消费后废物流纤维。 基底由非常稀的成分的水性分散体湿法形成到网状成网上,如在长网造纸机上。 由于绝缘型纺丝纤维的尺寸,形态和取向:可以从充分稀释的悬浮液形成非常低密度的湿垫。 低密度和高度多孔的基材是高吸收性的,具有降低噪音系数,约0.80或更高的NRC值。