| 摘要 |
<p>A laminate structure (4) for acoustical applications has a porous, flexible, nonwoven, needle punched mat (6) of inherently non-burning, fine glass or other mineral fibers laminated as a facing to a sound absorbing, flame retardant, flexible backing (5) comprising a layer of open cell foam or a mat of glass or mineral fibers, an optional reinforcing layer (7) for the mat (6), of fire retardant fibers in the form of scrim, woven or nonwoven material, being located between the mat (6) and backing (5). Depending upon the materials used the mat (6) and backing (5) may be joined together by: needle punching and subsequent chemical bonding; chemical bonding; flame bonding; and, when an open cell foam backing (5) is used, this may be foamed in place on the facing. <IMAGE></p> |
