Appeal 2007-0098
Application 10/169,909
layered nonwoven fabric may be subsequently strengthened by means of
heat (e.g., hot air, calendaring (heated rollers) or infrared radiation) and
hydrodynamic needling (hydraulic entangling). See the Specification, 3
Further details of the appealed subject matter are recited in claims 13,
14, and 21, which are reproduced below:
13. Multi-layered composite non-woven fabric comprising two outer
layers, which are formed in accordance with an air-lay method from
fusion adhesives fibres [sic, fibers], which are from 8 to 10 mm
maximum in length, between which layers is laid a further layer made
of super-absorbent pulp, which is also produced according to the air-
lay method, wherein this composite non-woven fabric, which is
formed solely according to the air-lay method, is strengthened by
means of the hydrodynamic needling.
14. A process for compaction of a nonwoven, comprising:
continuously forming a multilayered nonwoven fabric by an
air-lay process, comprising:
air-laying a bottom layer comprising thermally activatable
staple fibers;
air-laying cellulose fibers over the bottom layer; and
air-laying a top layer comprising thermally activatable staple
fibers over the cellulose fibers; and
hydrodynamic needling for compaction and
intimate connection of the fibers.
21. A nonwoven made by the process according to claim 14.
2
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