Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Nonwoven fabric – Autogenously bonded nonwoven fabric
Reexamination Certificate
2005-07-12
2005-07-12
Morris, Terrel (Department: 1771)
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Nonwoven fabric
Autogenously bonded nonwoven fabric
C442S334000, C442S335000, C442S336000, C442S340000, C442S361000, C428S195100
Reexamination Certificate
active
06916752
ABSTRACT:
Nonwoven fibrous webs comprise fibers of uniform diameter that vary in morphology along their length. The variation provides longitudinal segments that exhibit distinctive softening characteristics during a bonding operation. Some segments soften under the conditions of the bonding operation and bond to other fibers of the web, and other segments are passive during the bonding operation. Webs as described can be formed by a method that comprises a) extruding filaments of fiber-forming material; b) directing the filaments through a processing chamber in which the filaments are subjected to longitudinal stress; c) subjecting the filaments to turbulent flow conditions after they exit the processing chamber; and d) collecting the processed filaments; the temperature of the filaments being controlled so that at least some of the filaments solidify while in the turbulent field.
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Berrigan Michael R.
De Rovere Anne N.
Fay William T.
Munro Jill R.
Percha Pamela A.
3M Innovative Properties Company
Morris Terrel
Piziali Andrew T
Tamte Roger R.
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