| US 7,467,446 B2 | ||
| System and method for reducing jet streaks in hydroentangled fibers | ||
| Behnam Pourdeyhimi, Cary, N.C. (US); Hooman Vahedi Tafreshi, Raleigh, N.C. (US); and Nagendra Anantharamaiah, Raleigh, N.C. (US) | ||
| Assigned to North Carolina State University, Raleigh, N.C. (US) | ||
| Filed on Mar. 28, 2007, as Appl. No. 11/692,680. | ||
| Claims priority of provisional application 60/786541, filed on Mar. 28, 2006. | ||
| Prior Publication US 2007/0226970 A1, Oct. 04, 2007 | ||
| Int. Cl. D04H 1/46 (2006.01) | ||
| U.S. Cl. 28—104 [28/167] | 35 Claims |
| 35. A system for hydroentangling a sheet of fabric material moving in a processing direction to form a nonwoven fabric, the
system comprising an elongate hydroentangling jet strip comprising a plurality of nozzle orifices, each operatively positioned
to direct a stream of hydroentangling fluid toward the sheet of fabric material, the plurality of nozzle orifices comprising:
a first row of nozzle orifices spaced apart along the width of the elongate hydroentangling jet strip, each of the nozzle
orifices in the first row having a first diameter;
a second row of nozzle orifices disposed downstream from the first row of nozzle orifices in the processing direction and
spaced apart along the width of the elongate hydroentangling jet strip, the second row of nozzle orifices being offset at
a selected distance from the first row of nozzle orifices along the width of the elongate hydroentangling jet strip, each
of the nozzle orifices in the second row having a second diameter being smaller than the first diameter; and
wherein the second row of nozzle orifices are offset at the selected distance from the first plurality of orifices such that
a center of each of the second row of nozzle orifices is substantially equidistant from a center of each of a pair of nozzle
orifices of the first row positioned closest to each of the second row of nozzle orifices.
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