| US 7,406,755 B2 | ||
| Hydroentanglement of continuous polymer filaments | ||
| Michael Putnam, Fuquay-Varina, N.C. (US); Richard Ferencz, Isle of Palms, S.C. (US); Marlene Storzer, Cornelius, N.C. (US); and Jian Weng, Charlotte, N.C. (US) | ||
| Assigned to Polymer Group, Inc., Charlotte, N.C. (US) | ||
| Filed on Apr. 07, 2005, as Appl. No. 11/101,817. | ||
| Application 11/101817 is a division of application No. 09/475544, filed on Dec. 30, 1999, granted, now 6,903,034. | ||
| Application 09/475544 is a continuation in part of application No. 09/287673, filed on Apr. 07, 1999, granted, now 7,091,140. | ||
| Prior Publication US 2005/0202744 A1, Sep. 15, 2005 | ||
| Int. Cl. D04H 3/10 (2006.01) | ||
| U.S. Cl. 28—104 [28/167; 156/148] | 20 Claims |
| 20. A method of making hydroentangled nonwoven fabric of continuous filaments, comprising the steps of:
a) superimposing at least a first and a second layer of continuous filament spunbond fabrics, said fabrics bonded by thermal
point bonds, said fabrics comprising polyester filaments of about 0.2 to 3.0 denier, said layers each having a basis weight
of between about 15 to 100 g/m2, supporting said layers on a three-dimensional image transfer device to form an unbonded laminate;
b) subjecting a first side of said laminate to fine water jets operating at a pressure of at least 1,500 psi, subjecting a
second side of said laminate to fine water jets operating at a pressure of at least 3,000 psi, said water jets causing disruption
of substantially all of said thermal point bonds and causing the filaments of said at least two layers to become entangled
and to form a coherent final fabric having a basis weight of between about 50 to 600 g/m2, said coherent final fabric characterized by an arrangement of packed loops and spirals subsequently free of filament breakage
and knotting; and
jet dyeing said final coherent fabric.
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