Hydroentanglement of continuous polymer filaments

Details Hydroentanglement of continuous polymer filaments Hydroentanglement of continuous polymer filaments

2005-04-07

2008-11-25

Tentoni, Leo B (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

With twining, plying, braiding, or textile fabric formation

C028S104000, C028S105000, C264S210200, C264S211140

Reexamination Certificate

active

07455800

ABSTRACT:
A nonwoven fabric comprises continuous polymer filaments of 0.5-3 denier that have been hydroentangled in a complex matrix of interconnecting filament loops, and that is otherwise substantially free of knotting, or of otherwise wrapping about one another. A process for making a non-woven fabric comprises continuously extruding polymer filaments of 0.5-3 denier onto a moving support, pre-entangling the filaments with water jets, and entangling the filaments with a second set of water jets. An apparatus for making a nonwoven fabric comprises means for continuously extruding substantially endless polymer filaments of 0.5-3 denier onto a moving support to form an unbonded web, a pre-entangling station for entangling the web with a plurality of water jets, and a plurality of water jets for final entanglement of the filament web.

REFERENCES:
patent: 4718152 (1988-01-01), Suzuki et al.
patent: 4774110 (1988-09-01), Murakami et al.
patent: 4970104 (1990-11-01), Radwanski
patent: 5240764 (1993-08-01), Haid et al.
patent: 5763041 (1998-06-01), Leak et al.

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