Method of making a web which is extensible in at least one direction

A method of forming bicomponent fibers into a web is disclosed. The method includes the steps of co-extruding a first component and a second component. The first component has a recovery percentage R 1 and the second component has a recovery percentage R 2 , wherein R 1 is higher than R 2 The first...

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Bibliographische Detailangaben
Hauptverfasser: Topolkaraev, Vasily, Shawver, Susan, Wideman, Gregory, Graham, Matthew
Format: Patent
Sprache:eng
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Zusammenfassung:A method of forming bicomponent fibers into a web is disclosed. The method includes the steps of co-extruding a first component and a second component. The first component has a recovery percentage R 1 and the second component has a recovery percentage R 2 , wherein R 1 is higher than R 2 The first and second components are directed through a spin pack to form a plurality of continuous, molten fibers. The plurality of molten fibers is then routed through a quenching chamber to form a plurality of continuous cooled fibers. The plurality of continuous cooled fibers is then routed through a drawing unit to form a plurality of continuous, solid linear fibers. The linear fibers are then deposited onto a moving support, such as a forming wire, to form an accumulation of fibers. The accumulation of fibers are stabilized and bonded to form a web. The web is then stretched by at least 50 percent in at least one direction before being allowed to relax. The relaxation of the web causes the fibers to acquire a 3-dimensional, coiled configuration which provides the web with extensibility in at least one direction.