Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – With crimping or crinkling of strands of filaments
Patent
1992-08-21
1995-01-17
Bell, James J.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
With crimping or crinkling of strands of filaments
28104, 156290, 1563082, 264171, 2642105, 2642108, 26421117, 428198, 428296, 428299, 428373, D01D 522
Patent
active
053824008
ABSTRACT:
A process for making nonwoven fabric including the steps of meltspinning continuous multicomponent polymeric filaments, drawing the multicomponent filaments, at least partially quenching the multicomponent filaments so that the multicomponents have latent helical crimp, activating the latent helical crimp, and thereafter, forming the crimped continuous multicomponent filaments into a first nonwoven fabric web. By crimping the filaments before the web formation, shrinkage of the web after formation is substantially reduced and the resulting fabric is substantially stable and uniform. In addition, the resulting fabric can have a relatively high loft. The crimp activating step can include heating the multicomponent filaments and preferably includes drawing the multicomponent filaments with a flow of heated air to activate the latent helical crimp. The resulting fabric can form relatively high loft materials useful as a fluid management layer for personal care absorbent articles or can form cloth-like fabric useful as cover materials and garment material. In addition, a nonwoven fabric comprising continuous single and multicomponent filaments and process for making same are provided. Still further, a multilayer nonwoven fabric with continuous multicomponent filaments and process for making same are provided. The degree of crimp in the filaments can be varied from layer to layer to produce composite webs with particular fluid handling properties.
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"Thermobonding Fibers for Nonwovens"-by S. Tomioka-Nonwovens Industry, May 1981, pp. 23-24, 30-31.
Brown Kurtis L.
Gwaltney Sharon W.
Herschberger Thomas A.
Pike Richard D.
Siegel Scott D.
Bell James J.
Herrick William D.
Kimberly-Clark Corporation
Lee Michael U.
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