Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1997-12-31
2000-07-18
McCamish, Marion
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
442366, 442409, B32B 524
Patent
active
060904720
ABSTRACT:
A nonwoven, porous fabric produced from a water modifiable polyolefin-containing film. In a preferred embodiment, the nonwoven fabric includes groups of elongated polyolefin fibers substantially oriented along a longitudinal axis. The fibers have branches extending from themselves and are bonded therebetween. Elongated channels extend generally parallel to the longitudinal axis on the surface of the fabric and within the fabric. A substantial portion of the channels are interconnected to other channels. To produce the fabric, a polymer blend is formed with the polyethylene as the minority constituent and the dispersed phase, and with polyethylene oxide as the continuous phase. In another embodiment wherein the polyethylene is the majority constituent and the polyethylene oxide is the minority constituent, a reactive blend is prepared during processing so that the blend exhibits an inverse phase morphology, the polyethylene oxide becoming the continuous phase and the polyethylene becoming the dispersed phase. In either embodiment, the blend is extruded into a film, which is then treated with an aqueous solvent to remove the polyethylene oxide to produce the nonwoven, porous fabric. The resulting nonwoven, porous fabric has a silk-like hand and shine ideal for disposable personal hygiene articles, and is flushable through waste water disposal systems.
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Schertz David M.
Wang James H.
Kimberly--Clark Worldwide, Inc.
McCamish Marion
Singh Arti
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