Superfine microfiber nonwoven web
AssigneeKimberly-Clark Worldwide, Inc.
InventorRichard Daniel Pike
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Abstract
The present invention provides a web containing superfine microfibers. The web contains a blend of a first group of split microfibers which contains a first polymer component and a second group of split microfibers which contains a second polymer component, wherein at least one of the polymer components is hydrophilic. The invention additionally provides a meltblown fiber web having at least two groups of fibers, wherein each group of the fibers has a distinct cross-sectional configuration.
Claims17
A microfiber web comprising split fibers of meltblown fibers, said split fiber web comprising first fibers of a first polymeric composition and second fibers of a second polymeric composition wherein said first and second polymer compositions are incompatible with one another and further wherein said first polymeric composition is at least temporarily hydrophilic.
A microfiber web comprising a blend of a first group of split microfibers which comprise a first polymer and a second group of split microfibers which comprise a second polymer, wherein the first fibers are hydrophilic.
A process for producing split superfine meltblown fiber web, which process comprises:
- a) providing a splittable meltblown fiber web, said fiber web comprising meltblown conjugate fibers, said meltblown conjugate fibers comprising a first polymer and a second polymer, wherein the first and second polymers occupy distinct segments across the cross-section and extending along the length of the fibers, said first polymer is incompatible with said second polymer and at least one of said first and second polymers is hydrophilic;
- and
- b) contacting said meltblown fiber web with a hot aqueous split-inducing medium to split said conjugate fibers of said web.
Dependencies are inferred from the claim text.