Absorbent article containing a nonwoven web formed from a porous polyolefin fibers
AssigneeKimberly-Clark Worldwide, Inc.
InventorsVasily A. Topolkaraev, Ryan J. McEneany, Antonio J. Carrillo, Mark M. Mleziva, Andy J. Meyer
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Abstract
An absorbent article containing a nonwoven web that includes a plurality of polyolefin fibers is provided. The polyolefin fibers are formed by a thermoplastic composition containing a continuous phase that includes a polyolefin matrix polymer and nanoinclusion additive is provided. The nanoinclusion additive is dispersed within the continuous phase as discrete nano-scale phase domains. When drawn, the nano-scale phase domains are able to interact with the matrix in a unique manner to create a network of nanopores.
Claims29
An absorbent article that contains an absorbent member positioned between a backsheet and topsheet, wherein the absorbent article comprises a nonwoven web that includes a plurality of fibers formed from a thermoplastic composition that contains a continuous phase that includes a polyolefin matrix polymer and a polymeric nanoinclusion additive and a polymeric microinclusion additive dispersed within the continuous phase in the form of discrete domains,
- wherein the polymeric nanoinclusion additive is in the form of nano-scale domains and the polymeric microinclusion additive is in the form of micro-scale domains,
- wherein a porous network is defined in the composition that includes a plurality of nanopores adjacent to the nano-scale domains and/or the micro-scale domains, the nanopores having an average cross-sectional dimension of about 800 nanometers or less.
Dependencies are inferred from the claim text.