POROUS POLYOLEFIN FIBERS
A poiyoiefin fiber that is formed by a thermoplastic composition containing a continuous phase that includes a poiyoiefin matrix polymer and nanoinclusion additive is provided. The nanoinclusion additive is dispersed within the continuous phase as discrete nano-scaie phase domains. When drawn, the nano-scaie phase domains are able to interact with the matrix in a unique manner to create a network of nanopores.