Patent ID: 7745000

Claim:
A plexifilamentary structure formed by flash spinning a spin mixture comprising a polymer blend of: 5 to 30 percent by weight of a functionalized polymer and 70 to 95 percent by weight of an additional polymer; wherein the functionalized polymer is selected from the group consisting of polyolefins, copolymers thereof with ethylenically unsaturated monomers, polyesters, and mixtures thereof, said polymer comprising 1 to 25 mol % of functional groups; wherein the additional polymer is selected from the group consisting of polyolefins, copolymers thereof with ethylenically unsaturated monomers, polyesters, and mixtures thereof; wherein said functional groups form non-fugitive surface modifications on said plexifilamentary structure and said surface modifications exist at an enriched concentration as compared to the bulk concentration of said functional groups.