Hollingsworth & Vose Company

William S Freeman

John A Wertz

Stephen T Cox

David T Healey

Abdoulaye Doucouré

Mark Rowlands

John L Manns

Bruce Smith

Nagendra Anantharamaiah

Mark S Millar

Abdoulaye Doucoure

Fine fiber products including fiber webs, as well as related assemblies, systems and methods, are described. In some embodiments, fiber webs described herein may include fine fibers and relatively low amounts of degraded polymer formed during a fiber extrusion process. The fiber webs may be used for filter media applications.

Fine fiber filter media and processes

Polymer compositions that may be used to form fibers for a fiber web are generally described. In some embodiments, certain properties of the polymer compositions (e.g., molecular weight distribution, melt flow index, melt elasticity, and/or melt toughness) may allow the formation of fiber webs having fine fibers and a relatively low amount of process defects. In some instances, these properties of the polymer composition may be achieved by combining two or more polymer components. Fiber webs formed using the polymer composition may have increased performance and/or better structural characteristics compared to fibers webs formed using a single polymer component.

Filter media including polymer compositions and blends

Filter media, as well as related assemblies, systems and methods. Filter media may contain one or more layers formed of a meltblown material.

Meltblown filter medium, related applications and uses

Meltblown filter medium

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Roanoke, VA, United States of America

William S Freeman