Fabric having reduced air permeability
AssigneeAlliedSignal Inc.
InventorsJames J. Dunbar, Chok B. Tan, Gene C. Weedon, Thomas Y. Tam, Alfred L. Cutrone, Elizabeth S. Bledsoe
Life of this patent
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Abstract
An article including a woven fabric for impeding the passage of air, the fabric having an air permeability of less than about 15 cfm/ft.sup.2 and including at least one multifilament yarn having a longitudinal axis, the yarn being made of high strength filaments having a tenacity of at least about 7 g/d, a tensile modulus of at least about 150 g/d and an energy-to-break of at least about 8 J/g. Preferably, the high strength filaments are extended chain polyethylene.
Claims14
An article including a woven fabric for impeding the passage of air, the fabric having an air permeability of less than about 15 cfm/ft.sup.2 and including at least one multifilament yarn having a longitudinal axis, the yarn comprising at least one type of high strength filament selected from the group consisting of extended chain polyethylene filament, extended chain polypropylene filament, polyvinyl alcohol filament, polyacrylonitrile filament, liquid crystal filament, glass filament and carbon filament, said high strength filament filaments having a tenacity of at least about 7 g/d, a tensile modulus of at least about 150 g/d and an energy-to-break of at least about 8 J/g, wherein the yarn includes a plurality of sections at which the individual filaments are entangled together to form entanglements and a plurality of sections wherein the individual filaments are substantially parallel to the longitudinal axis of the yarn.
Dependencies are inferred from the claim text.