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AssigneeHoneywell International Inc.
InventorsASHOK BHATNAGAR, DAVID A. HURST, CHARLES ARNETT, GARY KRATZER, HENRY GERARD ARDIFF
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A method for improving the translation efficiency of fiber strength into composite strength is provided. A single unidirectional tape, single unidirectional fiber web or a stack of unidirectional web/unidirectional tape plies formed from partially oriented fibers/tapes is primed under mild conditions followed by subjecting the primed plies to an axial extension stress in the axial fiber direction of each fiber ply by passage through a compression apparatus. The axial extension stress extends the fibers, strengthening them, while also compacting the plies together and thereby forming a composite having improved strength. Production yield is improved by avoiding maximal fiber stretching and thereby avoiding typical manufacturing loss, and low weight composite armor having increased strength is achieved.
A fibrous article comprising one or more unidirectional fiber plies, each unidirectional fiber ply comprising a plurality of unidirectionally oriented fibers coated with a polymeric binder, wherein said fibrous article has been primed and wherein the fibers have been axially extended in a compression apparatus, wherein said fibers have an initial elongation-to-break value prior to being axially extended and a reduced elongation-to-break value after being axially extended, wherein the initial elongation-to-break value is greater than the reduced elongation-to-break value, and wherein the reduced elongation-to-break value is from about 2.0% to about 3.9%.
A method for enhancing fiber tensile properties of a fibrous pre-preg composite, the method comprising:
Dependencies are inferred from the claim text.