Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Reexamination Certificate
2011-07-05
2011-07-05
O'Hern, Brent T (Department: 1783)
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
C139S38300A, C156S164000, C156S194000, C156S304600, C428S107000, C428S213000, C428S364000, C442S135000
Reexamination Certificate
active
07972679
ABSTRACT:
A ballistic-resistant molded article having a sandwich-type structure including two outer portions of a first high modulus material surrounding an inner portion of a second high modulus material. The outer portions are comprised of a plurality of interleaved layers of adhesive coated cross-plied non-fibrous ultra high molecular weight polyethylene tape. The inner portion is comprised of a plurality of interleaved layers of high modulus cross-plied fibers embedded in resin. The stack of interleaved layers is compressed at high temperature and pressure to form a hybrid sandwich ballistic-resistant molded article that includes a mix of high modulus materials. It has been found that ballistic resistance is higher for the hybrid structure than for a monolithic structure of comparable areal density.
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Harding Kenneth C.
Johnson Erik
Lyons Fielder Stanton
Mears Jeffrey A.
Mitchell Joseph
BAE Systems Tensylon H.P.M., Inc.
O'Hern Brent T
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