A - Human Necessities – 42 – B
Patent
A - Human Necessities
42
B
2/73
A42B 3/04 (2006.01) B29C 70/20 (2006.01) B29C 70/30 (2006.01) B32B 5/00 (2006.01) F41H 5/04 (2006.01)
Patent
CA 1311087
ABSTRACT OF THE DISCLOSURE The present invention is an improved impact resistant composite and helmet made thereof. The helmet comprises an impact resistant composite shell. The composite shell comprises a plurality of prepreg packets. Each prepreg packet comprises at least about 2 and preferably 5 to 20 prepreg layers. There are from 2 to 50 and preferably 5 to 20 prepreg packets. Each prepreg layer comprises a plurality of unidirectional coplanar fibers embedded in a polymeric matrix. The fibers of adjacent layers in the prepreg packets are at an angle of from 45° to 90°, preferably 60° to 90°°, more preferably 80° to 90° and most preferably about 90° from each other. The angle of the fiber in alternate layers is preferably, sustantially the same.
573613
Li Hsin Lang
Prevorsek Dusan Ciril
Allied-Signal Inc.
Gowling Lafleur Henderson Llp
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