Armoring of Synthetic-Fiber Deep-Sea Mooring Lines Against Fishbite
WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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Laboratory apparatus which stimulates the biting action of sharks has been designed and constructed, for the screening of candidate plastic materials. Baited samples were exposed to live sharks in both natural and captive environments. The most promising materials, such as polycarbonates and rigid polyvinyl chlorides, are hard and tough, yet flexible enough to spool on a reel of reasonable dimensions. Laboratory tests show that polycarbonate is capable of entrapping a tooth tip and causing it to fracture. Problems of embrittlement by low temperatures and by chemical attack remain to be solved. It has been shown that for maximum effectiveness, the armor must be kept free of tensile stress.
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