COMPOSITE THERMOPLASTIC/GLASS FILAMENT REINFORCEMENT FOR BUOYANT SUBMARINE CABLES RG-372 (XN-1)/U AND RG-373 (XN-1)/U.
Interim development rept. no. 2, 10 Jun-10 Sep 66.
UNION CARBIDE CORP BOUND BROOK N J PLASTICS DIV
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Conclusions Polymers of the polyurethane family have the best property combinations of all thermoplastic resins tested to date. High strength glasspolyurethane composites can be produced which have remarkable flexibility, very good flex-life - they resist internal abrasion - coupled with outstanding abrasion resistance. 2 An 18-20 thermoplastic80 glass weight ratio appears to be the optimum composite formula. Twenty per cent polyurethane affords good protection and distributes stresses well enough to obtain a high strength tensile member. 3 HTS-901-S-12 type roving gives consistently better results - higher strength, better abrasion resistance etc. - than HTS-903-S-12 roving. The difference between the two glasses is found in their sizing and coupling agents which are applied during manufacture. The 901 type glass roving is designed to be epoxy compatible while the 903 type is silicone compatible. 4 No additives investigated to date significantly upgrade the physical properties of glasspolyurethane composites. 5 Comparing single strand tensile data with data obtained from 5 strands which were cabled or twisted the strength of the cabled strands is only 80 of the mathematical strength obtained by multiplying the single strand strength five times.
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