COMPOSITE THERMOPLASTIC/GLASS FILAMENT REINFORCEMENT FOR BUOYANT SUBMARINE CABLES RG-372 (XN-1)/U AND RG-373 (XN-1)/U.
Abstract
Tentative specifications for the impregnated glass filament include a use temperature range from minus 28C to plus 65C. Preliminary tests indicate that this requirement should pose no problem for 'S' glass roving impregnated with Estane 5701 (polyurethane). As indicated by a decrease in tensile strength, there appears to be an optimum number of ends (in a strand of glass) which can be effectively impregnated. Tensile testing of 40-end roving was made possible by encompassing the ends of the roving in a tab made of 2/3 polyurethane and 1/3 Phenoxy. This prevents the tab from yielding but does not cause stress concentration points. The cross-sectional shape of 20-end roving can be made circular by the use of godet rolls which contain grooves with semi-circular cross-sections equivalent in diameter to that of the impregnated roving. However, the godet grooves alone are not enough to reshape the flattening to which 40-end roving is subjected during drying. Grooves on the turn-around idlers should overcome this so that both the 40 and 20-end roving can be produced with circular cross-sections. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 10, 1967
- Accession Number
- AD0646988
Entities
People
- H. J. Nalepa
- P. H. Hofer