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RESEARCH AND DEVELOPMENT OF HIGH TENACITY FIBERS. PART I. POLYOLEFINS.
Quarterly progress rept. no. 4, 1 Jan-1 May 63,
UNITED STATES RUBBER CO WAYNE N J RESEARCH CENTER
Pagination or Media Count:
In repeated diagnostic spinning of Profax 6823 to achieve a marginal improvement in strength, a higher strength of 13.5 gpd was realized. The elongations of these high strength samples from Profax 6823 have been of the order of 18 as compared to 12 for fibers from Profax 6523. The moduli of ttttttthe former fibers, on the other hand, have been observed to be lower. The investigation was not completely successful in realizing greater than 12 gpd in the three pound yarn sample. A lower tenacity of 10 gpd was accepted. The difficulties inherent in spinnings and drawings of long duration were new and a number of explanations and remedies are offered. The high strength capabilities of polypropylene have been well established and further scale up efforts should be fruitful. Author
APPROVED FOR PUBLIC RELEASE