Ultra-fine fibers and method for making same
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United States of America Patent
Stats
-
Jul 14, 1981
Grant Date -
N/A
app pub date -
Jan 11, 1977
filing date -
Jan 11, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Ultra-fine fibers, having an average diameter typically in the range of 0.1 to 5 micrometers, are provided which are capable of being dispersed in a liquid medium, such as a freeze dry liquid, to form a free-flowing, non-agglomerating slurry which may be employed to coat a substrate, as to provide an intimal lining for a circulatory assist device. Such ultra-fine fibers are prepared by immobilizing longer fibers in a medium, such as ice, and thereafter shearing the medium with the longer fibers embedded therein at a rate and for a time sufficient to comminute the fibers into appropriately short lengths.
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