Ultra-fine fibers and method for making same

Details Ultra-fine fibers and method for making same Ultra-fine fibers and method for making same

1977-01-11

1981-07-14

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

With step of cooling to a temperature of zero degrees c. or...

264140, B29B 102

Patent

active

042786231

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.

REFERENCES:
patent: 2307371 (1943-01-01), Hileman
American College Dictionary, Random House, N.Y. 1970, p. 242, "comminute".

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