Method of making cylindrical fibrous filter structures

Details Method of making cylindrical fibrous filter structures Method of making cylindrical fibrous filter structures

1984-01-06

1986-06-10

Ball, Michael

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

Utilizing centrifugal force or rotating forming zone

264 12, 264 14, 264173, 264176F, 2642092, B01D 2900

Patent

active

045942021

ABSTRACT:
Cylindrical fibrous structures comprising a fibrous mass of nonwoven, synthetic, polymeric microfibers wherein the microfibers are substantially free of fiber-to-fiber bonding and secured to each other by mechanical entanglement of intertwining, the fiber structure having a substantially constant voids volume over at least a substantial portion of the structure and, preferably, a graded fiber diameter structure, both as measured in the radial direction. The structures are particularly useful as depth filters.
The process for preparing such fibrous structures comprises the steps of:

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