Blood filter material

Details Blood filter material Blood filter material

1993-02-25

1994-03-01

Dawson, Robert A.

Liquid purification or separation

Filter

Material

210504, 210505, 210508, 210509, 428283, 428285, 428286, 428287, 428323, 428327, B01D 3902, B01D 3904, B01D 3906, B01D 3908

Patent

active

052904490

ABSTRACT:
A filter material for filtering leucocytes from a fraction of or whole human blood, comprises a textile web having a thickness of between about 2 millimeters to about 12 millimeters and a bulk density of about 0.05 to 0.4 g/cm.sup.3. The web has a plurality of interlocked textile fibers with average deniers between about 0.05 and 0.75 and average lengths between about 3 millimeters and 15 millimeters. The textile fibers are distributed in the web to form a matrix thereof with spaces between adjacent interstices of interlocked fibers. A plurality of fibrillated particles of textile fiber material, having a surface area of between 5 and 100 square meters per gram are disposed within the spaces of the matrix. The weight ratio of the fibrillated particles to the textile fibers is between about 1:99 and 40:60. A plurality of glass fibers, having an average diameter of between 0.1 and 5 microns and being about 2% to 85% of the web, also form part of the matrix. A thermoplastic binder is disposed at least at cross-over portions of the matrix textile fibers and matrix glass fibers, with the amount of the binder being about 0.1% to 20% by weight of the web.

REFERENCES:
patent: 4274914 (1981-06-01), Keith et al.
patent: 4889764 (1989-12-01), Chenoweth et al.
patent: 4904343 (1990-02-01), Giglia et al.
patent: 5190657 (1993-03-01), Heagle et al.

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