Title:
【発明の名称】血液フィルタ及び濾過方法
Document Type and Number:
Japanese Patent JPH07500090
Kind Code:
A
Abstract:
A filter material for filtering leucocytes from a fraction of or whole human blood, comprises a shape-sustaining laid 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/cm3. The web has a plurality of interlocked, staple, 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 substantially uniformly distributed in the web so as to form a matrix of the textile fibers with spaces between adjacent interstices of interlocked fibers. A plurality of fibrillated particles of a polymeric material, e.g. a textile fiber material, having a surface area of between 5 and 60 square meters per gram are substantially disposed within the spaces of the matrix. The fibrillated particles have a plurality of fine fibrils which are interlocked with adjacent textile fibers of the spaces such that the fibrillated particles are not substantially displaced from the web during filtration of the blood. The weight ratio of the fibrillated particles to the textile fibers is between about 1:99 and 40:60.
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Inventors:
HEAGLE DAVID G (US)
HIERS JOHN J (US)
HIERS JOHN J (US)
Application Number:
JP50292893A
Publication Date:
January 05, 1995
Filing Date:
July 16, 1992
Export Citation:
Assignee:
LYDALL INC (US)
International Classes:
A61M1/16; A61K35/14; A61M1/02; B01D37/00; B01D39/08; B01D39/16; (IPC1-7): A61K35/14; A61M1/16; A61M5/165; B01D37/00; B01D39/16
Attorney, Agent or Firm:
Tsutomu Watanabe (1 person outside)