Hollow fiber membrane made of an ethylene-vinyl alcohol polymer
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United States of America Patent
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-
Feb 4, 2003
Grant Date -
Aug 23, 2001
app pub date -
Jan 10, 2001
filing date -
Feb 4, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hollow fiber membrane made of an ethylene-vinyl alcohol polymer, comprises a dense layer existing in the inner surface and a porous layer existing in the layer other than the dense layer, wherein the hollow fiber membrane has a porosity of 60 to 90%, an overall mass transfer coefficient for myoglobin in a water-based system of not less than 0.003 cm/min., and a rejection rate for albumin in a bovine blood system of not less than 97%. The EVA hollow fiber membrane is useful for hemopurification membranes such as hemodialysis membranes, hemodiafiltration membranes, hemofiltration membranes and continuous hemofiltration membranes, and a process for producing the same.
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