Patent ID: 6048464
Filing Date: 2000-04-11
Classification: A61M,B01D,D04H,Y10S

Abstract:
A leukocyte-removing filter material which is composed of a porous element having an average pore diameter of not less than 1.0 .mu.m but less than 100 .mu.m and a fiber structure having an average fiber diameter of not less than 0.01 .mu.m but less than 1.0 .mu.m kept on the porous element, wherein the porosity of the filter material is not less than 50% but less than 95%, the keeping proportion of the fiber structure to the filter material is not less than 0.01% by weight but less than 30% by weight, and the ratio between the average pore diameter of the porous element and the average fiber diameter of the fiber structure is not less than 2 but less than 2,000 and the fiber structure forms a reticulate structure.