Process for producing leukocyte-removing material and hydrophilized polyolefins
AssigneeAsahi Medical Co., Ltd.
InventorsHirokazu Onodera, Makoto Yoshida
Life of this patent
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Abstract
A leukocyte-removing material composed substantially of a polyolefin, the factor of hydrophilicity of the surface of said leukocyte-removing material being less than 40% and not less than 30%.
Claims31
A porous leukocyte-removing material composed substantially of a polyolefin, the factor of hydrophilicity of the surface of said leukocyte-removing material being less than 40% and not less than 30%, wherein the average pore size of said porous material is less than 100 μm and not less than 1.0 μm, wherein said porous material is a structure made of a non-woven fabric, and which has groups selected from the class consisting of hydroxyl groups and keto groups on the surface, said non-woven fabric weighing at least 15 g/m2 but less than 200 g/m2.
A hydrophilized leukocyte-removing material composed substantially of a polyolefin, characterized by having an excellent biocompatibility and being not changed in hydrophilicity over a long period of time.
A process for producing a hydrophilized polyolefin which comprises a step of irradiating a polyolefin with a radiation in a dose of less than 300 kGy and not less than 15 kGy, and a step of heating said polyolefin at a temperature of lower than 125° C. and not lower than 75° C. after the irradiation with the radiation.
Dependencies are inferred from the claim text.