WE CLAIM:
1. A material for removing neutrophils, the material being a knitted fabric or a woven fabric comprising a fiber having a fiber diameter of 10 to 60 pm, wherein the knitted fabric or the woven fabric has a thickness of 0.10 to 0.40 mm and a porosity of 10 to 30%.
2. The material for removing neutrophils, according to claim 1, wherein the knitted fabric or the woven fabric has a bulk density of 0.26 to 0.40 g/cm3.
3. The material for removing neutrophils, according to claim 1 or 2, wherein the knitted fabric or the woven fabric has an amino group content of 0.3 to 1.2 mmol per 1.0 g of dry mass.
4. The material for removing neutrophils, according to claim 1 or 2, wherein the knitted fabric or the woven fabric has an amide group content of 2.0 to 4.0 mmol per 1.0 g of dry mass.
5. The material for removing neutrophils, according to claim 1 or 2, wherein the knitted fabric or the woven fabric contains the fiber as a bundle of 30 to 45 filaments.
6. The material for removing neutrophils, according to claim 1 or 2, wherein the fiber is a sea-island type composite fiber.
7. The material for removing neutrophils, according to claim 6, wherein the sea-island type composite fiber contains polystyrene or a polystyrene derivative as a
sea component, and polypropylene as an island component.
8. A column for removing neutrophils comprising the material for removing neutrophils, according to claim 1 or 2. the material being packed at 0.1 to 0.4 g/cmJ.
9. A method of producing the material for removing neutrophils, according to claim 1 or 2, the method comprising a step of binding a compound to a knitted fabric or a woven fabric containing a fiber having a fiber diameter of 10 to 60 pm while a tension is applied to the fabric such that an elongation rate of 1 to 20% is achieved in the longitudinal direction and/or transverse direction.