Method for producing blade member

1. A method for producing a blade member to be used for removal of residual toner remaining on a surface of a counterpart member in an electrophotographic image forming device, by sliding contact with the counterpart member, the method comprising:

an impregnation step of impregnating at least a portion of a surface of a blade portion made of a polyurethane rubber with a surface treatment liquid that consists essentially of a salt of diazabicycloundecene and a carbodiimide-modified polyvalent isocyanate compound comprising a carbodiimide-modified polyvalent isocyanate dimer and a carbodiimide-modified polyvalent isocyanate trimer or higher multimer, in which a content of the trimer or higher multimer is 50% by mass or less; and

a cured layer formation step of heating and curing the carbodiimide-modified polyvalent isocyanate compound which is impregnated into the blade portion, to form a cured layer.

2. The method for producing a blade member according to claim 1 , wherein the salt of diazabicycloundecene is one or more selected from a triazole salt of diazabicycloundecene, a phenol salt of diazabicycloundecene and an octylic acid salt of diazabicycloundecene.

3. The method for producing a blade member according to claim 1 , wherein the carbodiimide-modified polyvalent isocyanate compound comprises a polyvalent isocyanate monomer.

4. The method for producing a blade member according to claim 2 , wherein the carbodiimide-modified polyvalent isocyanate compound comprises a polyvalent isocyanate monomer.

5. The method for producing a blade member according to claim 1 , wherein the carbodiimide-modified polyvalent isocyanate is carbodiimide-modified diphenylmethane diisocyanate.

6. The method for producing a blade member according to claim 2 , wherein the carbodiimide-modified polyvalent isocyanate is carbodiimide-modified diphenylmethane diisocyanate.

7. The method for producing a blade member according to claim 3 , wherein the carbodiimide-modified polyvalent isocyanate is carbodiimide-modified diphenylmethane diisocyanate.

8. The method for producing a blade member according to claim 4 , wherein the carbodiimide-modified polyvalent isocyanate is carbodiimide-modified diphenylmethane diisocyanate.

9. The method for producing a blade member according to claim 1 , wherein the surface treatment liquid has a water content of 0.1% by mass or less.

10. The method for producing a blade member according to claim 2 , wherein the surface treatment liquid has a water content of 0.1% by mass or less.

11. The method for producing a blade member according to claim 3 , wherein the surface treatment liquid has a water content of 0.1% by mass or less.

12. The method for producing a blade member according to claim 4 , wherein the surface treatment liquid has a water content of 0.1% by mass or less.

13. The method for producing a blade member according to claim 5 , wherein the surface treatment liquid has a water content of 0.1% by mass or less.

14. The method for producing a blade member according to claim 6 , wherein the surface treatment liquid has a water content of 0.1% by mass or less.

15. The method for producing a blade member according to claim 7 , wherein the surface treatment liquid has a water content of 0.1% by mass or less.

16. The method for producing a blade member according to claim 8 , wherein the surface treatment liquid has a water content of 0.1% by mass or less.

17. The method for producing a blade member according to claim 1 , wherein the surface treatment liquid comprises a solvent.

18. The method for producing a blade member according to claim 2 , wherein the surface treatment liquid comprises a solvent.

19. The method for producing a blade member according to claim 8 , wherein the surface treatment liquid comprises a solvent.

20. The method for producing a blade member according to claim 16 , wherein the surface treatment liquid comprises a solvent.