| 摘要 |
PROBLEM TO BE SOLVED: To efficiently obtain a carbon black molding excellent in compacting property and dispersibility by repeating the packing and pressing work of a carbon black plural times. SOLUTION: The carbon black 2 having 0.1-0.2g/cm<3> bulk density is packed into a metallic mold surrounded with a piston 1, a die 3 and lower punch 4, pressed with a piston 1 and further pressed with the lower punch 4 by moving the die 3 downward so that the total pressurizing force becomes 1-250kgf/cm<2> and the carbon black molding having 0.4-1.2g/cm<3> bulk density is obtained by repeating the pressing work 2-10 times. |
