A method and apparatus to enhance fiber development by addition of treatment agent during mechanical pulping

摘要

A mechanical pulping method includes: defibrating a comminuted cellulosic material (20); mechanically refining the defibrated cellulosic material (20) in a primary refining step; introducing to the cellulosic material (20) at least one of a chemical agent (36) and a biological during the defibration step or the mechanical refining step, and producing pulp from the refined and defibrated cellulosic material (20).