Pulp production method that facilitates the nano-miniaturization of pulp by the defibration method using high-pressure water flow

摘要

To provide a pulp production method, enabling easy nano-size fining of a pulp by an operable fibrillation using a high pressure water current, while it has been known that in a nano-size fining of a pulp by fibrillation using a high pressure water current, higher Kappa number value of a raw material pulp makes nano-size fining easier, however, production of a pulp under a digestion condition of obtaining a pulp having high Kappa number causes mass formation of undigested knot scum, thereby having been unable to actual operation.SOLUTION: In a production method of a high-Kappa number pulp which makes nano-size fining easy by fibrillation of a pulp using high pressure water current, a digestion condition to achieve a knot rate of 8% or under is obtained from the relation with the H factor. The pulp obtained by this digestion condition is found to be easy to be nano-size-fined in the nano-size fining by fibrillation using a high pressure water current.SELECTED DRAWING: Figure 23