Method of manufacturing pulp for corrugated medium

摘要

A method to make pulp adapted for forming a corrugated medium, the method includes: cooking chips in a cooking vessel using a caustic carbonated pulping soda/caustic (SC) cooking liquor injected into the cooking vessel; fiberizing the chips discharged from the cooking vessel to form a pulp, and removing lignin from the pulp or oxidizing lignin in the pulp by injecting oxygen (O2) into the fiberized pulp.

主权项

1. A method to make washed pulp comprising:
semi-chemically pulping comminuted cellulosic fibrous material in a cooking vessel using a cooking liquor injected into the cooking vessel; fiberizing the cooked fibrous material discharged from the cooking vessel to form a fiberized pulp for a corrugated medium; removing lignin from the fiberized pulp or oxidizing lignin in the fiberized pulp by injecting oxygen (O2) into the fiberized pulp in an oxygen delignification treatment; washing the fiberized pulp to form the washed pulp; and producing a corrugated medium using the washed pulp; wherein immediately before the fiberized pulp is injected with oxygen (O2) for oxygen delignification treatment, the fiberized pulp has a shives content of between at least 20% to 50%.