Preparation of Maple Wood for CTMP Production

Abstract

There is provided a method of preparing chemithermomechanical CTMP from maple wood, said method comprising the steps of: a) providing maple wood chips having an average length below 20 mm, such as below 19 mm; b) washing the maple wood chips with water; c) steaming the washed maple wood chips for a period of at least 15 minutes to obtain pre-steamed chips; d) impregnating the pre-steamed chips to obtain impregnated chips; e) heating the impregnated chips to obtain pre-treated chips; and f) defibration of the pre-treated chips.

Dependencies are inferred from the claim text.