| 摘要 |
An absorbent, chemithermomechanical pulp produced from lignocellulosic material with a wood yield above 88%, a low resin content < 0.15 %, a long fibre content above 70 %, a short fibre content b elow 10 % and a shive content below 3%. A method for producing the pulp. The method comprises the steps of impregnating, preheating, defibring, and washing the material. The impregnation and preheating of the chips are effected in one and the same ve ssel over a combined time period of at most 2 minutes, particularly at most 1 minute, preferably at most 0,5 minutes; using a warm impregnating liquid having a temperature of at least 100.degree.C, suitable at least 130.degree.C and preferably having esse ntially the same temperature as in the preheating process; and preheating the chips at a temperature of 150-175.degree.C, preferably 160-170.de gree.C. Defibering is carried out with an energy input which is at most half of the the energy input required for defibering when the preheat ing and defibering are carried out at 135.degree.C.
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