Title:
【発明の名称】CTMPプロセス
Document Type and Number:
Japanese Patent JP2915576
Kind Code:
B2
Abstract:
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 below 10% and a shive content below 3. The method for producing the pulp comprises the steps of impregnating, preheating, defibering, and washing the material. The impregnation and preheating of the chips are effected in one and the same vessel over a combined time period of a 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° C., suitably at least 130° C. and preferably having essentially the same temperature as in the preheating process; and preheating the chips at a temperature of 150-175°C., preferably 160-170° C. Defibering is carried out with an energy input which is at most half of the energy input required for defibering when the preheating and defibering are carried out at 135° C.
Inventors:
HEGURUNDO HANSU
BETSUKU ROORANDO
DANIERUSON OOBE
FUARUKU BOO
BETSUKU ROORANDO
DANIERUSON OOBE
FUARUKU BOO
Application Number:
JP50408391A
Publication Date:
July 05, 1999
Filing Date:
February 11, 1991
Export Citation:
Assignee:
MEERUNRITSUKE AB
International Classes:
B27N1/00; D21B1/02; D21C3/24; D21B1/16; D21C9/16; D21H11/00; D21H11/02; (IPC1-7): D21C3/24; D21H11/00
Domestic Patent References:
| JP5915589A | ||||
| JP52124902A |
Attorney, Agent or Firm:
Yoshio Kawaguchi (2 outside)