Title:
セルロース繊維の改質方法
Document Type and Number:
Japanese Patent JP4538235
Kind Code:
B2
Abstract:
The invention relates to a method for the modification of cellulose fiber with the object of increasing the strength properties of the pulp. Cellulose derivative, preferably in the form of CMC, is added in association with alkali cooking and/or delignification of cellulose chips in a suspension with treatment fluid, in an amount exceeding 2 kg, preferably at least 5-7 kg, per ton of cellulose fibers. The addition of cellulose derivative to the suspension takes place when the suspension has a concentration of calcium released from the cellulose exceeding 20 mg/l. The conditions required for an efficient deposit of cellulose derivative onto the cellulose fibers can be established in this way, where the natural content of calcium in the wood raw material has been released and contributes to a high ionic strength, while an advantageous high temperature is established. No additional process stages are required and operating costs can be kept low.
Inventors:
Gustavson, Katrin
Snakenes, vydal
Olson, Christer
Snakenes, vydal
Olson, Christer
Application Number:
JP2003578640A
Publication Date:
September 08, 2010
Filing Date:
March 21, 2003
Export Citation:
Assignee:
Metso Fiber Karlstad Activolag
International Classes:
D21C1/00; D21C9/00; D21C3/02
Domestic Patent References:
| JP2002513872A | ||||
| JP56031092A | ||||
| JP61108787A | ||||
| JP9291490A | ||||
| JP2005515311A |
Attorney, Agent or Firm:
Takao Hamano
Teruichi Hirai
Teruichi Hirai