Title:
【発明の名称】印刷用紙原料、その製造方法ならびに印刷用紙
Document Type and Number:
Japanese Patent JP2003518207
Kind Code:
A
Abstract:
The object of the present invention is a method for making mechanical pulp, such as thermomechanical or chemi-thermomechanical stock. The mechanical pulp is used as a raw material for printing paper, and its freeness value is 30-70 ml CSF. The stock refined by the method is screened in several stages to form accept and reject stock portions. The wood raw material is refined at the first stage of refining at a superatmospheric pressure of over 400 kPa to form a stock that has a freeness value of 250-700 ml CSF.
Inventors:
Thien Wieri, Tyist
Gummels, Maluk
Gummels, Maluk
Application Number:
JP2001547002A
Publication Date:
June 03, 2003
Filing Date:
December 01, 2000
Export Citation:
Assignee:
UPM-Kimmene Corporation
International Classes:
D21C3/22; D21B1/12; D21D5/02; (IPC1-7): D21C3/22; D21D5/02
Domestic Patent References:
| JPH0598596A | 1993-04-20 | |||
| JPS4892601A | 1973-12-01 | |||
| JPS60181389A | 1985-09-17 | |||
| JPS59173395A | 1984-10-01 | |||
| JPS35201B1 |
Attorney, Agent or Firm:
Takao Katori