Title:
リヨセルパルプのための間伐材及び他の低比重材の使用
Document Type and Number:
Japanese Patent JP4015109
Kind Code:
B2
Abstract:
The use of low specific gravity wood from thinning operations, for example, will produce a lower brownstock viscosity for a given kappa number target. A differential of 200-cP falling ball pulp viscosity has been detected from Kraft cooks of low and high specific gravity wood. Using low specific gravity wood can reduce the bleach stage temperature and the chemical dose needed in the bleach plant to produce lyocell pulp specifications. Low specific gravity wood also increases the ability to reduce pulp viscosity to very low levels without increasing the copper number of the pulp or the concentration of carbonyl in the pulp above acceptable levels.
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Inventors:
James E. Seeley
W Harvey Persinger, Junior
Kent Robage
Meng Kui Luo
W Harvey Persinger, Junior
Kent Robage
Meng Kui Luo
Application Number:
JP2003433853A
Publication Date:
November 28, 2007
Filing Date:
December 26, 2003
Export Citation:
Assignee:
WEYERHAEUSER COMPANY
International Classes:
D04H1/26; D21H11/04; C08B1/00; D01D5/098; D01D5/18; D01F2/00; D21C3/02; D21C9/00; D21C9/10; D21H13/00
Domestic Patent References:
| JP2002506931A | ||||
| JP7102079A | ||||
| JP10158925A | ||||
| JP11508332A | ||||
| JP2001501260A | ||||
| JP2004211281A | ||||
| JP2004211283A | ||||
| JP2004211282A | ||||
| JP2003533602A | ||||
| JP3965154B2 | ||||
| JP3965153B2 |
Attorney, Agent or Firm:
Kazuo Shamoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Tatsuo Tomizu
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Tatsuo Tomizu