Title:
板紙の製造方法
Document Type and Number:
Japanese Patent JP5621082
Kind Code:
B2
Abstract:
A method of producing a paper board comprising: a pulping step of disintegrating and beating fibers from a pulp raw material containing waste paper as a main raw material to obtain pulping process water; a stock preparation step of adding an additive containing a paper strength additive to the obtained pulping process water to obtain a prepared pulp raw material; and a paper-making step of making the obtained prepared pulp raw material into a paper board, wherein the paper board is produced by adding (a) an aqueous solution of hypochlorite and (b) an aqueous solution of water-soluble inorganic ammonium salt or ammonia water to the pulping process water to reduce the amount of the paper strength additive added in the stock preparation step.
Inventors:
池下 孝人
渕野 優治
下本 英明
長谷川 寛
渕野 優治
下本 英明
長谷川 寛
Application Number:
JP2013548124A
Publication Date:
November 05, 2014
Filing Date:
June 24, 2013
Export Citation:
Assignee:
株式会社片山化学工業研究所
ナルコジャパン合同会社
ナルコジャパン合同会社
International Classes:
D21C5/02
Domestic Patent References:
| JP2010100945A | 2010-05-06 | |||
| JP2005290617A | 2005-10-20 | |||
| JP2003105692A | 2003-04-09 | |||
| JP2010084285A | 2010-04-15 | |||
| JP2008043836A | 2008-02-28 |
Attorney, Agent or Firm:
Shintaro Nogawa
Worth Shinji
Hirosuke Kaneko
Kiyoshi Inemoto
Worth Shinji
Hirosuke Kaneko
Kiyoshi Inemoto