| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producing deinked pulp of printed wastepaper, with which the used amount of an alkaline chemical is significantly reduced, the amount of unreleased ink is small, which has low foaming properties and improved operation and improves a pulp yield. <P>SOLUTION: In the method for producing deinked pulp of printed wastepaper, a nonionic surfactant having <100 mm foam height measured at 40°C according to JIS K-3362 is added in an ink releasing process at pH 7-9 except a floatation process. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
