公开(公告)号：EP0579447B1

公开(公告)日：1998-04-08

申请号：EP93305330.8

申请日：1993-07-07

申请人： NIPPON PAPER INDUSTRIES CO., LTD.

发明人： Kuroyama, Yoshihiro ,  Inoue, Yoshiyuki ,  Ishikawa, Susumu ,  Iimori, Yoshifumi

IPC分类号： D21H21/16 ,  G03G7/00

CPC分类号： D21H21/16 ,  Y10T428/24934 ,  Y10T428/31848 ,  Y10T428/31993 ,  Y10T428/31996

公开(公告)号：EP0579447A1

公开(公告)日：1994-01-19

申请号：EP93305330.8

申请日：1993-07-07

申请人： NIPPON PAPER INDUSTRIES CO., LTD.

发明人： Kuroyama, Yoshihiro ,  Inoue, Yoshiyuki ,  Ishikawa, Susumu ,  Iimori, Yoshifumi

IPC分类号： D21H21/16 ,  G03G7/00

CPC分类号： D21H21/16 ,  Y10T428/24934 ,  Y10T428/31848 ,  Y10T428/31993 ,  Y10T428/31996

摘要： A permanent paper is disclosed which employs as a stock pulp slurry containing at least one kind of filler, and aluminum sulfate, a hydrophobic modified rosin emulsion sizing agent and a water-soluble alkaline salt, wherein the pH where said filler is dispersed in water to form 10% of a dispersion is 4 - 8, the pH of said pulp slurry is controlled within 6.5 - 7.5 and an alkaline salt of an acid having a pKa of 5 - 14 at a 25°C aqueous solution is coated onto said paper and the pH of the coated paper extract in cold water is 7.5 - 9.0.

摘要翻译： 公开了一种使用含有至少一种填料的浆料浆料和硫酸铝，疏水改性松香乳液上浆剂和水溶性碱性盐的永久性纸，其中所述填料分散在水中的pH 形成10％的分散体为4-8，所述纸浆的pH值控制在6.5-7.5之间，并且在25℃水溶液中将pKa为5-14的酸性碱性盐涂覆在所述纸上， 涂布纸提取物在冷水中的pH为7.5〜9.0。