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    CELLULOSE-BASE FIBROUS MATERIAL
    2.
    发明公开
    CELLULOSE-BASE FIBROUS MATERIAL 有权
    基于自由基AUF基础纤维素

    公开(公告)号：EP2014828A1

    公开(公告)日：2009-01-14

    申请号：EP07742185.7

    申请日：2007-04-23

    申请人： Nippon Paper Industries CO., LTD.

    发明人： GOTO, Shisei ,  NODA, Takaharu ,  YUZAWA, Chie ,  IIMORI, Takeshi

    IPC分类号： D21D1/20 ,  D21H11/16

    CPC分类号： D21H11/16 ,  D21H15/02 ,  D21H21/18

    摘要： The present invention aims to provide cellulose-based fibrous materials for obtaining papers and sheets having low density, high surface quality, good dimensional stability despite of high strength, and high opacity. Cellulose-based fibrous materials having external fibrils consisting of an assembly of scale-like microfibrils exhibit a higher fiber stiffness, a lower water retention value and a higher specific surface area as compared with fibrous materials having filamentous external fibrils at the same freeness. Papers and sheets having low density, high surface quality, good dimensional stability and high opacity can be obtained by using such fibrous materials.

    摘要翻译： 本发明的目的在于提供纤维素类纤维材料，用于获得低密度，高表面质量，良好的尺寸稳定性，尽管强度高，不透明度高的纸张和片材。 与具有相同游离度的丝状外部纤维的纤维材料相比，具有由鳞状微原纤维组合构成的外部纤维的纤维素基纤维材料表现出较高的纤维刚度，较低的保水值和较高的比表面积。 通过使用这种纤维材料可以获得具有低密度，高表面质量，良好尺寸稳定性和高不透明度的纸和片材。

    METHOD OF DEINKING WASTE PRINTED PAPER
    4.
    发明公开
    METHOD OF DEINKING WASTE PRINTED PAPER 有权
    METHOD FOR脱墨印刷废纸

    公开(公告)号：EP2135991A1

    公开(公告)日：2009-12-23

    申请号：EP08722607.2

    申请日：2008-03-21

    申请人： Nippon Paper Industries Co., Ltd.

    发明人： YUZAWA, Chie ,  IWABUCHI, Hisashi ,  KAMIJO, Yasuyuki ,  GOTO, Shisei ,  IIMORI, Takeshi

    IPC分类号： D21C5/02

    CPC分类号： D21C5/025 ,  Y02W30/648

    摘要： The object of the present invention is to provide a process for producing deinked pulp from recovered paper containing stickies while preventing excessive reduction in the size of stickies, lowering the COD of effluents, and producing deinked pulp with a smaller residual ink content.
    In the ink detachment stage of the process for producing deinked pulp from recovered paper containing stickies, an anhydride of crystalline layered silicate is added, preferably in an amount of 0.1-1.5 weight% of absolute-dry pulp, and a deinking treatment is performed at a pH of 7.0-9.9. In the present invention, the deinking treatment is performed in a weakly alkaline to neutral region which is generally said to be effective in reducing the amount of stickies but less effective in ink detachment and, yet, deinked pulp having a smaller amount of residual ink can be produced.