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    PROCESS
    4.
    发明公开
    PROCESS 审中-公开
    VERFAHREN

    公开(公告)号：EP2844676A1

    公开(公告)日：2015-03-11

    申请号：EP13720506.8

    申请日：2013-04-30

    申请人： Innovia Films Limited

    发明人： COCKROFT, Martin Richard

    IPC分类号： C08B9/00 ,  C08J5/18 ,  D01F2/00

    CPC分类号： C08B9/00 ,  D01F2/06

    摘要： A process for the manufacture of viscose comprising the steps of: a) providing a non- dissolving pulp as a raw material; b) steeping the pulp in caustic solution; c) processing the steeped pulp; d) steeping the processed steeped pulp for a second time in caustic solution; and e) further processing the pulp from step d) to form a viscose solution; wherein the steeping conditions are selected such that: when the pulp comprises a Softwood Kraft pulp as at least the or a major component, the caustic concentration of the solution in step d) is at least about 11.5% w/w and the ratio of caustic concentration in the solution of step b) to that of the solution in step d) (the S1/S2 ratio) is from 1 to 1.8; when the pulp comprises a Bleached Eucalyptus pulp as at least the or a major component, the caustic concentration of the solution in step d) is from 15% w/w to 20% w/w and the ratio of caustic concentration in the solution of step b) to that of the solution in step d) (the S1/S2 ratio) is from 0.1 to 5; and when the pulp comprises a non-dissolving pulp other than a Softwood Kraft or Bleached Eucalyptus pulp as at least the or a major component, the caustic concentration of the solution in step d) is at least about 11.5% w/vv and the ratio of caustic concentration in the solution of step b) to that of the solution in step d) (the S1/S2 ratio) is from 0.1 to 5.

    摘要翻译： 制造粘胶的方法包括以下步骤：a）提供不溶解的纸浆作为原料; b）将纸浆浸入苛性碱溶液中; c）加工浸渍的纸浆; d）在苛性碱溶液中浸渍处理过的浸渍纸浆第二次; 和e）从步骤d）进一步处理纸浆以形成粘胶溶液。