公开(公告)号：EP1365058A4

公开(公告)日：2004-10-06

申请号：EP01978997

申请日：2001-11-02

申请人： JAPAN EXLAN CO LTD

发明人： NAKASHIMA SHIGERU ,  KOHARA NORIYUKI ,  IENO MASAO

IPC分类号： D06L4/30 ,  D06M11/63 ,  D06M11/36 ,  D06M11/44 ,  D06M11/76 ,  D06M13/338

CPC分类号： D06M11/63 ,  D06M2101/28 ,  Y10T428/249921 ,  Y10T428/249964 ,  Y10T428/2835 ,  Y10T428/2891 ,  Y10T442/2139

摘要： A method for the manufacture of moisture absorbing fiber having high whiteness, characterized in that an acrylic fiber comprising acrylonitrile polymer where a (meth)acrylate compound as a copolymer component is less than 5% by weight is subjected to crosslink introduction treatment using a hydrazine compound, to hydrolysis and to reducing treatment. A method for the manufacture of moisture absorbing fiber having high whiteness, characterized in that (1) acrylic fiber comprising acrylonitrile copolymer where a (meth) acrylate compound as a copolymer component is less than 5% by weight is treated with a hydrazine compound whereby introduction of crosslink and increase in nitrogen content to an extent of 1.0 &tilde& 10.0% by weight is carried out, (2) treatment with an aqueous solution of alkaline metal salt is carried out whereby carboxyl group of a metal salt type by which CN group is hydrolyzed is produced in an amount of 4.0 &tilde& 10.0 meq/g and (3) a reducing treatment by a reduction treatment agent selected from a group consisting of hydrosulfite, thiosulfate, sulfite, nitrite, thiourea dioxide, ascorbate and hydrazine compound is carried out.