公开(公告)号：EP3312218A4

公开(公告)日：2018-06-27

申请号：EP16811776

申请日：2016-06-20

申请人： NIPPON CATALYTIC CHEM IND

发明人： YORINO TSUYOSHI ,  TAKEDA DAISUKE ,  IKEUCHI YOSHITAKA ,  SAKAMOTO SHIGERU ,  SHOBO YOSHIHIRO ,  ADACHI YOSHIFUMI ,  WAKABAYASHI RYOTA ,  TAKAGI DAISUKE ,  KITABATA SACHIE

IPC分类号： C08J3/12 ,  A61L15/00 ,  C08F6/00 ,  C08F220/00

CPC分类号： C08J3/12 ,  A61L15/00 ,  C08F6/00 ,  C08F220/00 ,  C08J2333/00

摘要： To provide a disposable diaper enabling reduction in re-wet amount and having an excellent speed of incorporating liquid regardless of concentration and configuration of a water-absorbing agent in an absorbent material. A water-absorbing agent having excellent Gel Capillary Absorption (GCA) and Free Gel Bed Permeability (FGBP) is obtained by crushing a crosslinked hydrogel polymer obtained in a polymerization step to have a specific weight average particle diameter while fluid retention capacity and a surface tension of a water-absorbing agent are adjusted in a specific range, drying the crushed crosslinked hydrogel polymer, and then adding a liquid permeability enhancer thereto during surface crosslinking or after surface crosslinking.