The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2024
Filed:
Nov. 16, 2022
Nippon Shokubai Co., Ltd., Osaka, JP;
Tsuyoshi Yorino, Himeji, JP;
Daisuke Takeda, Himeji, JP;
Yoshitaka Ikeuchi, Himeji, JP;
Shigeru Sakamoto, Himeji, JP;
Yoshihiro Shobo, Himeji, JP;
Yoshifumi Adachi, Himeji, JP;
Ryota Wakabayashi, Himeji, JP;
Daisuke Takagi, Himeji, JP;
Sachie Kitabata, Himeji, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
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.