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:
Jun. 18, 2019
Filed:
Nov. 04, 2014
Sumitomo Seika Chemicals Co. Ltd., Kako-gun, JP;
Hiroki Yabuguchi, Himeji, JP;
Tetsuhiro Hinayama, Himeji, JP;
Maoki Hama, Himeji, JP;
Hideki Yokoyama, Himeji, JP;
Sumitomo Seika Chemicals Co. Ltd., Kako-gun, JP;
Abstract
Provided are: a water-absorbent resin which, when used as an absorbent material, retains a high water-absorption performance, increases the diffusivity of a to-be-absorbed liquid and makes it possible to effectively decrease the amount of re-wet; and an absorbent article formed using an absorbent material including the water-absorbent resin. The water-absorbent resin according to the present invention is a water-absorbent resin obtained by polymerizing a water-soluble ethylenically monomer in the presence of an internal-crosslinking agent and thereafter post-crosslinking the polymer with a post-crosslinking agent, characterized in that when subjected to a liquid flow test, the water-absorbent resin has an effective absorbent material index (K) indicated by equation (I) of 250 or greater.Effective absorbent material index ()=[(the amount of liquid flow) (g)]×[(artificial-urine absorption ratio) (g/g)]  (I)