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:
Aug. 11, 2015
Filed:
Sep. 16, 2010
Sayaka Machida, Himeji, JP;
Kazushi Torii, Himeji, JP;
Yoko Shirai, Himeji, JP;
Hiroyuki Ikeuchi, Himeji, JP;
Kunihiki Ishizaki, Himeji, JP;
Sayaka Machida, Himeji, JP;
Kazushi Torii, Himeji, JP;
Yoko Shirai, Himeji, JP;
Hiroyuki Ikeuchi, Himeji, JP;
Kunihiki Ishizaki, Himeji, JP;
Nippon Shokubai Co., Ltd, Osaka, JP;
Abstract
A method for producing a water-absorbing resin comprises circulation of the water-absorbing resin in a predetermined amount in a pulverization step before a surface cross-linking step. At least a part of a classified polymer is supplied again to the same or a different pulverization step before the surface cross-linking step, wherein the circulation pulverization ratio in the pulverization step, represented by the following equation, is 1.10 to 1.50:(Circulation pulverization ratio)=(total supply amount of the water-absorbing resin to the pulverization step)/(total discharge amount of the water-absorbing resin at the drying step)wherein (total supply amount of the water-absorbing resin to the pulverization step)=(total discharge amount of the water-absorbing resin at the drying step)+(amount of the classified polymer supplied again to the same or a different pulverization step).