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. 19, 2014
Filed:
Aug. 30, 2010
Koji Matsumoto, Himeji, JP;
Kozo Nogi, Himeji, JP;
Shinichi Fujino, Himeji, JP;
Yorimichi Dairoku, Setouchi, JP;
Kunihiko Ishizaki, Himeji, JP;
Koji Matsumoto, Himeji, JP;
Kozo Nogi, Himeji, JP;
Shinichi Fujino, Himeji, JP;
Yorimichi Dairoku, Setouchi, JP;
Kunihiko Ishizaki, Himeji, JP;
Nippon Shokubai, Co., Ltd., Osaka, JP;
Abstract
A production method for a water-absorbent resin, comprising a polymerization step for obtaining hydrogel by subjecting a monomer aqueous solution to a polymerization reaction, and a drying step for drying the hydrogel, wherein drying in the drying step is performed using a continuous through-flow belt-type drying machine, the solid content of the hydrogel supplied to the drying step is 35% by weight or more, and thickness variation rate (1) represented by the following EXPRESSION 1 of the hydrogel loaded onto through-flow belt in the continuous through-flow belt, is 1.05 to 5:[MATH. 1]Thickness variation rate (1)=(Maximum thickness of hydrogel in a width direction of the through-flow belt)/(Average thickness of hydrogel in a width direction of the through-flow belt).  [EXPRESSION 1]