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. 23, 2013
Filed:
Mar. 13, 2009
Kunihiko Ishizaki, Himeji, JP;
Koji Matsumoto, Himeji, JP;
Yoshiro Mitsukami, Himeji, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
[PROBLEM] To obtain a particulate water absorbent having excellent and stabilized physical properties. [SOLUTION] One example of the production method for particulate water-absorbing agent of the present invention includes a polymerization step for polymerizing a monomer to obtain a polymer gel, a drying step for drying the polymer gel to obtain a particulate water-absorbing resin, a pulverization step for pulverizing the particulate water-absorbing resin, a classification step for sieving the particulate water-absorbing resin, a surface cross-linking step for cross-linking the neighborhood of the surface of the particulate water-absorbing resin to obtain the particulate water-absorbing agent, a packaging step for filling the particulate water-absorbing agent into a packaging material container for packaging, and a transportation step for transporting the products produced in each of the steps to the other steps, wherein at least any one of the steps including and subsequent to the drying step is in two or more lines, for one line of the polymerization step.