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:
Sep. 18, 2001
Filed:
Apr. 07, 1999
Koji Miyake, Okayama, JP;
Toru Yanase, Hyogo, JP;
Yoshifumi Adachi, Himeji, JP;
Takumi Hatsuda, Takasago, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
A manufacturing method of absorbent resin of the present invention includes, in addition to a drying step of drying hydrogel of a crosslinked polymer to obtain a dried product and a pulverizing step of pulverizing the dried product, a separating step of separating a incompletely dried product contained in the dried product therefrom. Since particles of the incompletely dried product are larger than those of the dried product, the former can be readily separated from the latter in the separating step by classifying the dried product to particles of a particle size within a predetermined range. Consequently, the incompletely dried product is never delivered to the pulverizing step, and therefore, it has become possible to prevent inconveniences, such as causing a trouble in pulverizing the dried product, and the incompletely dried product being mixed into the absorbent resin. Hence, in drying and subsequently pulverizing the hydrogel of a crosslinked polymer, that is, in manufacturing the absorbent resin, it has become possible to provide a method capable of manufacturing absorbent resin efficiently while avoiding troubles caused by the production of the incompletely dried product during the drying step.