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. 26, 2023
Filed:
Nov. 16, 2017
Nippon Shokubai Co., Ltd., Osaka, JP;
Hiroyasu Watabe, Himeji, JP;
Mai Sato, Himeji, JP;
Ryota Wakabayashi, Himeji, JP;
Yoshihiro Shobo, Himeji, JP;
Shin-ya Katsube, Himeji, JP;
Motohiro Imura, Himeji, JP;
Koji Honda, Himeji, JP;
Shin-ichi Fujino, Himeji, JP;
Kunihiko Ishizaki, Himeji, JP;
Tokio Shuto, Suita, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
The production method includes a drying step of drying a particulate crosslinked hydrogel polymer obtained by polymerizing a monomer, which is a material of a water-absorbent resin, using a heating device to obtain dried particles. The heating device includes: a rotary container that contains the particulate crosslinked hydrogel polymer therein and rotates; and a plurality of heating tubes that are located within the rotary container, extend in an axial direction of the rotary container, and rotate together with the rotary container. A gel temperature of the particulate crosslinked hydrogel polymer to be subjected to the drying step, the gel temperature being measured by a contact thermometer, is not lower than 50° C.