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:
Jan. 14, 2025
Filed:
Mar. 27, 2020
Sumitomo Seika Chemicals Co., Ltd., Hyogo, JP;
Xinlei Yan, Himeji, JP;
Masahiro Murakami, Himeji, JP;
SUMITOMO SEIKA CHEMICALS CO., LTD., Hyogo, JP;
Abstract
A water-absorbent resin includes a partially neutralized polyacrylic acid having a crosslinked structure and has a swelling height of 3.5 mm/0.5 g or more with respect to 3.3 mass % salt water, as determined under the following measurement conditions: 0.5 g of water-absorbent resin particles are sprayed over a circular concave cup having a height of 30 mm and an inner diameter of 80.5 mm; a nonwoven fabric is spread thereon; a circular convex cylinder having an outer diameter of 80 mm is placed on the nonwoven fabric, and 55 g of 3.3 mass % salt water at 20° C. is poured into the circular concave cup; one minute after the start of water absorption by the water-absorbent resin particles, the degree that the circular convex cylinder is pushed up due to swelling of the water-absorbent resin particles is measured as a salt water swelling height of the water-absorbent resin.