IDiyas

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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.:

US 10406256 B1

PDFFull Text
Date of Patent:
Sep. 10, 2019

Filed:

Aug. 28, 2014

Gel pulverization device, method for manufacturing polyacrylic acid (polyacrylate) superabsorbent polymer powder, and superabsorbent polymer powder

Applicant:

Nippon Shokubai Co., Ltd., Osaka, JP;

Inventors:

Kazushi Torii, Hyogo, JP;

Kohei Omori, Hyogo, JP;

Nobuya Tanaka, Hyogo, JP;

Shigeru Sakamoto, Hyogo, JP;

Kenji Tada, Hyogo, JP;

Hironori Sato, Hyogo, JP;

Assignee:

NIPPON SHOKUBAI CO., LTD., Osaka-Shi, Osaka, JP;

Attorney:

Harness, Dickey & Pierce, P.L.C.

Primary Examiner:

Hoa (Holly) Le

Int. Cl.
CPC ...
C08J 3/12 (2006.01); A61L 15/24 (2006.01); B02C 19/00 (2006.01); B02C 19/22 (2006.01); B29B 15/00 (2006.01); B29B 9/06 (2006.01); B29B 9/12 (2006.01); C08J 3/075 (2006.01); B01J 20/26 (2006.01); C08F 2/10 (2006.01); C08F 220/06 (2006.01); C08F 6/00 (2006.01); B29K 33/00 (2006.01); B29K 105/00 (2006.01); B29B 9/16 (2006.01); B29C 48/68 (2019.01); B29C 48/685 (2019.01);
U.S. Cl.
CPC ...
A61L 15/24 (2013.01); B01J 20/261 (2013.01); B02C 19/0056 (2013.01); B02C 19/22 (2013.01); B29B 9/06 (2013.01); B29B 9/12 (2013.01); B29B 15/00 (2013.01); C08F 2/10 (2013.01); C08F 6/008 (2013.01); C08F 220/06 (2013.01); C08J 3/075 (2013.01); C08J 3/12 (2013.01); B01J 2220/68 (2013.01); B29B 9/16 (2013.01); B29B 2009/125 (2013.01); B29C 48/681 (2019.02); B29C 48/687 (2019.02); B29K 2033/00 (2013.01); B29K 2105/251 (2013.01); B29K 2995/0092 (2013.01); C08J 2333/02 (2013.01);
Abstract

Provided is a water absorbent resin that is useful to sanitary materials such as a disposable diaper, a sanitary napkin, and a blood absorbent for medical use each having a higher liquid permeability and a higher water absorbing speed. Further provided is a water absorbent resin powder that is useful to sanitary materials such as a disposable diaper, a sanitary napkin, and a blood absorbent for medical use each having increased in absorbency of a liquid and in heat retaining property. A gel grinding device to be used to produce a water absorbent resin, includes: a screw; a feed opening; an extrusion opening; a porous plate; and a barrel, the barrel including a return preventing member provided on an inner surface thereof, and the return preventing member satisfying at least one of specific parameters.

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