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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 10844545 B1

PDFFull Text
Date of Patent:
Nov. 24, 2020

Filed:

Jan. 20, 2016

Superabsorbent material sat (super absorbent tissue)

Applicant:

Gianfranco Palumbo, Pescara, IT;

Inventor:

Gianfranco Palumbo, Pescara, IT;

Assignee:

Other;

Attorney:

Stradley Ronon Stevens & Young, LLP

Primary Examiner:

Dennis R Cordray

Int. Cl.
CPC ...
D21H 21/22 (2006.01); B01J 20/26 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); B01J 20/32 (2006.01); D21H 21/20 (2006.01); D21H 17/43 (2006.01); D21H 17/45 (2006.01); D21H 17/55 (2006.01); D21H 19/12 (2006.01); D21H 27/00 (2006.01); D21H 27/10 (2006.01); A61L 15/60 (2006.01);
U.S. Cl.
CPC ...
D21H 21/22 (2013.01); A61L 15/60 (2013.01); B01J 20/261 (2013.01); B01J 20/28023 (2013.01); B01J 20/28028 (2013.01); B01J 20/3085 (2013.01); B01J 20/327 (2013.01); B01J 20/3225 (2013.01); B01J 20/3293 (2013.01); D21H 17/43 (2013.01); D21H 17/45 (2013.01); D21H 17/55 (2013.01); D21H 19/12 (2013.01); D21H 21/20 (2013.01); D21H 27/002 (2013.01); D21H 27/10 (2013.01);
Abstract

A method for wet production of a superabsorbent material. The method comprises forming an aqueous saline solution with a concentration of 0.01-4.5 N of ionic salt and a pH from 0 to 6.0 or from 8.0 to 14.0 by the addition of a strong acid or strong base; dispersing in the saline solution a water superabsorbent polymer (SAP); creating a first web by stratification and deposition under vacuum suction onto a mesh screen belt deposition section of the SAP dispersion; washing the web with a basic solution (or with an acidic solution) up to the desired level of neutralization of the acidity (or basicity) for SAP dispersions in acidic (or basic) saline solutions; washing the web with water and suction; and drying the web. The relationship between pH and salt concentration causes a water absorption in the SAP equal to or less than about 30.00 g/g.

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