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:
Nov. 08, 2016
Filed:
Jun. 17, 2013
Nalco Company, Naperville, IL (US);
Yulin Zhao, Shanghai, CN;
Jun Li, Hubei, CN;
Qing Long Rao, Shanghai, CN;
Stephen Ashton, Saint Charles, IL (US);
Weiguo Cheng, Naperville, IL (US);
Aleksandar Todorovic, Helsinki, FI;
Alan Smith, Sandbach, GB;
NALCO Company, Naperville, IL (US);
Abstract
The invention provides a method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in a papermaking process The method improves the efficiency of drainage aids or wet web strength aids or wet strength aid by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a those additives. The drainage additive or wet web strength additive or wet strength aid holds the cellulose fibers together tightly and is not wasted on the filler particles.