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:
Aug. 16, 2011
Filed:
Dec. 17, 2005
Oliver Koch, Eppelheim, DE;
Frank Prechtl, Frankfurt, DE;
Rainer Blum, Mannheim, DE;
Detlef Kannengiesser, Zwingenberg, DE;
Oliver Koch, Eppelheim, DE;
Frank Prechtl, Frankfurt, DE;
Rainer Blum, Mannheim, DE;
Detlef Kannengiesser, Zwingenberg, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A method for the production of paper, cardboard and card by adding a microparticle system consisting of a polymer retention agent having a molar mass Mof at least 2 million and a fine-part inorganic component in order to form a paper material having a material density of a 20 g/l maximum and by dewatering the paper material, wherein the paper material undergoes at least one shearing step prior to or after addition of the retention agent and wherein the retention agent is introduced in a dosed manner into the paper material in at least two places and the fine inorganic component is dosed prior to or after addition of the retention agent or between two dosing points for the retention agent.