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:
Apr. 05, 2022
Filed:
Oct. 10, 2018
Solenis Technologies Cayman, L.p., George Town, KY;
Christoph Hamers, Ludwigshafen, DE;
Anton Esser, Ludwigshafen, DE;
Frans De Bruyn, Bad Duerkheim, DE;
Christopher Alan Gray, Ludwigshafen, DE;
Ralph Isermann, Ludwigshafen, DE;
Solenis Technologies, L.P., Wilmington, DE (US);
Abstract
A method to produce dried single-layer or multi-layer paper is disclosed. The method comprises, for a single-layer paper, preparing and spraying a partially dehydrated first fibrous web with a spray solution or suspension to give a sprayed partially dehydrated first fibrous web, and dehydrating the sprayed partially dehydrated first fibrous web by applying heat to form a dried single-layer paper; or, for a multi-layer paper, preparing and spraying a partially dehydrated layer compound with a spray solution or suspension to form a sprayed layer compound, and dehydrating the sprayed layer compound by applying heat to form a dried multi-layer paper. The spray solution or suspension comprises water and at least one water-soluble polymer P, which is obtained by polymerizing: (i) a monomer of formula HCCHNHC(0)R, where Ris H or C-C- alkyl; and (ii) one or more ethylenically unsaturated monomers different from monomer (i).