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:
Jul. 14, 2015
Filed:
Mar. 18, 2010
Jari Räsänen, Imatra, FI;
Tapani Penttinen, Huutjärvi, FI;
Ali Harlin, Kerava, FI;
Jaakko Hiltunen, Kauniainen, FI;
Hanne Wikberg, Espoo, FI;
Tekla Tammelin, Karkkila, FI;
Jari Räsänen, Imatra, FI;
Tapani Penttinen, Huutjärvi, FI;
Ali Harlin, Kerava, FI;
Jaakko Hiltunen, Kauniainen, FI;
Hanne Wikberg, Espoo, FI;
Tekla Tammelin, Karkkila, FI;
STORA ENSO OYJ, Helsinki, FI;
Abstract
The invention relates to a method of treating chemical pulp fibers by a polymerizing hydroxy acid, the fibers thus obtained and the products refined from them. In the method, the hydroxy acid reacts with the reactive groups of the fibers in the presence of a catalyst, forming ester bonds. The following units of the same hydroxy acid are oligomerized and/or polymerized to these grafted acid residues. The fibers thus treated and the products refined thereof endure better processing stages that include drawing and stretching than untreated fibers.