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:
Sep. 18, 2012
Filed:
Apr. 25, 2008
Tarja Sinkko, Lappeenranta, FI;
Mikko Oksanen, Lappeenranta, FI;
Janne Varvemaa, Lappeenranta, FI;
Kyösti Haapoja, Valkeakoski, FI;
Teuvo Leppänen, Taavetti, FI;
Tarja Sinkko, Lappeenranta, FI;
Mikko Oksanen, Lappeenranta, FI;
Janne Varvemaa, Lappeenranta, FI;
Kyösti Haapoja, Valkeakoski, FI;
Teuvo Leppänen, Taavetti, FI;
UPM-Kymmene Oyj, Helsinki, FI;
Abstract
The invention relates to a paper that is formed of a fiber-based source material and is applicable as printing paper. According to the invention, the surface of the paper is surface-treated by arranging sufficient density on the surface, such that a mixture is arranged at least on one side of the surface of the paper for forming a surface layer, which mixture comprises pigments in an amount of 75-95% by weight of the dry weight and bonding agent in an amount of 5-25% by weight of the dry weight, and the porosity of the surface layer of the paper is less than 0.07 ml/g as defined by mercury porosimeter process. Furthermore, the invention relates to a method for making paper.