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:
Jun. 16, 2026
Filed:
Sep. 17, 2020
Applicant:
Upm-kymmene Corporation, Helsinki, FI;
Inventors:
Kuisma Littunen, Lappeenranta, FI;
Harri Kosonen, Lappeenranta, FI;
Jaakko Rautalahti, Tampere, FI;
Janne Antila, Hämeenlinna, FI;
Mikko Rissanen, Espoo, FI;
Assignee:
UPM-Kymmene Corporation, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 9/00 (2006.01); C09J 7/40 (2018.01);
U.S. Cl.
CPC ...
C09J 7/405 (2018.01); C09J 7/401 (2018.01); C09J 2301/312 (2020.08); C09J 2301/41 (2020.08); C09J 2301/50 (2020.08); C09J 2423/105 (2013.01);
Abstract
The invention relates to a polymer-coated cellulosic substrate (S) for a release liner (REL), comprising a cellulosic support layer (PAP), a first coating layer (PO), comprising a first composition containing polyolefin, and an extruded primer layer (PRIM) comprising a second composition containing a thermoplastic polymer covalently bonded to functional vinyl groups: wherein the first coating layer (POI) is situated between the cellulosic support layer (PAP) and the extruded primer layer (PRIM).