US Patent Issued to UPM-Kymmene on June 16 for "Polymer-coated cellulosic release liner base material" (Finnish Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,655,325, issued on June 16, was assigned to UPM-Kymmene Corp. (Helsinki).

"Polymer-coated cellulosic release liner base material" was invented by Kuisma Littunen (Lappeenranta, Finland), Harri Kosonen (Lappeenranta, Finland), Jaakko Rautalahti (Tampere, Finland), Janne Antila (Hameenlinna, Finland) and Mikko Rissanen (Espoo, Finland).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a polymer-coated cellulosic substrate (S2) for a release liner (REL1), comprising a cellulosic support layer (PAP1), a first coating layer (PO1), comprising a first composition containing polyolefin, and an extruded primer layer (PRIM1) comprising a seco...