A PAPER OR PAPERBOARD SUBSTRATE, A PROCESS FOR PRODUCTION OF THE SUBSTRATE AND A PACKAGE FORMED OF THE SUBSTRATE

摘要

The present invention relates to a paper or paperboard substrate having barrier properties which substrate comprises a first fiber based layer, a second layer comprising microfibrillated cellulose and a third layer comprising a polymer. The invention further relates to a process for the production of said substrate and a package formed of said substrate.