公开(公告)号：US20220340735A1

公开(公告)日：2022-10-27

申请号：US17753798

申请日：2020-09-15

Applicant: Stora Enso OYJ

Inventor： Cecilia Land Hensdal ,  Venkata Prabhakar Soudham ,  Kaj Backfolk

IPC: C08L1/02 ,  C08J5/18 ,  C09D101/02 ,  C09D7/63 ,  B65D65/40 ,  B65D65/46

Abstract: The present invention is directed to a film or coating comprising a fiber material, wherein at least 60% by weight of said fiber material is microfibrillated cellulose, said film or coating also comprising at least 1% by weight of extractives from wood bark or cork wood. The invention is also directed to products, such as packaging materials, using or incorporating said film or coating. Such packaging materials are for example laminates or multi-layer structures. The films or coatings according to the present invention having advantageous barrier properties and are therefore particularly suitable for sensitive objects that need to be packaged in a controlled or modified atmosphere. The present invention is also directed to a composition comprising a fiber material, wherein at least 60% by weight of said fiber material is microfibrillated cellulose, said composition also comprising at least 1% by weight of extractives from wood bark or cork wood. The composition is useful for example in the preparation of the film or coating.