公开(公告)号：US20230193559A1

公开(公告)日：2023-06-22

申请号：US17907028

申请日：2021-03-22

Applicant: Stora Enso OYJ

Inventor： Otto Nylén ,  Isto Heiskanen ,  Joanna Rahko ,  Riku Pihko

IPC: D21H11/18 ,  D21F3/02 ,  D21H17/06 ,  D21H25/06

CPC classification number: D21H11/18 ,  D21F3/0236 ,  D21H17/06 ,  D21H25/06 ,  B82Y30/00

Abstract: The present invention relates to a method for producing a film comprising nanocellulose, which method comprises: providing a suspension comprising 50-100 weight-% of nanocellulose based on total dry weight; forming a fibrous web of said suspension on a non-porous support; providing a press fabric comprising a web-side first surface and an opposite second surface, wherein said press fabric comprises a woven first fabric layer arranged in the press fabric as a layer providing said web-side first surface such that said press fabric has a woven surface structure at said web-side first surface; applying said web-side surface of said press fabric into direct contact with said web; wet-pressing said web by conducting said web, arranged between said press fabric and said non-porous support, through a pressing equipment, and drying the dewatered web so as to form said film. The invention further relates to a film produced from said method.