公开(公告)号：US10138599B2

公开(公告)日：2018-11-27

申请号：US15535456

申请日：2015-12-14

Applicant: STORA ENSO OYJ

Inventor： Christian Aulin ,  Lars Axrup ,  Göran Flodberg ,  Magnus Hillergren ,  Tom Lindström ,  Carl-Henrik Ljungqvist ,  Göran Ström

IPC: D21H19/34 ,  D21H23/50 ,  D21H23/70 ,  D21H27/10 ,  D21H27/32 ,  D21H11/18 ,  B32B37/15 ,  B32B37/24

Abstract: The present invention relates to process for the production of a coated substrate comprising cellulosic fibers, the process comprising the steps of: i) providing a first substrate comprising cellulosic fibers and having a dry content of less than 50%; ii) applying a coating composition to the first substrate in an amount of more than 5 g/m2, calculated as dry weight of the coating composition, wherein the coating composition comprises: microfibrillated cellulose (MFC), and optionally a water retention agent selected from carboxymethyl cellulose (CMC), anionic polyacrylamide (A-PAM), sodium polyacrylates, polyacrylic acid derivatives, guar gum, alginate, MFC prepared from carboxymethylated fibers, MFC prepared from oxidized fibers, MFC prepared by CMC-functionalized fibers, and/or combinations thereof; and iii) mechanically dewatering the first substrate. The present process provides an energy efficient coating process which can be performed online.

公开(公告)号：US20170342661A1

公开(公告)日：2017-11-30

申请号：US15535456

申请日：2015-12-14

Applicant: STORA ENSO OYJ

Inventor： Christian Aulin ,  Lars Axrup ,  Göran Flodberg ,  Magnus Hillergren ,  Tom Lindström ,  Carl-Henrik Ljungqvist ,  Göran Ström

IPC: D21H19/34 ,  D21H23/70 ,  D21H11/18 ,  D21H23/50 ,  D21H27/32 ,  D21H27/10

CPC classification number: D21H19/34 ,  B32B37/153 ,  B32B2037/243 ,  B32B2317/12 ,  D21H11/18 ,  D21H23/50 ,  D21H23/70 ,  D21H27/10 ,  D21H27/32

Abstract: The present invention relates to process for the production of a coated substrate comprising cellulosic fibres, the process comprising the steps of: i) providing a first substrate comprising cellulosic fibres and having a dry content of less than 50%; ii) applying a coating composition to the first substrate in an amount of more than 5 g/m2, calculated as dry weight of the coating composition, wherein the coating composition comprises: microfibrillated cellulose (MFC), and optionally a water retention agent selected from carboxymethyl cellulose (CMC), anionic polyacrylamide (A-PAM), sodium polyacrylates, polyacrylic acid derivatives, guar gum, alginate, MFC prepared from carboxymethylated fibers, MFC prepared from oxidized fibers, MFC prepared by CMC-functionalised fibers, and/or combinations thereof; and iii) mechanically dewatering the first substrate. The present process provides an energy efficient coating process which can be performed online.