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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
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.
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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
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.
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公开(公告)号：US11724284B2
公开(公告)日：2023-08-15
申请号：US16481688
申请日：2018-01-30
Applicant: Stora Enso OYJ
Inventor： Lars Axrup , Isabel Knöös , Christian Aulin , Magnus Hillergren , Tom Lindström , Göran Ström
IPC: D21H11/18 , D21H21/14 , D21H23/50 , B05D7/04 , B05D1/02 , B05D1/30 , B05D1/38 , B05D7/00 , C08J5/18 , C09D101/02
CPC classification number: B05D7/04 , B05D1/02 , B05D1/30 , B05D1/38 , B05D7/534 , C08J5/18 , C09D101/02
Abstract: The method of the invention relates to a method of manufacturing a fibrous, oxygen barrier film by casting a suspension comprising microfibrillated cellulose onto a non-porous substrate in a number of subsequent steps with intermediate drying. The invention enables an efficient method to manufacture an MFC film by casting technology without the problems of cracks or voids formed in the film. By applying the MFC in several layers, with in-between drying, the distance the water has to diffuse through is shorter, whereby the evaporation is more efficient and the film properties are not negatively affected by the drying.
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公开(公告)号：US20200023409A1
公开(公告)日：2020-01-23
申请号：US16481688
申请日：2017-01-30
Applicant: Stora Enso OYJ
Inventor： Lars Axrup , Isabel Knöös , Christian Aulin , Magnus Hillergren , Tom Lindström , Göran Ström
Abstract: The method of the invention relates to a method of manufacturing a fibrous, oxygen barrier film by casting a suspension comprising microfibrillated cellulose onto a non-porous substrate in a number of subsequent steps with intermediate drying. The invention enables an efficient method to manufacture an MFC film by casting technology without the problems of cracks or voids formed in the film. By applying the MFC in several layers, with in-between drying, the distance the water has to diffuse through is shorter, whereby the evaporation is more efficient and the film properties are not negatively affected by the drying.
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