Invention Grant
- Patent Title: Method to produce a fibrous product comprising microfibrillated cellulose
-
Application No.: US16955470Application Date: 2018-12-17
-
Publication No.: US11326306B2Publication Date: 2022-05-10
- Inventor: Kaj Backfolk , Isto Heiskanen , Esa Saukkonen , Katja Lyytikäinen
- Applicant: Stora Enso OYJ
- Applicant Address: FI Helsinki
- Assignee: Stora Enso OYJ
- Current Assignee: Stora Enso OYJ
- Current Assignee Address: FI Helsinki
- Agency: Greer, Burns & Crain, Ltd.
- Priority: SE1751572-7 20171219
- International Application: PCT/IB2018/060159 WO 20181217
- International Announcement: WO2019/123191 WO 20190627
- Main IPC: D21H11/18
- IPC: D21H11/18 ; B32B27/10 ; B32B27/32 ; D21F1/00 ; D21H17/32 ; D21H17/42 ; D21H17/45 ; D21H21/08 ; D21H23/04

Abstract:
A method for the production of a fibrous product from a fibrous web, wherein the method comprises the steps of: —providing a fibrous suspension comprising a microfibrillated cellulose, wherein the content of the microfibrillated cellulose of said suspension is in the range of 60 to 99.9 weight-% based on total dry solid content, —adding an uncharged, amphoteric or weakly cationic polymer having a molecular weight of at least 50000 g/mol to said suspension, —adding an anionic polymer having a molecular weight of at least 00000 g/mol to said suspension to provide a mixture of said microfibrillated cellulose, said uncharged, amphoteric or weakly cationic polymer and said anionic polymer, 1—providing said mixture to a substrate to form a fibrous web, wherein the amount of uncharged, amphoteric or weakly cationic polymer in said mixture is in the range of 0.1 to 20 kg/metric ton based on total dry solid content and wherein the amount of anionic polymer in said mixture is in the range of 0.01 to 10 kg/metric ton based on total dry 20 solid content; and—dewatering said fibrous web to form a fibrous product.
Public/Granted literature
- US20210095424A1 A METHOD TO PRODUCE A FIBROUS PRODUCT COMPRISING MICROFIBRILLATED CELLULOSE Public/Granted day:2021-04-01
Information query