Invention Application
- Patent Title: A METHOD TO PRODUCE A FIBROUS PRODUCT COMPRISING MICROFIBRILLATED CELLULOSE
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Application No.: PCT/IB2018/060159Application Date: 2018-12-17
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Publication No.: WO2019123191A1Publication Date: 2019-06-27
- Inventor: BACKFOLK, Kaj , HEISKANEN, Isto , SAUKKONEN, Esa , LYYTIKÄINEN, Katja
- Applicant: STORA ENSO OYJ
- Applicant Address: P.O. Box 309 00101 Helsinki FI
- Assignee: STORA ENSO OYJ
- Current Assignee: STORA ENSO OYJ
- Current Assignee Address: P.O. Box 309 00101 Helsinki FI
- Agency: STEINRUD, Henrik
- Priority: SE1751572-7 20171219
- Main IPC: C08L1/02
- IPC: C08L1/02 ; C08J5/18 ; D21H11/18 ; D21H17/28 ; D21H17/32
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.
Information query