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1.发明申请公开(公告)号：US20230003509A1
公开(公告)日：2023-01-05
申请号：US17757253
申请日：2020-12-18
申请人： Stora Enso OYJ
发明人： Ari Jäsberg , Riku Pihko , Otto Nylén
摘要： The present document discloses a method of determining thickness of a wet film, in particular of microfibrillated cellulose. The method comprises conveying said film (20) in a wet state on a conveyor (10) having a conveyor width, the wet film having a film width which is less than the conveyor width, providing a laser projection (1511) across a film edge, acquiring a series of images, each depicting an area of the conveyor, wherein the laser projection, a portion of the film and a portion of an exposed conveyor surface are visible, and using at least some of said images to determine at least one of a film thickness and a film thickness distribution across the film width. The document also discloses a method of forming a film, in particular a microfibrillated cellulose film, and a device for producing such film.
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公开(公告)号：US11105045B2
公开(公告)日：2021-08-31
申请号：US16337130
申请日：2017-09-27
申请人： Stora Enso OYJ
发明人： Riku Pihko , Vesa Kunnari
摘要： The present invention relates to a method for the production of a film comprising microfibrillated cellulose, wherein the method comprises the steps of; providing a suspension comprising between 70 weight-% to 100 weight-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension, drying the web in a drying equipment wherein the web is at least partly dried at a drying rate above 75 kg(H2O)/m2/h by use of hot air whereby a film is formed. The invention also relates to a film produce according to the method and a paper or paperboard substrate comprising said film.
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公开(公告)号：US20210324580A1
公开(公告)日：2021-10-21
申请号：US17292191
申请日：2019-11-08
申请人： Stora Enso OYJ
发明人： Isto Heiskanen , Jukka Kankkunen , Riku Pihko , Vesa Kunnari
摘要： The present invention relates to a method for dewatering a web comprising microfibrillated cellulose, wherein the method comprises the steps of: providing a suspension comprising between 50 weight-% to 100 weight-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension on a support wherein said web has a dry content of 1-25% by weight, applying a dewatering felt into direct contact with the fibrous web, conducting said fibrous web, arranged between said dewatering felt and said substrate, through a pressing equipment. The invention further relates to a film produced from said method.
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4.发明申请公开(公告)号：US20190226146A1
公开(公告)日：2019-07-25
申请号：US16337130
申请日：2017-09-27
申请人： Stora Enso OYJ
发明人： Riku Pihko , Vesa Kunnari
摘要： The present invention relates to a method for the production of a film comprising microfibrillated cellulose, wherein the method comprises the steps of; providing a suspension comprising between 70 weight-% to 100 weight-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension, drying the web in a drying equipment wherein the web is at least partly dried at a drying rate above 75 kg(H2O)/m2/h by use of hot air whereby a film is formed. The invention also relates to a film produce according to the method and a paper or paperboard substrate comprising said film.
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公开(公告)号：US11619004B2
公开(公告)日：2023-04-04
申请号：US17292191
申请日：2019-11-08
申请人： Stora Enso OYJ
发明人： Isto Heiskanen , Jukka Kankkunen , Riku Pihko , Vesa Kunnari
摘要： The present invention relates to a method for dewatering a web comprising microfibrillated cellulose, wherein the method comprises the steps of: providing a suspension comprising between 50 weight-% to 100 weight-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension on a support wherein said web has a dry content of 1-25% by weight, applying a dewatering felt into direct contact with the fibrous web, conducting said fibrous web, arranged between said dewatering felt and said substrate, through a pressing equipment. The invention further relates to a film produced from said method.
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