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    A METHOD TO PRODUCE A FIBROUS PRODUCT COMPRISING MICROFIBRILLATED CELLULOSE
    1.
    发明专利
    A METHOD TO PRODUCE A FIBROUS PRODUCT COMPRISING MICROFIBRILLATED CELLULOSE 未知

    公开(公告)号：CA3081654A1

    公开(公告)日：2019-06-27

    申请号：CA3081654

    申请日：2018-12-17

    Applicant: STORA ENSO OYJ

    Inventor： BACKFOLK KAJ ,  HEISKANEN ISTO ,  SAUKKONEN ESA ,  LYYTIKAINEN KATJA

    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.

    METHOD FOR MAKING A FILM COMPRISING MFC
    2.
    发明专利
    METHOD FOR MAKING A FILM COMPRISING MFC 未知

    公开(公告)号：CA3043139A1

    公开(公告)日：2018-05-24

    申请号：CA3043139

    申请日：2017-11-16

    Applicant: STORA ENSO OYJ

    Inventor： HEISKANEN ISTO ,  BACKFOLK KAJ ,  SAUKKONEN ESA ,  RIBU VILLE ,  LYYTIKAINEN KATJA

    IPC: C08J5/18

    Abstract: Method for making a film that comprises microfibrillated cellulose, wherein the film has low OTR values and especially suitable for a tropical environment. The method comprising the steps of providing a suspension comprising microfibrillated cellulose (MFC), forming a film from said suspension, wherein the film having a solid content above40%, preferably above50%,treating the film with flame or plasma treatment, such that a surface activation takes place on the film, and cooling the film, wherein the surface of the film having a decreased OTR value and a high moisture resistance.

    A METHOD TO PRODUCE A FIBROUS PRODUCT COMPRISING MICROFIBRILLATED CELLULOSE
    4.
    发明专利
    A METHOD TO PRODUCE A FIBROUS PRODUCT COMPRISING MICROFIBRILLATED CELLULOSE 未知

    公开(公告)号：CA3142586A1

    公开(公告)日：2020-12-24

    申请号：CA3142586

    申请日：2020-06-15

    Applicant: STORA ENSO OYJ

    Inventor： BACKFOLK KAJ ,  HEISKANEN ISTO ,  LYYTIKAINEN KATJA ,  NYLEN OTTO

    IPC: D21H11/18 ,  B32B27/06 ,  C08J5/18 ,  C08L1/02 ,  D21H17/41 ,  D21H17/66

    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 native microfibrillated cellulose, wherein the content of the microfibriIlated cellulose of said suspension is in the range of 40 to 99.9 weight-% based on total dry solid content, said fibrous suspension further comprising organic acid, a metal salt or a mixture thereof, wherein the amount of organic acid, metal salt or mixture thereof is at least 2 weight-% based on total dry solid content of the suspension, - said fibrous suspension also comprising an uncharged, amphoteric or weakly cationic polymer having a molecular weight of at least 50000 g/mol, - said fibrous suspension also comprising an anionic polymer having a molecular weight of at least 10000 g/mol to said suspension, - providing said suspension to a substrate to form a fibrous web, wherein the amount of uncharged, amphoteric or weakly cationic polymer in said suspension 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 suspension is in the range of 0.01 to 10 kg/metric ton based on total dry solid content; and - dewatering said fibrous web to form a fibrous product.

    A METHOD FOR PRODUCING A FILM HAVING GOOD BARRIER PROPERTIES
    9.
    发明专利
    A METHOD FOR PRODUCING A FILM HAVING GOOD BARRIER PROPERTIES 未知

    公开(公告)号：CA2995478A1

    公开(公告)日：2017-03-23

    申请号：CA2995478

    申请日：2016-09-16

    Applicant: STORA ENSO OYJ

    Inventor： HEISKANEN ISTO ,  BACKFOLK KAJ ,  SAUKKONEN ESA ,  RUOHONIEMI NINA ,  LYYTIKAINEN KATJA

    IPC: D21H11/18 ,  B29D7/01 ,  B65D65/46 ,  C08J5/18 ,  D21H21/20

    Abstract: The present invention relates to a method for manufacturing a film having an oxygen transmission rate in the range of from 1 cc/m2/24h to 500 cc/m2/24h according to ASTM D-3985, at a relative humidity of more than 50 % at 25°C, or higher than 75% at 25°C, or higher than 85% at 25°C, wherein the method comprises the steps of: providing a first suspension comprising a microfibrillated cellulose, wherein the dry content of the suspension is in the range of from 0.1 to 10% by weight, adding a wet strength additive to said first suspension, at an amount of from 0.1 to 10 weight-% based on the amount of microfibrillated cellulose (dry/dry), thereby forming a mixture of the microfibrillated cellulose and the wet strength additive, applying said mixture to a substrate to form a fibrous web and drying said web to form said film. The present invention also relates to a film produced according to the method.

    FLEXIBLE MICROFIBRILLATED FILM FORMATION
    10.
    发明专利
    FLEXIBLE MICROFIBRILLATED FILM FORMATION 未知

    公开(公告)号：CA2994388A1

    公开(公告)日：2017-03-23

    申请号：CA2994388

    申请日：2016-09-16

    Applicant: STORA ENSO OYJ

    Inventor： HEISKANEN ISTO ,  BACKFOLK KAJ ,  LYYTIKAINEN KATJA

    IPC: D21H27/30 ,  B32B29/00 ,  D21H11/18

    Abstract: A method of manufacturing a film comprising microfibrillated cellulose,, wherein the method comprises the steps of: providing a first suspension comprising microfibrillated cellulose, having a dry content of from 0.2 to 2.0 %, wherein the first suspension has a first Schopper-Riegler (SR) value; forming a first web of said suspension; at least partly dewatering said first web; applying a second suspension comprising microfibrillated cellulose, and/or fines and/or fibers onto a surface of said formed and at least partially dried first web, wherein the second suspension has a second Schopper- Riegler value which is higher than said first Schopper-Riegler value, thereby forming a film.

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