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    Method to form a web comprising fibers
    51.
    发明授权
    Method to form a web comprising fibers 有权

    公开(公告)号：US10927503B2

    公开(公告)日：2021-02-23

    申请号：US16345348

    申请日：2017-10-27

    Applicant: Stora Enso OYJ

    Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen

    IPC: D21H11/18 ,  D21H21/06 ,  D21H23/04 ,  D21H17/03 ,  D21H17/70 ,  D21H23/02 ,  D21H17/20

    Abstract: The invention discloses a method to enable the efficient use of surfactants in web forming of a cellulose containing material, e.g. in the making of paper or paperboard. The method comprises the addition of microfibrillated cellulose (MFC) or nanocrystalline cellulose (NCC) to the white water in a web-forming process in order to form complexes with surface active agents. The formed complexes are at least partly recycled to the process. This enables the producer to have control over the concentration of surface active agents in the system.

    Method to produce a film comprising microfibrillated cellulose and an amphoteric polymer
    54.
    发明授权
    Method to produce a film comprising microfibrillated cellulose and an amphoteric polymer 有权

    公开(公告)号：US10577747B2

    公开(公告)日：2020-03-03

    申请号：US15754870

    申请日：2016-09-16

    Applicant: Stora Enso OYJ

    Inventor： Isto Heiskanen ,  Kaj Backfolk

    IPC: D21H11/18 ,  D21H21/20 ,  D21H17/32 ,  D21H17/37 ,  B32B27/10 ,  D21H21/10 ,  D21H17/22 ,  D21H17/28 ,  D21H17/24 ,  D21H17/31

    Abstract: A method for the production of a film 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 amphoteric polymer to said suspension to provide a mixture of said microfibrillated cellulose and said amphoteric polymer, providing said mixture to a substrate to form a fibrous web, wherein the amount of amphoteric polymer in said mixture is in the range of 0.1 to 20 kg/metric ton based on total dry solid content; and dewatering said fibrous web to form a film having a basis weight of less than 40 g/m2 and a density in the range of from 700 to 1000 kg/m3.

    Surface sizing of dense films
    55.
    发明授权
    Surface sizing of dense films 有权

    公开(公告)号：US10435842B2

    公开(公告)日：2019-10-08

    申请号：US15758963

    申请日：2016-09-16

    Applicant: Stora Enso OYJ

    Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Esa Saukkonen

    IPC: D21H11/18 ,  D21H21/16 ,  D21H19/10 ,  D21H19/36 ,  D21H17/26 ,  D21H17/57

    Abstract: A method for manufacturing a film, wherein said film has a basis weight of less than 50 g/m2 and wherein the density of the film is higher than 750 kg/m2 comprising the steps of: providing a suspension comprising microfibrillated cellulose (MFC); forming a web of said suspension on a porous wire, microfibrillated cellulose (MFC); surface sizing said web, wherein the web, at the beginning of the surface sizing step, has a moisture content in the range of from 10 to 50 wt-%; drying said surface sized web to a final moisture content of between 0.1-20 wt-% to form said film.

    FLEXIBLE MICROFIBRILLATED FILM FORMATION
    59.
    发明申请
    FLEXIBLE MICROFIBRILLATED FILM FORMATION 审中-公开

    公开(公告)号：US20180245286A1

    公开(公告)日：2018-08-30

    申请号：US15754692

    申请日：2016-09-16

    Applicant: Stora Enso OYJ

    Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Katja Lyytikainen

    IPC: D21H11/18 ,  D21H27/30

    CPC classification number: D21H11/18 ,  D21H27/30

    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.

    A METHOD OF MAKING A THERMOPLASTIC FIBER COMPOSITE MATERIAL AND WEB
    60.
    发明申请
    A METHOD OF MAKING A THERMOPLASTIC FIBER COMPOSITE MATERIAL AND WEB 审中-公开
    一种制备热塑性复合材料和网络的方法

    公开(公告)号：US20170067208A1

    公开(公告)日：2017-03-09

    申请号：US15309286

    申请日：2015-05-06

    Applicant: STORA ENSO OYJ

    Inventor： Kaj Backfolk

    IPC: D21H13/12 ,  D21H13/14 ,  D21H17/37 ,  D21H17/35 ,  D21H17/53 ,  D21H17/28 ,  D21H17/70 ,  D21H13/24

    CPC classification number: D21H13/12 ,  D21H13/14 ,  D21H13/24 ,  D21H17/28 ,  D21H17/35 ,  D21H17/37 ,  D21H17/53 ,  D21H17/675 ,  D21H17/70 ,  D21H17/71

    Abstract: A method for forming a thermoplastic composite material in a papermaking machine, wherein the method comprises the steps of: forming an aqueous fiber material suspension; bringing said fiber suspension in contact with at least one additive, said additive being introduced into said fiber suspension, whereby said additive reacts to form a precipitation product onto or into the fibers, thereby forming an intermediate suspension, introducing, after the formation of the intermediate suspension, a plastic material into said intermediate suspension, thereby forming a plastic fiber composite suspension.

    Abstract translation: 一种在造纸机中形成热塑性复合材料的方法，其中所述方法包括以下步骤：形成水性纤维材料悬浮液; 使所述纤维悬浮液与至少一种添加剂接触，所述添加剂被引入所述纤维悬浮液中，由此所述添加剂反应以在纤维上或纤维中形成沉淀产物，从而形成中间体悬浮液，在中间体形成之后引入 将塑料材料悬浮在所述中间体悬浮液中，从而形成塑料纤维复合悬浮液。

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