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    Processes for improving high aspect ratio cellulose filament blends
    1.
    发明授权
    Processes for improving high aspect ratio cellulose filament blends 有权

    公开(公告)号：US11352747B2

    公开(公告)日：2022-06-07

    申请号：US16383459

    申请日：2019-04-12

    Applicant: Mercer International Inc.

    Inventor： Tobias Ziegenbein

    IPC: D21C5/00 ,  D21H11/16 ,  D01F2/00 ,  D01G5/00

    Abstract: A process for improving high aspect ratio cellulose filament blends comprising the steps of: a) providing a blend of cellulose nano-filaments or blend of cellulose micro-filaments; b) diluting the blend of cellulose nano-filaments or the blend of cellulose micro-filaments to a target consistency; c) fractionating the diluted blend of cellulose nano-filaments or the diluted blend of cellulose micro-filaments from the step c); and, d) collecting the fraction of the diluted blend of cellulose nano-filaments or the diluted blend of cellulose micro-filaments from the step c) having an average length of greater than at least about 25 μm.

    Sanitary tissue products comprising nanofilaments
    2.
    发明授权
    Sanitary tissue products comprising nanofilaments 有权

    公开(公告)号：US10703871B2

    公开(公告)日：2020-07-07

    申请号：US16587111

    申请日：2019-09-30

    Applicant: Mercer International Inc.

    Inventor： Tobias Ziegenbein

    IPC: D21H27/34 ,  D21H27/30 ,  D21H21/18 ,  D21H15/06 ,  D21H11/18 ,  D21H11/00 ,  D21H11/04 ,  D21H11/20 ,  D21H13/02 ,  D21H17/25 ,  D21H21/20 ,  D21H27/00 ,  C08J5/18 ,  C08L1/06

    Abstract: A differential density soft sanitary tissue paper web having from about 2% to about 56.5% by weight of the differential density soft sanitary tissue paper web of a softwood pulp fiber mixture, and from about 43.5% to about 99.9% by weight of the dry fiber basis of the differential density soft sanitary tissue paper web of a hardwood pulp fiber mixture is provided. The softwood pulp fiber mixture has: 1) from about 0% to about 56.4% by weight of the dry fiber basis of softwood pulp fiber; 2) from about 0.05% to about 3.0% by weight of the dry fiber basis of strengthening additive. The hardwood pulp fiber mixture comprises: 1) from about 43.4% to about 99.4% by weight of the dry fiber basis of hardwood pulp fibers; and, 2) from about 0.05% to about 20.0% by weight of the dry fiber basis of cellulose nano-filaments.

    ABSORBENT PAPER PRODUCTS HAVING UNIQUE PHYSICAL STRENGTH PROPERTIES
    3.
    发明申请
    ABSORBENT PAPER PRODUCTS HAVING UNIQUE PHYSICAL STRENGTH PROPERTIES 审中-公开

    公开(公告)号：US20180195239A1

    公开(公告)日：2018-07-12

    申请号：US15708491

    申请日：2017-09-19

    Applicant: Mercer International Inc.

    Inventor： Tobias Ziegenbein

    IPC: D21H27/30 ,  D21H27/00 ,  D21H17/44 ,  D21H21/20 ,  B32B29/00

    CPC classification number: D21H27/30 ,  B32B29/005 ,  B32B2250/02 ,  B32B2307/54 ,  B32B2317/12 ,  B32B2554/00 ,  D21F11/14 ,  D21H11/02 ,  D21H11/08 ,  D21H11/18 ,  D21H15/02 ,  D21H17/44 ,  D21H21/20 ,  D21H27/002 ,  D21H27/005

    Abstract: An absorbent towel paper product having a machine direction and a cross-machine direction orthogonal to the machine direction, wherein the absorbent towel paper product comprises two plies of absorbent towel paper webs, wherein each paper web comprises from about 20% to about 90% by weight of the dry fiber basis of the towel paper web of a refined long fiber soft wood pulp fiber mixture comprising from about 18.5% to about 88.5% by weight of the dry fiber basis of the towel paper web of long fiber soft wood pulp fiber, wherein the long fiber soft wood pulp fiber is optionally refined before being added to the mixture; from about 0.25% to about 5.0% by weight of the dry fiber basis of the tissue paper web of cationic strengthening polymer, from about 10% to about 55% by weight of the dry fiber basis of the tissue paper web of a hard wood pulp fiber mixture; and not more than about 10% by weight moisture; wherein the two-ply paper product has a Mean Square Tensile Index value ranging from about 10 N·m/g to about 18 N·m/g; and wherein the two-ply paper product has a Cross-directional Wet Tensile Strength to Cross-directional Dry Tensile Strength Ratio value ranging from about 0.295 to about 0.33.

    FIBROUS STRUCTURE PRODUCTS COMPRISING LAYERS EACH HAVING DIFFERENT LEVELS OF CELLULOSE NANOPARTICLES
    4.
    发明申请
    FIBROUS STRUCTURE PRODUCTS COMPRISING LAYERS EACH HAVING DIFFERENT LEVELS OF CELLULOSE NANOPARTICLES 审中-公开

    公开(公告)号：US20200223178A1

    公开(公告)日：2020-07-16

    申请号：US16697060

    申请日：2019-11-26

    Applicant: Mercer International Inc.

    Inventor： Tobias Ziegenbein

    IPC: B32B5/26 ,  B32B5/30

    Abstract: A fibrous structure having at least two layers is disclosed. Each of the at least two layers has a mixture of structural fibers selected from the group consisting of softwood fibers, non-wood fibers, natural non-cellulosic fibers, man-made cellulosic or non-cellulosic fibers, hardwood fibers, recycled fibers, and mixtures thereof. Each of the at least two layers are disposed in a face-to-face relationship. A second layer of the at least two layers has from about 0.05 percent to about 20 percent by weight of the second layer of cellulose nanoparticles.

    PROCESS FOR MAKING ABSORBENT TOWEL AND SOFT SANITARY TISSUE PAPER WEBS
    5.
    发明申请
    PROCESS FOR MAKING ABSORBENT TOWEL AND SOFT SANITARY TISSUE PAPER WEBS 审中-公开

    公开(公告)号：US20200024803A1

    公开(公告)日：2020-01-23

    申请号：US16587102

    申请日：2019-09-30

    Applicant: Mercer International Inc.

    Inventor： Tobias Ziegenbein

    IPC: D21F11/14 ,  D21H15/10 ,  D21H13/02 ,  D21H11/12 ,  D21H17/59 ,  D21H21/20 ,  D21H21/06 ,  D21H27/00

    Abstract: A process for making an absorbent towel paper web is disclosed. The process steps include a) providing a papermaking furnish, b) forming a differential density wet fibrous web from the paper making furnish; and, c) drying the differential density wet fibrous web until fibrous web contains not more than about 10% by weight moisture to form the absorbent towel paper web. Step a) provides the steps of providing: i) from about 20.1% to about 99.9% by weight of a softwood pulp fiber mixture and, ii) from greater than 0% to about 79.9% by weight of a hardwood pulp fiber mixture. Step i) further provides the steps of providing u) from about 20% to about 99.8% by weight of softwood pulp fiber, v) from about 0.05% to about 20% by weight of cellulose nano-filaments, and, w) from about 0.05% to about 5.0% by weight of strengthening additive.

    Process for making absorbent towel and soft sanitary tissue paper webs
    9.
    发明授权
    Process for making absorbent towel and soft sanitary tissue paper webs 有权

    公开(公告)号：US10731295B2

    公开(公告)日：2020-08-04

    申请号：US16587102

    申请日：2019-09-30

    Applicant: Mercer International Inc.

    Inventor： Tobias Ziegenbein

    IPC: D21F11/14 ,  D21H15/10 ,  D21H13/02 ,  D21H27/00 ,  D21H17/59 ,  D21H21/20 ,  D21H21/06 ,  D21H11/12

    Abstract: A process for making an absorbent towel paper web is provided. The process steps include a) providing a papermaking furnish, b) forming a differential density wet fibrous web from the paper making furnish; and, c) drying the differential density wet fibrous web until fibrous web contains not more than about 10% by weight moisture to form the absorbent towel paper web. Step a) provides the steps of providing: i) from about 20.1% to about 99.9% by weight of a softwood pulp fiber mixture and, ii) from greater than 0% to about 79.9% by weight of a hardwood pulp fiber mixture. Step i) further provides the steps of providing u) from about 20% to about 99.8% by weight of softwood pulp fiber, v) from about 0.05% to about 20% by weight of cellulose nano-filaments, and, w) from about 0.05% to about 5.0% by weight of strengthening additive.

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