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    MODIFIED FIBER, METHODS, AND SYSTEMS
    1.
    发明申请
    MODIFIED FIBER, METHODS, AND SYSTEMS 审中-公开

    公开(公告)号：US20180258589A1

    公开(公告)日：2018-09-13

    申请号：US15976654

    申请日：2018-05-10

    Applicant: International Paper Company

    Inventor： Charles E. Miller

    IPC: D21H11/20 ,  B01J19/24 ,  C08J3/24 ,  D21C9/00

    CPC classification number: D21H11/20 ,  B01J19/2405 ,  B01J2219/24 ,  C08J3/24 ,  C08J3/246 ,  C08J2301/02 ,  C08J2333/02 ,  C08J2433/02 ,  D21C9/00 ,  D21C9/001 ,  D21C9/002 ,  D21C9/005

    Abstract: Methods of forming crosslinked cellulose include mixing a crosslinking agent with an aqueous mixture of cellulose fibers containing little to no excess water (e.g., solids content of 25-55%), drying the resulting mixture to 85-100% solids, then curing the dried mixture to crosslink the cellulose fibers. Systems include a mixing unit to form, from an aqueous mixture of unbonded cellulose fibers having a solids content of about 25-55% and a crosslinking agent, a substantially homogenous mixture of non-crosslinked, unbonded cellulose fibers and crosslinking agent; a drying unit to dry the substantially homogenous mixture to a consistency of 85-100%; and a curing unit and to cure the crosslinking agent to form dried and cured crosslinked cellulose fibers. Intrafiber crosslinked cellulose pulp fibers produced by such methods and/or systems have a chemical on pulp level of about 2-14% and an AFAQ capacity of at least 12.0 g/g.

    Modified fiber from shredded pulp sheets, methods, and systems
    3.
    发明授权
    Modified fiber from shredded pulp sheets, methods, and systems 有权

    公开(公告)号：US11339532B2

    公开(公告)日：2022-05-24

    申请号：US16192526

    申请日：2018-11-15

    Applicant: International Paper Company

    Inventor： Charles E. Miller ,  Alan D. Lovas

    IPC: D21C9/00 ,  D21H13/06 ,  D21B1/06 ,  D21H17/37 ,  D21H17/38 ,  D21H17/39 ,  D21H15/02

    Abstract: Methods of forming crosslinked cellulose include mixing a crosslinking agent with cellulose mat fiber fragments composed of hydrogen-bonded cellulose fibers and having a solids content of about 45-95% to form a substantially homogenous mixture of non-crosslinked, individualized cellulose fibers, drying the resulting mixture to 85-100% solids, then curing the dried mixture under conditions effective to crosslink the cellulose fibers. Some of such methods may include fragmenting a cellulose fiber mat to form the mat fragments. Systems include a mixing unit (such as a high-consistency mixer) configured to form, from the mat fragments and a crosslinking agent, a substantially homogenous mixture of non-crosslinked, individualized cellulose fibers and crosslinking agent, at ambient conditions, a drying unit to dry the substantially homogenous mixture to a consistency of 85-100%, and a curing unit and to cure the crosslinking agent to form dried and cured crosslinked cellulose fibers.

    GRAFTED CROSSLINKED CELLULOSE
    4.
    发明申请
    GRAFTED CROSSLINKED CELLULOSE 审中-公开

    公开(公告)号：US20200087435A1

    公开(公告)日：2020-03-19

    申请号：US16549903

    申请日：2019-08-23

    Applicant: INTERNATIONAL PAPER COMPANY

    Inventor： Karen Brogan ,  Charles E. Miller ,  Angel Stoyanov ,  Torsten Lindner ,  Maike Siemons

    IPC: C08F251/02 ,  B01J20/28 ,  B01J20/26 ,  B01J20/24 ,  D01F11/02 ,  D21H17/37 ,  D21H11/20 ,  D21H11/16 ,  D21H27/00 ,  C08B15/00 ,  C08B3/08 ,  D21H21/22 ,  D21C9/00

    Abstract: Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.

    Modified fiber from shredded pulp sheets, methods, and systems
    5.
    发明授权
    Modified fiber from shredded pulp sheets, methods, and systems 有权

    公开(公告)号：US10156042B2

    公开(公告)日：2018-12-18

    申请号：US14983402

    申请日：2015-12-29

    Applicant: INTERNATIONAL PAPER COMPANY

    Inventor： Charles E. Miller ,  Alan D. Lovas

    IPC: D21C9/00 ,  D21H15/02 ,  D21H17/37 ,  D21H17/38 ,  D21H17/39 ,  D21H13/06 ,  D21H11/20 ,  D21B1/06

    Abstract: Methods of forming crosslinked cellulose include mixing a crosslinking agent with cellulose mat fiber fragments composed of hydrogen-bonded cellulose fibers and having a solids content of about 45-95% to form a substantially homogenous mixture of non-crosslinked, individualized cellulose fibers, drying the resulting mixture to 85-100% solids, then curing the dried mixture under conditions effective to crosslink the cellulose fibers. Some of such methods may include fragmenting a cellulose fiber mat to form the mat fragments. Systems include a mixing unit (such as a high-consistency mixer) configured to form, from the mat fragments and a crosslinking agent, a substantially homogenous mixture of non-crosslinked, individualized cellulose fibers and crosslinking agent, at ambient conditions, a drying unit to dry the substantially homogenous mixture to a consistency of 85-100%, and a curing unit and to cure the crosslinking agent to form dried and cured crosslinked cellulose fibers.

    Grafted crosslinked cellulose
    7.
    发明授权
    Grafted crosslinked cellulose 有权

    公开(公告)号：US10287383B2

    公开(公告)日：2019-05-14

    申请号：US15355697

    申请日：2016-11-18

    Applicant: INTERNATIONAL PAPER COMPANY

    Inventor： Karen Brogan ,  Charles E. Miller ,  Angel Stoyanov ,  Torsten Lindner ,  Maike Siemons

    IPC: C08F251/02 ,  B01J20/24 ,  C08B3/08 ,  C08B15/00 ,  D21H27/00 ,  D21H11/16 ,  D21H11/20 ,  D21H17/37 ,  D01F11/02 ,  B01J20/26 ,  B01J20/28 ,  D01F2/00

    Abstract: Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.

    Modified fiber, methods, and systems
    8.
    发明授权
    Modified fiber, methods, and systems 有权

    公开(公告)号：US09995000B2

    公开(公告)日：2018-06-12

    申请号：US15253450

    申请日：2016-08-31

    Applicant: International Paper Company

    Inventor： Charles E. Miller

    IPC: D21H11/20 ,  C08J3/24 ,  B01J19/24 ,  D21C9/00

    CPC classification number: D21H11/20 ,  B01J19/2405 ,  B01J2219/24 ,  C08J3/24 ,  C08J3/246 ,  C08J2301/02 ,  C08J2333/02 ,  C08J2433/02 ,  D21C9/00 ,  D21C9/001 ,  D21C9/002 ,  D21C9/005

    Abstract: Methods of forming crosslinked cellulose include mixing a crosslinking agent with an aqueous mixture of cellulose fibers containing little to no excess water (e.g., solids content of 25-55%), drying the resulting mixture to 85-100% solids, then curing the dried mixture to crosslink the cellulose fibers. Systems include a mixing unit to form, from an aqueous mixture of unbonded cellulose fibers having a solids content of about 25-55% and a crosslinking agent, a substantially homogenous mixture of non-crosslinked, unbonded cellulose fibers and crosslinking agent; a drying unit to dry the substantially homogenous mixture to a consistency of 85-100%; and a curing unit and to cure the crosslinking agent to form dried and cured crosslinked cellulose fibers. Intrafiber crosslinked cellulose pulp fibers produced by such methods and/or systems have a chemical on pulp level of about 2-14% and an AFAQ capacity of at least 12.0 g/g.

    Grafted crosslinked cellulose
    9.
    发明授权
    Grafted crosslinked cellulose 有权

    公开(公告)号：US11591429B2

    公开(公告)日：2023-02-28

    申请号：US17241421

    申请日：2021-04-27

    Applicant: INTERNATIONAL PAPER COMPANY

    Inventor： Karen Brogan ,  Charles E. Miller ,  Angel Stoyanov ,  Torsten Lindner ,  Maike Siemons

    IPC: C08F251/02 ,  C08B3/08 ,  C08B15/00 ,  D21H27/00 ,  D21H11/16 ,  D21H11/20 ,  D21H17/37 ,  D01F11/02 ,  D21C9/00 ,  D21H21/22 ,  B01J20/24 ,  B01J20/26 ,  B01J20/28 ,  D01F2/00

    Abstract: Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.

    GRAFTED CROSSLINKED CELLULOSE
    10.
    发明申请
    GRAFTED CROSSLINKED CELLULOSE 有权

    公开(公告)号：US20210246247A1

    公开(公告)日：2021-08-12

    申请号：US17241421

    申请日：2021-04-27

    Applicant: INTERNATIONAL PAPER COMPANY

    Inventor： Karen Brogan ,  Charles E. Miller ,  Angel Stoyanov ,  Torsten Lindner ,  Maike Siemons

    IPC: C08F251/02 ,  C08B3/08 ,  C08B15/00 ,  D21H27/00 ,  D21H11/16 ,  D21H11/20 ,  D21H17/37 ,  D01F11/02 ,  D21C9/00 ,  D21H21/22 ,  B01J20/24 ,  B01J20/26 ,  B01J20/28

    Abstract: Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.

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