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    METHOD FOR SPRAYING CHEMICAL SOLUTION
    12.
    发明公开
    METHOD FOR SPRAYING CHEMICAL SOLUTION 审中-公开

    公开(公告)号：US20230183922A1

    公开(公告)日：2023-06-15

    申请号：US17999030

    申请日：2021-05-17

    申请人： MAINTECH CO., LTD.

    发明人： Hiroshi SEKIYA ,  Tomohiko NAGATSUKA ,  Kazuyujki YUSA ,  Ayano SUGA

    IPC分类号： D21F1/32 ,  D21F7/12 ,  D21H11/14

    CPC分类号： D21F1/325 ,  D21F7/12 ,  D21H11/14

    摘要： A chemical solution spraying method for spraying a chemical solution onto a canvas K1 has a loop shape in a side view while reciprocating two nozzle devices S at the same speed along rail L extending in a width direction of canvas K1 with respect to canvas K1, in which time period Tc during which canvas K1 is in contact with wet paper X is 0.03 seconds or more, time period Tn required for nozzle devices S to each one-way move is 0.5 to 10 minutes, traveling speed Vp of canvas K1 is 500 m/min or more, length K of canvas K1 is 20 to 80 m, a number of times of contact N of any point on a surface of canvas K1 with wet paper X during time period Tn, time period Tn, traveling speed Vp, and length K satisfy a relationship of N=(Tn·Vp)/K, under predetermined conditions.

    High Efficiency Fiber Bleaching Process
    14.
    发明公开
    High Efficiency Fiber Bleaching Process 审中-公开

    公开(公告)号：US20230167604A1

    公开(公告)日：2023-06-01

    申请号：US18159700

    申请日：2023-01-26

    申请人： GPCP IP Holdings LLC

    发明人： Jeffrey A. Lee

    IPC分类号： D21C9/10 ,  D21C9/16 ,  D21H11/14

    CPC分类号： D21C9/1057 ,  D21C9/163 ,  D21H11/14 ,  D21C9/1084 ,  D21C9/1063

    摘要： A high efficiency bleaching method for cellulosic pulp includes: (a) providing a charge of aqueous cellulosic pulp to a bleaching vessel at a consistency of from 10% to 30% along with a peroxy bleaching agent and an alkaline agent effective to adjust pH of the charge to 9.5 to 12.5; and (b) bleaching the aqueous cellulosic pulp in the bleaching vessel while maintaining a bleaching temperature of from 110° F. (43° C.) to 135° F. (57° C.) and a pH of the charge from 9.5 to 12.5 for an extended bleaching retention time. The bleaching method is advantageously used to bleach low brightness recycle pulp, and/or as part of a multistage process with bleaching stages of lesser duration, and/or as a high peroxy efficiency, low dose bleaching process or in connection with concurrently storing and bleaching pulp.

    COMPOSITIONS AND METHODS FOR INCREASED WET AND DRY STRENGTH
    15.
    发明申请
    COMPOSITIONS AND METHODS FOR INCREASED WET AND DRY STRENGTH 有权

    公开(公告)号：US20230140638A1

    公开(公告)日：2023-05-04

    申请号：US17910401

    申请日：2021-03-17

    申请人： KEMIRA OYJ

    发明人： Chen LU

    IPC分类号： D21H17/45 ,  C08F220/56 ,  D21H21/20 ,  D21H11/14 ,  D21H27/00 ,  D21H23/04

    摘要： The present disclosure generally relates to glyoxalated polyacrylamide (GPAM) products, compositions comprising GPAM products, and methods of use thereof, particularly in the paper industry. Moreover, the present disclosure generally pertains to cationic GPAM products, compositions comprising, and use thereof in papermaking applications and in products such as paper-based products, wherein the cationic GPAM products may provide increased wet and/or dry strength to the paper-based product and wherein such GPAMs optionally can be stored and transported to a papermaking site without the addition of large volumes of aqueous carriers.

    FIBER-BASED CUP DESIGN, CHEMISTRY AND TOOLING
    16.
    发明申请
    FIBER-BASED CUP DESIGN, CHEMISTRY AND TOOLING 有权

    公开(公告)号：US20230138993A1

    公开(公告)日：2023-05-04

    申请号：US17944874

    申请日：2022-09-14

    申请人： Footprint LLC

    发明人： Yoke Dou Chung ,  Yiyun Zhang ,  Chee Lee

    IPC分类号： D21J3/10 ,  D21H21/20 ,  D21H21/16 ,  D21H17/28 ,  D21H17/17 ,  D21H11/14 ,  D21H11/02 ,  A47G19/22

    摘要： A fiber-based, plastic-free drinking cup is formed by providing a fiber-based slurry comprising a hydrophobic additive and a strength additive, then forming a drinking cup component by compressing and drying the fiber-based slurry in a form press assembly having an internal shape characterized by a conic frustum. The fiber-based slurry may include a dry pulp mixture of virgin fiber and recycled fiber, the hydrophobic additive is 1.0-10.0% of the dry pulp weight, and the strength additive is 1.0-10.0% of the dry pulp weight. In particular, the fiber-based slurry may include about 50% bleached hardwood, about 50% bleached softwood, about 2.5% strength additive, and about 3.5% hydrophobic additive by dry pulp weight.

    BINDER AND FORMED BODY PRODUCING METHOD
    18.
    发明申请
    BINDER AND FORMED BODY PRODUCING METHOD 有权

    公开(公告)号：US20230047851A1

    公开(公告)日：2023-02-16

    申请号：US17875492

    申请日：2022-07-28

    申请人： SEIKO EPSON CORPORATION

    发明人： Shigemi WAKABAYASHI

    IPC分类号： D21H17/28 ,  D21H17/68 ,  D21H11/14

    摘要： A binder includes an inorganic oxide particle and a binding material particle containing a binding material to mutually bind fibers when water is provided, wherein the binder includes a composite particle in which the binding material particle and the inorganic oxide particle are integrated, the inorganic oxide particle contains carbon, and the content of the carbon is 2% by mass or more relative to the mass of the inorganic oxide particle.

    Grass-Containing Liquid Packaging Board
    20.
    发明申请
    Grass-Containing Liquid Packaging Board 有权

    公开(公告)号：US20220290374A1

    公开(公告)日：2022-09-15

    申请号：US17636723

    申请日：2020-08-18

    申请人： CREAPAPER GmbH

    发明人： Uwe D'AGNONE

    IPC分类号： D21H17/17 ,  B65D5/40 ,  B65D65/46 ,  D21F11/00 ,  D21H11/12 ,  D21H11/14 ,  D21H19/34 ,  D21H21/10 ,  D21H27/10

    摘要： The method according to the invention for producing a grass fibre-containing liquid packaging board has the following steps, specifically: providing a fibre suspension formed from at least a first and second pulp type, wherein the first pulp type is constituted by grass fibres, and the second pulp type is selected from a group of pulps which comprises primary fibres such as chemical pulp, for example sulphate pulp or sulphite pulp, in each case based on long-fibre wood or short-fibre wood, wood pulp, and synthetic fibres or recycled fibres based on one or more recycled paper classifications, mixing and/or swelling the fibres in the pulp suspension under predefined conditions with respect to material density and temperature, grinding the at least two pulp types together in a pulp suspension to a degree of dewatering between 40° SR and 60° SR, adding starch and/or a sizing agent as an additive in the mass, diluting the pulp suspension and producing a board on a paper machine, surface sizing the board using at least one starch-containing suspension, and drying the paper structure to a dry content between 4% and 10%.