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    Process for preparing reduced odor and improved brightness individualized, polycarboxylic acid crosslinked fibers
    11.
    发明授权
    Process for preparing reduced odor and improved brightness individualized, polycarboxylic acid crosslinked fibers 失效
    用于制备减少气味和改善亮度的方法单独的多元羧酸交联纤维

    公开(公告)号：US5562740A

    公开(公告)日：1996-10-08

    申请号：US490793

    申请日：1995-06-15

    Applicant: Jeffery T. Cook ,  Walter D. Daniels ,  Pedro A. Rodriguez ,  Peter A. Graef ,  Clifford R. Bolstad ,  William L. Duncan

    Inventor： Jeffery T. Cook ,  Walter D. Daniels ,  Pedro A. Rodriguez ,  Peter A. Graef ,  Clifford R. Bolstad ,  William L. Duncan

    IPC: A61F13/53 ,  A61F5/44 ,  A61F13/15 ,  A61F13/472 ,  A61F13/49 ,  A61L15/24 ,  A61L15/28 ,  A61L15/46 ,  D06M11/38 ,  D06M11/50 ,  D06M13/02 ,  D06M13/192 ,  D06M13/207 ,  D06M101/06 ,  D21C9/00 ,  D21H11/20 ,  D21H13/06 ,  D21H21/22

    CPC classification number: A61L15/46 ,  A61L15/24 ,  A61L15/28 ,  D06M11/38 ,  D06M11/50 ,  D06M13/192 ,  D06M13/207 ,  D21C9/005 ,  A61L2300/11

    Abstract: Disclosed is a process for making reduced odor individualized, crosslinked fibers which includes the steps of providing cellulosic fibers, contacting the fibers with a solution containing a C.sub.2 -C.sub.9 polycarboxylic acid crosslinking agent, mechanically separating the fibers into substantially individual form, drying the fibers and reacting the crosslinking agent with the individualized fibers to form intrafiber crosslink bonds. The individualized cellulosic fibers are then contacted with a strong alkaline solution and strong oxidizing agent to reduce the odor and increase the brightness. Preferably, the crosslinking agent is citric acid, and preferably, between about 1.0 weight % and about 12.0 weight % of the crosslinking agent reacts to form the intrafiber crosslink bonds. Preferably, the alkaline solution is an aqueous solution of sodium hydroxide, and preferably, about 0.09 weight % of the sodium hydroxide, on a dry fiber weight basis, is applied to the crosslinked fibers. Preferably, the oxidizing agent is hydrogen peroxide, and preferably, about 0.04 weight % of the hydrogen peroxide, on a dry fiber weight basis, is applied to the crosslinked fiber. The reduced odor individualized, crosslinked fibers are useful in a variety of absorbent structure applications.

    Abstract translation: 公开了一种制备减少气味的个体化交联纤维的方法，其包括以下步骤：提供纤维素纤维，使纤维与含有C 2 -C 9多元羧酸交联剂的溶液接触，将纤维机械分离成基本上单独的形式，干燥纤维和 使交联剂与各自的纤维反应形成纤维内交联键。 然后将个体化纤维素纤维与强碱性溶液和强氧化剂接触以降低气味并增加亮度。 优选地，交联剂是柠檬酸，并且优选约1.0重量％至约12.0重量％的交联剂反应以形成纤维内交联键。 优选地，碱性溶液是氢氧化钠的水溶液，优选将基于干纤维重量的约0.09重量％的氢氧化钠施加到交联纤维上。 优选地，氧化剂是过氧化氢，优选地，基于干纤维重量的约0.04重量％的过氧化氢施加到交联纤维上。 减少的气味个性化的交联纤维可用于各种吸收结构应用。

    Paper press process with high hydrolic pressure
    16.
    发明授权
    Paper press process with high hydrolic pressure 有权

    公开(公告)号：US11492756B2

    公开(公告)日：2022-11-08

    申请号：US16522988

    申请日：2019-07-26

    Applicant: Eastman Chemical Company

    Inventor： Kenny Randolph Parker ,  Charles Stuart Everett ,  Melvin Glenn Mitchell ,  Koushik Ghosh ,  Mounir Izallalen

    IPC: D21H13/06 ,  D21F3/04

    Abstract: The present invention provides compositions comprising cellulose fibers and cellulose ester fibers and wet laid articles made from the compositions, as well as wet laid processes to produce these compositions. More specifically, the present invention provided compositions comprising cellulose fibers and cellulose acetate fibers and wet laid articles made from these compositions as well as wet laid processes to produce these compositions. The present invention also relates to developing a composition, process, wet laid product, or articles exhibiting any one of many desired benefits. Specifically, a wet laid process comprising a process that allows the quantity of water removed from a web passed through press rolls is increased relative to a web made from a 100% cellulose comparative composition.

    Modified fiber from shredded pulp sheets, methods, and systems
    20.
    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.

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