公开(公告)号：US4487656A

公开(公告)日：1984-12-11

申请号：US537876

申请日：1983-09-30

Applicant: G. Graham Allan

Inventor： G. Graham Allan

IPC: D21C3/00 ,  D21C9/10 ,  D21H11/16 ,  D21C9/12 ,  D21C9/14

CPC classification number: D21C9/1036

Abstract: A process for maintaining pulp viscosity while enhancing brightness during the bleaching stage or stages of pulp preparation in the manufacture of paper comprising adding an effective amount of melamine to paper pulp prior to or during the bleaching stage. One example adds melamine to one bleach stage of a chlorine bleaching sequence. One example adds melamine to one bleach stage of a chlorine bleaching sequence.

Abstract translation: 一种在制造纸的漂白阶段或纸浆制备阶段期间保持纸浆粘度同时增强亮度的方法，包括在漂白阶段之前或期间向纸浆中加入有效量的三聚氰胺。 一个例子是将三聚氰胺添加到氯漂白序列的一个漂白阶段。 一个例子是将三聚氰胺添加到氯漂白序列的一个漂白阶段。

公开(公告)号：US3932210A

公开(公告)日：1976-01-13

申请号：US480389

申请日：1974-06-18

Applicant: Migaku Suzuki ,  Atushi Kawai

Inventor： Migaku Suzuki ,  Atushi Kawai

IPC: D04H1/28 ,  D21F11/06 ,  D21H11/16 ,  D21H13/02 ,  D21H17/07 ,  D21H3/12

CPC classification number: D21H5/1254 ,  D21H13/06 ,  D21H17/66 ,  Y10S516/07

Abstract: Non-woven fabric or paper-like material having excellent properties can be produced from fibers comprising hydroxymethyl cellulose xanthate by treating the fibers with a water soluble acid salt of aminoethylethanolamine monostearylamide.

Abstract translation: 通过用氨基乙基乙醇胺单硬脂酰胺的水溶性酸盐处理纤维，可以由包含羟甲基纤维素黄原酸酯的纤维制备具有优异性能的无纺布或纸状材料。

公开(公告)号：US20230131315A1

公开(公告)日：2023-04-27

申请号：US17996941

申请日：2021-05-06

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Katja Lyytikäinen

IPC: D21H19/08 ,  D21H11/16 ,  D21H25/04 ,  B65D65/42

Abstract: The present invention is directed to a process for manufacturing a nano-coated pulp-based substrate comprising the steps of: a) providing a suspension comprising pulp, said pulp having Schopper Riegler value of at least 70°; b) using the suspension of step a) to form a wet web; c) dewatering and/or drying the wet web to form a substrate; d) reducing surface roughness of the substrate; providing a nano-coating on the surface of the substrate obtained in step d) such that a nano-coating having a thickness in the range of from 0.1 nm to 100 nm is provided on the substrate.

公开(公告)号：US11535985B2

公开(公告)日：2022-12-27

申请号：US16916173

申请日：2020-06-30

Applicant: Kemira Oyj

Inventor： Yuping Luo ,  Jennifer Riser ,  Zheng Dang ,  Junhua Chen ,  Ronald Robinson ,  Andrew Pencek ,  Barbara Lukasik

IPC: D21H11/16 ,  D21H17/37 ,  D21H17/56 ,  D21H21/10 ,  D21H23/16 ,  D21H23/76

Abstract: A method for manufacture of paper or board, in which method an inverted solution of cationic polymer is added to the fiber suspension for providing retention enhancement without over-flocculating fiber stock and destruction sheet formation and/or improving drainage and enhancing or at least maintaining strength of paper or board, An inverted solution has a bulk viscosity of 50-150 mPas at 0.2 weight-% cationic polymer concentration and inverted solution comprises cationic polymer obtained by reverse phase emulsion polymerization of a monomer blend comprising non-ionic monomers, 15-50 mol-% cationic monomers, an optionally at most 50 ppm of a crosslinking agent, and a chain transfer agent, and the obtained reverse phase emulsion of cationic polymer is inverted into an aqueous solution.

公开(公告)号：US11473245B2

公开(公告)日：2022-10-18

申请号：US16322522

申请日：2017-08-01

Applicant: DOMTAR PAPER COMPANY, LLC

Inventor： Bruno Marcoccia ,  Harshad Pande ,  Jacob P. John ,  Robert Mason Williams

IPC: D21H23/28 ,  D21H11/16 ,  D21H15/02 ,  D21H17/28 ,  D21H19/54 ,  D21H27/30

Abstract: A paper product having improved printing characteristics and a method of making the paper product. This paper product has a fibrous substrate and top layer of surface enhanced pulp fibers that is integrally coupled to the top surface of the fibrous substrate. The paper product is produced by providing an aqueous slurry formed from a blend of cellulosic fibers and water and at least partially dewatering the aqueous slurry of cellulosic fibers and water to form the fibrous substrate. Subsequently, a surface treatment formed from an aqueous composition of water and surface enhanced pulp fibers is applied to the top surface of the fibrous substrate and thereafter the treated fibrous substrate is dried to form a paper product having enhanced printing characteristics.

公开(公告)号：US11359334B2

公开(公告)日：2022-06-14

申请号：US16591666

申请日：2019-10-03

Applicant: GranBio Intellectual Property Holdings, LLC

Inventor： Theodora Retsina ,  Kimberly Nelson ,  Lee Hill ,  Vesa Pylkkanen ,  Timothy J. Galliford

IPC: D21H11/16 ,  D21H11/02 ,  D21H11/08 ,  D21C1/02 ,  D21C3/04 ,  D21C3/20 ,  D21C9/00 ,  D21H11/18 ,  D21H27/40

Abstract: The present invention provides a pulp product (e.g., paper) comprising cellulose and nanocellulose, wherein the nanocellulose is derived from the cellulose in a mechanical and/or chemical step that is separate from the main pulping process. The pulping process may be thermomechanical pulping or hydrothermal-mechanical pulping, for example. The pulp product is stronger and smoother with the presence of the nanocellulose. The nanocellulose further can function as a retention aid, for a step of forming the pulp product (e.g., in a paper machine). Other embodiments provide a corrugated medium pulp composition comprising cellulose pulp and nanocellulose, wherein the nanocellulose includes cellulose nanofibrils and/or cellulose nanocrystals and the nanocellulose may be hydrophobic. The nanocellulose improves the strength properties of the corrugated medium. In some embodiments, the cellulose pulp is a GreenBox+® pulp and the nanocellulose is derived from the AVAP® process.

公开(公告)号：US20220072761A1

公开(公告)日：2022-03-10

申请号：US17014440

申请日：2020-09-08

Applicant: Sonoco Development Inc.

Inventor： ROBERT THOR VERSLUYS

IPC: B29C51/16 ,  B29C51/04 ,  B29C51/00 ,  B29C51/26 ,  B29C51/20 ,  B29C51/42 ,  B29C51/10 ,  B29B11/14 ,  D21H11/12 ,  D21H11/16

Abstract: The present disclosure is directed to recyclable lined molded fiber articles (e.g., bowls) that provide the necessary performance characteristics for storing frozen and refrigerated foods (acceptable oil resistance, water resistance, and water vapor barrier). The disclosed articles and methods for manufacturing such articles include bonding a thermoformable cellulose-based acetate film to a molded bagasse fiber article to form an impervious liner.

公开(公告)号：US20210207289A1

公开(公告)日：2021-07-08

申请号：US17210618

申请日：2021-03-24

Applicant: DOMTAR PAPER COMPANY, LLC

Inventor： Harshad PANDE ,  Bruno MARCOCCIA

IPC: D01B9/00 ,  D21B1/04 ,  D21D1/26 ,  D21D1/06 ,  D21C9/00 ,  D21D1/20 ,  D21H11/08 ,  D21H11/10 ,  D21H11/16 ,  D02J3/02 ,  D21H15/02 ,  D21H11/00

Abstract: Various embodiments of the present invention relate to surface enhanced pulp fibers, various products incorporating surface enhanced pulp fibers, and methods and systems for producing surface enhanced pulp fibers. Various embodiments of surface enhanced pulp fibers have significantly increased surface areas compared to conventional refined fibers while advantageously minimizing reductions in length following refinement. The surface enhanced pulp fibers can be incorporated into a number of products that might benefit from such properties including, for example, paper products, paperboard products, fiber cement boards, fiber reinforced plastics, fluff pulps, hydrogels, cellulose acetate products, and carboxymethyl cellulose products. In some embodiments, a plurality of surface enhanced pulp fibers have a length weighted average fiber length of at least about 0.3 millimeters and an average hydrodynamic specific surface area of at least about 10 square meters per gram, wherein the number of surface enhanced pulp fibers is at least 12,000 fibers/milligram on an oven-dry basis.

公开(公告)号：US20210189654A1

公开(公告)日：2021-06-24

申请号：US17055159

申请日：2018-05-15

Applicant: Essity Hygiene and Health Aktiebolag

Inventor： Ulrika Husmark ,  Lars-Erik Enarsson ,  Caroline Severinson

IPC: D21H11/16 ,  D21H27/30 ,  D21H23/28 ,  D21H11/08 ,  D21H11/02 ,  D21H23/50 ,  D21H27/00 ,  D21H25/06 ,  D21H23/56

Abstract: Fibrous products having an improved softness are provided, which have beneficial effects on the skin upon use. The fibrous product includes a fibrous material in which this material has at least one of lactic acid or a salt thereof in an amount of, per ply provided, in the range of from about 0.1 to about 15 g/m2, and in some embodiments, in the range of from about 1.0 to about 1.5 g/m2. A water activity of the fibrous product is from about 0.03 to 0.85. The salt of lactic acid may, for example, be sodium lactate, potassium lactate, and/or calcium lactate.

公开(公告)号：US20210062067A1

公开(公告)日：2021-03-04

申请号：US17097207

申请日：2020-11-13

Applicant: Halliburton Energy Services, Inc.

Inventor： William Cecil Pearl, JR. ,  Samuel J. Lewis ,  Thomas Singh Sodhi

IPC: C09K8/467 ,  C09K8/514 ,  C09K8/90 ,  C08L1/02 ,  C09K8/04 ,  D21H11/16 ,  C04B20/10 ,  C04B28/02 ,  C04B20/00 ,  C09K8/035 ,  D21H11/18

Abstract: A variety of systems, methods and compositions are disclosed, including, in one method, a method for well treatment may comprise providing a treatment fluid comprising an aqueous base fluid; and a nanofribril cellulose additive, wherein the nanofribril cellulose additive comprises nanofribril cellulose and a surfactant adsorbed onto a surface of the nanofribril cellulose; and introducing the treatment fluid into a well bore penetrating a subterranean formation. Additional systems, methods and compositions are also disclosed.