公开(公告)号：US12116729B2

公开(公告)日：2024-10-15

申请号：US17596098

申请日：2020-05-29

Applicant: LENZING AKTIENGESELLSCHAFT

Inventor： Richard Herchl ,  Gabriele Schild ,  Christian Weilach

IPC: D21H11/10 ,  D21C1/08 ,  D21C3/06 ,  D21C3/20 ,  D21C5/00 ,  D21C9/10 ,  D21H11/06 ,  D21H11/08 ,  D21H11/14

CPC classification number: D21H11/10 ,  D21C1/08 ,  D21C3/06 ,  D21C3/20 ,  D21C5/005 ,  D21C9/10 ,  D21H11/06 ,  D21H11/08 ,  D21H11/14

Abstract: A method for providing a treated cellulose-comprising mixed starting material (110), in particular a mixed starting material (110) for forming a, in particular regenerated, cellulosic molded body (102) is described. The method comprises: i) providing (10) a first starting material (101a) which comprises a lignocellulosic raw material, ii) providing (1) a second starting material (101b) which comprises a cellulose-containing lignin-free product, iii) mixing (15) the first starting material (101a) and the second starting material (101b) to a mixed starting material (101), and iv) at least partially commonly treating (20) the first starting material (101a) and the second starting material (101b) for obtaining the treated mixed starting material (101), in particular a mixed pulp.

公开(公告)号：US11834793B2

公开(公告)日：2023-12-05

申请号：US16966527

申请日：2019-01-31

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Jukka Kankkunen ,  Anna Nyberg Zetterlund ,  Jan Lif

IPC: D21H23/28 ,  D21H11/08 ,  D21H23/48 ,  D21H23/50 ,  D21H23/52 ,  D21H19/40 ,  D21H19/66 ,  D21H11/18

CPC classification number: D21H23/28 ,  D21H11/18 ,  D21H19/40 ,  D21H19/66 ,  D21H23/48 ,  D21H23/50 ,  D21H23/52

Abstract: The present invention relates to a process for manufacturing a film comprising high amounts of microfibrillated cellulose (MFC), having haptic properties. According to the present invention, a wet web comprising MFC is formed, followed by addition of particles having an average diameter of at least 1 μm to the wet web, followed by dewatering and/or drying. The wet web may be formed for example by wet laid or cast forming methods. The particles may be added to the wet web for example by cast coating or spraying.

公开(公告)号：US20230383471A1

公开(公告)日：2023-11-30

申请号：US18333353

申请日：2023-06-12

Applicant: MERCER INTERNATIONAL INC

Inventor： Tobias Ziegenbein

IPC: D21H27/30 ,  D21H11/08 ,  D21H11/18 ,  D21H15/02 ,  D21H27/00 ,  D21F11/14 ,  D21H11/02 ,  D21H17/44 ,  D21H21/20 ,  B32B29/00

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

Abstract: A differential density absorbent towel paper product comprising at least one absorbent towel paper web is disclosed. The absorbent towel paper web has: (a) from about 20% to about 90% by weight of the dry fiber basis of the absorbent towel paper web of a refined soft wood pulp fiber mixture, (b) pulp fibers selected from the group consisting of hard wood fibers, non-wood fibers, recycled fibers, synthetic polymer fibers, bleached eucalyptus kraft fibers, and combinations thereof and, (c) not more than about 10% by weight moisture. The refined soft wood pulp fiber mixture has: i) from about 18.5% to about 88.5% by weight of soft wood pulp fiber; ii) from about 0.25% to about 5.0% by of cationic strengthening polymer; and, iii) from about 0.05% to about 20% by weight of cellulose nano-filaments.

公开(公告)号：US20230055478A1

公开(公告)日：2023-02-23

申请号：US17903232

申请日：2022-09-06

Applicant: GranBio Intellectual Property Holdings, LLC

Inventor： Theodora RETSINA ,  Kimberly NELSON

IPC: C08L1/02 ,  C09D101/02 ,  C08J9/00 ,  C08J9/36 ,  D21C3/04 ,  C08B37/00 ,  C08H8/00 ,  C09D197/00 ,  D21C9/00 ,  D21C11/00 ,  D21H11/08 ,  D21H19/34

Abstract: An oleophilic and hydrophobic nanocellulose material is disclosed herein, for nanocellulose sponges and other applications. The oleophilic and hydrophobic nanocellulose material comprises lignin-coated cellulose nanofibrils and/or lignin-coated cellulose nanocrystals. In various embodiments, the nanocellulose material is in the form of a 2D coating or layer, or a 3D object (e.g., foam or aerogel). The nanocellulose material may be disposed onto a scaffold. A process is provided for producing an oleophilic and hydrophobic nanocellulose object, comprising fractionating a biomass feedstock with an acid, a solvent for lignin, and water, to generate cellulose-rich solids and a lignin-containing liquor; mechanically treating the cellulose-rich solids to form cellulose fibrils and/or cellulose crystals; generating a nanocellulose object from the intermediate nanocellulose material; exposing the nanocellulose object to the lignin-containing liquor to allow lignin to deposit onto a surface of the nanocellulose object; and recovering the oleophilic and hydrophobic nanocellulose object.

公开(公告)号：US11306433B2

公开(公告)日：2022-04-19

申请号：US16522931

申请日：2019-07-26

Applicant: Eastman Chemical Company

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

IPC: D21C9/08 ,  D21H11/14 ,  D21H11/04 ,  D21H11/06 ,  D21H11/08 ,  D21H13/06

Abstract: A composition and process for making the composition by co-refining: fibrillated virgin cellulose fibers, waste/recycle cellulose fibers, or both; co-refined cellulose ester (CE) staple fibers having a denier per filament (DPF) of less than 3 and the weight percent of CE staple fibers is less than 30 wt. %, based on the weight of CE staple fibers and said cellulose fibers; and water. The composition can be co-refined to obtain lower Canadian standard freeness yet improved drainage and wet laid products having good tensile strength, air permeability, stiffness, burst strength, and bulk.

公开(公告)号：US11299853B2

公开(公告)日：2022-04-12

申请号：US16334371

申请日：2017-09-20

Applicant: Hans Hoglund ,  Gunilla Pettersson ,  Sven Norgren ,  Per Engstrand

Inventor： Hans Hoglund ,  Gunilla Pettersson ,  Sven Norgren ,  Per Engstrand

IPC: D21F3/02 ,  D21H11/02 ,  D21H11/08 ,  D21H11/10

Abstract: A method of producing a paper or paperboard product having at least one ply comprising high yield pulp (HYP), comprising the steps of: —providing a furnish comprising at least 50% of high yield pulp (HYP) of a total pulp content in said furnish, said high yield pulp being produced with a wood yield above 85%; —dewatering the furnish to form a moist web and pressing said moist web to a dry solids content of at least 40-70%; and —densifying the moist web to a density above 600 kg/m3 in a press nip of a paper machine at a temperature above a softening temperature of water-saturated lignin comprised in said high yield pulp to provide a paper or paperboard product, containing at least 30% high yield pulp (HYP) of a total pulp content of said product.

公开(公告)号：US20210180252A1

公开(公告)日：2021-06-17

申请号：US17183623

申请日：2021-02-24

Applicant: WestRock MWV, LLC

Inventor： Humphrey J. Moynihan ,  Peter W. Hart ,  Nichole Kilgore ,  John D. DeJarnette

IPC: D21D1/20 ,  D01B9/00 ,  D21H11/08 ,  D21H11/10

Abstract: A fiber blend includes a first amount of wood pulp fibers refined in an amount of at least about 150 kWh per metric ton of gross refining energy, and a second amount of wood pulp fibers refined in an amount of at most about 10 kWh per metric ton of gross refining energy.

公开(公告)号：US10914039B2

公开(公告)日：2021-02-09

申请号：US16699918

申请日：2019-12-02

Applicant: Kimberly-Clark Worldwide, Inc.

Inventor： Thomas Gerard Shannon ,  Richard Louis Underhill ,  Kevin Leon LaBerge ,  John Matthew Reiser ,  Gilbert Darrell Gafford

IPC: D21H27/00 ,  D21H27/30 ,  D21H11/02 ,  D21H11/08 ,  D21H11/12 ,  D21H27/38 ,  D21H11/10

Abstract: The present invention provides soft, durable and bulky tissue products comprising non-wood fibers and more particularly hesperaloe fiber. The inventors have discovered that high yield hesperaloe pulp fiber, when incorporated in amounts of at least about 5 percent by weight of the tissue product, produces products having a GMT less than about 1000 g/3″ and a GM Slope less than about 7.0 kg. At the foregoing tensile strengths and modulus the tissue products of the present invention are also generally soft, such as having a Stiffness Index less than about 10.0, and more preferably less than about 9.0, such as from about 7.0 to about 9.0.

公开(公告)号：US20200332472A1

公开(公告)日：2020-10-22

申请号：US16865950

申请日：2020-05-04

Applicant: Mercer International Inc.

Inventor： Tobias Ziegenbein

IPC: D21H27/30 ,  D21H11/08 ,  D21H11/18 ,  D21H15/02 ,  D21H27/00 ,  D21F11/14 ,  D21H11/02 ,  D21H17/44 ,  D21H21/20 ,  B32B29/00

Abstract: A differential density paper product comprising at least one paper web is disclosed. The paper product has: (a) from about 20% to about 90% by weight of the dry fiber basis of the paper product of a refined soft wood pulp fiber mixture, (b) pulp fibers selected from the group consisting of hard wood fibers, non-wood fibers, recycled fibers, synthetic polymer fibers, bleached eucalyptus kraft fibers, and combinations thereof; and, (c) not more than about 10% by weight moisture.

公开(公告)号：US20200080265A1

公开(公告)日：2020-03-12

申请号：US16674336

申请日：2019-11-05

Applicant: GPCP IP Holdings LLC

Inventor： Jeffrey A. Lee

IPC: D21H27/00 ,  D21F11/00 ,  D21H11/04 ,  D21H11/06 ,  D21H11/08 ,  D21H11/14 ,  D21F11/14

Abstract: Tissue papers and methods of making are disclosed herein. In one aspect, a tissue paper is substantially free of a chemical debonder and has a geometric mean tensile (GMT) in a range between about 500 and about 5,000 g/3 inches (g/3 in.) and a caliper in a range between about 50 and about 350 mils/8 sheets.