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公开(公告)号：US11970820B2
公开(公告)日：2024-04-30
申请号：US17981769
申请日：2022-11-07
发明人： Jonathan Y. Chen
IPC分类号： D21H11/20 , A61L15/28 , C08B16/00 , C08L1/02 , D01G11/00 , D21H11/12 , D21H11/16 , D21H27/00 , B82Y5/00 , B82Y30/00
CPC分类号： D21H11/20 , A61L15/28 , C08B16/00 , C08L1/02 , D01G11/00 , D21H11/12 , D21H11/16 , D21H27/00 , B82Y5/00 , B82Y30/00 , C08L2207/20 , D10B2201/02
摘要： Cellulose materials and methods of making the cellulose materials are described herein. The method can include contacting a cotton fabric with an oxidizing system to obtain an oxidized cotton material and processing the oxidized cotton material to form the cellulose material. The oxidizing system can include an aqueous mixture of a N-oxyl compound and a hypochlorite compound. During oxidation, the p11 of the aqueous mixture can be maintained at from 8.5 to 11. Cellulose products can be formed from the cellulose materials. For example, the cellulose products can be used to form a packaging material, a biomedical device or implant, a drug delivery material, a fiber, a textile material, a template for electronic components, or a separation membrane. Methods of making the cellulose product include dissolving or suspending an active ingredient in a medium comprising the cellulose material.
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公开(公告)号：US20230212341A1
公开(公告)日：2023-07-06
申请号：US18174747
申请日：2023-02-27
IPC分类号： C08F251/02 , B01J20/24 , D21H17/37 , C08B15/00 , D21C9/00 , D01F11/02 , B01J20/26 , B01J20/28 , C08B3/08 , D21H11/20 , D21H21/22 , D21H27/00 , D21H11/16 , D01F2/00
CPC分类号： C08F251/02 , B01J20/24 , B01J20/265 , B01J20/267 , B01J20/28023 , C08B3/08 , C08B15/005 , D01F11/02 , D21C9/005 , D21H11/16 , D21H11/20 , D21H17/37 , D21H21/22 , D21H27/002 , D01F2/00
摘要： 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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公开(公告)号：US20230151547A1
公开(公告)日：2023-05-18
申请号：US17989255
申请日：2022-11-17
申请人： KANBOL, INC
发明人： Miles Leach , Michel McKenzie
摘要： Methods and systems for preparing agricultural residue or other agricultural feedstock for use as a pulp. The method includes providing non-wood agricultural residue (e.g., corn stover) or other agricultural feedstock that includes agricultural fibers, chemically pulping the agricultural fibers in a preliminary alkaline chemical pulping process at a low consistency and at a low temperature to produce partially pulped agricultural fibers, such step including separating lignin and hemicellulose from the partially pulped agricultural fibers, introducing the partially pulped agricultural fibers into a first reactor, wherein the first reactor operates at a low temperature of less than 100° C. (e.g., 65° C.), introducing the agricultural fibers from the first reactor into a second reactor, where the second reactor operates at a low temperature, of less than 100° C. (e.g., 94-96° C.), the second reactor operating at a higher temperature than the first reactor, to produce pulped agricultural fibers.
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公开(公告)号：US20230062813A1
公开(公告)日：2023-03-02
申请号：US17981769
申请日：2022-11-07
发明人： Jonathan Y. CHEN
IPC分类号： D21H11/20 , A61L15/28 , D21H27/00 , D21H11/16 , C08B16/00 , C08L1/02 , D01G11/00 , D21H11/12
摘要： Cellulose materials and methods of making the cellulose materials are described herein. The method can include contacting a cotton fabric with an oxidizing system to obtain an oxidized cotton material and processing the oxidized cotton material to form the cellulose material. The oxidizing system can include an aqueous mixture of a N-oxyl compound and a hypochlorite compound. During oxidation, the p11 of the aqueous mixture can be maintained at from 8.5 to 11. Cellulose products can be formed from the cellulose materials. For example, the cellulose products can be used to form a packaging material, a biomedical device or implant, a drug delivery material, a fiber, a textile material, a template for electronic components, or a separation membrane. Methods of making the cellulose product include dissolving or suspending an active ingredient in a medium comprising the cellulose material.
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公开(公告)号：US20230002972A1
公开(公告)日：2023-01-05
申请号：US17837144
申请日：2022-06-10
IPC分类号： D21H11/16 , D21C1/02 , D21C3/04 , D21C3/20 , D21C9/00 , D21H11/18 , D21H27/40 , D21H11/02 , D21H11/08
摘要： 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.
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公开(公告)号：US11352747B2
公开(公告)日：2022-06-07
申请号：US16383459
申请日：2019-04-12
发明人： Tobias Ziegenbein
摘要： A process for improving high aspect ratio cellulose filament blends comprising the steps of: a) providing a blend of cellulose nano-filaments or blend of cellulose micro-filaments; b) diluting the blend of cellulose nano-filaments or the blend of cellulose micro-filaments to a target consistency; c) fractionating the diluted blend of cellulose nano-filaments or the diluted blend of cellulose micro-filaments from the step c); and, d) collecting the fraction of the diluted blend of cellulose nano-filaments or the diluted blend of cellulose micro-filaments from the step c) having an average length of greater than at least about 25 μm.
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公开(公告)号：US11242652B2
公开(公告)日：2022-02-08
申请号：US16075715
申请日：2017-02-17
申请人： Stora Enso OYJ
发明人： Isto Heiskanen , Esa Saukkonen
IPC分类号： D21H15/00 , D21H11/18 , D21H11/16 , B65D65/38 , B65D85/10 , D21H17/35 , D21H17/67 , D21H17/68 , D21H19/10 , D21H15/02 , D21F11/02 , D21H21/28 , D21H27/10
摘要： A sheet having dead-fold properties, wherein said sheet comprises cellulose fibers whereof at least 75%, preferably at least 90%, or more preferably at least 95% of said cellulose fibers have a fiber length of less than 1 mm, and wherein the tensile strength ratio (MD/CD) of the film is above 1.4, preferably higher than 1.6 and most preferably higher than 1.8.
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公开(公告)号：US11111628B2
公开(公告)日：2021-09-07
申请号：US16933167
申请日：2020-07-20
申请人： GP Cellulose GmbH
摘要： A modified kraft pulp fiber with unique properties is provided. The modified fiber can be a modified bleached kraft fiber that is almost indistinguishable from its conventional counterpart, except that it has a low degree of polymerization (DP). Methods for making the modified fiber and products made from it are also provided. The method can be a one step acidic, iron catalyzed peroxide treatment process that can be incorporated into a single stage of a multi-stage bleaching process. The products can be chemical cellulose feedstocks, microcrystalline cellulose feedstocks, fluff pulps and products made from them.
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公开(公告)号：US10975499B2
公开(公告)日：2021-04-13
申请号：US15225292
申请日：2016-08-01
发明人： Harshad Pande , Bruno Marcoccia
IPC分类号： D21H15/02 , D01B9/00 , D21B1/04 , D21D1/26 , D21D1/06 , D21C9/00 , D21D1/20 , D21H11/08 , D21H11/10 , D21H11/16 , D02J3/02 , D21H11/00
摘要： 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.
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公开(公告)号：US10704165B2
公开(公告)日：2020-07-07
申请号：US15225300
申请日：2016-08-01
发明人： Harshad Pande , Bruno Marcoccia
IPC分类号： D01B9/00 , D21B1/04 , D21D1/26 , D21D1/06 , D21C9/00 , D21D1/20 , D21H11/08 , D21H11/10 , D21H11/16 , D02J3/02 , D21H15/02 , D21H11/00
摘要： 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.
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