With Chemical Or Physical Modification Of Liberated Fiber Patents (Class 162/9)
  • Patent number: 10927505
    Abstract: The present invention relates to crystalline and stable amorphous CaCO3 precipitated on lignocellulosic fibers.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: February 23, 2021
    Assignee: Stora Enso OYJ
    Inventors: Kaj Backfolk, Isto Heiskanen, Teija Laukala
  • Patent number: 10900177
    Abstract: This disclosure relates to improved packaging materials containing oxidized cellulose. More particularly, this disclosure relates to improved packaging materials containing oxidized cellulose exhibiting one or more of improved odor control and/or improved antimicrobial properties. This disclosure further relates to the use of oxidized cellulose in packaging materials as an anti-counterfeiting agent, and methods of testing for the same.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: January 26, 2021
    Assignee: GP CELLULOSE GMBH
    Inventors: Charles E. Courchene, Ernest R. Fish, Arthur J. Nonni, Mechelli R. Campbell
  • Patent number: 10822727
    Abstract: The method disclosed relates to the production of paper yarn from cellulose-containing plant species, in the textile sector, and particularly relates to obtaining a paper yarn by a wet spinning method using high or low purity cellulose raw material isolated from the wild plant species of Calluna Vulgaris.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: November 3, 2020
    Inventor: Mustafa Soylu
  • Patent number: 10646881
    Abstract: A system and method for separating and collecting cannabis through separates cannabis into plant material, chaff, seeds, and kief; and then collects cannabis byproducts based on size, shape, and weight through separators, including, a screw conveyor, a mechanical vibrator, an ultrasonic mechanism, and a series of stacked classifiers. The method includes: loading unprocessed cannabis into an intake chamber; grinding the cannabis to reduce the size of plant material; carrying the cannabis upwardly through an inclined tube; delivering the cannabis to an elevated terminus at the upper end of the tube; passing the cannabis through stacked classifiers; shaking the cannabis to dislodge oil glands, resin trichomes, and kief from plant material; directing high frequency sound waves towards the cannabis to dislodge oil glands, resin trichomes, and kief from the plant material; and collecting herbaceous plant material, chaff, seeds, oil glands, and kief residue in separate containers.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: May 12, 2020
    Inventor: William Stacy Page
  • Patent number: 10640899
    Abstract: The present invention is directed to a method of increasing the brightness of non-wood fibers. The method comprises forming a mixture of non-wood fibers and exposing the mixture to a brightening agent, the brightening agent being a permanganate compound, an acid, or a combination of the permanganate compound and the acid. The resulting brightened fibers have a brightness greater than the fibers of the mixture before exposure as measured by MacBeth UV-C standard.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: May 5, 2020
    Assignee: GPCP IP Holdings LLC
    Inventor: Jeffrey A. Lee
  • Patent number: 10385140
    Abstract: Cellulose-containing compositions and method of making same are disclosed. The compositions comprise a cellulose product comprising a type-I cellulose, a type-II cellulose, amorphous cellulose, or a combination thereof. Further, methods are disclosed for making these compositions and for further hydrolyzing these compositions. Additionally, uses for the cellulose-containing compositions are disclosed.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: August 20, 2019
    Assignee: Renmatix, Inc.
    Inventors: Ewellyn A. Capanema, Mikhail Y. Balakshin, Patrick David Fitzgibbon, Matyas Kosa, Todd Michael McLarty, Charles Sebastian Sanderson
  • Patent number: 10266989
    Abstract: A process for producing cellulosic fiber with a high curl index is disclosed. The process can include mechanically treating and chemically crosslinking kraft pulp. The mechanical treatment of the pulp can include convolving and mechanically treating a pulp at in a plug screw and steam tube at temperatures above 100° C. and pressures above 3 bar. The mechanically treated pulp can be crosslinked with a crosslinking agent. The product fiber can exhibit a curl index of greater than 0.35, and can be at least 50% higher than the initial curl of the starting pulp material.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: April 23, 2019
    Assignee: Resolute FP US Inc.
    Inventors: Shaune Hanley, Mark Andrews, Frank Charbonneau, Gary Cothran, Reza Amiri, Rafik Allem, Waleed Wafa Al Dajani
  • Patent number: 10155735
    Abstract: Methods and compositions are provided for synthesizing ionic liquids from lignin. Methods and compositions are also provided for treating lignin with ionic liquids.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: December 18, 2018
    Assignees: The Regents of the University of California, National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Aaron Socha, Seema Singh, Blake A. Simmons, Maxime Bergeron
  • Patent number: 9969816
    Abstract: A method for catalytic oxidation of cellulose using a heterocyclic nitroxyl radical as catalyst and main oxidant acting as oxygen source comprises, before the catalytic oxidation of the cellulose, pretreatment of the cellulose—in an alkaline pretreatment step, where the cellulose is treated in alkaline solution having hydroxide concentration of above 0.3 M, and—in a washing step, where the cellulose treated in the alkaline solution is washed to lower the pH.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: May 15, 2018
    Assignee: UPM-KYMMENE CORPORATION
    Inventors: Markus Nuopponen, Timo Paakkonen, Raili Ponni, Tapani Vuorinen
  • Patent number: 9951444
    Abstract: A method of fabricating a continuous nanofiber is described. The method includes preparing a solution of one or more polymers and one or more solvents and electrospinning the solution by discharging the solution through one or more liquid jets into an electric field to yield one or more continuous nanofibers. The electrospinning process (i) highly orients one or more polymer chains in the one or more continuous nanofibers along a fiber axis of the one or more continuous nanofibers, and (ii) suppresses polymer crystallization in the one or more continuous nanofibers. The one or more continuous nanofibers can have diameters below about 250 nanometers and exhibit an increase in fiber strength and modulus while maintaining strain at failure, resulting in an increase in fiber toughness.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: April 24, 2018
    Assignee: NUtech Ventures
    Inventor: Yuris Dzenis
  • Patent number: 9765044
    Abstract: Methods and compositions are provided for synthesizing ionic liquids from lignin derived compounds comprising: contacting a starting material comprising lignin with a depolymerization agent to depolymerize the lignin and form a mixture of aldehyde containing compounds; contacting the mixture of aldehyde containing compounds with an amine under conditions suitable to convert the mixture of aldehyde containing compounds to a mixture of amine containing compounds; and contacting the mixture of amine containing compounds with an acid under conditions suitable to form an ammonium salt, thereby preparing the ionic liquid.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: September 19, 2017
    Assignees: The Regents of the University of California, Sandia Corporation
    Inventors: Aaron Socha, Seema Singh, Blake A. Simmons, Maxime Bergeron
  • Patent number: 9512563
    Abstract: 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.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: December 6, 2016
    Assignee: GP Cellulose GmbH
    Inventors: Arthur James Nonni, Charles Edward Courchene, Darold Tippey
  • Patent number: 9512237
    Abstract: A method of inhibiting the growth of bacteria in an absorbent device by using kraft pulp fiber subjected to an acidic, catalyzed peroxide treatment process incorporated into a single stage of a multi-stage bleaching process.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: December 6, 2016
    Assignee: GP Cellulose GmbH
    Inventors: Arthur James Nonni, Charles E. Courchene, Christopher Michael Slone
  • Patent number: 9499687
    Abstract: Provided is a polypropylene resin composition. The polypropylene resin composition includes: from about 20 to about 80 parts by weight of a polypropylene resin; from about 1 to about 35 parts by weight of an amine-based kenaf master batch; and from about 1 to about 25 parts by weight of a vinyl-based acetal compatibilizer. Also disclosed is the polypropylene resin composition which is used for vehicle interior and exterior materials, thereby improving physical properties such as low-temperature properties and tensile strength and providing superior resistance against damages.
    Type: Grant
    Filed: November 29, 2014
    Date of Patent: November 22, 2016
    Assignees: Hyundai Motor Company, Hyundai Engineering Plastics Co., Ltd.
    Inventors: Oh-Deok Kwon, Dae-Sik Kim, Beom-Ho Kim, Hyeong-Geun Oh, Tae-Hyung Kim
  • Patent number: 9499941
    Abstract: Novel pulps comprising conventional papermaking and macroalgae fibers are provided. By combining conventional papermaking fibers with never-dried macroalgae fibers, rather than dried macroalgae fibers, the disclosure provides pulp sheets having improved characteristics such as tensile and burst strength, with minimal deterioration in freeness.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: November 22, 2016
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Bo Shi, Michael William Veith, Candace Dyan Krautkramer, Thomas Gerard Shannon
  • Patent number: 9485917
    Abstract: The composite material is comprised of a substrate of discrete particles and a network of interconnected mycelia cells bonding the discrete particles together. The composite material is made by inoculating a substrate of discrete particles and a nutrient material with a preselected fungus. The fungus digests the nutrient material over a period of time sufficient to grow hyphae and to allow the hyphae to form a network of interconnected mycelia cells through and around the discrete particles thereby bonding the discrete particles together to form a self-supporting composite material. In another embodiment, the fungus is allowed to grow as a fruiting body out of the substrate and within an enclosure to completely fill the enclosure to form a self-supporting structure.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: November 8, 2016
    Assignee: ECOVATIVE DESIGN, LLC
    Inventors: Eben Bayer, Gavin McIntyre
  • Patent number: 9416493
    Abstract: The invention relates to a method for processing chemically modified fibril cellulose. The method includes introducing chemically modified fibril cellulose material to a thermal drying device including a belt in such a way that the fibril cellulose material forms at least one bar onto the belt, and dewatering the chemically modified fibril cellulose material on the belt using heated air flow having a temperature of at least 40 ° C. in order to concentrate and/or dry the chemically modified fibril cellulose material in such a way that the dry solids content of the fibril cellulose material after the thermal drying device is at least 10%. In addition, this invention relates to a thermal drying device, a system for processing chemically modified fibril cellulose, a method and a system for redispersing the fibril cellulose, and a fibril cellulose material.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: August 16, 2016
    Assignee: UPM-KYMMENE CORPORATION
    Inventors: Kari Hillebrand, Markus Nuopponen, Martina Lille, Juha Tamper
  • Patent number: 9410285
    Abstract: In a method for catalytic oxidation of cellulose a heterocyclic nitroxyl radical is used as catalyst, hypochlorite is used as main oxidant acting as oxygen source, and a tertiary amine or chlorine dioxide as an activator of the heterocyclic nitroxyl radical.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: August 9, 2016
    Assignee: UPM-KYMMENE CORPORATION
    Inventors: Tapani Vuorinen, Timo Pääkkönen, Markus Nuopponen
  • Patent number: 9328459
    Abstract: Carboxylated, mercerized cellulose fiber having at least 12 meq/100 g of carboxyl substitution at the C-6 position of the anhydroglucose units, which includes at least 20% cellulose II, may be produced by catalytically carboxylating mercerized cellulose fiber in at least two catalytic carboxylation stages in a continuous series in which the pH is adjusted, and a primary oxoammonium salt catalyst (or precursor thereof) and secondary oxidant is added, at the beginning of each stage. Optionally, the carboxylated, mercerized cellulose may be made substantially free of aldehyde groups by means of a stabilizing step following the final carboxylation stage, in which aldehyde groups present in the fibers are converted to carboxyl groups.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: May 3, 2016
    Assignee: Weyerhaeuser NR Company
    Inventor: S. Ananda Weerawarna
  • Patent number: 9321004
    Abstract: The invention comprises an absorbent composition and process for purification of gaseous mixtures. The composition comprises a mixture of a physical absorption solvent and an ionic liquid. It was found that the mixtures provided improved absorption of a gas component, such as carbon dioxide, when compared physical absorption solvents.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: April 26, 2016
    Assignee: UOP LLC
    Inventors: Erin M. Broderick, Alakananda Bhattacharyya
  • Patent number: 9175442
    Abstract: The present invention relates to a process for manufacturing coated substrates by providing a substrate, providing at least one mineral material, providing a polysaccharide material comprising one or more polysaccharides, coating the substrate with the at least one mineral material, and coating the resulting pre-coat layer of mineral material with the gel comprising one or more polysaccharides, as well as the coated substrate obtained by this process and its use.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: November 3, 2015
    Assignee: Omya International
    Inventors: Patrick A. C. Gane, Catherine Jean Ridgway, Michel Schenker
  • Patent number: 9139662
    Abstract: Cellulose nanofibers are produced by means of a method comprising a step (A) of oxidizing a cellulosic starting material in the presence of an N-oxyl compound and a step (B) of forming the oxidized cellulosic starting material into nanofibers by defibrating the oxidized cellulosic starting material, and a step (C) of performing at least one selected from the following steps: a step (C-1) of treating the cellulosic starting material in water having a hydroxide ion concentration of 0.75 to 3.75 mol/L prior to performing the step (A); and a step (C-2) of subjecting the oxidized cellulosic starting material obtained from the step (A) to hydrolysis in an alkaline solution having a pH between 8 and 14 after performing the step (A) and prior to performing the step (B).
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: September 22, 2015
    Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Shiho Tsuji, Masahiko Fukazawa, Shoichi Miyawaki, Tomoaki Koyanagi
  • Patent number: 9051689
    Abstract: The invention relates to a method for precipitating calcium carbonate, in which method calcium hydroxide is introduced to a fiber suspension containing cellulose-containing fibers, the calcium hydroxide is allowed to attach onto the surfaces of fibers for a pre-determined time, and the aqueous suspension of calcium hydroxide and fibers is brought into contact with carbon dioxide for precipitating the calcium carbonate. The invention also relates to a corresponding system for precipitating calcium carbonate in connection with cellulose-containing fibers. In addition, the invention relates to a fibrous product, which comprises pulp material produced by said method and comprising calcium carbonate.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: June 9, 2015
    Assignee: UPM-KYMMENE CORPORATION
    Inventor: Paivi Solismaa
  • Publication number: 20150144279
    Abstract: A method for preparing aqueous furnish to be used in paper or paper board manufacturing. Filler and/or fibers are treated with cationic polyelectrolyte and nanofibrillated cellulose. The strength of the paper and the retention of the fillers in paper can be improved. A furnish prepared by a method, and a paper or a paper board manufactured from the furnish.
    Type: Application
    Filed: December 17, 2014
    Publication date: May 28, 2015
    Inventors: Janne Laine, Monika Österberg, Delphine Miquel, Leila Pohjola, Irmeli Sinisalo, Harri Kosonen
  • Patent number: 9017514
    Abstract: Method for production of cellulose and hemicellulose fibers from lignocellulose biomass obtained from sugarcane leaves and buds by applying a process comprising the stages of: a) Diminishing the particle size of the lignocellulose biomass to a range between 3 and 15 mm, b) Subjecting the product obtained to treatment with one or more solvents and/or a mixture of specific catalysts, c) Carry out sudden decompression to an atmospheric pressure, d) Collecting the pretreated material in a cyclone, e) Optionally separating the liquid and solid fractions through washing and filterung f) Optionally, treating the solid fraction in a reactor with a mixture of ethanol and chlorine dioxide, d) Wash the product obtained to achieve cellulose efficiency above 50% and of lignin of 5 to 7%, fiber lengtht in a range to 1,5 to 2,7 mm, breaking length (km) of 7,0 -8,9, Burst index (kPam2/g) of 4,5-7,2 and Tear index (mNm2/g) of 8,2-8, The obtained high-resistance cellulose and hemicellulose is especially suitable for the paper
    Type: Grant
    Filed: July 4, 2012
    Date of Patent: April 28, 2015
    Assignee: Universidad del Valle
    Inventor: Jorge Humberto Borrero
  • Publication number: 20150101769
    Abstract: A method for preparing aqueous furnish to be used in paper or paper board manufacturing. Filler and/or fibers are treated with cationic polyelectrolyte and nanofibrillated cellulose. The strength of the paper and the retention of the fillers in paper can be improved. A furnish prepared by a method, and a paper or a paper board manufactured from the furnish.
    Type: Application
    Filed: December 17, 2014
    Publication date: April 16, 2015
    Inventors: Janne LAINE, Monika Österberg, Delphine Miquel, Leila Pohjola, Irmeli Sinisalo, Harri Kosonen
  • Publication number: 20150101770
    Abstract: A method for preparing aqueous furnish to be used in paper or paper board manufacturing. Filler and/or fibers are treated with cationic polyelectrolyte and nanofibrillated cellulose. The strength of the paper and the retention of the fillers in paper can be improved. A furnish prepared by a method, and a paper or a paper board manufactured from the furnish.
    Type: Application
    Filed: December 17, 2014
    Publication date: April 16, 2015
    Inventors: Janne Laine, Monika Österberg, Delphine Miquel, Leila Pohjola, Imeli Sinisalo, Harri Kosonen
  • Publication number: 20150090412
    Abstract: A method for producing micro fibrillated cellulosic material from pulp in which a pulp feed material is pre-treated by passing through a high consistency refiner a single time, followed by dilution and multiple passes through low consistency refiners.
    Type: Application
    Filed: October 10, 2014
    Publication date: April 2, 2015
    Applicant: ANDRITZ INC.
    Inventors: Marc SABOURIN, Antti Luukkonen
  • Patent number: 8992728
    Abstract: The cellulose nanofiber production method of the present invention comprises an oxidation treatment step for oxidizing native cellulose in a neutral or acidic reaction solution containing an N-oxyl compound and an oxidizing agent that oxidizes aldehyde groups, and a dispersion step for dispersing the native cellulose in a medium following the oxidation treatment step. According to the production method of the present invention, a cellulose nanofiber is provided that has long fibers and demonstrates high strength.
    Type: Grant
    Filed: November 26, 2008
    Date of Patent: March 31, 2015
    Assignee: The University of Tokyo
    Inventors: Akira Isogai, Tsuguyuki Saito
  • Patent number: 8945345
    Abstract: A method for preparing aqueous furnish to be used in paper or paper board manufacturing. Filler and/or fibers are treated with cationic polyelectrolyte and nanofibrillated cellulose. A furnish and a paper or a paper board.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: February 3, 2015
    Assignee: UPM-Kymmene Corporation
    Inventors: Janne Laine, Monika Österberg, Miquel Delphine, Leila Pohjola, Irmeli Sinisalo, Harri Kosonen
  • Patent number: 8945346
    Abstract: Described herein is nanocellulose produced by introducing a mixture of cellulose based fiber raw material and water through a refining gap, having a width smaller than 0.1 mm. In the refining gap, the fiber raw material is subjected to processing forces varying in the direction of introducing said mixture, by means of refining zones provided in the gap one after each other in the feeding direction, whereby the refining surfaces differ in surface patterning and/or surface roughness. The mixture of fiber raw material and water is guided past the refining surfaces in the feeding direction to different locations in the refining zone by by-pass channels provided in the stator. The width of the refining gap is maintained by the combined effect of the feeding pressure of the mixture of fiber raw material and water fed into the refining gap and the axial force of the rotor.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: February 3, 2015
    Assignee: Upm-Kymmene Corporation
    Inventors: Tomas Bjoerkqvist, Timo Koskinen, Markus Nuopponen, Annikki Vehniaeinen, Sirkka Gustafsson
  • Patent number: 8940132
    Abstract: The present invention relates to a process for the manufacture of structural hybrid thermoplastic composites where organic and inorganic fibers are well dispersed in a thermoplastic matrix. The process comprises defibrillating the organic fibers with or without the presence of surface active agents using a mixer at a high shear and at a temperature lower than the decomposition temperature of organic fibers and melting point of the surface active agents to separate the hydrogen bonded fibers and generate microfibers, followed by blending and dispersion of the organic fibers in the thermoplastic matrix to produce a fiber composite, followed by further blending and dispersion of the fiber composite with inorganic fibers at a low shear to get the moldable hybrid composite, followed by extrusion, injection or compression-injection molding. Low shear mixing maintains the inorganic fiber length.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: January 27, 2015
    Inventors: Mohini M. Sain, Suhara Panthapulakkal, Shiang F. Law
  • Patent number: 8940134
    Abstract: Inorganic fiber paper including bio-soluble inorganic fibers which have been subjected to a heat treatment and a binder. A method for producing inorganic fiber paper including: the first step of subjecting amorphous bio-soluble inorganic fibers to a heat treatment; and the second step of making paper comprising the heat-treated bio-soluble inorganic fibers and a binder. Equipment for heating and/or thermal insulation which includes the inorganic fiber paper.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: January 27, 2015
    Assignee: Nichias Corporation
    Inventors: Tetsuya Ishihara, Tetsuya Mihara, Ken Yonaiyama, Tomohiko Kishiki
  • Patent number: 8936697
    Abstract: A process for producing a water-absorbent high-porosity fibrous matrix from lignocellulosic raw materials, comprising wet mechanical processing of the raw material, drying, and then dry mechanical processing the fibers to provide a fibrous matrix is provided. The high-porosity fibrous matrix and absorbent articles prepared therefrom are also provided.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: January 20, 2015
    Assignee: Sustainable Health Enterprises
    Inventors: Elizabeth Scharpf, Liying Huang, Hannah Brice, Joshua Velson, Sina Salehi Omran, Jeffrey Zhou, Rachel B. Licht, Clark K. Colton, William H. Dalzell
  • Patent number: 8906198
    Abstract: A method for producing micro fibrillated cellulosic material from pulp where multiple passes through a medium consistency refiner are made either singularly or in combination with low consistency refiners and high consistency refiners.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: December 9, 2014
    Assignee: Andritz Inc.
    Inventors: Marc Sabourin, Antti Luukkonen
  • Patent number: 8871053
    Abstract: A fire resistant fluff pulp web made from a fluff pulp web, a fire retardant component present in and/or on the fluff pulp, and a fire retardant distributing surfactant which distributes the fire retardant component in and/or on the fluff pulp web in a manner so that the fluff pulp web passes one or more fire resistance tests. Also, a process for preparing these fire resistant fluff pulp webs, as well as for treating outer fibrous layers comprising an air-laid mixture of these fire resistant fluff pulp fibers and bicomponent fibers with up to about 5% additional fire retardant and which are used in fire resistant air-laid fibrous structures useful in upholstery, cushions, mattress ticking, panel fabric, padding, bedding, insulation, materials for parts in devices and appliances, etc.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: October 28, 2014
    Assignee: International Paper Company
    Inventors: James E. Sealey, Brent A. Fields
  • Patent number: 8865318
    Abstract: A composite wood product containing acetylated wood elements characterized by an average value in thickness swelling not exceeding 5% after subjection to 25 wet-dry/freeze-thaw cycles as described in Table II. Alternative characterizations include moduli of elasticity and rupture, and bending strength. A two stage process for the acetylation of wood elements is also described.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: October 21, 2014
    Assignee: Titan Wood Limited
    Inventors: Michel Maes, Beno Pol
  • Publication number: 20140290882
    Abstract: Carboxylated, mercerized cellulose fiber having at least 12 meq/100 g of carboxyl substitution at the C-6 position of the anhydroglucose units, which includes at least 20% cellulose II, may be produced by catalytically carboxylating mercerized cellulose fiber in at least two catalytic carboxylation stages in a continuous series in which the pH is adjusted, and a primary oxoammonium salt catalyst (or precursor thereof) and secondary oxidant is added, at the beginning of each stage. Optionally, the carboxylated, mercerized cellulose may be made substantially free of aldehyde groups by means of a stabilizing step following the final carboxylation stage, in which aldehyde groups present in the fibers are converted to carboxyl groups.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 2, 2014
    Applicant: WEYERHAEUSER NR COMPANY
    Inventor: S. Ananda Weerawarna
  • Patent number: 8809616
    Abstract: The present invention relates to compositions containing stabilized and/or activated urease inhibitors, as well as methods of making and using the same.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: August 19, 2014
    Assignee: International Paper Company
    Inventors: Zheng Tan, Gopal C. Goyal, Linnea J. Shaver
  • Publication number: 20140209259
    Abstract: A process using a multicomponent enzyme preparation to treat screened once refined pulps and reduces the specific energy consumption and/or increasing production while maintaining or increasing handsheet physical properties. The enzyme preparation has a major endoglucanase activity, a significant mannanase activity and a relatively small cellobiohydrolase activity. This enzyme mixture is prepared from a genetically modified strain of Trichoderma reseii.
    Type: Application
    Filed: January 31, 2013
    Publication date: July 31, 2014
    Applicant: UNIVERSITY OF NEW BRUNSWICK
    Inventors: Kecheng LI, Andre PELLETIER, Yu ZHAO
  • Patent number: 8778134
    Abstract: A process for treating cellulosic fibers comprises mechanically pre-treating the fibers followed by treating the fibers with an enzyme and thereafter mixing the fibers with a solution comprising an alkali metal hydroxide followed by mechanically treating the fibers to form microfibrillated cellulose. In this way it is possible to produce microfibrillated cellulose (MFC) in an improved and energy efficient way.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: July 15, 2014
    Assignee: Stora Enso OYJ
    Inventors: Marianna Vehvilainen, Taina Kamppuri, Maarit Peltola, Ali Harlin, Pertti Nousiainen
  • Patent number: 8771463
    Abstract: An object of the present invention is to provide a cellulose fiber assembly and a cellulose fiber composite, each having low coloration. The present invention is directed to a method for preparing a fibrillated cellulose fiber assembly, in which the cellulose fiber raw materials are subjected to a fibrillation treatment and a reduction treatment. The present invention provides a method for preparing a cellulose fiber assembly, comprising a fibrillation step of fibrillating cellulose fiber raw materials to obtain fibrillated cellulose fibers, an assembly preparation step of obtaining a cellulose fiber assembly using the fibrillated cellulose fibers, and a step of carrying out a reduction treatment. Further, the present invention provides a cellulose fiber composite comprising the prepared cellulose fiber assembly and a matrix material.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: July 8, 2014
    Assignee: Oji Holdings Corporation
    Inventors: Tomokazu Umemoto, Hideko Akai, Yasutomo Noishiki, Go Banzashi
  • Publication number: 20140166220
    Abstract: Method for production of cellulose and hemicellulose fibers from lignocellulose biomass obtained from sugarcane leaves and buds by applying a process comprising the stages of: a) Diminishing the particle size of the lignocellulose biomass to a range between 3 and 15 mm, b) Subjecting the product obtained to treatment with one or more solvents and/or a mixture of specific catalysts, c) Carry out sudden decompression to an atmospheric pressure, d) Collecting the pretreated material in a cyclone, e) Optionally separating the liquid and solid fractions through washing and filterung f) Optionally, treating the solid fraction in a reactor with a mixture of ethanol and chlorine dioxide, d) Wash the product obtained to achieve cellulose efficiency above 50% and of lignin of 5 to 7%, fiber lengtht in a range to 1.5 to 2.7 mm, breaking length (km) of 7.0 -8.9, Burst index (kPam2/g) of 4.5-7.2 and Tear index (mNm2/g) of 8.
    Type: Application
    Filed: July 4, 2012
    Publication date: June 19, 2014
    Applicant: UNIVERSIDAD DEL VALLE
    Inventor: Jorge Humberto Borrero
  • Patent number: 8728272
    Abstract: Although a microfibrillated cellulose has been conventionally added to a resin molded article for the purpose of improving the properties of resin such as strength, it is only possible to achieve the same level of strength as that of the resin itself. The object is to provide a resin molded article of greater strength. A molded article can be produced by blending resin with a microfibrillated cellulose having a type-II crystalline structure produced by treating a microfibrillated cellulose with an alkali solution. The molded article can be largely increased in tensile strength or flexural strength, tensile strain at break or flexural strain at break, and fracture toughness (work-of-fracture) compared to a molded article produced with resin containing a conventional microfibrillated cellulose.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: May 20, 2014
    Assignee: Kyoto University
    Inventors: Hiroyuki Yano, Antonio Norio Nakagaito
  • Publication number: 20140124150
    Abstract: A method for producing micro fibrillated cellulosic material from pulp where multiple passes through a medium consistency refiner are made either singularly or in combination with low consistency refiners and high consistency refiners.
    Type: Application
    Filed: October 10, 2013
    Publication date: May 8, 2014
    Applicant: Andritz Inc.
    Inventors: Marc SABOURIN, Antti Luukkonen
  • Patent number: 8715462
    Abstract: Methods and apparatus are provided for exploiting coated paper products such as coated paper cups. End products include biofuels that have a high energy density. The biofuels may be mixed with coal or other fuels and have good binding characteristics. In some embodiments, useful chemicals such as HMF are produced. The methods involve heat treatment at relatively mild temperatures and pressures under acidic conditions.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: May 6, 2014
    Inventor: Alexis Fosse Mackintosh
  • Patent number: 8685206
    Abstract: A fire resistant fluff pulp web made from a fluff pulp web, a fire retardant component present in and/or on the fluff pulp, and a fire retardant distributing surfactant which distributes the fire retardant component in and/or on the fluff pulp web in a manner so that the fluff pulp web passes one or more fire resistance tests. Also, a process for preparing these fire resistant fluff pulp webs, as well as for treating outer fibrous layers comprising an air-laid mixture of these fire resistant fluff pulp fibers and bicomponent fibers with up to about 5% additional fire retardant and which are used in fire resistant air-laid fibrous structures useful in upholstery, cushions, mattress ticking, panel fabric, padding, bedding, insulation, materials for parts in devices and appliances, etc.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: April 1, 2014
    Assignee: International Paper Company
    Inventors: James E. Sealey, Brent A. Fields
  • Patent number: 8679292
    Abstract: A method is conceived for producing hydrophobic lignocellulosics based on the graft copolymerisation of vinyl-type monomers onto the lignocellulosic backbone initiated by a redox couple initiator in aqueous medium. The green modification process can be carried out on any lignocellulosic material, for example, chemical, chemi-thermomechanical or thermo-mechanical pulps, bleached or unbleached. The technology disclosed in this invention yields individual lignocellulosic entities, for instance, hydrophobic pulp fibers, that can be used in combination with other fibers or polymers to produce nonwoven fibrous materials or composites. A significant aspect of the invention is that the modified lignocellulosic material possesses an efficient hydrophobic barrier and minimum interfacial energy to generate optimum adhesion when introduced to polymer resins.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: March 25, 2014
    Assignee: Fpinnovations
    Inventors: Wadood Y. Hamad, Ali Hayek
  • Patent number: 8663426
    Abstract: The present invention relates to a method of producing a cellulose-fiber flat structure, the method including obtaining a cellulose-fiber flat structure by filtering a fine cellulose-fiber dispersion containing fine cellulose fibers having an average fiber diameter of 4 to 100 nm, using a filter material having a water permeability of not more than 100 ml/m2·s and an initial tensile modulus of 20 MPa or greater. The present invention is able to produce a cellulose-fiber flat structure by efficiently recovering fine cellulose fibers from a dispersion containing fine cellulose fibers having an average fiber diameter at the nano level. The method of producing a cellulose-fiber flat structure can also be applied to a continuous process.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: March 4, 2014
    Assignees: Mitsubishi Chemical Corporation, Oji Paper Co., Ltd.
    Inventors: Tsuyoshi Fujiwara, Naohide Ogita, Takashi Kawamukai
  • Patent number: 8647468
    Abstract: A process for treating cellulosic fibers comprising pre-treating the fibers with an enzyme in a first enzymatic treatment followed by mechanical pre-treating the fibers in a first mechanical treatment and a second enzymatic treatment followed by a second mechanical treatment of the fibers to form micofibrillated cellulose. In this way it is possible to produce mircofibrillated cellulose (MFC) in an improved and energy efficient way.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: February 11, 2014
    Assignee: Stora Enso OYJ
    Inventors: Isto Heiskanen, Kaj Backfolk, Marianna Vehviläinen, Taina Kamppuri, Pertti Nousiainen