US3388037A - Method in the manufacture of wood pulp from chips in grinding apparatus in two stages - Google Patents

Method in the manufacture of wood pulp from chips in grinding apparatus in two stages Download PDF

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Publication number
US3388037A
US3388037A US370959A US37095964A US3388037A US 3388037 A US3388037 A US 3388037A US 370959 A US370959 A US 370959A US 37095964 A US37095964 A US 37095964A US 3388037 A US3388037 A US 3388037A
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US
United States
Prior art keywords
chips
pulp
manufacture
solution
defibration
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Expired - Lifetime
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US370959A
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English (en)
Inventor
Asplund Arne Johan Arthur
Cederquist Karl Nicolaus
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Valmet AB
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Defibrator AB
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Publication date
Application filed by Defibrator AB filed Critical Defibrator AB
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Publication of US3388037A publication Critical patent/US3388037A/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D21B1/16—Disintegrating in mills in the presence of chemical agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills

Definitions

  • Chemicals in solution or suspension are continously applied to the chips during the first or during both steps prior to the passage of the chips between the grinding members without noticeable loss of organic substance and the chemicals have a bleaching effect during defibration, and then the pulp suspension is cooled by a rapid reduction of the pressure.
  • This invention relates to the manufacture of cellulose pulp.
  • this invention relates to the manufacture of cellulose pulp by defibration of wood chips in grinding apparatus.
  • the main disadvantage in the defibration or refining of chips under pressure and at a high temperature, in particular within the range between 140 and 220 C., is constituted by decomposition and discoloring of the pulp due to hydrolysis.
  • a short time of heating reduces this drawback, but even if the heating time is chosen so short that the chips are brought to the temperature of defibration immediately at the moment when they enter between the grinding discs, the color of the pulp will not become satisfactory for production of, or intermixture with other constituents of newsprint.
  • the defibration of conifers such as spruce and pine or some other than the deciduous wood types mentioned above, such as aspen, for example, are in consideration for the production of mechanical pulp possessing high brightness and with high yields such as be- States Patent tween and percent, it has proved possible completely to dispense with the impregnation and instead to feed the sulfite solution to the chips immediately prior to the entering of the chips between the grinding discs.
  • the sulfite solution acts mainly as a bleaching agent and the dissolving out of organic substance remains at low values.
  • the type of pulp to which the invention primarily is to be applied may be defined as a pulp capable of replacing, or becoming completed by, pulp produced with conventional grinders.
  • a condition for obtaining excellent brightness and acceptable mechanical strength of the pulp is constituted by the time of heating of the chips including the time for the defibration being short.
  • the heating time When operating within the tem perature range between and 220 C. and in particular within the range between and C., the heating time must not exceed 5 minutes and preferably is kept below 2 minutes.
  • the heating time in this connection is calculated from the moment when the chips have reached the predetermined final temperature. For this reason the pulp must be cooled rapidly as soon as it has passed through the grinding discs which most suitably is effected by a rapid pressure reduction and expansion resulting thereof of steam.
  • the chemicals are supplied in a preferably aqueous solution or suspension to the heated chips.
  • the chips to be treated are introduced through a sluice or a so called cell-feeder 10 into a preheater 12.
  • This preheater is supplied with steam through a pipe 14 controlled by a valve 16 provided therein.
  • the preheater may have outlet 18 provided with a control valve 20 for consumed steam and/0r gases escaping from the chips.
  • the chips descend in the preheater and hereunder they are heated rapidly to the predetermined treatment temperature, such as between 160 and 180 C., depending on the temperature and pressure of the steam.
  • a screw conveyor 28 driven through a sprocket 24 by a motor (not shown) and adapted to convey the preheated chips through a channel or passage 26 to a defibrator 28 provided with two grinding discs 30, 32 in a manner known per se.
  • the defibrator may be of the type described in the co-pending patent application Ser. No. 237,911 filed Nov. 15, 1962, by Arne Johan Arthur Asplund, now abandoned.
  • the grinding disc 32 is driven by a motor 34.
  • a solution of chemicals, preferably sulfite is supplied to the chips immediately prior to their entering between the grinding discs 30, 32. This may be eifected through the intake 36 located in the channel 26.
  • the defibrated pulp is discharged through a conduit 38 in which is provided a sluice or throttle 40.
  • a sluice or throttle 40 In the defibrator 28 the same pressure is prevailing as in the preheater 12, but by the passage through the sluice 40 a sudden reduction of pressure and corresponding reduction of temperature is provoked.
  • a refiner 42 is disposed in direct connection to the defibrator 2% for which reason the conduit 38 opens into the inlet of the refiner.
  • the refiner has grinding discs 44, 46 of which the latter is driven by a motor 48.
  • the refiner may be principally of the same kind as the defibrator 28 but designed so as to bring about a more advanced disintegration of the fibers and/or splitting up of the individual fibers.
  • the temperature in the refiner may be kept below or above 100 C.
  • chemicals are supplied to the pulp immediately prior to its entrance between the grinding discs, for example through a conduit 50 which in the embodiment shown in the drawing opens radially ahead of the grinding interspace between the grinding discs.
  • the feed way for the pulp to said grinding discs after the impregnation with the chemicals will thus be very short.
  • the refiner 42 has a discharge 52 provided with a sluice or valve 54 for continuous conveyance of the pulp, for example into the surrounding free atmosphere or for further treatment.
  • the solution of chemicals may be introduced into the chip mass at a location straight inside the grinding discs.
  • the shaft 23 of the screw conveyor 22 may be made hollow and thereby become adapted to serve as supply channel opening adjacent the grinding discs.
  • the bleaching effect of the sulfite solution can be increased by an admixture of hydrosulfite or zinc oxide white powder.
  • the subsequent refining of the defibrated pulp may be effected with or without hydrosulfite, free S or free S0 and zinc oxide white being present.
  • diluted alkali solution may be added during the defibrating operation in order to counteract possible hydrolysis. The color of the pulp will become less satisfactory than when using sulfite solution, but instead it becomes easier to perform a final bleach with the bleaching agents mentioned hereinbefore.
  • the pH value of the pulp suspension must be kept at about 9.
  • a weak solution of sodium peroxide or an alkali solution to which a peroxide is added may be used.
  • the alkaline solutions may be constituted by alkalihydroxide and/ or alkali carbonate.
  • suspensions of hydrates or hydroxides and carbonates of alkaline earth metals such as calcium hydroxide and magnesium hydroxide or calcium carbonate and magnesium carbonate.
  • the chemicals when consitituted by several components may be supplied to the grinding apparatus mixed together or each separately.
  • Method of continuously producing pulp having a yield between 85% and 95% from lignocellulose material which comprises:
  • the method according to claim 1 characterized by the step of supplying a solution of chemicals consisting of sulfite solutions with or without admixture of hydrosulfite or/ and zinc oxide white powder.
  • the method according to claim 1 characterized by the step of supplying a solution of chemicals consisting of a solution of alkaline hydroxides and/or alkaline carbonate and/or a suspension consisting of hydroxides and/or carbonates of alkaline earth metals and a subsequent final bleaching of the pulp.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)
US370959A 1963-05-31 1964-05-28 Method in the manufacture of wood pulp from chips in grinding apparatus in two stages Expired - Lifetime US3388037A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE6080/63A SE303088B (zh) 1963-05-31 1963-05-31

Publications (1)

Publication Number Publication Date
US3388037A true US3388037A (en) 1968-06-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
US370959A Expired - Lifetime US3388037A (en) 1963-05-31 1964-05-28 Method in the manufacture of wood pulp from chips in grinding apparatus in two stages

Country Status (10)

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US (1) US3388037A (zh)
AT (1) AT277746B (zh)
BE (1) BE648604A (zh)
CH (1) CH429421A (zh)
DE (1) DE1517170A1 (zh)
FI (1) FI43029C (zh)
GB (1) GB1069405A (zh)
NL (1) NL6406055A (zh)
NO (1) NO120396B (zh)
SE (1) SE303088B (zh)

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467574A (en) * 1966-06-14 1969-09-16 Crown Zellerbach Corp Refiner bleaching of high yield pulps
US3627629A (en) * 1970-05-06 1971-12-14 Bauer Bros Co Refining system and process
JPS4870149A (zh) * 1971-12-20 1973-09-22
US3921918A (en) * 1973-09-06 1975-11-25 Sca Development Ab Mechanical refining of fiber material including steam recycle
US4030969A (en) * 1972-06-13 1977-06-21 Defibrator Ab Method of dispersing a bleaching agent into a stream of fibrous cellulosic pulp material in a throttling nozzle
US4037792A (en) * 1972-10-23 1977-07-26 Sca Development Aktiebolag Continuously refining raw fibrous material to produce mechanical refiner pulp
US4087317A (en) * 1975-08-04 1978-05-02 Eucatex S.A. Industria E Comercio High yield, low cost cellulosic pulp and hydrated gels therefrom
US4106979A (en) * 1977-03-21 1978-08-15 Consorzio Fabocart S.P.A. Preparation of paper pulps from dicotyledonous plants
FR2388074A1 (fr) * 1977-04-19 1978-11-17 Valmet Oy Procede pour ameliorer les proprietes d'une pulpe broyee par voie thermomecanique
US4229251A (en) * 1974-12-09 1980-10-21 Domtar, Inc. High-yield semi-chemical carbonate pulping process
US4229250A (en) * 1979-02-28 1980-10-21 Valmet Oy Method of improving properties of mechanical paper pulp without chemical reaction therewith
US4247362A (en) * 1979-05-21 1981-01-27 The Buckeye Cellulose Corporation High yield fiber sheets
US4270976A (en) * 1976-11-23 1981-06-02 Defibrator Ab Method of producing peroxide bleached pulp
US4349413A (en) * 1979-07-25 1982-09-14 The Black Clawson Company Cellulosic fiber insulation and process of preparation
US4455237A (en) * 1982-01-05 1984-06-19 James River Corporation High bulk pulp, filter media utilizing such pulp, related processes
US4455195A (en) * 1982-01-05 1984-06-19 James River Corporation Fibrous filter media and process for producing same
WO1987003022A1 (en) * 1985-11-06 1987-05-21 Sunds Defibrator Aktiebolag Method of making mechanical pulp
US4699691A (en) * 1980-11-24 1987-10-13 W. R. Grace & Co. Thermomechanical digestion process
US5076892A (en) * 1989-07-20 1991-12-31 Sprout-Bauer Inc. Apparatus for pressurized refining of lignocellulose material
US5085735A (en) * 1989-09-05 1992-02-04 Kamyr Ab Method of refining cellulosic fibrous material with successive expansions before impacts, and expansions, to achieve increased fiber flexibility
US5129987A (en) * 1988-03-16 1992-07-14 Morton Thiokol, Inc. Process for bleaching mechanical wood pulp with sodium hydrosulfite and sodium hydroxide in a refiner
US5298118A (en) * 1988-07-12 1994-03-29 Atochem Preparation of bleached chemithermomechanical pulp
US5607547A (en) * 1992-12-14 1997-03-04 Hoechst Celanese Corporation Method for reduced sulfur dioxide formation in refiner bleaching
US5607546A (en) * 1990-02-13 1997-03-04 Molnlycke Ab CTMP-process
US6156159A (en) * 1993-10-13 2000-12-05 Kvaerner Pulping Ab Device for mixing of a fluid into a pulp-suspension
US6458245B1 (en) 1990-02-13 2002-10-01 Sca Research Ab CTMP-process
EP1266994A1 (en) * 2001-05-16 2002-12-18 Weyerhaeuser Company High temperature peroxide bleaching of mechanical pulps
US20040040679A1 (en) * 2002-08-31 2004-03-04 Kilgannon Robin R. Elimination of alum yellowing of aspen thermomechanical pulp through pulp washing
US20040231811A1 (en) * 2001-06-21 2004-11-25 Per Engstrand Method of producing bleached thermomechanical pulp (tmp) or bleached chemithermomechanical pulp (ctmp)
US20070277947A1 (en) * 2006-06-02 2007-12-06 Xuan Truong Nguyen Process for manufacturing pulp, paper and paperboard products
US20100224333A1 (en) * 2009-03-09 2010-09-09 Prasad Duggirala Method and chemical composition to improve efficiency of mechanical pulp
CN106351049A (zh) * 2016-11-19 2017-01-25 郑州游爱网络技术有限公司 一种便于清洗的造纸用分级碎浆设备
US9879361B2 (en) 2012-08-24 2018-01-30 Domtar Paper Company, Llc Surface enhanced pulp fibers, methods of making surface enhanced pulp fibers, products incorporating surface enhanced pulp fibers, and methods of making products incorporating surface enhanced pulp fibers
US9920484B2 (en) 2014-02-21 2018-03-20 Domtar Paper Company, Llc Surface enhanced pulp fibers at a substrate surface
US9932709B2 (en) 2013-03-15 2018-04-03 Ecolab Usa Inc. Processes and compositions for brightness improvement in paper production
US10710930B2 (en) 2014-02-21 2020-07-14 Domtar Paper Company, Llc Surface enhanced pulp fibers in fiber cement
US11441271B2 (en) 2018-02-05 2022-09-13 Domtar Paper Company Llc Paper products and pulps with surface enhanced pulp fibers and increased absorbency, and methods of making same
US11473245B2 (en) 2016-08-01 2022-10-18 Domtar Paper Company Llc Surface enhanced pulp fibers at a substrate surface
US11499269B2 (en) 2016-10-18 2022-11-15 Domtar Paper Company Llc Method for production of filler loaded surface enhanced pulp fibers
US11608596B2 (en) 2019-03-26 2023-03-21 Domtar Paper Company, Llc Paper products subjected to a surface treatment comprising enzyme-treated surface enhanced pulp fibers and methods of making the same

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE341322B (zh) * 1968-04-02 1971-12-20 Defibrator Ab
SE8501246L (sv) * 1985-03-13 1986-09-14 Eka Ab Sett att tillverka blekt, kemimekanisk och halvkemisk fibermassa med anvendning av enstegsimpregnering
DE3610940A1 (de) * 1986-03-04 1987-09-10 Escher Wyss Gmbh Hochtemperatur-hochkonsistenz-schnellbleiche
SE456826B (sv) * 1986-04-18 1988-11-07 Svenska Traeforskningsinst Saett att reducera energikonsumtionen vid raffinering av cellulosahaltigt material
US4848678A (en) * 1987-03-17 1989-07-18 Kikkoman Corporation Apparatus for crushing fruit and vegetables
US5853534A (en) * 1992-12-30 1998-12-29 Sunds Defibrator Industries Ab Method of producing pulp with high yield using a two-stage refining system operating at different temperatures
SE470555B (sv) * 1992-12-30 1994-08-22 Sunds Defibrator Ind Ab Förfarande för tillverkning av mekanisk och kemimekanisk massa med ett utbyte av över 85 % från lignocellulosahaltigt fibermaterial
EP3135811B1 (en) * 2015-08-27 2017-10-11 VestaEco SA Production method of pulp derived from biomass for producing composite boards
CN113249996B (zh) * 2021-03-08 2022-08-02 山东诺建机械科技有限公司 一种植物原料破壁制备纤维的生产工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1711706A (en) * 1924-11-03 1929-05-07 Bauer Bros Co Method of making wood pulp
US1870650A (en) * 1930-09-06 1932-08-09 Brown Co Chemical modification of cellulose fiber
US2454532A (en) * 1940-08-03 1948-11-23 Wood Conversion Co Process for defibering lignocellulose while subjected to steam and a digestive chemical
US2957795A (en) * 1956-06-07 1960-10-25 Bolton John W & Sons Inc Process for making paper pulp
US2960161A (en) * 1957-05-16 1960-11-15 John C F C Richter Device for discharging materials from vessels
US3023140A (en) * 1958-11-24 1962-02-27 Bauer Bros Co Pulp bleaching

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1711706A (en) * 1924-11-03 1929-05-07 Bauer Bros Co Method of making wood pulp
US1870650A (en) * 1930-09-06 1932-08-09 Brown Co Chemical modification of cellulose fiber
US2454532A (en) * 1940-08-03 1948-11-23 Wood Conversion Co Process for defibering lignocellulose while subjected to steam and a digestive chemical
US2957795A (en) * 1956-06-07 1960-10-25 Bolton John W & Sons Inc Process for making paper pulp
US2960161A (en) * 1957-05-16 1960-11-15 John C F C Richter Device for discharging materials from vessels
US3023140A (en) * 1958-11-24 1962-02-27 Bauer Bros Co Pulp bleaching

Cited By (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467574A (en) * 1966-06-14 1969-09-16 Crown Zellerbach Corp Refiner bleaching of high yield pulps
US3627629A (en) * 1970-05-06 1971-12-14 Bauer Bros Co Refining system and process
JPS4870149A (zh) * 1971-12-20 1973-09-22
US4236959A (en) * 1971-12-20 1980-12-02 Reinhall Rolf Bertil Method of producing fiber pulp by grinding fibrous material in a steam environment
JPS5543388B2 (zh) * 1971-12-20 1980-11-06
US4030969A (en) * 1972-06-13 1977-06-21 Defibrator Ab Method of dispersing a bleaching agent into a stream of fibrous cellulosic pulp material in a throttling nozzle
US4037792A (en) * 1972-10-23 1977-07-26 Sca Development Aktiebolag Continuously refining raw fibrous material to produce mechanical refiner pulp
US3921918A (en) * 1973-09-06 1975-11-25 Sca Development Ab Mechanical refining of fiber material including steam recycle
US4229251A (en) * 1974-12-09 1980-10-21 Domtar, Inc. High-yield semi-chemical carbonate pulping process
US4087317A (en) * 1975-08-04 1978-05-02 Eucatex S.A. Industria E Comercio High yield, low cost cellulosic pulp and hydrated gels therefrom
US4270976A (en) * 1976-11-23 1981-06-02 Defibrator Ab Method of producing peroxide bleached pulp
US4106979A (en) * 1977-03-21 1978-08-15 Consorzio Fabocart S.P.A. Preparation of paper pulps from dicotyledonous plants
FR2388074A1 (fr) * 1977-04-19 1978-11-17 Valmet Oy Procede pour ameliorer les proprietes d'une pulpe broyee par voie thermomecanique
US4229250A (en) * 1979-02-28 1980-10-21 Valmet Oy Method of improving properties of mechanical paper pulp without chemical reaction therewith
US4247362A (en) * 1979-05-21 1981-01-27 The Buckeye Cellulose Corporation High yield fiber sheets
US4349413A (en) * 1979-07-25 1982-09-14 The Black Clawson Company Cellulosic fiber insulation and process of preparation
US4699691A (en) * 1980-11-24 1987-10-13 W. R. Grace & Co. Thermomechanical digestion process
US4455237A (en) * 1982-01-05 1984-06-19 James River Corporation High bulk pulp, filter media utilizing such pulp, related processes
US4455195A (en) * 1982-01-05 1984-06-19 James River Corporation Fibrous filter media and process for producing same
WO1987003022A1 (en) * 1985-11-06 1987-05-21 Sunds Defibrator Aktiebolag Method of making mechanical pulp
US4789429A (en) * 1985-11-06 1988-12-06 Sunds Defibrator Aktiebolag Method of making mechanical pulp
US5129987A (en) * 1988-03-16 1992-07-14 Morton Thiokol, Inc. Process for bleaching mechanical wood pulp with sodium hydrosulfite and sodium hydroxide in a refiner
US5298118A (en) * 1988-07-12 1994-03-29 Atochem Preparation of bleached chemithermomechanical pulp
US5076892A (en) * 1989-07-20 1991-12-31 Sprout-Bauer Inc. Apparatus for pressurized refining of lignocellulose material
US5085735A (en) * 1989-09-05 1992-02-04 Kamyr Ab Method of refining cellulosic fibrous material with successive expansions before impacts, and expansions, to achieve increased fiber flexibility
US6458245B1 (en) 1990-02-13 2002-10-01 Sca Research Ab CTMP-process
US5607546A (en) * 1990-02-13 1997-03-04 Molnlycke Ab CTMP-process
US5607547A (en) * 1992-12-14 1997-03-04 Hoechst Celanese Corporation Method for reduced sulfur dioxide formation in refiner bleaching
US6241852B1 (en) * 1993-10-13 2001-06-05 Kvaerner Pulping Ab Method and device for mixing of a fluid into a pulp-suspension at the lowest pressure of the suspension
US6156159A (en) * 1993-10-13 2000-12-05 Kvaerner Pulping Ab Device for mixing of a fluid into a pulp-suspension
EP1266994A1 (en) * 2001-05-16 2002-12-18 Weyerhaeuser Company High temperature peroxide bleaching of mechanical pulps
US20040231811A1 (en) * 2001-06-21 2004-11-25 Per Engstrand Method of producing bleached thermomechanical pulp (tmp) or bleached chemithermomechanical pulp (ctmp)
US20040040679A1 (en) * 2002-08-31 2004-03-04 Kilgannon Robin R. Elimination of alum yellowing of aspen thermomechanical pulp through pulp washing
US7018509B2 (en) * 2002-08-31 2006-03-28 International Paper Co. Elimination of alum yellowing of aspen thermomechanical pulp through pulp washing
US20060151134A1 (en) * 2002-08-31 2006-07-13 International Paper Co. Elimination of alum yellowing of aspen thermomechanical pulp through pulp washing
US20070277947A1 (en) * 2006-06-02 2007-12-06 Xuan Truong Nguyen Process for manufacturing pulp, paper and paperboard products
US20090145562A1 (en) * 2006-06-02 2009-06-11 Xuan Truong Nguyen Process for manufacturing pulp, paper and paperboard products
US7967948B2 (en) 2006-06-02 2011-06-28 International Paper Company Process for non-chlorine oxidative bleaching of mechanical pulp in the presence of optical brightening agents
US20100224333A1 (en) * 2009-03-09 2010-09-09 Prasad Duggirala Method and chemical composition to improve efficiency of mechanical pulp
US9879361B2 (en) 2012-08-24 2018-01-30 Domtar Paper Company, Llc Surface enhanced pulp fibers, methods of making surface enhanced pulp fibers, products incorporating surface enhanced pulp fibers, and methods of making products incorporating surface enhanced pulp fibers
US10975499B2 (en) 2012-08-24 2021-04-13 Domtar Paper Company, Llc Surface enhanced pulp fibers, methods of making surface enhanced pulp fibers, products incorporating surface enhanced pulp fibers, and methods of making products incorporating surface enhanced pulp fibers
US10704165B2 (en) 2012-08-24 2020-07-07 Domtar Paper Company, Llc Surface enhanced pulp fibers, methods of making surface enhanced pulp fibers, products incorporating surface enhanced pulp fibers, and methods of making products incorporating surface enhanced pulp fibers
US9932709B2 (en) 2013-03-15 2018-04-03 Ecolab Usa Inc. Processes and compositions for brightness improvement in paper production
US10563356B2 (en) 2014-02-21 2020-02-18 Domtar Paper Company, Llc Surface enhanced pulp fibers at a substrate surface
US9920484B2 (en) 2014-02-21 2018-03-20 Domtar Paper Company, Llc Surface enhanced pulp fibers at a substrate surface
US10710930B2 (en) 2014-02-21 2020-07-14 Domtar Paper Company, Llc Surface enhanced pulp fibers in fiber cement
US11473245B2 (en) 2016-08-01 2022-10-18 Domtar Paper Company Llc Surface enhanced pulp fibers at a substrate surface
US11499269B2 (en) 2016-10-18 2022-11-15 Domtar Paper Company Llc Method for production of filler loaded surface enhanced pulp fibers
CN108043796A (zh) * 2016-11-19 2018-05-18 郑州游爱网络技术有限公司 一种便于清洗的造纸用分级碎浆设备
CN106351049B (zh) * 2016-11-19 2018-06-05 江门市鸿祥纸业有限公司 一种便于清洗的造纸用分级碎浆设备
CN108043796B (zh) * 2016-11-19 2020-12-15 博兴战新产业发展有限公司 一种便于清洗的造纸用分级碎浆设备
CN106351049A (zh) * 2016-11-19 2017-01-25 郑州游爱网络技术有限公司 一种便于清洗的造纸用分级碎浆设备
US11441271B2 (en) 2018-02-05 2022-09-13 Domtar Paper Company Llc Paper products and pulps with surface enhanced pulp fibers and increased absorbency, and methods of making same
US11608596B2 (en) 2019-03-26 2023-03-21 Domtar Paper Company, Llc Paper products subjected to a surface treatment comprising enzyme-treated surface enhanced pulp fibers and methods of making the same

Also Published As

Publication number Publication date
AT277746B (de) 1970-01-12
BE648604A (zh) 1964-09-16
FI43029C (fi) 1972-01-21
SE303088B (zh) 1968-08-12
CH429421A (de) 1967-01-31
NL6406055A (zh) 1964-12-01
GB1069405A (en) 1967-05-17
NO120396B (zh) 1970-10-12
DE1517170A1 (de) 1970-10-29
FI43029B (zh) 1970-09-02

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