EP1618253A2 - Procede de fabrication d'une substance fibreuse determinee pour produire une bande de tissu ou une bande a usage hygienique - Google Patents

Procede de fabrication d'une substance fibreuse determinee pour produire une bande de tissu ou une bande a usage hygienique

Info

Publication number
EP1618253A2
EP1618253A2 EP04703404A EP04703404A EP1618253A2 EP 1618253 A2 EP1618253 A2 EP 1618253A2 EP 04703404 A EP04703404 A EP 04703404A EP 04703404 A EP04703404 A EP 04703404A EP 1618253 A2 EP1618253 A2 EP 1618253A2
Authority
EP
European Patent Office
Prior art keywords
range
approximately
treatment unit
carbon dioxide
suspension
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04703404A
Other languages
German (de)
English (en)
Inventor
Klaus Dölle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1618253A2 publication Critical patent/EP1618253A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/001—Modification of pulp properties
    • D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
    • D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/70—Inorganic compounds forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with other substances added separately
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—Oxides, hydroxides or carbonates

Definitions

  • the invention relates to a method for producing a fiber suspension intended for the production of a tissue or hygiene web. It also relates to tissue products produced from a fiber suspension produced by such a method.
  • Tissue is also produced with a very low basis weight between 8 to 40 g / m 2 , depending on the respective end product, such as cellulose wadding (8 to 30 g / m 2 ), hygiene tissue (14 to 25 g / m 2 ) , Hygienic paper (8 to 30 g / m 2 ), napkin paper (20 to 30 g / m 2 ) and towel paper (20 to 40 g / m 2 ).
  • Tissue products are in most cases made from a bleached sulfite or sulfate pulp suspension, sometimes mixed with bleached pulp, and / or recovered pulp (e.g. broken rubber, broke, waste paper, etc.) and / or some type of pulp suspension. pension in a single-cylinder or four-wire Yankee machine. This applies regardless of whether the respective tissue product contains filler that was generated by a grinding process or another manufacturing process.
  • the material used in the conventional process is currently either precipitation material or another material such as calcium carbonate, talc, TiO 2 , silica, etc.
  • the corresponding treatment has recently been carried out by a so-called "Fiber Loading TM" process, as described, among other things. in US-A-5 223 090.
  • a "Fiber Loading TM” process at least one additive, such as, for example, is applied to the wetted fiber surfaces of the fiber material. Filler stored.
  • the fibers can be loaded with calcium carbonate, for example.
  • calcium oxide and / or calcium hydroxide is added to the moist, disintegrated fiber material in such a way that at least a part thereof is associated with the water present in the fiber material.
  • the fiber material treated in this way is then subjected to carbon dioxide.
  • the invention has for its object to provide an improved method of the type mentioned, with which the efficiency and economy of the manufacture of appropriate tissue or hygiene products is further optimized.
  • This object is achieved according to the invention by a process for producing a fiber suspension intended for the production of a tissue or hygiene web, in which the fibers contained in the fiber suspension are loaded with a filler in an online process directly in the tissue preparation line by a chemical precipitation reaction become.
  • the conventional fillers are therefore replaced by a filler produced by a chemical precipitation reaction in accordance with the "Fiber Loading TM" process.
  • the fiber pulp suspension treated accordingly has a higher drainage capacity and a lower degree of grinding.
  • the fibers loaded with filler have a lower water retention value.
  • the respective tissue product can be produced more economically after the water of the fiber suspension has been removed much faster and the tissue web can be dried faster.
  • the fibers are loaded in accordance with the "Fiber Loading TM" process, there are higher values with regard to dewatering ability with the same degree of grinding, so that a higher degree of grinding can be achieved, which means better mechanical properties for the end product.
  • the lower water retention or better drainage capacity and the better drying prove to be particularly advantageous if the respective end product is subsequently printed.
  • crystalline precipitation product particles in particular can be generated in the online process.
  • the precipitate is preferably calcium carbonate.
  • calcium oxide and / or calcium hydroxide are added to load the fibers of the fiber suspension and the precipitation is triggered by carbon dioxide or a gas containing carbon dioxide (for example flue gas or the like).
  • the crystalline precipitation product particles are preferably generated in the gas atmosphere in question without the introduction of mixing energy.
  • calcium carbonate is thus stored here on the wetted fiber surfaces by adding calcium oxide and / or calcium hydroxide to the moist fiber material, at least some of which can be associated with the water in the amount of fiber.
  • the fiber material treated in this way is then subjected to carbon dioxide or a gas containing carbon dioxide.
  • the calcium carbonate (CaCO 3 ) formed can form a suspension around and between the fibers.
  • dry fiber surfaces can encompass all wetted surfaces of the individual fibers. This also includes in particular the case in which the fibers are loaded with calcium carbonate both on their outer surface and in their interior (lumen).
  • the fibers are loaded with the filler calcium carbonate, the attachment to the wetted fiber surfaces being carried out by a so-called "Fiber Loading TM" process, as is described as such in US Pat. No. 5,223,090.
  • the carbon dioxide reacts with the calcium hydroxide to form water and calcium carbonate.
  • the fiber suspension is preferably fed to a treatment unit comprising a fluffer, a refiner, a disperser and / or the like.
  • the treatment unit can, for example, have such a structure as is described in US Pat. No. 6,413,365 B1 and DE 101 07 448 A.
  • the fibers of the fiber suspension can be loaded with filler before or after the treatment unit comprising a fluffer, a refiner, a disperger and / or the like.
  • the treatment unit comprising a fluffer, a refiner, a disperger and / or the like is simultaneously used as a reactor for the chemical precipitation reaction.
  • the method can be designed, for example, as described in the two publications mentioned above.
  • the calcium hydroxide can be added to the fiber suspension in liquid form or in dry form.
  • a preferred practical embodiment of the method according to the invention is characterized in that the fibrous suspension, e.g. the pulp suspension previously mixed with calcium hydroxide, to which a treatment unit comprising a fluffer, a refiner, a disperger and / or the like is fed with a consistency in a range from about 5 to about 60% and preferably in a range from about 15 to about 35 % lies.
  • a treatment unit comprising a fluffer, a refiner, a disperger and / or the like
  • the carbon dioxide or the gas containing carbon dioxide can be added before, after and / or in the treatment unit.
  • the carbon dioxide or the gas containing carbon dioxide is advantageously added at a temperature which is in a range from about -15 to about 120 ° C. and preferably in a range from about 20 to about 90 ° C.
  • crystalline precipitate particles of a rhombohedral shape, a scalenohedral shape and / or spherical crystalline precipitate product particles can be produced.
  • the respective amount of crystalline precipitation product particles depends, among other things, on the respective temperature range for the fiber stock suspension and the carbon dioxide as well as e.g. on the proportion of calcium hydroxide in the fiber suspension.
  • a treatment unit in the form of a disperser with two mutually opposite, relatively rotating plates and preferably in the form of a disperser with a rotor and a stator is advantageously used.
  • the respective disperser can, for example, again have such a structure as the disperser described in US Pat. No. 6,413,365 B1 and DE 101 07 448 A.
  • the dimensions of the crystalline precipitate particles are preferably influenced in the desired manner. For example, a corresponding distribution of crystalline precipitate particles in the fiber suspension can thus be achieved. Only small shear forces are preferably generated in the treatment unit concerned.
  • crystalline precipitation product particles when passing through the treatment unit, for example, crystalline precipitation product particles can be generated, the maximum dimensions of which are in a range from approximately 0.05 to approximately 5 ⁇ m and preferably in a range from approximately 0.3 to approximately 2.5 ⁇ m.
  • crystalline precipitation product particles can have a rhombohedral shape with a respective edge length in a range from about 0.05 to about
  • the fibrous suspension is advantageously diluted with water, preferably in a radially outer region of the treatment unit comprising two relatively rotating plates. The further the fibrous suspension on the rotor disk goes radially outwards, the lower the respective shear or shear force in view of the dilution water supplied.
  • the consistency of the fibrous stock suspension passed through the treatment unit is advantageously in a range of approximately 0.1 to about 50%, and preferably in a range from about 5 to about 35%.
  • the carbon dioxide or the gas containing carbon dioxide is added, for example, under a pressure which is in a range from about 0.1 to about 6 bar and preferably in a range from about 0.5 to about 3 bar.
  • a corresponding pressure can be provided in the relevant carbon dioxide supply line, via which the gas, that is to say the gas containing carbon dioxide or the carbon dioxide, is fed in, for example to form a gas ring, which are also generated in the treatment unit in question, for example can.
  • the pressure in question is then increased accordingly when a higher amount of water is required. Since the carbon dioxide is a compressible gas, the amount of gas supplied can also be increased accordingly in order to ensure a complete precipitation reaction.
  • an at least substantially complete conversion of the starting materials mentioned calcium oxide or calcium hydroxide and carbon dioxide into the reaction products calcium carbonate and water is ensured in the course of the chemical precipitation reaction by the pH of the fiber suspension, preferably via the feed of carbon dioxide or gas containing carbon dioxide is regulated or controlled accordingly.
  • a pH can be set which is in a range from about 6 to about 10 and preferably in ranges from about 7 to about 8.5. Corresponding values can be provided in particular for the final reaction.
  • the energy introduced for such a chemical precipitation reaction is preferably in a range from approximately 0.3 to approximately 8 kWh / t and preferably in a range from approximately 0.5 to approximately 4 kWh / t.
  • a consistency of the diluted fibrous suspension results which is in a range from approximately 0.1 to approximately 16% and preferably in a range from approximately 2 to approximately 6% ,
  • the pulp suspension can then be exposed to atmospheric pressure and fed to a subsequent machine or placed in a container or box.
  • the fiber suspension can then, for example, be fed to the next process machine for producing a tissue or hygiene web.
  • the treatment unit is preferably operated in such a way that its rotating plate or rotor at the radially outer edge has a peripheral speed in a range from approximately 20 to approximately 100 m / s and preferably in a range from approximately 40 to approximately 60 m / s.
  • the width of the gap between the two relatively rotating plates of the treatment unit is advantageously in a range from approximately 0.5 to approximately 100 mm and preferably in a range from approximately 25 to approximately 75 mm.
  • the diameter of the two plates of the treatment unit or of the rotor and of the stator rotating relative to one another is expediently in each case in a range from approximately 0.5 to approximately 2 m.
  • the reaction time for the chemical precipitation reaction can be, for example, in a range from approximately 0.01 min to approximately 1 min and preferably in a range from approximately 0.1 s to approximately 10 s.
  • a pressure vessel is generally not required.
  • individual crystalline precipitation product particles can be produced which are attached to or into the fibers in an evenly spaced manner in order to meet the requirements for the respective tissue product.
  • the particle sizes specified above can be generated.
  • the fiber suspension treated according to the "Fiber Loading TM" process has a higher dewatering capacity or a lower degree of grinding.
  • the relevant values can be, for example, in a range from 5 to about 100 ml of CSF or in a range from about 0.2 to about 15 ° SR, depending on the drainage capacity or the degree of grinding.
  • the correspondingly loaded fibers have lower
  • Water retention values which can range, for example, from about 2 to about 25%, depending on the particular substance input. Tissue paper can now be produced more economically, since water can be removed from the fiber suspension much more quickly and the tissue web can be dried more quickly.
  • the free precipitated calcium carbonate that is to say the calcium carbonate not deposited in or on the fibers, can be removed by a washing process before the pulp suspension of the concerned one
  • Tissue machine is supplied or, if necessary, before the grinding process.
  • the fibers remain covered with calcium carbonate, which has the advantage that the drainage is facilitated and the drying is accelerated and there is also less rewetting of the final tissue product.
  • the "Fiber Loading TM" process can basically be used before grinding, after grinding or during grinding, depending on the requirements of the respective end product. Since loading the fibers with a precipitation product results in a higher dewatering capacity with the same degree of grinding, stronger grinding is possible, which leads to better mechanical properties of the end product.
  • the lower water retention and the better drying is particularly advantageous if the product in question is subsequently printed.
  • FIG. 1 shows an exemplary embodiment in which the fiber suspension 10 is first fed to the "Fiber Loading TM" process 12 and then treated accordingly in a treatment unit 14 comprising, for example, a refiner or the like. Following this, free calcium carbonate can, if necessary, be washed out in a washing step 16. As can be seen from the above, such a washing step 16 can also be omitted. The correspondingly treated fibrous suspension 10 of a tissue is then
  • the exemplary embodiment shown in FIG. 2 differs from that of FIG. 1 only in that the fibrous suspension 10 first of all comprises the treatment unit 14, for example comprising a refiner or the like, and only then the "Fiber Loading TM" Process is fed. In this case too, the washing step 16 is in no way mandatory.
  • the treatment unit 14 for example comprising a refiner or the like
  • the fibers contained in the fiber suspension 10 are loaded with a filler in an online process directly in the tissue preparation line by a chemical precipitation reaction, crystalline precipitation product particles being generated in the online process.
  • the precipitate is preferably calcium carbonate.
  • calcium oxide and / or calcium hydroxide is added to the fiber suspension for loading the fibers.
  • the precipitation is then triggered by carbon dioxide or a gas containing carbon dioxide (for example flue gas or the like).
  • the crystalline precipitation product particles are generated in the gas atmosphere in question without the introduction of mixing energy.
  • the fiber suspension can in particular be fed to a treatment unit 14 comprising a fluffer, a refiner, a disperser and / or the like.
  • the fibers of the fiber suspension 10 can be loaded with filler before or after the treatment unit 14. In principle, it is also conceivable to use the treatment unit 14 at the same time as a reactor for the chemical precipitation reaction.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Nonwoven Fabrics (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

L'invention concerne un procédé permettant de fabriquer une suspension de substance fibreuse déterminée pour la production d'une bande de tissu ou d'une bande à usage hygiénique. Selon ce procédé, les fibres contenues dans la suspension du substance fibreuse sont munies d'une charge, dans un processus en direct, par réaction par précipitation chimique, directement dans la ligne de préparation de la substance pour tissus.
EP04703404A 2003-01-24 2004-01-20 Procede de fabrication d'une substance fibreuse determinee pour produire une bande de tissu ou une bande a usage hygienique Withdrawn EP1618253A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10302783A DE10302783A1 (de) 2003-01-24 2003-01-24 Verfahren zur Erzeugung einer für die Herstellung einer Tissue- oder Hygienebahn bestimmten Faserstoffsuspension
PCT/EP2004/050027 WO2004065690A2 (fr) 2003-01-24 2004-01-20 Procede de fabrication d'une substance fibreuse determinee pour produire une bande de tissu ou une bande a usage hygienique

Publications (1)

Publication Number Publication Date
EP1618253A2 true EP1618253A2 (fr) 2006-01-25

Family

ID=32694951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04703404A Withdrawn EP1618253A2 (fr) 2003-01-24 2004-01-20 Procede de fabrication d'une substance fibreuse determinee pour produire une bande de tissu ou une bande a usage hygienique

Country Status (7)

Country Link
US (1) US20060113051A1 (fr)
EP (1) EP1618253A2 (fr)
CN (1) CN1742136A (fr)
BR (1) BRPI0406948A (fr)
CA (1) CA2514297A1 (fr)
DE (1) DE10302783A1 (fr)
WO (1) WO2004065690A2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10357437A1 (de) * 2003-12-09 2005-07-07 Voith Paper Patent Gmbh Verfahren zum Beladen einer Faserstoffsuspension und Anordnung zur Durchführung des Verfahrens
CN1937996B (zh) * 2004-04-07 2012-04-18 花王株式会社 毛发处理剂和毛发处理方法
DE102005015490A1 (de) * 2005-04-05 2006-06-08 Voith Paper Patent Gmbh Verfahren zum Beladen einer Faserstoffsuspension und Anordnung zur Durchführung des Verfahrens
DE102006003721A1 (de) * 2005-07-12 2007-01-18 Voith Patent Gmbh Verfahren zum Beladen von in einer Faserstoffsuspension enthaltenen Fasern
US7998313B2 (en) * 2006-12-07 2011-08-16 Georgia-Pacific Consumer Products Lp Inflated fibers of regenerated cellulose formed from ionic liquid/cellulose dope and related products
WO2008154961A1 (fr) * 2007-06-21 2008-12-24 Metso Paper, Inc. Procédé et système de broyage en association avec le couchage et le chargement d'une nappe
US8808503B2 (en) * 2009-02-02 2014-08-19 John Klungness Fiber loading improvements in papermaking
EP3216918A1 (fr) * 2016-03-10 2017-09-13 Linde Aktiengesellschaft Procédé de réduction de dureté de l'eau pour la fabrication du papier et cod
WO2018140252A1 (fr) * 2017-01-26 2018-08-02 Kimberly-Clark Worldwide, Inc. Fibres traitées et structures fibreuses les comprenant
US11268241B2 (en) 2017-03-31 2022-03-08 Nippon Paper Industries Co., Ltd Method for manufacturing inorganic particle composite fiber sheet

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US5223090A (en) * 1991-03-06 1993-06-29 The United States Of America As Represented By The Secretary Of Agriculture Method for fiber loading a chemical compound
GB9520703D0 (en) * 1995-10-10 1995-12-13 Ecc Int Ltd Paper coating pigments and their production and use
US6503466B1 (en) * 1998-08-06 2003-01-07 Voith Sulzer Paper Technology North America, Inc. Apparatus and method for chemically loading fibers in a fiber suspension
US6355138B1 (en) * 2000-02-24 2002-03-12 Voith Sulzer Paper Technology North America, Inc. Method of chemically loading fibers in a fiber suspension
US6533895B1 (en) * 2000-02-24 2003-03-18 Voith Sulzer Paper Technology North America, Inc. Apparatus and method for chemically loading fibers in a fiber suspension
DE10033978A1 (de) * 2000-07-13 2002-01-24 Voith Paper Patent Gmbh Verfahren sowie Vorrichtung zum Beladen von Fasern mit Calciumcarbonat
US6458241B1 (en) * 2001-01-08 2002-10-01 Voith Paper, Inc. Apparatus for chemically loading fibers in a fiber suspension
FR2821094B1 (fr) * 2001-02-16 2003-04-11 Arjo Wiggins Sa Feuille papetiere comportant de la vaterite et son procede d'obtention
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Also Published As

Publication number Publication date
BRPI0406948A (pt) 2006-01-03
US20060113051A1 (en) 2006-06-01
CN1742136A (zh) 2006-03-01
DE10302783A1 (de) 2004-08-12
WO2004065690A3 (fr) 2005-01-06
WO2004065690A2 (fr) 2004-08-05
CA2514297A1 (fr) 2004-08-05

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