WO2003072875A2 - Procede de fabrication d'une bande de matiere fibreuse - Google Patents

Procede de fabrication d'une bande de matiere fibreuse Download PDF

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Publication number
WO2003072875A2
WO2003072875A2 PCT/EP2003/050032 EP0350032W WO03072875A2 WO 2003072875 A2 WO2003072875 A2 WO 2003072875A2 EP 0350032 W EP0350032 W EP 0350032W WO 03072875 A2 WO03072875 A2 WO 03072875A2
Authority
WO
WIPO (PCT)
Prior art keywords
paper
production
range
application
filler
Prior art date
Application number
PCT/EP2003/050032
Other languages
German (de)
English (en)
Other versions
WO2003072875A3 (fr
Inventor
Klaus Doelle
Ralf Sieberth
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
Priority to AU2003219139A priority Critical patent/AU2003219139A1/en
Priority to EP03714931A priority patent/EP1481129A2/fr
Publication of WO2003072875A2 publication Critical patent/WO2003072875A2/fr
Publication of WO2003072875A3 publication Critical patent/WO2003072875A3/fr
Priority to US10/927,890 priority patent/US20050121157A1/en

Links

Classifications

    • 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 fibrous web, in particular paper or cardboard web.
  • PCC precipitated calcium carbonate
  • an additive e.g. Filler
  • a chemical precipitation reaction i.e. in particular by means of a so-called "fiber loading” process, as described, inter alia, in US Pat. No. 5,223,090.
  • at least one additive, in particular filler is embedded on the wetted fiber surfaces of the fiber material.
  • 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 aim of the invention is to provide an improved method of the type mentioned in the introduction.
  • a more uniform distribution of the filler particles and better printability should be achieved.
  • This object is achieved according to the invention by a method for producing a fibrous web, in particular paper or cardboard web, in which the fibers are loaded with a precipitation product and thereby crystalline precipitate product particles are produced, the fibers treated in this way in the form of a pumpable fiber Material suspension are fed to a sheet formation process and during this sheet formation process the filler distribution resulting over the web cross section is adjusted or controlled and / or regulated by means of a corresponding vacuum application.
  • crystalline precipitation product particles are of a size in a range from approximately 0.05 to approximately 0.5 ⁇ m, in particular in a range from 0.1 to approximately 2.5 ⁇ m and preferably in a range generated from about 0.3 to about 0.8 microns.
  • crystalline precipitate product particles can be produced in a size in a range from approximately 0.05 to approximately 0.1 ⁇ m and preferably in a range from approximately 0.3 to approximately 0.8 ⁇ m.
  • the precipitation product is calcium carbonate.
  • calcium carbonate (CaCO 3 ) when loading the fibers with filler, calcium carbonate (CaCO 3 ) can be embedded on the wetted fiber surfaces by adding calcium oxide (CaO) and / or calcium hydroxide (Ca (OH) 2 ) to the moist fiber material, at least some of which of which can associate with the water of the amount of fiber.
  • the fiber material treated in this way can then be exposed to carbon dioxide (CO 2 ).
  • dry fiber surfaces can encompass all wetted surfaces of the individual fibers. The case is also included, in particular where the fibers are loaded with calcium carbonate or any other precipitation product both on their outer surface and inside (lumen).
  • the fibers may e.g. are loaded with the filler calcium carbonate, the attachment to the wetted fiber surfaces being carried out by a so-called "fiber loading” process as described as such in US Pat. No. 5,223,090.
  • this "fiber loading” process e.g. the carbon dioxide with the calcium hydroxide to water and calcium carbonate.
  • the specified method is particularly advantageous, for example, for the production of newspaper printing, in particular with an ash content of 5 to 20%, of SCA paper, of paper coated with LWC, of ULWC paper, of wood-free uncoated paper, of wood-free coated paper, of white liner and / or bleached cardboard can be used.
  • the specified process enables the production of a completely new type of paper with even filler distribution over the entire cross-section of the paper and on the surface.
  • the paper manufacturer can thus produce a sheet of paper which results in a more even distribution of the filler content, which leads to savings in the raw material, mainly wood or secondary fibers, as well as improvements on the paper machine side, where fewer chemicals are required for the paper production process. It is now possible to make the same type of paper on a much lighter basis by achieving the same gloss after fillers are more evenly distributed, resulting in overall filler and fiber savings. On the paper product side, improvements in the physical and optical paper properties and thereby an improvement in the paper quality are achieved.
  • Improvements in printing result from the fact that an even distribution of ink particles is made possible especially on the printable surface, since the paper surface has a lower roughness and a higher uniformity. With the specified method, better printability properties result.
  • the process relates to both fabric and paper manufacturing.
  • secondary fibers or primary fibers obtained from waste paper pulp are disintegrated, stripped and cleaned.
  • the mixture is then exposed to CO 2 in a reactor in which the CaCO 3 (PCC) crystals are formed.
  • the size of the crystals can be in a range from approximately 0.05 to approximately 0.5 ⁇ m, in particular in a range from approximately 0.1 to approximately 2.5 ⁇ m and preferably in a range from approximately 0.3 to approximately 0 , 8 ⁇ m.
  • the crystals can be attached to the inside and outside of the fibers and can be provided as free PCC particles, ie as a solid in the water of the pulp.
  • the fiber pulp treated in this way can then be fed to the sheet formation or paper formation process as a pumpable fiber suspension.
  • Various steps such as dewatering, pressing, calendering are required to form a fibrous web or paper sheet.
  • a new paper product can be created by modifying the manufacturing process on the paper machine side.
  • the following machines or devices are generally used to produce a paper web: Fourdrinier machine, hybrid former (DuoFormer TM D), gap former (DuoFormer TM CFD).
  • the filler distribution that results over the cross section also results from the drawing purely by way of example.
  • the use of some type of forming device results in a more or less low ash content on the paper surface side, which can negatively influence the printability of the paper.
  • the coating surface penetrates the openings or gaps but does not cover the paper surface, which makes it difficult to print on the paper.
  • the printing ink must cover the color of the fibers.
  • white light consists of the sum of all complementary rainbow colors, white light radiation as such does not exist. This means that a certain pigment size is only good for one color. Other colors are reflected differently. Transferred to paper, this means that a high filler content is required to produce a higher whiteness if the particles are not evenly distributed.
  • the coating surface adds more white pigments to the paper, making the white surface thicker, so the light beam's runtime is longer, which results in a white color. For example, if you paint a room of brown or black color, four or five layers of white paint are required to cover the base color. The same is true for paper, where more white pigments are required to mask black color to produce high opacity paper. The whiter the paper, the less ink is needed to get the same result.
  • pulp to produce a precipitate loaded into the fibers in conjunction with any of the various formers combined with a low degree (generally minus 1.5m to 4m) or high degree vacuum (generally minus) vacuum 4 m to 7.5 m) and preferably of medium degree (generally minus 2 m to 6 m) and a device for a coating of (very) light weight, a much better filler distribution and a better topographic surface of the paper can be found in the paper sheet, ie a more uniform paper surface can be achieved.
  • the printability of the paper can also be improved, for example, by using a multi-layer headbox with which the filler distribution (PCC) in the paper can be influenced in the direction of the cross profile (X-section).
  • PCC filler distribution
  • X-section the direction of the cross profile
  • Multi-layer headboxes cannot be used for extremely lightweight grades such as Newsprint (40-50 g / m 2 ) and phone book paper (28-40 g / m 2 ). However, it is conceivable to use multi-layer headboxes for basis weights above 50 g / m 2 .
  • the base paper produced in this way has a higher drainage, which can be influenced with a modified drainage (DuoFormer, Fourdrinier, Gap-Former).
  • the higher dewatering results in a higher dry content after the press section. This means, for example, that the paper enters the press with a higher or the same dry content, but leaves the press with a higher dry content (1% higher dry content saves about four drying cylinders).
  • the improved drying range could be, for example, in a range from approximately 0.1 to approximately 5% and preferably from approximately 0.5 to approximately 2%.
  • the advantage is that the filler particles are located on the fiber and not, as with conventional fillers, between the fiber cavities. This improves printability because the printing ink is applied to the filler particles and does not have to cover the fiber first. As a result, the printing ink penetrates less into the fibers.
  • the uniform filler distribution in a given paper sheet is thus achieved by using the so-called “fiber loading” process, by which the filler particles known as precipitated calcium carbonate (PCC) are deposited on, in and between the fibers.
  • the "fiber loading” process is used in the fabric manufacturing facility known as stock preparation.
  • the treated fabric can be refined before or after to prepare it for the paper machine process.
  • the filler content can be, for example, about 50% based on the solid mass weight. Since up to 25% of the total ash content is deposited in and on the fibers, the result is that the sheet already has an ash content in the transverse direction of 25% of the desired total ash content.
  • the filler retention in the paper machines is in a range of about 30 - 60% based on the total filler content. This means that the base ash content in the transverse direction of a "FL" treated sheet is in a range from about 50% to about 85%, compared to which a conventional process reaches values between 30% and 60%.
  • the filler content in the transverse direction can be improved. While the goal in the conventional paper sheet forming process is up to 30 to 70% uniformly distributed filler content in the transverse direction, depending on the paper production process, when using "FL" -treated substance in the paper machine, the filler content evenly distributed in the transverse direction paper sheet produced is around 55% or even 95% based on the paper manufacturing process.
  • a uniform filler distribution leads to better gloss values. Better gloss values mean a higher whiteness of the sheet. Since white light is formed by the sum of all complementary rainbow colors, white light radiation as such does not exist. This means that a pigment size is only good for one color. Other colors are reflected differently. On paper, this means that a high filler content is required to produce a higher whiteness if the particles or particles are not evenly distributed. A uniform distribution of the filler particles can achieve a higher whiteness with a lower filler content, since the Filler particles are evenly spaced across the cross-section of the paper and are evenly distributed on the fibers.
  • the optimal crystal size is in a range from about 0.05 to about 0.1 ⁇ m and preferably in a range from about 0.3 to about 0.8 ⁇ m.
  • the fiber suspension previously mixed with Ca (OH) 2 is in a crystallization unit, for example a fluffer, refiner, diperger or the like, at a consistency or solids concentration in a range from about 5 to about 60%, preferably in a range from about 15 to about 35%.
  • the Ca (OH) 2 can be added in liquid or dry form.
  • the pulp or dry pulp is exposed to CO 2 .
  • the CO 2 can e.g. B. at temperatures in a range between about -15 ° C and about 120 ° C and preferably at temperatures in a range between about 20 ° C and about 90 ° C.
  • the fiber suspension enters the gas zone, where each individual fiber is exposed to a gas atmosphere, followed by the precipitation reaction, which immediately results in the CaCO 3 .
  • the shape of the CaCO 3 crystals can be, for example, rhombohedral, scalenohedral or spherical, the amount of crystal in particular being dependent on the temperature range chosen for the fiber suspension and on the CO 2 and Ca (OH) 2 content in the fiber suspension.
  • the PCC or the pulp suspension with the crystals in the lumen, on the fiber and between the fibers is passed through a rotor and a stator, where the distribution of the crystals in the pulp suspension with mixing is completed with low shear.
  • a shear distribution occurs which brings about a size distribution of the crystals of approximately 0.05 to approximately 0.5 ⁇ m and preferably approximately 0.3 to approximately 1.0 ⁇ m.
  • the shape of the filler particles used is, for example, rhombohedral with a respective cube size in a range from approximately 0.05 to approximately 1 ⁇ m or scalenohedral with a respective length in a range from approximately 0.05 to approximately 1 ⁇ m and a respective diameter in one Range from about 0.01 to about 0.5 ⁇ m, depending on the type of paper to be made.
  • the concentration of the fiber suspension passing the rotor disk is about 0.1% to about 50% and preferably about 35% to about 50%.
  • the pressure acting on the CO 2 supply line is in particular in a range from approximately 0.1 to approximately 6 bar, and preferably in a range from approximately 0.5 to approximately 3 bar, in order to provide a constant CO 2 supply to the gas ring for it - to ensure the desired chemical reaction.
  • the CO 2 supply and thus the precipitation reaction which produces the CaCO 3 can be controlled and / or regulated via the pH value.
  • pH values in a range from 6.0 to approximately 10.0 pH, preferably in a range from approximately 7.0 to approximately 8.5 pH, can be envisaged for the final reaction of the CaCO 3 crystals.
  • the energy used for this process can be in a range between approximately 0.3 kWh / t and about 8 kWh / t and preferably in a range between about 0.5 kWh / t and about 2.5 kWh / t.
  • Dilution water can be added and mixed with the pulp suspension to obtain a final dilution in which the pulp suspension produced with filler has a consistency or solid concentration in a range from, for example, about 0.1% to about 16%, preferably in a range from about 2 % to about 6%.
  • the pulp suspension is then exposed to the atmosphere in a machine, a container or the next process machine.
  • the rotational speed of the rotor disk can be on the outside diameter, in particular in a range from approximately 20 to 100 m / s and preferably in a range from approximately 40 to approximately 60 m / s.
  • the speed through the rotor and the stator is in a range of, for example, about 0.02 m / s to about 0.55 m / s and preferably in a range of about 0.05 m / s and about 0.2 m / s , depending on the filler content and the crystal size.
  • the crystal filler content, the crystal size and the speed are linearly linked.
  • the gap between the rotor and the stator is, for example, approximately 0.5 to approximately 100 mm and preferably approximately 25 to approximately 75 mm.
  • the diameter of the rotor and the stator can in particular be in a range from approximately 5 m to approximately 2 m.
  • the reaction time is, for example, in a range from about 0.01 min to 1 min, preferably in a range from about 0.1 sec to about 10 sec.
  • the method described above enables the production of individual particles that are equally spaced from one another and attached to the fibers, covering the fibers in the required manner.
  • FIG. 10 of the drawing shows the influence of certain factors on the filler distribution in the z direction purely by way of example and schematically.
  • FIG. 11 of the drawing shows, purely by way of example and schematically, a comparison of a total ash distribution in a conventional paper with a possible total ash distribution in a "FL" paper product.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

Procédé de fabrication d'une bande de matière fibreuse, en particulier d'une bande de papier ou de carton, selon lequel les fibres sont chargées d'un produit de précipitation, ce qui entraîne la production de particules cristallines de produit de précipitation, les fibres ainsi traitées sont introduites sous forme de suspension de matière fibreuse pouvant être pompée dans un processus de formation de feuilles, et pendant ce processus de formation de feuilles, la répartition de la matière de charge transversalement par rapport à la bande est commandée et / ou régulée par l'application correspondante de vide.
PCT/EP2003/050032 2002-02-28 2003-02-25 Procede de fabrication d'une bande de matiere fibreuse WO2003072875A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2003219139A AU2003219139A1 (en) 2002-02-28 2003-02-25 Method for producing a fibrous web
EP03714931A EP1481129A2 (fr) 2002-02-28 2003-02-25 Procede de fabrication d'une bande de matiere fibreuse
US10/927,890 US20050121157A1 (en) 2002-02-28 2004-08-27 Method for the fabrication of a fiber web

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002108983 DE10208983A1 (de) 2002-02-28 2002-02-28 Verfahren zur Herstellung einer Faserbahn
DE10208983.3 2002-02-28

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/927,890 Continuation US20050121157A1 (en) 2002-02-28 2004-08-27 Method for the fabrication of a fiber web

Publications (2)

Publication Number Publication Date
WO2003072875A2 true WO2003072875A2 (fr) 2003-09-04
WO2003072875A3 WO2003072875A3 (fr) 2003-12-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/050032 WO2003072875A2 (fr) 2002-02-28 2003-02-25 Procede de fabrication d'une bande de matiere fibreuse

Country Status (4)

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EP (1) EP1481129A2 (fr)
AU (1) AU2003219139A1 (fr)
DE (1) DE10208983A1 (fr)
WO (1) WO2003072875A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005121448A1 (fr) * 2004-06-09 2005-12-22 Voith Patent Gmbh Procede et dispositif pour preparer une suspension de matiere fibreuse

Families Citing this family (2)

* 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
DE102004031461A1 (de) * 2004-06-30 2006-01-26 Voith Paper Patent Gmbh Verfahren zum Herstellen einer Faserstoffbahn und Maschine zur Durchführung des Verfahrens

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5211814A (en) * 1991-05-31 1993-05-18 Valmet Paper Machinery Inc. Wire loading device in a paper machine
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
US5489365A (en) * 1992-10-14 1996-02-06 Valmet Paper Machinery Inc. Adjustable twin-wire former with suction boxes for simultaneous drainage in both directions
US5647958A (en) * 1994-06-16 1997-07-15 Voith Sulzer Papiermaschinen Gmbh Wire part of a machine for the manufacture of fibrous material webs
EP0791685A2 (fr) * 1996-02-20 1997-08-27 Metsä-Serla Oy Procédé d'addition de charges dans une suspension de fibres cellulosiques
FR2775301A1 (fr) * 1998-02-20 1999-08-27 Air Liquide Procede de synthese de carbonate de calcium au contact de fibres, nouveau produit obtenu
EP1136617A1 (fr) * 2000-02-24 2001-09-26 Voith Paper Patent GmbH Procédé pour charger chimiquement des fibres d'une suspension de fibres
EP1172477A1 (fr) * 2000-07-13 2002-01-16 Voith Paper Patent GmbH Procédé et dispositif pour le chargement de fibres avec carbonate de calcium
WO2003006740A1 (fr) * 2001-07-11 2003-01-23 Voith Paper Patent Gmbh Procede d'impregnation d'une suspension de fibres avec du carbonate de calcium

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29824482U1 (de) * 1997-07-14 2001-06-07 Imerys Minerals Ltd Pigment-Verbundmaterial
FI20002680A0 (fi) * 2000-12-07 2000-12-07 Valmet Corp Menetelmä ja laitae rainan kuiva-aineprofiilin säätämiseksi paperikoneen/kartonkikoneen viiraosalla

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5211814A (en) * 1991-05-31 1993-05-18 Valmet Paper Machinery Inc. Wire loading device in a paper machine
US5489365A (en) * 1992-10-14 1996-02-06 Valmet Paper Machinery Inc. Adjustable twin-wire former with suction boxes for simultaneous drainage in both directions
US5647958A (en) * 1994-06-16 1997-07-15 Voith Sulzer Papiermaschinen Gmbh Wire part of a machine for the manufacture of fibrous material webs
EP0791685A2 (fr) * 1996-02-20 1997-08-27 Metsä-Serla Oy Procédé d'addition de charges dans une suspension de fibres cellulosiques
FR2775301A1 (fr) * 1998-02-20 1999-08-27 Air Liquide Procede de synthese de carbonate de calcium au contact de fibres, nouveau produit obtenu
EP1136617A1 (fr) * 2000-02-24 2001-09-26 Voith Paper Patent GmbH Procédé pour charger chimiquement des fibres d'une suspension de fibres
EP1172477A1 (fr) * 2000-07-13 2002-01-16 Voith Paper Patent GmbH Procédé et dispositif pour le chargement de fibres avec carbonate de calcium
WO2003006740A1 (fr) * 2001-07-11 2003-01-23 Voith Paper Patent Gmbh Procede d'impregnation d'une suspension de fibres avec du carbonate de calcium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005121448A1 (fr) * 2004-06-09 2005-12-22 Voith Patent Gmbh Procede et dispositif pour preparer une suspension de matiere fibreuse

Also Published As

Publication number Publication date
DE10208983A1 (de) 2003-09-11
AU2003219139A1 (en) 2003-09-09
AU2003219139A8 (en) 2003-09-09
EP1481129A2 (fr) 2004-12-01
WO2003072875A3 (fr) 2003-12-24

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