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EP0948677B1 - Procede de production de papier - Google Patents

Procede de production de papier Download PDF

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Publication number
EP0948677B1
EP0948677B1 EP97952902A EP97952902A EP0948677B1 EP 0948677 B1 EP0948677 B1 EP 0948677B1 EP 97952902 A EP97952902 A EP 97952902A EP 97952902 A EP97952902 A EP 97952902A EP 0948677 B1 EP0948677 B1 EP 0948677B1
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EP
European Patent Office
Prior art keywords
cationic
paper
retention
agents
polyethyleneimines
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.)
Expired - Lifetime
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EP97952902A
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German (de)
English (en)
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EP0948677A1 (fr
Inventor
Werner Auhorn
Dietmar MÖNCH
Rainer Dyllick-Brenzinger
Rainer Scholz
Rainer Blum
Hubert Meixner
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BASF SE
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BASF SE
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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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/24—Addition to the formed paper during paper manufacture
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/08—Regulating consistency
    • 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
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
    • D21H17/375—Poly(meth)acrylamide
    • 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
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06—Paper forming aids
    • D21H21/10—Retention agents or drainage improvers

Definitions

  • the invention relates to a method for producing paper by dewatering a pulp containing process chemicals on a paper machine in which the paper machine sieve a main stream of paper stock via a headbox and feeds a dilution stream consisting of white water, whose share in the total headbox feed 5 to 35 vol .-% is.
  • the paper machines usually only have one Electricity for feeding the paper stock to the headbox.
  • the paper stock contains Process chemicals such as fixatives, drainage aids, Retention aids and flocculants and, if appropriate, sizing agents, Dry and wet strength agents, dyes and fillers.
  • the dosage of the process chemicals to the paper stock can be various methods described in the literature become. So from weekly paper manufacturing, Volume 13, 493-502 (1979) the use of cationic polyelectrolytes known in combination with bentonite, whereby the First paper bentonite and then the cationic Adds polyelectrolytes, the paper stock optionally can be subjected to a shear gradient.
  • EP-B-0 235 893 discloses a paper stock first a synthetic cationic polymer with a molecular weight of to add more than 500,000 flakes that are formed then crushed into microflakes in a subsequent shear step become. Then bentonite is added and the Process material containing dewatered. With that processes known from EP-A-0 335 575 for the production of paper the paper stock is successively treated with two different water-soluble cationic polymers added. Here you dose initially a low molecular weight cationic polymer as a fixative and then a high molecular weight cationic polymer as Flocculant, then subjects the pulp to form of micro flakes at a shear level, bentonite clogs and drains then him. The formation profile of the papers so produced is in need of improvement, however.
  • the invention has for its object a method for manufacturing of paper to provide, facing one the known methods an increase in retention, in particular fiber and fines retention as well as filler retention, if applicable achieved and at the same time papers with a uniform Formation cross profile receives.
  • the object is achieved with a method for Manufacture of paper by dewatering a process chemical and optionally filler-containing paper stock on a Paper machine, in which the paper machine sieve over one Headbox a main stream of paper stock and one out White water supplies existing dilution stream, the proportion of which the total headbox feed is 5 to 35 vol .-% if one at least 5% by weight of the process chemicals in the dilution stream dosed.
  • the papers produced in this way are uniform Formation cross profile and surprisingly contain one very good qualitative binding of the fine and fillers to the Long fiber material, so that these papers practically not or in dust to a non-disturbing degree.
  • most of the time Impurities contained in the white water such as wood constituents, adhesive Impurities from the paper line on recycled fibers or when using waste paper almost quantitatively to the Paper stock fixed and thus for the paper manufacturing process and made the later paper recycling harmless.
  • a headbox with a main and a dilution stream which is via metering valves the individual sections of the headbox for adjustment of the consistency cross section is fed.
  • the dilution stream consists of white water. It is well known that white water contains fine substances and fiber fragments from those used in papermaking used cellulose or wood pulp fibers. These fines are usually difficult to get out of the cycle. If filler-containing papers are made, contains the white water, based on fiber, at least one twice as much filler as the main stream.
  • the Share of the dilution stream consisting of the white water the total headbox feed is, for example, 5 to 35 vol%, preferably 7 to 15 vol%. Suitable constructions for carrying out the method according to the invention are described in the references cited above for the prior art "Das Paper "and in” Kliblatt für Textilfabrikation ".
  • Suitable process chemicals are, for example, fixing agents, drainage aids, retention agents, flocculants alone, in a mixture with one another or in combination with bentonite and / or colloidal silica, dyes, mass sizing agents, dry strength agents and / or wet strength agents.
  • Polymers such as polymers containing vinylamine units, for example, can simultaneously act as fixing agents, drainage aids, retention aids and as a flocculating agent, and as dry and wet strength agents.
  • the process chemicals are therefore added to the paper stock in the usual manner and in the same way as in the known paper production, so that reference can be made in this regard to the known prior art for paper production.
  • cationic fixing agents are used to eliminate interfering substances which interfere with the effectiveness of retention agents, wet and dry strength agents and bulk sizing agents. Such contaminants are, for example, lignin sulfonates or humic acids.
  • Cationic fixing agents which can be used are, for example, polyethyleneimines, polymers containing vinylamine units and / or poly (diallyldimethylammonium chlorides) with a molar mass M w of 10,000 to 2,000,000 each.
  • Polymers containing vinylamine units are known to be prepared by homo- or copolymerization of N-vinylformamide and subsequent hydrolysis of the polymers with acids or bases, cf. EP-B-0 071 050 and EP-B-0 216 387.
  • Process chemicals which can be used are, for example, cationic fixatives, cationic drainage aids, cationic retention agents and cationic flocculants, alone or as a mixture with one another.
  • Cationic polyacrylamides with a high molecular weight, for example with molecular weights M w of at least 4000000, are particularly suitable as retention and flocculants.
  • the high molecular weight cationic polyacrylamides are produced by polymerizing acrylamide with cationic monomers.
  • Suitable cationic monomers are, for example, the esters of ethylenically unsaturated C 3 to C 5 carboxylic acids with amino alcohols, such as dimethylaminoethyl acrylate, diethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate and di-n-propylaminoethyl acrylate.
  • Suitable cationic monomers that can be copolymerized with acrylamide are N-vinylimidazole, N-vinylimidazoline and basic acrylamides such as dimethylaminoethylacrylamide.
  • the basic monomers can be used in the form of the free bases, as salts or in quaternized form in the copolymerization.
  • the cationic polyacrylamides contain, for example, 5 to 40, preferably 10 to 40% by weight of cationic monomers in copolymerized form.
  • the molecular weights M w of the cationic polyacrylamides are at least 4,000,000 and in most cases are above 5,000,000, for example in the range from 5,000,000 to 1,500,000.
  • anionic ones can also be used Polyacrylamides, for example acrylic acid or methacrylic acid polymerized contain, as well as amphoteric polyacrylamides Drainage aids, retention aids and flocculants deploy.
  • Cationic, nonionic, amphoteric or anionic Polymers used as drainage aids, retention aids and Flocculants are used, for example, in Combination with bentonite and / or colloidal silica improved effectiveness. This is particularly the case if you also use a cationic fixative. The State of the art specified in the introduction to the description clarifies this.
  • Water-soluble for example, are also used as process aids
  • Polymers used which are selected from polyethyleneimines, Reaction products of polyethyleneimines with at least bifunctional crosslinkers, anionic polyacrylamides, cationic Polyacrylamides, amphoteric polyacrylamides, reaction products from polyamidoamines grafted with ethyleneimine at least two crosslinkers containing functional groups, vinylformamide units and / or containing vinylamine units Polymers and poly (diallyldimethylammonium halides).
  • Polyethyleneimines are, for example, by polymerizing ethyleneimine in aqueous medium in the presence of traces of acids or acids Connections established.
  • water-soluble, Polymeric reaction products containing amino groups which are available through the implementation of Michael addition products from polyalkylene polyamines, polyamidoamines, with ethyleneimine grafted polyamidoamines and mixtures of the above Compounds and monoethylenically unsaturated carboxylic acids, salts, Esters, amides or nitriles with at least bifunctional ones Networkers.
  • Such reaction products are, for example, from the WO-A-94/14873 known. To make them come out halogen - containing crosslinkers especially halogen - free crosslinkers in Consider how glycidyl ethers of polyalkylene glycols.
  • the monobasic carboxylic acids have, for example, 1 to 28, preferably 8 to 18 carbon atoms and can optionally have one or contain several ethylenic double bonds, e.g. Oleic acid or Linolenic acid.
  • modified polyethyleneimines can the molecular weights of the polyethyleneimines in question up to 2 million and are preferably in the range from 1000 to 50000.
  • the polyethyleneimines become partial amidated with monobasic carboxylic acids, so that, for example, 0.1 to 90, preferably 1 to 50% of the amidatable nitrogen atoms is present as an amide group in the polyethyleneimines.
  • Suitable, at least crosslinkers containing two functional double bonds are mentioned above. Halogen-free crosslinkers are preferred used.
  • crosslinkers In the reaction of compounds containing amino groups with Crosslinkers are, for example, based on 1 part by weight of one Compound containing amino groups 0.001 to 10, preferably 0.01 to 3 parts by weight of at least one crosslinker.
  • polyethyleneimines are quaternized polyethyleneimines. Both homopolymers of ethyleneimine and polymers which contain, for example, ethyleneimine grafted on are suitable for this purpose.
  • the polyethyleneimines obtainable in this way have a broad molar mass distribution and molar masses of, for example, 129 to 2 ⁇ 10 6 , preferably 430 to 1 ⁇ 10 6 .
  • the polyethyleneimines and the quaternized polyethyleneimines can optionally with at least two functional Crosslinkers containing groups can be implemented.
  • the quaternization the polyethyleneimines can, for example, with alkyl halides such as methyl chloride, ethyl chloride, hexyl chloride, Benzyl chloride or lauryl chloride and with, for example Dimethyl sulfate can be made.
  • alkyl halides such as methyl chloride, ethyl chloride, hexyl chloride, Benzyl chloride or lauryl chloride and with, for example Dimethyl sulfate can be made.
  • Other suitable amino groups containing polymers are phosphonomethylated polyethyleneimines and alkoxylated polyethyleneimines, for example by reaction of polyethyleneimine with ethylene oxide and / or propylene oxide are available.
  • the phosphonomethylated and the alkoxylated Polyethyleneimines can optionally be combined with at least two crosslinkers containing functional groups.
  • the alkoxylated polyethyleneimines contain 1 to 100 per NH group, preferably 2 to 20 alkylene oxide units.
  • the molecular weight of the Polyethyleneimines can be up to 2 million.
  • Preferably polyethyleneimines with molar masses are used for the alkoxylation from 1000 to 50000.
  • Other suitable water-soluble retention agents or fixatives are reaction products of Polyethyleneimines with diketenes, e.g. of polyethyleneimines one Molar mass from 1000 to 50000 with distearyl diketene. Even those Products can optionally be functional with at least two Crosslinkers containing groups can be implemented.
  • Reaction products from polyamidoamines grafted with ethyleneimine with at least two crosslinkers having functional groups are known from DE-B-2 434 816.
  • a crosslinker for example ⁇ , ⁇ -bis (chlorohydrin) ether of polyalkylene oxides with 1 to 100 alkylene oxide units into consideration.
  • the resulting Resins have - measured at 20 ° C in 20 wt .-% aqueous Solution - a viscosity of more than 300 mPas.
  • Other process chemicals are reaction products for papermaking of polyalkylene polyamines, dimethylamine, diethylamine or Ethylenediamine with epichlorohydrin or dichloroethane or others at least bifunctional crosslinkers.
  • Reaction products of this Art are for example from EP-A-0 411 400 and DE-A-2 162 567 known.
  • Another preferred retention system consists of combinations of cationic synthetic polymers and / or cationic starch with finely divided organic or inorganic solids. Such systems are specified in the prior art described at the outset and in references EP-B-0 041 056, EP-B-0 080 986 and EP-B-0 218 674.
  • Fine-particle inorganic solids come for this retention agent system Bentonite, colloidal silica, microcrystalline talc, precipitated calcium carbonate, precipitated gypsum and / or calcined clay.
  • the amount of finely divided solids is, for example, 0.01 to 2.0% by weight, based on dry paper. It is particularly preferred to use the above-mentioned retention agent systems composed of cationic synthetic retention agents and / or cationic starch in combination with bentonite, which can optionally be activated in an alkaline or acidic manner or colloidal silica.
  • Bentonite and silica, as well as the other finely divided inorganic substances that are considered, are preferably used in amounts of 0.02 to 0.5% by weight, based on dry paper.
  • the inorganic, finely divided solids for example, have an inner surface area of 5 to 1000 m 2 / g (determined according to BET with nitrogen).
  • finely divided organic particles can be considered, for example crosslinked polyacrylic acid or modified lignin sulfonate.
  • the finely divided organic solids also increase retention.
  • Such a system is known for example from WO-A-96/26220 for the combination of cationically modified cellulose particles with polyacrylamides.
  • the other retention and flocculation agents mentioned above can also be combined with these cellulose particles to form an effective retention agent system.
  • the particle size of the inorganic and organic solids in the application, ie when introduced into the aqueous medium, is in the range, for example, from 10 nm to 10 ⁇ m.
  • All paper grades, Cardboard and cardboard are made, for example Papers for newspaper printing, so-called medium-fine writing and printing papers, gravure papers and also lightweight Coating base papers.
  • Pulp also comes as raw materials for the production of the pulp and wood pulp into consideration. These substances are mainly used in the so-called integrated factories in more or less humid Form directly without further thickening or drying Paper processed. Because of the not completely removed from it These fiber materials still contain impurities Fabrics that severely disrupt the usual paper manufacturing process. To However, the method according to the invention can also contain contaminants containing pulps can be processed easily.
  • both filler-free as well as filler-containing papers can be up to a maximum of 40% by weight and is preferably in the range of 5 to 25% by weight.
  • Suitable Fillers are, for example, clay, kaolin, native and precipitated Chalk, titanium dioxide, talc, calcium sulfate, barium sulfate, Alumina, satin white or mixtures of the above Fillers.
  • the consistency of the pulp is, for example, 0.1 to 15% by weight.
  • at least one cationic polymer is first added as a fixing agent to the fiber slurry and then at least one cationic polymer which acts as a retention agent is added. This addition causes a strong flocculation of the paper stock.
  • the z. B. in one or more cleaning, mixing and pumping stages or a pulper, classifier or also in a refiner or sieve through which the pre-flocked paper stock is passed, the so-called "hard giant flakes" present in the flocked system are destroyed . Bentonite, colloidal silica or calcined clay are preferably added after the shear stage, so-called soft microflakes are formed.
  • the amounts of bentonite, colloidal silica or calcined clay are 0.01 to 2, preferably 0.02 to 0.5% by weight, based on dry paper stock.
  • Bentonite is a layered aluminum silicate based on montmorillonite that occurs naturally. It is mostly used after the calcium ions have been replaced by sodium ions.
  • bentonite in an aqueous slurry is treated with sodium hydroxide solution. This makes it fully swellable in water and forms highly viscous thixotropic gel structures.
  • the platelet diameter of the bentonite is, for example, 1 to 2 ⁇ m, the platelet thickness is approximately 1 nm (10 ⁇ ).
  • the bentonite has a specific surface area of 60 to 800 m 2 / g. Due to the large inner surface and the outwardly negative excess charges on the surface, such inorganic polyanions can be used for adsorptive collection effects of cationically charged and sheared paper materials. This results in optimal flocculation in the paper stock.
  • Dyes, mass sizing agents (especially alkyldiketene dispersions, Resin glue, alkenyl succinimide dispersions or glue polymer dispersions) and solidifying agents (e.g. with Epichlorohydrin crosslinked polyamidoamines) can optionally dosed exclusively into the headbox via the dilution stream become.
  • the figures mean in percent Percent by weight, the parts are parts by weight.
  • the molecular weights were determined by light scattering.
  • Example 3 is made by condensing adipic acid with diethylenetriamine prepared a polyamidoamine and then in aqueous Grafted solution with so much ethyleneimine that the polyamidoamine per basic nitrogen grouping 6.7 ethyleneimine units grafted contains.
  • a 10% aqueous solution of the polymer has a viscosity of 22 mPas.
  • the polyamidoamine grafted with ethyleneimine is then by reaction with a bis-glycidyl ether of a polyethylene glycol the average molecular weight of 2000 according to the information in Example 3 of DE-B-2 434 816 networked.
  • An ethyleneimine unit is obtained containing polymer with a viscosity of 120 mPas (determined in 10% aqueous solution at 20 ° C and pH 10). The Concentration of the aqueous solution is 12.5%, the pH is 10.
  • Cationic copolymer of acrylamide and dimethylaminoethyl acrylate that is quaternized with methyl chloride with a content of acrylamide of 84 mol% and a molar mass of approximately 10 million Charge density of the copolymer is 1.7 mEq / g at pH 4.5.
  • Crosslinked polyethyleneimine with an average molecular weight Mw of 1.4 million and a charge density of 20.4 mEq / g (measured at pH 4.5).
  • Crosslinked polyethyleneimine with an average molecular weight of 1 million and a charge density of 14.7 mEq / g (measured at pH 4.5).
  • SC paper super calendered paper
  • This paper stock was on an SC paper machine with a module jet headbox from Voith-Sulzer was processed.
  • the main stream of paper stock was metered in front of the vertical sorter 0.29% polymer 1 and after the vertical sorter 0.024% Polymer 2.
  • Over the module jet headbox was the paper machine screen a dilution stream of white water is supplied to which 0.03% of polymer 1, based on dry paper, was metered in.
  • the Volume ratio of main stream to dilution stream was 9: 1.
  • the ash retention was 29.5%, the fiber and fines retention 62.4%.
  • the paper contains the fine and fillers in a very well bound form and has a very good formation cross profile and excellent ash distribution.
  • Example 1 was repeated with the exception that the above described paper stock of the SC paper machine in a single Electricity without a module jet system with the specified process aids fed and drained.
  • the ash retention was 27.8%, fiber and fines retention 60.3%.
  • Example 1 was repeated with the only exception that in the dilution stream instead of polymer 1 now 0.38% polymer 4 dosed.
  • the ash retention was 33.6%, the fiber and Fineness retention 63.6%.
  • the paper exhibits an excellent uniform formation cross profile.
  • a fabric composition of 40 parts wood pulp, 40 parts bleached pine sulfate pulp and 20 parts coated Committee was on a paper machine for wood-containing coating base papers processed into paper.
  • the paper machine was with a Dilution Head Box from Valmet. With help this device could make the headbox an existing of white water Dilution stream are supplied.
  • the ratio of Main stream to dilution stream was 9: 1 0.05% polymer 2, based on dry paper, in the main stream in front of the vertical sorter.
  • the dilution stream was added in each case in front of the vertical sorter 0.03% polymer 3, based on dry paper, and 0.1% bentonite, also based on dry Paper.
  • the ash retention was 30.5%, the fiber and Fineness retention 69.5%.
  • the paper was even Formation cross profile.
  • Example 3 was then repeated without a dilution head box.
  • the ash retention was 26.8% and the fiber and fines retention 64.6%.
  • Example 3 was repeated with the exception that one, each based on dry paper, in the dilution stream of the dilution Head box 0.02% polymer 2 in front of the vertical sorter and 0.1% bentonite dosed after the vertical sorter and into the Main stream 0.04% polymer 2 before passing through the vertical sorter gave.
  • the ash retention was 30.1%, the fiber and Fineness retention 69.7%.
  • the paper showed an excellent Ash distribution and had a uniform formation cross profile.
  • Example 4 was repeated without dilution head box dosing. Here the ash retention was 25.7% and the fiber and fines retention 63.7%.

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Claims (12)

  1. Procédé de fabrication de papier par déshydratation d'une pâte de papier contenant des produits chimiques de procédé sur une machine à papier, dans lequel l'on conduit vers la toile de la machine à papier, par une arrivée de matière, un courant principal de pâte à papier et un courant de dilution constitué d'eau égoutté de la toile, dont la proportion dans l'alimentation totale en matière s'élève à 5-35% en volume, caractérisé en ce que l'on ajoute au moins 5% en poids des produits chimiques de procédé dans le courant de dilution.
  2. Procédé selon la revendication 1, caractérisé en ce que l'on utilise en tant que produits chimiques de procédé, des agents de fixation, des agents auxiliaires de déshydratation, des agents de rétention, des agents de floculation, seuls ou en mélanges entre eux ou en combinaison avec de la bentonite, et/ou de l'acide silicique colloïdal, des colorants, des agents d'encollage dans la masse, des agents de renfort à sec et/ou des agents de renfort à l'état humide.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'on utilise en tant que produits chimiques de procédé, des agents de fixation cationiques, des agents auxiliaires de déshydratation cationiques, des agents de rétention cationiques et des agents de floculation cationiques, seuls ou en mélanges entre eux.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on utilise des polymères cationiques ou anioniques, en tant qu'agents auxiliaires de déshydratation, qu'agents de rétention et qu'agents de floculation, en combinaison avec de la bentonite et/ou de l'acide silicique colloïdal.
  5. Procédé selon la revendication 4, caractérisé en ce que l'on ajoute en outre un agent de fixation cationique.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'on utilise comme agents auxiliaires de procédé des polymères solubles dans l'eau choisis parmi les polyéthylène-imines, les produits de la réaction de polyéthylène-imines avec des réticulants au moins bifonctionnels, des polyacrylamides anioniques, des polyacrylamides cationiques, des polyacrylamides amphotères, des produits réactionnels de polyamidoamines greffées à l'éthylène-imine avec des réticulants présentant au moins deux groupements fonctionnels, des polymères contenant des motifs vinylformamide et/ou vinylamine et des poly(halogénures de diallyldiméthylammonium).
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'on utilise en tant qu'agent de fixation cationique, des polyéthylène-imines, des polymères contenant des motifs vinylamine et/ou des poly(chlorures de diallyldiméthylammonium) ayant chacun une masse molaire Mw de 10 000 à 2 millions.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'on utilise en tant qu'agent auxiliaire de déshydratation, qu'agents de rétention et qu'agents de floculation, des polyacrylamides cationiques solubles dans l'eau ayant une masse molaire moyenne Mw d'au moins 500 000 et/ou les produits de réaction solubles dans l'eau qui peuvent être obtenus par réaction de polyamidoamines greffées à l'éthylène-imine avec des réticulants au moins bifonctionnels.
  9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'on utilise en tant que produits chimiques de procédé des combinaisons de polymères cationiques et/ou des amidons cationiques avec des matières solides organiques ou minérales finement divisées.
  10. Procédé selon la revendication 9, caractérisé en ce que l'on utilise en tant que matières solides minérales finement divisées, de la bentonite, de l'acide silicique colloïdal, du talc microcristallin, du carbonate de calcium précipité, du gypse précipité et/ou de l'argile calcinée.
  11. Procédé selon l'une quelconque des revendications 1 à 10, caractérisé en ce que les quantités de matières solides finement divisées s'élève à 0,01-2,0% en poids, par rapport au papier séché.
  12. Procédé selon l'une quelconque des revendications 1 à 11 caractérisé en ce que la pâte à papier contient au moins une charge.
EP97952902A 1996-12-27 1997-12-09 Procede de production de papier Expired - Lifetime EP0948677B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19654390A DE19654390A1 (de) 1996-12-27 1996-12-27 Verfahren zur Herstellung von Papier
DE19654390 1996-12-27
PCT/EP1997/006857 WO1998029603A1 (fr) 1996-12-27 1997-12-09 Procede de production de papier

Publications (2)

Publication Number Publication Date
EP0948677A1 EP0948677A1 (fr) 1999-10-13
EP0948677B1 true EP0948677B1 (fr) 2000-08-30

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EP97952902A Expired - Lifetime EP0948677B1 (fr) 1996-12-27 1997-12-09 Procede de production de papier

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US (1) US6083348A (fr)
EP (1) EP0948677B1 (fr)
JP (1) JP2001508137A (fr)
AT (1) ATE195985T1 (fr)
CA (1) CA2256431C (fr)
DE (2) DE19654390A1 (fr)
ES (1) ES2151296T3 (fr)
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PT948677E (pt) 2001-01-31
WO1998029603A1 (fr) 1998-07-09
CA2256431A1 (fr) 1998-07-09
ES2151296T3 (es) 2000-12-16
JP2001508137A (ja) 2001-06-19
CA2256431C (fr) 2005-11-08
DE59702299D1 (de) 2000-10-05
DE19654390A1 (de) 1998-07-02
US6083348A (en) 2000-07-04
EP0948677A1 (fr) 1999-10-13
ATE195985T1 (de) 2000-09-15

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