WO2001004417A1 - Use of talcum in the manufacture of paper and a method for the same - Google Patents

Use of talcum in the manufacture of paper and a method for the same

Info

Publication number
WO2001004417A1
WO2001004417A1 PCT/AT2000/000191 AT0000191W WO0104417A1 WO 2001004417 A1 WO2001004417 A1 WO 2001004417A1 AT 0000191 W AT0000191 W AT 0000191W WO 0104417 A1 WO0104417 A1 WO 0104417A1
Authority
WO
WIPO (PCT)
Prior art keywords
talc
paper
cardboard
talcum
products
Prior art date
Application number
PCT/AT2000/000191
Other languages
German (de)
French (fr)
Inventor
Egon Gaksch
Peter Biza
Manfred Hangl
Original Assignee
Naintsch Mineralwerke 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 Naintsch Mineralwerke Gmbh filed Critical Naintsch Mineralwerke Gmbh
Publication of WO2001004417A1 publication Critical patent/WO2001004417A1/en

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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
    • 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
    • D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • 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
    • D21H23/50—Spraying or projecting

Definitions

  • the present invention relates to the use of talc or talc-containing products as an additive in the production of paper, cardboard, cardboard or the like. Products made of fiber material and to such a method.
  • Raw materials which mostly contain sticky impurities, are used in the manufacture of paper, cardboard, cardboard or similar products made of fiber material. These are e.g. Tree resin from the wood used or numerous sticky materials that can be found in the waste paper. These sticky contaminants can lead to deposits on the paper machine, especially on sieves, felts, press and drying cylinders, and subsequently cause production problems on the paper machine. In addition, sticky particles firmly anchored in the paper can stick to parts of the paper machine and thus lead to web breaks. These web breaks, the laying of screens and felts as well as the cylinder deposits cause costs due to lower production, necessary cleaning downtimes and additional measures to keep cylinders clean.
  • talc and products containing talc have long been used as additives, which are added directly to the pulp pulp at various points in the pulp processing or directly in front of the paper machine.
  • All talcum types such as magnesium silicate hydrate according to DIN 55924 or cationized talcum, are used as talc and talc-containing products.
  • the hydrophobic talc or the hydrophobic talc-containing products are on the surface of the sticky contaminants. adsorbing gene-forming particles, which are ideally completely enveloped by the additive. The stickiness of the contaminants is thus reduced and, in the best case, eliminated, whereby the disadvantages associated therewith can be avoided.
  • This application has been known for a long time and is also documented in detail. However, there are some disadvantages to this application.
  • talc On the paper machine, mainly the sticky particles on the surface cause problems because they come into direct contact with the screens, felts and rollers. If talc is mixed into the fibrous material in front of the paper machine, particles are also encased which are ultimately inside the paper web and would not have any adverse effects. This unnecessarily increases talc consumption. The higher the basis weight, the more uneconomical the use of talc in the fiber mass becomes.
  • Paper properties such as porosity, bending stiffness or density are also influenced by the correspondingly high addition of talc in the mass.
  • talc or talc-containing products which is characterized in that the talc or the talc-containing products in the form of an aqueous dispersion which optionally contains auxiliaries in the wire section per se known paper or Cardboard machine can be applied to the paper or cardboard web.
  • the application is carried out by spraying.
  • the talcum losses due to discharge during fiber processing are avoided, which reduces the amounts used.
  • talcum in summary, the use of talcum according to the invention can therefore significantly reduce the required amount, which at the same time minimizes the undesirable side effects.
  • the use of talcum is economically more sensible.
  • talc is a non-renewable, mineral raw material, resources are conserved and the environment is relieved by less mining, transport and disposal.
  • the paper itself is more recyclable due to the lower mineral content, since inorganic waste materials are usually excreted and disposed of during waste paper recycling.
  • talc or talc-containing products are used in the form of an aqueous dispersion of talc or talc-containing products (hereinafter also referred to as "solid Substances "denotes) m water, also called slurry.
  • the dispersion can contain, in addition to talc and the talc-containing products, auxiliaries, such as, for example, dispersing agents.
  • the aqueous dispersion which may contain auxiliaries, has a talc or talc-containing product content of 2% by weight to 40% by weight. -% on.
  • Adequate dispersion and breakdown of existing agglomerates of the solid must also be ensured, since on the one hand these can lead to blockages in the application nozzles and on the other hand to unevenness on the paper web.
  • the viscosity of the dispersion must be low so that it can be pumped and sprayed without problems.
  • the dispersion is pumped from a storage tank by means of a pump via lines to the paper machine. It is important to ensure that the pump pulsates as little as possible to ensure that the dosage is uniform.
  • a suitable fine filter must be installed in the line to prevent any contamination of the nozzles by coarse particles. Incorrectly dimensioned filters can lead to undesired sludge formation in the filter.
  • the dispersion is evenly distributed over the running paper web via spray cans. There are several points to consider when choosing a nozzle.
  • the spray jet must generate as little impact pressure as possible so that the uniformity of the paper surface is not impaired.
  • the nozzle opening must be large enough so that it cannot be clogged by talc particles, but it must also be precisely matched to the order quantity.
  • the material must withstand permanent exposure to minerals. Avoid droplets that are too fine to avoid nebulization and to prevent the talcum dispersion from being carried over.
  • the spray angle must be adapted to the speed of the paper web. The spray pattern must ensure an even application across the entire web width.
  • the screen section of the paper or board machine is selected as the spraying location, i.e. after the headbox and before the paper web reaches the press section.
  • the aqueous dispersion is thus sprayed out at a completely different point in the paper production process than when talcum and talcum-containing products are used for the surface treatment of paper.
  • Talc and talc-containing products are sprayed onto the paper after the press section and before drying.
  • the positioning above the wire section influences the influence of the spray jet on the paper surface, which must be kept low.
  • the preferred positioning above the wire section can easily be determined by an average specialist depending on the paper machine used.
  • a spray pipe is installed across the paper machine transversely to the running direction, to which a number of spray cans adapted to the machine width is connected.
  • the nozzles can also be attached and connected in some other way.
  • the application quantity is selected depending on the content of sticky impurities or the problems that occur on the paper machine.
  • the application amount of talc or talc-containing products is 0.1 g / m 2 to 2.0 g / m 2 paper surface.
  • the invention further relates to a process for the production of paper, cardboard, cardboard or the like.
  • a talcum dispersion was sprayed into the wire section on an approximately 3 meter wide paper machine.
  • the order quantities were between 0.15 g / m ⁇ and 1.1 g / m ⁇ .
  • the solids content (talcum content) of the dispersion was between 24 and 125 g / 1 (2.4-12.5% by weight).
  • a constant machine run could be achieved, there were fewer fluctuations in the observed parameters.
  • the deposits on the cylinders could be reduced.
  • the contamination of screens and felts was also less. There were no negative influences on the paper quality.
  • talc includes, in particular also when used alone, any type of talc, treated talc and products containing talc, such as chlorite alkali, magnesium silicate hydrate according to DIN 55924 and cationized talc.
  • paper when used alone includes paper, cardboard, cardboard and the like. Products.
  • paper machine also includes machines for producing cardboard.

Abstract

The invention relates to the use of talcum, or products containing talcum as additives in the manufacture of paper. The additive is sprayed, in the form of an aqueous dispersion which optionally contains auxiliary agents, onto the paper or card web in the screen section of known paper or card-manufacturing equipment. The invention also relates to a method for said application, in which the additive is used in the aforementioned manner. The invention provides a more economical and environmentally friendlier use of talcum, or products containing talcum.

Description

Verwendung von Talkum bei der Papierherstellung und Verfahren dazu Use of talc in papermaking and process therefor
Die vorliegende Erfindung betrifft die Verwendung von Talkum oder talkumhaltigen Produkten als Additiv bei der Herstellung von Papier, Pappe, Karton oder dgl. Produkten aus Fasermaterial sowie ein derartiges Verfahren.The present invention relates to the use of talc or talc-containing products as an additive in the production of paper, cardboard, cardboard or the like. Products made of fiber material and to such a method.
Bei der Herstellung von Papier, Pappe, Karton oder dgl. Produk- ten aus Fasermaterial kommen Rohstoffe zum Einsatz, welche zumeist klebrige Verunreinigungen enthalten. Dies sind z.B. Baumharz aus dem eingesetzten Holz oder zahlreiche klebrige Materialien, welche im Altpapier zu finden sind. Diese klebrigen Verunreinigungen können zu Ablagerungen an der Papiermaschine, insbesondere auf Sieben, Filzen, Pressen- und Trockenzylindern, führen und in weiterer Folge Produktionsstörungen an der Papiermaschine verursachen. Zusätzlich können fest im Papier verankerte klebrige Partikel an Teilen der Papiermaschine haften bleiben und so zu Bahnabrissen führen. Diese Bahnabrisse, die Verlegung von Sieben und Filzen sowie die Zylinderablagerungen verursachen Kosten aufgrund einer geringeren Produktion, notwendiger Reinigungsstillstände und zusätzlicher Maßnahmen zur Reinhaltung von Zylindern.Raw materials, which mostly contain sticky impurities, are used in the manufacture of paper, cardboard, cardboard or similar products made of fiber material. These are e.g. Tree resin from the wood used or numerous sticky materials that can be found in the waste paper. These sticky contaminants can lead to deposits on the paper machine, especially on sieves, felts, press and drying cylinders, and subsequently cause production problems on the paper machine. In addition, sticky particles firmly anchored in the paper can stick to parts of the paper machine and thus lead to web breaks. These web breaks, the laying of screens and felts as well as the cylinder deposits cause costs due to lower production, necessary cleaning downtimes and additional measures to keep cylinders clean.
Um die negativen Auswirkungen klebriger Verunreinigungen bei der Herstellung von Papier oder dgl. zu vermeiden, werden seit langem Talkum und talkumhaltige Produkte als Additive eingesetzt, welche an verschiedenen Stellen bei der Faserstoffaufbereitung oder unmittelbar vor der Papiermaschine direkt in den Faserstoffbrei zugegeben werden. Als Talkum und talkumhaltige Produkte kommen alle beliebigen Talkumarten sowie beispielsweise Magnesiumsilicathydrat nach DIN 55924 oder kationisiertes Talkum zur Anwendung.In order to avoid the negative effects of sticky impurities in the production of paper or the like, talc and products containing talc have long been used as additives, which are added directly to the pulp pulp at various points in the pulp processing or directly in front of the paper machine. All talcum types, such as magnesium silicate hydrate according to DIN 55924 or cationized talcum, are used as talc and talc-containing products.
Das hydrophobe Talkum oder die hydrophoben talkumhaltigen Produkte werden an der Oberfläche der die klebrigen Verunreinigun- gen bildenden Teilchen adsorbiert, wobei diese vom Additiv idealerweise vollständig umhüllt werden. Die Klebrigkeit der Verunreinigungen wird somit verringert und im besten Fall beseitigt, wodurch die damit verbundenen Nachteile vermieden wer- den können. Diese Anwendung ist seit langem bekannt und auch ausführlich dokumentiert. Es gibt jedoch einige Nachteile dieser Anwendung.The hydrophobic talc or the hydrophobic talc-containing products are on the surface of the sticky contaminants. adsorbing gene-forming particles, which are ideally completely enveloped by the additive. The stickiness of the contaminants is thus reduced and, in the best case, eliminated, whereby the disadvantages associated therewith can be avoided. This application has been known for a long time and is also documented in detail. However, there are some disadvantages to this application.
Da während der Faserstoffaufbereitung Stoffverluste auftreten, z.B. in Sortierern, Cleanern, Flotationszellen oder Eindickern, wird auch ein Teil des Talkums ausgeschleust und ist somit an der Papiermaschine nicht mehr wirksam. Es muß also mehr Talkum eingesetzt werden, als letztlich an der Papiermaschine wirksam ist.Since material losses occur during the pulp processing, e.g. in sorters, cleaners, flotation cells or thickeners, part of the talc is also removed and is therefore no longer effective on the paper machine. So more talc must be used than is ultimately effective on the paper machine.
An der Papiermaschine verursachen hauptsächlich die klebrigen Teilchen an der Oberfläche Probleme, da diese unmittelbar mit den Sieben, Filzen und Walzen in Berührung kommen. Wird Talkum in den Faserstoff vor der Papiermaschine eingemischt, so werden auch Teilchen umhüllt, welche letztendlich im Inneren der Papierbahn sind und keine nachteiligen Auswirkungen zur Folge hätten. Dies erhöht den Talkumverbrauch unnötig. Je höher das Flächengewicht, desto unwirtschaftlicher wird der Talkumeinsatz in der Fasermasse.On the paper machine, mainly the sticky particles on the surface cause problems because they come into direct contact with the screens, felts and rollers. If talc is mixed into the fibrous material in front of the paper machine, particles are also encased which are ultimately inside the paper web and would not have any adverse effects. This unnecessarily increases talc consumption. The higher the basis weight, the more uneconomical the use of talc in the fiber mass becomes.
Bei Eintragung größerer Mengen von Talkum in den Faserbrei kann dies zu Festigkeitsverlusten beim Endprodukt führen. Reißlänge und Weiterreißfestigkeit können negativ beeinflußt werden.If larger amounts of talc are added to the pulp, this can lead to a loss of strength in the end product. Tear length and tear strength can be negatively affected.
Papiereigenschaften wie Porosität, Biegesteifigkeit oder Dichte werden durch entsprechend hohen Talkumzusatz in der Masse ebenfalls beeinflußt.Paper properties such as porosity, bending stiffness or density are also influenced by the correspondingly high addition of talc in the mass.
Die vorstehend erwähnten Probleme des Standes der Technik wer- den durch die erfindungsgemäße Verwendung von Talkum oder talkumhaltigen Produkten vermieden, welche sich dadurch auszeichnet, daß das Talkum oder die talkumhaltigen Produkte in Form einer wäßrigen, gegebenenfalls Hilfmittel enthaltenden, Dispersion in der Siebpartie einer an sich bekannten Papier- oder Kartonmaschine auf die Papier- oder Kartonbahn aufgebracht werden. In einer besonderen Ausführungsform der vorliegenden Erfindung erfolgt die Aufbringung durch Aufsprühen.The above-mentioned problems of the prior art are avoided by the use according to the invention of talc or talc-containing products, which is characterized in that the talc or the talc-containing products in the form of an aqueous dispersion which optionally contains auxiliaries in the wire section per se known paper or Cardboard machine can be applied to the paper or cardboard web. In a special embodiment of the present invention, the application is carried out by spraying.
Diese unmittelbar an einer Papiermaschine in der Siebpartie er- folgende Aufbringung auf die Papieroberfläche bietet zahlreiche Vorteile gegenüber dem Stand der Technik:This application to the paper surface directly on a paper machine in the wire section offers numerous advantages over the prior art:
Es werden die Talkumverluste durch Ausschleusung während der Faserstoffaufbereitung vermieden, wodurch die Einsatzmengen reduziert werden.The talcum losses due to discharge during fiber processing are avoided, which reduces the amounts used.
Darüber hinaus werden nur die klebrigen Verunreinigungen an der Oberfläche behandelt, was ebenfalls reduzierte Einsatzmengen zur Folge hat. So wird auch der Talkumeinsatz bei höheren Flächengewichten technologisch und wirtschaftlich sinnvoll.In addition, only the sticky contaminants on the surface are treated, which also results in reduced use. So the use of talcum with higher basis weights is technologically and economically sensible.
Da das Talkum kaum ins Innere der Papierbahn gelangt, werden auch die Festigkeiten nicht negativ beeinflußt.Since the talc hardly gets inside the paper web, the strengths are not adversely affected.
Weitere Papiereigenschaften, wie Steifigkeit oder Volumen, werden ebenfalls nicht beeinflußt.Other paper properties, such as stiffness or volume, are also not affected.
Zusammenfassend kann daher durch diese erfindungsgemäße Verwendung von Talkum die erforderliche Einsatzmenge deutlich redu- ziert werden, wodurch gleichzeitig die unerwünschten Nebenwirkungen minimiert werden. Der Talkumeinsatz wird wirtschaftlich sinnvoller .In summary, the use of talcum according to the invention can therefore significantly reduce the required amount, which at the same time minimizes the undesirable side effects. The use of talcum is economically more sensible.
Zusätzlich ist auch noch ein positiver Umweltaspekt zu erwähnen. Da es sich bei Talkum um einen nicht erneuerbaren, minera- lischen Rohstoff handelt, werden Ressourcen geschont und die Umwelt durch weniger Abbau, Transport und Entsorgung entlastet. Das Papier selbst wird durch den geringeren Mineralstoffgehalt besser wiederverwertbar, da beim Altpapierrecycling anorganische Feinstoffe meist ausgeschieden und entsorgt werden.In addition, a positive environmental aspect should also be mentioned. Since talc is a non-renewable, mineral raw material, resources are conserved and the environment is relieved by less mining, transport and disposal. The paper itself is more recyclable due to the lower mineral content, since inorganic waste materials are usually excreted and disposed of during waste paper recycling.
Erfindungsgemäß erfolgt die Verwendung von Talkum oder talkumhaltigen Produkten in Form einer wäßrigen Dispersion von Talkum oder talkumhaltigen Produkten (nachstehend auch als "Fest- Stoffe" bezeichnet) m Wasser, auch Slurry, genannt. Die Dispersion kann erforderlichenfalls neben Talkum und den talkumhaltigen Produkten Hilfsmittel, wie z.B. Dispergierhilfsmit- tel, enthalten. Bei der Herstellung der Dispersion ist ferner auf den richtigen, konstanten Feststoffgehalt zu achten, da dies ein Parameter zur Steuerung der Auftragsmenge ist. Der Gehalt an Feststoff ist ferner der Dosiermenge angepaßt. In einer bevorzugten Ausfuhrungsform der Erfindung weist die wäßrige, gegebenenfalls Hilfsmittel enthaltende, Dispersion einen Gehalt an Talkum oder talkumhaltigen Produkten von 2 Gew.-% bis 40 Gew.-% auf.According to the invention, talc or talc-containing products are used in the form of an aqueous dispersion of talc or talc-containing products (hereinafter also referred to as "solid Substances "denotes) m water, also called slurry. If necessary, the dispersion can contain, in addition to talc and the talc-containing products, auxiliaries, such as, for example, dispersing agents. When preparing the dispersion, care must also be taken to ensure the correct, constant solids content, since this The solids content is also adapted to the dosing amount In a preferred embodiment of the invention, the aqueous dispersion, which may contain auxiliaries, has a talc or talc-containing product content of 2% by weight to 40% by weight. -% on.
Zusatzlich ist auf eine ausreichend gute Dispergierung und Zerschlagung vorhandener Agglomerate des Feststoffes zu achten, da diese einerseits zu Verstopfungen der Auftragsdusen und ande- rerseits zu Unebenheiten auf der Papierbahn fuhren können. Die Viskosität der Dispersion muß gering sein, um problemlos gepumpt und gesprüht werden zu können.Adequate dispersion and breakdown of existing agglomerates of the solid must also be ensured, since on the one hand these can lead to blockages in the application nozzles and on the other hand to unevenness on the paper web. The viscosity of the dispersion must be low so that it can be pumped and sprayed without problems.
Die Dispersion wird aus einem Vorratstank mittels einer Pumpe über Leitungen zur Papiermaschine gepumpt. Hierbei ist darauf zu achten, daß die Pumpe möglichst wenig pulsiert, um die Gleichmäßigkeit der Dosierung zu gewahrleisten. In die Leitung muß ein geeigneter Feinfilter eingebaut werden, um allenfalls Verunreinigungen der Düsen durch grobe Teilchen zu verhindern. Falsch dimensionierte Filter können zu unerwünschter Schlamm- bildung im Filter fuhren.The dispersion is pumped from a storage tank by means of a pump via lines to the paper machine. It is important to ensure that the pump pulsates as little as possible to ensure that the dosage is uniform. A suitable fine filter must be installed in the line to prevent any contamination of the nozzles by coarse particles. Incorrectly dimensioned filters can lead to undesired sludge formation in the filter.
Die Dispersion wird über Sprühdosen gleichmäßig auf die laufende Papierbahn verteilt. Bei der Dusenauswahl sind mehrere Punkte zu beachten.The dispersion is evenly distributed over the running paper web via spray cans. There are several points to consider when choosing a nozzle.
Der Spruhstrahl muß möglichst wenig Aufpralldruck erzeugen, da- mit die Gleichmäßigkeit der Papieroberflache nicht beeinträchtigt wird. Die Dusenoffnung muß groß genug sein, damit sie nicht durch Talku teilchen verstopft werden kann, sie muß zusätzlich aber genau auf die Auftragsmenge abgestimmt sein. Das Material muß einer Dauerbelastung durch Mineralstoffe widerste- hen. Zu feine Tropfchen sind zu vermeiden, um eine Vernebelung und Verschleppung der Talkumdispersion zu verhindern. Der Aufsprühwinkel muß an die Geschwindigkeit der Papierbahn angepaßt sein. Das Sprühbild muß einen gleichmäßigen Auftrag über die ganze Bahnbreite gewährleisten.The spray jet must generate as little impact pressure as possible so that the uniformity of the paper surface is not impaired. The nozzle opening must be large enough so that it cannot be clogged by talc particles, but it must also be precisely matched to the order quantity. The material must withstand permanent exposure to minerals. Avoid droplets that are too fine to avoid nebulization and to prevent the talcum dispersion from being carried over. The spray angle must be adapted to the speed of the paper web. The spray pattern must ensure an even application across the entire web width.
Als Aufsprühort wird die Siebpartie der Papier- oder Kartonmaschine gewählt, also nach dem Stoffauflauf und bevor die Papierbahn die Pressenpartie erreicht. Das Ausprühen der wäßrigen Dispersion erfolgt somit an einer gänzlich anderen Stelle im Papierherstellungsverfahren als beim Einsatz von Talkum und talkumhaltigen Produkten zur Oberflächenvergütung von Papier. Dabei werden Talkum und talkumhaltige Produkte nach der Pressenpartie und vor der Trocknung auf das Papier aufgesprüht.The screen section of the paper or board machine is selected as the spraying location, i.e. after the headbox and before the paper web reaches the press section. The aqueous dispersion is thus sprayed out at a completely different point in the paper production process than when talcum and talcum-containing products are used for the surface treatment of paper. Talc and talc-containing products are sprayed onto the paper after the press section and before drying.
Die richtige Positionierung gewährleistet, daß das Talkum nicht zu tief in das Papier eindringt, aber dennoch an der Oberfläche gebunden ist. Außerdem beeinflußt die Positionierung über der Siebpartie den Einfluß des Sprühstrahls auf die Papieroberfläche, welcher gering gehalten werden muß. Die bevorzugte Positionierung über der Siebpartie ist von einem Durchschnittsfachmann in Abhängigkeit von der eingesetzten Papiermaschine leicht zu ermitteln.Correct positioning ensures that the talc does not penetrate too deep into the paper, but is still bound to the surface. In addition, the positioning above the wire section influences the influence of the spray jet on the paper surface, which must be kept low. The preferred positioning above the wire section can easily be determined by an average specialist depending on the paper machine used.
Über die Papiermaschine wird quer zur Laufrichtung ein Sprührohr installiert, an welchem eine der Maschinenbreite angepaßte Anzahl von Sprühdosen angeschlossen ist. Die Düsen können alternativ dazu auch anderweitig befestigt und angeschlossen wer- den. Die Auftragsmenge wird in Abhängigkeit vom Gehalt an klebrigen Verunreinigungen bzw. den an der Papiermaschine auftretenden Problemen gewählt. In einer bevorzugten Ausführungsform der Erfindung beträgt die Auftragsmenge an Talkum oder talkumhaltigen Produkten 0,1 g/m2 bis 2,0 g/m2 Papieroberfläche.A spray pipe is installed across the paper machine transversely to the running direction, to which a number of spray cans adapted to the machine width is connected. Alternatively, the nozzles can also be attached and connected in some other way. The application quantity is selected depending on the content of sticky impurities or the problems that occur on the paper machine. In a preferred embodiment of the invention, the application amount of talc or talc-containing products is 0.1 g / m 2 to 2.0 g / m 2 paper surface.
Die Erfindung betrifft ferner ein Verfahren zur Herstellung von Papier, Pappe, Karton oder dgl. Produkten aus Fasermaterial, worin Talkum oder talkumhaltige Produkte als Additiv in Form einer wäßrigen, gegebenenfalls Hilfsmittel enthaltenden, Dispersion aufgesprüht werden, wobei die wäßrige, gegebenenfalls Hilfsmittel enthaltende, Dispersion von Talkum oder talku - haltigen Produkten in der Siebpartie einer an sich bekannten Papier- oder Kartonmaschine auf die Papier- oder Kartonbahn aufgesprüht wird.The invention further relates to a process for the production of paper, cardboard, cardboard or the like. Products made of fiber material, in which talcum or talcum-containing products are sprayed on as an additive in the form of an aqueous dispersion which optionally contains auxiliaries, the aqueous dispersion optionally containing auxiliaries of talc or talku - containing products in the wire section of a paper or board machine known per se is sprayed onto the paper or board web.
Die vorliegende Erfindung wird anhand des nachstehenden Bei- spiels weiter erläutert.The present invention is further explained on the basis of the example below.
Beispielexample
Es wurde an einer etwa 3 Meter breiten Papiermaschine eine Talkumdispersion in der Siebpartie aufgesprüht. Die Auftragsmengen lagen zwischen 0,15 g/m^ und 1,1 g/m^ . Der Feststoff- gehalt (Gehalt an Talkum) der Dispersion lag zwischen 24 und 125 g/1 (2,4-12,5 Gew.- ). Es konnte ein konstanter Maschinen- lauf erzielt werden, es gab weniger Schwankungen der beobachteten Parameter. Die Ablagerungen an den Zylindern konnten verringert werden. Die Verschmutzung von Sieben und Filzen war ebenso geringer. Es waren keine negativen Einflüsse auf die Papierqualität zu beobachten.A talcum dispersion was sprayed into the wire section on an approximately 3 meter wide paper machine. The order quantities were between 0.15 g / m ^ and 1.1 g / m ^. The solids content (talcum content) of the dispersion was between 24 and 125 g / 1 (2.4-12.5% by weight). A constant machine run could be achieved, there were fewer fluctuations in the observed parameters. The deposits on the cylinders could be reduced. The contamination of screens and felts was also less. There were no negative influences on the paper quality.
Vergleichbare Vorteile werden auch bei Verwendung von behandeltem Talkum oder talkumhaltigen Produkten erzielt.Comparable advantages are also achieved when using treated talc or products containing talc.
Im Rahmen dieser Erfindung umfaßt der Begriff "Talkum", insbesondere auch bei alleiniger Verwendung, alle beliebigen Talkumarten, behandeltes Talkum sowie talkumhaltige Produkte, wie Chlorittalkum, Magnesiumsilicathydrat nach DIN 55924 und kationisiertes Talkum.In the context of this invention, the term “talc” includes, in particular also when used alone, any type of talc, treated talc and products containing talc, such as chlorite alkali, magnesium silicate hydrate according to DIN 55924 and cationized talc.
Ebenso umfaßt der Begriff "Papier" bei alleiniger Verwendung neben Papier auch Karton, Pappe und dgl. Produkte. Vom Begriff "Papiermaschine" werden schließlich auch Maschinen zur Kartonherstellung umfaßt. Likewise, the term "paper" when used alone includes paper, cardboard, cardboard and the like. Products. Finally, the term "paper machine" also includes machines for producing cardboard.

Claims

Patentansprüche claims
1. Verwendung von Talkum oder talkumhaltigen Produkten als Additiv zur Inertisierung klebriger Verunreinigungen bei der1. Use of talc or talc-containing products as an additive for inerting sticky contaminants in the
Herstellung von Papier, Pappe, Karton oder dgl. Produkten aus Fasermaterial, wobei das Talkum oder die talkumhaltigen Produkte in Form einer wäßrigen, gegebenfalls Hilfsmittel enthaltenden, Dispersion eingesetzt werden, dadurch gekennzeichnet, daß die Dispersion in der Siebpartie einer an sich bekannten Papier- oder Kartonmaschine auf die Papier- oder Kartonbahn durch Aufsprühen aufgebracht wird.Production of paper, cardboard, cardboard or the like. Products made of fiber material, the talc or the talc-containing products being used in the form of an aqueous dispersion, optionally containing auxiliaries, characterized in that the dispersion in the wire section of a known paper or Cardboard machine is applied to the paper or cardboard web by spraying.
2. Verwendung nach Anspruch 1, dadurch gekennzeichnet, daß die wäßrige, gegebenenfalls Hilfsmittel enthaltende, Dispersion einen Gehalt an Talkum oder talkumhaltigen Produkten von 2 Gew.-% bis 40 Gew.-% aufweist.2. Use according to claim 1, characterized in that the aqueous dispersion, optionally containing auxiliaries, has a content of talc or talc-containing products of 2% by weight to 40% by weight.
3. Verwendung nach Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Auftragsmenge an Talkum oder talkumhaltigen Produkten 0,1 g/m2 bis 2,0 g/m2 Papieroberfläche beträgt.3. Use according to claims 1 or 2, characterized in that the application amount of talc or talc-containing products is 0.1 g / m 2 to 2.0 g / m 2 paper surface.
4. Verfahren zur Herstellung von Papier, Pappe, Karton oder dgl. Produkten aus Fasermaterial, worin Talkum oder talkumhaltigen Produkte als Additiv zur Inertisierung klebriger Verunreinigungen in Form einer wäßrigen, gegebenenfalls Hilfsmittel enthaltenden, Dispersion eingesetzt werden, dadurch gekenn- zeichnet, daß die Dispersion von Talkum oder talkumhaltigen Produkten in der Siebpartie einer an sich bekannten Papieroder Kartonmaschine auf die Papier- oder Kartonbahn aufgesprüht wird. 4. A process for the production of paper, cardboard, cardboard or the like. Products made of fiber material, in which talc or products containing talc are used as an additive for inertizing sticky impurities in the form of an aqueous dispersion which may contain auxiliaries, characterized in that the dispersion of talc or talc-containing products is sprayed onto the paper or cardboard web in the wire section of a paper or board machine known per se.
PCT/AT2000/000191 1999-07-09 2000-07-10 Use of talcum in the manufacture of paper and a method for the same WO2001004417A1 (en)

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AT119799 1999-07-09

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US7208429B2 (en) 2004-12-02 2007-04-24 The Procter + Gamble Company Fibrous structures comprising a nonoparticle additive
US7459179B2 (en) 2004-12-02 2008-12-02 The Procter & Gamble Company Process for making a fibrous structure comprising an additive
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