EP3239397B1 - Procédé et installation de fabrication d'un produit plat en fibres imprégnées - Google Patents

Procédé et installation de fabrication d'un produit plat en fibres imprégnées Download PDF

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Publication number
EP3239397B1
EP3239397B1 EP17168108.3A EP17168108A EP3239397B1 EP 3239397 B1 EP3239397 B1 EP 3239397B1 EP 17168108 A EP17168108 A EP 17168108A EP 3239397 B1 EP3239397 B1 EP 3239397B1
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EP
European Patent Office
Prior art keywords
pulp
lane
unit
impregnation
impregnating agent
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.)
Active
Application number
EP17168108.3A
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German (de)
English (en)
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EP3239397A1 (fr
Inventor
Jukka Valkama
Tero Tervahartiala
Hans Grundberg
Heikki Sojakka
Petteri Piltonen
Kaarlo Niskanen
Magnus Norgren
Bo Westerlind
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Plafco Fibertech Oy
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Plafco Fibertech Oy
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Publication date
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Priority to PL17168108T priority Critical patent/PL3239397T3/pl
Publication of EP3239397A1 publication Critical patent/EP3239397A1/fr
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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
    • 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
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/07—Nitrogen-containing compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/09—Sulfur-containing compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/64—Alkaline compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums
    • 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
    • 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
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/34—Knife or blade type coaters
    • D21H23/38—Knife or blade type coaters the fluid material being applied with a special device, e.g. with a roll in a flooded-nip inverted blade coater
    • 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
    • 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
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/06—Vegetable or imitation parchment; Glassine paper

Definitions

  • the invention relates to the field of flat pulp products such as finished papers. These are the starting products for packaging of goods, in particular of food or cosmetics, at least of sensitive goods.
  • the packaging has a protective function. It protects the contents against outside influences, for example against dirt, bacteria, decomposition by light, penetration of moisture.
  • the packaging must also be such that it does not itself adversely affect its contents. This may be the case with any type of plastic, for example, whether in the form of plastic film or in the form of coatings on a substrate such as paper or cardboard.
  • the packaging should maintain the consistency of the contents, for example, avoid the escape of moisture in aqueous or gaseous or vaporous form.
  • packaging must be environmentally friendly. It must be disposed of inexpensively and in a harmless manner. Finally, it must be inexpensive to produce.
  • WO 2008/084 139 A1 describes a method for producing packaging material with improved strength and barrier properties for food. This involves treating a fibrous web with a liquid that dissolves cellulose. These are aqueous solutions of alkalis, acids and their salts.
  • DE 502 129 A describes the application of liquids on fibrous webs in dipping baths or in nips or through nozzles.
  • the invention has for its object to provide a method and a system with which the above problems are solved, that is with what packaging materials can be produced that meet the aforementioned protective function with respect to the content, and which are inexpensive in every respect.
  • the end product should have a high strength and at the same time be pore-free and leak-tight, so that it offers the longest possible protection for the goods to be packaged.
  • a paper sheet produced on a paper machine has pores remaining between the individual fibers.
  • the pores can be closed by adding fillers to the paper stock suspension. This closes spaces between adjacent fibers.
  • the filler is not evenly distributed in the fibrous sheet. Rather, it comes to local clusters, but also to areas where little or at least too little filler is present. If too much filler is present, it means a waste of the relatively expensive filler, and if there is too little filler, the pores are between the cellulose fibers open, which means that the final product does not provide perfect protection of the packaged goods.
  • the fibers or cellulose-containing material are dissolved, but not dissolved.
  • the term "fibers” in the context of the invention generally refers to cellulose-containing material, since it does not necessarily have fiber structure. If fibers are mentioned here, this also means microfibrillated or nanocrystalline cellulose. When dissolved, a certain amount of dissolved cellulose is formed. This quantum fills in the spaces between adjacent fibers. The pores in the finished pulp product disappear with it.
  • This process is perfected by the pressing according to the invention. The pressing must take place during the impregnation. So it takes place during the impregnation, that is, during the presence of impregnating agent. It is crucial that the pressing increases the wet strength of the product.
  • the period of impregnation plays a role. If the impregnation time is too low, the amount of cellulose that has gone into solution is insufficient to completely fill the spaces between adjacent fibers. This is disadvantageous in various uses of the final product, e.g. when used as packaging material. Other uses are conceivable, for example as a building material. If the impregnation time is too long, a closed film of dissolved cellulose is formed. This leads to a cellulose film or a cellulose film as the end product. The final product has a certain brittleness.
  • the impregnating agent can always dissolve or dissolve only a limited amount of cellulose. If a larger amount of impregnating agent is allowed to act on the web of cellulosic fibers for a long time, for example several days, the said cellulose film is formed.
  • the long impregnation period also means a long duration of the production process.
  • known system comprises a roller frame 1. It can be seen three roles, which are mounted vertically one above the other. They each carry an untreated fibrous web. They are freely rotatable so that the individual fibrous web can be unrolled in the direction of the arrow.
  • roller frame 1 is followed by a trough 2 for receiving an impregnating bath. It can be seen deflecting rollers over which the three fibrous webs are led out on their way from the roller frame 1 to the tub 2 and 2 from the tub.
  • the untreated fibrous webs contain cellulose or hemicellulose of any kind, produced from any plants.
  • the individual web can consist of pure cellulose, but also of mixtures or of materials such as groundwood, which contains, inter alia, cellulose and lignin. They may also be regenerated cellulose filaments, films, woven fabrics, nonwovens, composite fibers, or functional materials of protein / cellulose, chitin / cellulose, konjacglucomannan / cellulose, nano-crystallized particles / cellulose, etc.
  • known plant may be part of a paper machine, optionally in a modified form namely the drying section of a paper machine.
  • the dryer section comprises a plurality of cylinders of a dryer section of a paper machine.
  • the drying cylinders are in turn wrapped by a fibrous web 3, such that they form a kind of meander.
  • the drying cylinders are flowed through by superheated steam, so that the lateral surfaces of the cylinders assume a high temperature and the moist fibrous web is heated when the cylinders are wrapped around it and thus dried.
  • known plant again represents a combination of parts of a paper machine and a plant for impregnating a fibrous web.
  • a fibrous web is brought to a felt, which was previously produced in the usual way, by means of a so-called headbox and one subsequent wire section.
  • the fibrous web is passed through a first press 4, between felt webs 4.1 and 4.2.
  • the fibrous web is then delivered to an impregnating station, which in turn comprises an impregnating trough 2.
  • a felt loop 2.1 serves to remove the fibrous web from the first press 4, to pass through the impregnating bath and to transfer to a felt web 40.1 of a second pressing station 40.
  • a partial dissolution (dissolution) of the cellulose takes place in the case of the substances mentioned here. It is a plasticizing process.
  • the temperature of the impregnation process is between minus 0 and minus 20 ° C. Also, a range between these two values is conceivable, for example between minus 2 and minus 18 ° C, or minus 10 and minus 15 ° C or any other intermediate value.
  • the application of the cold solution to the fibrous web leads to a rapid dissolution of the pulp.
  • the dissolved cellulose fills and closes spaces between the particles of the fibrous web, that is, between adjacent fibers. The process significantly increases the tensile strength of the fibrous web and its extensibility.
  • the first four cylinders 6.1 - 6.4 can be connected to a coolant so that the fibrous web is not heated but cooled.
  • the system also has a trough 2 for receiving an impregnating bath.
  • a press 4 formed of two parallel juxtaposed press rollers, which form a press nip with each other.
  • the press rolls are thus in the impregnating bath.
  • the increased tensile stress is generated in that a roller looped around by the fibrous web has a higher rotational speed than an upstream roller, which is likewise looped around by the fibrous web.
  • the speed difference may e.g. between 0.1 and 3%.
  • washing station 5 Furthermore, a washing station 5 can be seen.
  • the downstream three cylinders 6.5, 6.6, 6.7 are steam-heated, just like in normal operation of a paper machine.
  • the cylinders are normal drying cylinders that can be switched on and off or cooled.
  • the plant operates as follows: First, the fibrous web 3 passes through the cooling section, formed from the four cooled cylinders 6.1, 6.2, 6.3, 6.4. Not all four have to be cooled. Rather, it may also be sufficient to cool only one, two or three of these, in any case, those rollers should be cooled, to which the impregnating agent is applied. Then, the fibrous web runs into the trough 2 (impregnation station), and in this case through the nip of the press 4. It is thereby impregnated by impregnating agent, which is located in the tub 2, and at the same time pressed.
  • the washing station 5 contains water or another neutralizing agent. Here again a neutralization of the fibrous web 3 takes place. In the last three cylinders 6.5, 6.6 and 6.7, the impregnated fibrous web 3 is dried.
  • the impregnating bath has the great advantage that the fibrous web to be treated is impregnated completely with impregnating agent.
  • a disadvantage of the impregnating bath is that due to the relatively large mass of the bath, the cooling capacity must be quite considerable. It is very energy consuming.
  • FIG. 4 A first alternative is in FIG. 4 shown.
  • a paper machine comprising a first unit 1 for providing a fibrous web.
  • the unit 1 comprises a headbox 1.1. This has - seen perpendicular to the plane - an extension equal to the width of the fibrous web to be produced.
  • the headbox injects a suspension of fibers into a gap between two mesh loops 1.2 and 1.3.
  • the fibrous web is dewatered between these two wire loops and passed through two press rolls at the upper end of the unit 1.
  • the fibrous web thus formed is still very moist. It is sent to a pressing station 4 with two Press rollers 4.1 and 4.2 delivered, again led by felting two felt loops.
  • the fibrous web then passes to a dryer section 6 analogous to that according to FIG. 2 , with five drying cylinders 5.1 to 5.5.
  • the decisive treatment according to the invention takes place by means of a first nozzle unit 20.
  • the nozzle unit comprises a multiplicity of nozzles which extend over the width of the fibrous web to be treated-perpendicular to the plane of the drawing.
  • an impregnating agent is applied by being sprayed directly onto the fibrous web.
  • the impregnating agent in turn has the above-cited very low temperatures of between minus 1 ° and minus 20 ° C.
  • the impregnating nozzles 20 are followed by neutralizing nozzles 50, which can be designed in the same way as the impregnating nozzles.
  • the nozzle principle is much less expensive than the trough principle, because the cooling process is limited only to the cooling of the sprayed impregnating agent, thus a comparatively small amount of impregnating agent. In any case, a sump of impregnant should form. See the FIGS. 5 to 7 ,
  • FIGS. 5, 6 and 7 are each provided two rollers, which are arranged parallel to each other and together form a gap.
  • the two rollers are in the same horizontal plane, so that the fibrous web 3 runs vertically from top to bottom or from bottom to top through the gap.
  • the two rollers in different horizontal planes, so that the fibrous web runs at an angle to the horizontal.
  • the gap may be a press nip, so the passed-through fibrous web 3 is simultaneously subjected to a squeezing or pressing process.
  • an impregnating agent In the embodiment according to FIG. 5 is placed in the nip on both sides of the fibrous web 3, an impregnating agent. This is absorbed by the fibrous web 3 by the fiber web soaks it. The amount of impregnating agent in the gap must be continuously refilled, which is done by a feed unit, not shown.
  • the fibrous web is thus according to the embodiment according to FIG. 5 impregnated on both sides with impregnating agent.
  • the two rollers are again arranged such that the fibrous web 3 extends at a certain inclination against the horizontal (and at the same time against the vertical) through the nip.
  • impregnating agent is applied to the lateral surface of each roller. See the two impregnation nozzles 2.1, which extend over the entire length of each roller.
  • the applied layer of the impregnating agent is transported to the nip during circulation of the rolls and applied there to both sides of the fibrous web 3.
  • the amount of impregnating agent can be particularly sparingly and accurately metered applied to the fibrous web 3.
  • the application nozzles 2.1 and thus also the impregnating agent can be cooled.
  • a fibrous web 3 is passed through the nip.
  • Each roller is associated with a spray nozzle 2.1.
  • This can also be a slot nozzle. It may comprise a tube which is parallel to the roll axes and has a slot which extends over the working width of the roll and supplies impregnating agent to the shell surface of the roll.
  • a fibrous web to be impregnated can be produced according to the invention in any way, for example by the so-called foaming process.
  • a foam of water and cellulose-containing materials is placed in a paper machine on the rotating screen belt.
  • the remaining process steps or features are designed as indicated in this document.
  • a plant in which cellulose fibers are assumed to be foam-like, thus has the features as specified in the claims, in particular an impregnating unit, a cooling unit, optionally a drying unit and a neutralization unit.
  • the impregnating agent itself can be cooled or heated.
  • the involved mechanical engineering elements can be set in a corresponding temperature, for example when using a roller press the rollers.
  • the entire impregnation unit may be enclosed by a housing that either cools or heats.
  • the impregnating agent can be recycled. This applies, for example, to the impregnation unit with a dip tank. It also applies to those impregnating units used in the FIGS. 5 to 7 are shown, with two rollers forming a nip with each other.
  • the impregnating agent Over the course of the operating life there is always a loss of impregnating agent. Thus, a substantial proportion of the impregnating agent is absorbed by the fibrous web. Another part evaporates. In the impregnating units according to the FIGS. 5 to 7 Another part of the impregnating agent is taken along at the exit from the nip of the fibrous web. This portion can be collected in a tub and returned to the entry of the nip. In such a recycling process (circulation circuit), the impregnating agent is enriched with dissolved cellulose over a certain period of operation. The degree of enrichment can be measured. On the basis of the measurement result, the composition of the impregnating agent or its throughput (amount per unit time) can be regulated.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Claims (15)

  1. Procédé de fabrication d'un produit à base de pâte à papier imprégné à plat, comprenant les étapes de procédé suivantes :
    1.1 Fourniture d'une nappe fibreuse, contenant de la cellulose ;
    1.2 Imprégnation de la nappe fibreuse avec un agent d'imprégnation à base de solution cellulosique ;
    1.3 L'imprégnation est réalisée en mouillant complètement ou en plongeant la nappe fibreuse dans l'agent d'imprégnation ;
    1.4 L'imprégnation est réalisée avec pressage simultané de la nappe fibreuse dans l'agent d'imprégnation ;
    1.5 Le procédé d'imprégnation dure au maximum 60 s ;
    1.6 L'agent d'imprégnation contient au moins une des substances suivantes : Urée, thiourée, NaOH ou leurs sels métalliques ;
    1.7 La température dans la zone de pressage est comprise entre 0 et moins 20 °C.
  2. Procédé selon la revendication 1, comprenant les étapes de procédé supplémentaires :
    2.1 Neutralisation/lavage de la nappe fibreuse imprégnée ;
    2.2 Traitement ultérieur de la nappe fibreuse neutralisée en produit fibreux.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'imprégnation de la nappe fibreuse a lieu par passage dans un bain d'immersion.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que l'imprégnation a lieu par pulvérisation de l'agent d'imprégnation sur au moins une surface latérale de la nappe fibreuse.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que le pressage de la nappe fibreuse est effectué en la faisant passer par un espace pinceur formé par deux rouleaux parallèles juxtaposés qui tournent dans le sens opposé.
  6. Procédé selon la revendication 5, caractérisé en ce que l'agent d'imprégnation est appliqué sur les surfaces enveloppantes d'au moins un des rouleaux ou dans l'espace pinceur ou délivré sur la surface latérale correspondante de la nappe fibreuse, ou dans lequel l'agent d'imprégnation est appliqué directement par des buses sur au moins une des surfaces de la nappe fibreuse.
  7. Procédé selon l'une des revendications 2 à 6, caractérisé en ce que la neutralisation est réalisée en faisant passer la nappe fibreuse dans un bain neutralisant ou en pulvérisant un agent neutralisant à travers la nappe fibreuse.
  8. Procédé selon l'une des revendications 2 à 7, caractérisé en ce que la nappe fibreuse est séchée après neutralisation.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que la bande fibreuse est en outre traitée après neutralisation ou séchage.
  10. Procédé selon l'une des revendications 1 à 9, caractérisé en ce qu'une contrainte de traction est appliquée sur la nappe fibreuse avant, pendant ou après l'imprégnation.
  11. Système de production d'un produit à base de pâte à papier imprégné à plat au moyen d'une ou de plusieurs étapes du procédé des revendications 1 à 10, comprenant les caractéristiques suivantes :
    11.1 une unité de formation de nappe pour former une nappe fibreuse contenant de la cellulose ;
    11.2 une unité d'imprégnation pour imprégner la nappe fibreuse à l'aide d'un agent d'imprégnation à base de solution cellulosique ;
    11.3 une unité de pressage pour presser la nappe fibreuse ;
    11.4 une unité de refroidissement pour le refroidissement direct ou indirect de l'agent d'imprégnation de 0 à moins 20° en utilisant un agent d'imprégnation basique tel que l'urée, la thiourée, NaOH ou leurs sels métalliques ;
    11.5 une presse pour presser la nappe fibreuse disposée à l'intérieur de l'unité d'imprégnation.
  12. Système selon la revendication 11, caractérisé par les particularités suivantes :
    12.1 une unité de neutralisation en amont ou en aval d'une unité de séchage pour neutraliser la nappe fibreuse imprégnée ;
    12.2 un dispositif pour le traitement ultérieur de la nappe fibreuse neutralisée.
  13. Système selon la revendication 12, caractérisé par les particularités suivantes :
    13.1 l'unité d'imprégnation et l'unité de neutralisation sont les composants d'une machine à papier ou d'une machine offline ;
    13.2 l'unité d'imprégnation est connectée entre l'unité de formation de nappe et l'unité de neutralisation ;
    13.3 l'unité de neutralisation est connectée en aval de l'unité d'imprégnation.
  14. Système selon l'une des revendications 11 ou 12, caractérisé en ce que l'unité d'imprégnation comprend un bain d'immersion avec un agent d'imprégnation contenu dans celui-ci pour faire passer la nappe fibreuse.
  15. Système selon l'une des revendications 11 à 14, caractérisé par les particularités suivantes :
    15.1 l'unité d'imprégnation comporte deux rouleaux, disposés parallèlement l'un à l'autre et forment ensemble un espace pinceur pour faire passer la nappe fibreuse ;
    15.2 il est prévu une unité d'alimentation pour fournir un agent d'imprégnation sur la surface enveloppante d'au moins l'un des deux rouleaux ou dans l'espace pinceur ;
    15.3 l'unité de refroidissement est connectée de manière opérationnelle à l'unité d'alimentation pour le refroidissement direct de l'agent d'imprégnation.
EP17168108.3A 2016-04-28 2017-04-26 Procédé et installation de fabrication d'un produit plat en fibres imprégnées Active EP3239397B1 (fr)

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PL17168108T PL3239397T3 (pl) 2016-04-28 2017-04-26 Sposób i instalacja do wytwarzania produktu z materiału włóknistego impregnowanego na powierzchni

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DE102016205954.8A DE102016205954A1 (de) 2016-04-28 2016-04-28 Verfahren und Anlage zum Herstellen eines flächigen imprägnierten Faserstoffproduktes

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EP3239397A1 EP3239397A1 (fr) 2017-11-01
EP3239397B1 true EP3239397B1 (fr) 2019-06-12

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DE (1) DE102016205954A1 (fr)
DK (1) DK3239397T3 (fr)
ES (1) ES2744811T3 (fr)
PL (1) PL3239397T3 (fr)
PT (1) PT3239397T (fr)

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ES2744811T3 (es) 2020-02-26
DK3239397T3 (da) 2019-09-23
PL3239397T3 (pl) 2020-03-31
DE102016205954A1 (de) 2017-11-02
EP3239397A1 (fr) 2017-11-01
PT3239397T (pt) 2019-09-26

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