EP2844797A1 - Procédé de couchage d'une bande de papier continue - Google Patents

Procédé de couchage d'une bande de papier continue

Info

Publication number
EP2844797A1
EP2844797A1 EP13715691.5A EP13715691A EP2844797A1 EP 2844797 A1 EP2844797 A1 EP 2844797A1 EP 13715691 A EP13715691 A EP 13715691A EP 2844797 A1 EP2844797 A1 EP 2844797A1
Authority
EP
European Patent Office
Prior art keywords
paper web
layer
web
paper
coating
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.)
Granted
Application number
EP13715691.5A
Other languages
German (de)
English (en)
Other versions
EP2844797B1 (fr
Inventor
Peter Hauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vits Technology GmbH
Original Assignee
Vits Technology 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 Vits Technology GmbH filed Critical Vits Technology GmbH
Priority to PL13715691T priority Critical patent/PL2844797T3/pl
Publication of EP2844797A1 publication Critical patent/EP2844797A1/fr
Application granted granted Critical
Publication of EP2844797B1 publication Critical patent/EP2844797B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • 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
    • D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
    • 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
    • D21H17/47—Condensation polymers of aldehydes or ketones
    • D21H17/48—Condensation polymers of aldehydes or ketones with phenols
    • 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
    • D21H17/47—Condensation polymers of aldehydes or ketones
    • D21H17/49—Condensation polymers of aldehydes or ketones with compounds containing hydrogen bound to nitrogen
    • D21H17/51—Triazines, e.g. melamine
    • 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
    • D21H19/10—Coatings without pigments
    • D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating
    • D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/18—Paper- or board-based structures for surface covering
    • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
    • D21H27/24—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the surface to be covered being phenolic-resin paper laminates, vulcan fibre or similar cellulosic fibreboards
    • 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
    • D21H27/18—Paper- or board-based structures for surface covering
    • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
    • D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures

Definitions

  • the invention relates to a method for coating a paper web.
  • Such methods are known per se. They are used to make cover layers for laminates of sheets and at least one layer of impregnated paper. This cover layer should on the one hand have a predetermined decor and on the other hand have favorable physical and / or chemical properties such as abrasion and / or scratch resistance and resistance to water and chemicals. For this reason, predominantly expensive melamine resins have hitherto been used in practice for impregnation.
  • Such coated and / or impregnated paper webs are known per se and are used e.g. used as furniture foils or for floor laminate. Here, high demands are placed on the quality.
  • the decorative papers are impregnated with the melamine resin and dried with warm air.
  • the substrate e.g. a chipboard
  • the melamine resin causes the surface to be scratch-resistant and ensures that the decorative paper is securely bonded to the substrate.
  • the much cheaper urea resin can be used for a first impregnation.
  • the impregnated web must be coated on both sides with melamine resin in order to achieve the required surface properties of the laminate and to ensure the bonding with the flap. This is labor intensive and consumes more of the more expensive melamine resin than required for surface finish.
  • WO 2008/134823 A1 describes a process for producing impregnated paper in which a urea resin is used for impregnation.
  • the drying takes place by means of near-infrared rays, crosslinking of the resin being largely avoided.
  • the low cross-linking allows for the compression of the impregnated with the urea resin film with the substrate, that a secure bonding takes place.
  • a disadvantage of the method is that the required reliability is not given.
  • expensive electrical I need energy.
  • spots of different colors are dried differently due to the different absorption and reflection, so that the web as a whole has an uneven moisture content.
  • urea resin does not have the required mechanical stability and therefore wears too quickly. Therefore, it is necessary to coat one surface of the laminate with a higher quality layer of e.g. To provide melamine resin. In the case of floor laminates, this can be achieved by so-called overlay papers which obtain special properties through special coatings and / or impregnations. For furniture, such overlays are too costly because of the lower quality requirements of the surface.
  • a subsequent coating of urea resin-impregnated paper webs with melamine resin is not possible because the high temperatures for the pre-crosslinking of the melamine resin have a negative effect on the urea resin, which is too crosslinked and therefore no longer tacky.
  • the coating of a paper web is performed in the following order: a first layer of a predetermined amount of melamine resin is applied to a first side of the paper web, the paper web is then temporally and spatially immediately following the application of the first layer (in line) at a web temperature of at least 120 ° C, then a second layer of a predetermined amount of urea resin is applied to a second side of the paper web and finally the paper web is dried at a web temperature of 90 ° to 110 ° C.
  • a paper web coated with urea resin and melamine resin can be produced, the proportion of urea resin being relatively high and that of melamine resin being correspondingly low.
  • the coated with urea resin second side of the paper web is intended for bonding to a substrate, such as a plate of wood material.
  • the paper web coated in this way can be glued to the substrate properly and firmly in a later step by application of heat and pressure (compression); because of the low web temperature during the second drying, the urea resin crosslinks only slightly.
  • the paper web decreases the pressing a surface that meets all quality criteria such as hardness, scratch resistance and abrasion resistance, because here the better properties of the melamine resin come into play.
  • the finished pressed substrate with the paper web produced by the process according to the invention is also optically flawless, in particular free of air inclusions. Therefore, according to the inventive process, a majority of the resin may be urea resin; There is thus achieved a significant cost savings.
  • the paper web is formed from a decorative paper.
  • a desired appearance of the finished substrate can be achieved.
  • the method has proven to be particularly suitable for decor papers.
  • the first layer of melamine resin is coated with hard, abrasion-resistant particles of e.g. Mixed with corundum. This increases the wear resistance of the first layer.
  • a web speed during coating and drying is at least 15 m / min. This ensures that the melamine resin barely penetrates into the paper web between the first coating and the first drying and is as far as possible available as a wear layer.
  • the application of the first layer takes place in the gusset.
  • an application unit has a limiting element which forms a gusset with a deflection roller.
  • the gusset is the melamine resin, if necessary contains the hard particles, given and so applied to the first side of the paper web. This has proved to be particularly favorable for the claimed method.
  • Figure 1 is a side view of an apparatus for performing the method
  • Figure 2 is a section through a coated paper web.
  • an apparatus for carrying out the method comprises an unwinding device 2 for a paper web 1, a first application unit 3, a first dryer 4, a second application unit 5 and a second dryer 6.
  • the second dryer 6 is not shown.
  • the paper web 1 consists of printed or unprinted paper with a weight of 20 to 250 g / m 2 .
  • its first side corresponds to the printed side.
  • the first application unit 3 for applying a first coating composition to the first side of the paper web 1 comprises a deflecting roller 7 for deflecting the paper web 1 and a metering roller 8.
  • the deflecting roller 7 and the metering roller 8 are mounted with parallel axes of rotation in height and offset to the side.
  • the deflection roller 7 is associated with a limiting element 9, which is e.g. is formed of a substantially flat sheet and extends over the length and parallel to the guide roller 7.
  • the limiting element 9 is arranged below the metering roller 8 so that it forms a gusset 10 with the deflecting roller 7. It is arranged at an acute angle to the vertical in the wrapping region of the paper web 1 next to the deflecting roller 7 and is guided in a lower end region so close to the shell that it touches the paper web 1 tangentially - at least approximately - and the gusset 10 seals down. At its sides, the gusset 10 is open.
  • the gusset 10 is associated with a manifold 1 1 for the introduction of the first coating composition, which is connected to a supply line. Below the deflection roller 7, a collecting tray 12 is arranged for overflowing first coating composition. The drip pan 12 is connected to a circulating system for the first coating composition.
  • the metering roller 8 forms with the guide roller 7 a narrow, adjustable metering.
  • the first dryer 4 is arranged, which is designed as a circulating air levitation dryer.
  • One Distance between the first application unit 3 and the first dryer 4 is kept as low as possible and is less than 2 m. In this way, in conjunction with a high web speed, a first drying takes place temporally and spatially immediately after application of a first layer 20, in order largely to avoid impregnation of the paper web 1.
  • the second application unit 5 for applying a second coating composition to a second side of the paper web 1 is arranged behind the first dryer 4 and comprises an anilox roller 13 and two pressure rollers 14 which ensure a certain wrap angle of the paper web 1 on the anilox roller 13.
  • Urea resin as the second coating composition is applicable by conventional means to the anilox roller 13 and e.g. metered by a doctor.
  • the second dryer 6 is arranged behind the second application unit 5 and essentially corresponds to the first dryer 4.
  • a so-called breathing path is arranged, in which the paper web 1 is deflected several times to extend the path in order to achieve the greatest possible impregnation of the paper web 1.
  • the paper web 1 is withdrawn from a supply roll, which is mounted in the unwinding device 2, and guided to the first application unit 3.
  • the paper web 1 is guided around the deflection roller 7 and through the metering gap.
  • the speed of the paper web 1 is at least 15 m / min.
  • the first coating composition is pumped in excess from a reservoir through the distributor tube 1 1.
  • a portion of the first coating composition consisting essentially of melamine resin in aqueous solution and possibly hard particles is entrained from the first side of the paper web 1 as the first layer 20 and dosed in the metering nip to a predetermined basis weight.
  • Excess first coating material flows over the open sides of the gusset 10 into the sump 12. From here, the excess first coating composition is conveyed back into the reservoir.
  • the paper web 1 with the wet first layer 20 then enters the first dryer 4 and is here at relatively high temperatures at which the web temperature reaches about 1 10 ° to 140 ° C, dried to a predetermined residual moisture. Since only little time elapses between the application of the first layer 20 and the first drying, the first coating composition only completely permeates the paper web 1. This is intended in order to obtain the first layer 20 as extensively as a wear layer.
  • the second coating composition of urea resin in aqueous solution in the second application unit 5 is applied to a second side of the paper web 1 in a predetermined amount as a second layer 21.
  • the paper web 1 with the layers 20, 21 then passes through a residence section in which the second coating material penetrates the paper web 1 in such a way that it is partially penetrated by the first and, moreover, by the second coating composition.
  • the coated paper web 1 is dried in the second dryer 6 to a predetermined final moisture so that a web temperature is 90 ° to a maximum of 1 10 ⁇ ⁇ .
  • the finished coated paper web 1 is either cut into sheets which are stacked or wound into a roll.
  • a layer structure of the finished coated and dried paper web 1 is shown in FIG. On the first, here upper printed side of the paper web 1, the first layer 20 is formed. This penetrates the paper web 1 only partially, as indicated by the dotted line 22.
  • the second layer 21 is applied to the second side of the paper web 1, which is opposite to the first, and adjoins the first layer 20 within the paper.
  • the invention is described with reference to an embodiment in which the first layer 20 in the gusset 10 and the second layer 21 is applied with an anilox roller 13.
  • an anilox roller 13 instead of these types of applications, other known devices for coating can be used.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé de couchage d'une bande de papier continue (1), comprenant les étapes suivantes, dans l'ordre indiqué : dépôt d'une première couche (20) d'une quantité prédéfinie de résine de mélamine sur une première face de la bande de papier (1); premier séchage de la bande (1) ainsi revêtue à une température de bande au moins égale à 120°C; dépôt d'une deuxième couche (21) d'une quantité prédéfinie de résine d'urée sur une deuxième face de la bande (1); deuxième séchage de la bande (1) à une température de bande inférieure à 100°C.
EP13715691.5A 2012-05-02 2013-04-11 Procédé de couchage d'une bande de papier continue Active EP2844797B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13715691T PL2844797T3 (pl) 2012-05-02 2013-04-11 Sposób nakładania powłok na taśmę papierową

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012103824.4A DE102012103824B4 (de) 2012-05-02 2012-05-02 Verfahren zum Beschichten einer Papierbahn
PCT/EP2013/057607 WO2013164177A1 (fr) 2012-05-02 2013-04-11 Procédé de couchage d'une bande de papier continue

Publications (2)

Publication Number Publication Date
EP2844797A1 true EP2844797A1 (fr) 2015-03-11
EP2844797B1 EP2844797B1 (fr) 2016-01-20

Family

ID=48087590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13715691.5A Active EP2844797B1 (fr) 2012-05-02 2013-04-11 Procédé de couchage d'une bande de papier continue

Country Status (6)

Country Link
US (1) US9644321B2 (fr)
EP (1) EP2844797B1 (fr)
CN (1) CN104254648A (fr)
DE (1) DE102012103824B4 (fr)
PL (1) PL2844797T3 (fr)
WO (1) WO2013164177A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT14447U1 (de) * 2014-10-20 2015-11-15 Valmet Technologies Inc Anordnung zum nachträglichen Ausrüsten einer Faserbahnmaschine mit einer Auftragspartie für ein Behandlungsmedium
DE102021123733A1 (de) 2021-09-14 2023-03-16 Vits Technology Gmbh Verfahren zum Beschichten einer bedruckten Warenbahn

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2230095A1 (de) 1971-09-15 1974-01-03 Gerhard Dipl Ing Tuch Autoschwebebahn mit schwimmgruendung
DE2917170A1 (de) * 1978-05-03 1979-11-15 Oesterr Hiag Werke Ag Verfahren zur herstellung eines melaminharzbeschichteten papiers
SE460274B (sv) * 1988-02-18 1989-09-25 Perstorp Ab Foerfarande foer framstaellning av ett noetningsbestaendigt, dekorativt haerdplastlaminat
DE19710549C2 (de) 1997-03-14 1999-01-28 Vits Maschinenbau Gmbh Verfahren und Anlage zum Imprägnieren und Trocknen einer durchlaufenden Bahn
US6325884B1 (en) * 1999-01-14 2001-12-04 Panolam Industries Abrasion resistant laminate and process for producing same
DE19901525C2 (de) * 1999-01-16 2001-02-08 Vits Maschinenbau Gmbh Anlage zum Imprägnieren und Beschichten von Papier
CA2295416C (fr) * 1999-03-12 2005-10-04 Premark Rwp Holdings, Inc. Systeme et methode de traitement des deux cotes d'un panneau
DE10355180B4 (de) * 2003-11-26 2010-04-08 Thomas C. Linnemann Verfahren zum Herstellen eines Dekorlaminats
CN100418714C (zh) 2004-07-28 2008-09-17 株式会社新光Boardtech 装饰板的制造方法
EP2147153B1 (fr) 2007-05-07 2013-08-14 Depco-Trh Pty Ltd Améliorations dans la fabrication de papiers ou non-tissés imprégnés de résine à l'état b
US20090087643A1 (en) * 2007-10-02 2009-04-02 Gottzmann Andreas M Laminate Surface Layer Without an Overlay and Method of Manufacture
DE102008008292A1 (de) * 2008-02-07 2009-08-13 hülsta-werke Hüls GmbH & Co KG Papierschicht zum Herstellen eines flächigen, bedruckten oder bedruckbaren Bauteils
CN201310053Y (zh) 2008-11-11 2009-09-16 乐山吉象地板制品有限公司 耐磨装饰纸
DE102009013471A1 (de) * 2009-03-19 2010-09-23 Dekor-Kunststoffe Gmbh Dekorpapier

Also Published As

Publication number Publication date
DE102012103824B4 (de) 2015-12-03
EP2844797B1 (fr) 2016-01-20
US20150086712A1 (en) 2015-03-26
US9644321B2 (en) 2017-05-09
DE102012103824A1 (de) 2013-11-07
PL2844797T3 (pl) 2016-08-31
CN104254648A (zh) 2014-12-31
WO2013164177A1 (fr) 2013-11-07

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