EP1831465A1 - Systeme pour appliquer une masse de revetement sur une bande de papier - Google Patents

Systeme pour appliquer une masse de revetement sur une bande de papier

Info

Publication number
EP1831465A1
EP1831465A1 EP05849247A EP05849247A EP1831465A1 EP 1831465 A1 EP1831465 A1 EP 1831465A1 EP 05849247 A EP05849247 A EP 05849247A EP 05849247 A EP05849247 A EP 05849247A EP 1831465 A1 EP1831465 A1 EP 1831465A1
Authority
EP
European Patent Office
Prior art keywords
paper web
roller
limiting element
web
gap
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
EP05849247A
Other languages
German (de)
English (en)
Other versions
EP1831465B1 (fr
Inventor
Walter Müller
Heinrich Kuschnik
Udo Unger
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 Systems 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 Systems GmbH filed Critical Vits Systems GmbH
Publication of EP1831465A1 publication Critical patent/EP1831465A1/fr
Application granted granted Critical
Publication of EP1831465B1 publication Critical patent/EP1831465B1/fr
Not-in-force 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
    • 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
    • D21H23/40—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 only one side of the paper being in contact with the material
    • 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
    • D21H27/18—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
    • D21H27/28—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 treated to obtain specific resistance properties, e.g. against wear or weather
    • 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
    • D21H27/30—Multi-ply

Definitions

  • the invention relates to a device for applying a consisting of liquid resin and fine-grained abrasive material coating composition on a continuous pre-impregnated paper web according to the preamble of claim 1.
  • abrasive material is z. B. corundum used.
  • the problem with the use of such a coating composition is the tendency of the corundum particles to settle, d. H. the tendency of the coating mass to segregate.
  • DE 195 08 797 C describes a process for the production of decorative paper for abrasion-resistant laminates.
  • a viscous mixture of melamine resin, corundum particles and alpha-cellulose is applied as a coating mass on the visible surface of a decorative paper.
  • the alpha-cellulose serves as a stiffening and suspending agent.
  • the corundum particles have a particle size of 15 to 50 microns.
  • the application rate is 80 to 200 g / m 2 , so that after drying results in a layer thickness of 20 to 65 microns.
  • the coating composition is applied by means of a wire bar, an anilox roll or a reverse coating system. It has been found that the components of such application systems which come into contact with the coating composition are worn by the abrasive corundum particles within a very short time.
  • DE 196 43 742 A To avoid excessive wear is known from DE 196 43 742 A, to use a slotted nozzle for applying a coating composition with fine-grained abrasive material.
  • the coating composition is applied as a thin veil in excess to the paper web.
  • segregation by sedimentation of the fine-grained material is excluded.
  • a generic device for applying a coating composition to a resin-impregnated, possibly also already dried, paper web in which an application unit likewise has a slot nozzle is known from EP 1 084 298 B.
  • This device is provided with a guide roller on which the paper web in a wrap region, and a metering roller, which is arranged parallel to the guide roller and includes a narrow gap with it.
  • the slot nozzle is arranged on the deflection roller or on the metering roller.
  • a method for impregnating decorative papers wherein on impregnated wet decorative paper, a layer of a treatment mass of amino resin with particulate
  • Abriebmaterial is used, is known from EP 1 068 394 B. Also in this document it is pointed out that by the nozzle principle, in which the treatment mass with z. B. corundum particles is circulated and moved uniformly, settling phenomena are not observed. It can be dispensed with the admixture of viscosity-increasing substances.
  • alumina and / or silicon carbide having a grain size of 60 to 160 ⁇ m can be used.
  • the coating composition is sprayed onto the paper web with a large excess, and with a 10 to 50-fold greater amount than required for the desired layer thickness. From the dosed coating mass, a large part flows directly back into a drip pan. Accordingly large, the circulation system must be designed and correspondingly high investment and energy costs.
  • the object of the invention is to develop a device for applying a coating composition to a continuous paper web according to the preamble of claim 1, in which segregation of the coating composition is avoided and complete wetting of the paper web is ensured and in which work is carried out with a slight excess of coating material can.
  • the device should be less susceptible to wear.
  • the application unit of the device has a delimiting element arranged in front of the nip in the web running direction, by means of which a gusset for receiving the coating mass is formed between the deflecting roller and the delimiting element.
  • the coating composition is filled. From the running through the gusset paper web, the coating composition is received, dragged to the gap between the metering roller and the guide roller and adjusted at the exit of the gap to the desired amount, wherein a portion of the coating material is returned from the metering to the gap and the remaining part as Layer remains on the paper web.
  • gusset only a slightly higher than the required amount of the coating composition can be dosed.
  • containers, lines and the circulation pump can be made smaller.
  • the investment and energy requirements are reduced.
  • the gusset forming limiting element is a very simple component and can optionally be easily replaced.
  • the coating mass is inevitably mixed by the movement of the paper web.
  • a possibly occurring, slight settling of the corundum particles in the gusset leads rather to an accumulation of the coating mass of corundum particles taken up by the paper web than to an impoverishment.
  • the reason for this is that corundum particles possibly settling in the gusset move onto the paper web.
  • a particular advantage of a device according to the invention is that it is versatile because of its simplicity. It is for impregnating decorative paper and also for
  • Impregnation of overlay paper suitable.
  • the paper web to be coated can by
  • a prepreg paper web may be dried prior to application of coating composition.
  • the coating composition can on viscosity-increasing substances such.
  • B. alpha-cellulose can be dispensed with.
  • abrasive material all known particles can be used, for.
  • Silicon carbide with grain size of 15 to 200 microns.
  • the thickness of the coating can be 20 to 250 ⁇ m.
  • the limiting element may according to claim 3 alternatively at its lower end to the paper web a narrow gap of z. B. 0.05 to 1 mm. Depending on the web speed, the coating material is taken out of the gap by the paper web up to a certain gap width, so that it does not flow through the gap. A complete take is z. B.
  • the limiting element is designed as a largely planar, at an acute angle to the vertical component, and thus as a simple component, and arranged in front of the guide roller.
  • the metering roller can be arranged offset in height relative to the guide roller according to claim 5. This allows easy attachment of the limiting element.
  • the metering roller and the guide roller according to claim 6 form drivable opposite, allows for both rollers a movement in the web running direction and thus a dosing of the coating material with low risk of wear of the rollers.
  • the metering roller and the guide roller may be designed to be drivable in the same direction. This makes it possible to smooth the surface of the recorded layer by the metering roller rolling counter to the direction of web travel.
  • the metering roller according to claim 8 downstream of a smoothing unit allows smoothing of the surface of the recorded layer and is particularly in a metering roll, which rolls according to claim 6 in the direction of paper travel and from which tears off the remaining on the paper web, advantage.
  • FIGURE shows a device according to the invention for applying coating material to a paper web.
  • a device for applying a coating composition consisting of liquid resin and fine-grained abrasive material to a preimpregnated paper web 1 has a deflecting roller 2, a metering roller 3 and an application unit.
  • the paper web 1 is fed according to the figure in the horizontal direction of the guide roller 2 and is applied to this in a wrap, and that in the range of an arc of 180 °. Then it is in the horizontal direction, as symbolized by an arrow A, led to a dryer, not shown.
  • the guide roller 2 is rotatably mounted with a horizontal axis in a machine frame, not shown.
  • the metering roller 3 is rotatably mounted in the machine frame, that the axes of rotation of the guide roller 2 and the metering roller 3 are parallel and between them a narrow gap 4 is formed.
  • the width of this gap 4 is z. B. 0.05 to 0.5 mm.
  • the axis of rotation of the metering roller 3 is higher than that of the deflection roller 2, d. H.
  • the metering roller 3 is arranged at a height offset from the guide roller 2.
  • the bearing of one of the rollers 2, 3 is displaceable parallel to a connecting line of its axes of rotation, so that a width of the narrow gap 4 between the rollers 2, 3 is variable.
  • the metering roller 3 is provided with a smooth roll shell.
  • the guide roller 2 and the metering roller 3 are each connected to a drive so that their directions of rotation arrows B and C are in the same direction with the web running direction of the paper web 1. Ie. the two rollers 2, 3 themselves are driven in opposite directions.
  • the drives of the two rollers 2, 3 are mechanically or electrically coupled so that the rollers 2, 3 rotate synchronously or approximately synchronously.
  • the application unit has a limiting element 5, which is arranged below the metering roller 3 so that between the guide roller 2 and the limiting element 5, a gusset 6 is formed.
  • the limiting element 5 is formed as a substantially planar component and extends parallel to the guide roller 2.
  • the limiting element 5 is a metal z. B. made of stainless steel, flat sheet metal, which is arranged at an acute angle to the vertical in the wrapping area in front of the guide roller 2. The lower end of the limiting element 5 is guided so close to the jacket of the guide roller 2 that it touches the paper web 1 and thus seals the gusset 6 down.
  • the limiting element 5 extends by a length of at least a few millimeters beyond the line of contact with the paper web 1 downwards, d. H. it is tangent to the paper web 1 on.
  • the gusset 6 is open.
  • the application unit further has a supply line 7 for the coating composition and a manifold 8, in which the supply line 7 opens.
  • the also parallel to the guide roller 2 extending manifold 8 is located in the upper region of the gusset 6 and is provided on its underside with spaced holes.
  • the application unit additionally comprises a collecting trough 9 arranged underneath the deflecting roller 2, as well as means, not shown, of a circulating system for the coating compound with a storage container, a pump and lines to which the collecting trough 9 and the supply line 7 are connected. Possibly. a bypass arrangement to the gusset 6 is provided.
  • a smoothing unit with a parallel to the guide roller 2 extending retaining strip 10 and a rectangular lobes 11 of flexible, rubbery material is arranged.
  • the tab 11 is fixed to the rear edge of the retaining strip 10 so that a strip-shaped part of the tab 11 loosely rests on the top of the running of the guide roller 1 paper web 1.
  • the tab 11 extends over the entire width of the paper web 1.
  • the paper web 1 is at a web speed between about 10 to 70 m / min, z. B. of 50 m / min, the guide roller 2 supplied in a horizontal direction from below, led to the guide roller 2 and further approximately horizontally in the direction of arrow A of the dryer.
  • the coating composition is metered through the supply line 7 and the manifold 8, which contains homogeneously distributed the abrasion-resistant particles.
  • the coating composition is largely uniformly distributed over the width of the paper web 1.
  • the amount supplied corresponds at least and as exactly as possible to the predetermined desired quantity corresponding to a selected coating thickness. If necessary, small amounts of excess coating material flow over the open sides of the gusset 6, are collected in the sump 9 and returned to the reservoir.
  • the paper web 1 takes from the gusset 6, the coating composition.
  • the inclusion of the coating composition is carried out with a 1 to 3-fold excess, ie, with a much lower excess than in a spraying of the paper web 1.
  • the width of which is set according to the desired layer thickness, which is on the paper web 1 dosing remaining coating mass dosed.
  • Excess coating composition, and indeed retained in front of the gap 4 and carried by the metering roller 3 coating mass accumulates in front of the gap 4 and flows back into the gusset 6.
  • a small portion of the coating mass entrained by the metering roller 3 can drip into the trough 9 and be circulated with the remaining coating compound.
  • a portion of the coating composition may be circulated through the bypass arrangement such that the total amount circulated may be three to ten times greater than the amount required. Also, this circulated amount is much lower than the amount that is necessary when using slot nozzles.
  • the tearing off of the coating 1 adhering to the paper web 1 from the surface of the metering roller 3 at the exit of the gap 4 can lead to slight unevenness of the layer, for. B. to longitudinal stripes lead. These are smoothed by the following, resting on the surface of the layer of flaps 11.
  • the thus coated paper web 1 is then dried in the dryer to a predetermined residual moisture and then z. B. wound on a roll or cut into sheets.
  • the supply line 7 and the manifold 8 can be replaced by a plurality of supply lines, which open at a distance from each other in the upper region of the gusset 6.
  • the limiting element 5 is arranged so that it forms a narrow gap of 0.05 to 1 mm with the paper web 1.
  • the gusset 6 may be closed by lateral sheets on the sides. In operation, a small amount of coating material continuously flows through this gap of the gusset 6 and drips into the sump 9.
  • the drives of the deflection roller 2 and the metering roller 3 are connected so that the direction of rotation of the metering roller 3 is in opposite directions to that of the guide roller 2 and to the web running direction. Since, in this embodiment, the metering roller 3 smoothes the surface of the layer, the smoothing unit can optionally be dispensed with.
  • the limiting element 5 and possibly elements on the sides of plastic z. B. be made of Teflon.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un système pour appliquer une masse de revêtement constituée d'une résine liquide et d'une matière abrasive à grains fins sur une bande de papier continue préimprégnée destinée à être utilisée pour produire des stratifiés résistant à l'usure. Ce système comprend un cylindre déflecteur sur lequel la bande de papier s'appuie au niveau d'une zone d'enroulement, un cylindre doseur disposé parallèlement au cylindre déflecteur, un interstice étroit étant formé entre ces deux cylindres, ainsi qu'une unité d'application. Les unités d'application connues présentent des buses à fentes à travers lesquelles la masse de traitement est injectée sur la bande de papier. Le problème de ces unités est qu'elles permettent difficilement d'obtenir une imprégnation totale de la bande de papier, un surplus important de masse de traitement étant par ailleurs injecté sur la bande de papier. L'objectif de l'invention est d'éliminer ces inconvénients. A cet effet, l'unité d'application selon l'invention comprend un élément de limitation qui est disposé en amont de l'interstice dans le sens d'avance de la bande et qui permet d'obtenir entre le cylindre déflecteur et l'élément de limitation un coin destiné à recevoir la masse de revêtement. Le système selon l'invention peut être utilisé pour imprégner du papier pour produire un stratifié résistant à l'usure.
EP05849247.1A 2004-12-22 2005-12-16 Systeme pour appliquer une masse de revetement sur une bande de papier Not-in-force EP1831465B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004063043A DE102004063043B3 (de) 2004-12-22 2004-12-22 Vorrichtung zum Auftragen einer Beschichtungsmasse auf eine Papierbahn
PCT/EP2005/013576 WO2006069646A1 (fr) 2004-12-22 2005-12-16 Systeme pour appliquer une masse de revetement sur une bande de papier

Publications (2)

Publication Number Publication Date
EP1831465A1 true EP1831465A1 (fr) 2007-09-12
EP1831465B1 EP1831465B1 (fr) 2016-03-09

Family

ID=36123115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05849247.1A Not-in-force EP1831465B1 (fr) 2004-12-22 2005-12-16 Systeme pour appliquer une masse de revetement sur une bande de papier

Country Status (5)

Country Link
US (1) US20080105197A1 (fr)
EP (1) EP1831465B1 (fr)
CN (1) CN101065539A (fr)
DE (1) DE102004063043B3 (fr)
WO (1) WO2006069646A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL1960602T3 (pl) * 2006-12-14 2012-03-30 Grenzebach Bsh Gmbh Mechanizm powlekający do nakładania silnie abrazyjnej masy powłokowej na przemieszczającą się taśmę nośną
DE102008029861A1 (de) * 2008-06-25 2009-12-31 Vits Systems Gmbh Vorrichtung und Verfahren zum Bedrucken und Imprägnieren/Beschichten einer Bahn
DE102009034605B3 (de) * 2009-07-24 2011-01-27 Vits Technology Gmbh Vorrichtung zum Beschichten einer durchlaufenden Bahn
CN103894317A (zh) * 2014-03-28 2014-07-02 苏州市建诚装饰材料有限公司 一种喷涂装置
CN106835844B (zh) * 2017-03-22 2018-08-21 山东东宇鸿翔装饰材料有限公司 装饰纸用浸胶试验机

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DE1694594C3 (de) * 1960-01-11 1975-05-28 Minnesota Mining And Manufacturing Co., Saint Paul, Minn. (V.St.A.) Reinigungs- und Polierkörper
US3179536A (en) * 1961-05-19 1965-04-20 Kimberly Clark Co Method and apparatus for coating paper
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AT325005B (de) * 1967-11-20 1975-09-25 Benno Saladin Verfahren und vorrichtung zum beschichten als endlose bahnen oder in formatzuschnitten auftretender unterlagen mit pulverförmigenwerkstoffen
SE427805B (sv) * 1978-12-20 1983-05-09 Inventing Ab Sett och anleggning for valfri behandling, sasom ensidig eller tvasidig bestrykning, impregnering eller ytlimning av en lopande bana.
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DE19643742A1 (de) * 1996-10-23 1998-04-30 Vits Maschinenbau Gmbh Verfahren und Vorrichtung zum Beschichten einer Papierbahn
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Also Published As

Publication number Publication date
DE102004063043B3 (de) 2006-07-20
CN101065539A (zh) 2007-10-31
WO2006069646A1 (fr) 2006-07-06
EP1831465B1 (fr) 2016-03-09
US20080105197A1 (en) 2008-05-08

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