EP0122264A1 - Method for coating back-cloth with a powdery synthetic product. - Google Patents

Method for coating back-cloth with a powdery synthetic product.

Info

Publication number
EP0122264A1
EP0122264A1 EP83903082A EP83903082A EP0122264A1 EP 0122264 A1 EP0122264 A1 EP 0122264A1 EP 83903082 A EP83903082 A EP 83903082A EP 83903082 A EP83903082 A EP 83903082A EP 0122264 A1 EP0122264 A1 EP 0122264A1
Authority
EP
European Patent Office
Prior art keywords
powder
intermediate carrier
heat
textile
contact
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
EP83903082A
Other languages
German (de)
French (fr)
Other versions
EP0122264B1 (en
EP0122264B2 (en
Inventor
Josef Schaetti
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.)
Schaetti and Co
Original Assignee
Schaetti and Co
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
Family has litigation
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Application filed by Schaetti and Co filed Critical Schaetti and Co
Priority to AT83903082T priority Critical patent/ATE19964T1/en
Publication of EP0122264A1 publication Critical patent/EP0122264A1/en
Publication of EP0122264B1 publication Critical patent/EP0122264B1/en
Application granted granted Critical
Publication of EP0122264B2 publication Critical patent/EP0122264B2/en
Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
    • D06N3/0093—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin by applying resin powders; by sintering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
    • B05D2401/30—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant
    • B05D2401/32—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant applied as powders

Definitions

  • the coating can be carried out with powder or pastes.
  • the application and distribution of the plastic can be direct, i.e. for example by sprinkling a powder on the textile base or indirectly by means of an intermediate carrier, in the form of an engraved roller or a perforated cylinder.
  • Spreading methods have the disadvantage that the powder precipitates unevenly due to the occurrence of electrostatic forces.
  • a method in which the powder is applied to the textile web by means of an intermediate carrier in the form of an engraved roller has the advantage of a uniform coating with the elimination of the disruptive forces of electrostatic charges.
  • the application of the material located in the recesses of the engraved roller to the fabric must be done using Heat.
  • the fabric web must be brought into contact with the engraved roller.
  • the dual task of firstly bringing the powder through contact with the engraved conveying surface onto the web of material and secondly supplying the plastic powder with the necessary heat so that it develops the necessary adhesive force to adhere to the web of material has so far not been able to be solved separately.
  • the fabric web had to be heated up to such an extent by upstream heat sources that when the hot fabric web touches the powder in the recesses of the engraved and cooled roller, the powder immediately adheres to the fabric web.
  • Another method provides for the powder to be melted through the textile base lying against the engraved roller and thus to be adhesively bonded to the base.
  • the temperature control is dependent on how thick the textile web to be coated is, what color it has, what thermal conductivity or radiation permeability it has, what heat capacity it has, and what chemical nature it consists of
  • the present invention relates to a method for coating a textile base made of woven or non-woven material made of natural or synthetic fibers, in which the powder over an intermediate carrier provided with recesses, in which the powder sticks to the intermediate carrier during application and Distribution of the same avoiding temperature.
  • the heat is supplied directly to the powder lying in the recesses of the intermediate carrier without hindrance through the textile base.
  • the omission of the textile underlay in the area of heat supply to the powder greatly simplifies the entire temperature control, since only constant machine factors and the only varying plastic powders have to be taken into account in the temperature control.
  • the intermediate carrier can be kept at a temperature required by the powder to be used. This can be done by supplying or removing heat using appropriate heating or cooling agents. This depends on the type of heat supply to the powder located in the recesses of the intermediate carrier.
  • the textile web can be placed on the intermediate carrier via a press roller without other mechanical means being disregarded.
  • the heat supply to the powder should advantageously be from outside the intermediate carrier.
  • the powder which is to be used for the method and is suitable for the method is located in a powder storage container 1.
  • the powder in the storage container 1 is removed from the powder storage container 1 by means of a metering device in accordance with the amount of the recesses provided in an intermediate carrier 5 taken.
  • a possible embodiment of such a metering device can be a metering roller 2. Vibrating screens or rotating brushes can also be used. without excluding other metering devices, as are known in the art.
  • a powder curtain falls from the powder metering device into a powder distribution and application space 3, which is delimited at least on one side by a cooled doctor blade 4, but preferably on two sides by cooled doctor blades 4.
  • the two doctor blades 4 shown here as a doctor blade 4 are in contact with the surface of the intermediate carrier 5.
  • the cooled squeegee 4 which follows with respect to the direction of movement of the intermediate carrier 5 ensures a completely fill the wells in the intermediate carrier with powder and scrape off the excess.
  • the intermediate carrier 5, which acts as the conveying surface of the powder, can be a so-called jin of the powder coating Technically known engraved roller without this excludes differently shaped intermediate supports 5 as conveying surfaces.
  • the intermediate carrier can be equipped with coolant and / or heating medium in order to bring about a constant temperature of the surface.
  • one or more heat sources 7, 8, 9 can act directly on the powder lying in the depressions in a manner coordinated with the powder.
  • the substrate to be coated is not in the way here.
  • the regulation of the heat supply therefore only needs to be matched to the powder to be used.
  • the underlay itself is not exposed to these undesirable heat influences.
  • the heat is supplied without contact, ie by means of heat radiation or by means of heat conduction or heat transfer. Combinations too * Different heat sources can be realized. Depending on the heat sources, heating surfaces or rollers, radiant heaters or hot air come into question.
  • the plastic powder lying in the recesses of the intermediate carrier is softened and melted on the layer closest to the heat sources in such a way that great adhesive forces develop here.
  • the substrate to be coated is then brought into contact with the powder, which is now extremely sticky, at this heat supply zone.
  • the underlay 11 to be coated can be guided around or along a pressure roller 10 which presses on the intermediate support 5 with the interposition of the underlay.
  • the extremely sticky powder now immediately adheres to the base to be coated and is drawn from the base 11 of the intermediate carrier 5 by the base 11 running around the press roller 10.
  • the temperature control can be regulated by coolant in the press roll 10, with the result that a temperature gradient between the surface of the intermediate carrier and the
  • OMPI coating surface can be achieved.
  • the surface of the intermediate carrier provided with powder is at least as wide as the base to be coated.
  • the powder-coated surface of the intermediate carrier must also be brought into line with the surface of the substrate to be coated. This can be done either by removing powder in front of the heat supply zone, by adding the powder which cannot be brought into register laterally with the substrate to be coated
  • the intermediate carrier can, if necessary, also be provided with a Teflon layer.

Abstract

Lors de procédés connus d'enduction de supports textiles avec un produit synthétique en poudre, on soumet le support textile à des traitements thermiques; soit le pan d'étoffe sert au transport de la chaleur, soit il est traversé par un rayonnement thermique. Le présent procédé permet d'éviter cela. Grâce à une installation de dosage (2), le produit synthétique en poudre passe d'un réservoir de stockage de poudre (1) au compartiment de distribution et d'apport de poudre (3) où il est distribué sur une surface de transport (5) grâce à un racloir (4). Des sources de chaleur (7-9) agissent sans contact, directement sur le produit synthétique en poudre situé sur le porteur intermédiaire. Le support à enduire (11) est pressé grâce à un cylindre de pression (10) contre le porteur intermédiaire (5) où la poudre en grande partie adhésive adhère tout de suite au support textile (11).During known processes for coating textile supports with a synthetic product in powder form, the textile support is subjected to heat treatments; either the piece of fabric serves to transport heat, or it is traversed by thermal radiation. The present method avoids this. Thanks to a dosing installation (2), the powdered synthetic product passes from a powder storage tank (1) to the powder distribution and supply compartment (3) where it is distributed on a transport surface ( 5) using a scraper (4). Heat sources (7-9) act without contact, directly on the powdered synthetic product located on the intermediate carrier. The support to be coated (11) is pressed by means of a pressure cylinder (10) against the intermediate carrier (5) where the largely adhesive powder adheres immediately to the textile support (11).

Description

Verfahren zum Beschichten textiler Unterlägen mit Kunststoffpulver Process for coating textile underlays with plastic powder
Stoffbahnen mit einer Kunststoffbeschichtung sind bekannt. Die Beεchichtung kann prinzipiell mit Pulver oder Pasten erfolgen. Das Aufbringen und Verteilen des Kunststoffes kann direkt, d.h. beispielsweise durch Aufstreuen eines Pulvers auf die textile Unterlage erfolgen oder indirekt mittels einem Zwischenträger, in Form einer gravierten Walze oder einem gelochten Zylinder. Aufstreuverfahren haben den Nachteil, dass das Pulver durch das Auftreten elektrostatischer Kräfte ungleichmässig ausfällt. Dem¬ gegenüber weist ein Verfahren, bei dem das Pulver mittels einem Zwischenträger in Form einer gravierten Walze auf die textile Bahn aufgetragen wird, den Vorteil einer gleichmässigen Beschichtun unter Wegfall der störenden Kräfte elektrostatischer Ladungen auf.Fabric panels with a plastic coating are known. In principle, the coating can be carried out with powder or pastes. The application and distribution of the plastic can be direct, i.e. for example by sprinkling a powder on the textile base or indirectly by means of an intermediate carrier, in the form of an engraved roller or a perforated cylinder. Spreading methods have the disadvantage that the powder precipitates unevenly due to the occurrence of electrostatic forces. In contrast, a method in which the powder is applied to the textile web by means of an intermediate carrier in the form of an engraved roller has the advantage of a uniform coating with the elimination of the disruptive forces of electrostatic charges.
Das Aufbringen des in den Vertiefungen der gravierten Walze befindlichen Materials auf die Stoffbahn muss mittels Wärme erfolgen. Zudem muss die Stoffbahn mit der gravierten Walze in Kontakt gebracht werden. Die doppelte Aufgabe, einerseits das Pulver durch Kontakt von der gravierten Förderfläche auf die Stoffbahn zu bringen und andererseits dem Kunststoffpulver die nötige Wärme zuzuführen, dass dieses die nötige Klebkraft entwickelt, um an der Stoffbahn zu haften, gelang bisher nicht getrennt zu lösen.The application of the material located in the recesses of the engraved roller to the fabric must be done using Heat. In addition, the fabric web must be brought into contact with the engraved roller. The dual task of firstly bringing the powder through contact with the engraved conveying surface onto the web of material and secondly supplying the plastic powder with the necessary heat so that it develops the necessary adhesive force to adhere to the web of material has so far not been able to be solved separately.
So usste bei einem Verfahren die Stoffbahn durch vorge¬ schaltete Wärmequellen derart hoch aufgeheizt werden, dass bei der Berührung der heissen Stoffbahn mit dem in den Vertiefungen der gravierten und gekühlten Walze das Pulver an die Stoffbahn augenblicklich anhaftet. Ein anderes Verfahren sieht vor durch die an der gravierten Walze an¬ liegende textile Unterlage hindurch das Pulver anzuschmelzen und so mit der Unterlage in Haftverbindung zu bringen.Thus, in one method, the fabric web had to be heated up to such an extent by upstream heat sources that when the hot fabric web touches the powder in the recesses of the engraved and cooled roller, the powder immediately adheres to the fabric web. Another method provides for the powder to be melted through the textile base lying against the engraved roller and thus to be adhesively bonded to the base.
Obwohl die Temperaturführung eigentlich nur von der Art des zu verwendenden Pulvers abhängt, welches einen höheren oder tieferen Schmelzpunkt aufweisen kann, spielt die Art der zu beschichtenden textilen Bahn bei allen bisher be¬ kannten Beschichtungsverfahren mittels einem Zwischenträger, z.B. einer gravierten Walze, eine komplizierende Rolle. _ "5 _Although the temperature control actually only depends on the type of powder to be used, which may have a higher or lower melting point, the type of textile web to be coated plays a complicated role in all previously known coating methods by means of an intermediate carrier, for example an engraved roller . _ "5 _
So ist die Temperaturführung je nach Verfahren davon ab¬ hängig, wie dick die zu beschichtende Textilbahn ist, welche Farbe sie hat, welche Wärmeleitfähigkeit oder Str-ahlendurchlässigkeit sie aufweist, welche Wärmekapazität sie besitzt, und aus welcher chemischen Beschaffenheit sie bestehtDepending on the process, the temperature control is dependent on how thick the textile web to be coated is, what color it has, what thermal conductivity or radiation permeability it has, what heat capacity it has, and what chemical nature it consists of
' Die vorliegende Erfindung betrifft ein Verfahren zum Be¬ schichten einer textilen Unterlage aus gewobenem oder ungewobenem Material aus natürlichen oder synthetischen Fasern, bei dem das Pulver über einen mit Vertiefungen ver¬ sehenen Zwischenträger, bei einer das Festkleben des Pulvers auf den Zwischenträger beim Aufbringen und Verteilen dessel¬ ben vermeidenden Temperatur.The present invention relates to a method for coating a textile base made of woven or non-woven material made of natural or synthetic fibers, in which the powder over an intermediate carrier provided with recesses, in which the powder sticks to the intermediate carrier during application and Distribution of the same avoiding temperature.
Es ist die Aufgabe der vorliegenden Erfindung, ein Ver¬ fahren der obengenannten Art zu schaffen, bei dem die Temperaturführung unabhängig von der zu beschichtenden Stoffbahn erfolgen kann.It is the object of the present invention to provide a method of the type mentioned above in which the temperature control can take place independently of the material web to be coated.
Diese Aufgabe löst ein Verfahren gemäss Oberbegriff des Patentanspruches, dass sich dadurch auszeichnet, dass das in die Vertiefungen des Zwischenträgers eingebrachte Pulver während der Förderung auf dem Zwischenträger unter Zuführung von Wärme in einen stark klebrigen Zustand ver¬ setzt wird und nach der Wärmezuführung durch Berührung mit der textilen Unter]a***≥ aus den Vertiefungen des Zwischen¬ trägers entnommen wird.This object is achieved by a method according to the preamble of the patent claim, which is characterized in that the powder introduced into the depressions of the intermediate carrier is put into a strongly sticky state during the conveyance on the intermediate carrier with the supply of heat and after the heat has been applied by contact with the textile sub] a *** ≥ is removed from the recesses of the intermediate carrier.
Die Zufuhr der Wärme erfolgt in diesem Fall ohne Behinderung durch die textile Unterlage direkt auf das in den Vertiefungen des Zwischenträgers liegende Pulver. Durch den Wegfall der textilen Unterlage im Bereich der Wärmezuführung auf das P.ulver wird die gesamte Temperaturführung erheblich ver¬ einfacht, sind dann doch lediglich stets gleichbleibende Maschinenfaktoren und die nur noch variierenden Kunststoff¬ pulver.bei der Temperaturführung zu berücksichtigen.In this case, the heat is supplied directly to the powder lying in the recesses of the intermediate carrier without hindrance through the textile base. The omission of the textile underlay in the area of heat supply to the powder greatly simplifies the entire temperature control, since only constant machine factors and the only varying plastic powders have to be taken into account in the temperature control.
Der Zwichenträger lässt sich auf eine nach Massgabe des zu verwendenden Pulvers erforderlichen Temperatur halten. Dies kann durch Wärmezu- oder -abfuhr mittels entsprechenden Heiz- oder Kühlmitteln erfolgen. Dies ist abhängig von der Art der Wärmezuführung zu dem in den Vertiefungen des Zwischenträgers befindlichen Pulvers.The intermediate carrier can be kept at a temperature required by the powder to be used. This can be done by supplying or removing heat using appropriate heating or cooling agents. This depends on the type of heat supply to the powder located in the recesses of the intermediate carrier.
Ueber eine Presswalze lässt sich die textile Bahn an den Zwischenträger anlegen, ohne dass dabei andere mechanische Mittel ausser Betracht fallen.The textile web can be placed on the intermediate carrier via a press roller without other mechanical means being disregarded.
OMPI OMPI
Da es wünschenswert ist, dass die Pulvermengen in den Ver¬ tiefungen des Zwischenträgers bei der Wärmezufuhr eine Klebrigkeit entwickeln, die von der Inn enseite der Ver¬ tiefungen nach aussen hin zunimmt, sollte die Wärmezufuhr zum Pulver vorteilhaft von ausserhalb des Zwischenträgers erfolgen.Since it is desirable that the amounts of powder in the depressions of the intermediate carrier develop a stickiness when the heat is added, which increases from the inside to the outside, the heat supply to the powder should advantageously be from outside the intermediate carrier.
Anhand der beigefügten Zeichnung wird das erfindungsgemasse Verfahren nachfolgend erläutert.The method according to the invention is explained below with reference to the attached drawing.
Das nach Wunsch des Anwenders für das Verfahren zu ver¬ wendende und geeignete Pulver befindet sich in einem Pulvervorratsbehältnis 1. Das im Vorratsbehältnis 1 be¬ findliche Pulver wird mittels einer Dosiervorrichtung nach Massgabe der Aufnahmemenge der in einem Zwischenträger 5 vorgesehenen Vertiefungen dem Pulvervorratsbehältnis 1 ent¬ nommen. Eine mögliche Ausführungsform einer solchen Dosiervorrichtung kann eine Dosierwalze 2 sein. Aber auch Rüttelsiebe oder rotierende Bürsten können in Frage kommen. ohne dass nochmals andere Dosiervorrichtungen, wie sie in der Technik bekannt sind, ausgeschlossen wären.The powder which is to be used for the method and is suitable for the method is located in a powder storage container 1. The powder in the storage container 1 is removed from the powder storage container 1 by means of a metering device in accordance with the amount of the recesses provided in an intermediate carrier 5 taken. A possible embodiment of such a metering device can be a metering roller 2. Vibrating screens or rotating brushes can also be used. without excluding other metering devices, as are known in the art.
Von der Pulverdosiervorrichtung fällt ein Pulvervorhang in einen Pulververteil- und -auftragsraum 3, der mindestens von einer Seite durch ein gekühltes Rakel 4, jedoch vor¬ zugsweise von zwei Seiten von gekühlten Rakeln 4 begrenzt wird. Die beiden hier als Streichrakel 4 dargestellten Rakel 4 sind mit der Oberfläche des Zwischenträgers 5 in Kontakt.A powder curtain falls from the powder metering device into a powder distribution and application space 3, which is delimited at least on one side by a cooled doctor blade 4, but preferably on two sides by cooled doctor blades 4. The two doctor blades 4 shown here as a doctor blade 4 are in contact with the surface of the intermediate carrier 5.
Das bezüglich der Bewegungsrichtung des Zwischenträgers 5, der hier als eine gravierte Walze dargestellt ist, vordere Rakel 4 dient im wesentlichen lediglich der Begrenzung des Pulververteil- und-auftragraumes 3. Das bezüglich der Bewegungsrichtung des Zwischenträgers 5 nachfolgende ge¬ kühlte Rakel 4 sorgt für eine vollständige Füllung der Vertiefungen im Zwischenträger mit Pulver und schabt die überflüssige Menge ab. Bei richtiger Dosierung der Pulver¬ zufuhr befindet sich immer nur eine geringe Pulvermenge im Raum 3, die fortlaufend verarbeitet wird.The front squeegee 4 with respect to the direction of movement of the intermediate carrier 5, which is shown here as an engraved roller, essentially serves only to limit the powder distribution and application space 3. The cooled squeegee 4 which follows with respect to the direction of movement of the intermediate carrier 5 ensures a completely fill the wells in the intermediate carrier with powder and scrape off the excess. When the powder feed is dosed correctly, there is always only a small amount of powder in the room 3, which is continuously processed.
DerJZwischenträger 5, der als Förderfläche des Pulvers wirkt, kann eine sogenanntejin der Pulverbeschichtungs- technik bekannte gravierte Walze sein, ohne dass dies anders gestaltete Zwischenträger 5 als Förderflächen aus- schliesst. Der Zwischenträger kann mit Kühl- und/oder Heizmittel ausgerüstet sein, um eine konstante Temperatur der Oberfläche zu bewirken.The intermediate carrier 5, which acts as the conveying surface of the powder, can be a so-called jin of the powder coating Technically known engraved roller without this excludes differently shaped intermediate supports 5 as conveying surfaces. The intermediate carrier can be equipped with coolant and / or heating medium in order to bring about a constant temperature of the surface.
Der sich bewegende Zwischenträger und damit das in seinen Vertiefungen eingerakelte Pulver kommt nun in eine relativ grosse Wärmebehandlungszone. In dieser Zone können ein oder mehrere Wärmequellen 7,8,9 in auf das Pulver abge¬ stimmter Weise Wärme direkt auf das in den Vertiefungen liegende Pulver einwirken.The moving intermediate carrier and thus the powder scraped into its recesses now come into a relatively large heat treatment zone. In this zone, one or more heat sources 7, 8, 9 can act directly on the powder lying in the depressions in a manner coordinated with the powder.
Im G egensatz zu anderen Verfahren ist hier nicht die zu beschichtende Unterlage im Wege. Die Regulierung der Wärmezufuhr braucht somit nur noch auf das zu verwendende Pulver abgestimmt werden. Die Unterlage selber wird diesen unerwünschten Wärmeeinflüssen nicht ausgesetzt. Je nach den zu verwendenden Wärmequellen 7,8,9 erfolgt die Wärme¬ zufuhr berührungslos, d.h. mittels Wärmestrahlung oder mittels Wärmeleitung oder Warmemitfuhrung. Auch Kombinationen * verschiedener Wärmequellen sind realisierbar. Je nachdem kommen als Wärmequellen Heizflächen oder -walzen, Heiz¬ strahler oder Heissluft in Frage.In contrast to other processes, the substrate to be coated is not in the way here. The regulation of the heat supply therefore only needs to be matched to the powder to be used. The underlay itself is not exposed to these undesirable heat influences. Depending on the heat sources 7, 8, 9 to be used, the heat is supplied without contact, ie by means of heat radiation or by means of heat conduction or heat transfer. Combinations too * Different heat sources can be realized. Depending on the heat sources, heating surfaces or rollers, radiant heaters or hot air come into question.
Unter Einfluss der Wärmezuführung wird das in den Vertiefungen des Zwischenträgers liegende Kunststoffpulver erweicht und an der den Wärmequellen nächstgelegenen Schicht so angeschmolzen, dass sich hier grosse Klebekräfte entwickeln.Under the influence of the heat supply, the plastic powder lying in the recesses of the intermediate carrier is softened and melted on the layer closest to the heat sources in such a way that great adhesive forces develop here.
An dieser Wärmezuführzone anschlieεsend wird die zu be¬ schichtende Unterlage mit dem nunmehr im höchsten Mass klebrigen Pulver in Berührung gebracht.The substrate to be coated is then brought into contact with the powder, which is now extremely sticky, at this heat supply zone.
Hierzu kann die zu beschichtende Unterlage 11 um oder entlang einer Anpresswalze 10 geführt werden, die unter Zwischenschaltung der Unterlage auf den Zwischenträger 5 drückt. Das im höchsten Mass klebrige Pulver haftet nun augenblicklich an der zu beschichtenden Unterlage und wird von der um die Presswalze 10 laufenden Unterlage 11 aus den Vertiefungen des Zwichenträgers 5 gezogen. Auch hier wieder lässt sich die Temperaturführung durch Kühlmittel in der Presswalze 10 regulieren, womit ein Temperaturge¬ fälle zwischen Oberfläche des Zwischenträgers und der zuFor this purpose, the underlay 11 to be coated can be guided around or along a pressure roller 10 which presses on the intermediate support 5 with the interposition of the underlay. The extremely sticky powder now immediately adheres to the base to be coated and is drawn from the base 11 of the intermediate carrier 5 by the base 11 running around the press roller 10. Here, too, the temperature control can be regulated by coolant in the press roll 10, with the result that a temperature gradient between the surface of the intermediate carrier and the
OMPI beschichtenden Unterlage erzielen lässt.OMPI coating surface can be achieved.
Obwohl der wichtigste Anwendungsbereich des Verfahrens in der Beschichtung textiler Unterlagen gesehen wird, kann das Verfahren aber sicherlich auch auf andere Materialien ausgedehnt werden. Gerade die schonende Behandlung der Unterlage, die nicht einer Wärmebehandlung im Auftrags¬ bereich ausgesetzt wird, bringt wesentliche Vorteile für die Beschichtung aller wärmeempfindlichen Materialien, wie Textilien mit hohem Ante.. „ynthetischer Fasern,Although the most important area of application of the process is seen in the coating of textile underlays, the process can certainly also be extended to other materials. It is precisely the gentle treatment of the underlay, which is not exposed to heat treatment in the application area, that offers significant advantages for the coating of all heat-sensitive materials, such as textiles with a high content.
Imitationsleder, Y iesssi-c-.:. ' - v ä Filze, Papier und Fourniere, um nur einige Möglich - :: aufzuzählen.Imitation leather, Y iesssi-c -.:. ' - v felt, paper and Fourniere, to list only a few possible - ::.
Wichtig beim erfindungsgemässen Verfahren ist es, dass sämtliches auf dem Zwischenträger durch die Wärmezufuhr zone transportiertes und erweichtes Material auch wiederum dem Zwischenträger entnommen wird. Dazu ist es erforderlich, dass die mit Pulver versehene Fläche des Zwischenträgers mindestens gleich breit, wie die zu beschichtende Unter¬ lage ist. Zudem muss aber auch die mit Pulver versehene Fläche des Zwischenträgers mit der Fläche der zu be¬ schichtenden Unterlage in Deckung gebracht werden. Dies kann entweder durch Pulverentnahme vor der Wärmezufuhr¬ zone erfolgen, indem man das seitlich mit der zu be¬ schichtenden Unterlage nicht in Deckung bringbare PulverIt is important in the method according to the invention that all the material transported and softened on the intermediate carrier through the heat supply zone is again removed from the intermediate carrier. For this purpose, it is necessary that the surface of the intermediate carrier provided with powder is at least as wide as the base to be coated. In addition, however, the powder-coated surface of the intermediate carrier must also be brought into line with the surface of the substrate to be coated. This can be done either by removing powder in front of the heat supply zone, by adding the powder which cannot be brought into register laterally with the substrate to be coated
*τϊ O PI f-λ yy^ W vvIuPrOυ • absaugt/oder durch entsprechende Steuerung der seitlichen Führung der textilen Bahn 11. * τϊ O PI f-λ yy ^ W vvIuPrOυ • aspirates / or by appropriate control of the lateral guidance of the textile web 11.
Damit ein Anhaften des Pulvers auch unter Einfluss der Wärme¬ zuführung unterbunden wird, kann der Zwischenträger falls erforderlich auch mit einer Teflonschicht versehen sein.In order that the adherence of the powder is also prevented under the influence of the heat supply, the intermediate carrier can, if necessary, also be provided with a Teflon layer.
Selbst wenn mit einer Dosiervorrichtung gearbeitet wird, liegt eine geringe Menge Pulvervorrat direkt auf den Zwischenträger auf. Verweilt das Pulver während einer ge- wi en Zeit unter Wärmeeinfluss könnten sich Klumpen bil¬ den. Dies lässt sich durch eine Pulververteilvorrichtung, die das Kunststoffpulver ständig bewegt, vermieden werden. Even when working with a dosing device, a small amount of powder is directly on the intermediate carrier. If the powder remains under the influence of heat for a certain time, lumps could form. This can be avoided by a powder distribution device that constantly moves the plastic powder.

Claims

vP a t e n t a n s p r ü c h e vP claims
1. Verfahren zum Beschichten einer textilen Unterlage aus gewobenem oder ungewobenem Material aus natürlichen oder synthetischen Fasern, bei dem ein KunstS. über einen mit Vertiefungen versehenen Zwischenträger aufgebracht wird, bei einer das Festkleben des Pulvers auf den Zwischenträger beim Aufbringen und Verteilen desselben vermeidender Temperatur, dadurch gekennzeichnet, dass das in die Vertiefungen des Zwischenträgers einge¬ brachte Pulver während der Förderung auf dem Zwischen¬ träger unter Zuführung von Wärme in einen stark kleb¬ rigen Zustand versetzt wird und nach der Wärmezu¬ führung durch Berührung mit der textilen Unterlage aus den Vertiefungen des Zwischenträgers entnommen wird.1. A method for coating a textile base made of woven or non-woven material made of natural or synthetic fibers, in which an KunstS. is applied via an intermediate carrier provided with depressions, at a temperature which avoids the sticking of the powder to the intermediate carrier when applying and distributing the same, characterized in that the powder introduced into the depressions of the intermediate carrier is fed onto the intermediate carrier during conveyance is brought into a strongly sticky state by heat and is removed from the depressions of the intermediate carrier after the supply of heat by contact with the textile base.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Zwischenträger auf einer nach Massgabe des2. The method according to claim 1, characterized in that the intermediate carrier on a according to the
zu verwendenden Pulvers und der gewählten Fördergeschwin¬ digkeit erforderlichen Temperatur gehalten wird.the powder to be used and the temperature required for the selected conveying speed.
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die zu beschichtende textile Unterlage über eine Presswalze an den Zwischenträger angelegt wird. 9. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Auftragsbreite und Auftragsstelle des Pulvers auf dem Zwischenträger vor der Wärmezuführung, entlang den seitlichen Rändern durch Pulverentnahme vom Zwischenträger nach Massgabe der Breite und Be¬ rührungsstelle der textilen Bahn mit dem Zwischenträger erfolgt.3. The method according to claim 1, characterized in that the textile base to be coated is applied to the intermediate carrier via a press roller. 9. The method according to claim 1, characterized in that the application width and application point of the powder on the intermediate carrier before the supply of heat, along the side edges by powder removal from the intermediate carrier according to the width and contact point of the textile web with the intermediate carrier.
10. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die seitliche Führung der textilen Unterlage zum Berührungsbereich mit dem auf dem Zwischenträger befindlichen Pulver nach Massgabe der Auftragsstelle auf dem Zwischenträger gesteuert wird.10. The method according to claim 1, characterized in that the lateral guidance of the textile base to the contact area with the powder located on the intermediate carrier is controlled according to the order point on the intermediate carrier.
11. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Verteilung des Kunststoffpulvers auf dem Zwischenträger mittels einer Pulververteilvorrichtung erfolgt.11. The method according to claim 1, characterized in that the distribution of the plastic powder on the intermediate carrier takes place by means of a powder distribution device.
12. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass ein Anhaften des Pulvers auf den Zwischenträger mittels einer auf denselben angebrachten Teflonschicht unterbunden wird. 12. The method according to claim 1, characterized in that adhesion of the powder to the intermediate carrier is prevented by means of a Teflon layer applied thereon.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass die Presswalze auf einer Temperatur unterhalb derjenigen der Förderfläche gehalten wird .4. The method according to claim 3, characterized in that the press roller is kept at a temperature below that of the conveying surface.
5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Wärmezufuhr zum Pulver von ausserhalb des Zwischenträgers erfolgt.5. The method according to claim 1, characterized in that the heat supply to the powder takes place from outside the intermediate carrier.
6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Wärmezufuhr auf das Pulver berührungsfrei erfolgt.6. The method according to claim 1, characterized in that the heat is applied to the powder without contact.
7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Pulver aus einem Pulvervorratsbehältnis mittels mindestens einem gekühlten Rakel in die Vertiefungen des Zwischenträgers geräkelt wird .7. The method according to claim 1, characterized in that the powder from a powder storage container by means of at least one cooled doctor blade is worked into the recesses of the intermediate carrier.
8. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Pulver dosiert nach Massgabe der Aufnahme¬ fähigkeit der Vertiefungen im Zwischenträger einem Pulvervorratsbehältnis entnommen wird und anschlies- send in die Vertiefungen geräkelt wird.8. The method according to claim 1, characterized in that the powder dosed according to the capacity of the wells in the intermediate carrier is removed from a powder storage container and is then worked into the wells.
- JUEX- JUEX
O PIO PI
^ ,0 ^, 0
EP83903082A 1982-10-18 1983-10-10 Method for coating back-cloth with a powdery synthetic product Expired - Lifetime EP0122264B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83903082T ATE19964T1 (en) 1982-10-18 1983-10-10 PROCESS FOR COATING TEXTILE UNDERLAYS WITH PLASTIC POWDER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH604582 1982-10-18
CH6045/82 1982-10-18

Publications (3)

Publication Number Publication Date
EP0122264A1 true EP0122264A1 (en) 1984-10-24
EP0122264B1 EP0122264B1 (en) 1986-05-28
EP0122264B2 EP0122264B2 (en) 1991-09-04

Family

ID=4303332

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Application Number Title Priority Date Filing Date
EP83903082A Expired - Lifetime EP0122264B2 (en) 1982-10-18 1983-10-10 Method for coating back-cloth with a powdery synthetic product

Country Status (6)

Country Link
US (1) US4571351A (en)
EP (1) EP0122264B2 (en)
JP (1) JPS59501855A (en)
DE (1) DE3363796D1 (en)
IT (1) IT1167252B (en)
WO (1) WO1984001526A1 (en)

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EP0692568A1 (en) 1994-07-12 1996-01-17 DICKSON SAINT CLAIR, Sàrl Process for the coating of a textile support, means for executing the process, and support obtained by the process

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US5552012A (en) * 1994-09-09 1996-09-03 Kimberly-Clark Corporation Placement of electric-field-responsive material onto a substrate
US5895542A (en) * 1994-11-23 1999-04-20 Appleton Papers Incorporated Coater and a method for coating a substrate
FR2745595B1 (en) * 1996-02-29 1998-05-22 Picardie Lainiere THERMAL ADHESIVE COVER AND MANUFACTURING METHOD THEREOF
US5925406A (en) * 1997-07-18 1999-07-20 The Procter & Gamble Co. Method of making a gas permeable material
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EP0692568A1 (en) 1994-07-12 1996-01-17 DICKSON SAINT CLAIR, Sàrl Process for the coating of a textile support, means for executing the process, and support obtained by the process

Also Published As

Publication number Publication date
EP0122264B1 (en) 1986-05-28
WO1984001526A1 (en) 1984-04-26
JPS59501855A (en) 1984-11-08
JPH0422632B2 (en) 1992-04-20
IT8323154A0 (en) 1983-10-05
IT1167252B (en) 1987-05-13
EP0122264B2 (en) 1991-09-04
DE3363796D1 (en) 1986-07-03
IT8323154A1 (en) 1985-04-05
US4571351A (en) 1986-02-18

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