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EP3757268A1 - Method for producing and / or finishing a glass mat sheet - Google Patents

Method for producing and / or finishing a glass mat sheet Download PDF

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Publication number
EP3757268A1
EP3757268A1 EP20174303.6A EP20174303A EP3757268A1 EP 3757268 A1 EP3757268 A1 EP 3757268A1 EP 20174303 A EP20174303 A EP 20174303A EP 3757268 A1 EP3757268 A1 EP 3757268A1
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EP
European Patent Office
Prior art keywords
infrared radiation
dryer
glass nonwoven
nonwoven web
radiation dryer
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
EP20174303.6A
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German (de)
French (fr)
Other versions
EP3757268B1 (en
Inventor
Philipp KÜCKMANN
Franziska FERRER
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Voith Patent GmbH
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Voith Patent GmbH
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
    • F26B13/104—Supporting materials without tension, e.g. on or between foraminous belts supported by fluid jets only; Fluid blowing arrangements for flotation dryers, e.g. coanda nozzles
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/001—Treatment with visible light, infrared or ultraviolet, X-rays
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass fibres
    • D04H1/4226—Glass fibres characterised by the apparatus for manufacturing the glass fleece
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/655—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions characterised by the apparatus for applying bonding agents
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/002—Inorganic yarns or filaments
    • D04H3/004—Glass yarns or filaments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/30—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00—Inorganic fibres
    • D10B2101/02—Inorganic fibres based on oxides or oxide ceramics, e.g. silicates
    • D10B2101/06—Glass

Definitions

  • the present invention relates to a method for producing and / or finishing a glass nonwoven web, the method comprising the following step: thermal drying of the glass nonwoven web by means of infrared radiation from an infrared radiation dryer.
  • the present invention also relates to a corresponding device for performing the method.
  • the binder applied during production can also be "blown" by excessively high air velocities, which leads to a limitation of the specific energy input and thus to slow immobilization or later solidification of the glass fleece.
  • a method for the production and / or finishing of a glass nonwoven web comprises the following step: thermal drying of the glass nonwoven web by means of infrared radiation from an infrared radiation dryer, and which is particularly characterized in that the surface of the glass nonwoven web facing the infrared radiation dryer by the infrared radiation dryer a specific power density of at least 153 kW / m 2 is applied, and that the glass nonwoven web has a temperature on its surface facing the infrared radiation dryer of at least 40 ° C and at most 105 ° C after being irradiated by the infrared radiation dryer.
  • the inventors have found that glass nonwovens withstand exposure to such a high specific power density, which is at least 153 kW / m 2 , unexpectedly unscathed, provided that care is taken that the temperature on the surface is within a moderate range of 40 ° C remains up to 105 ° C.
  • the high specific power density makes it possible to drive high process speeds.
  • the temperature on the surface of the infrared radiation dryer facing the infrared dryer depends largely on the length of the infrared radiation dryer in the process direction and on the speed at which the glass nonwoven web is guided past the infrared radiation dryer relative to the latter. Both factors have an influence on the length of time with which a surface section of the glass nonwoven web is exposed to the infrared radiation of the infrared radiation dryer.
  • the glass nonwoven web is to be refined by applying a line, this is preferably applied to the surface of the glass nonwoven facing the infrared radiation dryer immediately before the glass nonwoven is dried by means of infrared radiation from the infrared radiation dryer. “Immediately” in this context means that no other machine units should be provided between the application unit and the infrared radiation dryer. Thus, the distance between the applicator and the infrared radiation dryer can be kept small and the glass nonwoven web coated with the coating can be guided through the infrared radiation dryer in a free pull, that is to say without contact. This is advantageous for the quality of the coating application, which must be protected from contact before it dries through.
  • a curtain application is particularly suitable as an application for the line.
  • the glass nonwoven web After the glass nonwoven web has been dried by means of infrared radiation from the infrared radiation dryer, the glass nonwoven web can furthermore be dried by hot air in a hot air dryer.
  • This can be economically advantageous, since infrared radiation dryers generally have higher operating costs than hot air dryers.
  • the hot air dryer which usually works according to the impingement flow principle, can then be used for subsequent drying without "blowing" the applied line or binding agent to fear.
  • a distance of less than 50 cm, preferably less than 30 cm, between the hot air dryer and the infrared radiation dryer is available. In this way it can be ensured that the temperature of the surface of the glass nonwoven web irradiated by the infrared radiation dryer does not drop significantly before the glass nonwoven web is guided into the hot air dryer.
  • Another aspect of the present invention relates to a device for the production and / or finishing of a glass nonwoven web, the device comprising an infrared radiation dryer for thermal drying of the glass nonwoven web by means of infrared radiation, and is particularly characterized in that the infrared radiation dryer is designed that the surface of the infrared radiation dryer facing the To apply a specific power density of at least 153 kW / m 2 to the glass nonwoven web, the device being designed such that the glass nonwoven web has a temperature on its surface facing the infrared radiation dryer of at least 40 ° C and at most 105 ° C after being irradiated by the infrared radiation dryer .
  • the device is preferably designed to carry out the previously described method according to the invention.
  • Figure 1 shows a first embodiment of a device according to the invention.
  • a glass nonwoven web G coated with a binding agent or a line is passed through a dryer 10 (from left to right in Figure 1 ).
  • the binding agent or the coating can have been applied to a surface of the same immediately before the glass nonwoven web G is dried, for example by a curtain applicator (not shown here).
  • the dryer 10 comprises an infrared radiation dryer 20 arranged upstream, viewed in the process direction, and a hot air dryer 30 arranged downstream.
  • the distance A between the infrared radiation dryer 20 and the hot air dryer 30 is less than 30cm here.
  • the infrared radiation dryer 20 can for its part comprise several modules, each module of which in turn can have several rows of individual infrared radiators.
  • the infrared radiation dryer comprises two modules 21, 22, which each have two rows of infrared radiators.
  • each of the two modules 21, 22 also has a fresh air supply and a used air discharge, the air flows in Figure 1 are marked with arrows.
  • the dryer extends over the entire width (orthogonal to the image plane in Figure 1 ) the glass nonwoven web to be dried (G).
  • the surface of the glass nonwoven web G facing the infrared radiation dryer is acted upon by the infrared radiation dryer 20 with a specific power density of at least 153 kW / m 2 .
  • a suitable choice of the overall length of the infrared radiation dryer 20 and the speed with which the glass nonwoven web G is guided through the dryer 10 ensures that the glass nonwoven web has a temperature of at least 40 on its surface facing the infrared radiation dryer 20 after being irradiated by the infrared radiation dryer 20 ° C and a maximum of 105 ° C.
  • a temperature sensor T can be installed in the dryer 10 which is suitable for determining the temperature on the surface of the glass nonwoven web at the end of the infrared radiation dryer 20 without contact, for example by means of laser technology.
  • the hot air dryer 30 is designed to blow hot air, which it obtains from a source not shown here, onto the surface of the glass nonwoven web G to be dried. The drying takes place primarily through the impingement flow principle.
  • the dryer in the second exemplary embodiment is designed as a combination dryer unit 12.
  • warm air from the used air discharge of the two modules 21, 22 of the infrared radiation dryer 20 is at least partially fed to the hot air dryer 30.
  • the infrared radiation dryer 20 and the hot air dryer 30 of the combination dryer unit 12 can also have a common housing.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

Die Erfindung betrifft ein Verfahren zur Herstellung und/oder Veredelung einer Glasvliesstoffbahn (G), wobei das Verfahren den folgenden Schritt umfasst: thermisches Trocknen der Glasvliesstoffbahn (G) mittels Infrarotstrahlung aus einem Infrarotstrahlungstrockner (20), wobei die dem Infrarotstrahlungstrockner (20) zugewandte Oberfläche der Glasvliesstoffbahn (G) durch den Infrarotstrahlungstrockner (20) mit einer spezifischen Leistungsdichte von wenigstens 153 kW/m<sup>2</sup> beaufschlagt wird, und wobei die Glasvliesstoffbahn (G) nach der Bestrahlung durch den Infrarotstrahlungstrockner (20) eine Temperatur an ihrer dem Infrarotstrahlungstrockner (20) zugewandten Oberfläche von wenigstens 40°C und höchstens 105°C aufweist. Ferner betrifft die Erfindung eine Vorrichtung zum Durchführen dieses Verfahrens.The invention relates to a method for producing and / or finishing a glass nonwoven web (G), the method comprising the following step: thermal drying of the glass nonwoven web (G) by means of infrared radiation from an infrared radiation dryer (20), the surface facing the infrared radiation dryer (20) the glass nonwoven web (G) is acted upon by the infrared radiation dryer (20) with a specific power density of at least 153 kW / m <sup> 2 </sup>, and wherein the glass nonwoven web (G) has a temperature after being irradiated by the infrared radiation dryer (20) has at its surface facing the infrared radiation dryer (20) of at least 40 ° C and at most 105 ° C. The invention also relates to a device for performing this method.

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung und/oder Veredelung einer Glasvliesstoffbahn, wobei das Verfahren den folgenden Schritt umfasst: thermisches Trocknen der Glasvliesstoffbahn mittels Infrarotstrahlung aus einem Infrarotstrahlungstrockner. Ferner betrifft die vorliegende Erfindung auch eine entsprechende Vorrichtung zum Durchführen des Verfahrens.The present invention relates to a method for producing and / or finishing a glass nonwoven web, the method comprising the following step: thermal drying of the glass nonwoven web by means of infrared radiation from an infrared radiation dryer. The present invention also relates to a corresponding device for performing the method.

Bei der Veredelung von Glasvliesen wird häufig ein Strich auf selbige aufgetragen, analog wie dies beim Streichen von Papier bekannt ist. In der Regel erfolgt die anschließende Trocknung des Strichs mittels konventioneller Lufttrockner, die nach dem Prallströmprinzip funktionieren. Da Glasvliese jedoch, anders als Papier, eine hohe Porosität aufweisen, kann die Blasluft nur mit geringer Strömungsgeschwindigkeit auf die bestrichene Glasvliesoberfläche geblasen werden, um ein "Verblasen" des Strichs zu vermeiden. Als Folge hieraus ergeben sich geringe Wärmeübergangskoeffizienten und ein geringer Energieeintrag. Für den Strich bedeutet dies eine langsamere Immobilisierung.When refining glass fleeces, a line is often applied to the same, analogous to what is known when painting paper. As a rule, the coating is then dried using conventional air dryers that work according to the impingement flow principle. Since glass fleece, unlike paper, has a high porosity, the blown air can only be blown onto the coated glass fleece surface at a low flow rate in order to avoid "blowing" the line. As a result, there are low heat transfer coefficients and a low energy input. For the bottom line, this means slower immobilization.

Analoges gilt auch für die Herstellung von Glasvliesen. Der bei der Herstellung aufgebrachte Binder kann ebenfalls durch zu hohe Luftgeschwindigkeiten "verblasen" werden, was zu einer Begrenzung des spezifischen Energieeintrags und damit zu einer langsamen Immobilisierung bzw. einer späteren Verfestigung des Glasvlieses führt.The same applies to the production of glass fleeces. The binder applied during production can also be "blown" by excessively high air velocities, which leads to a limitation of the specific energy input and thus to slow immobilization or later solidification of the glass fleece.

In der DE 10 2016 120 933 A1 der Anmelderin wurde bereits vorgeschlagen, die Trocknung des Binders oder Strichs bei Glasvliesen mittels Infrarotstrahlung aus einem Infrarotstrahlungstrockner zumindest teilweise durchzuführen. Hierdurch wird die Gefahr des "Verblasens" reduziert und eine Immobilisierung des Strichs bzw. Verfestigung des Glasvlieses kann schneller erfolgen.In the DE 10 2016 120 933 A1 it has already been proposed to the applicant to at least partially carry out the drying of the binder or coating in the case of glass fleeces by means of infrared radiation from an infrared radiation dryer. This reduces the risk of "fading" and immobilization of the line or solidification of the glass fleece can take place more quickly.

Nachteilig bei diesem bekannten Verfahren ist jedoch, dass die Immobilisierung des Strichs bzw. Verfestigung des Glasvlieses nach wie vor eine gewisse Zeit benötigt, was sich negativ auf die Produktionsmenge pro Zeit auswirkt.The disadvantage of this known method, however, is that the immobilization of the line or solidification of the glass fleece still requires a certain amount of time, which has a negative effect on the production volume per time.

Es ist Aufgabe der vorliegenden Erfindung, den zuvor genannten Nachteil aus dem Stand der Technik zumindest zu reduzieren.It is the object of the present invention to at least reduce the aforementioned disadvantage from the prior art.

Gelöst wird diese Aufgabe durch die Merkmale der unabhängigen Ansprüche. Die abhängigen Ansprüche haben vorteilhafte Weiterbildungen der Erfindung zum Gegenstand.This object is achieved by the features of the independent claims. The dependent claims relate to advantageous developments of the invention.

So wird erfindungsgemäß ein Verfahren zur Herstellung und/oder Veredelung einer Glasvliesstoffbahn gelehrt, welches den folgenden Schritt umfasst: thermisches Trocknen der Glasvliesstoffbahn mittels Infrarotstrahlung aus einem Infrarotstrahlungstrockner, und welches sich besonders dadurch auszeichnet, dass die dem Infrarotstrahlungstrockner zugewandte Oberfläche der Glasvliesstoffbahn durch den Infrarotstrahlungstrockner mit einer spezifischen Leistungsdichte von wenigstens 153 kW/m2 beaufschlagt wird, und dass die Glasvliesstoffbahn nach der Bestrahlung durch den Infrarotstrahlungstrockner eine Temperatur an ihrer dem Infrarotstrahlungstrockner zugewandten Oberfläche von wenigstens 40°C und höchstens 105°C aufweist.Thus, according to the invention, a method for the production and / or finishing of a glass nonwoven web is taught, which comprises the following step: thermal drying of the glass nonwoven web by means of infrared radiation from an infrared radiation dryer, and which is particularly characterized in that the surface of the glass nonwoven web facing the infrared radiation dryer by the infrared radiation dryer a specific power density of at least 153 kW / m 2 is applied, and that the glass nonwoven web has a temperature on its surface facing the infrared radiation dryer of at least 40 ° C and at most 105 ° C after being irradiated by the infrared radiation dryer.

Die Erfinder haben herausgefunden, dass Glasvliesstoffe die Beaufschlagung mit einer derart hohen spezifischen Leistungsdichte, die wenigstens 153 kW/m2 beträgt, wider Erwartet unbeschadet überstehen, sofern dafür Sorge getragen wird, dass die Temperatur an der Oberfläche in einem moderaten Rahmen von 40°C bis 105°C bleibt. Die hohe spezifische Leistungsdichte erlaubt es, hohe Prozessgeschwindigkeiten zu fahren. Die Temperatur an der dem Infrarottrockner zugewandten Oberfläche des Infrarotstrahlungstrockners hängt maßgeblich ab von der Erstreckungslänge des Infrarotstrahlungstrockners in Prozessrichtung und von der Geschwindigkeit, mit der die Glasvliesstoffbahn relativ zu dem Infrarotstrahlungstrockner an diesem vorbeigeführt wird. Beide Faktoren haben einen Einfluss auf die Zeitdauer, mit welcher ein Flächenabschnitt der Glasvliesstoffbahn der Infrarotstrahlung des Infrarotstrahlungstrockners ausgesetzt ist.The inventors have found that glass nonwovens withstand exposure to such a high specific power density, which is at least 153 kW / m 2 , unexpectedly unscathed, provided that care is taken that the temperature on the surface is within a moderate range of 40 ° C remains up to 105 ° C. The high specific power density makes it possible to drive high process speeds. The temperature on the surface of the infrared radiation dryer facing the infrared dryer depends largely on the length of the infrared radiation dryer in the process direction and on the speed at which the glass nonwoven web is guided past the infrared radiation dryer relative to the latter. Both factors have an influence on the length of time with which a surface section of the glass nonwoven web is exposed to the infrared radiation of the infrared radiation dryer.

Soll die Glasvliesstoffbahn durch das Aufbringen eines Strichs veredelt werden, so wird dieser vorzugsweise unmittelbar vor dem Trocknen der Glasvliesstoffbahn mittels Infrarotstrahlung aus dem Infrarotstrahlungstrockner auf die dem Infrarotstrahlungstrockner zugewandten Oberfläche der Glasvliesstoffbahn aufgebracht. "Unmittelbar" bedeutet in diesem Zusammenhang, dass keine anderen Maschinenaggregate zwischen dem Auftragswerk und dem Infrarotstrahlungstrockner vorgesehen sein sollen. Somit kann die Wegstrecke zwischen Auftragswerk und Infrarotstrahlungstrockner klein gehalten werden und kann die mit dem Strich beschichtete Glasvliesstoffbahn im freien Zug, also kontaktfrei, durch den Infrarotstrahlungstrockner geführt werden. Dies ist für die Qualität des Strichauftrags von Vorteil, welcher vor seinem Durchtrocknen vor Kontakt geschützt werden muss. Als Auftragswerk für den Strich eignet sich besonders gut ein Vorhangauftragswerk.If the glass nonwoven web is to be refined by applying a line, this is preferably applied to the surface of the glass nonwoven facing the infrared radiation dryer immediately before the glass nonwoven is dried by means of infrared radiation from the infrared radiation dryer. “Immediately” in this context means that no other machine units should be provided between the application unit and the infrared radiation dryer. Thus, the distance between the applicator and the infrared radiation dryer can be kept small and the glass nonwoven web coated with the coating can be guided through the infrared radiation dryer in a free pull, that is to say without contact. This is advantageous for the quality of the coating application, which must be protected from contact before it dries through. A curtain application is particularly suitable as an application for the line.

Nach dem Trocknen der Glasvliesstoffbahn mittels Infrarotstrahlung aus dem Infrarotstrahlungstrockner kann die Glasvliesstoffbahn ferner durch Heißluft in einem Heißlufttrockner getrocknet werden. Dies kann wirtschaftlich vorteilhaft sein, da Infrarotstrahlungstrockner gegenüber Heißlufttrocknern in der Regel höhere Betriebskosten aufweisen. Durch den Infrarotstrahlungstrockner lässt sich jedoch eine schnelle Immobilisierung des Strichs oder des Bindemittels auf der Glasvliesstoffbahn erzielen, so dass zum anschließenden Durchtrocknen dann der Heißlufttrockner, welcher in der Regel nach dem Prallströmprinzip arbeitet, verwendet werden kann, ohne das ein "Verblasen" des aufgetragenen Strichs oder Bindermittels befürchten zu müssen.After the glass nonwoven web has been dried by means of infrared radiation from the infrared radiation dryer, the glass nonwoven web can furthermore be dried by hot air in a hot air dryer. This can be economically advantageous, since infrared radiation dryers generally have higher operating costs than hot air dryers. With the infrared radiation dryer, however, a quick immobilization of the line or the binding agent on the glass nonwoven web can be achieved, so that the hot air dryer, which usually works according to the impingement flow principle, can then be used for subsequent drying without "blowing" the applied line or binding agent to fear.

Besonders wirtschaftlich lassen sich diese beiden Trocknertypen zusammen betreiben, wenn der Infrarotstrahlungstrockner und der in Laufrichtung der Glasvliesstoffbahn nachgeschaltete Heißlufttrockner als Kombinationstrocknereinheit ausgebildet sind. Es können auch mehrere solcher Kombinationstrocknereinheiten hintereinander angeordnet sein. Dabei wird vorzugsweise heiße Luft aus dem Infrarotstrahlungstrockner abgesaugt und zumindest teilweise dem Heißlufttrockner zugeführt. Dies macht den Prozess besonders Energieeffizient.These two types of dryers can be operated together particularly economically if the infrared radiation dryer and the hot air dryer connected downstream in the direction of travel of the glass nonwoven web are designed as a combination dryer unit. Several such combination dryer units can also be arranged one behind the other. Hot air is preferably sucked out of the infrared radiation dryer and at least partially fed to the hot air dryer. This makes the process particularly energy efficient.

Es ist vorteilhaft, wenn zwischen dem Heißlufttrockner und dem Infrarotstrahlungstrockner ein Abstand von weniger als 50cm, vorzugsweise von weniger als 30cm, vorhanden ist. Auf diese Weise kann sichergesellt werden, dass die Temperatur der von dem Infrarotstrahlungstrockner bestrahlten Oberfläche der Glasvliesstoffbahn nicht nennenswert absinkt, ehe die Glasvliesstoffbahn in den Heißlufttrockner geführt wird.It is advantageous if a distance of less than 50 cm, preferably less than 30 cm, between the hot air dryer and the infrared radiation dryer is available. In this way it can be ensured that the temperature of the surface of the glass nonwoven web irradiated by the infrared radiation dryer does not drop significantly before the glass nonwoven web is guided into the hot air dryer.

Ein weiterer Aspekt der vorliegenden Erfindung betrifft eine Vorrichtung zur Herstellung und/oder Veredelung einer Glasvliesstoffbahn, wobei die Vorrichtung einen Infrarotstrahlungstrockner zum thermischen Trocknen der Glasvliesstoffbahn mittels Infrarotstrahlung umfasst, und sich dadurch besonders auszeichnet, dass der Infrarotstrahlungstrockner ausgelegt ist, die dem Infrarotstrahlungstrockner zugewandten Oberfläche der Glasvliesstoffbahn mit einer spezifischen Leistungsdichte von wenigstens 153 kW/m2 zu beaufschlagen, wobei die Vorrichtung so ausgelegt ist, dass die Glasvliesstoffbahn nach der Bestrahlung durch den Infrarotstrahlungstrockner eine Temperatur an ihrer dem Infrarotstrahlungstrockner zugewandten Oberfläche von wenigstens 40°C und höchstens 105°C aufweist. Vorzugsweise ist die Vorrichtung ausgelegt, das zuvor beschriebene, erfindungsgemäße Verfahren durchzuführen.Another aspect of the present invention relates to a device for the production and / or finishing of a glass nonwoven web, the device comprising an infrared radiation dryer for thermal drying of the glass nonwoven web by means of infrared radiation, and is particularly characterized in that the infrared radiation dryer is designed that the surface of the infrared radiation dryer facing the To apply a specific power density of at least 153 kW / m 2 to the glass nonwoven web, the device being designed such that the glass nonwoven web has a temperature on its surface facing the infrared radiation dryer of at least 40 ° C and at most 105 ° C after being irradiated by the infrared radiation dryer . The device is preferably designed to carry out the previously described method according to the invention.

Die Erfindung wird nachfolgend anhand von schematischen und nicht maßstabsgetreuen Zeichnungen weiter erläutert. Es zeigen:

  • Figur 1 eine erste Ausführungsform einer erfindungsgemäßen Vorrichtung, und
  • Figur 2 eine zweite Ausführungsform einer erfindungsgenmäßen Vorrichtung.
The invention is further explained below with reference to schematic drawings that are not true to scale. Show it:
  • Figure 1 a first embodiment of a device according to the invention, and
  • Figure 2 a second embodiment of a device according to the invention.

Figur 1 zeigt eine erste Ausführungsform einer erfindungsgemäßen Vorrichtung. Dabei wird eine mit einem Bindemittel oder einem Strich beschichtete Glasvliesstoffbahn G durch einen Trockner 10 geführt (von links nach rechts in Figur 1). Das Bindemittel oder der Strich können unmittelbar vor dem Trocknen der Glasvliesstoffbahn G auf eine Oberfläche selbiger aufgebracht worden sein, beispielsweise durch ein hier nicht dargestelltes Vorhangauftragswerk. Figure 1 shows a first embodiment of a device according to the invention. A glass nonwoven web G coated with a binding agent or a line is passed through a dryer 10 (from left to right in Figure 1 ). The binding agent or the coating can have been applied to a surface of the same immediately before the glass nonwoven web G is dried, for example by a curtain applicator (not shown here).

Der Trockner 10 umfasst einen in Prozessrichtung betrachtet stromaufwärts angeordneten Infrarotstrahlungstrockner 20 und einen stromabwärts angeordneten Heißlufttrockner 30. Der Abstand A zwischen dem Infrarotstrahlungstrockner 20 und dem Heißlufttrockner 30 beträgt hier weniger als 30cm. Der Infrarotstrahlungstrockner 20 kann seinerseits mehrere Module umfassen, von denen jedes Modul wiederum mehrere Reihen an einzelnen Infrarotstrahlern aufweisen kann. In dem hier dargestellten Ausführungsbeispiel umfass der Infrarotstrahlungstrockner zwei Module 21, 22, welche jeweils zwei Reihen von Infrarotstrahlern aufweisen. Zudem weist jedes der beidem Module 21, 22 auch noch eine Frischluftzufuhr und eine Gebrauchtluftabfuhr auf, wobei die Luftströme in Figur 1 mit Pfeilen gekennzeichnet sind. Der Trockner erstreckt sich dabei über die gesamte Breite (orthogonal zur Bildebene in Figur 1) der zur trocknenden Glasvliesstoffbahn (G).The dryer 10 comprises an infrared radiation dryer 20 arranged upstream, viewed in the process direction, and a hot air dryer 30 arranged downstream. The distance A between the infrared radiation dryer 20 and the hot air dryer 30 is less than 30cm here. The infrared radiation dryer 20 can for its part comprise several modules, each module of which in turn can have several rows of individual infrared radiators. In the embodiment shown here, the infrared radiation dryer comprises two modules 21, 22, which each have two rows of infrared radiators. In addition, each of the two modules 21, 22 also has a fresh air supply and a used air discharge, the air flows in Figure 1 are marked with arrows. The dryer extends over the entire width (orthogonal to the image plane in Figure 1 ) the glass nonwoven web to be dried (G).

Erfindungsgemäß wird die dem Infrarotstrahlungstrockner zugewandten Oberfläche der Glasvliesstoffbahn G durch den Infrarotstrahlungstrockner 20 mit einer spezifischen Leistungsdichte von wenigstens 153 kW/m2 beaufschlagt. Gleichzeitig wird durch geeignete Wahl der Baulänge des Infrarotstrahlungstrockners 20 und der Geschwindigkeit, mit welcher die Glasvliesstoffbahn G durch den Trockner 10 geführt wird, sichergestellt, dass die Glasvliesstoffbahn nach der Bestrahlung durch den Infrarotstrahlungstrockner 20 eine Temperatur an ihrer dem Infrarotstrahlungstrockner 20 zugewandten Oberfläche von wenigstens 40°C und höchstens 105°C aufweist. Zur Überwachung der Oberflächentemperatur kann in dem Trockner 10 ein Temperatursensor T installiert sein, der geeignet ist, kontaktlos, beispielsweise mittels Laser-Technologie, die Temperatur auf der Oberfläche der Glasvliesstoffbahn am Ende des Infrarotstrahlungstrockners 20 zu bestimmen.According to the invention, the surface of the glass nonwoven web G facing the infrared radiation dryer is acted upon by the infrared radiation dryer 20 with a specific power density of at least 153 kW / m 2 . At the same time, a suitable choice of the overall length of the infrared radiation dryer 20 and the speed with which the glass nonwoven web G is guided through the dryer 10 ensures that the glass nonwoven web has a temperature of at least 40 on its surface facing the infrared radiation dryer 20 after being irradiated by the infrared radiation dryer 20 ° C and a maximum of 105 ° C. To monitor the surface temperature, a temperature sensor T can be installed in the dryer 10 which is suitable for determining the temperature on the surface of the glass nonwoven web at the end of the infrared radiation dryer 20 without contact, for example by means of laser technology.

Der Heißlufttrockner 30 ist ausgebildet, heiße Luft, die er aus einer hier nicht dargestellten Quelle bezieht, auf die zu trocknende Oberfläche der Glasvliesstoffbahn G zu blasen. Dabei erfolgt die Trocknung primär durch das Prallströmprinzip.The hot air dryer 30 is designed to blow hot air, which it obtains from a source not shown here, onto the surface of the glass nonwoven web G to be dried. The drying takes place primarily through the impingement flow principle.

Das in Figur 2 dargestellte zweite Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung unterscheidet sich nur geringfügig von dem in Figur 1 dargestellten ersten Ausführungsbeispiel. Daher wird im Folgenden nur auf die Unterschiede eingegangen und im Übrigen auf die obige Beschreibung verwiesen. Der Hauptunterschied liegt darin, dass der Trockner im zweiten Ausführungsbeispiel als Kombinationstrocknereinheit 12 ausgebildet ist. Dabei wird warme Luft aus der Gebrauchtluftabfuhr der beiden Module 21, 22 des Infrarotstrahlungstrockners 20 zumindest teilweise dem Heißlufttrockner 30 zugeführt. Dies bedeutet nicht, dass der Heißlufttrockner 30 mit keiner weiteren Quelle für heiße Luft mehr verbunden ist, jedoch hilft die Führung von heißer Luft von dem Infrarotstrahlungstrockner 20 zu dem Heißlufttrockner 30, den Energiebedarf insgesamt zu senken. Der Infrarotstrahlungstrockner 20 und der Heißlufttrockner 30 der Kombinationstrocknereinheit 12 können zudem eine gemeinsame Einhausung aufweisen.This in Figure 2 The illustrated second embodiment of a device according to the invention differs only slightly from that in Figure 1 illustrated first embodiment. Therefore, the following will only focus on the differences received and otherwise referred to the description above. The main difference is that the dryer in the second exemplary embodiment is designed as a combination dryer unit 12. Here, warm air from the used air discharge of the two modules 21, 22 of the infrared radiation dryer 20 is at least partially fed to the hot air dryer 30. This does not mean that the hot air dryer 30 is no longer connected to any other source of hot air, but the guiding of hot air from the infrared radiation dryer 20 to the hot air dryer 30 helps to reduce the overall energy requirement. The infrared radiation dryer 20 and the hot air dryer 30 of the combination dryer unit 12 can also have a common housing.

Bezugszeichenliste:List of reference symbols:

1010
Trocknerdryer
1212th
KombinationstrocknereinheitCombination dryer unit
2020th
InfrarotstrahlungstrocknerInfrared radiation dryer
2121st
Modulmodule
2222nd
Modulmodule
3030th
HeißlufttrocknerHot air dryer
GG
GlasvliesstoffbahnGlass nonwoven web
TT
TemperatursensorTemperature sensor

Claims (9)

Verfahren zur Herstellung und/oder Veredelung einer Glasvliesstoffbahn (G), wobei das Verfahren den folgenden Schritt umfasst: thermisches Trocknen der Glasvliesstoffbahn (G) mittels Infrarotstrahlung aus einem Infrarotstrahlungstrockner (20),
dadurch gekennzeichnet, dass die dem Infrarotstrahlungstrockner (20) zugewandte Oberfläche der Glasvliesstoffbahn (G) durch den Infrarotstrahlungstrockner (20) mit einer spezifischen Leistungsdichte von wenigstens 153 kW/m2 beaufschlagt wird, und dass die Glasvliesstoffbahn (G) nach der Bestrahlung durch den Infrarotstrahlungstrockner (20) eine Temperatur an ihrer dem Infrarotstrahlungstrockner (20) zugewandten Oberfläche von wenigstens 40°C und höchstens 105°C aufweist.A method for producing and / or finishing a glass nonwoven web (G), the method comprising the following step: thermal drying of the glass nonwoven web (G) by means of infrared radiation from an infrared radiation dryer (20),
characterized in that the surface of the glass nonwoven fabric web (G) facing the infrared radiation dryer (20) is acted upon by the infrared radiation dryer (20) with a specific power density of at least 153 kW / m 2 , and that the glass nonwoven fabric web (G) after irradiation by the infrared radiation dryer (20) has a temperature on its surface facing the infrared radiation dryer (20) of at least 40 ° C and at most 105 ° C. Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass unmittelbar vor dem Trocknen der Glasvliesstoffbahn (G) mittels Infrarotstrahlung aus dem Infrarotstrahlungstrockner (20) ein Strich auf die dem Infrarotstrahlungstrockner (20) zugewandten Oberfläche der Glasvliesstoffbahn (G) aufgebracht wird.Method according to claim 1,
characterized in that immediately before drying the glass nonwoven web (G) by means of infrared radiation from the infrared radiation dryer (20) a line is applied to the surface of the glass nonwoven web (G) facing the infrared radiation dryer (20). Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass nach dem Trocknen der Glasvliesstoffbahn (G) mittels Infrarotstrahlung aus dem Infrarotstrahlungstrockner (20) die Glasvliesstoffbahn (G) ferner durch Heißluft in einem Heißlufttrockner (30) getrocknet wird.Method according to claim 1 or 2,
characterized in that after the glass nonwoven web (G) has been dried by means of infrared radiation from the infrared radiation dryer (20), the glass nonwoven web (G) is further dried by hot air in a hot air dryer (30). Verfahren nach Anspruch 3,
dadurch gekennzeichnet, dass der Infrarotstrahlungstrockner (20) und der in Laufrichtung der Glasvliesstoffbahn (G) nachgeschaltete Heißlufttrockner (30) als Kombinationstrocknereinheit (12) ausgebildet sind.Method according to claim 3,
characterized in that the infrared radiation dryer (20) and the hot air dryer (30) connected downstream in the running direction of the glass nonwoven web (G) are designed as a combination dryer unit (12). Verfahren nach Anspruch 4,
dadurch gekennzeichnet, dass mehrere Kombinationstrocknereinheiten (12) in Laufrichtung der Glasvliesstoffbahn (G) hintereinander angeordnet sind.Method according to claim 4,
characterized in that several combination dryer units (12) are arranged one behind the other in the running direction of the glass nonwoven web (G). Verfahren nach einem der Ansprüche 3-5,
dadurch gekennzeichnet, dass heiße Luft aus dem Infrarotstrahlungstrockner (20) abgesaugt und zumindest teilweise dem Heißlufttrockner (30) zugeführt wird.Method according to one of claims 3-5,
characterized in that hot air is sucked out of the infrared radiation dryer (20) and at least partially fed to the hot air dryer (30). Verfahren nach einem der Ansprüche 3-6,
dadurch gekennzeichnet, dass zwischen dem Heißlufttrockner (30) und dem Infrarotstrahlungstrockner (20) ein Abstand (A) von weniger als 50cm, vorzugsweise von weniger als 30cm, vorhanden ist.Method according to one of claims 3-6,
characterized in that there is a distance (A) of less than 50 cm, preferably less than 30 cm, between the hot air dryer (30) and the infrared radiation dryer (20). Vorrichtung zur Herstellung und/oder Veredelung einer Glasvliesstoffbahn (G), wobei die Vorrichtung einen Infrarotstrahlungstrockner (20) zum thermischen Trocknen der Glasvliesstoffbahn (G) mittels Infrarotstrahlung umfasst,
dadurch gekennzeichnet, dass der Infrarotstrahlungstrockner (20) ausgelegt ist, die dem Infrarotstrahlungstrockner (20) zugewandten Oberfläche der Glasvliesstoffbahn (G) mit einer spezifischen Leistungsdichte von wenigstens 153 kW/m2 zu beaufschlagen, und wobei die Vorrichtung so ausgelegt ist, dass die Glasvliesstoffbahn (G) nach der Bestrahlung durch den Infrarotstrahlungstrockner (20) eine Temperatur an ihrer dem Infrarotstrahlungstrockner (20) zugewandten Oberfläche von wenigstens 40°C und höchstens 105°C aufweist.Device for producing and / or finishing a glass nonwoven web (G), the device comprising an infrared radiation dryer (20) for thermal drying of the glass nonwoven web (G) by means of infrared radiation,
characterized in that the infrared radiation dryer (20) is designed to apply a specific power density of at least 153 kW / m 2 to the surface of the glass nonwoven web (G) facing the infrared radiation dryer (20), and the device is designed so that the glass nonwoven web (G) after the irradiation by the infrared radiation dryer (20) has a temperature on its surface facing the infrared radiation dryer (20) of at least 40 ° C and at most 105 ° C. Vorrichtung nach Anspruch 8,
dadurch gekennzeichnet, dass die Vorrichtung ausgelegt ist, das Verfahren nach einem der Ansprüche 1-7 auszuführen.Device according to claim 8,
characterized in that the device is designed to carry out the method according to any one of claims 1-7.
EP20174303.6A 2019-06-27 2020-05-13 Method for producing and/or finishing a glass mat sheet Active EP3757268B1 (en)

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