EP0363707A2 - Method for making a needled felt from slag wool - Google Patents

Method for making a needled felt from slag wool Download PDF

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Publication number
EP0363707A2
EP0363707A2 EP89117542A EP89117542A EP0363707A2 EP 0363707 A2 EP0363707 A2 EP 0363707A2 EP 89117542 A EP89117542 A EP 89117542A EP 89117542 A EP89117542 A EP 89117542A EP 0363707 A2 EP0363707 A2 EP 0363707A2
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EP
European Patent Office
Prior art keywords
felt
felt web
agent
web
fibers
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EP89117542A
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German (de)
French (fr)
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EP0363707A3 (en
EP0363707B1 (en
Inventor
Lothar Dipl.-Phys. Bihy
Hans Kummermehr
Reinhard Dipl.-Ing. Stoyke
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Saint Gobain Isover G+H AG
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Gruenzweig und Hartmann AG
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Priority to AT89117542T priority Critical patent/ATE92548T1/en
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    • 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
    • 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
    • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres

Definitions

  • the invention relates to a method for producing needle felt from rock wool, according to the preamble of claim 1.
  • rock wool when subjected to a needling process, shows no appreciable improvement in fiber cohesion. It cannot therefore be consolidated as a needle felt by a needling process, so that the required consolidation in practice takes place either through a hardening binder if the felt is required as a more or less rigid plate, or through mechanical means, for example in the form of so-called wire mats , wherein the rock wool felt is quilted by means of a metal wire or the like. While the use of a hardening binder limits the possible use of the rock wool sheet thus formed due to its rigidity and due to the introduction of a non-heat-resistant organic binder, wire mats are not suitable for use in a corrosive environment and the attainable bulk density is limited.
  • An aqueous solution or suspension of a non-metal-containing, volatile organic lubricant is proposed as a lubricant, which does not leave any alkaline substances in the needle felt after it has been driven out.
  • An aromatic or aliphatic polyglycol ether, fatty acid derivatives such as fatty acid ethanolamide, silicone oils or nonionic surfactants and alkali metal-free anionic surfactants are proposed as suitable lubricants.
  • the invention has for its object to provide a method for producing needle felt from rock wool of the type specified in the preamble of claim 1, which leads to a needle felt consisting exclusively of rock wool without the addition of other fibers.
  • rock wool with particularly thin fibers is used, and an agent with an unusually high viscosity for such textile additives is added to these fibers in the sense of a finishing agent.
  • Rock wool fibers with a small average fiber thickness of preferably less than 6 ⁇ m can be obtained in the transverse blowing process or in the nozzle blowing process using the teaching of the older German patent application P 38 07 420 and are therefore available.
  • Finishing agents with a viscosity of preferably For example, over 2000 cP are also available on the market as mineral oil-based dust binders.
  • the high viscosity of the finish which is preferably added to the rockwool in a proportion by weight of the agent of at least 0.05%, based on the weight of the dry rockwool felt, surprisingly allows the sliding movement of the rockwave if the upper limit of 10,000 cP is not exceeded the fibers caught in the needles in their anchoring position in the needle felt, but after the action of the needles has ended due to the high viscosity keeps the fibers in the position found by the needling process in the needle felt.
  • the cohesion between adjacent fibers is improved and is achieved in such a way that the action of the needles is not limited to one thread or very few threads per needle, but rather that the threads directly gripped by the needles have a driving effect on neighboring threads and thus the strength of the needle felt is further improved. Furthermore, this causes the action of the needle to extend to a larger surrounding area of the respective needle, with the result that the entire rock wool web is compacted considerably, for example in multiples, despite the only selective action of the needles, and with a comparatively high bulk density like a thick textile cloth similar to a woolen blanket good strength and manageability as well as the best possible formability.
  • the finishing agent should remain in the needle felt, especially if its dust-binding effect is to be used for the further handling of the needle felt.
  • the needle felt formed in this way is sufficiently stable for further processing and at most has very little springback.
  • the Renault test is based on a Renault method.
  • a sample, format 90 mm x 90 mm, basis weight 5.0 kg / m2 for loose wool and 3.0 kg / m2 for bound material is clamped in a device between perforated plates and pressed together to a thickness of 15 mm.
  • the sample is then pierced with a stamp of 30 mm in diameter and a test speed of 10 mm / min, the axis of which is aligned with the axis of the two openings in the plates.
  • the lower opening has a circular shape and a diameter of 40 ⁇ m in the example, so that there is a gap between the outer circumference of the stamp and the edge of the lower, supporting opening of 5 mm width.
  • the maximum puncture force is measured.
  • the needled felt web soon after it is needled with a heat treatment at a temperature temperature between about 300 ° C and 500 ° C is de-energized.
  • the heat treatment is preferably carried out under pressure loading of the needle felt, in order to avoid a change in the shape of the fibers due to the remaining resilience when the finishing agent is driven out before the tension is released in the rock wool fibers.
  • pressure loading of the needle felt in order to avoid a change in the shape of the fibers due to the remaining resilience when the finishing agent is driven out before the tension is released in the rock wool fibers.
  • the needle felt web can be treated with a conventional dust-binding agent in order to minimize dust accumulation during further handling.
  • Claims 7 to 9 give particularly preferred Aviva average.
  • a softening agent according to claim 8 is available on the market under the name "preparol”, and one according to claim 9 is available under the name “compressol”. These agents have a viscosity between 5,000 cP and 7,000 cP, while other dust-binding agents, sizes or similar substances used in the textile industry have a viscosity of only a few hundred cP.
  • "Preparol” or “compressol” are emulsified in water, and this elmusion with a water content of about 90% can be sprayed onto the fibers in the chute below the fiberizing unit and thus introduced evenly distributed. Excellent results have been obtained using these softening agents in an amount of 0.02 to 0.8 percent by weight, based on the dry weight of the rock wool web.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Paper (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Stringed Musical Instruments (AREA)
  • Artificial Filaments (AREA)

Abstract

By the combination of two measures, namely the use of slag-wool fibres of an especially small average fibre thickness and the addition of a reviving agent of unusually high viscosity, it becomes possible to needle a slag-wool felt, without the addition of any other fibres, to form a needled felt of high strength and good flexibility. When the needled felt is subsequently made stress-free by heat treatment and at the same time the reviving agent is also expelled, the needled felt is obtained as a pure slag-wool needled felt without any organic additives.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Nadelfilz aus Steinwolle, nach dem Oberbegriff des Anspruchs 1.The invention relates to a method for producing needle felt from rock wool, according to the preamble of claim 1.

Es ist bekannt, daß Steinwolle, wenn sie einem Nade­lungsvorgang unterworfen wird, keine merkliche Verbes­serung des Faserzusammenhaltes zeigt. Sie kann somit nicht durch einen Nadelungsvorgang als Nadelfilz verfe­stigt werden, so daß eine erforderliche Verfestigung in der Praxis entweder durch ein aushärtendes Bindemittel erfolgt, wenn der Filz als mehr oder weniger steife Platte benötigt wird, oder durch mechanische Mittel, etwa in Form sog. Drahtmatten, wobei der Steinwollefilz mittels eines Metalldrahtes oder dergleichen versteppt wird. Während die Verwendung eines aushärtenden Binde­mittels die Einsatzmöglichkeit der so gebildeten Stein­wolleplatte infolge ihrer Steifheit und infolge des Eintrags eines nicht hitzebeständigen organischen Bin­demittels beschränkt, eignen sich Drahtmatten nicht für den Einsatz in korrosiver Umgebung und ist die erziel­bare Rohdichte begrenzt.It is known that rock wool, when subjected to a needling process, shows no appreciable improvement in fiber cohesion. It cannot therefore be consolidated as a needle felt by a needling process, so that the required consolidation in practice takes place either through a hardening binder if the felt is required as a more or less rigid plate, or through mechanical means, for example in the form of so-called wire mats , wherein the rock wool felt is quilted by means of a metal wire or the like. While the use of a hardening binder limits the possible use of the rock wool sheet thus formed due to its rigidity and due to the introduction of a non-heat-resistant organic binder, wire mats are not suitable for use in a corrosive environment and the attainable bulk density is limited.

Es hat daher nicht an Versuchen gefehlt, Steinwolle durch eine Vielzahl von Behandlungen und Zusätzen für einen Nadelungsvorgang geeignet zu machen. Beispiels­weise aus der DE-OS 22 32 785, von der die Erfindung im Oberbegriff des Anspruchs 1 ausgeht- ist es bekannte den Steinwollefasern Asbestfasern als vliesbildender Fa­serzusatz zuzumischen, um so einen nadelbaren Filz zu erhalten. Da die Asbestfasern eine außerordentlich hohe Friktion auf die Nadeln der Nadelbank ausüben, wird dem Filz weiterhin ein Gleitmittel zugesetzt- welches nach dem Nadelungsvorgang durch Wärmeeinwirkung wieder aus­getrieben wird. Als Gleitmittel wird hierbei eine wäss­rige Lösung oder Suspension eines nicht metallhaltigen, verflüchtigbaren organischen Gleitmittels vorgeschlagen, welches nach dem Austreiben keine alkalisch reagierenden Substanzen im Nadelfilz zurückläßt. Als geeignete Gleit­mittel werden ein aromatischer oder aliphatischer Polyglykolether, Fettsäurederivate wie Fettsäureetha­nolamid, Silikonöle oder nichtionogene Tenside sowie alkalimetallfreie anionische Tenside vorgeschlagen.There has been no shortage of attempts to make rock wool suitable for a needling process by means of a large number of treatments and additives. For example from DE-OS 22 32 785, from which the invention is based in the preamble of claim 1, it is known to admix the rock wool fibers with asbestos fibers as a non-woven fiber additive in order to obtain a needle felt. Since the asbestos fibers exert an extraordinarily high friction on the needles of the needle bank, this will Felt also added a lubricant - which is expelled again after the needling process by the action of heat. An aqueous solution or suspension of a non-metal-containing, volatile organic lubricant is proposed as a lubricant, which does not leave any alkaline substances in the needle felt after it has been driven out. An aromatic or aliphatic polyglycol ether, fatty acid derivatives such as fatty acid ethanolamide, silicone oils or nonionic surfactants and alkali metal-free anionic surfactants are proposed as suitable lubricants.

Ein Zusatz von Asbestfasern scheidet jedoch infolge der gesundheitsgefährdenden Wirkung von Asbestfasern von vorneherein aus.However, the addition of asbestos fibers is ruled out from the start due to the health-threatening effects of asbestos fibers.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung von Nadelfilz aus Steinwolle der im Oberbegriff des Anspruchs 1 angegebenen Art anzugeben, welches zu einem ausschließlich aus Steinwolle, ohne Zusatz anderer Fasern, bestehenden Nadelfilz führt.The invention has for its object to provide a method for producing needle felt from rock wool of the type specified in the preamble of claim 1, which leads to a needle felt consisting exclusively of rock wool without the addition of other fibers.

Die Lösung dieser Aufgabe erfolgt durch die kennzeich­nenden Merkmale des Anspruchs 1.This object is achieved by the characterizing features of claim 1.

Es hat sich überraschend gezeigt daß die Lösung der Aufgabe dann gelingt, wenn Steinwolle mit besonders dünnen Fasern verwendet wird, und diesen Fasern im Sinne einer Avivage ein Mittel mit für derartige Textilzu­satzstoffe unüblich hoher Viskosität zugesetzt wird. Steinwollefasern mit einer geringen durchschnittlichen Faserdicke von vorzugsweise weniger als 6 µm können im Querblasverfahren oder in Düsenblasverfahren bei Ver­wendung der Lehre der älteren deutschen Patentanmeldung P 38 07 420 erhalten werden und stehen somit zur Verfü­gung. Avivagen mit einer Viskosität von vorzugsweise über 2000 cP stehen beispielsweise als Staubbindemittel auf Mineralölbasis ebenfalls auf dem Markt zur Verfü­gung. Durch die Verwendung besonders dünner Steinwolle­fasern wird deren Sprödigkeit und Biegewiderstand her­abgesetzt, so daß die Fasern leichter von den Nadeln der Nadelbank mitgenommen und in den Steinwollefilz hinein­gezogen bzw., wenn eine ausreichend große Länge der Fa­sern vorliegt, durch diesen hindurchgezogen werden. Die Avivage verbessert die Geschmeidigkeit der dünnen Fasern noch erheblich. Die hohe Viskosität der Avivage, die bevorzugt in einem Gewichtsanteil des Mittels von we­nigstens 0,05 %, bezogen auf das Gewicht des trockenen Steinwollefilzes, der Steinwolle zugesetzt ist, läßt, wenn die Obergrenze von 10.000 cP nicht überschritten wird, überraschend eine Gleitbewegung der von den Nadeln erfaßten Fasern in ihre Verankerungsposition im Nadel­filz zu, hält aber nach Beendigung der Einwirkung der Nadeln infolge der hohen Viskosität die Fasern in der durch den Nadelungsvorgang im Nadelfilz gefundenen Lage. Zugleich wird der Zusammenhalt zwischen benachbarten Fasern verbessert und so erreicht, daß die Einwirkung der Nadeln nicht auf je einen Faden oder ganz wenige Fäden pro Nadel beschränkt ist, sondern von den unmit­telbar von den Nadeln erfaßten Fäden eine Mitnahme­wirkung auf benachbarte Fäden ausgeht und so die Fe­stigkeit des Nadelfilzes weiter verbessert wird. Wei­terhin erfolgt dadurch eine Ausdehnung der Nadeleinwir­kung auf einen größeren Umgebungsbereich der jeweiligen Nadel mit der Folge, daß die gesamte Steinwollebahn trotz der nur punktuellen Einwirkung der Nadeln insge­samt erheblich beispielsweise auf ein Mehrfaches ver­dichtet wird und mit vergleichsweise hoher Rohdichte wie ein dickes textiles Tuch ähnlich einer Wolldecke guter Festigkeit und Handhabbarkeit sowie bestmöglicher Ver­formbarkeit vorliegt.It has surprisingly been found that the object is achieved when rock wool with particularly thin fibers is used, and an agent with an unusually high viscosity for such textile additives is added to these fibers in the sense of a finishing agent. Rock wool fibers with a small average fiber thickness of preferably less than 6 µm can be obtained in the transverse blowing process or in the nozzle blowing process using the teaching of the older German patent application P 38 07 420 and are therefore available. Finishing agents with a viscosity of preferably For example, over 2000 cP are also available on the market as mineral oil-based dust binders. The use of particularly thin rock wool fibers reduces their brittleness and resistance to bending, so that the fibers are more easily carried along by the needles of the needle bank and drawn into the rock wool felt or, if the fibers are of sufficient length, are pulled through them. The finish improves the suppleness of the thin fibers considerably. The high viscosity of the finish, which is preferably added to the rockwool in a proportion by weight of the agent of at least 0.05%, based on the weight of the dry rockwool felt, surprisingly allows the sliding movement of the rockwave if the upper limit of 10,000 cP is not exceeded the fibers caught in the needles in their anchoring position in the needle felt, but after the action of the needles has ended due to the high viscosity keeps the fibers in the position found by the needling process in the needle felt. At the same time, the cohesion between adjacent fibers is improved and is achieved in such a way that the action of the needles is not limited to one thread or very few threads per needle, but rather that the threads directly gripped by the needles have a driving effect on neighboring threads and thus the strength of the needle felt is further improved. Furthermore, this causes the action of the needle to extend to a larger surrounding area of the respective needle, with the result that the entire rock wool web is compacted considerably, for example in multiples, despite the only selective action of the needles, and with a comparatively high bulk density like a thick textile cloth similar to a woolen blanket good strength and manageability as well as the best possible formability.

Es gibt Anwendungsfälle, bei denen die Avivage im Na­delfilz verbleiben soll, insbesondere dann, wenn ihre Staubbindewirkung für die weitere Handhabung des Nadel­filzes genutzt werden soll. Bei Verwendung besonders dünner Steinwollefasern und ggfs. einer erhöhten Zu­satzmenge an Avivage ist der so gebildete Nadelfilz für die weitere Verarbeitung ausreichend stabil und weist allenfalls ganz geringe Rückfederung auf.There are applications in which the finishing agent should remain in the needle felt, especially if its dust-binding effect is to be used for the further handling of the needle felt. When using particularly thin rock wool fibers and, if necessary, an increased amount of finishing agent, the needle felt formed in this way is sufficiently stable for further processing and at most has very little springback.

Eine besonders gute Nadelbarkeit einer Filzbahn ergibt sich gemäß dem Ergebnis durchgeführter Versuche dann, wenn sie eine hohe Durchstoßkraft gemäß der Prüfmethode nach Renault aufweist, wie dies in den Ansprüchen 2 und 3 angegeben ist. Filzbahnen einer solchen Durchstoßkraft weisen nach den vorliegenden Erfahrungen eine Struktur aufs welche die Vernadelbarkeit begünstigt.According to the results of tests carried out, a particularly good needleability of a felt web results when it has a high puncture force according to the Renault test method, as stated in claims 2 and 3. In the experience available, felt webs of such a puncture force have a structure which promotes needlability.

Die Prüfung nach Renault erfolgt in Anlehnung an eine Methode der Firma Renault. Eine Probe, Format 90 mm x 90 mm, Flächengewicht 5,0 kg /m² für lose Wolle und 3,0 kg/m² für gebundenes Material, wird in einer Vorrichtung zwischen gelochten Platten eingespannt und dabei auf eine Dicke von 15 mm zusammengepreßt. Danach wird die Probe mit einem Stempel von 30 mm Durchmesser und 10 mm/min Prüfgeschwindigkeit durchstoßen, dessen Achse mit der Achse der beiden Öffnungen in den Platten fluchtet. Die untere Öffnung hat kreisrunde Form und einen Durchmesser von im Beispielsfalle 40 µm, so daß sich ein Spalt zwischen dem Außenumfang des Stempels und dem Rand der unteren, abstützenden Öffnung von 5 mm Breite ergibt. Gemessen wird die maximale Durchstoß­kraft.The Renault test is based on a Renault method. A sample, format 90 mm x 90 mm, basis weight 5.0 kg / m² for loose wool and 3.0 kg / m² for bound material, is clamped in a device between perforated plates and pressed together to a thickness of 15 mm. The sample is then pierced with a stamp of 30 mm in diameter and a test speed of 10 mm / min, the axis of which is aligned with the axis of the two openings in the plates. The lower opening has a circular shape and a diameter of 40 µm in the example, so that there is a gap between the outer circumference of the stamp and the edge of the lower, supporting opening of 5 mm width. The maximum puncture force is measured.

In besonders bevorzugter Weise ist jedoch gemäß Anspruch 4 vorgesehen, daß die genadelte Filzbahn alsbald nach ihrer Nadelung mit einer Wärmebehandlung bei einer Tem­ peratur zwischen etwa 300°C und 500°C spannungsfrei ge­macht wird. Hierdurch werden die durch den Nadelungs­vorgang und die damit einhergehenden Verformungen von Fasern in die Fasern eingebrachten Biegespannungen ab­gebaut und so jegliche Rückfederungstendenz der Stein­wollefasern ausgeschaltet. Dabei wird zugleich die Avi­vage ausgetrieben, jedoch wird deren Haltewirkung dann auch nicht mehr benötigt, da die Rückfederungstendenzen der Fasern nicht mehr vorliegen.In a particularly preferred manner, however, it is provided according to claim 4 that the needled felt web soon after it is needled with a heat treatment at a temperature temperature between about 300 ° C and 500 ° C is de-energized. As a result, the bending stresses introduced into the fibers by the needling process and the associated deformations of fibers are reduced and any springback tendency of the rock wool fibers is thus eliminated. At the same time, the finishing agent is expelled, but its holding effect is then no longer required, since the springback tendencies of the fibers are no longer present.

Gemäß Anspruch 5 erfolgt die Wärmebehandlung bevorzugt unter Druckbelastung des Nadelfilzes, um beim Austreiben der Avivage vor dem Spannungsabbau in den Steinwollefa­sern eine Formänderung der Fasern infolge des verblei­benden Rückfederungsvermögens zu vermeiden. Wie ohne weiteres ersichtlich ist, ist hierfür nur geringer Druck erforderlich, der ausreicht, die Fasern nach dem Wegfall der hochviskosen Avivage in ihrer nach dem Nadelungs­vorgang im Nadelfilz eingenommenen Stellung zu halten, bis die Spannungen abgebaut sind.According to claim 5, the heat treatment is preferably carried out under pressure loading of the needle felt, in order to avoid a change in the shape of the fibers due to the remaining resilience when the finishing agent is driven out before the tension is released in the rock wool fibers. As can be readily seen, only a small pressure is required for this, which is sufficient to hold the fibers in their position in the needle felt after the needling process has ceased, until the tensions have been relieved.

Da im Falle einer sogleich nachfolgenden Wärmebehandlung bzw. einer unmittelbar an den Nadelungsvorgang am Aus­gang der Nadelmaschine einsetzenden Druckbelastung bis zur Wärmebehandlung die Avivage lediglich für kurze Zeit eine Rückfederung der Steinwollefasern vermeiden muß, kann in diesem Fall mit relativ dickeren Steinfasern an der Obergrenze von 6 µm sowie minimalem Avivagegehalt an der Untergrenze von 0,05 % gearbeitet werden.Since in the event of an immediately subsequent heat treatment or a pressure load immediately starting the needling process at the exit of the needle machine until the heat treatment, the finish only has to avoid springing back of the rock wool fibers, in this case relatively thick stone fibers can reach the upper limit of 6 µm as well as minimum aviva content at the lower limit of 0.05%.

Bei Bedarf kann im Anschluß an die Wärmebehandlung gemäß Anspruch 6 eine Behandlung der Nadelfilzbahn mit einem üblichen Staubbindemittel erfolgen, um bei der weiteren Handhabung Staubanfall zu minimieren.If necessary, after the heat treatment according to claim 6, the needle felt web can be treated with a conventional dust-binding agent in order to minimize dust accumulation during further handling.

Die Ansprüche 7 bis 9 geben besonders bevorzugte Aviva­ gemittel an. Ein Avivagemittel gemäß Anspruch 8 steht auf dem Markt unter der Bezeichnung "Präparol", und ein solches gemäß Anspruch 9 unter der Bezeichnung "Kom­pressol" zur Verfügung. Diese Mittel haben eine Visko­sität zwischen 5.000 cP und 7.000 cP, während sonstige Staubbindemittel, Schlichten oder ähnliche in der Tex­tilindustrie eingesetzte Stoffe eine Viskosität von le­diglich eingen hundert cP besitzen. "Präparol" oder "Kompressol" werden in Wasser emulgiert, und diese Elmusion mit einem Wasseranteil von etwa 90 % kann im Fallschacht unterhalb des Zerfaserungsagregats auf die Fasern aufgedüst und so gleichmäßig verteilt eingebracht werden. Ausgezeichnete Ergebnisse haben sich mit einer Verwendung diese Avivagemittel in einer Menge von 0,02 bis 0,8 Gewichtsprozent, bezogen auf das Trockengewicht der Steinwollebahn, ergeben.Claims 7 to 9 give particularly preferred Aviva average. A softening agent according to claim 8 is available on the market under the name "preparol", and one according to claim 9 is available under the name "compressol". These agents have a viscosity between 5,000 cP and 7,000 cP, while other dust-binding agents, sizes or similar substances used in the textile industry have a viscosity of only a few hundred cP. "Preparol" or "compressol" are emulsified in water, and this elmusion with a water content of about 90% can be sprayed onto the fibers in the chute below the fiberizing unit and thus introduced evenly distributed. Excellent results have been obtained using these softening agents in an amount of 0.02 to 0.8 percent by weight, based on the dry weight of the rock wool web.

Claims (9)

1. Verfahren zur Herstellung von Nadelfilz aus Stein­wolle,
bei dem Steinschmelze wie Basalt, Diabas etc. zer­fasert und auf einem Band unter Bildung einer Filz­bahn abgelegt wird, und
bei dem die Filzbahn auf einen Bruchteil ihrer ur­sprünglichen Dicke verdichtet und einem Nadelvorgang unterzogen wird, wobei die Steinfasern zur Verbes­serung ihrer Geschmeidigkeit mit einer Avivage ver­sehen sind,
dadurch gekennzeichnet,
daß die Steinfasern in der Filzbahn mit geringem Durchmesser, zweckmäßig mit einem Maximum der Häu­figkeitsverteilung der Faserdicke unter 6 um erzeugt werden,
daß als Avivage ein Mittel mit einer hohen Viskosi­tät insbesondere zwischen 2000 und 10000 cP, vor­zugsweise zwischen 3000 und 7000 cP verwendet wird, und
daß die Avivage insbesondere mit einer Mindestmenge von 0,05, vorzugsweise 0,4-0,8 und einer Höchstmenge von 5 Gewichtsprozent des Mittels bezogen auf das Gewicht der trockenen Filzbahn zugesetzt wird.1. Process for the production of needle felt from rock wool,
where the stone melt such as basalt, diabase, etc. is defibrated and placed on a belt to form a felt web, and
in which the felt web is compacted to a fraction of its original thickness and subjected to a needle process, the stone fibers being provided with a finishing agent to improve their suppleness,
characterized,
that the stone fibers are produced in the felt web with a small diameter, expediently with a maximum of the frequency distribution of the fiber thickness below 6 μm,
that an agent with a high viscosity, in particular between 2000 and 10000 cP, preferably between 3000 and 7000 cP, is used as finishing agent, and
that the finishing agent is added in particular with a minimum amount of 0.05, preferably 0.4-0.8 and a maximum amount of 5 percent by weight of the agent, based on the weight of the dry felt web. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Filzbahn eine derartige Bahn (ohne Avivage) verwendet wird, die gemäß der Prüfmethode nach Renault mit einem freien Ringspalt von 5 mm einer Durchstoßkraft von mindestens 80 N, vorzugsweise 150 - 200 N, widersteht.2. The method according to claim 1, characterized in that such a web (without finishing) is used as a felt web which, according to the Renault test method with a free annular gap of 5 mm, withstands a puncture force of at least 80 N, preferably 150-200 N . 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß für die Filzbahn eine derartige Avivage verwen­det wird, daß diese gemäß der Prüfmethode nach Renault mit einem freien ringspalt von 5 mm einer Durchstoßkraft von mindestens 100 N, vorzugsweise 200 - 500 N, widersteht.3. The method according to claim 1, characterized in that such finishing is used for the felt web that it withstands a puncture force of at least 100 N, preferably 200-500 N, according to the Renault test method with a free annular gap of 5 mm. 4. Verfahren nach einem der Ansprüche 1-3, dadurch ge­kennzeichnet, daß die genadelte Filzbahn alsbald mit einer Wärme- behandlung bei einer Temperatur zwi­schen etwa 300°C und 500°C spannungsfrei gemacht wird.4. The method according to any one of claims 1-3, characterized in that the needled felt web is immediately made stress-free with a heat treatment at a temperature between about 300 ° C and 500 ° C. 5. Verfahren nach Anspruch 4, dadurch gekennzeichnete daß auf die genadelte Filzbahn bevorzugt unmittelbar anschließend an den Nadelungsvorgang Druck aufge­bracht wird.5. The method according to claim 4, characterized in that pressure is applied to the needled felt web preferably immediately after the needling process. 6. Verfahren nach Anspruch 4 oder 5, dadurch gekenn­zeichnet, daß der wärmebehandelten Filzbahn ein Staubbindemittel zugesetzt wird.6. The method according to claim 4 or 5, characterized in that a dust binder is added to the heat-treated felt web. 7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Avivage ein Mittel auf Mineralölbasis ver­wendet wird.7. The method according to claim 1, characterized in that a mineral oil-based agent is used as a finish. 8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß als Mittel eine mineralölhaltige Zubereitung von Alkylphenolpolyglykolethern verwendet wird, die be­zogen auf den Mineralölanteil vorzugsweise etwa 15 % an polyzyklischen Aromaten enthält.8. The method according to claim 7, characterized in that a mineral oil-containing preparation of Alkylphenol polyglycol ethers is used, which preferably contains about 15% of polycyclic aromatics based on the mineral oil content. 9. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß als Avivage eine Mischung eines aus der Naph­tenfraktion stammenden Mineralöls mit vorzugsweise etwa 20 % überwiegend nichtionischem Emulgator ver­wendet wird.9. The method according to claim 7, characterized in that a mixture of a mineral oil originating from the naphthen fraction and preferably about 20% predominantly nonionic emulsifier is used as the finishing agent.
EP89117542A 1988-10-13 1989-09-22 Method for making a needled felt from slag wool Expired - Lifetime EP0363707B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89117542T ATE92548T1 (en) 1988-10-13 1989-09-22 PROCESS FOR MAKING NEEDLE FELT FROM ROCK WOOL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3835007 1988-10-13
DE3835007A DE3835007A1 (en) 1988-10-13 1988-10-13 METHOD FOR PRODUCING NEEDLE FELT FROM STONE WOOL

Publications (3)

Publication Number Publication Date
EP0363707A2 true EP0363707A2 (en) 1990-04-18
EP0363707A3 EP0363707A3 (en) 1990-09-05
EP0363707B1 EP0363707B1 (en) 1993-08-04

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EP89117542A Expired - Lifetime EP0363707B1 (en) 1988-10-13 1989-09-22 Method for making a needled felt from slag wool

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US (1) US5057173A (en)
EP (1) EP0363707B1 (en)
JP (1) JPH02153852A (en)
AT (1) ATE92548T1 (en)
DE (2) DE3835007A1 (en)
DK (1) DK465389A (en)
ES (1) ES2044004T3 (en)
FI (1) FI94966B (en)
YU (1) YU46492B (en)
ZA (1) ZA897769B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0464400A1 (en) * 1990-07-02 1992-01-08 Polyfelt Gesellschaft m.b.H. Method for making needled nonwoven fabrics
WO1993015246A1 (en) * 1992-01-24 1993-08-05 Isover Saint-Gobain An agent as a processing aid, a mineral wool needle-felt, a crimped mineral wool product, and methods for producing them
EP0819788A2 (en) * 1996-07-15 1998-01-21 Isover Saint-Gobain Needling aid for producing needle felts, a needle felt produced by using it, and a method for production thereof
DE102016202401A1 (en) 2016-02-17 2017-08-17 Saint-Gobain Isover G+H Ag Needle aid for the production of needle felt made of mineral wool and needle felt made therewith
WO2024078997A1 (en) 2022-10-13 2024-04-18 Saint-Gobain Isover Needle felt and use of a fatty acid amide amine in the production of a needle felt

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DE4212842C2 (en) * 1992-04-16 1995-09-07 Gruenzweig & Hartmann Needle felt with cover layer and process for its production
US6311375B1 (en) 2000-07-27 2001-11-06 Gilbert Patrick Method of needle punching yarns
US6796115B1 (en) 2001-12-19 2004-09-28 Gilbert Patrick Needle punched yarns
US8806900B2 (en) * 2005-04-04 2014-08-19 Reforcetech As Ceramic bushing/s consisting local heating/s integrated in apparatus for manufacturing mineral/basalt fibers
DE102015212417B4 (en) 2015-07-02 2020-02-20 Sgl Carbon Se Use of thin carbon fiber fleeces produced by a horizontal splitting process
ITUA20164647A1 (en) * 2016-06-24 2017-12-24 Eurofibre Spa ANGLING ASSIST TO BE USED IN THE PRODUCTION OF FERTILIZED FELT IN MINERAL WOOL AND A METHOD FOR REALIZING FELT AGUGLIATI
GB201615896D0 (en) * 2016-09-19 2016-11-02 Knauf Insulation Doo Skofja Loka Mineral wool insulation
CN109267432A (en) * 2018-09-18 2019-01-25 西安工程大学 A kind of basalt fibre wet method felt and its processing method
CN114645381B (en) * 2022-03-10 2023-05-26 青岛青力环保设备有限公司 Dehydration and drying integrated equipment for producing soundproof rock cotton felt

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DE1122666B (en) * 1960-11-19 1962-01-25 Zschimmer & Schwarz Process for the preparation and melting of textile fibers
DE2232785A1 (en) * 1972-07-04 1973-10-31 Bayerische Wollfilzfabriken Kg Needled felting - of combined mineral and ceramic fibres with lubricant impregnation
FR2349353A1 (en) * 1976-04-27 1977-11-25 Huyck Corp FILTERING TABLES FOR HIGH TEMPERATURES AND METHOD FOR MANUFACTURING SUCH FABRICS
GB2123452A (en) * 1982-07-12 1984-02-01 Didier Werke Ag Manufacturing needled mineral fibre blankets

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US2707690A (en) * 1951-04-10 1955-05-03 Owens Corning Fiberglass Corp Method and apparatus for applying liquid materials to fibers
US3331669A (en) * 1963-06-21 1967-07-18 Johns Manville Method and apparatus for forming mineral wool products
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DE1073682B (en) * 1960-01-21 Chemische Fabrik Stockhausen a Cie Krefeld Larding staple fibers
DE1122666B (en) * 1960-11-19 1962-01-25 Zschimmer & Schwarz Process for the preparation and melting of textile fibers
DE2232785A1 (en) * 1972-07-04 1973-10-31 Bayerische Wollfilzfabriken Kg Needled felting - of combined mineral and ceramic fibres with lubricant impregnation
FR2349353A1 (en) * 1976-04-27 1977-11-25 Huyck Corp FILTERING TABLES FOR HIGH TEMPERATURES AND METHOD FOR MANUFACTURING SUCH FABRICS
GB2123452A (en) * 1982-07-12 1984-02-01 Didier Werke Ag Manufacturing needled mineral fibre blankets

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0464400A1 (en) * 1990-07-02 1992-01-08 Polyfelt Gesellschaft m.b.H. Method for making needled nonwoven fabrics
AT394216B (en) * 1990-07-02 1992-02-25 Polyfelt Gmbh METHOD FOR THE PRODUCTION OF NEEDLED SPINNING PLANTS
US5213735A (en) * 1990-07-02 1993-05-25 Polyfelt Gesellschaft M.B.H. Process for manufacturing needled spunbondeds
WO1993015246A1 (en) * 1992-01-24 1993-08-05 Isover Saint-Gobain An agent as a processing aid, a mineral wool needle-felt, a crimped mineral wool product, and methods for producing them
EP0819788A2 (en) * 1996-07-15 1998-01-21 Isover Saint-Gobain Needling aid for producing needle felts, a needle felt produced by using it, and a method for production thereof
EP0819788A3 (en) * 1996-07-15 2000-02-02 Isover Saint-Gobain Needling aid for producing needle felts, a needle felt produced by using it, and a method for production thereof
DE102016202401A1 (en) 2016-02-17 2017-08-17 Saint-Gobain Isover G+H Ag Needle aid for the production of needle felt made of mineral wool and needle felt made therewith
EP3208246A1 (en) 2016-02-17 2017-08-23 Saint-Gobain Isover Needling additive for the manufacture of needle felts of mineral wool and needle felt manufactured therewith
WO2024078997A1 (en) 2022-10-13 2024-04-18 Saint-Gobain Isover Needle felt and use of a fatty acid amide amine in the production of a needle felt
DE102022126757A1 (en) 2022-10-13 2024-04-18 Saint-Gobain Isover G+H Aktiengesellschaft Needle felt and use of a fatty acid amide amine in the manufacture of a needle felt

Also Published As

Publication number Publication date
DE58905136D1 (en) 1993-09-09
YU46492B (en) 1993-10-20
DE3835007A1 (en) 1990-04-19
FI94966B (en) 1995-08-15
EP0363707A3 (en) 1990-09-05
ATE92548T1 (en) 1993-08-15
ES2044004T3 (en) 1994-01-01
ZA897769B (en) 1990-08-29
EP0363707B1 (en) 1993-08-04
YU184689A (en) 1990-12-31
DK465389D0 (en) 1989-09-21
US5057173A (en) 1991-10-15
JPH02153852A (en) 1990-06-13
DK465389A (en) 1990-04-14
FI894871A0 (en) 1989-10-13

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