EP1566476B1 - dimensinnally stable web for roofing membranes - Google Patents

dimensinnally stable web for roofing membranes Download PDF

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Publication number
EP1566476B1
EP1566476B1 EP20040003571 EP04003571A EP1566476B1 EP 1566476 B1 EP1566476 B1 EP 1566476B1 EP 20040003571 EP20040003571 EP 20040003571 EP 04003571 A EP04003571 A EP 04003571A EP 1566476 B1 EP1566476 B1 EP 1566476B1
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EP
European Patent Office
Prior art keywords
woven
intermediate layer
shrinkage force
bonded
roofing
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.)
Expired - Lifetime
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EP20040003571
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German (de)
French (fr)
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EP1566476A1 (en
Inventor
Wolfgang Greiser
Bertrand Weiter
Roger Souther
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Johns Manville Europe GmbH
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Johns Manville Europe GmbH
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Publication date
Application filed by Johns Manville Europe GmbH filed Critical Johns Manville Europe GmbH
Priority to AT04003571T priority Critical patent/ATE415510T1/en
Priority to EP20040003571 priority patent/EP1566476B1/en
Priority to DK04003571T priority patent/DK1566476T3/en
Priority to DE200450008524 priority patent/DE502004008524D1/en
Priority to US10/577,889 priority patent/US7811950B2/en
Priority to PCT/IB2004/003515 priority patent/WO2005042823A2/en
Publication of EP1566476A1 publication Critical patent/EP1566476A1/en
Application granted granted Critical
Publication of EP1566476B1 publication Critical patent/EP1566476B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/12—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with filaments or yarns secured together by chemical or thermo-activatable bonding agents, e.g. adhesives, applied or incorporated in liquid or solid form
    • 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
    • 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
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/009—Condensation or reaction polymers
    • D04H3/011—Polyesters
    • 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
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • 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
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/105—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by needling
    • 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
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
    • 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
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
    • 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
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
    • 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
    • D06N5/00—Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/10—Roof covering by making use of flexible material, e.g. supplied in roll form by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2213—Coating or impregnation is specified as weather proof, water vapor resistant, or moisture resistant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/681—Spun-bonded nonwoven fabric
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/682—Needled nonwoven fabric
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/689—Hydroentangled nonwoven fabric

Definitions

  • the invention relates to a liner based on a polyester fleece, which can be processed as such or in combination with other fabrics to a bitumen roofing membrane or geomembrane, a process for their preparation and made therefrom intermediate or end products namely composites and bitumen roofing membranes and geomembranes.
  • Inserts for bitumen roofing membranes or geomembranes generally consist of a textile fabric such. As a consolidated nonwoven fabric of synthetic fibers, usually in conjunction with one or more layers of other or even the same fabrics.
  • roofing membrane or geomembrane has a considerable weight, which is often in the order of 2.5 to 6 kilos / m 2 .
  • reinforced inserts not only have a number of technical disadvantages, but are also more expensive and complicated to manufacture.
  • improved deposits which are particularly suitable for bitumen roofing or waterproofing membranes, as well as improved processes for their preparation, which do not have disadvantages mentioned above or only to a reduced extent.
  • the object of the invention is therefore to provide an insert which does not have the abovementioned disadvantages and which is particularly suitable for the production of roofing and waterproofing membranes, which is free from reinforcements, is simple and economical to produce and which leads to end products which have high thermal dimensional stability.
  • a liner which is suitable as a liner for roofing and waterproofing membranes, comprising a reinforcement-free, solidified polyester filament non-woven, which is bonded with a binder and has a latent shrinking force, which the delay forces in the subsequent, in the heat counteracts occurring in the manufacture of composites, wherein the shrinkage force is 2N / 5cm - 20N / 5cm.
  • the nonwoven is mechanically consolidated by needling.
  • the shrinkage force is equal to the sum of the drafting forces.
  • An advantageous range for the shrinkage force is 6 N / 5 cm to 10.
  • the shrinkage force may also have higher or lower values if necessary.
  • the fleece of a polyethylene terephthalate filament fleece is preferred.
  • Another object of the invention is a process for producing a non-reinforcing polyester filament nonwoven insert which is suitable as a liner for roofing and waterproofing membranes, which is characterized in that by the spunbond process produces a polyester filament nonwoven, solidifies the resulting nonwoven fabric, provides a binder, dried in a dryer and stretched in a downstream of the dryer drafting device to an extent that the nonwoven fabric has a shrinking force, which counteracts the delay forces that occur in the subsequent, taking place in the heat treatments.
  • the shrinkage force is equal to the delay forces.
  • An advantageous range for the shrinkage force is 6N / 5 cm to 10N / 5 cm.
  • a polyethylene terephthalate filament nonwoven fabric is used.
  • the needled web can also be consolidated with a calender with an embossing calender, especially with heated calenders.
  • the basis weight of the fleece is within the usual range and can be varied depending on the application.
  • customary binders are used, preferably in the form of 5-25% strength aqueous dispersions.
  • the fleece provided with the binder is then dried.
  • a drafting system in which the nonwoven is stretched, namely at a temperature which is still above the crystallization temperature of the polyester used.
  • the temperature of the nonwovens should therefore not fall below this temperature before the shrinkage force is built up, preferably this temperature is 130 ° - 140 ° C.
  • the amount of draft in the drafting equipment depends on the desired latent shrinkage force that is to be built up. This can be adjusted individually to the wishes of the customer.
  • the nonwoven fabric is given a shrinking force which remains latent in the nonwoven and is released again when the nonwoven insert is subjected to heat during further processing operations. Then this shrinking force counteracts the delay forces and lifts them completely or at least largely. Such delay forces occur z.
  • the fleece is pulled through a hot Bitumenbad or when the still hot bituminATOR fleece on further transport has the opportunity to sag. The own weight exerts a delay force.
  • roofing membranes can, for. B. done by mechanical attachment in the cold state. Of importance, however, is laying according to the welding process.
  • the size of the shrinking forces which is to be imparted to the nonwoven according to the invention, can be determined in a simple manner by a few preliminary tests; it is the sum of the stretching forces acting on the insert until the final product is finished. In this way it is possible to produce a tailor-made product according to the wishes of the end user.
  • the inserts according to the invention can be produced simply and economically. They are because of the elimination of reinforcements such as glass fibers, glass mesh fabrics or glass shelves particularly cost-effective.

Abstract

A ply of polyester non-woven, which has been consolidated but contains no other reinforcement, has a latent shrinkage force of 2 to 20 N/5 cm to oppose stretching or other deformation during subsequent operations involving heat, e.g. coating with PVC or bitumen or welding into position. Consolidation can be by mechanical or hydrodynamic needle punching or thermal bonding. An independent claim is also included for the process of making such a non-woven from spun-bonded polyester filament non-woven by applying a binder, drying and then drawing above the crystallization temperature, e.g. above 130 to 140 [deg]C. The latent retraction force is tailored to suit the deformation forces likely to be subsequently encountered.

Description

Die Erfindung betrifft eine Einlage auf Basis eines Polyestervlieses, die als solche oder im Verbund mit anderen Flächengebilden zu einer bituminierten Dachbahn oder Dichtungsbahn verarbeitet werden kann, ein Verfahren zu deren Herstellung und daraus hergestellte Zwischen- oder Endprodukte nämlich Verbundstoffe und bituminierte Dachbahnen und Dichtungsbahnen.The invention relates to a liner based on a polyester fleece, which can be processed as such or in combination with other fabrics to a bitumen roofing membrane or geomembrane, a process for their preparation and made therefrom intermediate or end products namely composites and bitumen roofing membranes and geomembranes.

Einlagen für bituminierte Dachbahnen oder Dichtungsbahnen bestehen im Allgemeinen aus einem textilen Flächengebilde wie z. B. einem verfestigten Vlies aus synthetischen Fasern, meistens im Verbund mit einer oder mehreren Lagen von anderen oder auch gleichen Flächengebilden.Inserts for bitumen roofing membranes or geomembranes generally consist of a textile fabric such. As a consolidated nonwoven fabric of synthetic fibers, usually in conjunction with one or more layers of other or even the same fabrics.

Diese Einlagen werden bituminiert, oft auf einer Seite mit Schiefer oder mit einer Folie versehen. Das so erhaltene Endprodukt, d. h. die Dachbahn oder auch Dichtungsbahn hat ein beträchtliches Eigengewicht, das häufig in der Größenordnung von 2,5 bis 6 Kilo/m2 liegt.These deposits are bituminised, often on one side with slate or provided with a foil. The resulting end product, ie the roofing membrane or geomembrane has a considerable weight, which is often in the order of 2.5 to 6 kilos / m 2 .

Während der weiteren Verarbeitung, die häufig bei Temperaturen bis zu ca. 200° C stattfinden, wirken auf die Einlagen die verschiedensten Kräfte ein, so z. B. Zugkräfte, wenn die Einlage durch ein Bitumenbad geleitet und wieder aus diesem Bad herausgezogen wird. Dabei längt sich die Einlage.During further processing, which often take place at temperatures up to about 200 ° C, act on the deposits a variety of forces, such. B. tensile forces when the insert passed through a bitumen bath and pulled out of this bath again. The insert lengthens.

Ferner treten Kräfte auf, die auf die Bahn einwirken, wenn diese unter der eigenen Last, z. B. beim Transport von einer Vorrichtung zur anderen Vorrichtung, durchhängen kann. Auch hier tritt eine Längung auf. Diese und auch andere Kräfte bewirken also eine Verformung der Einlage, d. h. einen Verzug, und in der Einlage baut sich eine latente Spannung auf, die beim nächsten Behandlungsschritt, bei dem eine Erwärmung im spannungsarmen oder spannungslosen Zustand stattfindet, freigesetzt wird und zu einem Schrumpfen der Einlage führt.Furthermore, forces occur, which act on the web when it is under its own load, for. B. during transport from one device to another device, sag. Again, a lengthening occurs. This and other forces thus cause a deformation of the insert, ie a delay, and in the insert, a latent tension builds up, which is released in the next treatment step, in which a warming takes place in a low-voltage or de-energized state, and shrinking the Deposit leads.

Besonders nachteilig ist dies z. B. beim Verlegen der Dachbahn, wenn mit Hitze gearbeitet wird. Die Bahn holt sich mehr oder weniger den Verzug zurück, schrumpft und läuft dabei ein. Es ist aber auch möglich, dass die bereits verlegte Bahn z. B. durch Sonneneinstrahlung und die damit verbundene Temperaturerhöhung zu schrumpfen beginnt. Dabei kommt es zur Bildung von Unebenheiten wie Wellenbildung. Und wenn die Bahnen nicht oder nicht genügend überlappend verlegt wurden, kommt es zu Undichtigkeiten, da durch den Schrumpf freiliegende Stellen bei der Dachbedeckung entstehen können, durch die Feuchtigkeit, Staub und dergleichen durchdringen kann.This is particularly disadvantageous z. B. when laying the roofing membrane when working with heat. The train gets more or less the delay back, shrinks and enters it. But it is also possible that the already laid train z. B. by sunlight and the associated increase in temperature begins to shrink. This leads to the formation of bumps such as wave formation. And if the tracks were not laid or not enough overlapping, it comes to leaks, since the shrinkage exposed areas in the roof covering can be caused by the moisture, dust and the like can penetrate.

Ferner kann, auch wenn es beim Schrumpfen nicht zu freiliegenden Stellen kommt, da die Überlappung an sich genügend bemessen war, zu Problemen kommen, da beim Schrumpf die zurückweichende Bahn die Schieferabdeckung der darunter liegenden Stellen entfernt, quasi abzieht. Dies bringt mit, dass die vom Schiefer entblößten Stellen den Witterungsbedingungen schutzlos ausgesetzt sind, wodurch eine vorzeitige oder schnelle Alterung stattfindet, die zu einer vorzeitigen Versprödung führt, wodurch wieder Stellen entstehen, durch die Staub und insbesondere Feuchtigkeit eindringen können.Furthermore, even if shrinkage does not result in exposed areas, since the overlap itself was adequately sized, problems may arise as shrinkage of the receding web removes the slate coverage of the underlying sites, as it were. This implies that the exposed areas of the slate are exposed to the weather conditions, which leads to premature or rapid aging, which leads to premature embrittlement, which again creates places through which dust and moisture in particular can penetrate.

Man hat zwar versucht, die Dimensionsstabilität der Einlagen und auch der bituminierten Dach- oder Dichtungsbahnen zu verbessern, indem man die Einlagen mit Fäden, Gelegen, Gittergeweben u. dgl. insbesondere durch Einlegen von Glasgelegen oder Längsfäden aus Glas verstärkt. Derartige Flächengebilde werden z. B. in der EP 0 572 891 B1 beschrieben.Although it has been attempted to improve the dimensional stability of the deposits and also the bitumen roofing or geomembrane by the deposits with threads, layers, mesh fabrics u. Like. Reinforced in particular by inserting Glasgelegen or longitudinal threads of glass. Such fabrics are z. B. in the EP 0 572 891 B1 described.

Diese Maßnahmen verkomplizieren jedoch die Herstellung der Einlagen durch ein oder mehrere weitere Verfahrensschritte. Zudem müssen die Verstärkungen separat hergestellt werden, oft in komplizierten und teuren Verfahrensschritten. Auch kann die Dimensionsstabilität durch den Einbau von Verstärkungen in vielen Fällen nicht zur vollständigen Zufriedenheit garantiert werden.However, these measures complicate the manufacture of the inserts by one or more further process steps. In addition, the reinforcements must be made separately, often in complicated and expensive process steps. Also, the dimensional stability through the incorporation of reinforcements can not be guaranteed in many cases to complete satisfaction.

So kann es z. B. geschehen, dass bei Verstärkung mit Glasfäden durch Ausfall von einzelnen Fäden oder durch Reißen von Fäden Stellen entstehen, die nicht oder weniger gut verstärkt sind, so dass es bei Zugbeanspruchung an diesen Stellen zu Wellenbildungen kommen kann.So it may be z. Example happen that arise in reinforcement with glass fibers by failure of individual threads or by tearing of threads places that are not or less well reinforced, so that it can come under tensile stress at these points to form waves.

Bei solchen Verfahren besteht die Gefahr, dass reproduzierbar Produkte mit gleichbleibender, guter Qualität nur schwer über längere Zeit hergestellt werden können und häufig Ausschussware anfällt.In such processes, there is the danger that reproducible products with consistent, good quality can be produced only with difficulty over a long period of time and that rejects are frequently produced.

Deshalb weisen verstärkte Einlagen nicht nur eine ganze Reihe von technischen Nachteilen auf, sondern sind auch kostspieliger und auf komplizierte Weise herzustellen. Es besteht somit noch ein Bedürfnis nach verbesserten Einlagen, die insbesondere für bituminierte Dach- oder Dichtungsbahnen geeignet sind, sowie verbesserten Verfahren zu deren Herstellung, welche vorstehend erwähnte Nachteile nicht oder nur in verringertem Maße aufweisen.Therefore, reinforced inserts not only have a number of technical disadvantages, but are also more expensive and complicated to manufacture. Thus, there is still a need for improved deposits, which are particularly suitable for bitumen roofing or waterproofing membranes, as well as improved processes for their preparation, which do not have disadvantages mentioned above or only to a reduced extent.

Aufgabe der Erfindung ist es deshalb, eine Einlage zur Verfügung zu stellen, die oben genannte Nachteile nicht aufweist und die insbesondere für die Herstellung von Dach- und Dichtungsbahnen geeignet ist, die frei von Verstärkungen ist, einfach und wirtschaftlich herzustellen ist und die zu Endprodukten führt, die eine hohe thermische Dimensionsstabilität aufweisen.The object of the invention is therefore to provide an insert which does not have the abovementioned disadvantages and which is particularly suitable for the production of roofing and waterproofing membranes, which is free from reinforcements, is simple and economical to produce and which leads to end products which have high thermal dimensional stability.

Diese Aufgabe wird gelöst durch eine Einlage, welche als Einlage für Dach- und Dichtungsbahnen geeignet ist, umfassend ein verstärkungsfreies, verfestigtes Polyesterfilamentvlies, welches mit einem Bindemittel gebunden ist und eine latente Schrumpfkraft aufweist, welche den Verzugskräften, die bei den nachfolgenden, in der Wärme stattfindenden Behandlungen bei der Herstellung von Verbundstoffen auftreten, entgegenwirkt, wobei die Schrumpfkraft 2N/5cm - 20N/5cm beträgt.This object is achieved by a liner which is suitable as a liner for roofing and waterproofing membranes, comprising a reinforcement-free, solidified polyester filament non-woven, which is bonded with a binder and has a latent shrinking force, which the delay forces in the subsequent, in the heat counteracts occurring in the manufacture of composites, wherein the shrinkage force is 2N / 5cm - 20N / 5cm.

Bevorzugt ist das Vlies mechanisch mittels Nadeln verfestigt.Preferably, the nonwoven is mechanically consolidated by needling.

Sehr geeignet sind auch hydrodynamisch oder thermisch verfestigte Vliese.Also very suitable are hydrodynamically or thermally consolidated nonwovens.

Bevorzugt ist die Schrumpfkraft gleich der Summe der Verzugskräfte. Ein vorteilhafter Bereich für die Schrumpfkraft ist , 6 N / 5 cm bis 10 . Die Schrumpfkraft kann aber auch gegebenenfalls höhere oder niedrigere Werte aufweisen.Preferably, the shrinkage force is equal to the sum of the drafting forces. An advantageous range for the shrinkage force is 6 N / 5 cm to 10. However, the shrinkage force may also have higher or lower values if necessary.

Bevorzugt ist das Vlies eines Polyethylenterephthalatfilamentvlieses.The fleece of a polyethylene terephthalate filament fleece is preferred.

Ein weiterer Gegenstand der Erfindung ist ein Verfahren zur Herstellung einer verstärkungsfreien Polyesterfilamentvlieseinlage, welche als Einlage für Dachund Dichtungsbahnen geeignet ist, das dadurch gekennzeichnet ist, dass man nach dem Spunbond-Verfahren ein Polyesterfilamentvlies herstellt, das so erhaltene Vlies verfestigt, mit einem Binder versieht, in einem Trockner trocknet und in einem dem Trockner nachgeordneten Streckwerk in einem Maße verstreckt, dass das Vlies eine Schrumpfkraft aufweist, welche den Verzugskräften, die bei den nachfolgenden, in der Wärme stattfindenden Behandlungen auftreten, entgegenwirkt.Another object of the invention is a process for producing a non-reinforcing polyester filament nonwoven insert which is suitable as a liner for roofing and waterproofing membranes, which is characterized in that by the spunbond process produces a polyester filament nonwoven, solidifies the resulting nonwoven fabric, provides a binder, dried in a dryer and stretched in a downstream of the dryer drafting device to an extent that the nonwoven fabric has a shrinking force, which counteracts the delay forces that occur in the subsequent, taking place in the heat treatments.

Bevorzugt ist die Schrumpfkraft gleich den Verzugskräften. Ein vorteilhafter Bereich für die Schrumpfkraft ist 6N/5 cm bis 10N/5 cm.Preferably, the shrinkage force is equal to the delay forces. An advantageous range for the shrinkage force is 6N / 5 cm to 10N / 5 cm.

Bevorzugt wird ein Polyethylenterephthalatfilamentvlies verwendet.Preferably, a polyethylene terephthalate filament nonwoven fabric is used.

Es ist vorteilhaft, das Vlies mehrfach zu vernadeln, insbesondere 2- oder 3-fach.It is advantageous to needlepunch the fleece several times, in particular 2 or 3 times.

Das genadelte Vlies kann auch mit einem Kalander mit einem Prägekalander verfestigt werden, insbesondere mit beheizten Kalandern.The needled web can also be consolidated with a calender with an embossing calender, especially with heated calenders.

Weitere Gegenstände der Erfindung sind Verbundstoffe, Dachbahnen und Dichtungsbahnen, welche vorstehend beschriebene Einlagen enthalten.Further objects of the invention are composites, roofing membranes and geomembranes containing deposits described above.

Das Flächengewicht des Vlieses liegt innerhalb des üblichen Bereichs und kann je nach Einsatzzweck variiert werden. Zum Binden der Vliese werden übliche Binder verwendet, vorzugsweise in Form von 5 - 25 %-tiger wässrigen Dispersionen.The basis weight of the fleece is within the usual range and can be varied depending on the application. For bonding the nonwovens, customary binders are used, preferably in the form of 5-25% strength aqueous dispersions.

Das mit dem Binder versehene Vlies wird anschließend getrocknet. Dem Trocknen direkt nachgeordnet ist ein Streckwerk, in dem das Vlies verstreckt wird, und zwar bei einer Temperatur, die noch über der Kristallisationstemperatur des verwendeten Polyesters liegt. Die Temperatur der Vliese soll also nicht unterhalb dieser Temperatur fallen, bevor die Schrumpfkraft aufgebaut wird, vorzugsweise ist diese Temperatur 130° - 140° C.The fleece provided with the binder is then dried. Directly downstream of the drying is a drafting system, in which the nonwoven is stretched, namely at a temperature which is still above the crystallization temperature of the polyester used. The temperature of the nonwovens should therefore not fall below this temperature before the shrinkage force is built up, preferably this temperature is 130 ° - 140 ° C.

Das Ausmaß der Verstreckung im Streckwerk hängt ab von der gewünschten latenten Schrumpfkraft, die aufgebaut werden soll. Diese kann individuell auf die Wünsche des Kunden eingestellt werden.The amount of draft in the drafting equipment depends on the desired latent shrinkage force that is to be built up. This can be adjusted individually to the wishes of the customer.

Durch das Verstrecken im Streckwerk gemäß der Erfindung wird dem Vlies eine Schrumpfkraft verliehen, die latent im Vlies verbleibt und wieder ausgelöst wird, wenn die Vlieseinlage bei weiteren Verarbeitungsvorgängen in der Wärme belastet wird. Dann wirkt diese Schrumpfkraft den Verzugskräften entgegen und hebt sie ganz oder zumindest weitgehend auf. Solche Verzugskräfte treten z. B. auf, wenn das Vlies durch ein heißes Bitumenbad gezogen wird oder wenn das noch heiße bituminierte Vlies beim Weiterbefördern die Möglichkeit hat, durchzuhängen. Dabei übt das eigene Gewicht eine Verzugskraft aus.By stretching in the drafting system according to the invention, the nonwoven fabric is given a shrinking force which remains latent in the nonwoven and is released again when the nonwoven insert is subjected to heat during further processing operations. Then this shrinking force counteracts the delay forces and lifts them completely or at least largely. Such delay forces occur z. Example, when the fleece is pulled through a hot Bitumenbad or when the still hot bituminierte fleece on further transport has the opportunity to sag. The own weight exerts a delay force.

Das Verlegen von Dachbahnen kann z. B. durch mechanische Befestigung im kalten Zustand geschehen. Von Bedeutung aber ist auch das Verlegen nach dem Schwei ßverfahren.The laying of roofing membranes can, for. B. done by mechanical attachment in the cold state. Of importance, however, is laying according to the welding process.

Da durch die Erfindung schrumpffreie mit einer Einlage versehene Dachbahnen zugänglich sind, kommt es auch bei Sonneneinstrahlung und der damit verbundenen Erwärmung nicht zu einem Schrumpfen, so dass die anfangs geschilderten Nachteile nicht auftreten, es entstehen somit keine freien Stellen zwischen den Stößen und auch keine Stellen, bei denen die Schieferauflage entfernt ist.Since shrink-free provided with a liner roofing membranes are accessible by the invention, it does not shrink even with sunlight and the associated heating, so that the initially described disadvantages do not occur, there are thus no vacancies between the joints and no places with the slate support removed.

Unter Verbundstoffe im Rahmen der Erfindung sind zu verstehen mehrlagige textile und technische Flächengebilde, derartige Flächengebilde mit Beschichtung, Dach- und Dichtungsbahnen, Bodenbeläge, z. B. solche mit einer PVC-Beschichtung, auch bituminierte Dach- und Dichtungsbahnen und dergleichen.Under composite materials in the context of the invention are to be understood multilayer textile and technical sheet, such fabrics with coating, roofing and waterproofing membranes, floor coverings, z. As those with a PVC coating, and bitumen roofing and waterproofing membranes and the like.

Die Größe der Schrumpfkräfte, welche dem Vlies gemäß der Erfindung verliehen werden soll, lässt sich in einfacher Weise durch wenige Vorversuche ermitteln; sie ergibt sich aus der Summe der Verstreckkräfte, die auf die Einlage bis zur fertigen Herstellung des Endprodukts einwirken. Auf diese Weise ist es möglich, ein maßgeschneidertes Produkt nach Wünschen der Endabnehmer herzustellen.The size of the shrinking forces, which is to be imparted to the nonwoven according to the invention, can be determined in a simple manner by a few preliminary tests; it is the sum of the stretching forces acting on the insert until the final product is finished. In this way it is possible to produce a tailor-made product according to the wishes of the end user.

Die erfindungsgemäßen Einlagen lassen sich einfach und wirtschaftlich herstellen. Sie sind wegen des Wegfalls von Verstärkungen wie insbesondere Glasfäden, Glasgittergeweben oder Glasgelegen besonders kostengünstig.The inserts according to the invention can be produced simply and economically. They are because of the elimination of reinforcements such as glass fibers, glass mesh fabrics or glass shelves particularly cost-effective.

Claims (14)

  1. An intermediate layer which is suitable as an intermediate layer for roofing and sealing membranes, comprising a reinforcement-free, bonded non-woven of polyester filaments which is bound by a binder and which has a latent shrinkage force which counteracts the distortion forces which arise in the subsequent treatment operations during the manufacture of composite materials which take place under heat, the shrinkage force being 2 N/5 cm to 20 N/5 cm.
  2. The intermediate layer according to claim 1, characterized in that the non-woven is bonded mechanically by means of needles.
  3. The intermediate layer according to claim 1 or 2, characterized in that the non-woven is bonded hydrodynamically.
  4. The intermediate layer according to claim 1, characterized in that the non-woven is bonded thermally.
  5. The intermediate layer according to at least one of claims 1 to 4, characterized in that the shrinkage force is equal to the distortion forces.
  6. The intermediate layer according to at least one of claims 1 to 5, characterized in that the shrinkage force is 6 N/5 cm to 10 N/5 cm.
  7. The intermediate layer according to at least one of claims 1 to 6, characterized in that the non-woven is a non-woven of polyethylene terephthalate filaments.
  8. A method for producing a reinforcement-free non-woven intermediate layer of polyester filaments which is suitable as an intermediate layer for roofing and sealing membranes, characterized in that a non-woven of polyester filaments is produced by the spun-bond method, the non-woven obtained in this way is bonded, is provided with a binder, is dried in a dryer and is stretched on a stretching unit positioned downstream of a dryer to an extent such that the non-woven has a shrinkage force which counteracts the distortion forces which arise in the subsequent treatment operations which take place under heat, the shrinkage force being in a range from 2 N/5 cm to 20 N/5 cm.
  9. The method according to claim 8, characterized in that the shrinkage force is equal to the distortion forces.
  10. The method according to claim 8 or 9, characterized in that shrinkage force is in a range from 6 N/5 cm to 10 N/5 cm.
  11. The method according to at least one of claims 9 and 10, characterized in that the non-woven of polyester filaments is a non-woven of polyethylene terephthalate.
  12. The method according to at least one of claims 8 to 12, characterized in that for bonding the non-woven is needle-punched and passed through a calender.
  13. Composite materials containing intermediate layers which are suitable as an intermediate layer for roofing and sealing membranes comprising a reinforcement-free, bonded non-woven of polyester filaments which is bound by a binder and which has a latent shrinkage force which counteracts the distortion forces which arise in the subsequent treatment operations during the manufacture of composite materials which take place under heat, the shrinkage force being 2 N/5 cm to 20 N/5 cm.
  14. Roofing or sealing membranes containing intermediate layers according to any one of claims 1 to 12.
EP20040003571 2003-10-31 2004-02-18 dimensinnally stable web for roofing membranes Expired - Lifetime EP1566476B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT04003571T ATE415510T1 (en) 2004-02-18 2004-02-18 DIMENSIONAL STABLE INSERT SUITABLE FOR ROOFING MEMBERS OR SEALING MESHES
EP20040003571 EP1566476B1 (en) 2004-02-18 2004-02-18 dimensinnally stable web for roofing membranes
DK04003571T DK1566476T3 (en) 2004-02-18 2004-02-18 Dimensionally stable posts for roofing or sealing paths
DE200450008524 DE502004008524D1 (en) 2004-02-18 2004-02-18 Dimensionally stable insert suitable for roofing membranes or waterproofing membranes
US10/577,889 US7811950B2 (en) 2003-10-31 2004-10-25 Dimensionally stable ply suitable for roofing webs or roof-sealing webs
PCT/IB2004/003515 WO2005042823A2 (en) 2003-10-31 2004-10-25 Dimensionally stable ply suitable for roofing webs or roof-sealing webs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20040003571 EP1566476B1 (en) 2004-02-18 2004-02-18 dimensinnally stable web for roofing membranes

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EP1566476A1 EP1566476A1 (en) 2005-08-24
EP1566476B1 true EP1566476B1 (en) 2008-11-26

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EP (1) EP1566476B1 (en)
AT (1) ATE415510T1 (en)
DE (1) DE502004008524D1 (en)
DK (1) DK1566476T3 (en)
WO (1) WO2005042823A2 (en)

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CN103210160A (en) * 2010-11-11 2013-07-17 加拿大圣戈班爱德福思有限公司 Composite reinforcement for roofing membranes
EP3124236A1 (en) 2011-06-17 2017-02-01 Fiberweb, Inc. Vapor permeable, substantially water impermeable multilayer article
WO2012178027A2 (en) 2011-06-23 2012-12-27 Fiberweb, Inc. Vapor-permeable, substantially water-impermeable multilayer article
PL2723568T3 (en) 2011-06-23 2018-01-31 Fiberweb Llc Vapor permeable, substantially water impermeable multilayer article
EP2723567A4 (en) 2011-06-24 2014-12-24 Fiberweb Inc Vapor-permeable, substantially water-impermeable multilayer article
CN102862409B (en) * 2011-07-08 2015-09-30 上海纳尔数码喷印材料股份有限公司 BOPP film covers the single plane fluoroscopy digital printing material and progress method at the end
CN104691078B (en) * 2013-12-05 2017-08-04 上海纳尔数码喷印材料股份有限公司 A kind of preparation method of single plane fluoroscopy PVC milled carbon fiber films
WO2017183997A1 (en) * 2016-04-21 2017-10-26 Toro Malaga, Ana Lucia Method for producing nonwoven textiles

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JPS575957A (en) * 1980-06-13 1982-01-12 Toray Industries Polyester long fiber nonwoven fabric and method
DE3145266C2 (en) * 1981-11-14 1985-08-22 Fa. Carl Freudenberg, 6940 Weinheim Roofing and waterproofing membrane
DE3831271A1 (en) * 1988-09-14 1990-03-15 Hoechst Ag CARRIER RAIL FOR ROOF COVERING
FR2640288B1 (en) * 1988-12-13 1993-06-18 Rhone Poulenc Fibres NON-WOVEN TABLECLOTH SUPPORT IN CHEMICAL TEXTILE AND METHOD OF MANUFACTURING THE SAME
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US6533987B2 (en) * 2000-12-15 2003-03-18 Kimberly-Clark Worldwide, Inc. Methods of making materials having shape-memory

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EP1566476A1 (en) 2005-08-24
WO2005042823A3 (en) 2005-06-16
DK1566476T3 (en) 2009-03-23
WO2005042823A2 (en) 2005-05-12
ATE415510T1 (en) 2008-12-15
US20070190875A1 (en) 2007-08-16
DE502004008524D1 (en) 2009-01-08
US7811950B2 (en) 2010-10-12

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