EP0446822B2 - Support web for roof foundation webs - Google Patents

Support web for roof foundation webs Download PDF

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Publication number
EP0446822B2
EP0446822B2 EP19910103645 EP91103645A EP0446822B2 EP 0446822 B2 EP0446822 B2 EP 0446822B2 EP 19910103645 EP19910103645 EP 19910103645 EP 91103645 A EP91103645 A EP 91103645A EP 0446822 B2 EP0446822 B2 EP 0446822B2
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EP
European Patent Office
Prior art keywords
base felt
spunbonded
filaments
melting point
fusible binder
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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EP19910103645
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German (de)
French (fr)
Other versions
EP0446822B1 (en
EP0446822A1 (en
Inventor
Karl-Christian Zerfass
Franz Kaulich
Michael Schöps
Hans Dr. Wagner
Bertrand Claude Weiter
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Johns Manville
Original Assignee
Hoechst AG
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Publication of EP0446822A1 publication Critical patent/EP0446822A1/en
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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
    • D04H3/005—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
    • 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
    • D04H3/14—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
    • D04H3/153—Mixed yarns or filaments
    • 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
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24826—Spot bonds connect components
    • 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

Definitions

  • the invention relates to a carrier sheet for roofing membranes and one with this carrier sheet manufactured roofing membrane.
  • roofing membranes are known to be under the tiles or slate of steep roofs or the like as protection against flying snow, dust, etc.
  • roofing membranes should on the one hand impermeable to water and, on the other hand, permeable to air and steam. They are also said to be high Have strength, in particular tear resistance, e.g. the weight of the roof covering in the event of an accident to be able to record.
  • roofing membranes made of grid-reinforced foils are widespread. These foils do have one good tear resistance; However, the tear resistance and often also the vapor permeability remain unsatisfactory.
  • From DE-C-34 19 675 is a nonwoven made of polyethylene glycol terephthalate and Polybutylene glycol terephthalate is known to be needled and thermally solidified.
  • EP-PS 0027750 describes a carrier web for a roofing membrane which consists of a nonwoven fabric made of polypropylene, polyethylene, polyester or polyvinyl and has a weight per unit area between 85 and 200 g / m 2 .
  • the nonwoven fabric is provided with a bitumen layer on one side by warmly coating the nonwoven fabric with the bitumen and then cooling it to produce microholes or microcracks.
  • This publication does not reveal anything about the structure of the nonwoven fabric - apart from the fiber material used and the weight per unit area.
  • the invention has for its object to provide a carrier sheet for roofing membranes, the ensures high strength, in particular tear resistance of the roofing membrane and good Dimensional stability even at high processing temperatures.
  • the object of the invention is achieved by a carrier insert according to claim 1 realized.
  • the carrier web is given the structure according to the invention the spunbond nonwoven has good dimensional stability even at high processing temperatures. This is for the production of roofing underlays of importance, in which the carrier sheet with bitumen is provided. Processing temperatures are particularly prevalent when impregnating the carrier sheet with bitumen from 160 to 180 ° C. As has been shown, the carrier web designed according to the invention has good dimensional stability even at these high temperatures, which is important for processing the Carrier web is essential. Carrier sheets made of polypropylene, which is a softening point of approx. 156 ° C, on the other hand, are less suitable, for example, for bituminization.
  • the carrier web for producing a roofing underlay is preferably in Used with bitumen.
  • the carrier web is preferably impregnated with bitumen; instead, the carrier web can also be coated with bitumen, preferably on both sides is coated with bitumen.
  • the carrier web designed according to the invention has a tear resistance in the The order of magnitude from 20 N to 80 N, a nail pull-out strength from 50 N to 180 N and a perforation stability from 400 N to 1200 N.
  • a tear resistance in the The order of magnitude from 20 N to 80 N
  • a nail pull-out strength from 50 N to 180 N
  • a perforation stability from 400 N to 1200 N.
  • bitumen instead of bitumen, another material, e.g. Polyethylene or polyvinyl chloride with the Spunbond according to the invention can be used.
  • the low basis weight of the spunbonded fabric is advantageous in terms of vapor permeability and material consumption.
  • the weight per unit area of the spunbonded fabric is preferably 70 to 90 g / m 2 .
  • the fine individual titer of the spunbonded filaments gives good adhesion to that of the spunbonded nonwoven connected material, especially the bitumen, due to the high specific surface area of the Spunbond.
  • the individual titer of the spunbonded filaments is preferably 2 to 5 dtex, in particular 4 dtex.
  • Polymers whose melting point is lower than are particularly suitable as melt binders the melting point of the filaments that form the spunbond - the so-called supporting filaments.
  • the melting point of the melt binder is expediently 10 ° C., preferably 30 ° C. below that Melting point of the supporting filaments.
  • melt binders consist of polyesters, preferably polybutylene terephthalate or modified polyesters with a correspondingly lowered melting point, preferably modified Polyethylene terephthalate.
  • the melt binder is preferably introduced in fiber form.
  • the bonding takes place by heat treatment of the fleece, in particular by means of a calender, which can have smooth or profiled rollers, for example embossing rollers with engraving.
  • the consolidation can be carried out exclusively by the calender or by means of calenders (pre-consolidation) and subsequent further heat treatment, for example by means of hot air or radiation energy.
  • the melt binders mentioned above can be used particularly advantageously in the form of binding filaments Fleece during manufacture, i.e. when depositing the filaments on the conveyor belt.
  • the binding filaments melt completely or partially and form the desired binding points at the crossing points of the supporting filaments (Tying sail).
  • the proportion of binder is advantageously 5 to 25% by weight, preferably 10 to 15% by weight.
  • a spunbonded nonwoven made of polyethylene terephthalate filaments with a single titer of 4 dtex and binding filaments made from a modified polyester with a share of 9% was used as the carrier web.
  • the spunbonded web was thermomechanically pre-consolidated by embossing rollers and then finally consolidated by hot air.
  • the basis weight of the support was 100 g / m 2 .
  • the carrier sheet was then bituminized in a roofing membrane system, coated on both sides with bitumen and sanded. An excellent dimensional stability during the processing process was noticed.
  • the roofing membrane produced in this way had the following properties: Basis weight 440 g / m 2 according to DIN 52 123 thickness 0.60 mm "" 52 123 Maximum traction along 320 N / 5 cm “" 52 123 "across 300 N / 5 cm “” 52 123 Maximum tensile strength elongation: longitudinal 35% “" 52 123 across 45% "” 52 123 Static perforation Class L 4 according to NF P 84-352 Nail tear resistance 150 N "UEATC Tear resistance, lengthways 50 N "53 356 across 50 N "53 356

Abstract

The support web consists of a spunbonded material made of polyester filaments. The spunbonded material has an area weight of 50 to 100 g/m<2> with an individual filament count of 1 to 8 dtex and is fastened by a fusible binder. By means of this, a high tear propagation resistance and nail pull-out resistance and also a good dimensional stability results at high temperatures. The spunbonded material is therefore particularly suitable as a support web for bitumenised roof truss webs.

Description

Die Erfindung betrifft eine Trägerbahn für Dachunterspannbahnen sowie eine mit dieser Trägerbahn hergestellte Dachunterspannbahn.The invention relates to a carrier sheet for roofing membranes and one with this carrier sheet manufactured roofing membrane.

Dachunterspannbahnen werden bekanntlich unter den Ziegeln oder Schieferplatten von Steildächern oder dergl. als Schutz gegen Flugschnee, Staub usw. angebracht. Dachunterspannbahnen sollen einerseits wasserundurchlässig und andererseits luft- und dampfdurchlässig sein. Außerdem sollen sie eine hohe Festigkeit, insbesondere Weiterreißfestigkeit, haben, um z.B. bei einem Unfall das Gewicht des Dachdekkers aufnehmen zu können.Roofing membranes are known to be under the tiles or slate of steep roofs or the like as protection against flying snow, dust, etc. Roofing membranes should on the one hand impermeable to water and, on the other hand, permeable to air and steam. They are also said to be high Have strength, in particular tear resistance, e.g. the weight of the roof covering in the event of an accident to be able to record.

Weit verbreitet sind Dachunterspannbahnen aus gitterbewehrten Folien. Diese Folien weisen zwar eine gute Reißfestigkeit auf; unbefriedigend bleibt aber die Weiterreißfestigkeit und häufig auch die Dampfdurchlässigkeit.Roofing membranes made of grid-reinforced foils are widespread. These foils do have one good tear resistance; However, the tear resistance and often also the vapor permeability remain unsatisfactory.

Aus der DE-C- 34 19 675 ist ein Vliesstoff aus Polyäthylenglykolterephthalat und Polybutylenglykolterephthalat bekannt, daß vernadelt und thermisch verfestigt wird.From DE-C-34 19 675 is a nonwoven made of polyethylene glycol terephthalate and Polybutylene glycol terephthalate is known to be needled and thermally solidified.

Aus der DE-OS 34 25 794 ist eine Dachunterspannbahn aus einer Polyurethanfolie bekannt, die mit einer Vliesschicht aus z.B. Polyester belegt ist. In der Beschreibungseinleitung dieser Offenlegungsschrift wird eine Unterspannbahn erwähnt, die aus hochreißfestem Polyester-Spinnvlies besteht und mit einer wasserabweisenden und atmungsaktiven Spezialbeschichtung in Form einer Paste versehen ist. Über den Aufbau der verwendeten Polyester-Vliesstoffe läßt sich dieser Veröffentlichung jedoch nichts entnehmen.From DE-OS 34 25 794 a roofing membrane made of a polyurethane film is known, which with a fleece layer of e.g. Polyester is covered. In the introduction to this disclosure an underlay is mentioned, which consists of highly tear-resistant polyester spunbond and with a water-repellent and breathable special coating in the form of a paste. On the The structure of the polyester nonwovens used, however, nothing can be found in this publication.

Die EP-PS 0027750 beschreibt eine Trägerbahn für eine Dachunterspannbahn, die aus einem Faservlies aus Polypropylen, Polyethylen, Polyester oder Polyvinyl besteht und ein Flächengewicht zwischen 85 und 200 g/m2 aufweist. Zur Herstellung der Dachunterspannbahn wird das Faservlies auf einer Seite mit einer Bitumenschicht versehen, indem das Faservlies mit dem Bitumen warm bestrichen und dann einer Abkühlung unterzogen wird, um Mikrolöcher oder Mikrorisse hervorzurufen. Auch dieser Druckschrift läßt sich jedoch hinsichtlich des Aufbaus des Faservlieses - abgesehen von dem verwendeten Fasermaterial und dem Flächengewicht - nichts entnehmen.EP-PS 0027750 describes a carrier web for a roofing membrane which consists of a nonwoven fabric made of polypropylene, polyethylene, polyester or polyvinyl and has a weight per unit area between 85 and 200 g / m 2 . To produce the roofing membrane, the nonwoven fabric is provided with a bitumen layer on one side by warmly coating the nonwoven fabric with the bitumen and then cooling it to produce microholes or microcracks. This publication, however, does not reveal anything about the structure of the nonwoven fabric - apart from the fiber material used and the weight per unit area.

Der Erfindung liegt die Aufgabe zugrunde, eine Trägerbahn für Dachunterspannbahnen zu schaffen, die für eine hohe Festigkeit, insbesondere Weiterreißfestigkeit der Dachunterspannbahn sorgt und die eine gute Dimensionsstabilität selbst bei hohen Verarbeitungstemperaturen besitzt.The invention has for its object to provide a carrier sheet for roofing membranes, the ensures high strength, in particular tear resistance of the roofing membrane and good Dimensional stability even at high processing temperatures.

Die Lösung der erfindungsgemäßen Aufgabe wird durch eine Trägereinlage gemäß Anspruch 1 realisiert.The object of the invention is achieved by a carrier insert according to claim 1 realized.

Wie in Versuchen festgestellt wurde, erhält die Trägerbahn aufgrund des erfindungsgemäßen Aufbaus des Spinnvlieses eine gute Dimensionsstabilität selbst bei hohen Verarbeitungstemperaturen. Dies ist für die Herstellung von Dachunterspannbahnen von Bedeutung, bei denen die Trägerbahn mit Bitumen versehen wird. Insbesondere beim Tränken der Trägerbahn mit Bitumen herrschen Verarbeitungstemperaturen von 160 bis 180°C. Wie sich gezeigt hat, besitzt die erfindungsgemäß ausgebildete Trägerbahn selbst bei diesen hohen Temperaturen eine gute Dimensionsstabilität, was für die Verarbeitung der Trägerbahn von wesentlicher Bedeutung ist. Trägerbahnen aus Polypropylen, das einen Erweichungspunkt von ca. 156°C hat, sind dagegen beispielsweise für eine Bituminierung weniger geeignet.As was found in tests, the carrier web is given the structure according to the invention the spunbond nonwoven has good dimensional stability even at high processing temperatures. This is for the production of roofing underlays of importance, in which the carrier sheet with bitumen is provided. Processing temperatures are particularly prevalent when impregnating the carrier sheet with bitumen from 160 to 180 ° C. As has been shown, the carrier web designed according to the invention has good dimensional stability even at these high temperatures, which is important for processing the Carrier web is essential. Carrier sheets made of polypropylene, which is a softening point of approx. 156 ° C, on the other hand, are less suitable, for example, for bituminization.

Wie bereits erwähnt, wird die Trägerbahn zur Herstellung einer Dachunterspannbahn vorzugsweise in Verbindung mit Bitumen verwendet. Hierbei wird die Trägerbahn vorzugsweise mit Bitumen getränkt; stattdessen kann die Trägerbahn auch mit Bitumen beschichtet werden, wobei sie vorzugsweise beidseitig mit Bitumen beschichtet wird. As already mentioned, the carrier web for producing a roofing underlay is preferably in Used with bitumen. The carrier web is preferably impregnated with bitumen; instead, the carrier web can also be coated with bitumen, preferably on both sides is coated with bitumen.

Bei der erfindungsgemäß ausgebildeten Trägerbahn ergeben sich eine Weiterreißfestigkeit in der Größenordnung von 20 N bis 80 N, eine Nagelausreißfestigkeit von 50 N bis 180 N und eine Perforafionsstabilität von 400 N bis 1200 N. Hierbei wird die Weiterreißfestigkeit nach DIN 53356, die Nagelausreißfestigkeit nach UEATC-Norm und die Perforationsstabilität nach DIN 54307 bestimmt.The carrier web designed according to the invention has a tear resistance in the The order of magnitude from 20 N to 80 N, a nail pull-out strength from 50 N to 180 N and a perforation stability from 400 N to 1200 N. Here the tear resistance according to DIN 53356, the nail tear resistance determined according to the UEATC standard and the perforation stability according to DIN 54307.

Statt Bitumen könnte jedoch auch ein anderes Material, z.B. Polyethylen oder Polyvinylchlorid mit den erfindungsgemäßen Spinnvlies verwendet werden.However, instead of bitumen, another material, e.g. Polyethylene or polyvinyl chloride with the Spunbond according to the invention can be used.

Das geringe Flächengewicht des Spinnvlieses ist vorteilhaft im Hinblick auf die Dampfdurchlässigkei sowie den Materialverbrauch. Vorzugsweise beträgt das Flächengewicht des Spinnvlieses 70 bis 90 g/m2.The low basis weight of the spunbonded fabric is advantageous in terms of vapor permeability and material consumption. The weight per unit area of the spunbonded fabric is preferably 70 to 90 g / m 2 .

Der feine Einzeltiter der Spinnvlies-Filamente ergibt eine gute Haftung des mit dem Spinnvlies verbundenen Materials, insbesondere des Bitumens, aufgrund der hohen spezifischen Oberfläche des Spinnvlieses. Vorzugsweise beträgt der Einzeltiter der Spinnvlies-Filamente 2 bis 5 dtex, insbesondere 4 dtex.The fine individual titer of the spunbonded filaments gives good adhesion to that of the spunbonded nonwoven connected material, especially the bitumen, due to the high specific surface area of the Spunbond. The individual titer of the spunbonded filaments is preferably 2 to 5 dtex, in particular 4 dtex.

Als Schmelzbinder kommen insbesondere Polymere in Frage, deren Schmelzpunkt niedriger liegt als der Schmelzpunkt der das Spinnvlies bildenden - der sogenannten tragenden - Filamente.Polymers whose melting point is lower than are particularly suitable as melt binders the melting point of the filaments that form the spunbond - the so-called supporting filaments.

Zweckmäßigerweise liegt der Schmelzpunkt des Schmelzbinders 10°C, vorzugsweise 30°C unter dem Schmelzpunkt der tragenden Filamente.The melting point of the melt binder is expediently 10 ° C., preferably 30 ° C. below that Melting point of the supporting filaments.

Besonders geeignete Schmelzbinder bestehen aus Polyestern, vorzugsweise Polybutylenterephthalat oder modifizierten Polyestern mit entsprechend abgesenktem Schmelzpunkt, vorzugsweise modifiziertem Polyethylenterephthalat.Particularly suitable melt binders consist of polyesters, preferably polybutylene terephthalate or modified polyesters with a correspondingly lowered melting point, preferably modified Polyethylene terephthalate.

Der Schmelzbinder wird vorzugsweise in Faserform eingebracht. Die Verfestigung erfolgt durch eine Wärmebehandlung des Vlieses, insbesondere mittels Kalander, wobei dieser glatte oder profilierte Walzen, z.B. Prägewalzen mit Gravur, besitzen kann.
Die Verfestigung kann ausschließlich durch den Kalander erfolgen oder mittels Kalander (Vorverfestigung) und nachgeschalteter weiterer Wärmebehandlung, z.B. mittels Heißluft oder Strahlungsenergie.The melt binder is preferably introduced in fiber form. The bonding takes place by heat treatment of the fleece, in particular by means of a calender, which can have smooth or profiled rollers, for example embossing rollers with engraving.
The consolidation can be carried out exclusively by the calender or by means of calenders (pre-consolidation) and subsequent further heat treatment, for example by means of hot air or radiation energy.

Die oben genannten Schmelzbinder können besonders vorteilhaft in Form von Bindefilamenten dem Vlies bei der Herstellung, d.h. bei der Ablage der Filamente auf dem Transportband, zugemischt werden. Bei einer nachfolgenden Wärmebehandlung z.B. in Heißkalander, schmelzen die Bindefilamente ganz oder teilweise und bilden an dem Kreuzungspunkten der tragenden Filamente die gewünschten Bindepunkte (Bindesegel) aus.The melt binders mentioned above can be used particularly advantageously in the form of binding filaments Fleece during manufacture, i.e. when depositing the filaments on the conveyor belt. In a subsequent heat treatment e.g. in hot calenders, the binding filaments melt completely or partially and form the desired binding points at the crossing points of the supporting filaments (Tying sail).

Der Binderanteil beträgt zweckmäßigerweise 5 bis 25 Gew.-%, vorzugsweise 10 bis 15 Gew.-%.The proportion of binder is advantageously 5 to 25% by weight, preferably 10 to 15% by weight.

Das folgende Beispiel erläutert die Erfindung:
Als Trägerbahn wurde ein Spinnvlies aus Polyethylenterephthalat-Filamenten mit einem Einzeltiter von 4 dtex und Bindefilamenten aus einem modifizierten Polyester mit einem Anteil von 9 % verwendet. Das Spinnvlies wurde durch Prägewalzen thermomechanisch vorverfestigt und anschließend durch Heißluft endverfestigt. Das Flächengewicht des Trägers betrug 100 g/m2. Die Trägerbahn wurde dann in einer Dachbahnanlage bituminiert, beidseitig mit Bitumen beschichtet und besandet. Dabei fiel eine ausgezeichnete Dimensionsstabilität während des Verarbeitungsprozesses auf.The following example explains the invention:
A spunbonded nonwoven made of polyethylene terephthalate filaments with a single titer of 4 dtex and binding filaments made from a modified polyester with a share of 9% was used as the carrier web. The spunbonded web was thermomechanically pre-consolidated by embossing rollers and then finally consolidated by hot air. The basis weight of the support was 100 g / m 2 . The carrier sheet was then bituminized in a roofing membrane system, coated on both sides with bitumen and sanded. An excellent dimensional stability during the processing process was noticed.

Die auf diese Weise hergestellte Dachunterspannbahn hatte folgende Eigenschaften: Flächenmasse 440 g/m2 nach DIN 52 123 Dicke 0,60 mm  "   "  52 123 Höchstzugkraft längs 320 N/5 cm  "   "  52 123   "      quer 300 N/5 cm  "   "  52 123 Höchstzugkraft-Dehnung: längs 35 %  "   "  52 123          quer 45 %  "   "  52 123 Statische Perforation Klasse L 4 nach NF P 84-352 Nagelausreißfestigkeit 150 N   "   UEATC Weiterreißfestigkeit, längs 50 N   "   53 356          quer 50 N   "   53 356 The roofing membrane produced in this way had the following properties: Basis weight 440 g / m 2 according to DIN 52 123 thickness 0.60 mm "" 52 123 Maximum traction along 320 N / 5 cm "" 52 123 "across 300 N / 5 cm "" 52 123 Maximum tensile strength elongation: longitudinal 35% "" 52 123 across 45% "" 52 123 Static perforation Class L 4 according to NF P 84-352 Nail tear resistance 150 N "UEATC Tear resistance, lengthways 50 N "53 356 across 50 N "53 356

Claims (11)

  1. A base felt for roofing underfelts which comprises a spunbonded made of polyester, in particular polyethylene terephthalate, filaments, wherein the spunbonded has a basis weight of 50 - 100 g/m2 coupled with a filament linear density of from 1 to 8 dtex and has been consolidated with a fusible binder comprising a polyester whose melting point is lower than the melting point of the load-carrying filaments, and has a tear strength of from 20 N to 80 N, a nail pullout strength of from 50 N to 180 N and a perforation stability of from 400 N to 1200 N.
  2. The base felt of claim 1, wherein the basis weight of the spunbonded is from 70 to 90 g/m2.
  3. The base felt of claim 1 or 2, wherein the filament linear density of the spunbonded is from 2 to 5 dtex.
  4. The base felt of claim 1, wherein the melting point of the fusible binder is 10°C, preferably 30°C, below the melting point of the load-carrying filaments.
  5. The base felt of either of claims 1 and 4, wherein the fusible binder comprises polybutylene terephthalate or a modified polyester having an appropriately reduced melting point, preferably a modified polyethylene terephthalate.
  6. The base felt of any one of claims 1 to 5, wherein the fusible binder is in the form of binder filaments.
  7. The base felt of at least one of the preceding claims, wherein the fusible binder content is from 5 to 25% by weight.
  8. The base felt of claim 7, wherein the fusible binder content is from 10 to 15% by weight.
  9. A roofing underfelt comprising a base felt as claimed in at least one of the preceding claims, wherein the base felt has been impregnated or coated, in particular coated on both sides, with bitumen.
  10. A process for manufacturing the base felt of claim 1 by producing a spunbonded from polyester filaments in a conventional manner, which comprises introducing the fusible binder in fiber form and consolidating the web by a heat treatment.
  11. The process of claim 10, wherein the consolidation is effected by means of a calender (preconsolidation) and subsequent further heat treatment.
EP19910103645 1990-03-14 1991-03-09 Support web for roof foundation webs Expired - Lifetime EP0446822B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4008043 1990-03-14
DE4008043A DE4008043A1 (en) 1990-03-14 1990-03-14 TRAILER RAIL FOR ROOF TENSION RAILWAYS

Publications (3)

Publication Number Publication Date
EP0446822A1 EP0446822A1 (en) 1991-09-18
EP0446822B1 EP0446822B1 (en) 1995-06-07
EP0446822B2 true EP0446822B2 (en) 1999-06-16

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EP19910103645 Expired - Lifetime EP0446822B2 (en) 1990-03-14 1991-03-09 Support web for roof foundation webs

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US (1) US5130178A (en)
EP (1) EP0446822B2 (en)
JP (1) JP3096311B2 (en)
AT (1) ATE123538T1 (en)
DE (2) DE4008043A1 (en)
DK (1) DK0446822T4 (en)
GR (1) GR3030982T3 (en)
IE (1) IE67658B1 (en)
PT (1) PT97025A (en)

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Also Published As

Publication number Publication date
JPH04214474A (en) 1992-08-05
PT97025A (en) 1993-03-31
IE67658B1 (en) 1996-04-17
ATE123538T1 (en) 1995-06-15
EP0446822B1 (en) 1995-06-07
JP3096311B2 (en) 2000-10-10
GR3030982T3 (en) 1999-12-31
DK0446822T3 (en) 1995-10-16
DE59105638D1 (en) 1995-07-13
DE4008043A1 (en) 1991-09-19
IE910844A1 (en) 1991-09-25
US5130178A (en) 1992-07-14
DK0446822T4 (en) 1999-11-22
EP0446822A1 (en) 1991-09-18

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