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EP0687756A2 - Nonwoven reinforced with filaments - Google Patents

Nonwoven reinforced with filaments Download PDF

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Publication number
EP0687756A2
EP0687756A2 EP95108989A EP95108989A EP0687756A2 EP 0687756 A2 EP0687756 A2 EP 0687756A2 EP 95108989 A EP95108989 A EP 95108989A EP 95108989 A EP95108989 A EP 95108989A EP 0687756 A2 EP0687756 A2 EP 0687756A2
Authority
EP
European Patent Office
Prior art keywords
nonwoven web
filaments
reinforcing yarns
nonwoven
web according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95108989A
Other languages
German (de)
French (fr)
Other versions
EP0687756B1 (en
EP0687756A3 (en
Inventor
Leonardus Johannes Lucas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Akzo Nobel NV
Original Assignee
Akzo Nobel NV
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Filing date
Publication date
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Application filed by Akzo Nobel NV filed Critical Akzo Nobel NV
Publication of EP0687756A2 publication Critical patent/EP0687756A2/en
Publication of EP0687756A3 publication Critical patent/EP0687756A3/en
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Publication of EP0687756B1 publication Critical patent/EP0687756B1/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
    • D04H3/08—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
    • D04H3/147—Composite 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
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D04H3/04—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
    • 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.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • 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.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24074—Strand or strand-portions
    • 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.]
    • Y10T428/24132—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in different layers or components parallel
    • 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]
    • Y10T442/637—Including strand or fiber material which is a monofilament composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
    • Y10T442/641—Sheath-core multicomponent strand or fiber material
    • 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]
    • Y10T442/643—Including parallel strand or fiber material within the nonwoven fabric

Definitions

  • the invention relates to a filament-reinforced nonwoven web, which is reinforced by coulters of reinforcing yarns running parallel and integrated into the nonwoven web.
  • Such a nonwoven web is known from EP-A-0 506 051. It is used as an insert for bitumen membranes and as a roofing membrane. Either binder solutions or dispersions or melt binders are used to strengthen the nonwovens and to connect the nonwoven to the reinforcing yarns. In the case of melt binders, the melt binder is either added to the nonwoven in the form of separate binding filaments or at least some of the filaments of the reinforcing yarns consist of bi-component filaments, one component functioning as a melt binder. In the known nonwoven webs, it has been shown that either the delamination properties are not yet completely satisfactory over the entire surface or that the breaking strength is not reached in height, as is the case itself is to be expected due to the amount of reinforcing yarns used.
  • the object of the present invention is to provide a nonwoven web of the type mentioned in the introduction, in which delamination can practically no longer be ascertained, even in smaller areas, and which has an extraordinarily high stability with a low basis weight.
  • a filament-reinforced nonwoven web which is reinforced by coulters of reinforcing yarns running parallel and integrated in the nonwoven web, the filaments A forming the nonwoven at the crossing points with filaments B of the reinforcing yarns and at least in places the filaments B with one another via a binder are connected, which nonwoven web is characterized by the fact that the filaments A of the nonwoven are also interconnected at their crossing points via the same binder.
  • the reinforcing yarns are preferably arranged at least predominantly in the longitudinal direction of the nonwoven web.
  • the reinforcement yarns are arranged lengthways and crossways, the number of reinforcement yarns per unit length, the strength and the modulus in the longitudinal and transverse directions can be set differently or equally high. By arranging reinforcing yarns crossing one another, the tear strength of the nonwoven web can also be significantly improved.
  • the nonwoven web according to the invention has a nonwoven weight between 50 and 300 g / m2.
  • EP-A-0 506 051 does not describe a nonwoven web in which the binder is used to connect the filaments of the nonwoven to one another, to connect the filaments of the nonwoven to the filaments of the reinforcing yarns and to connect the filaments of the reinforcing yarns to one another. It is therefore all the more surprising that this measure means that delamination is practically no longer observed even in smaller areas and at the same time the stability is increased.
  • the nonwoven web according to the invention is characterized in particular in that the binder is a melt binder, the melting temperature of which is lower than the melting temperature of filaments A and B of the nonwoven web.
  • the filaments A of the nonwoven and the filaments B of the reinforcing yarns consist of a similar, in particular of the same polymer. It is an advantage if bi-component filaments are used for the filaments A of the nonwoven and / or for the filaments B of the reinforcing yarns.
  • the object according to the invention is achieved particularly well if, in the nonwoven web, the filaments A of the nonwoven and the filaments B of the reinforcing yarns consist of bi-component filaments, one component of the bi-component filaments being the melt binder. It is particularly advantageous here if the bi-component filaments are core-sheath filaments, the sheath being the melt binder.
  • the core component of the core-sheath filaments are suitable for the core component of the core-sheath filaments.
  • the same polymers are suitable for the jacket component, but care must be taken to ensure that the jacket component has a melting point which is at least 10 ° C. lower than the melting point of the core component.
  • a particularly favorable choice of polymer for the core-sheath filaments of the nonwoven web according to the invention results if polyester is used as the core component and polyamide, in particular polyamide 6, as the sheath component.
  • the sheath percentage in volume percent of the core-sheath filaments is preferably between 5% and 40%, in particular between 10% and 35%.
  • the task is solved particularly well if the distance between adjacent reinforcing yarns is between 2 and 30 mm, in particular between 4 and 15 mm.
  • the nonwoven web according to the invention is further characterized by a number of particularly favorable properties which make the suitability of this nonwoven web clear as an insert for bitumen webs or as a roofing underlayer, but also as a tufting base for carpets.
  • the modulus at 5% elongation in the nonwoven web according to the invention is preferably at least 170 N, in particular at least 190 N per 5 cm and per 100 g nonwoven weight.
  • the elongation at break can be adjusted well in the nonwoven web according to the invention by combining appropriate filaments with a binder ensuring the elongation at break. However, the elongation at break can also be adjusted accordingly by suitable selection of filaments A and / or filaments B.
  • the elongation at break is preferably between 15% and 70%. The elongation at break can easily be set to between 15% and 50% for bitumen membranes and between 30% and 65% for tufting grounds.
  • the breaking strength is preferably between 300 and 600 N, in particular between 400 to 550 N per 5 cm and per 100 g, while the tear strength has values from 100 to 300 N, preferably from 130 to 250 N per 100 g.
  • the modulus, the elongation at break and the breaking strength are determined on a 5 cm wide strip, in which the reinforcing yarns run in the longitudinal direction, at a drawing speed of 20 cm / min and a temperature of 21 ° C (DIN 533 857). If there are several sets of crossed reinforcement yarns, the module can be measured in any direction in which the reinforcement yarns run.
  • the tear propagation resistance is determined on a 5 cm wide strip, in which the reinforcing yarns run in the transverse direction, at a pulling speed of 10 cm / min and a temperature of 21 ° C (DIN 53 363).
  • the tear propagation strength can be measured transversely to the direction of the reinforcement yarns in the case of crossed reinforcement yarns.
  • the nonwoven web according to the invention also has excellent mechanical stability at high temperature.
  • the mechanical stability at high temperature in the longitudinal and transverse directions is determined as follows: A 10 cm long and 8 cm wide rectangle is recorded centered on a strip 60 cm long and 10 cm wide, the longer side being arranged in the longitudinal direction. The strip is attached between two clamps so that the free length between the clamps is approximately 25 cm. After a 10-minute treatment in an oven heated to 180 ° C under a load of 5.7 N, the dimensions of the rectangle recorded are measured. The difference to the original length or width of the recorded rectangle is set in relation to the original length or width and specified in%.
  • the nonwoven web according to the invention preferably has a stability S l in the longitudinal direction, wherein 4.2 - 0.015 * G ⁇ S l > 0 and where G is the total weight of the nonwoven web in g / m2.
  • a transverse stability being - 4.8 + 0.017 * G ⁇ S q ⁇ 0 and where G is the total weight of the nonwoven web in g / m2, is another preferred embodiment of the nonwoven web according to the invention.
  • Bicomponent filaments of the core-shell type in which the core consists of polyethylene terephthalate and the shell made of polyamide 6, are produced in a known manner in such a way that they have a core fraction of 73 vol% and a shell fraction of 27 vol% exhibit.
  • the core-sheath filaments are then drawn and then have a breaking strength of 36 cN / tex, an elongation at break of 64% and a titer of 1,650 dtex.
  • the core-sheath filaments are deposited in a known manner on a moving steel fabric belt, the feed speed of the core-sheath filaments 358 m / min (example 1) or 376 m / min (example 2) and the speed of the moved Steel mesh belt is 20 m / min (example 1) or 13 m / min (example 2).
  • 143 m 2 yarns per meter are placed on the core-sheath filaments, which are evenly laid in a tangle, at the same speed as the moving steel fabric belt, each yarn consisting of 110 core-sheath filaments of the same type with which the first tangle layer was produced.
  • a further layer of core-sheath filaments of the same type is fed onto the structure that has now arisen in the same way as the first layer, as a result of which they are arranged in a tangled position on the first tangled layer and the yarns which are now parallel.
  • Now hot air is blown onto the resulting structure at a temperature of 224 ° C. through the structure and the steel mesh belt.
  • this thermal treatment which is followed by cooling, the filament-reinforced nonwoven web that has now formed is consolidated.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

Filamentverstärkte Vliesstoffbahn, die durch Scharen von in die Vliesstoffbahn integrierten, parallel laufenden Verstärkungsgarnen verstärkt ist, wobei die das Vlies bildenden Filamente A an den Kreuzungsstellen mit Filamenten B der Verstärkungsgarne und zumindest stellenweise die Filamente B untereinander über einen Binder miteinander verbunden sind, dadurch gekennzeichnet, daß auch die Filamente A des Vliesstoffes untereinander an ihren Kreuzungsstellen über denselben Binder verbunden sind.Filament-reinforced nonwoven web, which is reinforced by coulters of reinforcing yarns running in parallel in the nonwoven web, the filaments A forming the nonwoven being connected to one another at a crossing point with filaments B of the reinforcing yarns and at least in places the filaments B using a binder, that the filaments A of the nonwoven fabric are also connected to one another at their crossing points via the same binder.

Description

Die Erfindung betrifft eine filamentverstärkte Vliesstoffbahn, die durch Scharen von in die Vliesstoffbahn integrierten, parallel laufenden Verstärkungsgarnen verstärkt ist.The invention relates to a filament-reinforced nonwoven web, which is reinforced by coulters of reinforcing yarns running parallel and integrated into the nonwoven web.

Eine derartige Vliesstoffbahn ist aus EP-A-0 506 051 bekannt. Sie wird als Einlage für Bitumenbahnen sowie als Dachunterspannbahn eingesetzt. Zur Verfestigung der Vliese und zur Verbindung des Vliesstoffes mit den Verstärkungsgarnen werden entweder Bindemittel-Lösungen oder -Dispersionen oder Schmelzbinder eingesetzt. Im Falle von Schmelzbinder wird der Schmelzbinder entweder in Form von separaten Bindefilamenten dem Vliesstoff zugegeben oder zumindest ein Teil der Filamente der Verstärkungsgarne besteht aus Bi-Komponenten-Filamenten, wobei die eine Komponente als Schmelzbinder fungiert. Bei den bekannten Vliesstoffbahnen hat es sich gezeigt, daß entweder die Delaminationseigenschaften noch nicht ganzflächig voll zufrieden stellen oder daß die Bruchfestigkeit nicht in der Höhe erreicht wird, wie an sich aufgrund der Menge der eingesetzten Verstärkungsgarne zu erwarten ist.Such a nonwoven web is known from EP-A-0 506 051. It is used as an insert for bitumen membranes and as a roofing membrane. Either binder solutions or dispersions or melt binders are used to strengthen the nonwovens and to connect the nonwoven to the reinforcing yarns. In the case of melt binders, the melt binder is either added to the nonwoven in the form of separate binding filaments or at least some of the filaments of the reinforcing yarns consist of bi-component filaments, one component functioning as a melt binder. In the known nonwoven webs, it has been shown that either the delamination properties are not yet completely satisfactory over the entire surface or that the breaking strength is not reached in height, as is the case itself is to be expected due to the amount of reinforcing yarns used.

Aufgabe der vorliegenden Erfindung ist es, eine Vliesstoffbahn der eingangs genannten Art zur Verfügung zu stellen, bei der eine Delamination auch in kleineren Bereichen praktisch nicht mehr festgestellt werden kann, und die bei geringem Flächengewicht eine außergewöhnlich hohe Stabilität aufweist.The object of the present invention is to provide a nonwoven web of the type mentioned in the introduction, in which delamination can practically no longer be ascertained, even in smaller areas, and which has an extraordinarily high stability with a low basis weight.

Gelöst wird diese Aufgabe durch eine filamentverstärkte Vliesstoffbahn, die durch Scharen von in die Vliesstoffbahn integrierten, parallel laufenden Verstärkungsgarnen verstärkt ist, wobei die das Vlies bildenden Filamente A an den Kreuzungsstellen mit Filamenten B der Verstärkungsgarne und zumindest stellenweise die Filamente B untereinander über einen Binder miteinander verbunden sind, welche Vliesstoffbahn sich dadurch auszeichnet, daß auch die Filamente A des Vliesstoffes untereinander an ihren Kreuzungsstellen über denselben Binder verbunden sind. Bevorzugt sind die Verstärkungsgarne zumindest überwiegend in Längsrichtung der Vliesstoffbahn angeordnet.This object is achieved by a filament-reinforced nonwoven web, which is reinforced by coulters of reinforcing yarns running parallel and integrated in the nonwoven web, the filaments A forming the nonwoven at the crossing points with filaments B of the reinforcing yarns and at least in places the filaments B with one another via a binder are connected, which nonwoven web is characterized by the fact that the filaments A of the nonwoven are also interconnected at their crossing points via the same binder. The reinforcing yarns are preferably arranged at least predominantly in the longitudinal direction of the nonwoven web.

Es können aber auch mehrere Scharen von parallellaufenden Verstärkungsgarnen vorhanden sein, wobei es dann von Vorteil ist, daß sich mindestens zwei Scharen der in die Vliesstoffbahn integrierten parallelen Verstärkungsgarne kreuzen. Hierbei hat es sich besonders bewährt, wenn eine Schar zumindest überwiegend in Längsrichtung und eine andere Schar zumindest überwiegend in Querrichtung des Vlieses angeordnet ist. Die Anordnung von sich überkreuzenden Verstärkungsgarnen führt zu einer besonders guten Formstabilität der erfindungsgemäßen Vliesstoffbahn. Sie weist auch kaum Welligkeit auf. Durch entsprechendes Auswählen der Kreuzungswinkel der Verstärkungsgarne kann die Zugfestigkeit und der Modul der erfindungsgemäßen Vliesstoffbahn in bestimmten Richtungen beeinflußt werden. Werden beispielsweise die Verstärkungsgarne längs und quer angeordnet, kann durch die Anzahl der Verstärkungsgarne pro Längeneinheit, die Festigkeit und der Modul in Längs- und Querrichtung unterschiedlich oder auch gleich hoch eingestellt werden. Durch Anordnung sich überkreuzender Verstärkungsgarne kann auch die Weiterreißfestigkeit der Vliesstoffbahn deutlich verbessert werden.However, there may also be a plurality of sets of reinforcing yarns running in parallel, it then being advantageous for at least two sets of the parallel reinforcing yarns integrated into the nonwoven web to cross. It has proven particularly useful if one family is arranged at least predominantly in the longitudinal direction and another family at least predominantly in the transverse direction of the fleece. The arrangement of reinforcing yarns crossing one another leads to particularly good dimensional stability of the nonwoven web according to the invention. It also shows little ripple. By selecting the Crossing angle of the reinforcing yarns can influence the tensile strength and the modulus of the nonwoven web according to the invention in certain directions. If, for example, the reinforcement yarns are arranged lengthways and crossways, the number of reinforcement yarns per unit length, the strength and the modulus in the longitudinal and transverse directions can be set differently or equally high. By arranging reinforcing yarns crossing one another, the tear strength of the nonwoven web can also be significantly improved.

Es ist von Vorteil, wenn die erfindungsgemäße Vliesstoffbahn ein Vliesgewicht zwischen 50 und 300 g/m² aufweist.It is advantageous if the nonwoven web according to the invention has a nonwoven weight between 50 and 300 g / m².

Eine Vliesstoffbahn bei der der Binder zur Verbindung der Filamente des Vliesstoffes untereinander, der Verbindung der Filamente des Vliesstoffes mit den Filamenten der Verstärkungsgarne und der Verbindung der Filamente der Verstärkungsgarne untereinander dient, ist in der EP-A-0 506 051 nicht beschrieben. Umso überraschender muß es angesehen werden, daß durch diese Maßnahme eine Delamination auch in kleineren Bereichen praktisch nicht mehr beobachtet wird und gleichzeitig noch die Stabilität gesteigert wird.EP-A-0 506 051 does not describe a nonwoven web in which the binder is used to connect the filaments of the nonwoven to one another, to connect the filaments of the nonwoven to the filaments of the reinforcing yarns and to connect the filaments of the reinforcing yarns to one another. It is therefore all the more surprising that this measure means that delamination is practically no longer observed even in smaller areas and at the same time the stability is increased.

Die erfindungsgemäße Vliesstoffbahn zeichnet sich insbesondere dadurch aus, daß der Binder ein Schmelzbinder ist, dessen Schmelztemperatur kleiner ist als die Schmelztemperatur der Filamente A und B der Vliesstoffbahn.The nonwoven web according to the invention is characterized in particular in that the binder is a melt binder, the melting temperature of which is lower than the melting temperature of filaments A and B of the nonwoven web.

Besonders günstig ist es, wenn bei der erfindungsgemäßen Vliesstoffbahn die Filamente A des Vliesstoffes und die Filamente B der Verstärkungsgarne aus einem ähnlichen, insbesondere aus demselben Polymer bestehen. Es ist von Vorteil, wenn für die Filamente A des Vliesstoffes und/oder für die Filamente B der Verstärkungsgarne Bi-Komponenten-Filamente verwendet werden.It is particularly favorable if, in the nonwoven web according to the invention, the filaments A of the nonwoven and the filaments B of the reinforcing yarns consist of a similar, in particular of the same polymer. It is an advantage if bi-component filaments are used for the filaments A of the nonwoven and / or for the filaments B of the reinforcing yarns.

Die erfindungsgemäß gestellte Aufgabe gelingt vorzüglich, wenn bei der Vliesstoffbahn die Filamente A des Vliesstoffes und die Filamente B der Verstärkungsgarne aus Bi-KomponentenFilamenten bestehen, wobei die eine Komponente der Bi-Komponenten-Filamente der Schmelzbinder ist. Besonders günstig hierbei ist es, wenn die Bi-Komponenten-Filamente Kern-Mantel-Filamente sind, wobei der Mantel der Schmelzbinder ist.The object according to the invention is achieved particularly well if, in the nonwoven web, the filaments A of the nonwoven and the filaments B of the reinforcing yarns consist of bi-component filaments, one component of the bi-component filaments being the melt binder. It is particularly advantageous here if the bi-component filaments are core-sheath filaments, the sheath being the melt binder.

Für die Kernkomponente der Kern-Mantel-Filamente eignen sich praktisch alle schmelzbaren Polymere, wie beispielsweise Polyäthylenterephthalat, Polypropylen, Polyäthylen, Polyamid, Polyurethan oder PVC. Für die Mantelkomponente eignen sich dieselben Polymere, wobei jedoch darauf zu achten ist, daß die Mantelkomponente einen Schmelzpunkt aufweist, welcher um mindestens 10°C tiefer liegt als der Schmelzpunkt der Kernkomponente. Eine besonders günstige Polymerauswahl für die Kern-Mantel-Filamente der erfindungsgemäßen Vliesstoffbahn ergibt sich, wenn Polyester als Kernkomponente und Polyamid, insbesondere Polyamid 6, als Mantelkomponente eingesetzt wird. Hierbei liegt bevorzugt der Mantelanteil in Volumenprozent der Kern-Mantel-Filamente zwischen 5% und 40%, insbesondere zwischen 10% und 35%.Practically all fusible polymers, such as, for example, polyethylene terephthalate, polypropylene, polyethylene, polyamide, polyurethane or PVC, are suitable for the core component of the core-sheath filaments. The same polymers are suitable for the jacket component, but care must be taken to ensure that the jacket component has a melting point which is at least 10 ° C. lower than the melting point of the core component. A particularly favorable choice of polymer for the core-sheath filaments of the nonwoven web according to the invention results if polyester is used as the core component and polyamide, in particular polyamide 6, as the sheath component. Here, the sheath percentage in volume percent of the core-sheath filaments is preferably between 5% and 40%, in particular between 10% and 35%.

Bei der erfindungsgemäßen Vliesstoffbahn ist die gestellte Aufgabe besonders gut gelöst, wenn der Abstand benachbarter Verstärkungsgarne zwischen 2 und 30 mm, insbesondere zwischen 4 und 15 mm, liegt.In the nonwoven web according to the invention, the task is solved particularly well if the distance between adjacent reinforcing yarns is between 2 and 30 mm, in particular between 4 and 15 mm.

Die erfindungsgemäße Vliesstoffbahn zeichnet sich weiterhin durch eine Reihe von besonders günstigen Eigenschaften aus, die die Eignung dieser Vliesstoffbahn als Einlage für Bitumenbahnen oder als Dachunterspannbahn aber auch als Tuftinggrund für Teppiche deutlich macht.The nonwoven web according to the invention is further characterized by a number of particularly favorable properties which make the suitability of this nonwoven web clear as an insert for bitumen webs or as a roofing underlayer, but also as a tufting base for carpets.

Der Modul bei 5% Dehnung liegt bei der erfindungsgemäßen Vliesstoffbahn bevorzugt bei mindestens 170 N, insbesondere bei mindestens 190 N pro 5cm und pro 100 g Vliesgewicht.The modulus at 5% elongation in the nonwoven web according to the invention is preferably at least 170 N, in particular at least 190 N per 5 cm and per 100 g nonwoven weight.

Die Bruchdehnung läßt sich bei der erfindungsgemäßen Vliesstoffbahn gut einstellen, indem entsprechende Filamente mit einem die Bruchdehnung gewährleistenden Binder kombiniert werden. Die Bruchdehnung kann aber auch durch geeignete Auswahl der Filamente A und/oder der Filamente B entsprechend eingestellt werden. Die Bruchdehnung liegt bevorzugt zwischen 15% und 70%. Für Bitumenbahnen läßt sich die Bruchdehnung leicht auf 15% bis 50% und für Tuftinggrund auf 30% bis 65% einstellen.The elongation at break can be adjusted well in the nonwoven web according to the invention by combining appropriate filaments with a binder ensuring the elongation at break. However, the elongation at break can also be adjusted accordingly by suitable selection of filaments A and / or filaments B. The elongation at break is preferably between 15% and 70%. The elongation at break can easily be set to between 15% and 50% for bitumen membranes and between 30% and 65% for tufting grounds.

Die Bruchfestigkeit liegt bevorzugt zwischen 300 und 600 N, insbesondere zwischen 400 bis 550 N pro 5 cm und pro 100 g, während die Weiterreißfestigkeit Werte von 100 bis 300 N, bevorzugt von 130 bis 250 N pro 100 g aufweist.The breaking strength is preferably between 300 and 600 N, in particular between 400 to 550 N per 5 cm and per 100 g, while the tear strength has values from 100 to 300 N, preferably from 130 to 250 N per 100 g.

Der Modul, die Bruchdehnung und die Bruchfestigkeit werden an einem 5 cm breiten Streifen, bei dem die Verstärkungsgarne in Längsrichtung verlaufen, bei einer Ziehgeschwindigkeit von 20 cm/min und einer Temperatur von 21 °C bestimmt (DIN 533 857). Sind mehrere Scharen von sich überkreuzenden Verstärkungsgarnen vorhanden, kann der Modul in jeder Richtung, in der die Verstärkungsgarne laufen, gemessen werden.The modulus, the elongation at break and the breaking strength are determined on a 5 cm wide strip, in which the reinforcing yarns run in the longitudinal direction, at a drawing speed of 20 cm / min and a temperature of 21 ° C (DIN 533 857). If there are several sets of crossed reinforcement yarns, the module can be measured in any direction in which the reinforcement yarns run.

Die Weiterreißfestigkeit wird an einem 5 cm breiten Streifen, bei dem die Verstärkungsgarne in Querrichtung verlaufen, bei einer Ziehgeschwindigkeit von 10 cm/min und einer Temperatur von 21°C bestimmt (DIN 53 363). Auch hier kann die Weiterreißfestigkeit bei sich überkreuzenden Verstärkungsgarnen jeweils quer zur Richtung der Verstärkungsgarne gemessen werden.The tear propagation resistance is determined on a 5 cm wide strip, in which the reinforcing yarns run in the transverse direction, at a pulling speed of 10 cm / min and a temperature of 21 ° C (DIN 53 363). Here, too, the tear propagation strength can be measured transversely to the direction of the reinforcement yarns in the case of crossed reinforcement yarns.

Die erfindungsgemäße Vliesstoffbahn weist außerdem eine ausgezeichnete mechanische Stabilität bei hoher Temperatur auf. Die mechanische Stabilität bei hoher Temperatur in Längs- und in Querrichtung wird folgendermaßen bestimmt: Auf einen Streifen von 60 cm Länge und 10 cm Breite wird zentriert ein 10 cm langes und 8 cm breites Rechteck aufgezeichnet, wobei die längere Seite in Längsrichtung angeordnet ist. Der Streifen wird zwischen zwei Klemmen derart befestigt, daß die freie Länge zwischen den Klemmen etwa 25 cm beträgt. Nach einer 10-minütigen Behandlung in einem auf 180°C aufgeheizten Ofen unter einer Belastung von 5,7 N werden die Abmessungen des aufgezeichneten Rechtecks gemessen. Die Differenz zur ursprünglichen Länge bzw. Breite des aufgezeichneten Rechtecks wird ins Verhältnis zur ursprünglichen Länge bzw. Breite gesetzt und in % angegeben.The nonwoven web according to the invention also has excellent mechanical stability at high temperature. The mechanical stability at high temperature in the longitudinal and transverse directions is determined as follows: A 10 cm long and 8 cm wide rectangle is recorded centered on a strip 60 cm long and 10 cm wide, the longer side being arranged in the longitudinal direction. The strip is attached between two clamps so that the free length between the clamps is approximately 25 cm. After a 10-minute treatment in an oven heated to 180 ° C under a load of 5.7 N, the dimensions of the rectangle recorded are measured. The difference to the original length or width of the recorded rectangle is set in relation to the original length or width and specified in%.

Die erfindungsgemäße Vliesstoffbahn weist bevorzugt eine Stabilität Sl in Längsrichtung auf, wobei
4,2 - 0,015 * G ≧S l > 0

Figure imgb0001
und wobei
G das Gesamtgewicht der Vliesstoffbahn in g/m² ist.
Eine Stabilität in Querrichtung, wobei
- 4,8 + 0,017 * G ≦S q ≦0
Figure imgb0002
 und wobei
G das Gesamtgewicht der Vliesstoffbahn in g/m² ist, ist ein weitere bevorzugte Ausführungsform der erfindungsgemäßen Vliesstoffbahn.The nonwoven web according to the invention preferably has a stability S l in the longitudinal direction, wherein
4.2 - 0.015 * G ≧ S l > 0
Figure imgb0001
 and where
G is the total weight of the nonwoven web in g / m².
A transverse stability, being
- 4.8 + 0.017 * G ≦ S q ≦ 0
Figure imgb0002
 and where
G is the total weight of the nonwoven web in g / m², is another preferred embodiment of the nonwoven web according to the invention.

Die Erfindung wird anhand der nachfolgenden Beispiele näher erläutert.The invention is illustrated by the following examples.

Bi-Komponenten-Filamente des Kern-Mantel-Typs, bei denen der Kern aus Polyäthylenterephthalat und der Mantel aus Polyamid 6 besteht, werden in bekannter Weise derart hergestellt, daß sie einen Kern-Anteil von 73 vol% und einen Mantelanteil von 27 vol% aufweisen. Die Kern-Mantel-Filamente werden anschließend verstreckt und weisen dann eine Bruchfestigkeit von 36 cN/tex eine Bruchdehnung von 64% und einen Titer von 1 650 dtex auf. Die Kern-Mantel-Filamente werden in bekannter Weise auf einem bewegten Stahlgewebe-Band abgelegt, wobei die Zuführgeschwindigkeit der Kern-Mantel-Filamente 358 m/min (Beispiel 1) bzw. 376 m/min (Beispiel 2) und die Geschwindigkeit des bewegten Stahlgewebe-Bandes 20 m/min (Beispiel 1) bzw. 13 m/min (Beispiel 2) beträgt. Auf die gleichmäßig in Wirrlage abgelegten Kern-Mantel-Filamente werden pro m 143 Garne mit derselben Geschwindigkeit, wie sich das bewegte Stahlgewebe-Band bewegt, aufgelegt, wobei jedes Garn aus 110 Kern-Mantel-Filamenten desselben Typs besteht, mit welchem die erste Wirrlage hergestellt wurde. Auf das nunmehr entstandene Gebilde wird eine weitere Lage von Kern-Mantel-Filamenten desselben Typs in derselben Weise wie die erste Lage zugeführt, wodurch sich diese wiederum in Wirrlage auf die erste Wirrlage und die inzwischen parallel aufliegenden Garne anordnen. Nun wird auf das entstandene Gebilde heiße Luft mit einer Temperatur von 224 °C durch das Gebilde und das Stahlgewebe-Band hindurchgeblasen. Durch diese thermische Behandlung, der eine Kühlung folgt, wird die nunmehr entstandene filamentverstärkte Vliesstoffbahn verfestigt. Sie weist danach folgende Eigenschaften auf: Beispiel 1 2 Flächengewicht g/m² 110 170 Modul bei 5% Dehnung N/5 cm 223 320 Bruchdehnung % 35 40 Bruchfestigkeit N/5 cm 580 893 Weiterreißfestigkeit N 238 365 Stabilität in Längsrichtung % 2,0 1,0 Stabilität in Querrichtung Sq % - 2,0 - 1,0 Bicomponent filaments of the core-shell type, in which the core consists of polyethylene terephthalate and the shell made of polyamide 6, are produced in a known manner in such a way that they have a core fraction of 73 vol% and a shell fraction of 27 vol% exhibit. The core-sheath filaments are then drawn and then have a breaking strength of 36 cN / tex, an elongation at break of 64% and a titer of 1,650 dtex. The core-sheath filaments are deposited in a known manner on a moving steel fabric belt, the feed speed of the core-sheath filaments 358 m / min (example 1) or 376 m / min (example 2) and the speed of the moved Steel mesh belt is 20 m / min (example 1) or 13 m / min (example 2). 143 m 2 yarns per meter are placed on the core-sheath filaments, which are evenly laid in a tangle, at the same speed as the moving steel fabric belt, each yarn consisting of 110 core-sheath filaments of the same type with which the first tangle layer was produced. A further layer of core-sheath filaments of the same type is fed onto the structure that has now arisen in the same way as the first layer, as a result of which they are arranged in a tangled position on the first tangled layer and the yarns which are now parallel. Now hot air is blown onto the resulting structure at a temperature of 224 ° C. through the structure and the steel mesh belt. As a result of this thermal treatment, which is followed by cooling, the filament-reinforced nonwoven web that has now formed is consolidated. It then has the following properties: example 1 2nd Basis weight g / m² 110 170 Module at 5% elongation N / 5 cm 223 320 Elongation at break % 35 40 Breaking strength N / 5 cm 580 893 Tear resistance N 238 365 Longitudinal stability % 2.0 1.0 Transverse stability S q % - 2.0 - 1.0

Claims (27)

Filamentverstärkte Vliesstoffbahn, die durch Scharen von in die Vliesstoffbahn integrierten, parallel laufenden Verstärkungsgarnen verstärkt ist, wobei die das Vlies bildenden Filamente A an den Kreuzungsstellen mit Filamenten B der Verstärkungsgarne und zumindest stellenweise die Filamente B untereinander über einen Binder miteinander verbunden sind, dadurch gekennzeichnet, daß auch die Filamente A des Vliesstoffes untereinander an ihren Kreuzungsstellen über denselben Binder verbunden sind.Filament-reinforced nonwoven web, which is reinforced by coulters of reinforcing yarns running in parallel in the nonwoven web, the filaments A forming the nonwoven being connected to one another at a crossing point with filaments B of the reinforcing yarns and at least in places the filaments B using a binder, that the filaments A of the nonwoven fabric are also connected to one another at their crossing points via the same binder. Vliesstoffbahn nach Anspruch 1, dadurch gekennzeichnet, daß die Verstärkungsgarne zumindest überwiegend in Längsrichtung der Vliesstoffbahn angeordnet sind.Nonwoven web according to claim 1, characterized in that the reinforcing yarns are arranged at least predominantly in the longitudinal direction of the nonwoven web. Vliesstoffbahn nach Anspruch 1, dadurch gekennzeichnet, daß mindestens zwei Scharen von parallellaufenden Verstärkungsgarnen derart in die Vliesstoffbahn integriert sind, daß sich die Verstärkungsgarne kreuzen.Nonwoven web according to claim 1, characterized in that at least two sets of parallel reinforcing yarns are integrated into the nonwoven web such that the reinforcing yarns cross. Vliesstoffbahn nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß eine Schar der parallellaufenden Verstärkungsgarne zumindest überwiegend in Längsrichtung und eine andere Schar der parallellaufenden Verstärkungsgarne zumindest überwiegend in Querrichtung der Vliesstoffbahn angeordnet ist.Nonwoven web according to claim 1 or 3, characterized in that a family of parallel reinforcing yarns is arranged at least predominantly in the longitudinal direction and another family of parallel reinforcing yarns is arranged at least predominantly in the transverse direction of the nonwoven web. Vliesstoffbahn nach Anspruch 1 oder 4, dadurch gekennzeichnet, daß der Binder ein Schmelzbinder ist, dessen Schmelztemperatur kleiner ist als die Schmelztemperatur der Filamente A und B der Vliesstoffbahn.Nonwoven web according to claim 1 or 4, characterized in that the binder is a melt binder, the melting temperature of which is lower than the melting temperature of filaments A and B of the nonwoven web. Vliesstoffbahn nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Filamente A des Vliesstoffes und die Filamente B der Verstärkungsgarne aus einem ähnlichen Polymer bestehen.Nonwoven web according to one or more of claims 1 to 5, characterized in that the filaments A of the nonwoven and the filaments B of the reinforcing yarns consist of a similar polymer. Vliesstoffbahn nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Filamente A des Vliesstoffes und die Filamente B der Verstärkungsgarne aus demselben Polymer bestehen.Nonwoven web according to one or more of claims 1 to 5, characterized in that the filaments A of the nonwoven and the filaments B of the reinforcing yarns consist of the same polymer. Vliesstoffbahn nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Filamente A des Vliesstoffes und/oder die Filamente B der Verstärkungsgarne Bi-Komponenten-Filamente sind.Nonwoven web according to one or more of claims 1 to 7, characterized in that the filaments A of the nonwoven and / or the filaments B of the reinforcing yarns are bi-component filaments. Vliesstoffbahn nach einem oder mehreren der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß die Filamente A des Vliesstoffes und die Filamente B der Verstärkungsgarne Bi-Komponenten-Filamenten sind, wobei die eine Komponente der Bi-Komponenten-Filamente der Schmelzbinder ist.Nonwoven web according to one or more of claims 5 to 7, characterized in that the filaments A of the nonwoven and the filaments B of the reinforcing yarns are bi-component filaments, one component of the bi-component filaments being the melt binder. Vliesstoffbahn nach Anspruch 9, dadurch gekennzeichnet, daß die Bi-Komponenten-Filamente Kern-Mantel-Filamente sind, wobei der Mantel der Schmelzbinder ist.Nonwoven web according to claim 9, characterized in that the bi-component filaments are core-sheath filaments, the sheath being the melt binder. Vliesstoffbahn nach Anspruch 10, dadurch gekennzeichnet, daß die Kernkomponente aus einem Polyester und die Mantelkomponente aus einem Polyamid besteht.Nonwoven web according to claim 10, characterized in that the core component consists of a polyester and the sheath component consists of a polyamide. Vliesstoffbahn nach Anspruch 10 oder 11, dadurch gekennzeichnet, daß die Mantelkomponente aus Polyamid 6 besteht.Nonwoven web according to claim 10 or 11, characterized in that the sheath component consists of polyamide 6. Vliesstoffbahn nach einem oder mehreren der Ansprüche 10 bis 12, dadurch gekennzeichnet, daß der Mantelanteil in Volumenprozent der Kern-Mantel-Filamente zwischen 5% und 40% liegt.Nonwoven web according to one or more of claims 10 to 12, characterized in that the sheath percentage in volume percent of the core-sheath filaments is between 5% and 40%. Vliesstoffbahn nach Anspruch 13, dadurch gekennzeichnet, daß der Mantelanteil der Kern-Mantel-Filamente zwischen 10% und 35% liegt.Nonwoven web according to claim 13, characterized in that the sheath proportion of the core-sheath filaments is between 10% and 35%. Vliesstoffbahn nach einem oder mehreren der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß der Abstand benachbarter Verstärkungsgarne zwischen 2 und 30 mm liegt.Nonwoven web according to one or more of claims 1 to 14, characterized in that the distance between adjacent reinforcing yarns is between 2 and 30 mm. Vliesstoffbahn nach einem oder mehreren der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß der Abstand benachbarter Verstärkungsgarne zwischen 4 und 15 mm liegt.Nonwoven web according to one or more of claims 1 to 14, characterized in that the distance between adjacent reinforcing yarns is between 4 and 15 mm. Vliesstoffbahn nach einem oder mehreren der Ansprüche 1 bis 16, dadurch gekennzeichnet, daß die Vliesstoffbahn einen Modul bei 5% Dehnung von mindestens 170 N pro 5cm und pro 100 g Vliesgewicht aufweist, gemessen jeweils in Richtung der Verstärkungsgarne.Nonwoven web according to one or more of claims 1 to 16, characterized in that the nonwoven web has a modulus at 5% elongation of at least 170 N per 5cm and per 100 g nonwoven weight, measured in the direction of the reinforcing yarns. Vliesstoffbahn nach Anspruch 17, dadurch gekennzeichnet, daß die Vliesstoffbahn einen Modul bei 5% Dehnung von mindestens 190 N pro 5cm und pro 100 g aufweist, gemessen jeweils in Richtung der Verstärkungsgarne.Nonwoven web according to claim 17, characterized in that the nonwoven web has a modulus at 5% elongation of at least 190 N per 5 cm and per 100 g, measured in each case in the direction of the reinforcing yarns. Vliesstoffbahn nach einem oder mehreren der Ansprüche 1 bis 18, dadurch gekennzeichnet, daß die Vliesstoffbahn jeweils in Richtung der Verstärkungsgarne eine Bruchdehnung von 15% bis 70% aufweist.Nonwoven web according to one or more of claims 1 to 18, characterized in that the nonwoven web has an elongation at break of 15% to 70% in the direction of the reinforcing yarns. Vliesstoffbahn nach Anspruch 19, dadurch gekennzeichnet, daß die Vliesstoffbahn eine Bruchdehnung jeweils in Richtung der Verstärkungsgarne von 15% bis 50% aufweist.Nonwoven web according to claim 19, characterized in that the nonwoven web has an elongation at break in the direction of the reinforcing yarns of 15% to 50%. Vliesstoffbahn nach Anspruch 19, dadurch gekennzeichnet, daß die Vliesstoffbahn, jeweils in Richtung der Verstärkungsgarne eine Bruchdehnung von 20% bis 65% aufweist.Nonwoven web according to claim 19, characterized in that the nonwoven web has an elongation at break of 20% to 65% in each case in the direction of the reinforcing yarns. Vliesstoffbahn nach einem oder mehreren der Ansprüche 1 bis 21, dadurch gekennzeichnet, daß die Vliesstoffbahn jeweils in Richtung der Verstärkungsgarne eine Bruchfestigkeit von 300 bis 600 N pro 5 cm und pro 100 g aufweist.Nonwoven web according to one or more of claims 1 to 21, characterized in that the nonwoven web has a breaking strength of 300 to 600 N per 5 cm and per 100 g in the direction of the reinforcing yarns. Vliesstoffbahn nach Anspruch 22, dadurch gekennzeichnet, daß die Vliesstoffbahn jeweils in Richtung der Verstärkungsgarne eine Bruchfestigkeit von 400 bis 550 N pro 5 cm und pro 100 g aufweist.Nonwoven web according to claim 22, characterized in that the nonwoven web has a breaking strength of 400 to 550 N per 5 cm and per 100 g in the direction of the reinforcing yarns. Vliesstoffbahn nach einem oder mehreren der Ansprüche 1 bis 23, dadurch gekennzeichnet, daß die Vliesstoffbahn eine Weiterreißfestigkeit von 100 bis 300 N pro 100 g aufweist.Nonwoven web according to one or more of claims 1 to 23, characterized in that the nonwoven web has a tear strength of 100 to 300 N per 100 g. Vliesstoffbahn nach Anspruch 24, dadurch gekennzeichnet, daß die Vliesstoffbahn eine Weiterreißfestigkeit von 130 bis 250 N pro 100 g aufweist.Nonwoven web according to claim 24, characterized in that the nonwoven web has a tear strength of 130 to 250 N per 100 g. Vliesstoffbahn nach einem oder mehreren der Ansprüche 1 bis 25, dadurch gekennzeichnet, daß die Vliesstoffbahn eine Stabilität Sl in Längsrichtung aufweist, wobei
4,2 - 0,015 * G ≧S l > 0
Figure imgb0003
 und wobei
G das Gesamtgewicht der Vliesstoffbahn in g/m² ist.Nonwoven web according to one or more of claims 1 to 25, characterized in that the nonwoven web has a stability S l in the longitudinal direction, wherein
4.2 - 0.015 * G ≧ S l > 0
Figure imgb0003
 and where
G is the total weight of the nonwoven web in g / m². Vliesstoffbahn nach einem oder mehreren der Ansprüche 1 bis 26, dadurch gekennzeichnet, daß die Vliesstoffbahn eine Stabilität Sq in Querrichtung aufweist, wobei
-4,8 + 0,017 * G ≦S q ≦0
Figure imgb0004
 und wobei
G das Gesamtgewicht der Vliesstoffbahn in g/m² ist.Nonwoven web according to one or more of claims 1 to 26, characterized in that the nonwoven web has a stability S q in the transverse direction, wherein
-4.8 + 0.017 * G ≦ S q ≦ 0
Figure imgb0004
 and where
G is the total weight of the nonwoven web in g / m².
EP95108989A 1994-06-16 1995-06-10 Nonwoven reinforced with filaments Revoked EP0687756B1 (en)

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