EP2183419A1 - Base non-woven fibre for trilaminates - Google Patents

Base non-woven fibre for trilaminates

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Publication number
EP2183419A1
EP2183419A1 EP08785952A EP08785952A EP2183419A1 EP 2183419 A1 EP2183419 A1 EP 2183419A1 EP 08785952 A EP08785952 A EP 08785952A EP 08785952 A EP08785952 A EP 08785952A EP 2183419 A1 EP2183419 A1 EP 2183419A1
Authority
EP
European Patent Office
Prior art keywords
fleece
dtex
base
mixture
laid
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
EP08785952A
Other languages
German (de)
French (fr)
Other versions
EP2183419B1 (en
Inventor
Rudolf Schlotter
Peter Friedrich
Jürgen HECK
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.)
Eswegee Vliesstoff GmbH
Original Assignee
Eswegee Vliesstoff GmbH
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Filing date
Publication date
Application filed by Eswegee Vliesstoff GmbH filed Critical Eswegee Vliesstoff GmbH
Publication of EP2183419A1 publication Critical patent/EP2183419A1/en
Application granted granted Critical
Publication of EP2183419B1 publication Critical patent/EP2183419B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
    • D04H1/5418—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D12/00—Non-structural supports for roofing materials, e.g. battens, boards
    • E04D12/002—Sheets of flexible material, e.g. roofing tile underlay
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/542—Adhesive fibres
    • D04H1/544—Olefin series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/542—Adhesive fibres
    • D04H1/55—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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
    • 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
    • D04H13/00—Other non-woven fabrics

Definitions

  • the invention relates to a base web for trilaminates which have a film membrane connected to the base web and a cover layer arranged thereon, according to the preamble of patent claim 1.
  • Multilayer films with adjustable water vapor permeability are known as so-called roof underlays.
  • roof underlays For the state of the art, reference is made here, for example, to DE 199 11 280 A1, DE 199 44 819 A1 or DE 10 2005 038 863 A1.
  • Such films consist of a water vapor permeable base layer of a first plastic material and at least one coupled to the base layer Wasserdampf admirados- controlling second layer of a second plastic material.
  • a third layer formed as a cover layer may be present.
  • a vapor-permeable roof underlay with an inner film layer containing an at least three-ply composite with outer nonwoven layers based on thermoplastic materials and an inner film layer is known.
  • outer nonwoven layers based on polyester filaments with a basis weight of 30 to 120 g / m 2 it has been proposed in the cited teaching to use outer nonwoven layers based on polyester filaments with a basis weight of 30 to 120 g / m 2 .
  • a strength improvement should also be made possible by the use of embossed nonwoven layers.
  • the nonwoven layers of continuous filaments not only on the basis of polypropylene or polyethylene alone, but in Form a compound with a low content of ethylene-vinyl acetate copolymers.
  • the base fleece to be created is to be produced in a cost-effective and reproducible manner, it being simple to provide means which permit adhesion of the film membrane to be applied as an intermediate layer of the trimanate.
  • the basic idea of the invention is to replace hitherto used spun-bonded nonwovens by staple fiber nonwovens, wherein the means for thermally fixing the membrane of the membrane are applied sparingly and if possible in the actual production process of the base nonwoven.
  • the desired breathability and vapor permeability of the base fabric is ensured in any case and sufficient strength, especially in the transverse direction, guaranteed.
  • the embodiments of the invention is common that the staple fiber fleece is formed from a cross-laid and longitudinal pile and To obtain a hydrophobic surface, a temperature-assisted compaction takes place.
  • a mixture of polyester fibers and polypropylene melt fibers is used for the formation of the crossed pile.
  • the proportion of polypropylene melt fibers is based on the total amount of about 10 to 25% and is preferably about 12.5%.
  • the blend of cross-crimps in this embodiment of the invention is 80% polyester fibers (PES) and 20% polypropylene melt fibers (PP) with PES 1.7 dtex at a fiber length substantially 38 mm and PP 2.2 dtex at a fiber length of substantially 40mm.
  • the blend of longitudinal carding may contain up to 100% PES, which has a fiber fineness of 1.7 dtex or 3.3 dtex and preferably 40% 1.7 dtex and 60% 3.3 dtex with substantially consistent fiber length in the range between 30 and 40mm exists.
  • the ratio of the mixtures Wienkrempel / Lekskrempel can be at 10: 1 - 1: 1, but expediently 5: 3.
  • a pressure of 60 to 80 bar can be set on a first solidification bar, a pressure of 110 to 130 bar in the case of a second solidification bar, and a pressure of 160 to 180 bar in the case of a third solidification bar, the specified ranges of values representing no absolute values Embodiment be the pressures from the first to the second to the third solidification bar 70 bar, 120 bar and 170 bar. These settings are almost identical for basis weights in the range of 55 to 95g / m 2 .
  • a staple fiber non-woven fabric is again formed from cross-laid pile, for which purpose a mixture of PES fibers with proportions of 1.7 dtex to 3.3 dtex is used.
  • a bonding agent for the film membrane layer a polyethylene scattering powder is used, which is applied on one side.
  • the PE scattered-powder coating is fixed and smoothed as part of a temperature-assisted compaction, ie pressure treatment.
  • the amount of polyethylene powder applied is in the range between 4 and 20 g / m 2 , preferably 6 to 10 g / m 2 .
  • the polyethylene scattering powder it is also possible to use comparable thermoplastics or thermally activatable, reactive adhesives with a particle size of 0-1,000 ⁇ m, preferably 100-500 ⁇ m.
  • the cross-laid batt may have specifying equipment in all embodiments.
  • the longitudinally laid batt has on one side a binder and / or pigment application.
  • a base web having a basis weight in the range of 50 to 90 g / m 2 is provided .
  • the base nonwoven fabric should have a very uniform weight distribution perpendicular to the direction of travel in order to ensure the desired dimensional stability or temperature passage during calendering.
  • the adhesion to the PE film membrane is triggered according to this embodiment via a proportion of PP melt fiber in the cross-laid pile.
  • the mixture in the Wienkrempel PES to PP is essentially 80:20 with a share PES 1.7 dtex, 38mm fiber length, and a proportion of PP 2.2 dtex at about 40mm fiber length.
  • the mixture in the longitudinal card is based on 100% PES, of which 40% PES 1.7 dtex 38mm fiber length and 60% 3.3 dtex at 38mm fiber length.
  • the ratios between mixture cross-paste and mixture longitudinal scrap are essentially 5: 3, so that there is an absolute proportion of PP in the amount of 12.5% with a share of 87.5% PES.
  • the maximum product temperature is limited by appropriate adjustment of the dryer at about 150 0 C.
  • Hardening at the crossing is done by a jet of water. Remaining residual moisture serves as a wetting agent and, in the case of foam application equipment, ensures a correspondingly homogeneous dyeing and binding application to the nonwoven surface.
  • the pressure for smoothing, d. H. the temperature-assisted compaction is driven with a maximum belt tension. Additional ionizing bars take unwanted electrical charges from the ground fleece surface.
  • the equipment is for example so that the longitudinal batt receives a binder application up to 10g / m 2 and a pigment application up to lg / m 2 one-sided on the top.
  • the temperature assisted densification of the nonwoven surface provides a low cost, hydrophobic surface.
  • the fiber mixture for both the Wienkrempel and for the longitudinal card of 100% PES fibers including a mixture of fibers 1.7 dtex and 3.3 dtex.
  • an inline scattering of a thermoplastic or thermally activatable reactive powder such.
  • the amount of adhesive to be applied is in the range of 4 to 20 g / m 2 , preferably 6 to 10 g / m 2 .
  • the applied powder is also subjected in this embodiment, a smoothing by temperature-assisted compaction, wherein the temperature for fixing and smoothing of the powder on the type and amount of PE powder used is dependent and PE foam, for example, about 150 ° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a base non-woven fibre for trilaminates, comprising a film membrane connected to the base non-woven fibre web and an outer layer arranged thereon. In a first embodiment the base non-woven fibre web is made up of a layered non-woven fibre web of cross-laid and lengthwise-laid fibres, wherein a mixture of polyester fibres and polypropylene fusion fibres are used and a temperature based compaction carried out to obtain a hydrophobic surface. In a further embodiment, the base non-woven fibre web is a layered non-woven fibre web of cross-laid fibres using a mixture of PES fibres with a single sided application of polyethylene powder as adhesive for the film membrane layer.

Description

Grundvlies für Trilaminate Basic fleece for trilaminates
Beschreibungdescription
Die Erfindung betrifft ein Grundvlies für Trilaminate, welche eine mit dem Grundvlies verbundene Folienmembran und eine darauf angeordnete Deckschicht aufweisen, gemäß Oberbegriff des Patentanspruchs 1.The invention relates to a base web for trilaminates which have a film membrane connected to the base web and a cover layer arranged thereon, according to the preamble of patent claim 1.
Mehrschichtfolien mit einstellbarer Wasserdampfdurchlässigkeit, insbesondere zur Abdichtung beim Hausbau im Dachbereich, sind als sogenannte Dachunterspannbahnen bekannt. Zum Stand der Technik sei hier beispielsweise auf die DE 199 11 280 Al, die DE 199 44 819 Al oder die DE 10 2005 038 863 Al verwiesen. Derartige Folien bestehen aus einer wasserdampfdurchlässigen Basisschicht aus einem ersten Kunststoffmaterial und zumindest einer mit der Basisschicht gekoppelten Wasserdampfdurchlässigkeits- kontrollierenden zweiten Schicht aus einem zweiten Kunststoffmaterial. Darüber hinaus kann eine dritte, als Deckschicht ausgebildete Lage vorhanden sein. Gemäß dem Gebrauchsmuster DE 297 00 987 U l ist eine diffusionsoffene Dachunterspannbahn mit innerer Folienschicht enthaltend einen mindestens dreilagigen Verbund mit äußeren Vliesschichten auf Basis von thermoplastischen Kunststoffen und einer inneren Folienschicht bekannt. Um Reißfestigkeiten zu erhöhen, ist in der zitierten Lehre vorgeschlagen worden, äußere Vliesschichten auf Basis von Polyesterfilamenten mit einem Flächengewicht von 30 bis 120g/m2 einzusetzen. Eine Festigkeitsverbesserung soll auch durch Einsatz von geprägten Vliesschichten ermöglicht werden.Multilayer films with adjustable water vapor permeability, in particular for sealing in house construction in the roof area, are known as so-called roof underlays. For the state of the art, reference is made here, for example, to DE 199 11 280 A1, DE 199 44 819 A1 or DE 10 2005 038 863 A1. Such films consist of a water vapor permeable base layer of a first plastic material and at least one coupled to the base layer Wasserdampfdurchlässigkeits- controlling second layer of a second plastic material. In addition, a third layer formed as a cover layer may be present. According to the utility model DE 297 00 987 U 1, a vapor-permeable roof underlay with an inner film layer containing an at least three-ply composite with outer nonwoven layers based on thermoplastic materials and an inner film layer is known. In order to increase tensile strength, it has been proposed in the cited teaching to use outer nonwoven layers based on polyester filaments with a basis weight of 30 to 120 g / m 2 . A strength improvement should also be made possible by the use of embossed nonwoven layers.
Um einen möglichst guten Verbund der Vliesschichten mit einer inneren Folienschicht durch Kaschierung unter Anwendung von Wärme und Druck zu erzielen, ist es gemäß dem erläuterten Stand der Technik von Vorteil, die Vliesschichten aus Endlosfilamenten nicht nur auf der Basis von Polypropylen oder Polyethylen allein, sondern in Verbindung mit einem geringen Gehalt von Ethylenvinylacetat-Copolymeren auszubilden.In order to achieve the best possible bonding of the nonwoven layers with an inner film layer by lamination using heat and pressure, it is advantageous according to the described prior art, the nonwoven layers of continuous filaments not only on the basis of polypropylene or polyethylene alone, but in Form a compound with a low content of ethylene-vinyl acetate copolymers.
Maßgeblich für die Qualität des letztendlich erhaltenen Trilaminats ist die Reproduzierbarkeit der Eigenschaften des Grundvliesstoffes. Bisher wurden diesbezüglich Spinnvliesstoffe eingesetzt. Die Herstellung von Spinnvlies- stoffen ist jedoch aufwendiger als diejenige von Wirrfaser-Vliesstoffen, die mit unterschiedlichen Methoden trocken oder nass bereitgestellt werden können. Üblicherweise werden Wirrfaser-Vliesstoffe durch Wirr- oder Stauchwalzen auf einer Krempel mit anschließender, z. B. Wasserverfestigung realisiert. Auch besteht die Möglichkeit, eine Faserorientierung durch Längs- oder Querlegen zu bewirken.Decisive for the quality of the trilaminate ultimately obtained is the reproducibility of the properties of the base nonwoven fabric. So far have been Spunbonded fabrics used in this regard. However, the production of spun-bonded nonwovens is more complicated than that of random-fiber nonwovens, which can be provided dry or wet with different methods. Usually, random fiber nonwovens are formed by random or compression rolls on a card with subsequent, z. B. water solidification realized. It is also possible to effect a fiber orientation by longitudinal or lateral laying.
Aus dem Vorgenannten ist es daher Aufgabe der Erfindung, ein weiterentwickeltes Grundvlies speziell für Trilaminate anzugeben, wobei die Trilami- nate eine mit dem Grundvlies verbundene Folienmembran und eine darauf anordenbare Deckschicht als Finalprodukt aufweisen.From the above, it is therefore an object of the invention to provide a further developed base fleece specifically for trilaminates, wherein the trilaminates have a membrane connected to the base fleece membrane and a cover layer can be arranged thereon as a final product.
Das zu schaffende Grundvlies soll kostengünstig und reproduzierbar hergestellt werden, wobei in einfacher Weise Mittel vorzusehen sind, die eine Haftung der aufzubringenden Folienmembran als Zwischenschicht des TrMa- minats gestatten.The base fleece to be created is to be produced in a cost-effective and reproducible manner, it being simple to provide means which permit adhesion of the film membrane to be applied as an intermediate layer of the trimanate.
Die Lösung der Aufgabe der Erfindung erfolgt gemäß einer ersten Ausführungsform gemäß der Merkmalskombination nach Patentanspruch 1 sowie einer zweiten Ausführungsform gemäß der Merkmalskombination nach Patentanspruch 8, wobei die Unteransprüche mindestens zweckmäßige Ausgestaltungen und Weiterbildungen umfassen.The solution of the object of the invention is carried out according to a first embodiment according to the combination of features according to claim 1 and a second embodiment according to the feature combination according to claim 8, wherein the dependent claims comprise at least expedient refinements and developments.
Der erfindungsgemäße Grundgedanke besteht darin, bisher genutzte Spinnvliesstoffe durch Stapelfaser-Vliesstoffe zu ersetzen, wobei die Mittel zum thermischen Fixieren der Folienmembran sparsam und nach Möglichkeit im eigentlichen Herstellungsprozess des Grundvlieses auf- bzw. eingebracht werden. Dadurch ist die gewünschte Atmungsaktivität und Dampfdurchlässigkeit des Grundvlieses auf jeden Fall sichergestellt und eine ausreichende Festigkeit, insbesondere in Querrichtung, gewährleistet.The basic idea of the invention is to replace hitherto used spun-bonded nonwovens by staple fiber nonwovens, wherein the means for thermally fixing the membrane of the membrane are applied sparingly and if possible in the actual production process of the base nonwoven. As a result, the desired breathability and vapor permeability of the base fabric is ensured in any case and sufficient strength, especially in the transverse direction, guaranteed.
Den erfindungsgemäßen Ausführungsvarianten ist gemein, dass das Stapelfaservlies aus einem kreuzgelegten und längsgelegten Flor gebildet ist und zum Erhalt einer hydrophoben Oberfläche eine temperaturunterstützte Verdichtung erfolgt.The embodiments of the invention is common that the staple fiber fleece is formed from a cross-laid and longitudinal pile and To obtain a hydrophobic surface, a temperature-assisted compaction takes place.
Gemäß der ersten Ausführungsform der Erfindung wird für die Bildung des kreuzgelegten Flors eine Mischung aus Polyesterfasern und Polypropylen- Schmelzfasern eingesetzt.According to the first embodiment of the invention, a mixture of polyester fibers and polypropylene melt fibers is used for the formation of the crossed pile.
Der Anteil an Polypropylen-Schmelzfasern beträgt bezogen auf die Gesamtmenge etwa 10 bis 25% und liegt bevorzugt bei ca. 12,5%.The proportion of polypropylene melt fibers is based on the total amount of about 10 to 25% and is preferably about 12.5%.
Die Mischung der Kreuzkrempel liegt bei dieser Ausführungsform der Erfindung bei 80% Polyesterfasern (PES) und 20% Polypropylen-Schmelzfasern (PP) mit PES 1,7 dtex bei einer Faserlänge im Wesentlichen 38mm sowie PP 2,2 dtex bei einer Faserlänge von im Wesentlichen 40mm.The blend of cross-crimps in this embodiment of the invention is 80% polyester fibers (PES) and 20% polypropylene melt fibers (PP) with PES 1.7 dtex at a fiber length substantially 38 mm and PP 2.2 dtex at a fiber length of substantially 40mm.
Die Mischung der Längskrempel kann bis zu 100 % PES enthalten, welches eines Faserfeinheit von 1,7 dtex oder 3,3 dtex aufweist und vorzugweise aus 40% 1,7 dtex und 60% 3,3 dtex bei im Wesentlichen übereinstimmender Faserlänge im Bereich zwischen 30 und 40mm besteht.The blend of longitudinal carding may contain up to 100% PES, which has a fiber fineness of 1.7 dtex or 3.3 dtex and preferably 40% 1.7 dtex and 60% 3.3 dtex with substantially consistent fiber length in the range between 30 and 40mm exists.
Das Verhältnis der Mischungen Kreuzkrempel / Längskrempel kann bei 10 : 1 - 1 : 1 liegen, zweckmäßigerweise jedoch bei 5 : 3.The ratio of the mixtures Kreuzkrempel / Längskrempel can be at 10: 1 - 1: 1, but expediently 5: 3.
Die vorerwähnte temperaturunterstützte Verdichtung zum Erhalt einer glatten Oberfläche erfolgt über mehrere Stufen mit steigenden Drücken. So kann an einem ersten Verfestigungsbalken ein Druck von 60 - 80 bar, bei einem zweiten Verfestigungsbalken ein Druck von 110 - 130 bar und bei einem dritten Verfestigungsbalken ein Druck von 160 - 180 bar eingestellt werden, wobei die angegebenen Wertebereiche keine Absolutwerte darstellen In einer bevorzugten Ausführungsform betragen die Drücke vom ersten über den zweiten bis zum dritten Verfestigungsbalken 70 bar, 120 bar und 170 bar. Diese Einstellungen sind bei Flächengewichten im Bereich von 55 bis 95g/m2 nahezu identisch. Bei dem Grundvlies gemäß der zweiten Ausführungsform wird wiederum ein Stapelfaservlies aus kreuzgelegtem Flor gebildet, wobei hierfür eine Mischung aus PES-Fasern mit Anteilen von 1,7 dtex bis 3,3 dtex eingesetzt wird. Als Haftmittel für die Folienmembranschicht kommt ein Polyethylen- Streupulver zum Einsatz, welches einseitig aufgebracht ist. Die PE-Streupul- verschicht wird im Rahmen einer temperaturunterstützten Verdichtung, d. h. Druckbehandlung fixiert und geglättet.The aforementioned temperature-assisted compaction to obtain a smooth surface occurs over several stages of increasing pressures. Thus, a pressure of 60 to 80 bar can be set on a first solidification bar, a pressure of 110 to 130 bar in the case of a second solidification bar, and a pressure of 160 to 180 bar in the case of a third solidification bar, the specified ranges of values representing no absolute values Embodiment be the pressures from the first to the second to the third solidification bar 70 bar, 120 bar and 170 bar. These settings are almost identical for basis weights in the range of 55 to 95g / m 2 . In the base fabric according to the second embodiment, a staple fiber non-woven fabric is again formed from cross-laid pile, for which purpose a mixture of PES fibers with proportions of 1.7 dtex to 3.3 dtex is used. As a bonding agent for the film membrane layer, a polyethylene scattering powder is used, which is applied on one side. The PE scattered-powder coating is fixed and smoothed as part of a temperature-assisted compaction, ie pressure treatment.
Die aufgebrachte Polyethylen-Streupulvermenge liegt im Bereich zwischen 4 und 20 g/m2, vorzugsweise bei 6 - 10 g/m2. Anstelle des Polyethylen-Streu- pulvers können auch vergleichbare Thermoplaste oder thermisch aktivierbare, reaktive Kleber bei einer Korngröße von 0 - 1.000 μm, vorzugsweise 100 - 500 μm verwendet werden.The amount of polyethylene powder applied is in the range between 4 and 20 g / m 2 , preferably 6 to 10 g / m 2 . Instead of the polyethylene scattering powder, it is also possible to use comparable thermoplastics or thermally activatable, reactive adhesives with a particle size of 0-1,000 μm, preferably 100-500 μm.
Der kreuzgelegte Faserflor kann bei allen Ausführungsformen eine spezifizierende Ausrüstung aufweisen.The cross-laid batt may have specifying equipment in all embodiments.
Insbesondere der längsgelegte Faserflor weist einseitig einen Binder- und/oder Pigmentauftrag auf.In particular, the longitudinally laid batt has on one side a binder and / or pigment application.
Die Erfindung soll nachstehend anhand von Ausführungsbeispielen näher erläutert werden.The invention will be explained below with reference to exemplary embodiments.
Gemäß einem ersten Ausführungsbeispiel wird ein Grundvlies mit einem Flächengewicht im Bereich von 50 bis 90 g/m2 geschaffen.According to a first embodiment, a base web having a basis weight in the range of 50 to 90 g / m 2 is provided .
Der Grundvliesstoff sollte eine sehr gleichmäßige Gewichtsverteilung senkrecht zur Laufrichtung aufweisen, um die gewünschte Dimensionsstabilität bzw. den Temperaturdurchgang beim Kalandrieren zu gewährleisten.The base nonwoven fabric should have a very uniform weight distribution perpendicular to the direction of travel in order to ensure the desired dimensional stability or temperature passage during calendering.
Die Haftung zur PE-Folienmembran wird gemäß diesem Ausführungsbeispiel über einen Anteil von PP-Schmelzfaser im kreuzgelegten Flor ausgelöst. Die Mischung in der Kreuzkrempel PES zu PP beträgt im Wesentlichen 80 : 20 mit einem Anteil PES 1,7 dtex, 38mm Faserlänge, und einem Anteil PP 2,2 dtex bei ca. 40mm Faserlänge.The adhesion to the PE film membrane is triggered according to this embodiment via a proportion of PP melt fiber in the cross-laid pile. The mixture in the Kreuzkrempel PES to PP is essentially 80:20 with a share PES 1.7 dtex, 38mm fiber length, and a proportion of PP 2.2 dtex at about 40mm fiber length.
Die Mischung in der Längskrempel geht von 100% PES aus, davon 40% PES 1,7 dtex 38mm Faserlänge und 60% 3,3 dtex bei 38mm Faserlänge.The mixture in the longitudinal card is based on 100% PES, of which 40% PES 1.7 dtex 38mm fiber length and 60% 3.3 dtex at 38mm fiber length.
Die Verhältnisse zwischen Mischung Kreuzkrempel und Mischung Längskrempel liegen bei im Wesentlichen 5 :3, so dass sich ein absoluter Anteil von PP in Höhe von 12,5% bei einem Anteil von 87,5% PES ergibt.The ratios between mixture cross-paste and mixture longitudinal scrap are essentially 5: 3, so that there is an absolute proportion of PP in the amount of 12.5% with a share of 87.5% PES.
Eine Verbesserung der Haftung der Folienmembran ist bei einer Verdoppelung der PP-Menge auf absolut 25% möglich.An improvement in the adhesion of the film membrane is possible with a doubling of the PP amount to a total of 25%.
Um ein Auslösen der PP-Schmelzfaser zu verhindern, wird die maximale Warentemperatur durch entsprechende Einstellung der Trockner auf ca. 150 0C begrenzt.In order to prevent a triggering of the PP-melt fiber, the maximum product temperature is limited by appropriate adjustment of the dryer at about 150 0 C.
Die Verfestigung bei der Kreuzlegung erfolgt durch einen Wasserstrahl . Zurückbleibende Restfeuchte dient als Netzmittel und sorgt bei Schaumapplika- tions-Ausrüstung für einen entsprechend homogenen Färb- und Binderauftrag auf die Vliesoberfläche. Der Druck zum Glätten, d. h. der temperaturunterstützte Verdichtung wird mit einer maximalen Bandspannung gefahren. Zusätzliche Ionisierungsstäbe nehmen unerwünschte elektrische Aufladungen von der Grundvliesoberfläche.Hardening at the crossing is done by a jet of water. Remaining residual moisture serves as a wetting agent and, in the case of foam application equipment, ensures a correspondingly homogeneous dyeing and binding application to the nonwoven surface. The pressure for smoothing, d. H. the temperature-assisted compaction is driven with a maximum belt tension. Additional ionizing bars take unwanted electrical charges from the ground fleece surface.
Die Ausrüstung erfolgt beispielsweise so, dass der längsgelegte Faserflor einen Binderauftrag bis zu 10g/m2 und einen Pigmentauftrag bis zu lg/m2 einseitig auf der Oberseite erhält. Die temperaturunterstützte Verdichtung der Vliesoberfläche schafft eine kostengünstige, hydrophobe Oberfläche.The equipment is for example so that the longitudinal batt receives a binder application up to 10g / m 2 and a pigment application up to lg / m 2 one-sided on the top. The temperature assisted densification of the nonwoven surface provides a low cost, hydrophobic surface.
Bei einem zweiten Ausführungsbeispiel der Erfindung besteht die Fasermischung sowohl für die Kreuzkrempel als auch für die Längskrempel aus 100% PES-Fasern, hierunter eine Mischung von Fasern 1,7 dtex und 3,3 dtex. Um die notwendige Haftung der Folienmembran zu gewährleisten, erfolgt eine Inline-Streuung eines thermoplastischen oder thermisch aktivierbarem reaktiven Pulvers wie z. B. eines PE-Pulvers mit Schmelzpunkt 110 0C und M FI < 100. Die Menge des aufzubringenden Haftmittels liegt im Bereich von 4 bis 20 g/m2, vorzugsweise bei 6 - 10 g/m2.In a second embodiment of the invention, the fiber mixture for both the Kreuzkrempel and for the longitudinal card of 100% PES fibers, including a mixture of fibers 1.7 dtex and 3.3 dtex. In order to ensure the necessary adhesion of the film membrane, an inline scattering of a thermoplastic or thermally activatable reactive powder such. B. a PE powder with melting point 110 0 C and M FI <100. The amount of adhesive to be applied is in the range of 4 to 20 g / m 2 , preferably 6 to 10 g / m 2 .
Das aufgebrachte Pulver wird auch bei diesem Ausführungsbeispiel einer Glättung durch temperaturunterstützte Verdichtung unterzogen, wobei die Temperatur zum Fixieren und Glätten des Pulvers von der Art und Menge des verwendeten PE-Pulvers abhängig ist und bei PE-Schaum beispielsweise ca. 150 ° C beträgt. The applied powder is also subjected in this embodiment, a smoothing by temperature-assisted compaction, wherein the temperature for fixing and smoothing of the powder on the type and amount of PE powder used is dependent and PE foam, for example, about 150 ° C.

Claims

Patentansprüche claims
1. Grundvlies für Trilaminate, welche eine mit dem Grundvlies verbundene Folienmembran und eine darauf angeordnete Deckschicht aufweisen, dadurch gekennzeichnet, dass als Grundvlies ein Stapelfaservlies aus kreuzgelegtem und längsgelegtem Flor gebildet ist, wobei hierfür eine Mischung aus Polyesterfasern und Polypropylen-Schmelzfasern eingesetzt wird und weiterhin zum Erhalt einer hydrophoben Oberfläche eine temperaturunterstützte Verdichtung und Glättung erfolgt.1. base fleece for trilaminates, which have a bonded to the base fabric membrane and a cover layer disposed thereon, characterized in that as a base fleece staple fiber fleece of cross-laid and longitudinal pile is formed, for which purpose a mixture of polyester fibers and polypropylene melt fibers is used and continue To obtain a hydrophobic surface, a temperature-assisted compaction and smoothing takes place.
2. Grundvlies nach Anspruch 1, dadurch gekennzeichnet, dass der Anteil der Polypropylen(PP)-Schmelzfasern bezogen auf die Gesamtmischung bei 10% bis 25%, bevorzugt bei 12,5% liegt.2. Base fabric according to claim 1, characterized in that the proportion of polypropylene (PP) melt fibers based on the total mixture at 10% to 25%, preferably 12.5%.
3. Grundvlies nach Anspruch 1, dadurch gekennzeichnet, dass die Mischung der Kreuzkrempel bei 80% Polyesterfasern (PES) und 20% PP mit PES 1,7 dtex, Faserlänge im Wesentlichen 38mm, sowie PP 2,2 dtex, Faserlänge im Wesentlichen 40mm liegt.3. base fleece according to claim 1, characterized in that the mixture of Kreuzkrempel at 80% polyester fibers (PES) and 20% PP with PES 1.7 dtex, fiber length is substantially 38mm, and PP 2.2 dtex, fiber length is substantially 40mm ,
4. Grundvlies nach Anspruch 3, dadurch gekennzeichnet, dass die Mischung der Längskrempel 100 % PES enthält und eine Faserfeinheit von 1,7 dtex oder 3,3 dtex aufweist.4. ground fleece according to claim 3, characterized in that the mixture of the longitudinal card contains 100% PES and has a fiber fineness of 1.7 dtex or 3.3 dtex.
5. Grundvlies nach Anspruch 4, dadurch gekennzeichnet, dass die Mischung der Längskrempel aus 40% 1,7 dtex und 60% 3,3 dtex besteht. 5. ground fleece according to claim 4, characterized in that the mixture of the longitudinal card consists of 40% 1.7 dtex and 60% 3.3 dtex.
6. Grundvlies nach Anspruch 3, 4 oder 5, dadurch gekennzeichnet, dass dass Verhältnis der Mischungen Kreuzkrempel / Längskrempel bei 10 : 1 -1 : 10 liegt.6. base fleece according to claim 3, 4 or 5, characterized in that the ratio of the mixtures Kreuzkrempel / Längskrempel at 10: 1-1: 10.
7. Grundvlies nach Anspruch 3, 4, 5 oder 6, dadurch gekennzeichnet, dass das Verhältnis der Mischungen Kreuzkrempel / Längskrempel bei ca. 5 : 3 liegt.7. ground fleece according to claim 3, 4, 5 or 6, characterized in that the ratio of the mixtures Kreuzkrempel / Längskrempel is about 5: 3.
8. Grundvlies nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die temperaturunterstützte Verdichtung über mehrere Stufen bei steigenden Drücken erfolgt.8. ground fleece according to one of the preceding claims, characterized in that the temperature-assisted compression takes place over several stages with increasing pressures.
9. Grundvlies nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass über den PP-Schmelzfaseranteil im kreuzgelegtem Faserflor eine Verbindung zur Folienmembran des Trilaminats realisierbar ist.9. ground fleece according to one of the preceding claims, characterized in that on the PP melt fiber content in cross-laid batt a connection to the film membrane of the trilaminate can be realized.
10. Grundvlies für Trilaminate, welche eine mit dem Grundvlies verbundene Folienmembran und eine darauf angeordnete Deckschicht aufweisen, dadurch gekennzeichnet, dass als Grundvlies ein Stapelfaservlies aus kreuzgelegtem und längsgelegtem Flor gebildet ist, wobei hierfür eine Mischung aus Polyesterfasern mit Anteilen von 1,7 dtex bis 3,3 dtex eingesetzt wird und als Haftmittel für die Folien- membranschicht Polyethylen-Streupulver einseitig aufgebracht ist und die Polyethylen-Streupulverschicht durch temperaturunterstützte Verdichtung fixiert und geglättet ist.10. Basic nonwoven for trilaminates, which have a membrane connected to the base fabric and a cover layer arranged thereon, characterized in that a staple fiber fleece of cross-laid and longitudinal pile is formed as the base fleece, wherein for this purpose a mixture of polyester fibers with fractions of 1.7 dtex to 3.3 dtex is used and is applied as an adhesive for the film membrane layer of polyethylene scattering powder on one side and the polyethylene scattering powder layer is fixed and smoothed by temperature-assisted compaction.
11. Grundvlies nach Anspruch 10, dadurch gekennzeichnet, dass die aufgebrachte Polyethylen-Streupulvermenge bei 4g/m2 bis 20 g/m2 liegt. 11. ground fleece according to claim 10, characterized in that the applied amount of polyethylene Streupulvermenge is 4g / m 2 to 20 g / m 2 .
12. Grundvlies nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass der kreuzgelegte Faserflor eine Ausrüstung aufweist.12. Basic fleece according to one of the preceding claims, characterized in that the cross-laid Faserflor has an equipment.
13. Grundvlies nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der längsgelegte Faserflor einen einseitigen Binder- und/oder Pigmentauftrag aufweist. 13 base fleece according to one of claims 1 to 9, characterized in that the longitudinal fibrous web has a one-sided binder and / or pigment application.
EP08785952A 2007-08-22 2008-07-07 Base non-woven fibre for trilaminates Not-in-force EP2183419B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007039771 2007-08-22
DE102008024944.0A DE102008024944B4 (en) 2007-08-22 2008-05-23 Basic fleece for trilaminates
PCT/EP2008/058771 WO2009024396A1 (en) 2007-08-22 2008-07-07 Base non-woven fibre for trilaminates

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EP2183419A1 true EP2183419A1 (en) 2010-05-12
EP2183419B1 EP2183419B1 (en) 2012-09-12

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DE102008024944A1 (en) 2009-02-26
DE102008024944B4 (en) 2018-05-09
WO2009024396A1 (en) 2009-02-26

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