EP0727517A1 - Process for manufacturing bonded non-woven material, bonded non-woven material made by this process and use thereof - Google Patents

Process for manufacturing bonded non-woven material, bonded non-woven material made by this process and use thereof Download PDF

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Publication number
EP0727517A1
EP0727517A1 EP96100302A EP96100302A EP0727517A1 EP 0727517 A1 EP0727517 A1 EP 0727517A1 EP 96100302 A EP96100302 A EP 96100302A EP 96100302 A EP96100302 A EP 96100302A EP 0727517 A1 EP0727517 A1 EP 0727517A1
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Prior art keywords
fibers
nonwoven fabric
production method
consolidated
bar
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EP96100302A
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German (de)
French (fr)
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EP0727517B1 (en
Inventor
Gerold Fleissner
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Truetzschler Nonwovens GmbH
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Fleissner GmbH
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Priority claimed from DE19500669A external-priority patent/DE19500669A1/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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • 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)

Abstract

A process is claimed for consolidating a fibre web made of synthetic staple fibres, e.g. polyester, polyethylene or polypropylene fibres, or of continuous fibres that are up to 10 mm thick and consist of pure man-made fibres without binding fibres or special melt fibres. The web is consolidated by means of a single water needling process at a water pressure of no more than 60 bar, pref. 20-30 bar.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Verfestigung eines Faservlieses aus künstlichen Stapelfasern, wie Polyester- Polyätylen- oder Polypropylenfasern oder auch aus solchen Endlosfasern, das in einer Dicke von bis zu 10 mm und mehr aus reinen Chemiefasern ohne Bindefasern, wie Bikomponenten- oder speziellen Schmelzfasern, und ohne Bindemitteln oder auch vermischt mit Naturfasern hergestellt wird.The invention relates to a method for consolidating a nonwoven fabric made of artificial staple fibers, such as polyester, polyethylene or polypropylene fibers or also of such continuous fibers, which is up to 10 mm thick and more from pure synthetic fibers without binding fibers, such as bicomponent or special Melting fibers, and without binders or mixed with natural fibers.

Krempelfaservliese werden aus Fasem der unterschiedlichsten Art hergestellt. Ganz allgemein haben sie den Vorteil, daß die Kurzfasern im fertigen Vlies wirr durcheinander liegen und deshalb dem Vlies eine bessere Festigkeit in allen Zugrichtungen verleihen. Daneben gibt es Vliese aus Endlosfasern, die nach der Herstellung der Fasern unmittelbar zu einem Vlies z. B. auf ein Endlosband abgelegt werden. Die im von der Krempelmaschine gelieferten Vlies locker verlegten Fasern und auch die eines Spinnvlieses müssen aber zur Herstellung einer in der Praxis befriedigenden Festigkeit miteinander verbunden werden. Dazu ist es bekannt, das Vlies mechanisch zu vernadeln. Durch diesen im Grunde diskontinuierlichen und damit langsamen Verfestigungsvorgang wird das Volumen aber wesentlich vermindert, so daß ein solches mechanisch verfestigtes Nadelvlies für so manche Verwendungsmöglichkeiten nicht brauchbar ist. Außerdem sind dünne Vliese mechnisch gar nicht zu vernadeln.Carded fiber fleeces are made from a wide variety of fibers. In general, they have the advantage that the short fibers in the finished nonwoven are confused and therefore give the nonwoven better strength in all directions of pull. In addition, there are nonwovens made from continuous fibers, which, after the fibers have been produced, immediately form a nonwoven z. B. stored on an endless belt. The fibers laid loosely in the nonwoven supplied by the carding machine and also those of a spunbonded nonwoven must be connected to one another in order to produce a strength that is satisfactory in practice. For this purpose, it is known to mechanically needle the fleece. Due to this essentially discontinuous and thus slow consolidation process, however, the volume is significantly reduced, so that such a mechanically consolidated needle felt is not usable for many possible uses. In addition, thin nonwovens cannot be needle-punched mechanically.

Es ist weiterhin bekannt, den Fasern Bindemittel beizugeben, z. B. flüssig durch Aufsprühen oder mittels Schaumimprägnierung. Der Nachteil eines solchen Vlieses ist nicht nur die zusätzlich notwendige teure Chemikalie, die nur mit einer gewissen Umweltbelastung hergestellt werden kann, sondern auch die schlechtere Recyclfähigkeit.It is also known to add binders to the fibers, e.g. B. liquid by spraying or by means of foam impregnation. The disadvantage of such a fleece is not only the additionally required expensive chemical, which can only be produced with a certain environmental impact, but also the poorer recyclability.

Weiterhin ist es bekannt, den Vliesen Fasern niedriger schmelzende Chemiefasern wie auch Bikomponentenfasern beizumischen, die dann durch Wärmeeinwirkung zumindest angeschmolzen werden, damit sie mit den benachbarten Fasern des Vlieses verkleben. Hierbei sind die teuren Bindefasern und der zusätzlich notwendige Energieaufwand beim Erhitzen bis auf die Schmelztemperatur der Bindefasern von Nachteil.Furthermore, it is known to add low-melting chemical fibers as well as bicomponent fibers to the nonwovens, which are then at least melted by the action of heat so that they adhere to the adjacent fibers of the nonwoven. The expensive binding fibers and the additional energy required when heating up to the melting temperature of the binding fibers are disadvantageous.

Es ist weiterhin bekannt, die Vliese der genannten Art mittels Wasser zu vernadeln. Die Wasservernadelung hat grundsätzlich den Vorteil, daß es kontinuierlich erfolgt, also höhere Produktionsgeschwindigkeiten möglich sind. Nachteilig sind jedoch die bei der Wasservernadelung entstehenden brettigen, papierähnlichen Produkte.It is also known to needled the nonwovens of the type mentioned by means of water. Basically, water needling has the advantage that it takes place continuously, so higher production speeds are possible. However, the board-like, paper-like products that result from water needling are disadvantageous.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung eines verfestigten voluminösen Vlieses, wie Krempelfaser- oder Spinnfaservlies, zu entwickeln, bei dem zur Verfestigung keine zusätzlichen Bindechemikalien oder Bindefasern notwendig sind und dennoch die erforderliche Festigkeit auch bei diesem voluminösen Vlies erzielt wird.The invention has for its object to develop a method for producing a solidified voluminous nonwoven, such as carded fiber or spunbonded nonwoven, in which no additional binding chemicals or binding fibers are required for consolidation and nevertheless the required strength is achieved even with this voluminous nonwoven.

Ausgehend von dem Verfahren anfangs genannter Art, wird die Lösung dieser Aufgabe darin gesehen, daß das Vlies allein mittels einer einmaligen Wasservernadelung mit nur einem Wasserdruck von bis zu höchstens 60 bar, vorzugsweise 20 - 30 bar verfestigt wird.Starting from the method mentioned at the beginning, the solution to this problem is seen in that the nonwoven is solidified by means of a single needling with only a water pressure of up to at most 60 bar, preferably 20-30 bar.

Es hat sich überraschend gezeigt, daß das Vlies - so wie es von der Krempel oder von den Spinnbalken nach Ablage geliefert wird - zwar beim Wasservernadeln mit diesem Wasserdruck an Volumen verliert, aber nur unbedeutend wenig. Jedenfalls verfilzen die Fasern durch das Auftreffen der Wasserstrahlen mit dem geringen Wasserdruck derart, daß ein ausreichend verfestigtes Vlies von der nur einen Wasservernadelungsmaschine geliefert wird, um industriell verwendet werden zu können. Dabei kann es von Vorteil sein, wenn vor der eigentlichen Wasservernadelung, das Vlies mit Wasser zur Befeuchtung unter Druck beblasen wird. Die Feuchtigkeit kann anschließend leicht aus dem Vlies abgesaugt und evtl. auch durch Wärme entfernt werden. Wegen des großen Volumens ist nur wenig Energie zur Herstellung des trockenen Vlieses notwendig.It has surprisingly been found that the fleece - as it is supplied by the card or from the spinning beam after storage - loses volume when needling with this water pressure, but only insignificantly. In any case, the fibers become matted by the impact of the water jets with the low water pressure in such a way that a sufficiently consolidated fleece is supplied by the only one water needling machine in order to be able to be used industrially. It can be advantageous if the fleece is blown with water for moistening under pressure before the actual water needling. The moisture can then easily be sucked out of the fleece and possibly also be removed by heat. Because of the large volume, little energy is required to produce the dry fleece.

Dieses wasservernadelte, voluminöse Vlies ist als Produkt ebenfalls Gegenstand dieser Erfindung. Dies gilt auch für die erfindungsgemäße Verwendung. Es wird auf die Patentansprüche verwiesen.This water needled, voluminous nonwoven is also a product of this invention. This also applies to the use according to the invention. Reference is made to the claims.

Dieses Verfahren zur Herstellung eines verfestigten voluminösen Vlieses ist zunächst nur auf die eine Seite des Vlieses angewendet. Die Rückseite (Unterstützungsseite) hat nach der Verfestigungsbehandlung eine andere Oberflächenstruktur. Sollen beide Seiten gleich strukturiert und oberflächenbehandelt sein, so ist selbstverständlich auch die andere Seite des Vlieses einer weiteren Wasservernadelungsmaschine zuzuführen. Dies hat aber mit dem grundsätzlichen Verfahren der einmaligen Behandlung nichts zu tun. Beim beidseitigen Vernadeln wird ein anderes Produkt gewünscht, das aber auch unter den Schutzumfang des Patents fällt.This process for producing a solidified, voluminous nonwoven is initially only applied to one side of the nonwoven. The back (support side) has a different surface structure after the hardening treatment. If both sides are to have the same structure and surface treatment, the other side of the fleece must of course also be fed to another water needling machine. However, this has nothing to do with the basic single treatment procedure. A different product is required for double-sided needling, but this also falls under the scope of protection of the patent.

Claims (11)

Verfahren zur Verfestigung eines Faservlieses aus künstlichen Stapelfasern, wie Polyester- Polyätylen- oder Polypropylenfasern, oder auch aus solchen Endlosfasern, das in einer Dicke von bis zu 10 mm und mehr aus reinen Chemiefasern ohne Bindefasern, wie Bikomponenten- oder speziellen Schmelzfasern, und ohne Bindemitteln oder auch vermischt mit Naturfasern hergestellt wird, dadurch gekennzeichnet, daß das Vlies allein mittels einer einmaligen Wasservernadelung mit nur einem Wasserdruck von bis zu höchstens 60 bar, vorzugsweise 20 - 30 bar verfestigt wird.Process for the consolidation of a nonwoven fabric made of artificial staple fibers, such as polyester, polyethylene or polypropylene fibers, or also of such continuous fibers, which in a thickness of up to 10 mm and more, consists of pure chemical fibers without binding fibers, such as bicomponent or special melt fibers, and without binders or also mixed with natural fibers, characterized in that the fleece is solidified solely by means of a single needling of water with only a water pressure of up to at most 60 bar, preferably 20-30 bar. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß es bei einer beidseitig gleichen Oberflächenstrktur des Vlieses zweifach durchgeführt wird, und zwar nacheinander auch auf der Rückseite des Vlieses.A method according to claim 1, characterized in that it is carried out twice with a surface structure of the fleece which is the same on both sides, and in succession also on the back of the fleece. Faservlies aus künstlichen Stapelfasern, wie Polyester- Polyätylen- oder Polypropylenfasern, oder auch aus solchen Endlosfasern, das in einer Dicke von bis zu 10 mm und mehr aus reinen Chemiefasern ohne Bindefasern, wie Bikomponenten- oder speziellen Schmelzfasern, und ohne Bindemitteln oder auch vermischt mit Naturfasern hergestellt und mittels eines einseitig einmaligen Wasservernadelungsverfahrens mit nur einem Wasserdruck von bis zu höchstens 60 bar, vorzugsweise 20 - 30 bar verfestigt ist.Nonwoven fabric made of artificial staple fibers, such as polyester, polyethylene or polypropylene fibers, or also of such continuous fibers, which in a thickness of up to 10 mm and more consists of pure chemical fibers without binding fibers, such as bicomponent or special melt fibers, and without binders or also mixed with Natural fibers produced and solidified by means of a one-sided water needling process with only a water pressure of up to a maximum of 60 bar, preferably 20-30 bar. Faservlies, das nach der Herstellungsart gemäß Anspruch 1 oder 2 verfestigt ist und dessen Fasern einen Titer von 1 - 15 den aufweisen.Nonwoven fabric, which is consolidated according to the production method according to claim 1 or 2 and whose fibers have a titer of 1-15 den. Faservlies, das nach der Herstellungsart gemäß Anspruch 1 oder 2 verfestigt ist und dessen Fasern bei Verwendung von Stapelfasern eine Stapellänge von 36 - 75 mm oder länger aufweisenNonwoven fabric, which is consolidated according to the production method according to claim 1 or 2 and whose fibers have a staple length of 36-75 mm or longer when using staple fibers Faservlies, das nach der Herstellungsart gemäß Anspruch 1 oder 2 verfestigt ist und ein Gewicht von bis zu 200 g/m2 aufweist.Nonwoven fabric, which is consolidated according to the production method according to claim 1 or 2 and has a weight of up to 200 g / m 2 . Faservlies, das nach der Herstellungsart gemäß Anspruch 1 oder 2 verfestigt ist und eine Dichte von bis zu 0,05 g/cm3, vorzugsweise 0,01 -0,03 g/cm3 aufweistNonwoven fabric, which is consolidated according to the production method according to claim 1 or 2 and has a density of up to 0.05 g / cm 3 , preferably 0.01-0.03 g / cm 3 Faservlies, das nach der Herstellungsart gemäß Anspruch 1 oder 2 verfestigt ist und eine Reißfestigkeit von 5 - 300 N/5 cm, vorzugsweise 10 - 300 N/5 cm aufweist.Nonwoven fabric, which is consolidated according to the production method according to claim 1 or 2 and has a tensile strength of 5 - 300 N / 5 cm, preferably 10 - 300 N / 5 cm. Verwendung des Faservlieses, das nach der Herstellungsart gemäß Anspruch 1 oder 2 verfestigt ist, als Dochtschicht im Hygiene- oder Sanitärbereich.Use of the nonwoven fabric, which is consolidated according to the method of manufacture according to claim 1 or 2, as a wick layer in the hygiene or sanitary area. Verwendung des Faservlieses, das nach der Herstellungsart gemäß Anspruch 1 oder 2 verfestigt ist, als Filterprodukt.Use of the nonwoven fabric, which is consolidated according to the production method according to claim 1 or 2, as a filter product. Verwendung des Faservlieses, das nach der Herstellungsart gemäß Anspruch 1 oder 2 verfestigt ist, als Watteprodukt in der Kleiderindustrie.Use of the nonwoven fabric, which is consolidated according to the production method according to claim 1 or 2, as a cotton product in the clothing industry.
EP19960100302 1995-01-12 1996-01-11 Process for manufacturing bonded non-woven material, bonded non-woven material made by this process and use thereof Expired - Lifetime EP0727517B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19500669 1995-01-12
DE19500669A DE19500669A1 (en) 1994-12-22 1995-01-12 Consolidating fibre web made of synthetic staple fibres

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EP0727517A1 true EP0727517A1 (en) 1996-08-21
EP0727517B1 EP0727517B1 (en) 2000-04-12

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JP (1) JPH08232147A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116901554A (en) * 2023-07-01 2023-10-20 东莞市威骏不织布有限公司 Composite moisturizing cloth and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0321237A2 (en) * 1987-12-16 1989-06-21 Asahi Kasei Kogyo Kabushiki Kaisha High strength wet-laid nonwoven fabric and process for producing same
EP0333210A2 (en) * 1988-03-18 1989-09-20 Kimberly-Clark Corporation Bonded nonwoven material, method and apparatus for producing the same
US4868958A (en) * 1985-11-20 1989-09-26 Uni-Charm Corporation Backing drum
EP0468799A1 (en) * 1990-07-26 1992-01-29 JOHNSON & JOHNSON INC. Low fluid pressure dual-sided fiber entanglement method, apparatus and resulting product

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4868958A (en) * 1985-11-20 1989-09-26 Uni-Charm Corporation Backing drum
EP0321237A2 (en) * 1987-12-16 1989-06-21 Asahi Kasei Kogyo Kabushiki Kaisha High strength wet-laid nonwoven fabric and process for producing same
EP0333210A2 (en) * 1988-03-18 1989-09-20 Kimberly-Clark Corporation Bonded nonwoven material, method and apparatus for producing the same
EP0468799A1 (en) * 1990-07-26 1992-01-29 JOHNSON & JOHNSON INC. Low fluid pressure dual-sided fiber entanglement method, apparatus and resulting product

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116901554A (en) * 2023-07-01 2023-10-20 东莞市威骏不织布有限公司 Composite moisturizing cloth and preparation method thereof
CN116901554B (en) * 2023-07-01 2024-03-19 广东一农新材料科技有限公司 Composite moisturizing cloth and preparation method thereof

Also Published As

Publication number Publication date
JPH08232147A (en) 1996-09-10
EP0727517B1 (en) 2000-04-12

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