WO2006024508A2 - Method and device for compacting a web of endless fabric comprising a nonwoven - Google Patents

Method and device for compacting a web of endless fabric comprising a nonwoven Download PDF

Info

Publication number
WO2006024508A2
WO2006024508A2 PCT/EP2005/009361 EP2005009361W WO2006024508A2 WO 2006024508 A2 WO2006024508 A2 WO 2006024508A2 EP 2005009361 W EP2005009361 W EP 2005009361W WO 2006024508 A2 WO2006024508 A2 WO 2006024508A2
Authority
WO
WIPO (PCT)
Prior art keywords
web
liquid
squeezing
nonwoven
endless fabric
Prior art date
Application number
PCT/EP2005/009361
Other languages
German (de)
French (fr)
Other versions
WO2006024508A3 (en
Inventor
Achim Wandke
Carsten Rant
Adamo Di Sinno
Original Assignee
Andritz Küsters GmbH & Co. KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Andritz Küsters GmbH & Co. KG filed Critical Andritz Küsters GmbH & Co. KG
Priority to EP05776628A priority Critical patent/EP1784532A2/en
Priority to US11/661,949 priority patent/US20080110590A1/en
Publication of WO2006024508A2 publication Critical patent/WO2006024508A2/en
Publication of WO2006024508A3 publication Critical patent/WO2006024508A3/en

Links

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
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets

Definitions

  • the invention relates to a method and a device for solidifying a fabric web comprising a nonwoven.
  • web comprising a web
  • this also means webs that consist entirely of nonwoven.
  • a nonwoven is a textile fabric that consists of filaments that are thermally, chemically or mechanically bonded together.
  • Mechanical hardening involves the known method of hydroentanglement, in which water jets are supplied under pressure to at least one surface of the web and cause compacting of the web.
  • the fleece After the water jet application step, it is necessary to dry the nonwoven fabric.
  • the fleece After the water jet application step, it is necessary to dry the nonwoven fabric.
  • the fleece then a suction device, by means of which water is sucked off, and finally a dryer in which the evaporation of befindaji in the web residual liquid is supplied to feed.
  • the processing step of drying in the dryer is energy intensive.
  • the invention is therefore based on the object, a Ver ⁇ drive and a device for solidifying a web comprising a web to create, the energy consumption is lowered.
  • the method according to the invention provides for squeezing out liquid from the already consolidated nonwoven web before the step of drying.
  • the liquid squeezing step according to the invention can be used instead of the previously used siphoning.
  • superfluous liquid is also sucked off prior to squeezing, as this increases the effectiveness of the squeezing operation and allows a web of lesser residual moisture to be fed to the drying process.
  • a particularly gentle drying process is effected by suction before squeezing. This is explained by lower cross flows of the liquid during the Abquetschschrit- tes, since due to the lower residual moisture only smaller remplisstechniks ⁇ keitsmengen per unit time must emerge from the web.
  • the liquid used is preferably water. Although it is conceivable to use other liquids which are more readily volatile, for example at room temperature, to solidify the nonwoven, preference is furthermore given to using water, since this is the most economical and no problems with the provision and / or disposal prepares.
  • the apparatus for using the method according to the invention comprises a device by means of which pressurized liquid can be fed to the fabric web, a squeezing device connected downstream of the device by means of which liquid can be squeezed off the web, and a dryer for drying the material web.
  • the web is fed in this apparatus continuously from the solidification device via the squeezing the dryer, wherein after passing through the squeezing the web has such a low residual moisture that the required for effecting the drying process by the dryer e- nergiemenge is reduced.
  • the device additionally comprises a suction for sucking excess liquid, which - seen in the feed direction of the web - is connected upstream of the squeezing.
  • the apparatus designated as a whole by 100 comprises a securing device 1.
  • the latter has a drum 2 about which a web B comprising the web to be consolidated is guided through approximately 220 °.
  • nozzles 3 are arranged, by means of which water jets 4 are supplied under pressure in the direction of the normal of the web B.
  • the web B After circulating the drum 2, the web B is guided by an endlessly around deflecting rollers 5, 6, 7 with the advance speed of the web recirculating belt 8.
  • a suction device 9 vorge ⁇ In the area in which the web B rests against the screen belt 8, on the web B opposite side of the screen belt 8 see a suction device 9 vorge ⁇ . It comprises a suction bar 10 which can be pressurized with negative pressure and which comprises a suction opening 11 extending over the entire width of the web.
  • the web B is fed via further guide rollers 12, 13 a squeezing 14. It comprises a pair of squeezing rollers 15, 16 which form a nip 17 between them.
  • the contact pressure of the nip rollers 15, 16 on the guided through the nip 17 Wa ⁇ renbahn B is dimensioned such that a further part of the still remaining in the Wa ⁇ renbahn liquid is squeezed, but the web is not mechanically acted on a degree, that could affect the quality of the web.
  • the web B is fed to a dryer 20 for removal of the residual moisture and subsequently to further treatment or winding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The invention relates to a method and a device for compacting a web of endless fabric comprising a nonwoven. According to the inventive method and device, the web of endless fabric is subjected to the following treatment steps: a) impinging the web of endless fabric with a pressurized liquid; b) sucking off liquid; c) squeezing off liquid; d) drying the web of endless fabric.

Description

Verfahren und Vorrichtung zur Verfestigung einer ein Vlies umfas¬ senden Warenbahn Method and device for solidifying a web comprising a nonwoven web
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Verfestigung einer ein Vlies umfassenden Warenbahn.The invention relates to a method and a device for solidifying a fabric web comprising a nonwoven.
Wenn von „ein Vlies umfassenden Warenbahn" die Rede ist, so sind hier- mit auch Warenbahnen gemeint, die vollständig aus Vlies bestehen.When referring to "web comprising a web", this also means webs that consist entirely of nonwoven.
Ein Vlies ist ein textiles Flächengebilde, das aus Filamenten besteht, die thermisch, chemisch oder mechanisch miteinander verbunden werden.A nonwoven is a textile fabric that consists of filaments that are thermally, chemically or mechanically bonded together.
Zur Verfestigung auf mechanischem Wege gehört das bekannte Verfahren der Wasserstrahlverfestigung, bei dem Wasserstrahlen unter Druck zu¬ mindest einer Oberfläche des Vlieses zugeführt werden und eine Kompak- tierung des Vlieses bewirken.Mechanical hardening involves the known method of hydroentanglement, in which water jets are supplied under pressure to at least one surface of the web and cause compacting of the web.
Nach dem Schritt der Wasserstrahlbeaufschlagung ist es erforderlich, das Vlies zu trocknen. Hierzu ist es bekannt, das Vlies anschließend einer Saugvorrichtung, mittels derer Wasser abgesaugt wird, und schließlich einem Trockner, in dem die Verdunstung von im Vlies befindlicher Rest¬ flüssigkeit bewirkt wird, zuzuführen.After the water jet application step, it is necessary to dry the nonwoven fabric. For this purpose, it is known, the fleece then a suction device, by means of which water is sucked off, and finally a dryer in which the evaporation of befindlicher in the web residual liquid is supplied to feed.
Insbesondere der Bearbeitungsschritt des Trocknens in dem Trockner ist energieintensiv. Der Erfindung liegt daher die Aufgabe zugrunde, ein Ver¬ fahren und eine Vorrichtung zur Verfestigung einer ein Vlies umfassenden Warenbahn zu schaffen, dessen Energiebedarf gesenkt ist.In particular, the processing step of drying in the dryer is energy intensive. The invention is therefore based on the object, a Ver¬ drive and a device for solidifying a web comprising a web to create, the energy consumption is lowered.
Diese Aufgabe wird durch das beanspruchte Verfahren und die bean¬ spruchte Vorrichtung gelöst. Das erfindungsgemäße Verfahren sieht vor, vor dem Schritt des Trock¬ nens Flüssigkeit von der bereits verfestigtes Vlies umfassenden Waren¬ bahn abzuquetschen.This object is achieved by the claimed method and the bean¬ spruchte device. The method according to the invention provides for squeezing out liquid from the already consolidated nonwoven web before the step of drying.
Überraschenderweise hat sich gezeigt, daß der Flüssigkeitsgehalt der Wa¬ renbahn durch diese Maßnahme vor der Trocknung soweit gesenkt wer¬ den kann, daß sich gegenüber dem bekannten Verfahren insgesamt eine günstigere Energiebilanz ergibt. Dieses Ergebnis war insbesondere des¬ halb überraschend, da sich gezeigt hat, daß durch das Abquetschen die Qualität des Vlieses trotz der hiermit verbundenen mechanischen Einwir¬ kung nicht negativ beeinflußt wird.Surprisingly, it has been shown that the liquid content of the Wa¬ renbahn by this measure before drying can be lowered so far wer¬ that results in comparison to the known method overall a more favorable energy balance. This result was particularly surprising, since it has been shown that the quality of the nonwoven fabric is not adversely affected by the squeezing despite the mechanical action associated therewith.
Der erfindungsgemäße Schritt des Abquetschens von Flüssigkeit kann anstatt des bislang angewandten Absaugens angewendet werden. Es ist jedoch besonders bevorzugt, wenn vor dem Abquetschen überflüssige Flüssigkeit auch abgesaugt wird, da hierdurch die Effektivität des Ab¬ quetschvorgangs erhöht und eine Warenbahn geringerer Restfeuchte dem Trocknungsvorgang zugeführt werden kann. Überraschenderweise hat sich gezeigt, dass durch ein Absaugen vor dem Abquetschen ein beson- ders schonender Trocknungsvorgang bewirkt wird. Erklärbar ist dies durch geringere Querströmungen der Flüssigkeit während des Abquetschschrit- tes, da wegen der geringeren Restfeuchte nur noch geringere Flüssig¬ keitsmengen pro Zeiteinheit aus dem Vlies austreten müssen.The liquid squeezing step according to the invention can be used instead of the previously used siphoning. However, it is particularly preferred if superfluous liquid is also sucked off prior to squeezing, as this increases the effectiveness of the squeezing operation and allows a web of lesser residual moisture to be fed to the drying process. Surprisingly, it has been shown that a particularly gentle drying process is effected by suction before squeezing. This is explained by lower cross flows of the liquid during the Abquetschschrit- tes, since due to the lower residual moisture only smaller Flüssigkeits¬ keitsmengen per unit time must emerge from the web.
Als Flüssigkeit findet vorzugsweise Wasser Verwendung. Zwar ist es denkbar, auch andere, beispielsweise bei Raumtemperatur leichter flüch¬ tige Flüssigkeiten, zur Verfestigung des Vlieses zu verwenden, bevorzugt ist jedoch weiterhin die Verwendung von Wasser, da dies am kostengüns¬ tigsten ist und keine Probleme mit der Bereitstellung und/oder Entsorgung bereitet. Die Vorrichtung zur Anwendung des erfindungsgemäßen Verfahrens um¬ faßt eine Einrichtung, mittels welcher unter Druck stehende Flüssigkeit der Warenbahn zugeführt werden kann, ein der Einrichtung nachgeschaltetes Quetschwerk, mittels welchem Flüssigkeit von der Bahn abquetschbar ist, und einen Trockner zum Trocknen der Warenbahn. Die Warenbahn wird bei dieser Vorrichtung kontinuierlich von der Verfestigungseinrichtung über das Quetschwerk dem Trockner zugeführt, wobei nach Durchlauf des Quetschwerks die Warenbahn eine so geringe Restfeuchte aufweist, daß die zur Bewirkung des Trocknungsvorgangs vom Trockner benötigte E- nergiemenge reduziert ist.The liquid used is preferably water. Although it is conceivable to use other liquids which are more readily volatile, for example at room temperature, to solidify the nonwoven, preference is furthermore given to using water, since this is the most economical and no problems with the provision and / or disposal prepares. The apparatus for using the method according to the invention comprises a device by means of which pressurized liquid can be fed to the fabric web, a squeezing device connected downstream of the device by means of which liquid can be squeezed off the web, and a dryer for drying the material web. The web is fed in this apparatus continuously from the solidification device via the squeezing the dryer, wherein after passing through the squeezing the web has such a low residual moisture that the required for effecting the drying process by the dryer e- nergiemenge is reduced.
Um den Energiebedarf weiter senken zu können, ist es bevorzugt, wenn die Vorrichtung zusätzlich eine Sauge zum Absaugen überschüssiger Flüssigkeit umfaßt, die - in Vorlaufrichtung der Bahn gesehen - dem Quetschwerk vorgeschaltet ist.In order to further reduce the energy demand, it is preferred if the device additionally comprises a suction for sucking excess liquid, which - seen in the feed direction of the web - is connected upstream of the squeezing.
Das erfindungsgemäße Verfahren und die erfindungsgemäße Vorrichtung sollen unter Bezugnahme auf die beiliegende, schematische Zeichnung erläutert werden.The inventive method and the device according to the invention will be explained with reference to the accompanying schematic drawing.
Die als Ganzes mit 100 bezeichnete Vorrichtung umfaßt eine Verfesti¬ gungseinrichtung 1. Letztere weist eine Trommel 2 auf, um die eine das zu verfestigende Vlies umfassende Warenbahn B um etwa 220° herumge¬ führt ist. Über einen Teilumfang der Trommel 2 verteilt sind Düsen 3 an- geordnet, mittels welcher Wasserstrahlen 4 unter Druck in Richtung der Normalen der Warenbahn B zugeführt werden.The apparatus designated as a whole by 100 comprises a securing device 1. The latter has a drum 2 about which a web B comprising the web to be consolidated is guided through approximately 220 °. Distributed over a partial circumference of the drum 2, nozzles 3 are arranged, by means of which water jets 4 are supplied under pressure in the direction of the normal of the web B.
Nach dem Umlaufen der Trommel 2 wird die Warenbahn B von einem endlos um Umlenkwalzen 5, 6, 7 mit der Vorlaufgeschwindigkeit der Wa- renbahn umlaufenden Siebband 8 geführt. In dem Bereich, in dem die Wa¬ renbahn B an dem Siebband 8 anliegt, ist auf der der Warenbahn B ge- genüber liegenden Seite des Siebbandes 8 eine Saugvorrichtung 9 vorge¬ sehen. Sie umfaßt einen mit Unterdruck beaufschlagbaren Saugbalken 10, der eine sich über die gesamte Breite der Bahn erstreckende Absaug¬ öffnung 11 umfaßt. Mittels der Saugvorrichtung 9 wird ein Teil der mittels der Düsen 3 der Warenbahn zugeführten Flüssigkeit der Warenbahn B entzogen.After circulating the drum 2, the web B is guided by an endlessly around deflecting rollers 5, 6, 7 with the advance speed of the web recirculating belt 8. In the area in which the web B rests against the screen belt 8, on the web B opposite side of the screen belt 8 see a suction device 9 vorge¬. It comprises a suction bar 10 which can be pressurized with negative pressure and which comprises a suction opening 11 extending over the entire width of the web. By means of the suction device 9, a portion of the supplied by means of the nozzles 3 of the web liquid of the web B is withdrawn.
Die Warenbahn B wird über weitere Umlenkwalzen 12, 13 einem Quetschwerk 14 zugeführt. Es umfaßt ein Paar von Quetschwalzen 15, 16, die zwischen sich einen Quetschspalt 17 bilden. Der Anpreßdruck der Quetschwalzen 15, 16 auf die durch den Quetschspalt 17 geführte Wa¬ renbahn B ist derart bemessen, daß ein weiterer Teil der noch in der Wa¬ renbahn verbliebenen Flüssigkeit abgequetscht wird, auf die Warenbahn jedoch nicht in einem Maße mechanisch eingewirkt wird, das die Qualität der Warenbahn beeinträchtigen könnte.The web B is fed via further guide rollers 12, 13 a squeezing 14. It comprises a pair of squeezing rollers 15, 16 which form a nip 17 between them. The contact pressure of the nip rollers 15, 16 on the guided through the nip 17 Wa¬ renbahn B is dimensioned such that a further part of the still remaining in the Wa¬ renbahn liquid is squeezed, but the web is not mechanically acted on a degree, that could affect the quality of the web.
Über zwei weitere Umlenkwalzen 18, 19 wird die Warenbahn B einem Trockner 20 zum Entzug der Restfeuchte und anschließend einer Weiter¬ behandlung oder Aufwicklung zugeführt. Via two further deflection rollers 18, 19, the web B is fed to a dryer 20 for removal of the residual moisture and subsequently to further treatment or winding.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
100 Vorrichtung100 device
1 Verfestigungseinrichtung1 solidification device
2 Trommel2 drum
3 Düsen3 nozzles
4 Wasserstrahlen4 water jets
5, 6, 7 Umlenkwalzen5, 6, 7 guide rollers
8 Siebband8 screen belt
9 Saugvorrichtung9 suction device
10 Saugbalken10 suction bars
11 Absaugöffnung11 suction opening
12, 13 Umlenkwalzen12, 13 guide rollers
14 Quetschwerk14 crushing
15, 16 Quetschwalzen15, 16 nip rolls
17 Quetschspalt17 nip
18, 19 Umlenkwalzen18, 19 guide rollers
20 Trockner20 dryers
B Warenbahn B web

Claims

Patentansprüche claims
1. Verfahren zur Verfestigung einer ein Vlies umfassenden Warenbahn (B), mit den folgenden Schritten: a) Beaufschlagen der Warenbahn (B) mit unter Druck stehenderAnspruch [en] A process for consolidating a web (B) comprising a web, comprising the steps of: a) pressurizing the web (B)
Flüssigkeit; b) Absaugen von Flüssigkeit; c) Abquetschen von Flüssigkeit; d) Trocknen der Warenbahn (B);Liquid; b) aspirating liquid; c) squeezing off liquid; d) drying the web (B);
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Flüssigkeit Wasser ist.2. The method according to claim 1, characterized in that the liquid is water.
3. Vorrichtung zur Verfestigung einer ein Vlies umfassenden Waren- bahn nach einem Verfahren nach einem der Ansprüche 1 bis 3, mit a) einer Verfestigungseinrichtung (1 ) mittels welcher unter Druck stehende Flüssigkeit der Warenbahn (B) zugeführt werden kann, b) einem der Verfestigungseinrichtung (1 ) nachgeschalteten Quetschwerk (14), mittels welchem Flüssigkeit von der Waren¬ bahn (B) abquetschbar ist; c) mit einer dem Quetschwerk (14) vorgeschalteten Saugvorrichtung (9) und d) einem Trockner (20) zum Trocknen der Warenbahn (B). 3. A device for solidifying a web comprising a web according to a method according to one of claims 1 to 3, with a) a solidification device (1) by means of which pressurized liquid of the web (B) can be supplied, b) one of Solidification device (1) downstream squeezing device (14), by means of which liquid from the Waren¬ web (B) can be squeezed off; c) with a suction device (9) upstream of the squeezing device (14) and d) a dryer (20) for drying the material web (B).
PCT/EP2005/009361 2004-09-02 2005-08-31 Method and device for compacting a web of endless fabric comprising a nonwoven WO2006024508A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05776628A EP1784532A2 (en) 2004-09-02 2005-08-31 Method and device for compacting a web of endless fabric comprising a nonwoven
US11/661,949 US20080110590A1 (en) 2004-09-02 2005-08-31 Method and Device for Compacting a Web of Endless Fabric Including a Nonwoven

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004042477A DE102004042477A1 (en) 2004-09-02 2004-09-02 Method and device for solidifying a web comprising a nonwoven fabric
DE102004042477.2 2004-09-02

Publications (2)

Publication Number Publication Date
WO2006024508A2 true WO2006024508A2 (en) 2006-03-09
WO2006024508A3 WO2006024508A3 (en) 2006-06-15

Family

ID=35732208

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/009361 WO2006024508A2 (en) 2004-09-02 2005-08-31 Method and device for compacting a web of endless fabric comprising a nonwoven

Country Status (4)

Country Link
US (1) US20080110590A1 (en)
EP (1) EP1784532A2 (en)
DE (1) DE102004042477A1 (en)
WO (1) WO2006024508A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015000687A1 (en) * 2013-07-04 2015-01-08 Voith Patent Gmbh Method for retrofitting and operating a device for producing a non-woven fabric
WO2015000689A1 (en) * 2013-07-04 2015-01-08 Voith Patent Gmbh Method and device for producing non-woven fabric, in particular in accordance with a wet method
CN114929959A (en) * 2020-01-10 2022-08-19 安德里茨库斯特斯有限责任公司 Composite nonwoven fabric web manufacturing method and composite nonwoven fabric web manufacturing apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006042507A1 (en) * 2006-09-07 2008-03-27 Andritz Küsters GmbH & Co. KG Treatment method for non-woven webs comprises treating them with liquid and then squeezing it out using rollers with wide nip
DE102010036693B4 (en) 2010-07-28 2013-08-22 Andritz Küsters Gmbh Solidification method and solidification device for solidifying a web comprising a web
CN110607609B (en) * 2019-09-19 2020-08-07 射阳县宏瑞纺织机械制造有限公司 Spunlace machine suitable for pure chitosan fiber spunlace production line

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US2862251A (en) * 1955-04-12 1958-12-02 Chicopee Mfg Corp Method of and apparatus for producing nonwoven product
US5290628A (en) * 1992-11-10 1994-03-01 E. I. Du Pont De Nemours And Company Hydroentangled flash spun webs having controllable bulk and permeability
US6063717A (en) * 1995-10-06 2000-05-16 Nippon Petrochemicals Company Ltd. Hydroentangled nonwoven fabric and method of producing the same
DE10047777B4 (en) * 2000-09-18 2005-04-14 Vliestec Ag Textile fabrics with preferably high basis weights and process for producing the textile fabrics

Non-Patent Citations (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015000687A1 (en) * 2013-07-04 2015-01-08 Voith Patent Gmbh Method for retrofitting and operating a device for producing a non-woven fabric
WO2015000689A1 (en) * 2013-07-04 2015-01-08 Voith Patent Gmbh Method and device for producing non-woven fabric, in particular in accordance with a wet method
CN114929959A (en) * 2020-01-10 2022-08-19 安德里茨库斯特斯有限责任公司 Composite nonwoven fabric web manufacturing method and composite nonwoven fabric web manufacturing apparatus
CN114929959B (en) * 2020-01-10 2023-11-21 安德里茨库斯特斯有限责任公司 Method and apparatus for manufacturing composite nonwoven fabric web

Also Published As

Publication number Publication date
EP1784532A2 (en) 2007-05-16
WO2006024508A3 (en) 2006-06-15
US20080110590A1 (en) 2008-05-15
DE102004042477A1 (en) 2006-03-30

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