EP3250750B1 - Procédé et dispositif servant à produire des non-tissés par voie humide - Google Patents

Procédé et dispositif servant à produire des non-tissés par voie humide Download PDF

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Publication number
EP3250750B1
EP3250750B1 EP16702877.8A EP16702877A EP3250750B1 EP 3250750 B1 EP3250750 B1 EP 3250750B1 EP 16702877 A EP16702877 A EP 16702877A EP 3250750 B1 EP3250750 B1 EP 3250750B1
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EP
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Prior art keywords
installation
treatment unit
subsequent treatment
transfer
wire
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EP16702877.8A
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German (de)
English (en)
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EP3250750A1 (fr
Inventor
Dennis Latendorf
Andreas Pesch
Florian Diederich
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Andritz Kuesters GmbH
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Andritz Kuesters GmbH
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F2/00—Transferring continuous webs from wet ends to press sections
    • 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
    • D04H1/72—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 randomly arranged
    • D04H1/732—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 randomly arranged by fluid current, e.g. air-lay
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine

Definitions

  • the invention relates to a method and a device for producing wet laid nonwovens according to the preamble of claim 1 or 8.
  • the closed decrease with the aid of a pick-up felt requires good adhesion of the nonwoven web during its run on the felt underside.
  • the pick-up felt must have a sufficient moisture content.
  • experience shows that the nonwoven web must contain a considerable proportion of pulp and have a paper-like character, because otherwise the adhesion is inadequate even if the pick-up felt has sufficient moisture, so that the nonwoven web is released from the pick-up felt and causes malfunctions.
  • Another approach to this end is to avoid free trains by making compromises in the arrangement of the machine components, e.g. one above the other.
  • water is used to form fibers into a fabric or wet fleece.
  • the fibers are passed through a sieve in the water. While the water is being sucked through the sieve, the fibers are deposited on the sieve. This process step is called sheet formation.
  • the nonwoven still contains significantly more water than fibers after sheet formation.
  • About vacuum suction water is further removed from the nonwoven, but the substance at the interface to the screen, the Usually formed by a Schrägsiebformer, not a stable product, but a loose composite of fibers.
  • WO2015 / 000687A1 discloses a method for producing a wet-laid nonwoven web according to the preamble of present claim 1.
  • the object of the present invention the object of providing a method and apparatus for producing wet nonwovens to improve the web performance at the start of production and / or after a production interruption.
  • the temporarily closed trains offer the possibility of permitting, on the one hand, free traction between the treatment units / machine components and, on the other hand, assigning the temporarily closed trains to an automated solution so that the nonwoven web can be listed at higher machine speeds.
  • the wet nonwoven fabrics produced on a screening device especially when long fibers are used, they have a sufficient strength to be replaced with compressed air from the screen of the screening device.
  • a web-laying device at the interfaces between the screening device and a subsequent treatment unit or at interfaces between two adjacent treatment units, which is designed as a temporarily closed train. Detected from the temporarily closed draw is a final leader of the nonwoven web which is cut from the moving web on the downstream side of a wire of the screening device. This strip is transferred with air flows of the temporarily closed train to the respective subsequent treatment unit.
  • the cut Endauf arrangementsband is lifted off the screen to be transferred, for example by compressed air to a transport device. From the subsequent treatment unit, this band is caught using an air flow, so that the created transfer of the Endauf arrangementssbandes represents a temporarily closed train.
  • Essential here is a preferably controlled withdrawal, transfer and the following controlled recording.
  • the invention relates to a method and an apparatus for the production of wet laid nonwovens.
  • An example provided for wet-laid plant 1 is in Fig. 1a and Fig. 1b shown.
  • a fiber suspension device 2 Thereafter, arranged in series are a fiber suspension device 2, a screening device 3, at least one subsequent treatment unit 4 and optionally a rewinder 5.
  • a fiber suspension device 2 In the case of Fig. 1a and Fig. 1b shown wet-laid plant 1 is provided as at least one treatment unit 4 a Wasserstrahlverest Trents Rhein.
  • further treatment units 6, 7 are provided.
  • the treatment unit 6 is for example a drying screen and the treatment unit 7 is for example a dryer.
  • the screening device 3 is shown as Schrägsiebformer. Alternative embodiments of the screening device 3 can be used. Between the screening device 3 and the subsequent treatment unit 4, an interface 8 is provided. For example, an interface 9 is provided between the treatment unit 4 and the treatment unit 6. Both interfaces 8, 9 are formed as free trains when the nonwoven web 10 is listed.
  • the inventive method for the production of wet-laid nonwovens provides that an aqueous suspension is deposited with fibers on a wire 11 of the screening device 3 and dewatered by suction boxes 12 under the wire for sheet formation of a nonwoven web 10, which is removed from the screen 11 and at least one subsequent treatment unit 4 is supplied before the nonwoven web 10 is finally wound on a roll 23.
  • the nonwoven web is transferred from the wire 11 to the at least one subsequent treatment unit 4 and / or at an interface 9 between two treatment units 4, 6 at a production start and / or after a production interruption with the aid of a web presentation 13.
  • the respective temporarily closed train of a Bruauf arrangement 13 is generated by air currents. These flows of air act on an end band 14 which is cut by a cutter 16 which acts on the nonwoven web 10 downstream of the screen 11. By means of the cutting device 16, the Endiller operationssband 14 is separated from the residual web 15 of the nonwoven web 10. By means of the Endauf operationssbandes 14 the Bruauf operation takes place while the residual web 15 falls into a pulper 17.
  • the Endiller arrangementsband 14 is lifted as part of the running nonwoven web 10 by blowing by means of a compressed air device 18 from the screen 11.
  • a compressed air device 18 By generating negative pressure at a transport path 19, the Endiller operationsband 14 is attached to a transport path formed by the transport path 19 and received by suction on the respective subsequent treatment unit 4.
  • the suction on the subsequent treatment unit 4 for example, by means of a Saugfang liked 21st
  • wet nonwoven products have sufficient strength when they have been dewatered on a screening device 3, which is designed, for example, as a skew screening machine. This is especially true when long fibers are used for nonwoven web production. Due to this generated strength of the nonwoven web through the screening device 3, the screen web can be released with compressed air from the compressed air device 18 from the screen 11 for a web performance. The lifted off the screen 11 Endauf operationsband 14 has sufficient stability to be transferred by compressed air to the transport path 19 device.
  • the transport path 19 is in Fig. 2 shown as air guide device. In Fig. 3 the transport path 19 is designed as a suction conveyor belt. Both transport pathways 19 of the Fig. 2 and the Fig.
  • the treatment unit 4 for example, a hydroentanglement.
  • the final leader 14 can be further stabilized by such hydroentanglement.
  • the transfer of the Endauf holderssbandes can be lifted again with compressed air from the wire 20 of the treatment unit 4 and transferred with a vacuum generating conveyor 19 on a next wire 22 of a subsequent treatment unit 6 on the same principle.
  • the Endauf operationsband 14 After the screen belt 22 such a vacuum dewatering the Endauf operationsband 14 is usually sufficiently stable to be inserted into a rope scissors. The lifting can in turn be done with compressed air through the wire. The Endauf operationsband 14 can be caught by a baffle plate or another screen belt and transferred to a rope scissors. The described transfer of the Endauf operationssbandes 14 with the temporarily closed train can be easily performed at production speeds between 200 to 250 m / min and higher.
  • the nonwoven web 10 can be driven on the screening device 3 to the complete fabric width.
  • the wet fleece is sufficiently stable to be guided over the entire fabric width directly after the screening device 3 via a free train to the next treatment unit.
  • the nonwoven web can be converted economically more favorably compared to conventional solutions, and the controlled free train moreover offers an economically favorable solution for web guide.
  • the aforesaid slack control can be supplemented by a control device for controlling the lifting, transfer and picking up of an end slack band 14 at the interfaces 8, 9 with a web track 13.

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

Claims (12)

  1. Procédé servant à fabriquer des tissus non-tissés obtenus par voie humide, où une suspension aqueuse avec des fibres est déposée sur un tamis (3) et est déshydratée par des caisses aspirantes sous le tamis pour former une feuille d'une bande non-tissée, qui est retirée du tamis et est guidée vers au moins un groupe de traitement (4) suivant avant que la bande non-tissée ne puisse être enroulée, et servant à transférer la bande non-tissée depuis le tamis vers l'au moins un groupe de traitement suivant et/ou à transférer la bande non-tissée à des interfaces (9) entre des groupes de traitement (4, 6) lors d'un lancement de production et/ou après un arrêt de production à l'aide d'un engagement de bande (13), et dans lequel un système d'hydroliage est prévu en tant qu'au moins un groupe de traitement, caractérisé en ce que l'engagement de bande est effectué par l'intermédiaire d'une chaîne respectivement temporairement fermée d'une chaîne libre entre le tamis et l'au moins un groupe de traitement suivant et/ou d'une chaîne libre au niveau d'une interface entre des groupes de traitement, et la chaîne respectivement temporairement fermée est générée par l'intermédiaire de flux d'air, qui soulèvent par soufflage une bande d'engagement d'extrémité (14) en tant que partie de la bande non-tissée défilant, la fixent par génération d'une dépression au niveau d'un système d'acheminement (19) et la reçoivent par aspiration au niveau du groupe de traitement respectivement suivant.
  2. Procédé selon la revendication 1, caractérisé en ce que la bande d'engagement d'extrémité (14) est soulevée du tamis (3) avec de l'air comprimé.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la bande d'engagement d'extrémité (14) est acheminée avec une bande de transport par aspiration.
  4. Procédé selon la revendication 1 ou 2, caractérisé en ce que la bande d'engagement d'extrémité (14) est acheminée avec un système déflecteur d'air.
  5. Procédé selon la revendication 3 ou 4, caractérisé en ce que l'acheminement de la bande d'engagement d'extrémité (14) est effectué par fixation au niveau d'un côté inférieur du système d'acheminement (19).
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'aspiration est effectuée au niveau du groupe de traitement (4, 6) suivant respectivement au moyen d'un système de collecte par aspiration (21) sous une bande de tamis du groupe de traitement suivant.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que les flux d'air de la chaîne temporairement fermée sont adaptés les uns aux autres pour réaliser une chaîne de bande homogène dans la zone du transfert.
  8. Dispositif servant à mettre en œuvre le procédé selon l'une quelconque ou plusieurs des revendications 1 à 7, avec une installation de production de non-tissés obtenus par voie humide (1) avec un système de suspension de fibres (2), un système de tamisage (3), au moins un groupe de traitement (4) suivant et avec au moins une chaîne libre au niveau d'une interface (8) entre le système de tamisage (3) et le groupe de traitement (4) suivant et/ou au niveau d'une interface (9) entre deux groupes de traitement suivants, dans lequel un système d'hydroliage est prévu en tant qu'au moins un groupe de traitement (4), dans lequel la chaîne libre (4, 6) peut être fermée temporairement par l'intermédiaire de systèmes à flux d'air d'un système d'engagement de bande (13) pour une bande d'engagement d'extrémité (14) découpée, qui sont positionnés de telle manière que la bande d'engagement d'extrémité (14) est retirée en tant que partie de la bande non-tissée (10) défilant par un système à air comprimé (18), est transférée par un système d'acheminement (19) générant une dépression et est reçue par un système d'aspiration d'air (21) du groupe de traitement suivant.
  9. Dispositif selon la revendication 8, caractérisé en ce qu'est prévu, en aval du système à air comprimé (18) servant à retirer la bande non-tissée (10), un système d'aspiration (26) disposé dans la direction de défilement de la bande non-tissée (10), au moyen duquel un emplacement de transfert peut être positionné dans la chaîne libre vers le groupe de traitement (4) suivant.
  10. Dispositif selon la revendication 8 ou 9, caractérisé en ce que le système d'acheminement (19) générant une dépression est réalisé en tant que bande de transport par aspiration ou d'un système déflecteur d'air.
  11. Dispositif selon l'une quelconque des revendications 8 à 10, caractérisé en ce que le système d'acheminement (19) présente un côté inférieur réalisé en tant que surface d'aspiration.
  12. Dispositif selon l'une quelconque des revendications 8 à 11, caractérisé en ce que pour recevoir une bande d'engagement d'extrémité (14) transférée, le groupe de traitement (4, 6) suivant présente côté entrée un système de collecte par aspiration (21), qui est raccordé à un système de commande servant à contrôler le soulèvement, le transfert et la réception d'une bande d'engagement d'extrémité (14) dans la chaîne temporairement fermée.
EP16702877.8A 2015-01-28 2016-01-27 Procédé et dispositif servant à produire des non-tissés par voie humide Active EP3250750B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015001008.5A DE102015001008A1 (de) 2015-01-28 2015-01-28 Verfahren und Vorrichtung zur Herstellung von nassgelegten Vliesstoffen
PCT/EP2016/000138 WO2016120014A1 (fr) 2015-01-28 2016-01-27 Procédé et dispositif servant à produire des non-tissés voie humide

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Publication Number Publication Date
EP3250750A1 EP3250750A1 (fr) 2017-12-06
EP3250750B1 true EP3250750B1 (fr) 2019-11-13

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US (1) US10513826B2 (fr)
EP (1) EP3250750B1 (fr)
CN (1) CN107429485B (fr)
DE (1) DE102015001008A1 (fr)
WO (1) WO2016120014A1 (fr)

Families Citing this family (5)

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DE102015001008A1 (de) * 2015-01-28 2016-07-28 Andritz Küsters Gmbh Verfahren und Vorrichtung zur Herstellung von nassgelegten Vliesstoffen
DE102015005384A1 (de) 2015-04-28 2016-11-03 Andritz Küsters Gmbh Verfahren und Vorrichtung zur Herstellung von nassgelegten Vliesstoffen
JP7504205B2 (ja) 2019-12-13 2024-06-21 デルフォルトグループ、アクチエンゲゼルシャフト 喫煙製品用水流交絡フィルタ材料
DE102021107900B4 (de) * 2021-03-29 2023-02-02 Andritz Küsters Gmbh Anlage zum Verfestigen von Fasern umfassenden Lagen zu einer Vliesbahn
CN113699690A (zh) * 2021-09-30 2021-11-26 许玉梅 一种复合无纺布加工工艺

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CN107429485A (zh) 2017-12-01
EP3250750A1 (fr) 2017-12-06
WO2016120014A1 (fr) 2016-08-04
US10513826B2 (en) 2019-12-24
DE102015001008A1 (de) 2016-07-28
US20180002866A1 (en) 2018-01-04

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