EP3250750A1 - Procédé et dispositif servant à produire des non-tissés voie humide - Google Patents

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

Info

Publication number
EP3250750A1
EP3250750A1 EP16702877.8A EP16702877A EP3250750A1 EP 3250750 A1 EP3250750 A1 EP 3250750A1 EP 16702877 A EP16702877 A EP 16702877A EP 3250750 A1 EP3250750 A1 EP 3250750A1
Authority
EP
European Patent Office
Prior art keywords
treatment unit
subsequent treatment
web
screen
nonwoven web
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
EP16702877.8A
Other languages
German (de)
English (en)
Other versions
EP3250750B1 (fr
Inventor
Dennis Latendorf
Andreas Pesch
Florian Diederich
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.)
Andritz Kuesters GmbH
Original Assignee
Andritz Kuesters GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=55300460&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3250750(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Andritz Kuesters GmbH filed Critical Andritz Kuesters GmbH
Publication of EP3250750A1 publication Critical patent/EP3250750A1/fr
Application granted granted Critical
Publication of EP3250750B1 publication Critical patent/EP3250750B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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.
  • 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.
  • 1a is a schematic side view of a wet nonwoven plant with free suspension device, screening device, hydroentanglement device and dewatering belt,
  • FIG. 1b schematically shows the end parts of a wet nonwoven system with dryer and winder
  • FIG. 2 shows an enlarged and schematic illustration of an exemplary embodiment of a web presentation for the interfaces X, Y according to FIG. 1 a, FIG.
  • FIG. 3 shows a second embodiment of a web presentation for the interfaces X, Y according to FIG. 1a, FIG.
  • FIG. 4 shows schematically a plan view of the outlet-side end region of the screening device in the region of the interface X according to FIG.
  • 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. 1 b shown.
  • a fiber suspension device 2 a screening device 3, at least one subsequent treatment unit 4 and possibly a rewinder 5 are arranged in series.
  • a water jet hardening device is provided as at least one treatment unit 4.
  • 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 produced nonwoven web 10 has a sufficient strength so that the material is lifted off the screen 11 by blowing off. This is illustrated in FIGS. 2 and 3 in conjunction with FIG. 4.
  • 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 3.
  • the web presentation 13 takes place via a respectively temporarily closed train of a train of its own free between screen 11 and the at least one subsequent treatment unit 4 and / or a free train at an interface 9 between treatment units 4.
  • 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
  • the transport path means 19 is formed as a suction conveyor belt. Both transport path devices 19 of FIG. 2 and FIG. 3 form a negative pressure due to the existing air flows at preferably the underside of the transport path 19. As a result, it is possible for the final lead-in belt 14 lifted off via the compressed air of the compressed air device 18 to be moved to the subsequent treatment unit 4. The end lead-in belt 14 is received by the suction catch device 21 on a screen belt 20 of the subsequent treatment unit 4.
  • the treatment unit 4 is, for example, a hydroentanglement.
  • the final leader 14 can be further stabilized by such hydroentanglement.
  • the transfer of the Endaufmentssbandes' be lifted 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.
  • this further treatment unit 6 is for example a vacuum drainage.
  • the final performance band 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 operationsbandes 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.
  • a variable vacuum suction box 26, which is displaceable along the screen belt 11, is preferably mounted under the screen belt of the screen device 3. After the nonwoven web runs in full width on the production line, with this vacuum suction box 26, the position of the web lift via an adjustment of the vacuum suction box 26 on the one hand and the adjustment of the vacuum on the other hand can be defined exactly. Thus, the free train between the vacuum suction 26 of the screening device 3 and the Saugfang responded 21 of the subsequent treatment unit 4 will be defined exactly. An uneven lifting of the web is prevented.
  • the web tension between the two screen belts 11, 20 is preferably with a slack control controlled. The same explanations apply to the interface 9 between two treatment units 4, 6.
  • 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.

Landscapes

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

Abstract

L'invention concerne un procédé servant à produire des non-tissés voie humide, selon lequel une suspension contenant des fibres est posée sur un tamis et déshydratée par des caisses aspirantes placées sous le tamis pour former une feuille de bande de non-tissé qui est enlevée du tamis et amenée à au moins une unité de traitement suivante, avant que la bande de non-tissé ne soit enroulable. La bande de non-tissé est transférée du tamis vers l'unité ou les unités de traitement suivantes et/ou est transférée au niveau d'interfaces entre les unités de traitement lors d'un démarrage de production et/ou après un arrêt de production, à l'aide d'un engagement de la bande. L'engagement est effectué respectivement par l'intermédiaire d'une chaîne temporairement fermée d'une chaîne libre entre le tamis et la ou les unités de traitement suivantes et/ou d'une chaîne libre au niveau d'une interface entre des unités de traitement, et la chaîne temporairement fermée est produite par des flux d'air qui soulèvent par soufflage une bande d'engagement d'extrémité en tant que partie de la bande de non-tissé, la fixent par génération d'une dépression au niveau d'un dispositif d'acheminement, et la reçoivent par aspiration au niveau de l'unité de traitement suivante concernée.
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

Publications (2)

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

Family

ID=55300460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16702877.8A Active EP3250750B1 (fr) 2015-01-28 2016-01-27 Procédé et dispositif servant à produire des non-tissés par voie humide

Country Status (5)

Country Link
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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Publication number Priority date Publication date Assignee Title
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
BR112022007424A2 (pt) 2019-12-13 2022-07-12 Delfortgroup Ag Material filtrante hidro emaranhado para produtos para fumar
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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Also Published As

Publication number Publication date
CN107429485B (zh) 2020-05-12
WO2016120014A1 (fr) 2016-08-04
US20180002866A1 (en) 2018-01-04
US10513826B2 (en) 2019-12-24
EP3250750B1 (fr) 2019-11-13
DE102015001008A1 (de) 2016-07-28
CN107429485A (zh) 2017-12-01

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