EP2841634B1 - Procédé et dispositif de fusion-soufflage, de formation et de dépôt de fibres finies pour obtenir un non-tissé - Google Patents

Procédé et dispositif de fusion-soufflage, de formation et de dépôt de fibres finies pour obtenir un non-tissé Download PDF

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Publication number
EP2841634B1
EP2841634B1 EP13718534.4A EP13718534A EP2841634B1 EP 2841634 B1 EP2841634 B1 EP 2841634B1 EP 13718534 A EP13718534 A EP 13718534A EP 2841634 B1 EP2841634 B1 EP 2841634B1
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EP
European Patent Office
Prior art keywords
drums
forming
melt
range
blowing
Prior art date
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Revoked
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EP13718534.4A
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German (de)
English (en)
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EP2841634A1 (fr
Inventor
Günter SCHÜTT
Bernhard Potratz
Jens Neumann-Rodekirch
Anthony Barber
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Oerlikon Textile GmbH and Co KG
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Oerlikon Textile GmbH and Co KG
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    • 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
    • D04H1/56—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 in association with fibre formation, e.g. immediately following extrusion of staple fibres
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
    • 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

Definitions

  • the invention relates to a method for melt blowing, forming and depositing finite fibers into a nonwoven fabric according to the preamble of claim 1 and to an apparatus for melt blowing, forming and depositing finite fibers into a nonwoven fabric according to the preamble of claim 5.
  • a spunbond process synthetic filaments are extruded by means of a spinneret and cooled. Subsequently, the filaments are fed by means of a supplied compressed air as a fiber stream to a nonwoven fabric.
  • the nonwoven fabric consists essentially of endless filaments with higher strengths.
  • a compressed air flow generated by the additional extraction device is used, which can be set individually to the respective process.
  • the stream of hot air generated at the meltblowing die is used to pull out the extruded fibers and lay down the fibers.
  • the filing of the fibers can be done directly on screen belts or sieve drums, are accumulated on the surfaces of the fiber stream and merged into a fiber composite.
  • Such a method and such a device are for example from DE 30 41 089 A1 known.
  • two forming elements are arranged below the melt-blowing, which form a forming gap between them.
  • the forming gap is held centrally to the meltblowing die, so that the fiber stream is directed directly onto the forming nip.
  • a portion of the air flow acts directly on the deposited in the forming gap composite sections.
  • the air flow is absorbed and removed by the screen surface. This can be realized in the deposition of the fiber stream in a forming gap only on the laterally arranged forming elements.
  • Another object of the invention is to improve the known method and the known apparatus for melt blowing, forming and depositing finite fibers to form a nonwoven fabric such that highly voluminous nonwoven fabrics with small to large basis weights are flexible to produce.
  • the fibers are guided essentially vertically vertically from the melt-blowing nozzle to the forming gap via an adjustable blowing line, the setting range of the blowing line being in the range from 100 mm to 2,000 mm.
  • the invention is characterized in that the hot air flow required to produce the fibers can be selected at the melt-blowing nozzle independently of the deposition of the fibers into the forming gap.
  • the blaze can be shortened or extended as required.
  • the blowing line below the melt-blowing nozzle and the forming gap can advantageously be aligned vertically, so that a 3D structure of the fiber composite can be formed during the deposition and formation.
  • the fibers are blown for forming between two counter-rotating drums with air-permeable drum walls, which drums between them form the forming gap and each with a same peripheral speed in the range of 0, 1 m / min to 50 m / min are driven.
  • the peripheral speeds of the drums By adjusting the peripheral speeds of the drums, the surface densities of the fiber volume can be advantageously influenced.
  • very loose fiber webs can be produced.
  • the fiber composite after being formed by one of the drums, be deposited on the nonwoven fabric on a screen belt which discharges the fiber web tangentially to the drums.
  • further treatments on the nonwoven fabric can be carried out in a short sequence.
  • the thickness of the produced nonwoven fabric is determined essentially by a forming cross section of the forming nip.
  • the setting of the forming gap is done in a simple manner such that a Distance between the drums is adjusted in a range of 1 mm to 100 mm symmetrically or asymmetrically between the drums. In an asymmetric adjustment, the center axis of the formation gap no longer coincides with the center of the meltblowing die. In addition, deposition effects and formations within the formation gap can thereby be generated.
  • the drums can have identical or different drum diameters with a diameter ratio in the range from 0.5 to 2.0. This can advantageously produce different surface structures on the nonwoven fabric.
  • the drums have for this purpose a drum diameter which is in the range of 100 mm to 800 mm.
  • the device according to the invention is to be improved such that one of the drums has an inner suction chamber with a negative pressure source is connected and which is shielded by the air-permeable drum wall to the environment.
  • additional suction streams can be generated to assist in the generation and guidance of the fibrous web.
  • both drums each have a separate suction chamber, which together a vacuum source or separately connected to two vacuum sources.
  • the development of the invention has been found in which an angular position of the suction chamber on the circumference of the drum is adjustable.
  • the position of the suction chamber can be freely selected relative to the inlet and outlet of the Formierspaltes.
  • a first embodiment of the device according to the invention is shown schematically in a cross-sectional view.
  • the exemplary embodiment has a melt-blowing nozzle 1 and a forming element 2 held below the melt-blowing nozzle 1.
  • the forming element 2 is formed by two drums 3 driven in opposite directions, which form a forming gap 6 between them.
  • the forming gap 6 extends between the drums 2.1 and 2.2 in the vertical direction, the drums 2.1 and 2.2 symmetrical to a longitudinal axis of the Schmelzblasdüse 1 are held.
  • the drives of the drums 2.1 and 2.2 are not shown here in detail and can be performed by a group drive or individual drives.
  • the drums 2.1 and 2.2 each have an air-permeable drum wall 3, which rotate in opposite directions in the fiber blowing direction with the predetermined by the drive of the drums 2.1 and 2.2 peripheral speed.
  • the melt-blowing nozzle 1 is arranged vertically adjustable above the drums 2.1 and 2.2 in a machine frame 13.
  • the melt-blowing nozzle 1 comprises at least one row of nozzle channels 10 arranged in the center plane and interacting on one outlet side with air nozzles 11.1 and 11.2 for producing a fiber stream 7.
  • the air nozzles 11.1 and 11.2 are each assigned two compressed air chambers 12.1 and 12.2, which are connected to compressed air source, not shown here.
  • the nozzle channels on the melt-blowing nozzle 1 extend over a maximum length of seven meters.
  • the drums 2.1 and 2.2 for forming the formation gap 6 also have a length in the range of seven meters. This is also referred to as a so-called working width, in which a nonwoven fabric is formed continuously from synthetic fibers.
  • the melt-blowing nozzle 1 is adjustable on the machine frame 13 at different heights so that a free blowing distance is formed between the melt-blowing nozzle 1 and the forming gap 6.
  • the free blasstrack is in Fig. 1 marked with the letter B and determined by the distance between the bottom of the melt-blowing nozzle 1 and the top of the drums 2.1 and 2.2.
  • the blowing range can be adjusted in steps of 100 mm to 2,000 mm in steps or steplessly.
  • the fiber streams arriving directly into the formation gap can be influenced without additional means.
  • the nonwoven fabric is discharged immediately after exiting from the forming gap 6 through the drum wall 3 of the drum 2.2.
  • a suction chamber 4 is formed on the outlet side of the drum 2.2, which is coupled to a vacuum source 5.
  • a forced guidance of the fiber fleece is achieved so that the fiber fleece can be deflected and removed directly tangentially to the drum 2.2.
  • the blown air forming the fiber stream can advantageously be taken up and removed via the suction chamber 4 and the vacuum source 5.
  • a second suction chamber which would be connected to a vacuum source.
  • Fig. 1 is shown on the drum 2.1, the possible formation of a second suction chamber in a dashed line.
  • the suction chamber 4 'of the drum 2.1 and the suction chamber 4 of the drum 2.2 each have an offset angular position on the drum 2.1 and 2.2 in order to influence the fiber deposition and the discharge of the blowing air.
  • the angular position of the suction chamber 4 and 4 'could be made adjustable on the circumference of the drums 2.1 and 2.2. This achieves high flexibility for fiber deposition.
  • the suction chambers 4 and 4 'could be arranged offset from each other to the forming gap 6 - as in Fig. 1 shown - or be set opposite to the drums 2.1 and 2.2.
  • the angular position of the suction chamber 4 on the circumference of the drum 2.2 in both clockwise and counterclockwise adjustable.
  • the region at the inlet of the forming gap 6 or the region at the outlet of the forming gap 6 can be sucked.
  • the drum 2.1 and 2.2 each with the same size drum diameters are executed.
  • the drum diameter are entered with the code letters D 1 and D 2 .
  • D 1 D 2 .
  • the drum diameter of the drums 2.1 and 2.2 may in this case be in a range of 100 mm to 800 mm.
  • the forming gap 6 formed by the drums 2.1 and 2.2 has a forming cross-section which is determined by the spacing of the two drums 2.1 and 2.2.
  • the distance between the drums is in Fig. 1 marked with the capital letter F.
  • the distance F between the drums 2.1 and 2.2 can be changed by moving one of the drums 2.1 or 2.2 or both drums 2.1 and 2.2.
  • FIG. 3 An asymmetrical configuration of the formation gap is, for example, in the exemplary embodiment Fig. 3 shown.
  • the embodiment according to Fig. 3 is identical to the embodiment according to Fig. 1 so that only the differences are explained below.
  • the drum 2.1 is formed with a smaller drum diameter.
  • the drum diameter D 1 of the drum 2.1 is smaller than the drum diameter D 2 of the drum 2.2.
  • a polymer melt is applied by means of a melt source not shown here the melt blowing nozzle.
  • the melt is passed under pressure through the nozzle channels 10 of the melt-blowing nozzle 1.
  • a hot air flow is generated by the air nozzles 11.1 and 11.2, which together with the fibers emerging from the nozzle channels 10 blown into the blowing line.
  • the generated fiber stream 7 is aligned vertically and meets at the end of the blowing line B on the forming gap 6 and the drum walls 3 of the drums 2.1 and 2.2.
  • the fibers are guided into the forming gap 6 and formed into a fiber composite 8.
  • the formation takes place essentially through the forming cross section of the forming gap 6, so that a finished nonwoven fabric 9 is already present on the outlet side of the drums 2.1 and 2.2.
  • the fiber fleece 9 is taken from the drum 2.2 after leaving the Form michsspaltes 6 and discharged.
  • the drum speeds of the drum 2.1 and 2.2 are set synchronously and can be in a range of peripheral speed of 0.1 to 50 m / min. be adjusted continuously.
  • Fig. 2 a further embodiment of the device according to the invention for melt blowing, forming and depositing synthetic fibers is shown schematically in a cross-sectional view.
  • the exemplary embodiment is essentially identical to the exemplary embodiment according to FIG Fig. 1 , so that at this point only the differences will be explained and otherwise reference is made to the above description.
  • the meltblowing 1 is identical to the embodiment according to Fig. 1 , below the melt-blowing nozzle 1, the drums 2.1 and 2.2 are arranged in a guide frame 15 as forming element 2.
  • the drums 2.1 and 2.2 can be continuously adjusted together in position on the guide frame 15 wherein on the one hand a blow line B formed between the melt blowing nozzle 1 and the forming gap 6 and on the other hand a stacking height A formed between a wire 4 and the drum 2.2.
  • the storage height is in Fig. 2 entered with the code letter A.
  • the screen belt 14 below the drums 2.1 and 2.2 is guided over a plurality of guide rollers 16 such that the nonwoven fabric tangentially from drums 2.1 and 2.2 can be removed. Due to the adjustment between the drums 2.2 and the screen belt 14, it is additionally possible to form an additional forming zone for the nonwoven fabric.
  • the drums 2.1 and 2.2 are driven in opposite directions together via an electric motor 19.
  • the drive axes of the drums 2.1 and 2.2 are connected to each other via a belt 20 and pulleys 21.
  • the direction of rotation of the drums 2.1 and 2.2 is rectified to the fiber stream 7, which arrives in the forming gap 6. in this respect can be controlled via the peripheral speed of the drum 2.1 and 2.2, the absorption of the fibers in the forming gap.
  • Fig. 2 illustrated embodiment of the device according to the invention is identical to the aforementioned embodiment according to Fig. 1 , Only the filing of the nonwoven fabric takes place on the below the drums 2.1 and 2.2 arranged screen belt. In this case, larger storage heights A can be adjusted so that the fiber composite emerging from the forming gap 6 initially separates from the drums and is then deposited freely on the wire belt.
  • one or both drums could be equipped with a suction chamber, as in the exemplary embodiment Fig. 1 is described.
  • FIG. 2 illustrated embodiment of the device according to the invention is particularly suitable for producing composite nonwovens.
  • Fig. 4 a further embodiment of the device according to the invention, in which a plurality of melt blowing nozzles are arranged side by side to merge several nonwoven fabrics to form a composite nonwoven.
  • a total of three blowing stations 17.1, 17.2 and 17.3 are shown, each showing a Schmelzblasdüse.
  • the fiber streams are taken up by a forming gap and formed and then deposited on the wire 14.
  • 17.1 and 17.2 different blown sections are set between the forming columns 6 and melt blowing nozzles 1 of the blowing stations.
  • the second blowing station 17.2 is identical to the first blowing station 17.1, so that a second nonwoven fabric is deposited on the surface of the screen belt 14 which forms a composite with the first nonwoven fabric.
  • the third blowing station 17.3 shows a melt-blowing nozzle 1, which is arranged at a short distance above the sieve belt 14.
  • a suction device 18 is formed, which serves to receive the fiber flow on the surface of the screen belt 16.
  • the nonwoven fabric produced by the blowing station 17.3 is deposited directly on the surface of the screen belt 14 and forms a composite nonwoven with the already existing fiber webs.
  • the inventive method and apparatus are suitable for all spinnable materials such as polyolefins (eg polyethylene, polypropylene, polyoctene, polymerized cycloalkenes), aliphatic, cycloaliphatic and partially aromatic polyesters, aliphatic and aromatic polyamides, polyarylene sulfides and polyarylene oxides, polyoxymethylene, polycarbonates, thermoplastics Polyurethanes or reactive resins (such as melamine resin, phenolic resin, epoxy resin) to process. Due to the adjustability of the blowing line, these materials can advantageously be produced at very different fiber strengths to very loose fiber webs. The formation within the formation gap can be carried out with high uniformity and constancy.
  • polyolefins eg polyethylene, polypropylene, polyoctene, polymerized cycloalkenes
  • aliphatic, cycloaliphatic and partially aromatic polyesters aliphatic and aromatic polyamides

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Nonwoven Fabrics (AREA)
  • Inorganic Fibers (AREA)

Claims (10)

  1. Procédé de fusion-soufflage, formage et dépôt de fibres sans fin pour former un non-tissé, dans lequel les fibres produites à travers une buse de fusion-soufflage sont soufflées avec un courant d'air chaud dans une fente de formage formée avec au moins un élément de formage et dans lequel l'assemblage fibreux formé à travers la fente de formage est évacué sous forme de non-tissé sur un côté de sortie de la fente de formage,
    caractérisé en ce que
    les fibres sont guidées librement essentiellement verticalement depuis la buse de fusion-soufflage jusqu'à la fente de formage par le biais d'une section de soufflage ajustable, la plage d'ajustement de la section de soufflage étant comprise entre 100 mm et 2000 mm et la section de soufflage pouvant être réglée par un réglage en hauteur de la buse de fusion-soufflage et/ou de l'élément de formage, les fibres, pour le formage, étant soufflées entre deux tambours tournant en sens inverse avec des parois de tambours perméables à l'air, lesquels tambours formant entre eux la fente de formage et lesquels étant chacun entraînés à une même vitesse périphérique dans la plage de 0,1 m/min à 50 m/min et, pour l'ajustement d'une section transversale de formage au niveau de la fente de formage, une distance entre les tambours dans une plage de 1 mm à 100 mm étant réglée de manière symétrique ou asymétrique entre les tambours.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    l'assemblage de fibres, après le formage à travers l'un des tambours pour donner le non-tissé, est déposé sur un tamis à bande qui évacue le non-tissé tangentiellement par rapport aux tambours.
  3. Procédé selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que
    les fibres sont soufflées dans une fente de formage symétrique ou asymétrique, les tambours présentant à cet effet des diamètres de tambours identiques ou différents avec un rapport du diamètre de l'ordre de 0,5 à 2,0.
  4. Procédé selon la revendication 3,
    caractérisé en ce que
    le diamètre de tambour des tambours est de l'ordre de 100 mm à 800 mm.
  5. Dispositif de fusion-soufflage, formage et dépôt de fibres sans fin pour former un non-tissé, comprenant une buse de fusion-soufflage (1) pour produire un flux de fibres et comprenant au moins un élément de formage (2) pour former une fente de formage (6) dans laquelle les fibres sont formées en un assemblage de fibres et sont évacuées,
    caractérisé en ce
    qu'entre la buse de fusion-soufflage (1) et la fente de formage (6) est réalisée une section de soufflage libre ajustable (B), la section de soufflage (B) étant orientée verticalement et pouvant être réglée par un réglage en hauteur de la buse de fusion-soufflage (1) et/ou de l'élément de formage (2) dans la plage de 100 mm à 2000 mm, la fente de formage (6) étant formée entre deux tambours (2.1, 2.2) avec des parois de tambours perméables à l'air (3), qui peuvent être entraînés en sens inverse avec une vitesse périphérique de l'ordre de 0,1 m/min à 50 m/min et, pour l'ajustement d'une section transversale de formage (F) au niveau de la fente de formage (6), une distance entre les tambours (2.1, 2.2) étant réalisée de manière réglable symétriquement ou asymétriquement dans une plage de 1 mm à 100 mm entre les tambours (2.1, 2.2).
  6. Dispositif selon la revendication 5,
    caractérisé en ce que
    sous les tambours (2.1, 2.2) est disposé un tamis à bande en mouvement (14), le tamis à bande (14) évacuant le non-tissé tangentiellement par rapport aux tambours (2.1, 2.2).
  7. Dispositif selon l'une quelconque des revendications 5 ou 6,
    caractérisé en ce que
    les tambours (2.1, 2.2), pour former une fente de formage symétrique ou asymétrique (6), présentent des diamètres de tambours identiques ou différents (D1, D2) avec un rapport de diamètre de l'ordre de 0,5 à 2,0.
  8. Dispositif selon la revendication 7,
    caractérisé en ce que
    les tambours (2.1, 2.2) présentent un diamètre de tambour de l'ordre de 100 mm à 800 mm.
  9. Dispositif selon l'une quelconque des revendications 5 à 8,
    caractérisé en ce que
    l'un des tambours (2.1, 2.2) ou les deux tambours (2.1, 2.2) présentent une chambre d'aspiration interne (4, 4') qui est connectée à une source de dépression (5, 5') et qui est protégée vers l'environnement par la paroi de tambour perméable à l'air (3).
  10. Dispositif selon la revendication 9,
    caractérisé en ce
    qu'une position angulaire des chambres d'aspiration (4, 4') au niveau de la périphérie du tambour (2.1, 2.2) peut être ajustée.
EP13718534.4A 2012-04-27 2013-04-15 Procédé et dispositif de fusion-soufflage, de formation et de dépôt de fibres finies pour obtenir un non-tissé Revoked EP2841634B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012008625 2012-04-27
PCT/EP2013/057777 WO2013160134A1 (fr) 2012-04-27 2013-04-15 Procédé et dispositif de fusion-soufflage, de formation et de dépôt de fibres finies pour obtenir un non-tissé

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Publication Number Publication Date
EP2841634A1 EP2841634A1 (fr) 2015-03-04
EP2841634B1 true EP2841634B1 (fr) 2018-06-06

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EP (1) EP2841634B1 (fr)
CN (1) CN104246045B (fr)
WO (1) WO2013160134A1 (fr)

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Publication number Priority date Publication date Assignee Title
WO2019104240A1 (fr) 2017-11-22 2019-05-31 Extrusion Group, LLC Ensemble embout de matrice et procédé de fusion-soufflage
DE102018005081A1 (de) * 2018-06-27 2020-01-02 Oerlikon Textile Gmbh & Co. Kg Verfahren zum Herstellen eines Meltblown-Vlieses und eine Meltblown-Anlage
CN212316388U (zh) * 2020-02-13 2021-01-08 上海捷英途新材料科技有限公司 一种熔喷滤布的生产装置
US11958308B1 (en) 2023-05-31 2024-04-16 G13 Innovation In Production Ltd Thermal paper, and methods and systems for forming the same

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DENIZ DURAN ET AL.: "Investigation of the Physical Characteristics of Polypropylene Meltblown Nonwovens under varying production parameters", THERMOPLASTIC ELASTOMERS, March 2012 (2012-03-01), pages 243 - 264, XP055574544

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CN104246045B (zh) 2016-11-02
EP2841634A1 (fr) 2015-03-04
CN104246045A (zh) 2014-12-24

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