EP1236818A1 - Verfahren und Vorrichtung zur Herstellung isotroper Vliesstoffe - Google Patents
Verfahren und Vorrichtung zur Herstellung isotroper Vliesstoffe Download PDFInfo
- Publication number
- EP1236818A1 EP1236818A1 EP02003777A EP02003777A EP1236818A1 EP 1236818 A1 EP1236818 A1 EP 1236818A1 EP 02003777 A EP02003777 A EP 02003777A EP 02003777 A EP02003777 A EP 02003777A EP 1236818 A1 EP1236818 A1 EP 1236818A1
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- EP
- European Patent Office
- Prior art keywords
- fleece
- partial
- nonwoven
- fiber
- faster
- 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.)
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Classifications
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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
- D04H1/44—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
- D04H1/52—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 applying or inserting filamentary binding elements
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G25/00—Lap-forming devices not integral with machines specified above
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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
- D04H1/70—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
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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
- D04H1/70—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)
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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
- D04H13/00—Other non-woven fabrics
Definitions
- the invention relates to a method for producing a in terms of strength and elongation in the longitudinal and transverse directions behave approximately the same, i.e. isotropic Nonwoven fabric and a corresponding manufacturing plant.
- nonwovens are used in the nonwoven process, especially with the widespread carding process, preferably longitudinal fibers prefer a higher one Strength and less elasticity in the longitudinal direction of the fibers possess compared to the corresponding Values in the direction transverse to the preferred fiber layer.
- This inequality the strength values in the longitudinal and transverse directions is independent of the type of consolidation for all nonwovens to observe does not only occur with thermal solidified, but also with mechanically consolidated Nonwovens, e.g. So with needle fleece or also with More nonwovens; the latter are at least on one Side of the nonwoven fabric meshed the fibers.
- the fibers are essentially transverse to the running direction this nonwoven web oriented with the consequence that the Strength now higher in the transverse direction than in the longitudinal direction is non-uniformity - albeit in reverse Form - in principle persists.
- the low longitudinal strength of the zigzag shape laid template can thus solidify through the mesh increases, thus reducing the non-uniformity.
- this approach can only be used to a very limited extent complete alignment of longitudinal and transverse strength is achieved become. And that depends on the approximation of the strength values in the longitudinal and transverse directions of the fiber mass of the Fleece per unit area and depending on the proportion of fibers, which are brought lengthwise by meshing can, i.e. on the degree of meshing. Otherwise, this type the manufacture of fleece to the mechanical solidification of the Non-woven fabric bound by meshing.
- Another, also in the field of active nonwovens proposal lying in accordance with DD 292 489 A5 uses several Fiber layers in the fleece with different orientations, parallel or crossing fibers running across the edge of the web. That is in the in the mentioned publication presented method the nonwoven fabric from two separate Layers built up, one of which preferably longitudinally oriented fibers and the other preferably has transversely oriented fibers.
- the different fiber layers are first produced by separate fleece formers and are after unification to a common fleece of a mechanical Fleece consolidation supplied by meshing.
- With such double-layered nonwovens can be used isotropic nonwovens with a high standing fiber content.
- this procedure requires two separate ones Laid former. Because of the necessary, considerable Investment costs are based on the area unit Cost price of the end product very expensive, so that the knitted nonwovens produced in this way may no longer competitive can be offered on the market.
- the object of the invention is a method and a system to demonstrate the manufacture of a nonwoven, which with respect the longitudinal and transverse directions are largely isotropic is, the maximum strength values parallel or transverse can be reached to the web side edge, which also at low Investment costs can be produced and which ones can solidify by any method.
- a two-layer fleece is made from one produced only fleece, the one Fiber layer predominantly longitudinally oriented fibers and the other zigzag-shaped fiber layer predominantly across contains oriented fibers.
- the zigzag fiber layer is deflected and combined with the other fiber layer.
- the invention relates to a system and a method for producing a multi-layer isotropic nonwoven, the in any way, preferably by meshing the near-surface Fibers, mechanically at least on one flat side is consolidated, with at least one layer in the template fleece is provided with transversely oriented fibers.
- the invention producible at low investment costs Nonwoven is said to be longitudinal and transverse behave largely isotropically, with the maximum strength values reached parallel or across the web edge become.
- the multi-layer full fleece 4 which is to be consolidated into a nonwoven fabric from at least one partial fleece 5 with essentially longitudinally oriented fibers 3 'and another, from one zigzag-shaped pile of existing cross-fiber partial fleece 1 with essentially transversely oriented fibers 3, such as this in perspective in Figure 1 for a two-layer template fleece is shown. It is not of primary importance here whether the cross-oriented partial fleece 1 or the lengthways oriented partial fleece 5 above or below in full fleece 4 lies. This is more a question of the hardening process used and the later use of the Nonwoven.
- the two sub-fleeces have rough Approximation of approximately the same basis weight. in the concrete case, however, will depend on the one used Solidification process and later use of the nonwoven fabric a distribution of the fiber quantities of the Nonwoven fabric on the two partial nonwovens 1 and 5 empirically choose.
- a three-layer template fleece 6 is in perspective shown, which is a "straight line” on the top and bottom Partial fleece 5 'or 5 "with predominantly longitudinally oriented Fibers 3 ', whereas the transverse fiber partial nonwoven arranged between them 1 "predominantly transversely oriented fibers 3 ' contains.
- the template fleece is a center arrangement of the cross fiber partial fleece 1 "essential.
- a device for dry fleece formation be provided, basically of any type can be, but it must be said restrictively that only such fleece-forming devices arrive in Bertracht to which at least two fleeces move locally at the same time or let Flore take off and for those also considerable Differences in the removal speed of the nonwovens possible are.
- fleece formation processes in particular to the book publication already mentioned above "Nonwovens - raw materials, manufacture, application, Properties, testing ", published by W. Albrecht, H. Fuchs, W.
- the fleece formation card 10 has two fleece pick-ups 11 and 12 arranged offset in height.
- the one, shown in Figure 3 below fleece taker 11 is designed due to the appropriate equipment of the sets on the take-off rollers in such a way that it allows a much higher removal speed v 2 of the partial fleece removed there than on the other fleece taker indicated in Figure 3 above 12; the decrease speed there is only v 1 .
- the ratio v 1 / v 2 of the two take-off speeds will be discussed in more detail below.
- the pile taken off at the lower, faster-running customer 11 is lighter according to the speed ratio in the basis weight than that at the other customer 12 slower removed pile 5.
- By zigzag-shaped laying of the faster partial fleece to a slower-running cross-fiber partial fleece 1 however, its basis weight is increased again in accordance with the speed ratio v 1 / v 2 .
- the faster partial fleece 2 is shown in all in FIGS. 4 and 5 shown variants of the invention at least indirectly a fleece laying device 14, 22 and 45 associated with which the faster partial fleece 2 zigzag-shaped to one Cross fiber partial fleece 1 can be placed.
- the partial fleece is the fleece laying device in any case by conveyor belts fed what, however, in the simplified, principle 3 and 5 is not shown.
- Conveyor belt 21 for feeding the faster partial fleece 2 to the fleece laying device 22. Because of the zigzag shape Laying the faster partial fleece 2 becomes a cross-fiber partial fleece 1 with preferably transverse to the longitudinal direction of the Nonwoven web oriented fibers 3 generated.
- the faster partial nonwoven 2 must be removed from the nonwoven forming device at a speed v 2 that is a corresponding integer multiple times greater than the slower partial nonwoven with the removal speed v 1 .
- the ratio of the removal speeds or the reciprocal v 2 / v 1 already mentioned is therefore preferably two, three, four or five.
- the two fleece takers 11 and 12 running at different speeds must therefore run regardless of their possibly changing absolute speed with a fixed speed ratio according to one of the values mentioned.
- the higher the speed ratio v 2 / v 1 the smaller the possible angle ⁇ between the zigzag-shaped partial layers within the transverse fiber partial fleece 1 and the more the fibers 3 of the output pile are actually transversely within the transverse fiber partial fleece 1 oriented.
- an excessively high speed ratio v 2 / v 1 of the fleece takers 11 and 12 not only causes problems with the fleece removal but also with the zigzag-shaped laying of the cross fiber partial fleece 1.
- a further increase would only increase the technical and operational difficulties and hardly bring any further advantages to the finished nonwoven in terms of textile technology.
- a plant and process component essential to the invention in the present case is the fleece deflection device 17, 28 or 43, in all different embodiments is provided, albeit in different assignments. It is common to all exemplary embodiments that the Fleece deflection device 17, 28 or 43, regardless of to which the sub-fleece it is assigned, in any case that assigned partial fleece with regard to its seen in the floor plan Direction of travel deflected by a right angle. Furthermore, in agreement for all embodiments is that the Fleece deflector with regard to its deflecting Part, namely the fleece deflecting rod 18, 30 or 43 - in Floor plan seen - roughly the same position as the effective part the respective fleece laying device 14, 22 and 45 for the faster partial fleece and arranged at different heights is.
- the fleece deflecting device 17, which is shown in simplified form only with the fleece deflecting rod 18, is assigned to the faster partial fleece and is functionally arranged in front of the fleece laying device 14.
- the faster partial fleece 2 is "temporarily” brought in a direction transverse to the working direction 7 and the transverse fiber partial fleece 1 is laid out from this transverse direction, which also results in a process-immanent manner - A 90 ° deflection takes place.
- the faster partial nonwoven 2 or the transverse fiber partial nonwoven 1 is deflected twice in its course — as seen in the plan — with these two deflections being compensated for in the result.
- the running direction 8 of the combined full nonwoven 4 coincides - seen in plan - with the working direction 7 of the nonwoven formation card 10; both directions 7 and 8 are arranged in a common line of alignment.
- the slower partial fleece 5 is transported by means of a fleece conveyor belt 15 over the fleece deflection device 17 and the fleece laying device 14 arranged underneath.
- the fleece deflection device 28 is also assigned to the running of faster partial fleece 2 or transverse fiber partial fleece 1 in the system according to FIG.
- the fleece deflection device 28 is assigned to the transverse fiber partial fleece 1 and is functionally arranged according to the fleece laying device.
- the fleece deflection device 28 is shown completely, albeit limited to the functionally essential parts, in FIG. 4, which will be discussed in more detail below.
- the fleece laying device 22, which is designed as a flat horizontal laying device in the manner of a wagoner, is also shown in more detail in FIG. 4, even if it is only shown in the functionally essential elements.
- the faster partial nonwoven 2 is fed to the nonwoven laying device 22 on a nonwoven conveyor belt 21 and deposited there on a pair of vertically offset and vertically spaced, ie non-contacting intermediate conveyor belts 24, 24 'of an upper carriage (belt 24) and a laying carriage (belt 24') with laying rollers 25 , which move synchronously but counter to each other horizontally in time with the zigzag-shaped laying.
- the faster partial fleece 2 (speed v 2 ) is placed on the fleece conveyor belt 23, which moves transversely to the conveyor belt 21 and the intermediate belts 24, 24 'at the slower speed v 1, in a zigzag shape and in a web width that matches the original width ,
- a stroke distance 26 is provided by a clever arrangement of deflection and guide rollers the belt run of the fleece conveyor belt 23 L-shaped and angled into the steep upward stroke is transferred.
- an L-shaped support band 27 provided, which with a steep Part of the conveyor belt of the nonwoven conveyor belt, which is effective in conveying 23 is touching in the area of the stroke 26.
- the Cross-fiber partial fleece is therefore in the stroke distance between Fleece conveyor belt 23 and touching support belt 27 held and transported upwards.
- the upper leg of the L-shaped guided support band 27 extends approximately horizontally and above the fleece deflecting device 28 Run of the fleece conveyor belt 23 of the stroke section 26 is sufficient slightly in this approximately horizontal leg of the Support belt 27 into it, so that the cross-fiber partial fleece conveyed upwards can be stored there. From the horizontal The leg of the support tape becomes the cross-fiber partial fleece then on the guide belt 32 of the fleece deflection device 28 to hand over.
- the fleece deflection device shown in more detail in FIG. 4 28 consists essentially of a driven, in a rectangle guided over non-rotating turning bars 29, 30, endless guide band 32. Adjacent, at one each Turning bar, merging dreams of the guide belt close one with their side edges - seen in plan - At least approximately a right angle, but the respective flat sides of the guide belt essentially are arranged parallel to each other. Such leadership of the Belt is only possible with the same belt run if a sliding deflection takes place on the turning bars. The turning bars must therefore not rotate. Conveniently, it is superficially smooth and hardened Tube.
- the guide belt 32 of the fleece deflection device 28 is driven at the speed of the associated partial fleece, which in the exemplary embodiment shown in FIG. 4 is carried out by a plurality of drive roller pairs 31, one of which is arranged on this side and the other on the other side of the guide belt.
- the required running speed of the guide belt 32 is the - lower - speed v 1 of the transverse fiber partial fleece 1.
- the fleece deflection device 43 is assigned to the slower partial fleece 5 , this is driven at the lower speed v 1 of this partial fleece.
- the nonwoven deflection device 17 assigned to the faster partial nonwoven 2 and must therefore be driven at the higher speed v 2 of this partial nonwoven, which could prove to be a certain disadvantage, at least if there are no friction-reducing devices on the turning bars.
- the turning bars 29, 30 can be wrapped in the guide belt Area each with a variety of grid-like distributed, friction-reducing devices be provided. This can be in the pipe wall of the turning bars, but freely movable balls that are held captive act on the guide band can roll away.
- Another way to Reduced friction is a nationwide Air cushion in the contact area between turning bar 29, 30 and build up the guide band 32. In this case, that would be the area wrapped around by the guide band is distributed in a grid pattern arranged air outlet holes to be arranged, those from the inside the tubular turning bars made of compressed air in the Excess is supplied.
- the guide band then swims to a certain extent on a compressed air film that is also a dissipates any frictional heat.
- the risk of electrostatic The guide belt would also be less charged, especially if the compressed air were well humidified. Though the guide belt 32 could be almost thanks to the compressed air film Lead over the turning bars without resistance, however would need a certain amount to generate the necessary compressed air Power can be applied, however, without further ado can be accepted.
- the special fleece deflecting rod 30 is also - in plan seen - about the same position as the fleece laying device 22 and arranged above it.
- the fleece deflection device essential to the invention has except the deflection of the partial fleece at least in the embodiment according to Figure 4 also the task of an exact match of the two partial fleece to be combined in the width direction herbeizughaken.
- non-rotating turning bars 29, 30 at least one turning bar parallel to the plane the adjacent dreams can be swiveled in the sense of a tape run correction stored and with an appropriate swivel drive Mistake.
- the fleece deflecting rod 30 immediately arranged at the confluence of the two sub-fleeces 1 and 5 would be the fleece deflecting rod 30 for the tape running correction most appropriate in so far as it is with the least Time delay between rule intervention and new one Belt run position a control-related width positioning would enable.
- the guide belt of the fleece deflection device in terms of a broad control positioning technology good can operate, the guide belt must be thermal regardless or age-related stretching or shrinking be kept under a certain band tension.
- the purpose is two adjacent turning bars of the fleece deflection device 28 parallel to the plane of the adjacent dreams in For the purpose of tensioning the guide belt 32, it is displaceably mounted and provided with a corresponding displacement drive.
- the two are expediently displaceable in this sense Turning bars parallel to the two opposite Sides of the spanned by the turning bars Rectangular.
- the transverse layer partial fleece 1 below and the slower partial fleece 5 is arranged at the top.
- the fleece transport pand 20 which carries the slower partial fleece 5, via the fleece deflection device 28 away and to a further back in the plant provided on a separate fleece transport belt Association office to be continued.
- this separate one according to the direction of further processing 8 aligned fleece transport pand installed on which this is in the direction of further processing deflected transverse layer partial fleece 1 from the fleece deflection device 28 can be filed.
- the fleece laying device 45 places the zigzag-shaped Partial layers of the cross fiber partial fleece 1 on the lower one Fleece conveyor belt 46, which is also parallel to Processing direction 8 runs. Again, here are the fleece deflecting rod 43 and the fleece laying device 45 offset in height from each other but - in the floor plan - the same position arranged. That on the upper fleece conveyor belt 44 slower partial fleece transported on a downward gradient 5 is placed on the lower fleece conveyor belt 46 Cross fiber partial fleece 1 to the two-layer full fleece 4 merged, which then solidified into a nonwoven can be.
- the fleece conveyor belt 44 when integrated accordingly Fleece edge detectors and adjustable belt guide rollers inside of the tape run can be used, a matching Transverse position of the slower partial fleece 5 with the To bring about cross fiber partial fleece 1.
- the production plant indicated in Figure 5 runs - in In contrast to the straight-line systems according to FIGS. 3 or 4 - angled as a whole; the working direction 7 of Fleece formation card and the further processing direction 8 form a right angle with each other.
- Guide belt 51 of the fleece deflection device 50 saves space in two different, spaced from each other Levels. And that's on the fleece deflecting rod 54 running run of the guide belt and in the in the same horizontal plane opposite, parallel One strand of each strand wrapped at 180 ° Deflection roller 52, 52 'arranged. The diameter this deflection roller determines the distance between the two levels of the guide belt 51.
- the fleece deflection device 50 according to FIG. 6 has the further advantage a compact design. This means that the supporting structure for the individual components such as rollers, turning bars etc.. is more compact and stiffer.
- the deflection rollers 52, 52 are two at least in plan view approximately congruent but about the roller diameter offset in height, i.e. close to each other.
- the deflection rollers 52, 52 After this here two opposite strands of the guide belt the deflection rollers 52, 52 'tightly wrapped around, it offers itself from this deflecting rollers at least one for driving the guide belt 51 to use the fleece deflector and with to provide a corresponding rotary drive. If both deflection rollers 52, 52 'used to drive the guide belt should be taken into account that both guide rollers equally fast, but in the opposite direction have to circulate. To synchronize the two to be driven Deflection rollers would be a reversing gear in this case with a 1: 1 ratio between the two guide rollers makes sense.
- the deflection rollers can also can be used to tension the guide tape by can be moved linearly in the direction of the dreams that surround it stored and provided with a corresponding slide drive are.
- the faster partial fleece 2 removed from the faster fleece taker is laid in a zigzag shape to the transverse fiber partial fleece 1, with a process-inherent deflection taking place.
- the transverse fiber partial nonwoven 1 and the slower partial nonwovens 5 ', 5 are brought into mutual agreement with respect to their running, for which the exemplary embodiments shown in FIGS. 3, 4 or 5 can serve as a model.
- the three partial nonwovens 5', 1 and 5 are then combined with one another at the same speed v 1 , the same direction and the same transverse position to form a three-layer full nonwoven 6, which can finally be consolidated into a nonwoven.
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Abstract
Description
- Fig. 1
- eine perspektivische Darstellung eines zweilagigen Vorlagevlieses zur Bildung eines Vliesstoffes, welches aus einer unteren Vlieslage mit längs orientierten Fasern und aus dem oben liegenden Querfaser-Teilvlies zusammengesetzt ist,
- Fig. 2
- eine perspektivische Darstellung eines dreilagigen Vorlagevlieses mit mittig angeordnetem Querfaser-Teilvlies und oberer und unterer Vlieslage mit längs orientierten Fasern,
- Fig. 3
- ein erstes Ausführungsbeispiel einer Anlage zur Herstellung eines mehrlagigen, isotropen Vliesstoffes, bei dem die Arbeitsrichtung der Vliesbildungseinrichtung und die Einrichtung zur Verfestigung des Vliesstoffes in einer geradlinigen Flucht liegen, bei der allerdings im Zuge des schnelleren bzw. des Querfaser-Teilvlieses eine zweimalige, sich kompensierende Umlenkung um 90° stattfindet, nämlich zuerst eine bloße Umlenkung des schnelleren Teilvlieses in eine quer verlaufende Richtung und dann eine prozeß-immanente 90°-Umlenkung durch das zick-zack-förmige Legen des schnelleren Teilvlieses zu dem Querfaser-Teilvlies,
- Fig. 4
- ein zweites Ausführungsbeispiel einer Anlage zur Herstellung eines mehrlagigen, isotropen Vliesstoffes mit ebenfalls fluchtender Arbeitsrichtung bezüglich Vliesbildung und Weiterverarbeitung des Vollvlieses, wobei ebenfalls im Zuge des schnelleren bzw. des Querfaser-Teilvlieses eine zweimalige, sich kompensierende Umlenkung um 90° stattfindet, und zwar hier zuerst das zickzakförmige Legen des schnelleren Teilvlieses zu dem Querfaser-Teilvlies unter einer ersten 90°-Umlenkung und dann eine weitere Umlenkung dessellben zurück in die ursprüngliche Richtung,
- Fig. 5
- ein drittes Ausführungsbeispiel einer Anlage zur Herstellung eines mehrlagigen, isotropen Vliesstoffes, bei dem die Arbeitsrichtung des Vliesbildungseinrichtung einerseits und die der Einrichtung zur Verfestigung des Vliesstoffes andererseits rechtwinklig zueinander angeordnet sind und bei der sowohl im Zuge des langsameren Teilvlieses als auch im Zuge des Querfaser-Teilvlieses jeweils eine Umlenkung um 90° stattfindet, und zwar beim Querfaser-Teilvlies bedingt durch das zickzakförmige Legen und beim langsameren Teilvlies bedingt durch das Erfordernis nach einer übereinstimmenden Laufrichtung und Querpostion,
- Fig. 6
- eine perspektivische, isolierte Darstellung einer raumsparend ausgebildeten Vliesumlenkeinrichtung.
Claims (19)
- Verfahren zum Herstellen eines Vliesstoffes, umfassend folgende Verfahrensschritte:auf einer Vliesbildungseinrichtung (10) mit zwei Vliesabnehmern (11, 12) werden in ein und demselben Vliesbildungsprozeß aus den gleichen Rohfasern bzw. Rohfasergemisch zwei separate Teilvliese (2, 5) gebildet,> das schnellere Teilvlies (2) wird zick-zack-förmig zu einem neuen Teilvlies - im folgenden "Querfaser-Teilvlies (1)" genannt - mit einer mit der Breite des langsameren Teilvlieses (5) übereinstimmenden Breite und bei einer mit der Laufgeschwindigkeit (v1) des langsameren Teilvlieses (5) übereinstimmenden Geschwindigkeit (v1) gelegt, wobei die Fasern (3) bevorzugt quer zur Längsrichtung des Querfaser-Teilvlieses (1) orientiert werden,> das so vorgelegte Vollvlies (4) wird zu einem Vliesstoff verfestigt (13).
- Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß
das schnellere Teilvlies (2) zunächst in eine quer zur Arbeitsrichtung (7) der Vliesbildungseinrichtung (10) liegende Laufrichtung umgelenkt (17) und erst aus dieser Laufrichtung heraus zick-zack-förmig zu dem Querfaser-Teilvlies (1) gelegt und dabei prozeß-immanent erneut umgelenkt wird (14), so daß dessen Laufrichtung - im Grundriß gesehen - mit der Arbeitsrichtung (7) der Vliesbildungseinrichtung (10) in einer Flucht liegt, daß das langsamere Teilvlies (5) an der Vliesumlenkeinrichtung (17) für das schnellere Teilvlies und an der Vlieslegevorrichtung (14) zum Legen des Querfaser-Teilvlieses vorbeigeführt und anschließend beide Teilvliese zu dem Vollvlies (4) vereinigt werden. (Figur 3) - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß
das schnellere Teilvlies (2) unmittelbar zu dem Querfaser-Teilvlies (1) zick-zack-förmig gelegt und dabei prozeß-immanent in eine quer zur Arbeitsrichtung (7) der Vliesbildungseinrichtung (10) liegende Arbeitsrichtung umgelenkt wird und daß das Querfaser-Teilvlies (1) anschließend aus dieser quer verlaufenden Arbeitsrichtung wieder in eine parallel zur Arbeitsrichtung (7) der Vliesbildungseinrichtung (10) und in eine übereinstimmende Flucht mit dem langsameren Teilvlies (5) umgelenkt wird. (Figur 4) - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß
das schnellere Teilvlies (2) unmittelbar zu dem Querfaser-Teilvlies (1) zick-zack-förmig gelegt und dabei prozeß-immanent in eine quer zur Arbeitsrichtung (7) der Vliesbildungseinrichtung (10) liegende Arbeitsrichtung umgelenkt wird und daß auch das langsamere Teilvlies (5) in diese quer verlaufenden Arbeitsrichtung und in eine übereinstimmende Flucht mit dem Querfaser-Teilvlies (1) umgelenkt wird. (Figur 5) - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß
die zick-zack-förmigen Teillagen innerhalb des Querfaser-Teilvlieses (1) unter einem solchen Winkel (α) abgelegt werden, dessen Sinuswert dem Wert eines echten Bruches der Form l/n mit n als ganzer Zahl unter 7 entspricht. - Verfahren nach Anspruch 5,
dadurch gekennzeichnet, daß
die zick-zack-förmigen Teillagen innerhalb des Querfaser-Teilvlieses wahlweise unter einem der nachfolgend genannten Winkel (α) abgelegt werden: 30,0° (sin α = ½), ca. 19,5° (sin α = 1/3), ca. 14,5° (sin α = ¼) oder ca. 11,5° (sin α = 1/5). - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß
das schnellere Teilvlies (2) mit einer um ein ganzzahliges Vielfaches größeren Geschwindigkeit (v2) von der Vliesbildungseinrichtung (10) abgenommen wird, als das langsamere Teilvlies (5, Geschwindigkeit v1), und zwar vorzugsweise mit der zwei-, drei-, vier- oder fünffachen Geschwindigkeit (v2). - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß
von der Vliesbildungseinrichtung (10) für das schnellere Teilvlies (2) in grober, eine Ungleichheit von ±20 Gew.-% zulassenden Näherung eine etwa gleichgroße Fasermasse je Zeiteinheit abgenommenen wird wie für das langsamere Teilvlies (5). - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß
das schnellere Teilvlies (2) an einem in Höhenposition tiefer gelegenen Vliesabnehmer (11) von der Vliesbildungseinrichtung (10) abgenommen wird und das langsamere Teilvlies (5) an einem in Höhenposition höher gelegenen Vliesabnehmer (12). - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß
auf einer Vliesbildungseinrichtung in ein und demselben Vliesbildungsprozeß aus den gleichen Rohfasern bzw. Rohfasergemisch drei separate Teilvliese (5', 1, 5") gebildet und jeweils an drei verschiedenen, höhenversetzt angeordneten Vliesabnehmern abgenommen werden, wobei das an dem einen, vorzugsweise mittleren Vliesabnehmer abgenommene schnellere Teilvlies mit der mehrfach höheren Geschwindigkeit (v2) als die beiden anderen, langsameren Teilvliese (5', 5") aus dem Vliesbildungsprozeß abgenommen werden, daß das schnellere Teilvlies zick-zack-förmig zu dem Querfaser-Teilvlies (1) gelegt wird, daß anschließend das Querfaser-Teilvlies (1) und die langsameren Teilvliese (5', 5") bezüglich ihres Laufes in gegenseitige Übereinstimmung gebracht und bei untereinander gleicher Geschwindigkeit (v1), gleicher Richtung und gleicher Querposition zu einem dreilagigen Vollvlies (6) vereinigt werden und dieses zu einem Vliesstoff verfestigt wird. - Anlage zum Herstellen eines Vliesstoffes, umfassend folgende Anlagenkomponenten:> eine dem schnelleren Vliesabnehmer (11) zugeordnete und mit ihm durch Vliestransportbänder verbundene Vlieslegevorrichtung (14, 22, 45) zum zick-zack-förmigen Legen des schnelleren Teilvlieses (2) zu einem neuen, nachfolgend "Querfaser-Teilvlies (1)" genannten Teilvlies mit einer mit der ursprünglichen Breite des schnelleren Teilvlieses (2) übereinstimmenden Breite und mit bevorzugt quer zur Längsrichtung des Querfaser-Teilvlieses (1) orientierten Fasern (3),> eine weitere Vorrichtung (17, 28, 43) zum Ausrichten des Querfaser-Teilvlieses (1) zu dem langsameren Teilvlies (5) bei gleicher Geschwindigkeit (v1), gleicher Richtung sowie gleicher Querposition zwecks Zusammenführen zu einem nachfolgend Vollvlies (4) genannten mehrlagigen Vlies,
- Anlage nach Anspruch 11,
dadurch gekennzeichnet, daß
die Vorrichtung zum gegenseitigen Ausrichten von Querfaser-Teilvlies (1) und langsameren Teilvlies (5) zwecks Zusammenführen der Teilvliese (1, 5) zu dem Vollvlies (4) eine einem der Teilvliese (2, 5 bzw. 1) zugeordnete, höhenversetzt zur Vlieslegevorrichtung (14, 22, 45) angeordnete Vliesumlenkeinrichtung (17, 28, 43) enthält, welche das zugeordnete Teilvlies (2, 1, 5) bezüglich seiner im Grundriß gesehenen Laufrichtung um einen rechten Winkel umlenkt, wobei die Vliesumlenkeinrichtung (17, 28, 43) bezüglich ihres umlenkwirksamen (18, 30, 43) Teils - im Grundriß gesehen - etwa positionsgleich zum wirksamen Teil der Vlieslegevorrichtung (14, 22, 45) für das schnellere Teilvlies (2) angeordnet ist. - Anlage nach Anspruch 11,
dadurch gekennzeichnet, daß
die Vliesumlenkeinrichtung (17) dem schnelleren Teilvlies (2) zugeordnet und funktionell der Vlieslegevorrichtung (14) vorgeordnet ist, derart daß im Lauf des schnelleren Teilvlieses (2) bzw. Querfaser-Teilvlieses (1) aufgrund einer zweimaligen, sich im Ergebnis kompensierenden Umlenkung die Laufrichtung (8) des vereinigten Vollvlieses (4) im Grundriß mit der Arbeitsrichtung (7) der Vliesbildungskrempel (10) in einer übereinstimmenden Fluchtlinie angeordnet ist. (Figur 3) - Anlage nach Anspruch 11,
dadurch gekennzeichnet, daß
die Vliesumlenkeinrichtung (28) dem Querfaser-Teilvlies (1) zugeordnet und funktionell der Vlieslegevorrichtung (22) nachgeordnet ist, derart daß im Lauf des schnelleren Teilvlieses (2) bzw. Querfaser-Teilvlieses (1) aufgrund einer zweimaligen, sich im Ergebnis kompensierenden Umlenkung die Laufrichtung (8) des vereinigten Vollvlieses (4) im Grundriß mit der Arbeitsrichtung (7) der Vliesbildungskrempel (10) in einer übereinstimmenden Fluchtlinie (8) angeordnet ist. (Figur 4) - Anlage nach Anspruch 11,
dadurch gekennzeichnet, daß
die Vliesumlenkeinrichtung (43) dem langsameren Teilvlies (5) zugeordnet ist und daß sowohl die im Grundriß erkennbare Laufrichtung des langsameren Teilvlieses (5) - und zwar durch die Vliesumlenkeinrichtung (43) - als auch die des schnelleren Teilvlieses (2) und des daraus hervorgehenden Querfaser-Teilvlieses (1) - und zwar durch die Vlieslegevorrichtung (45) - jeweils um 90° umgelenkt werden, so daß die Laufrichtung (8) des aus den Teilvliesen (1 und 5) vereinigten Vollvlieses (4) im Grundriß quer zur Arbeitsrichtung (7) der Vliesbildungskrempel (10) angeordnet ist. (Figur 5) - Anlage nach Anspruch 11,
dadurch gekennzeichnet, daß
die höhenversetzt zur Vlieslegevorrichtung (22) angeordnete Vliesumlenkeinrichtung (28) im wesentlichen aus einem angetriebenen, in einem viereckigen Polygon, vorzugsweise in einem Rechteck über nicht rotierende Wendestangen (29, 30) geführten, endlosen Führungsband (32) besteht, deren benachbarte, an je einer Wendestange ineinander übergehende Trume bezüglich der Seitenkanten des Führungsbandes (32) zwar einen - im Grundriß gesehen - zumindest angenähert rechten Winkel miteinander einschließen, die aber mit der jeweilige Flachseite des Führungsbandes (32) im wesentlichen parallel zueinander angeordnet sind, wobei eine (30) der vier Wendestangen (29, 30), nachfolgend Vliesumlenkstange (30) genannt, im Grundriß gesehen etwa positionsgleich zur Vlieslegevorrichtung (22) angeordnet ist und wobei das umzulenkende Teilvlies (1) durch die beiden an der Vliesumlenkstange (30) zusammenlaufenden Trume des Führungsbandes (32) geführt ist und mit ihm umgelenkt wird. - Anlage nach Anspruch 11,
dadurch gekennzeichnet, daß
das Führungsband (32) der Vliesumlenkeinrichtung (17, 28, 43) mit der Geschwindigkeit (v1, v2) des zugeordneten Teilvlieses (2, 1, 5) angetrieben ist. - Anlage nach Anspruch 11,
dadurch gekennzeichnet, daß
die Wendestangen (29, 30) in dem vom Führungsband (32) umschlungenen Bereich jeweils mit einer Vielzahl von rasterartig verteilt angeordneten, reibungsvermindernden Einrichtungen versehen sind. - Anlage nach Anspruch 11,
dadurch gekennzeichnet, daß
das Führungsband (51) der Vliesumlenkeinrichtung (50) platzsparend in zwei verschiedenen, zueinander geneigt angeordneten oder zueinander beabstandeten Ebenen geführt ist, indem an dem von der Vliesumlenkstange (54) ablaufenden Trum des Führungsbandes (51) und in dem diametral gegenüberliegenden Trum etwa mittig jeweils eine von diesen Trum zu 90° oder zu 180° umschlungene Umlenkwalze (52, 52') angeordnet ist.
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DE10109476A DE10109476C1 (de) | 2001-02-28 | 2001-02-28 | Verfahren und Vorrichtung zum Herstellen isotroper Vliesstoffe |
DE10109476 | 2001-02-28 |
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EP1236818B1 EP1236818B1 (de) | 2005-04-20 |
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US (1) | US20020116793A1 (de) |
EP (1) | EP1236818B1 (de) |
AT (1) | ATE293712T1 (de) |
DE (2) | DE10109476C1 (de) |
ES (1) | ES2236373T3 (de) |
PL (1) | PL352500A1 (de) |
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EP1595981A1 (de) * | 2004-04-05 | 2005-11-16 | Oskar Dilo Maschinenfabrik KG | Verfahren und vorrichtung zum erzeugen einer faservliesbahn |
WO2009024393A1 (de) * | 2007-08-22 | 2009-02-26 | Eswegee Vliesstoff Gmbh | Verfahren zur herstellung eines grundvliesstoffes als beschichtungsträger |
WO2009024396A1 (de) * | 2007-08-22 | 2009-02-26 | Eswegee Vliesstoff Gmbh | Grundvlies für trilaminate |
CN102002815A (zh) * | 2010-11-03 | 2011-04-06 | 羿蕾 | 具有双向可伸缩的直立结构纤维棉及生产装置和方法 |
WO2014053778A1 (fr) * | 2012-10-04 | 2014-04-10 | Saint-Gobain Isover | Installation et procédé pour fabriquer un produit d'isolation thermique et/ou phonique |
US10703668B2 (en) | 2011-09-30 | 2020-07-07 | Owens Corning Intellectual Capital, Llc | Method of forming a web from fibrous material |
EP1936016B1 (de) | 2006-12-22 | 2020-10-21 | Andritz Asselin-Thibeau | Verfahren zur Einstellung der lokalen Eigenschaften eines Vliesstoffs und entsprechende Anlage |
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DE102010034777A1 (de) * | 2010-08-18 | 2012-02-23 | Hubert Hergeth | Vlieslegemaschine und Verfahren zum Legen eines Vlieses |
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EP1595981A1 (de) * | 2004-04-05 | 2005-11-16 | Oskar Dilo Maschinenfabrik KG | Verfahren und vorrichtung zum erzeugen einer faservliesbahn |
EP1936016B1 (de) | 2006-12-22 | 2020-10-21 | Andritz Asselin-Thibeau | Verfahren zur Einstellung der lokalen Eigenschaften eines Vliesstoffs und entsprechende Anlage |
WO2009024393A1 (de) * | 2007-08-22 | 2009-02-26 | Eswegee Vliesstoff Gmbh | Verfahren zur herstellung eines grundvliesstoffes als beschichtungsträger |
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Also Published As
Publication number | Publication date |
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DE10109476C1 (de) | 2002-06-27 |
PL352500A1 (en) | 2002-09-09 |
EP1236818B1 (de) | 2005-04-20 |
US20020116793A1 (en) | 2002-08-29 |
ES2236373T3 (es) | 2005-07-16 |
ATE293712T1 (de) | 2005-05-15 |
DE50202821D1 (de) | 2005-05-25 |
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