EP1358369B1 - Verfahren und vorrichtung zur herstellung von im wesentlichen endlosen feinen fäden - Google Patents
Verfahren und vorrichtung zur herstellung von im wesentlichen endlosen feinen fäden Download PDFInfo
- Publication number
- EP1358369B1 EP1358369B1 EP01985429A EP01985429A EP1358369B1 EP 1358369 B1 EP1358369 B1 EP 1358369B1 EP 01985429 A EP01985429 A EP 01985429A EP 01985429 A EP01985429 A EP 01985429A EP 1358369 B1 EP1358369 B1 EP 1358369B1
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- EP
- European Patent Office
- Prior art keywords
- spinning
- threads
- thread
- laval nozzle
- nozzle
- 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
-
- 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
- D01D5/12—Stretch-spinning methods
- D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
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- 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
- D01D4/00—Spinnerette packs; Cleaning thereof
- D01D4/02—Spinnerettes
- D01D4/025—Melt-blowing or solution-blowing dies
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
Definitions
- the invention relates to a method for manufacturing of fine threads from solutions of polymers natural or synthetic origin and devices for their manufacture.
- Fine threads also called micro threads, mostly however Microfibers of finite length are made after a Hot air blow spinning process, so-called meltblown process, manufactured for many years, and it today there are different devices for this. It is all the same that in addition to a series of melt holes - also several rows parallel to each other have become known - hot air escapes the Warps. By mixing with the colder Ambient air cools and solidifies of these threads or finally long fibers, because often, Mostly undesirable, the threads break.
- the disadvantage of this meltblown process is the high level Energy expenditure for heating the at high speed flowing hot air, limited flow through the individual spinning holes (even if these have become increasingly dense over time up to a distance of less than 0.6 mm at 0.25 mm in Hole diameter) that it is under thread diameters 3 ⁇ m comes off, resulting in beads and protruding Fibers in the later textile composite leads, and that the polymers through the to produce fine threads necessary high air temperature well above the Melt temperature can be thermally damaged.
- the Spinnerets a large number of which are proposed and have also been protected are complex Injection molds that are manufactured with high precision Need to become. They are expensive, operationally vulnerable and expensive to clean.
- meltblown processes are also for education known from finally long fibers from Lyocell materials become, i.e. from a solvent, mostly NMMO (N-methylmorpholine-N-oxide), dissolved cellulose spun, e.g. WO98 / 26122, WO98 / 07911, WO99 / 47,733th
- NMMO N-methylmorpholine-N-oxide
- dissolved cellulose spun e.g. WO98 / 26122, WO98 / 07911, WO99 / 47,733th
- the present invention is therefore the object based, improved methods and devices for Production of fine threads from solutions of polymers to create that are essentially endless not thermally damaged by gas streams drawing out will need little energy and by a spinning tool that is simple in its construction can be produced.
- the threads can continue to warp after the point of splice until they are frozen. This happens because of the suddenly created larger thread area very quickly.
- the threads are endless. It can be in child Dimensions due to technical interference finally long threads come, are predominant but the endless fine filaments.
- the spinning masses used in DE 199 29 709 are meltable polymers. There are synthetic ones or of natural origin. Among those on natural Fibers based fibers are especially those of the of renewable raw material cellulose of interest.
- a special feature of the method according to the invention is that the accompanying gas, usually air flow the liquid filament threads shortly after their Accompany the exit from the spinning bore and through Distortion of shear stress. This gives them one Orientation and a cool down, both of which are increasing Strength and reducing the harmful Demolitions, even until they are completely prevented leads.
- By mixing the gas flow with the surrounding atmosphere, mostly also air, is delayed the gas flow and the threads are subject to each other no longer the initial tension due to the higher one Speed of the same, but remain endless and even when torn off by the air flow carried away. It is still the threads of the initial one Solution mass, if not already by blowing from e.g. Steam or water with the precipitation of the cellulose starts.
- threads can be on a screen belt filed and from the accompanying gas flow, such as known in spunbonded nonwoven processes, separated, whereby the gas (air) passes through the screen belt and below the same is suctioned off and the threads for Fleece deposited now only fed to the precipitation bath become.
- gas air
- the thread formation and storage room is easily accessible because of distances of 1 and 2 m between the nozzle outlet and the fall arrester are.
- polylactide PLA polylactic acid
- PLA materials have the special property that they are biodegradable, whereby the decomposition, ie the decomposition into CO 2 and H 2 O, can also be set for a certain period of time, and that they are body-friendly.
- the splice spinning process it is possible to produce very fine threads with the splice spinning process, which can otherwise only be obtained with the disadvantages of the melt-blown process - large amounts of air have to be raised to at least melt temperature, whereby the polymers are mostly damaged.
- the film splits open and piles are formed of essentially endless threads, however in contrast to those spliced from monofilaments of very different diameters and nodular Thickening. These still arise molten state of the textile materials and can within certain limits by the main process parameters Melt temperature, melt flow rate and extruding Gases - mostly air flows - within certain limits can be set. Individual threads that then can also be wound up by splicing not made from films, but nonwovens are.
- the area of strong acceleration and pressure reduction in the gas flow according to the invention in Shape of a rotationally symmetrical or elongated Laval nozzle with a convergent contour to a narrowest Cross section there and then rapid expansion realized, the latter already side by side running newly formed single threads not to the Can stick to walls.
- the narrowest cross section can with appropriate selection of the pressure in the chamber (in air about twice as high as the ambient pressure behind it) speed of sound and in the extended Part of the Laval nozzle is supersonic.
- thread fleeces spun fleeces
- spinning bores arranged in rows and in rectangular or with slot shape and Laval nozzles with rectangular cross-section used.
- yarns and for special types nonwoven fabrication can also use round nozzles one or more spinning bores and rotationally symmetrical Laval nozzles are used.
- the advantage of the present invention is that in a simple and economical way fine threads in Range below 10 ⁇ m, for example between 2 and 5 ⁇ m, can be generated, what with pure warping through the meltblown process only with hot, gas (air) jets heated above the melting point Is brought about and thus considerably more energy requirement.
- the threads in their molecular Structure not damaged by overheating, which would result in reduced strength, causing they often rub themselves out of a textile bandage to let.
- Another advantage is that the threads are endless or quasi endless and from one textile bandage such as a fleece does not stick out and can be removed as lint.
- the device to implement the method according to the invention is simple.
- the spinning holes of the spinneret just like the slot nozzle can be bigger and therefore the Laval nozzle cross-section is less prone to failure its accuracy does not require the narrow tolerances the side louvers of the meltblown process.
- a further development of the invention is the solution cone, round as a monofilament or wedge-shaped as a film cooling down as little as possible and above out to warm it up to a higher temperature.
- heaters are shielded from the gas flow on both sides of the outlet openings - row of holes or slot - attached. These heaters lead heat on the one hand in the area of the outlet opening to the spinning mass from the outside and give it to her where they have a higher speed and therefore higher heat transfer allowed, an increase in temperature, on the other hand, the heaters are of the type that they radiate heat at the conical or wedge-shaped Transfer part of the deforming spinning mass.
- Fig. 1 is a section through the lower part of a Spinneret 1 and an associated Laval nozzle shown this cut being both for a rotatin-symmetrical Spinneret which is a thread or a Spins monofilament, and a rotationally symmetrical Laval nozzle, as well as for a slit or rectangular shape Spinneret that spins a film, and so on rectangular Laval nozzle applies. It can also a spinneret with several in a row Spinning bores with corresponding elongated Laval nozzle may be provided.
- the spinneret 1 there is a plate 11, 11 'with a gap 12 ', seen from the spinneret converging and then is slightly divergent and is at the bottom Edge of the plate 11, 11 'greatly expanded, whereby the Laval nozzle is formed.
- the spinneret or the spinning holes of the spinnerets end just above the Laval nozzle or in the upper level of the plate 11, 11 ', if necessary, the spinneret 1 can also easily protrude into the opening 12.
- the spinneret 1 is surrounded by an insulating arrangement 8, 8 ', to shield the on spinning temperature heated spinneret serves against heat loss, whereby also advantageously an air gap 9 between the spinneret 1 and insulating arrangement 8, 8 'is provided.
- the spinneret 1 has an outlet opening 4, in the Area a heater 10, 10 'is attached, which in the Embodiment is designed as a flat heating tape and which advantageously against the insulating arrangement 8, 8 'to avoid heat loss is isolated by parts 13 and 13 '.
- the room below the plate 11, 11 ' usually has ambient pressure, i.e. Atmospheric pressure while the Gas in the space between spinneret 1 and plate 11, 11 ' is under increased pressure.
- ambient pressure i.e. Atmospheric pressure
- the Gas in the space between spinneret 1 and plate 11, 11 ' is under increased pressure.
- Plate 11, 11 'a little against ambient pressure have increased pressure, for example by a few millibars, the one for further processing, such as fleece laying or other thread collecting devices is needed.
- a polymer solution 2 flows against the outflow opening 4 of the nozzle 1 along the arrow 3 shown.
- a thread 5 or a film is formed, which in its further course due to the gas flow coming laterally from above along the arrows 6, 6 ′ drawn in between the contour of the surfaces of the plate 11, 11 ′ and the outer surfaces 7, 7 'of the insulating arrangement 8, 8' runs, reduced in diameter or in width.
- the heater 10, 10 heats the capillary of the outlet opening 4 from the outside and can heat up the spinning mass flowing past it with its lower part by appropriate extension, essentially by radiation.
- the thread 5 or the film passes into the constriction 12 'of the flow cross section for the gas flow 6, 6' formed by the parts 11, 11 'of the plate, in the manner of the Laval nozzle with the narrowest cross section at 12.
- the critical pressure ratio for example in the idle state of the gas p 1 in the chamber above the plate 11, 11 'to the pressure in the narrowest point p e .
- supersonic speeds can also arise in the case of supercritical pressure conditions.
- the Laval nozzle widens very much immediately after the narrowest cross-section 12 or shortly thereafter in order to prevent the threads from sticking to the plate 11, 11 'just below the Laval nozzle due to the fanning out that begins in this area.
- the thread 5 or bursts splits when the thread cladding the solution thread against the internal pressure that has grown with the thread constriction can no longer hold together.
- the monofilament then divides into individual threads, which are due to the temperature difference between solution and cold gas or air and suddenly suddenly strongly growing surface of the individual threads, based on the Thread mass, cool quickly. It is therefore a certain one Number of very fine, essentially endless Individual threads emerged. With a Lyocell solution the phenomenon of fanning often does not occur or only here and there, i.e. in Fig. 1 would continue spinning thread.
- the thread is through the laminar gas flow of ever increasing speed warped so that it ultimately becomes too fine Threads due to the cellulose content being around or below 10% comes.
- the solution film also tears just below the Laval nozzle on, the pressure ratios in the film before the Fanning different across the width and the film becomes unstable. Just before fanning out there are furrows and marks the film width and then to break through threads small but larger diameters.
- Fig. 2 shows the perspective view of a system for the method according to the invention, in which a Lyocell mass 130 is supplied to a device 30 and a fleece 20 is obtained therefrom.
- the device 30 for making essentially endless Threads corresponds to the arrangement of FIG. 1, wherein several spinnerets or spinning holes accordingly Fig. 1 are arranged in series and the Laval nozzle is elongated or formed in a rectangular shape. Thread monofilaments emerge from the individual spinning bores from, rejuvenate by the thrust of the Gas flow and splicing if necessary, at Lyocell however less, not in the lower part of the gap illustrated Laval nozzle or something below it to several Threads on. At Lyocell, essentially Single threads spun out.
- Such suction can laterally to the thread sheet are used in a special way when the threads not to a fleece, but to a continuous yarn to be processed, what is wound on rolls or staple fibers to be cut, each after solvent and cellulose pulp Coagulation have been separated.
- the coagulation of the dissolved thread polymer, here cellulose for lyocell threads, in a solvent, here NMMO, can already between spinning device 30 and Storage area 51 is initiated by water mist or steam is blown in laterally against the thread sheet be there, for example, where the previously described Suction boxes for air 110, 110 'are attached and thus exactly in the opposite way to the discharged air now moist air or steam is introduced into the thread sheet become.
- the exterior is already enriched in the cellulose part before it is planted are and not a bond with each other is as strong as if it became one without the like Fleece can be deposited.
- the fleece is then in one Precipitation bath introduced, but then only by press rolls or between a drum, too heated, and the screen belt to self-binding comes. Because the Lyocell threads are soft and already stick to each other if you put them under little Pressure connects. This autogenic Connection is another particular benefit at the production of nonwovens from lyocell threads. Is the Coagulation has already begun, so is the bond not so strong and you get softer fleeces textile grip compared to the previously not sprayed, only fleece drawn through the precipitation bath, the more compact are and have a harder, paper grip.
- a solution was made using a screw press (extruder) of 13% cellulose in an aqueous NMMO solution of 75% and 12% water of a spinning device from a Spinneret with a hole and a round Laval nozzle fed, the single spinning bore a Had a diameter of 0.5 mm.
- the solution is made and directly over it conveying pumps metered to the spinning device.
- the temperature of the Lyocell spinning mass at the extruder outlet was 94 ° C.
- the tip of the nozzle was an electrical resistance heater attached to their heating with a Power between 50 and 300 W.
- the thread pull happened through air at room temperature of about 22 ° C, the pressure measured before acceleration in the Laval nozzle, was between 0.05 and 3 bar above atmospheric pressure set.
- the leakage of the lyocell mass only a little was varied from the tip of the nozzle and lay 1 to 2 mm above the plane where the Laval nozzle constricts, with further settings exactly in this plane or 1 to 2 mm below, so further downstream.
- the Laval nozzle was wide in the narrowest cross section of 4 mm and a total length, measured from the plane where their necking begins, until the strong expansion shortly after the narrowest Cross section, of 10 mm.
- Table 1 shows the settings 1 - 11. You can see the special influence of the heater 10 of the nozzle tip, causing the spinning mass just before it emerges received an elevated temperature from the spinning bore, and clearly above their original temperature from 94 ° C. The threads were only partially spliced, for individual settings, in particular with lower air pressure and lower temperature essentially not. You can convince yourself of this by the thread speed is calculated from the measured throughput of the spinning mass and the mean End thread diameter, corrected for the reduction in diameter through the solvent removal with the highest occurring air speed, i.e. that in the Laval nozzle gap (if no supersonic speed occurs afterwards). Is this higher, the threads can be spliced - the more the speeds differ.
- Example 1 In a device such as that in Example 1, a Solution of 8% cellulose in 78% NMMO and the rest 14% water from diameter spinning holes spun of 0.6 mm. The temperature of the solution at the extruder outlet was 115 ° C and in the distribution room the solution to a total of twenty spinning holes 114 ° C. The heating power of the heating system on both sides of the Nozzle tip was 450 W. The throughput per spin bore was 3.6 g / min.
- the speed of the air in the narrowest cross section of the Laval nozzle u Le and the speed u F50 that a Lyocell thread would have before entering the precipitation bath with a later average diameter d 50 are also listed . If this is larger than u Le , there may be a fanning out. To do this, the values would have to differ very significantly, since a finer diameter than the arithmetically corresponds to the maximum air speed during the spinning process, i.e. in the narrowest gap of the Laval nozzle, may also have resulted from the side peeling off of the main stream or poor cellulose concentration at this point.
- the thread diameter can be further reduced by increasing the temperature of the solution before it emerges from the spinning bore, however the temperature is limited here because the solution decomposes, so that the shortest possible residence times under elevated temperature are chosen by appropriately designing the melting spaces in the lower part of the spinneret become.
- a temperature there of 123 ° C instead of the previous 114 ° C the proportion of individual threads with u F> u Le increased in one setting, roughly like No. 7 in Table 2.
- the spinning mass By setting certain values for the throughput the spinning mass, its temperature and the air speed in the flat gap in longitudinal nozzles or in An annular gap in the case of round nozzles can be used, as in Examples 1 and 2 show the diameter of the substantially control endless threads.
- the throughput per spin hole is higher than in all cases mentioned known meltblown process for Lyocell. The reason is the high shear stresses caused by the strongly accelerated flow, namely a start-up flow, with very thin boundary layers on the thread.
- a spinning device similar to that shown in Fig. 1, was a polypropylene melt with a Temperature of 355 ° C from a slot of 0.9 mm Width and 20 mm length from a bottom ending as a web Spinning nozzle spun out as a film.
- As a stretching gas air was used for the film.
- the thick ones Knots in the fleece not measured.
- the generated fleece is shown in Fig.
- the present description of the invention can also be applied to others solvent-spun thread polymers applied be, for example, on conventional viscose or Rayon threads and their further processing Fleeces or yarns.
- the spinning security is to be emphasized further, that the device is simple, the energy consumption much lower compared to meltblown processes is and surprisingly large diameter for spinning bores and slots can be applied through the high warping caused by the thrust at speeds up to speeds of sound and also above it by means of its production in a Laval nozzle. So there are impurities in the spinning mass no longer so critical with regard to thread breaks.
- lyocell threads With lyocell threads, higher proportions of hemicellulose processed into threads, and also the degree of polymerization the cellulose (DP) can be lower which generally makes the raw materials cheaper, because there are no high tensile forces on the lyocell threads in its original state as fine threads the release mass can be exercised. That basically only cold air or air with waste heat from the air atomization is used at Lyocell, especially but with solution polymers to be spun at a higher temperature much to the energy saving of the process at.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Artificial Filaments (AREA)
Description
- Fig. 1
- eine schematische Schnittdarstellung eines Teils einer Vorrichtung zur Herstellung von Fäden nach der Erfindung,
- Fig. 2
- eine perspektivische Ansicht einer erfindungsgemäßen Vorrichtung nach einem Ausführungsbeispiel mit Zeilendüse und Spinnbohrungen zur Herstellung von Lyocell-Vliesen aus Mikrofäden,
- Fig. 3
- ein Foto einer mikroskopischen Aufnahme von PP-Spleißfäden, hergestellt nach Beispiel 3 durch Aufplatzen eines Schmelzefilms, und
- Fig. 4
- ein Foto von PP-Spleißfäden unter Bedingungen entsprechend Fig. 3, hergestellt durch Aufspleißen von Monofilen.
Nr. | Mo g/min | p1 mbar | Ph W | d50 µm | CV % |
1 | 3,4 | 80 | 79 | 26,2 | 26 |
2 | 3,4 | 150 | 97 | 24,9 | 20 |
3 | 3,4 | 150 | 116 | 19,0 | 24 |
4 | 3,4 | 150 | 130 | 13,2 | 29 |
5 | 3,4 | 200 | 130 | 12,0 | 17 |
6 | 3,4 | 100 | 130 | 10,1 | 64 |
7 | 11,1 | 400 | 370 | 24,4 | 47 |
8 | 6,65 | 1000 | 370 | 13,4 | 38 |
9 | 3,68 | 1500 | 276 | 11,1 | 36 |
10 | 2,33 | 1500 | 280 | 8,3 | 33 |
11 | 4,57 | 3000 | 208 | 9,1 | 54 |
Nr. | P1 mbar | d50 µm | dmin µm | dmax µm | CV % | uLe m/s | uF50 m/s |
5 | 160 | 8,5 | 2,8 | 21,1 | 59 | 156 | 67 |
7 | 200 | 8,0 | 3,7 | 14,7 | 39 | 173 | 78 |
9 | 250 | 9,7 | 2,7 | 16,3 | 39 | 192 | 52 |
11 | 300 | 9,2 | 5,1 | 18,4 | 43 | 209 | 61 |
Claims (19)
- Verfahren zur Herstellung von im Wesentlichen endlosen feinen Fäden aus einer Spinnmasse aus gelösten Polymeren synthetischen oder natürlichen Ursprungs, bei dem die Spinnmasse aus mindestens einer Spinnbohrung ausgesponnen wird und der ausgesponnene Faden durch mittels einer Lavaldüse auf hohe Geschwindigkeit stetig beschleunigte Gasströme verzogen wird, wobei die Gasströmung im Bereich der Fadenbildung im Wesentlichen laminar ist.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Maximum der Geschwindigkeit der Gasströmung unterhalb des Austritts der Spinnmasse aus der Spinnbohrung ist.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die den Faden verziehenden Gasströme Umgebungstemperatur oder eine aus ihrer Erzeugung und Zufuhr bedingte Temperatur aufweisen.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Spinnmasse im Lösungsmittel, wie Aminoxid, gelöste Cellulose ist.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass bei gegebener Geometrie der Spinnbohrung und ihrer Lage zur Lavaldüse die Temperatur der Spinnmasse oder des aus der Spinnbohrung austretenden Fadens und/oder die Drücke vor und hinter der Lavaldüse so gesteuert werden, dass der Faden vor seinem Erstarren einen hydrostatischen Druck in seinem Inneren erreicht, der größer ist, als der ihn umgebende Gasdruck, derart, dass der Faden platzt und sich in eine Vielzahl feiner Fäden aufspleißt.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Raum hinter der Lavaldüse Umgebungsdruck aufweist oder bei Weiterverarbeitung der Fäden auf einem für die Weiterverarbeitung notwendigen Druck etwas über Umgebungsdruck liegt.
- Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Verhältnis der Drücke in dem Raum über und unter der Lavaldüse bei der Verwendung von Luft abhängig von dem Polymer, dessen Durchsatz und Temperatur zwischen 1,02 und 3 gewählt wird.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Spinnmasse im Bereich der Austrittsstelle und/oder der aus der Spinnbohrung austretende Faden beheizt wird.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass eine Vielzahl von Fäden ausgesponnen und gegebenenfalls aufgespleißt werden, die zu einem Vlies abgelegt oder zu Garnen weiterverarbeitet werden.
- Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Fäden ausgesponnen werden, von der begleitenden Gasströmung getrennt werden, zur Koagulation der Cellulose einer Fälleinrichtung zugeführt und auf Spulen aufgespult werden.
- Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass aus einer Celluloselösung ausgesponnene Fäden im Trocknen abgelegt und anschließend durch ein Fällbad geführt werden.
- Verfahren nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass in den Verzugbereich der Fäden Wasser oder Wasserdampf zur Steuerung der Bindung der Fäden miteinander in einem Vlies eingeblasen wird.
- Verfahren zur Herstellung von feinen Fäden aus einer Spinnmasse aus löslichen Polymeren synthetischen oder natürlichen Ursprungs, bei dem die Spinnmasse in Form eines Films aus einer lang gestreckten schlitzartigen Spinndüse ausgesponnen wird und der ausgesponnene Film durch mittels einer lang gestreckten Lavaldüse auf hohe Geschwindigkeit beschleunigte Gasströme verzogen wird, wobei der Film am Austritt aus der Lavaldüse oder kurz danach in eine Vielzahl von Fäden aufbricht, die zu einem Vlies abgelegt werden.
- Vorrichtung zur Herstellung von im Wesentlichen endlosen feinen Fäden aus lösungsspinnbaren Polymeren natürlichen oder synthetischen Ursprungs mit einem mit einer Zuführvorrichtung für die Spinnmasse verbundenen Spinnkopf, einer in dem Spinnkopf aufgenommenen Spinndüsenanordnung, die mindestens eine Spinnbohrung aufweist, die einen Lösungsfaden ausspinnt, einer unterhalb des Spinnkopfes in fester geometrischer Zuordnung zu der Spinndüse angeordnete runde Lavaldüse, wobei sich der engste Querschnitt der Lavaldüse unterhalb des Spinnmassenaustritts befindet.
- Vorrichtung zur Herstellung von feinen Fäden aus lösungsspinnbaren Polymeren natürlichen oder synthetischen Ursprungs mit einem mit einer Zuführvorrichtung für die Spinnmasse verbundenen Spinnkopf, einer in dem Spinnkopf aufgenommenen Spinndüsenanordnung, die mindestens eine lang gestreckte schlitzartige Spinndüse aufweist, die einen Lösungsfilm ausspinnt, einer unterhalb des Spinnkopfes in fester geometrischer Zuordnung zu der Spinndüse angeordnete lang gestreckte Lavaldüse, wobei sich der engste Querschnitt der Lavaldüse unterhalb des Spinnmassenaustritts befindet.
- Vorrichtung nach Anspruch 14 oder 15, dadurch gekennzeichnet, dass die Spinnanordnung im Bereich der mindestens einen Spinnbohrung bzw. des mindestens einen Spinnschlitzes durch eine Isolieranordnung isoliert ist und/oder beheizt ist.
- Vorrichtung nach einem der Ansprüche 14 bis 16, dadurch gekennzeichnet, dass der Abstand zwischen Spinnmassenaustritt und engstem Querschnitt der Lavaldüse ≥ 5 mm ist.
- Vorrichtung nach einem der Ansprüche 14 bis 17, dadurch gekennzeichnet, dass ein Ablegeband zur Ablage der Fäden und Bildung eines Vlieses vorgesehen ist.
- Vorrichtung nach Anspruch 18, dadurch gekennzeichnet, dass das Ablegeband zumindest teilweise in ein Fällbad zur Koagulation der Faserstoffe aus der Lösung hineinragt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10065859A DE10065859B4 (de) | 2000-12-22 | 2000-12-22 | Verfahren und Vorrichtung zur Herstellung von im Wesentlichen endlosen feinen Fäden |
DE10065859 | 2000-12-22 | ||
PCT/EP2001/015136 WO2002052070A2 (de) | 2000-12-22 | 2001-12-21 | Verfahren und vorrichtung zur herstellung von im wesentlichen endlosen feinen fäden |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1358369A2 EP1358369A2 (de) | 2003-11-05 |
EP1358369B1 true EP1358369B1 (de) | 2004-08-18 |
Family
ID=7669514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01985429A Expired - Lifetime EP1358369B1 (de) | 2000-12-22 | 2001-12-21 | Verfahren und vorrichtung zur herstellung von im wesentlichen endlosen feinen fäden |
Country Status (10)
Country | Link |
---|---|
US (1) | US7922943B2 (de) |
EP (1) | EP1358369B1 (de) |
CN (1) | CN1322181C (de) |
AT (1) | ATE274075T1 (de) |
AU (1) | AU2002234596A1 (de) |
CA (1) | CA2432790C (de) |
DE (2) | DE10065859B4 (de) |
ES (1) | ES2227307T3 (de) |
RU (1) | RU2265089C2 (de) |
WO (1) | WO2002052070A2 (de) |
Cited By (5)
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FR2735794B1 (fr) * | 1995-06-26 | 1997-09-19 | Elysees Balzac Financiere | Procede de preparation d'un melange de fibres et de microfibres cellulosiques |
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GB9625634D0 (en) * | 1996-12-10 | 1997-01-29 | Courtaulds Fibres Holdings Ltd | Method of manufacture of nonwoven fabric |
DE19744942C1 (de) * | 1997-10-10 | 1999-07-01 | Hoechst Ag | Emissionsarme Modifizierungsmittel für Melamin-Tränkharze |
GB2337957A (en) * | 1998-06-05 | 1999-12-08 | Courtaulds Fibres | Method of manufacture of a nonwoven fabric |
DE19929709C2 (de) * | 1999-06-24 | 2001-07-12 | Lueder Gerking | Verfahren zur Herstellung von im Wesentlichen endlosen feinen Fäden und Verwendung der Vorrichtung zur Durchführung des Verfahrens |
-
2000
- 2000-12-22 DE DE10065859A patent/DE10065859B4/de not_active Expired - Lifetime
-
2001
- 2001-12-21 RU RU2003118457/12A patent/RU2265089C2/ru active
- 2001-12-21 AT AT01985429T patent/ATE274075T1/de active
- 2001-12-21 EP EP01985429A patent/EP1358369B1/de not_active Expired - Lifetime
- 2001-12-21 AU AU2002234596A patent/AU2002234596A1/en not_active Abandoned
- 2001-12-21 ES ES01985429T patent/ES2227307T3/es not_active Expired - Lifetime
- 2001-12-21 CA CA2432790A patent/CA2432790C/en not_active Expired - Lifetime
- 2001-12-21 WO PCT/EP2001/015136 patent/WO2002052070A2/de not_active Application Discontinuation
- 2001-12-21 CN CNB018228224A patent/CN1322181C/zh not_active Expired - Lifetime
- 2001-12-21 DE DE50103362T patent/DE50103362D1/de not_active Expired - Lifetime
- 2001-12-21 US US10/451,327 patent/US7922943B2/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8282877B2 (en) | 2006-04-28 | 2012-10-09 | Lenzing Aktiengesellschaft | Process of making a hydroentangled product from cellulose fibers |
US9334592B2 (en) | 2007-11-07 | 2016-05-10 | Lenzing Aktiengesellschaft | Process for the production of a hydroentangled product comprising cellulose fibers |
EP2824224A1 (de) | 2013-07-08 | 2015-01-14 | Gerking, Lüder | Spinnvliese und Fäden aus ligninhaltigen faserbildenden Polymeren |
US11371173B2 (en) | 2016-10-21 | 2022-06-28 | Lenzing Ag | Process and device for the formation of directly-formed cellulosic webs |
US11326283B2 (en) | 2017-04-03 | 2022-05-10 | Lenzing Aktiengesellschaft | Nonwoven cellulose fiber fabric with homogeneously merged fibers |
Also Published As
Publication number | Publication date |
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CN1322181C (zh) | 2007-06-20 |
US20040099981A1 (en) | 2004-05-27 |
CA2432790A1 (en) | 2002-07-04 |
CN1492952A (zh) | 2004-04-28 |
ATE274075T1 (de) | 2004-09-15 |
DE10065859A1 (de) | 2002-07-11 |
CA2432790C (en) | 2011-05-10 |
WO2002052070A2 (de) | 2002-07-04 |
US7922943B2 (en) | 2011-04-12 |
EP1358369A2 (de) | 2003-11-05 |
WO2002052070A3 (de) | 2002-11-07 |
DE50103362D1 (de) | 2004-09-23 |
RU2265089C2 (ru) | 2005-11-27 |
DE10065859B4 (de) | 2006-08-24 |
ES2227307T3 (es) | 2005-04-01 |
AU2002234596A1 (en) | 2002-07-08 |
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