EP1777326A1 - Roving Bobbin - Google Patents
Roving Bobbin Download PDFInfo
- Publication number
- EP1777326A1 EP1777326A1 EP05015833A EP05015833A EP1777326A1 EP 1777326 A1 EP1777326 A1 EP 1777326A1 EP 05015833 A EP05015833 A EP 05015833A EP 05015833 A EP05015833 A EP 05015833A EP 1777326 A1 EP1777326 A1 EP 1777326A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roving
- yarn
- bobbin
- staple fiber
- fibers
- 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.)
- Withdrawn
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- 239000000835 fiber Substances 0.000 claims abstract description 60
- 239000012209 synthetic fiber Substances 0.000 claims abstract description 9
- 229920002994 synthetic fiber Polymers 0.000 claims abstract description 9
- 239000004952 Polyamide Substances 0.000 abstract 1
- 229920002647 polyamide Polymers 0.000 abstract 1
- 229920000728 polyester Polymers 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 34
- 238000000034 method Methods 0.000 description 19
- 239000011265 semifinished product Substances 0.000 description 14
- 238000004804 winding Methods 0.000 description 10
- 238000001816 cooling Methods 0.000 description 9
- 238000007378 ring spinning Methods 0.000 description 6
- 230000006641 stabilisation Effects 0.000 description 6
- 238000011105 stabilization Methods 0.000 description 6
- 238000007730 finishing process Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 235000013351 cheese Nutrition 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
- D01G1/06—Converting tows to slivers or yarns, e.g. in direct spinning
- D01G1/08—Converting tows to slivers or yarns, e.g. in direct spinning by stretching or abrading
Definitions
- the invention relates to a roving bobbin with a roving, in particular for a ring spinning machine or a twisting machine.
- the roving is made from at least one fully drawn semifinished product which is in multifilament form, wherein the semifinished product is fed to at least one stretch breaking zone, and a tear conversion of the semi-finished product in the stretch breaking zone into a staple fiber strip is carried out.
- the invention is in the field of making staple yarn from filament yarns, which may be pure staple synthetic yarn or mixed yarn of synthetic and natural fibers.
- the filament yarns used for this purpose are semi-finished products that are not yet suitable for the production of textiles, since a fabric made from them would not have the desired properties.
- the development in staple fiber spinning is characterized by the idea that both natural fibers such as cotton and wool as well as synthetic fibers can be processed with the same technology. This idea forms the basis for the production of blended yarns in addition to the staple yarns of 100 percent synthetic or natural fibers.
- the synthetic fibers used for this purpose can be adapted as closely as possible to the naturally prescribed properties of the natural fibers with regard to distribution of the fiber length, force / elongation ratio, fineness and crimp.
- the factors mentioned also determine important production parameters and yarn properties, such as irregularity of the yarn, number of fibers in the yarn cross section and yarn count.
- the synthetic fibers of the filament yarns can be torn in a stretch-breaking machine, wherein the stretch-breaking machine with LOY (Low Oriented Yarn), ie low-oriented filament yarns, POY (Partially Oriented Yarn), ie partially oriented filament yarns or FOY (Fully Oriented Yarn), so completely oriented Filament yarns, can be fed and the result of the breaking strain by a roving (roving) is formed.
- This roving is a staple fiber ribbon, which is processed directly.
- the roving is spun, for example, in a ring spinning process and solidified into a yarn.
- the starting material for feeding the stretch breaking machine is a semi-finished product consisting of a plurality of filaments.
- the EP 1 522 614 A1 discloses a machine in which a number of at least one, usually up to eight, filament yarns are withdrawn from supply spools in a gate.
- the tension of the filament yarns can be monitored and controlled to a constant value if the quality of the supply bobbins is very poor or the supply bobbins are different (for example, with regard to feed bobbin end titer, number of filaments, color of the supply bobbins). Voltage regulation is optional and depends on the feed bobbins.
- the filament yarns are combined to form a filament yarn F, and this passes into a draw zone SZ formed by two conveyor rollers, which is required for orientation of the fibers.
- the final product ie the staple yarn
- partial stretching of the filament yarn is required
- the end product is to have complete orientation of the fibers
- complete stretching of the filament yarn F is required.
- an end product with a low orientation of the fibers does not require stretching.
- the first roller initiates the stretching process and optimizes the stretching forces
- the second roller causes the stretching process via its higher peripheral speed compared to the first roller.
- the rollers can be heated, whereby a fixation of the filament yarn F is achieved, which is an essential requirement for high-speed spinning.
- the filament yarn F enters a cooling zone with an optional cooling device, in which it is cooled from the temperature of the heated rolls to ambient temperature.
- the cooling device is very important when producing at very high speed, at low speed the filament yarn F can be cooled in the cooling zone without a cooling device. This means that the use of the cooling device depends on the production speed and the temperature of the rolls.
- the filament yarn F passes through at least two spaced rollers, each consisting of a conveying roller and one or two pressure rollers.
- the rolls form, for example, three stretch breaking zones SB1 to SB3.
- the foremost one in the yarn running direction is driven at a higher speed than the downstream ones, whereby a tensile force is applied to the filament yarn in each stretch breaking zone SB1 to SB3.
- the length of the first stretch breaking zone SB1 is greater than the length of the second break breaking zone SB2 and its length is greater than that of the third drawing breaking zone SB3.
- the optional second and third stretch breaking zones SB2 and SB3 serve to further partially refract the now fibers and to reduce the variation in fiber length and number of fibers in the yarn cross section.
- the said stretch breaking process is described in detail.
- the second or third stretch break (stretch breaking zone SB2 or SB3) is often referred to as "rebreaking".
- the filaments of the filament yarn F are converted into a staple fiber tape consisting of relatively loose fibers, which is consolidated (consolidated) following the break-rupture into a holding staple yarn.
- This solidification which takes place for example through a nozzle, we obtain a staple G with the desired optical and physical properties and the desired handle.
- the solidification stress required for the consolidation of the sliver to the staple yarn G is generated by a draw roll.
- a finished yarn is always produced with the aforementioned yarn production machines or yarn production methods.
- the yarn always has a tensile strength of at least 20 centinewtons per tex.
- a disadvantage of the known yarn-forming machines with stretch breaking zones is that the integration of various yarn finishing processes, such as ring spinning or twisting, results in an uneconomic yarn production process, since such yarn finishing processes have significantly lower production speeds than the stack yarn production itself.
- the roving used for this purpose must have the lowest possible strength, since it still has to be warped in these processes, ie the individual fibers of the roving must be able to easily slip past each other under tension.
- the solidified staple yarn is no longer suitable as a template yarn, ie, as a starting product for these processes, since such a consolidated yarn is no longer sufficiently stretchable. If one integrated the yarn finishing processes within one of the described yarn manufacturing machines, then the entire manufacturing process would have to proceed at the lower production speed, whereby the staple yarn production machine would not be utilized economically.
- the invention has for its object to provide a roving bobbin with a roving, which avoids the disadvantages of the prior art and in particular can be produced while maintaining a high production rate of a staple yarn and as a supply spool for the production of finished yarns with lower production speeds, such as. Twisted yarn, suitable as staple yarn.
- roving bobbin with a roving of synthetic fibers for further processing into a yarn the roving is wound as a staple fiber ribbon on the roving, the fibers of the staple fiber ribbon are arranged substantially parallel to each other in almost no rotation against each other ,
- the term "virtually torsion-free” is understood to mean that twisting of the fibers of the stacking belt, if present, corresponds to a twisting of the fibers of the semi-finished products used as starting material in the described production method, i. no significant additional twists is present. In particular, a possibly present minimum twist has no significant influence on the strength of the roving for the stretchability of the roving.
- this is a cross-wound bobbin. Characterized in that the roving is wound on a spool, it can serve as a supply spool without affecting in particular the production speed of the roving for slower follow-up processes on the spool. There is thus a particularly economical production of stacking yarns with a true twist, e.g. by means of a ring spinning machine or a twisting machine allows.
- the individual fibers of the staple fiber band preferably have a fineness of 0.3 to 5 decitex.
- the roving has a fineness of less than 150 tex, the roving can be particularly well wound up on a cross-wound bobbin.
- the roving bobbin according to the invention is preferably produced by the method described below for producing a roving on a roving bobbin.
- the feed bobbin according to the invention is particularly suitable as a supply bobbin for a ring spinning machine or a twisting machine.
- the method from at least one fully stretched semi-finished product (Fully Drawn Yarn FDY), which is in multifilament form, after feeding the semifinished product into at least one stretch breaking zone, and a break conversion of the semi-finished product in the stretch breaking zone into a staple fiber ribbon, which creates the roving bobbin by winding the roving staple ribbon onto the roving bobbin.
- the invention is based on the finding that, although the staple fiber tape is not solidified, and thus the individual fibers can easily slip past each other under tension, it is possible to wind the non-solidified staple ribbon on a spool.
- the roving thus produced can be produced at a high production speed and kept in a subsequent process on another machine as a template material for a slower running yarn finishing process.
- the economical operation of the stretch breaking process is possible even if e.g. a ring spinning machine or a twisting machine to be equipped with the thus created roving.
- the fibers are in a substantially parallel orientation so that the roving is still stretchable.
- the coiled roving or staple fiber band is not, in particular by a nozzle applying a torque to the staple fiber band, e.g. an air-texturing nozzle solidified under a solidification stress, i. consolidated into a staple yarn.
- the roving bobbin produced according to the invention is a wound roving with a low strength and essentially without a twisting of the fibers of the stacking band against each other.
- the staple fiber band preferably passes through a conveying device before being wound up.
- a cross-wound bobbin is created as a roving bobbin.
- a cheese is less susceptible to damage than a coil on which the roving is wound only in parallel windings. As a result, such a coil is transport stable.
- a cross-wound bobbin can also be used with a thread reserve as a supply spool. In such an application, a quasi-endless manufacturing process with such a supply bobbin is possible if the thread reserve is connected to a connecting coil.
- the staple fiber ribbon is temporarily stabilized before being wound up.
- temporary it is meant that the stabilization is no longer present in the roving wound on the roving bobbin, i. E. either dissolved itself without further measures or was actively dissolved again. This makes it possible to achieve higher production speeds, since the temporary stabilization of the staple fiber band in areas of its yarn path where a special mechanical stress occurs, e.g. on thread guides or the described conveying device is less stretched and thus lower quality impairments or production interruptions occur by thread breaks.
- the temporary stabilization can be advantageously carried out by applying a torque to the staple fiber ribbon through a nozzle, wherein a twisting of the fibers of the staple fiber ribbon by the torque is dissolved before winding again.
- a torque to the staple fiber ribbon through a nozzle
- the twist of the fibers will automatically resolve again, since a fixation of the rotation, e.g. by a following in a heating zone cooling zone in the threadline, is omitted.
- the semi-finished product is made of a partially or slightly oriented yarn, wherein the oriented yarn is fed to a draw zone and in the Stretching zone is stretched to the semi-finished product.
- the completely drawn yarn which is required as the starting product of the process described for producing the roving bobbin according to the invention can be provided. It is then not a FDY used as a template but a POY, for example.
- the POY is stretched in-line, ie as a partial process step of the process, in a draw zone, in an upstream stage on the roving production machine with which said method is carried out, to form a FDY, ie the completely drawn semifinished product.
- the semifinished product preferably passes through a cooling zone between the draw zone and the stretch break zone. This allows a very high production speed.
- a roving production machine which is set up to carry out the described method, has at least one machine position designed as a stretch breaking zone, wherein the stretch breaking zone is formed by individually drivable rolls.
- a winding unit is provided on the roving production machine, designed to create a roving bobbin, preferably a cross-wound bobbin, by winding up a roving present as a staple fiber band after the stretch breaking zone.
- this roving production machine can be provided in an advantageous manner in particular provided for tear conversion machine parts, as described in the prior art.
- stretch breaking zones can advantageously be arranged one behind the other and / or it can be provided that the roving production machine is set up for the simultaneous feeding of a plurality of filament yarns as semi-finished products into the stretch breaking zones.
- the roving production machine With the roving production machine, a roving bobbin with a as Staple fiber ribbon present roving are produced, whereby the advantages described can be achieved.
- a conveying device is provided between the stretch breaking zone and the winding unit, designed to convey the staple fiber strip with a preferably controlled thread tension to the winding unit. This makes it possible to produce a more even roving quality.
- a stabilization device is particularly preferably provided between the stretch breaking zone and the winding unit in order to temporarily stabilize the staple fiber tape. Faulty production stoppages, e.g. By thread breaks on thread guides or the conveyor, are minimized.
- the stabilizing device may advantageously have a nozzle, configured to carry out the temporary stabilization by applying a torque to the staple fiber ribbon, wherein a twisting of the fibers of the staple fiber ribbon by the torque dissolves before winding again.
- the temporary stabilization can be achieved in a proven manner. The twist dissolves in the further threadline by itself again, since no fixation of the rotation is made.
- a roving bobbin, in particular a cheese, with a roving made of synthetic fibers for further processing into a yarn is proposed.
- the roving is wound as a staple fiber ribbon on the roving bobbin, wherein the fibers of the staple fiber band are arranged substantially parallel to each other in almost no rotation against each other.
- the invention is not limited to the embodiments given above. Rather, a number of variants are conceivable, which make use of the features of the invention even with fundamentally different type of execution.
- the different illustrated features of the invention can be combined with the features of the cited prior art, provided that no final consolidation of the Vorgans before being wound onto the roving bobbin.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorgarnspule mit einem Vorgarn, insbesondere für eine Ringspinnmaschine oder eine Zwirnmaschine. Das Vorgarn wird aus mindestens einem vollständig verstreckten Halbfabrikat, das in Multifilamentform vorliegt, hergestellt, wobei das Halbfabrikat mindestens einer Streckbrechzone zugeführt wird, und eine Reißkonvertierung des Halbfabrikats in der Streckbrechzone in ein Stapelfaserband vorgenommen wird.The invention relates to a roving bobbin with a roving, in particular for a ring spinning machine or a twisting machine. The roving is made from at least one fully drawn semifinished product which is in multifilament form, wherein the semifinished product is fed to at least one stretch breaking zone, and a tear conversion of the semi-finished product in the stretch breaking zone into a staple fiber strip is carried out.
Die Erfindung liegt auf dem Gebiet der Herstellung von Stapelgarn aus Filamentgarnen, wobei es sich um reines Kunstfaser-Stapelgarn oder um ein Mischgarn aus Kunst- und Naturfasern handeln kann. Bei den dazu verwendeten Filamentgarnen handelt es sich um Halbfabrikate, die sich noch nicht zur Herstellung von Textilien eignen, da ein daraus hergestelltes Gewebe nicht die dazu gewünschten Eigenschaften aufweisen würde. Die Entwicklung in der Stapelfaserspinnerei ist durch die Vorstellung gekennzeichnet, dass sowohl Naturfasern wie Baumwolle und Wolle als auch Kunstfasern mit der gleichen Technologie verarbeitet werden können. Diese Vorstellung bildet die Basis für die Herstellung von Mischgarnen zusätzlich zu den Stapelgarnen aus 100 Prozent Kunst- oder Naturfasern. Für die Herstellung von Mischgarn ist erforderlich, dass die dazu verwendeten Kunstfasern hinsichtlich Verteilung der Faserlänge, Kraft-/Dehnungsverhältnis, Feinheit und Kräuselung möglichst eng an die natürlich vorgegebenen Eigenschaften der Naturfasern angepasst werden können. Die genannten Faktoren bestimmen außerdem wichtige Herstellungsparameter und Garneigenschaften, wie Unregelmäßigkeit des Garns, Anzahl der Fasern im Garnquerschnitt und Garnnummer.
Dazu können die Kunstfasern der Filamentgarne in einer Streckbrechmaschine gerissen werden, wobei die Streckbrechmaschine mit LOY (Low Oriented Yarn), also gering orientierten Filamentgarnen, POY (Partially Oriented Yarn), also partiell orientierten Filamentgarnen oder FOY (Fully Oriented Yarn), also vollständig orientierten Filamentgarnen, gespeist werden kann und das Ergebnis der Streckbrechung durch ein Vorgarn (Roving) gebildet ist. Bei diesem Vorgarn handelt es sich um ein Stapelfaserband, das direkt weiter verarbeitet wird. Das Vorgarn wird z.B. in einem Ringspinnprozess gesponnen und zu einem Garn verfestigt. Das Ausgangsprodukt für die Beschickung der Streckbrechmaschine ist ein Halbfabrikat, das aus einer Vielzahl von Filamenten besteht.The invention is in the field of making staple yarn from filament yarns, which may be pure staple synthetic yarn or mixed yarn of synthetic and natural fibers. The filament yarns used for this purpose are semi-finished products that are not yet suitable for the production of textiles, since a fabric made from them would not have the desired properties. The development in staple fiber spinning is characterized by the idea that both natural fibers such as cotton and wool as well as synthetic fibers can be processed with the same technology. This idea forms the basis for the production of blended yarns in addition to the staple yarns of 100 percent synthetic or natural fibers. For the production of blended yarn it is necessary that the synthetic fibers used for this purpose can be adapted as closely as possible to the naturally prescribed properties of the natural fibers with regard to distribution of the fiber length, force / elongation ratio, fineness and crimp. The factors mentioned also determine important production parameters and yarn properties, such as irregularity of the yarn, number of fibers in the yarn cross section and yarn count.
For this purpose, the synthetic fibers of the filament yarns can be torn in a stretch-breaking machine, wherein the stretch-breaking machine with LOY (Low Oriented Yarn), ie low-oriented filament yarns, POY (Partially Oriented Yarn), ie partially oriented filament yarns or FOY (Fully Oriented Yarn), so completely oriented Filament yarns, can be fed and the result of the breaking strain by a roving (roving) is formed. This roving is a staple fiber ribbon, which is processed directly. The roving is spun, for example, in a ring spinning process and solidified into a yarn. The starting material for feeding the stretch breaking machine is a semi-finished product consisting of a plurality of filaments.
Die
In der ersten Streckbrechzone SB1 werden alle Filamente des Filamentgarns F gerissen und dadurch in Fasern umgewandelt. Durch Änderung des Verhältnisses der Geschwindigkeit der Walzen kann man die Garnnummer auf den gewünschten dtex- Wert (dtex = Decitex, das ist das Gewicht in Gramm pro 10'000 Meter Garn) reduzieren. Die optionale zweite und dritte Streckbrechzone SB2 und SB3 dient zu einer neuerlichen teilweisen Brechung der nunmehrigen Fasern und zur Reduktion der Schwankungsbreite der Faserlänge und der Anzahl Fasern im Garnquerschnitt.The
In the first stretch breaking zone SB1, all the filaments of the filament yarn F are torn and thereby converted into fibers. By changing the ratio of the speed of the rolls, one can reduce the yarn count to the desired dtex value (dtex = decitex, which is the weight in grams per 10'000 meters of yarn). The optional second and third stretch breaking zones SB2 and SB3 serve to further partially refract the now fibers and to reduce the variation in fiber length and number of fibers in the yarn cross section.
In der
Mit den genannten Garnherstellungsmaschinen bzw. Garnherstellungsverfahren wird also immer ein fertiges Garn hergestellt. Dazu wird als Abschluss des Herstellungsprozesses eine dauerhafte Verfestigung des während des Herstellungsprozesses vorhandenen Vorgarns vorgenommen, um das fertige Garn anschließend auf eine Garnspule aufzuwickeln. Das Garn hat dabei immer eine Reißfestigkeit von mindestens 20 Centinewton pro tex.
Nachteilig bei den bekannten Garnherstellungsmaschinen mit Streckbrechzonen ist es, dass die Integration verschiedener Garnveredelungsprozesse, wie zum Beispiel das Ringspinnen oder die Verarbeitung zu Zwirn, zu einem unwirtschaftlichen Garnherstellungsprozess führt, da derartige Garnveredelungsprozesse wesentlich niedrigere Produktionsgeschwindigkeiten als die Stapelgarnherstellung selbst haben. Für derartige Garnveredelungsprozesse muss das dazu verwendete Vorgarn eine möglichst geringe Festigkeit aufweisen, da es bei diesen Prozessen noch verzogen werden muss, d.h. die einzelnen Fasern des Vorgarns müssen unter Zugspannung leicht aneinander vorbeigleiten können. Das verfestigte Stapelgarn eignet sich dazu jedoch nicht mehr als Vorlagegarn d.h. als Ausgangsprodukt für diese Prozesse, da ein derartiges verfestigtes Garn nicht mehr ausreichend verstreckbar ist. Würde man die Garnveredelungsprozesse innerhalb einer der beschriebenen Garnherstellungsmaschinen integrieren, so würde der gesamte Herstellungsprozess mit der niedrigeren Herstellungsgeschwindigkeit ablaufen müssen, wodurch die Stapelgarnherstellungsmaschine nicht wirtschaftlich ausgelastet wäre.Thus, a finished yarn is always produced with the aforementioned yarn production machines or yarn production methods. For this purpose, as a completion of the manufacturing process, a permanent consolidation of during the Making existing process roving made to then wind the finished yarn on a yarn package. The yarn always has a tensile strength of at least 20 centinewtons per tex.
A disadvantage of the known yarn-forming machines with stretch breaking zones is that the integration of various yarn finishing processes, such as ring spinning or twisting, results in an uneconomic yarn production process, since such yarn finishing processes have significantly lower production speeds than the stack yarn production itself. For such Garnveredelungsprozesse the roving used for this purpose must have the lowest possible strength, since it still has to be warped in these processes, ie the individual fibers of the roving must be able to easily slip past each other under tension. However, the solidified staple yarn is no longer suitable as a template yarn, ie, as a starting product for these processes, since such a consolidated yarn is no longer sufficiently stretchable. If one integrated the yarn finishing processes within one of the described yarn manufacturing machines, then the entire manufacturing process would have to proceed at the lower production speed, whereby the staple yarn production machine would not be utilized economically.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorgarnspule mit einem Vorgarn bereitzustellen, welche die Nachteile des Standes der Technik vermeidet und die insbesondere unter Beibehaltung einer hohen Herstellungsgeschwindigkeit eines Stapelgarns herstellbar ist und sich als Vorlagespule für die Herstellung von veredelten Garnen mit niedrigeren Produktionsgeschwindigkeiten, wie z.B. Zwirn, als Stapelgarn eignet.The invention has for its object to provide a roving bobbin with a roving, which avoids the disadvantages of the prior art and in particular can be produced while maintaining a high production rate of a staple yarn and as a supply spool for the production of finished yarns with lower production speeds, such as. Twisted yarn, suitable as staple yarn.
Diese Aufgabe wird durch die Vorgarnspule des unabhängigen Anspruchs gelöst. Die abhängigen Ansprüche stellen bevorzugte Ausführungsformen der Erfindung dar.This object is achieved by the roving bobbin of the independent claim. The dependent claims represent preferred embodiments of the invention.
Bei einer erfindungsgemäßen, insbesondere durch das nachfolgend beschriebene Verfahren hergestellten, Vorgarnspule mit einem Vorgarn aus Kunstfasern zur Weiterverarbeitung zu einem Garn, ist das Vorgarn als Stäpelfaserband auf die Vorgarnspule aufgespult, wobei die Fasern des Stapelfaserbandes im Wesentlichen in paralleler Ausrichtung zueinander nahezu verdrehungsfrei gegeneinander angeordnet sind. Unter nahezu verdrehungsfrei ist dabei zu verstehen, dass eine Verdrehung der Fasern des Stapelbandes, insofern vorhanden, einer Verdrehung der Fasern der bei dem beschriebenen Herstellungsverfahren als Ausgangsprodukt verwendeten Halbfabrikate entspricht, d.h. keine wesentliche zusätzliche Verdrehungen vorhanden ist. Insbesondere hat eine evtl. vorhandene minimale Verdrehung keinen, für die Verstreckbarkeit des Vorgarns wesentlichen Einfluss auf dessen Festigkeit. Vorteilhaft handelt es sich dabei um eine Kreuzspule. Dadurch, dass das Vorgarn auf einer Spule aufgewickelt ist, kann es ohne Beeinträchtigung insbesondere der Produktionsgeschwindigkeit des Vorgarns für langsamere Folgeprozesse auf der Spule als Vorlagespule dienen. Es wird somit eine besonders wirtschaftliche Herstellung von Stapelgarnen mit einer echten Verdrehung, z.B. mittels einer Ringspinnmaschine oder einer Zwirnmaschine, ermöglicht.In an inventive, in particular by the method described below, roving bobbin with a roving of synthetic fibers for further processing into a yarn, the roving is wound as a staple fiber ribbon on the roving, the fibers of the staple fiber ribbon are arranged substantially parallel to each other in almost no rotation against each other , In this context, the term "virtually torsion-free" is understood to mean that twisting of the fibers of the stacking belt, if present, corresponds to a twisting of the fibers of the semi-finished products used as starting material in the described production method, i. no significant additional twists is present. In particular, a possibly present minimum twist has no significant influence on the strength of the roving for the stretchability of the roving. Advantageously, this is a cross-wound bobbin. Characterized in that the roving is wound on a spool, it can serve as a supply spool without affecting in particular the production speed of the roving for slower follow-up processes on the spool. There is thus a particularly economical production of stacking yarns with a true twist, e.g. by means of a ring spinning machine or a twisting machine allows.
Zur Weiterverarbeitung zu feinen Garnen weisen die einzelnen Fasern des Stapelfaserbandes bevorzugt eine Feinheit von 0,3 bis 5 Dezitex auf.For further processing into fine yarns, the individual fibers of the staple fiber band preferably have a fineness of 0.3 to 5 decitex.
Wenn das Vorgarn eine Feinheit von weniger als 150 tex aufweist, lässt sich das Vorgarn besonders gut auf eine Kreuzspule aufwickeln.If the roving has a fineness of less than 150 tex, the roving can be particularly well wound up on a cross-wound bobbin.
Die erfindungsgemäße Vorgarnspule wird bevorzugt mit dem nachfolgend beschriebenen Verfahren zur Herstellung eines Vorgarns auf einer Vorgarnspule, hergestellt. Die erfindungsgemäße Vorlagespule eignet sich insbesondere als Vorlagespule für eine Ringspinnmaschine oder eine Zwirnmaschine. Bei dem Verfahren wird aus mindestens einem vollständig verstreckten Halbfabrikat (Fully Drawn Yarn FDY), das in Multifilamentform vorliegt, nach einem Zuführen des Halbfabrikats in mindestens eine Streckbrechzone, und einer Reißkonvertierung des Halbfabrikats in der Streckbrechzone in ein Stapelfaserband, die Vorgarnspule durch Aufwickeln des als Stapelfaserband vorliegenden Vorgarns auf die Vorgarnspule erstellt.The roving bobbin according to the invention is preferably produced by the method described below for producing a roving on a roving bobbin. The feed bobbin according to the invention is particularly suitable as a supply bobbin for a ring spinning machine or a twisting machine. In the method, from at least one fully stretched semi-finished product (Fully Drawn Yarn FDY), which is in multifilament form, after feeding the semifinished product into at least one stretch breaking zone, and a break conversion of the semi-finished product in the stretch breaking zone into a staple fiber ribbon, which creates the roving bobbin by winding the roving staple ribbon onto the roving bobbin.
Der Erfindung liegt die Erkenntnis zugrunde, dass es, obwohl das Stapelfaserband nicht verfestigt sind, und damit unter Zugspannung die einzelnen Fasern leicht aneinander vorbeigleiten können, möglich ist, das nicht verfestigte Stapel band auf eine Spule aufzuwickeln. Dadurch kann das so erstellte Vorgarn mit einer hohen Herstellungsgeschwindigkeit produziert werden und in einem Nachfolgeprozess auf einer anderen Maschine als Vorlagematerial für einen langsamer laufenden Garnveredelungsprozess bereitgehalten werden. Somit ist das wirtschaftliche Betreiben des Streckbrechprozesses auch dann möglich, wenn z.B. eine Ringspinnmaschine oder eine Zwirnmaschine mit dem so erstellten Vorgarn bestückt werden soll. In dem Stapelfaserband liegen die Fasern in im wesentlichen paralleler Ausrichtung vor, so dass das Vorgarn noch verstreckbar ist. Das aufgespulte Vorgarn bzw. das Stapelfaserband ist nicht, insbesondere durch eine ein Drehmoment auf das Stapelfaserband aufbringende Düse, z.B. eine Lufttexturierdüse, unter einer Verfestigungsspannung stehend verfestigt, d.h. zu einem Stapelgarn konsolidiert. Es handelt sich bei der erfindungsgemäß hergestellten Vorgarnspule also um ein aufgespultes Roving mit einer niedrigen Festigkeit und im Wesentlichen ohne eine Verdrehung der Fasern des Stapelbandes gegeneinander.The invention is based on the finding that, although the staple fiber tape is not solidified, and thus the individual fibers can easily slip past each other under tension, it is possible to wind the non-solidified staple ribbon on a spool. As a result, the roving thus produced can be produced at a high production speed and kept in a subsequent process on another machine as a template material for a slower running yarn finishing process. Thus, the economical operation of the stretch breaking process is possible even if e.g. a ring spinning machine or a twisting machine to be equipped with the thus created roving. In the staple fiber ribbon, the fibers are in a substantially parallel orientation so that the roving is still stretchable. The coiled roving or staple fiber band is not, in particular by a nozzle applying a torque to the staple fiber band, e.g. an air-texturing nozzle solidified under a solidification stress, i. consolidated into a staple yarn. Thus, the roving bobbin produced according to the invention is a wound roving with a low strength and essentially without a twisting of the fibers of the stacking band against each other.
Um gleichmäßige Produktionsbedingungen und insbesondere ein gleichmäßiges Aufwickeln des Vorgarns auf die Vorgarnspule zu erreichen, durchläuft das Stapelfaserband bevorzugt vor dem Aufwickeln eine Fördervorrichtung.In order to achieve uniform production conditions and in particular a uniform winding of the roving onto the roving bobbin, the staple fiber band preferably passes through a conveying device before being wound up.
Letzteres ist insbesondere dann vorteilhaft, wenn als Vorgarnspule eine Kreuzspule erstellt wird. Eine Kreuzspule ist weniger beschädigungsanfällig als eine Spule, auf der das Vorgarn lediglich in parallelen Wicklungen aufgewickelt ist. Dadurch ist eine derartige Spule transportstabiler. Eine Kreuzspule kann ferner mit einer Fadenreserve als Vorlagespule verwendet werden. Bei einem derartigen Einsatz ist ein quasi endloser Herstellungsprozess mit einer derartigen Vorlagespule möglich, wenn die Fadenreserve mit einer Anschlussspule verbunden wird.The latter is particularly advantageous when a cross-wound bobbin is created as a roving bobbin. A cheese is less susceptible to damage than a coil on which the roving is wound only in parallel windings. As a result, such a coil is transport stable. A cross-wound bobbin can also be used with a thread reserve as a supply spool. In such an application, a quasi-endless manufacturing process with such a supply bobbin is possible if the thread reserve is connected to a connecting coil.
Besonders bevorzugt wird vor dem Aufwickeln das Stapelfaserband vorübergehend stabilisiert. Unter vorübergehend wird dabei verstanden, dass die Stabilisierung beim auf die Vorgarnspule aufgewickelten Vorgarn nicht mehr vorhanden ist, d.h. entweder sich ohne weitere Maßnahmen von selbst aufgelöst hat oder aktiv wieder aufgelöst wurde. Dadurch ist es möglich, höhere Produktionsgeschwindigkeiten zu erreichen, da durch die vorübergehende Stabilisierung des Stapelfaserbands in Bereichen seines Fadenlaufes, wo eine besondere mechanische Beanspruchung auftritt, z.B. an Fadenführungen oder der beschriebenen Fördervorrichtung, weniger verstreckt wird und damit geringere Qualitätsbeeinträchtigungen oder Produktionsunterbrechungen durch Fadenrisse auftreten.Particularly preferably, the staple fiber ribbon is temporarily stabilized before being wound up. By temporary it is meant that the stabilization is no longer present in the roving wound on the roving bobbin, i. E. either dissolved itself without further measures or was actively dissolved again. This makes it possible to achieve higher production speeds, since the temporary stabilization of the staple fiber band in areas of its yarn path where a special mechanical stress occurs, e.g. on thread guides or the described conveying device is less stretched and thus lower quality impairments or production interruptions occur by thread breaks.
Das vorübergehende Stabilisieren kann vorteilhaft durch Aufbringen eines Drehmoments auf das Stapelfaserband durch eine Düse erfolgen, wobei eine durch das Drehmoment erfolgte Verdrehung der Fasern des Stapelfaserbandes vor dem Aufwickeln wieder aufgelöst wird. Bei entsprechender Anordnung der Düse im Fadenlauf wird sich die Verdrehung der Fasern selbsttätig wieder auflösen, da eine Fixierung der Verdrehung, z.B. durch eine auf eine Heizzone folgende Kühlzone im Fadenlauf, unterbleibt.The temporary stabilization can be advantageously carried out by applying a torque to the staple fiber ribbon through a nozzle, wherein a twisting of the fibers of the staple fiber ribbon by the torque is dissolved before winding again. With an appropriate arrangement of the nozzle in the yarn path, the twist of the fibers will automatically resolve again, since a fixation of the rotation, e.g. by a following in a heating zone cooling zone in the threadline, is omitted.
Bevorzugt wird das Halbfabrikat aus einem teilweise oder gering orientierten Garn hergestellt, wobei das orientierte Garn einer Streckzone zugeführt wird und in der Streckzone zu dem Halbfabrikat verstreckt wird. Dadurch kann das vollständig verstreckte Garn, das als Ausgangsprodukt des beschriebenen Verfahrens zur Herstellung der erfindungsgemäßen Vorgarnspule benötigt wird, bereit gestellt werden. Es wird dann also nicht ein FDY als Vorlage verwendet sondern z.B. ein POY. Das POY wird in einer Streckzone, in einer vorgeschalteten Stufe an der Vorgarnherstellungsmaschine mit der das genannte Verfahren durchgeführt wird, zu einem FDY, also dem vollständig verstreckten Halbfabrikat, inline, d.h. als Teilverfahrensschritt des Verfahrens, verstreckt.Preferably, the semi-finished product is made of a partially or slightly oriented yarn, wherein the oriented yarn is fed to a draw zone and in the Stretching zone is stretched to the semi-finished product. As a result, the completely drawn yarn which is required as the starting product of the process described for producing the roving bobbin according to the invention can be provided. It is then not a FDY used as a template but a POY, for example. The POY is stretched in-line, ie as a partial process step of the process, in a draw zone, in an upstream stage on the roving production machine with which said method is carried out, to form a FDY, ie the completely drawn semifinished product.
Dabei durchläuft das Halbfabrikat zwischen der Streckzone und der Streckbrechzone bevorzugt eine Kühlzone. Dies ermöglicht eine sehr hohe Herstellungsgeschwindigkeit.The semifinished product preferably passes through a cooling zone between the draw zone and the stretch break zone. This allows a very high production speed.
Eine Vorgarnherstellungsmaschine, die zur Durchführung des beschriebenen Verfahrens eingerichtet ist, weist mindestens eine als Streckbrechzone ausgebildete Maschinenposition auf, wobei die Streckbrechzone durch individuell antreibbare Walzen ausgebildet ist. Dabei ist an der Vorgarnherstellungsmaschine eine Aufspuleinheit vorgesehen, eingerichtet, eine Vorgarnspule, bevorzugt eine Kreuzspule, durch Aufwickeln eines nach der Streckbrechzone als Stapelfaserband vorliegenden Vorgarns zu erstellen. An dieser Vorgarnherstellungsmaschine können auf vorteilhafte Weise insbesondere die zur Reißkonvertierung vorgesehenen Maschinenteile, wie im Stand der Technik beschrieben vorgesehen sein. Insbesondere können mehrere Streckbrechzonen vorteilhaft hintereinander angeordnet sein und/oder es kann vorgesehen sein, dass die Vorgarnherstellungsmaschine zur gleichzeitigen Zuführung mehrerer Filamentgarne als Halbfabrikate in die Streckbrechzonen eingerichtet ist. Mit der Vorgarnherstellungsmaschine kann eine Vorgarnspule mit einem als Stapelfaserband vorliegenden Vorgarn hergestellt werden, wodurch die beschriebenen Vorteile erreichbar sind.A roving production machine, which is set up to carry out the described method, has at least one machine position designed as a stretch breaking zone, wherein the stretch breaking zone is formed by individually drivable rolls. In this case, a winding unit is provided on the roving production machine, designed to create a roving bobbin, preferably a cross-wound bobbin, by winding up a roving present as a staple fiber band after the stretch breaking zone. In this roving production machine can be provided in an advantageous manner in particular provided for tear conversion machine parts, as described in the prior art. In particular, several stretch breaking zones can advantageously be arranged one behind the other and / or it can be provided that the roving production machine is set up for the simultaneous feeding of a plurality of filament yarns as semi-finished products into the stretch breaking zones. With the roving production machine, a roving bobbin with a as Staple fiber ribbon present roving are produced, whereby the advantages described can be achieved.
Bevorzugt ist zwischen der Streckbrechzone und der Aufspuleinheit eine Fördervorrichtung vorgesehen, eingerichtet, das Stapelfaserband mit einer bevorzugt kontrollierten Fadenspannung zur Aufspuleinheit zu fördern. Dies ermöglicht, eine gleichmäßigere Vorgarnqualität herzustellen.Preferably, a conveying device is provided between the stretch breaking zone and the winding unit, designed to convey the staple fiber strip with a preferably controlled thread tension to the winding unit. This makes it possible to produce a more even roving quality.
Insbesondere ist besonders bevorzugt zwischen der Streckbrechzone und der Aufspuleinheit eine Stabilisierungsvorrichtung vorgesehen, um das Stapelfaserband vorübergehend zu stabilisieren. Störungsbedingte Produktionsunterbrechungen, z.B. durch Fadenbrüche an Fadenführungen oder der Fördervorrichtung, werden so minimiert.In particular, a stabilization device is particularly preferably provided between the stretch breaking zone and the winding unit in order to temporarily stabilize the staple fiber tape. Faulty production stoppages, e.g. By thread breaks on thread guides or the conveyor, are minimized.
Die Stabilisierungsvorrichtung kann vorteilhaft eine Düse aufweisen, eingerichtet, das vorübergehende Stabilisieren durch Aufbringen eines Drehmoments auf das Stapelfaserband durchzuführen, wobei sich eine durch das Drehmoment erfolgte Verdrehung der Fasern des Stapelfaserbandes vor dem Aufwickeln wieder auflöst. Mittels der Düse kann die vorrübergehende Stabilisierung auf bewährte Art und Weise erreicht werden. Die Verdrehung löst sich im weiteren Fadenlauf von selbst wieder auf, da keine Fixierung der Verdrehung vorgenommen wird.The stabilizing device may advantageously have a nozzle, configured to carry out the temporary stabilization by applying a torque to the staple fiber ribbon, wherein a twisting of the fibers of the staple fiber ribbon by the torque dissolves before winding again. By means of the nozzle, the temporary stabilization can be achieved in a proven manner. The twist dissolves in the further threadline by itself again, since no fixation of the rotation is made.
Vorgeschlagen wird eine Vorgarnspule, insbesondere eine Kreuzspule, mit einem Vorgarn aus Kunstfasern zur Weiterverarbeitung zu einem Garn. Das Vorgarn ist als Stapelfaserband auf die Vorgarnspule aufgespult, wobei die Fasern des Stapelfaserbandes im Wesentlichen in paralleler Ausrichtung zueinander nahezu verdrehungsfrei gegeneinander angeordnet sind.A roving bobbin, in particular a cheese, with a roving made of synthetic fibers for further processing into a yarn is proposed. The roving is wound as a staple fiber ribbon on the roving bobbin, wherein the fibers of the staple fiber band are arranged substantially parallel to each other in almost no rotation against each other.
Die Erfindung beschränkt sich nicht auf die vorstehend angegebenen Ausführungsbeispiele. Vielmehr ist eine Anzahl von Varianten denkbar, welche auch bei grundsätzlich anders gearteter Ausführung von den Merkmalen der Erfindung Gebrauch machen. Insbesondere sind die unterschiedlichen dargestellten Merkmale der Erfindung mit den Merkmalen des angegebenen Standes der Technik kombinierbar, soweit keine endgültige Verfestigung des Vorgans vor dem Aufspulen auf die Vorgarnspule erfolgt.The invention is not limited to the embodiments given above. Rather, a number of variants are conceivable, which make use of the features of the invention even with fundamentally different type of execution. In particular, the different illustrated features of the invention can be combined with the features of the cited prior art, provided that no final consolidation of the Vorgans before being wound onto the roving bobbin.
Claims (3)
dadurch gekennzeichnet, dass
das Vorgarn als Stapelfaserband auf die Vorgarnspule aufgespult ist, wobei die Fasern des Stapelfaserbandes im Wesentlichen in paralleler Ausrichtung zueinander nahezu verdrehungsfrei gegeneinander angeordnet sind.Roving bobbin, in particular cross-wound bobbin, with a roving made of synthetic fibers for further processing into a yarn,
characterized in that
the roving is wound as a staple fiber ribbon on the roving bobbin, wherein the fibers of the staple fiber ribbon are arranged substantially parallel to each other in almost no rotation against each other.
dadurch gekennzeichnet, dass
die einzelnen Fasern des Stapelfaserbandes eine Feinheit von 0,3 bis 5 Dezitex aufweisen.Roving bobbin according to claim 1,
characterized in that
the individual fibers of the staple fiber ribbon have a fineness of 0.3 to 5 decitex.
dadurch gekennzeichnet, dass
das Vorgarn eine Feinheit von weniger als 150 tex aufweist.Roving bobbin according to at least one of claims 1 to 2,
characterized in that
the roving has a fineness of less than 150 tex.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05015833A EP1777326A1 (en) | 2005-07-21 | 2005-07-21 | Roving Bobbin |
| PCT/EP2006/006893 WO2007009666A1 (en) | 2005-07-21 | 2006-07-14 | Roving bobbin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05015833A EP1777326A1 (en) | 2005-07-21 | 2005-07-21 | Roving Bobbin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1777326A1 true EP1777326A1 (en) | 2007-04-25 |
Family
ID=35285545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05015833A Withdrawn EP1777326A1 (en) | 2005-07-21 | 2005-07-21 | Roving Bobbin |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1777326A1 (en) |
| WO (1) | WO2007009666A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2737060B1 (en) | 2011-07-27 | 2019-03-06 | Flash Therapeutics | Method for the production of retroviral particles useful for transducing eukaryotic cells |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB668012A (en) * | 1949-07-30 | 1952-03-12 | Schweizerische Leinen Ind A G | Apparatus for winding slivers into cheeses |
| DE1005415B (en) * | 1952-11-03 | 1957-03-28 | Hugo Schaffeld Fa | Method for winding roving on a roving card to wind |
| US4080778A (en) * | 1975-04-01 | 1978-03-28 | E. I. Du Pont De Nemours And Company | Direct spinning process for stretch-breaking continuous filaments to form entangled yarn |
| US4837117A (en) * | 1986-12-16 | 1989-06-06 | E. I. Du Pont De Nemours And Company | Composites of stretch broken aligned fibers of carbon and glass reinforced resin |
| WO2000077283A2 (en) | 1999-06-14 | 2000-12-21 | E.I. Du Pont De Nemours And Company | Stretch break method and product |
| US20040028896A1 (en) * | 2002-08-07 | 2004-02-12 | James Crawford | Pitch based graphite fabrics and needled punched felts for fuel cell gas diffusion layer substrates and high thermal conductivity reinforced composites |
| EP1522614A1 (en) | 2003-10-06 | 2005-04-13 | Schärer Schweiter Mettler AG | Device for producing synthetic staple yarns |
-
2005
- 2005-07-21 EP EP05015833A patent/EP1777326A1/en not_active Withdrawn
-
2006
- 2006-07-14 WO PCT/EP2006/006893 patent/WO2007009666A1/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB668012A (en) * | 1949-07-30 | 1952-03-12 | Schweizerische Leinen Ind A G | Apparatus for winding slivers into cheeses |
| DE1005415B (en) * | 1952-11-03 | 1957-03-28 | Hugo Schaffeld Fa | Method for winding roving on a roving card to wind |
| US4080778A (en) * | 1975-04-01 | 1978-03-28 | E. I. Du Pont De Nemours And Company | Direct spinning process for stretch-breaking continuous filaments to form entangled yarn |
| US4837117A (en) * | 1986-12-16 | 1989-06-06 | E. I. Du Pont De Nemours And Company | Composites of stretch broken aligned fibers of carbon and glass reinforced resin |
| WO2000077283A2 (en) | 1999-06-14 | 2000-12-21 | E.I. Du Pont De Nemours And Company | Stretch break method and product |
| US20040028896A1 (en) * | 2002-08-07 | 2004-02-12 | James Crawford | Pitch based graphite fabrics and needled punched felts for fuel cell gas diffusion layer substrates and high thermal conductivity reinforced composites |
| EP1522614A1 (en) | 2003-10-06 | 2005-04-13 | Schärer Schweiter Mettler AG | Device for producing synthetic staple yarns |
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| Publication number | Publication date |
|---|---|
| WO2007009666A1 (en) | 2007-01-25 |
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