EP0396646B2 - Melt-spinning device with high winding-off speeds - Google Patents

Melt-spinning device with high winding-off speeds Download PDF

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Publication number
EP0396646B2
EP0396646B2 EP89908959A EP89908959A EP0396646B2 EP 0396646 B2 EP0396646 B2 EP 0396646B2 EP 89908959 A EP89908959 A EP 89908959A EP 89908959 A EP89908959 A EP 89908959A EP 0396646 B2 EP0396646 B2 EP 0396646B2
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EP
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Prior art keywords
spinning
thread
spinneret
melt
spinning chamber
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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.)
Expired - Lifetime
Application number
EP89908959A
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German (de)
French (fr)
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EP0396646A1 (en
EP0396646B1 (en
Inventor
Horst Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Viscosuisse SA
Original Assignee
Rhone Poulenc Viscosuisse SA
Societe de la Viscose Suisse SA
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Application filed by Rhone Poulenc Viscosuisse SA, Societe de la Viscose Suisse SA filed Critical Rhone Poulenc Viscosuisse SA
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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
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
    • D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys

Definitions

  • the invention relates to a device for melt spinning with take-off speeds above 5000 m / min, consisting of a spinning block, with a spinneret package and a thread suction nozzle as well a spinning chamber which is arranged between the spinneret pack and the thread suction nozzle and with their inlet opening with the spinning nozzle package and with their outlet opening with the thread take-off nozzle is connected gastight.
  • the filaments cool down critical process step.
  • the problem is that on the one hand the thread temperature is drastic lowered and on the other hand the thread speed must be increased.
  • Thread extraction nozzles for thread cooling during melt spinning at speeds above 5000 m / min are known. On the one hand, they suck in the threads and, on the other hand, they serve to parallel the threads to supply them with a cooling gas.
  • such a nozzle is used in connection with a heating chamber, whereby the heating chamber is located directly under the spinning block.
  • EP-A-0 244 217 also describes the use of such a nozzle for the same purpose in Connection described with a venturi nozzle operated with a hot gas, said venturi nozzle is also attached directly under the spinning block.
  • Both the heating chamber and the hot gas venturi, both directly Attached under the spinning block are used, among other things, to improve spinning and thread properties. As far as the thread properties are concerned, the dyeability in particular becomes positive affected.
  • the thread suction nozzle for thread cooling is between 50 and 600 in the case of the heating chamber mm below the same, in the case of the Venturi nozzle at a sufficient distance below that that there escaping air does not affect the operation of the same.
  • the threads arrive there as an open bundle and are still quite fluid on their way there due to the delayed thread cooling. i.e. little solidified.
  • the object of the invention is to provide a device which allows the titer regularity and to improve the strength of a very fast spun filament.
  • Another task is to reduce the energy-intensive operation of a heating chamber or the likewise energy-consuming specific hot air consumption.
  • the object is achieved in a device according to the characterizing part of claim 1.
  • the arrangement according to the invention creates a negative pressure in the spinning chamber which is targeted Cooling air sucks in from the environment and surprisingly has an excellent titer regularity along the resulting thread is achieved.
  • the spinning chamber with its inlet opening on the spinning block and with it Outlet opening is attached to the thread suction nozzle in a gastight manner.
  • the attachment is done in a known manner and using sealing material.
  • the formation of the bottom of the spinning chamber to one Funnel has advantages in terms of air flow.
  • the spinning chamber essentially consists of a tube closed on its periphery, which only in a certain range, namely from 100 to 250 mm, in particular from 200 to 250 mm from the spinneret pack is designed as a sieve tube. Instead of a sieve tube, the perforated area with any openings for gas passage.
  • the air permeability of the sieve tube should be 20 to 40%, i.e. the perforated one 20 to 40% of the area should be provided with openings.
  • a filament produced with the device according to the invention has a titer irregularity from ⁇ 0.60% Uster on.
  • a melt-spinnable granulate is formed in the spinning block 1 in a known manner melted and clamped into filaments 5 through the spinneret pack 2. Due to the suction effect of the A thread suction nozzle 7 creates a negative pressure in the spinning chamber 3. This causes room air to flow through the Sieve tube 4 of the spinning chamber 3 and cools the filaments 5, which at high speed by means of Coil 10 are withdrawn. Before the filaments 5 are wound on the bobbin 10, they pass through the thread oiler 8 and the swirling nozzle 9.
  • a polyester granulate with an intrinsic viscosity (IV) of 0.62 dl / g is melted at 298 ° C. in spinning block 1, spun into 24 filaments with a total titer of 50 dtex at a take-off speed of 5500 m / min.
  • the spinning chamber was 460 mm long and perforated between 150 and 250 mm below the nozzle plate with a permeability of 38%.
  • the thread suction nozzle 7 was subjected to an air pressure of 100 kPa (1 bar) and indicated an air consumption of 5.6 Nm 3 / h. After leaving the thread suction nozzle 7, the thread was provided with a spin preparation and swirled in a known manner.
  • the table shows that a filament thread produced with the device according to the invention has a has significant improvement in yarn cleanliness and an increase in strength.

Abstract

A melt-spinning device comprises an essentially sealed spinning chamber (3) mounted in a gas-tight manner between a spinneret bundle (2) and a yarn suction device (7). The spinning chamber (3) is partially perforated only in the region located 150 to 350 mm from the spinneret bundle. At a winding-off speed of 5500 m/min, the filament produced has a count irregularity less than 0.60 % U.

Description

Die Erfindung betrifft eine Vorrichtung zum Schmelzspinnen mit Abzugsgeschwindigkeiten über 5000 m/min, bestehend aus einem Spinnblock, mit einem Spinndüsenpaket und einer Fadenabsaugdüse sowie einer Spinnkammer die zwischen dem Spinndüsenpaket und der Fadenabsaugdüse angeordnet ist und mit ihrer Eintrittsöffnung mit dem Spinnpdüsenpaket und mit ihrer Austrittsöffnung mit der Fadenabzugdüse gasdicht verbunden ist.The invention relates to a device for melt spinning with take-off speeds above 5000 m / min, consisting of a spinning block, with a spinneret package and a thread suction nozzle as well a spinning chamber which is arranged between the spinneret pack and the thread suction nozzle and with their inlet opening with the spinning nozzle package and with their outlet opening with the thread take-off nozzle is connected gastight.

Beim Schmelzspinnen bei hohen Abzugsgeschwindigkeiten bereitet die Abkühlung der Filamente den kritischen Verfahrensschritt. Die Problematik liegt darin, dass einerseits die Fadentemperatur drastisch gesenkt und andererseits die Fadengeschwindigkeit erhöht werden muss.When melt spinning at high take-off speeds, the filaments cool down critical process step. The problem is that on the one hand the thread temperature is drastic lowered and on the other hand the thread speed must be increased.

Fadenabsaugdüsen zum Fadenkühlen beim Schmelzspinnen mit Geschwindigkeiten über 5000 m/min sind bekannt. Sie saugen einerseits die Fäden an und dienen andererseits dazu, den Fäden parallel zu denselben ein Kühlgas zuzuführen.Thread extraction nozzles for thread cooling during melt spinning at speeds above 5000 m / min are known. On the one hand, they suck in the threads and, on the other hand, they serve to parallel the threads to supply them with a cooling gas.

Nach der EP-A-0 056 963 wird eine solche Düse in Verbindung mit einer Heizkammer verwendet, wobei die Heizkammer direkt unter den Spinnblock angebracht ist.According to EP-A-0 056 963, such a nozzle is used in connection with a heating chamber, whereby the heating chamber is located directly under the spinning block.

Auch in der EP-A-0 244 217 wird die Verwendung einer solchen Düse zum gleichen Zweck in Verbindung mit einer mit einen heissen Gas betriebenen Venturi-Düse beschrieben, wobei die Venturi-Düse ebenfalls direkt unter dem Spinnblock angebracht ist.EP-A-0 244 217 also describes the use of such a nozzle for the same purpose in Connection described with a venturi nozzle operated with a hot gas, said venturi nozzle is also attached directly under the spinning block.

Sowohl die Heizkammer als auch die mit einem heissen Gas betriebene Venturi-Düse, beide direkt unter dem Spinnblock angebracht, dienen unter anderem zur Verbesserung von Spinnlauf und Fadeneigenschaften. Was die Fadeneigenschaften betrifft so wird durch diese vor allem die Färbbarkeit positiv beeinflusst.Both the heating chamber and the hot gas venturi, both directly Attached under the spinning block are used, among other things, to improve spinning and thread properties. As far as the thread properties are concerned, the dyeability in particular becomes positive affected.

Die Fadenabsaugdüse zum Fadenkühlen befindet sich im Falle der Heizkammer zwischen 50 und 600 mm unterhalb derselben, im Falle der Venturi-Düse in hinreichenden Abstand darunter, dass die dort austretende Luft den Betrieb derselben nicht beeinträchtigt. Die Fäden gelangen als offene Bündel dort hinein und sind auf ihrem Wege dorthin wegen der verzögerten Fadenabkühlung, noch ziemlich flüssig. d.h. wenig verfestigt.The thread suction nozzle for thread cooling is between 50 and 600 in the case of the heating chamber mm below the same, in the case of the Venturi nozzle at a sufficient distance below that that there escaping air does not affect the operation of the same. The threads arrive there as an open bundle and are still quite fluid on their way there due to the delayed thread cooling. i.e. little solidified.

Auf diesem Wegstück sind sie in keiner Weise gegen seitliche Auswanderungen, d.h. gegen Auswanderungen senkrecht zur Fadenlaufrichtung stabilisiert. Solche seitlichen Auswanderungen führen zu sinusähnlichen Titerschwankungen längs des so hergestellten Fadenbündels, die ihrerseits die Färbbarkeit und die Festigkeit negativ beeinflussen.On this part of the way they are in no way against lateral emigration, i.e. against emigration stabilized perpendicular to the thread running direction. Such lateral emigration leads to sinus-like ones Fluctuations in titer along the thread bundle thus produced, which in turn affects the colorability and the Adversely affect strength.

Aufgabe der Erfindung ist es, eine Vorrichtung zu schaffen, welche es erlaubt die Titerregelmässigkeit und die Festigkeit eines sehr schnellgesponnenen Filamentes zu verbessern.The object of the invention is to provide a device which allows the titer regularity and to improve the strength of a very fast spun filament.

Eine weitere Aufgabe besteht in der Reduktion des energieaufwendigen Betriebs einer Heizkammer bzw. des ebenfalls energieaufwendigen spezifischen Heiss-Luftverbrauches.Another task is to reduce the energy-intensive operation of a heating chamber or the likewise energy-consuming specific hot air consumption.

Die Lösung der Aufgabe besteht in einer Vorrichtung nach dem Kennzeichen von Anspruch 1.The object is achieved in a device according to the characterizing part of claim 1.

Durch die erfindungsgemässe Anordnung entsteht in der Spinnkammer ein Unterdruck, der gezielt Kühlluft aus der Umgebung ansaugt und durch den in überraschender Weise eine hervorragende Titerregelmässigkeit längs des resultierenden Fadens erzielt wird.The arrangement according to the invention creates a negative pressure in the spinning chamber which is targeted Cooling air sucks in from the environment and surprisingly has an excellent titer regularity along the resulting thread is achieved.

Es ist zweckmässig, wenn die Spinnkammer mit ihrer Eintrittsöffnung am Spinnblock und mit ihrer Austrittsöffnung an der Fadenabsaugdüse gasdicht befestigt ist. Die Befestigung erfolgt in bekannter Weise und unter Verwendung von Dichtungsmaterial. Die Ausbildung des Bodens der Spinnkammer zu einen Trichter hat luftströmungstechnische Vorteile.It is expedient if the spinning chamber with its inlet opening on the spinning block and with it Outlet opening is attached to the thread suction nozzle in a gastight manner. The attachment is done in a known manner and using sealing material. The formation of the bottom of the spinning chamber to one Funnel has advantages in terms of air flow.

Die Spinnkammer besteht im wesentlichen aus einem an seiner Peripherie geschlossenen Rohr, welches nur in einem bestimmten Bereich, und zwar von 100 bis 250 mm, insbesondere von 200 bis 250 mm von der Spinndüsenpaket entfernt als Siebrohr ausgebildet ist. Anstelle eines Siebrohres kann der perforierte Bereich mit beliebigen Öffnungen für den Gasdurchtritt versehen sein.The spinning chamber essentially consists of a tube closed on its periphery, which only in a certain range, namely from 100 to 250 mm, in particular from 200 to 250 mm from the spinneret pack is designed as a sieve tube. Instead of a sieve tube, the perforated area with any openings for gas passage.

Es ist zweckmässig die Öffnungen in einem Kreisring von 50 bis 150 mm Breite bzw. ein Siebrohr mit der gleichen Länge vorzusehen.It is advisable to use the openings in a circular ring with a width of 50 to 150 mm or a sieve tube the same length.

In jedem Fall soll die Luftdurchlässigkeit des Siebrohres 20 bis 40 % aufweisen, d.h., die perforierte Fläche soll 20 bis 40 % mit Öffnungen versehen sein.In any case, the air permeability of the sieve tube should be 20 to 40%, i.e. the perforated one 20 to 40% of the area should be provided with openings.

Ein mit der erfindungsgemässen Vorrichtung hergestelltes Filament weist eine Titerunregelmässigkeit von < 0.60 % Uster auf.A filament produced with the device according to the invention has a titer irregularity from <0.60% Uster on.

Die Erfindung soll anhand einer Zeichnung näher beschrieben werden.The invention will be described in more detail with reference to a drawing.

Es zeigen:

Fig. 1
eine schematische Spinneinrichtung mit der erfindungsgemässen Spinnkammer
Fig. 2
ein Uster-Diagramm eines mit der erfindungsgemässen Spinneinrichtung hergestellten Filamentes
In Fig. 1 ist ein Spinnblock mit 1 bezeichnet. Im Spinnblock 1 ist leicht zurückgesetzt ein Spinmdüsenpaket 2 vorgesehen. Eine Spinnkammer 3. welche bevorzugt aus einem nahezu über ihre ganze Länge geschlossenes Rohr besteht, weist in Abstand von etwa 200 bis 250 mm vom Spinndüsenpaket 2 einen als Siebrohr 4 bezeichneten gasdurchlässigen Ring auf. Die Spinnkammer 3 ist in ihrem unteren Teil zu einem Trichter 6 ausgebildet und so dimensioniert, dass die aus dem Spinndüsenpaket 2 austretenden Filamente 5 die Wand der Spinnkammer 3 nicht berühren können. Eine Fadenabsaugdüse ist mit dem Apex des Trichters 6 gasdicht verbunden und im Konvergenzpunkt des Filamentbündels vorgesehen. Es sind ferner ein Fadenöler 8, eine Verwirbelungsdüse 9 und eine Abzugsrolle 10 zur Weitergabe des Filamentfadens zum Spuler 10 vorgesehen. Anstelle der Abzugsrolle 10 kann auch direkt der Spuler eingesetzt werden.Show it:
Fig. 1
a schematic spinning device with the spinning chamber according to the invention
Fig. 2
a Uster diagram of a filament produced with the inventive spinning device
In Fig. 1, a spinning block is denoted by 1. In spin block 1, a spin nozzle package 2 is provided in a slightly reset manner. A spinning chamber 3, which preferably consists of a tube that is closed over almost its entire length, has a gas-permeable ring called a sieve tube 4 at a distance of about 200 to 250 mm from the spinneret pack 2. The lower part of the spinning chamber 3 is formed into a funnel 6 and is dimensioned such that the filaments 5 emerging from the spinneret pack 2 cannot touch the wall of the spinning chamber 3. A thread suction nozzle is connected gas-tight to the apex of the funnel 6 and is provided in the convergence point of the filament bundle. There are also a thread oiler 8, a swirling nozzle 9 and a take-off roller 10 for passing on the filament thread to the winder 10. Instead of the take-off roll 10, the winder can also be used directly.

Im Betrieb der Vorrichtung wird ein schmelzspinnbares Granulat in bekannter Weise im Spinnblock 1 aufgeschmolzen und durch das Spinndüsenpaket 2 in Filamente 5 verspannen. Durch die Saugwirkung der Fadenabsaugdüse 7 entsteht ein Unterdruck in der Spinnkammer 3. Dadurch strömt Raumluft durch das Siebrohr 4 der Spinnkammer 3 und kühlt die Filamente 5 ab, welche mit hoher Geschwindigkeit mittels der Spule 10 abgezogen werden. Bevor die Filamente 5 auf die Spule 10 aufgewickelt werden, durchlaufen sie den Fadenöler 8 und die Verwirbelungsdüse 9.During operation of the device, a melt-spinnable granulate is formed in the spinning block 1 in a known manner melted and clamped into filaments 5 through the spinneret pack 2. Due to the suction effect of the A thread suction nozzle 7 creates a negative pressure in the spinning chamber 3. This causes room air to flow through the Sieve tube 4 of the spinning chamber 3 and cools the filaments 5, which at high speed by means of Coil 10 are withdrawn. Before the filaments 5 are wound on the bobbin 10, they pass through the thread oiler 8 and the swirling nozzle 9.

Ausführungsbeispieleembodiments

Ein Polyestergranulat mit einer intrinsischen Viskosität (IV) von 0,62 dl/g wird bei 298°C im Spinnblock 1 aufgeschmolzen, zu 24 Filamenten mit einem Gesamttiter von 50 dtex mit einer Abzugsgeschwindigkeit von 5500 m/min versponnen. Die Spinnkammer war 460 mm lang und zwischen 150 und 250 mm unterhalb der Düsenplatte mit einer Perforation versehen mit einer Durchlässigkeit von 38 %. Die Fadenabsaugdüse 7 war dabei mit einem Luftdruck von 100 kPa (1 bar) beaufschlagt und zeigte einen Luftverbrauch von 5,6 Nm3/h an. Nach dem Verlassen der Fadenabsaugdüse 7 wurde der Faden in bekannter Weise mit einer Spinnpräparation versehen und verwirbelt.A polyester granulate with an intrinsic viscosity (IV) of 0.62 dl / g is melted at 298 ° C. in spinning block 1, spun into 24 filaments with a total titer of 50 dtex at a take-off speed of 5500 m / min. The spinning chamber was 460 mm long and perforated between 150 and 250 mm below the nozzle plate with a permeability of 38%. The thread suction nozzle 7 was subjected to an air pressure of 100 kPa (1 bar) and indicated an air consumption of 5.6 Nm 3 / h. After leaving the thread suction nozzle 7, the thread was provided with a spin preparation and swirled in a known manner.

Es resultiert ein Faden mit den in der Tabelle, Spalte 3 angegebenen Eigenschaften. ohne Spinnkammer mit erfindungsgemässer Spinnkammer Druck bar 1 1 Luftverbrauch Nm3/h 5,6 5,6 Dehnung % 63,0 59,8 Festigkeit cN/tex 28,1 34,1 Uster % 0,98 0.48 The result is a thread with the properties specified in the table, column 3. without spinning chamber with spinning chamber according to the invention Pressure bar 1 1 Air consumption Nm 3 / h 5.6 5.6 Strain % 63.0 59.8 Strength cN / tex 28.1 34.1 Uster% 0.98 00:48

Die Tabelle zeigt, dass ein mit der erfindungsgemässen Vorrichtung hergestellter Filamentfaden eine wesentliche Verbesserung in der Garnsauberkeit und eine Erhöhung der Festigkeit aufweist.The table shows that a filament thread produced with the device according to the invention has a has significant improvement in yarn cleanliness and an increase in strength.

Claims (5)

  1. An apparatus for melt spinning with pull-off speeds of more than 5,000 m/min, comprising a spinning block (1), with a spinneret (2) and a yarn suction nozzle (7), as well as a spinning chamber (3) which is disposed between the spinneret (2) and the yarn suction nozzle (7) and with its inlet opening to the spinneret (2) and hermetically connected with its outlet opening to the yarn suction nozzle (7), characterized in that the essentially closed off spinning chamber (3), is constructed partially as a perforated tube (4), which is disposed at a distance of 100 to 250 mm from the spinneret (2).
  2. The apparatus of claim 1, characterised in that the lower part of the spinning chamber (3) is formed into a funnel (6).
  3. The apparatus of claim 1, characterised in that the wall of the funnel (6) is rounded off.
  4. The apparatus of claim 3, characterised in that the perforated tube (4) has a length of 50 to 150 mm.
  5. The apparatus of claim 3, characterised in that the perforated tube (4) has an air permeability of 20 to 40%.
EP89908959A 1988-08-24 1989-08-14 Melt-spinning device with high winding-off speeds Expired - Lifetime EP0396646B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH314688 1988-08-24
CH314688 1988-08-24
CH3146/88 1988-08-24
PCT/CH1989/000147 WO1990002222A1 (en) 1988-08-24 1989-08-14 Melt-spinning device with high winding-off speeds and filament produced by means of the device

Publications (3)

Publication Number Publication Date
EP0396646A1 EP0396646A1 (en) 1990-11-14
EP0396646B1 EP0396646B1 (en) 1993-12-22
EP0396646B2 true EP0396646B2 (en) 2001-01-03

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EP89908959A Expired - Lifetime EP0396646B2 (en) 1988-08-24 1989-08-14 Melt-spinning device with high winding-off speeds

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EP (1) EP0396646B2 (en)
JP (2) JPH03500908A (en)
BR (1) BR8907063A (en)
DE (1) DE58906504D1 (en)
WO (1) WO1990002222A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52133048U (en) * 1976-04-05 1977-10-08
SG67284A1 (en) * 1991-09-06 1999-09-21 Akzo Nobel Nv Apparatus for high speed spinning multifilament yarns and use thereof
BR9400682A (en) * 1993-03-05 1994-10-18 Akzo Nv Apparatus for the fusing spinning of multifilament yarns and their application

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA944913A (en) * 1970-04-01 1974-04-09 Toray Industries, Inc. Apparatus and method for manufacturing continuous filaments from synthetic polymers
JPS5411715B2 (en) * 1971-10-05 1979-05-17
JPS5167408A (en) * 1974-12-02 1976-06-11 Toray Industries SHINKUBOSHIHOHO
KR860000205B1 (en) * 1981-01-19 1986-03-03 세꼬 마오미 Polyester fibers
US5034182A (en) * 1986-04-30 1991-07-23 E. I. Du Pont De Nemours And Company Melt spinning process for polymeric filaments

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Publication number Publication date
BR8907063A (en) 1991-01-02
EP0396646A1 (en) 1990-11-14
DE58906504D1 (en) 1994-02-03
JP2535880Y2 (en) 1997-05-14
JPH03500908A (en) 1991-02-28
JPH081665U (en) 1996-12-17
EP0396646B1 (en) 1993-12-22
WO1990002222A1 (en) 1990-03-08

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