EP0086426B1 - Process and device for the preparation of synthetic fibres - Google Patents

Process and device for the preparation of synthetic fibres Download PDF

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Publication number
EP0086426B1
EP0086426B1 EP83101131A EP83101131A EP0086426B1 EP 0086426 B1 EP0086426 B1 EP 0086426B1 EP 83101131 A EP83101131 A EP 83101131A EP 83101131 A EP83101131 A EP 83101131A EP 0086426 B1 EP0086426 B1 EP 0086426B1
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EP
European Patent Office
Prior art keywords
cooling water
trough
melt
led
strands
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.)
Expired
Application number
EP83101131A
Other languages
German (de)
French (fr)
Other versions
EP0086426A3 (en
EP0086426A2 (en
Inventor
Hugo Dr. Strehler
Guenter Valentin
Werner Dr. Hoerauf
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.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of EP0086426A2 publication Critical patent/EP0086426A2/en
Publication of EP0086426A3 publication Critical patent/EP0086426A3/en
Application granted granted Critical
Publication of EP0086426B1 publication Critical patent/EP0086426B1/en
Expired legal-status Critical Current

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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
    • D01D5/08—Melt spinning methods
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
    • D01D5/0885—Cooling filaments, threads or the like, leaving the spinnerettes by means of a liquid
    • 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
    • D01D13/00—Complete machines for producing artificial threads

Definitions

  • the invention relates to a method for producing threads from synthetic materials.
  • the invention further relates to a device for carrying out the method according to the preamble of claim 3.
  • a melt made of synthetic materials such as polyamide, polyester, polyethylene terephthalate, polybutylene terephthalate, polystyrene has been introduced into a cooling water bath through the nozzle openings of a nozzle plate, through which the individual melt streams have been guided in an essentially horizontal cooling section to the desired strength.
  • the length of the cooling section to be selected mainly depends on four parameters: diameter of the individual melt streams, their flow rate, additives in the melt and cooling water temperature.
  • the cooling troughs used for this purpose have lengths of 10 to 15 m. In addition to this large space requirement, it is disadvantageous that the length of the cooling section cannot be varied with regard to changing parameters.
  • the melt of synthetic material is passed with the aid of a pump, for example a gear pump, via a feed 1 into a container 3 provided with a heating jacket 2 and then driven through the nozzle openings 4 of a nozzle plate 5, so that individual melt streams 6 which are to be regarded as threads are formed. These then pass into a trough 7, in which they are guided to a quench by means of a first deflecting shaft 8 against a cooling water flow between an inlet 9 and an outlet 10 at a depth of up to 300 times their diameter.
  • the length of this essentially horizontal cooling section is dimensioned at a transport speed of the melt streams of 50 to 150 meters per minute to 500 to 1500 times the diameter of a single melt stream.
  • melt streams on this cooling section have been quenched to such an extent that their surface strength is sufficient to absorb the weight of the vertically hanging melt stream and a tensile force P, they are by means of a second deflecting shaft 11 through an opening 12 in the bottom of the tub in a subsequent, in steered substantially vertically arranged tube 13, the length of which in practical operation is approximately 4 to 6 times the distance between the center of the opening of the tub base and the nozzle plate.
  • a hollow cylinder 15 is slidably arranged on rails 16, which serves as a holding and guiding element of a deflection shaft 17 held at its upper end.
  • the individual melt streams are led back in a loop with a length of 2,000 to 10,000 times their diameter back to the tub 7, from where they are via the deflecting shafts 18 and 19 out of the cooling water bath as solidified threads or strands for further processing be performed.
  • the hollow cylinder 15 with the deflection shaft 17 can be displaced along the tube axis with the aid of a cable winch 21 engaging a bracket 20 of the hollow cylinder, so that the length of the loop in the tube 13 and thus the length of the cooling section can be adjusted.
  • This adjustability to adapt to the respective process parameters enables an optimal cooling section for the melt threads. It is important because the temperature of the solidified melt threads determines the quality of the product during further processing, for example the quality of the cut when processing into granules. Due to its toughness, a thread or strand that is cooled too far often leads to protrusions referred to as “tails”, which lead to undesired dust formation when subsequently conveyed pneumatically. Furthermore, the energy consumption for cutting and knife wear are increased. If the thread is not cooled enough, the individual granules can stick together and form curved chains that can clog the delivery line.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Fäden aus synthetischen Stoffen gemäß Oberbegriff des Patentanspruchs 1. Ferner betrifft die Erfindung eine Vorrichtung zur Durchführung des Verfahrens gemäß Oberbegriff des Patentanspruchs 3.The invention relates to a method for producing threads from synthetic materials. The invention further relates to a device for carrying out the method according to the preamble of claim 3.

Bisher wurde eine Schmelze aus synthetischen Stoffen wie Polyamid, Polyester, Polyethylenterephthalat, Polybutylenterephthalat, Polystyrol über Düsenöffnungen einer Düsenplatte in ein Kühlwasserbad eingeleitet, durch welches die einzelnen Schmelzeströme bis zur gewünschten Festigkeit in einer im wesentlichen waagrechten Kühlstrecke geführt wurden. Die zu wählende Länge der Kühlstrecke hängt in der Hauptsache von vier Parametern ab: Durchmesser der einzelnen Schmelzeströme, ihre Fließgeschwindigkeit, Zusätze in der Schmelze und Kühlwassertemperatur. Die dafür gebräuchlichen Kühlwannen haben in der Praxis dementsprechend Längen von 10 bis 15 m. Neben diesem großen Platzbedarf ist dabei von Nachteil, daß die Länge der Kühlstrecke im Hinblick auf sich ändernde Parameter nicht variierbar ist.So far, a melt made of synthetic materials such as polyamide, polyester, polyethylene terephthalate, polybutylene terephthalate, polystyrene has been introduced into a cooling water bath through the nozzle openings of a nozzle plate, through which the individual melt streams have been guided in an essentially horizontal cooling section to the desired strength. The length of the cooling section to be selected mainly depends on four parameters: diameter of the individual melt streams, their flow rate, additives in the melt and cooling water temperature. In practice, the cooling troughs used for this purpose have lengths of 10 to 15 m. In addition to this large space requirement, it is disadvantageous that the length of the cooling section cannot be varied with regard to changing parameters.

Es stellte sich daher die Aufgabe, ein Verfahren und eine Vorrichtung zur Herstellung von Fäden aus synthetischen Stoffen zu entwickeln, bei denen die Länge der Kühlstrecke zur Anpassung an sich ändernde Parameter einstellbar ist. Dabei soll die bisherige Länge der Kühlwanne wesentlich reduziert sein.It was therefore the task of developing a method and a device for producing threads from synthetic materials, in which the length of the cooling section can be adjusted to adapt to changing parameters. The previous length of the cooling trough should be significantly reduced.

Die Aufgabe wurde durch ein Verfahren und eine Vorrichtung gelöst, wie sie in den Patentansprüchen gekennzeichnet sind.The object was achieved by a method and a device as characterized in the claims.

Weitere Einzelheiten und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung in Verbindung mit der Zeichnung, die schematisch eine Vorrichtung zur Ausführung des Verfahrens wiedergibt.Further details and features of the invention emerge from the following description in conjunction with the drawing, which schematically shows an apparatus for carrying out the method.

Die Schmelze aus synthetischem Stoff wird mit Hilfe einer Pumpe, beispielsweise einer Zahnradpumpe, über eine Zuführung 1 in einen mit einem Heizmantel 2 versehenen Behälter 3 geleitet und anschließend durch die Düsenöffnungen 4 einer Düsenplatte 5 getrieben, so daß als Fäden anzusehende einzelne Schmelzeströme 6 entstehen. Diese gelangen daran anschließend in eine Wanne 7, in der sie zu Abschreckung mittels einer ersten Umlenkwelle 8 gegen einen Kühlwasserstrom zwischen einem Zulauf 9 und einem Ablauf 10 in einer Tiefe des bis zum 300-fachen ihres Durchmessers geführt werden. Die Länge dieser im wesentlichen waagrecht verlaufenden Kühlstrecke ist bei einer Transportgeschwindigkeit der Schmelzströme von 50 bis 150 Meter pro Minute auf das 500 bis 1500-fache des Durchmessers eines einzelnen Schmelzestromes bemessen.The melt of synthetic material is passed with the aid of a pump, for example a gear pump, via a feed 1 into a container 3 provided with a heating jacket 2 and then driven through the nozzle openings 4 of a nozzle plate 5, so that individual melt streams 6 which are to be regarded as threads are formed. These then pass into a trough 7, in which they are guided to a quench by means of a first deflecting shaft 8 against a cooling water flow between an inlet 9 and an outlet 10 at a depth of up to 300 times their diameter. The length of this essentially horizontal cooling section is dimensioned at a transport speed of the melt streams of 50 to 150 meters per minute to 500 to 1500 times the diameter of a single melt stream.

Nachdem die Schmelzeströme auf dieser Kühlstrecke soweit abgeschreckt worden sind, daß ihre Oberflächenfestigkeit ausreicht, das Eigengewicht des senkrecht hängenden Schmelzestromes und eine Zugkraft P aufzunehmen, werden sie mittels einer zweiten Umlenkwelle 11 über eine Öffnung 12 im Boden der Wanne in ein sich daran anschließendes, im wesentlichen vertikal angeordnetes Rohr 13 gelenkt, dessen Länge im praktischen Betrieb etwa das 4- bis 6-fache des Abstandes zwischen dem Mittelpunkt der Öffnung des Wannenbodens und der Düsenplatte beträgt. Im Rohr, das an seinem unteren Ende abgeschlossen ist und ebenfalls einen Zulauf 14 für Kühlwasser aufweist, ist ein Hohlzylinder 15 auf Schienen 16 gleitbar angeordnet, der als Halte- und Führungselement einer an dessen oberem Ende gehaltenen Umlenkwelle 17 dient.After the melt streams on this cooling section have been quenched to such an extent that their surface strength is sufficient to absorb the weight of the vertically hanging melt stream and a tensile force P, they are by means of a second deflecting shaft 11 through an opening 12 in the bottom of the tub in a subsequent, in steered substantially vertically arranged tube 13, the length of which in practical operation is approximately 4 to 6 times the distance between the center of the opening of the tub base and the nozzle plate. In the tube, which is closed at its lower end and also has an inlet 14 for cooling water, a hollow cylinder 15 is slidably arranged on rails 16, which serves as a holding and guiding element of a deflection shaft 17 held at its upper end.

Um diese Umlenkwelle werden die einzelnen Schmelzeströme in einer Schleife einer Länge vom 2000- bis 10000-fachen ihres Durchmessers wieder zurück zur Wanne 7 geführt, von wo sie über die Umlenkwellen 18 und 19 aus dem Kühlwasserbad heraus als fertig verfestigte Fäden oder Stränge zu einer Weiterverarbeitung geführt werden.Around this deflecting shaft, the individual melt streams are led back in a loop with a length of 2,000 to 10,000 times their diameter back to the tub 7, from where they are via the deflecting shafts 18 and 19 out of the cooling water bath as solidified threads or strands for further processing be performed.

Der Hohlzylinder 15 mit der Umlenkwelle 17 ist mit Hilfe einer an einem Bügel 20 des Hohlzylinders angreifenden Seilwinde 21 entlang der Rohrachse verschiebbar, so daß die Länge der Schleife im Rohr 13 und damit die Länge der Kühlstrecke einstellbar ist. Diese Einstellbarkeit zur Anpassung an die jeweiligen Verfahrensparameter ermöglicht eine optimale Kühlstrecke für die Schmelzefäden. Sie ist von Bedeutung, da die Temperatur der erstarrten Schmelzefäden bei der Weiterverarbeitung die Qualität des Produkts, beispielsweise bei der Verarbeitung zu Granulat die Qualität des Schnittes bestimmt. Ein zu weit gekühlter Faden oder Strang führt wegen seiner Zähigkeit häufig zu als "Schwänze" bezeichneten Überständen, die bei einer anschließenden pneumatischen Förderung zu unerwünschter Staubbildung führen. Ferner sind dabei der Energieverbrauch zum Schneiden sowie der Messerverschleiß erhöht. Bei zu wenig gekühltem Faden können die einzelnen Granulatkörner aneinander hängen bleiben und dabei gekrümmte Ketten bilden, die die Förderleitung verstopfen können.The hollow cylinder 15 with the deflection shaft 17 can be displaced along the tube axis with the aid of a cable winch 21 engaging a bracket 20 of the hollow cylinder, so that the length of the loop in the tube 13 and thus the length of the cooling section can be adjusted. This adjustability to adapt to the respective process parameters enables an optimal cooling section for the melt threads. It is important because the temperature of the solidified melt threads determines the quality of the product during further processing, for example the quality of the cut when processing into granules. Due to its toughness, a thread or strand that is cooled too far often leads to protrusions referred to as “tails”, which lead to undesired dust formation when subsequently conveyed pneumatically. Furthermore, the energy consumption for cutting and knife wear are increased. If the thread is not cooled enough, the individual granules can stick together and form curved chains that can clog the delivery line.

Claims (7)

1. A process for the production of strands of synthetic materials, in which the viscous melt flows through die orifices, and the resulting individual strands, to be regarded as filaments, are led in counter-current to a stream of cooling water, in order to solidify them, and are then led to a further processing stage, wherein the individual melt strands are first led along a short, essentially horizontal path for minimum solidification and thereafter are led in an essentially vertical loop of variable length through a cooling water bath for complete solidification.
2. A process as claimed in claim 1, wherein the individual melt strands are led through a bath of cooling water, at a speed of travel of from 50 to 150 meters per minute, essentially horizontally over a length of from 500 to 1,500 times their diameter and thereafter essentially vertically in a loop having a length of from 2,000 to 10,000 times their diameter.
3. An apparatus for carrying out the process as claimed in claims 1 and 2, comprising a vessel (3), which has a heating jacket (2) and a melt feed (1), and is closed at the bottom by a plate (5) with die orifices (4), and a short trough (7), connected below the die orifices, with guide rollers (8, 11, 18, 19) for leading the melt strands (6) into and out of the trough, the trough being provided with a cooling water outlet (10) at the die plate end and an inlet (9) at the opposite end, wherein the bottom of the trough has, at a distance from the die plate (5) adequate for initial surface solidifcation of the melt strands (6), an orifice (12) which merges into an essentially vertical pipe (13), closed at its lower end, in which a direction-reversing roller (17), attached to a holding and guiding element (15), is located in a height- adjustable manner.
4. An apparatus as claimed in claim 3, wherein the length of the pipe (13) is equal to from 4 to 6 times the distance between the center point of the orifice (12) of the trough bottom and the die plate (5).
5. An apparatus as claimed in claims 3 and 4, wherein the holding and guiding element is a hollow cylinder (15) sliding on rails (16), the direction-reversing roller (17) being held at the upper end of the element, while a device for adjusting its height engages above it.
6. An apparatus as claimed in claim 3 or 4 or 5, wherein the device for the height adjustment of the holding and guiding element (15) is a lifting hoist (21).
7. An apparatus as claimed in claim 3 or 4 or 5 or 6, wherein the pipe (13) is equipped with a cooling water inlet (14) at its bottom end.
EP83101131A 1982-02-17 1983-02-07 Process and device for the preparation of synthetic fibres Expired EP0086426B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3205645 1982-02-17
DE19823205645 DE3205645A1 (en) 1982-02-17 1982-02-17 METHOD AND DEVICE FOR PRODUCING PLASTIC THREADS

Publications (3)

Publication Number Publication Date
EP0086426A2 EP0086426A2 (en) 1983-08-24
EP0086426A3 EP0086426A3 (en) 1985-12-11
EP0086426B1 true EP0086426B1 (en) 1988-02-03

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ID=6155964

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Application Number Title Priority Date Filing Date
EP83101131A Expired EP0086426B1 (en) 1982-02-17 1983-02-07 Process and device for the preparation of synthetic fibres

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US (1) US4446089A (en)
EP (1) EP0086426B1 (en)
JP (1) JPS58144107A (en)
DE (2) DE3205645A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATA239194A (en) * 1994-12-22 1996-02-15 Chemiefaser Lenzing Ag DEVICE FOR CARRYING OUT A DRY / WET SPINNING PROCESS
US5984655A (en) * 1994-12-22 1999-11-16 Lenzing Aktiengesellschaft Spinning process and apparatus
US5741529A (en) * 1996-07-31 1998-04-21 Alfacel S.A. Adjustable reaction tubs for cellulose
JP3061182B2 (en) * 1998-12-16 2000-07-10 ユニプラス滋賀株式会社 Method and apparatus for producing monofilament crimped yarn
US6991445B2 (en) * 2003-02-21 2006-01-31 K-Ter Imagineering, Inc. Siding production line cooling apparatus and method
DE102010007497A1 (en) * 2010-02-09 2011-08-11 Thüringisches Institut für Textil- und Kunststoff-Forschung e.V., 07407 Heat-storing moldings
CN105603550B (en) * 2016-01-30 2017-11-10 河南省龙都生物科技有限公司 Bamboo charcoal PLA blend melt direct fabrics system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875019A (en) * 1956-01-17 1959-02-24 Firestone Tire & Rubber Co Method for producing crimped filaments
US3066366A (en) * 1960-12-08 1962-12-04 American Viscose Corp Binding device
NL264878A (en) * 1961-05-17
US3199148A (en) * 1962-04-20 1965-08-10 Avisun Corp Film quenching apparatus
US3491177A (en) * 1967-03-31 1970-01-20 Du Pont Evaporative cooling of polymer composition
DE1916222B1 (en) * 1969-03-29 1970-11-05 Scheer & Cie C F Device for cooling extruded plastic strands, primarily with a subsequent granulator
US3890074A (en) * 1972-04-22 1975-06-17 Rudolf Paul Fritsch Extrusion and cooling plant for plastics strands
US4321230A (en) * 1980-06-05 1982-03-23 Mobil Oil Corporation Process for recovering film from pressurized extrusion zone

Also Published As

Publication number Publication date
EP0086426A3 (en) 1985-12-11
US4446089A (en) 1984-05-01
DE3375591D1 (en) 1988-03-10
JPH0246686B2 (en) 1990-10-17
EP0086426A2 (en) 1983-08-24
DE3205645A1 (en) 1983-08-25
JPS58144107A (en) 1983-08-27

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