EP0527134B1 - Dispositif pour le refroidissement de filaments files par fusion - Google Patents

Dispositif pour le refroidissement de filaments files par fusion Download PDF

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Publication number
EP0527134B1
EP0527134B1 EP91904645A EP91904645A EP0527134B1 EP 0527134 B1 EP0527134 B1 EP 0527134B1 EP 91904645 A EP91904645 A EP 91904645A EP 91904645 A EP91904645 A EP 91904645A EP 0527134 B1 EP0527134 B1 EP 0527134B1
Authority
EP
European Patent Office
Prior art keywords
tube
filaments
preparation
filament
melt
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 - Lifetime
Application number
EP91904645A
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German (de)
English (en)
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EP0527134A1 (fr
Inventor
Hans Linz
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.)
Uhde Inventa Fischer AG
Original Assignee
EMS Inventa AG
Inventa AG fuer Forschung und Patentverwertung
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Publication date
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Publication of EP0527134A1 publication Critical patent/EP0527134A1/fr
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Publication of EP0527134B1 publication Critical patent/EP0527134B1/fr
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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

Definitions

  • the present invention relates to a device for cooling, stabilizing and preparing melt-spun filaments, consisting of a blow candle arranged in the center of an annular filament bundle and a preparation device as is known from US Pat. No. 4,288,207.
  • porous blow candle which is inserted from below into the center of an annular bundle of fibrils and which passes through the fibril bundle with a gas stream in a radially symmetrical manner from the inside to the outside, CH-A-667676.
  • the requirements for the regularity of an endless multifilament are so high that, e.g. in the case of filaments made of polyethylene terephthalate, the value range for the optical birefringence should not be wider than 10% of the mean found.
  • the value range for the optical birefringence should not be wider than 10% of the mean found.
  • the object of the present invention is to cool and solidify a melt-spun multifilament in such a way that the molecular orientation within the individual filaments is uniform.
  • Another task lies in larger melt throughputs per fibril, or higher speeds, which is of particular interest for use in the production of continuous filaments.
  • a closed tube is arranged between the blow candle and the preparation device and has a length of 200 to 2000 mm.
  • the distance between the blow candle and the application device for the preparation agent is increased.
  • This has the advantage of cooling a melt-spun filament a longer period of time is available. This is all the more important the thicker the individual filaments and the higher the spinning take-off speed. It is therefore expedient that the location at which the freshly spun filament comes into mechanical contact with a thread guide member of any kind is located further from the spinneret, the larger the filament titer or the higher the take-off speed.
  • the titer that the filament has during the cooling phase is of importance here.
  • the distance between the start of the blowing and the location of the preparation order is at least 950 mm. Since the application device itself protrudes 220 mm beyond the point at which the preparation is actually applied, it is expedient to provide a tube of at least 200 mm in length between the blow candle and the preparation device.
  • the tube is surrounded by a conical jacket.
  • the cooling air is conducted quantitatively, continuously and without turbulence from the inside of the cylindrical fibril bundle to the outside.
  • the length of this tube should be between 200 and 2000 mm, in particular between 200 and 1780 mm, preferably between 200 and 1160 mm.
  • Coarser filament titers and higher spinning speeds require larger distances between the blow candle and the location of the preparation job than shorter distances. The same applies to substances with a higher heat content. This may lead to tube lengths at which the mechanical stabilization of the cylindrical fibril bundle becomes problematic. It is known to be a free bundle of fibrils The longer it is disturbed by external air influences.
  • the cooling conditions require certain minimum lengths
  • suitable measures must be taken to ensure that the disruptive influence of external air currents is eliminated or at least reduced to the required extent. It is therefore expedient to surround the blowing device with a stationary jacket, which in a preferred embodiment consists of a cylindrical perforated plate. This jacket extends from the lower edge of the spinneret pack or heating collar, if present, to the area of the preparation device. A defined distance from the spinneret package or heating collar or from the preparation device can be provided both at the upper and at the lower end of this jacket in order to create the possibility of a controlled air exchange with the surroundings.
  • the jacket is expediently designed so that both a part of it can be opened to the rear and a part to the front.
  • the former is necessary in order to enable the blow-on candle to travel the required distance that the device travels when it exits the operating position.
  • the latter is used to open the spinning shaft for the operating personnel, e.g. in the case of spinning the thread down from the spinning stick into the space below with the take-off device.
  • the product consists of the spinning speed v (in m / min) and the square root of the filament titer (in dtex) is between 5000 and 20,000, preferably between 5270 and 11,000.
  • melt-spun filaments are given sufficient time to cool down before they come into mechanical contact with the application device for the spin preparation.
  • the reference numeral 1 denotes a spinneret pack, which is arranged within a heating collar 2.
  • the spinneret pack and the heating collar 2 are surrounded by insulation 15.
  • a porous blow candle 4 is gas-tightly connected to a tube 5 of approximately the same diameter which is closed over its entire length.
  • annular preparation device 6 is arranged concentrically, which is used to apply a spin preparation to a filament bundle 3.
  • the blow candle 4, the closed tube 5 and the preparation device 6 are carried by a tube cone 9, which in turn is movably connected to the building in a manner not shown via a narrow connecting channel 10 and a further closed tube 11.
  • the entire device is arranged to be completely movable out of the thread path.
  • a mandrel 12 At the upper end of the blow candle 4 is a mandrel 12, which in the operating position of the device in a corresponding bore 13 in the center of the Spinneret pack 1 engages.
  • a spinning tube 8 At the upper end of which a convergence device 7 is attached.
  • the blow candle 4, the closed tube 5 and the preparation device 6 are surrounded by a jacket 14, which in a preferred embodiment is formed from a perforated plate.
  • the tube 5 can be surrounded by a conical jacket 16.
  • the blow candle 4 can, as far as this is technically possible, be positioned up to the immediate vicinity of the spinneret plate. Furthermore, for the purpose of controlled air exchange with the surroundings, a defined distance from the spinneret plate or heating collar or from the preparation device can be provided both at the upper and at the lower end of the jacket 14.
  • the blow candle 4 is supplied with the required cooling air via the pipeline 11, the connecting channel 10, the pipe cone 9, the preparation device 6 and the pipe 5, which air escapes radially symmetrically from the porous surface of the blow candle 4.
  • the preparation device 6 is supplied with the corresponding preparation via a line, not shown, which is laid within the tube 11, the connecting channel 10 and the tube cone 9.
  • the polymer melt to be spun is discharged in a known manner through spinneret bores arranged on concentric circles. It first passes in a free fall the heating collar zone 2 and then reaches the area of the blow candle 4, where it is cooled by the cooling air escaping and solidified into filaments 3.
  • the filaments 3 After passing a further distance defined by the closed tube 5, the filaments 3 are provided with a spin preparation by means of the preparation device 6. Then the individual filaments with the help of the convergence thread guide 7, conically combined into a closed filament bundle 3 'and fed through the spinning tube 8 to the thread take-off device, also not shown.
  • the emerging melt was cooled with the central blowing according to the invention using 600 cbm / h of air at 35 ° C.
  • the blow candle 4 was 530 mm long with a diameter of 95 mm.
  • the closed tube 5 between the blow candle 4 and the applicator 6 for the preparation was 200 mm long. As a result, the place for the application of the preparation was 420 mm below the blow candle.
  • the consolidated multifilament was withdrawn from the spinning shaft at a speed of 3100 m / min.
  • the melt throughput was chosen so that the individual filaments had a titer of 3.6 dtex.
  • the optical birefringence values measured on this multifilament were in the range between 0.048 and 0.053. The molecular orientation of the multifilament was therefore sufficiently regular that good further processing was possible.
  • Polyethylene terephthalate as in Example 1 was spun and cooled in the same manner.
  • the length of the tube 5 was 1160 mm, i.e. the application device for the spin preparation 6 was 1380 mm below the blow candle.
  • the melt throughput per spinneret bore was varied in such a way that multifilaments resulted with a take-off speed of 3100 m / min, the individual fibril titer of which was between 4.5 and 11.5 dtex. With these multifilaments, too, the values for the optical birefringence were within a narrow range of 0.006 units.
  • Polyethylene terephthalate was spun as in Example 1 and cooled and solidified under the same conditions.
  • the length of the tube 5 was 200 mm.
  • the take-off speed was 2000 m / min.
  • the melt throughput was chosen so that a multifilament with 8.5 dtex single fibril titer resulted.
  • the optical birefringence values found on these filaments were within a range between 0.024 and 0.045.
  • Polyethylene terephthalate was spun, cooled and solidified as in Example 1. However, a multifilament with 5.6 dtex single fibril titer was produced at 3100 m / min. Optical birefringence values were found which were within a range from 0.048 to 0.110.
  • Threads according to Examples 1-4 can be processed well, in particular drawn. With the threads according to Examples 5 and 6, an intolerable number of filament breaks occur during stretching.
  • thermoplastic polymers in particular with polyesters such as polyethylene terephthalate, polyamides such as polycaprolactam, polyhexamethylene adipic acid amide and similar polyamides, polyethylene, polypropylene and their relatives, polyacrylonitrile etc. used in the textile sector the invention on other polymer pipe lengths up to 2000 mm may be required.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

Dans un dispositif pour le refroidissement de filaments par soufflage central au moyen d'une bougie de soufflage (4), un tube fermé (5) d'une longueur de 200 à 2000 mm est disposé entre la bougie de soufflage (4) et le système de préparation (6). Grâce à la disposition selon l'invention, les fibrilles sont refroidies à tel point que l'orientation moléculaire dans les différents filaments est uniforme et qu'il en résulte un filament très régulier.

Claims (4)

  1. Dispositif pour refroidir, stabiliser et traiter des filaments filés à chaud, comprenant une tête de soufflage (4) disposée au centre d'un faisceau de filaments (3) en forme d'anneau et un dispositif de traitement (6), caractérisé par le fait qu'un tube (5) fermé est disposé entre la tête de soufflage (4) et le dispositif de traitement (6), lequel tube a une longueur comprise entre 200 et 2000 mm.
  2. Dispositif selon la revendication 1, caractérisé par le fait que le tube (5) est entouré par une enveloppe (16) en formede cône.
  3. Dispositif selon la revendication 1 ou la revendication 2, caractérisé par le fait que la tête de soufflage (4), le tube (5) et le dispositif de traitement (6) sont entourés d'une enveloppe cylindrique constituée d'une tôle perforée (14).
  4. Procédé de refroidissement faisant usage du dispositif selon les revendications 1 à 3, caractérisé par le fait que le produit de la vitesse de tirage v et de la racine carrée du titre du filament est compris entre 5 000 et 20 000 (m/min * dtex1/2).
EP91904645A 1991-03-04 1991-03-04 Dispositif pour le refroidissement de filaments files par fusion Expired - Lifetime EP0527134B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH1991/000050 WO1992015732A1 (fr) 1991-03-04 1991-03-04 Dispositif pour le refroidissement de filaments files par fusion

Publications (2)

Publication Number Publication Date
EP0527134A1 EP0527134A1 (fr) 1993-02-17
EP0527134B1 true EP0527134B1 (fr) 1995-05-17

Family

ID=4547207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91904645A Expired - Lifetime EP0527134B1 (fr) 1991-03-04 1991-03-04 Dispositif pour le refroidissement de filaments files par fusion

Country Status (7)

Country Link
EP (1) EP0527134B1 (fr)
JP (1) JP2809878B2 (fr)
BR (1) BR9106417A (fr)
CH (1) CH678433A5 (fr)
DE (1) DE59105531D1 (fr)
ES (1) ES2075430T3 (fr)
WO (1) WO1992015732A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5536157A (en) * 1991-03-04 1996-07-16 Ems-Inventa Ag.G. Apparatus for cooling melt-spun filaments
DE19653451C2 (de) * 1996-12-20 1998-11-26 Inventa Ag Verfahren zur Herstellung eines Polyester-Multifilamentgarnes
DE19800636C1 (de) * 1998-01-09 1999-07-29 Inventa Ag Vorrichtung zum Abkühlen und Präparieren von schmelzgesponnenen Fäden
DE19821778B4 (de) * 1998-05-14 2004-05-06 Ems-Inventa Ag Vorrichtung und Verfahren zur Herstellung von Mikrofilamenten von hoher Titer-Gleichmäßigkeit aus thermoplastischen Polymeren
DE59910294D1 (de) 1998-06-22 2004-09-23 Saurer Gmbh & Co Kg Spinnvorrichtung zum spinnen eines synthetischen fadens
US6288157B1 (en) 1999-05-11 2001-09-11 3M Innovative Properties Company Alkylated fluorochemical oligomers and use thereof
US6525127B1 (en) 1999-05-11 2003-02-25 3M Innovative Properties Company Alkylated fluorochemical oligomers and use thereof in the treatment of fibrous substrates
DE10105440A1 (de) * 2001-02-07 2002-08-08 Neumag Gmbh & Co Kg Vorrichtung zum Schmelzspinnen und Kühlen einer Filamentschar
EP1491663A1 (fr) * 2003-06-23 2004-12-29 Nan Ya Plastics Corporation Procédé pour la production de multifilaments en polyester ayant un faible denier et fils multifilaments en polyester ayant un faible denier
JP4760441B2 (ja) * 2006-02-23 2011-08-31 東レ株式会社 溶融紡糸装置および溶融紡糸方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL271547A (fr) * 1960-11-18
GB957534A (en) * 1962-01-18 1964-05-06 British Nylon Spinners Ltd Improvements in or relating to melt-spinning synthetic polymer filaments
US4288207A (en) * 1980-06-30 1981-09-08 Fiber Industries, Inc. Apparatus for producing melt-spun filaments
JPS56169805A (en) * 1980-05-30 1981-12-26 Toray Ind Inc Melt spinning method
CH667676A5 (de) * 1985-09-18 1988-10-31 Inventa Ag Vorrichtung zum abkuehlen und praeparieren von schmelzgesponnenem spinngut.
DE3822571A1 (de) * 1988-07-04 1990-02-01 Hoechst Ag Spinnverfahren und vorrichtung zur durchfuehrung desselben

Also Published As

Publication number Publication date
WO1992015732A1 (fr) 1992-09-17
DE59105531D1 (de) 1995-06-22
EP0527134A1 (fr) 1993-02-17
JPH05505427A (ja) 1993-08-12
CH678433A5 (fr) 1991-09-13
JP2809878B2 (ja) 1998-10-15
BR9106417A (pt) 1993-05-04
ES2075430T3 (es) 1995-10-01

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