EP0372014B1 - Procede et dispositif de fabrication de fils a filaments de polyester amorphes a orientation haute - Google Patents

Procede et dispositif de fabrication de fils a filaments de polyester amorphes a orientation haute Download PDF

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Publication number
EP0372014B1
EP0372014B1 EP89902220A EP89902220A EP0372014B1 EP 0372014 B1 EP0372014 B1 EP 0372014B1 EP 89902220 A EP89902220 A EP 89902220A EP 89902220 A EP89902220 A EP 89902220A EP 0372014 B1 EP0372014 B1 EP 0372014B1
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EP
European Patent Office
Prior art keywords
cooling
contact surface
filament yarns
spinneret
roller
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
EP89902220A
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German (de)
English (en)
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EP0372014A1 (fr
Inventor
Klaus Fischer
Halim Baris
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
Publication of EP0372014A1 publication Critical patent/EP0372014A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters

Definitions

  • the invention relates to a method for producing highly oriented, amorphous polyester filament threads by melt spinning at take-off speeds> 4000 m / min and polyester filament threads produced by the method and a device for carrying out the method.
  • EP-A-0 089 819 describes shock cooling using water.
  • a polyethylene terephthalate filament thread is quenched at least 5000 m / min in a water bath. With high orientation, the resulting thread has only a low crystallinity, demonstrated by a boiling shrinkage of at least 45% and at most 68.5%.
  • EP-A-0 244 216 describes a polyester filament yarn which is spun at more than 5000 m / min in an overpressure chamber, at the outlet of which a narrow tube is attached, the venturi effect causing shock cooling.
  • air cooling As the number of filaments increases, uniform cooling of the bundled filament bundle in the cooling tube (Venturi) is no longer guaranteed.
  • shock cooling with air means that no defined thread speed is possible in the area below the spinneret, especially where the molten material is most sensitive.
  • the object of the invention is to provide a method for flash cooling a rapidly spun polyethylene terephthalate filament thread, which ensures a defined thread speed in the area between the spinneret and the cooling element.
  • Another object is to provide a device for carrying out the method mentioned.
  • Yet another object is to provide a polyester filament thread with a high birefringence and a relatively high cooking shrinkage as a feed yarn.
  • the solution to the problem lies in a method which is characterized in that the melt-spun filament threads are cooled by means of a circumferential contact surface, then spin-prepared and wound up.
  • a circumferential contact surface has the advantage that work can be carried out under defined conditions without a liquid or gaseous medium. Regardless of this, the cooling rate can be determined by specifying the distance of the cooling surface from the spinneret and the wrap angle of the thread on the cooling surface.
  • a variety of yarn properties can be achieved by varying the two parameters alone.
  • the contact times of the filament threads on the contact surface between 1x10 ⁇ 3 and 1x10 ⁇ 2 s, in particular 2x10 ⁇ 3 - 1x10 ⁇ 2 s, determined with a peripheral speed range of the contact surface between 800 to 2400 m / min, especially between 1600 to 2400 m / min.
  • the contact length or the wrap angle of the filament thread can also be calculated from the time.
  • the polyester thread produced by the process surprisingly has an undeformed, circular cross section without adhesions.
  • a peripheral contact surface has proven to be suitable as a cooling element as a device for carrying out the method.
  • a rotating contact surface has the advantage that a larger number of individual filaments can be cooled than is possible with known shock cooling processes. So it is easily possible to cool 30 and more filaments at the same time.
  • the desired properties of the shrinking yarn (> 40% KS, in particular 40-70% KS) can be adjusted in a particularly simple manner by varying the distance from the spinneret and the speed of rotation of the contact surface.
  • the contact surface is designed as a cooling roller.
  • the cooling roller is preferably a hollow body made of a good heat-conducting material and can be provided with additional connections for a heat transport medium or coolant. Such a roller ensures almost any heat dissipation of the polyester filament threads.
  • a cooling belt is also suitable for shock cooling polyester filament threads.
  • the contact surface expediently consists of a highly thermally conductive material, preferably a metal or an alloy. Copper, aluminum and their alloys are particularly suitable.
  • the thickness of the metal layer is 2-100 mm, preferably 10-80 mm, in particular 40-60 mm.
  • the distance of the chill roll from the spinneret is 250-1500 mm, depending on the filament and total titer.
  • FIG. 2 the arrangement shown in FIG. 1 is shown rotated by 90 °.
  • connections 11 for a heat transport medium are specified.
  • the course of the individual filaments up to the point of convergence 6 should be shown clearly from the illustration.
  • the number of filament threads 2 is largely uncritical.
  • a cooling belt 10 is shown, which is guided over rollers 9, 9 'and 9''and at least one of these rollers is driven by a motor, not shown.
  • the filament thread bundle 2 meets the cooling belt 10 in the area of the roll 9 and leaves the cooling belt 10 in the area of the roll 9 'as a total thread 5 in the direction of the winder 8, not shown.
  • a Polrester filament thread bundle 2 emerging from the spinneret 1 strikes the surface of the cooling roller 3, where it undergoes shock cooling during its contact with the roller surface.
  • the cooling roller rotates at a peripheral speed of 1600 to 2400 m / min.
  • the thread is fed over the deflection roller 4 and over the convergence point 6 to the winder 8 at a winding speed of at least 4000 m / min. Any stretching is determined by the difference between the winder speed and that of the cooling roll 3.
  • the effect of the cooling roller can be enhanced by heat dissipation using a coolant.
  • a standard polyester polymer with an intrinsic viscosity of 0.75 dl / g was galettlos with a constant winding speed of 5000 m / min to the two titers dtex 67 f 12 and 200 f 30 (nom. 55 dtex f 12 and 167 f 30) spun.
  • the boiling shrinkage is given.
  • the boiling shrinkage was determined by measuring the length before and after heat treatment in water [KS measurement: individual thread 50 cm long (unshrunk); at 98 ° C ⁇ 1 ° C in water for 2.5 minutes; Average of 3 measurements].
  • KS measurement individual thread 50 cm long (unshrunk); at 98 ° C ⁇ 1 ° C in water for 2.5 minutes; Average of 3 measurements.
  • the value of the shrinkage can be viewed as a measure of the crystallinity, verified by measuring the density of the threads.
  • the optimal distance between spinneret and roller was determined for the respective spinning titer and its desired properties.
  • the spinning result can be influenced by the distance between the spinneret / roller, the peripheral speed of the roller and the contact length of the thread / roller (corresponds to the cooling time).
  • the cooking shrinkage is mainly influenced by the distance between the spinneret and the roller, while the orientation shows no clear tendency.
  • Table 1 It can be seen from Table 1 that, as the distance between the KS increases, it initially drops slightly, when a limit value is reached, in the described case about 55-60 cm, suddenly drops very sharply.
  • the contact and thus the cooling time can be varied through the variable wrap angle of the thread on the roller circumference. This parameter also essentially influences the KS of the spun yarns. If the cooling time, ie the contact length, is shortened, the same dependencies on the distance between the spinneret and the roller tend to be shown in Table 2, only at a lower level.
  • the orientation of the spun thread can be adjusted within certain limits via the roller speed.
  • Table 3 shows, the cooking shrinkage increases at the same time as the speed increases, strongly below 2000 m / min, and only above easy, with opposite tendency of orientation (birefringence).
  • a particular advantage of the method according to the invention is seen in the fact that, in contrast to the known cooling methods with water or air, the yarn properties can be influenced in a targeted manner.
  • the method according to the invention works more economically, since neither a system for cooling air and its complex operation nor precautions for occurring contamination by splash water have to be taken in wet operation.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)

Abstract

Selon un procédé de fabrication de fils (2) à filaments de polyester amorphes à orientation haute et à filage rapide, le refroidissement par choc thermique se fait au moyen d'une surface rotative de refroidissement formée, dans un dispositif préférentiel, par la surface de contact d'un cylindre de refroidissement (3). On peut obtenir des fils à filaments ayant un rétrécissement voulu à l'ébullition jusqu'à 70% et une biréfringence DELTAn > 0,08 en modifiant la durée du contact entre les fils à filaments (2) et le cylindre de refroidissement (3) et/ou l'écart entre la filière (1) et le cylindre de refroidissement (3).

Claims (11)

  1. Procédé pour la fabrication dans la masse fondue de fils polyester amorphes hautement orientés avec des vitesses de filage > 4000 m/min, caractérisé en ce que les fils (2) filés dans la masse fondue sont refroidis au moyen d'une surface de contact tournante et par la suite, ils sont ensimés avec la préparation de filage et bobinés.
  2. Procédé selon la revendication 1, caractérisé en ce que les filaments filés (2) touchent la surface de contact pendant 1 x 10⁻³ jusqu' à 1 x 10⁻² s.
  3. Fils de polyester, fabriqués d'après le procédé selon les revendications 1 et 2, caractérisé par une biréfringence Δn > 0,08 et par un rétrécissement dans l'eau bouillante à 98°C ± 1°C pendant 2,5 minutes > 40 % par rapport à la longueur du fil non rétréci.
  4. Dispositif pour l'application du procédé selon la revendication 1, caractérisé en ce que la surface de contact est positionée entre une filère (1) et un bobinoir (8).
  5. Dispositif selon la revendication (4), caractérisé en ce que la surface de contact tournante est un cylindre de refroidissement (3) rotatif.
  6. Dispositif selon la revendication 4, caractérisé en ce que la surface de contact tournante est une bande de refroidissement (10).
  7. Dispositif selon les revendication 4 à 6, caractérisé en ce que la surface de contact est un métal.
  8. Dispositif selon la revendication 7, caractérisé en ce que la surface métallique est en cuivre ou est un alliage de cuivre.
  9. Dispositif selon les revendications 7 et 8 caractérisé en ce que l'épaisseur du métal comprend 2 à 100 mm.
  10. Dispositf selon les revendications 4 et 5, caractérisé en ce que le cylindre de refroidissement (3) soit positioné à une distance de 250 mm à 1500 mm de la filière (1).
  11. Dispositif selon les revendications 5 et 7 à 10, caractérisé en ce que le cylindre (3) a un corps creux comprenant des raccords (11) pour un médium de refroidissement.
EP89902220A 1988-02-26 1989-02-20 Procede et dispositif de fabrication de fils a filaments de polyester amorphes a orientation haute Expired - Lifetime EP0372014B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH72488 1988-02-26
CH724/88 1988-02-26
PCT/CH1989/000032 WO1989008159A1 (fr) 1988-02-26 1989-02-20 Procede et dispositif de fabrication de fils a filaments de polyester amorphes a orientation haute

Publications (2)

Publication Number Publication Date
EP0372014A1 EP0372014A1 (fr) 1990-06-13
EP0372014B1 true EP0372014B1 (fr) 1994-04-20

Family

ID=4193703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89902220A Expired - Lifetime EP0372014B1 (fr) 1988-02-26 1989-02-20 Procede et dispositif de fabrication de fils a filaments de polyester amorphes a orientation haute

Country Status (5)

Country Link
EP (1) EP0372014B1 (fr)
CA (1) CA1332263C (fr)
DE (1) DE58907506D1 (fr)
ES (1) ES2016875A6 (fr)
WO (1) WO1989008159A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0423278B2 (fr) * 1989-05-01 1998-04-15 Rhone-Poulenc Viscosuisse Sa Procede pour la fabrication de monofilaments fins
EP0408994A1 (fr) * 1989-07-10 1991-01-23 Rhône-Poulenc Viscosuisse SA Procédé pour la fabrication de fil non texturé

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425293A (en) * 1982-03-18 1984-01-10 E. I. Du Pont De Nemours And Company Preparation of amorphous ultra-high-speed-spun polyethylene terephthalate yarn for texturing
ES2019285B3 (es) * 1985-11-25 1991-06-16 Schweizerische Viscose Metodo y dispositivo para trenzado de hilos de poliester
US4687610A (en) * 1986-04-30 1987-08-18 E. I. Du Pont De Neumours And Company Low crystallinity polyester yarn produced at ultra high spinning speeds
DE3623748A1 (de) * 1986-07-14 1988-02-18 Groebe Anneliese Dr Schnellgesponnene polyethylenterephthalatfaeden mit neuartigem eigenschaftsprofil, verfahren zu ihrer herstellung und ihre verwendung

Also Published As

Publication number Publication date
WO1989008159A1 (fr) 1989-09-08
ES2016875A6 (es) 1990-12-01
EP0372014A1 (fr) 1990-06-13
DE58907506D1 (de) 1994-05-26
CA1332263C (fr) 1994-10-11

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