EP0063735B1 - Procédé pour la fabrication de fils de polyester texturés à partir de filaments de section non-ronde, et fils ainsi obtenus - Google Patents

Procédé pour la fabrication de fils de polyester texturés à partir de filaments de section non-ronde, et fils ainsi obtenus Download PDF

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Publication number
EP0063735B1
EP0063735B1 EP82103083A EP82103083A EP0063735B1 EP 0063735 B1 EP0063735 B1 EP 0063735B1 EP 82103083 A EP82103083 A EP 82103083A EP 82103083 A EP82103083 A EP 82103083A EP 0063735 B1 EP0063735 B1 EP 0063735B1
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EP
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Prior art keywords
yarns
texturing
yarn
filaments
profile
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Expired
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EP82103083A
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German (de)
English (en)
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EP0063735A2 (fr
EP0063735A3 (en
Inventor
Karl Heinrich
Norbert Heichlinger
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Hoechst AG
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Hoechst AG
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/0286—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist characterised by the use of certain filaments, fibres or yarns

Definitions

  • the present invention relates to a method for producing textured profile yarns, in which the profile has largely been preserved, by simultaneous stretching and false-wire texturing of pre-oriented polyester yarns, and the glitter yarns obtained thereby.
  • Glitter yarns are required for special fashionable effects.
  • textured yarns are now mainly produced by simultaneous stretch texturing of fast spinning yarns. With simultaneous stretch texturing, however, the tendency of the filaments typical of false-wire texturing increases, regardless of their initial cross section, to assume a more or less hexagonal cross section, such as the z. B. by Bigler in "Melliand Textile Reports" 1969, page 85 ff.
  • threads or yarns with a high degree of pre-orientation are understood to be those which have a birefringence of more than 65 ⁇ 10-a but less than 90 ⁇ 10-a, corresponding to spinning take-off speeds of approximately 4000 to 5000 m / min.
  • the false twist applied to the yarns should be of the order of magnitude given by the Heberlein formula (see, for example, GB-PS-707859, claim 1) or even higher.
  • the simultaneous stretching false wire texturing required according to the invention is preferably carried out at room temperature without the use of a heating device.
  • the method according to the invention requires the use of spinning yarns or threads that already have a high degree of pre-orientation, which, for. B. can be described by a birefringence of over 65 x 10- 3 but under 90 x 10- 3 .
  • pre-oriented yarns are produced at spinning take-off speeds of over 4,000 to approx. 5,000 meters per minute. It has now been found that such highly oriented, but not yet fully drawn, spun threads can be converted into a weakly crimped texturing yarn with the help of false-wire texturing machines if these threads are exposed to the full false twist and a simultaneous drawing at temperatures up to 30 ° C. above the freezing temperature.
  • textured yarns are obtained which are distinguished by a slight crimp, for example that of set yarns, and in particular have no deformations in the profile of the individual filaments.
  • the missing or extremely low deformation of the profile of the individual filaments leads to the use of yarns whose individual filaments, for. B. have a sharp-edged triangular profile, to glitter yarns that are particularly in demand for fashionable effects.
  • the threads textured in this way also have low thermal shrinkage at 200 ° C.
  • the drawing and texturing temperature determines the amount of thermal shrinkage, to a lesser extent also the crimping, which can be represented numerically by the crimping.
  • the glitter effect ie the maintenance of the profile, remains in the temperature range according to the invention below about 100 ° C for polyethylene terephthalate largely independent of temperature, as can also be seen from Example 7 or Figure 4.
  • a special glitter effect i. H.
  • a particularly slight deformation of the sharp-edged profiles is observed when using spun threads or yarns, which were obtained with winding speeds of about 4,200 to 4,800 meters per minute on conventional spinning systems.
  • the method according to the invention differs fundamentally from the method described in US Pat. No. 4,173,860.
  • this procedure of the previous literature only slightly oriented yarns, e.g. B. were obtained with a winding speed of 1,000 meters per minute, stretch textured.
  • a clearly visible drawing point is formed, at which the diameter of the individual filaments is abruptly reduced and tangible drawing heat is released.
  • stretching of polyester multifilaments is only possible if a small heater is additionally used, which in turn ensures that the freezing temperature is at least exceeded, which is significantly higher for polyesters than for polyamides.
  • Such a heater is required in any case when using low-oriented yarns, since otherwise an unevenly drawn yarn, in which drawn and undrawn points alternate, is obtained.
  • the simultaneous false twist texturing method described in GB-A-852579 could also not be used as a model for the present invention since, like US-A-4173 860, it is limited only to the processing of slightly pre-oriented thread material.
  • the process described in GB-A-852 579 requires drawing at least in a ratio of 1: 2.
  • the examples are only directed to the processing of polyamide yarns in which cold drawing is possible. When this method is used, a strongly crimped yarn is obtained after the crimp has been triggered; the individual filaments have the typical deformation into hexagons. Such yarns show no or only an extremely slight glitter effect.
  • the threads or yarns do not assume temperatures which are more than 30 ° C. above the freezing temperature of the drawn polymer during simultaneous drawing and false-wire texturing. These temperatures are surely exceeded when the customary polyamide threads are drawn, forming a drawing point. As a result, deformation of the profile of the individual filaments is unavoidable in stretch texturing. The same applies accordingly to poorly oriented polyester filaments.
  • the z. B. were wound up with 1,000 or 2,000 meters per minute, do not allow to stretch evenly at temperatures below the freezing temperature.
  • the insert yarns for the drawn-filament texturing of profiled yarns have a birefringence of approximately 65 ⁇ 10-a to 90 ⁇ 10-a in order to maintain the profile well and to be low Get thermal shrink.
  • a major advantage of the method according to the invention is that for the first time a stretch texturing method could be made available which largely avoids the usual deformation of the filaments into hexagons without the formation of lint.
  • the effect of this profile maintenance leads to a significant improvement in the glitter effect in threads with triangular profiles.
  • the method according to the invention is also suitable for obtaining different types of cross sections such.
  • the crimp values of the glitter yarns produced according to the invention are in the range of the so-called set yarns, that is to say yarns which have been produced on so-called double heater false-wire texturing machines or by a separate steaming process. In contrast to this, however, no heater or only a heater with significantly lower temperatures than usual is required in the method according to the invention.
  • the method according to the invention thus surprisingly delivers yarns with little crimping and low thermal shrinkage without the use of heat or only using relatively low temperatures, which according to the prior art can only be achieved by false-wire texturing processes with a texturing heater temperature of over 200 ° C. and a similar temperature of the second set heater can be obtained, or by a steaming process of the wound-up textured yarns following the texturing.
  • the process according to the invention provides yarns by means of a simultaneous draw texturing process, the preservation of the profile of which is even better than that of yarns which are produced by separate draw and texturing processes, as can be seen from the examples.
  • This method of measurement has the advantage that, in addition to its good practical relevance, it provides readily reproducible values which summarize the change or the deformations of the profile.
  • e.g. B only small areas of individual filaments can be checked and evaluated in microscopic examinations.
  • a summary evaluation, which also takes into account deformations that do not always occur, is practically only possible via light reflection measurements on a large number of individual filaments.
  • the false-wire-textured yarn according to the invention is characterized in that its profile maintenance, represented as the maximum value of the reflection curve, is at least 65% of the value of the smooth feed yarn and its thermal shrinkage at 200 ° C. is below 20%, preferably below 10%.
  • a stretched multifilament yarn (“Kops-Ware”) made of dtex 76f24 glz polyethylene terephthalate was used as the starting yarn, the filaments of which had a well-defined triangular profile.
  • Figure 2 shows the reflection values of the starting material (curve 1) and the HE yarn obtained (curve 2), while in Figure 3, in addition to the starting material (curve 1), the reflection values of the set yarn obtained (curve 2) as a function of the angle relative to the Sample level are reproduced.
  • Polyethylene terephthalate multifilaments which had been obtained at winding speeds of 3000 to 4900 meters per minute, served as insert yarns.
  • the individual filaments each had a sharp-edged profile that corresponded to an equilateral triangle in cross section.
  • the other properties of the threads and the texturing temperature are summarized in the table below.
  • the texturing was carried out on converted stretch twisting machines which were equipped with a contact heater of 125 cm in length and had friction swirlers from Fischer AG with 3 x 3 ceramic discs of the "Kyocera" type.
  • the other process conditions, in particular the surface temperature of the texturing heater, are summarized in the table below, as are the test values of the textured threads obtained.
  • the relative reflection value, which was determined as described in Example 1, was again used to characterize the deformation of the profiles which occurred during texturing.
  • a texturing temperature of e.g. B. 160 ° C leads to the usual, highly voluminous yarns with the usual deformation of the filament cross-sections to hexagons. (See table on page 8 f.)

Claims (3)

1. Procédé de fabrication de fils multifilaments texturés comportant des monofilaments profilés à section transversale non circulaire, dont la matière génératrice de filaments est en polyesters macromoléculaires, par étirage/texturage en fausse torsion de fils de départ fabriqués par une méthode de filage rapide, procédé caractérisé en ce que les fils de départ, qui présentent une pré-orientation correspondant à une biréfringence de plus de 65 x 10-3 mais inférieure à 90 x 10-3, sont soumis à un étirage et à un texturage en fausse torsion simultanés, avec des valeurs de torsion correspondant à peu près aux valeurs usuelles données par la formule de Heberlein :
Figure imgb0007
ou plus élevée, les fils étant chauffés à une température qui n'est pas supérieure à 30 °C à la température de transition vitreuse du polymère.
2. Procédé selon la revendication 1 caractérisé en ce que l'opération d'étirage et de texturage simultanés est effectuée sans appareil de chauffage, à la température ambiante.
3. Fil texturé en fausse torsion constitué de filaments en polyesters à profil triangulaire, fil caractérisé en ce que la conservation de son profil, représentée par la valeur maximale de la courbe de réflexion, est égale à au moins 65 % de la valeur donnée par le fil de départ lisse, et en ce que son thermorétrécissement à 200 °C est inférieur à 20 %, de préférence inférieur à 10 %.
EP82103083A 1981-04-18 1982-04-10 Procédé pour la fabrication de fils de polyester texturés à partir de filaments de section non-ronde, et fils ainsi obtenus Expired EP0063735B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813115759 DE3115759A1 (de) 1981-04-18 1981-04-18 "verfahren zur herstellung von texturiertem profilgarn und die dabei erhaltenen garne"
DE3115759 1981-04-18

Publications (3)

Publication Number Publication Date
EP0063735A2 EP0063735A2 (fr) 1982-11-03
EP0063735A3 EP0063735A3 (en) 1984-04-11
EP0063735B1 true EP0063735B1 (fr) 1986-07-09

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EP82103083A Expired EP0063735B1 (fr) 1981-04-18 1982-04-10 Procédé pour la fabrication de fils de polyester texturés à partir de filaments de section non-ronde, et fils ainsi obtenus

Country Status (3)

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US (1) US4487011A (fr)
EP (1) EP0063735B1 (fr)
DE (2) DE3115759A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3225964A1 (de) * 1982-07-10 1984-01-12 Hoechst Ag, 6230 Frankfurt Verfahren zum herstellen eines texturierten mischgarnes
US4712366A (en) * 1985-12-28 1987-12-15 Nippon Ester Co., Ltd. Denier-mixed composite yarn, denier-mixed special thick and thin yarn, false twist yarn and denier-mixed shrinkage-mixed composite yarn
US5579629A (en) * 1989-03-23 1996-12-03 Rhone-Poulenc Viscosuisse S.A. Method of producing a friction texturized polyester filament yarn and yarn made thereby
FR2659669B1 (fr) * 1990-03-16 1992-06-12 Rhone Poulenc Fibres Fil a aspect file de fibres a base de polyamide.
FR2677376B1 (fr) * 1991-06-07 1994-04-01 Rhone Poulenc Fibres Procede pour l'obtention de fils polyamides avec une meilleure productivite.
US5471828A (en) * 1993-05-04 1995-12-05 Wellman, Inc. Hot feed draw texturing for dark dyeing polyester

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB852579A (en) * 1957-03-26 1960-10-26 British Nylon Spinners Ltd Improvements in or relating to yarn and its manufacture
US3091912A (en) * 1957-04-19 1963-06-04 Leesona Corp Method of processing stretch yarn and yarns produced thereby
GB890053A (en) * 1959-07-03 1962-02-21 British Nylon Spinners Ltd Improvements in or relating to crimped yarn
US3529323A (en) * 1965-06-23 1970-09-22 Monsanto Co Apparatus for producing yarn having individually and permanently twisted filaments
GB1142617A (en) * 1965-07-16 1969-02-12 Ici Ltd Improvements in or relating to processes for yarn crimping
GB1098545A (en) * 1965-09-10 1968-01-10 Ici Ltd Low-torque, multifilament compact yarn
US3936999A (en) * 1970-04-06 1976-02-10 Teijin Ltd. False twist-crimped polyester yarns production
DE2116502A1 (de) * 1970-04-06 1971-10-21 Teijin Ltd., Osaka (Japan) Falschdrallgekräuseltes Polyester garn und Verfahren zu seiner Herstellung
US3695026A (en) * 1970-08-06 1972-10-03 Fiber Industries Inc Flange false twist textured nylon
DE2211843A1 (de) * 1972-03-11 1973-09-20 Hoechst Ag Verwendung unverstreckter polyaethylenterephthalatfaeden
DE2259434A1 (de) * 1972-12-05 1974-06-06 Bayer Ag Verfahren zur simultanstrecktexturierung von endlosgarnen
DE2336509B2 (de) * 1973-07-18 1976-09-23 Barmag Barmer Maschinenfabrik Ag, 5600 Wuppertal Verfahren zur herstellung eines gebauschten und gekraeuselten multifilgarnes
US4173860A (en) * 1975-03-03 1979-11-13 Mcklveen John R Textured synthetic fiber yarn and process for making same
US4041689A (en) * 1975-11-11 1977-08-16 E. I. Du Pont De Nemours And Company Multilobal polyester yarn
FR2411254A1 (fr) * 1977-12-12 1979-07-06 Monsanto Co Fil a lobes multiples pour texturation

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Publication number Publication date
EP0063735A2 (fr) 1982-11-03
US4487011A (en) 1984-12-11
EP0063735A3 (en) 1984-04-11
DE3271922D1 (en) 1986-08-14
DE3115759A1 (de) 1982-11-04

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