EP0052845B1 - Etirage dans l'eau - Google Patents

Etirage dans l'eau Download PDF

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Publication number
EP0052845B1
EP0052845B1 EP81109691A EP81109691A EP0052845B1 EP 0052845 B1 EP0052845 B1 EP 0052845B1 EP 81109691 A EP81109691 A EP 81109691A EP 81109691 A EP81109691 A EP 81109691A EP 0052845 B1 EP0052845 B1 EP 0052845B1
Authority
EP
European Patent Office
Prior art keywords
stretching
predrawing
temperature
water
main drawing
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
EP81109691A
Other languages
German (de)
English (en)
Other versions
EP0052845A1 (fr
Inventor
Erich Helmut Keil
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Priority to AT81109691T priority Critical patent/ATE5979T1/de
Publication of EP0052845A1 publication Critical patent/EP0052845A1/fr
Application granted granted Critical
Publication of EP0052845B1 publication Critical patent/EP0052845B1/fr
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
    • D01D5/12—Stretch-spinning methods
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/28—Stretching filaments in gas or steam

Definitions

  • the invention relates to a method for stretching fiber cables made of polyester with a pre-stretching and a main stretching at a predetermined value for the total stretching ratio.
  • a very similar method for preheating cables made of polyester threads is known from DE-AS 2149793.
  • the cables are then passed through an immersion bath at 40-65 ° e while circulating the penultimate roller of the infeed roller mill.
  • the purpose is to heat the cable evenly. Even after this publication, the cable therefore always remains at an elevated temperature from the water bath until it is stretched.
  • the fiber cables obtained according to this state of the art, or the staple fibers obtained from them do not yet meet the requirements placed on them in every respect, in particular not with regard to the uniformity of the dyeability.
  • the object of the invention is therefore to achieve a further improvement in the uniformity of the stretching of fiber cables, which is expressed in a significant reduction in the number of dyeing errors.
  • the stretching ratio, stretching temperature and stretching medium should remain freely selectable.
  • the method according to the invention achieves this object in that pre-stretching in water takes place at 71-90 ° C., that the stretching ratio in the pre-stretching is chosen between 1: 1.05 and 1: 1.6 so that the main stretching takes place at a minimum of Stretching tension occurs and that the fiber cables between the preliminary and main stretching cool again to below 40 ° C.
  • the draw ratio in the pre-draw zone is preferably below 1: 1.4, very particularly preferably in the range from 1: 1.1 and 1: 1.3.
  • Fiber cables are endless structures made up of a large number of filaments and by combining the filaments of several spinnerets.
  • the fiber cables have titers of up to 1 million dtex and more. After the common treatment of all filaments, they are usually cut into staple fibers, which in turn are further processed into spun fiber yarns
  • the fiber cables used in the process according to the invention consist of polyester, i.e. from linear high polymers and at least 85% repeating units from terephthalic acid and a dihydric alcohol The remaining 15% of the repeating units of the polymer can be formed by comonomers in both the dicarboxylic acid and the glycol components.
  • the pre-stretching is an orienting stretching, that is to say one which is accompanied by an increase in the birefringence, but is not yet associated with the formation of a stretching point.
  • a stretch point is understood to mean the suddenly and clearly visible change in diameter (“bottle neck”) of polyester filaments with little orientation during stretching.
  • the birefringence of the spun fabric only increases with a pre-stretching ratio of 1: 1.05.
  • the preliminary stretching is carried out in water.
  • Water means both pure water and aqueous solutions or emulsions e.g. the usual textile auxiliaries, finishing agents or preparations.
  • the water has a temperature of 71-90 ° C. If the temperature is outside these limits, the number of staining errors increases significantly.
  • the preliminary drawing in water at 71-90 ° C. is carried out with a drawing ratio such that the drawing tension required in the main drawing reaches a minimum. This results in pre-drawing ratios between 1: 1.05 and 1: 1.6. A deviation from these drawing ratios in the pre-drawing zone leads to a deterioration in the uniformity of dyeing.
  • the main stretching is carried out as usual, for example in steam or in hot water. The best results are obtained if you do the main stretching in hot water.
  • the main stretch is also an orienting stretch. In contrast to the pre-stretching, it is with Stretch point formation connected.
  • the main stretching can also take place in two stages or be followed by the different fixing processes, the advantage of the method according to the invention is retained.
  • the preliminary drawing is carried out in such a way that the required drawing tension in the main drawing takes a minimum.
  • the minimum of the stretching tension in the main stretching zone is determined by varying the pre-stretching ratio.
  • the yield stress is the quotient of the tensile force of the fiber cable, which can be measured with a commercially available tensile force meter (e.g. from Schmidt, Waldkraiburg), and the final titer of the stretched fiber cable.
  • the final titer of the stretched fiber cable is the product of the spinning titer used with the total stretch ratio used.
  • the fiber cables cool to below 40 ° C. between the preliminary and the main drawing. This does not necessarily require active, additional cooling, but can be achieved by routing the fiber cables around unheated rollers. Since several cables are always used in fiber cables due to the large forces that occur, e.g. Roller septets, the fiber cables then assume almost room temperature on their own, provided that there is no additional heating. However, cooling the rolls with water is advantageous.
  • the number of staining errors is determined from staining with rhodamine:
  • the colored cable tape is then rinsed under running tap water until the water no longer shows a red color.
  • the cable tape is washed out for at least 15 minutes in a solution of 0.5 g / l of an alkylaryl polyglycol ether (emulsifier O Hostapal CV from Hoechst AG) for about 75-80 ° with frequent stirring and rinsed again with running tap water until no more foam is visible .
  • an alkylaryl polyglycol ether emulsifier O Hostapal CV from Hoechst AG
  • the counting of undrawn capillaries or gluing to rhodamine-colored cable ties is carried out in a dark room under UV light. Undrawn capillaries shine bright to dark red.
  • a polyethylene terephthalate fiber cable made of 446080 filaments with a single titer of the stretched fiber of 1.7 dtex was stretched in two stages between roller septets.
  • the width of the fiber cable was about 30 cm.
  • the first septet ran at a peripheral speed of 43 m / min at room temperature. Between the first and second septet there was a water bath at 79 ° C and 3.20 m in length. The speeds of the 2nd septet are shown in Table 1, the temperature of the rolls of the 2nd septet was 14 ° C. The pre-stretching ratio VV results from the speeds of the first and second septet. From the 2nd septet the fiber cable ran through a 2nd drawing bath of 3.60 m in length and a temperature of 79 ° C to a 3rd septet which with a peripheral speed of the rollers of 118 m / min at a temperature of the rollers of 185 ° C ran. The total draw ratio GV was 2.7. A fourth septet with a temperature of 140 ° C and a peripheral speed of 116 m / min followed.
  • the table also shows the properties of the fibers obtained and the measured values of the drawing tension in the pre-drawing W and in the main drawing HV and the number of dyeing errors per 20 g of staple fibers.
  • Table 1 shows how the minimum number of dyeing errors per 20 g of fibers is achieved with the minimum of the stretching tension in the main drawing.
  • Example 1 was repeated at a constant speed of 51.6 m / min of the 2nd septet, that is to say a pre-stretching ratio of 1: 1.2, as had been found to be ideal according to Example 1. This time, however, the temperature of the 1st bath was varied.
  • Table 2 shows how the number of rhodamine events (staining error initially decreases with increasing water temperature up to 80 ° C, but then rises again with increasing water temperature.
  • Fig. 4 shows this graphically.
  • the 1st septet ran at a circumferential speed of 48 m / min at room temperature.
  • the first water bath had a temperature of 80 ° C.
  • the second septet each had a peripheral speed of 57.6 m / min, which results in a pre-stretching ratio of 1: 1.2, the godet temperature was varied.
  • the second water bath was 80 ° C.
  • the third septet had a temperature of 179 ° C, the fourth septet 135 ° C.
  • Table 3 shows how, under largely constant drawing conditions, the number of dyeing errors increases sharply if the fiber cable cannot cool down before reaching the second water bath, but is kept at 70 ° C or 80 ° C by heated godets. With this mode of operation, the total draw ratio even had to be reduced, since a large number of torn filaments led to winding on the 3rd septet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Water Treatment By Sorption (AREA)
  • Artificial Filaments (AREA)

Claims (3)

1. Procédé pour étirer des câbles pour fibres de polyester avec un étirage préliminaire et un étirage principal à une valeur prédéterminée du taux d'étirage global, procédé caractérisé en ce que l'étirage préliminaire s'effectue dans de l'eau à 71 à 90°C; en ce qu'on choisie le taux d'étirage, dans l'étirage préliminaire, entre 1:1,05 et 1:1,6 de manière que l'étirage principal s'effectue à une valeur minimale de la tension d'étirage; et en ce qu'on refroidit à nouveau au-dessous de 40°C le câble entre les étirages préliminaire et principal.
2. Procédé selon la revendication 1, caractérisé en ce que, dans l'étirage préliminaire, le taux d'étirage est inférieur à 1:1,4.
3. Procédé selon la revendication 1, caractérisé en ce que, dans l'étirage préliminaire, le taux d'étirage se situe entre 1:1,1 et 1:1,3.
EP81109691A 1980-11-24 1981-11-14 Etirage dans l'eau Expired EP0052845B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81109691T ATE5979T1 (de) 1980-11-24 1981-11-14 Wasserverstreckung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803044073 DE3044073A1 (de) 1980-11-24 1980-11-24 Wasserverstreckung
DE3044073 1980-11-24

Publications (2)

Publication Number Publication Date
EP0052845A1 EP0052845A1 (fr) 1982-06-02
EP0052845B1 true EP0052845B1 (fr) 1984-01-25

Family

ID=6117356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109691A Expired EP0052845B1 (fr) 1980-11-24 1981-11-14 Etirage dans l'eau

Country Status (4)

Country Link
US (1) US4418032A (fr)
EP (1) EP0052845B1 (fr)
AT (1) ATE5979T1 (fr)
DE (2) DE3044073A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2175875C (fr) * 1995-05-08 2006-11-28 Hoe Hin Chuah Methode de preparation de fils de poly(trimethyleneterephtaloyl)
CN1160492C (zh) * 1998-03-31 2004-08-04 宇部日东化成株式会社 拉伸方法和拉伸产物
DE202007006816U1 (de) * 2007-05-11 2008-09-18 Coroplast Fritz Müller Gmbh & Co. Kg Handeinreißbares Gewebe-Klebeband

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2918346A (en) * 1956-08-07 1959-12-22 Du Pont Process of orienting a dense tow of polymeric ester filaments by two step hot aqueous bath treatments
DE1660140A1 (de) * 1965-01-29 1970-07-16 Patentdienst Anstalt F Verfahren zum kontinuierlichen Verstrecken endloser,synthetischer Faeden
GB1088015A (en) * 1965-02-23 1967-10-18 Monsanto Co Polyester drawing process
JPS479226U (fr) * 1971-02-19 1972-10-04
JPS4714055U (fr) * 1971-03-18 1972-10-19
DE2149793B2 (de) * 1971-10-06 1977-03-10 Zimmer Ag, 6000 Frankfurt Verfahren zum verstrecken eines kabels aus polyesterfaeden

Also Published As

Publication number Publication date
DE3162051D1 (en) 1984-03-01
DE3044073A1 (de) 1982-07-08
EP0052845A1 (fr) 1982-06-02
ATE5979T1 (de) 1984-02-15
US4418032A (en) 1983-11-29

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