EP0124454A1 - Verfahren zur Verbesserung der Strukturgleichmässigkeit von Fasern aus thermoplastischen Polymeren - Google Patents

Verfahren zur Verbesserung der Strukturgleichmässigkeit von Fasern aus thermoplastischen Polymeren Download PDF

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Publication number
EP0124454A1
EP0124454A1 EP84420072A EP84420072A EP0124454A1 EP 0124454 A1 EP0124454 A1 EP 0124454A1 EP 84420072 A EP84420072 A EP 84420072A EP 84420072 A EP84420072 A EP 84420072A EP 0124454 A1 EP0124454 A1 EP 0124454A1
Authority
EP
European Patent Office
Prior art keywords
speed
roller
stress
filaments
thermoplastic polymers
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.)
Granted
Application number
EP84420072A
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English (en)
French (fr)
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EP0124454B1 (de
Inventor
Gérard Perez
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.)
Rhone Poulenc Fibres SA
Original Assignee
Rhone Poulenc Fibres SA
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Publication date
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Application filed by Rhone Poulenc Fibres SA filed Critical Rhone Poulenc Fibres SA
Publication of EP0124454A1 publication Critical patent/EP0124454A1/de
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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
    • D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins

Definitions

  • the present invention relates to a process for improving the regularity of structure and the properties of filaments, threads, fibers, based on thermoplastic polymers, more particularly polyesters and polyamides.
  • the present invention applies to processes for spinning in the molten state and continuous drawing, that is to say to known methods for obtaining wires oriented directly on a spool, possibly at high speed, methods according to which the filaments are first entrained by a take-up roller or delivery rollers before being stretched and then rewound, directly or possibly after another treatment.
  • Slight variations in the properties of the threads can have various and unexpected causes such as uncontrolled and accidental changes in the extrusion temperature, the flow rate of the die, the diameter of the orifices (which can be modified by agglomerated polymer) , the blowing speed, the speed of the filaments (sliding of the wires on the rollers), the viscosity, etc.
  • French application No. 2 311 868 envisages controlling the spinning speed of polyamide-based yarns, for example by means of a roller driven by a substantially constant torque in order to obtain in particular better uniformity of the titer.
  • British patent 988 994 provides for controlling the speed of the drawing roller to a continuous measurement of the modulus of the filaments.
  • Russian Patent No. 914,662 proposes to measure the tension force of the threads, in particular at the winding level by measuring the "specific linear electrical resistance" of the threads, then the tension force is kept within certain limits by a regulator .
  • thermoplastic polymers obtained by melt spinning and continuous drawing by regulation at a constant level of the drawing stress of the filaments. between the take-up roller and the drawing roller, the speed of the drawing roller being kept constant.
  • drawing roller and drawing roller is also meant according to the present application a set of drawing rollers and a set of drawing rollers.
  • the stress upstream of the last stretching roller is measured and regulated at a constant level.
  • the continuous spinning-drawing process is a process in which the filaments are driven by a take-up roller rotating at a speed V 1 before passing onto another roller driven at a constant speed V: according to the invention, as soon as '' a modification of the stress is detected, which can come from one or more parameters mentioned above, one can, for example, adapt the speed of the take-up roller so that the stress returns to a predetermined and constant level .
  • the drawing itself can be carried out cold or hot, at a controlled temperature according to known methods (heating rollers, ovens, etc.), in one or more stages.
  • Such a method makes it possible to regulate the structure of the filaments as well as all the properties linked to the state of orientation of the fibers, in particular the birefringence, the modulus at the origin, and the secant modules, and allows, inter alia, '' obtain a very regular dye affinity.
  • thermoplastic polymers which are structured as a function of the stretching stress.
  • polyesters such as polyethylene terephthalate glycol optionally plugged with a small percentage of a tri agent - or tetrafunctional (such as thylolpropane trimethylolpropane, pentaerythritol, trimellitic acid, trimesic, pryomellique etc.
  • a tri agent - or tetrafunctional such as thylolpropane trimethylolpropane, pentaerythritol, trimellitic acid, trimesic, pryomellique etc.
  • polyamides such as polyhexamethylene adipamide and copolyamides comprising at least 85% of hexamethylene adipamide units and up to 15% of other units, obtained by replacing, for example, the starting adipic acid. by another diacid such as terephthalic acid, sebacic acid, and / or by replacing the two monomers with caprolactam.
  • polyamides such as polycaprolactam, and other polymers such as polypropylene.
  • this process makes it possible to limit the transitional period linked to accidental variations in the characteristics of the polymer.
  • the intrinsic viscosity of the polyester is evaluated by calculation from the measurement of the specific viscosity on a solution at 1% by weight by volume in orthochlorophenol at 25 " C and a value of 0.25 for the HUGGINS constant
  • the specific viscosity is measured using a viscometer of the "Ostwald" type.
  • the toughness, elongation and secant modulus measurements at 5% elongation are carried out using a device known commercially under the brand INSTRON 1122 according to standard NF G 07 003.
  • a polyethylene terephthalate matified with 0.5% by weight of titanium oxide of intrinsic viscosity 0.68 is prepared.
  • the polymer is melted in a extruder and brought to the die at a temperature of 293 ° C. then spun through a die maintained at 285 ° C., comprising 30 orifices with a flow rate of 110 g / min.
  • the filaments are cooled transversely by an air blower, are sized and then are driven by a system of take-up rollers, rotating at a peripheral speed of 5,130 m / min, and the temperature of which is 120 ° C.
  • the wires then pass over a system of stretching rollers heated to 130 ° C on which they are driven at a speed of 6,470 m / min before being wound up on a reel, under a winding tension force of 15 cN to produce a 170 dtex wire.
  • the stress value is 10.2 cN / tex + 0.3 cN / tex and the drawing rate that the wires undergo is 1.261 X.
  • the intrinsic viscosity of the polymer drops to a value of 0.64.
  • the stress measurement device immediately indicates a rise in the stress level to 11.4 cN / tex and an automatic system connected to the take-up rollers makes it possible to increase their speed to a value of 5,340 m / min.
  • the filaments obtained have, before and after the variation in viscosity, the following characteristics: (measured on 10 different coils, with 20 measurements on coil).
  • the standard deviation of the value of the secant modulus at 5% elongation is 18 cN / tex.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
EP19840420072 1983-04-29 1984-04-18 Verfahren zur Verbesserung der Strukturgleichmässigkeit von Fasern aus thermoplastischen Polymeren Expired EP0124454B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8307299A FR2545107B1 (fr) 1983-04-29 1983-04-29 Procede pour ameliorer la regularite de structure des filaments a base de polymeres thermoplastiques
FR8307299 1983-04-29

Publications (2)

Publication Number Publication Date
EP0124454A1 true EP0124454A1 (de) 1984-11-07
EP0124454B1 EP0124454B1 (de) 1986-11-26

Family

ID=9288492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840420072 Expired EP0124454B1 (de) 1983-04-29 1984-04-18 Verfahren zur Verbesserung der Strukturgleichmässigkeit von Fasern aus thermoplastischen Polymeren

Country Status (5)

Country Link
EP (1) EP0124454B1 (de)
JP (1) JPS59204908A (de)
CA (1) CA1230716A (de)
DE (1) DE3461486D1 (de)
FR (1) FR2545107B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283097A3 (de) * 1987-03-20 1990-07-25 ENICHEM FIBRE S.p.A. Verfahren zur Herstellung eines Polyamid-6-Fadens
EP0346641A3 (de) * 1988-06-11 1991-01-23 Zimmer Aktiengesellschaft Verfahren zur Herstellung gleichmässiger POY-Filamente

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220119991A1 (en) * 2019-02-26 2022-04-21 Kuraray Co., Ltd. Liquid crystal polyester multi-filament and method for manufacturing same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB988994A (en) * 1963-08-28 1965-04-14 H M Morgan & Co Inc Improvements relating to transducers for use in the measurement and control of the modulus of elasticity in filar structures
FR2311868A1 (fr) * 1975-05-22 1976-12-17 Monsanto Co Procede de production d'un fil de nylon 66
FR2504898A1 (fr) * 1981-04-29 1982-11-05 Schweizerische Viscose Procede et dispositif pour la mesure de la tension d'un fil en mouvement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB988994A (en) * 1963-08-28 1965-04-14 H M Morgan & Co Inc Improvements relating to transducers for use in the measurement and control of the modulus of elasticity in filar structures
FR2311868A1 (fr) * 1975-05-22 1976-12-17 Monsanto Co Procede de production d'un fil de nylon 66
FR2504898A1 (fr) * 1981-04-29 1982-11-05 Schweizerische Viscose Procede et dispositif pour la mesure de la tension d'un fil en mouvement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283097A3 (de) * 1987-03-20 1990-07-25 ENICHEM FIBRE S.p.A. Verfahren zur Herstellung eines Polyamid-6-Fadens
EP0346641A3 (de) * 1988-06-11 1991-01-23 Zimmer Aktiengesellschaft Verfahren zur Herstellung gleichmässiger POY-Filamente

Also Published As

Publication number Publication date
JPS59204908A (ja) 1984-11-20
EP0124454B1 (de) 1986-11-26
CA1230716A (fr) 1987-12-29
FR2545107A1 (fr) 1984-11-02
FR2545107B1 (fr) 1985-06-28
DE3461486D1 (en) 1987-01-15

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