WO2005038106A1 - Dispositif et procede pour le traitement thermique de fil, notamment pour la texturation par air - Google Patents

Dispositif et procede pour le traitement thermique de fil, notamment pour la texturation par air Download PDF

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Publication number
WO2005038106A1
WO2005038106A1 PCT/CH2004/000611 CH2004000611W WO2005038106A1 WO 2005038106 A1 WO2005038106 A1 WO 2005038106A1 CH 2004000611 W CH2004000611 W CH 2004000611W WO 2005038106 A1 WO2005038106 A1 WO 2005038106A1
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WO
WIPO (PCT)
Prior art keywords
yarn
steam
channel
treatment
insert
Prior art date
Application number
PCT/CH2004/000611
Other languages
German (de)
English (en)
Inventor
Christian Simmen
Kurt Klesel
Mauro Zanellato
Original Assignee
Heberlein Fibertechnology, Inc.
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 Heberlein Fibertechnology, Inc. filed Critical Heberlein Fibertechnology, Inc.
Priority to EP04761951A priority Critical patent/EP1675981A1/fr
Publication of WO2005038106A1 publication Critical patent/WO2005038106A1/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
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/02—Heat treatment
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/001—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass in a tube or vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/168—Sealings between relatively-moving surfaces which permits material to be continuously conveyed

Definitions

  • the invention relates to a device for the thermal treatment of filament yarn in a steam pressure zone by means of steam with a yarn pass, which has an inlet and an outlet throttle for the steam pressure zone, furthermore to a method for the thermal treatment of filament yarn by means of compressed steam, the yarn being used for the thermal treatment is continuously passed through a yarn pass through a steam treatment stage with an overpressure of 0.1 to 30 bar.
  • a very important quality feature for a synthetic, thermoplastic yarn produced by a spinning process is the orientation of the filament-shaped macromolecules to the axis of each individual filament from a yarn.
  • the orientation of the thread-like macromolecules significantly influences the shrinking of the game like the textiles made from it.
  • the required mechanical fiber properties can only be achieved if the thread-like macromolecules are approximately parallel.
  • the process is initiated by the spinning process, in which the orientation increases with the spinning speed. But even with fast-spun, partially drawn yarns, especially with POY, the orientation is not sufficient, so that a drawing process has to be connected.
  • the orientation depends on the stretch ratio.
  • Heat setting is the most important method for the treatment of synthetic yarns when drawn under dry heat, steam or hot water. A distinction is made between heat setting without and with applied voltage. The process helps to significantly improve the overall dimensional stability. Treated filament yarns and staple fibers show low heat shrinkage, twists have a lower tendency to curl, and fabrics for clothing improve wrinkle recovery, permanent pleats and creases have a longer shelf life.
  • the mechanism of heat setting presupposes a semi-crystalline, super-molecular structure. The most common method is to heat the yarn before and / or after stretching using heated godets or so-called hot pins.
  • the heat transfer is limited by the very brief physical contact of the yarn on the surface of godets or hot pins, so that, for example, the processing speed of hot pins is less than 500 m / min due to quality. is.
  • the use of heated godets is limited by the complex construction.
  • HCS Hot Channel Stretching
  • FDY fully drawn plain yarns
  • SET treatment or relaxation is intended to bring the shrinkage behavior of synthetic yarn to the lowest possible value.
  • An important area of application is the thermal treatment of air-blown textured yarns, the so-called loop yarns, in which the loop structure is positively influenced. Thermal treatment has many other areas of application in yarn finishing. However, there are two basic areas of application:
  • W099 / 45182 is an example for the production of loop yarn, with hot steam being provided before and / or after a texturing nozzle within a continuous steam chamber and the temperature range preferably being 150-220 ° C.
  • EP 0 703 306 proposes a method and a device for simultaneously stretching and braiding pre-oriented thermoplastic multifilament yarns, which is carried out in a single device, whereby the yarn, which is kept under tension, is caused to unite in a direction transverse to the yarn direction To pass a jet of steam or a jet of another gaseous fluid and be hit by it at a temperature suitable for drawing, thereby simultaneously drawing and braiding the yarn.
  • the applicant set itself the task of developing a method and yarn treatment nozzles which allow the yarn connection to be pre-consolidated, in particular with the highest possible consistency of a slight structural intervention.
  • the aim was to establish the connection immediately after the spinnerets and e.g. at the highest yarn transport speeds. directly in connection with the application of preparation agents e.g. 3000 to 7000 m / min. to create.
  • preparation agents e.g. 3000 to 7000 m / min.
  • DE 195 46 784 proposes a device for the relaxing heat treatment of filament yarns made of synthetic polymers.
  • a compact device for the relaxing heat treatment of filament yarns made of synthetic polymers with condensing water vapor is provided, which essentially consists of a ballast nozzle, an injector nozzle as an entry into a treatment channel, which has at least two narrow points, and a ballast chamber and is heated.
  • the solution should be able to be integrated into a known rapid spinning process. The great advantage is seen in the fact that no seals on the inlet and outlet side are required to prevent steam loss.
  • WO01 / 51 6591 makes a special proposal in that yarn treatment is to be carried out using a treatment chamber with liquid.
  • a labyrinth seal is provided when entering and leaving the treatment chamber.
  • a heating medium e.g. Steam.
  • the device is designed in two parts. The interesting thing about this proposal is the possibility, depending on the design of the yarn treatment chamber, to produce a knot or loop yarn or a false twist on the yarn.
  • the centerpiece is a heating pipe into which a gaseous or a liquid heating medium is introduced.
  • Saturated steam with heating medium pressures of up to 25 bar and more is preferably used. It has been recognized that a significant problem lies in the loss of heating medium in In view of the very high steam pressures of over 20 bar in the treatment tank, it should be reduced and steam or condensate should not escape from the steam deposits.
  • a heating device for the heat treatment of textile yarns is proposed, which has a heating tube that can be passed by the yarn in the axial direction to accommodate a gaseous or liquid heating medium, which has seals on both tube ends.
  • the capillary bores are designed as grooves that connect several chambers.
  • the chambers can be formed as blind bores, ring-shaped grooves or ring sector-shaped recesses.
  • the bolts for threading can be pulled out using a handle.
  • the U-shaped groove or the corresponding capillary is thus exposed for the insertion of the yarn.
  • the yarn can be pulled through the treatment chamber, which has a considerable length of 0.5 m and more, inserted one after the other into the groove of the bolts and inserted again, so that after steam has been supplied via a steam tap, the steam treatment is started in the work mode can. This solution could not solve a dilemma.
  • Fine capillaries can maintain the vapor pressure and prevent the loss of steam even at very high vapor pressure.
  • the capillaries must be dimensioned so large that knots from tying two yarn ends can pass through the capillaries without interference.
  • the compromise to be chosen in practice was not suitable for implementing the solution in industrial production. Either there were too many thread breaks, precisely because of the knots, or if the capillaries were too large, the losses were too great.
  • the three-part design of the heating device with a treatment tank and the bolt that can be pushed in and out on both sides was unsatisfactory in practice. No prior art solution has succeeded in bringing it to a wider industrial use. This is surprising insofar as condensing water vapor allows a very intensive heat transfer, in any case a multiple compared to, for example, the hot air or the transfer by godets or hot pins.
  • the invention was based on the task of seeking an economically optimal and trouble-free use of steam and especially for practical handling and a corresponding device structure, also with regard to threading the yarn, and also to optimize the thread-like macromolecular structure of yarn by means of a steam treatment stage ,
  • the device according to the invention is characterized in that the yarn passage is channel-like and has three channel zones: a vapor pressure channel piece, an inlet labyrinth and an outlet labyrinth, the yarn passage as a whole being exposed for threading and being able to be brought into an open threading position and a closed operating position.
  • the method according to the invention is characterized in that the yarn passage, including an inlet and an outlet choke, is channel-like and can be brought as a whole into an open threading division and a closed operating position for threading without tools.
  • the new solution has surprisingly succeeded in fulfilling the two basic requirements of practical handling of a steam treatment device and economically optimal use.
  • All state-of-the-art solutions have been designed to meet specific requirements.
  • the aim was steam treatment of yarn in the range from 180 ° to 200 ° C., which requires steam pressures of over 20 bar.
  • the required vapor pressure in the treatment tube could be maintained with a capillary-shaped seal structure; however, this had to be bought with the price of a very uncomfortable threading and too many yarn breaks. With all other solutions, the threading was not at all or solved very impractically.
  • the channel-shaped design is a very important aspect of the new invention, so that on the one hand the steam medium is brought specifically to the yarn and on the other hand the exposure of the whole treatment channel is simplified.
  • the channel shape provides an optimal starting point for its exposure. This is in contrast to any chamber-like form of steam treatment.
  • the steam chamber model was based on older methods of batch-wise treatment of entire coils in containers. This overlooked the fact that with saturated steam or post-dried steam with the heat of condensation, intensive action and extremely rapid heat transfer are possible.
  • Post-dried steam is understood to be a steam free of a steam / water mixture.
  • the heat of condensation can be transferred in the range of milliseconds.
  • filament yarn has a very aggressive effect on the individual filaments.
  • the new invention proposes three channel zones.
  • the length of the steam pressure duct piece can be determined as required. For physical reasons, there is a constant, defined temperature in the steam pressure duct section. With the labyrinth-like design of the inlet and outlet throttle for the steam pressure channel piece, the steam pressure is reduced. The flow of steam is deflected very strongly in many cases in a labyrinth with flow, so that the effect of the steam on the yarn is additionally intensified by multiple deflection.
  • a very important aspect is that company conversions can be carried out without specialist staff, such as a company mechanic, if possible. This particularly affects threading. The operating personnel should be able to set the relevant operating positions themselves with an auxiliary key by simply loosening and tightening again.
  • the new invention allows several particularly advantageous configurations. For this purpose, reference is made to claims 2 to 1 1 and 1 3 to 1 7.
  • a first requirement is that a temperature of over 100 ° C and a uniform overpressure of at least 0.1 bar is generated with saturated steam or post-dried steam in the steam pressure channel piece, which is broken down via the two labyrinths.
  • An overpressure of up to 20 bar or more can be used in the steam pressure channel piece with saturated steam.
  • the thermal exposure time in the entire yarn treatment channel preferably lasts from 5 to 50 milliseconds. The heat of the steam flowing out on both sides is used as far as possible.
  • a vapor overpressure of 0.5 to 3.5 bar is generated in the steam pressure channel piece and, accordingly, a uniform steam temperature in the range of 110-150 ° C. is maintained. It has been shown that this is the majority of thermal treatments in industrial practice can be carried out successfully.
  • the higher pressure and temperature range is reserved for special treatment applications, which can be implemented in practice by a corresponding length, in particular, the inlet labyrinth and the outlet labyrinth, with total lengths of the yarn treatment channel in the order of magnitude of, for example, 1 meter and more.
  • the inlet labyrinth and the outlet labyrinth are preferably arranged approximately symmetrically with respect to the vapor pressure channel piece, so that the vapor pressure is reduced evenly on both sides of the vapor pressure channel piece.
  • the game treatment channel has a length of e.g. 20 to 100 cm and for higher pressures, as already mentioned, up to one meter and more.
  • the length of the yarn treatment channel in each case corresponds to more than 5 times, preferably more than 10 times the largest transverse dimension of the yarn treatment channel.
  • the steam treatment stage is formed within a divided body.
  • the thread treatment channel is exposed for threading by a sliding movement and closed again for the operating state, the steam supply being switchable at the same time.
  • the steam treatment stage can be brought into two positions, wherein it has a steam valve device which, with the displacement movement, either releases the steam supply for the thermal treatment of the filament game or steam circulation in the device.
  • the device could not be switched to the two positions, although this is very important for industrial practice.
  • Industrial practice requires constant operating conditions during production. However, constant conditions prevail in the specific case only after uniform heating of the area surrounding the yarn pass. This can take a few minutes. Without this measure, condensate would be created with every change or start-up state, and there would be a risk that yarn would be exposed to liquid drops.
  • the yarn treatment channel be formed within an insert, the entire flow channel being able to be brought into an open threading position and into a closed operating position by means of a planar displacement movement.
  • a cover is particularly preferably pressed onto the insert for the operating state under spring pressure and is lifted off at a slight angle for the displacement movement, in order to relieve the sliding movement.
  • the device has a steam valve device which simultaneously switches the steam supply with the displacement movement.
  • the yarn treatment channel has a vapor extraction device directly in front of the inlet opening of the inlet labyrinth and immediately in front of the outlet opening of the outlet labyrinth. This prevents steam and, with the steam, also preparation agents from flowing into the free space.
  • the two labyrinths are designed in such a way that a preferably identical section with the smallest free and straight transport opening is formed next to the steam pressure channel piece.
  • the pressure reduction takes place preferably via sharp flow deflections in a large number of labyrinths arranged one after the other. This allows the free transport cross section to be dimensioned larger, without the disadvantage of a deterioration in the maintenance of the vapor overpressure in the vapor pressure channel piece.
  • the device have a plate-like insert with at least four plates: a duct plate, a steam chamber plate, a diversion plate and a base plate, the steam chamber plate preferably consisting of two parts exists and the entire plate-like insert is soldered as a package.
  • the plate-like structure has the enormous advantage that there is complete freedom, for example, to define the dimensions and design of the entire labyrinth, so that any changes can also be made subsequently.
  • the insert is fixed in a housing and sealed with respect to the steam supply and the exhaust steam line.
  • a cover plate is pressed onto the insert with spring pressure and brought into a threading position and an operating position via a sliding mechanism.
  • the spring pressure must be so great that there is no gap between the cover and the insert, even at the highest steam pressures, and under no circumstances can hot steam flow into the free space.
  • the housing preferably has a pivotable hinged lid which can be opened for threading and brought into a closed position for the operating state, such that a closed vapor space is formed in the interior of the housing for internal heating of the entire insert and the cover plate.
  • a particularly expedient embodiment lies in the fact that the mechanism for pivoting the hinged lid can also be used to actuate the displacement mechanism for closing and opening the yarn treatment channel. With a single movement, not only is the yarn treatment channel exposed, as in the case of air nozzles, but at the same time an internal steam space that can be isolated from the outside is opened and closed.
  • 1 a, 1 b, 1 c show three examples for the use of thermal treatments before and / or after an air bladder intervention with a stretching zone; 2a shows a laboratory test bench for testing the main functions according to the solutions in FIGS.
  • FIG. 1a, 1b and 1c with a set treatment on the left and a stretching on the right again individually;
  • Figure 3a shows the yarn run, as it is arranged in a thin vapor space plate; viewed in a cross-section, the yarn pass has a square shape;
  • Figure 3b in the middle of a channel plate and on both sides a plate half of the steam space plate;
  • 4a shows a complete insert with four plates in a perspective view;
  • Figure 4b shows the four plates of Figure 4a in an exploded view;
  • 5 shows an entire steam treatment device in a section V - V of FIG. 2c;
  • FIG. 6 different damper concepts;
  • FIGS. 7a to 7g different areas of application for the damper according to the invention;
  • FIG. 8a a loop yarn produced with solutions of the prior art
  • FIG. 8b shows a loop yarn produced with the solution according to the invention
  • 9 shows the relationship between steam pressure and steam temperature, according to the school book
  • FIG. 10 shows an example of air-blast texturing with steam.
  • FIGS. 1 a to 1 c shows different applications of the damper according to the invention in accordance with current textile engineering practice.
  • W099 / 45182 the respective use or areas of use of the damper 1, 1 'and 1 "and 1 * and 1 * * are marked in the sense of the new invention.
  • FIG. 2a shows a test stand 2, which naturally has several process sequences, essentially with the conditions that industrial practice allows.
  • two yarns A and B are fed to the test device at the top, approximately in the middle of the picture. Both yarns are guided via motor-driven and heated hot pins 3 and 4 or 5 and 6.
  • the hot pins 3 and 4 as well as 5 and 6 are regulated very precisely in terms of the circulating speed and the outside temperature that is relevant for the yarn, so that the at different feed and take-off speeds, the yarn undergoes very precise drawing.
  • the hot pins are not heated to operate the test facility according to the new invention.
  • the heat required for drawing is applied by dampers 1 'and 1 "through the action of saturated steam.
  • the two drawn yarns A' and B ' are subsequently fed to an air-blasting texturing unit 7 and a loop yarn C is produced.
  • the loop yarn is immediately after the exit from the air blast texturing unit 7 is guided via a take-off godet so that the yarn transport is guided through the air blast texturing with high speed constancy via the driven pins 4 and 8 or 6 and 8.
  • a second damper 1 * this becomes via a deflecting roller 9 and after the damper 1 * via a deflecting roller 10 directly to a winding station 1 1.
  • the damper 1 * is a SET treatment of the textured yarn, so that the loop structure in particular can be greatly optimized and above all 2b and 2b are the two ver steps, namely the stretching (right) and the SET treatment (left) again shown individually.
  • the structural length L 'of the damper can be relatively short, for example 15 to 30 cm, when stretched.
  • a length of more than 30 cm, for example from 50 cm to 100 cm or more is generally required for the SET treatment, so that a correspondingly longer exposure time at a transport speed can be ensured.
  • the transport speed is no longer changed.
  • the yarn speed changes very strongly in accordance with the work intervention from a feed speed Vo or Vo 'or to Ve.
  • Figure 3a shows the top element 20, in which the entire yarn pass GBL is attached.
  • Typical, but not mandatory, is a symmetrical design with respect to a central plane M - M for the yarn inlet side GE, yarn outlet side GA and an essentially unobstructed straight yarn passage, as indicated by the two arrows 21 and 21 '.
  • the heart of the yarn pass is a steam pressure channel piece 22 with the inlet labyrinth 23 adjoining on both sides, which is an inlet throttle, and an outlet labyrinth 24, which is an outlet throttle.
  • the corresponding throughput lengths are designated G23, G22 and G24.
  • a short extension piece E On both sides of the labyrinths is a short extension piece E, each with a steam suction 25, which prevent hot steam from being released into the environment.
  • a short inlet piece 26 and a corresponding outlet piece 27 are again designed like a labyrinth. Both have a throttle function again, as it were as a safety barrier, so there is never steam can escape into free space.
  • the throttle function on both sides and the steam extraction are also important because the aim is to prevent preparation agents from escaping with a steam outlet.
  • the uppermost element 20 consists of two parts 28 'and 28 ".
  • the two-part design has an enormous advantage for the production, since each part can be produced by itself using an optimal process, for example by means of a laser process or
  • the channel width B-Dd for the steam pressure channel piece 22 and BL for the inlet labyrinth and the outlet labyrinth can only be determined before the assembly of an entire insert 30 (FIG. 4a).
  • FIG. 3b is an exploded view between the two Parts 28 ', 28 "of the uppermost element 20 shown a channel plate.
  • the channel plate 31 has the purpose of supplying and removing the steam.
  • the steam is fed into the steam pressure channel piece via a longitudinal slot 32, which is fed evenly through bores 33.
  • the shape of the longitudinal slot roughly corresponds to that of the steam pressure duct piece 22. A part to prevent direct blowing disturbances on the yarn can still be covered.
  • the steam suction takes place via a respective longitudinal hole 34 or. 34 '.
  • the insert 30 is constructed in the manner of a plate in accordance with FIG. 4a and has a damper plate 20, a channel plate 31, a diversion plate 35 and a base plate 36 from top to bottom. All four plates, if each made of metal, can be soldered firmly for installation so that there is no leakage between the plates.
  • the diversion plate has a diversion function, depending on the position of the steam supply, the steam is either supplied for a production position according to arrow 37 and discharged according to arrow 38. In the second position, the steam is guided into a circulation flow via a slot 39.
  • FIG. 5 shows an entire steam treatment device.
  • the insert 30 with a cover 40 is located approximately in the center.
  • the insert 30 is sealed off from the housing 42 by a seal 41, so that no steam leakage can occur at this point either.
  • the housing 42 is well thermally insulated over the entire circumference, a sheet or plastic jacket 44 being provided on the outside and an insulation layer 43 being provided on the inside.
  • the hot parts, namely the insert 30, the lid 40 and the steam supply 47 are thus protected, so that no hot parts can be touched for normal manipulations from the outside.
  • the interior 48 can be exposed via a hinged lid 45 by means of an opening lever 46.
  • FIG. 6 shows schematically four damper concepts, with the length L of the damper always being the same as an assumption; on the far left is a simple pass, as shown in Figures 1 to 5.
  • t means the dwell time in the damper; V the entry speed and Lab the number of labyrinths.
  • the deflection roller is arranged in the damper and in the figure on the far right, two deflection rollers are arranged in the interior of the damper.
  • Figures 7a to 7f show different possible areas of application for the new invention.
  • Figure 7a is a false twist texturing with a polypropylene yarn. A steam temperature of up to 1,50 ° C is required here.
  • Figure 7b shows an application of yarn based on polyester. The example shows the use of a damper according to the invention, a steam temperature of 150 ° C. and a downstream dry heater which electrically heats the yarn to 190 ° C. to 200 ° C.
  • FIG. 7b shows the use for the draw winding and FIG. 7d for the SDY / FDY spin draw process.
  • FIG. 7c shows a BCF spin-draw texturing;
  • FIG. 7f shows a DT draw twist system and FIG.
  • FIG. 7g shows an SDY7 / FDY spinning draw process for technical yarns.
  • FIG. 8 shows two examples of loop yarns, a yarn according to the prior art being shown above and a yarn according to the new invention shown below. With the use of the new invention, a reduction in the loop size can be achieved.
  • the knitted tube is denser and more regular.
  • Figure 8 essentially shows the relationship between steam pressure and steam temperature according to the school book. The important thing here is that the higher the desired steam temperature, the higher the required steam pressure. In industrial practice, the generation and handling of steam pressures up to 5 bar is still very inexpensive. From more than 5 bar, the production of saturated steam and the cost of sealing become more expensive.
  • FIG. 10 shows a schematic overview in relation to the new texturing process.
  • the separate process stages are progressively shown from top to bottom.
  • Smooth yarn 100 is transferred from above via a first delivery unit LW1 to a given transport speed V1 Texturing nozzle 101 and passed through the yarn channel 104.
  • Via compressed air channels 103 which are connected to a compressed air source P1, highly compressed, preferably not heated, air is blown into the yarn channel 104 at an angle ⁇ in the transport direction of the yarn.
  • the yarn channel 104 is opened conically in such a way that a strongly accelerated air flow with supersonic, preferably with more than Mach 2, occurs in the conical section 102.
  • the shock waves generate the actual texturing, as is described in detail in WO97 / 30200 mentioned at the beginning.
  • the first section from the air injection point 105 into the yarn channel 104 to the first section of the conical extension 102 serves to loosen and open the plain yarn so that the individual filaments are exposed to the supersonic flow.
  • the texturing takes place depending on the level of the available air pressure of 9, 12 to 14 bar and more, either within the conical part 102 or in the outlet area. There is a direct proportionality between Mach number and texturing. The higher the Mach number, the stronger the impact and the more intense the texturing. There are two critical parameters for the production speed:
  • Th . vor: thermal pretreatment, possibly only with yarn heating or with hot steam.
  • G.mech . Yarn treatment with the mechanical effect of a compressed air flow (supersonic flow).
  • the production speed could reach up to 1500 m / min. can be increased without breakdown of the texturing and without slagging, the limit being given by the existing test facility.
  • the best texturing qualities were possible at production speeds of well over 800 m / min. be achieved.
  • a) Thermal aftertreatment or relaxing An important quality criterion for texturing is judged by the person skilled in the art based on the yarn tension of the yarn emerging from the texturing nozzle, which is also recognized as a measure of the intensity of the texturing.
  • the yarn tension is established on the textured yarn 106 between the texturing nozzle (TD) and a delivery unit LW2. In this area, between the texturing nozzle (TD) and the delivery unit LW2, a thermal treatment is carried out on the yarn under tension and the yarn is heated to approx. 180 ° C.
  • Thermal pretreatment also has a positive effect on the texturing process.
  • a combinatorial effect between shrinkage and yarn opening in the section between the air injection point in the yarn channel and the first section of the conical expansion, in the area of the supersonic speed, may be the cause of the success here.
  • the stiffness is reduced by warming up the yarn, so that the prerequisite for loop formation in the texturing process is improved.
  • tests with both hotplate and hotpin as heat sources were successfully completed. It may also help that the thermal pretreatment of the yarn avoids a negative cooling effect due to the air expansion in the texturing nozzle, and therefore the texturing of the heated yarn is improved. With the very high transport speed, part of the heat in the yarn itself is retained up to the area of the loop formation.
  • the additional thermal process steps are preferably carried out locally or carried out shortly or immediately after the running yarn.
  • the procedural interventions are not isolated in this way, but are combined in a joint venture between two suppliers. This means that the yarn is only held at the beginning and at the end, both mechanical air intervention and thermal intervention take place in between.
  • the thermal treatment is carried out on the tension in the filaments or in the yarn, which is still mechanically generated by the compressed air.

Abstract

L'invention concerne un dispositif et un procédé pour le traitement thermique de fil continu au moyen de vapeur dans une zone de compression de vapeur. Ce dispositif présente un passage de fil qui comporte un étranglement d'entrée et un étranglement de sortie pour la zone de compression de vapeur. Le passage de fil se présente sous la forme d'un canal et comporte trois zones: une partie de canal de compression de vapeur, un labyrinthe d'entrée et un labyrinthe de sortie. Le passage de fil peut être entièrement dégagé pour l'insertion du fil et peut être placé dans une position d'insertion de fil ouverte et une position de fonctionnement fermée. Ledit procédé sert au traitement thermique de fil continu au moyen de vapeur comprimée, le fil étant guidé pour le traitement thermique en continu à travers un passage de fil d'un étage de traitement à la vapeur à une surpression comprise entre 0,1 et 30 bars.
PCT/CH2004/000611 2003-10-21 2004-10-04 Dispositif et procede pour le traitement thermique de fil, notamment pour la texturation par air WO2005038106A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04761951A EP1675981A1 (fr) 2003-10-21 2004-10-04 Dispositif et procede pour le traitement thermique de fil, notamment pour la texturation par air

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH1792/03 2003-10-21
CH17922003 2003-10-21
CH19902003 2003-11-21
CH1990/03 2003-11-21

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WO2005038106A1 true WO2005038106A1 (fr) 2005-04-28

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008025411A1 (fr) * 2006-08-26 2008-03-06 Oerlikon Textile Gmbh & Co. Kg Procédé de traitement thermique d'un fil à déroulement continu ainsi que machine de retordage pour la mise en œuvre dudit procédé
WO2009021851A1 (fr) * 2007-08-14 2009-02-19 Power-Heat-Set Gmbh Récipient de thermofixation

Citations (3)

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