EP0682720B1 - Schmelzspinnverfahren für filamente - Google Patents

Schmelzspinnverfahren für filamente Download PDF

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Publication number
EP0682720B1
EP0682720B1 EP95900885A EP95900885A EP0682720B1 EP 0682720 B1 EP0682720 B1 EP 0682720B1 EP 95900885 A EP95900885 A EP 95900885A EP 95900885 A EP95900885 A EP 95900885A EP 0682720 B1 EP0682720 B1 EP 0682720B1
Authority
EP
European Patent Office
Prior art keywords
yarn
air
speed
air current
thread
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
EP95900885A
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German (de)
English (en)
French (fr)
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EP0682720A1 (de
Inventor
Ronald Mears
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.)
MEARS, RONALD
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0682720A1 publication Critical patent/EP0682720A1/de
Application granted granted Critical
Publication of EP0682720B1 publication Critical patent/EP0682720B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D01D5/08—Melt spinning methods
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
    • D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
    • 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
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching

Definitions

  • the invention relates to a method of manufacture (for spinning) filaments e.g. made of polyester, polyamide (Polycondensates) or polypropylene. There will also be corresponding ones Devices proposed.
  • the Filament delivery speeds increase by the extrusion of a melt is formed by a spinneret will.
  • the level of "delivery speed" is not absolute value that can apply to any spinning process. Rather, it becomes dependent on the thread to be spun certainly. For example, it is basically between technical Differentiated threads and textile threads, and textile Threads themselves are now called POY (Partially Oriented Yarn) or spun as FDY (Fully Drawn Yarn).
  • the expression "assisted accompanying air flow” is supposed to indicate the effect of special means, that generate an accompanying air flow that differs from one Accompanying air flow differs, which anyway when moving the thread through the air by sweeping the thread arises.
  • the aforementioned proposals all saw the generation of the supported air flow after the solidification of the Thread.
  • the invention is based on findings, some of which in Article "Schnellspinnen von Polyamid 6.6" by Dr. H. Breuer et al in the magazine “Chemical fibers / textile industry", September 1992, page 662ff. After these Insights are the textile technology and morphological Fast spun polycondensate data in one wide range regardless of the spinning conditions. Just the take-off speed has a noticeable influence.
  • the invention is based on the further finding that the influence of the take-off speed is actually over the load on the thread (filament stress) until it solidifies affects. Accordingly, according to the invention Measures are taken to target this burden and thereby to influence the thread properties.
  • the invention provides a melt spinning process before, on the surface of the thread a Air flow is generated in the thread running direction, thereby characterized that the flow over at least one Part of the length of the thread flows where the polymer material is still has not been frozen, and that over this partial length of the thread, the speed of the air flow in the thread running direction is so high that the thread has no or negligible stress due to friction between the thread and the adjacent layer of air.
  • the thread is preferably supplied to a winding device and in it to a coil (pack) at a given Speed wound up.
  • the winding speed be so high that from a predetermined point in the spinning line at the thread speed prevailing at this point without assisting the air flow in the direction of the thread, the friction between the thread and an additional load on the thread in the adjacent air layer would cause which affect the thread properties would.
  • an air flow at such a high speed in the Thread running direction creates the frictional forces between the thread and the adjacent air layer below one Limit where they significantly affect the thread properties can.
  • the air flow preferably accompanies the thread at least to a point in the spinning line where the thread properties essentially by the friction forces mentioned can no longer be influenced, i.e. up to one Point near a point where the polymer material solidifies has been.
  • the speed of the air flow will up to the point mentioned so high that the unwanted Frictional forces do not arise.
  • the air flow is preferably generated such that it flows as evenly as possible in the thread running direction means that it has as little turbulence as possible and if possible small lateral forces on the thread exercises.
  • the invention continues to see a melt spinning process, after which the thread to a Spooling device is delivered where it is attached to a spool predetermined speed is wound up, the Winding speed is set so high that without Support the air flow in the direction of the thread "Necking" would occur in the thread course, characterized in that that the air flow in the thread running direction is supported in such a way that necking is avoided.
  • the first aspect of the invention can be advantageous with the second aspect can be combined, creating special advantages can be achieved because this causes the strain on the thread when Freezing is reduced in two ways, namely, that the forces acting on the thread be reduced and that the exaggerated rejuvenation (Necking) the thread before solidification is avoided.
  • the invention is initially based on the simplest possible Spinning line explained, so the description is not incidental Explanations is difficult. That is why POY method has been chosen as an example.
  • the invention is not limited to this example. For example by applying known godets to others Procedure to be adjusted. This is after the description of the figures briefly discussed it again.
  • FIG. 1 schematically shows part of a nozzle plate 10, a single hole 12 in this plate 10, creating a Melt 14 is pressed out by means not shown, and the resulting filament 16.
  • the simplicity for the sake of a single filament 16 is shown - but it can known to be several filaments 16 simultaneously (each by a separate hole can be formed in the plate 10).
  • This in 1 is completed by that the filament 16 in a bobbin 18 in a winding unit (Winder or winder) 20 is wound up.
  • Windder or winder winding unit
  • the filament tapers compared to its original cross-section when pressed from hole 12. Find below EP solidification point no further (substantial) change in the filament cross-section instead of.
  • the speed of a "polymer particle" between the nozzle plate and the winder influenced by very complex effects, some of which have not yet been researched. After the polymer has solidified, this is in an arrangement according to FIG. 1 Speed (the "take-off speed") only and determined solely by the winder 20, and it applies from the freezing point EP into the winder 20.
  • Stress FR Q
  • Q is the area size of the cross section in the thread piece mentioned.
  • the stress, the resultant FR and the area size Q are all three a function of the distance from the nozzle plate 10.
  • the level of the load is immediately after the filaments emerge hardly depends on the air friction from the spinneret, because the filament speed is relative in this area is low.
  • the burden in this area is from Acceleration and the viscosity in the longitudinal direction dependent. But after the acceleration of the filament speed exceeds a certain limit, one occurs substantial additional load due to air friction, if no measures are taken, this additional burden to avoid or limit.
  • the amount of stress during solidification is for some filament properties (such as the elongation at break, the tensile strength, the cooking shrink and some more) decisive.
  • This stress for example with POY spinning, the more the values of the achievable thread properties are less favorable out.
  • FIG. 2 The elements of Figure 2 are basically the same as that 1, and they have the same reference numerals Mistake. The difference is that Means (not shown in Fig. 2) are provided for a To generate airflow LS in the direction of the thread.
  • the current LS now forms the filament 16 above the solidification point EP adjacent layer of air at a speed VR flows in the direction of the thread, which is the same (or almost as high) as the speed of the Filament surface.
  • the frictional forces Fr are therefore now negligible, which is a decrease in the resultant FR enables.
  • the air flow LS contacts the filament 16 first at a point EB that is at a distance A below the plate 10 is arranged and it remains in contact with the filament up to the solidification point EP.
  • Fig. 3 shows a first embodiment for practical implementation of the new principle.
  • the nozzle plate is now at 25 indicated the winder at 27 and the one building up in the winder Coil with 28.
  • Filaments 29 formed (three shown) attached to one given point P can be combined into a thread F.
  • In front of the winder 27 there is a finish by means of a metering device 31 applied and at most a vortex performed by the device 33.
  • the metering pump is not shown, which supplies the spinneret 25 with melt and with a given quantity / time unit. This quantity along with the number of holes in the nozzle plate and the Take-off speed gives the thickness of each filament, the so-called decitex per filament. If corresponds the procedure the usual today.
  • the chamber 43 forms an extension of the tube 35 in the Thread running direction, so that the thread without deflection after the Passing through the tube 35 also through the chamber 43 and out an outlet 45 can run out.
  • the exit is 45 constructed in such a way that it does not prevent the thread from running, but the entry of room air into the chamber 43 at this Counteracts. Ceramic thread guides can be found at the outlet 45 46 can be provided.
  • the distance between the exit 45 and the device 31 can be chosen to be short, that no significant tension build-up due to air friction on solidified thread can take place.
  • the lower end part of the chamber 43 is a perforated surface 47 formed and is surrounded by a collecting ring 49, the connected to the vacuum generator 37 via a channel 51 is.
  • Means are preferably provided in or on the channel 51, to be able to control the flow rate, e.g. a valve 53, a throttle 55 and a measuring device 57 to the Measure differential pressure before or after the throttle.
  • the chamber 43 is in the direction of the thread expanding connector (a "trumpet") 58 with the Tube 35 connected.
  • the high air speed in tube 35 this will reduce something before the air enters the chamber 43 occurs.
  • Another slowdown takes place when crossing from the chamber 43 into the collecting ring 49 instead.
  • By these measures will increase the risk of turbulence reduced in airflow.
  • By reducing the Air speed below the tube 35 can be the thread tension may be increased, which may be for winding is advantageous.
  • For the usual winding process is one Inlet tension of the thread in the range 0.08 to 0.15 CN / dtex advantageous.
  • a tapered in the direction of the thread Mouthpiece (a "funnel") 59 is provided above the upper end 39 of Tube 35 .
  • the funnel 59 (and possibly also the trumpet 58) are preferably with a profile on its inner surface, if possible little turbulence is generated in the air flow.
  • the funnel 59 is arranged inside a perforated cylinder 61, through which room air is sucked in.
  • This perforated Cylinder 61 extends back to the heater box 63, which comprises the spinneret 25.
  • Another perforated Cylinder 65 may be provided around the first cylinder 61 to form a calming space 67 in between, which also helps to avoid air turbulence.
  • a roller (a godet) or roller unit After leaving chamber 43 (in front of the winder) a roller (a godet) or roller unit can be provided. As a result, the "roving" emerging from the chamber are stretched, which is to produce FDY yarns or technical yarns can be used.
  • the godet could but only serve to tighten the thread tension before winding affect without aiming to stretch.
  • the perforated cylinder 61 can be a wire mesh, perforated Sheet, sintered body or fiber element are formed. Of the minimum diameter of the cylinder 61 is so large that the still (thick) liquid filaments 29 the inner surface of the Do not touch cylinder 61.
  • the axial length can be 5 to 200 cm.
  • the tube 35 may have an inner diameter e.g. of 0.5 cm up to 20 cm.
  • the material of the pipe is not important if the filaments touch the inner surface do not stick to it and the wall itself does not melt.
  • the inner diameter of the tube 35 is compared to the negative pressure to choose the generator 37 so that the necessary Air speed in the tube 35 can be maintained. This air speed is preferably as high or even even higher than the take-off speed, i.e. the filament speed after freezing.
  • a protected zone Z can be between the spinneret 25 and a place where the incoming air flow touched the filaments for the first time. This zone Z can thereby that a ring 64 is formed on the heating box 63 is attached below the spinneret 25.
  • the heater box 63 can alternatively even below the spinneret 25th push forward.
  • the incoming air can be preheated.
  • air blasting agent 60 are provided, the air jets in the Introduce the axial direction of the tube 35 along the inner surface. These air blasting means 60 can also be used as aids can be used for threading.
  • Fig. 4 shows a variant, which cooling the thread slows down to the startle of the polymer upon exit to avoid from the spinneret 25.
  • the nozzle 25 is in this Case followed by a heated sheath 70 which one prevents sharp drop in thread temperature.
  • This effect is further supported by the cylinder 61 in an upper part 61A and a lower part 61B by one Foreclosure 72 is divided, above the foreclosure Warm air is supplied to the cylinder part 61A while the relatively cold room air access to the cylinder part 61B is granted.
  • the air flow in tube 35 could arise from blown air, which is inserted into the upper end of the tube.
  • the air speed when entering the tube 35 can be influenced by an aperture 74, which the cylinder 61st surrounds and opposite the cylinder in the thread running direction can be moved.
  • the aperture 74 has no perforation and therefore limits the access of indoor air to the perforated Cylinder 61 (or enables this access if the aperture 74 is moved down).
  • the air speed in tube 35 should be the thread speed correspond as previously explained.
  • a PES (polyester) yarn is wound at a speed of approx. 3600 m / min (without being wound up) to a Godet unit delivered.
  • the unit generates a delay of about 1.45 and the drawn yarn is at a take-off speed of approx. 5200 m / min spooled with a yarn to give up to 6 decitex per filament.
  • the delivery speed is increased the godet unit increased to approx. 7000 m / min without the properties of the original yarn to change significantly. Of the Delay remains unchanged, so the properties of the known yarns are retained.
  • the take-off speed is increased to more than 10,000 m / min.
  • PES or PA (polyamide) yarn is made at one speed between 400 and 600 m / min (e.g. PES tire cord, approx. 400 m / min) delivered to a godet unit. After stretching in the godet unit, the yarn is drawn off at a take-off speed between 2000 and 3500 m / min (e.g. PES tire cord, 2200 up to 2500 m / min).
  • the spooled yarn has one Strength from 7 to 9 g / den at up to 10 decitex per filament on.
  • the yarn can be Nozzle at a speed of more than 1000 m / min Properties unchanged compared to the known method to be delivered to the godet unit. This makes possible an increase in the take-off speed to more than 5500 m / min at also compared to the known method unchanged properties of the wound yarn.
  • High modulus, low shrinkage (HMLS) yarns are recently considered Tire cord has been used.
  • a PES yarn is used at a speed of 3000 to 3500 m / min a godet unit is delivered where the original is stretched.
  • the drawn yarn is at a take-off speed of approx. 6000 m / min.
  • this yarn can meet the requirement profiles for certain applications.
  • the embodiment according to Fig. 5 comprises e.g. a Spinneret 25, a tube 35, a chamber 43 and an air vent 51.
  • the area between the nozzle 25 and the tube 35 is 5 was not particularly shown, it can be shown in FIG. 3 or 4 can be designed.
  • a heat treatment channel in FIG. 5 80 is provided below the chamber 43 .
  • This channel goes through up flowing warm air (temperature e.g. 200 to 240 ° C) solidified yarn back to a temperature above the Glass point (but below the melting temperature) heated.
  • the yarn emerging from the channel turns on Godetschreib 82.84 delivered, the yarn through the Godets is not stretched.
  • the thread tension when entering the Godet pair is so high that the yarn on a stretch or Expansion point DP is stretched in the channel.
  • the thread tension after the Godet pair is suitable for winding in the winder 27.
  • FIG. 6 A preferred variant of this extended method is shown schematically in Fig. 6, wherein the heat treatment integrated in the device provided for this invention becomes. 6 shows the lower end part of the tube 35 (near the solidification point EP). Instead of chamber 43 3 is now a relatively large expansion channel 90 provided, e.g. around the air flow velocity of approx Reduce 7000 m / min to approx. 500 m / min.
  • the slow flowing air in channel 90 is through a heating means 92 heated to such a temperature that the yarn to a temperature above the glass point is heated below the melting point.
  • the Slowing the air flow also results in an increase in Air resistance (the air friction) and a corresponding Increase in thread tension. This results in a stretch or Expansion point DP in the lower part of channel 90. By stretching the crystallinity is increased, which is low Cooking shrinkage results. Yarns made by this process can be used directly in textile applications (e.g. Knitting, weaving) can be used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)
EP95900885A 1993-12-03 1994-12-02 Schmelzspinnverfahren für filamente Expired - Lifetime EP0682720B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH3610/93 1993-12-03
CH361093 1993-12-03
PCT/IB1994/000380 WO1995015409A1 (de) 1993-12-03 1994-12-02 Schmelzspinnverfahren für filamente

Publications (2)

Publication Number Publication Date
EP0682720A1 EP0682720A1 (de) 1995-11-22
EP0682720B1 true EP0682720B1 (de) 1998-06-03

Family

ID=4259692

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95900885A Expired - Lifetime EP0682720B1 (de) 1993-12-03 1994-12-02 Schmelzspinnverfahren für filamente

Country Status (8)

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EP (1) EP0682720B1 (enExample)
JP (1) JP4101869B2 (enExample)
KR (1) KR100344007B1 (enExample)
CN (1) CN1119461A (enExample)
BR (1) BR9406246A (enExample)
DE (1) DE59406138D1 (enExample)
TW (1) TW268054B (enExample)
WO (1) WO1995015409A1 (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000028117A1 (de) * 1998-11-09 2000-05-18 Barmag Ag Verfahren und vorrichtung zum herstellen eines hochorientierten fadens
US6716014B2 (en) 1998-07-23 2004-04-06 Barmag Ag Apparatus and method for melt spinning a synthetic yarn
US6899836B2 (en) 2002-05-24 2005-05-31 Invista North America S.A R.L. Process of making polyamide filaments

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5824248A (en) * 1996-10-16 1998-10-20 E. I. Du Pont De Nemours And Company Spinning polymeric filaments
US6090485A (en) * 1996-10-16 2000-07-18 E. I. Du Pont De Nemours And Company Continuous filament yarns
TW476818B (en) * 1998-02-21 2002-02-21 Barmag Barmer Maschf Method and apparatus for spinning a multifilament yarn
CN1141422C (zh) * 1998-06-22 2004-03-10 巴马格股份公司 用于纺合成长丝的纺丝装置
WO2000008242A1 (de) * 1998-08-07 2000-02-17 Barmag Ag Fadenpräparierung
DE19915762A1 (de) * 1999-04-08 2000-10-12 Lurgi Zimmer Ag Kühlsystem für Filamentbündel
US6444151B1 (en) * 1999-04-15 2002-09-03 E. I. Du Pont De Nemours And Company Apparatus and process for spinning polymeric filaments
EP1079008A1 (de) * 1999-08-26 2001-02-28 B a r m a g AG Verfahren und Vorrichtung zum Spinnen eines multifilen Fadens
DE50005349D1 (de) 1999-09-07 2004-03-25 Barmag Barmer Maschf Verfahren zum schmelzspinnen
US6692687B2 (en) * 2000-01-20 2004-02-17 E. I. Du Pont De Nemours And Company Method for high-speed spinning of bicomponent fibers
JP2003520303A (ja) 2000-01-20 2003-07-02 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー ２成分繊維の高速紡糸方法
KR101076550B1 (ko) * 2005-01-28 2011-10-24 엠엠알 마켓팅 앤드 매니지먼트 아게 로트크레우즈 유체를 압출하기 위한 방법
EP2550381A2 (de) * 2010-03-24 2013-01-30 Oerlikon Textile GmbH & Co. KG Verfahren und vorrichtung zum schmelzspinnen und abkühlen einer vielzahl synthetischer fäden
JP2015014071A (ja) * 2013-07-08 2015-01-22 Ｔｍｔマシナリー株式会社 糸条冷却装置
JP7149100B2 (ja) * 2018-05-16 2022-10-06 Ｔｍｔマシナリー株式会社 紡糸冷却装置
DE102022003355A1 (de) * 2022-09-12 2024-03-14 Oerlikon Textile Gmbh & Co. Kg Vorrichtung und Verfahren zur Herstellung synthetischer Fäden

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Publication number Priority date Publication date Assignee Title
CH468482A (de) * 1967-05-01 1969-02-15 Inventa Ag Vorrichtung zur Verhinderung von Luftwirbelbildung im Spinnschacht
US3611485A (en) * 1968-12-30 1971-10-12 Monsanto Co Spinning chimney
ATE131224T1 (de) * 1991-09-06 1995-12-15 Akzo Nobel Nv Vorrichtung zum schnellspinnen von multifilen fäden und deren verwendung.
DE9306510U1 (de) * 1992-06-13 1993-06-09 Barmag AG, 5630 Remscheid Spinnvorrichtung zum Spinnen synthetischer Fäden
DE4223198A1 (de) * 1992-07-15 1994-01-20 Zimmer Ag Verfahren und Vorrichtung zur Herstellung synthetischer Endlosfilamente
BR9400682A (pt) * 1993-03-05 1994-10-18 Akzo Nv Aparelho para a fiação em fusão de fios multifilamentares e sua aplicação

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6716014B2 (en) 1998-07-23 2004-04-06 Barmag Ag Apparatus and method for melt spinning a synthetic yarn
WO2000028117A1 (de) * 1998-11-09 2000-05-18 Barmag Ag Verfahren und vorrichtung zum herstellen eines hochorientierten fadens
US6478996B1 (en) 1998-11-09 2002-11-12 Barmag Ag Method and apparatus for producing a highly oriented yarn
US6899836B2 (en) 2002-05-24 2005-05-31 Invista North America S.A R.L. Process of making polyamide filaments

Also Published As

Publication number Publication date
EP0682720A1 (de) 1995-11-22
HK1009718A1 (en) 1999-06-04
KR960703374A (ko) 1996-08-17
JPH08506393A (ja) 1996-07-09
KR100344007B1 (ko) 2002-11-30
TW268054B (enExample) 1996-01-11
CN1119461A (zh) 1996-03-27
BR9406246A (pt) 1996-01-09
JP4101869B2 (ja) 2008-06-18
WO1995015409A1 (de) 1995-06-08
DE59406138D1 (de) 1998-07-09

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