EP0030670A1 - Procédé de lavage de filaments consécutivement à leur filage - Google Patents

Procédé de lavage de filaments consécutivement à leur filage Download PDF

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Publication number
EP0030670A1
EP0030670A1 EP80107493A EP80107493A EP0030670A1 EP 0030670 A1 EP0030670 A1 EP 0030670A1 EP 80107493 A EP80107493 A EP 80107493A EP 80107493 A EP80107493 A EP 80107493A EP 0030670 A1 EP0030670 A1 EP 0030670A1
Authority
EP
European Patent Office
Prior art keywords
spinning
washing
stage
belt
spinning belt
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
EP80107493A
Other languages
German (de)
English (en)
Other versions
EP0030670B1 (fr
Inventor
Michael Dr. Bueb
Robert Ing. grad. Brück
Prof. Dr. Muschelknautz
Dieter Dipl.-Ing. Paulini
Karlheinz Dr. Feltgen
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.)
Bayer AG
Original Assignee
Bayer 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6088279&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0030670(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bayer AG filed Critical Bayer AG
Priority to AT80107493T priority Critical patent/ATE9603T1/de
Publication of EP0030670A1 publication Critical patent/EP0030670A1/fr
Application granted granted Critical
Publication of EP0030670B1 publication Critical patent/EP0030670B1/fr
Expired legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
    • D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
    • D06B3/20—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics with means to improve the circulation of the treating material on the surface of the fabric
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
    • D06B3/04—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of yarns, threads or filaments

Definitions

  • the invention relates to a method and a device for carrying out a washing process immediately following the spinning of chemical fibers.
  • the fibers When spinning polyacrylonitrile fibers using the dry spinning process, the fibers still have about 10 to 30% solvent, e.g. Dimethylformamide. This solvent is usually largely removed from the fibers using an extraction process with water.
  • solvent e.g. Dimethylformamide
  • the slivers are usually. which is combined by several spinning shafts to form a spinning belt and placed in a spinning can at speeds of between 200 and 400 m / min. Several such slivers are subsequently pulled out of juxtaposed spinning cans again combined to form a larger band and fed at a rate of 20 to 70 m / min of a so-called after-treatment line in which the fiber ribbons various N are subjected achdians suitsen.
  • One of these post-treatment steps is the washing process or solvent extraction.
  • the spinning belt is expediently folded or compressed and the fiber sliver formed in this way is passed through the washing apparatus at a speed which is reduced in accordance with the folding or compression factor.
  • washing apparatuses after spinning in which the spinning belt is placed on a transporting base, the transport speed being lower than the delivery speed.
  • DE-OS 25 15 410 describes a washing process in which the spinning tapes are placed on a transport base, a layer of liquid being generated and maintained above the transport base and the liquid automatically flowing through the material lying on the base solely due to gravity . After passing through the washing section, the fibers placed on the base are placed unchanged as pies in pots.
  • the disadvantage of such a process is that the amount of fresh water required in a washing process carried out in one step is many times greater than in a multi-step countercurrent process and the achievable solvent removal is insufficient. Furthermore, it is disadvantageous that at the end of the washing process the spinning belt does not accelerate again to the spinning speed, is drawn smoothly and is stored or further processed in this state, e.g. can be stretched.
  • DOS 27 04 867 describes a sieve drum washing machine in which the transporting base is designed as a sieve drum through which the liquid flows from the outside in. Even with such a device, the targeted, multi-stage countercurrent flow of washing water and sliver is missing, so that a For economic reasons, excessive fresh water consumption occurs and the solvent removal is incomplete. Furthermore, the sliver cake initially formed is no longer dissolved at the end of the washing device, i . h . the compressed or folded fiber ribbon does not straighten again.
  • the invention has for its object to carry out a washing process immediately after the spinning, the sliver is e in the inlet in the washing apparatus initially folded or compressed delivered with spinning speed.
  • a possible completeness d strength solvent removal is to be achieved at the lowest possible fresh water usage.
  • This object is achieved in that the spinning belt is folded or compressed on a transport pad and the washing process is carried out on the folded spinning belt in countercurrent on this transport device.
  • the spinning belt is preferably smoothed out again after leaving the washing section and dewatered with the aid of a squeezing device.
  • the washed and dewatered spinning belt can first be put down in a spinning can and removed from it in a later step and further post-treatment steps such as Stretching, drying, crimping, etc.
  • the washed and dewatered spinning belt is immediately and continuously further post-treatment steps, such as a stretching process.
  • the washing process according to the invention is preferably carried out in such a way that the process is carried out in several stages, washing liquid being sprayed onto the folded spinning belt in each stage, the majority of which seeps through the spinning belt and through the transport device within the stage and then below the Transport device caught in a template and is repeated in repeated repetition under the showering on the belt in the same stage.
  • the spinning belt travels within each stage and before entering the next stage after showering, an area in which it is dewatered, e.g. by simply draining or by mechanical drainage devices such as Squeezing devices, or by pneumatic drainage devices, e.g. Air flow devices or vacuum chambers, below the transport device.
  • mechanical drainage devices such as Squeezing devices
  • pneumatic drainage devices e.g. Air flow devices or vacuum chambers
  • the invention further relates to an apparatus for performing this method.
  • the advantages achieved by the invention are in particular that the washing process can be carried out after spinning with a relatively simple and reliable apparatus.
  • the specific amount of fresh water required is relatively low.
  • the solvent is removed early and completely from the spinning belts and recovered. In connection with the tight encapsulation of the apparatus made possible by the process principle, this results in ecological advantages with regard to occupational safety and environmental protection.
  • the spinning belt 1 is folded and placed on a liquid-impermeable conveyor belt 5.
  • the sliver cake 6 is transported uphill at a small angle.
  • the washing liquid flows through the sliver cake under the effect of gravity.
  • the washed sliver 2 leaves the washing machine again in a stretched form.
  • the fresh water 3 flows through the sliver cake 6, accumulates on the way through the sliver cake with solvent and leaves the washing apparatus as washing water 4.
  • the washing success of the process will be.
  • washing liquid flows past the sliver cake laterally or in alleys and / or too much washing liquid is dragged along by the sliver cake in countercurrent. In this way, the liquids are mixed lengthways over the length of the apparatus and the countercurrent effect is reduced.
  • the washing liquid in accordance with the diagram in FIG. 2.
  • the sliver cake 6 is transferred on a transporting, liquid-permeable base 8 through a plurality of washing stages connected in series. p ortiert. Within each stage, washing water is sprayed onto the sliver cake from a liquid distributor 14. The wash water seeping 9 aserbandkuchen by F and by the pad 8 through and drips into the template 10. From this template, the washing liquid is pumped by a pump 12 back to the liquid distributor 14th
  • the sliver cake 6 must be dewatered within each stage before moving to the next stage to reduce longitudinal or backmixing within the apparatus. In the simplest case, this is done by draining. In this way the liquid content of the fiber cake is reduced to about 1 to 3 kg liquid / kg dry fibers.
  • mechanical dewatering aids such as pinches, A bsau- conditions etc. can be the amount of entrained liquid continue to reduce, for example, 0.4 to 2 kg liquor / kg dry fibers.
  • the washing liquid is conducted in countercurrent to the sliver cake.
  • the washing liquid 11 flows from the supply of the respective stage into the next one via the overflow weir 13.
  • the amount of liquid 15 pumped around is, for example, a factor of 1 to 10 greater than the amount of washing liquid 11.
  • the amount of pumped washing liquid 15 is, for example, a factor of 3-30 greater than the amount of fiber cake (based on dry substance).
  • the speed of the fiber cake is, for example example, 0.5 to 5 m / min, the dwell time within a stage, for example 5 to 300 s.
  • the wash water temperature is between 60 and 100 ° C.
  • Fi g. 3 is a schematic drawing of the washing process according to the invention following the dry spinning of man-made fibers.
  • the spinning belt 1 is drawn off from the spinning chutes 16 with take-off rolls 17 and is fed to the washing apparatus 18 at a speed of 100 to 400 m / min.
  • the washing apparatus consists, for example, of a vibrating trough which is excited by electromagnetic vibrators 19 and which the fiber cake at 0.5 to 5 m / min. through the washing machine.
  • Mechanical unbalance exciters can also be used instead of the electromagnetic vibrators.
  • wet fibers with a water content of 0.5 to 3 kg water / kg dry fibers can be conveyed.
  • the conveying of the sliver cake through the washing machine can also be done a wire belt or sieve belt.
  • the spinning belt is placed in compressed or folded form on the liquid-permeable bottom 22 of the vibrating trough.
  • the compression or folding factor is, for example, 10 to 800 and results from the ratio of delivery speed (100 to 400 m / min.) To transport speed on the washing machine (0.5 to 5 m / min.).
  • the bottom 22 can, for example, consist of a perforated plate, a wire mesh or slotted plates with a free cross-sectional area of 10 to 50%.
  • the storage is expediently carried out with the aid of a traversing device 21 which distributes the sliver evenly over the working width of the washing apparatus and in which washing liquid 20 is advantageously fed in to convey and rinse the spinning belt.
  • the washing apparatus is divided into several stages in accordance with the basic scheme in FIG installed wash water cascade fed.
  • the liquid distributors 14 are each arranged within the first half of the individual stages according to FIG. 2.
  • the water used up in the form of strands or drops may only have a relatively low impact speed of 0.1 to 1.5 m / s on the sliver cake in order to to create no tangles in the sliver cake.
  • the liquid distributor 14 should also be as dense as possible, for example at a distance of 5 to 15 cm, be arranged above the sliver cake. For example, 1 to 10 m 3 / h of washing liquid are sprayed onto the sliver cake in one step.
  • the specific liquid load ie the amount of liquid consumed / area of sliver cake, is approximately 5 to 50 m 3 . H . m2
  • the spinning belt is pulled smooth again and conveyed through the pair of squeeze rollers 25.
  • the amount of liquid squeezed out is returned to the washing machine.
  • draw rolls 26 and 27 may Eintäfelvoriques the washed tow p innkan- ne are stored in a 28 S, provided that it is subjected to stretching, is not directly to further treatment steps, for example.
  • the washing machine is closed off by a hood 29 in order to prevent the escape of vapors.
  • the hood 29 can either be rigidly connected to the vibrating channel lower part 23 and vibrate with it, or can be separated in terms of vibrations, e.g. with the help of elastic aprons 30.
  • the wash water is conveyed from the wash water cascade with the aid of a pump 34 to the liquid distributor 14.
  • heaters are provided in the wash water cascade. These can be implemented, for example, in the form of steam-heated heating coils 35.
  • F ig. 5 shows a cross section through the wash water cascade.
  • Fresh water is fed into the wash water cascade through the feed line 36.
  • the ratio of the amount of fresh water to the amount of penetrated fibers (dry substance) is, for example, 0.5 to 3.
  • the cascade consists of containers, the partitions 37 of which are designed as overflow weirs, via which the wash water flows from stage to stage.
  • washing water 15 is conveyed to the distributor 14 by means of the pumps 34 and the washing water through which the sliver cake 6 flows is fed back into the cascade through the feed line 38.
  • the number of stages required in the wash water cascade can be, for example, 10 to 30 stages, depending on which wash result is to be achieved and the amount of fresh water / amount of fibers to be washed.
  • the wash water is enriched with solvent in counterflow to the sliver cake and leaves the wash water cascade through the pipeline 39.
  • a dry-spun spinning belt made of polyacrylonitrile with a belt weight of 20 g / m is then spun at 300 m / min. a W inventive aschapparat supplied.
  • the tow has a L ösungs- agent content of about 0.20 kg of dimethylformamide / kg dry fibers.
  • the spinning belt is laid down in a zigzag ratio of 1: 100 and traverses as a sliver cake at 3 m / min. the washing machine.
  • the washing machine is designed as a vibrating trough with a working surface of 1 m width and 12 m length and has 20 washing levels.
  • the amount of fresh water supplied is 400 kg / h; the amount of washing water consumed on the spinning belt in each stage 3 m 3 / h.
  • the wash water temperature was set at 90 ° C.
  • the washed and squeezed spinning belt has a residual solvent content of 0.01 kg dimethylformamide / kg dry fibers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)
EP80107493A 1979-12-12 1980-11-30 Procédé de lavage de filaments consécutivement à leur filage Expired EP0030670B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80107493T ATE9603T1 (de) 1979-12-12 1980-11-30 Verfahren zum waschen von chemiefasern im anschluss an das spinnen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2950014 1979-12-12
DE19792950014 DE2950014A1 (de) 1979-12-12 1979-12-12 Verfahren und vorrichtung fuer einen waschprozess im anschluss an das spinnen von chemiefasern

Publications (2)

Publication Number Publication Date
EP0030670A1 true EP0030670A1 (fr) 1981-06-24
EP0030670B1 EP0030670B1 (fr) 1984-09-26

Family

ID=6088279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107493A Expired EP0030670B1 (fr) 1979-12-12 1980-11-30 Procédé de lavage de filaments consécutivement à leur filage

Country Status (5)

Country Link
US (1) US4387476A (fr)
EP (1) EP0030670B1 (fr)
JP (1) JPS5696947A (fr)
AT (1) ATE9603T1 (fr)
DE (2) DE2950014A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143865A (en) * 1983-07-08 1985-02-20 Babcock Textilmasch Wet open-width treatment of continuous fabric

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5815868A (en) * 1997-03-27 1998-10-06 Lee; Irene Manufacturing process of longitudinally and transversely elastic and extensive fabric
DE10023391A1 (de) * 2000-05-12 2001-03-15 Lurgi Zimmer Ag Verfahren und Vorrichtung zur zugspannungsfreien Förderung von Endlosformkörpern
FR2819527B1 (fr) * 2001-01-16 2003-03-21 Rieter Perfojet Installation de production de nappes fibreuses non tissees par jets de fluide sans marque visible
KR101203000B1 (ko) * 2006-05-11 2012-11-20 코오롱인더스트리 주식회사 아라미드 필라멘트 수세 및 건조 방법
CA2885401A1 (fr) 2012-10-10 2014-04-17 Xyleco, Inc. Traitement de biomasse
PH12018500546A1 (en) 2012-10-10 2019-04-01 Xyleco Inc Equipment protecting enclosures
NZ743055A (en) 2013-03-08 2020-03-27 Xyleco Inc Equipment protecting enclosures
JP6390216B2 (ja) * 2014-07-04 2018-09-19 三菱ケミカル株式会社 アクリル繊維束の製造方法
SE544547C2 (en) * 2019-02-21 2022-07-12 Treetotextile Ab A process for wet spinning of cellulose fibers from an alkaline spin bath

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725523A (en) * 1971-08-03 1973-04-03 Du Pont Process for extracting and drawing a tow

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2621506A (en) * 1949-09-17 1952-12-16 Smith Drum And Company Wool degreasing machine
US2817227A (en) * 1950-08-07 1957-12-24 Svensktkonstsilke Ab Means for treatment of freshly spun rayon filament yarn
FR1250114A (fr) * 1960-02-15 1961-01-06 Toleries Gantoises Procédé et appareil pour le traitement en continu au large, de tissus et matières en bande
GB1189568A (en) * 1967-09-27 1970-04-29 Bruckner Trockentechnik Komman A Device for the Continuous Treatment of a Fabric Web with Liquid.
US3579679A (en) * 1968-12-10 1971-05-25 Logan Inc Jonathan Tensionless liquid treating apparatus and method
FR2087329A5 (en) * 1970-05-14 1971-12-31 Ruthner Ind Planungs Ag Continuous cleaning of metal wire
US3922738A (en) * 1971-12-13 1975-12-02 Riggs & Lombard Inc Method for treating a running fabric web
FR2282011A1 (fr) * 1974-08-12 1976-03-12 Riggs & Lombard Inc Procede et machine de traitement d'une nappe d'etoffe en mouvement
DE2444123A1 (de) * 1974-09-14 1976-03-25 Vepa Ag Vorrichtung zum nassbehandeln von spannungslos gefuehrtem gut
US4231129A (en) * 1979-03-28 1980-11-04 Cotton, Incorporated Apparatus and method for impregnating a dry fiber batt

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725523A (en) * 1971-08-03 1973-04-03 Du Pont Process for extracting and drawing a tow

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143865A (en) * 1983-07-08 1985-02-20 Babcock Textilmasch Wet open-width treatment of continuous fabric

Also Published As

Publication number Publication date
DE3069314D1 (en) 1984-10-31
JPS5696947A (en) 1981-08-05
EP0030670B1 (fr) 1984-09-26
JPH0217665B2 (fr) 1990-04-23
US4387476A (en) 1983-06-14
DE2950014A1 (de) 1981-06-19
ATE9603T1 (de) 1984-10-15

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