EP0030670B1 - Verfahren zum Waschen von Chemiefasern im Anschluss an das Spinnen - Google Patents

Verfahren zum Waschen von Chemiefasern im Anschluss an das Spinnen Download PDF

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Publication number
EP0030670B1
EP0030670B1 EP80107493A EP80107493A EP0030670B1 EP 0030670 B1 EP0030670 B1 EP 0030670B1 EP 80107493 A EP80107493 A EP 80107493A EP 80107493 A EP80107493 A EP 80107493A EP 0030670 B1 EP0030670 B1 EP 0030670B1
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EP
European Patent Office
Prior art keywords
washing
spinning
tow
stage
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80107493A
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German (de)
English (en)
French (fr)
Other versions
EP0030670A1 (de
Inventor
Michael Dr. Bueb
Robert Ing. grad. Brück
Prof. Dr. Muschelknautz
Dieter Dipl.-Ing. Paulini
Karlheinz Dr. Feltgen
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Bayer AG
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Bayer AG
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Publication date
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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(B1) "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/de
Application granted granted Critical
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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 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. B. Dimethylformamide. This solvent is usually largely removed from the fibers using an extraction process with water.
  • solvent e.g. B. Dimethylformamide
  • the slivers are usually combined from several spinning shafts to form a spinning belt and at speeds between 200 and 400 m / min. placed in a spinning can.
  • Several such spinning belts are then pulled out again from adjacent spinning cans, combined into a larger belt and at a speed of 20 to 70 m / min. a so-called aftertreatment line in which the slivers are subjected to various aftertreatment steps.
  • 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 guided 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 2515410 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.
  • the spinning belt does not accelerate again to the spinning speed, is smoothed out, and is deposited or further processed in this state, for. B. 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, there is no targeted, multi-stage countercurrent flow of washing water and sliver, so that the consumption of fresh water is too high for reasons of economy and the solvent removal is incomplete. Furthermore, the initially formed sliver cake is no longer dissolved at the end of the washing device, i. H. the compressed or folded fiber ribbon does not straighten again.
  • the washing liquid is sprayed up and a vibrating trough operated with unbalance drive or electromagnetic excitation is used as the transport base, the bottom of which consists of perforated plates, sieve fabrics or slotted plates with 10 to 50% free cross-sectional area and which has permeable or impermeable side walls, depending on the occupancy density.
  • the spinning belt is preferably pulled smooth again after leaving the washing section and dewatered with the aid of a squeezing device, e.g. B. by simply draining or by mechanical drainage devices, e.g. B. air flow devices or vacuum chambers, below the transport device.
  • a squeezing device e.g. B. by simply draining or by mechanical drainage devices, e.g. B. air flow devices or vacuum chambers, below the transport device.
  • the washed and dewatered spinning belt can first be placed in a spinning can and removed therefrom in a later step and further post-treatment steps such as e.g. B. stretching, drying, crimping, etc. are supplied.
  • further post-treatment steps such as e.g. B. stretching, drying, crimping, etc. are supplied.
  • the washed and dewatered spinning belt can immediately and continuously further post-treatment steps such. B. subjected to a stretching process.
  • 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. Due to the known countercurrent flow in several stages, the specific amount of fresh water required is relatively low. With the aid of the method according to the invention, 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.
  • Fig. 1 shows purely schematically a countercurrent washing process in a very simple form.
  • 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 design and dimensions e.g. B. the length of such a washing machine, and the selected process parameters, such as. B. proportions, residence times, etc., 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.
  • washing liquid in accordance with the diagram in FIG. 2.
  • the sliver cake 6 is transported on a liquid-permeable vibrating trough 8 through several washing stages connected in series. Within each stage, washing water is sprayed onto the sliver cake from a liquid distributor 14. The washing water 9 seeps through the sliver cake and through the base 8 and drips into the template 10. From this template, the washing liquid is pumped back to the liquid distributor 14 with a pump 12.
  • 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.
  • the amount of entrained liquid can be further reduced to, for example, 0.4 to 2 kg liquid / 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 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 matter).
  • the speed of the fiber cake is, for example, 0.5 to 5 m / min.
  • the dwell time in one step is, for example, 5 to 300 s.
  • the wash water temperature is between 60 and 100 ° C.
  • FIG. 3 shows 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 rollers 17 and the washing apparatus 18 at a speed of 100 to 400 m / min. promoted.
  • the washing machine consists of a vibrating trough that is electromagnetic Vibrators 19 is excited, and which the fiber cake with 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 spinning belt is placed in the 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 according to the basic scheme in FIG. 2.
  • Washing liquid 15 is sprayed onto the fiber cake via liquid distributors 14 in the form of showers or nozzles, it seeps through and is separated by troughs 23 and drainage nozzles 24, for example according to 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. Therefore, the liquid distributor 14 should also be as dense as possible, e.g. B. at a distance of 5 to 15 cm above the sliver cake.
  • washing liquid 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. M 2) .
  • 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.
  • the washed spun cord can be placed in a spinning can 28, provided that no further treatment steps such as e.g. B. a drawing is subjected.
  • FIG. 29 A cross section through the washing apparatus and the washing water cascade is shown in FIG.
  • the washer is closed by a hood 29 to prevent vapors from escaping.
  • 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. B. with the help of elastic aprons 30th
  • 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.
  • Fig. 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 fibers passed through (dry substance) is, for example, 0.5 to 3.
  • the cascade consists of containers, the partition walls 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 the wash result 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.
  • the spinning belt has a solvent content of approx. 0.20 kg 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 Verfahren zum Waschen von Chemiefasern im Anschluss an das Spinnen Expired EP0030670B1 (de)

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 EP0030670A1 (de) 1981-06-24
EP0030670B1 true EP0030670B1 (de) 1984-09-26

Family

ID=6088279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107493A Expired EP0030670B1 (de) 1979-12-12 1980-11-30 Verfahren zum Waschen von Chemiefasern im Anschluss an das Spinnen

Country Status (5)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324650A1 (de) * 1983-07-08 1985-01-17 Babcock Textilmaschinen GmbH, 2105 Seevetal Verfahren und vorrichtung zur nassbehandlung von breitgefuehrten laufenden warenbahnen
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
NZ740766A (en) 2012-10-10 2019-12-20 Xyleco Inc Treating biomass
CU24372B1 (es) 2012-10-10 2018-11-06 Xyleco Inc Procesamiento de biomasa
NZ706072A (en) 2013-03-08 2018-12-21 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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.
FR2087329A5 (en) * 1970-05-14 1971-12-31 Ruthner Ind Planungs Ag Continuous cleaning of metal wire
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

Family Cites Families (6)

* 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
US3579679A (en) * 1968-12-10 1971-05-25 Logan Inc Jonathan Tensionless liquid treating apparatus and method
US3725523A (en) * 1971-08-03 1973-04-03 Du Pont Process for extracting and drawing a tow
US3922738A (en) * 1971-12-13 1975-12-02 Riggs & Lombard Inc Method for treating a running fabric web
US4231129A (en) * 1979-03-28 1980-11-04 Cotton, Incorporated Apparatus and method for impregnating a dry fiber batt

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.
FR2087329A5 (en) * 1970-05-14 1971-12-31 Ruthner Ind Planungs Ag Continuous cleaning of metal wire
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

Also Published As

Publication number Publication date
ATE9603T1 (de) 1984-10-15
US4387476A (en) 1983-06-14
JPS5696947A (en) 1981-08-05
JPH0217665B2 (enrdf_load_stackoverflow) 1990-04-23
DE2950014A1 (de) 1981-06-19
EP0030670A1 (de) 1981-06-24
DE3069314D1 (en) 1984-10-31

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