EP0566832B1 - Verfahren und Vorrichtung zum Mercerisieren - Google Patents

Verfahren und Vorrichtung zum Mercerisieren Download PDF

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Publication number
EP0566832B1
EP0566832B1 EP93102088A EP93102088A EP0566832B1 EP 0566832 B1 EP0566832 B1 EP 0566832B1 EP 93102088 A EP93102088 A EP 93102088A EP 93102088 A EP93102088 A EP 93102088A EP 0566832 B1 EP0566832 B1 EP 0566832B1
Authority
EP
European Patent Office
Prior art keywords
alkaline solution
goods
fabric web
roller
field
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
EP93102088A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0566832A3 (enrdf_load_stackoverflow
EP0566832A2 (de
Inventor
Lothar Depenbrock
Werner Fritzsche
Hartmut Hellwich
Claus Tischbein
Harke Claus Paulsen
Rolf Sierks
Armin Steudel
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.)
Babcock Textilmaschinen GmbH
Original Assignee
Babcock Textilmaschinen GmbH
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 Babcock Textilmaschinen GmbH filed Critical Babcock Textilmaschinen GmbH
Publication of EP0566832A2 publication Critical patent/EP0566832A2/de
Publication of EP0566832A3 publication Critical patent/EP0566832A3/xx
Application granted granted Critical
Publication of EP0566832B1 publication Critical patent/EP0566832B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D06B7/00—Mercerising, e.g. lustring by mercerising
    • D06B7/08—Mercerising, e.g. lustring by mercerising of fabrics of indefinite length
    • 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
    • D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
    • D06B23/24—Means for regulating the amount of treating material picked up by the textile material during its treatment
    • D06B23/26—Means for regulating the amount of treating material picked up by the textile material during its treatment in response to a test conducted on the textile material

Definitions

  • the invention relates to a method for the mercerization of textile webs according to the preamble of patent claim 1 and a system suitable for carrying out the method according to the preamble of patent claim 4.
  • the web is impregnated in a first stage with an alkali solution, usually with sodium hydroxide solution. For example, it is sprayed with the lye or passed through a lye bath.
  • the duration of the treatment is such that the lye completely wets the goods with a predetermined concentration.
  • the product wetted with the lye has a strong tendency to shrink.
  • a bound guidance of the goods is necessary.
  • After the goods have been completely wetted they are fed to a second stage via a squeezer, in which the lye is removed from the goods again.
  • the stabilization takes place in a first sub-stage, which the goods also pass through in tied management.
  • the alkali is washed out, for example by spraying water, to such an extent that the goods then no longer shrink. This produces a dilute lye.
  • the goods are then freed from the remaining residual liquor in at least one further sub-stage in an unbound state by steam leaching and / or by washing.
  • the goods are then subjected to an alkali in the outlet-side half of the mercerizing field, the concentration of which is lower than the concentration of the strong alkali, but higher than the target concentration.
  • the mass transfer, with which the water already contained in the goods is replaced by lye, is accelerated by the high concentration gradient between the lye and the web.
  • EP-A1-0 339 438 describes a so-called addition method. Strong liquor is applied to the damp, mechanically dewatered material web with a platen roller. It penetrates the goods through a subsequent dwell in the goods and adds to the moisture already present in the goods so that the desired target concentration is established.
  • the document emphasizes that the free path which the material web travels from the impregnation to the first roller of the dwell path in the unbound state is shortened.
  • the invention has for its object to improve a method according to the preamble of claim 1, so that exactly a uniform loading density is maintained with reduced alkali consumption.
  • a second task is to create a mercerizing system which is particularly suitable for carrying out the method.
  • the first object is achieved by the characterizing features of claim 1.
  • the reduction of the alkali consumption is achieved in that a part of the weak liquor, which occurs especially when stabilizing, is used according to the first feature of the label to apply a certain amount of alkali to the goods even before the starch liquor is applied.
  • the amount of starch liquor that has to be added in order to achieve the desired loading density is reduced accordingly.
  • the second object is achieved by the characterizing features of claim 4.
  • the features of claim 5 additionally achieve that the material web is transferred from the main impregnation field into the subsequent field without leaving the bound guide.
  • the mercerization system consists of several fields which are continuously passed through by the web to be treated, namely a pre-impregnation field 1, a main impregnation field 2, a penetration field 3, a dwell field 4, a stabilization field 5 and a washing field 6.
  • the pre-impregnation field 1 comprises a roller skid compartment of conventional design. It is divided into a number of chambers 8 in the floor area by a plurality of partition bulkheads.
  • the separating bulkheads 7 are alternately provided with passage openings which are not visible in the drawing, so that the weak liquor supplied on the outlet side flows through the individual chambers 8 transversely to the direction of flow of the goods and is guided zigzag from chamber to chamber.
  • the chamber 8a adjacent to the goods inlet is delimited by an overflow weir 9 which determines the fill level.
  • immersion rollers 10 are accommodated, to which upper rollers 11 are assigned.
  • the web is alternately guided in the form of vertical loops over the dipping rollers 10 and the top rollers 11.
  • a pendulum roller 12 for voltage regulation is arranged on the outlet side. Behind the roller skid compartment, the material web reaches a vertical crushing unit 14 via an spreader roller 13 and from there via a further pendulum roller to the main impregnation field 2.
  • the main impregnation field 2 comprises a horizontal crushing unit, consisting of two rollers 15, 16, over which distributor channels 17, 18 are attached for the alkali.
  • the bottom under the rollers 15, 16 is designed as a collecting trough. It is provided at its deepest point with a drain 19 which leads to a pump template 20.
  • a conductivity measuring device 24 is arranged for measuring the loading density of the incoming pre-impregnated goods.
  • a plurality of lower rollers 25, 26, 27 are arranged at short intervals, the axes of which lie at the same height and parallel to the axes of the rollers 15, 16.
  • Upper rollers 28, 29 are arranged in a gap with the lower rollers, so that the upper rollers 28, 29 are supported on two lower rollers each.
  • an upper roller 30 is arranged, which is supported on the one hand on the roller 16 of the horizontal crushing unit, on the other hand on the lower roller 25 on the inlet side, and thus ensures the transition of the goods from the main impregnation zone 2 to the penetration zone 3 in a bound guide.
  • No devices for supplying liquid are normally provided in the penetration field 3.
  • Under the lower rollers 25, 26, 27 there is a collecting trough 35 with drain 36, which is led to a pump receiver 37.
  • the dwell field 4 comprises a similar roller arrangement, which directly adjoins the roller arrangement of the penetration field 3.
  • the first two lower rolls of the dwell field 4 are cooled.
  • a vertical crushing unit 38 is arranged at its outlet. Devices for supplying liquid are not provided in the dwell field 4. From the bottom designed as a collecting trough, a drain 39 leads to the pump receiver 37.
  • the stabilizing field 5 shown separately in FIG. 2 is configured with respect to the roller arrangement analogous to the two previous fields, it being understood that the number of bottom and top rollers in the individual fields can be different, depending on the desired dwell times.
  • the stabilizing field 5 is separated from the subsequent washing field 6 by a vertical crushing unit 40.
  • a spray tube 41 is arranged directly in front of the vertical crushing unit 40 and is directed into the roller pack of the vertical crushing unit 40.
  • the bottom of the stabilizing field 5 is designed as a collecting trough 42, which is divided by transverse dividing plates 43, 44. Accordingly, the stabilizing field 5 consists of the sections 45, 46, 47.
  • the outlet-side section 47 also includes the vertical crushing unit 40. Each section has its own washing liquid circuit.
  • the washing liquid circuit of section 47 comprises an outlet 48, a pump receiver 49, a pump 50, a circulation line 51 and a spray pipe 52 which is arranged in an intermediate space between two top rollers 53, 54.
  • the washing liquid circuits of the sections 45, 46 are constructed analogously.
  • the pump templates 55, 56, 49 are arranged similar to the steps of a staircase rising in the direction of travel and separated from one another by overflow plates 57, 58, so that the liquid flows from step to step in a countercurrent to the direction of travel of the web.
  • a branch line 60 extends from the circulation line 59 of the inlet-side section 45 and leads to the pump receiver 37.
  • the subsequent washing area 6 has no particular reference to the invention and therefore does not require a detailed description. It should only be noted that in the washing area 6, bound goods guidance is no longer required.
  • a vertical crushing unit 61 is arranged behind the washing area 6. An outflow opens into a pump reservoir 62. The associated pump 63 is connected on the pressure side by a line 64 to the spray tube 41 of the stabilizing field 5.
  • the material web runs dry into the pre-impregnation field 1 and is guided therein over a number of guide rollers which are immersed in a lye bath made of dilute weak lye.
  • the weak liquor has a concentration of about 80 - 130 g / l.
  • the product is soaked in the weak liquor and then squeezed through the vertical squeeze mechanism 14 to about 70% moisture (% by weight of liquid, based on the weight of the dry product).
  • the loading density is around 70 - 100 g / kg (g NaOH per kg goods).
  • the goods already enter pre-impregnation field 1 with a moisture content of about 70%.
  • This moisture is displaced by weak liquor as it passes through the caustic bath of the pre-impregnation field 1.
  • the squeeze 14 the moisture content again reduced to 70%.
  • the goods therefore leave the pre-impregnation field 1 with the same moisture with which they entered.
  • the water originally present it absorbed weak liquor.
  • the loading density corresponds approximately to the process variant described first.
  • Strong liquor is applied to the pre-impregnated goods in the gusset between the rollers 15, 16 on both sides.
  • the concentration of the strong liquor is around 400 - 500 g / l.
  • the starch liquor is heated to the temperature of 50-80 ° C. required for the hot mercerization.
  • the rolls 15, 16 squeeze the goods to a moisture level which is significantly higher than the moisture level remaining behind the vertical crushing unit 14. It therefore leaves the main impregnation zone 2 with a 30 - 40% higher humidity, e.g. with a humidity of approx. 100%.
  • the desired amount of NaOH is applied, so that the goods leave the main impregnation zone 2 e.g. has a NaOH loading density of 250-300 g / kg.
  • the goods subsequently enter the penetration zone 3, where the starch liquor applied to the goods penetrates the goods and mixes with the weak liquor, which has already been introduced into the goods in the pre-impregnation zone 1.
  • No new alkali is applied to the goods in the penetration field 3. In this field, therefore, no alkali cycle is generally required.
  • the outlet 36 only serves to drain off any dripping liquid, the amount of which is generally very small. In the event, however, that noticeable amounts of lye drip off the goods, a lye circuit, not shown in the drawing, can be provided. It only serves to return the drained liquid to the goods so that the loading density remains unchanged. The temperature of the goods remains almost constant in the penetration field.
  • the goods also remain in the dwell area 4 without contact with liquid.
  • the moisture is reduced in the squeezer 38 as much as is possible in the swollen state of the goods, i.e. about 80 - 90%.
  • the dripping liquid flows to the pump receiver 37.
  • the loading density of the goods is reduced to about 50-70 g / kg by spraying them repeatedly with washing liquid in countercurrent. On the one hand, this results in a good washing effect and, on the other hand, a relatively high concentration of the weak liquor that flows into the pump receiver 37.
  • the entire route from the main impregnation field 2 to the exit of the stabilization field 5 is traversed by the goods, which tends to shrink due to the high loading density, e.g. - As shown in Figures 1 and 2 - along a meandering path over closely adjacent rollers.
  • the goods can also be transported on the entire route or on partial routes, e.g. in the stabilizing field 5, bound between tension chains.
  • the goods are passed through the washing area unbound.
  • the goods are washed out with hot water so that a residual load density of less than 0.5 g / kg results.
  • Flowing washing liquid is fed to the stabilizing field 5.
  • the alkali circuits of the individual fields are linked to one another.
  • the dilute alkali accumulating in the stabilizing field 5 the alkali squeezed off in the vertical squeezing unit 38 and possibly a very small amount of drained alkali from the penetration field 3 are collected.
  • a partial amount of the alkali thus formed is fed to the pre-impregnation field 1 as a weak alkali by a pump 65 via a line 66.
  • the amount of weak liquor supplied is controlled by a level controller so that the liquor level in the pre-impregnation field 1 remains constant. In this way, exactly the amount of weak liquor replaced by the Goods are picked up.
  • the amount of weak liquor supplied is controlled by means of a flow controller so that the required concentration is not undercut.
  • liquor depleted in NaOH runs off via an overflow 67.
  • the strong liquor is circulated and continuously supplemented by metered addition of highly concentrated lye and weak lye.
  • the admixture takes place via a static mixer 68, which is connected on the output side to the pump supply 20.
  • Highly concentrated sodium hydroxide solution preferably at a concentration of about 700 g / l, is fed to it from a storage tank 69 via a line 70 on the inlet side.
  • weak liquor is fed to him from the pump receiver 37 via a line 71 and strong liquor via a line 72, which is branched off from the line 21 of the pump circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
EP93102088A 1992-04-21 1993-02-11 Verfahren und Vorrichtung zum Mercerisieren Expired - Lifetime EP0566832B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4213127A DE4213127C1 (enrdf_load_stackoverflow) 1992-04-21 1992-04-21
DE4213127 1992-04-21

Publications (3)

Publication Number Publication Date
EP0566832A2 EP0566832A2 (de) 1993-10-27
EP0566832A3 EP0566832A3 (enrdf_load_stackoverflow) 1994-01-05
EP0566832B1 true EP0566832B1 (de) 1995-08-30

Family

ID=6457179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93102088A Expired - Lifetime EP0566832B1 (de) 1992-04-21 1993-02-11 Verfahren und Vorrichtung zum Mercerisieren

Country Status (2)

Country Link
EP (1) EP0566832B1 (enrdf_load_stackoverflow)
DE (2) DE4213127C1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4321139A1 (de) * 1993-06-25 1995-01-05 Mayser Gmbh & Co Verfahren und Vorrichtung zur Umformung von textilen Flächengebilden
DE19531663C2 (de) * 1995-08-29 1997-08-14 Kuesters Zittauer Maschf Gmbh Vorrichtung zum Mercerisieren einer textilen Warenbahn
DE19813237C2 (de) * 1998-03-26 2000-05-04 Titv Greiz Verfahren und Vorrichtung zur kontinuierlichen Alkalibehandlung
ITMI20121361A1 (it) * 2012-08-01 2014-02-02 Reggiani Macchine Spa Macchina per la mercerizzazione di filati

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1460463C3 (de) * 1965-02-11 1974-03-14 Fa. Hermann Windel, 4814 Windelsbleiche Verfahren zur Rückgewinnung von Chemikalien und zur Verbesserung des Austausches zurückgeführter Chemikalien bei der Naßbehandlung von Textilgeweben und Mercerisiermaschine zum Ausüben des Verfahrens
DE3341272A1 (de) * 1983-11-15 1985-05-23 Babcock Textilmaschinen GmbH, 2105 Seevetal Verfahren und anlage zum abkochen von textilen warenbahnen oder dergl.
DD267636A3 (de) * 1987-06-15 1989-05-10 Robur Werke Zittau Veb Verfahren zum mercerisieren von textilen stoffbahnen
DE3868295D1 (de) * 1987-06-15 1992-03-19 Zittauer Maschinenfabrik Gmbh Verfahren zum mercerisieren von textilen stoffbahnen.
EP0339438A1 (de) * 1988-04-28 1989-11-02 Veb Robur-Werke Zittau Verfahren und Vorrichtung zum Mercerisieren von textilen Stoffbahnen oder Fadenscharen

Also Published As

Publication number Publication date
DE4213127C1 (enrdf_load_stackoverflow) 1993-07-01
EP0566832A3 (enrdf_load_stackoverflow) 1994-01-05
DE59300520D1 (de) 1995-10-05
EP0566832A2 (de) 1993-10-27

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