EP0632155A1 - Verfahren und Vorrichtung zum kontinuierlichen Mercerisieren von Polyesterfasern - Google Patents

Verfahren und Vorrichtung zum kontinuierlichen Mercerisieren von Polyesterfasern Download PDF

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Publication number
EP0632155A1
EP0632155A1 EP94108026A EP94108026A EP0632155A1 EP 0632155 A1 EP0632155 A1 EP 0632155A1 EP 94108026 A EP94108026 A EP 94108026A EP 94108026 A EP94108026 A EP 94108026A EP 0632155 A1 EP0632155 A1 EP 0632155A1
Authority
EP
European Patent Office
Prior art keywords
assembly
threads
tank
plant
mercerisation
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.)
Withdrawn
Application number
EP94108026A
Other languages
English (en)
French (fr)
Inventor
Fabio Lancerotto
Ambrogio Caccia Dominioni
Luigi Minto
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.)
GESMA - Gestione Sviluppo Medie Aziende SpA
Original Assignee
GESMA - Gestione Sviluppo Medie Aziende SpA
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 GESMA - Gestione Sviluppo Medie Aziende SpA filed Critical GESMA - Gestione Sviluppo Medie Aziende SpA
Publication of EP0632155A1 publication Critical patent/EP0632155A1/de
Withdrawn legal-status Critical Current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
    • D06B7/04—Mercerising, e.g. lustring by mercerising of yarns, threads or filaments

Definitions

  • This invention concerns a method for the continuous mercerisation of polyester fibres, as set forth in the main claim.
  • the invention concerns a method suitable to carry out mercerisation treatment of a plurality of polyester fibres being unwound parallel and continuously from at least one feeder beam.
  • the invention concerns also a plant which employs the above method.
  • the state of the art covers a plurality of methods and devices for mercerisation of woven fabrics and threads, especially consisting of cotton.
  • mercerisation is a treatment with caustic soda applied, for instance, to threads, and the description that follows will refer to threads, which are subjected to a suitable tension to ensure that they acquire a lustre like that of silk.
  • the threads to be used for knitwear made by hand or machine, for shirts, embroidery and sewing threads undergo mercerisation.
  • Polyester fibres instead, are very shiny and smooth and therefore sometimes have to be dulled. Moreover, where the same dye is used, mercerised fibres are coloured much more intensely than non-mercerised fibres, and this leads to a smaller consumption of dyestuffs in the dyehouse.
  • This method besides being of a discontinuous type, entails the problem that all the fibres forming the fabric undergo that bath of caustic soda.
  • the purpose of the invention is to provide a method for the continuous mercerisation of polyester fibres on an industrial scale with limited costs and with technological results of a high quality.
  • the method according to the invention arranges to process continuously a plurality of independent threads consisting of polyester fibres and being unwound parallel to one another from at least one feeder beam.
  • the plurality of polyester threads undergoes substantially six steps of mercerisation treatment:
  • the threads Downstream of the second and final drying operation the threads are taken up advantageously in separate groups on at least one take-up beam but advantageously on a plurality of take-up beams of smaller sizes than the feeder beam or beams.
  • the above mercerisation steps are carried out in a plurality of tanks which can be moved advantageously to assist the operations of cleaning, maintenance and replacement.
  • the tanks include means to facilitate the passage and insertion of the threads in the operational assemblies arranged within the tanks themselves.
  • each group of tanks or, rather, each tank is equipped with its own drive and control means, which are governed by a central data processing unit that sets the various processing parameters from time to time.
  • the plant is equipped with a system to monitor all the physical magnitudes involved in the treatment, which are fed to the central data processing unit so as to optimise each operational step, especially from the technological and energy point of view.
  • the invention includes modular elements which enable the fabrication costs to be reduced and the plant to be personalised to suit customers' requirements.
  • the threads can be tied together crosswise to their direction of feed in the plant at pre-set intervals; this solution ensures that each thread is fed along the whole path of the treatment even if there are any breakages.
  • the connections can be removed before the threads are wound on the take-up beams.
  • the reference number 10 denotes generally a method for the continuous mercerisation of threads of polyester fibres being unwound from at least one feeder beam 12.
  • the method 10 arranges that the threads 11 being unwound at a speed of about 75 metres per minute undergo the following operational steps in succession:
  • Figs.2 and 3 show diagrammatically the lay-out of a plant 20 for the continuous mercerisation of threads 11 of polyester fibres according to the invention.
  • the plant 20 is fed by a plurality of threads 11 being unwound from at least one beam 12.
  • the feed consists of two beams 112 and 212 to feed separately two plants 120-220 having an identical lay-out and facing each other.
  • the speed of unwinding of the threads 11 from the beam 12 can be 75 metres per minute or more whilst ensuring at the same time the required level of quality of the product processed.
  • the threads 11 unwound from the beam 12 are fed by a feeder assembly 21 consisting of two beams 112-212 placed side by side in this case.
  • the threads 11 are delivered by the feeder assembly 21 to an assembly 29 which in this case consists of two tanks 22 for impregnation of the threads 11 in a caustic soda solution at 32° Baumé.
  • a plurality of tanks 22 positioned also in assemblies downstream of the feeder assembly 21 is employed in the mercerisation plant 20.
  • These tanks 22 are advantageously of the type disclosed in EP-A-90123294.2, and a tank 22 of this type is shown as an example in Fig.4.
  • the tank 22 in this case includes a container 23 to hold the treatment liquid, an upper transverse intake roll 24 and an upper transverse output roll 24, a pair of lower transverse rolls 25 positioned at the bottom of the container 23 and an intermediate transmission roll 26.
  • Pressure means 27 may be included to apply pressure on the threads 11 at least on the upper rolls 24.
  • Actuation means 28 to drive the rolls are positioned above the tank 22 and may cooperate with one single tank 22 or with assemblies of tanks.
  • the intermediate transmission roll 26 is equipped advantageously with its own motor able to move the transmission roll 26 crosswise to the direction of feed of the threads 11; the purpose of this is to be able to ensure correct positioning of the plurality of threads 11 along their feed path through the plant 30, such positioning of the threads 11 being checked by control means such as photoelectric cells cooperating with the motor of the intermediate transmission roll 26.
  • Each tank 22 is arranged in the plant 20 with the ability to displace the container 23 so as to free the rolls 24-25-26 and make possible a ready insertion and passage of the threads 11 during operations to change batches or for other necessary actions.
  • the containers 23 in Fig.4 can be lowered to the position shown with lines of dashes.
  • the temperature of the impregnation bath is kept at about 70-75°C, while the metering and heating of the caustic soda can be carried out and controlled in a supplementary container.
  • the quantity and temperature of the caustic soda solution and also the metering of the caustic soda can be controlled advantageously by suitable sensors placed in the tanks; these sensors are connected to centralised control means which manage the operations automatically. This feature forms part of every other operational assembly described hereinafter.
  • the solution for topping up the tanks 22 of the impregnation assembly 29 can be prepared in a separate tank and heated by heat exchangers independently or with conservation of heat.
  • the threads 11 in the lay-out shown take about 6 seconds to pass through the whole impregnation assembly 29 according to trials conducted by the present applicants.
  • the threads 11 are fed from the impregnation assembly 29 into a first drying assembly 30 consisting of a first oven 31a, in which the threads 11 undergo a series of passes between upper rolls 32 and lower rolls 33.
  • the drying may be substantially complete or be partial.
  • the first oven 31a will advantageously be of a type with a forced circulation of air heated with a submerged combustion system or another known heating system. In the above conditions the first drying step 14 will last for about 48 seconds.
  • the first drying step 14 is especially important for the results of the mercerisation method according to the invention.
  • the threads 11 leaving the first drying assembly 30 are fed to a steaming assembly 34, in which the threads 11 undergo a series of passes between upper rolls 32 and lower rolls 33 and are subjected to a current of steam at a temperature of about 100°C.
  • the threads 11 leaving the steaming assembly 34 are fed into a hot-water washing assembly 35 consisting of two tanks 22 of the type described above in this case.
  • the water in the hot-water washing assembly 35 is kept at a temperature of about 70-80°C and the hot-water washing step 16 lasts for about 6 seconds.
  • the threads 11 then undergo a neutralisation step 17 performed in a neutralisation assembly 36 consisting of two tanks 22 holding acetic acid at a temperature of about 20°C. This step of neutralising 17 the threads 11 lasts for about 6 seconds in this case.
  • a cold water rinsing assembly 37 consisting of two groups, each of two tanks 22, containing water at a temperature of about 20°C.
  • the cold water rinsing step 18 lasts for about 12 seconds in this case.
  • the tanks 22 of the hot-water washing assembly 35 and cold-water rinsing assembly 37 are equipped with inlets and outlets for water, which can be delivered continuously in the opposite direction to the feed of the threads 11 to be processed.
  • the water flows advantageously into each of the washing and rinsing assemblies 35-37 from one tank into another through overflow pipes.
  • the water collected at the outlets of the washing and rinsing assemblies 35-37 can be treated to recover caustic soda by evaporation of the water.
  • the thermal energy made available in the treatment can be employed to heat water used in the preceding steps.
  • the threads 11 are fed from the cold water rinsing assembly 37 to a second and final drying assembly 38, which consists of a second oven 31b in which the threads 11 undergo a series of passes between upper rolls 32 and lower rolls 33.
  • the second oven 31b may advantageously be of the same type as the first oven 31a or be replaced by other known heating systems.
  • the threads 11 in the second and final drying step 19 are subjected to a current of hot air for about 48 seconds.
  • the threads 11 leaving the second and final drying assembly 38 are taken up on one beam or advantageously on a plurality of small take-up beams 39, each of which holds a submultiple of the number of threads 11 held on the feeder beam 12 or feeder beams 112-212.
  • These small take-up beams 39 are used to feed thereafter suitable machines located downstream.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
EP94108026A 1993-06-30 1994-05-25 Verfahren und Vorrichtung zum kontinuierlichen Mercerisieren von Polyesterfasern Withdrawn EP0632155A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUD930130 1993-06-30
ITUD930130A IT1262155B (it) 1993-06-30 1993-06-30 Procedimento di mercerizzo in continuo di fibre di poliestere e relativo impianto

Publications (1)

Publication Number Publication Date
EP0632155A1 true EP0632155A1 (de) 1995-01-04

Family

ID=11421329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94108026A Withdrawn EP0632155A1 (de) 1993-06-30 1994-05-25 Verfahren und Vorrichtung zum kontinuierlichen Mercerisieren von Polyesterfasern

Country Status (2)

Country Link
EP (1) EP0632155A1 (de)
IT (1) IT1262155B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014071677A1 (zh) * 2012-11-12 2014-05-15 无锡市天然绿色纤维科技有限公司 一种辫子连续丝光机及其加工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1133899A (en) * 1966-04-01 1968-11-20 Vepa Ag Process and device for mercerising cotton yarn
FR2024796A7 (en) * 1968-10-25 1970-09-04 Vepa Ag Textile fabric mercerisation
GB2077783A (en) * 1980-06-03 1981-12-23 Ivanovsky Nii Khlopchatobum Mercerising cloth
EP0489191A1 (de) * 1990-12-05 1992-06-10 GESMA - Gestione Sviluppo Medie Aziende SpA Verfahren und Vorrichtung zum kontinuierlichen Mercerisieren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1133899A (en) * 1966-04-01 1968-11-20 Vepa Ag Process and device for mercerising cotton yarn
FR2024796A7 (en) * 1968-10-25 1970-09-04 Vepa Ag Textile fabric mercerisation
GB2077783A (en) * 1980-06-03 1981-12-23 Ivanovsky Nii Khlopchatobum Mercerising cloth
EP0489191A1 (de) * 1990-12-05 1992-06-10 GESMA - Gestione Sviluppo Medie Aziende SpA Verfahren und Vorrichtung zum kontinuierlichen Mercerisieren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014071677A1 (zh) * 2012-11-12 2014-05-15 无锡市天然绿色纤维科技有限公司 一种辫子连续丝光机及其加工方法

Also Published As

Publication number Publication date
IT1262155B (it) 1996-06-19
ITUD930130A0 (it) 1993-06-30
ITUD930130A1 (it) 1994-12-30

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