DD224346A1 - METHOD FOR FAULTING CELLULOSE FIBERS - Google Patents

Abstract

The invention relates to a process for dyeing cellulose fibers according to the Naphtolfaerbetechnik. The object of the invention is to make the naphtha harvesting process simpler, less time-consuming and more productive, to achieve savings in dye, auxiliary and energy consumption and to improve the working and living conditions. It is the object of the invention to achieve brilliant, level Naphtolfaerbungen with good color yield, exact color fidelity and excellent fastness properties by means of a modified, rational technical-technological process. According to the invention, the product strand to be naphtholized is pretreated in an NT short-tailed dunnage machine, primed and alkaline-salted by means of a prepared treatment liquor which can be introduced in a few seconds, and then rinsed and soaped.

Description

Title of the invention

Process for dyeing cellulose fibers

Field of application of the invention

The invention relates to a process for coloring cellulose fibers according to the Naphtolfarbetechnik.

Characteristic of known technical solutions

The Naphtolfärberei is due to the zweibadige operation, priming and development at different pH values, associated with a complex fleet change, centrifuging, intermediate drying or squeezing the naphtolisierten goods and easily brings with it the risk of unregal color failures and rubfastnesses.

In addition to the known method of dewatering by means of centrifuging or squeezing ^ after priming and the subsequent retraction into the prepared development in the winch skid, it is also common to make an intermediate rinse in alkaline salt bath with gradual draining and refilling the winch. The development must also be carried out here on a freshly prepared bath, that is, the goods must first be taken out of the reel skid.

In a further known method, the primer on the winch skid and the development takes place on the ftollenkufe. This method requires a strong squeezing device, a device for inflating the goods

Schlauch.es for the purpose of balloon formation and a Hollenkufe with several squeezing rollers at the outlet for a multiple dipping and squeezing process.

By CH-PS 587 y49 a method and an apparatus for dyeing piece goods made of cellulose fibers in strand form has become known in which the primed product is clamped over the entire width of the bobbin and wound on the reel.naß. After completion of the development bath, the goods are unwound from the reel and the dyeing is continued. This process shows the disadvantage that only small amounts can be dyed on the basis of the limited heat flowering.

With the use of also named öpezialfouiards the material is primed in tube form in a Reaktol treatment unit and stored in a Verweilbecken. The development takes place on the padder, wherein the dewatering is carried out on the first development pad. "It is then developed directly on the second padder · In a dwell is lingered until complete disengagement. The cold rinsing, hot soaps, washing and rinsing takes place again on the Reaktol treatment plant.

However, this padding method is bound to a specific textile presentation. In addition, the product has insufficient qualities, especially longitudinal tension and consequently a poor Krumpfungsverhalten on.

All methods and apparatus which have become known for the drawing method do not constitute satisfactory solutions to a profitable naphthol dyeing technique. In addition to the uneconomical workload, increased use of aids and long auxiliary times, they are of use to the worker

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associated with laborious, labor-intensive and harmful activity · They sometimes lead to odor and etching and even to the degradation of the building substance. From the often longer standing, partly reusable primer and development baths do not always result in faithful color areas.

Object of the invention

The object of the invention is to make the Naphtoifärbeverfahren easier and less time consuming and thus production-intensive and productive, to eliminate dehydration and to limit manual contact with the Dye and thereby to provide a significant improvement in working and living conditions · Furthermore, the invention aims a Saving in dye, auxiliary and energy consumption,

Presentation of the essence of invention

By eliminating the deficiencies inherent in the prior art of aer technology, the object of the invention is to achieve brilliant, eg Na.uh.to if colorations with good color yield, exact color fidelity and excellent fastness properties by means of a modified, rational technologic process.

According to the invention, the object is achieved by pretreating the product strand to be naphtholized in an NT short flotation dyeing machine, priming it and adding it to the liquor of the intermediate washing and developing liquor, additionally upstream and with a sufficiently large flow diameter to the NT short liquor jet dyeing machine

prepared standing container, salt-washed in a few seconds einschleusbaren treatment liquor and developed and then rinsed and soaped.

The pump run and the goods movement begin before the respective fleet has reached the dormant block of goods by the completely completed fleet filling process.

By the method according to the invention, product qualities in the tube as in a wide state from the primer through the development to the rinsing and sifting process can be left in the NT short-fim nozzle dyeing machine and an exceptionally good goods failure with insoluble azo pigment on the dyeing substrate can be achieved on standing bakers. earth.

embodiment

The Errindung will be illustrated below using an exemplary embodiment ·

The technological process of the process is; A Lifamat KEb ¹ M 33 -NT jet dyeing machine with the associated neck tank in the normal design as well as a large, aas capacity of the entire fleet of 2.2 - 2.5 & including, with itiihrwerk, spray tube, indirect heating and measuring scale provided approach container basis.

Fleet ratio: ι: 6

Fleet quantity: 1800 1 (softened water)

Material: 300, - kg Bw-Interlock

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Pretreatment with Lifamat HEFM

1.5 ml / 1 NaOH 48 ⁰ Be 1.5 ml / 1 H ₂ O ₂ 35%

Rinse cold at 90 ^° C. for 30 minutes

Primer in small batch container;

χ g / l primer component dissolved in

dent 1 dent. alcohol

χ 1 V / ass

Na 1 Na OH 48 ⁰ Bi

χ 1 formaldehyde

after dissolution time adding to the priming bath:

/ ml / 1 silicone-free defoamer χ ml / 1 Na OH 48 ⁰ Be

Treat for 30 min at 30 ⁰ G.

Draining the priming liquor

Preparation of alkaline salt bath in large batch container:

χ ml / 1 Na OH 48 ⁰ Be χ g / 1 Rock salt Dissolve salt well. Quickly transfer (maximum 40s) of the entire salt liquor into the Lifamat RKB ¹ M

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Treat the intermediate rinse process cold for 20 minutes

Draining the courtship fleet

Preparation of the development liquor in the large preparation tank:

χ g / l development component, highly substituted χ g / l dispersant

χ ml / 1 silage-free defoamer χ ml / 1 acetic acid

Mix well after dissolving

Fast introduction (in maximum 4Os) of the entire developmental fleet into the Lifamat RSPM 33

development process

Develop cold for 30 min (below 20 ^° C)

Discharge of the development fleet

Dishwashing and soaping process

Claims (2)

invention claim 1 ♦ A process for dyeing Zelluiosefasern after the Naphtolfärbetechnik, characterized in that the naphtolisierende goods strand in an NT Kurzflottendüsenfärbemaschine pretreated, primed and by means of a in a fleet of Salζzwischenspülens and the development fleet containing, in addition upstream and with sufficiently large pipe diameter with the NT short-frill nozzle dyeing machine prepared in preparation batch container, saizflült alkaline in a few seconds einschleusbaren Beüandiungsfiotte and developed and then rinsed and soaped. 2. The method according to item 1, characterized daiä the pump run and the goods movement begin before the respective fleet uurch uen completely completed fleet flushing process has reached the dormant block of goods.