DE1635373A1 - Process for fixing dyes in fabric printing - Google Patents

Description

Artos Dr.Ing.Meser-V / indhorst

Kbmmanditgpsclbdraff

Homburg I, MoidoRliompsweg 66

Telephone 24 83 21

Procedure for fixing

Dyes in fabric printing

The invention relates to a method of fixing dyes, for example in roller blind or film printing systems on textile webs and the like. Have been applied.

For fixing dyes on webs made of natural or synthetic fibers or mixtures of these fibers, the most diverse processes have become known and are also in use » In most cases, the process conditions are different for the individual colors or dye groups and the various too. printing materials

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so much different from each other that usually also in theirs Construction treatment devices that differ significantly from one another must be used.

For example, it is used to fix dried prints known to work with vat dyes with a certain, but not clearly defined pre-moistening of the web, the partial temperatures of the treatment agent being a maximum of 110 ° C. In the case of direct dyes and heavy dyes, higher Temperatures worked, but so far there is no pre-moistening of the goods. In the case of disperse dyes, the Treatment of dry prints in highly superheated steam up to 200 C. When fixing wet prints, preference is given to Vat dyes and reactive dyes after wet application of chemical treatment agents before steaming in steam from 130 to 1 * to ° C with certain partial drying. The list shows that for the indicated fixing methods practically four different types of dampers are used have to.

The object of the present invention is to provide the various process and treatment regulations for different web materials and to replace different dyes with a process that allows the fixing processes in one Treatment device, d. H. to be carried out according to a uniform treatment process, with one guaranteed in all cases faultless material failure.

To achieve this goal, the invention proposes a method for fixing dyes in fabric printing, in which the printed and then dried textile webs are preferably made of hygrophobic fibers from the unprinted side immediately before the heat treatment for the dye fixation, by means of moistening methods known per se a moisture content of approx. 15 % and above and for webs preferably made of hygrophilic fibers to a moisture content of approx. 25 % and above, then in this state first a heat treatment in superheated steam depending on the type of dye and depending on the type of fiber

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about 115 to 1 ^ -0 C exposed, preferably with a heat transfer power, the evaporation of the applied moisture in approx. 10 - 30 seconds, then by further heat transfer, preferably at a higher rate superheated steam depending on the type of dye and depending on Type of fiber from around 125 - 190 C with a higher one. Heat transfer performance be brought to a higher temperature and finally at this temperature in superheated steam constant temperature of a final high-temperature dwell treatment in the then dried state are subjected.

The dye developing, reacting or fixing action is doing a triple. First, there is a type of drying vapors at an almost constant product temperature of 100 C. the water vapor developing from the applied moisture. This is, so to speak, in place and in status nascendi for penetrating the pressure thickenings especially treatment effective. Then the result is with decreasing moisture content already a noticeable increase in treatment temperatures. This part of the experience is especially true for real Reactions between dye and fiber are particularly effective. Finally, the previously presented part of the procedure is included a dry high temperature dwell treatment in accordingly hochüberhitsteni water vapor of each desirable additional Ba'er connected.

The Endfixierteraperaturen are to be used during the final fixing of Direct dyes, heavy dyes, acid dyes and basic dyes preferably on cellulose fibers between

125 and 150 ° G and for disperse dyes on fully synthetic

Fibers and di- or triacetate fibers between 160 and 190 ° ß be.

Example: A fabric printed with disperse dyes a mixture of cotton fibers and polyester fibers by moistening the Büekseite to a moisture content of

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35 % and then introduced into a universal drying and drying and fixing damper with two medium circuits. In the first part of the damper, the fabric is exposed to a medium temperature of IkO C. The drying time is 20 seconds with a medium forced circulation of the medium. In the second part of the damper, the medium temperature is 170 ° C and the final fixing treatment takes place here in a dry state in kO seconds.

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Claims (2)

Claims 1.) A method for fixing dyes in fabric printing, characterized in that the printed and then dried textile webs immediately before the heat treatment for dye fixation by moistening, preferably for webs made of hygrophobic fibers to a moisture content of approx * 15 % and above and for webs preferred of hygrophilic fibers are brought to a moisture content of approx. 25 % and above, then in this state they are first exposed to a heat treatment in superheated steam, which first causes the applied moisture to evaporate, then through further heat transfer in superheated steam to the dry-setting temperature uxtdL are finally brought to this temperature in, overheated in water vapor at the appropriate temperature, a final heat treatment: in the dried state are subjected.,: 2.) Method according to claim 1. ,, characterized in that the drying heat treatments in the superheated · ¹ water vapor 'lower Tfemperatua? C'EEir - lAö ^a £} andr the dry heat treatments are carried out in superheated steam at a higher temperature (125 - 190 ^α Ο and indeed "for- bridge with direct dyes b ^ mrzKEgt; stoif; ZeIlaäL © se € aseirtii between 125 and I5Q ⁰ C "ιοί nit: Öispersionsiarfetaf f ent bevjorzagt on synthetic fibers' un ^ S ^ ^ aeretsrfefasse re · ZÄtscite" and löö: 19Q ° C. 3 *) procedure according to the statement; % and, 2, dadureii gJe ^ Bnzeifö & net that the WanBeb-ehandlung ia = u ^ erhi, fcziiiem: -
the on getbrachvfcen; F «üiGifeei; gken & fc wftli eaxtem aosEetenr carries« g «itei, s? Buiitgi erfblJEgfe that dates» F ^ ette & bfgieedtfe: £ m cm * Iff - 3Q seconds.