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Abstract
In recent years, there has been some efforts to study the technical feasibility of pigment dyeing especially for modified textiles to minimize water pollution, to reduce dye cost as well as to enhance performance and dyeing properties.
The main target of the present thesis was to carry out research and development work in the area of pigment dyeing and resin finishing of cellulose-based fabrics in one step by padding technique,as well as to find out the appropriate dyeing formulations, auxiliaries as well as conditions for attaining desirable properties.
Given below a summary of these studies:
1- For a given set of pigment dyeing/resin finishing, the proper formulations and conditions for attaining higher depth of color along with better fastness and fabric resiliency properties are:
increasing TEA concentration up to 20 g/l.
- increasing the binder concentration up to 60 g/1.
increasing the fixing agent concentration up to 40 g/1.
increasing NH,Cl concentration up to 5 g/1.
increasing the pigment concentration up to 20 g/1.
increasing the softener concentration up to 20 g/l, and/or
-curing at 180°C for 2 min.
2. The extent of dyeing as well as crosslinking is determined by: the nature of substrate, i.c. Viscose > cotton > linen.
the type of binder, i.e., Printofix” MTB > Helizarine ET 95 >Imperon N82 > None.
the kind of fixing/crosslinking agent, i.e. Fixapret CPN > Arkofix NG-ET> None.
the type of softener, i.c. Solusoft® WA 90-ET > Leomin® NI > None.
3- Extent of coloration as well as fastness properties of the obtained pigment dyeings are governed by the type and nature of the pigment colorants along with the used binder.
4- Inclusion of softening agent in the padding formulations brings about a noticeable improvement in softness degree of the pigment dyeings.
5- Inclusion of TEA in the padding formulations has a positive impacts on fabric structure as well as on dyeing/finishing formulations thereby enhancing the extent of hosting and fixing the pigment particles, embedded in the binder film, onto and/or within the cellulose structure.