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17CHEMISTRY SCIENCES
THE USE OF POLYMER COMPOSITIONS BASED ON MODIFIED COLLAGEN AS A THICKENER
FOR PRINTING INKS
Djurayeva Sh.,
independent researcher,
Tashkent Institute of Textile and Light Industry, Tashkent, Republic of Uzbekistan
Tashpulatov S. Doctor of Technical Sciences, Professor Tashkent Institute of Textile and Light Industry, Tashkent, Republic of Uzbekistan
Abstract
Creation of a new composition for printing with pigment dyes of textile materials, including a pigment dye, a direct dye, a thickener containing modified collagen produced
from local raw materials, a binder and water, which allows good consistency, providing the necessary clarity (sharpness) of the contours of the pattern and its adhesion to the fabric.
Keywords: thickener, modified collagen, pigment dye, clarity (sharpness), consistency, homogeneity, adhesion.
The most urgent problem today is the issue of improving the quality of the coloristic design of fabrics, including further improvement of the printing process of textile materials. At textile enterprises of the Republic of Uzbekistan, mainly imported ones are used as a thickener components such as alginic acid salts, em-print, etc. [1].
In this regard, we have studied the possibility of replacing them with drugs of domestic production. For this purpose, 60% hydrogen peroxide, 60 wt. was used.% collagen hydrolysate of 20% concentration, 92% acrylic acid and 89% nitrile acrylic acid, 30% pen-etrator and dry powdered collagen produced from local raw materials. Initially , several recipes were tested printing ink. A well-known printing ink based on a thickener of pigment dye, binder, thickener and water. However, the use of such printing ink leads to the production of non-intensive and fragile to the physical and mechanical effects of paints.
The closest analogue is a printing ink based on a pigment dye, a binder from a mixture of urea-formaldehyde resin with a catalyst - ammonium chloride and a thermoplastic binder and a "Stearox-water" type thickener [2].
Used in the "Stearox-water" type thickener GKZH-94 (ethyl(methyl)hydrosiloxane polymer) being an effective hydrophobizer for the textile, leather and shoe, pulp and paper industries, absolutely does not mix with water even in the presence of strong nonionic surfactants.
During preliminary studies, it was found out that with strong mixing, the resulting thickener based on an emulsion of the " Stearox-water" type in the presence of Stearox - 6 is not stable in time and delaminates in more than 2 hours. As a result, it entails printing ink, consistency and homogeneity are violated, which leads to spreading of the coloring composition, uneven prints on the fabric, resulting in poor adhesion.
These disadvantages do not ensure the production of high-quality patterned colors on fabrics. It was found
that a thickener containing modified collagen does not impair the coloristic properties of printed drawings. According to the results of preliminary studies of the intensity of the colors, the nature of the shade, hardness, resistance to soap and dry friction, various thickener compositions were selected. The composition of the paint, which includes pigment dye, direct dye, thickener, binder and water, is more effective in terms of coloristic index, modified collagen is used as a thickener, and an emulsion based on a triple copolymer emulsion of butyl acrylate, methyl methacrylate and acrylic acid (35.37:46.68:17.95, respectively) is used as a thermoplastic binder, which would allow it to have good consistency, provide the necessary clarity (sharpness) of the contours of the drawing and its adhesion to the fabric.
To obtain high-quality patterned coloring on fabrics by any classes of dyes, the following requirements are imposed on printing inks:
- good consistency with sufficient ability to retain the dye and thereby ensure sufficient clarity of the pattern and the absence of spreadability when printing fabric;
- the printing ink should wet the print shaft engraving well and be retained in it;
- it is good to penetrate through the template sieve (when printing with mesh templates) and not clog it when printing;
- evenly and fully transfer to the fabric during the printing process;
- have optimal deformation properties that ensure the formation of continuous and uniform patterns with machine printing methods;
- have good storage stability and high efficiency under various operating modes of printing machines.
The main property of the printing ink from the dye solution is the presence of a thickener in it, which forms a specific internal structure.
Table 1
Coloristic characteristics of printed fabrics
Indicators Proposed method Prototype
Example 1 Example 2 Example 3
Contour sharpness, coef 0,423 0,430 0,450 0,380
Foam viscosity, pp 54,6 65,3 55,7 50,4
Degree of destruction, % 62,3 48,9 56,4 64,5
Film adhesion, (N/m) 1522 1528 1520 1480
Relative coloring capacity, % 91 92 87 76
Color intensity, 100/R 24,2 24,6 23,8 19,7
Resistance of colors to washing, points 4 4 4 3
Resistance of colors to friction, points 4 4 4 3
The above composition, which is structured aqueous solutions of natural and synthetic hydrophilic polymers, meets such requirements.
The proposed composition provides high-quality patterned coloring on fabrics, as well as high viscosity, adhesion and a sufficiently low degree of destruction, and thereby provides the necessary clarity (sharpness) of the contours of the pattern and the absence of spreading when printing fabric.
As the research results have shown (Table 1), the correctly selected thickener and other components of the composition give the printing ink sufficient viscosity, stickiness, plasticity and other properties, allow to obtain a soft elastic, transparent uniform and firmly fixed film on the fabric and do not reduce the brightness of the color. The coloristic characteristics of cotton fabrics printed by compositions are presented in the table. From the received data it can be seen, that according to the values of the sharpness of the contour of the drawing, adhesion and resistance to friction, the recommended composition gives better results compared to the prototype on all tested fabrics. At the same time, it does not differ in increasing the stiffness of tissues. All components of the claimed composition are relatively inexpensive and stable during storage.
The printing process does not require any additional changes to the existing textile printing technology. The selection of the initial components for the creation of a printed coloring polymer composition is
based on the principle that provides for the possibility of further practical implementation of the results of research in the tech industry and maximum reproducibility of the results.
Thus, all the proposed compositions of polymer composition thickeners can be successfully used in the textile industry, it is environmentally and economically beneficial for the industry.
References
1. Sharipov, J.S. The use of polymer compositions based on polyvinyl alcohol as a thickener for printing inks / J.O. Sharipov, B.A. Mavlonov. - Text: direct // Young scientist. - 2016. - tt° 3 (107). - Pp. 355356. - URL: https://moluch.ru/archive/107/25255 / (accessed: 06.10.2021).
2. Copyright certificate of the USSR No. 527491, cl. D 06 P 1/52, 1976 (prototype).
3. Konkova T.A. et al. "Chemical technology of fibrous materials", J. "Textile industry", No. 8, 1973, p. 55.
4. Kadyrov T.ZH. Creation and technologies for obtaining new multifunctional compositions for the production of leather and fur. Diss. ... doct. technical sciences. Tashkent, 2003, pp. 69-70.
5. Patent of the Republic of Uzbekistan for invention No. IAP 03517. Composition for finishing the surface of the skin. Toshev A.Yu., Kadirov T.Zh., Ruz-iev R.R. 15.10.2007. [Published in Russian (English)]
