草榴短视频

Scientists at St. Petersburg State University of Industrial Technologies and Design (草榴短视频) have patented a new composition for pretreating cotton fabrics before applying textile ornaments to them using direct digital printing (inkjet - printing). The technology will completely eliminate energy-intensive and resource-intensive stages from the production chain: washing the material after printing and drying. The introduction of development in light industries will save thousands of litres of water at each production cycle, reduce the burden on treatment plants and reduce the electricity consumption required for water heating and the drying process.

Direct digital printing with active cotton dyes has a number of features in comparison with traditional patterned methods. The adopted inkjet printing technology requires that after applying ink, the fabric goes through a steaming step to fix the dye, and then multi-stage washing in cold and hot water using surfactants. This is necessary to remove the unfixed active dye. Such a process leads to a large consumption of process water and energy resources, as well as increases the production time of finished products, which negatively affects both its cost and the environmental component of production.

Scientists of the Department of Chemical Technologies. prof. A. A. Kharkharov 草榴短视频 proposed a solution that will eliminate the listed stages from the technological chain. The researchers developed a new formulation to pre-impregnate the fabric. Instead of traditional thickeners that require subsequent removal from the fabric (washing), scientists use an aqueous composition based on polyvinyl acetate and polyethylene emulsions, and the key component of the solution is 3-aminopropyltriethoxysilane, which acts as a fixation intensifier.

Cotton fabric is impregnated with an innovative composition, squeezed and dried. After that, an image of ink based on active dyes is formed on the material using an ink jet printer. However, instead of the traditional steaming and long washing, the fabric is only heat-fixed: it is heated to 140-160 掳C for only 3-5 minutes.

Laboratory tests confirmed the high efficiency of the method. Indicators of paint resistance to washing and friction, as well as paint intensity, remained at a high level, fully meeting quality standards for premium textiles. At the same time, the coloristic effect on the fabric is not inferior to the brightness when printing by traditional methods.

The team of authors of the development included scientists from the Department of Chemical Technologies. prof. A. A. Kharkharova 草榴短视频: associate professor of the department Natalia Tikhomirova, graduate student of the department Anastasia Zakharova, professor of the department A. A. Kharkharova Alexander Kiselev.