ABSTRACT
The innovation of the processes of the textile materials is becoming more and more important to reduce the amount of water and the use of machinery time in the textile industry. The consumption of textile fibers in Brazil in 2014 was 13,3 kilograms per capita and to produce these fabrics with 80 liters of water on average are used to each kilo of treated substract. This study aims to improve the pre-bleaching process for textile fabrics using the ozone with the objective to reduce the consumption of water, chemical products, time as well as energy. The potential for reducing ozone (2.07 V) is greater than the reduction potential of hydrogen peroxide (1.77 V), which makes the ozone is an excellent oxidising agent. The evaluation of results in resistance (strength and traction), dyeing properties (K/S, FC % and DE) and the whiteness degree of pre-bleached fabrics using cold ozone indicates that this is a promising process for the textile industry, since it not only eliminates the use of hydrogen peroxide and sodium hydroxide but also allows eliminating the process in at least 60% also reducing water consumption in 50%.
Keywords:
Textile materials; Cotton; Polyester; Pre-bleaching process; Ozone.
