Revista de Ciência e Engenharia Têxtil

 The mechanical behaviour of the Dorlastan® core spun yarns having different counts (100, 50, 33.33 and 25 tex) and various elastane drafts is modeled in this paper. The theoretical analysis is based on the response of the elastic core spun yarn to the tensile and the relaxation tests at different strain levels. These tests have permitted us to identify the non linear viscoelastic behaviour of the Dorlastan® core spun yarn. Analogical approach is employed to propose the rheological model describing the mechanical behaviour of the elastic core spun yarns. Comparing with the experimental data, the theoretical model gives a reasonably accurate prediction of the mechanical behaviour of the elastic core spun yarns for both tensile and relaxation tests.

 An attempt has been made to analyze the effect and as well as to gain an insight of changing the loop length of the knitted fabric against non-dimensional parameters such as the loop shape factor during different stages of relaxation using corespun cotton/lycra yarn. The yarn count, machine gauge and machine diameter are kept constant but the loop length is varied. Three different structures (Popcorn, Double Airtex and Honeycomb) at 0.106, 0.118 and 0.129 inches loop length for each structure are produced. This study will help to analyze the relationship between loop length and the non-dimensional parameters like Kc, Kw, S, Kc/Kw.

 Cotton is the natural vegetable fiber of great economic importance as a raw material for cloth. An eco friendly natural antibacterial finish has been prepared from the plant extract for the textile application. Herbal extracts have been applied to cotton and organic cotton fabric by pad, dry cure method. This paper consists of a detailed discussion of the herbal finish with Antibacterial effect on cotton and organic cotton fabrics .The Antibacterial property of fabrics is considered to be more important and inevitable finish for garments, which are in direct contact with human body.