This study used three types of knitted fabric, which have similar knitted structure and differ in use of yarns. Each fabric used two types of yarn, the first one being the same for three fabrics, the second one is different. | Journal of Science & Technology 127 (2018) 075-079 The Effect of Spandex Yarn on Structural Parameters and Elasticity of Polyamide-Spandex Knitted Fabric Vu Thi Hong Khanh1,*Bui Thi Minh Thuy2, 1 2 Hanoi University of Science and Technology, No. 1, Dai Co Viet Road, Hai Ba Trung, Hanoi, Viet Nam Textile Research Sub-Institute, No. 345/128A, Tran Hung Dao Str., Dist. 1, Ho Chi Minh City, Viet Nam Received: January 03, 2018; Accepted: June 25, 2018 Abstract This study used three types of knitted fabric, which have similar knitted structure and differ in use of yarns. Each fabric used two types of yarn, the first one being the same for three fabrics, the second one is different. The first yarn was wound yarn, it was composed of one PA texture multi-filament yarn and one covered yarn (the core component is spandex monofilament; the covered component is composed of PA texture multi-filament yarn). The second yarn is spandex mono-filament yarn, it was different for three fabrics. This research was studied the effect of spandex content of fabric, fineness and structure of spandex yarn on the structural parameters and elasticity of fabrics. The tests to determine the structural parameters and elasticity of fabrics were carried out according to the Vietnamese or international standard methods. The results of the study showed that the fineness of spandex yarn (second yarn) is the important factor that could effect on the elasticity of fabric. Keywords: knitted fabric, elasticity of fabric, fineness of yarn, structure of yarn, spandex. 1. Introduction* 2. Experimental In recent years, there has been increasing interest in the use of compression garments in many areas such as medical textile, sportive clothing and body-shaping clothing etc [1, 4, 6]. All these garments use the similar principle to create pressure on the surface of the body, they are usually made of high elastic fabric. When compression garments are wearing, fabric is always extended, but, due to .
