Study of knitted fabrics with ultra-low modulus based on geometrical deformation mechanism

Abstract

In some cases, the value of clothing pressure on the human body is more than desired which results in discomfort, especially for those designed for infants, aged people and professionals. In order to reduce the pressure so that it is at a comfortable level, this investigation developed a knitted fabric with ultra-low modulus based on the geometrical deformation mechanism. Experimental results show that the tensile deformation is due to the geometrical deformation and physical deformation. This paper focuses on the former, which is greatly improved by reknitting of the unroved yarn with remarkable crimps. The tensile results indicate that compared with the normally rib-knitted fabric, which the elongation of the reknitted fabric reaches at 50%, the tensile modulus decreases by 96%. It is proved that increasing the geometrical deformation is an effective method for reducing the elastic modulus. In addition, the pressure of men's cotton socks and ladies' stocking and tights on skin is measured. Experimental results show that the value of the pressure is as high as 2.959 kPa, which far exceeds the comfort pressure threshold of 0.667 kPa. Furthermore, this paper also studies the application of this developed reknitted fabric. The study of geometrical deformation mechanism-based ultra-low-modulus fabrics with knitting of the yarn with remarkable crimps has important significance, and provides scientific guidance for improving clothing pressure.