On the Pressure Behavior of Tubular Weft Knitted Fabrics Constructed from Textured Polyester Yarns

Abstract

This study attempts to investigate the pressure behavior of tubular knitted fabrics after a long period of time. For this purpose, two kinds of knitted fabric (plain and interlock) with various stitch lengths were chosen and the interfacial pressure and pressure reduction of fabrics after 48 hours were analyzed at different strain percents. The same tests were performed on the same specimens after repeated washing and repeated usage. Finally, the experimental pressure values were compared with the theoretical results obtained from Laplace's law. The results reveal that the stitch length and strain percent are important factors affecting the interfacial pressure and pressure reduction of both plain and interlock fabrics. As the results of statistical analysis, the repeated washing and repeated usage have significant effect on interfacial pressure and pressure reduction of both fabrics. The comparison between experimental pressure values and theoretical values calculated from Laplace's law shows a considerable difference in both plain and interlock fabrics.

Compression Garments for Medical Therapy and Sports

“…Since clothing pressure largely depended on its biaxial extension and stress relaxation properties [81], research studies have been conducted to find the relationship between the clothing pressure of knitted fabrics and stress under extension and recovery processes [82,83]. The pressure behavior of tubular knitted elastic fabrics at different extension levels during 48 hours was investigated and it was found that the stitch length and extension rate are the vital factors that affects the interfacial pressure and pressure reduction [84]. The effects of spandex feeding rate and the fabric structure of elastic fabric were also analyzed [85].…”

Analysis of the parameters affecting pressure characteristics of medical stockings

“…Maleki et al. [15] have observed the pressure behavior of tubular knitted fabrics (plain and interlock) with various stitch lengths (0.22, 0.25, 0.29 and 0.32 cm) after a long period of time. The pressure reduction of the fabrics was analyzed after 48 h at the different strain percent (10%, 20% and 25%).…”

Medical textiles

“…Adjusting the raw fibre, yarn and knit structure can produce stockings of varying compression. Maleki et al [428] investigated the influence of stitch length, strain, washing operation and repeated usage on the pressure behaviour of knitted fabrics; all of which are important factors for the stocking. Further studies have demonstrated that the elastane yarn count is the most effective parameter affecting pressure characteristics [429] and that the tensile energy, tensile strain, shearing stiffness and bending rigidity are all key mechanical properties for compression stockings [430].…”