Investigations of stretch and recovery properties of knitted socks

Abstract

Knitted fabrics are renowned for stretch properties which owe to their comfort properties such as formability, fitting to the human body and shape retention after wearing. Optimum stretch is basic requirement in knitted socks to support blood flow in legs and feet. This stretch is achieved with fabric structure type and material used in it. Different factors affect the stretch and recovery of sock, but most contributing factors are elastane percentage, main yarn material and finishing process type. Four different percentages of elastane in plaiting (4%, 6%, 8% and 10%), two main yarns materials (Cotton and Polyester/Cotton PC), and two finishing process types(Wash and bleach) were taken as level of input variables to study their effect on stretch and recovery. Stretch and recovery tests were performed on knitted sock tube. After testing, Minitab software was used for analysis of variance of obtained results using full factorial design. Significance of all factors and levels was analyzed. It was found that with the increase in elastane percentage stretch was decreased and recovery was increased. Cotton was found to have less stretch and more recovery percentage as compared to PC. Additionally it was observed that washing treatment produced significantly higher stretch and lesser recovery than bleaching. Similar trend was also observed in interaction plot indicating that all variables were dependent on each other.

Exploration of Effects of Graduated Compression Stocking Structures on Performance Properties Using Principal Component Analysis: A Promising Method for Simultaneous Optimization of Properties

“…Poor stretching results in a poor fit, leading to performance shortcomings such as discomfort. Compression stockings should be designed such that they maintain a uniform interface pressure gradient over the limb for effective recovery results [ 29 , 30 ]. Stretch measurements of all compression stockings were performed on a CETME Attrezzature Per Calzific instrument from Reggio Em., Italy, as per ASTM D 2594.…”

Knitted Denim Fabrics: Fabrication Process and Fibrous Influence on Several Properties of the Fabric

“…The looping design of knit fabrics is made out of interlocking series of loops, allowing even non-stretchy yarns to condense and straighten out when pulled down. 70 The amount and type of elastance incorporated in the fabric also intensify the stretchability. As shown in Table S8 (in the supporting material), the elongation percentage at both length and width decreases with the increase in polyester percentage.…”