The effect of three-layer weft knitted material structure and composition upon performance properties

Abstract

The effect of three-layer weft knitted spacer material content and structure upon the characteristics of uniaxial tension, biaxial punching before and after fatigue punching, and at multi cycle low-stress (wearing level) punching were investigated. Three different spacer structures were knitted using four types of the same 20 tex linear density spun yarns. For three-layer weft knitted samples, innovative fibers, which are used in the production of functional clothing, were selected: Coolplus® 100% polyester (PES); Trevira CS® 100% PES; 60% PES; 40%PES, 60% PES with 0.02% carbon fiber and 67% cotton, 33% PES with 0.02% carbon fiber. It was defined that the samples, which have a plain jersey knitting pattern in the face and back layers, and a similar position of spacer yarns on the dial and cylinder needles, have the highest values of mass per unit area, but 1 × 1 tuck stitches in the face layer have a greater effect for material thickness. Besides, 1 × 1 tuck stitches in the face layer have a greater effect upon the uniaxial behavior and anisotropy of three-layer weft knitted spacer materials than on spacer yarn position in the connecting layer. The investigations of biaxial fatigue punching up to 50 N, which corresponds to wearing conditions, showed that the most stable and less deformable materials were the three-layer weft knitted spacer materials with a plain jersey knitting pattern in the face and back layers and a similar position of spacer yarns on the dial and cylinder needles. They also were characterized by the highest mass per unit area and medium thickness.

Development and evaluation of 3D knitted fabrics to protect against mechanical risk

“…A systematic study of mechanical behaviour and the influence of the structure factors is necessary, which would allow proper choice of the fabric structure to obtain high-performance 3D knitted fabrics. Meanwhile, little research has been done to study the effect of yarn content and knitted structure type upon three-layer weft-knitted spacer fabric mechanical behaviour [29]. Based on the existing literature, it has been found that the relationships between the knitted structures and the properties of the weft-knitted spacer fabrics are still not established [30].…”

Review on the design and application of concrete canvas reinforced with spacer fabric

“…Thus, it possesses less structural integrity and inferior mechanical properties than WKSF. 23,24 Most properties of weft-knitted spacer fabric are similar to WKSF, but limited researches have been launched with regard to this particular fabric. In recent years, compressive characteristics, air permeability, water vapor permeability and thermal conductivity of weft-knitted spacer fabric are often explored for cushioning applications and wound dressings.…”