Abstract
The present paper attempts to investigate the relationship between fabric porosity and light permeability of the knitted structures, namely, rib 1 × 1, rib 2 × 1, single jersey, and plain structure. The rationale is that pores (in a fabric) would allow light to pass through but at the same time provide a quantitative assessment of the UV light permeability of the knitted fabrics, an indication of the protective capacity of the fabrics against UV radiation. The porosity and corresponding light permeability of the knitted structures were measured after varying the following knitting parameters: stitch length, stitch density, and tension on the machine. Furthermore, this work has enabled the development of an apparatus that can measure the amount of light transmitted through the knitted fabrics. The results generated by the equipment were validated through the use of regression equations.
Highlights
A large volume of the fabric remains occupied by airspaces because of the way in which the yarns and fabric are constructed
The percentage lux values increase with increasing stitch length due to increase in stitch density
As a result of research, it is seen that the light permeability of fabric knitted at different tensions and machine settings vary greatly
Summary
A large volume of the fabric remains occupied by airspaces because of the way in which the yarns and fabric are constructed This implies that there are a large number of porous areas within a given knitted fabric structure. The energy of UV radiation received by a textile can be subdivided into the following three components: the energy reflected, absorbed, and transmitted by the textile product. The latter irradiates the human organism directly. These components are formed by the physical and chemical features of the textile product and by the structural characteristics such as porosity, fabric thickness, and structure (Hanke et al, Jędrzejewski et al, and Gabijelcic et al.) [1,2,3]. One of the objectives of the research was to come up with a model that can predict the porosity of simple weft knitted structures using their geometrical details
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