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Study on heat and moisture vapour transmission characteristics through multilayered fabric ensembles
A detailed study on the heat and moisture vapour transmission characteristics of different types of single and multi-layered
fabric ensemble by using sweating guarded hot plate (SGHP) has been reported in the present paper. A comparison has been made
on thermal and moisture vapour transmission properties of five different insulative fabrics, namely, knitted-raised fabric,
needle punched nonwoven, through air bonded nonwoven, spunbonded-through air bonded sandwich nonwoven and warp knitted spacer
fabric and three different coated fabrics, namely, plain woven rubber coated, plain woven polyester polymer coated and plain
woven polytetrafluoroethylene (PTFE) coated fabric, used for thermal insulation purpose. ANOVA has been conducted to analyse
the significance of type of insulative and coated fabrics used. Sandwich nonwoven fabric which has higher thickness and porosity
shows higher thermal resistance followed by through air bonded fabric, raised fabric, needle punched fabric and spacer fabric.
Spacer fabric shows lesser evaporative resistance due to its lesser thickness and larger aperture size, which increases the
diffusion of moisture vapour. Needle punched fabric shows slightly higher evaporative resistance than spacer fabric, followed
by raised fabric, through air bonded fabric and sandwich nonwoven fabric. Permeability index of different multilayered fabric
ensembles are also compared. 相似文献
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