Prediction of Thermal Conductivity of Elastic Single Jersey Knitted Fabric

Figures & data

Figure 1. Stitch overlapping (Khalil et al. 2023).

Figure 2. The direction of fibers compared to heat flow direction.

Table 1. Elastic SJKF specifications.

Yarn count	SWP (%)		4	5	6	7	8
25 Ne	Loop length (mm)	2.7	√	√	√	√	√
		2.9	√	√	√	√	√
		3.1	√	√	√	√	√
		3.3	√	√	√	√	√
		3.4	√	√	√	√	√
35 Ne	Loop length (mm)	2.7	√	√	√	√	√
		2.9	√	√	√	√	√
		3.1	√	√	√	√	√
		3.3	√	√	√	√	√
		3.4	√	√	√	√	√

Figure 3. Experimental and predicted values from Schuhmeister, Militky, and ME 2 of thermal conductivity of elastic knitted fabric produced from yarn count 35 Ne.

Figure 4. Theoretical image of elastic knitted fabric with the overlapping.

Figure 5. Fibres thermal conductivity components to heat flow direction.

Figure 6. Experimental and predicted values of thermal conductivity of elastic knitted fabric produced from yarn count 35 Ne.

Figure 7. Experimental and predicted values of thermal conductivity of elastic knitted fabric produced from yarn count 25 Ne.

Figure 8. Predicted thermal conductivity values from the new model vs experimental values at different levels of SWP and yarn count.

Figure 9. Experimental thermal conductivity vs predicted thermal conductivity from a new model.

Figure 10. The predicted values of thermal conductivity of elastic SJKF versus loop length.

Table 2. Curve fitting equations for the relation between thermal conductivity and loop length.

Yarn count (Ne)	SWP (%)	Coefficient of determination (R^2)	Curve equation
25	4	0.974	y = 0.013x^2 − 0.089× + 0.226
	5	0.991	y = 0.012x^2 − 0.082× + 0.215
	6	0.994	y = 0.006x^2 − 0.048× + 0.165
	7	0.956	y = 0.010x^2 − 0.073× + 0.200
	8	0.944	y = 0.013x^2 − 0.091× + 0.231
35	4	0.997	y = 0.008x^2 − 0.058× + 0.174
	5	0.999	y = 0.006x^2 − 0.049× + 0.157
	6	0.999	y = 0.007x^2 − 0.051× + 0.157
	7	0.996	y = 0.006x^2 − 0.047× + 0.150
	8	0.997	y = 0.007x^2 − 0.051× + 0.153

Khalil, A., M. Eldeeb, P. Těšinová, and A. Fouda. 2023. “Theoretical Porosity of Elastic Single Jersey Knitted Fabric Based on 3D Geometrical Model of Stitch Overlapping.” Journal of Natural Fibres 20 (1). https://doi.org/10.1080/15440478.2023.2181274.

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