Prediction of Pore Size Characteristics of Needle-Punched Nonwoven Geotextiles Subjected to Uniaxial Tensile Strains

Table 3

Properties of nonwoven structures [13].

	TB1	TB2
Mass per unit area (g/m^2)	30	30
Thickness (mm)	0.44	0.43
Density of fibre (g/cm^3)	1.38	1.38
Diameter (μm)	16.6^a	28^a
	0.81	0.77
Out-of-plane Poisson’s ratio	0.17^b	0.17^b
In-plane Poisson’s ratio in machine direction	2.90 (4%)	3.81 (4%)
	2.64 (8%)	2.92 (8%)
	2.38 (12%)	2.61 (12%)

Note: ^aThe diameters of fibres were calculated depending on the parameters given in the literature [13]. TB1 and TB2 were produced by blending the homofil and bicomponent polyester fibres in equal proportions by weight; hence, the diameter of fibres is taken as the average diameter of the two fibres, as mentioned by Rawal and Agrahari [13]. ^bAssumed value.