**6.2 The relationship between yarn wicking and fabric wicking in reference to different constituent yarns for various directions of plain and twill fabrics**

The accompanying graphical figures (**Figures 6**–**17**) show the relationship between fabric wicking in various directions (warp, weft and diagonal) and its constituent yarn

**Figure 6.** *Relationship of wicking height between plain weave fabric (FP1) and constituent plied warp yarn (2/20<sup>s</sup> ).*

**Figure 7.** *Relationship of wicking height between plain weave fabric (FP1) and constituent single weft yarn (20<sup>s</sup> ).*

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wicking (warp or weft) for plain and twill weave structures, from coarser to finer count. The first six graphical figures (**Figures 6**–**11**) are for plain weave fabrics only, while the remaining (**Figures 12**–**17**) are for twill weave fabrics. For all of these representations, a linear relationship is found to be the best fit, and the associated regression equation is also derived to establish the relationship.

**Table 6** has a relationship matrix containing all of the regression equations (18 numbers) from **Figures 4** to **9**, expressing substantial evidence of a highly positive relationship between fabric wicking (y) and yarn wicking (x) for plain weave samples. The coefficient of determination (*R*2) is found to be in the range of 0.836–0.991, which means the coefficient of correlation values are almost closer to 1, which indicates that the proportion of variation is very low in the dependent variable that can be attributed to the independent variable within the range of experiments. The R2 values *Absorbency and Wicking Behaviour of Natural Fibre-Based Yarn and Fabric DOI: http://dx.doi.org/10.5772/intechopen.102584*

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**Figure 11.** *Relationship of wicking height between plain weave fabric (FP3) and constituent single weft yarn (40<sup>s</sup> ).*

**Figure 12.** *Relationship of wicking height between twill weave fabric (FT1) and constituent plied warp yarn (2/20s ).*

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**Figure 14.** *Relationship of wicking height between twill weave fabric (FT2) and constituent plied warp yarn (2/30s*

**Figure 15.** *Relationship of wicking height between twill weave fabric (FT2) and constituent single weft yarn (30<sup>s</sup> ).*

*Absorbency and Wicking Behaviour of Natural Fibre-Based Yarn and Fabric DOI: http://dx.doi.org/10.5772/intechopen.102584*

**Figure 16.** *Relationship of wicking height between twill weave fabric (FT3) and constituent plied warp yarn (2/40s ).*

**Figure 17.** *Relationship of wicking height between twill weave fabric (FT3) and constituent single weft yarn (40<sup>s</sup> ).*

of the diagonal-way samples are between the R2 values of warp-way and weft-way samples composed of coarser to medium fineness yarns (20s and 30s), most likely due to the resultant effect of both the constituent plied warp and single weft yarns because the yarns are not in the direction in which the wicking has been measured. Regardless of warp or weft yarns, the relationship in a diagonal direction is found to be inferior for finer count (40s) fabric samples. As seen in **Table 2**, this result might be attributable to the lower fabric cover.

The correlation of wicking behaviour between fabrics of different directions (warp-way, weft-way and diagonal way) with respect to their constituent warp and weft yarns for twill weave samples is shown in a single representation using a similar relationship matrix derived from **Figures 10**–**15** and arranged as **Table 7**. This table


#### **Table 6.**

*Matrices of regression equations and R<sup>2</sup> values between fabric wicking and yarn wicking for plain weave fabric samples.*


#### **Table 7.**

*Matrices of regression equations and R<sup>2</sup> values between fabric wicking and yarn wicking for twill weave fabric samples.*

also aids in the identification of differences in relationship with plain weave samples of similar types as displayed in **Table 6**.

From the tabulated data of twill weave fabrics, the relationship of wicking between fabric and yarns is found to be much stronger (as the range of *R*2 lies within 0.912–0.991) compared with that of the plain weave in the fabric axis of the twill weave creating less amount of disturbance on capillary action due to the lower number of interlacements of twill design. As a result, the smooth movement of liquid within the yarn structure helps in a more effective wicking effect than plain weave structures, strengthening the relation between yarn and fabric wicking. As a result,

regardless of the different directions of experimental fabric samples used in this investigation, changes in yarn fineness have a comparatively smaller impact on the connection [44].
