Figure 4: Relationship between compact and conventional spun yarn UT3 hairiness.

The scatter plot showing the Zweigle hairiness indexes (S3) for conventional versus compact yarns is given in Figure 5. Unlike the results with the UT3, the correlation between values for compact versus non-compact spinning is very low. The hairiness levels of the compact yarns are generally very low regardless of the levels exhibited by the conventional yarns. However, a few of the yarns in all length groups had S3 values that were quite high.

Figure 5: Relationship between compact and conventional spun yarn Zweigle S3.

The foregoing observations are corroborated by the analysis of variance results in Table 3. The effect of compact spinning is highly significant, as is the interaction between length groups and compact spinning (Group x Spinning System).