Affiliation:
1. Cotton Technological Research Laboratory, Matunga, Bombay 400 019, India
Abstract
Forty varieties of cotton, ten from each of the four commercially cultivated species, G. arboreum, G. herbaceum, G. barbadense, and G. hirsutum, at two fiber maturity levels of 60% and 75% were examined for differences in their cross-sectional shapes. The fibers were classified into three different categories of cross-sectional shape, round (circularity value above 0.80), elliptical (circularity value between 0.80 and 0.50), and flat (circularity value less than 0.50), as per ASTM standards. G. arboreum and G. herbaceum (Old World cottons) had a greater percentage of fibers of round cross- sectional shape at both the fiber maturity levels than G. barbadense and G. hirsutum (New World cottons) indicating that the cross-sectional shape may be a varietal characteristic. The differences in the cross-sectional shape of fibers among the cottons of different species were further confirmed from the data obtained on the circularity of fibers at various stages of development for cotton bolls of each of the four species.
Subject
Polymers and Plastics,Chemical Engineering (miscellaneous)
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