The influence of fiber initial (tensile) modulus on the migratory behavior and physical properties, especially abrasion resistance, of polyester-cotton blends was studied. Nine selected polyesters were blended with combed cotton on the cotton system. For each type of polyester, the polyester/cotton ratio was nominally 50/50, 65/35, and 80/20 by weight. Portions of yarn samples were sectioned and photomicrographs were made. The radial distribution of the blend compo nents have been characterized by a "migration index." It has been found that the initial moduli of component fibers influence the migration of fibers and also the abrasion resistance of fabrics woven from these yarns.
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20.
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